CN114200734B

CN114200734B - Optical unit with jitter correction function

Info

Publication number: CN114200734B
Application number: CN202110974992.8A
Authority: CN
Inventors: 武井宏光
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Sankyo Corp
Priority date: 2020-08-31
Filing date: 2021-08-24
Publication date: 2023-04-28
Anticipated expiration: 2041-08-24
Also published as: CN114200734A; JP2022040522A

Abstract

An optical unit with a shake correction function is capable of preventing or suppressing a space required for rotating a movable body from becoming large on the object side of the movable body. The optical unit with the shake correction function includes: a movable body provided with a camera module; a gimbal mechanism that supports the movable body rotatably about a first axis and a second axis; and a fixed body supporting the movable body via a gimbal mechanism. The gimbal mechanism is provided with: a gimbal spring (70) having a first connecting portion (74) located on both sides of the movable body in the first axial direction, a pair of second connecting portions (75) located on both sides of the movable body in the second axial direction, and four arm portions (73) connecting the first connecting portion and the second connecting portion adjacent in the circumferential direction on the outer circumferential side of the movable body; a first connection mechanism (71) that connects each first connection portion and the movable body so as to be rotatable about a first axis; and a second connection mechanism (72) that connects the second connection portion and the fixed body so as to be rotatable about the second axis.

Description

Optical unit with jitter correction function

Technical Field

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

Background

Among optical units mounted on a mobile terminal or a mobile body, there is an optical unit in which a mobile body including a camera module is rotated about an optical axis, about a first axis orthogonal to the optical axis, and about a second axis orthogonal to the optical axis and the first axis in order to suppress disturbance of a captured image when the mobile terminal or the mobile body is moved. Patent document 1 describes an optical unit with a shake correction function of this kind.

The optical unit with a shake correction function of patent document 1 includes: a movable body provided with a camera module; a rotation support mechanism for supporting the movable body rotatably about the optical axis; a gimbal mechanism that supports the rotation support mechanism so as to be rotatable about a first axis and a second axis; and a fixed body for supporting the movable body via the gimbal mechanism and the rotation supporting mechanism. The rotation support mechanism includes an intermediate frame disposed between the movable body and the fixed body, and a plurality of elastic members provided between the movable body and the intermediate frame in a radial direction. The plurality of elastic members are disposed at equal angular intervals around the optical axis, allowing rotation of the movable body relative to the intermediate frame body around the optical axis. The gimbal mechanism includes a gimbal frame composed of a leaf spring, a first connection mechanism connecting the gimbal frame and the intermediate frame to be rotatable about a first axis, and a second connection mechanism connecting the gimbal frame and the fixed body to be rotatable about a second axis.

When the optical axis direction is viewed from the object side, the gimbal frame includes a gimbal frame portion overlapping the movable body, a first extending portion protruding from the corners of both sides of the gimbal frame portion in the first axial direction toward the opposite side of the object, and a second extending portion protruding from the corners of both sides of the gimbal frame portion in the second axial direction toward the opposite side of the object. The first connecting mechanism is arranged between the first extending part and the middle frame body. The second connecting mechanism is arranged between the second extending part and the fixed body. The gimbal frame rotates with the movable body about the first axis and about the second axis.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2019-200270

Disclosure of Invention

Technical problem to be solved by the invention

In the gimbal mechanism of patent document 1, the gimbal frame includes a gimbal frame portion that overlaps with the movable body from the object side. Therefore, when the movable body is rotated about the first axis and the second axis, it is necessary to secure an extra space for rotation of the gimbal frame portion on the subject side of the movable body in addition to the space required for rotation of the movable body.

In view of such a point, an object of the present invention is to provide an optical unit with a shake correction function that can prevent or suppress an increase in space required for the rotation of a movable body on the object side of the movable body.

Technical proposal adopted for solving the technical problems

In order to solve the above-described problems, an optical unit with a shake correction function according to the present invention includes: a movable body provided with a camera module; a gimbal mechanism that supports the movable body rotatably about a first axis intersecting an optical axis of the camera module and rotatably about a second axis intersecting the optical axis and the first axis; and a fixed body that supports the movable body via the gimbal mechanism, the gimbal mechanism including: a frame-shaped gimbal spring having a pair of first connecting portions located on both sides of the movable body in the first axial direction, a pair of second connecting portions located on both sides of the movable body in the second axial direction, and four arm portions connecting the first connecting portions and the second connecting portions adjacent in the circumferential direction on the outer peripheral side of the movable body; a first connection mechanism that connects each first connection portion and the movable body to be rotatable about the first axis; and a second connecting mechanism that connects the second connecting portion and the fixed body to be rotatable about the second axis.

According to the present invention, the gimbal springs of the gimbal mechanism that support the movable body rotatably about the first axis and the second axis are frame-shaped, and surround the movable body from the radially outer side. Therefore, the gimbal spring does not have a portion overlapping the movable body from the object side. Thus, it is not necessary to secure an extra space for the gimbal spring on the subject side of the movable body in order to rotate the movable body about the first axis and about the second axis.

In the present invention, the following structure may be adopted: each arm connects a first end portion on the second connecting portion side at an end edge on one side in the optical axis direction of the first connecting portion and a second end portion on the first connecting portion side at an end edge on one side in the optical axis direction of the second connecting portion.

In the present invention, the following structure may be adopted: each arm portion includes a bent portion between the first connecting portion and the second connecting portion. Accordingly, the spring constant of the gimbal spring can be increased as compared with the case where the bending portion is not provided in each arm portion. In other words, by providing the bending portions in the respective arm portions, the spring constant of the gimbal spring can be adjusted.

In the present invention, the following structure may be adopted: the four arm portions are connected to an end edge of the first connecting portion on the object side and an end edge of the second connecting portion on the object side, respectively, and each arm portion includes: a first inclined portion inclined toward the second connecting portion side in the circumferential direction so as to be directed toward the object side from the first end portion of the first connecting portion; a second inclined portion inclined toward the first connecting portion side in the circumferential direction so as to be directed toward the object side from the second end portion of the second connecting portion; and a connecting portion that connects the object-side end portion of the first inclined portion and the object-side end portion of the second inclined portion. If each arm portion includes the first inclined portion and the second inclined portion on the object side of the second connecting portion, the gimbal spring can be prevented or suppressed from protruding further toward the object side than the movable body on the outer peripheral side of the movable body at both end portions in the second axial direction in the gimbal spring when the gimbal spring rotates around the first axis together with the movable body. Further, if each arm portion includes the first inclined portion and the second inclined portion on the object side of the first connecting portion, when the gimbal spring rotates around the second axis together with the movable body, the protrusion of the opposite end portions of the gimbal spring in the first axis direction on the object side than the movable body on the outer peripheral side of the movable body can be prevented or suppressed.

In the present invention, the following structure may be adopted: the camera module includes a camera module body and a lens barrel portion protruding from the camera module body toward a subject side, the movable body includes a holder having a recess opening toward the subject side, the camera module body is fitted into the recess through the opening, and the gimbal spring and the holder are located on a side opposite to the subject side end face of the camera module body. In this way, it is easy to secure a space radially outside the barrel portion of the camera module. Therefore, the degree of freedom in arrangement of the optical unit with the shake correction function is improved when the optical unit with the shake correction function is mounted to various devices or the like.

In the present invention, the following structure may be adopted: the fixed body includes a first stopper portion that defines a rotation angle range of the movable body about the first axis, the first stopper portion being located between the two arm portions extending from the second connecting portion to both sides of the circumferential direction at a predetermined first interval in the optical axis direction, and a second stopper portion that defines a rotation angle range of the movable body about the second axis, the second stopper portion being located between the two arm portions extending from the first connecting portion to both sides of the circumferential direction at a predetermined second interval in the optical axis direction, the second stopper portion being located between the two arm portions extending from the first connecting portion to both sides of the circumferential direction. Thus, when the movable body rotates around the first axis to a predetermined rotation angle, the first stopper comes into contact with the second connecting portion of the gimbal spring that rotates together with the movable body from the front in the rotation direction. Therefore, the rotation angle range of the movable body about the first axis may be defined by the first stopper. When the movable body rotates around the second axis to a predetermined rotation angle, the second stopper portion abuts on the first connecting portion of the gimbal spring that rotates together with the movable body from the front in the rotation direction. Therefore, the rotation angle range of the movable body about the second axis can be defined by the second stopper.

In the present invention, the following structure may be adopted: the first connection mechanism includes a first shaft-side protrusion provided on the first shaft and protruding toward the other side of the movable body and the first connection portion, and a first shaft-side recess that supports a tip end of the first shaft-side protrusion so as to be rotatable about the first shaft, and the second connection mechanism includes a second shaft-side protrusion provided on the second shaft and protruding toward the other side of the fixed body and the second connection portion, and a second shaft-side recess that supports a tip end of the second shaft-side protrusion so as to be rotatable about the second shaft. In this way, the movable body can be supported rotatably about the first shaft and the second shaft by the gimbal mechanism.

In the present invention, the following structure may be adopted: the movable body is supported by the gimbal mechanism via the rotation support mechanism by supporting the movable body rotatably about the optical axis, the gimbal mechanism includes a shaft portion coaxial with the optical axis and protruding from the movable body toward the opposite side of the object, a plate holder supported by the gimbal mechanism and rotatable about the first axis and the second axis, and a bearing mechanism rotatably supporting the shaft portion to the plate holder. Thus, the movable body is rotatable about the optical axis while being rotatable about the first axis and the second axis. Thus, the movable body can be rotated around the optical axis, around the first axis, and around the second axis to perform shake correction. The shaft portion protrudes from the movable body toward the opposite side of the subject, and the plate holder rotatably supports the shaft portion via a bearing mechanism. Therefore, it is not necessary to provide a portion on the object side of the movable body on the board holder. Thus, even when the plate holder is rotated integrally with the movable body about the first axis and about the second axis, it is not necessary to secure an extra space for the plate holder on the object side of the movable body.

In the present invention, the following structure may be adopted: the first connection mechanism includes a first shaft-side protrusion provided on the first shaft and protruding toward the other side of the plate holder and the first connection portion, and a first shaft-side recess that supports a tip end of the first shaft-side protrusion so as to be rotatable about the first shaft, and the second connection mechanism includes a second shaft-side protrusion provided on the second shaft and protruding toward the other side of the fixed body and the second connection portion, and a second shaft-side recess that supports a tip end of the second shaft-side protrusion so as to be rotatable about the second shaft. In this way, the rotation support mechanism for supporting the movable body can be supported rotatably about the first axis and about the second axis by the gimbal mechanism.

Effects of the invention

According to the present invention, the gimbal springs of the gimbal mechanism that support the movable body rotatably about the first axis and the second axis are frame-shaped and are located radially outward of the movable body. Therefore, it is not necessary to secure a space for the gimbal spring on the object side of the movable body in order to rotate the movable body around the first axis and around the second axis.

Drawings

Fig. 1 is a perspective view of an optical unit with a 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 of fig. 1, as viewed from one side in the optical axis direction.

Fig. 3 is an exploded perspective view of the optical unit with the shake correction function of fig. 1, as viewed from the other side in the optical axis direction.

Fig. 4 is a cross-sectional view of an optical unit with a shake correction function cut in the XZ plane.

Fig. 5 is a cross-sectional view of an optical unit with a shake correction function cut in the XY plane.

Fig. 6 is a cross-sectional view of an optical unit with a shake correction function cut in a plane including a first axis and a Z axis.

Fig. 7 is a cross-sectional view of an optical unit with a shake correction function cut out on a plane including the second axis and the Z axis.

Fig. 8 is a perspective view of a gimbal spring.

Fig. 9 is a plan view showing a main part of the optical unit having the shake correction function.

Fig. 10 is a perspective view of the holder, the first magnet, and the second magnet.

Fig. 11 is a perspective view of the stopper housing and the magnetic member.

Description of the reference numerals

1 … an optical unit with a shake correction function; 2 … lenses; 3 … imaging element; 4 … camera module; 4a … camera module body; 4b … barrel portion; 5 … movable body; 6 … rotary support mechanism; 7 … gimbal mechanism; 8 … fixed body; 9 … resilient support members; 10 … magnetic drive mechanism for shake correction; 11 … first shake correction magnetic drive means; 12 … second magnetic drive means for shake correction; 13 … magnetic driving mechanism for rolling correction; 14 … flexible printed substrate; 15 … flexible printed circuit board for power supply; 16 … cage; 16a … end faces of the cage; 20 … cover bottom; 23 … second resilient engaging portions; 24 … second latch portions; 25 … circular holes; 26, … third resilient engaging portions; 27 … snap holes; 30 … frame housing; 31 … rectangular frame portion; 32 … first longitudinal frame portions; 33 … second longitudinal frame portion; 34. 36 … plate portion; 35. 38 … tab; 36a … through holes; 37 … projections; 39 … second shaft side barrel portion; 40 … stopper housing; 40a … body portion; 41 … first housing wall; 42 … second housing wall; 43 … third housing wall; 44 … end plate portion; 45a … first housing projection; 45a … extension; 45b … curvature; 45B … second housing projection; 46 … hook; 46a … opening portions; 47 … grooves; 48 … magnetic part arrangement recesses; 49 … engagement holes; 50 … FPC cover; 52 … hook portions; 53 … locking portions; 54 … weld marks; 56 … second axial side tab; 60 … body portion; 61 … shaft portion; 62 … bearing mechanisms; 63 … plate holders; 64 … to a magnet; 65 … plate holder barrel; 66 … plate retainer ring; 67 … plate holder extension; 68 … first shaft-side recess; 70 … gimbal springs; 71 … first connecting means; 72 … second coupling mechanism; 73 … arm; 74 … first connecting portion; 74a … first end portion; 74b … first central portion; 74c … through holes; 75 … second connecting portion; 75a … second end portion; 75b … second central portion; 77 … first shaft-side barrel portion; 78 … a pair of protrusions; 79 … second shaft side recess; 80 … first shaft side tab; 111 … first magnet; 111a … first side wall surfaces; 111b … second side wall surfaces; 111c … magnetizing the split lines; 112 … first coil; 113 … first magnetic component; 116 … opening portions; 121 … second magnet; 121a … first side wall surfaces; 121b … second side wall surfaces; 121c … magnetizing the split lines; 122 … second coil; 123 … second magnetic component; 131 … a magnet for rolling correction; 131a … first side wall surfaces; 131b …;131c … magnetizing the split lines; 132 … rolling correction coils; 151 … first coil fixing portions; 152 … second coil fixing portions; 153 … third coil fixing portions; 160 … notch portions; 161 … cage bottom; 162 … cage frame portion; 162a … magnet securing area; 162b … magnet securing area; 162c … magnet holding areas; 163 … camera module receiving recess; 163a … holder opening; 164 … recess; 165 … adhesive layer; 166 … opening; 166a … side opening; 166b …;167 … opening portion; 167a … side opening portion; 167b … other side opening portion; 168 … opening portions; 440 … housing locating holes; 610 … steps; 621 … inner ring; 622 … outer ring; 623 … spheres; 624 … guard ring; 710 … first shaft side shaft; 720 … second shaft; 731 … first inclined portions; 732 … second inclined portions; 733 … connecting portion; 734 … curve; 761 … tab; 762 … bends; 763 … straight line portion.

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 the shake correction function of fig. 1 as viewed from one side in the optical axis direction. Fig. 3 is an exploded perspective view of the optical unit 1 with shake correction function of fig. 1, as seen from the other side in the optical axis direction. Fig. 4 is a cross-sectional view of the optical unit 1 with the shake correction function cut in the XZ plane. Fig. 5 is a cross-sectional view of the optical unit 1 with the shake correction function cut in the XY plane. Fig. 6 is a cross-sectional view of the optical unit 1 with the shake correction function cut in a plane including the first axis R1 and the Z axis. Fig. 7 is a cross-sectional view of the optical unit 1 with the shake correction function cut out on a plane including the second axis R2 and the Z axis. Fig. 8 is a perspective view of the gimbal spring 70. Fig. 9 is a plan view showing a main part of the optical unit 1 with a shake correction function.

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. 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 mobile camera mounted on a moving body such as a helmet, a bicycle, a remote control helicopter, or the like. In such an optical apparatus, if shake of the optical apparatus occurs at the time of photographing, a photographed image may be disturbed. 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 a detection device such as a gyroscope, to avoid the tilt of the captured image.

The optical unit 1 with the shake correction function performs shake correction by rotating the camera module 4 around the optical axis L, around a first axis R1 orthogonal to the optical axis L, and around a second axis R2 orthogonal to the optical axis L and the first axis R1. The optical axis L is the optical axis of the lens 2 of the camera module 4. The intersection point of the optical axis L, the first axis R1, and the second axis is located inside the camera module 4.

In the following description, three axes orthogonal to each other are set as an X axis, a Y axis, and a Z axis. The Z axis coincides with the optical axis L of the lens 2. The X-axis is orthogonal to the optical axis L and passes through the intersection of the first axis R1 and the second axis R2. The X axis intersects the first axis R1 and the second axis R2 at an angle of 45 °. The Y axis is orthogonal to the optical axis L and the X axis and passes through the intersection of the first axis R1 and the second axis R2. The Y axis intersects the first axis R1 and the second axis R2 at an angle of 45 °. Therefore, when the plane including the X axis and the Y axis is the XY plane, the first axis R1 and the second axis R2 are located on the XY plane. The first axis R1 and the second axis R2 are inclined 45 ° with respect to the X axis and the Y axis about the Z axis.

In the following description, 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. 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 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. The direction around the Z axis, that is, the direction around the optical axis L is set as the circumferential direction. The radial direction is a direction centered on the Z axis.

As shown in fig. 1 and 2, the optical unit 1 with the shake correction function includes a movable body 5, and the movable body 5 includes a camera module 4, and a rotation support mechanism 6 that supports the movable body 5 rotatably about an optical axis L. Therefore, the movable body 5 can rotate in the rolling direction ROLL around the optical axis L.

The optical unit 1 with the shake correction function includes a gimbal mechanism 7 that rotatably supports the rotation support mechanism 6 about the first axis R1 and rotatably supports the rotation support mechanism about the second axis R2, and a fixed body 8 that supports the movable body 5 via the gimbal mechanism 7 and the rotation support mechanism 6. Therefore, the movable body 5 is supported rotatably about the first axis R1 and rotatably about the second axis R2 via the gimbal mechanism 7.

Here, the movable body 5 can rotate in the YAW direction YAW about the X axis and the PITCH direction PITCH about the Y axis by combining the rotation about the first axis R1 and the rotation about the second axis R2. Therefore, the gimbal mechanism 7 is a rotation support mechanism that supports the movable body 5 via the rotation support mechanism 6 so as to be rotatable about the X axis and about the Y axis. The intersection point of the optical axis L, X axis and the Y axis is the same as the intersection point of the optical axis L, the first axis R1 and the second axis R2, and is located inside the movable body 5.

The optical unit 1 with the shake correction function includes a flexible printed board 14 connected to the movable body 5. As shown in fig. 4 and 5, the flexible printed board 14 is led out in the +x direction from the movable body 5. The flexible printed board 14 is led out of the fixed body 8, and is connected to a board or the like of an optical device on which the optical unit 1 with a shake correction function is mounted via a connector not shown.

As shown in fig. 5, the optical unit 1 with the shake correction function includes a shake correction magnetic drive mechanism 10 that rotates the movable body 5 about the first axis R1 and about the second axis R2. The magnetic driving mechanism for shake correction 10 includes a first magnetic driving mechanism for shake correction 11 that generates a driving force about the X axis on the movable body 5, and a second magnetic driving mechanism for shake correction 12 that generates a driving force about the Y axis on the movable body 5. As shown in fig. 2, 3, and 5, the first shake correction magnetic drive mechanism 11 includes a first magnet 111 and a first coil 112 arranged in the-Y direction of the movable body 5. The second shake correction magnetic drive mechanism 12 includes a second magnet 121 and a second coil 122 arranged in the-X direction of the movable body 5.

As shown in fig. 2, 3, and 5, the optical unit 1 with the shake correction function includes a magnetic driving mechanism 13 for roll correction that rotates the movable body 5 around the optical axis L. The magnetic driving mechanism 13 for rolling correction includes a rolling correction magnet 131 and a rolling correction coil 132 arranged in the +y direction of the movable body 5. The optical unit 1 with the shake correction function includes a flexible printed board 15 for supplying power to the shake correction magnetic drive mechanism 10 and the roll correction magnetic drive mechanism 13. The flexible printed board 15 is mounted on the fixed body 8.

(Movable body)

Fig. 10 is a perspective view of the holder, the first magnet, and the second magnet. As shown in fig. 2 to 5, the movable body 5 includes a camera module 4 and a holder 16 for holding the camera module 4. The camera module 4 includes a camera module body 4a having an octagonal shape when viewed in the Z-axis direction, and a cylindrical barrel portion 4b protruding in the +z direction from the camera module body 4 a. The lens 2 is held by the barrel 4b (see fig. 4). The optical axis L of the camera module 4 is the optical axis of the lens 2.

The holder 16 is made of magnetic metal. The holder 16 includes a holder bottom 161 for supporting the camera module 4 in the-Z direction and a holder frame 162 (frame) standing in the +z direction from the outer periphery of the holder bottom 161. As shown in fig. 2 and 10, the holder frame 162 includes a notch 160 that opens in the +x direction.

The camera module body 4a is accommodated in a camera module accommodating recess 163 partitioned by the holder bottom 161 and the holder frame 162. The camera module accommodating recess 163 includes a holder opening 163a oriented in the +z direction, and the camera module main body 4a is fitted into the camera module accommodating recess 163 from the +z direction. The flexible printed board 14 is connected to the imaging element 3 disposed inside the camera module 4, and is led out in the +x direction of the movable body 5 through the notch 160.

The holder bottom 161 is plate-shaped. When the camera module 4 is held to the holder 16, the end face in the-Z direction of the holder bottom 161, that is, the end face 16a in the-Z direction of the holder 16, is perpendicular to the optical axis L. A shaft portion 61 protruding in the-Z direction is provided at the center of the holder bottom 161. The shaft portion 61 is formed on the holder 16 by a hemming process. When the camera module 4 is held to the holder 16, the shaft portion 61 is coaxial with the optical axis L.

As shown in fig. 10, a first magnet 111 (a magnet for correcting shake) is fixed to the outer surface of the holder frame 162 in the-Y direction. A second magnet 121 (shake correction magnet) is fixed to the outer surface of the holder frame 162 in the-X direction. Further, a rolling correction magnet 131 is fixed to the outer surface of the holder frame 162 in the +y direction.

The first magnet 111 has a rectangular parallelepiped shape, and includes a pair of first side wall surfaces 111a extending in the Z-axis direction on both sides in the circumferential direction and a pair of second side wall surfaces 111b extending in the circumferential direction on both sides in the Z-axis direction. The second side wall surface 111b located in the-Z direction of the pair of second side wall surfaces 111b is located at the same height position in the Z-axis direction as the end surface 16a of the holder 16 in the-Z direction. The first magnet 111 is polarized and magnetized to two poles in the Z-axis direction. Therefore, the magnetization split line 111c of the first magnet 111 extends in the circumferential direction.

The second magnet 121 is the same member as the first magnet 111. The second magnet 121 has a rectangular parallelepiped shape, and includes a pair of first side wall surfaces 121a extending in the Z-axis direction on both sides in the circumferential direction and a pair of second side wall surfaces 121b extending in the circumferential direction on both sides in the Z-axis direction. The second side wall surface 121b located in the-Z direction of the pair of second side wall surfaces 121b is located at the same height position in the Z-axis direction as the end surface 16a of the holder 16 in the-Z direction. The second magnet 121 is polarized and magnetized to two poles in the Z-axis direction. Therefore, the magnetization split line 121c of the second magnet 121 extends in the circumferential direction.

Here, a plurality of concave portions 164 are provided in the magnet fixing region 162a overlapping the first magnet 111 on the outer surface of the holder frame 162 in the-Y direction. An adhesive layer 165 is interposed between the magnet fixing region 162a and the first magnet 111. In this example, each of the plurality of concave portions 164 is a groove extending in the Z-axis direction in a straight line. The width of each groove was about 0.03 mm. The +z-direction end of the recess 164 reaches the outside of the magnet fixing region 162a on the-Y-direction outer side surface of the holder frame 162. Therefore, when the first magnet 111 is disposed in the magnet fixing region 162a, the end of the recess 164 in the +z direction is located closer to the +z direction than the first magnet 111.

The frame portion of the holder frame 162 in the-Y direction includes openings 166 extending along the first side wall surfaces 111a on both sides in the circumferential direction of the first magnet 111. More specifically, the holder frame 162 includes, as the opening 166, one side opening 166a and the other side opening 166b, the one side opening 166a extending along one of the first side walls 111a at a position adjacent to the other first side wall 111a in the circumferential direction of the first magnet 111, and the other side opening 166b extending along the other first side wall 111a at a position adjacent to the other first side wall 111 a. The one-side opening 166a and the other-side opening 166b extend in a straight line in the Z-axis direction with a constant width dimension D1. The magnetization split line 111c of the first magnet 111 overlaps the openings 166a and 166b when viewed in the circumferential direction.

Similarly, a plurality of concave portions 164 are provided in the magnet fixing region 162b overlapping the second magnet 121 on the outer surface of the holder frame 162 in the-X direction. In addition, an adhesive layer 165 is interposed between the magnet fixing region and the second magnet 121. The plurality of concave portions 164 are grooves extending in the Z-axis direction in a straight line. The +z-direction end of the recess 164 reaches the outside of the magnet fixing region 162b on the-X-direction outer side surface of the holder frame 162. Therefore, when the second magnet 121 is disposed in the magnet fixing region 162b, the end of the recess 164 in the +z direction is located closer to the +z direction than the second magnet 121.

The frame portion of the holder frame 162 in the-X direction includes openings 167 extending along the first side wall surfaces 121a on both sides in the circumferential direction of the second magnet 121. More specifically, the holder frame 162 includes, as the opening 167, one side opening 167a and the other side opening 167b, the one side opening 167a extending along one of the first side walls 121a at a position adjacent to the other first side wall 121a in the circumferential direction of the second magnet 121, and the other side opening 167b extending along the other first side wall 121a at a position adjacent to the other first side wall 121 a. The one-side opening 167a and the other-side opening 167b extend in a straight line in the Z-axis direction with a constant width dimension D1. The magnetization split line 121c of the second magnet 121 overlaps the openings 167a and 167b when viewed in the circumferential direction.

Next, the roll correction magnet 131 has a rectangular parallelepiped shape, and includes a pair of first side surfaces 131a extending in the circumferential direction on both sides in the Z-axis direction, and a pair of second side surfaces 131b extending in the Z-axis direction on both sides in the circumferential direction. Of the pair of first side wall surfaces 131a, a first side surface located in the-Z direction is located closer to the-Z direction than the-Z direction end surface 16a of the holder 16. The rolling correction magnet 131 is polarized and magnetized in the circumferential direction into two poles. Therefore, the magnetization split line 131c of the roll correction magnet 131 extends in the Z-axis direction.

A plurality of concave portions 164 are provided in the magnet fixing region 162c overlapping the rolling correction magnet 131 on the outer surface of the holder frame 162 in the +y direction. An adhesive layer 165 is interposed between the magnet fixing region 162c and the rolling correction magnet 131. Each of the plurality of concave portions 164 is a groove extending linearly in the Z-axis direction.

The frame portion in the +y direction of the holder frame portion 162 includes an opening 168 extending along the first side wall surface 131a in the +z direction at a position adjacent to the rolling correction magnet 131 in the +z direction. The opening 168 extends linearly in the circumferential direction with a constant width dimension D2. The magnetization polarization line 131c of the roll correction magnet 131 overlaps the opening 168 when viewed in the Z-axis direction. The +z direction end of the concave portion 164 reaches the opening 168. Thus, the recess 164 and the opening 168 communicate.

Here, when the first magnet 111 is fixed to the holder 16, a positioning jig is inserted into the opening 116, and the first magnet 111 is attracted to the holder frame 162 while being in contact with the jig. The second side wall surface 111b in the-Z direction of the first magnet 111 and the end surface 16a in the-Z direction of the holder 16 are arranged on the same plane by a jig or the like. Thus, the first magnet 111 is attracted to the holder 16 while being positioned in the circumferential direction and the Z-axis direction. Next, an adhesive is applied to the boundary portion between the outer surface of the holder frame 162 and the +z direction of the first magnet 111. Thus, the adhesive enters the recess 164 from the +z-direction end of the recess 164 in the +z-direction with respect to the first magnet 111, and reaches the magnet fixing region 162a. Accordingly, an adhesive layer 165 is formed between the holder frame 162 and the first magnet 111. The first magnet 111 is fixed to the outer surface of the holder frame 162 via an adhesive layer 165.

When the rolling correction magnet 131 is fixed to the holder 16, a positioning jig is inserted into the opening 168, and the rolling correction magnet 131 is attracted to the holder frame 162 while being in contact with the jig. Thus, the rolling correction magnet 131 is held by the holder 16 in a state of being positioned in the Z-axis direction. Next, an adhesive is applied to the opening edge of the opening 168 formed in the +z direction of the roll correction magnet 131. Thus, the adhesive enters the recess 164 from the +z-direction end of the recess 164 communicating with the opening 168, and reaches the magnet fixing region 162c. Therefore, an adhesive layer 165 is formed between the holder frame 162 and the rolling correction magnet 131. The rolling correction magnet 131 is fixed to the outer surface of the holder frame 162 via an adhesive layer 165.

(fixed body)

Fig. 11 is a perspective view of the frame housing, the stopper housing, the first magnetic member, and the second magnetic member. As shown in fig. 1 to 5, the fixed body 8 includes a cover bottom 20 covering the movable body 5 and the flexible printed board 14 in the-Z direction, a frame case 30 fixed to the cover bottom 20 in the +z direction and surrounding the movable body 5 in the diagonal direction, and a stopper case 40 surrounding the frame case 30 and the outer periphery side of the movable body 5. The cover bottom 20, the frame housing 30, and the stopper housing 40 are made of a non-magnetic metal.

The cover bottom 20 is a sheet metal member having a plate thickness of 0.15mm, for example, and is manufactured by press working. The frame case 30 is a sheet metal member having a plate thickness of 0.30mm, for example, and is manufactured by press working. The frame housing 30 is thicker than the cover bottom 20. The stopper housing 40 has the same plate thickness as the cover bottom 20, and the stopper housing 40 is manufactured by press-drawing. The stopper housing 40 surrounds the movable body 5 from three directions of-X direction, -Y direction and +y direction.

As shown in fig. 2, 3, and 5, the fixed body 8 includes an FPC cap 50 surrounding the outer periphery of the flexible printed board 14 drawn in the +x direction from the movable body 5. The FPC cap 50 is made of resin and is fixed to the cap bottom 20 from the +z direction. The FPC cap 50 has a hook 52 (see fig. 3 and 5) fitted into the rectangular frame 31 of the frame housing 30 at an end in the-X direction. By fitting the hook 52 into the rectangular frame 31 from the +z direction, the end of the fpc cap 50 in the-X direction is locked to the frame housing 30. Further, locking portions 53 are formed on the side surface in the-Y direction and the side surface in the +y direction of the end portion in the-X direction of the FPC cap 50, respectively. The stopper housing 40 has an engagement hole 49 at an end in the +x direction, which engages with the engagement portion 53. The stopper housing 40 has an engagement hole 27 on a side surface in the-X direction, and the engagement hole 27 engages with a third elastic engagement portion 26 at two positions rising in the +z direction from an edge in the-X direction of the cover bottom 20 (see fig. 3).

As shown in fig. 5, the flexible printed substrate 15 is wound around in the circumferential direction along the inner surface of the stopper housing 40. As shown in fig. 2, 3, and 5, the flexible printed board 15 includes a first coil fixing portion 151 extending in the X-axis direction along the side surface of the stopper housing 40 in the-Y direction, a second coil fixing portion 152 extending in the Y-axis direction along the side surface of the stopper housing 40 in the-X direction, and a third coil fixing portion 153 extending in the X-axis direction along the side surface of the stopper housing 40 in the +y direction. The first coil fixing portion 151, the second coil fixing portion 152, and the third coil fixing portion 153 are held on the inner peripheral side of the stopper housing 40.

The first coil 112 of the first magnetic driving mechanism 11 for shake correction is fixed to the first coil fixing portion 151, and the second coil 122 of the second magnetic driving mechanism 12 for shake correction is fixed to the second coil fixing portion 152. The roll correction coil 132 is fixed to the third coil fixing portion 153. The first coil 112, the second coil 122, and the roll correction coil 132 are electrically connected to the flexible printed board 15. The first coil 112, the second coil 122, and the roll correction coil 132 are fixed to the stopper housing 40 via the flexible printed board 15.

As shown in fig. 2, 3, 5, and 11, the stopper housing 40 includes a main body portion 40A surrounding the movable body 5 in three directions and an end plate portion 44 extending inward from an edge of the main body portion 40A in the +z direction. The main body 40A includes a first housing wall 41 extending in the X-axis direction in the-Y direction of the movable body 5, a second housing wall 42 extending in the Y-axis direction in the-X direction of the movable body 5, and a third housing wall 43 extending in the X-axis direction in the +y direction of the movable body 5. The end plate portion 44 includes a first housing protrusion 45A (second stopper portion) protruding inward from a diagonal position in the first axis R1 direction and a second housing protrusion 45B (first stopper portion) protruding inward from a diagonal position in the second axis R2 direction. The first housing projection 45A includes an extension portion 45A extending from the end plate portion 44 toward the inner peripheral side and a bending portion 45b bending and extending in the-Z direction from an end edge of the extension portion on the inner peripheral side. The end plate portion 44 includes housing positioning holes 440 for positioning with the frame housing 30 at two portions on the first axis R1 and at two portions on the second axis R2, respectively.

The stopper housing 40 includes a hook 46 (see fig. 2, 3, and 4) for locking the edge of the flexible printed board 15 in the-Z direction and a groove 47 (see fig. 3) for locking the edge of the flexible printed board 15 in the +z direction. The hooks 46 are formed at one position at the center in the circumferential direction of the first, second, and

third housing walls

41, 42, 43, respectively. The grooves 47 are formed at two positions on the-Y-direction edge, the-X-direction edge, and the +y-direction edge of the end plate 44, respectively. The first coil fixing portion 151, the second coil fixing portion 152, and the third coil fixing portion 153 are positioned by the-Z-direction edge being locked to the hook 46 and the +z-direction edge being locked to the groove 47, and are fixed to the stopper housing 40 by an adhesive.

As shown in fig. 3 and 11, the first, second, and

third housing walls

41, 42, 43 each have a magnetic member arrangement recess 48 at the center in the circumferential direction of the outer side surface. The magnetic member arrangement concave portion 48 extends linearly in the optical axis direction with a constant width.

As shown in fig. 5 and 11, the first magnetic member 113 is disposed in the magnetic member disposition recess 48 provided in the first housing wall 41. As shown in fig. 11, the first magnetic member 113 has a rectangular plate shape, and includes two parallel sides extending linearly in the Z-axis direction. The length M of the first magnetic member 113 in the Z-axis direction is shorter than the length N of the magnetic member arrangement recess 48 in the Z-axis direction. In addition, the length M of the first magnetic member 113 in the Z-axis direction is longer than the length 0 of the first magnet shown in fig. 10 in the Z-axis direction. The thickness of the first magnetic member 113 is equal to or less than the depth of the magnetic member arrangement recess 48. Therefore, when the first magnetic member 113 is disposed in the magnetic member disposition concave portion 48, the first magnetic member 113 does not protrude from the magnetic member disposition concave portion 48 to the outer peripheral side.

A weld mark 54 for fixing the first magnetic member 113 to the first housing wall 41 is provided in the magnetic member arrangement recess 48. That is, the first magnetic member 113 is fixed to the first housing wall 41 by welding. The first magnetic member 113 constitutes a magnetic spring for positioning the movable body 5 to the origin position in shake correction around the X axis together with the first magnet 111 held in the movable body 5.

In addition, a second magnetic member 123 is disposed in the magnetic member disposition recess 48 provided in the second housing wall 42. The second magnetic member 123 is the same member as the first magnetic member 113. The second magnetic member has a rectangular plate shape and includes two parallel sides extending in a straight line along the Z-axis direction. The length M of the second magnetic member in the Z-axis direction is shorter than the length N of the magnetic member arrangement recess 48 in the Z-axis direction. In addition, the length M of the second magnetic member in the Z-axis direction is longer than the length O of the second magnet in the Z-axis direction. The thickness of the second magnetic member 123 is equal to or less than the depth of the magnetic member arrangement recess 48. Therefore, when the second magnetic member 123 is disposed in the magnetic member disposition concave portion 48, the second magnetic member 123 does not protrude from the magnetic member disposition concave portion 48 to the outer peripheral side.

A weld mark 54 for fixing the second magnetic member 123 to the second housing wall 42 is provided in the magnetic member arrangement recess 48. That is, the second magnetic member 123 is fixed to the second housing wall 42 by welding. The second magnetic member 123 constitutes a magnetic spring for positioning the movable body 5 to the origin position in shake correction around the Y axis together with the second magnet 121 held on the movable body 5.

Here, as shown in fig. 3, the hook 46 is a cut-and-raised portion that cuts the bottom of the magnetic member arrangement recess 48 toward the inner peripheral side. Therefore, a portion of the bottom of the magnetic member arrangement recess 48, where the hook 46 is cut up, is an opening 46a. The opening 46a is used as an adhesive application hole for flowing the adhesive for fixing into between the flexible printed substrate 15 and the stopper housing 40 after positioning the flexible printed substrate 15 to the stopper housing 40.

As shown in fig. 2 and 3, the frame case 30 includes a rectangular frame portion 31 that abuts the cover bottom 20 in the +z direction, a pair of first vertical frame portions 32 that stand up in the +z direction from the diagonal position in the first axis R1 direction of the rectangular frame portion 31, and a pair of second vertical frame portions 33 that stand up in the +z direction from the diagonal position in the second axis R2 direction of the rectangular frame portion 31. The first and second

vertical frame portions

32 and 33 include second locking portions 24, and the second locking portions 24 lock the second elastic engagement portions 23 provided at four positions of the cover bottom 20 in the diagonal position in the first axis R1 direction and in the diagonal position in the second axis R2 direction. The frame housing 30 is fixed to the cover bottom 20 by locking the second elastic locking portion 23 to the second locking portion 24.

As shown in fig. 2 and 3, the pair of first vertical frame portions 32 includes a plate portion 34 extending in the +z direction and two protrusions 35 protruding from edges on both sides of the plate portion 34 in the width direction. The pair of second vertical frame portions 33 includes a plate portion 36 extending in the +z direction, a pair of protrusions 37 protruding from substantially the center in the Z axis direction of the edges on both sides in the width direction of the plate portion 36, and four protrusions 38 protruding from the edges on both sides in the width direction of the plate portion 36 in the +z direction and the-Z direction of each protrusion 37, respectively. The

protrusions

35, 38 extend in the Y-axis direction or the X-axis direction along the flexible printed board 15 fixed to the inner surface of the stopper housing 40.

As shown in fig. 1 and 6, the pair of first vertical frame portions 32 insert the front ends of the plate portions 34 in the +z direction into the case positioning holes 440 of the stopper case 40. As shown in fig. 1 and 7, the pair of second vertical frame portions 33 insert the front ends of the plate portions 36 in the +z direction into the case positioning holes 440 of the stopper case 40. In the present embodiment, the tips of the

plate portions

34, 36 are fixed to the stopper housing 40 by welding.

As shown in fig. 7, each of the second vertical frame portions 33 is provided with a second shaft side protrusion 56 protruding toward the movable body 5 side on the second shaft R2. Specifically, each of the second vertical frame portions 33 includes a through hole 36a penetrating the plate portion 36 in the second axis R2 direction and a second axis side tubular portion 39 protruding inward from an opening edge of the through hole 36a of the plate portion 36 in the second axis R2 direction. A cylindrical second shaft 720 is held in the through hole 36a and the second shaft-side tube 39. The inner peripheral end portion of the second shaft 720 is a second shaft protrusion 56 protruding from the plate 36 toward the movable body 5. The tip portion of the second axial protrusion 56 has a hemispherical surface. As will be described later, the second shaft side projection 56 constitutes a second connection mechanism 72 of the gimbal mechanism 7. Here, the pair of projections 37 are provided on both sides in the circumferential direction of the second shaft side tube portion 39.

(rotation supporting mechanism)

As shown in fig. 4, 6, and 7, the rotation support mechanism 6 includes a shaft portion 61 protruding in the-Z direction from the movable body 5, a plate holder 63 supported by the gimbal mechanism 7 and rotatable about a first axis R1 and about a second axis R2, and a bearing mechanism 62 rotatably supporting the shaft portion 61 to the plate holder 63. As shown in fig. 3, the rotation support mechanism 6 includes a suction magnet 64 fixed to the plate holder 63 and sucking the holder to the plate holder 63 side. The shaft portion 61 of the movable body 5 is coaxial with the optical axis L.

The plate holder 63 is made of a nonmagnetic metal. As shown in fig. 6, the plate holder 63 includes a plate holder cylindrical portion 65 surrounding the shaft portion 61, a plate holder annular portion 66 extending from an end portion in the +z direction of the plate holder cylindrical portion 65 to the outer peripheral side, and a pair of plate holder extending portions 67 protruding from the plate holder annular portion 66 to both sides in the first axis R1 direction and bent in the +z direction. The bearing mechanism 62 is a bearing. The bearing mechanism 62 includes an inner ring 621 fixed to a stepped portion 610 provided on the outer peripheral surface of the shaft portion 61, an outer ring 622 surrounding the outer peripheral side of the inner ring 621, a ball 623 rolling between the inner ring 621 and the outer ring 622, and a ring-shaped retainer 624 holding the ball 623 in a rolling state. The attracting magnet 64 is annular and fixed to a surface of the plate holder annular portion 66 opposite to the holder 16. The attracting magnet 64 is thinner than the bearing mechanism 62 in the Z-axis direction. The attracting magnet 64 is magnetized to a plurality of poles in the circumferential direction.

The plate holder annular portion 66 is opposed to the end face 16a of the holder 16 in the-Z direction with a constant gap therebetween in a state where the shaft portion 61 and the plate holder 63 are connected via the bearing mechanism 62. The attracting magnet 64 is located radially outward of the bearing mechanism 62, and is located inward of the bearing mechanism 62 when viewed from a direction orthogonal to the Z axis.

As shown in fig. 6, the front end portions of the pair of plate holder extending portions 67 extend in the Z-axis direction on the outer peripheral side of the movable body 5. The front end portion of each plate holder extension 67 includes a first shaft-side recess 68 recessed inward on the first shaft R1. The first shaft-side concave portion 68 has a concave curved surface. As will be described later, the first shaft-side concave portion 68 constitutes a first connection mechanism 71 of the gimbal mechanism 7.

(elastic supporting Member)

As shown in fig. 2, the cover bottom 20 includes a circular hole 25 centered on the optical axis L. A cylindrical elastic support member 9 is disposed at two positions opposed to each other in the direction of the first axis R1 through the circular hole 25. The elastic support member 9 is made of a low-hardness rubber having a rubber hardness of 10 or less. The elastic support member 9 is made of, for example, a silicone rubber having a rubber hardness of 1 to 3. Here, the elastic support member 9 receives the load of the movable body 5 and the rotation support mechanism 6 via the plate holder 63 of the rotation support mechanism 6 disposed at the bottom of the movable body 5 (see fig. 6). The elastic support member 9 is configured to have a compression ratio of about 10% in the Z-axis direction between the plate holder 63 and the cover bottom 20 by applying a load to the movable body 5 and the rotary support mechanism 6. The elastic support member 9 is fixed to the cover bottom 20, but not to the board holder 63.

The elastic support members 9 are symmetrically arranged with respect to the optical axis L and fixed to the cover bottom 20. In the present embodiment, since the center of gravity of the movable body 5 is located on the optical axis, the elastic support members 9 are symmetrically arranged with respect to the center of gravity of the movable body 5. Therefore, by receiving the load of the movable body 5 and the rotation support mechanism 6 by the elastic support member 9, the positional accuracy when the movable body 5 is positioned to the origin position of shake correction can be improved. In addition, since the low-hardness rubber is a vibration-proof material, impact resistance can be improved when an impact due to dropping or the like is applied.

(Universal frame mechanism)

As shown in fig. 2 to 5, the gimbal mechanism 7 includes a gimbal spring 70, a first connection mechanism 71, and a second connection mechanism 72. The first connection mechanism 71 connects the gimbal spring 70 and the board holder 63 to be rotatable about the first axis R1. The second connection mechanism 72 connects the gimbal spring 70 and the fixed body 8 to be rotatable about the second axis R2. In this example, a second connection mechanism 72 connects the gimbal spring 70 and the frame housing 30. When the gimbal mechanism 7 is configured, the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6. Thereby, the movable body 5 can rotate about an intersection point at which the optical axis L, the first axis R1, and the second axis R2 intersect.

The gimbal spring 70 is a plate spring made of metal. The gimbal spring 70 is frame-shaped and surrounds the movable body 5 from the outer peripheral side. As shown in fig. 8, the gimbal spring 70 includes a pair of first connecting portions 74 located on both sides in the first axis R1 direction of the movable body 5, a pair of second connecting portions 75 located on both sides in the second axis R2 direction of the movable body 5, and four arm portions 73 connecting the first connecting portions 74 and the second connecting portions 75 adjacent in the circumferential direction on the outer peripheral side of the movable body 5.

Each of the first connecting portions 74 has a plate shape, and the thickness direction thereof is oriented in the first axis R1 direction. Each of the second connection portions 75 is plate-shaped, and has a thickness direction directed in the second axis R2 direction. Each arm 73 connects a first end portion 74a on the side of the second connecting portion 75 at the +z-direction end edge of the first connecting portion 74 and a second end portion 75a on the side of the first connecting portion 74 at the +z-direction end edge of the second connecting portion 75. Here, the two arm portions 73 extending from the respective first connecting portions 74 to both sides in the circumferential direction are separated in the circumferential direction. Therefore, each first connecting portion 74 includes a first central portion 74b where the arm portion 73 is not connected at the center of the end edge in the +z direction in the circumferential direction. Similarly, two arm portions 73 extending from the respective second connecting portions 75 to both sides in the circumferential direction are separated in the circumferential direction. Therefore, each second connecting portion 75 includes a second central portion 75b where the arm portion 73 is not connected at the center of the end edge in the +z direction in the circumferential direction.

Each arm 73 includes: a first inclined portion 731 that is inclined along the second connection portion 75 side of the perimeter Xiang Xiangdi so as to face the +z direction from the first end portion 74a of the first connection portion 74; a second inclined portion 732 that is inclined along the side of the connection portion 74 of the perimeter Xiang Xiangdi so as to face the +z direction from the second end portion 75a of the second connection portion 75; and a connection portion 733 that connects an end portion of the first inclined portion 731 in the +z direction and an end portion of the second inclined portion 732 in the +z direction.

The connecting portions 733 of the three arm portions 73 located in the-X direction, -Y direction, and +y direction of the movable body 5 among the four arm portions 73 extend in the circumferential direction between the +z-direction end portion of the first inclined portion 731 and the +z-direction end portion of the second inclined portion 732, respectively. At a central portion in the circumferential direction of the connecting portion 733 of the three arm portions 73, a curved portion 734 recessed in the-Z direction is provided.

The connecting portion 733 of the arm 73 located in the +x direction of the movable body 5 among the four arm portions 73 has a shape that avoids interference with the flexible printed board 14 extending from the movable body 5 in the +x direction. Specifically, the connection portion 733 includes a pair of protruding portions 761 that are bent and extended in the +x direction from the +z-direction end portion of the first inclined portion 731 and the +z-direction end portion of the second inclined portion 732, a pair of bent portions 762 that are bent and extended in the Z-axis direction from the +x-direction front ends of the protruding portions 761, and a straight portion 763 that extends in a straight line in the Y-axis direction and connects the-Z-direction front ends of the pair of bent portions 762. Further, as long as interference with the flexible printed board 14 does not occur, the connection portion 733 of the arm portion 73 located in the +x direction of the movable body 5 may be set to extend in the circumferential direction as the connection portion 733 of the other arm portion 73.

As shown in fig. 6, each first connecting portion 74 is provided with a first shaft-side protrusion 80 protruding toward the movable body 5 side on the first shaft R1. Specifically, the first connection portion 74 includes a through hole 74c penetrating along the first axis R1 and a first axis-side tube portion 77 protruding from an opening edge of the through hole 74c of the first connection portion 74 toward the outer peripheral side. A cylindrical first shaft-side shaft 710 is held in the through hole 74c and the first shaft-side tube portion 77. The inner peripheral end portion of the first shaft 710 is a first shaft protrusion 80 protruding radially inward from the first shaft tube 77. The first shaft protrusion 80 has a hemispherical surface at the tip portion on the inner peripheral side. As shown in fig. 8, a pair of protrusions 78 protruding inward on both sides of the first shaft-side tube portion 77 in the circumferential direction are provided in the pair of first connection portions 74.

The first connection mechanism 71 is configured by a hemispherical surface provided at the front end portion of the first shaft-side protrusion 80 being in point contact with a concave curved surface of the first shaft-side recess 68 provided at the front end of the plate holder extension 67. When the first connection mechanism 71 is constituted, the board holder 63 is supported by the gimbal spring 70 in a rotatable state about the first axis R1. In a state where the first shaft-side protrusion 80 is supported by the first shaft-side concave portion 68, the pair of plate holder extending portions 67 flex toward the inner peripheral side, and elastically contact the first shaft-side protrusion 80 from the inner peripheral side.

When the first connection mechanism 71 is configured, the rotation support mechanism 6 is supported by the gimbal mechanism 7 so as to be rotatable about the first axis R1. When the first connection mechanism 71 is configured, the plate holder extension 67 is arranged between the pair of projections 78 as shown in fig. 5. The pair of protrusions 78 are anti-escape portions that restrict escape of the plate holder extension 67 from the first connecting portion 74 in the Z-axis direction.

As shown in fig. 5 and 7, the pair of second connection portions 75 each include a second shaft side concave portion 79 recessed inward in the second shaft R2. The second shaft side concave portion 79 has a concave curved surface. The second connection mechanism 72 is configured by the hemispherical surface of the second shaft side protrusion 56 provided in each of the second vertical frame portions 33 of the frame housing 30 being in point contact with the concave curved surface of the second shaft side concave portion 79. When the second connection mechanism 72 is configured, the gimbal spring 70 is supported by the fixed body 8 in a rotatable manner about the second axis R2. In a state where the second shaft-side concave portion 79 is supported by the second shaft-side convex portion 56, the pair of second connection portions 75 are bent toward the inner peripheral side, and elastically contact the second shaft-side convex portion 56 from the inner peripheral side.

When the second connection mechanism 72 is configured, the gimbal mechanism 7 is supported by the fixed body 8 so as to be rotatable about the second axis R2. When the second connection mechanism 72 is configured, as shown in fig. 5, the distal ends of the pair of second connection portions 75 are disposed between the pair of protrusions 37 provided in the second vertical frame portion 33 of the frame housing 30. The pair of protrusions 37 are anti-disengagement portions that restrict disengagement of the second connecting portion 75 from the second vertical frame portion 33 in the +z direction.

Here, in a state where the movable body 5 and the fixed body 8 are connected via the gimbal mechanism 7 and the rotation support mechanism 6, the main body 40A of the stopper housing 40, which is the main body 40A of the fixed body 8, is located radially outward of the movable body 5 and the gimbal spring 70. As shown in fig. 4, 6, and 7, the gimbal spring 70 and the holder 16 are located on the radially outer side of the camera module body 4a at a position closer to the positive Z-direction end face of the camera module body 4a than the positive Z-direction end face. The fixed body 8 is located at a position closer to the positive Z direction than the positive Z direction end surface of the camera module body 4a on the radial outside of the movable body 5. Therefore, a part of the movable body 5 and the gimbal mechanism 7 in the +z direction protrudes from the stopper housing 40 in the +z direction.

(magnetic drive mechanism for shake correction and magnetic drive mechanism for roll correction)

As shown in fig. 5, when the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, the first magnet 111 fixed to the side surface of the movable body 5 in the-Y direction and the first coil 112 fixed to the stopper housing 40 are opposed to each other in the radial direction. Thus, the first magnet 111 and the first coil 112 constitute the first shake correction magnetic drive mechanism 11. Thus, by supplying power to the first coil 112, the movable body 5 rotates about the X axis. Here, the distance E1 separating the first magnet 111 and the first coil 112 in the Y-axis direction is shorter than the width D1 (see fig. 10) of the opening 166 provided near the holder frame 162 in the circumferential direction of the first magnet 111.

When the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, the second magnet 121 fixed to the side surface of the movable body 5 in the-X direction and the second coil 122 fixed to the stopper housing 40 are opposed to each other in the radial direction. Thus, the second magnet 121 and the second coil 122 constitute the second shake correction magnetic drive mechanism 12. Accordingly, by supplying power to the second coil 122, the movable body 5 rotates around the Y axis. Here, the distance E2 separating the second magnet 121 and the second coil 122 in the X-axis direction is shorter than the width D1 (see fig. 10) of the opening 167 provided near the second magnet 121 in the circumferential direction at the holder frame 162.

When the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, the rolling correction magnet 131 fixed to the +y-direction side surface of the movable body 5 and the rolling correction coil 132 fixed to the stopper housing 40 are opposed to each other in the radial direction. Thus, the rolling correction magnet 131 and the rolling correction coil 132 constitute the rolling correction magnetic driving mechanism 13. Accordingly, by supplying power to the roll correction coil 132, the movable body 5 rotates around the optical axis L. As shown in fig. 3 and 10, a distance E3 separating the first magnet 111 and the first coil 112 in the Y-axis direction is shorter than a width dimension D2 of the opening 168 provided in the retainer frame 162 beside the +z direction of the rolling correction magnet 131 in the Z-axis direction.

When the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, the magnetic member arrangement recess 48 of the stopper housing 40 overlaps the magnetization split line 111c of the first magnet 111 when viewed in the radial direction. Similarly, the second magnetic member 123 disposed in the magnetic member disposition recess 48 overlaps the magnetization split line 121c of the second magnet 121. In a state where power is not supplied to the first coil 112 and the second coil 122, the posture of the movable body 5 is a reference posture in which the optical axis of the camera module 4 coincides with the Z axis serving as the reference axis by the magnetic attraction force acting between the first magnetic member 113 and the first magnet 111 and the magnetic attraction force acting between the second magnetic member 123 and the second magnet 121.

When the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, as shown in fig. 6, the first housing protrusion 45A protruding inward from the diagonal position in the first axis R1 direction is located between the two arm portions 73 extending from the first connecting portion 74 of the gimbal spring 70 to both sides in the circumferential direction on the stopper housing 40. The first housing protrusion 45A is opposed to the first central portion 74b of the +z-direction end edge of the first connecting portion 74 with a predetermined first interval Q1 therebetween in the Z-axis direction. The bent portion 45b of the first housing protrusion 45A faces the holder 16 with a slight gap therebetween in the first axial direction. Further, in the stopper housing 40, the second housing protrusion 45B protruding to the inner peripheral side from the diagonal position in the second axis R2 direction is located between the two arm portions 73 extending to both sides in the circumferential direction from the second connecting portion 75. The second housing projection 45B is opposed to the second central portion 75B of the +z-direction end edge of the second connecting portion 75 with a predetermined second interval Q2 therebetween in the Z-axis direction.

Here, the pair of second housing protrusions 45B define a rotation angle range of the movable body 5 about the first axis R1. That is, when the movable body 5 rotates to a predetermined rotation angle around the first axis R1, the second housing protrusions 45B come into contact with the second connection portions 75 of the gimbal springs 70 that rotate together with the movable body 5 from the front in the rotation direction, and the gimbal springs 70 are prevented from further rotating around the first axis R1. Therefore, the rotation angle range of the movable body 5 about the first axis R1 can be defined by the second housing protrusion 45B.

In addition, the pair of first housing protrusions 45A define the rotation angle range of the movable body 5 about the second axis R2. That is, when the movable body 5 rotates around the second axis R2 to a predetermined rotation angle, the first housing protrusions 45A come into contact with the first connection portions 74 of the gimbal springs 70 that rotate together with the movable body 5 from the front in the rotation direction, and the gimbal springs 70 are prevented from further rotating around the second axis R2. Accordingly, the rotation angle range of the movable body 5 about the second axis R2 can be defined by the first housing protrusion 45A.

Further, when an impact or the like is applied from the outside, the pair of first housing protrusions 45A define the movement range of the movable body 5 in the direction of the first axis R1. That is, when the movable body 5 moves to one side in the first axis R1 direction due to an impact or the like from the outside, the bent portion 45b of the first housing protrusion 45A located on one side in the first axis R1 direction abuts the holder 16 from the front in the moving direction, and the movable body 5 is restricted from further moving to one side in the first axis R1 direction. When the movable body 5 moves to the other side in the first axis R1 direction due to an impact or the like from the outside, the bent portion 45b of the first housing protrusion 45A located on the other side in the first axis R1 direction abuts the holder 16 from the front in the moving direction, and the movable body 5 is restricted from further moving to the other side in the first axis R1 direction.

(effects of action)

According to this example, the gimbal springs 70 of the gimbal mechanism 7 that support the movable body 5 rotatably about the first axis R1 and the second axis R2 are frame-shaped, and surround the movable body 5 from the radially outer side. Therefore, the gimbal spring 70 does not have a portion overlapping the movable body 5 from the +z direction. Thus, it is not necessary to secure an extra space for the gimbal spring 70 in the +z direction of the movable body 5 in order to rotate the movable body 5 around the first axis R1 and around the second axis R2.

The four arm portions 73 are connected to the +z-direction end edge of the first connecting portion 74 and the +z-direction end edge of the second connecting portion 75, respectively, and each arm portion 73 includes: a first inclined portion 731 that is inclined along the second connection portion 75 side of the perimeter Xiang Xiangdi so as to face the +z direction from the first end portion 74a of the first connection portion 74; a second inclined portion 732 that is inclined along the side of the connection portion 74 of the perimeter Xiang Xiangdi so as to face the +z direction from the second end portion 75a of the second connection portion 75; and a connection portion 733 that connects an end portion of the first inclined portion 731 in the +z direction and an end portion of the second inclined portion 732 in the +z direction. If each arm 73 has the first inclined portion 731 and the second inclined portion 732 in the +z direction of the second connecting portion 75, when the gimbal spring 70 rotates around the first axis R1 together with the movable body 5, the protrusion of the opposite end portions in the second axis R2 direction in the gimbal spring 70 in the +z direction from the movable body 5 toward the outer peripheral side of the movable body 5 can be prevented or suppressed. Further, if each arm 73 includes the first inclined portion 731 and the second inclined portion 732 in the +z direction of the first connecting portion 74, when the gimbal spring 70 rotates around the second axis R2 together with the movable body 5, it is possible to prevent or suppress the both end portions in the first axis R1 direction of the gimbal spring 70 from protruding toward the outer peripheral side of the movable body 5 in the +z direction from the movable body 5.

Each arm 73 has a bent portion 734 at a connection portion 733. This can increase the spring constant of the gimbal spring 70, as compared with the case where the bending portion 734 is not provided in the connection portion 733. In other words, by providing the bending portion 734 at the connection portion 733, the spring constant of the gimbal spring 70 can be adjusted.

In this example, the camera module 4 includes a camera module body a and a lens barrel portion 4b protruding in the +z direction from the camera module body a. The holder 16 includes a camera module accommodating recess 163 having a holder opening 163a that opens in the +z direction. The camera module body a is fitted into the camera module accommodating recess 163 through the holder opening 163a. The gimbal spring 70 and the holder 16 are located closer to the positive Z-direction end face of the camera module body a than to the negative Z-direction end face. Therefore, it becomes easy to secure a space radially outside the lens barrel portion 4b of the camera module 4. This improves the degree of freedom in the arrangement of the optical unit 1 with the shake correction function when the optical unit 1 with the shake correction function is mounted on various devices or the like.

In this example, a rotation support mechanism 6 for supporting the movable body 5 rotatably around the optical axis L is provided. The gimbal mechanism 7 rotatably supports the rotation support mechanism 6 about the first axis R1 and the second axis R2, and supports the movable body 5 via the rotation support mechanism 6. The rotation support mechanism 6 includes a shaft portion 61 coaxial with the optical axis L and protruding in the-Z direction from the movable body 5, a plate holder 63 supported by the gimbal mechanism 7 and rotatable about the first axis R1 and the second axis R2, and a bearing mechanism 62 rotatably supporting the shaft portion 61 on the plate holder 63. Therefore, the movable body 5 is rotatable about the optical axis L while being rotatable about the first axis R1 and about the second axis R2. Thereby, the movable body 5 can be rotated about the optical axis L, about the first axis R1, and about the second axis R2, and shake correction can be performed. The shaft 61 protrudes in the-Z direction from the movable body 5, and the plate holder 63 rotatably supports the shaft 61 via the bearing mechanism 62. Therefore, the plate holder 63 does not need to be provided with a portion in the +z direction of the movable body 5. Thus, even when the plate holder 63 rotates integrally with the movable body 5 about the first axis R1 and about the second axis R2, it is not necessary to secure an extra space for the plate holder 63 in the +z direction of the movable body 5.

The first connection mechanism 71 includes a first shaft-side protrusion 80 provided on the first shaft R1 at the first connection portion 74 of the gimbal spring 70 and protruding toward the plate holder 63, and a first shaft-side recess 68 provided on the plate holder 63 and supporting the tip end of the first shaft-side protrusion 80 so as to be rotatable about the first shaft R1. The second connection mechanism 72 includes a second shaft side protrusion 56 provided on the second shaft R2 in the second vertical frame portion 33 of the fixed body 8 and protruding in the second shaft direction, and a second shaft side recess 79 provided on the second connection portion 75 of the gimbal spring 70 and supporting the tip end of the second shaft side protrusion 56 so as to be rotatable about the second shaft R2. Therefore, the rotation support mechanism 6 for supporting the movable body 5 can be supported by the gimbal mechanism 7 so as to rotate about the first axis R1 and about the second axis R2.

(modification)

The stopper housing 40 (main body 40A) of the fixed body may be made of resin. In this case, the

magnetic members

113 and 123 are fixed to the main body 40A by an adhesive. Accordingly, the adhesive layer 165 is provided between the main body portion 40A and the

magnetic members

113, 123.

In order to construct the first connection mechanism 71, a first shaft-side protrusion protruding toward the outer peripheral side on the first shaft R1 may be provided at the tip end portion of the plate holder extension 67, and a first shaft-side recess rotatably receiving the first shaft-side protrusion may be provided on the first shaft R1 of the first connection portion 74 of the gimbal spring. Similarly, in order to construct the second connection mechanism 72, a second shaft side protrusion may be provided on the second shaft R2 of the second connection portion 75 of the gimbal spring, and a second shaft side recess that rotatably receives the second shaft side protrusion may be provided on the second shaft R2 of the plate portion 36 of each second vertical frame portion 33 of the frame housing 30.

Here, in the case where only correction of YAW direction YAW about the X axis and PITCH direction PITCH about the Y axis is performed as the shake correction, the rotation support mechanism 6 may be omitted from the optical unit 1 having the shake correction function. In this case, the optical unit 1 with the shake correction function has: a movable body 5 provided with a camera module 4; a gimbal mechanism 7 that rotatably supports the movable body 5 about a first axis R1 intersecting the optical axis L of the lens of the camera module 4 and about a second axis R2 intersecting the optical axis L and the first axis; a fixed body 8 supporting the movable body 5 via a gimbal mechanism 7; and a shake correction magnetic drive mechanism 10 that rotates the movable body 5 around the first axis R1 and around the second axis R2. In this case, the shaft portion 61 is omitted from the holder 16. The plate holder 63 and the holder 16 are integrated as the holder 16 of the movable body 5. Thereby, the rotation support mechanism 6 can be omitted.

Claims

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

a movable body provided with a camera module;

a gimbal mechanism that supports the movable body rotatably about a first axis intersecting an optical axis of the camera module and rotatably about a second axis intersecting the optical axis and the first axis; and

A fixed body that supports the movable body via the gimbal mechanism,

the gimbal mechanism includes: a frame-shaped gimbal spring having a pair of first connecting portions located on both sides of the movable body in the first axial direction, a pair of second connecting portions located on both sides of the movable body in the second axial direction, and four arm portions connecting the first connecting portions and the second connecting portions adjacent in the circumferential direction on the outer peripheral side of the movable body; a first connection mechanism that connects each first connection portion and the movable body to be rotatable about the first axis; and a second connecting mechanism connecting the second connecting portion and the fixed body to be rotatable about the second axis,

the gimbal spring surrounds the movable body from a radially outer side.

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

each arm connects a first end portion on the second connecting portion side at an end edge on one side in the optical axis direction of the first connecting portion and a second end portion on the first connecting portion side at an end edge on one side in the optical axis direction of the second connecting portion.

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

the four arm portions are respectively connected to an end edge of the first connecting portion on the object side and an end edge of the second connecting portion on the object side,

each arm portion includes: a first inclined portion inclined toward the second connecting portion side in the circumferential direction so as to be directed toward the object side from the first end portion of the first connecting portion; a second inclined portion inclined toward the first connecting portion side in the circumferential direction so as to be directed toward the object side from the second end portion of the second connecting portion; and a connecting portion that connects the object-side end portion of the first inclined portion and the object-side end portion of the second inclined portion.

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

each arm portion has a bent portion at the connecting portion.

5. The optical unit with a shake correction function according to any one of claims 1 to 4,

the camera module comprises a camera module main body and a lens barrel part protruding from the camera module main body to the side of the object,

The movable body includes a holder having a recess opening toward the object side,

the camera module body is embedded into the recess via the opening,

the gimbal spring and the holder are located on the opposite side of the subject side end surface of the camera module main body.

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

the fixed body is provided with a first stop part limiting the rotation angle range of the movable body around the first shaft and a second stop part limiting the rotation angle range of the movable body around the second shaft,

the first stopper portion is located between the two arm portions extending from the second connecting portion to both sides in the circumferential direction and is opposed to the second connecting portion with a predetermined first interval therebetween in the optical axis direction,

the second stopper portion is located between the two arm portions extending from the first connecting portion to both sides in the circumferential direction, and is opposed to the first connecting portion with a predetermined second interval therebetween in the optical axis direction.

7. The optical unit with a shake correction function according to any one of claims 1 to 6,

The first connection mechanism includes: a first shaft-side protrusion provided on the first shaft, the first shaft-side protrusion protruding toward one of the movable body and the first connecting portion; and a first shaft-side concave portion that supports a tip end of the first shaft-side protruding portion so as to be rotatable about the first shaft in the other direction,

the second connection mechanism includes: a second shaft side protrusion provided on the second shaft and protruding toward one of the fixed body and the second connecting portion; and a second-shaft-side concave portion that supports a distal end of the second-shaft-side protruding portion so as to be rotatable about the second shaft in the other one.

8. The optical unit with a shake correction function according to any one of claims 1 to 6,

a rotation support mechanism for supporting the movable body rotatably around the optical axis,

the gimbal mechanism supports the rotation support mechanism rotatably about a first axis and about a second axis, thereby supporting the movable body via the rotation support mechanism,

the rotation support mechanism includes: a shaft portion coaxial with the optical axis and protruding from the movable body toward a side opposite to the subject; a plate holder supported by the gimbal mechanism and rotatable about the first axis and about the second axis; and a bearing mechanism rotatably supporting the shaft portion to the plate holder.

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

the first connection mechanism includes: a first shaft-side protrusion provided on the first shaft and protruding toward one of the plate holder and the first connecting portion; and a first shaft-side concave portion that supports a tip end of the first shaft-side protruding portion so as to be rotatable about the first shaft in the other direction,