JP7628571B2 - Optical member driving device, camera device and electronic device - Google Patents

Description

The present invention relates to an optical element driving device, a camera device, and an electronic device.

Electronic devices such as mobile phones and smartphones are equipped with small camera devices. This type of small camera has a lens drive device, and as for this lens drive device, one with a camera shake correction function is known, as shown in Patent Document 1, for example.

JP 2009-217051 A

In the above-mentioned Patent Document 1, a guide mechanism is provided to allow the lens to move freely, and this guide mechanism includes multiple protrusions that slide against the guide surface of the guide recess.

However, this type of guide mechanism has the problem that the coefficient of friction between the protrusion and the guide surface can become large.

The present invention aims to solve the above-mentioned problems of the conventional art and provide an optical element drive device, a camera device, and an electronic device in which the coefficient of friction in the guide mechanism is unlikely to become large.

One aspect of the present invention is an optical element driving device, which has a guide mechanism for guiding the movement of an optical element, the guide mechanism having a support portion formed as a protrusion on a first member and a guide portion formed as a groove on a second member, the support portion fits into the guide portion so that the support portion and the guide portion slide, one of the sliding portions of the support portion and the guide portion being made of metal and the other being made of resin.

Preferably, the metal is a metal member that forms the bottom surface of the groove and is embedded in the body of the second member, which is made of resin.

Preferably, the metal member is plate-shaped, and the cross section perpendicular to the direction of movement of the portion constituting the bottom surface of the groove is V-shaped or U-shaped, and linear in shape parallel to the plate surface.

Preferably, the metal member has a rectangular outer shape, with the V-shaped or U-shaped portions provided at both ends of one of the two opposing sides, and the straight-line portions provided at both ends of the other side.

Preferably, the cross section of the support part in a direction perpendicular to the direction of movement is semicircular or semielliptical.

Preferably, there is one first member and two second members, the one first member has the support portion on both sides of the optical axis direction of the optical member, the two second members sandwich the first member from both sides of the optical axis direction and have a support member on one side for supporting the optical member, and the directions of the grooves of the guide portions provided on the two second members are perpendicular to each other.

Another aspect of the present invention is a camera device, which includes the optical element driving device of the above aspect and a lens as the optical element.

Another aspect of the present invention is a camera device, which includes the optical member driving device of the above aspect and an image sensor as the optical member.

Another aspect of the present invention is an electronic device that has the camera device of the above aspect.

According to the present invention, the guide mechanism has a support portion formed as a protrusion on the first member and a guide portion formed as a groove on the second member, and the support portion fits into the guide portion so that the support portion and the guide portion slide. One of the sliding portions of the support portion and the guide portion is made of metal, and the other is made of resin. Therefore, the coefficient of friction is kept small by contact between the metal and the resin. It is therefore possible to provide an optical element driving device, a camera device, and an electronic device in which the coefficient of friction in the guide mechanism is unlikely to become large.

1 is a perspective view of a lens driving device according to an embodiment of the present invention, as viewed obliquely from the front. 1 is a perspective view of a lens driving device according to an embodiment of the present invention, as viewed obliquely from behind; 1 is an exploded perspective view of a lens driving device according to an embodiment of the present invention, with a fixed body and a movable body disassembled, as viewed obliquely from the front. 1 is an exploded perspective view of a lens driving device according to an embodiment of the present invention, with all components disassembled, as viewed obliquely from the front. 1 is an exploded perspective view of a lens driving device according to an embodiment of the present invention, with all components disassembled, as viewed obliquely from the rear. FIG. 6A is an exploded perspective view of the second movable plate and the metal member embedded therein, and FIG. 6B is a perspective view showing the state in which the metal member is embedded in the second movable plate. FIG. 7A is an exploded perspective view of a lens support and a metal member embedded therein, and FIG. 7B is a view showing a state in which the metal member is embedded in the lens support. FIG. 4 is a plan view of the moving body 14 of FIG. 3 as viewed from the front. 9(A) is a cross-sectional view taken along line IXA-IXA in FIG. 8, FIG. 9(B) is a cross-sectional view taken along line IXB-IXB in FIG. 8, FIG. 9(C) is a cross-sectional view taken along line IXC-IXC in FIG. 8, and FIG. 9(D) is a cross-sectional view taken along line IXD-IXD in FIG.

An embodiment of the present invention will be described with reference to the drawings.

Figures 1 to 5 show a lens driving device 10 according to an embodiment of the present invention. The lens driving device 10 is used in a camera device mounted on an electronic device such as a smartphone together with a lens adopted as an optical member.

The lens drive device 10 has a fixed body 12 and a movable body 14 supported so as to be freely movable relative to the fixed body 12. As shown in Figures 4 and 5, the movable body 14 has a lens support 16 that supports a lens (not shown), and a first frame 18 that surrounds the lens support 16. The lens support 16 and the first frame 18 have an approximately rectangular external shape when viewed from the front.

For the sake of convenience, in this specification, the optical axis direction of the lens is referred to as the Z direction, the direction perpendicular to the optical axis direction is referred to as the X direction, and the direction perpendicular to the Z direction and the X direction is referred to as the Y direction. In addition, the subject side of the optical axis is referred to as the front side, and the opposite side where the image sensor (not shown) is located is referred to as the rear side.

A circular lens mounting hole 20 is formed on the inside of the lens support 16 when viewed from the Z direction, and the lens is mounted in this lens mounting hole 20.

The first frame 18 is composed of a first moving body plate 22, a second moving body plate 24, and a first cover 26. The lens support 16, the first moving body plate 22, and the second moving body plate 24 are made of engineering plastics such as liquid crystal polymer (LCP), polyacetal, polyamide, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, etc. The first cover 26 is made of metal, for example. The first moving body plate 22, the second moving body plate 24, and the first cover 26 are each formed with through holes 28, 30, and 32 for passing light. The through holes 28, 30, and 32 are each formed in an approximately circular shape.

The first frame 18 supports the lens support 16 so that it can move freely in both the Y and X directions. That is, the first frame 18 has an orthogonal support mechanism 34, and the lens support 16 can be moved freely in the X and Y directions via this orthogonal support mechanism 34.

The orthogonal support mechanism 34 is composed of a first support mechanism 36 and a second support mechanism 38 separated in the Z direction. The first support mechanism 36 is provided rearward in the Z direction and is composed of a first support portion 40 formed as a protrusion protruding in the -Z direction on the rear surface of the first moving body plate 22, and a first guide portion 42 formed as a groove recessed in the -Z direction on the front surface of the second moving body plate 24. The first support portion 40 fits into the first guide portion 42. The first support portion 40 and the first guide portion 42 each extend in the X direction and are formed near the four corners of the first moving body plate 22 and the second moving body plate 24. The first support portion 40 and the first guide portion 42 extending in the X direction are fitted together so as to restrict movement in the Y direction, so that the first moving body plate 22 is movable relative to the second moving body plate 24 only in the X direction.

In the first support mechanism 36, the first support portion 40 and the first guide portion 42 are disposed at each corner of the rectangular first movable body plate 22 and second movable body plate 24. Of these, the bottom surface of the first guide portion 42A on the -Y side where the first magnet 54 and magnetic member 86 are provided is V-shaped, and the bottom surface of the first guide portion 42B on the opposite +Y side forms a single flat surface. The corresponding first support portion 40A and first support portion 40B have the same shape.

The first support 40 is made of resin. The first guide 42 is made of resin, but the bottom surface of the groove in which the first support 40 slides is made of metal. Specifically, as shown in FIG. 6(A) and FIG. 6(B), a plate-shaped metal member 98 having an outer shape that is approximately the same as or slightly smaller than the outer shape of the second movable body plate 24 and a through hole in the center is insert-molded into the second movable body plate 24. Almost the entire metal member 98 is embedded in the main body of the second movable body plate 24 except for the bottom surface of the first guide 42, but is exposed in the groove as the bottom surface in the first guide 42. The metal member 98 is formed with a V-shaped first exposed portion 98A and a flat first exposed portion 98B in advance, and is insert-molded in that state.

As shown in Figures 9(A) and 9(B), when viewed from the X direction, the first guide portion 42A has a bottom surface formed by exposing the first exposed portion 98A of the V-shaped metal member 98. The first support portion 40A is also semicircular in shape. As a result, the arc-shaped curved portion of the first support portion 40A and the V-shaped flat portion of the first exposed portion 98A are in line contact with each other at two points. In other words, in a cross section in the Y-Z plane, they are in contact at two points.

The cross-sectional shape of the first support portion 40A is preferably one in which the corners do not abut the bottom surface, and may be, for example, a semi-elliptical shape. The cross-sectional shape of the first exposed portion 98A is V-shaped, but it may also be U-shaped. Line contact at two points ensures that the Y-direction position of the first support portion 40A relative to the first exposed portion 98A is determined without deviation.

Also, as shown in Figures 9(A) and 9(B), when viewed from the X direction, the first guide portion 42B has a bottom surface formed by exposing the first exposed portion 98B of the metal member 98, which has a planar portion extending in the XY direction.

The cross-sectional shape of the first support 40B is preferably a shape in which the corners do not abut the bottom surface, and may be, for example, a semi-elliptical shape. In this embodiment, it has the same shape as the first support 40A. This allows the height of the first moving body plate 22 in the Z direction relative to the second moving body plate 24 to be determined. In addition, the width of the first guide 42B in the Y direction is wider than the width of the first support 40B in the Y direction. Therefore, assembly is possible even if the dimension between the first support 40A and the first support 40B differs from the dimension between the first guide 42A and the first guide 42B within the tolerance range. This keeps the friction coefficient small due to contact between the metal and the resin. Therefore, the friction coefficient in the first support mechanism 36 is unlikely to become large.

The second support mechanism 38 is provided forward in the Z direction and is composed of a second support part 44 formed as a protrusion protruding in the +Z direction on the front surface of the first movable body plate 22, and a second guide part 46 formed as a groove recessed in the +Z direction on the rear surface of the lens support 16. The second support part 44 fits into the second guide part 46. The second support part 44 and the second guide part 46 extend in the Y direction and are formed near the four corners of the lens support 16 and the first movable body plate 22. The second support part 44 and the second guide part 46 extending in the Y direction fit together to restrict movement in the X direction, so that the lens support 16 is free to move only in the Y direction relative to the first movable body plate 22.

The second support portion 44 and the second guide portion 46 are disposed at each corner of the rectangular first movable body plate 22 and the lens support 16. Of these, the bottom surface of the second guide portion 46A on the +X side where the first magnet 54 and the magnetic member 86 are provided is V-shaped, and the bottom surface of the second guide portion 46B on the -X side is a single flat surface. The corresponding second support portion 44A and second support portion 44B have the same shape.

The second support part 44 is made of resin. The second guide part 46 is made of resin, but the bottom surface of the groove in which the second support part 44 slides is made of metal. Specifically, as shown in FIG. 7(A) and FIG. 7(B), a plate-shaped metal member 100 having an outer shape that is approximately the same as or slightly smaller than the outer shape of the lens support part 16 and a through hole in the center is insert-molded into the lens support part 16. This metal member 100 is almost entirely embedded in the lens support part 16 body except for the bottom surface of the second guide part 46, but is exposed in the groove as the bottom surface in the second guide part 46. The metal member 100 is formed in advance with a V-shaped second exposed part 100A and a flat second exposed part 100B, and is insert-molded in that state.

As shown in Figures 9(C) and 9(D), when viewed from the Y direction, the second guide portion 46A has the second exposed portion 100A of the V-shaped metal member 100 exposed to form the bottom surface. The second support portion 44A is semicircular in shape. As a result, the arc-shaped curved surface portion of the second support portion 44A and the linear flat portion of the V-shape of the second exposed portion 100A are in line contact with each other at two points. In other words, in a cross section in the X-Z plane, they are in contact at two points.

The cross-sectional shape of the second support portion 44A is preferably one in which the corners do not abut the bottom surface, and may be, for example, a semi-elliptical shape. The cross-sectional shape of the second exposed portion 100A is V-shaped, but it may also be U-shaped. Line contact at two points ensures that the position of the second exposed portion 100A in the X direction relative to the second support portion 44A is determined without any deviation.

Also, as shown in Figures 9(C) and 9(D), when viewed from the Y direction, the second guide portion 46B has a bottom surface formed by exposing the second exposed portion 100B of the metal member 100, which has a planar portion extending in the X-Y direction.

The cross-sectional shape of the second support 44B is preferably a shape in which the corners do not abut the bottom surface, and may be, for example, a semi-elliptical shape. In this embodiment, it has the same shape as the second support 44A. This allows the height of the lens support 16 in the Z direction relative to the first moving body plate 22 to be determined. In addition, the width of the second guide 46B in the X direction is wider than the width of the second support 44B in the X direction. Therefore, even if the dimension between the second support 44A and the second support 44B differs from the dimension between the second guide 46A and the second guide 46B within the tolerance range, assembly is possible. This keeps the friction coefficient small due to contact between the metal and the resin. Therefore, the friction coefficient in the second support mechanism 38 is unlikely to become large.

The metal members 98, 100 are made of a non-magnetic metal, such as stainless steel. The surfaces of the first exposed portions 98A, 98B and the second exposed portions 100A, 100B may be polished to a mirror finish or chemically polished to reduce the surface roughness and the coefficient of friction. A lubricant may be interposed between the first support portion 40 and the first guide portion 42, and between the second support portion 44 and the second guide portion 46.

The structure of the first support mechanism 36 and the second support mechanism 38 of the orthogonal support mechanism 34 described above can also be explained as follows. The first support mechanism 36 has a first support portion 40 formed as a protrusion on the first movable body plate 22 as the first member, and a first guide portion 42 formed as a groove on the second movable body plate 24 as the second member. The first support portion 40 fits into the first guide portion 42, and the first support portion 40 and the first guide portion 42 slide. The bottom surface of the first guide portion 42, which is one of the sliding portions of the first support portion 40 and the first guide portion 42, is made of metal, and the other, the first support portion 40, is made of resin.

The second support mechanism 38 has a second support portion 44 formed as a protrusion on the first movable body plate 22 as the first member, and a second guide portion 46 formed as a groove on the lens support 16 as the second member. The second support portion 44 fits into the second guide portion 46, and the second support portion 44 and the second guide portion 46 slide. The bottom surface of the second guide portion 46, which is one of the sliding portions of the second support portion 44 and the second guide portion 46, is made of metal, and the other, the second support portion 44, is made of resin.

In the orthogonal direction support mechanism 34, the first movable body plate 22, which is the first member, has a first support portion 40 and a second support portion 44 on both sides in the optical axis direction of the lens, which is an optical member. The second movable body plate 24, which is the second member, and the lens support 16 sandwich the first movable body plate 22 from both sides in the optical axis direction, and one of the two second members is the lens support 16 for supporting the lens. The directions of the grooves of the first guide portion 42 and the second guide portion 46 provided on the two second members are orthogonal to each other.

Attachment parts 48 are provided at the four corners of the first cover 26 so as to extend rearward in the Z direction. These attachment parts 48 have rectangular attachment holes 50 formed therein. Additionally, attachment receiving parts 52 are formed at the four corners of the second movable body plate 24 so as to protrude laterally. The attachment receiving parts 52 fit into the attachment holes 50, and the first cover 26 is fixed to the second movable body plate 24.

A first magnet 54 and a first yoke 56 are fixed to the +X side and -Y side surfaces of the outer surface of the lens support 16. The first magnet 54 on the +X side surface has an S pole and an N pole formed in the X direction. The first magnet 54 on the -Y side surface has an S pole and an N pole formed in the Y direction.

A second magnet 58 and a second yoke 60 are fixed to the +Y side surface of the second movable body plate 24. This second magnet 58 is divided into two in the Z direction, with an S pole and an N pole formed in the Y direction, and the polarity is reversed at the front and rear. A magnetic member 86 is fixed to the bottom surface of the second movable body plate 24 in correspondence with the rear of the first magnet 54. This causes the lens support 16 to be attracted to the second movable body plate 24 together with the first movable body plate 22, and the movable body 14 is assembled into a single member.

Next, the relationship between the fixed body 12 and the moving body 14 will be described. The fixed body 12 has a second frame 62. This second frame 62 surrounds the periphery of the first frame 18 of the moving body 14. This second frame 62 has a base 64 and a second cover 66 attached to this base 64. The base 64 and the second cover 66 are rectangular when viewed from the front, and the second frame 62 is formed by fitting the second cover 66 to the outside of the base 64. In addition, through holes 72, 74 are formed in the bottom surface portion 68 of the base 64 and the front surface portion 70 of the second cover 66 to pass light or to insert a lens.

At the four corners of the base 64, a support section 76 is formed that splits into two parts with the corners in between, rising forward from the bottom surface section 68. A flexible printed circuit board 78 is disposed on the outside of the base 64 so as to surround this support section 76. The flexible printed circuit board 78 is bent into a quadrangle so as to surround three sides of the exterior shape of the base 64 and fixed to the support section 76, and a terminal section 80 is formed at the rear of the flexible printed circuit board 78. The supply of electricity to a first coil 82 and a second coil 84, which will be described later, is controlled via this terminal section 80, but is not limited to this.

A first coil 82 is fixed to the +X direction portion and the -Y direction portion on the inside of the flexible printed circuit board 78. A second coil 84 is fixed to the +Y direction portion on the inside of the flexible printed circuit board 78. The first coil 82 faces the first magnet 54, and the second coil 84 faces the second magnet 58.

A magnetic member 86 made of a magnetic material is provided on the outside of the +Y direction portion of the flexible printed circuit board 78. This magnetic member 86 faces the second magnet 58 with the flexible printed circuit board 78 and the second coil 84 sandwiched between them. Since magnetic flux from the second magnet 58 flows through the magnetic member 86, an attractive force is generated between the second magnet 58 and the magnetic member 86. As a result, an attractive force acts on the moving body 14 in the +Y direction toward the fixed body 12.

The movable body 14 is supported by an optical axis direction support mechanism 88 so that it can move freely in the Z direction relative to the fixed body 12. The optical axis direction support mechanism 88 is composed of a main guide shaft 90 and a sub-guide shaft 92 provided on the base 64, and a guide hole 94 and a guide wall 96 provided on the movable body 14.

In the above configuration, when electricity is applied to the first coil 82 facing the first magnet 54 on the +X side surface, a Lorentz force acts on the first coil 82 in the X direction. Since the first coil 82 is fixed to the base 64, the reaction acting on the first magnet 54 becomes a driving force for the lens support 16 and the first movable body plate 22, and the lens support 16 and the first movable body plate 22 move in the X direction while being supported by the first support mechanism 36.

In the first support mechanism 36, the first support part 40 slides against the first exposed parts 98A and 98B of the metal member 98 exposed in the first guide part 42. Since the first support part 40 is made of resin and the first exposed parts 98A and 98B are made of metal, the coefficient of friction is kept small and they slide smoothly against each other.

When current is applied to the first coil 82 facing the first magnet 54 on the -Y side surface, a Lorentz force acts on the first coil 82 in the Y direction. Because the first coil 82 is fixed to the base 64, the reaction acting on the first magnet 54 becomes a driving force for the lens support 16, and the lens support 16 moves in the Y direction while being supported by the second support mechanism 38.

In the second support mechanism 38, the second support portion 44 slides against the second exposed portions 100A and 100B of the metal member 100 exposed in the second guide portion 46. Since the second support portion 44 is made of resin and the second exposed portions 100A and 100B are made of metal, the coefficient of friction is kept small and they slide smoothly against each other.

After the lens support 16 has moved in at least one of the X and Y directions, the power supply to the first coil 82 is stopped. Then, due to the attractive force between the first magnet 54 and the magnetic member 86 and the friction between the first support part 40 and the metal member 98, and between the second support part 44 and the metal member 100, the lens support 16 stops at the position where the power supply was stopped.

In the above embodiment, an example was described in which the first support 40 and the second support 44 are provided on the first movable plate 22, the first guide 42 is provided on the second movable plate 24 so as to face them, and the second guide 46 is provided on the lens support 16. The first exposed parts 98A and 98B are exposed on the bottom surface of the first guide 42, and the second exposed parts 100A and 100B are exposed on the bottom surface of the second guide 46. Since the metal member is exposed at the sliding part in the guide, the friction coefficient between the resin support part is kept small, and the friction force is also small, so they slide smoothly against each other. According to this configuration, when resin slides against resin, the friction coefficient is about 0.2 even when a lubricant is used, whereas when metal slides against resin, the friction coefficient is about 0.1. Thus, because the friction force is small, the required driving force is smaller than that of a structure that does not have a sliding surface between resin and metal, and the power consumption for driving can be reduced.

It is also possible to interchange the protrusions and grooves, forming guide sections as grooves on the front and rear surfaces of the first movable body plate 22, embedding a metal member in the first movable body plate 22, and forming an exposed section of the metal member within the guide section. Then, facing these, the second movable body plate 24 and the lens support 16 may have support sections formed as protrusions. Also, only the front side or only the rear side may be interchanged.

In the above embodiment, an example was described in which the first coil 82 and the second coil 84 were attached to the fixed body 12, and the first magnet 54 and the second magnet 58 were attached to the moving body 14. However, the first coil 82 and the second coil 84 may be attached to the moving body 14, and the first magnet 54 and the second magnet 58 may be attached to the fixed body 12.

In the above embodiment, an exposed portion of a plate-shaped metal member is formed within the guide portion. However, the present invention is not limited to the above embodiment, and the guide portion may be formed of resin and the support portion may be made of metal. The support portion may be formed, for example, by embedding a metal shaft in the first movable body plate 22. In addition, both the guide portion and the support portion may be made of metal.

In the above embodiment, the lens driving device 10 used in a camera device is described, but the present invention can also be applied to other devices.

In the above embodiment, a guide mechanism having an exposed portion of a metal member within a guide portion is applied to an orthogonal direction guide mechanism for camera shake correction that moves a lens support in a direction perpendicular to the optical axis direction of the lens. However, the present invention is not limited to the above embodiment, and may be applied to an optical axis direction guide mechanism for autofocus that supports a fixed body 12 and a movable body 14 that moves relative to the fixed body 12 in the optical axis direction of the lens. Also, for example, an image sensor may be used as an optical member, and the orthogonal direction guide mechanism for camera shake correction that moves the image sensor in a direction perpendicular to the optical axis.

In this case, the guide mechanism has a support portion formed in a first member, which is either the fixed body 12 or the movable body 14, and a guide portion provided in a second member, which is the other of the fixed body 12 and the movable body 14. At least a part of the portion where the guide portion is formed is made of metal. Specifically, for example, a plate-shaped metal member may be embedded in the second member, and an exposed portion of the metal member may be formed in the guide portion so as to slide against the support portion. The support portion may be made of resin. Alternatively, the support portion may be made of metal, and the guide portion may be made of resin.

REFERENCE SIGNS LIST 10 Lens drive device 12 Fixed body 14 Movable body 16 Lens support 18 First frame 20 Lens mounting hole 22 First movable body plate 24 Second movable body plate 26 Cover 28, 30, 32 Through hole 34 Orthogonal direction support mechanism 36 First support mechanism 38 Second support mechanism 40, 40A, 40B First support portion 42, 42A, 42B First guide portion 44, 44A, 44B Second support portion 46, 46A, 46B Second guide portion 48 Mounting portion 50 Mounting hole 52 Mounted portion 54 First magnet 56 First yoke 58 Second magnet 60 Second yoke 62 Second frame 64 Base 66 Second cover 68 Bottom portion 70 Front portion 72, 74 Through hole 76 Support portion 78 Flexible printed circuit board 80 Terminal portion 82 First coil 84 Second coil 86 Magnetic member 88 Optical axis direction support mechanism 90 Main guide shaft 92 Sub guide shaft 94 Guide hole 96 Guide wall 98 Metal member 98A, 98B First exposed portion 100 Metal member 100A, 100B Second exposed portion

Claims (6)

A guide mechanism for guiding the movement of the optical member is provided.
The guide mechanism has a support portion formed as a protrusion on a first member and a guide portion formed as a groove on a second member, the support portion being fitted into the guide portion so that the support portion and the guide portion slide against each other,
The sliding portion of the support portion is made of resin,
a sliding portion of the guide portion is a bottom surface of the groove, and the bottom surface of the groove is formed by exposing a metal member in the groove, the metal member being embedded in a body of the second member made of resin except for the bottom surface of the groove;
The metal member is a single plate-like member having a rectangular outer shape, and at both ends of one of the two opposing sides of the main body portion, a portion is provided which is partially separated from the main body portion by a cut and has a V-shaped or U-shaped cross section in a direction perpendicular to the direction of guiding movement, and at both ends of the other side, a portion is provided which is partially separated from the main body portion by a cut and has a straight cross section in a direction perpendicular to the direction of guiding movement that is parallel to the plate surface of the plate-like member.
Optical element drive device. The optical element driving device according to claim 1 , wherein a cross section of the support portion in a direction perpendicular to the direction in which the support portion guides the movement is semicircular or semielliptical. The device has one first member and two second members,
the first member has the support portions on both sides of the optical member in the optical axis direction,
the two second members sandwich the first member from both sides in the optical axis direction, and one of the second members has a support body for supporting the optical member;
The optical member driving device according to claim 1 , wherein the directions of the grooves of the guide portions provided on the two second members are perpendicular to each other. A camera device comprising the optical member driving device according to claim 1 and a lens as the optical member. A camera device comprising the optical member driving device according to claim 1 and an image sensor as the optical member. 6. An electronic device comprising the camera device according to claim 4 .