JPH0944882A - Wiring structure for optical pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth the moving operation of an optical pickup by arranging and wiring a flexible printed circuit board from a connector provided on the bottom part of the optical pickup onto the side surface of a chassis without projecting wiring material from the upper/lower surfaces of the optical pickup and wiring from the connector to an external main printed circuit board with a junction wiring member. SOLUTION: This optical pickup is provided with a concave attaching part 10a provided on the bottom part of the optical pickup, the connector 11 attached to the concave attaching part 10a, a hook 16a provided on the side surface of an actuator cover 16 and holding the flexible printed circuit board 12 therebetween and the junction wiring member 17 connecting between the connector 11 and the external main printed circuit board. Then, the flexible printed circuit board 12 is arranged and wired on the side surface of the chassis 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup for an optical disc player, and more particularly to an optical pickup wiring structure suitable for wiring the inside of the optical pickup using a connector and a flexible printed circuit board. .

[0002]

2. Description of the Related Art Conventionally, an optical pickup for reading information recorded on a recording medium, for example, an optical pickup for reading a CD-ROM, performs focus control or tracking control of light from a laser light generating means through an objective lens to obtain an optical disc. The recorded information was reproduced by accurately focusing on the reproduction position. Generally, a flexible printed circuit board is used for electrical connection between the device main body and the coil or the light emitting / receiving element mounted on such an optical pickup.
This flexible printed circuit board is extended to the outside and pulled out to be electrically connected to the apparatus main body.

[0003]

However, the conventional wiring structure of the optical pickup described above has a drawback that the wiring work is difficult and the cost is high.

The present invention has been made in view of the above points, and the object thereof is to solve the drawbacks of the conventional example, to provide a connector under the chassis of an optical pickup, and to perform internal wiring from this connector. A printed circuit board is arranged on the side surface of the optical pickup and wired,
Another object of the present invention is to provide a wiring structure for an optical pickup configured to connect the connector to the external main printed board with a relay wiring member.

[0005]

The wiring structure of the optical pickup according to the present invention is such that, in an optical pickup for reading information optically recorded on a recording medium, at least a part of the wiring structure is along the outer surface of the chassis of the optical pickup. A flexible circuit board and a connector that is attached to a concave mounting portion provided on the lower surface of the chassis and connects the flexible circuit board and a relay wiring member for external connection, and is arranged along the chassis outer surface of the flexible circuit board. An actuator cover that holds the portion by a hook is provided. Further, in the wiring structure of the optical pickup having the above-mentioned configuration, the connector is attached to the recess attachment portion by screwing from below.

[0006]

According to the present invention, the concave mounting portion is provided on the bottom of the chassis of the optical pickup, and the connector is mounted to the concave mounting portion with screws or the like, and the electronic parts are mounted at predetermined positions on the flexible printed circuit board. Further, a power supply or an input / output signal is supplied to the focus coil, the tracking coil, and the light emitting / receiving element that constitute the optical pickup via the flexible printed circuit board. The flexible printed circuit board is arranged and wired from the connector to the side surface of the optical pickup, and is clamped and fixed on the side surface of the optical pickup by a hook provided on the actuator cover. The optical pickup thus wired is connected from the connector to the external main printed board by a relay wiring member.

That is, when the optical pickup is moved at a high speed in the radial direction of the optical disc in order to search or access the recorded information of the optical disc, the wiring of the optical pickup is located on the side surface, so the movement of the optical pickup is performed by the wiring material. Can be performed smoothly without being caught by other electronic members or mechanical members.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the wiring structure of an optical pickup according to the present invention will be described with reference to FIGS. 1 is a perspective view showing a state where an actuator cover of a wiring structure of an optical pickup is opened, FIG. 2 is a plan view of the optical pickup, and FIG. 3 is a side view. In the figure, 1 is an objective lens, 2 is a focusing coil, 3 is a tracking coil, 4 is a focusing magnet, 5 is a tracking magnet, 6 is a focusing yoke plate to which the focusing magnet 4 is attached, and 7 is tracking. Is a tracking yoke plate to which a focusing magnet 5 is attached. The focusing yoke plate 6, the focusing coil 2, and the focusing magnet 4 form a magnetic circuit in the focusing direction,
Further, the tracking yoke plate 7, the tracking coil 3, and the tracking magnet 5 form a magnetic circuit in the tracking direction. 8 is a suspension spring that supports the objective lens 1, 9 is a base plate to which the suspension spring 8 is fixed, and the objective lens 1 is supported from the base plate 9 by the suspension spring 8 so as to be able to move vertically and horizontally. The movement can be controlled in the focus direction and the tracking direction by the magnetic circuit.

Reference numeral 10 denotes a chassis to which a base plate 9 for supporting the objective lens 1 is fixed by screwing and fixed, and a concave mounting portion 10a which is recessed by the thickness of the connector 11 is provided at the bottom of the chassis 10. The connector 11 is mounted by connecting and wiring the flexible printed circuit board 12 to the concave mounting portion 10a with screws. The flexible printed circuit board 12 is bent and mounted on a side surface of the chassis 10 by a predetermined mounting body as shown in the figure, and an electronic component 13 and a laser light emitting / receiving element 14 are mounted at predetermined positions. Wiring is attached. Also,
The flexible printed circuit board 12 is wired so that a supply current is sent from the relay terminal 15 on the side surface to the focus coil 2 and the tracking coil 3 to perform a fine movement operation of the objective lens 1.

An actuator cover 16 is covered on these optical pickup bodies, and a hook 16a provided on the actuator cover 16 and the actuator cover 1 are covered.
The flexible printed circuit board 12 is held between the side surface of the optical pickup body 6 and the side surface of the optical pickup body 6, and is fixed to the side surface of the optical pickup body. In this way, the flexible printed circuit board 12 fixed to the side surface of the chassis 10 is a relay wiring member 1 that can be flexibly bent through the connector 11.
7 is wired to an external main print board 18.

As described above, power is supplied to the optical pickup from the connector 11 provided at the bottom of the chassis 10 through the flexible printed circuit board 12, and moreover,
This flexible printed circuit board 12 is a chassis 10
The wiring material does not protrude from the bottom surface or the top surface of the chassis 10 by being wired in a relatively large space on the side surface of the chassis, that is, a space in the direction in which the optical pickup slides. That is, when the optical pickup is slid in the radial direction of the optical disc to search the recorded information at a high speed or access the recorded information, it is possible to prevent the sliding operation of the optical pickup from being obstructed. it can.

[0012]

As described above, in the wiring structure of the optical pickup according to the present invention, the concave mounting portion is provided on the bottom surface of the chassis, and the connecting connector is screwed to the concave mounting portion. The connector does not protrude from the bottom surface of the chassis, and the flexible printed circuit board is placed on the side surface of the chassis for wiring, and is fixed by the hook of the actuator cover. Or, it does not protrude from the upper surface. The optical pickup thus wired prevents the trouble such as the wiring material from abutting and being caught by other electrical parts and mechanical parts arranged near the top and bottom of the optical pickup when the optical disk is slid in the radial direction. The effect is that you can.

Further, various wirings of the optical pickup, which are required to be miniaturized and reduced in weight, are constructed by using a connector and a flexible printed circuit board, and the connector can be easily attached by screwing from the lower part of the chassis. Since the flexible printed circuit board can be arranged so as to be fixed to a predetermined portion on the side surface of the chassis, the man-hours required for manufacturing and assembling the optical pickup can be reduced and the cost can be reduced. Moreover, it has excellent features such as a simple structure, the wiring of the optical pickup can be compactly assembled, and the structure can be constructed at low cost, so that it is easy to implement.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which an actuator cover is opened in an embodiment of a wiring structure of an optical pickup according to the present invention.

FIG. 2 is a plan view of the optical pickup of FIG.

FIG. 3 is a side view showing a relay wiring member from the optical pickup of FIG.

[Explanation of symbols]

 1 Objective Lens 2 Focus Coil 3 Tracking Coil 4 Focusing Magnet 8 Suspension Spring 9 Base Plate 10 Chassis 11 Connector 12 Flexible Printed Circuit Board 13 Electronic Component 14 Light Emitting / Receiving Element 15 Relay Terminal 16 Actuator Cover 17 Relay Wiring Member 18 Main Print Board

Claims (2)

[Claims] 1. An optical pickup for reading information optically recorded on a recording medium, a flexible circuit board having at least a part thereof along an outer surface of a chassis of the optical pickup, and a recess provided on a lower surface of the chassis. A connector for connecting the flexible circuit board to the relay wiring member for external connection, and an actuator cover for holding a portion of the flexible circuit board along the chassis outer surface with a hook. Wiring structure for optical pickups. 2. The mounting of the connector to the recess mounting portion comprises:
2. The wiring structure for an optical pickup according to claim 1, wherein a screw is fixed from below.