Optical component driving device, camera device, and electronic equipment

Abstract

The present invention provides an optical component driving device, a camera device, and an electronic device that can ensure smooth guidance by a guiding mechanism even in the presence of a drop impact. The lens driving device has an orthogonal direction guiding mechanism, which uses the direction of the optical axis in the lens body as a reference direction and guides the movement of the lens body along a moving direction orthogonal to the direction of the optical axis. The orthogonal direction guiding mechanism has a first protrusion and a first receiving portion, the first protrusion has a first protrusion protruding from the main body of the second movable body plate in the direction of the optical axis, and the first receiving portion is provided on the first movable body plate and has a first groove for accommodating the first protrusion. The first protrusion has: a front end face, a first inclined side face, a second inclined side face, and a connecting face, the front end face constituting the outer surface of the front end portion of the first protrusion including the top and in contact with the first groove. The first protrusion continuously expands monotonically in all directions as it moves from its top toward the main body of the second movable body plate.

Description

Technical Field

[0001] 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 Art

[0002] Camera devices installed in electronic devices such as smartphones include an optical component drive device that drives optical components such as lenses located on the optical path from the subject to the image sensor. Furthermore, to facilitate position adjustment of the optical components, the optical component drive device includes a guide mechanism to guide their movement. For example, the lens drive device disclosed in Patent Document 1 includes a guide mechanism comprised of a prismatic protrusion and a groove that receives the protrusion.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1 International Publication No. 2021 / 120113 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] However, in recent years, the camera market has been demanding higher image quality, and this has necessitated larger lens bodies. However, as lens bodies become larger, their weight increases significantly. Conventional guide mechanisms with prismatic protrusions have the following problem: stress from a drop impact concentrates on specific locations on the protrusions, causing plastic deformation and sometimes preventing smooth guidance.

[0008] The present invention has been made in view of the above-mentioned problems, 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 in the event of a drop impact.

[0009] Means for solving problems

[0010] 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 having 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 surface, 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 surface 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.

[0011] In this embodiment, 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 perpendicular to the reference direction and the moving direction, and is inclined in a manner extending toward the main body of the first component.

[0012] 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.

[0013] Furthermore, the front end surface may be configured such that a dimension in the moving direction at both end portions in the restricting direction is larger than a dimension in the moving direction at a central portion.

[0014] In addition, the shape of the above-mentioned first inclined side surface may be an isosceles trapezoid which is narrower on the above-mentioned front end face side, and the shape of the above-mentioned 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 above-mentioned front end face side in a manner smoothly connected to the two waists.

[0015] Furthermore, the second inclined side surface may be parallel to the restriction direction and have an inclination of 30° to 45° with respect to the reference direction.

[0016] 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.

[0017] Alternatively, the protrusion may be formed of resin, and the groove may be formed of metal.

[0018] 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.

[0019] In addition, it may also be 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, 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.

[0020] In addition, it may also be 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.

[0021] Furthermore, the moving direction may be the optical axis direction of the optical component.

[0022] A camera device as another preferred embodiment of the present invention includes the above-mentioned optical component driving device.

[0023] An electronic device as another preferred embodiment of the present invention includes the above-mentioned camera device.

[0024] Effects of the Invention

[0025] An optical component driving device according to the present invention includes a guide mechanism that guides movement of the optical component in a movement direction perpendicular to a predetermined direction in the optical component, with a predetermined direction in the optical component as a reference direction. The guide mechanism includes a protrusion and a receiving portion. The protrusion comprises a projection projecting from a main body of a first component in the reference direction. The receiving portion is provided on a second component and has a groove for receiving the protrusion. The protrusion comprises a front face, an inclined side face, and a connecting face. The front face forms the outer surface of the front end portion of the protrusion, including the top portion, and contacts the groove. The inclined side face forms the outer surface of the base portion of the protrusion and is a flat surface inclined relative to the reference direction. The connecting face smoothly connects the front face, the inclined side face, and the main body of the first component. The protrusion continuously and monotonically expands in all directions from its top portion toward the main body of the first component. Therefore, plastic deformation caused by stress concentration at a specific location of the protrusion during a drop impact can be avoided, thereby ensuring smooth guidance by the guide mechanism even in the presence of a drop impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It 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 which is one embodiment of the optical component driving device of the present invention.

[0027] Figure 2 It is an exploded perspective view of the lens driving device 5 .

[0028] Figure 3 This is an exploded perspective view in which the movable body 14 of the lens driving device 5 is disassembled and viewed from obliquely above.

[0029] Figure 4 This is an exploded perspective view in which the movable body 14 of the lens driving device 5 is disassembled and viewed from obliquely below.

[0030] Figure 5 The upper left is a plan view of the moving body 14 , the upper right 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.

[0031] Figure 6 It is a perspective view of the first protrusion 40A in the orthogonal direction guide mechanism 34 of the movable body 14 .

[0032] Modes for Carrying Out the Invention

[0033] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 As shown, the camera device 8 is embedded in the back of the housing of the smartphone 9 .

[0034] The camera device 8 includes a lens 6 as an optical component, an image sensor 7 that performs photoelectric conversion on light guided from a subject through the lens 6, and a lens driving device 5, which is an optical component driving device, that drives the lens 6. Light incident from the subject passes through the lens 6 and enters the image sensor 7.

[0035] The following describes the structure of this embodiment, assuming an orthogonal coordinate system consisting of mutually orthogonal X-, Y-, and Z-axes. The Z-axis is parallel to the optical axis of lens 6, with the direction of the optical axis, i.e., the Z-axis, serving as the reference direction. The X- and Y-axes are mutually orthogonal and perpendicular to the Z-axis. Hereinafter, the X-axis, Y-axis, or Z-axis directions may be referred to as the X-direction, Y-direction, or Z-direction, respectively. Furthermore, in the Z-axis direction, the direction or side where the subject is located as viewed from lens 6 may be referred to as the +Z direction, the +Z side, the upper direction, or the upper side, while the opposite direction or side where the image sensor 7 is located may be referred to as the -Z direction, the -Z side, the lower direction, or the lower side. Similarly, in the X-axis direction, one direction or side may be referred to as the +X direction or the +X side, while the other direction or side may be referred to as the -X direction or the -X side. Furthermore, in the Y-axis direction, one direction or side may be referred to as the +Y direction or the +Y side, while the other direction or side may be referred to as the -Y direction or the -Y side.

[0036] like Figure 2 As shown, 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 has a fixed body 12 and a movable body 14 supported so as to be movable in the Z direction. Figure 1 The lens support body 16 supports the lens body 6, and the frame body 18 supports the lens support body 16 so as to be movable in the XY directions. The outer shapes of the lens support body 16 and the frame body 18 as viewed from the Z direction are substantially quadrilateral.

[0037] A lens mounting hole 20 having a circular shape when viewed from the Z direction is formed inside the lens support body 16, and a lens is mounted in the lens mounting hole 20. Figure 1 The lens body 6 is configured such that the lens body 6 can be moved in the XYZ directions together with the lens support body 16 .

[0038] The first magnet 54 fixed to the lens support 16 is exposed from the +X and +Y outer surfaces of the movable body 14 . The second magnet 58 fixed to the frame 18 is exposed from the −Y outer surface of the movable body 14 .

[0039] The fixed body 12 includes a base 64 and a housing 66 that form a housing space for accommodating the movable body 14. The base 64 includes a bottom plate portion 64a that is approximately quadrilateral when viewed from the Z direction, and a vertical portion 64b that is vertically disposed in the +Z direction at the edge of the bottom plate portion 64a. Furthermore, an insert metal is embedded in the bottom plate portion 64a. The housing 66 includes an upper plate portion 70a that is approximately quadrilateral when viewed from the Z direction and is spaced apart and opposed to the bottom plate portion 64a of the base 64 in the +Z direction, and side plates 70b that extend from the four sides of the upper plate portion 70a in the -Z direction and are 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 housing 66.

[0040] Furthermore, flexible printed circuits (FPCs) 78 are arranged on three sides of the base 64, excluding the -X side, to surround the upright portion 64b from the outside. The FPCs 78 are positioned between the outer side of the upright portion 64b and the inner side of the side plate 70b of the housing 66. Terminals 80 for electrical connection to the outside of the lens drive device 5 are formed at the -Z end of the -Y side of the FPC 78.

[0041] A first coil 82 is fixed to the inner side surface of each of the +X and +Y sides of the FPC 78. Each first coil 82 faces 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 16 in the X direction, while the combination of the first magnet 54 on the +Y side and the first coil 82 drives the lens support 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 faces the first magnet 54 and detects the position of the lens support 16 in the X direction or the Y direction.

[0042] Furthermore, a second coil 84 is fixed to the inner surface of the -Y side portion of the FPC 78. The second coil 84 faces 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 movable body 14 in the Z direction. A Hall element 85 is disposed near the center of the winding of the second coil 84. The Hall element 85 faces the second magnet 58 and detects the Z-direction position of the movable body 14.

[0043] A first magnetic member 62 having a soft magnetic property is provided on the outer surface of the -Y side of the FPC 78. The first magnetic member 62 faces 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 member 62, so that the movable body 14 is attracted in the -Y direction toward the first magnetic member 62, which serves as the fixed body 12.

[0044] 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 includes a main guide shaft 90 and a secondary guide shaft 92 that are arranged to be cylindrical and stand upright from the bottom plate portion 64a at two corners on the -Y side of the four corners of the base 64 to the +Z side, and two guide holes 94 provided 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 other methods. Due to 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 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 together with the lens support body 16 in the Z direction relative to the fixed body 12 .

[0045] Next, refer to Figures 3 to 5 , the structure of the movable body 14 will be described in detail. 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 have through holes 28, 30, and 32 formed in the center for light to pass through.

[0046] 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, which is a third member, so that the lens support 16 is movable in the X and Y directions via the orthogonal direction guide mechanism 34. The orthogonal direction guide mechanism 34 will be described in detail later.

[0047] The outer cover 26 is formed by bending a sheet metal, and mounting portions 48 extending in the -Z direction are provided at the four corners of the outer cover 26. A rectangular mounting hole 50 is formed at the end of the mounting portion 48 on the -Z side.

[0048] The lens support body 16 is formed into a thick plate-like shape from resin. First magnet fixing portions 16a are provided on the outer surfaces on the +X and +Y sides of the lens support body 16, respectively, to secure the first magnet 54 and the first yoke 56. The first magnet 54 on the +X side is magnetized in the X direction, while the first magnet 54 on the +Y side is magnetized in the Y direction. Furthermore, second protrusions 44, described below, are provided on the -Z-facing surfaces of the lens support body 16 at the four corners of the lens support body 16.

[0049] The first movable plate 22 is a metal plate-like body, formed from die-cast aluminum in this embodiment. Second receiving portions 46, described below, are formed on the +Z-side surfaces of the first movable plate 22 at its four corners, while first receiving portions 42, described below, are formed on the -Z-side surfaces of the first movable plate 22. The second receiving portions 46 and the first receiving portions 42 are located back-to-back.

[0050] The second movable plate 24 is formed from resin and includes a base plate 24a and an upright portion 24b extending from the edge of the base plate 24a in the +Z direction. One of the upright portions 24b extends entirely along the -Y side, with guide holes 94 provided at both ends of the upright portion 24b in the X direction. Furthermore, a second magnet fixing portion 24c is formed on the side surface of the -Y side of the upright portion 24b, thereby securing the second magnet 58 and the second yoke 60. The second magnet 58 is magnetized in the Y direction, with the magnetization directions being opposite on the +Z side half and the -Z side half. Furthermore, mounting protrusions 52 are formed laterally on the +X side and -X side sides of the upright portion 24b, as well as on the corner portions of the upright portion 24b formed on the +X+Y side and -X+Y side. These mounting protrusions 52 fit into the mounting holes 50, securing the cover 26 to the second movable plate 24.

[0051] 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 its +X side edge and +Y side edge, thereby fixing the second magnetic component 86 respectively. Each second magnetic component 86 is opposite to the corresponding first magnet 54 in the Z direction. Through the attractive force acting between the opposing second magnetic components 86 and the first magnet 54, the lens support body 16 and the first movable body plate 22 are attracted toward the second movable body plate 24 together, thereby maintaining the integrity of the movable body 14. The second magnetic component 86 is provided on the side where the first groove 42A described later is provided and on the side where the second groove 46A is provided. 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 provided on the surface facing the +Z side located on the +Z side.

[0052] 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, which are separated in the Z direction. The first guide mechanism 36, located on the -Z side, guides the lens support body 16 along a first movement direction (in this embodiment, the X direction) perpendicular to the optical axis direction (Z direction) together with the lens body 6, which is an optical component. The second guide mechanism 38, located on the +Z side, guides the lens support body 16 along a second movement direction (in this embodiment, the Y direction) perpendicular to the optical axis direction and the first movement direction together with the lens body 6, which is an optical component.

[0053] 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, each of which is formed on the -Z side surface of each corner portion of the first movable body plate 22 having a quadrilateral outer shape. The first groove 42A is provided at both ends of the +Y side edge of the first movable body plate 22 and has a V-shaped groove shape that is recessed in the +Z direction and extends in the X direction, which is the first moving direction. The first sliding plane 42B is a plane provided at both ends of the -Y side edge opposite to the first groove 42A and is parallel to the XY plane.

[0054] 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 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 shaped to extend along the X direction, which is 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 guide mechanism 36, the first protrusion 40A is accommodated in the first groove 42A of the V-groove extending along the X direction as the first moving direction, so that the Y direction as the second moving direction acts as a limiting direction for limiting 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 as the first moving direction.

[0055] 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, each formed on the +Z side surface of each corner portion of the first movable body plate 22 having a quadrilateral outer shape. The second groove 46A is provided at both ends of the +X side edge of the first movable body plate 22 and has a V-shaped groove shape that is recessed in the -Z direction and extends in the Y direction, which is the second moving direction. The second sliding plane 46B is provided at both ends of the -X side edge opposite the second groove 46A and is parallel to the XY plane.

[0056] The second protrusions 44 are formed as multiple protrusions projecting in the -Z direction from the -Z-side surfaces of each corner of the quadrilateral lens support 16. These protrusions include a second protrusion 44A corresponding to the second groove 46A and a second protrusion 44B corresponding to the second sliding plane 46B. The second protrusions 44A and 44B have the same shape and size. Furthermore, the first protrusions 40A and 40B also have the same shape and size, differing only in that they extend in the Y direction, which serves as the second movement direction. The second protrusions 44A are located at both ends of the +X-side edge of the lens support 16, accommodated in the second groove 46A and contacting the two surfaces of the V-groove. The second protrusions 44B are located at both ends of the -X-side edge opposite the second protrusions 44A and contacting the second sliding plane 46B. In the second guide mechanism 38, the second protrusion 44A is accommodated in the second groove 46A of the V-groove extending along the Y direction serving as the second moving direction. Therefore, the X direction serving as the first moving direction acts as a limiting direction for limiting movement, and the movement of the lens support body 16 in the X direction is limited relative to the first movable body plate 22. Moreover, the lens support body 16 can move freely relative to the first movable body plate 22 only in the Y direction serving as the second moving direction.

[0057] Due to the operations 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 .

[0058] Next, the first protrusions 40A and 40B and the second protrusions 44A and 44B will be described, taking the first protrusion 40A as an example. Figure 6 As shown, the first protrusion 40A has a base end portion 402 that bulges toward the +Z direction from the surface of the main body of the second movable body plate 24, and a front end portion 401 that further bulges toward the +Z direction from the base end portion 402. The front end portion 401 has a front end surface 420 that is composed of a part of the side surface of a cylinder having an axis in the X direction as the first moving direction, and the front end surface 420 is in line contact with the first groove 42A. The two ends of the Y direction of the front end surface 420 are inclined in a manner that expands toward the base end portion 402 (the main body of the second movable body plate 24). In addition, the front end surface 420 is formed so that the dimension in the X direction of the two ends in the Y direction is larger than the dimension in the X direction in the central portion in accordance with the inclination of the second inclined side surface 423 described later.

[0059] 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 extending continuously from both ends of the front end surface 420 in the Y direction. It has the shape of an isosceles trapezoid that is narrower on the side of the front end surface 420. Furthermore, the first inclined side surface 421 has the same inclination as the both ends of the front end surface 420 in the Y direction, and the distance between the two first inclined side surfaces 421 increases in the Y direction as the distance approaches the main body of the second movable plate 24.

[0060] 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 the shape of an arc 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 the shape of a straight line 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 the shape of a portion of a circle further extended on the upper base of the isosceles trapezoid that is narrower on the side of the front end surface 420 in a manner smoothly connected to the two waists.

[0061] The connecting surfaces 422, 424, 425, 426, and 427 are surfaces 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 to each other using curved surfaces. The connecting surface 422 connects the first inclined side surface 421 to 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, connecting the two to form a cross-sectional arc shape. The connecting surface 424 connects the second inclined side surface 423 to 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, connecting the two to form a cross-sectional arc shape.

[0062] Connecting surface 425 connects front end surface 420 and second inclined side surface 423. Specifically, the front end surface 420 side of connecting surface 425 has the same inclination as front end surface 420, and the second inclined side surface 423 side has the same inclination as second inclined side surface 423, connecting the two to form a circular arc cross-section. Connecting surface 426 connects first inclined side surface 421 and second inclined side surface 423, and also contacts connecting surface 425. Specifically, the first inclined side surface 421 side of connecting surface 426 has the same inclination as first inclined side surface 421, and the second inclined side surface 423 side has the same inclination as second inclined side surface 423, connecting the two to form a circular arc cross-section.

[0063] The connecting surface 427 is in contact with the connecting surfaces 422 and 424, and connects the connecting surface 426 to the main body of the second movable body plate 24. Specifically, the connecting surface 426 side of the connecting surface 427 is formed at the same inclination as the connecting surface 426, and the connecting surface 427 on the main body of the second movable body plate 24 is formed at the same inclination as the main body of the second movable body plate 24, connecting the two in a circular arc shape in cross section. As a result, the connecting surface 427 is also smoothly connected to the connecting surface 422 and the connecting surface 424.

[0064] 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 preferable to have as few tiny bumps and recesses as possible. In addition, it is preferable that the boundaries between the connecting surfaces 422, 424 and 427 and the second movable body plate 24 have as few steps as possible and are as parallel as possible.

[0065] 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 this 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 not less than 30° and not more than 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.

[0066] 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) as the plane of the cross-section cut in the XY direction moves from the top of the front end portion 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 monotonous does not include, for example, a situation where there is a portion parallel to the Z direction on the outer surface of a part constituting the first protrusion 40A and the portion does not expand outward as it moves 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, which are inclined at an angle of more than 30° and less than 45°, to the main body of the second movable body plate 24, which is inclined at 90° relative to the Z direction, so that stress is difficult to concentrate on this portion. The connecting surface 427 also has the same effect.

[0067] On the other hand, in conventional shapes, the surfaces corresponding to the first inclined side surface 421 and the second inclined side surface 423 are inclined at 0° relative to the Z direction. Near the base, the cross-sectional area of ​​the plane cut in the XY direction is smaller than that of the first protrusion 40A of this embodiment, resulting in a smaller allowable load. Furthermore, while the surfaces corresponding to the connecting surfaces 422 and 424 are also smoothly connected, the connection is steeper due to the surfaces being connected at 0° and 90°, resulting in a more pronounced connection and greater stress concentration compared to the connecting surfaces 422 and 424 of this embodiment. Therefore, the first protrusion 40A of this embodiment can avoid plastic deformation caused by stress concentration at a specific location when subjected to a drop impact, thereby ensuring smooth guidance by the first guide mechanism 36 even in the presence of a drop impact.

[0068] 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 has the same structure as the first protrusion 40A except for the different coordinate axes, and has the same effect. In addition, the first protrusion 40B has the same structure as the first protrusion 40A, and only differs in that the top of the front end contacts the first sliding plane 42B, and has the same effect. The same applies to the second protrusion 44B. Therefore, according to this embodiment, in the orthogonal direction guide mechanism 34, the first protrusions 40A, 40B, and 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 in the presence of a drop impact, smooth guidance by the orthogonal direction guide mechanism 34 can be ensured.

[0069] In the above configuration, when current is applied to the first coil 82, which faces the first magnet 54 on the +X side, a Lorentz force in the X direction acts on the first coil 82. Since the first coil 82 is fixed to the base 64, the reaction force acting on the first magnet 54 acts as a driving force for the lens support 16 and the first movable plate 22. As a result, the lens support 16 and the first movable plate 22 are guided by the first guide mechanism 36 and move in the X direction.

[0070] 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 low, and the first protrusion 40 slides smoothly on each other.

[0071] Furthermore, when current is supplied to the first coil 82, which faces the first magnet 54 on the -Y side, a Lorentz force in the Y direction acts on the first coil 82. Since the first coil 82 is fixed to the base 64, the reaction force acting on the first magnet 54 acts as a driving force on the lens support 16, and the lens support 16 is guided by the second guide mechanism 38 and moves in the Y direction.

[0072] 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 low, and the two slide smoothly on each other.

[0073] After the lens support 16 moves in at least one of the X direction or the Y direction, the first coil 82 is deenergized. The lens support 16 then stops at the deenergized position due to the attractive force 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 between the second receiving portion 46 and the second protrusion 44.

[0074] As described above, according to this embodiment, the lens driving device 5 includes the orthogonal direction guide mechanism 34, which guides the movement of the lens body 6 in a movement direction orthogonal to the direction of the optical axis of the lens body 6, with the direction of the optical axis as a reference direction. The orthogonal direction guide mechanism 34 includes a first protrusion 40 having a protrusion 40A protruding from the main body of the second movable body plate 24 in the direction of the optical axis, and a receiving portion 42 provided on the first movable body plate 22 and having a first groove 42A for receiving the first protrusion 40A. The first protrusion 40A has a front end face 420, a first inclined side face 421, a second inclined side face 423, and connecting faces 422, 424, 425, 426, and 427. The front end face 420 forms the outer surface of the front end portion 401 including the top of the protrusion 40A and contacts the first groove 42A. The first inclined side face 421 and the second inclined side face 423 form the outer surface of the base end portion 402 of the protrusion 40A and are flat surfaces inclined relative to the direction of the optical axis. The connecting faces 422, 424, 425, 426, and 427 smoothly connect the front end face 420, the first inclined side face 421, the second inclined side face 423, and the main body of the second movable plate 24. The protrusion 40A continuously and monotonically expands in all directions as it moves from its top toward the main body of the second movable plate 24. Therefore, according to this embodiment, stress concentration at specific positions of the first protrusion 40 and the second protrusion 44 during a drop impact and thus plastic deformation can be avoided, thereby ensuring smooth guidance by the orthogonal direction guide mechanism 34 even in the event of a drop impact.

[0075] Furthermore, in the above embodiment, the first protrusions 40A, 40B and the second protrusions 44A, 44B are formed to be of the same size and shape, but they may also be different. For example, since the first protrusions 40B and the second protrusions 44B are not constrained to be accommodated in a V-groove, they may be wider than the first protrusions 40A and the second protrusions 44A. Alternatively, since the second protrusions 44A and 44B support a smaller load, they may be smaller than the first protrusions 40A and 40B.

[0076] In the above embodiment, the first protrusion 40 is provided on the second movable body plate 24, the second protrusion 44 is provided on the lens support 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 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 16. Furthermore, 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 at least the receiving portion 42 of the second movable body plate 24 and at least the receiving portion 46 of the lens support 16 be formed of metal. In this example, the first protrusion 40 and the second protrusion 44 are provided on the first movable plate 22 on opposite sides in the optical axis direction.

[0077] Alternatively, the movement direction may be the direction of the optical axis of the lens 6, with the direction perpendicular to the optical axis being the reference direction. Alternatively, a prism may be disposed on the side of the lens 6 where the subject is located. Furthermore, the movement direction may not be solely the direction of the optical axis, or may include movement in a direction perpendicular to the optical axis.

[0078] Furthermore, although the lens body 6 is described as an optical component, for example, the image sensor 7 may be used as an optical component.

[0079] Explanation of symbols:

[0080] 5 Lens drive device; 6 Lens body; 7 Image sensor; 8 Camera device; 9 Smartphone; 12 Fixed body; 14 Moving body; 16 Lens support body; 18 Frame; 20 Lens mounting hole; 22 First moving body plate; 24 Second moving body plate; 24a Bottom plate; 24b Upright portion; 26 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 first receiving portion; 42A first groove; 42B first sliding plane; 44 second protrusion; 44A, 44B second protrusions; 46 second receiving portion; 46A second groove; 46B second sliding plane; 48 mounting portion; 50 mounting hole; 52 mounting protrusion; 54 first magnet; 56 first yoke; 58 second magnet; 60 second yoke; 62 first magnetic member; 64 base; 64a bottom plate; 65b upright portion; 66 housing; 68 bottom surface portion; 70a upper plate portion;

[0081] 70b side plate portion; 72, 74 through holes; 76 support portion; 78 FPC; 80 terminal portion;

[0082] 82 first coil; 84 second coil; 83, 85 Hall elements; 86 second magnetic component;

[0083] 88 optical axis direction support mechanism; 90 main guide shaft; 92 auxiliary guide shaft; 94 guide hole;

[0084] 401 front end portion; 402 base end portion; 420 front end surface; 421 first inclined side surface; 423 second inclined side surface; 422, 424, 425, 426, 427 connecting surfaces.

Claims

1. An optical component driving device, characterized in that: A guide mechanism is provided for guiding the movement of the optical component along a movement direction perpendicular to a predetermined direction in the optical component as a 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 surface, an inclined side surface, and a connecting surface. The front end surface constitutes the outer surface of the front end portion of the protrusion including the top and contacts the groove. The inclined side surface constitutes the outer surface of the base end portion of the protrusion and is a flat surface inclined with respect to the reference direction. The connecting surface smoothly connects the front end surface, the inclined side surface, and the main body of the first component. The protrusion continuously expands monotonically 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, wherein: 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 restriction direction perpendicular to the reference direction and the movement direction and is inclined so as to expand toward the main body of the first member.

3. The optical component driving device according to claim 2, wherein: The inclined side surface further includes 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.

4. The optical component driving device according to claim 3, wherein: 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, wherein: 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, wherein: The protrusion is formed of resin, and the groove is formed of metal.

9. The optical component driving device according to claim 1, wherein: The predetermined 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 spaced apart in the optical axis direction. The first guide mechanism guides movement of the optical component in a first movement direction, and the second guide mechanism guides movement of the optical component in a second movement direction orthogonal to the first movement direction.

10. The optical component driving device according to claim 9, wherein: 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, wherein: 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, wherein: 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 is provided.

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