CN118426241A - Optical component driving device, camera device, and electronic apparatus - Google Patents

Abstract

The invention provides an optical component driving device, a camera device and an electronic device, which can ensure smooth guiding by a guiding mechanism even if a falling impact exists. The lens driving device has an orthogonal direction guide mechanism that guides movement of the lens body in a movement direction orthogonal to the direction of the optical axis with the direction of the optical axis in the lens body as a reference direction. The orthogonal direction guide mechanism has a 1 st projection portion having a 1 st projection projecting from the body of the 2 nd moving body plate in the direction of the optical axis, and a 1 st receiving portion provided on the 1 st moving body plate and having a 1 st groove accommodating the 1 st projection. The 1 st projection has: the front end face, the 1 st inclined side face, the 2 nd inclined side face and the connecting face, and the front end face forms the outer surface of the front end part of the 1 st protrusion including the top and is contacted with the 1 st groove. The 1 st projection monotonously spreads continuously in four directions as it goes from the top thereof toward the body of the 2 nd moving body plate.

Description

Optical component driving device, camera device, and electronic apparatus

Technical Field

The present invention relates to an optical component driving device, a camera device, and an electronic device used in an electronic device such as a smart phone.

Background

A camera device mounted in an electronic device such as a smart phone is provided with an optical member driving device that drives an optical member such as a lens body located on an optical path from a subject to an image sensor. In addition, the optical member driving device is provided with a guide mechanism for guiding movement of the optical member so as to facilitate positional adjustment of the optical member. For example, in the lens driving device disclosed in patent document 1, a guide mechanism including a prismatic projection and a groove portion for accommodating the projection is provided.

Prior art literature

Patent literature

International publication No. 2021/120113 of patent document 1

Disclosure of Invention

Problems to be solved by the invention

However, in the market of camera devices in recent years, a high image quality is demanded, and a large-sized lens body is required in response to this. However, as the lens body increases in size, there is a problem in that, in a guide mechanism having a conventional prismatic projection, the weight of the lens body increases greatly: the drop impact concentrates stress on a specific position of the protrusion, and plastic deformation occurs in the protrusion, so that smooth guiding may not be possible.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an optical component driving device, a camera device, and an electronic apparatus that can ensure smooth guidance by a guide mechanism even when a drop impact is present.

Means for solving the problems

In order to solve the above-described problems, a preferred optical member driving device according to the present invention includes a guide mechanism that guides movement of an optical member in a movement direction orthogonal to a predetermined direction of the optical member, the guide mechanism including a protrusion portion having a protrusion protruding from a main body of a1 st member in the reference direction, and a receiving portion provided in a2 nd member and having a groove that accommodates the protrusion, the protrusion having a front end surface that forms an outer surface of a front end portion of the protrusion including a top portion and contacts the groove, an inclined side surface that forms an outer surface of a base end portion of the protrusion and is a plane inclined with respect to the reference direction, and a connection surface that smoothly connects the front end surface, the inclined side surface, and the main body of the 1 st member, the protrusion continuously expanding in a square manner monotonously as it goes from a top portion toward the main body of the 1 st member.

In this aspect, the distal end surface may be formed of a part of a side surface of a cylinder having an axis in the moving direction, the inclined side surface may have a1 st inclined side surface, and the 1 st inclined side surface may be provided continuously from both end portions of the distal end surface in a restricting direction orthogonal to the reference direction and the moving direction, and may be inclined so as to extend toward the body of the 1 st member.

The inclined side surface may further include a2 nd inclined side surface, and the 2 nd inclined side surface may be inclined so as to extend from a position away from both ends of the distal end surface in the moving direction toward the body of the 1 st member.

The distal end surface may be configured such that a dimension in the movement direction at both end portions in the restricting direction is larger than a dimension in the movement direction at the central portion.

The 1 st inclined side surface may have a shape of an isosceles trapezoid having a narrower front end surface side, and the 2 nd inclined side surface may have a shape in which a part of a circle is further formed on an upper base of the isosceles trapezoid having a narrower front end surface side so as to smoothly connect to the 2 waists.

The 2 nd inclined side surface may be parallel to the restricting direction, and may have a slope of 30 ° to 45 ° with respect to the reference direction.

The 1 st inclined side surface may be parallel to the moving direction, and may have a slope of 30 ° to 45 ° with respect to the reference direction.

The protrusion may be formed of a resin, and the groove may be formed of a metal.

The predetermined direction of the optical member may be an optical axis direction of the optical member, the guide mechanism may include a1 st guide mechanism and a2 nd guide mechanism spaced apart from each other in the optical axis direction, the 1 st guide mechanism may guide movement of the optical member in a1 st movement direction, and the 2 nd guide mechanism may guide movement of the optical member in a2 nd movement direction orthogonal to the 1 st movement direction.

The 1 st guide mechanism may have a1 st projection provided on the 1 st member and a1 st receiving portion provided on the 2 nd member, the 2 nd guide mechanism may have a2 nd projection provided on the 3 rd member and a2 nd receiving portion provided on the 2 nd member, and the 1 st receiving portion and the 2 nd receiving portion may be provided on opposite sides of the 2 nd member in the optical axis direction, and the optical member may be attached to the 1 st member or the 3 rd member.

The 1 st guide mechanism may have a1 st projection provided on the 1 st member and a1 st receiving portion provided on the 2 nd member, and the 2 nd guide mechanism may have a2 nd projection provided on the 1 st member and a2 nd receiving portion provided on the 3 rd member, wherein the 1 st projection and the 2 nd projection are provided on opposite sides of the 1 st member in the optical axis direction, and the optical member is attached to the 1 st member or the 3 rd member.

The moving direction may be an optical axis direction of the optical member.

A camera device according to another preferred embodiment of the present invention includes the above-described optical member driving device.

An electronic device according to another preferred embodiment of the present invention includes the camera device described above.

Effects of the invention

An optical component driving device according to the present invention includes a guide mechanism that guides movement of an optical component in a movement direction orthogonal to a reference direction with respect to the predetermined direction of the optical component, the guide mechanism including a protrusion having a protrusion protruding from a main body of a1 st component toward the reference direction, and a receiving portion provided in a2 nd component and having a groove that accommodates the protrusion, the protrusion including a front end surface that forms an outer surface of a front end portion of the protrusion including a top portion and contacts the groove, an inclined side surface that forms an outer surface of a base end portion of the protrusion and is a plane inclined with respect to the reference direction, and a connecting surface that smoothly connects the front end surface, the inclined side surface, and the main body of the 1 st component, the protrusion continuously expanding in a monotonous direction from a top portion thereof toward the main body of the 1 st component. Therefore, plastic deformation caused by concentration of stress at a specific position of the protrusion portion when a drop impact is received can be avoided, and smooth guidance by the guide mechanism can be ensured even if a drop impact is present.

Drawings

Fig. 1 is a front view of a smart phone 9, which is an electronic device having a camera device 8 mounted thereon, and the camera device 8 includes a lens driving device 5, which is one embodiment of an optical component driving device of the present invention.

Fig. 2 is an exploded perspective view of the lens driving device 5.

Fig. 3 is an exploded perspective view of the lens driving device 5, in which the movable body 14 is exploded and viewed obliquely from above.

Fig. 4 is an exploded perspective view of the lens driving device 5 when the movable body 14 is disassembled and viewed obliquely from below.

Fig. 5 is a top view of the movable body 14 in the upper left, a sectional view of the movable body 14 in the upper right, and a sectional view of the movable body 14 in the lower left, a sectional view of the movable body 14 in the B-B line.

Fig. 6 is a perspective view of the 1 st projection 40A in the orthogonal direction guide mechanism 34 of the moving body 14.

Mode for carrying out the invention

An embodiment of the present invention will be described below with reference to the drawings. As shown in fig. 1, the camera device 8 is buried in the back surface of the housing of the smart phone 9.

The camera device 8 includes a lens body 6 as an optical member, an image sensor 7 that photoelectrically converts light guided from an object via the lens body 6, and a lens driving device 5 that is an optical member driving device that drives the lens body 6. Light incident from the subject passes through the lens body 6 and enters the image sensor 7.

Hereinafter, the structure of the present embodiment will be described assuming an orthogonal coordinate system composed of mutually orthogonal X-axis, Y-axis and Z-axis. The Z axis is an axis parallel to the optical axis of the lens body 6, and the direction of the optical axis, that is, the direction of the Z axis is a reference direction. The X-axis and the Y-axis are axes orthogonal to each other and to the Z-axis. Hereinafter, the X-axis direction, the Y-axis direction, or the Z-axis direction may be referred to as the X-direction, the Y-direction, or the Z-direction, respectively. In the Z-axis direction, the direction or side in which the subject exists as viewed from the lens body 6 may be referred to as +z direction, +z side, upper direction or upper side, and the direction or side in which the image sensor 7 exists on the opposite side may be referred to as-Z direction, -Z side, lower direction or lower side. Similarly, in the X-axis direction, one direction or side is referred to as the +x direction or +x side, and the other direction or side is referred to as the-X direction or-X side. In the Y-axis direction, one direction or side may be referred to as the +y direction or +y side, and the other direction or side may be referred to as the-Y direction or-Y side.

As shown in fig. 2, the lens driving device 5 includes a fixed body 12 and a movable body 14 supported so as to be movable in the Z direction with respect to the fixed body 12. The movable body 14 includes a lens support 16 for supporting the lens body 6 of fig. 1, and a frame 18 for supporting the lens support 16 so as to be movable in the XY directions. The lens support 16 and the frame 18 have a substantially quadrangular outer shape as viewed from the Z direction.

A lens mounting hole 20 having a circular shape as viewed in the Z direction is formed inside the lens support 16, and the lens body 6 of fig. 1 is mounted in the lens mounting hole 20, whereby the lens body 6 can move in the XYZ direction together with the lens support 16.

The 1 st magnet 54 fixed to the lens support 16 is exposed from the outer surface of the +x side and the outer surface of the +y side of the movable body 14. The 2 nd magnet 58 fixed to the frame 18 is exposed from the outer surface of the-Y side of the movable body 14.

The fixed body 12 has a base 64 and a housing 66 that form an accommodation space for accommodating the movable body 14. The base 64 has a bottom plate portion 64a having a substantially quadrangular shape as viewed in the Z direction, and the bottom plate portion 64a has an upright portion 64b that is upright in the +z direction at an edge portion. Further, an insert metal is buried in the bottom plate portion 64 a. The case 66 has an upper plate portion 70a having a substantially quadrangular shape as viewed in the Z direction and being spaced apart from and opposed to the bottom plate portion 64a of the base 64 in the +z direction, and a side plate portion 70b extending from four sides of the upper plate portion 70a in the-Z direction and fixed to an edge portion of the base 64. A through hole 72 is formed in the center of the bottom plate portion 64a of the base 64, and a through hole 74 is formed in the center of the upper plate portion 70a of the housing 66.

Also, FPC (Flexible Printed Circuits) 78 are disposed on 3 sides of the base 64 other than the-X side so as to surround the standing portion 64b from the outside. The FPC78 is disposed between the outer surface of the standing portion 64b and the inner surface of the side plate portion 70b of the housing 66. A terminal portion 80 electrically connected to the outside of the lens driving device 5 is formed at an end portion on the-Z side of the-Y side portion of the FPC 78.

The 1 st coil 82 is fixed to the inner side surfaces of the +x side and the +y side of the FPC 78. Each 1 st coil 82 faces the corresponding 1 st magnet 54. Each 1 st coil 82 receives power supply from the terminal portion 80 via the FPC 78. The group of the 1 st magnet 54 and the 1 st coil 82 on the +x side drives the lens support 16 in the X direction, and the group of the 1 st magnet 54 and the 1 st coil 82 on the +y side drives the lens support 16 in the Y direction. A hall element 83 is disposed near the center of the winding of each 1 st coil 82. The hall elements 83 face the 1 st magnet 54 to detect the position of the lens support 16 in the X direction or the Y direction.

Further, the 2 nd coil 84 is fixed to the inner surface of the-Y side portion of the FPC 78. The 2 nd coil 84 is opposed to the 2 nd magnet 58. The 2 nd coil 84 receives power supply from the terminal portion 80 via the FPC 78. The group of the 2 nd magnet 58 and the 2 nd coil 84 drives the moving body 14 in the Z direction. A hall element 85 is disposed near the center of the winding of the 2 nd coil 84. The hall element 85 faces the 2 nd magnet 58 and detects the position of the movable body 14 in the Z direction.

The 1 st magnetic member 62 having soft magnetism is provided on the outer surface of the-Y side portion of the FPC 78. The 1 st magnetic member 62 faces the 2 nd magnet 58 through the FPC78 and the 2 nd coil 84. Since attractive force acts between the 2 nd magnet 58 and the 1 st magnetic member 62, the movable body 14 is attracted in the-Y direction toward the 1 st magnetic member 62 as the fixed body 12.

The movable body 14 is supported and guided to be movable in the Z direction relative to the fixed body 12 by the optical axis direction support mechanism 88. The optical axis direction supporting mechanism 88 includes a main guide shaft 90 and a sub guide shaft 92 provided in a columnar shape standing from the bottom plate portion 64a of the 2 corner portions on the-Y side of the 4 corner portions of the base 64 toward the +z side, and 2 guide holes 94 provided in the frame 18 of the moving body 14 through which the main guide shaft 90 and the sub guide shaft 92 are inserted. The main guide shaft 90 and the sub guide shaft 92 may be fixed to the insertion metal of the bottom plate portion 64a by welding or the like. The inner wall surface on the +y side of each guide hole 94 is pressed by the outer peripheral surfaces on the +y side of the corresponding main guide shaft 90 and sub guide shaft 92 by the attractive force between the 2 nd magnet 58 and the 1 st magnetic member 62. Thereby, the moving body 14 is stably guided in a stable posture. By energizing the 2 nd coil 84, the movable body 14 moves in the Z direction with respect to the fixed body 12 together with the lens support body 16.

Next, the structure of the mobile body 14 will be described in detail with reference to fig. 3 to 5. The frame 18 includes a1 st movable body plate 22 as a2 nd member, a2 nd movable body plate 24 as a1 st member, and a cover 26. The 1 st movable body plate 22, the 2 nd movable body plate 24, and the cover 26 each have an outer shape of a substantially quadrangular shape as viewed in the Z direction, and through holes 28, 30, and 32 for passing light are formed in the center.

An orthogonal direction guide mechanism 34 is interposed between the frame 18 and the lens support 16. The frame 18 supports and guides the lens support 16 as the 3 rd member in the X-direction and the Y-direction so as to be movable via the orthogonal direction guide mechanism 34. The orthogonal direction guide mechanism 34 will be described in detail later.

The cover 26 is formed by bending a plate-shaped metal, and mounting portions 48 extending in the-Z direction are provided at four corners of the cover 26. A quadrangular attachment hole 50 is formed in an end portion of the attachment portion 48 on the-Z side.

The lens support 16 is formed of resin in a thick plate shape. The 1 st magnet fixing portion 16a is provided on the +x side outer surface and the +y side outer surface of the lens support 16, respectively, and the 1 st magnet 54 and the 1 st yoke 56 are fixed. The 1 st magnet 54 on the +x side is magnetized in the X direction, and the 1 st magnet 54 on the +y side is magnetized in the Y direction. Further, at four corners of the lens support 16, a2 nd projection 44 described later is provided on a surface facing the-Z side located on the-Z side.

The 1 st movable body plate 22 is a metal plate-like body, and in the present embodiment, is formed of die-cast aluminum. The 1 st movable body plate 22 has a2 nd receiving portion 46, which will be described later, formed on a surface facing the +z side located on the +z side, and a1 st receiving portion 42, which will be described later, formed on a surface facing the-Z side located on the-Z side at four corners thereof. The 2 nd receptacle 46 is located in back-to-back relation with the 1 st receptacle 42.

The 2 nd movable body plate 24 is formed of resin, and has a bottom plate portion 24a and an upright portion 24b that is erected in the +z direction from an edge portion of the bottom plate portion 24 a. One of the upright portions 24b is integrally formed over the side on the-Y side, and guide holes 94 are provided at both ends of the upright portion 24b in the X direction. A 2 nd magnet fixing portion 24c is formed on the-Y side surface of the standing portion 24b, and the 2 nd magnet 58 and the 2 nd yoke 60 are fixed thereto. The 2 nd magnet 58 is magnetized in the Y direction, and the magnetization directions are opposite to the +z side half and the-Z side half. Further, mounting projections 52 are formed on the +x side surface and the-X side surface of the standing portion 24b and the standing portion 24b formed at the +x+y side and the-x+y side corner so as to project laterally. The mounting projections 52 are fitted into the mounting holes 50, so that the cover 26 is fixed to the 2 nd mobile body plate 24.

The 2 nd magnetic member fixing portions 24d are formed on the +x side and +y side of the surface of the 2 nd movable body plate 24 on the-Z side of the bottom plate portion 24a, and the 2 nd magnetic members 86 are fixed to the same. Each 2 nd magnetic member 86 faces the corresponding 1 st magnet 54 in the Z direction. The lens support 16 is attracted to the 2 nd movable body plate 24 together with the 1 st movable body plate 22 by attraction forces acting between the 2 nd magnetic member 86 and the 1 st magnet 54, respectively, so that the integrity of the movable body 14 can be maintained. The 2 nd magnetic member 86 is provided on the side where the 1 st slot 42A and the 2 nd slot 46A described later are provided. The 1 st projection 40 described later is provided on the surface facing the +z side on the +z side at four corners of the bottom plate portion 24a of the 2 nd movable body plate 24.

Next, the orthogonal direction guide mechanism 34 will be described in detail. The orthogonal direction guide mechanism 34 is constituted by a1 st guide mechanism 36 and a2 nd guide mechanism 38 which are spaced apart in the Z direction. The 1 st guide mechanism 36 provided on the-Z side guides the lens support 16 along the 1 st movement direction (X direction in the present embodiment) orthogonal to the optical axis direction (Z direction) together with the lens body 6 as the attached optical component. The 2 nd guide mechanism 38 provided on the +z side guides the lens support 16 along the 2 nd moving direction (Y direction in the present embodiment) orthogonal to the optical axis direction and the 1 st moving direction together with the lens body 6 as an optical member.

The 1 st guide mechanism 36 includes a1 st receiving portion 42 and a1 st projecting portion 40. The 1 st receiving portion 42 includes a1 st groove 42A and a1 st sliding plane 42B, and the 1 st groove 42A and the 1 st sliding plane 42B are formed on the-Z-side surface of each corner in the 1 st moving body plate 22 having a quadrangular outer shape. The 1 st groove 42A is provided at both ends of the side on the +y side of the 1 st movable body plate 22, and has a groove shape of a V shape recessed in the +z direction and extending in the X direction as the 1 st movement direction. The 1 st slide plane 42B is a plane parallel to the XY plane and provided at both ends of the side of the-Y side opposite to the 1 st groove 42A.

The 1 st projection 40 is formed as a plurality of projections projecting in the +z direction from the +z side surface of each corner in the 2 nd movable body plate 24 having a quadrangular outer shape, and includes a1 st projection 40A corresponding to the 1 st groove 42A and a1 st projection 40B corresponding to the 1 st sliding plane 42B. The 1 st projection 40A has the same shape and size as the 1 st projection 40B, and has a shape extending in the X direction, which is the 1 st movement direction, and a specific shape will be described later. The 1 st projection 40A is provided at both ends of the +y side of the 2 nd movable body plate 24, is accommodated in the 1 st groove 42A, and contacts 2 surfaces of the V groove. The 1 st projection 40B is provided at both ends of the side of the-Y side opposite to the 1 st projection 40A, and contacts the 1 st sliding plane 42B. Since the 1 st projection 40A is accommodated in the 1 st groove 42A of the V groove extending in the X direction which is the 1 st moving direction in the 1 st guide mechanism 36, the Y direction which is the 2 nd moving direction acts as a restricting direction for restricting movement, the 1 st moving body plate 22 restricts movement in the Y direction with respect to the 2 nd moving body plate 24, and the 1 st moving body plate 22 is movable with respect to the 2 nd moving body plate 24 only in the X direction which is the 1 st moving direction.

The 2 nd guide mechanism 38 includes a2 nd receiving portion 46 and a2 nd projecting portion 44. The 2 nd receiving portion 46 includes a2 nd groove 46A and a2 nd sliding plane 46B, and the 2 nd groove 46A and the 2 nd sliding plane 46B are formed on the +z side surface of each corner in the 1 st moving body plate 22 having a quadrangular outer shape. The 2 nd groove 46A is provided at both ends of the +x side of the 1 st movable body plate 22, and has a V-shaped groove shape recessed in the-Z direction and extending in the Y direction as the 2 nd moving direction. The 2 nd slide plane 46B is a plane parallel to the XY plane and provided at both ends of the side of the-X side opposite to the 2 nd groove 46A.

The 2 nd projection 44 is formed as a plurality of projections projecting in the-Z direction from the-Z side surface of each corner in the lens support 16 having a quadrangular outer shape, and includes a2 nd projection 44A corresponding to the 2 nd groove 46A and a2 nd projection 44B corresponding to the 2 nd sliding plane 46B. The 2 nd projection 44A has the same shape and size as the 2 nd projection 44B, and the 1 st projection 40A has the same shape and size as the 1 st projection 40B, except that the extending direction is the Y direction which is the 2 nd moving direction. The 2 nd projection 44A is provided at both ends of the +x side of the lens support 16, is accommodated in the 2 nd groove 46A, and contacts 2 surfaces of the V groove. The 2 nd projection 44B is provided at both ends of the side of the-X side opposite to the 2 nd projection 44A, and contacts the 2 nd sliding plane 46B. In the 2 nd guide mechanism 38, the 2 nd protrusion 44A is accommodated in the 2 nd groove 46A of the V groove extending in the Y direction which is the 2 nd moving direction, and therefore the X direction which is the 1 st moving direction acts as a restricting direction for restricting movement, the lens support 16 restricts movement in the X direction with respect to the 1 st moving body plate 22, and the lens support 16 is movable with respect to the 1 st moving body plate 22 only in the Y direction which is the 2 nd moving direction.

By the action of the 1 st guide mechanism 36 and the 2 nd guide mechanism 38 described above, the lens support 16 can be freely moved in the X direction and the Y direction with respect to the 2 nd movable body plate 24.

Next, the 1 st projection 40A, 40B and the 2 nd projections 44A, 44B will be described by taking the 1 st projection 40A as an example. As shown in fig. 6, the 1 st projection 40A has a base end portion 402 projecting in the +z direction from the surface of the body of the 2 nd movable body plate 24, and a tip end portion 401 projecting further in the +z direction from the base end portion 402. The tip portion 401 has a tip end surface 420 formed of a part of a side surface of a cylinder having an axis in the X direction which is the 1 st moving direction, and the tip end surface 420 is in line contact with the 1 st groove 42A. Both ends of the distal end surface 420 in the Y direction are inclined so as to extend toward the base end 402 (the main body of the 2 nd movable body plate 24). The front end surface 420 is formed to have a larger dimension in the X direction at both ends in the Y direction than in the center portion in accordance with the inclination of the 2 nd inclined side surface 423 described later.

The base end portion 402 has a1 st inclined side surface 421, a2 nd inclined side surface 423, and connection surfaces 422, 424, 425, 426, and 427. The 1 st inclined side surface 421 is a plane parallel to the X direction and continuously provided from both ends of the front end surface 420 in the Y direction, and has a shape of an isosceles trapezoid having a narrower front end surface 420 side. The 1 st inclined side surface 421 is inclined similarly to the Y-direction both end portions of the front end surface 420, and the interval between the 1 st inclined side surfaces 421 expands in the Y-direction as approaching the body of the 2 nd movable body plate 24.

The 2 nd inclined side surface 423 is a plane extending toward the body of the 2 nd movable body plate 24 from a position slightly away from both ends of the front end surface 420 in the X direction and slightly close to the body of the 2 nd movable body plate 24 in the X direction. The 2 nd inclined side surfaces 423 are planes parallel to the Y direction, and the interval between the 2 nd inclined side surfaces 423 is inclined so as to extend in the X direction as approaching the body of the 2 nd movable body plate 24. The end of the 2 nd inclined side surface 423 on the side close to the front end surface 420 is in an arc shape corresponding to the shape of the front end surface 420, and the end of the 1 st inclined side surface 421 on the side close to the 1 st inclined side surface 421 is in a straight line shape corresponding to the shape of the 1 st inclined side surface 421. In other words, the entire 2 nd inclined side surface 423 has a shape in which a part of a circle is further formed on the upper base of the isosceles trapezoid having the narrower front end surface 420 side so as to smoothly connect to the 2 waists.

The connection surfaces 422, 424, 425, 426, and 427 are surfaces that smoothly connect the front end surface 420, the 1 st inclined side surface 421, the 2 nd inclined side surface 423, and the body of the 2 nd movable body plate 24 to each other by curved surfaces. The connection surface 422 connects the 1 st inclined side surface 421 to the body of the 2 nd movable body plate 24. Specifically, the 1 st inclined side surface 421 side of the connection surface 422 forms the same inclination as the 1 st inclined side surface 421, and the 2 nd movable body plate 24 main body forms the same inclination as the 2 nd movable body plate 24 main body, and both are connected in a circular arc shape in cross section. The connection surface 424 connects the 2 nd inclined side surface 423 with the body of the 2 nd movable body plate 24. Specifically, the 2 nd inclined side surface 423 side of the connection surface 424 forms the same inclination as the 2 nd inclined side surface 423, and the body side of the 2 nd movable body plate 24 forms the same inclination as the body of the 2 nd movable body plate 24, and connects both in a circular arc shape in cross section.

The connecting surface 425 connects the front end surface 420 with the 2 nd inclined side surface 423. Specifically, the connection surface 425 has a similar inclination to the front end surface 420 and the 2 nd inclined side surface 423 on the front end surface 420 side and a similar inclination to the 2 nd inclined side surface 423, and connects both surfaces in an arc-shaped cross section. The connection surface 426 connects the 1 st inclined side surface 421 and the 2 nd inclined side surface 423, and also connects the connection surface 425. Specifically, the 1 st inclined side surface 421 side of the connecting surface 426 is inclined similarly to the 1 st inclined side surface 421, the 2 nd inclined side surface 423 side is inclined similarly to the 2 nd inclined side surface 423, and both are connected in a circular arc shape in cross section.

The connection face 427 is in contact with the connection faces 422, 424, and connects the connection face 426 to the body of the 2 nd movable body plate 24. Specifically, the connection surface 426 side of the connection surface 427 has the same inclination as the connection surface 426, and the body side of the 2 nd movable body plate 24 of the connection surface 427 has the same inclination as the body of the 2 nd movable body plate 24, and connects both in an arc shape in cross section. Thus, the connection surface 427 is smoothly connected to the connection surface 422 and the connection surface 424.

In particular, since the boundary between the distal end surface 420 and the connecting surface 425 is a boundary between the 1 st groove 42A and the contact/non-contact, it is preferable that the boundary has as little projections and depressions as possible. It is preferable that the boundaries between the connection surfaces 422, 424, and 427 and the 2 nd movable body plate 24 have as little step as possible and are as parallel as possible.

The 1 st groove 42A accommodating the 1 st projection 40A has a V-shaped cross-sectional shape in which 2 inner planes are inclined reversely with respect to the Z direction. In the present embodiment, the 1 st inclined side 421 and the 2 nd inclined side 423 of the 1 st projection 40A are inclined at an angle of 30 ° to 45 ° with respect to the Z direction, respectively. The angle of the 1 st inclined side 421 is smaller than the angle by which the inner plane of the 1 st groove 42A is inclined with respect to the Z direction. Therefore, when the 1 st projection 40A is accommodated in the 1 st groove 42A, the 1 st inclined side surface 421 (and the connection surface 422) does not contact the 1 st groove 42A, and the front end surface 420 of the 1 st projection 40A can contact the inner side surface of the 1 st groove 42A.

The 1 st projection 40A spreads monotonously from the top of the front end portion 401 toward the root portion (the main body side of the 2 nd movable body plate 24) along the plane of the cross section cut in the XY direction, and continuously increases in any direction of the X direction and the Y direction (in other words, in four directions), thereby allowing the load to increase. In this case, monotonous, for example, a case where a portion parallel to the Z direction is not present on the outer surface of a portion constituting the 1 st projection 40A, and the portion does not spread outward from the tip portion toward the root portion is not included. The connection surfaces 422 and 424 smoothly connect the 1 st inclined side surface 421 and the 2 nd inclined side surface 423 inclined at 30 ° to 45 ° and below to the main body of the 2 nd movable body plate 24 inclined at 90 ° to the Z direction, and stress is hardly concentrated in this portion. The connection face 427 also has the same function.

On the other hand, in the conventional shape, the surfaces corresponding to the 1 st inclined side surface 421 and the 2 nd inclined side surface 423 are inclined by 0 ° with respect to the Z direction, and the cross-sectional area of the plane sectioned in the XY direction is smaller in the vicinity of the root than the 1 st projection 40A of the present embodiment, so that the allowable load is also small. Further, even though the surfaces corresponding to the connection surfaces 422 and 424 are smoothly connected, the connection inclination is 0 ° and 90 ° surfaces, so that the connection is steeper, and stress is more likely to be concentrated than the connection surfaces 422 and 424 of the present embodiment. Therefore, the 1 st projection 40A of the present embodiment can avoid plastic deformation caused by stress concentration at a specific position when a drop impact is received, and thus can ensure smooth guiding by the 1 st guide mechanism 36 even when a drop impact is present.

While the 1 st projection 40A of the 1 st guide mechanism 36 has been described above, the 2 nd projection 44A of the 2 nd guide mechanism 38 has the same configuration as the 1 st projection 40A except for the difference in the coordinate axes, and the same effects are obtained. The 1 st projection 40B has the same structure as the 1 st projection 40A, and is different from the 1 st sliding plane 42B only in that the top of the tip portion is in contact with the same effect. The same applies to the 2 nd projection 44B. Therefore, according to the present embodiment, in the orthogonal direction guide mechanism 34, the 1 st projections 40A, 40B and the 2 nd projections 44A, 44B can avoid plastic deformation caused by stress concentration at specific positions when a drop impact is applied. Therefore, even if there is a drop impact, smooth guidance by the orthogonal direction guide mechanism 34 can be ensured.

In the above configuration, when current is applied to the 1 st coil 82 facing the 1 st magnet 54 on the +x side, a lorentz force in the X direction acts on the 1 st coil 82. Since the 1 st coil 82 is fixed to the base 64, the reaction acting on the 1 st magnet 54 becomes a driving force with respect to the lens support 16 and the 1 st movable body plate 22, and the lens support 16 and the 1 st movable body plate 22 are guided by the 1 st guide mechanism 36 to move in the X direction.

In the 1 st guide mechanism 36, the 1 st receiving portion 42 slides with the 1 st projecting portion 40. The 1 st receiving portion 42 is formed of metal, and the 1 st projecting portion 40 is formed of resin, so that the friction coefficient is kept small, and thus slides smoothly with each other.

When current is supplied to the 1 st coil 82 facing the 1 st magnet 54 on the-Y side, a lorentz force in the Y direction acts on the 1 st coil 82. Since the 1 st coil 82 is fixed to the base 64, the reaction acting on the 1 st magnet 54 becomes a driving force with respect to the lens support 16, and the lens support 16 is guided by the 2 nd guide mechanism 38 to move in the Y direction.

In the 2 nd guide mechanism 38, the 2 nd receiving portion 46 slides with the 2 nd projecting portion 44. The 2 nd receiving portion 46 is formed of metal, and the 2 nd protruding portion 44 is formed of resin, so that the friction coefficient is kept small, so that they slide smoothly with each other.

After the lens support 16 moves in at least one of the X direction and the Y direction, the energization to the 1 st coil 82 is stopped. Then, the lens support body 16 is stopped at the position where the energization is stopped by the attractive force between the 1 st magnets 54, 54 and the 2 nd magnetic members 86, 86 and the friction between the 1 st receiving portion 42 and the 1 st projecting portion 40 and between the 2 nd receiving portion 46 and the 2 nd projecting portion 44.

As described above, according to the present embodiment, the lens driving device 5 has the orthogonal direction guide mechanism 34, and the orthogonal direction guide mechanism 34 guides the movement of the lens body 6 in the movement direction orthogonal to the direction of the optical axis with the direction of the optical axis in the lens body 6 as the reference direction. The orthogonal direction guide mechanism 34 includes a1 st projection 40, the 1 st projection 40 having a projection 40A projecting in the direction of the optical axis from the body of the 2 nd movable body plate 24, and a receiving portion 42 provided in the 1 st movable body plate 22 and having a1 st groove 42A accommodating the 1 st projection 40A. The 1 st projection 40A has a front end surface 420, a1 st inclined side surface 421, a2 nd inclined side surface 423, and connection surfaces 422, 424, 425, 426, and 427, the front end surface 420 constituting an outer surface of the front end portion 401 including the top of the projection 40A and being in contact with the 1 st groove 42A, the 1 st inclined side surface 421, and the 2 nd inclined side surface 423 constituting an outer surface of the base end portion 402 of the projection 40A and being a plane inclined with respect to the direction of the optical axis, and the connection surfaces 422, 424, 425, 426, and 427 smoothly connecting the front end surface 420, the 1 st inclined side surface 421, the 2 nd inclined side surface 423, and the body of the 2 nd movable body plate 24. The projection 40A continuously spreads monotonously in four directions as it goes from the top thereof toward the main body of the 2 nd moving body plate 24. Therefore, according to the present embodiment, plastic deformation caused by stress concentration at specific positions of the 1 st projection 40 and the 2 nd projection 44 when a drop impact is received can be avoided, and smooth guidance by the orthogonal direction guide mechanism 34 can be ensured even if a drop impact is present.

In the above embodiment, the 1 st projections 40A, 40B and the 2 nd projections 44A, 44B are formed in the same size and the same shape, but may be different from each other. For example, since the 1 st projection 40B and the 2 nd projection 44B are not restricted to be accommodated in the V groove, the width of the 1 st projection 40A and the 2 nd projection 44A may be wider than each other. Further, for example, since the load supported by the 2 nd protrusions 44A and 44B is small, the size can be made smaller than the 1 st protrusions 40A and 40B.

In the above embodiment, the 1 st projection 40 is provided on the 2 nd movable body plate 24, the 2 nd projection 44 is provided on the lens support 16, and the 1 st receiving portion 42 and the 2 nd receiving portion 46 are provided on the 1 st movable body plate 22, but the 1 st projection 40 and the 2 nd projection 44 may be provided on the 1 st movable body plate 22, the receiving portion 42 may be provided on the 2 nd movable body plate 24, and the receiving portion 46 may be provided on the lens support 16. In this case, the 1 st component is the 1 st movable body plate 22, the 2 nd component is the 2 nd movable body plate 24, and the 3 rd component is the lens support 16. Further, at least the 1 st projection 40 and the 2 nd projection 44 of the 1 st movable body plate 22 are preferably formed of resin. In addition, at least one of the portion of the 2 nd movable body plate 24 at least receiving portion 42 and the portion of the lens support 16 at least receiving portion 46 is more preferably formed of metal. In this example, the 1 st projection 40 and the 2 nd projection 44 are provided on opposite sides of the 1 st movable body plate 22 in the optical axis direction.

The moving direction may be the optical axis direction of the lens body 6, and the direction perpendicular to the optical axis may be the reference direction. A prism may be disposed on the side of the lens body 6 where the subject is present. The movement direction may be the optical axis direction only, or a movement in a direction orthogonal to the optical axis may be added thereto.

Although the lens body 6 is described as an optical member, the image sensor 7 may be an optical member, for example.

Symbol description:

5 lens driving means; 6, a lens body; 7 an image sensor; 8 camera means; 9, a smart phone; 12a fixed body; 14 a moving body; a 16 lens support; 18a frame; 20 lens mounting holes; 221 st moving body plate; 24 nd moving body plate; 24a bottom plate portion; 24b standing parts; 26a housing; 28. 30, 32 through holes; 34 orthogonal direction guide means; 36 1 st guide mechanism; 38 nd guide mechanism; 40 1 st projection; 40A, 40B 1 st projection; 42 1 st receiving portion; 42A slot 1; 42B 1 st sliding plane; 44a 2 nd protrusion; 44A, 44B, 2 nd projection; 46 nd receiving portion; 46A groove 2; 46B slide plane 2; 48 mounting parts; 50 mounting holes; 52 mounting projections; 54 1 st magnet; 56 yoke 1; 58 nd magnet; a 60 nd yoke; 621 st magnetic component; a 64 base; 64a bottom plate portion; 65b stand portion; 66 a housing; 68 bottom surface portion; 70a upper plate portion;

70b side plate portions; 72. 74 through holes; 76 pillar portions; 78FPC;80 terminal portions;

82 1 st coil; 84 nd coil; 83. an 85 hall element; 86 nd magnetic component;

88 optical axis direction supporting means; 90 main guide shafts; 92 secondary guide shafts; 94 guide holes;

401 front end; 402 base end; 420 front end face; 421 st sloped side; 423 (th)

2 Inclined sides; 422. 424, 425, 426, 427.

Claims (14)

1. An optical component driving apparatus, characterized in that,

Comprising a guide mechanism for guiding the movement of the optical member with respect to a predetermined direction in the optical member and along a movement direction orthogonal to the predetermined direction,

The guide mechanism has a protrusion having a protrusion protruding from the main body of the 1 st member in the reference direction, and a receiving portion provided in the 2 nd member and having a groove for receiving the protrusion,

The projection has a front end surface that constitutes an outer surface of a front end portion of the projection including a top portion and is in contact with the groove, an inclined side surface that constitutes an outer surface of a base end portion of the projection and is a plane inclined with respect to the reference direction, and a connection surface that smoothly connects the front end surface, the inclined side surface, and the body of the 1 st member,

The protrusion monotonously spreads continuously in four directions as it goes from the top thereof toward the main body of the 1 st member.

2. The optical component driving apparatus according to claim 1, wherein,

The front end surface is constituted by a portion of a side surface of a cylinder having an axis in the moving direction,

The inclined side surface has a1 st inclined side surface, and the 1 st inclined side surface is continuously provided from both end portions of the front end surface in a restricting direction orthogonal to the reference direction and the moving direction, and is inclined so as to extend toward the body of the 1 st member.

3. An optical component driving apparatus according to claim 2, wherein,

The inclined side surface further has a 2 nd inclined side surface, and the 2 nd inclined side surface is inclined so as to extend from a position away from both end portions of the front end surface in the moving direction toward the body of the 1 st member.

4. An optical component driving apparatus according to claim 3, wherein,

The distal end surface is configured such that a dimension in the movement direction in both end portions of the restricting direction is larger than a dimension in the movement direction in the central portion.

5. An optical component driving apparatus according to claim 3 or 4, wherein,

The 1 st inclined side surface has a shape of an isosceles trapezoid with a narrower front end surface side, and the 2 nd inclined side surface has a shape in which a part of a circle is further formed on an upper base of the isosceles trapezoid with a narrower front end surface side in a manner of smoothly connecting with 2 waists.

6. An optical component driving apparatus according to claim 3, wherein,

The 2 nd inclined side surface is parallel to the restricting direction, and has an inclination of 30 DEG to 45 DEG inclusive with respect to the reference direction.

7. An optical component driving apparatus according to claim 2 or 6, wherein,

The 1 st inclined side surface is parallel to the moving direction, and has an inclination of 30 DEG to 45 DEG inclusive with respect to the reference direction.

8. The optical component driving apparatus according to claim 1, wherein,

The protrusion is formed of resin, and the groove is formed of metal.

9. The optical component driving apparatus according to claim 1, wherein,

The prescribed direction in the optical member is an optical axis direction of the optical member,

The guide mechanism has a1 st guide mechanism and a2 nd guide mechanism spaced apart in the optical axis direction,

The 1 st guide mechanism guides the movement of the optical member in a1 st movement direction, and the 2 nd guide mechanism guides the movement of the optical member in a2 nd movement direction orthogonal to the 1 st movement direction.

10. The optical component driving apparatus according to claim 9, wherein,

The 1 st guide mechanism has a1 st projection provided on the 1 st member and a1 st receiving portion provided on the 2 nd member,

The 2 nd guide mechanism has a2 nd protrusion provided on the 3 rd member and a2 nd receiving portion provided on the 2 nd member,

The 1 st receiving portion and the 2 nd receiving portion are provided on opposite sides of the 2 nd member in the optical axis direction,

The optical component is mounted on the 1 st component or the 3 rd component.

11. The optical component driving apparatus according to claim 9, wherein,

The 1 st guide mechanism has a1 st projection provided on the 1 st member and a1 st receiving portion provided on the 2 nd member,

The 2 nd guide mechanism has a2 nd protrusion portion provided on the 1 st member and a2 nd receiving portion provided on the 3 rd member,

The 1 st projection and the 2 nd projection are provided on opposite sides of the optical axis direction in the 1 st member,

The optical component is mounted on the 1 st component or the 3 rd component.

12. The optical component driving apparatus according to claim 1, wherein,

The moving direction is an optical axis direction of the optical member.

13. A camera apparatus, characterized in that,

An optical component driving apparatus according to claim 1.

14. An electronic device, characterized in that,

A camera device according to claim 13.