JP2517854Y2 - Drive device for optical pickup - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to an optical pickup for reading or writing recorded information on the disc by rotating a disc mounted on a turntable and moving the optical pickup in a radial direction. A drive device.

"Prior Art" Conventionally, two motors arranged opposite to each other are provided, one motor is mounted on the pickup side, the other motor is mounted on the chassis side, and a screw shaft is connected and fixed to the output shaft of one motor, There has been an optical pickup driving device in which a receiving cylinder screwed to the screw shaft is connected and fixed to the output shaft of the other motor, and the pickup is integrally moved together with the one motor.

[Problems to be Solved by the Invention] In the prior art, the moving-side motor is slidably supported on the two parallel guide rails like the pickup. Therefore, the moving direction of the pickup and the moving direction of the moving-side motor. There was a problem that it was difficult to match with each other and it was difficult to give a proper feed to the pickup.

[Means for Solving Problems] Therefore, the present invention is provided with two motors arranged to face each other, one motor is mounted on the pickup side, the other motor is mounted on the chassis side, and the output shaft of one motor is mounted. In the drive device of the optical pickup, the screw shaft is connected and fixed to the output shaft of the other motor, and the receiving cylinder screwed to the screw shaft is connected and fixed to the output shaft of the other motor. Three guide rails are laid horizontally in parallel, and the pickup is slidably supported by the middle guide rail and one guide rail adjacent to the middle guide rail, and the middle guide rail and the other guide rail adjacent to the middle guide rail. And the movable side motor is slidably supported, and the pickup and the movable side motor are integrally connected by a coupling arm.

[Operation] Therefore, since the intermediate guide rail is shared as the guide rail of the pickup and the moving side motor, the moving direction of the pickup and the moving side motor can be easily matched, and the moving by the intermediate guide rail is possible. The pickup and the moving side motor are integrally connected in the same direction, and the pickup is moved by moving the comparatively heavy moving side motor. Therefore, more stable movement of the pickup can be obtained and a turn for rotating the disc. It is possible to prevent the pickup from vibrating due to the rotational vibration of the table, etc., and it is possible to improve the optical pickup performance as compared with the conventional case.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an essential part, FIG. 2 is an overall plan view of the disk device, and FIG. 3 is a partial explanatory view. The chassis (2) installed in the box-shaped cabinet (1) is turned to the lower central side. The table motor (3) is fixedly installed, the output shaft (4) of the motor (3) is projected to the upper surface side of the chassis (2), the turntable (5) is provided at the upper end, and the optical disk (6) for recording information is provided. ) Is stored in a pack (7), the pack (7) is put in and taken out through an entrance (8) opened in the cabinet (1), and the disc (6) is mounted on a turntable (5) and rotated. Is configured.

Further, two pickup rails (10) and (11) are laid across the chassis (2) via a pedestal (9) ... in a substantially parallel manner, and an optical pickup (12) is attached to the rails (10) and (11). It is slidably installed and reads information by shining light from a pickup (12) onto a disc (6) of a turntable (5) and guides it to the chassis (2) via pedestals (13) and (13). The guide rail (14) and the long pickup rail (11) that are provided substantially parallel to each other by horizontally extending the rail (14)
A motor bracket (15) is slidably mounted between the motor bracket (15) and a coupling arm (1
6) is connected to and fixed to the upper surface of the pickup 12 between the rails 10 and 11, and the moving side motor is a pickup motor that moves the pickup 12 toward and away from the turntable 5 in the radial direction. 17), the motor (17) is fixed to the bracket (15), and the motor (17) and the pickup (12) are integrally slid.

Further, the stationary side motor (19), which is a rotating body, is fixedly mounted on the upper surface of the chassis (2) facing the motor (17) via a bracket (18), and the motors (17) (19) having substantially the same characteristics. ) Each output shaft (20) (21) is arranged to face each other on substantially the same axis, and is provided with a screw shaft (22) and a receiving cylinder (23) that are a transmission mechanism that converts a rotational force into a sliding force. , A receiving cylinder (2) for screwing the screw shaft (22) while connecting and fixing the screw shaft (22) to the output shaft (20) of the moving side motor (17).
Bearing 3) on the output shaft (21) of the stationary motor (19)
It is connected and fixed via a screw shaft (22) to the output shaft (21) of the stationary motor (19) provided on the chassis (2) side.
Also, the output shaft (20) of the moving side motor (17) is connected via the receiving cylinder (23), and the rotating speeds of the output shafts (20) and (21) are made different so that the moving side motor (17) and the pickup ( 12) is configured to slide.

This embodiment is configured as described above, and the screw shaft (22) and the receiving cylinder (23) are fixed by rotating the motors (17) and (19) in different directions at the same rotation speed. In this state, the moving side motor (17) and the pickup (12) are stopped and maintained at a constant position by rotating integrally.

Further, by rotating one of the motors (17) and (19) one rotation speed faster (slower), for example, the rotation speed difference between the screw shaft (22) and the receiving cylinder (23) becomes one rotation per minute. ,
The screw shaft (22) and the receiving cylinder (23) are extended (reduced) by one pitch for one minute, the moving side motor (17) and the pickup (12) are slightly moved, and the disc (6) is moved by the pickup (12). ) Information is read.

Furthermore, when one of the motors (17) or (19) is stopped to increase the rotational speed difference between the motors (17) and (19), or the rotational direction of one of the motors (17) and (19) is reversed. As a result, the rotational speed difference between the screw shaft (22) and the receiving cylinder (23) becomes significantly large, and the moving side motor (17) and the pickup (12) are moved at high speed, and the pickup (12)
Is quickly moved to a desired position on the disc (6).

The pickup (12) has a moving side motor (17).
Can be fixed directly, and the stationary motor (1
Instead of 9), a rotating wheel such as a gear is provided, and the pickup (1
It is also possible to omit the stationary motor (19) by rotating the rotating wheel by a motor that is stopped and maintained while the movement of (2) is controlled, for example, a motor that moves the disk (6) in and out.

Further, although the pickup (12) is read-only, a magneto-optical disk structure in which information is written by irradiating the surface of the disk (6) with light to change magnetic force and reading the change in light reflectance, and the surface of the disk (6). Similarly to the above embodiment, the pickup (12) feeding mechanism such as the moving side motor (17) can be easily attached to the structure for writing the information by changing the capacitance of the device and reading the change of the electrostatic amount. is there.

[Advantage of Invention] As is apparent from the above-described embodiments, the present invention is provided with two motors (17) and (19) that are arranged to face each other.
7) to the pickup (12) side, and the other motor (1
9) is attached to the chassis (2) side, the screw shaft (22) is connected and fixed to the output shaft (20) of one motor (17), and the receiving cylinder (23) is screwed to the screw shaft (22). ) Is fixed to the output shaft (21) of the other motor (19), and the pickup (12) is moved integrally with the one motor (17). The three guide rails (10), (11) and (14) are laid horizontally in parallel, and the pickup (12) is slidable by the middle guide rail (11) and one guide rail (10) adjacent to it. Support and middle guide rail (11)
And the other guide rail (14) adjacent thereto supports the moving side motor (17) slidably, and the pickup (12) and the moving side motor (17) are integrally connected by a coupling arm (16). Since the intermediate guide rail (11) is shared as the guide rail of the pickup (12) and the moving side motor (17), the moving direction of the pickup (12) and the moving side motor (17) are easy. The pickup (12) and the moving side motor (17) whose moving directions are matched by the intermediate guide rail (11) are integrally connected to each other, and the relatively heavy moving side motor (1
Since the pickup (12) is moved by moving 7), more stable movement of the pickup (12) can be obtained, and the pickup (12) is vibrated by rotational vibration of the turntable that rotates the disc. The effect is that it can be prevented and the optical pickup performance can be improved as compared with the conventional case.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention, FIG. 2 is an overall plan view of a disk device, and FIG. 3 is a partial explanatory view. (2) …… Chassis (5) …… Turntable (6) …… Disk (12) …… Optical pickup (17) …… Moving side motor (pickup motor) (20) …… Output side (22) …… Screw shaft (transmission mechanism) (23) …… Receiving cylinder (transmission mechanism)

Claims (1)

(57) [Scope of utility model registration request] 1. A motor comprising two motors (17) (19) arranged opposite to each other, one motor (17) being mounted on a pickup (12) side and the other motor (19) being mounted on a chassis (2) side. , The screw shaft (22) is connected and fixed to the output shaft (20) of one motor (17), while the receiving cylinder (23) screwed to the screw shaft (22) is connected to the output shaft (20) of the other motor (19). A drive device for an optical pickup which is fixedly connected to (21) and integrally moves a pickup (12) together with one motor (17), and three guide rails (10) and (11) on the chassis (2). (14) is laid horizontally, and the pickup (12) is slidably supported by the intermediate guide rail (11) and one of the adjacent guide rails (10), and the intermediate guide rail (11) is also provided. And the other guide rail (14) adjacent to it and the moving side motor (17) A drive device for an optical pickup characterized in that the pickup (12) and the moving side motor (17) are integrally connected by a coupling arm (16).