JP2000105932A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the height position of the guide rail independently adjustable against the surface of the base and to contrive the miniaturization of an optical disk device by arranging optical pickups in a manner that they face each other along a prescribed radial direction, supporting them so as to make them slidable in the radial direction, and bringing each of the first and the second guide rail end into contact with the first, second, third and fourth inclined faces. SOLUTION: With adjusting screws 12a, 12b rotated at the same angle in the same direction, a rail guide member 10 on the outer circumferential side moves in the radial direction of a disk, and simultaneously, the outer circumferential ends of the rails 2a, 2b each move vertically, adjusting relative inclination in the radial direction against the recording face of the disk 3 in the optical axis of the optical pickup 1. Then, with one of the adjusting screws 12c, 12d rotated, one of the guide rails 2a, 2b, while being moved in the disk radial direction X, is raised or lowered along the inclined face 9b of the rail guide member 9 on the inner circumferential side and that of 10a of the rail guide member 10 on the outer circumferential side, thereby making adjustment of the relative inclination in the tangential direction of the optical pickup.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device, and more particularly to an improvement in a mechanism for adjusting the tilt of an optical pickup.

[0002]

2. Description of the Related Art In an optical disk apparatus, when information recorded on a disk is reproduced by an optical pickup or when information is recorded on the disk by the optical pickup, a light beam (laser) emitted from the optical pickup is used. Since the inclination of the optical axis of the optical axis with respect to the disk surface adversely affects the recording or reproduction accuracy, the optical disk apparatus has conventionally been provided with an adjustment mechanism for correcting the inclination of the optical axis as described above. . In particular, in recent years, as the demand for high-density optical discs such as DVDs has increased and the accuracy of information recording and reproduction required for optical disc apparatuses has become strict, a mechanism for adjusting the tilt of the optical axis of the optical pickup as described above has become increasingly important. Has become.

Hereinafter, an optical disk device provided with a conventional optical pickup tilt adjusting mechanism will be described. FIG. 3A is a plan view showing a first configuration example of an optical disk device having a conventional optical pickup tilt adjusting mechanism, and FIG. 3B is a plan view of FIG.
FIG. 3 is a sectional view taken along line IIIb-IIIb of FIG.

[0004] The optical disk device 300 comprises a spindle motor 5 for rotating a disk 3 having a data recording surface.
And an optical pickup 1 for irradiating the data recording surface of the disk 3 with a light beam to access data, and an optical pickup 1 arranged in a predetermined radial direction X of the disk 3 so as to face each other. It has first and second guide rails 2a and 2b for supporting the optical pickup 1 so as to be slidable in the radial direction X of the disk.

Here, the spindle motor 5 has a turntable 7 attached to a rotary shaft thereof, and a disk 3 is mounted on the turntable 7 such that a data recording surface thereof is perpendicular to the rotary shaft. It has become so. The spindle motor 5 is mounted on the surface of the chassis 6 so that the direction of its rotation axis can be changed with respect to the normal direction of the surface. That is, the mounting plates 5a of the motor 5 are screwed at three positions around the motor 5 with the tips of the adjusting screws 32a to 32c inserted from the back side of the chassis 6 into the screw insertion holes. Helical springs 8 are respectively mounted on portions of the adjustment screws 32a to 32c between the chassis 6 and the mounting plate 5a.
By the urging force of the spring 8, each adjusting screw 32a
32c are in contact with the rear surface of the chassis 6. The adjusting screws 32a and 32c are arranged in the predetermined radial direction X.
And 32c are arranged side by side in a direction Y perpendicular to the predetermined radial direction X. Further, the screws 32a and 32c
“b” is positioned so as to face each other across the center of the rotation axis of the motor 5.

Both ends of the guide rails 2a and 2b are fixed to a component fixture 30 attached to the chassis 6, and the optical pickup 1 has components formed on both sides thereof. The guide rails 2a and 2b are inserted into the insertion holes, and the guide rails 2a and 2b are inserted.
It is slidable in the predetermined radial direction X along b.

A feed guide member 4a is provided near the guide rail 2b, and a feed motor 4 for moving the optical pickup 1 in the predetermined radial direction X is provided on the feed guide member 4a. It is installed.

Reference numeral 13 in the figure denotes a deck tray for loading the optical disk 3 into an optical disk device or discharging the disk from the device.

In the optical disk device 300 having such a configuration, by rotating the adjusting screws 32a and 32b as shown in FIG. 4, the optical axis of the optical pickup with respect to the data recording surface (hereinafter, also simply referred to as the optical axis). The relative inclination in the radial and tangential directions can be adjusted.

That is, as shown in FIG. 4 (a), by adjusting the adjusting screw 32a, the rotating shaft of the spindle motor 5 in a first plane perpendicular to the chassis surface and parallel to a predetermined radial direction X. (The inclination of the optical axis in the radial direction with respect to the data recording surface) between the optical disk and the normal to the surface of the chassis 6 changes. Also, as shown in FIG.
By adjusting the adjustment screw 32b, the relative angle (in the second plane perpendicular to the chassis surface and perpendicular to the first plane) between the direction of the rotation axis of the spindle motor 5 and the normal to the surface of the chassis 6 ( The inclination of the optical axis with respect to the data recording surface in the tangential direction changes.

FIG. 5A is a plan view showing a second example of the structure of an optical disk device having a conventional optical pickup tilt adjusting mechanism, and FIG. 5B is a sectional view taken along line Vb-Vb of FIG. 5A. is there.

The optical disk device 500 has a spindle motor 5 for rotating the disk 3 having a data recording surface and an optical disk with respect to the data recording surface of the disk 3 as in the optical disk device 300 shown as the first configuration example. An optical pickup 1 for irradiating a beam to access data is disposed so as to face a predetermined radial direction X of the disk 3, and the optical pickup 1 is slid in the radial direction X of the disk. First and second supporting as possible
Guide rails 2a and 2b.

In this example, the spindle motor 5 is fixed on the surface of the chassis 6. The first and second guide rails 2a and 2b are each supported by a support member 39 such that an inner peripheral end of the disk can be moved up and down by an outer peripheral end of the disk. The outer peripheral end is supported by the support mechanism 50 so that the position in the vertical direction can be changed.
The support mechanism 50 has a component support piece 51 whose one end is fixed to the chassis 6 and the other end is located on the upper surface side of the outer peripheral end of each of the guide rails 2a and 2b. The other end of each of the guide rails 2a, 2
b, adjusting screws 52a and 52b screwed to face the upper surface of the outer peripheral end of the disc, and the guide rails 2
A bias spring 58 is disposed on the lower surface side of the outer peripheral end of the disk a, 2b, and biases the outer peripheral end such that it abuts against the tip of each of the adjusting screws 52a, 52b.

The guide rails 2a and 2b include:
The optical pickup 1 is mounted so as to be slidable in the predetermined radial direction X as in the optical disk device of the first configuration example. The other configuration of the optical disk device 500 shown in FIG. 5 is similar to the optical disk device 30 of the first configuration example.
Same as 0.

In the optical disk device 500 having such a configuration, by rotating the adjusting screws 52a and 52b as shown in FIG. 6, the optical axis of the optical pickup with respect to the data recording surface (hereinafter, also simply referred to as the optical axis). The relative inclination in the radial and tangential directions can be adjusted.

That is, as shown in FIG. 6A, by rotating the adjusting screws 52a and 52b in the same direction by the same angle, the inclination of the optical axis with respect to the data recording surface in the radial direction changes, and the adjusting screw 52a is rotated. , 52b, the inclination of the optical axis with respect to the data recording surface in the tangential direction changes.

FIG. 7A is a plan view showing a third example of an optical disk apparatus having a conventional optical pickup tilt adjusting mechanism, and FIG. 7B is a sectional view taken along the line VIIb-VIIb of FIG. 7A. is there.

This optical disk device 700 has a disk 3 having a data recording surface, which is fixed to a chassis 6, similarly to the optical disk device 500 shown as the second configuration example.
A spindle motor 5 for rotating the disk 3; an optical pickup 1 for irradiating a data beam on the data recording surface of the disk 3 to access data;
Are arranged to face each other along a predetermined radial direction X,
There are first and second guide rails 2a and 2b for supporting the optical pickup 1 slidably in the radial direction X of the disk.

In the third configuration example, the first and second guide rails 2a and 2b are supported such that both ends thereof can move up and down. That is,
The inner end portions of the guide rails 2a and 2b on the inner peripheral side of the disk are supported by first and second inner peripheral side support mechanisms 70a and 70b so that the positions in the vertical direction can be changed.

Here, the first inner peripheral side support mechanism 70a
Is a component supporting piece 71 having one end located above the inner peripheral end of the guide rail 2a and the other end fixed to the chassis 6.
a, and the tip of the guide rail 2
a adjusting screw 72 screwed to face the inner peripheral end of
a, one end of the component support piece 71a and the guide rail 2
a between the inner peripheral ends of the adjusting screw 72a, the urging spring 7 urging the inner peripheral end to abut on the tip of the adjusting screw 72a.
And 8. Similarly, the second inner peripheral side support mechanism 70b has one end located above the inner peripheral end of the guide rail 2b and the other end located above the chassis 6 just like the first inner peripheral side support mechanism 70a. Component support piece 71 fixed to
b, and the tip of the guide rail 2
adjusting screw 72 screwed so as to face the inner peripheral side end of b
b, one end of the component support piece 71b and the guide rail 2
The biasing spring 7 is disposed between the inner peripheral side ends of the adjusting screw 72b to bias the inner peripheral side end against the tip of the adjusting screw 72b.
And 8.

The outer peripheral ends of the guide rails 2a and 2b are supported by a third outer support mechanism 70c so that the positions in the vertical direction can be changed.

Here, the third outer peripheral side support mechanism 70c
Is a component support piece 71c having one end located above the inner peripheral end of the guide rails 2a and 2b, the other end fixed to the chassis 6, and the rails 2a, Adjustment screws 72c and 72d screwed to face the outer peripheral end of the guide rail 2b are disposed between one end of the component support piece 71c and the outer peripheral end of each of the guide rails 2a and 2b. The side ends are the adjustment screws 72c, 72
and a biasing spring 78 for biasing to abut on the leading end of d. Other configurations of the optical disc device 700 as the third configuration example are the same as those of the optical disc device 500 of the second configuration example.

In the optical disk device 700 having such a configuration, the relative inclination of the optical axis with respect to the data recording surface in the radial direction and the tangential direction is adjusted by rotating the adjusting screws 72a to 72d as shown in FIG. can do.

That is, as shown in FIG. 8A, by rotating the adjusting screws 72a and 72b in the same direction by the same angle, or by rotating the adjusting screws 72c and 72d in the same direction by the same angle, the radial The inclination of the direction changes. As shown in FIG. 8B, the adjusting screws 72a and 72c are rotated in the same direction by the same angle,
And 72d in the same direction by the same angle,
The tilt adjustment in the tangential direction is performed. FIG.
As shown in (c), by rotating the adjusting screws 72a to 72d in the same direction by the same angle, the height of the optical pickup 1, that is, the distance between the data recording surface of the optical disk and the optical pickup 1 changes.

[0025]

By the way, in the optical pickup tilt adjusting mechanism of the optical disk apparatus 300 shown in FIG. 3, since the spring 38 as an elastic body is interposed between the chassis 6 and the spindle motor 5, the disk 3 When the is rotated at a high speed, unnecessary resonance may occur.

Further, as the angle between the rotation axis of the spindle motor 5 and the chassis surface is changed, the gap between the disk 3 and another component, for example, the disk tray 13 is changed. In order to secure a sufficient space between the disk 3 and other components in the above, it is necessary to design the dimensions of the apparatus in consideration of the variation in the gap between the disk 3 and other components. The optical disk device having the tilt adjustment mechanism shown in FIG. 3 has a disadvantageous structure for downsizing.

Further, since the positions of the adjusting screws 32a and 32b are below the disk 3, in order to perform the tilt adjustment based on the reproduced signal while reproducing the disk 3,
The adjustment work needs to be done under the device. For this reason, there is a problem that the configuration of the automatic assembling machine becomes complicated when the inclination is automatically adjusted during the assembling process of the apparatus.

Further, in the optical pickup tilt adjusting mechanism of the optical disk device 500 shown in FIG. 5, since the adjusting operation can be performed on the upper surface side of the device, the structure of the automatic assembler as described above is complicated. Since the spindle motor 5 is fixed on the chassis 6, the gap between the disk 3 and other components, for example, the tray 13, does not change by adjusting the optical axis.

However, in the optical disk device 500, even when the tilt of the optical axis in the tangential direction is adjusted, the tilt of the optical axis in the tangential direction changes when the optical pickup 1 moves in the radial direction X of the disk. It will be. Specifically, for example, when the tilt of the optical axis in the tangential direction is adjusted in a state where the optical pickup 1 is located at the center position of the movable range, the optical pickup 1 is moved in the disk inner circumferential direction or the outer circumferential direction. However, there is a problem that the quality of the reproduced signal is deteriorated when the movement is made.

Further, the optical disk devices 300 and 50
Any of the optical pickup tilt adjustment mechanisms of 0 can adjust the relative angle between the optical axis of the optical pickup 1 and the recording surface of the disk 3, but cannot adjust the height of the optical pickup 1 with respect to the disk. is there. For this reason, when the relative height between the optical pickup 1 and the disc 3 is shifted from the center of the movable range of the objective lens due to variations in component accuracy and assembly accuracy, the original performance cannot often be exhibited. In order to correct the relative height deviation between the optical pickup 1 and the disk 3, it is necessary to separately provide a disk height adjusting mechanism.

In the optical pickup device inclination adjusting mechanism of the optical disk device 700 shown in FIG. 7, the inclination of the optical axis in the tangential direction can be adjusted by the two guide rails 2a and 2b.
This is performed by raising or lowering either one of them in parallel, so that the inclination of the optical axis in the tangential direction due to the radial movement of the optical pickup 1 does not change in principle.
Further, the relative height between the optical pickup 1 and the disk 3 can be adjusted by rotating the adjusting screws 72a to 72d in the same direction by the same angle. Further, the spindle motor 5 is fixed on the chassis 6, and the gap between the disk 3 and other components, for example, the tray 13, does not change by adjusting the optical axis.

However, in the optical disk device 700, as with the optical disk device 300 as the first configuration example, since the adjusting screws 72a and 72b are located below the disk 3, the disk 3 is reproduced while the disk 3 is being reproduced. In order to perform the adjustment based on the reproduction signal, it is necessary to perform the adjustment work on the lower surface side of the apparatus. In addition, when adjusting the relative height between the optical pickup 1 and the disk 3, it is necessary to rotate all four adjustment screws, and when performing automatic adjustment during the assembly process of the apparatus, the configuration of the automatic assembling machine is complicated. Problem.

The present invention has been made to solve the above-mentioned problems of the prior art, and the structure of an automatic assembling machine for automatically adjusting the optical axis of an optical pickup during the assembling process of the apparatus is complicated. And the tilt of the optical axis of the optical pickup and the height of the optical pickup with respect to the disc can be adjusted while avoiding a change in the quality of the reproduced signal due to the movement of the optical pickup. The purpose is to obtain an optical disk device.

[0034]

An optical disk device according to the present invention (claim 1) is mounted on a surface of a base,
A disk drive mechanism for rotating a disk having a data recording surface, an optical pickup for irradiating a data beam on the data recording surface of the disk with a light beam to access data, and along a predetermined radial direction of the disk First and second guide rails arranged so as to face each other and slidably supporting the optical pickup in the radial direction of the disk; and first guide rails provided on the base and inclined with respect to the surface thereof. And one end of the first and second guide rails corresponds to the first and second inclined surfaces, and the other end of the first and second guide rails corresponds to the first and second guide rails. (3) A rail supporting means for supporting the guide rail by urging each end so as to abut against the fourth inclined surface, and provided on the surface of the base, and contacting each inclined surface with this. Relative to the end of the contacting guide rail By moving Do, in which an adjusting mechanism adjustable configured independently height position relative to the base surface of the respective guide rail end.

According to a second aspect of the present invention, in the optical disk device according to the first aspect, the rail support means is fixed to the base, and the inner circumference of the disk in the predetermined radial direction is closer to the outer circumference of the disk. First and second inner peripheral side rail support members having upper surfaces inclined as higher as the first and second inclined surfaces, and one end of the first and second guide rails to the respective inner peripheral surfaces. An inner peripheral side urging member for urging the upper surface side of the side rail supporting member; and a disk inner periphery supported by the base so as to be movable along the predetermined radial direction with respect to the base, in the predetermined radial direction. The first and second outer rail support members having lower surfaces inclined as higher than the disk outer peripheral side as the third and fourth inclined surfaces, and the other end of the first and second guide rails. On the lower side of each outer rail support member It is obtained by a configuration having an outer circumferential biasing member for energizing.

According to a third aspect of the present invention, in the optical disk according to the second aspect, the adjusting mechanism is configured such that the distal end is formed by the biasing force of the inner circumferential biasing member, and the other end of the first and second guide rails. The first and second screw members, which move in the predetermined radial direction by the rotation thereof in a state where they are in contact with the first and second outer rail support members, are mounted on the disk in the predetermined radial direction. An outer peripheral urging member that urges the outer peripheral side, and its tip rotates in a state where the distal end is in contact with the outer peripheral end of the first and second outer rail support members by the urging force of the outer peripheral urging member. And the third and fourth screw members moving in the predetermined radial direction.

[0037]

FIG. 1 is a diagram for explaining an optical disk device according to an embodiment of the present invention. FIG. 1 (a) is a plan view, and FIG. 1 (b) is Ib of FIG. 1 (a). -Ib line sectional view, FIG.
(c) and FIG. 1 (d) are enlarged views showing a C portion and a D portion (portion surrounded by a chain line) in FIG. 1 (a).

The optical disk device 100 of this embodiment
Is a conventional optical disk device 30 shown in FIGS.
Similarly to 0,500,700, a spindle motor 5 for rotating a disk 3 having a data recording surface, and an optical pickup 1 for irradiating a data beam on the data recording surface of the disk 3 to access data. The optical pickup 1 is disposed so as to be opposed to each other along a predetermined radial direction X of the disk 3, and the optical pickup 1 is moved in the radial direction X of the disk 3.
First and second guide rails 2a slidably supported by
2b.

In this embodiment, the spindle motor 5 is fixed on the surface of the chassis 6, and
Both ends of the first and second guide rails 2a and 2b are supported so as to be movable in the normal direction of the surface of the chassis 6 and in the predetermined radial direction X.

That is, the optical disk device 1 of the present embodiment
Reference numeral 00 denotes a first and a first support rails which are provided corresponding to the guide rails 2a and 2b, and which support both ends of the guide rails so as to be movable in the normal direction of the surface of the chassis 6 and the predetermined radial direction X. It has two support mechanisms 100a and 100b.

The first support mechanism 100a includes the first support mechanism 100a.
An inner peripheral side support portion 100a1 for supporting an inner peripheral end portion of the guide rail 2a of the disc, and the first guide rail 2a
Outer peripheral supporting portion 100a for supporting the outer peripheral end of the disk
And 2.

The inner peripheral side support portion 100a1 has one end located above the inner peripheral end of the guide rail 2a and the other end fixed to the chassis 6 and a component support piece 11a. An inner rail guide member 9 having an upper surface fixed to face an upper portion of the component support piece 11a and supporting an inner peripheral end of the guide rail 2a on the upper surface.
Attached to the upper part of the component support piece 11a,
A spring member 8a for urging the inner peripheral end of the guide rail 2a downward and to the outer peripheral side of the disk in the radial direction X.
And Here, a groove 9a is formed in the upper surface of the inner peripheral side rail guide member 9 along the radial direction X, and a bottom surface 9b of the groove 9a is formed in the radial direction X so as to be closer to the outer side of the disk. It is an inclined surface that is inclined to be lower.

The outer peripheral side support portion 100a2 has a component support piece 11b having one end located above the outer peripheral end of the guide rail 2a and the other end fixed to the chassis 6.
The radial direction X along the upper back surface of the component support piece 11b
An outer peripheral side rail guide member 10 which is slidably disposed and whose lower surface faces the outer peripheral side end of the guide rail 2a;
A spring 8b is provided between the outer peripheral end of the guide rail 2a and the chassis 6, and biases the outer peripheral end so as to contact the lower surface of the outer rail guide member 10. . And, the outer peripheral side rail guide member 10
An urging spring 8c for urging the member 10 toward the outer periphery of the disk along the radial direction X is mounted on the inner peripheral side of the disk. The component support piece 11b has an adjusting screw 112a having a tip end provided with the outer peripheral side rail guide member 10.
The screw is screwed so as to abut against the outer peripheral end of the disc, and the tip of the adjusting screw 12c is
a is screwed into contact with the outer peripheral end of the disk.

The second support mechanism 100b for supporting the second guide rail 2b is also provided with the first support mechanism 10b.
0a, an inner peripheral side support portion 100b1 for supporting the inner peripheral side end of the disk of the second guide rail 2b, and an outer peripheral side support portion 100b2 for supporting the outer peripheral side end of the second guide rail 2b. Each of the support portions 100b1 and 100b2 is provided with the first support mechanism 10
It has exactly the same configuration as the respective support portions 100a1 and 100a2 similar to 0a.

The component support piece 11b of the outer peripheral support portion 100b2 of the support mechanism 100b has an adjusting screw 12b instead of the adjusting screw 12a. The adjusting screw 12d is screwed so as to abut on the guide rail 2b instead of the adjusting screw 12c.
Are screwed into contact with the outer peripheral end of the disc.

Next, referring to FIG.
A method of adjusting the optical axis and the height position of the optical pickup at 00 will be described. As shown in FIG.
By rotating the adjusting screws 12a and 12b in the same direction by the same angle, the outer-side rail guide member 10 moves in the disk radial direction, and the outer-side ends of the rails 2a and 2b move up and down accordingly. Of one optical axis,
Adjustment of the relative inclination in the radial direction with respect to the recording surface of the disk 3 is performed.

Next, as shown in FIG.
By rotating one of the guide rails 2c and 12d, one of the guide rails 2a and 2b is moved in the disk radial direction X.
While moving up and down along the slope 9b of the inner rail guide member 9 and the slope 10a of the outer rail guide member 10, the optical axis of the optical pickup 1 relative to the recording surface of the disk 3 in the tangential direction. Adjustment of the tilt is performed.

Further, as shown in FIG. 2 (c), by rotating the adjusting screws 12c and 12d in the same direction by the same angle, the guide rails 2a and 2b move in the disk radial direction X, and Slope 9a of side rail guide member 9
The optical pickup 1 is moved up and down along the slope 10a of the outer rail guide member, and the relative height of the optical pickup 1 with respect to the recording surface of the disk 3 is adjusted.

As described above, in this embodiment, the guide rails are provided corresponding to the two guide rails 2a and 2b which slidably hold the optical pickup 1, and each guide rail is arranged in a direction perpendicular to the surface of the chassis 6. And the first and second support mechanisms 100a and 100b that support the other end so as to be able to move parallel to the other end and the other end as a fulcrum. The relative inclination of the optical pickup with respect to the recording surface of the disc can be adjusted independently of the above-mentioned relative inclination of the optical pickup with respect to the recording surface of the disk in the radian direction and the tangential direction. You can do it.

That is, in the support mechanism, since the two guide rails 2a and 2b move independently and in parallel, there is a disadvantage that the inclination in the tangential direction changes when the optical pickup 1 moves in the radial direction of the disk. In addition, the height of the optical pickup 1 with respect to the disk can be adjusted.

In the support mechanisms 100a and 100b, adjusting screws 12a to 12d for adjusting the relative inclination of the optical axis of the optical pickup 1 in the radian direction and the tangential direction with respect to the recording surface of the disk 3 are provided on the surface of the chassis 6. Since it is provided on the side, the adjustment work can be performed on the upper surface side of the apparatus, and therefore, the configuration of the automatic assembler does not become complicated.

Further, the spindle motor 5 is connected to the chassis 6
, The occurrence of resonance in the high-speed rotation state of the disk can be suppressed, and the inclination of the optical axis of the optical pickup in the radial and tangential directions with respect to the disk recording surface can be adjusted by adjusting the attitude of the spindle motor 5. Rather than adjusting the position of the guide rail supporting the optical pickup, the margin of the gap between the disk and other components such as the disk tray does not decrease with the optical axis adjustment. Therefore, it is possible to realize a compact optical disk device by minimizing the space between components.

[0053]

As described above, according to the optical disk device of the present invention (claim 1), the optical disk device is provided on the base,
One end of the first and second guide rails having first to fourth inclined surfaces inclined with respect to the surface thereof and slidably holding the optical pickup are connected to the first and second inclined surfaces. The other end of the first and second guide rails is connected to the third and fourth guide rails.
Rail support means for supporting each guide rail by urging each end so as to abut against the inclined surface of the base rail, so that each guide rail is translated in a direction perpendicular to the surface of the base and one end thereof The other end can be rotated about the fulcrum. This makes it possible to independently adjust the relative tilt of the optical axis of the optical pickup in the radian direction and the tangential direction with respect to the recording surface of the disk, and to adjust the relative height of the optical pickup with respect to the recording surface of the disk in the radian. The adjustment of the relative inclination in the direction and the tangential direction can be performed independently.

That is, in the supporting mechanism, since the two guide rails move independently and in parallel, there is no problem that the inclination in the tangential direction changes when the optical pickup moves in the radial direction of the disk. The height of the optical pickup with respect to the disk can also be adjusted.

The adjusting mechanism for adjusting the relative inclination of the optical axis of the optical pickup in the radian direction and the tangential direction with respect to the recording surface of the disk is provided on the front side of the substrate. It can be performed on the top side of the device, so that the configuration of the automatic assembler does not become complicated.

Further, since the disk drive mechanism for rotating the disk having the data recording surface is mounted on the surface of the base, it is possible to suppress the occurrence of resonance when the disk is rotating at a high speed. Moreover, the inclination of the optical axis of the optical pickup with respect to the disk recording surface in the radial and tangential directions is adjusted not by changing the attitude of the disk drive mechanism but by changing the attitude of the guide rail that supports the optical pickup. The adjustment does not reduce the margin of the gap between the disk and the other components such as the disk tray, so that the space between the components can be made as small as possible to realize a compact optical disk device.

According to the present invention (claim 2), claim 1
In the optical disc device described in the above, the rail support means is constituted by a rail guide member partially having each inclined surface, and an urging member for urging the end of each rail to each inclined surface. With a simple configuration, a support mechanism capable of moving the guide rail in a direction perpendicular to the surface of the base and rotating the other end with one end as a fulcrum can be realized.

According to the present invention (claim 3), claim 2
In the optical disc described above, in the adjusting mechanism, parallel movement of each guide rail in a direction perpendicular to the surface of the base is performed by first and second screw members, and the other end having one end side of each guide rail as a fulcrum. Since the side rotation is performed by the third and fourth screw members, the adjustment of the optical axis and the height position of the optical pickup can be easily performed by rotating the screw.

[Brief description of the drawings]

FIG. 1 is a view for explaining an optical disk device according to an embodiment of the present invention, wherein FIG. 1 (a) is a plan view, FIG. 1 (b) is a cross-sectional view taken along line Ib-Ib of FIG. 1 (a), FIG. 1 (c) and FIG. 1 (d)
FIG. 2 is an enlarged view showing a C portion and a D portion (portion surrounded by a dashed line) in FIG.

FIG. 2 is a diagram showing a method of adjusting an optical axis of an optical pickup in the optical disk device of the embodiment.

FIG. 3 is a diagram showing a first configuration example of a conventional optical disk device, where FIG. 3 (a) is a plan view, and FIG. 3 (b) is IIIb of FIG. 3 (a).
FIG. 3 is a sectional view taken along a line IIIb.

FIG. 4 is a diagram showing how to adjust the optical axis of the optical pickup in the conventional optical disk device shown in FIG.

5A and 5B are diagrams showing a second configuration example of the conventional optical disk device, wherein FIG. 5A is a plan view, and FIG. 5B is a view showing Vb-V in FIG.
FIG. 5 is a sectional view taken along line Vb.

FIG. 6 is a diagram showing how to adjust the optical axis of the optical pickup in the conventional optical disk device shown in FIG.

7A and 7B are diagrams showing a third configuration example of a conventional optical disk device, wherein FIG. 7A is a plan view, and FIG. 7B is a VIIb of FIG. 7A.
FIG. 7 is a sectional view taken along line -VIIb.

8 is a diagram showing how to adjust the optical axis of the optical pickup in the conventional optical disk device shown in FIG.

[Explanation of symbols]

 Reference Signs List 1 optical pickup 2a, 2b rail 3 disk 4 feed motor 5 spindle motor 6 chassis 7 turntable 8 spring member 9 inner rail guide member 9a groove 9b inclined surface 10 outer rail guide member 10a inclined surface 11a, 11b component support piece 12a, 12b, 12c, 12d Adjusting screw 13 Tray

Claims (3)

[Claims] 1. A disk drive mechanism mounted on a surface of a base for rotating a disk having a data recording surface, and a data drive for irradiating a data beam on the data recording surface of the disk with a light beam to access data. An optical pickup, first and second guide rails disposed so as to face each other along a predetermined radial direction of the disk, and supporting the optical pickup so as to be slidable in the radial direction of the disk; A first provided on the top and inclined with respect to its surface
Or a fourth inclined surface, and one end of the first and second guide rails is connected to the first and second inclined surfaces by the first and second inclined surfaces.
Rail supporting means for supporting the guide rails by urging the respective ends so that the other end of the second guide rail comes into contact with the third and fourth inclined surfaces; And an adjusting mechanism having a configuration in which the height position of each guide rail end with respect to the base surface can be independently adjusted by relative movement between each of the inclined surfaces and the end of the guide rail abutting on the inclined surface. An optical disk device comprising: 2. The optical disk device according to claim 1, wherein said rail support means is fixed to said base and is inclined such that an inner peripheral side of said disk is higher than an outer peripheral side of said disk in said predetermined radial direction. First and second inner peripheral rail supporting members having the first and second inclined surfaces, and one end of the first and second guide rails on the upper surface side of each of the inner peripheral rail supporting members. An inner peripheral side urging member that urges the base, and is movably supported along the predetermined radial direction with respect to the base, and the disk inner peripheral side is higher than the disk outer peripheral side in the predetermined radial direction. First and second outer peripheral rail support members having the inclined lower surfaces as the third and fourth inclined surfaces, and the outer peripheral rail support members having the other end of the first and second guide rails. Outer side urging section that urges the lower side of the Optical disc apparatus, characterized in that with and. 3. The optical disc according to claim 2, wherein the adjusting mechanism is configured such that a tip of the adjusting mechanism contacts the other end of the first and second guide rails by the biasing force of the inner circumferential biasing member. First and second screw members that move in the predetermined radial direction by rotation, and outer circumferences that urge the first and second outer rail support members toward the disk outer circumference in the predetermined radial direction A side urging member, the tip of which is in contact with the outer peripheral end of the first and second outer rail support members by the urging force of the outer peripheral urging member, and is rotated in the predetermined radial direction by its rotation. 3rd and 4th moving
An optical disk device comprising: a screw member;