JPH07296406A - Mirror driving device - Google Patents

Abstract

PURPOSE:To reduce temperature drift caused by rotation of a reflection surface due to temperature variation and to improve easiness of assembling. CONSTITUTION:A coil 23d is buried covering an outer peripheral surface and one of openings of the coil 23d by a mirror holder 23 consisting of insulation resin. Further, the coil 23d and a conductive leaf spring 22 are mounted to the mirror holder 23 by holding and fixing the conductive leaf spring 22 provided at both sides of the mirror holder 23 respectively and being a mirror rotation shaft between a conductive resin member 26 and the mirror holder 23. Also, at the time, the coil 23d is electrically connected to the conductive leaf spring 22 by holding a line end part 23b of the coil 23d between the conductive leaf spring 22 and the conductive resin member 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror driving device used as a tracking actuator of an optical disk device for optically recording or reproducing information on a recording medium.

[0002]

2. Description of the Related Art In recent years, a mirror driving device has been used as an actuator for controlling a laser beam focused by an objective lens in a tracking direction of a disk. In such a mirror driving device, a moving coil type device, which is hard to generate an unnecessary magnetic field in the device, has been widely used along with an increasing demand for downsizing and thinning of an optical disk device.

A conventional moving coil type mirror driving device will be described below with reference to the drawings.

FIG. 13 is an exploded perspective view of a conventional mirror driving device, FIG. 14 is a completed perspective view thereof, and FIG. 15 is an axis F- of FIG.
FIG. 16 is a side sectional view including F, and FIG. 16 is a side sectional view including an axis G-G in FIG. 14.

In FIGS. 14 to 16, 51 is a mirror, 52 is a mirror holder, and the mirror 51 is adhesively fixed to one surface of the mirror holder 52 by means of an adhesive or the like. A pair of conductive leaf springs 53 are fixed to the other surface of the mirror holder 52 by means of an adhesive or the like. In addition, these conductive leaf springs 5
3 is the direction of the rotation axis of the mirror 51 (axis FF in FIG. 14).
Direction) is arranged symmetrically at both ends. 54 is a coil, and this coil 54 is fixed as follows. That is, the coil 54 is arranged such that the coil winding axis Q is perpendicular to the surface of the mirror 51, and the beam 52a and the leaf spring 53 protruding from the mirror holder 52 are provided by means of an adhesive or the like. It is glued and fixed to. The wire end portions of the coil 54 at the beginning and end of winding are electrically connected to the leaf spring 53 by soldering or the like.

The end portion of the leaf spring 53 protruding from the portion attached to the mirror holder 52 is fixed to the fixing portion 56 by a known means such as an adhesive material or a screw. Further, a permanent magnet 55 is adhesively fixed to the fixed portion 56. The permanent magnet 55 is arranged such that its magnetic pole is along the direction (axis GG in FIG. 14) orthogonal to the mirror rotation axis direction (axis FF in FIG. 14) in the mirror plane direction. ing. The permanent magnet 55 is inserted and arranged in the internal space of the coil 54 by being arranged in this way.

Next, the operation of the conventional mirror driving device will be described.

Since the magnetic flux is supplied to the coil 54 by the permanent magnet 55, a current is passed through the coil 54 using the plate spring 53 as an electrode to rotate the mirror 51 in the rotational axis direction (F-
A twisting motion occurs around the F-axis direction). Since the portions of the conductive leaf spring 53 that are bonded to the mirror 51, the mirror holder 52, the coil 54, and the fixed portion 56 act as a rigid body, the substantial spring portion is only the portion S shown in FIG. Becomes

Further, as shown in FIG. 16, a mirror driving device as an optical disc device emits an incident optical path from a laser beam (not shown) in a direction of about 90 °, and further detects a deviation amount from an arbitrary track of the disc (not shown). The control system is composed of an error detecting means (not shown), a servo circuit (not shown) for supplying a current corresponding to the error to the coil, and the like, thereby accurately following an arbitrary track.
(For example, Japanese Patent Laid-Open No. 1-200322).

[0010]

However, in the above-mentioned conventional example, the mirror holder 52 and the leaf spring 5 are made by using an adhesive.
3. Since the coil 54 is fixed, there is a problem that a beam shift, which is caused by a movement of the reflecting surface of the mirror 51 due to a temperature change, that is, a so-called temperature drift occurs.

That is, it is difficult to uniformly apply the adhesive used for adhering these members, and the unevenness or protrusion of the adhesive causes the mirror holder 52, the leaf spring 53, and the like.
It was unavoidable that the coil and the coil 54 exist between them. Furthermore, the linear expansion coefficient of the adhesive is about 1 × 10 ^{−4, which is} about one digit larger than the linear expansion coefficient of metal. For this reason, if the adhesive expands and contracts due to temperature changes,
Unexpected deformation occurred in the mirror holder 52 and the leaf spring 53, and a temperature drift occurred.

The deviation of the laser beam due to such temperature drift causes an error when following a track on a disk (not shown), which makes it difficult to design and adjust the control system of the optical disk device, which is very inconvenient. It was a thing.

Further, in the above conventional example, the leaf spring 53 and the end of the winding of the coil 54 are electrically connected by soldering. However, the molten metal flow of the solder tends to vary, and when such molten metal flow variation occurs, the mass distribution of the mirror driving device becomes non-uniform, and high-order resonance unintended in the design occurs or The frequency of the resonance mode varies.

Further, such soldering work must be performed manually, which makes it difficult to mass-produce mirror drive devices of uniform quality.

Further, the heat during the soldering work sometimes causes a residual stress between the mirror holder 52 and the leaf spring 53 due to thermal deformation. When such residual stress is released by temperature change (cooling), the leaf spring 53
This causes an unintended deformation between the mirror holder 52 and the mirror holder 52, which also causes the temperature drift.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a mirror driving device that reduces temperature drift and eliminates the need for soldering work at the wire end of a coil. And

[0017]

In order to achieve the above object, a mirror driving device of the present invention includes a coil for driving a mirror, and a coil for covering the outer peripheral surface of the coil and one of the openings to embed the coil. A mirror holder having a convex mirror adhesive portion on the surface covering the one opening, a mirror surface-attached to the mirror adhesive portion, and elasticity provided on both sides of the mirror holder to serve as a mirror rotation axis. A first adhesive resin portion for fixing the elastic body to the mirror holder by sandwiching the elastic plate body between the body and the mirror holder, and a fixing portion for supporting and fixing the tip side of the elastic plate body. And a magnet provided in the fixed portion so as to be magnetized perpendicularly to the mirror rotation axis and parallel to the reflection surface of the mirror and close to the other opening of the coil. Shi There.

[0018]

According to the present invention, with the above-mentioned structure, the coil is embedded in the mirror holder, and there is no need to bond and fix both with an adhesive.

Furthermore, since the elastic body is fixed to the mirror holder by sandwiching the elastic body between the mirror holder and the first adhesive resin portion, there is no need to apply an adhesive to the mirror holder or the elastic body. .

As described above, since it is not necessary to use the adhesive to fix the coil and the plate-like elastic body, the influence of the temperature drift caused by the adhesive can be reduced.

Further, if the elastic body and the first adhesive resin portion are made of a conductive material and the first adhesive resin portion and the mirror holder are welded while sandwiching the ends of the coil, the coil and the elastic body are formed. You will be able to make electrical connections without soldering. Therefore, there are no soldered parts,
The occurrence of resonance and the influence of residual stress due to the presence of the soldered portion are reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A mirror driving device according to an embodiment of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of a moving coil type mirror driving device according to a first embodiment of the present invention, FIG. 2 is a completed perspective view thereof, FIG. 3 is a side sectional view including an axis AA, and FIG. FIG. 5 is a partially enlarged view of a C portion of FIG. 5, and FIG.

In FIGS. 1 to 5, 1 is a mirror and 2 is a mirror.
Is a pair of H-shaped conductive leaf springs, 3 is a mirror holder made of insulating resin, and 5 is a fixed portion. The mirror holder 3 is formed in a concave ring shape by embedding the coil 3d by covering the outer peripheral surface of the coil 3d and one opening. A convex mirror bonding portion 3c is provided at the center of the coil opening covering surface 3e of the mirror holder 3. Further, protrusions 3a are provided on both ends of the axis AA (see FIG. 2) on the coil opening covering surface 3e. Further, the wire end portion 3b of the coil 3d is drawn out from the coil opening covering surface 3e. Holes 2a are formed at both ends of the conductive leaf spring 2.

The conductive leaf spring 2 is attached to the mirror holder 3 as follows. That is, the conductive leaf spring 2 is positioned along the axis AA by an external jig (not shown) with the hole 2a inserted in the protruding portion 3a. Then, as shown in FIG. 3, the photocurable resin 7A is dropped on the tip of the protruding portion 3a protruding from the hole 2a. Furthermore, the photocurable resin 7A is cured by irradiating the photocurable resin 7A with light. Then, the conductive leaf spring 2
Is the cured portion 7a of the photocurable resin 7A and the mirror holder 3
It is sandwiched by and is attached and fixed to the mirror holder 3. In this embodiment, the photo-curable resin 7A constitutes the first adhesive resin portion. Furthermore, the coil wire end 3b
Is electrically connected to the conductive leaf spring 2 by a conducting means 6 such as soldering.

On the other hand, the conductive leaf spring 2 protruding from the mirror holder 3 is attached to the front end side as follows. That is, the tip end side of the conductive leaf spring 2 is positioned by an external jig (not shown) with the other hole 2a inserted in the protruding portion 5a provided in the fixing portion 5. Then, the photocurable resin 7B is dropped onto the protruding portion 5a and is irradiated with light to cure the photocurable resin 7B. The cured portion 7B of the photocurable resin 7B and the fixed portion 5 are electrically conductive leaf springs. Two
The end of the conductive leaf spring 2 is attached to the fixed portion 5 by sandwiching. In this embodiment, the photo-curable resin 7B constitutes the second adhesive resin portion.

A permanent magnet 4 is attached to the fixed portion 5. The permanent magnet 4 is located on the opening side of the mirror holder 3, and the magnetic pole direction is perpendicular to the mirror rotation axis, that is, the axis AA (see FIG. 2) and parallel to the mirror reflection surface (coil winding). It is arranged so as to be in a direction (perpendicular to the line axis), and is fixed to the fixing portion 5 by means of an adhesive or the like in such a state.

The mirror 1 is surface-mounted on the mirror bonding portion 3c of the mirror holder 3 by means of an adhesive or the like.

In this mirror driving device, the S portion (see FIG. 2) of the conductive leaf spring 2 along the axis AA is the rotation axis, and the mirror 1 is rotated by twisting the S portion. Is designed to rotate. The turning operation when the coil 3d is energized in FIG. 5 is the same as the operation when the coil 54 is energized in FIG. 16 of the conventional example, and therefore detailed description thereof is omitted.

The difference between the conventional example and this example is that the coil 3
By embedding d in the insulating resin to form the mirror holder 3, the adhesive for fixing the coil is eliminated, and the conductive leaf spring 2 is connected to the mirror holder 3 and the photocurable resin (first
It is sandwiched by the adhesive resin portion 7A and the conductive leaf spring 2 is sandwiched by the fixing portion 5 and the photocurable resin (second adhesive resin portion) 7B.

Therefore, the adhesive that fixes the coil 54 and the mirror holder 52 in the conventional example is eliminated, and the displacement of the mirror reflecting surface due to the expansion and contraction of the adhesive in this portion due to temperature change is reduced. Has been done. Furthermore, in the conventional example, the adhesive that fixed the conductive leaf spring 53 is eliminated, and the photocurable resin 7A is left in this portion.
Since the uncured portion 7b of FIG. 4 (see FIG. 4) remains only a little, the displacement of the mirror reflecting surface due to the expansion and contraction of the adhesive in this portion due to the temperature change is also reduced.

The effect of preventing the displacement of the mirror reflection surface is to construct the mirror holder 3 by embedding the coil 3d with an insulating resin, and to form the conductive leaf spring 2 with the mirror holder 3 and the photocurable resin 7A (first). Although it can be exhibited only by sandwiching with 1 adhesive resin part), in the present embodiment,
The conductive leaf spring 2 is sandwiched between the fixed portion 5 and the photocurable resin 7B (second adhesive resin portion). With this configuration, the effect of preventing displacement of the mirror reflection surface is further enhanced. .

The coil wire end portion 3b may be pulled out to a substrate (not shown) provided on the fixed portion 5. With this structure, the leaf spring 2 need not be conductive. Alternatively, the mirror holder 3 may be made of a conductive resin. further,
The protrusions 3a and 5a are made of photo-curable resin 7A, 7B.
Since it is for increasing the contact area between and, it may be omitted.

Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 6 is an exploded perspective view of a moving coil type mirror driving device according to a second embodiment of the present invention, FIG. 7 is a completed perspective view thereof, and FIG. 8 is a side sectional view including an axis DD. 6 to 8, 11 is a mirror and 12 is a pair of conductive leaf springs. 13 is a mirror holder made of an insulating resin, 13d is a coil, 15 is a fixing portion, 16 is a rectangular plate-shaped resin member for fixing a conductive leaf spring,
An insertion hole 16a is formed in the center thereof.

The mirror holder 13 is formed in a concave ring shape by embedding the coil 13d by covering the outer peripheral surface of the coil 13d and one opening. A convex mirror bonding portion 13c is provided at the center of the coil opening covering surface 13e of the mirror holder 13. Further, projecting portions 13a are provided at both end portions of the axis DD (see FIG. 7) on the coil opening covering surface 13e. Further, the wire end portion 13b of the coil 13d is drawn out from the coil opening covering surface 13e. Holes 12 are formed at both ends of the conductive leaf spring 12, respectively.
a is formed.

The conductive leaf spring 12 is attached to the mirror holder 13 as follows. That is, the conductive leaf spring 12 is positioned along the axis D-D by an external jig (not shown) with the hole 12a inserted in the protrusion 13a. Then, by inserting the hole 16a of the resin member 16 into the tip of the protruding portion 13a protruding from the hole 13a, the conductive leaf spring 12 is sandwiched between the mirror holder 13 and the resin member 16. Further, in this state, the mirror holder 13 and the resin member 16 are fixed by welding means such as heat welding or ultrasonic welding, and the conductive leaf spring 12 is sandwiched and fixed. In this embodiment, the resin member 16 constitutes the first adhesive resin portion. Furthermore, the wire end portion 13 of the coil 13
b and the conductive leaf spring 12 are electrically connected on the coil opening covering surface 13e by a conducting means 17 such as soldering.

On the other hand, the tip end side of the conductive leaf spring 12 from which the mirror holder 13 projects is attached as follows. That is, the tip side of the conductive leaf spring 12 is positioned by an external jig (not shown) in a state where the other hole 2a is inserted into the protruding portion 15a provided in the fixing portion 15. Then, the photo-curable resin 18 is dropped onto the protrusion 13a and irradiated with light to cure the photo-curable resin 18,
By sandwiching the conductive leaf spring 12 between the cured portion of the photocurable resin 18 and the fixing portion 15, the conductive leaf spring 1
The tip side of 2 is attached to the fixing portion 15. In this embodiment, the photo-curable resin 18 constitutes the second adhesive resin portion.

A permanent magnet 14 is attached to the fixed portion 15. Permanent magnet 14 is mirror holder 13
Is located on the opening side of the magnetic pole and is arranged such that the magnetic pole direction is perpendicular to the axis D-D and parallel to the mirror reflection surface (perpendicular to the coil winding axis). The fixed state is fixed to the fixing portion 15 by means of an adhesive or the like.

The mirror 11 is fixed to the mirror bonding portion 13c of the mirror holder 13 by means of adhesive or the like.

The second embodiment constructed as described above is as follows:
Although the structure is basically the same as that of the first embodiment, the difference is that the conductive leaf spring 12 is sandwiched by welding the mirror holder 13 and the resin member 16.

In this mirror driving device, the coil 1
Since the operation when 3d is energized is the same as the operation when the coil 54 is energized in FIG. 16 of the conventional example, detailed description thereof will be omitted.

The difference between the conventional example and this embodiment is that the coil 1
By embedding 3d with an insulating resin to form the mirror holder 13, the adhesive is eliminated, and the conductive leaf spring 1
2 is sandwiched and welded by the mirror holder 13 and the resin member 16 (first adhesive resin portion), and the conductive leaf spring 12 is fixed by the fixing portion 15 and the photocurable resin 18 (second adhesive resin portion). It is in the point of sandwiching.

Therefore, the adhesive that fixes the coil 54 and the mirror holder 52 in the conventional example is eliminated, and the displacement of the mirror reflecting surface due to the expansion and contraction of the adhesive in this portion due to temperature change is reduced. Has been done. Furthermore, in the conventional example, the adhesive that fixed the conductive leaf spring 53 is eliminated, and the displacement of the mirror reflecting surface due to the adhesive in this portion expanding and contracting due to temperature change is also reduced. .

The effect of preventing the displacement of the mirror reflecting surface as described above is such that the coil 13d is embedded in an insulating resin to form a mirror holder, and the conductive leaf spring 12 is connected to the mirror holder 13 and the resin member 16 (first adhesive resin). However, in the present embodiment, the conductive leaf spring 2 is further sandwiched between the fixing portion 15 and the photo-curable resin 18 (second adhesive resin portion), and is reflected by the mirror. The effect of preventing surface displacement is further enhanced.

If the fixing portion 15 is made of resin and further has a resin member similar to the resin member 16, the fixing portion 15 and the conductive leaf spring 12 are fixed to each other by the resin member and the fixing portion 15. It can also be carried out by sandwiching welding with. Also, as in the first embodiment, the wire end portion 13 of the coil 13d is
b may be drawn out to a substrate (not shown) provided in the fixing portion 15, and with this structure, the conductive leaf spring 12 may not be conductive. Furthermore, the mirror holder 13 may be made of a conductive resin.

Next, a third embodiment of the present invention will be described with reference to the drawings.

FIG. 9 is an exploded perspective view of a moving coil type mirror driving device according to the third embodiment of the present invention, and FIG.
Is a completed perspective view thereof, and FIG. 11 is a side sectional view including an axis EE. In FIG. 9 to FIG. 11, 21 is a mirror, 22
Is a pair of H-shaped conductive leaf springs, 23 is a mirror holder made of an insulating resin, and 26 is a rectangular flat plate-shaped conductive resin member for fixing the conductive leaf springs. Are formed.

The mirror holder 23 is formed in a concave ring shape by embedding the coil 23d by covering the outer peripheral surface of the coil 23d and one opening. A convex mirror bonding portion 23c is provided at the center of the coil opening covering surface 23e of the mirror holder 23. Further, protrusions 23a are provided on both end portions of the axis EE (see FIG. 10) on the coil opening covering surface 23e. Further, the wire end portion 23b of the coil 23d is drawn out from the coil opening covering surface 23e. Holes 22a are formed at both ends of the conductive leaf spring 22, respectively.

The conductive leaf spring 22 is attached to the mirror holder 23 as follows. That is,
The conductive leaf spring 22 is positioned along the axis E-E by an external jig (not shown) with the hole 22a inserted in the protrusion 23a. Then, by inserting the hole 26a of the conductive resin member 26 into the tip end of the protruding portion 23a protruding from the hole 22a, the conductive leaf spring 22 is attached to the mirror holder 2.
3 and the conductive resin member 26. At this time, the wire end portion 23b of the coil 23d is sandwiched between the conductive leaf spring 22 and the conductive resin member 26. Further, in this state, the mirror holder 23 and the resin member 26 are fixed by welding means such as heat welding or ultrasonic welding, and the conductive leaf spring 22 is clamped and fixed. Therefore, the conductive leaf spring 22 is fixed to the mirror holder 23 and the coil 23d
The wire end portion 23b of is electrically connected to the conductive leaf spring 22.

In this embodiment, the conductive resin member 2
The first adhesive resin portion is composed of 6.

On the other hand, the conductive leaf spring 22 from which the mirror holder 23 projects is attached to the front end side in the following manner. That is, the tip end side of the conductive leaf spring 22 is positioned by an external jig (not shown) in a state where the other hole 22a is inserted into the protruding portion 25a provided in the fixing portion 25. Then, the photo-curable resin 28 is dropped onto the protruding portion 25 a and is irradiated with light to cure the photo-curable resin 28, and the conductive leaf spring 22 is cured by the cured portion of the photo-curable resin 28 and the fixing portion 25. The end of the conductive leaf spring 22 is attached to the fixed portion 25 by sandwiching the. In addition,
In this embodiment, the photo-curable resin 28 constitutes a second adhesive resin portion.

A permanent magnet 24 is attached to the fixed portion 25. The permanent magnet 24 is a mirror holder 23.
Is located on the side of the opening and the magnetic pole direction is perpendicular to the axis E-E and parallel to the mirror reflection surface (perpendicular to the coil winding axis). It is fixed to the fixed portion 25 at.

The mirror 21 is fixed to the mirror bonding portion 23c of the mirror holder 23 by means of adhesive or the like.

The difference between the third embodiment and the second embodiment configured as described above is that the conductive resin member 26 is used as a means for fixing the conductive leaf spring 22 to the mirror holder 23. The conductive leaf spring 22 is sandwiched and welded by the resin member 26 and the mirror holder 23, and at the same time, the coil 23 is welded.
This is the point where the wire end portion 23b of the above is electrically connected to the conductive leaf spring 22.

In the mirror driving device of the third embodiment constructed as described above, the operation when the coil 23d is energized is the same as the operation when the coil 54 is energized in FIG. 16 of the conventional example, so a detailed description will be given. Is omitted.

The difference between the conventional example and the third embodiment is that the coil 23d is embedded with an insulating resin, and the conductive leaf spring 22 is sandwiched and welded between the mirror holder 23 and the conductive resin member 26. This is the point that the adhesive used conventionally for fixing the conductive leaf spring 22 and the coil 23d to the mirror holder 23 is eliminated, and the temperature drift caused by such an adhesive is reduced. The wire end portion 23b of the coil 23d is sandwiched between the conductive leaf spring 22 and the conductive resin member 26 so as to be electrically connected to the leaf spring 22.
This eliminates the soldering work between the b and the conductive leaf springs 22 to solve the problems of resonance and residual stress caused by such soldering points and improve the assemblability.

In the conventional example, the coil 54 and the leaf spring 5 are
Although 4 is limited to materials that can be soldered, according to the configuration of the present embodiment, these need only be conductive materials, and the degree of freedom in design is correspondingly increased. .

FIG. 12 shows the results of comparing the temperature drifts of the conventional mirror driving device and the mirror driving device of the present invention, specifically, the mirror driving device of the first embodiment. As is clear from this comparison result, the mirror rotation amount when the temperature rises from room temperature by 40 degrees is 1.4 milliradians in the conventional example, while in the present invention, it is reduced to 0.4 milliradians, which is 3/3 of the conventional value. You can see that it is less than 1.

[0059]

As described above, according to the present invention, the coil is embedded in the mirror holder, and the elastic body is sandwiched between the mirror holder and the first adhesive resin portion, so that the elastic body is held by the mirror holder. The temperature drift, which is a drawback of the moving coil type mirror driving device, can be reduced because of being fixed to, and the reflection accuracy of the mirror driving device can be improved accordingly.

If the elastic body is made of a conductive member and the wire end of the coil is clamped between the elastic body and the conductive resin member, the elastic body is fixed to the mirror holder. It is no longer necessary to perform soldering in order to pull out to the outside.Therefore, there is no unevenness in mass distribution due to the presence of soldering parts, and higher-order resonance or Since there is no variation in the frequency of the resonance mode and the soldering work is not required, the assemblability is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a mirror driving device according to a first embodiment of the present invention.

FIG. 2 is a completed perspective view of the same embodiment.

3 is a side sectional view including the axis AA of FIG. 1 in the embodiment. FIG.

FIG. 4 is a partially enlarged view of portion C of FIG. 3 in the same embodiment.

FIG. 5 is a sectional view taken along line BB of FIG. 3 for explaining the operation in the embodiment.
FIG.

FIG. 6 is an exploded perspective view of a mirror driving device according to a second embodiment of the present invention.

FIG. 7 is a completed perspective view of the example.

FIG. 8 is a side sectional view including the axis D-D of FIG. 6 in the example.

FIG. 9 is an exploded perspective view of a mirror driving device according to a third embodiment of the present invention.

FIG. 10 is a completed perspective view of the example.

FIG. 11 is a side sectional view including the axis EE of FIG. 10 in the example.

FIG. 12 is a diagram comparing the temperature drifts of the present invention and the conventional example.

FIG. 13 is an exploded perspective view of a conventional mirror driving device.

FIG. 14 is a completed perspective view of a conventional mirror drive device.

FIG. 15 is a side sectional view including the axis FF of FIG. 14 in the conventional example.

FIG. 16 is a side sectional view including the axis G-G of FIG. 14 in the conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mirror 2 Conductive leaf spring 3 Mirror holder 4 Permanent magnet 5 Fixing part 6 Conducting means 7A Photocurable resin (first adhesive resin part) 11 Mirror 12 Conductive leaf spring 13 Mirror holder 14 Permanent magnet 15 Fixing part 16 Resin member (First adhesive resin portion) 17 Conducting means 18 Photocurable resin (second adhesive resin portion) 21 Mirror 22 Conductive leaf spring 23 Mirror holder 24 Permanent magnet 25 Fixing portion 26 Conductive resin member (first adhesive resin portion) 28 Photocurable resin (second adhesive resin part)

Claims (8)

[Claims] 1. A mirror driving coil, a mirror holder having an outer peripheral surface of the coil and one opening covered with the coil and having a convex mirror bonding portion on a surface covering the one opening. Holding the plate-shaped elastic body between the mirror that is faced to the mirror bonding portion, elastic bodies that are provided on both sides of the mirror holder and serve as mirror rotation axes, and the mirror holder. A first adhesive resin portion for fixing the elastic body to the mirror holder, a fixing portion for supporting and fixing the tip end side of the plate-like elastic body, and a reflection surface of the mirror perpendicular to the mirror rotation axis. And a magnet provided in the fixed portion so as to be magnetized in parallel with each other and close to the other opening of the coil. 2. The mirror driving device according to claim 1, wherein the first adhesive resin portion is made of a photocurable resin. 3. The mirror driving device according to claim 1, wherein the mirror holder is made of resin, and the mirror holder and the first adhesive resin portion are welded to each other. 4. The mirror driving device according to claim 3, wherein the mirror holder and the first adhesive resin portion are ultrasonically welded to each other. 5. The mirror holder is made of an insulating material, while the elastic body and the first adhesive resin portion are made of a conductive material, and the first adhesive resin portion and the mirror holder are line end portions of the coil. The mirror driving device according to claim 3, wherein the welding is performed in a state of sandwiching. 6. The second adhesive resin portion for attaching the tip side of the elastic body to the fixing section by sandwiching the tip side of the elastic body between the fixing section and the fixing section.
The described mirror driving device. 7. The mirror driving device according to claim 6, wherein the second adhesive resin portion is made of a photocurable resin. 8. The mirror driving device according to claim 6, wherein the fixing portion is made of resin, and the fixing portion and the second adhesive resin portion are welded to each other.