CN116195262A

CN116195262A - Optical unit

Info

Publication number: CN116195262A
Application number: CN202080105635.1A
Authority: CN
Inventors: 大坪京史; 堀尾直史; 岩濑敬之; 佐斋一宏
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2020-09-30
Filing date: 2020-12-24
Publication date: 2023-05-30
Also published as: WO2022070448A1

Abstract

The invention provides an optical unit, which comprises a movable body, a fixed body, a first elastic member and a second elastic member. The centerlines of the first and second elastic members intersect at a plurality of intersection points (P). The plurality of intersection points (P) are arranged on a concentric circle with the center of oscillation of the movable body as the center. The center line is a line connecting the fixed body side end portions of the first elastic member and the second elastic member and the movable body side end portions of the first elastic member and the second elastic member at the shortest distance. The first elastic member and the second elastic member approach each other as facing the optical axis side of the optical element.

Description

Optical unit

Technical Field

The present invention relates to an optical unit.

Background

When a still image or a moving image is photographed by a camera, the photographed image may be blurred due to hand shake. Therefore, a camera shake correction apparatus for enabling clear photographing with image shake prevented is put into practical use. When camera shake occurs, the camera shake correction device corrects the position and orientation of the camera module based on the shake, thereby eliminating image shake.

An optical unit in which a camera module and a fixing portion are connected by a leaf spring is known (for example, chinese patent application publication No. 107450251). The leaf spring is composed of at least three springs, which are not on the same plane, and the center line of each spring passes through the rotation center of the movable component.

Prior art literature

Patent literature

Patent document 1: chinese patent application publication No. 107450251 specification

Disclosure of Invention

Problems to be solved by the invention

However, in the optical unit described in chinese patent application publication No. 107450251, since the center line of each spring passes through the rotation center of the movable member, the force is concentrated at one point. Therefore, there is a possibility that the rigidity becomes weak. As a result, a shake may occur in the captured image.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an optical unit capable of improving rigidity.

Means for solving the problems

An exemplary optical unit of the present invention includes a movable body, a fixed body, a first elastic member, and a second elastic member. The movable body has an optical element. The fixed body is located around the movable body. The fixed body supports the movable body so as to be swingable. In at least three support regions connecting the movable body and the fixed body, the first elastic member and the second elastic member are respectively arranged in the at least three support regions. The centerlines of the first and second elastic members intersect at a plurality of intersection points. The plurality of intersecting points are arranged on a concentric circle with the center of oscillation of the movable body as a center. The center line is a line connecting the fixed body side end portions of the first elastic member and the second elastic member and the movable body side end portions of the first elastic member and the second elastic member at the shortest distance. The first elastic member and the second elastic member approach each other toward the optical axis side of the optical element.

ADVANTAGEOUS EFFECTS OF INVENTION

The optical unit of the present invention can improve rigidity.

Drawings

Fig. 1 is a schematic perspective view of a smart phone provided with an optical unit according to the present embodiment.

Fig. 2 is a schematic perspective view of the optical unit of the present embodiment.

Fig. 3 is a schematic plan view of the optical unit of the present embodiment.

Fig. 4 is a schematic exploded perspective view of the optical unit of the present embodiment.

Fig. 5 is an enlarged view of the vicinity of the first elastic member and the second elastic member.

Fig. 6 is a schematic top view of the support member.

Fig. 7 is a schematic perspective view of the optical unit of the present embodiment.

Fig. 8 is a schematic plan view of the optical unit of the present embodiment.

Fig. 9 is an enlarged view of the vicinity of the first elastic member and the second elastic member.

Fig. 10 is a schematic top view of the support member.

Detailed Description

Hereinafter, an embodiment of an optical unit according to the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and description thereof will not be repeated. In the present specification, in order to facilitate understanding of the invention, the X axis, the Y axis, and the Z axis orthogonal to each other are sometimes described. Here, it should be noted that the X-axis, Y-axis and Z-axis do not limit the orientation of the optical unit in use.

The optical unit 100 is suitable for use as an optical component of a smart phone.

First, a smartphone 200 including the optical unit 100 according to the present embodiment will be described with reference to fig. 1. Fig. 1 is a schematic perspective view of a smartphone 200 provided with an optical unit 100 according to the present embodiment.

As shown in fig. 1, the optical unit 100 is mounted on a smart phone 200, for example. In the smartphone 200, light L is incident from the outside through the optical unit 100, and an object image is captured based on the light incident on the optical unit 100. The optical unit 100 is used to correct shake of a photographed image when the smartphone 200 shakes. The optical unit 100 may include an image pickup device, and the optical unit 100 may include an optical member that transmits light to the image pickup device.

The optical unit 100 is preferably manufactured in a small size. This allows the smart phone 200 itself to be miniaturized, or allows other components to be mounted in the smart phone 200 without increasing the size of the smart phone 200.

The use of the optical unit 100 is not limited to the smart phone 200, and may be used for various devices such as a camera and a video recorder without particular limitation. For example, the optical unit 100 may be mounted on a photographing device such as a mobile phone with a camera or a drive recorder, or may be mounted on an operation camera or a wearable camera mounted on a mobile body such as a helmet, a bicycle, or a radio controlled helicopter.

< Structure of optical Unit 100 >

The structure of the optical unit 100 according to the present embodiment will be described with reference to fig. 2 to 4. Fig. 2 is a schematic perspective view of the optical unit 100 of the present embodiment. Fig. 3 is a schematic plan view of the optical unit 100 of the present embodiment. Fig. 4 is a schematic exploded perspective view of the optical unit 100 of the present embodiment.

As shown in fig. 2 and 3, the optical unit 100 includes a fixed body 110, a movable body 120, a plurality of swing mechanisms 150, and a supporting member 170. The movable body 120 has an optical element 130. The movable body 120 is inserted into the fixed body 110 and is held by the fixed body 110. The fixed body 110 is located around the movable body 120. The fixed body 110 supports the movable body 120 to be swingable.

The plurality of oscillating mechanisms 150 includes a first oscillating mechanism 152 and a second oscillating mechanism 154. The plurality of swinging mechanisms 150 swing the movable body 120 with respect to the fixed body 110, respectively. In detail, as shown in fig. 3, the first swinging mechanism 152 swings the movable body 120 about the first swinging axis Sa1 with respect to the fixed body 110. For example, the first swing axis Sa1 extends parallel to the X-axis direction. Here, the first swinging mechanism 152 is located on the-Y direction side with respect to the movable body 120. The second swinging mechanism 154 swings the movable body 120 about the second swinging axis Sa2 with respect to the fixed body 110. For example, the second swing shaft Sa2 extends parallel to the Y-axis direction. Here, the second swinging mechanism 154 is located on the-X direction side with respect to the movable body 120.

The first swinging mechanism 152 has a magnet 152a and a coil 152b. Typically, the magnet 152a is a permanent magnet. The coil 152b faces the magnet 152 a. The magnet 152a is included in one of the fixed body 110 and the movable body 120, and the coil 152b is included in the other of the fixed body 110 and the movable body 120. The movable body 120 can be swung with respect to the fixed body 110 by the magnet 152a and the coil 152b.

Here, the magnet 152a is disposed on the movable body 120, and the coil 152b is disposed on the fixed body 110. The magnet 152a is located on the-Y direction side with respect to the movable body 120, and the coil 152b is located on the-Y direction side of the fixed body 110.

The second swinging mechanism 154 has a magnet 154a and a coil 154b. Typically, the magnet 154a is a permanent magnet. The coil 154b faces the magnet 154 a. The magnet 154a is included in one of the fixed body 110 and the movable body 120, and the coil 154b is included in the other of the fixed body 110 and the movable body 120. The movable body 120 can be swung with respect to the fixed body 110 by the magnet 154a and the coil 154b.

Here, the magnet 154a is disposed on the movable body 120, and the coil 154b is disposed on the fixed body 110. The magnet 154a is located on the-X direction side with respect to the movable body 120, and the coil 154b is located on the-X direction side of the fixed body 110.

In addition, the first swing mechanism 152 and the second swing mechanism 154 may also swing the movable body 120 with respect to the fixed body 110 by supplying an electric signal to the shape memory alloy.

The movable body 120 includes an optical element 130 and a holder 140. The optical element 130 has an optical axis PX. The holder 140 can insert the optical element 130.

When the movable body 120 is inserted into the fixed body 110 and the movable body 120 is mounted on the fixed body 110, the optical axis PX of the optical element 130 is parallel to the Z-axis direction. When the movable body 120 swings relative to the fixed body 110 from this state, the optical axis PX of the optical element 130 swings, and therefore the optical axis PX is no longer in a state parallel to the Z-axis direction.

The following description will be given on the premise that the movable body 120 is not swung with respect to the fixed body 110, and the optical axis PX is kept parallel to the Z-axis direction. That is, in description of the shape, positional relationship, operation, and the like of the fixed body 110, the movable body 120, and the like with reference to the optical axis PX, unless otherwise noted, the optical axis PX is in a state parallel to the Z-axis direction.

The first swinging mechanism 152 swings the movable body 120 about the first swinging axis Sa1 with respect to the fixed body 110. Here, the first swing axis Sa1 is parallel to the X axis direction. The X-axis direction is a direction intersecting the optical axis PX, and is a rotation axis in the pitch direction. Typically, the first swing axis Sa1 is orthogonal to the optical axis PX.

The second swinging mechanism 154 swings the movable body 120 about the second swinging axis Sa2 with respect to the fixed body 110. Here, the second swing axis Sa2 is parallel to the Y axis direction. The Y-axis direction is a direction intersecting the optical axis PX, and is a rotation axis in the yaw direction. Typically, the second swing axis Sa2 is orthogonal to the optical axis PX.

In the optical device having the optical element 130, if the optical device is tilted at the time of photographing, the optical element 130 is tilted and the photographed image is disturbed. In order to avoid disturbance of the captured image, the optical unit 100 corrects the tilt of the optical element 130 based on acceleration, angular velocity, shake amount, and the like detected by a detection unit such as a hall sensor or a gyroscope. In the present embodiment, the optical unit 100 corrects the tilt of the optical element 130 by swinging (rotating) the movable body 120 in a rotation direction (pitch direction) about the X axis as a rotation axis. In the present embodiment, the optical unit 100 corrects the tilt of the optical element 130 by swinging (rotating) the movable body 120 in a rotation direction (yaw direction) about the Y axis as a rotation axis.

The optical axis PX of the optical element 130 is parallel to the normal of the light incident surface of the optical element 130. Light from the optical axis PX is incident on the optical element 130.

The optical element 130 has a lens 132 and a housing 134. The optical element 130 may have an image pickup element within the housing 134. The optical element 130 provided with the image pickup element is also called a camera module. When the optical element 130 is inserted into the holder 140, the optical element 130 is held by the holder 140.

The holder 140 has a ring shape with both ends open in the Z-axis direction. An optical element 130 is mounted on the inner side of the holder 140.

The holder 140 is a plate-like frame having a thickness extending in a direction orthogonal to the optical axis PX. Typically, the thickness of the holder 140 is thinner than the thickness of the fixing body 110. In other words, the upper surface of the holder 140 is located at a lower position than the upper surface of the fixed body 110. The direction orthogonal to the optical axis PX is a direction intersecting the optical axis PX and perpendicular to the optical axis PX. In the present specification, a direction orthogonal to the optical axis PX may be referred to as a "radial direction". The radially outer side shows a direction away from the optical axis PX in the radial direction. In fig. 2, R shows an example of the radial direction. The direction of rotation about the optical axis PX may be referred to as a "circumferential direction". In fig. 2, S shows the circumferential direction.

The fixing body 110 includes a first inner side 112a, a second inner side 112b, a third inner side 112c, a fourth inner side 112d, a first corner 114a, a second corner 114b, a third corner 114c, and a fourth corner 114d. The first inner side surface 112a is located on the-X direction side. The second inner side surface 112b is located on the +y direction side. The third inner side surface 112c is located on the +x direction side. The fourth inner side surface 112d is located on the-Y direction side. The first corner 114a connects the first inner side 112a and the second inner side 112b. The second corner 114b connects the second inner side 112b and the third inner side 112c. The third corner 114c connects the third inner side 112c and the fourth inner side 112d. The fourth corner 114d connects the fourth inner side 112d and the first inner side 112a.

As shown in fig. 3, the optical unit 100 has at least three support regions SR. Here, the optical unit 100 has four support regions SR. The four support regions SR include a support region SR1, a support region SR2, a support region SR3, and a support region SR4. The support region SR connects the movable body 120 and the fixed body 110. The support region SR1 is disposed at the end of the optical unit 100 in the-X direction and the-Y direction. The support region SR2 is disposed at the end of the optical unit 100 in the-X direction and the +y direction. The support region SR3 is disposed at the end of the optical unit 100 on the +x direction side and the +y direction side. The support region SR4 is disposed at the end of the optical unit 100 on the +x direction side and the-Y direction side. Specifically, the support regions SR are located at the first corner 114a, the second corner 114b, the third corner 114c, and the fourth corner 114d, respectively. The at least three support regions SR are arranged at equal angular intervals with respect to the swing center CP of the movable body 120. The swing center CP is, for example, a point at which the first swing axis Sa1 and the second swing axis Sa2 intersect. Here, the four support regions SR are arranged at 90-degree intervals with respect to the swing center CP.

The optical unit 100 further includes a first elastic member 171 and a second elastic member 172. More specifically, in the present embodiment, the optical unit 100 is provided with the support member 170, and the support member 170 is provided with the first elastic member 171 and the second elastic member 172. The first elastic member 171 and the second elastic member 172 are leaf springs. The first elastic member 171 and the second elastic member 172 are disposed in each of at least three support regions SR. Here, the first elastic member 171 and the second elastic member 172 are disposed in four support regions SR (support region SR1, support region SR2, support region SR3, and support region SR 4), respectively. Specifically, the first elastic member 171a and the second elastic member 172a are disposed in the support region SR 1. The first elastic member 171b and the second elastic member 172b are disposed in the support region SR 2. The first elastic member 171c and the second elastic member 172c are disposed in the support region SR 3. The first elastic member 171d and the second elastic member 172d are disposed in the support region SR4.

The first elastic member 171 and the second elastic member 172 are inclined toward the optical element 130 with respect to a plane (XY plane) perpendicular to the optical axis PX as they face the optical axis PX of the optical element 130.

As shown in fig. 4, the support member 170 has a plurality of first elastic members 171, a plurality of second elastic members 172, an outer frame 175, and an inner frame 176. The outer frame 175 is disposed further outward in the radial direction R than the inner frame 176. The outer frame 175 and the inner frame 176 are annular members. The outer frame 175 has a diameter longer than the inner frame 176. The support member 170 is mounted on the fixed body 110 and the movable body 120. For example, the support member 170 is attached to the movable body 120 by bonding the lower surface of the outer frame 175 to the upper surface 116 of the fixed body 110. In addition, the support member 170 is mounted on the movable body 120 by bonding the lower surface of the inner frame 176 and the upper surface 146 of the holder 140. The plurality of first elastic members 171 and the plurality of second elastic members 172 are disposed between the outer frame 175 and the inner frame 176. Here, the outer frame 175 and the inner frame 176 are connected by a plurality of first elastic members 171 and a plurality of second elastic members 172.

The first elastic member 171 and the second elastic member 172 are further described with reference to fig. 5. Fig. 5 is an enlarged view of the vicinity of the first elastic member 171 and the second elastic member 172.

As shown in fig. 5, the first elastic member 171 and the second elastic member 172 approach each other as they face the optical axis PX side of the optical element 130. The first elastic member 171 and the second elastic member 172 have a waveform. In other words, the first elastic member 171 and the second elastic member 172 are bent. The end 1712 of the first elastic member 171 on the fixed body 110 side and the end 1722 of the second elastic member 172 on the fixed body 110 side are connected to the fixed body 110 independently. The movable body 120-side end 1714 of the first elastic member 171 and the movable body 120-side end 1724 of the second elastic member 172 are connected to the movable body 120 independently.

In fig. 5, a center line CL1 shows a center line of the first elastic member 171. The center line CL2 shows the center line of the second elastic member 172. The center line CL1 is a line connecting the end 1712 of the first elastic member 171 on the fixed body 110 side and the end 1714 of the first elastic member 171 on the movable body 120 side at the shortest distance. The center line CL2 is a line connecting the end 1722 of the second elastic member 172 on the fixed body 110 side and the end 1724 of the second elastic member 172 on the movable body 120 side at the shortest distance.

Referring to fig. 6, the optical unit 100 is further described. Fig. 6 is a schematic top view of the support member 170. In fig. 6, the center lines CL1a, CL1b, CL1c, and CL1d show the center lines of the first elastic member 171a, the first elastic member 171b, the first elastic member 171c, and the first elastic member 171d, respectively. The center lines CL2a, CL2b, CL2c, and CL2d show the center lines of the second

elastic member

172a, 172b, 172c, and 172d, respectively.

As shown in fig. 6, the center line CL1 of the first elastic member 171 and the center line CL2 of the second elastic member 172 intersect at a plurality of intersection points. Wherein the center line CL1 of the first elastic member 171 and the center line CL2 of the second elastic member 172 intersect at an intersection point P11 to an intersection point P14, an intersection point P21 to an intersection point P24, an intersection point P31 to an intersection point P38, an intersection point P41 to an intersection point P44, and an intersection point P51 to an intersection point P54. For example, the center line CL2c and the center line CL1d intersect at an intersection point P21. The center line CL2d and the center line CL1a intersect at an intersection point P22. The center line CL2a and the center line CL1b intersect at an intersection point P23. The center line CL2b and the center line CL1c intersect at an intersection point P24. In the present specification, the center lines CL1 and CL2 may be collectively referred to as the center lines CL, and the intersection points P11 to P14, the intersection points P21 to P24, the intersection points P31 to P38, the intersection points P41 to P44, and the intersection points P51 to P54 may be collectively referred to as the intersection points P.

The plurality of intersection points P are arranged on a concentric circle centering on the swing center CP of the movable body 120. Specifically, the intersections P11 to P14 are arranged on a circle C1 centered on the swing center CP. The intersection points P21 to P24 are arranged on a circle C2 centered on the swing center CP. The intersection points P31 to P38 are arranged on a circle C3 centered on the swing center CP. The intersection points P41 to P44 are arranged on a circle C4 centered on the swing center CP. The intersection points P51 to P54 are arranged on a circle C5 centered on the swing center CP. The circles C1, C2, C3, C4, and C5 are concentric circles centered on the swing center CP. The radii of the circles are in the order of circle C1, circle C2, circle C3, circle C4, and circle C5 from large to small. That is, the radius of circle C1 > the radius of circle C2 > the radius of circle C3 > the radius of circle C4 > the radius of circle C5. The plurality of intersection points P are arranged rotationally symmetrically with respect to the swing center CP of the movable body 120.

As described above with reference to fig. 1 to 6, the centerlines (centerlines CL1 and CL 2) of the first elastic member 171 and the second elastic member 172 intersect at a plurality of intersection points P. The plurality of intersection points P are arranged on a concentric circle centering on the swing center CP of the movable body 120. Therefore, the suppression force can be concentrated at one point. Therefore, the rigidity can be improved. As a result, the occurrence of shake in the captured image can be suppressed.

The plurality of intersection points P are arranged rotationally symmetrically with respect to the swing center CP of the movable body 120. Therefore, the balance of the movable body 120 can be easily obtained.

The end 1712 of the first elastic member 171 on the fixed body 110 side and the end 1722 of the second elastic member 172 on the fixed body 110 side are connected to the fixed body 110 independently. The movable body 120-side end 1714 of the first elastic member 171 and the movable body 120-side end 1724 of the second elastic member 172 are connected to the movable body 120 independently. Therefore, the rigidity can be improved.

In addition, the first elastic member 171 and the second elastic member 172 are leaf springs. Therefore, the rigidity can be improved with a simple structure.

In addition, at least three support regions SR are arranged at equal angular intervals with respect to the swing center CP of the movable body 120. Thus, the stability of the support can be improved.

The support regions SR are located at the first corner 114a, the second corner 114b, the third corner 114c, and the fourth corner 114d, respectively. Therefore, the balance of the movable body 120 can be easily obtained.

The first elastic member 171 and the second elastic member 172 have a waveform. Therefore, the balance of the movable body 120 can be easily obtained. Further, the spring constant can be reduced. As a result, the movable body 120 can be moved with a small force.

The first elastic member 171 and the second elastic member 172 are inclined toward the optical element 130 with respect to a plane (XY plane) perpendicular to the optical axis PX as they face the optical axis PX of the optical element 130. Accordingly, the total elastic force of the elastic members included in the support region SR is directed toward the swing center CP. As a result, the balance of the movable body 120 can be easily achieved.

In the above description with reference to fig. 2 to 6, the movable body 120-side end 1714 of the first elastic member 171 and the movable body 120-side end 1724 of the second elastic member 172 are connected to the movable body 120 independently, but the present embodiment is not limited thereto. The first elastic member 171 and the second elastic member 172 may not be directly connected to the movable body 120.

Next, the structure of the optical unit 100 according to the present embodiment will be described with reference to fig. 7 to 10. Fig. 7 is a schematic perspective view of the optical unit 100 of the present embodiment. Fig. 8 is a schematic plan view of the optical unit 100 of the present embodiment. Fig. 9 is an enlarged view of the vicinity of the first elastic member 171 and the second elastic member 172. Fig. 10 is a schematic top view of the support member 170. The optical unit 100 of fig. 7 and 8 has the same configuration as the optical unit 100 described with reference to fig. 2 to 6 except that the shapes of the first elastic member 171 and the second elastic member 172 and that the first elastic member 171 and the second elastic member 172 are not directly connected to the movable body 120, and overlapping descriptions are omitted to avoid redundancy.

As shown in fig. 7 and 8, the optical unit 100 of the present embodiment has a different shape of the first elastic member 171 and the second elastic member 172 from the optical unit 100 described with reference to fig. 2 to 6.

As shown in fig. 9, the optical unit 100 further includes a coupling portion 180 and a connection member 190. The coupling portion 180 couples the first elastic member 171 and the second elastic member 172. The connection member 190 connects the coupling portion 180 and the movable body 120. That is, the first elastic member 171 and the second elastic member 172 are connected to the movable body 120 via the connecting member 190. As a result, the angle θ formed by the first elastic member 171 and the second elastic member 172 can be set large. The first elastic member 171, the second elastic member 172, the coupling portion 180, and the connecting member 190 may be a single member or may be different members.

As shown in fig. 10, the center line CL1 of the first elastic member 171 and the center line CL2 of the second elastic member 172 intersect at a plurality of intersection points P. Wherein the center line CL1 of the first elastic member 171 and the center line CL2 of the second elastic member 172 intersect at an intersection point P11 to an intersection point P14, an intersection point P21 to an intersection point P28, an intersection point P31 to an intersection point P34, and an intersection point P41 to an intersection point P44. For example, the center line CL2c and the center line CL1d intersect at an intersection point P11. The center line CL2d and the center line CL1a intersect at an intersection point P12. The center line CL2a and the center line CL1b intersect at an intersection point P13. The center line CL2b and the center line CL1c intersect at an intersection point P14. In the present specification, the center lines CL1 and CL2 may be collectively referred to as the center lines CL, and the intersection points P11 to P14, the intersection points P21 to P28, the intersection points P31 to P34, and the intersection points P31 to P34 may be collectively referred to as the intersection points P.

The plurality of intersection points P are arranged on a concentric circle centering on the swing center CP of the movable body 120. Specifically, the intersections P11 to P14 are arranged on a circle C1 centered on the swing center CP. The intersection points P21 to P28 are arranged on a circle C2 centered on the swing center CP. The intersection points P31 to P34 are arranged on a circle C3 centered on the swing center CP. The intersection points P41 to P44 are arranged on a circle C4 centered on the swing center CP. The circles C1, C2, C3, and C4 are concentric circles centered on the swing center CP. The radii of the circles are in the order of circle C1, circle C2, circle C3, and circle C4 from large to small. That is, the radius of the circle C1 > the radius of the circle C2 > the radius of the circle C3 > the radius of the circle C4. The plurality of intersection points P are arranged rotationally symmetrically with respect to the swing center CP of the movable body 120.

As described above with reference to fig. 9, the coupling portion 180 connects the first elastic member 171 and the second elastic member 172. The connection member 190 connects the coupling portion 180 and the movable body 120. Therefore, the angle θ formed by the first elastic member 171 and the second elastic member 172 can be set to be large (see fig. 9). Therefore, the concentric circle in which the plurality of intersections P are arranged can be made larger. As a result, the rigidity can be improved.

Embodiments of the present invention are described above with reference to the accompanying drawings (fig. 1 to 10). However, the present invention is not limited to the above-described embodiments, and may be implemented in various forms (for example, as follows) within a scope not departing from the gist thereof. For ease of understanding, the drawings schematically show the respective components as main components, and the thickness, length, number, and the like of the components are different from those of the actual drawings due to convenience in manufacturing the drawings. The materials, shapes, sizes, and the like of the respective constituent elements shown in the above embodiments are examples, and are not particularly limited, and various modifications can be made within a range substantially not departing from the effects of the present invention.

For example, in the above-described embodiment, one first elastic member 171 and one second elastic member 172 are arranged in each support region SR, but the present invention is not limited to this. For example, more than two elastic members may be disposed in the support region SR. From the viewpoint of balance, the number of elastic members disposed in the support region SR is preferably an even number.

Symbol description

100-an optical unit; 110-a fixed body; 112 a-a first inner side; 112 b-a second inner side; 112 c-a third inner side; 112 d-a fourth inner side; 114 a-a first corner; 114 b-a second corner; 114 c-a third corner; 114 d-fourth corner; 120-a movable body; 130-an optical element; 171. 171a, 171b, 171c, 171 d-first elastic members; 172. 172a, 172b, 172c, 172 d-a second elastic member; 180—a joint; 190—a connection member; CL1, CL1a, CL1b, CL1c, CL1 d-centerlines; CL2, CL2a, CL2b, CL2c, CL2 d-centerlines; cp—center of swing; l-light; p-intersection; px—optical axis; SR, SR1, SR2, SR3, SR 4-support region.

Claims

1. An optical unit, comprising:

a movable body having an optical element;

a fixed body that is located around the movable body and that supports the movable body so as to be swingable; and

a first elastic member and a second elastic member disposed in at least three support regions connecting the movable body and the fixed body, respectively,

the centerlines of the first and second elastic members intersect at a plurality of intersection points,

the plurality of intersecting points are arranged on a concentric circle with the center of oscillation of the movable body as the center,

the center line is a line connecting the end portions of the first elastic member and the second elastic member on the fixed body side and the end portions of the first elastic member and the second elastic member on the movable body side at the shortest distance,

the first elastic member and the second elastic member approach each other toward an optical axis side of the optical element.

2. An optical unit as claimed in claim 1, characterized in that,

the plurality of intersecting points are arranged rotationally symmetrically with respect to the swing center of the movable body.

3. An optical unit according to claim 1 or 2, characterized in that,

the end of the first elastic member on the fixed body side and the end of the second elastic member on the fixed body side are respectively and independently connected with the fixed body,

the movable body side end of the first elastic member and the movable body side end of the second elastic member are connected to the movable body independently.

4. An optical unit according to any one of claims 1 to 3, further comprising:

a coupling portion that couples the first elastic member and the second elastic member; and

and a connecting member that connects the coupling portion and the movable body.

5. The optical unit according to any one of claims 1 to 4, wherein,

the first elastic member and the second elastic member are leaf springs.

6. The optical unit according to any one of claims 1 to 5, wherein,

the at least three support regions are disposed at equal angular intervals with respect to the swing center of the movable body.

7. An optical unit according to any one of claims 1 to 6, characterized in that,

the fixing body includes:

a first inner side;

a second inner side;

a third inner side;

a fourth inner side;

a first corner connecting the first inner side and the second inner side;

a second corner connecting the second inner side and the third inner side;

a third corner connecting the third inner side and the fourth inner side; and

a fourth corner portion connecting the fourth inner side surface and the first inner side surface,

the number of the at least three support areas is four,

the support area is respectively positioned at the first corner, the second corner, the third corner and the fourth corner.

8. The optical unit according to any one of claims 1 to 7, characterized in that,

the first elastic member and the second elastic member are in a wave shape.

9. An optical unit according to any one of claims 1 to 8, characterized in that,

the first elastic member and the second elastic member are inclined toward the optical axis of the optical element with respect to a direction in which a face perpendicular to the optical axis approaches the optical element.