JP6009954B2 - Lens drive device - Google Patents

Description

  The present invention relates to a lens driving device that performs focus adjustment and image blur correction by moving a lens within a movable frame.

  Conventionally, there is JP 2011-39426 A as a technical document in such a field. This publication describes a lens driving device that includes a movable frame that holds the lens and moves in the optical axis direction with respect to the fixed frame, and a drive mechanism that moves the movable frame in the optical axis direction. This drive mechanism includes a flexible printed circuit board (hereinafter referred to as FPC) that is electrically connected to a conductive wire that constitutes a drive coil. The FPC described in this publication includes a movable frame side fixed portion provided at one end of the FPC and fixed to the movable frame, and a fixed frame side fixed portion provided at the other end of the FPC and fixed to the fixed frame. Have. In this FPC, the movable frame side fixed portion and the fixed frame side fixed portion extend in the optical axis direction and are connected by a connection portion that is folded back at approximately 180 degrees. As described above, the movable frame is easily moved relative to the fixed frame by having the connection portion extending in the optical axis direction and folded back at 180 degrees.

JP 2011-39426 A

  However, when an FPC having a connecting portion having a folded portion as described above is used, the connecting portion is folded between the movable frame and the fixed frame, so that the space occupied by the FPC in the apparatus increases. There is a problem that. Further, in the case where the FPC has the connecting portion as described above, there is a problem that the device cannot be reduced in size because a large space for arranging the power feeding portion inside the device must be secured. As described above, when the FPC is fixed to the movable frame and the fixed frame, when the movable frame is moved with respect to the fixed frame, the force in the rotation direction around the fixed portion of the FPC with respect to the movable frame is applied. It becomes easy to work. Therefore, there is a possibility that the movable frame deviates from the trajectory that should be moved and the movement of the movable frame relative to the fixed frame becomes unstable.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a lens driving device that realizes downsizing of the device and stabilizes the movement of the movable frame.

  In order to solve the above-described problems, the present invention provides a lens drive including a movable frame that supports a lens and is movably supported in the direction of the optical axis with respect to a base portion, and a drive unit provided in the movable frame. The apparatus includes a flexible power supply unit that supplies a drive signal to the drive unit, and the power supply unit extends in a direction orthogonal to the optical axis of the movable frame from a first fixed unit whose one end is fixed to the movable frame. The first extending portion extending along the surface to be connected to the other end side of the first extending portion is connected to one end side, extends in the direction of the optical axis, and the other end side is fixed to the base portion. And a second extending portion having a second fixing portion.

  According to the lens driving device of the present invention, the flexible power feeding unit includes the first extending portion extending along the surface extending in the direction perpendicular to the optical axis of the movable frame, and the first extending portion. And a second extending portion that extends in the direction of the optical axis and is connected to an end portion of the existing portion opposite to the first fixing portion. And the 1st extension part extended in the orthogonal direction of an optical axis is fixed to a movable frame, and the other end side of the 2nd extension part extended in an optical axis direction is being fixed to the base part. Therefore, the first extension part and the second extension part form a right angle, and the first extension part and the second extension part can be arranged so as to be along the movable frame. Compared with the conventional power supply unit that is folded back, the space occupied by the power supply unit inside the apparatus can be reduced. Therefore, the arrangement space of the power feeding section that must be secured can be reduced, and the apparatus can be miniaturized. In addition, the first extending portion having the first fixing portion with respect to the movable frame and the second extending portion having the second fixing portion with respect to the base portion form a right angle. Therefore, the first extension portion is less likely to rotate on a plane perpendicular to the optical axis as compared with the case where there is no right-angle portion. Thus, since the 1st extension part and the 2nd extension part are orthogonal, the force to the rotation direction on the plane orthogonal to an optical axis becomes difficult to apply to a movable frame. Therefore, since it is possible to suppress the occurrence of the situation in which the movable frame deviates from the trajectory in the optical axis direction, it is possible to stabilize the movement of the movable frame in the optical axis direction with respect to the base portion.

The first fixed portion is located at the first corner of the surface of the movable frame that extends in the direction orthogonal to the optical axis, and the other end of the first extended portion is the first of the surface. Extending beyond a second corner opposite the one corner.
As described above, the first fixed portion is located at the first corner of the surface of the movable frame that extends in the direction perpendicular to the optical axis, and the first extended portion extends from the first corner to the second corner. It extends beyond the corners of the. Therefore, the first extending portion can be arranged longer on the movable frame, the first fixed portion of the first extending portion with respect to the movable frame, and the second of the second extending portion with respect to the base portion. The distance from the fixed part can be increased. Here, if the two fixed portions are close to each other, when the movable frame is moved in the optical axis direction with respect to the base portion, a force in the rotation direction that rotates around the fixed portion is likely to work. There is a possibility that the movable frame moves out of the orbit in the optical axis direction. However, in the present invention, since the position of the first fixed portion with respect to the movable frame is separated from the position of the second fixed portion with respect to the base portion, when the movable frame is moved in the optical axis direction with respect to the base portion. The force in the rotation direction that rotates around the fixed portion is less likely to act, and the possibility that the movable frame moves out of the path in the optical axis direction can be avoided. Therefore, the movement of the movable frame with respect to the base portion can be stabilized.

Further, the first and second extending portions are composed of first and second branch portions that are divided into two branches from the power supply base portion, and on the surface extending in the direction perpendicular to the optical axis in the movable frame, A coil loading unit for loading the coil of the drive unit is provided, the coil is fixed to the back side of the first and second branches, and the first fixed unit is a coil loading of the movable frame. It is made up of parts.
As described above, when the first and second extending portions are the first and second branch portions that are bifurcated from the power feeding base portion, the first and second extending portions are bent independently of each other. be able to. In the present invention, since the coil of the drive unit is fixed to the back side of each of the first and second branches, the coil can be loaded into the coil loading unit independently at each branch. . Therefore, since it is only necessary to load each coil in the coil loading part, even if there is a dimensional error in the coil or the coil loading part, the loading of one coil does not affect the loading of the other coil, What is necessary is just to fine-tune the coil or coil loading part with the dimension error. That is, since the coil can be easily loaded into the coil loading unit, the power feeding unit can be easily fixed to the movable frame.

  According to the present invention, it is possible to reduce the size of the apparatus and stabilize the movement of the movable frame.

It is a perspective view which shows one Embodiment of the lens drive device which concerns on this invention. It is a perspective view which shows the state which removed the cover part of the lens drive device of FIG. It is a disassembled perspective view which shows the lens drive device of FIG. It is a disassembled perspective view which shows the lens drive device of FIG. It is a perspective view which shows a movable frame and FPC. It is sectional drawing which shows a base part and a movable frame. It is sectional drawing which shows a movable frame and a lens holding frame. It is a perspective view which shows FPC. It is a perspective view which shows a movable frame and FPC.

  Hereinafter, a preferred embodiment of a lens driving device according to the present invention will be described in detail with reference to the drawings.

  The lens driving device shown in FIG. 1 is used in a digital camera, a mobile phone, a smartphone, or the like that performs image blur correction, and is a CCD [Charge Coupled Device] image sensor or a CMOS [Complementary Metal Oxide Semiconductor] image sensor that is an image pickup device. It is placed in front and used.

  As shown in FIGS. 1 to 3, the lens driving device 1 includes a rectangular parallelepiped lid body 2, a rectangular base portion 3 for closing the opening of the lid body 2, and a focus adjustment unit that performs focus adjustment. A flexible printed circuit board for focus adjustment (hereinafter referred to as FPC) 5 for ensuring electrical connection between the drive unit 4 and an external circuit, an image blur correction drive unit (drive unit) 6 and an external circuit And an image blur correction FPC (feeding unit) 7 for securing the electrical connection, and a substantially cylindrical lens barrel 8 accommodating at least one lens R. In the following description, the direction perpendicular to the optical axis C of the lens R is defined as the X axis, and the direction perpendicular to the optical axis C direction and the X axis is defined as the Y axis.

  The lid 2 is a box-shaped member having a circular opening 2a centered on the optical axis C of the lens R, and the base 3 is a rectangular frame having a circular opening 3a centered on the optical axis C. Shaped member. The lens barrel 8 holds the lens R in a state where the lens R is exposed from the opening 2 a of the lid 2 and the opening 3 a of the base 3. The base 3 has a protrusion 3b that protrudes from one side of the peripheral edge of the base 3 in the direction of the optical axis C. A rectangular opening 3c is formed at the center of the protrusion 3b. Yes. An H-shaped resin insulating plate 9 fixed to the front end portion 5a of the FPC 5 enters the opening 3c, and the resin insulating plate 9 closes the opening 3c. As shown in FIG. 2, the FPC 7 includes a power supply base 7p and first and second branch portions 7a and 7b branched from the power supply base 7p. The FPC 7 branches into a first branch portion 7 a and a second branch portion 7 b at a position close to the lid 2 and the base portion 3. The front ends of the branch portions 7a and 7b are fixed to the movable frame 10, and return yokes 11 for amplifying the attractive forces of the magnets 6a and 6b of the image blur correction drive unit 6 are provided on the front ends of the branch portions 7a and 7b. It is fixed.

  The movable frame 10 is supported so as to be movable in the direction of the optical axis C with respect to the base portion 3. As shown in FIGS. 3 to 5, the movable frame 10 includes a circular opening 10 a centered on the optical axis C, an oval coil loading portion 10 b formed at each corner on one side, and a movable frame 10. It has three ball mounting recesses 10c (see FIG. 5) into which the sphere 13 formed on the outer peripheral surface of the frame 10 enters. The lens barrel 8 is inserted into the opening 10 a of the movable frame 10, and the coils 6 c and 6 d that form an oval shape of the image blur correction drive unit 6 are fitted into the coil loading portion 10 b of the movable frame 10. Combined and fixed. The movable frame 10 includes a magnet holding portion 10e that protrudes in the direction of the optical axis C on one side of the peripheral edge of the movable frame 10, and a magnet holding portion 10e that is a corner of the movable frame 10 with the optical axis C interposed therebetween. And two projecting portions 10f provided on the opposite side.

  The magnet holding part 10e of the movable frame 10 is formed in a crescent shape as viewed from the optical axis C direction, and the column parts 10g formed at both ends of the magnet holding part 10e are notched in a semi-cylindrical shape on the outer side. A ball receiving portion 10h that extends in the direction of the optical axis C is provided. Two spheres 15 enter one sphere receiving portion 10h, and one sphere 15 enters the other sphere receiving portion 10h, but two spheres 15 enter the other sphere receiving portion 10h. One sphere 15 may enter one of the ball receiving portions 10h.

  Further, as shown in FIG. 4, the support portions 3 f formed at both ends of the protruding portion 3 b of the base portion 3 are formed with ball receiving portions 3 d cut out in a semi-cylindrical shape at three locations. Each ball receiving portion 3d is formed at a position corresponding to the above-described ball receiving portion 10h. As shown in FIG. 6, the base portion 3 is formed with a fitting recess 3e for fitting the coil 4a and the yoke 16 inside the protrusion 3b of the base portion 3, and this fitting recess 3e. The coil 4a of the focus adjustment drive unit 4 and the two yokes 16 are fitted to each other. The coil 4a of the focus adjustment drive unit 4 has a central part 4b that forms an upper bottom part of a trapezoid when viewed from the optical axis C direction, and end parts 4c that are respectively located on both sides of the central part 4b. 4c is bent about 45 degrees inward with respect to the central portion 4b. The yokes 16 are disposed outside the end portions 4c of the coils 4a.

  Further, as shown in FIG. 5, the outer periphery of the magnet holding portion 10e of the movable frame 10 has a flat magnet fixing portion 10i extending in the optical axis C direction and the Y axis direction, and a magnet fixing portion 10i. And a magnet fixing portion 10k formed at an inclination of 45 degrees on the opposite side of the magnet fixing portion 10j with respect to the magnet fixing portion 10i. Magnets 4d, 4e, and 4f of the focus adjustment drive unit 4 are fixed to the magnet fixing units 10i, 10j, and 10k, respectively. In the state where the movable frame 10 is held by the base portion 3, as shown in FIG. 6, the central portion 4b of the trapezoidal coil 4a faces the outside of the magnet 4d, and the coil 4a is outside the magnets 4e and 4f. Each end 4c faces each other.

  In addition, a hall element 17 (see FIG. 3), which is a magnetic field detection element, is disposed inside the central portion 4b of the coil 4a, and the hall element 17 is fixed to the tip portion 5a of the FPC 5. Two iron leads 18 extending from the central portion 4b to the end portion 4c of the coil 4a are disposed on both ends of the hall element 17, and the end portion 18a of the lead 18 on the end portion 4c side of the coil 4a is disposed. 6 is electrically connected to the coil wire of the end 4c in a state of extending outside the end 4c of the coil 4a, as shown in FIG.

  By the cooperation of the coil 4a and the magnets 4d, 4e, and 4f, the movable frame 10 can move in the direction of the optical axis C with respect to the base unit 3 to adjust the focal point and change the focal length. It becomes. Further, since the yoke 16 is provided outside the end portion 4c of the coil 4a, the yoke 16 fitted to the base portion 3 is attracted to the magnets 4e and 4f fixed to the movable frame 10, and the movable frame 10 is A magnetic attractive force in a direction perpendicular to the optical axis C with respect to the base portion 3 is generated. Further, the base 3 and the movable frame 10 are sucked in a state where the sphere 15 is interposed between the ball receiving portion 10h (see FIG. 5) of the movable frame 10 and the ball receiving portion 3d (see FIG. 4) of the base portion 3. Therefore, the movable frame 10 is slidably supported on the base portion 3 via the sphere 15.

  As shown in FIGS. 4 and 5, the two protrusions 10 f provided at the corners of the movable frame 10 are engaged for joining the pressing plate 21 that prevents the lens holding frame 20 from being lifted. A protrusion 10m is provided. Engagement protrusions 10n for joining the pressing plates 21 are provided on the support pillars 10g of the magnet holding part 10e provided on the opposite side of the protrusion 10f of the movable frame 10 with the optical axis C interposed therebetween. The engaging protrusions 10m and 10n of the movable frame 10 are engaged with the engaging holes 21a and 21b of the pressing plate 21, respectively. Thereby, the movable frame 10 and the pressing plate 21 are fixed in a state where the lens holding frame 20 is sandwiched.

  As shown in FIG. 7, the lens holding frame 20 that holds the lens barrel 8 is supported so as to be movable in the direction perpendicular to the optical axis C with respect to the movable frame 10. The lens holding frame 20 includes a circular opening 20a into which the lens barrel 8 is fitted, a magnet fitting hole 20b for fixing the magnets 6a and 6b of the image blur correction drive unit 6, and the lens holding frame 20 to the movable frame 10. The first to third suction magnets 51, 52, 53 for supporting the magnets are provided with magnet fitting recesses 20 c and ball receiving recesses 20 d (see FIG. 4) for receiving the spheres 13.

  Two magnet fitting holes 20b of the lens holding frame 20 are provided at positions corresponding to the coil loading portions 10b (see FIG. 6) of the movable frame 10. The magnets 6a and 6b fitted in the magnet fitting hole 20b face the coils 6c and 6d fitted in the coil loading portion 10b in the optical axis C direction. The lens holding frame 20 is moved in the direction perpendicular to the optical axis C with respect to the movable frame 10 by the cooperation of the coils 6c and 6d of the image blur correction drive unit 6 and the magnets 6a and 6b to perform image blur correction. It becomes possible.

  Three magnet fitting recesses 20c of the lens holding frame 20 are provided, and first to third attracting magnets 51, 52, and 53 magnetized with four poles are fitted into the respective magnet fitting recesses 20c. Further, as shown in FIG. 5, the movable frame 10 has metal piece insertion portions 10 d that are holes for inserting the first to third iron pieces 41, 42, 43 having a fork shape in three places. Each of the metal piece insertion portions 10 d is provided at a position corresponding to the magnet fitting recess 20 c of the lens holding frame 20. The first to third suction magnets 51, 52, 53 fitted in the magnet fitting recess 20 c of the lens holding frame 20 are the first to third iron pieces 41 inserted into the metal piece insertion part 10 d of the movable frame 10. , 42 and 43 face the optical axis C direction. Therefore, when the lens holding frame 20 is disposed on the movable frame 10, the magnetic attractive force generated by the first to third attractive magnets 51, 52, 53 and the first to third iron pieces 41, 42, 43. Thus, the lens holding frame 20 and the movable frame 10 are attracted to each other.

  The first suction magnet 51 and the first iron piece 41 constitute the first suction part 31, the second suction magnet 52 and the second iron piece 42 constitute the second suction part 32, and The third suction magnet 33 and the third iron piece 43 constitute a third suction part 33. Further, the magnetic attractive force generated by the first to third attractive portions 31, 32 and 33 is stronger than the magnetic attractive force generated by the magnets 6 a and 6 b and the return yoke 11 of the image blur correction drive unit 6. ing. Therefore, when the lens holding frame 20 is moved in the direction orthogonal to the optical axis C with respect to the movable frame 10, the lens holding frame 20 can be reliably moved to the center position in the movable frame 10.

  As shown in FIG. 4, three ball receiving recesses 20 d of the lens holding frame 20 are provided at positions corresponding to the ball mounting recesses 10 c (see FIG. 5) of the movable frame 10. In a state where the lens holding frame 20 is disposed on the movable frame 10, a space large enough to accommodate the sphere 13 is formed by the ball receiving recess 20 d of the lens holding frame 20 and the ball mounting recess 10 c of the movable frame 10. The The lens holding frame 20 is supported by the sphere 13 so as to be movable with respect to the movable frame 10 by inserting the sphere 13 into the space formed by the ball receiving recess 20d and the ball mounting recess 10c. Further, when three spheres 13 are connected in a plane orthogonal to the optical axis C, an isosceles triangle is formed, and the lens holding frame 20 is supported by the movable frame 10 at three points. Therefore, the lens holding frame 20 can be moved with respect to the movable frame 10 in a stable state.

  Further, as shown in FIG. 3, a back yoke 25 having a crescent shape when viewed from the optical axis C direction is provided on the side of the holding plate 21 of the lens holding frame 20 in the optical axis C direction. The back yoke 25 is in close contact with the magnets 6a, 6b, 51, 52, 53 (see FIG. 7) of the lens holding frame 20 at the time of assembly.

  Incidentally, a drive signal for moving the lens holding frame 20 in a plane orthogonal to the optical axis C is supplied to the coils 6c and 6d of the image blur correction drive unit 6 by the FPC 7. As shown in FIGS. 8 and 9, the FPC 7 is configured by a plate-like flexible member and can be bent. A Hall element 12 for magnetic detection is fixed to the back side of each branch portion 7a, 7b in the FPC 7. Moreover, each branch part 7a, 7b of the FPC 7 extends in the optical axis C direction with the first extending part 7e extending on the surface 10s extending in the direction orthogonal to the optical axis C in the movable frame 10. It has the 2nd extension part 7g and the 3rd extension part 7k extended in the direction away from the movable frame 10. As shown in FIG.

  One end of the first extending portion 7e of the FPC 7 has a movable frame side fixed portion (first fixed portion) 7d fixed to the first corner portion 10t on the protruding portion 10f side of the movable frame 10. Yes. Coils 6c and 6d of the image blur correction drive unit 6 are fixed to the tip of each first extending portion 7e of the FPC 7 so as to surround the Hall element 12. The coils 6c and 6d are loaded into the coil loading portion 10b (see FIG. 5) of the movable frame 10, whereby the FPC 7 is fixed to the movable frame 10, and the movable frame side fixing portion 7d of the FPC 7 is configured. .

  As described above, in the FPC 7, the coils 6c and 6d of the image blur correction drive unit 6 are fixed to the back surfaces of the branch portions 7a and 7b, so that the coils 6c and 6d can be loaded into the coil loading unit 10b. This can be done independently at each branch 7a, 7b. Therefore, the coils 6c and 6d need only be loaded into the coil loading portion 10b of the movable frame 10. Therefore, even if there is a dimensional error in the coils 6c and 6d or the coil loading portion 10b, The loading of one coil does not affect the loading of the other coil, and it is only necessary to finely adjust the coil 6c, 6d or the coil loading portion 10b that has a dimensional error. That is, since the coils 6c and 6d can be easily loaded into the coil loading section 10b, the FPC 7 can be easily fixed to the movable frame 10.

  Further, the first extending portion 7e of the FPC 7 extends along the movable frame 10 from the movable frame side fixed portion 7d provided at one end of the first extending portion 7e, and the first extending portion 7e. Is extended from the first corner 10t of the movable frame 10 on the coil loading portion 10b side beyond the second corner 10u facing the first corner 10t. The first extending portion 7e of the FPC 7 has a planar shape having a width in the direction orthogonal to the optical axis C, and the other end of the first extending portion 7e is perpendicular to the optical axis C direction. Since the bent first bent portion 7f is provided, the first bent portion 7f exerts a tensile force against twisting, and the first extending portion 7e rotates in the direction orthogonal to the optical axis C. It has become difficult.

  The second extending portion 7g of the FPC 7 extends in the direction of the optical axis C from the first bent portion 7f of the FPC 7 that is one end thereof, and as shown in FIG. 2, the second extending portion 7g Has a base side fixing portion (second fixing portion) 7m fixed to the base portion 3 at the other end. In each base-side fixing portion 7 m of the FPC 7, the second extending portion 7 g of the FPC 7 is fixed by being sandwiched between a pair of left and right engaging projections 3 g formed on the base portion 3.

  A second bent portion 7h that is bent outward at a right angle from the second extended portion 7g is provided at the end of the second extended portion 7g of the FPC 7 opposite to the first bent portion 7f. ing. Each second bent portion 7h is provided with a third extending portion 7k extending outward from the lid body 2 and the base portion 3. The end portion of each third extending portion 7k opposite to the second bent portion 7h is connected to a power supply base portion 7p extending outward with respect to the lid body 2 and the base portion 3. The power supply base 7p of the FPC 7 is connected to an external circuit (not shown), and receives a drive signal for operating the lens holding frame 20 from the external circuit to the coils 6c and 6d of the image blur correction drive unit 6. Supply.

  Next, the operation of the lens holding frame 20 will be described.

  If camera shake occurs when shooting with a device (for example, a camera) in which the lens driving device 1 is incorporated, the position of the optical axis C may change. In this case, a camera shake detection sensor such as a gyro sensor detects camera shake, and the control means (not shown) sends the drive signal of the lens holding frame 20 via the FPC 7 so that the position of the optical axis C is maintained at a predetermined position. Output to the coils 6c and 6d.

  Then, as shown in FIG. 7, the magnet 6a and the coil 6c of the image blur correction driving unit 6 generate a driving force F1 acting in the direction of a straight line connecting the magnet 6a and the center O of the lens R, thereby holding the lens. The frame 20 is moved with respect to the movable frame 10 in the direction in which the driving force F1 acts. The magnet 6b and the coil 6d of the image blur correction driving unit 6 generate a driving force F2 that works in the direction of a straight line connecting the magnet 6b and the center O, and the driving force F2 is applied to the lens holding frame 20 with respect to the movable frame 10. Move in the working direction. By the movement of the lens holding frame 20 in the direction in which the driving forces F1 and F2 work, the position of the optical axis C is moved to a fixed position, and camera shake is corrected.

  As described above, in the lens driving device 1, the flexible FPC 7 has the first extension extending along the surface 10 s extending in the direction perpendicular to the optical axis C in the movable frame 10 as shown in FIG. 9. And a second extending portion 7g that extends in the direction of the optical axis C and is connected to an end of the first extending portion 7e opposite to the movable frame side fixed portion 7d. . The first extending portion 7e extending in the direction orthogonal to the optical axis C is fixed to the movable frame 10, and the second extending portion 7g extending in the optical axis C direction is as shown in FIG. It is fixed to the base portion 3. Therefore, the first extending portion 7e and the second extending portion 7g form a right angle, and the first extending portion 7e and the second extending portion 7g are along the movable frame 10 and the base portion 3. Therefore, the space occupied by the FPC 7 in the apparatus can be reduced as compared with the conventional FPC. Therefore, since the arrangement space of the FPC 7 that must be secured can be reduced, the apparatus can be miniaturized.

  In addition, since the first extending portion 7e having the movable frame side fixing portion 7d and the second extending portion 7g having the base side fixing portion 7m form a right angle, the tensile force is applied at the right angle portion. By working, the first extending portion 7e is difficult to rotate on a plane orthogonal to the optical axis C. Thus, since the first extending portion 7e and the second extending portion 7g are orthogonal to each other, a force in the rotational direction on the plane orthogonal to the optical axis C is not easily applied to the movable frame 10. Yes. Therefore, since the occurrence of the situation in which the movable frame 10 deviates from the trajectory in the optical axis C direction can be suppressed, the movement of the movable frame 10 in the optical axis C direction with respect to the base portion 3 can be stabilized.

  In the FPC 7, the movable frame side fixed portion 7d is located at the first corner 10t of the surface 10s extending in the direction orthogonal to the optical axis C of the movable frame 10, and the first extending portion 7e is a coil. The first corner portion 10t on the loading portion 10b side extends beyond the second corner portion 10u opposite to the first corner portion 10t. Therefore, the 1st extension part 7e can be arrange | positioned long on the movable frame 10, the movable frame side fixing | fixed part 7d in the 1st extension part 7e, and the base side fixing | fixed part in the 2nd extension part 7g The distance with 7m can be lengthened. Thus, since the position of the movable frame side fixed portion 7d is away from the base side fixed portion 7m, the movable frame 10 rotates around the fixed portion when the movable frame 10 is moved in the optical axis C direction with respect to the base portion 3. The force in the direction of rotation is difficult to work. Therefore, the possibility that the movable frame 10 moves out of the path in the direction of the optical axis C can be avoided, so that the movement of the movable frame 10 relative to the base portion 3 can be stabilized. Further, in the FPC 7, the first and second extending portions 7e and 7g are composed of first and second branch portions 7a and 7b extending in a bifurcated manner from the power supply base portion 7p. Therefore, the extending portions 7e and 7g provided on the first and second branch portions 7a and 7b can be bent independently of each other.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  In the movable frame side fixed portion 7d of the FPC 7, the coils 6c and 6d are loaded into the coil loading portion 10b of the movable frame 10, whereby the FPC 7 is fixed to the movable frame 10, and the base side fixed portion 7m of the FPC 7 has a second extension. The FPC 7 was fixed to the base portion 3 by sandwiching the portion 7 g between the locking projections 3 g of the base portion 3. However, it is not restricted to these fixing methods, For example, you may fix by adhesion | attachment, solder, etc.

  Further, the FPC 7 that supplies a drive signal to the coils 6c and 6d of the image blur correction drive unit 6 has been described. However, the present invention may be applied to the FPC 5 that supplies a drive signal to the coil 4a of the focus adjustment drive unit 4. Is possible. Further, the magnets 4d, 4e, 4f of the focus adjustment drive unit 4 are arranged on the movable frame 10, and the coil 4a and the yoke 16 of the focus adjustment drive unit 4 are arranged on the base unit 3, but the magnets 4d, 4e, 4f are arranged. The drive signal may be supplied to the coil 4a of the focus adjustment drive unit 4 by reversing the arrangement relationship between the coil 4a and the yoke 16.

  Further, although the FPC 7 that is a plate-like flexible member has been described, it may not be a plate-like FPC, and may be, for example, a wire having a linear shape.

DESCRIPTION OF SYMBOLS 1 ... Lens drive device, 3 ... Base part, 6 ... Drive part, 7 ... FPC (power feeding part), 7a, 7b ... Branch part, 7d ... Movable frame side fixing | fixed part (1st fixing | fixed part), 7e ... 1st 7g ... second extending portion, 7k ... third extending portion, 7m ... base side fixing portion (second fixing portion), 7p ... feed base, 10 ... movable frame, 10b ... coil Loading unit, 10s ... surface, 10t, 10u ... corner, C ... optical axis, R ... lens.

Claims (3)

In a lens driving device comprising: a movable frame that supports the lens and is movably supported in the direction of the optical axis with respect to the base portion; and a drive unit provided in the movable frame.
A flexible power supply unit that supplies a drive signal to the drive unit;
The movable frame has a substantially rectangular shape in a plane perpendicular to the optical axis,
The power feeding unit is
From the first fixing portion whose one end is fixed to the movable frame, a first extending portion extending along the surface interlinking straight in the optical axis in said movable frame,
One end side is connected to the other end of the first extending portion, extending in the direction of the optical axis, a second extension having a second fixing portion to which the other end side is fixed to the base portion comprising a stationary part, a
The first fixed portion is located on the surface corresponding to the first corner of the movable frame having the quadrangular shape, and the other end side of the first extending portion is the quadrangular shape. Extending beyond a second corner opposite the first corner of the movable frame comprising
The first corner and the second corner are in contact with the same side of the movable frame,
A lens driving device. The first and second extending portions are composed of first and second branch portions extending in a bifurcated manner from the power supply base,
The surface of the movable frame that extends in the direction perpendicular to the optical axis is provided with a coil loading unit that loads the coil of the driving unit,
The coil is fixed to the surface side corresponding to the movable frame in the first and second branch portions,
2. The lens driving device according to claim 1, wherein the first fixed portion is formed by loading the coil into the coil loading portion of the movable frame. The first branch portion extends along one side in contact with the first corner of the movable frame having the quadrangular shape,
The lens driving device according to claim 2, wherein the second branch portion extends along a side symmetrical to the one side with respect to the optical axis.

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