JPH103759A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the optical disk device which is thin and small in size. SOLUTION: This device has a turntable 14, a spindle motor 15, a carriage 4, an FPC(flexible printed circuit) 12 and a guard ring 16. Then, the FPC 12 is arranged with its plane at right angles to a plane of an optical disk, and moreover the FPC 12 is arranged to be bent and extended in a space formed by the optical disk, the spindle motor 15 and the carriage 4 in accordance with movement of the carriage 4 in the radial direction. A recess 18 is provided in a part corresponding to a bending part of the FPC 12 out of the guard ring 16, so as to enable the the member of the FPC 12 to be bent and housed in the recess 18 when the FPC 12 is bent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device used for an optical video disk, a compact disk, a magneto-optical disk and the like.

[0002]

2. Description of the Related Art A conventional optical disk device will be described below. FIG. 6 is a configuration diagram of a conventional optical pickup. FIG. 7 shows a sectional view of FIG. 1 is a disk and 2 is an objective lens. Reference numeral 4 denotes a carriage, and the objective lens 2
And a laser unit 3 for reading disk data. Optical pickup is disk 1
It is necessary to read data from the inner circumference to the outer circumference. Therefore, the carriage 4 needs to move freely in the radial direction of the disk 1. A guide hole 5 is formed in the carriage 4 in the access direction to enable access movement, and a screw shaft 7 fixed to the base 6 and extending parallel to the radial direction of the disk 1 and a guide shaft 8 penetrate therethrough. I have. The screw shaft 7 has a screw shape and is engaged with the carriage 4. The screw shaft 7 is connected to a feed motor 9, and the carriage 4 is guided by the screw shaft 7 and the guide shaft 8 by the rotation of the feed motor 9,
The disk 1 can be moved smoothly in the radial direction.

The carriage 4 and the base 6 or the substrate 10 provided outside the carriage 4 and the pickup supply power to the driving means for the objective lens 2 and the laser unit 3 as described above, and transmit and receive signals. Wiring material 11
Connected by The wiring member 11 is usually connected by a flexible print circuit (hereinafter abbreviated as FPC) 12 so that the carriage 4 can move. FPC1
2 has a bending direction, and is disposed on the lower surface of the carriage 4 with the bending direction up and down.

[0004]

In recent years, there have been many demands for mounting a disk device on a notebook personal computer, and there has been an increasing demand for a smaller and thinner disk device. However, the conventional arrangement of the FPC 12 requires a height space 17 on the lower surface of the carriage 4 for drawing the FPC. FP
Since the C12 itself is thin, the height space 17 should not be so much necessary, but the height space 17 is necessary because it is easy to buckle or undulate. Therefore, it is effective to reduce the space 17 to reduce the thickness.

Further, in order to make the FPC 12 bend smoothly, a bend R is required at a bent portion. Usually, R of about 2 mm is required. Without this R, the bending resistance is several hundredths
The life of the device cannot be secured. For this reason, it is necessary to provide R outside the connecting portion of the carriage, which is a factor that the length in the disk radial direction cannot be shortened.

[0006] The present invention solves the above-mentioned problems of the prior art, and is compact and compact.
It is an object to provide a thin optical disk device.

[0007]

In the optical disk apparatus of the present invention, the plane of the planar wiring member is arranged so as to be perpendicular to the plane of the optical disk, and the optical disk, the spindle motor and the spindle motor are moved with the movement of the carriage in the radial direction. The flat wiring material is arranged so as to bend and extend in the space formed by the carriage, and a recessed bent portion is provided in a portion of the guard member corresponding to the portion where the flat wiring material is bent, and the flat wiring material is bent. At this time, the flat wiring member is arranged so as to be bent and stored in the recessed bent portion of the guard member.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk apparatus according to the present invention comprises a turntable for mounting an optical disk, a spindle motor for rotating the turntable, and emitting light to the optical disk to convert reflected light from the optical disk into an electric signal. Photoelectric conversion unit, a carriage mounted with the photoelectric conversion unit and movable in the radial direction of the optical disk, a bendable flat wiring member provided on the carriage for electrically connecting to the photoelectric conversion unit, and an outer periphery of the spindle motor And a guard member that protects and guides the planar wiring member at a portion facing the carriage, and arranges the plane of the planar wiring member so as to be perpendicular to the plane formed by the optical disc, so that the carriage can be moved in the radial direction. As a result, the flat wiring material bends and expands in the space formed by the optical disk, the spindle motor, and the carriage. And a recessed bent portion is provided in a portion of the guard member corresponding to the portion where the flat wiring material is bent, and the flat wiring material is bent and stored in the recessed bent portion of the guard member when the flat wiring material is bent. It is characterized by being arranged in such a manner.

According to the present invention, a thin and small optical disk device can be provided by the above configuration. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of an optical disk device according to an embodiment of the present invention, and FIG.
FIG. 1 is a disk and 2 is an objective lens. Reference numeral 4 denotes a carriage having a drive unit for the objective lens 2 and a laser unit 3 for reading data from the disk 1. Since the carriage 4 needs to read from the inner circumference to the outer circumference of the disk 1, it is necessary to freely move in the radial direction of the disk 1. A guide hole 5 is formed in the carriage 4 in the access direction to enable access movement, and is fixed to the base 6 so that the disc 1 can be moved.
The screw shaft 7 and the guide shaft 8 extending in parallel to the radial direction of the first through hole penetrate. Screw shaft 7
Is screw-shaped and meshes with the carriage 4. The screw shaft 7 is connected to a feed motor 9. The rotation of the feed motor 9 causes the carriage 4 to move the screw shaft 7 and the guide shaft 8.
And smoothly move in the radial direction of the disk 1.

The carriage 4 and the base 6 or the substrate 10 placed outside the carriage 4 and the pickup supply power to the above-mentioned driving means of the objective lens 2 and the laser unit 3 to exchange signals. Wiring material 11
Connected by The wiring members 11 are usually connected by a flexible print circuit (hereinafter abbreviated as FPC) 12 in which one or more sheets are stacked so that the carriage 4 can be moved. The FPC 12 is disposed so that the bending direction is perpendicular to the disk 1 so that the FPC 12 can be bent by the movement of the carriage 4. FPC12 is carriage at one end
The other end is fixed to the side surface of the block 13 fixed in the base 6. Also, FPC
The width of 12 is configured to be lower than the height up to the lower surface of the turntable 14.

A turntable 14 for mounting the disk 1 is pressed into a shaft of a surface-facing spindle motor 15. Surface-facing spindle motor 15 has base 6
It is installed in. Also, on the outer periphery of the spindle motor 15, the rotating portion of the motor and the FP
A guard ring 16 is provided as a guard member for preventing C12 from being worn by contact.

When the carriage 4 is on the outer peripheral side of the disk 1, the FPC 12 is open as shown in FIG. FIG. 2 is a configuration diagram of an optical disk device according to another embodiment of the present invention,
And FIG. 4 is a sectional view of FIG. As shown in FIGS. 2 and 4, the FPC 12 is folded between the carriage 4, the guard ring 16 and the turntable 14 when the FPC 12 is on the inner peripheral side. At this time, the bent portion is located in the space below the disc 1 and surrounded by the guide shaft 8, the guard ring 16, and the carriage 4, so that a bend R for bending can be secured.

With this structure, the FPC 12
There is no need to arrange
7 becomes unnecessary and the thickness can be reduced. Further, it is not necessary to configure the bending R of the FPC on the outside of the carriage 4, and the size can be reduced.

(Embodiment 2) Another shape of the guard member will be described. FIG. 5 is a configuration diagram of the optical disk device according to the second embodiment. In FIG. 5, the guard ring 16
A recess 18 is formed at the position of the bent portion of the FPC 12. The FPC 12 has a spring property due to the characteristics of its material. In the second embodiment, as the carriage 4 moves inward, the FPC 12 is folded to generate a repulsive force due to spring properties, thereby applying a load to the feed motor 9 for moving the carriage 4 to the inner periphery, thereby increasing current consumption. . Since this repulsive force increases in inverse proportion to the value of R at the bent portion of the FPC 12, increasing R increases the current consumption. FP folded in depression 18 shown above
This R can be increased by entering the bent portion of C12, so that the current consumption can be reduced as compared with the embodiment.

[0016]

As described above, according to the present invention, by arranging the FPC 12 between the spindle motor 15 and the carriage 4, the space can be effectively utilized, and a thin and small optical disk device can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an optical disk device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of an optical disc device according to another embodiment of the present invention.

FIG. 3 is a sectional view of FIG. 1;

FIG. 4 is a sectional view of FIG. 2;

FIG. 5 is a configuration diagram of an optical disk device according to a second embodiment.

FIG. 6 is a configuration diagram of a conventional optical pickup.

FIG. 7 is a sectional view of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc 2 Objective lens 3 Laser unit 4 Carriage 6 Base 7 Screw shaft 8 Guide shaft 9 Feed motor 11 Wiring material 12 FPC 14 Turntable 15 Spindle motor 16 Guard ring 17 Space 18 Depression

Claims (2)

[Claims] A turntable for mounting an optical disk; a spindle motor for rotating and driving the turntable; a photoelectric conversion unit for emitting light to the optical disk and converting reflected light from the optical disk to an electric signal; A carriage mounted with a conversion unit and movable in the radial direction of the optical disc; and a bendable flat wiring member provided on the carriage for making an electrical connection to the photoelectric conversion unit. The plane wiring member is arranged so that the plane is perpendicular to the plane formed by the optical disk, and the flat wiring material bends and extends in the space formed by the optical disk, the spindle motor, and the carriage as the carriage moves in the radial direction. An optical disk device characterized by being arranged as follows. 2. A turntable for mounting an optical disk, a spindle motor for rotating and driving the turntable, a photoelectric conversion unit for emitting light to the optical disk and converting reflected light from the optical disk into an electric signal, A carriage mounted with a conversion unit and movable in the radial direction of the optical disc; a bendable planar wiring member provided on the carriage for making an electrical connection to the photoelectric conversion unit; A guard member that protects and guides the planar wiring member at a portion facing the carriage, and arranges the plane of the planar wiring member so as to be perpendicular to a plane formed by the optical disc, and allows the carriage to move in the radial direction. Accordingly, the plane wiring is formed in a space formed by the optical disc, the spindle motor, and the carriage. Are arranged so as to bend and extend, and a recessed bent portion is provided in a portion of the guard member corresponding to a portion where the flat wiring material is bent, and the recessed bent portion of the guard member is provided when the flat wiring material is bent. An optical disk device, wherein the planar wiring member is disposed so as to be bent and housed therein.