JP4433944B2 - Optical disk drive device - Google Patents

Description

  The present invention relates to an optical disc drive apparatus for reproducing information recorded on an optical disc and recording information on the optical disc.

  Conventionally, an optical disk drive device is configured by assembling various components such as a turntable for placing an optical disk on a chassis and an optical pickup, and recording information on the optical disk by irradiating the recording surface of the optical disk with the optical pickup. The information recorded on the optical disk can be reproduced by reading the reflected light of the laser beam irradiated on the recording surface of the optical disk.

  This optical pickup is adapted to irradiate laser light at an appropriate angle (perpendicular to the recording surface) with respect to the recording surface of the optical disc in order to accurately record information on the optical disc or reproduce information from the optical disc. The tilt angle is adjusted. For example, Patent Documents 1 and 2 propose an optical pickup that includes a tilt angle adjusting unit that can be reduced in size and weight and that can perform tilt adjustment with high accuracy.

  In addition, the optical pickup itself is not provided with a tilt angle adjusting means, but a first chassis assembled with a turntable on which an optical disk is placed and a second chassis assembled with an optical pickup are arranged to face each other. There is also an optical disk drive device in which the tilt angle of the optical pickup is appropriately adjusted by adjusting the tilt of the chassis.

  FIG. 6 is an exploded perspective view of a conventional optical disc drive apparatus using two chassis. The optical disk drive device shown in FIG. 6 is configured by arranging an upper chassis 10 assembled with an optical pickup 40 and a lower chassis 20 to which a spindle motor 50 is fixed via a turntable holding member 30 so as to face each other. .

  Specifically, the upper chassis 10 is made of a metal plate-like member having an opening 14 at the center, and a plurality of holes for assembling various components are provided at predetermined positions. The upper chassis 10 is formed with support portions 15 and 16 for supporting the two guide shafts 43 and 44 in parallel at the four corners of the periphery of the opening 14. In addition, a hook-shaped locking piece 11 is formed at the approximate center of the long side of the upper chassis 10 on which the support portion 15 is formed, and the hook is provided at a position where the long side is substantially divided into three on the other long side. The locking pieces 12 and 13 are formed. The support portions 15 and 16 and the locking pieces 11, 12, and 13 are integrally formed by attaching and fixing a resin to a predetermined position of the metal upper chassis 10 by outsert molding. Further, an optical pickup driving device 70 for moving the optical pickup 40 in the radial direction of the optical disk is disposed on the lower surface of the long side of the upper chassis 10 where the hook-like locking pieces 12 and 13 are formed.

  The optical pickup 40 has two guide shafts 43 and 44 inserted into both ends thereof, and both ends of the guide shafts 43 and 44 are fixed to support portions 15 and 16 formed in the upper chassis 10 with screws.

  The lower chassis 20 is made of a metal plate-like member having an opening 22 at the center, and a part of the lower chassis 20 is folded back by pressing to be attached to a housing (not shown) of the optical disk drive device. It is formed at the four corners. In addition, a plurality of holes for assembling various components are provided at predetermined positions. Further, a tilt angle adjusting device 60 is disposed at a predetermined position of the lower chassis 20.

  The turntable holding member 30 is made of a substantially U-shaped plate-shaped member made of resin, and holds a spindle motor 50 that drives a turntable (not shown) on which an optical disk is placed. A pair of opposing sides of the turntable holding member 30 can be engaged with the hook-shaped locking pieces 11, 12, 13 at positions corresponding to the hook-shaped locking pieces 11, 12, 13 formed on the upper chassis 10. Various gate-like engaging portions 31, 32, 33 are formed. The turntable holding member 30 is fixed to the lower chassis 20 through screws from above at, for example, five locations. The spindle motor 50 is fixed with screws from below the lower chassis 20 via a turntable holding member 30 fixed to the lower chassis 20.

Then, the upper chassis 10 assembled with the optical pickup 40 and the lower chassis 20 to which the spindle motor 50 is fixed via the turntable holding member 30 are arranged to face each other, and the three hook-shaped locking pieces 11, 12, 13 is engaged while maintaining a predetermined interval. Specifically, after the two hook-shaped locking pieces 12 and 13 formed on the upper chassis 10 are engaged with the gate-shaped engaging portions 32 and 33 of the turntable holding member 30, the remaining hook-shaped locking pieces are engaged. The pieces 11 are pressed into the corresponding gate-like engaging portions 31 from above and fitted.
Japanese Patent Laid-Open No. 10-49883 JP 2000-99954 A

  As described above, in the optical disk drive device shown in FIG. 6, the hook-shaped locking pieces 11, 12, 13 are engaged with the corresponding gate-shaped engaging portions 31, 32, 33, so The side chassis 20 is disposed opposite to the chassis. However, since the gate-shaped engaging portions 31 corresponding to the hook-shaped locking pieces 11 are made of a high-strength resin material in consideration of impact resistance, the hook-shaped locking pieces can be fitted with a relatively large force to fit. 11 and the turntable holding member 30 need to be bent, workability is poor, and the hook-shaped locking piece 11 may be damaged due to excessive force applied.

  The present invention provides an optical disc drive apparatus that can be adjusted by a pair of chassis that oppose the optical axis of laser light emitted from an optical pickup, and that can significantly improve workability in an assembly process. Objective.

The present invention has been made to solve the above-mentioned problems, and an optical pickup for recording or reproducing information by irradiating a laser beam onto a recording surface of a disk-shaped recording medium mounted on a turntable is assembled. An optical disc drive apparatus in which a first chassis and a second chassis on which a turntable on which a disc-shaped recording medium is placed are assembled are opposed to each other so as to be capable of tilt adjustment while maintaining a predetermined interval . One chassis is composed of a substantially rectangular frame having an opening at the center, hook-shaped locking pieces are formed at two different locations on one long side, and a screw is inserted into one location on the other long side. holes are formed, the second chassis is formed of a substantially rectangular frame body having an opening at the center, a turntable for placing a disc-shaped recording medium at a substantially U-shaped plate-like member Lifting configured to be capable turntable holding member is fixed along the frame of the second chassis, the second chassis, a rotating body having an inclined principal surface, and a drive motor for rotating and driving the rotary body And a tilt angle adjusting device in which a rotation transmitting means is arranged between the rotating shaft of the drive motor and the rotating body, and the other one of the other long sides of the first chassis A protrusion that contacts the main surface of the rotating body is formed, and the turntable holding member is formed with an engaging portion that can be engaged with the hook-shaped locking piece at one of one of a pair of opposing sides. In addition, a screw hole that can be screwed with an engagement screw inserted into the screw insertion hole is formed at one place on the other side, and the two hook-shaped locking pieces are formed at the two engagement portions. Individually engaged and through the screw insertion hole into the screw hole The other long side of the first chassis is coupled with the engaging portion and the hook-shaped locking piece together with the protruding portion that is in contact with the main surface by rotation of the rotating body. The position where the other long side of the first chassis is closest to the disk side is regulated by the screw head of the engagement screw. The tilt of the chassis is adjusted.

  That is, conventionally, hook-shaped locking pieces are formed on a pair of opposing long sides of the first chassis, respectively, and the hook-shaped locking pieces are fitted into engaging portions formed on the second chassis so as to face each other. The hook-shaped locking piece formed on one long side of the first chassis is left as it is, a screw insertion hole is formed on the other long side, and one side is used instead of the hook-shaped locking piece. It was made to engage with a screw. The number of hook-shaped locking pieces and screw insertion holes provided in the first chassis is not particularly limited. For example, two hook-shaped locking pieces and one screw insertion hole are provided, It is preferable to support the first chassis and the second chassis.

  Further, the substantially U-shaped plate-shaped member is configured to be able to hold a turntable on which a disk-shaped recording medium is placed, and includes a turntable holding member fixed along the frame of the second chassis, The engaging portion and the screw hole are formed in the turntable holding member. That is, a turntable holding unit in which a turntable holding part (spindle motor holding part), an engaging part with a hook-like locking piece, and a screw hole that can be screwed into an engaging screw are integrally formed by resin molding. The member is provided separately from the second chassis. Accordingly, the turntable holding member, the engaging portion of the hook-like locking piece, the screw hole that can be screwed to the engaging screw, and the like only by fixing the turntable holding member to the second chassis by screwing, for example. Can be provided in the second chassis relatively easily.

  According to the present invention, in the optical disc drive apparatus, the hook-shaped locking piece is formed on one long side of the first chassis (upper chassis) formed of a substantially rectangular frame having an opening at the center and the other. A screw insertion hole is formed in the long side of the second chassis, and an opening is formed in the center of the second chassis (lower chassis). An engaging portion that can be engaged, and a screw hole that can be screwed with an engaging screw inserted into the screw insertion hole on the other long side, and the hook-shaped locking piece is engaged with the engaging portion. And by engaging an engagement screw of a predetermined length into the screw hole through the screw insertion hole, the other length that is the side of the first chassis that is tilt-adjusted by the screw head of the engagement screw Since the position closest to the disk side of the side is limited, the first shear If it is possible to remarkably improve the workability of the second chassis assembly process.

  Conventionally, the first chassis and the second chassis are engaged only with the resin hook-shaped locking pieces. However, since a part of the first chassis is engaged with the metal engaging screw, it may be dropped or the like. It is possible to improve the resistance to impact.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  1 is an exploded perspective view of the optical disk drive device according to the present embodiment, FIG. 2 is a plan view of the upper chassis 10 (viewed from below in FIG. 1), and FIG. 3 is a plan view of the lower chassis 20. FIG. 4 is a plan view of the turntable holding member 30. In addition, the same code | symbol is used about the site | part and member same as the conventional optical disk drive device shown in FIG.

  The optical disk drive device according to the present embodiment is configured such that the upper chassis 10 to which the optical pickup 40 is assembled and the lower chassis 20 to which the spindle motor 50 is fixed via the turntable holding member 30 are arranged to face each other. The

Specifically, the upper chassis 10 is made of a metal plate-like member having an opening 14 at the center, and a plurality of holes for assembling various components are provided at predetermined positions. The upper chassis 10 is formed with support portions 15 and 16 for supporting the two guide shafts 43 and 44 in parallel at the four corners of the periphery of the opening portion 14. In addition, a screw insertion hole 17 is formed at one place on the long side of the upper chassis 10 where the support portion 15 is formed, and the other long side is at a position where the long side is substantially divided into three. Hook-shaped locking pieces 12 and 13 are formed. The support portions 15 and 16 and the locking pieces 12 and 13 are integrally formed by attaching and fixing a resin to a predetermined position of the metal upper chassis 10 (outsert molding). Further, an optical pickup driving device 70 for moving the optical pickup 40 in the radial direction of the optical disk is disposed on the lower surface of the long side of the upper chassis 10 where the hook-like locking pieces 12 and 13 are formed.

  The optical pickup 40 has two guide shafts 43 and 44 inserted into both ends thereof, and both ends of the guide shafts 43 and 44 are fixed to support portions 15 and 16 formed in the upper chassis 10 with screws. In addition, an engaging member 41 having a protrusion that engages with a spirally formed groove on the drive shaft 72 is assembled to one end of the optical pickup 40, and the engaging member 41 is driven by a spring 42. It is biased to the 72 side. With such a configuration, when the drive motor 71 of the optical pickup driving device 70 is rotated, the optical pickup 40 slides along the guide shafts 43 and 44 in the radial direction of the optical disc.

  The lower chassis 20 is made of a metal plate-like member having an opening 22 at the center, part of which is folded back by pressing, and is fixed to a housing (not shown) of the optical disk drive device at four corners. A portion 21 is formed. In addition, a plurality of holes for assembling various components are provided at predetermined positions. In particular, a screw hole 23 is provided at a position corresponding to the screw insertion hole 17 of the upper chassis 10. Further, a tilt angle adjusting device 60 is disposed at a predetermined position of the lower chassis 20.

  The tilt angle adjusting device 60 includes a rotating body 61 having an inclined main surface 61 a and a driving motor 63 that rotationally drives the rotating body 61, and is disposed between the rotating shaft 63 a of the driving motor 63 and the rotating body 61. A relay gear 62 is arranged as a rotation transmitting means. The protrusion 18 formed on the lower surface of the upper chassis 10 is in contact with the main surface 61a of the rotating body. By rotating the rotating body 61 by driving the drive motor 63, the inclination of the upper chassis 10 is increased. Can be adjusted.

  The turntable holding member 30 is a resin-made substantially U-shaped plate-like member, and a spindle motor holding portion (turntable holding portion) that holds a spindle motor 50 that drives a turntable (not shown) on which an optical disk is placed. 35). At positions corresponding to the hook-shaped locking pieces 12 and 13 formed on the upper chassis 10 of the turntable holding member 30, gate-shaped engaging portions 32 and 33 that can be engaged with the hook-shaped locking pieces 12 and 13 are provided. Is formed. A screw hole 34 is provided at a position corresponding to the screw insertion hole 17 of the upper chassis 10. The turntable holding member 30 is fixed to the lower chassis 20 through screws from above, for example, at five locations (including the screw holes 34). The spindle motor 50 is fixed with screws from below the lower chassis 20 via a turntable holding member 30 fixed to the lower chassis 20.

  Then, the upper chassis 10 to which the optical pickup 40 is assembled and the lower chassis 20 to which the spindle motor 50 is fixed via the turntable holding member 30 are arranged to face each other. Specifically, after engaging the two hook-shaped locking pieces 12 and 13 formed on the upper chassis 10 with the gate-shaped engaging portions 32 and 33 of the turntable holding member 30, the engaging screw 80 is moved to the upper side. The screw holes 34 of the turntable holding member 30 and the screw holes 23 of the lower chassis 20 are screwed through the screw insertion holes 17 of the chassis 10.

Here, as shown in FIG. 5, the engaging screw 80 has a screwless portion 82 between the screw head 81 and the threaded portion 83. Further, the hook-shaped locking pieces 12 and 13 are engaged with the gate-shaped engaging portions 32 and 33, and the screw head 81 of the engaging screw 80 screwed into the screw hole 34 through the screw insertion hole 17 is connected to the upper chassis 10. This restricts the position of the other long side closest to the disc side, which is the side to be adjusted in tilt .

  As described above, conventionally, the hook-like locking pieces 11, 12, 13 formed on the pair of opposing long sides of the upper chassis 10 are engaged with the engaging portions 31, 32, 33 formed on the turntable holding member 30. Whereas the upper chassis 10 and the lower chassis 20 are opposed to each other by being fitted, in the optical disk drive device of the present embodiment, a hook-shaped locking piece formed on one long side of the upper chassis 10 12 and 13 are left as they are, a screw insertion hole 17 is formed on the other long side, and one side is engaged with a screw head 81 of an engagement screw 80 instead of the hook-like locking piece 11, and both are arranged opposite to each other. I am doing so.

  Thereby, workability | operativity of the assembly process of the upper side chassis 10 and the lower side chassis 20 can be improved significantly. In addition, since the conventional engagement with only the hook-shaped locking piece 11 made of resin is made to engage with the engagement screw 80 made of metal, the resistance to impacts such as dropping can be improved. .

  As mentioned above, although the invention made by this inventor was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.

It is a disassembled perspective view of the optical disk drive device concerning this embodiment. FIG. 2 is a plan view of the upper chassis 10 (viewed from below in FIG. 1). 2 is a plan view of a lower chassis 20. FIG. 3 is a plan view of a turntable holding member 30. FIG. 3 is a side view of a screw 80. FIG. It is a disassembled perspective view of the conventional optical disk drive device.

10 Upper chassis (first chassis)
12, 13 Hook-shaped locking piece 17 Screw insertion hole 20 Lower chassis (second chassis)
23 Screw hole 30 Turntable holding member 32, 33 Gate-like engagement portion 34 Screw hole 40 Optical pickup 50 Spindle motor 60 Tilt angle adjustment device 70 Optical pickup driving device 80 Engagement screw

Claims (1)

A first chassis in which an optical pickup that records or reproduces information by irradiating a recording surface of a disk-shaped recording medium mounted on the turntable is assembled, and a turntable on which the disk-shaped recording medium is placed are assembled. An optical disk drive device, wherein the second chassis is opposed to the second chassis so as to be tilt-adjustable while maintaining a predetermined interval,
The first chassis is configured by a substantially rectangular frame having an opening in the center, and hook-shaped locking pieces are formed at two locations on one long side and at one location on the other long side. Screw insertion hole is formed,
The second chassis is configured by a substantially rectangular frame having an opening at the center, and a turntable configured to hold a turntable on which a disc-shaped recording medium is placed by a substantially U-shaped plate member. The holding member is fixed along the frame of the second chassis ;
The second chassis is composed of a rotating body having an inclined main surface and a drive motor that rotationally drives the rotating body, and a rotation transmission means is disposed between the rotating shaft of the driving motor and the rotating body. A tilt angle adjustment device is provided,
A projecting portion that is in contact with the main surface of the rotating body is formed at another location on the other long side of the first chassis.
The turntable holding member is formed with an engaging portion that can be engaged with the hook-shaped locking piece at one of one pair of opposing sides, and is inserted into the screw insertion hole at one place on the other side. A screw hole that can be screwed into the engagement screw is formed,
The two hook-shaped locking pieces are individually engaged with the two engaging portions, and the engaging screw is screwed into the screw hole through the screw insertion hole,
With the rotation of the rotating body, the other long side of the first chassis together with the protrusion abutting on the main surface is a disc with the engaging portion between the engaging portion and the hook-shaped locking piece as a fulcrum. The position of the other long side of the first chassis that is closest to the disk side is regulated by the screw head of the engagement screw so that the inclination of the first chassis is adjusted. An optical disk drive device characterized by being configured .

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