JP2022156415A - Optical unit with shake correction function - Google Patents

Abstract

To provide an optical unit with a shake correction function that includes a rotation support mechanism to support a movable body with a leaf spring, in which the breakage of a leaf spring part that rotatably supports the movable body around the optical axis is prevented.SOLUTION: An optical unit 1 which comes with a shake correction function includes a rotation support mechanism 12 to rotatably support a movable body 10 around an optical axis L. The rotation support mechanism 12 connects a first annular plate part 26 and a second annular plate part 46 facing each other in the optical axis direction by a metal member 50 that includes a leaf spring part 53. A radial direction stopper part 64 extending in a +Z direction and facing an edge of the first annular plate part 26 in the radial direction is provided at an edge of the second annular plate part 46. An optical axis direction stopper part 65 extending in a -Z direction from a circumferential edge of a first protrusion plate part 28 that protrudes from the first annular plate part 26 to the outer circumference side faces a second protrusion plate part 48 that protrudes from the first annular plate part 26 to the outer circumference side or a second extension part 47 in a Z-axis direction (optical axis direction).SELECTED DRAWING: Figure 6

Description

The present invention relates to an optical unit with a shake correction function that corrects shake by rotating a camera module around its optical axis.

In optical units mounted on mobile terminals and moving bodies, movable bodies equipped with camera modules are rotated around and along the optical axis in order to suppress disturbance of captured images when mobile terminals and moving bodies move. There is rotation about a first axis that intersects and about a second axis that intersects the optical axis and the first axis. Patent Document 1 describes this type of optical unit with a shake correction function.

The optical unit with a shake correction function disclosed in Patent Document 1 has a fixed body and a movable body rotatably supported by the fixed body around the optical axis. The movable body includes a camera module having a lens, a support surrounding the camera module, and a gimbal mechanism inside the support that supports the camera module rotatably about the first axis and the second axis. Further, the optical unit with a shake correction function includes a rotation support mechanism that supports the movable body so as to be rotatable around the optical axis. The rotation support mechanism includes a projection projecting rearward in the optical axis direction from the bottom of the movable body, and a ball bearing surrounding the projection.

In Japanese Patent Application No. 2020-36404, the present inventors have filed an application for 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. . In the rotation support mechanism of Japanese Patent Application No. 2020-36404, ball bearings with rolling elements inserted between two annular rail members facing each other in the optical axis direction are arranged so as to surround the lens barrel of the camera module. One rail is fixed to the end surface of the movable body on the subject side, and the other rail is rotatably supported around the first axis by a gimbal mechanism.

The rotation support mechanism of Japanese Patent Application No. 2020-36404 can reduce the height of the optical unit with a 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 portion that rotates around the optical axis is small. Therefore, since it is not necessary to secure a large rotation space, the outer shape of the optical unit with a shake correction function can be reduced.

JP 2015-82072 A

However, the rotation support mechanism of Japanese Patent Application No. 2020-36404 is configured using two rail members, a retainer, and a plurality of rolling elements, and furthermore, has a complicated configuration using a plurality of magnets that constitute the pressurizing mechanism. Therefore, the parts cost is high and the assembly work is complicated.

Therefore, instead of arranging the rolling elements and the retainer between the annular members facing each other in the direction of the optical axis and assembling them to form a bearing, if a plate spring elastically deforming around the optical axis is used for connection, pressurization can be achieved. No mechanism is required, and assembly work is easy. However, when a leaf spring is used for connection, the leaf spring may be deformed into an unintended shape when an impact or the like is applied, and the annular member may be displaced in the radial direction. Also, if the pressurizing mechanism is abolished, there is a possibility that the two annular members will be greatly separated from each other or come close to each other in the optical axis direction. Therefore, the leaf spring may be damaged.

In view of the above points, an object of the present invention is to prevent breakage of a leaf spring that supports a movable body so as to be rotatable about an optical axis in an optical unit with a shake correction function that includes a rotation support mechanism using a leaf spring. to do.

In order to solve the above-described problems, an optical unit with a shake correction function of the present invention includes a movable body including a camera module, a fixed body, and the movable body with respect to the fixed body as the optical axis of the camera module. and a rotation support mechanism that rotatably supports the movable body as a first member that surrounds the optical axis and overlaps the camera module when viewed from the optical axis direction. The rotation support mechanism comprises: a second member connected to the fixed body; a movable-body-side fixed portion fixed to a plate portion, a fixed-body-side fixed portion fixed to the second annular plate portion, and a circumferential direction around the optical axis connecting the movable-body-side fixed portion and the fixed-body-side fixed portion; and a metal member including a leaf spring portion that can be elastically deformed to the outside, and a metal member extending in the optical axis direction from one edge of the first annular plate portion and the second annular plate portion and the first annular plate portion and the second annular plate portion. A radial direction stopper portion facing the other edge of the plate portion in a radial direction is provided.

According to the present invention, the rotation support mechanism that connects the movable body and the fixed body includes the second annular plate portion that faces the first annular plate portion provided on the movable body in the optical axis direction, and the first annular plate portion. A plate spring portion is provided which connects with the second annular plate portion and is elastically deformable in the circumferential direction. Therefore, the movable body can be rotatably supported around the optical axis. In addition, since the movable body can be returned to the origin position by the elastic force of the plate spring portion, a magnetic spring for returning to the origin is not required. Therefore, the configuration of the rotation support mechanism can be simplified. Further, a radial direction stopper portion extending in the optical axis direction from one edge of the first annular plate portion and the second annular plate portion and radially facing the other edge of the first annular plate portion and the second annular plate portion is provided. Since it has, it can control that a 1st annular plate part and a 2nd annular plate part move relative to the radial direction largely. Therefore, it is possible to prevent damage to the leaf spring portion that supports the movable body so as to be rotatable about the optical axis.

In the present invention, an optical axis direction stopper portion extending in the optical axis direction from one of the first member and the second member and facing the other of the first member and the second member in the optical axis direction is provided. is preferred. By doing so, it is possible to restrict the approach of the first annular plate portion and the second annular plate portion in the optical axis direction. Therefore, it is possible to prevent damage to the leaf spring portion that supports the movable body so as to be rotatable about the optical axis.

In the present invention, the movable body includes a holder that holds the camera module, the second annular plate portion is arranged in a gap in the optical axis direction between the first annular plate portion and the camera module, and the The holder has a holder protrusion projecting in the optical axis direction, and a gap in the optical axis direction between the tip surface of the holder protrusion and the second member is the light beam between the camera module and the second member. It is preferably narrower than the axial clearance. By doing so, it is possible to prevent the first annular plate portion and the second annular plate portion from being greatly separated in the optical axis direction. Therefore, it is possible to prevent damage to the leaf spring portion that supports the movable body so as to be rotatable about the optical axis.

In the present invention, a rotation restricting mechanism is provided for restricting the rotation range of the movable body about the optical axis, and the rotation restricting mechanism extends from the outer peripheral edge of one of the first annular plate portion and the second annular plate portion to the outer circumference. a first rotation restricting portion extending toward the side; and a second rotation restricting portion extending in the optical axis direction from the outer peripheral edge of the other of the first annular plate portion and the second annular plate portion. It is preferable that one of the portion and the second rotation restricting portion is arranged on both circumferential sides of the other of the first rotation restricting portion and the second rotation restricting portion. In this way, the rotation restricting mechanism facing in the circumferential direction can be formed between the first annular plate portion and the second annular plate portion. Therefore, the rotation range of the movable body can be regulated. In addition, since the arrangement of the first rotation restricting portion and the second rotation restricting portion can be easily changed, it is easy to manage the rotation range. Furthermore, since the rotation restricting mechanism is arranged on the outer peripheral side, the rotation range can be controlled with high accuracy.

In the present invention, the plate spring portion includes a first plate spring portion whose plate thickness direction faces the circumferential direction, and the first plate spring portion includes a first arm portion extending radially 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; It is preferable to provide a connecting portion for With this configuration, since the first plate spring portion is radially long, the spring constant when elastically deformed in the circumferential direction is small. Therefore, the driving force required to rotate the movable body around the optical axis can be reduced, and the magnetic drive mechanism for rolling correction can be miniaturized. Further, since the first plate spring portion is less likely to deform in the optical axis direction, it is possible to support the load of the movable body and suspend the movable body. Therefore, since the configuration of the rotation support mechanism can be simplified, the parts cost can be reduced and the assembly work can be facilitated.

In the present invention, the plate spring portion includes a second plate spring portion whose plate thickness direction faces the radial direction, and the second plate spring portion connects the movable body side fixing portion and the first plate spring portion. Alternatively, it is preferable to connect the fixed body side fixing portion and the first plate spring portion. With this configuration, when an impact such as a drop is applied, the second leaf spring portion elastically deforms, thereby mitigating the radial impact applied to the first leaf spring portion. Therefore, the plastic deformation of the first plate spring portion can be suppressed, so that the impact resistance can be enhanced.

In the present invention, the metal member extends in the radial direction by bending in the optical axis direction from an edge of the annular fixed body side fixing portion and a first notch portion provided in the fixed body side fixing portion. A first metal member having a first leaf spring portion, an annular movable body side fixing portion, and a second cutout portion provided in the movable body side fixing portion bends in the optical axis direction from an edge of the light beam. and a second metal member having the second leaf spring portion extending in the circumferential direction around the axis, and the tip of the second leaf spring portion and the first leaf spring portion are joined. In this way, by dividing the metal member having the leaf spring portion into two parts and joining them together, in each part, part of the plurality of leaf spring parts can be integrated with the stationary body side fixing part or the movable body side fixing part. Therefore, the number of parts can be reduced, and assembly of the rotation support mechanism is easy. Moreover, the positional accuracy of each spring part can be improved.

In the present invention, at least three leaf spring portions are provided dispersedly in the circumferential direction, and the three leaf spring portions are arranged at positions overlapping the camera module when viewed from the optical axis direction. is preferred. With this configuration, the radially extending leaf spring portions can be radially arranged at at least three locations, so that the movable body can be supported in a well-balanced manner. In addition, since the leaf spring portion and the camera module overlap when viewed from the optical axis direction, the outer shape of the optical unit with a shake correction function when viewed from the optical axis direction can be reduced.

In the present invention, the rotation support mechanism is rotatably supported around a first axis that intersects with the optical axis, and the rotation support mechanism is rotatable around a second axis that intersects with the optical axis and the first axis. The second member is rotatably supported about the first axis by the gimbal mechanism, and the fixed body is supported by the movable body via the rotation support mechanism and the gimbal mechanism is preferred. With this configuration, the unit that rotates about the optical axis does not include a gimbal mechanism, so there is no need to secure a large rotation space. Therefore, the outer shape of the optical unit with a shake correction function can be reduced.

In the present invention, the second member includes a pair of second extending portions projecting from the second annular plate portion to both sides in the first axial direction, and a pair of second extending portions extending from the second annular plate portion in the second axial direction. A pair of second protruding plate portions projecting to both sides is provided, the pair of second extending portions are connected to the gimbal mechanism, and the first member extends from the first annular plate portion to both sides in the first axial direction. , and four first projecting plate portions projecting to both sides in the second axial direction, and the optical axis direction stopper portion extends from the circumferential edge of the first projecting plate portion in the optical axis direction. It is preferable to extend and face the second protruding plate portion or the second extended portion in the optical axis direction. With this arrangement, the optical axis direction stopper portions are evenly arranged in the circumferential direction, so that it is possible to restrict the first annular plate portion and the second annular plate portion from coming too close to each other in the optical axis direction. Therefore, it is possible to suppress the deterioration of the positional accuracy of the movable body. In addition, since the shape for connection with the gimbal mechanism (the second extending portion) can be used to configure the stopper mechanism portion, it is possible to avoid complicating the shape of the second member.

In the present invention, the four first plate spring portions distributed in the circumferential direction are provided, and the pair of second extension portions and the pair of second projecting plate portions each have the diameter The optical axis direction stopper portion extends in the optical axis direction from both edges of the first projecting plate portion in the circumferential direction. It is preferable that both sides in the circumferential direction of the first leaf spring portion disposed in the slit are surrounded by the groove. With this configuration, the first plate spring portion and the optical axis direction stopper portion do not interfere with each other. Also, the second member and the first plate spring portion can be arranged at overlapping positions when viewed from the 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 a shake correction function in the optical axis direction can be reduced.

In the present invention, the holder projections are provided at the corners on both sides in the second axial direction, the corners on both sides in the first axial direction, and the corners on both sides in the second axial direction. The holder convex portion is opposed to the second protruding plate portion in the optical axis direction, and the holder convex portions provided at both corner portions in the first axial direction are arranged between the second elongated portion and the It is preferable that they are opposed to each other in the optical axis direction. In this way, the shape (the second extending portion) for connection with the gimbal mechanism can be used to configure the stopper mechanism in the optical axis direction, thus avoiding complication of the component shape of the second member. can. In addition, since the four stopper mechanisms in the optical axis direction are evenly arranged in the circumferential direction, tilting of the movable body can be restricted. Therefore, it is possible to prevent the first annular plate portion and the second annular plate portion from coming too close to each other in the optical axis direction, thereby suppressing deterioration in the positional accuracy of the movable body.

According to the present invention, the rotation support mechanism that connects the movable body and the fixed body includes the second annular plate portion that faces the first annular plate portion provided on the movable body in the optical axis direction, and the first annular plate portion. A plate spring portion is provided which connects with the second annular plate portion and is elastically deformable in the circumferential direction. Therefore, the movable body can be rotatably supported around the optical axis. In addition, since the movable body can be returned to the origin position by the elastic force of the plate spring portion, a magnetic spring for returning to the origin is not required. Therefore, the configuration of the rotation support mechanism can be simplified. Further, a radial direction stopper portion extending in the optical axis direction from one edge of the first annular plate portion and the second annular plate portion and radially facing the other edge of the first annular plate portion and the second annular plate portion is provided. Since it has, it can control that a 1st annular plate part and a 2nd annular plate part move relative to the radial direction largely. Therefore, it is possible to prevent damage to the leaf spring portion that supports the movable body so as to be rotatable about the optical axis.

1 is a perspective view of an optical unit with a shake correction function to which the present invention is applied; FIG. FIG. 2 is an exploded perspective view of the optical unit with a shake correction function in FIG. 1; FIG. 3 is a plan view of the optical unit with a shake correction function with the cover removed, viewed from the object side; FIG. 4 is a cross-sectional view of the optical unit with a shake correction function taken along line AA in FIG. 3; FIG. 4 is a cross-sectional view of the optical unit with a shake correction function taken along line BB in FIG. 3; FIG. 4 is a perspective view of the movable body and the rotation support mechanism as seen from the subject side; FIG. 4 is a plan view of the movable body and the rotation support mechanism as seen from the subject side; 4 is a side view of a movable body and a rotation support mechanism; FIG. 4 is an exploded perspective view of the rotation support mechanism and the first member; FIG.

An embodiment of an optical unit with a shake correction function to which the present invention is applied will be described below with reference to the drawings.

(overall structure)
FIG. 1 is a perspective view of an optical unit with a shake correction function to which the present invention is applied. 2 is an exploded perspective view of the optical unit with a shake correction function in FIG. 1. FIG. FIG. 3 is a plan view of the optical unit with a shake correction function with the cover removed, viewed from the object side.

As shown in FIG. 1 , the optical unit 1 with a shake correction function includes a movable body 10 having a camera module 2 and a fixed body 11 supporting the movable body 10 . The fixed body 11 includes a frame-shaped case 3 that surrounds the movable body 10 from the outer peripheral side, a cover 4 that is fixed to the case 3 from the subject side, and a fixed body 11 that is fixed to the case 3 from the side opposite to the subject and moves the movable body from the side opposite to the subject. A covering base 5 is provided. The optical unit 1 with a shake correction function also includes a flexible printed circuit board 6 pulled out from the movable body 10 and a flexible printed circuit board 7 routed along the outer peripheral surface of the case 3 .

The optical unit 1 with a shake correction function is used, for example, in optical equipment such as camera-equipped mobile phones and drive recorders, and in optical equipment such as action cameras and wearable cameras mounted on mobile objects such as helmets, bicycles, and radio-controlled helicopters. . In such an optical device, if the optical device shakes during shooting, the captured image is disturbed. The optical unit 1 with a shake correction function corrects the inclination of the camera module 2 based on the acceleration, angular velocity, amount of shake, etc. detected by a detection means such as a gyroscope in order to avoid tilting of the photographed image.

The camera module 2 includes a lens 2a and an imaging element 2b arranged on the optical axis L of the lens 2a (see FIGS. 4 and 5). The optical unit 1 with a shake correction function rotates around the optical axis L of the lens 2a, around a first axis R1 orthogonal to the optical axis L, and around a second axis R2 orthogonal to the optical axis L and the first axis R1. 2 is rotated to perform shake correction.

In the following description, the three mutually orthogonal axes are the X-axis direction, the Y-axis direction, and the Z-axis direction. One side of the X-axis direction is assumed to be the -X direction, and the other side thereof is assumed to be the +X direction. One side of the Y-axis direction is the -Y direction, and the other side is the +Y direction. One side of the Z-axis direction is the -Z direction, and the other side is the +Z direction. The Z-axis direction is the optical axis direction. The −Z direction is the side of the camera module 2 opposite to the subject, and the +Z direction is the side of the camera module 2 that is the subject. The first axis R1 and the second axis R2 are inclined 45 degrees with respect to the X axis and the Y axis around the Z axis (around the optical axis).

The optical unit 1 with a shake correction function has a rotation support mechanism 12 that supports a movable body 10 so as to be rotatable around 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 the first axis R1 and supports the rotation support mechanism 12 rotatably about the second axis R2. Movable body 10 is supported by fixed body 11 via rotation support mechanism 12 and gimbal mechanism 13 so as to be rotatable about first axis R<b>1 and second axis R<b>2 .

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 so as 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 rotatably around the second axis R2. The second connection mechanisms 16 are provided on both sides of the gimbal frame 14 in the direction of the second axis R2.

The optical unit 1 with a shake correcting function also includes a shake correcting 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 driving force around the X axis for the movable body 10 and a Y axis drive force for the movable body 10 . A second anti-shake magnetic drive mechanism 22 is provided to generate a rotating driving force. 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 magnetic drive mechanism for shake correction 21 is arranged in the -Y direction of the camera module 2 . The second shake correction magnetic drive mechanism 22 is arranged in the −X direction of the camera module 2 .

The movable body 10 rotates about the X-axis and the Y-axis by synthesizing rotation about the first axis R1 and rotation about the second axis R2. Thereby, the optical unit 1 with a shake correction function performs pitching correction about the X-axis and yawing correction about the Y-axis.

Further, the optical unit 1 with a shake correction function has a rolling correction magnetic driving mechanism 23 that rotates the movable body 10 around the Z-axis. As shown in FIG. 3, the first shake correction magnetic drive mechanism 21, the second shake correction magnetic drive mechanism 22, and the rolling correction magnetic drive mechanism 23 are arranged in the circumferential direction around the Z-axis. In this example, the rolling correction magnetic drive mechanism 23 is arranged in the +Y direction of the camera module 2 . The rolling correction magnetic drive mechanism 23 is located on the opposite side of the first shake correction magnetic drive mechanism 21 with the optical axis L interposed therebetween.

(fixed body)
In the fixed body 11, the cover 4 and the base 5 are plate-shaped and made of non-magnetic metal. As shown in FIG. 2, the cover 4 and the base 5 have hooks 8 bent substantially at right angles toward the case 3 on the outer peripheral edges thereof. The case 3 is made of resin. The hook 8 is engaged with a projection 9 provided on the outer peripheral surface of the case 3 . As shown in FIG. 1, the gimbal mechanism 13 and the camera module 2 are arranged inside the opening 4a of the cover 4 and protrude from the cover 4 in the +Z direction.

The case 3 includes a rectangular frame portion 18 surrounding the movable body 10 and the rotation support mechanism 12 from the outer peripheral side, and a rectangular wire housing portion 19 arranged 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 facing each other in the Y-axis direction, and a third side plate portion 183 and a fourth side plate portion 184 facing each other in the X-axis direction. The first side plate portion 181 is positioned in the -Y direction of the second side plate portion 182 . The third side plate portion 183 is positioned in the +X direction of the fourth side plate portion 184 .

The frame portion 18 includes a notch portion 183a obtained by notching the −Z direction edge of the third side plate portion 183 (see FIG. 3). A flexible printed circuit board 6 connected to the imaging element 2b is pulled out in the +X direction from the end portion of the movable body 10 in the -Z direction. The flexible printed circuit board 6 is pulled out in the +X direction of the frame portion 18 through the notch portion 183 a of the third side plate portion 183 and accommodated in the wiring accommodation portion 19 .

The wire housing portion 19 includes a first wall portion 191 and a second wall portion 192 facing each other in the Y-axis direction, and a third wall portion 193 facing the third side plate portion 183 of the frame portion 18 in the X-axis direction. The wire housing portion 19 includes a notch portion 193a obtained by notching the edge of the third wall portion 193 in the -Z direction. As shown in FIG. 3, the flexible printed circuit board 6 is routed along the inner surfaces of the third side plate portion 183, the first wall portion 191, and the third wall portion 193 inside the wiring accommodating portion 19, and the notch is formed. It is pulled out to the outside of the wiring accommodating portion 19 through the portion 193a.

As shown in FIG. 2, the first side plate portion 181 of the case 3 is provided with a first coil fixing hole 181a. A first coil 21C is fixed to the first coil fixing hole 181a. A fourth side plate portion 184 of the case 3 is provided with a second coil fixing hole 184a. A second coil 22C is fixed to the second coil fixing hole 184a. Further, the second side plate portion 182 is provided with a third coil fixing hole 182a. A third coil 23C is arranged in the third coil fixing hole 182a. The first coil 21C, the second coil 22C, and the third coil 23C are oval air-core coils elongated in the circumferential direction.

As shown in FIG. 3, the first coil 21C fixed to the first side plate portion 181 and the first magnet 21M fixed to the -Y direction side surface of the movable body 10 face each other in the Y direction. A magnetic drive mechanism 21 for shake correction is configured. In addition, 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. A mechanism 22 is constructed. 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. Configure.

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 peripheral surface of the frame portion 18 . In this embodiment, the flexible printed circuit board 7 is routed along the outer peripheral 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 the side surface of the wiring accommodating portion 19 and is fixed to the wiring accommodating portion 19 as a power supply board (not shown). connected to

Magnetic plates 17 (see FIG. 2) are fixed to the flexible printed circuit board 7 at two positions, one overlapping with the center of the first coil 21C and one overlapping with the center of the second coil 22C. The magnetic plate 17 overlapping the first coil 21C and the first magnet 21M constitute a magnetic spring for returning the movable body 10 to the reference angular position in the rotation direction around the X axis. The magnetic plate 17 overlapping the second coil 22C and the second magnet 22M constitute a magnetic spring for returning the movable body 10 to the reference angular position in the rotation direction around the Y-axis. Further, an angular position sensor S is arranged on the flexible printed circuit board 7 at the center of each coil. Based on the output of the angular position sensor S, the optical unit 1 with a shake correction function acquires the angular position of the movable body 10 in the directions of rotation about the X axis, the Y axis, and the Z axis.

(Gimbal mechanism)
4 and 5 are sectional views of the optical unit 1 with a shake correction function. 4 is a cross-sectional view cut along line AA in FIG. 3, and FIG. 5 is a cross-sectional view cut along line BB in FIG. As shown in FIGS. 3 and 5, at diagonal positions of the frame portion 18 in the direction of the second axis R2, there are provided second mounting plates that connect the gimbal frame 14 and the fixed body 11 so as to be rotatable about the second axis R2. A connection mechanism 16 is provided. A second gimbal frame receiving member 162 is fixed to each of a pair of recessed portions 161 provided at diagonal positions in the direction of the second axis R2 of the frame portion 18 . As shown in FIG. 5, the second gimbal frame receiving member 162 includes a sphere 163 and a second thrust receiving member 164 to which the sphere 163 is fixed. By fixing the second gimbal frame receiving member 162 to the recess 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 peripheral side of the second gimbal frame receiving member 162 and brought into point contact with the sphere 163 on the second axis R2. Thereby, the second connection mechanism 16 is configured.

As shown in FIGS. 3 and 4, on both sides of the movable body 10 in the first axis R1 direction, gimbal frames 14 and rotation support mechanisms 12 are connected to each other so as to be rotatable about the first axis R1. 1 connection mechanism 15 is provided. The first connection mechanism 15 includes first gimbal frame receiving members 151 fixed to the rotation support mechanism 12 on both sides of the movable body 10 in the direction of the first axis R1. As shown in FIG. 4, the first gimbal frame receiving member 151 includes 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 ball 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 peripheral side of the first gimbal frame receiving member 151 and brought into point contact with the sphere 152 on the first axis R1. Thus, the first connection mechanism 15 is configured.

The gimbal frame 14 is made of a metal leaf spring. As shown in FIGS. 1, 4, and 5, the gimbal frame 14 includes a gimbal frame main body portion 140 positioned in the +Z direction of the movable body 10, and a gimbal frame main body portion 140 extending from the gimbal frame main body portion 140 toward both sides in the first axis R1 direction. A pair of first axis side extensions 141 projecting and extending in the -Z direction, and a pair of second axis side extensions projecting from the gimbal frame main body 140 toward both sides in the second axis R2 direction and extending in the -Z direction. A portion 142 is provided. The gimbal frame 14 has an opening 143 passing through the center of the gimbal frame main body 140 in the Z-axis direction.

As shown in FIGS. 2 and 4, each of the pair of first-axis-side extensions 141 is recessed inwardly toward the movable body 10 on the first axis R1 in the direction of the first axis R1. A first shaft side concave surface 144 is provided. Further, the first shaft side extension portion 141 includes a projecting portion 146 that projects in the −Z direction of the first shaft side concave curved surface 144 toward the outer peripheral side. Next, on the second axis R2, each of the pair of second axis side extensions 142 has a second axis side concave curved surface that is recessed inward toward the movable body 10 in the direction of the second axis R2. 147. In addition, a pair of notches 148 are provided in the +Z direction of the second axis side concave curved surface 147 by notching both side edges in the circumferential direction.

The first thrust receiving member 153 includes a plate portion 154 extending in the Z-axis direction, a pair of arm portions 155 bent toward the movable body 10 from both circumferential side edges of the plate portion 154, and a pair of arm portions 155. A pair of arm portions 156 are provided that are bent toward the movable body 10 side from both circumferential side edges of the plate portion 154 in the −Z direction (see FIGS. 4 and 6). A ball 152 is fixed to the plate portion 154 by welding. As will be described later, the rotation support mechanism 12 includes a pair of second extensions 47 extending in the -Z direction on both sides of the movable body 10 in the direction of the first axis R1. The tips of the arms 155 and 156 are fixed to the tip of the second extended portion 47 by welding. The distal end portion of the second extended portion 47 is provided with a pair of projecting portions 157 bent outward from both side edges in the circumferential direction.

When assembling the gimbal mechanism 13 , the first axis side extension 141 of the gimbal frame 14 is bent inward and inserted into 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 members 151 can maintain contact. A protruding portion 146 provided at the tip of the first axis side extending portion 141 protrudes radially outward from the -Z direction side of the plate portion 154 (see FIG. 4). This prevents the gimbal frame 14 from coming off the first gimbal frame receiving member 151 in the +Z direction.

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

When assembling the gimbal mechanism 13 , the second axis side extension 142 of the gimbal frame 14 is bent inward and inserted into the second gimbal frame receiving member 162 . As a result, the second axis side extensions 142 are biased toward the outer circumference, so that the second axis side concave surfaces 147 of the second axis side extensions 142 and the spheres 163 of the second gimbal frame receiving members 162 can maintain contact. Also, the second thrust receiving member 16 is inserted into the notch 148 of the second shaft side extension portion 142 .
4 arms 167 are fitted. This prevents the gimbal frame 14 from coming off the second gimbal frame receiving member 162 in the +Z direction.

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

As shown in FIGS. 6 and 9, the first member 25 includes a first annular plate portion 26 that surrounds the optical axis L and overlaps the outer peripheral portion of the camera module 2 from the +Z direction, and an outer peripheral portion from the first annular plate portion 26 . A first extending portion 27 that is bent in the −Z direction and connected to the holder 24 is provided on the outer peripheral side of the projecting camera module 2 . In this embodiment, the rotation support mechanism 12 is arranged in the gap between the first annular plate portion 26 and the camera module 2 in the Z-axis direction (optical axis direction). Further, the first member 25 includes first projecting plate portions 28 provided at four locations around the optical axis L. As shown in FIG. The first protruding plate portion 28 protrudes from the first annular plate portion 26 in four directions: both sides in the direction of the first axis R1 and both sides in the direction of the second axis R2.

The first extending portions 27 are arranged at three locations of the first annular plate portion 26 in the −X direction, +Y direction, and −Y direction. The angular position at which the first extended portion 27 is arranged is the angle at which the first magnet 21M and the second magnet 22M of the anti-shake magnetic drive mechanism 20 and the third magnet 23M of the rolling correction magnetic drive mechanism 23 are arranged. position. The first extension portion 27 includes a first extension portion first portion 271 that extends from the first annular plate portion 26 to the outer peripheral side and is bent in the -Z direction, and the -Z direction of the first extension portion first portion 271. and a rectangular first extension second portion 272 that is wider in the circumferential direction than the first extension portion first portion 271 . The first extension second portion 272 is fixed to the holder 24 .

As shown in FIGS. 4 and 5, the camera module 2 includes a camera module main body portion 30A and a camera module cylindrical portion 30B projecting in the +Z direction from the center of the camera module main body portion 30A. The lens 2a is housed in the camera module cylindrical portion 30B. The holder 24 surrounds the camera module main body 30A from the outer peripheral side. The camera module cylindrical portion 30B protrudes in the +Z direction from a circular hole 26a (see FIGS. 6 and 9) provided in the center of the first annular plate portion 26, and is arranged in the opening 143 of the gimbal frame 14 (see FIG. 1). reference).

As shown in FIG. 7, the camera module main body 30A and the holder 24 have a substantially octagonal profile when viewed from the +Z direction. The holder 24 has a first sidewall 31 and a second sidewall 32 extending parallel to the X direction, and a third sidewall 33 and a fourth sidewall 34 extending parallel to the Y direction. The first sidewall 31 is positioned in the -Y direction of the second sidewall 32 . The third sidewall 33 is positioned in the +X direction of the fourth sidewall 34 . A notch portion 33a is provided on the edge of the third side wall 33 in the −Z direction, through which the flexible printed circuit board 6 pulled out in the +X direction from the end of the camera module 2 in the −Z direction is passed.

Further, the holder 24 includes a fifth side wall 35 and a sixth side wall 36 positioned diagonally in the first axis R1 direction, and a seventh side wall 37 and an eighth side wall 38 positioned diagonally in the second axis R2 direction. . The fifth sidewall 35 is positioned in the −X direction of the sixth sidewall 36 . The seventh side wall 37 is positioned in the -X direction of the eighth side wall 38 . As shown in FIG. 6 , holder projections 39 projecting in the +Z direction are formed on the +Z direction end surfaces of the fifth side wall 35 , the sixth side wall 36 , the seventh side wall 37 , and the eighth side wall 38 .

As shown in FIG. 7, the first side wall 31 of the holder 24 is fixed with the first magnet 21M, and the third side wall 33 is fixed with the second magnet 22M. 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. A 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 optical axis L from the first magnet 21M.

As shown in FIG. 7, the outer peripheral surfaces of the first side wall 31, the second side wall 32, and the fourth side wall 34 of the holder 24 are formed with recesses 40 that are recessed inward. The second magnet 22M and the third magnet 23M are accommodated in the recess 40. As shown in FIG. The first magnet 21M, the second magnet 22M, and the third magnet 23M move in the Z-axis direction by coming into contact with the bottom surface 41 (see FIG. 8) provided at the end in the -Z direction of each recess 40 from the +Z direction. Positioned.

Groove portions 42 are formed on inner surfaces on both sides in the circumferential direction of each of the three recess portions 40 . As shown in FIG. 7, a first extending portion second portion 272 provided at the tip of the first extending portion 27 in the -Z direction is inserted into each recess 40 . Both ends of the first extending portion second portion 272 in the circumferential direction are inserted into the groove portions 42 and fixed to the respective recess portions 40 with an adhesive. The first extended portion second portion 272 is inserted radially inward of the first magnet 21M, the second magnet 22M, and the third magnet 23M. Since the first extension second portion 272 is made of magnetic metal, it functions as a yoke for each magnet.

(rotation support mechanism)
As shown in FIG. 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; A metal member 50 that connects the plate portion 26 and the second annular plate portion 46 is provided. The metal member 50 is fixed to an annular movable-body-side fixing portion 51 fixed to the first annular plate portion 26 , an annular fixed-body-side fixing portion 52 fixed to the second annular plate portion 46 , and a movable-body-side fixing portion 51 . A leaf spring portion 53 that connects with the body side fixing portion 52 is provided. 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.

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

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 first portion 471 extending in the Z-axis direction along the outer peripheral side of the movable body 10 . 2 extension second portion 472 is provided. As shown in FIG. 4, the second portion 472 of the second extending portion faces the movable body 10 with a small gap on the outer side of the movable body 10 in the direction of the first axis R1. As shown in FIGS. 4 and 7 , the first gimbal frame receiving member 151 is fixed to the surface of the second extending portion second portion 472 opposite to the movable body 10 .

(Metal member)
As shown in FIG. 9, the metal member 50 is formed 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. Configured. 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 .

(First metal member)
The first metal member 56 includes an annular fixed body side fixing portion 52 and a first plate spring portion 54 connected to the edge of a first notch portion 58 formed by cutting out the outer peripheral edge of the fixed body side fixing portion 52 . The first cutout portion 58 has a first edge portion 59 extending in the radial direction of the fixed body side fixing portion 52 , and the first leaf spring portion 54 is bent substantially at a right angle from the first edge portion 59 to form a plate. It is bent so that the thickness direction faces the circumferential direction of the fixed body side fixing portion 52 and extends radially outward of the fixed body side fixing portion 52 . When the fixed body side fixing portion 52 is fixed to the second annular plate portion 46, the first leaf spring portion 54 rises in the +Z direction with respect to the second annular plate portion 46, and the plate thickness direction faces the circumferential direction around the optical axis. In addition, it is arranged so as to extend radially outward with the optical axis L as the center. Therefore, the first plate spring portion 54 is elastically deformed in the circumferential direction with the optical axis L as the center.

Four first notches 58 are provided at intervals in the circumferential direction on the outer peripheral edge of the stationary body side fixing portion 52 . A leaf spring portion 54 extends radially outward. Here, second slits 49 extending radially outward from the inner peripheral edge of the second annular plate portion 46 are formed at four locations in the second member 45 which is a mating member to which the fixed body side fixing portion 52 is fixed. The second slit 49 extends radially at the center in the circumferential direction of each of the pair of second extending portions 47 and the pair of second protruding plate portions 48 . Accordingly, the second member 45 is provided with four radially extending second slits 49 at four locations on both sides in the direction of the first axis R1 and on both sides in the direction of the second axis R2. The first metal member 56 is positioned and fixed to the second annular plate portion 46 such that the four first plate spring portions 54 are arranged in the second slits 49 respectively. As a result, the four first plate spring portions 54 are arranged radially on both sides of the optical axis L in the direction of the first axis R1 and on both sides in the direction of the second axis R2.

The first metal member 56 is configured so that the bending directions of the metal plates at the locations where the four first leaf spring portions 54 are connected to the fixed body side fixing portion 52 are not aligned in the same direction. Specifically, in the two first plate spring portions 54 adjacent in the circumferential direction, the bending directions of the metal plates at the portions bent in the +Z direction from the fixed body side fixing portion 52 are opposite. As shown in FIG. 9, in this embodiment, in the two first notch portions 58 adjacent in the circumferential direction, the positions of the first edge portions 59 to which the first plate spring portions 54 are connected are reversed in the circumferential direction. It's becoming Therefore, one of the first leaf spring portions 54 adjacent in the circumferential direction is bent in the +Z direction from the edge (first edge portion 59) on one side in the circumferential direction of the first notch portion 58, and is adjacent in the circumferential direction. The other side of the first leaf spring portion 54 is bent in the +Z direction from the edge (first edge portion 59 ) on the other side in the circumferential direction of the first notch portion 58 .

When the bending directions of the first plate spring portions 54 are aligned in the same direction, if there is an error in the bending angle of the first plate spring portions 54 when manufacturing the first metal member 56, the first plate spring portions 54 Since the circumferential displacement occurs in the same direction, the first member 25 and the second member 45 are displaced in the circumferential direction. As a result, there is a problem that the rotational position (initial position) of the movable body 10 is shifted when the power is not supplied. However, in this embodiment, since the bending directions of the first plate spring portions 54 that are adjacent in the circumferential direction are opposite in the circumferential direction, even if there is an error in the bending angle, the first member 25 and the second member 45 are bent. Positional displacement in the circumferential direction can be avoided, and displacement of the rotational position (initial position) of the movable body 10 during non-energization can be avoided.

The first leaf spring portion 54 includes a first arm portion 541 and a second arm portion 542 extending radially about the optical axis L, and a connecting portion 543 connecting the first arm portion 541 and the second arm portion 542.
Prepare. 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 in the radial direction at positions adjacent to each other in the optical axis direction. Connect in a shape that is folded in the opposite direction in the radial direction. The first arm portion 541 is positioned in the −Z direction of the second arm portion 542 and is connected to the first edge portion 59 of the stationary body side fixing portion 52 . A rectangular first joint portion 544 that is joined to the second plate spring portion 55 by welding or the like is provided at the radially inner end portion of the second arm portion 542 .

As shown in FIGS. 4 and 5, the first leaf spring portion 54 is curved in the -Z direction at the center portion in the radial direction. It is accommodated in the provided second slit 49 . The tip portion of the first plate spring portion 54 extends radially outward while being inclined in the +Z direction, and the tip portion of the second elongated portion 471 or the second extension portion 471 extends radially outward from the tip of the second slit 49 . It is positioned in the +Z direction of the projecting plate portion 48 . The first protruding plate portion 28 arranged in the +Z direction of the first plate spring portion 54 has a radial length shorter than that of the first plate spring portion 54, so the tip portion of the first plate spring portion 54 is located at the first It does not interfere with the projecting plate portion 28 . With such a configuration, the height of the rotation support mechanism 12 in the optical axis direction can be reduced while ensuring the radial length of the first plate spring portion 54, and the outer diameter when viewed in the optical axis direction can be reduced. As a result, the rotary support mechanism 12 can be made compact.

(Second metal member)
The second metal member 57 includes an annular movable body side fixing portion 51 and a second plate spring portion 55 connected to the edge of a second notch portion 60 formed by cutting the inner peripheral edge of the movable body side fixing portion 51 . The second cutout portion 60 has a second edge portion 61 that intersects the radial direction of the movable body side fixing portion 51 , and the second leaf spring portion 55 is bent substantially at a right angle from the second edge portion 61 . , and extends in the circumferential direction of the movable-body-side fixed portion 51 in a plane intersecting the radial direction in a state in which the plate thickness direction faces the radial direction of the movable-body-side fixed portion 51 . When the movable body side fixing portion 51 is fixed to the surface of the first annular plate portion 26 in the +Z direction, the second leaf spring portion 55 extends in the -Z direction with respect to the first annular plate portion 26, and the plate thickness direction is the light beam. It is arranged to extend circumferentially in a plane that intersects the radial direction while being oriented in the radial direction about the axis. Therefore, the second leaf spring portion 55 is elastically deformed in the radial direction with the optical axis L as the center.

Four second notch portions 60 are provided on the inner peripheral edge of the movable body side fixing portion 51 at intervals in the circumferential direction. Moreover, the 3rd notch part 62 which notched the site|part adjacent to the 2nd edge part 61 of each 2nd notch part 60 in the circumferential direction largely to the outer peripheral side is provided in four places. Further, four protruding portions 63 are provided on the outer peripheral edge of the movable body side fixing portion 51 so that the outer peripheral side of each third notch portion 62 protrudes radially outward. At the tip of the second plate spring portion 55, a rectangular second joint portion 551 is provided that is bent radially outward at a substantially right angle. By joining the second joint portion 551 and the first joint portion 544 of the first leaf spring portion 54 by welding, the first leaf spring portion 54 and the second leaf spring portion 55 are connected, and the leaf spring portion 53 are formed. Since the second plate spring portion 55 extends in the circumferential direction toward the third notch portion 62 after being bent at a substantially right angle from the second edge portion 61 , the welding between the second joint portion 551 and the first joint portion 544 is prevented. The portion is arranged in the third notch portion 62 and is configured so as not to interfere with the inner peripheral edge of the movable body side fixing portion 51 .

Here, first slits 29 extending radially outward from the inner peripheral edge of the first annular plate portion 26 are provided at four locations in the first member 25 which is a mating member to which the movable body side fixing portion 51 is fixed. . The first slit 29 is formed radially at the center in the circumferential direction of the first projecting plate portion 28 projecting from the first annular plate portion 26 in four directions: both sides in the direction of the first axis R1 and both sides in the direction of the second axis R2. extends to Accordingly, the first member 25 is provided with four radially extending first slits 29 at four locations on both sides in the direction of the first axis R1 and on both sides in the direction of the second axis R2. The four first slits 29 respectively overlap the second slits 49 provided in the second member 45 when viewed from the optical axis direction. Further, the first member 25 is provided with four notch portions 69 obtained by notching portions adjacent to the first slits 29 in the circumferential direction. The notch portion 69 is provided at a position overlapping the third notch portion 62 of the movable body side fixing portion 51 . The second metal member 57 has four second plate spring portions 55 arranged in the notch portion 69 and a second joint portion 551 provided at the tip of the second plate spring portion 55 that is connected to the first slit 29 . It is positioned so as to be arranged in the center in the circumferential direction and fixed to the first annular plate portion 26 .

In the second metal member 57, similarly to the first metal member 56, the bending directions of the metal plates at the locations where the four second leaf spring portions 55 are connected to the movable body side fixing portion 51 are not aligned in the same direction. It is configured. Specifically, in the two second leaf spring portions 55 adjacent in the circumferential direction, the bending directions of the metal plates of the portions bent in the −Z direction from the movable body side fixing portion 51 are opposite. As shown in FIG. 9, in this embodiment, in the two second notch portions 60 adjacent in the circumferential direction, the positions of the second edge portions 61 to which the second plate spring portions 55 are connected are reversed in the circumferential direction. It's becoming 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 side in the circumferential direction of the second notch portion 60, and is adjacent in the circumferential direction. The other of the mating second leaf spring portions 55 is bent in the −Z direction from the other edge (second edge 61) of the second notch 60 in the circumferential direction.

When the bending directions of the second plate spring portions 55 are aligned in the same direction, if there is an error in the bending angle of the second plate spring portions 55 when manufacturing the second metal member 57, the second plate spring portions 55 Since the circumferential displacement occurs in the same direction, the first member 25 and the second member 45 are displaced in the circumferential direction. As a result, there is a problem that the rotational position (initial position) of the movable body 10 is shifted when the power is not supplied. However, in this embodiment, since the bending directions of the second leaf spring portions 55 adjacent in the circumferential direction are opposite in the circumferential direction, even if there is an error in the bending angle, the first member 25 and the second member 45 are bent. Positional displacement in the circumferential direction can be avoided, and displacement of the rotational position (initial position) of the movable body 10 during non-energization can be avoided.

(Radial stopper mechanism)
The rotation support mechanism 12 includes a radial stopper portion 64 that bends in the +Z direction from the outer peripheral edge of the second annular plate portion 46 and extends to the outer peripheral side of the first annular plate portion 26 . Collision between the radial stopper portion 64 and the outer peripheral edge of the second annular plate portion 46 restricts the radial displacement of the first annular plate portion 26 and the second annular plate portion 46 . In this embodiment, the radial gap T1 between the radial stopper portion 64 and the outer peripheral end face of the first annular plate portion 26 is set to 0.1 mm (see FIG. 7).

As shown in FIGS. 7 and 9 , the radial stopper portion 64 is located between the circumferentially adjacent first extending portion 27 and the second extending portion 47 and between the circumferentially adjacent first extending portions 27 and 47 . One each is arranged between the portion 27 and the second protruding plate portion 48 . In addition, one radial direction stopper portion 64 is provided between a first rotation restricting portion 71 and a second extending portion 47 and between the first rotation restricting portion 71 and a second projecting plate portion 48, which will be described later. placed one by one. Therefore, the radial stopper portions 64 are arranged at eight locations. The eight radial stopper portions 64 are arranged substantially evenly around the optical axis.

(Stopper mechanism in optical axis direction)
The rotation support mechanism 12 includes an optical axis direction stopper portion 65 provided on the first member 25 and a stopper portion 65 provided on the second member 45 as a stopper mechanism for restricting the movement range of the second member 45 in the +Z direction. An extending portion 66 facing the stopper portion 65 in the Z-axis direction (optical axis direction) is provided. As shown in FIGS. 6, 8, and 9, the optical axis direction stopper portion 65 extends in the -Z direction by bending at a substantially right angle from the circumferential edge of the first protruding plate portion . The extending portion 66 is provided at the circumferential end portion of the second extending portion first portion 471 and the circumferential end portion of the second projecting plate portion 48 . The collision between the optical axis direction stopper portion 65 and the extension portion 66 restricts the movement range of the second member 45 in the +Z direction with respect 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 extending portion 66 is set to 0.1 mm (see FIG. 8).

In this embodiment, a pair of optical axis direction stopper portions 65 are provided on both edges of each first projecting plate portion 28 in the circumferential direction. As shown in FIGS. 6 and 8, the first protruding plate portion 28 and the pair of optical axis direction stopper portions 65 have a portal shape when viewed from the radial direction, and are arranged in the second slit 49 . It is arranged so as to surround one leaf spring portion 54 from both sides in the circumferential direction and from the +Z direction. The extending portions 66 are provided at both circumferential ends of the second extending portion first portion 471 and at both circumferential ends of the second projecting plate portion 48 . For this reason, in the second extending portion first portion 471 and the second protruding plate portion 48, the radially inner portion where the extending portion 66 is provided is the radially outer portion where the extending portion 66 is not provided. It has a shape with a wider width in the circumferential direction.

Further, the rotation support mechanism 12 functions as a stopper mechanism for restricting the movement range of the second member 45 in the -Z direction. holder convex portion 39 provided at a location, a tip portion of a second protruding plate portion 48 provided on the second member 45 and extending to a position facing the holder convex portion 39 in the Z-axis direction, and a second extension A first portion 471 is provided.

As shown in FIG. 8, the tip of the holder convex portion 39 in the +Z direction protrudes in the +Z direction from the end surface of the camera module body portion 30A in the +Z direction. Therefore, the gap in the Z-axis direction between the tip surface of the holder convex portion 39 and the second protruding plate portion 48 or the second extending portion first portion 471 is narrower than the gap in the Z-axis direction with the first portion 471 . Therefore, the movement range of the second member 45 in the -Z direction is regulated by the collision between the holder convex portion 39 and the second projecting plate portion 48 or the first portion 471 of the second extending portion. In this embodiment, the gap T3 in the Z-axis direction between the holder convex portion 39 and the second protruding plate portion 48 is set to 0.1 mm (see FIG. 8). Similarly, the gap in the Z-axis direction between the holder convex portion 39 and the second extended portion first portion 471 is also set to 0.1 mm.

(Rotation regulation mechanism)
The rotation support mechanism 12 includes a rotation restriction mechanism 70 that restricts the rotation range of the movable body 10 around the optical axis L. As shown in FIG. 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 to the outer peripheral side (+X direction in this embodiment) and bends in the -Z direction. The tip of the first rotation restricting portion 71 in the −Z direction is fixed to the third side wall 33 of the holder 24 .

The second rotation restricting portion 72 is a protruding portion that bends in the +Z direction (optical axis direction) from the outer peripheral edge of the second annular plate portion 46 and extends to a position facing the first rotation restricting portion 71 in the circumferential direction. One second rotation restricting portion 72 is provided on each side of the first rotation restricting portion 71 in the circumferential direction. In this embodiment, the first rotation restricting portion 71 is formed integrally with a radial direction stopper portion 64 that restricts radial displacement 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, thereby restricting the rotation range of the movable body 10 about the optical axis L with respect to the second member 45 .

(Main functions and effects of this embodiment)
As described above, the optical unit 1 with a shake correction function of this embodiment includes a movable body 10 having a camera module 2 , a fixed body 11 , and an optical axis L of the camera module 2 with the movable body 10 relative to the fixed body 11 . and a rotation support mechanism 12 for rotatably supporting the center. 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 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 facing the first annular plate portion 26 in the Z-axis direction (optical axis direction), and a second member 45 connected to the fixed body 11; A movable body side fixing part 51 fixed to the part 26, a fixed body side fixing part 52 fixed to the second annular plate part 46, and a peripheral part around the optical axis connecting the movable body side fixing part 51 and the fixed body side fixing part 52. and a radial stopper portion 64 extending in the +Z direction from the edge of the second annular plate portion 46 and facing the edge of the first annular plate portion 26 in the radial direction. Prepare.

According to this embodiment, the rotation support mechanism 12 that connects the movable body 10 and the fixed body 11 can elastically deform the two annular plate portions (the first annular plate portion 26 and the second annular plate portion 46) in the circumferential direction. It is configured by connecting with a flat plate spring portion 53 . Therefore, the movable body 10 can be rotatably supported around the optical axis. Further, since the movable body 10 can be returned to the origin position by the elastic force of the plate spring portion 53, a magnetic spring for returning to the origin is not required. Therefore, the configuration of the rotation support mechanism 12 can be simplified. Further, since the radial direction stopper portion 64 extending in the +Z direction from the edge of the second annular plate portion 46 and facing the edge of the first annular plate portion 26 in the radial direction is provided, the first annular plate portion 26 and the second annular plate portion 26 Large relative movement of the annular plate portion 46 in the radial direction can be restricted. Therefore, breakage of the plate spring portion 53 that supports the movable body 10 so as to be rotatable about the optical axis can be prevented. Also, it is possible to suppress the deterioration of the positional accuracy of the movable body 10 .

Note that the radial direction stopper portion can also be provided at the edge of the first annular plate portion 26 . That is, a configuration may be adopted in which a radial stopper portion extending in the −Z direction from the edge of the first annular plate portion 26 and facing the edge of the first annular plate portion 26 in the radial direction is provided. Further, the radial direction stopper portion may be provided not on the outer peripheral edge of the first annular plate portion 26 or the second annular plate portion 46 but on the inner peripheral edge thereof. With such a configuration as well, it is possible to prevent radial displacement between the first annular plate portion 26 and the second annular plate portion 46 . Therefore, damage to the leaf spring portion 53 can be prevented, and deterioration in the positional accuracy of the movable body 10 can be suppressed.

In this embodiment, since the optical axis direction stopper portion 65 extending in the −Z direction from the first member 25 and facing the second member 45 in the Z-axis direction (optical axis direction) is provided, the first annular plate portion 26 and the second The annular plate portion 46 can be restricted from approaching in the Z-axis direction (optical axis direction). Therefore, damage to the leaf spring portion 53 can be prevented, and deterioration in the positional accuracy of the movable body 10 can be suppressed.

The optical axis direction stopper portion may be configured to extend in the +Z direction from the second member 45 and face the first member 25 in the Z axis direction (optical axis direction). Even with such a configuration, it is possible to restrict the approach of the first annular plate portion 26 and the second annular plate portion 46 in the Z-axis direction (optical axis direction). Therefore, damage to the leaf spring portion 53 can be prevented, and deterioration in the positional accuracy of the movable body 10 can be suppressed.

In this embodiment, the movable body 10 has a holder 24 that holds the camera module 2 . The second annular plate portion 46 is arranged in a gap in the Z-axis direction (optical axis direction) between the first annular plate portion 26 and the camera module 2 . The holder 24 has a holder convex portion 39 that protrudes in the Z-axis direction (optical axis direction). 2 and the second member 45 in the Z-axis direction (optical axis direction). Therefore, it is possible to prevent the first annular plate portion 26 and the second annular plate portion 46 from being greatly separated in the Z-axis direction (optical axis direction). Moreover, since the height of the holder convex portion 39 can be easily changed, it is easy to manage the gap in the optical axis direction.

In this embodiment, a rotation restricting mechanism 70 that restricts the rotation range of the movable body 10 around the optical axis L is provided. and a second rotation restricting portion 72 extending in the Z-axis direction (optical axis direction) from the outer peripheral edge of the second annular plate portion 46 . One of the first rotation restricting portion 71 and the second rotation restricting portion 72 is arranged on both circumferential sides of the other of the first rotation restricting portion 71 and the second rotation restricting portion 72 . In this way, the rotation restricting mechanism 70 can be formed between the first annular plate portion 26 and the second annular plate portion 46 so as to face each other in the circumferential direction. Therefore, the rotation range of the movable body 10 can be restricted. In addition, since the arrangement of the first rotation restricting portion 71 and the second rotation restricting portion 72 can be easily changed, it is easy to manage the rotation range. Furthermore, since the rotation restricting mechanism 70 can be arranged on the outer peripheral side, the rotation range can be controlled with high accuracy.

Instead of the 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 is adopted. You may That is, in the rotation restricting mechanism 70, 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. Just do it. Alternatively, a configuration may be adopted in which the first rotation restricting portion 71 extends in the optical axis direction and the second rotation restricting portion 72 extends outward.

In this embodiment, the plate spring portion 53 includes a first plate spring portion 54 whose plate thickness direction faces the circumferential direction. The first leaf spring portion 54 extends radially at a position adjacent to the first arm portion 541 extending radially about the optical axis L and the first arm portion 541 in the Z-axis direction (optical axis direction). It includes a second arm portion 542 and a connection portion 543 that connects the first arm portion 541 and the second arm portion 542 in a radially folded shape. In this manner, the leaf spring shape, in which the plate thickness direction faces the circumferential direction and is long in the radial direction, is likely to be elastically deformed in the circumferential direction. Therefore, the driving force required to rotate the movable body 10 around the optical axis can be reduced, and the magnetic driving mechanism 23 for rolling correction can be miniaturized. In addition, since the first plate spring portion 54 is less likely to deform in the Z-axis direction (optical axis direction), the load of the movable body 10 can be supported and the movable body 10 can be suspended. Therefore, since the configuration of the rotation support mechanism 12 can be simplified, the parts cost can be reduced and the assembly work can be facilitated.

In this embodiment, the plate spring portion 53 includes a second plate spring portion 55 whose plate thickness direction faces the radial direction. to connect. Therefore, when an impact due to dropping or the like is applied, the radial impact applied to the first leaf spring portion 54 is alleviated by the elastic deformation of the second leaf spring portion 55 . Therefore, the plastic deformation of the first plate spring portion 54 can be suppressed, and the buckling of the first plate spring portion 54 that is long in the radial direction can be suppressed, so that the impact resistance can be enhanced.

Note that the second leaf spring portion 55 is arranged not between the movable body side fixing portion 51 and the first leaf spring portion 54, but between the fixed body side fixing portion 52 and the first leaf spring portion 54, and the second leaf spring A configuration in which the portion 55 connects the fixed body side fixing portion 52 and the first leaf spring portion 54 may be employed. For example, the first metal member 56 may be provided with the second leaf spring portion 55 and the second metal member 57 may be provided with the first leaf spring portion 54 . Also in this configuration, plastic deformation of the first leaf spring portion 54 can be suppressed by elastically deforming the second leaf spring portion 55 in the same manner as in the above embodiment.

In this embodiment, the metal member 50 is bent in the optical axis direction from the annular fixed body side fixing portion 52 and the edge (first edge portion 59) of the first notch portion 58 provided in the fixed body side fixing portion 52. A first metal member 56 having a first leaf spring portion 54 radially extending through the first metal member 56 , an annular movable-body-side fixing portion 51 , and an edge of a second notch portion 60 provided in the movable-body-side fixing portion 51 (second a second metal member 57 having a second leaf spring portion 55 that bends in the optical axis direction from the edge portion 61) and extends in the circumferential direction around the optical axis; The first plate spring portion 54 is joined. In this way, by dividing the metal member 50 having the plate spring portions 53 into two parts and joining them together, in each part, part of the plurality of plate spring portions 53 can be fixed to the fixed body side fixing portion 52 or the movable body side fixing portion 51 . can be integrated with Therefore, the number of parts can be reduced, and assembly of the rotation support mechanism 12 is easy. In addition, the positional accuracy of each plate spring portion 53 can be enhanced.

In this embodiment, four leaf spring portions 53 are provided dispersedly in the circumferential direction, and the four leaf spring portions 53 are arranged at positions overlapping the camera module 2 when viewed from the optical axis direction. Therefore, since the four radially extending first plate spring portions 54 are radially arranged, the movable body 10 can be supported in a well-balanced manner. Also, when viewed from the Z-axis direction (optical axis direction), the first leaf spring portion 54 and the camera module 2
, the outer shape of the optical unit with a shake correction function when viewed from the Z-axis direction (optical axis direction) can be reduced.

Note that the plate spring portions 53 may be dispersedly arranged at at least three locations around the optical axis, and may be arranged at five or more locations. By arranging the leaf spring portions 53 in at least three positions, 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.

In this embodiment, the rotation support mechanism 12 is rotatably supported about a first axis R1 that intersects the optical axis L, and the rotation support mechanism 12 is supported about a second axis R2 that intersects the optical axis L and the first axis R1. The second member 45 is rotatably supported about the first axis R1 by the gimbal mechanism 13, and the fixed body 11 is supported via the rotation support mechanism 12 and the gimbal mechanism 13. The movable body 10 is supported. With this arrangement, the unit that rotates around the optical axis does not include the gimbal mechanism 13, so there is no need to secure a large rotation space. Therefore, the outer shape of the optical unit 1 with a shake correction function can be reduced.

In this embodiment, the second member 45 includes a pair of second extending portions 47 projecting from the second annular plate portion 46 to both sides in the first axis R1 direction, and a pair of second extending portions 47 projecting from the second annular plate portion 46 in the second axis R2 direction. The pair of second projecting plate portions 48 are connected to the gimbal mechanism 13, and the first member 25 extends from the first annular plate portion 26 in the direction of the first axis R1. and four first projecting plate portions 28 projecting to both sides in the direction of the second axis R2. It extends in the (optical axis direction) and faces the second projecting plate portion 48 or the second extended portion 47 in the Z-axis direction (optical axis direction). With this arrangement, the optical axis direction stopper portions 65 are evenly arranged in the circumferential direction, so that the first annular plate portion 26 and the second annular plate portion 46 are prevented from coming too close to each other in the Z-axis direction (optical axis direction). can. Therefore, the deterioration of the positional accuracy of the movable body 10 can be suppressed. In addition, since the shape for connection with the gimbal mechanism 13 (the second extending portion 47) can be used to configure the stopper mechanism portion, it is possible to avoid complicating the component shape of the second member 45. FIG.

In this embodiment, four first plate spring portions 54 are provided dispersedly in the circumferential direction. A slit (second slit 49) that extends and opens to the inner peripheral edge of the second annular plate portion 46 is provided. It extends in the (optical axis direction) and surrounds both sides in the circumferential direction of the first plate spring portion 54 arranged in the slit (second slit 49). By doing so, the first leaf spring portion 54 and the optical axis direction stopper portion 65 do not interfere with each other. In addition, the second member 45 and the first plate spring portion 54 can be arranged at overlapping positions when viewed from the direction intersecting the Z-axis direction (optical 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 a shake correction function in the Z-axis direction (optical axis direction) can be reduced. .

In this embodiment, the holder protrusions 39 are provided at the corners on both sides in the second axis R2 direction, the corners on both sides in the first axis R1 direction, and the corners on both sides in the second axis R2 direction. The holder convex portion 39 faces the second protruding plate portion 48 in the Z-axis direction (optical axis direction). It faces the portion 47 in the Z-axis direction (optical axis direction). In this way, a stopper mechanism in the Z-axis direction (optical axis direction) can be configured using the shape (second extending portion 47) for connection with the gimbal mechanism 13, so that the component shape of the second member 45 can be Avoid complications. In addition, since the four stopper mechanisms are evenly arranged in the circumferential direction, tilting of the movable body 10 can be restricted. Therefore, it is possible to prevent the first annular plate portion 26 and the second annular plate portion 46 from coming too close to each other in the Z-axis direction (optical axis direction), thereby preventing the leaf spring portion 53 from being damaged. Also, it is possible to suppress the deterioration of the positional accuracy of the movable body 10 .

DESCRIPTION OF SYMBOLS 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 portion 19... Wiring housing portion 20... Shake correction magnetic drive mechanism 21... First shake correction magnetic drive mechanism 21C... First coil 21M... First magnet 22... Second shake correction 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 part 28...First projecting plate part 29...Slit 30A...Camera module body part 30B...Camera module cylindrical part 31...First side wall , 32 . ... holder convex portion 40 ... concave portion 41 ... bottom surface 42 ... groove portion 45 ... second member 46 ... second annular plate portion 47 ... second extended portion 48 ... second projecting plate portion 49 ... second 2 slits, 50... Metal member, 51... Movable body side fixing part, 52... Fixed body side fixing part, 53... Leaf spring part, 54... First leaf spring part, 55... Second leaf spring part, 56... First metal member , 57... Second metal member, 58... First notch, 59... First edge, 60... Second notch, 61... Second edge, 62... Third notch, 63... Protruding part , 64... Radial direction stopper part, 65... Optical axis direction stopper part, 66... Extension part, 69... Notch part, 70... Rotation restriction mechanism, 71... First rotation restriction part, 72... Second rotation restriction part, 140... Gimbal frame main body 141... First axis side extension part 142... Second axis side extension part 143... Opening 144... First axis side concave curved surface 146... Protruding part 147... Second axis side Shaft-side concave surface 148 Notch 151 First gimbal frame receiving member 152 Sphere 153 First thrust receiving member 154 Plate 155, 156 Arm 157 Projection 161 Recess 162 Second gimbal frame receiving member 163 Sphere 164 Second thrust receiving member 165 Plate 167 Arm 181 First side plate 181a First coil fixing hole 182 Second side plate , 182a...Third coil fixing hole 183...Third side plate part 183a...Notch part 184...Fourth side plate part 184a...Second coil fixing hole 191...First wall part 192...Second wall part , 193...Third wall portion 193a...Notch portion 271...First extension portion first portion 272...First extension portion second portion 471...Second extension portion first portion 472...Second portion 2 extension part second part 541... first arm part 542... second arm part 543... connection part 544... first joint part 551... second joint part L... optical axis R1... first Axis, R2...Second axis, S...Angular position sensor, T1, T2, T3...Gap

Claims (12)

a movable body including a camera module; a fixed body; and a rotation support mechanism that supports the movable body with respect to the fixed body so as to be rotatable about an optical axis of the camera module;
The movable body includes a first member, the first member includes a first annular plate portion that surrounds the optical axis and overlaps the camera module when viewed from the optical axis direction,
The rotation support mechanism is
a second member including a second annular plate portion facing the first annular plate portion in the optical axis direction and connected to the fixed body;
a movable body side fixed part fixed to the first annular plate part, a fixed body side fixed part fixed to the second annular plate part, and the optical axis connecting the movable body side fixed part and the fixed body side fixed part; a metal member provided with a plate spring portion that is elastically deformable in the circumferential direction;
Radially extending from one edge of the first annular plate portion and the second annular plate portion in the optical axis direction and radially facing the other edge of the first annular plate portion and the second annular plate portion and a stopper portion. An optical unit with a shake correction function. An optical axis direction stopper portion extending in the optical axis direction from one of the first member and the second member and facing the other of the first member and the second member in the optical axis direction is provided. 2. The optical unit with a shake correction function according to claim 1. the movable body includes a holder that holds the camera module,
The second annular plate portion is arranged in a gap in the optical axis direction between the first annular plate portion and the camera module,
The holder has a holder protrusion projecting in the optical axis direction, and the gap in the optical axis direction between the tip end surface of the holder protrusion and the second member is the above-described gap between the camera module and the second member. 3. The optical unit with a shake correction function according to claim 2, wherein the gap is narrower than the gap in the optical axis direction. a rotation restriction mechanism that restricts a rotation range of the movable body around the optical axis;
The rotation restricting mechanism is
a first rotation restricting portion extending outward from an outer peripheral edge of one of the first annular plate portion and the second annular plate portion;
a second rotation restricting portion extending in the optical axis direction from the other outer peripheral edges of the first annular plate portion and the second annular plate portion;
One of the first rotation restricting portion and the second rotation restricting portion is disposed on both circumferential sides of the other of the first rotation restricting portion and the second rotation restricting portion. Optical unit with image stabilization function. The plate spring portion includes a first plate spring portion having a plate thickness direction facing the circumferential direction,
The first leaf spring portion is
a first arm portion extending radially 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;
5. The optical unit with a shake correction function according to claim 4, further comprising a connecting portion that connects the first arm portion and the second arm portion in a folded shape in the radial direction. The plate spring portion includes a second plate spring portion having a plate thickness direction facing the radial direction,
The second plate spring portion connects the movable body side fixed portion and the first plate spring portion, or connects the fixed body side fixed portion and the first plate spring portion. Item 6. The optical unit with a shake correction function according to item 5. The metal member is
A first plate spring portion that is bent in the optical axis direction and extends in the radial direction from an edge of a first notch portion provided in the fixed body side fixing portion, and an annular fixed body side fixing portion. a metal member;
and the second leaf spring portion that bends in the optical axis direction from the edge of the second notch provided in the annular movable body side fixing portion and extends in the circumferential direction around the optical axis. a second metal member comprising
7. The optical unit with shake correction function according to claim 6, wherein the tip of the second leaf spring portion and the first leaf spring portion are joined. At least three leaf spring portions distributed in the circumferential direction,
8. The optical system with shake correction function according to claim 5, wherein the three leaf spring portions are arranged at positions overlapping with the camera module when viewed from the optical axis direction. unit. A gimbal that rotatably supports the rotation support mechanism about a first axis intersecting the optical axis and rotatably supports the rotation support mechanism about a second axis that intersects the optical axis and the first axis. have a mechanism,
the second member is rotatably supported about the first axis by the gimbal mechanism;
9. The optical unit with shake correction function according to claim 8, wherein the fixed body supports the movable body via the rotation support mechanism and the gimbal mechanism. The second member includes a pair of second extension portions projecting from the second annular plate portion to both sides in the first axial direction, and a second member projecting from the second annular plate portion to both sides in the second axial direction. comprising a pair of second projecting plate portions, the pair of second extending portions being connected to the gimbal mechanism;
The first member includes four first protruding plate portions that protrude from the first annular plate portion to both sides in the first axial direction and to both sides in the second axial direction,
The optical axis direction stopper portion extends in the optical axis direction from the circumferential edge of the first projecting plate portion and faces the second projecting plate portion or the second extended portion in the optical axis direction. 10. The optical unit with a shake correction function according to claim 9. comprising four of the first leaf spring portions distributed in the circumferential direction,
Each of the pair of second extending portions and the pair of second protruding plate portions is provided with a slit that extends in the radial direction and opens to the inner peripheral edge of the second annular plate portion,
The optical axis direction stopper portion extends in the optical axis direction from both edges of the first projecting plate portion in the circumferential direction, and surrounds both sides in the circumferential direction of the first leaf spring portion disposed in the slit. 11. The optical unit with a shake correction function according to claim 10, wherein: The holder protrusions are provided at corners on both sides in the second axial direction and corners on both sides in the first axial direction,
The holder protrusions provided at the corners on both sides in the second axial direction are opposed to the second projecting plate in the optical axis direction,
12. The image stabilization function according to claim 10, wherein the holder projections provided at the corners on both sides in the first axis direction face the second extensions in the optical axis direction. optical unit with.

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