Optical unit with shake correction function

Abstract

To reduce the size of an optical unit that comes with a shake correction function and simplify the structure of a rotation support mechanism.SOLUTION: An optical unit 1 that comes with a shake correction function comprises a rotation support mechanism 12 for supporting a movable body 10 so as to be capable of rotating around an optical axis L, and a gimbal mechanism 13. The rotation support mechanism 12 connects the movable body 10 and the gimbal mechanism 13 by a metal member 50 provided with a leaf spring part 53. The leaf spring part 53 includes a first leaf spring part 54 the plate thickness direction of which faces the circumferential direction around the optical axis L and a second leaf spring part 55 the plate thickness direction of which faces the radial direction. The first leaf spring part 54 is of a shape being extended in the radial direction and folded back in the reverse direction, and is capable of rotatably supporting the movable body 10 around the optical axis L since its spring constant is small when elastically deformed in the radial direction. The second leaf spring part 55 is capable of suppressing the plastic deformation of the first leaf spring part 54, since its spring constant is small when elastically deformed in the radiation direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an optical unit with a shake correction function that corrects shake by rotating a camera module around an optical axis. [Background technology]

[0002] Among optical units mounted on portable terminals or mobile objects, there are those that rotate a movable body equipped with a camera module around an optical axis, around a first axis intersecting the optical axis, and around a second axis intersecting the optical axis and the first axis in order to suppress distortion of captured images when the portable terminal or mobile object is moving. Patent Document 1 describes this type of optical unit with a shake correction function.

[0003] The optical unit with shake correction function of Patent Document 1 has a fixed body and a movable body supported rotatably around the optical axis relative to the fixed body. The movable body includes a camera module with a lens, a support surrounding the camera module, and a gimbal mechanism that supports the camera module inside the support rotatably around a first axis and a second axis. The optical unit with shake correction function also includes a rotation support mechanism that supports the movable body rotatably around the optical axis. The rotation support mechanism includes a convex portion that protrudes from the bottom of the movable body to the rear in the optical axis direction, and a ball bearing that surrounds the convex portion.

[0004] In Japanese Patent Application No. 2020-36404, the present inventors have filed an optical unit with a shake correction function in which a gimbal mechanism is provided outside the movable body and a rotation support mechanism is provided between the gimbal mechanism and the movable body. The rotation support mechanism in Japanese Patent Application No. 2020-36404 is configured such that a ball bearing with a rolling element inserted between two annular rail members facing each other in the optical axis direction is arranged to surround the lens barrel of the camera module, one rail is fixed to the end face of the movable body on the subject side, and the other rail is supported by the gimbal mechanism so as to be rotatable around a first axis. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-82072 A Summary of the Invention [Problem to be solved by the invention]

[0006] The rotation support mechanism of Patent Application No. 2020-36404 can reduce the height of the optical unit with shake correction function in the optical axis direction. In addition, since the gimbal frame does not rotate around the optical axis, the outer shape of the part that rotates around the optical axis is small. Therefore, there is no need to secure a large rotation space, and the outer shape of the optical unit with shake correction function can be reduced.

[0007] However, the rotational support mechanism of Patent Application No. 2020-36404 is composed of two rail members, a retainer, and multiple rolling elements, and further has a complex configuration using multiple magnets that make up the pressure mechanism, resulting in high component costs and complex, time-consuming assembly work.

[0008] In view of the above, an object of the present invention is to reduce the size of an optical unit with shake correction function that includes a rotary support mechanism, and to simplify the configuration of the rotary support mechanism. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides an optical unit with shake correction function, comprising: a movable body having a camera module; a fixed body; and a movable body for moving the movable body relative to the fixed body with respect to the camera module. and a rotation support mechanism for supporting the movable body so that the movable body can rotate around the optical axis of the lens, the rotation support mechanism including a movable body side fixed part connected to the movable body, a fixed body side fixed part connected to the fixed body, and a leaf spring part connecting the movable body side fixed part and the fixed body side fixed part, the leaf spring part including a first leaf spring part whose thickness direction faces a circumferential direction around the optical axis, the first leaf spring part including a first arm part extending radially around the optical axis, a second arm part extending radially at a position adjacent to the first arm part in the optical axis direction, and a connection part connecting the first arm part and the second arm part in a shape folded back in the radial direction.

[0010] According to the present invention, the rotation support mechanism connecting the movable body and the fixed body includes a first leaf spring part whose plate thickness direction faces the circumferential direction, and the first leaf spring part includes two arm parts extending in the radial direction centered on the optical axis, and a connection part that connects the two arm parts in a shape folded back in the radial direction. Therefore, the first leaf spring part can support the movable body rotatably around the optical axis by elastically deforming in the circumferential direction. In addition, since the movable body can be returned to the origin position by the elastic force of the first leaf spring part, a magnetic spring for returning to the origin is not required. Furthermore, since the first leaf spring part is difficult to deform in the optical axis direction, it can support the load of the movable body and suspend the movable body. Therefore, the configuration of the rotation support mechanism can be simplified, the cost of parts can be reduced, and the assembly work can be facilitated.

[0011] In the present invention, it is preferable that at least three of the leaf spring parts are provided and distributed in the circumferential direction, and the three leaf spring parts are arranged at positions overlapping the camera module when viewed from the optical axis direction. In this way, the leaf spring parts extending in the radial direction can be radially arranged in at least three places, so that the movable body can be supported in a well-balanced manner. In addition, since the leaf spring parts and the camera module overlap when viewed from the optical axis direction, the external shape of the optical unit with shake correction function when viewed from the optical axis direction can be made small.

[0012] In the present invention, the leaf spring portion includes a second leaf spring portion whose thickness direction faces the radial direction, and the second leaf spring portion preferably connects the movable body side fixed portion and the first leaf spring portion, or connects the fixed body side fixed portion and the first leaf spring portion. In this way, when an impact is applied due to a drop or the like, the second leaf spring portion elastically deforms, thereby mitigating the radial impact applied to the first leaf spring portion. Therefore, plastic deformation of the first leaf spring portion can be suppressed, and impact resistance can be improved.

[0013] In the present invention, it is preferable to have a gimbal mechanism that supports the rotation support mechanism rotatably around a first axis intersecting the optical axis and supports the rotation support mechanism rotatably around a second axis intersecting the optical axis and the first axis, the fixed body side fixed part is connected to the fixed body via the gimbal mechanism, and the fixed body supports the movable body via the rotation support mechanism and the gimbal mechanism. In this way, since the unit that rotates around the optical axis does not include a gimbal mechanism, there is no need to secure a large rotation space. Therefore, the external shape of the optical unit with shake correction function can be made small.

[0014] In the present invention, it is preferable that the movable body includes a first member, the first member includes a first annular plate portion surrounding the optical axis and overlapping with the camera module when viewed from the optical axis direction, the rotation support mechanism includes a second annular plate portion facing the first annular plate portion in the optical axis direction and a second member supported by the gimbal mechanism to be rotatable around the first axis, the movable body side fixed portion is fixed to the first annular plate portion, and the fixed body side fixed portion is fixed to the second annular plate portion. In this way, by configuring two annular plate portions to be connected by radially arranged leaf springs, the rotation support mechanism can be made small and simple in configuration.

[0015] In the present invention, a first metal member includes the fixed body side fixed portion, and the first leaf spring portion bent in the optical axis direction from an edge of the fixed body side fixed portion and extending in the radial direction; The optical system has a body-side fixed portion and a second metal member including the second leaf spring portion that is bent from an edge of the movable body-side fixed portion in the optical axis direction and extends in the circumferential direction around the optical axis, and the plate thickness of the first metal member is preferably smaller than the plate thickness of the second metal member. In this way, by dividing the leaf spring portion into two parts, a configuration in which the plate thicknesses of the first leaf spring portion and the second leaf spring portion are different can be realized. Therefore, the spring constant of the first leaf spring portion can be reduced, so that the movable body can be rotated with a small force. Therefore, the magnetic drive mechanism for rolling correction can be made smaller. In addition, the spring constant of the second leaf spring portion can be increased, so that impact resistance can be improved.

[0016] In the present invention, it is preferable that the rotation support mechanism includes four first leaf springs distributed in the circumferential direction, the fixed body side fixed part is annular, four first notches are provided on the outer circumferential edge of the fixed body side fixed part, the first leaf springs are connected to the edges of each first notch, one of the first leaf springs adjacent in the circumferential direction is bent from the edge of the first notch on one side in the circumferential direction in the optical axis direction and extends in the radial direction, and the other of the first leaf springs adjacent in the circumferential direction is bent from the edge of the first notch on the other side in the circumferential direction in the optical axis direction and extends in the radial direction. In this way, if the four first leaf springs and the fixed body side fixed part are configured as one part, the number of parts can be reduced and the assembly of the rotation support mechanism is easy. In addition, the positional accuracy of the four first leaf springs can be improved. Furthermore, since the bending directions of the first plate spring parts are not aligned, it is possible to prevent the rotational position of the movable body from shifting due to an error in the bending angle of the first plate spring parts, and therefore it is possible to prevent the rotational position (initial position) of the movable body from shifting when no current is applied.

[0017] In the present invention, it is preferable that the rotation support mechanism includes four second leaf springs distributed in the circumferential direction, the movable body side fixed part is annular, the inner peripheral edge of the movable body side fixed part is provided with four second notches, the second leaf springs are connected to the edges of each second notch, one of the second leaf springs adjacent in the circumferential direction is bent from the edge of the second notch on one side in the circumferential direction in the optical axis direction and extends to the one side in the circumferential direction, and the other of the second leaf springs adjacent in the circumferential direction is bent from the edge of the second notch on the other side in the circumferential direction in the optical axis direction and extends to the other side in the circumferential direction. In this way, if the four second leaf springs and the movable body side fixed part are configured as one part, the number of parts can be reduced and the assembly of the rotation support mechanism is easy. In addition, the positional accuracy of the four second leaf springs can be improved. Furthermore, since the second leaf spring portions adjacent to each other in the circumferential direction are bent in opposite directions, it is possible to prevent the rotational position of the movable body from shifting due to an error in the bending angle of the second leaf spring portions, and therefore it is possible to prevent the rotational position (initial position) of the movable body from shifting when no current is applied.

[0018] In the present invention, the second member includes a pair of second extension parts protruding from the second annular plate part to both sides in the first axial direction, and a pair of second protruding plate parts protruding from the second annular plate part to both sides in the second axial direction, the pair of second extension parts being connected to the gimbal mechanism, the pair of second extension parts and the pair of second protruding plate parts each being provided with a second slit extending in the radial direction and opening on the inner peripheral edge of the second annular plate part, and the first leaf spring part is preferably disposed in the second slit. In this way, the second member and the first leaf spring part can be disposed in a position where they overlap when viewed from a direction intersecting the optical axis direction. Therefore, the height of the rotation support mechanism in the optical axis direction can be reduced, and the height of the optical unit with shake correction function in the optical axis direction can be reduced.

[0019] In the present invention, it is preferable that the first member includes four first protruding plate portions protruding from the first annular plate portion to both sides in the first axial direction and both sides in the second axial direction, the first protruding plate portions are provided with first slits that overlap the second slits when viewed from the optical axis direction and open to the inner peripheral edge of the first annular plate portion, and the joint between the tip of the second leaf spring portion and the first leaf spring portion is disposed in the first slit. and the first plate spring portion can be disposed at a position overlapping with the first member when viewed from a direction intersecting the optical axis direction. Therefore, the height of the optical unit with shake correction function in the optical axis direction can be reduced.

[0020] In the present invention, it is preferable that the first member includes an optical axis direction stopper portion that extends from the circumferential edge of the first protruding plate portion in the optical axis direction and faces the second protruding plate portion or the second extension portion in the optical axis direction. In this way, four optical axis direction stopper portions are evenly arranged in the circumferential direction, so that it is possible to prevent the first annular plate portion and the second annular plate portion from approaching each other too closely in the optical axis direction. Therefore, it is possible to suppress a decrease in the positional accuracy of the movable body. In addition, since the stopper mechanism portion can be configured by utilizing a shape (second extension portion) for connection with the gimbal mechanism, it is possible to avoid the component shape of the second member becoming complicated.

[0021] In the present invention, it is preferable to provide a radial stopper portion extending from one edge of the first annular plate portion and the second annular plate portion in the optical axis direction and facing the other edge of the first annular plate portion and the second annular plate portion in the radial direction. In this way, it is possible to restrict the first annular plate portion and the second annular plate portion from being misaligned in the radial direction. Therefore, it is possible to suppress a decrease in the positional accuracy of the movable body.

[0022] In the present invention, a rotation restriction mechanism is provided for restricting the rotation range of the movable body around the optical axis, and the rotation restriction mechanism includes a first rotation restriction portion extending from an outer peripheral edge of one of the first annular plate portion and the second annular plate portion toward the outer peripheral side, and a second rotation restriction portion extending from an outer peripheral edge of the other of the first annular plate portion and the second annular plate portion in the optical axis direction, and it is preferable that one of the first rotation restriction portion and the second rotation restriction portion is disposed on both sides in the circumferential direction of the other of the first rotation restriction portion and the second rotation restriction portion. In this way, a rotation restriction mechanism that faces each other in the circumferential direction can be configured between the first annular plate portion and the second annular plate portion. Therefore, the rotation range of the movable body can be restricted. In addition, since the arrangement of the first rotation restriction portion and the second rotation restriction portion can be easily changed, the rotation range can be easily managed. Furthermore, since the rotation restriction mechanism is disposed on the outer peripheral side, the rotation range can be accurately managed. Effect of the Invention

[0023] According to the present invention, the rotation support mechanism connecting the movable body and the fixed body includes a first leaf spring portion whose plate thickness direction faces the circumferential direction, and the first leaf spring portion includes two arm portions extending in the radial direction centered on the optical axis, and a connection portion that connects the two arm portions in a shape folded back in the radial direction. Therefore, the first leaf spring portion can support the movable body rotatably around the optical axis by elastically deforming in the circumferential direction. In addition, since the movable body can be returned to the origin position by the elastic force of the first leaf spring portion, a magnetic spring for returning to the origin is not required. Furthermore, since the first leaf spring portion is not easily deformed in the optical axis direction, it can support the load of the movable body and suspend the movable body. Therefore, the configuration of the rotation support mechanism can be simplified, parts costs can be reduced, and assembly work can be facilitated. [Brief description of the drawings]

[0024] [Figure 1] 1 is a perspective view of an optical unit with a shake correction function to which the present invention is applied. [Diagram 2] FIG. 2 is an exploded perspective view of the optical unit with shake correction function shown in FIG. [Diagram 3] FIG. 2 is a plan view of the optical unit with shake correction function with the cover removed, as viewed from the subject side. [Figure 4] 4 is a cross-sectional view of the optical unit with shake correction function taken along line AA in FIG. 3. [Diagram 5] 4 is a cross-sectional view of the optical unit with shake correction function taken along the line BB in FIG. 3. [Figure 6] FIG. 2 is a perspective view of the movable body and the rotation support mechanism as viewed from the subject side. [Figure 7] FIG. 4 is a plan view of the movable body and the rotation support mechanism as viewed from the subject side. [Figure 8] FIG. 4 is a side view of the movable body and the rotation support mechanism. [Figure 9] FIG. 4 is an exploded perspective view of a rotation support mechanism and a first member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an optical unit with a shake correction function to which the present invention is applied will be described with reference to the drawings.

[0026] (Overall composition) Fig. 1 is a perspective view of an optical unit with shake correction function to which the present invention is applied. Fig. 2 is an exploded perspective view of the optical unit with shake correction function of Fig. 1. Fig. 3 is a plan view of the optical unit with shake correction function with the cover removed, viewed from the subject side.

[0027] 1, optical unit 1 with shake correction function includes movable body 10 having camera module 2, and fixed body 11 supporting movable body 10. Fixed body 11 includes frame-shaped case 3 surrounding movable body 10 from the outer periphery, cover 4 fixed to case 3 from the subject side, and base 5 fixed to case 3 from the side opposite to the subject and covering the movable body from the side opposite to the subject. Optical unit 1 with shake correction function also includes flexible printed circuit board 6 drawn out from movable body 10, and flexible printed circuit board 7 routed along the outer periphery of case 3.

[0028] The optical unit 1 with shake correction function is used in optical devices such as camera-equipped mobile phones and drive recorders, and 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. In order to prevent the captured image from being tilted, the optical unit 1 with shake correction function corrects the tilt of the camera module 2 based on the acceleration, angular velocity, amount of shake, etc. detected by a detection means such as a gyroscope.

[0029] The camera module 2 includes a lens 2a and an image sensor 2b arranged on the optical axis L of the lens 2a (see FIGS. 4 and 5). The optical unit 1 with shake correction function performs shake correction by rotating the camera module 2 around the optical axis L of the lens 2a, around a first axis R1 perpendicular to the optical axis L, and around a second axis R2 perpendicular to the optical axis L and the first axis R1.

[0030] In the following description, the three mutually orthogonal axes are referred to as the X-axis, Y-axis, and Z-axis directions. Furthermore, one side in the X-axis direction is referred to as the -X direction, and the other side as the +X direction. One side in the Y-axis direction is referred to as the -Y direction, and the other side as the +Y direction. One side in the Z-axis direction is referred to as the -Z direction, and the other side as the +Z direction. The Z-axis direction is the optical axis direction. The -Z direction is the side of the camera module 2 away from the subject, and the +Z direction is the side of the camera module 2 toward the subject. The first axis R1 and the second axis R2 are inclined at 45 degrees around the Z axis (around the optical axis) with respect to the X-axis and Y-axis.

[0031] The optical unit 1 with shake correction function has a rotation support mechanism 12 that supports a movable body 10 rotatably about the Z axis, and a gimbal mechanism 13. The gimbal mechanism 13 is a swing support mechanism that supports the rotation support mechanism 12 rotatably about a first axis R1 and also supports the rotation support mechanism 12 rotatably about a second axis R2. The movable body 10 is supported by the fixed body 11 via the rotation support mechanism 12 and the gimbal mechanism 13 in a state where it can rotate about the first axis R1 and the second axis R2.

[0032] As shown in FIG. 3, the gimbal mechanism 13 includes a gimbal frame 14 and a first connection mechanism 15 that connects the gimbal frame 14 and the rotation support mechanism 12 to be rotatable about a first axis R1. The first connection mechanisms 15 are provided on both sides of the gimbal frame 14 in the direction of the first axis R1. The gimbal mechanism 13 also includes a second connection mechanism 16 that connects the gimbal frame 14 and the fixed body 11 to be rotatable about a second axis R2. They are provided on both sides of the arm 14 in the direction of the second axis R2.

[0033] The optical unit 1 with shake correction function also includes a shake correction magnetic drive mechanism 20 that rotates the movable body 10 around the first axis R1 and the second axis R2. As shown in FIG. 3, the shake correction magnetic drive mechanism 20 includes a first shake correction magnetic drive mechanism 21 that generates a drive force around the X axis for the movable body 10, and a second shake correction magnetic drive mechanism 22 that generates a drive force around the Y axis for the movable body 10. The first shake correction magnetic drive mechanism 21 and the second shake correction magnetic drive mechanism 22 are arranged in the circumferential direction around the Z axis. In this example, the first shake correction magnetic drive mechanism 21 is disposed in the -Y direction of the camera module 2. The second shake correction magnetic drive mechanism 22 is disposed in the -X direction of the camera module 2.

[0034] The movable body 10 rotates about the X-axis and the Y-axis by combining the rotation about the first axis R1 and the rotation about the second axis R2, whereby the optical unit 1 with shake correction function performs pitching correction about the X-axis and yawing correction about the Y-axis.

[0035] Furthermore, the optical unit 1 with shake correction function has a magnetic drive mechanism 23 for rolling correction that rotates the movable body 10 around the Z axis. As shown in Fig. 3, the first magnetic drive mechanism 21 for shake correction, the second magnetic drive mechanism 22 for shake correction, and the magnetic drive mechanism 23 for rolling correction are arranged in the circumferential direction around the Z axis. In this example, the magnetic drive mechanism 23 for rolling correction is disposed in the +Y direction of the camera module 2. The magnetic drive mechanism 23 for rolling correction is located on the opposite side to the first magnetic drive mechanism 21 for shake correction, with the optical axis L being sandwiched therebetween.

[0036] (fixed body) In the fixed body 11, the cover 4 and the base 5 are plate-shaped and made of a non-magnetic metal. As shown in FIG. 2, a hook 8 bent at a substantially right angle toward the case 3 side is formed on the outer periphery of the cover 4 and the base 5. The case 3 is made of resin. The hook 8 is engaged with a protrusion 9 provided on the outer periphery of the case 3. As shown in FIG. 1, the gimbal mechanism 13 and the camera module 2 are disposed inside the opening 4a of the cover 4 and protrude from the cover 4 in the +Z direction.

[0037] The case 3 includes a rectangular frame portion 18 that surrounds the movable body 10 and the rotation support mechanism 12 from the outer periphery, and a rectangular wiring accommodating portion 19 that is disposed in the +X direction of the frame portion 18. The frame portion 18 includes a first side plate portion 181 and a second side plate portion 182 that face each other in the Y axis direction, and a third side plate portion 183 and a fourth side plate portion 184 that face each other in the X axis direction. The first side plate portion 181 is located in the -Y direction of the second side plate portion 182. The third side plate portion 183 is located in the +X direction of the fourth side plate portion 184.

[0038] The frame 18 has a notch 183a formed by cutting out the edge of the third side plate 183 in the -Z direction (see FIG. 3). A flexible printed circuit board 6 connected to the imaging element 2b is drawn out in the +X direction from the end of the movable body 10 in the -Z direction. The flexible printed circuit board 6 is drawn out in the +X direction of the frame 18 through the notch 183a of the third side plate 183 and is housed in the wiring housing 19.

[0039] The wiring accommodating section 19 includes a first wall portion 191 and a second wall portion 192 that face each other in the Y-axis direction, and a third wall portion 193 that faces the third side plate portion 183 of the frame portion 18 in the X-axis direction. The wiring accommodating section 19 includes a notch portion 193a formed by cutting out an edge of the third wall portion 193 in the -Z direction. As shown in Fig. 3, the flexible printed circuit board 6 is routed inside the wiring accommodating section 19 in a direction along the inner surfaces of the third side plate portion 183, the first wall portion 191, and the third wall portion 193, and is drawn out to the outside of the wiring accommodating section 19 through the notch portion 193a.

[0040] As shown in FIG. 2, a first coil fixing hole 181a is provided in a first side plate portion 181 of the case 3. A first coil 21C is fixed in the first coil fixing hole 181a. A second coil fixing hole 184a is provided in the fourth side plate portion 184 of the case 3. A second coil 22C is fixed in the second coil fixing hole 184a. A third coil fixing hole 182a is provided in the second side plate portion 182. A third coil 23C is disposed in the third coil fixing hole 182a. The first coil 21C, the second coil 22C, and the third coil 23C are oval-shaped air-core coils that are long in the circumferential direction.

[0041] 3, the first coil 21C fixed to the first side plate portion 181 and the first magnet 21M fixed to the side surface of the movable body 10 in the -Y direction face each other in the Y direction, constituting a first shake correction magnetic drive mechanism 21. The second coil 22C fixed to the fourth side plate portion 184 and the second magnet 22M fixed to the side surface of the movable body 10 in the -X direction face each other in the X direction, constituting a second shake correction magnetic drive mechanism 22. The third coil 23C fixed to the second side plate portion 182 and the third magnet 23M fixed to the side surface of the movable body 10 in the +Y direction face each other in the Y direction, constituting a rolling correction magnetic drive mechanism 23.

[0042] The first coil 21C, the second coil 22C, and the third coil 23C are electrically connected to the flexible printed circuit board 7. The flexible printed circuit board 7 is fixed to the outer circumferential surface of the frame portion 18. In this embodiment, the flexible printed circuit board 7 is routed along the outer circumferential surfaces of the first side plate portion 181, the fourth side plate portion 184, and the second side plate portion 182 of the frame portion 18 in this order. Although not shown in FIGS. 1 and 2, the flexible printed circuit board 7 extends from the second side plate portion 182 to a side surface of the wiring housing portion 19, and is connected to a power supply board (not shown) fixed to the wiring housing portion 19.

[0043] A magnetic plate 17 (see FIG. 2) is fixed to the flexible printed circuit board 7 at two positions, one overlapping with the center of the first coil 21C and the other overlapping with the center of the second coil 22C. The magnetic plate 17 overlapping the first coil 21C and the first magnet 21M form a magnetic spring for returning the movable body 10 to a reference angle position in the rotation direction around the X-axis. The magnetic plate 17 overlapping the second coil 22C and the second magnet 22M form a magnetic spring for returning the movable body 10 to a reference angle position in the rotation direction around the Y-axis. Furthermore, an angular position sensor S is disposed at the center of each coil on the flexible printed circuit board 7. The optical unit 1 with shake correction function acquires the angular positions of the movable body 10 in the rotation directions around the X-axis, the Y-axis, and the Z-axis based on the output of the angular position sensor S.

[0044] (Gimbal mechanism) 4 and 5 are cross-sectional views of the optical unit 1 with shake correction function. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 5 is a cross-sectional view taken along the line BB in FIG. 3. As shown in FIGS. 3 and 5, a second connection mechanism 16 is provided at a diagonal position in the second axis R2 direction of the frame 18, which connects the gimbal frame 14 and the fixed body 11 rotatably around the second axis R2. A second gimbal frame support member 162 is fixed to a pair of recesses 161 provided at diagonal positions in the second axis R2 direction of the frame 18. As shown in FIG. 5, the second gimbal frame support member 162 includes a sphere 163 and a second thrust support member 164 to which the sphere 163 is fixed. By fixing the second gimbal frame support member 162 to the recesses 161, the sphere 163 is supported by the fixed body 11 at a position on the second axis R2. When assembling the gimbal mechanism 13, the gimbal frame 14 is inserted into the inner periphery of the second gimbal frame receiving member 162 and brought into point contact with the sphere 163 on the second axis R2. In this way, the second connection mechanism 16 is formed.

[0045] As shown in Figures 3 and 4, a first connection mechanism 15 that connects the gimbal frame 14 and the rotation support mechanism 12 to be rotatable around the first axis R1 is provided on both sides of the movable body 10 in the first axis R1 direction. The first gimbal frame receiving member 151 is provided with a sphere 152 and a first thrust receiving member 153 to which the sphere 152 is fixed at both sides. As shown in Fig. 4, the first gimbal frame receiving member 151 is provided with a sphere 152 and a first thrust receiving member 153 to which the sphere 152 is fixed. By fixing the first thrust receiving member 153 to the rotation support mechanism 12, the sphere 152 is supported by the rotation support mechanism 12 at a position on the first axis R1. When assembling the gimbal mechanism 13, the gimbal frame 14 is inserted into the inner periphery of the first gimbal frame receiving member 151 and brought into point contact with the sphere 152 on the first axis R1. In this way, the first connection mechanism 15 is configured.

[0046] The gimbal frame 14 is made of a metal leaf spring. As shown in Fig. 1, Fig. 4 and Fig. 5, the gimbal frame 14 includes a gimbal frame main body 140 located in the +Z direction of the movable body 10, a pair of first-axis side extension parts 141 protruding from the gimbal frame main body 140 toward both sides in the first axis R1 direction and extending in the -Z direction, and a pair of second-axis side extension parts 142 protruding from the gimbal frame main body 140 toward both sides in the second axis R2 direction and extending in the -Z direction. The gimbal frame 14 includes an opening 143 penetrating the center of the gimbal frame main body 140 in the Z-axis direction.

[0047] As shown in FIG. 2 and FIG. 4, each of the pair of first-axis-side extending portions 141 includes a first-axis-side concave curved surface 144 on the first axis R1 that is recessed inward in the first-axis-R1 direction toward the movable body 10. The first-axis-side extending portion 141 also includes a protruding portion 146 that protrudes in the -Z direction of the first-axis-side concave curved surface 144 toward the outer periphery. Next, each of the pair of second-axis-side extending portions 142 includes a second-axis-side concave curved surface 147 on the second axis R2 that is recessed inward in the second-axis-R2 direction toward the movable body 10. The second-axis-side concave curved surface 147 also includes a pair of notches 148 in the +Z direction, which are formed by cutting out both side edges in the circumferential direction.

[0048] The first thrust receiving member 153 includes a plate portion 154 extending in the Z-axis direction, a pair of arms 155 bent from both circumferential side edges of the plate portion 154 toward the movable body 10, and a pair of arms 156 bent from both circumferential side edges of the plate portion 154 toward the movable body 10 in the -Z direction of the pair of arms 155 (see Figs. 4 and 6). A sphere 152 is fixed to the plate portion 154 by welding. As described later, the rotation support mechanism 12 includes a pair of second extension portions 47 extending in the -Z direction on both sides of the first axis R1 direction of the movable body 10, and the first gimbal frame receiving member 151 has tips of the arms 155 and 156 fixed to tips of the second extension portions 47 by welding. The tip end of the second extension portion 47 is provided with a pair of protrusions 157 bent from both circumferential side edges toward the outer periphery, and the protrusions 157 fit between the arm portions 155 and 156 .

[0049] When assembling the gimbal mechanism 13, the first axis side extensions 141 of the gimbal frame 14 are bent inwardly and inserted into the inner periphery of the first gimbal frame receiving member 151. As a result, the first axis side extensions 141 are biased toward the outer periphery, so that the first axis side concave curved surfaces 144 of the first axis side extensions 141 and the spheres 152 of the first gimbal frame receiving member 151 can maintain contact with each other. In addition, the protrusions 146 provided at the tips of the first axis side extensions 141 protrude radially outward from the -Z direction side of the plate portion 154 (see FIG. 4). This prevents the gimbal frame 14 from slipping out of the first gimbal frame receiving member 151 in the +Z direction.

[0050] The second thrust receiving member 164 includes a plate portion 165 extending in the Z-axis direction, and a pair of arms 167 bent from both circumferential side edges of the plate portion 165 toward the movable body 10. A sphere 163 is fixed to the plate portion 165 by welding.

[0051] When assembling the gimbal mechanism 13, the second-axis side extensions 142 of the gimbal frame 14 are bent inwardly and inserted into the inner periphery of the second gimbal frame receiving member 162. As a result, the second-axis side extensions 142 are biased toward the outer periphery, so that the second-axis side concave curved surfaces 147 of the second-axis side extensions 142 and the spheres 163 of the second gimbal frame receiving member 162 are in contact with each other. Further, the arm portion 167 of the second thrust receiving member 164 fits into the notch 148 of the second shaft side extension portion 142. This prevents the gimbal frame 14 from slipping out of the second gimbal frame receiving member 162 in the +Z direction.

[0052] (movable body) FIG. 6 is a perspective view of the movable body 10 and the rotation support mechanism 12 as viewed from the subject side. FIG. 7 is a plan view of the movable body 10 and the rotation support mechanism 12 as viewed from the subject side. FIG. 8 is a side view of the movable body 10 and the rotation support mechanism 12 as viewed from the second axis R2 direction. FIG. 9 is an exploded perspective view of the rotation support mechanism 12 and the first member 25. As shown in FIGS. 4, 5, and 6, the movable body 10 includes the camera module 2, a frame-shaped holder 24 that holds the camera module 2, and a first member 25 fixed to the holder 24. The holder 24 is made of resin, and the first member 25 is made of a magnetic metal.

[0053] As shown in FIG. 6 and FIG. 9, the first member 25 includes a first annular plate portion 26 that surrounds the optical axis L and overlaps the outer periphery of the camera module 2 from the +Z direction, and a first extension portion 27 that protrudes from the first annular plate portion 26 toward the outer periphery and is bent in the -Z direction on the outer periphery of the camera module 2 to be connected to the holder 24. In this embodiment, the rotation support mechanism 12 is disposed in a gap between the first annular plate portion 26 and the camera module 2 in the Z-axis direction (optical axis direction). The first member 25 also includes first protruding plate portions 28 that are provided at four locations around the optical axis L. The first protruding plate portions 28 protrude from the first annular plate portion 26 in four directions, on both sides in the first axis R1 direction and on both sides in the second axis R2 direction.

[0054] The first extension portion 27 is disposed at three positions in the -X direction, +Y direction, and -Z direction of the first annular plate portion 26. The angular position at which the first extension portion 27 is disposed is the angular position at which the first magnet 21M and the second magnet 22M of the shake correction magnetic drive mechanism 20 and the third magnet 23M of the rolling correction magnetic drive mechanism 23 are disposed. The first extension portion 27 includes a first extension portion first part 271 that extends from the first annular plate portion 26 to the outer periphery side and bends in the -Z direction, and a rectangular first extension portion second part 272 that is connected to the tip of the first extension portion first part 271 in the -Z direction and has a wider circumferential width than the first extension portion first part 271. The first extension portion second part 272 is fixed to the holder 24.

[0055] As shown in Figures 4 and 5, the camera module 2 includes a camera module main body 30A and a camera module cylindrical portion 30B that protrudes in the +Z direction from the center of the camera module main body 30A. The camera module cylindrical portion 30B houses a lens 2a. The holder 24 surrounds the camera module main body 30A from the outer periphery. The camera module cylindrical portion 30B protrudes in the +Z direction from a circular hole 26a (see Figures 6 and 9) provided in the center of the first annular plate portion 26, and is disposed in an opening 143 of the gimbal frame 14 (see Figure 1).

[0056] 7, the camera module body 30A and the holder 24 have a substantially octagonal contour when viewed from the +Z direction. The holder 24 includes a first side wall 31 and a second side wall 32 extending parallel to the X direction, and a third side wall 33 and a fourth side wall 34 extending parallel to the Y direction. The first side wall 31 is located in the -Y direction of the second side wall 32. The third side wall 33 is located in the +X direction of the fourth side wall 34. A notch 33a is provided on the edge of the -Z direction of the third side wall 33 to pass therethrough the flexible printed circuit board 6 drawn out from the end of the camera module 2 in the -Z direction in the +X direction.

[0057] Furthermore, the holder 24 includes a fifth side wall 35 and a sixth side wall 36 located diagonally in the first axis R1 direction, and a seventh side wall 37 and an eighth side wall 38 located diagonally in the second axis R2 direction. The fifth side wall 35 is located in the -X direction of the sixth side wall 36. The seventh side wall 37 is located in the -X direction of the eighth side wall 38. As shown in FIG. 6, a holder protrusion 39 protruding in the +Z direction is formed on the end faces in the +Z direction of the fifth side wall 35, the sixth side wall 36, the seventh side wall 37, and the eighth side wall 38.

[0058] As shown in FIG. 7, the first magnet 21M is fixed to the first side wall 31 of the holder 24, and the second magnet 22M is fixed to the third side wall 33. The first magnet 21M and the second magnet 22M are two-pole magnetized in the Z-axis direction. The magnetization polarization lines of the first magnet 21M and the second magnet 22M extend in the circumferential direction. The first magnet 21M and the second magnet 22M are arranged with the same pole facing the Z-axis direction. The third magnet 23M is fixed to the fourth side wall 34 of the holder 24. The third magnet 23M is pole-magnetized in the circumferential direction. The first magnet 21M, the second magnet 22M, and the third magnet 23M are arranged in the circumferential direction around the optical axis L. The third magnet 23M is arranged on the opposite side of the first magnet 21M across the optical axis L.

[0059] 7, a recess 40 recessed toward the inner periphery is formed on the outer periphery of the first side wall 31, the second side wall 32, and the fourth side wall 34 of the holder 24, and the first magnet 21M, the second magnet 22M, and the third magnet 23M are housed in the recess 40. The first magnet 21M, the second magnet 22M, and the third magnet 23M are positioned in the Z-axis direction by abutting from the +Z direction against a bottom surface 41 (see FIG. 8) provided at the end of each recess 40 in the -Z direction.

[0060] The three recesses 40 each have a groove 42 formed on the inner surface on both sides in the circumferential direction. As shown in FIG. 7, the first extension second portion 272 provided at the tip of the first extension portion 27 in the -Z direction is inserted into each recess 40. The first extension second portion 272 has both circumferential ends inserted into the groove 42 and is fixed to each recess 40 by adhesive. The first extension second portion 272 is inserted radially inward of the first magnet 21M, the second magnet 22M, and the third magnet 23M. The first extension second portion 272 is made of a magnetic metal and functions as a yoke for each magnet.

[0061] (Rotational support mechanism) 9, the rotation support mechanism 12 includes a second member 45 provided with a second annular plate portion 46 facing the first annular plate portion 26 of the first member 25 in the Z-axis direction, and a metal member 50 connecting the first annular plate portion 26 and the second annular plate portion 46. The metal member 50 includes an annular movable body side fixed portion 51 fixed to the first annular plate portion 26, an annular fixed body side fixed portion 52 fixed to the second annular plate portion 46, and a leaf spring portion 53 connecting the movable body side fixed portion 51 and the fixed body side fixed portion 52. The leaf spring portion 53 includes a first leaf spring portion 54 that elastically deforms in the circumferential direction around the optical axis, and a second leaf spring portion 55 that elastically deforms in the radial direction around the optical axis.

[0062] The second member 45 includes a second annular plate portion 46 surrounding the optical axis L, a pair of second extension portions 47 protruding from the second annular plate portion 46 on both sides in the first axis R1 direction, and a pair of second protruding plate portions 48 protruding from the second annular plate portion 46 on both sides in the second axis R2 direction. The pair of second extension portions 47 are connected to the first axis side extension portions 141 of the gimbal frame 14 so as to be rotatable about the first axis R1 (see FIG. 4). Therefore, the second member 45 is supported by the gimbal mechanism 13 so as to be rotatable about the first axis R1.

[0063] Each of the pair of second extension portions 47 includes a second extension portion first portion 471 extending from the second annular plate portion 46 in the first axis R1 direction, and a second extension portion second portion 472 extending in the Z-axis direction on the outer circumferential side of the movable body 10. As shown in Fig. 4, the second extension portion second portion 472 faces the movable body 10 with a small gap therebetween, on the outer side of the movable body 10 in the first axis R1 direction. As shown in Figs. 4 and 7, the first gimbal frame receiving member 151 is fixed to the surface of the second extension portion second portion 472 opposite to the movable body 10.

[0064] (Metal parts) As shown in FIG. 9, the metal member 50 is constructed by assembling two parts: a first metal member 56 fixed to the second annular plate portion 46, and a second metal member 57 fixed to the first annular plate portion 26. The first metal member 56 and the second metal member 57 are manufactured by bending an etched metal plate. The first metal member 56 and the second metal member 57 have different plate thicknesses, and the plate thickness of the first metal member 56 is smaller than the plate thickness of the second metal member 57. For example, in this embodiment, the plate thickness of the first metal member 56 is 30 μm, and the plate thickness of the second metal member 57 is 70 μm. Therefore, the spring constant of the first plate spring portion 54 provided on the first metal member 56 is smaller than the spring constant of the second plate spring portion 55 provided on the second metal member 57.

[0065] (First metal member) The first metal member 56 includes a ring-shaped fixed body side fixed part 52 and a first leaf spring part 54 connected to an edge of a first cutout part 58 formed by cutting out the outer circumferential edge of the fixed body side fixed part 52. The first cutout part 58 includes a first edge part 59 extending in the radial direction of the fixed body side fixed part 52, and the first leaf spring part 54 is bent at a substantially right angle from the first edge part 59 so that the plate thickness direction faces the circumferential direction of the fixed body side fixed part 52, and extends toward the radially outer side of the fixed body side fixed part 52. When the fixed body side fixed part 52 is fixed to the second annular plate part 46, the first leaf spring part 54 rises in the +Z direction relative to the second annular plate part 46, the plate thickness direction faces the circumferential direction around the optical axis, and is disposed so as to extend radially outward around the optical axis L. Therefore, the first leaf spring part 54 elastically deforms in the circumferential direction around the optical axis L.

[0066] Four first notches 58 are provided at intervals in the circumferential direction on the outer peripheral edge of the fixed body side fixing part 52, and the first leaf spring parts 54 extend radially outward from the first edge parts 59 of each of the first notches 58. Here, the second member 45, which is the mating member to which the fixed body side fixing part 52 is fixed, has four second slits 49 extending radially outward from the inner peripheral edge of the second annular plate part 46. The second slits 49 extend radially in the circumferential center of each of the pair of second extension parts 47 and the pair of second protruding plate parts 48. Therefore, the second member 45 has four second slits 49 extending radially at four locations on both sides in the first axis R1 direction and both sides in the second axis R2 direction. The first metal member 56 is positioned so that the four first leaf spring parts 54 are disposed in the second slits 49, and is fixed to the second annular plate part 46. As a result, the four first leaf spring portions 54 are arranged radially around the optical axis L on both sides in the direction of the first axis R1 and on both sides in the direction of the second axis R2.

[0067] The first metal member 56 is configured such that the bending directions of the metal plate at the locations where the four first leaf spring parts 54 are connected to the fixed body side fixed part 52 are not aligned in the same direction. Specifically, the bending directions of the metal plate at the locations where the first leaf spring parts 54 are bent in the +Z direction from the fixed body side fixed part 52 at two locations adjacent in the circumferential direction are opposite to each other. As shown in FIG. 9, in this embodiment, at two first cutout parts 58 adjacent in the circumferential direction, the positions of the first edge parts 59 to which the first leaf spring parts 54 are connected are opposite to each other in the circumferential direction. Therefore, one of the first leaf spring parts 54 adjacent in the circumferential direction is bent in the +Z direction from the edge (first edge part 59) on one side in the circumferential direction of the first cutout part 58, and the other of the first leaf spring parts 54 adjacent in the circumferential direction is bent in the +Z direction from the edge (first edge part 59) on the other side in the circumferential direction of the first cutout part 58.

[0068] In the case where the bending directions of the first leaf spring parts 54 are aligned in the same direction, if there is an error in the bending angle of the first leaf spring parts 54 during the manufacture of the first metal member 56, the first leaf spring parts 54 will be displaced in the same direction in the circumferential direction, and the first member 25 and the second member 45 will be displaced in the circumferential direction. As a result, there is a problem that the rotational position (initial position) of the movable body 10 when no current is applied is shifted. However, in this embodiment, since the bending directions of the first leaf spring parts 54 adjacent to each other in the circumferential direction are opposite to each other in the circumferential direction, even if there is an error in the bending angle, it is possible to avoid the circumferential positional shift of the first member 25 and the second member 45, and to avoid the rotational position (initial position) of the movable body 10 when no current is applied being shifted.

[0069] The first plate spring portion 54 includes a first arm portion 541 and a second arm portion 542 extending in a radial direction about the optical axis L. The first arm portion 541 includes a second arm portion 542 and a connecting portion 543 that connects the first arm portion 541 and the second arm portion 542. In this embodiment, the first arm portion 541, the second arm portion 542, and the connecting portion 543 are arranged in the same plane. The first arm portion 541 and the second arm portion 542 extend radially at positions adjacent to each other in the optical axis direction, and the connecting portion 543 connects the radially outer ends of the first arm portion 541 and the second arm portion 542 in a shape folded back in the radial direction. The first arm portion 541 is located in the -Z direction of the second arm portion 542 and is connected to the first edge portion 59 of the fixed body side fixed portion 52. The radially inner end of the second arm portion 542 is provided with a rectangular first joint portion 544 that is joined to the second leaf spring portion 55 by welding or the like.

[0070] As shown in FIG. 4 and FIG. 5, the first plate spring portion 54 has a radial center portion curved in the −Z direction and is accommodated in the second slit 49 provided in the second extension portion first part 471 or the second protruding plate portion 48. The tip portion of the first plate spring portion 54 extends radially outward while inclining in the +Z direction, and is located radially outward from the tip of the second slit 49 in the +Z direction of the second extension portion first part 471 or the second protruding plate portion 48. The first protruding plate portion 28 disposed in the +Z direction of the first plate spring portion 54 has a shorter radial length than the first plate spring portion 54, so that the tip portion of the first plate spring portion 54 does not interfere with the first protruding plate portion 28. With this configuration, the height of the rotation support mechanism 12 in the optical axis direction can be reduced and the outer diameter as viewed from the optical axis direction can be reduced while ensuring the radial length of the first plate spring portion 54, thereby making the rotation support mechanism 12 compact in configuration.

[0071] (Second metal member) The second metal member 57 includes a ring-shaped movable body side fixed part 51 and a second plate spring part 55 connected to an edge of a second cutout part 60 formed by cutting out the inner peripheral edge of the movable body side fixed part 51. The second cutout part 60 includes a second edge part 61 intersecting the radial direction of the movable body side fixed part 51, and the second plate spring part 55 is bent at a substantially right angle from the second edge part 61 and extends in the circumferential direction of the movable body side fixed part 51 in a plane intersecting the radial direction with the plate thickness direction facing the radial direction of the movable body side fixed part 51. When the movable body side fixed part 51 is fixed to the surface of the first annular plate part 26 in the +Z direction, the second plate spring part 55 is arranged to extend in the -Z direction with respect to the first annular plate part 26 and extend in the circumferential direction in a plane intersecting the radial direction with the plate thickness direction facing the radial direction centered on the optical axis. Therefore, the second leaf spring portion 55 elastically deforms in the radial direction with the optical axis L as the center.

[0072] The inner peripheral edge of the movable body side fixed part 51 is provided with four second notches 60 spaced apart from each other in the circumferential direction. Four third notches 62 are provided by cutting out a portion adjacent to the second edge 61 of each second notch 60 in the circumferential direction toward the outer periphery. Four protruding parts 63 are provided on the outer peripheral edge of the movable body side fixed part 51, protruding the outer peripheral side of each third notch 62 toward the radially outward direction. The tip of the second leaf spring part 55 is provided with a rectangular second joint part 551 bent toward the radially outward direction at a substantially right angle. The second joint part 551 and the first joint part 544 of the first leaf spring part 54 are joined by welding to connect the first leaf spring part 54 and the second leaf spring part 55, thereby forming the leaf spring part 53. The second leaf spring portion 55 bends at approximately a right angle from the second edge portion 61 and then extends circumferentially toward the third notch portion 62, so that the welding point between the second joint portion 551 and the first joint portion 544 is positioned in the third notch portion 62 and is configured so as not to interfere with the inner edge of the movable body side fixed portion 51.

[0073] Here, the first member 25, which is the counterpart member to which the movable body side fixed portion 51 is fixed, is provided with four first slits 29 extending radially outward from the inner peripheral edge of the first annular plate portion 26. The first slits 29 extend radially in the circumferential center of the first protruding plate portion 28 that protrudes from the first annular plate portion 26 in four directions, on both sides in the first axis R1 direction and on both sides in the second axis R2 direction. Thus, the first member 25 is provided with four first slits 29 extending radially in four locations on both sides in the first axis R1 direction and on both sides in the second axis R2 direction. The four first slits 29 each overlap with a second slit 49 provided in the second member 45 when viewed from the optical axis direction. Moreover, the first member 25 is provided with four notch portions 69 formed by cutting out portions adjacent to each of the first slits 29 in the circumferential direction. The notch portions 69 are provided at positions overlapping with the third notch portions 62 of the movable body side fixed portion 51. The second metal member 57 is fixed to the first annular plate portion 26 in such a manner that the four second leaf spring portions 55 are disposed in the notch portions 69 and that second joint portions 551 provided at the tips of the second leaf spring portions 55 are disposed in the center of the first slits 29 in the circumferential direction.

[0074] In the second metal member 57, similarly to the first metal member 56, the bending directions of the metal plate at the four second leaf spring portions 55 at the portions where they are connected to the movable body side fixed portion 51 are not aligned in the same direction. Specifically, the bending directions of the metal plate at the portions where the second leaf spring portions 55 are bent in the -Z direction from the movable body side fixed portion 51 at two adjacent second leaf spring portions 55 in the circumferential direction are opposite to each other. As shown in Fig. 9, in this embodiment, in the two second cutout portions 60 adjacent to each other in the circumferential direction, the positions of the second edge portions 61 to which the second leaf spring portions 55 are connected are opposite to each other in the circumferential direction. Therefore, one of the second leaf spring portions 55 adjacent in the circumferential direction is bent in the -Z direction from the edge (second edge portion 61) on one circumferential side of the second cutout portion 60, and the other of the second leaf spring portions 55 adjacent in the circumferential direction is bent in the -Z direction from the edge (second edge portion 61) on the other circumferential side of the second cutout portion 60.

[0075] In the case where the bending directions of the second leaf spring parts 55 are aligned in the same direction, if there is an error in the bending angle of the second leaf spring parts 55 during the manufacture of the second metal member 57, the second leaf spring parts 55 will be displaced in the same direction in the circumferential direction, and the first member 25 and the second member 45 will be displaced in the circumferential direction. As a result, there is a problem that the rotational position (initial position) of the movable body 10 when no current is applied is shifted. However, in this embodiment, since the bending directions of the second leaf spring parts 55 adjacent to each other in the circumferential direction are opposite to each other in the circumferential direction, even if there is an error in the bending angle, it is possible to avoid the circumferential positional shift of the first member 25 and the second member 45, and to avoid the rotational position (initial position) of the movable body 10 when no current is applied being shifted.

[0076] (Radial stopper mechanism) The rotation support mechanism 12 includes a radial stopper portion 64 that bends in the +Z direction from the outer circumferential edge of the second annular plate portion 46 and extends to the outer circumferential side of the first annular plate portion 26. The radial stopper portion 64 collides with the outer circumferential edge of the second annular plate portion 46, thereby restricting radial positional deviation between the first annular plate portion 26 and the second annular plate portion 46. In this embodiment, a radial gap T1 between the radial stopper portion 64 and the outer circumferential end face of the first annular plate portion 26 is set to 0.1 mm (see FIG. 7).

[0077] As shown in Fig. 7 and Fig. 9, the radial stopper portion 64 is disposed at one location each between the first extension portion 27 and the second extension portion 47 that are adjacent in the circumferential direction, and between the first extension portion 27 and the second protruding plate portion 48 that are adjacent in the circumferential direction. In addition, the radial stopper portion 64 is disposed at one location each between the first rotation restricting portion 71 and the second extension portion 47, which will be described later, and between the first rotation restricting portion 71 and the second protruding plate portion 48. Therefore, the radial stopper portion 64 is disposed at eight locations. The eight radial stopper portions 64 are disposed approximately evenly around the optical axis.

[0078] (Stopper mechanism in the optical axis direction) The rotation support mechanism 12 includes an optical axis direction stopper portion 65 provided on the first member 25 and an extension portion 66 provided on the second member 45 and facing the optical axis direction stopper portion 65 in the Z-axis direction (optical axis direction) as a stopper mechanism for restricting the movement range of the second member 45 in the +Z direction. As shown in Figs. 6, 8, and 9, the optical axis direction stopper portion 65 is bent at a substantially right angle from the circumferential edge of the first protruding plate portion 28 and extends in the -Z direction. The extension portion 66 is provided on the circumferential end of the second extension portion first part 471 and the circumferential end of the second protruding plate portion 48. The optical axis direction stopper portion 65 and the extension portion 66 collide with each other to restrict the movement range of the second member 45 in the +Z direction relative to the first member 25. In this embodiment, the gap T2 in the Z-axis direction between the optical axis direction stopper portion 65 and the extension portion 66 is set to 0.1 mm (see Fig. 8).

[0079] In this embodiment, a pair of optical axis direction stopper parts 65 are provided on both circumferential edges of each first protruding plate part 28. As shown in Figs. 6 and 8, the first protruding plate part 28 and the pair of optical axis direction stopper parts 65 have a gate-like shape when viewed from the radial direction, and are arranged to surround the first leaf spring part 54 arranged in the second slit 49 from both circumferential sides and the +Z direction. The extension parts 66 are provided on both circumferential ends of the second extension part first part 471 and both circumferential ends of the second protruding plate part 48. Therefore, the second extension part first part 471 and the second protruding plate part 48 have a shape in which the radial inner part where the extension part 66 is provided has a wider circumferential width than the radial outer part where the extension part 66 is not provided.

[0080] In addition, the rotation support mechanism 12 includes a holder protrusion 39 provided at four locations diagonally in the first axis R1 direction and diagonally in the second axis R2 direction of the holder 24, as a stopper mechanism for regulating the movement range of the second member 45 in the -Z direction, a tip portion of a second protruding plate portion 48 provided on the second member 45 and extending to a position opposite the holder protrusion portion 39 in the Z-axis direction, and a second extension portion first portion 471.

[0081] As shown in FIG. 8, the tip of the holder protrusion 39 in the +Z direction protrudes in the +Z direction from the end surface of the camera module main body 30A in the +Z direction. Therefore, the gap in the Z-axis direction between the tip surface of the holder protrusion 39 and the second protruding plate 48 or the second extension part first part 471 is narrower than the gap in the Z-axis direction between the camera module 2 and the second protruding plate 48 or the second extension part first part 471. Therefore, the collision between the holder protrusion 39 and the second protruding plate 48 or the second extension part first part 471 restricts the movement range of the second member 45 in the -Z direction. In this embodiment, the gap T3 in the Z-axis direction between the holder protrusion 39 and the second protruding plate 48 is set to 0.1 mm (see FIG. 8). Similarly, the gap in the Z-axis direction between the holder protrusion 39 and the second extension part first part 471 is also set to 0.1 mm.

[0082] (Rotation restriction mechanism) The rotation support mechanism 12 includes a rotation restricting mechanism 70 that restricts the rotation range of the movable body 10 around the optical axis L. As shown in Figs. 6 and 7, the rotation restricting mechanism 70 includes a first rotation restricting portion 71 provided on the first member 25 and a second rotation restricting portion 72 provided on the second member 45. The first rotation restricting portion 71 protrudes from the first annular plate portion 26 toward the outer periphery (in this embodiment, the +X direction) and bends in the -Z direction. A tip end of the first rotation restricting portion 71 in the -Z direction is fixed to the third side wall 33 of the holder 24.

[0083] The second rotation restricting portion 72 is a protrusion that bends from the outer circumferential edge of the second annular plate portion 46 in the +Z direction (optical axis direction) and extends to a position facing the first rotation restricting portion 71 in the circumferential direction. The second rotation restricting portion 72 is provided at one location on each side of the first rotation restricting portion 71 in the circumferential direction. In this embodiment, the first rotation restricting portion 71 is integrally formed with a radial stopper portion 64 that restricts radial positional deviation between the first annular plate portion 26 and the second annular plate portion 46. The two second rotation restricting portions 72 surround both sides of the first rotation restricting portion 71 in the circumferential direction. Therefore, the first rotation restricting portion 71 and the second rotation restricting portion 72 collide with each other, thereby restricting the rotation range of the movable body 10 around the optical axis L relative to the second member 45.

[0084] (Main effects of this embodiment) As described above, the optical unit 1 with shake correction function of this embodiment has the movable body 10 equipped with the camera module 2, the fixed body 11, and the rotation support mechanism 12 that supports the movable body 10 relative to the fixed body 11 so that the movable body 10 can rotate about the optical axis L of the camera module 2. The rotation support mechanism 12 has a movable body side fixed part 51 connected to the movable body 10, a fixed body side fixed part 52 connected to the fixed body 11, and a leaf spring part 53 that connects the movable body side fixed part 51 and the fixed body side fixed part 52. The leaf spring part 53 has a first leaf spring part 54 whose plate thickness direction faces the circumferential direction around the optical axis L. The first plate spring portion 54 includes a first arm portion 541 extending radially around the optical axis L, a second arm portion 542 extending radially at a position adjacent to the first arm portion 541 in the Z-axis direction (optical axis direction), and a connection portion 543 connecting the first arm portion 541 and the second arm portion 542 in a radially folded shape.

[0085] According to this embodiment, the rotation support mechanism 12 connecting the movable body 10 and the fixed body 11 includes the first plate spring portion 54 whose plate thickness direction faces the circumferential direction, and the first plate spring portion 54 includes two arm portions (first arm portion 541, second arm portion 542) extending in the radial direction centered on the optical axis L, and a connection portion 543 that connects the two arm portions in a shape folded back in the radial direction. In this way, the plate thickness direction faces the circumferential direction, and the plate spring shape that is long in the radial direction is easily elastically deformed in the circumferential direction, so that the movable body 10 can be supported rotatably around the optical axis L. In addition, since the movable body 10 can be returned to the origin position by the elastic force of the first plate spring portion 54, a magnetic spring for returning to the origin is not required. Furthermore, since the first plate spring portion 54 is not easily deformed in the Z-axis direction (optical axis direction), it can support the load of the movable body 10, and a structure in which the movable body 10 is suspended from the fixed body 11 can be formed. Therefore, the configuration of the rotation support mechanism 12 can be simplified, the parts cost can be reduced, and the assembly work can be facilitated.

[0086] In this embodiment, four leaf spring parts 53 are provided which are distributed in the circumferential direction, and the four leaf spring parts 53 are arranged at positions overlapping with the camera module 2 when viewed from the optical axis direction. Therefore, the four first leaf spring parts 54 extending in the radial direction are arranged radially, so that the movable body 10 can be supported in a well-balanced manner. In addition, since the first leaf spring parts 54 and the camera module 2 overlap when viewed from the Z axis direction (optical axis direction), the external shape of the optical unit with shake correction function when viewed from the Z axis direction (optical axis direction) can be made small.

[0087] In this embodiment, the leaf spring portion 53 includes a second leaf spring portion 55 whose thickness direction faces the radial direction, and the second leaf spring portion 55 connects the movable body side fixed portion 51 and the first leaf spring portion 54. Therefore, when an impact is applied due to a drop or the like, the second leaf spring portion 55 elastically deforms, thereby mitigating the radial impact applied to the first leaf spring portion 54. This makes it possible to suppress plastic deformation of the first leaf spring portion 54 and suppress buckling of the first leaf spring portion 54 which is long in the radial direction, thereby improving impact resistance.

[0088] Alternatively, the second leaf spring portion 55 may be disposed between the fixed body side fixed portion 52 and the first leaf spring portion 54, rather than between the movable body side fixed portion 51 and the first leaf spring portion 54, and the second leaf spring portion 55 may connect the fixed body side fixed portion 52 and the first leaf spring portion 54. For example, the second leaf spring portion 55 may be provided on the first metal member 56, and the first leaf spring portion 54 may be provided on the second metal member 57. With this configuration, similar to the above embodiment, the elastic deformation of the second leaf spring portion 55 can suppress plastic deformation of the first leaf spring portion 54.

[0089] Furthermore, the leaf spring parts 53 need only be disposed in at least three locations around the optical axis, and may be disposed in five or more locations. By disposing the leaf spring parts 53 in at least three locations, the movable body 10 can be supported in a well-balanced manner, and tilting of the movable body 10 with respect to the optical axis L can be restricted.

[0090] In this embodiment, the gimbal mechanism 13 supports the rotation support mechanism 12 rotatably around a first axis R1 intersecting the optical axis L, and supports the rotation support mechanism 12 rotatably around a second axis R2 intersecting the optical axis L and the first axis R1. The fixed body side fixed part 52 is connected to the fixed body 11 via the gimbal mechanism 13, and the fixed body 11 supports the movable body 10 via the rotation support mechanism 12 and the gimbal mechanism 13. When the rotation support mechanism 12 is disposed between the gimbal mechanism 13 and the movable body 10 in this manner, the unit that rotates around the optical axis L does not include the gimbal mechanism 13, so there is no need to ensure a large rotation space inside the fixed body 11. Therefore, the external shape of the optical unit with shake correction function can be made small.

[0091] In this embodiment, the movable body 10 includes a first member 25, and the first member 25 includes a first annular plate portion 26 that surrounds the optical axis L and overlaps with the camera module 2 when viewed from the Z-axis direction (optical axis direction). The rotation support mechanism 12 includes a second annular plate portion 46 that faces the first annular plate portion 26 in the Z-axis direction (optical axis direction) and includes a second member 45 that is supported by the gimbal mechanism 13 to be rotatable around the first axis R1. The movable body side fixed portion 51 is fixed to the first annular plate portion 26, and the fixed body side fixed portion 52 is fixed to the second annular plate portion 46. In this manner, by configuring the two annular plate portions to be connected by radially arranged leaf springs, the rotation support mechanism 12 can be made small and simple in configuration.

[0092] In this embodiment, the first metal member 56 includes the fixed body side fixed portion 52 and the first leaf spring portion 54 that is bent from the edge of the fixed body side fixed portion 52 in the Z-axis direction (optical axis direction) and extends in the radial direction, and the movable body side fixed portion 51 and the second metal member 57 includes the second leaf spring portion 55 that is bent from the edge of the movable body side fixed portion 51 in the Z-axis direction (optical axis direction) and extends in the circumferential direction around the optical axis L, and the plate thickness of the first metal member 56 is smaller than the plate thickness of the second metal member 57. In this way, by dividing the leaf spring portion 53 into two parts, a configuration in which the plate thicknesses of the first leaf spring portion 54 and the second leaf spring portion 55 are different can be realized. Therefore, by reducing the plate thickness of the first leaf spring portion 54, the spring constant can be reduced, and the movable body 10 can be rotated with a small force. Therefore, the rolling correction magnetic drive mechanism 23 can be made smaller in size, and the amount of current flow during rolling correction can also be reduced. Moreover, by increasing the plate thickness of the second plate spring portion 55, the spring constant can be increased, and therefore the impact resistance can be improved.

[0093] In this embodiment, the fixed body side fixed part 52 is annular and has four first leaf spring parts 54 arranged in a circumferentially distributed manner, and has four first notch parts 58 on its outer circumferential edge, with the first leaf spring parts being connected to the edges (first edge parts 59) of the first notch parts 58. In this way, by configuring the four first leaf spring parts 54 and the fixed body side fixed part 52 as a single part, the number of parts can be reduced and the assembly of the rotation support mechanism 12 can be made easier. In addition, the positional accuracy of the four first leaf spring parts 54 can be improved. Furthermore, in this embodiment, one of the first plate spring portions 54 adjacent in the circumferential direction is bent in the Z-axis direction (optical axis direction) from an edge on one side in the circumferential direction of the first notch portion 58 and extends in the radial direction, and the other of the first plate spring portions 54 adjacent in the circumferential direction is bent in the Z-axis direction (optical axis direction) from an edge on the other side in the circumferential direction of the first notch portion 58 and extends in the radial direction. In this manner, by configuring the first plate spring portions 54 so that the bending directions are not aligned, it is possible to prevent the rotational position of the movable body 10 from being shifted due to an error in the bending angle of the first plate spring portions 54. Therefore, it is possible to prevent the rotational position (initial position) of the movable body 10 from being shifted when no current is applied.

[0094] In this embodiment, the movable body side fixed part 51 is annular and has four second leaf spring parts 55 arranged in a circumferentially distributed manner, and has four second notches 60 on its inner peripheral edge, with the second leaf spring parts being connected to the edges (second edges 61) of the second notches 60. In this way, by configuring the four second leaf spring parts 55 and the movable body side fixed part 51 as a single part, the number of parts can be reduced and the assembly of the rotation support mechanism 12 can be made easier. Also, the positional accuracy of the four second leaf spring parts 55 can be improved. Furthermore, in this embodiment, one of the second leaf spring parts 55 adjacent in the circumferential direction is bent in the Z-axis direction (optical axis direction) from an edge on one side in the circumferential direction of the second notch part 60 and extends to one side in the circumferential direction, and the other of the second leaf spring parts 55 adjacent in the circumferential direction is bent in the Z-axis direction (optical axis direction) from an edge on the other side in the circumferential direction of the second notch part 60 and extends to the other side in the circumferential direction. In this way, by configuring the second leaf spring parts 55 so that the bending directions are not aligned, it is possible to prevent the rotational position of the movable body 10 from being shifted due to an error in the bending angle of the second leaf spring parts 55. Therefore, it is possible to prevent the rotational position (initial position) of the movable body 10 from being shifted when no current is applied.

[0095] In this embodiment, the second member 45 protrudes from the second annular plate portion 46 on both sides in the direction of the first axis R1. The second member 45 includes a pair of second extension parts 47 connected to the gimbal mechanism 13, and a pair of second protruding plate parts 48 protruding from the second annular plate part 46 to both sides in the second axis R2 direction. Each of the pair of second extension parts 47 and the pair of second protruding plate parts 48 is provided with a second slit 49 extending radially and opening to the inner peripheral edge of the second annular plate part 46, and the first plate spring part 54 is disposed in the second slit 49. By providing a slit in the second member 45 in this manner, the second member 45 and the first plate spring part 54 can be disposed in a position where they overlap when viewed from a direction intersecting the Z-axis direction. Therefore, the height of the rotation support mechanism 12 in the Z-axis direction (optical axis direction) can be reduced, and the height of the optical unit 1 with shake correction function in the Z-axis direction (optical axis direction) can be reduced.

[0096] In this embodiment, the first member 25 includes four first protruding plate portions 28 protruding from the first annular plate portion 26 on both sides in the first axis R1 direction and on both sides in the second axis R2 direction. The first protruding plate portion 28 is provided with a first slit 29 that overlaps with the second slit 49 when viewed from the optical axis direction and opens to the inner peripheral edge of the first annular plate portion 26, and the joint between the tip of the second leaf spring portion 55 and the first leaf spring portion 54 is disposed in the first slit 29. In this manner, by providing the slit in the first member 25, the joint between the second leaf spring portion 55 and the first leaf spring portion 54 can be disposed at a position that overlaps with the first member 25 when viewed from a direction intersecting the Z axis direction (optical axis direction). Therefore, the height of the optical unit 1 with shake correction function in the Z axis direction (optical axis direction) can be reduced.

[0097] In this embodiment, the first member 25 includes an optical axis direction stopper portion 65 that extends from the circumferential edge of the first protruding plate portion 28 in the Z axis direction (optical axis direction) and faces the second protruding plate portion 48 or the second extension portion 47 in the Z axis direction (optical axis direction). In this way, the first annular plate portion 26 and the second annular plate portion 46 can be restricted from approaching each other too closely in the Z axis direction (optical axis direction). Therefore, a decrease in the positional accuracy of the movable body 10 can be suppressed. In addition, since the stopper portion can be configured by utilizing the shape (second extension portion 47) for connection with the gimbal mechanism 13, the component shape of the second member 45 can be prevented from becoming complicated.

[0098] In this embodiment, the radial stopper portion 64 extends from the edge of the second annular plate portion 46 in the +Z direction and faces the edge of the first annular plate portion 26 in the radial direction, so that it is possible to restrict the first annular plate portion 26 and the second annular plate portion 46 from being misaligned in the radial direction. Therefore, it is possible to suppress a decrease in the positional accuracy of the movable body 10.

[0099] The radial stopper portion may be provided on the edge of the first annular plate portion 26. That is, a configuration may be adopted in which a radial stopper portion is provided that extends from the edge of the first annular plate portion 26 in the -Z direction and faces the edge of the first annular plate portion 26 in the radial direction. Even with such a configuration, it is possible to restrict the first annular plate portion 26 and the second annular plate portion 46 from being misaligned in the radial direction. Therefore, a decrease in the positional accuracy of the movable body 10 can be suppressed.

[0100] In this embodiment, a rotation restriction mechanism 70 is provided that restricts the rotation range of the movable body 10 around the optical axis L. The rotation restriction mechanism 70 includes a first rotation restriction portion 71 extending from the first annular plate portion 26 toward the outer periphery, and a second rotation restriction portion 72 extending from the outer periphery of the second annular plate portion 46 in the Z-axis direction (optical axis direction). One of the first rotation restriction portion 71 and the second rotation restriction portion 72 is disposed on both sides in the circumferential direction of the other of the first rotation restriction portion 71 and the second rotation restriction portion 72. In this manner, the rotation restriction mechanism 70 can be configured between the first annular plate portion 26 and the second annular plate portion 46, facing each other in the circumferential direction. Therefore, the rotation range of the movable body 10 can be restricted.

[0101] Note that, instead of a configuration in which the second rotation restricting portion 72 surrounds both sides of the first rotation restricting portion 71 in the circumferential direction, a configuration in which the first rotation restricting portion 71 surrounds both sides of the second rotation restricting portion 72 in the circumferential direction may be adopted. That is, the rotation restricting mechanism 70 may be configured so that one of the first rotation restricting portion 71 and the second rotation restricting portion 72 surrounds both sides of the other of the first rotation restricting portion 71 and the second rotation restricting portion 72 in the circumferential direction. Also, a configuration in which the first rotation restricting portion 71 extends in the optical axis direction and the second rotation restricting portion 72 extends toward the outer periphery may be adopted. A composition may be adopted. [Explanation of symbols]

[0102] REFERENCE SIGNS LIST 1...optical unit with shake correction function, 2...camera module, 2a...lens, 2b...imaging element, 3...case, 4...cover, 4a...opening, 5...base, 6, 7...flexible printed circuit board, 8...hook, 9...projection, 10...movable body, 11...fixed body, 12...rotation support mechanism, 13...gimbal mechanism, 14...gimbal frame, 15...first connection mechanism, 16...second connection mechanism, 17...magnetic plate, 18...frame, 19...wiring housing, 20...shake correction magnetic drive mechanism, 21...first shake correction magnetic drive mechanism, 21C...first coil, 21M...first magnet, 22...second shake correction magnetic drive mechanism structure, 22C...second coil, 22M...second magnet, 23...magnetic drive mechanism for rolling correction, 23C...third coil, 23M...third magnet, 24...holder, 25...first member, 26...first annular plate portion, 26a...circular hole, 27...first extension portion, 28...first protruding plate portion, 29...slit, 30A...camera module main body portion, 30B...camera module cylindrical portion, 31...first side wall, 32...second side wall, 33...third side wall, 33a...notch portion, 34...fourth side wall, 35...fifth side wall, 36...sixth side wall, 37...seventh side wall, 38...eighth side wall, 39...holder protrusion portion, 40...recess, 41...bottom surface, 42...groove portion, 45...second member, 46...second annular plate portion, 47...second extension portion, 48...second protruding plate portion, 49...second slit, 50...metal member, 51...movable body side fixed portion, 52...fixed body side fixed portion, 53...leaf spring portion, 54...first leaf spring portion, 55...second leaf spring portion, 56...first metal member, 57...second metal member, 58...first notch portion, 59...first edge portion, 60...second notch portion, 61...second edge portion, 62...third notch portion, 63...protruding portion, 64...radial stopper portion, 65...optical axis direction stopper portion, 66...extending portion, 69...notch portion, 70...rotation restricting mechanism, 71...first rotation restricting portion, 72...second rotation restricting portion, 140...gimbal frame main body, 141...first axis side extension, 142...second axis side extension, 143...opening, 144...first axis side concave curved surface, 146...projection, 147...second axis side concave curved surface, 148...notch, 151...first gimbal frame receiving member, 152...sphere, 153...first thrust receiving member, 154...plate portion, 155, 156...arm portion, 157...projection portion, 161...recess, 162...second gimbal frame receiving member, 163...sphere, 164...second thrust receiving member, 165...plate portion, 167...arm portion, 181...first side plate portion, 181a...first coil fixing hole, 182...second side plate portion,182a...third coil fixing hole, 183...third side plate portion, 183a...notch portion, 184...fourth side plate portion, 184a...second coil fixing hole, 191...first wall portion, 192...second wall portion, 193...third wall portion, 193a...notch portion, 271...first extension portion first part, 272...first extension portion second part, 471...second extension portion first part, 472...second extension portion second part, 541...first arm portion, 542...second arm portion, 543...connection portion, 544...first joint portion, 551...second joint portion, L...optical axis, R1...first axis, R2...second axis, S...angle position sensor, T1, T2, T3...gap,

Claims

1. a movable body having a camera module, a fixed body, and a rotation support mechanism that supports the movable body relative to the fixed body so as to be rotatable about an optical axis of the camera module; The rotation support mechanism includes: a movable body side fixed part connected to the movable body, a fixed body side fixed part connected to the fixed body, and a leaf spring part connecting the movable body side fixed part and the fixed body side fixed part, the leaf spring portion includes a first leaf spring portion whose thickness direction is oriented in a circumferential direction around the optical axis, The first leaf spring portion includes: A first arm portion extending in a radial direction about the optical axis; a second arm portion extending in the radial direction at a position adjacent to the first arm portion in the optical axis direction; a connection portion that connects the first arm portion and the second arm portion in a shape folded back in the radial direction.

2. At least three of the leaf spring portions are distributed in the circumferential direction, 2. The optical unit with shake correction function according to claim 1, wherein the three leaf springs are arranged at positions overlapping the camera module when viewed from the optical axis direction.

3. The leaf spring portion includes a second leaf spring portion whose thickness direction faces the radial direction, 3. The optical unit with shake correction function described in claim 1 or 2, characterized in that the second leaf spring portion connects the movable body side fixed portion and the first leaf spring portion, or connects the fixed body side fixed portion and the first leaf spring portion.

4. a gimbal mechanism that supports the rotation support mechanism rotatably about a first axis that intersects with the optical axis, and supports the rotation support mechanism rotatably about a second axis that intersects with the optical axis and the first axis, the fixed body side fixed portion is connected to the fixed body via the gimbal mechanism, 4. The optical unit with shake correction function according to claim 3, wherein the fixed body supports the movable body via the rotation support mechanism and the gimbal mechanism.

5. the movable body includes a first member, the first member including a first annular plate portion surrounding the optical axis and overlapping with the camera module as viewed from the optical axis direction, the rotation support mechanism includes a second member including a second annular plate portion facing the first annular plate portion in the optical axis direction and supported by the gimbal mechanism to be rotatable around the first axis, the movable body side fixed portion is fixed to the first annular plate portion, 5. The optical unit with shake correction function according to claim 4, wherein the fixed body side fixed portion is fixed to the second annular plate portion.

6. a first metal member including the fixed body side fixed portion and the first leaf spring portion bent from an edge of the fixed body side fixed portion in the optical axis direction and extending in the radial direction; a second metal member including the movable body side fixed portion and the second leaf spring portion bent from an edge of the movable body side fixed portion in the optical axis direction and extending in a circumferential direction around the optical axis, 6. The optical unit with shake correction function according to claim 5, wherein the plate thickness of the first metal member is smaller than the plate thickness of the second metal member.

7. The spring includes four first leaf spring portions that are distributed in the circumferential direction, the fixed body side fixed portion is annular, an outer peripheral edge of the fixed body side fixed portion is provided with four first notches, and the first leaf spring portion is connected to an edge of each of the first notches, one of the first leaf spring portions adjacent to each other in the circumferential direction is bent from an edge of the first cutout portion on one side in the circumferential direction in the optical axis direction and extends in the radial direction, The optical unit with shake correction function described in claim 6, characterized in that the other of the first leaf spring portions adjacent in the circumferential direction is bent in the optical axis direction from the edge on the other side of the first cutout portion in the circumferential direction and extends in the radial direction.

8. The spring includes four second leaf spring portions that are distributed in the circumferential direction, the movable body side fixed portion is annular, an inner peripheral edge of the movable body side fixed portion is provided with four second notches, and the second leaf spring portion is connected to an edge of each second notch, one of the second leaf spring portions adjacent to each other in the circumferential direction is bent from an edge of the second cutout portion on one side in the circumferential direction in the optical axis direction and extends to the one side in the circumferential direction, The optical unit with shake correction function described in claim 6 or 7, characterized in that the other of the second leaf spring portions adjacent in the circumferential direction is bent in the optical axis direction from the edge on the other side of the circumferential direction of the second cutout portion and extends to the other side in the circumferential direction.

9. the second member includes a pair of second extending portions protruding from the second annular plate portion to both sides in the first axial direction, and a pair of second protruding plate portions protruding from the second annular plate portion to both sides in the second axial direction, the pair of second extending portions being connected to the gimbal mechanism; Each of the pair of second extension portions and the pair of second protruding plate portions is provided with a second slit extending in the radial direction and opening to an inner peripheral edge of the second annular plate portion, 9. The optical unit with shake correction function according to claim 5, wherein the first leaf spring portion is disposed in the second slit.

10. The first member includes four first protruding plate portions protruding from the first annular plate portion to both sides in the first axial direction and to both sides in the second axial direction, the first protruding plate portion is provided with a first slit that overlaps with the second slit when viewed from the optical axis direction and opens to an inner peripheral edge of the first annular plate portion, 10. The optical unit with shake correction function according to claim 9, wherein a joint between a tip of the second leaf spring portion and the first leaf spring portion is disposed in the first slit.

11. The optical unit with shake correction function described in claim 10, characterized in that the first member has an optical axis direction stopper portion extending from the circumferential edge of the first protruding plate portion in the optical axis direction and facing the second protruding plate portion or the second extension portion in the optical axis direction.

12. 12. An optical unit with shake correction function as described in any one of claims 5 to 11, characterized in that it is provided with a radial stopper portion extending from one edge of the first annular plate portion and the second annular plate portion in the optical axis direction and facing the other edge of the first annular plate portion and the second annular plate portion in the radial direction.

13. a rotation restriction mechanism that restricts a rotation range of the movable body about the optical axis, The rotation restriction mechanism includes: a first rotation restricting portion extending from an outer circumferential edge of one of the first annular plate portion and the second annular plate portion toward an outer circumferential side; a second rotation restricting portion extending in the optical axis direction from an outer circumferential edge of the other of the first annular plate portion and the second annular plate portion, 13. An optical unit with shake correction function as described in any one of claims 5 to 12, characterized in that one of the first rotation regulating portion and the second rotation regulating portion is arranged on both circumferential sides of the other of the first rotation regulating portion and the second rotation regulating portion.

Images