JPH05234094A - Information recording/reproducing device - Google Patents

Abstract

PURPOSE:To improve a servo characteristic and to more stably move an optical pickup by minimizing vibration generated by a traverse motor at the time of movement of the optical pickup, in an optical information recording/ reproducing device such as a compact disk player, etc. CONSTITUTION:In the pitching direction of a sliding part of an optical pickup 3 and a guide shaft 7, or in the yawing direction, a recessed part 8 is provided, and grease 9 applied to this recessed part is used as an elastic material. In such a way, vibration at the time of movement of the optical pickup 3 is reduced, and this device is constituted so as to record and reproduce stably information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing device such as a compact disc device.

[0002]

2. Description of the Related Art This type of technology uses a stepping motor as a traverse motor as a method for accessing an optical pickup which records and reproduces information at an arbitrary position from a disk which is a conventional information recording medium, and also controls it. There is an open control information recording / reproducing device.

[0003]

However, in the above conventional configuration, the traverse motor is open control,
Since there is a gap for sliding between the guide shaft for regulating the moving direction and the sliding part of the optical pickup, unnecessary vibration in the pitching direction or yawing direction is generated when the optical pickup is accessed, and the recording and reproduction of information is performed. There was a problem that reliability was deteriorated.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an information recording / reproducing apparatus which minimizes vibration generated by a stepping motor and moves an optical pickup more stably.

[0005]

To achieve this object, the present invention provides a sliding portion between a guide shaft for regulating the position of the optical pickup in the moving direction and the optical pickup, and pitching of the movement of the optical pickup. Direction or yawing direction is provided with a concave portion, the concave portion is provided with vibration preventing means of elastic material such as grease, or a piezoelectric element movably held on the sliding portion on the optical pickup is given a movement control command, It has a configuration including vibration preventing means for varying the sliding portion clearance.

[0006]

With this structure, unnecessary vibrations in the pitching direction and the yawing direction, which are most noticeable when the optical pickup is moved, can be reduced, and the reliability of the information recording / reproducing apparatus can be improved.

[0007]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a structure of an information recording / reproducing apparatus in a first embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a sliding portion of a guide shaft and an optical pickup. In FIGS. 1 and 2, 1 is a disk having spiral information tracks, 2 is a spindle motor for rotating the disk 1, 3 is an optical pickup, 4 is an optical pickup 3
A stepping motor for moving the stepping motor 4, a stepping motor drive circuit for driving the stepping motor 4, and a reference numeral 6 for holding the optical pickup 3 movably in the radial direction of the disk 1 and transmitting the torque of the stepping motor 4 to the optical pickup 3. The lead screw constitutes the traverse means by the stepping motor 4, the stepping motor drive circuit 5, and the lead screw 6. Reference numeral 7 denotes a guide shaft that regulates the position of the disc 1 when moving in the radial direction;
A concave portion 9 provided in the yawing direction is grease applied on the concave portion 8, and the concave portion 8 and the grease 9 constitute vibration preventing means.

The operation of the information recording / reproducing apparatus configured as above will be described below. Disk 1
In order to read the information from the arbitrary position of the optical pickup 3 by the optical pickup 3, the stepping motor drive circuit 5 receives a target command from the stepping motor 4 and the lead screw 6 receives the target command.
Is rotated and a thrust force is applied to the optical pickup 3 to move it to a predetermined position. However, at this time, since there is a gap between the optical pickup 3 and the guide shaft 7, the optical pickup 3 vibrates in the pitching direction and the yawing direction. At this time, the grease 9 applied to the concave portion 8 on the guide shaft 7 and the optical pickup 3 come into contact with each other to absorb the vibration in a certain direction of the concave portion 8 and reduce the vibration of the optical pickup 3.

In this embodiment, the recess 8 is formed on the guide shaft 7.
However, the same effect can be obtained by providing a concave portion in the sliding portion with the guide shaft 7 on the optical pickup 3 and filling the concave portion with grease.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows the structure of an information recording / reproducing apparatus according to the second embodiment of the present invention, and FIG. 4 is an enlarged sectional view of a sliding portion between a guide shaft and an optical pickup. In FIGS. 3 and 4, 1 is a disc having spiral information tracks, 2 is a spindle motor for rotating the disc 1, 3 is an optical pickup, 4 is a stepping motor for moving the optical pickup 3, and 5 is a stepping motor 4. A stepping motor drive circuit 6 for driving holds the optical pickup 3 movably in the radial direction of the disc 1, and a lead screw 7 for transmitting the torque of the stepping motor 4 to the optical pickup 3.
Is a guide shaft that regulates the position of the disk 1 when it moves in the radial direction, and 10 is a piezoelectric element that is provided in a sliding portion with the guide shaft 7 on the optical pickup 3.

The operation of the information recording / reproducing apparatus configured as described above will be described below. Disk 1
In order to read the information from the arbitrary position of the optical pickup 3 by the optical pickup 3, the stepping motor drive circuit 5 receives a target command from the stepping motor 4 and the lead screw 6 receives the target command.
Is rotated to apply a thrust to the optical pickup 3 to move the optical pickup 3 to a predetermined position. However, at this time, since there is a gap between the optical pickup 3 and the guide shaft 7, the optical pickup 3 vibrates in the pitching direction and the yawing direction. The end of the movement is detected by the end of the command from the stepping motor drive circuit 5, and the vibration amount is detected by the focus error signal of the optical pickup 3 and the tracking error signal (not shown).
A voltage corresponding to the amount of vibration is applied to. As a result, it is possible to regulate the gap of the sliding portion and reduce the amount of vibration.

[0012]

As described above, according to the present invention, the guide shaft is provided with a concave portion in the pitching direction or the yawing direction of the optical pickup movement, and the concave portion is provided with a vibration preventing means of an elastic material such as grease. The piezoelectric element movably held by the sliding portion is provided with vibration preventing means for giving a control command during movement to vary the sliding portion gap, thereby saving space and low cost, and is generated when the optical pickup moves. It is intended to realize an excellent information recording / reproducing apparatus capable of reducing vibration and stably recording / reproducing information.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts showing a configuration of an information recording / reproducing apparatus in a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a sliding portion between a guide shaft and an optical pickup according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a main part showing a configuration of an information recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a sliding portion between a guide shaft and an optical pickup according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Disk 2 Spindle Motor 3 Optical Pickup 4 Stepping Motor 5 Stepping Motor Drive Circuit 6 Lead Screw 7 Guide Shaft 8 Recess 9 Grease 10 Piezoelectric Element

Claims (2)

[Claims] 1. A disc on which information is recorded in a spiral shape, a motor for rotating the disc, an optical pickup for recording and reproducing information recorded on the disc, and a radius of the optical pickup for the optical pickup. Traverse means including a stepping motor for moving a predetermined distance in the direction, guide means slidably held with the optical pickup for position regulation of the traverse means in the moving direction, the guide means and the light. An information recording / reproducing apparatus having a concave portion in a sliding portion with respect to a pickup and in at least one of a pitching direction or a yawing direction of traverse movement, and a vibration preventing means provided with an elastic material in the concave portion. 2. The vibration preventing means comprises a vibration preventing means comprising a sliding element between the optical pickup and the guide means, and a piezoelectric element movably held on the sliding portion on the optical pickup. The information recording / reproducing apparatus according to claim 1.