JP4240065B2 - Disk drive device - Google Patents

Description

  The present invention relates to a disk drive device for recording and / or reproducing information signals to and from an optical disk, and in particular, a so-called slot-in type disk drive device that is automatically mounted by directly inserting an optical disk into the device body. About.

  Conventionally, optical disks such as CD (Compact Disk) and DVD (Digital Versatile Disk) BD (Blue-ray Disk), and magneto-optical disks such as MO (Magneto optical) and MD (Mini Disk) have been widely known as optical disks. Various disk drive devices corresponding to these disks and disk cartridges have appeared.

  In the disk drive device, the lid or door provided on the housing is opened, and the disc is directly mounted on the turntable facing from the housing, and the disc is placed on the disc tray that is horizontally removed from the housing. Then, there are a type in which the disc is automatically mounted on the turntable inside the housing when the disc tray is pulled in, or a type in which the disc is directly mounted on the turntable provided in the disc tray. However, both types require operations such as opening and closing the lid and door, inserting and removing the disc tray, and loading the disc on the turntable.

  On the other hand, there is a so-called slot-in type disk drive device in which a disk is automatically mounted on a turntable simply by inserting a disk from a disk insertion / removal opening provided on the front surface of a housing. The slot-in type disk drive device includes a pair of opposing guide rollers that sandwich the disk inserted from the disk insertion / removal opening, and rotates the pair of guide rollers in opposite directions to thereby remove the disk insertion / removal opening. There is a type that performs a loading operation of drawing an inserted disk into the housing and an ejecting operation of ejecting the disk from the disk insertion / removal port to the outside of the housing.

  Further, for example, mobile devices such as notebook personal computers equipped with a disk drive device are required to be further reduced in size, weight, and thickness, and the accompanying demand for reduction in size, weight, and thickness of the disk drive device is increasing. Therefore, in the slot-in type disk drive device, a contact portion that is in contact with the outer peripheral portion of the disk inserted from the disk insertion / removal port of the front panel is provided at the distal end portion, and the base end portion is rotatably supported. A plurality of rotating arms are arranged, and while the rotating arms are rotated in a plane parallel to the disk, a loading operation for pulling the disk from the disk insertion / removal opening into the housing and a disk insertion / removal opening A disk drive device that performs an ejection operation for discharging from the housing to the outside of the housing is supplied (for example, see Patent Document 1). Ether.). Among the disk drive devices that have been reduced in thickness as described above, the ultra-thin disk drive device mounted on a notebook personal computer or the like has a thickness of 12.7 mm or a hard disk drive that is further reduced in thickness. A disk drive device that has been reduced to 9.5 mm, which is the same thickness as an (HDD) unit, has also been proposed.

  In such a disk drive device in which a plurality of rotating arms are arranged so as to be rotatable in a plane parallel to the disk, when the disk is conveyed into the housing, the base unit provided with the turntable is raised. The disk is chucked. The chucking of the disc is performed by sandwiching the periphery of the center hole of the disc between the turntable and the top plate of the housing and press-fitting the engaging convex portion of the turntable into the disc center hole.

  In such chucking, when the center hole is not located almost directly above the turntable, the disk and the turntable are guided by guiding the center hole with a tapered surface provided on the outer peripheral portion of the engaging convex portion during press-fitting. Absorbs the deviation. If there is a gap between the center hole and the turntable in this way, a large load is applied to the periphery of the center hole of the optical disc, and the sound that accompanies the press-in increases. Will be given.

JP 2005-100595 A

  Accordingly, the present invention provides a disc drive apparatus that inserts and ejects a disk by rotating a plurality of rotating arms, and performs centering so that the center hole is almost directly above the turntable when the disk is drawn into the apparatus main body. An object of the present invention is to provide a disk drive device that can be used.

In order to solve the above-described problems, a disk drive device according to the present invention includes a device main body provided with a disk insertion / removal port through which a disk-shaped recording medium is inserted / removed on the front side, and a device main body provided in the device main body. A disk holding unit for rotatably holding a disk-shaped recording medium, and an optical pickup that is fixedly disposed in the apparatus main body and records and / or reproduces information signals with respect to the disk holding unit and the disk-shaped recording medium A main chassis that supports the base unit provided with the disk, and one in a plane parallel to the disk-shaped recording medium held by the disk holding portion in a direction perpendicular to the insertion / removal direction of the disk-shaped recording medium of the apparatus main body an arm portion which is rotatably supported on the side, provided at a tip of the arm portion, when the disc-shaped recording medium is inserted the disc-shaped recording medium A support portion for supporting the side surface, a biasing arm for biasing the disc-shaped recording medium, a biasing spring for biasing pivoting the arm portion to the discharging direction of the disc-shaped recording medium, urging the A regulating arm that regulates the urging force of the urging arm by the spring to be constant, and a first arm that is provided on the one side of the apparatus main body and supports the side surface of the disc-shaped recording medium when the disc-shaped recording medium is inserted. 1 centering member and the other side in a plane parallel to the disc-shaped recording medium held by the disc holding portion in a direction orthogonal to the insertion / removal direction of the disc-shaped recording medium of the apparatus main body, and a second centering member for supporting the side surface of the Jo recording medium, the first centering member and the second centering member, the disc relative to the main chassis Is restricted position to support the side surface of the recording medium, the center said biasing arms, by energizing the disc-shaped recording medium by urging force is regulated constant by the regulating arm, the disc holding portion The disc-shaped recording medium is supported at the centering position at the three points.

  According to the disk drive device of the present invention, when the disk-shaped recording medium is pulled in until the center hole is positioned near the disk holding portion, the position of the first centering member is regulated at the centering position. In the present disk drive device, the second centering member is regulated to the centering position of the disk-shaped recording medium. Therefore, the disk drive device according to the present invention supports the disk-shaped recording medium by the first centering member, the second centering member, and the urging arm that applied the urging force to the disk-shaped recording medium. Thus, centering can be surely performed. Accordingly, it is possible to suppress the generation of chucking sound caused by chucking in a state where the center hole of the disc-shaped recording medium and the turntable of the disc holding portion are shifted, and the load on the disc-shaped recording medium or the disc holding portion. .

  Hereinafter, a disk drive device to which the present invention is applied will be described in detail with reference to the drawings. For example, as shown in FIG. 1, the disk drive device 1 is a slot-in type disk drive device 1 mounted on a device main body 1001 of a notebook personal computer 1000. As shown in FIG. 2, the disk drive device 1 has a structure in which the entire device is thinned to about 12.7 mm, for example, a CD (Compact Disk), a DVD (Digital Versatile Disk), a BD ( It is possible to record / reproduce information signals to / from an optical disc 2 such as a blue-ray disc.

  First, a specific configuration of the disk drive device 1 will be described. As shown in FIGS. 3 to 5, the disk drive device 1 includes a housing 3 serving as an outer housing of the device main body. The housing 3 includes a bottom case 4 having a substantially flat box shape as a lower housing. The top cover 5 is a top plate that covers the upper opening of the bottom case 4. A main chassis that covers a disk transport mechanism 50 that transmits a drive force of the drive mechanism 120 and a drive mechanism 120 that transmits a drive force of the drive mechanism 120 and a base unit 22 that will be described later face upward in the housing 3. 6 is attached.

  As shown in FIGS. 2 and 5, the top cover 5 is made of thin sheet metal, and a top plate portion 5 a that closes the upper opening of the bottom case 4, and the periphery of the top plate portion 5 a is on both side surfaces of the bottom case 4. And a pair of side plate portions 5b that are slightly bent along. A substantially circular opening 7 is formed at a substantially central portion of the top plate portion 5a. The opening 7 is provided so that the engaging protrusion 33a of the turntable 23a that is engaged with the center hole 2a of the optical disc 2 is exposed to the outside during a chucking operation described later. Further, the periphery of the opening 7 of the top plate portion 5a slightly protrudes toward the inside of the housing 3 so as to come into contact with the periphery of the center hole 2a of the optical disc 2 held on the turntable 23a. A contact protrusion 8 is formed.

  A pair of guide projections 11 a and 11 b that guide the optical disk 2 inserted from a disk insertion / removal opening 19 described later while regulating the height of the optical disk 2 in the height direction are swelled toward the inside of the housing 3. Has been formed. The pair of guide protrusions 11a and 11b are raised so as to draw an arc in the insertion direction of the optical disc 2 at a position that is substantially symmetrical with respect to the center line along the insertion direction of the optical disc 2 passing through the opening 7, Further, it has a substantially partial conical shape that is raised so that the arc continuously reduces in diameter from the outside toward the inside in a direction substantially perpendicular to the insertion direction of the optical disc 2. That is, the pair of guide protrusions 11a and 11b has a shape in which the cone is divided along the axial direction and the tops of the cones face inward, and continuously from the outside toward the inside. It is low and thin.

  By having such a shape, the pair of guide protrusions 11a and 11b smoothly guides the inside of the housing 3 while correcting the shift in the width direction of the optical disk 2 inserted from the disk insertion / removal port 19. be able to. Moreover, the top cover 5 can improve the rigidity of the top plate part 5a by providing the guide protrusions 11a and 11b having such shapes. The main surface on the inner side of the top plate portion 5a is processed to reduce the frictional resistance with the optical disc 2.

  The bottom case 4 is made of a sheet metal formed in a substantially flat box shape, and the bottom surface portion thereof is substantially rectangular. On one side surface portion, a deck portion that is raised from the bottom surface portion and projects outward. 4a is provided. In the deck portion 4a, a loading arm 51 for drawing an optical disk 2 to be described later into the housing 3, a deck arm 200 for preventing the small-diameter optical disk 101 from being erroneously inserted and centering the large-diameter optical disk 2, and the deck arm A restricting arm 212 for controlling the urging force is rotatably supported.

  On the bottom surface of the bottom case 4, electronic parts such as an IC chip constituting the drive control circuit, connectors for electrical connection of each part, detection switches for detecting the operation of each part, and the like are arranged. A circuit board 59 is attached by screwing or the like. A connector opening 4b is provided on a part of the outer peripheral wall of the bottom case 4 so that the connector mounted on the circuit board 59 faces the outside.

  The top cover 5 is attached to the bottom case 4 by screws. Specifically, as shown in FIG. 5, a plurality of through holes 13 through which the screws 12 pass are formed in the outer peripheral edge portion of the top plate portion 5 a of the top cover 5. Further, the side plate portions 5b on both sides are provided with a plurality of guide pieces 14 bent inward at substantially right angles. On the other hand, as shown in FIG. 3, a plurality of fixing pieces 15 bent at substantially right angles are provided on the outer peripheral edge of the bottom case 4, and the fixing pieces 15 penetrate the top cover 5. A screw hole 16 corresponding to the hole 13 is formed. In addition, a plurality of guide slits that omit details that prevent the plurality of guide pieces 14 of the top cover 5 from coming off are formed on both side surfaces of the bottom case 4.

  When attaching the top cover 5 to the bottom case 4, the top cover 5 is moved from the front side to the back side with the plurality of guide pieces 14 of the top cover 5 engaged with the plurality of guide slits of the bottom case 4. And slide. Thereby, the top plate part 5 a of the top cover 5 is in a state of closing the upper opening of the bottom case 4. In this state, the screw 12 is screwed into the screw hole 16 of the bottom case 4 through the plurality of through holes 13 of the top cover 5. The housing 3 shown in FIG. 2 is configured as described above.

  A front panel 18 having a substantially rectangular flat plate shape is attached to the front surface of the housing 3 as shown in FIG. The front panel 18 is provided with a rectangular disk insertion / removal port 19 through which the optical disk 2 is inserted and removed in the horizontal direction. That is, the optical disk 2 can be inserted into the housing 3 from the disk insertion / removal opening 19 or discharged from the disk insertion / removal opening 19 to the outside of the housing 3. The disk insertion / removal opening 19 is formed with panel curtains (not shown) on both sides in the direction orthogonal to the longitudinal direction. The panel curtain is made of non-woven fabric or the like cut into a long shape, and is adhered to the back side of the front panel 18 with an adhesive or the like, thereby preventing dust and the like from entering the housing 3 and optical discs. When the disk 2 is inserted and removed, it comes into sliding contact with the disk surface, whereby dust and the like attached to the optical disk 2 can be removed.

  Further, on the front surface of the front panel 18, a display unit 20 that lights and displays an access state with respect to the optical disc 2 and an eject button 21 that is pressed when the optical disc 2 is ejected are provided.

  A pair of guide protrusions 124 and 124 for sliding a slider 122 of a drive mechanism 120 (to be described later) along the one side surface are provided on the one side surface near one side surface of the bottom case 4 where the deck portion 4a is provided. It protrudes apart along the line (see FIG. 9).

  Further, as shown in FIGS. 3 and 4, the main chassis 6 is attached to the bottom surface of the bottom case 4 by screws. The main chassis 6 is disposed above the circuit board 59 so as to partition the inside of the bottom case 4 vertically at substantially the same height as the deck portion 4a. As a result, the housing 3 has a disk transport area in which the loading arm 51, the ejecting arm 52, and the deck arm 200 are pivotably exposed on the top cover 5 side from the main chassis 6, and the bottom case 4 side is driven from the main chassis 6. Arrangement of the drive mechanism 120 including the motor 121 and the slider 122, and the first and second link arms 54 and 55, the operation arm 58, and the loop cam 57 of the disk transport mechanism 50 that transmits the drive force of the drive motor 121 to the eject arm 52. It is the installation area.

  The main chassis 6 is made of a substantially flat plate-like sheet metal. The upper surface 6a covers the bottom case 4 from the back side of the bottom case 4 to one side surface where the deck portion 4a is formed, and the periphery of the upper surface 6a is the bottom case. 4 and a pair of side plate parts 6b bent along both side surfaces. Further, the main chassis 6 is formed with a base opening 6c and an eject arm opening 6d on the upper surface 6a so that the base unit 22 and the eject arm 52 of the disk transport mechanism 50 face the transport area of the optical disk 2, respectively. A side plate opening 6e through which the loading cam plate 53 connected to the slider 122 slid by the drive motor 121 is inserted is formed in the side plate portion 6b on the side where the deck portion 4a is provided.

  To the upper surface 6 a of the main chassis 6, on the bottom case 4 side, the eject arm 52 of the disk transport mechanism 50 that transports the optical disk 2 in and out of the housing 3 and the driving force of the drive mechanism 120 are transmitted to the eject arm 52. The operating arm 58 for operating the loop cam 57 and the loop cam 57 for guiding the movement of the second link arm 55 are locked. Further, the upper surface 6a is adjacent to the base unit 22 and has a side edge facing the disk insertion / removal port 19, a pickup part 90 provided in an eject arm 52 described later, and an edge part 17 on which the second pickup part 250 slides. Is done.

  The main chassis 6 has a side wall in the vicinity of the corner portion on the back side of the housing 3 to which the loop cam 57 is locked and on the other side surface on which the eject arm 52 and the first and second link arms 54 and 55 are provided. A locking portion 98 is formed in which a tension coil spring 56 that biases the eject arm 52 in the ejecting direction of the optical disk 2 via the first link arm 54 is locked.

  The main chassis 6 is provided with a plurality of guide pieces 6 f on the side plate portions 6 b on both sides, and through holes 6 g for fixing to the bottom case 4. On the other hand, screw holes 4c are formed in the bottom case 4 at positions corresponding to the through holes 6g, and the main chassis 6 is fixed by screwing screws into the screw holes 4c and the through holes 6g.

  Further, the main chassis 6 is formed with a centering guide opening 6h from which a guide piece 221 of a centering guide 220 described later is projected in the vicinity of the eject arm opening 6d.

  The disk drive device 1 includes a base unit 22 that constitutes a drive body on the bottom surface of the bottom case 4. As shown in FIG. 6, the base unit 22 has a base chassis 27 formed of a substantially rectangular frame body, and the base chassis 27 is supported by the sub chassis 29 via a plurality of dampers 28 a to 28 c. In the base unit 22, the base chassis 27 is disposed in the bottom case 4 via the sub-chassis 29, so that one end side in the longitudinal direction is positioned at the approximate center of the housing 3. The base unit 22 has, on one end side in the longitudinal direction, a disk mounting portion 23 on which the optical disk 2 inserted into the housing 3 from the disk insertion / removal port 19 is mounted, and the optical disk 2 mounted on the disk mounting portion 23. And a disk rotation drive mechanism 24 for rotating the disk. The base unit 22 also includes an optical pickup 25 that writes or reads signals to and from the optical disk 2 that is rotationally driven by the disk rotation drive mechanism 24, and the optical pickup 25 that transports the optical pickup 25 in the longitudinal direction. A pickup feeding mechanism 26 that feeds in the radial direction is provided, and these are integrally provided in the base chassis 27. The base unit 22 is moved up and down with respect to the optical disc 2 by a base lifting mechanism 150 (to be described later) integrally with the sub chassis 29 when the base chassis 27 is supported by the sub chassis 29.

  The base unit 22 faces the disk transport area from the base opening 6c of the main chassis 6 so that the disk mounting portion 23 is positioned substantially in the center of the bottom surface of the bottom case 4. The base unit 22 can be moved up and down by a base lifting mechanism 150, which will be described later. In the initial state, the base unit 22 is positioned below the optical disk 2 that is inserted into the housing 3 from the disk insertion / removal port 19. The optical disc 2 is rotated with the loading operation and engages the optical disc 2 in a rotatable manner. After the recording / reproducing operation, the base unit 22 is lowered by the base elevating mechanism 150 to be disengaged from the optical disc 2 and retracted from the transport area of the optical disc 2.

  The base chassis 27 is formed by punching a sheet metal into a predetermined shape and bending the periphery slightly downward. On the main surface of the base chassis 27, a substantially semicircular table opening 27a for facing a turntable 23a of a disk mounting portion 23 described later upward, and an objective lens 25a of an optical pickup 25 described later upward. A substantially rectangular pick-up opening 27b is continuously formed. As shown in FIG. 3, a decorative board 30 in which openings corresponding to the openings 27 a and 27 b are formed is attached to the upper surface of the base chassis 27.

  The base chassis 27 is formed with a guide plate 32 at the end opposite to the disk mounting portion 23 to prevent the optical disk 2 from contacting the base chassis 27 and guide the optical disk 2 to the support portion 88 of the eject arm 52. Yes. A fiber sheet (not shown) is affixed to the guide plate 32, and the signal recording surface of the optical disc 2 can be prevented from being damaged even when the optical disc 2 is slidably contacted.

  In the base chassis 27, connecting pieces 41a and 41b connected to the sub-chassis 29 via dampers 28a and 28b protrude from both side surfaces in the longitudinal direction. Each connecting piece 41a, 41b is continuous with the connecting pieces 45a, 45b formed in the subchassis 29, and is provided with an insertion hole 43 through which the stepped screw 42 is inserted.

  The disc mounting portion 23 has a turntable 23a that is rotationally driven by a disc rotation drive mechanism 24, and a chucking mechanism 33 for mounting the optical disc 2 is provided at the center of the turntable 23a. The chucking mechanism 33 includes an engaging protrusion 33a that engages with the center hole 2a of the optical disc 2, and a plurality of portions that lock the periphery of the center hole 2a of the optical disc 2 that is engaged with the engaging protrusion 33a. The optical disc 2 is held on the turntable 23a.

  The disk rotation drive mechanism 24 includes a flat spindle motor 24a that rotates the optical disk 2 integrally with the turntable 23a. The spindle motor 24a includes a turntable 23a provided on the upper surface portion of the table of the base chassis 27. It is attached to the lower surface of the base chassis 27 via a support plate 24b by screws so as to slightly protrude from the opening 27a for use.

  The optical pickup 25 condenses the light beam emitted from the semiconductor laser as the light source by the objective lens 25 a and irradiates the signal recording surface of the optical disc 2, and returns the light beam reflected by the signal recording surface of the optical disc 2. And an optical block that detects light by a light detector composed of a light receiving element or the like, and writes or reads a signal to or from the optical disc 2.

  The optical pickup 25 also drives an objective lens such as a biaxial actuator that drives the objective lens 25a in the optical axis direction (referred to as the focusing direction) and the direction orthogonal to the recording track of the optical disc (referred to as the tracking direction). Based on the detection signal from the optical disk 2 detected by the above-described photodetector, the objective lens 25a is displaced in the focusing direction and the tracking direction by the biaxial actuator on the signal recording surface of the optical disk 2. Further, drive control is performed such as a focus servo for focusing the objective lens 25a and a tracking servo for causing the spot of the light beam collected by the objective lens 25a to follow the recording track. As the objective lens driving mechanism, in addition to such focusing control and tracking control, the signal of the optical disc 2 is irradiated so that the light beam condensed by the objective lens 25a is irradiated perpendicularly to the signal recording surface of the optical disc 2. A triaxial actuator that can adjust the inclination (skew) of the objective lens 25a with respect to the recording surface may be used.

  The pickup feeding mechanism 26 includes a pickup base 34 on which the optical pickup 25 is mounted, a pair of guide shafts 35 a and 35 b that slidably support the pickup base 34 in the radial direction of the optical disc 2, and the pair of guide shafts 35 a, It has a displacement drive mechanism 36 for driving the pickup base 34 supported by 35b in the radial direction of the optical disc 2.

  Of the pair of guide shafts 35a and 35b, the pickup base 34 is formed with a pair of guide pieces 37a and 37b formed with a guide hole through which one guide shaft 35a is inserted, and a guide groove for sandwiching the other guide shaft 35b. The guide piece 38 is formed so as to protrude from the opposite side surfaces. As a result, the pickup base 34 is slidably supported by the pair of guide shafts 35a and 35b.

  The pair of guide shafts 35 a and 35 b are disposed on the lower surface of the base chassis 27 so as to be parallel to the radial direction of the optical disc 2, and the pickup base 34 that the optical pickup 25 faces from the pickup opening 27 b of the base chassis 27. Is guided over the inner and outer peripheries of the optical disc 2.

  The displacement drive mechanism 36 converts the rotational drive of the drive motor 31 attached to the base chassis 27 to linear drive via a gear or a rack (not shown), and the pickup base 34 is converted into a pair of guide shafts 35a and 35b. For example, a stepping motor provided with a lead screw is used for displacement driving in the radial direction of the optical disc 2.

  Next, the sub chassis 29 that supports the base chassis 27 via the dampers 28 will be described. The sub chassis 29 is moved up and down in accordance with the transport of the optical disk 2 by a base lifting mechanism 150 described later, thereby bringing the base chassis 27 close to or away from the optical disk 2. The sub-chassis 29 has substantially the same shape as the outer shape of the base chassis 27, is formed of a substantially rectangular frame body slightly larger than the base chassis 27, and is connected to the base chassis 27 so as to be integrated with the base chassis 27. The base unit 22 is configured. The sub chassis 29 is provided along the side surface where the guide shaft 35 a is provided, and a reinforcing chassis 44 that reinforces the sub chassis 29 is integrally attached. Further, the sub chassis 29 is formed with connecting pieces 45 a and 45 b to which the dampers 28 a and 28 b are attached and connected to the base chassis 27. The connecting piece 45a is provided on one side surface extending in the longitudinal direction and corresponding to the connecting piece 41a of the base chassis 27, and the connecting piece 45b is provided on the other side surface extending in the longitudinal direction on the connecting piece 41b of the base chassis 27. It protrudes at the end of the corresponding disk mounting portion 23 side.

  Note that the connecting piece of the base chassis 27 is connected to the reinforcing chassis 44 fixed to the sub-chassis 29 at the end opposite to the disk mounting portion 23 on the other side surface in the longitudinal direction. A connecting piece 45c is provided corresponding to 41c. As shown in FIG. 7, the connection pieces 45 a to 45 c are formed with insertion holes 46 that are continuous with the insertion holes 43 of the connection pieces 41 a to 41 c of the base chassis 27. Dampers 28a to 28c are attached to the connecting pieces 45a to 45c, respectively, and are connected to the connecting pieces 41a to 41c of the base chassis 27 via the dampers 28a to 28c, and stepped screws 42 are connected to the respective insertion holes 43. , 46 is inserted.

  Further, as shown in FIG. 6, the subchassis 29 is positioned on the side of the disk mounting portion 23 on the side facing the slider 122 described later, and is engaged with and supported by the first cam slit 130 of the slider 122. The first support shaft 47 and the second support shaft 48 that is positioned on the side of the disc mounting portion 23 on the side facing the sub-slider 151 and is supported by being engaged with the second cam slit 170 of the sub-slider 151. And a third support shaft 49 which is positioned on the front side of the side opposite to the side facing the slider 122 and is rotatably supported by the shaft hole 9 provided in the side plate portion 6b of the main chassis 6. And have.

  Therefore, in the sub chassis 29, the first support shaft 47 slides in the first cam slit 130 in conjunction with the sliding of the slider 122 and the sub slider 151, and the second support shaft 48 is the second support shaft 48. By sliding in the cam slit 170, the disk mounting portion 23 side is rotated about the third support shaft 49, and the base chassis 27 can be raised and lowered.

  Further, as shown in FIG. 3, the bottom case 4 is provided with a support that prevents the eject arm 52 from bending downward when the eject arm 52 described later rotates around the disc mounting portion 23. A pin 10 is erected. The support pin 10 is for preventing the optical disk 2 from colliding with the disk mounting portion 23 and being damaged when the eject arm 52 is bent downward. This support pin 10 is located in the vicinity of the disk mounting portion 23 of the base unit 22 and protrudes upward from the bottom surface portion of the bottom case 4, and is inserted through an insertion hole 30 a formed in the decorative plate 30 to convey the disk. It is on the area.

  The base unit 22 having such a configuration is moved up and down in the direction of arrow A and the direction of counter arrow A as shown in the schematic diagram of FIG. At this time, the base chassis 27 is supported only by the sub-chassis 29 through the dampers 28, and all the paths through which vibrations from the outside are transmitted go through the sub-chassis 29 with the dampers 28. Resistance to has been improved. Further, the base chassis 27 does not have an extra weight including the respective dampers 28, that is, the total weight as an object to which the shock is transmitted is light because there is no damper, so that further shock resistance is improved. The

  The disk drive device 1 may be fixed via a damper when the main chassis 6 is fixed to the bottom case 4. Specifically, as shown in FIG. 9, the main chassis 6 is provided with a damper 28 between each guide piece 6 f and the screw hole 4 c of the bottom case 4, and is fixed with a stepped screw.

  In the base unit 22 fixed in this way, as shown in the schematic diagram of FIG. 10, the sub chassis 29 is supported by the main chassis 6, and the main chassis 6 is fixed via the bottom case 4 and the damper 28. At this time, the base chassis 27 is supported only by the subchassis 29 via the dampers 28 a to 28 c, and the subchassis 29 is supported by the main chassis 6, and the main chassis 6 passes through the bottom case 4 and the damper 28. The path through which vibrations from the outside are transmitted passes through the main chassis 6 with the damper 28 and the subchassis 29 with the dampers 28a to 28c, and the damper is arranged in two stages. Therefore, the resistance to impact is further improved.

  Further, as shown in FIG. 9, a cushioning material 39 may be provided between the substantially intermediate portion of the side plate portion 6 b of the main chassis 6 and the bottom case 4. The shock absorber 39 is formed of an elastic member such as a thin rubber piece so that the side plate portion 6b and the bottom case 4 are in direct contact with each other according to the amplitude of vibration caused by the shock and cut off the path through which the shock is transmitted. The buffer material 39 has an adhesive layer formed on one surface, and this adhesive layer is attached to the side plate portion 6 b of the main chassis 6.

  Thereby, even when the clearance between the bottom case 4 and the main chassis 6 is narrowed and the main chassis 6 is connected to the bottom case 4 via the damper 28, the side plate portion 6b of the main chassis 6 can be 4 can be prevented from being transmitted to the main chassis 6 and the base chassis 27 through the contact portion.

  As shown in FIGS. 11 to 19, the disk drive apparatus 1 has the optical disk 2 mounted on the disk insertion / removal position where the optical disk 2 is inserted / removed from the disk insertion / removal port 19 and the turntable 23 a of the disk mounting unit 23. A disk transport mechanism 50 that transports the optical disk 2 to and from the disk mounting position is provided.

  The disk transport mechanism 50 is a surface parallel to the main surface of the optical disc 2 as a support member that is moved between the upper surface 6a of the main chassis 6 and the main surface of the top plate portion 5a facing the disk mounting portion 23. A loading arm 51 and an eject arm 52 that are swingable inside, a loading cam plate 53 that transmits a driving force from a drive mechanism 120 described later to the loading arm 51, and an eject arm 52 that is engaged with the eject arm 52. The first link arm 54 that rotates in the ejection direction of the optical disc 2, the second link arm 55 that is connected to the first link arm 54, and the first link arm 54 and the main chassis 6 are bridged. The tension coil spring 56 and the guide projection 113 of the second link arm 55 are engaged with each other so that the second link arm 5 and an operation arm 58 that is connected to the drive mechanism 120 to operate the first link arm 54 so that the eject arm 52 moves in the direction in which the optical disk 2 is inserted or ejected. ing.

  The disc transport mechanism 50 automatically pulls the optical disc 2 to the disc mounting portion 23 by the loading arm 51 when the eject arm 52 is rotated to a predetermined position by inserting the optical disc 2 from the disc insertion / removal port 19. The eject arm 52 is rotated to the front side of the housing 3 to eject the optical disk 2. Specifically, in the disk transport mechanism 50, the rotation support member 71 of the eject arm 52 is moved between the housing 3 and the eject arm 52 until the eject arm 52 is rotated to a predetermined position and the retracting operation is started after the optical disk 2 is inserted. The guide projection 113 formed on the distal end portion of the second link arm 55 is guided by the loop cam 57 so that the first link arm 54 of the rotation support member 71 is rotated. Movement of the first link arm 54 connected to the rotation support member 71 and the second link arm 55 is restricted by being moved in a direction different from the rotation direction of the engagement hole 80 with which the engagement is performed. Then, the tension coil spring 56 stretched between the first link arm 54 and the main chassis 6 is extended, and the eject arm 52 is moved in the discharging direction. While being urged is rotated in the insertion direction.

  Further, the disk transport mechanism 50 engages the first link arm 54 of the rotation support member 71 by the guide convex portion 113 of the second link arm 55 being guided by the loop cam 57 in the pull-in operation of the optical disk 2. By moving the engaging hole 80 in the same direction as the rotation direction, the extended tension coil spring 56 is contracted, and the urging force of the eject arm 52 in the discharging direction is reduced.

  Further, when the optical disc 2 is ejected, the disc transport mechanism 50 is configured such that when the guide convex portion 113 of the second link arm 55 is guided by the loop cam 57, the eject arm 52 is rotated in the ejecting direction of the optical disc 2. By moving in the same direction as the rotation direction of the engagement hole 80 with which the first link arm 54 of the rotation support member 71 is engaged, the eject arm 52 is rotated without the urging force of the tension coil spring 56 acting. Then, the optical disc 2 is ejected.

  As a result, in the insertion process in which the optical disk 2 is inserted to a predetermined position by the user, the tension coil spring 56 can be extended to exert a biasing force in the ejection direction, so that the insertion of the optical disk 2 by the user is stopped. Even in this case, it is possible to prevent the optical disk 2 from being left in a state where it is inserted in the housing 3 halfway. Further, in the process of retracting the optical disk 2 by the loading arm 51, the tension coil spring 56 contracts, so that the urging force acting on the eject arm 52 in the ejection direction can be eliminated, so that a smooth retracting operation is possible. Further, in the process of ejecting the optical disc, the tension coil spring 56 provided to the eject arm 52 is maintained by maintaining the state in which the first link arm 54 and the engaging portion of the main chassis 6 are close to each other and the tension coil spring 56 is contracted. Since the urging force in the ejecting direction due to is not exerted, the eject arm 52 is rotated according to the operation of the operation arm 58 that receives the driving force of the driving mechanism 120, and the optical disc 2 can be read without depending on the elastic force. The center hole 2a of the optical disc 2 can be stably discharged to a predetermined stop position where the center hole 2a is discharged out of the housing 3.

  Hereinafter, each component of the disk transport mechanism 50 will be described in detail.

The loading arm 51 pulls the optical disk 2 onto the disk mounting portion 23, and the base end portion of the loading arm 51 is rotatable on the deck portion 4 a of the bottom case 4 to the disk insertion / removal opening 19 side of the disk mounting portion 23. and supported by, the tip portion is rotatable in the arrow a ₁ direction and the arrow a ₂ direction in FIG. 11. Specifically, as shown in FIGS. 20 and 21, the loading arm 51 includes an arm main body 51a made of a flat sheet metal, and an insertion hole 60 projects from one end of the arm main body 51a. In FIG. 21, the optical disk 2 is loaded on the deck portion 4a with the rotation support member 63 as a fulcrum by engaging the substantially cylindrical rotation support member 63 projecting from the deck portion 4a. and it is rotatably supported in the arrow a ₁ direction and the arrow a ₂ direction in FIG. 21 to eject the optical disc 2.

The insertion hole 60 is formed in a long hole shape. Thus, the loading arm 51 is rotated in the drawing while moving in the arrow a ₁ direction and the arrow a ₂ along the insertion hole 60. As a result, as will be described in detail later, the loading arm 51 absorbs the deviation of the rotation timing that occurs between the loading arm 51 and the eject arm 52 in accordance with the stroke of the slider 122 in the insertion and withdrawal processes and the ejection process of the optical disk 2. Smooth insertion / ejection of the optical disk 2 can be performed.

  In addition, the loading arm 51 is provided with a contact portion 61 that protrudes upward from the tip of the arm main body 51a so as to be in contact with the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal port 19. A small diameter rotating roller 61a is rotatably attached to the contact portion 61. The contact portion 61 is made of a softer resin than the optical disc 2, and a central portion that comes into contact with the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal opening 19 is curved inward, and both end portions thereof are expanded in diameter. The flange portion has a substantially hourglass shape that restricts the movement of the optical disc 2 in the height direction.

Further, the loading arm 51 is pressed against the leaf spring 62 from the side near the insertion hole 60, so that the urging force of the leaf spring 62 always causes the insertion hole 60 to be a fulcrum, and the optical disc 2 is always on the disc insertion / removal port 19 side. are turn biased from into 21 arrow a ₁ direction for biasing the disk mounting portion 23 side. The leaf spring 62 that biases the loading arm 51 includes a base portion 62a fixed on the deck portion 4a and an arm portion 62b that extends from one end of the base portion 62a and biases the loading arm 51.

  Further, the loading arm 51 is provided with an engaging convex portion 64 that is inserted and engaged with a first cam groove 66 of a loading cam plate 53 described later. The loading arm 51 is rotated while restricting the urging force of the leaf spring 62 by the engagement convex portion 64 moving along the first cam groove 66 of the loading cam plate 53.

  The loading cam plate 53 is made of a flat metal plate, and is engaged with a slider 122 of a drive mechanism 120 described later, so that the loading cam plate 53 is moved back and forth on the deck portion 4a as the slider 122 moves. A regulating arm 212 that regulates the urging force of the loading arm 51 and the deck arm 200 described later is rotated. The loading cam plate 53 is overlaid on the loading arm 51 and the restriction arm 212 that are rotatably supported on the deck portion 4 a, and the engaging convex part 64 of the loading arm 51 and the rotation guide of the restriction arm 212. When the portion 215 is inserted, the rotation of the loading arm 51 and the regulating arm 212 is regulated according to the insertion / ejection operation of the optical disc 2.

  As shown in FIGS. 22A and 22B, the loading cam plate 53 includes a first engaging projection 64 projecting from the loading arm 51 and a rotation guide portion 215 of the restricting arm 212. A cam groove 66, a second cam groove 67 through which the guide protrusion 65 protruding from the deck portion 4 a is inserted, a pair of engagement protrusions 68 and 68 that engage with the slider 122, and a restriction arm 212. A third cam groove 69 is formed on the deck portion 4a. The third cam groove 69 is inserted through a rotation support pin 217 that is rotatably supported.

  The first cam groove 66 regulates the rotation of the loading arm 51 urged in the loading direction of the optical disc 2 by the leaf spring 62 by sliding the engagement convex portion 64, and the rotation guide portion. By sliding 215, the regulating arm 212 is rotated to control the urging force of the coil spring 203 locked to the deck arm 200.

As shown in FIGS. 11 and 21, the first cam groove 66 restricts the engaging convex portion 64 to rotate the loading arm 51 in the direction of the arrow a _{1 in} FIG. A first guide portion 66a, a second guide portion 66b adjacent to the first guide portion 66a and continuously formed to restrict the rotation position of the loading arm 51 and support the optical disc 2 at the centering position; second guide portions 66b and engagement is formed continuously convex portions 64 the loading arm 51 is guided to rotate in FIG. 11 in the arrow a ₂ direction away from the outer peripheral of the optical disc 2 mounted on the disk mounting portion 23 A regulation arm is provided by guiding a rotation guide portion 215 provided on the opposite side of the second guide portion 66b via the third guide portion 66c and the first guide portion 66a. 212 consists of a fourth guide portion 66d for rotating the.

The first guide portion 66 a is formed in a direction substantially orthogonal to the moving direction of the loading cam plate 53, and is engaged when the loading cam plate 53 is moved in the direction of arrow f ₁ on the back side in the housing 3. It abuts the protrusion 64 and the front side to rotate the loading arm 51 in FIG. 11 in the arrow a ₁ direction. The second guide portion 66b is moved direction substantially parallel to the loading cam plate 53, the rotation of the first guide portion 66a the loading arm 51 is rotated in the arrow a ₁ direction to draw the optical disc 2 by The optical disc 2 is centered by regulation. The third guide portion 66c is bent toward the inner peripheral side of the housing 3 with respect to the second guide portion 66b, and the loading arm 51 is mounted on the disc mounting portion 23 by guiding the engaging convex portion 64. The optical disk 2 can be rotated by being separated from the side surface of the optical disk 2. The fourth guide portion 66d guides the rotation guide portion 215 of the restriction arm 212. The fourth guide portion 66d rotates the restriction arm 212 in accordance with the sliding of the loading cam plate, and applies a biasing force by the deck arm 200 described later. Control.

As shown in FIG. 11, the first cam groove 66 is separated from the first guide portion 66a and the engaging convex portion 64 in the state of waiting for the insertion of the optical disc 2, and the leaf spring 62 moves in the direction of the arrow a1. The engaging convex portion 64 of the loading arm 51 that is urged to rotate is in contact with the side surface facing the first guide portion 66a. As a result, the loading cam plate 53 attempts to position the loading arm 51 in the waiting state for inserting the optical disk 2. When the optical disk 2 is inserted into the housing 3 and the loading cam plate 53 is moved to the back side of the housing 3 by the slider 122, the first cam groove 66 has the engagement convex portion 64 as shown in FIG. There is in contact with the first guide portion 66a, rotates the loading arm 51 to FIG. 14 in the arrow a ₁ direction in retraction of the optical disc 2.

When the first cam groove 66 is conveyed until the center hole 2a of the optical disc 2 is positioned on the turntable 23a of the disc mounting portion 23, the engaging convex portion 64 is provided with the second guide as shown in FIG. Part 66b is entered. The loading arm 51, since the relative angle between the second guide portion engaging portion 64 and the insertion hole 60 in 66b unchanged, abutment 61 will no longer be rotated in the arrow a ₁ direction, the optical disc 2 centering position To support. Thereafter, when the chucking of the optical disk 2 is completed, the first cam groove 66 has the engaging convex part 64 guided by the third guide part 66c as shown in FIG. in Figure 16 is rotated in the arrow _{a 2} direction.

  Further, the first cam groove 66 swings when the loading cam plate 53 is moved to the back side of the housing 3 and the rotation guide portion 215 of the restriction arm 212 is guided by the fourth guide portion 66d. Then, the biasing force increases as the optical disk 2 is inserted into the housing 3 by moving the spring latching portion 214 that latches the other end 203b of the coil spring 203 that pivots and biases the deck arm 200. Prevent it from going.

During ejection of the optical disk 2, the slider 122 is the loading cam plate 53 with the be moved to the direction of arrow f ₂ is a front side is moved in the same direction, as shown in FIG. 17, the engaging projection 64 is The third guide part 66c moves to the second guide part 66b. Thus, the loading arm 51 is pivoted in 17 arrow a ₁ direction is the loading direction of the optical disc 2, the contact portion 61 is in contact from the side and the front side of the optical disc 2.

Moved further loading cam plate 53 to the direction of arrow f _2, the engaging portion 64 is moved from the second guide portion 66b to the first guide portion 66a, the loading arm 51 as shown in FIG. 18, abutment 61 is allowed to rotate in the arrow a ₂ direction as the first guide portion 66a is moved in the direction of arrow f _2. Further, the eject arm 52 is rotated in the direction of the arrow b ₂ for ejecting the optical disc 2 by receiving the driving force of the driving mechanism 120. The loading arm 51 therefore, will be rotated in the arrow a ₂ direction by being pressed to the optical disk 2 to be conveyed to the discharge direction.

The loading arm 51 at this time, will be rotated while being urged in the arrow a ₁ direction is an insertion direction of the optical disk 2 by the leaf spring 62. Thus, when the optical disc 2 is ejected, the disc transport mechanism 50 pushes the optical disc 2 to the predetermined ejection position while holding the optical disc 2 by the loading arm 51 and the eject arm 52, and the loading arm 51 suddenly removes the optical disc 2. Jumping out can be prevented.

When the ejection of the optical disk 2 is completed, the loading arm 51 has a side surface in which the engaging convex portion 64 faces the first guide portion 66a of the first cam groove 66 of the loading cam plate 53, as shown in FIG. by being locked in, it is regulated rotation of the arrow a ₁ direction to wait for insertion of the optical disc 2.

  The second cam groove 67 guides the movement of the loading cam plate 53 by being inserted into a guide convex portion 65 protruding from the deck portion 4a. The second cam groove 67 is a linear cam groove parallel to the moving direction of the slider 122, and the guide convex portion 65 slides with the movement of the slider 122, so that the loading cam plate 53 is moved to the slider 122. Guide in the direction of movement.

  A pair of engaging protrusions 68, 68 that engage with the slider 122 are formed on one side of the loading cam plate 53 so as to be separated from each other. The engaging protrusions 68 and 68 project downward and project toward the bottom surface side of the bottom case 4, thereby engaging the slider 122 disposed along the side surface of the bottom case 4. Engaged with the mating recesses 127 and 127. As a result, the loading cam plate 53 and the slider 122 are integrated, and the loading cam plate 53 is slid as the slider 122 moves.

  The loading cam plate 53 is slidable within a clearance provided between the right guide wall 118 and the deck portion 4a on the other side opposite to the one side where the engagement protrusions 68 and 68 are formed. By being inserted, the floating from the deck portion 4a is prevented.

  The third cam groove 69 is inserted on a rotation support pin 217 that stands on the deck portion 4a and supports the restriction arm 212 to the deck portion 4a so as to be rotatable. Similarly to the second cam groove 67, the third cam groove 69 is a linear cam groove parallel to the moving direction of the slider 122, and is slid to the rotation support pin 217 as the slider 122 moves. Thus, the loading cam plate 53 is guided in the moving direction of the slider 122.

An eject arm 52 for discharging the optical disk 2 from the disk mounting portion 23 to the outside of the disk insertion / removal opening 19 is a side surface opposite to the side surface on which the loading arm 51 is formed, and is on the rear side of the housing 3 from the disk mounting portion 23. It is arranged. Then, the eject arm 52 conveys the optical disc 2 in the direction of arrow b _{1 in} FIG. in Figure 11 to eject the disk slot 19 side is rotated in the arrow b ₂ direction. As shown in FIGS. 23 and 24, the eject arm 52 includes a rotation support member 71 that is rotatably supported by the main chassis 6, and an extrusion that is rotatably engaged with the rotation support member 71 to push out the optical disk 2. An arm 72 and a coil spring 73 that urges the pushing arm 72 in the ejection direction of the optical disc 2 are provided.

  The rotation support member 71 is made of a substantially circular sheet metal, and is rotatably attached to the upper surface 6a of the main chassis 6 from the opposite side of the upper surface 6a to the disk transport area. An attachment port 71b with the main chassis 6 is formed in the approximate center of the main surface 71a of the rotation support member 71. A spacer 75 is disposed between the rotation support member 71 and the main chassis 6, and the rotation support member 71 is rotatably attached to the main chassis 6 via the spacer 75.

  Further, the rotation support member 71 is formed with an engagement piece 76 with which the push arm 72 and the coil spring 73 are engaged. The engagement piece 76 is bent from the tip of the standing wall 76a that is erected from the main surface 71a, so that it is provided above the main surface 71a, and the upper surface 6a from the ejection arm opening 6d of the main chassis 6 is provided. Projected to the side. The engaging piece 76 is pushed out by contacting the side surface of the pushing arm 72 with an opening 77 that is continuous with the engaging convex portion 85 of the pushing arm 72 and is swiveled together by a caulking shaft 89. A pair of rotation restricting walls 78 and 78 for restricting the rotation region of the arm 72 and a locking recess 79 for locking one arm 73b of the coil spring 73 are formed. The rotation restricting walls 78 and 78 are formed so as to rise from both the left and right sides of the engaging piece 76, and a restricting projection 87 formed on the pusher arm 72 is disposed therebetween to restrict the turning region of the pusher arm 72. To do.

  Further, the rotation support member 71 has an engagement hole 80 in which a first link arm 54 described later is rotatably engaged with the main surface 71a. The engagement hole 80 communicates with an insertion hole formed at one end 54 a of the first link arm 54, and is rotatably connected to the first link arm 54 by a screw 74.

Further, the rotation support member 71 has a bent piece 81 formed from one side surface of the main surface 71a. The bent piece 81 is bent downward from the main surface 71a, so that the bent piece 81 abuts against a sub-slider 151 of the base lifting mechanism 150, which will be described later, and the optical disc 2 is inserted into the disc by inserting the optical disc 2. It presses the switch of the first switch SW1 mounted on the circuit board 59 when it is rotated 11 in the arrow b ₁ direction to convey the mounting section 23 side. As a result, the disk drive device 1 can detect that the eject arm 52 pressed against the optical disk 2 has been rotated to the back side of the housing 3, and can detect the timing for driving the drive mechanism 120.

  Further, the rotation support member 71 is provided with a turning piece 82 for turning a centering guide 220 (to be described later) away from the side surface of the optical disc 2 conveyed to the disc mounting portion 23. When the optical disc 2 is transported to a centering position where the optical disc 2 can be mounted on the disc mounting portion 23, the rotation support member 71 is rotated to contact the cam shaft 233 of the centering guide 220 and the centering guide. 220 is rotated so as to be separated from the optical disc 2 so that the optical disc 2 is rotatable.

  The push-out arm 72 that is rotatably engaged with the engagement piece 76 is a resin molded member formed in a substantially triangular shape, and an engagement convex portion into which the opening 77 of the engagement piece 76 is inserted and engaged. 85, a locking wall 86 that locks the other arm 73 c of the coil spring 73, and a support portion 88 that supports the side surface on the insertion end side of the optical disc 2. The engagement convex portion 85 is a hollow cylindrical body formed at the top of a substantially triangular shape, and the hollow portion communicates with an opening 77 formed in the engagement piece 76 of the rotation support member 71. The coil spring 73 is inserted into the cylindrical portion 73 a and is co-caulked to the engaging piece 76 by the caulking shaft 89. As a result, the push arm 72 is rotatable on the engaging piece 76 with the engaging convex portion 85 as a fulcrum.

  The coil spring 73 engaged with the engaging piece 76 together with the pushing arm 72 by the caulking shaft 89 has a cylindrical portion 73 a inserted through the engaging convex portion 85 and one arm 73 b formed on the engaging piece 76. The other arm 73c is locked to the recess 79, and the other arm 73c is locked to the locking wall 86 formed on the pusher arm 72. It is urged to rotate in the ejecting direction of the optical disc 2 with the convex portion 85 as a fulcrum.

  Further, the pushing arm 72 is formed with a restricting protrusion 87 in the vicinity of the engaging convex portion 85 for determining a rotation region on the engaging piece 76. The restricting protrusion 87 is positioned between the rotation restricting walls 78 and 78 provided upright on the engaging piece 76, and the push arm 72 is turned on the engaging piece 76, whereby the restricting protrusion 87 is interposed between the turning restricting walls 78. Will be reciprocated. Accordingly, the pushing arm 72 is restricted from turning when the restricting protrusion 87 is brought into contact with any one of the turning restricting walls 78, so that the turning region on the engaging piece 76 is determined. .

Such an extrusion arm 72 is rotatably engaged with the rotation support member 71 and is urged to rotate toward the disc insertion / removal port 19 by a coil spring 73 with a predetermined spring force. Eject arm 52 thus is operated to rotate the optical disc 2 in FIG. 25 in the arrow b ₂ direction to discharge into the housing 3 out by the first link arm 54 and the operating arm 58 which receives the driving force of the driving mechanism 120 described later When a force in the direction of the arrow b ₁ is applied due to an obstacle on the transport area of the optical disk 2, the push arm 72 receiving the force in the direction opposite to the ejection direction of the optical disk 2 is against the biasing force of the coil spring 73 is rotated an opening 77 in the arrow b ₁ direction as a fulcrum of the rotation support member 71. Thus the driving force for rotating the eject arm 52 in the arrow b ₂ direction, and a force acting in a direction opposite to the driving force to avoid a situation where the opposing. Therefore, without applying an excessive load to the eject arm 52 to a motor or the like of the first link arm 54 and the drive mechanism 120 for driving the operating arm 58 so as to rotate to 25 in the arrow b ₂ direction, the optical disc 2 In addition, it is possible to prevent damage by being pinched by the urging force in the ejection direction by the eject arm 52 and the force acting in the opposite direction.

  Further, as shown in FIGS. 23 and 24, the push-out arm 72 is provided with a pickup portion 90 that prevents the optical disc 2 from sinking to the bottom case 4 side, as shown in FIGS. The pickup unit 90 includes a pickup arm 91 that supports the optical disk 2 from below, and a pressing member 92 that presses the pickup arm 91 so that the optical disk 2 can be caught.

  The pickup arm 91 includes a rod-shaped shaft portion 91a, a support piece 91b provided on one end side of the shaft portion 91a and supporting the optical disc 2, and an optical disc 2 standing in the vicinity of the support piece 91b and inserted into the housing 3. The abutting piece 91c with which the outer peripheral surface is abutted, and the upper end 6a of the main chassis 6 is slid along the rotation of the eject arm 52 provided at the other end of the shaft portion 91a, and the support piece 91b rises on the shaft portion 91a. And a sliding piece 91d that rotates in the direction.

  The shaft portion 91a is formed in a substantially columnar shape, and a support piece 91b and an abutting piece 91c project from one end side, and a sliding piece 91d projects from the other end side. The shaft portion 91a is rotatably supported by a bearing portion 94 formed on the push-out arm 72. The support piece 91b supports the outer peripheral portion on the insertion end side of the optical disc 2 inserted with an inclination toward the bottom case 4 side, thereby preventing a collision with the optical pickup 25 and the like and returning it to a regular transport region. Yes, it is formed in a substantially rectangular plate shape, is thinned toward the front end side in the longitudinal direction, and is provided with an inclined surface. When the abutting piece 91 c is abutted against the outer peripheral surface of the optical disc 2, the rotation of the shaft portion 91 a is restricted by being supported by the support wall 99 erected on the push-out arm 72. Further, the abutting piece 91c is erected in a direction substantially orthogonal to the extending direction of the support piece 91b from the shaft portion 91a, and when the support piece 91b is supported by the support wall 99, the support piece 91b becomes a normal one of the optical disc 2. It is rotated on the transfer area. The sliding piece 91d protrudes from the shaft portion 91a so as to face the lower surface side of the pushing arm 72 from the opening 95 bored in the pushing arm 72. Then, the sliding piece 91 d slides on the upper surface of the main chassis 6 to rotate and hold the support piece 91 b to the regular transport area of the optical disc 2.

  Further, pressed portions 93 and 93 that are pressed by the pressing member 92 are formed on the shaft portion 91a. The pressed portions 93 and 93 are flattened by providing the shaft portion 91a with a substantially D-shaped cross section, and are pressed by a pressing member 92 formed in a flat plate shape. The pressing member 92 that presses the pressed portions 93, 93 is a leaf spring member formed in a substantially U shape, and is attached to the pushing arm 72 so that the support piece 91 b of the pickup arm 91 is always downward. The shaft portion 91a is urged to rotate so as to be inclined. At this time, the pressing member 92 presses the flat portions of the pressed portions 93 and 93 having a substantially D-shaped cross section, so that the pickup arm 91 is securely rotated so that the support piece 91b faces downward. Can be energized. Further, as a result, the sliding piece 91 d of the pickup arm 91 protrudes from the opening 95 formed in the pushing arm 72 to the lower surface side of the pushing arm 72, and the pushing arm 72 is rotated to the back side of the housing 3. It can be brought into contact with the edge portion 17 of the main chassis 6.

  In the state where the pickup arm 91 is waiting for the insertion of the optical disc 2, the ejecting arm 52 is rotated to the front side of the housing 3, so that the sliding piece 91 d is the edge portion 17 of the main chassis 6. The support piece 91b is inclined downward by being separated from each other and the shaft portion 91a is urged by the pressing member 92. When the optical disc 2 is inserted, the outer peripheral surface of the optical disc is abutted against the abutting piece 91c, whereby the shaft portion 91a is rotated against the urging force of the pressing member 92, and the support piece 91b is the top cover. Raised to the 5th side. As a result, the pickup arm 91 is rotated to the rear side of the housing 3 while supporting the lower surface side of the optical disc 2 by the support piece 91b. Thereafter, when the push-out arm 72 rotates on the upper surface of the main chassis 6, the pick-up arm 91 has a sliding piece 91 d that faces the lower side of the push-out arm 72 through the opening 95 on the upper surface 6 a from the edge portion 17 of the main chassis 6. Is held in a state where the support piece 91b is raised to the top cover 5 side. Accordingly, even when the push arm 72 is separated from the optical disk 2 after the optical disk 2 is transported to the disk mounting portion 23, the support piece 91 b is rotated to the bottom case 4 side by the biasing force of the pressing member 92, and the main chassis 6. There is no sliding on the upper surface of the.

  Further, when the insertion end of the optical disc 2 is inclined and inserted toward the bottom case 4, the outer periphery on the insertion end side of the optical disc 2 is placed on the support piece 91 b that is rotated toward the bottom case 4 in the insertion standby state. Since the surface is supported, it is possible to prevent the optical disk 2 from colliding with other components such as the turntable 23a and the optical pickup 25 disposed on the bottom case 4 side.

When the optical disk 2 is gradually inserted in a state of being inclined by the eject arm 52 and the push-out arm 72 is rotated in the arrow b ₁ direction, the pickup arm 91, sliding piece 91d edge portion of the main chassis 6 The shaft portion 91a is rotated against the urging force of the pressing member 92 by sliding contact with the pressing member 92, and the support piece 91b is rotated toward the top cover 5 side. Note that the rotation region of the support piece 91 b is restricted by the abutting piece 91 c provided on the shaft portion 91 a being supported by the support wall 99 provided upright on the push-out arm 72. Further, by rotating the support piece 91b, the outer peripheral portion of the optical disc 2 is abutted against the abutting piece 91c. As a result, the pickup arm 91 can return the optical disc 2 inserted with an inclination toward the bottom case 4 side to the regular transport area.

  In the push-out arm 72, a holding piece 88 is provided in the vicinity of the support piece 91b of the pickup arm 91 so as to hold the outer peripheral portion of the optical disc 2 together with the support piece 91b. The holding piece 88 extends in the same direction as the support piece 91b from the end of the standing wall provided upright from the main surface of the push arm 72. The pushing arm 72 receives the side surface on the insertion end side of the optical disc 2 by the standing wall of the abutting piece 91c and the sandwiching piece 88, and sandwiches the insertion end side of the optical disc 2 by the sandwiching piece 88 and the support piece 91b. The optical disk 2 is rotated to the back side of the housing 3 when retracted, and pushed out to the front side of the housing 3 when ejected.

The distance between the holding piece 88 and the support piece 91b rotated to the regular transport area is formed slightly larger than the thickness of the optical disc 2, and does not firmly hold the optical disc 2. Eject arm 52 thus serves to prevent the inclination of the optical disc 2 by the holding pieces 88 and the support piece 91b with the rotation in the arrow b ₁ direction and the b ₂ direction, the optical disc 2 is released smoothly, clamping during discharge can do.

  Moreover, you may form the extrusion arm concerning the eject arm 52, and a pick-up part as follows.

As shown in FIGS. 26 and 27, the second push arm 240 has an opening formed in the engagement piece 76 of the rotation support member 71 in the same manner as the push arm 72 attached to the eject arm 52. with pivotally mounted parts 77, in FIG. 26 is rotationally biased in the arrow b ₂ direction, which is the discharge direction of the optical disc 2 by the coil spring 73. The second extrusion arm 240 is a resin molded member formed in a substantially triangular shape, and a pickup support portion 241 provided with a second pickup portion 250 on the opposite side to the top portion supported by the engagement piece 76; A clamping piece 245 that clamps the side surface on the insertion end side of the optical disc 2 is formed together with the pickup arm 251 of the second pickup unit 250.

  The pickup support portion 241 includes a storage recess 242 that rotatably stores the pickup arm 251, and a locking portion 244 that locks the support plate 243 that supports the pickup arm 251 in the storage recess 242. The storage recess 242 is provided along one side of the second push-out arm 240 according to the rod-shaped pickup arm 251 and intermittently supports the upper portion of the pickup arm 251 along the longitudinal direction. In addition, the locking portion 244 locks the support plate 243 from the back side of the storage recess 242 to the pickup support portion 241 by locking a plurality of locking pieces 243 b formed on the support plate 243.

  The support plate 243 is engaged with the pickup support portion 241 from the back surface side of the second push-out arm 240, thereby rotatably supporting the pickup arm 251 on the pickup support portion 241. As shown in FIG. 28, the support plate 243 is engaged with a storage portion 243a for forming a metal plate in a substantially concave shape and storing the pickup arm 251 and a plurality of locking portions 244 provided on the pickup support portion 241. A plurality of locking pieces 243b to be stopped are provided. The support plate 243 stores the pickup arm 251 in the storage portion 243a and the locking piece 243b is locked to the locking portion 244, thereby preventing the support plate 243 from falling off the pickup support portion 241. The support plate 243 is provided with a locking hole 243c for restricting the rotation range of the pickup arm 251. A locking projection 257 projecting from the pickup arm 251 is inserted into the locking hole 243c, and the locking surface 257a of the locking projection 257 is locked, whereby the support portion 254 of the pickup arm 251 is locked. The rotation range can be determined.

  The sandwiching piece 245 sandwiches the outer peripheral portion of the optical disc 2 together with the pickup arm 251 in the same manner as the sandwiching piece 88 of the push-out arm 72 described above, and stands upright from the main surface of the second push-out arm 240. It is formed so as to protrude from the tip in the same direction as the support portion 254 of the pickup arm 251.

  As shown in FIGS. 26 and 27, the second pickup unit 250 includes a pickup arm 251 and a coil spring 252 that urges the pickup arm 251 to rotate. The pickup arm 251 supports the outer peripheral portion of the optical disk 2 inserted obliquely, prevents collision with the optical pickup 25 and the like, and guides it to a regular transport area. FIGS. ), A columnar arm main body 253, a support portion 254 formed at the tip of the arm main body 253 and supporting the outer peripheral portion of the optical disc 2, and an upper surface 6a of the main chassis 6 formed at the rear end of the arm main body 253. , A sliding portion 255 that rotates the arm body 253, a spring locking portion 256 that protrudes from the outer periphery of the arm main body 253, and engages one end of the coil spring 252, and protrudes from the outer periphery of the arm main body 253. And a locking projection 257 inserted through the locking hole 243c of the support plate 243.

  The arm body 253 is housed in a housing recess 242 provided in the second push-out arm 240 and is rotatably held by a housing portion 243a of the support plate 243. On the outer periphery of the arm main body 253, a spring locking portion 256 and a locking protrusion 257 are projected.

  The support portion 254 formed at the distal end of the arm body 253 is formed in a flat plate shape as a whole, and is formed in an acute angle toward the distal end in a side view as shown in FIG. The support unit 254 is supported with the main surface 254 a standing in a substantially orthogonal direction with respect to the main surface of the optical disc 2 in a state of waiting for the optical disc 2 to be inserted. At this time, the support portion 254 can support the side surface on the insertion end side of the optical disc 2 when the main surface 254a is inclined toward the bottom case 4 and the optical disc 2 is inclined toward the bottom case 4.

The sliding portion 255 formed at the rear end of the arm main body 253 is configured such that a standing wall having a curved surface is erected from the arm main body 253. The sliding portion 255, as shown in FIG. 29 (c), the side surface of the side curved surface that contacts the edge portion 17 of the main chassis 6 when the eject arm 52 is rotated in the arrow b ₁ direction is a 255a, abuts against the edge portion 17 of the main chassis 6 rotates the arm main body 253 and the support 254 by the eject arm 52 is rotated in the arrow b ₁ direction. When the sliding portion 255 comes into contact with the main chassis 6 and the arm main body 253 rotates, the main surface 254a of the support portion 254 that has been rotated in a direction substantially orthogonal to the main surface of the optical disc 2 is the main surface of the optical disc 2. It becomes almost parallel.

  The coil spring 252 that urges the pickup arm 251 to rotate is inserted into the winding portion by the arm main body 253, one end is locked to the main surface portion of the second push-out arm 240, and the other end is the arm of the pickup arm 251. It is latched by a spring latching portion 256 provided on the main body 253. One end of the coil spring 252 is locked to the push-out arm 240 and the other end is locked to the spring locking portion 256 of the pickup arm 251 to urge the pickup arm 251 to rotate.

  The pick-up arm 251 has an arm main body 253 housed in the housing recess 242 of the second push-out arm 240 and a catching projection in the catch hole 243c of the support plate 243 attached from the back side of the second push-out arm 240. By inserting the portion 257, the pickup support portion 241 of the second push-out arm 240 is supported. At this time, in the pickup arm 251, the main surface 254 a of the support portion 254 is substantially orthogonal to the main surface of the optical disc 2 by the spring locking portion 256 biased by the coil spring 252 being brought into contact with the main surface of the support plate 243. Is held upright. As shown in FIG. 30, the support unit 254 waits for insertion of the optical disc 2 in a state where the main surface 254a is inclined toward the bottom case 4 side.

The second extrusion arm 240, the optical disc 2 is inserted into the housing 3, in contact side of the insertion end side of the optical disc 2 to standing walls holding piece 245 is provided is equivalent, rotated in the arrow b ₁ direction It will be done. At this time, as shown in FIG. 31, when the tip of the optical disc 2 is inserted while being inclined toward the bottom case 4, the tip of the optical disc 2 is supported by the support portion 254. Therefore, even when the optical disc 2 is inserted while being inclined toward the bottom case 4, the outer peripheral portion of the optical disc 2 collides with the turntable 23 a of the base unit 22 disposed on the bottom case 4, the optical pickup 25, or the like. Can be prevented. The optical disc 2 is guided by the main surface 254a of the support portion 254, whereby the outer peripheral portion on the insertion end side is moved to the regular transport region.

When the eject arm 52 in a state where the optical disc 2 is supported by the supporting portion 254 is rotated in the arrow _{b 1} direction, the pickup arm 251, the curved surface 255a of the sliding portion 255 and the edge portion 17 of the main chassis 6 equivalents As a result of the contact, the arm body 253 is rotated against the urging force of the coil spring 252. As a result, as shown in FIG. 32, the support portion 254 is rotated from a state where the main surface stands in a direction substantially orthogonal to the main surface of the optical disc 2 to a state substantially parallel to the main surface of the optical disc 2, and is inserted at an angle. The optical disk 2 is guided to the regular conveyance area, and the optical disk 2 is held together with the holding pieces 245 erected on the second push-out arm 240.

In the pull-step optical disk 2, the eject arm 52 is further rotated in the arrow b ₁ direction, the pickup arm 251, the sliding portion 255 slides on the upper surface 6a of the main chassis 6, the supporting portion 254 is an optical disk The second main surface is moved while being maintained in a state substantially parallel to the main surface. Accordingly, the pickup arm 251 is rotated to the back side of the housing 3 when inserted and retracted while sandwiching the optical disc 2 together with the sandwiching piece 245, and pushes the optical disc 2 to the front side of the housing 3 when ejected.

The distance between the sandwiching piece 245 and the support portion 254 rotated to the regular transport area is formed slightly larger than the thickness of the optical disc 2 and does not firmly hold the optical disc 2. Eject arm 52 thus serves to prevent the inclination of the optical disc 2 by the holding pieces 245 and the support portion 254 with the rotation in the arrow b ₁ direction and the b ₂ direction, the optical disc 2 is released smoothly, clamping during discharge can do.

Next, the first link arm 54 that is rotatably engaged with the rotation support member 71 of the eject arm 52 will be described. The first link arm 54 rotates the eject arm 52 in the direction of the arrow b ₁ or the arrow b _{2 in} FIG. It is. The first link arm 54 is made of a metal plate formed in a substantially rectangular shape, and one end 54a in the longitudinal direction is rotatably engaged with the engagement hole 80 of the rotation support member 71, and the other end in the longitudinal direction. 54b is rotatably engaged with the second link arm 55, and the other end is formed with a locking portion 96 to which one end of the tension coil spring 56 spanned between the main chassis 6 is locked. The other end 58b of the operation arm 58 is attached to a substantially middle portion in the longitudinal direction.

  The first link arm 54 may be engaged with the urging coil spring 97 between the loop cam 57 and the first link arm 54. The biasing coil spring 97 is provided in the case where the power of the slider 122 is not sufficiently transmitted as the rotational force to the rotation support member 71 of the eject arm 52 through the first link arm 54 in the ejecting process of the optical disc 2. Yes, the eject arm 52 is rotated to the ejection position of the optical disk 2.

One end of the urging coil spring 97 is locked to the loop cam plate 111 of the loop cam 57, and the other end is attached to a substantially middle portion of the first link arm 54. Thus, the biasing spring 97, in the discharging process of the optical disc 2, to rotate biasing the rotary support member 71 in FIG. 19 in the arrow b ₂ direction via the first link arm 54. Therefore, the eject arm 52 can transport the optical disc 2 to a predetermined ejection position. In the present disk transport mechanism 50, the urging coil spring 97 is not essential and is used preliminarily. Disk transfer mechanism 50 is generally by the eject arm 52 in response to the sliding movement of the slider 122 rather than the urging force of the urging spring 97 is rotated in the arrow b ₂ direction, conveys the optical disc 2 to a predetermined discharge position Is.

A tension coil spring 56 that is locked to a locking portion 96 formed at the tip of the first link arm 54 moves the eject arm 52 through the first link arm 54 in the direction in which the optical disk 2 is ejected. b Energizing force in the ejection direction is applied to the eject arm 52 when the optical disk 2 is inserted by urging the rotation in the _two directions. That is, the eject arm 52 by the optical disc 2 is inserted, is rotated in the arrow b ₁ direction, the first link arm 54 is connected to the rotary support member 71, one end 54a is likewise arrow b It is rotated in _one direction. At this time, the tension coil spring 56 locked to the locking portion 96 of the first link arm 54 is engaged with the other end locked to the locking portion 98 of the main chassis 6 and the first link arm 54. One end locked to the stopper 96 is separated and extended. Thus, the eject arm 52 pulls the arrow b ₁ one end 54a and the rotation support member 71 being engaged with the first link arm 54 of the first link arm 54 by the urging force of the coil spring 56 is rotating direction since the direction is pulled back in the opposite direction, the urging force of the arrow b ₂ direction, which is the discharge direction of the optical disc 2 at a predetermined force is applied.

Thus, the disc drive apparatus 1, the user when inserting the optical disk 2, it is possible to perform the insertion of the optical disc 2 while applying a biasing force opposite arrow b ₂ direction to the insertion direction by the eject arm 52. Therefore, even if the user interrupts the insertion of the optical disk 2 in the middle, the optical disk 2 can be pushed back to the ejection position, and a situation where it is left at a halfway position in the housing 3 can be prevented.

When the optical disk 2 is inserted into the housing 3 to some extent, a driving mechanism 120 described later is driven, and the optical disk 2 is retracted by the loading arm 51 and an operation that receives the driving force of the driving motor 121 is performed. since the first link arm 54 is moved by the arm 58, urging force in the arrow b ₂ direction by the tension spring 56 will not act on the eject arm 52. Further, when the optical disk 2 is ejected, the first link arm 54 is guided so that the latching portion 96 and the latching portion 98 of the main chassis 6 are not separated from each other. The urging force does not act on the eject arm 52 and the optical disc 2.

  As shown in FIG. 33, the locking portion 98 of the main chassis 6 to which the tension coil spring 56 is locked between the locking portion 96 of the first link arm 54 has a plurality of locking holes 98a. Yes. The tension coil spring 56 can change the extension length when the optical disk 2 is inserted by changing the locking hole 98a, thereby making the biasing force in the ejection direction variable. In addition, a plurality of locking holes can be formed in the locking portion 96 formed in the first link arm 54. Furthermore, a plurality of locking holes can be formed in both the locking portion 96 and the locking portion 98.

  In this way, by providing a plurality of locking holes in the first link arm 54 and / or the locking portions 96, 98 of the main chassis 6, the extension length of the tension coil spring 56 can be adjusted, and a plurality of tension coil springs 56 having different strengths can be adjusted. Without preparing the above, it is possible to make a desired discharge force act by simply changing the locking position in the locking hole. The urging force of the ejecting coil 52 in the ejecting direction of the eject arm 52 by the tension coil spring 56 can be changed by preparing a plurality of tension coil springs having different strengths. However, it is necessary to prepare a plurality of types of tension coil springs, and the number of parts increases. And parts management by the service department become complicated. Therefore, by forming a plurality of locking holes in the first link arm 54 and the locking portions 96, 98 of the main chassis 6, it is possible to eliminate the burden of using such multiple types of tension coil springs.

  The second link arm 55, which is rotatably engaged with the other end 54b of the first link arm 54, is made of a long sheet metal, and is guided by a guide groove 114 of the loop cam 57 at one end 55a. 113 is provided so that the other end 55b is rotatably engaged with the other end 54b of the first link arm 54. The second link arm 55 controls the distance between the locking portion 96 of the first link arm 54 and the locking portion 98 of the main chassis 6 by the guide convex portion 113 being guided by the loop cam 57.

  Further, the second link arm 55 is formed with an engaging projection 116 that is engaged with a cam groove 108 formed in an operation arm 58 described later. The disc transport mechanism 50 can rotate the eject arm 52 in response to the movement of the slider 122 by engaging the engaging projection 116 of the second link arm 55 with the cam groove 108. 2 can be stably discharged to a predetermined discharge position.

That is, when a load is applied when the panel curtain provided in the disk insertion / removal port 19 of the front panel 18 is in sliding contact with the optical disk 2 while the optical disk 2 is being ejected, the rotation support member 71 of the eject arm 52 and the first link arm 54 is biased in the arrow _{b 1} direction. Here, if the second link arm 55 and the operation arm 58 are not engaged with each other by the engagement protrusion 116, the operation arm 58 slides in the direction of the arrow f _{2 of the} slider 122. Accordingly, the eject arm 52 can be rotated in the direction of the arrow b ₂ simply by rotating in the direction of the arrow d ₂ with the engaging hole 80 as a fulcrum with respect to the rotation support member 71 even if it is moved in the direction of the arrow d _2. become unable. Further, the second link arm 55 only rotates relative to the first link arm 54.

On the other hand, when the second link arm 55 is engaged with the operation arm 58 by the engagement protrusion 116, the engagement protrusion 116 moves to the side wall of the cam groove 108 as the operation arm 58 moves in the arrow d ₂ direction. The second link arm 55 cannot be freely rotated with respect to the first link arm 54. That is, the first link arm 54 is rotated in the arrow d ₂ direction is restricted by the engagement protrusion 116 of the second link arm 55 is brought into contact with the side wall of the cam groove 108. Therefore, during ejection of the optical disk 2, even if the eject arm 52 is urged in the arrow b ₁ direction, when the operation arm 58 is moved in the arrow d ₂ direction, the first link arm 54, the arrow b ₁ It is moved in the arrow d ₂ direction while against the urging force in the direction to rotate the eject arm 52 in the arrow b ₂ direction. This eject arm 52 by the rotation in the arrow b ₂ direction according to the slide amount of the arrow f ₂ direction of the slider 122 is realized, it is possible to reliably discharge the optical disc 2 to a predetermined discharge position.

The second link arm 55 is formed with a locking hole 115 at an end engaged with the first link arm 54, and a torsion coil spring 119 is locked. The torsion coil spring 119 has one end locked to the first link arm 54 and the other end locked to the locking hole 115 of the second link arm 55, whereby the first link arm 54 and the second link arm 54 are locked. direction that forms an angle between the link arm 55 increases, for ie rotation urging the first link arm 54 and the second link arm 55 in FIG. 33 and is it is open arrows g ₁ and an arrow g ₂ directions. As a result, the second link arm 55 can get over the protrusion 112e provided on the loop cam 57, which will be described later, by the guide projection 113, and can be guided from the retracting guide wall 112b to the discharge guide wall 112c.

  The loop cam 57 that guides the movement of the guide projection 113 of the second link arm 55 causes the eject arm 52 to generate a biasing force in the ejecting direction when the optical disc 2 is inserted. An insertion guide portion that guides the first and second link arms 54 and 55 so as not to generate an urging force in the ejection direction on the eject arm 52 when the optical disk 2 is retracted and ejected; As shown in FIG. 34, it has a discharge guide portion, and is formed in a substantially plate-like loop cam plate 111. The loop cam plate 111 is connected to the main chassis 6 as shown in FIG. Is attached to the bottom case 4 side surface of the upper surface 6a. A substantially annular cam wall 112 is erected on the loop cam plate 111 toward the bottom case 4 side. The cam wall 112 is one in which the guide convex portion 113 of the second link arm 55 makes one round in the operation of pulling in and discharging from the insertion of the optical disc 2, and the guide convex portion 113 slides when the optical disc 2 is inserted. The guide wall 112a, the retracting guide wall 112b on which the guide convex portion 113 slides when the optical disc 2 is retracted, and the discharge guide wall 112c on which the guide convex portion 113 slides when the optical disc 2 is ejected are continuously annularly formed. By surrounding these with an outer peripheral portion 112d, an annular guide groove 114 in which the guide convex portion 113 moves is formed. The loop cam 57 is formed with a protrusion 112e that prevents the guide protrusion 113 from going backward between the retracting guide wall 112b and the discharge guide wall 112c.

  As shown in FIG. 11, the insertion guide wall 112a is formed from the right guide wall 118 side to the left guide wall 117 side, while the insertion guide wall 112a is formed from the right guide wall 118 side to the left guide wall 117 side. The discharge guide wall 112c is formed from the left guide wall 117 side toward the right guide wall 118 side toward the back surface of the housing 3.

  The operation arm 58 that is connected to the first link arm 54 and the drive mechanism 120 and operates the eject arm 52 is made of a long metal plate, and one end 58a in the longitudinal direction is connected to the slider 122 of the drive mechanism 120. The third link arm 100 is rotatably engaged, and the other end 58b is rotatably engaged with the first link arm 54. Further, the operation arm 58 is formed with a cam groove 108 through which the engaging projection 116 formed on the second link arm 55 is inserted at the center in the longitudinal direction.

As described above, the cam groove 108 is engaged with the engaging protrusion 116 of the second link arm 55 to rotate the eject arm 52 in accordance with the sliding operation of the slider 122. When the two link arms 55 go around the loop cam 57, the engagement protrusion 116 is formed in a long hole shape so as to be movable. The cam groove 108 is formed over the moving direction becomes 11 in the arrow d ₁ direction and d ₂ direction in a direction substantially perpendicular to the operating arm 58. As a result, the operation arm 58 can restrict the rotation of the second link arm 55 by the engagement protrusion 116 coming into contact with the side wall of the cam groove 108, and the arrow d of the first link arm 54 can be controlled. The rotation in _two directions can be restricted.

The operation arm 58, the slider 122 by being slid and moved to the third in 11 is substantially horizontal direction through the link arm 100 arrow d ₁ direction and d ₂ direction, the first link The arm 54 and the eject arm 52 are rotated. Specifically, the operation arm 58, and moved into a third 11 in the arrow d ₁ direction by the link arm 100, the first link arm 54 is pressed in the same direction, whereby the eject arm 52 optical disc 2 in Figure 11 the insertion direction is rotated in the arrow b ₁ direction. The operation arm 58, and moved to the third in 11 by a link arm 100 arrow d ₂ direction, the first link arm 54 is moved in the same direction, thereby discharging the eject arm 52 of the optical disc 2 in Figure 11 the direction is rotated in the arrow b ₂ direction.

The third link arm 100, which is rotatably engaged with one end 58a of the operation arm 58, is made of a substantially square metal plate, and the bent portion 100a is rotatably attached to the main chassis 6. In FIG. 11, the engagement convex portion 109 formed on one end 100 b extending from the bent portion 100 a is engaged with the slider 122 while being supported rotatably in the directions of the arrows c ₁ and c ₂ . The other end 100c is rotatably engaged with the operation arm 58. Thus the third link arm 100, the slider 122 by the driving force of the driving motor 121 of the driving mechanism 120 is conveyed in Figure 11 the arrow f ₁ direction, a first guide groove formed in the slider 122 It is rotated in the guide to view 11 in the arrow c ₁ direction 125 to move the actuating arm 58 in the arrow d ₁ direction in the drawing. The third link arm 100, the slider 122 is conveyed in Figure 11 to the direction of arrow _{f 2,} it is rotated in the first guided by the guide groove 125 same in the arrow _{c 2} direction, actuating arm 58 the move in the arrow d ₂ direction in the drawing.

  The left and right guide walls 117 and 118 disposed on the left and right sides of the disc transport area guide insertion / ejection by sliding the side surface of the optical disc 2, such as a synthetic resin that is softer than the optical disc 2. Is formed by. The right guide wall 118 is disposed on the deck portion 4a, and the left guide wall 117 is disposed on the main chassis 6, all of which are fixed by screws, adhesive tape, or the like.

  The left and right guide walls 117 and 118 are provided with side walls 117a and 118a. These side walls 117a and 118a are provided at positions separated from the side surface of the optical disc 2 conveyed to the centering position by a predetermined clearance, and do not contact the side surface portion of the optical disc 2 that is rotationally driven.

Next, operations from insertion to ejection of the optical disk 2 by the disk transport mechanism 50 configured as described above will be described. The transport state of the optical disk 2 is monitored by detecting the pressed state of the first to fourth switches SW1 to SW4 mounted on the circuit board 59. As shown in FIG. 11, the first switch SW <b> 1 is disposed in the rotation region of the rotation support member 71 of the eject arm 52, and is bent on the rotation support member 71 as the eject arm 52 rotates. When pressed by the piece 81, H / L is switched. The second to fourth switches SW2~SW4, as shown in FIG. 11, are arranged on a moving area of slider 122, sequentially H by the slider 122 is slid in the arrow _{f 1} direction or the direction of arrow _{f 2} / L is switched.

  Then, the disk drive device 1 detects the transport state of the optical disk 2 by monitoring the pressed state and the time of the first to fourth switches SW1 to SW4 with a microcomputer, and detects the drive state of the optical disk 2, the drive motor 121, the spindle motor 24a, the light A displacement driving mechanism 36 for moving the pickup 25 is driven.

Before insertion of the optical disc 2, as shown in FIG. 11, the slider 122 are slid in the arrow f ₂ direction in which the disk slot 19 side, thereby the loading arm 51, the engaging projection 64 is The loading cam plate 53 is locked to a side surface facing the first guide portion 66a formed in the first cam groove 66, and the contact portion 61 is pivotally held at a position retracted from the transport area of the optical disc 2. ing. Further, the eject third link arm 100 is engaged with the slider 122 are rotated in the arrow c ₂ direction in FIG. 11, which thereby is rotated operated to the operation arm 58 and the first link arm 54 arm 52 is pivoted in 11 arrow _{b 2} direction. Further, since the slider 122 is slid in the f ₂ direction, the sub-slider 151 are slid in the arrow h ₂ direction, thereby the sub-chassis 29 constituting the base unit 22 is lowered to the bottom case 4 side The optical disk 2 is retracted from the transport area.

Then, when the optical disk 2 is inserted by the user from the disk insertion / removal port 19, the support portion 88 of the eject arm 52 is pressed against the insertion end surface of the optical disk 2, and the eject arm 52 is moved to the arrow b in FIG. It is rotated in _one direction. Eject arm 52 at this time, since the rotation support member 71 is rotated in the arrow b ₁ direction the mounting hole 71b as a fulcrum, also one end 54a first link arm 54 being engaged with the rotation support member 71 is the same Moved in the direction. On the other hand, the second link arm 55 being engaged with the first link arm 54, by the first link arm 54 is moved in the arrow b ₁ direction, it is engaged with the guide groove 114 of the loop cam 57 The guide protrusion 113 is moved toward the front side of the housing 3 along the insertion guide wall 112a. Since the insertion guide wall 112a of the loop cam 57 extends toward the front surface side of the housing 3 toward the right guide wall 118 side, the second link arm 55 is guided by the insertion guide wall 112a. the first link arm the other end 54b of the first link arms 54 which are engaged in the link arm and engaged is moved to the right guide wall 118 side, it is rotated in the arrow b ₁ direction together with the rotation support member 71 54 is moved in the opposite direction to the one end 54a.

That is, the first link arm 54 is moved in a direction in which the locking portion 96 in the vicinity of the other end 54 b with which the second link arm 55 is engaged is separated from the locking portion 98 of the main chassis 6. Thus the optical disc 2 is inserted, as the eject arm 52 is rotated in the 12 arrow b ₁ direction, the coil spring 56 tension is bridged between the first link arm 54 and the main chassis 6 is stretched The latching portion 96 of the first link arm 54 is biased so as to be attracted to the latching portion 98 of the main chassis 6. Here, since the engagement hole 80 of the rotation support member 71 is rotated to the front side of the housing 3, the first link arm 54 is energized by the tension coil spring 56, so that the housing 3 A force toward the rear side of the rotating support member 71, that is, an urging force in the direction opposite to the rotation direction of the rotation support member 71 acts. Thus, the eject arm 52 in FIG. 12 is a discharge direction of the optical disc 2 is urged in the arrow b ₂ direction.

  As a result, the optical disk 2 is inserted against the urging force acting on the eject arm 52 in the ejection direction, so that even when the insertion of the optical disk 2 is stopped halfway by the user, the optical disk 2 goes out of the housing 3. Since it is ejected, it is possible to prevent the optical disk 2 from remaining in the housing 3 in a halfway state.

When the optical disc 2 is inserted by the user while countering the urging force and the eject arm 52 is rotated to a predetermined angle, the second bent member 81 of the rotation support member 71 is disposed on the circuit board 59. 1 switch SW1 is pressed, and the drive mechanism 120 is activated. Drive mechanism 120, the slider 122 by a driving force of the driving motor 121 is slid into the 14 arrow _{f 1} direction. As a result, the loading cam plate 53 is also slid in the same direction together with the slider 122, so that the engaging convex portion 64 of the loading arm 51 comes into contact with the first guide portion 66 a of the first cam groove 66. The loading arm 51 is rotated by the engaging projection 64 is pressed in the arrow f ₁ direction by the first guide portion 66a, contact portion 61 around the insertion hole 60 in the arrow a ₁ direction in FIG. 14 Then, the optical disk 2 is pulled in.

Further, when the optical disc 2 by the loading arm 51 the slider 122 will be slid in the arrow f ₁ direction is conveyed to the centering position located on the disk mounting unit 23, as shown in FIG. 15, the engaging projection 64 is loaded The first cam groove 66 of the cam plate 53 is moved from the first guide portion 66a to the second guide portion 66b. Since the second guide portion 66b is formed parallel to the sliding direction of the slider 122, the loading arm 51 does not perform the guide operation of the engaging convex portion 64 accompanying the movement of the slider 122, and the optical disc 2 is brought to the centering position. Hold. Further, when the optical disk 2 is pulled in, it is understood that the base unit 22 is lowered to the chucking release position by detecting the pressed state of the first to fourth switches SW1 to SW4. It can be transported safely.

  The optical disc 2 is loaded on the loading arm 51, guided by the left and right guide walls 117, 118, and abutted on a deck arm 200 and a centering guide 220, which will be described later, thereby centering on the disc mounting portion 23. Is done.

Further, when the slider 122 is slid in the arrow _{f 1} direction, the third link arm 100 is rotated in the first is guided in FIG. 14 in the guide groove 125 of arrow _{c 1} direction of the slider 122, according a third the link arm 100 and the engaging operation arm 58 that is engaged is moved in the arrow d ₁ direction in the drawing. The first link arm 54 being engaged with the other end 58b of the operating arm 58 thus is pressed by the operation arm 58 is moved in the arrow d ₁ direction.

As shown in FIG. 12, when the eject arm 52 is rotated to the starting position of the drive mechanism 120, the guide convex portion 113 of the second link arm 55 is retracted from the insertion guide wall 112a of the loop cam 57 and pulled into the guide wall 112b. to become movable in the, is moved to the first link arm 54 is moved in the arrow d ₁ direction by the operation arm 58 the second link arm 55 is also the same direction. By the first link arm 54 and the second link arm 55 is moved in the arrow d ₁ direction, the first link arm 54 is engaging portion 96 formed at the other end 54b in the main chassis 6 The tension coil spring 56 contracts as it approaches the formed locking portion 98. Thus, in the pull-in operation the optical disc 2, the biasing force of the arrow b ₂ direction worked on the eject arm 52 is gradually progressively disappeared. In the disk transport mechanism 50, the eject arm 52 is rotated in the direction of the arrow b ₁ by the operation arm 58 that receives the driving force of the drive mechanism 120, so that the loading operation of the optical disk 2 by the loading arm 51 acts on the eject arm 52. This can be performed smoothly without being obstructed by the urging force in the ejection direction and without applying a load to the optical disc 2.

The guide protrusion 113, the second link arm 55 is rotationally biased in the arrow g ₂ direction by the torsion coil spring 119 is locked between the first link arm 54, pulling the guide When moved to the boundary between the wall 112b and the discharge guide wall 112c, the protrusion 112e provided at the boundary can be easily overcome, and when the optical disk 2 is discharged, it can be moved back toward the guide wall 112b. Absent.

The eject arm 52 has a first guide projection 113 of the second link arm 55 with the link arm 54 is moved in the arrow d ₁ direction by the operation arm 58 is guided by the pull guide wall 112b with the arrow d ₁ direction 12, the urging force of the tension coil spring 56 disappears, and the optical disk 2 is drawn into the back side of the housing 3 by the loading arm 51, so that the push-out arm 72 and the rotation support member 71 are in FIG. It will be rotated in the arrow b ₁ direction.

Further, when the slider 122 is slid in the arrow f ₁ direction, connecting arm 165 is engaged with the slider 122 is gradually being sub-slider 151 slides also in FIG. 15 in the arrow h ₁ direction by being rotated. Then, after the optical disk 2 is centered, the base unit 22 is raised from the chucking release position to the chucking position by the slider 122 and the sub-slider 151. As a result, the optical disc 2 transported to the centering position is sandwiched between the turntable 23a and the abutting protrusion 8 formed around the opening 7 of the top plate portion 5a. Be king.

  At this time, by detecting the pressed state of the first to fourth switches SW1 to SW4, it can be seen that the base unit 22 has been raised to the chucking position, and the optical disk 2 has been chucked to the turntable 23a. I understand that.

When the sub-slider 151 is further slid in the arrow h ₁ direction together with the slider 122 is moved in the arrow f ₁ direction, the base unit 22 is lowered from the chucking position to the recording and reproducing position. At this time, it is understood that the base unit 22 is lowered to the recording / reproducing position by detecting the pressed state of the first to fourth switches SW1 to SW4.

When the optical disc 2 is chucked on the turntable 23a, is pivoted to the third link arm 100 is further arrow c ₁ direction by the slider 122 being slid in the arrow f ₁ direction, the operation arm 58 is further arrow d ₁ Moved in the direction. As a result, the eject arm 52 is rotated in the direction of the arrow b ₁ via the first link arm 54. The contact protrusion 168 of the front end of the sub-slider 151 is abutted against the bent piece 81 of the rotation support member 71, the rotation support member 71 is rotated in the arrow b ₁ direction. Therefore, in the eject arm 52, the support portion 88 of the push arm 72 and the optical disc 2 are separated. Further, by the eject arm 52 is rotated in the arrow b ₁ direction, turning piece 82 formed in the rotation support member 71, it presses the centering guide 220 which is rotationally biased on the disk conveyance area The centering guide 220 is separated from the side surface of the optical disc 2. Further, since the slider 122 is slid in the arrow f ₁ direction, the loading arm 51, since the engaging portion 64 is moved from the second guide portion 66b of the loading cam plate 53 to the third guide part 66c , is pivoted in 16 arrow a ₂ direction, abutment 61 is spaced from the side surface of the optical disc 2. Furthermore, the deck arm 200 that has centered the optical disc 2 is separated from the side surface of the optical disc 2 by being pressed by the loading cam plate 53.

  As a result, the optical disk 2 is released from the various arms and the centering guide 220 and is rotatable, and waits for a recording or reproduction operation by the user.

Note the sub-slider 151 by being moved in the arrow h ₁ direction, as shown in FIG. 16, the arrow b ₂ direction of the distal end portion is abutted against the bent piece 81 of the rotation support member 71 rotates the support member 71 Is restricted. Thus, the rotation support member 71 can be an arrow b ₂ is rotated in the extrusion direction arm 72 and the centering guide 220 to prevent a situation in contact with the optical disk 2 in the drive rotation.

  Further, in the loading process of the optical disk 2 of the present disk drive apparatus 1, after the optical disk 2 is chucked on the turntable 23a, the spindle motor 24a is driven to rotate the optical disk 2 halfway, and the drive motor 121 is reversed. So-called double chucking is performed in which the base unit 22 is raised again to chucking. As a result, it is possible to prevent the optical disk 2 from being recorded and reproduced while being engaged with the turntable 23a halfway.

Reproducing operation is completed, the eject operation of the optical disc 2 is made by the user, first, the driving motor 121 of the driving mechanism 120 is reversed, the slider 122 is slid in the direction of arrow f ₂ in FIG. 17. Thus, the loading arm 51, by engaging protrusion 64 moves from the third guide portion 66c of the loading cam plate 53 to the second guide portion 66b, in Figure 17 is rotated in the arrow a ₁ direction, The contact portion 61 is in contact with the side surface of the optical disc 2.

The sub slider 151 is slid in the arrow h ₂ direction in the figure, after the pressure on the rotation support member 71 is released, the third link arm 100 is rotationally operated in the arrow c ₂ direction by the slider 122, the operation arm 58 is moved in the arrow _{d 2} direction. Since this first link arm 54 also the other end 54b by is moved in the arrow d ₂ direction, the eject arm 52 is rotated the support member 71 being engaged with one end 54a of the first link arm 54 by an arrow b _By rotating in _two directions, the contact portion 61 of the push-out arm 72 is brought into contact with the side surface of the optical disc 2. Here, in the eject arm 52, since the guide convex portion 113 of the second link arm 55 is moved to the discharge guide wall 112c side of the loop cam 57, the locking portion 96 of the first link arm 54 and the main chassis 6 are connected. The engaging portion 98 is rotated without being separated, and the urging force in the discharging direction by the tension coil spring 56 is not generated.

Moreover, by loading cam plate 53 is moved in the same direction the slider 122 moves to an direction of arrow f _2, the deck arm 200 which has been pressed by the loading cam plate 53 is also in contact with the side surface of the optical disc 2 The

Then, further the slider 122 is slid in the direction of arrow f _2, also by the sub-slider 151 is slid into the 17 arrow h ₂ direction to lower the base unit 22 from the recording and reproducing position to the chucking release position. As a result, the optical disk 2 is pushed up by the guide pins 180 erected from the bottom case 4, and the chucking with the turntable 23a is released. The guide pin 180 for releasing the chucking of the optical disc 2 will be described later.

  At this time, when the pressed state of the first to fourth switches SW1 to SW4 is detected, it can be seen that the base unit 22 has been lowered to the chucking release position, and the optical disk 2 can be safely ejected. I understand that.

Then, since the third link arm 100 being engaged with the slider 122 is further rotated in the arrow c ₂ direction by sliding the first guide groove 125 of the slider 122, the operation arm 58 is further arrow It is moved to the d ₂ direction. As shown in FIG. 18, when the first link arm 54 with the movement of the arrow d ₂ direction of the operation arm 58 is moved in the same direction, the eject arm 52, according to the amount of movement of the actuating arm 58 Figure 18 in is rotated in the arrow b ₂ direction, it will eject the optical disc 2.

At this time, the loading arm 51 can be rotated only in accordance with the slide of the loading cam plate 53 by engaging the engaging convex portion 64 with the first cam groove 66 of the loading cam plate 53. Rotation is restricted. The loading arm 51, by loading cam plate 53 is slid into 18 in the direction of arrow _{f 2} with the slider 122, the engaging projection 64 is guided from the second guide portion 66b to the first guide portion 66a The Although the loading arm 51 is rotated in the arrow a ₂ direction by the first guide portion 66a is restricted, along with the optical disk 2 is gradually discharged to the front side of the housing 3 by the eject arm 52, a first guide since part 66a is rotatable in the arrow a ₂ direction by going to the front side of the housing 3 in accordance with the sliding of the slider 122, it is not to interfere with the ejection of the optical disk 2 by the eject arm 52.

Further, in this manner, the loading arm 51 is restricted from rotating in the direction of the arrow a ₂ that is the ejection direction of the optical disc 2 by the contact of the engaging convex portion 64 with the first guide portion 66 a, and the slider 122. slides and since it corresponds to the rotation of the eject arm 52 is rotatable in the arrow a ₂ direction, the optical disk 2 is subjected to the bias of the ejecting direction by the deck arm 200 suddenly from the disk slot 19 Can be prevented from jumping out.

Further, the loading arm 51 is biased constantly optical disc 2 in the arrow a ₁ direction for urging the housing 3 by a leaf spring 62 which is fixed to the deck portion 4a. Thus, the loading arm 51, the engaging portion 64 is rotated to a position that contacts the first guide portion 66a, to be urged in the arrow a ₁ direction by the leaf spring 62, the optical disc 2 When the eject arm 52 and the deck arm 200 move in the ejection direction, an urging force in the insertion direction is applied to prevent the optical disk 2 from popping out. The urging force of the leaf spring 62 is a small force compared to the rotational force of the eject arm 52 in the ejection direction, and does not interfere with the ejection of the optical disk 2 by the eject arm 52, and an excessive load is applied to the optical disk 2. It does not give.

Further, by being moved in the arrow _{d 2} direction by the first link arm 54 is operated arm 58, the second link arm 55, the guide protrusion 113 is in the ejection guide wall 112c and the outer peripheral wall 112d of the loop cam 57 Slide through the enclosed area. At this time, by the rotation supporting member 71 of the eject arm 52 is rotated in the arrow b ₂ direction by the operation arm 58 via a first link arm 54, engaging the first link arm 54 is engaged hole 80 is moved toward the rear side of the housing 3 and the arrow b ₂ direction. Thus, the first link arm 54 is engaged with the engaging hole 80, and moves in the arrow d ₂ toward the rear side of the housing 3 at approximately the same position without changing the angle most. Since the locking portion 98 formed on the main chassis 6 is formed in the vicinity of the left side corner portion on the back side where the loop cam 57 is locked, the locking portion 96 of the first link arm 54 is engaged with the main chassis 6. The tension coil spring 56 is not stretched by moving while maintaining substantially the same distance from the stop 98. Thus, the eject arm 52, without being biased in the helical tension spring 56, will be rotated in the arrow b ₂ direction, which is the discharge direction by the driving force of the driving mechanism 120, by an amount corresponding to the sliding of the slider 122 Since the optical disk 2 is rotated, the optical disk 2 can be stably discharged to a predetermined discharge position without ejecting the optical disk 2 by the urging force of the tension coil spring 56.

At this time, the disk transport mechanism 50 moves the arrow relative to the eject arm 52 and the first link arm 54 by sliding the optical disk 2 on the panel curtain provided in the disk insertion / removal port 19 of the front panel 18. b When an urging force in _one direction is applied, the first link is brought into contact with the side wall in the cam groove 108 of the operation arm 58 as described above, as described above. since the rotation of the arrow d ₂ direction of the arm 54 is restricted, the with the operation arm 58 is moved in the amount corresponding to the arrow d ₂ direction according to the slide amount of the arrow f ₂ direction of the slider 122 1 The link arm 54 and the eject arm 52 are rotated. Therefore, the disc transport mechanism 50 can rotate the eject arm 52 by an amount corresponding to the sliding operation of the slider 122 against the urging force in the direction of the arrow b ₁ .

  Then, as shown in FIG. 19, when the slider 122 is moved to the initial position, the slide switch is stopped by pressing the detection switch, and in response to this, the eject arm 52 is also connected to the operation arm 58 and the first link. The optical disk 2 is rotated to the initial position by the arm 54 and stopped at the position where the central hole 2a is ejected from the disk insertion / removal port 19. At this time, when the pressed state of the first to fourth switches SW1 to SW4 is detected, it is understood that the optical disk 2 has been transported to the predetermined ejection position by the eject arm 52, and the drive of the drive motor 121 is stopped.

  Here, the pull-in timing of the optical disk 2 inserted by the user by the loading arm 51 and the discharge restriction timing of the loading arm 51 when the optical disk 2 is discharged are the position in the sliding direction of the loading cam plate 53 of the first guide portion 66a. It is determined by the length of the second guide portion 66b.

That is, the loading arm 51 as described above is regulated rotated by the engaging projection 64 is guided by the first cam groove 66 of the loading cam plate 53, the eject arm 52 arrow b ₂ direction When the ejection of the optical disc 2 is started, the engagement convex portion 64 is brought into contact with the second guide portion 66b and the first guide portion 66a, whereby the arrow a ₂ indicating the ejection direction of the optical disc 2 is reached. rotation in the direction is restricted, the amount of rotation of the arrow a ₂ direction in accordance with the amount of movement in the direction of arrow f ₂ of the first guide portion 66a has been decided. Therefore, to shorten the length of the second guide portion 66b, it is moved to the position of that amount first guide portion 66a in the sliding direction of the front side of the loading cam plate 53 (the direction of arrow f _2), correspondingly engaged The timing at which the joint convex portion 64 is regulated from the second guide portion 66b to the first guide portion 66a is advanced, and the arrow a _{2 is} relatively early with respect to the rotation of the eject arm 52 in the arrow b ₂ direction. Rotation in the direction is possible. This prevents the loading arm 51 from obstructing the ejection operation of the optical disc 2 by delaying the rotation timing of the loading arm 51 by the loading cam plate 53 with respect to the ejection operation of the optical disc 2 by the eject arm 52. it can.

On the other hand, the drawing timing of the optical disc 2 is also determined by the position of the first guide portion 66a of the loading cam plate 53 and the length of the second guide portion 66b. That is, the optical disc 2 is inserted by the user, the drive mechanism 120 is activated the slider 122 and the loading cam plate 53 is moved in the arrow f ₁ direction. Since that contacts the first guide portion 66a, the loading arm 51 is rotated in the arrow a ₁ direction, the optical disc 2 inserted by the user housing thereby engaging protrusion 64 moves in the arrow f ₁ direction It will be pulled into the back side of the body 3. Accordingly, the second guide portion 66b takes longer, by forming the position of the slide direction of the loading cam plate 53 of the first guide portion 66a in the sliding direction rear side (arrow f ₁ direction), the disc slot 19 correspondingly The insertion by the loading arm 51 can be started even when the insertion depth is shallow, that is, the user does not insert the optical disc 2 deeply.

  Therefore, in the disk transport mechanism 50, the position where the first guide portion 66a of the loading cam plate 53 is formed and the first position of the loading cam plate 53 so that the loading arm 51 can prevent the optical disk 2 from being ejected and the optical disk 2 can be pulled in early. The length of the second guide portion 66b is determined. In this disk drive device 1, as shown in FIG. 13, for example, when an optical disk having a diameter of 12 cm is used, the distance from the disk insertion / removal port 19 to the side surface on the rear side in the optical disk insertion direction is about 23 mm to 30 mm. It can be designed so that it can be pulled in by the loading arm 51. In this way, the disk drive device 1 can reduce the insertion distance by the user by setting the drawing position of the optical disk 2 away from the disk insertion / removal port 19, and pulls the optical disk 2 into the housing 3 without inserting it. Therefore, the feeling of use can be improved.

Further, the pull-in timing of the insertion direction of the loading arm 51 (arrow a ₁ direction) during retraction of the optical disc 2, the ejecting direction of the loading arm 51 at the time of ejecting operation of the optical disc 2 by the eject arm 52 (arrow a ₂ direction) The rotation timing of the slider 122 can be defined by the first cam groove 66 formed in the loading cam plate 53. The loading cam plate 53 is inserted in and removed from the slider 122 when the optical disk 2 is pulled in and out (arrow). It is operated by reciprocating driving in the directions f ₁ and f ₂ . The slider 122 is slid at the same speed by the same amount on the same route when the optical disk 2 is drawn and ejected. Thus, when retraction of the optical disc 2, and at the time of ejection, amount of rotation of the arrow a ₁ direction and a ₂ direction of the loading arm 51 relative to the slide amount of the slider 122 and the loading cam plate 53 is the same, the arrow of the loading arm 51 rotation of the pivot to the arrow a ₂ direction of the a ₁ direction uniquely determined by the sliding position of the slider 122 and the loading cam plate 53.

On the other hand, the eject arm 52 for rotating the optical disc 2 to the discharge direction (arrow b ₂ direction), the amount of rotation of the insert relative to the slide amount of the slider 122 during the insertion optical disc 2 (arrow b ₁ direction), during discharge different from the amount of rotation of the ejecting direction (arrow b ₂ direction) relative to the slide amount of the slider 122 in. During this retraction of the optical disk 2, the eject arm 52, while being rotated in the somewhat insertion direction (arrow b ₁ direction) by the user of the insertion operation before the slider 122 is driven, the optical disc 2 At the time of ejection, the optical disk 2 including the amount inserted by the user is ejected. That is, although the slide amount of the slider 122 is the same when the optical disk 2 is drawn and ejected, the rotation amount of the eject arm 52 that is rotated according to the slide of the slider 122 is different.

The difference in the rotation timing of the eject arm 52 with respect to the movement of the slider 122 when the optical disk 2 is inserted and ejected is the second link connected to the rotation support member 71 of the eject arm 52 via the first link arm 54. This is because the movement path of the arm 55 is regulated by the loop cam 57 from insertion to ejection of the optical disk 2. That is, when the optical disc 2 in a state in which the slider 122 is not driven eject arm 52 is inserted from the disk slot 19 is rotated in the arrow b ₁ direction, the second link arm 55 is guided by the insertion guide walls 112a The When the slider 122 is driven from the front surface to the back surface of the housing 3, the eject arm 52 is further rotated in the direction of arrow b ₁ , and the optical disk 2 is retracted to the disk mounting portion 23, the second link arm 55 is retracted. Guided by the guide wall 112b. When the slider 122 is driven from the back surface to the front surface of the housing 3, the eject arm is rotated in the direction of the arrow b ₂ , and the optical disk 2 is ejected from the disk mounting portion 23 to the disk insertion / removal port 19. The arm 55 is guided by the discharge guide wall 112c and moved to the insertion guide wall 112a. Thus, the second link arm 55 is guided by the loop cam 57 relative to the amount of movement of the slider 122 when the optical disk 2 is inserted and retracted, and the second link is relative to the amount of movement of the slider 122 when the optical disk 2 is ejected. The arm 55 is configured to be different from the amount of movement guided by the loop cam 57.

  As described above, the loading arm 51 and the eject arm 52 are both rotated according to the sliding operation of the slider 122, but the loading arm 51 is linearly reciprocated along with the slider 122. In contrast, the ejecting arm 52 is controlled by the second link arm 55 that takes a circular trajectory with respect to the reciprocating trajectory of the slider 122. Also in the disk transport mechanism 50, the trajectory of the guide convex portion 113 of the second link arm 55 that orbits the guide groove 114 of the loop cam 57 with respect to the reciprocating trajectory of the slider 122 can be uniquely determined. The rotation timing of the loading arm 51 and the eject arm 52 can be matched to the reciprocating drive.

  Here, with respect to the guide groove 114 of the loop cam 57 in which the guide convex portion 113 of the second link arm 55 slides, the guide convex portion that moves according to the movement of the eject arm 52 and the slider 122 from insertion to ejection of the optical disc 2. In the case of forming a narrow shape without taking a margin with respect to the trajectory of 113, the guide convex portion 113 cannot be smoothly moved due to an accuracy error, a mounting error, a secular change, etc. of the loop cam 57 and various arms. There is a possibility that 113 cannot go around the guide groove 114. Therefore, the loop cam 57 needs to have a certain width for the guide groove 114 around which the guide protrusion 113 circulates.

On the other hand, giving the width to the guide groove 114 may cause the second link arm 55 and the eject arm 52 to not follow the movement of the slider 122 with high accuracy. For example, at the time of ejection of the optical disk 2, the discharge guide wall 112c of the second link arm 55 the slider 122 is moved through the operation arm 58 and the first link arm 54 with the be moved to the direction of arrow f ₂ The slide timing of the slider 122 and the slide timing of the loading cam plate 53 accompanying the slide of the slider 122 cause a deviation, and the arrow a ₂ direction according to the rotation timing of the eject arm 52 in the direction of arrow b ₂ There may be a deviation between the rotation timing of the loading arm 51 and the rotation timing. For this reason, when the optical disk 2 is about to be ejected by the eject arm 52, the loading arm 51 is not opened, and there is a possibility that the ejection of the optical disk 2 may be hindered.

In order to absorb such a deviation between the ejection timing of the eject arm 52 and the opening timing of the loading arm 51 and to smoothly eject the optical disc 2 by the eject arm 52, a rotation support member 63 formed in the loading arm 51 is provided. The insertion hole 60 to be inserted is formed in a long hole shape. In the loading arm 51, the insertion hole 60 is formed in a long hole shape, so that the rotation fulcrum moves along the longitudinal direction of the insertion hole 60. Thus the loading arm 51, when energized in the arrow a ₂ direction by the optical disc 2 which is pressed by the eject arm 52, the rotation fulcrum is rotatable in the same direction to move. Therefore, even when the rotation timing of the eject arm 52 and the loading arm 51 due to the stroke of the slider 122 is deviated, the ejection of the optical disc 2 is not hindered.

Further, by forming the insertion hole 60 of the loading arm 51 into a long hole shape, the first guide portion 66 a of the first cam groove 66 formed in the loading cam plate 53 is provided on the back side of the housing 3. it is possible to prevent the case where hastened pull timing disc 2 is also open timing of the arrow a ₂ direction of the loading arm 51 at the time of ejection of the optical disk 2 is delayed by increasing the second guide portion 66b .

That is, the loading arm 51 is rotated in the direction of the arrow a ₁ that draws the optical disc 2 into the housing 3 when the engaging convex portion 64 is pressed by the first guide portion 66 a of the first cam groove 66. Therefore, the insertion distance of the optical disc 2 by the user's hand can be shortened by contacting the first guide portion 66a as soon as possible from the start of sliding of the slider 122. On the other hand, the loading arm 51 is moved along the first guide portion 66a after the engaging convex portion 64 is guided by the second guide portion 66b of the first cam groove 66. since the rotatable optical disc 2 out of the arrow a ₂ direction to be discharged, by the second guide portion 66b is provided long, is rotated in the arrow b ₂ direction eject arm 52 to discharge the optical disc 2 in it are state, when the engaging protrusion 64 is not moved in the first guide portion 66a side, the loading arm 51 is hindered the ejection of the optical disk 2 can not be rotated in the arrow a ₂ direction.

At this time, by forming a through hole 60 in the long hole shape, since the shift is the pivot point, the loading arm 51, arrows a ₂ can be rotated in a direction, the loading arm 51 at the time of ejection of the optical disc 2 it is possible to prevent the opening timing of the arrow a ₂ direction is delayed.

  In addition, the loading arm 51 is provided with a long hole-like insertion hole 60, the rotation support member 63 is provided on the deck portion 4a, and the cylindrical rotation support member 63 is provided on the loading arm 51 so as to protrude from the deck portion 4a. A long hole-shaped insertion hole 60 may be formed in the upper and lower portions, and the loading arm 51 may be rotatably supported.

  Here, the disc transport mechanism 50 grips the optical disc 2 by recognizing that the user has made a mistake in the optical disc 2 to be inserted in a state where the predetermined amount of the optical disc 2 is inserted and the drive of the drive motor 121 is started. In this case, after the drive motor 121 is stopped, the optical disk 2 is ejected by being driven reversely.

Specifically, when a predetermined amount of the optical disk 2 is inserted from the disk insertion / removal port 19 and the drive motor 121 is driven, the loading arm 51 is moved in the direction of the arrow f ₁ along with the movement of the slider 122 and the loading cam plate 53 in the direction of arrow f _1. a Turned in _one direction. Here, when the optical disk 2 is gripped by the user, the rotation of the loading arm 51 is restricted, while the loading cam plate 53 is slid in the direction of the arrow f ₁ together with the slider 122. The mating convex portion 64 is locked to the first guide portion 66 a of the loading cam plate 53. Thereby the slide in the arrow f ₁ direction of the slider 122 and the loading cam plate 53 is restricted. In this state, when a predetermined time elapses, the drive motor 121 is driven in the reverse direction, and the optical disk 2 is ejected in a process reverse to the process of inserting the optical disk 2 described above.

At this time, since the optical disc 2 is inserted by a predetermined amount, the guide projection 113 of the second link arm 55 is also slid on the insertion guide wall 112a of the loop cam 57, so that the first link arm 54 is locked. The portion 96 and the locking portion 98 of the main chassis 6 are moved away from each other, and the tension coil spring 56 spanned between them is extended. Therefore, the driving motor 121 is driven in the reverse direction, the slider 122 has finished is slid in the arrow f ₂ direction, the eject arm 52, the first link arm 54 that receives the urging force of the tension coil spring 56 is rotated, arrow b ₂ It is rotated in the direction. Therefore, in the disk drive device 1, the eject arm 52 is urged to rotate in the direction of arrow b ₂ that ejects the optical disk 2 out of the disk insertion / removal port 19 by the tension coil spring 56, and the optical disk 2 is ejected by the urging force of the tension coil spring 56. To do.

Therefore, by the guide protrusion 113 of the second link arm 55 to reverse the insertion guide wall 112a without passing through the discharge guide wall 112c side, the eject arm 52 by sliding in the direction of arrow f ₂ of the slider 122 Although it cannot be rotated to the discharge position, the eject arm 52 can be rotated to the discharge position by the urging force of the tension coil spring 56 stored when the optical disk 2 is inserted. Therefore, when the optical disk 2 is loaded, the drive of the drive motor 121 is stopped when the optical disk 2 is grabbed, and the optical disk 2 can be prevented from being left in a state of being halfway through the disk insertion / removal port 19. .

  The abnormal conveyance of the optical disc 2 can be detected by the microcomputer monitoring the pressed state of the first to fourth switches SW1 to SW4 mounted on the circuit board 59. That is, the time for which the slider 122 moves from the state in which the first switch SW1 is pressed by the eject arm 52 until it is detected that the base unit 22 is lowered to the chucking release position is a predetermined time, for example, 3 seconds or more. If it takes, or if it takes a predetermined time or more until the base unit 22 moves from the chucking release position through the chucking position to the recording / reproducing position, it is detected that the conveyance is abnormal, and the drive motor 121 is detected. The optical disc 2 is ejected by stopping and reversing.

  Further, when an obstacle such as a book is placed in front of the disk insertion / removal port 19 when the optical disk 2 is ejected, the optical disk 2 cannot contact and eject the obstacle, and the drive motor of the drive mechanism 120 An excessive load is applied to 121. Further, when the optical disk 2 is sandwiched between the eject arm 52 that is rotated by the driving force of the drive motor 121 and the obstacle, an excessive load is applied to the optical disk 2.

Here, the disk drive device 1, as shown in FIG. 23, the arrow b ₁ direction around the opening 77 and the engaging portion 85 by the rotation support member 71 and the push-out arm 72 and the caulking shaft 89 of the eject arm 52 And b ₂ is rotatably engaged and is urged by a coil spring 73 with a predetermined force in the direction of arrow b ₂ . Therefore, when the optical disk 2 is ejected, an obstacle that prevents the optical disk 2 from being ejected is placed, and a force in the direction opposite to the ejection direction (arrow b ₂ direction) of the optical disk 2 is applied to the eject arm 52. by extrusion arm 72 which receives the force is rotated in the arrow b ₁ direction, it is possible to prevent a situation in which it takes an excessive load to the driving motor 121 and the optical disc 2.

The disc drive apparatus 1, the push-out arm 72 of the eject arm 52 stops driving of the driving motor 121 to be rotated in the arrow b ₁ direction. If a predetermined time elapses while an obstacle is placed in front of the disk insertion / removal port 19 and the ejection of the optical disk 2 is obstructed, the optical disk 2 is again drawn into the disk mounting portion 23 side. That is, when the optical disk 2 is ejected to the outside from the disk insertion / removal port 19 and one side surface of the optical disk 2 comes into contact with an obstacle and the ejection of the optical disk 2 is stopped for a predetermined time, the drive motor 121 It is rotated in reverse. Accordingly, the first and second link arms 54 and 55 and the operation arm 58 described above are moved in the reverse direction to perform the loading operation of the optical disc 2. Also in this case, since the guide convex portion 113 of the second link arm 55 moves backward along the discharge guide wall 112c, the first link arm 54 and the locking portion 98 of the main chassis 6 are separated from each other. Therefore, the tension coil spring 56 is not expanded, and the urging force in the ejection direction does not act on the eject arm 52.

  As a result, the disk drive device 1 can prevent the optical disk 2 from being left in a state of being sandwiched between the eject arm 52 that is rotated in the ejection direction and the obstacle, and the drive motor 121 and the optical disk. 2 can be prevented from being overloaded.

  The abnormal conveyance of the optical disc 2 can be detected by the microcomputer monitoring the pressed state of the first to fourth switches SW1 to SW4 mounted on the circuit board 59. That is, it takes a predetermined time, for example, 3 seconds or longer, until the drive motor 121 is reversed and the base unit 22 moves down from the recording / reproducing position to the chucking release position through the chucking position. When the slider 122 moves for a predetermined time or more from when the base unit 22 is lowered to the chucking release position until all the first to fourth switches SW1 to SW4 are not pressed, abnormal transport is performed. When it is detected, the drive motor 121 is stopped, and the optical disk 2 is loaded by rotating it forward.

  The loop cam 57 has a large movable region 114a of the guide convex portion 113 in each extending direction of the insertion guide wall 112a and the retracting guide wall 112b of the guide groove 114. When the optical disk 2 is inserted to the deepest part of the housing 3 in a state where the power of the disk drive device 1 is not turned on, the movable region 114a collides with the guide convex part 113 and the outer peripheral part 112d of the loop cam 57 to convey the disk. The mechanism 50 is prevented from being damaged, and the maximum movable range of the guide convex portion 113 accompanying the insertion of the optical disc 2 is secured.

That is, as shown in FIG. 35, in the state with the power supply of the disk drive apparatus 1, the optical disc 2 is inserted, the drive motor 121 is driven, the slide and the operating arm 58 in the arrow f ₁ direction of the slider 122 the guide protrusion 113 moves the pull guide wall 112b to the discharge guide wall 112c side in accordance with the movement of the arrow _{d 1} direction. However, in the state where the power of the disk drive device 1 is not turned on, the drive motor 121 is not driven even when the optical disk 2 is inserted to the back of the housing 3, so that the guide convex portion 113 includes the operation arm 58 and the second link arm. 55 is not moved toward the discharge guide wall 112c. Thus the guide protrusion 113 of the second link arm 55, when the user presses the optical disc 2 further into from the original retracted starting position, the eject arm 52 arrow b ₁ guide by being further rotated in the groove 114 This causes an excessive load on the loop cam 57, the first and second link arms 54 and 55, or the eject arm 52.

  Therefore, the loop cam 57 ensures the maximum movable range of the guide convex portion 113 as the movable region 114a when the optical disc 2 is inserted to the deepest portion of the housing 3 in a state where the power is not turned on. As a result, the disk drive device 1 allows the user to pull the optical disk 2 by the loading arm 51 even when the optical disk 2 is inserted to the deepest part of the housing 3 in a state where the power is not turned on or when the power is turned on. Even when it is pushed to the deepest part of the housing 3 without waiting, the disc transport mechanism 50 can be prevented from being damaged due to the collision between the guide projection 113 and the loop cam 57.

  As described above, according to the disc transport mechanism 50 of the disc drive apparatus 1 to which the present invention is applied, when the optical disc 2 is inserted into the predetermined position by the user when the optical disc 2 is inserted, the insertion guide wall of the loop cam 57 is inserted. The guide projection 113 of the second link arm 55 is slid on 112a to guide the first link arm 54 and the locking portion 98 of the main chassis 6 in a direction away from each other. Since the urging force in the discharge direction by the tension coil spring 56 that is stretched can be applied to the eject arm 52, the optical disk 2 is inserted into the housing 3 halfway when the user stops inserting the optical disk 2. It is possible to prevent a situation where the device is left in a state where it is left.

  When the optical disk is retracted, the guide projection 113 is slid on the retracting guide wall 112 b of the loop cam 57 to bring the first link arm 54 and the locking portion 98 close to each other and the operation arm 58 further ejects the arm 52. Is turned in the retracting direction to eliminate the urging force applied to the ejecting arm 52 in the ejecting direction by the tension coil spring 56, and according to the operation of the slider 122 and the operating arm 58 receiving the driving force of the driving mechanism 120. The eject arm 52 can be rotated.

  When the optical disk 2 is ejected, the guide projection 113 is slid on the ejection guide wall 112c of the loop cam 57, so that the first link arm 54 and the engaging portion 98 are not separated from each other, and the slider 122 and the operation arm 58 are not separated. The eject arm 52 can be rotated in the discharge direction by an amount corresponding to the operation.

  Therefore, the disk transport mechanism 50 stably discharges the optical disk 2 to a predetermined stop position where the central hole 2a of the optical disk 2 is discharged out of the housing 3 by the driving force of the driving mechanism 120 without depending on the elastic force. Can do.

  Further, the disc transport mechanism 50 does not employ a mechanism for rotating the eject arm 52 by the biasing force of the tension coil spring 56 when the optical disc 2 is ejected. There is also no contact sound generated in the Therefore, the disk drive device 1 can improve the feeling of use without noise when the optical disk 2 is ejected.

  Next, a description will be given of the deck arm 200 that prevents the small-diameter optical disk 101 from being erroneously inserted and centers the large-diameter optical disk 2. The deck arm 200 is prepared for a situation in which a user accidentally inserts an optical disk 101 having a small diameter (for example, 8 cm in diameter) because the disk drive device 1 is formed exclusively for the optical disk 2 having a large diameter (for example, 12 cm in diameter). It is provided.

That is, when the small-diameter disk 101 is brought into contact with the push-out arm 72 of the eject arm 52, as shown in FIG. 36, it engages with the tension coil spring 56 or the push-out arm 72 locked to the first link arm 54. It is pushed back into the disk slot 19 outside by the urging force of the arrow b ₂ direction by the in which the coil spring 73, also does not rotate the eject arm 52 to a position where the drive mechanism 120 is driven. On the other hand, when the small-diameter disk 101 is inserted in a biased manner toward the loading arm 51, the small-diameter disk 101 is inserted into the housing 3 without being brought into contact with the push-out arm 72 of the eject arm 52, and from the rotation region of the eject arm 52. There is a risk that it will remain at a position that is out of place.

  Therefore, even when the deck arm 200 is provided on the deck portion 4a opposite to the eject arm 52 and the small-diameter disk 101 is biased and inserted toward the loading arm 51, the small-diameter disk is inserted to the back of the housing 3. It was decided to prevent.

  As shown in FIG. 11, the deck arm 200 is rotatably provided on the back side of the housing 3 on the deck portion 4a of the bottom case 4, and in a state of waiting for the optical disc 2 to be inserted. When the small-diameter disk 101 is inserted into the disk insertion / removal port 19 side, it can be discharged out of the disk insertion / removal opening 19 by this urging force. Specifically, as shown in FIG. 37, the deck arm 200 is supported by the deck portion 4a so as to be rotatable, so that the arm member 201 is brought into contact with the optical disc 2 and the small-diameter disc 101, and is coaxial with the arm member 201. A pressing plate 202 that is supported and presses the arm member 201, and a coil spring 203 that urges the arm member 201 to rotate, and the arm member 201 and the pressing plate 202 are rotatably attached to the deck portion 4 a by a caulking shaft 204. It is attached.

  The arm member 201 includes a substantially rectangular plate-like rotation plate 201a, and an arm portion 201b that is erected from one side edge in the longitudinal direction of the rotation plate 201a and extends in the longitudinal direction. An abutting member 205 that abuts against the optical disc 2 or the small-diameter disc 101 is provided at the tip of 201b. The rotation plate 201a is provided with a rotation support portion supported by the deck portion 4a at one end in the longitudinal direction, and a guide piece 206 for guiding the rotation of the pressing plate 202 at the other end side. Further, the arm portion 201b is formed with a slit 207 that is engaged with one end 203a of the coil spring 203 at an end portion on the side of the rotation support portion in the longitudinal direction.

The pressing plate 202 supported coaxially with the arm member 201 is for reliably separating the arm member 201 from the outer periphery of the disk when the optical disk 2 is mounted on the turntable 23a. A main surface portion 202a disposed on the plate 201a and a pressing arm 202b that rises from one side edge of the main surface portion 202a on the arm portion 201b side and presses the arm portion 201b. The main surface portion 202a is formed in a substantially rectangular shape, provided with a rotation support portion supported by the deck portion 4a together with the arm member 201 at one end in the longitudinal direction, and formed at the rotation plate 201a of the arm member 201 at the other end side. A guide projection 208 guided by the guide piece 206 is projected. The pressing plate 202 is prevented from being lifted from the rotating plate 201a by the guide convex portion 208 being guided by the guide piece 206. The pressing plate 202, the side edge portions of the side edges provided with pressing arm 202b opposite the contact piece 209 abuts against the distal end of the loading cam plate 53 is slid in the arrow f ₁ direction formed Has been. Deck arm 200 is rotated in the arrow i ₁ direction by the abutment piece 209 is pressed against the loading cam plate 53, the contact member 205 provided on the distal end of the arm 201b from the outer peripheral surface of the optical disc 2 Spaced apart.

The pressing arm 202 b erected from the main surface portion 202 a extends toward the arm member 201, and the tip is in contact with the arm portion 201 b of the arm member 201. Such pressing arm 202b is to the main surface 202a of the pressing plate 202 presses when it is pressed against the loading cam plate 53 and an arm portion 201b in the arrow _{i 1} direction.

The arm member 201 and the pressing plate 202 are rotatably supported by a caulking shaft 204 on the deck portion 4a, and a coil spring 203 is wound around the caulking shaft 204, and the coil spring 203 always causes the optical disc 2 to be ejected. It is rotationally biased to the arrow i ₂ direction. The coil spring 203 has one end 203 a locked to the slit 207 of the arm portion 201 b and the other end 203 b locked to a regulation arm 212 that regulates the urging force of the coil spring 203.

When the deck arm 200 is rotated in the direction of the arrow i ₁ on the back side of the housing 3, the restriction arm 212 moves the other end 203 _b of the coil spring 203 to bias the force in the direction of the arrow i ₂ . This is to prevent the increase in the number. The restriction arm 212 is provided on the side of the arm body 213 that is rotatably mounted on the deck portion 4a and the one end 213a side of the arm body 213, and the other end 203b of the coil spring 203 is locked. And a rotation guide provided on the other end 213b side of the arm body 213 and engaged with a fourth guide portion 66d of a first cam groove 66 formed in the loading cam plate 53. Part 215.

  The arm main body 213 is formed in an elongated shape, and an insertion piece 216 through which a rotation support pin 217 that rotatably locks the arm main body 213 to the deck portion 4a is provided in the middle of the longitudinal direction. Yes. The insertion piece 216 has an insertion hole 216a through which the rotation support pin 217 is inserted. The arm main body 213 is locked to the deck portion 4a so as to be rotatable about the insertion piece 216 by inserting the rotation support pin 217 through the insertion piece 216. Further, the rotation support pin 217 is protruded from the deck portion 4a through the insertion hole 216a, so that the rotation support pin 217 is inserted into the third cam groove 69 formed in the loading cam plate 53 in parallel with the sliding direction. The slide of the cam plate 53 is guided.

The spring locking portion 214 formed at one end 213 a of the arm body 213 is locked at the other end 203 b of the coil spring 203. As a result, the coil spring 203 holds the arm member 201 whose one end 203a is engaged with the slit 207 of the arm portion 201b and the regulating arm 212 at a predetermined interval. The winding coil spring 203, since the optical disc 2 is the arm member 201 is rotated in the arrow i ₁ direction by being inserted, the rotation of the restriction arm 212 is restricted, that is inserted into the caulking shaft 204 The one end 203a locked to the slit 207 of the arm portion 201b is moved in a direction away from the other end 203b with the portion 203c as the center. As a result, the one end 203a of the coil spring 203 is urged toward the other end 203b, so that the arm portion 201b of the arm member 201 that has received this urging force also moves to the casing 3 as the optical disc 2 is inserted into the casing 3. It will be biased in an arrow i ₂ direction of a front side. Accordingly, a biasing force in the ejecting direction is applied to the deck arm 200 that receives the biasing force of the coil spring 203, so that the small-diameter disk 101 erroneously inserted can be ejected from the inside of the housing 3.

The rotation guide portion 215 provided at the other end 203b of the arm main body 213 is inserted into the fourth guide portion 66d of the loading cam plate 53 as shown in FIG. by rotating the regulating arm 212 in response to the slide in _one direction and the f ₂ direction, and controls the biasing force of the coil spring 203. That is, as shown in FIGS. 13, 14, and 15, when the optical disk 2 is inserted and the loading cam plate 53 is slid together with the slider 122 in the direction of the arrow f ₁ , of the arm body 213 by being guided by the guide portion 66d is rotated an insertion piece 216 as a fulcrum, rotating in the arrow j ₁ direction spring locking portion 214 to follow the deck arm 200 to rotate in the arrow i ₁ direction Moved. When the spring locking portion 214 follows the deck arm 200, the coil spring 203 does not separate the one end 203 a locked to the arm portion 201 b and the other end 203 b locked to the spring locking portion 214. Therefore, urging force due to the rotation of the arrow i ₁ direction of the deck arm 200 is not increased. Therefore, when the control arm 212 follows as the deck arm 200 rotates, the urging force of the coil spring 203 that urges the arm member 201 in the ejecting direction can be maintained at a constant level. The pull-in operation of the optical disc 2 is not significantly hindered.

The rotation guide section 215, the loading cam plate 53 is slid in the direction of arrow f _2, as shown in FIG. 18, is rotated by being guided by the fourth guide portion 66d, the spring locking portion 214 is rotated in the arrow _{j 2} direction. In this case the deck arm 200 also, since the one end 203a by the biasing force of the coil spring 203 is biased in a direction toward the other end 203b, the arm member 201 is rotated in the arrow _{i 2} direction. The optical disk 2 is ejected, the rotation in the arrow j ₂ direction of the spring locking portion 214 is stopped, the deck arm 200 is also rotated to the initial position to wait for the insertion of the optical disc 2.

  The abutting member 205 provided at the tip of the arm portion 201b is made of a softer resin than the optical disc 2, and the central portion that abuts the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal port 19 is curved inward. And the flange part expanded in diameter is formed in the lower end part, and it is formed so that the movement of the height direction of the optical disk 2 can be controlled.

Next, the operations of the deck arm 200 and the regulation arm 212 as described above in the process of inserting, retracting, and ejecting the optical disk 2 will be described. As shown in FIG. 11, in a state where the optical disk 2 is waiting to be inserted, the regulating arm 212 is spring-engaged by the rotation guide portion 215 being guided by the fourth guide portion 66 d of the loading cam plate 53. part 214 is rotated in the arrow _{j 2} direction. The deck arm 200 by spring locking portion 214 is rotated in the arrow _{j 2} direction, the arm member 201 is urged to one end 203a of the coil spring 203 is rotated in the arrow _{i 2} direction. At this time, the deck arm 200 is restricted from rotating in the direction of the arrow i ₂ by the tip of the guide piece 206 coming into contact with the tip of the loading cam plate 53.

In the state where the optical disk 2 is waiting to be inserted, the eject arm 52 and the deck arm 200 are in contact with the small-diameter disk 101 in which at least one of the pushing arm 72 and the contact member 205 is inserted from the disk insertion / removal port 19. It is possible. As shown in FIG. 38, when the small-diameter disk 101 is biased toward the deck portion 4a and the small-diameter disk 101 is inserted into the housing 3, the deck arm 200 is pressed against the small-diameter disk 101 by the contact member 205. arm 201b is rotated in the arrow _{i 1} direction. Accordingly, since one end 203a of the coil spring 203 is engaged with the arm portion 201b is separated from the other end 203b that is engaged with the spring locking portion 214, the arrow _{i 2} direction to the deck arm 200 is discharge direction A biasing force of the coil spring 203 is generated. Since the drive mechanism 120 is not driven even when the small-diameter disk 101 is completely inserted from the disk insertion / removal port 19, it is discharged out of the housing 3 by the deck arm 200. Thus, even when the small-diameter disk 101 is mistakenly inserted, the small-diameter disk 101 can be reliably discharged without remaining in the housing 3.

When the optical disk 2 having a large diameter is inserted, the deck arm 200 is pressed on the optical disc 2 arm member 201 is rotated in the arrow i ₁ direction. As shown in FIG. 12, in the insertion process of the optical disc 2, the drive mechanism 120 is not driven and the slider 122 and the loading cam plate 53 are not slid, so the spring locking portion 214 of the restriction arm 212 is not rotated. Therefore, when the arm member 201 is rotated in the arrow _{i 1} direction, the coil spring 203 is spaced apart from the one end 203a that is engaged with the arm member 201, and the other end 203b that is engaged with the spring locking portion 214 to continue to impart a biasing force of the arrow i ₂ direction to the deck arm 200.

Turning to the pull step the optical disc 2, the loading cam plate 53 with the slide in the arrow f ₁ direction of the slider 122 is slid in the same direction. The loading cam plate 53 is slid, 13, 14 and, as shown in FIG. 15, the deck arm 200 is further rotated in the arrow i ₁ direction by pulling of the optical disc 2 by the loading arm 51, the first fourth restriction arm 212 is guided by the guide portion 66d is rotated an insertion piece 216 to pivot spring locking portion 214 is rotated in the arrow j ₁ the direction of the cam groove 66, following the deck arm 200 Go. Therefore, the coil spring 203 attached to the deck arm 200 does not separate the one end 203a locked to the arm member 201 and the other end 203b locked to the spring locking portion 214. The urging force acting on the deck arm 200 does not increase. Thus the urging force of the arrow i ₂ direction of the deck arm 200 by the coil spring 203 is increased as draw the optical disc 2 can be prevented from being inhibited pull-in operation by the loading arm 51. Note also in the process pull the optical disc 2, since the deck arm 200 has worked urging force in the arrow i ₂ direction by the coil spring 203, the contact member 205, the outer peripheral portion of the optical disc 2 at a predetermined force in the same direction Energized.

When the optical disk 2 is almost drawn onto the disk mounting portion 23, the deck arm 200 has the contact piece 209 of the pressing plate 202 abutted against the tip of the loading cam plate 53 as shown in FIG. It is rotated in _one direction. When the pressing plate 202 is pressed against the loading cam plate 53, the pressing arm 202b which extends from the main surface portion 202a urges the arm portion 201b of the arm member 201 in the arrow _{i 1} direction. As a result, the deck arm 200 can reliably separate the contact member 205 attached to the arm portion 201b from the outer peripheral surface of the optical disc 2 attached to the turntable 23a.

In the discharging process of the optical disc 2, the loading cam plate 53 is moved in the direction of arrow f ₂ by the slider 122. When the loading cam plate 53 is slid, the loading arm 51 is rotated in the direction of the arrow a ₂ on the front side of the housing 3, and the eject arm 52 is rotated in the direction of the arrow b _2, whereby the optical disc 2 is It will be discharged. As shown in FIG. 18, when the loading cam plate 53 is slid, the restricting arm 212 is rotated with the insertion piece 216 as a fulcrum by the rotation guide portion 215 being guided by the fourth guide portion 66d, and the spring engagement. stop portion 214 is gradually being rotated in the arrow _{j 2} direction. Since with the spring locking portion 214 and the other end 203b of the coil spring 203 is rotated in the arrow _{j 2} direction by this urging force of the arm member 201 is a coil spring 203 which is locked to one end 203a and the end 203a of the coil spring 203 Is rotated in the same direction. In the deck arm 200, since the coil spring 203 is rotated according to the rotation of the regulating arm 212, the urging force of the coil spring 203 is not increased, and the optical disk 2 is not ejected by the urging force of the coil spring 203.

  When the sliding of the loading cam plate 53 is stopped, the rotation of the restriction arm 212 is also stopped, so that the rotation of the deck arm 200 by the urging force of the coil spring 203 is also stopped, and the initial position for waiting for the insertion of the optical disc 2 Return to.

When the contact member 205 contacts the outer peripheral portion of the optical disc 2 and the deck arm 200 is rotated to the rear side of the housing 3 and the optical disc 2 is pulled almost to the vicinity of the disc mounting portion 23, the arrow i _The optical disk 2 is urged in _two directions with a constant force. At this time, a centering guide 220 that is locked to the main chassis 6 is provided in the biasing direction of the contact member 205, and the loading arm 51 that pulls the optical disc 2 into the housing 3, the deck arm 200, and the centering guide 220. The optical disk 2 is centered directly above the turntable 23a of the disk mounting portion 23.

  In this way, the deck arm 200 is supported on the deck portion 4a so as to be pivotable to a position on the back side of the housing 3 relative to the disc mounting portion 23, thereby preventing erroneous insertion of the small-diameter disc 101 and the optical disc 2. Both functions of the centering guide can be achieved. Further, since the area on the back side of the housing 3 of the deck portion 4a is secured as an empty space even when the optical disk 2 is mounted on the disk mounting portion 23, the deck arm 200 has a pivot point in this area. As a result, the space in the narrowed casing 3 can be used effectively, and the casing 3 is not increased in size.

  Next, a centering guide 220 for centering the optical disc 2 together with the deck arm 200 will be described. As shown in FIG. 3, the centering guide 220 projects from the centering guide opening 6h of the main chassis 6 toward the upper surface 6a and supports the side surface of the optical disc 2 to guide the centering. 40, a guide plate 222 provided with a guide piece 221 for supporting the side surface of the optical disc 2 and a rotating plate 223 for rotating the guide plate 222 are provided. The guide plate 222 and the rotating plate 223 Are attached to the upper surface 6a of the main chassis 6 so as to be rotatable from the rear surface side.

  The guide plate 222 is made of a resin molded product, and a guide piece 221 that guides the outer peripheral surface of the optical disc 2 from one end of the main surface portion 222a is provided upright. In addition, an insertion hole 224 that is continuous with an opening 229 formed in the rotating plate 223 and into which a caulking pin is inserted is formed in the main surface portion 222a. The main surface portion 222a is formed with a locking hole 225 in which a locking portion 225a that is locked to a locking piece 228 standing on the rotating plate 223 is formed. Further, the main surface portion 222a is provided with a projecting projection 226 inserted into the connection hole 230 of the rotating plate 223 on the rear surface and side surface. The guide plate 222 can be rotated integrally with the rotating plate 223 by engaging the engaging portion 225 a with the engaging piece 228 and inserting the connecting convex portion 226 into the connecting hole 230.

  The guide piece 221 is erected from the main surface of the guide plate 222 and is in contact with the side edge of the centering guide opening 6h. The guide piece 221 protrudes from the main chassis 6 to the outer periphery of the optical disc 2. And a guide portion 221b for guiding the centering by abutting. In the guide piece 221, the guide plate 222 and the rotating plate 223 are rotated and biased toward the outer peripheral side of the optical disc 2 drawn into the housing 3, so that the abutting wall 221a becomes the centering guide opening. The guide portion 221b is positioned by contacting the side edge of 6h, and the outer peripheral surface of the optical disc 2 is supported by the guide portion 221b.

  The rotating plate 223 is made of a sheet metal member. The main surface portion 223a has a support wall 227 for supporting the guide piece 221 standing on the guide plate 222, and a locking piece 228 inserted through the locking hole 225. An opening 229 that is coaxially continuous with the insertion hole 224 and a connection hole 230 that is inserted into the connection protrusion 226 are formed.

  The support wall 227 is formed with a connection hole 230 into which a connection convex portion 226 projecting laterally from the contact wall 221a of the guide piece 221 is inserted. The support wall 227 supports the abutting wall 221 a and urges the guide piece 221 toward the outer peripheral surface of the optical disc 2 by the rotation plate 223 being rotated and biased by a tension coil spring 234 described later. The locking piece 228 is erected from the main surface portion 223 a of the rotating plate 223 and is bent to the locking portion 225 a of the locking hole 225 of the guide plate 222 by being bent in a substantially orthogonal direction. Thus, the locking piece 228 urges the guide plate 222 together with the support wall 227 toward the outer peripheral surface side of the optical disc 2.

The opening 229 is continuous with the insertion hole 224 of the guide plate 222, and a caulking pin (not shown) is inserted therethrough. Thus centering guide 220 is rotatably supported on the upper surface 6a of the main chassis 6, the guide piece 221 in FIG. 40 in the arrow k ₁ direction and the guide piece 221 which rotates on the outer circumferential surface of the optical disc 2 is the optical disc 2 the arrow k ₂ direction away from the outer peripheral surface is rotatable.

The rotating plate 223 has a cam shaft 233 that is rotated by a rotating piece 82 formed on the rotation support member 71 of the eject arm 52 on the main surface portion 223a. The cam shaft 233 is formed by attaching a caulking pin to the main surface portion 223 a of the rotating plate 223. The centering guide 220 is rotated in the direction of arrow b ₁ where the eject arm 52 pulls the optical disk 2, so that the rotation piece 82 of the rotation support member 71 comes into contact with and presses the cam shaft 233, thereby inserting the insertion hole 224. And the guide piece 221 is rotated in the direction of the arrow k ₂ away from the outer peripheral surface of the optical disc 2 with a caulking pin inserted through the opening 229 as a fulcrum.

  Further, the rotating plate 223 has an engagement piece 231 that is engaged with the rotation support member 71 of the eject arm 52 on the main surface portion 223a. As shown in FIG. 40, the engagement piece 231 is formed at a position higher than the main surface portion 223a by being bent upward from the main surface portion 223a and then bent to the rotation support member 71 side. It extends on the member 71. Thereby, the rotation plate 223 is engaged with the main surface of the rotation support member 71, and the cam shaft 233 and the rotation piece 82 can be brought into contact with each other.

Further, the rotation plate 223 has a main surface portion 223 a engaged with a centering guide 220 and a tension coil spring 234 that is urged to rotate in the direction of arrow k ₁ where the guide piece 221 contacts the outer peripheral surface of the optical disc 2. One end of the tension coil spring 234 is locked to the rotating plate 223 and the other end is locked to the main chassis 6, so that the guide piece 221 of the centering guide 220 is always urged to rotate in the direction of the arrow k _1. Yes. The guide piece 221 by being rotationally biased in the arrow k ₁ direction, positioning of the abutment wall 221a is pressed against the side edges of the centering guide opening 6h provided in the main chassis 6 guide portion 221b Is planned. The centering guide 220 is positioned by the contact wall 221a being urged to the centering guide opening 6h by the urging force of the tension coil spring 234, whereby the guide 221b is separated from the outer peripheral surface of the optical disc _2. It can prevent swinging in the direction.

Next, the centering process of the optical disc 2 using the centering guide 220 will be described. As described above, in the process of inserting and retracting the optical disk 2, the tension coil spring 234 until the camshaft 233 of the rotation plate 223 is pressed by the rotation piece 82 formed on the rotation support member 71 of the eject arm 52. the guide piece 221 by the biasing force of the rotationally biased in the arrow k ₁ direction is a peripheral surface direction of the optical disc 2, and is capable of guiding the outer peripheral surface of the optical disc 2 by the guide portion 221b.

Further, the engaging convex portion 64 is guided by the first cam groove 66 of the loading cam plate 53, so that the loading arm 51 pulls the optical disk 2 into the centering position where the center hole 2a is located immediately above the turntable 23a. Specifically the loading arm 51 is conveyed engaging portion 64 to the first is rotated in the arrow a ₁ direction to draw the optical disc 2 by being guided by the guide portion 66a substantially centered position of the first cam groove 66 To do. The loading arm 51, the engaging projection 64 is rotated in the arrow a ₁ direction and a ₂ direction is restricted by being guided by the second guide portion 66b.

Is transported further to the optical disc 2 is approximately centered position, it is rotated in the arrow i ₁ direction by the deck arm 200 is also pressed against the outer circumferential surface of the optical disc 2. At this time, the deck arm 200 applies a biasing force in the direction of arrow i ₂ to the arm member 201 by the coil spring 203. This urging force acts on the optical disk 2 from the contact member 205 attached to the arm member 201 in the direction of the turntable 23a. Further, as described above, the urging force is maintained at a constant amount without increasing due to the movement of the spring locking portion 214 accompanying the rotation of the restricting arm 212.

  That is, in the disk drive device 1, when the optical disk 2 is drawn into the housing 3 as shown in FIG. 15, the swinging of the loading arm 51 and the centering guide 220 is restricted, and a constant urging force is applied by the deck arm 200. It acts on the optical disc 2. In the disk drive device 1, the abutting portion 61 of the loading arm 51, the guide piece 221 of the centering guide 220, and the abutting member 205 of the deck arm 200 are centered on the disc mounting portion 23 around the turntable 23 a. The outer peripheral surface of the optical disk 2 is supported at three points. Of the three points, the optical disc 2 is supported in a rigid state in which swinging is restricted at two points of the contact part 61 and the guide piece 221, and the remaining one point is directed toward the turntable 23 a by the contact member 205. Energizing power is given.

  As described above, in the present disk drive device 1, the loading arm 51 that pulls the optical disk 2 up to the disk mounting portion 23 is positioned rigidly according to the centering position of the optical disk 2, so that the optical disk 2 can be reliably centered. it can.

  Further, in the present disk drive device 1, the centering guide 220 is positioned rigidly according to the centering position of the optical disk 2 in addition to the loading arm 51, so that the optical disk 2 can be centered more reliably.

  Furthermore, the present disk drive device 1 uses two of the contact portion 61, the contact member 205, and the guide piece 221 that are substantially evenly arranged around the turntable 23a as a rigid according to the centering position of the optical disc 2, and the rest. By urging the optical disk 2 toward the turntable 23a by one, centering can be performed more reliably. As a result, when the base unit 22 is raised to the chucking position by a slider 122 and a sub-slider 151 described later, the optical disk 2 and the turntable 23a can be chucked smoothly. Therefore, it is possible to eliminate the generation of sound due to chucking in a state where the center hole 2a of the optical disc 2 and the turntable 23a are displaced, and the load on the optical disc 2 or the turntable 23a.

  Here, during centering, if all of the three points of the contact portion 61 that supports the outer peripheral surface of the optical disc 2, the guide piece 221, and the contact member 205 are restricted to rigid, errors in the outer dimensions of the optical disc 2, There is a possibility that the centering position of the optical disk 2 may be shifted due to an accuracy error of each part, and smooth chucking cannot be performed on any optical disk 2. On the other hand, by configuring the abutting member 205 so as to be able to rotate without being rigid, it is possible to absorb the accuracy error of the optical disc 2 and the components, and to reliably center the optical disc 2. it can.

  At this time, the loading arm 51 rotatably supported by the deck portion 4a has a loading cam plate 53 that guides the engaging projection 64 integrated with the slider 122, and the slider 122 is bottomed as described later. By being supported in the sliding direction by the case 4, the positioning is achieved with respect to the main chassis 6 similarly disposed in the bottom case 4 via the loading cam plate 53 and the slider 122. The centering guide 220 is positioned with respect to the main chassis 6 by the guide piece 221 being rotationally biased by the centering guide opening 6 h of the main chassis 6. The base unit 22 provided with the turntable 23a is also supported so as to be movable up and down with respect to the main chassis 6 as will be described later. That is, the loading arm 51 and the centering guide 220 are positioned on the main chassis 6 on the one hand, and the turntable 23a is positioned on the other hand.

  Therefore, the optical disk 2 is centered on the turntable 23a that is also positioned relative to the main chassis 6 by the loading arm 51 and the centering guide 220 that are positioned relative to the main chassis 6, respectively. Therefore, it is reliably centered.

During centering, the eject arm 52 is guided by the retracting guide wall 112b of the loop cam 57 by the guide convex portion 113 of the second link arm 55 in the step of retracting the optical disc 2, whereby the first link arm 54 is moved. The locking portion 96 and the locking portion 98 formed on the main chassis 6 are brought close to each other, and the tension coil spring 56 is returned from the extended state. At this time, the eject arm 52, if poor ability to the optical disc 2, may be a biasing force as configuration for acting in the arrow b ₂ direction in which the disk mounting section 23 side. As a result, the disc drive apparatus 1 is also configured with the ejector arm 52 urged toward the disc attachment portion 23 side, the loading arm 51 and the centering guide 220 restricted by the centering position of the optical disc 2 to 3 By supporting the optical disc 2 at a point, the optical disc 2 can be centered.

As shown in FIG. 16, when the optical disk 2 is chucked, the centering guide 220 is configured such that the cam shaft 233 formed on the rotation plate 223 by the rotation piece 82 provided on the rotation support member 71 of the eject arm 52. There by being pressed, is rotated around the insertion hole 224 against the biasing force of the rotating plate 223 and a guide plate 222 tension coil spring 234, the guide piece 221 is moved in the arrow k ₂ direction. As a result, the guide piece 221 separates the guide portion 221 b from the outer peripheral surface of the optical disc 2.

Further, as described above, the loading arm 51 is rotated in the direction of the arrow a ₂ by the engagement convex portion 64 being guided by the third guide portion 66 c of the first cam groove 66 of the loading cam plate 53. The contact portion 61 is separated from the outer peripheral portion of the optical disc 2. The deck arm 200 also by the contact piece 209 of the pressing plate 202 is pressed in the arrow _{f 1} direction to the tip of the loading cam plate 53, an arm member 201 which is biased by the pressing arm 202b is in the arrow _{i 1} direction The contact member 205 attached to the arm member 201 is rotated away from the outer peripheral portion of the optical disc 2. Note eject arm 52, with the slide of the slider 122 is rotated in the arrow b ₁ direction via the operation arm 58, the supporting portion 88 and the pickup portion 90 is spaced from the outer circumference of the optical disc 2.

  As a result, the optical disk 2 chucked on the turntable 23 a is released from the arms and the centering guide 220 that support the outer periphery, and can be rotated by the disk rotation drive mechanism 24.

  As shown in FIG. 11, the drive mechanism 120 that supplies a drive force to the disk transport mechanism 50 includes a drive motor 121, a slider 122 that receives the drive force of the drive motor 121 and slides in the bottom case 4, and the drive motor 121. The gear train 123 that transmits the driving force to the slider 122 is provided on the bottom case 4 side of the main chassis 6. The drive mechanism 120 drives the disk transport mechanism 50 and the base lifting mechanism 150 by sliding the slider 122 with the drive motor 121.

Driving motor 121, the optical disc 2 is inserted to a predetermined position, the first switch SW1 is pressed by the rotation support member 71 of the eject arm 52, driven in the normal direction to move the slider 122 in the arrow f ₁ direction Is done. The drive motor 121, the eject operation is driven in the reverse direction to move the slider 122 in the direction of arrow f _2. The slider 122, depending on the loading and ejecting of the optical disc 2 by being moved in FIG. 11 in the arrow f ₁ direction or f ₂ direction, the arms and the disk transfer mechanism 50, drives the base elevating mechanism 150. The gear train 123 transmits the driving force of the driving motor 121 to the slider 122 via the rack portion 131.

  As shown in FIG. 41, the slider 122 is made of a resin member formed in a substantially rectangular parallelepiped shape as a whole, and the engagement convex portion 109 formed on the third link arm 100 is engaged with the upper surface 122a. A guide groove 125, a second guide groove 126 with which a connecting arm 165 for driving a sub-slider 151 of the base lifting mechanism 150 described later is engaged, and a pair of engaging protrusions 68, 68 formed on the loading cam plate 53. And a third guide groove 128 that engages with one end of an opening / closing arm that restricts double insertion of the optical disc 2 is omitted.

  The slider 122 is engaged with the first cam slit 130 through which the first support shaft 47 protruding from the sub-chassis 29 of the base unit 22 is inserted into the side surface 122 b on the base unit 22 side, and the gear train 123. The rack part 131 to be formed is formed. The first cam slit 130 is assembled with a first guide plate 152 that prevents the first support shaft 47 of the subchassis 29 from rattling and operates the disk rotation drive mechanism 24 stably. The slider 122 is formed with a slide guide groove 129 along the longitudinal direction on the lower surface 122c. The slide guide groove 129 is guided in a sliding direction by a pair of guide protrusions 124, 124 protruding from the bottom case 4 (see FIG. 9). ).

Such a slider 122 is disposed on the bottom surface portion of the bottom case 4 between the one side surface portion on which the deck portion 4 a of the bottom case 4 is provided and the base unit 22. The slider 122 is positioned below the optical disk 2 inserted into the housing 3 from the disk insertion / removal port 19, and the upper surface of the slider 122 has a slightly lower height than the deck section 4 a. . The slider 122 is covered with the main chassis 6 and is slid in the directions of arrows f ₁ and f ₂ which are the front and rear directions via a drive motor 121 and a gear train 123 provided on the bottom surface of the bottom case 4. Is done.

  Then, the drive mechanism 120 moves the third link arm 100 and the operation arm 58 engaged with the third link arm 100 in conjunction with the sliding operation of the slider 122 to rotate the eject arm 52. The loading cam plate 53 is moved back and forth, and the loading arm 51 is rotated. Thus, the drive mechanism 120 performs a loading operation for drawing the optical disc 2 into the housing 3 according to the slide of the slider 122 and an ejecting operation for ejecting the optical disc 2 from the disc mounting portion 23 to the outside of the disc insertion / removal opening 19. Do.

  Next, the base lifting mechanism 150 that lifts and lowers the base unit 22 in conjunction with the above-described sliding operation of the slider 122 will be described. The base lifting mechanism 150 raises the base unit 22 and chucks the optical disk 2 centered at the disk mounting position on the turntable 23a of the disk mounting portion 23. The base lifting mechanism 150 lowers the base unit 22 from the turntable 23a. A base unit 22 between a chucking release position where the optical disk 2 is detached and a recording / playback position where the base unit 22 is positioned between the chucking position and the chucking release position and a signal is recorded or reproduced on the optical disk 2. Move up and down.

  Specifically, the base elevating mechanism 150 includes a first support shaft 47 and a second support shaft 48 formed on the base unit 22 by a slider 122 and a sub-slider 151 that is slid according to the slide operation of the slider 122. The base unit 22 is moved up and down by moving it up and down. On the side surface of the slider 122 facing the base unit 22, as shown in FIG. 41, there is a first cam slit 130 in the longitudinal direction that moves the base unit 22 up and down over the chucking release position and the recording / reproducing position. It is formed over. The first cam slit 130 includes a lower horizontal surface portion 130a corresponding to the chucking release position, an upper horizontal surface portion 130b corresponding to the recording / reproducing position, and an inclined surface portion connecting the lower horizontal surface portion 130a and the upper horizontal surface portion 130b. 130c and a mounting portion 130d to which a first guide plate 152 to be described later is attached are formed, and the first support shaft 47 protruding from the sub chassis 29 of the base unit 22 is slidably inserted.

  The first cam slit 130 guides the movement of the first support shaft 47 and prevents the first support shaft 47 from rattling at the recording / reproducing position to stabilize the disk rotation drive mechanism 24. A first guide plate 152 to be operated is disposed. The first guide plate 152 is made of a leaf spring member, and an engagement hole is provided at one end 152a. The engagement hole is engaged with an engagement convex portion protruding from the attachment portion 130d of the first cam slit 130. At the same time, one end 152a is locked to a projecting piece 153 formed from the upper surface 122a of the slider 122 toward the attachment portion 130d. Further, the first guide plate 152 is formed with a locking piece 140 that is locked to a locking portion 154 provided in the first cam slit 130 at the other end 152b. Further, the first guide plate 152 moves the first support shaft 47 when the base unit 22 is raised to the chucking position above the contact point between the upper horizontal surface portion 130b and the inclined surface portion 130c. When the shaft 47 is moved to the upper horizontal surface portion 130b, a protruding portion 155 that protrudes toward the upper surface 122a of the slider 122 is formed.

  Further, the lower horizontal surface portion 130 a of the first cam slit 130 has a height slightly larger than the diameter of the first support shaft 47 and is slidably formed. On the other hand, the height of the upper horizontal surface portion 130 b with the first guide plate 152 is the same as or slightly lower than the diameter of the first support shaft 47. Therefore, when the first support shaft 47 is moved to the upper horizontal surface portion 130b, the first guide plate 152 is pressed into the first horizontal shaft portion 130b, and the first support shaft 47 is moved between the upper horizontal surface portion 130b. Hold it. Therefore, the first guide plate 152 can suppress the vibration by the spindle motor 24a of the disk rotation drive mechanism 24 provided in the base unit 22, and can rotate the optical disk 2 stably.

  Further, the first guide plate 152 holds the first support shaft 47 between the upper horizontal surface portion 130b, so that the protruding portion 155 protrudes on the upper surface 122a of the slider 122 and presses against the upper surface 6a of the main chassis 6. It is done. Therefore, the slider 122 is pressed toward the bottom case 4 by the first guide plate 152 during recording / reproduction of the optical disc 2, and the influence of vibration and disturbance due to driving of the base unit 22 can be suppressed.

  The locking piece 140 formed on the other end 152b of the first guide plate 152 is bent in a direction orthogonal to the longitudinal direction of the slider 122, and a part of the main surface portion of the other end 152b is formed. The other end 152b is formed so as to protrude in a substantially rectangular shape along the bending direction. The locking portion 154 to which the locking piece 140 is locked is provided in front of the upper horizontal surface portion 130b of the first cam slit 130, and extends in the thickness direction from the upper surface 122a of the slider 122 to the side wall 154a in the thickness direction. A slit 154b is provided. Then, as the first guide plate 152 is locked to the first cam slit 130, the other end 152b of the first guide plate 152 faces the side wall 154a and the locking piece 140, as shown in FIG. Is inserted into the slit 154b, and the upper surface 140a of the locking piece 140 can be brought into contact with the upper portion of the slit 154b.

  When the locking piece 140 is inserted into the slit 154b, the first guide plate 152 comes into contact with the upper surface 140a of the locking piece 140 and the upper part of the slit 154b when an impact is applied in the surface direction. Such an impact can be received by the slider 122 via the upper surface 140 a of the locking piece 140. Accordingly, the first guide plate 152 can be prevented from being plastically deformed even when an impact in the surface direction is applied due to a fall accident of the disk drive device 1 or the like.

  In particular, the first guide plate 152 is made of a long elastic member, and there is a risk of plastic deformation in response to a surface impact. Further, when the disk drive device 1 is shipped from the manufacturer or when the electronic device on which the disk drive device 1 is mounted is transported, the packaging is simplified to cope with an impact applied in the event of a fall accident or the like. Although necessary, the first guide plate 152 can be prevented from being deformed by forming the locking piece 140 so as to be locked to the slider 122.

The sub-slider 151 supports the second support shaft 48 projecting from the sub-chassis 29 of the base unit 22 and is engaged with the slider 122, and the loading direction of the optical disk 2 in accordance with the sliding operation of the slider 122. It is slidably disposed in FIG. 11 the arrow h ₁ direction or the arrow h ₂ orthogonal directions.

As shown in FIGS. 11 and 43, the sub-slider 151 is made of a long plate member made of synthetic resin, and a guide convex portion 157 protruding from the main chassis 6 is engaged with the upper surface 151a. An upper guide groove 158 is formed over the longitudinal direction. In the sub-slider 151, a lower guide groove 160 that engages with a guide convex portion 159 protruding from the bottom case 4 is formed in the longitudinal direction at a position partially displaced from the upper guide groove 158 of the lower surface 151c. (See FIG. 9). The sub-slider 151 is engaged with the guide protrusion 157 protruding from the main chassis 6 in the upper guide groove 158, so that the guide protrusion 157 slides in the upper guide groove 158 and the lower guide When the guide convex portion 159 protruding from the bottom case 4 is engaged with the groove 160, the guide convex portion 159 slides in the lower guide groove 160, so that the arrow h is interlocked with the sliding operation of the slider 122. It is slid in _one direction or the arrow _{h 2} direction.

  Further, the sub-slider 151 has an engaging groove 166 that is engaged with a connecting arm 165 that is connected to the slider 122, at one end in the longitudinal direction located on the slider 122 side. The engagement groove 166 is provided in an engagement piece 167 that extends in a direction orthogonal to the longitudinal direction of the sub-slider 151. Further, the sub-slider 151 has an abutment convex portion whose other end opposite to the one end where the engagement piece 167 is formed abuts against the rotation support member 71 of the eject arm 52 when the optical disk 2 is loaded. 168. As shown in FIG. 16, the abutment convex portion 168 abuts against the bent piece 81 of the rotation support member 71 when the optical disc 2 is loaded, thereby releasing the pushing arm 72 from the side surface of the optical disc 2. The rotation support member 71 is rotated in the direction, and the rotation of the rotation support member 71 is restricted so that the push arm 72 rotated to a position away from the side surface of the optical disk 2 does not rotate in the side surface direction of the optical disk 2. Accordingly, the sub-slider 151 maintains a state in which the push-out arm 72 of the eject arm 52 is released from the side surface of the optical disc 2.

  The sub-slider 151 is moved to the side surface 151b on the disk insertion / removal port 19 side together with the first cam slit 130 to move the base unit 22 up and down over the chucking position, chucking release position, and recording / reproducing position. The cam slit 170 is formed in the longitudinal direction. The second cam slit 170 connects the lower horizontal surface portion 170a corresponding to the chucking release position, the upper horizontal surface portion 170b corresponding to the recording / reproducing position, and the lower horizontal surface portion 170a and the upper horizontal surface portion 170b. An inclined surface portion 170c corresponding to the king position and an attachment portion 170d to which a second guide plate 171 to be described later is attached are formed, and the second support shaft 48 protruding from the sub chassis 29 of the base unit 22 is slidable. Is inserted.

The inclined surface portion 170c of the second cam slit 170 is provided to a position higher than the position of the upper horizontal surface portion 170b, and guides the base unit 22 to the upper horizontal surface portion 170b by descending slightly. Thus the base unit 22 is guided by the second cam slit 170, the second supporting shaft 48 is raised the inclined surface 170c from the lower side horizontal portion 170a by the sub-slider 151 slides in the arrow _{h 1} direction, It is moved from the chucking release position to the chucking position. At this time, the base unit 22 sandwiches the periphery of the center hole 2a of the optical disc 2 centered on the disc mounting portion 23 between the turntable 23a and the abutting protrusion 8 provided on the top plate portion 5a of the top cover 5. Is chucked. Further, when the sub-slider 151 is slid in the arrow h ₁ direction, since the second support shaft 48 is lowered from the inclined surface portion 170c to the upper horizontal surface portion 170b, the base unit 22 is moved from the chucking position to the recording and reproducing position .

  Similarly to the first cam slit 130, the second cam slit 170 guides the movement of the second support shaft 48 and prevents rattling of the second support shaft 48 at the recording / reproducing position. Thus, a second guide plate 171 for stably operating the disk rotation driving mechanism 24 is provided. The second guide plate 171 is made of a leaf spring member, and an engagement hole is provided at one end 171a. The engagement hole is engaged with an engagement convex portion protruding from the attachment portion 170d of the second cam slit 170. At the same time, one end 171a is locked to a projecting piece 173 formed from the upper surface 151a of the sub-slider 151 toward the mounting portion 170d. Further, the second guide plate 171 is formed with a locking piece 175 that is locked to a locking portion 174 provided in the second cam slit 170 at the other end 171b. The second guide plate 171 moves the second support shaft 48 when the base unit 22 is raised to the chucking position above the contact point between the upper horizontal surface portion 170b and the inclined surface portion 170c. When the shaft 48 is moved to the upper horizontal surface portion 170b, a protruding portion 176 that protrudes toward the upper surface 151a side of the sub-slider 151 is formed.

  Further, the lower horizontal surface portion 170 a of the second cam slit 170 has a height slightly larger than the diameter of the second support shaft 48 and is slidably formed. On the other hand, the height of the upper horizontal plane portion 170 b is the same as or slightly lower than the diameter of the second support shaft 48 with respect to the second guide plate 171. Therefore, when the second support shaft 48 is moved to the upper horizontal surface portion 170b, the second guide plate 171 is pressed into the second support shaft 48 so that the second support shaft 48 is interposed between the upper horizontal surface portion 170b. Hold it. Therefore, the second guide plate 171, together with the first guide plate 152, suppresses vibrations caused by the spindle motor 24 a of the disk rotation drive mechanism 24 provided in the base unit 22, and stably rotates the optical disk 2. Can do.

  Further, the second guide plate 171 holds the second support shaft 48 between the upper horizontal surface portion 170b, so that the protruding portion 176 protrudes on the upper surface 151a of the sub-slider 151, and on the upper surface 6a of the main chassis 6. Pressed. Therefore, the sub-slider 151 is pressed toward the bottom case 4 by the second guide plate 171 during recording / reproduction of the optical disc 2, and the influence of vibration and disturbance due to driving of the base unit 22 can be suppressed.

  The locking piece 175 formed on the other end 171b of the second guide plate 171 is bent at the other end 171b in a direction perpendicular to the longitudinal direction of the sub-slider 151, and a part of the main surface portion of the other end 171b. Is formed so as to protrude forward in the longitudinal direction in a substantially rectangular shape along the bending direction of the other end 171b. Further, as shown in FIGS. 43 and 44, the locking portion 174 to which the locking piece 175 is locked is provided in front of the upper horizontal surface portion 170b of the second cam slit 170, and from the upper surface 151a of the sub-slider 151. A slit 174b extending in the thickness direction is provided on the side wall 174a in the thickness direction. Then, when the second guide plate 171 is locked to the second cam slit 170, the other end 171b of the second guide plate 171 faces the side wall 174a and the locking piece 175 is inserted into the slit 174b. The upper surface 175a of the locking piece 175 can be brought into contact with the upper portion of the slit 174b.

  When the engaging piece 175 is inserted into the slit 174b, the second guide plate 171 is brought into contact with the upper surface 175a of the engaging piece 175 and the upper part of the slit 174b when an impact is applied in the surface direction. Such an impact can be received by the sub-slider 151 via the upper surface 175a of the locking piece 175. Accordingly, like the first guide plate 152, the second guide plate 171 can prevent plastic deformation even when an impact in the surface direction is applied due to a drop accident of the disk drive device 1 or the like.

  A connecting arm 165 that engages with the engaging groove 166 of the sub slider 151 and connects the slider 122 and the sub slider 151 has a support portion 165a provided at a substantially intermediate portion thereof rotatably attached to the main chassis 6. At the same time, the engagement convex portion 177 formed at one end 165b of the support portion 165a is movably engaged with the second guide groove 126 of the slider 122, and the engagement convex portion 178 formed at the other end 165c is sub-shaped. The slider 151 is movably engaged with the engaging groove 166 of the slider 151.

The connecting arm 165, the slider 122 is moved in the arrow _{f 1} direction, as shown in FIG. 15, by the engaging projection 177 to move the second guide groove 126 of the slider 122, the support portion 165a Is rotated in the direction of arrow l ₁ , and the engaging projection 178 slides the sub slider 151 in the direction of arrow h ₁ while moving in the engaging groove 166. The connecting arm 165, the slider 122 is moved in the direction of arrow _{f 2,} as shown in FIG. 18, by the engaging projection 177 to move the second guide groove 126, the fulcrum supporting portion 165a It is rotated in the arrow _{l 2} direction, sliding the sub-slider 151 in the arrow _{h 2} direction while engaging protrusions 178 moves the engaging groove 166.

  As shown in FIGS. 3 and 45, the disk drive device 1 includes a central hole 2a of the optical disk 2 conveyed to the centering position by the disk conveying mechanism 50 when the base unit 22 is raised to the chucking position. A guide pin 180 for guiding the base unit 22 is provided so that the disc mounting portion 23 provided in the base chassis 27 is aligned with the turntable 23a.

  As shown in FIG. 45, the guide pin 180 is erected from the bottom surface portion of the bottom case 4, and a flange portion 182 through which the guide hole 181 formed in the base chassis 27 is inserted is formed in the upper portion. The flange portion 182 has a diameter that is slightly larger than the diameter of the guide hole 181 of the base chassis 27, and includes a first guide portion 183 having an inclined surface that increases in diameter toward the upper end portion, and toward the upper end portion. A second guide portion 184 having an inclined surface with a reduced diameter is formed. The flange portion 182 is inserted into the guide wall 185 formed in the guide hole 181 while the first and second guide portions 183 and 184 are in sliding contact with each other when the base chassis 27 is moved up and down. The unit 22 is guided to the chucking position or the chucking release position.

  The guide hole 181 of the base chassis 27 through which the guide pin 180 is inserted is drilled in the vicinity of the turntable 23 a that is away from the third support shaft 49 that is the pivot point of the base unit 22. In the guide hole 181, as shown in FIG. 45, a guide wall 185 bulges out at the lower part of the base chassis 27. The guide wall 185 forms a clearance slightly larger than the diameter of the flange portion 182 of the guide pin 180, and the flange portion 182 passes through this clearance, so that the center hole 2 a of the optical disc 2 and the turntable of the disc mounting portion 23 are inserted. The base unit 22 is guided so as to be aligned with 23a.

  Specifically, as shown by a two-dot chain line in FIGS. 46 and 45A, when the base unit 22 is lowered to the chucking release position, the guide pin 180 has the flange portion 182 at the guide hole 181. It is located above. When the optical disk 2 is conveyed to the centering position, the base chassis 27 is raised, and the flange portion 182 is inserted through the guide hole 181. When the base chassis 27 is raised to the chucking position of the optical disc 2, the guide wall 185 bulging in the guide hole 181 is formed as a guide pin 180 as shown by the solid line in FIGS. The first guide portion 183 is slid, and the flange portion 182 passes through the clearance between the guide walls 185. As described above, the base chassis 27 is raised while being guided by the guide pins 180, whereby the turntable 23a of the disk mounting portion 23 is aligned with the center hole 2a of the optical disk 2 conveyed to the centering position. Therefore, the chucking can be performed smoothly without applying an excessive load to the optical disc 2 or the turntable 23a.

  Further, the guide pin 180 and the guide hole 181 are on the other end side opposite to one end in the longitudinal direction where the third support shaft 49 for supporting the rotation of the base unit 22 is provided, and in the vicinity of the disc mounting portion 23. Therefore, the deviation between the optical disk 2 conveyed to the centering position and the turntable 23a can be corrected most efficiently, and the relationship between the center hole 2a of the optical disk 2 and the turntable 23a can be surely achieved. The alignment with the mating protrusion 33a can be performed.

  48 and 45C, when the base unit 22 is lowered to the recording / reproducing position, the guide wall 185 of the guide hole 181 of the base chassis 27 is moved to the second portion of the flange portion 182. After the guide portion 184 slides and the flange portion 182 is guided to be inserted into the guide hole 181, the guide wall 185 is lowered to a position away from the flange portion 182. Thus, in the state where the base unit 22 is lowered to the recording / reproducing position, the guide pin 180 and the guide hole 181 are not in contact with each other, and therefore, the vibration from the bottom case 4 to the base chassis 27 side through the guide pin 180. And the like are prevented from being transmitted. Therefore, it is possible to prevent disturbance from being transmitted to the disk rotation driving mechanism 24 and the optical pickup 25 through the guide pins 180 and adversely affecting the recording / reproducing characteristics.

  The guide pin 180 is formed to a height that does not contact the lower surface of the optical disk 2 that is rotationally driven by the disk rotation drive mechanism 24, and there is no possibility of damaging the information recording surface of the optical disk 2.

  When the recording / reproducing operation is completed and the optical disk 2 is ejected, the base unit 22 is lowered to the chucking release position, and the optical disk 2 is pushed up from the turntable 23a by the guide pins 180, whereby the chucking is released. At this time, the base chassis 27 has the guide hole 181 positioned below the guide pin 180.

  In the disk drive device 1 to which the present invention is applied, the guide pin 180 also functions as a chucking release pin that releases chucking of the optical disk 2. That is, the guide pin 180 has a hemispherical upper end, and the guide pin 180 and the guide hole 181 of the base chassis 27 are formed in the vicinity of the center hole 2a of the optical disc 2 mounted on the turntable 23a. It is formed corresponding to the region. Thereby, when the base unit 22 is lowered to the chucking release position of the optical disc 2, the optical disc 2 is pushed up by the upper end portion of the guide pin 180, and the chucking with the turntable 23a is released. According to such a configuration, it is not necessary to use a chucking release pin for releasing chucking of the optical disk 2 in addition to the guide pins 180, so that the number of parts can be reduced and the disk drive device 1 can be reduced in weight. it can.

It is an external appearance perspective view which shows the electronic device by which the disc drive apparatus to which this invention was applied is mounted. 1 is an external perspective view showing a disk drive device to which the present invention is applied. 1 is a perspective view showing the inside of a disk drive device to which the present invention is applied. It is a perspective view which shows the disk drive apparatus which removed the main chassis. It is an external appearance perspective view which shows a top cover. It is a perspective view which shows a base unit. It is sectional drawing which shows the connection location of a base chassis and a subchassis. It is a figure for demonstrating the support structure by the damper between a base chassis and a subchassis in a base unit. It is a perspective view which shows the other example of a disk drive apparatus. It is sectional drawing which shows the other example of a disk drive apparatus. It is a top view which shows the disk drive apparatus which waits for insertion of an optical disk. It is a top view which shows the disc drive apparatus which moves to insertion operation from insertion operation. It is a top view which shows the disc drive apparatus which started drawing of the optical disc with the loading arm. It is a top view which shows the disk drive apparatus which has drawn in the optical disk. It is a top view which shows the disc drive apparatus which pulled in the optical disc to the centering position. It is a top view which shows the disk drive apparatus which is recording / reproducing with respect to an optical disk. FIG. 11 is a plan view showing a disk drive device that supports the side surface of the disk with various arms in an optical disk ejection process. It is a top view which shows the disk drive apparatus which discharges | emits an optical disk. It is a top view which shows the disc drive apparatus which conveyed the optical disk to the discharge position. It is a perspective view which shows a loading arm. It is a top view which shows a loading arm. It is a perspective view which shows a loading cam plate, (a) shows the surface side, (b) is a figure which shows a back surface side. It is a disassembled perspective view which shows an eject arm. It is a perspective view which shows an eject arm. FIG. 11 is a plan view for explaining the operation of the eject arm when there is an obstacle on the disc conveyance area in the disc ejection process. It is a perspective view which shows another eject arm. It is a perspective view which shows another eject arm from the back surface side. It is a perspective view which shows the support plate used for another eject arm. It is a figure which shows the pick-up arm of a 2nd pick-up part. It is a perspective view which shows a disk drive apparatus provided with another eject arm. It is a perspective view which shows the 2nd extrusion arm which supports an optical disk with a 2nd pick-up part. It is a perspective view which shows the 2nd extrusion arm which guides an optical disk with a 2nd pick-up. It is a perspective view which shows the latching | locking part which is provided in a main chassis and the one end part of a tension | pulling coil spring is latched. It is a figure which shows a loop cam plate, (a) is a perspective view shown from the attachment surface side to a main chassis, (b) is a perspective view shown from the formation surface side of a guide groove. It is a top view which shows the movement path | route of the guide convex part in a loop cam. It is a top view which shows the disc drive apparatus which prevents the erroneous insertion of a small diameter disc with an eject arm. It is a perspective view which shows a deck arm and a control arm. It is a top view which shows the disc drive apparatus which prevents the erroneous insertion of a small diameter disc with a deck arm. It is a disassembled perspective view which shows a centering guide. It is a perspective view which shows a centering guide. It is a perspective view which shows a 1st guide plate and a slider. It is a perspective view which shows the slider with which the 1st guide plate was latched. It is a perspective view which shows a 2nd guide plate and a sub slider. It is a perspective view which shows the sub slider with which the 2nd guide plate was latched. It is sectional drawing which shows the positional relationship of a guide pin and a guide hole, (a) is a chucking release position, (b) is a disc mounting position, (c) is a figure which shows each positional relationship in a recording / reproducing position. It is a perspective view showing a guide pin and a guide hole in a state where the base unit is lowered to the chucking release position. It is a perspective view showing a guide pin and a guide hole in a state where the base unit is raised to the chucking position. It is a perspective view showing a guide pin and a guide hole in a state where the base unit is raised to the recording / reproducing position.

Explanation of symbols

1 disk drive device, 2 optical disk, 3 housing, 4 bottom case, 5 top cover, 6 main chassis, 17 edge part, 18 front panel, 19 disk insertion / removal port, 22 base unit, 23 disk mounting part, 23a turntable, 25 optical pickup, 27 base chassis, 28 damper, 29 subchassis, 47 to 48 support shaft, 50 disk transport mechanism, 51 loading arm, 52 eject arm, 53 loading cam plate, 54 first link arm, 55 second Link arm, 56 tension coil spring, 57 loop cam, 58 operation arm, 60 insertion hole, 61 contact portion, 63 rotation support member, 66 first cam groove, 71 rotation support member, 72 push-out arm, 73 coil spring, 82 rotation , 88 support section, 90 pickup section, 96, 98 locking section, 100 third link arm, 101 small-diameter disk, 108 cam groove, 112 cam groove, 112a insertion guide wall, 112b pull-in guide wall, 112c discharge guide wall, 113 Guide convex part, 120 Drive mechanism, 122 Slider, 130 First cam slit, 140 Locking piece, 150 Base lifting mechanism, 151 Sub slider, 152 First guide plate, 154 Locking part, 165 Connecting arm, 170 Second cam slit, 171 Second guide plate, 180 guide pin, 200 deck arm, 201 arm member, 202 pressing plate, 203 coil spring, 212 regulating arm, 214 spring locking portion, 220 centering guide, 221 guide piece, 222 Guide plate, 223 Rotating plate, 234 tension coil spring, 240 second push-out arm, 241 pickup support section, 250 second pickup section, 251 pickup arm

Claims (4)

An apparatus main body provided with a disk insertion / removal port through which a disk-shaped recording medium is inserted / removed on the front side;
A disk holding unit provided in the apparatus main body and rotatably holding the disk-shaped recording medium;
A main chassis that is fixedly disposed in the apparatus main body and supports a base unit provided with an optical pickup for recording and / or reproducing information signals with respect to the disk holding unit and the disk-shaped recording medium;
An arm portion rotatably supported on one side in a plane parallel to the disc-shaped recording medium held by the disc holding portion in a direction orthogonal to the insertion / removal direction of the disc-shaped recording medium of the apparatus body; A biasing arm that is provided at a tip of the arm portion and has a support portion that supports a side surface of the disc-shaped recording medium when the disc-shaped recording medium is inserted;
An urging spring for urging the arm portion to rotate in the ejection direction of the disc-shaped recording medium;
A regulating arm for regulating the urging force against the urging arm by the urging spring to be constant;
A first centering member provided on the one side of the apparatus body and supporting a side surface of the disc-shaped recording medium when the disc-shaped recording medium is inserted;
Provided on the other side in a plane parallel to the disk-shaped recording medium held by the disk holding portion in a direction orthogonal to the insertion / removal direction of the disk-shaped recording medium of the apparatus body, and the side surface of the disk-shaped recording medium is A second centering member to support,
The positions of the first centering member and the second centering member are regulated so as to support the side surface of the disc-shaped recording medium with respect to the main chassis, and the urging arm is constantly regulated by the regulating arm. A disk drive device for supporting the disk-shaped recording medium at a centering position at three points centering on the disk holding portion by urging the disk-shaped recording medium with the urging force applied . The biasing spring has one end locked to the biasing arm and the other end locked to the restriction arm.
The regulating arm has the same direction as the urging arm in which the engaging portion of the urging spring is rotated in the retracting direction of the disc-shaped recording medium as the disc-shaped recording medium is drawn into the apparatus main body. The disk drive device according to claim 1, wherein the disk drive device is rotated by the rotation.   The first centering member is provided on the front side of the apparatus main body so as to be pivotable relative to the disk holding portion, and at the tip of the arm portion, and when the disc-shaped recording medium is inserted. A support portion for supporting the side surface of the back side of the disc-shaped recording medium in the insertion direction and drawing the disc-shaped recording medium into the main body of the apparatus, and the disc-shaped recording medium has a central hole in the vicinity of the disc holding portion. 2. The disk drive device according to claim 1, wherein the position of the disk drive is restricted with respect to the main chassis when the disk is pulled in until the disk is positioned.   The urging arm is supported on the back side of the apparatus main body with respect to the disk holding part of the deck part provided on the one side of the apparatus main body, and the urging arm is in the standby state for inserting the disk-shaped recording medium. The support portion is rotated and biased to a position biased to the one side of the apparatus main body of the disk insertion / removal port, and can be brought into contact with a small-diameter disk erroneously inserted into the apparatus main body. 2. The disc according to claim 1, wherein when inserted, the support portion supports a side surface on the front side in the insertion direction of the disc-shaped recording medium and biases the disc-shaped recording medium toward the disc insertion / removal side. Drive device.

Images