JPH10134412A - Pickup device for recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the thickness of a pickup device thin by arranging an RF substrate to the rear of a pickup chassis adjacent thereto within the range of the width of this pickup chassis in the axial direction of a disk. SOLUTION: A pickup 3 is supported by the pickup chassis 1 so as movable along guide shafts 6, 7 in the radial direction of the disk supported with a turntable 2. At the rear of this chassis 1, the RF substrate (printed circuit board) 11 is arranged adjacent to the chassis 1 within the range of the width in the axial direction of the disk, then this RF substrate 11 and the pickup 3 are electrically connected by an FPC(flexible printed circuit board) 8. The FPC 8 is guided so as to approach to the disk surface by a rear wall 10 of an opening part fixed on the chassis 1 and guided so as to keep a distance from the disk surface by a front wall 9 of the opening part, in such a manner that the FPC 8 is not brought into contact with the disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a CD player,
The present invention relates to a pickup device in a recording or reproducing apparatus for a disc such as a CD-R0M drive, a DVD drive, or an MD.

[0002]

2. Description of the Related Art Generally, a pickup apparatus shown in FIGS. 6 to 10 is known as a pickup apparatus for a recording or reproducing apparatus of this kind. 6 to 10 are intended to explain the positional relationship between an optical pickup and an RF board (printed board) that supplies a signal to the optical pickup or receives a signal from the optical pickup.

In FIG. 6, an RF board 11 is arranged on the lower surface of a pickup chassis 1 having an optical pickup 3, and an FPC (flexible printed board) 8 coming out of the pickup 3 is curved downward in an arc shape by gravity. ,
It is connected to a connector 12 fixed to the RF board 11. As shown in FIGS. 7 and 8, since the FPC 8 is very flexible, the pickup 3 can be moved between the inner circumference and the outer circumference of the disc 13 without imposing an unnecessary load from the FPC 8. I have.

[0004] In the pickup device constructed as described above, since the RF board 11 is arranged below the pickup chassis 1, there is a drawback that adjustment during assembly and service is difficult. Since the pickup 3 is disposed on the pickup 11, noise from the RF substrate 11 easily jumps into the pickup 3, and there is a disadvantage that a shield may be required as a countermeasure. Further, since the RF substrate 11 is disposed below the pickup chassis 1, the thickness of the pickup device is increased, and as a result, the thickness of the recording or reproducing device is increased.

Conventionally, of the above-mentioned drawbacks, the drawbacks that adjustment during assembly and service is difficult and that noise from the RF board 11 easily jumps into the pickup 3 are eliminated as shown in FIGS. 9 and 10. As shown,
It is also known that an RF board (printed board) 11 is disposed below the pickup chassis 1 in a moving direction of the pickup 3 and on a side far from the center of the disk 13. This is the same as that of FIG. 6 in that the pickup 3 is positioned on the lower surface side of the disk 13 by the pickup chassis 1 and is supported so as to be movable in the radial direction of the disk 13. RF
F for electrically connecting the substrate 11 and the pickup 3
CP (flexible printed board) 8.

An FPC upper surface bending preventing component (guide) 15 for guiding the FCP 8 is provided on the main body of the recording or reproducing apparatus, and when the pickup 3 moves to the outer periphery of the disk 13, the FPC 8 is bent upward with respect to the pickup 3. Thus, it is prevented from coming into contact with the disk 13. For this reason, F which was not required in the one in FIG.
The PC top surface bending prevention component 15 is required, and the thickness of the pickup device is increased as shown in FIG.
6, the length of the FPC 8 is longer than that of FIG. 6, and the amount of noise jumping into the pickup 3 increases.

[0007]

As described above, there has been no conventional pickup device whose thickness is sufficiently reduced. The present invention has been made in view of the above, and it is possible to reduce the thickness of a pickup device of a recording or reproducing apparatus that records a signal on a disk 13 or reproduces a signal from the disk 13. It is an object of the present invention to provide a low-cost pickup device that can reduce the thickness of the entire recording or reproducing device.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the above object, a pickup device of the present invention records a signal on a disk or reproduces a signal from a disk, or records or reproduces the signal. A pickup, a pickup chassis for supporting the pickup movably in a radial direction of the disc, and a pickup distant from the center of the disc in a movement direction of the pickup and a center of the disc. And a flexible printed board for electrically connecting the printed board and the pickup,

The printed circuit board is disposed adjacent to the chassis within an axial width of the disk of the chassis and is fixed to the chassis so that the flexible printed board does not contact the disk. A guide for guiding the flexible printed board, the guide comprising a first guide member for guiding the flexible printed board closer to the surface of the disk, and a first guide for guiding the flexible printed board. A second guide member that guides the member away from the plate surface of the disk on a side farther from the printed circuit board.

[0010] The guide is provided on a portion of the chassis farther from the center of the disk at an appropriate interval so as to penetrate an imaginary straight line along the moving direction of the pickup. A wall farther from the center of the disc as the first guide member, and a wall closer to the center of the disc as the second guide. May function as a guide member,

The pickup chassis may position the pickup on the lower surface side of the disk and support the pickup so as to be movable in the radial direction of the disk as described above.

The wall functioning as the first guide member is fixed to the pickup chassis only at one end in a direction intersecting the direction in which the pickup moves, and the other end of the wall is connected to the pickup chassis. A space may be provided between the two and the space may be such that the flexible printed board can be inserted.

[0013]

In the pickup device of the recording / reproducing apparatus of the present invention configured as described above, the printed circuit board is disposed adjacent to the chassis within a range of an axial width of the disk of the chassis. Therefore, the thickness of the pickup device can be reduced, and the guide fixed to the chassis includes a first guide member for guiding the flexible printed board so as to approach the disk surface, and the flexible printed board. And a second guide member for guiding the first guide member so as to be more distant from the plate surface of the disc than the printed circuit board, so that the flexible printed board contacts the disc. The flexible printed board is guided so as not to do so. And since the length of the flexible printed board can be shortened, the amount of noise jumping in can be reduced, and a pickup device with low cost can be obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a pickup chassis, which is a well-known optical pickup 3 for recording a signal on a disk to be described later with a laser beam or reproducing a signal from the disk with a laser beam.
It has. The pickup 3 is held by bearings 4 and 5 with respect to guide shafts 6 and 7 fixed to the pickup chassis 1, and is mounted on the disk by well-known means (not shown) in the axial direction of the guide shafts 6 and 7. It is slidable in the section from the inner circumference to the outer circumference. The pickup chassis 1 is provided with a turntable 2 which holds the disk and applies a predetermined rotation to the disk by a well-known spindle motor (not shown).

From the pickup 3, an FPC (flexible printed board) 8, which is a medium for signal transmission between the pickup 3 and an RF board (printed board) 11, is drawn out. Via a wall 9 and an opening rear wall 10, it is connected to a connector 12 fixed to an RF board 11 arranged behind the pickup chassis 1. Here, the relationship between the FPC 8 and the front wall 9 of the opening will be described with reference to FIG. In FIG. 2, a gap D is set between the front wall 9 of the opening and the rear wall 10 of the opening. Also, the lower end of the opening front wall 9 is set lower than the upper end of the opening rear wall 10 by H,
In addition, the height of the FPC 8 coming out of the pickup 3 is arranged to be equal to or higher than the upper end of the opening rear wall 10. With the configuration described above, in the section from the pickup 3 to the opening front wall 9, the FPC 8 is slightly bent downward but not upward in the pickup chassis 1 by the opening front wall 9.

FIG. 3 shows that the pickup 3 is
4 shows a state in which the pickup 3 is moving to the outer periphery of the disk 13. During this movement, the FPC 8 is bent by the amount of movement of the pickup 3 to the outer periphery.
Reference numeral 8 denotes the pickup chassis 1 by the opening front wall 9 described above.
, But downward without bending upward. FIG.
The pickup 3 further moves to the outer periphery, and the disk 13
2 shows a state in which the outermost periphery of is reached. Since the FPC 8 is bent downward at the time of FIG. 4 described above, even if the pickup 3 moves to the outermost periphery of the disk 13 as shown in FIG. I can't wait. Therefore, regardless of the position of the pickup 3, the FPC 8
Is bent downward with respect to the pickup chassis 1 and does not come into contact with the disk 13.

[0017]

As described above, the pickup device of the recording or reproducing apparatus according to the present invention has the pickup 3
A pickup chassis 1 for supporting the pickup 3 movably in the radial direction of the disc 13 along the guide shafts 6 and 7; and a center of the disc 13 in the movement direction of the pickup 3 in the chassis 1. RF board (printed board) located farther from, ie, behind
11 and an FPC (flexible printed board) 8 for electrically connecting the RF board 11 and the pickup 3, wherein the RF board 11 has an axial width of the chassis 1 on the disk 13. And is disposed adjacent to the chassis 1 within the range of
And a guide formed by an opening front wall 9 and an opening rear wall 10 for guiding the FPC 8 so that the FPC 8 does not contact the disc 13. A first guide member such as an opening rear wall 10 for guiding the plate closer to the plate surface; And a second guide member such as the front wall 9 of the opening for guiding.

As described above, by disposing the RF substrate 11 adjacent to the pickup chassis 1 and rearward of the chassis 1 within a range of the axial width of the disk 1 of the chassis 1, the pickup device is provided. The thickness, and thus the thickness of the recording / reproducing apparatus main body, can be reduced, and noise can be prevented from entering the pickup 3 from the RF substrate 11. And in addition to the above,
A first guide member such as an opening rear wall 10 that guides the FPC 8 closer to the plate surface of the disk 13, and the FPC 8 on the side farther than the RF substrate 11 with respect to the first guide member. Since the guide constituted by the second guide member such as the front wall 9 of the opening for guiding away from the plate surface of the FPC 13 is provided, the length of the FPC 8 can be reduced, and the pickup 3 moves. In this case, it is possible to prevent the FPC 8 from coming into contact with the disk 13 without using a special component, for example, the FPC upper surface bending preventing component 15 described in the conventional example.

The wall of the opening rear wall 10 or the like functioning as the first guide member is fixed to the pickup chassis 1 only at one end in a direction intersecting the direction in which the pickup moves. A space is provided between the other end of the unit and the pickup chassis 1, and this space allows the FPC 8 to be inserted therethrough.
After the FPC 8 is inserted into the space, the FPC 8 is moved between a wall portion such as the opening rear wall 10 and a wall portion such as the opening front wall 9 so that the FPC 8 is guided by these wall portions. The FPC 8 can be brought into contact, so that the operation of inserting the FPC 8 between the walls can be facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged schematic side view of a main part of FIG.

FIG. 3 is a schematic vertical sectional side view for explaining the operation of the device shown in FIG. 1;

4 is a schematic longitudinal sectional side view for explaining the operation of the device shown in FIG. 1 and showing an operation state different from that of FIG. 3;

5 is a schematic longitudinal sectional side view for explaining the operation of the device shown in FIG. 1 and showing an operation state different from that of FIG. 3 or FIG. 4;

FIG. 6 is a schematic exploded perspective view showing a conventional example.

FIG. 7 is a schematic vertical sectional side view for explaining the operation state of FIG. 6;

FIG. 8 is a schematic vertical sectional side view for explaining an operation state of FIG. 6 different from that of FIG. 7;

FIG. 9 is a schematic vertical sectional side view for explaining an operation state of a conventional example different from FIG. 6;

FIG. 10 is a schematic vertical sectional side view for explaining another operation state of FIG. 9;

[Explanation of symbols]

 Reference Signs List 1 pickup chassis 2 turntable 3 pickup 4,5 bearing 6,7 guide shaft 8 FPC (flexible printed board) 9 front wall of opening 10 rear wall of opening 11 RF board (printed board) 12 connector 13 disk 14 clamper

Claims (4)

[Claims] 1. A pickup device of a recording or reproducing device for recording a signal on a disk or reproducing a signal from the disk, comprising: a pickup; and a pickup for supporting the pickup so as to be movable in a radial direction of the disk. A chassis, and a printed circuit board arranged in a moving direction of the pickup of the chassis and on a side far from a center of the disk;
A flexible printed circuit board for electrically connecting the printed circuit board and the pickup, wherein the printed circuit board is disposed adjacent to the chassis within a range of an axial width of the disk of the chassis. A guide that is fixed to the chassis and guides the flexible printed board so that the flexible printed board does not come into contact with the disk; and the guide is configured to bring the flexible printed board closer to the surface of the disk. A first guide member for guiding, and a second guide member for guiding the flexible printed board so as to be farther from the plate surface of the disc than the printed circuit board with respect to the first guide member. A pick-up device for a recording or reproducing device. 2. The guide is provided on a portion of the chassis farther from the center of the disk at an appropriate interval so as to penetrate an imaginary straight line along a moving direction of the pickup. A wall farther from the center of the disc as the first guide member, and a wall closer to the center of the disc as the second guide. The pickup device of a recording or reproducing apparatus according to claim 1, wherein the pickup device functions as a guide member. 3. The pickup chassis according to claim 1, wherein the pickup chassis is positioned on the lower surface side of the disk and movably supports the pickup in the radial direction of the disk as described above. 3. The pickup device of the recording or reproducing device according to 2. 4. The wall functioning as the first guide member is fixed to the pickup chassis only at one end in a direction intersecting with the direction in which the pickup moves.
3. The recording or reproducing apparatus according to claim 2, wherein a space is provided between the other end of the wall and the pickup chassis, and the space allows the flexible printed board to be inserted therethrough. Pickup device.