JP3033869B2 - Pickup cleaning device for optical information recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk-shaped information recording medium (for example, an optical disk, a magneto-optical disk, etc.
The present invention relates to an optical information recording / reproducing apparatus for recording and / or reproducing information on and from an "optical disk", and more particularly 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 disk player for reproduction only, a video disk player, or a magneto-optical mini disk 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 signal such as sound, video, control, a single or combined modulation signal of a computer signal.

[0002]

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

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

[0004]

However, the conventional optical information recording / reproducing apparatus does not have a built-in device for automatically cleaning the lens of the optical pickup. The apparatus itself must be disassembled, and in particular, in a model in which an optical disk is set on a turntable by a loading device, there is a problem that cleaning is difficult because the optical pickup is not exposed. . In addition, an optical disc is placed on the turntable, and a cleaning device is provided under the turntable or near the optical disc, and the optical pickup near the turntable is placed while the optical disc is placed on the turntable. Some of them are cleaned, but there is a problem in that dust on the optical pickup adheres to the signal recording surface of the optical disk during cleaning and becomes dirty.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems with respect to the conventional cleaning of an optical pickup.
A cleaning member is provided on the clamper without setting the optical disc on the turntable, and by rotating the clamper, the lens of the optical pickup is automatically cleaned, and the information signal surface of the optical disc can be prevented from being stained. An object of the present invention is to provide an optical pickup cleaning device.

[0006]

In order to achieve the above-mentioned object, a pickup cleaning device of an optical information recording / reproducing apparatus according to the present invention comprises a disc mounted between a disc and a turntable for rotating the disc. A surface provided on the clamper to be held so as to protrude outward from the peripheral end of the turntable, and a length provided on the surface and reaching an optical pickup for recording / reproducing a signal recorded on a disk. And a cleaning member.

[0007]

According to the optical pickup cleaning device of the present invention, when the disc is rotated without setting the disc on the turntable, the clamper is pressed against the turntable because the clamper is pressed against the turntable. To rotate.

At this time, since the optical pickup starts reproduction from the inside of the disc, it is located first at the innermost position, and the clamper is provided with a cleaning member long enough to reach the optical pickup. The lens of the optical pickup is rubbed by the cleaning member to clean the lens.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 mounted on a turntable 1 rotated by a motor (not shown), and the clamper 2 is pressed downward by the lowering of the clamper arm 5.
It is fixed on the turntable 1 and rotates together 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 transmitting the laser beam to the lens. In 3, the light moves while converging on the information signal surface, and the reflected light is converted into an electric signal by a photosensitive element.

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

When the reproduction is commanded without placing the optical disc A on the turntable 1, the clamper 2 is moved downward with respect to the turntable 1 by lowering the clamper arm 5.
Is lowered, and the contact surface 2a comes into contact with the turntable 1, so that when the turntable 1 rotates, the clamper 2 also rotates.

The optical pickup B moves to this position in order to start reproduction from the position closest to the turntable 1 by this reproduction command, so that the tip of the rotating brush 4 moves the upper surface of the lens 3 upward. This is done by rubbing, dusting off dust accumulated on it, and cleaning it.

The bristle of the brush 4 is hard enough not to damage the lens 3. Therefore, even when the optical disc A is placed on the turntable 1, as shown in FIG. The brush 4 is curved and does not hinder the clamping of the optical disc A between the turntable 1 and the clamper 2. On the turntable (and during cleaning)
Since the optical disk is not set, the information signal surface of the optical disk is not stained.

[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 turntable is rotated. The cleaning member on the surface that protrudes outward rubs the lens of the optical pickup that is moving inward.

For this purpose, dust accumulated on the lens is removed by a cleaning member, and the dust is cleaned.
It is possible to eliminate an information signal reproduction error due to dust, lack of sensitivity, and the like, and perform accurate reproduction. In addition, the information signal surface of the disc can be prevented from being stained.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the same.

FIG. 3 is a longitudinal sectional view showing a state where a disk is set.

[Description of Signs] A disk B optical pickup 1 turntable 2 clamper 3 lens 4 cleaning member (eg, brush)

Claims (1)

(57) [Claims] 1. A surface provided on a clamper for holding a disk between a turntable on which the disk is mounted and rotated, the surface protruding outward from a peripheral end of the turntable, and a surface provided on the surface. A pickup cleaning device for an optical information recording / reproducing apparatus, comprising: a cleaning member provided to reach an optical pickup for recording / reproducing a signal recorded on a disk.