JP2005310318A - Recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device which can reduce the entire thickness without generating a rotation moment with a pivotal support part as a fulcrum, in a sub-chassis. <P>SOLUTION: The recording device is provided with a main chassis 2 on which an electric motor 1 for rotating a recording medium is mounted, a sub-chassis 4 which is supported by the main chassis 2 so that the tilt can be adjusted by pivots 3 and 3, and an optical head 6 which is supported by the sub-chassis 4 and writes and/or reads data on/from the recording medium. The pivots 3 and 3 are extended from both side parts of the sub-chassis 4 in parallel with a tilt center line, and the main chassis 2 is provided with flat springs 10 and 10 which are brought into contact with peripheral surfaces of the pivots 3 and 3 to elastically press the pivots 3 and 3 in a radial direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording device such as a compact disc (CD), a digital versatile disc (DVD), and a mini disc (MD).

  A recording apparatus such as a DVD includes an electric motor having a disk mounting portion at the end of a motor shaft, a chassis that supports the electric motor, an optical head that writes and / or reads data on a disk as a recording medium, A traverse mechanism for traversing the optical head in the radial direction of the disk, and configured to rotate the disk by driving the electric motor and move the optical head in the radial direction of the disk relative to the disk (For example, Patent Document 1).

  In the recording apparatus configured as described above, a concentric recording formed on the disk surface is formed by passing a light beam modulated corresponding to data to be recorded, through an objective lens of an optical head, and condensing the light beam on a light spot. Recording is performed by projecting onto a track and forming a recording mark, which is a reverse magnetic domain, on the recording track, and collecting the reflected light from the disk surface with an objective lens and converting it to data Thus, since the reproduction is performed, the inclination of the optical head with respect to the recording medium can be adjusted, and the focus position of the light spot can be changed in accordance with the track position of the optical disk.

  The tilt adjustment of the optical head is performed by a tilt adjustment mechanism provided in the optical head, and the main chassis that supports the electric motor, and the sub chassis in which one surface faces the main chassis and the optical head is supported. Is known that is supported by a pivot so that the tilt can be adjusted, and the tilt amount of the sub chassis is adjusted.

In a recording apparatus having a secondary chassis, it is necessary to eliminate the backlash of the secondary chassis with respect to the main chassis. As a means for eliminating this backlash, a tension spring is provided for pulling a plurality of positions displaced from the pivotal support portion of the secondary chassis toward the main chassis side, or the other surface of the secondary chassis near the pivotal portion (the side opposite to the primary chassis) Is provided with a leaf spring that presses against the main chassis.
JP-A-4-61059

  However, in the recording apparatus in which the tension spring is used as a means for eliminating the backlash of the sub chassis as described above, a rotational moment about the pivot is generated in the sub chassis, and the tilt adjustment position of the sub chassis is In a recording apparatus using a leaf spring that elastically presses the other surface of the sub-chassis, the main spring and the sub-chassis are configured so that the leaf spring is overlaid on the sub-chassis. There has been a problem that the thickness in the direction in which the chassis faces, and thus the thickness of the entire recording apparatus, becomes thicker than the type using the tension spring.

  The present invention has been made in view of such circumstances, and a main object thereof is to have a structure in which a pivot that pivotally supports the sub-chassis extends from both sides of the sub-chassis in parallel with the tilt center line. By providing the main chassis with a leaf spring that contacts the surface and elastically presses the pivot in the radial direction, it is possible to prevent a rotation moment about the pivot from being generated in the sub chassis, and to reduce the thickness of the entire recording apparatus. An object of the present invention is to provide a recording apparatus capable of reducing the thickness.

  Another object of the present invention is to provide a recording apparatus that can reduce the position adjusting spring in the tilt center line direction of the sub chassis by configuring the leaf spring to have a pressure-reducing portion that elastically presses the sub chassis in the longitudinal direction of the tilt center line. It is to provide.

  Another object of the present invention is to provide a recording apparatus capable of improving the assembly workability by forming a leaf spring having one end attached to the main chassis and molding the elastic part integrally with the one end. .

  Another object of the present invention is to provide a structure in which the sub-chassis has a low pressure-receiving portion near one side of the sub-chassis in the vicinity of the pivot position, and a plate spring that presses the pressure-receiving portion toward the main chassis. Accordingly, it is possible to provide a recording apparatus capable of preventing a rotation moment about the pivot from being generated in the sub-chassis and reducing the thickness of the entire recording apparatus.

  The recording apparatus according to the present invention includes a main chassis on which an electric motor for rotating a recording medium is mounted, a sub chassis supported on the main chassis so as to be tilt-adjustable by a pivot, and supported by the sub chassis. In the recording apparatus having an optical head for writing and / or reading data, the pivot extends from both sides of the sub-chassis in parallel with the tilt center line, and the main chassis extends from the pivot. A leaf spring that contacts the peripheral surface and elastically presses the pivot in the radial direction is provided.

  In this invention, the leaf spring is in contact with the peripheral surface of the pivot that pivotally supports the sub chassis so that the tilt adjustment is possible, and the pivot is elastically pressed in the radial direction, so that the rotational moment about the pivot is applied to the sub chassis. Occurrence can be prevented, and the tilt adjustment position of the sub chassis can be easily stabilized. In addition, since the leaf spring that contacts the peripheral surface of the pivot can be disposed at a position lower than the other surface of the sub chassis, the thickness in the direction in which the main chassis and the sub chassis face each other, and thus the thickness of the entire recording apparatus can be reduced. Can be thinned.

  The recording apparatus according to the present invention is characterized in that the leaf spring includes a pressing portion that presses the sub chassis in a longitudinal direction of a tilt center line.

  According to the present invention, the leaf spring for adjusting the tilt of the sub chassis has a pressure-pressing portion that presses the sub chassis in the longitudinal direction of the tilt center line, so the position adjusting spring in the tilt center line direction of the sub chassis is reduced. it can.

  The recording apparatus according to the present invention is characterized in that one end of the leaf spring is attached to the main chassis, and the elastic portion is formed integrally with the one end.

  In the present invention, the spring for repressing the sub-chassis in two directions can be integrally formed, and the assembling workability can be improved.

  Further, a recording apparatus according to the present invention includes a main chassis on which an electric motor for rotating a recording medium is mounted, a sub-chassis whose one surface is opposed to the main chassis, and is supported so as to be tilt-adjustable by a pivoting means, In a recording apparatus comprising an optical head supported by the subchassis and for writing and / or reading data on the recording medium, the subchassis is closer to the pivot position than the other surface of the subchassis. The main chassis includes a leaf spring that elastically presses the pressed portion toward the main chassis.

  In this invention, the sub-chassis has a lower elastic pressure portion near the pivotal position and on the one surface side facing the main chassis than the other surface, and the elastic force is compressed by the leaf spring. Therefore, it is possible to prevent the rotation moment about the pivot portion from being generated in the secondary chassis, and to easily stabilize the tilt adjustment position of the secondary chassis. In addition, since the leaf spring that presses against the pressed portion can be disposed at a position lower than the other surface of the sub-chassis, the thickness in the direction in which the main chassis and the sub-chassis face each other, and thus the thickness of the entire recording apparatus, is reduced. can do.

  According to the present invention, it is possible to prevent a rotational moment about the pivot from being generated in the sub-chassis, and to reduce the thickness of the entire recording apparatus.

  Further, according to the present invention, it is possible to reduce the position adjusting spring in the tilt center line direction of the sub chassis.

  In addition, according to the present invention, the spring that elastically presses the sub chassis in two directions can be integrally formed, and the assembling workability can be improved.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. 1 is a plan view showing a configuration of a recording apparatus according to the present invention, FIG. 2 is a front view with a part cut away, FIG. 3 is a longitudinal front view in which the main part is enlarged, and FIG. 4 is a plan view in which the main part is enlarged, FIG. 5 is a perspective view of the leaf spring.

  This recording apparatus is supported by a frame-shaped main chassis 2 on which an electric motor 1 for rotating a disk A as a recording medium is mounted, and two pivots 3 and 3 on both sides of the main chassis 2 so as to be adjustable in tilt. Accommodates a frame-shaped sub-chassis 4, an optical head 6 that is supported by the sub-chassis 4 via two guide shafts 5, 5 for writing and / or reading data on the disk A, and the main chassis 2. The housing 7 is provided as a support to be supported.

  The main chassis 2 has a substantially rectangular frame shape, and the square portion is supported in the housing 7 via the buffer body 8. Trapezoidal convex portions 2b and 2b are provided in the vicinity of the center in the longitudinal direction of both side portions 2a and 2a of the main chassis 2, and the bearing body 9 having a substantially V-shaped bearing groove 9a in each of the trapezoidal convex portions 2b and 2b. , 9 and leaf springs 10, 10 for preventing rattling of the subchassis 4 pivotally supported by the bearing bodies 9, 9 are attached by small screws 20. Further, a holding piece 2c is provided on the trapezoidal convex portion 2b of one side 2a so as to face the end surface of one pivot 3 at a position separated from the bearing body 9 in the axial length direction of the pivot 3. A screw hole 2d is formed in the holding piece 2c, and an adjustment screw 21 that abuts against an end surface of one pivot 3 is screwed into the screw hole 2d. An electric motor 1 is attached to one side 2e between both side portions 2a, 2a, and a small electric motor for tilting (not shown) and the side on the side opposite to the electric motor 1 are provided. A cam (not shown) that is rotated by a small electric motor is provided, and the sub-chassis 4 is tilt-adjusted by the rotation of the cam.

  The sub-chassis 4 has a substantially rectangular frame shape facing the main chassis 2 at a distance from each other, and the electric motor 1 and the optical head 6 are disposed inside the sub-chassis 4. The pivot shafts 3 and 3 are projected in the vicinity of the longitudinal center of both side portions 4a and 4a of the sub chassis 4, and the pivot shafts 3 and 3 are engaged with the bearing grooves 9a and 9a of the bearing bodies 9 and 9, respectively. The leaf springs 10 and 10 press the pivots 3 and 3 against the bearing grooves 9a and 9a. The pivots 3 and 3 are attached to one surface of the sub chassis 4 facing the main chassis 2.

  The leaf springs 10 and 10 are strips via strip plate portions 10a and 10a that elastically press the pivots 3 and 3 in the radial direction, and two bent portions that are bent in the plate thickness direction at one end side of the strip plate portions 10a and 10a. It consists of a spring steel plate which has the fixed board part 10b, 10b connected in parallel with the part 10a, 10a. One leaf spring 10 is integrally formed with a band plate-like elastic portion 10c for elastically pressing one pivot 3 in the axial direction. This elastic pressure part 10c is bent orthogonally to the fixed plate part 10b from a position separated from the band plate part 10a of the fixed plate part 10b, and extends in the same direction as the band plate part 10a. The plate springs 10 and 10 configured in this way are fixed to the trapezoidal convex portions 2b and 2b by the small screws 20 inserted through the through holes 10d and 10d formed in the fixing plate portions 10b and 10b. The band plate portions 10a and 10a are in contact with the peripheral surfaces of the pivot shafts 3 and 3, and the pivot shafts 3 and 3 are elastically pressed toward the bearing bodies 9 and 9, and the elastic pressure portion 10c of one leaf spring 10 is One pivot 3 is pressed in the axial length direction in contact with the end edge of the pivot 3.

  The optical head 6 passes a light beam modulated in accordance with the data to be written through an objective lens, condenses it on a small-sized light spot, projects it onto a track formed on the surface of the disk A, and inverts it onto the track. Writing is performed by forming a recording mark that is a magnetic domain, and the reflected light from the surface of the disk A is collected by an objective lens and is read out by converting it into data. It is mounted on the mechanism 22.

  The traverse mechanism 22 is mounted on the sub-chassis 4 via the two guide shafts 5 and 5 so as to be capable of traverse operation, and is configured to move the optical head 6 in the radial direction of the disk A by the traverse operation of the traverse mechanism 22. Has been.

  In the recording apparatus configured as described above, the strips 10a and 10a of the leaf springs 10 and 10 are elastically pressed against the pivots 3 and 3 projecting from the both side portions 4a and 4a of the sub chassis 4, so that the pivot 3 , 3 as a fulcrum can be prevented from occurring in the sub chassis 4 and the tilt adjustment position of the sub chassis 4 can be easily stabilized. Moreover, since the plate springs 10 and 10 are in contact with the peripheral surfaces of the pivots 3 and 3 and the pivots 3 and 3 are elastically pressed in the direction of the bearing bodies 9 and 9, the leaf springs 10 and 10 It can be arranged at a position lower than the other surface of the sub chassis 4 (surface opposite to the main chassis), and the thickness in the direction in which the main chassis 2 and the sub chassis 4 face each other, and hence the thickness of the entire recording apparatus, is reduced. In addition, since one leaf spring 10 has an elastic member 10c that elastically presses the sub chassis 4 in the longitudinal direction of the tilt center line, the position adjusting spring of the sub chassis 4 in the tilt center line direction can be reduced, The number of parts can be reduced. Further, the position of the sub-chassis 4 in the tilt center line direction is adjusted by the elastic pressure portion 10c of one leaf spring 10 and the adjusting screw 21 screwed to the holding piece 2c of the main chassis 2.

  In the above-described embodiment, the pivots 3 and 3 projecting from the both side portions 4a and 4a of the sub chassis 4 are configured to be elastically pressed by the leaf springs 10 and 10. However, for example, FIGS. As described above, the vicinity of the pivotal support portion of the sub chassis 4 may be pressed. 6 is a perspective view showing another configuration of the main part, and FIG. 7 is a sectional view taken along line VII-VII in FIG.

  In the recording apparatus of this embodiment, pivots 3a, 3a are provided perpendicularly to the tilt center line on one surface in the vicinity of the longitudinal center of both side portions 4a, 4a of the sub chassis 4, and the pivots 3a, In the vicinity of 3a, in other words, in the vicinity of the pivot position, lower elastic pressure portions 41, 41 are provided on one side of the other surface of the subchassis 4, and the leaf springs 10, 10 are provided on the elastic pressure portions 41, 41. The strip plate portions 10a and 10a are in contact with each other, and the elastic pressure-receiving portions 41 and 41 are elastically pressed in the direction of the main chassis 2, and the elastic pressure portion 10c provided on one leaf spring 10 is The sub-chassis 4 is elastically pressed in the longitudinal direction of the tilt center line in contact with the tip, and the tilt center of the sub-chassis 4 is formed by the elastic pressure portion 10c and the adjusting screw 21 screwed to the holding piece 2c of the main chassis 2. Configured to adjust the position in the line direction That.

Even in this embodiment, since the leaf springs 10 and 10 are elastically pressing the elastic pressure-receiving parts 41 and 41 projecting from the both side parts 4a and 4a of the sub chassis 4, the rotational moment with the pivotal part as a fulcrum is provided. Can be prevented from occurring in the subchassis 4, and the tilt adjustment position of the subchassis 4 can be easily stabilized. Moreover, the leaf springs 10 and 10 have the strip plate portions 10a and 10a in contact with the elastic pressure portions 41 and 41 and elastically press the elastic pressure portions 41 and 41 in the bearing body 9 and 9 directions. Can be disposed at a position lower than the other surface (upper surface) of the sub-chassis 4, and the thickness in the direction in which the main chassis 2 and the sub-chassis 4 face each other, that is, the thickness of the entire recording apparatus can be reduced.
The recording apparatus of the present invention is not limited to the optical recording apparatus.

1 is a plan view showing a configuration of a recording apparatus according to the present invention. It is the front view which notched a part of recording device concerning the present invention. FIG. 3 is an enlarged longitudinal front view of a main part of the recording apparatus according to the present invention. FIG. 3 is an enlarged plan view of a main part of the recording apparatus according to the present invention. It is a perspective view of the leaf | plate spring of the recording device which concerns on this invention. It is a perspective view which shows the other structure of the principal part of the recording device which concerns on this invention. It is sectional drawing of the VII-VII line of FIG.

Explanation of symbols

1 Electric motor
2 Main chassis 3, 3a Axis 4 Sub chassis 6 Optical head 10 Leaf spring 10c Repression part 41 Repression part

Claims (4)

  A main chassis on which an electric motor for rotating a recording medium is mounted; a sub-chassis supported on the main chassis so that tilt adjustment is possible by a pivot; and data writing and / or reading on the recording medium supported by the sub-chassis In the recording apparatus including the optical head, the pivot extends from both sides of the sub-chassis in parallel with the tilt center line, and the main chassis contacts the peripheral surface of the pivot, and the pivot A recording device comprising a leaf spring that elastically presses the disk in the radial direction.   The recording apparatus according to claim 1, wherein the leaf spring includes a pressing portion that presses the sub chassis in a longitudinal direction of a tilt center line.   The recording apparatus according to claim 2, wherein one end portion of the leaf spring is attached to the main chassis, and the elastic portion is formed integrally with the one end portion.   A main chassis on which an electric motor for rotating a recording medium is mounted, a sub-chassis whose one surface is opposed to the main chassis and supported by a pivot means so as to be capable of tilt adjustment, and supported by the sub-chassis, the recording medium In the recording apparatus provided with an optical head for writing and / or reading data, the sub-chassis has a lower pressure-sensitive portion near the pivot position on the one surface side than the other surface of the sub-chassis, The recording apparatus according to claim 1, wherein the main chassis includes a leaf spring that presses the pressed portion toward the main chassis.

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