JPH11306582A - Lens cleaner for optical pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean excellently even a pickup lens becoming dirty to an illegible extent. SOLUTION: In a lens cleaner fixing lens cleaning members 1, 2 to a disk surface of a disk arranged with a read-in area 3 recorded with information required at time of read-in, the cleaning members 1, 2 are fixed so as to contain the read-in position 4 of the read-in area 3 of the disk, and the cleaning members 1, 2 are occupied with an area smaller than the width of the read-in area 3 in the radial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens cleaner for cleaning a pickup lens of an optical pickup, and more particularly to a lens cleaner for removing foreign substances such as sticky substances and dust particles adhering to a lens surface.

[0002]

2. Description of the Related Art The prior art of this type of lens cleaner is disclosed in Japanese Utility Model Laid-Open No. 62-57931 and Japanese Utility Model Laid-Open No. 1-901.
As disclosed in Japanese Patent Publication No. 69-69, a cleaning tool is arranged at a lead-in position of a lead-in area, and a lens and a cleaning tool are always brought into contact when a disc is mounted on a reproducing apparatus, so that reliable cleaning is performed. There is something to say. However, in such a conventional example, although there is a merit that the cleaning tool and the lens are surely brought into contact with each other even if the lens is so dirty that it cannot be read, the cleaning tool does not cover the entire radial width of the lead-in area. Since the disc is arranged in a size large enough to cause an error, the reproducing apparatus does not determine that the disc is a normal disc, and often stops the reproducing operation after trying to start driving several times. . Therefore, even if the lens is cleaned by the user,
There is a disadvantage that it is difficult to determine that the operation is normal because the device displays an error.

[0003] Even if a program such as audio is recorded as an additional function on a disc, there is a risk that the reproduction function may be stopped before the reproduction thereof, so that no additional value can be added to the disc.

Therefore, as a device which can be used in the same manner as a normal recording disk, a cleaning tool is arranged in a program area or an extended lead-in area other than the lead-in position so as to eliminate errors at the time of lead-in. Those that have become mainstream. In this case, a brush bristle bundle is implanted on the outer periphery side of the lead-in position in the lead-in area, eliminating error factors in the operation at the time of lead-in, and recording and reproducing the added value in the program area in the same way as a normal disc It has become possible.

[Problems to be solved by the invention]

[0005] However, when the cleaning tool is not disposed at the lead-in position as in the above-described conventional example, there is a serious disadvantage when the lens is very dirty.

That is, if the lens is dirty to the extent that it cannot be read, the TOC information in the lead-in area cannot be read normally even if the lens moves to the lead-in position. Absent. Therefore, the movement of the lens is not controlled to the position of the cleaning tool, so that the lens cannot be cleaned.

[0007]

In order to solve the above-mentioned drawback, the present invention provides a cleaning member for cleaning a lens on a disk surface on which a lead-in area in which necessary information is recorded at the time of lead-in is arranged. In the fixed lens cleaner, the cleaning member is
The disk is fixed so as to include the lead-in position of the lead-in area, and the cleaning member is configured to occupy an area smaller than the radial width of the lead-in area.

Further, the present invention provides a lens cleaner in which a plurality of lens cleaning members are fixed to a disk surface on which a lead-in area in which necessary information is recorded at the time of lead-in is arranged. Among them, the first cleaning member is fixed so as to include the lead-in position of the lead-in area of the disk, and occupies an area smaller than the radial width of the lead-in area. Another feature is that the first cleaning member is fixed at a position radially away from the fixing position of the first cleaning member.

[Action]

Therefore, the cleaning member always contacts the lens at the lead-in position at the time of lead-in, so that even if the lens surface is so dirty that the lens cannot be read, the surface of the lens can be cleaned for the time being.

Since the cleaning member occupies a smaller width than the entire area of the lead-in area, information necessary for lead-in is read in the lead-in area other than the area occupied by the cleaning member, and the subsequent operation is executed. Therefore, it is possible to reproduce the value-added information recorded in the program area.

According to the second aspect of the present invention, in addition to the above operation, since the second cleaning member is provided, sufficient lens cleaning can be performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on embodiments. FIG. 1 shows a first embodiment of a lens cleaner according to the present invention. The lens cleaner can be applied to all optical disks such as CD players and CD-ROM players. Is approximately equivalent to

A first cleaning member 1 and a second cleaning member 2 are implanted on the surface of the disk 10, and as is clear from the sectional views of FIGS. Has a smaller number of hair bundles and a smaller perforation for planting than the second cleaning member 2, so that the occupied area on the board is small. Considering the amount of spread of the bristle bundle as a substantial area of each cleaning member, the bristle bundle of the first cleaning member 1 is formed into a shape or material that is difficult to spread, and the height of the bristle bundle is also reduced to the second cleaning member 2. It is also desirable to lower the height, but the spread of the bristle bundle on the tip side is less affected since it is far from the focal point of the pickup lens. Therefore, in the present invention, the area at the root of the plant is defined as the occupied area.

The first cleaning member 1 is arranged such that a pickup lens (not shown) of the main body device is positioned at a lead-in position (disc 1) where the disc is set first and then set.
0 is provided at the innermost periphery of the lead-in area 3 provided on the inner peripheral side. In this case, the perforation for planting does not necessarily need to be opened at the lead-in position. It may be shifted to the inner and outer circumferences.

The lead-in area 3 is information necessary for lead-in of the pickup lens, for example, TOC (Tab).
This is an area in which information of "le of Contents" is repeatedly recorded. The CD player is controlled to always move to the innermost lead-in position 4 of the lead-in area 3 when a CD is set. The lead-in area may be located at the outermost periphery depending on the type of the optical disk. In this case, the lead-in position is located at the outer periphery of the lead-in area.

Therefore, every time a CD is set, the pickup lens and the first cleaning member
Are brought into contact with each other, and at that time, preliminary cleaning is performed. A program area 6 is provided on the outer peripheral side of the lead-in area 3 as necessary. The program area 6 stores music data, ROM data that can be used by a personal computer, and other functions other than the lens cleaning function. As a function, it enhances product value.

In this embodiment, since the second cleaning member 2 is implanted in the program area 6, there is a possibility that a popping sound or the like may occur, but the TOC information in the lead-in area 3 has already been read. There is no problem in control.

Although the first cleaning member 1 has a small amount of hair bundles and is inferior to the second cleaning member 2 in cleaning ability, the region R2 of the lead-in area 3
(Usually about 2 mm) within a region R smaller than the region R2.
Since the pickup lens occupies 11, even if the pickup lens moved to the lead-in position 4 has a malfunction in reading the TOC information due to the influence of the first cleaning member 1 implanted in the lead-in position 4, Since the lead-in area exists at a position other than the occupied region R11 of the first cleaning member 1 and the TOC information is recorded, the TOC information is recorded.
The information will be read reliably. The occupied area R11 is an area in the lead-in area 3, and the first cleaning member 1 may have an area R12 on the inner peripheral side of the lead-in position 4.

The second cleaning member 2 is implanted at a plurality of locations apart from the first cleaning member 1 in the radial direction, so that the pickup lens moves to the program area 6 after reading the TOC information. At the same time, cleaning is performed. Since the second cleaning member 2 has a larger number of bristle bundles than the first cleaning member 1, it has a sufficient cleaning effect, and the lens cleaning is performed firmly.

It is necessary to secure a space between the second cleaning member 2 and the first cleaning member 1 in the lead-in area 3 at least so that the TOC information can be read by the pickup lens.

Since the first cleaning member 1 is implanted at the lead-in position 4 as described above, the first cleaning member 1 always comes into contact with the pickup lens in any state, so that the reading ability is lost. For a very dirty pickup lens, cleaning will be performed for the time being.

When the dirt is removed by the cleaning, the reading ability is restored, the TOC information recorded in the lead-in area 3 is read, and an error can be avoided.

In actual use, there is a case where cleaning cannot be performed by a single cleaning so that the reading ability is recovered, so it is necessary to repeat setting of the CD several times. If the surface of the pickup lens is cleaned to such an extent that the TOC information can be read, the pickup lens moves to the position of the second cleaning member 2 as it is, so that the second cleaning member 2 performs cleaning to the originally required level. Is done.

[0024]

Second Embodiment Next, another embodiment of the present invention will be described with reference to FIG.

This embodiment is different from the above embodiment in the position where the second cleaning member 2 is planted.

That is, in this embodiment, in order to avoid the influence of the second cleaning member 2 in the program area 6, a huge gap area 7 is set in the program area 6, and the second gap is set in the gap area 7. The cleaning member 2 is planted.

The reason for setting the gap area 7 to be huge is T
An arbitrary size can be set by changing the content of the OC information.

In the gap area 7, the content of the signal is ignored, and furthermore, the lack of the signal and the reading error are ignored.
Therefore, while the pickup lens is moving on the gap area 7, the cleaning by the second cleaning member 2 is completed, and generation of a popping sound or the like can be prevented.

[0029]

Third Embodiment Next, still another embodiment of the present invention will be described with reference to FIG.

In this embodiment, the lead-in position 4
The first cleaning member 1 is implanted in the same manner as the above-described embodiments, but the second cleaning member is provided between the lead-in area 23 where the TOC information is recorded and the program area 26 on the outer peripheral side. Fixed area 2 of cleaning member 2
5 in that 5 is secured.

The fixed area 25 can be set as a gap area as in the second embodiment.

[0032]

Fourth Embodiment In this embodiment, as shown in FIG. 6, there is a lead-in position 24 at a position 23 mm from the center of the disk.
OC information is recorded. The TOC information is recorded up to a position 33 mm from the center of the disc, and a program area 26 is set on the outer peripheral side.

That is, the lead-in area 35 in which the TOC information is recorded is extended, and when the lead-in area 35 is extended in this way, the lead-in position 24
The area width of the lead-in area 35 other than the area occupied by the first cleaning member 1 is increased, and the TOC information is reliably read by the pickup lens.

In this embodiment, the first cleaning member 1
Are implanted at a lead-in position 24 of 23 mm from the center. If the lead-in area 35 is wide as described above, the first cleaning member 1 can have sufficient cleaning ability and a large number of hair bundles. Therefore, the second cleaning member shown in each of the above-described embodiments is particularly necessary. However, in order to further improve the cleaning effect, the second cleaning member 2 is planted at three positions 201, 202, and 203 in the counterclockwise direction in FIG. 6 in this embodiment.

The planting place 202 is opposed to the planting place 101 of the first cleaning member 1 and is located at a position 28 mm from the center of the disk, that is, the lead-in area 35.
It is located at the center of the width.

In consideration of the balance of the disk, the planting point 201 is planted at a position 27.3 mm from the center of the position shifted 36 degrees from the planting point 202, and the planting point 203 is placed at the planting point 202. 2 degrees from the center of the position that is shifted 36 degrees from
It is planted at a position of 8.7 mm.

Therefore, the first cleaning member 1 and the second cleaning member 2 are located at the locations 101 and 101 respectively.
01, 202 and 203 are at least in the radial direction,
4.3 mm apart, the diameter of the perforation for implantation (approx.
5C), the TOC information can be sufficiently read.

If such a point-like planting is used, the TOC
Reading errors are reduced as much as possible, with little hindrance to information reading and the expansion of the lead-in area 35 where TOC information is repeatedly recorded.

As is clear from the rear view shown in FIG. 7, a fixed label 36 is exposed on the label side of each of the cleaning members 1 and 2, but is used at least for the second cleaning member 2. The fixed labels 36 are arranged on concentric circles for design consideration.

In each of the above embodiments, the cleaning section has been described as having a hair bundle implanted. However, the shape of the cleaning section is not limited to these embodiments. For example, as shown in FIG. The first cleaning member 51 may be a column-shaped hair bundle as in the above-described embodiment, and the second cleaning member 52 may be a row-shaped hair bundle. The first cleaning member can also be a row of hair bundles. In this case, the length and height of the row of hair bundles of the first cleaning member are larger than the length of the row of hair bundles of the second cleaning member. It is also desirable to shorten the length. Of course, each cleaning member may have the same hair bundle amount and the same shape. In this case, if the number of the second cleaning members is increased, the cleaning effect is improved.

The cleaning member is not in the form of a hair bundle, but may be a material such as felt or cloth.

[0042]

As described above, the present invention relates to a lens in which a cleaning member for cleaning a lens is fixed to a disk surface on which a lead-in area in which necessary information is recorded at the time of lead-in is arranged. In the cleaner, the cleaning member is fixed so as to include the lead-in position of the lead-in area of the disk, and the cleaning member occupies an area smaller than the radial width of the lead-in area. Even if a signal necessary for lead-in such as TOC recorded in the area cannot be read, even if the pickup lens is dirty, cleaning can be executed, and after that, T
A signal such as OC is read, and information recorded on the disc can be reproduced, and the added value as a cleaning disc is high.

Further, on a disk surface on which a lead-in area in which necessary information is recorded at the time of lead-in is arranged,
In a lens cleaner in which a plurality of lens cleaning members are fixed, among the cleaning members, a first cleaning member is fixed so as to include a lead-in position of a lead-in area of a disc, and the lead-in is fixed. The area smaller than the radial width of the area was occupied, and the second cleaning member was fixed at a position radially away from the fixing position of the first cleaning member.
Even if the pickup lens is dirty to the extent that signals necessary for lead-in such as OC cannot be read, cleaning can be performed, and after this preliminary cleaning,
Since the second cleaning member, which has less restriction on the size of the occupied area and thus can improve the cleaning ability, is provided, it is possible to perform cleaning to a level originally required. This has the operational effect of:

[0044]

[Brief description of the drawings]

FIG. 1 is a plan view of a lens cleaner for an optical pickup showing an embodiment of the present invention.

FIG. 2 is a sectional view of a lens cleaner for an optical pickup showing an embodiment of the present invention.

FIG. 3 is a sectional view of a lens cleaner for an optical pickup showing an embodiment of the present invention.

FIG. 4 is a plan view of a lens cleaner for an optical pickup according to a second embodiment of the present invention.

FIG. 5 is a plan view of a lens cleaner for an optical pickup according to a third embodiment of the present invention.

FIG. 6 is a plan view of a lens cleaner for an optical pickup according to a fourth embodiment of the present invention.

FIG. 7 is a rear view of a lens cleaner for an optical pickup according to a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First cleaning member 2 Second cleaning member 3 Lead-in area 4 Lead-in position

Claims (6)

[Claims] 1. A lens cleaner in which a cleaning member for cleaning a lens is fixed to a disk surface on which a lead-in area in which necessary information is recorded at the time of lead-in is disposed. A lens cleaner for an optical pickup, wherein the cleaning member is fixed so as to include the lead-in position of the in-area, and the cleaning member occupies an area smaller than the radial width of the lead-in area. 2. A lens cleaner in which a plurality of lens cleaning members are fixed on a disk surface on which a lead-in area in which necessary information is recorded at the time of lead-in is arranged. One cleaning member is fixed so as to include the lead-in position of the lead-in area of the disk, and occupies an area smaller than the radial width of the lead-in area. A lens cleaner for an optical pickup, wherein the lens cleaner is fixed at a position radially away from a fixing position of the cleaning member. 3. The occupation area of the first cleaning member fixed to the lead-in position is smaller than the occupation area of the second cleaning member.
The lens cleaner for an optical pickup described in the above. 4. The lens cleaner for an optical pickup according to claim 2, wherein said lead-in area is extended, and said second cleaning member is provided in said lead-in area. 5. A fixed area for a second cleaning member 2 is provided between the lead-in area and a program area in which reproduction information is recorded, and the second cleaning member is provided in the fixed area. The lens cleaner for an optical pickup according to claim 2 or 3, wherein the lens cleaner is used for an optical pickup. 6. The optical pickup according to claim 2, wherein a huge gap area is set at an arbitrary position on the disk, and the second cleaning member is disposed in the gap area. Lens cleaner.