JPH02304727A - Objective lens cleaning device for optical disk device and cleaning method used for the same - Google Patents

Abstract

PURPOSE:To operate based on a simple structure and operation and to hardly generate a fault by providing the cleaner of an objective lens on a position facing to the objective lens when the optical disk is ejected. CONSTITUTION:In an unloading state that the eject operation of an optical disk 1 is executed, the surface of an objective lens 5 is brushed by a cleaner brush and the stuck dust or stain is removed by rocking the objective lens 5 since the cleaner 7 fitted at the lower part of a cartridge pocket 6 is moved to the position of the objective lens 5. When a cartridge 2 where the cleaner brush is fitted, is inserted to the cartridge pocket 6 and a loading state is set, the stuck dust or stain can be removed by rocking the objective lens 5 since the objective lens 5 is positioned just under the cleaner 7. Thus, it is operated based on a simple structure and operation and the fault hardly occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an objective lens cleaning device suitable for a maintenance-free optical disk device.

[Conventional technology]

An optical disc device configured as shown in Fig. 5 is capable of optically writing or reading information onto or from a spiral track of an optical disc by irradiating a light beam through an objective lens onto the spiral or concentric track of the optical disc, and records high-density information. Because it can be played back, it is used as a data storage device. However, in the above-mentioned optical disc device, since the optical disc is inserted into and taken out from the disc tray or cart, the objective lens in the irradiation unit is open when recording and reproducing information, and as a result, the objective lens in the irradiation unit is open, and dust and dirt may adhere to it. It was in a comfortable condition. For this reason, JP-A-62-
An objective lens cleaning device as described in Japanese Patent No. 24449 has been proposed.

In the above-mentioned conventional technology, a cleaning arm with a brush attached to the tip is rotatably attached to a single point as a fulcrum, and is moved in conjunction with the loading operation of the disk tray, so that the brush attached to the cleaning arm cleans the surface of the objective lens. Stroke,
Remove dirt from the surface of the objective lens (like a busy one).

[Problem to be solved by the invention]

In the above conventional technology, the brush is moved to the surface of the objective lens in conjunction with the objective lens provided at a fixed position only when the disk tray is loaded, and after the disk tray is loaded, the brush is moved again to the objective lens. It is necessary to be out of the position of the lens. For this reason, it is provided with a cleaning arm that is supported at one point and rotates, and a wire that allows the cleaning arm to move along the IC while being suspended. In order to ensure that these movements are performed in conjunction with the loading operation of the disc tray,
The above-mentioned conventional technology has a problem in that it has a complicated structure and requires complicated operations, which may cause a failure.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an objective lens cleaning device which operates based on simple structure and operation and is free from malfunctions. An object of the present invention is to provide a cleaning method that can be used for.

[Means to solve the problem]

The above object is achieved by providing a cleaning tool for the brush tube at a position facing the objective lens of the cart 9 and the object lens when ejecting the optical disk, and by swinging the objective lens in contact with the cleaning tool.

Alternatively, this can be achieved by attaching a cleaning tool to the cartridge, inserting the cartridge into the cart and swinging the objective lens in contact with the cleaning tool.

[Effect]

According to the above means, in the unloading state where the optical disc is ejected, the cleaning tool such as a brush attached to the bottom of the cart moves to the position of the objective lens, so that the objective lens cannot be swung. As a result, the surface of the objective lens is rubbed by the brush, and adhering dust and dirt are removed. The movement of the objective lens is a minute movement performed by the actuator, similar to focusing when writing or reading a disk, so a special device is required to swing the objective lens. do not need.

In addition, when a cartridge with a cleaning tool such as a brush attached is inserted into the cart and placed in the loading state, the objective lens is located directly below the cleaning tool, so by swinging the objective lens, it is possible to remove accumulated dust and dirt. can be removed.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an explanatory view, partially cut away, showing a first embodiment of an objective lens cleaning device according to the present invention.

In FIG. 1, reference numeral 2 denotes a cartridge that houses an optical disk 1, and the optical disk 1 is rotated by a spindle motor 3. As shown in FIG. The optical pickup 4 irradiates the optical disc 1 with a laser beam, detects the light reflected from the optical disc 1, and is equipped with an objective lens 5 that can be moved up and down for focusing. Reference numeral 6 denotes a cart 9 receptacle provided in the optical disc device. When the cart 9 2 changes from the unloading state to the loading state, it moves as shown by the arrow, and the optical disc 1 in the cartridge 2 is transferred to the spindle motor 3. Set to . 7
is a brush provided at the lower part of the cart 9 abutment 6; the brush 7 is in contact with the objective lens 5 of the optical pickup 4 in an unloading state in which the cartridge 2 is ejected from the cart 9 abutment 6;

Next, the operation of the optical disc device will be explained with reference to FIG. FIG. 2 is an explanatory diagram of system operation related to FIG. 1.

After turning on the power and starting, it performs initial settings and enters the state of waiting for a disk. At this time, since the force cartridge 6 is in an unloading state, the objective lens 5
can be positioned directly below the brush 7, and the cleaning operation described later is performed here. When the cartridge 2 is inserted into the cart 9 socket 6 and enters the loading state, the leading end of the cart 9 socket 6 moves as shown by the arrow in FIG. 1, and the optical disc 1 is set on the spindle motor 3, loading begins is completed. Next, the optical disc 1 is rotated by the spindle motor 3,
A single laser beam is emitted from the objective lens 5 for focusing and tracking, and recording and reproduction are performed in this state. When an ejection request is made, the rotation of the optical disc 1 is stopped and the cartridge cartridge 6 is
Move it to its original position in the opposite direction to the arrow (Fig. 1), and
Eject cartridge 2. At this point, the disc wait state again occurs, and by moving the optical pink-up 4t and positioning the objective lens 5 directly below the brush 7,
Cleaning is now possible. That is, cleaning can be performed every time the optical disc 1 is replaced as described above.

Next, the cleaning operation will be explained. FIG. 3 is a diagram for explaining the cleaning operation.

First, the optical pickup 4 is positioned directly below the brush 7, and the objective lens 5 is raised and brought into contact with the brush 7.The objective lens 5 is then swung for a predetermined period of time until it reaches the objective lens 5 at t'-1. After that, the objective lens 5 is lowered to complete the cleaning operation. When the objective lens 5 is oscillated, the optical pickup 4 or the cartridge 6 of the cart 9 is further oscillated, thereby further enhancing the nokjeening effect.

The second embodiment of the present invention w! This will be explained using diagram J4.

FIG. 4 is a configuration diagram showing the ratio state when loading is performed and the optical disc 9 is set on the spindle motor 3.

The optical disc 9 is an optical disc equipped with a cleaning brush 7°, and dirt can be removed from the objective lens 5 with the brush 7'. When the spindle motor 3 is rotated in the state shown in FIG.
′ strokes the surface of the objective lens 50,
In this embodiment, the cleaning effect is further enhanced by adding vertical movement and horizontal swinging movement of the objective lens 5 to the above-mentioned cleaning operation. When the cartridge 2 containing the brushed optical disc 9 is inserted into the cartridge boggle 6, the spindle motor 3 is rotated to place the optical pickup in a position where the objective lens 5 can contact the brush of the brushed optical disc 9. Move 4.

Next, the objective lens 5 is raised and swung left and right for a predetermined period of time to remove dirt from the surface, and then lowered to complete the cleaning operation.

Note that when swinging the objective lens 5, the cleaning effect can be further enhanced by swinging the optical pickup 4.

Next, FIG. 5 is a diagram for explaining the operation of the third embodiment of the present invention. The third embodiment is based on the second embodiment shown in FIG.
The vertical movement and horizontal movement of the objective lens 5 in the embodiment described above are incorporated into the focusing operation.

The focusing operation is performed by moving the objective lens 5 up and down, but in this embodiment, left and right rocking is further added to the focusing. Such an operation does not interfere with the original focusing; on the contrary, it facilitates focusing. This is because even if there is a spot on the optical disc 1 where it is difficult to focus due to a disc defect or the like, focusing will be performed over a wide range due to the left and right rocking, which will make it less susceptible to the effects.

In FIG. 5, in the case of the optical disc 1, in which the objective lens 5 is first raised and then further subjected to a swinging operation, focus is normally applied at this point, and the swinging is stopped to complete the focusing operation. In the case of the brushed optical disc 9, the objective lens 5 is cleaned, but since the focus is not applied, the optical pickup 4 is then moved and the focusing operation is performed at another location, that is, the objective lens 5 is cleaned again. conduct. In this way, after cleaning is performed at several locations, the process ends as an error, and the brushed optical disc 9 is ejected. Even in the case of the optical disc 1, if focus is not achieved at the first location, focusing will be attempted at another location, which has the advantage that even if the optical disc has many scratches, it will be easier to focus.

As described above, in this embodiment, the focusing operation directly becomes the cleaning operation, so simply inserting the optical disc 9 with the cleaning tool into the cartridge pocket 6 without performing any special operations depending on the difference in optical discs automatically The objective lens 5 is glued 9- and when it is finished, it is discharged.

Next, FIG. 6 is a perspective view showing the configuration of a fourth embodiment of the present invention.

In the operation explanatory diagram shown in FIG.
It becomes possible to perform gluing. At this time, left and right rocking is added to the vertical focusing movement of the objective lens 5, so as shown in FIG. In addition, since this cleaning method does not utilize the number of rotations of the optical disc 9, unlike cleaning with a brushed optical disc 9, it is suitable for optical disc devices with any number of rotations. In other words, damage to the objective lens 5 due to contact with the brush 7'' at high rotational speeds,
Alternatively, poor cleaning does not occur at low rotation speeds, and there is no need for rotation control to prevent such occurrences.

Furthermore, in the brushed disc 9 described above, there was a problem that the brush 7' was deformed due to its own weight inside the cartridge 2, but in this embodiment, there is no need for the brush 7n to rotate, and the brush 7' is not required to rotate. Because it can be fixed,
Deformation of the brush as described above can be prevented. Moreover, since the brush 7 is structured so that it pops out when the shutter 8 of the cartridge 2 is opened, the brush 7
It is also possible to further improve the cleaning effect by further increasing the degree of adhesion between the lens and the objective lens 5. Furthermore, since the brush 7'', which is a cleaning tool, is fixed, various materials can be used for the cleaning tool 7'', including absorbent cotton and woven cloth, and can be soaked with a cleaning solution such as alcohol. It is also easy to apply to wet cleaning.

As mentioned above, in this embodiment, the focusing operation directly becomes the cleaning operation, so cleaning can be performed automatically by simply inserting the cleaning tool 7° into the cart 9-pocket B without performing any special operations. When it is finished, it will be discharged.

〔Effect of the invention〕

As described above, the objective lens cleaning device for an optical disk device according to the present invention is an objective lens cleaning device for an optical disk device that writes or reads information using light. By installing an objective lens cleaning tool in a position facing the objective lens during ejection, dust and dirt on the objective lens installed in the optical disk drive device can be removed without requiring special structure or operation. Moreover, the user of the optical disk device can use it without any special consideration.
Since the optical pickup can always be kept free of dust and dirt, data errors due to dust adhesion can be prevented.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway explanatory diagram showing a first embodiment of an objective lens cleaning device for an optical disc device according to the present invention, and FIG. 2 is an explanatory diagram of system operation for explaining the operation of the first embodiment. 3 is a diagram for explaining the cleaning operation, FIG. 4 is a block diagram showing the second embodiment of the present invention, FIG. 5 is a diagram for explaining the operation of the third embodiment of the present invention, and FIG. FIG. 6 is a perspective view showing the configuration of a fourth embodiment of the present invention. 1... Optical disc, 2... 9 carts, 5...
Objective lens, 6...Cartridge boget, 7,
7.7...Cleaning tools. Chin eyes Akiotsu eyes

Claims (1)

[Scope of Claims] 1. In an objective lens cleaning device for an optical disc device that uses an objective lens to write or read optical information onto or from an optical disc, a cleaning device for an objective lens of an optical disc device that uses an objective lens to write or read optical information to or from an optical disc, wherein An objective lens cleaning device for an optical disc device, further comprising a cleaning means for cleaning the objective lens at a position facing the objective lens when ejecting the optical disc. 2. The objective lens cleaning device for an optical disc device according to claim 1, further comprising a swinging means for swinging the objective lens when ejecting the optical disc. 3. The objective lens cleaning device for an optical disc device according to claim 2, wherein the swinging means moves the objective lens up and down and swings it left and right. 4. Claim 2 or Claim 3, wherein the swinging means operates during a focusing operation of the objective lens.
An objective lens cleaning device for an optical disc device according to . 5. The objective lens is oscillated by the oscillating means with respect to a cleaning tool provided in a cartridge of the optical disk. A cleaning method used in an objective lens cleaning device for an optical disc device.