Optical unit with shake correction function

Abstract

An optical unit is provided with: a movable body (2) having a holder (20) for holding a camera module (16); a rotation support mechanism (3) that rotatably supports the movable body; a swing support mechanism (4) that swingably supports the rotary support mechanism; and a pressing mechanism (7) that generates a magnetic attraction force in the optical axis direction. The rotary support mechanism includes: a first frame (31) fixed to the object side of the holder; a second frame (32) disposed on the image side of the holder and supported by the swing support mechanism so as to be rotatable about a first axis; a flat plate-shaped first plate spring (33) connecting the first frame and the second frame in the optical axis direction; and a plurality of rolling bodies (38) rolling between the holder and the second frame. The pressurizing mechanism includes: a pressurizing magnet disposed on the holder; and a magnetic body disposed on the holder and attracted by the pressurizing magnet. The rolling body is sandwiched between the holder and the second frame in the optical axis direction by a magnetic attraction force generated by the pressing mechanism.

Description

Technical Field

[0001] This invention relates to an optical unit with jitter correction function. Background Technology

[0002] Some optical units mounted on portable terminals or mobile objects include mechanisms that correct shake by swinging or rotating a movable body on which the optical module is mounted, so as to suppress distortion of captured images when the portable terminal or mobile object moves. Patent Document 1 discloses such an optical unit with shake correction function.

[0003] The optical unit with jitter correction function in Patent Document 1 includes: a movable body having a camera module; a first intermediate component that holds the movable body in a rotatable position; a second intermediate component that holds the first intermediate component in a rotatable position; a fixed body that holds the second intermediate component in a rotatable position; a first rotation mechanism that rotates the movable body relative to the first intermediate component about the optical axis of the camera module; a second rotation mechanism that rotates the movable body relative to the fixed body; and a plurality of spring portions connecting the movable body and the first intermediate component. Each spring portion includes a flat first leaf spring that can elastically deform in the rotational direction of the movable body relative to the first intermediate component. The first leaf spring connects the movable body and the first intermediate component in the optical axis direction. Existing technical documents Patent documents

[0004] Patent Document 1: Japanese Patent Application Publication No. 2021-139990 Summary of the Invention

[0005] In the optical unit with jitter correction function in Patent Document 1, a first leaf spring connects the movable body and the first intermediate component in the optical axis direction. Therefore, the movable body is in a floating state relative to the first intermediate component, and the first leaf spring also elastically deforms in the optical axis direction. As a result, there is a problem that the attitude of the movable body in the optical axis direction is difficult to stabilize.

[0006] In view of the above problems, the object of the present invention is to provide an optical unit with jitter correction function, which can stabilize the posture of the movable body in the optical axis direction even if the movable body and the first intermediate component are connected in the optical axis direction by a first leaf spring.

[0007] To address the above problems, one aspect of the optical unit with jitter correction function of the present invention includes: A movable body, comprising a camera module and a frame-shaped retainer for holding the camera module; A rotating support mechanism that supports the movable body so that it can rotate about the optical axis of the camera module. A swing support mechanism that supports the rotary support mechanism so that it can rotate about a first axis intersecting the optical axis, and supports the rotary support mechanism so that it can rotate about a second axis intersecting the optical axis and the first axis; A fixed body that supports the movable body via the swing support mechanism; A magnetic drive mechanism for oscillation, which generates a magnetic force for oscillating the movable body relative to the fixed body; A magnetic drive mechanism for rotation, which generates a magnetic force for rotating the movable body relative to the fixed body about the optical axis; and The pressurizing mechanism generates a magnetic attraction force along the optical axis. One side along the optical axis is designated as the object side, and the other side as the image side. The rotating support mechanism includes: a first frame fixed to one of the object side and the image side of the retainer; a second frame disposed on the other of the object side and the image side of the retainer and supported by the swing support mechanism to be rotatable about the first axis; a flat first leaf spring connecting the first frame and the second frame in the optical axis direction and elastically deformable about the optical axis; and a plurality of rolling elements that roll between the retainer and the second frame. The pressurizing mechanism includes: a pressurizing magnet disposed on one of the retainer and the second frame; and a magnetic body disposed on the other of the retainer and the second frame, and attracted by the pressurizing magnet. The rolling element is held by the retainer and the second frame in the optical axis direction by the magnetic attraction generated by the pressurizing mechanism. Attached Figure Description

[0008] Figure 1 This is a perspective view of the optical unit in this embodiment. Figure 2 This is a perspective view of the optical unit of this embodiment, in which the first cover has been removed. Figure 3 yes Figure 1 An exploded 3D diagram. Figure 4 It is an exploded three-dimensional view of the rotary support mechanism and the swing support mechanism. Figure 5 This is an exploded three-dimensional view of the rotating support mechanism as seen from the object side. Figure 6 This is an exploded three-dimensional view of the rotating support mechanism as seen from the image side. Figure 7 This is a top view of the casing. Figure 8 This is a top view of the second frame. Figure 9 This is a diagram illustrating the first leaf spring. Figure 10 It is along Figure 4 A cross-sectional view along line AA. Figure 11 This is a diagram illustrating the first leaf spring in a modified example. Detailed Implementation

[0009] Hereinafter, embodiments of the optical unit with jitter correction function of the present invention will be described with reference to the accompanying drawings.

[0010] Figure 1 This is a perspective view of the optical unit in this embodiment. Figure 2 This is a perspective view of the optical unit of this embodiment, in which the first cover has been removed. Figure 3 yes Figure 2 An exploded 3D diagram. Figure 4 It is an exploded three-dimensional view of the rotary support mechanism and the swing support mechanism. Figure 5 This is an exploded three-dimensional view of the rotating support mechanism as seen from the object side. Figure 6 This is an exploded three-dimensional view of the rotating support mechanism as seen from the image side. Figure 7 This is a top view of the casing. Figure 8 This is a top view of the second frame. Figure 9 This is a diagram illustrating the first leaf spring. Figure 10 It is along Figure 4 A cross-sectional view along line AA.

[0011] like Figure 1 As shown, the optical unit 100 (an optical unit with shake correction function) includes a camera module 16. The optical unit 100 can be used in optical devices such as mobile phones with cameras, dashcams, and motion cameras and wearable cameras mounted on moving objects such as helmets, bicycles, and remote-controlled helicopters. In such optical devices, if the optical device shakes during shooting, the captured image will be distorted. To prevent the captured image from tilting, the optical unit 100 corrects the tilt of the camera module 16 based on acceleration, angular velocity, and the amount of shake detected by a gyroscope or other detection device.

[0012] like Figure 2 As shown, the optical unit 100 rotates the camera module 16 about a first axis R1 orthogonal to the optical axis L of the camera module 16, and rotates the camera module 16 about a second axis R2 orthogonal to both the optical axis L and the first axis R1, thereby performing shake correction. Additionally, the optical unit 100 rotates the camera module 16 about the optical axis L, thereby performing shake correction. In this embodiment, the optical unit 100 performs pitch correction, yaw correction, and roll correction.

[0013] In the following description, the three mutually orthogonal axes are referred to as the X-axis, Y-axis, and Z-axis. The Z-axis coincides with the optical axis L. Along the Z-axis, direction Z1 is on one side of the optical axis, i.e., the object side of the imaging module 16, and direction Z2 is on the other side of the optical axis, i.e., the image side of the imaging module 16. When the plane containing the X-axis and Y-axis is defined as the XY plane, the first axis R1 and the second axis R2 are located on the XY plane. The first axis R1 and the second axis R2 are tilted at 45 degrees relative to the X-axis and Y-axis, respectively.

[0014] like Figure 2 and Figure 3 As shown, the optical unit 100 includes: a movable body 2 having a camera module 16; a rotation support mechanism 3 supporting the movable body 2 so that it can rotate about the optical axis L; a swing support mechanism 4 supporting the rotation support mechanism 3 so that it can swing; a swing magnetic drive mechanism 5 that generates magnetic force to swing the movable body 2; a rotation magnetic drive mechanism 6 that generates magnetic force to rotate the movable body 2; a pressure mechanism 7 that generates magnetic attraction in the direction of the optical axis; a fixed body 8 that supports the movable body 2 through the swing support mechanism 4; and flexible printed circuit boards 14 and 15.

[0015] like Figure 3 As shown, the camera module 16 includes: a lens barrel 161 for holding a lens; a rectangular main body 162 for holding the lens barrel 161; and a substrate 163 on which an imaging element is mounted. The flexible printed circuit board 14 is electrically connected to the substrate 163.

[0016] like Figures 3 to 6 As shown, the movable body 2 includes a camera module 16 and a frame-shaped retainer 20 that holds the camera module 16 inside. Figure 2 As shown, the lens barrel 161 protrudes from the center of the retainer 20 in the Z1 direction. The retainer 20 is made of resin. The retainer 20 includes: a first sidewall portion 21 and a second sidewall portion 22 arranged along the X-axis; and a third sidewall portion 23 and a fourth sidewall portion 24 arranged along the Y-axis. The second sidewall portion 22 is located in the X2 direction of the first sidewall portion 21. The fourth sidewall portion 24 is located in the Y2 direction of the third sidewall portion 23.

[0017] A first protrusion 25 protruding from the first end face 27 in the Z1 direction is provided on the retainer 20. Two first protrusions 25 are provided at the center of each of the four sides of the first end face 27. A second protrusion 26 protruding from the second end face 28 in the Z2 direction is provided on the retainer 20. The second protrusions 26 are formed near the four corners of the retainer 20.

[0018] like Figure 3As shown, the fixed body 8 includes: a rectangular shell 9 surrounding the outer periphery of the movable body 2; a first cover 10 covering the shell 9 from the Z1 direction; and a second cover 11 covering the shell 9 from the Z2 direction. The shell 9 is made of resin. The shell 9 includes: a first sidewall portion 91 and a second sidewall portion 92 arranged along the X-axis direction; and a third sidewall portion 93 and a fourth sidewall portion 94 arranged along the Y-axis direction. The second sidewall portion 92 is located in the X2 direction of the first sidewall portion 91. Both the first cover 10 and the second cover 11 are made of metal. Figure 1 As shown, the lens tube 161 protrudes from the opening in the center of the first cover 10.

[0019] like Figure 2 and Figure 4 As shown, the swing support mechanism 4 supports the rotary support mechanism 3 so that it can rotate about the first axis R1, and also supports the rotary support mechanism 3 so that it can rotate about the second axis R2. Figure 4 As shown, the swing support mechanism 4 includes a universal joint 41, a first connecting portion 42, and a second connecting portion 43. The universal joint 41 is made of metal leaf springs. The universal joint 41 includes: a frame-shaped main body 411; a pair of first arms 412 extending toward the Z2 direction on both sides of the main body 411 along the first axis direction of the first axis R1; and a pair of second arms 415 extending toward the Z2 direction on both sides of the main body 411 along the second axis direction of the second axis R2.

[0020] The main body 411 is located in the Z1 direction of the movable body 2. The lens tube 161 protrudes from the opening in the center of the main body 411. A recess 413 is formed at the front end of the first arm 412, which is recessed inward in the radial direction centered on the optical axis L. A recess 416 is formed at the front end of the second arm 415, which is recessed in the radial direction centered on the optical axis L.

[0021] The first connecting part 42 is made of metal. For example... Figure 4 , Figure 5 , Figure 8 As shown, the first connecting part 42 has two parts, which connect the movable body 2 and the first arm 412 in a way that allows them to rotate around the first axis R1. Figure 5 and Figure 8 As shown, the first connecting portion 42 is fixed to a first curved portion 362 located at a corner of the second frame 32 in the first axial direction. The first connecting portion 42 includes a protrusion 421 that projects radially inward. The protrusion 421 is embedded in a recess 413. Thus, the first arm 412 is supported by the protrusion 421 and is rotatable.

[0022] The second connecting part 43 is made of metal. For example... Figure 4 , Figure 7 As shown, there are two second connecting parts 43, which connect the fixing body 8 and the second arm 415 so that they can rotate around the second axis R2. Figure 7 As shown, the second connecting portion 43 is held by a retaining portion 98 formed at the inner corner of the second axial direction of the housing 9. The second connecting portion 43 includes a protrusion 431 that protrudes radially inward. The protrusion 431 is supported by a recess 416 to be rotatable. Thus, the second arm 415 is supported by the protrusion 431 to be rotatable.

[0023] like Figures 4 to 6 As shown, the rotating support mechanism 3 includes: a first frame 31 fixed in the Z1 direction of the retainer 20; a second frame 32 disposed in the Z2 direction of the retainer 20 and supported by the swing support mechanism 4 to be rotatable about a first axis R1; a flat first leaf spring 33 connecting the first frame 31 and the second frame 32 in the optical axis direction and elastically deformable about the optical axis L; a limiting frame 34 disposed in the Z1 direction of the movable body 2 and forming a gap with the movable body 2 in the optical axis direction; a plurality of rolling elements 38 sandwiched between the retainer 20 and the second frame 32 in the optical axis direction and rolling between the retainer 20 and the second frame 32; and a limiting part 39 for limiting the movable range of the movable body 2 relative to the second frame 32 in a plane orthogonal to the optical axis L.

[0024] like Figure 5 and Figure 6 As shown, the first frame 31 includes a flat first plate portion 35, which is fixed to the first end face 27 in the Z1 direction of the retainer 20. The first plate portion 35 is made of a metal leaf spring. The first plate portion 35 includes: a rectangular frame portion 351; and spring retaining portions 352 protruding from both sides of the frame portion 351 along a first axial direction and a second axial direction. The frame portion 351 is fixed to the first end face 27 of the retainer 20 by adhesive or the like. Four spring retaining portions 352 are provided at 90° intervals around the optical axis L. The spring retaining portions 352 retain the Z1 direction end of the first leaf spring 33. The spring retaining portions 352 correspond to the second leaf spring of the present invention.

[0025] like Figure 5 , Figure 6 As shown, the second frame 32 includes: a second flat plate portion 37 disposed in the Z2 direction of the retainer 20; and a support frame 36 disposed in the Z2 direction of the second flat plate portion 37. The second flat plate portion 37 is made of a metal leaf spring. The second flat plate portion 37 includes: a rectangular frame portion 371; and spring retaining portions 372 protruding from both sides of the frame portion 371 along a first axial direction and a second axial direction. The frame portion 371 is fixed to the surface of the support frame 36 in the Z1 direction by an adhesive or the like. Four spring retaining portions 372 are provided at 90° intervals around the optical axis L. The spring retaining portions 372 retain the Z2 direction end of the first leaf spring 33. The spring retaining portions 372 correspond to the second leaf spring of the present invention.

[0026] The support frame 36 is made of plate components of magnetic metal. For example... Figure 5 , Figure 6 As shown, the support frame 36 includes: a rectangular frame portion 361; first curved portions 362 bending from both sides of the frame portion 361 along a first axial direction toward the Z1 direction; and second curved portions 363 bending from both sides of the frame portion 361 along a second axial direction toward the Z1 direction. Second cutouts 364 corresponding to the second protrusions 26 are formed near the four corners of the frame portion 361. Figure 5 and Figure 8 As shown, the first connecting part 42 is fixed to the outer peripheral surface of the first bent part 362 by welding.

[0027] The first leaf spring 33 is made of metal. For example... Figures 4 to 6 As shown, the first leaf spring 33 is flat, and its thickness direction is a predetermined direction orthogonal to the optical axis L. Four first leaf springs 33 are arranged around the optical axis L at 90° intervals. Figure 9 As shown, the first leaf spring 33 includes: a first connecting portion 331 disposed in the Z1 direction; a second connecting portion 332 disposed in the Z2 direction; and a meandering portion 333 that is connected at one end to the first connecting portion 331 and at the other end to the second connecting portion 332 and meanders along the optical axis.

[0028] The first connecting portion 331 is fixed to the spring retaining portion 352 by welding or the like, while being sandwiched in a slit formed in the spring retaining portion 352. The second connecting portion 332 is fixed to the spring retaining portion 372 by welding or the like, while being sandwiched in a slit formed in the spring retaining portion 372. The meandering portion 333 meanders back and forth in a direction orthogonal to the optical axis L. The meandering portion 333 includes: a plurality of straight portions 334 that extend linearly in a direction orthogonal to the optical axis L; and an arc portion 335 that connects the ends of adjacent straight portions 334.

[0029] The limiting frame 34 is made of a plate component of non-magnetic metal. For example... Figures 4 to 6 As shown, the limiting frame 34 has a first cutout 341 formed at the center of its four sides. The corner portions 342 of the limiting frame 34 are fixed to the front ends of the first curved portion 362 and the second curved portion 363 by welding or the like. Here, when the retainer 20 of the movable body 2 moves in the Z1 direction, the retainer 20 contacts the limiting frame 34, thereby limiting the movable range of the movable body 2 in the Z1 direction. Therefore, even if an impact is applied to the optical unit 100 along the optical axis and the movable body 2 moves relative to the second frame 32 in the Z1 direction, plastic deformation of the first leaf spring 33 and the spring retainers 352 and 372 can be suppressed.

[0030] The rolling element 38 is a metal ball. For example... Figure 5 , Figure 6 , Figure 10As shown, three rolling elements 38 are provided. The three rolling elements 38 are arranged at approximately equal angular intervals around the optical axis L. The rolling elements 38 are housed in a ball receiving portion 29 formed on the second end face 28 of the retainer 20. The ball receiving portion 29 is an elongated hole extending along the retainer 20.

[0031] The limiting part 39 is composed of a first protrusion 25, a second protrusion 26, a first cutout 341, and a second cutout 364. When the first protrusion 25 and the second protrusion 26 move in a direction orthogonal to the optical axis L, they contact the first cutout 341 and the second cutout 364 respectively, thereby limiting the range of motion of the movable body 2 relative to the second frame 32. Thus, even if an impact orthogonal to the optical axis L is applied to the optical unit 100, and the movable body 2 moves relative to the second frame 32 in a direction orthogonal to the optical axis L, plastic deformation of the first leaf spring 33 can be suppressed.

[0032] The oscillating magnetic drive mechanism 5 generates magnetic force, causing the movable body 2 to oscillate relative to the fixed body 8, thus tilting the optical axis L in any direction. For example... Figures 3 to 6 As shown, the swing magnetic drive mechanism 5 includes: a first swing magnet 51 fixed to the first side wall portion 21 of the retainer 20; a first swing coil 52 fixed to the fixing body 8 and opposite to the first swing magnet 51; a second swing magnet 53 fixed to the third side wall portion 23 of the retainer 20; and a second swing coil 54 fixed to the fixing body 8 and opposite to the second swing magnet 53.

[0033] The first oscillating magnet 51 is fixed to the inwardly recessed portion 201 of the first sidewall portion 21. The second oscillating magnet 53 is fixed to the inwardly recessed portion 202 of the third sidewall portion 23. The first oscillating coil 52 is fixed to the coil fixing hole 95 penetrating the first sidewall portion 91 of the housing 9. The second oscillating coil 54 is fixed to the coil fixing hole 96 penetrating the third sidewall portion 93 of the housing 9. Here, a plate member 171 made of magnetic material is disposed between the first oscillating magnet 51 and the first oscillating coil 52. The plate member 171 is fixed to the inner surface of the first sidewall portion 91. In addition, a plate member 172 made of magnetic material is disposed between the second oscillating magnet 53 and the second oscillating coil 54. The plate member 172 is fixed to the inner surface of the third sidewall portion 93.

[0034] like Figures 3 to 6 As shown, the rotating magnetic drive mechanism 6 includes: a rotating magnet 61 fixed to the second sidewall portion 22 of the retaining member 20; and a rotating coil 62 fixed to the fixing body 8 and opposite to the rotating magnet 61. The rotating magnet 61 is fixed to the inwardly recessed portion 203 of the second sidewall portion 22. The rotating coil 62 is fixed to the coil fixing hole 97 penetrating the second sidewall portion 92 of the housing 9.

[0035] The first oscillation coil 52, the second oscillation coil 54, and the rotation coil 62 are electrically connected to the flexible printed circuit board 15. The flexible printed circuit board 15 is fixed to the outer peripheral surface of the housing 9. Here, as... Figure 3 As shown, the flexible printed circuit board 15 is fixed with plate components 181 and 182 made of magnetic material. Plate component 181 is fixed to the side opposite to the side where the first oscillating coil 52 is fixed. Plate component 182 is fixed to the side opposite to the side where the second oscillating coil 54 is fixed. The movable body 2 is positioned relative to the fixed body 8 at a predetermined reference position using the magnetic attraction between the first oscillating magnet 51 and plate component 181, and the magnetic attraction between the second oscillating magnet 53 and plate component 182. That is, plate components 181 and 182 maintain the posture of the movable body 2 when no current is supplied to the first oscillating coil 52 and the second oscillating coil 54.

[0036] like Figure 5 and Figure 6 As shown, the pressurizing mechanism 7 includes: a first oscillating magnet 51, a second oscillating magnet 53, and a rotating magnet 61, all disposed on the holding member 20, serving as pressurizing magnets; and a support frame 36, a magnetic element, disposed on the second frame. The support frame 36 is magnetically attracted by the first oscillating magnet 51, the second oscillating magnet 53, and the rotating magnet 61. Thus, as... Figure 10 As shown, the rolling elements 38 are clamped between the retainer 20 and the second plate portion 37 by the magnetic attraction generated by the pressure mechanism 7. When the movable body 2 rotates about the optical axis L, the three rolling elements 38 roll between the retainer 20 and the second plate portion 37. Here, the length dimension of the ball receiving portion 29 is set such that the rolling elements 38 do not contact the movable body 2 within its movable range in a plane orthogonal to the optical axis L.

[0037] (Effects) According to the optical unit 100 of this embodiment, the movable body 2 is pressed against the second frame 32 via the rolling element 38 by the magnetic attraction of the pressing mechanism 7. Thus, the movable body 2 is supported by the rolling element 38 in the optical axis direction, the first leaf spring 33 is less likely to deflect in the optical axis direction, and the movable body 2 maintains a stable posture in the optical axis direction. Furthermore, since the movable body 2 is supported by the rolling element 38, the movable body 2 can easily rotate about the optical axis L relative to the second frame 32.

[0038] The oscillating magnetic drive mechanism 5 includes: a first oscillating magnet 51 fixed to the holding member 20; a first oscillating coil 52 fixed to the housing 9 and radially opposite to the first oscillating magnet 51; a second oscillating magnet 53 fixed to the holding member 20; and a second oscillating coil 54 fixed to the housing 9 and radially opposite to the second oscillating magnet 53. The rotating magnetic drive mechanism 6 includes: a rotating magnet 61 fixed to the holding member 20; and a rotating coil 62 fixed to the housing 9 and radially opposite to the rotating magnet 61. The pressure magnet includes the first oscillating magnet 51, the second oscillating magnet 53, and the rotating magnet 61. The magnetic body is a support frame 36 fixed to the second frame 32. Therefore, since the first oscillating magnet 51, the second oscillating magnet 53, and the rotating magnet 61 are used as pressure magnets, the component cost of the optical unit 100 can be reduced compared to the case where a separate pressure magnet is provided.

[0039] Four first leaf springs 33 are arranged at 90° intervals around the optical axis L. Each first leaf spring 33 includes: a first connecting portion 331 disposed on the object side; a second connecting portion 332 disposed on the image side; and a meandering portion 333 that is connected at one end to the first connecting portion 331 and the other end to the second connecting portion 332, extending along the optical axis while meandering. Therefore, since four first leaf springs 33 are arranged at 90° intervals around the optical axis L, the movable body 2 can rotate stably around the optical axis L. Furthermore, since the first leaf springs 33 include the meandering portion 333, the first leaf springs 33 can easily and stably undergo elastic deformation around the optical axis L.

[0040] The first frame 31 includes a flat first plate portion 35, which is fixed to a first end face 27 in the Z1 direction of the movable body 2. The second frame 32 includes a flat second plate portion 37, which is disposed in the Z2 direction of the movable body 2. A first leaf spring 33 connects the first plate portion 35 and the second plate portion 37. The portions of the first plate portion 35 and the second plate portion 37 connected to the first leaf spring 33 include spring retainers 352 and 372, which are elastically deformable in the optical axis direction and serve as second leaf springs. Thus, when the movable body 2 moves along the optical axis direction, the spring retainers 352 and 372 elastically deform along the optical axis direction, thereby suppressing excessive load on the first leaf spring 33.

[0041] The rotating support mechanism 3 includes a limiting frame 34, which is configured in the Z1 direction of the movable body 2 with a gap forming with the movable body 2 in the optical axis direction. When the movable body 2 moves in the Z1 direction, it contacts the limiting frame 34, thereby limiting the range of motion in the Z1 direction. As a result, even if an impact is applied to the optical unit 100, plastic deformation of the first leaf spring 33 and the spring retaining portions 352 and 372 in the optical axis direction can be suppressed.

[0042] The rotating support mechanism 3 includes a limiting portion 39 for limiting the range of motion of the movable body 2 relative to the second frame 32 in a plane orthogonal to the optical axis L. The limiting portion 39 includes: a first protrusion 25 protruding from the retainer toward the limiting frame 34; and a first cutout 341 formed in the limiting frame 34, which contacts the first protrusion 25 when the body moves in a direction orthogonal to the optical axis L. Thus, even if an impact is applied to the optical unit 100, plastic deformation of the first leaf spring 33 and the spring retainers 352 and 372 in a direction orthogonal to the optical axis L can be suppressed.

[0043] The limiting portion 39 includes: a second protrusion 26 that protrudes from the retainer 20 toward the second frame 32; and a second cutout 364 formed in the support frame 36 of the second frame 32, which contacts the second protrusion 26 when the second protrusion 26 moves in a direction orthogonal to the optical axis L. Thus, even if an impact is applied to the optical unit 100, plastic deformation of the first leaf spring 33 and the spring retainers 352 and 372 in a direction orthogonal to the optical axis L can be suppressed.

[0044] (The first leaf spring in the variation) Figure 11 This is a diagram illustrating the first leaf spring 33A in a modified example. (See diagram for example.) Figure 11 As shown, the modified first leaf spring 33A includes: a first connecting portion 331 disposed in the Z1 direction; a second connecting portion 332 disposed in the Z2 direction; and a meandering portion 333, one end of which is connected to the first connecting portion 331 and the other end of which is connected to the second connecting portion 332, and extends in the optical axis direction while meandering. The first connecting portion 331 is fixed to the spring retainer 352 by welding or the like, in a state of being clamped in a slit formed in the spring retainer 352. The second connecting portion 332 is fixed to the spring retainer 372 by welding or the like, in a state of being clamped in a slit formed in the spring retainer 372. The meandering portion 333 meanders back and forth in the optical axis direction. The meandering portion 333 includes: a plurality of straight portions 334 extending linearly in the optical axis direction; and arcuate portions 335 connecting the ends of adjacent straight portions 334. Thus, since the straight portions 334 extend linearly in the optical axis direction, the movable body 2 can rotate more easily about the optical axis L.

[0045] (Other implementation methods) In the above embodiment, the first swing magnet 51, the second swing magnet 53, and the rotation magnet 61 are used as pressure magnets. However, in other embodiments, a separate pressure magnet may be provided in the holding member 20. Alternatively, the pressure magnet may be disposed in the second frame, and the magnetic body may be disposed in the holding member 20.

[0046] In other embodiments, only one of the first plate portion 35 and the second plate portion 37 may include a spring retaining portion serving as a second leaf spring. In other embodiments, neither the first plate portion 35 nor the second plate portion 37 may include a spring retaining portion serving as a second leaf spring.

[0047] This technology can be configured as follows.

[0048] (1) An optical unit with jitter correction function, comprising: A movable body, comprising a camera module and a frame-shaped retainer for holding the camera module; A rotating support mechanism that supports the movable body so that it can rotate about the optical axis of the camera module. A swing support mechanism that supports the rotary support mechanism so that it can rotate about a first axis intersecting the optical axis, and supports the rotary support mechanism so that it can rotate about a second axis intersecting the optical axis and the first axis; A fixed body that supports the movable body via the swing support mechanism; A magnetic drive mechanism for oscillation, which generates a magnetic force for oscillating the movable body relative to the fixed body; A magnetic drive mechanism for rotation, which generates a magnetic force for rotating the movable body relative to the fixed body about the optical axis; and The pressurizing mechanism generates a magnetic attraction force along the optical axis. One side along the optical axis is designated as the object side, and the other side as the image side. The rotating support mechanism includes: a first frame fixed to one of the object side and the image side of the retainer; a second frame disposed on the other of the object side and the image side of the retainer and supported by the swing support mechanism to be rotatable about the first axis; a flat first leaf spring connecting the first frame and the second frame in the optical axis direction and elastically deformable about the optical axis; and a plurality of rolling elements that roll between the retainer and the second frame. The pressurizing mechanism includes: a pressurizing magnet disposed on one of the retainer and the second frame; and a magnetic body disposed on the other of the retainer and the second frame, and attracted by the pressurizing magnet. The rolling element is held by the retainer and the second frame in the optical axis direction by the magnetic attraction generated by the pressurizing mechanism.

[0049] (2) The optical unit with jitter correction function according to (1), wherein, The oscillating magnetic drive mechanism includes: an oscillating magnet fixed to the holding member; and an oscillating coil fixed to the fixing body and radially opposite to the oscillating magnet. The rotating magnetic drive mechanism includes: a rotating magnet fixed to the holding member; and a rotating coil fixed to the fixing body and radially opposite to the rotating magnet, wherein the pressure magnet is at least one of the oscillating magnet and the rotating magnet. The magnet is fixed to the second frame.

[0050] (3) The optical unit with jitter correction function according to (1) or (2), wherein, The first leaf spring has four leaf springs arranged at 90° intervals around the optical axis. The first leaf spring includes: a first connecting portion disposed on the object side; a second connecting portion disposed on the image side; and a meandering portion that is connected at one end to the first connecting portion, at the other end to the second connecting portion, and extends along the optical axis while meandering.

[0051] (4) The optical unit with jitter correction function according to any one of (1) to (3), wherein, The first frame includes a flat first plate portion, which is fixed to one of the object side and the image side of the movable body. The second frame includes a flat, second plate portion disposed on the other side of the movable body, either the object side or the image side. The first leaf spring connects the first flat plate portion and the second flat plate portion. At least one of the first plate portion and the second plate portion includes a second leaf spring in the portion connected to the first leaf spring, the second leaf spring being elastically deformable in the direction of the optical axis.

[0052] (5) The optical unit with jitter correction function according to any one of (1) to (4), wherein, The rotating support mechanism includes a limiting frame configured to form a gap with the movable body on one of the object side and the image side of the movable body in the optical axis direction. When the movable body moves toward either the object side or the image side, it restricts the range of motion of either the object side or the image side by contacting the limiting frame.

[0053] (6) The optical unit with jitter correction function according to (5), wherein, The rotating support mechanism includes a limiting part for limiting the range of motion of the movable body relative to the second frame in a plane orthogonal to the optical axis.

[0054] (7) The optical unit with jitter correction function according to (6), wherein, The limiting portion includes: a first protrusion that protrudes from the retainer toward the limiting frame; and a first cutout that is formed in the limiting frame and contacts the first protrusion when the first protrusion moves in a direction orthogonal to the optical axis.

[0055] (8) The optical unit with jitter correction function according to (6) or (7), wherein, The limiting portion includes: a second protrusion that protrudes from the retainer toward the second frame; and a second cutout that is formed in the second frame and contacts the second protrusion when the second protrusion moves in a direction orthogonal to the optical axis. Symbol Explanation

[0056] 100...Optical unit, 2...Moveable body, 3...Rotary support mechanism, 4...Swing support mechanism, 5...Swing magnetic drive mechanism, 6...Rotary magnetic drive mechanism, 7...Pressure mechanism, 8...Fixed body, 9...Housing, 10...First cover, 11...Second cover, 14...Flexible printed circuit board, 15...Flexible printed circuit board, 16...Camera module, 20...Retaining member, 21...First sidewall portion, 22...Second sidewall portion, 23...Third sidewall portion, 24...Fourth sidewall portion, 25...First protrusion, 26. 27...Second protrusion, 28...First end face, 29...Second end face, 30...Ball receiving part, 31...First frame, 32...Second frame, 33, 33A...First leaf spring, 34...Restriction frame, 35...First flat plate part, 36...Support frame, 37...Second flat plate part, 38...Rolling element, 39...Restriction part, 41...Universal frame, 42...First connecting part, 43...Second connecting part, 51...First swing magnet, 52...First swing coil, 53...Second swing magnet, 54...Second swing wire 61... Rotating magnet, 62... Rotating coil, 91... First sidewall portion, 92... Second sidewall portion, 93... Third sidewall portion, 94... Fourth sidewall portion, 95, 96, 97... Coil fixing hole, 98... Holding portion, 161... Lens barrel, 162... Main body portion, 163... Substrate, 171, 172... Plate component, 181, 182... Plate component, 201, 202, 203... Recess, 331... First connecting portion, 332... Second connecting portion, 333... Winding portion, 334... Straight portion , 335...arc portion, 341...first cut portion, 342...corner portion, 351...frame portion, 352...spring retaining portion, 361...frame portion, 362...first curved portion, 363...second curved portion, 364...second cut portion, 371...frame portion, 372...spring retaining portion, 411...main body portion, 412...first arm, 413...recess, 415...second arm, 416...recess, 421...protrusion, 431...protrusion, L...optical axis, R1...first axis, R2...second axis.

Claims

1. An optical unit with jitter correction function, characterized in that, including: a movable body including a camera module and a frame-shaped holder holding the camera module; a rotation support mechanism that supports the movable body so as to be rotatable about an optical axis of the camera module; a swing support mechanism that supports the rotation support mechanism so as to be rotatable about a first axis intersecting the optical axis, and supports the rotation support mechanism so as to be rotatable about a second axis intersecting the optical axis and the first axis; a fixed body that supports the movable body through the swing support mechanism; a swing magnetic drive mechanism that generates a magnetic force for swinging the movable body relative to the fixed body; a rotation magnetic drive mechanism that generates a magnetic force for rotating the movable body relative to the fixed body about the optical axis; and a press mechanism that generates a magnetic attractive force in an optical axis direction along the optical axis, one side of the optical axis direction is set as an object side, and the other side is set as an image side, the rotation support mechanism includes: a first frame fixed to one of the object side and the image side of the holder; a second frame disposed on the other of the object side and the image side of the holder and supported by the swing support mechanism so as to be rotatable about the first axis; a first plate spring in a flat plate shape that connects the first frame and the second frame in the optical axis direction and is elastically deformable about the optical axis; and a plurality of rolling bodies that roll between the holder and the second frame, the press mechanism includes: a press magnet disposed on one of the holder and the second frame; and a magnetic body disposed on the other of the holder and the second frame and attracted by the press magnet, the rolling bodies are clamped by the holder and the second frame in the optical axis direction by the magnetic attractive force generated by the press mechanism.

2. The optical unit with shake correction function according to claim 1, wherein the swing magnetic drive mechanism includes: a swing magnet fixed to the holder; and a swing coil fixed to the fixed body and opposed to the swing magnet in a radial direction, the rotation magnetic drive mechanism includes: a rotation magnet fixed to the holder; and a rotation coil fixed to the fixed body and opposed to the rotation magnet in a radial direction, the press magnet is at least one of the swing magnet and the rotation magnet, the magnetic body is fixed to the second frame.

3. The optical unit with shake correction function according to claim 1 or 2, wherein the first plate spring is provided with four at an interval of 90° about the optical axis, The first plate spring includes a first connecting portion disposed on the object side, a second connecting portion disposed on the image side, and a meandering portion having one end connected to the first connecting portion and the other end connected to the second connecting portion, and extending in the optical axis direction while meandering.

4. The optical unit with shake correction function according to claim 1, wherein The first frame includes a first flat plate portion in a flat plate shape fixed to a surface of one of the object side and the image side of the movable body, The second frame includes a second flat plate portion in a flat plate shape disposed on the other of the object side and the image side of the movable body, The first plate spring connects the first flat plate portion and the second flat plate portion, At least one of the first flat plate portion and the second flat plate portion includes a second plate spring elastically deformable in the optical axis direction at a portion connected to the first plate spring.

5. The optical unit with shake correction function according to claim 1, wherein The rotation support mechanism includes a restriction frame disposed on one of the object side and the image side of the movable body in a state where a gap is formed between the movable body and the restriction frame in the optical axis direction, The movable body restricts a movable range of one of the object side and the image side by contacting the restriction frame when moving toward one of the object side and the image side.

6. The optical unit with shake correction function according to claim 5, wherein The rotation support mechanism includes a restriction portion for restricting a movable range of the movable body with respect to the second frame in a plane orthogonal to the optical axis.

7. The optical unit with shake correction function according to claim 6, wherein The restriction portion includes a first protrusion portion protruding from the holding member toward the restriction frame, and a first cutout portion formed in the restriction frame and contacting the first protrusion portion when the first protrusion portion moves in a direction orthogonal to the optical axis.

8. The optical unit with shake correction function according to claim 6 or 7, wherein The restriction portion includes a second protrusion portion protruding from the holding member toward the second frame, and a second cutout portion formed in the second frame and contacting the second protrusion portion when the second protrusion portion moves in a direction orthogonal to the optical axis.

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