JPH05307765A - Pickup cleaning device of optical information recording and reproducing device - Google Patents

Abstract

PURPOSE:To automatically clean a lens of an optical pickup by rotating a clamper without setting a disk on a turn table. CONSTITUTION:A surface 2b which is projecting in the farther outside direction than a circumferential edge of the turn table 1, is provided on the clamper 2 by which the disk A is held between the turn table which mounts and rotates the disks and the clamper. A brush 4 with a length which reaches the lens 3 of the optical pickup B is provided on the surface 2b.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a disc-shaped information recording medium (for example, an optical disc, a magneto-optical disc, etc.,
Hereinafter, the present invention relates to an optical information recording / reproducing apparatus for recording and / or reproducing information on / from an "optical disc", and more specifically to an objective lens cleaning mechanism of an optical head (optical pickup) used for reproducing the information. is there. The optical information recording / reproducing apparatus includes, but is not limited to, a compact disc player for reproduction only, a video disc player, or a magneto-optical mini disc player for both recording and reproduction, so-called CD-WO, CD-MO and the like. Absent. The information to be recorded / reproduced may be any of audio, video, control, a modulation signal of a computer signal alone or in combination.

[0002]

2. Description of the Related Art Conventionally, in an optical information recording / reproducing apparatus of this type, an optical pickup for reading an information signal of an information recording medium such as an optical disc converges a laser beam with a lens to produce a signal recording surface of the disc. The reflected light is guided to a photosensitive element by a lens and converted into an electric signal.

Therefore, when the lens of this optical pickup is soiled with dust or the like, the convergence to the disk surface becomes incomplete, the reflected light to the photosensitive element is weakened, and sufficient sensitivity cannot be obtained. Therefore, there is a drawback that a read error occurs.

[0004]

However, in the conventional optical information recording / reproducing apparatus, a device for automatically cleaning the lens of this optical pickup is not built in, and at the time of cleaning, it is artificial. The main body of the device must be disassembled, and in particular, in a model in which an optical disk is set on the turntable by a loading device, the optical pickup is not exposed, and there is a problem in that cleaning is difficult. . In addition, an optical disc is placed on the turntable, and a cleaning device is provided below the turntable or in the vicinity of the optical disc, and an optical pickup near the turntable is placed while the optical disc is placed on the turntable. Although some cleaning is performed, there is a problem in that dust on the optical pickup adheres to the signal recording surface of the optical disc and is contaminated during cleaning.

The present invention is intended to solve the above-mentioned problems with conventional cleaning of optical pickups.
By installing a cleaning member on the clamper and rotating the clamper without setting the optical disk on the turntable, the lens of the optical pickup can be automatically cleaned, and the information signal surface of the optical disk can be prevented from becoming dirty. An object is to provide an optical pickup cleaning device.

[0006]

In order to achieve the above object, a pickup cleaning device of an optical information recording / reproducing apparatus of the present invention places a disc between a turntable on which the disc is placed and which rotates the disc. The clamping clamper has a surface protruding outward from the peripheral end of the turntable, and a surface having a length reaching the optical pickup for recording / reproducing the signal recorded on the disk. And a cleaning member.

[0007]

In the optical pickup cleaning device of the present invention, when the disc is not set on the turntable but is rotated, the clamper is pressed against the turntable. Rotate to.

At this time, since the optical pickup starts reproduction from the inside of the disc, it is initially located at the innermost side, and the clamper is provided with a cleaning member having a length reaching the optical pickup. The lens of the optical pickup is rubbed by this cleaning member to clean it.

[0009]

Next, an embodiment of a pickup cleaning device for an optical information recording / reproducing apparatus according to the present invention will be described with reference to the drawings.
This will be described below. The optical disc A is placed on the turntable 1 rotated by a motor (not shown), and the clamper arm 5 is moved downward to press the clamper 2 downward.
It is fixed on the turntable 1 and rotates with the clamper 2.

An information signal is recorded on the lower surface of the optical disk A, and the optical pickup B moves the lower surface of the rotating optical disk A from the center side to the outer side, while the laser light is lensed. At 3, the light moves while converging on the information signal surface, and the reflected light is converted into an electric signal by the photosensitive element.

In such an optical information recording / reproducing apparatus, the clamper 2 is provided with a surface 2b protruding more than the outer diameter of the turntable 1 at a position higher than the contact surface 2a with the optical disk A. A cleaning member (for example, a brush) 4 having a length reaching the lens 3 of the optical pickup B is provided on the surface 2b.

When the reproduction is instructed without placing the optical disk A on the turntable 1, the clamper arm 5 descends with respect to the turntable 1 and the clamper 2 is moved.
Moves down, and its contact surface 2a contacts the turntable 1. Therefore, when the turntable 1 rotates, the clamper 2 also rotates.

In response to this reproduction command, the optical pickup B tries to start reproduction from the position closest to the turntable 1 and moves to this side, so that the tip of the rotating brush 4 moves above the upper surface of the lens 3. This is done by rubbing and scraping off the dust accumulated on it.

The hardness of the bristles of the brush 4 is such that the lens 3 is not damaged. Therefore, even when the optical disk A is placed on the turntable 1, as shown in FIG. The brush 4 is curved so that the clamper 2 does not hinder the holding of the optical disc A between the brush 4 and the turntable 1. On the turntable (also when cleaning),
Since the optical disc is not set, the information signal surface of the optical disc is not polluted.

[0015]

As described above, according to the present invention, if the disc is reproduced without placing the disc on the turntable, the clamper rotates together with the turntable, and the turntable provided on the clamper rotates. The cleaning member on the surface protruding outwards rubs against the lens of the optical pickup moving to the innermost side.

Therefore, the dust accumulated on the lens is removed by a cleaning member and cleaned.
It is possible to eliminate a reproduction error of an information signal due to dust, lack of sensitivity, etc., and it is possible to perform accurate reproduction. Further, it is possible to prevent the information signal surface of the disc from being soiled.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the above.

FIG. 3 is a vertical cross-sectional view showing a state where a disc is set.

[Explanation of symbols]

 A disk B optical pickup 1 turntable 2 clamper 3 lens 4 cleaning member (eg brush)

Claims (1)

[Claims] 1. A surface provided on a clamper for sandwiching the disk between a disk on which the disk is placed and which rotates the disk, and a surface provided so as to project outward from a peripheral end of the turntable, and the surface. A pickup cleaning device for an optical information recording / reproducing apparatus, comprising a cleaning member which is provided and has a length reaching an optical pickup for recording / reproducing a signal recorded on a disc.