JP3377189B2 - Disk cleaning mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cleaning mechanism for removing dust adhering to a recording portion of a disk by static electricity generated by a brush for cleaning.

[0002]

2. Description of the Related Art Generally, when dust or dirt adheres to a disk, there is a problem such as focus loss during loading. Therefore, as a conventional disk cleaning mechanism, for example, there is a disk dust removing device described in Japanese Utility Model Laid-Open No. 58-135019. This is shown in Figure 2 (a).
As shown in (b), the pickup holder 10 that holds the pickup 104 of the player 101 that reproduces the signal recorded on the disc 102 by the pickup 104.
5 is provided with a brush-like body 107 for accommodating dust adhering to the signal recording surface of the disc 102 when reproducing the signal from the disc 102. However, in this case, since the brush-like body 107 is brought into contact with the signal recording surface of the disc 102 to contain the dust on the signal recording surface of the disc 102, scratches due to the brush-like body on the signal recording surface of the disc 102 are caused. There was a problem that it might occur.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and removes dust, dirt, etc. adhering to the recording portion of the lower surface of the disc during reproduction without damaging the recording portion. It is an object of the present invention to provide a disk cleaning mechanism that can be cleaned by means of cleaning, and can reduce problems such as focus loss due to dust and dirt on the recording portion of the disk.

[0004]

In order to solve the above-mentioned problems, the present invention according to claim 1 provides an upper surface of a pickup portion which is provided on the lower side of a rotationally driven disk and moves in the radial direction of the disk. On one side, a brush body having a brush section at the upper end is erected, and a vertical movement mechanism for vertically moving the pickup section is provided on the lower surface side of the pickup section.
When the brush body erected on the pickup section is located below the non-recording section at the center of the disc,
By moving the pickup portion upward by the vertical movement mechanism and rotating the disc while keeping the brush portion of the brush body in contact with the non-recording portion in the central portion of the disc, static electricity is applied to the brush portion. When the brush body is located below the recording portion formed from the outer peripheral end portion of the non-recording portion of the disc toward the outermost peripheral end side, the vertical movement mechanism lowers the pickup portion slightly. By moving to the side, the brush portion of the brush body is located in the vicinity of the recording portion of the lower surface of the disc,
Due to the static electricity generated in the brush portion, the dust attached to the lower surface of the disk is moved and attached to the brush portion side,
It is characterized in that dust is removed from the lower surface of the disk for cleaning. The invention according to claim 2 is characterized in that the vertical movement mechanism is composed of a rotary cam that is in contact with the lower surface of the pickup portion.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a disk cleaning mechanism according to the present invention will be described below with reference to the drawings. FIG. 1 shows the internal structure of a disk device equipped with a disk cleaning mechanism according to an embodiment of the present invention.
(A) is a schematic front view showing a state in which the recording surface of the disc is cleaned, and (b) shows the brush surface of the brush body in contact with the non-recording surface of the disc, and the brush surface is charged with static electricity for dust removal. It is a schematic front view which shows the state at the time of making it generate | occur | produce.

As shown in FIGS. 1 (a) and 1 (b), the disk cleaning mechanism of this embodiment has a disk 3 below the disk 3 mounted on the rotary shaft 2 of the drive motor 1 and driven to rotate. Pickup part 4 moving in the diametrical direction
Is provided on one side of the upper surface of the pickup unit 4,
A brush body 5 having a brush portion 51 at the upper end is erected. Further, on the lower surface side of the pickup section 4, a vertical movement mechanism including a rotary cam 6 for vertically moving the pickup section 4 is provided.

Then, as shown in FIG. 1B, when the brush body 5 erected on the pickup section 4 is located below the non-recording section 31 at the center of the disk 3, it comprises a rotary cam 6. The pick-up unit 4 is moved upward by the vertical movement mechanism to bring the brush unit 51 of the brush body 5 into contact with the non-recording unit 31 of the rotating disc 3 to bring the brush unit 5 into contact.
1. Generate static electricity. From this state, as shown in FIG. 1A, when the pickup unit 4 moves to the right side in the drawing and the brush body 5 is located below the recording unit 32 of the disk 3, the rotating cam 6 is formed. The pick-up unit 4 is moved slightly downward by the vertical movement mechanism so that the brush unit 51 of the brush body 5 is positioned near the recording unit 32 on the lower surface of the rotating disk 3 and generated by the brush unit 51. Also, the dust on the lower surface of the disk 3 is moved and attached to the brush portion 51 side by the static electricity to remove the dust on the lower surface of the disk 3 for cleaning.

Therefore, according to the disk cleaning mechanism of the present embodiment, the brush portion 51 of the brush body 5 where static electricity is generated is located on the lower surface of the desk 3 in the vicinity of the recording portion 32, and the brush portion 51 is moved to the disk. Recording part 3 on the underside of 3
Since the dust adhering to the lower surface of the disk 3 can be removed by the static electricity of the brush portion 51 without touching the disk 2,
It is possible to remove dust and dirt adhering to the recording portion 32 during playback without damaging the recording portion 32 on the lower surface of the disk, and to clean the recording portion 32, thereby defocusing the recording portion 32 of the disk 3 due to dust and dirt. It is possible to reduce problems such as Further, since the rotary cam 6 is used as the vertical movement mechanism, the pickup unit 4 can be reliably moved up and down, and the brush body 5 erected on the pickup unit 4 can be accurately moved up and down. The structure can be simplified and the cost can be reduced.

[0009]

As described above, according to the first aspect of the present invention, the brush portion of the brush body erected on one side of the upper surface of the pickup portion is moved by the movement of the pickup portion and the vertical movement mechanism. The brush is brought into contact with the non-recording area at the center of the disc to generate static electricity, and in this state the pickup is moved and the brush body is moved slightly downward by the vertical movement mechanism, Since it is located near the recording unit, dust and dirt adhering to the recording unit on the lower surface of the disc is attached to the brush unit side by static electricity of the brush unit to remove and clean it.
Dust and dirt adhering to the recording section can be removed without the brush section coming into contact with the recording section on the lower surface of the disc, and dust or dirt etc. adhering to the recording section can be reproduced without damaging the recording section on the lower surface of the disc. It can be removed and cleaned, and defects such as focus loss due to dust and dirt on the recording portion of the disc can be reduced.

According to the second aspect of the present invention, since the rotating cam contacting the lower surface of the pickup portion constitutes the vertical movement mechanism, the pickup portion can be surely moved up and down and is erected on this pickup portion. The brush body can be accurately moved up and down, the structure can be simplified, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 shows an internal structure of a disk device including a disk cleaning mechanism according to an embodiment of the present invention, (a) is a schematic front view showing a state when a recording surface of a disk is cleaned, and (b) is a view. FIG. 4 is a schematic front view showing a state in which the brush surface of the brush body is brought into contact with the non-recording surface of the disc to generate static electricity for dust removal on the brush surface.

FIG. 2 shows a conventional disc dust removing device, (a)
Is a plan view thereof, and (b) is a side view thereof.

[Explanation of symbols]

3 discs 31 Non-recording section 32 recording section 4 Pickup part 5 brush body 51 Brush section 6 Rotating cam (vertical movement mechanism)

Claims (2)

(57) [Claims] 1. A brush body having a brush section at its upper end is erected on one side of an upper surface of a pickup section provided on the lower side of a rotationally driven disk and moving in the diametrical direction of the disk. An up-and-down moving mechanism for vertically moving the pickup section is provided on the lower surface side of the disk, and when the brush body erected on the pickup section is located under the non-recording section at the center of the disk, the up-and-down movement is performed. The pickup unit is moved upward by a mechanism so that the brush portion of the brush body becomes the non-recording portion at the center of the disc.
By rotating the disc while in contact
The static electricity is generated on the brush portion Te, outermost end from an outer peripheral end portion of the brush body is the non-recording portion of the disc
When it is located below the recording section formed toward
By moving the pickup portion slightly downward by the vertical movement mechanism, the brush portion of the brush body is positioned in the vicinity of the recording portion on the lower surface of the disk, and static electricity generated by the brush portion causes A disk cleaning mechanism, characterized in that dust adhered to the lower surface of the disk is moved and adhered to the brush portion side to remove the dust on the lower surface of the disk for cleaning. 2. The disk cleaning mechanism according to claim 1, wherein the vertical movement mechanism is composed of a rotary cam that is in contact with the lower surface of the pickup unit.