JP3958273B2 - Disk drive device - Google Patents

Description

  The present invention relates to a disk drive device including an optical pickup for reproduction for reproducing an optical disk and an optical pickup for recording / reproduction for recording or reproducing an information signal on the optical disk.

  Conventionally, an optical disk drive device has two optical pickups, one optical pickup reproduces a CD (compact disk), CD-R, CD-ROM, etc., and the other optical pickup uses a DVD (digital versatile disc). Has been proposed (see Patent Documents 1 and 2). In this disk drive apparatus, a sub-chassis provided in the apparatus main body holds various disk-shaped recording media and rotates the disk rotation drive unit, and a first reproducing information signal recorded on a DVD. A pickup device, a second pickup device that reproduces a CD, CD-R, and CD-ROM, and a skew adjustment mechanism that performs skew adjustment of the first and second pickup devices are provided.

  The sub-chassis is formed in a substantially rectangular shape, and a damper member such as a rubber bush is attached in the vicinity of each corner portion. The sub-chassis is provided with an anti-vibration property by being disposed in the apparatus main body via the damper member. On the subchassis, a disk rotation drive unit is provided at a substantially central portion, and the first and second pickup devices are opposed to each other with a predetermined angle between the disk rotation drive unit. Has been.

  The disk drive unit that rotatably holds the various disk-shaped recording media includes a disk table on which the disk-shaped recording medium is placed and a spindle motor, and the disk table is attached to the spindle shaft of the spindle motor. Then, the disk-shaped recording medium placed on the disk table is rotationally driven at a constant linear velocity or angular velocity. The disk rotation drive unit is provided at a substantially central portion of the sub chassis.

  The first pickup device for reproducing a DVD is supported by a pair of guide shafts provided in parallel to the longitudinal direction of the subchassis and is movable in the radial direction of the DVD by a pickup feeding mechanism. . Further, the first pickup device includes a pickup body having a semiconductor laser that outputs laser light having a wavelength of 650 nm or 635 nm, and a skew sensor.

  A second pickup device for reproducing a CD, CD-R, and CD-ROM is supported by the pair of guide shafts provided in parallel to the longitudinal direction of the subchassis and is used in the radial direction of the CD or the like by the pickup feed mechanism It can be moved over. The second pickup device also includes a pickup body having a semiconductor laser that outputs laser light having a wavelength of 780 nm.

  In this disk drive device, when a disk-shaped recording medium is held on a disk table, the type is detected, and the first pickup device or the second pickup device that meets the specifications is selected. Then, laser light of a predetermined wavelength is irradiated by the first or second pickup device selected according to the type of the inserted disc-shaped recording medium, and the information signal is reproduced. In addition, the skew of the reproduction laser beam based on the skew detection hole is detected by a skew sensor provided in the first pickup device, and one of the pair of guide shafts is driven by a skew adjustment mechanism. As a result, the inclination of the objective lens is adjusted and the skew is adjusted in each pickup body of the first and second pickup devices supported by the pair of guide shafts.

  In such a disk drive device, a pair of guide shafts are extended on the sub-chassis, and the first and second pickup devices supported by the pair of guide shafts are arranged on the same sub-chassis. The height positions of the first and second pickup devices can be accurately defined. Therefore, the disk drive device can accurately position the first pickup device and the second pickup device with respect to the disk-shaped recording medium without requiring a troublesome adjustment operation.

  However, in this disk drive device, a damper member for seismic isolation of the subchassis is provided in the vicinity of each corner portion, whereas a spindle motor serving as a vibration source is disposed at a substantially central portion of the subchassis. . Therefore, the vibration source and the damper member are separated from each other, and vibration cannot be effectively absorbed. Further, since the damper member is provided in the vicinity of each corner portion of the sub-chassis, the first and second optical pickup devices are moved to the inner peripheral surface side of the disk-shaped recording medium and approach the spindle motor that becomes a vibration source. Accordingly, the damper member and the first and second optical pickup devices are separated from each other, and there is a high possibility that the recording or reproducing operation of the information signal is affected by the vibration of the spindle motor.

JP-A-9-282671 JP-A-9-282672

  Therefore, the present invention provides a disk drive device in which two optical pickup devices are arranged opposite to each other with a spindle motor serving as a vibration source interposed therebetween, effectively suppressing vibration by the spindle motor, An object of the present invention is to provide a disk drive device that suppresses the influence on the reproduction operation.

  In order to solve the above-described problem, a disk drive device according to the present invention is disposed in the middle of a base frame, a substantially rectangular base chassis attached on the base frame, and a longitudinal direction of the base chassis, A disk rotation drive unit having a disk table for holding a disk-shaped recording medium, a spindle motor connected to the disk table and rotating the disk table, and the disk table disposed on one end side in the longitudinal direction of the base chassis A first optical pickup device that records and / or reproduces information signals to and from the disk-shaped recording medium placed on the base chassis, and extends from approximately the middle in the longitudinal direction of the base chassis to one end. A pair for guiding the first optical pickup device over the inner and outer circumferences of the disc-shaped recording medium. A first optical pickup mechanism having a first guide shaft and a first pickup moving mechanism for moving the first optical pickup device along the pair of first guide shafts; and the first light. A second optical pickup device that records and / or reproduces an information signal with respect to the disk-shaped recording medium placed opposite to the pickup mechanism and placed on the disk table; A pair of second guide shafts extending from the middle to the other end side for guiding the second optical pickup device over the inner and outer circumferences of the disc-shaped recording medium, and the pair of second guide shafts And a second optical pickup mechanism having a second pickup moving mechanism for moving the second optical pickup device along the second chassis. A pair of first damper members are provided on the outer peripheral sides of the first and second guide shafts for guiding the movement of the recording medium in the inner and outer peripheral directions, and the inner sides of the first and second guide shafts A pair of second damper members are provided on the circumferential side.

  According to the disk drive device as described above, when the first and second optical pickup devices are moved to the inner peripheral side approaching the spindle motor serving as the vibration source, the first damper member together with the spindle motor serving as the vibration source. And since it is enclosed by the 2nd damper member, the vibration by a spindle motor can be prevented more effectively. In addition, when the first and second optical pickup devices are moved to the outer peripheral side away from the spindle motor that is a vibration source, the first and second optical pickup devices have the pair of first damper members and at least one of the first damper members. Since the second damper member is surrounded by at least three damper members, it is possible to prevent the influence of vibration by the spindle motor.

  Hereinafter, a disk drive device to which the present invention is applied will be described in detail with reference to the drawings. A disk drive device 1 to which the present invention is applied is a drive device that records and reproduces information signals on a plurality of types of disk-shaped recording media such as CDs and DVDs. As shown in FIG. A recording / reproducing unit 4 that holds the disk-shaped recording medium 3 rotatably and records and reproduces content data, an operating system, browsing software, an e-mail program, a communication protocol, various application programs, audio data, movie data, etc. Is stored.

  In this disk drive device 1, for example, a read-only disk-shaped recording medium 3 such as a CD or a DVD-ROM is mounted on a recording / reproducing unit 4, and recorded game software, other application programs, video data, audio data, etc. By reading the content data such as, it is output to a monitor device such as a television. In addition, the disk drive device 1 has a writable disk-shaped recording medium 3 such as a CD-R, CD-RW, DVD-R, DVD-RAM, DVD + RW, DVD-RW, etc. mounted on a recording / reproducing unit 4 and a hard disk drive Content data such as application programs, video data, and audio data stored in a memory such as 5 can be written and stored in a format corresponding to the type of the loaded disk-shaped recording medium.

  Further, the disk drive device 1 includes two optical pickup mechanisms as will be described later, and the first optical pickup mechanism reproduces the first disk-shaped recording medium 3a on which various content data are recorded in the first format. The second optical pickup mechanism is used exclusively, and the second optical pickup mechanism reproduces the second disc-shaped recording medium 3b on which the various content data is recorded in the second format, and the various content data in the second format. Used for recording on the recording medium 3b.

  In the disk drive apparatus 1, a recording / reproducing unit 4 is disposed on the front surface 2a side of the apparatus body 2, and a hard disk drive 5, a power supply unit (not shown), and the like are disposed on the rear surface 2b side. On the front surface 2 a of the apparatus main body 2, there is provided a disc insertion slot 7 through which the disc-shaped recording medium 3 mounted on the recording / reproducing unit 4 is inserted and ejected. The disc-shaped recording medium 3 inserted from the disc insertion slot 7 is conveyed to the back surface 2b side of the apparatus main body 2 by a conveyance mechanism (not shown) and loaded onto the recording / reproducing unit 4. When the recording or reproduction of the content data is completed, the conveyance mechanism Thus, it is conveyed to the front surface 2 a side of the apparatus main body 2 and is ejected from the disk insertion opening 7.

  A transport mechanism for transporting the disc-shaped recording medium 3 from the disc insertion port 7 to the inside and outside of the apparatus main body 2 is provided in the vicinity of the disc insertion port 7 and is in the surface direction or both side surface directions of the disk-shaped recording medium 3. A pair of extended conveying rollers and the front surface 2a to the back surface 2b of the apparatus main body 2 are extended to support the side surface and the upper and lower surfaces or side surfaces of the outermost peripheral side of the disk-shaped recording medium 3, and the apparatus main body 2 And a pushing member for pushing the disc-shaped recording medium 3 toward the disc insertion slot 7 when ejected. When it is detected that the disc-shaped recording medium 3 has been inserted into the disc insertion slot 7, the transport roller rotates while pinching the upper and lower surfaces or side surfaces of the disc-shaped recording medium 3, and the back surface 2b of the apparatus main body 2 is rotated. Transport to the side. Further, when the disk-shaped recording medium 3 is discharged, the disk-shaped recording medium 3 is pushed out to the front surface 2a side by the pushing member, and is discharged out of the disk insertion port 7 by being reversed while being held by the conveying roller.

  Next, the recording / reproducing unit 4 that records and reproduces content data on a disc-shaped recording medium will be described. 2 and 3 are perspective views showing the recording / reproducing unit 4 from the back surface 2b side of the apparatus main body 2. FIG.

  As shown in FIG. 2, the recording / reproducing unit 4 includes a pair of upper and lower base frames 10 constituting a unit outer casing, and a recording / reproducing mechanism 11 housed in the base frame 10. As shown in FIG. 3, the recording / reproducing mechanism 11 includes a base chassis 12 on which various components are provided, a disk rotation drive unit 13 that is provided on the base chassis 12 and rotates the disk-shaped recording medium 3, and a base chassis. 12, a first optical pickup mechanism 14 for reproducing content data recorded on the disc-shaped recording medium 3, a sub-chassis 15 provided on the base chassis 12, and a disc-shaped recording medium provided on the sub-chassis 15 3 has a second optical pickup mechanism 16 for recording and reproducing content data.

  The base frame 10 forms an outer casing of the recording / reproducing unit 4 by abutting the upper and lower frames 18 and 19, and houses the recording / reproducing mechanism 11 therein. The upper frame 18 of the base frame 10 is formed with an opening for projecting a disk table of the disk rotation driving unit 13 described later to the upper surface 18 a side of the upper frame 18. In the base frame 10, the disk-shaped recording medium 3 is freely rotated on the upper surface 18 a of the upper frame 18 by loading the disk-shaped recording medium 3 onto a disk table protruding outward from the upper surface 18 a of the upper frame 18. Retained. In addition, a circuit board 17 on which a base chassis 12 of the recording / reproducing mechanism 11 and a drive circuit of the recording / reproducing mechanism 11 are formed is disposed on the lower frame 19 of the base frame 10.

  As shown in FIGS. 3 and 4, the base chassis 12 of the recording / reproducing mechanism 11 housed in the base frame 10 is formed in a substantially rectangular plate shape, and a first optical pickup mechanism 14 and a subchassis described later. The outer peripheral wall 21 rises and is formed on the outer peripheral portion excluding the vicinity of the corner portion of the mounting surface 20 and the mounting surface 20 to which the 15 and the second optical pickup mechanism 16 are mounted. The mounting surface 20 is formed with first and second openings 22 and 23 for moving the pickup bases of the first and second optical pickup mechanisms 14 and 16 on both sides in the longitudinal direction. A mounting portion 24 in which the spindle motor of the disk rotation driving unit 13 is disposed is formed in the intermediate portion.

  In the following description, the longitudinal direction of the base chassis 12 is the left-right direction, and the short direction of the base chassis 12 orthogonal to the longitudinal direction is the front-rear direction. 3 and 4, the first optical pickup mechanism 14 is disposed in the first opening 22 formed on the right side of the base chassis 12, and the sub-chassis 15 and the second optical pickup mechanism 16 are The second opening 23 is formed on the left side of the base chassis 12. 3 and 4 are perspective views showing the base chassis 12 from the rear surface 12b side. As shown in FIG. 1, the base chassis 12 is arranged with the front surface 12a facing the front surface 2a side of the apparatus main body 2. FIG. Established.

  On the right side surface 12c side of the base chassis 12, a pair of first attachment portions 29, 29 to which a first skew adjustment mechanism 80 for adjusting the skew of the first optical pickup mechanism 14 is attached are formed to be separated in the front-rear direction. Has been. Further, the base chassis 12 has damper openings 31 and 32 for attaching damper members, which will be described later, in the vicinity of both corners of the attachment surface 20 on the right side surface 12c side. These damper openings 31 and 32 are positioned on the outer peripheral side of the disc-shaped recording medium 3 placed on the disc rotation driving unit 13, and the vibration of the first optical pickup device 50 moved to the outer peripheral side is detected. The outer periphery side dampers 141 and 142 to prevent are attached.

  On the left side surface 12d side of the base chassis 12, a second attachment portion to which a second skew adjustment mechanism 130 that adjusts the skew of the second optical pickup mechanism 16 by adjusting the attachment angle of a sub chassis 15 described later is attached. 30 is biased toward the rear surface 12b. In the vicinity of the second mounting portion 30, a locking hole 38 for locking the other end of a biasing member such as a torsion coil spring whose one end is locked to the sub chassis 15 is formed. In the base chassis 12, the sub chassis 15 is always urged toward the base chassis 12 by the urging force of the urging member. Further, the base chassis 12 has damper openings 33 and 34 for attaching damper members to be described later, in the vicinity of both corners of the mounting surface 20 on the left side surface 12d side. The damper openings 33 and 34 are also located on the outer peripheral side of the disc-shaped recording medium 3 placed on the disc rotation driving unit 13, and the vibration of the second optical pickup device 100 moved to the outer peripheral side is detected. The outer periphery side dampers 143 and 144 to prevent are attached.

  The mounting portion 22 formed at a substantially intermediate portion in the longitudinal direction is formed between the first and second openings from the front surface 12a side to the rear surface 12b side in the front-rear direction of the base chassis 12. . In the mounting portion 24, damper openings 35 and 36 for attaching damper members to be described later are formed at the end portion on the front surface 12a side and the end portion on the rear surface 12b side of the base chassis 12. The damper openings 35 and 36 are located on the inner peripheral side of the disc-shaped recording medium 3 placed on the disc rotation driving unit 13, and the first and second optical pickups moved to the inner peripheral side. Inner peripheral side dampers 145 and 146 are attached to prevent vibration of the devices 50 and 100. The mounting portion 24 is formed with a circular mounting opening 37 for mounting a spindle motor 42 (described later) in a substantially intermediate portion.

  Next, the disk rotation driving unit 13 attached to the mounting unit 24 of the base chassis 12 will be described. The disk rotation drive unit 13 holds and rotates the disk-shaped recording medium 3 inserted into the disk drive device 1.

  The disk rotation drive unit 13 includes a disk table 41 on which the disk-shaped recording medium 3 is mounted, a spindle motor 42 that rotates the disk table 41, and a mounting substrate on which the spindle motor 42 is mounted and attached to the mounting unit 24. 43. The disc table 41 is formed with a disc-shaped disc mounting portion 41 a and a centering portion 41 b for centering the disc-shaped recording medium 3 by being inserted through the center hole of the disc-shaped recording medium 3. The spindle motor 42 that rotates the disk table 41 is rotatably connected to the disk table 41 by connecting the tip of a spindle shaft (not shown) to the centering portion 41 of the disk table 41. The mounting board 43 on which the spindle motor 42 is mounted is made of a rigid board, and a wiring pattern for transmitting a control signal for controlling the driving of the spindle motor 41 is formed. The mounting substrate 43 is disposed at a substantially central portion in the left-right direction of the base chassis 12 by, for example, being screwed to the mounting portion 24. At this time, the lower end portion of the spindle motor 42 is inserted into a mounting opening 37 formed in the mounting portion 24.

  The disk rotation drive unit 13 rotates the spindle motor 42 when the disk-shaped recording medium 3 is chucked on the disk table 41, and the disk table 41 and the disk-shaped recording medium 3 are moved along with the rotation of the spindle motor 41. Rotates together.

  Next, the first optical pickup mechanism 14 provided on the right side surface 12c side of the base chassis 12 will be described. The first optical pickup mechanism 14 is used as a reproduction-only pickup for the first disc-shaped recording medium 3a on which various content data are recorded in the first format.

  The first optical pickup mechanism 14 includes a first optical pickup device 50 that reproduces content data from the first disc-shaped recording medium 3a, and a pair of guides that guide the movement of the first optical pickup device 50. The shafts 60 and 61 and the pickup moving mechanism 70 that moves the first optical pickup device 50 along the guide shafts 60 and 61 are provided.

  The first optical pickup device 50 includes a rectangular pickup base 51 that constitutes a pickup body, and at least a light source (not shown) such as a semiconductor laser and a light beam emitted from the light source are disc-shaped on the pickup base 51. An objective lens 52 that converges and irradiates the signal recording surface of the recording medium 3, a photodetector (not shown) that detects return light reflected from the recording surface of the disc-shaped recording medium 3, and the objective lens 52 are connected to the disc-shaped recording medium 3. A driving system for driving in the focusing direction and the tracking direction is disposed, and a cover member 53 having an opening for facing the objective lens 52 outward is attached. In the first optical pickup mechanism 14, an engagement piece 54 to be engaged with a guide shaft 60 described later is formed on one end side 51a in the longitudinal direction of the pickup base 51, and a guide shaft 61 described later is formed on the other end 51b. An insertion hole 55 for insertion is formed. The pickup base 51 is attached with a flexible wiring board on which a drive circuit for controlling the drive system of the objective lens 52 is formed.

  The other end side 51b of the pickup base 51 is provided with an engaging member 56 that engages with a lead screw 71 of a pickup moving mechanism 70 that moves the pickup base 51 in the radial direction of the disc-shaped recording medium 3. Yes. The engaging member 56 is formed with an engaging protrusion 57 that engages with the thread groove of the lead screw 71, and when the lead screw 71 is rotated, the engaging protrusion 57 is moved in the thread groove forming direction. As a result, the pickup base 51 is moved along the guide shafts 60 and 61.

  The guide shafts 60 and 61 for guiding the movement of the pickup base 51 are arranged in parallel to each other along the longitudinal direction of the base chassis 12 and are arranged so as to straddle the first opening 22. The guide shafts 60, 61 are supported by bearing members 62, 63 provided at one end portions 60 a, 61 a that are spaced apart from each other on the mounting portion 24 formed at a substantially central portion in the longitudinal direction of the base chassis 12. The other ends 60b and 61b are supported by bearing grooves 63a and 63b of the bearing wall 63 formed on the mounting surface 20 on the right side 12c side of the base chassis 12. In addition, the guide shafts 60 and 61 are engaged with a first skew adjustment mechanism 80 described later at the other end portions 60b and 61b.

  Such a guide shaft 60 is engaged with an engagement piece 54 provided on one end side 51 a of the pickup base 51, and the guide shaft 61 is inserted into an insertion hole 55 provided on the other end side 51 b of the pickup base 51. As a result, the movement of the pickup base 51 in the radial direction of the disk-shaped recording medium 3 is guided.

  The pickup moving mechanism 70 that moves the pickup base 51 along the guide shafts 60 and 61 when the engaging member 56 of the pickup base 51 is engaged is a lead screw that is engaged with the engaging member 56 of the pickup base 51. 71 and a screw motor 72 that rotationally drives the lead screw 71. The lead screw 71 is supported by the bearing plate 73 at the distal end and the proximal end. The lead screw 71 and the screw motor 72 are fixed to the rear surface 12 b side of the first opening 22 of the base chassis 12 by screwing the bearing plate 73 to the base chassis 12.

  In the lead screw 71, the engaging protrusion 57 formed on the engaging member 56 of the pickup base 51 is engaged with the thread groove formed on the screw body as described above. Then, the pickup moving mechanism 70 drives the engagement member 56 in the screw groove forming direction by appropriately rotating the lead screw 71 in the normal direction or the reverse direction, so that the pickup base 51 is moved to the inner peripheral side of the disc-shaped recording medium 3. Or move to the outer periphery.

  Next, the first skew adjustment mechanism 80 that performs skew adjustment of the first optical pickup device 50 will be described. The first skew adjustment mechanism 80 is attached to first attachment portions 29 and 29 formed on the right side surface 12c side of the attachment surface 20 so as to be separated from each other in the front-rear direction corresponding to the pair of guide shafts 60 and 61. . As shown in FIG. 5, the first skew adjusting mechanism 80 places the other end portions 60b and 61b of the guide shafts 60 and 61 on the inclined surface and rotates the other end portions 60b and 61b. Elevating cams 81, 81 that slide up and down by sliding on an inclined surface, and a control plate 82 that presses the other end portions 60b, 61b against the inclined surface side of the elevating cams 81, 81 and controls rotation of the elevating cams 81, 81 Have

  As shown in FIG. 5, the elevating cams 81, 81 surround the substantially disc-shaped rotating portion 83, the shaft portion 84 standing at the center of the rotating portion 83, and the base end portion of the shaft portion 84. An inclined surface 85 provided is formed. The disc-shaped rotating portion 83 is formed with a locking recess 86 that locks the regulating protrusion 87 of the control plate 82 over the outer peripheral surface. FIG. 5 shows a lifting cam 81 and a control plate 82 that lift and lower a guide shaft 61 provided on the rear surface 12b side of the base chassis 12.

  The raising and lowering cams 81 and 81 are restricted from rotating when the restriction protrusions 87 of the control plate 82 are locked to the locking recesses 86. The shaft portion 84 erected at the center portion of the rotation portion 83 is formed of a hollow cylinder, and the first attachment portion 29 formed on the right side surface 12c side of the base chassis 12 is rotatably inserted from the lower surface side. Therefore, the elevating cams 81 and 81 are rotated in the arrow U direction or the counter arrow U direction in FIG. 5 about the first mounting portion 29 as an axis. The shaft portion 84 is rotated by being opened in a polygonal shape on the upper surface side and being engaged with a skew adjustment jig (not shown). The inclined surface 85 surrounding the base end portion of the shaft portion 84 is formed so as to gradually descend from the part of the rotating portion 83 along the outer periphery of the rising shaft portion 84 and is rotated integrally with the disc portion 83. Further, the inclined surface 85 is pressed at the other end portions 60b and 61b of the guide shafts 60 and 61 by a control plate 82 described later. Therefore, when the rotating part 83 is rotated by operating the shaft part 84 by the skew adjusting jig, the lifting cams 81 and 81 are moved relative to the inclined surface 85 by the other end parts 60b and 61b of the guide shafts 60 and 61. And the inclination of the guide shafts 60 and 61 is adjusted. Specifically, the lifting cams 81 and 81 raise the other end 61b of the guide shaft 61 when the rotating portion 83 is rotated in the direction of arrow U in FIG. 5, and the rotating portion 83 is in the direction opposite to the arrow U in FIG. When rotated, the inclination of the guide shaft 61 is adjusted by lowering the other end portion 61 b of the guide shaft 61. The guide shaft 60 is also similar to the raising / lowering operation of the guide shaft 61.

  A control plate 82 that presses the other end portions 60b and 61b of the guide shafts 60 and 61 to the inclined surface side of the elevating cams 81 and 81 and controls the rotation of the elevating cams 81 and 81 is formed in a substantially rectangular shape and is longitudinally The control projections 87 and 87 for restricting the rotation of the elevating cam 81 at the both ends of the shaft, the openings 88 and 88 for causing the upper surface of the shaft portion 84 to face outward, and the guide shafts 60 and 61 are inclined surfaces of the elevating cam 81. And pressing pieces 89 and 89 that press against 85.

  The restricting protrusion 87 is urged in the direction of arrow S in FIG. 5 and is engaged with an engaging recess 86 formed in the rotating portion 83 of the elevating cam 81 to restrict the rotation of the elevating cam 81 and skew. When the lifting cam 81 is rotated by the adjusting jig, the lifting cam 81 is sequentially locked to the locking recess 86 while being elastically displaced in a direction opposite to the arrow S in FIG.

  When the opening 88 faces the upper surface of the shaft portion 84 of the lifting cam 81 outward, the skew adjusting jig is engaged with the shaft portion 84 through the opening 88 and the lifting cam 81 is rotated.

  The pressing piece 89 presses the other end portions 60 b and 61 b of the guide shafts 60 and 61 against the inclined surface 85 of the lifting cam 81 by being biased in the direction of arrow P in FIG. Thus, the pressing piece 89 causes the guide shafts 60 and 61 to slide relative to the inclined surface 85 as the elevating cam 81 rotates. As a result, the other ends 60 b and 61 b of the guide shafts 60 and 61 are lifted and lowered according to the rotation amount of the lifting cam 81.

  The first skew adjustment mechanism 80 as described above performs skew adjustment of the first optical pickup device 50 at the time of manufacture and shipment of the disk drive device 1. Specifically, the first disk-shaped recording medium 3a recorded in the first format as a sample is placed on the disk table 41, and when it is rotated, it is mounted on the first optical pickup device 50. The laser light emitted from the light emitting element is reflected on the signal recording surface of the first disk-shaped recording medium 3, and is detected by a photodetector that receives the reflected laser light. When the laser light detected by the photodetector is output to the differential amplifier circuit, differential amplification is performed, and a skew error signal whose signal level changes according to the inclination of the optical axis of the laser light is generated. In the first skew adjustment mechanism 80, a skew adjustment jig is engaged with the shaft portion 84 of the elevation cam 81, and the rotation portion 83 of the elevation cam 81 is minimized by the skew adjustment jig so that the skew error signal is minimized. Is rotated in the direction of the arrow U or the counter arrow U in FIG.

  When the elevating cam 81 is rotated, one or both of the guide shafts 60 and 61 slide on the inclined surface 85 of the elevating cam 81, and the other end portions 60 b and 61 b are operated up and down. Tilt is adjusted. Thereby, the skew adjustment of the first optical pickup device 50 supported by the guide shafts 60 and 61 is performed.

  Here, as described above, the first optical pickup device 50 is used exclusively for reproduction of the first disc-shaped recording medium 3a on which various content data is recorded in the first format, and will be described later. It is not used for recording and reproduction with respect to the second disc-shaped recording medium 3b in the format of. Therefore, the first optical pickup device 50 is not required to perform high-definition skew adjustment performed when recording on the disk-shaped recording medium 3, and the first skew adjustment mechanism 80 at the time of manufacture and shipment of the disk drive device 1 causes the skew to be corrected. After the coarse adjustment is performed, the skew adjustment is not performed.

  Next, the sub-chassis 15 provided on the second opening 23 formed on the left side of the base chassis 12 and provided with the second optical pickup mechanism 16 will be described. The sub-chassis 15 supports the second optical pickup mechanism 16 and is tilt-adjusted together with the sub-chassis 15 by the second skew adjustment mechanism 130 attached to the base chassis 12, thereby the second optical pickup. A highly accurate skew adjustment of the mechanism 16 is performed.

  As shown in FIG. 4, the subchassis 15 is formed in a substantially rectangular shape, and includes a main surface portion 90 and a pickup opening portion 91 provided in the main surface portion 90 and corresponding to the moving region of the second optical pickup mechanism 16. Have.

  The main surface 90 is formed with a damper opening 92 in which a damper member faces upward corresponding to a damper opening 36 provided on the outer peripheral portion at the corner on the rear surface 12b side. Further, the sub-chassis 15 has an outer peripheral wall 93 formed on an outer peripheral portion of the main surface portion 91 excluding a substantially intermediate portion in the front-rear direction. On the front surface 93a and rear surface 93b side of the outer peripheral wall 93, there are formed rotation support portions 94, 94 serving as the rotation center of the sub chassis 15 whose inclination is adjusted by a second skew adjustment mechanism 130 described later. The rotation support portions 94, 94 are formed with insertion holes 94 a, 94 a, and the insertion holes 94 a, 94 a are connected to the connection hole 25 formed in the outer peripheral wall 21 on the front surface 12 a and rear surface 12 b side of the base chassis 12. In addition, by inserting a screw or the like, the outer peripheral wall 21 of the base chassis 12 is rotatably connected.

  The pickup opening 91 is an area in which a second optical pickup mechanism 16 to be described later is moved in the radial direction of the disc-shaped recording medium 3, and an opening 97 having an opening on the right edge 91 a side is formed. Yes. When the sub chassis 15 is disposed on the base chassis 12, the opening portion 97 is positioned with the disk table 41 and the spindle motor 42 of the disk rotation driving unit 13. The pickup opening 91 has a connecting portion 95 formed in the vicinity of the right edge portion 91a in the front-rear direction. In addition, the pickup opening 91 is formed with a motor installation groove 91b in which the feed motor 122 of the second pickup moving mechanism 120 for moving the second optical pickup mechanism 16 is arranged in the vicinity of the left edge 91c. ing. The connecting portion 95 increases the rigidity of the subchassis 15 by connecting between the opening portions 97 of the pickup opening 91, and contributes to the rigidity of the base chassis 12 as a whole. In the connecting portion 95, both base end portions 95 a extending in the front-rear direction are inclined toward the base chassis 12, so that the main body portion 95 b extending between the base end portions 95 a is below the second opening 23 of the base chassis 12. And is retracted from the movement locus of the second optical pickup mechanism 16.

  In addition, the sub chassis 15 has a skew adjustment shaft 96 protruding from the left side edge 91c of the pickup opening 91 that is adjusted by a second skew adjustment mechanism 130 described later on the base chassis 12 side. The skew adjustment shaft 96 is moved up and down by sliding the skew adjustment cam 131 of the second skew adjustment mechanism 130 to adjust the inclination of the subchassis 15. Further, in the vicinity of the skew adjustment shaft 96, a locking hole 99 is formed in which the other end of a biasing member 98 such as a torsion coil spring whose one end is locked in the locking hole 38 of the base chassis 12 is locked. ing. The sub chassis 15 is always urged toward the base chassis 12 by the urging member 98.

  Next, the second optical pickup mechanism 16 disposed on the sub chassis 15 will be described. The second optical pickup mechanism 16 is used for recording or reproducing content data with respect to the second disc-shaped recording medium 3b in which various content data is recorded in the second format.

  The second optical pickup mechanism 16 is a pair for guiding the movement of the second optical pickup device 100 and the second optical pickup device 100 that records or reproduces content data on the second disc-shaped recording medium 3b. Guide shafts 110 and 111, and a pickup moving mechanism 120 that moves the second optical pickup device 100 along the guide shafts 110 and 111.

  The second optical pickup device 100 includes a substantially rectangular pickup base 101 that constitutes a pickup main body. At least a light source (not shown) such as a semiconductor laser and a light beam emitted from the light source are applied to the pickup base 101 on a disk. An objective lens 102 that converges and irradiates the signal recording surface of the disk-shaped recording medium 3, a photodetector (not shown) that detects return light reflected from the recording surface of the disk-shaped recording medium 3, and the objective lens 102 is a disk-shaped recording medium. Drive system for driving in the focusing direction 3 and the tracking direction 3 and a skew detection unit 108 for detecting skew of the second optical pickup device 100. In the second optical pickup mechanism 16, an engagement piece 104 to be engaged with a guide shaft 110 described later is formed on one end side 101a in the longitudinal direction of the pickup base 101, and a guide shaft 111 described later is formed on the other end 101b. An insertion hole 105 for insertion is formed. The pickup base 101 is attached with a flexible wiring board on which a drive circuit for controlling the drive system of the objective lens 102 is formed.

  Further, the other end side 101 b of the pickup base 101 is provided with a rack member 106 that engages with the gear mechanism 121 of the pickup moving mechanism 120 that moves the pickup base 101 over the radial direction of the disc-shaped recording medium 3. . The pickup base 101 is moved along the guide shafts 110 and 111 by being moved integrally with the rack member 106 when the gear mechanism 121 is rotated.

  Guide shafts 110 and 111 for guiding the movement of the pickup base 101 are arranged in parallel to each other along the longitudinal direction of the base chassis 12, and the second opening 23 of the base chassis 12 and the pickup opening of the sub chassis 15. 91 is arranged to straddle the top. The guide shafts 110 and 111 are respectively supported by bearing members 112 and 113 having one end portions 110a and 111a spaced from each other on the main surface portion 90 in the vicinity of the opening portion 97 of the pickup opening portion 91, and the other end portion 110b. 111b are supported by bearing members 114, 115 formed on the main surface 90 on the left edge 91c side of the pickup opening 91.

  Such a guide shaft 110 is engaged with an engagement piece 104 provided on one end side 101 a of the pickup base 101, and the guide shaft 111 is inserted into an insertion hole 105 provided on the other end side 101 b of the pickup base 101. As a result, the movement of the pickup base 101 in the radial direction of the disk-shaped recording medium 3 is guided.

  When the rack member 106 of the pickup base 101 is engaged, the pickup moving mechanism 120 that moves the pickup base 101 along the guide shafts 110 and 111 includes a gear mechanism 121 that is engaged with the rack member 106 of the pickup base 101. And a feed motor 122 that rotationally drives the gear mechanism 121. The gear mechanism 121 and the feed motor 122 are fixed to the front surface 12 a side of the second opening 23 of the base chassis 12 by being screwed to the mounting surface 20 of the base chassis 12 or the main surface portion 90 of the subchassis 15. ing.

  As described above, the gear mechanism 121 is engaged with the rack member 106 provided integrally with the pickup base 101. The pickup moving mechanism 120 feeds the pickup base 101 to the inner peripheral side of the disc-shaped recording medium 3 by feeding the rack member 106 in the left-right direction by appropriately rotating the gear mechanism 121 forward or backward by the feed motor 122. Move to the outer circumference.

  Next, the second skew adjustment mechanism 130 that performs skew adjustment of the second optical pickup device 100 will be described. The second skew adjustment mechanism 130 is attached to the second attachment portion 30 provided on the left side 12d side of the base chassis 12 and biased to the rear surface 12b side. As shown in FIG. 6, the second skew adjustment mechanism 130 adjusts the inclination of the subchassis 15 by relatively sliding the tip of the skew adjustment shaft 96 of the subchassis 15 on the inclined surface. The cam 131 includes a skew adjustment motor 132 that rotates the skew adjustment cam 131, and a gear mechanism 133 that transmits the rotational force of the skew adjustment motor 132 to the skew adjustment cam 131.

  As shown in FIG. 6, the skew adjusting cam 131 is formed with a substantially disc-shaped rotating portion 134 and an inclined portion 135 erected on the main surface portion of the rotating portion 134 in the circumferential direction of the rotating portion 134. Yes. The substantially disk-shaped rotating portion 134 has an engaging portion 136 that engages with the gear mechanism 133 on the outer peripheral surface. Therefore, the rotating part 134 is rotated by the driving force of the skew adjusting motor 132 transmitted through the gear mechanism 133 engaged with the engaging part 136. Further, the rotation portion 134 is formed with an insertion hole (not shown) in the center, and is rotatably supported by the base chassis 12 by inserting the second attachment portion 30 formed in the base chassis 12.

  In addition, the inclined portion 135 is formed so as to rise in the circumferential direction of the rotating portion 134, and an inclined surface 135a is formed on the upper surface portion on which the skew adjusting shaft 96 protruding from the sub chassis 15 toward the base chassis 12 is abutted. Is formed. The inclined surface 135a is gradually lowered toward the circumferential direction of the rotating portion 134. The inclined portion 135 is rotated integrally with the rotating portion 134 by rotating the rotating portion 134. Further, the inclined portion 135 has its tip end portion of the skew adjusting shaft 96 pressed against the inclined surface 135a when the sub chassis 15 is urged toward the base chassis 12 by the urging member 98. Therefore, when the rotation unit 134 is rotated by the skew adjustment motor 132 via the gear mechanism 133, the skew adjustment cam 131 moves up and down the subchassis 15 with the skew adjustment shaft 96 sliding relative to the inclined surface 135a. Can be operated. Specifically, in the skew adjusting cam 131, when the rotating portion 134 is rotated in the direction of arrow R in FIG. 6, the skew adjusting shaft 96 is lifted by sliding on the inclined surface 135a, and the sub chassis 15 is moved in the direction of the arrow in FIG. When the rotating portion 134 is tilted in the T direction and rotated in the direction indicated by the arrow R in FIG. 6, the skew adjusting shaft 96 slides down on the inclined surface 135a, and the sub chassis 15 moves in the direction opposite to the arrow in FIG. It can be tilted in the T direction.

In the second skew adjusting mechanism 130 as described above, while the second disk-shaped recording medium 3b is inserted into the disk drive device 1 and content data is being recorded or reproduced by the second optical pickup device 100. Then, skew adjustment of the second optical pickup device 100 is performed.
Specifically, the infrared light emitted from the skew detection unit 108 mounted on the second optical pickup device 100 is reflected by the signal recording surface of the second disk-shaped recording medium 3b, and the reflected light is skewed. It is detected by the detection unit 108. The skew detection unit 108 outputs an output corresponding to the inclination of the signal recording surface of the second disk-shaped recording medium 3b to the differential amplifier circuit, and the signal level corresponding to the inclination of the laser light by performing the differential amplification. A skew error signal that changes is generated. Then, the skew adjustment motor 132 is driven by the servo circuit 163 so that the skew error signal is minimized, and the skew adjustment cam 131 is rotated in the arrow R direction or the counter arrow R direction in FIG. .

  As the skew adjustment cam 131 is rotated, the skew adjustment shaft 96 is moved up and down while sliding on the inclined surface 135. As a result, the sub-chassis 15 on which the skew adjusting shaft 96 protrudes is adjusted with respect to the base chassis 12 and the second optical pickup device 100 of the second optical pickup mechanism 16 disposed on the sub-chassis 15 is adjusted. Skew adjustment is performed.

  Here, as described above, the second optical pickup device 100 records or reproduces content data on the second disc-shaped recording medium 3b on which various content data is recorded in the second format. . Also, among the second disk-shaped recording medium 3b, the physical format such as the track pitch and pit size formed on the signal recording surface of the DVD is narrower than that of the CD, and the signal recording surface is irradiated. The allowable amount of the laser beam with respect to the tilting of the optical axis is severely limited. Furthermore, when recording content data, the optical axis of the light beam emitted from the second optical pickup device 100 is inclined rather than perpendicular to the signal recording surface of the second disc-shaped recording medium 3b. The spots formed on the signal recording surface due to the occurrence of aberration become an ellipse instead of a perfect circle, and accurate data recording cannot be performed. Therefore, the second optical pickup device 100 detects the inclination of the optical axis of the laser light with high accuracy in real time during recording or reproduction of the second disk-shaped recording medium 3b, and the skew adjustment mechanism 130 performs skew. Adjustment is performed with higher accuracy.

  Further, the second skew adjustment mechanism 130 adjusts the inclination of the subchassis 15 to adjust the skew of the second optical pickup device 100 mounted on the subchassis 15. As described above, the second optical pickup device 100 performs skew adjustment in real time during the recording or reproducing operation of the second disc-shaped recording medium 3b. Similarly, when the guide shafts 110 and 111 are directly driven, the bearing members 112 to 115 are worn due to frequent sliding contact with the guide shafts 110 and 111, and it may be difficult to perform stable skew adjustment. is there. Further, in order to suppress damage to the guide shafts 110 and 111 and the bearing members 112 to 115, if these are formed using a member having mechanical strength, the optical pickup mechanism is increased in size and weight. Furthermore, if a skew adjustment unit is incorporated in the pickup base 101 of the second optical pickup device 100 and is assigned a skew adjustment function, the burden on the second optical pickup device 100 increases, and stable skew adjustment is performed. May be difficult.

  On the other hand, in the disk drive device 1 to which the present invention is applied, the sub chassis 15 is rotatably supported on the outer peripheral wall 21 of the base chassis 15 around the rotation support portion 94, and the rotation support portion 94 is used as a fulcrum. In this configuration, the inclination of the chassis 15 is adjusted. Accordingly, even when real-time skew adjustment is performed by the second skew adjustment mechanism 130, the sub chassis 15, the guide shafts 110 and 111, and the bearing members 112 to 115 are damaged by frequently adjusting the inclination of the sub chassis. In addition, stable skew adjustment can be performed without increasing the burden on the second optical pickup device 100.

  As shown in FIG. 7, the recording / reproducing mechanism 11 of the disk drive device 1 having such a configuration is provided with a disk rotation driving unit 13, a first optical pickup mechanism 14, and a sub chassis 15 mounted on a base chassis 12. By attaching the second optical pickup mechanism 16 on the sub chassis 15, the first optical pickup device 50 disposed on the right side of the base chassis 12 and the sub chassis 15 provided on the left side of the base chassis 12 are provided. The second optical pickup device 100 arranged above is supported symmetrically by the guide shafts 60 and 61 and the guide shafts 110 and 111.

  That is, in the first optical pickup device 50, one end side 51a of the pickup base 51 is supported at one point by engaging the engaging piece 54 with the guide shaft 60, and the other end side 51b is inserted into the insertion hole 55 with the guide shaft 61. Is inserted into the engagement piece 54 and the insertion hole 55 at both ends. On the other hand, the second optical pickup device 100 has one point by engaging an engagement piece 104 formed on one end side 101a of the pickup base 101 with the guide shaft 110 so as to be symmetric with the first optical pickup device 100. And the guide shaft 111 is inserted into the insertion hole 105 formed in the other end portion 101 b, so that both ends of the engagement piece 104 and the insertion hole 105 are symmetrical to the first optical pickup device 50. Supported by the three points of the department.

  As a result, the first and second optical pickup devices 50 and 100 maintain the weight balance of the recording / reproducing mechanism 11 around the disk rotation driving unit 13 disposed substantially at the center of the base chassis 12. Therefore, the disk drive device 1 can perform stable recording or reproduction with respect to the disk-shaped recording medium 3 by balancing the weight of the recording / reproducing unit 4.

  Further, as shown in FIG. 7, the damper chassis 31 is provided in the base chassis 12 of the recording / reproducing mechanism 11 in the vicinity of both corners of the right side surface 12 c and the left side surface 12 d and in the front and rear end portions of the mounting portion 24. To 36, and outer peripheral side dampers 141 to 144 such as rubber bushes and inner peripheral side dampers 145 and 146 are attached.

  Among these, the outer periphery side dampers 141 and 142 and the inner periphery side dampers 145 and 146 are disposed so as to surround the moving region of the first optical pickup device 50. That is, as shown in FIGS. 7 and 8, the first optical pickup device 50 moves between the inner periphery side and the outer periphery side of the disk-shaped recording medium 3 placed on the disk rotation drive unit 13. However, the first optical pickup device 50 is surrounded by the outer dampers 141 and 142 and the inner dampers 145 and 146 at any position in the moving region. In addition, when the first optical pickup device 50 is moved to the inner peripheral side that approaches the spindle motor 42 that serves as the vibration source, the first optical pickup device 50, along with the spindle motor 42 that serves as the vibration source, has outer dampers 141, 142 and the inner periphery side dampers 145 and 146, the vibration by the spindle motor 42 can be more effectively prevented. In addition, when the first optical pickup device 50 is moved to the outer peripheral side away from the spindle motor 42 serving as a vibration source, the first optical pickup device 50 includes the pair of outer peripheral side dampers 141 and 142 and the inner peripheral side damper. Since it is surrounded by at least three dampers 145 or 146, the influence of vibration by the spindle motor 42 can be prevented.

  Similarly, the outer periphery side dampers 143 and 144 and the inner periphery side dampers 145 and 146 are disposed so as to surround the moving region of the second optical pickup device 100. That is, as shown in FIGS. 7 and 8, the second optical pickup device 100 moves between the inner periphery side and the outer periphery side of the disk-shaped recording medium 3 placed on the disk rotation drive unit 13. However, the second optical pickup device 100 is surrounded by the outer dampers 143 and 144 and the inner dampers 145 and 146 at any position in the moving region. In addition, when the second optical pickup device 100 is moved to the inner peripheral side that approaches the spindle motor 42 that serves as the vibration source, the second optical pickup device 100 moves along with the outer periphery side dampers 143 and 143 together with the spindle motor 42 that serves as the vibration source. 144 and the inner periphery side dampers 145 and 146, vibrations by the spindle motor 42 can be more effectively prevented. In addition, when the second optical pickup device 100 is moved to the outer peripheral side away from the spindle motor 42 serving as a vibration source, the second optical pickup device 100 includes a pair of outer peripheral side dampers 143 and 144 and an inner peripheral side damper. Since it is surrounded by at least three dampers 145 or 146, the influence of vibration by the spindle motor 42 can be prevented.

  As described above, the first and second optical pickup devices 50 and 100 are provided on the inner peripheral side with the pair of outer dampers 141 and 142 or 143 and 144 provided on the outer peripheral side of the disc-shaped recording medium 3, respectively. The moving region is surrounded by the pair of inner circumferential dampers 145 and 146. Therefore, even if the disk-shaped recording medium 3 is moved to any position between the inner circumference side and the outer circumference side, the influence of the vibration of the spindle motor 42 serving as a vibration source on the recording or reproduction of the content data is prevented. Can do.

  In addition, when the first and second optical pickup devices 50 and 100 are moved to the inner periphery side, the four dampers of the pair of inner periphery side dampers 145 and 146 and the outer periphery side dampers 141 and 142 or 143 and 144 are Since it is enclosed with the spindle motor 42 which becomes a vibration source, vibration can be effectively prevented.

  Further, when the first and second optical pickup devices 50 and 100 are moved to the inner peripheral side, at least three of the pair of outer peripheral side dampers 141, 142 or 143 and 144 and the inner peripheral side dampers 145 or 146 are used. Since it is surrounded, the vibration by the spindle motor 42 can be surely prevented.

  Next, the operation of the disk drive device 1 having the above configuration will be described. Before the disc-shaped recording medium 3 is inserted into the device main body 2 of the disc drive device 1, the first and second optical pickup devices 50 and 100 of the recording / reproducing mechanism 11 are both close to the disc rotation drive unit 13. It is moved to the inner periphery side and is waiting for the insertion of the disc-shaped recording medium 3.

  As shown in FIG. 1, when the disc-shaped recording medium 3 is inserted from the disc insertion opening 7 formed on the front surface 2a of the apparatus main body 2, the back surface 2b side of the apparatus main body 2 is omitted by a disk transport mechanism that omits details. And loaded onto the disk table 41 of the recording / reproducing unit 4.

  Here, in the disc drive device 1 to which the present invention is applied, the recording / reproducing unit 4 is arranged with the longitudinal direction parallel to the front surface 2 a of the device body 2, and the disc-shaped recording inserted through the disc insertion slot 7. The medium 3 is conveyed in the direction of the arrow F in FIG. That is, the disc-shaped recording medium 3 is conveyed in the front-rear direction perpendicular to the longitudinal direction of the base chassis 12, which is the moving direction of the first and second optical pickup devices 50, 100. Therefore, compared to a disk drive device that transports the disk-shaped recording medium in the longitudinal direction of the base chassis, which is the moving direction of the optical pickup device, the disk drive device 1 to which the present invention is applied has the disk-shaped recording medium 3 as a disk. The distance to the table 41 is shortened, and more rapid loading and unloading can be performed. Further, since the transport distance of the disc-shaped recording medium 3 is shortened, the structure of the transport mechanism can be reduced in size.

  When the disc-shaped recording medium 3 is conveyed to the disc table 41 by the conveying mechanism, the type of the disc-shaped recording medium 3 is then detected. The disk drive device 1 records or reproduces content data in a format corresponding to the detected disk-shaped recording medium 3.

  The first optical pickup device 50 is used to detect the type of the disk-shaped recording medium 3. When the disk-shaped recording medium 3 is rotationally driven by the disk rotation driving unit 13, the first optical pickup device 50 emits laser light from the light emitting element and irradiates the signal recording surface of the disk-shaped recording medium 3 to detect light. The reflected light is received by the instrument. The laser beam detected by the photodetector is output to the identification data decoder 151 via the RF circuit 150, and the identification data recorded at a predetermined address of the disc-shaped recording medium 3 is detected (see FIG. 9). Based on the detected identification data, the system controller 152 determines the type of the loaded disc-shaped recording medium 3.

  Next, the system controller 152 selects the first or second optical pickup device 50 or 100 according to the type of the disk-shaped recording medium 3. Specifically, when the first disc-shaped recording medium 3a in which the content data is recorded in the first format is loaded, the first optical pickup device 50 is selected and the content data is recorded in the second format. When the second disc-shaped recording medium 3b is loaded, the second optical pickup device 100 is selected. Further, the system controller 152 selects the first to fourth decoders 153 to 156 for decoding the recorded content data in accordance with the detected type of the disc-shaped recording medium 3. For example, when the first disc-shaped recording medium 3a recorded in the first format is detected, the first or second decoders 153 and 154 are selected. One of the first or second decoders 153 and 154 is selected according to the difference between the old and new playback formats. The system controller 152 selects the third or fourth decoder when the second disc-shaped recording medium 3b recorded in the second format is detected. The third or fourth decoder has a data format such as a physical format such as a track pitch and a pit size of the disc-shaped recording medium 3 and a modulation method such as a CD recording / reproducing decoder and a DVD recording / reproducing decoder. Either one is selected according to the difference. The decoder is appropriately increased or decreased according to the type of recording or reproduction format of the disc-shaped recording medium 3.

  Thus, in the disk drive device 1 to which the present invention is applied, the type of the disk-shaped recording medium 3 mounted on the disk table 41 is detected using the first optical pickup device 50. As described above, the first optical pickup device 50 is used exclusively for data reproduction of the first disc-shaped recording medium 3a on which the content data is recorded in the first format, and the content data is the second data. The frequency of use is lower than that of the second optical pickup device 100 used for recording or reproduction with respect to the second disc-shaped recording medium 3b recorded in the format. Therefore, by using the first optical pickup device 50 for detecting the type of the disc-shaped recording medium 3 mounted on the disc table 41, the burden on the second optical pickup device 100 that is frequently used is reduced and the life is extended. Can be achieved.

  Further, the disk drive device 1 to which the present invention is applied may detect the type of the disk-shaped recording medium 3 mounted using the second optical pickup device 100. As described above, the second optical pickup device 100 is used for recording or reproduction with respect to the second disc-shaped recording medium 3b on which the content data is recorded in the second format, and the track pitch or pit. In order to irradiate a light beam perpendicularly to a signal recording surface whose physical format is narrowed, etc., the optical axis of the laser light irradiated to the signal recording surface is detected by performing skew detection in real time and performing skew adjustment. Is corrected with high accuracy.

  Therefore, by using the second optical pickup device 100 for the type detection of the disk-shaped recording medium 3 mounted on the disk table 41, highly accurate disk detection can be performed and type detection errors can be prevented. Can do.

  When the type of the disc-shaped recording medium 3 is detected, a pickup corresponding to the type is selected, and a decoder corresponding to the detected disc type is selected, the disc-shaped recording medium 3 is then loaded into the disc-shaped recording medium 3 according to a user operation. On the other hand, content data is recorded or reproduced.

  When the first disc-shaped recording medium 3a in which the content data is recorded in the first format is loaded, the first optical pickup mechanism 14 is connected to the lead screw 71 of the pickup moving mechanism 70 from the system controller 152. When rotated by the screw motor 72 driven in response to the control signal, the engaging member 56 that engages with the lead screw 71 is moved along the direction in which the thread groove of the lead screw 71 is formed. The pickup base 51 of the optical pickup device 50 is moved between the inner and outer peripheries of the first disc-shaped recording medium 3a in the extending direction of the guide shafts 60 and 61.

  When the second disc-shaped recording medium 3b in which the content data is recorded in the second format is loaded, the second optical pickup mechanism 16 includes the gear mechanism 121 of the pickup moving mechanism 120 and the system controller 152. When the rack 106 is rotated by the feed motor 122 driven in response to the control signal from the gear mechanism 121, the rack member 106 engaged with the gear mechanism 121 is moved according to the rotation of the gear mechanism 121. The second optical pickup device 100 connected to the rack member 106 is moved integrally with the rack member 106, whereby the pickup base 101 is in the extending direction of the guide shafts 110 and 111. It is moved between the inner and outer circumferences of the disc-shaped recording medium 3b.

  The first or second optical pickup device 50, 100 selected according to the type of the disc-shaped recording medium 3 is configured so that the laser light having a predetermined wavelength emitted from the light emitting element passes through the spectroscope and the objective lens. 52, 102. The laser light is irradiated onto the signal recording surface of the disc-shaped recording medium 3 by the objective lenses 52 and 102, and is focused on the recording track on which the pits are recorded. The laser light is reflected by the reflective layer of the disk-shaped recording medium 3 in a state where the light intensity is modulated based on the pit state of the recording track, and is incident on the objective lenses 52 and 102 again. The reflected light is split by the spectroscope from the objective lenses 52 and 102 and is incident on the photodetector. In the disk drive device 1, the reproduction output corresponding to the pit state is sent from the photodetector to the first to fourth decoders 153 to 156 selected in advance via the RF circuit 150 or 158, and decoding processing such as modulation is performed. After that, the content data is reproduced by the monitor 159 and the speaker 160 connected to the apparatus main body 2.

  The second optical pickup device 100 is supplied with a recording data string output from the hard disk drive 5 and converted into a predetermined format via the recording processing unit 161 when recording content data on the disc-shaped recording medium 3. Then, writing is performed on the disk-shaped recording medium 3. The recording processing unit 161 includes an encoding circuit and a modulation circuit. The input recording data string is added with an error correction code by an encoding circuit, and subjected to modulation processing such as 8-14 modulation or 8-16 modulation by a modulation circuit.

  When the recording or reproducing process is performed by the first or second optical pickup device 50, 100, the servo circuits 162, 163 control the spindle motor 42 so that the disk-shaped recording medium 3 has a target rotational speed. To drive.

  The servo circuits 162 and 163 drive the biaxial actuator based on the focus error signal (FE signal) output from the RF amplifiers 150 and 158 so that the focal position of the light beam is close to the disc-shaped recording medium 3. Focusing servo control to move in the direction of separation is performed. Specifically, the servo circuits 162 and 163 form a servo loop in which negative feedback is formed so that the FE signal becomes 0, and drives the biaxial actuator. The servo circuits 162 and 163 drive the biaxial actuator based on the tracking error signal (TE signal) output from the RF amplifiers 150 and 158 to set the light beam irradiation position to the recording track of the disk-shaped recording medium 3. Tracking servo control to move in the orthogonal direction is performed. Specifically, the servo circuits 162 and 163 form a servo loop in which negative feedback is formed so that the TE signal becomes 0, and drives the biaxial actuator.

  Here, since the first optical pickup device 50 is skew-adjusted in advance at the time of manufacture and shipment, it does not hinder the reading of the content data recorded on the first disk-shaped recording medium 3a. Playback can be performed. On the other hand, the second optical pickup device 100 needs to record or reproduce the content data while always correcting the optical axis tilt with respect to the signal recording surface of the second disc-shaped recording medium 3b. Performs skew adjustment in real time.

  Specifically, in the second optical pickup device 100, the infrared light emitted from the skew detection unit 108 is reflected on the signal recording surface of the second disk-shaped recording medium 3b, and the reflected infrared light is skewed. The detection unit 108 receives light. The skew detector 108 differentially amplifies the received infrared light to generate a skew error signal and output it to the servo circuit 163. The servo circuit 163 drives the skew adjustment motor 132 of the second skew adjustment mechanism 130 so that the skew error signal is minimized.

  As described above, the disk drive device 1 to which the present invention is applied includes the first and second optical pickup devices 50 and 100 and the first and second optical pickup devices 50 and 100 that perform skew adjustment. The second skew adjustment mechanism 80, 130 is provided, the skew of the first optical pickup device 50 is roughly adjusted at the time of manufacture and shipment of the disk drive device 1, and the content data is recorded in the second format. During the reproduction or recording of the second disc-shaped recording medium 3, the second optical pickup device 100 is precisely adjusted in skew in real time. Therefore, the two pickup mechanisms and the skew adjustment mechanism can be used properly according to the type of the loaded disc-shaped recording medium 3, and content data can be recorded or reproduced at an appropriate skew angle.

  Further, in the disk drive device 1 to which the present invention is applied, when one optical pickup device is moved in the inner and outer peripheral directions of the disk-shaped recording medium 3, the other optical pickup device is also moved in synchronization with each other. The center of gravity of the base chassis 12 is controlled so that it always matches the spindle motor 42.

  Specifically, the disk drive device 1 detects the amount of movement of the first and second optical pickup devices 50 and 100 by the system controller 152 and determines the other optical pickup device according to the amount of movement of one optical pickup device. The pickup moving mechanisms 70 and 120 are controlled so as to move (see FIG. 9).

  This system controller 152 is a second optical pickup for balancing the base chassis 12 with respect to the weight of the first and second optical pickup devices 50 and 100 and the movement of the first optical pickup device 50 in advance. A table in which the amount of movement of the device 100 and the amount of movement of the first optical pickup device 50 for counter-balancing the base chassis 12 with respect to the movement of the second optical pickup device 100 is recorded is recorded. A memory 164 is connected. Then, the system controller 152 causes the pickup moving mechanism 70 or 120 to select one of the first or second optical pickup devices 50 and 100 selected according to the type of the disk-shaped recording medium 3 mounted on the disk table 41. When the recording medium 3 is moved in the inner / outer circumferential direction, the amount of movement is detected, and the other optical pickup device is moved in the inner / outer circumferential direction of the disk-shaped recording medium 3 based on the table recorded in the memory 164. The motor of the pickup moving mechanism 70 or 120 is controlled.

  As described above, one of the first and second optical pickup devices 50 and 100 arranged to face the base chassis 12 is moved in the inner and outer peripheral directions of the disc-shaped recording medium 3. Since the other optical pickup device is also moved in the inner and outer peripheral directions of the disk-shaped recording medium 3, the other optical pickup device is moved against the change in the weight balance of the base chassis 12 accompanying the movement of one optical pickup device. The movement of the optical pickup device is counterbalanced. Therefore, the center of gravity of the base chassis 12 serves as a vibration source regardless of the position where the first or second optical pickup device 50, 100 is moved between the inner and outer peripheries of the disk-shaped recording medium 3. Therefore, the disk-shaped recording medium 3 can be kept in a stable rotation without being deviated. In addition, since the rotation of the disc-shaped recording medium 3 is stabilized, the first or second optical pickup device 50 or 100 can reliably record or reproduce the content data.

  Further, as shown in FIGS. 7 and 8, the first optical pickup device 50 is supported at one point by the one end side 51a of the pickup base 51 engaging the engaging piece 54 with the guide shaft 60, and the other end. The side 51 b is supported at three points of the engaging piece 54 and both ends of the insertion hole 55 by inserting the guide shaft 61 through the insertion hole 55. On the other hand, the second optical pickup device 100 has one point by engaging an engagement piece 104 formed on one end side 101a of the pickup base 101 with the guide shaft 110 so as to be symmetric with the first optical pickup device 100. The guide shaft 111 is inserted into the insertion hole 105 formed in the other end portion 101b so that it is engaged with the first optical pickup device 50 via the disk rotation drive unit 13. It is supported at three points on both ends of the piece 104 and the insertion hole 105.

  Further, the pickup moving mechanism 70 for moving the first optical pickup device 50 is disposed on the rear surface 12b side of the base chassis 12 adjacent to the guide shaft 61 side. On the other hand, the pickup moving mechanism 120 that moves the second optical pickup device 100 is disposed adjacent to the guide shaft 111 and on the front surface 12a side of the base chassis 12, and is symmetrical to the pickup device 70 via the disk rotation drive unit 13. Is located.

  As a result, the first and second optical pickup devices 50 and 100 maintain the weight balance of the recording / reproducing mechanism 11 around the disk rotation driving unit 13 disposed substantially at the center of the base chassis 12. Therefore, the disk drive device 1 can perform stable recording or reproduction with respect to the disk-shaped recording medium 3 by balancing the weight of the recording / reproducing unit 4.

  Further, in the disk drive device 1 to which the present invention is applied, content data is recorded by the second optical pickup device 100, and at the same time, the second optical pickup device 100 is disc-recorded by the first optical pickup 50. It is confirmed (verified) whether or not the content data has been normally recorded on the medium 3.

  Since the disk drive device 1 includes the writable second optical pickup device 100 and the read-only first optical pickup device 50, the writing by the second optical pickup device 100 and the first optical pickup. Since the reading by the device 50 can be performed simultaneously, it is possible to confirm whether or not the content data has been normally recorded in real time. Accordingly, when a write error due to a disturbance such as an impact occurs, the disk drive device 1 can temporarily stop the write operation, quickly detect the interrupted address, and then start writing again.

  Specifically, content data is written by the second optical pickup 100, while a light beam is irradiated by the first optical pickup device 50, and reflected light from the signal recording surface is detected by a photodetector. The detection light detected by the photodetector is output to the system controller 152 via the RF circuit 150. Data to be written to the disk-shaped recording medium 3 is output from the recording processing unit 161 to the system controller 152. The system controller 152 compares the recording data output from the recording processing unit 161 for each address with the recording data read by the first optical pickup device 50, and detects a writing error. When a writing error is found, the second moving mechanism 120 is controlled by the system controller 152, the address where the error has occurred is detected, and writing by the second optical pickup device 100 is performed.

  Here, in a disk drive device including one optical pickup device, when a writing error occurs on the signal recording surface of the disk-shaped recording medium 3, after all the content data on the disk-shaped recording medium 3 has been written. It takes time to confirm whether or not this writing has been performed normally, and prompt rewriting cannot be performed. However, like the disk drive device 1 to which the present invention is applied, the first and second optical pickup devices 50 and 100 are provided, and writing by the second optical pickup device 100 and verification by the first optical pickup 50 are performed. By simultaneously performing the above, it is possible to quickly detect a writing error and perform writing again.

  Therefore, according to the disk drive device 1, it is possible to perform rapid writing and writing in the disk-shaped recording medium 3 capable of continuous writing according to time series, such as CD-R and DVD-R.

  Further, the first and second optical pickup devices 50 and 100 are arranged between the inner peripheral side and the outer peripheral side of the disc-shaped recording medium 3 in the data recording or reproducing process, as shown in FIGS. Moved. At this time, the base chassis 12 has outer side dampers 141 to 144 and inner side dampers 145 and 146 at both ends of the mounting part 24 formed in the vicinity of each corner part of the base chassis 12 and in a substantially middle part in the longitudinal direction. Since it is attached and sandwiched between the upper and lower frames 18 and 19 of the base frame 10 via these dampers 141 to 146, vibrations by the spindle motor 42 of the base chassis 12 are effectively prevented.

  That is, when the first and second optical pickup devices 50 and 100 are moved toward the inner peripheral side that approaches the spindle motor 42 that serves as the vibration source, the outer dampers 141, 142, or 143 together with the spindle motor 42 that serves as the vibration source. 144 and the inner periphery side dampers 145 and 146, vibration due to the spindle motor 42 can be more effectively prevented. In addition, when the first and second optical pickup devices 50 and 100 are moved to the outer peripheral side away from the spindle motor 42 serving as the vibration source, the first and second optical pickup devices 50 and 100 are also paired with the outer periphery. Since it is surrounded by at least three dampers of the side dampers 141, 142 or 143, 144 and the inner peripheral damper 145 or 146, the influence of vibration by the spindle motor 42 can be prevented.

  The disk drive device 1 to which the present invention is applied has been described in detail above. However, the present invention is not limited to the above-described configuration. For example, the first optical pickup device is a recording and / or reproducing pickup device. You may comprise as. In addition to the configuration in which the disk-shaped recording medium 3 is directly inserted into the apparatus main body 2, a disk tray formed so as to be movable in and out of the apparatus main body 2 is provided, and the disk-shaped recording medium 3 is placed on the disk tray. You may make it mount and convey in the apparatus main body 2. FIG.

1 is a perspective view showing a disk drive device to which the present invention is applied. It is an external perspective view of a recording / reproducing unit. It is a perspective view which shows the recording / reproducing mechanism of a recording / reproducing unit. It is a disassembled perspective view of a recording / reproducing mechanism. It is a disassembled perspective view which shows a 1st skew adjustment mechanism. It is a disassembled perspective view which shows the 2nd skew adjustment mechanism. It is a top view which shows the recording / reproducing mechanism in which both the 1st and 2nd optical pick-up apparatuses were moved to the inner peripheral side. It is a top view which shows the recording / reproducing mechanism in which both the 1st and 2nd optical pick-up apparatuses were moved to the outer peripheral side. It is a block diagram which shows a disk drive apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc drive apparatus, 2 Apparatus main body, 3 Disc-shaped recording medium, 4 Recording / reproducing unit, 5 Hard disk drive, 7 Disc insertion slot, 10 Base frame, 11 Recording / reproducing mechanism, 12 Base chassis 13 Disc rotation drive part, 14 1st Optical pickup mechanism, 15 sub-chassis, 16 second optical pickup mechanism, 17 circuit board, 18 upper frame, 19 lower frame, 20 mounting surface, 21 outer peripheral wall, 22 first opening, 23 second opening , 24 Mounting section, 31-36 Damper opening, 41 Disc table, 42 Spindle motor, 50 First optical pickup device, 51 Pickup base, 53 Cover member, 54 Engagement piece, 55 Insertion hole, 56 Engagement Member, 60, 61, 110, 111 guide shaft, 70, 12 Pickup moving mechanism, 71 lead screw, 72 screw motor, 80 first skew adjusting mechanism, 81 lifting cam, 82 control plate, 83 rotating portion, 84 shaft portion, 85 inclined surface, 86 locking recess, 87 regulating protrusion, 88 opening, 89 pressing piece, 90 main surface, 91 pickup opening, 96 skew adjusting shaft, 100 second optical pickup device, 101 pickup base, 104 engagement piece, 105 insertion hole, 106 rack member, 121 gear mechanism , 122 Feed motor, 130 Second skew adjusting mechanism, 131 Skew adjusting cam, 132 Skew adjusting motor, 133 Gear mechanism, 134 Rotating part, 135 Inclining part, 136 Engaging part, 141-144 Outer side damper, 145,146 Inner side damper

Claims (4)

A base frame,
A substantially rectangular base chassis mounted on the base frame;
A disk rotation drive unit that is disposed substantially in the longitudinal direction of the base chassis and has a disk table that holds a disk-shaped recording medium, and a spindle motor that is connected to the disk table and rotates the disk table;
A first optical pickup device for recording and / or reproducing an information signal on the disk-shaped recording medium disposed on one end side in the longitudinal direction of the base chassis and mounted on the disk table; A pair of first guide shafts extending from substantially the middle in the longitudinal direction to one end side and guiding the first optical pickup device over the inner and outer circumferences of the disc-shaped recording medium, and the pair of first guides A first optical pickup mechanism having a first pickup moving mechanism for moving the first optical pickup device along a guide axis;
A second optical pickup device for recording and / or reproducing information signals to and from the disk-shaped recording medium placed opposite to the first optical pickup mechanism and placed on the disk table; and the base chassis A pair of second guide shafts extending from substantially the middle in the longitudinal direction to the other end side for guiding the second optical pickup device over the inner and outer circumferences of the disc-shaped recording medium, and the pair of first guide shafts. A second optical pickup mechanism having a second pickup moving mechanism for moving the second optical pickup device along two guide axes,
The base chassis is provided with a pair of first damper members on each outer peripheral side of the first and second guide shafts for guiding the movement of the disc-shaped recording medium in the inner and outer peripheral directions, and the first chassis And a pair of second damper members provided on the inner peripheral side of the second guide shaft. The first optical pickup device includes the pair of first damper members provided on the outer peripheral side of the first guide shaft and at least one of the first damper members provided on the inner peripheral side together with the disk rotation driving unit. The movement area is surrounded by the two damper members,
The second optical pickup device includes the disk rotation driving unit and the pair of second damper members provided on the outer peripheral side of the second guide shaft and at least one of the second damper members provided on the inner peripheral side. 2. The disk drive device according to claim 1, wherein the moving region is surrounded by two damper members.   2. The disk drive device according to claim 1, wherein the second damper member is provided in the vicinity of the disk rotation driving portion provided substantially in the middle of the base frame in the longitudinal direction. On the base chassis, a sub-chassis in which the second optical pickup mechanism is disposed on the opposite side of the first optical pickup mechanism via the disk rotation driving unit is provided.
2. The disk drive apparatus according to claim 1, wherein the sub chassis is tilt-adjusted by the skew adjusting means, and skew adjustment of the second optical pickup apparatus is performed.

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