JP3677370B2 - Lens cleaner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lens cleaner for cleaning (hereinafter referred to as cleaning) an objective lens of an optical head of an optical disk apparatus for recording / reproducing information on / from an optical disk.
[0002]
[Prior art]
In recent years, optical discs that record and reproduce large amounts of information have attracted attention because of their high recording density, short search access time, and high productivity. An optical head for recording and reproducing such an optical disk objective lens is finely small variation Ri by the electromagnetic force of the moving coil (MC) type or moving magnet (MM) scheme for converging a light spot on an optical disk Focusing and tracking. Therefore, in general, an objective lens has a magnetic body in its movable part.
[0003]
By the way, unlike a magnetic hard disk or the like, an optical disk device is difficult to form a sealed structure because of a structure that allows easy replacement of a medium. Since the recorded portion is easily soiled and used for a long time, the recording / reproducing characteristics of the signal deteriorate, so it is necessary to periodically clean the objective lens and the like.
[0004]
For this reason, a lens cleaner as shown in FIG. 6 (see Japanese Patent Laid-Open No. 1-43386) is known.
[0005]
FIG. 6 shows a configuration of a conventional lens cleaner, which is composed of a disc 61 and a cleaning member 62 provided on a part of the disc 61. When the disc 61 is mounted on an optical disc apparatus in the same manner as a normal disc, The cleaning member 62 rotates and rubs and cleans the surface of the objective lens of the optical disc apparatus.
[0006]
[Problems to be solved by the invention]
However, although a high cleaning effect is required for the lens, the conventional lens cleaner has a very weak force that the cleaning member is pressed against the objective lens, and has a cleaning effect when it is very dirty. In some cases, it was insufficient.
[0007]
An object of the present invention is to provide a lens cleaner that can be easily cleaned with a simple configuration and has a high cleaning effect.
[0008]
[Means for Solving the Problems]
The present invention in order to solve this problem, a cleaning member is provided on a surface facing the one surface a and the objective lens of the disc, a lens holder in the vicinity of the front surface a and the cleaning member on the side provided with the cleaning member The magnetic material for attracting is provided.
[0009]
As a result, the magnetic body provided in the vicinity of the cleaning member attracts the magnetic body of the lens holder of the optical disc apparatus, so that the force with which the cleaning member is pressed against the objective lens is increased, and a high lens cleaning effect is obtained.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, the cleaning member is provided on a surface facing the one surface a and the objective lens of the disc, magnetic near the front surface a and the cleaning member on the side provided with the cleaning member Since the magnetic body of the lens holder of the optical disc apparatus is attracted by the magnetic body provided in the vicinity of the cleaning member, the lens cleaner has an action of cleaning while attracting the objective lens to the cleaning member.
[0011]
The invention according to claim 2 is the lens cleaner according to claim 1, wherein the magnetic material is provided over a range of a constant rotation angle of the disk, and the lens holder of the optical disk apparatus is provided with the magnetic material provided within the range of the constant rotation angle of the disk. Since the time for attracting the magnetic material can be lengthened, the attracting effect of the objective lens is high, and the cleaning is performed while attracting the objective lens to the cleaning member.
[0012]
The invention according to claim 3 is the lens cleaner according to claim 1, wherein the magnetic material is provided over one rotation range of the disk, and the magnetic material of the lens holder of the optical disk apparatus is provided by the magnetic material provided in one rotation range of the disk. Since it can be attracted continuously, the effect of attracting the objective lens is high, and it has the effect of cleaning while attracting the objective lens to the cleaning member.
[0013]
A fourth aspect of the present invention is the lens cleaner according to the first, second, or third aspect in which only the magnetic body and the cleaning member are configured without a disk. It has the same effect as Item 2 and Claim 3.
[0014]
The invention according to claim 5 is the lens cleaner according to claim 1 in which the disk is made of a magnetic material. Since the magnetic material of the lens holder can be continuously attracted by the magnetic material, the effect of attracting the objective lens is high. The lens is cleaned while being attracted to the cleaning member.
[0015]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
(Embodiment 1)
FIG. 1A is a perspective view of a lens cleaner according to Embodiment 1 of the present invention. In FIG. 1, a cleaning member 13 is provided on a disk 11 and a magnetic body 12 is attached in the vicinity of the cleaning member 13. This is for attracting the magnetic body 15 of the lens holder of the optical disk device, and is made of iron or a magnet. As a result, the objective lens 16 is attracted to the cleaning member 13, and the turntable 17 rotates, whereby the objective lens 16 is cleaned.
[0016]
(Embodiment 2)
FIG. 2 is a perspective view of the lens cleaner according to the second embodiment. In FIG. 2, a magnetic body 22 and a cleaning member 23 are attached to the disk 21, and the magnetic body 22 is provided over a range of a certain rotation angle of the disk 21. The time for attracting the magnetic material of the lens holder of the optical disk device, that is, the time for attracting the objective lens is kept long, and is made of iron or magnet.
[0017]
(Embodiment 3)
FIG. 3 shows a perspective view of the lens cleaner according to the third embodiment. In FIG. 3, a magnetic body 32 and a cleaning member 33 are attached to the disk 31, and the magnetic body 32 is provided over one rotation range of the disk of the disk 31. In this case, the magnetic material of the lens holder of the optical disk device is continuously attracted, that is, the objective lens is continuously attracted, and is made of iron or magnet.
[0018]
(Embodiment 4)
FIG. 4 is a perspective view of the lens cleaner according to the fourth embodiment. In FIG. 4, a cleaning member 42 is attached to one side of a sheet-like magnetic body 41, and an adhesive is applied as a sticking means to the other side. The same effect can be obtained by attaching the disc to the disc with an adhesive.
[0019]
Note that the pasting means does not have to be completely pasted like an adhesive, but may be temporarily stuck. The same effect can be obtained even if the magnetic body 41 and the cleaning member 42 are separately attached to the disk.
[0020]
(Embodiment 5)
FIG. 5 shows a perspective view of the lens cleaner according to the fifth embodiment. In FIG. 5, a cleaning member 52 is attached to a disk 51 made of a magnetic material so that the magnetic material of the lens holder of the optical disk apparatus is continuously attracted. It is a thing.
[0022]
In addition, the cleaning member includes a synthetic resin formed into short hairs, a synthetic resin fiber shortly planted, etc., as long as it can be cleaned without pressing the objective lens and causing damage to the objective lens. It is not limited to these.
[0023]
【The invention's effect】
As described above, according to the present invention, since the magnetic body of the lens holder of the optical disk apparatus is attracted by the magnetic body provided on the disk, the objective lens is cleaned while being attracted to the cleaning member. High cleaning effect can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a lens cleaner according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a lens cleaner according to the second embodiment. FIG. 3 shows a lens cleaner according to the third embodiment. FIG. 4 is a perspective view showing a lens cleaner according to the fourth embodiment. FIG. 5 is a perspective view showing the lens cleaner according to the fifth embodiment. FIG. 6 is a perspective view showing a conventional lens cleaner. Explanation of]
11 Disk 12 Magnetic body 13 Cleaning member 14 Lens holder 15 Lens holder magnetic body 16 Objective lens 17 Turntable 21 Disk 22 Magnetic body 23 Cleaning member 31 Disk 32 Magnetic body 33 Cleaning member 41 Magnetic body 42 Cleaning member 51 Disk 52 Cleaning member 61 Disc 62 Cleaning member

Claims (5)

Magnetic for attracting the disk, and the cleaning member provided on one surface a and the surface facing the objective lens of the disc, a lens holder which is provided in the vicinity of the front side a and the cleaning member on the side provided with the cleaning member A lens cleaner with a body.   2. The lens cleaner according to claim 1, wherein a magnetic material is provided over a range of a constant rotation angle of the disk.   2. The lens cleaner according to claim 1, wherein a magnetic material is provided over one rotation range of the disk.   The lens cleaner according to any one of claims 1 to 3, wherein only the magnetic body and the cleaning member are configured without a disk and have means for sticking to the disk.   2. The lens cleaner according to claim 1, wherein the disk is made of a magnetic material.

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