KR100194199B1 - Optical pickup objective lens cleaning disc and objective lens cleaning method - Google Patents

Abstract

The present invention relates to a disc for cleaning an optical pickup objective lens and a cleaning method, and in particular, a predetermined portion of the front surface of the disc including a portion capable of contacting an objective lens of the optical pickup can be sufficiently contacted when the objective lens is focused. The cleaning material having a thickness of a degree is detachably attached and the insertion position indicator is attached to the back. In addition, the method of the present invention is detachably attached to a predetermined portion of the front surface of the disk including a portion that can be in contact with the objective lens of the optical pickup, the cleaning material having a thickness enough to allow sufficient contact during the focusing operation of the objective lens. And applying a cleaning solution to the portion of the cleaning disk having the insertion position indicator attached to the rear surface: the front surface of the cleaning disk to which the cleaning liquid is applied is directed downward, and the cleaning liquid is applied to the objective lens of the optical pickup. Mounting the cleaning disc on a tray of the optical disc player so as to be located in the; Mounting a washing disk mounted on the tray on a turntable; And focusing the optical pickup at least three times from below the mounted washing disk.

Description

Optical pickup objective lens cleaning disc and objective lens cleaning method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup objective lens cleaning disc and a cleaning method, and more particularly, to an optical pickup objective lens cleaning disc and a cleaning method capable of safely washing an upper surface of an objective lens without generation of static electricity.

In general, the optical disc player approaches the objective lens to the optical disc in order to read data from the optical disc, performs focus adjustment to form a spot of laser light on the recording surface, and when the focus adjustment is completed, receives the light reflected from the recording surface while rotating the disk. The recorded data is played back. Therefore, when the amount of light that has passed through the objective lens is reduced, it becomes difficult to receive sufficient reflected light, resulting in a severe data error or a state in which data cannot be reproduced. In general, since the objective lens of the optical disc player is close to the rear surface of the optical disc, when the dust or impurities on the optical disc fall off and accumulate on the upper surface of the objective lens, the amount of light passing through the objective lens is reduced. To prevent this, after the predetermined time has elapsed, the upper surface of the objective lens should be cleaned with a brush or cotton swab. However, this cleaning process must be performed after disassembling the set of the optical disc player, so an expert, such as an after-sales service technician, must perform the after-sales service. In addition, since the optical pickup part is very weak to static electricity by a very fine and delicate circuit configuration, careful attention to static electricity has to be paid at the time of cleaning.

Therefore, in the related art, as shown in FIG. 1, a cleaning disk having a cleaning brush 12 formed on the rear surface of the optical disk 10 has been introduced. Therefore, in the conventional cleaning method, when the cleaning disk is mounted in the player, the presence of the disk is detected by the focusing operation of the optical pickup, and then the spindle motor is driven to rotate the optical disk while the objective lens of the optical pickup is used to clean the disk. When moved to the position (12) is formed, the upper surface of the objective lens is washed by the rotation of the cleaning brush 12.

However, in the conventional method, static electricity is generated by friction between the objective lens and the brush by rotating the cleaning brush, and the static electricity may damage the circuit part of the optical pickup. In addition, since the cleaning brush rotates at high speed and rubs with the surface of the objective lens, as the number of washing increases, there is a concern that the surface of the objective lens may be scratched by impurities attached to the cleaning brush. In addition, since the disk rotation operation is performed in conjunction with the focusing operation, when the cleaning brush is formed in a large area of the disk along the circumference of the optical pickup (donut type), the focusing operation is not achieved and thus the spindle rotation operation is stopped. As a result, as shown in the drawing, only a very small area is formed to form a brush for cleaning, and thus, there is a problem in that the actual washing operation is not achieved. In addition, since the transfer operation of the optical pickup is linked, there is an inconvenience in consideration of system design.

Accordingly, an object of the present invention is to provide an optical pickup objective lens cleaning disk and a cleaning method which can be automatically cleaned by the focusing operation of the optical pickup without rotating the cleaning disk to solve the problems of the prior art. have.

In order to achieve the above object, the disk of the present invention includes a cleaning material having a thickness sufficient to allow sufficient contact with a predetermined portion of the front surface of the disk including a site capable of contacting the objective lens of the optical pickup. It is detachably attached and is characterized in that the insertion position is attached to the back.

In addition, a cleaning agent having a thickness sufficient to be sufficiently contacted during the focusing operation of the objective lens is attached to a predetermined portion of the front surface of the disk including a portion capable of contacting the objective lens of the optical pickup of the present invention, and the rear surface is detachably attached. The step of applying a cleaning liquid to the portion of the washing disk attached to the insertion position indicator; Mounting the cleaning disc on the tray of the optical disc player so that the front surface of the cleaning disc to which the cleaning solution is applied is faced down and the area to which the cleaning solution is applied is located on the objective lens of the optical pickup; Mounting a washing disk mounted on the tray on a turntable; And focusing the optical pickup at least three times from below the mounted washing disk.

1 is a view showing a configuration of a cleaning disk of a conventional optical pickup objective lens.

2 is a view showing the configuration of the front and rear of the optical pickup objective lens cleaning disk according to the present invention.

3 is a diagram showing a relationship between an optical disc and an optical pickup mounted on a turntable of an optical disc player.

4 is an enlarged view of portion A of FIG.

Hereinafter, with reference to the accompanying drawings will be described in more detail the present invention.

Referring to FIG. 2, the optical pickup objective lens cleaning disc according to the present invention focuses the target lens on a predetermined portion of the front surface of the disc (FIG. 2a) including a portion capable of contacting the objective lens of the optical pickup. Cleaning member 20 having a thickness sufficient to be sufficiently contacted at a time, for example, 3 to 5 millimeters, such as a sponge, such as a sponge, having sufficient elasticity upon contact with an objective lens, for example, on a double-sided adhesive tape. It is attached so that attachment and detachment are possible, and the insertion position indication label 22 is attached to the back surface (FIG. 2B). In addition, the through hole 24 is formed in the center is inserted to align the position.

Here, the cleaning member 20 is attached to a portion corresponding to the position of the objective lens (parts A and B in the drawing) when the optical pickup is at the initial position, that is, at the position at the innermost circumference of the recording surface in the case of CD. The cleaning member 20 shown in FIG. 2, which is an embodiment of the present invention, has a shape in which the cleaning member corresponds to a through hole into which the assembly of the optical pickup and the transfer structure formed in the optical disc tray is inserted. However, the present invention is not limited thereto, but it is also possible to attach the cleaning member in the shape of a donut to an area of the front surface corresponding to the recording surface except for the portion 26 facing the turntable. Rather than attaching circularly to the site where the objective lens is located, it is preferable to attach to a large enough area so that the cleaning member exists in the objective lens site even if it is roughly placed.

3 shows the positional relationship between the optical disk and the optical pickup, wherein 10 is a cleaning disk, 30 is an optical pickup, 40 is a tray, 50 is a spindle, 60 is a turntable, and 70 is a spindle motor.

4 is an enlarged portion A of FIG. 3, 20 is a cleaning member, and 32 is an objective lens. d represents the distance in the initial state between the disk and the objective lens 32, the upper surface of the turntable 60 and the objective lens 32. This is 3 millimeters for a CD.

In the exemplary embodiment of the present invention, the case of the disk type is illustrated, but it is also possible to configure a polygonal structure in which a spindle insertion hole is formed at the center.

In addition, it is also possible to perform a post-wash experiment by recording and regenerating predetermined data on the back recording surface to test the degree of washing of the objective lens after washing.

The cleaning method using the washing disk of the present invention configured as described above is as follows.

First, the cleaning member 20 having a thickness sufficient to allow sufficient contact with a predetermined portion of the front surface of the disc including a portion that can contact the objective lens 32 of the optical pickup 30 during the focusing operation of the objective lens. Is applied detachably, and the back surface of the cleaning disk is coated with the cleaning liquid after the cleaning liquid is applied to the portion of the cleaning disk having the insertion position label 22 attached thereto. The cleaning disc is mounted on the tray 40 of the optical disc player in an open state so that the lens faces the objective lens, that is, the object lens is faced, and a portion to which the cleaning liquid is applied is positioned on the objective lens of the optical pickup. As a result, the tray is transferred in a closed state, and the washing disk mounted on the tray 40 is mounted on the turntable 60. In the optical disc player, a focusing operation is performed. At least three or more times of focusing the optical pickup is performed from below the mounted washing disc. By the focusing operation, as shown in FIG. 4, the objective lens is moved up and down three to five times to naturally come into contact with the cleaning member 20 to which the cleaning liquid is applied, and dry impurities deposited on the upper surface of the objective lens 32 are washed. It is to be removed by the member 20. At this time, since the focusing is not made, the rotation operation of the disk is not made.

When this operation is completed, open the tray again and place the cleaning disc on the tray with the part B of FIG. 2a positioned at the position of the objective lens, and then close the tray. The cleaning disc is mounted on the turntable. Subsequently, due to the focusing operation of the optical pickup, the B portion and the upper surface of the objective lens come into contact with each other three to five times. Therefore, the wet cleaning is first performed by the A site to which the washing liquid is applied, and then the dry cleaning is performed by the B site, thereby achieving the cleaning of the objective lens.

As described above, the present invention removes impurities such as dust on the objective lens by vertically moving the object lens by focusing movement of the objective lens without rotating the cleaning disk, so that there is no static electricity during the cleaning, and the surface of the objective lens is not generated. There is an advantage that can be washed clean.

Claims (3)

A cleaning material having a thickness sufficient to be sufficiently contacted during the focusing operation of the objective lens is detachably attached to a predetermined portion of the front surface of the disc including a portion capable of contacting the objective lens of the optical pickup, and an insertion position indication is provided on the back side. Optical pickup objective lens cleaning disk, characterized in that attached. The optical pickup objective lens cleaning disk according to claim 1, wherein data for testing the degree of cleaning after the cleaning is recorded on the recording surface of the cleaning disk. A cleaning material having a thickness sufficient to be sufficiently contacted during the focusing operation of the objective lens is detachably attached to a predetermined portion of the front surface of the disk including a portion capable of contacting the optical pickup objective lens, and an insertion position indication is attached to the rear surface thereof. Applying a washing liquid to the portion of the prepared washing disk; Mounting the cleaning disc on the tray of the optical disc player so that the front surface of the cleaning disc to which the cleaning solution is applied is faced down and the area to which the cleaning solution is applied is located on the objective lens of the optical pickup; Mounting a washing disk mounted on the tray on a turntable; And performing focusing of the optical pickup at least three times from the lower side of the mounted cleaning disk.