JPH10275457A - Optical disk reproducing and/or recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the dust stuck on the recording surface of an optical disk and to properly conduct a reproducing and a recording by providing an air controlling plate at the place, where the tip of the plate comes close to the recording surface of the disk and changing the air flow caused by the rotation of the disk. SOLUTION: An air controlling plate 12 is arranged at a prescribed position of the moving base on which an optical pickup is mounted. The plate 12 is made of integrally forming a vertical section 12a, a tilted section 12b and a to-be-fixed section 12c by bending a rectangular plate metal. At that time, it is set so that the tip of the section 12b and the bottom surface of the recording surface of an optical disk 3 come close to each other while the disk 3 is mounted. A portion of the arc shaped air flow caused by the rotation of the disk 3 is intercepted by the section 12b of the plate 12, eddies 19 are generated in the vicinity of an outer surface 12d, the dust stuck on the recording surface are removed, the dust is adhered to the adhesive, which is beforehand spread on an inner surface 12e and the surface 12d of the section 12b, and the cleaning of the recording surface of the disk 3 is surely maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an optical disk reproducing and / or recording apparatus. More specifically, the present invention relates to a technique for removing dust or the like adhering to a recording surface of an optical disc so that reproduction and / or recording on the optical disc can be performed favorably.

[0002]

2. Description of the Related Art For example, an optical disk reproducing and / or recording apparatus for reading a signal recorded on an optical disk such as a compact disk (CD) or a digital video disk (DVD) or recording a signal on the optical disk. There is.

[0003]

In the above-mentioned optical disk reproducing and / or recording apparatus, dust floating inside the apparatus or members provided on the apparatus come into contact with each other. In some cases, so-called shavings and the like generated by the dust may adhere to the surface of the optical disc.

If the above-mentioned dust or the like adheres to the recording surface of the optical disk, the effect of the dust or the like deteriorates the reading performance of the optical pickup with respect to the signal recorded on the recording surface, and the like. Reproduction and / or
Or, recording may not be performed properly.

Therefore, conventionally, in order to perform good reproduction and / or recording, dust or the like adhering to the recording surface of the optical disk is wiped off with a cleaning cloth or the like every time the dust or the like adheres to the recording surface. It was necessary to periodically wipe off dust and the like that had adhered with a cleaning cloth or the like, but such wiping was a troublesome operation and was extremely troublesome.

Accordingly, the optical disk reproducing and / or recording apparatus of the present invention overcomes the above-mentioned problems and provides a removing means for removing dust and the like inside the apparatus to eliminate dust and the like adhering to the recording surface of the optical disk. Playback on optical disc and / or
Alternatively, it is an object to perform good recording.

[0007]

SUMMARY OF THE INVENTION The present invention provides an optical disk reproducing and / or recording apparatus for solving the above-mentioned problems.
An air control plate is provided at a position where the leading end is close to the recording surface of the optical disk mounted on the mounting portion, and the flow of air generated near the surface of the optical disk by rotation of the optical disk is changed by the air control plate. .

Therefore, in the optical disk reproducing and / or recording apparatus of the present invention, the flow of air generated near the recording surface of the optical disk changes due to the rotation of the optical disk.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the optical disk reproducing and / or recording apparatus according to the present invention will be described below with reference to the accompanying drawings.

It is to be noted that the optical disc reproduction and / or
Alternatively, a recording device refers to a device that includes any of a device capable of reproducing and recording a signal on an optical disc, a device dedicated to reproduction, and a device dedicated to recording.

In this specification, the directions are defined as forward in the lower left direction in FIG. 1, backward in the upper right direction, left in the upper left direction, and right in the lower right direction in FIG. In the following description, an upward direction is defined as an upward direction, and a downward direction is defined as a downward direction.

The optical disk reproducing and / or recording apparatus includes a substantially box-shaped base chassis having an upper opening, and an upper chassis provided so as to cover the base chassis from above.
A moving base 2 on which an optical pickup is mounted on a bottom plate 1 of a base chassis, a moving mechanism 4 for moving the moving base 2 in a radial direction of an optical disc 3, for example, a compact disc, and a turntable 5 are provided (FIG. 1). 1).

The movable base 2 has a substantially plate-like shape, and an arrangement recess 7 which opens upward and forward is formed in the front half of the main part 6 except for the left and right ends. (See FIG. 2). The left and right ends of the movable base 2 are supported portions 8, 8, and the supported portions 8, 8 are slidably supported in the front-rear direction by two guide shafts described later.

A base 9 is arranged in the arrangement recess 7, and a portion 9a excluding both left and right end portions of the base 9 is formed as a supporting portion which is convex upward (see FIG. 2).

On the upper surface of the supporting portion 9a of the base 9, a two-axis actuator forming a part of an optical pickup is provided with a case body 10.
(See FIGS. 1 and 2). The objective lens 11 is positioned so as to slightly project upward from the arrangement hole 10a opened on the upper surface of the case body 10.

An air control plate 12 is fixed to the left opening edge of the arrangement recess 7 (see FIGS. 1 and 2). The air control plate 12 has a vertical portion 12a, an inclined portion 12b, and a fixed portion 12c. Are formed integrally by bending a rectangular plate-shaped metal material (see FIG. 3).

An inclined portion 12b is continuous with the upper edge of the vertical portion 12a, and the inclined portion 12b is formed so as to be bent with respect to the vertical portion 12a and extend obliquely upward from the vertical portion 12a. And the fixed part 12c is the vertical part 12a
And a vertical portion 12a on the same side as the inclined portion 12b.
Is formed by being bent at 90 ° with respect to.

In the air control plate 12, the fixed portion 12c is disposed at the left edge of the opening 7 on the left side of the concave portion 7 and to the left of the objective lens 11 of the biaxial actuator in the direction in which the fixed portion 12c moves away from the biaxial actuator. When the optical disk 3 is mounted on the mounting portion as described later, the air control plate 12 is in a state where the tip of the inclined portion 12a is close to the lower surface of the optical disk 3, that is, the recording surface. It has been like that.

As shown in FIG. 5, when the optical disk 3 is mounted on the mounting portion, the air control plate 12 passes through the center of rotation of the optical disk 3 and moves in the direction of movement of the moving base 2 (in FIG. 5, a two-dot chain line). Δ in the plane direction parallel to the line segment extending in the direction of the arrow shown in the drawing), that is, on the line segment separated by the same distance as the radius of the centering hole 3 a of the optical disc 3, and with respect to the moving direction of the moving base 2. It is fixed to the moving base 2 in a state where the rear end is inclined rightward and the front end is inclined leftward by an angle of α.

The air control plate 12 has a vertical portion 12a.
The upper end of the surface on the biaxial actuator side and the inclined surface 12d of the inclined portion 12b (hereinafter referred to as the “outer surface 12”).
d ", and the opposite surface is referred to as" inner surface 12e ". ) Is coated with an adhesive 13. As such an adhesive 13, for example, SP-7533 (trade name of Sumitomo 3M Limited) can be used. Further, the air control plate 12 is grounded.

The moving mechanism 4 includes two guide shafts 14, 14, a linear motor 15, and a slider 16 (see FIG. 1).

The guide shafts 14, 14 extend in the front-rear direction and are spaced apart from each other in the left-right direction, and support pillars 17, 17,.
・ ・ Supported by The supported portions 8 of the movable base 2 are slidably supported on the guide shafts 14 in the front-rear direction, that is, in the radial direction of the optical disk 3.

The right one 14 of the guide shafts 14
A linear motor 15 is disposed immediately to the right, and extends in the front-rear direction, and has a length substantially the same as that of the guide shaft 14.

A plate-like slider 16 which moves in the front-rear direction by driving the linear motor 15 is provided, and the left end of the slider 16 is fixed to the supported portion 8 on the right side of the moving base 2. Therefore, when the slider 16 is moved in the front-rear direction by the drive of the linear motor 15, the moving base 2 fixed to the slider 16 is guided by the guide shafts 14, and is moved in the front-rear direction.

A spindle motor 18 is arranged in front of the moving base 2, and the turntable 5 is supported on a rotating shaft of the spindle motor 18. The turntable 5 is a mounting portion on which the optical disk 3 is mounted, and has a disk-shaped disk mounting portion 5a and a centering projection 5b provided at the center thereof.

The optical disk 3 is chucked from above and below between a chucking member (not shown) provided in the apparatus and the disk mounting portion 5a of the turntable 5, and in this state, the spindle motor 18 Is rotated clockwise when viewed from above. Then, the moving base 2 is moved from the inner peripheral side to the outer peripheral side of the optical disk 3 by the moving mechanism 4, and a spot of laser light emitted from a laser light source (not shown) and irradiated through the objective lens 11 of the biaxial actuator is moved to the optical disk 3 The reproduction or recording with respect to the optical disk 3 is performed while following the recording track formed on the recording surface of the optical disk 3.

At this time, due to the rotation of the optical disk 3, an arc-shaped air flow is generated in the vicinity of the surface of the optical disk 3 so as to be displaced in the rotation direction of the optical disk 3 from the inner circumference toward the outer circumference toward the outer circumference (see the dotted line in FIG. Indicated by.). As described above, the moving base 2 is provided with the air control plate 12, and the inclined portion 1 of the air control plate 12 is provided.
Since the tip of 2b is close to the lower surface of the optical disk 3, that is, the recording surface, the air flow changes near the tip of the air control plate 12.

That is, as shown in FIG.
Part of the air flowing toward the inner surface 12e of the second inclined portion 12b flows downward from the inner surface 12e along the vertical portion 12a, and the remaining part is the recording surface of the optical disk 3 and the upper end of the inclined portion 12b. Through the gap between the right side and the right side as viewed in FIG. As described above, when the air control plate 12 blocks a part of the flow of air, a difference in pressure occurs between the left side and the right side of the air control plate 12, and the air that has passed through the gap due to the viscosity of the air causes the air to flow through the inclined portion. Vortices 19, 19,... Are generated near the outer surface 12d of 12b.

The dust and the like adhering to the recording surface are peeled off by the vortices 19, 19,... The dust that has fallen to the part to which the adhesive 13 has been applied, that is, the dust that has fallen on the upper end of one surface of the vertical portion 12a and the outer surface 12d of the inclined portion 12b that is continuous with the adhesive 13 is removed. Is adhered to.

Since the air control plate 12 is fixed to the moving base 2 at the left edge of the opening 7 on the left side of the objective lens 11 of the biaxial actuator, the optical disk 3 is viewed clockwise when viewed from above. The pits formed on the recording surface of the optical disc 3 passing above the air control plate 12 when rotated in the circumferential direction pass over the objective lens 11 of the biaxial actuator and then pass through the objective lens 11. Laser light is irradiated.

Accordingly, dust or the like adhering to the pit is peeled off immediately before the signal is reproduced or recorded.
No dust or the like adheres to the pits on the recording surface of the optical disk 3 and a good condition of the recording surface of the optical disc 3 is ensured.

As described above, since the air control plate 12 is provided near the recording surface of the optical disk 3 to change the flow of air generated near the recording surface by the rotation of the optical disk 3, Dust adhered to the recording surface is peeled off when the rotation of the optical disk 3 is performed, thereby preventing the optical pickup 3 from deteriorating the read performance and the like for the recording signal on the recording surface due to the influence of dust and the like. Can be performed well.

Further, dust adhered when the optical disc 3 is rotated by the air control plate 12 provided inside the apparatus is peeled off. Therefore, every time dust or the like adheres, the dust is wiped off with a cleaning cloth or the like. Can eliminate the troublesome work of periodically wiping dust and the like that have adhered with a cleaning cloth or the like, thereby saving labor.

Further, since the adhesive 13 is applied to the surface of the air control plate 12, there is no possibility that the peeled-off dust adheres to the adhesive 13 and adheres again to the recording surface of the optical disc 3. Further, it is possible to further prevent the reading performance and the like of the optical pickup from deteriorating due to dust and the like.

In addition, the air control plate 12 has a slope 12
b is formed and the inclined portion 12b has a certain angle other than 90 ° and 180 ° with respect to the recording surface of the optical disc 3, so that the air control plate 12 is perpendicular or parallel to the recording surface. .. Are more likely to be generated near the outer surface 12d of the inclined portion 12b, and dust and the like are more likely to be peeled off from the recording surface as compared with the case where they are provided.

The air control plate may not be provided on the movable base 2 but may be provided on the upper surface of the bottom plate 1, for example. In this case, when the optical disk 3 rotates, the air control plate is provided below all the recording areas on the recording surface. In order to position the air control plate, the air control plate must be formed to have substantially the same length as the radial length of the recording surface of the optical disc 3, and a large space for arranging the air control plate is required. This causes a problem that the size of the device becomes large.

Therefore, as described above, the air control plate 1
If the optical base 3 is provided on the movable base 2, the movable base 2 moves from the inner periphery to the outer periphery of the optical disk 3 when the optical disk 3 rotates, and the air control plate 12 is located below all the recording areas on the recording surface. Therefore, a small air control plate 12 is sufficient,
The material cost involved is low, and there is no problem that a large space for arranging the air control plate 12 as described above is required.

Further, since the air control plate 12 is formed of a metal material and is grounded, the recording surface of the optical disk 3 located close to the air control plate 12 is prevented from being charged, and the recording surface of the optical disk 3 is protected from dust. In particular, it becomes difficult for metal powder and the like to adhere.

As described above, the air control plate 12 is δ in the plane direction parallel to the line segment passing through the rotation center of the optical disk 3 and extending in the moving direction of the moving base 2, that is, the optical disk 3
Are located on a line segment separated by the same distance as the radius of the centering hole 3a (see FIG. 5).

As described above, since the air control plate 12 is located on a line segment separated by the same distance as the radius of the centering hole 3a of the optical disk 3, the optical disk 3 is rotated and the moving base 2 is moved inside the optical disk 3. When the air control plate 12 is moved from the periphery to the outer periphery, the air control plate 12 is moved corresponding to all the recording areas formed on the recording surface of the optical disc 3, and among the pits formed on the recording surface, the air control plate 12 is moved.
There is no one that does not pass above.

As described above, the air control plate 12
Is fixed to the moving base 2 in a state of being inclined by an angle α with respect to the moving direction of the moving base 2 (see FIG. 5).

As described above, if the air control plate 12 is fixed in a state of being inclined by an angle of α, when the optical disk 3 rotates, it moves from the inner circumference to the outer circumference near the recording surface of the optical disk 3 as shown in FIG. Since an arc-shaped air flow is generated so as to be displaced in the rotation direction of the optical disk 3 as approaching the outer circumference, the main surface of the air control plate 12 is completely left and right, that is, orthogonal to the moving direction of the moving base 2. Since the air flowing from the inner surface 12e of the inclined portion 12b of the air control plate 12 is more easily received from the front side than the case where the air control plate 12 is positioned in the direction, vortices 19, 19,. Is easily peeled off.

The angle α differs depending on the type of the optical disk used, and is calculated from the distance δ and the rotation speed of the optical disk.

[0044]

As is clear from the above description, the optical disk reproducing and / or recording apparatus of the present invention has an air control plate provided at a position where the tip is close to the recording surface of the optical disk mounted on the mounting portion. Since the air flow generated near the surface of the optical disk due to the rotation of the optical disk is changed by the air control plate, the dust adhered to the recording surface when the optical disk is rotated is peeled off, and the recording is affected by dust and the like. The reading performance of the optical pickup with respect to the recording signal of the surface is prevented from being lowered, and the reproduction and / or recording with respect to the optical disc can be performed favorably.

Further, dust adhered when the optical disk is rotated is peeled off by the air control plate provided in the apparatus. Therefore, every time the dust adheres, the dust is wiped off with a cleaning cloth or the like. This eliminates the need for troublesome work such as wiping dust or the like adhered to the surface with a cleaning cloth, and saves time and effort.

According to the second aspect of the present invention, since the adhesive is applied to the surface of the air control plate, the dust that has come off may adhere to the adhesive and adhere to the recording surface of the optical disk again. Thus, it is possible to further prevent the reading performance and the like of the optical pickup from deteriorating due to dust and the like.

According to the third and fourth aspects of the present invention, the air control plate is formed so that the edge on the optical disk side extends in the surface direction of the optical disk. Since the surface extending in the direction is located at an arbitrary angle that is not orthogonal and not parallel to the recording surface of the optical disc, eddies are easily generated, and dust and the like are easily peeled off from the recording surface.

According to the fifth aspect of the present invention, since the air control plate is provided on the moving base that moves in the radial direction of the optical disc during reproduction and / or recording on the optical disc, the air control board is provided. Is small,
The material cost involved is low, and the device does not become large because a large space for arranging the air control plate is not required.

According to the ninth to sixteenth aspects of the present invention, since the air control plate is made of a conductive material and is grounded, the recording surface of the optical disk located close to the air control plate is prevented from being charged. As a result, dust and the like, particularly metal powder and the like, hardly adhere to the recording surface of the optical disc.

It should be noted that the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the embodiment when the present invention is implemented, and
These should not be construed as limiting the technical scope of the present invention.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the optical disk reproducing and / or recording apparatus of the present invention together with FIG. 2 to FIG. 5, and FIG. 1 is a schematic perspective view of a main part.

FIG. 2 is a schematic front view of a main part.

FIG. 3 is an enlarged perspective view of an air control plate.

FIG. 4 is a schematic diagram showing a state in which a vortex is generated.

FIG. 5 is a plan view showing a positional relationship between an air control plate and an optical disk.

[Explanation of symbols]

2 ... moving base, 3 ... optical disk, 5 ... turntable (mounting part), 12 ... air control plate, 13 ... adhesive

Claims (16)

[Claims] An air control plate is provided at a position where the tip is close to a recording surface of an optical disk mounted on a mounting portion, and the air control plate changes a flow of air generated near the surface by rotation of the optical disk. An optical disk reproducing and / or recording apparatus characterized by having the above configuration. 2. The optical disk reproducing and / or recording apparatus according to claim 1, wherein an adhesive is applied to a surface of the air control plate. 3. The air control plate is formed so that an edge on the optical disk side extends in a surface direction of the optical disk, and a surface extending in a surface direction of the optical disk among the edges on the optical disk side is orthogonal to a recording surface of the optical disk. 2. The optical disk reproducing and / or recording apparatus according to claim 1, wherein the optical disk is positioned at an arbitrary angle that is not parallel and that is not parallel. 4. The air control plate is formed so that an edge on the optical disk side extends in a surface direction of the optical disk, and a surface of the edge on the optical disk side extending in a surface direction of the optical disk is orthogonal to a recording surface of the optical disk. 3. The optical disk reproducing and / or recording apparatus according to claim 2, wherein the optical disk is positioned at an arbitrary angle that is not parallel and that is not parallel. 5. The optical disk reproduction and / or recording according to claim 1, wherein the air control plate is provided on a moving base that moves in a radial direction of the optical disk during reproduction and / or recording on the optical disk. apparatus. 6. The optical disk reproduction and / or recording according to claim 2, wherein the air control plate is provided on a moving base that moves in a radial direction of the optical disk during reproduction and / or recording on the optical disk. apparatus. 7. The optical disk reproduction and / or recording according to claim 3, wherein the air control plate is provided on a moving base that moves in a radial direction of the optical disk during reproduction and / or recording on the optical disk. apparatus. 8. The optical disk reproduction and / or recording according to claim 4, wherein the air control plate is provided on a moving base that moves in a radial direction of the optical disk during reproduction and / or recording on the optical disk. apparatus. 9. The optical disk reproducing and / or recording apparatus according to claim 1, wherein the air control plate is made of a conductive material and is grounded. 10. The optical disk reproducing and / or recording apparatus according to claim 2, wherein the air control plate is made of a conductive material and grounded. 11. The optical disk reproducing and / or recording apparatus according to claim 3, wherein the air control plate is made of a conductive material and is grounded. 12. The optical disk reproducing and / or recording apparatus according to claim 4, wherein the air control plate is made of a conductive material and is grounded. 13. The optical disk reproducing and / or recording apparatus according to claim 5, wherein the air control plate is made of a conductive material and is grounded. 14. The optical disk reproducing and / or recording apparatus according to claim 6, wherein the air control plate is made of a conductive material and is grounded. 15. The optical disk reproducing and / or recording apparatus according to claim 7, wherein the air control plate is made of a conductive material and is grounded. 16. The optical disk reproducing and / or recording apparatus according to claim 8, wherein the air control plate is made of a conductive material and is grounded.