JPS61137234A - Tracking actuator of optical information device - Google Patents

Abstract

PURPOSE:To reduce the number of parts, to attain working without high working accuracy and to attain also the adjustment of parts by setting an adjusting mechanism for adjusting the stopping position of a mirror in its rotating direction on a mirror supporting part and rotating a part of parts of a tracking actuator to adjust the rotation of the mirror. CONSTITUTION:When a tool 16 is rotated, the other end part 16-2 of the tool 16 is pressed against any one end surface of a notch and a plate spring 15-6 can be rotted around the turning axis n-n of a body 15-8. If the plate spring 15-6 is rotated to adjust it, respectively pressing forces of holding springs 15-6-6, 15-6-7 to the upper surface 15-24 of a mirror holder 15-2 are also changed and the mirror holder 15-2 is stopped on the newly balanced position of the pressing forces. After setting up the mirror on a required stopping position by adjusting the rotation of the plate spring 15-6, a pin 15-7 having a pair of flanges is tightly pressed against the body 15-8 so that the side 15-6-2 of the plate spring 15-6 is fixed between the body 15-8 and respective flanges under press contact status.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to optical devices such as digital video discs.

Used in information recording and reproducing devices or optical information reproducing devices.

Especially regarding tracking actuators.

Travki, the laser beam by the rotation of the mirror.

A type of optical information device that is displaced in the angular direction.

Regarding tracking actuators.

[Background of the invention]

In the video disc around the optical player, the optical axis song.

Along with Gero, the rotatable 1 Galber mirror for Tora 9 King has an important role. A tracking actuator equipped with a conventional mirror was developed in Japanese Patent Application Laid-Open No. 1973-
As described in No. 161906, a coil is wound around the outer periphery of a movable part on which a mirror is mounted, and this movable part is rotatably supported by a fixed part via a support rod. The movable part is located in the magnetic field that exists in the fixed part, and by energizing the coil, it resists the force of the torsion spring of the support rod.

The mirror was rotated along with the coil. death.

Therefore, when the coil is de-energized, the mirror times.

The stopping position in the moving direction depends on the torsion spring characteristics of the support rod.

This is a specific direction that can be determined by in spite of.

of the mirror when assembling the tracking actuator.

There is nothing about the adjustment mechanism for the stop position in the rotating direction.

It wasn't disclosed. 1° On the other hand, according to the description in Utility Model Application Publication No. 57-35454, Mi.

The movable part mounted on the main body can be rotated to the fixed part.

It is supported via a rubber holder. like this.

Even in a configuration where the coil is de-energized, sometimes Mira.

- The stopping position is in a specific direction determined by the elastic properties of the rubber holder. Similarly, there is no description of a mechanism for adjusting the stop position of the mirror in the rotating direction.

The configuration of a conventional tracking actuator is shown in FIGS. 10 and 12. In the picture! 0, 5.

The optical head section 1 is a light emitting section 2. Light receiving sections 3 and 4.・Tracking actuator 5. Focusa.

Kuchiunitaro, optical section 7 to interposed in the middle.

14 and the casing 1-1 to which these are attached.

It is structured as follows. Reference numeral 20 denotes an optical disk that rotates at high speed and is provided opposite to the optical head section 1.

This optical disc 20 has a pre-group 20-1.

has been completed. of the focus actuator 6.

The objective lens 6-1 is the laser beam from the light emitting unit 2.

The beam is irradiated with a focus of 1° while following the pre-group 20-1, and information is recorded on the pre-group 20-1.

record or reproduce recorded information.

ing.

A laser beam emitted from a light emitting unit 2 such as a laser diode is converted into parallel light having a circular beam cross section by an optical component 7.8 such as a collimator, and enters the tracking actuator 5. Here, the laser beam is bent by 90 degrees and enters the objective lens 6-1 of the focus actuator 6, and always follows the predetermined recording tractor of the pre-group 2n-1.
4.

The position, focus, and control of the laser beam are performed by the tracking actuator 5 and the focus actuator unit so that the laser beam has a predetermined focusing diameter.

After reflecting off the optical disk 20, the beam returns to the original optical path and reaches the optical component 9.

14 and transmits a tracking error signal such as a differential type.

Detection light receiving element 3 and orcus error signal detection.

The light enters the light-receiving element 4. Also, the optical head section 1 is as follows.

In the direction perpendicular to the disk 20 (X direction).

It is movable within a predetermined range at a predetermined speed of 1° by a drive device not shown. Figure 11 is the same as Figure 10.

racking actuator 5 and focuser.

This is a perspective view of the cutter 6 seen from the direction of arrow A.

be.

The laser beam enters the mirror 5-1 on the tracking 1° actuator 5 from the 1-1 direction, and the laser beam enters the mirror 5-1 on the tracking 1° actuator 5.
1 and enters the objective lens 6-1 of the focus actuator 6 along the optical axis m-m of the objective lens 6-1. Information is recorded or reproduced while the optical disc 20 is rotating, but the tiger 9 (i.e., pre-group 2O-1) on the optical disc 20 may be displaced by a maximum of about 0.5txs due to eccentricity of the optical disc 20, etc. Occur. On the other hand, the laser beam is about 01 for this track 20-1.
- Tracking tracking accuracy of μm is required.

Mirror 5-1 according to the displacement of the tiger tuff.

Rotate and aim the laser beam towards Tora 9 King.

Transfer incidence and sufficient reaction speed within the desired accuracy.

It is followed by As shown in FIG. 12, the tiger 9° king actuator 5 moves the mirror 5-1. Koi,.

5-2. Magnet 5-3. Yoke 5-41 elastic support portion 5-5. Pin 5-6. It is composed of a casing 5°-9.

Here, the objective is measured with the coil 5-2 in a non-energized state.

from the optical axis m-m of the lens 6-1 and the mirror 5-1.

If the reflected laser beam rays do not match,
When starting up the optical information recording/reproducing apparatus, first, the mirror 5-1 is rotated greatly to align the optical axis mm with the light beam. At the same time, it is necessary to move the objective lens 6-1 in the direction of its optical axis and draw it into a funercus servo (not shown). The focus servo is configured to always focus the laser beam through the objective lens 6-1 onto the optical disk 20 at a predetermined radius, for example, about 1 μm. However, even if the 1c coil 5-2 is energized at startup and the mirror 5-1 is rotated to align the optical axis m-m of the lens with the reflected light beam of the laser beam, the device normally remains in this state. Focus-like.

state and whether these match the device.

It's difficult to judge whether to use it or not, and it takes time to pull it into the focus and zero servo at startup.

It was on. Carp to avoid things like this.

objective lens 6-1 even when power is not supplied to lens 5-2.

The optical axis m-m and the reflected light beam of the mirror 5-1 are aligned.

It is desirable to keep them at the same level, and adjustments are made during assembly to match them with an accuracy of ±0.1 degree.

Conventionally, such an adjustment method was performed as follows. The elastic support portion 5-5 is made of a rubber material or a resin material, and as shown in FIG. 11, the traversing actuator 5 is an L-shaped plate.

50 vertical plate portions 5rl-IK are attached. Vertical plate part・
A hole 50-2 is formed in 50-1, and this hole 5
050-2 (7 Love King Actiator 5 Pin 5
-6 is inserted. Also, the incidence of the laser beam/ray 1-
1 and the optical axis m-m of the objective lens 6-1, and 5 is the mirror 5-1.
They begin to intersect on the surface.

ing. The vertical plate surface 5-8 of the casing 5-9 is brought into contact with the vertical plate portion 50-1 of the L-shaped plate 50.

In this state, a tiger 9 king act centered on pin 5-6.

Adjust the rotation of the entire evaporator 5 to remove the person from the 1-1 direction.

The emitted laser beam was reflected by the mirror 5-1, and the reflected light substantially coincided with the optical axis m-m of the objective lens.

State f The traving actuator 5 is in a predetermined state.

It is bonded and fixed to the L-shaped plate 50 using the method, and the optical axes are aligned.

I was assembling the parts. This is the carp mentioned above, 5ru5
The stop position of the mirror 5-10 in the rotating direction when the mirror 5-1 is not energized is determined by the elastic properties of the elastic support part 5-5, but since there is no means for adjusting the stop position of the mirror 5-1 itself, the By rotating the entire part 5, the optical axis m-.8.m is made to coincide with the light beam of the reflected laser beam.

In this way, conventional devices had a structure in which the entire moving actuator 5 was rotated.
L-shaped holder 50. Tora 9 Kinga.

Kucheeta 5. A pin for determining and adjusting the dimensional accuracy of the focus actuator 6°.

5-6 is inserted into the hole 50-2 with high precision.

I needed to finish it. A 1° vertical plate portion 50 parallel to a plane containing two optical axes lt and mm
It was also necessary to provide -1 with high precision. .

Therefore, the travking actuator 51. Both the focus actuator 6 and the L-shaped holder 50° require high-precision parts.

The cost was extremely high, which was the main reason for a significant increase in the price of the optical helidene section 1. Further, a great deal of labor is required for adjustment during assembly, which also increases the price.

[Purpose of the invention]

The present invention was made in view of the above problems, and its purpose is to adjust the stop position of the mirror by rotating the minimum number of parts around the mirror, and to use an easy adjustment structure to adjust the stop position of the mirror.
Two optical axes can be aligned.

Tracking actuator of optical information device.

The aim is to provide Yueta.

[Summary of the invention]

Tracking actuator mirror support.

First, adjust the stop position of the mirror in the rotating direction.

An adjustment mechanism is installed for the mirror to meet the specified accuracy.

Two tracking actuators for rotation adjustment.

This was done by rotating the parts of the section. therefore.

Conventionally, the entire tracking actuator rotates.

This eliminates the L-shape, which was necessary due to the conventional design, and makes it possible to directly connect and fix the tracking actuator to the focus actuator. In this way, the number of parts can be reduced, and adjustments can be made without requiring high processing precision, so processing costs and assembly costs can be significantly reduced.

[Embodiments of the invention]

Examples of the present invention will be described below based on the drawings.

do.

1 to 4 show a first embodiment of the present invention.

It is a figure showing a Tora 9 King actuator.

15 is a substantially prism-shaped body 15-8;
Can be rotated to the 5-8 slope 15-8-4 side.

Mirror holder 15-2 supported by , and this Mi.

Coil 15°- wound around the outer circumference of the roller holder 15-2
5 and is fixed to the lower surface of the mirror holder 15-2.

The mirror 15-1 and mirror holder 15-2 are made elastic! ,
1 supporting leaf spring 15-6, and this leaf spring 15-6.

A pair of flanged pins that are crimped onto the body 15-8.

15-7 and 15-7. here.

and mirror holder 15-2. Miller 15-1 and carp.

Mirror holder assembly 15-1-
It is called 1. A pair of Magne-V) 15 4 and 15-4 are provided at both ends of the slope 15-8-4,
A pair of gaps 15-4-1 and 15-4-1 are formed into which the outer peripheral portion of the mirror holder 15-2 including the coil 15-5 is loosely inserted. This void 15-4.11.

-1, 15-4-1 and magnet9 15-4. .

A pair of yokes 15-5゜1 are located opposite to 15-4.
5-5 is provided. One magnet 15°-4
is, for example, the north pole, and the other magneto-V)15°-4 is the south pole, and these north poles, one yaw.

15-5. The other yoke 15-5, S pole and bow.

D15-8 constitutes a magnetic closed circuit. slope.

A pair of side parts 15-8°- sandwiching 15-8-4 from both sides
2 has through holes 15-8-1 and 15-8-1, respectively.

are formed on the same straight line. A pair of flanged pins 15-7 rotatably support the mirror holder assembly 15-1-1 on the body 15-8. Each of the 7 flange pins 15-7 has a small cylindrical portion 15 at the tip.
-7-1. The middle part is composed of a middle cylinder part 15-7-2 and the base end part is a large-diameter flange part 15-7-3, which are coaxial.

The mirror holder 15-2 has a pair of protrusions 15-2-6 at the center of both ends of its lower surface 15-2-1 (only one of which is shown in FIG. 1), and these protrusions 15-2- 6
A cylindrical hole 15-2-2 is formed at an angle of 12 degrees. In addition, the mirror holder 15-2 is provided with a pair of elongated holes 15-2-5 at both ends, and the coil 15-5 is connected to the coil 15-5 by a trunking error/difference detection circuit (not shown) in a predetermined manner. So that you will be notified w1.

It has become.

Between a pair of side parts 15-8-2 and 15-8-2.

Loosen the protrusion 15-2-6 of the mirror holder 15-2.

After polishing, the middle cylinder part of pin 15-7 with 7 flange 15°-
7-2 to through hole 15-8-1, respectively, with high precision.

The small cylindrical portion 15-, while being inserted with a fitting tolerance.

7-1 and cylindrical hole 15-2-2 with appropriate play.

Assemble the mirror holder by inserting it with the fitting tolerance.

The solid body 15-1-1 is mounted on the body 15-8. death.

Therefore, the mirror holder 15-2 is a pin with a flange.

The small cylindrical portion 15-7-1 is rotatably supported by a body 15-8 by 1 degree around the center 15-7, and the small cylindrical portion 15-7-1 is made of a resin made of frill yarn to reduce the frictional resistance of this rotation. In this state, each yoke 15-5 is loosely inserted into the elongated hole 15-2-1. Next, the leaf spring 15-6 that elastically supports the mirror holder 15-2 in the rotational direction will be explained. The leaf spring 15-6 has a central plane part 15-6-1, and a pair of holding springs 15-6- that protrude from both sides of the plane part 15-6-1 so as to be bent downward in the figure. 6, 15-6-
7, and a pair of side surfaces 15-6-4 that protrude from both ends of the plane portion 15-6-1 at right angles downward in the drawing in parallel to each other.
.

15-6-5. These both sides.

A hole 15- is provided in the center of surfaces 15-6-4 and 15-6-5.
96-4 and 15-6-5 are formed respectively.

The inner diameter of these is smaller than the inner diameter of the through hole 15-8-1.

Slightly large. Assemble the leaf spring 15-6 to the body 15-8.

To set it up, first attach the mirror holder assembly 15-1-01 to the body 15-8, then attach the retaining springs 15-6-6 and 15-6-7 of the leaf spring 15-j to the mirror holder.

While lightly pressing against the upper surface of the router 15-2, the both sides 15-6-2 and 15-6-5 of the
-8-2 is brought into contact with the entire surface from the outside. Finally, each 7
The middle cylindrical part 15-7-2 of the flange pin 15-7 is inserted into the hole 15-7.
-6-4, 15-6-5 and each through hole 15-8-1 respectively, and connect both sides 15-6-2 and 15-6-5 to each side part 15-8-2 and 7 rank part. - Crimp and fix the clamping plate spring 15-6 between 15-7-5. FIG. 2 shows the mirror assembly 15-1-1 and the leaf spring 15-6 assembled to the body 15-8 using the flanged pin 15-7.

A mounting portion 15-8+ is provided on the lower surface of the body 15-8 in the figure.

10 is fixed to this mounting portion 15-8-10.

The laser beam reflected from the mirror 15-1 passes through.

A hole (not shown) is formed for this purpose. Same.

on the other side of the body 15-8 (mounting parts 15-8-10 and l)
15-8-9 has a laser beam.

A hole (not shown) for incidence is formed. .

Here, the mirror holder 15-2 is attached to the coil 15-5.

When energized, the pair of retaining springs 15°-
6-6 and 15-6-7 make flanged pin 15°-7
are elastically pressed in opposite directions around the axis of the mirror holder 15-2, and the rotational position where the pressing forces acting on the upper surface 15-2-4 of the mirror holder 15-2 are balanced, for example.

For example, it is stopped at θ0 with respect to the slope 15-8-4.

Now, when the coil 15-5 is energized in a predetermined manner, Ma, 15
.

Mirror Holder 1 due to interaction with Gnevt 15-4
5-2 is a retaining spring 15-6-6i15-6- that breaks the balance and rotates in any direction, and when the energization is stopped.
The balance position of 7 returns to the original 00. It cannot be expected that this stopping position θ0 is necessarily the desired position.

Therefore, as shown in Fig. 2, the leaf spring 15-6 is set using the axis of the flanged pin 15°-7 as a rule.

By rotating the car around the n-line, the mi.

Machine R for finely adjusting the stopping position of the roller holder 15-2.

has been established. The mechanism with the following will be explained.

In FIGS. 5 and 4, the - of the leaf spring 15-6.

A trapezoidal cut is made in the center of the tip of the side surface 15-6-2.

A notch 15-6-8 is formed, and a notch 15-6-8. -1
A long groove 15-8-5 is formed at a position opposite to and where the end portions overlap.

In FIG. 5, the rotation axis W of the mirror holder 15-2 is shown for explanation.
-n is shown as the intersection of straight lines α-α and h-b.

・　16　・ The notch 15-6-8 and the long groove 15-8-5 overlap.

A jig 16 having a rectangular cross section, such as a θ driver, is inserted into the hole to be made. At the lower end of the long groove 15-8-5 of this jig 16, and at the other end 16 of the jig 16,
-2Q notches 15-6-8 are respectively engaged.

Rotate this jig 16 in the direction a in FIG. 4.

Accordingly, one end face of the notch 15-6-8.

The other end 16-2 of the jig 16 presses the plate spring 15-0.
6? Around the rotation axis n-n with respect to the body 15-8.

It can be rotated. This rotation axis n-n, .

is the same as the axis of the flanged pin 15-7.

Due to the rotation of the leaf spring 15-6, the holding spring 15-16
The equilibrium position of -6 and 15-6-7 also changes.

Accordingly, the mirror holder 15-2 also has a small cylindrical portion 15-7-.

Rotates around 1. As shown in FIG. 5, the flat portion 15-6- is arranged so that even if the leaf spring 15-6 is rotated several degrees with respect to the slope 15-8-4 of the body 15-6, they do not interfere with each other. The lengths of the side surfaces 15-6-2 and 15-6-5 are preformed so that the side surfaces 15-6-2 and 15-6-5 are spaced apart from the slope 15-8-4 by δ.

As explained above, when the leaf spring 15-6 is rotated for adjustment, the holding springs 15-6-6 and 15-6-7
The respective pressing forces on the upper surfaces 15- and 2-4 of the mirror holder 15-2 are also approved, and a new pressing force is applied.

The mirror holder 15-2 stops at the balance position θ1. - At this time, the rotational adjustment amount Δθ2 of the leaf spring 15-6 and this.

The stopping position of the mirror holder 15-2 is determined by the adjustment.

The displacement amount Δθ5 has the same value.

In the tracking actuator 15 of the present invention, the stopping position of the mirror 15-61 is within an error of a few degrees from the desired position on average when the above-mentioned parts are assembled.

Become. At this time, each side surface portion 15-8-2 and the flan.

15-6-2 and 15-7-1.

and 15-6-5 are in a lightly pressed state. As described above, the stopping position of the mirror 15-1 is adjusted together with the mirror holder 15-2, but the desired position of the mirror 15-1 can be confirmed by entering the laser beam into the mirror 15-1 from the direction 1-1 and m-m. This is done during assembly by detecting the reflected light in the direction.

After setting the mirror 15-1 to the desired stopping position by adjusting the rotation of the leaf spring 15-6, the pair of flanges and bolted pins 1
Press 5-7 strongly against body 15-8, and press body 15-
8 and each flange 15-7-5・Plate spring 15-6
side surfaces 15-6-2 and 15-6-5 are firmly fixed in a pressed state. Furthermore, these pressures.

Drop adhesive onto the connecting parts to further secure the joint.

It can be made stronger.

FIG. 5 is a diagram showing a second embodiment of the present invention.

The same parts as those in the first embodiment are given the same numbers, and their explanation will be omitted. In this example, the first implementation.

The example leaf spring is made into a leaf spring 20 structure as shown in the figure.

This plate spring 20 has mirror holders 15-2 at both upper ends of the side surfaces 15-6-2 and 15°-6-5.

Holding springs 20-1 and 20-5 pressed from above, respectively.
1 and 20-2.20-4 are formed. Side 1
5-6-2 and side surface 15-6-5 are flat part 2O-6-I
It is integrally molded from K.

FIG. 6 is a diagram showing a fifth embodiment. In this embodiment, the flat part of the leaf spring of the second embodiment is removed, and two individual leaf springs 50 and 51 are created, and they are
Holding spring 50-1. ．． Ro0-2 and 51-1, 51-2
It is forming. In this case, remove these retaining springs.
It may be brought into contact with either the lower surface 15-2-1 or the upper surface 15-24 of the roller holder 15-2. -Figure 7 shows the leaf spring with flanged pin 15-7.

It is a figure which shows the modification of the mechanism which rotates and adjusts instead.

This deformation mechanism is the same as the first one above. 2nd and 5th.

Although it can be applied to any of the embodiments, the first embodiment is shown in the figure.

This shows a case where it is applied to the embodiment. In the 1° view, the notch 15-6-J of the leaf spring 15-6 and the long groove 1.5-8-5 of the body 15-8 are both shaped.

to the side part 15-8-2 of the body 15-8.

Two long grooves 15-8-5 and 15-8-6 are formed.

There is. In a part of each long groove 15-8-5 and 15-8-6.

The lower end surfaces 15-6-10 and 15-6-11 of the side surface 15-6=2 of the leaf spring 15-6 overlap, respectively. An e-driver-like jig is engaged between the end surface 15-6-10 and the long groove 15-8-5, and the jig is rotated counterclockwise to remove the plate 1. .

, 20° 15-6 in the α1 (clockwise) direction, and the end face 15-6-11
By engaging and rotating the jig between the long groove 15-8-6 and the long groove 15-8-6, the α2 (counterclockwise) rotational adjustment can be performed.

In the present invention, the rotational adjustment of the mirror 15-1 rotates the entire tracing actuator 415.

Since it is not necessary to use the Mukuro tracking actuator.

15 is directly coupled to the focus actuator 6.

It becomes possible to do so.

FIG. 8 is a modification of the first embodiment, and the tracking actuator 15 shown in FIG. 7 is focused.

Shows a diagram that is directly connected to the end.

Ru. As shown in FIG. 9, the focus actuator.

A cylindrical hole 6-5 is formed in the lower surface 6-2 of the eater 6.

On the other hand, a cylindrical protrusion (not shown) is provided at the center of the 1° mounting portion 15-8-1n of the traving actuator 15, and the protrusion is fitted into the hole 6-5 for direct connection. An axial through hole through which the laser beam passes is also formed inside the protrusion.

It is assumed that this has been completed.

In this state, the optical axis 1-1 of the laser beam incident on the Tiger J King actuator 15 and the objective lens.

The intersection with the optical axis m-m of the lens is mounted as described above.

so as to match the reflective surface of mirror 15-1.

is formed. Further, the center of rotation n - n of the mirror holder 15-2 is also on the reflective surface of the mirror 15-1.

Therefore, the optical axis t-1-,m.

-m and the axis I are at one point on the mirror 15-1.

intersect.

Based on such a configuration, a laser beam 11 and emitted from the direction 1-1 is reflected by the mirror 15-1, and the plate spring 1
Rotate 5-6 around axis W-n.

By doing so, the optical axis of the reflected light is aligned with the objective lens.

Stop position of the mirror so that it coincides with the optical axis m-m.

Adjust the position. 1゜〔
Effects of the Invention] As explained above, according to the present invention, the number of parts of the tracking actuator can be reduced. Also, there is no need for particularly high-precision parts machining or assembly. Therefore, processing costs and assembly costs can be reduced.

In addition, if the tracking actuator of the present invention is manufactured using conventional production facilities with equivalent processing accuracy (assembly accuracy), the accuracy of the mirror adjustment stop position can be set with higher precision than with the conventional structure. Also, it is possible to stabilize the performance and performance of the tracking actuator with higher accuracy.

Ivy.

[Brief explanation of drawings]

FIG. 1 shows tracking 1 of the optical information device of the present invention. . FIG. 3 is an exploded perspective view of the first embodiment of the actuator. Figure 2 is a perspective view of the assembled parts of Figure 1; Figure 5 is a view from arrow B in Figure 2, and Figure 4 is the main point of Figure 5. This is an enlarged view of the section. FIG. 5 is an exploded perspective view of the second embodiment, and FIG. 6 is an exploded perspective view of the fifth embodiment. FIG. 7 is a perspective view of a modification of FIG. 5, which is the first embodiment, FIG. 8 is a perspective view of the tracking actuator of the present invention attached to a focus actuator, and FIG. 9 is a focus actuator, FIG. 2 is a perspective view of a 25° chaeta. FIG. 10 is a partially cutaway perspective view of the main parts of a conventional optical information recording/reproducing device, and FIG. 11 shows a conventional Travkin actuator as a Funakas actuator. FIG. 12 is a perspective view of a conventional tiger-locking actuator in a state in which it is attached. 6... Focus actuator 6-1... Objective lens 6-2... Lower surface portion 6-5... Hole 1°15... Tracking actuator 15-1...
Mirror 15-2...Mirror holder t5-2-2...Cylindrical hole 15-2-4...Top surface 15-5...Coil 15-4...Magnet 15-5...Yoke 15 -6, 20, 50, filter 1...plate spring 15-
6-2, 15-6-5... Side, 24° 15-6-4, 15-6-5... Hole 15-6-6
, 15-6-7, 20-1 to 20-4.
・To 50-1 2. To 51-1 2... Holding spring 15
-6-8...notch 15-6-10, 15-6-11...end face 15-7
...Flanged pin 15-7-1...Small cylindrical part 15-7-2...Central cylinder part 15-7-5...Flange 15-8...Body 1
．． . 15-8-1...Through hole 15-8-2...Side part 15-8-5...Long groove 15-8-5, 15-8-6...Long groove 15-8-1
0...Mounting part.

Claims (1)

[Claims] 1. A tracking actuator that makes a laser beam enter a focus actuator, including a body having a surface provided with a magnet and a yoke, and both side surfaces sandwiching this surface, and a body that reflects the incident laser beam to the focus actuator. A mirror, a mirror holder on which the mirror is mounted and a coil is wound around it, a flanged pin that rotatably supports the mirror holder on the body through a small cylindrical part, and a spring that holds the mirror holder on the body and elastically supports the mirror holder. a flange of the flanged pin that fixes the side surface of the leaf spring to the side surface of the body; and a flange of the flanged pin that fixes the side surface of the leaf spring to the side surface of the body; A tracking actuator for an optical information device, which is provided with a rotation adjustment mechanism for rotationally adjusting a spring, so that a rotation stop position of the mirror can be adjusted. 2. The flanged pin is made up of a small cylindrical part with a small diameter, a medium cylindrical part with a medium diameter, and a large diameter flange in order from the tip, and the small cylindrical parts of the pair of flanged pins are formed in the mirror holder. The tracking actuator is rotatably inserted into each of the cylindrical holes, and the middle cylindrical portion thereof is press-fitted into a through hole formed on both sides of the body and a hole formed on both sides of the leaf spring, so that the tracking actuator is attached when assembled. A tracking actuator for an optical information device according to claim 1, wherein the axes of the pair of flanged pins are on the same straight line. 3. The rotation adjustment mechanism is characterized by comprising a notch formed in the side surface of the leaf spring, and a long groove formed in the side surface of the body so as to partially overlap and face the notch. A tracking actuator for an optical information device according to claim 1. 4. The rotation adjustment mechanism is characterized by being constituted by a pair of long grooves formed in the side surfaces of the body so as to partially overlap and face two end surfaces of the side surfaces of the leaf spring. A tracking actuator for an optical information device according to claim 1.