KR101621283B1 - Camera lens assembly - Google Patents

Abstract

According to an aspect of the present invention, A lens barrel provided inside the upper case, the lens barrel having a lens, and a lens barrel holder detachably attached to the lens barrel; An elastic part having one end supported by the upper case and the other end supported by the lens barrel holder; An automatic focus adjustment unit that adjusts the movement of the lens barrel holder and automatically adjusts the focus of the subject; And a lower case coupled to the upper case and supporting the auto-focus adjusting unit, wherein the auto-focus adjusting unit is configured to pivot the transaxle according to contraction or relaxation of the shape memory alloy wire, And the lens barrel holder is moved by pressing the protruding holder protruding unit at a predetermined distance from the outer surface of the barrel holder. The automatic focus adjustment unit is provided between a pair of the transaxles facing each other, Characterized in that the adjusting pin has a tension adjusting groove for supporting the shape memory alloy wire and the tension adjusting groove is formed in an asymmetrical shape along the circumference of the adjusting pin Camera lens assembly.

Description

Camera lens assembly {CAMERA LENS ASSEMBLY}

The present invention relates to a camera lens assembly, and more particularly, to a camera lens assembly configured to enable automatic focus adjustment of a lens.

A camera is an apparatus for photographing an image of a subject. The camera has an analog system for projecting an image captured through a lens onto a film and recording the captured image on an image sensor.

A digital camera can use an image sensor of a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) And is recorded as a photograph through a storage medium such as a card.

The digital camera is mounted on a mobile terminal such as a mobile terminal, a personal digital assistant (PDA), and a tablet PC, so that a user can conveniently photograph a subject.

The camera mounted on the mobile terminal has various functions such as an optical zoom function and an auto focus function. Among them, the auto focus function adjusts the distance between the lens and the image sensor, So as to be projected onto the image plane.

Such an auto focus function adjusts the focus of the lens by selectively moving the lens module provided with the lens. The driving unit for moving the lens module includes a stepping motor that can control a certain angle by a pulse, a piezoelectric motor that drives the piezoelectric ceramic by changing the vibration of the piezoelectric ceramic into a linear motion, And a voice coil motor (Voice Coil Motor) for driving by flowing a current.

However, when the driving unit described above is used, the coupling structure of the driving unit and the lens module is complicated, making camera manufacturing and miniaturization difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a camera lens assembly having a simple structure and capable of adjusting an auto focus of a lens.

According to an aspect of the present invention, there is provided an electronic device comprising: an upper case defining a receiving space therein; A lens barrel provided inside the upper case, the lens barrel having a lens, and a lens barrel holder detachably attached to the lens barrel; An elastic part having one end supported by the upper case and the other end supported by the lens barrel holder; An automatic focus adjustment unit that adjusts the movement of the lens barrel holder and automatically adjusts the focus of the subject; And a lower case coupled to the upper case and supporting the auto-focus adjusting unit, wherein the auto-focus adjusting unit is configured to pivot the transaxle according to contraction or relaxation of the shape memory alloy wire, And the lens barrel holder is moved by pressing the protruding holder protruding unit at a predetermined distance from the outer surface of the barrel holder. The automatic focus adjustment unit is provided between a pair of the transaxles facing each other, Characterized in that the adjusting pin has a tension adjusting groove for supporting the shape memory alloy wire and the tension adjusting groove is formed in an asymmetrical shape along the circumference of the adjusting pin Camera lens assembly.

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 the transaxle guiding the movement path of the shape memory alloy wire and moving the lens barrel holder.

According to an embodiment of the present invention, the lens barrel holder may include a body unit having a hollow hole, the lens barrel being coupled to the lens barrel holder, and an elastic member projecting from an outer surface of the body unit to support the other end of the elastic part, And may include a pair of elastic supporting units having guide holes formed therein.

In one embodiment of the present invention, the transaxle includes: a rotating unit mounted on an upper seating groove formed in the upper case and a lower seating groove formed in the lower case; An outer unit corresponding to a rim of the body unit and supporting the pivot unit; A transfer unit extending from both sides of the outer unit and contacting the holder projection unit to move the lens barrel holder; And a wire support unit provided below the pivoting unit and having a wire insertion groove for supporting the shape memory alloy wire.

According to an embodiment of the present invention, the upper case may include an elastic receiving groove for receiving the elastic portion, and a guide protrusion protruding from the elastic receiving groove and inserted through the elastic portion and the guide hole may be provided It is possible.

In one embodiment of the present invention, the wire support unit may further include a round protrusion unit on the inner side of the wire insertion groove.

In one embodiment of the present invention, the coupling hole formed in the adjustment pin may be eccentric.

According to an embodiment of the present invention, the upper case may further include an engaging portion that surrounds the upper case and includes a fixing protrusion formed on an outer surface of the lower case and a fixing groove to be detachable.

Effects of the camera lens assembly according to the present invention described above will be described as follows.

According to the present invention, the automatic focus adjustment unit selectively moves the lens according to the contraction or relaxation of the shape memory alloy wire. That is, the shape memory alloy wire shrinks or relaxes depending on whether current is applied or not, and the movement of the lens barrel holder is adjusted by rotating the transaxle.

The camera lens assembly using such a shape memory alloy wire has a simple structure, so that the assembly process is easy. Therefore, it is easy to mass-produce.

According to the present invention, the camera lens assembly can be downsized. That is, when the shape memory alloy wire is used instead of the driving unit made of the conventional motor, the number of parts used in the camera lens assembly can be reduced, and the size of the camera can be reduced.

According to the present invention, a wire insertion groove is formed in the wire support unit, so that the shape memory alloy wire can be prevented from deviating.

Further, a round-shaped projection unit is formed inside the wire insertion groove, so that the shape memory alloy wire and the projection unit are point-contacted. Therefore, when the shape memory alloy wire is contracted or relaxed, the transaxle can finely adjust the lens barrel holder through smooth pivoting.

According to the present invention, the tension adjusting groove formed on the adjusting pin has an asymmetrical shape, so that the user can selectively adjust the tension of the shape memory alloy wire.

According to the present invention, the transaxle is seated and supported in the lower seating groove formed in the lower case, and the size of the camera lens assembly can be reduced.

According to the present invention, the lens barrel holder can be stably moved along guide projections provided in the upper case. Thus, the focus of the lens can be finely adjusted.

According to the present invention, in the case where no current is applied to the shape memory alloy wire, the outer shape unit is located in the space between the separated holder projection units, thereby preventing the lens barrel holder from shaking.

According to the present invention, the coupling portion is coupled to the lower case in a state of wrapping the upper case, and the upper case and the lower case can be firmly coupled.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is a perspective view of a camera lens assembly according to an embodiment of the present invention.
2 is an exploded perspective view of a camera lens assembly according to an embodiment of the present invention.
3 is an assembled view illustrating an assembling process of a camera lens assembly according to an embodiment of the present invention.
4 is a perspective view of a transaxle according to an embodiment of the present invention.
5 is a cross-sectional view of I-I of Fig.
6 is a perspective view of an adjustment pin according to another embodiment of the present invention.
7 is an operational state diagram showing operation of a transaxle upon shrinkage or relaxation of a shape memory alloy wire 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 an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements 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 lens assembly according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a camera lens assembly according to an embodiment of the present invention, FIG. 3 is a perspective view of a camera lens according to an embodiment of the present invention, This assembly diagram shows the assembly process of the assembly.

1 to 3, the camera lens assembly 1000 includes an upper case 100, a lens barrel holder 200, a lens barrel 700, an elastic part 300, an auto focus adjustment part 400, And may include a case 500.

The upper case 100 forms a housing space 110 and protects each component provided in the housing space 110 from the outside.

The lens barrel holder 200 is provided inside the upper case 100 and is detachable from the lens barrel 700 equipped with the lens. That is, each lens barrel 700 having different lens specifications can be selectively coupled to the lens barrel holder 200.

For example, a thread is formed on the inner surface of the hollow lens barrel holder 200, a thread corresponding to the inner surface of the lens barrel holder 200 is formed on the outer surface of the lens barrel 700, The lens barrel holder 700 and the lens barrel holder 200 may be screwed together. Alternatively, a hook (not shown) may be formed in the lens barrel 700, and a hole may be formed in the lens barrel holder 200 to receive the hook, so that the lens barrel 700 and the lens barrel holder 200 may be selectively coupled The lens barrel 700 and the lens barrel holder 200 can be combined in various ways.

The lens barrel holder 200 is hollow and the image received through the lens provided in the lens barrel 700 can be projected to an image sensor.

BACKGROUND ART An image sensor is an image pickup device that converts an optical image of a subject into an electric signal and outputs the resultant image. The image sensor includes a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) Can be used. The image of the subject detected by the image sensor is stored as a photograph through a storage medium such as a memory card.

The lens barrel holder 200 may include a body unit 210, an elastic supporting unit 220, and a holder projection unit 230. The body unit 210 forms an outer shape of the lens barrel holder 200, and the lens barrel 700 is coupled to one side.

The elastic supporting unit 220 protrudes from the outer surface of the body unit 210 to support the other end of the elastic part 300. That is, one end of the elastic part 300 is supported by the upper case 100, the other end of the elastic part 300 is supported by the elastic supporting unit 220, and the elastic part 300 Is subjected to elastic deformation.

A guide hole 221 is formed in the elastic supporting unit 220 to guide the moving direction of the lens barrel holder 200. That is, the guide protrusion 130 formed in the upper case 100 is inserted into the guide hole 221, and the lens barrel holder 200 can be moved along the guide protrusion 130.

The elastic support units 220 are provided so as to form a pair, so that the lens barrel holder 200 can be stably moved without tilting.

The holder projection unit 230 protrudes from the outer surface of the body unit 210 and protrudes at a predetermined interval. In this way, the outer unit 432 can be inserted into the space between the holder protruding units 230 protruding while maintaining a predetermined gap.

Thus, when no current is applied to the shape memory alloy wire 410, the external unit 432 is positioned in the space between the holder protruding units 230 spaced apart to prevent the lens barrel holder 200 from shaking.

The holder protrusion unit 230 moves the lens barrel holder 200 by pressing the transfer unit 433 provided on the transom 430. At this time, the lens barrel holder 200 can be stably moved in four places where the holder projection unit 230 and the transfer unit 433 are in contact with each other. Therefore, the automatic focus adjustment can be performed accurately and quickly.

On the other hand, the automatic focus adjustment unit 400 adjusts the distance between the lens and the image sensor so that a clear image of the subject is projected on the image plane of the image sensor. That is, the focus of the subject is automatically adjusted through the movement of the lens barrel holder 200.

The auto-focus adjusting unit 400 may include a shape memory alloy wire 410, a terminal 420, a transaxle 430, and an adjusting pin 440. A shape memory alloy wire 410 is an alloy causing thermoelastic transformation, and is an alloy material whose shape changes elastically at a certain temperature. That is, when the shape memory alloy wire 410 is deformed into a different shape by applying a force to the alloy wire, if the temperature is increased, the first shape is memorized and returned to the shape.

The automatic focus adjustment unit 400 controls the movement of the lens barrel holder 200 by controlling the shrinkage or relaxation of the shape memory alloy wire 410 by applying a current to the shape memory alloy wire 410. That is, by changing the temperature of the shape memory alloy wire 410 by applying a current to the shape memory alloy wire 410, the shape of the shape memory alloy wire 410 is deformed.

For example, the shape memory alloy wire 410 is configured such that when the current is applied, the temperature is increased and contracted, and when the current supply is stopped, the temperature is lowered and relaxed.

The terminals 420 are connected to both ends of the shape memory alloy wire 410 to apply current to the shape memory alloy wire 410.

The trans arm 430 guides the path of the shape memory alloy wire 410 and stably supports the shape memory alloy wire 410. This trans-arm 430 is rotated in accordance with the contraction or relaxation of the shape memory alloy wire 410 and moves the lens barrel holder 200. At this time, the transverse arms 430 are moved in a state of stably supporting the lens barrel holder 200 in a pair so as to face each other.

FIG. 4 is a perspective view of a transaxle according to an embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line I-I of FIG. 4. Referring to FIGS. 4 and 5, ), An outer unit 432, a transfer unit 433, and a wire support unit 434.

The rotating unit 431 is rotated in a state of being seated in a lower seating groove 501 formed in the lower case 500 and an upper seating groove 101 formed in the upper case 100. That is, the transaxle 430 is rotated in a state in which the rotation unit 431 is seated and supported in the seat groove, and the lens barrel holder 200 is moved.

The outer unit 432 forms an outer shape of the transom 430 and has a shape corresponding to the rim of the body unit 210. That is, when no current is applied to the shape memory alloy wire 410, the external unit 432 is positioned in a space between the holder protrusion units 230 spaced apart to prevent the lens barrel holder 200 from shaking. This rotating unit 431 is supported on the outer unit 432 and is provided on the lower side of the outer unit 432. [

The transfer unit 433 extends to both sides of the outer unit 432 and moves the lens barrel holder 200 while contacting the holder protrusion unit 230.

In other words, when the shape memory alloy wire 410 is retracted and the transfer unit 433 is pivoted about the pivoting unit 431, the transfer unit 433 presses the holder pivoting unit 230 and presses the lens barrel holder 200 in the direction of the upper case 100 in which the light beam is incident. At this time, the elastic part 300 supported by the upper case 100 and the elastic supporting unit 220 is in a compressed state.

On the contrary, when the shape memory alloy wire 410 is loosened, the elastic part 300 in the compressed state is restored and presses the elastic supporting unit 220. Accordingly, the transfer unit 433 is rotated on the basis of the rotation unit 431, and the lens barrel holder 200 is moved in the direction of the lower case 500.

On the other hand, the wire support unit 434 extends to the lower portion of the outer unit 432, and the wire insertion grooves 435 are formed to prevent the shape memory alloy wire 410 from being separated and stably supported. The wire insertion groove 435 guides the movement path of the shape memory alloy wire 410.

The wire support unit 434 is positioned in the inner space 510 formed inside the lower case 500 in a state where the rotation unit 431 is seated in the lower seating groove 501. Therefore, the wire supporting unit 434 can be protected from the outside by the lower case 500. [

The shape memory alloy wire 410 supported by the wire support unit 434 and the adjustment pin 440 guiding the movement path of the shape memory alloy wire 410 are positioned in the inner space portion 510, 500). ≪ / RTI >

On the other hand, a protrusion unit 436 may be further provided inside the wire insertion groove 435 for guiding the movement path of the shape memory alloy wire 410. The protrusion unit 436 has a round shape so as to be in point contact with the shape memory alloy wire 410, thereby minimizing the frictional force between the protrusion unit 436 and the shape memory alloy wire 410.

Therefore, fine adjustment of the lens barrel holder 200 can be achieved through smooth rotation of the transom 430 when the shape memory alloy wire 410 is contracted or relaxed. In addition, as the contact area between the shape memory alloy wire 410 and the transaxle 430 is minimized, heat transfer at the contact area can also be minimized. Therefore, the automatic focus adjustment unit 400 can perform accurate and quick auto focus adjustment.

Needless to say, the rising width of the lens barrel holder 200 can be selectively adjusted according to the position of the wire insertion groove 435 and the protruding length of the transfer unit 433 (that is, the thickness of the transfer unit).

Specifically, if the distance to the wire insertion groove 435 is shortened on the basis of the rotation unit 431 and the length protruded to the inside of the transfer unit 433 is increased on the basis of the rotation unit 431, The increase in the height of the substrate 200 can be increased.

That is, as the wire insertion groove 435 is positioned closer to the rotation unit 431, the rotation angle of the rotation unit 431 becomes larger when the shape memory alloy wire 410 contracts. In this case, if the length protruding to the inside of the transfer unit 433 is long, the rise width of the lens barrel holder 200 can be increased.

On the contrary, if the distance to the wire insertion groove 435 is made longer on the basis of the rotation unit 431 and the length protruding to the inside of the transfer unit 433 is shortened on the basis of the rotation unit 431, The rising width of the light source 200 can be reduced.

As described above, the rising width of the lens barrel holder 200 can be selectively adjusted according to the position of the wire insertion groove 435 and the thickness of the transfer unit 433.

6, the adjusting pin 440 is provided between a pair of opposed transaxles 430, and the shape memory alloy wire (not shown) 410).

The adjustment pin 440 has a tension adjustment groove 441 formed along the circumference thereof. The tension adjusting groove 441 guides the movement path of the shape memory alloy wire 410 and stably supports the shape memory alloy wire 410.

At this time, the groove is formed asymmetrically in the tension adjusting groove 441, so that the user can selectively adjust the tension of the shape memory alloy wire 410 through the rotation of the adjusting pin 440. That is, the user adjusts the tension of the shape memory alloy wire 410 through the rotation of the adjustment pin 440, and connects the adjustment pin 440 to the lower case 500 to rotate the shape memory alloy wire 410, In a stable manner.

Alternatively, the tension adjusting groove 441 may be formed as a groove having a uniform shape rather than an asymmetrical groove.

The adjustment pin 440 is formed with a coupling hole 442 to insert the coupling hole 442 into the fixing protrusion 502 protruding from the lower case 500 so that the adjusting pin 440 is coupled to the lower case 500 .

At this time, the coupling hole 442 formed in the adjustment pin 440 may be positioned at the eccentricity of the adjustment pin 440, so that the user can further increase the tension adjustment range of the shape memory alloy wire 410.

FIG. 7 is an operational state view showing the operation of a transaxle when the shape memory alloy wire is contracted or relaxed according to an embodiment of the present invention. FIG. 7 (a) shows a state where a current is applied to the shape memory alloy wire 410 And FIG. 7 (b) shows a state in which no current is applied to the shape memory alloy wire 410.

As shown in FIG. 7 (a), when current is applied to the shape memory alloy wire 410 through the terminal 420, the shape memory alloy wire 410 is contracted. At this time, the shape memory alloy wire 410 presses the projection unit 436 provided inside the wire holding unit 434 together with the contraction.

Next, as the projection unit 436 is pressed, the transaxle 430 rotates. At this time, the transaxle 430 rotates on the basis of the rotation unit 431. That is, the rotation unit 431 rotates in a state of being seated and supported in the lower seating groove 501.

The rotation unit 431 of the trans arm 430 is seated and supported in the lower seating groove 501 formed in the lower case 500 so that the size of the camera lens assembly 1000 can be reduced. That is, a separate structure for projecting from the lower case 500 and supporting the rotation unit 431 is not required, so that the size of the camera lens assembly 1000 can be reduced.

Next, the transfer unit 433 presses the holder protrusion unit 230 and moves the lens barrel holder 200 in the direction of the upper case 100 in which the light beam is incident. At this time, the elastic part 300 supported by the upper case 100 and the elastic supporting unit 220 is in a compressed state.

The transfer unit 433 presses the four holder protruding units 230 protruding from the outer surface of the body unit 210 and applies a uniform force to the lens barrel holder 200 to stably hold the lens barrel holder 200 . The lens barrel holder 200 can be moved in the direction of the upper case 100 along the guide protrusion 130 inserted into the guide hole 221.

In this case, the shrinkage force of the shape memory alloy wire 410 is greater than the elastic force of the elastic portion 300, so that the elastic portion 300 is compressed and the lens barrel holder 200 can be moved toward the upper case 100 .

7 (b) shows a state where the shape memory alloy wire 410 is relaxed, and when the elastic force of the elastic part 300 is greater than the contractive force of the shape memory alloy wire 410, the elastic part 300 is pressed And the elastic supporting unit 220 is pressed to move the lens barrel holder 200 in the direction of the lower case 500.

At this time, the transaxle 430 is rotated on the basis of the rotation unit 431 mounted on the mounting groove, and the lens barrel holder 200 moves in the direction of the lower case 500.

In this way, the lens barrel holder 200 is selectively moved according to the contractive force of the shape memory alloy wire 410 and the magnitude of the elastic force of the elastic part 300.

Referring to FIGS. 2 and 3, the assembling process of the camera lens assembly 1000 will be described. The upper case 100 shown in FIG. 3 is an inverted upper case 100 shown in FIG.

The elastic part 300 is first inserted into the elastic part receiving groove 120 formed in the upper case 100. At this time, the elastic part 300 is inserted into the elastic part receiving groove 120 while being inserted into the guide protrusion 130 of the upper case 100.

Next, a guide hole 221 of the elastic supporting unit 220 is inserted into the guide protrusion 130 into which the elastic part 300 is inserted, and the lens barrel holder 200 to which the lens barrel 700 is coupled is engaged do.

Next, the rotation unit 431 of the trans-arm 430 is seated in the upper seating groove 101 formed in the upper case 100.

Next, the lower case 500 is coupled with the upper case 100. At this time, the lower seating groove 501 formed in the lower case 500 and the upper seating groove 101 formed in the upper case 100 stably support the rotation unit 431.

The upper protrusion member 102 formed on the upper case 100 is bonded to the upper case 100 and the lower case 500 while being inserted into the protrusion insertion groove 503 formed in the lower case 500, Can be firmly coupled.

Next, the shape memory alloy wire 410 to which the terminal 420 is coupled is supported on the wire support unit 434 and the adjustment pin 440 located in the inner space portion 510. At this time, the user can adjust the tension of the shape memory alloy wire 410 through the rotation of the adjustment pin 440 formed with the asymmetric tension adjustment groove 441.

Next, the upper case 100 and the lower case 500 are prevented from being separated from each other through the engagement of the coupling part 600 in a state where the upper case 100 and the lower case 500 are engaged. That is, when the upper case 100 is being wrapped, the engaging portion 600 is coupled to the fixing protrusion 504 protruding from the outer surface of the lower case 500, (500).

As described above, the assembling process of the camera lens assembly 1000 is simple as described above, and automation of the entire process is possible.

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.

100: upper case 130: guide projection
200: lens barrel holder 210: body unit
220: elastic support unit 221: guide hole
230: holder projection unit 300: elastic part
400: automatic focus adjustment unit 410: shape memory alloy wire
430: Transarm 431: Rotating unit
432: Outer unit 433: Feed unit
434: wire support unit 435: wire insertion groove
436: projection unit 440: adjusting pin
441: tension adjusting groove 500: lower case
600: coupling part 1000: camera lens assembly

Claims (8)

An upper case forming a receiving space portion therein;
A lens barrel provided inside the upper case, the lens barrel having a lens, and a lens barrel holder detachably attached to the lens barrel;
An elastic part having one end supported by the upper case and the other end supported by the lens barrel holder;
An automatic focus adjustment unit that adjusts the movement of the lens barrel holder and automatically adjusts the focus of the subject; And
And a lower case coupled to the upper case and supporting the automatic focus adjustment unit,
Wherein the auto focus adjustment unit is configured to rotate the transaxle according to contraction or relaxation of the shape memory alloy wire, the transverse arm pushes the protruding holder protrusion unit at a predetermined distance from the outer surface of the lens barrel holder, Moving the holder,
Wherein the automatic focus adjustment unit includes an adjustment pin provided between a pair of opposed transaxles for adjusting the tension of the shape memory alloy wire, and the adjustment pin is formed by forming a tension adjustment groove for supporting the shape memory alloy wire And wherein the tension adjusting groove has an asymmetrical groove along the circumference of the adjusting pin.
The apparatus according to claim 1, 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
Wherein the shape of the shape memory alloy wire is the same as that of the lens barrel holder.
The lens barrel according to claim 1,
A body unit having a hollow hole formed therein and to which the lens barrel is coupled;
And a pair of elastic supporting units protruding from an outer surface of the body unit to support the other end of the elastic part, wherein the elastic supporting unit has guide holes.
4. The transformer according to claim 3,
A rotating unit mounted in an upper seating groove formed in the upper case and a lower seating groove formed in the lower case;
An outer unit corresponding to a rim of the body unit and supporting the pivot unit;
A transfer unit extending from both sides of the outer unit and contacting the holder projection unit to move the lens barrel holder; And
And a wire supporting unit provided below the rotating unit and having a wire insertion groove for supporting the shape memory alloy wire.
The method of claim 3,
Wherein the upper case includes an elastic portion receiving groove for receiving the elastic portion, and a guide protrusion protruding from the elastic portion receiving groove and inserted through the elastic portion and the guide hole.
5. The method of claim 4,
Wherein the wire supporting unit further comprises a round-shaped projection unit inside the wire insertion groove.
The method according to claim 1,
And a coupling hole formed on the adjustment pin is eccentrically formed.
The method according to claim 1,
The camera lens assembly according to claim 1, further comprising an engaging portion that surrounds the upper case and has a fixing protrusion protruding from an outer surface of the lower case, and a fixing groove that is detachable.

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