CN115145089A - Optical unit with shake correction function - Google Patents

Abstract

An optical unit with a shake correction function includes a rotation support mechanism for supporting a movable body by a plate spring, and prevents damage to a plate spring portion for supporting the movable body so as to be rotatable around an optical axis. The optical unit with a shake correction function has a rotation support mechanism (12) for supporting a 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 opposite 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 facing the edge of the first annular plate portion in the radial direction is provided on the edge of the second annular plate portion. Further, the optical axis direction stopper portion extending in the-Z direction from the circumferential edge of the first projecting plate portion projecting from the first annular plate portion to the outer circumferential side is opposed to the second projecting plate portion or the second extending portion projecting from the first annular plate portion to the outer circumferential side in the Z axis direction (optical axis direction).

Description

Optical unit with shake correction function

Technical Field

The present invention relates to an optical unit with a shake correction function for correcting shake by rotating a camera module about an optical axis.

Background

In an optical unit mounted on a portable terminal or a moving body, in order to suppress disturbance of a photographed image when the portable terminal or the moving body moves, a moving body including a camera module is rotated 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 such an optical unit with a shake correction function.

The optical unit with shake correction function of patent document 1 includes: a fixed body; and a movable body supported to be rotatable about an optical axis with respect to the fixed body. The movable body is provided with: a camera module provided with a lens; a support body surrounding the periphery of the camera module; and a gimbal mechanism that supports the camera module so as to be rotatable about the first axis and the second axis inside the support body. The optical unit with a shake correction function has a rotation support mechanism for supporting the movable body so as to be rotatable about the optical axis. The rotation support mechanism includes: a convex portion protruding from a bottom portion of the movable body to a rear side in the optical axis direction; and a ball bearing surrounding the convex portion.

The present inventors have applied to an optical unit with a shake correction function in japanese patent application No. 2020-36404, in which a gimbal mechanism is provided outside a movable body, and a rotation support mechanism is provided between the gimbal mechanism and the movable body. The rotation support mechanism of Japanese patent application No. 2020-36404 adopts the following structure: a ball bearing having rolling elements inserted between two annular rail members facing each other in the optical axis direction is disposed so as to surround a lens barrel section 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 supported by a gimbal mechanism so as to be rotatable about a first axis.

The rotation support mechanism of japanese patent application No. 2020-36404 can reduce the height of the optical axis direction of the optical unit with a 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 the outer shape of the optical unit with the shake correction function can be reduced.

Documents of the prior art

Patent document

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

Disclosure of Invention

However, the rotation support mechanism of japanese patent application No. 2020-36404 is configured by using two rail members, a cage, and a plurality of rolling elements, and is a complicated structure using a plurality of magnets constituting a pressing mechanism, and therefore, the member cost is high and the assembly work is complicated.

Therefore, if a structure in which the rolling elements and the cage are connected by a leaf spring that elastically deforms around the optical axis is employed instead of assembling the bearing by arranging the rolling elements and the cage between the annular members facing each other in the optical axis direction, a pressing mechanism is not necessary, and the assembling work is easy. However, in the connection using the leaf spring, when an impact or the like is applied, the leaf spring may be deformed into an unintended shape, and the annular member may be displaced in the radial direction. In addition, if the pressing mechanism is eliminated, the two annular members may be largely separated or brought close to each other in the optical axis direction. Therefore, the plate spring may be damaged.

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

In order to solve the above problem, 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 around an optical axis of the camera module, the movable body including a first member having a first annular plate portion that surrounds the optical axis and overlaps with 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 plate 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 in the optical axis direction from an edge of one of the first annular plate portion and the second annular plate portion and radially opposing an edge of the other of the first annular plate portion and the second annular plate portion.

According to the present invention, a rotation support mechanism for connecting a movable body and a fixed body includes: a second annular plate portion opposed to the first annular plate portion provided on the movable body in the optical axis direction; and a plate 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 so as to be rotatable about the optical axis. Further, since the movable body can be returned to the original position by the elastic force of the plate spring portion, a magnetic spring for returning to the original position is not required. Therefore, the structure of the rotation support mechanism can be simplified. Further, since the radial stopper portion is provided which extends in the optical axis direction from the edge of one of the first annular plate portion and the second annular plate portion and which faces the edge of the other 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 restricted from relatively moving largely in the radial direction. Therefore, the plate spring portion that supports the movable body so as to be rotatable about the optical axis can be prevented from being damaged.

In the present invention, it is preferable that an optical axis direction stopper portion extending in the optical axis direction from one of the first member and the second member and facing the other of the first member and the second member in the optical axis direction be provided. Thus, the first annular plate portion and the second annular plate portion can be restricted from approaching in the optical axis direction. Therefore, the plate spring portion that supports the movable body so as to be rotatable about the optical axis can be prevented from being damaged.

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 projection portion projecting in the optical axis direction, and a gap between a tip end surface of the holder projection 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 largely separated in the optical axis direction. Therefore, the plate spring portion that supports the movable body so as to be rotatable about the optical axis can be prevented from being damaged.

In the present invention, it is preferable that the optical axis adjusting device further includes a rotation restricting mechanism for restricting a rotation range of the movable body around the optical axis, the rotation restricting mechanism including: a first rotation restricting 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 restricting portion extending in the optical axis direction from an outer peripheral edge of the other of the first annular plate portion and the second annular plate portion, one of the first rotation restricting portion and the second rotation restricting portion being disposed on both sides of the other of the first rotation restricting portion and the second rotation restricting portion in the circumferential direction. In this way, the rotation restricting mechanism can be configured to be opposed to each other in the circumferential direction between the first annular plate portion and the second annular plate portion. Therefore, the range of rotation of the movable body can be restricted. In addition, since the arrangement of the first rotation restricting portion and the second rotation restricting 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 directed 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. In this way, since the first plate spring portion is long in the radial direction, the spring constant when elastically deformed in the circumferential direction is small. Therefore, the driving force required to rotate the movable body about the optical axis can be reduced, and the magnetic driving mechanism for the roll correction can be downsized. Further, since the first plate spring portion is less likely to be deformed 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 thus the component cost can be reduced, and the assembly operation 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 directed in the radial direction, and the second plate spring portion connects the movable body side fixing portion and the first plate spring portion, or connects the fixed body side fixing 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 is elastically deformed to alleviate the impact applied in the radial direction to the first plate spring portion. Therefore, plastic deformation of the first plate spring portion can be suppressed, and impact resistance can be improved.

In the present invention, it is preferable that the metal member has: a first metal member having the ring-shaped fixed body-side fixing portion and the first plate spring portion that is bent in the optical axis direction from an edge of a first cutout portion provided in the fixed body-side fixing portion and extends in the radial direction; and a second metal member having an annular movable body side fixing portion and a second plate spring portion that is bent in the optical axis direction from an edge of a second cutout portion provided in the movable body side fixing portion and extends in a circumferential direction around the optical axis, a front end of the second plate spring portion being engaged with the first plate spring portion. In this way, by joining the metal member having the plate spring portion in two parts, it is possible to integrate a part of the plurality of plate spring portions with the fixed body-side fixing portion or the movable body-side fixing portion in each of the parts. Therefore, the number of parts can be reduced, and the assembly of the rotation support mechanism is easy. In addition, the positional accuracy of each spring portion can be improved.

In the present invention, it is preferable that at least three plate spring portions are provided so as to be distributed in the circumferential direction, and the three plate spring portions are arranged at positions overlapping with 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 in at least three locations, and therefore the movable body can be supported in a well-balanced manner. Further, since the plate spring portion overlaps the camera module when viewed from the optical axis direction, the outer shape of the optical unit with a shake correction function when viewed from the optical axis direction can be reduced.

In the present invention, it is preferable that a gimbal mechanism is provided to support the rotation support mechanism so as to be rotatable about a first axis intersecting the optical axis and to support the rotation support mechanism so as to be rotatable about a second axis intersecting the optical axis and the first axis, the second member is supported by the gimbal mechanism so as to be rotatable about the first axis, and the fixed body supports the movable body via the rotation support mechanism and the gimbal mechanism. In this way, since the unit that rotates around the optical axis does not include a gimbal mechanism, 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, it is preferable that 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 axis 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 axis direction and both sides in the second axis direction, and the optical axis direction stopper portion extends from the circumferential edge of the first protruding plate portion in the optical axis direction so as to be opposed to 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 arranged uniformly in the circumferential direction, the first annular plate portion and the second annular plate portion can be restricted from coming close to each other largely in the optical axis direction. Therefore, a decrease in the positional accuracy of the movable body can be suppressed. Further, since the stopper portion can be configured by a shape for connection with the gimbal mechanism (second extending portion), complication of the member shape of the second member can be avoided.

In the present invention, it is preferable that four first plate spring portions are provided so as to be dispersed in the circumferential direction, slits extending in the radial direction and opening at an inner peripheral edge of the second annular plate portion are provided in each of the pair of second extending portions and the pair of second protruding plate portions, and the optical axis direction stopper portion extends in the optical axis direction from edges on both sides of the first protruding plate portion in the circumferential direction and surrounds both sides of the first plate spring portion disposed in the slits in the circumferential direction. 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 disposed 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 holder projection is provided at a corner portion on both sides in the second axial direction and a corner portion on both sides in the first axial direction, the holder projection provided at the corner portion on both sides in the second axial direction is opposed to the second protruding plate portion in the optical axis direction, and the holder projection provided at the corner portion on both sides in the first axial direction is opposed to 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 extension portion) for connection to the gimbal mechanism, the member shape of the second member can be prevented from being complicated. Further, since the stopper mechanisms in the four optical axis directions are arranged uniformly 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 each other greatly in the optical axis direction, and a decrease in the positional accuracy of the movable body can be suppressed.

(effect of the invention)

According to the present invention, a rotation support mechanism for connecting a movable body and a fixed body includes: a second annular plate portion opposed to the first annular plate portion provided on the movable body in the optical axis direction; and a plate 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 temperature of the molten metal is controlled, the movable body can be supported so as to be rotatable about the optical axis. Further, since the movable body can be returned to the original position by the elastic force of the plate spring portion, a magnetic spring for returning to the original position is not required. Therefore, the structure of the rotation support mechanism can be simplified. Further, since the radial stopper portion is provided which extends in the optical axis direction from the edge of one of the first annular plate portion and the second annular plate portion and is opposed to the edge of the other 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 restricted from relatively moving largely in the radial direction. Therefore, the plate spring portion that supports the movable body so as to be rotatable about the optical axis can be prevented from being damaged.

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 shake correction function with the cover removed, as viewed from the object side.

Fig. 4 isbase:Sub>A cross-sectional view of the optical unit with the shake correcting function cut atbase:Sub>A-base:Sub>A position of fig. 3.

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

Fig. 6 is a perspective view of the movable body and the rotation support mechanism as viewed 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 rotation 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.

(Overall 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 shake correction function of fig. 1. Fig. 3 is a plan view of the optical unit with shake correction function with the cover removed, as viewed from the object side.

As shown in fig. 1, the optical unit 1 with the 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 fixed body 11 includes: a frame-shaped casing 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 opposite side to the object and covering the movable body from the opposite side to the object. The optical unit 1 with shake correction function includes a flexible printed circuit board 6 drawn out from the movable body 10 and a flexible printed circuit board 7 drawn around the outer peripheral surface of the housing 3.

The optical unit 1 with a shake correction function is used for optical apparatuses such as a camera-equipped mobile phone and a drive recorder, and an operation camera and a wearable camera mounted on a mobile body such as a helmet, a bicycle, and a radio-controlled helicopter. In such an optical apparatus, if a shake of the optical apparatus occurs during photographing, a captured image is disturbed. In order to prevent the captured image from tilting, 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 a detection unit such as a gyroscope.

The camera module 2 includes a lens 2a and an image pickup device 2b (see fig. 4 and 5) disposed on an optical axis L of the lens 2a. The optical unit 1 with a shake correction function performs shake correction by rotating the camera module 2 around the optical axis L of the lens 2a, a first axis R1 orthogonal to the optical axis L, and a second axis R2 orthogonal to the optical axis L and the first axis R1.

In the following description, three axes orthogonal to each other are referred to 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 object, and the + Z direction is the object side of the camera module 2. The first axis R1 and the second axis R2 are inclined at 45 degrees about the Z axis (optical axis) with respect to the X axis and the Y axis.

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

As shown in fig. 3, the gimbal mechanism 13 includes a gimbal frame 14 and a first connecting mechanism 15 that connects the gimbal frame 14 and the rotation support mechanism 12 to each other so as to be rotatable about a first axis R1. The first linkages 15 are provided on both sides of the gimbal frame 14 in the first axis R1 direction. The gimbal mechanism 13 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 direction of the second axis R2.

The optical unit 1 with shake correction function further includes a shake correction magnetic drive mechanism 20 for rotating the movable body 10 about the first axis R1 and the second axis R2. As shown in fig. 3, the magnetic drive mechanism 20 for blur correction includes: a first magnetic drive mechanism 21 for correcting shake, which generates a driving force about the X axis to the movable body 10; and a second magnetic drive mechanism 22 for correcting shake, which generates a driving force about the Y axis to the movable body 10. The first magnetic drive mechanism 21 for shake correction and the second magnetic drive mechanism 22 for shake correction are arranged in the circumferential direction around the Z axis. In this example, the first magnetic drive mechanism 21 for blur correction is arranged in the-Y direction of the camera module 2. The second magnetic drive mechanism for shake correction 22 is disposed in the-X direction of the camera module 2.

The movable body 10 rotates around the X axis and around the Y axis by combining the rotation around the first axis R1 and the rotation around 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 shake correction function further includes a rolling correction magnetic drive mechanism 23 for rotating 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 roll correction magnetic drive mechanism 23 are arranged in the circumferential direction around the Z axis. In this example, the roll correction magnetic drive mechanism 23 is disposed in the + Y direction of the camera module 2. The rolling correction magnetic drive mechanism 23 is located on the opposite side of the first shake correction magnetic drive mechanism 21 with the optical axis L therebetween.

(fixed body)

In the fixed body 11, the cover 4 and the base 5 are plate-shaped and made of a nonmagnetic metal. As shown in fig. 2, hooks 8 bent at a substantially right angle toward the housing 3 are formed on the outer peripheral edges of the cover 4 and the base 5. The housing 3 is made of resin. The hook 8 is engaged with a projection 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 from the cover 4 in the + Z direction.

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 section 19 disposed in the + X direction of the frame section 18. The frame portion 18 includes: a first side plate portion 181 and a second side plate portion 182 opposed in the Y-axis direction; and a third side plate 183 and a fourth side plate 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 section 183 is located in the + X direction of the fourth side plate section 184.

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

The wiring housing section 19 includes: a first wall 191 and a second wall 192 facing each other in the Y axis direction; and a third wall portion 193 opposed to the third side plate portion 183 of the frame portion 18 in the X-axis direction. The wiring housing section 19 includes a notch 193a formed by cutting an edge of the third wall section 193 in the-Z direction. As shown in fig. 3, the flexible printed circuit board 6 is routed inside the wiring housing 19 in the direction of the inner surfaces of the third side plate 183, the first wall 191, and the third wall 193, and is drawn out to the outside of the wiring housing 19 through the notch 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 to the first coil fixing hole 181a. A second coil fixing hole 184a is provided at the fourth side plate portion 184 of the case 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 air-core coils that are long and 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 constitute a first magnetic drive mechanism 21 for correcting shake. 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 magnetic drive mechanism 22 for shake correction. The third coil 23C fixed to the second side plate portion 182 and the third magnet 23M fixed to the + Y direction side surface of the movable body 10 face each other in the Y direction, and constitute a rolling correction magnetic drive mechanism 23.

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 circuit board 7 is wound along the outer peripheral surfaces of the first side plate portion 181, the fourth side plate portion 184, and the second side plate portion 182 of the frame portion 18 in this order. Although not shown in fig. 1 and 2, the flexible printed board 7 extends from the second side plate portion 182 to the side surface of the wiring housing section 19, and is connected to a power supply board (not shown) fixed to the wiring housing section 19.

In the flexible printed circuit board 7, the magnetic plate 17 is fixed to both 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 rotational direction around the X axis. In addition, the magnetic plate 17 and the second magnet 22M overlapping the second coil 22C constitute a magnetic spring for returning the movable body 10 to the reference angular position in the rotational direction about the Y axis. An angular position sensor S is disposed at the center of each coil on the flexible printed circuit board 7. The optical unit 1 with shake correction function acquires the angular position of the movable body 10 in the rotational direction around the X axis, around the Y axis, and around the Z axis, based on the output of the angular position sensor S.

(gimbal mechanism)

Fig. 4 and 5 are sectional views of the optical unit 1 with the shake correction function. Fig. 4 isbase:Sub>A sectional view taken atbase:Sub>A positionbase:Sub>A-base:Sub>A of fig. 3, and fig. 5 isbase:Sub>A sectional view taken atbase:Sub>A position B-B of fig. 3. As shown in fig. 3 and 5, second connection mechanisms 16 are provided at diagonal positions in the second axis R2 direction of the frame portion 18, 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 member 162 is fixed to each of 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 ball 163 and a second thrust support member 164 that fixes the ball 163. By fixing the second gimbal frame support member 162 to the recess 161, the position of the ball 163 on the second axis R2 is supported by the fixed body 11. When the gimbal mechanism 13 is assembled, 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 spherical body 163 on the second axis R2. Thereby, the second connecting mechanism 16 is constituted.

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

The gimbal frame 14 is formed of a metal plate spring. 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 axial side extension portions 141 protruding from the gimbal main body portion 140 to both sides in the first axis R1 direction and extending in the-Z direction; and a pair of second axis side extension portions 142 that protrude from the gimbal main body portion 140 toward both sides in the second axis R2 direction and extend in the-Z direction. The gimbal frame 14 has an opening 143 that penetrates the center of the gimbal body 140 in the Z-axis direction.

As shown in fig. 2 and 4, each of the pair of first shaft-side extension portions 141 includes a first shaft-side concave curved surface 144 that is concave toward the movable body 10 side in the first shaft R1. The first axially extending portion 141 has a protruding portion 146 protruding in the-Z direction of the first axially concave curved surface 144 in a direction toward the outer peripheral side. Next, the pair of second shaft side extension portions 142 each include a second shaft side concave curved surface 147 that is concave toward the movable body 10 side in the second shaft R2 direction toward the inner peripheral side. Further, the second axis-side concave curved surface 147 includes a pair of notches 148 formed by cutting out side edges on both sides in the circumferential direction in the + Z direction.

The first thrust support member 153 includes: a plate portion 154 extending in the Z-axis direction; a pair of arm portions 155 that are bent from the side edges on both sides of the plate portion 154 in the circumferential direction toward the movable body 10; and a pair of arm portions 156 (see fig. 4 and 6) that are bent in the-Z direction of the pair of arm portions 155 from the side edges on both sides in the circumferential direction of the plate portion 154 toward the movable body 10. The ball 152 is fixed to the plate portion 154 by welding. As will be described later, the rotation support mechanism 12 includes a pair of second extending portions 47 extending in the-Z direction on both sides of the movable body 10 in the first axis R1 direction, and the distal ends of the arm portions 155 and 156 of the first gimbal frame support member 151 are fixed to the distal end portions of the second extending portions 47 by welding. The distal end portion of the second extension portion 47 has a pair of protrusions 157 bent from the side edges on both sides in the circumferential direction toward the outer circumferential side, and the protrusions 157 are fitted between the arm portions 155, 156.

When the gimbal mechanism 13 is assembled, the first axial side extension 141 of the gimbal frame 14 is bent toward the inner peripheral side and inserted into the inner peripheral side of the first gimbal frame support member 151. Thus, the first axial side extension portions 141 are biased toward the outer peripheral side, and therefore the first axial side concave curved surface 144 of each first axial side extension portion 141 and the spherical body 152 of the first gimbal frame support member 151 can maintain a state of contact. The protruding portion 146 provided at the tip of the first axial side extension 141 protrudes outward in the radial direction from the-Z direction side of the plate portion 154 (see fig. 4). This can prevent the gimbal frame 14 from falling off from the first gimbal frame support member 151 in the + Z direction.

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

When the gimbal mechanism 13 is assembled, the second shaft side extension 142 of the gimbal frame 14 is bent toward the inner peripheral side and inserted into the inner peripheral side of the second gimbal frame support member 162. Accordingly, the second shaft-side extension portions 142 are biased toward the outer peripheral side, and therefore the second shaft-side concave curved surfaces 147 of the second shaft-side extension portions 142 and the spherical bodies 163 of the second gimbal frame support member 162 can maintain a state of contact. Further, the arm portion 167 of the second thrust support member 164 is fitted into the notch 148 of the second shaft-side extension 142. This can prevent the gimbal frame 14 from falling off from 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 viewed 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 that surrounds the optical axis L and overlaps the outer peripheral portion of the camera module 2 from the + Z direction; and a first extension portion 27 that protrudes from the first annular plate portion 26 toward the outer peripheral side, is bent in the-Z direction on the outer peripheral side of the camera module 2, and is 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 projecting plate portions 28 project from the first annular plate portion 26 in four directions, i.e., both sides in the first axis R1 direction and both sides in the second axis R2 direction.

The first extension portions 27 are disposed in three positions of the first annular plate portion 26, namely, the-X direction, + Y direction, and the-Y direction. The angular position at which the first extension portion 27 is disposed is the angular position at which the first magnet 21M and the second magnet 22M of the shake correction magnetic drive mechanism 20 and the third magnet 23M of the roll correction magnetic drive mechanism 23 are disposed. The first extension portion 27 includes: a first extension 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-Z direction front end of the first extension portion first portion 271, and having a circumferential width wider than the first extension portion first portion 271. The first extension second portion 272 is secured to the cage 24.

As shown in fig. 4 and 5, the camera module 2 includes a camera module main body 30A and a camera module cylindrical portion 30B protruding in the + Z direction from the center of the camera module main body 30A. The lens 2a is housed in the camera module cylindrical portion 30B. The holder 24 surrounds the camera module main body 30A from the outer peripheral side. The camera module cylindrical portion 30B protrudes in the + Z direction from a circular hole 26a (see 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 camera module main body 30A and the holder 24 have a generally octagonal outline shape when viewed from the + Z direction. The holder 24 includes: a first side wall 31 and a second side wall 32 extending parallel to the X direction; and a third sidewall 33 and a fourth sidewall 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 sidewall 33 is located in the + X direction of the fourth sidewall 34. A notch 33a is provided at an end edge of the third side wall 33 in the-Z direction, and the flexible printed board 6 drawn out from the end of the camera module 2 in the-Z direction in the + X direction passes through the notch 33 a.

Further, the retainer 24 includes: a fifth side wall 35 and a sixth side wall 36 located diagonally in the direction of the first axis R1; and a seventh side wall 37 and an eighth side wall 38 located diagonally in the direction of the second axis R2. The fifth side wall 35 is located in the-X direction of the sixth side wall 36. The seventh side wall 37 is located in the-X direction of the eighth side wall 38. As shown in fig. 6, on the end surfaces in the + Z direction of the fifth side wall 35, the sixth side wall 36, the seventh side wall 37, and the eighth side wall 38, there are formed retainer convex portions 39 protruding in the + Z direction.

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 so that the same poles face in the Z-axis direction. A third magnet 23M is fixed to the fourth side wall 34 of the holder 24. The third magnet 23M is 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 optical axis L from the first magnet 21M.

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

The three recesses 40 are each formed with a groove portion 42 on the inner surface on both sides in the circumferential direction. As shown in fig. 7, the first extension portion second portion 272 provided at the-Z direction front end of the first extension portion 27 is inserted into each concave portion 40. Both ends of the first extension portion second portion 272 in the circumferential direction are inserted into the groove portions 42 and fixed to the respective recesses 40 by an adhesive. The first extension portion second portion 272 is inserted radially inward 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 therefore 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; fixed to the second annular plate portion 46 an annular fixed body-side fixed portion 52; and a plate spring portion 53 connecting the movable body side fixing portion 51 and the fixed body side fixing portion 52. The plate 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 about 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 projecting plate portions 48 projecting from the second annular plate portion 46 toward both sides in the second axis R2 direction. The first axial side extension 141 of the gimbal frame 14 is connected to the pair of second extensions 47 so as to be rotatable about the first axis R1 (see fig. 4). Therefore, the second member 45 is supported by the gimbal mechanism 13 so as to be rotatable about the first axis R1.

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

(Metal parts)

As shown in fig. 9, the metal member 50 is assembled from two members, 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 have different plate thicknesses, and the plate thickness of the first metal member 56 is smaller than that of 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 the spring constant of the second plate spring portion 55 provided on the second metal member 57.

(first Metal Member)

The first metal member 56 includes: an annular fixed body-side fixed portion 52; and a first plate spring portion 54 connected to an edge of a first notch portion 58 formed by cutting out the outer peripheral edge of the fixed body-side fixing portion 52. The first notch 58 has a first edge 59 extending in the radial direction of the fixed body-side fixing portion 52, and the first plate spring 54 is bent substantially at right angles from the first edge 59, is bent in the plate thickness direction toward the circumferential direction of the fixed body-side fixing portion 52, and extends radially outward of the fixed body-side fixing portion 52. When the fixed body-side fixing portion 52 is fixed to the second annular plate portion 46, the first 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 extends radially outward around the optical axis L while facing the circumferential direction around the optical axis. Therefore, the first plate spring portion 54 is elastically deformed in the circumferential direction around the optical axis L.

Four first notch portions 58 are provided at intervals in the circumferential direction on the outer peripheral edge of the fixed body-side fixing portion 52, and the first plate spring portion 54 extends radially outward from the first edge portion 59 of each first notch portion 58. Here, the second member 45 as 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 locations. The second slit 49 extends radially at the circumferential center of each of the pair of second extending portions 47 and the pair of second protruding 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 with the optical axis L as the center.

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 portion 52 are not aligned in the same direction. Specifically, in two circumferentially adjacent 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 portion 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 portions 54 are circumferentially opposite in two circumferentially adjacent first cutout portions 58. Therefore, one of the circumferentially adjacent first plate spring portions 54 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 circumferentially adjacent first plate spring portions 54 is bent in the + Z direction from the edge (first edge portion 59) on the other side in the circumferential direction of the first cutout portion 58.

In the case where 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 deviation 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 positionally deviated in the circumferential direction. As a result, there is a problem that the rotational position (initial position) of the movable body 10 when no current is supplied is shifted. However, in the present embodiment, since the bending directions of the circumferentially adjacent first plate spring portions 54 are opposite in the circumferential direction, even if there is an error in the bending angle, it is possible to avoid a positional shift in the circumferential direction of the first member 25 and the second member 45, and a rotational position (initial position) shift of the movable body 10 when no current is applied.

The first plate spring portion 54 has: a first arm portion 541 and a second arm portion 542 extending in the radial direction with the optical axis L as a center; 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 in the same plane. The first arm 541 and the second arm 542 extend in the radial direction at positions adjacent to each other in the optical axis direction, and the connecting portion 543 connects radially outer end portions of the first arm 541 and the second arm 542 in a shape folded back 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 joint portion 544 to be joined to the second plate spring portion 55 by welding or the like is provided at the radially inner end portion of the second arm portion 542.

As shown in fig. 4 and 5, the radial center portion of the first plate spring portion 54 is bent in the-Z direction and is accommodated 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 positioned radially outward of the tip end of the second slit 49 in the + Z direction of the second extension portion first portion 471 or the second protruding plate portion 48. The first projecting plate portion 28 disposed in the + Z direction of the first plate spring portion 54 has a shorter radial length than the first plate spring portion 54, and therefore the tip end portion of the first plate spring portion 54 does not interfere with the first projecting plate portion 28. With this configuration, while 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 as viewed in the optical axis direction is reduced, so that the rotation support mechanism 12 can be made compact.

(second Metal Member)

The second metal member 57 includes: an annular movable body side fixed portion 51; and a second plate spring portion 55 connected to an edge of a second notch portion 60 formed by cutting out an inner peripheral edge of the movable body side fixing portion 51. The second notch portion 60 includes a second edge portion 61 intersecting with the radial direction of the movable body side fixing portion 51, and the second plate spring portion 55 is bent at substantially right angles from the second edge portion 61 and extends in the circumferential direction of the movable body side fixing portion 51 in a plane intersecting with the radial direction in a state where the plate thickness direction is directed to the radial direction of the movable body side fixing portion 51. When the movable body side fixing portion 51 is fixed to the surface of the first annular plate portion 26 in the + Z direction, the second 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 with the plate thickness direction facing the radial direction centered on the optical axis. Therefore, the second plate spring portion 55 is elastically deformed in the radial direction around the optical axis L.

Four second notch portions 60 are provided at circumferentially spaced intervals on the inner peripheral edge of the movable body side fixing portion 51. Further, the third notch portions 62 are provided at four locations, and the third notch portions 62 are formed by cutting out the locations adjacent to the second edge portions 61 of the second notch portions 60 in the circumferential direction so as to be large toward the outer circumferential side. Further, at four locations, on the outer peripheral edge of the movable body side fixing portion 51, protruding portions 63 are provided which protrude radially outward from the outer peripheral side of each third notched portion 62. A rectangular second engaging portion 551 bent at a substantially right angle to the radially outer side is provided at the tip of the second plate spring portion 55. The second engaging portion 551 and the first engaging portion 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. Since the second plate spring portion 55 is bent at a substantially right angle from the second edge portion 61 and then extends in the circumferential direction toward the third cutout portion 62, 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 fixing portion 51.

Here, the first member 25 as the counterpart member to which the movable body side fixing portion 51 is fixed 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 slits 29 extend in the radial direction at the circumferential center of the first projecting plate portion 28 projecting in four directions, i.e., from the first annular plate portion 26 to both sides in the first axis R1 direction and to both sides in the second axis R2 direction. Therefore, four first slits 29 extending radially are provided in the first member 25 at four locations on both sides in the first axis R1 direction and on both sides in the second axis R2 direction. The four first slits 29 overlap with the second slits 49 provided in the second member 45, respectively, as viewed from the optical axis direction. The first member 25 is provided with notch portions 69 formed by cutting out portions adjacent to the first slits 29 in the circumferential direction at four locations. The notch 69 is provided at a position overlapping the third notch 62 of the movable body side fixing portion 51. The second metal member 57 is positioned and fixed to the first annular plate portion 26 such that the four second plate spring portions 55 are disposed in the notch portion 69, and the second joint portion 551 provided at the tip end of the second plate spring portion 55 is disposed at 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 four portions of the second plate spring portion 55 are not aligned in the same direction with respect to the bending direction of the metal plate at the portion connected to the movable body side fixing portion 51. Specifically, in the second plate spring portions 55 at two circumferentially adjacent locations, the metal plates at the locations bent in the-Z direction from the movable body side fixing portion 51 are bent in opposite directions. As shown in fig. 9, in the present embodiment, in the second notch portions 60 at two circumferentially adjacent locations, the positions of the second edge portions 61 connected to the second plate spring portions 55 are circumferentially opposite. 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 cutout 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 cutout portion 60.

In the case where the bending directions of the second plate spring portions 55 are aligned in the same direction, if there is an error in the bending angle of the second plate spring portions 55 when the second metal member 57 is manufactured, a positional deviation 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 positionally deviated in the circumferential direction. As a result, there is a problem that the rotational position (initial position) of the movable body 10 when no current is supplied is shifted. However, in the present embodiment, since the bending directions of the circumferentially adjacent second plate spring portions 55 are opposite in the circumferential direction, even if there is an error in the bending angle, it is possible to avoid a positional shift in the circumferential direction of the first member 25 and the second member 45, and a rotational position (initial position) shift of the movable body 10 when no current is applied.

(radial stop mechanism)

The rotation support mechanism 12 includes a radial stopper portion 64 that extends to the outer peripheral side of the first annular plate portion 26 while being bent in the + Z direction from the outer peripheral edge of the second annular plate portion 46. The radial stopper 64 collides with the outer peripheral edge of the second annular plate 46, thereby restricting the radial positional displacement between 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 26 is set to 0.1mm (see fig. 7).

As shown in fig. 7 and 9, the radial stopper portions 64 are disposed at one position between the circumferentially adjacent first extending portions 27 and second extending portions 47 and at one position between the circumferentially adjacent first extending portions 27 and second protruding plate portions 48, respectively. The radial stopper portions 64 are disposed at one position between a first rotation restricting portion 71 and a second extending portion 47, and at one position between the first rotation restricting portion 71 and a second protruding plate portion 48, respectively. Therefore, the radial stoppers 64 are arranged at eight locations. The eight radial stoppers 64 are arranged substantially equally around the optical axis.

(stop mechanism in the optical axis direction)

The rotation support mechanism 12 includes, as a stopper mechanism for limiting the + Z direction movement range of the second member 45, an optical axis direction stopper 65 provided on the first member 25, and an extending portion 66 provided on the second member 45 and facing 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 while being bent at substantially right angles from the circumferential edge of the first protruding plate portion 28. The extending portion 66 is provided at an end in the circumferential direction of the second extending portion first portion 471 and an end in the circumferential direction of the second protruding plate portion 48. The optical axis direction stopper 65 collides with the extending portion 66, and thereby the + Z direction movement range of the second member 45 with respect to the first member 25 is restricted. In the present embodiment, the Z-axis direction gap T2 between the optical axis direction stopper 65 and the extending portion 66 is set to 0.1mm (see fig. 8).

In the present embodiment, a pair of optical axis direction stoppers 65 are provided on the edges of the first protruding plate portions 28 on both sides in the circumferential direction. As shown in fig. 6 and 8, the first projecting plate portion 28 and the pair of optical axis direction stoppers 65 are gate-shaped 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 extending portions 66 are provided at both circumferential ends of the second extension-disposed-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 the radially inner portion where the extension portion 66 is provided is wider in width in the circumferential direction than the radially outer portion where the extension portion 66 is not provided.

The rotation support mechanism 12 is a stopper mechanism for limiting the movement range of the second member 45 in the-Z direction, and includes: retainer projections 39 provided at four positions of the retainer 24, i.e., a diagonal position in the first axis R1 direction and a diagonal position in the second axis R2 direction; and a distal end portion of the second protruding plate portion 48 and a second extension portion first portion 471 provided in the second member 45 and extending to a position facing the holder protrusion 39 in the Z-axis direction.

As shown in fig. 8, the + Z direction distal end of the holder projection 39 protrudes in the + Z direction beyond the + Z direction end face of the camera module main body 30A. Therefore, the clearance in the Z-axis direction between the distal end surface of the holder protrusion 39 and the second protruding plate portion 48 or the first part 471 of the second extension portion is narrower than the clearance in the Z-axis direction between the camera module 2 and the second protruding plate portion 48 or the first part 471 of the second extension portion. Therefore, the holder protrusion 39 collides with the second protruding plate portion 48 or the second extension portion first portion 471, thereby restricting the movement range of the second member 45 in the-Z direction. In the present embodiment, the clearance T3 in the Z-axis direction between the retainer convex portion 39 and the second projecting plate portion 48 is set to 0.1mm (see fig. 8). Similarly, the clearance between the holder protrusion 39 and the first portion 471 of the second extension portion in the Z-axis direction is set to 0.1mm.

(rotation restricting mechanism)

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

The second rotation restricting portion 72 is a protruding portion that is bent from the outer peripheral edge of the second annular plate portion 46 in the + Z direction (optical axis direction) and extends to a position circumferentially opposite the first rotation restricting portion 71. The second rotation restricting portion 72 is provided at one position on 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 formed integrally 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 two second rotation restricting portions 72 surround both sides of the first rotation restricting portion 71 in the circumferential direction. Therefore, the first rotation restricting portion 71 and the second rotation restricting portion 72 collide with each other, thereby restricting the range of rotation of the movable body 10 with respect to the second member 45 about the optical axis L.

(main action and Effect of the present embodiment)

As described above, the optical unit 1 with 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 from the Z-axis direction (optical axis direction). The rotation support mechanism 12 includes: 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 portion 64 extending in the + Z direction from the edge of the second annular plate portion 46 and radially opposed to the 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 the 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 original position by the elastic force of the plate spring portion 53, a magnetic spring for returning to the original position is not required. Therefore, the structure of the rotation support mechanism 12 can be simplified. Further, since the radial stopper 64 is provided so as to extend in the + Z direction from the edge of the second annular plate portion 46 and to oppose the edge of the first annular plate portion 26 in the radial direction, it is possible to restrict the relative movement of the first annular plate portion 26 and the second annular plate portion 46 in the radial direction. Therefore, the plate spring portion 53 supporting the movable body 10 so as to be rotatable about the optical axis can be prevented from being damaged. In addition, a decrease in the positional accuracy of the movable body 10 can be suppressed.

Further, the radial stopper may be provided on the edge of the first annular plate 26. That is, a radial stopper portion extending in the-Z direction from the edge of the first annular plate portion 26 and radially opposing the edge of the first annular plate portion 26 may be provided. The radial stopper may be provided not on the outer periphery of the first annular plate 26 or the second annular plate 46 but on the inner periphery. Even with such a configuration, the first annular plate portion 26 and the second annular plate portion 46 can be restricted from being displaced in the radial direction. Therefore, the plate spring portion 53 can be prevented from being damaged, and the lowering of the 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, the plate spring portion 53 can be prevented from being damaged, and the lowering of the positional accuracy of the movable body 10 can be suppressed.

The optical axis direction stopper may extend in the + Z direction from the second member 45 and face the first member 25 in the Z axis direction (optical axis direction). Even with such a configuration, 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, the plate spring portion 53 can be prevented from being damaged, and the lowering of the positional accuracy of the movable body 10 can be suppressed.

In the present embodiment, the movable body 10 includes the holder 24 that holds 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 holder protrusions 39 protruding in the Z-axis direction (optical axis direction), and a gap between the distal end surfaces of the holder protrusions 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 largely separating in the Z-axis direction (optical axis direction), and thus a decrease in the positional accuracy of the movable body 10 can be suppressed. Further, since the height of the holder projection 39 can be easily changed, the management of the gap in the optical axis direction is easy.

In the present embodiment, the rotation restricting mechanism 70 is provided for restricting the range of rotation of the movable body 10 about the optical axis L, and the rotation restricting mechanism 70 includes: a first rotation restricting 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 restricting portion 71 and the second rotation restricting portion 72 is disposed on both sides of the other of the first rotation restricting portion 71 and the second rotation restricting portion 72 in the circumferential direction. In this way, the rotation restricting mechanism 70 can be constituted between the first annular plate portion 26 and the second annular plate portion 46 so as to be opposed to each other in the circumferential direction. Therefore, the rotation range of the movable body 10 can be restricted. In addition, since the arrangement of the first rotation restricting portion 71 and the second rotation restricting portion 72 can be easily changed, 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 restricting portion 72 surrounding both circumferential sides of the first rotation restricting portion 71, the first rotation restricting portion 71 may surround both circumferential sides of the second rotation restricting portion 72. That is, the rotation restricting mechanism 70 may be configured such that one of the first rotation restricting portion 71 and the second rotation restricting portion 72 surrounds both circumferential sides of the other of the first rotation restricting portion 71 and the second rotation restricting portion 72. The first rotation restricting section 71 may extend in the optical axis direction, and the second rotation restricting section 72 may extend toward the outer peripheral side.

In the present embodiment, the plate spring portion 53 has a first plate spring portion 54 whose plate thickness direction is oriented in the circumferential direction. The first plate spring portion 54 has: a first arm portion 541 extending in a radial direction with the optical axis L as a center; a second arm portion 542 extending in the radial direction at a position adjacent to the first arm portion 541 in the Z-axis direction (optical axis direction); and a connecting portion 543 connecting the first arm portion 541 and the second arm portion 542 in a radially folded-back shape. Thus, the plate spring shape, which is long in the radial direction with the plate thickness direction facing in the circumferential 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 drive mechanism 23 can be downsized. 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 can reduce the component cost and facilitate the assembly work.

In the present embodiment, the plate spring portion 53 includes a second plate spring portion 55 oriented in the radial direction in the plate thickness direction, and the movable body side fixing portion 51 and the first plate spring portion 54 are connected to the second plate spring portion 55. Therefore, when an impact due to dropping or the like is applied, the second plate spring portion 55 is elastically deformed 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 suppress buckling of the first plate spring portion 54 that is long in the radial direction, and therefore, shock resistance can be improved.

Instead of between the movable body side fixing portion 51 and the first plate spring portion 54, a second plate spring portion 55 may be disposed between the fixed body side fixing portion 52 and the first plate spring portion 54, and the fixed body side fixing portion 52 and the first plate spring portion 54 may be connected to the second plate spring portion 55. 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-described embodiment, the second plate spring portion 55 is elastically deformed, whereby the plastic deformation of the first plate spring portion 54 can be suppressed.

In the present embodiment, the metal member 50 includes: 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 from an edge (first edge portion 59) of a first notch portion 58 provided in the fixed body-side fixing portion 52 and extending in the radial direction; and a second metal member 57 having an annular movable body side fixing portion 51 and a second plate spring portion 55 bent in the optical axis direction from an edge (a second edge portion 61) of a second notch portion 60 provided in the movable body side fixing 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 portion 53 into two parts and joining them, among the parts, 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. Therefore, the number of parts can be reduced, and the assembly of the rotation support mechanism 12 is easy. In addition, the positional accuracy of each plate spring portion 53 can be improved.

In the present embodiment, four plate spring portions 53 are provided so as to be dispersed in the circumferential direction, and the four plate spring portions 53 are disposed at positions overlapping the camera module 2 when viewed from the optical axis direction. Therefore, since the four first plate spring portions 54 extending in the radial direction are arranged in a radial shape, the movable body 10 can be supported in a well-balanced manner. Further, 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, and may be disposed at five or more positions. When the plate spring portions 53 are arranged at least three locations, 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 present embodiment includes a gimbal mechanism 13, the gimbal mechanism 13 supports the rotation support mechanism 12 so as to be rotatable about a first axis R1 intersecting the optical axis L, and supports the rotation support mechanism 12 so as to be rotatable about a second axis R2 intersecting the optical axis L and the first axis R1, the second member 45 is supported by the gimbal mechanism 13 so as to be rotatable about the first axis R1, and the fixed body 11 supports the movable body 10 via the rotation support mechanism 12 and the gimbal mechanism 13. In this way, since the unit that rotates around the optical axis does not include the gimbal mechanism 13, it is not necessary to secure a large rotation space. Therefore, the outer shape of the optical unit 1 with a 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 toward both sides in the first axis R1 direction; and a pair of second projecting plate portions 48 projecting from the second annular plate portion 46 to both sides in the second axis R2 direction, the pair of second extending portions 47 being connected to the gimbal mechanism 13, the first member 25 includes four first projecting plate portions 28 projecting from the first annular plate portion 26 to both sides in the first axis R1 direction and both sides in the second axis R2 direction, and the optical axis direction stopper portion 65 extends from an edge in the circumferential direction of the first projecting plate portion 28 in the Z axis direction (optical axis direction) so as to face the second projecting 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 stoppers 65 are arranged uniformly 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, the decrease in the positional accuracy of the movable body 10 can be suppressed. Further, since the stopper portion can be configured by the shape (second extension portion 47) for connection with the gimbal mechanism 13, complication of the member shape of the second member 45 can be avoided.

In the present embodiment, four first plate spring portions 54 arranged in a dispersed manner in the circumferential direction are provided, slits (second slits 49) extending in the radial direction and opening at the inner peripheral edge of the second annular plate portion 46 are provided in each of the pair of second extending portions 47 and the pair of second protruding plate portions 48, and the optical axis direction stoppers 65 extend in the Z axis direction (optical axis direction) from the edges on both sides in the circumferential direction of the first protruding plate portion 28, and surround both sides in the circumferential direction of the first plate spring portions 54 arranged 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 disposed 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 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 portions 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 member shape of the second member 45 can be prevented from being complicated. Further, since the stopper mechanisms at four positions are arranged uniformly 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 the plate spring portion 53 can be prevented from being damaged. In addition, a decrease in the positional accuracy of the movable body 10 can be suppressed.

Reference numerals

1 \ 8230, an optical unit with a shake correction function; 2 \ 8230and camera module; 2a 8230and lens; 2b 8230and an image pickup element; 3 \ 8230and a shell; 4 \ 8230and a cover; 4a 8230and an opening part; 5 \ 8230and a base; 6. 7 \ 8230and flexible printed substrate; 8 \ 8230and hook; 9 \ 8230and protuberance; 10, 8230, a movable body; 11 \ 8230and a fixed body; 12 \ 8230and a rotary supporting mechanism; 13 \ 8230and universal frame mechanism; 14 \ 8230and universal frame; 15 \ 8230a first connecting mechanism; 16 \ 8230and a second connecting mechanism; 17 \ 8230and magnetic plate; 18, 8230in the frame part; 19\8230Thewiring accommodating part; 20\8230amagnetic driving mechanism for shake correction; 21\8230afirst magnetic drive mechanism for shake correction; 21C 8230and a first coil; 21M 8230a first magnet; 22\8230asecond magnetic drive mechanism for shake correction; 22C 8230and a second coil; 22M 8230and a second magnet; 23 \ 8230, magnetic drive mechanism for roll correction; 23C, 8230and a third coil; 23M 8230and a third magnet; 24 \ 8230and a retainer; 25, 8230a first part; 26 \ 8230a first annular plate part; 26a 8230; circular hole; 27 \ 8230and a first extension setting part; 28 \ 8230a first protruding plate portion; 29 \ 8230and slits; 30A 8230and a main body part of the camera module; 30B 8230and a cylindrical part of the camera module; 31 \ 8230and a first side wall; 32 \ 8230and a second side wall; 33 \ 8230and a third side wall; 33a 8230, a gap part; 34 \ 8230and a fourth side wall; 35 \ 8230and a fifth side wall; 36 \ 8230and a sixth side wall; 37 \ 8230and a seventh side wall; 38' \ 8230and an eighth side wall; 39 8230and convex part of retainer; 40 \ 8230and a concave part; 41 8230a bottom surface; 42 \ 8230and a slot part; 45, 8230a second part; 46 \ 8230a second annular plate portion; 47 \ 8230and a second extension setting part; 48, 8230a second protruding plate portion; 49 \ 8230and a second slit; 50 8230a metal component; 51\8230amovable body side fixing part; 52 8230a fixed body side fixed part; 53 \ 8230and a plate spring part; 54 \ 8230and a first plate spring part; 55 \ 8230and a second plate spring part; 56 \ 8230a first metal part; 57\8230asecond metal part; 58 \ 8230and a first gap part; 59 \ 8230and a first edge portion; 60 \ 8230and a second gap part; 61 8230a second edge portion; 62 \ 8230and a third gap part; 64 \ 8230a radial stop; 65 \ 8230and an optical axis direction stopper; 66, 8230a extension part; 69 \ 8230and a gap part; 70 8230a rotation limiting mechanism; 71\8230afirst rotation limiting part; 72 \ 8230a second rotation limiting part; 140 model 8230a gimbal frame main body part; 141 8230a first axial side extension part; 142, 8230, a second shaft side extension part; 143, 8230and an opening part; 144, 8230, a first axial side concave curved surface; 146 \ 8230a protruding part; 147 8230a second axis side concave curved surface; 148 \ 8230a gap; 151, 8230a first gimbal frame support member; 152 \ 8230a sphere; 153 \ 8230a first thrust support member; 154 \ 8230a plate portion; 155. 156, 8230a, an arm; 157, 8230a protrusion; 161 \ 8230a concave part; 162, 8230a second gimbal frame support member; 163\8230asphere; 164 \ 8230a second thrust support member; 165, 8230a plate part; 167 \ 8230and arm; 181 \ 8230and a first side plate part; 181a \ 8230and a first coil fixing hole; 182 8230a second side plate part; 182a \8230anda third coil fixing hole; 183 \ 8230and a third side panel part; 183a 8230, and a notch part; 184\8230afourth side plate part; 184a \8230anda second coil fixing hole; 191 \ 8230a first wall portion; 192, 8230and a second wall portion; 193\8230athird wall portion; 193a \ 8230and a gap part; 271, 8230, a first part of a first extension setting part; 272, 8230, a second part of the first extension setting part; 471 8230the first part of the second extension setting part; 472 \ 8230and a second part of the second extension part; 541 \ 8230a first arm part; 542,8230and a second arm; 543 8230while the connecting part; 544, 8230a first joint part; 551 \ 8230and a second joint part; l\8230aplain axis; r1 \ 8230and a first shaft; r2\8230anda second shaft; s8230and angle position sensor; t1, T2 and T3 \8230andgap.

Claims (12)

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 around 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 in 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 plate 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 that extends in the optical axis direction from an edge of one of the first annular plate portion and the second annular plate portion and is opposed to an edge of the other of the first annular plate portion and the second annular plate portion in a radial direction.

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

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

3. An optical unit with a shake correcting function according to claim 2,

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

4. The optical unit with shake correcting function according to claim 3,

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

the rotation restricting mechanism includes:

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

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

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

the plate spring portion includes a first plate spring portion having a plate thickness direction oriented in the circumferential direction,

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 that extends 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.

6. An optical unit with a shake correcting function according to claim 5,

the plate spring portion includes a second plate spring portion having a plate thickness direction directed in 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 a shake correcting function according to claim 6,

the metal member has:

a first metal member including the annular stationary body-side fixing portion and the first plate spring portion that is bent in the optical axis direction from an edge of a first cutout portion provided in the stationary body-side fixing portion and extends in the radial direction; and

a second metal member including the movable body-side fixing portion in a ring shape and the second plate spring portion that is bent in the optical axis direction from an edge of a second cutout portion provided in the movable body-side fixing portion and extends in a circumferential direction around the optical axis,

the front end of the second plate spring portion is engaged with the first plate spring portion.

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

at least three plate spring portions arranged in a distributed manner 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. An optical unit with a shake correcting function according to claim 8,

a gimbal mechanism that supports the rotation support mechanism so as to be rotatable about a first axis intersecting the optical axis and supports the rotation support mechanism so as to be rotatable about a second axis intersecting the optical axis and the first axis,

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 correcting function according to claim 9,

the second member includes: a pair of second extending portions protruding from the second annular plate portion toward both sides in the first axial direction; and a pair of second protruding plate portions protruding from the second annular plate portion toward both sides in the second axis 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 on both sides in the first axial direction and on both sides in the second axial direction,

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

11. An optical unit with a shake correcting function according to claim 10,

the plate spring includes four first plate spring portions arranged in a distributed manner in the circumferential direction,

slits extending in the radial direction and opening at an inner peripheral edge of the second annular plate portion are provided at the pair of second extending portions and the pair of second protruding 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 slit in the circumferential direction.

12. The optical unit with shake correcting function according to claim 10 or 11,

the holder convex part is arranged at the corner part at two sides of the second axis direction and the corner part at two sides of the first axis direction,

the holder convex portion provided at the corner portion on both sides in the second axial direction is opposed to the second projecting plate portion in the optical axis direction,

the holder projection provided at the corner portion on both sides in the first axial direction is opposed to the second extending portion in the optical axis direction.

Images