JP2000090656A - Disc playback apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the space occupied by a flexible printed board for interconnecting circuit boards which a drawer and a cabinet have and shorten the signal line length in a disc playback apparatus having a disc drive playback mechanism mounted in the drawer removably insertable in the cabinet. SOLUTION: The proportion occupied by a wiring space of a flexible printed board 30 in a cabinet 22 can be reduced and the signal line length can be shortened by forming the layout shape on a flat face of the flexible printed board 30 like a straight strip. The height of a swell of a loop-like free part 30a can be lowered and when the drawer 21 is inserted in or removed from the cabinet 22, the damage trouble, etc., of the flexible printed board 30 due to the interference of the drawer 21 with the flexible printed board 30 are prevented by adhering the loop-like free part 30a near a folded part 30c to a fixed part 30b plane to plane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to, for example, a CD-RO
The present invention relates to a disk reproducing apparatus for reproducing an optical disk such as M or DVD.

[0002]

2. Description of the Related Art In recent years, the internal structure of a CD-ROM drive compatible with a so-called notebook type personal computer is as shown in FIG. As shown in FIG. 1, the CD-ROM drive is composed of a drawer 1 which is a movable body on which a disk drive / reproducing mechanism for driving and reproducing a disk (not shown) is mounted, and a cabinet 2 in which the drawer 1 can be stored. It is configured. Although the cabinet 2 includes an upper cabinet and a lower cabinet, illustration of the upper cabinet is omitted in FIG. Drawer 1
Can move in and out of the cabinet 2 in the directions of arrows X1-X2.

A drawer 1 has a disk drive mechanism such as a disk motor (not shown) and a turntable 6, and a laser beam is irradiated to a recording area of a rotating disk to take in the reflected light so that data is read from the disk. An optical pickup (not shown) for reading and a pickup feed mechanism (not shown) for transporting the optical pickup in the radial direction of the disk are provided. The mechanism for driving the disk and the mechanism for supporting and transporting the optical pickup are as follows.
The mechanical chassis is mounted on a single mechanical chassis, and the mechanical chassis is supported by a main body of the drawer 1 and the like in a floating structure via a vibration isolating member such as a damper rubber.

Circuit boards 11 and 9 are provided in the drawer 1 and the cabinet 2, respectively. A motor board 11 which is a circuit board on the drawer 1 side is connected to a flexible printed board 10 which is electrically connected to a disk motor, a drive circuit for the disk motor, and a main board 9 which is a circuit board on the cabinet 2 side. Connector 1
4 etc. are implemented. On the other hand, the main board 9 on the cabinet 2 side includes a microcomputer and a memory for controlling the CD-ROM drive and a flexible printed board 10 for electrical connection with the motor board 11 on the drawer 1 side. The connector 17 and the like are mounted.

The flexible printed board 10 connected between the connectors 14 and 17 of the main board 9 and the motor board 11 is connected to the drawer 1 with respect to the cabinet 2.
It is composed of a loop-shaped free portion 10a for absorbing a change in the distance between the substrates caused by taking in and out, and an adhesive fixing portion 10b to the cabinet bottom plate surface (the shaded portion in the figure). The loop-shaped free portion 10a and the adhesive fixing portion 10
b are shifted from each other on the plane, and one end of each is connected via a crank-shaped folded portion 10c.

[0006]

However, such a connection configuration of the flexible printed circuit boards occupies a large amount of space in the cabinet 2 and has a disadvantage that the space utilization efficiency deteriorates. Further, the shape of the flexible printed substrate 10 is complicated,
The manufacturing cost of the mold is high. Further, the presence of the crank-shaped folded portion 10c increases the length of the signal line, and there is also a problem that noise is likely to be applied to a signal passing through the signal line.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and can reduce the space occupied by a flexible printed board, minimize the signal line length, and facilitate the manufacture of the flexible printed board. Accordingly, it is an object of the present invention to provide a disk reproducing apparatus capable of reducing the manufacturing cost of a mold and the cost of a flexible printed substrate itself.

[0008]

In order to achieve the above object, a disk reproducing apparatus according to the present invention comprises a movable body having a mechanism for driving and reproducing a disk, and a housing capable of accommodating the movable body. A transport mechanism for moving the movable body into and out of the housing, a first circuit board mounted on the movable body, a second circuit board mounted on the housing, and the first circuit In a disc reproducing apparatus having a flexible printed board for electrically connecting a board and the second circuit board, the flexible printed board is a band-shaped fixed portion fixed to the housing; And a loop-shaped free portion that absorbs a change in the distance between the first circuit board and the second circuit board due to the transfer of the first circuit board and the second circuit board. This And a folded portion that connects al, and characterized in that said free portion in the vicinity of the folded portion and the fixed portion is formed by bonding together.

Further, the disk reproducing apparatus of the present invention has a movable body having a mechanism for driving and reproducing a disk, a housing capable of accommodating the movable body, and moving the movable body into and out of the housing. Transfer mechanism, a first circuit board mounted on the movable body, a second circuit board mounted on the housing, and electrically connecting the first circuit board and the second circuit board. A flexible printed substrate having a flexible printed circuit board connected to the flexible printed circuit board, wherein the flexible printed circuit board has a band-shaped fixing portion fixed to the housing; A loop-shaped free portion that absorbs a variation in the distance between the second circuit boards, and a folded portion that connects the free portion and the fixed portion so that the free portion and the fixed portion form a straight band on a plane. The housing is characterized in that it has a claw portion for fixing the free portion in the vicinity of the folded portion to the fixed portion.

According to the present invention, the flexible printed circuit board for electrically connecting the movable body and the circuit boards of the housing is arranged in a straight band on the plane so that the wiring of the flexible printed circuit board in the housing is achieved. The proportion of space can be reduced,
Also, the signal line length can be shortened. In addition, since it is sufficient to prepare a strip having a fixed width as the flexible printed board, the manufacturing cost of the mold can be reduced, and the connection work of the flexible printed board can be further simplified. it can.
The surface of the loop-shaped free portion and the fixed portion in the vicinity of the folded portion are surface-bonded, so that the height of the bulge of the loop-shaped free portion can be reduced. As a result, when the movable body is taken in and out of the housing, the movable body can be removed. Of the flexible printed circuit board due to interference between the flexible printed circuit board and the flexible printed circuit board can be prevented.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a CD-ROM according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the internal structure of a ROM drive. As shown in FIG. 1, the CD-ROM drive includes a drawer 21 which is a movable body on which a disk drive / playback mechanism for driving and playing a disk (not shown) is mounted, and a cabinet 22 which can accommodate the drawer 21. It is composed of Although the cabinet 22 is composed of an upper cabinet and a lower cabinet, illustration of the upper cabinet is omitted in FIG. The drawer 21 can be freely moved in and out of the cabinet 22 in directions indicated by arrows X1-X2.

The drawer 21 has a disk drive mechanism such as a disk motor (not shown) and a turntable 26, and irradiates a recording area of a rotating disk with a laser beam and takes in the reflected light so that data is read from the disk. An optical pickup (not shown) for reading and a pickup feed mechanism (not shown) for transporting the optical pickup in the radial direction of the disk are provided. The mechanism for driving the disk and the mechanism for supporting and transporting the optical pickup are as follows.
It is mounted on a single mechanical chassis, and this mechanical chassis is supported in a floating structure by a main body of the drawer 21 or the like via a vibration isolating member such as a damper rubber.

The drawer 21 and the cabinet 22
Inside, circuit boards 31 and 29 are provided, respectively. A motor board 31 which is a circuit board on the drawer 21 side is connected to a disk motor, a drive circuit for the disk motor, and a flexible printed board 30 which is electrically connected to a main board 29 which is a circuit board on the cabinet 22 side. Connector 34 and the like are mounted. On the other hand, a main board 29 on the cabinet 22 side includes a microcomputer and a memory for controlling a CD-ROM drive, and a flexible printed board 30 for electrically connecting to a motor board 31 on the drawer 21 side. A connector 37 and the like are mounted.

As the flexible printed board 30 connected between the connectors 34 and 37 of the main board 29 and the motor board 31, a flexible printed board formed in a single band (having a constant width) is used. Have been. FIG. 2 shows this flexible printed circuit board 30.
The details are shown below. This flexible printed board 3
Reference numeral 0 denotes a loop-shaped free portion 30a for absorbing a change in the distance between each of the substrates 31 and 29 due to the insertion and removal of the drawer 21 with respect to the cabinet 22, and a fixed portion 30b adhesively fixed to the bottom plate surface of the cabinet 22 (shaded lines in FIG. (Filled portion). The loop-shaped free portion 30a and the fixed portion 30b are connected through a folded portion 30c, and the loop-shaped free portion 30a and the fixed portion 30b are bonded to each other by an adhesive in the folded portion 30c so that the surfaces thereof are exactly overlapped. Thus, the arrangement of the flexible printed circuit board 30 on a plane is a straight band.

FIG. 3A and FIG.
The situation when the drawer 21 is accommodated inside is shown. As shown in FIG. 3A, the drawer 21 is inserted into the cabinet 22.
Is stored, the flexible printed circuit board 3
Although the loop-shaped free portion 30a is in contact with the drawer 21, the loop-shaped free portion 30a and the fixed portion 30b near the turn-back portion 30c are surface-bonded to each other. The height h of the bulge can be suppressed. FIG. 4 shows a loop-shaped free portion 30 near the folded portion 30c for comparison with the present embodiment.
3A shows the shape of the loop-shaped free portion 30a when the fixed portion 30a and the fixed portion 30b are not bonded to each other. As can be seen by comparing FIGS. 3 and 4, if the loop-shaped free portion 30a and the fixing portion 30b near the folded portion 30c are not surface-bonded, the height h of the bulge of the loop-shaped free portion 30a is high. That is, interference with the drawer 21 increases to increase the probability of damaging the flexible printed circuit board 30. However, in the present embodiment, such an accident of damage to the flexible printed circuit board 30 does not occur.

As described above, according to the present embodiment, each circuit board 3 of the drawer 21 and the cabinet 22
By arranging the flexible printed circuit board 30 that electrically connects the first and the second 29 to each other in a flat band shape, the proportion of the wiring space of the flexible printed circuit board 30 in the cabinet 22 can be reduced. In addition, the signal line length can be shortened. Further, since a flexible (printed) substrate having a band shape (having a constant width) may be prepared, the manufacturing cost of the mold and the cost of the flexible printed substrate itself can be reduced. Connection work can also be simplified.

Further, since the loop-shaped free portion 30a and the fixed portion 30b near the folded portion 30c are surface-bonded, the height h of the bulge of the loop-shaped free portion 30a can be reduced. 21 cabinets 2
In taking in and out of the flexible printed circuit board 2, damage to the flexible printed circuit board 30 due to interference between the drawer 21 and the flexible printed circuit board 30 can be prevented.

In the above-described embodiment, the loop-shaped free portion 30a and the fixed portion 30b near the folded portion are surface-bonded to each other with an adhesive, but the claw portion 41 is attached to the bottom plate of the cabinet 22 as shown in FIG. The claw portion 41 is provided so as to protrude, and by holding both sides of the loop-shaped free portion 30a at a position separated by a predetermined distance from the folded portion 30c of the flexible printed board 30, the loop-shaped free portion near the folded portion 30c is held. Part 30a and fixed part 30
It is possible to realize a configuration equivalent to the case where b is surface-bonded.

Further, in the present embodiment, the case where the present invention is applied to a CD-ROM drive has been described.
The present invention can be applied to a VD drive and various types of writable disc reproducing devices.

[0021]

As described above, according to the disk reproducing apparatus of the present invention, the arrangement of the flexible printed circuit board for electrically connecting the circuit boards of the movable body and the housing to each other is a straight band. By doing so, the ratio occupied by the wiring space of the flexible printed board in the housing can be reduced, and the signal line length can be shortened. In addition, since it is sufficient to prepare a strip having a fixed width as the flexible printed board, it is possible to reduce the manufacturing cost of the mold and the cost of the flexible printed board itself, and also to connect the flexible printed board. It can be simpler than before. The surface of the loop-shaped free portion and the fixed portion in the vicinity of the folded portion are surface bonded, so that the height of the bulge of the loop-shaped free portion can be reduced. Of the flexible printed circuit board due to interference between the flexible printed circuit board and the flexible printed circuit board can be prevented.

[Brief description of the drawings]

FIG. 1 shows a CD-RO according to an embodiment to which the present invention is applied.
FIG. 2 is a perspective view illustrating a configuration of an M drive.

FIG. 2 is a perspective view showing details of a flexible printed board used in the CD-ROM drive of FIG. 1;

FIG. 3 is a side view showing a state in which a drawer is housed in a cabinet in the CD-ROM drive of the embodiment.

FIG. 4 is a side view showing the structure of a CD-ROM drive as a comparative example with respect to FIG.

FIG. 5 is a perspective view illustrating a configuration of a CD-ROM drive according to another embodiment.

FIG. 6 is a perspective view showing a configuration of a conventional CD-ROM drive.

[Explanation of symbols]

Reference Signs List 21 Drawer 22 Cabinet 29 Main substrate 30 Flexible printed substrate 30a Flexible free printed substrate loop-shaped free portion 30b Flexible printed substrate adhesive fixing portion 30c Flexible printed substrate folded portion 31 Motor substrate 41 Claw portion

Claims (2)

[Claims] 1. A movable body having a mechanism for driving and reproducing a disk, a housing capable of housing the movable body, a transport mechanism for moving the movable body into and out of the housing, and the movable body. A first circuit board mounted on the housing, a second circuit board mounted on the housing, a flexible printed board for electrically connecting the first circuit board and the second circuit board, Wherein the flexible printed board is a belt-shaped fixing portion fixed to the housing, and a distance between the first circuit board and the second circuit board accompanying the transfer of the movable body. A free portion having a loop shape that absorbs the fluctuation of the free portion, and a folded portion connecting the free portion and the fixed portion such that the free portion and the fixed portion form a straight band on a plane, and the free portion near the folded portion is provided. Disk reproducing apparatus, characterized in that part and the fixed part and is formed by bonding together. 2. A movable body having a mechanism for driving and reproducing a disk, a housing capable of accommodating the movable body, a transport mechanism for moving the movable body into and out of the housing, and the movable body. A first circuit board mounted on the housing, a second circuit board mounted on the housing, a flexible printed board for electrically connecting the first circuit board and the second circuit board, Wherein the flexible printed board is a belt-shaped fixing portion fixed to the housing, and a distance between the first circuit board and the second circuit board accompanying the transfer of the movable body. A loop-shaped free portion that absorbs fluctuations of the free portion, and a folded portion that connects the free portion and the fixed portion so as to form a straight band on a plane, and the housing includes:
A disc reproducing apparatus, comprising: a claw portion for fixing the free portion near the turning portion to the fixing portion.