JPH04106771A - Cleaning device for objective lens in optical disk device - Google Patents

Abstract

PURPOSE:To easily exchange a cleaning member and to safely clean an optical system without any trouble for making the device thin and compact by cleaning an objective lens by the rotation of the cleaning member due to the rotation of a disk motor. CONSTITUTION:When a case 10 is inserted to the main body of the device, the case is fixed to a holder 12 and a rotary body 14 is loaded on a disk table 15. When the power source of the motor is turned on, a disk motor 22 is rotated at low speed and with the turn of the disk table 15, the rotary body 14 is rotated. On the other hand, an objective lens 18 is simultaneously moved vertically forcedly by the operation of an actuator for focusing. The rotation of the rotary body 14 is transmitted through a belt 19 to a supporting part 16c of a cleaning member 16. Thus, the cleaning member 16 is rotated around a projecting shaft part 16a, the cleaning part 16d slides and contacts the vertically moving objective lens 18 by this rotation and dust stuck onto the objective lens 18 is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cleaning device for an objective lens in an optical disk device. The present invention relates to an optical disc device that reads and reproduces information contained in a disc.

Conventional technology When a cartridge case containing an optical disc is inserted into a holder, this is detected and the optical disc is placed in the recording/playback position.The disc motor then rotates the optical disc, and the optical system performs recording/playback on the optical disc. An optical disc device that does this has been developed. In this case, if dust adheres to the optical system that records and reproduces information, the optical characteristics will be affected depending on the degree of dust, and the recording and reproduction capabilities will deteriorate, causing problems with the stability of the device's operation. Measures against dust in the system are essential.

If dust or dirt adheres to the objective lens, the device must be disassembled and the optical head removed, and the optical head must also be disassembled and cleaned with cotton swabs, cleaning paper, etc.
It is troublesome to handle, and in particular, such cleaning work cannot be carried out in ordinary households because they do not have cleaning room facilities. Therefore, some video disc recorders have been proposed for the purpose of eliminating such inconveniences.

This is because, as shown in Fig. 4, when the power is turned on, the optical system l (optical head la and objective lens lb) that was located on the inner side of the disk moves to the outer side of the disk (in the direction of arrow A), and the optical system l (optical head la and objective lens lb) moves to the outer side of the disk (in the direction of arrow A). During this operation, the brush portion 2a of the cleaning member 2 provided on the outer circumferential side of the disk comes into contact with the objective lens 1b, and dust attached to the objective lens lb is removed. or be removed.

On the other hand, conventionally, a leaning disc as shown in FIG. 5 has been proposed for CD players. Same figure (A)
1 is a plan view thereof, and FIG. 10B is an enlarged cross-sectional view of the portion within the broken line in FIG. As shown in FIG. 3A, a cleaning portion (cloth material) 41.4□ is provided on the lower surface of the cleaning disk 3, and the rotation of the disk 3 causes the cleaning portion 4.4. ，
It slides into contact with the objective lens 5 at an angle of 4°, and dust attached to the objective lens 5 is removed.

Problems to be Solved by the Invention In the conventional example shown in FIG. 4, the cleaning member 2 is provided above the optical system 1, which makes it difficult to make the device thinner and smaller. The provision of the cleaning member 2 increases the cost, and there are also problems such as the necessity of removing the exterior of the device in order to replace the cleaning member 2, which is difficult for the user to do.

On the other hand, in the conventional example shown in FIG. 5, a relatively strong force is applied to the objective lens 5 in the lateral direction from the cleaning member 41.4□ due to the rotation of the disk 3, which may damage the optical system. There were some problems.

The present invention provides a cleaning device for an objective lens in an optical disk device, which can be configured at low cost without causing problems in making the device thinner and smaller, allows easy replacement of cleaning members, and can safely clean the optical system. The purpose is to

Means for Solving the Problems The present invention provides a rotating body that is fitted with a disk motor in an apparatus main body and rotates, and a rotating body that is supported on a shaft at a position facing an objective lens.
The cleaning member is provided with a cleaning member that rotates in engagement with the rotating body, and the objective lens is cleaned by the rotation of the cleaning member caused by the rotation of the disk motor.

Since the working cleaning member rotates while being supported on its axis at approximately the same position as the center of the objective lens, strong force is not applied to the objective lens from the lateral direction as in the conventional example, and there is no risk of damaging the optical system. Further, since no special mechanism is provided in the main body of the device, there is no problem in making the device thinner and more compact, and it does not lead to higher costs. Furthermore, since the case can be cleaned simply by mounting it inside the main body of the apparatus, even a general user can easily handle it.

Embodiment FIG. 1 is a sectional view of a main part of an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the main part. In FIG. 1, IO is a cleaning cartridge case (hereinafter referred to as a case), and as shown in FIG. 3, it has approximately the same external shape as a disk cartridge case housing a general optical disk used for recording and reproduction. As shown in the exploded perspective view of the entire device in FIG.
When the disk is inserted into the holder 12 and holder guide 13 through the disk mounting opening 11a, the device is inserted through the rotating body 14 (made of magnetic material) provided in the center or the notch 10a provided on the bottom surface. The rotating body 14 is configured to face a disk table 15 provided on a fixed plate 20 of the main body, and to be placed on the disk table with a rotating shaft 16 of the disk table 15 inserted through a hole 14a of a rotating body 14.

The rotating body 14 has its fitting portion 14b fitted into a protrusion 10b provided in the case IO, and is rotatably supported.

Reference numeral 16 denotes a cleaning member, which is composed of a protrusion shaft portion 16a, a collar portion 16b, a support portion 16c, and a cleaning portion +6d. Among these, the protrusion shaft portion 16a, the collar portion 16b, and the support portion 16c are integrally formed, and the cleaning portion 16d is formed of, for example, a brush structure (a sponge, soft cloth, etc. may also be used). and is attached to the lower surface of the support portion 16c. The cleaning member 16 has a protruding shaft portion 15a in a case I so that its cleaning portion 16d faces the objective lens 18 of the apparatus main body.
It is inserted into the hole IO provided on the upper surface of O, and the flange 16
b is fitted into the holding part 17 provided in the case 10,
It is rotatably held within the case 10. in this case,
The support portion 16c faces the rotating body 14, and the cleaning portion 16d is configured to protrude downward through the notch 10a of the case 10. 19 is a belt, which connects the rotating body 14 and the cleaning member 1;
It is wound between the support portion 16c of No.6.

Here, when case IO is inserted into the main body of the device, holder 1
2, and the rotating body 14 is placed on a disk table 15. At this time, the rotating body 14 is reliably clamped onto the disc table 15 by attraction by the magnet 21 fixed to the disc table 15.

When the motor power is turned on, the disk motor 22 is activated by a command from the personal computer if the personal computer and the device are connected, or by a command from the ROM in the device if both are not connected. Rotated at low speed, disc table 1
The rotating body 14 is rotated in accordance with the rotation of the rotating body 5. Meanwhile, at the same time, the objective lens 18 is moved up and down emphatically by the operation of a focus adjustment actuator (not shown). The rotation of the rotating body 14 is controlled by the cleaning member 16 via the belt 19.
is transmitted to the support portion 16c of the cleaning member 16.
is rotated around the protrusion shaft portion 16a, and as the cleaning portion 16d is rotated, the cleaning portion 16d comes into sliding contact with the objective lens 18 which is moving up and down, and dust attached to the objective lens 18 is removed.

In this case, unlike the conventional example shown in FIG. 5, the cleaning part 16d has a structure in which it is pivoted at approximately the same position as the center of the objective lens 18 and slides into contact with the objective lens 18 by rotating. Unlike the conventional example shown in FIG. 1, no strong force is applied to the objective lens 18 from the lateral direction, and there is no risk of damaging the optical system. Further, unlike the conventional example shown in FIG. 4, there is no special mechanism provided in the main body of the device, so there is no problem in making the device thinner and more compact, and it does not lead to higher costs. In addition, since the case IO can be cleaned simply by installing it into the main body of the device, it can be easily handled by a general user and does not require the assistance of a service person. For example, if a new cleaning unit containing alcohol or the like is always prepared, strong dirt adhering to the objective lens 18 can be easily removed.

In the above embodiment, the rotating body 14 and the support body 16C are engaged by the heald 19, but the present invention is not limited to this, and for example, a gear or the like may be used.

As described in detail, according to the present invention, there is no special mechanism provided in the main body of the device, so there is no problem in making the device thinner and smaller, and it does not lead to higher costs. In addition, the cleaning member can be easily handled by general users because the case can be cleaned simply by attaching the case into the main body of the apparatus.Furthermore, the cleaning member is rotatably supported on a shaft at approximately the same position as the center of the objective lens. Therefore, no strong force is applied to the objective lens from the lateral direction, and there is no risk of damaging the optical system.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the main parts of an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts of the embodiment of the invention, and Fig. 3 is an overall view of the apparatus to which the present invention is applied. An exploded perspective view, FIG. 4 is a diagram for explaining one conventional example, and FIG. 5 is a diagram for explaining another conventional example. 10...Cleaning cartridge case, lOa・
...Notch, 10b...Protrusion, lOc, 14a...
Hole, 11...Hesel, lla...Disc mounting port, 12
... Holder, 13... Holder guide, 14... Rotating body, +4b... Fitting part, I5... Disc table,
16...Cleaning member, 16a/Protrusion shaft portion, 16c...
Supporting part, 16d・Cleaning part, 17... Holding part, 18... Objective lens, 19. Belt, 21... Magnet, 22.
...Disc motor.

Claims (1)

[Scope of Claims] A cleaning cartridge case that is inserted into and fixed in the apparatus main body, and inside the cleaning cartridge case, there is a rotating body that rotates by fitting with a disk motor in the apparatus main body. , comprising a cleaning member that is rotatably supported in a position facing the objective lens in the apparatus main body and rotates by engaging with the rotating body, and the objective lens is removed by rotation of the cleaning member due to rotation of the disc motor. 1. A cleaning device for an objective lens in an optical disc device, characterized in that the cleaning device cleans the objective lens in an optical disk device.