JPH07230627A - Biaxial actuator and its production - Google Patents

Abstract

PURPOSE:To contrive to decrease the number of parts, to facilitate assembly and to improve reliability of a biaxial actuator and a process for producing such actuator. CONSTITUTION:This biaxial actuator has a lens holder 12 including an objective lens 11 and a coil bobbin 13 and two pairs of suspensions 14 which are fixed at one end above and below both sides of this end holder and fixed at the other end to a fixing part. The biaxial actuator 10 is so constituted that the lens holder 12 described above is formed by dividing the holder to an upper part 12a and lower part 12b and integrally providing these parts in the divided state respectively with the suspensions 14, then joining the upper 12a and the lower part 12b to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biaxial actuator for an optical pickup used for recording / reproducing signals on / from an information recording medium.

[0002]

2. Description of the Related Art Conventionally, such a biaxial actuator for an optical pickup has been used for recording and reproducing a signal of a disc-shaped information recording medium such as an optical disc. Then, this actuator can move the objective lens provided on the support member in two directions of the focusing direction and the tracking direction.

Such a biaxial actuator is constructed, for example, as shown in FIG. In the figure, a biaxial actuator 1 has a lens holder 2 having an objective lens 2a and a coil bobbin 3 attached to the lens holder 2 by adhesion or the like.

The lens holder 2 is fixed to the fixed portion 4 by means of suspensions 5 each having one end on both sides of the lens holder 2 and the other end fixed to the fixed portion 4, for example, two pairs of upper and lower leaf springs. On the other hand, it is movably supported in two directions perpendicular to each other, that is, a tracking direction indicated by the reference symbol Trk and a focusing direction indicated by the reference symbol Fcs.

Further, the coil bobbin 3 is wound with a focusing coil and a tracking coil. The ends 6a and 6b of the yoke 6 attached to the fixed portion 4 face each coil, and the magnet 7 is attached to the inner surface of the end 6a of the yoke 6 on the fixed portion side. There is.

According to the biaxial actuator 1 thus constructed, the coil bobbin 3 is moved to the drawing Trk, F by supplying a driving voltage to each coil from the outside.
It is moved with respect to the cs direction. Thus, the objective lens 2a attached to the lens holder 2 is appropriately moved in the focusing direction and the tracking direction.

[0007]

However, in the biaxial actuator 1 having such a structure, it is necessary to fix each suspension 5 to the lens holder 2. Therefore, there are problems that the number of parts is increased, the assembly process is complicated, and the cost is increased.

Further, in order to attach the suspension 5 to the lens holder 2, means such as adhesion and soldering are used. Therefore, there is a problem in reliability such that the suspension 5 comes off when an external force is carelessly applied to the mounting position of the suspension 5 on the lens holder 2.

In view of the above points, the present invention has a simple structure, a small number of parts, easy assembly, and improved reliability, and a biaxial actuator and manufacturing thereof. It is intended to provide a way.

[0010]

According to the present invention, the above object is to provide a lens holder including an objective lens and a coil bobbin, and a plurality of pairs of one end fixed to the lens holder and the other end fixed to a fixing portion. In a biaxial actuator including an elastic support, the lens holder is molded so as to integrally include the elastic support in a state of being divided into an upper part and a lower part, and the upper part and the lower part are joined to each other. This is achieved by a biaxial actuator which is formed by

Further, at least one of the plurality of elastic supports may have a damping material applied to the inner surfaces of the elastic supports facing each other.

The upper and lower parts of the lens holder may be integrally molded with the elastic support by outsert molding.

Further, the upper and lower parts of the lens holder may be integrally molded with the elastic support by insert molding.

The upper and lower parts of the lens holder may be bonded to each other by adhesion.

Further, the upper and lower parts of the lens holder may be joined to each other by ultrasonic welding.

Further, the above object is, in the present invention, a lens holder including an objective lens and a coil bobbin, and a plurality of pairs of elastic supports having one end fixed to the lens holder and the other end fixed to a fixing portion. In the method for manufacturing the biaxial actuator, the upper part of the lens holder is integrally molded with the first lead frame having the upper elastic support, and the second lead having the lower elastic support is provided. The lower part of the lens holder is integrally molded with the frame,
After that, the upper part of the lens holder and the lower part of the lens holder are joined to each other to achieve a method of manufacturing a biaxial actuator in which the lens holder is formed.

Before joining the upper part of the lens holder and the lower part of the lens holder to each other, the lower surface of the upper elastic support provided on the upper part of the lens holder and the lower elastic support provided on the lower part of the lens holder. You may make it apply a damping material to the upper surface of a support body, respectively.

Further, either the upper part or the lower part of the lens holder is cut off from the lead frame and joined to the other, and after the objective lens, the coil bobbin and the like are assembled, the other lead frame is cut off. By doing so, the lens holder may be formed.

[0019]

According to the above construction, the lens holder is divided into an upper portion and a lower portion, and is formed integrally with the suspension by outsert molding or insert molding. The upper portion and the lower portion are adhered to each other by ultrasonic welding. The lens holder can be assembled by being joined by the above.

Further, either the upper part or the lower part of the lens holder is cut off from the lead frame and joined to the other, and after the objective lens and the coil bobbin are assembled, the other lead frame is cut off. Thus, when a lens holder is formed, by forming a plurality of sets of elastic supports for each lead frame in advance, it is possible to form a plurality of elastic support members on top of a plurality of lens holders by a single molding process. The lower part is molded and the assembly can be done easily.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to FIGS. It should be noted that the examples described below are suitable specific examples of the present invention, and therefore, various technically preferable limitations are given, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

The focus position of the light beam emitted from the semiconductor laser and the spot position on the recording surface of the optical disc are adjusted on the recording medium such as the optical disc by adjusting the position in the optical axis direction of the objective lens and the direction orthogonal to the optical axis. The position is performed by finely adjusting this objective lens. An electromagnetically driven actuator is used to adjust the position of the objective lens. This actuator is called an objective lens actuator or a biaxial actuator,
It includes a bobbin to which an objective lens is attached, a plurality of elastic supports, and a driving unit that generates a driving force. The bobbin is supported by the plurality of elastic supporting portions with respect to the fixed portion such that the position in the optical axis direction of the objective lens, that is, the focus position and the position in the direction orthogonal to the optical axis of the objective lens, that is, the tracking position are adjustable. ing.

FIG. 1 shows an embodiment of a biaxial actuator according to the present invention. In the figure, the biaxial actuator 10 includes a lens holder 12, a coil bobbin 13, a plurality of elastic supports 14 a, 14 b, 14 c, 14 d, a base 15 and a mounting member 16. The lens holder 12 has an opening for mounting the coil bobbin 13 and a recess for mounting the objective lens 11. A hole through which a light beam emitted from the semiconductor laser or a return beam from the recording surface of the optical disk passes is formed on the bottom surface of this recess. The objective lens 12 is attached to the concave portion of the lens holder 12 by adhesion or the like. The lens holder 12 is supported by a plurality of elastic supports 14a, 14b, 14c, 14d so as to be movable in the focus direction Fcs and the tracking direction Trk.

The coil bobbin 13 has a base 1 which will be described later.
An opening for inserting the magnetic circuit 5 is formed, and a focus coil 13a and a plurality of tracking coils 13b, 13b are attached. The focus coil 13a is wound around the bobbin 13 along an axis parallel to the optical axis of the objective lens 11. The tracking coils 13b and 13b are formed by winding the coils in an elliptical or rectangular shape.
It is attached to one side of a. Coil bobbin 1
The upper surface of 3 is covered with a cover 24. The cover 24 may form a closed magnetic circuit together with a yoke portion described later. The coil bobbin 13 is attached to the opening formed in the lens holder 12 with the focus coil and the tracking coils 13b, 13b attached.

A plurality of elastic supports 14a, 14b, 14
Reference characters c and 14d denote suspensions formed of an elastic body such as a leaf spring, and are mounted between the lens holder 12 and the mounting member 16 so as to be parallel to each other by a method such as bonding or soldering. The base 15 has a mounting member 16
And a pair of opposed yoke portions 22 (22a, 22b) forming a magnetic circuit are formed. In a state where the lens holder 12 and the mounting member 16 are connected by the plurality of elastic supports 14, the protrusion 17
The attachment member 16 is attached to the substrate by a method such as adhesion.
At this time, the attachment member 16 is attached to the protrusion 17 so that the optical axis of the objective lens 11 does not tilt. A permanent magnet 23 is attached to the surface of the yoke portion 22 that faces the yoke 22b. A magnetic circuit is configured by the pair of yoke portions 22a and 22b and the permanent magnet 23.

With the mounting member 16 attached to the protrusion 17, the focus coil 13a and the tracking coils 13b and 13b attached to the coil bobbin 13 are provided in the gap between the permanent magnet 23 and the one yoke 22b.
Is inserted. At the same time, the other yoke 22 a and the permanent magnet 23 are inserted into the opening of the coil bobbin 13.

The actuator 10 thus constructed
In, the focus coil 13a and the tracking coils 13b and 13b are respectively supplied with currents based on the focus servo signal and the tracking servo signal. As a result, the DC magnetic field of the magnetic circuit and the alternating magnetic field generated from the focus coil 13a and the tracking coils 13b and 13b drive the lens holder 12, that is, the objective lens 11 in the focus direction Fcs and the tracking direction Trk.

The lens holder 12 is divided into an upper portion 12a and a lower portion 12b as shown in the figure. One end of one suspension 14 is attached to each of both sides of the upper portion 12a and the lower portion 12b. Further, the other end of the suspension 14 is fixedly held to the upper part 16a and the lower part 16b of the mounting member 16 which is similarly divided into upper and lower parts. As a result, the lens holder 12 has two directions perpendicular to the base portion 15, that is, a tracking direction indicated by reference numeral Trk,
It is movably supported in the focusing direction indicated by reference sign Fcs.

Here, the lens holder 12, the suspension 14 as an elastic support, and the mounting member 16 described above are used.
Are configured as shown in FIG. That is, the upper portion 12a of the lens holder 12 and the upper portion 16a of the suspension and the mounting member 16 are integrally formed as an upper assembly 17 by, for example, outsert molding or the like.

Similarly, the lower portion 12 of the lens holder 12 is
b, the lower portion 1ba of the suspension and the mounting member 16,
For example, the lower assembly 18 is integrally formed by outsert molding or the like. The upper assembly 17 and the lower assembly 18, which are integrally molded in this way, are joined to each other by adhesion, ultrasonic welding, or the like, so that the lens holder 12, the suspension 14, and the mounting member 1 are attached.
Assembly of 6 may be performed.

Preferably, in the actual manufacturing process,
As shown in FIG. 4, a plurality of sets of suspensions 14a and 14c forming the upper assembly 17 are formed on the first lead frame 19 by punching or the like in a state of being continuously arranged. Similarly, a plurality of sets of suspensions 14b and 14d forming the lower assembly 18 are formed on the second lead frame 20 by punching or the like in a state of being continuously arranged.

The lens holder 12 is attached to each of the lead frames 19 and 20 thus formed.
Upper part 12a and lower part 12b and upper part 1 of the mounting member 16
By molding 6a and lower part 16b, a plurality of upper assemblies 17 and a plurality of lower assemblies 18 are simultaneously molded. This can increase productivity.

The coil bobbin 13 has a focusing coil 13a and a tracking coil 13b.
Are respectively wound around the winding part. The ends of the windings of each coil are wound and fixed on four terminal pins provided so as to project to the fixing portion side of the coil bobbin 13.

Here, the terminal pin 21 is the coil bobbin 1
Two of them are arranged at the upper and lower end portions of 3, and the upper terminal pins 21a and 21b have a relatively wide spacing, and the lower terminal pins 21c and 21d have a relatively narrow spacing. Further, it is arranged so as to be located between the upper terminal pins 21a and 21b.

On the other hand, a part of the suspension 14 is passed through the lens holder 12 as shown in FIG. Inside the rear end of this lens holder 12, as shown in FIG.
The inner end of 4 is the terminal pins 21a, 2 of the coil bobbin.
It is exposed at a position where it can come into contact with 1b, 21c, and 21d to form a power supply terminal. And each coil 13
Both a and 13b have terminal pins 21c and 2 whose winding start is lower.
It is wound around any of 1d, and the winding end is wound around the upper terminal pins 21a and 21b.

In this case, winding start 13a-1, 13b-1 and winding end 13a-2, 13 of each coil 13a, 13b are performed.
b-2 is, as shown in FIG.
It may be connected to c, 21d and 21a, 21c in "parallel". Further, winding start 13a-1, 13b-1 and winding end 13a-2, 13b of each coil 13a, 13b.
-2 is, as shown in FIG. 7, terminal pins 21d,
21c and 21a, 21c may be connected "crossing".

Incidentally, the coils 13a in FIG. 6 and FIG.
The connection state of 13b is an example, and each coil 1
If the winding start and the winding end of 3a and 13b are divided into the upper and lower terminal pins, any connection may be made, but if the winding start is wound on the lower terminal pin, The center of gravity is located below the coil bobbin 13 and the lens holder 12, and the biaxial actuator 10
It is good in terms of weight balance.

Further, as shown in FIG. 2, the ends 22a and 22b of the yoke 22 attached to the fixed portion 15 face the coils 13a and 13b, and one end of the yoke 225 on the fixed portion side. A magnet 23 is attached to the inner surface of 22a. The coil bobbin 13 has an upper portion covered with a cover 24.

Biaxial actuator 10 according to the present embodiment
Is configured as described above. At the time of manufacturing, the lens holder 12 is attached to the suspension 14 of each set of the first lead frame 19 and the second lead frame 20.
Upper part 12a and lower part 12b and upper part 1 of the mounting member 16
By integrally molding 6a and the lower portion 16b by outsert molding, insert molding, or the like, a plurality of upper assemblies 17 and lower assemblies 18 are manufactured at the same time.

Then, for example, the second lead frame 20
By cutting off each of the subassemblies 18 to separate them. Each lower assembly 18 thus divided is bonded to each of the plurality of upper assemblies 17 connected by the first lead frame 19 by a method such as adhesion or ultrasonic welding. Thus, the plurality of lens holders 12 including the mounting member 16 and the suspension 14 connected by the first lead frame 19 are formed.

Here, the objective lens 11 and the coil bobbin 13 are attached to the plurality of lens holders 12 connected to each other by the first lead frame 19. At this time, in the coil bobbin 13, the lower terminal pins 21c and 21d of the terminal pins 21 are arranged closer to the center, and the upper terminal pins 21a and 21b.
Are disposed on both sides slightly apart, so that they can be smoothly inserted into the lens holder 12. On the other hand, the coil bobbin 13
The terminal pins 21a, 21b, 21c, 21d can easily contact the ends of the suspension 14 exposed in the lens holder 12, respectively. Therefore, the end portion of the suspension 14 is preferably provided as a power supply terminal at a position corresponding to the arrangement of the terminal pins 21a, 21b, 1c, 21d of the coil bobbin 13.

In the lens holder 12 having the objective lens 11 and the coil bobbin 13 mounted in this way, the winding start and the winding end of each coil 13a, 13b wound on the coil bobbin 13 are respectively upper and lower terminal pins 21a, 2
Since it is wound in 1b, 21c, and 21d separately,
By applying a voltage between the suspension 14 below each lens holder 12 and the first lead frame 19, a coil check such as a continuity test of the coils 13a and 13b and a measurement of a generated magnetic field can be performed on the production line. Can be done in.

Finally, by cutting off the first lead frame 19, the lens holders 12 are separated from each other and attached to the fixing portion 15, whereby the biaxial actuator 10 is completed.

When the biaxial actuator 10 is used in an optical pickup for a mini disc, as shown in FIG. 8, the mini disc 26 in the mini disc cartridge 25 is opened through the opening 25a in the lower face of the mini disc cartridge 25. On the other hand, the objective lens 11 of the biaxial actuator 10 is disposed so as to face it. At this time, the coil bobbin 1
Since the terminal pins 21a and 21b above the terminal 3 approach the opening 25a of the mini disk cartridge 25, the opening 25a of the terminal pins 21a and 21b.
In order to avoid contact with the terminal pins 21a, 21
b is not the start of double winding to prevent the coils 13a and 13b from fraying, but the coils 13a and 1b.
It is desirable that the winding end of 3b is wound. Thereby, the thickness L of the upper end portion of the coil bobbin 13 can be reduced, and it is possible to effectively prevent the interference with the opening 25a.

By the way, in the conventional biaxial actuator 1 shown in FIG. 12, the objective lens 11 mounted on the lens holder 12 is moved in the tracking direction or the focusing direction by the electromagnetic drive described above. There is. At this time, the suspension 5, which is the elastic support member, may vibrate based on its resonance frequency, and the behavior may be unstable. In order to dampen such vibrations, conventionally, a damping material has been applied as shown in FIG.

FIG. 9 shows a main part of a conventional vibration damping structure. In the figure, an upper suspension 5c (5a) and a lower suspension 5d (5b) are fixed to a fixed portion 4. Damping materials D1 and D2 are applied to these suspensions. Specifically, the damping materials D1 and D2 are applied to the upper surface of each suspension in the vicinity of the fixed position of the upper suspension 5c (5a) and the lower suspension 5d (5b).

However, according to such a vibration control structure,
Since the damping material D1 is applied to the upper surface of the upper suspension 5c (5a), this damping material D1
Is the suspension 5c (5
It projects upward from the upper surface of a). On the other hand, in the biaxial actuator 1, the objective lens 2a (see FIG. 12)
The optical disk is located above the. As described with reference to FIG. 8, the cartridge containing the optical disc is designed to be inserted and removed by moving above the biaxial actuator 1 in a substantially horizontal direction.

Therefore, if the damping material D1 projects upward from the upper suspension 5c (5a), it will interfere with the disk cartridge. Further, in order to prevent this, in order to reduce the amount of protrusion of h1 described above, it is necessary to reduce the coating amount of the damping material D1, but if this is done, a sufficient vibration damping effect cannot be expected. Further, if the gel-like damping material D1 is exposed on the upper surface of the upper suspension 5c (5a), the operator will touch it when handling the completed biaxial actuator.

On the other hand, in this embodiment, a vibration damping structure different from that shown in FIG. 9 is adopted. That is, as shown in FIG. 11, in the biaxial actuator 10 of the present embodiment, the upper assembly 17 and the lower assembly 18 are made separately as described above. Therefore, the lower assembly 18
Before joining and fixing to the upper assembly 17, a damping material is applied to the lower assembly 18 and the portion of the upper assembly 17 indicated by D (see FIG. 11). In FIG. 10, a damping material D1 is applied to the upper surface 16a of the attachment member 16 of the upper assembly 18 on the lower surface in the vicinity of the fixed position where the suspension 14c (a) is fixed. On the other hand, in the lower assembly 17, the lower portion 1 of the mounting member 16
The damping material D2 is applied to the surface (lower surface) facing the location where the damping material D1 is applied in the vicinity of the location where the suspension 14d (14b) is fixed to 6b. That is, in this embodiment, since the upper assembly 18 and the lower assembly 17 are separately formed and joined later, the damping members D1 and D2 can be easily provided at the inner position of the suspension 14 as shown in the drawing. Can be applied to. Here, as such a damping material, for example, PDM
-02 (Kyoritsu) and 3X's 31X-014-4
Gels such as are preferably applied.

By adopting such a damping structure, as shown in FIG. 10, the damping material D1 does not project upward from the upper surface of the suspension 14c (14a) as in the conventional case, and The biaxial actuator 10 can be formed in a small size. Therefore, as in the past,
The damping material D1 does not interfere with the disc cartridge. In addition, damping materials D1 and D2 made of gel
Is applied to the lower surface of the upper suspension 14c (14a) and the upper surface of the lower suspension 14d (14b) facing the upper suspension 14c (14a), and thus is not exposed to the outside. For this reason, even when handling the finished product, the gel is unlikely to adhere to the fingers of the worker, so that the workability is improved.

As described above, according to this embodiment, the lens holder is divided into an upper portion and a lower portion, and is formed integrally with the suspension by outsert molding or insert molding. The lens holder can be assembled by being joined by adhesion, ultrasonic welding, or the like. Therefore,
The assembly of the lens holder and the suspension is completed by a simple process of simply joining the upper and lower lens holders together. Thus, the number of parts is small and the number of assembling steps is also reduced, so that the cost is reduced.

Further, since the suspension is formed integrally with the lens holder, even if an external force is inadvertently applied, the suspension does not come off from the lens holder, and the reliability is improved. Will be improved. Furthermore, since the lens holder is divided into upper and lower parts and is integrally molded with the suspension, even if the lens holder has a complicated shape,
It can be easily molded, and the moldability is improved.

Further, either the upper part or the lower part of the lens holder is cut off from the lead frame and joined to the other, and after assembling the objective lens, the coil bobbin, etc., the other lead frame is cut off. As a result, when the lens holder is formed, the upper part or the lower part of the plurality of lens holders is molded by one molding step, so that the production efficiency is improved and
Assembly can be done easily.

In the above embodiment, the case where the present invention is used as an optical pickup for a mini disk has been described as an example, but the present invention is not limited to this, and the present invention can be applied to a biaxial actuator used for an optical pickup for other optical disks and the like. Obviously, can be applied. Further, in the above-described embodiment, the biaxial actuator having the upper and lower two pairs of suspensions has been described, but the suspensions may be composed of two or more pairs.

[0055]

As described above, according to the present invention, with a simple structure, the number of parts can be reduced, assembly can be performed easily, and reliability can be improved. An actuator and its manufacturing method can be provided.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a biaxial actuator according to the present invention.

FIG. 2 is an exploded perspective view of the biaxial actuator of FIG.

FIG. 3 is a divided perspective view showing an upper assembly and a lower assembly in which a lens holder, a suspension, and a mounting member are integrally formed during manufacturing of the biaxial actuator of FIG.

FIG. 4 is a perspective view showing a state where the upper assembly and the lower assembly of FIG. 3 are integrally molded with a suspension formed continuously on a lead frame.

5 is a perspective view of a coil bobbin in the biaxial actuator of FIG.

6 is a schematic view showing a first example of connection arrangement of terminal pins of the coil bobbin of FIG.

FIG. 7 is a schematic diagram showing a second example of the connection arrangement of the terminal pins of the coil bobbin of FIG.

8 is a cross-sectional view showing a state where the biaxial actuator of FIG. 1 is used as a pickup for a mini disc.

FIG. 9 is a partially enlarged side view showing a main part of a vibration damping structure in a conventional biaxial actuator.

FIG. 10 is a partially enlarged side view showing a main part of the vibration damping structure in the biaxial actuator according to the present embodiment.

FIG. 11 is a perspective view showing a portion where a damping material is applied in the biaxial actuator of the present embodiment.

FIG. 12 is a schematic perspective view showing an example of a conventional biaxial actuator.

[Explanation of symbols]

 10 Biaxial Actuator 11 Objective Lens 12 Lens Holder 13 Coil Bobbin 14 Suspension 15 Fixing Part 16 Mounting Member 17 Upper Assembly 18 Lower Assembly 19 First Lead Frame 20 Second Lead Frame 21 Terminal Pin 22 Yoke 23 Magnet 24 Cover 25 Mini disc cartridge 26 Mini disc D1 damping material D2 damping material D damping material application point

Claims (9)

[Claims] 1. A biaxial actuator, comprising: a lens holder including an objective lens and a coil bobbin; and a plurality of pairs of elastic supports having one end fixed to the lens holder and the other end fixed to a fixing portion. A biaxial actuator, wherein the lens holder is formed so as to integrally include elastic supports in a state where the lens holder is divided into an upper portion and a lower portion, and the upper and lower portions are joined to each other. . 2. A damping material is applied to at least one of the plurality of elastic supports on an inner surface where the elastic supports face each other.
The biaxial actuator according to 1. 3. The upper and lower parts of the lens holder are
The biaxial actuator according to claim 1, wherein the biaxial actuator is integrally formed with the elastic support body by outsert molding. 4. The upper and lower parts of the lens holder are
The biaxial actuator according to claim 1, wherein the biaxial actuator is integrally formed with the elastic support body by insert molding. 5. The upper and lower parts of the lens holder are
The biaxial actuator according to any one of claims 1 to 4, wherein the biaxial actuator is bonded to each other by adhesion. 6. The upper and lower parts of the lens holder are
The biaxial actuator according to any one of claims 1 to 4, wherein the biaxial actuators are joined to each other by ultrasonic welding. 7. A method of manufacturing a biaxial actuator, comprising: a lens holder including an objective lens and a coil bobbin; and a plurality of pairs of elastic supports having one end fixed to the lens holder and the other end fixed to a fixing portion. In, the upper part of the lens holder is integrally molded with the first lead frame having the upper elastic support, and the lower part of the lens holder is integrally molded with the second lead frame having the lower elastic support. Then, after that, the lens holder is formed by joining the upper part of the lens holder and the lower part of the lens holder to each other, thereby manufacturing the biaxial actuator. 8. The lower surface of the upper elastic support provided on the upper part of the lens holder and the lower elastic part provided on the lower part of the lens holder before the upper part of the lens holder and the lower part of the lens holder are joined together. On the upper surface of the support,
The method for manufacturing a biaxial actuator according to claim 7, wherein a damping material is applied to each. 9. Either one of the upper part and the lower part of the lens holder is cut off from the lead frame and joined to the other, and after assembling an objective lens, a coil bobbin, etc.,
The method for manufacturing a biaxial actuator according to claim 7, wherein the lens holder is formed by cutting off the other lead frame.