JPH08124198A - Lens cleaner for optical disk player - Google Patents

Abstract

PURPOSE: To prevent a lens cleaner from becoming unusably in early stages by that a cleaning body is bent and deformed while fallen sidelong by a rubber roller operated for taking in/out a disk when a CD player with an auto-changer is cleaned using the lens cleaner that the cleaning body is flocked on the disk. CONSTITUTION: A protective projection 15 for relaxing the bent extent of the cleaning body 4 is projectingly provided in an endless ring shape outside of an error allowable area 9 on which the cleaning body 4 is arranged. Thus, when the disk 3 is put in/out, since the protective projection 15 receives the pressing force of the rubber roller R, the cleaning body 4 is prevented from being bent and deformed from a projecting base end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens cleaner having a wiping member protruding from a disc surface. This lens cleaner is applied to various optical diffusive players represented by a CD player to clean the surface of the pickup lens.

[0002]

2. Description of the Related Art In this type of lens cleaner, a wiping body such as a bristles of brushes or molded chips is planted on the disc surface, but the wiping body causes interruption of the reproducing operation of the disc. It is necessary to devise. In the lens cleaner disclosed in JP-A-5-159339, an extended lead-in area is continuously provided on the outer edge of the lead-in area, and a wiping member is planted therein. Japanese Patent Laid-Open No. 6-1808
In the lens cleaner disclosed in Japanese Patent No. 50, a huge gap area is secured in the program area, and a wiping body is planted there. In each case, the wiping body is placed in an error-allowing area in which reading errors such as burst errors can be ignored.

With respect to the present invention, it is known in JP-A-5-234116 that a donut disk-shaped spacer is fixed to the center of the signal reading surface side of the disk. This spacer controls the focusing operation of the pickup lens at the start of reproduction, and prevents the wiping body from coming into contact with the grease applied to the peripheral surface of the pickup guide shaft.
A wiping body made of molded chips is disclosed in Japanese Patent Laid-Open No. 5-120713.
It is known in Japanese Patent Publication No. 6-124473.

[0004]

[Problems to be Solved by the Invention] In-vehicle or home-use CD
Some players have an autochanger where multiple CDs loaded in a shelf magazine
Can be sequentially sent to the player side and continuously reproduced. Even in this type of CD player, the cleaning of the pickup lens can be automatically performed only by loading the lens cleaner into the magazine. The problem is that when the conventional lens cleaner is applied to this type of CD player, the wiping body is bent and deformed in a sideways manner and becomes unusable very early. The cause is due to the pair of rubber rollers for loading and unloading the CD from the magazine. Since the CD is taken in and out by closely rotating the rubber roller on the front and back of the disk and rotating the disk, the wiping member is bent sideways from the protruding base end while passing through the rubber roller.

When the wiping member is impregnated with the cleaning liquid for cleaning, the cleaning liquid is squeezed by the rubber roller, so that the cleaning liquid is picked up even if the wiping member can return to the normal standing posture. There is also a problem in that it cannot be applied to the surface of the lens. Since the CD is loaded and unloaded while the rubber roller is in close contact with the front and back surfaces of the board, the disk surface may be damaged when foreign matter is attached to the surface of the rubber roller.

An object of the present invention is to provide a lens cleaner capable of alleviating the bending of the wiping member when applied to an optical disc player with an autochanger and exhibiting a cleaning function for a longer period of time. Another object of the present invention is to provide a lens cleaner that can prevent the cleaning liquid impregnated in the wiping member from being squeezed out by the rubber roller and can reliably apply the cleaning liquid to the lens surface. Another object of the present invention is
It is an object of the present invention to provide a lens cleaner capable of preventing the signal reading surface from being damaged by foreign matter even when foreign matter is attached to the surface of the rubber roller. Another object of the present invention is to reduce the manufacturing cost of a lens cleaner suitable for a CD player with an autochanger. Another object of the present invention is to provide a lens cleaner suitable for a CD player with an autochanger, which has a cleaning function for a rubber roller.

[0007]

According to the lens cleaner of the present invention, the program area 6 of the disk 3 is provided with an error allowance area 9 in which a reading error of a recording signal can be ignored, and the error allowance area 9 is cleaned. It is characterized in that the wiping member 4 for use as a projection is provided, and that a protective protrusion 15 is provided so as to reduce the degree of bending of the wiping member 4 on the board surface radially outside the error-allowing area 9.

Specifically, the protection protrusion 15 is formed in an endless ring shape. The disc 3 and the donut disk-shaped holder 1
It is composed of a small disk 2 arranged and fixed in the center of the holder 1, and a protective protrusion 15 is integrally formed on one surface of the holder 1. An absorbing liquid 18 capable of impregnating and holding a cleaning liquid is embedded in an endless annular shape on the board surface radially outside the error-allowing area 9. The liquid absorbent 18 is arranged at the position where the protective protrusion 15 is formed. The liquid absorbent 18 is embedded on both front and back surfaces of the holder 1.

[0009]

In operation, the disk 3 of the lens cleaner is fed by the rubber roller R and taken out from the magazine. At this time, since the protection protrusion 15 is provided outside the error permissible area 9, the rubber roller R rides on the protection protrusion 15 prior to contact with the wiping body 4, and feeds the disk 3. Therefore, the wiping member 4 can be bent with a margin corresponding to the protruding height of the protection protrusion 15, and it is possible to prevent the base end portion from being plastically deformed or the base end being broken. All the cleaning liquid contained in the wiping member 4 is not squeezed out by the rubber roller R. further,
The rubber roller R does not directly contact the signal recording surface inside the protective projection 15.

With the protective projection 15 formed in an endless annular shape, the disk 3 can be taken in and out by the rubber roller R from any direction. That is, it is not necessary to load the disc 3 into the magazine while considering the loading / unloading direction of the disc 3. In this type of cleaner, most of the cost is occupied by the optical disk body, but if the disk 3 is composed of a holder 1 and a small disk 2 fixed in the center of the holder,
Compared with the case where the entire disc 3 is formed of an optical disc body, it is sufficient to prepare a small disc 2 of a smaller size that is cheaper. Since the protection protrusion 15 can be formed integrally with the holder 1, the manufacturing cost can be reduced in this respect as well. According to the lens cleaner in which the liquid absorbent 18 is embedded in the disk 3, the cleaning liquid contained in the liquid absorbent 18 is applied to the rubber roller R to clean the roller surface while the disk 3 is taken out from the magazine. You can

[0011]

According to the present invention, the protective projection 15 is provided on the board surface outside the error allowance area 9 in which the wiping member 4 is arranged, and when the disk 3 is fed by the rubber roller R,
The pressing force of the rubber roller R was received by the protective projection 15 to prevent the protruding base end of the wiping body 4 from being bent sideways by the rubber roller R. As a result, when the wiping member 4 passes between the rubber rollers R, the wiping member 4 can be bent with a margin corresponding to the protruding height of the protection protrusion 15, and its base end portion is bent into an L-shape or bent at the base end. It is possible to obtain a lens cleaner with excellent durability that can be repeatedly applied to an optical disc player with an autochanger by eliminating the occurrence of scratches.

When passing between the rubber rollers R, the wiping member 4 contacts the peripheral surface of the rubber roller R and bends, but is away from the disc surface of the disk 3. Therefore, a part of the cleaning liquid receives bending pressure and is squeezed out from the wiping body 4, but most of it remains inside the wiping body 4. Therefore, when the wet cleaning mode is adopted, the cleaning liquid can be surely applied to the surface of the pickup lens to improve the cleaning effect. A protective protrusion 15 is provided outside the signal recording portion indispensable for cleaning while continuing the reproduction operation of the optical disc player to prevent the rubber roller R from directly contacting the signal recording portion when the lens cleaner is taken in and out. Therefore, even if foreign matter is attached to the peripheral surface of the rubber roller R, it is possible to prevent the foreign matter from damaging the signal recording portion, and also in this respect, the durability of the lens cleaner can be improved.

According to the lens cleaner composed of the holder 1 and the small small disk 2 which is fixed to the center of the board surface, the manufacturing cost of the optical disk body, which occupies most of the cost, is low, and the holder 1 has a protective projection. By integrally forming 15, the manufacturing cost of the entire lens cleaner can be reduced. The liquid absorbent 1 impregnated with and holds the cleaning liquid on the disk surface radially outside the error-allowed area 9 of the disk 3.
According to the lens cleaner in which 8 is embedded, every time the pickup lens is cleaned, the cleaning liquid is applied to the rubber roller R to clean the roller surface.
As a result, it is possible to prevent the optical disc from being scratched by foreign matter attached to the rubber roller R when the autochanger is used.

[0014]

【Example】

(Embodiment 1) FIGS. 1 to 5 show C with an autochanger.
The Example of the lens cleaner for D players is shown. 1 and 2, the lens cleaner comprises a donut disk-shaped holder 1 and a small disk (optical disk body) 2 fixed in the center of the holder 1 to form a disk 3, and a signal reading surface of the small disk 2 is cleaned. A plurality of wiping bodies 4 for use are planted and configured.

The small disc 2 is a single C having an outer diameter of 8 cm.
It is formed to have substantially the same specifications as D, and its signal recording surface is provided with a lead-in area 5, a program area 6, and a lead-out area 7 in order from the inner circumference side. The program area 6 is provided with an error allowance area 9 in which a read error of a recording signal such as a burst error can be ignored, and four wiping bodies 4 are arranged in the error allowance area 9. The error-allowed area 9 can be formed continuously with the outer edge of the lead-in area 5 by providing an extended lead-in area in which TOC information is repeatedly recorded, or by rewriting the TOC information in the lead-in area 5. It can be formed by providing a huge gap area at an arbitrary position in the program area 6. In this embodiment, the error tolerance area 9 having a radial dimension of 8 mm is secured outside the outer edge of the lead-in area 5 by the former method.

In FIG. 3, the wiping member 4 is composed of a molded chip in which a mounting portion 10 for the small disk 2 and a tapered tapered contact portion 11 projecting from the disk surface of the small disk 2 are integrally formed. The portion 10 is fitted into the planting hole 12 provided in the small disk 2 and fixed with an adhesive. As a material for forming the wiping body 4, an elastically deformable porous body such as foamed rubber or foamed synthetic resin having open cell properties is used. Urethane foam is one example. The four wiping bodies 4 are spirally dispersed in the error-allowed area 9 to avoid adjacent wiping bodies 4 coming into contact with the pickup lens at the same time. The diameter of the mounting portion 10 of the wiping member 4 is 0.4.
It can be selected in the range of up to 2.5 mm, and in this embodiment, it is 0.8 mm. The protruding dimension of the contact portion 11 from the board surface was set to 2.5 to 3.0 mm.

The holder 1 is made of, for example, a donut disk-shaped plastic molded product obtained by injection molding of polycarbonate, and the small disk 2 is fitted and fixed in the loading portion 13 at the inner peripheral edge thereof. Therefore, as shown in FIG.
Is formed as a circular hole slightly larger than the outer diameter of the small disk 2, and six claw-shaped welding pieces 14 are provided at equal intervals along the peripheral edge of the loading portion 13. The small disk 2 is brought into contact with the welding surface 14 of the disk surface on the signal reading surface side by ultrasonic welding, or is adhered to or integrated with the holder 1. In this fixed state, the label surface and the lower surface of the holder 1 are flush with each other, and the clamp hole 2a of the small disc 2 and the outer peripheral edge of the holder 1 are concentric. The outer diameter of the holder 1 is a compact disc (C
It corresponds to the outer diameter dimension of D).

When the above lens cleaner is applied to a CD player equipped with an autochanger, the holder 1 is provided to prevent the wiping body 4 from being bent sideways from the projecting base end by the rubber roller R for moving the disk 3 in and out.
A protective projection 15 is provided on one surface of the wiping body 4 to reduce the degree of bending of the wiping body 4. More specifically, as shown in FIG. 4, the holder surface wall on the side on which the welding piece 14 is provided is formed to project in a mountain-shaped cross section, and the tip of the surface wall concentric with the loading portion 13 is formed into the protective projection 1.
It was set to 5. The protective projection 15 is located near the loading section 13,
It is formed in a state of protruding above the welding piece 14. The thickness T from the lower surface of the holder 1 was set to 1.7 mm. Since the thickness of the small disk 2 is 1.2 mm, the protective protrusion 1
The vertical dimension between 5 and the surface of the small disk 2 is 0.5 mm. The thickness of the outer peripheral edge of the holder 1 is 1.2 mm.

According to the lens cleaner constructed as described above, when the disk 3 is moved in and out by a pair of upper and lower rubber rollers R as shown in FIG.
The pressing force of 160 to 200 gf / cm ² acting on the protective projection 15 can be received. Therefore, although the wiping member 4 is bent and deformed by the rubber roller R in a sideways-like shape, it can be bent with an allowance for the vertical dimension between the surface of the small disk 2 and the protective projection 15, and its protruding base end is elastically deformed. It is possible to prevent bending beyond the limit and breaking of the base end. Therefore, the pair of rubber rollers R
After passing through the gap, the wiping member 4 returns to the standing posture and can properly perform the cleaning action. When one of the wiping bodies 4 (in many cases, the wiping body at the inner end) is impregnated with the cleaning liquid, a part of the wiping body is squeezed by the bending force, but most of the wiping body 4 is Since it remains inside, the cleaning liquid can be applied and supplied to the surface of the pickup lens. Since the protection projection 15 surrounds the small disk 2, the rubber roller R does not directly contact the signal reading surface of the small disk 2. Since the lens cleaner is composed of the small disk 2 and the holder 1, the manufacturing cost of which is lower than that of the compact disk, the cost required for manufacturing the lens cleaner is also low.

6A to 6C show modified examples of the holder 1. In FIG. 6A, a groove 17 having a partial arc cross section is formed in each of the formation portion of the protective protrusion 15 and the middle portion of the lower surface side of the holder 1, and the liquid absorption 18 capable of impregnating and holding the cleaning liquid in the groove 17 is formed. Was fixed in an embedded manner. Each groove 17 is formed in an endless ring shape with the front and back surfaces of the holder 1 facing each other. The liquid absorbent 18 is formed of an elastically deformable porous body similar to the wiping body 4. According to this lens cleaner, when the disk 3 is moved in and out by the rubber roller R, the cleaning liquid contained in the liquid absorbent 18 can be attached to the rubber roller R to clean the peripheral surface thereof. Each groove 17 also functions as a thickness adjusting recess for preventing sink marks when the holder 1 is injection-molded. In this embodiment, the liquid absorbent 18 mounted in the upper groove 17 projects above the other, but this portion is crushed by the rubber roller R and elastically deformed.
Opening edges of the inside and outside of 7 function as the projections 15.

In the holder 1 shown in FIG. 6B, the cross-sectional shape is formed into a flat trapezoidal shape, and most of the upper side portion is the protective projection 1.
5, the groove 17 and the liquid absorbent 1 on the outermost edge of the upper side.
8 are arranged. In this way, when the liquid absorbent 18 is provided on the peripheral edge of the holder 1, the liquid application range for the rubber roller R can be further expanded. In the holder 1 shown in FIG. 6C, the groove 17 and the liquid absorbent 18 are concentrically provided only on the lower surface side.

FIGS. 7A to 7D show modified examples of the arrangement of the protection protrusions 15. In FIG. 7A, a group of vertical and horizontal first ribs 15a and a polygonal second rib 15b traversing these ribs 15a are projected on one surface of the flat plate-shaped holder 1 to form a protective projection 15. . In FIG. 7B, a group of radial ribs 15c constitutes the protection protrusion 15.
In FIG. 7C, a group of arc ribs 15d are arranged in a flower shape to form the protection protrusions 15. In FIG. 7D, a group of linear ribs 15e arranged in a spiral form the protective protrusion 15. As can be understood from these modified examples, the arrangement form of the protection protrusions 15 and the shape seen from the plane thereof can be freely set.

(Embodiment 2) FIGS. 8 and 9 show Embodiment 2 of the lens cleaner according to the present invention. In this embodiment, the wiping member 4 is fixedly implanted on the disc 3 having substantially the same specifications as the compact disc in the same manner as in the above-mentioned embodiment, and the endless ring-like shape is formed on the disc surface radially outside the error allowable area 9. A protective protrusion 15 was provided to provide a lens cleaner.
The protective projection 15 is formed in a semicircular cross section by applying foam printing to the surface of the disk 3, and also serves as the liquid absorbent 18 in the above-described embodiment. The same members and parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The protective protrusion 15 in the second embodiment can be formed as an injection-molded plastic molded product. In this case, the protective protrusion 15 is adhesively fixed to the disk 3 or is attached to the mounting surface of the protective protrusion 15. It is possible to integrally form a plurality of connecting protrusions and then fix them by fitting them in the connecting holes formed in the disc 3. Protective protrusion 1
The cross-sectional shape and arrangement form of 5 can be variously changed as in the modification of the first embodiment. It is possible to prepare several types of protective projections 15 having different cross-sectional thicknesses, and replace and mount them on the disk 3. The wiping body 4 does not have to be a molded chip,
It may be a bunch of bristles. The lens cleaner of the present invention can be applied not only to a normal CD player having no autochanger but also to a laser disc player or a CDV player.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a lens cleaner.

FIG. 2 is a plan view of a lens cleaner.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is a cross-sectional view showing a usage state of the lens cleaner.

6 (a) to 6 (c) are cross-sectional views showing modified examples of the holder.

FIG. 7A to FIG. 7D are schematic plan views showing modified examples of the protection protrusion.

FIG. 8 is a plan view of a lens cleaner according to a second embodiment.

9 is a sectional view taken along line CC in FIG.

[Explanation of symbols]

 1 Holder 2 Small Disc 3 Disc 4 Wiping Body 6 Program Area 9 Error Allowable Area 15 Protective Protrusion 18 Liquid Absorption

Claims (6)

[Claims] 1. An error tolerance area 9 in which a reading error of a recording signal can be ignored in the program area 6 of the disk 3.
The cleaning wiping body 4 is provided in a projecting manner in the error allowable area 9, and the protective projection 15 for relaxing the degree of bending of the wiping body 4 is provided in a protruding manner on the board surface radially outside the error allowing area 9. A lens cleaner for an optical disc player. 2. The lens cleaner for an optical disk player according to claim 1, wherein the protection protrusion 15 is formed in an endless annular shape. 3. The disk 3 comprises a donut disk-shaped holder 1 and a small disk 2 arranged and fixed in the center of the holder 1, and a protective projection 15 is integrally formed on one surface of the holder 1. 2. A lens cleaner for an optical disc player as described in 2. 4. The lens cleaner for an optical disk player according to claim 1, 2 or 3, wherein an absorbing liquid 18 capable of being impregnated with and holding a cleaning liquid is embedded in an endless annular shape on a board surface radially outside the error allowable area 9. 5. The lens cleaner for an optical disk player according to claim 4, wherein the liquid absorbent 18 is arranged at a position where the protection protrusion 15 is formed. 6. The lens cleaner for an optical disk player according to claim 4, wherein the liquid absorbent 18 is embedded on both front and back surfaces of the holder 1.