Optical unit with shake correction function

Abstract

To reduce the number of components and a size of a movable body, and prevent magnetic interference with a lens drive mechanism of an optical module.SOLUTION: A movable body 5 of an optical unit 1 with a shake correction function comprises: an optical module 4; and a first metal member 11 and a second metal member 12 fixed to an outer peripheral surface of the optical module 4. The first metal member 11 is magnetic metal, and is fixed to a side face in a -X direction and a side face in a -Y direction of the optical module 4 to be a yoke for a magnet of a drive mechanism 6 for shake correction. The second metal member 12 is formed of non-magnetic metal, and is fixed to a side face in a +X direction and a side face in a +Y direction of the optical module 4. A lens drive mechanism 17 of the optical module 4 is arranged on a side where the second metal member 12 is located with respect to an optical axis L (+X direction). The first metal member 11 and the second metal member 12 are each provided with a first connection mechanism 71 that connects a gimbal frame 70 and the movable body 5 to each other rotatably around a first axis.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an optical unit with a shake correction function that performs shake correction by swinging an optical module. [Background technology]

[0002] Some optical units mounted on mobile terminals or mobile objects are equipped with a mechanism for correcting shake by swinging or rotating a movable body on which the optical module is mounted in order to suppress distortion of captured images when the mobile terminal or mobile object is moving. Patent Document 1 discloses this type of optical unit with a shake correction function.

[0003] The optical unit with shake correction function of Patent Document 1 has a movable body equipped with a camera module (optical module), a fixed body, a swing support mechanism that supports the movable body relative to the fixed body so that it can rotate around rotation axes (X-axis and Y-axis) that intersect with the optical axis, and a swing magnetic drive mechanism that swings the movable body. The movable body has a resin holder that holds the camera module. A magnet of the swing magnetic drive mechanism is fixed to the side of the holder via a metal yoke. In addition, a metal part (thrust bearing member) for connecting the gimbal frame of the swing support mechanism is fixed to a diagonal position of the holder. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-063971 Summary of the Invention [Problem to be solved by the invention]

[0005] The movable body of Patent Document 1 has a holder, which is a separate part from the exterior case, arranged outside the exterior case of the camera module. Therefore, the side of the movable body has a structure in which parts are overlapped in two layers. The holder, which is a part on the outer periphery, is made of resin, and therefore requires a large plate thickness to ensure strength. Furthermore, at diagonal positions of the holder, there are recesses that hold metal parts (thrust support members) for connecting the gimbal frame, and a metal plate that functions as a yoke for the magnet is fixed to the side where the magnet of the shake correction drive mechanism is fixed. Therefore, there is a limit to how small the outer dimensions of the movable body can be. Furthermore, the metal parts and yoke for connecting the gimbal frame are separate parts from the holder. This results in a large number of parts and a lot of assembly labor.

[0006] Furthermore, the movable body of Patent Document 1 includes a camera module equipped with a lens drive mechanism that adjusts the lens position, and a movable body (lens barrel) that holds the lens group is held inside the exterior case so that it can move in the optical axis direction. Here, if the magnets of the magnetic drive mechanism for image stabilization were fixed directly to the exterior case of the camera module, and metal parts for connecting the gimbal frame were fixed at diagonal positions on the exterior case, the number of parts could be reduced and the outer dimensions of the movable body could be made smaller. However, in order to provide the yoke function, the exterior case would need to be made of magnetic metal, which would pose a problem of magnetic interference between the exterior case and the magnets of the lens drive mechanism.

[0007] In view of these points, the object of the present invention is to reduce the number of parts and size of the movable body, thereby reducing the product size of the optical unit with shake correction function, and suppressing magnetic interference with the lens driving mechanism provided in the optical module. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, an optical unit with shake correction function of the present invention includes a movable body having an optical module, a fixed body, a gimbal mechanism that supports the movable body relative to the fixed body so as to be swingable about a first axis intersecting an optical axis of the optical module and supports the movable body so as to be swingable about a second axis intersecting the optical axis and the first axis, and a shake correction drive mechanism that swings the movable body about the first axis and the second axis, the gimbal mechanism includes a gimbal frame, a first connection mechanism that connects the movable body and the gimbal frame so as to be rotatable about the first axis, and a second connection mechanism that connects the fixed body and the gimbal frame so as to be rotatable about the second axis, an outer peripheral surface of the optical module includes a first side surface and a third side surface that face each other in a first direction that intersects the optical axis, and a second side surface and a fourth side surface that face each other in a second direction that intersects the optical axis and intersects the first direction, and the movable body is the optical module comprises a first metal member having a first plate portion fixed to the first side surface, a second plate portion fixed to the second side surface, and a first bent portion connecting the first plate portion and the second plate portion; and a second metal member having a third plate portion fixed to the third side surface, a fourth plate portion fixed to the fourth side surface, and a second bent portion connecting the third plate portion and the fourth plate portion, wherein the first connection mechanism is provided at the first bent portion and the second bent portion arranged at diagonal positions in the first axial direction of the movable body, the first metal member being made of a magnetic metal, and magnets of the shake correction drive mechanism being fixed to the first side surface and the second side surface via the first plate portion and the second plate portion, the optical module comprising a movable body having a lens and a lens drive mechanism that moves the movable body in the optical axis direction, the second metal member being made of a non-magnetic metal, and the lens drive mechanism being arranged on the side of the optical axis where the second metal member is located.

[0009] According to the present invention, the first connection mechanism of the gimbal mechanism can be configured using a first metal member and a second metal member attached to the outer peripheral surface of the optical module. The first metal member is made of a magnetic metal and functions as a yoke for the magnet of the shake correction drive mechanism. This eliminates the need for a resin part holder, thereby reducing the outer size of the movable body. Furthermore, if a metal part for connecting the gimbal frame were directly attached to a diagonal position of the optical module, an attachment margin would be required for the metal part. However, in the present invention, the yoke and metal part are integrated, eliminating the attachment margin. The second metal member has a similar configuration. Therefore, the diagonal size of the movable body can be reduced. Furthermore, the number of parts can be reduced, and assembly labor can be reduced. Furthermore, the lens drive mechanism is positioned on the side where the second metal member is located relative to the optical axis. However, because the second metal member is made of a nonmagnetic metal, magnetic interference between the second metal member and the lens drive mechanism can be avoided. Furthermore, the side where the second metal member is located is different from the side where the magnet and the first metal member are located. Therefore, magnetic interference between the lens driving mechanism and the first metal member can be avoided, and magnetic interference between the lens driving mechanism and the magnets arranged on the surface of the first metal member can also be avoided.

[0010] In the present invention, it is preferable that the optical module includes an exterior case made of a non-magnetic metal, and the first metal member and the second metal member are fixed to the exterior case. By making the exterior case non-magnetic, it is possible to prevent the magnet of the lens drive mechanism from being attracted to the exterior case and immobilizing the moving body. Furthermore, by using a metal exterior case, strength can be ensured even with a thin plate thickness. Therefore, the moving body can be made smaller while ensuring strength.

[0011] In the present invention, it is preferable that the movable body faces an opening provided in the exterior case in the optical axis direction, and the edge of the opening faces the movable body in the optical axis direction to prevent the movable body from jumping out of the opening. In this way, when an impact is applied due to a fall or the like, it is possible to prevent the movable body from falling out of the exterior case and damaging the optical module.

[0012] In the present invention, the exterior case has a fifth side surface and a sixth side surface that face each other in the first axial direction, the fifth side surface connects the first side surface and the second side surface, and the sixth side surface connects the third side surface and the fourth side surface, the first bent portion has a pair of first arm portions that extend from ends of the first plate portion and the second plate portion on the fifth side surface side to one side in the first axial direction, and a first connecting plate portion that connects the pair of first arm portions on the outer circumferential side of the fifth side surface, Preferably, the gimbal frame includes a pair of second arms extending from an end of the sixth side surface toward the other side in the first axis direction and a second connecting plate connecting the pair of second arms on the outer periphery of the sixth side surface, wherein each of the first connecting plate and the second connecting plate is provided with one of a sphere, a convex curved surface protruding in the first axis direction, and a concave curved surface recessed in the first axis direction, and the first connection mechanism is configured by point contact between the sphere, the convex curved surface, or the concave curved surface and the gimbal frame on the first axis. This configuration allows the first connection mechanism to be configured by inserting the end of the gimbal frame into the gap between the exterior case and the metal member, thereby facilitating assembly of the gimbal mechanism. Furthermore, the movable body has a shape with chamfered diagonal corners, and the first connection mechanism is provided at the chamfered points, thereby reducing the diagonal dimensions of the movable body and the gimbal mechanism.

[0013] In the present invention, the first metal member and the second metal member preferably have metal member-side positioning holes that overlap with case-side positioning holes provided in the outer case. This allows for accurate positioning when the first metal member and the second metal member are fixed to the outer case by welding or the like. This improves the positional accuracy of the first metal member and the second metal member. This also improves the ease of assembly when assembling the movable body.

[0014] In the present invention, the first plate portion and the second plate portion preferably include a positioning portion for positioning the magnet in the optical axis direction, thereby improving the positioning accuracy of the magnet.

[0015] In the present invention, it is preferable that one side in the optical axis direction coincides with the subject side of the optical module, the fixed body includes a base that covers the movable body from the other side in the optical axis direction, and at least one of the first metal member and the second metal member includes a stopper portion that extends further toward the other side than the end of the optical module on the other side in the optical axis direction. In this way, it is possible to prevent the optical module from colliding with the base when an impact is applied due to being dropped, etc.

[0016] In the present invention, the flexible printed circuit board is preferably included, the flexible printed circuit board being pulled out from the movable body, and a reinforcing plate fixed to the flexible printed circuit board. One of the third and fourth plate portions includes a notch cut out in the optical axis direction, a pair of locking plates provided on both sides of the notch in the circumferential direction, and a presser plate extending from an edge of the notch in the optical axis direction toward the outer periphery. The reinforcing plate is held in an upright position in the optical axis direction by having both ends extending on both sides of the notch in the circumferential direction locked by the pair of locking plates. The flexible printed circuit board extends in the optical axis direction together with the reinforcing plate and is then bent toward the outer periphery along the presser plate. This allows the flexible printed circuit board to be raised from the position where it is pulled out from the movable body to the position of the presser plate, and the flexible printed circuit board can be pulled out toward the outer periphery after being raised to an appropriate position. Furthermore, because it is only necessary to lock the reinforcing plate to the locking plate, the flexible printed circuit board can be easily pulled out from the appropriate position.

[0017] In the present invention, it is preferable that the position of the pressing plate in the optical axis direction is closer to the center of swing of the movable body than the pull-out position where the flexible printed circuit board is pulled out from the movable body. In this way, when the movable body swings, the flexible printed circuit board is prevented from swinging. The flexible printed circuit board bends at a position close to the center. This reduces the spring constant of the flexible printed circuit board, thereby reducing the swing load on the movable body. [Effects of the Invention]

[0018] According to the present invention, the first connection mechanism of the gimbal mechanism can be configured using a first metal member and a second metal member attached to the outer peripheral surface of the optical module. The first metal member is made of a magnetic metal and functions as a yoke for the magnet of the shake correction drive mechanism. This eliminates the need for a resin part holder, thereby reducing the outer size of the movable body. Furthermore, if a metal part for connecting the gimbal frame were directly attached to a diagonal position of the optical module, an attachment margin would be required for the metal part. However, in the present invention, the yoke and metal part are integrated, eliminating the attachment margin. The second metal member has a similar configuration. Therefore, the diagonal size of the movable body can be reduced. Furthermore, the number of parts can be reduced, and assembly labor can be reduced. Furthermore, the lens drive mechanism is positioned on the side where the second metal member is located with respect to the optical axis, but because the second metal member is made of a non-magnetic metal, magnetic interference between the second metal member and the lens drive mechanism can be avoided. Furthermore, the first metal member made of a magnetic metal is positioned on the opposite side of the optical axis from the lens drive mechanism and is separated from the lens drive mechanism. Therefore, magnetic interference between the lens driving mechanism and the first metal member can be avoided, and magnetic interference between the lens driving mechanism and the magnets arranged on the surface of the first metal member can also be avoided. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view of an optical unit with a shake correction function to which the present invention is applied. [Figure 2] FIG. 2 is an exploded perspective view of the optical unit with shake correction function shown in FIG. [Figure 3] FIG. 2 is a cross-sectional view of the optical unit with shake correction function cut along the XY plane. [Figure 4] FIG. 2 is a cross-sectional view of the optical unit with shake correction function cut along the XZ plane. [Figure 5] FIG. [Figure 6] FIG. [Figure 7]FIG. 2 is a plan view of the outer case, the first metal member, and the second metal member. [Figure 8] FIG. 2 is an exploded perspective view of an outer case, a first metal member, and a second metal member. DETAILED DESCRIPTION OF THE INVENTION

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical unit with a shake correction function to which the present invention is applied will be described below with reference to the drawings.

[0021] (Overall composition) Fig. 1 is a perspective view of an optical unit 1 with shake correction function to which the present invention is applied. Fig. 2 is an exploded perspective view of the optical unit 1 with shake correction function of Fig. 1. Fig. 3 is a cross-sectional view of the optical unit 1 with shake correction function cut in the XY plane, taken at the height of the oscillation center P of the movable body 5. Fig. 4 is a cross-sectional view of the optical unit 1 with shake correction function cut in the XZ plane, taken at the position of the optical axis L.

[0022] The optical unit 1 with image stabilization function has an optical module 4 equipped with a lens 2 and a substrate 3 on which an imaging element is mounted. The optical unit 1 with image stabilization function is used in optical devices such as camera-equipped mobile phones and dashcams, as well as in optical devices such as action cameras and wearable cameras mounted on moving objects such as helmets, bicycles, and radio-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 being tilted, the optical unit 1 with image stabilization function corrects the tilt of the optical module 4 based on the acceleration, angular velocity, amount of shake, etc. detected by a detection means such as a gyroscope.

[0023] The optical unit 1 with shake correction function is aligned perpendicular to the optical axis L of the lens 2 of the optical module 4. Shake correction is performed by rotating the optical module 4 around a first axis R1 (see FIGS. 2 and 3) that intersects with the optical axis L and the first axis R1, and by rotating the optical module 4 around a second axis R2 that is perpendicular to the optical axis L and the first axis R1. The optical unit 1 with shake correction function of this embodiment performs pitching correction and yawing correction.

[0024] 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. If the plane including the X-axis and Y-axis is defined as the XY plane, the first axis R1 and the second axis R2 lie on the XY plane. The first axis R1 and the second axis R2 are inclined at 45 degrees with respect to the X-axis and Y-axis.

[0025] In the following description, the directions along the X-axis, Y-axis, and Z-axis are referred to as the X-axis, Y-axis, and Z-axis directions. One side of the X-axis direction is referred to as the -X direction, and the other side as the +X direction. One side of the Y-axis direction is referred to as the -Y direction, and the other side as the +Y direction. One side of the Z-axis direction is referred to as the -Z direction, and the other side as the +Z direction. The X-axis direction is the first direction, and the Y-axis direction is the second direction. The Z-axis direction is the optical axis direction along the optical axis L. The +Z direction is one side of the optical axis direction, which is the subject side of the optical module 4. The -Z direction is the other side of the optical axis direction, which is the image side of the optical module 4. In addition, the direction along the first axis R1 is referred to as the first axis direction, and the direction along the second axis R2 is referred to as the second axis direction.

[0026] As shown in FIGS. 1 to 4, optical unit 1 with shake correction function includes movable body 5 having optical module 4, gimbal mechanism 7, fixed body 8 that supports movable body 5 via gimbal mechanism 7, shake correction drive mechanism 6 that oscillates movable body 5, and flexible printed circuit boards 9 and 10. Flexible printed circuit board 9 is connected to movable body 5. Flexible printed circuit board 10, which supplies power to shake correction drive mechanism 6, is fixed to fixed body 8.

[0027] The gimbal mechanism 7 is a swing support mechanism that supports the movable body 5 so that it can swing about a first axis R1 and a second axis R2. The movable body 5 can rotate in the pitch direction about the X axis and in the yaw direction about the Y axis by combining the rotation about the first axis R1 and the rotation about the second axis R2.

[0028] The shake correction drive mechanism 6 includes a first shake correction drive mechanism 6X that generates a drive force about the X axis to the movable body 5, and a second shake correction drive mechanism 6Y that generates a drive force about the Y axis to the movable body 5. As shown in FIG. 4 , in this embodiment, the first shake correction drive mechanism 6X is disposed in the −Y direction of the movable body 5. The second shake correction drive mechanism 6Y is disposed in the −X direction of the movable body 5.

[0029] (movable body) 2, the movable body 5 includes an optical module 4, and a first metal member 11 and a second metal member 12 fixed to the outer peripheral surface of the optical module 4. The optical module 4 includes an exterior case 13 to which the first metal member 11 and the second metal member 12 are fixed, and a lens barrel 14 that protrudes in the +Z direction from an opening 13a provided in the exterior case 13, and the lens 2 is held by the lens barrel 14. A substrate 3 is disposed at the end of the optical module 4 in the -Z direction. A flexible printed circuit board 9 is connected to the substrate 3 on which the imaging element is mounted, and is drawn out in the +X direction from the end of the optical module 4 in the -Z direction.

[0030] As shown in FIG. 3, a first magnet 61X is arranged on the side surface of the movable body 5 facing the -Y direction. A second magnet 61Y is arranged on the side surface of the movable body 5 facing the -X direction. The first magnet 61X and the second magnet 61Y are polarized and magnetized in the Z-axis direction. The first magnet 61X and the second magnet 61Y are fixed to the side surface of the outer case 13 via a first metal member 11. The outer case 13 is made of a non-magnetic metal, and the first metal member 11 is made of a magnetic metal. Therefore, the first metal member 11 functions as a yoke for the first magnet 61X and the second magnet 61Y. Meanwhile, the first The metal member 12 is made of a non-magnetic metal.

[0031] (fixed body) As shown in Figures 2 and 4, fixed body 8 includes case 20 that surrounds the outer periphery of movable body 5, base 21 that is fixed to case 20 from the -Z direction, and cover 22 that covers case 20 from the +Z direction. Case 20 is made of resin, and base 21 and cover 22 are made of metal. Case 20 is housed between base 21 and cover 22. As shown in Figures 1 and 4, movable body 5 and a portion of gimbal mechanism 7 protrude in the +Z direction from opening 22a of cover 22.

[0032] Case 20 includes a frame 23 that surrounds movable body 5 and a wiring accommodating portion 24 that extends in the +X direction from frame 23. Frame 23 includes a first side wall 25 that extends in the Y-axis direction in the +X direction of movable body 5. As shown in FIG. 4, flexible printed circuit board 9 is drawn out in the +X direction from a notch 26 provided in first side wall 25, is housed between base 21 and wiring accommodating portion 24, and is drawn out from wiring accommodating portion 24 in the -Y direction (see FIG. 1).

[0033] As shown in FIG. 3, a first coil 62X is arranged on the side surface of the frame 23 facing the -Y direction. A second coil 62Y is arranged on the side surface of the frame 23 facing the -X direction. As shown in FIG. 2, the first coil 62X and the second coil 62Y are arranged in coil arrangement holes 27 and 28 provided in the frame 23. The first coil 62X and the second coil 62Y are oval air-core coils that are long in the circumferential direction. The first coil 62X and the second coil 62Y are electrically connected to the flexible printed circuit board 10. The flexible printed circuit board 10 is routed along the side surface of the frame 23 facing the -X direction and the side surface of the frame 23 facing the -Y direction.

[0034] (Gimbal mechanism) As shown in FIGS. 2 and 3, the gimbal mechanism 7 includes a gimbal frame 70, a first connection mechanism 71, and a second connection mechanism 72. The first connection mechanism 71 connects the gimbal frame 70 and the movable body 5 at a diagonal position in the first axial direction of the movable body 5 so as to be rotatable about a first axis R1. The second connection mechanism 72 connects the gimbal frame 70 and the case 20 at a diagonal position in the second axial direction of the frame portion 23 of the fixed body 8 so as to be rotatable about a second axis R2. When the gimbal mechanism 7 is configured, the movable body 5 becomes oscillating about an oscillation center P (see FIGS. 3 and 4), which is the intersection point of the optical axis L, the first axis R1, and the second axis R2.

[0035] 2, the gimbal frame 70 includes a gimbal frame main body 74 having an opening 73 in which the barrel 14 of the optical module 4 is disposed, a pair of first extension portions 75 that protrude from the gimbal frame main body 74 toward both sides in the first axial direction and extend in the −Z direction, and a pair of second extension portions 76 that protrude from the gimbal frame main body 74 toward both sides in the second axial direction and extend in the −Z direction.

[0036] The first connection mechanism 71 is composed of a pair of contact points 77 provided at diagonal corners of the movable body 5 in the first axis direction and a pair of first extension portions 75 provided on the gimbal frame 70. As will be described later, in the first connection mechanism 71, one of the pair of contact points 77 is provided on the first metal member 11, and the other of the pair of contact points 77 is provided on the second metal member 12. Each contact point 77 includes a metal sphere 79 (see FIG. 3 ). Meanwhile, the tip of each first extension portion 75 is provided with a concave curved surface that is recessed radially inward. The first connection mechanism 71 is configured by inserting the first extension portions 75 into the gap between the first metal member 11 and the outer peripheral surface of the optical module 4 and the gap between the second metal member 12 and the outer peripheral surface of the optical module 4, respectively, and bringing the concave curved surfaces and the spheres 79 into point contact on the first axis R1.

[0037] The second connection mechanism 72 is a pair of gimbal frames fixed to diagonal corners of the frame 23 in the second axis direction. The second connection mechanism 72 is formed by a frame support member 29 and a pair of second extension portions 76 provided on the gimbal frame 70. Each gimbal frame support member 29 has a sphere 30. Meanwhile, each second extension portion 76 has a concave curved surface that is recessed radially inward. The second extension portion 76 is inserted into the gap between each gimbal frame support member 29 and the case 20, and the convex curved surface (the surface of the sphere 30) is brought into point contact with the concave curved surface on the second axis R2, thereby forming the second connection mechanism 72.

[0038] (Shake correction drive mechanism) When the gimbal mechanism 7 is configured, the first magnet 61X fixed to the side surface of the movable body 5 in the -Y direction and the first coil 62X fixed to the case 20 face each other in the Y-axis direction, constituting a first shake correction drive mechanism 6X (see FIG. 3). Therefore, when power is supplied to the first coil 62X, the movable body 5 rotates around the X-axis. Also, the second magnet 61Y fixed to the side surface of the movable body 5 in the -X direction and the second coil 62Y fixed to the case 20 face each other in the X-axis direction, constituting a second shake correction drive mechanism 6Y (see FIG. 3). Therefore, when power is supplied to the second coil 62Y, the movable body 5 rotates around the Y-axis. The shake correction drive mechanism 6 rotates the movable body 5 around the first axis R1 and the second axis R2 by combining the rotation of the movable body 5 around the X axis by the first shake correction drive mechanism 6X and the rotation of the movable body 5 around the Y axis by the second shake correction drive mechanism 6Y.

[0039] (Optical module) FIG. 5 is a perspective view of the movable body 5. FIG. 6 is an exploded perspective view of the movable body 5. FIG. 7 is a plan view of the exterior case 13, the first metal member 11, and the second metal member 12. FIG. 8 is an exploded perspective view of the exterior case 13, the first metal member 11, and the second metal member 12. As shown in FIGS. 4 and 6, the optical module 4 includes an exterior case 13, a support 15 fixed to the inside of the exterior case 13, a movable body 16 including a lens 2 and a lens barrel 14, and a lens drive mechanism 17 that moves the movable body 16 in the optical axis direction relative to the support 15. A substrate 3 is disposed at the end of the support 15 in the -Z direction.

[0040] The exterior case 13 includes a body 18 that surrounds the outer periphery of the support 15, and an end plate 19 that extends inward from the end of the body 18 in the +Z direction. An opening 13a is provided in the center of the end plate 19. As shown in FIGS. 4 and 5, the inner peripheral edge of the opening 13a faces the outer peripheral portion of the movable body 16 in the optical axis direction. Therefore, the end plate 19 functions as a position restricting portion that restricts the movable body 16 from jumping out of the opening 13a in the +Z direction.

[0041] The lens driving mechanism 17 is a magnetic driving mechanism. As shown in FIGS. 4 and 6, the lens driving mechanism 17 includes a magnet 171 disposed on the movable body 16 and a coil 172 disposed on the support 15. A substrate 173 connected to the coil 172 is disposed on the side of the support 15 facing the +X direction. A yoke 174 is placed on the magnet 171 on the side opposite the coil 172. The magnet 171 and the coil 172 extend in the Y-axis direction and face each other in the X-axis direction. The magnet 171 is polarized in the Z-axis direction. In this embodiment, the exterior case 13 of the optical module 4 is made of a non-magnetic metal as described above. This prevents the magnet 171 of the lens driving mechanism 17 from being attracted to the exterior case 13.

[0042] Lens driving mechanism 17 is disposed in the +X direction with respect to optical axis L of optical module 4. On the other hand, shake correction driving mechanism 6 is disposed on the −X direction side and −Y direction side of movable body 5, and is disposed in the −X direction and Y direction with respect to optical axis L. Therefore, lens driving mechanism 17 and shake correction driving mechanism 6 are disposed on different sides with respect to optical axis L.

[0043] 5, the optical module 4 has diagonal corners in the first and second axis directions chamfered, and is octagonal when viewed from the Z axis direction. The outer peripheral surface of the optical module 4 has a first side surface 41 and a third side surface 43 that face each other in the X axis direction (first direction), and a second side surface 44 that faces each other in the Y axis direction (second direction). The optical module 4 has a second side surface 42 and a fourth side surface 44 that face each other. The first side surface 41 faces the -X direction, the second side surface 42 faces the -Y direction, the third side surface 43 faces the +X direction, and the fourth side surface 44 faces the +Y direction. The outer peripheral surface of the optical module 4 also has a fifth side surface 45 and a sixth side surface 46 that face each other in the first axial direction, and a seventh side surface 47 and an eighth side surface 48 that face each other in the second axial direction. The fifth side surface 45 is located between the first side surface 41 and the second side surface 42. The sixth side surface 46 is located between the third side surface 43 and the fourth side surface 44.

[0044] (Metal parts) 5, 6, 7, and 8, the first metal member 11 is disposed on the outer peripheral sides of the first side surface 41, the fifth side surface 45, and the second side surface 42 of the optical module 4. The first metal member 11 includes a first plate portion 31 fixed to the first side surface 41, a second plate portion 32 fixed to the second side surface 42, and a first bent portion 33 connecting the first plate portion 31 and the second plate portion 32. The first bent portion 33 is bent into a shape that protrudes radially outward at a diagonal position on one side of the movable body 5 in the first axial direction.

[0045] The first bent portion 33 includes a pair of first arms 34, 35 extending radially outward from the ends of the first plate portion 31 and the second plate portion 32 on the fifth side surface 45 side and generally parallel to one side in the first axial direction, and a first connecting plate portion 36 connecting the tips of the pair of first arms 34, 35. The first connecting plate portion 36 extends linearly in the second axial direction and is spaced apart from the fifth side surface 45.

[0046] In the first metal member 11, the first plate portion 31 functions as a yoke for the first magnet 61X, and the second plate portion 32 functions as a yoke for the second magnet 61Y. The -Z direction ends of the first plate portion 31 and the second plate portion 32 each include a positioning portion 37 that positions the magnets (first magnet 61X, second magnet 61Y) of the shake correction drive mechanism 6 in the optical axis direction. The positioning portion 37 is a bent portion formed by bending the central portions of the -Z direction ends of the first plate portion 31 and the second plate portion 32 toward the outer periphery. The first plate portion 31 and the second plate portion 32 each include a positioning portion 38 that positions the magnets (first magnet 61X, second magnet 61Y) of the shake correction drive mechanism 6 in the circumferential direction. The positioning portion 38 of the first plate portion 31 is a bent portion formed by bending the +Y direction end of the first plate portion 31 toward the outer periphery. The positioning portion 38 of the second plate portion 32 is a bent portion formed by bending the end portion of the second plate portion 32 in the +X direction outward.

[0047] The first side surface 41 and the second side surface 42 on which the first metal member 11 is arranged are the side surfaces in the −X direction and the −Y direction of the optical module 4, and are the side surfaces on the opposite side of the lens driving mechanism 17 from the optical axis L. In other words, the first metal member 11 made of a magnetic metal is attached to the side surface farther from the lens driving mechanism 17.

[0048] The second metal member 12 is disposed on the outer peripheral sides of the third side surface 43, the sixth side surface 46, and the fourth side surface 44 of the optical module 4. The second metal member 12 includes a third plate portion 51 fixed to the third side surface 43, a fourth plate portion 52 fixed to the third side surface 43, and a second bent portion 53 connecting the third plate portion 51 and the fourth plate portion 52. The second bent portion 53 is bent into a shape that protrudes radially outward at a diagonal position in the first axial direction of the movable body 5.

[0049] The second bent portion 53 includes a pair of second arms 54, 55 extending radially outward from the ends of the third plate portion 51 and the fourth plate portion 52 on the sixth side surface 46 side toward the other side in the first axial direction, and a second connecting plate portion 56 connecting the tips of the pair of second arms 54, 55. The second connecting plate portion 56 extends linearly in the second axial direction and is spaced apart from the sixth side surface 46.

[0050] The third plate portion 51 of the second metal member 12 is disposed on the third side surface 43 from which the flexible printed circuit board 9 is drawn out. The third plate portion 51 has a notch 57 formed by cutting out a central portion in the Y-axis direction in the +Z direction, and a pair of locking members disposed on both sides of the notch 57 in the circumferential direction (both sides in the Y-axis direction). The third plate portion 51 includes a locking plate 58 and a pressing plate 59 extending in the +X direction from the +Z-direction edge of the cutout portion 57. The pair of locking plates 58 are each located in the +X direction of the third plate portion 51, and are connected to the third plate portion 51 via connection portions 60 that extend in the +X direction from both ends of the third plate portion 51 in the Y-axis direction. The extension portions that extend from the third plate portion 51 to both sides in the Y-axis direction are bent in the +X direction and then folded back toward the center of the third plate portion 51 in the Y-axis direction, so that the pair of locking plates 58 are positioned opposite the third plate portion 51 in the X-axis direction.

[0051] The first connecting plate portion 36 of the first metal member 11 and the second connecting plate portion 56 of the second metal member 12 are provided with contact portions 77 of a first connection mechanism 71 that connects the gimbal mechanism 7 and the movable body 5. In this embodiment, metal spheres 79 are welded to holes 78 formed on the first axis R1 in the first connecting plate portion 36 and the second connecting plate portion 56. This forms the contact portion 77. In the contact portion 77, the outer peripheral surface of the sphere 79 forms a convex curved surface that faces radially inward.

[0052] The first metal member 11 and the second metal member 12 are fixed to the exterior case 13 by welding. The first metal member 11 and the second metal member 12 each have a metal member-side positioning hole 82 that overlaps with a case-side positioning hole 81 provided in the exterior case 13. One case-side positioning hole 81 is provided at the end of each of the first side surface 41, the second side surface 42, the third side surface 43, and the fourth side surface 44 in the -Z direction. The first metal member 11 has one metal member-side positioning hole 82 that overlaps with the case-side positioning hole 81 provided in each of the first plate portion 31 and the second plate portion 32. Furthermore, the second metal member 12 has one metal member-side positioning hole 82 that overlaps with the case-side positioning hole 81 provided in each of the third plate portion 51 and the fourth plate portion 52.

[0053] The first plate portion 31, the second plate portion 32, and the fourth plate portion 52 have one through hole 83 on each side of the metal member-side positioning hole 82 in the circumferential direction. The +Z direction edge and the edge of the through hole 83 of the first metal member 11 are welded to the outer peripheral surface of the exterior case 13. The +Z direction edge and the edge of the through hole 83 of the second metal member 12 are welded to the outer peripheral surface of the exterior case 13, and the edge of the notch 57 for pulling out the flexible printed circuit board 9 is welded to the outer peripheral surface of the exterior case 13.

[0054] Stopper portions 84 extending in the -Z direction are provided on the -Z direction edges of the first metal member 11 and the second metal member 12. In the first metal member 11, the stopper portions 84 are provided in four locations: on both sides of the positioning portion 37 provided at the -Z direction end of the first plate portion 31 and on both sides of the positioning portion 37 provided at the -Z direction end of the second plate portion 32. In the second metal member 12, the stopper portions 84 are provided in four locations: on both ends in the Y axis direction at the -Z direction end of the third plate portion 51 and on both ends in the X axis direction at the -Z direction end of the fourth plate portion 52. The stopper portions 84 extend further in the -Z direction than the substrate 3 disposed at the -Z direction end of the optical module 4, and face the base 21 that covers the optical module 4 from the -Z direction.

[0055] (flexible printed circuit board) 2 and 4, the flexible printed circuit board 9 includes an extraction section 91 extracted in the +X direction from the bottom of the movable body 5, a rising section 92 rising in the +Z direction from the extraction section 91, a flat section 93 extending in the +X direction from the rising section 92, and a connection section 94 extending in the -Y direction from the flat section 93 and extracted to the outside of the fixed body 8. The connection section 94 is connected to the main body of the optical device in which the optical unit 1 with shake correction function is mounted.

[0056] A reinforcing plate 90 extending in the Y-axis direction is fixed to the rising portion 92 of the flexible printed circuit board 9. Both ends of the reinforcing plate 90 in the Y-axis direction extend on both sides in the circumferential direction of a notch 57 provided in a third plate portion 51 disposed on the third side surface 43 of the optical module 4. As shown, when both ends of the reinforcing plate 90 in the Y-axis direction are inserted between a pair of locking plates 58 and the third plate portion 51 provided on the second metal member 12, the reinforcing plate 90 is pressed against the locking plates 58 by a restoring force that causes the flexible printed circuit board 9 bent in the +Z direction to return to its original shape. As a result, the reinforcing plate 90 and the rising portion 92 are held in a position extending in the optical axis direction. Furthermore, in the +Z direction of the reinforcing plate 90, the flexible printed circuit board 9 extending in the optical axis direction comes into contact with the pressing plate 59 and is bent in the +X direction. As a result, the flat portion 93 is positioned at the height of the pressing plate 59.

[0057] The rising portion 92 of the flexible printed circuit board 9 has a width in the Y-axis direction wider than the reinforcing plate 90. The reinforcing plate 90 is made of a conductive metal, and is fixed to the rising portion 92 by soldering both ends in the Y-axis direction to the surface of the rising portion 92. By soldering the reinforcing plate 90 to the rising portion 92, the GND wiring provided on the flexible printed circuit board 9 is electrically connected to the reinforcing plate 90. As described above, the reinforcing plate 90 is pressed against the locking plate 58 of the second metal member 12, and therefore the second metal member 12 and the GND wiring of the flexible printed circuit board 9 are electrically connected via the reinforcing plate 90. Therefore, the flexible printed circuit board 9 is grounded via the second metal member 12 and the reinforcing plate 90.

[0058] In this embodiment, the flexible printed circuit board 9 has a three-layer laminated structure consisting of a first layer 901, a second layer 902, and a third layer 903, from the lead-out portion 91 to the flat portion 93 (see FIG. 4). The number of layers in the laminated structure is not limited to three. The first layer 901, the second layer 902, and the third layer 903 are all double-sided boards with wiring formed on both sides, but they may also have a configuration in which wiring is formed on only one side. Furthermore, each layer has a non-adhesive region that is not adhered to other layers. For example, the flat portion 93 is a non-adhesive region.

[0059] The flexible printed circuit board 9 includes a fixed portion 95 that is fixed to the fixed body 8. In this embodiment, the fixed portion 95 is provided between the flat portion 93 and the connection portion 94. The fixed portion 95 is made of, for example, a rigid substrate. The flexible printed circuit board 9 is fixed to the fixed body 8 by fixing the fixed portion 95 to the wiring accommodating portion 24.

[0060] As shown in Fig. 4, the flat portion 93 is positioned on an imaginary plane V that passes through the oscillation center P of the movable body 5 and is perpendicular to the optical axis L by a presser plate 59 provided on the second metal member 12. As shown in Fig. 2, the flat portion 93 has an in-plane curved portion 96 that curves within the imaginary plane V. The in-plane curved portion 96 is folded back once in the opposite direction in the Y-axis direction.

[0061] (Main effects of this embodiment) As described above, the optical unit 1 with shake correction function of this embodiment includes the movable body 5 including the optical module 4, the fixed body 8, the gimbal mechanism 7 that supports the movable body 5 relative to the fixed body 8 so that it can swing about a first axis R1 that intersects with the optical axis L of the optical module 4 and that supports the movable body 5 so that it can swing about a second axis R2 that intersects with the optical axis L and the first axis R1, and the shake correction drive mechanism 6 that swings the movable body 5 about the first axis R1 and the second axis R2. The gimbal mechanism 7 includes a gimbal frame 70, a first connection mechanism 71 that connects the movable body 5 and the gimbal frame 70 so that they can rotate about the first axis R1, and a second connection mechanism 72 that connects the fixed body 8 and the gimbal frame 70 so that they can rotate about the second axis R2. The outer peripheral surface of the optical module 4 has a first side surface 41 and a third side surface 43 that face each other in a first direction that intersects with the optical axis L, and a second side surface 42 and a fourth side surface 44 that face each other in a second direction that intersects with the optical axis L and the first direction. The movable body 5 has a first metal member 11 that includes a first plate portion 31 fixed to the first side surface 41, a second plate portion 32 fixed to the second side surface 42, and a first bent portion 33 that connects the first plate portion 31 and the second plate portion 32. The movable body 5 also has a third plate portion 51 fixed to the third side surface 43, a fourth plate portion 52 fixed to the fourth side surface 44, and a second metal member 12 that includes a second bent portion 53 that connects the third plate portion 51 and the fourth plate portion 52. The first connection mechanism 71 is connected to the movable body 5 The first metal member 11 is provided at a first bent portion 33 and a second bent portion 53 arranged at diagonal positions in the first axis direction. The first metal member 11 is made of a magnetic metal, and a first magnet 61X is fixed to the first side surface 41 via a first plate portion 31, and a second magnet 61Y is fixed to the second side surface 42 via a second plate portion 32. The optical module 4 includes a moving body 16 equipped with a lens 2, and a lens driving mechanism 17 that moves the moving body 16 in the optical axis direction. The second metal member 12 is made of a non-magnetic metal, and the lens driving mechanism 17 is arranged on the side of the optical axis L where the second metal member 12 is located (+X direction).

[0062] In this embodiment, the first connection mechanism 71 of the gimbal mechanism 7 can be configured using the first metal member 11 and the second metal member 12 attached to the outer peripheral surface of the optical module 4. The first metal member 11 is made of a magnetic metal and functions as a yoke for the first magnet 61X or the second magnet 61Y of the shake correction drive mechanism 6. This eliminates the need for a conventional resin holder, thereby reducing the outer size of the movable body 5. Furthermore, when attaching metal components for connecting the gimbal frame 70 directly to the optical module 4 at diagonal positions, attachment margins are required for the metal components to abut against the diagonal side surfaces (the fifth side surface 45 and the sixth side surface 46). However, in this embodiment, the yoke and metal components are integrated, eliminating the attachment margins. The second metal member 12 has a similar configuration. This allows the diagonal size of the movable body 5 to be reduced. This also reduces the number of components and the assembly process.

[0063] Furthermore, in this embodiment, the lens driving mechanism 17 is disposed in the +X direction with respect to the optical axis L, on the side where the second metal member 12 is located. However, because the second metal member 12 is made of a non-magnetic metal, magnetic interference with the lens driving mechanism 17 can be avoided. This prevents the magnet 171 of the lens driving mechanism 17 from being attracted to the second metal member 12 and immobilizing the movable body 16. The +X direction is different from the side where the first metal member 11 is disposed (the -X direction and the -Y direction). Therefore, the lens driving mechanism 17 and the first metal member 11 are spaced apart, which prevents magnetic interference between the lens driving mechanism 17 and the first metal member 11. This also prevents magnetic interference between the lens driving mechanism 17 and the magnets (the first magnet 61X and the second magnet 61Y) fixed to the first metal member 11. The lens driving mechanism 17 may be disposed in the +Y direction with respect to the optical axis L, or in a direction intermediate between the +X direction and the +Y direction.

[0064] The optical module 4 of this embodiment includes an exterior case 13 made of a non-magnetic metal, and the first metal member 11 and the second metal member 12 are fixed to the exterior case 13. Making the exterior case 13 non-magnetic prevents the magnet 171 of the lens driving mechanism 17 from being attracted to the exterior case 13 and immobilizing the movable body 16. Furthermore, using a metal exterior case 13 ensures strength even with a thin plate thickness. Therefore, the movable body 5 can be made smaller while still ensuring strength.

[0065] The optical module 4 of this embodiment is equipped with an autofocus mechanism, which moves a moving body 16 equipped with a lens 2 in the optical axis direction. The moving body 16 faces an opening 13a provided in the exterior case 13 in the optical axis direction, and the edge of the opening 13a faces the moving body 16 in the optical axis direction and functions as a position restricting portion that restricts the moving body 16 from jumping out of the opening 13a. Therefore, when an impact is applied due to a fall or the like, it is possible to prevent the moving body 16 from jumping out of the exterior case 13 and breaking the optical module 4.

[0066] In this embodiment, the exterior case 13 of the optical module 4 is octagonal when viewed in the optical axis direction, and has a fifth side surface 45 and a sixth side surface 46 that face each other in the first axis direction. The fifth side surface 45 connects the first side surface 41 and the second side surface 42, and the sixth side surface 46 connects the third side surface 43 and the fourth side surface 44. The first bent portion 33 includes a pair of first arm portions 34, 35 that extend from the ends of the first plate portion 31 and the second plate portion 32 on the fifth side surface 45 side to one side in the first axis direction, and a pair of first arm portions 34, 35 on the outer circumferential side of the fifth side surface 45. The second bent portion 53 has a first connecting plate portion 36 connecting the first arms 34, 35 of the third plate portion 51 and the fourth plate portion 52. The second bent portion 53 has a pair of second arms 54, 55 extending from the ends of the third plate portion 51 and the fourth plate portion 52 on the sixth side surface 46 side toward the other side in the first axis direction, and a second connecting plate portion 56 connecting the pair of second arms 54, 55 on the outer periphery of the sixth side surface 46. A sphere 79 is fixed to each of the first connecting plate portion 36 and the second connecting plate portion 56, and the sphere 79 and a concave curved surface provided on the first extension portion 75 of the gimbal frame 70 come into point contact on the first axis R1, thereby forming the first connection mechanism 71. Therefore, the first connection mechanism 71 can be formed by bending the first extension portion 75 inward and inserting it between the side surface of the exterior case 13 and the metal member, thereby facilitating assembly of the gimbal mechanism 7. Furthermore, the movable body 5 has a shape in which the diagonal corners are chamfered, and the first connection mechanism 71 is provided at the chamfered portion, so that the size of the movable body 5 and the gimbal mechanism 7 in the diagonal direction can be reduced.

[0067] In this embodiment, the spheres 79 are welded to the holes in the first connecting plate 36 and the second connecting plate 56 to form the contact portions 77 that make point contact with the concave curved surface of the gimbal frame 70. However, the contact portions 77 may be formed by pressing the first connecting plate 36 and the second connecting plate 56 to form convex curved surfaces that protrude in the first axial direction. In this embodiment, the outer peripheral surfaces (convex curved surfaces) of the spheres 79 provided on the first connecting plate 36 and the second connecting plate 56 are in point contact with the concave curved surface provided on the gimbal frame 70. However, the convex and concave surfaces may be reversed. That is, the concave curved surfaces that are recessed in the first axial direction provided on the first connecting plate 36 and the second connecting plate 56 may be in point contact with the convex curved surface that protrudes in the first axial direction provided on the gimbal frame 70. When providing the gimbal frame 70 with a convex curved surface, a configuration may be adopted in which metal spheres are welded to the tips of the first extension portion 75 and the second extension portion 76.

[0068] In this embodiment, the first metal member 11 and the second metal member 12 are provided with metal member-side positioning holes 82 that overlap with case-side positioning holes 81 provided in the exterior case 13. Therefore, when fixing the first metal member 11 and the second metal member 12 to the exterior case 13, the positioning work is easy and accurate. In addition, the first plate portion 31 and the second plate portion 32 are each provided with a positioning portion 37 that positions the magnets (first magnet 61X, second magnet 61Y) of the shake correction drive mechanism 6 in the optical axis direction. Therefore, the positioning accuracy of the first magnet 61X or the second magnet 61Y is high.

[0069] In this embodiment, the first metal member 11 and the second metal member 12 have stopper portions 84 that extend further in the -Z direction than the -Z direction ends of the optical module 4. Therefore, when an impact is applied due to a drop or the like, it is possible to prevent the substrate 3 arranged at the bottom of the optical module 4 from colliding with the base 21 that covers the movable body 5 from the -Z direction and being damaged.

[0070] In this embodiment, the flexible printed circuit board 9 is drawn out from the side surface (third side surface 43) of the movable body 5 in the +X direction, and the third plate portion 51 fixed to the third side surface 43 includes a notch portion 57 cut out in the optical axis direction, a pair of locking plates 58 provided on both sides of the notch portion 57 in the circumferential direction, and a presser plate 59 extending from the edge of the notch portion 57 in the optical axis direction toward the outer periphery. Therefore, the flexible printed circuit board 9 can be drawn out from the notch portion 57. Furthermore, by locking both ends in the Y axis direction of the reinforcing plate 90 fixed to the flexible printed circuit board 9 with the pair of locking plates 58, the reinforcing plate 90 is held in an upright position in the optical axis direction. As a result, the flexible printed circuit board 9 extends in the optical axis direction together with the reinforcing plate 90 and is then bent by the presser plate 59 and drawn out in the +X direction. Therefore, the flexible printed circuit board 9 can be drawn out toward the outer periphery after being raised to an appropriate position. Furthermore, since the operation of locking the reinforcing plate 90 to the locking plate 58 is easy, the operation of raising the flexible printed circuit board 9 to an appropriate position and pulling it out is also easy. When pulling out the flexible printed circuit board 9 from the movable body 5 in the +Y direction, a similar holding structure (notch 57, pair of locking plates 58, and pressing plate 59) can be provided in the fourth plate portion 52.

[0071] In this embodiment, the position of the presser plate 59 in the optical axis direction coincides with the position of the oscillation center P of the movable body 5 in the optical axis direction. Therefore, the flexible printed circuit board 9 can be pulled out from the height of the oscillation center P, so that when the flat portion 93 of the flexible printed circuit board 9 bends, it bends on an imaginary plane V including the oscillation center P. Therefore, the spring constant of the flexible printed circuit board 9 is small, and the oscillation load on the movable body 5 is small. Note that the position of the presser plate 59 in the optical axis direction may be closer to the oscillation center P of the movable body 5 than the pull-out position where the flexible printed circuit board 9 is pulled out from the movable body 5. In this way, when the movable body 5 swings, the flexible printed circuit board 9 bends at a position close to the oscillation center P, so the spring constant is small and the oscillation load on the movable body 5 is small.

[0072] (Other embodiments) (1) In the above embodiment, the optical module 4 is equipped with a lens driving mechanism 17 and has an autofocus function that can adjust the lens position. However, the present invention can be applied to an optical unit with a shake correction function that includes an optical module that does not have a lens driving mechanism 17. In this case, since the lens barrel of the optical module is fixed, there is no need to provide a position restriction unit on the exterior case to prevent the lens barrel from falling off. Therefore, the optical module does not need to have a metal exterior case. If the exterior case is omitted, the movable body can be made even smaller.

[0073] (2) In the above embodiment, the movable body 5 is swung in the pitching direction and the yawing direction to correct shake around two axes. However, the present invention is applicable to an optical unit with a shake correction function that swung the movable body 5 around three axes. [Explanation of symbols]

[0074] REFERENCE SIGNS LIST 1...optical unit with shake correction function, 2...lens, 3...substrate, 4...optical module, 5...movable body, 6...shake correction drive mechanism, 6X...first shake correction drive mechanism, 6Y...second shake correction drive mechanism, 7...gimbal mechanism, 8...fixed body, 9, 10...flexible printed circuit board, 11...first metal member, 12...second metal member, 13...exterior case, 13a...opening, 14...lens barrel, 15...support, 16...movable body, 17...lens drive mechanism, 18...body, 19...end plate, 20 ...Case, 21...Base, 22...Cover, 22a...Opening, 23...Frame, 24...Wiring accommodating section, 25...Side wall, 26...Notch, 27, 28...Coil arrangement hole, 29...Gimbal frame receiving member, 30...Sphere, 31...First plate section, 32...Second plate section, 33...First bent section, 34, 35...First arm section, 36...First connecting plate section, 37, 38...Positioning section, 41...First side surface, 42...Second side surface, 43...Third side surface, 44...Fourth side surface, 45...Fifth side surface, 46...Sixth side surface, 47...Seventh Side surface, 48...eighth side surface, 51...third plate portion, 52...fourth plate portion, 53...second bent portion, 54, 55...second arm portion, 56...second connecting plate portion, 57...notch portion, 58...locking plate, 59...pressure plate, 60...connection portion, 61X...first magnet, 61Y...second magnet, 62X...first coil, 62Y...second coil, 70...gimbal frame, 71...first connection mechanism, 72...second connection mechanism, 73...opening, 74...gimbal frame main body portion, 75...first extension portion, 76...second extension portion, 77...contact point portion, 78...hole, 79...sphere, 81...positioning hole on case side, 82...positioning hole on metal member side, 83...through hole, 84...stopper portion, 90...reinforcing plate, 91...drawing portion, 92...rising portion, 93...flat portion, 94...connecting portion, 95...fixed portion, 96...in-plane curved portion, 171...magnet, 172...coil, 173...substrate, 174...yoke, 901...first layer, 902...second layer, 903...third layer, L...optical axis, P...swing center of movable body, R1...first axis, R2...second axis, V...imaginary plane

Claims

1. a movable body including an optical module; A fixed body; a gimbal mechanism that supports the movable body relative to the fixed body so that it can swing about a first axis that intersects with an optical axis of the optical module, and that supports the movable body so that it can swing about a second axis that intersects with the optical axis and the first axis; a shake correction drive mechanism that swings the movable body around the first axis and the second axis, the gimbal mechanism includes a gimbal frame, a first connection mechanism that connects the movable body and the gimbal frame rotatably about the first axis, and a second connection mechanism that connects the fixed body and the gimbal frame rotatably about the second axis, an outer peripheral surface of the optical module includes a first side surface and a third side surface that face each other in a first direction that intersects with the optical axis, and a second side surface and a fourth side surface that face each other in a second direction that intersects with the optical axis and the first direction; The movable body is a first metal member including a first plate portion fixed to the first side surface, a second plate portion fixed to the second side surface, and a first bent portion connecting the first plate portion and the second plate portion; a second metal member including a third plate portion fixed to the third side surface, a fourth plate portion fixed to the fourth side surface, and a second bent portion connecting the third plate portion and the fourth plate portion, the first connection mechanism is provided at the first bent portion and the second bent portion that are arranged at diagonal positions in the first axial direction of the movable body, the first metal member is made of a magnetic metal, and magnets of the shake correction drive mechanism are fixed to the first side surface and the second side surface via the first plate portion and the second plate portion, the optical module includes a movable body having a lens, and a lens driving mechanism that moves the movable body in the optical axis direction; An optical unit with shake correction function, characterized in that the second metal member is made of a non-magnetic metal, and the lens driving mechanism is arranged on the side of the optical axis where the second metal member is located.

2. the optical module includes an exterior case made of a non-magnetic metal; 2. The optical unit with shake correction function according to claim 1, wherein the first metal member and the second metal member are fixed to the exterior case.

3. the movable body faces an opening provided in the exterior case in the optical axis direction, 3. The optical unit with shake correction function according to claim 2, wherein an edge of the opening faces the moving body in the optical axis direction and prevents the moving body from jumping out of the opening.

4. the exterior case includes a fifth side surface and a sixth side surface that face each other in the first axial direction, the fifth side surface connecting the first side surface and the second side surface, and the sixth side surface connecting the third side surface and the fourth side surface, the first bent portion has a pair of first arm portions extending from ends of the first plate portion and the second plate portion on the fifth side surface side toward one side in the first axial direction, and a first connecting plate portion connecting the pair of first arm portions on an outer circumferential side of the fifth side surface, the second bent portion has a pair of second arm portions extending from ends of the third plate portion and the fourth plate portion on the sixth side surface side toward the other side in the first axial direction, and a second connecting plate portion connecting the pair of second arm portions on an outer circumferential side of the sixth side surface, Each of the first connecting plate portion and the second connecting plate portion is provided with one of a sphere, a convex curved surface protruding in the first axial direction, and a concave curved surface recessed in the first axial direction, The optical unit with shake correction function described in claim 2 or 3, characterized in that the first connection mechanism is formed by point contact between the sphere, the convex curved surface, or the concave curved surface and the gimbal frame on the first axis.

5. An optical unit with shake correction function described in any one of claims 2 to 4, characterized in that the first metal member and the second metal member have metal member side positioning holes that overlap with case side positioning holes provided in the outer case.

6. 6. The optical unit with shake correction function according to claim 1, wherein the first plate portion and the second plate portion include a positioning portion that positions the magnet in the optical axis direction.

7. one side of the optical axis direction coincides with an object side of the optical module; the fixed body includes a base that covers the movable body from the other side in the optical axis direction, An optical unit with shake correction function described in any one of claims 1 to 6, characterized in that at least one of the first metal member and the second metal member has a stopper portion extending toward the other side beyond the other end of the optical module in the optical axis direction.

8. a flexible printed circuit board drawn out from the movable body, and a reinforcing plate fixed to the flexible printed circuit board; one of the third plate portion and the fourth plate portion includes a notch portion cut out in the optical axis direction, a pair of locking plates provided on both sides of the notch portion in the circumferential direction, and a pressing plate extending from an edge of the notch portion in the optical axis direction toward an outer circumferential side, the reinforcing plate is held in an upright position in the optical axis direction by having both ends of the reinforcing plate extending on both sides in the circumferential direction of the notch portion locked by the pair of locking plates, 8. The optical unit with shake correction function according to claim 1, wherein the flexible printed circuit board extends in the optical axis direction together with the reinforcing plate and is then bent outward along the pressing plate.

9. The optical unit with shake correction function described in claim 8, characterized in that the position of the pressure plate in the optical axis direction is closer to the swing center of the movable body than the pull-out position at which the flexible printed circuit board is pulled out from the movable body.

Images