JPH05109255A - Disk drive - Google Patents

Abstract

PURPOSE:To make a device small in size, thin in thickness and light in weight by decreasing the number of printed boards mounting motors in a disk drive provided with a spindle motor rotating a turntable and a thread motor running a pickup. CONSTITUTION:In the disk drive 1 provided with the spindle motor 3 rotating the turntable 2 and the thread motor 5 running the pickup 4, the spindle motor 3 and the thread motor 5 are mounted on the same printed board 8 in a state where rotating shafts 6 and 7 are in parallel with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc drive such as a CD player.

[0002]

2. Description of the Related Art As a disk drive, a BSL motor is used as a spindle motor, a DC motor is used as a sled motor, and a rotational axis of the sled motor is orthogonal to a rotational axis of the spindle motor, that is, a pickup. It is known that the spindle motor and the thread motor are mounted on dedicated printed circuit boards in a state of being oriented in the orthogonal direction.

[0003]

By the way, in the above-mentioned conventional disk drive, since the spindle motor and the thread motor are mounted on different printed circuit boards, respectively, the number of printed circuit boards increases, which causes a cost increase. However, there is a problem that the device becomes large and the weight becomes heavy.

The present invention has been made for the purpose of solving the above conventional problems.

[0005]

In a disk drive provided with a spindle motor for rotating a turntable and a sled motor for traveling a pickup, the spindle motor and the sled motor are the same with their rotation axes parallel to each other. Mounted on a printed circuit board.

[0006]

Since the printed circuit board for mounting the spindle motor and the printed circuit board for mounting the thread motor are used in common, the number of printed circuit boards for mounting the motor is reduced, the cost is reduced, and the size, thickness and weight of the device are reduced. be able to.

[0007]

The present invention will be described below with reference to the drawings.

Reference numeral 1 is a laser disk drive as a disk drive of the present invention, and the laser disk drive 1 comprises a spindle motor 3 for rotating a turntable 2 and a thread motor 5 for running a pickup (optical head) 4. ing.

A BSL motor is used as the spindle motor 3 and a DC motor is used as the sled motor 5.

The spindle motor 3 and the sled motor 5 are mounted on the same printed circuit board 8 with their rotating shafts 6 and 7 parallel to each other.

Reference numeral 11 denotes a chassis of the disk drive 1, and a rectangular opening 12 for allowing the laser pickup 4 to travel in the radial direction of the disk is provided in the center of the chassis 11 and the opening is provided. 12
In the vicinity of one side 13 and the other side 14, respectively,
Motor rotation shaft insertion holes 15, 16 and screw insertion holes 17,
18, 19, 20 are provided.

Then, the rotary shafts 6 and 7 are inserted into the first and second motor rotary shaft insertion holes 15 and 16, respectively, and the upper surfaces of the spindle motor 3 and the thread motor 5 are pressed against the lower surface of the chassis 11. With the screws 21 ... 21, the spindle motor 3 and the thread motor 4 are attached to the lower surface of the chassis 11, and the turntable 2 is attached to the rotary shaft 6 of the spindle motor 3 protruding toward the upper surface of the chassis 11. There is.

A pickup guide shaft 22 is attached along one side 14 of the chassis 11, and the guide shaft 22 is provided in the pickup 4 to form a guide bearing hole 2.
By inserting the pickup 3 into the pickup 3, the pickup 4 is moved along the pickup guide shaft 22 in the radial direction of the disc.

The worm wheel 2 is attached to the rotary shaft 7 of the sled motor 5 protruding from the upper surface of the chassis 11.
4 is attached, and the worm wheel 24 meshes with the worm gear 25 on the upper surface side of the chassis 11.

A first gear 26 is provided on the lower surface of the worm gear 25, and the first gear 26 is the chassis 11
The lower surface side of the is meshed with the second gear 27.

A pinion 28 is provided on the upper surface of the second gear 27.
The pinion 28 meshes with the rack 29 provided on one side of the pickup 4 on the upper surface side of the chassis 11.

The printed circuit board 8 is formed to have a size of a fraction of the size of the chassis 11, and the spindle motor 3 and the sled motor 5 are mounted on the printed circuit board 8 as described above. There is.

As shown in FIG. 3, the spindle motor 3 has a motor housing 32 mounted on the printed circuit board 8 by screws 31 ... 31, and the motor housing 3
2, a rotating shaft 34 rotatably mounted via bearings 33, 33, a rotor back yoke 35 mounted on the rotating shaft 34, a rotor magnet 36 mounted on the rotor back yoke 35, and the rotor. A stator (coil) 37 mounted on the printed circuit board 8 in a state of being opposed to the magnet 36, and a yoke 39 mounted on the lower surface of the printed circuit board 8 and also functioning as a thrust bearing 38, the brushless In addition to being configured as a rotor linear motor (BSL),
A DC motor is used as the sled motor 5.

On the printed circuit board 8, the drive circuit (not shown) such as the spindle motor 3 and various parts such as the limit switch 40 and the connector 41 as shown in FIG. 1 are accommodated within the projected area of the chassis 11. Is mounted as.

The disk drive of the embodiment has the structure described above, and when the spindle motor 3 is energized, the turntable 4 is rotated by the motor 3 and the disk chucked on the turntable 4 is Rotate.

When the thread motor 5 is energized, the worm wheel 24, the worm gear 25, the first gear 2
6, the second gear 27, the pinion 28, the rack 29 is transmitted, the pickup 4 is moved in the radial direction of the disc,
Recording and reproduction are performed.

[0022]

According to the disk drive of the present invention, the spindle motor for rotating the turntable and the thread motor for traveling the pickup are mounted on the same printed circuit board with their axes parallel to each other. There is.

(1) It is possible to reduce the cost by reducing the number of printed circuit boards.

(2) Since the number of printed circuit boards is reduced, the number of harnels for connecting the printed circuit board and the chassis can be naturally reduced.

(3) As compared with the case where the spindle motor and the spindle motor are mounted on different printed circuit boards, the size, the thickness and the weight can be reduced.

(4) By mounting two motors, a spindle motor and a thread motor, on the same printed circuit board, the strength of the printed circuit board can be increased.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a disk drive of the present invention.

FIG. 2 is a perspective view of an assembled state.

FIG. 3 is a sectional view of a spindle motor portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk drive, 2 ... Turntable, 3 ... Spindle motor, 4 ... Pickup, 5 ... Thread motor, 6 ... Spindle motor rotation axis, 7 ... Thread motor rotation axis, 8 ... Printed circuit board.

Claims (1)

[Claims] 1. A spindle motor for rotating a turntable and a sled motor for traveling a pickup, wherein the spindle motor and the sled motor are mounted on the same printed circuit board with their rotation axes parallel to each other. A disk drive characterized by being installed.