CN118426241A - Optical component driving device, camera device, and electronic device - 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 device

Technical Field

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

Background technique

An optical component driving device is provided in a camera device mounted on an electronic device such as a smartphone, and the optical component driving device drives an optical component such as a lens body located on an optical path from a subject to an image sensor. In addition, the optical component driving device is provided with a guide mechanism for guiding the movement of the optical component in order to facilitate the position adjustment of the optical component. For example, in the lens driving device disclosed in Patent Document 1, a guide mechanism is provided which is composed of a prism-shaped protrusion and a groove for receiving the protrusion.

Prior art literature

Patent Literature

Patent Document 1 International Publication No. 2021/120113

Summary of the invention

Problems to be solved by the invention

However, in the recent market of camera devices, high image quality is required, and a large lens body is required in conjunction with this. However, as the lens body becomes larger, if the weight of the lens body increases significantly, the following problem occurs in the guide mechanism having a conventional prism-shaped protrusion: stress is concentrated on a specific position of the protrusion due to a drop impact, thereby causing plastic deformation in the protrusion, and thus sometimes the guide cannot be performed smoothly.

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

Means for solving problems

In order to solve the above-mentioned problems, an optical component driving device as a preferred embodiment of the present invention is characterized in that it has a guiding mechanism, which takes a specified direction in the optical component as a reference direction and guides the movement of the optical component along a moving direction orthogonal to the above-mentioned reference direction. The above-mentioned guiding mechanism has a protrusion and a receiving portion, the protrusion has a protrusion protruding from the main body of the first component toward the above-mentioned reference direction, the receiving portion is arranged on the second component and has a groove for accommodating the above-mentioned protrusion, the above-mentioned protrusion has a front end face, an inclined side face and a connecting face, the front end face constitutes the outer surface of the front end portion of the above-mentioned protrusion including the top and contacts the above-mentioned groove, the inclined side face constitutes the outer surface of the base end portion of the above-mentioned protrusion and is a plane inclined relative to the above-mentioned reference direction, the connecting face smoothly connects the above-mentioned front end face, the above-mentioned inclined side face and the main body of the above-mentioned first component, and the above-mentioned protrusion monotonically expands continuously in all directions as it moves from its top toward the main body of the above-mentioned first component.

In this method, the front end face may be composed of a portion of a side surface of a cylinder having an axis in the moving direction, and the inclined side surface may have a first inclined side surface, which is continuously arranged from both end portions of the front end face in a limiting direction orthogonal to the reference direction and the moving direction, and is inclined in a manner extending toward the main body of the first component.

Furthermore, the inclined side surface may further include a second inclined side surface inclined so as to spread from positions away from both ends of the front end surface in the moving direction toward the main body of the first member.

Furthermore, the front end surface may be configured such that a dimension in the moving direction at both end portions of the restricting direction is larger than a dimension in the moving direction at a central portion.

In addition, the shape of the first inclined side surface may be an isosceles trapezoid which is narrower on the front end face side, and the shape of the second inclined side surface may be a shape in which a part of a circle is further extended on the upper base of the isosceles trapezoid which is narrower on the front end face side in a manner smoothly connected to the two waists.

Furthermore, the second inclined side surface may be parallel to the restricting direction and have an inclination of 30° to 45° with respect to the reference direction.

Furthermore, the first inclined side surface may be parallel to the moving direction and have an inclination of 30° to 45° with respect to the reference direction.

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

In addition, it may also be that the specified direction in the above-mentioned optical component is the optical axis direction of the above-mentioned optical component, and the above-mentioned guiding mechanism has a first guiding mechanism and a second guiding mechanism separated in the above-mentioned optical axis direction, the above-mentioned first guiding mechanism guides the movement of the above-mentioned optical component in a first moving direction, and the above-mentioned second guiding mechanism guides the movement of the above-mentioned optical component in a second moving direction orthogonal to the above-mentioned first moving direction.

In addition, it is also possible that the above-mentioned first guiding mechanism has a first protrusion provided on the above-mentioned first component, and a first receiving portion provided on the above-mentioned second component, and the above-mentioned second guiding mechanism has a second protrusion provided on the third component, and a second receiving portion provided on the above-mentioned second component, the above-mentioned first receiving portion and the above-mentioned second receiving portion are provided on opposite sides of the above-mentioned optical axis direction in the above-mentioned second component, and the above-mentioned optical component is installed on the above-mentioned first component or the above-mentioned third component.

In addition, it is also possible that the above-mentioned first guiding mechanism has a first protrusion provided on the above-mentioned first component and a first receiving portion provided on the above-mentioned second component, and the above-mentioned second guiding mechanism has a second protrusion provided on the above-mentioned first component and a second receiving portion provided on the above-mentioned third component, the above-mentioned first protrusion and the above-mentioned second protrusion are provided on opposite sides of the above-mentioned optical axis direction in the above-mentioned first component, and the above-mentioned optical component is installed on the above-mentioned first component or the above-mentioned third component.

Furthermore, the moving direction may be the optical axis direction of the optical component.

A camera device as another preferred embodiment of the present invention includes the above-mentioned optical component driving device.

An electronic device as another preferred embodiment of the present invention includes the above-mentioned camera device.

Effects of the Invention

The optical component driving device of the present invention has a guide mechanism, which guides the movement of the optical component along a moving direction orthogonal to the reference direction with a predetermined direction in the optical component as a reference direction, and has a protrusion and a receiving portion, the protrusion having a protrusion protruding from the main body of the first component toward the reference direction, the receiving portion being provided on the second component and having a groove for accommodating the protrusion, the protrusion having a front end surface, an inclined side surface, and a connecting surface, the front end surface constituting the outer surface of the front end portion including the top of the protrusion and contacting the groove, the inclined side surface constituting the outer surface of the base end portion of the protrusion and being a plane inclined relative to the reference direction, the connecting surface smoothly connecting the front end surface, the inclined side surface, and the main body of the first component, and the protrusion monotonously and continuously expands in all directions as it moves from the top toward the main body of the first component. Therefore, it is possible to avoid plastic deformation caused by stress concentration at a specific position of the protrusion when subjected to a drop impact, so that smooth guidance by the guide mechanism can be ensured even if there is a drop impact.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of a smartphone 9 which is an electronic device equipped with a camera device 8 including a lens driving device 5 as 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 showing the movable body 14 of the lens driving device 5 as disassembled and viewed from obliquely above.

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

5 is a top view of the moving body 14 , the upper left is a cross-sectional view of the moving body 14 taken along line AA, and the lower left is a cross-sectional view of the moving body 14 taken along line BB.

FIG. 6 is a perspective view of the first protrusion 40A in the orthogonal direction guide mechanism 34 of the moving body 14 .

Mode for Carrying Out the Invention

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in FIG1 , a camera device 8 is embedded in the back surface of a housing of a smartphone 9 .

The camera device 8 includes a lens body 6 as an optical component, an image sensor 7 for photoelectrically converting light guided from a subject through the lens body 6, and a lens driving device 5, which is an optical component driving device for driving 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 consisting 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 optical axis direction, that is, the direction of the Z-axis, is taken as the reference direction. The X-axis and the Y-axis are mutually orthogonal axes and are orthogonal to the Z-axis. Hereinafter, there is a case where the direction of the X-axis, the direction of the Y-axis or the direction of the Z-axis is referred to as the X-direction, the Y-direction or the Z-direction, respectively. In addition, in the direction of the Z-axis, there is a case where the direction or one side where the subject is observed from the lens body 6 is referred to as the +Z direction, the +Z side, the upper direction or the upper side, and the direction or one side where the image sensor 7 is located on the opposite side is referred to as the -Z direction, the -Z side, the lower direction or the lower side. Similarly, in the direction of the X-axis, there is a case where the direction or one side of one side is referred to as the +X direction or the +X side, and the direction or one side of the other side is referred to as the -X direction or the -X side. In addition, in the direction of the Y-axis, there is a case where the direction or one side of one side is referred to as the +Y direction or the +Y side, and the direction or one side of the other side is referred to as the -Y direction or the -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 relative to the fixed body 12. The movable body 14 includes a lens support body 16 supporting the lens body 6 of Fig. 1 and a frame body 18 supporting the lens support body 16 so as to be movable in the XY direction. The outer shapes of the lens support body 16 and the frame body 18 as viewed from the Z direction are substantially quadrilateral shapes.

A circular lens mounting hole 20 is formed inside the lens support body 16 when viewed from the Z direction. The lens body 6 of FIG. 1 is mounted in the lens mounting hole 20 , so that the lens body 6 can move in the XYZ directions together with the lens support body 16 .

The first magnet 54 fixed to the lens support 16 is exposed from the outer surface on the +X side and the outer surface on the +Y side of the movable body 14. The second magnet 58 fixed to the frame 18 is exposed from the outer surface on the −Y side of the movable body 14.

The fixed body 12 has a base 64 and a shell 66 that form a storage space for storing the movable body 14. The base 64 has a bottom plate portion 64a that is roughly quadrilateral when viewed from the Z direction, and the bottom plate portion 64a has a vertical portion 64b that is vertically arranged in the +Z direction at the edge. In addition, an insert metal is embedded in the bottom plate portion 64a. The shell 66 has an upper plate portion 70a that is roughly quadrilateral when viewed from the Z direction and is separated and opposed to the bottom plate portion 64a of the base 64 in the +Z direction, and a side plate portion 70b that extends from the four sides of the upper plate portion 70a in the -Z direction and is fixed to the edge 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 shell 66.

In addition, FPC (Flexible Printed Circuits) 78 are arranged on three sides of the base 64 except the -X side so as to surround the upright portion 64b from the outside. The FPC 78 is arranged between the outer side surface of the upright portion 64b and the inner side 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 the end of the -Z side of the -Y side portion of the FPC 78.

The first coil 82 is fixed to each inner side surface of the +X side and the +Y side of the FPC 78. Each first coil 82 is opposed to the corresponding first magnet 54. Each first coil 82 receives power from the terminal portion 80 via the FPC 78. The combination of the first magnet 54 on the +X side and the first coil 82 drives the lens support body 16 in the X direction, and the combination of the first magnet 54 on the +Y side and the first coil 82 drives the lens support body 16 in the Y direction. A Hall element 83 is arranged near the center of the winding of each first coil 82. Each Hall element 83 is opposed to the first magnet 54 to detect the position of the lens support body 16 in the X direction or the Y direction.

In addition, a second coil 84 is fixed to the inner side surface of the -Y side portion of the FPC 78. The second coil 84 is opposite to the second magnet 58. The second coil 84 receives power from the terminal portion 80 via the FPC 78. The combination of the second magnet 58 and the second coil 84 drives the moving body 14 in the Z direction. A Hall element 85 is arranged near the center of the winding of the second coil 84. The Hall element 85 is opposite to the second magnet 58 and detects the position of the moving body 14 in the Z direction.

A first magnetic component 62 having soft magnetic properties is provided on the outer side surface of the -Y side portion of the FPC 78. The first magnetic component 62 is opposed to the second magnet 58 via the FPC 78 and the second coil 84. An attractive force acts between the second magnet 58 and the first magnetic component 62, so that the moving body 14 is attracted in the -Y direction toward the first magnetic component 62 as the fixed body 12.

The movable body 14 is supported and guided by the optical axis direction support mechanism 88 so as to be freely movable in the Z direction relative to the fixed body 12. The optical axis direction support mechanism 88 has a main guide shaft 90 and a secondary guide shaft 92 which are arranged to be cylindrical and stand upright from the bottom plate portion 64a at two corners on the -Y side among the four corners of the base 64 to the +Z side, and two guide holes 94 which are arranged in the frame 18 of the movable body 14 and through which the main guide shaft 90 and the secondary guide shaft 92 are inserted. The main guide shaft 90 and the secondary guide shaft 92 can also be fixed to the inserted metal of the bottom plate portion 64a by welding or the like. By the attraction between the second magnet 58 and the first magnetic component 62, the inner wall surface on the +Y side of each guide hole 94 is pressed by the outer peripheral surface on the +Y side of the corresponding main guide shaft 90 and the secondary guide shaft 92. As a result, the movable body 14 is stably guided in a stable posture. When the second coil 84 is energized, the movable body 14 moves in the Z direction relative to the fixed body 12 together with the lens support body 16 .

Next, the structure of the movable body 14 will be described in detail with reference to Fig. 3 to Fig. 5. The frame 18 includes a first movable body plate 22 as a second component, a second movable body plate 24 as a first component, and a cover 26. The first movable body plate 22, the second movable body plate 24, and the cover 26 each have a substantially quadrilateral shape when viewed from the Z direction, and through holes 28, 30, and 32 for light to pass through are formed in the center.

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

The outer cover 26 is formed by bending a sheet metal, and mounting portions 48 extending in the -Z direction are provided at four corners of the outer cover 26. A mounting hole 50 having a quadrilateral shape is formed at an end portion of the mounting portion 48 on the -Z side.

The lens support body 16 is formed of resin into a thick plate shape. The first magnet fixing portion 16a is provided on the outer side surface of the +X side and the outer side surface of the +Y side of the lens support body 16, respectively, so that the first magnet 54 and the first yoke 56 are fixed. The first magnet 54 on the +X side is magnetized in the X direction, and the first magnet 54 on the +Y side is magnetized in the Y direction. In addition, at the four corners of the lens support body 16, the second protrusion 44 described later is provided on the surface facing the -Z side located on the -Z side.

The first movable body plate 22 is a metal plate-like body, and in this embodiment, is formed of die-cast aluminum. At the four corners of the first movable body plate 22, a second receiving portion 46 described later is formed on the surface facing the +Z side located on the +Z side, and a first receiving portion 42 described later is formed on the surface facing the -Z side located on the -Z side. The second receiving portion 46 and the first receiving portion 42 are located back to back.

The second movable body plate 24 is formed of resin and has a bottom plate portion 24a and a vertical portion 24b vertically arranged from the edge of the bottom plate portion 24a in the +Z direction. One of the vertical portions 24b is formed to extend over the entire side of the -Y side, and guide holes 94 are provided at both ends of the vertical portion 24b in the X direction. In addition, a second magnet fixing portion 24c is formed on the side surface of the vertical portion 24b on the -Y side, thereby fixing the second magnet 58 and the second yoke 60. The second magnet 58 is magnetized in the Y direction, and the magnetization directions are opposite in the +Z side half and the -Z side half. In addition, mounting protrusions 52 are formed on the side surfaces of the vertical portion 24b and the vertical portion 24b formed at the corners of the +X+Y side and the -X+Y side in a manner protruding to the side. The mounting protrusions 52 are inserted into the mounting holes 50, so that the outer cover 26 is fixed to the second movable body plate 24.

In the surface on the -Z side of the bottom plate portion 24a of the second movable body plate 24, a second magnetic component fixing portion 24d is formed on the edge on the +X side and the edge on the +Y side, thereby fixing the second magnetic component 86 respectively. Each second magnetic component 86 is opposed to the corresponding first magnet 54 in the Z direction. Through the attractive force acting between the opposing second magnetic component 86 and the first magnet 54, the lens support body 16 is attracted to the second movable body plate 24 together with the first movable body plate 22, so that the integrity of the movable body 14 can be maintained. The second magnetic component 86 is arranged on the side where the first groove 42A described later is arranged and on the side where the second groove 46A is arranged. In addition, at the four corners of the bottom plate portion 24a of the second movable body plate 24, the first protrusion 40 described later is arranged on the surface facing the +Z side located on the +Z side.

Next, the orthogonal direction guide mechanism 34 will be described in detail. The orthogonal direction guide mechanism 34 is composed of a first guide mechanism 36 and a second guide mechanism 38 separated in the Z direction. The first guide mechanism 36 provided on the -Z side guides the lens support body 16 together with the lens body 6 as an optical component to be mounted along the first moving direction (in this embodiment, the X direction) orthogonal to the optical axis direction (Z direction). The second guide mechanism 38 provided on the +Z side guides the lens support body 16 together with the lens body 6 as an optical component along the second moving direction (in this embodiment, the Y direction) orthogonal to the optical axis direction and the first moving direction.

The first guide mechanism 36 includes a first receiving portion 42 and a first protrusion 40. The first receiving portion 42 includes a first groove 42A and a first sliding plane 42B, which are formed on the -Z side surface of each corner portion of the first movable body plate 22 having a quadrilateral shape. The first groove 42A is provided at both ends of the side on the +Y side of the first movable body plate 22, and has a V-shaped groove shape that is recessed in the +Z direction and extends along the X direction as the first moving direction. The first sliding plane 42B is a plane that is provided at both ends of the side on the -Y side on the opposite side of the first groove 42A and is parallel to the XY plane.

The first protrusion 40 is formed as a plurality of protrusions protruding in the +Z direction from the surface on the +Z side of each corner portion of the second movable body plate 24 having a quadrilateral shape, and includes a first protrusion 40A corresponding to the first groove 42A, and a first protrusion 40B corresponding to the first sliding plane 42B. The first protrusion 40A and the first protrusion 40B have the same shape and size, and are in a shape extending along the X direction as the first moving direction. The specific shape will be described later. The first protrusion 40A is provided at both ends of the edge on the +Y side of the second movable body plate 24, is accommodated in the first groove 42A and contacts the two surfaces of the V groove. The first protrusion 40B is provided at both ends of the edge on the -Y side on the opposite side of the first protrusion 40A, and contacts the first sliding plane 42B. In the first guiding mechanism 36, the first protrusion 40A is accommodated in the first groove 42A of the V-groove extending along the X direction which is the first moving direction, so that the Y direction which is the second moving direction acts as a limiting direction for limiting the movement, and the first movable body plate 22 limits the movement in the Y direction relative to the second movable body plate 24, and the first movable body plate 22 can move freely relative to the second movable body plate 24 only in the X direction which is the first moving direction.

The second guide mechanism 38 includes a second receiving portion 46 and a second protrusion 44. The second receiving portion 46 includes a second groove 46A and a second sliding plane 46B, which are formed on the surface of the +Z side of each corner portion of the first movable body plate 22 having a quadrilateral shape. The second groove 46A is provided at both ends of the side of the +X side of the first movable body plate 22, and has a V-shaped groove shape that is recessed in the -Z direction and extends along the Y direction as the second moving direction. The second sliding plane 46B is a plane that is provided at both ends of the side of the -X side on the opposite side of the second groove 46A and is parallel to the XY plane.

The second protrusion 44 is formed as a plurality of protrusions protruding in the -Z direction from the -Z side surface of each corner of the lens support body 16 having a quadrilateral outer shape, and includes a second protrusion 44A corresponding to the second groove 46A and a second protrusion 44B corresponding to the second sliding plane 46B. The second protrusion 44A and the second protrusion 44B have the same shape and size, and the first protrusion 40A and the first protrusion 40B also have the same shape and size, and the only difference is that the extending direction is the Y direction as the second moving direction. The second protrusion 44A is provided at both ends of the side on the +X side of the lens support body 16, is accommodated in the second groove 46A, and contacts the two surfaces of the V groove. The second protrusion 44B is provided at both ends of the side on the -X side on the opposite side of the second protrusion 44A, and contacts the second sliding plane 46B. In the second guiding mechanism 38, the second protrusion 44A is accommodated in the second groove 46A of the V-groove extending along the Y direction which is the second moving direction, so that the X direction which is the first moving direction acts as a limiting direction for limiting the movement, and the movement of the lens support body 16 in the X direction is limited relative to the first movable body plate 22, and the lens support body 16 can move freely only in the Y direction which is the second moving direction relative to the first movable body plate 22.

Due to the operation of the first guide mechanism 36 and the second guide mechanism 38 described above, the lens support body 16 can freely move in the X direction and the Y direction relative to the second movable body plate 24 .

Next, taking the first protrusion 40A as an example, the first protrusion 40A, 40B and the second protrusions 44A, 44B are described. As shown in Figure 6, the first protrusion 40A has a base end 402 that bulges from the surface of the main body of the second movable body plate 24 to the +Z direction, and a front end 401 that further bulges from the base end 402 to the +Z direction. The front end 401 has a front end face 420 composed of a part of the side of a cylinder having an axis in the X direction as the first moving direction, and the front end face 420 is in line contact with the first groove 42A. The two ends of the Y direction of the front end face 420 are inclined in a manner that expands toward the base end 402 (the main body of the second movable body plate 24). In addition, the front end face 420 cooperates with the inclination of the second inclined side surface 423 described later, so that the dimension of the X direction in the two ends in the Y direction is greater than the dimension of the X direction in the central part.

The base end portion 402 has a first inclined side surface 421, a second inclined side surface 423, and connecting surfaces 422, 424, 425, 426, and 427. The first 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 is in the shape of an isosceles trapezoid narrower on the side of the front end surface 420. In addition, the first inclined side surface 421 has the same inclination as both ends of the front end surface 420 in the Y direction, and the interval between the two first inclined side surfaces 421 expands in the Y direction as it approaches the main body of the second movable body plate 24.

The second inclined side surface 423 is a plane extending toward the main body of the second movable body plate 24 from the two ends of the X direction slightly away from the front end surface 420 in the X direction and slightly close to the main body of the second movable body plate 24. The second inclined side surface 423 is a plane parallel to the Y direction, and the interval between the two second inclined side surfaces 423 is inclined in an expanding manner in the X direction as it approaches the main body of the second movable body plate 24. The end of the second 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 on the side close to the first inclined side surface 421 is in a straight line shape corresponding to the shape of the first inclined side surface 421. In other words, the second inclined side surface 423 as a whole is in a shape in which a part of a circle is further laid on the upper base of the isosceles trapezoid narrower on the side of the front end surface 420 in a manner smoothly connected to the two waists.

The connecting surfaces 422, 424, 425, 426 and 427 are surfaces that smoothly connect the front end surface 420, the first inclined side surface 421, the second inclined side surface 423 and the main body of the second movable body plate 24 to each other using a curved surface. The connecting surface 422 connects the first inclined side surface 421 with the main body of the second movable body plate 24. Specifically, the first inclined side surface 421 side of the connecting surface 422 forms the same inclination as the first inclined side surface 421, and the main body side of the second movable body plate 24 forms the same inclination as the main body of the second movable body plate 24, and the two are connected in a cross-sectional arc shape. The connecting surface 424 connects the second inclined side surface 423 with the main body of the second movable body plate 24. Specifically, the second inclined side surface 423 side of the connecting surface 424 forms the same inclination as the second inclined side surface 423, and the main body side of the second movable body plate 24 forms the same inclination as the main body of the second movable body plate 24, and the two are connected in a cross-sectional arc shape.

The connecting surface 425 connects the front end face 420 and the second inclined side face 423. Specifically, the front end face 420 side of the connecting surface 425 forms the same inclination as the front end face 420, and the second inclined side face 423 side forms the same inclination as the second inclined side face 423, and the two are connected to form a cross-sectional circular arc shape. The connecting surface 426 connects the first inclined side face 421 and the second inclined side face 423, and is also connected to the connecting surface 425. Specifically, the first inclined side face 421 side of the connecting surface 426 forms the same inclination as the first inclined side face 421, and the second inclined side face 423 side forms the same inclination as the second inclined side face 423, and the two are connected to form a cross-sectional circular arc shape.

The connection surface 427 is in contact with the connection surfaces 422 and 424, and connects the connection surface 426 to the main body of the second movable body plate 24. Specifically, the connection surface 426 side of the connection surface 427 forms the same inclination as the connection surface 426, and the main body side of the second movable body plate 24 of the connection surface 427 forms the same inclination as the main body of the second movable body plate 24, and the two are connected in a cross-sectional arc shape. As a result, the connection surface 427 is also smoothly connected to the connection surface 422 and the connection surface 424.

In particular, the boundary between the front end face 420 and the connecting surface 425 becomes the boundary of contact/non-contact with the first groove 42A, so it is preferred to have as few tiny bumps as possible. In addition, it is preferred that the boundary between the connecting surfaces 422, 424 and 427 and the second movable body plate 24 has as few steps as possible, and the two are as parallel as possible.

The first groove 42A that accommodates the first protrusion 40A has a V-shaped cross-sectional shape formed by two inner planes that are inclined in opposite directions relative to the Z direction. In the present embodiment, the first inclined side surface 421 and the second inclined side surface 423 of the first protrusion 40A are respectively inclined at an angle of 30° to 45° relative to the Z direction. The angle of the first inclined side surface 421 is smaller than the angle at which the inner plane of the first groove 42A is inclined relative to the Z direction. Therefore, when the first protrusion 40A is accommodated in the first groove 42A, the first inclined side surface 421 (and the connecting surface 422) do not contact the first groove 42A, while the front end surface 420 of the first protrusion 40A can contact the inner plane of the first groove 42A.

In addition, the first protrusion 40A monotonically expands and continuously increases in any direction of the X direction and the Y direction (in other words, in all four directions) along the plane of the cross section cut in the XY direction from the top of the front end 401 toward the root (the main body side of the second movable body plate 24), thereby allowing the load to increase. In this case, the so-called monotony does not include, for example, the situation where there is a part parallel to the Z direction on the outer surface of a part constituting the first protrusion 40A, and the part does not expand outward from the top toward the root. In addition, the connecting surfaces 422 and 424 smoothly connect the first inclined side surface 421 and the second inclined side surface 423 inclined at 30° to 45° to the main body of the second movable body plate 24 inclined at 90° relative to the Z direction, so that it is difficult to concentrate stress on this part. The connecting surface 427 also has the same effect.

On the other hand, in the conventional shape, the surface corresponding to the first inclined side surface 421 and the second inclined side surface 423 is inclined at 0° relative to the Z direction, and the cross-sectional area of the plane cut in the XY direction near the root is smaller than that of the first protrusion 40A of the present embodiment, so the allowable load is also smaller. In addition, although the surface corresponding to the connecting surface 422, 424 is also smoothly connected, since the connecting slope is 0° and 90°, it becomes a steeper connection method, so that stress is easily concentrated compared with the connecting surface 422, 424 of the present embodiment. Therefore, the first protrusion 40A of the present embodiment can avoid the plastic deformation caused by the concentration of stress at a specific position when it is subjected to a drop impact, so that even if there is a drop impact, it is possible to ensure smooth guidance by the first guide mechanism 36.

The first protrusion 40A of the first guide mechanism 36 has been described above, but the second protrusion 44A of the second guide mechanism 38 is the same structure as the first protrusion 40A except that the coordinate axis is different, and has the same effect. In addition, the first protrusion 40B is the same structure as the first protrusion 40A, and only the top of the front end is different from the first sliding plane 42B, and has the same effect. The second protrusion 44B is the same. Therefore, according to this embodiment, in the orthogonal direction guide mechanism 34, the first protrusions 40A, 40B, the second protrusions 44A, 44B can avoid the plastic deformation caused by the concentration of stress at a specific position when subjected to a drop impact. Therefore, even if there is a drop impact, the smooth guidance of the orthogonal direction guide mechanism 34 can be ensured.

In the above structure, when the first coil 82 facing the first magnet 54 on the +X side is energized, a Lorentz force in the X direction acts on the first coil 82. The first coil 82 is fixed to the base 64, so the reaction force acting on the first magnet 54 becomes a driving force with respect to the lens support body 16 and the first movable body plate 22, so that the lens support body 16 and the first movable body plate 22 are guided by the first guide mechanism 36 and move in the X direction.

In the first guide mechanism 36, the first receiving portion 42 slides on the first protrusion 40. Since the first receiving portion 42 is formed of metal and the first protrusion 40 is formed of resin, the friction coefficient is kept small, and the first protrusion 40 slides smoothly on each other.

Furthermore, when the first coil 82 facing the first magnet 54 on the -Y side is energized, a Lorentz force in the Y direction acts on the first coil 82. The first coil 82 is fixed to the base 64, so the reaction force acting on the first magnet 54 becomes a driving force with respect to the lens support body 16, and the lens support body 16 is guided by the second guide mechanism 38 and moves in the Y direction.

In the second guide mechanism 38, the second receiving portion 46 slides on the second protrusion 44. Since the second receiving portion 46 is formed of metal and the second protrusion 44 is formed of resin, the friction coefficient is kept small, and the two slide smoothly on each other.

After the lens support 16 moves in at least one of the X direction or the Y direction, the energization to the first coil 82 is stopped. Then, the lens support 16 stops at the position where the energization is stopped due to the attraction between the first magnets 54, 54 and the second magnetic members 86, 86, and the friction between the first receiving portion 42 and the first protrusion 40 and the second receiving portion 46 and the second protrusion 44.

As described above, according to the present embodiment, the lens driving device 5 includes the orthogonal direction guiding mechanism 34, which guides the movement of the lens body 6 along the moving direction orthogonal to the direction of the optical axis with the direction of the optical axis in the lens body 6 as a reference direction. The orthogonal direction guiding mechanism 34 includes the first protrusion 40 and the receiving portion 42, the first protrusion 40 having the protrusion 40A protruding from the main body of the second movable body plate 24 in the direction of the optical axis, and the receiving portion 42 is provided on the first movable body plate 22 and has the first groove 42A for accommodating the first protrusion 40A. The first protrusion 40A has a front end face 420, which constitutes the outer surface of the front end portion 401 including the top of the protrusion 40A and contacts the first groove 42A, a first inclined side surface 421, a second inclined side surface 423, and connecting surfaces 422, 424, 425, 426, and 427, which constitute the outer surface of the base end portion 402 of the protrusion 40A and are planes inclined relative to the direction of the optical axis, and connecting surfaces 422, 424, 425, 426, and 427 that smoothly connect the front end face 420, the first inclined side surface 421, the second inclined side surface 423, and the main body of the second movable body plate 24. The protrusion 40A continuously expands monotonically in all directions as it moves from the top toward the main body of the second movable body plate 24. Therefore, according to the present embodiment, stress concentration at specific positions of the first protrusion 40 and the second protrusion 44 can avoid plastic deformation caused by the drop impact, so smooth guidance by the orthogonal direction guide mechanism 34 can be ensured even in the drop impact.

In addition, in the above-mentioned embodiment, the first protrusions 40A, 40B, and the second protrusions 44A, 44B are formed in the same size and the same shape, but they may be different from each other. For example, the first protrusion 40B and the second protrusion 44B are not constrained to be accommodated in the V-groove, so they may be formed wider than the first protrusion 40A and the second protrusion 44A. In addition, for example, the load supported by the second protrusions 44A, 44B is small, so they may be formed smaller than the first protrusions 40A, 40B.

In the above-mentioned embodiment, the first protrusion 40 is provided on the second movable body plate 24, the second protrusion 44 is provided on the lens support body 16, and the first receiving portion 42 and the second receiving portion 46 are provided on the first movable body plate 22. However, the first protrusion 40 and the second protrusion 44 may be provided on the first movable body plate 22, the receiving portion 42 may be provided on the second movable body plate 24, and the receiving portion 46 may be provided on the lens support body 16. In this case, the first component is the first movable body plate 22, the second component is the second movable body plate 24, and the third component is the lens support body 16. Moreover, it is preferable that at least the first protrusion 40 and the second protrusion 44 of the first movable body plate 22 are formed of resin. In addition, it is further preferable that at least one of the portion of at least the receiving portion 42 of the second movable body plate 24 and the portion of at least the receiving portion 46 of the lens support body 16 is formed of metal. In this example, the first protrusion 40 and the second protrusion 44 are provided on the first movable body plate 22 at opposite sides in the optical axis direction.

In addition, the moving direction may be the optical axis direction of the lens body 6, and the direction perpendicular to the optical axis is the reference direction. In addition, a prism may be arranged on the side of the lens body 6 where the subject exists. In addition, the moving direction may be only the optical axis direction, or a movement in the direction perpendicular to the optical axis may be added thereto.

In addition, although the lens body 6 is described as an optical component, for example, the image sensor 7 may be used as an optical component.

Symbol Description:

5 lens driving device; 6 lens body; 7 image sensor; 8 camera device; 9 smart phone; 12 fixed body; 14 movable body; 16 lens support body; 18 frame; 20 lens mounting hole; 22 first movable body plate; 24 second movable body plate; 24a bottom plate portion; 24b upright portion; 26 outer cover; 28, 30, 32 through holes; 34 orthogonal direction guide mechanism; 36 first guide mechanism; 38 second guide mechanism; 40 first protrusion; 40A, 40B first protrusion 42 1st receiving portion; 42A 1st groove; 42B 1st sliding plane; 44 2nd protrusion; 44A, 44B 2nd protrusion; 46 2nd receiving portion; 46A 2nd groove; 46B 2nd sliding plane; 48 mounting portion; 50 mounting hole; 52 mounting protrusion; 54 1st magnet; 56 1st yoke; 58 2nd magnet; 60 2nd yoke; 62 1st magnetic member; 64 base; 64a bottom plate; 65b vertical portion; 66 housing; 68 bottom face portion; 70a upper plate;

70b side plate portion; 72, 74 through holes; 76 support portion; 78 FPC; 80 terminal portion;

82 first coil; 84 second coil; 83, 85 Hall elements; 86 second magnetic component;

88 optical axis direction support mechanism; 90 main guide axis; 92 auxiliary guide axis; 94 guide hole;

401 front end portion; 402 base end portion; 420 front end surface; 421 first inclined side surface; 423

2 inclined side surfaces; 422, 424, 425, 426, 427 connecting surfaces.

Claims (14)

1. An optical component driving device, characterized in that: A guide mechanism is provided, wherein the guide mechanism takes a predetermined direction in the optical component as a reference direction and guides the movement of the optical component along a movement direction orthogonal to the reference direction, The guide mechanism includes a protrusion and a receiving portion, wherein the protrusion includes a protrusion protruding from a main body of the first component toward the reference direction, and the receiving portion is provided on the second component and includes a groove for receiving the protrusion. The protrusion has a front end face, an inclined side face, and a connecting face, the front end face constituting an outer surface of a front end portion of the protrusion including a top portion and contacting the groove, the inclined side face constituting an outer surface of a base end portion of the protrusion and being a plane inclined relative to the reference direction, and the connecting face smoothly connecting the front end face, the inclined side face, and a main body of the first component. The protrusion continuously expands monotonously in all directions from the top thereof toward the main body of the first member. 2. The optical component driving device according to claim 1, characterized in that: The front end surface is formed by a portion of the side surface of a cylinder having an axis in the moving direction, The inclined side surface includes a first inclined side surface that is continuously provided from both ends of the front end surface in a limiting direction orthogonal to the reference direction and the moving direction and is inclined so as to spread toward a main body of the first member. 3. The optical component driving device according to claim 2, characterized in that: The inclined side surface further includes a second inclined side surface that is inclined so as to spread from positions away from both ends of the front end surface in the moving direction toward the main body of the first member. 4. The optical component driving device according to claim 3, characterized in that: The front end surface is configured such that the dimensions in the moving direction at both end portions in the restricting direction are larger than the dimensions in the moving direction at the center portion. 5. The optical component driving device according to claim 3 or 4, characterized in that: The first inclined side surface is in the shape of an isosceles trapezoid narrower on the front end face side, and the second inclined side surface is in the shape of a part of a circle laid on the upper base of the isosceles trapezoid narrower on the front end face side in a manner smoothly connected to the two waists. 6. The optical component driving device according to claim 3, characterized in that: The second inclined side surface is parallel to the restriction direction, and has an inclination of 30° to 45° with respect to the reference direction. 7. The optical component driving device according to claim 2 or 6, characterized in that: The first inclined side surface is parallel to the moving direction, and has an inclination of 30° to 45° with respect to the reference direction. 8. The optical component driving device according to claim 1, characterized in that: The protrusion is formed of resin, and the groove is formed of metal. 9. The optical component driving device according to claim 1, characterized in that: The prescribed direction in the optical component is the optical axis direction of the optical component, The guide mechanism includes a first guide mechanism and a second guide mechanism which are spaced apart in the optical axis direction. The first guide mechanism guides movement of the optical component in a first moving direction, and the second guide mechanism guides movement of the optical component in a second moving direction orthogonal to the first moving direction. 10. The optical component driving device according to claim 9, characterized in that: The first guide mechanism includes a first protrusion provided on the first member and a first receiving portion provided on the second member. The second guide mechanism includes a second protrusion provided on a third member and a second receiving portion provided on the second member. The first receiving portion and the second receiving portion are provided on opposite sides of the second member in the optical axis direction. The optical component is mounted on the first component or the third component. 11. The optical component driving device according to claim 9, characterized in that: The first guide mechanism includes a first protrusion provided on the first member and a first receiving portion provided on the second member. The second guide mechanism includes a second protrusion provided on the first member and a second receiving portion provided on the third member. The first protrusion and the second protrusion are provided on opposite sides of the first member in the optical axis direction. The optical component is mounted on the first component or the third component. 12. The optical component driving device according to claim 1, characterized in that: The moving direction is the optical axis direction of the optical component. 13. A camera device, characterized in that: A device comprising the optical component driving device according to claim 1. 14. An electronic device, characterized in that: A camera device according to claim 13.