CN116324612A

CN116324612A - Optical unit

Info

Publication number: CN116324612A
Application number: CN202080105690.0A
Authority: CN
Inventors: 佐斋一宏; 江川智浩; 大坪京史; 田中元纪
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2020-09-30
Filing date: 2020-12-24
Publication date: 2023-06-23
Also published as: WO2022070449A1

Abstract

The optical unit is provided with: a movable body having an optical element; a fixed body located around the movable body; and a first swinging mechanism configured to swing the movable body relative to the fixed body about a first swinging axis, wherein one of the movable body and the fixed body has a first magnet and a second magnet, and the other of the movable body and the fixed body has a first magnetic body facing the first magnet and a second magnetic body facing the second magnet, and the first swinging axis passes through a first magnet arrangement region in which the first magnet is arranged, a first magnetic body arrangement region in which the first magnetic body is arranged, a second magnet arrangement region in which the second magnet is arranged, and a second magnetic body arrangement region in which the second magnetic body is arranged, respectively.

Description

Optical unit

Technical Field

The present invention relates to an optical unit.

Background

When a still image or a moving image is captured by a camera, there is a case where the captured image is blurred due to camera shake. Therefore, a camera shake correction apparatus for enabling clear photographing with image blur prevented is being put into practical use. When the camera is subject to shake, the camera shake correction device can cancel blurring of an image by correcting the position and orientation of the camera module based on the shake.

In order to miniaturize a lens driving device having a shake correction function, it is studied to design some of a plurality of rolling members supporting a shake correction unit with a degree of freedom larger than that of other rolling members (for example, refer to japanese laid-open patent publication No. 2017-90887). In the lens driving device of japanese unexamined patent publication No. 2017-90887, the position in the vertical direction is specified by disposing a yoke at a position opposed to a magnet for swinging, and by maintaining the contact state of the rolling member with the housing.

Prior art literature

Patent literature

Patent document 1: japanese laid-open publication: japanese patent laid-open No. 2017-90887

Disclosure of Invention

Problems to be solved by the invention

In the lens driving device of japanese unexamined patent publication No. 2017-90887, although the position in the vertical direction is specified by the yoke, there is a concern that the position of the movable body relative to the fixed body may be shifted when the movable body swings relative to the fixed body.

In view of the above-described problems, an object of the present invention is to provide an optical unit capable of achieving stable swinging of a movable body relative to a fixed body.

Means for solving the problems

An optical unit according to an aspect of the present invention includes: a movable body having an optical element; a fixed body located around the movable body; and a first swinging mechanism that swings the movable body relative to the fixed body about a first swinging axis. One of the movable body and the fixed body has a first magnet and a second magnet, the other of the movable body and the fixed body has a first magnetic body facing the first magnet and a second magnetic body facing the second magnet, and the first swing shaft passes through a first magnet arrangement region in which the first magnet is arranged, a first magnetic body arrangement region in which the first magnetic body is arranged, a second magnet arrangement region in which the second magnet is arranged, and a second magnetic body arrangement region in which the second magnetic body is arranged, respectively.

Effects of the invention

The optical unit of the present invention can enable the movable body to swing stably relative to the fixed body.

Drawings

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

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

Fig. 3 is a schematic perspective view of the first swing mechanism, the magnet, and the magnetic body in the optical unit of the present embodiment.

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

Fig. 5A is a schematic perspective view of the first swing mechanism, the magnet, and the magnetic body in the optical unit of the present embodiment.

Fig. 5B is a schematic perspective view of the first swing mechanism, the magnet, and the magnetic body in the optical unit of the present embodiment.

Fig. 6A is a schematic perspective view of the first swing mechanism, the magnet, and the magnetic body in the optical unit of the present embodiment.

Fig. 6B is a schematic perspective view of the first swing mechanism, the magnet, and the magnetic body in the optical unit of the present embodiment.

Fig. 7 is a schematic perspective view of the first swing mechanism, the second swing mechanism, the magnet, and the magnetic body in the optical unit of the present embodiment.

Fig. 8A is a schematic perspective view of the first swing mechanism, the second swing mechanism, the magnet, and the magnetic body in the optical unit of the present embodiment.

Fig. 8B is a schematic perspective view of the first swing mechanism, the second swing mechanism, the third swing mechanism, the magnet, and the magnetic body of the optical unit of the present embodiment.

Fig. 9A is a schematic perspective view of the first swing mechanism, the magnet, and the magnetic body of the optical unit of the present embodiment.

Fig. 9B is a schematic perspective view of the first swing mechanism, the second swing mechanism, the third swing mechanism, the magnet, and the magnetic body in the optical unit of the present embodiment.

Fig. 10 is a schematic exploded perspective view of the optical unit of the present embodiment.

Fig. 11A is a schematic plan view of the movable body and the magnet in the optical unit of the present embodiment.

Fig. 11B is a schematic plan view of the fixed body in the optical unit of the present embodiment.

Fig. 12A is a schematic perspective view of the movable body in the optical unit of the present embodiment.

Fig. 12B is a schematic plan view of the optical unit of the present embodiment.

Fig. 12C is a schematic cross-sectional view of the optical unit along line XIIC-XIIC of fig. 12B.

Fig. 12D is a schematic cross-sectional view of the optical unit along line XIID-XIID of fig. 12B.

Fig. 13 is a schematic perspective view of the first swing mechanism, the second swing mechanism, the third swing mechanism, the magnet, and the magnetic body of the optical unit of the present embodiment.

Fig. 14A is a schematic perspective view of the movable body in the optical unit of the present embodiment.

Fig. 14B is a schematic plan view of the optical unit of the present embodiment.

Fig. 14C is a schematic cross-sectional view of the optical unit along the XIVC-XIVC line of fig. 14B.

Detailed Description

Hereinafter, an exemplary optical unit embodiment of 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 the 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, the Y-axis, and the Z-axis do not limit the direction of use of the optical unit.

The optical unit 100 is suitable to be used as an optical element 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 smart phone 200 provided with an optical unit 100 of the present embodiment.

As shown in fig. 1, the optical unit 100 is mounted on a smart phone 200, for example. In the smart phone 200, light L is incident from the outside via 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 for correction of shake of a photographed image when the smart phone 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 made compact. Thus, the smart phone 200 itself can be miniaturized, or other components can be mounted in the smart phone 200 without making the smart phone 200 large.

The use of the optical unit 100 is not limited to the smart phone 200, and can 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 camera device such as a mobile phone with a camera or a car recorder, or an operation camera and a wearable camera mounted on a moving body such as a helmet, a bicycle, a remote control helicopter, or the like.

Structure of optical unit 100

Next, the structure of the optical unit 100 according to the present embodiment will be described with reference to fig. 2 and 3. Fig. 2 is a schematic perspective view of the optical unit 100 according to the present embodiment, and fig. 3 is a schematic perspective view of the first swinging mechanism 152, the magnet 160, and the magnetic body 170 in the optical unit 100 according to the present embodiment. In fig. 3, the movable body 120 for reference is shown by a two-dot chain line.

As shown in fig. 2 and 3, the optical unit 100 includes a fixed body 110, a movable body 120, and a first swinging mechanism 152. 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. An FPC180 is attached to an outer surface of the stationary body 110.

The first swinging mechanism 152 swings the movable body 120 relative to the fixed body 110. The movable body 120 swings in the XZ plane with the center of the movable body 120 fixed in the XZ plane by the first swing mechanism 152. The first swing mechanism 152 swings the movable body 120 about the first swing axis Sa1 with respect to the fixed body 110. For example, the first swing shaft Sa1 extends parallel to the Y-axis direction. Here, the first swinging mechanism 152 is located on the-X direction side with respect to the movable body 120.

The optical unit 100 may further include a cover 100L. By covering one side of the fixed body 110 and one side of the movable body 120 with the cover portion 100L, the movable body 120 can be prevented from being separated from the fixed body 110.

The movable body 120 includes an optical element 130 and a holder 140. The optical element 130 has an optical axis P. The holder 140 can be inserted into the optical element 130.

When the movable body 120 is inserted into the fixed body 110 and the movable body 120 is assembled to the fixed body 110, the optical axis P of the optical element 130 is parallel to the Z-axis direction. From this state, when the movable body 120 swings with respect to the fixed body 110, the optical axis P of the optical element 130 swings, and therefore, the optical axis P is not parallel to the Z-axis direction.

Hereinafter, a case will be described in which the movable body 120 is held in a state in which it does not swing with respect to the fixed body 110 and the optical axis P is 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, the cover 100L, and the like with reference to the optical axis P, unless otherwise noted, the inclination of the optical axis P is assumed to be parallel to the Z-axis direction.

Further, 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 Y axis direction. The Y-axis direction is a direction intersecting the optical axis P, and is an axis of rotation in the pitch direction. Typically, the first swing axis Sa1 is orthogonal to the optical axis P.

As will be described later in this specification, a swinging mechanism other than the first swinging mechanism 152 may swing the movable body 120 with respect to the fixed body 110 around the X-axis direction or the Z-axis direction. The X-axis direction is a direction orthogonal to the optical axis P, and is an axis of rotation in the yaw direction. The Z-axis direction is parallel to the optical axis direction in which the optical axis P of the optical element 130 extends, and is the axis of rotation in the tumble direction.

In the optical device including 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 the acceleration, angular velocity, shake amount, and the like detected by the detection unit such as 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 the rotation direction (pitch direction) about the Y axis as the rotation axis. In addition to the pitch direction, the optical unit 100 may correct the tilt of the optical element 130 by swinging (rotating) the movable body 120 in a rotation direction (yaw direction) about the X axis as a rotation axis and in a rotation direction (roll direction) about the Z axis as a rotation axis.

The optical axis P of the optical element 130 is parallel to the normal of the light incident surface of the optical element 130. Light along the optical axis P 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 in the case 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 to 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-shaped frame having a thickness extending in a direction orthogonal to the optical axis P. The direction orthogonal to the optical axis P is a direction intersecting the optical axis P and perpendicular to the optical axis P. In the present specification, a direction perpendicular to the optical axis P may be referred to as a "radial direction". The radially outer side represents a direction away from the optical axis P in the radial direction. In fig. 2, R represents an example of the radial direction. The direction of rotation about the optical axis P may be referred to as a "circumferential direction". In fig. 2, S denotes a circumferential direction.

The optical unit 100 of the present embodiment further includes a magnet 160. The magnet 160 includes a first magnet 162 and a second magnet 164. Here, the first magnet 162 and the second magnet 164 are disposed at different positions on the outer surface of the movable body 120. The first magnet 162 is located on the-Y direction side with respect to the movable body 120, and extends in the X axis direction. The second magnet 164 is located on the +y direction side with respect to the movable body 120, and extends in the X axis direction.

The optical unit 100 further includes a magnetic body 170. The magnetic body 170 faces the magnet 160. When the magnet 160 is provided on one of the fixed body 110 and the movable body 120, the magnetic body 170 is provided on the other of the fixed body 110 and the movable body 120. Here, the magnetic body 170 is mounted on the FPC180.

The magnetic body 170 includes a first magnetic body 172 and a second magnetic body 174. Here, the first magnetic body 172 and the second magnetic body 174 are disposed at different positions on the outer surface of the fixed body 110. The first magnetic body 172 is located on the-Y direction side with respect to the movable body 120. The second magnetic body 174 is located on the +y direction side with respect to the movable body 120.

Thus, the first magnetic body 172 faces the first magnet 162, and the second magnetic body 174 faces the second magnet 164. The first magnetic body 172 and the second magnetic body 174 are disposed at different positions of the fixed body 110. The first magnetic body 172 and the second magnetic body 174 are mounted on the fixed body 110 via the FPC180. One of the fixed body 110 and the movable body 120 includes a first magnet 162 and a second magnet 164, and the other of the fixed body 110 and the movable body 120 includes a first magnetic body 172 and a second magnetic body 174.

The first swing mechanism 152 swings the movable body 120 about the first swing axis Sa1 with respect to the fixed body 110. The first swinging mechanism 152 swings the movable body 120 relative to the fixed body 110.

Typically, the first swinging mechanism 152 is disposed in both the fixed body 110 and the movable body 120. The first swinging mechanism 152 may be composed of a magnet and a coil. Alternatively, the first swinging mechanism 152 may swing the movable body 120 with respect to the fixed body 110 by supplying an electric signal to the shape memory alloy.

The first swing shaft Sa1 passes through the first magnet arrangement region 162R in which the first magnet 162 is arranged, the first magnetic body arrangement region 172R in which the first magnetic body 172 is arranged, the second magnet arrangement region 164R in which the second magnet 164 is arranged, and the second magnetic body arrangement region 174R in which the second magnetic body 174 is arranged, respectively. The first magnet arrangement region 162R is a region defined by the outer edge of the first magnet 162 by projecting the outer edge of the first magnet 162 in the extending direction of the first swing axis Sa 1. The first magnetic body arrangement region 172R is a region defined by the outer edge of the first magnetic body 172 by projecting the outer edge of the first magnetic body 172 in the extending direction of the first swing axis Sa 1. The second magnet arrangement region 164R is a region defined by the outer edge of the second magnet 164 by projecting the outer edge of the second magnet 164 in the extending direction of the first swing axis Sa 1. The second magnetic body arrangement region 174R is a region defined by the outer edge of the second magnetic body 174 by projecting the outer edge of the second magnetic body 174 in the extending direction of the first swing axis Sa 1.

Therefore, the direction of magnetic attraction between the fixed body 110 and the movable body 120 by the group of the first magnet 162 and the first magnetic body 172 and the group of the second magnet 164 and the second magnetic body 174 coincides with the first swing axis Sa 1. Therefore, when the movable body 120 swings about the first swing axis Sa1, the movable body 120 can be stably swung. Further, since the position on the first swing axis Sa1 of the movable body 120 is determined by the group of the first magnet 162 and the first magnetic body 172 and the group of the second magnet 164 and the second magnetic body 174, the displacement of the movable body 120 with respect to the fixed body 110 can be suppressed.

The first magnet 162 and the second magnet 164 shown in fig. 2 and 3 are each a single rectangular parallelepiped member, and the first magnet 162 and the second magnet 164 cover the entire surface of each of the first magnet arrangement region 162R and the second magnet arrangement region 164R. However, the first magnet 162 and the second magnet 164 may partially cover each of the first magnet arrangement region 162R and the second magnet arrangement region 164R.

The first magnetic body 172 and the second magnetic body 174 shown in fig. 2 and 3 are each a single rectangular parallelepiped member, and the first magnetic body 172 and the second magnetic body 174 cover the entire surface of each of the first magnetic body arrangement region 172R and the second magnetic body arrangement region 174R. However, the first magnetic body 172 and the second magnetic body 174 may partially cover each of the first magnetic body arrangement region 172R and the second magnetic body arrangement region 174R.

The first magnet 162 and the second magnet 164 shown in fig. 2 and 3 are each a single rectangular parallelepiped member, and the first magnet 162 and the second magnet 164 are disposed over the entire surface of each of the first magnet arrangement region 162R and the second magnet arrangement region 164R. However, the first magnet 162 and the second magnetic body 174 may be separated into a plurality of portions. For example, the first magnet 162 may have a first portion that covers a part of the first magnet arrangement region 162R and a second portion that is separate from the first portion of the first magnet 162 and covers another part of the first magnet arrangement region 162R. The second magnet 164 may have a first portion that covers a part of the second magnet arrangement region 164R and a second portion that is separate from the first portion of the second magnet 164 and covers another part of the second magnet arrangement region 164R.

The first magnetic body 172 and the second magnetic body 174 shown in fig. 2 and 3 are each a single rectangular parallelepiped member, and the first magnetic body 172 and the second magnetic body 174 are disposed over the entire surface of each of the first magnetic body disposition region 172R and the second magnetic body disposition region 174R. However, the first magnetic body 172 and the second magnetic body 174 may be separated into a plurality of portions. For example, the first magnetic body 172 may have a first portion that covers a part of the first magnetic body arrangement region 172R and a second portion that is separated from the first portion of the first magnetic body 172 and covers another part of the first magnetic body arrangement region 172R. The second magnetic body 174 may have a first portion that covers a part of the second magnetic body arrangement region 174R and a second portion that is separate from the first portion of the second magnetic body 174 and covers another part of the second magnetic body arrangement region 174R.

The first swing shaft Sa1 preferably passes through the first magnet 162, the first magnetic body 172, the second magnet 164, and the second magnetic body 174, respectively. The first swing shaft Sa1 preferably passes through the center of each of the first magnet 162, the first magnetic body 172, the second magnet 164, and the second magnetic body 174. Thus, the first swing shaft Sa1 can be disposed at a position passing through the centers of the first magnet 162, the first magnetic body 172, the second magnet 164, and the second magnetic body 174, and misalignment of the movable body 120 with respect to the fixed body 110 can be suppressed.

In the case of using a coil that requires power supply as a part of the first swinging mechanism 152, the coil is preferably disposed on the fixed body 110. Therefore, as shown in fig. 3, it is preferable that the first magnet 162 and the second magnet 164 are disposed on the movable body 120, and the first magnetic body 172 and the second magnetic body 174 are disposed on the fixed body 110. Thus, even when a coil that requires power supply is used as a part of the first swinging mechanism 152, the coil can be disposed on the fixed body 110 that is easier to install in a smaller space than the movable body 120, and therefore, the optical unit 100 can be made compact.

The optical unit 100 is preferably made compact. For example, in the case where the optical unit 100 is mounted on the smart phone of fig. 1, the size of the optical unit 100 (for example, the length of the fixing body 110 in the X-axis direction or the Y-axis direction) is 10mm or more and 50mm or less.

Structure of optical unit 100

Next, the structure of the optical unit 100 according to the present embodiment will be described with reference to fig. 1 to 4. Fig. 4 is a schematic exploded perspective view of the optical unit 100 of the present embodiment.

< fixed body 110 >)

The fixed body 110 has a substantially cylindrical shape. The outer shape of the fixing body 110 is a rectangular parallelepiped shape having a substantially rectangular cross section and through holes. The fixing body 110 is made of, for example, resin. The fixing body 110 has a frame portion 111 and a side portion 112. The side portion 112 is supported by the frame portion 111. An opening 111h is formed in the frame 111.

As shown in fig. 4, the fixing body 110 has a concave surface 110q. Concave surface 110q is located on the inner peripheral surface of side portion 112. When the movable body 120 is inserted into the fixed body 110, the concave surface 110q contacts the movable body 120. Typically, when the movable body 120 swings relative to the fixed body 110, the movable body 120 slides on the concave surface 110q while contacting the concave surface 110q. Concave surface 110q preferably has a portion of a concave spherical shape.

The concave surfaces 110q are disposed at four corners of the fixed body 110. The radii of curvature of the four concave surfaces 110q may also be equal. In this case, the four concave surfaces 110q may also constitute a part of one large concave spherical surface. Alternatively, the radii of curvature of the four concave surfaces 110q may be different.

The movable body 120 also has a contact member 120A. The contact member 120A is disposed on the outer surface of the movable body 120. The contact member 120A contacts the fixed body 110. The movable body 120 contacts the fixed body 110 via the contact member 120A, and thus the movable body 120 can be stably supported with respect to the fixed body 110. Here, when the movable body 120 is inserted into the fixed body 110, the movable body 120 is in contact with the fixed body 110, but the movable body 120 may not be in contact with the fixed body 110 even if the movable body 120 is inserted into the fixed body 110.

< movable body 120 >)

The movable body 120 includes an optical element 130 and a holder 140. The optical element 130 is inserted into the frame of the holder 140.

< optical element 130 >)

The optical element 130 has a lens 132 and a housing 134. The housing 134 has a thin rectangular parallelepiped shape. The lens 132 is disposed in the housing 134. For example, the lens 132 is disposed on the optical axis P at the center of one surface of the housing 134. The optical axis P and the lens 132 face the object, and light from a direction along the optical axis P is incident on the optical element 130.

Further, an imaging element or the like may be incorporated in the housing 134. In this case, a flexible wiring board (Flexible Printed Circuit: FPC) is preferably connected to the image pickup device. The signal captured by the optical element 130 is taken out to the outside via the FPC.

< retainer 140 >

The holder 140 has a frame shape. The holder 140 surrounds the optical element 130 from the outside, and holds the optical element 130. For example, the holder 140 is formed of resin. The holder 140 has a cylindrical shape and has a through hole 140h. The optical element 130 is inserted into the through hole 140h of the holder 140.

The contact member 120A is disposed on the outer peripheral surface of the holder 140. The contact member 120A contacts the fixed body 110.

The contact member 120A has a convex portion 120c protruding toward the fixed body 110. The convex portion 120c is located radially outward of the holder 140. The convex portion 120c protrudes radially outward from the holder 140 and contacts the fixed body 110. This allows the movable body 120 to smoothly move with respect to the fixed body 110.

The convex portion 120c may have a curved shape that protrudes in a curved manner. For example, the convex portion 120c is curved in a spherical shape. The convex portion 120c may have a part of a spherical surface. This allows the movable body 120 to smoothly move with respect to the fixed body 110.

< first swing mechanism 152 >)

The first swing mechanism 152 swings the movable body 120 about the first swing axis Sa1 with respect to the fixed body 110. The first swing axis Sa1 extends parallel to the Y-axis direction.

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-X direction side with respect to the movable body 120, and the coil 152b is located on the-X direction side of the fixed body 110.

The magnet 152a is magnetized such that the magnetic poles of the surface facing radially outward (-X direction side) are different from each other with a magnetization polarization line 152m extending in the Y axis direction as a boundary. One end of the magnet 152a along the Z-axis direction has one polarity, and the other end has the other polarity.

For example, the correction of the pitch of the movable body 120 is performed as follows. When the optical unit 100 generates shake in the pitch direction, the shake is detected by a magnetic sensor (hall element), not shown, and the first swinging mechanism 152 is driven based on the result. Further, a shake detection sensor (gyroscope) or the like may be used to detect shake of the optical unit 100. Based on the detection result of the shake, the first swinging mechanism 152 corrects the shake.

< magnetite 160 >, a magnetic field

The magnet 160 generates a magnetic field. Typically, the magnet 160 is a permanent magnet. Here, the magnet 160 includes a first magnet 162 and a second magnet 164. The first magnet 162 and the second magnet 164 are mounted on the side surfaces of the holder 140, respectively, and are located on the outer side surfaces of the movable body 120.

The first magnet 162 is located on the-Y direction side with respect to the movable body 120, and extends in the X axis direction. The second magnet 164 is located on the +y direction side with respect to the movable body 120, and extends in the X axis direction.

< magnetic substance 170 >)

The magnetic body 170 is disposed to face the magnet 160. The magnetic body 170 includes a first magnetic body 172 and a second magnetic body 174. The first magnetic body 172 is located on the-Y direction side with respect to the movable body 120, and faces the first magnet 162. The second magnetic body 174 is located on the +y direction side with respect to the movable body 120, and faces the second magnet 164.

The first magnetic body 172 and the second magnetic body 174 are preferably soft magnetic bodies. Since both the first magnetic body 172 and the second magnetic body 174 are soft magnetic bodies, the first magnet 162 and the second magnet 164 can be attracted to predetermined positions by a weaker magnetic action than in the case where the first magnetic body 172 and the second magnetic body 174 are permanent magnets. Therefore, even if the driving force from the first swinging mechanism 152 is weak, the movable body 120 can be appropriately moved.

The first magnet 162 has a shape extending parallel to the longitudinal direction. The first magnetic body 172 has a shape extending in a longitudinal direction parallel to the longitudinal direction of the first magnet 162. Since the first magnet 162 and the first magnetic body 172 extend in the same direction, the magnetic action of the first magnet 162 on the first magnetic body 172 can be effectively utilized.

Similarly, the second magnet 164 has a shape extending parallel to the longitudinal direction. The second magnetic body 174 has a shape extending in a longitudinal direction parallel to the longitudinal direction of the second magnet 164. Since the second magnet 164 and the second magnetic body 174 extend in the same direction, the magnetic action of the second magnet 164 with respect to the second magnetic body 174 can be effectively utilized.

As understood from fig. 4, the movable body 120 is manufactured by inserting the optical element 130 into the holder 140. A first magnet 162 and a second magnet 164 are arranged along the Y-axis direction on the outer side surface of the movable body 120.

The first magnetic body 172 and the second magnetic body 174 are disposed on the fixed body 110 along the Y-axis direction. When the movable body 120 is inserted into the fixed body 110, the first magnet 162 faces the first magnetic body 172, and the second magnet 164 faces the second magnetic body 174. Accordingly, as described above with reference to fig. 3, the first swing shaft Sa1 passes through the first magnet 162, the first magnetic body 172, the second magnet 164, and the second magnetic body 174, respectively. Therefore, the direction of magnetic attraction between the fixed body 110 and the movable body 120 due to the group of the first magnet 162 and the first magnetic body 172 and the group of the second magnet 164 and the second magnetic body 174 coincides with the first swing axis Sa 1. Therefore, when the movable body 120 swings about the first swing axis Sa1, the movable body 120 can be stably swung.

＜FPC180＞

The FPC180 is mounted to the stationary body 110. Typically, the FPC180 is fitted to the outer circumferential surface of the stationary body 110. The FPC180 supplies power to the coil 152 b. The FPC180 covers three sides of the four sides 112 of the stationary body 110.

In fig. 4, the coil 152b is separated from the FPC180, but the coil 152b may be mounted on the FPC180. For example, the coil 152b is mounted on the inner side (+x direction side) of the FPC180.

The first magnetic body 172 and the second magnetic body 174 may be attached to the FPC180. For example, the first magnetic body 172 may be disposed outside the FPC180 (-Y direction side), and the second magnetic body 174 may be disposed outside the FPC180 (+y direction side). However, the first magnetic body 172 and the second magnetic body 174 may be disposed inside the FPC180. In this case, the first magnetic body 172 may be located between the FPC180 and the first magnet 162, and the second magnetic body 174 may be located between the FPC180 and the second magnet 164.

< cover 100L >)

The cover 100L covers the fixed body 110 and the movable body 120. The cover 100L is formed of, for example, resin. The cover 100L is a plate-like member having a thickness in the Z-axis direction. The cover 100L is fixed to the +z direction side (optical axis direction side) of the fixed body 110. In the present embodiment, the cover 100L is fixed to the frame 111 of the fixed body 110. The structure for fixing the cover 100L to the fixing body 110 is not particularly limited. The cover 100L may be fixed to the fixed body 110 using a fastening member such as a bolt, or may be fixed to the fixed body 110 using an adhesive.

The cover portion 100L has a hole 100h and a rotation stopper portion 100s. The hole 100h penetrates the cover 100L in the Z-axis direction. The hole 100h of the cover 100L faces the opening 111h of the fixed body 110. The lens 132 of the movable body 120 is exposed to the outside of the fixed body 110 through the opening 111h of the fixed body 110 and the hole 100h of the cover 100L.

As described above, the fixed body 110 has the concave surface 110q in the region contacting the convex portion 120c of the movable body 120. Further, the concave surface 110q has a part of a concave spherical shape. Therefore, the movable body 120 can be smoothly moved with respect to the fixed body 110.

Next, an optical unit 100 according to the present embodiment will be described with reference to fig. 1 to 5A. Fig. 5A is a schematic perspective view of the first swinging mechanism 152, the magnet 160, and the magnetic body 170 in the optical unit 100 shown in fig. 4.

As shown in fig. 5A, the first swinging mechanism 152 has a magnet 152a and a coil 152b. The magnets 152a are magnetized such that the magnetic poles of the radially outward faces are different from each other with the magnetization polarization line 152m extending in the Y-axis direction as a boundary. One end of the magnet 152a along the Z-axis direction has one polarity, and the other end has the other polarity.

By controlling the direction and magnitude of the current flowing to the coil 152b, the direction and magnitude of the magnetic field generated from the coil 152b can be changed. Therefore, the first swinging mechanism 152 can swing the movable body 120 about the first swinging axis Sa1 by interaction between the magnetic field generated from the coil 152b and the magnet 152 a.

In the above description with reference to fig. 2 to 5A, the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 have rectangular parallelepiped shapes, and the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 cover the entire surfaces of the first magnet arrangement region 162R, the second magnet arrangement region 164R, the first magnetic body arrangement region 172R, and the second magnetic body arrangement region 174R, respectively, but the present embodiment is not limited thereto. The first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 may partially cover the first magnet arrangement region 162R, the second magnet arrangement region 164R, the first magnetic body arrangement region 172R, and the second magnetic body arrangement region 174R, respectively.

Next, an optical unit 100 according to the present embodiment will be described with reference to fig. 1 to 5B. Fig. 5B is a schematic perspective view of the first swinging mechanism 152, the magnet 160, and the magnetic body 170 in the optical unit 100. The optical unit 100 of fig. 5B has the same structure as the optical unit 100 described above with reference to fig. 5A except that the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 are provided with through holes, and overlapping description is omitted for the purpose of avoiding redundancy.

As shown in fig. 5B, through holes are provided in the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174, respectively. For example, the through holes of the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 are provided in the centers of the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174. Therefore, the first swing shaft Sa1 does not pass through the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174.

Even in this case, the direction of magnetic attraction between the fixed body 110 and the movable body 120 due to the group of the first magnet 162 and the first magnetic body 172 and the group of the second magnet 164 and the second magnetic body 174 coincides with the first swing axis Sa 1. Therefore, when the movable body 120 swings about the first swing axis Sa1, the movable body 120 can be stably swung.

In fig. 5B, through holes are provided in the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174, respectively, but the present embodiment is not limited thereto. The first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 may be provided with through holes.

In fig. 5B, a through hole is provided in the center of each of the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174, but the present embodiment is not limited thereto. The areas of the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 that do not cover the first magnet arrangement area 162R, the second magnet arrangement area 164R, the first magnetic body arrangement area 172R, and the second magnetic body arrangement area 174R may not be the centers of the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174. However, it is preferable that the areas of the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174, which do not cover the first magnet arrangement region 162R, the second magnet arrangement region 164R, the first magnetic body arrangement region 172R, and the second magnetic body arrangement region 174R, respectively, be small.

In the above description with reference to fig. 2 to 5A, the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 are rectangular parallelepiped shapes, and the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 are disposed over the entire surfaces of the first magnet arrangement region 162R, the second magnet arrangement region 164R, the first magnetic body arrangement region 172R, and the second magnetic body arrangement region 174R, respectively, but the present embodiment is not limited thereto. The first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174 may have a plurality of portions separated from each other.

Next, an optical unit 100 according to the present embodiment will be described with reference to fig. 1 to 6A. Fig. 6A is a schematic perspective view of the first swinging mechanism 152, the magnet 160, and the magnetic body 170 in the optical unit 100. The optical unit 100 of fig. 6A has the same configuration as the optical unit 100 described above with reference to fig. 5A except that the first magnet 162 and the second magnet 164 are separated into a plurality of portions, and overlapping description is omitted for the purpose of avoiding redundancy.

As shown in fig. 6A, the first magnet 162 has a first portion 162a and a second portion 162b. The first portion 162a is located at a position separated toward the +y direction side from the second portion 162b. Further, the side surface on the +x direction side of the first portion 162a and the side surface on the-X direction side of the second portion 162b may overlap each other as viewed from the first swing axis Sa 1. In this case, the entire surface of the first magnet arrangement region 162R of the first magnet 162 is covered with the first portion 162a and the second portion 162b.

Also, the second magnet 164 has a first portion 164a and a second portion 164b. The first portion 164a is located at a position separated toward the +y direction side with respect to the second portion 164b. Further, the side surface on the +x direction side of the first portion 164a and the side surface on the-X direction side of the second portion 164b may overlap as viewed from the first swing axis Sa 1. In this case, the entire surface of the second magnet arrangement region 164R of the second magnet 164 is covered with the first portion 164a and the second portion 164b.

In the above description with reference to fig. 6A, the first magnet 162 is separated into the first portion 162a and the second portion 162b, and the second magnet 164 is separated into the first portion 164a and the second portion 164b. One of the first magnet 162 and the second magnet 164 may be separated into a plurality of portions.

In the above description with reference to fig. 6A, the first magnet 162 and the second magnet 164 are separated, but the present embodiment is not limited thereto. The first magnetic body 172 and the second magnetic body 174 may have a plurality of portions separated from each other.

Next, an optical unit 100 according to the present embodiment will be described with reference to fig. 1 to 6B. Fig. 6B is a schematic perspective view of the first swinging mechanism 152, the magnet 160, and the magnetic body 170 in the optical unit 100. The optical unit 100 of fig. 6B has the same configuration as the optical unit 100 described above with reference to fig. 6A except that the first magnet 162 and the second magnet 164 are separated into a plurality of portions instead of the first magnet 172 and the second magnet 174, and redundant description is omitted for the purpose of avoiding redundancy.

As shown in fig. 6B, the first magnetic body 172 includes a first portion 172a and a second portion 172B. The first portion 172a is located at a position separated toward the +y direction side with respect to the second portion 172b. Further, the side surface on the +x direction side of the first portion 172a and the side surface on the-X direction side of the second portion 172b may overlap each other as viewed from the first swing axis Sa 1. In this case, the entire surface of the first magnetic body arrangement region 172R of the first magnetic body 172 is covered with the first portion 172a and the second portion 172b.

Likewise, the second magnetic body 174 has a first portion 174a and a second portion 174b. The first portion 174a is located at a position separated toward the +y direction side with respect to the second portion 174b. Further, the side surface on the +x direction side of the first portion 174a and the side surface on the-X direction side of the second portion 174b may overlap each other as viewed from the first swing axis Sa 1. In this case, the entire surface of the second magnetic body arrangement region 174R of the second magnetic body 174 is covered with the first portion 174a and the second portion 174b.

In the above description with reference to fig. 6B, the first magnetic body 172 is separated into the first portion 172a and the second portion 172B, and the second magnetic body 174 is separated into the first portion 174a and the second portion 174B, but the present embodiment is not limited thereto. One of the first magnetic body 172 and the second magnetic body 174 may be separated into a plurality of portions.

In fig. 4 to 6B, the magnetization polarization line 152m of the magnet 152a extends in the Y direction, and the magnetic poles of the magnet 152a are aligned in the optical axis direction, but the magnetic poles of the first magnet 162 and the second magnet 164 may be aligned in the optical axis direction, or may be aligned in the radial direction. However, unlike the magnet 152a, the magnetic poles of the first magnet 162 that do not face the coil are preferably arranged in the radial direction, and the magnetization polarization line of the first magnet 162 is preferably arranged parallel to the XZ plane, and the magnetization polarization line is not provided on the face of the first magnet 162 that faces the movable body 120. This can prevent excessive torque from being generated and enhance the magnetic attraction force between the first magnet 162 and the first magnetic body 172. Similarly, it is preferable that the magnetic poles of the second magnet 164 not facing the coil be arranged in the radial direction, that the magnetization polarization line of the second magnet 164 be arranged parallel to the XZ plane, and that the magnetization polarization line be not provided on the surface of the second magnet 164 facing the movable body 120.

In the optical unit 100 described above with reference to fig. 3 to 6B, the movable body 120 is stably swung about the first swing axis Sa1 with respect to the fixed body 110 by the first swing mechanism 152 by the group of the first magnet 162 and the first magnetic body 172 and the group of the second magnet 164 and the second magnetic body 174, but the present embodiment is not limited thereto. The movable body 120 may be stably swung about an axis different from the first swing axis Sa1 with respect to the fixed body 110. The magnet 160 may also be used as a part of the swinging mechanism.

Next, the optical unit 100 according to the present embodiment will be described with reference to fig. 3 to 7. Fig. 7 is a schematic perspective view of the first swing mechanism 152, the second swing mechanism 154, the magnet 160, and the magnetic body 170 in the optical unit 100 of the present embodiment. The optical unit 100 of fig. 7 has the same configuration as the optical unit 100 described above with reference to fig. 5A in that the optical unit 100 further includes the second swinging mechanism 154 using the first magnet 162, and further includes the third magnet 166 and the third magnetic body 176 for the first swinging mechanism 152, and overlapping description is omitted for the purpose of avoiding redundancy.

As shown in fig. 7, the magnet 160 includes a third magnet 166 in addition to the first magnet 162 and the second magnet 164. The magnetic body 170 includes a third magnetic body 176 in addition to the first magnetic body 172 and the second magnetic body 174. The first magnetic body 172, the second magnetic body 174, and the third magnetic body 176 face the first magnet 162, the second magnet 164, and the third magnet 166, respectively. Thus, one of the fixed body 110 and the movable body 120 further includes the third magnet 166, and the other of the fixed body 110 and the movable body 120 further includes the third magnetic body 176 facing the third magnet 166. Here, the movable body 120 further includes a third magnet 166, and the fixed body 110 further includes a third magnetic body 176.

The first magnet 162 is located on the-Y direction side with respect to the movable body 120. The second magnet 164 is located on the +y direction side with respect to the movable body 120. The third magnet 166 is located on the-X direction side with respect to the movable body 120.

The first magnetic body 172 is located on the-Y direction side with respect to the movable body 120. The second magnetic body 174 is located on the +y direction side with respect to the movable body 120. The third magnetic body 176 is located on the-X direction side with respect to the movable body 120.

The first swinging mechanism 152 swings the movable body 120 relative to the fixed body 110. Specifically, 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 shaft Sa1 extends parallel to the Y-axis direction. The Y-axis direction is a direction intersecting the optical axis P, and is a rotational axis in the pitch direction.

The first swinging mechanism 152 uses a magnet 160. Here, the first swinging mechanism 152 includes a third magnet 166 and a coil 152b. The third magnet 166 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the third magnetization polarization line 166m extending in the Y-axis direction as a boundary. One end of the third magnet 166 along the Z-axis direction has one polarity, and the other end has the other polarity.

By controlling the direction and magnitude of the current flowing to the coil 152b, the direction and magnitude of the magnetic field generated from the coil 152b can be changed. Therefore, the first swinging mechanism 152 can swing the movable body 120 about the first swinging axis Sa1 by interaction between the magnetic field generated from the coil 152b and the third magnet 166.

The optical unit 100 includes a second swinging mechanism 154 in addition to the first swinging mechanism 152. The second swinging mechanism 154 swings the movable body 120 about the second swinging axis Sa2 with respect to the fixed body 110. The second swing axis Sa2 is orthogonal to the first swing axis Sa 1. For example, the second swing axis Sa2 extends parallel to the X-axis direction. The X-axis direction is a direction intersecting the optical axis P, and is an axis of rotation in the yaw direction.

The second swinging mechanism 154 may be composed of a magnet and a coil. Alternatively, the first swinging mechanism 152 may swing the movable body 120 with respect to the fixed body 110 by supplying an electric signal to the shape memory alloy.

In fig. 7, the second swinging mechanism 154 uses a magnet 160. Here, the second swinging mechanism 154 includes a first magnet 162 and a coil 154b. The first magnet 162 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the first magnetization polarization line 162m extending in the X-axis direction as a boundary. One end of the first magnet 162 along the Z-axis direction has one polarity, and the other end has the other polarity.

By controlling the direction and magnitude of the current flowing to the coil 154b, the direction and magnitude of the magnetic field generated from the coil 154b can be changed. Therefore, the second swinging mechanism 154 can swing the movable body 120 about the second swinging axis Sa2 by interaction of the magnetic field generated from the coil 154b and the first magnet 162.

Thus, the first swinging mechanism 152 includes the third magnet 166 and the coil 152b facing the third magnet 166. The second swinging mechanism 154 includes a first magnet 162 and a coil 154b facing the first magnet 162. Therefore, the third magnet 166 and the first magnet 162 for stably swinging the first movable body 10 can be used for the first swinging mechanism 152 and the second swinging mechanism 154.

The second swing shaft Sa2 passes through the third magnet 166 and the third magnetic body 176, respectively. Therefore, the movable body 120 can be swung about two swing axes (the first swing axis Sa1 and the second swing axis Sa 2) with respect to the fixed body 110.

In the optical unit 100 described above with reference to fig. 7, the first swing axis Sa1 is configured to pass through the first magnet 162, the second magnet 164, the first magnetic body 172, and the second magnetic body 174, respectively, while the second swing axis Sa2 is configured to pass through the third magnet 166 and the third magnetic body 176, respectively, but the present embodiment is not limited thereto. The second swing shaft Sa2 may pass through a plurality of magnets and a plurality of magnetic bodies.

Next, the optical unit 100 according to the present embodiment will be described with reference to fig. 3 to 8A. Fig. 8A is a schematic perspective view of the first swing mechanism 152, the second swing mechanism 154, the magnet 160, and the magnetic body 170 in the optical unit 100 of the present embodiment. The optical unit 100 of fig. 8A includes the fourth magnet 168 in addition to the magnet 160, and the magnetic body 170 includes the fourth magnetic body 178, and has the same structure as the optical unit 100 described above with reference to fig. 7, and for the purpose of avoiding redundancy, duplicate description is omitted.

The magnet 160 includes a fourth magnet 168 in addition to the first magnet 162, the second magnet 164, and the third magnet 166. The first magnet 162 is located on the-Y direction side with respect to the movable body 120, and the second magnet 164 is located on the +y direction side with respect to the movable body 120. The third magnet 166 is located on the-X direction side with respect to the movable body 120, and the fourth magnet 168 is located on the +x direction side with respect to the movable body 120.

The magnetic body 170 includes a fourth magnetic body 178 in addition to the first magnetic body 172, the second magnetic body 174, and the third magnetic body 176. The first magnetic body 172, the second magnetic body 174, the third magnetic body 176, and the fourth magnetic body 178 face the first magnet 162, the second magnet 164, the third magnet 166, and the fourth magnet 168, respectively. The first magnetic body 172 is located on the-Y direction side with respect to the movable body 120, and the second magnetic body 174 is located on the +y direction side with respect to the movable body 120. The third magnetic body 176 is located on the-X direction side with respect to the movable body 120, and the fourth magnetic body 178 is located on the +x direction side with respect to the movable body 120.

Thus, one of the fixed body 110 and the movable body 120 further includes the fourth magnet 168, and the other of the fixed body 110 and the movable body 120 further includes the fourth magnetic body 178 facing the fourth magnet 168. The second swing shaft Sa2 passes through not only the third magnet 166 and the third magnetic body 176 but also the fourth magnet 168 and the fourth magnetic body 178. Therefore, the position of the movable body 120 with respect to the fixed body 110 can be restricted.

Here, the first magnetization polarization line 162m of the first magnet 162 extends parallel to the second magnetization polarization line 164m of the second magnet 164. Specifically, the first magnet 162 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the first magnetization polarization line 162m extending in the X-axis direction as a boundary. One end of the first magnet 162 along the Z-axis direction has one polarity, and the other end has the other polarity. Similarly, the second magnet 164 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the second magnetization polarization line 164m extending in the X-axis direction as a boundary. One end of the second magnet 164 in the Z-axis direction has one polarity, and the other end has the other polarity.

The third magnetization polarization line 166m of the third magnet 166 extends parallel to the fourth magnetization polarization line 168m of the fourth magnet 168. Specifically, the third magnet 166 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the third magnetization polarization line 166m extending in the Y-axis direction as a boundary. One end of the third magnet 166 along the Z-axis direction has one polarity, and the other end has the other polarity. Similarly, the fourth magnet 168 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the fourth magnetization polarization 168m extending in the Y-axis direction as a boundary. One end of the fourth magnet 168 along the Z-axis direction has one polarity, and the other end has the other polarity.

However, the first magnetization polarization line 162m of the first magnet 162 may not be parallel to the second magnetization polarization line 164m of the second magnet 164, and the direction in which the first magnetization polarization line 162m of the first magnet 162 extends may be offset from the direction in which the second magnetization polarization line 164m of the second magnet 164 extends. In this case, it is preferable that the direction in which the first magnetization polarization line 162m of the first magnet 162 extends be offset by 90 ° with respect to the direction in which the second magnetization polarization line 164m of the second magnet 164 extends. This can further reduce the frictional resistance when the movable body 120 swings about the second swing axis Sa 2.

In fig. 8A, the first swinging mechanism 152 includes the third magnet 166 and the coil 152b facing the third magnet 166, but the first swinging mechanism 152 may include the fourth magnet 168 and the coil 152b facing the fourth magnet 168. In this way, the first swinging mechanism 152 may include at least one of the third magnet 166 and the fourth magnet 168 and a coil facing the at least one magnet.

In fig. 8A, the second swinging mechanism 154 includes the first magnet 162 and the coil 154b facing the first magnet 162, but the second swinging mechanism 154 may include the second magnet 164 and the coil 152b facing the second magnet 164. In this way, the second swinging mechanism 154 may include at least one of the first magnet 162 and the second magnet 164 and a coil facing the at least one magnet. Therefore, at least one of the first magnet 162 and the second magnet 164 that determine the first swing axis Sa1 and at least one of the third magnet 166 and the fourth magnet 168 that determine the second swing axis Sa2 can be used for the first swing mechanism 152 and the second swing mechanism 154.

In the above description with reference to fig. 3 to 8A, the movable body 120 swings about one swing axis (the first swing axis Sa 1) or two orthogonal swing axes (the first swing axis Sa1 and the second swing axis Sa 2) with respect to the fixed body 110, but the present embodiment is not limited thereto. The movable body 120 may also swing around three swing axes with respect to the fixed body 110.

Next, the structure of the optical unit 100 according to the present embodiment will be described with reference to fig. 8B. Fig. 8 is a schematic perspective view of the first swing mechanism 152, the second swing mechanism 154, the third swing mechanism 156, the magnet 160, and the magnetic body 170 in the optical unit 100 of the present embodiment. The optical unit 100 of fig. 8B has the same configuration as the optical unit 100 described above with reference to fig. 8A except that the first swing mechanism 152 and the second swing mechanism 154 are provided with a third swing mechanism 156, and overlapping description is omitted for the purpose of avoiding redundancy.

As shown in fig. 8B, the optical unit 100 includes a third swing mechanism 156 in addition to the first swing mechanism 152 and the second swing mechanism 154. The third swinging mechanism 156 swings the movable body 120 relative to the fixed body 110. Specifically, the third swinging mechanism 156 swings the movable body 120 about the third swinging axis Sa3 with respect to the fixed body 110. Here, the third swing axis Sa3 extends parallel to the Z axis direction. The Z-axis direction is parallel to the optical axis P and is the axis of rotation in the tumble direction.

The first swinging mechanism 152 includes a third magnet 166 and a coil 152b. The third magnet 166 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the third magnetization polarization line 166m extending in the Y-axis direction as a boundary. One end of the third magnet 166 along the Z-axis direction has one polarity, and the other end has the other polarity.

Here, the second swinging mechanism 154 includes a second magnet 164 and a coil 154b. The second magnet 164 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the second magnetization polarization line 164m extending in the X-axis direction as a boundary. One end of the second magnet 164 in the Z-axis direction has one polarity, and the other end has the other polarity.

Here, the third swinging mechanism 156 includes a first magnet 162 and a coil 156b. The first magnet 162 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the first magnetization polarization line 162m extending in the Z-axis direction as a boundary. One end of the first magnet 162 along the X-axis direction has one polarity, and the other end has the other polarity.

The fourth magnet 168 is magnetized such that the magnetic poles of the radially outward surface are different from each other with respect to a fourth magnetization polarization 168m extending in the Z-axis direction. One end of the fourth magnet 168 along the Y-axis direction has one polarity, and the other end has the other polarity.

In the optical unit 100 shown in fig. 8B, the movable body 120 can be swung in the pitch direction by the first swinging mechanism 152, the movable body 120 can be swung in the yaw direction by the second swinging mechanism 154, and the movable body 120 can be swung in the roll direction by the third swinging mechanism 156. Therefore, in the optical unit 100, the movable body 120 can be corrected in an arbitrary direction.

In the optical unit 100 shown in fig. 8B, the direction in which the first magnetization polarization line 162m extends is offset from the direction in which the second magnetization polarization line 164m extends, and the direction in which the third magnetization polarization line 166m extends is offset from the direction in which the fourth magnetization polarization line 168m of the fourth magnet 168 extends. Typically, it is preferable that the direction of extension of the first magnetization polarization line 162m is offset by 90 ° with respect to the direction of extension of the second magnetization polarization line 164m, and the direction of extension of the third magnetization polarization line 166m is offset by 90 ° with respect to the direction of extension of the fourth magnetization polarization line 168 m. This can further reduce the frictional resistance when the movable body 120 swings about the first swing axis Sa1 and the second swing axis Sa 2.

Further, it is preferable that one or more coils are opposed to three magnets among the first magnet 162, the second magnet 164, the third magnet 166, and the fourth magnet 168, respectively. Here, the first magnet 162, the second magnet 164, and the third magnet 166 are opposed to the coil 156b, the coil 154b, and the coil 152b, respectively.

The direction in which the first magnetization polarization line 162m of the first magnet 162 of the three magnets (the first magnet 162, the second magnet 164, and the third magnet 166 extends is parallel to the optical axis P of the optical element 130, and the direction in which the second magnetization polarization line 164m of the remaining second magnet 164 extends and the direction in which the third magnetization polarization line 166m of the third magnet 166 extends are orthogonal to the optical axis P. Thereby, the movable body 120 can be swung along the three swing axes (the first swing axis Sa1, the second swing axis Sa2, and the third swing axis Sa 3).

In the above description with reference to fig. 3 to 8B, the first swinging mechanism 152 is disposed radially outward of the movable body 120, but the present embodiment is not limited thereto. The first swinging mechanism 152 may be disposed along the optical axis direction with respect to the movable body 120.

Next, the optical unit 100 according to the present embodiment will be described with reference to fig. 3 to 9A. Fig. 9A is a schematic perspective view of the first swinging mechanism 152, the magnet 160, and the magnetic body 170 in the optical unit 100 of the present embodiment. The optical unit 100 of fig. 9A has the same configuration as the optical unit 100 described above with reference to fig. 5A except that the first swinging mechanism 152 is disposed in the optical axis direction with respect to the movable body 120, and for the purpose of avoiding redundancy, a repetitive description is omitted.

As shown in fig. 9A, the optical unit 100 includes a first swing mechanism 152. The first swinging mechanism 152 swings the movable body 120 relative to the fixed body 110. Specifically, 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 shaft Sa1 extends parallel to the Y-axis direction. The Y-axis direction is a direction intersecting the optical axis P, and is a rotational axis in the pitch direction.

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-Z direction side with respect to the movable body 120, and the coil 152b is located at the bottom of the-Z direction side of the fixed body 110.

The magnet 152a is magnetized such that the magnetic poles of the surface facing radially outward (-Z direction side) are different from each other with a magnetization polarization line 152m extending in the Y axis direction as a boundary. One end of the magnet 152a along the X-axis direction has one polarity, and the other end has the other polarity.

In the above description with reference to fig. 9A, the movable body 120 is stably swung about the first swing axis Sa1 with respect to the fixed body 110 by the first swing mechanism 152, but the present embodiment is not limited thereto. The movable body 120 may be stably swung about an axis different from the first swing axis Sa1 with respect to the fixed body 110. The magnet 160 may also be used as a part of the swinging mechanism.

Next, the optical unit 100 according to the present embodiment will be described with reference to fig. 3 to 9B. Fig. 9B is a schematic perspective view of the first swing mechanism 152, the second swing mechanism 154, the third swing mechanism 156, the magnet 160, and the magnetic body 170 in the optical unit 100 of the present embodiment. The optical unit 100 of fig. 9B has the same configuration as the optical unit 100 described above with reference to fig. 9A except that the second swing mechanism 154 and the third swing mechanism 156 are further provided, and for the sake of avoiding redundancy, a redundant description is omitted.

The optical unit 100 includes a first swing mechanism 152, a second swing mechanism 154, and a third swing mechanism 156. The magnet 160 includes a third magnet 166 in addition to the first magnet 162 and the second magnet 164. The first magnet 162 is located on the-Y direction side with respect to the movable body 120. The second magnet 164 is located on the +y direction side with respect to the movable body 120. The third magnet 166 is located on the-Z direction side with respect to the movable body 120.

The magnetic body 170 includes a third magnetic body 176 in addition to the first magnetic body 172 and the second magnetic body 174. The first magnetic body 172, the second magnetic body 174, and the third magnetic body 176 face the first magnet 162, the second magnet 164, and the third magnet 166, respectively. The first magnetic body 172 is located on the-Y direction side with respect to the movable body 120. The second magnetic body 174 is located on the +y direction side with respect to the movable body 120. The third magnetic body 176 is located on the-Z direction side with respect to the movable body 120.

The first swing mechanism 152 swings the movable body 120 about the first swing axis Sa1 with respect to the fixed body 110. The first swing axis Sa1 extends parallel to the Y-axis direction. The Y-axis direction is a direction intersecting the optical axis P, and is a rotational axis in the pitch direction.

The first swinging mechanism 152 includes a third magnet 166 and a coil 152b facing the third magnet 166. The third magnet 166 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the third magnetization polarization line 166m extending in the Y-axis direction as a boundary. One end of the third magnet 166 along the X-axis direction has one polarity, and the other end has the other polarity.

The second swinging mechanism 154 swings the movable body 120 about the second swinging axis Sa2 with respect to the fixed body 110. The second swing axis Sa2 is orthogonal to the first swing axis Sa 1. The second swing axis Sa2 extends parallel to the X-axis direction. The X-axis direction is a direction intersecting the optical axis P, and is an axis of rotation in the yaw direction.

The second swinging mechanism 154 includes a second magnet 164 and a coil 154b facing the second magnet 164. The second magnet 164 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the second magnetization polarization line 164m extending in the X-axis direction as a boundary. One end of the second magnet 164 in the Z-axis direction has one polarity, and the other end has the other polarity.

The third swinging mechanism 156 swings the movable body 120 about the third swinging axis Sa3 with respect to the fixed body 110. The third swing axis Sa3 is orthogonal to the first swing axis Sa1 and the second swing axis Sa 2. The third swing axis Sa3 extends parallel to the Z-axis direction. The Z-axis direction is parallel to the optical axis P and is the axis of rotation in the tumble direction.

The third swinging mechanism 156 includes a first magnet 162 and a coil 156b facing the first magnet 162. The first magnet 162 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the first magnetization polarization line 162m extending in the Z-axis direction as a boundary. One end of the first magnet 162 along the X-axis direction has one polarity, and the other end has the other polarity.

In the optical unit 100 shown in fig. 9B, the first swinging mechanism 152 can be arranged in the optical axis direction with respect to the movable body 120, and the movable body 120 can be swung about three orthogonal swinging axes (the first swinging axis Sa1, the second swinging axis Sa2, and the third swinging axis Sa 3).

Structure of optical unit 100

Next, the structure of the optical unit 100 according to the present embodiment will be described with reference to fig. 8B and 10. Fig. 10 is a schematic exploded perspective view of the optical unit 100 of the present embodiment.

As shown in fig. 10, the magnets 160 include a first magnet 162, a second magnet 164, a third magnet 166, and a fourth magnet 168. Here, the magnet 160 is attached to the outer peripheral surface of the holder 140. The first magnet 162 is located on the-Y direction side with respect to the holder 140. The second magnet 164 is located on the +y direction side with respect to the holder 140. The third magnet 166 is located on the-X direction side with respect to the holder 140. The fourth magnet 168 is located on the +x direction side with respect to the holder 140.

The magnetic body 170 includes a first magnetic body 172, a second magnetic body 174, a third magnetic body 176, and a fourth magnetic body 178. Here, the magnetic body 170 is mounted to the fixed body 110 or the FPC180. The first magnetic body 172 is located on the-Y direction side with respect to the FPC180. The second magnetic body 174 is located on the +y direction side with respect to the FPC180. The third magnetic body 176 is located on the-X direction side with respect to the FPC180. The fourth magnetic body 178 is located on the +x direction side of the inner side surface of the fixed body 110.

The first swinging mechanism 152 includes a third magnet 166 and a coil 152b facing the third magnet 166. The third magnet 166 and the coil 152b are located on the-X direction side with respect to the movable body 120.

The second swinging mechanism 154 includes a second magnet 164 and a coil 154b facing the second magnet 164. The second magnet 164 and the coil 154b are located on the +y direction side with respect to the movable body 120.

The third swinging mechanism 156 includes a first magnet 162 and a coil 156b facing the first magnet 162. The first magnet 162 and the coil 156b are located on the-Y direction side with respect to the movable body 120.

For example, correction of the pitch, yaw, and roll of the movable body 120 is performed as follows. When the optical unit 100 generates shake in at least one of the pitch direction, the yaw direction, and the roll direction, the shake is detected by a magnetic sensor (hall element), not shown, and the first swing mechanism 152, the second swing mechanism 154, and the third swing mechanism 156 are driven based on the result to swing the movable body 120. Further, a shake detection sensor (gyroscope) or the like may be used to detect shake of the optical unit 100. Based on the detection result of the shake, a current is supplied to the coil 152b, the coil 154b, and the coil 156b, and the shake is corrected.

Next, the optical unit 100 will be described in more detail with reference to fig. 8B, 10, 11A, and 11B. Fig. 11A is a schematic plan view of the movable body 120 and the magnet 160, and fig. 11B is a schematic plan view of the fixed body 110. In fig. 11A, for reference, a magnetic body 170 is shown with a two-dot chain line.

As described above, the holder 140 has a cylindrical shape and has the through hole 140h (fig. 10). Although not shown in fig. 11A, the optical element 130 is inserted into the through hole 140h of the holder 140. The holder 140 is inserted into the fixing body 110 (fig. 2, 10, and 11B).

The movable body 120 has a plurality of side portions and a connecting portion connecting the adjacent side portions. Specifically, the movable body 120 includes a first side 122, a second side 124, a third side 126, a fourth side 128, a first connecting portion 123, a second connecting portion 125, a third connecting portion 127, and a fourth connecting portion 129.

The first side 122 is located on the-Y direction side with respect to the optical element 130, and extends along the outer side surface of the movable body 120 in the X axis direction. The second side portion 124 is located on the +x direction side with respect to the optical element 130, and extends along the outer side surface of the movable body 120 in the Y axis direction. The third side portion 126 is located on the +y direction side with respect to the optical element 130, and extends along the outer side surface of the movable body 120 in the X axis direction. The fourth side portion 128 is located on the-X direction side with respect to the optical element 130, and extends along the outer side surface of the movable body 120 in the Y-axis direction.

The first side 122 and the third side 126 are disposed parallel to each other. The second side 124 and the fourth side 128 are arranged parallel to each other. The first side 122, the second side 124, the third side 126, and the fourth side 128 are arranged in the order of the first side 122, the second side 124, the third side 126, and the fourth side 128 in the circumferential direction S with respect to the optical axis P. Further, a first magnet 162 is disposed on the outer side surface of the first side portion 122, and a second magnet 164 is disposed on the outer side surface of the third side portion 126. The third magnet 166 is disposed on the outer side surface of the fourth side portion 128, and the fourth magnet 168 is disposed on the outer side surface of the second side portion 124.

The first, second, third and

fourth connection portions

123, 125, 127 and 129 connect adjacent ones of the first, second, third and

fourth side portions

122, 124, 126 and 128. The first connection portion 123 is interposed between the first and second side portions 122 and 124, thereby connecting the first and second side portions 122 and 124. The second connection portion 125 is interposed between the second side portion 124 and the third side portion 126, thereby connecting the second side portion 124 and the third side portion 126. The third connecting portion 127 is interposed between the third side portion 126 and the fourth side portion 128, thereby connecting the third side portion 126 and the fourth side portion 128. The fourth connection portion 129 is interposed between the fourth side portion 128 and the first side portion 122, thereby connecting the fourth side portion 128 and the first side portion 122. The first connecting portion 123 and the third connecting portion 127 are arranged parallel to each other. The second connecting portion 125 and the fourth connecting portion 129 are arranged parallel to each other.

The movable body 120 has an outer side surface 120p facing the fixed body 110. The outer side surface 120p includes a first outer side surface 122p, a second outer side surface 124p connected to the first outer side surface 122p, a third outer side surface 126p connected to the second outer side surface 124p, a fourth outer side surface 128p connected to the third outer side surface 126p and the first outer side surface 122p, a first corner 123p, a second corner 125p, a third corner 127p, and a fourth corner 129p.

The first magnet 162 is disposed on the first outer side surface 122p, and the second magnet 164 is disposed on the third outer side surface 126p. The first magnet 162 and the second magnet 164 can be easily arranged at predetermined positions.

Further, the third magnet 166 is disposed on the fourth outer surface 128p, and the fourth magnet 168 is disposed on the second outer surface 124p. The third magnet 166 and the fourth magnet 168 can be easily arranged at predetermined positions.

The first, second, third and fourth

outer side surfaces

122p, 124p, 126p, 128p are outer side surfaces of the first, second, third and

fourth side portions

122, 124, 126, 128, respectively. The first corner 123p, the second corner 125p, the third corner 127p, and the fourth corner 129p are outer side surfaces of the first connection 123, the second connection 125, the third connection 127, and the fourth connection 129, respectively. The first corner 123p is located between the first outer side 122p and the second outer side 124p, and the second corner 125p is located between the second outer side 124p and the third outer side 126p. The third corner 127p is located between the third outer side surface 126p and the fourth outer side surface 128p, and the fourth corner 129p is located between the fourth outer side surface 128p and the first outer side surface 122 p.

As shown in fig. 11B, the fixing body 110 has a frame portion 111 and a side portion 112. The side portion 112 includes a first side portion 112a, a second side portion 112b, a third side portion 112c, and a fourth side portion 112d.

The first side portion 112a is located on the-Y direction side with respect to the movable body 120, and extends in the X axis direction. The second side portion 112b is located on the +x direction side with respect to the movable body 120, and extends in the Y axis direction. The third side portion 112c is located on the +y direction side with respect to the movable body 120, and extends in the X axis direction. The fourth side portion 112d is located on the-X direction side with respect to the movable body 120, and extends in the Y axis direction. The first, second, third and

fourth side portions

112a, 112b, 112c and 112d are connected in order of the first, second, third and

fourth side portions

112a, 112b, 112c and 112d along the circumferential direction S. In the following description of the present specification, a space surrounded by the first side portion 112a, the second side portion 112b, the third side portion 112c, and the fourth side portion 112d is sometimes referred to as an interior 110S of the fixed body 110.

The frame 111 is connected to the first side portion 112a, the second side portion 112b, the third side portion 112c, and the fourth side portion 112d from the +z direction side. The frame 111 has an opening 111h connecting the inside 110S of the fixed body 110 and the outside.

The fixing body 110 is provided with a concave surface 110q. The concave surface 110q is provided on the inner peripheral surface of the fixed body 110. The concave surface 110q has a shape extending in the circumferential direction S. The concave surface 110q has a shape in which a central portion in the Z-axis direction of the concave surface 110q is recessed radially outward. The concave surface 110q has a curved shape by being curved concave. In the present embodiment, the concave surface 110q is curved in a spherical shape.

Concave surfaces 110q are provided inside the connection portion between the first side portion 112a and the second side portion 112b, inside the connection portion between the second side portion 112b and the third side portion 112c, inside the connection portion between the third side portion 112c and the fourth side portion 112d, and inside the connection portion between the fourth side portion 112d and the first side portion 112a, respectively.

The plurality of concave surfaces 110q are arranged at predetermined intervals along the circumferential direction S. In the present embodiment, four concave surfaces 110q are arranged along the circumferential direction S with respect to the optical axis P, and adjacent concave surfaces 110q are arranged at intervals of 90 ° in the circumferential direction S with the optical axis P as the center.

Further, an FPC180 is mounted on the side portion 112 of the fixed body 110. A coil 156b, a coil 154b, and a coil 152b are mounted inside the FPC180. Current is supplied from FPC180 to coil 156b, coil 154b, and coil 152b. Further, a first magnetic body 172, a third magnetic body 176, and a second magnetic body 174 are mounted on the outside of the FPC180. The first magnetic body 172 faces the coil 156b through the FPC180. The second magnetic body 174 faces the coil 154b through the FPC180. The third magnetic body 176 faces the coil 152b through the FPC180.

As is understood from fig. 10 to 11B, the first swing mechanism 152, the second swing mechanism 154, and the third swing mechanism 156 are disposed at positions along the X-axis direction and the Y-axis direction with respect to the movable body 120. Further, at the four corners of the movable body 120, the convex portions 120c of the movable body 120 are in contact with the concave surfaces 110q of the fixed body 110. Therefore, it is difficult to provide a member for mechanically fixing the swing shaft of the movable body 120 to the movable body 120 on the radial outside. In the optical unit 100, when the movable body 120 is swung about the first swing axis Sa1, the second swing axis Sa2, and the third swing axis Sa3 by the group of the first magnet 162 and the first magnetic body 172, the group of the second magnet 164 and the second magnetic body 174, and the group of the third magnet 166 and the third magnetic body 176, stable swinging of the movable body 120 can be achieved.

Next, the optical unit 100 according to the present embodiment will be described with reference to fig. 10 to 12D. Fig. 12A is a schematic perspective view of the movable body 120 and the magnet 160 in the optical unit 100 according to the present embodiment, and fig. 12B is a schematic plan view of the optical unit 100 according to the present embodiment. In fig. 12B, the cover 100L is omitted. Fig. 12C is a schematic cross-sectional view of the optical unit 100 along line XIIC-XIIC of fig. 12B. Fig. 12D is a schematic cross-sectional view of the optical unit 100 along line XIID-XIID of fig. 12B.

As shown in fig. 12A, the movable body 120 has a thin substantially rectangular parallelepiped shape. The movable body 120 has an optical element 130 and a holder 140. The holder 140 has a frame shape, and the optical element 130 is disposed in the holder 140.

As shown in fig. 12B, the convex portion 120c of the movable body 120 contacts the fixed body 110 in a direction orthogonal to the optical axis P of the optical element 130.

The movable body 120 swings about the first swing axis Sa1 by the magnetic interaction between the third magnet 166 of the first swing mechanism 152 and the coil 152 b. Further, the movable body 120 swings about the second swing axis Sa2 by the magnetic interaction between the second magnet 164 of the second swing mechanism 154 and the coil 154 b. Further, the movable body 120 swings about the third swing axis Sa3 by the magnetic interaction between the first magnet 162 of the third swing mechanism 156 and the coil 156 b.

As shown in fig. 12C, the movable body 120 contacts the fixed body 110 at the convex portions 120C of the contact members 120A provided at the four corners. Therefore, the movable body 120 can be smoothly moved with respect to the fixed body 110.

As shown in fig. 12D, a space is provided between the third magnet 166 of the first swinging mechanism 152 and the coil 152 b. Although not shown here, spaces are similarly provided between the second magnet 164 of the second swinging mechanism 154 and the coil 154b and between the first magnet 162 of the third swinging mechanism 156 and the coil 156 b. Therefore, the movable body 120 can be smoothly moved with respect to the fixed body 110.

In the description above with reference to fig. 8B and 10 to 12, the magnet 160 includes the first magnet 162, the second magnet 164, the third magnet 166, and the fourth magnet 168, and the magnetic body 170 includes the first magnetic body 172, the second magnetic body 174, the third magnetic body 176, and the fourth magnetic body 178, but the magnet 160 may also include magnets, and the magnetic body 170 may also include magnetic bodies.

Next, an optical unit 100 according to the present embodiment will be described with reference to fig. 13. Fig. 13 is a schematic perspective view of the first swing mechanism 152, the second swing mechanism 154, the third swing mechanism 156, the magnet 160, and the magnetic body 170 in the optical unit 100 of the present embodiment. The optical unit 100 of fig. 13 includes a fifth magnet 169 in addition to the magnet 160, and the magnetic body 170 includes a fifth magnetic body 179, and has the same structure as the optical unit 100 described above with reference to fig. 8B, and for the purpose of avoiding redundancy, duplicate description is omitted.

The magnet 160 includes a fifth magnet 169 in addition to the first magnet 162, the second magnet 164, the third magnet 166, and the fourth magnet 168. The magnetic body 170 includes a fifth magnetic body 179 in addition to the first magnetic body 172, the second magnetic body 174, the third magnetic body 176, and the fourth magnetic body 178. The first magnetic body 172, the second magnetic body 174, the third magnetic body 176, the fourth magnetic body 178, and the fifth magnetic body 179 face the first magnet 162, the second magnet 164, the third magnet 166, the fourth magnet 168, and the fifth magnet 169, respectively.

One of the fixed body 110 and the movable body 120 further includes a fifth magnet 169, and the other of the fixed body 110 and the movable body 120 further includes a fifth magnetic body 179 facing the fifth magnet 169. Here, the movable body 120 further includes a fifth magnet 169, and the fixed body 110 further includes a fifth magnetic body 179.

The first magnet 162 is located on the-Y direction side with respect to the movable body 120. The second magnet 164 is located on the +y direction side with respect to the movable body 120. The third magnet 166 is located on the-X direction side with respect to the movable body 120. The fourth magnet 168 is located on the +x direction side with respect to the movable body 120. The fifth magnet 169 is located on the-Z direction side with respect to the movable body 120.

The first magnetic body 172 is located on the-Y direction side with respect to the movable body 120. The second magnetic body 174 is located on the +y direction side with respect to the movable body 120. The third magnetic body 176 is located on the-X direction side with respect to the movable body 120. The fourth magnetic body 178 is located on the +x direction side with respect to the movable body 120. The fifth magnetic body 179 is located on the-Z direction side with respect to the movable body 120.

The first swinging mechanism 152 swings the movable body 120 relative to the fixed body 110. Specifically, 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 swinging mechanism 152 includes a third magnet 166 and a coil 152b. The third magnet 166 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the third magnetization polarization line 166m extending in the Y-axis direction as a boundary. One end of the third magnet 166 along the Z-axis direction has one polarity, and the other end has the other polarity.

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 swinging mechanism 154 includes a second magnet 164 and a coil 154b. The second magnet 164 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the second magnetization polarization line 164m extending in the X-axis direction as a boundary. One end of the second magnet 164 in the Z-axis direction has one polarity, and the other end has the other polarity.

By controlling the direction and magnitude of the current flowing to the coil 154b, the direction and magnitude of the magnetic field generated from the coil 154b can be changed. Therefore, the second swinging mechanism 154 can swing the movable body 120 about the second swinging axis Sa2 by interaction of the magnetic field generated from the coil 154b and the second magnet 164.

The third swinging mechanism 156 swings the movable body 120 about the third swinging axis Sa3 with respect to the fixed body 110. Here, the third swinging mechanism 156 includes a first magnet 162 and a coil 156b. The first magnet 162 is magnetized such that the magnetic poles of the radially outward surface are different from each other with the first magnetization polarization line 162m extending in the Z-axis direction as a boundary. One end of the first magnet 162 along the X-axis direction has one polarity, and the other end has the other polarity.

By controlling the direction and magnitude of the current flowing to the coil 156b, the direction and magnitude of the magnetic field generated from the coil 156b can be changed. Therefore, the third swinging mechanism 156 can swing the movable body 120 about the third swinging axis Sa3 by interaction of the magnetic field generated from the coil 156b and the first magnet 162.

The fourth magnet 168 is magnetized such that the magnetic poles of the radially outward surface are different from each other with a fourth magnetization polarization line 168m extending in the Z-axis direction as a boundary. One end of the fourth magnet 168 along the Y-axis direction has one polarity, and the other end has the other polarity.

The magnetic poles of the fifth magnet 169 are magnetized so as to be different from each other with a fifth magnetization polarization line 169m extending parallel to the XY plane as a boundary. One end of the fifth magnet 169 in the Z-axis direction has one polarity, and the other end has the other polarity.

The first swing shaft Sa1 passes through the first magnet 162, the first magnetic body 172, the second magnet 164, and the second magnetic body 174, respectively. The second swing shaft Sa2 passes through the third magnet 166, the third magnetic body 176, the fourth magnet 168, and the fourth magnetic body 178, respectively. The third swing shaft Sa passes through the fifth magnet 169 and the fifth magnetic body 179, respectively.

In fig. 13, the magnetic poles of the fifth magnet 169 are magnetized so as to be different from each other with respect to a fifth magnetization polarization line 169m extending parallel to the XY plane, but the magnetic poles of the fifth magnet 169 may be magnetized so as to be different from each other with respect to a fifth magnetization polarization line extending parallel to the Y axis. However, when the fifth magnet 169 is not opposed to the coil, it is preferable that no magnetization polarization line be provided on the surface of the fifth magnet 169 opposed to the movable body 120. This can prevent excessive torque from being generated and enhance the magnetic attraction force between the fifth magnet 169 and the fifth magnetic member 179.

In the above description with reference to fig. 3 to 13, the movable body 120 is in contact with the fixed body 110 via the contact member 120A, but the present embodiment is not limited thereto. The movable body 120 may not contact the fixed body 110.

Next, the optical unit 100 according to the present embodiment will be described with reference to fig. 14A to 14C. Fig. 14A is a schematic perspective view of the movable body 120 in the optical unit 100 of the present embodiment, fig. 14B is a schematic plan view of the optical unit 100 of the present embodiment, and fig. 14C is a schematic cross-sectional view of the optical unit along the XIVC-XIVC line of fig. 14B. The optical unit 100 shown in fig. 14A to 14C has the same configuration as the optical unit 100 described above with reference to fig. 12A to 12C except that the movable body 120 does not have the contact member 120A, and for the purpose of avoiding redundancy, a repetitive description is omitted.

As shown in fig. 14A, the movable body 120 has a thin substantially rectangular parallelepiped shape. The movable body 120 has an optical element 130 and a holder 140. The holder 140 has a frame shape, and the optical element 130 is disposed in the holder 140.

As shown in fig. 14B, the movable body 120 is not in contact with the fixed body 110, and the movable body 120 has a gap 120s between the movable body and the fixed body 110. Accordingly, the driving power for driving the movable body 120 can be reduced. The movable body 120 swings with respect to the fixed body 110 by the first swing mechanism 152, the second swing mechanism 154, and the third swing mechanism 156 without contacting the fixed body 110.

As shown in fig. 14C, the movable body 120 is not in contact with the contact member 120A. Therefore, the movable body 120 can be smoothly moved with respect to the fixed body 110.

As described above, the magnetic material 170 is preferably a soft magnetic material. However, the magnetic body 170 may be a permanent magnet.

In the above description with reference to fig. 3 to 14B, the first magnet 162 is disposed separately from the first swinging mechanism 152, but the present embodiment is not limited thereto. The first magnet 162 may also be used as a part of the first swinging mechanism 152. For example, as shown in fig. 5B, the first magnet 162 has an annular structure centered on the first swing axis Sa1, and the magnetic poles are reversed along the circumference. The first magnet 162 may be opposed to a plurality of split coils arranged in a ring shape around the first swing axis Sa 1. In one example, the movable body 120 can be swung about the first swing axis Sa1 by disposing the split coil in a ring shape between two sets of magnets of annular structures facing each other and facing one of the two sets of magnets of annular structures as the first magnet 162 to the first magnetic body 172. The first magnet 162 is described here, but the second magnet 164 is also similar.

Note that, as an example of the application of the optical unit 100 of the present embodiment, the smartphone 200 is illustrated in fig. 1, but the application of the optical unit 100 is not limited thereto. The optical unit 100 is suitably used as a digital still camera or a video camera. For example, the optical unit 100 may also be used as part of a vehicle recorder. Alternatively, the optical unit 100 may be mounted on a camera for flying an object (for example, a drone).

The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various modes within a range not departing from the gist thereof. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Further, the constituent elements of the different embodiments may be appropriately combined. For easy understanding, the drawings schematically show the respective components mainly, and the thickness, length, number, interval, and the like of the illustrated components may be different from actual ones in accordance with the drawing. The materials, shapes, sizes, and the like of the respective constituent elements shown in the above-described embodiments are examples, and are not particularly limited, and various modifications can be made within a range not substantially departing from the effects of the present invention.

Symbol description

100-optical unit, 110-fixed body, 120-movable body, 130-optical element, 140-holder, 152-first swing mechanism, 154-second swing mechanism, 160-magnet, 170-magnetic body, 180-FPC.

Claims

1. An optical unit, comprising:

a movable body having an optical element;

a fixed body located around the movable body; and

a first swinging mechanism which swings the movable body relative to the fixed body about a first swinging axis,

one of the movable body and the fixed body has a first magnet and a second magnet,

the other of the movable body and the fixed body has a first magnetic body facing the first magnet and a second magnetic body facing the second magnet,

the first swing shaft passes through a first magnet arrangement region in which the first magnet is arranged, a first magnetic body arrangement region in which the first magnetic body is arranged, a second magnet arrangement region in which the second magnet is arranged, and a second magnetic body arrangement region in which the second magnetic body is arranged, respectively.

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

the first magnetic body is disposed over the entire surface of the first magnetic body disposition region, or the second magnetic body is disposed over the entire surface of the second magnetic body disposition region.

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

The first magnetic body has a first portion covering a portion of the first magnetic body arrangement region and a second portion separated from the first portion of the first magnetic body and covering another portion of the first magnetic body arrangement region,

or,

the second magnetic body has a first portion that covers a part of the second magnetic body arrangement region and a second portion that is separate from the first portion of the second magnetic body and covers another part of the second magnetic body arrangement region.

4. An optical unit according to any one of claims 1 to 3, characterized in that,

the first swing shaft passes through the first magnet, the first magnetic body, the second magnet, and the second magnetic body, respectively.

5. The optical unit of claim 4, wherein the optical unit comprises a plurality of optical units,

the first swing shaft passes through the center of each of the first magnet, the first magnetic body, the second magnet, and the second magnetic body.

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

the first magnet and the second magnet are arranged on the movable body,

the first magnetic body and the second magnetic body are arranged on the fixed body.

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

the first swing mechanism has:

a magnet included in one of the movable body and the fixed body; and

and a coil included in the other of the movable body and the fixed body.

8. The optical unit according to any one of claims 1 to 7, wherein,

the direction in which the first magnetization polarization line of the first magnet extends is offset by 90 ° from the direction in which the second magnetization polarization line of the second magnet extends.

9. The optical unit according to any one of claims 1 to 8, wherein,

and a second swinging mechanism for swinging the movable body relative to the fixed body around a second swinging axis,

the second swing axis is orthogonal with respect to the first swing axis,

one of the movable body and the fixed body further has a third magnet,

the other of the movable body and the fixed body further includes a third magnetic body facing the third magnet,

the second swing shaft passes through the third magnet and the third magnetic body, respectively.

10. The optical unit of claim 9, wherein the optical unit comprises a plurality of optical units,

One of the movable body and the fixed body further has a fourth magnet,

the other of the movable body and the fixed body further includes a fourth magnetic body facing the fourth magnet,

the second swing shaft passes through the fourth magnet and the fourth magnetic body, respectively.

11. The optical unit of claim 10, wherein the optical unit comprises a plurality of optical units,

the first swing mechanism includes: a magnet of at least one of the third magnet and the fourth magnet; and a coil facing the at least one magnet,

the second swing mechanism includes: a magnet of at least one of the first magnet and the second magnet; and a coil facing the at least one magnet.

12. An optical unit according to claim 10 or 11, characterized in that,

the extending direction of the first magnetization polarization line of the first magnet is offset by 90 degrees relative to the extending direction of the second magnetization polarization line of the second magnet,

the direction in which the third magnetization polarization line of the third magnet extends is offset by 90 ° from the direction in which the fourth magnetization polarization line of the fourth magnet extends.

13. The optical unit of claim 12, wherein the optical unit comprises a plurality of optical units,

More than one coil is respectively arranged opposite to three magnets in the first magnet, the second magnet, the third magnet and the fourth magnet,

the direction of extension of the magnetization polarization line of one of the three magnets is parallel to the optical axis of the optical element,

the direction of extension of the magnetization polarization line of two magnets of the three magnets is orthogonal to the optical axis.

14. An optical unit according to any one of claims 10 to 13, characterized in that,

one of the movable body and the fixed body further has a fifth magnet,

the other of the movable body and the fixed body further includes a fifth magnetic body facing the fifth magnet.

15. An optical unit according to any one of claims 10 to 14, characterized in that,

the movable body has an outer side surface facing the fixed body,

the outer side comprises:

a first outer side;

a second outer side surface connected to the first outer side surface;

a third outer side surface connected to the second outer side surface; and

a fourth outer side surface connected with the third outer side surface and the first outer side surface,

the first magnet is arranged on the first outer side surface,

The second magnet is arranged on the third outer side surface,

the third magnet is arranged on the second outer side surface,

the fourth magnet is disposed on the fourth outer side surface.

16. The optical unit according to any one of claims 1 to 15, characterized in that,

the first magnetic body and the second magnetic body are soft magnetic bodies.

17. The optical unit according to any one of claims 1 to 16, characterized in that,

the movable body has a gap with the fixed body.

18. The optical unit according to any one of claims 1 to 16, characterized in that,

the movable body further has a contact member contacting the fixed body,

the contact member has a convex portion protruding toward the fixed body,

the convex portion has a portion of a spherical surface,

the fixing body has a concave surface in a region contacting the convex portion.