CN114815445B

CN114815445B - Optical unit with jitter correction function

Info

Publication number: CN114815445B
Application number: CN202210061381.9A
Authority: CN
Inventors: 新井努; 南泽伸司; 须江猛
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Sankyo Corp
Priority date: 2021-01-19
Filing date: 2022-01-19
Publication date: 2023-05-09
Anticipated expiration: 2042-01-19
Also published as: CN114815445A; JP2022110702A

Abstract

An optical unit with a shake correction function reduces the amount of a movable body that flies out of a fixed body. An optical unit (1) with a shake correction function is provided with: a movable body (5) provided with a camera module (4) and a swing support mechanism (7); a fixed body (8) for supporting the movable body via a swing support mechanism; a first stopper mechanism (51) for restricting the swing of the movable body; and a second stopper mechanism (53) that restricts movement of the movable body in the optical axis direction. The first stopper mechanism includes a first opposing portion (52) in which the movable body and the fixed body face each other with a first gap therebetween in the optical axis direction, and the second stopper mechanism includes a second opposing portion (54) in which the movable body and the fixed body face each other with a second gap therebetween in the optical axis direction. The distance between the second opposing portion and the optical axis (L) is smaller than the distance between the first opposing portion and the optical axis (L), and the second gap (S2) is narrower than the first gap (S1).

Description

Optical unit with jitter correction function

Technical Field

The present invention relates to an optical unit with a shake correction function that swings a camera module to perform shake correction.

Background

Among optical units mounted on a mobile terminal or a mobile unit, there is an optical unit in which a mobile unit including a camera module is swung around an optical axis or around an axis intersecting the optical axis in order to suppress disturbance of a photographed image when the mobile terminal or the mobile unit is moved. Patent document 1 discloses an optical unit with a shake correction function.

The optical unit with a shake correction function of patent document 1 includes: a movable body for holding the lens holder and the image pickup device inside the holder; a fixed body; and a gimbal mechanism that supports the movable body so as to be rotatable relative to the fixed body about a rotation axis intersecting the optical axis. A side plate part provided at the outer peripheral end of the retainer is provided with a stop protrusion which abuts against the fixed body when the movable body swings greatly to limit the swing range of the movable body.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication 2016-061958

Disclosure of Invention

Technical problem to be solved by the invention

In the optical unit with the shake correction function of patent document 1, a plate-like cover is attached to an end portion of the fixed body on the object side, and the tip end of the lens holder is disposed inside an opening portion provided in the cover. When the shake correction of the movable body is performed, the movable body is inclined at the inner side of the opening of the cover with the center of the swing as the center, so that the movable body does not greatly act in the optical axis direction as a whole, and the lens holder does not greatly fly out of the opening of the cover.

However, when a large acceleration is applied to the movable body due to falling or the like, the movable body does not swing but moves substantially in the optical axis direction as a whole. Therefore, the movable body may largely fly out from the opening of the cover toward the subject side and be damaged. For example, a lens disposed at the front end of the lens holder may collide with an external object and be damaged. In patent document 1, although the retainer is provided with a stopper protrusion for restricting the swing angle of the movable body, when the movable body is not swung but is operated in the optical axis direction in its entirety to a large extent, the lens retainer is largely thrown out from the opening portion prior to collision of the stopper protrusion with the fixed body. Therefore, damage to the lens cannot be prevented.

In view of these points, the present invention has an object to reduce the amount of the movable body that is thrown out of the fixed body.

Technical proposal adopted for solving the technical problems

In order to solve the above-described problems, the present invention provides an optical unit with a shake correction function, comprising: a movable body provided with a camera module; a swing support mechanism that supports the movable body so as to be swingable about a first axis intersecting an optical axis of the camera module, and supports the movable body so as to be swingable about a second axis intersecting the optical axis and the first axis; a fixed body that supports the movable body via the swing support mechanism; a first stopper mechanism that restricts the swing of the movable body around the first axis and the swing of the movable body around the second axis; and a second stopper mechanism that restricts movement of the movable body in the optical axis direction, wherein the first stopper mechanism includes a first opposing portion where the movable body and the fixed body face each other with a first gap therebetween in the optical axis direction, and the second stopper mechanism includes a second opposing portion where the movable body and the fixed body face each other with a second gap therebetween in the optical axis direction, wherein a distance between the second opposing portion and the optical axis is smaller than a distance between the first opposing portion and the optical axis, and wherein the second gap is narrower than the first gap.

According to the present invention, in addition to the first stopper mechanism that restricts the swing of the movable body, the second stopper mechanism that restricts the movement of the movable body in the optical axis direction is provided. The first stopper mechanism and the second stopper mechanism are both configured such that the fixed body and the movable body face each other with a gap therebetween in the optical axis direction, but the gap in the optical axis direction of the second opposing portion of the second stopper mechanism is narrower than the gap in the optical axis direction of the first opposing portion of the first stopper mechanism. Therefore, when the movable body moves in the optical axis direction and flies out from the fixed body at the time of an abnormality such as a drop, the collision of the second opposing portion in the optical axis direction precedes the collision of the first opposing portion in the optical axis direction. Therefore, the amount of the movable body which is moved out of the fixed body can be reduced. Further, since the second opposing portion is closer to the optical axis than the first opposing portion, when the movable body is swung to perform shake correction, it is possible to avoid a situation in which the second opposing portion collides before the first opposing portion and to restrict the swing angle of the movable body.

In the present invention, it is preferable that the movable body includes a holder for holding the camera module, and the holder includes: a frame portion surrounding an outer peripheral side of the camera module; and a first claw portion extending from the frame portion to an inner peripheral side and overlapping the camera module from the object side in the optical axis direction, wherein the fixing body includes a cover provided with an opening portion in which the camera module is disposed, and the first claw portion and the cover face each other in the optical axis direction to constitute the second opposing portion. Accordingly, the second opposing portion can be provided at a position close to the optical axis. Therefore, the restriction of the swing angle of the movable body by the second stopper mechanism can be avoided.

In the present invention, it is preferable that the cover includes a second claw portion extending from an end edge of the opening portion toward an inner peripheral side, and the first claw portion and the second claw portion face each other in the optical axis direction to form the second facing portion. Accordingly, by appropriately setting the shapes of the first claw portion and the second claw portion, the second gap can be made to conform to the design size. Therefore, the amount of the flying-out of the movable body can be easily adjusted.

In the present invention, it is preferable that the second stopper mechanism includes a movable body side protruding portion protruding from a front end of the first claw portion toward the cover in the optical axis direction, or a fixed body side protruding portion protruding from the cover toward a front end of the first claw portion in the optical axis direction. Accordingly, the second gap can be narrowed by the protruding height of the movable body side protrusion or the fixed body side protrusion. Therefore, the amount of the movable body which is moved out of the fixed body can be reduced.

In the present invention, it is preferable that the second opposing portion is configured by the tip of the first claw portion and the cover opposing each other in the optical axis direction, and the first opposing portion is configured by the holder and the cover opposing each other at a position on the outer peripheral side of the second opposing portion. Accordingly, the first stopper mechanism and the second stopper mechanism are each constituted by the holder and the cover facing each other. Therefore, the dimensional accuracy can be improved as compared with the case where the first stopper mechanism and the second stopper mechanism are provided between different parts.

In the present invention, it is preferable that the frame portion includes: a first side plate portion and a second side plate portion extending substantially in parallel with each other with the optical axis interposed therebetween; and third and fourth side plate portions extending substantially in parallel with the optical axis and orthogonal to the first and second side plate portions, wherein the first claw portion is provided at a center in a circumferential direction of each of the first, second, third, and fourth side plate portions. Accordingly, the first claw portions are disposed at positions close to the optical axis in the respective side plate portions. Therefore, the second opposing portion can be provided at a position close to the optical axis, so that the swing angle of the movable body can be prevented from being restricted by the second stopper mechanism.

Effects of the invention

According to the present invention, in addition to the first stopper mechanism that restricts the swing of the movable body, the second stopper mechanism that restricts the movement of the movable body in the optical axis direction is provided. The first stopper mechanism and the second stopper mechanism are both configured to face each other with a gap in the optical axis direction between the fixed body and the movable body, but the gap in the optical axis direction between the second opposing portion of the second stopper mechanism is narrower than the gap in the optical axis direction between the first opposing portion of the first stopper mechanism. Therefore, when the movable body moves in the optical axis direction and flies out of the fixed body at the time of an abnormality such as a drop, the collision of the second opposing portion in the optical axis direction precedes the collision of the first opposing portion in the optical axis direction, so that the flying-out amount of the movable body to the outside of the fixed body can be reduced. Further, since the second opposing portion is closer to the optical axis than the first opposing portion, when the movable body is swung to perform shake correction, it is possible to avoid a situation in which the second opposing portion collides before the first opposing portion and to restrict the swing angle of the movable body.

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 a shake correction function of fig. 1.

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

Fig. 4 is a cross-sectional view of an optical unit with a shake correction function (A-A cross-sectional view of fig. 3).

Fig. 5 is an exploded perspective view of the swing support mechanism.

Fig. 6 is a sectional view of the first connecting mechanism (section B-B of fig. 3).

Fig. 7 is an explanatory diagram schematically showing the operation of the first stopper mechanism and the second stopper mechanism.

Fig. 8 is an explanatory diagram schematically showing a modification of the second stopper mechanism.

Description of the reference numerals

1 … an optical unit with a shake correction function; 2 … lenses; 3 … imaging element; 4 … camera module; 5 … movable body; 6 … magnetic drive mechanism for shake correction; 6X … first shake correction magnetic drive mechanism; 6Y … second magnetic driving means for shake correction; 7 … pendulum support mechanism; 8 … fixed body; 9. 10 … flexible printed substrate; 11 … cage; 12 … frame portion; 13 … first pawl; 14 … first projection; 15 … first extension; 16 … movable body side projections; 17 … first recess; 18 … first rod receiving members; 19 … power supply substrate; 20 … shell; 21 … first side wall portions; 21a … coil fixing holes; 22 … second side wall portion; 23 … third side wall portion; 23a … coil fixing holes; 24 … fourth side wall portion; 25 … wiring housing; 26 … second recess; 27 … second stem receiving part; 30 … base; 31 … cover; 32 … opening portions; 33 … second pawl; 34 … second projection; 35 … second extension; 40 … camera module body; 41 … barrel portion; 41a … large diameter portion; 41b … small diameter portion; 51 … first stop mechanism; 52 … first opposed portions; 53 … second stop mechanism; 54 … second opposed portions; 61X … first magnet; 61Y … second magnet; 62X … first coil; 62Y … second coil; 63 … magnetic plates; 70 … poles; 71 … first connecting means; 72 … second coupling mechanism; a 74 … pole body; 75 … first arm; 76 … second arm; 77 … first convex curved surface; 78 … second convex curved surface; 80 … fixed body side projections; 121 … first side panel portion; 122 … second side panel portion; 123 … third side panel portion; 124 … fourth side panel portion; 125 … fifth side panel portion; 126 … sixth side panel portion; 127 and … seventh side plate portion; 128 … eighth side panel portion; 129 … rod retaining portions; 321 … first edge portion; 322 … second edge portion; 323 … third edge; 324 … fourth edge; 701. 702 … plate portion; 703 … connection; 704 … leaf spring portions; 705 … concave curve; 706 … house recesses; l … optical axis; r1 … first axis; r2 … second axis; s1 … first gap; s2 … second gap.

Detailed Description

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

(integral structure)

Fig. 1 is a perspective view of an optical unit 1 with a shake correction function to which the present invention is applied. Fig. 2 is an exploded perspective view of the optical unit 1 with a shake correction function of fig. 1. Fig. 3 is a plan view of the optical unit 1 with the shake correction function with the cover removed, as viewed from the side opposite to the subject. Fig. 4 is a cross-sectional view of the optical unit 1 with the shake correction function, and is a cross-sectional view taken at the A-A position in fig. 3. Fig. 5 is an exploded perspective view of the swing support mechanism. Fig. 6 is a cross-sectional view of the first connection mechanism, partially cut away at position B-B of fig. 3.

The optical unit 1 with the shake correction function includes a camera module 4, and the camera module 4 includes a lens 2 and an imaging element 3 (see fig. 4). The optical unit 1 with the shake correction function is used for optical devices such as a cellular phone with a camera and a car recorder, or optical devices such as a moving camera or a wearable camera mounted on a moving body such as a helmet, a bicycle, a remote helicopter, or the like. In such an optical apparatus, if shake of the optical apparatus is generated at the time of photographing, a disturbance is generated in a photographed image. The optical unit 1 with shake correction function corrects the tilt of the camera module 4 based on the acceleration or angular velocity, the amount of shake, and the like detected by the detection unit such as a gyroscope to avoid the tilt of the photographed image.

The optical unit 1 with the shake correction function rotates the camera module 4 around a first axis R1 orthogonal to the optical axis L of the lens 2, and rotates the camera module 4 around a second axis R2 orthogonal to the optical axis L and the first axis R1, thereby performing shake correction.

In the following description, three axes orthogonal to each other are referred to as an X axis, a Y axis, and a Z axis. The Z axis coincides with the optical axis L of the lens 2. When the plane including the X axis and the Y axis is defined as the XY plane, the first axis R1 and the second axis R2 are located on the XY plane. The first and second axes R1 and R2 are inclined 45 degrees with respect to the X and Y axes.

In the following description, the direction along the optical axis L is referred to as an optical axis direction, and the directions along the X-axis, Y-axis, and Z-axis are referred to as an X-axis direction, a Y-axis direction, and a Z-axis direction. The Z-axis direction is coincident with the optical axis direction. One side in the X-axis direction is defined as the-X direction, the other side is defined as the +X direction, one side in the Y-axis direction is defined as the-Y direction, the other side is defined as the +Y direction, one side in the Z-axis direction is defined as the-Z direction, and the other side is defined as the +Z direction. The Z direction is the opposite side of the object of the camera module 4, and the +z direction is the object side of the camera module 4. The direction along the first axis R1 is defined as the first axis R1 direction, and the direction along the second axis R2 is defined as the second axis R2 direction.

As shown in fig. 1, 2, and 3, the optical unit 1 with a shake correction function includes: a movable body 5 having a camera module 4; a magnetic driving mechanism 6 for shake correction; a swing support mechanism 7; and a fixed body 8 supporting the movable body 5 via a swing supporting mechanism 7. The swing support mechanism 7 supports the movable body 5 so as to be swingable about the first axis R1 and about the second axis R2. The movable body 5 is rotatable in the pitch direction around the X axis and the yaw direction around the Y axis by combining the rotation around the first axis R1 and the rotation around the second axis R2. The optical unit 1 with the shake correction function performs pitch correction and yaw correction.

As shown in fig. 3, the magnetic driving mechanism 6 for shake correction includes a first magnetic driving mechanism 6X for shake correction that generates a driving force about the X axis on the movable body 5, and a second magnetic driving mechanism 6Y for shake correction that generates a driving force about the Y axis on the movable body 5. In the present embodiment, the first shake correction magnetic drive mechanism 6X is disposed in the-Y direction of the movable body 5. The second shake correction magnetic drive mechanism 6Y is disposed in the-X direction of the movable body 5.

The optical unit 1 with the shake correction function includes a flexible printed board 9 for outputting a signal from the imaging element 3 and a flexible printed board 10 for supplying power to the shake correction magnetic drive mechanism 6. As shown in fig. 2, the flexible printed board 9 is led out in the +x direction from the end of the movable body 5 in the-Z direction. The flexible printed board 10 is wound around the side surface of the fixing body 8 in the-Y direction and the-X direction.

(Movable body)

As shown in fig. 3 and 4, the movable body 5 includes a camera module 4 and a holder 11 for holding the camera module 4. As shown in fig. 2 and 3, the camera module 4 includes: a camera module body 40 having an octagonal shape when viewed from the optical axis direction; and a lens barrel portion 41 protruding in the +z direction (object side) from the center of the camera module body 40, and the lens 2 is held in the lens barrel portion 41 (see fig. 4). The lens barrel 41 includes: a large diameter portion 41a connected to the camera module body 40; and a small diameter portion 41b protruding in the +z direction from the center of the large diameter portion 41a in the radial direction. The imaging element 3 is disposed at an end of the camera module body 40 in the-Z direction (see fig. 4).

The holder 11 includes: a frame 12 surrounding the outer peripheral side of the camera module 4; and a first claw portion 13 extending in the +z direction from an end portion in the +z direction of the frame portion 12 and bent toward the inner peripheral side. As shown in fig. 2 and 3, the frame 12 is substantially octagonal when viewed in the optical axis direction. The frame 12 includes: a first side plate portion 121 and a second side plate portion 122 opposed in the Y-axis direction across the optical axis L; and a third side plate portion 123 and a fourth side plate portion 124 facing each other in the X-axis direction across the optical axis L. The first side plate portion 121 and the second side plate portion 122 extend parallel to the X-axis direction, and the third side plate portion 123 and the fourth side plate portion 124 extend parallel to the Y-axis direction. The frame 12 further includes: a fifth side plate portion 125 and a sixth side plate portion 126 facing each other in the first axis R1 direction across the optical axis L; and a seventh side plate portion 127 and an eighth side plate portion 128 facing each other in the second axis R2 direction across the optical axis L.

The first claw portion 13 is provided at four positions of the first side plate portion 121, the second side plate portion 122, the third side plate portion 123, and the fourth side plate portion 124. As shown in fig. 5, the first claw portion 13 includes: a first protruding portion 14 protruding in the +z direction from the center in the circumferential direction of the first side plate portion 121, the second side plate portion 122, the third side plate portion 123, and the fourth side plate portion 124; and a first extension 15 extending from the front end of the first projection 14 toward the inner peripheral side. As shown in fig. 3, the first extension 15 overlaps the camera module body 40 from the +z direction (subject side). A movable body side projection 16 projecting in the +z direction is provided at the tip of the first extension 15. The movable body-side protruding portion 16 is semicircular when viewed in the optical axis direction, and is disposed at the center in the circumferential direction of the tip end of the first extension portion 15.

As shown in fig. 3, a first magnet 61X is fixed to a side surface of the movable body 5 in the-Y direction. Further, a second magnet 61Y is fixed to a side surface of the movable body 5 in the-X direction. The first magnet 61X is fixed to a first side plate portion 121 extending along the side surface of the camera module 4 in the-Y direction. In addition, the second magnet 61Y is fixed to a third side plate portion 123 extending along the side surface of the camera module 4 in the-X direction. The magnetic plates 63 are disposed in the +y direction of the first magnet 61X and the +x direction of the second magnet 61Y, respectively.

As shown in fig. 2, 3 and 5, the holder 11 includes a lever holding portion 129 extending outward from the fifth side plate portion 125 disposed at a corner portion in the first axis R1 direction of the movable body 5. The lever holding portion 129 is provided with a first recess 17 recessed in the-Z direction, and the first lever receiving member 18 is fixed to the first recess 17. As will be described later, the first lever receiving member 18 constitutes a first connection mechanism 71 of the swing support mechanism 7.

(fixed body)

The fixed body 8 includes a resin case 20 surrounding the outer periphery of the movable body 5. The housing 20 includes: a first side wall portion 21 and a second side wall portion 22 extending parallel to the X axis direction on both sides of the movable body 5 in the Y axis direction; a third side wall portion 23 and a fourth side wall portion 24 extending parallel to the Y axis direction on both sides of the X axis direction of the movable body 5; and a wiring case 25 for accommodating the flexible printed board 9 led out in the +x direction from the movable body 5. The wiring housing 25 is connected to the fourth side wall portion 24.

The fixing body 8 further includes: a base 30 fixed to the housing 20 from the-Z direction; and a cover 31 fixed to the housing 20 from the +z direction. The base 30 and the cover 31 are made of metal. The flexible printed circuit board 9 is drawn out in the +x direction from the movable body 5, accommodated between the wiring housing 25 and the mount 30, and drawn out to the outside of the fixed body 8 from a gap between the wiring housing 25 and an end of the mount 30 in the +x direction (see fig. 1).

The cover 31 includes a rectangular opening 32 and a second claw 33 extending in the +z direction from an end edge of the opening 32 and bent toward the inner peripheral side. As shown in fig. 1, the lens barrel 41 of the camera module 4 protrudes in the +z direction from the opening 32 of the cover 31. As shown in fig. 2, the opening 32 includes: a first edge 321 and a second edge 322 extending parallel to the X-axis direction; and third and

fourth edge portions

323 and 324 extending parallel to the Y-axis direction. The second edge 322 is disposed in the +y direction of the first edge 321, and the fourth edge 324 is disposed in the +x direction of the third edge 323. The second claw portion 33 is provided at the center in the circumferential direction of the first edge portion 321, the second edge portion 322, the third edge portion 323, and the fourth edge portion 324. The second claw portion 33 includes: a second protruding portion 34 protruding in the +z direction from an end edge of the opening portion 32; and a second extension 35 extending from the front end of the second protrusion 34 toward the inner peripheral side. As shown in fig. 1 and 4, the second extension 35 overlaps the first extension 15 of the first claw portion 13 provided on the holder 11 from the +z direction (object side).

As shown in fig. 3, a first coil 62X is fixed to a side surface of the case 20 in the-Y direction. The second coil 62Y is fixed to the side surface of the case 20 in the-X direction. The first coil 62X is disposed in a coil fixing hole 21a provided in the first side wall portion 21 of the housing 20. The second coil 62Y is disposed in a coil fixing hole 23a provided in the third side wall portion 23 of the housing 20. As shown in fig. 2, the first coil 62X and the second coil 62Y are oblong hollow coils long in the circumferential direction.

The first coil 62X and the second coil 62Y are electrically connected to the flexible printed board 10. The flexible printed circuit board 10 is wound around the first side wall portion 21 and the third side wall portion of the case 20, extends to the side surface of the wiring case 25 in the-Y direction, and is connected to the power feeding board 19 fixed to the surface of the wiring case 25 in the +z direction.

As shown in fig. 2 and 3, a second concave portion 26 recessed in the-Z direction is provided at a corner portion of the case 20 on one side in the second axis R2 direction. A second rod receiving member 27 having the same shape as the first rod receiving member 18 fixed to the first recess 17 of the holder 11 is fixed to the second recess 26. As will be described later, the second lever receiving member 27 constitutes a second connection mechanism 72 of the swing support mechanism 7.

(swinging support mechanism)

Fig. 5 is an exploded perspective view of the swing support mechanism 7. As shown in fig. 3, the swing support mechanism 7 is disposed in the +y direction of the movable body 5. The swing support mechanism 7 includes a lever 70, a first connection mechanism 71, and a second connection mechanism 72. The first connection mechanism 71 connects the lever 70 and the movable body 5 to be rotatable about the first axis R1. The second connection mechanism 72 connects the lever 70 and the housing 20 to be rotatable about the second axis R2. When the swing support mechanism 7 is configured, the movable body 5 can swing around the first axis R1 and around the second axis R2 with a point where the three axes of the optical axis L, the first axis R1, and the second axis R2 intersect as a swing center.

The lever 70 includes: a lever body 74 extending in the X-axis direction; a first arm 75 extending in the second axis R2 direction from the +x direction end of the lever body 74; and a second arm portion 76 extending in the first axis R1 direction from an end portion of the lever body 74 in the-X direction. As shown in fig. 5, the first arm portion 75 includes a pair of first convex curved surfaces 77 on the first axis R1. The pair of first convex curved surfaces 77 protrude in opposite directions in the direction of the first axis R1. The second arm 76 has a pair of second convex curved surfaces 78 on the second axis R2. The pair of second convex curved surfaces 78 protrude in opposite directions in the second axis R2 direction. The first convex curved surface 77 and the second convex curved surface 78 are spherical surfaces.

As shown in fig. 2 and 3, the first arm 75 is disposed at a rod holding portion 129 provided at a corner of the holder 11 in the direction of the first axis R1, and is supported rotatably about the first axis R1 by the first rod receiving member 18 fixed to the first recess 17. As shown in fig. 3, the second arm 76 is disposed at a corner of the housing 20 in the second axis R2 direction, and is supported rotatably about the second axis R2 by the second lever receiving member 27 fixed to the second recess 26.

The first rod receiving member 18 and the second rod receiving member 27 are made of metal. As shown in fig. 5, each of the first rod receiving member 18 and the second rod receiving member 27 includes: a pair of

opposed plate portions

701, 702; a connection portion 703 extending in the +z direction from the plate portion 701, bent in the opposite direction, and connected to the plate portion 702; and a plate spring portion 704 extending in the +z direction after being bent from the plate portion 701 to the opposite side of the plate portion 702. Concave curved surfaces 705 are provided on the pair of

plate portions

701 and 702, respectively. Accordingly, the first rod receiving member 18 and the second rod receiving member 27 are provided with a pair of concave curved surfaces 705 facing each other.

As shown in fig. 6, the first arm portion 75 of the lever 70 is disposed in the first recess 17 of the holder 11 in a state of being inserted between the pair of

plate portions

701, 702 of the first lever receiving member 18. As shown in fig. 3 and 5, the first concave portion 17 is a groove portion extending in the direction of the second axis R2, and opens at the side surface of the lever holding portion 129 in the-X direction. When the first rod receiving member 18 is fitted into the first recess 17, the plate spring portion 704 is deflected toward the plate portion 701 side and pushed into the accommodation recess 706 provided on the inner side surface of the first recess 17. Accordingly, the plate portion 701 is biased toward the plate portion 702, and the pair of concave curved surfaces 705 provided on the first lever receiving member 18 are in point contact with the pair of first convex curved surfaces 77 provided on the first arm portion 75 on the first axis R1 (see fig. 6). Thus, the first connection mechanism 71 is configured to connect the lever 70 to be rotatable about the first axis R1 with respect to the movable body 5.

Similarly, the second arm portion 76 of the lever 70 is disposed in the second recess 26 of the housing 20 in a state of being inserted between the pair of

plate portions

701, 702 of the second lever receiving member 27. The second recess 26 is a groove extending in the direction of the first axis R1, and opens into the inner peripheral surface of the housing 20. When the second rod receiving member 27 is fitted into the second recess 26, the plate spring portion 704 is deflected toward the plate portion 701 side and pushed into the accommodation recess 706 provided on the inner side surface of the second recess 26. Thereby, the plate portion 701 is biased toward the plate portion 702, and the pair of concave curved surfaces 705 provided on the second lever receiving member 27 are in point contact with the pair of second convex curved surfaces 78 provided on the second arm portion 76 on the second axis R2. Thus, the second connection mechanism 72 is configured to connect the lever 70 to be rotatable about the second axis R2 with respect to the fixed body 8.

(drive mechanism for shake correction)

As shown in fig. 3, when the movable body 5 is disposed inside the housing 20 and the movable body 5 and the housing 20 are connected by the swing support mechanism 7, the first magnet 61X fixed to the side surface of the movable body 5 in the-Y direction and the first coil 62X fixed to the housing 20 face each other in the Y axis direction, and the first shake correction magnetic drive mechanism 6X is configured. Thus, by supplying power to the first coil 62X, the movable body 5 rotates about the X axis. The second magnet 61Y fixed to the side surface of the movable body 5 in the-X direction and the second coil 62Y fixed to the housing 20 are opposed to each other in the X-axis direction, and the second shake correction magnetic drive mechanism 6Y is configured. Accordingly, by supplying power to the second coil 62Y, the movable body 5 rotates around the Y axis. The shake correction magnetic drive mechanism 6 combines the rotation of the movable body 5 around the X axis driven by the first shake correction magnetic drive mechanism 6X and the rotation of the movable body 5 around the Y axis driven by the second shake correction magnetic drive mechanism 6Y, and rotates the movable body 5 around the first axis R1 and around the second axis R2.

(first stop mechanism)

The optical unit 1 with shake correction function includes a first stopper mechanism 51 that restricts the swing of the movable body 5 around the first axis R1 and the swing of the movable body 5 around the second axis R2. The first stopper mechanism 51 includes a first opposing portion 52 where the movable body 5 and the fixed body 8 face each other with a first gap S1 therebetween in the optical axis direction. As shown in fig. 4, in the optical unit 1 with the shake correction function, the holder 11 constituting the movable body 5 and the cover 31 constituting the fixed body 8 are opposed to each other in the optical axis direction around the lens barrel portion 41 of the camera module 4. More specifically, the holder 11 includes a first extension portion 15 that covers the camera module body 40 from the +z direction (subject side), and the cover 31 includes a second extension portion 35 that overlaps the first extension portion 15 from the +z direction (subject side). The first opposing portion 52 is formed by opposing the second extending portion 35 with a first gap S1 therebetween in the optical axis direction at a curved portion connecting the first extending portion 15 and the first protruding portion 14.

In the present embodiment, the opening 32 of the cover 31 is rectangular, and the diagonal portion in the first axis R1 direction and the diagonal portion in the second axis R2 direction of the holder 11 are located on the inner peripheral side of the opening 32 when viewed in the optical axis direction (see fig. 1). Therefore, when the movable body 5 swings around the first axis R1 and around the second axis R2, the diagonal portion in the first axis R1 direction and the diagonal portion in the second axis R2 direction of the holder 11 do not abut against the cover 31, and the bent portion connecting the first extension 15 and the first protrusion 14 abuts against the second extension 35 from the-Z direction, thereby restricting the swing of the movable body 5. Therefore, the first opposing portion 52 abuts against and restricts the swing of the movable body 5.

(second stop mechanism)

The optical unit 1 with shake correction function includes a second stopper mechanism 53 that restricts movement of the movable body 5 in the optical axis direction. The second stopper mechanism 53 includes a second opposing portion 54 where the movable body 5 and the fixed body 8 face each other with a second gap S2 therebetween in the optical axis direction. As shown in fig. 4, in the optical unit 1 with the shake correction function, the holder 11 includes a movable body side protruding portion 16 provided at the front end of the first extension portion 15, and the second opposing portion 54 is configured by the movable body side protruding portion 16 and the front end of the second extension portion 35 provided in the cover 31 opposing each other with a second gap S2 therebetween in the optical axis direction.

Fig. 7 is an explanatory diagram schematically showing the operation of the first stopper mechanism 51 and the second stopper mechanism 53. Fig. 7 (a) shows a state of the reference posture in which the movable body 5 is not swung. In the reference posture, the optical axis L and the Z axis of the camera module 4 coincide. Fig. 7 (b) shows a state in which the swing of the movable body 5 is restricted by the first stopper mechanism 51, and fig. 7 (c) shows a state in which the movement of the movable body 5 in the +z direction is restricted by the second stopper mechanism 53. As shown in fig. 4 and 7, the second opposing portion 54 is disposed on the inner peripheral side of the first opposing portion 52, and the distance between the second opposing portion 54 and the optical axis L is smaller than the distance between the first opposing portion 52 and the optical axis L. Therefore, when the shake correction of the movable body 5 is performed, as shown in fig. 7 (b), the first opposing portion 52 opposing the first gap S1 wider than the second gap S2 collides with the second opposing portion 54 opposing the second gap S2, so that the swing of the movable body 5 is restricted.

Next, when acceleration in the +z direction is applied to the movable body 5 due to a drop impact or the like, the movable body 5 as a whole moves relative to the fixed body 8 in the +z direction so that the movable body 5 does not incline. Therefore, as shown in fig. 7 (c), the camera module 4 is restricted from largely flying out in the +z direction from the opening 32 of the cover 31 by the collision of the first opposing portion 52 opposing the first gap S1 and the collision of the second opposing portion 54 opposing the second gap S2 narrower than the first gap S1.

(main effects of the present embodiment)

As described above, the optical unit 1 with a shake correction function according to the present embodiment includes: a movable body 5 provided with a camera module 4; a swing support mechanism 7 that supports the movable body 5 so as to be swingable about a first axis R1 intersecting the optical axis L of the camera module 4, and supports the movable body 5 so as to be swingable about a second axis R2 intersecting the optical axis L and the first axis R1; a fixed body 8 that supports the movable body 5 via a swing support mechanism 7; a first stopper mechanism 51 for restricting the swing of the movable body 5 around the first axis R1 and the swing of the movable body 5 around the second axis R2; and a second stopper mechanism 53 that restricts movement of the movable body 5 in the optical axis direction. The first stopper mechanism 51 includes a first opposing portion 52 where the movable body 5 and the fixed body 8 face each other with a first gap S1 therebetween in the optical axis direction, and the second stopper mechanism 53 includes a second opposing portion 54 where the movable body 5 and the fixed body 8 face each other with a second gap S2 therebetween in the optical axis direction. The distance between the second opposing portion 54 and the optical axis L is smaller than the distance between the first opposing portion 52 and the optical axis L, and the second gap S2 is narrower than the first gap S1.

As described above, in the present embodiment, the second stopper mechanism 53 that restricts the movement of the movable body 5 in the optical axis direction is provided in addition to the first stopper mechanism 51 that restricts the swing of the movable body 5. The first stopper mechanism 51 and the second stopper mechanism 53 are each configured to face each other with a gap in the optical axis direction between the fixed body 8 and the movable body 5, but the gap in the optical axis direction between the second opposing portions 54 constituting the second stopper mechanism 53 is narrower than the gap in the optical axis direction between the first opposing portions 52 constituting the first stopper mechanism 51. Therefore, when the movable body 5 moves in the +z direction (object side) and flies out from the fixed body 8 at the time of an abnormality such as a drop, the collision of the second opposing portion 54 in the optical axis direction precedes the collision of the first opposing portion 52 in the optical axis direction. Therefore, the amount of the movable body 5 which is thrown out of the fixed body 8 is small. The second opposing portion 54 is closer to the optical axis L than the first opposing portion 52. Therefore, when the movable body 5 is swung to perform shake correction, it is possible to avoid a situation in which the collision of the second opposing portion 54 precedes the collision of the first opposing portion 52, and to restrict the swing of the movable body 5. That is, by providing the second stopper mechanism 53, the amount of the movable body 5 that is moved out can be reduced without restricting the shake-corrected swing angle.

In the present embodiment, the movable body 5 includes a holder 11 for holding the camera module 4, and the holder 11 includes: a frame 12 surrounding the outer peripheral side of the camera module 4; and a first claw portion 13 extending from the frame portion 12 to the inner peripheral side and overlapping the camera module 4 from the +z direction (object side). The fixed body 8 includes a cover 31, the cover 31 is provided with an opening 32 in which the lens barrel 41 of the camera module 4 is disposed, and the first claw portion 13 and the cover 31 face each other in the optical axis direction to form a second facing portion 54. In this way, by providing the holder 11 with a portion that protrudes further toward the inner peripheral side than the outer peripheral surface of the camera module 4 and covers the camera module 4, the second stopper mechanism 53 can be provided at a position close to the optical axis L. Therefore, the restriction of the swing angle of the movable body 5 by the second stopper mechanism 53 can be avoided.

In the present embodiment, the cover 31 includes a second claw portion 33 extending from an end edge of the opening portion 32 toward the inner peripheral side, and the second opposing portion 54 is configured by opposing the tip end of the first claw portion 13 and the tip end of the second claw portion 33 in the optical axis direction. Therefore, by appropriately setting the shapes of the first claw portion 13 and the second claw portion 33, the second gap S2 can be made to conform to the design size. Therefore, the amount of the movable body 5 to be moved can be easily adjusted. In the present embodiment, the first claw portion 13 and the second claw portion 33 each have a shape protruding in the +z direction and then bent toward the inner peripheral side. Therefore, the height of the fixing body 8 on the outer peripheral side of the first stopper mechanism 51 and the second stopper mechanism 53 in the optical axis direction can be reduced. Therefore, the outer shape of the optical unit 1 with the shake correction function can be reduced.

In the present embodiment, the second stopper mechanism 53 includes the movable body side protruding portion 16 protruding in the optical axis direction from the tip end of the first claw portion 13 toward the cover 31. Therefore, the second gap S2 can be narrowed by the protruding height of the movable body side protruding portion 16 compared to the first gap S1, and the amount of the movable body 5 that is projected to the outside of the fixed body 8 can be reduced.

In the present embodiment, the second opposing portion 54 is formed by the tip of the first claw portion 13 and the cover 31 opposing each other in the optical axis direction, and the first opposing portion 52 is formed by the holder 11 and the cover 31 opposing each other at a position on the outer peripheral side of the second opposing portion. More specifically, the distal end portion of the first extension portion 15 of the first claw portion 13 constitutes the second opposing portion 54, and the bent portion connecting the first extension portion 15 and the first protruding portion 14 constitutes the first opposing portion 52. Therefore, the first stopper mechanism 51 and the second stopper mechanism 53 are both constituted by the holder 11 and the cover 31 facing each other, and both the stopper mechanisms are constituted between the same components. Therefore, the dimensional accuracy can be improved as compared with the case where two stopper mechanisms are provided between different parts, respectively.

In the present embodiment, the frame 12 includes: a first side plate portion 121 and a second side plate portion 122 extending substantially in parallel with each other with the optical axis L interposed therebetween; and third and fourth

side plate portions

123 and 124 extending substantially in parallel with the optical axis L and orthogonal to the first and second

side plate portions

121 and 122, and the first claw portion 13 is provided at a center in a circumferential direction of each of the first, second, third and fourth

side plate portions

121 and 122. The center in the circumferential direction of each side plate portion is a position closest to the optical axis L in the holder 11. Therefore, the first claw portion 13 can be disposed at a position close to the optical axis L, and the second stopper mechanism 53 can be disposed at a position close to the optical axis L. Therefore, the restriction of the swing angle of the movable body 5 by the second stopper mechanism 53 can be avoided.

(other embodiments)

(1) Fig. 8 is an explanatory diagram schematically showing a modification of the second stopper mechanism 53. In the above embodiment, the movable body side projecting portion 16 projecting in the +z direction is provided at the front end of the first extending portion 15 of the first claw portion 13, and in the modification, the fixed body side projecting portion 80 projecting in the-Z direction is provided at the front end of the second extending portion 35 of the second claw portion 33 instead of the movable body side projecting portion 16 provided at the first claw portion 13. The second stopper mechanism 53 of the modification includes a second opposing portion 54 formed by opposing the fixed body side protruding portion 80 and the distal end of the first extension portion 15. With this configuration, the second gap S2 can be narrowed by the protruding dimension of the fixed body side protruding portion 80 compared to the first gap S1, as in the above embodiment. Therefore, the same operational effects as those of the above embodiment can be obtained.

(2) The above embodiment is an embodiment in which the movable body 5 is swung in the pitch direction and the yaw direction to perform shake correction about two axes, but the present invention is also applicable to an optical unit with a shake correction function in which the movable body 5 is swung about three axes.

Claims

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

a movable body provided with a camera module;

a swing support mechanism that supports the movable body so as to be swingable about a first axis intersecting an optical axis of the camera module, and supports the movable body so as to be swingable about a second axis intersecting the optical axis and the first axis;

a fixed body that supports the movable body via the swing support mechanism;

a first stopper mechanism that restricts the swing of the movable body around the first axis and the swing of the movable body around the second axis; and

a second stopper mechanism that restricts movement of the movable body in the optical axis direction,

the first stopper mechanism includes a first opposing portion where the movable body and the fixed body face each other with a first gap therebetween in the optical axis direction,

the second stopper mechanism includes a second opposing portion where the movable body and the fixed body face each other with a second gap therebetween in the optical axis direction,

the distance between the second opposing portion and the optical axis is smaller than the distance between the first opposing portion and the optical axis, and the second gap is narrower than the first gap.

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

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

the retainer comprises: a frame portion surrounding an outer peripheral side of the camera module; and a first claw portion extending from the frame portion to an inner peripheral side and overlapping the camera module from an object side in the optical axis direction,

the fixing body is provided with a cover, the cover is provided with an opening part for the camera module to be configured,

the first claw portion and the cover are opposed to each other in the optical axis direction to form the second opposed portion.

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

the cover includes a second claw portion extending from an end edge of the opening portion toward an inner peripheral side,

the second opposing portion is configured by opposing the first claw portion and the second claw portion in the optical axis direction.

4. An optical unit with a shake correction function according to claim 2 or 3,

the second stopper mechanism includes a movable body-side protruding portion protruding from the front end of the first claw portion toward the cover or a fixed body-side protruding portion protruding from the cover toward the front end of the first claw portion.

5. The optical unit with a shake correction function according to any one of claims 2 to 4,

the second opposing portion is configured by opposing the cover in the optical axis direction with the tip of the first claw portion,

the first opposing portion is configured by opposing the retainer and the cover at an outer peripheral side of the second opposing portion.

6. The optical unit with a shake correction function according to any one of claims 2 to 5,

the frame section includes: a first side plate portion and a second side plate portion extending substantially in parallel with each other with the optical axis interposed therebetween; and third and fourth side plate portions extending substantially parallel to each other across the optical axis and orthogonal to the first and second side plate portions,

the first claw portion is provided at a center in a circumferential direction of each of the first side plate portion, the second side plate portion, the third side plate portion, and the fourth side plate portion.