JP2003067943A - Posture and position adjustment structure for optical pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a posture and position adjustment structure for an optical pickup which can adjust the posture and the position of a main body unit with respect to a housing. SOLUTION: A supporting recessed part 35 whose sectional form perpendicular to the tangential direction G of the inner surface is uniformly cylindrical in the tangential direction and which is immersed in a first focus direction F1 is provided to a main body unit 32. In the state that a fitting protrusion 64 is fitted into an engagement part 65 and that a first and a second adjustment screws 60 and 61 are locked at a first and a second locking parts 54 and 55 and are screwed into a first and a second screwing part 58 and 59, the posture of the main body unit with respect to the housing 29 is adjusted by screwing and unscrewing the first and the second adjustment screws to angularly displacing a supporting protrusion 31 fitted into the supporting recessed part around the center of the outer periphery surface thereof. The position of the main body unit with respect to the housing is adjusted by displacing the supporting protrusion in the tangential direction G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup provided in an optical disc device.

[0002]

2. Description of the Related Art FIG. 13 is a perspective view showing a conventional optical pickup 1 with a part thereof cut away. FIG. 14 is a plan view showing the optical pickup 1. FIG. 15 is a side view of the optical pickup 1 with a part cut away, as seen from the upstream side in the first tracking direction A1. FIG. 16 shows an optical pickup 1
It is the front view which notched a part of and saw from the 1st tangential direction C1 upstream side.

An optical pickup 1 provided in an optical disc device for outputting information recorded on a recording disc is a device for optically reading coded information recorded on the recording surface of the recording disc. The recording disc is, for example, a compact disc (abbreviation: CD), a digital versatile disc (abbreviation: DVD), a laser disc (abbreviation: LD), or the like.

The optical pickup 1 includes a housing 2 and a main body unit 3 having an objective lens 4 for focusing laser light from a light emitting element (not shown) on a recording surface of a recording disk.
A semiconductor laser element (not shown) and a light receiving element (not shown). Objective lens drive actuator 27 for driving the objective lens 4 of the main body unit 3
Is for the recording surface of the recording disk rotated by a spindle motor (not shown) that rotates the recording disk,
The attitude of the main body unit 3 is adjusted so that the light from the light emitting element is condensed by the objective lens 4 on the recording surface of the recording disk. The reflected light from the recording surface is received by the light receiving element and photoelectrically converted.

The optical pickup 1 is displaced in a tracking direction A, which is a direction substantially parallel to the radial direction of the recording disk, by an optical pickup driving means (not shown).
The tracking direction A includes a first tracking direction A1 that is substantially parallel to a direction outward in the radial direction of the recording disc, and a second tracking direction A1 that is substantially parallel to a direction radially inward of the recording disc.
And the tracking direction A2.

The objective lens 4 of the body unit 3 of the optical pickup 1 can be displaced in the focus direction B by an objective lens drive actuator 27. The focus direction B is a direction substantially perpendicular to the tracking direction A, and a first focus direction B1 that is a direction close to the recording surface of the recording disk and a second focus direction B2 that is a direction that is separated from the recording surface of the recording disk. Including and

The tangential direction C is a direction substantially parallel to the speed direction when the recording disk rotates about the rotation axis of the spindle motor, in other words, a direction substantially perpendicular to the tracking direction A and the rotation axis of the spindle motor. Is. The tangential direction C includes a first tangential direction C1 that is in the same direction as the speed direction of the recording disk, and a second tangential direction C2 that is opposite to the first tangential direction C1.

The housing 2 has a plate-like shape whose thickness direction is the focus direction B, and a space 2a having a substantially rectangular cross section perpendicular to the focus direction B is formed in the central portion. From the upstream side of the first tangential direction C1 of the housing 2 to the downstream side of the second tracking direction A2 of the side portion facing the space 2a,
The first locking portion 7 is formed. A through hole that penetrates in the focus direction B is formed in the first locking portion 7.

A through hole 2b penetrating the housing 2 in the focus direction B is formed near the space 2a downstream of the second tracking direction A2 and downstream of the first tangential direction C1 of the housing 2. A second locking portion 8 is provided on the downstream side of the through hole 2b in the second focus direction B2 so as to project radially inward of the through hole 2b over the entire circumference. As described above, the through hole 2b has a shape in which a cross section parallel to the axis of the through hole 2b has a substantially convex step.

A cylindrical fitting protrusion 20 is formed on the downstream side of the through hole 2b of the housing 2 in the first tangential direction C1 so as to project in the first focus direction B1. Downstream of the second tracking direction A2 of the housing 2, and second
In the vicinity of the space 2a on the downstream side of the tangential direction C2,
A hemispherical support protrusion 18 protruding in the first focus direction B1 is formed.

Second focus direction B2 of the main unit 3
A substantially flat plate-shaped base portion 9 serving as a bottom plate of the main body unit 3 is provided on the downstream side. With the main body unit 3 fitted in the space 2a, the first tangential direction C1 upstream side and the first tracking direction A1 downstream side of the base portion 9 project in the first focus direction B1 and protrude in the second tangential direction C2. A first connecting portion 10 that extends and corresponds to the first locking portion 7 of the housing 2 is formed. In the first connecting portion 10,
A first screwing portion 12 is provided that penetrates in the focus direction B and has an internal thread engraved therein.

Further, on the downstream side of the first tangential direction C1 and on the downstream side of the second tracking direction A2 of the base portion 9,
A second connecting portion 11 that protrudes in the first focus direction B1 and extends in the second tracking direction A2 and that corresponds to the second locking portion 8 of the housing 2 is formed. The second connecting portion 11 is provided with a second screwing portion 13 penetrating in the focus direction B and having an internal thread engraved therein. Further, an end portion of the second connecting portion 11 on the downstream side of the first tangential direction C1 penetrates in a substantially rectangular shape in the focus direction B, and has a first tangential direction C1.
A fitting portion 19 that opens to the inside is provided.

Further, on the downstream side of the second tangential direction C2 and the downstream side of the second tracking direction A2 of the base portion 9, the protrusion in the first focus direction B1 extends in the second tangential direction C2, and the supporting protrusion 18 of the housing 2 is formed. A corresponding third connecting portion 16 is formed. Third connecting portion 16
Is provided with a support recess 17 that is hemispherically recessed in the first focus direction B1.

The body unit 3 is connected via a first adjusting screw 5 and a second adjusting screw 6 so that the attitude with respect to the housing 2 can be adjusted. The first and second adjusting screws 5 and 6 are generally cylindrical. One end of each of the first and second adjusting screws 5 and 6 is formed to have a larger outer diameter than the remaining portion, and has a groove into which a tool such as a screwdriver can be fitted. The outer diameter of the remaining portion is smaller than the inner diameter of the through hole formed in the first and second locking portions 7 and 8, and the first and second screwing portions 12 and 13 are formed. An external screw that can be screwed on is engraved.

With the main body unit 3 fitted in the space 2a, the first locking portion 7 of the housing 2 and the first connecting portion 10 of the main body unit 3 face each other, and the second locking portion 8 of the housing 2 is While facing the second connecting portion 11 of the main body unit 3, the fitting projection 20 of the housing 2 fits into the fitting portion 19, and the support projection 18 of the housing 2 supports the third connecting portion 16 of the main body unit 3. Fit into the recess 17.

At this time, the first spring member 14 is clamped by the first locking portion 7 of the housing 2 and the first connecting portion 10 of the main body unit 3. In addition, the second spring member 15 serves to connect the second locking portion 8 of the housing 2 and the second connecting portion 1 of the main body unit 3.
It is clamped by 1. First and second spring members 1
Reference numerals 4 and 15 are spiral compression springs.

In this state, the first adjusting screw 5 is inserted into the through hole of the first locking portion 7 and the first spring member 14 and screwed to the first screwing portion 12. Similarly, the second adjusting screw 6 is inserted into the through hole of the second locking portion 8 and the second spring member 15 and screwed to the second screwing portion 13. At this time, the first spring member 14 and the second spring member 15 are connected to the housing 2 and the main unit 3.
A spring force is applied in a direction in which and are separated from each other. In this way, the first adjusting screw 5 is locked to the first locking portion 7 while being gently inserted into the through hole of the first locking portion 7, and
The second adjustment screw 6 is gently inserted into the through hole of the second locking portion 8.

As described above, the main body unit 3 is connected via the first adjusting screw 5 and the second adjusting screw 6 so that the attitude with respect to the housing 2 can be adjusted. More specifically, by screwing the first adjustment screw 5 in and out, the main body unit 3 is angularly displaced about a straight line connecting the second screw attachment portion 13 and the support protrusion 18 in general. In addition, by screwing the second adjusting screw 6 forward and backward, the main body unit 3 is angularly displaced about a straight line connecting the first screw attachment portion 12 and the support protrusion 18. Therefore, by angularly displacing the main body unit 3 around the center of the outer peripheral surface of the support protrusion 18, the attitude of the main body unit 3 with respect to the housing 2 can be adjusted. The fixing member 21 can hold the state in which the support protrusion 18 is fitted into the support recess 17 and is pressed into contact therewith. The adjustment of the posture of the main body unit 3 with respect to the housing 2 described above can be performed with the fixing member 21 attached, and may be performed after the fixing member 21 is attached or after the posture is adjusted.

FIG. 17 shows another conventional optical pickup 22.
FIG. The optical pickup 22 is similar to the optical pickup 1 described above, but after adjusting the attitude of the main body unit 24 with respect to the housing 23 by special equipment in the process of assembling the optical pickup 22 without using members such as screws. The main unit 24 is adhered and fixed to the housing 23 by using the adhesive 26.

[0020]

In the conventional optical pickup 1 shown in FIGS. 13 to 16, when the position of the main body unit 3 with respect to the housing 2 is adjusted, the support projection 18 fits into the support recess 17 and the support projection 18 is formed. Since it is angularly displaced about the center of the outer peripheral surface, the position of the main body unit 3 with respect to the housing 2 cannot be adjusted along the tracking direction A and the tangential direction C.

In order for the optical pickup 1 to accurately read the recorded information on the recording disk, the objective lens 4 of the main unit 3 is used.
However, the light from the light emitting element must be correctly focused on the recording surface of the recording disk. Therefore, the attitude and the position of the objective lens 4 must be properly adjusted by adjusting the attitude and the position of the main body unit 3. The optical pickup 1 can adjust the posture of the main body unit 3, but cannot adjust the position. Therefore, the accuracy of the position of the main body unit 3 depends on the dimensional accuracy of each component such as the housing 2 and the main body unit 3.

In the conventional optical pickup 22 shown in FIG. 17, in the process of assembling the optical pickup 22, the body unit 24 is bonded and fixed after the posture and position of the body unit 24 are adjusted by special equipment. Therefore, after the optical pickup 22 is assembled, the attitude and position of the main body unit 24 with respect to the optical disk device including the optical pickup 22 cannot be adjusted. Further, the posture and position of the main body unit 24 may be displaced due to temperature, impact, etc., which is a problem in terms of reliability.

Therefore, it is an object of the present invention to provide an attitude and position adjusting structure of an optical pickup capable of adjusting the attitude and position of a main body unit with respect to a housing.

[0024]

SUMMARY OF THE INVENTION The present invention comprises a housing,
In an optical pickup including a main body unit that is held in a housing so as to be angularly displaceable and has a lens member that collects light from a light emitting element on a recording surface of a recording disk, and an adjusting unit that adjusts a posture of the main body unit with respect to the housing. A support projection having a spherical outer surface and a support recess fitted into the housing such that the support projection is angularly displaceable around the center of its outer peripheral surface and is displaceable in one direction perpendicular to the optical axis of light from the light emitting element. Any one of the above is formed, and the other one of the support protrusion and the support recess is formed in the main body unit.

According to the present invention, the housing is formed with one of the support protrusion and the support recess, and the main unit is formed with the other of the support protrusion and the support recess. The support projection has a spherical outer surface, and is fitted into the support recess so as to be angularly displaceable around the center of the outer peripheral surface thereof and displaceable in one direction perpendicular to the optical axis of the light from the light emitting element. By this, the attitude of the main body unit with respect to the housing can be adjusted by angularly displacing the support projection with respect to the center of the outer peripheral surface of the support projection. The position of the main unit can be adjusted.

Further, the present invention is characterized in that the inner surface of the support recess is a cylindrical shape having a cross-sectional shape perpendicular to the one direction that is uniform in the one direction.

According to the present invention, since the inner surface of the support recess has a cylindrical shape whose cross-section perpendicular to the one direction is uniform in the one direction, the support protrusion is fitted in the support recess. , Displacement in the direction perpendicular to the one direction and perpendicular to the optical axis is prevented. As a result, the support protrusion is angularly displaced around the center of the outer peripheral surface of the support protrusion and is displaced in the one direction without being displaced in the direction perpendicular to the one direction and the direction perpendicular to the optical axis. The posture adjustment and position adjustment can be realized.

Further, the present invention is characterized in that the inner surface of the support recess has a V-shaped cross section perpendicular to the one direction.

According to the present invention, the inner surface of the support recess has a V-shape in which the sectional shape perpendicular to the one direction is uniform in the one direction. Therefore, the support protrusion has two points with the inner surface of the support recess. The displacement in the direction perpendicular to the one direction and the direction perpendicular to the optical axis is prevented in the state of being in contact and fitted. As a result, the support protrusion is angularly displaced around the center of the outer peripheral surface of the support protrusion and is displaced in the one direction without being displaced in the direction perpendicular to the one direction and the direction perpendicular to the optical axis. The posture adjustment and position adjustment can be easily realized.

According to the present invention, the adjusting means has an adjusting screw on which an external screw is engraved, and a spring member for applying a spring force in a direction separating from the housing and the main body unit in the vicinity of the adjusting screw. The housing is provided with one of a locking portion for locking the adjustment screw in a state where it is gently inserted into the through hole and a screwing portion for screwing the adjustment screw to adjust its position. Is characterized in that either the locking portion or the threaded portion is formed.

According to the invention, the housing is formed with one of the locking portion and the screwing portion, and the main body unit is formed with the other of the locking portion and the screwing portion. The adjustment screw is locked by the locking portion while being gently inserted into the through hole, and the adjustment screw is screwed by the screwing portion so that the position can be adjusted. As a result, while the support protrusion is fitted in the support recess, the adjustment screw can be advanced and retracted with respect to the screw attachment portion to adjust the posture of the main body unit with respect to the housing, and The position of the main body unit with respect to the housing can be adjusted by preventing the displacement in the direction perpendicular to the one direction and the direction perpendicular to the optical axis.

According to the present invention, the housing is provided with one of a fitting protrusion and a fitting portion into which the fitting protrusion fits movably along the optical axis and in the one direction.
The other of the fitting protrusion and the fitting portion is formed on the main body unit.

According to the present invention, one of the fitting protrusion and the fitting portion is formed on the housing, and the other of the fitting protrusion and the fitting portion is formed on the main body unit. By fitting the fitting protrusion into the fitting portion, the displacement in the direction perpendicular to the one direction and the direction perpendicular to the optical axis can also be prevented by the fitting protrusion and the fitting portion. As a result, the position of the main body unit with respect to the housing can be displaced in only one direction in two places, that is, the portion where the above-mentioned support protrusion fits into the support recess and the portion where the fitting protrusion fits into the fitting portion. The attitude and position of the body unit relative to the housing can be adjusted to be acceptable.

[0034]

1 is a perspective view showing a part of an optical pickup 28 according to a first embodiment of the present invention, which is cut away. FIG. 2 is a plan view showing the optical disk device 44. FIG. 3 is a front view showing the optical disk device 44.

The optical disc device 44 is a device for reproducing information recorded on the recording surface of the disc-shaped recording disc 45 and / or recording information on the recording disc 45. On the recording surface where the information is recorded,
There is a groove called a pit, and the optical disc device 44
The presence or absence of pits on the recording surface is detected, and the information represented by this is output. The recording disc 45 is, for example, a digital versatile disc (abbreviation: DVD), a compact disc (abbreviation: CD), a laser disc (abbreviation: LD), or the like.

The optical disk device 44 comprises a rotating means 46 and an optical pickup 28. The rotating means 46 for rotating the recording disk 45 is the recording disk 4
A turntable 48 for fixing 5 and a spindle motor 49 for rotating the recording disk 45 supported by the turntable 48 are included. The turntable 48 is a disk that is coaxial with the rotation axis L1 of the rotation shaft 53 of the spindle motor 49 and is connected to the rotation shaft 53. The turntable 48 passes through the center of the recording disk 45 and is perpendicular to the recording surface and the rotation axis L45. The recording disk 45 is detachably supported with the axis L1 being coaxial.

The optical pickup 28 includes a recording disk 45.
Is a device for performing at least one of optical reading of coded information recorded on the recording surface and optical writing of information to the recording disk 45. The optical pickup 28 includes a housing 29, a main body unit 32 having an objective lens 52 that collects laser light from a light emitting element (not shown) on the recording surface of the recording disk 45, a reflection mirror 51, and an optical system 50. It is configured to include. The optical system 50 is configured to include a semiconductor laser element that is a light emitting element and a light receiving element (both not shown). The light from the light emitting element is reflected by the reflection mirror 51, and the objective lens 52
The light is focused so that its optical axis L2 is substantially perpendicular to the recording surface, and is focused so that it is focused on the recording surface. The optical axis L2 between the objective lens 52 and the recording surface of the recording disk 45 is parallel to the rotation axis L1 and the disk axis L45.

The objective lens drive actuator 30 for driving the objective lens 52 is rotated by the spindle motor 49 so that the light from the light emitting element is focused on the recording surface of the recording disc 45 by the objective lens 52. The posture and the position of the main body unit 32 are adjusted with respect to the recording surface of. The reflected light from the recording surface is the objective lens 5
After passing through 2 and the reflection mirror 51, the light is received by the light receiving element and photoelectrically converted.

The optical pickup 28 is the optical pickup 2
The optical pickup driving means for displacing 8 displaces the recording disk 45 in the tracking direction E along one diameter line of the recording disk 45 on one side. The tracking direction E is a first tracking direction E that is substantially parallel to the direction outward in the radial direction of the recording disk 45.
1 and a second tracking direction E2 that is substantially parallel to the direction radially inward of the recording disk 45 and is opposite to the first tracking direction E1.

The objective lens 52 of the main unit 32 can be displaced in the tracking direction E and the focus direction F by the objective lens drive actuator 30. The focus direction F, which is a direction parallel to the optical axis L2 between the objective lens 52 and the recording surface of the recording disk 45, is a direction substantially perpendicular to the tracking direction E, and the rotation axis of the rotation shaft 53 of the spindle motor 49. The first focus direction F1 is a direction substantially parallel to L1 and is a direction close to the recording surface of the recording disk 45, and a direction away from the recording surface of the recording disk 45, which is opposite to the first focus direction F1. And the second focus direction F2.

The tangential direction G, which is one direction, is
Between the objective lens 52 and the recording surface of the recording disk 45, it is a direction substantially perpendicular to the optical axis L2 and substantially perpendicular to the tracking direction E. It is a direction substantially parallel to the speed direction when rotating around the rotation axis L1.
The tangential direction G is viewed from the objective lens 52,
A first tangential direction G1 that is in the same direction as the speed direction when the recording disk 45 rotates, and a second tangential direction G that is opposite to the first tangential direction G1.
Including 2 and.

The housing 29 has a plate-like shape whose thickness direction is the focus direction F, and a space 38 having a substantially rectangular cross section perpendicular to the focus direction F is formed in the central portion. The downstream side of the housing 29 in the second tracking direction E2 is curved so as to move toward the first tracking direction E1 as it goes in the second tangential direction G2 when viewed from the second focus direction F2.

A first locking portion 54 is formed on the side of the side portion 29a facing the space 38 from the upstream side of the first tangential direction G1 of the housing 29, on the downstream side of the second tracking direction E2 and on the downstream side of the second tangential direction G2. It A through hole that penetrates in the focus direction F is formed in the first locking portion 54. Space 3 on the downstream side of the housing 29 in the second tracking direction E2 and on the downstream side of the first tangential direction G1
In the vicinity of 8, a through hole 29b penetrating the housing 29 in the focus direction F is formed. A second locking portion 55 that protrudes inward in the radial direction of the through hole 29b over the entire circumference is provided on the downstream side of the through hole 29b in the second focus direction F2. As described above, the through hole 29b has a shape in which a cross section parallel to the axis L6 of the through hole 29b and the second locking portion 55 has a substantially convex step.

The first focus direction F is provided downstream of the through hole 29b of the housing 29 in the first tangential direction G1.
A cylindrical fitting protrusion 64 projecting to 1 is formed. A hemispherical support protrusion 31 protruding in the first focus direction F1 is formed near the space 38 on the downstream side of the second tracking direction E2 of the housing 29 and on the downstream side of the second tangential direction G2. Therefore, the support protrusion 31 and the fitting protrusion 64 are formed at intervals in the tangential direction G.

On the downstream side of the first tangential direction G1 and the downstream side of the second tracking direction E2 of the housing 29, a substantially rectangular parallelepiped first support block 41 is provided, and the first support block 41 has a first tracking direction E1. A substantially rectangular parallelepiped second support block 42 is provided on the downstream side. First support block 41 and second support block 42
A circular through hole penetrating in the tracking direction E is provided in the central part of, and an internal screw is engraved in at least one of the through holes. On the downstream side of the housing 29 in the second tangential direction G2, the support piece 43 that projects in the second tangential direction G2 and opens in the direction G2 and has a substantially U-shaped shape when viewed from the tracking direction E is formed.
Is provided.

The optical pickup driving means of the optical disc device 44 is composed of a cylindrical first guide 39 and a second guide 40. The first guide axis L3 of the first guide 39 and the second guide axis L4 of the second guide 40.
Is parallel to the tracking direction E. First guide 39
Is engraved with an external screw and is rotated by a motor (not shown). The first guide 39 is inserted and screwed into the through holes of the first and second support blocks 41 and 42. Second guide 40
Is displaceable in the tracking direction E and fits into the support piece 43. The optical pickup 28 is displaced in the tracking direction E by rotating the first guide 39 by a motor and moving the first guide 39 forward and backward relative to the optical pickup 28.

Second focus direction F of main unit 32
A substantially flat plate-shaped base portion 33 serving as a bottom plate of the main body unit 32 is provided on the downstream side. Body unit 32 is space 3
8 in the state of being fitted in 8, the downstream side of the second tangential direction G2 of the base portion 33 and the first tracking direction E1.
The first connecting portion 56 is formed on the downstream side.

The first connecting portion 56 has a flat plate-shaped one end portion 56a, an intermediate portion 56b, and the other end portion 56c, respectively.
The one end 56a extends in the second tangential direction G2 from the downstream side of the second tangential direction G2 and the downstream side of the first tracking direction E1 of the base portion 33 so as to be substantially parallel to the base portion 33. The intermediate portion 56b extends in the first focus direction F1 from the downstream end of the one end 56a in the second tangential direction G2 so as to be substantially perpendicular to the one end 56a.

The other end portion 56c is the first portion of the intermediate portion 56b.
The second tangential direction G2 extends from the downstream end of the focus direction F1. The other end portion 56c has one end portion 56c.
It is substantially parallel to a. Thus, the first connecting portion 56
Is substantially S-shaped when viewed from the upstream side in the first tracking direction E1, and the other end 56c is arranged so as to face the first locking portion 54 of the housing 29. First connecting portion 56
A first screw attachment portion 58 penetrating in the focus direction F and having an internal thread engraved therein is provided at the center of the other end portion 56c of the.

A second connecting portion 57 is formed downstream of the base portion 33 in the first tangential direction G1 and downstream of the second tracking direction E2. The second connecting portion 57 is
Each has a flat standing portion 57a and one end 57b. The upright portion 57 a of the second connecting portion 57 is formed by the base portion 33.
From the end portion on the downstream side of the second tracking direction E2 and on the downstream side of the first tangential direction G1 in the first focus direction F1 so as to be substantially perpendicular to the base portion 33. The one end portion 57b of the second connecting portion 57 has an upright portion 57a.
From the downstream end of the first focus direction F1 to the second tracking direction E2, the first tangential direction G1. One end 57b of the second connecting portion 57
Is substantially parallel to the base portion 33. One end 57b of the second connecting portion 57 is arranged so as to face the second locking portion 55 of the housing 29.

The one end 57b of the second connecting portion 57 is provided with a second screw attachment portion 59 penetrating in the focus direction F and having an internal thread engraved therein. Further, on the downstream side of the first tangential direction G1 of the second screwing portion 59, the second screwing portion 59 penetrates in a substantially rectangular shape in the focus direction F, opens in the first tangential direction G1, and is perpendicular to the tracking direction E and faces each other. And a fitting portion 65 having a side portion extending in the tangential direction G is formed.

The main unit 32 includes a yoke 37, a tracking coil (not shown), a focus coil 47, a magnet (not shown), a spacer 66, a wire 67 and a lens holder 68. Spacer 66
Is a concave shape that is open in the second tangential direction G2 and is viewed from the focus direction F. The spacer 66 is fixed to the downstream side of the base portion 33 in the first tangential direction G1. The spacer 66 moves in the second tracking direction E2.
On the downstream side and the downstream side of the second tangential direction G2, one ends of two wires 67 extending in parallel to each other in the tangential direction G are supported. Also spacer 6
6 supports one ends of two wires 67 extending in parallel to each other in the tangential direction G on the downstream side of the first tracking direction E1 and the downstream side of the second tangential direction G2.

The lens holder 68 holds the objective lens 52, and a substantially rectangular through hole penetrating in the focus direction F is formed in the center of the lens holder 68. The lens holder 68 is separated from the housing 29 and the base portion 33 at the other end of the four wires 67 extending from the spacer 66 in the second tangential direction G2, and is in the tracking direction E and the focus direction F. Is supported so that it can be displaced. The tracking coil and focus coil 47 are provided in the through hole of the lens holder 68.

The yoke 37 is inserted into the focus coil 47 in the through hole of the lens holder 68 and is provided in the central portion of the base portion 33. The yoke 37 has a cross shape when viewed from the upstream side in the second focus direction F2 and a substantially U shape when viewed from the upstream side in the first tracking direction E1. The magnet is provided at the center of the base portion 33, and the yoke 37 is provided so as to contact the magnet. By changing the direction of the current flowing through the tracking coil and the focus coil 47 to generate an attractive force and a repulsive force, the objective lens 52 is displaced and driven in the tracking direction E and the focus direction F, and the recording surface of the recording disk 45. The light from the light emitting element is focused on.

FIG. 4 shows the third connecting portion 3 of the main unit 32.
FIG. 4 is an enlarged plan view showing a section IV centered on No. 4; FIG. 5 is a sectional view taken along section line S5-S5 in FIG. FIG. 6 is a sectional view taken along the section line S6-S6 in FIG. A third connecting portion 34 is formed on the downstream side of the second tangential direction G2 and the downstream side of the second tracking direction E2 of the base portion 33. The third connecting portion 34 is
Each has a flat plate-shaped one end portion 34a, an intermediate portion 34b, and the other end portion 34c. One end 34a of the third connecting portion 34
Extends in the second tangential direction G2 from the downstream side of the second tracking direction E2 and the downstream side of the second tangential direction G2 of the base portion 33 so as to be substantially parallel to the base portion 33.

The intermediate portion 34b is the second portion of the one end portion 34a.
From the downstream end of the tangential direction G2 to the one end 3
It extends in the first focus direction F1 so as to be substantially perpendicular to 4a. The other end portion 34c extends from the end portion of the intermediate portion 34b on the downstream side in the first focus direction F1 to the intermediate portion 34c.
It extends in the second tangential direction G2 so as to be substantially perpendicular to b. The other end 34c is substantially parallel to the one end 34a. As described above, the third connecting portion 34 is substantially S-shaped when viewed from the first tracking direction E1, and the other end portion 34c is arranged so as to face the support protrusion 31 of the housing 29.

At the central portion of the other end portion 34c of the third connecting portion 34, there is a semi-circular arc projecting in the first tangential direction G1 when viewed from the upstream side in the first focus direction F1.
The semicircular arc projecting in the second tangential direction G2 has an oval shape extending in the tangential direction G and connected by two parallel line segments, and the tangential direction G A semi-cylindrical shape having a uniform cross section perpendicular to is formed into a support recess 35 that is recessed in the first focus direction F1. The support concave portion 35 and the fitting portion 65 are formed in the tangential direction G with a space therebetween.

The radius of the outer peripheral surface of the support protrusion 31 is substantially the same as the radius of the inner peripheral surface of the cross section of the support recess 35 perpendicular to the tangential direction G, and preferably the radius of the outer peripheral surface of the support protrusion 31 is supported. It is slightly smaller than the radius of the inner peripheral surface of the recess 35. In the support concave portion 35, the support protrusion 31 can be angularly displaced around the center of the outer peripheral surface thereof, and the center of the outer peripheral surface is 0.3 (± 0.1) along the tangential direction G.
5) Insert so that it can be displaced by mm. As a result, the support protrusion 31 is angularly displaced around the center of the outer peripheral surface of the support protrusion 31 without being displaced in the tracking direction E, and is displaced in the tangential direction G. The position in the vertical direction can be adjusted.

The body unit 32 is connected via a first adjusting screw 60 and a second adjusting screw 61 so that the posture and the position with respect to the housing 29 can be adjusted. The first and second adjusting screws 60, 61 are generally cylindrical. The end portion 60a of the first adjusting screw 60 and the end portion 61a of the second adjusting screw 61 are formed in the through hole of the first locking portion 54 and the second portion.
The outer diameter is formed larger than the inner diameter of the locking portion 55, and it has a groove into which a tool such as a screwdriver can be fitted. In addition, the end portions 6 of the first and second adjustment screws 60 and 61
0a, 61a, the outer diameter of the remaining portion is smaller than the inner diameter of the through hole formed in the first and second locking portions 54, 55, and the first and second screw threads are formed. External screws that can be screwed are engraved on the attachment portions 58 and 59.

With the main body unit 32 fitted in the space 38, the first locking portion 54 of the housing 29 and the other end portion 56c of the first connecting portion 56 of the main body unit 32 face each other, and the second The locking portion 55 and the one end portion 57b of the second connecting portion 57 of the main body unit 32 face each other, the fitting protrusion 64 of the housing 29 is fitted to the fitting portion 65, and the support protrusion 31 of the housing 29 is the main body unit. 3rd of 32
It is fitted into the support recess 35 of the connecting portion 34. The second connecting portion 57 including the fitting portion 65 is displaceable in the focus direction F and the tangential direction G, and the fitting protrusion 64 fits into the fitting portion 65. Third connection part 3 including support recess 35
The support protrusion 31 fits into the support recess 35 such that the support protrusion 31 is angularly displaceable around the center of the outer peripheral surface of the support protrusion 31 and displaceable in the tangential direction G.

With the support projection 31 fitted in the support recess 35 and the fitting projection 64 fitted in the fitting portion 65, the support projection 31 and the support recess 35 prevent displacement in the tracking direction E. At the same time, the fitting protrusion 64 and the fitting portion 65 can also prevent the displacement in the tracking direction E. As a result, the tangential direction G is made in two places.
The main unit 32 for the housing 29.
The position of can be adjusted by displacing it only in the tangential direction G. Further, since the fitting protrusion 64 and the fitting portion 65 are formed with a space in the tangential direction G with respect to the support protrusion 31 and the support recess 35, the main body unit 32 is positioned with respect to the housing 29 in the focus direction F. It is possible to prevent angular displacement around an axis parallel to.
Therefore, the main body unit 32 can be surely allowed to be displaced only in the tangential direction G with respect to the housing 29, the posture and position can be adjusted, and the posture and position can be adjusted easily and surely. .

In the state where the main body unit 32 is fitted in the space 38, the first spring member 62 is sandwiched by the first locking portion 54 of the housing 29 and the other end portion 56c of the first connecting portion 56. In addition, the second spring member 63 is provided with the second locking portion 55 of the housing 29 and the one end portion 5 of the second connecting portion 57.
It is clamped by 7b. First and second spring member 6
Reference numerals 2 and 63 are spiral compression springs. In this state, the first adjusting screw 60 is inserted into the through hole of the first locking portion 54 and the first spring member 62 and screwed to the first screwing portion 58. The second adjustment screw 61 is attached to the second locking portion 55 and the second spring member 6.
3 and is screwed onto the second screwing portion 59. At this time, the first spring member 62 and the second spring member 63 urge a spring force in a direction in which the housing 29 and the main body unit 32 are separated from each other. In this way, the first adjustment screw 60
The second adjusting screw 61 is engaged with the first engaging portion 54 while being gently inserted into the through hole of the first engaging portion 54.
Is locked to the second locking portion 55 while being gently inserted into the through hole of the second locking portion 55.

As described above, the main body unit 32 is connected via the first adjusting screw 60 and the second adjusting screw 61 so that the attitude with respect to the housing 29 can be adjusted. More specifically, by screwing the first adjustment screw 60 forward and backward, the main body unit 29 is roughly moved to the second screw attachment portion 5.
9 is angularly displaced about a straight line connecting the support projection 31 and the support projection 31. Further, by screwing the second adjusting screw 61 forward and backward, the main body unit 29 is angularly displaced about a straight line connecting the first screw attachment portion 58 and the support protrusion 31. Therefore, the attitude of the main body unit 32 with respect to the housing 29 can be adjusted by angularly displacing the support protrusion 31 around the center of its outer peripheral surface.

Further, the main body unit 32 includes the first adjusting screw 6
The position with respect to the housing 29 is adjustable and is connected via 0 and the second adjustment screw 61. More specifically, the first adjustment screw 60 and the second adjustment screw 61 are
The fitting projection 64 is fitted to the fitting portion 65 so that the fitting projection 64 can be displaced in the tangential direction G, and the support projection 31 is fixed to the tanger. It fits into the support recess 35 so that it can be displaced in the vertical direction G. By this, the support protrusion 3
1 can be displaced in the tangential direction G without being displaced relative to the housing 29 in the direction perpendicular to the focus direction F and the tangential direction G.
Therefore, by displacing the main body unit 32 in the tangential direction G with respect to the housing, the position of the main body unit 32 with respect to the housing 29 can be adjusted.

Further, in performing such position adjustment, since the support protrusion 31 and the support recess 35 are formed in the shape and size as described above, the support protrusion 31 and the support recess 35 are in line contact with each other. , The support projections 31 are less likely to be displaced in the tangential direction G with respect to the support recesses 35 by a slight external force such as vibration, and during the posture and position adjustment,
The body unit 32 does not undesirably change the posture and position with respect to the housing 29 by an external force such as vibration, and the posture and position can be easily adjusted.

The fixing member 36 can maintain the state in which the support protrusion 31 is fitted into the support recess 35 and is in pressure contact therewith. Body unit 32 for the housing 29 described above
The posture and position can be adjusted with the fixing member 36 attached, and may be adjusted after attaching the fixing member 36 or after adjusting the posture and position.
The fixing member 36 has a U-shape when viewed from the upstream side in the second tangential direction G2, and the end portion of the fixing member 36 on the downstream side in the second focus direction F2 faces the housing 29 in the first focus direction F1. The end portion of the fixing member 36 on the downstream side in the first focus direction F1 is pressed against the second support end portion 34 by pressing.
The pressure contact is made in the focus direction F2. The fixed member 36 after attachment can be removed by moving it in the second tracking direction E2, which is convenient.

By fixing the housing 29 and the main body unit 32 with the fixing member 36, it is ensured that the support projection 31 and the support recess 35 are in line contact with each other in an arc-shaped line region in a cross section perpendicular to the tangential direction G. Can be maintained at. By pressing the support projections 31 in this manner, the support projections 31 are pressed against the support recesses 35 by, for example, an impact.
Since it is possible to prevent the displacement in the direction perpendicular to the
Can hold the position of. Also, the first and second spring members 6
0 and 61 apply a spring force to the housing 29 and the main body unit 32 in the direction of separating them. Therefore, the fixing member 3
After the housing 29 and the main body unit 32 are fixed by pressure contact with each other at 6, the support protrusion 31 can be prevented from being angularly displaced by the spring force.

FIG. 7 is an enlarged plan view showing the vicinity of the third connecting portion 34 of the optical pickup 28A according to the second embodiment of the present invention. FIG. 8 is a sectional view taken along the section line S8-S8 in FIG. FIG. 9 shows the section line S9-S9 of FIG.
It is sectional drawing seen from. The optical pickup 28A of the second embodiment of the present invention is the same except the shape of the support recess 35 of the other end 34c of the third connecting portion 34 of the optical pickup 28 of the first embodiment described above. Since this is a configuration, the description will be omitted.

In the optical pickup 28 of the above-described first embodiment, the inner surface of the support recess 35 has a semi-cylindrical shape whose cross-sectional shape perpendicular to the tangential direction G is uniform in the tangential direction G. In the optical pickup 28A of the second embodiment, the inner surface of the support recess 35A has a V-shaped cross section perpendicular to the tangential direction G. The support recess 35A is formed in the center of the other end 34c of the third connecting portion 34.

The cross-sectional shape of the inner surface of the support recess 35A perpendicular to the tangential direction G is tangential direction G
Since it has a uniform V-shape, the support protrusion 31 fits in contact with the inner surface of the support recess 35A at two points. In the support recess 35A, the support protrusion 31 can be angularly displaced around the center of the outer peripheral surface thereof, and the center of the outer peripheral surface can be displaced by 0.3 (± 0.15) mm in the tangential direction G. Fit in.

As a result, the support protrusion 31 is angularly displaced and displaced in the tangential direction G around the center of the outer peripheral surface of the support protrusion 31 without being displaced in the direction perpendicular to the focus direction F and the tangential direction G. The posture and position of the main body unit 32 with respect to the housing 29 can be easily adjusted. Of course, in the present embodiment, the same effect can be achieved, except for the effect that the inner surface of the support recess 35 obtained in the first embodiment is cylindrical.

FIG. 10 is a plan view showing an optical pickup 69 according to the third embodiment. FIG. 11 is a sectional view taken along the section line S11-S11 of FIG. Figure 12
It is sectional drawing seen from the cutting plane line S12-S12 of FIG. The optical pickup 69 according to the third embodiment includes a first connecting portion 56, a second connecting portion 57, a third connecting portion 34, and a fitting portion in the main body unit 32 of the optical pickup 28 according to the first embodiment described above. Except for 65 and the fitting protrusion 64 in the housing 29, the structure is the same, so the description of the same structure is omitted and the same reference numerals are given. In the optical pickup 69 of the present embodiment, the attitude of the main body unit 32 with respect to the housing 29 and the position in the tracking direction E can be adjusted.

First tracking direction E of the housing 29
On the downstream side of the first tangential direction G2 and the downstream side of the first tangential direction G2, a cylindrical fitting protrusion 64B protruding in the first focus direction F1 is formed.

The first connecting portions 75 of the main body unit 32 each have a flat plate-shaped standing portion 75a and one end portion 75b. The standing portion 75a of the first connecting portion 75 is substantially perpendicular to the base portion 33 from the end portion on the downstream side of the first tracking direction E1 and the downstream side of the second tangential direction G2 of the base portion 33. It extends in the first focus direction F1.

The one end portion 75b of the first connecting portion 75 extends in the second tangential direction G2 from the end portion of the upright portion 75a on the downstream side in the first focus direction F1 and also the first end portion 75b.
It extends in the tracking direction E1. The one end 75b of the first connecting portion 75 is provided with a first screw attachment portion 58 penetrating in the focus direction F and having an internal thread engraved therein. A fitting portion 65B is formed on the downstream side of the one end portion 75b in the first tracking direction E1. The fitting portion 65B has side portions that penetrate in the focus direction F, open in the first tracking direction E1, extend in the tracking direction E so as to face each other, and are perpendicular to the tangential direction G.

The second connecting portions 78 of the main body unit 32 each have a flat plate-shaped standing portion 78a and one end portion 78b. The standing portion 78a of the second connecting portion 78 is substantially perpendicular to the base portion 33 from the end portion of the base portion 33 on the downstream side of the second tracking direction E2 and on the downstream side of the first tangential direction G1. It extends in the first focus direction F1. The one end portion 78b of the second connecting portion 78 has the standing portion 78.
It extends in the second tracking direction E2 from the downstream end of the first focus direction F1 in the first focus direction F1 and in the first tangential direction G1. One end portion 78b of the second connecting portion 78
Is substantially parallel to the base portion 33. The one end 78b of the second connecting portion 78 is provided with a second screw attachment portion 59 penetrating in the focus direction F and having an internal thread engraved therein.

The third connecting portion 76 is formed of a flat plate-shaped one end portion 76a, an intermediate portion 76b, and the other end portion 76c. The one end portion 76 a of the third connecting portion 76 has the base portion 33.
From the downstream side of the second tracking direction E2 and the downstream side of the second tangential direction G2 so as to be substantially parallel to the base portion 33 in the second tangential direction G2.

The intermediate portion 76b is the second end of the one end portion 76a.
From the downstream end of the tangential direction G2 to the one end 7
It extends in the first focus direction F1 so as to be substantially perpendicular to 6a. The other end portion 76c extends from the end portion of the intermediate portion 76b on the downstream side in the first focus direction F1 to the intermediate portion 76c.
It extends in the second tangential direction G2 so as to be substantially perpendicular to b. The other end portion 76c is substantially parallel to the one end portion 76a. Thus, the third connecting portion 76 is substantially S-shaped when viewed from the first tracking direction E1, and the other end portion 76c is arranged so as to face the support protrusion 31 of the housing 29.

At the central portion of the other end portion 76c of the third connecting portion 76, a semi-circular arc that protrudes in the first tracking direction E1 when seen from the upstream side in the first focus direction F1 is provided.
The semi-circular arc projecting in the tracking direction E2 has an elliptical shape that extends in the tracking direction E and is connected by two parallel line segments, and is perpendicular to the inner surface tracking direction E. A supporting recess 77 is formed which has a semi-cylindrical shape with a uniform cross section in the tracking direction E and is recessed in the first focus direction F1. In the support recess 77, the support protrusion 31 can be angularly displaced around the center of the outer peripheral surface thereof, and the center of the outer peripheral surface can be displaced by 0.3 (± 0.15) mm along the tracking direction E. Fit into the support recess 77.

With the support protrusion 31 fitted in the support recess 77 and the fitting protrusion 64B fitted in the fitting portion 65B, the displacement in the tangential direction G is caused by the support protrusion 31 and the support recess 77. At the same time, the fitting protrusion 64 and the fitting portion 65 simultaneously prevent the tangential direction G.
The displacement of can be prevented. With this, the position of the main body unit 32 with respect to the housing 29 can be adjusted by displacing it in the tracking direction E at two places.

With the support projection 31 fitted in the support recess 77 and the fitting projection 64B fitted in the fitting part 65B, the displacement in the tangential direction G is caused by the support projection 31 and the support recess 77. At the same time, the fitting protrusion 64B and the fitting portion 65B can also prevent the displacement in the tangential direction G. As a result, the guide in the tracking direction E is provided at two places, and the position of the main body unit 32 with respect to the housing 29 can be adjusted by displacing only in the tracking direction E. Also, the fitting protrusion 64B and the fitting portion 6
5B is formed with a space in the tracking direction E with respect to the support protrusion 31 and the support recess 77, so that the main body unit 32 is angularly displaced with respect to the housing 29 about an axis parallel to the focus direction F. Can be prevented. Therefore, the main unit 32 is attached to the housing 29.
On the other hand, it is possible to reliably allow only the displacement in the tracking direction E to enable posture adjustment and position adjustment, and to easily and surely adjust the posture and position.

Since the inner surface of the support recess 77 has a cylindrical shape whose cross section perpendicular to the tracking direction E is uniform in the tracking direction E, at the moment when it is fixed by the fixing member 36,
The support protrusion 31 and the support recess 77 are arranged in the tracking direction E.
Make a circular arc-shaped line contact in a cross section perpendicular to. As a result, the support protrusion 31 can be prevented from being displaced in the direction perpendicular to the tracking direction E and the focus direction F, so that the main body unit 3 with respect to the adjusted housing 29 can be prevented.
It can hold 2 positions. Thus, in this embodiment,
A similar effect can be achieved with different adjustable positions.

In the optical pickups 28, 28A according to the first and second embodiments of the present invention, the supporting recesses 35, 35A are used.
The inner surface of is a semi-cylindrical shape and a V shape whose cross-sectional shape perpendicular to the tangential direction G is uniform in the tangential direction G, but is not limited to these, and for example, the inner surfaces of the supporting recesses 35, 35A. However, in the cross section perpendicular to the tangential direction G, the cross-sectional shape that is in contact with the outer surface of the support protrusion 31 at three points and is perpendicular to the tangential direction G is a uniform concave shape in the tangential direction G. Good.

Further, in the third embodiment of the present invention,
The inner surface of the support recess 77 has a semi-cylindrical shape in which the cross-sectional shape perpendicular to the tracking direction E is uniform in the tracking direction E, but is not limited to this and may be, for example, a V-shape.

In the optical pickups 28, 28A and 69 of the first to third embodiments of the present invention, the support protrusion 31 is formed on the housing 29 and the support recesses 35, 35A and 77 are formed on the main body unit 32. However, the supporting recesses 35, 35A, 77 may be formed in the housing 29 and the supporting protrusion 31 may be formed in the main body unit 32.

In the optical pickups 28, 28A and 69 according to the first to third embodiments of the present invention, the housing 29 is formed with the first locking portion 54 and the second locking portion 55, and the main body unit 32 is , First screwing portion 58 and second screwing portion 59
However, the first screw attachment portion 5 is formed on the housing 29.
8 and the second screw attachment portion 59 are formed, and the main body unit 32
The first locking portion 54 and the second locking portion 55 may be formed in the.

In the optical pickups 28, 28A and 69 of the first to third embodiments of the present invention, the housing 29 is provided with the fitting protrusions 64 and 64B, and the main unit 3 is formed.
Although the fitting portions 65 and 65B are formed on the housing 2, the fitting portions 65 and 65B may be formed on the housing 29 and the fitting protrusions 64 and 64B may be formed on the main body unit 32.

[0088]

As described above, according to the present invention, the posture of the main body unit with respect to the housing can be adjusted by angularly displacing the support protrusion around the center of the outer peripheral surface thereof, and the support protrusion can be moved in the one direction. The position can be adjusted only in one direction with respect to the housing by displacing the main body unit. As a result, the posture and position of the body unit with respect to the housing do not depend on the dimensional precision of each component of the optical pickup, and the posture and position of the body unit with respect to the housing can be easily adjusted even after the optical pickup is assembled. The pickup can accurately focus the light from the light receiving element on the recording surface of the recording disk. Moreover, by limiting the position adjustment in only one direction, it is possible to prevent undesired displacement of the main body unit with respect to the housing, and to facilitate posture and position adjustment.

Further, according to the present invention, the inner surface of the support recess is
Since the cross-sectional shape perpendicular to the one direction is a uniform cylindrical shape in the one direction, the support protrusion fits in line contact with the inner surface of the support recess in the one direction. As a result, the support projection is prevented from being displaced in the direction perpendicular to the one direction and the direction perpendicular to the optical axis in the state of being fitted into the support recess, so that the attitude adjustment of the main body unit with respect to the housing and the position adjustment in only one direction are performed. Can be realized.

Further, according to the present invention, the inner surface of the support recess is
Since the cross-sectional shape perpendicular to the one direction is a V-shape that is uniform in the one direction, the support protrusion fits in contact with the inner surface of the support recess at two points. As a result, the support projection is prevented from being displaced in the direction perpendicular to the one direction and the direction perpendicular to the optical axis in the state of being fitted into the support recess, so that the attitude adjustment of the main body unit with respect to the housing and the position adjustment in only one direction are performed. Can be easily realized.

Further, according to the present invention, the attitude of the main body unit with respect to the housing can be adjusted by moving the adjusting screw forward and backward with respect to the screw attachment portion. At this time, since the spring force is applied to the housing and the main body unit in the direction in which they are separated from each other by the spring member, the adjusting screw adjusts the posture of the main body unit with respect to the housing more accurately without being displaced in the axial direction with respect to the through hole. can do. As a result, in the process of assembling the optical pickup, it is not necessary to make adjustments while measuring with a measuring device, and the attitude and position of the main body unit with respect to the housing can be easily adjusted. Can be accurately focused on the recording surface of the recording disk.

Further, according to the present invention, the support projection is fitted in the support recess, and the fitting projection is fitted in the fitting portion in addition to the displacement in the direction perpendicular to the one direction and perpendicular to the optical axis. Can be prevented at two places, and the position of the main body unit with respect to the housing can be surely adjusted only in the one direction. As a result, the optical pickup can accurately and reliably focus the light from the light receiving element on the recording surface of the recording disk.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of an optical pickup 28 according to a first embodiment, which is cut away.

2 is a plan view showing an optical disc device 44. FIG.

3 is a front view showing an optical disc device 44. FIG.

FIG. 4 is an enlarged plan view showing a section IV of the main body unit 32 around a third connecting portion 34.

5 is a sectional view taken along the section line S5-S5 in FIG.

6 is a cross-sectional view taken along section line S6-S6 of FIG.

FIG. 7 is an enlarged plan view showing the vicinity of a third connecting portion of the optical pickup 28A according to the second embodiment.

8 is a sectional view taken along the section line S8-S8 in FIG. 7.

9 is a sectional view taken along the section line S9-S9 in FIG. 7.

FIG. 10 is a plan view showing an optical pickup 69 according to a third embodiment.

11 is a sectional view taken along the section line S11-S11 in FIG.

12 is a sectional view taken along the section line S12-S12 in FIG.

FIG. 13 is a perspective view showing a conventional optical pickup 1 with a part thereof cut away.

14 is a plan view showing the optical pickup 1. FIG.

FIG. 15 is a side view of a part of the optical pickup 1 that is cut away and is seen from the upstream side in the first tracking direction A1.

FIG. 16 is a front view of a part of the optical pickup 1 that is cut away and is viewed from the upstream side in the first tangential direction C1.

FIG. 17 is a plan view showing another conventional optical pickup 22.

[Explanation of symbols]

28, 28A, 69 Optical pickup 29 housing 31 Support protrusion 32 main unit 35, 35A, 77 support recess 52 Objective lens 54 First locking portion 55 Second locking part 58 First screwing part 59 Second screwing part 60 First adjustment screw 61 Second adjusting screw 62 First Spring Member 63 Second spring member 64, 64B mating protrusion 65,65B Mating part

Claims (5)

[Claims] 1. A main body unit having a housing, a lens member that is angularly displaceably held in the housing, and that collects light from a light emitting element onto a recording surface of a recording disk, and an adjustment that adjusts a posture of the main body unit with respect to the housing. In the optical pickup including the means, the housing has a support projection having a spherical outer surface and the support projection is angularly displaceable around the center of the outer peripheral surface thereof in one direction perpendicular to the optical axis of the light from the light emitting element. An attitude and position adjusting structure of an optical pickup, characterized in that either one of the supporting recesses that are displaceably fitted is formed, and the other of the supporting projections and the supporting recesses is formed in the main body unit. 2. The attitude and position adjusting structure of an optical pickup according to claim 1, wherein an inner surface of the support recess is a cylindrical shape having a cross-sectional shape perpendicular to the one direction that is uniform in the one direction. . 3. The attitude and position adjustment of the optical pickup according to claim 1, wherein an inner surface of the support recess has a V-shaped cross section perpendicular to the one direction. Construction. 4. The adjusting means has an adjusting screw on which an external screw is engraved, and a spring member for applying a spring force in a direction separating from the housing and the main body unit in the vicinity of the adjusting screw. One of a locking portion for locking the adjustment screw in a state where the adjustment screw is gently inserted into the through hole and a screwing portion for screwing the adjustment screw to adjust the position is formed. The attitude and position adjusting structure of the optical pickup according to claim 1, wherein the other one of the locking portion and the screwing portion is formed. 5. The housing is provided with one of a fitting protrusion and a fitting portion into which the fitting protrusion fits movably in the direction along the optical axis and in the one direction. 5. The other one of the fitting protrusion and the fitting portion is formed.
The attitude and position adjusting structure of the optical pickup according to any one of 1.