TW201229608A - Lens driving device - Google Patents

Abstract

The present invention provides a lens driving device for reducing inclination angle of a lens during shooting. In the lens driving device of this invention, a front spring (22) and a rear spring (24) disposed respectively at the front and rear sides of the optical axis (O) of a lens holder (14), each comprises: inner peripheral ends (222, 242) installed on the lens holder (14); outer peripheral ends (224, 244) installed on the fixing parts (12, 18, 20, 28); and two arms (226, 246) connecting the inner peripheral ends and the outer peripheral ends. The direction having a maximal spring coefficient among the circumferential directions of the plane where the front spring (22) and the optical axis (O) are orthogonal and the direction having a maximal spring coefficient among the circumferential directions of the plane where the rear spring (24) and the optical axis (O) are orthogonal have an included angle less than 45 degrees.

Description

201229608 VI. Description of the Invention: [Technical Field of the Invention] = The lens drive device, in particular, is capable of moving the lens holder (movable portion) of the member (lens barrel) in the optical axis direction of the lens. Lens drive device. [Prior Art] A mobile phone with a camera is equipped with a compact camera. Use the automatic hard-to-use lens_device on the J-small machine. Various focusing lens driving devices have been used. As such a lens drive/transfer source (_method), a VCM method using a voice coil motor is known. In the VCM type lens driving device, a magnetic k-mirror driving device including __ and a magnetic permanent magnet is also referred to as a driver.逍 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Relatively acid retains a long-lasting magnet. Magnetically purely contains a permanent magnetic clock on the (four) surface, ^, Shleld yoke, and a relative _ (BaekyGke) in the middle of the drive coil. The magnetic circuit formed by the permanent magnet and the base portion _ are provided as a fixed portion=r-mei side-to-plate 箸.- In the state where the plate phthalocyanine is in the position of the optical axis, it can be displaced in the optical axis direction. The second movable portion has a gap between the magnetic circuit (fixed portion) and is displaceable in the optical axis direction. The lower one of the pair of leaf springs is yellow. However, the one side is called the upper side plate. The other side is called in the continuous use condition, since the optical axis direction is 4/26 201229608. This spring is also called the front sagas, and the lower side sapphire side plates: (rear side springs) are substantially the same shape with each other. Literature (patent literature)

For example, 'Patent Document 丨 (Japanese Patent Laid-Open is as follows); A rear side spring is used by the mounting side: the front side spring and the outer peripheral side end portion of the fixed portion can be described, and the inner circumference of ° The side end portion and the inner and outer peripheral end portions of the three shank portions (arm portions) that are attached to the solid are disposed in the circumferential direction of each of the stem portions (arm portions) of the phase and the spring, and the patent document is patented. 2 (JP-A-2008-26619) The first two rods (arms) of the lens driving device at 82 °, each of the rods (arms, two: two, and patent document 3) The position is orthogonal to each other. A lens driving device is disclosed in the following: ':: 008-139811. The male member includes: a connecting portion having a spring engaging portion and being connected to the moving lens body. The outer side of the limb (fixed portion) == part and the outer side: J part two is composed of two, the magazine member is opened as follows, the arm member, the first spring member and the second spring member and the second spring Direction of the structure. ,,,,,,,,,,,,,,,,,,,, Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Patent Document No. 3, Japanese Patent Application Laid-Open No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Since it is required to be miniaturized, it is necessary to reduce the number of constituent members of the autofocus lens driving device. Due to such miniaturization, the permanent magnet as a constituent member is miniaturized, and thus the permanent magnet is used. The generated magnetic force (magnetic field) is also weakened (smaller). Although the plate spring element is also miniaturized, the number of the arm (rod) is more than one, and the spring balance becomes powerful). In order to make the elastic teaching weaker (the size of the slab (spring member) is also considered to be small, there is a limit to this. As a result, as disclosed in the above Patent Document 3, in order to weaken the magazine constant ( In the lens driving device, the lens unit is composed of two plates. The actual use of the compact camera is as described above (in the direction of the optical axis (the direction of the lens focus). In the state of the front and rear Lu), shooting is performed. Therefore, when shooting, the upper side (the other part) is placed before the lens holder (movable part), and the lower side 3 (rear side is yellow) is placed in the lens. Before the frame (movable part). The material is set to two conditions τ, and the second side of the patent and the back side material are arranged at the positions where the arms are orthogonal to each other. The member (rear side spring) and the second elastic structure 6/26 201229608 piece U-side spring are arranged in the direction of the angular position offset by 9〇. = Yes 'If the number of arms is set to two, the board Spring (elasticity: the direction of rotation of the surface orthogonal to the optical axis) and = number Therefore, in the arrangement of the two-dimensional elastic member disclosed in Patent Document 2 and Patent Document 3, the circumferential direction of the front side spring (second spring member) is the maximum value and the rear side spring (first) The direction in which the spring constant is the maximum value is orthogonal to each other (offset %0). When the right spring constant is large, the displacement of the leaf spring becomes small, and if the phthalocyanine is moved, the displacement becomes large, and therefore Patent Document 2 and Patent Document 3 In the arrangement of the plate yellow (spring member) disclosed, the inclination angle of the lens moving portion at the time of the above-described photographing becomes large. In other words, the object of the lens is not greedy in the direction of the optical axis (the (4) arbitrary rotation amount (circumferential direction). [Invention] Therefore, an object of the present invention is to provide a photographing time. A lens driving device in which the tilt angle of the lens is reduced. Another object of the present invention is to provide a lens driving device capable of reducing the tilt angle of a lens during shooting over a wide range of angles. The lens driving device 10 according to the aspect of the present invention is a lens driving device capable of adjusting the position of the lens element in the optical axis direction, and includes a lens holder 14 that holds the lens unit. An annular drive coil 16 fixed in a manner around the lens holder; a fixing portion including a permanent magnet 18 opposite to the drive coil, and a magnetic surface holding the permanent magnet and the lens holder a front side spring 22 on the front side of the optical axis 0 direction; and a rear side spring 24 provided on the rear side of the optical axis 0 direction of the lens holder, the lens 7/26 201229608 driving device The upper side includes: money on the above-mentioned through-material (4) / the rear side spring Μ The direction in which the constant mounted on the fixed portion is the maximum value, and the above-mentioned rear: bomb: yellow in two == set: 'The best system is the abstract. The soil is above the angle. The upper ugly arm 226, 246 can be set along the circumference. - The upper cedar mouth is not ^, ^ reference symbol is for easy understanding In the present invention, the effect of the present invention is as follows: In the present invention, the number of the springs 4 in the circumferential direction of the plane orthogonal to the optical axis of the front side spring is the maximum value, The angle between the direction of the rear side spring and the optical axis orthogonal to the optical axis in the circumferential direction of the plane is set to be within 45 degrees, so that the tilt angle of the lens at the time of shooting can be reduced. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a view showing a lens driving farm 10 according to an embodiment of the present invention. Fig. 1 is an exploded perspective view of the lens driving device 10. Figure 1 shows the use of positive The coordinate system (χ, γ, ζ).

In the state where 8/26 S 1 is not present, in the orthogonal coordinate system (Χ, Υ, Ζ), the X-axis direction is the front 201229608 (depth direction)' The 丫-axis direction is the left-right direction (width direction), z °疋Direction (height direction). Further, in the example shown in Fig. 1, upper and lower, ζ is the optical axis 0 direction (focus direction). In the continuous use situation, the optical axis 〇 direction (focus direction), that is, the Ζ axis direction becomes the front-rear direction. In other words, the upper direction of the x-axis becomes the front direction, and the lower direction of the x-axis becomes the rear direction. The illustrated lens driving device 10 is equipped with a portable mobile phone capable of automatically focusing. The lens driving device 1G inspects the lens element (transparent cylinder) (not shown in Fig. 7Γ〇 in the optical axis Q direction (focus direction). Therefore, the optical drive shaft. The lens driving device 1 is referred to as a driver. Lens driving The rupture 10 has a driver base 12 disposed on the lower side (rear side) in the x-axis direction (optical axis 〇 direction). Although not shown in FIG. #, the H (rear) of the driver base is mounted on the sensing 11 The photographic element on the substrate. The photographic image is imaged by the lens 70 and is converted into an electric k. The photographic element is image-sensed by, for example, a CCD (charge c〇upied device) type image. CMOS (Xia-entai, y metal = e sermeonduetoi ^ Complementary gold dodge) (4) Image sensing " 'constituting gj this" through the split lens drive device sensor substrate, photographic components constitute a photographic module. Crane device 1G: a sample 140 having a (four) (four) lens element (the same lens) _ grease lens holder 14; a drive coil 16 positioned on the lens frame 刚 just around the cylindrical portion; a permanent magnet 18 in which the f-coil is oppositely disposed; The tubular portion 140 of the magnetic mirror element 14 of the permanent magnet 18 is mounted on both sides of the optical axis 0 direction of the cylindrical portion 140. The magnetic permanent magnet 18 and the magnetic cymbal 2 〇 constitute a magnetic circuit. Optical axis square 9/26 201229608 ^Displacement mode branch #Lens element] 4. - The pair of plate springs 22, 24 - 22 are called upper side leaf springs, and the other leaf spring 24 is called lower side plate In the actual use of red 1 in the mobile phone with the camera, the upper direction of the 'axis direction (the direction of the optical axis 0) becomes the front direction, and the lower direction of the 轴 axis ^ direction (the direction of the light vehicle from the Ο direction) Therefore, the upper side 22 is also referred to as the front side spring, and the lower side board f 24 is called the rear side 'W" 〇 upper side leaf spring (front side magazine) 22 and lower side leaf spring (rear side magazine) 24 cases are formed of metal such as stainless steel or beryllium bronze. Moreover, the upper leaf spring (front side spring) 22 and the lower side plate (rear side spring) 24 are subjected to press working on a predetermined thin plate or etching by photolithography. It is processed and manufactured. The etching process is more ideal than the press processing. The reason is that the etching process The residual stress is not left in the leaf spring. The yoke 20 is in the shape of a square cylinder. That is, the yoke 2 includes: a rectangular outer portion 202' at the upper end of the outer cylindrical portion 202 a quadrangular annular end portion 204 extending inwardly; and four inner vertical extending portions 20 extending radially downward in parallel with the optical axis 四 at the inner side of the annular end portion 2〇4, the outer core portion 202 is called To cover the yoke, the four inner vertical extensions 2〇6 are referred to as back yokes. On the other hand, the drive coil 16 is actually an octagonal cylinder. That is, the drive coil 16 includes four long sides 162, a configuration Four short sides 164 between these four long sides. The cylindrical portion 140 of the lens holder 14 has a length of 90. The angular intervals are four contact faces 140-1 that protrude outward in the radial direction. Four long side portions 162 of the drive coil 16 are bonded to the four contact faces 140-1. That is, the drive coil 16 is adhered to the four contact faces 140-1. In this regard, the permanent magnet 18 is surrounded by the four long sides 162 of the drive coil 16.

10/26 S 201229608 The opposite four rectangular (flat) permanent magnets 182 are formed. The four rectangular permanent magnet pieces 182 are disposed on the inner wall surfaces of the four sides of the outer tubular portion (mask magnetic ridge) 2〇2 of the magnetic vehicle 2G. In short, the permanent magnet 18 is composed of four rectangular (flat-plate) permanent magnet pieces 182 disposed on the respective sides of the outer cylindrical portion (mask magnetic vehicle) 202 of the magnetic cylinder 2'. On the inner circumferential surface of the outer tubular portion (mask yoke) 202 of the yoke 20, a permanent magnet 18 is disposed at a distance from the drive coil 16. The upper leaf spring (front side spring) 22 is disposed on the upper end side (front end side) of the lens holder 14 in the optical axis direction, and the lower side plate (rear side latch) 24 is disposed on the lower end side of the lens holder 14 in the optical axis 0 direction (back) End side). The upper leaf spring (front side spring) 22 has an inner circumferential side end portion 222 attached to the upper end of the lens holder 4, and an outer circumferential side end portion 224 attached to the magnetic disk, for example, the annular end portion 204 as will be described later. . Two arm portions 226 are provided between the outer peripheral side end portions 224 at the inner peripheral side end portions. Each of the arm portions is provided to connect the inner circumferential side end portion 222 and the outer circumferential side end portion 224 in the circumferential direction. The outer peripheral end portion 224 of the upper side plate I 22 is fixed to the cover 28 by the annular end 204 of the magnetic member. Specifically, the cover 28 has a quadrangular ring shape having a circular opening 4 2 8 a at the center portion. The cover 2 8 has four projections 282 projecting downward at its four corners. The annular end portion 2〇4 of the magnetic light 2 turns at the four corners and has four insertion holes a of the four protrusions 282. The upper side plate 22 (10) is circumferentially formed and has four embedded holes for the four projections 282. = The four projections 282 of the 'cover 28 pass through the annular upper end portion 2 〇 4 of the magnetic vehicle 2 = = four through holes 2G4a are embedded in the upper side plate * (four insertion holes of the outer peripheral side portion 224 of the front side elastic member 22 224a. The lower side leaf spring (the rear spring) is attached to the inner peripheral side end portion 242' of the lower end (rear end) of the lens 14 as will be described later and as will be described later.

11/26 S 201229608 The outer portion 242 and the outer peripheral side end portion 144 of the driver base 12 are bent over the inner circumference 1 and have a secret portion 246. Each arm portion 246 / port is circumferentially biased, and the inner circumferential side end portion 242 and the outer circumferential side end portion 244 are connected. The lens surgery 14 has two fixing projections (not shown in the lower end (rear end) for fixing the inner peripheral side end portion 242 of the lower side spring 24) and f'lower side plate* (rear side spring) 24 The inner peripheral side end portion M2 has two ore holes 2 that are inserted into the two fixed projections.

The fixing convex portion, the inner circumferential side end portion 242 is fixed to the lower H end of the lens holder i4). On the other hand, the outer peripheral side end portion 244 of the lower side leaf spring (rear side spring) 24 is set by the lining 30 U. Base 12. Specifically, the actuator base U has a quadrangular ring shape having a circular opening Ua at the center. Driver, the seat 12 has four protrusions I] protruding upward at its four corners. The outer peripheral end portion 244 of the lower side plate ^ (rear side spring) 24 has four through holes 244a through which the four projections 122 pass. The spacer 30 has four insertion holes 30a in which the four projections 122 are embedded. Therefore, the four projections 122 of the driver base 12 are fitted into the four insertion holes 3〇a of the gasket 30 through the four through holes 244a of the outer peripheral side end portion 244 of the lower leaf spring (rear side spring) 24. The lower end portion (rear end portion) of the lens holder 14 is fitted into the circular opening portion 12a of the actuator base 12 with a gap. In other words, the lower end portion (rear end portion) of the lens holder 14 faces the circular opening portion 12a of the driver base 12 with an interval therebetween. A female screw 142 is cut in the inner peripheral wall of the cylindrical portion 140 of the lens holder 14. On the other hand, although not shown, a male screw threadedly coupled to the female screw 142 is cut into the outer peripheral wall of the lens unit (lens barrel). Therefore, when the lens element (lens barrel) is attached to the lens holder 14, the lens element (lens barrel) is rotated about the optical axis with respect to the cylindrical portion 140 of the lens holder 14 = 12/26 201229608 and along the optical axis The screwing is performed so that the lens elements (lens barrels) are housed in the lens holder 14 and joined to each other by an adhesive or the like. The lens driving device 10 includes a counter electrode 36 for supplying electric power to the drive coil 16. The driver base 12 has a pair of insertion grooves 12b for interposing the counter electrode %. By energizing the drive coil 16 by the pair of electrodes 36, the magnetic field of the permanent magnet 18 interacts with the magnetic field generated by the current flowing through the drive coil 16, so that the lens holder 14 can be adjusted in the optical axis direction (the lens is adjusted in position). In the lens driving device 1G, the combination of the lens holder 14 holding the lens assembly, the second drive = the coil 16 is performed as a columnar 1 disposed at the center portion. In addition, the 'driver base 12, permanent magnet 18, _ plate puddle指指的镜._农置 10狮^ ::(一)22 and lower side sapphire (rear side jingjing) 4 (four) As mentioned above, in the camera with the camera, the z-axis direction (optical axis 0 = f. The use direction (the direction of the head, the W direction (10) 〇 direction): The upper direction becomes the rear direction of the front X-axis direction, and it becomes a light buckle. Therefore, the direction is also the front direction of the Y-axis direction. In the left direction, the direction is the same as the direction in the gamma-axis direction (the shooting situation). In the middle of the month, the camera is used in the actual use condition (photographing condition): In addition, the "lateral posture" will be actually made. Spears move ^• phone posture 13/26 201229608 22 24 In the configuration of the upper=toward H, 'in the case of the rear side spring 24, the position of the inner side spring 24 is only rotated by about % degrees at the opposite side end,' 1 and 2 rear end of the lens holder 14. In other words, in the rear side, only the rotation direction is about 2, and the up and down direction X is counterclockwise, and the rain is extended toward the circumference. On the other hand, The front upper end and the substantially lower end extend toward the axial direction. The substantially two arm portions 225 from the inner peripheral side end portion 242 extend from the opposite front side spring 22. Therefore, the front side is turned toward X. The position of 0 degrees is extended to the circumference of the arm: r is the front side of the elastic body 22 shown in Fig. 2, and the rear side spring of the front side is shown by the front side of the two sides and the == hour hand of the rear side of the spring 24 The arrangement of the rear side section 24 is the same as the arrangement p/b ' of the rear side magazine 24 and the front side spring 22 shown in Fig. 3, and the relationship of the front side spring 22- shown in Fig. 3 is referred to as "90 degree arrangement". The position of the degree, the inner peripheral side end is rotated only about 3 times counterclockwise, and the rear side cage 24 and * (on the rear end of the lens holder 14. The direction change - the reverse direction: only two opposite, the front side Bullet 22 and a # ^ . 13 to B. In this direction X in the clockwise direction only "from the upper right side and the substantially left end to the upper side, and the second end side 242 words" from the relative to the 14/26 201229608 9〇 The position of the degree is toward the circumference 226 and the rear side spring 24. Therefore, each arm portion of the front side spring 22 is at a position of about 120 degrees. The portion 246 is disposed to be displaced in the circumferential direction. Therefore, the rear side spring of the present application The configuration of the configuration of 24 means that the configuration shown in Fig. 2 becomes the configuration in which the two arms ', '' again' rotates the front side spring 22 of Fig. 2 by A degree. The arrangement of the 顺 clockwise spring 24 is set as it is, and the mounting position of the two (four) portions 226 is reversed by an octave. The rear side bomb 13 Jingmu for the front naphthalene 22 and the direction of the axis 0 in the transverse direction (focus direction) (the angle of inclination of the tilted lens, the front spring 22 and the rear side of the movable portion 14, 16 The weight distribution of the simulations 14 and 16 is set as follows for the two field side magazines. The weight distribution of the movable portions 14 and 16 is 5曰% for the front 曰w and 50% for the rear side spring 24. In the second case, the weight distribution of the crucibles 14 and 16 is such that the front side bomb 2 is 7〇% and the bow flat yellow 24 is 30%. The rear side 〇 first, the weight of the movable portions 14 and 16 is distributed as the front side spring 22 The simulation results of the first case where the rear side spring 24 is 50% will be described. θ FIG. 4 to FIG. 8 show the front side spring 22 and the first portion when the weight distribution of the movable portions 14 and 16 is first. The arrangement relationship of the rear side springs 24 is "configuration of the degree of twist", "configuration of 15 degrees", "configuration of 3 degrees,", "configuration of ''15/26 201229608 degrees', and '' side The front side spring 22 and the rear (focus direction) of the arrangement of the spring 24 in the circumferential direction of the spring 24 are axial = number, and light in the lateral posture The inclination angle of the lens in the direction of the axis 0; the field in which the direction of rotation (circumferential direction) is rotated, the figure of the line _ _# 24 ^ ^ = the number of points and the number of points (five), (8) the other two side pages 22 The circumferential direction of the magazine's normal axis 0 direction (focus direction) is the axis, ^ is the lateral position of the needle with light as the reference (twist), and in the week [" with the configuration relationship shown in Figure 2 Field slant of small _: In the state of motion = state, the pitch is 〇, and the value of the lens element is not tilted as shown in Figure 4 U), at C value. With the optical axis. The circumference of the orthogonal plane: single & : is the angle of the =:::2 direction, and the disc light 〇p of the rear side spring 24, and the number of hangs is the angle between the direction in which the square of the A value is the maximum value For the large size, in the "0 degree configuration, (the table again: 疋 because each of the arms 226 and the rear side of the arm #24's various maps ^) in the position of the side spring U as about 30 degrees 4 = the arm 鸠 is placed in the circumferential offset. The % 合 ' can be buckled from Figure 4 (C), at the angle of rotation is ~ degrees ~ about 70 degrees, large: two ^ ΐ ί; Τ (4), The object is subdivided (as shown in Fig. 5(4), in the "15 degree configuration, the flat (four) circumferentially conic constant constant of the middle 22 is orthogonal to the optical axis 0 is the maximum value = 16/26

S 201229608 To the γ and Houna I 2 4, the plane of the plane orthogonal to Lin Biao often ":, rir ' angle, ,, " 45 degrees. This is because in the configuration of the "front side" Each of the arm portions 226 and the rear side of the magazine 22 is disposed at a position shifted by about 45 degrees in the circumferential direction. It can be seen from Fig. 5 (C) that the angle of rotation is from 0 degrees to about 6 〇 * degrees, about 150 degrees to about 250 degrees, and about 340 degrees to 360 degrees, pitching in soil 1 ( It varies slowly within minutes. As shown in Fig. 6 (4), in the "three-degree arrangement", the spring direction constant in the circumferential direction of the plane orthogonal to the shirt of the front side spring 22 is the direction m side of the magazine 24 orthogonal to the optical axis 的The angle between the directions in which the circumferential circumferential mesoprite constant is the maximum is about 60 纟. This is because in the configuration of 3 degrees, the "arms of the front springs 22" and the rear side of the springs, each arm The portion 246 is disposed at a position shifted by approximately 6 degrees in the circumferential direction. In. "Haichangkou" can be seen from Fig. 6 (C), only in the narrow angle range of the rotation angle is 〜 degree ~ large, force 60 degrees, about 175 degrees ~ about 25 degrees, about 3 degrees ~ 3 (6) degrees, The pitch changes slowly within ±1 (minutes). As shown in Fig. 7(A), in the "-μ degree arrangement, the direction in which the spring constant is the maximum in the circumferential direction of the plane orthogonal to the optical axis q of the front side spring 22: and the sum of the rear side magazine 24 The angle between the directions in which the elastic constant of the plane of the optical axis 〇 orthogonal plane is the maximum value is about 15 纟. This is because the arms 226 and the rear side of the front side spring 22 are in the configuration of a 15 degree lean Each arm portion 246 of the spring η 24 is disposed at a position shifted by approximately 15 degrees in the circumferential direction. In this case, it can be seen from Fig. 7 (C) that the angle of rotation is from a radius of about 125 degrees to about 260 degrees, about 300 degrees to 360 degrees, and a range of angles of ±1. Change slowly within (min). As shown in Fig. 8(A), in the configuration of "30 degrees", the arms 226 and the rear side springs of each of the "246" s (four) 22 of the front side spring 17/26 201229608 are large. The angle is the range of all angles, and the pitch changes slowly within one (knife). Next, the simulation results of the second case where the weight of the materials 14 and 16 and the rear side of the elastomer 24 are 3〇% are described. 9 to 13 show the relationship between the front side spring 22 and the rear side spring 24 in the case of the weight distribution of the movable portions 14 and 16, respectively, the "arrangement of the twist", the "arrangement of 15 degrees", and the degree "Arrangement", "configuration of t! 5 degrees", and "3" degree arrangement, the front side of the spring and the spring of the rear side spring 24 are tilted, and the lateral posture is in the direction of the optical axis ( The focus direction is a graph showing the simulation result of the change in the tilt angle (pitch) of the lens when the axial direction is rotated in the arbitrary direction of rotation (circumferential direction). In each of FIGS. 9 to 13 '(4) is the actual The line BTM and the dotted line TOP indicate the circumferential elastic constants (N/face) _, (8) and (c) of the rear spring 24 and the front spring 22, respectively, in the lateral direction in the optical axis direction (focus direction) The angle of inclination of the lens assembly in the case where the lens driving device 1 (the compact type camera) is rotated clockwise in the circumferential direction with reference to the arrangement relationship shown in FIG. 2 (0 degree) A circular chart and a characteristic diagram of the change of pitch. In (c), the horizontal axis represents the angle (degrees) and the vertical axis represents In the state where the lens element is not tilted, the pitch is 0 (minutes), and in the forward tilt state, the pitch is positive 18/26. The value of 201229608' is tilted backward, and the pitch is As shown in Fig. 9(A), in the "arrangement of the twist", the spring constant in the circumferential direction of the plane orthogonal to the optical axis 前 of the front side magazine 22 is the maximum value direction, and the rear side magazine The angle of loss between the directions in which the spring constant of the plane orthogonal to the optical axis 24 is the maximum value is about 3 degrees. This is because, as described above, at the configuration of 0 degrees, (refer to FIG. 2) In the middle, each arm portion 226 of the front side 22° and each arm portion 246 of the rear side spring 24 are disposed at a position shifted by about 30 degrees in the circumferential direction. In this case, it can be seen from FIG. 9 that the pitch angle is ±1 at a wide angle range of a rotation angle of 0 degrees to about 75 degrees, about 15 degrees to about 26 degrees, and about 340 degrees to 360 degrees. As shown in Fig. 10 (A), in the "15 degree arrangement, the spring constant in the circumferential direction of the plane orthogonal to the optical axis 前 of the front side magazine 22 is the maximum direction: The angle between the circumferential direction of the plane of the rear side spring 24 orthogonal to the optical axis 箦 is always about 45 degrees. This is because in the "15 degree configuration", the front side spring 22 Each arm portion 226 and each arm portion 246 of the rear side spring 24 are disposed at a position shifted by approximately the illusion in the circumferential direction. In this case, it can be seen from Fig. 1G (6) that the rotation angle is 〇 degrees to about two degrees. η is large: 170 degrees to about 260 degrees, an angle of about 350 degrees to 360 degrees, and the pitch is slowly changed within ±1 (minutes). 22 and I: two:: 'in '3 degrees configuration "In the middle, the front side spring direction, and the direction of the square of the maximum value of the rear side of the second side of the second reading are (4) = the circumference of the plane = spring often In the "3 degree configuration", the front side is botanical 22, and 60 degrees. It is not because the arm portions 246 of the cymbal are disposed in the circumferential direction of each arm portion 226 and the rear side.

Π Privately moved about 6 degrees. In the case of '9/26 201229608, it can be seen from the figure u (c) that the narrow angle range is only at a rotation angle of about ~75 degrees, about 175 degrees to about 260 degrees, and the pitch is ±1 ( It varies slowly within minutes. As shown in Fig. 12 (Α), in the "15-degree arrangement", the direction in which the spring constant of the plane of the front side spring 22 orthogonal to the optical axis 为 is the maximum value, and the optical axis of the rear side spring 24 The angle between the directions in which the circumferential mid-elastic coefficient of the 〇 orthogonal plane is the maximum is about 15 degrees. This is because the arm portions 226 of the front side springs 22 and the respective portions 246 of the rear side springs "4" are disposed at positions shifted by about 15 degrees in the circumferential direction in the "15 degree arrangement". In this case, as can be seen from FIG. 12(C), the angle range of the rut at a rotation angle of from about 大约 to about ^ degrees, from about 130 degrees to about 270 degrees, and from about 320 degrees to 36 degrees, is tilted at Within ±1 (minutes), it changes slowly. As shown in FIG. 13(A), in the "one-three-degree arrangement", the spring constant in the circumferential direction of the plane orthogonal to the optical axis 前 of the front side spring 22 is the maximum square white and the rear side spring 24 The angle between the direction in which the circumferential direction of the plane perpendicular to the optical axis 〇 is the maximum value is about 〇. This is because each arm portion 226 of the front side spring 22 and each arm portion 246 of the rear side spring 24 are disposed at substantially the same position in the circumferential direction in the arrangement of the cage - 3 degrees.丨3 (c) It can be seen that the pitch angle is ±1 (minutes) at a wide angle range of rotation angle - about 6 degrees, about 110 degrees to about 250 degrees, about 290 degrees to 36 degrees. In the above, it can be seen that, in the case where the weights of the movable portions 14 and 16 are distributed, in the case of the second and the second, the spring constant of the surface of the front side spring 22 orthogonal to the optical axis = When the direction of the maximum value and the direction in which the spring constant is the maximum in the circumferential direction of the plane orthogonal to the optical axis 0 of the rear side spring 24 is within 45 degrees, the rotation angle can be wide. 20/26 201229608 The angle range makes the pitch smaller. If the above-mentioned angle of loss is within the range of 3 degrees, the pitch can be made smaller in a wider angle range of rotation, and if the angle is actually 0 degrees, The pitch is made smaller at a very wide angle of rotation. The preferred embodiments of the present invention are described, but it is obvious that various shapes can be made by those skilled in the art without departing from the spirit of the present invention. For example, in the above embodiment, each of the leaf springs has two arm portions. 1 is a schematic perspective view of a lens driving device according to an embodiment of the present invention. FIG. 1 is an exploded perspective view of a lens driving device according to an embodiment of the present invention. The top view of the upper side plate used for the drive unit: (W side spring) and the arrangement of the lower side plate (rear side spring). Fig. 3 is a view showing the relationship between the front side spring and the post-mutilation arrangement relationship ("90 degree arrangement") after the clockwise rotation of the (four) of the two arm portions by 9G degrees with respect to the front side spring shown in Fig. 2 Top view. 4 indicates that the lens is honed in the lens shown in Fig. ,, and the upper side is assigned to the front side of the front side * 5G%, and the latter * 5G%. , ^The arrangement relationship between the early yellow and the rear side spring is "the arrangement of g degrees", the spring constant of the mean yellow, and the direction of rotation in the lateral posture, and the direction of the axis are arbitrary directions of rotation ( Circumference) The rotation of the fruit is shown in the case where the variation of the angle of the coffee (the pitch angle (pitch (10))) is only W 〇 on the back side without the yellow 50〇/〇.

21/26 S 201229608 The configuration relationship between the front side spring and the rear side spring is "15 side springs and the circumferential side of the rear side magazine". When the 4th time, the station is too & constant, and the light in the lateral position ( ) Rotate the graph in an arbitrary direction of rotation (circumferential direction) in the axial direction. The result of the simulation of the change of the (pitch): in the lens driving device shown in Fig. 1, in the movable portion, the amount is divided into 50% of the front side magazine and 5%% of the rear side magazine. The arrangement relationship between the rear side and the rear side is "3" degree arrangement, the spring constant of the front and rear side springs in the horizontal direction, and the arbitrary direction of rotation in the horizontal direction with the light = direction (focus direction) (circumferential) A circle of the simulation result of the change in the tilt angle (pitch) of the lens when the rotation is two. Fig. 7 is a lens drive device shown in Fig. 7F, in which the weight is distributed as a W-side spring. In the case where the rear side spring and the rear side spring are 5G%, the arrangement relationship between the = side spring and the rear side spring is "_15 degree arrangement, and the spring constant of the side spring and the rear side spring in the circumferential direction and the lateral posture In the middle, the change in the tilt angle (pitch) of the lens in the case where the direction of the axis (the direction of the focus) is rotated in the axial direction (the circumferential direction) is arbitrary. Fig. 8 is a table π in the lens driving device shown in Fig. i, which is heavy in the movable portion! In the first field where the W side spring is 5G% and the rear side spring is 5〇%, the arrangement of the spring and the rear side spring is (4), and the circumferential direction of the other side spring and the rear (four) spring. In the spring recording, the angle of inclination (pitch) of the lens when the optical axis direction (focus direction) is rotated in the axial direction (the focal direction) in the axial direction is lighter.

22/26 S 201229608 FIG. 9 is a view showing the front side spring and the rear side spring in the second embodiment where the weight of the movable portion is 70% of the front side spring and 3 % of the rear side spring in the lens driving device shown in FIG. The arrangement relationship is "the arrangement of the twist, the spring constant of the front side spring and the rear side spring of the time 1 and the rotation direction (circumferential direction) of the optical axis direction (focus direction) in the lateral posture (4) arbitrary rotation direction (circumferential direction) In the case of ^, the change in the tilt angle (pitch) of the lens depends on the result of W~cutting 罝T, and the weight of the movable portion of the cymbal is divided into the front side spring 7〇%, the rear side spring yellow 3〇% of the second, the front side spring And the rear side springs are set to "15 degrees", the spring constant of the circumferential side spring and the rear side spring, and the direction of rotation (direction of focus) in the lateral direction in the axial direction. The change of the tilt angle (pitch) of the lens to the case of the rotation ^ is based on the result! U is the table: in the figure? In the lens driving device shown, the movable portion to the S are distributed as the front side selection spring 7G%, and the rear side magazine (4) the arrangement of the rear side spring and the rear flap _ is "3G degree/medium and the rear side spring" The simulation result of the change in the inclination angle (pitch) of the lens when the circumferential spring constant and the lateral posture = the upper focus direction are the axial rotation direction (circumferential) rotation

Fig. 12 is a view showing the weight distribution in Fig. 1A as the front spring 7G%t' in the light distribution axis direction of the front side spring and the rear side spring of the movable portion (the focal direction constant and the rotation direction of the horse axis in the lateral posture) (Circumferential) A diagram showing the simulation result of the inclination angle (pitch) of the lens when the rotation is 23/26 201229608. Fig. 13 is a table showing the movable weight distribution in the lens driving device shown in Fig. 1. The front side spring 70%, the rear side spring f 3 ()% of the second spring and the rear spring arrangement _ is the "^ degree configuration, the rigid side free spring and the fairy's circumferential bribe, the optical axis The direction (wire direction) is a diagram of the inclination angle (pitch) α (circumferential) rotation of the lens when the rotation is arbitrary in the axial direction. The simulation result of the spoon intersection [Description of main components] The lens driving device ( Driver) 12 Driver base 12a Circular opening 12b Insertion groove 122 Projection 14 Lens holder 14 〇 cylindrical portion 140-1 Contact surface 142 Female thread 16 162 164 18 182 20 202 Drive coil long side end edge permanent magnet plate Permanent magnet piece magnetic car cover magnetic roller (outside Ministry) 24/26 204 201 229 608

204a 206 22 222 224 224a 226 24 242 242a 244 244a 246 28 28a 282 30 30a 36 O Annular end insertion hole back magnet (inside vertical extension) Upper side leaf spring (front side magazine) Inner peripheral side end outer peripheral side End through hole arm lower side plate (rear side spring) inner peripheral side end fitting hole outer peripheral side end desired hole arm cover circular opening projection pad insertion_inlet hole optical axis (drive shaft)

S 25/26

Claims (1)

201229608 Seven patent application scope: A lens driving device capable of adjusting a lens holder for holding the lens assembly in a position adjustment 'loading_spinning mirror element; for the fixing portion of the outer fixing portion of the lens holder The fuel-driven driving coil '· the magnetic vehicle holding the permanent magnet? The moving permanent magnet of the spring and the spring is arranged in the direction of the optical axis of the lens holder __. The second lens driving device is characterized in that: the male spring and the rear side magazine each include: an outer skirt portion of the lens portion: an outer skirt on the fixing portion; and an inner peripheral end portion of the upper side The angle between the direction of the front side spring of the two arm portions of the outer peripheral side end portion and the direction of the optical axis perpendicular to the optical axis is the first term The lens drive is placed, wherein the above-mentioned two corners are in the lens driving device of any of the first to third aspects of the patent range. Set along the circumference. Help set, its 26/26 S