CN115343822A - Optical component driving device, optical device, and electronic apparatus - Google Patents

Abstract

The invention provides an optical component driving device, an optical device and an electronic apparatus, wherein the optical component driving device is provided with a supporting mechanism capable of accurately controlling the movement of two components which move relatively. The optical component drive device (12) is provided with a fixed part (28), a movable part (26) which is provided opposite to the fixed part (28) and has an optical component support body (20) for supporting an optical component (14), and a support mechanism (40) which can support the movable part (26) to move relative to the fixed part (28), wherein one end face (50) of the support mechanism (40) is fixed on the fixed part (28), the other end face (49) is fixed on the movable part (26), and the optical component drive device comprises a viscoelastic part (48) made of a material with viscoelastic property.

Description

Optical component driving device, optical device, and electronic apparatus

Technical Field

The invention relates to an optical component driving device, an optical device, and an electronic apparatus.

Background

Conventionally, a guide mechanism moves a movable body to which an optical component such as a lens is attached, relative to a fixed body. The guide mechanism is composed of a convex guide structure provided on one side of the moving body and the fixed body and a concave guide structure provided on the other side. The convex guide structure slides inside the concave guide structure, whereby the moving body is guided to the fixed body (patent document 1).

[ Prior art documents ]

[ patent document ]

[ patent document 1 ] Japanese patent application laid-open No. JP2007-155886

Disclosure of Invention

[ problem to be solved by the invention ]

Thus, there is a problem that when the convex guide structure and the concave guide structure respectively provided on the two members which relatively move slide and relatively move with each other, friction is generated between the convex guide structure and the concave guide structure, and the position of the movable body with respect to the fixed body cannot be accurately controlled.

The invention aims to provide an optical component driving device, an optical device and an electronic apparatus having a supporting mechanism capable of accurately controlling the movement of two components which move relatively.

[ technical solution ] A

One aspect of the present invention is an optical component driving device including a fixed portion, a movable portion provided opposite to the fixed portion and having an optical component support body for supporting an optical component, and a support mechanism capable of supporting the movable portion to move relative to the fixed portion, the support mechanism having one end surface fixed to the fixed portion and the other end surface fixed to the movable portion and including a viscoelastic portion made of a material having viscoelasticity.

Further, it is preferable that the one end surface and the other end surface of the support mechanism are parallel to each other, and the movable portion is moved relative to the fixed portion in a direction parallel to the one end surface and the other end surface.

Further, it is preferable that the support mechanism is formed on one of the fixed portion and the movable portion, has a groove portion elongated in a moving direction of the movable portion, and has a convex portion formed on the other of the fixed portion and the movable portion in a direction opposite to the groove portion, the one end surface is fixed to one of a bottom surface of the groove portion and a top surface of the convex portion, and the other end surface is fixed to the other of the bottom surface of the groove portion and the top surface of the convex portion.

Also, preferably, the convex portion is inserted into the groove portion.

Further, it is preferable that a clearance between the groove portion and the convex portion in the moving direction of the movable portion is larger than a clearance between the groove portion and the convex portion in a direction orthogonal to the moving direction.

Further, it is preferable that the convex portion is in contact with the groove portion when the movable portion moves to a predetermined position in the moving direction of the movable portion.

Further, it is preferable that the viscoelastic portion is in contact with the fixed portion and the movable portion only at the one end surface and the other end surface.

Preferably, an end surface of the viscoelastic portion fixed to the top surface of the convex portion is smaller than the top surface of the convex portion.

An aspect of the present invention is an optical component driving device including a 1 st member and a 2 nd member, wherein the 2 nd member is a fixed portion, the 1 st member is a movable portion with respect to the 2 nd member and is a fixed portion with respect to the optical component support, the supporting mechanism includes a 1 st supporting mechanism capable of supporting the 1 st member to move with respect to the 2 nd member in a 1 st direction orthogonal to an optical axis direction of the optical component, and a 2 nd supporting mechanism capable of supporting the optical component support to move with respect to the 1 st member in a 2 nd direction orthogonal to the optical axis direction and the 1 st direction, the one end face of the viscoelastic portion of the 1 st supporting mechanism is fixed to the 2 nd member, the other end face thereof is fixed to the 1 st member, and the one end face of the viscoelastic portion of the 2 nd supporting mechanism is fixed to the 1 st member, and the other end face thereof is fixed to the optical component support.

Further, preferably, the shape of the one end face and the other end face is a circle or a regular polygon.

Further, it is preferable that the viscoelastic part is composed of at least one material selected from polyimide, polyethylene terephthalate, polyoxymethylene resin, polyacetal resin, ether urethane, silicone resin, butyl rubber, natural rubber, boron, special urethane, and urethane rubber.

Another aspect of the present invention is an optical apparatus having the optical member driving apparatus of the above aspect.

Another aspect of the present invention is an electronic apparatus including the optical component driving device according to the aspect or the optical device according to the aspect.

[ Effect of the invention ]

According to the present invention, the fixed part and the movable part are provided facing each other, one end surface of the support mechanism is fixed to the fixed part, and the other end surface is fixed to the movable part. Therefore, since no friction is generated when the movable part moves relative to the fixed part, it is possible to provide an optical component driving device, an optical device, and an electronic apparatus, each of which has a support mechanism capable of accurately controlling the movement of the two parts that move relative to each other.

Drawings

Fig. 1 is an exploded perspective view showing a photographic apparatus according to an embodiment of the present invention, viewed obliquely from above.

Fig. 2 is an exploded perspective view of the OIS assembly used in the camera apparatus according to the embodiment of the present invention, viewed from obliquely above.

Fig. 3 is an exploded perspective view of an OIS assembly used in a camera according to an embodiment of the present invention, as viewed obliquely from below.

Fig. 4 is an exploded perspective view showing a part of the outer peripheral portion of the camera device according to the embodiment of the present invention, as viewed from obliquely above.

Fig. 5 is an oblique view showing a flexible print substrate used in a camera device according to an embodiment of the present invention.

Fig. 6 is an X-direction cross-sectional view showing an OIS assembly used in a camera apparatus according to an embodiment of the present invention.

Fig. 7 is a cross-sectional view of the OIS assembly used in the camera apparatus according to the embodiment of the present invention in the Y direction.

Fig. 8 is a partial cross-sectional view in the X direction showing the state before and after the lens holder of fig. 6 is moved in the X direction.

Fig. 9 is a partial cross-sectional view in the Y direction showing the state before and after the lens support body of fig. 7 is moved in the Y direction.

Fig. 10 is a sectional view showing a main part of a camera according to a modification of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are illustrative of the optical component driving device, the optical device, and the electronic apparatus according to the present invention, and the present invention is not intended to be limited to the following embodiments.

As shown in fig. 1, a camera apparatus 10 as an optical apparatus includes a lens 14 as an optical member, and a lens driving apparatus 12 as an optical member driving apparatus to which the lens 14 has been mounted.

The lens driving device 12 includes an outer peripheral portion 16 and an OIS (Optical Image Stabilization: optical shake compensation) assembly 18. As shown in fig. 2 and 3, the OIS assembly 18 includes a lens support 20 as an optical component support for supporting the lens 14, and a 1 st frame 22 surrounding the lens support 20. The lens support 20 and the 1 st frame 22 have almost rectangular shapes when viewed from above. The lens support 20 is movable relative to the 1 st frame body 22 in a direction orthogonal to the optical axis of the lens 14, thereby performing shake compensation. The OIS assembly 18 is movable in the optical axis direction of the lens 14 relative to the peripheral portion 16, thereby performing autofocus.

In this specification, for convenience, the optical axis direction of the lens 14 is referred to as the Z direction, the 1 st direction orthogonal to the Z direction is referred to as the X direction, and the 2 nd direction orthogonal to the Z direction and the X direction is referred to as the Y direction. The object side of the optical axis is referred to as an upper side, and the opposite side thereof, where the image sensor is not shown, is referred to as a lower side.

A lens mounting hole 24 having a circular shape as viewed in the Z direction is formed in the lens support 20 on the inner side of the lens support 20, and the lens 14 is mounted in the lens mounting hole 24.

The 1 st frame body 22 is composed of a 1 st member 26, a 2 nd member 28, and a 1 st cover 30. The lens support 20, the 1 st member 26, and the 2 nd member 28 are made of engineering plastics such as Liquid Crystal Polymer (LCP), polyacetal, polyamide, polycarbonate, modified polyphenylene ether, and polybutylene terephthalate. Also, the 1 st cover 30 is made of, for example, metal. The lens support 20, the 1 st member 26, and the 2 nd member 28 are arranged in this order from the upper side. The 1 st member 26, the 2 nd member 28, and the 1 st cover 30 are formed with through holes 32, 34, and 36, respectively, through which light passes. The through holes 32, 34, and 36 are substantially circular.

The 2 nd member 28 is a fixed portion, and the lens support 20 and the 1 st member 26 are movable portions. Further, if the observation method is changed, the 1 st member 28 is a movable portion with respect to the 2 nd member 28 and a fixed portion with respect to the lens support 20. The 1 st support mechanism 40 can support the lens support 20 and the 1 st member 26 to move in the X direction with respect to the 2 nd member 28. The 2 nd support mechanism 42 can support the lens support body 20 to move in the Y direction with respect to the 1 st member 26. The 1 st support mechanism 40 and the 2 nd support mechanism 42 collectively serve as the support mechanism 38. The support mechanism 38 can support the lens support 20 to move in the X-direction and the Y-direction with respect to the 2 nd member 28.

The 1 st support mechanism 40 of the support mechanism 38 will be explained below. The 1 st supporting mechanism 40 is provided below the Z direction, and as shown in fig. 6 to 9, includes a 1 st convex portion 44, a 1 st groove portion 46, and a 1 st viscoelastic portion 48. The 1 st support mechanism 40 is formed near 4 corners of the 1 st and 2 nd members 26 and 28. The 1 st projection 44 protrudes downward from the lower surface of the 1 st member 26 and has a square shape extending in the X direction, and includes a top surface 53, side surfaces 55 and 57. The 1 st groove portion 46 is recessed downward from the upper surface of the 2 nd member 28 to form a square shape extending in the X direction, and includes a bottom surface 54, side surfaces 56 and 58. The 1 st viscoelastic portion 48 has a rectangular parallelepiped shape having an upper end surface 49, a lower end surface 50, and side surfaces 51 and 52 and extending in the X direction.

In the X and Y directions, the top surface 53 is formed smaller than the bottom surface 54, and the upper end surface 49 and the lower end surface 50 are formed smaller than the top surface 53. The top surface 53 and the bottom surface 54 are both parallel to the XY plane and face each other, the upper end surface 49 is fixed to the top surface 53, the lower end surface 50 is fixed to the bottom surface 54, and the 1 st viscoelastic part 48 is housed in the 1 st groove part 46. In this case, the 1 st convex portion 44 slightly protrudes downward in the Z direction, and the protruding height thereof is just enough to insert the 1 st groove portion 46 from the lower surface of the 1 st member 26. The 1 st viscoelastic portion 48 contacts the fixed portion and the movable portion only at the upper end face 49 and the lower end face 50.

The 1 st viscoelastic part 48 and the later-described 2 nd and 3 rd viscoelastic parts 64 and 142 are made of a material having both viscous and elastic properties, respectively, and preferably, a resin material having viscoelastic properties. In other words, it is preferable that the material has a property of instantly recovering its original shape due to high internal stress once the external force is removed although it is deformed by the externally applied force. The resin material is selected from polyimide, polyethylene terephthalate, polyoxymethylene resin, polyacetal resin, ether urethane, silicone resin, butyl rubber, natural rubber, boron, special polyurethane, and urethane rubber. Preferably, the resin material is selected from silicone rubber or silicone rubber.

Further, in the 1 st viscoelastic portion 48, the 2 nd viscoelastic portion 64, and the 3 rd viscoelastic portion 142, if the viscosity is large, it takes time to return to the original state, and conversely, if the elasticity is large, the vibration becomes large when the elastic member is deformed in the X direction or the Y direction or returned. Therefore, it is preferable that the resin used has elasticity capable of restoring to its original state and viscosity capable of reducing vibration when it is restored to its original state.

As shown in FIG. 9, in a cross-section parallel to the Y-Z plane, a small gap is formed in the Y direction between the side surface 55 of the 1 st projection 44, the side surface 51 of the 1 st viscoelastic portion 48, and the side surface 56 of the 1 st groove portion 46. As shown in fig. 8, in a cross section parallel to the X-Z plane, a gap is formed in the X direction between the side surface 57 of the 1 st convex portion 44, the side surface 52 of the 1 st viscoelastic portion 48, and the side surface 58 of the 1 st groove portion 46, in accordance with the amount of movement of the 1 st member 26 relative to the 2 nd member 28. The 1 st viscoelastic portion 48 of the 1 st member 26 is viscoelastically deformed in the X direction, and moves in the X direction parallel to the upper end surface 49 and the lower end surface 50 with respect to the 2 nd member 28.

The width of the 1 st projection 44 in the Y direction and the width of the 1 st viscoelastic portion 48 in the Y direction may be substantially the same, but as described above, the width of the 1 st projection 44 in the Y direction is larger than the width of the 1 st viscoelastic portion 48 in the Y direction. For example, the gap between the 1 st convex portion 44 and the 1 st groove portion 46 in the Y direction may be about several μm, and the gap between the 1 st viscoelastic portion 48 and the 1 st groove portion 46 in the Y direction may be about 0.1 mm. Further, the gap between the 1 st convex portion 44 and the 1 st groove portion 46 in the X direction may be about 0.5 mm. Thus, the side surface 56 of the 1 st convex portion 44 controls the movement of the 1 st convex portion 44 in the Y direction, and even if the 1 st viscoelastic portion 48 is deformed in the X direction, the side surface 51 of the 1 st viscoelastic portion 48 may not contact the side surface 56 of the 1 st groove portion 46. Therefore, no friction is generated when the 1 st member 26 moves. When the 1 st member 26 moves to a predetermined position, the side surface 57 of the 1 st convex portion 44 contacts the side surface 58 of the 1 st groove portion 46, and further movement in the X direction is regulated. This prevents the 1 st viscoelastic portion 48 from being excessively deformed in the X direction.

The upper end surface 49 and the lower end surface 50 of the 1 st viscoelastic part 48 are fixed to the top surface 53 and the bottom surface 5 by means of adhesion, thermal welding, integral molding, clamping using a member having an uneven surface, mechanical fastening, or the like. The same applies to the fixing method of the 2 nd viscoelastic portion 64 described later.

The fixation of the upper end surface 49 and the lower end surface 50 of the 1 st viscoelastic portion 48 and the fixation of the upper end surface 65 and the lower end surface 66 of the 2 nd viscoelastic portion 64 may be performed by integral fixation, only partial fixation, or fixation at a plurality of positions.

The 2 nd support mechanism 42 is provided upward in the Z direction and is configured by a 2 nd convex portion 60, a 2 nd groove portion 62, and a 2 nd viscoelastic portion 64, as shown in fig. 6 to 9. The 2 nd support mechanism 42 is formed in the vicinity of 4 corners of the lens support body 20 and the 1 st member 26. Since the 2 nd support mechanism 42 can be explained almost as the component of the 1 st support mechanism 40, the explanation of the 1 st support mechanism 40 is determined and the detailed explanation is omitted. In other words, the X direction and the Y direction are replaced, and the 2 nd member 28 is replaced with the lens support 20, and the 1 st member 26 remains unchanged. However, the 1 st member 26 is a fixed portion, the lens support 20 is a movable portion, and the lens support 20 moves in the Y direction with respect to the 1 st member 26. The 1 st convex part 44, the 1 st groove part 46, and the 1 st viscoelastic part 48 are read as the 2 nd convex part 60, the 2 nd groove part 62, and the 2 nd viscoelastic part 64, respectively. Top 53, side 55, 57 are further read as top 69, side 71, 73, bottom 54, side 56, 58 are read as bottom 70, side 72, 74, and side 51, 52 are read as sides 67, 68.

The remainder of the OIS assembly 18 is described below. The mounting portions 76 are provided at four corners of the 1 st cover 30 so as to extend downward in the Z direction. A rectangular mounting hole 78 is formed in the mounting portion 76. In addition, attached portions 80 are formed at four corners of the 2 nd member 28, and protrude sideward from the vertically disposed portions extending upward. The mounting hole 78 is fitted into the mounting portion 80, and the 1 st cover 30 is fixed to the 2 nd member 28.

The 1 st magnet 82 is fixed to the outer side of the lens support 20 on the X-direction 2 surface and the Y-direction 1 surface (the-Y side as viewed from the lens mounting hole 24). The 1 st magnets 82, 82 on the 2X-direction surface form an S-stage and an N-stage in the X-direction. The 1 st magnet 82 on the 1 st surface in the Y direction forms S-stage and N-stage in the Y direction.

Further, 1 st magnetic members 84, 84 made of a magnetic material are provided on both surfaces in the X direction on the lower surface of the 2 nd member 28. The 1 st magnets 82, 82 on both surfaces of the 1 st magnetic members 84, 84 in the X direction are opposed to each other in the Z direction with the 2 nd member 28 interposed therebetween, and an attractive force is generated between the 1 st magnets 82, 82. For this purpose, the lens support 20 and the 1 st member 26 sandwich the 2 nd member 28 and are attracted.

Further, a 2 nd magnet 86 is fixed to the 2 nd member 28 on the + Y side outer surface as viewed from the lens mounting hole 24. The 2 nd magnet 86 is divided into two parts in the Z direction, and is formed into S-stage and N-stage in the Y direction, respectively, and the stages thereof are formed in the opposite vertical direction.

The peripheral portion 16 will be explained below.

Returning to fig. 1, the peripheral portion 16 has a 2 nd frame 88. The 2 nd frame 88 surrounds the 1 st frame 22 of the OIS assembly 18. The 2 nd frame 88 has a box-shaped base 90 opened at the upper side and a box-shaped 2 nd cover 92 opened at the lower side. The base 90 is made of resin or resin containing metal therein. The 2 nd cover 92 is made of resin or nonmagnetic metal. The 2 nd frame 88 has a square shape as viewed from above, and is configured such that a 2 nd cover 92 is fitted to the outside of the base 90. Through holes 94 and 96 for passing light are formed in the base 90 and the 2 nd cover 92.

As shown in fig. 4 and 5, the flexible print substrate 100 is bent into a rectangular shape so as to surround the outer shape of the base 90. Further, in the lower portion thereof, the 1 st terminal portion 102 is formed on the-Y side, and the 2 nd terminal portion 104 is formed on the + Y side. The 1 st terminal unit 102 controls energization to a 1 st coil 106 shown later, and the 2 nd terminal unit 104 controls energization to a 2 nd coil 108 shown later, but the present invention is not limited thereto.

On the inner side of the flexible print substrate 100, the 1 st coil 106 is fixed in the X direction 2 plane and the Y direction 1 plane (Y side). Further, the 2 nd coil 108 is fixed to the other surface (+ Y side) in the Y direction inside the flexible print substrate 100. Further, inside the flexible printed board 100, an X-direction position detecting element 110 is disposed on the middle side of one 1 st coil 106 in the X-direction, a Y-direction position detecting element 112 is disposed on the middle side of the 1 st coil 106 in the Y-direction, and a Z-direction position detecting element 114 is disposed on the side of the 2 nd coil 108. The 1 st coils 106 and 106 provided on the X-direction 2-plane are electrically connected in series.

The 1 st coil 106, the X-direction position detecting element 110, and the Y-direction position detecting element 112 face the inside of the base 90 through the openings 98 provided on the respective side surfaces of the base 90, and face the 1 st magnet 82, respectively. The 2 nd coil 108 and the Z-direction position detecting element 114 face the inside of the base 90 through the opening 98, and face the 2 nd magnet 86.

As shown in fig. 1, a 2 nd magnetic member 116 made of a magnetic material and having a thin plate shape is provided on the outer side of the flexible print substrate 100. The 2 nd magnetic member 116 is opposed to the 2 nd magnet 86 with the flexible printed board 100 and the 2 nd coil 108 interposed therebetween. Since an attraction force is generated between the 2 nd magnet 86 and the 2 nd magnetic member 116, the OIS assembly 18 is attracted in the + Y direction toward the 2 nd magnetic member 116 of the outer peripheral portion 16.

The OIS assembly 18 is supported by the optical axis direction support mechanism 118 and is movable in the Z direction with respect to the outer peripheral portion 16. The optical axis direction supporting mechanism 118 is constituted by a 1 st supporting part 120 and a 2 nd supporting part 122 provided on the 2 nd frame 88, and a 1 st guiding part 124 and a 2 nd guiding part 126 provided on the 2 nd member 28. The 1 st support part 120 and the 1 st guide part 124 are combined, and the 2 nd support part 122 and the 2 nd guide part 126 are combined.

The 1 st support portion 120 and the 2 nd support portion 122 constitute a column extending in the Z direction. The 1 st support part 120 and the 2 nd support part 122 are located inside the + Y side surface of the base 90, spaced apart in the X direction, and have lower ends inserted and fixed to the lower fixing parts 1 and 130 provided near the corners of the bottom surface 128 of the base 90, respectively. The upper end of the 2 nd magnetic member 116 is bent in the Y direction at both ends in the X direction to form upper fixing portions 132 and 132. The upper fixing portions 132, 132 are formed with insertion holes 134, and the upper ends of the 1 st and 2 nd support portions 120, 122 are inserted and fixed into the insertion holes 134, 134. Thereby, the 1 st support part 120 and the 2 nd support part 122 are fixed to the outer peripheral part 16.

The 1 st guide portions 124 respectively form circular holes spaced apart in the Z direction, and the 1 st support portion 120 is inserted through the holes. In the XY-direction cross section, the 2 nd guide portion 126 is formed by two wall surfaces facing each other in the Y direction, and the 2 nd support portion 122 is inserted between the two wall surfaces.

In the above configuration, if current is applied to the 1 st coils 106, 106 opposed to the 1 st magnets 82, electromagnetic force in the X direction is generated in the 1 st coils 106, 106. Since the 1 st coils 106 and 106 are fixed to the base 90, the reaction force acting on the 1 st magnets 82 and 82 constitutes the driving force with respect to the lens support 20 and the 1 st member 26. The lens support 20 and the 1 st member 26 are supported by the 1 st support mechanism 40, and the 1 st viscoelastic portion 48 is viscoelastically deformed and moved in the X direction.

Then, if current is passed to the 1 st coil 106 facing the 1 st magnet 82 in the Y direction, electromagnetic force in the Y direction is generated in the 1 st coil 106. Since the 1 st coil 106 is fixed to the base 90, the attack force acting on the 1 st magnet 82 constitutes a driving force for the lens support 20. The lens support body 20 is supported by the 2 nd support mechanism 42, and the 2 nd viscoelastic portion 64 is viscoelastically deformed and moved in the Y direction.

After the lens support 20 is moved, if the energization of the 1 st coil 106 is stopped, the lens support 20 is returned to the initial position before the energization of the 1 st coil 106 by the elastic force of the 1 st viscoelastic part 48 or the 2 nd viscoelastic part 64, and is stopped.

For the camera device 10, for example, if it is impacted in the XY direction, the 1 st part 26 will move relative to the 2 nd part 28 and the lens support 20 will move relative to the 1 st part 26. In this case, the side surfaces 55 and 57 of the 1 st convex portion 44 of the 1 st member 26 contact the side surfaces 56 and 58 of the 1 st groove portion 46, and the side surfaces 72 and 74 of the 2 nd groove portion 62 of the lens support 20 contact the side surfaces 71 and 73 of the 2 nd convex portion 60 of the 1 st member 26. Therefore, the 1 st support mechanism 40 and the 2 nd support mechanism 42 suffer less damage. Further, since the 1 st viscoelastic part 48 and the 2 nd viscoelastic part 64 absorb the impact, the 1 st support mechanism 40 and the 2 nd support mechanism 42 are less damaged. Even if an impact is applied in the Z direction, the 1 st viscoelastic portion 48 and the 2 nd viscoelastic portion 64 block the impact, and the lens support 20, the 1 st member 26, and the 2 nd member 28 do not contact with each other, and therefore damage does not occur.

In the 1 st support mechanism 40, the 1 st projection 44 and the 1 st groove 46 have a small gap in the Y direction, and therefore the 1 st member 26 is hardly movable in the Y direction with respect to the 2 nd member 28. Similarly, in the 2 nd support mechanism 42, since the gap in the X direction between the 2 nd convex portion 60 and the 2 nd groove portion 62 is small, the lens support body 20 is hardly movable in the X direction with respect to the 1 st member 26. Thus, even if the 1 st support mechanism 40 and the 2 nd support mechanism 42 are simultaneously forced to be driven in the XY directions, the lens support body 20 is hardly rotated.

If the 2 nd coil 108 disposed between the 2 nd magnet 86 and the 2 nd magnetic member 116 is energized, electromagnetic force in the Z direction is generated in the 2 nd coil 108. Since the 2 nd coil 108 is fixed to the base 90, the reaction force acting on the 2 nd magnet 86 constitutes a driving force with respect to the OIS assembly 18, and the OIS assembly 18 is moved in the Z direction while being supported by the optical axis direction support mechanism 118.

After the OIS assembly 18 is moved in the Z direction, if the energization of the 2 nd coil 108 is stopped, the OIS assembly 18 stops at the position where the energization is stopped due to the friction between the 1 st support 120 and the 1 st guide 124 and the friction between the 2 nd support 122 and the 2 nd guide 126.

[ modification ]

Next, referring to fig. 10, the main part of the OIS assembly 18A of the lens drive device according to the modified example of the present invention will be described. The OIS assembly 18A includes a lens support 20A as a movable portion for supporting the lens 14, and a frame 22A as a fixed portion for surrounding the periphery of the lens support 20A. The lens support 20A is supported by the support mechanism 136 and is movable in any direction orthogonal to the optical axis direction of the lens 14 with respect to the frame 22A. The support mechanism 136 includes a 1 st concave portion 144 formed on the upper surface 138 of the frame 22A, a 2 nd concave portion 146 formed on the lower surface 140 of the lens support body 20A, and a 3 rd viscoelastic portion 142.

The upper surface 138 and the lower surface 140 face each other with a predetermined distance therebetween. The bottom surface of the 1 st recess 144 and the bottom surface of the 2 nd recess 146 are both formed in a direction orthogonal to the optical axis direction. The 3 rd viscoelastic part 142 has an upper end surface 148 and a lower end surface 150. Lower end surface 150 is fixed to the bottom surface of 1 st recess 144, upper end surface 148 is fixed to the bottom surface of 2 nd recess 146, and upper end surface 148 and lower end surface 150 are parallel.

The upper end surface 148 and the lower end surface 150 are circular or regular polygonal, and particularly preferably regular polygonal having a square shape or more. Further, a large gap is formed between the side surfaces of the 3 rd viscoelastic portion 142 in all directions orthogonal to the Z direction and the side surfaces of the 1 st concave portion 144 and the 2 nd concave portion 146 in all directions orthogonal to the Z direction, and even if the 3 rd viscoelastic portion 142 is deformed, the contact is not made. Thereby, the lens support 20A can move in any direction orthogonal to the Z direction with respect to the frame 22A.

In the modification, the case where the lower end surface 150 of the 3 rd viscoelastic portion 142 is fixed to the bottom surface of the 1 st recess 144 and the upper end surface 148 is fixed to the bottom surface of the 2 nd recess 146 is described, but the modification is not limited thereto. For example, instead of providing at least one of the 1 st recessed portion 144 or the 2 nd recessed portion 146, the 3 rd viscoelastic portion 142 may be directly fixed to at least one of the upper surface 138 or the lower surface 140. Further, as in the above-described embodiment, one of the 1 st concave portion 144 and the 2 nd concave portion 146 may be a convex portion. In any event, the upper end surface 148 and the lower end surface 150 are made parallel.

In the above-described embodiment and the modifications thereof, the case where the support mechanism is applied to the shake compensation mechanism that moves the lens support in the direction orthogonal to the optical axis direction has been described. However, the present invention is not limited to the above embodiment, and may be applied to an autofocus support mechanism that relatively moves a movable portion including a lens support in the optical axis direction of the lens 14.

In this case, for example, the support mechanism is disposed instead of the optical axis direction support mechanism 118. Grooves extending in the Z direction are formed in one of the OIS assembly 18, which is the movable portion, and the outer peripheral portion 16, which is the fixed portion, so as to face each other, and a protrusion is formed in the other of the OIS assembly 18 and the outer peripheral portion 16. One end surface of the viscoelastic portion is fixed to the outer peripheral portion 16, and the other end surface is fixed to the OIS assembly 18. The movable portion may be a lens support instead of the OIS assembly 18.

[ description of symbols ]

10. Photographic device

12. Lens driving device

14. Lens and lens assembly

16. Peripheral portion

18. 18A OIS assembly

20. 20A lens support

22. 22A 1 st frame body

24. Hole for lens mounting

26. Item 1

28. 2 nd part

30. No. 1 cover

32. 34, 36 through hole

38. Supporting mechanism

40. No. 1 supporting mechanism

42. No. 2 support mechanism

44. 1 st projection

46. The 1 st groove part

48. 1 st viscoelastic part

49. Upper end face

50. Lower end face

51. 52 (of the 1 st viscoelastic part)

53. The top surface

54. Bottom surface

55. 57 (of the 1 st projection)

56. 58 (of the 1 st groove part)

60. 2 nd convex part

62. The 2 nd groove part

64. No. 2 viscoelastic part

65. Upper end face

66. Lower end face

67. 68 (of the 2 nd viscoelastic part)

69. The top surface

70. Bottom surface

71. 73 (of the 2 nd projection)

71. 74 (of the 2 nd groove part)

76. Mounting part

78. Mounting hole

80. Mounted part

82. 1 st magnet

84. 1 st magnetic part

86. The 2 nd magnet

88. 2 nd frame

90. Base station

92. 2 nd cover

94. Through hole

98. Opening part

100. Flexible printing substrate

102. 1 st terminal part

104. 2 nd terminal part

106. 1 st coil

108. 2 nd coil

110 X-direction position detecting element

112 Y-direction position detecting element

114 Z-direction position detecting element

116. 2 nd magnetic member

118. Optical axis direction supporting mechanism

120. The 1 st support part

122. The 2 nd support part

124. No. 1 guide part

126. 2 nd guide part

128. Bottom surface part

130. Lower side fixing part

132. Upper side fixing part

134. Inserting hole

136. Supporting mechanism

138. Thereon is provided with

140. Below is

142. 3 rd viscoelastic part

144. 1 st concave part

146. 2 nd concave part

148. Upper end face

150. A lower end surface.

Claims (13)

1. An optical component driving apparatus characterized in that: comprises that

A fixed part,

A movable part which is arranged opposite to the fixed part and is provided with an optical component support body for supporting the optical component,

A supporting mechanism capable of supporting the movable part to move relative to the fixed part,

the support mechanism has one end surface fixed to the fixed portion and the other end surface fixed to the movable portion, and includes a viscoelastic portion made of a material having viscoelasticity.

2. The optical component driving device according to claim 1, wherein the one end surface and the other end surface of the support mechanism are parallel to each other, and the movable portion moves in a direction parallel to the one end surface and the other end surface with respect to the fixed portion.

3. The optical component driving device according to claim 1, wherein the supporting mechanism is formed in one of the fixed portion or the movable portion, has a groove portion that is long in a moving direction of the movable portion, and has a convex portion formed opposite to the groove portion in the other of the fixed portion or the movable portion, the one end surface is fixed to one of a bottom surface of the groove portion or a top surface of the convex portion, and the other end surface is fixed to the other of the bottom surface of the groove portion or the top surface of the convex portion.

4. The optical component driving device according to claim 3, wherein the convex portion is inserted into the groove portion.

5. The optical component driving device according to claim 4, wherein a gap between the groove portion and the convex portion in the moving direction of the movable portion is larger than a gap between the groove portion and the convex portion in a direction orthogonal to the moving direction.

6. The optical component driving device according to claim 4, wherein the convex portion is in contact with the groove portion when the movable portion moves to a predetermined position in a moving direction of the movable portion.

7. The optical component driving device according to claim 1, wherein the viscoelastic portion is in contact with the fixed portion and the movable portion only at the one end surface and the other end surface.

8. The optical component driving device according to claim 4, wherein an end face of the viscoelastic portion fixed to the top face of the convex portion is smaller than the top face of the convex portion.

9. Optical component driving device according to claim 1,

the optical component driving device comprises a 1 st component and a 2 nd component, wherein the 2 nd component is a fixed part, the 1 st component is a movable part relative to the 2 nd component and is a fixed part relative to the optical component support,

the support mechanism has a 1 st support mechanism capable of supporting the 1 st member to move relative to the 2 nd member in a 1 st direction orthogonal to the optical axis direction of the optical member, and a 2 nd support mechanism capable of supporting the optical member support to move relative to the 1 st member in a 2 nd direction orthogonal to the optical axis direction and the 1 st direction,

the one end surface of the viscoelastic portion of the 1 st support mechanism is fixed to the 2 nd member, the other end surface of the viscoelastic portion of the 2 nd support mechanism is fixed to the 1 st member, the one end surface of the viscoelastic portion of the 2 nd support mechanism is fixed to the 1 st member, and the other end surface of the viscoelastic portion of the 1 st support mechanism is fixed to the optical member support.

10. An optical component driving apparatus according to claim 1, wherein the shape of said one end face and said other end face is a circle or a regular polygon.

11. The optical component driving device according to any one of claims 1 to 10, wherein the viscoelastic portion is composed of at least one material selected from polyimide, polyethylene terephthalate, polyoxymethylene resin, polyacetal resin, ether urethane, silicone resin, butyl rubber, natural rubber, boron, special urethane, and urethane rubber.

12. An optical device characterized by having the optical component and the optical component driving device according to any one of claims 1 to 11.

13. An electronic device characterized by having the optical apparatus according to claim 12.

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