JP2000251421A - Flexible wiring board connecting system in head device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a fiexible wiring board from being damaged owing to contact by drawing the fiexible wiring board out of the upper surface of a head device diagonally downward along a tapered part and making it difficult to bring the turning loop of the fiexibie wiring board into contact with the rear surface of a covering plate. SOLUTION: A tapered part 2a is formed in the corner of the upper surface of a head device 2 of which a flexibie wiring board 6 is drawn out, and the flexible wiring board 6 is drawn out of the upper surface of the head device 2 diagonally downward along the tapered part 2a. Thus, the turning loop 6a of the flexible wiring board 6 is made it difficult to bring the turning loop 6a of tThe flexble board 6 into contact with the rear surface of the covering plate 4a by arranging downward the position where the turning loop 6a of the flexible wiring board 6 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible wiring board used for transmitting and receiving electric signals between a head device used for reading and writing on a disk or the like and a circuit board fixed to the main body. The present invention relates to a flexible wiring board connection method for a head device, which shows a connection method on the head device side.

[0002]

2. Description of the Related Art There is known an information recording / reproducing apparatus for reading and / or writing a signal from / to a signal recording medium such as a disk by a head device such as an optical pickup.

In such an information recording / reproducing device,
Generally, a head device is supported so as to be movable in a direction crossing a signal track of a signal recording medium, and a flexible wiring board is used for transmitting and receiving electric signals between the head device and a circuit board fixed to the main body. Is used.

FIG. 2 shows a disk device as an example of an information recording / reproducing device in which a head device and a circuit board are connected by a flexible wiring board. In the disk device shown in FIG. 2, a turntable 1, a head device 2,
An assembly 4 is constructed by integrally assembling a head feed mechanism 3 for driving the head device 2 in the radial direction of the disk, and each of the flexible wiring boards 5, 6, 7 pulled out from the assembly 4 is Circuit board 8 fixed to main body
Are connected to the corresponding connectors 9, 10, 11 provided in the.

[0005]

The flexible wiring board 6 connected to the head device 2 is pulled out from the upper surface of the head device 2 as shown in FIG. Is connected to a circuit board 8 arranged below the first circuit board.

[0006] By pulling out the flexible wiring board 6 from the upper surface of the head device 2, the folded loop 6 a of the flexible wiring board 6 is hardly brought into contact with the back surface of the cover plate 4 a of the assembly 4, but the head device 2 is still folded back. When moved in a direction approaching the loop 6a, FIG.
As shown by the broken line, the folded loop 6a protrudes and comes into contact with the back surface of the covering plate 4a, and the flexible wiring board 6 is damaged by rubbing of the contact portion.

[0007] In particular, in order to meet the needs for thinning,
When the material used in the step (b) was changed from a synthetic resin to a stainless steel plate, damage due to friction at the contact portion of the folded loop 6a of the flexible wiring board 6 became remarkable from the viewpoint of the hardness of the material.

[0008]

According to the present invention, a flexible wiring board is pulled out from an upper surface of a head device, and a tapered portion is formed at a corner of an upper surface of the head device from which the flexible wiring board is drawn, and the tapered portion is formed along the tapered portion. The flexible wiring board is drawn out of the head device obliquely downward from the upper surface of the head device. With this arrangement, the position where the folded loop of the flexible wiring board is formed is disposed below, so that it is difficult to contact the back surface of the covering plate disposed above the head device so as to cover a part of the head device and the head feed mechanism. .

[0009]

FIG. 1 is an exploded perspective view of a main part of a disk device showing an embodiment of a flexible wiring board connection system of a head device according to the present invention. 1, the same parts as those shown in FIG. 2 are denoted by the same reference numerals.

The head device 2 includes a cover plate 4a of an assembly 4 to which the turntable 1 and the head feed mechanism 3 are attached.
The objective lens 12 is arranged below the slit 13 so as to be seen through the slit 13, and is supported so as to be slidable and displaceable by a screw shaft 14 rotatably driven by the coating plate 4a and a guide shaft 15 fixed to the coating plate 4a. And the screw shaft 14 is moved by the head feed mechanism 3.
Is rotated in the radial direction of the disk mounted on the turntable 1.

The flexible wiring board 6 is pulled out from the upper surface of the head device 2 in the sliding direction of the head device 2, and the flexible wiring board 6 is folded back so as to sandwich the head device 2 in the thickness direction. The plug portion 6b serving as a typical contact is connected to a circuit board (see FIG. 2).

At the corner of the upper surface of the head device 2 from which the flexible wiring board 6 is pulled out, a tapered portion 2a is formed as shown in FIG.
It is drawn obliquely downward from the upper surface of the head device 2 along a.

For this reason, the position where the folded loop 6a of the flexible wiring board 6 is formed is
Is formed below the case where it is pulled out parallel to the upper surface of the head device 2, and when the head device 2 is slid and displaced and the return loop 6a projects upward, it comes into contact with the back surface of the covering plate 4a. It becomes difficult.

Further, the flexible wiring board 6 is pressed onto the upper surface of the head device 2 by the pressing plate 16 from above the flexible wiring board 6, but the pressing plate 16 is bent along the tapered portion 2a. The pressing plate 16 presses the flexible wiring board 6 along the tapered portion 2a.

Therefore, even if the head device 2 is slid and displaced, the direction in which the flexible wiring board 6 is pulled out from the head device 2 is kept constant, and the folded loop 6a of the flexible wiring board 6 comes into contact with the back surface of the covering plate 4a. The drawn-out state of the flexible wiring board 6 is maintained in a state where it is difficult to perform the operation.

[0016]

As described above, according to the present invention, since the flexible wiring board is drawn obliquely downward from the upper surface of the head device along the tapered portion, the folded loop of the flexible wiring board is covered with the covering plate. Of the flexible wiring board due to the contact can be prevented.

In this case, the holding plate for holding the flexible wiring board on the upper surface of the head device is formed in a bent shape along the tapered portion, whereby the flexible wiring board is held down along the tapered portion by the holding plate. Even when the device is displaced, the direction in which the flexible wiring board is pulled out of the head device is kept constant, and the position of the return loop of the flexible wiring board is extremely displaced by the sliding displacement of the head device, so that the return is caused. The loop can be prevented from coming into contact with the back surface of the covering plate.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a disk device showing one embodiment of a flexible wiring board connection system of a head device according to the present invention.

FIG. 2 shows a disk device as an example of an information recording / reproducing device in which a head device and a circuit board are connected by a flexible wiring board.

FIG. 3 is an explanatory diagram for explaining a flexible wiring board connection method of the head device according to the present invention.

FIG. 4 is an explanatory diagram for explaining a flexible wiring board connection method of a conventional head device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Head device 2a Taper part 4 Assembly 4a Covering plate 5, 6, 7 Flexible wiring board 6a Folded loop 8 Circuit board 16 Holding plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Chika Yoshinaga 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. F-term (reference) 5D068 AA02 BB01 CC03 EE17 GG30

Claims (2)

[Claims] 1. A flexible wiring board used for transmitting and receiving an electric signal between a head device movably supported in a direction crossing a signal track of a signal recording medium and a circuit board fixed to a main body side. A flexible wiring board connection method of a head device showing a connection method on the head device side, wherein the flexible wiring board is pulled out from the upper surface of the head device, and a taper portion is formed at a corner of the upper surface of the head device from which the flexible wiring board is pulled out. A flexible wiring board connection method for a head device, wherein the flexible wiring board is drawn out of the head device from the upper surface of the head device obliquely downward along the tapered portion. 2. A flexible wiring board is pressed onto an upper surface of a head device by a holding plate from above the flexible wiring board, and the holding plate is bent along the tapered portion, and the flexible wiring board is held by the holding plate. 2. The flexible wiring board connection method for a head device according to claim 1, wherein the pressing is performed along the tapered portion.