JPH0562080U - Flexible wiring board fixed structure - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a structure for fixing a flexible wiring board, one end of which is connected to a movable part, to easily and securely fix the flexible wiring board to a chassis. [Structure] Movable part 1 moving on pickup chassis 2
One end of the flexible wiring board 8 is connected to the (optical pickup). A fixed member 9 (a stainless steel pressing plate) is attached to the pickup chassis 2, and a part of the flexible wiring board 8 (the bent portion 8a) is fixed to the pickup chassis 2 by a part of the fixed member 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fixing structure for a flexible wiring board, and more particularly to a fixing structure for a flexible wiring board whose one end is connected to a movable portion.

[0002]

[Prior Art]

 As a conventional fixing structure for a flexible wiring board, there is, for example, one shown in FIGS. 3 (A) and 3 (B). 1A is a bottom view of the pickup chassis for the optical disc device, and FIG. 1B is a vertical cross-sectional view of the pickup chassis.

In both figures, 1 is an optical pickup, 2 is a pickup chassis, 3 is a disk drive motor, and 4 is a pickup drive motor. The optical pickup 1 moves in the X direction while being guided by the guide shaft 5 and the lead screw 6 on both sides. The rotational driving force of the motor 4 is transmitted to the lead screen 6 engaged with a part of the optical pickup 1 via the reduction mechanism 7, and the optical pickup 1 is driven according to the rotation amount of the lead screw 6.

A laser diode, an actuator for an objective lens, and the like are housed inside the optical pickup 1, and a flexible wiring board 8 is connected to a side surface of the optical pickup 1 to supply signals for driving and controlling these. Has been done.

The flexible wiring board 8 is drawn from the side of the pickup chassis 2 into the chassis flat portion 2 a and is bent so as to extend in the X direction. Further, the tip of the flexible wiring board 8 is folded back in a U shape so as not to hinder the movement of the optical pickup 1, and is connected to the connecting portion 1a of the optical pickup 1.

Reference numeral 13 is a rectangular double-sided adhesive tape, by which the lower surface of the central portion of the flexible wiring board 8 arranged on the chassis plane portion 2a is fixed to the chassis plane portion 2a.

[0007]

[Problems to be solved by the device]

 However, in the above-mentioned conventional fixed structure of the flexible wiring board, there is a risk that the flexible wiring board 8 is caught by the optical pickup 1 when the optical pickup 1 moves to the inner peripheral portion of the disk, and the disk cannot be searched in the radial direction.

That is, since the flexible wiring board 8 is fixed to the chassis flat surface portion 2a only by the adhesive force of the double-sided adhesive tape 13, the optical pickup 1 moves to the inner peripheral portion of the disk, and the flexible wiring board 8 moves to the drawing. 3 (B) When positioned as indicated by the broken line in FIG. 3 (B), the elastic force exerted on the flexible wiring board 8 causes an upward stress in the drawing to cause the double-sided adhesive tape 13 to peel off from the flexible wiring board 8 or the chassis flat portion 2a. There were times when it ended up.

In view of the above points, the present invention provides a flexible wiring board fixing structure in which the flexible wiring board can be easily and surely fixed even when the optical pickup moves, and does not hinder the movement of the optical pickup. The purpose is to provide.

[0010]

[Means for Solving the Problems]

 The above problem can be solved by configuring as follows.

That is, a movable part that moves on the chassis, a flexible wiring board whose one end is connected to the movable part, and a fixing member attached to the chassis are provided, and a part of the flexible wiring board is fixed by the fixing member. It is configured to be fixed to the chassis.

[0012]

[Action]

 According to the present invention having the above structure, even if the movable part moves on the chassis, a part of the flexible wiring board whose one end is connected to the movable part is fixed by the fixing member attached to the chassis. To do.

[0013]

【Example】

 FIG. 1 (A) is a bottom view of an embodiment of the present invention, and FIG. 1 (B) is a vertical cross-sectional view of an essential part of the embodiment of the present invention. In both figures, the same components as those in FIGS. 3A to 3B are designated by the same reference numerals, and the description thereof will be omitted.

In both figures, 9 is a substantially rectangular metal pressing plate (fixing member) made of a rigid stainless steel plate or the like, which is mounted on the chassis plane portion 2a (chassis) so that its longitudinal direction extends in the X direction. It is arranged. That is, the adhesive portion on the upper surface of the double-sided adhesive tape 10 is adhered to the lower surface of the pressing plate 9, and the bent portion 8a at the center of the flexible wiring board 8 is attached to the adhesive portion on the left side of the lower surface of the double-sided adhesive tape 10. The chassis flat surface portion 2a is attached to the adhesive portion on the right half. In this manner, the bent portion 8a at the center of the flexible wiring board 8 is fixed to the chassis flat portion 2a via the pressing plate 9 and the double-sided adhesive tape 10.

According to the above flexible wiring board fixing structure, the area of the adhesive surface of the double-sided adhesive tape is larger than that of the conventional structure, and the pressing plate 9 is made of a stainless plate having high rigidity. Therefore, the optical pickup 1 which is a movable portion moves to the inner peripheral portion of the disk (not shown), the flexible wiring board 8 is positioned as shown by the broken line in FIG. Even when a stress is applied upward and upward, the adhesive portion on the lower surface of the double-sided adhesive tape 10 does not come off from the chassis flat portion 2a.

Therefore, even if the optical pickup 1 moves in the X direction (radial direction of the disk) in the drawing, the flexible wiring board can be fixed easily and surely, and the movement thereof is not hindered by the optical pickup 1 being caught. It is possible to search tracks on the disk in the radial direction.

Further, the left end portion 9a of the pressing plate 9 is bent substantially vertically upward, and the optical pickup 1 moves to the inner peripheral portion of the disk so that a part of the flexible wiring board 8 contacts the left end portion 9a. The flexible wiring board 8 is configured so as not to be damaged even when it comes into contact with it.

Therefore, the coating of the flexible wiring board 8 is broken and the signal of the wiring portion is electrically short-circuited via the pressing plate 9, or the wiring portion is disconnected and the signal is not supplied and the optical pickup 1 is driven. There is no need to control.

The pressing plate 9 may be fixed to the flat surface portion 2a of the chassis by screwing instead of using the double-sided adhesive tape. The above effects can be obtained by a very simple and short-time operation.

FIG. 2 (A) is a bottom view of another embodiment of the present invention, and FIG. 2 (B) is a longitudinal sectional view of a main part of another embodiment of the present invention. In both figures, the same components as those in FIGS. 3A to 3B are designated by the same reference numerals, and the description thereof will be omitted.

In both figures, reference numeral 11 denotes a resin guide plate, and a guide portion 11a formed of a substantially rectangular flat plate having a longitudinal direction in the X direction and being substantially parallel to the flexible wiring board 8, and a guide. At the left end of the portion 11a, there is a mounting portion 11b formed perpendicular to the guide portion 11a. A screw hole (not shown) is provided in the mounting portion 11b, and the guide plate 11 is mounted on the side surface of the optical pickup 1 by a screw 12.

At this time, the guide plate 11 is arranged at a height such that the flexible wiring board 8 is interposed between the lower surface of the mounting portion 11b and the upper surface of the chassis flat portion 2a with a slight gap. ing.

According to this embodiment, when the optical pickup 1 moves in the X direction, the guide plate 11 moves together with the optical pickup 1 while keeping the gap between the optical pickup 1 and the upper surface of the chassis flat portion 2a substantially constant. Therefore, when the flexible wiring board 8 is elastically deformed and comes into contact with the lower surface of the guide portion 11a, the position in the height direction of the flexible wiring board 8 is guided so as not to be higher than the guide portion 11a. To be done.

Therefore, the optical pickup 1 can be moved without being partially caught by the flexible wiring board 8 deformed by the optical pickup 1, and the search can be performed in the radial direction of the disc.

In this embodiment, the position of the flexible wiring board 8 in the height direction is regulated by the guide plate 11 without fixing the flexible wiring board 8 to the chassis flat portion 2a to obtain the above effect. However, of course, like the conventional fixing structure, the guide plate 11 may be provided after being fixed to the chassis flat portion 2a by the double-sided adhesive tape. Further, the guide plate 11 of this embodiment is made of resin as long as it can guide the flexible wiring board 8 and does not require rigidity, but it is made of resin as long as it has a shape that does not damage the flexible wiring board 8.

[0026]

[Effect of the device]

 As described above, according to the present invention, even if the movable part moves on the chassis, part of the flexible wiring plate is fixed to the chassis by the fixing member, so that part of the flexible wiring plate is caught by the movable part. It has the feature that it does not hinder the movement of the movable parts.

[Brief description of drawings]

FIG. 1 is a two-view drawing of an embodiment of the present invention.

FIG. 2 is a two-view drawing of another embodiment of the present invention.

FIG. 3 is a two-sided view of an example of a conventional fixing structure for a flexible wiring board.

[Explanation of symbols]

 1 Optical pickup (movable part) 2 Pickup chassis (chassis) 2a Chassis flat part (chassis) 8 Flexible wiring board 9 Pressing plate (fixing member) 10 Double-sided adhesive tape

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Akio Kazu 2-6-27 Mizuhiki, Atsugi City, Kanagawa Prefecture MITSUMI Dormitory

Claims (2)

[Scope of utility model registration request] 1. A movable part moving on a chassis, a flexible wiring board having one end connected to the movable part, and a fixing member attached to the chassis, wherein a part of the flexible wiring board is provided. A fixing structure for a flexible wiring board, which is configured to be fixed to the chassis by a portion fixing member. 2. The flexible wiring according to claim 1, wherein the fixing member is attached to the other surface of a double-sided adhesive tape having one surface attached to a part of the chassis and the flexible wiring board. Board fixed structure.