JP2002074710A - Optical pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To tilt an objective lens-mounted lens-holder around the X-axis. SOLUTION: In the optical pickup device 10 in which the objective lens 14 mounted lens holder 15 is supported in a rockable manner on wire supporting parts 19b, 19b that are formed left and right in the width direction of a suspension base 19 through four suspension wires 18 in two vertical pairs; the suspension base 19 is formed with an isosceles trapezoid 19a, which is resin-made with the hollowed inside, in the center part in the width direction; the base 19a1 of this trapezoid 19a is fastened on a fixed base 11 orthogonally to the X-axis, with flexibility imparted to the isosceles parts 19a2, 19a2 of the trapezoid 19a; the wire supporting parts 19b, 19b are formed left and right adjacently to the upside 19a3 of the trapezoid 19a; and, when the lower face of one wire supporting part 19b is pushed up, the isosceles parts 19a2, 19a2 are flexed around the X-axis, thereby enabling the lens holder 15 to be tilt-adjusted around the X-axis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup device for recording an information signal on an optical disk or a magneto-optical disk or reproducing an information signal recorded on an optical disk or a magneto-optical disk. The present invention relates to an optical pickup device provided with a tilt adjustment mechanism for causing a beam to be perpendicularly incident on a signal surface of an optical disk or a magneto-optical disk.

[0002]

2. Description of the Related Art Generally, an optical pickup device for recording an information signal on an optical disk or a magneto-optical disk (hereinafter collectively referred to as an optical disk) or reproducing an information signal recorded on the optical disk has an objective lens. A writing light beam or a reading light beam emitted from the optical disk while being focused on the signal surface of the optical disk, and
Since the light beam needs to follow the track direction of the optical disk, the objective lens is supported so as to be swingable in the focus direction, which is the optical axis direction, and in the track direction of the optical disk.

At this time, the objective lens attached to the lens holder may be inclined with respect to the signal surface of the optical disc due to the assembled state of each component constituting the optical pickup device, or the objective lens may be attached to the objective lens. Because the light beam emitted from the objective lens does not enter the signal surface of the optical disk perpendicularly due to the presence of aberrations, the light beam cannot be focused on the signal surface of the optical disk in a predetermined spot shape. It is necessary to adjust the tilt of the objective lens, and the applicant of the present invention has previously proposed in Japanese Patent Application Laid-Open No. 9-44879 a device in which an optical pickup device is provided with a tilt adjusting mechanism for adjusting the tilt of the objective lens. are doing.

FIG. 3 is an exploded perspective view showing a conventional optical pickup device in an exploded manner for explaining the same, FIG. 4 is a perspective view showing an assembled state of the conventional optical pickup device, and FIG. 5 is a conventional optical pickup device. In a typical pickup device, X
It is the figure which showed the shaft tilt mechanism typically.

A conventional optical pickup device shown in FIGS. 3 and 4 is disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 9-44879.

In FIG. 3, in a conventional optical pickup device 100, a fixed base 101 serving as a base is formed integrally with a rigid frame using a soft magnetic metal material. On the upper surface 101a of the fixed base 101, an opening 101b is widely opened at a front portion in the longitudinal direction (left side in the figure), and the opening 101b is an optical path to an objective lens 104 described later. In addition, fixed base 1
A pair of suspension base supporting portions 10 along the longitudinal direction on the upper surface 101a of
1c and 101c are opposed to each other and protrude upward, and a pair of suspension base support portions 1c and 101c are provided.
V-grooves 101 d, 1
01d are formed, and these V-grooves 101d and 10d are formed.
A suspension base 111 described later is supported by 1d. Further, the yoke 1 is raised on the left and right inner sides with the opening 101b opened on the fixed base 101 interposed therebetween.
01e, 101e, and 101f,
101f face each other on the inside and outside. The outer yokes 101f, 101f
A pair of magnets 102, 102 are fixed inside the
Further, the pair of magnets 102, 102 also face the inner yokes 101e, 101e.

Further, a wall 101g provided in front of the fixed base 101 and outer yokes 101f provided on the left and right side surfaces are provided.
A pair of mounting bases 101h, 101h are provided to protrude upward facing each other, and arc-shaped projections 101i, 101i are formed on upper outer portions of the pair of mounting bases 101h, 101h. These arc-shaped projections 101i, 101i serve as pivot points of the fixed base 101. Then, the above-mentioned arc-shaped projection 1
When the fixed base 101 is mounted on the V-shaped grooves Iv, Iv formed on the left and right side surfaces of the movable base I shown in FIG. 4, the fixed base 101 is supported so as to be rotatable around the Y axis. ing. At this time, the Y axis is set on a line passing through the lens center of the objective lens 104 at right angles to an X axis described later.

Next, the movable section 103 is provided with an objective lens 104.
And a lens holder 105 for mounting the objective lens 104
A pair of focusing coils 107 fixed to the left and right side surfaces of the balancer 106 and the lens holder 105,
107 and these focusing coils 107, 10
A pair of left and right tracking coils 1 fixed to the outside of 7
08, 108, lens holder 105 and balancer 10
6, a printed wiring board 110 for connecting the above-mentioned coils 107 and 108 and fixing one end of two vertically upper and lower elastically displaceable suspension wires 109 in a C-shape (the lower side is shown in the figure). Are omitted) and. At this time, the movable part 103 is fixed base 1
01 and is located above the opening 101b opened to
A pair of left and right focusing coils 107, 107 fixed to the lens holder 105 are inserted into yokes 101e, 101e rising from the fixed base 101 to the left and right inside.

Next, a pair of suspension base support portions 101c, 101c provided on the rear end side of the fixed base 101 are provided.
A suspension base 111 for swingably supporting the movable portion 103 via upper and lower two-to-four suspension wires 109 is integrally formed using a resin material capable of elastic displacement. Although the suspension base 111 is separated from the movable portion 103, when the suspension base 111 is fixed to the pair of suspension base supporting portions 101c, 101c, two to four upper and lower suspension wires 109 are provided.
The movable portion 103 is swingably supported via the.

This suspension base 111 has a rectangular base 111a formed at the center in the width direction, and
An arc-shaped projection 1 is provided on the front and rear lower parts of the base 111a in the longitudinal direction.
11b, (111b) are formed, and these arc-shaped projections 111b, (111b) serve as pivot points of rotation of the suspension base 111. Then, the above-mentioned arc-shaped projections 111b, (111b) are
1 and a pair of suspension base support portions 101
When the suspension base 111 is mounted on the V-grooves 101d, 101d formed in c, 101c, the suspension base 111 is supported so as to be rotatable around the X axis. The X-axis is set on a line connecting the lens center of the objective lens 104 and the central portion of the suspension base 111 in the width direction.

In addition, at the front portion of the base 111a with the base 111a formed on the suspension base 111 interposed therebetween, C-shaped grooves 111c, 111c (the lower portion is not shown).
Are formed on the upper surface and the lower surface, and two to four upper and lower suspension wires 109 are inserted therethrough.

Further, thin wire support portions 111d, 111d are formed at the rear portion of the base portion 111a on both sides of the base portion 111a with the base portion 111a formed on the suspension base 111 therebetween. Upper and lower two to four V formed above and below 111d, 111d
Two (2) and four (4) suspension wires 10 in the upper and lower grooves 111e
9 is supported at the other end.

A pair of screw holes 101j, 101 are provided at positions corresponding to the lower surfaces near the lower surfaces of the left and right wire support portions 111d, 111d formed on the suspension base 111 on the rear side in the longitudinal direction (right side in the figure) of the fixed base 101.
j are formed and these screw holes 101j, 101
j, adjusting screws 112 and 11
2 is to be inserted.

An arc-shaped projection 11 formed on the base 1111a of the suspension base 111 in a state where the movable portion 103 is swingably supported on the suspension base 111 by two to four suspension wires 109 vertically.
1b and (111b) are formed in the V-groove 10 formed in the suspension base support portions 101c and 101c of the fixed base 101.
1d and 101d, the upper surface of the suspension base 111 and the back surface of the fixed base 101 are sandwiched between leaf springs 113 which are bent and biased in a U-shape.
Is covered with a lens cover 114, the optical pickup device 100 is assembled as shown in FIG.

Here, the upper surface of the suspension base 111 and the back surface of the fixed base 101 are sandwiched between the leaf springs 113 so that the suspension base 111 is centered on the arc-shaped projections 111b and (111b).
Move in the direction of rotation to the side to which it is biased, but the wire support portions 111 formed on the left and right of the suspension base 111
The suspension base 111 is formed in an arc shape by pushing up the lower surface in the vicinity of the lower surface of one of the wire support portions 111d of one of the adjustment screws 112 inserted into the screw holes 101j from the rear surface of the fixed base 101. The fine rotation position around the X axis around the projections 111b and (111b) can be easily adjusted (X axis tilt adjustment), and the movable portion 103 supported by the suspension base 111 is also integrated with the X axis. Rotate around. At this time, the X-axis tilt adjustment is also referred to as radial tilt adjustment because the objective lens 104 is tilted in a radial direction perpendicular to the track of the optical disk integrally with the lens holder 105 constituting the movable section 103.

The fixed base 101 can also be adjusted (y-axis tilt adjustment) about a Y-axis orthogonal to the X-axis, as described above. , 101h, the fixed base 101 is rotated about the Y axis when the arc-shaped projections 101i, 101 are mounted on the V-shaped grooves Iv, Iv formed on the left and right side surfaces of the movable base I shown in FIG. ing. At this time, the Y-axis tilt adjustment is performed by adjusting the lens holder 10 constituting the movable portion 103.
Since the objective lens 104 is tilted in the tangential direction of the track of the optical disk integrally with the optical disk 5, it is also called tangential tilt adjustment.

Further, the focus control operation and the tracking control operation of the optical pickup device 100 will be briefly described.

First, a pair of focusing coils 10
When the focus control signal is applied to the fixed bases 7 and 107, two sets of yokes (101e and 101e)
e), (101f, 101f) and a pair of magnets 1
Since the movable portion 103 supported by the four suspension wires 109 via the suspension base 111 oscillates up and down due to the electromagnetic force in the focus direction (vertical direction) due to the magnetic field formed by the magnetic fields 02 and 102, The focus of the objective lens 104 attached to the movable portion 103 is controlled in the optical axis direction, and the light spot from the objective lens 104 is focused on the recording track of the optical disk.

A pair of tracking coils 108,
When a tracking control signal is applied to the fixed base 101, two sets of yokes (101 e and 101 e)
e), (101f, 101f) and a pair of magnets 1
The movable portion 103 supported by the four suspension wires 109 via the suspension base 111 oscillates left and right because of receiving the electromagnetic force in the tracking direction (left and right direction) due to the magnetic field formed by the magnetic fields 02 and 102. Accordingly, tracking of the objective lens 104 attached to the movable portion 103 in the radial direction of the recording track of the optical disk is controlled, and the light spot from the objective lens 104 can trace a desired recording track.

[0020]

By the way, in the above-mentioned conventional optical pickup device 100, the objective lens 104 attached to the lens holder 105 moves with respect to the signal surface of the optical disk due to the assembly state of each component. The above-described X-axis tilt adjustment and Y-axis tilt adjustment can be performed depending on whether the object is tilted or the object lens 104 has an aberration. Can be perpendicularly incident on the signal surface of the optical disc, but in particular, the X-axis tilt adjustment mechanism is complicated because the rotation support points are provided on the fixed base 101 side and the suspension base 111 side. As a result, the die cost and the component cost for the fixed base 101 and the suspension base 111 increase.

As shown in FIGS. 5A and 5B,
In the X-axis tilt adjustment mechanism described above, the arc-shaped projection 111b formed on the base 111a of the suspension base 111
To the suspension base support 10 of the fixed base 101.
In a state where the objective lens 104 is placed on the V-shaped groove 101d formed in 1c and the height position of the arc-shaped projection 111b serving as a rotation fulcrum is set with the upper surface of the fixed base 101 as a reference position.
5 is set lower than the lens center O of FIG.
As shown in FIG.
When the suspension base 111 is not tilted around the X axis, as shown in FIG. 5B, there is no hindrance, but when the suspension base 111 is tilted around the X axis, the lens center O of the objective lens 104 becomes the lens center O ′. , There is a problem that the objective lens 104 cannot be tilted around the ideal lens center O.

[0022]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a lens holder having an objective lens mounted thereon, supporting one end of a plurality of suspension wires, and The other end is supported by a wire supporting portion formed on the left and right in the width direction of the suspension base mounted on the fixed base, and the objective lens is integrally formed with the lens holder via the plurality of suspension wires in the focus direction of the optical disc and In an optical pickup device configured to be swingable in a tracking direction, a line connecting a lens center of the objective lens and a central portion in a width direction of the suspension base is indicated by X.
When the suspension base is set, the suspension base forms an isosceles trapezoid part with a hollowed-out part at the center in the width direction using an elastically displaceable resin material or the like, and the bottom side of the isosceles trapezoid part is It is fixed on a fixed base at right angles to the X axis, and the isosceles part of the isosceles trapezoid has flexibility, and is connected to the upper side of the isosceles trapezoid to support the wire to the left and right. When the lower surface of one of the left and right wire support portions is pushed up, the equal leg portion is flexible around the X axis, and the objective lens is integrally formed with the lens holder. An optical pickup device characterized in that X-axis tilt adjustment (radial tilt adjustment) can be performed on the optical disc.

In the optical pickup device according to the present invention, a virtual intersection point where the isosceles portions of the isosceles trapezoidal portion formed on the suspension base are virtually extended and joined to each other is a lens of the objective lens. An optical pickup device substantially coincident with a center height position.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the optical pickup device according to the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a perspective view showing an optical pickup device according to the present invention, and FIG. 2 is a diagram schematically showing an X-axis tilt mechanism in the optical pickup device according to the present invention.

In the optical pickup device according to the present invention, the tilt of the objective lens generated due to the assembly state of the device or the aberration of the objective lens can be changed around the X axis (X axis tilt) and around the Y axis (Y axis). When configured to be tiltable, tilting around the X-axis (X-axis tilt) can be accurately and reliably performed with a simple structure.

As shown in FIG. 1, in an optical pickup device 10 according to the present invention, a fixed base 11 serving as a base is formed integrally with a rigid frame using a soft magnetic metal material. An opening 11b is widely opened on the upper surface 11a of the fixed base 11 at a front portion in the longitudinal direction (left side in the figure), and the opening 11b serves as an optical path to an objective lens 14 described later. Further, a pair of yokes 11c, 11c are raised upward facing each other at an upper right intermediate portion of the fixed base 11 with the opening 11b interposed therebetween.
A pair of magnets 12, 12 are fixed to the inside of 1c, 11c so as to face each other. Further, a pair of mounting bases 11d, 11d are provided on the left and right side surfaces on the left side in the drawing of the fixed base 11 so as to face each other and project upward, and circles are formed at upper outer portions of the pair of mounting bases 11d, 11d. Arc-shaped projections 11e, 11e are formed, and these arc-shaped projections 11e, 11e serve as pivot points of rotation of the fixed base 11. Then, when the above-mentioned arc-shaped projections 11e, 11e are placed on the V-shaped grooves Iv, Iv formed on the left and right side surfaces of the movable base I, the fixed base 11 is supported so as to be rotatable around the Y axis. Has become. At this time, the Y axis described above is
This is set on a line passing through the lens center of the objective lens 14 at right angles to the X axis described later.

Next, the movable section 13 includes an objective lens 14 and
A lens holder 15 having attached thereto an objective lens 14 and projectingly formed on each of the left and right side surfaces, a wire supporting portion 15a for fixing one end of a two-to-four suspension wire 18 described later, and a focusing coil fixed to the lens holder 15 16 and a pair of front and rear tracking coils 17 and 1 fixed to the outside of the focusing coil 16.
7 are integrally formed. At this time, the movable part 13
Is an opening 11 opened on the upper surface 11a of the fixed base 11.
b, and is inserted between a pair of magnets 12 fixed to the inside of the yokes 11c, 11c standing up and down from the fixed base 11. Next, on the upper surface 11a of the fixed base 11, further on the right side than the right yoke 11c, a suspension base 19 for swingably supporting the movable portion 13 via upper and lower two to four suspension wires 18 is provided. The suspension base 19 is a member constituting a main part of the present invention.

The above-mentioned suspension base 19 is integrally formed by using a resin plate material that is elastically displaceable, and has a trapezoidal trapezoidal portion 19 with a hollow inside at the center in the width direction.
a is formed. Bottom 1 of this isosceles trapezoid 19a
9a1 is formed with rigidity and is fixed to the upper surface 11a of the fixed base 11 by a screw, an adhesive, a shrink fit, or the like at right angles to the X axis without being elastically deformed. Also, left and right equal legs 19a2 of the equal leg trapezoidal portion 19a,
Reference numeral 19a2 is formed with flexibility by the elastic force of the resin material, and a virtual intersection P formed by virtually extending the left and right equal legs 19a2 and 19a2 upward and joining the fixed base 1 to each other.
The height is set so as to be substantially the same as the height position of the lens center O (FIG. 2) of the objective lens 14 with reference to the upper surface 11a of the objective lens 1. These left and right equal legs 19a2, 19a2
Has a function of tilting the objective lens 14 about the X-axis integrally with a lens holder 15 constituting the movable portion 13 swingably supported on a suspension base 19 via upper and lower two-to-four suspension wires 18 as described later. Have.
At this time, the X axis is set on a line connecting the lens center of the objective lens 14 and the central portion of the suspension base 19 in the width direction.

The upper side 19a3 of the isosceles trapezoid 19a
Are formed with rigidity, and further connected to the upper side portion 19a3, and left and right wire support portions 19b, 19b are formed downward with rigidity in a gate shape, and are punched into these left and right wire support portions 19b, 19b. 2 to 4 top and bottom holes 19c
The other end of the suspension wire 18 is fixed.

The lower surfaces of the wire support portions 19b, 19b formed on the left and right of the suspension base 19 are separated from the upper surface 11a of the fixed base 11. A pair of screw holes 11f, 11f are formed on the left and right of the upper surface 11a of the fixed base 11 below the lower surfaces of the wire support portions 19b, 19b.
f is formed, and adjustment screws 20, 20 are inserted into these screw holes 11f, 11f from the back surface of the fixed base 11.

Then, the lens holder 15 having the objective lens 14 attached thereto is connected to the upper and lower two-to-four suspension wires 1.
Equal-leg trapezoidal portion which is swingably supported by wire support portions 19b, 19b formed on the left and right in the width direction of the suspension base 19 via the base 8 and has a hollow portion at the center in the width direction of the suspension base 19 With the 19 a fixed on the fixed base 11, the lower surface of one of the wire support portions 19 b formed on the left and right of the suspension base 19 is inserted into the screw hole 11 f from the back surface of the fixed base 11. By pushing up at the upper end of one of the adjusting screws 20, the left and right isosceles trapezoids 19 a 2 and 19 a 2 of the isosceles trapezoid 19 a are flexed around the X axis, and the objective lens 14 is integrated with the lens holder 15 onto the optical disc. On the other hand, the X-axis tilt can be adjusted. At this time, as described above, the X-axis tilt adjustment is also referred to as radial tilt adjustment because the objective lens 14 is tilted in a radial direction perpendicular to the track of the optical disk integrally with the lens holder 15 constituting the movable portion 13. Have been.

The fixed base 11 can also be adjusted (y-axis tilt adjustment) about a Y-axis orthogonal to the X-axis, as described above. , 11d, arc-shaped projections 11e,
11e are V-grooves Iv,
When mounted on Iv, the fixed base 11 is rotated around the Y axis. At this time, the Y-axis tilt adjustment is also referred to as tangential tilt adjustment because the objective lens 14 is tilted in the tangential direction of the track of the optical disk integrally with the lens holder 15 constituting the movable portion 13.

Here, the X-axis tilt adjusting mechanism, which is a main part of the present invention, will be described more specifically with reference to FIGS. 2A and 2B. As shown in FIG. Inserted into the screw holes 11f, 11f from the back surface of the fixed base 11 so that the lower surfaces of the wire support portions 19b, 19b formed on the left and right of the base 19 are at the same height and parallel to the upper surface 11a of the fixed base 11. Adjustment screws 20, 20
Is simply brought into contact with the lower surfaces of the wire support portions 19b, 19b, the suspension base 19 is
The wire support portions 19b, 19b are kept at the same height on the left and right without the equal leg portions 19a2, 19a2 of 9a being tilted around the X axis. A virtual intersection point P, which is obtained by virtually extending the isosceles 19a2 and 19a2 of the isosceles trapezoid 19a formed on the suspension base 19 and intersecting the same, is an objective lens based on the upper surface 11a of the fixed base 11. The height is substantially equal to the height of the lens center O of the fourteenth lens.

On the other hand, as shown in FIG. 2B, wire support portions 19 formed on the left and right of the suspension base 19 are provided.
b, the lower surface of one of the wire support portions 19b is
If the upper end of one of the adjustment screws 20 is pushed up, the equal legs 19a2 and 19a2 of the equal leg trapezoidal portion 19a are flexible around the X axis, so that the objective lens 14 is integrated with the lens holder 15 with respect to the optical disk. The axis tilt can be adjusted. A virtual intersection point P, which is obtained by virtually extending the isosceles 19a2 and 19a2 of the isosceles trapezoid 19a formed on the suspension base 19 and intersecting the same, is an objective lens based on the upper surface 11a of the fixed base 11. Since the height of the objective lens 14 is substantially coincident with the height position of the lens center O, the objective lens 14 is
Can be accurately and reliably tilted around the X axis. At this time, if the upper end of the other adjustment screw 20 is simply brought into contact with the lower surface of the other wire support 19b, the suspension base 19 can be prevented from tilting in the opposite direction to the adjusted tilt.

The operation of controlling the objective lens 14 in the focus direction and the tracking direction of the optical disk is substantially the same as that in the conventional art, and therefore, the description in this embodiment is omitted. In the embodiment, when the objective lens 14 is controlled in the focus direction and the tracking direction of the optical disc, the focusing coil 16 and the pair of tracking coils 17 are used in the embodiment.
17 is attached to the lens holder 15 to form a moving coil type.
There is also a method of attaching to a moving magnet type.

[0037]

According to the optical pickup device of the present invention described in detail above, in particular, one end side of the plurality of suspension wires is supported by the lens holder to which the objective lens is attached, and the other end of the plurality of suspension wires is provided. Side is supported by a wire support portion formed on the left and right in the width direction of the suspension base mounted on the fixed base, and the objective lens is swung in the focus direction and tracking direction of the optical disc through the plurality of suspension wires integrally with the lens holder. In the optical pickup device configured to be movable, when a line connecting a lens center of the objective lens and a central portion in the width direction of the suspension base is set as the X axis, the suspension base is made of a resin material in the width direction. Form a trapezoidal part with a hollow inside at the center part, Is fixed to the fixed base at right angles to the X-axis, and the isosceles of the isosceles trapezoid are made flexible. When the lower surface of one of the left and right wire support portions is pushed up, the equal leg portion is flexed around the X axis, and the objective lens is integrated with the lens holder with respect to the optical disc. As a result, the X-axis tilt adjustment (radial tilt adjustment) is made possible, so that the structure of the X-axis tilt adjustment mechanism becomes simpler than before, and the cost of parts of the optical pickup device can be reduced. Also, since the isosceles of the isosceles trapezoid formed on the suspension base are virtually extended and joined to make the virtual intersection substantially coincide with the height of the lens center of the objective lens, the objective lens is positioned at the center of the lens. The optical pickup device can be reliably tilted around the X axis with respect to the center, and the quality and reliability of the optical pickup device can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an optical pickup device according to the present invention.

FIG. 2 is a diagram schematically showing an X-axis tilt mechanism in the optical pickup device according to the present invention.

FIG. 3 is an exploded perspective view showing a conventional optical pickup device in an exploded manner for explaining the optical pickup device.

FIG. 4 is a perspective view showing an assembled state of a conventional optical pickup device.

FIG. 5 is a diagram schematically showing an X-axis tilt mechanism in a conventional optical pickup device.

[Explanation of symbols]

10 optical pickup device 11 fixed base 1
3 movable part, 14 objective lens, 15 lens holder,
18 ... Suspension wire, 19 ... Suspension base, 19a ... Equal leg trapezoid, 19a1 ... Bottom side, 19a
2 ... Equal legs, 19a3 ... Upper side, 19b ... Wire support, 20 ... Adjustment screw, O ... Lens center of objective lens, P
... A virtual intersection where the equal legs 19a2 and 19a2 are virtually extended and joined.

Claims (2)

[Claims] 1. A method of supporting one end of a plurality of suspension wires on a lens holder to which an objective lens is attached, and
The other ends of the plurality of suspension wires are supported by wire support portions formed on the left and right in the width direction of the suspension base mounted on a fixed base, and the objective lens is integrated with the lens holder through the plurality of suspension wires. An optical pickup device configured to be swingable in a focus direction and a tracking direction of an optical disc, wherein when a line connecting a lens center of the objective lens and a width direction center portion of the suspension base is set as an X axis, The suspension base is formed of an isosceles trapezoidal part with a hollow inside at the center in the width direction using a resin material capable of elastic displacement, and the bottom side of the isosceles trapezoid is orthogonal to the X axis on the fixed base. And is fixed, and the isosceles part of the isosceles trapezoid is made flexible, and is attached to the upper side of the isosceles trapezoid. The left and right wire supporting portions are connected to form the wire support portion, and when the lower surface of one of the left and right wire support portions is pushed up, the equal leg portion is flexible around the X axis,
An optical pickup device, wherein the objective lens is integrally formed with the lens holder so that X-axis tilt adjustment (radial tilt adjustment) can be performed on the optical disk. 2. The optical pickup device according to claim 1, wherein a virtual intersection point obtained by virtually extending and joining the equal legs of the equal leg trapezoid formed on the suspension base is provided as the objective lens. An optical pickup device substantially coincident with the lens center height position.