JPH0422461Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a cleaning device for cartridge-type optical disks, which are used as large-capacity storage media in a wide range of fields such as office information management and computer auxiliary storage devices. It is something.

[Problems with conventional technology]

With the development of the information society, the amount of information handled is increasing significantly, and optical disk memories are attracting attention from the perspective of information management as well as for recording, storing, and retrieving information.

Optical disk memory records and reproduces signals by shining a laser beam focused on minute pits of about 1 micron formed on the surface of the disk. Therefore, it is difficult to avoid being affected by dust. Particularly when handling code information, a lower bit error rate is required during signal reproduction, so dirt and scratches on the surface become a more serious problem.

Therefore, it is desired that the surface of the optical disc is always clean, and the optical disc is often used as a cartridge-type optical disc housed in a cartridge. Cartridge-type optical discs have a recording/playback window installed in the cartridge, and a dust-proof shutter is attached to the window. When using an optical disc, the shutter is opened to record or play back.

As a method for removing dust on the surface of disk-shaped recording media such as optical disks,
183988, there is a method of wiping the surface of an information recording disk with a grounded conductive flocked part, but the flocked part rotates in the circumferential direction with respect to the disk while being in contact with the disc. Become.

Therefore, scratches on the disk surface due to friction between the flocked portion and the disk often occur in a long direction in the circumferential direction along the rotation of the disk.

By the way, it is currently difficult to avoid the influence of noise on the signals recorded on optical discs, so if it is necessary to improve this, it is necessary to include an error correction method such as the PCM method when recording the signal. A modulation method is used. For example, in the case of compact discs, using the CIRC method, even if a misreading of 0 and 1 signals occurs within a certain tolerance limit, it will be corrected to the correct 0 and 1 signals and the original music signal will be correctly reproduced. We have a system in place that allows us to do so. (Refer to the Laser Vision Disc Introduction published by Philosophy Publishing Co., Ltd.) With this error correction method, even if 1000 consecutive signals are misread, it can be restored to almost the original signal. Even if an error correction method is used, if the scratches are long in the circumferential direction due to friction in the disk circumferential direction, far more than 1000 consecutive errors may occur frequently. This is a problem because it cannot be completely corrected.

[Means to solve the problem]

The present inventor conducted repeated studies to solve these problems and came up with the present invention.

That is, the present invention provides a cartridge-type optical disk cleaning device that includes a method of moving the cleaning pad in a radial direction relative to the optical disk instead of moving the cleaning pad in the circumferential direction relative to the optical disk. Solve the problem by providing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, one embodiment of the present invention will be explained using figures from FIG. 1 to FIG. 5.

FIG. 1 is a sectional view of the vicinity of a cleaning pad in a state in which the cleaning pad portion of a cartridge type optical disk cleaning device is pushed in, which is an embodiment of the present invention. This cross section is taken along a plane that includes the center line of rotation of the optical disk and the direction of movement of the cleaning pad that moves in the radial direction.

The numbers and symbols used in each figure are common to each figure.
Explanations may be made out of the order of the figures.

In FIG. 1, a cartridge type optical disk 25
is placed on the rotational drive transmission section 9 in the cartridge type optical disk cleaning device.

The optical disk 8 in the cartridge 7 of the cartridge type optical disk 25 is coupled to the rotational drive transmission section 9 so that rotation is transmitted at the center of rotation.

In FIG. 1, there is a cleaning pad 23 on one side of the optical disk 8 at the opening 24 of the cartridge.
The state in which the cleaning pad 5 is lightly touching is shown.

The cleaning pad 5 is made of a feather-like soft material so as not to damage the surface of the optical disc 8 even if it comes into contact with the surface of the optical disc 8.

In the present invention, the surface of the optical disk 8 is cleaned by moving the cleaning pad 5 in the radial direction of the optical disk 8 while lightly touching the surface of the optical disk 8 (contact cleaning operation). is arrow 2 in Figure 1
Movement is possible in 6 directions. Also, since it is necessary to store and take out the cartridge type optical disk 25, the cleaning pad section 23 is located at the arrow 27.
It is also possible to move vertically. The mechanism for moving the cleaning pad 23 will be explained.

The cleaning pad 5 is fixed to a pad fixing plate 4, and the pad fixing plate 4 is connected to the knob fixing plate 2 by a support 6. A knob 3 is attached to the knob fixing plate 2. The knob 3 is processed into a shape that makes it easy to hold the knob 3 by hand and operate it in the horizontal direction 26 or the vertical direction 27.

A sectional view taken along line A-A' in FIG. 1 is shown in FIG. As shown in FIG. 2, the cleaning pad portion 23 is lightly fixed to the outer wall 1 of the cleaning device by a sliding plate 11 and a spring 10, and an optical disk 8 is attached to the outer wall 1 of the cleaning device.
A guide groove is provided at a position opposite to the radial direction of the cleaning device, and by holding the knob 3 by hand and operating it in the direction of the arrow 26, the knob fixing plate can be easily moved along the outer wall 1 of the cleaning device.

The sliding plate 11 can be moved horizontally along the guide groove of the outer wall 1 of the cleaning device, but cannot be moved vertically. Therefore, the pad fixing plate, which has one end fixed to the sliding plate 11 and the other end of the spring 10, is movable in the vertical direction 27 within the elastic range of the spring.

FIG. 1 is a cross-sectional view of the knob 3 held in the hand and pushed in until the cleaning pad 5 lightly touches the optical disk 8, so the spring 10 is stretched in the vertical direction.

When the knob 3 is released, the spring 10 contracts and the cleaning pad portion 23 floats up as shown in FIG. FIG. 3 is a sectional view for explaining a state in which the cleaning pad portion 23 is floating.

A sectional view taken along line BB' in FIG. 3 in this state is shown in a sectional view in FIG. 4. (The numbers and symbols used in each figure are common to each figure.) The cross section taken along line C-C' in FIG. 4 is shown in the cross-sectional view of FIG. 5.

In FIG. 5, one side 28 of the pad fixing plate 4 parallel to the horizontal movement direction 26 is provided with teeth.

The teeth of the pad fixing plate 4 are the cleaning pad part 2.
3 meshes with the gear 12 at the floating position, and as the pad fixing plate 4 moves in the horizontal direction 26 in FIG. 5, the gear 12 rotates around the shaft 15. The rotation of the gear 12 is transmitted to the pulley 13 to which the gear 12 is fixed, and the rotation of the pulley 13 is transmitted to the belt 2.
1 to the pulley 18. Another pulley 19 is fixed to the shaft 20 to which the pulley 13 is fixed, and the rotation of the pulley 19 is transmitted to the pulley 16 by a belt 22. The rotation of the pulley 16 is transmitted to the rotational drive transmission section 9 fixed on the same axis, and further transmitted to the optical disk 8. The shaft 15 of the gear 12 is attached by a bearing 14 to the outer wall 1 of the cleaning device.

The teeth of the pad fixing plate 4 and the gear 12 mesh only when the cleaning pad section 23 is floating, and do not mesh when it is pushed in. Therefore, when the knob 3 is moved in the horizontal direction 26 with the cleaning pad section 23 floating (non-contact state),
The optical disk 8 rotates depending on the distance traveled.
Since the distance that can be moved in one operation is limited, the rotation angle of the optical disk is a stepwise motion. When the part of the optical disc 8 that requires cleaning comes to the position of the cleaning pad 5, stop the rotation of the optical disc 8, hold the knob 3 in your hand, and move the cleaning pad part 23 until the cleaning pad 5 is in position. If you push it in until it lightly touches the surface of the disk (in contact) and repeat the action of moving it in the horizontal direction 26,
The portion of the surface of the optical disk that is in contact with the cleaning pad 5 is cleaned. The entire surface of the optical disk 8 is cleaned by sequentially cleaning positions at arbitrary rotational angles of the optical disk. Although this embodiment describes the case of a cartridge-type optical disk with single-sided recording/reproduction, the present invention can be similarly implemented in the case of a cartridge-type optical disk with double-sided recording/reproduction.

Further, the design can be changed or functions can be freely added within the range that includes the constituent elements of the present invention.

[Effect of idea]

By using the configuration of the present invention, it is possible to radially clean the surface of an optical disk housed in a cartridge. By cleaning in the radial direction, if any scratches occur during the cleaning operation, most of the scratches will be continuous in the radial direction and not in the circumferential direction. Therefore, when recording and reproducing in the circumferential direction and using an error correction method such as DIRC, these radial scratches are ignored, and the radial scratches have almost no effect on the recording/playback characteristics. I won't give it.

Therefore, by using the cartridge type optical disk cleaning device of the present invention, it becomes possible to clean the cartridge type optical disk to a good condition.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a cartridge-type optical disk cleaning device according to an embodiment of the present invention, with a cleaning pad portion pushed in. This cross section is taken along a plane that includes the center line of rotation of the optical disk and the direction of movement of the cleaning pad that moves in the radial direction. FIG. 2 is a sectional view taken along line A-A' in FIG. FIG. 3 is a cross-sectional view of the state in which the cleaning pad section in FIG. 1 has been changed to a floating state. FIG. 4 is a sectional view taken along line BB' in FIG. 3. FIG. 5 is a sectional view taken along line CC' in FIG. 4. 1... Outer wall of the cleaning device, 2... Knob fixing plate, 3... Knob, 4... Pad fixing plate, 5...
Cleaning pad, 6... Support, 7... Cartridge, 8... Optical disk, 9... Rotational drive transmission unit, 10... Spring, 11... Sliding plate, 12...
Gear, 13... Pulley, 14... Bearing, 15...
...Axis, 16...Pulley, 17...Axis, 18...
Pulley, 19...Pulley, 20...Shaft, 21
... Belt, 22 ... Belt, 23 ... Cleaning pad section, 24 ... Cartridge opening,
25... Cartridge type optical disk, 26... Horizontal direction, 27... Vertical direction, 28... Side.

Claims (1)

[Claims for Utility Model Registration] 1. When cleaning the surface of an optical disk of a cartridge type optical disk, a contact cleaning operation is performed by moving a cleaning pad approximately linearly in the radial direction of the optical disk on the surface of the optical disk. A cartridge-type optical disk cleaning device is provided with a motion transmitting section that can arbitrarily repeat stepwise movement of the rotation angle of the optical disk. 2. The nuclear motion transmission section is connected to the cleaning pad;
When the cleaning pad and the optical disk are in a non-contact state and the cleaning pad moves linearly, the optical disk performs a step-by-step rotational movement, and when the cleaning pad and the optical disk are in contact with each other, the cleaning pad moves linearly. A cartridge-type optical disk cleaning device according to claim 1, characterized in that the optical disk is configured such that the optical disk cannot perform step-by-step rotational movement.