KR20160037681A - Auto focus device for camera - Google Patents

Abstract

The present invention relates to an automatic focus device for a camera, and more specifically, to an automatic focus device for a camera which can automatically adjust the focus of a camera lens. According to an embodiment of the present invention, the automatic focus device for a camera comprises: a lens barrel; an upper case disposed on an upper portion of the lens barrel; an elastic unit wherein one end thereof is supported on the upper case, and the other end thereof is supported on an elastic support unit protruding along a circumference of the lens barrel; a middle case which is mounted on the upper case, and supports the lens barrel; an automatic focus adjustment unit which is mounted on the middle case, and adjusts a height of the lens barrel; a lower case mounted on a lower portion of the middle case; and a shield cover which encloses the upper case, the middle case, and the lower case, and is mounted on the lower case. The automatic focus adjustment unit lifts or lowers the lens barrel according to contraction or relaxation of a shape-memory alloy wire.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an auto-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an autofocusing apparatus for a camera, and more particularly, to an autofocusing apparatus for a camera in which a focus of a camera lens is automatically adjusted.

The camera is an optical device for photographing a subject, and there is an analog method of projecting an image accommodated through a lens onto a film and a digital method of projecting the image accommodated through the lens onto an image sensor for recording.

The digital camera is mounted on a mobile terminal such as a mobile phone and a tablet PC so that the user can conveniently photograph the subject. The camera mounted on the mobile terminal has an optical zoom function, an auto focus function And a variety of functions.

At this time, when a mobile camera has a high-resolution of 5 million or more, most mobile cameras are equipped with an auto-focus actuator (AFA) for a camera module.

The autofocus device for a camera module includes a voice coil motor (VCM), a hybrid voice coil motor, a hybrid encoder, and a piezo motor using an electromagnetic motor .

However, all of these methods are capable of realizing the performance of an autofocusing device for a camera module, but are complicated in structure, difficult to automate the process, and difficult to reduce the unit cost.

Particularly, as the number of camera modules of 10 megapixel or more is increasing, the performance of an autofocusing device for a camera module is more precise, and a high reliability is demanded in the reduction of a module thickness and correction of a shaking motion.

Therefore, it is necessary to develop an autofocus device for a camera module that can automate the entire process with a simple low-pass structure and can satisfy a specification with high reliability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic focusing apparatus for a camera which is simple in structure and capable of automating the entire process.

According to an aspect of the present invention, there is provided a lens barrel comprising: a lens barrel; An upper case provided above the lens barrel; An elastic part having one end supported by the upper case and the other end supported by an elastic supporting unit protruding along the periphery of the lens barrel; A middle case coupled to the upper case and supporting the lens barrel; An auto focus adjusting unit coupled to the middle case and adjusting a height of the lens barrel; A lower case coupled to a lower portion of the middle case; And a shield cover which surrounds the upper case, the middle case, and the lower case, and is coupled to the lower case, wherein the automatic focus adjustment unit raises or lowers the lens barrel in accordance with the contraction or relaxation of the shape memory alloy wire The present invention provides an automatic focusing device for a camera.

In one embodiment of the present invention, the middle case includes a middle case body portion forming an outer shape; A pair of lever inserting portions installed opposite to the middle case body portion; A terminal support protruding from an upper surface of the middle case body; A tension adjusting unit provided on the middle case body to face the terminal supporting unit; And a boundary plate disposed inside the middle case and configured to separate the upper case and the lower case from each other.

According to an embodiment of the present invention, the tension adjusting unit is coupled to a tension adjusting groove formed to have a predetermined length in the body of the middle case, and the tension of the shape memory alloy wire is changed according to a position of engagement with the tension adjusting groove. ) Can be adjusted.

In one embodiment of the present invention, the auto-focus adjusting unit may include: the shape memory alloy wire which is contracted or relaxed according to application of an electric current; A terminal connected to both ends of the shape memory alloy wire and through which current flows; And a lever adapted to be coupled to the lever insertion portion.

In one embodiment of the present invention, the lever includes: a lever body inserted into the lever insertion portion; A lever fixing portion protruding symmetrically on both sides of the lever body portion and engaged with a lever coupling groove formed at a lower end of the lever insertion portion; A lens barrel support portion that protrudes symmetrically from the lever body portion and supports the lens barrel; And a latch portion provided at a lower portion of the lever body portion.

According to an embodiment of the present invention, the latching portion may be an open latching portion whose one side is opened when viewed in section, or a closed latching portion in which a hole is formed and a wire is inserted through the latching portion.

In one embodiment of the present invention, the protrusion unit may be formed at a portion where the retaining portion is in contact with the shape memory alloy wire.

The effects of the automatic focusing device for a camera according to the present invention will be described as follows.

First, according to the present invention, the auto focus adjustment section can selectively move the lens barrel in accordance with the contraction or relaxation of the shape memory alloy wire. That is, when the shape memory alloy wire is contracted or relaxed depending on whether or not the current is applied, the shape memory alloy wire can rotate the lever to raise or lower the lens barrel. An automatic focusing device for a camera using such a shape memory alloy wire is simple in structure and easy to assemble, making it easy to mass-produce.

Secondly, according to the present invention, it is possible to miniaturize the automatic focusing device for a camera. That is, when the shape memory alloy wire is used, the number of parts used in the automatic focusing device for a camera can be reduced, thereby miniaturizing the automatic focusing device for a camera.

Third, according to the present invention, the assembling structure can be simplified. That is, instead of laminating all the components in the conventional lower case, each process can be simplified by advancing the primary assembly between the upper case and the middle case and dividing the secondary assembly between the middle case and the lower case .

Fourth, according to the present invention, the boundary plate of the middle case can prevent foreign matter from entering the inside of the camera automatic focusing apparatus.

Fifth, according to the present invention, the tension adjusting unit is coupled to the tension adjusting groove formed to have a predetermined length in the body of the middle case, and the tension of the shape memory alloy wire can be adjusted according to the position of engagement with the tension adjusting groove.

Sixth, according to the present invention, the lens barrel is supported through the lens barrel support portion provided in each lever, so that the lens barrel can be raised or lowered stably.

Seventhly, according to the present invention, the protrusion unit is provided in the latching part to improve the performance of the shape memory alloy wire. That is, the shape memory alloy wire can be improved in performance by reducing the contact area between the shape memory alloy wire and the engagement portion, thereby reducing the loss due to friction when the shape memory alloy wire is contracted or relaxed.

The effects of the present invention are not limited to the above effects, and all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims

Should be understood to include.

FIG. 1 is a perspective view of an automatic focusing apparatus for a camera as viewed from above, according to an embodiment of the present invention.
2 is an exploded view of an autofocusing apparatus for a camera according to an embodiment of the present invention.
FIG. 3 is a perspective view showing the lower structure of the middle case before the auto-focus adjusting unit according to the embodiment of the present invention is engaged.
4 is a perspective view showing an upper structure of a middle case after the auto-focus adjusting unit according to an embodiment of the present invention is engaged.
FIG. 5 is a perspective view showing a bottom structure of a middle case after the auto-focus adjusting unit according to an embodiment of the present invention is combined.
FIG. 6 is a perspective view of a top view of a combined state of a terminal and a shape memory alloy wire according to an embodiment of the present invention. FIG.
7 is a perspective view of a lever viewed from above in accordance with an embodiment of the present invention.
FIG. 8 is a cross-sectional view of I-I of FIG. 7 showing an open engaging portion and a closed engaging portion according to an embodiment of the present invention.
FIG. 9 is a cross-sectional view showing a latching portion provided with a conventional latching portion and a projection according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when a part is referred to as "comprising ", it means that it can include other components as well, without excluding other components unless specifically stated otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a camera autofocusing apparatus viewed from a top surface according to an embodiment of the present invention, and FIG. 2 is an exploded view of a camera autofocusing apparatus according to an embodiment of the present invention.

1 and 2, an automatic focusing apparatus 1000 for a camera according to the present invention includes a lens barrel 1100, an upper case 1200, an elastic part 1150, a middle case 1400, An adjusting unit 1600, a lower case 1800, and a shield cover 1900. [

The lens barrel 1100 is provided between the upper case 1200 and the middle case 1400 and includes a lens (not shown) for photographing the subject.

The upper case 1200 is provided on the lens barrel 1100 and can support the lens barrel 1100 and the elastic part 1150.

The elastic part 1150 may be supported on an elastic supporting unit 1140 having one end supported on the upper case and the other end protruding along the periphery of the lens barrel 1100. At this time, the elastic portion 1150 may include a spring.

The middle case 1400 is coupled to the upper case 1200 and can support the lens barrel 1100.

The automatic focus adjustment unit 1600 is coupled to the middle case 1400 and can adjust the height of the lens barrel 1100. [ More specifically, as the shape memory alloy wire 1640 of the automatic initial adjustment unit 1600 contracts or relaxes, the lens barrel 1100 can be raised or lowered.

The lower case 1800 may be coupled to the lower portion of the middle case 1400.

The shield cover 1900 surrounds the upper case 1200, the middle case 1400 and the lower case 1800 and is coupled to the lower case 1800.

Specifically, after the upper case coupling groove 1010, the middle case coupling groove 1020, and the lower case coupling groove 1030 are matched with each other by bolts (not shown), the fixing grooves 1910 of the shield cover 1900 The fixing protrusion 1810 protruding from the lower case 1800 can be inserted and coupled.

In order to explain the structure of the middle case 1400, the following drawings are referred to.

FIG. 3 is a perspective view showing the lower structure of the middle case before the auto-focus adjusting unit according to the embodiment of the present invention is engaged. FIG. 4 is a perspective view of the middle case, FIG. 5 is a perspective view showing a lower structure of a middle case after the auto-focus adjusting unit according to an embodiment of the present invention is combined. FIG.

3 to 5, the middle case 1400 includes a middle case body 1405, a lever inserting portion 1420, a terminal supporting portion 1430, a tension adjusting portion 1450, and a boundary plate 1480 .

The middle case body 1405 forms an outer shape of the middle case 1400 and can support a part coupled to the middle case 1400.

The lever inserting portion 1420 may be provided at a position where one pair of the lever inserting portions 1420 are opposed to each other on the upper surface of the middle case body portion 1405 and the lever inserting portion 1420 may be engaged with the lever 1700.

The terminal support portion 1430 may protrude from the upper surface of the middle case body portion 1405. At this time, a groove (not shown) may be formed in the lower portion of the terminal supporting portion 1430 by the thickness of the pressing portion 1666.

That is, the terminal support portion 1430 is provided at a lower height than that of the middle case 1400 so that when the auto focus adjustment portion 1600 is coupled to the middle case 1400, the shape memory alloy wire 1640 is held horizontal .

The tension adjusting unit 1450 may be provided on the middle case body 1405 so as to face the terminal supporting unit 1430.

The tension adjusting unit 1450 may be coupled to the tension adjusting groove 1440 formed in the middle case body 1405 to have a predetermined length. At this time, the tension of the shape memory alloy wire 1640 can be adjusted according to the position of engagement with the tension adjusting groove 1440.

For example, the tension adjusting unit 1450 moves according to the tension adjusting groove 1440. When the tension adjusting unit 1450 is engaged with the crescent-shaped tension adjusting groove 1440, the tension of the shape memory alloy wire 1640 is changed according to the engagement position of the tension adjusting groove 1400 It can be different.

Accordingly, since the middle case 1400 can adjust its own tension, it is not necessary to make a component for adjusting the tension separately. That is, the process is simplified.

The boundary plate 1480 may be provided inside the middle case 1400 to separate the upper case 1200 (see FIG. 2) and the lower case 1800 (see FIG. 2).

At this time, the middle case 1400 divides the process through the boundary plate 1480, so that the process can be performed simply and stably.

For example, the conventional assembling process was a method of stacking all the parts in the lower case. In such a case, the process of assembling each part becomes complicated, and there is no guide for fixing each part, so that a defect occurs.

However, in the automatic focusing device for a camera 1000, the middle case 1400 and the boundary plate 1480 are provided to carry out the first process between the upper case 1200 and the middle case 1400, And the lower case 1800, the assembly process is simplified and simplified.

Each process will be concretely described. The first process is a process of coupling the parts between the upper case 1200 and the middle case 1400.

The lever body 1710 of the lever 1700 is inserted into the lever insertion portion 1420 provided in the middle case 1400 and the lens barrel 1100 is placed on the lens barrel support portion 1720.

Next, the elastic part 1150 is supported on the elastic supporting unit 1140 protruding along the periphery of the lens barrel 1100, and finally the upper case 1200 is fastened to the middle case 1400, Can be completed.

The second process is a process of joining the parts between the middle case 1400 and the lower case 1800.

First, the automatic focus adjustment unit 1600 may be coupled to the middle case 1400. [

At this time, depending on the shape of the engaging portion 1750, the manner of joining the automatic focus adjusting portion 1600 may be different.

That is, in the case of the open engaging portion 1754 (see FIG. 8A), the compression bonding portion 1666 of the terminal 1660 and the shape memory alloy wire 1640 are bonded to the middle case 1400 at the same time .

On the other hand, in the case of the closed engaging portion 1756 (see Fig. 8 (b)), the terminal 1660 is previously coupled to the middle case 1400, and the shape memory alloy wire 1640 is inserted into the closed engaging portion 1756, As shown in FIG.

Then, the shape memory alloy wire 1640 can be coupled to the crimping portion 1666 of the terminal 1660. [

When the auto-focus adjusting unit 1600 is coupled to the middle case 1400, the lower case 1800 is coupled to the lower portion of the middle case 1400.

The second step can be completed by inserting and fixing the fixing protrusion 1810 protruding from the lower case 1800 into the fixing groove 1910 of the shield cover 1900.

Each step of assembling each of the camera automatic focusing apparatus 1000 is simple, and the entire process can be automated.

In order to explain the auto-focus adjusting unit 1600 in detail, the following drawings are referred to.

FIG. 6 is a perspective view of a top view of a combined state of a terminal and a shape memory alloy wire according to an embodiment of the present invention. FIG.

6, the auto-focus adjusting unit 1600 may include a shape memory alloy wire 1640, a terminal 1660, and a lever 1700. [

A shape memory alloy wire (SMA-Wire) 1640 is an alloy causing thermoelastic transformation, and is an alloy material whose shape changes elastically at a certain temperature.

That is, when the temperature of the shape memory alloy wire 1640 is increased by applying a force to the alloy wire and deformed into another shape, the shape memory alloy wire 1640 stores the initial shape and returns to the shape.

The auto-focus adjusting unit 1600 can control the shrinkage or relaxation of the shape memory alloy wire 1640 by applying a current to the shape memory alloy wire 1640.

For example, when a current is applied to the shape memory alloy wire 1640, a resistance value is lowered and a volume shrinkage phenomenon occurs while the temperature rises. When the current application is canceled, the temperature is lowered and the volume shrinkage phenomenon is stopped and relaxed again. At this time, the terminal 1660 is coupled to both ends of the shape memory alloy wire 1640, respectively, and can apply current.

The terminal 1660 may include a terminal fastening portion 1664 and a crimping portion 1666. At this time, the terminal fastening portion 1664 and the crimping portion 1666 may be integrally formed.

In addition, the terminal fastening portion 1664 can be engaged with the terminal supporting portion 1430 (see Fig. 3).

That is, the terminal fastening portion 1664 can be inserted and coupled to the terminal fastening groove 1435 (see FIG. 3) provided in the terminal supporting portion 1430 (see FIG. 3).

The shape memory alloy wire 1640 is inserted into the crimping portion 1666 so that it can be pressed and fixed so as not to be detached.

The lever 1700 may be inserted into the lever inserting portion 1420 (see FIG. 3). The lever 1700 will be described in more detail with reference to the following drawings.

7 is a perspective view of a lever viewed from above in accordance with an embodiment of the present invention.

7, the lever 1700 may include a lever body portion 1710, a lever fixing portion 1730, a lens barrel supporting portion 1720, and a locking portion 1750. [

The lever body portion 1710 may be inserted into the lever insertion portion 1420 so that the lever 1700 is engaged with the middle case 1400 (see FIG. 3).

3) formed at the lower end of the lever inserting portion 1420 (see Fig. 3), and the lever fixing portion 1730 may protrude symmetrically laterally from the lever body portion 1710, Lt; / RTI >

The lens barrel support portion 1720 can support the lens barrel 1100 (see Fig. 2). The lens barrel supporting portion 1720 may protrude from the lever body portion 1710 such that a pair of lens barrel supporting portions 1720 are symmetrical with respect to the center of the lever body portion 1710.

In addition, since the pair of levers 1700 are provided in the middle case body 1405 (see FIG. 3), four lens barrel supporting portions 1720 are provided to support the lens barrel 1100 (see FIG. 2).

2) is raised in the direction of the upper case 1200 (see Fig. 2), the lens barrel support portion 1720 supports the lens barrel 1100 (see Fig. 2) at four positions can do.

However, the shape of the lens barrel support portion 1720 is not limited to one embodiment, and may be included in the configuration of the lens barrel support portion 1720 if the shape capable of supporting the upward or downward movement of the lever 1700 is included.

For example, the number of the lens barrel supporting portions 1720 may be increased to more stably support the lens barrel 1100 (see FIG. 2).

(Not shown) is provided on the end of the lens barrel supporting portion 1720 so that a slipping phenomenon does not occur at a portion contacting the lens barrel supporting portion 1720 when the lens barrel 1100 (see FIG. 2) You can do it.

The latching portion 1750 is provided at the lower portion of the lever body portion 1710, and the shape memory alloy wire 1640 (see FIG. 2) can be supported.

In order to explain the latching portion 1750 in more detail, the following drawings are referred to.

FIG. 8 is a cross-sectional view taken along the line I-I of FIG. 7 showing an open engaging portion and a closed engaging portion according to an embodiment of the present invention.

As shown in Fig. 8, the engaging portion 1750 may be provided with an open engaging portion 1754 or a closed engaging portion 1756. As shown in Fig.

More specifically, referring to Fig. 8 (a), in the case of the open engaging portion 1754, one side is opened when viewed in section, and referring to Fig. 8 (b) In the case of the latching part 1756, a hole is formed in the latching part 170 so that the wire can be inserted and inserted.

Accordingly, in the process, the open engaging portion 1754 can easily engage the shape memory alloy wire 1640 (see Fig. 2) in comparison with the closed engaging portion 1756. [ In addition, the shape memory alloy wire 1640 can be previously coupled with the open engagement portion 1754 before the automatic focus adjustment portion 1600 (see FIG. 2) is coupled to the middle case 1400 (see FIG. 2) The process can be simplified as compared with the engaging portion 1756.

On the other hand, the closed engaging portion 1756 is stable because there is no risk that the shape memory alloy wire 1640 (see Fig. 2) will come off the open engaging portion 1754.

In order to explain the shape of the projection unit 1780 of the latching portion 1750, the following drawings are referred to.

FIG. 9 is a cross-sectional view illustrating a latching portion provided with a conventional latching portion and a projection according to an embodiment of the present invention.

9, the protrusion unit 1780 may be formed in a portion of the latching portion 1750 that is in contact with the shape memory alloy wire 1640. [

9A, the conventional latching portion 1750 does not include the projection unit 1780, so that the area of the shape memory alloy wire 1640 contacting the latching portion 1750 is smaller than the area It was wide.

9B, a protrusion unit 1780 is formed on the inner side of the latching portion 1750 so that the area of the shape memory alloy wire 1640 contacting the latching portion 1750 can be reduced have.

9C, a column protruding unit 1790 is provided at both lateral ends of the latching portion 1750 so that the area of the shape memory alloy wire 1640 contacting the latching portion 1750 is Can be reduced.

2 to 5, when the current is applied to the terminal 1660, the shrinking force of the shape memory alloy wire 1640 is applied to the elastic portion (not shown) 1150, the locking portion 1750 is pulled toward the center of the middle case 1400.

At this time, the tension of the shape memory alloy wire 1640 can be adjusted while the tension adjusting unit 1450 is moved along the tension adjusting groove 1440.

The lens barrel support portion 1720 is raised in the direction of the upper case 1200 and the lens barrel 1100 that is seated on the lens barrel support portion 1720 also moves upward together with the upper case 1200. [ (1200).

On the other hand, when the application of the current to the terminal 1660 is released, the shape memory alloy wire 1640 is loosened and the restoring force of the elastic portion 1150 becomes greater than the contracting force of the shape memory alloy wire 1640.

That is, the restoring force of the elastic portion 1150 presses the elastic supporting unit 1140 to return the retaining portion 1750 to a position before the shape memory alloy wire 1640 is retracted.

Accordingly, the lens barrel support portion 1720 is lowered in the direction of the lower case 1800, so that the lens barrel 1100, which is seated in the lens barrel support portion 1720, also descends toward the lower case 1800.

As described above, the lens barrel 1100 can be selectively raised or lowered depending on the contractive force of the shape memory alloy wire 1640 and the magnitude of the restoring force of the elastic portion 1150.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

1000: automatic focusing device for camera 1010: upper case fastening groove
1020: Middle case fastening groove 1030: Lower case fastening groove
1100: lens barrel 1140: elastic support unit
1150: elastic part 1200: upper case
1400: Middle case 1405: Middle case body part
1410: lever coupling groove 1420: lever insertion portion
1430: Terminal support portion 1435: Terminal fastening groove
1440: tension adjusting groove 1450: tension adjusting portion
1480: Boundary plate 1600: Auto focus adjustment unit
1640: shape memory alloy wire 1660: terminal
1664: Terminal fastening part 1666:
1700: Lever 1710: Lever body part
1720: lens barrel support part 1730: lever fixing part
1750: engaging portion 1754: open engaging portion
1756: Closed engagement portion 1780:
1790: Column projection unit 1800: Lower case
1810: Fixing projection 1900: Shield cover
1910: Fixing groove

Claims (7)

Lens barrel;
An upper case provided above the lens barrel;
An elastic part having one end supported by the upper case and the other end supported by an elastic supporting unit protruding along the periphery of the lens barrel;
A middle case coupled to the upper case and supporting the lens barrel;
An auto focus adjusting unit coupled to the middle case and adjusting a height of the lens barrel;
A lower case coupled to a lower portion of the middle case; And
And a shield cover which surrounds the upper case, the middle case, the lower case, and is coupled to the lower case,
Wherein the auto focus adjustment unit raises or lowers the lens barrel in accordance with the contraction or relaxation of the shape memory alloy wire.
[2] The apparatus of claim 1,
A middle case body forming an outer shape;
A pair of lever inserting portions installed opposite to the middle case body portion;
A terminal support protruding from an upper surface of the middle case body;
A tension adjusting unit provided on the middle case body to face the terminal supporting unit; And
And a boundary plate disposed inside the middle case and configured to separate the upper case and the lower case from each other.
3. The method of claim 2,
Wherein the tension adjusting unit is coupled to a tension adjusting groove formed to have a predetermined length in the body of the middle case and adjusts the tension of the shape memory alloy wire according to a position of engagement with the tension adjusting groove, Focus device.
The apparatus according to claim 2, wherein the auto-
The shape memory alloy wire being shrunk or relaxed in response to application of an electric current;
A terminal connected to both ends of the shape memory alloy wire and through which current flows; And
And a lever adapted to be coupled to the lever insertion portion.
5. The lever according to claim 4,
A lever body inserted into the lever insertion portion;
A lever fixing portion protruding symmetrically on both sides of the lever body portion and engaged with a lever coupling groove formed at a lower end of the lever insertion portion;
A lens barrel support portion that protrudes symmetrically from the lever body portion and supports the lens barrel; And
And an engaging portion provided at a lower portion of the lever body portion.
6. The method of claim 5,
Wherein the engaging portion is an open engaging portion whose one side is opened when viewed in cross section or a closed engaging portion where a hole is formed and a wire is inserted and inserted.
6. The method of claim 5,
Wherein the engaging portion is formed with a projection unit at a portion in contact with the shape memory alloy wire.

Images