CN115145089B

CN115145089B - Optical unit with jitter correction function

Info

Publication number: CN115145089B
Application number: CN202210346060.3A
Authority: CN
Inventors: 笠原章吾; 南泽伸司; 新井努; 须江猛
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Instruments Corp
Priority date: 2021-03-31
Filing date: 2022-03-31
Publication date: 2023-05-16
Anticipated expiration: 2042-03-31
Also published as: JP2022156415A; CN115145089A

Abstract

An optical unit with shake correction function has a rotation support mechanism for supporting a movable body by a leaf spring, and prevents breakage of a leaf spring portion for supporting the movable body rotatably about an optical axis. The optical unit with shake correction function has a rotation support mechanism (12) that supports the movable body (10) so as to be rotatable about an optical axis. The rotation support mechanism is connected to a first annular plate portion (26) and a second annular plate portion (46) which are opposed to each other in the optical axis direction by a metal member (50) having a plate spring portion (53). A radial stopper (64) extending in the +Z direction and radially opposed to the edge of the first annular plate is provided at the edge of the second annular plate. The optical axis direction stopper portion extending in the-Z direction from the circumferential edge of the first protruding plate portion protruding from the first annular plate portion toward the outer circumferential side is opposed to the second protruding plate portion or the second extension portion protruding from the first annular plate portion toward the outer circumferential side in the Z axis direction (optical axis direction).

Description

Optical unit with jitter correction function

Technical Field

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

Background

In order to suppress disturbance of a photographed image when the mobile terminal or the mobile body is moved, an optical unit mounted on the mobile terminal or the mobile body is configured to rotate a mobile body provided with a camera module around an optical axis, around a first axis intersecting the optical axis, and around a second axis intersecting the optical axis and the first axis. Patent document 1 describes an optical unit with a shake correction function of this kind.

The optical unit with a shake correction function of patent document 1 includes: a fixed body; and a movable body supported so as to be rotatable about the optical axis with respect to the fixed body. The movable body is provided with: a camera module having a lens; a support surrounding the camera module; and a gimbal mechanism that supports the camera module on the inner side of the support body so as to be rotatable about the first axis and the second axis. The optical unit with the shake correction function includes a rotation support mechanism that supports the movable body rotatably about the optical axis. The rotation support mechanism is provided with: a convex portion protruding from a bottom portion of the movable body toward a rear side in the optical axis direction; ball bearings surrounding the protrusions.

The present inventors have filed japanese patent application 2020-36404 for an optical unit with a shake correction function, which is provided with a gimbal mechanism outside a movable body, and a rotation support mechanism between the gimbal mechanism and the movable body. The rotary support mechanism of japanese patent application 2020-36404 adopts the following structure: a ball bearing having rolling elements interposed between two annular rail members facing each other in the optical axis direction is disposed so as to surround a lens barrel portion of a camera module, one rail is fixed to an end surface of a movable body on the object side, and the other rail is rotatably supported about a first axis by a gimbal mechanism.

The rotary support mechanism of japanese patent application 2020-36404 can reduce the height in the optical axis direction of the optical unit with the shake correction function. In addition, since the gimbal frame does not rotate about the optical axis, the outer shape of the portion that rotates about the optical axis is small. Therefore, it is not necessary to secure a large rotation space, and therefore the outer shape of the optical unit with the shake correction function can be reduced.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2015-82072

Disclosure of Invention

However, the rotary support mechanism of japanese patent application 2020-36404 is constituted by using two rail members, a retainer and a plurality of rolling elements, and is a complex structure using a plurality of magnets constituting the pressurizing mechanism, and therefore, the component cost is high and the assembly work is also complex.

Therefore, if the bearing is assembled by arranging the rolling elements and the retainer between the annular members facing each other in the optical axis direction, and the plate springs are connected by elastic deformation around the optical axis, a pressing mechanism is not required, and the assembly work is easy. However, in connection using the leaf spring, 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. Further, when the pressurizing mechanism is omitted, the two annular members may be separated or brought close to each other largely in the optical axis direction. Therefore, the leaf spring may be broken.

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

In order to solve the above problems, an optical unit with a shake correction function according to the present invention includes: a movable body having a camera module; a fixed body; and a rotation support mechanism that supports the movable body so as to be rotatable with respect to the fixed body about an optical axis of the camera module, the movable body having a first member that has a first annular plate portion surrounding the optical axis and overlapping the camera module when viewed from the optical axis direction, the rotation support mechanism including: a second member having a second annular plate portion opposed to the first annular plate portion in the optical axis direction, and connected to the fixed body; a metal member having a movable body side fixing portion fixed to the first annular plate portion, a fixed body side fixing portion fixed to the second annular plate portion, and a leaf spring portion connecting the movable body side fixing portion and the fixed body side fixing portion and elastically deformable in a circumferential direction around the optical axis; and a radial stopper portion extending from an edge portion of one of the first annular plate portion and the second annular plate portion in the optical axis direction and facing an edge portion of the other of the first annular plate portion and the second annular plate portion in a radial direction.

According to the present invention, a rotation support mechanism for connecting a movable body and a fixed body includes: a second annular plate portion facing the first annular plate portion provided to the movable body in the optical axis direction; and a leaf spring portion that connects the first annular plate portion and the second annular plate portion and is elastically deformable in the circumferential direction. Therefore, the movable body can be supported rotatably about the optical axis. Further, since the movable body can be returned to the origin position by the elastic force of the plate spring portion, a magnetic spring for origin return is not required. Therefore, the structure of the rotation support mechanism can be simplified. Further, since the radial stopper portion is provided so as to extend from one edge of the first annular plate portion and the second annular plate portion in the optical axis direction and to be opposed to the other edge of the first annular plate portion and the second annular plate portion in the radial direction, the first annular plate portion and the second annular plate portion can be restrained from relatively moving in the radial direction to a large extent. Therefore, breakage of the plate spring portion that supports the movable body rotatably about the optical axis can be prevented.

In the present invention, it is preferable that the optical axis direction stopper extends from one of the first member and the second member in the optical axis direction and faces the other of the first member and the second member in the optical axis direction. In this way, the first annular plate portion and the second annular plate portion can be restricted from approaching in the optical axis direction. Therefore, breakage of the plate spring portion that supports the movable body rotatably about the optical axis can be prevented.

In the present invention, it is preferable that the movable body includes a holder for holding the camera module, the second annular plate portion is disposed in a gap between the first annular plate portion and the camera module in the optical axis direction, the holder includes a holder convex portion protruding in the optical axis direction, and a gap between a distal end surface of the holder convex portion and the second member in the optical axis direction is narrower than a gap between the camera module and the second member in the optical axis direction. In this way, the first annular plate portion and the second annular plate portion can be restricted from being separated greatly in the optical axis direction. Therefore, breakage of the plate spring portion that supports the movable body rotatably about the optical axis can be prevented.

In the present invention, it is preferable that the movable body includes a rotation limiting mechanism that limits a rotation range of the movable body around the optical axis, and the rotation limiting mechanism includes: a first rotation restriction portion extending from an outer peripheral edge of one of the first annular plate portion and the second annular plate portion to an outer peripheral side; and a second rotation restriction portion extending from an outer peripheral edge of the other of the first annular plate portion and the second annular plate portion in the optical axis direction, one of the first rotation restriction portion and the second rotation restriction portion being disposed on both sides in a circumferential direction of the other of the first rotation restriction portion and the second rotation restriction portion. In this way, the rotation restricting mechanism can be configured to be circumferentially opposed between the first annular plate portion and the second annular plate portion. Therefore, the rotation range of the movable body can be limited. In addition, since the arrangement of the first rotation restriction portion and the second rotation restriction portion can be easily changed, the management of the rotation range is easy. Further, since the rotation restricting mechanism is disposed on the outer peripheral side, the rotation range can be managed with high accuracy.

In the present invention, it is preferable that the plate spring portion includes a first plate spring portion having a plate thickness direction oriented in the circumferential direction, and the first plate spring portion includes: a first arm portion extending in a radial direction with the optical axis as a center; a second arm portion extending in the radial direction at a position adjacent to the first arm portion in the optical axis direction; and a connecting portion that connects the first arm portion and the second arm portion in a shape folded back in the radial direction. Thus, since the first plate spring portion is long in the radial direction, the spring constant upon elastic deformation 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 driving mechanism for roll correction can be miniaturized. Further, since the first plate spring portion is less likely to deform in the optical axis direction, the load of the movable body can be supported, and the movable body can be lifted. Therefore, the structure of the rotation support mechanism can be simplified, and therefore, the component cost can be reduced, and the assembly work can be facilitated.

In the present invention, it is preferable that the plate spring portion includes a second plate spring portion having a plate thickness direction oriented in the radial direction, and 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. In this way, when an impact due to dropping or the like is applied, the second plate spring portion elastically deforms, thereby relaxing the impact applied to the first plate spring portion in the radial direction. Therefore, plastic deformation of the first plate spring portion can be suppressed, and therefore impact resistance can be improved.

In the present invention, it is preferable that the metal member has: a first metal member having an annular fixed body side fixing portion and the first plate spring portion bent in the optical axis direction from an edge of a first cutout portion provided in the fixed body side fixing portion and extending in the radial direction; and a second metal member having an annular movable body side fixed portion and the second plate spring portion bent in the optical axis direction from an edge of a second cutout portion provided in the movable body side fixed portion and extending in a circumferential direction around the optical axis, a tip end of the second plate spring portion being joined to the first plate spring portion. In this way, by dividing the metal member having the plate spring portion into two members and joining them together, a part of the plurality of plate spring portions can be integrated with the fixed body side fixing portion or the movable body side fixing portion in each member. Therefore, the number of parts can be reduced, and the rotary support mechanism can be easily assembled. In addition, the positional accuracy of each spring portion can be improved.

In the present invention, it is preferable that the camera module further includes at least three leaf spring portions arranged so as to be dispersed 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. In this way, the plate spring portions extending in the radial direction can be radially arranged at least three positions, and therefore the movable body can be supported in a balanced manner. In addition, since the plate spring portion overlaps the camera module when viewed from the optical axis direction, the outer shape of the optical unit having the shake correction function when viewed from the optical axis direction can be reduced.

In the present invention, it is preferable that the optical axis adjustment device further includes a gimbal mechanism that rotatably supports the rotation support mechanism around a first axis intersecting the optical axis and rotatably supports the rotation support mechanism around a second axis intersecting the optical axis and the first axis, the second member is rotatably supported around the first axis by the gimbal mechanism, and the fixed body supports the movable body via the rotation support mechanism and the gimbal mechanism. In this way, since the unit that rotates around the optical axis does not include the gimbal mechanism, it is not necessary to secure a large rotation space. Therefore, the outer shape of the optical unit with the shake correction function can be reduced.

In the present invention, the second member preferably includes: a pair of second extending portions protruding from the second annular plate portion to both sides in the first axial direction; and a pair of second protruding plate portions protruding from the second annular plate portion to both sides in the second axial direction, the pair of second extending portions being connected to the gimbal mechanism, the first member including a first protruding plate portion protruding from the first annular plate portion to both sides in the first axial direction and both sides in the second axial direction, the optical axis direction stopper portion extending from a peripheral edge of the first protruding plate portion in the circumferential direction in the optical axis direction so as to oppose the second protruding plate portion or the second extending portion in the optical axis direction. In this way, since the optical axis direction stopper portions are uniformly arranged in the circumferential direction, the first annular plate portion and the second annular plate portion can be restricted from approaching to each other in the optical axis direction to a large extent. Therefore, a decrease in the positional accuracy of the movable body can be suppressed. In addition, since the stopper portion can be formed by the shape (second extension portion) for connection to the gimbal mechanism, the complexity of the component shape of the second component can be avoided.

In the present invention, it is preferable that the pair of second extending portions and the pair of second projecting plate portions are each provided with a slit extending in the radial direction and opening at an inner peripheral edge of the second annular plate portion, and the optical axis direction stopper portion extends in the optical axis direction from edges of both sides of the first projecting plate portion in the circumferential direction and surrounds both sides of the slit in the circumferential direction of the first plate spring portion. Thus, the first plate spring portion does not interfere with the optical axis direction stopper portion. Further, the second member and the first plate spring portion can be arranged at positions overlapping each other when viewed from a direction intersecting the optical axis direction. Therefore, the height of the rotation support mechanism in the optical axis direction can be reduced, and the height of the optical unit with the shake correction function in the optical axis direction can be reduced.

In the present invention, it is preferable that the retainer convex portions are provided at corners on both sides in the second axial direction and corners on both sides in the first axial direction, the retainer convex portions provided at corners on both sides in the second axial direction face the second protruding plate portions in the optical axis direction, and the retainer convex portions provided at corners on both sides in the first axial direction face the second extending portion in the optical axis direction. In this way, since the stopper mechanism in the optical axis direction can be configured by the shape (second extending portion) for connecting to the gimbal mechanism, the complexity of the component shape of the second component can be avoided. Further, since the stopper mechanisms in the four optical axis directions are equally arranged in the circumferential direction, the movable body can be restricted from tilting. Therefore, the first annular plate portion and the second annular plate portion can be restricted from approaching to each other in the optical axis direction to a large extent, and a decrease in the positional accuracy of the movable body can be suppressed.

(effects of the invention)

Drawings

Fig. 1 is a perspective view of an optical unit with a shake correction function to which the present invention is applied.

Fig. 2 is an exploded perspective view of the optical unit with the shake correction function.

Fig. 3 is a plan view of the optical unit with the shake correction function with the cover removed from the object side.

Fig. 4 is a cross-sectional view of the optical unit with the shake correction function cut at the A-A position of fig. 3.

Fig. 5 is a cross-sectional view of the optical unit with the shake correction function cut at the B-B position of fig. 3.

Fig. 6 is a perspective view of the movable body and the rotation support mechanism as seen from the object side.

Fig. 7 is a plan view of the movable body and the rotation support mechanism as viewed from the object side.

Fig. 8 is a side view of the movable body and the rotation support mechanism.

Fig. 9 is an exploded perspective view of the rotary support mechanism and the first member.

Detailed Description

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

(integral structure)

Fig. 1 is a perspective view of an optical unit with a shake correction function to which the present invention is applied. Fig. 2 is an exploded perspective view of the optical unit with a shake correction function of fig. 1. Fig. 3 is a plan view of the optical unit with the shake correction function with the cover removed from the object side.

As shown in fig. 1, the optical unit 1 with a shake correction function includes: a movable body 10 provided with a camera module 2; and a fixed body 11 supporting the movable body 10. The fixing body 11 includes: a frame-shaped housing 3 surrounding the movable body 10 from the outer peripheral side; a cover 4 fixed to the housing 3 from the object side; and a base 5 fixed to the housing 3 from the object-side opposite side and covering the movable body from the object-side opposite side. The optical unit 1 with the shake correction function includes a flexible printed board 6 led out from the movable body 10 and a flexible printed board 7 led around along the outer peripheral surface of the housing 3.

The optical unit 1 with the shake correction function is used for optical devices such as a cellular phone with a camera, a car recorder, and the like, and optical devices such as an operation camera and a wearable camera mounted on a moving body such as a helmet, a bicycle, a radio control helicopter, and the like. In such an optical device, if shake of the optical device occurs during photographing, a captured image may be disturbed. In order to avoid tilting of the photographed image, the optical unit 1 with the shake correction function corrects the tilt of the camera module 2 based on the acceleration, angular velocity, shake amount, and the like detected by the detection unit such as a gyroscope.

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

In the following description, three axes orthogonal to each other are defined as an X-axis direction, a Y-axis direction, and a Z-axis direction. One side in the X-axis direction is defined as the-X direction, and the other side is defined as the +x direction. One side in the Y-axis direction is set as the-Y direction, and the other side is set as the +Y direction. One side in the Z-axis direction is set as the-Z direction, and the other side is set as 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 subject side of the camera module 2. The first axis R1 and the second axis R2 are inclined 45 degrees with respect to the X axis and the Y axis about the Z axis (optical axis).

The optical unit 1 with the shake correction function has: a rotation support mechanism 12 that supports the movable body 10 rotatably about the Z axis; 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. The movable body 10 is rotatably supported by the fixed body 11 about the first axis R1 and the second axis R2 via a rotation support mechanism 12 and a gimbal mechanism 13.

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

The optical unit 1 with the shake correction function includes a shake correction magnetic drive mechanism 20 that rotates the movable body 10 about the first axis R1 and the second axis R2. As shown in fig. 3, the shake correction magnetic drive mechanism 20 includes: a first shake correction magnetic drive mechanism 21 that generates a drive force about the X axis on the movable body 10; and a second shake correction magnetic drive mechanism 22 that generates a drive force about the Y axis on the movable body 10. The first and second magnetic driving

mechanisms

21 and 22 for shake correction are arranged in the circumferential direction around the Z axis. In this example, the first shake correction magnetic drive mechanism 21 is disposed in the-Y direction of the camera module 2. The second shake correction magnetic drive mechanism 22 is disposed in the-X direction of the camera module 2.

The movable body 10 rotates about the X-axis and the Y-axis by combining the rotation about the first axis R1 and the rotation about the second axis R2. Thus, the optical unit 1 with the shake correction function performs pitch correction around the X axis and yaw correction around the Y axis.

The optical unit 1 with the shake correction function includes a magnetic driving mechanism 23 for roll correction that rotates the movable body 10 about 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 magnetic driving mechanism 23 for roll correction is disposed in the +y direction of the camera module 2. The magnetic driving mechanism 23 for rolling correction is located on the opposite side of the first magnetic driving mechanism 21 for shake correction with the optical axis L sandwiched therebetween.

(fixed body)

In the fixed body 11, the cover 4 and the base 5 are plate-shaped and made of a non-magnetic metal. As shown in fig. 2, hooks 8 bent at substantially right angles to the case 3 are formed on the outer peripheral edges of the cover 4 and the base 5. The housing 3 is made of resin. The hooks 8 are engaged with protrusions 9 provided on the outer peripheral surface of the housing 3. As shown in fig. 1, the gimbal mechanism 13 and the camera module 2 are disposed inside the opening 4a of the cover 4, and protrude in the +z direction from the cover 4.

The housing 3 includes: a rectangular frame 18 surrounding the movable body 10 and the rotation support mechanism 12 from the outer peripheral side; and a rectangular wiring housing portion 19 disposed in the +x direction of the frame portion 18. The frame 18 includes: a first side plate portion 181 and a second side plate portion 182 that are opposed in the Y-axis direction; and a third side plate portion 183 and a fourth side plate portion 184 opposed in the X-axis direction. The first side plate portion 181 is located in the-Y direction of the second side plate portion 182. The third side plate portion 183 is located in the +x direction of the fourth side plate portion 184.

The frame 18 has a notch 183a (see fig. 3) formed by cutting an end edge of the third side plate 183 in the-Z direction. The flexible printed board 6 connected to the image pickup device 2b is led out in the +x direction from the end portion of the movable body 10 in the-Z direction. The flexible printed board 6 is drawn out in the +x direction of the frame 18 through the notch 183a of the third side plate 183, and is stored in the wiring storage 19.

The wiring housing section 19 includes: a first wall portion 191 and a second wall portion 192 opposing each other in the Y-axis direction; and a third wall portion 193 opposing the third side plate portion 183 of the frame portion 18 in the X-axis direction. The wiring housing portion 19 includes a notch 193a formed by cutting an end edge of the third wall portion 193 in the-Z direction. As shown in fig. 3, the flexible printed circuit board 6 is led inside the wiring housing portion 19 in the direction of the inner surfaces of the third side plate portion 183, the first wall portion 191, and the third wall portion 193, and led outside the wiring housing portion 19 through the notch portion 193a.

As shown in fig. 2, a first coil fixing hole 181a is provided at the first side plate portion 181 of the housing 3. The first coil 21C is fixed in the first coil fixing hole 181a. A second coil fixing hole 184a is provided at the fourth side plate portion 184 of the housing 3. The second coil 22C is fixed to the second coil fixing hole 184a. In addition, a third coil fixing hole 182a is provided at the second side plate portion 182. The third coil 23C is disposed in the third coil fixing hole 182a. The first coil 21C, the second coil 22C, and the third coil 23C are oblong air-core coils long 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 side surface of the movable body 10 in the-Y direction face each other in the Y direction, and the first shake correction magnetic drive mechanism 21 is configured. The second coil 22C fixed to the fourth side plate 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, and constitute a second shake correction magnetic drive mechanism 22. The third coil 23C fixed to the second side plate 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, and the magnetic driving mechanism 23 for roll correction is configured.

The first coil 21C, the second coil 22C, and the third coil 23C are electrically connected to the flexible printed substrate 7. The flexible printed board 7 is fixed to the outer peripheral surface of the frame 18. In the present embodiment, the flexible printed board 7 is wound in this order 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 in the frame portion 18. Although not shown in fig. 1 and 2, the flexible printed circuit board 7 extends from the second side plate 182 to the side surface of the wiring housing 19, and is connected to a power feeding board (not shown) fixed to the wiring housing 19.

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

(Universal frame mechanism)

Fig. 4 and 5 are cross-sectional views of the optical unit 1 with the shake correction function. Fig. 4 is a sectional view taken at A-A of fig. 3, and fig. 5 is a sectional view taken at B-B of fig. 3. As shown in fig. 3 and 5, second connection mechanisms 16 are provided at diagonal positions of the frame 18 in the second axis R2 direction, and the second connection mechanisms 16 connect the gimbal frame 14 and the fixed body 11 to be rotatable about the second axis R2. The second gimbal frame support members 162 are fixed to a pair of recesses 161 provided at diagonal positions in the second axis R2 direction of the frame 18. As shown in fig. 5, the second gimbal frame support member 162 has a sphere 163 and a second thrust support member 164 that fixes the sphere 163. By fixing the second gimbal frame support member 162 to the recess 161, the position of the sphere 163 on the second axis R2 is supported by the fixing body 11. In assembling the gimbal mechanism 13, the gimbal frame 14 is inserted into the inner peripheral side of the second gimbal frame support member 162 so as to be in point contact with the sphere 163 on the second axis R2. Thereby, the second connection mechanism 16 is constituted.

As shown in fig. 3 and 4, first connection mechanisms 15 are provided on both sides of the movable body 10 in the direction of the first axis R1, and the first connection mechanisms 15 connect the gimbal frame 14 and the rotation support mechanism 12 to be rotatable about the first axis R1. The first link mechanism 15 includes first gimbal frame support members 151 fixed to the rotary support mechanism 12 on both sides of the movable body 10 in the first axis R1 direction. As shown in fig. 4, the first gimbal frame support member 151 includes a ball 152 and a first thrust support member 153 that fixes the ball 152. By fixing the first thrust supporting member 153 to the rotation supporting mechanism 12, the position of the ball 152 on the first shaft R1 is supported by the rotation supporting mechanism 12. In assembling the gimbal mechanism 13, the gimbal frame 14 is inserted into the inner peripheral side of the first gimbal frame support 151 so as to be in point contact with the sphere 152 on the first axis R1. Thereby, the first connecting mechanism 15 is constituted.

The gimbal frame 14 is formed of a plate spring made of metal. As shown in fig. 1, 4, and 5, the gimbal frame 14 includes: a gimbal body 140 located in the +z direction of the movable body 10; a pair of first axis side extension portions 141 protruding from the gimbal body portion 140 to both sides in the first axis R1 direction and extending in the-Z direction; and a pair of second shaft side extension portions 142 protruding from the gimbal body portion 140 to both sides in the second shaft R2 direction and extending in the-Z direction. The gimbal frame 14 has an opening 143 penetrating the center of the gimbal body 140 in the Z-axis direction.

As shown in fig. 2 and 4, the pair of first shaft-side extension portions 141 each include a first shaft-side concave curved surface 144 that is recessed toward the inner peripheral side on the first shaft R1 in the first shaft R1 direction toward the movable body 10 side. The first shaft-side extension portion 141 has a protrusion 146 protruding in the direction toward the outer peripheral side in the-Z direction of the first shaft-side concave curved surface 144. Next, the pair of second-shaft-side extending portions 142 each include a second-shaft-side concave curved surface 147 that is formed on the second shaft R2 so as to recess the second shaft R2 toward the inner peripheral side of the movable body 10. In addition, a pair of notches 148 are provided in the +z direction of the second axial concave curved surface 147, which notches are formed by cutting the side edges on both sides in the circumferential direction.

The first thrust support member 153 includes: a plate portion 154 extending in the Z-axis direction; a pair of arm portions 155 bent from side edges of both sides of the plate portion 154 in the circumferential direction toward the movable body 10 side; and a pair of arm portions 156 (see fig. 4 and 6) that are bent from side edges of both sides of the plate portion 154 in the circumferential direction toward the movable body 10 in the-Z direction of the pair of arm portions 155. The sphere 152 is fixed to the plate 154 by welding. As will be described later, the rotation support mechanism 12 includes a pair of second extension portions 47 extending in the-Z direction on both sides of the first axis R1 of the movable body 10, and distal ends of the

arm portions

155, 156 of the first gimbal frame support member 151 are fixed to distal ends of the second extension portions 47 by welding. The distal end portion of the second extension portion 47 has a pair of protruding portions 157 bent from the side edges on both sides in the circumferential direction to the outer circumferential side, and the protruding portions 157 are fitted between the

arm portions

155, 156.

When the gimbal mechanism 13 is assembled, the first shaft-side extension 141 of the gimbal frame 14 is deflected to the inner peripheral side and inserted into the inner peripheral side of the first gimbal frame support 151. Accordingly, the first shaft-side extending portions 141 are biased toward the outer peripheral side, and therefore the first shaft-side concave curved surfaces 144 of the first shaft-side extending portions 141 can be kept in contact with the balls 152 of the first gimbal frame support members 151. Further, the protruding portion 146 provided at the tip end of the first shaft-side extending portion 141 protrudes radially outward from the plate portion 154 in the-Z direction side (see fig. 4). This prevents the gimbal frame 14 from falling off the first gimbal frame support 151 in the +z direction.

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

When the gimbal mechanism 13 is assembled, the second axial extension 142 of the gimbal frame 14 is deflected to the inner peripheral side and inserted into the inner peripheral side of the second gimbal frame support member 162. As a result, the second shaft side extending portions 142 are biased toward the outer peripheral side, and therefore, the second shaft side concave curved surfaces 147 of the second shaft side extending portions 142 can be maintained in contact with the balls 163 of the second gimbal frame support members 162. The arm 167 of the second thrust supporting member 164 is fitted into the notch 148 of the second shaft-side extension 142. This prevents the gimbal frame 14 from falling off the second gimbal frame support 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 viewed from the object side. Fig. 8 is a side view of the movable body 10 and the rotation support mechanism 12, as viewed from the second axis R2 direction. Fig. 9 is an exploded perspective view of the rotation support mechanism 12 and the first member 25. As shown in fig. 4, 5, and 6, the movable body 10 includes: a camera module 2; a frame-shaped holder 24 for holding the camera module 2; and a first member 25 fixed to the holder 24. The holder 24 is made of resin, and the first member 25 is made of magnetic metal.

As shown in fig. 6 and 9, the first member 25 includes: a first annular plate portion 26 surrounding the optical axis L and overlapping the outer peripheral portion of the camera module 2 from the +z direction; and a first extending portion 27 protruding from the first annular plate portion 26 toward the outer peripheral side and bent in the outer peripheral side of the camera module 2 in the-Z direction to be connected to the holder 24. In the present embodiment, the rotation support mechanism 12 is disposed in a gap in the Z-axis direction (optical axis direction) between the first annular plate portion 26 and the camera module 2. In addition, the first member 25 has first protruding plate portions 28 provided at four locations around the optical axis L. The first protruding plate portions 28 protrude from the first annular plate portion 26 in four directions, that is, two sides in the first axis R1 direction and two sides in the second axis R2 direction.

The first extending portion 27 is disposed at three positions of the first annular plate portion 26 in the-X direction, +y direction, and in the-Y direction. The angular position where the first extension portion 27 is disposed is the angular position where the first magnet 21M and the second magnet 22M of the shake correction magnetic drive mechanism 20 and the third magnet 23M of the roll correction magnetic drive mechanism 23 are disposed. The first extension portion 27 includes: a first extending portion first portion 271 extending from the first annular plate portion 26 to the outer peripheral side and bent in the-Z direction; and a rectangular first extension portion second portion 272 connected to a front end of the first extension portion first portion 271 in the-Z direction, the circumferential width being wider than the first extension portion first portion 271. The first extension second portion 272 is secured to the holder 24.

As shown in fig. 4 and 5, the camera module 2 includes a camera module body 30A and a camera module cylindrical portion 30B protruding in the +z direction from the center of the camera module body 30A. The lens 2a is accommodated in the camera module cylindrical portion 30B. The holder 24 surrounds the camera module body 30A from the outer peripheral side. The camera module cylindrical portion 30B protrudes in the +z direction from a circular hole 26a (see fig. 6 and 9) provided in the center of the first annular plate portion 26, and is disposed in an opening 143 (see fig. 1) of the gimbal frame 14.

As shown in fig. 7, the contour shape of the camera module body 30A and the holder 24 is substantially octagonal when viewed from the +z direction. The holder 24 includes: a first side wall 31 and a second side wall 32 extending parallel to the X direction; and third and

fourth sidewalls

33 and 34 extending parallel to the Y direction. The first side wall 31 is located in the-Y direction of the second side wall 32. The third side wall 33 is located in the +x direction of the fourth side wall 34. A notch 33a is provided at an end edge of the third side wall 33 in the-Z direction, and the notch 33a allows the flexible printed board 6 led out in the +x direction from the end of the camera module 2 in the-Z direction to pass through.

The holder 24 further includes: a fifth side wall 35 and a sixth side wall 36 located diagonally to the first axis R1 direction; and seventh and

eighth sidewalls

37 and 38 located diagonally to the second axis R2 direction. The fifth side wall 35 is located in the-X direction of the sixth side wall 36. The seventh sidewall 37 is located in the-X direction of the eighth sidewall 38. As shown in fig. 6, retainer projections 39 protruding 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 magnet 21M is fixed to the first side wall 31 of the holder 24, and the second magnet 22M is fixed to the third side wall 33. The first magnet 21M and the second magnet 22M are magnetized to two poles in the Z-axis direction. The magnetization split 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 such that the same pole faces the Z-axis direction. The third magnet 23M is fixed to the fourth side wall 34 of the holder 24. The third magnet 23M is 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 disposed on the opposite side of the first magnet 21M with the optical axis L therebetween.

As shown in fig. 7, the first, second, and

third magnets

21M, 22M, and 23M are accommodated in the concave portions 40, and the concave portions 40 are formed on the outer peripheral surfaces of the first, second, and

fourth side walls

31, 32, and 34 of the holder 24. The first magnet 21M, the second magnet 22M, and the third magnet 23M are positioned in the Z-axis direction by abutting against a bottom surface 41 (see fig. 8) provided at the end of each recess 40 in the-Z direction from the +z direction.

The three concave portions 40 are formed with groove portions 42 on inner surfaces of both circumferential sides, respectively. As shown in fig. 7, the first extension portion second portions 272 provided at the front ends of the first extension portions 27 in the-Z direction are inserted into the respective concave portions 40. Both ends of the first extending portion second portion 272 in the circumferential direction are inserted into the groove portions 42, and are fixed to the respective concave portions 40 by an adhesive. The first extension portion second portion 272 is inserted into the radial inner sides of the first magnet 21M, the second magnet 22M, and the third magnet 23M. The first extension portion second portion 272 is made of a magnetic metal, and thus 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 opposed to the first annular plate portion 26 of the first member 25 in the Z-axis direction; and a metal member 50 connecting the first annular plate portion 26 and the second annular plate portion 46. The metal member 50 includes: an annular movable body side 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 plate spring portion 53 connecting the movable body side fixing portion 51 and the fixed body side fixing portion 52. The leaf spring portion 53 includes: a first plate spring portion 54 elastically deformed in a circumferential direction around the optical axis; and a second plate spring portion 55 elastically deformed 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 protruding from the second annular plate portion 46 to both sides in the first axis R1 direction; and a pair of second protruding plate portions 48 protruding from the second annular plate portion 46 to both sides in the second axial direction R2. The first shaft-side extending portions 141 of the gimbal frame 14 are rotatably connected to the pair of second extending portions 47 about the first shaft R1 (see fig. 4). Accordingly, the second member 45 is supported by the gimbal mechanism 13 so as to be rotatable about the first axis R1.

The pair of second extension portions 47 each include: a second extension portion first portion 471 extending from the second annular plate portion 46 in the first axis R1 direction; and a second extension portion second portion 472 extending in the Z-axis direction on the outer peripheral side of the movable body 10. As shown in fig. 4, the second extension portion second portion 472 faces the movable body 10 with a slight gap therebetween on the outer side of the movable body 10 in the first axis R1 direction. As shown in fig. 4 and 7, the first gimbal frame support member 151 is fixed to the surface of the second extension portion 472 on the opposite side of the movable body 10.

(Metal parts)

As shown in fig. 9, the metal member 50 is assembled from two members, that is, a first metal member 56 fixed to the second annular plate portion 46 and a second metal member 57 fixed to the first annular plate portion 26. The first metal member 56 and the second metal member 57 are manufactured by bending a metal plate after etching. The first metal member 56 and the second metal member 57 are different in plate thickness, and the first metal member 56 is smaller in plate thickness than the second metal member 57. For example, in the present embodiment, the first metal member 56 has a plate thickness of 30 μm, and the second metal member 57 has a plate thickness of 70 μm. Therefore, the spring constant of the first plate spring portion 54 provided on the first metal member 56 is smaller than that of the second plate spring portion 55 provided on the second metal member 57.

(first metal part)

The first metal member 56 includes: an annular fixed body side fixing portion 52; and a first plate spring portion 54 connected to an edge of a first cutout portion 58 formed by cutting an 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 fixed portion 52, and the first plate spring portion 54 is bent substantially at right angles from the first edge portion 59, is bent so as to be oriented in the plate thickness direction in the circumferential direction of the fixed body side fixed portion 52, and extends radially outward of the fixed body side fixed portion 52. When the fixed body side fixing portion 52 is fixed to the second annular plate portion 46, the first plate spring portion 54 is arranged to stand in the +z direction with respect to the second annular plate portion 46, and the plate thickness direction is oriented in the circumferential direction around the optical axis and extends radially outward around the optical axis L. Therefore, the first plate spring portion 54 is elastically deformed in the circumferential direction around the optical axis L.

Four first cutout portions 58 are provided at the outer peripheral edge of the fixed body side fixing portion 52 at intervals in the circumferential direction, and the first plate spring portion 54 extends radially outward from the first edge portion 59 of each first cutout portion 58. Here, the second member 45, which is the counterpart member to which the fixed body side fixing portion 52 is fixed, is formed with second slits 49 extending radially outward from the inner peripheral edge of the second annular plate portion 46 at four positions. The second slit 49 extends radially at the respective circumferential centers of the pair of second extending portions 47 and the pair of second projecting plate portions 48. Therefore, the second member 45 is provided with four second slits 49 extending radially at four positions on both sides in the first axis R1 direction and both sides in the second axis R2 direction. The first metal member 56 is positioned so that the four first plate spring portions 54 are disposed in the second slits 49, respectively, and is fixed to the second annular plate portion 46. Thus, the four first plate spring portions 54 are radially arranged on both sides in the first axis R1 direction and both sides in the second axis R2 direction about the optical axis L.

The first metal member 56 is configured such that the bending directions of the metal plates at the portions where the four first plate spring portions 54 are connected to the fixed body side fixing portions 52 are not aligned in the same direction. Specifically, in the circumferentially adjacent two first plate spring portions 54, the bending directions of the metal plates at the portions bent in the +z direction from the fixed body side fixing portions 52 are opposite. As shown in fig. 9, in the present embodiment, the positions of the first edge portions 59 connected to the first plate spring portion 54 are circumferentially opposite from each other in the circumferentially adjacent two first cutout portions 58. Therefore, one of the first plate 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 cutout portion 58, and the other of the first plate spring portions 54 adjacent in the circumferential direction is bent in the +z direction from the edge (first edge portion 59) on the other side in the circumferential direction of the first cutout portion 58.

When the bending directions of the first plate spring portions 54 are aligned in the same direction, when there is an error in the bending angle of the first plate spring portions 54 at the time of manufacturing the first metal member 56, a positional displacement in the circumferential direction of the first plate spring portions 54 occurs in the same direction, and therefore, the first member 25 and the second member 45 are displaced in the circumferential direction. As a result, there is a problem in that the rotational position (initial position) of the movable body 10 is shifted when not energized. However, in the present embodiment, since the bending directions of the first plate spring portions 54 adjacent in the circumferential direction are opposite in the circumferential direction, even if there is an error in the bending angle, the positional displacement of the first member 25 and the second member 45 in the circumferential direction can be avoided, and the rotational position (initial position) of the movable body 10 when not energized can be avoided.

The first plate spring portion 54 includes: a first arm 541 and a second arm 542 extending in a radial direction about the optical axis L; and a connecting portion 543 connecting the first arm portion 541 and the second arm portion 542. In the present embodiment, the first arm 541, the second arm 542, and the connecting portion 543 are disposed on the same plane. The first arm 541 and the second arm 542 extend in the radial direction at positions adjacent in the optical axis direction, and the connecting portion 543 connects radially outer ends of the first arm 541 and the second arm 542 in a reverse folded-back shape in the radial direction. The first arm 541 is located in the-Z direction of the second arm 542, and is connected to the first edge 59 of the fixed body side fixing portion 52. A rectangular first engagement portion 544 that is engaged with the second plate spring portion 55 by welding or the like is provided at an end portion of the second arm portion 542 on the radially inner side.

As shown in fig. 4 and 5, the radial center portion of the first plate spring portion 54 is bent in the-Z direction, and is received in the second slit 49 provided in the second extension portion first portion 471 or the second protruding plate portion 48. The tip end portion of the first plate spring portion 54 extends radially outward while being inclined in the +z direction, and is located in the +z direction of the second extension portion first portion 471 or the second protruding plate portion 48 at a position radially outward of the tip end of the second slit 49. The radial length of the first protruding plate portion 28 arranged in the +z direction of the first plate spring portion 54 is shorter than the first plate spring portion 54, and therefore, the tip end portion of the first plate spring portion 54 does not interfere with the first protruding plate portion 28. With such a configuration, the radial length of the first plate spring portion 54 is ensured, the height of the rotation support mechanism 12 in the optical axis direction is reduced, and the outer diameter of the rotation support mechanism 12 as viewed from the optical axis direction is reduced, so that the rotation support mechanism 12 can be made compact.

(second metal part)

The second metal member 57 includes: an annular movable body side fixing portion 51; and a second plate spring portion 55 connected to an edge of a second cutout portion 60 formed by cutting an inner peripheral edge of the movable body side fixed portion 51. The second cutout 60 includes a second edge 61 intersecting the radial direction of the movable body side fixed portion 51, and the second plate spring 55 is bent at a substantially right angle from the second edge 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 where 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 +z-direction surface of the first annular plate portion 26, the second plate spring portion 55 extends in the-Z direction with respect to the first annular plate portion 26, and is arranged so as to extend in the circumferential direction in a plane intersecting the radial direction in a state where the plate thickness direction is oriented in the radial direction around the optical axis. Therefore, the second plate spring portion 55 is elastically deformed in the radial direction around the optical axis L.

Four second notches 60 are provided on the inner peripheral edge of the movable body side fixed portion 51 at circumferentially spaced intervals. In addition, the third notched portions 62 are provided at four locations, and the third notched portions 62 are formed by cutting out portions adjacent to the second edge portions 61 of the respective second notched portions 60 in the circumferential direction to the outer circumferential side to be large. Further, at the outer peripheral edge of the movable body side fixed portion 51, protrusions 63 are provided at four positions so that the outer peripheral edge of each third cutout 62 protrudes radially outward. A rectangular second engagement portion 551 bent substantially at right angles to the radial outer side is provided at the tip end of the second plate spring portion 55. The second joint 551 and the first joint 544 of the first plate spring portion 54 are joined by welding, whereby the first plate spring portion 54 and the second plate spring portion 55 are connected to form the plate spring portion 53. The second plate spring portion 55 extends in the circumferential direction toward the third cutout portion 62 after being bent at a substantially right angle from the second edge portion 61, and therefore, the welded portion between the second joint portion 551 and the first joint portion 544 is disposed in the third cutout portion 62 so as not to interfere with the inner peripheral edge of the movable body side fixed portion 51.

Here, the first member 25, which is the counterpart member of the fixed movable body side fixed portion 51, is provided with first slits 29 extending radially outward from the inner peripheral edge of the first annular plate portion 26 at four locations. The first slit 29 extends in the radial direction at the center of the first protruding plate portion 28 in the circumferential direction protruding from the first annular plate portion 26 in four directions, i.e., the first axis R1 direction and the second axis R2 direction. Therefore, the first member 25 is provided with four first slits 29 extending radially at four positions on both sides in the first axis R1 direction and both sides in the second axis R2 direction. The four first slits 29 overlap with the second slits 49 provided on the second member 45, respectively, as viewed in the optical axis direction. The first member 25 is provided with notch portions 69 formed by cutting portions adjacent to the first slits 29 in the circumferential direction at four positions. The notch 69 is provided at a position overlapping the third notch 62 of the movable body side fixed portion 51. The second metal member 57 is positioned and fixed to the first annular plate portion 26 in such a manner that the four second plate spring portions 55 are arranged in the notch portion 69, and the second joint portion 551 provided at the tip end of the second plate spring portion 55 is arranged in the center in the circumferential direction of the first slit 29.

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

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 at the time of manufacturing the second metal member 57, a positional displacement in the circumferential direction of the second plate spring portions 55 occurs in the same direction, and therefore, the first member 25 and the second member 45 are displaced in the circumferential direction. As a result, there is a problem in that the rotational position (initial position) of the movable body 10 is shifted when not energized. However, in the present embodiment, since the bending directions of the second plate 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 positional displacement of the first member 25 and the second member 45 in the circumferential direction can be avoided, and the rotational position (initial position) of the movable body 10 when not energized can be avoided.

(radial stop mechanism)

The rotation support mechanism 12 includes a radial stopper 64 extending from the outer peripheral edge of the second annular plate portion 46 to the outer peripheral side of the first annular plate portion 26 by bending in the +z direction. The radial stopper 64 collides with the outer peripheral edge of the second annular plate 46, thereby restricting the radial positional displacement of the first annular plate 26 and the second annular plate 46. In the present embodiment, the radial gap T1 between the radial stopper 64 and the outer peripheral end surface of the first annular plate portion 26 is set to 0.1mm (see fig. 7).

As shown in fig. 7 and 9, the radial stopper portion 64 is disposed at one position between the first and second extending

portions

27 and 47 adjacent to each other in the circumferential direction and between the first and second projecting

plate portions

27 and 48 adjacent to each other in the circumferential direction. The radial stopper 64 is disposed at one position between the first rotation restricting portion 71 and the second extending portion 47, and between the first rotation restricting portion 71 and the second projecting plate portion 48, respectively. Therefore, the radial stopper 64 is disposed at eight positions. The eight radial stops 64 are disposed substantially equally about the optical axis.

(optical axis direction stop mechanism)

The rotation support mechanism 12 includes, as a stopper mechanism for restricting the movement range in the +z direction of the second member 45, an optical axis direction stopper 65 provided on the first member 25 and an extension 66 provided on the second member 45 and opposed to the optical axis direction stopper 65 in the Z axis direction (optical axis direction). As shown in fig. 6, 8, and 9, the optical axis direction stopper 65 extends in the-Z direction by being bent at a substantially right angle from the circumferential edge of the first projecting plate portion 28. The extension 66 is provided at the circumferential end of the second extension portion first portion 471 and the circumferential end of the second protruding plate portion 48. The optical axis direction stopper 65 collides with the extension 66 to limit the movement range of the second member 45 in the +z direction with respect to the first member 25. In the present embodiment, the clearance T2 between the optical axis direction stopper 65 and the extension 66 in the Z axis direction is set to 0.1mm (see fig. 8).

In the present embodiment, a pair of axial stop portions 65 are provided at both circumferential side edges of each first projecting plate portion 28. As shown in fig. 6 and 8, the first projecting plate portion 28 and the pair of axial direction stopper portions 65 are shaped like a gate when viewed in the radial direction, and are arranged so as to surround the first plate spring portion 54 arranged in the second slit 49 from both sides in the circumferential direction and the +z direction. The extension portions 66 are provided at both circumferential ends of the second extension portion first portion 471 and both circumferential ends of the second protruding plate portion 48. Therefore, the second extension portion first portion 471 and the second protruding plate portion 48 are formed in a shape in which a radially inner portion provided with the extension portion 66 is wider than a radially outer portion provided with no extension portion 66 in the circumferential direction.

The rotation support mechanism 12 includes, as a stopper mechanism for restricting the movement range of the second member 45 in the-Z direction: a holder convex portion 39 provided at four positions of the holder 24, that is, at diagonal positions in the first axis R1 direction and at diagonal positions in the second axis R2 direction; and a tip end portion of a second protruding plate portion 48 provided on the second member 45 and extending to a position opposed to the holder convex portion 39 in the Z-axis direction, and a second extension portion first portion 471.

As shown in fig. 8, the front end of the holder projection 39 in the +z direction protrudes in the +z direction more than the end surface of the camera module body 30A in the +z direction. Therefore, the clearance between the distal end surface of the holder projection 39 and the second projecting plate portion 48 or the second extension portion first portion 471 in the Z-axis direction is smaller than the clearance between the camera module 2 and the second projecting plate portion 48 or the second extension portion first portion 471 in the Z-axis direction. Therefore, the movement range of the second member 45 in the-Z direction is restricted by the retainer projection 39 colliding with the second projecting plate portion 48 or the second extension portion first portion 471. In the present embodiment, the clearance T3 between the retainer projection 39 and the second projecting plate portion 48 in the Z-axis direction is set to 0.1mm (see fig. 8). The clearance between the holder convex portion 39 and the second extension portion first portion 471 in the Z-axis direction is set to 0.1mm in the same manner.

(rotation limiting mechanism)

The rotation support mechanism 12 includes a rotation restriction mechanism 70 that restricts the rotation range of the movable body 10 about the optical axis L. As shown in fig. 6 and 7, the rotation limiting mechanism 70 includes a first rotation limiting portion 71 provided on the first member 25 and a second rotation limiting portion 72 provided on the second member 45. The first rotation restriction portion 71 protrudes from the first annular plate portion 26 toward the outer peripheral side (in the +x direction in the present embodiment) and is curved in the-Z direction. The front end of the first rotation restriction portion 71 in the-Z direction is fixed to the third side wall 33 of the holder 24.

The second rotation restriction portion 72 is a protruding portion that extends from the outer peripheral edge of the second annular plate portion 46 to a position facing the first rotation restriction portion 71 in the circumferential direction by being bent in the +z direction (optical axis direction). The second rotation restricting portions 72 are provided one at each of both sides in the circumferential direction of the first rotation restricting portion 71. In the present embodiment, the first rotation restricting portion 71 is integrally formed with the radial stopper portion 64 that restricts the radial position displacement of the first annular plate portion 26 and the second annular plate portion 46. The second rotation restricting portions 72 of two portions surround both sides of the first rotation restricting portion 71 in the circumferential direction. Therefore, the range of rotation of the movable body 10 about the optical axis L with respect to the second member 45 is restricted by the collision of the first rotation restricting portion 71 and the second rotation restricting portion 72.

(main effects of the present embodiment)

As described above, the optical unit 1 with a shake correction function according to the present embodiment includes: a movable body 10 provided with a camera module 2; a fixed body 11; and a rotation support mechanism 12 that supports the movable body 10 rotatably about the optical axis L of the camera module 2 with respect to the fixed body 11. The movable body 10 includes a first member 25, and the first member 25 includes a first annular plate portion 26 surrounding the optical axis L and overlapping the camera module 2 when viewed in the Z-axis direction (optical axis direction). The rotation support mechanism 12 has: a second member 45 having a second annular plate portion 46 opposed to the first annular plate portion 26 in the Z-axis direction (optical axis direction) and connected to the fixed body 11; a metal member 50 having a movable body side fixing portion 51 fixed to the first annular plate portion 26, a fixed body side fixing portion 52 fixed to the second annular plate portion 46, and a plate spring portion 53 connecting the movable body side fixing portion 51 and the fixed body side fixing portion 52 and elastically deformable in a circumferential direction around the optical axis; and a radial stopper 64 extending from an edge of the second annular plate portion 46 in the +z direction and radially opposed to an edge of the first annular plate portion 26.

According to the present embodiment, the rotation support mechanism 12 connecting the movable body 10 and the fixed body 11 is configured by connecting two annular plate portions (the first annular plate portion 26 and the second annular plate portion 46) by a plate spring portion 53 that is elastically deformable in the circumferential direction. Therefore, the movable body 10 can be supported rotatably about 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 structure of the rotation support mechanism 12 can be simplified. Further, since the radial stopper 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 46 can be restrained from relatively moving in the radial direction to a large extent. Therefore, breakage of the plate spring portion 53 that supports the movable body 10 rotatably about the optical axis can be prevented. In addition, a decrease in the positional accuracy of the movable body 10 can be suppressed.

In addition, a radial stop may be provided at the edge of the first annular plate portion 26. That is, a radial stopper portion extending from the edge of the first annular plate portion 26 in the-Z direction and facing the edge of the first annular plate portion 26 in the radial direction may be provided. In addition, the radial stopper portion may be provided not at the outer peripheral edge of the first annular plate portion 26 or the second annular plate portion 46 but at the inner peripheral edge. Even with such a configuration, the first annular plate portion 26 and the second annular plate portion 46 can be restrained from being displaced in the radial direction. Therefore, breakage of the plate spring portion 53 can be prevented, and a decrease in positional accuracy of the movable body 10 can be suppressed.

In the present embodiment, since the optical axis direction stopper 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 annular plate portion 46 can be restricted from approaching in the Z axis direction (optical axis direction). Therefore, breakage of the plate spring portion 53 can be prevented, and a decrease in positional accuracy of the movable body 10 can be suppressed.

The optical axis direction stopper may extend from the second member 45 in the +z direction and face the first member 25 in the Z axis direction (optical axis direction). Even with such a configuration, the first annular plate portion 26 and the second annular plate portion 46 can be restricted from approaching in the Z-axis direction (optical axis direction). Therefore, breakage of the plate spring portion 53 can be prevented, and a decrease in positional accuracy of the movable body 10 can be suppressed.

In the present embodiment, the movable body 10 includes a holder 24 for holding the camera module 2. The second annular plate portion 46 is disposed 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 includes a holder convex portion 39 protruding in the Z-axis direction (optical axis direction), and a gap between the front end surface of the holder convex portion 39 and the Z-axis direction (optical axis direction) of the second member 45 is narrower than a gap between the camera module 2 and the Z-axis direction (optical axis direction) of the second member 45. Therefore, the first annular plate portion 26 and the second annular plate portion 46 can be restricted from being separated largely in the Z-axis direction (optical axis direction), and therefore, a decrease in the positional accuracy of the movable body 10 can be suppressed. In addition, since the height of the holder convex portion 39 can be easily changed, the clearance in the optical axis direction can be easily managed.

In the present embodiment, the rotation limiting mechanism 70 that limits the rotation range of the movable body 10 around the optical axis L is provided, and the rotation limiting mechanism 70 includes: a first rotation restriction portion 71 extending from the first annular plate portion 26 to the outer peripheral side; 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 restriction portion 71 and the second rotation restriction portion 72 is disposed on both sides of the other of the first rotation restriction portion 71 and the second rotation restriction portion 72 in the circumferential direction. In this way, the rotation restricting mechanism 70 can be configured to be circumferentially opposed between the first annular plate portion 26 and the second annular plate portion 46. Therefore, the rotation range of the movable body 10 can be limited. In addition, since the arrangement of the first rotation restriction portion 71 and the second rotation restriction portion 72 can be easily changed, the management of the rotation range is easy. Further, since the rotation restricting mechanism 70 can be disposed on the outer peripheral side, the rotation range can be managed with high accuracy.

Instead of the second rotation restriction portion 72 surrounding the first rotation restriction portion 71 on both sides in the circumferential direction, the first rotation restriction portion 71 may surround the second rotation restriction portion 72 on both sides in the circumferential direction. That is, the rotation limiting mechanism 70 may be configured such that one of the first rotation limiting portion 71 and the second rotation limiting portion 72 surrounds both circumferential sides of the other of the first rotation limiting portion 71 and the second rotation limiting portion 72. The first rotation restricting portion 71 may extend in the optical axis direction, and the second rotation restricting portion 72 may extend to the outer peripheral side.

In the present embodiment, the plate spring portion 53 has a first plate spring portion 54 having a plate thickness direction oriented in the circumferential direction. The first plate spring portion 54 includes: a first arm 541 extending in the radial direction about the optical axis L; a second arm 542 extending in the radial direction at a position adjacent to the first arm 541 in the Z-axis direction (optical axis direction); and a connecting portion 543 that connects the first arm 541 and the second arm 542 in a radially folded-back shape. In this way, the leaf spring shape having a longer plate thickness direction in the circumferential direction and the radial direction is easily 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 rolling correction magnetic driving mechanism 23 can be miniaturized. Further, 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 lifted. This can simplify the structure of the rotation support mechanism 12, and therefore, the component cost can be reduced, and the assembly work can be facilitated.

In the present embodiment, the plate spring portion 53 includes a second plate spring portion 55 having a plate thickness direction directed in the radial direction, and the second plate spring portion 55 connects the movable body side fixed portion 51 and the first plate spring portion 54. Therefore, when an impact due to dropping or the like is applied, the second plate spring portion 55 elastically deforms to alleviate the impact applied to the first plate spring portion 54 in the radial direction. This can suppress plastic deformation of the first plate spring portion 54, and can suppress buckling of the first plate spring portion 54 that is long in the radial direction, and therefore can improve impact resistance.

In addition, the second plate spring portion 55 may be disposed between the fixed body side fixing portion 52 and the first plate spring portion 54 instead of between the movable body side fixing portion 51 and the first plate spring portion 54, and the second plate spring portion 55 may connect the fixed body side fixing portion 52 and the first plate spring portion 54. For example, the second plate spring portion 55 may be provided on the first metal member 56, and the first plate spring portion 54 may be provided on the second metal member 57. In this configuration, as in the above embodiment, the second plate spring portion 55 can be elastically deformed to suppress plastic deformation of the first plate spring portion 54.

In the present embodiment, the metal member 50 has: a first metal member 56 having an annular fixed body side fixing portion 52 and a first plate spring portion 54 bent in the optical axis direction and extending in the radial direction from an edge (first edge portion 59) of a first cutout portion 58 provided in the fixed body side fixing portion 52; and a second metal member 57 having an annular movable body side fixed portion 51 and a second plate spring portion 55 bent in the optical axis direction from an edge (second edge portion 61) of a second cutout portion 60 provided in the movable body side fixed portion 51 and extending in a circumferential direction around the optical axis, a tip end of the second plate spring portion 55 being joined to the first plate spring portion 54. In this way, by dividing the metal member 50 having the plate spring portions 53 into two members and joining them together, a part of the plurality of plate spring portions 53 can be integrated with the fixed body side fixing portion 52 or the movable body side fixing portion 51 in each member. Therefore, the number of components can be reduced, and the rotary support mechanism 12 can be easily assembled. In addition, the positional accuracy of each plate spring portion 53 can be improved.

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

The plate spring portions 53 may be disposed at least three positions around the optical axis in a dispersed manner, or may be disposed at five or more positions. If the plate spring portions 53 are disposed in at least three positions, the movable body 10 can be supported in a balanced manner, and the inclination of the movable body 10 with respect to the optical axis L can be restricted.

In the present embodiment, the gimbal mechanism 13 is provided, and the gimbal mechanism 13 rotatably supports the rotation support mechanism 12 about a first axis R1 intersecting the optical axis L, and rotatably supports the rotation support mechanism 12 about a second axis R2 intersecting the optical axis L and the first axis R1, and the second member 45 is rotatably supported about the first axis R1 by the gimbal mechanism 13, and the fixed body 11 supports the movable body 10 via the rotation support mechanism 12 and the gimbal mechanism 13. In this way, the unit that rotates around the optical axis does not include the gimbal mechanism 13, and therefore, a large rotation space does not need to be ensured. Therefore, the outer shape of the optical unit 1 with the shake correction function can be reduced.

In the present embodiment, the second member 45 includes: a pair of second extending portions 47 protruding from the second annular plate portion 46 to both sides in the first axis R1 direction; and a pair of second protruding plate portions 48 protruding from the second annular plate portion 46 to both sides in the second axial R2 direction, the pair of second extending portions 47 being connected to the gimbal mechanism 13, the first member 25 being provided with the first protruding plate portions 28 protruding from the first annular plate portion 26 to both sides in the first axial R1 direction and both sides in the second axial R2 direction, and the optical axis direction stopper portions 65 extending from the circumferential edges of the first protruding plate portions 28 in the Z axis direction (optical axis direction) to face the second protruding plate portions 48 or the second extending portions 47 in the Z axis direction (optical axis direction). In this way, since the optical axis direction stopper portions 65 are uniformly arranged in the circumferential direction, the first annular plate portion 26 and the second annular plate portion 46 can be restricted from approaching largely in the Z-axis direction (optical axis direction). Therefore, a decrease in the positional accuracy of the movable body 10 can be suppressed. Further, since the stopper portion can be formed by the shape (the second extending portion 47) for connection to the gimbal mechanism 13, the complexity of the component shape of the second component 45 can be avoided.

In the present embodiment, four first leaf spring portions 54 are provided so as to be circumferentially distributed, and slits (second slits 49) that extend in the radial direction and open at the inner peripheral edge of the second annular plate portion 46 are provided in the pair of second extension portions 47 and the pair of second projection plate portions 48, respectively, and the optical axis direction stopper portions 65 extend in the Z-axis direction (optical axis direction) from the edges on both circumferential sides of the first projection plate portion 28 so as to surround both circumferential sides of the first leaf spring portions 54 that are disposed in the slits (second slits 49). Thus, the first plate spring portion 54 and the optical axis direction stopper portion 65 do not interfere with each other. The second member 45 and the first plate spring portion 54 can be arranged at positions overlapping each other when viewed from a 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 the shake correction function in the Z-axis direction (optical axis direction) can be reduced.

In the present embodiment, the holder convex portions 39 are provided at the corners on both sides in the second axis R2 direction and at the corners on both sides in the first axis R1 direction, the holder convex portions 39 provided at the corners on both sides in the second axis R2 direction are opposed to the second protruding plate portions 48 in the Z axis direction (optical axis direction), and the holder convex portions 39 provided at the corners on both sides in the first axis R1 direction are opposed to the second extending portion 47 in the Z axis direction (optical axis direction). In this way, since the stopper mechanism in the Z-axis direction (optical axis direction) can be configured by the shape (second extension portion 47) for connection with the gimbal mechanism 13, the complexity of the component shape of the second component 45 can be avoided. Further, since the stopper mechanisms at four positions are equally arranged in the circumferential direction, the inclination of the movable body 10 can be restricted. Therefore, the first annular plate portion 26 and the second annular plate portion 46 can be restricted from approaching largely in the Z-axis direction (optical axis direction), and breakage of the plate spring portion 53 can be prevented. In addition, a decrease in the positional accuracy of the movable body 10 can be suppressed.

Reference numerals

1 … an optical unit with a shake correction function; 2 … camera module; 2a … lens; 2b … imaging elements; 3 … shell; 4 … cover; 4a … opening portions; 5 … base; 6. 7 … flexible printed substrate; 8 … hooks; 9 … projections; 10 … movable body; 11 … fixture; 12 … rotary support mechanism; 13 … gimbal mechanism; 14 … gimbal frame; 15 … first connecting means; 16 … second coupling mechanism; 17 … magnetic plate; 18 … frame portion; 19 … wiring housing part; 20 … magnetic driving mechanism for shake correction; 21 … first shake correction magnetic drive mechanism; 21C … first coil; 21M … first magnet; 22 … second magnetic driving means for shake correction; 22C … second coil; 22M … second magnet; 23 … magnetic driving mechanism for rolling correction; 23C … third coil; 23M … third magnet; 24 … holder; 25 … first part; 26 … first annular plate portion; 26a … circular holes; 27 … first extension; 28 … first projecting plate portions; 29 … slit; 30a … camera module body; 30B … camera module cylinder portion; 31 … first side wall; 32 … second side wall; 33 … third side wall; 33a … notch portion; 34 … fourth side wall; 35 … fifth side wall; 36 … sixth side wall; 37 … seventh side wall; 38 … eighth side wall; 39 … retainer tab; 40 … recess; 41 … bottom surface; 42 … groove portions; 45 … second part; 46 … second annular plate portion; 47 … second extension; 48 … second projecting plate portions; 49 … second slit; 50 … metal parts; 51 … movable body side fixing portions; 52 … fixing body-side fixing portions; 53 … leaf spring portions; 54 … first leaf spring portion; 55 … second leaf spring portion; 56 … first metal part; 57 … second metal part; 58 … first cutout portion; 59 … first edge; 60 … second cutout portions; 61 … second edge; 62 … third notch portion; 64 … radial stop; 65 … optical axis direction stopper; 66 … extension; 69 … notch portion; 70 … rotation limiting mechanism; 71 … first rotation limiting portions; 72 … second rotation limiter; 140 … gimbal frame body; 141 … first shaft-side extension portion; 142 … second axially extending portions; 143 … opening portions; 144 … first axial concave curved surface; 146 … projections; 147 … second axial concave curved surface; 148 … notch; 151 … first gimbal frame support pieces; 152 … spheres; 153 … first thrust bearing member; 154 … plate portion; 155. 156 … arm; 157 … projections; 161 … recess; 162 … second gimbal frame support piece; 163 … spheres; 164 … second thrust bearing member; 165 … plate portion; 167 … arm; 181 … first side panel portion; 181a … first coil fixing holes; 182 … second side panel portion; 182a … third coil fixing hole; 183 … third side panel portion; 183a … notch portions; 184 … fourth side panel portions; 184a … second coil fixing holes; 191 … first wall portion; 192 … second wall portion; 193 … third wall portion; 193a … cutout portions; 271 … a first extension portion first portion; 272 … first extension portion second portion; 471 … second extension arrangement first portions; 472 … second extension portion second portion; 541 … first arm portion; 542 … second arm portion; 543 … connection; 544 … first engagement portion; 551 … second joint; l … optical axis; r1 … first axis; r2 … second axis; s … angular position sensor; t1, T2, T3 … gap.

Claims

1. An optical unit with a shake correction function, comprising:

a movable body provided with a camera module;

a fixed body; and

a rotation support mechanism that supports the movable body so as to be rotatable with respect to the fixed body about an optical axis of the camera module,

the movable body includes a first member including a first annular plate portion surrounding the optical axis and overlapping the camera module when viewed from the optical axis direction,

the rotation support mechanism includes:

a second member having a second annular plate portion opposed to the first annular plate portion in the optical axis direction, and connected to the fixed body;

a metal member including a movable body side fixing portion fixed to the first annular plate portion, a fixed body side fixing portion fixed to the second annular plate portion, and a leaf spring portion that connects the movable body side fixing portion and the fixed body side fixing portion and is elastically deformable in a circumferential direction around the optical axis; and

and a radial stopper portion extending from an edge of one of the first annular plate portion and the second annular plate portion in the optical axis direction and radially opposing the other edge of the first annular plate portion and the second annular plate portion.

2. The optical unit with shake correction function according to claim 1, wherein,

an optical axis direction stopper portion is provided, which extends from one of the first member and the second member in the optical axis direction and faces the other of the first member and the second member in the optical axis direction.

3. The optical unit with shake correction function according to claim 2, wherein,

the movable body is provided with a holder for holding the camera module,

the second annular plate portion is disposed in a gap between the first annular plate portion and the camera module in the optical axis direction,

the holder includes a holder protrusion protruding in the optical axis direction, and a gap in the optical axis direction between a distal end surface of the holder protrusion and the second member is narrower than a gap in the optical axis direction between the camera module and the second member.

4. An optical unit with a shake correction function according to claim 3,

a rotation limiting mechanism that limits a rotation range of the movable body around the optical axis;

the rotation limiting mechanism includes:

A first rotation restriction portion extending from an outer peripheral edge of one of the first annular plate portion and the second annular plate portion to an outer peripheral side; and

a second rotation restriction portion extending from an outer peripheral edge of the other of the first annular plate portion and the second annular plate portion in the optical axis direction,

one of the first rotation restriction portion and the second rotation restriction portion is disposed on both sides in the circumferential direction of the other of the first rotation restriction portion and the second rotation restriction portion.

5. The optical unit with shake correction function according to claim 4, wherein,

the plate spring part is provided with a first plate spring part with a plate thickness direction facing the circumferential direction,

the first leaf spring portion includes:

a first arm portion extending in a radial direction about the optical axis;

a second arm portion extending in the radial direction at a position adjacent to the first arm portion in the optical axis direction; and

and a connecting portion that connects the first arm portion and the second arm portion in a shape folded back in the radial direction.

6. The optical unit with shake correction function according to claim 5, wherein,

The plate spring part is provided with a second plate spring part with a plate thickness direction facing the radial direction,

the second plate spring portion connects the movable body side fixing portion to the first plate spring portion, or connects the fixed body side fixing portion to the first plate spring portion.

7. The optical unit with shake correction function according to claim 6, wherein,

the metal member has:

a first metal member including the annular fixed body side fixing portion and the first plate spring portion bent in the optical axis direction from an edge of a first cutout portion provided in the fixed body side fixing portion and extending in the radial direction; and

a second metal member including the annular movable body side fixed portion and the second plate spring portion bent in the optical axis direction from an edge of a second cutout portion provided in the movable body side fixed portion and extending in a circumferential direction around the optical axis,

the tip of the second leaf spring portion is engaged with the first leaf spring portion.

8. The optical unit with a shake correction function according to any one of claims 5 to 7,

at least three leaf spring portions are provided so as to be distributed in the circumferential direction,

The three plate spring portions are arranged at positions overlapping the camera module when viewed from the optical axis direction.

9. The optical unit with shake correction function according to claim 8, wherein,

comprises a gimbal mechanism which supports the rotation support mechanism rotatably about a first axis intersecting the optical axis and supports the rotation support mechanism rotatably about a second axis intersecting the optical axis and the first axis,

the second member is supported by the gimbal mechanism to be rotatable about the first axis,

the fixed body supports the movable body via the rotation support mechanism and the gimbal mechanism.

10. The optical unit with shake correction function according to claim 9, wherein,

the second member includes: a pair of second extending portions protruding from the second annular plate portion to both sides in the first axial direction; and a pair of second protruding plate portions protruding from the second annular plate portion to both sides in the second axial direction, the pair of second extending portions being connected to the gimbal mechanism,

the first member includes four first protruding plate portions protruding from the first annular plate portion to both sides in the first axial direction and both sides in the second axial direction,

The optical axis direction stopper portion extends in the optical axis direction from the circumferential edge of the first protruding plate portion and is opposed to the second protruding plate portion or the second extension portion in the optical axis direction.

11. The optical unit with shake correction function according to claim 10, wherein,

four first leaf spring portions are provided so as to be distributed in the circumferential direction,

slits extending in the radial direction and opening at the inner peripheral edge of the second annular plate portion are provided in the pair of second extending portions and the pair of second projecting plate portions, respectively,

the optical axis direction stopper portion extends in the optical axis direction from edges of both sides of the first protruding plate portion in the circumferential direction, and surrounds both sides of the first plate spring portion arranged in the circumferential direction of the slit.

12. The optical unit with shake correction function according to claim 10 or 11, characterized in that,

the retainer convex portions are provided at corner portions on both sides in the second axial direction and corner portions on both sides in the first axial direction,

the retainer projections provided at the corner portions on both sides of the second axis direction are opposed to the second projecting plate portion in the optical axis direction,

The retainer convex portions provided at the corner portions on both sides of the first axis direction are opposed to the second extension portion in the optical axis direction.