JP3805091B2 - Disc player - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk reproducing apparatus that reproduces an optical disk such as a CD-ROM or a DVD.
[0002]
[Prior art]
In recent years, a thin optical disk drive incorporated in a small information processing apparatus such as a notebook personal computer has a movable body called a drawer (meaning a drawer) equipped with a mechanism for driving and reproducing a disk, which can be freely inserted and removed from a fixed portion. Is the mainstream. The fixed substrate in the drawer of the optical disk drive and the optical pickup are electrically connected by a flexible printed circuit (hereinafter referred to as FPC).
[0003]
FIG. 4 shows the FPC routing state in the drawer in the conventional optical disk drive.
[0004]
In the figure, 21 is a mechanical chassis. The mechanical chassis 21 is provided with a guide shaft 22 in parallel therewith. As shown in FIGS. 4A and 4B, the optical pickup 23 has a radius of an optical disk (not shown) on the guide shaft 22. It is supported movably in the direction. The mechanical chassis 21 is supported by a drawer housing 25 and a drawer lid 24 fixed by screws to the drawer housing 25 via a buffer member 26 such as a damper rubber, thereby generating vibrations inside the drawer. It suppresses external transmission of vibration from the source, for example, vibration generated when the eccentric disk is driven at high speed.
[0005]
Both sides of the drawer 30 are covered with a drawer lid 24 and a mechanical cover 27 for the purpose of protecting the internal structure and aesthetics. The mechanical cover 27 is a cover that covers the surface of the drawer 30 on which the optical disk is mounted. The mechanical cover 27 is provided with an opening for exposing the lens position of the optical pickup 23 and an opening for exposing the disk drive mechanism (disk table and disk chucking section). The mechanical cover 27 is fixed to the mechanical chassis 21 with screws 28.
[0006]
The FPC 29 that electrically connects the fixed substrate (not shown) in the drawer 30 and the optical pickup 23 is drawn out from the surface of the optical pickup 23 on the outer peripheral side of the disk, and forms a U-shaped folded portion 29a. Is routed to a fixed substrate (not shown) disposed on the inner peripheral side of the disk from the position of. The FPC 29 from the U-shaped folded portion 29 a to the fixed substrate (not shown) is disposed so as to be close along the inner wall surface of the drawer lid 24.
[0007]
However, in such a routing structure of the FPC 29, the FPC 29 is caught by the optical pickup 23 when the optical pickup 23 is moved toward the inner peripheral side of the disk, and this causes a semi-permanent deformation of the FPC 29. In the worst case, the signal line breakage of the FPC 29 may occur.
[0008]
One of the causes of the FPC 29 being caught by the optical pickup 23 is that the mechanical chassis 21 equipped with a disk drive reproduction mechanism and the mechanical cover 27 is screwed is supported in a floating structure with respect to the drawer housing 25 and the drawer lid 24. It is mentioned that. That is, fluctuations in the positional relationship between the optical pickup 23 and the drawer lid 24 due to internal vibrations, etc., momentarily generate a deflection 29b in the FPC 29 disposed close to the inner wall surface of the drawer lid 24 as shown in FIG. As a result of this bending portion 29b, the FPC 29 is caught by the optical pickup 23.
[0009]
Therefore, a method for preventing the FPC 29 from being caught by the optical pickup 23 by partially fixing the FPC 29 to the drawer lid 24 can be considered. However, in the disk drive assembly process, the drawer lid 24 is attached at the final stage of the drawer assembly process, and at the time of disassembly, the drawer lid 24 is removed at the initial stage. For this reason, the method of fixing the FPC 29 to the drawer lid 24 is Another problem has been that the assembly work efficiency and the dismantling work efficiency during maintenance are reduced.
[0010]
[Problems to be solved by the invention]
As described above, in the conventional disk reproducing apparatus, the occurrence of an accident involving the flexible substrate by the optical pickup during the conveyance of the optical pickup has been a problem. In addition, in the method of bonding and fixing the flexible substrate to the drawer lid to prevent such an entrainment accident, there has been a problem that disassembling work during assembly work or maintenance becomes difficult.
[0011]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a disc reproducing apparatus that can effectively prevent the occurrence of a flexible substrate entrainment phenomenon due to an optical pickup during conveyance of the optical pickup. .
[0012]
[Means for Solving the Problems]
In order to achieve the above object, a disc reproducing apparatus according to the present invention includes an optical pickup that reads information from a disc, and a transport mechanism that transports the optical pickup in a radial direction of the disc, as described in claim 1. A U-shape formed by a fixed substrate fixed at a fixed position, a flexible substrate that electrically connects the optical pickup and the fixed substrate, and the flexible substrate formed in a space on the outer periphery side of the disc from the optical pickup. And a cover that covers the internal structure including the optical pickup, the transport mechanism, the fixed substrate, and the flexible substrate with a surface facing the surface of the disk, and an inner wall surface of the cover. Slip between the inner wall surface and the surface of the flexible substrate between the folded portion and the fixed substrate, which is in contact with the inner wall surface, is suppressed. Characterized by comprising a friction portion.
[0017]
In the disk reproducing apparatus of the present invention, by providing a high friction resistance portion on the inner wall surface of the cover, sliding (sliding) between the inner wall surface of the cover and the flexible substrate during transport of the optical pickup can be suppressed. Even when the optical pickup comes into contact with the flexible substrate, the flexible substrate is less likely to be caught by the optical pickup.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.
[0019]
FIG. 1 is a perspective view showing a configuration of a so-called notebook personal computer compatible CD-ROM drive to which the present invention is applied.
[0020]
This CD-ROM drive includes a drawer 1 which is a movable body on which a disk drive / reproduction mechanism for driving and reproducing a disk (not shown) is mounted, and a cabinet 2 in which the drawer 1 can be stored. The cabinet 2 is composed of an upper cabinet and a lower cabinet, but the upper cabinet is not shown in the figure.
[0021]
Guide rails 3 having a U-shaped cross section for guiding and supporting the drawer 1 are formed on the inner walls on both sides of the cabinet 2, and guide protrusions 4 protruding from both sides of the drawer 1 are not shown in the guide rail 3. Each is fitted through a slide rail.
[0022]
The drawer 1 includes a disk mounting portion 6 formed of a recess corresponding to the outer shape of the disk, a disk drive mechanism such as a disk motor (not shown) and a turntable 7, an optical pickup 8 for reading information from the disk, and this optical A pick-up feed mechanism (not shown) for transporting the pick-up 8 in the radial direction of the disk is provided. The disc table 7 is provided with a disc chuck mechanism 10 that is fitted in the center hole of the optical disc to position and hold the disc in the center of the disc table 7.
[0023]
FIG. 2 shows the configuration of the drawer 1 in more detail. The figure shows a state in which the inside of the drawer is exposed by removing the mechanical cover 11 covering a part of the disk mounting portion (recessed portion) 6 of the drawer 1. The mechanical cover 11 is provided with an opening 11a for exposing the lens position of the optical pickup 8 and an opening 11b for exposing the disk drive mechanism (disk table 7 and disk chucking mechanism 10). The mechanical cover 11 is fixed to the mechanical chassis 12 of the drawer 1 with a plurality of screws and claws 13.
[0024]
On the other hand, the surface of the drawer 1 opposite to the disk mounting surface is entirely covered by the drawer lid 14, and the drawer lid 14 and the mechanical cover 11 protect the internal structure of the drawer 1 and maintain its aesthetic appearance. Yes.
[0025]
As shown in the figure, when the mechanical cover 11 is removed from the drawer 1, the FPC 9 that electrically connects a fixed substrate (not shown) disposed below the disk drive mechanism and the optical pickup 8 forms a U-shaped folded portion. It can be seen that they are arranged. The fixed substrate is a substrate on which, for example, a disk drive mechanism motor (disk motor) is mounted.
[0026]
FIG. 3 is a side sectional view showing the internal structure of the drawer 1.
[0027]
In the figure, 12 is a mechanical chassis. A guide shaft 17 is disposed in parallel with the mechanical chassis 12, and the optical pickup 8 is supported on the guide shaft 17 so as to be movable in the radial direction of an optical disk (not shown). The mechanical chassis 12 is also equipped with a disk drive mechanism (disk table 7 and disk chucking mechanism 10). The mechanical chassis 12 is supported by a drawer housing 18 and a drawer lid 14 fixed by screws to the drawer housing 18 via a buffer member 19 such as a damper rubber, thereby generating a vibration generation source inside the drawer. For example, external transmission of vibration generated when the eccentric disk is driven at a high speed, and external shock absorption are performed.
[0028]
Both sides of the drawer 1 facing the disk surface are covered with a drawer lid 14 and a mechanical cover 11 for the purpose of protecting the internal structure and aesthetics. A mechanical cover 11 covering the surface on which the optical disk is mounted is fixed to the mechanical chassis 12 with screws 15.
[0029]
The FPC 9 that electrically connects the fixed substrate (not shown) in the drawer 1 and the optical pickup 8 is drawn out from the disk outer periphery side of the optical pickup 8 to form a U-shaped folded portion 9a. Further, it is routed to a fixed substrate (not shown) disposed on the inner peripheral side of the disk. The FPC 9 from the U-shaped folded portion 9a to the fixed substrate (not shown) is disposed along the inner wall surface of the mechanical cover 11 or the drawer lid 14 (in this embodiment, the mechanical cover 11) so as to be close thereto.
[0030]
On the inner wall surface of the drawer lid 14, a high frictional resistance portion 9 e is provided on the surface facing the FPC 9 from the U-shaped folded portion 9 a to the fixed substrate. The high frictional resistance portion 9e is for suppressing sliding contact (sliding) between the inner wall surface of the drawer lid 14 and the FPC 9 when the optical pickup 8 is transported.
[0031]
As described above, the mechanical chassis 12 is provided by providing the high frictional resistance portion 9e on the inner wall surface of the drawer lid 14 that is close to the FPC 9 and suppressing the sliding (sliding) between the inner wall surface of the drawer lid 14 and the FPC 9. Even when the optical pickup 8 comes into contact with the FPC 9 at the time of the vibration, the FPC 9 is less likely to be caught by the optical pickup 8.
[0032]
FIG. 3A shows a state where the optical pickup 8 is located on the innermost circumferential side of the disk within the transportable range, and FIG. 3B shows a state when the optical pickup 8 is located on the innermost circumferential side of the disk. ing. The point a in FIG. 3B is the start / end position of the folded portion 9a of the FPC 9 when the optical pickup 8 is located on the innermost circumferential side of the disc. Therefore, if the high frictional resistance portion 9e is provided at least from the point a on the inner circumferential side of the disk, the desired effect can be obtained.
[0033]
As a specific method for providing the high frictional resistance portion 9e on the inner wall surface of the drawer lid 14, a sheet-like molded product (for example, knurled rubber) made of a rubber-based or low-adhesive adhesive material or the like is used as the drawer lid 14. And a method of applying a paint (rubber-like, peach skin, etc.) that provides the required surface tackiness after curing.
[0034]
In the above embodiment, the example in which the high frictional resistance portion 9e is provided on the drawer lid 14 has been described. Conversely, the drawer lid 14 of the FPC 9, particularly the FPC 9 from the U-shaped folded portion 9a to the fixed substrate, An equivalent effect can be expected even if a high frictional resistance portion is provided on the opposite side surface.
[0035]
As described above, according to the present embodiment, it is possible to prevent the FPC from being caught by the optical pickup without adding new components, and it is possible to provide a thin CD-ROM drive.
[0036]
The present invention is not limited to an apparatus that reproduces a CD-ROM as described above, but can be applied to other disk-shaped recording media such as a drive that reproduces a DVD.
[0037]
【The invention's effect】
As described above, according to the disk reproducing apparatus of the present invention, by providing the high frictional resistance portion on the inner wall surface of the cover, the sliding (sliding) between the inner wall surface of the cover and the flexible substrate during transport of the optical pickup is suppressed. For example, even when a situation occurs in which the optical pickup comes into contact with the flexible substrate during vibration or the like, the flexible substrate is less likely to be caught by the optical pickup.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall configuration of a CD-ROM drive which is an embodiment to which the present invention is applied.
FIG. 2 is a perspective view showing a configuration of a drawer of the CD-ROM drive of the present embodiment.
FIG. 3 is a side sectional view showing the internal structure of the drawer of the CD-ROM drive of the present embodiment.
FIG. 4 is a side sectional view showing an internal structure of a drawer of a conventional CD-ROM drive.
FIG. 5 is a diagram showing an FPC entrainment phenomenon caused by an optical pickup generated in a conventional CD-ROM drive.
[Explanation of symbols]
1 ... drawer 7 ... turntable 8 ... optical pickup 9 ... FPC
9a: FPC U-shaped folded portion 9e: High friction resistance 10: Disc chuck mechanism 11: Mechanical cover 12 ... Mechanical chassis 14 ... Drawer lid 17 ... Guide shaft 19 ... Buffer member

Claims (1)

An optical pickup that reads information from the disc;
A transport mechanism for transporting the optical pickup in the radial direction of the disk;
A fixed substrate fixed in place;
A flexible substrate that electrically connects the optical pickup and the fixed substrate;
A U-shaped folded portion formed by the flexible substrate formed in a space on the outer periphery side of the disc from the optical pickup;
A cover that covers the internal structure including the optical pickup, the transport mechanism, the fixed substrate, and the flexible substrate with a surface facing the surface of the disk;
A high friction resistance portion provided on an inner wall surface of the cover and configured to suppress slippage between the inner wall surface of the cover and the surface of the flexible substrate between the folded portion and the fixed substrate; A disc player characterized by that.

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