TW201044047A - Lens driving device - Google Patents

Abstract

The present invention relates to a lens driving device. The object thereof is to shorten the length of the used shape memory alloy wire. A guide device for guiding a lens holder (18) to move only toward an optical axis (O) direction includes an elastic member (20) configured between the lens holder (18) and a housing (12). The elastic member (20) supports the lens holder (18) so that the lens holder (18) can move only toward the optical axis (O) direction in a state of proceeding alignment to the lens holder (18) in a radial direction. A movement device for moving the lens holder (18) toward the optical axis (O) direction is constituted by a line-shaped shape memory alloy wire (28) arranged around the outer wall of a cylinder part (182) of the lens holder (18) and engaged with the lens holder. The shape memory alloy wire (28) has at least one inflexion point (28-1).

Description

201044047 VI. Description of the Invention: [Technical Field] The present invention relates to a lens driving device, and more particularly to a lens driving device using a shape-recalling alloy in an actuator. [Prior Art] As an actuator for camera autofocus and an actuator for zooming, a (drive device) linear actuator using a shape memory alloy (SMA) is known. For example, Japanese Laid-Open Patent Publication No. Hei 9-127398 (Patent Document 1) discloses a lens driving device having a simple structure. The lens driving device disclosed in Patent Document 1 is provided with a movable lens portion supported by a guide bar and moving between fixed lenses on both sides of the mirror main body in the mirror main body. A spring member is disposed between the movable lens portion and the two fixed lens portions. The at least one spring member is formed as a shape memory alloy spring, and the movement of the movable lens portion is controlled by heating or cooling the spring member. In addition, Japanese Laid-Open Patent Publication No. 2006_98829 (Patent Document 2) discloses a miniaturized lens driving device which can smoothly slide a lens and can be assembled in a portable information terminal device. The lens driving device disclosed in Patent Document 2 has a lens frame (a mirror holder) for protecting a mirror, and a reading device that allows the movement of the needle-shaped support portion in the direction of the wire. Box; and the job can be stretched in the green direction. The job elastics are exposed to the outside of the cylindrical support portion and are arranged concentrically, and include a shape memory alloy spring formed by the micro-age gold formed by the light-changing wire due to the energization/non-energization. . The cylindrical outer peripheral surface of the lens frame (lens scale) is slidably fitted to the inner peripheral surface of the cylindrical support portion. As a general example of the patent document 2, the micro-rotation has a front-rotation spring and a rear-side spring which are arranged in a concentric shape with an optical axis h on the outer side of the support portion. The front bobbin and the rear side coil spring urge the lens frame from the front side and the rear side in the optical axis direction. At least one of the front side yoke spring and the rear side coil spring is formed of a shape memory alloy. [Prior Art Document] [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 9-127398 (paragraph rushing to rush, Fig. 3, 3 201044047 Fig. 4) [Patent Document 2] 曰本特开2006-98829号 (paragraph 0009) 〜0020, Fig. 1 Fig. 5) [Problem to be Solved by the Invention] The lens driving device disclosed in Patent Document 1 and the lens driving device disclosed in Patent Document 2 each have the following problems. In the lens driving device disclosed in Patent Document 1, the movable lens portion is movably supported by the guide bar, that is, the guide device that guides the movable lens portion only in the direction of the guide bar (four). The sulfur vane control can be used to move the direction of the mirror (the direction of the optical axis). Therefore, there is a miscellaneous force on the side between the collet and the guide (sliding surface). For this guiding device, the shape memory alloy spring It is necessary to overcome the force of the county and move the movable lens unit only in the optical axis direction. As a result, it is necessary to use a spring having a large pressing force (driving force) as the shape memory alloy spring. In other words, the memory alloy spring is used. In addition, the above-mentioned county power may sometimes reach a level that hinders the thrust (driving force; pushing force) generated by the shape memory alloy spring. In addition, in the special offer 1, since the memory alloy spring is made into a job, Therefore, the length of the memory alloy wire constituting the shape memory alloy magazine becomes longer. The lens driving device disclosed in the second paragraph 2 is exposed to the outside of the cylindrical branch portion and is placed in the shape of the alloy. Therefore, the longitudinal and horizontal directions of the lens driving device are == 胄 断 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Therefore, the lens frame force is applied. Therefore, the inner peripheral surface of the shape-memory alloy has the same frictional motion as the inner peripheral surface of the shape-supporting alloy: the memory-memory must be made _ force:) 盥...1 The price of the alloy spring is increased. Similarly, in the patent reading 1, in the special offer 2, since the shape memory alloy bomb 4 201044047 is also rotated, the length of the shape memory alloy wire of the shape memory alloy ride becomes longer. The subject of providing The mirror drive device can be used to prevent the lens holder from being held in the direction of the optical axis. The other problem is to provide a lens-driven device. The lens driving device can reduce the aspect ratio without reducing the lens diameter. The object of the invention is to provide a lens driving device which can shorten the length of the shape memory alloy wire used. Ο Ο The other purposes of the month will be more clearly explained with the following explanation. [Devices for Solving the Problem] H (4) The following can be used for the Wei-Jing, which is set to 1G, 1〇A, and to be used. a lens holder 18, 18A for holding the cylindrical portion 182 of the lens barrel 11; a _ _ _, a movable 〇 _ _ I2; a moving device that moves the omnidirectional direction; and a guiding lens holder The optical axis 盥^1) is characterized in that the guiding device comprises a lens holder 18, 18, and a member 2, which is a lens holder 18, 18, which causes the wire contact 18 to be removed. Positioning inspection station Mirror Bao County can only shift to the light = direction, The shifting pure standby configuration is composed of shape memory alloy wires 28, 28, and 28 near the outer wall of the storage (4) hiding portion 182, and the t-shaped 5 gold wires have at least one inflection point 28 - ^ 28 - 4. In the above-described lens driving device 1〇, 1〇A, 1〇B of the present invention, the elastic member 22 holds the frame 18, and the pair of plates on both sides of the optical axis 182 in the direction of the optical axis 182 ί ί circumferential side end portions 222, 242 and outer peripheral side end portions mounted on the outer portion 12. The lens holders 18, 18A may have at least __ protruding portions 184, 186 that are sub-arranged from the cylindrical portion 182 in the radial direction and sub-shaped with the shaped Wei alloy wire. The housing U can hold the actuator bases 14, 14 and the upper side of the lens holder from the upper side minus the structure I. In this case, the lens can be mounted on the bases 14, 14 and the shape memory alloy wires 28, 28α, The first and second electrodes 31, 32, 32Α electrically connected to each other are respectively the first and second electrodes of 28β. In the lens driving device of the first aspect of the invention, the shape memory alloy wire 28 has an inflection point 28-1, and the angle θ of the inflection point 28-1 is less than 9 〇. .

• In the lens driving device 10A of the second aspect of the present invention, the shape memory alloy wire 28A has a plurality of inflection points 28-1 to 28-3, and the angle 02 of each inflection point is less than 45. . In the lens driving device 1A of the third aspect of the present invention, the lens holder 18 has a radially outward direction from the cylindrical portion 182 at a position opposite to each other, and is engaged with the shape memory alloy wire 2 The first and second protrusions 184, 186, the first and second electrodes 3 are respectively arranged to actuate the two ends of the base 14a, and the shape memory alloy wire 28B includes the cylindrical portion 182 along the lens holder. The arcuate portion 28 in which the outer wall is arranged in an arc shape is made. In this case, the shape gold wire 2 has a plurality of inflection points 28-1 to 28-4 'the angles θ3 of the respective inflection points are all τί, ^ 'the name of the county after the upper sense is for understanding _ note, It is just an example, and is not limited to this. [Effect of the Invention] According to the present invention, in the case where the lens holder is placed in the state in which the lens holder is positioned by the lens holder =====, the lens collar is slid relative to other members, The linear shape of the snap fit ======= The vertical and horizontal dimensions: = The shortening of the _shipling alloy city ageing gold surface, so that the following description of the present invention will be described with reference to the accompanying drawings. Implementation. The present invention will be described with reference to Figs. 1 to 4 in which the lens driving device 10 is viewed from the upper side of the obliquely front side. Fig. 1 The reading of the lens barrel U from the state and the bottom. W 2 is a perspective view of the lens driving device 1A viewed from above the J side. Fig. 3 6 201044047 is a perspective view of the lens driving device 10 as seen from above the obliquely front side in a state where the lens barrel u and the upper side cover 16 are omitted. Fig. 4 is an exploded perspective view of the lens driving device 1A viewed from above the obliquely front side in a state in which the lens barrel 省略 is omitted. • Here, as shown in Figures 1 to 4, a Cartesian coordinate system (X, γ, ζ) is used. In the state shown in Fig. 1. to Fig. 4, in the rectangular coordinate system (X, Υ, Ζ), the Χ axis direction is the front-rear direction (depth direction), and the γ-axis direction is the left-right direction (width direction), the ζ axis The direction is the up and down direction (height direction) 曰. In the example shown in FIGS. 1 to 4, the vertical direction Ζ is the optical axis 〇 direction of the lens. However, in the actual use, the optical axis 〇 direction, that is, the y-axis direction, in other words, the upper direction of the J-axis is the front direction, and the lower direction of the ζ-axis is the rear direction. The automatic poly-Laurer camera mobile phone 10 includes a lens mirror (lens assembly) u having a built-in autofocus lens muscle as a movable lens. The lens driving device 10 is for moving the Wei barrel u only in the direction. As shown in Fig. 1, the extension driving device 10 has a Z frame (fine) 12 covering the lens barrel u. In other words, the paving (limb) 12-spindle mirror g body frame (housing) 12 includes an actuator base 14 and an upper side cover 16. On the other hand, 'not shown' but in the center of the actuating H-base 4: the pair of image-wise image sensors that are imaged by the movable lens ), the complementary metal oxide 2 metal oxide semiccnduct 〇r) o (CM〇S'C〇*entary lens driving device 10 includes a lens portion 182 that holds the lens mirror lens barrel η-maintained and fixed to the lens holder 18°, and includes a large iliac crest. 'The lens holder 18 is turned on the wall with a female thread (not _. The outer circumference of the other cylindrical case has a male thread (illustrated) with the above-mentioned female thread threaded on the outer peripheral wall of the lens 1 on the lens holder 18 By arranging the lens barrels and screwing them along the optical axis, the racks 18 are twisted around the optical axis, and then bonded together by a bonding agent or the like. 'R 11 纳纳 in the lens holder The lens holder 18 is cut into the optical axis 〇 direction 7 201044047 in the outer casing 12 as will be described later. The lens barrel and the lens are in the thin _ 18 μ. The protrusion 184 has a shape memory in front of the other direction X. The portion of the wire 28 is used for the linear actuator base 14 to be described later, and has four projection lens driving devices 10 that protrude above the four projections 142, respectively. There are four protruding coffees for setting the dog's dog. The two sides of the pair of leaf springs 22, 24 - the brothers = the optical axis of the cylindrical portion 182 of the frame 18 ο between the outer casing I2, and as a supporting lens Maintain Wei 22 24 configuration in the lens holder I8 and positioning recorded Wei Yule 18 can call ^^ the job profile 18. - On the leaf spring 22, 24 +, a complete 4. * Displacement of the elastic parts The spring 24 is referred to as a lower side leaf spring. The reverse spring 22 is referred to as an upper side plate, and the other plate is 'as described above. In the actual use condition, the upper direction becomes the front direction, and the Z axis direction (the optical axis axis) The upper side plate magazine 22 in the direction (the wire direction) is also referred to as the front side elastic crystal, and the direction in the lower direction j is the rear direction. Therefore, the upper side leaf spring 22 is disposed in the transparent side, which is also referred to as a rear side spring. t Μ is disposed on the upper side of the optical auxiliary direction of the frame of the lens holder, and the lower side plate spring 24 is formed substantially The structure of _ is the lower side of the axis 0 direction. The upper side plate spring 22 and the lower side plate

G is disposed between the inner peripheral side end portion 222 and the end portion 224 of the outer casing 12 as will be described later. Three arms ♦ each end 22 and the outer peripheral side are further provided, and the inner end portion is also referred to as an upper side leaf spring 22 The inner peripheral side end is called the outer ring. In the second aspect, the outer peripheral side end portion 224 of the upper side leaf spring 22 has a cylindrical portion 182. The dog is out of section 142. The outer peripheral side ends are respectively flagged into the holes 224a in the four holes 224a of the four corners of the four-corner base 14. As shown in FIG. 3, four protrusions formed on the four protruding pieces are fitted to the outer peripheral side end portion 244 of the actuator base at 8 201044047, which are held by the leaf spring holder 26 and fixed to the board. The outer peripheral side end portion 244 of the bullet is fixed to the bottom surface side of the lens holder 18 by the clip side end portion 242. The inner circumference of the lower side leaf spring 24 is constituted by the pair of plate springs 22 and 24, and the rotating member (4) can be moved in the direction of the optical axis 0. Copper, scaly bronze and other components. 9 卞 Use the keys of the board to turn 22, 24 to draw light. The lens movable portions 11, 18 can be made with respect to the housing (casing) 12, and the lens driving device 1 has the first and second electrodes 3 J, 32 electrically connected to the lens first W 28a and 28b of the lens. . The other side is described with reference to Fig. 3 and Fig. 4; Fig. 5L is a front view showing the lens drive j device 10 shown in Fig. 5 in an enlarged manner for the shape memory alloy wire (4). Figure 6 is a partially enlarged perspective view of the 4^(4)^卩. The Wei ΐ 26^^ has an annular portion 262 which is formed into a substantially annular shape. In the front and rear directions of the paste 262, a groove is formed in the front portion to say that there is a close to the 234 and the up and down direction of the ζ 钱 (4) protruding holder 26, on the other hand, on the actuator base 14, in the above groove 2 ^ 144 The electrode 3 is extended in the up and down direction Z, but the second electrode % is longer than the first electrode 3. As shown in Fig. 6, the 'electrode (four) actuator base (four) is electrically connected: the groove 264 of the edge plate spring holder 26 is erected. On the other hand, the second ‘very chic

The second groove 146 of the Si two is fixed and held at the protrusion of the leaf spring holder 26 = 6 'the first electrode 31 has a bent portion at its upper end portion, and the word is similarly, the second electrode 32 has a first connecting portion 322 having a folded-in cross section at the upper end portion thereof, and the first electrode portion 31 is electrically connected to the first end portion 28a of the wire connecting wire 28 of the first connecting portion 312. The second electrode % Shanta-link 2 is riveted to be connected to the second end of the shape memory alloy wire 28, 201044047. Thus, the shape memory alloy wire 28 is in contact with the first and second electrodes. 3l, mounted on the actuator base 14 in a state of phantom connection. • The shape memory alloy wire 28 has a first straight portion 281 extending from the left side of the first connecting portion 312 of the first electrode 31; and a second electrode A second straight portion 282 of the second connecting portion milk 32 extending to the left in the left-right direction Y: and a connecting portion 283 connecting the second and second straight portions 282. The knife, in the illustrated example, the 'connecting portion 283 substantially The upper portion has a linear shape. The protrusion 184 of the lens holder IS is shaped. Recall that the joint between the alloy 〇 and the joint _ has an inflection point (return point) 28 - 丨 the opposite straight == point) 28 - 1 angle Θ 1 is less than 90. (口折知' _ "Mixed fiber "Alloy" means that the area with the pre-administration & degree becomes zero and returns to its original shape.

Made of TiNi alloy. (4) (4) Open > Shape reading alloy is used, for example. Attached to the 2 line is produced along the light pumping. The direction of pressing the lens holder 18 downward is made by: _ circuit (not shown) is turned on, and the mouth is transferred to the upper side. The brother version borrows 20 downward pressure and along the 〇 '- recalls the alloy wire 28 shrinks. The fruit is Μ ° The pressure under the ox is the shape of the shape, and the shape is recorded as follows: It can be used as a mirror movable portion of the material 28, and (20, 28) functions as a lens actuator of the magnetic lens movable portions 11, 18, and the lens is movable and the lens is movable. The portion 11 is opposite to the light, and the first embodiment is a light-receiving member 2S. When the other member is slid, the lens holder 18 is moved only in the direction of the optical axis. • The shape-reading alloy wire 28 is disposed near the outer wall of the cylindrical portion 182 of the lens holder 18. Therefore, it is possible to reduce the lens-operated 1G without reducing the lens diameter of the autofocus lens AFL as the movable lens. The size of the bet. As a result, the diameter of the lens from the hidden mirror muscle can be increased to cope with a high resolution camera. In addition, as a mobile device, since the shape of the line gi.lt alloy wire 28' having at least one anti-ship (back-off point 28) is used, the shape is retracted compared with the spiral shape-memory alloy spring. The overall length of the alloy wire 28. As a result, the lens driving device 1 can be miniaturized. The shape restoring force of the shape memory alloy wire 28 can be increased by increasing the angle Θ1 ' of the third-order _ (folding point) 28_丨. As a result, the lens thrust of the lens driving device 1 can be increased. Further, the other straight portions 281, 282, and 283 have little effect on the driving, since the generated portion is only the portion of the inflection point (back vertices) 28-1 of the shape memory alloy wire 28. A lens driving device 1A according to a second embodiment of the present invention will be described with reference to Figs. 7 and 8. Fig. 7 is a perspective view of the lens driving device 10A as viewed from above in the obliquely forward state in a state where the lens barrel u and the upper side cover 16 are omitted. Figure 8 is a front elevational view of the lens driving device i 〇 a Q shown in Figure 7 . The lens driving device 10A shown in the figure has the same structure as that of the lens-operated device 1G shown in Fig. 6 except that the linear shape memory alloy wire has a structure different from that described later, and operates. Therefore, the shape memory alloy wire is denoted by reference numeral 28A. The same components as those of the lens driving device 10 are denoted by the same reference numerals, and the description thereof will be omitted. Only the differences will be described below. The shape memory alloy wire 28A has the same structure as the shape memory alloy wire 28 shown in FIGS. 3 to 6 except that the structure of the joint portion is different as described later. Therefore, the reference symbol of 283A is attached to the connecting portion. The connecting portion 283A is substantially S-shaped. In detail, the connecting portion 283A includes a first connecting straight portion extending obliquely from the front end portion of the first straight portion 281 to the upper right side, and a second connecting straight portion extending from the front end portion of the 11 201044047 to the lower left oblique portion and the connection P The recording portion 283A1 and the second connecting straight portion 283 are connected. A lens holder (four) is protruded in the second connecting straight portion 283A2

Jl Ο^τ shape memory alloy wire 28Α has: a second recurve at the first straight portion = 〖=-recurve point (inflection point) Μ; a connection portion between the first knife 283Α1 and the red connecting straight portion 3 Point (3) break point ^ -2 ; and record the second connecting straight line portion 283Α2 and the third inflection point (folding point) 28-3 of the third connecting portion. The first to third recursive = Ο 〜 ~ 28-3 angles Θ 2 are less than 45. ^; The motion and the blanking are performed in accordance with the above-described first-real-life type lens driving device, and the description of the operation thereof is omitted. The lens holder 18 supports the lens movable portion I, 18 so that it can be along the wire due to the temperature change caused by the energization/non-energization of the ray material 向 to the 〇 邛 邛 20 20 and the shape alloy wire 28A The 0-direction axis, _ is used as the lens moving parts 20 and 28A. As shown in Fig. 8, the lens driving units 2, 28 and the lens movable portions, a are arranged side by side with respect to the optical axis 。. Therefore, the lens driving device can be made low in height. The lens driving device according to the second embodiment described above has the following effects. In the case where the elastic member frame 18 is disposed between the lens holder 18 and the outer casing 12, the lens is secured by the arrangement of the shape memory alloy wire (10) A in the cylindrical portion 182 of the lens holder 18. Near the outside, the eyeglasses are not shot out. The wire can reduce the vertical and horizontal dimensions of the lens drive. This = the lens diameter is increased to accommodate high resolution cameras. In addition, as a mobile device, the second recurve of the shape of the shape memory alloy with the first 28-1 to 28-3 is used (the turning point). The wire 28A can shorten the overall length of the shape memory alloy wire 28A as compared with the spiral shape memory 12 201044047 alloy spring. As a result, the lens driving device 10A can be miniaturized. The shape restoring force of the shape memory alloy wire 28A can be increased by increasing the angles Θ2 of the first to third inflection points (folding points) 28-1 to 28-3. As a result, the lens thrust of the lens driving device 10A can be improved. Further, since the shape memory alloy wire 28 has three inflection points (inflection points) 28 - 1 to 28 - 3 , the thrust at the time of focusing of the lens can be increased.

A lens driving device 1A according to a third embodiment of the present invention will be described with reference to Figs. 9 to 12 . Fig. 9 is a perspective view of the lens driving device Na as seen from the upper side of the oblique front side in a state where the lens barrel 丨丨 and the upper side cover 16 are omitted. Fig. 1G is a perspective view of the lens driving device 1GB shown in Fig. 9 as viewed from the upper side obliquely rearward. Fig. 11 is a front view of the lens driving device shown in Fig. 9. Fig. 12 is a perspective view showing the arrangement of a lens holder, a shape memory alloy wire, and a pair of electrodes of the lens driving device 10B shown in Fig. 9 . The illustrated lens driving device 10B has a structure in which the linear shape memory alloy wire, the actuator base, the leaf spring holder, the second electrode, and the lens holder are different as described later. The operation is the same as the configuration of the lens driving device 1 () shown in Fig. 6 . Therefore, for the shape memory alloy wire, the base, the plate magazine retention_, the second electrode, and the lens holder reference numerals 28B, 14A, 26a, 32a, for the structural elements of the lens driving device 1G The structural elements are labeled, and the description thereof will be omitted. Only the differences will be described below. First, the mounting state of the shape memory alloy wire 28B will be described. The plate magazine holder 26A has a second groove 266A to take the protrusion %

It has the same structure as the leaf spring holder 26. The rear portion of the second groove 266A / H portion 262 in the front-rear direction X. _ υ is not in the same structure as the base of the actuator that is different from the portion in which the second groove is formed. Therefore, the second groove is marked with ten :: 2 Κ) the second groove 26 of the rear groove holder 26 χ in the front-rear direction of the actuator base 14 is indicated to correspond to the corresponding position. The second electrode 32 of the wire "plate" has a length and a configuration portion different from the second electrode % 32 Α having a length _ length with the first electrode 31. As shown in the figure, the back surface of the electrode thief base is used, and the actuator base is used. 14 Α second groove 146α _ 'and along the plate = 13 201044047 The second groove 266 of the holder 26 Α is disposed. The second electrode 32 具有 has a second connecting portion 322 折 bent at its upper end in a zigzag shape. 31 is electrically connected to the first end portion of the shape memory alloy wire 28A by caulking the first connecting portion 312. Similarly, the 'second electrode 32' is joined to the shape memory alloy wire 28 by riveting the second connecting portion 322. The second end portion is electrically connected. The sample memory alloy wire 28 is mounted on the actuator base 14A in a state of being electrically connected to the first and second electrodes 31, 32. The lens holder 18 is removed. In addition to this point of the second protrusion 186, it has the same structure as the lens holder 18. Here, the protrusion 184 is also referred to as a first protrusion. As shown in the figure: Part 186 is behind the front and rear direction X The outer peripheral wall of the cylindrical portion 182 of the lens holder 18A is protruded outward in the radial direction. The second protruding portion 186 is also engaged with the linear shape memory alloy wire 28A as described above. Shape memory alloy wire 28Β The structure has the same structure as the shape memory alloy wire 28 shown in FIGS. 3 to 6 except that the structure of the second straight portion and the connecting portion has different points. Therefore, the second straight portion and the connecting portion are respectively labeled Reference numerals of 282α and 283β. As shown in Fig. 10, the rear side of the lens driving device 〇β extends from the second connecting portion 322 of the first electrode 32A to the left in the left-right direction γ. The cylindrical portion (8) of the lens holder 18A includes: from the first straight portion 281: = ΪΓ 283Β1; from the front end portion of the second straight portion 282A to the obliquely upper right direction; and the first connecting straight line is connected in an arc shape Part of the coffee and the thin face are partially thin. The arc-shaped portion of the 283Β3 engaging lens holder has the first and second projections 184 and the knives. The knife shape memory alloy wire 28 has: the first straight line portion 28i and the first One Partially fine! The connection touches the first - the inflection point (return point) 烈 丨 · 录 录 $ 分 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = The connection is slightly fourth inflection point (turning point) 28_4. The first to fourth recurve points 28-1~28-4 are less than 90 degrees. '(Folding 201044047 moving device ίο the same乍The explanation of the operation of the lens drive with the above-described first embodiment is omitted. The temperature change occurs when the temperature is recorded. , ''moving device 18' moving to the optical axis 0 direction of the moving device 18 可 可 合金 骑 骑 骑 骑 骑 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 捕 可 可 可 可 可Lens of the movable part 1 ο ^ 20'28 Β 11' ΐ 8 Α upper ΐ ϋ ϋ 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜 透镜Moving the optical axis to the optical axis ", - Since the shape memory alloy wire 28Β is arranged to read only 10, it is not necessary to reduce the lens diameter of _ to increase the optical focus lens The mobile device has a shape-memory type with a shape-memory type of shape-memory alloy wire having a first-to-fine recurve point (the memory alloy wire 28B, a of the folded-back sister 4H), and as a result, the lens can be made transparent. The angle Θ3 of the first to fourth inflection points (folding points) 28-1 to 28-4 is increased, that is, the shape restoring force of the shape memory alloy wire 28Β is increased. As a result, the lens can be improved. 10 Β lens thrust. In addition, due to shape memory alloy The material 28β has four inflection points (inflection points) 28-1 to 28-4, so that the thrust at the time of focusing the lens can be increased. #二二1! The present invention is carried out by the preferred embodiment, but For example, the above-mentioned real parts may be formed by plates (four) provided on both sides of the cylindrical portion of the lens holder in the optical axis direction, but are not limited to Therefore, any structure can be used as long as the lens holder can be guided without sliding the lens holder relative to the other member 15 201044047. [Simplified illustration] The first embodiment of the present invention is viewed from the front side. The lens driver shown in the appearance of the lens driving device is abbreviated from the lens barrel and viewed from the upper side of the oblique front. FIG. 3 is a perspective view from the lens driving device shown in FIG. 2; 4 is an exploded view from the upper side of the oblique front _ 2, and the exploded view of the lens is shown in FIG. 3; FIG. 6 is a front view of the lens driving device shown in FIG. 3; Partial magnification of the main part of the illustrated lens drive 7 is a perspective view of the lens driving device of the second embodiment from the above, in which the lens and the upper woven plate are omitted; FIG. 8 is a front view of the lens driving device shown in FIG. 7; 9 is a perspective view of the lens driving device according to the third embodiment of the present invention viewed from above the obliquely front side in a state where the lens barrel and the upper side cover are omitted; FIG. 1A is a view from above of the obliquely rear side as viewed from FIG. FIG. 12 is a front view of the lens driving device shown in FIG. 9; and FIG. 12 is a lens holder, a shape memory alloy wire, and a pair of electrodes showing the transmissive device shown in FIG. A perspective view of the configuration. [Main component symbol description] 10, 10A, 10B lens driving device 11 Lens barrel (lens assembly) 12 Frame (housing) 16 Upper side cover 14, 14A actuator base 26, 26A Leaf spring holder 142 Projection portion 262 Annular portion 142a Protrusion 264 Slot 144 First groove 266 Projection 18, 18A Lens holder 146, 146A, 266A Second groove 16 201044047 182 Cylindrical portion 184, 186 Projection 20 Elastic member 28a First end portion 281 First straight line Part 28-1 to 28-4 inflection point (folding point) 282, 282A second straight line portion 28b Second end portion 28, 28A, 28B shape memory alloy wires 283, 283A, 28 commit connection portion 283A 283B1 first connection Linear portion Ο 22'24 222 224 224a 242 244 Leaf spring inner peripheral side end outer peripheral side end hole inner peripheral side end outer peripheral side end portion Θ1, Θ2, Θ3 angle of inflection point 0 lens optical axis 283Α2, 28狃2 second connecting straight portion 283 Α 3 third connecting straight portion 28383 connecting circular arc portion 31 first electrode 312 first connecting portion 32, 32 Α second electrode 322, 322 Α second connecting portion autofocus lens

AFL

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Claims (1)

201044047 VII. Application for Patent Park: 1. A lens crane device comprising: a lens holder having a cylindrical portion for holding a lens barrel; supporting the lens holder such that the lens holder can only move in the optical axis direction a housing, a moving device that moves the lens holder in the optical axis direction; and a guiding device that guides the lens holder to move only in the optical axis direction, wherein the guiding device includes The elastic portion between the contact holders of the wearer's age holders is attached to the above-mentioned optical axis. The lens holder can only be displaced in the direction of the optical axis in the state where the lens holder is positioned in the direction of the lens holder. Ο Ο The moving device is composed of a juvenile aged money material disposed near the outer wall of the cylindrical portion of the lens holder and the lens holder is engaged with the disk holder, and the female shape material has at least one Recurve point. 2. The lens driving device according to claim 1, wherein the ship elastic member is disposed in a green direction of the tubular portion of the Wei simple frame, and the two-to-plate elastic f constitutes each of the aforementioned - the dragon (four) There is an inner peripheral side end portion mounted on the lens and an outer peripheral side end portion mounted on the outer casing. The lens driving device according to claim 1 or 2, wherein the mirror holder has at least a radial direction protruding from the cylindrical portion, and at least the memory alloy wire is engaged. a protruding part. The lens driving device of claim 3, wherein the outer casing has an upper side cover disposed on a side of the lower portion of the body to cover the lens holder, and has And first and second electrodes fixed to the actuator base and electrically connected to one end of the shape memory alloy wire. 5. The lenticular device of claim 4, wherein the shape memory alloy wire has an inflection point, the angle of the inflection point being less than a step. 6. The lens driving device of claim 4, wherein the shape memory alloy wire has a plurality of inflection points, and the angles of the respective inflection points are smaller than you. 7. The lens driving device according to claim 4, wherein the lens holder has a half-side projecting from the cylindrical portion at a position opposite to each other, and the shape memory alloy wire card First and second protruding portions, outwardly 18 201044047, the first and second electrode systems are respectively disposed at two ends of the actuator base, and the shape memory alloy wire comprises the lens holder The outer wall of the tubular portion has an arcuate portion arranged in an arc shape. 8. The lens driving device of claim 7, wherein the shape memory alloy wire has a plurality of inflection points, each of which has an angle of less than 90°. 19