JP2001052346A - Optical pickup adjusting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly make tangential tilt adjustments of the optical pickup of an optical disk drive, which records and reproduces a high-density and high- capacity type disk type recording medium, such as a DVD, by moving up and down a guide rail in parallel to and away from the surface of the disk. SOLUTION: This mechanism is equipped with sub-shaft support parts 31a and 31b, which support both the end parts of a sub-shaft 30, guiding the radial movement of an optical disk 10, rotatably on a base and a moving means (sub- shaft adjusting screw) 32 which moves the sub-shaft 30 radially to and away from a base chassis 3. When the sub-shaft 30 is moved radially by the moving means 32, the sub-shaft support parts 31a and 31b rotate both the end parts of the sub-shaft 30 on axes of rotation to displace the sub-shaft 30 perpendicularly to the surface of the disk, thereby making tangential tilt adjustments 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 a recording / reproducing apparatus for recording / reproducing a high-density / high-capacity disk-shaped recording medium such as a DVD, and more particularly, to a small and thin type used as a peripheral device for home video equipment and computers. The present invention relates to an optical pickup device for adjusting the angle by swinging the optical pickup together with a guide axis so that the optical axis of the optical pickup is perpendicular to the disk recording surface.

[0002]

2. Description of the Related Art At present, a DV having a recording capacity eight times that of a CD is known.
D is in the limelight, and DVD players and DVD-ROMs using optical disks of the DVD format have already begun to enter the market.

Generally, when the recording surface of an optical disk is inclined with respect to the optical axis of an objective lens, a wavefront aberration occurs in proportion to the cube of the NA value (numerical aperture) of the optical system. However,
In the DVD, the NA value of the optical system of the optical pickup is set (0.6) larger than the CD (0.45) in order to perform high-density recording and reproduction. For this reason, a slight inclination of the optical axis greatly deteriorates the jitter.

Therefore, in a DVD optical disk device,
In order to improve the jitter, a mechanism for adjusting the tilt angle (the tilt angle between the optical axis of the optical pickup and the disk recording surface) is required. The tilt angles to be adjusted include two-axis adjustment tilt angles of radial tilt (inclination in the disc radial direction) and tangential tilt (inclination in the disc tangential direction).

As a mechanism for adjusting the radial tilt, there is a mechanism for tilting an objective lens. With this adjustment mechanism, the tilt angle can be adjusted within the height of the optical pickup, so that it has a feature that it is suitable for making the device thinner.

An optical pickup adjustment mechanism having such a function is disclosed in Japanese Patent Application Laid-Open No. 09-022537. This publication discloses a tilt in which a permanent magnet is fixed to a movable body to which an objective lens is fixed, and a current flowing through two focusing coils fixed to a fixed base is adjusted to tilt the objective lens in a radial direction. An adjustment mechanism is described.

As a mechanism for adjusting the tangential tilt, there is a mechanism for inclining the disk motor, a mechanism for inclining the guide shaft, and the like. Among these adjusting mechanisms, the mechanism for inclining the disk motor has poor adjustment sensitivity. The inclination of the guide shaft has a characteristic that the adjustment sensitivity is relatively good.

An optical pickup adjusting mechanism having such a function is disclosed in Japanese Patent Application Laid-Open No. H10-116479. According to this publication, the outer end of a sub shaft that supports the movement of the optical pickup in the disk radial direction can be adjusted in the direction facing the disk, and while the optical pickup is held at the intermediate radius position, the swing of the sub shaft is Describes an optical pickup adjustment mechanism for adjusting the tangential tilt.

[0009]

However, in the tangential tilt adjusting mechanism having the above-described structure, the mechanism for adjusting the outer peripheral end of the sub-shaft requires the inner or outer peripheral position of the disk after the tangential tilt adjustment of the optical pickup. Had a problem that tangential tilt remained.

An object of the present invention is to solve the above-mentioned problems and to provide an optical pickup adjustment mechanism having no residual tangential tilt.

[0011]

To achieve the above object, an optical pickup adjusting mechanism according to the present invention is characterized in that an optical pickup for recording or reproducing a signal on a disk and a disk motor for rotating the disk are provided. An optical disc device comprising: a base supporting the disc motor; and a guide rail supporting the optical pickup and guiding the disc in a radial direction.
An optical pickup adjustment mechanism for adjusting an angle of the optical pickup with respect to a disk surface, wherein a rotation axis is a direction perpendicular to the guide rail and parallel to the surface of the disk, and both ends of the guide rail with respect to the base. A supporting member for rotatably supporting the guide rail, and a moving means for moving the guide rail in the radial direction with respect to the base, wherein the moving means moves the guide rail in the radial direction. The invention is characterized in that both ends of the guide rail are rotated around the rotation axis, and the guide rail is displaced in a direction perpendicular to the surface of the disk.

According to a second aspect of the present invention, an optical pickup for recording or reproducing a signal on or from a disk, a disk motor for rotating the disk, a base for supporting the disk motor, and a base for supporting the optical pickup, An optical pickup device that adjusts the angle of the optical pickup with respect to the disk surface, wherein the direction is parallel to the guide rail and parallel to the surface of the disk. A support member that rotatably supports both ends of the guide rail with respect to the base as a rotation axis;
Moving means for moving the guide rail relative to the base in a direction perpendicular to the guide rail, and moving the guide rail in a direction perpendicular to the guide rail by the moving means. The invention is characterized in that both ends are rotated around the rotation axis, and the guide rail is displaced in a direction perpendicular to the surface of the disk.

According to a third aspect of the present invention, the rotation axis of the optical pickup adjusting mechanism according to the first or second aspect is configured such that a first coupling portion between both ends of the guide rail and the support member, and a base and the support member. It is characterized in that it is provided at the second coupling portion.

According to a fourth aspect of the present invention, the rotation axis of the optical pickup adjustment mechanism according to the first or second aspect is provided at a joint between the guide rail at both ends and the support member or at a joint between the base and the support member. And the support member is fixed to the base or the guide rail via an elastic member.

According to a fifth aspect, the support member of the optical pickup adjustment mechanism according to the fourth aspect is an elastic member.

According to a sixth aspect, in the optical pickup adjusting mechanism according to any one of the first to fifth aspects, the optical pickup is supported by at least a pair of guide rails,
A support member and a moving means are provided on both of the two guide rails, and when one of the guide rails is adjusted in a direction away from the surface of the disk, simultaneously, the other guide rail is brought closer to the surface of the disk. It is characterized by adjusting to.

According to a seventh aspect, in the optical pickup adjusting mechanism according to any one of the first to sixth aspects, a spring is provided for urging the guide rail in a direction perpendicular to the rotation axis.
It is characterized in that an urging force is applied to the moving means.

According to an eighth aspect of the present invention, in the optical pickup adjustment mechanism according to any one of the first to seventh aspects, the moving means acts on the center of the guide rail in the longitudinal direction to move the guide rail. It is a feature.

According to a ninth aspect, in the optical pickup adjusting mechanism according to any one of the first to seventh aspects, the moving means acts on at least one of both ends of the guide rail to move the guide rail. It is characterized by the following.

According to a tenth aspect, in the optical pickup adjustment mechanism according to any one of the first to ninth aspects, the moving means is arranged outside the projection area of the disk.

According to an eleventh aspect, in the optical pickup adjustment mechanism according to any one of the first to fifth aspects, the support member and the base or the support member and the guide rail are integrally formed. Things.

According to a twelfth aspect, in the optical pickup adjusting mechanism according to any one of the first to fifth aspects, the guide rail, the support member, and the base are integrally formed.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a partially transparent perspective view showing a configuration of an optical pickup adjusting mechanism according to Embodiment 1 of the present invention. In FIG. 1, an optical pickup 1
Performs at least one of recording and reproducing a signal with respect to the optical disc 10. The disk motor 2 holds and rotates the optical disk 10. The guide rails 20, 30 support the optical pickup 1 and guide the movement in the disk radial direction. Hereinafter, the guide rail 20 is referred to as a main shaft 20, and the guide rail 30 is referred to as a sub shaft 30.

The spindle 20 supports the optical pickup 1 and guides the operation of the optical pickup 1 moving in the radial direction from the inner circumference to the outer circumference of the disk 10 and from the outer circumference to the inner circumference. Counter shaft 3
Reference numeral 0 denotes an optical pickup 1
I support. That is, the optical pickup 1 can move in the axial direction along the main shaft 20 and the sub shaft 30. Further, the optical pickup 1 is driven by a drive source (not shown) so as to be movable in the disk radial direction along the main shaft 20 and the sub shaft 30.

Both ends of the main shaft 20 and the sub shaft 30 are supported by main shaft support portions 21a and 21b and sub shaft support portions 31a and 31b attached to the base chassis 3, respectively. In the first embodiment, the counter shaft support portions 31a, 31
b is made of an elastic body, and one end of each is
, And each other end is a countershaft 3 at both ends of the countershaft 30.
The sub-shaft 30 is rotatably supported on the base chassis 3 via a rotating shaft perpendicular to the zero axis direction 30A and parallel to the optical disc 10 in a direction 10A.

The variable sub-shaft mechanism 35 comprises a sub-shaft 30, sub-shaft support portions 31a and 31b, and a sub-shaft adjusting screw 32, which adjusts the movement of the sub-shaft 30 in the axial direction 30A.
The movement of the counter shaft 30 in the height direction 30B can be adjusted. The tilt angle of the optical pickup 1 can be adjusted by moving the sub shaft 30 in the height direction 30B.

The objective lens driving device 40 includes the optical disc 1
In order to correct the focusing deviation due to the vertical movement of the warpage of 0, the tracking deviation due to eccentricity, and the relative inclination between the optical disk 10 and the objective lens, the objective lens is moved in a direction perpendicular to the optical disk 10 (focusing direction) and the radius of the optical disk 10. Direction (tracking direction)
The optical disc 10 is mounted on the optical pickup 1 by being driven in three axes of a rotation direction (radial direction) around a tangential direction of the optical disc 10. Further, the objective lens driving device 40 can adjust the tilt angle of the optical axis of the optical disc 10 and the optical pickup 1.

Next, the operation of adjusting the tilt angle of the objective lens driving device 40 according to the first embodiment will be described with reference to FIGS. FIG. 2 is a partially transparent perspective view showing the configuration of the objective lens driving device. The objective lens driving device 40 adjusts the tilt angle between the optical axis of the optical pickup and the recording surface of the optical disk in the disk radial direction (radial direction). In FIG. 2, T is a tracking direction parallel to the radial direction of the optical disc 10, F is a focusing direction perpendicular to the optical disc 10, and K is a direction perpendicular to the focusing direction F and the tracking direction T.

The objective lens driving device 40 includes a movable body 50,
Bobbins 46a to 46d, wire members 51a to 51d,
It comprises a suspension holder 52 and a fixed base 53. The movable body 50 includes a lens holder 42 on which the objective lens 41 is mounted, and two permanent bodies arrayed and fixed to the lens holder 42 symmetrically with respect to a plane including the optical axis J of the objective lens 41 and perpendicular to the tracking direction T. Magnets 43a-
43d.

The bobbins 46a to 46d are formed by resin-molding flat opposing yokes 45a to 45d made of a magnetic material. In addition, bobbins 46a to 46d include
Each has a tracking coil 47a-47d wound with a winding axis in the tracking direction T, a focusing coil 48a-48d wound with a winding axis in the focusing direction F, and a winding axis in the focusing direction F. Tilt coils 49a wound and each connected in series
Three types of coils of up to 49d are wound. Movable body 5
The wire members 51a to 51d supporting the zero are made of a conductive material that is substantially parallel bar-shaped support members having an axis in the direction K. Wire members 51a-
One end of each of 51d is connected to the lens holder 42,
The other end is connected to a suspension holder 52 fixed to a fixed base 53.

Therefore, the movable body 50 is connected to the wire member 5
1a to 51d support the fixed base 53 so as to be movable in the focusing direction F, the tracking direction T, and the rotation direction around the direction K.

Next, the driving operation of the objective lens driving device in three axial directions will be described. FIG. 3 is a schematic diagram of a main part of the objective lens driving device. In FIG. 3, Ha to Hd are the directions of magnetization of the permanent magnets 43a to 43d. First, in the driving in the tracking direction T, the magnetic force generated by the permanent magnets 43a to 43d fixed to the lens holder 42 receives an electromagnetic force obtained by being orthogonal to the current flowing through the tracking coils 47a to 47d. 42 is supported by the wire members 51a to 51d and substantially translated in the tracking direction T.

The driving in the focusing direction F is
Permanent magnets 43a-4 fixed to lens holder 42
The magnetic flux generated by 3d is generated by focusing coils 48a to 48d.
The lens holder 42 receives an electromagnetic force obtained by being orthogonal to the current flowing through the wire members 48d, and the wire members 51a to 5d.
1d, obtained by substantially translating in the focusing direction F.

Next, the tilt drive, which is a drive in the rotational direction around the direction K, is performed as follows. Tilt coil 49
a to 49d are connected in series, and the direction of the flowing current is the direction of Ia to Id shown in FIG. Accordingly, since the permanent magnets 43a to 43d receive the reaction force generated in the tilt coils 49a to 49d, a rotational moment in the direction of M is generated in the movable body 50, and the lens holder 42 is supported by the wire members 51a to 51d. It can rotate in a rotational direction (radial direction) around the direction K.

Therefore, the tilt coils 49a-49
By energizing d, the tilt angle (radial direction) between the optical disk 10 and the optical axis J of the objective lens 41 is adjusted.

Next, the counter shaft 30 according to the first embodiment will be described.
The operation of the sub shaft variable mechanism 35 will be described with reference to FIGS. FIG. 4 is a diagram illustrating the variable sub-shaft mechanism 35. In FIG. 4, 30A is the axial direction of the countershaft 30, 30B
Is a height direction of the sub shaft 30 which is a normal direction of the base chassis 3.

The variable sub-shaft mechanism 35 adjusts the inclination of the optical axis of the optical pickup 1 and the recording surface of the optical disk in the tangential direction (tangential direction) of the disk. Counter shaft variable mechanism 3
Reference numeral 5 includes a countershaft 30, countershaft support portions 31a and 31b, and a countershaft adjusting screw 32, and is attached to the base chassis 3.

The two sub shaft support portions 31a and 31b supporting both ends of the sub shaft 30 are formed of elastic members, one ends of which are fixed to the base chassis 3 at the support points a1 and b1, respectively, and the other ends thereof are the sub shafts. 30 at both ends, perpendicular to the axial direction 30A,
In addition, the sub shaft 30 is rotatably supported on the base chassis 3 via rotation shafts a2 and b2 in a direction parallel to the optical disk 10. In the first embodiment, the counter shaft support portions 31a,
31b is made of a plate-shaped resin spring, and the height from the base chassis 3 to the rotation axes a2 and b2 is made the same. Further, by reducing the thickness in the vicinity of the rotation axes a2 and b2, the sub shaft 30 can be moved relative to the base chassis 3 by the rotation axes a2 and b2.
It is supported rotatably around.

The counter shaft adjusting screw 32 is used to move the counter shaft 30 in the axial direction 3.
It is adjusted so that it can move to 0A and pushes one end of the counter shaft 30 in the axial direction 30A. When one end of the sub shaft 30 is pushed in the axial direction 30A by the sub shaft adjustment screw 32, the counter shaft 30 is attached to the sub shaft 30 in the direction of the sub shaft adjustment screw 32 by the reaction force of the elastic deformation of the sub shaft support portions 31a and 31b. The force P is generated, and the counter shaft 30 can be urged in the axial direction 30A.

The rotation of the counter shaft adjusting screw 32 causes the counter shaft 30 to rotate.
Is moved in the axial direction 30A, the sub shaft supporting portions 31a, 31b are elastically deformed in the directions of Ma, Mb, respectively, with the supporting points a1, b1 as fulcrums, via the rotating shafts a2, b2 at both ends of the sub shaft 30. Therefore, the sub shaft 30 can move in the axial direction 30A and also in the height direction 30B. In other words, the sub shaft adjusting screw 32 is connected to the sub shaft 3 in FIG.
It is possible to adjust the movement of the counter shaft from the first position (broken line portion) to the second position (solid line portion).

Therefore, the variable sub-shaft mechanism 35 can adjust the height of the sub-shaft 30 in the height direction 30B in parallel with the optical disk 10 by rotating the sub-shaft adjusting screw 32.

FIG. 5 is a conceptual diagram of the tangential tilt adjustment according to the first embodiment. As shown in FIG. 5, a plane M0 formed by the main shaft 20 and the sub shaft 30 is such that the sub shaft 30 is parallel to the main shaft 20 in the height direction 3 of the sub shaft 30.
0B, the main shaft 20 serves as a rotation axis,
The plane M0 becomes a new plane M1 inclined by θt in the tangential direction with respect to the plane M0.

A plane M0 formed by the main shaft 20 and the sub shaft 30
Since M1 and M1 are movement locus surfaces when the optical pickup 1 moves in the disk radial direction, by moving the sub shaft 30 parallel to the main shaft 20, the optical pickup 1 tilts θt in the tangential direction. Since the parallel relationship between the main shaft 20 and the sub shaft 30 is maintained, the inclination θt does not change from the inner circumference to the outer circumference of the optical disc 10.

Therefore, the tilt of the optical pickup 1 in the tangential direction can be adjusted uniformly from the inner circumference to the outer circumference of the optical disk 10 by the variable sub-shaft mechanism 35.

Incidentally, the variable auxiliary shaft mechanism 35 of the first embodiment
Includes the configuration shown in FIG. FIG. 6 is a diagram showing another form of the variable sub-shaft mechanism 35 according to the first embodiment. In FIG. 6, the base chassis 3 for fixing the sub shaft support portions 31a and 31b includes an optical disk 10 and a sub shaft 30.
Located in the space between. Accordingly, the sub shaft 30 is supported by being suspended from the base chassis 3 on the upper surface.

The sub shaft 30 is moved in the axial direction 3 by a sub shaft urging spring 33 for urging one end of the sub shaft 30 in the axial direction 30A.
It may be biased to 0A.

In the first embodiment, the sub shaft support portions 31a and 31b and the base chassis 3 or the sub shaft support portions 31a and 31b and the sub shaft 30 are integrally formed by, for example, a resin material. Is also good.

In the first embodiment, the sub shaft 30
The sub-shaft support portions 31a and 31b and the base chassis 3 may be integrally formed of, for example, a resin material.

(Embodiment 2) FIG. 7 is a partially transparent perspective view showing a configuration of an optical pickup adjusting mechanism according to Embodiment 2 of the present invention. In FIG. 7, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
The main shaft 20 and the sub-shaft 30 are both a main shaft variable mechanism 25 (see FIG. 8) and a sub-shaft variable mechanism 35 (see FIG. 9).
Is different from the first embodiment in that the height is adjusted in the height direction 20B or 30B.

In the variable secondary shaft mechanism 35 according to the second embodiment, two sub shaft support portions 31a and 31b supporting both ends of the sub shaft 30 are provided at both ends of the base chassis 3 and the end of the sub shaft 30, respectively. The optical disk 1 perpendicular to the axial direction 30A and
The countershaft 3 is connected via two rotating shafts in a direction 10A parallel to 0.
0 is rotatably supported with respect to the base chassis 3, and biases one end of the counter shaft 30 in the axial direction 30A.
3 is different from the first embodiment.

The variable main shaft mechanism 25 supports the main shaft 20 with the same configuration as the above-described variable sub shaft mechanism 35, and is different from the first embodiment in that it is supported by the base chassis 3 on the upper surface of the main shaft 20. I have.

Next, the operation of the spindle variable mechanism 25 of the spindle 20 according to the second embodiment will be described with reference to FIG. FIG. 8 is a diagram showing the variable spindle mechanism 25. 8, 20A is the axial direction of the main shaft 20, and 20B is the height direction of the main shaft 20, which is the normal direction of the base chassis 3.

The variable spindle mechanism 25 adjusts the inclination of the optical axis of the optical pickup 1 and the recording surface of the optical disk in the tangential direction (tangential direction) of the disk. Spindle variable mechanism 2
Reference numeral 5 denotes a main shaft 2, main shaft support portions 21a and 21b, a main shaft adjusting screw 22, and a main shaft urging spring 23.
0 is attached to the base chassis 3 on the upper surface.

One end of each of the two main shaft support portions 21a and 21b supporting both ends of the main shaft 20 is connected to the base chassis 3 via rotating shafts a3 and b3 perpendicular to the axial direction 20A and parallel to the optical disk 10. The main shaft 20 is rotatably supported on the base chassis 3 via rotating shafts a2 and b2 whose other ends are perpendicular to the axial direction 20A and are parallel to the optical disk 10. In the second embodiment,
The rotating shafts a3 and b3 at the joints between the main shaft supporting portions 21a and 21b and the base chassis 3 are supported by pins, respectively. By supporting the pins, the spindle 20
Is rotatably supported with respect to the base chassis 3. In other words, the main shaft 20, the main shaft support portions 21a and 21b, and the base chassis 3 constitute a link mechanism. Also,
In FIG. 8, the base chassis 3 supporting the spindle support portions 21a and 21b is located in a space between the optical disk 10 and the spindle 20, and the spindle 20 is supported by being suspended from the base chassis 3 on the upper surface.

The spindle adjusting screw 22 is used to move the spindle 20 in the axial direction 2.
The main shaft 20 is attached so as to be movably adjusted to 0A and push one end of the main shaft 20 in the axial direction 20A. Also, the spindle 20
Is biased in the axial direction 20A by a main shaft biasing spring 23 which biases one end in the axial direction 20A.

The rotation of the spindle adjusting screw 22 causes the spindle 20 to rotate.
Is moved in the axial direction 20 </ b> A, the main shaft support portions 21 a, 21 b and the link mechanism constituted by the base chassis 3 act to link the main shaft support portions 21 a, 21 b at the joint portion with the base chassis 3. Rotating axes a3, b3
The main shaft 20 can move in the axial direction 20A and also in the height direction 20B. In other words, the spindle adjusting screw 22
Can adjust the movement of the main shaft 20 from the first position (broken line portion) in FIG. 8 to the second position (solid line portion) of the main shaft.

Therefore, the spindle variable mechanism 25 can adjust the height of the spindle 20 in the height direction 20B in parallel with the optical disk 10 by rotating the spindle adjustment screw 22.

Next, in the second embodiment, the sub shaft 30
The operation of the variable sub shaft mechanism 35 will be described with reference to FIG. FIG. 9 is a diagram illustrating the variable sub-shaft mechanism 35. FIG.
In the figure, 30A is the axial direction of the sub shaft 30, and 30B is the height direction of the sub shaft 30 which is the normal direction of the base chassis 3.

The variable sub shaft mechanism 35 adjusts the inclination of the optical axis of the optical pickup 1 and the recording surface of the optical disk in the tangential direction (tangential direction) of the disk. Counter shaft variable mechanism 3
5 includes a countershaft 30, countershaft support portions 31a and 31b, a countershaft adjusting screw 32, and a countershaft biasing spring 33,
0 is attached to the base chassis 3 on the lower surface.

One end of each of the two sub shaft support portions 31a and 31b supporting both ends of the sub shaft 30 is connected to the base chassis 3 by rotating shafts a3 and b3 perpendicular to the axial direction 30A and parallel to the optical disk 10. And the other end is rotatably supported on the base chassis 3 via the rotating shafts a2 and b2, the other ends of which are perpendicular to the axial direction 30A and parallel to the optical disk 10. I do. In the second embodiment,
The rotating shafts a3 and b3 at the connecting portions between the counter shaft support portions 31a and 31b and the base chassis 3 are supported by pins, respectively, and the rotating shafts a2 and at the connecting portions at both ends of the counter shaft supporting portions 31a and 31b and the counter shaft 30 are provided. By supporting each of the pins b2 with a pin,
Is rotatably supported with respect to the base chassis 3. In other words, the sub shaft 30, the sub shaft support portions 31a and 31b, and the base chassis 3 constitute a link mechanism. Also,
In FIG. 9, the base chassis 3 supporting the sub shaft support portions 31a and 31b is located below the sub shaft 30,
Is supported by being lifted from the base chassis 3 on the lower surface.

The sub shaft adjusting screw 32 is used to move the sub shaft 30 in the axial direction 3.
It is adjusted so that it can move to 0A and pushes one end of the counter shaft 30 in the axial direction 30A. Also, the countershaft 30
Is urged in the axial direction 30A by a sub-shaft urging spring 33 that urges one end in the axial direction 30A.

The rotation of the sub shaft adjusting screw 32 causes the sub shaft 30 to rotate.
Is moved in the axial direction 30 </ b> A, the link mechanism composed of the sub shaft 30, the sub shaft support portions 31 a, 31 b, and the base chassis 3 causes the sub shaft support portions 31 a, 31 b to connect with the base chassis 3. Rotation axes a3, b3 at the joint
Is rotated in the directions of Ma and Mb around the axis, so that the sub shaft 30 can move in the axial direction 30A and also in the height direction 30B. In other words, the counter shaft adjustment screw 32
Can adjust the movement of the countershaft 30 from the first position (broken line) to the second position (solid line) of the countershaft 30 in FIG.

Therefore, the variable sub-shaft mechanism 35 can adjust the height of the sub-shaft 30 in the height direction 30B in parallel with the optical disk 10 by rotating the sub-shaft adjusting screw 32.

FIGS. 10A to 10C are conceptual diagrams of the tangential tilt adjustment according to the second embodiment. In FIGS. 10A to 10C, 1A is:
1B is a rising direction approaching the optical disc 10 in the height direction of the main shaft 20 and the sub shaft 30, 1B is a descending direction away from the optical disc 10 in the height direction of the main shaft 20 and the sub shaft 30, and L is the main shaft 20 and the sub shaft 30. It is a central axis that passes through the midpoint between the axes 30 and is parallel to the axial directions 20A and 30A.

As shown in FIGS. 10 (a) to 10 (c), the plane M0 formed by the main shaft 20 and the sub shaft 30 moves in the ascending direction 1A so that the main shaft 20 is parallel to the plane M0. , The sub-shaft 30 moves in the descending direction 1B in parallel with the plane M0.
By moving to, a new plane M1 inclined by θt in the tangential direction with respect to the plane M0 is obtained.

A plane M0 formed by the main shaft 20 and the sub shaft 30
Since M1 and M1 are movement locus surfaces when the optical pickup 1 moves in the disk radial direction, the main shaft 20 and the sub shaft 30 are moved in parallel to the plane M0 in directions opposite to each other in the height direction. Since the optical pickup 1 tilts in the tangential direction by θt, and the parallel relationship between the main axis 20 and the sub-axis 30 is maintained, the tilt θt does not change from the inner circumference to the outer circumference of the optical disc 10.

Therefore, the inclination of the optical pickup 1 in the tangential direction can be adjusted equally from the inner circumference to the outer circumference of the optical disk 10 by the main shaft variable mechanism 25 and the sub shaft variable mechanism 35.

Further, in the second embodiment, the variable main shaft mechanism 25 and the variable sub shaft mechanism 35 are constituted by the same link mechanism.
The variable main shaft 25 is suspended from the base chassis 3 on the upper surface, and the variable main shaft 35 is formed on the base chassis 3 on the lower surface. The counter shaft 30 is placed in the axial direction 20A.
Or when pushed to 30A, the main shaft 20 can move in the ascending direction 1A, and the sub shaft 30 can move in the descending direction 1B.
Further, since the main shaft 20 and the sub shaft 30 are pushed in the axial direction 20A or the axial direction 30A by the same amount due to the same link mechanism, as shown in FIG. The movement amount hm in the direction 1A and the movement amount hs of the sub shaft 30 in the descending direction 1B are hm = hs, and the center axis L
Is used as the rotation axis S, the inclination of the optical pickup 1 in the tangential direction can be adjusted.

Further, as shown in FIG.
0, the moving amount hm in the ascending direction 1A and the descending direction 1 of the counter shaft 30
When the movement amount hs of B satisfies hm <hs, the rotation axis S is formed between the center axis L and the main shaft 20. Conversely, FIG.
As shown in (c), the movement amount hm of the main shaft 20 in the ascending direction 1A and the movement amount hs of the sub shaft 30 in the descending direction 1B are hm> h.
If s, the rotation axis S is formed between the center axis L and the sub-axis 30.

Therefore, by rotating both the main shaft 20 and the sub-shaft 30 in the opposite directions, the rotation axis for tilting the optical pickup 1 in the tangential direction is formed in accordance with the position of the objective lens of the optical pickup. It is possible. In other words, by adjusting the axes of both the main shaft 20 and the sub-shaft 30 in directions opposite to each other, it is possible to perform the adjustment for suppressing the height fluctuation of the objective lens of the optical pickup.

In the second embodiment, the means for adjusting the height of the main shaft 20 and the counter shaft 30 in directions opposite to each other has been described. However, the present invention is not limited to this, and only the main shaft 20 is adjusted. Means for adjusting only the counter shaft 30 or adjusting the main shaft 20 and the counter shaft 30 in the same direction may be used.

In the first and second embodiments,
The sub shaft supporting portions 31a and 31b of the sub shaft variable mechanism 35
1 is also included. That is, FIG. 11 is a diagram illustrating one embodiment of the variable sub-shaft mechanism 35. In FIG. 11, two sub shaft support portions 31a and 31 supporting both ends of the sub shaft 30 are provided.
b is an elastic member, one end of which is fixed to both ends of the sub shaft 30 at support points a4 and b4 respectively, and the other end of which is perpendicular to the axial direction 30A and parallel to the optical disk 10 at the other end. Via the rotating shafts a3 and b3
0 is rotatably supported with respect to the base chassis 3.

In FIG. 11, the sub shaft support portions 31a and 31b are formed of plate-shaped resin springs, and are rotated from the sub shaft 30 by the rotation shafts a3 and b.
The height up to 3 is the same. Also, the counter shaft support 31
By supporting the rotating shafts a3 and b3 at the joints of the base chassis 3 with the rotating shafts a and 31b by pins, respectively,
The reference numerals 1a and 31b are supported by the base chassis 3 so as to be rotatable around rotation axes a3 and b3.

The sub shaft adjusting screw 32 is used to move the sub shaft 30 in the axial direction 3.
It is adjusted so that it can move to 0A and pushes one end of the counter shaft 30 in the axial direction 30A. Also, the countershaft 30
Is urged in the axial direction 30A by a sub-shaft urging spring 33 that urges one end in the axial direction 30A.

The rotation of the sub shaft adjusting screw 32 causes the sub shaft 30 to rotate.
Is moved in the axial direction 30A, the auxiliary shaft supporting portion 3 is connected via the rotating shafts a3 and b3 at the connecting portion with the base chassis 3.
1a and 31b are provided with Ma,
Since each of the sub shafts 30 is elastically deformed in the Mb direction,
While moving to 0A, it can also move in the height direction 30B. In other words, the sub shaft adjusting screw 32 can adjust the movement of the sub shaft 30 from the first position (broken line portion) to the second position (solid line portion) of the sub shaft 30 in FIG.

Therefore, the variable sub-shaft mechanism 35 can adjust the height of the sub-shaft 30 in the height direction 30 B in parallel with the optical disk 10 by rotating the sub-shaft adjusting screw 32. Note that the variable spindle mechanism 25 may be configured similarly to the above configuration.

(Embodiment 3) FIG. 12 is a partially transparent perspective view showing a configuration of an optical pickup adjusting mechanism according to Embodiment 3 of the present invention. 12, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and in the third embodiment, a sub shaft variable mechanism 35 for adjusting the height of the sub shaft 30 is used.
2 (see FIG. 13).
One end of each of the two sub shaft support portions 31a and 31b is axially 3
The auxiliary shaft 3 is connected via the rotation shafts a5 and b5 in a direction parallel to 0A.
0 is rotatably supported with respect to the base chassis 3 from the first embodiment. In other words, the counter shaft 30 is moved in the axial direction 30 via the counter shaft support portions 31a and 31b.
This embodiment is different from the first embodiment in that it is movable in a direction 30C orthogonal to A and parallel to the optical disk 10.

Next, the countershaft 30 according to the third embodiment will be described.
The operation of the variable sub shaft mechanism 35 will be described with reference to FIG. FIG. 13 is a diagram showing the variable countershaft mechanism 35.
(A) is a perspective view, (b) is a side view. 13, 30A is the axial direction of the sub-shaft 30, 30B is the height direction of the sub-shaft 30, which is the normal direction of the base chassis 3, and 30C is parallel to the optical disk 10 and orthogonal to the axial direction 30A of the sub-shaft 30. In the width direction of the sub shaft 30.

The variable sub shaft mechanism 35 adjusts the inclination of the optical axis of the optical pickup 1 and the recording surface of the optical disk in the tangential direction (tangential direction) of the disk. Counter shaft variable mechanism 3
Reference numeral 5 includes a countershaft 30, countershaft support portions 31a and 31b, and a countershaft adjusting screw 32, and is attached to the base chassis 3.

The two sub shaft support portions 31a and 31b supporting both ends of the sub shaft 30 are formed of elastic members. One end of each of the two sub shaft support portions 31a and 31b is connected to the base chassis 3 by rotating shafts a5 and b5 in a direction parallel to the axial direction 30A. The sub shaft 30 is rotatably supported by the base chassis 3 via the shaft, and the other end is fixed to the sub shaft 30 at support points a6 and b6, respectively. In the third embodiment, the sub shaft support portions 31a and 31b are formed of plate-like resin springs, and the height from the center of the sub shaft 30 to the rotation shafts a5 and b5 and the rotation shafts a5 and b5 are adjusted. They are the same. The sub-shaft 30 is rotatably supported on the base chassis 3 around the rotation axes a5 and b5 by making the vicinity of the rotation axes a5 and b5 U-shaped.

The sub shaft adjusting screw 32 is used to move the sub shaft 30 in the width direction 3.
It is mounted so as to be movable to 0C and to push the center in the longitudinal direction of the counter shaft 30 in the width direction 30C. Also,
When one end of the sub-shaft 30 is pushed in the width direction 30C by the sub-shaft adjusting screw 32, the biasing force P is applied to the sub-shaft 30 in the direction of the sub-shaft adjusting screw 32 due to the reaction force of the elastic deformation of the sub-shaft supporting portions 31a and 31b. Is generated, and the counter shaft 30 can be urged in the width direction 30C.

The rotation of the sub shaft adjusting screw 32 causes the sub shaft 30 to rotate.
Is moved in the width direction 30C, the sub shaft support portions 31a, 31
With the rotation shafts a5 and b5 of b as axes, the sub shaft 30
Rotate in the direction of Mb and move in the width direction 30C,
It can also move in the height direction 30B. In other words, the sub shaft adjusting screw 32 is connected to the sub shaft 3 in FIG.
It is possible to adjust the movement of the counter shaft from the first position (broken line portion) to the second position (solid line portion).

Therefore, the variable sub-shaft mechanism 35 can adjust the height of the sub-shaft 30 in the height direction 30B in parallel with the optical disk 10 by rotating the sub-shaft adjusting screw 32.

As shown in FIG. 14, the sub-shaft adjusting screws 32 are attached to both ends of the sub-shaft 30, respectively.
You may attach so that it may push. By providing the counter shaft adjusting screws 32 at both ends of the counter shaft 30, the counter shaft support portions 31a, 3
It is possible to eliminate the adjustment error in the radial direction due to the lack of accuracy of 1b, and to adjust the tangential tilt with high accuracy.

Further, the variable countershaft mechanism 35 of the third embodiment
Includes the configurations shown in FIGS. 15 to 18. FIG.
FIG. 5 is a view showing another form of the variable sub-shaft mechanism 35 according to the third embodiment.

One end of each of two sub shaft support portions 31a and 31b supporting both ends of the sub shaft 30 is supported by the base chassis 3 via rotation shafts a5 and b5 in a direction parallel to the axial direction 30A. The other end rotatably supports the sub shaft 30 with respect to the base chassis 3 via rotation shafts a6 and b6 parallel to the axial direction 30A. In the third embodiment, the rotating shafts a5 and b5 in the joint portion between the sub shaft support portions 31a and 31b and the base chassis 3 are supported by pins, respectively.
The sub shaft 30 is rotatably supported with respect to the base chassis 3 by supporting the rotation shafts a 6 and b 6 at the joint portions at both ends of the sub shaft 30 with the pins 1 a and 31 b, respectively. In other words, the sub shaft 30, the sub shaft support portions 31a and 31b, and the base chassis 3 constitute a link mechanism.

The counter shaft adjusting screw 32 is used to move the counter shaft 30 in the width direction 3.
It is mounted so as to be movable to 0C and to push the center in the longitudinal direction of the counter shaft 30 in the width direction 30C. Also,
The sub shaft 30 is urged in the width direction 30C by a sub shaft urging spring 33 that urges one end in the width direction 30C.

The rotation of the sub shaft adjusting screw 32 causes the sub shaft 30 to rotate.
Is moved in the width direction 30C, the sub shaft supports 31a and 31b and the base chassis 3 link the sub shafts 31a and 31b to the base chassis 3 by the action of a link mechanism composed of the sub shaft 30 and the sub shaft supports 31a and 31b. Rotation axes a5 and b5 at the joint
Is rotated in the directions of Ma and Mb around the axis, and the sub shaft 30 can move in the width direction 30C and also in the height direction 30B. In other words, the counter shaft adjustment screw 32
Can adjust the movement of the sub shaft 30 from the first position (broken line) to the second position (solid line) of the sub shaft 30 in FIG. 15 (b).

Accordingly, the variable sub-shaft mechanism 35 can adjust the height of the sub-shaft 30 in the height direction 30B in parallel with the optical disk 10 by rotating the sub-shaft adjusting screw 32.

FIGS. 16A and 16B are views showing another embodiment of the variable sub-shaft mechanism 35 according to the third embodiment, wherein FIG. 16A is a perspective view, FIG. 16B is a top view, and FIG. 16C is a side view. . In FIG. 16, two sub shaft support portions 3 supporting both ends of the sub shaft 30 are provided.
Reference numerals 1a and 31b are the same as the support configuration in FIG. 13, and support the sub shaft 30 so as to be rotatable with respect to the base chassis 3 as rotation shafts a5 and b5 parallel to the axial direction 30A.
The countershaft moving means 37 adjusts the countershaft 30 so as to be movable in the width direction 30C, and includes a countershaft adjusting screw 32 and a tapered surface member 36 which comes into contact with the transmission member 34 at an angle θ.

When the transmission member 34 moves in the axial direction 30A due to the rotation of the auxiliary shaft adjusting screw 32, the transmission member 34 and the tapered surface member 36 come into contact with each other at an angle θ with respect to the axial direction 30A. Can push the tapered surface member 36 in the axial direction 30A and also push the tapered surface member 36 in the width direction 30C. Since the sub shaft 30 rotates about the rotation shafts a5 and b5, the sub shaft 30 is moved in the width direction 30 by the contact between the transmission member 34 and the tapered surface member 36.
While moving to C, it can also move to height direction 30B. In other words, the sub-shaft adjusting screw 32 moves the transmission member 34 in the axial direction 30A, thereby
In (b) and (c), the movement of the sub shaft 30 from the first position (broken line portion) to the second position (solid line portion) of the sub shaft 30 can be adjusted.

Therefore, the variable sub-shaft mechanism 35 can adjust the height of the sub-shaft 30 in the height direction 30B in parallel with the optical disk 10 by rotating the sub-shaft adjusting screw 32.

As shown in FIG. 17, contact portions between the transmission member 34 and the tapered surface member 36 of the sub shaft moving means 37 may be provided at both ends of the sub shaft. Transmission member 34
By providing the contact portions of the taper surface member 36 and the opposite ends of the counter shaft 30, the adjustment error in the radial direction due to insufficient accuracy of the counter shaft support members 31a and 31b is eliminated, and the tangential tilt can be adjusted with high accuracy. Can be.

FIGS. 18A and 18B are views showing another embodiment of the variable sub-shaft mechanism 35 according to the third embodiment. FIG.
(B) is a side view. One end of each of two sub shaft support portions 31a and 31b supporting both ends of the sub shaft 30 is fixed to the sub shaft 30, and the other end is connected to the base chassis 3 in the axial direction 30A.
The sub shaft 30 is rotatably supported on the base chassis 3 via rotation shafts a5 and b5 which are parallel to the main shaft 30 and are separated from the center axis c of the sub shaft 30 by a distance d. In the third embodiment, the rotating shafts a5 and b5 in the joint portion between the sub-shaft support portions 31a and 31b and the base chassis 3 are constituted by axes having the same central axis. To be rotatably supported.

The counter shaft adjusting member 38 includes the counter shaft supporting member 31.
By rotating a and 31b around the rotation axes a1 and b1, the sub shaft 30 can be rotated.

The rotation of the sub shaft adjusting member 38 causes the sub shaft 30 to rotate.
The center axis c is eccentric with the rotation axes a5 and b5 with the distance d, so that the sub-shaft 30 rotates in a circular orbit around the rotation axes a5 and b5 and moves in the width direction 30C. At the same time, it can move in the height direction 30B. In other words, the sub shaft adjusting member 38 can adjust the movement of the sub shaft 30 from the first position (broken line portion) to the second position (solid line portion) of the sub shaft 30 in FIG. 18B.

Therefore, the variable sub-shaft mechanism 35 can adjust the height of the sub-shaft 30 in the height direction 30B in parallel with the optical disk 10 by rotating the sub-shaft adjusting member 38.

The counter shaft adjusting member 38 may be detachable as a separate member. In FIG. 18, the rotation shafts a5 and b5 of the sub shaft 30 and the sub shaft support portions 31a and 31b are provided.
May be integrally configured. In other words, the countershaft 30
May be eccentric shafts having different center axes at both ends and the center.

In the third embodiment, the auxiliary shaft support portions 31a and 31b and the base chassis 3 or the auxiliary shaft support portions 31a and 31b and the auxiliary shaft 30 are integrally formed by, for example, a resin material. Is also good.

In the third embodiment, the sub shaft 30
The sub-shaft support portions 31a and 31b and the base chassis 3 may be integrally formed of, for example, a resin material.

In the first to third embodiments, the mechanism for tilting the objective lens has been described as a mechanism for adjusting the tilt in the radial direction. However, the present invention is not limited to this. A means such as a radial tilt correction mechanism using a liquid crystal element or a mechanism for tilting the base chassis in the radial direction may be used.

[0103]

As described above, according to the first aspect of the present invention, a guide rail supporting mechanism for supporting the optical pickup and guiding the disk in the radial direction is perpendicular to the guide rail. And a support member rotatably supporting both ends of the guide rail with respect to the base with a direction parallel to the surface of the disk as a rotation axis, and moving the guide rail in the radial direction with respect to the base. Moving means for moving the guide rail in the radial direction and moving the guide rail up and down in a direction perpendicular to the surface of the disk. Therefore, the tangential tilt of the optical pickup can be adjusted by moving the guide rail up and down in parallel.

According to the second aspect of the present invention,
As a guide rail support mechanism that supports the optical pickup and guides the movement of the disc in the radial direction, both ends of the guide rail are parallel to the guide rail, and the direction parallel to the surface of the disc is a rotation axis. A support member rotatably supporting the base; and a moving means for moving the guide rail in a direction perpendicular to the guide rail with respect to the base, and moving the guide rail in a direction perpendicular to the guide rail. At the same time, the guide rail is moved up and down in a direction perpendicular to the surface of the disk. Therefore, the tangential tilt of the optical pickup can be adjusted by moving the guide rail up and down in parallel.

According to the third aspect of the present invention,
According to the first or second aspect of the present invention, the guide rail is provided by providing the rotating shaft at a first joint between the both ends of the guide rail and the support member and a second joint between the base and the support member. The guide rail is moved in a direction parallel to the disk surface and perpendicular to the rotation axis, and the guide rail is moved up and down in a direction perpendicular to the disk surface and parallel to the disk surface. Therefore, the tangential tilt of the optical pickup can be adjusted by moving the guide rail up and down in parallel.

Further, according to the invention of claim 4 of the present invention,
The invention according to claim 1 or 2, wherein the rotating shaft is provided at a connecting portion between the both ends of the guide rail and the supporting member or a connecting portion between the base and the supporting member, and the supporting member is provided with a base via an elastic member. Alternatively, by fixing to the guide rail, the guide rail is moved in a direction parallel to the disk surface and perpendicular to the rotation axis, and the guide rail is moved in a direction perpendicular to the disk surface in a direction perpendicular to the disk surface. Lift up and down in parallel. Therefore, the tangential tilt of the optical pickup can be adjusted by moving the guide rail up and down in parallel.

According to the fifth aspect of the present invention,
According to the fourth aspect of the present invention, the number of components can be reduced by configuring the support member with an elastic member.

According to the sixth aspect of the present invention,
The optical pickup according to any one of claims 1 to 5, wherein the optical pickup is supported by at least one pair of guide rails.
Providing support members and moving means on both of the two guide rails, and adjusting one of the guide rails in a direction away from the surface of the disk, and simultaneously adjusting the other guide rail in a direction to approach the surface of the disk. Accordingly, height fluctuation due to adjustment of the objective lens of the optical pickup can be suppressed.

According to the seventh aspect of the present invention,
In any one of the first and sixth aspects of the present invention, a spring for urging the guide rail in the radial direction is provided, and the position of the adjusted guide rail can be held by applying an urging force to the moving means. .

Further, according to the invention of claim 8 of the present invention,
The invention according to any one of claims 1 and 7, wherein the moving means acts on the center portion of the guide rail in the longitudinal direction to move the guide rail, thereby uniformly applying a force to the support members at both ends of the guide rail. Can be.

According to the ninth aspect of the present invention,
In the invention according to any one of claims 1 and 7, the moving means acts on at least one of both ends of the guide rail to move the guide rail, so that the moving means can be moved without obstructing the movement of the optical pickup. Can be configured.

According to the tenth aspect of the present invention, in any one of the first and ninth aspects, the moving means is disposed on the outer periphery of the projection area of the disk, so that the moving means in the height direction by the disk is provided. There is no restriction, and the configuration of the moving means can be simplified.

According to the eleventh aspect of the present invention, in any one of the first and fifth aspects, the support member and the base or the support member and the guide rail are integrally formed. Thus, the number of parts can be reduced.

According to the twelfth aspect of the present invention, in any one of the first and fifth aspects, the guide rail, the support member, and the base are integrally formed to reduce the number of parts. can do.

Therefore, by adjusting the tangential tilt of the optical pickup by moving the guide rail up and down in parallel by the optical pickup adjusting mechanism according to the present invention,
After the tilt adjustment, the residual tangential tilt at the inner or outer peripheral position of the disc can be suppressed.

[Brief description of the drawings]

FIG. 1 is a partially transparent perspective view showing a configuration of an optical pickup adjustment mechanism according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a configuration of the objective lens driving device of FIG. 1;

FIG. 3 is a schematic diagram of a main part of the objective lens driving device of FIG. 1;

FIG. 4 is a diagram showing the configuration and operation of the variable countershaft mechanism of FIG. 1;

FIG. 5 is a conceptual diagram of tangential tilt adjustment by the variable countershaft mechanism of FIG. 1;

FIG. 6 is a view showing the configuration and operation of another embodiment of the variable countershaft mechanism of FIG. 1;

FIG. 7 is a partially transparent perspective view showing a configuration of an optical pickup adjustment mechanism according to a second embodiment of the present invention.

8 is a diagram showing the configuration and operation of the variable spindle mechanism of FIG. 7;

FIG. 9 is a diagram showing the configuration and operation of the variable countershaft mechanism of FIG. 7;

FIG. 10 is a conceptual diagram of tangential tilt adjustment by the variable main shaft mechanism and the variable counter shaft mechanism of FIG. 7;

11 is a diagram showing the configuration and operation of another mode of the variable countershaft mechanism of FIG. 7;

FIG. 12 is a partially transparent perspective view showing a configuration of an optical pickup adjustment mechanism according to a third embodiment of the present invention.

13 is a diagram showing the configuration and operation of the variable countershaft mechanism of FIG.

FIG. 14 is a diagram showing the configuration of another embodiment of the variable countershaft mechanism of FIG. 12;

FIG. 15 is a diagram showing the configuration and operation of another mode of the variable countershaft mechanism of FIG. 12;

FIG. 16 is a view showing the configuration and operation of another mode of the variable countershaft mechanism of FIG. 12;

17 is a diagram showing a configuration of another embodiment of the variable countershaft mechanism of FIG.

FIG. 18 is a diagram showing the configuration and operation of another mode of the variable countershaft mechanism of FIG. 12;

[Explanation of symbols]

 Reference Signs List 1 optical pickup 2 disk motor 3 base chassis 10 optical disk 20 main shaft 21a, 21b main shaft support portion 22 main shaft adjustment screw 23 main shaft biasing spring 25 main shaft variable mechanism 30 sub shaft 31a, 31b sub shaft support portion 32 sub shaft adjustment screw 33 sub shaft Urging spring 35 sub shaft variable mechanism 37 sub shaft moving means 38 sub shaft adjusting member 40 objective lens driving device

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yoshihiro Igawa 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Terms (reference) 5D068 AA02 BB01 CC01 EE16 GG05 5D117 AA02 JJ13 KK08 5D118 AA13 BA01 CD02 CD03 CD04

Claims (12)

[Claims] 1. An optical pickup for recording or reproducing a signal on or from a disk, a disk motor for rotating the disk, a base for supporting the disk motor, and a support for supporting the optical pickup and moving the disk in a radial direction. An optical pickup adjustment mechanism for adjusting an angle of the optical pickup with respect to a disk surface, wherein the rotation axis is a direction perpendicular to the guide rail and parallel to the surface of the disk. A supporting member that rotatably supports both ends of the guide rail with respect to the base; and a moving unit that moves the guide rail in the radial direction with respect to the base. By moving the guide rail in the radial direction, both ends of the guide rail are It is rotated around the shaft,
An optical pickup adjusting mechanism, wherein the guide rail is displaced in a direction perpendicular to a surface of the disk. 2. An optical pickup for recording or reproducing a signal on or from a disk, a disk motor for rotating the disk, a base for supporting the disk motor, and supporting the optical pickup for moving the disk in a radial direction. An optical pickup adjustment mechanism for adjusting an angle of the optical pickup with respect to a disk surface, wherein the rotation axis is a direction parallel to the guide rail and parallel to the surface of the disk. A supporting member that rotatably supports both ends of the guide rail with respect to the base, and a moving unit that moves the guide rail with respect to the base in a direction orthogonal to the guide rail, Moving the guide rail in a direction orthogonal to the guide rail by moving means; Ri, wherein both end portions of the guide rail is rotated about the pivot axis, the optical pickup adjusting mechanism, characterized in that to displace in a direction perpendicular to the guide rail with respect to the plane of the disc. 3. The rotating shaft is provided at each of a first connecting portion between the both ends of the guide rail and the supporting member and a second connecting portion between the base and the supporting member. The optical pickup adjusting mechanism according to claim 1. 4. A rotating shaft is provided at a connecting portion between both ends of a guide rail and a supporting member or a connecting portion between a base and the supporting member, and the supporting member is connected to the base or the guide via an elastic member. 3. The optical pickup adjustment mechanism according to claim 1, wherein the optical pickup adjustment mechanism is fixed to a rail. 5. The optical pickup adjustment mechanism according to claim 4, wherein the support member is an elastic member. 6. The optical pickup is supported by at least one pair of guide rails, and has a support member and a moving means on both of the two guide rails, and when one of the guide rails is adjusted in a direction away from the surface of the disk. 6. The device according to claim 1, wherein the other guide rail is adjusted in a direction to approach the surface of the disk.
The optical pickup adjustment mechanism according to any one of the above. 7. The apparatus according to claim 1, further comprising a spring for urging the guide rail in a direction perpendicular to the rotation axis, and applying a urging force to the moving means. The optical pickup adjustment mechanism according to 1. 8. The optical pickup according to claim 1, wherein the moving means acts on a central portion of the guide rail in a longitudinal direction to move the guide rail. Adjustment mechanism. 9. The apparatus according to claim 1, wherein the moving means acts on at least one of both ends of the guide rail to move the guide rail. Optical pickup adjustment mechanism. 10. The optical pickup adjustment mechanism according to claim 1, wherein the moving unit is disposed outside a projection area of the disk. 11. The optical pickup adjustment mechanism according to claim 1, wherein the support member and the base, or the support member and the guide rail are integrally formed. 12. The optical pickup adjustment mechanism according to claim 1, wherein the guide rail, the support member, and the base are integrally formed.