JP2658587B2 - Flexible wiring board mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible wiring mounting structure, and more particularly to a flexible wiring mounting structure in which a flexible wiring board connected to a connection terminal on a movable portion is fixed to the movable portion.

[0002]

2. Description of the Related Art For example, in a magneto-optical disk drive,
Recording and reproduction are performed by moving the optical head in the radial direction of the disk by a linear actuator. The linear actuator has a pair of rod-shaped cores provided on the chassis,
The coil comprises a coil fitted to a pair of rod-shaped cores, and a support base for supporting the coil and the optical head. Therefore, when the coil is energized, the optical head moves together with the support base due to the electromagnetic force. Since various signals are supplied from the control circuit to the optical head and the coil, each connection terminal on the support base side is connected to the control circuit via a flexible wiring board. Conventional flexible wiring board mounting structures for mounting this type of flexible wiring board on the movable side of an optical base or the like include the following.

After soldering the connection portion of the flexible wiring board to the connection terminal on the support base side, the flexible wiring board is adhered to the side wall of the support base with a double-sided adhesive tape or the like. After a hole for screw insertion is provided in the flexible wiring board and the connection portion of the flexible wiring board is soldered to the connection terminal on the support base side, the flexible wiring board is screwed to the side wall of the support base.

[0004]

However, in the conventional flexible wiring board mounting structure, the flexible wiring board cannot be removed from the support base at the time of maintenance or repair, for example. Care must be taken to prevent the adhesive from deteriorating due to the aging of the material and the deterioration of the adhesive due to the surrounding environment (temperature and humidity).
In addition, when the flexible wiring board is forcibly peeled off from the support base, the adhesive strength is weakened, and the flexible wiring board cannot be attached to the support base again.

In the conventional case, since a hole for inserting a screw into the flexible wiring board is provided, a space for providing a screw hole in addition to the connection terminal at the connection portion of the flexible wiring board is required. The part becomes large. In addition, when the screws are tightened, the flexible wiring board may be broken by the screw tightening force.
Also, the connection part of the flexible wiring board is soldered.
If you need to remove the screws, melt the solder and
The connection portion of the wiring board is separated. So an example
For example, when replacing the optical head, it is necessary to remove the screws.
Replacement work is troublesome and maintenance is poor.
Problems.

Accordingly, an object of the present invention is to provide a flexible wiring board which solves the above-mentioned problems by providing a holding plate for holding a connection portion of the flexible wiring board.

[0007]

According to the present invention, a connecting portion of a flexible wiring board is soldered to a connecting terminal of an optical head .
A moving unit in which the flexible wiring board is accommodated with an optical head
In the flexible wiring board mounting structure for mounting on a material, the flexible wiring board except for a connection portion of the flexible wiring board is provided.
The holding plate formed so as to abut the rear surface of the wiring board is
Fixed to the side surface of the moving member, and soldering the connection terminal
Avoid connecting the flexible wiring board to the holding plate
Comprising a configuration that holds between the side surface of the moving member
It is characterized by the following.

[0008]

According to the present invention, the holding plate is connected to the connection end of the optical head.
Avoid the soldering part of the connector
Frame between the holding plate and the side of the moving member.
Connect the connection part of the kibble wiring board to the connection terminal of the optical head
Of the moving member containing the holding plate and optical head
Flexible wiring board connection as it can be held between the sides
Part can be protected and retained when replacing the optical head.
After melting the soldered part without removing the board,
Pull the connection terminal of the board from between the holding plate and the side of the moving member.
The optical head can be easily removed.
it can.

[0009]

1 to 3 show one embodiment of a flexible wiring board mounting structure according to the present invention. In each figure, a disk device 1 is a magneto-optical disk device, and a turntable 3 on which a disk (disc-shaped recording medium) (not shown) is mounted on the upper surface of a chassis 2 is rotatably supported.
A linear actuator 5 for driving the optical head 4 in the disk radial direction (A and B directions) is provided at the rear of the optical head.

The linear actuator 5 includes a pair of rod-shaped cores 5a and 5b extending in the directions A and B, and the rod-shaped cores 5a and 5b.
b, and coils 5c, 5d fitted to
5d, and a supporting base (moving member) 5e on which the optical head 4 is mounted and fixed. When the coils 5c and 5d of the linear actuator 5 are energized, the electromagnetic force causes the support base 5e to operate together with the optical head 4 in the tracking direction (A and B directions).

The optical head 4 and the coils 5c and 5d are connected to a control circuit (not shown) via the flexible wiring board 6 to move in the A and B directions together with the support base 5e during recording and reproduction. This flexible wiring board 6
One end is inserted into the connector 7, and the other end 6b is held by the side wall 5f of the support base 5e.

Here, the mounting structure of the flexible wiring board 6 will be described. As shown in FIG. 1, the optical head 4 has an objective lens 4b at the center of the upper surface 4a, and has a pair of connection terminals 8, 9 on a side surface 4c in the B direction. The connection terminals 8 and 9 are formed by bending a flexible substrate into a U shape, and a plurality of electrodes are formed outside the connection terminals.

The support base 5e has, at the center, a storage section 10 into which the optical head 4 is inserted. On both sides of the storage section 10, holes 11 and 12 through which the rod-shaped cores 5a and 5b are inserted are A.
It penetrates in the B direction. A guide shaft 1 for guiding the movement of the support base 5e is provided on both sides of the support base 5e.
Rollers 15 to 17 slidably contacting the rollers 3 and 14 are rotatably supported, and a hole 5b is provided substantially at the center of the side wall 5f.

The optical head 4 is inserted into the housing 10 with the objective lens 4b facing upward, and is screwed to the support base 5e. At this time, the pair of connection terminals 8 and 9 are attached so as to straddle the upper end 5g of the side wall 5f of the support base 5e. As for the flexible wiring board 6, the holding plate 18 is
e, it is held between the holding plate 18 and the side wall 5f of the support base 5e. As shown in FIG. 4, the flexible wiring board 6 has an insertion part 6b inserted into the connector 7 at one end of an extension part 6a extending in the longitudinal direction, and a connection terminal 8 of the optical head part 4 at the other end. , 9 and terminals 6e, 6f soldered to the coils 5c, 5d. A hole 6g for inserting a mounting screw is provided at the base of the terminal 6e.

A reinforcing plate 19 made of glass epoxy resin or the like is adhered to the back of the insertion portion 6b. A reinforcing plate 20 (shown by hatching in FIG. 4) made of sheet metal is adhered to the other end of the flexible wiring board 6. The reinforcing plate 20 is a thin plate having a thickness of about 0.2 mm, and is provided with positioning projections 20a and 20b bent at 90 degrees at the upper end, and a positioning circular projection substantially at the center of the reinforcing plate 20. 20
c is protruding.

As shown in FIG. 5, the holding plate 18 has a contact surface 18a that contacts the back surface of the flexible wiring board 6, and a hook portion 18b that projects in an inverted U shape from the upper end of the contact surface 18a.
And an extension 18c bent approximately 90 degrees from the contact portion 18a and extending in the direction B, and a fixing portion 18d projecting horizontally from the upper end of the extension 18c.

The contact surface 18a of the holding plate 18 is an optical head
The terminals 6c and 6d to be soldered to the connection terminals 8 and 9 of FIG.
The connecting terminals 8 and 9 are
It is provided so as not to be pressed. Thus, the holding plate 1
8 avoids soldering portions of the connection terminals 8 and 9 of the optical head 4.
Connecting portions 6c and 6d of flexible wiring board 6
18 and the side wall 5f of the support base 5e.
To remove the holding plate 18 when replacing the optical head 4
Soldering part between connection terminals 8, 9 and connection parts 6c, 6d
Can dissolve the minute. As a result, the solder
After that, the connection terminals 8 and 9 of the optical head 4 are connected to the holding plate 18.
And between the side wall 5f of the support base 5e and the support base 5e.
As a result, the optical head 4 can be easily removed.

The extension 18c has a circular hooking projection 1.
The fixing portion 18d is provided with a hole 18f through which a mounting screw is inserted. Reference numeral 21 shown in FIG. 1 denotes a board retaining clip, which is formed by folding a thin spring steel material, and holds the flexible wiring board 6 on the holding plate 18 as described later. The clip 21 is provided with a hole 21a into which the projection 18e of the holding plate 18 fits.

Next, steps for assembling the flexible substrate structure having the above configuration will be described. First, the terminals 6c to 6f of the flexible wiring board 6 are soldered to the connection terminals 8, 9 and the coils 5e, 5d on the optical head 4 side. Next, the reinforcing plate 20 adhered to the wiring board 6 is brought into contact with the side wall 5f of the support base 5e.

The reinforcing plate 20 has a projection 20a, 20b abutting on the upper end 5g of the support base 5e, and a circular projection 20c fitted into the hole 5b of the side wall 5f.
And the side wall 5f
Is locked. Thus, the flexible wiring board 6 integrated with the reinforcing plate 20 is locked by the support base 5e and the hole 6g
Correspond to the screw holes 5i of the support base 5e.

Subsequently, the contact portion 18a of the holding plate 18 is brought into contact with the back surface of the flexible wiring board 6, and the holding portion 18b
To the side wall 5f of the support base 5e. Thereby, the other end side (the side having the terminals 6c and 6d) of the flexible substrate 6 is held between the holding plate 18 and the side wall 5f.
At the same time, the hole 18f of the fixing portion 18d matches the hole 6g of the flexible wiring board 6.

Here, the mounting screw 22 shown in FIG. 1 is inserted through the hole 18f of the holding plate 18 and the hole 6g of the flexible substrate 6, and screwed into the screw hole 5i of the support base 5e.
Connection of the optical head 4 by tightening the mounting screw 22
Terminal 6 of flexible wiring board 6 connected to terminals 8 and 9
The base of c and 6d is supported by the support base 5 by the holding plate 18.
e.

Since the mounting screw 22 does not directly contact the flexible wiring board 6, it is possible to prevent the hole 6g from being torn by the tightening torque. Thus, the holding plate 18
Is fixed to the support base 5e, the bases of the terminals 6c and 6d of the flexible wiring board 6 are held by the holding plate 18,
For example, even if an external force is applied, the peeling of the solder can be prevented, and the durability and reliability of the device can be improved. Then, the extending portion 6a of the flexible wiring board 6 comes into contact with the extending portion 18c of the holding plate 18, and the clip 21 is fitted from above. The clip 21 holds the extending portion 6a in close contact with the extending portion 18c, and the hole 21a is fitted and locked to the projection 18e.

As a result, the extending portion 6a of the flexible wiring board 6 is connected to the extending portion 18c extending in the direction B and the clip 21.
Is held so as to extend in the B direction. Thus, the flexible substrate 6 is guided so as not to prevent the movement of the support base 5e. Also, for maintenance and inspection, the flexible wiring board 6
May need to be removed. In this case, the flexible board 6 can be detached from the support base 5e by weakening the mounting screw 22, and maintenance work can be easily performed. After the maintenance and inspection, the holding plate 18 may be screwed to the support base 5e with the mounting screw 22 as described above.

In the above embodiment, a magneto-optical disk drive has been described as an example. However, the present invention is not limited to this.

[0026]

As described above , according to the present invention , the holding plate
Avoid soldering the connection terminals of the optical head
Between the holding plate and the side of the moving member.
To maintain the connection, connect the connection part of the flexible printed circuit board to the optical head.
The holding plate and the optical head remain
It can be held between the side of the moving member
In addition to protecting the connection of the shibble wiring board, the optical head
When replacing the soldering part without removing the holding plate.
After that, connect the connection terminal of the optical head to the holding plate and the moving member.
It is possible to pull out from between the side and the optical head
Can be easily removed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a flexible wiring board mounting structure according to the present invention.

FIG. 2 is a diagram illustrating a mounting structure of a flexible base and a support base in which an optical head is incorporated.

FIG. 3 is a plan view of the disk device.

FIG. 4 is a view for explaining a flexible board before mounting.

FIG. 5 is a diagram illustrating a configuration of a holding plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disk device 4 Optical head 5 Linear actuator 6 Flexible wiring board 7 Connector 8, 9 Connection terminal 10 Storage part 18 Holding plate 19, 20 Reinforcement plate 21 Clip

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhito Sakoda 8-1-1, Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Inside the Mitsubishi Electric Corporation Industrial Systems Research Institute (72) Inventor Hidemitsu Fujisawa 8-chome Honcho Tsukaguchi, Amagasaki City, Hyogo Prefecture No. 1 Mitsubishi Electric Corporation Industrial Systems Research Laboratory (72) Hiroo Shibe 8-1-1 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Mitsubishi Electric Corporation Industrial Systems Research Laboratory (72) Inventor Masayuki Suzuki Nakamachi, Musashino City, Tokyo 3-7-3 TEAC Corporation (72) Inventor Yasushi Noda 3-7-3 Nakamachi, Musashino City, Tokyo Inside TEAC Corporation (72) Inventor Keiji Uehara 3-7-7 Nakamachi, Musashino City, Tokyo No. 3 TEAC Corporation (72) Inventor Katsuya Enami 3-7-3 Nakamachi, Musashino City, Tokyo Iakku within Co., Ltd. (56) references JitsuHiraku Akira 51-128250 (JP, U) JitsuHiraku Akira 59-111063 (JP, U) JitsuHiraku flat 2-68485 (JP, U)

Claims (1)

(57) [Claims] 1. A connecting portion of the flexible wiring board and soldered to the connection terminals of the optical head, the light of the flexible wiring board
A flexible wiring board mounting structure for mounting to a moving member in which a dynamic head is housed , wherein the flexible part excluding a connection part of the flexible wiring board is provided.
The holding plate formed so as to contact the back of the wiring board.
Fixed to the side surface of the moving member, and
Hold the connection part of the flexible printed circuit board while avoiding
A flexible wiring board mounting structure, characterized in that it is configured to be held between a board and a side surface of the moving member .