JP2011203476A - Photographic optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographic optical device that can be made more compact compared with a conventional one.SOLUTION: The photographic optical device 1 includes: a movable module 2 including a movable body 5 which can move together with a lens in an optical axis direction and a holder 6 which movably holds the movable body 5 in the optical axis direction; a support 3 which supports the movable module 2 so as to be oscillated; a lens driving coil 22 attached to the movable body 5; a shake correction coil 23 attached to the support 3; and a driving magnet 24 attached to the holder 6. The driving magnet 24 includes a first opposed surface 24c which is opposed to the lens driving coil 22 and a second opposed surface 24d which is opposed to the shake correction coil 23. A lens driving mechanism 20 for driving the movable body 5 in the optical direction is constituted of the lens driving coil 22 and the driving magnet 24, and a shake correction mechanism 21 for correcting the shake by oscillating the movable module 2 is constituted of the shake correction coil 23 and the driving magnet 24.

Description

  The present invention relates to a photographing optical apparatus having a shake correction function for correcting shake by swinging a movable module on which a lens and an image sensor are mounted.

  2. Description of the Related Art In recent years, a photographing optical device is mounted on a portable device such as a cellular phone. In the case of a mobile device, camera shake tends to occur during shooting. In view of this, a photographic optical device capable of correcting camera shake during photographing has been proposed by the present applicant (see, for example, Patent Document 1).

  A photographic optical device described in Patent Document 1 includes a movable module on which a lens and an image sensor are mounted, a fixed body that supports the movable module, and a camera shake correction that swings the movable module on the fixed body to correct camera shake. Mechanism. The movable module includes a movable body that holds the lens and can move in the optical axis direction, a support that supports the movable body so as to move in the optical axis direction, a lens driving coil that moves the movable body in the optical axis direction, and And a lens driving magnet. The lens driving coil is wound around the outer peripheral surface of the moving body. In addition, a rectangular cylindrical case constituting the support body is arranged so as to surround the outer peripheral surface of the moving body, and the lens driving magnet is fixed to the inner peripheral surface of the case so as to face the lens driving coil. ing.

  In addition, in the photographing optical device described in Patent Literature 1, the camera shake correction mechanism includes a camera shake correction coil and a camera shake correction magnet. The camera shake correction magnet is fixed to the outer peripheral surface of the yoke fixed to the case so as to cover the outer surface of the case. In addition, a rectangular cylindrical fixed body that constitutes the outer peripheral surface of the photographing optical device is disposed so as to surround the outer peripheral surface of the yoke, and the camera shake correction coil is disposed on the fixed body so as to face the camera shake correcting magnet. It is fixed to the inner peripheral surface.

JP 2009-294393 A

  In recent years, in the market for mobile devices such as mobile phones, there has been an increasing demand for miniaturization of mobile devices, and as a result, there has been a further increase in the demand for miniaturization of optical imaging devices mounted on mobile devices.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an imaging optical device that can be made smaller than before.

  In order to solve the above problems, a photographing optical device according to the present invention includes a movable body that holds a lens and is movable in the optical axis direction of the lens, and a movable body that holds the movable body so as to be movable in the optical axis direction. A module, a support that supports the movable module in a swingable manner, a lens driving coil that is attached to the movable body, a shake correction coil that is attached to the support, and a first opposing surface that faces the lens driving coil. A driving magnet having a second facing surface facing the shake correction coil and attached to the holding body. The lens driving coil and the driving magnet move the movable body in the optical axis direction with respect to the holding body. At least a part of the lens driving mechanism for driving is configured, and the shake compensation for correcting the shake by swinging the movable module with respect to the support by the shake correction coil and the drive magnet. At least a portion of the mechanism is characterized by being composed.

  In the photographic optical device of the present invention, the lens driving coil and the driving magnet constitute at least a part of a lens driving mechanism for driving the movable body in the optical axis direction with respect to the holding body. The coil and the drive magnet constitute at least a part of a shake correction mechanism for correcting the shake by swinging the movable module with respect to the support. That is, in the present invention, a magnetic circuit for moving the lens in the optical axis direction and a magnetic circuit for correcting shake are formed by a common driving magnet.

  Therefore, as in the prior art, a lens driving magnet that forms a magnetic circuit for moving the lens in the optical axis direction and a shake correction magnet that forms a magnetic circuit for correcting shake are separately provided. The number of parts can be reduced as compared with the case where it is present. In general, since the minimum magnet thickness required to secure a predetermined magnetic flux density is determined, in the present invention, the lens driving magnet and the shake correction magnet are provided separately. In this case, the thickness of the driving magnet can be made thinner than the sum of the thickness of the lens driving magnet and the thickness of the shake correction magnet. Therefore, in the present invention, it is possible to reduce the size of the photographing optical device more than before. In the present invention, the driving magnet is compared with the sum of the thickness of the lens driving magnet and the thickness of the shake correcting magnet when the lens driving magnet and the shake correcting magnet are provided separately. Therefore, the weight of the driving magnet that swings with the movable module can be reduced.

  In the present invention, for example, the holding body includes a substantially cylindrical magnet holding member that forms at least a part of the outer peripheral surface of the movable module and holds the driving magnet, and the lens driving coil is included in the magnet holding member. The vibration correction coil is arranged on the peripheral side, and the vibration correcting coil is arranged on the outer peripheral side of the magnet holding member. The driving magnet has a first opposing surface facing the inner peripheral side of the magnet holding member and a second opposing surface being the magnet holding member. It is fixed to the magnet holding member so as to face the outer peripheral side.

  In the present invention, for example, the magnet holding member is formed in a substantially square tube shape having a substantially square shape or a substantially rectangular shape when viewed from the optical axis direction, and the driving magnet is formed in a substantially flat plate shape. The magnet holding member is fixed to at least two side surfaces orthogonal to each other among the four side surfaces. In this case, the lens can be moved in the optical axis direction and the shake can be corrected using a substantially flat driving magnet having a relatively simple shape.

  In the present invention, for example, the magnet holding member is formed in a substantially square cylindrical shape whose shape when viewed from the optical axis direction is a substantially square shape or a substantially rectangular shape, and the driving magnet is formed of the four corners of the magnet holding member. Are fixed to at least two positions adjacent to each other. In this case, since the driving magnets are disposed at the four corners of the magnet holding member that is likely to become a dead space, it is possible to further reduce the size of the photographing optical device.

  In the present invention, the magnet holding member is preferably made of a nonmagnetic material. With this configuration, the magnet holding member can be formed of a light material such as resin. Therefore, the magnet holding member is movable by the shake correction mechanism as compared with the case where the magnet holding member is formed of a magnetic material. It becomes possible to reduce the weight of the module.

  In the present invention, the drive magnet is preferably magnetized so that two different magnetic poles overlap in the optical axis direction on the first facing surface and the second facing surface. With this configuration, it is possible to increase the driving force of the lens driving mechanism and the shake correction mechanism as compared with the case where the driving magnet is magnetized to a single pole.

  As described above, according to the present invention, it is possible to make the photographic optical device more compact than before.

1 is a perspective view of a photographic optical device according to an embodiment of the present invention. It is sectional drawing of the EE cross section of FIG. It is a disassembled perspective view of the optical device for imaging shown in FIG. FIG. 4 is a plan view for explaining an arrangement relationship among a lens driving coil, a shake correction coil, and a driving magnet shown in FIG. 3. It is a top view for demonstrating the structure and arrangement | positioning relationship of the lens drive coil concerning another embodiment of this invention, the shake correction coil, and the drive magnet.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Schematic structure of optical device for photographing)
FIG. 1 is a perspective view of a photographing optical apparatus 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line EE of FIG. FIG. 3 is an exploded perspective view of the photographing optical device 1 shown in FIG. In the following description, as shown in FIG. 1, the three directions orthogonal to each other are the X direction, the Y direction, and the Z direction, the X direction is the left-right direction, the Y direction is the front-rear direction, and the Z direction is the up-down direction. To do. Further, the Z1 direction side in FIG. 1 and the like is the “upper” side, and the Z2 direction side is the “lower” side.

  The photographing optical device 1 of this embodiment is a small and thin camera mounted on a portable device such as a mobile phone, a drive recorder, a surveillance camera system, or the like, and is formed in a substantially quadrangular prism shape as a whole. In this embodiment, the photographing optical device 1 is formed so that the shape of the photographing lens when viewed from the direction of the optical axis L (optical axis direction) is a substantially square shape. These four side surfaces are substantially parallel to the left-right direction or the front-rear direction.

  As shown in FIGS. 1 and 2, the photographing optical device 1 includes a movable module 2 on which a lens and an imaging device (not shown) are mounted, and a support 3 that supports the movable module 2 so as to be swingable. ing. The movable module 2 is connected to the support 3 by a leaf spring (not shown).

  In the present embodiment, the vertical direction substantially coincides with the optical axis direction of the lens driving device 2 when the lens driving device 2 is not swinging. In this embodiment, an image sensor is mounted on the lower end of the movable module 2, and a subject placed on the upper side is photographed. That is, in this embodiment, the upper side (Z1 direction side) is the subject side (object side), and the lower side (Z2 direction side) is the anti-subject side (imaging element side, image side).

  The movable module 2 is formed in a substantially quadrangular prism shape as a whole. In this embodiment, the movable module 2 is formed so as to have a substantially square shape when viewed from the optical axis direction, and the four side surfaces of the movable module 2 are substantially parallel to the left-right direction or the front-rear direction. ing. As shown in FIG. 2, the movable module 2 includes a movable body 5 that holds a lens and is movable in the optical axis direction, and a holding body 6 that holds the movable body 5 so as to be movable in the optical axis direction. . The movable body 5 is movably held by the holding body 6 via a leaf spring (not shown). That is, the movable body 5 and the holding body 6 are connected by a leaf spring.

  The movable body 5 includes a sleeve 8 that holds a lens holder 7 to which a plurality of lenses are fixed. The holding body 6 includes a cover member 10 constituting a part of four side surfaces (outer peripheral surfaces) of the movable module 2 and a base member 11 constituting an end surface of the movable module 2 on the side opposite to the subject. In addition, illustration of the lens holder 7 is abbreviate | omitted in FIG.

  The lens holder 7 is formed in a substantially cylindrical shape. A plurality of lenses are fixed on the inner peripheral side of the lens holder 7. The sleeve 8 is formed of, for example, a resin material and has a substantially cylindrical shape. Specifically, the sleeve 8 has a substantially cylindrical shape in which the inner periphery of the sleeve 8 is circular when viewed from the optical axis direction, and the outer periphery of the sleeve 8 is substantially square when viewed from the optical axis direction. Is formed. The sleeve 8 holds the lens holder 7 on its inner peripheral side. That is, the outer peripheral surface of the lens holder 7 is fixed to the inner peripheral surface of the sleeve 8.

  The cover member 10 is made of a nonmagnetic material. For example, the cover member 10 is made of a resin material. The cover member 10 is formed in a substantially rectangular tube shape with a bottom (substantially bottomed square tube shape) having a bottom portion 10a and a tube portion 10b. The bottom portion 10 a is disposed on the upper side and constitutes an end surface on the subject side of the movable module 2. A circular through hole 10c is formed at the center of the bottom 10a. Fixing holes 10d to which driving magnets 24 to be described later are fixed are formed on the four side surfaces constituting the cylindrical portion 10b so as to penetrate in the front-rear direction or the left-right direction. The cover member 10 is disposed so as to surround the outer peripheral side of the movable body 5. The cover member 10 of this embodiment is a magnet holding member that holds a driving magnet 24 described later. Note that the cover member 10 may be formed of a magnetic material.

  A spacer member 12 is fixed to the lower surface of the bottom 10a of the cover member 10 as shown in FIG. The spacer member 12 is formed in a substantially square frame shape. A part of the above-described leaf spring that connects the movable body 5 and the holding body 6 is fixed to the spacer member 12.

  The base member 11 is formed of a resin material and is formed in a substantially square flat plate shape. The base member 11 is fixed to the lower end of the cylindrical portion 10 b of the cover member 10. A through hole 11a is formed at the center of the base member 11, and an image sensor is disposed in the through hole 11a.

  The image sensor is mounted on the substrate 13. The substrate 13 is fixed to the lower surface of the base member 11. A gyroscope for detecting a change in the tilt of the movable module 2 is mounted on the substrate 13. Further, an FPC (flexible printed circuit board) 14 is connected to the substrate 13, and the FPC 14 is drawn around the lower end side of the photographing optical device 1 and pulled out from the side surface of the photographing optical device 1.

  The support 3 includes a case body 17 that constitutes the lower surface of the photographing optical device 1 and four side surfaces (outer peripheral surfaces) of front, rear, left and right. The case body 17 is made of a nonmagnetic material. For example, the case body 17 is formed of a resin material. The case body 17 is formed in a substantially rectangular tube shape with a bottom (substantially bottomed rectangular tube shape) having a bottom portion 17a and a tube portion 17b. The bottom portion 17a is disposed on the lower side and constitutes an end surface of the photographing optical device 1 on the side opposite to the subject. The cylinder part 17b is arrange | positioned so that the movable module 2 may be enclosed from an outer peripheral side.

  As shown in FIG. 2, a fulcrum projection member 18 serving as a fulcrum for swinging the movable module 2 is fixed to the center of the bottom 17a of the case body 17 so as to protrude upward. The upper end of the fulcrum projecting member 18 is formed in a hemispherical shape, for example, and is in contact with the lower surface of the substrate 13.

  In addition, the photographing optical device 1 includes a lens driving mechanism 20 for driving the movable body 5 in the optical axis direction with respect to the holding body 6, and a movable module 2 with respect to the support body 3 by swinging the movable module 2. A shake correction mechanism 21 for correcting shake is provided. Hereinafter, configurations of the lens driving mechanism 20 and the shake correction mechanism 21 will be described.

(Configuration of lens drive mechanism and shake correction mechanism)
FIG. 4 is a plan view for explaining the positional relationship among the lens driving coil 22, the shake correction coil 23, and the driving magnet 24 shown in FIG.

  Two lens driving coils 22 constituting the lens driving mechanism 20 are attached to the outer peripheral surface of the sleeve 8. The lens driving coil 22 is wound along the outer peripheral surface of the sleeve 8. That is, the lens driving coil 22 is wound in a substantially square cylindrical shape. The two lens driving coils 22 are wound so that their winding directions are different from each other. For example, one lens driving coil 22 is wound in the clockwise direction of FIG. 4, and the other lens driving coil 22 is wound in the counterclockwise direction of FIG. The two lens driving coils 22 are fixed to the outer peripheral surface of the sleeve 8 with a predetermined interval in the vertical direction.

  A shake correction coil 23 that constitutes a shake correction mechanism 21 is attached to each of the four inner surfaces that constitute the inner peripheral surface of the cylindrical portion 17 b of the case body 17. The shake correction coil 23 is an air-core coil formed by being wound into a flat, substantially rectangular shape, and includes two long side portions 23a that are substantially parallel to each other. The shake correction coil 23 has a thickness direction that coincides with the thickness direction of the cylindrical portion 17b, and the long side portion 23a is substantially parallel to the front-rear direction or the left-right direction (that is, substantially rectangular). Are fixed to each of the four inner surfaces of the cylindrical portion 17b so that the short side direction and the vertical direction of the shake correction coil 23 wound in the shape of each other substantially coincide with each other.

  In this embodiment, the two shake correction coils 23 fixed to the front and back inner surfaces of the cylindrical portion 17b are formed by sequentially winding one conductive wire. Further, the two shake correction coils 23 fixed to the left and right inner surfaces of the cylindrical portion 17b are formed by sequentially winding one conductive wire.

  A driving magnet 24 formed in a substantially rectangular flat plate shape is fixed to each of the four side surfaces constituting the cylindrical portion 10 b of the cover member 10. The driving magnet 24 fixed to the side surface of the cylindrical portion 10b has a thickness direction that matches the thickness direction of the cylindrical portion 10b, and a longitudinal direction that substantially matches the left-right direction or the front-rear direction (that is, , So that the short side direction substantially coincides with the vertical direction), it is fixed to the fixing hole 10d of the cylindrical portion 10b.

  The drive magnet 24 is composed of two magnet pieces, a first magnet piece 24a and a second magnet piece 24b, which are formed in a substantially rectangular flat plate shape. Specifically, the first magnet piece 24a and the second magnet piece 24b are bonded and fixed to each other while the lower surface of the first magnet piece 24a and the upper surface of the second magnet piece 24b are in contact with each other. A magnet 24 is formed.

  The drive magnet 24 is magnetized so that the magnetic pole formed on one side surface is different from the magnetic pole formed on the other side surface. That is, the driving magnet 24 fixed to the left and right side surfaces of the cover member 10 is magnetized so that the magnetic pole formed on the right side surface of the driving magnet 24 is different from the magnetic pole formed on the left side surface. The driving magnet 24 fixed to the front and rear side surfaces of the cover member 10 is magnetized so that the magnetic pole formed on the front side surface of the driving magnet 24 and the magnetic pole formed on the rear side surface are different.

  The drive magnet 24 is magnetized so that two different magnetic poles overlap in the vertical direction on the side surface. Specifically, the driving magnets 24 fixed to the left and right side surfaces of the cover member 10 are formed on the magnetic poles formed on the outer surface of the first magnet piece 24a and the outer surface of the second magnet piece 24b in the left-right direction. (Ie, the magnetic pole formed on the inner surface of the first magnet piece 24a in the left-right direction is different from the magnetic pole formed on the inner surface of the second magnet piece 24b). Yes. The driving magnet 24 fixed to the front and rear side surfaces of the cover member 10 includes a magnetic pole formed on the outer surface of the first magnet piece 24a and a magnetic pole formed on the outer surface of the second magnet piece 24b in the front-rear direction. Are magnetized differently.

  In this embodiment, the magnetic poles on the inner side surface of the first magnet piece 24a fixed to the front, rear, left and right side surfaces of the cover member 10 are all the same magnetic pole (that is, the first fixed to the front, rear, left and right side surfaces of the cover member 10). The four drive magnets 24 are fixed to the cylindrical portion 10b (so that all the magnetic poles on the inner surface of the two magnet pieces 24b are the same magnetic pole). That is, in this embodiment, the magnetic poles on the outer surface of the first magnet piece 24a fixed to the front, rear, left and right side surfaces of the cover member 10 are all the same magnetic pole (that is, fixed to the front, rear, left and right side surfaces of the cover member 10). The four driving magnets 24 are fixed to the cylindrical portion 10b so that the magnetic poles on the outer surface of the second magnet piece 24b are all the same.

  For example, the magnetic poles on the inner side in the front / rear / left / right direction of the first magnet piece 24a are S poles, the magnetic poles on the outer side in the front / rear / left / right directions of the first magnet piece 24a are N poles, and the front / rear left / right directions of the second magnet piece 24b. The driving magnet 24 is fixed to the cylindrical portion 10b so that the magnetic pole on the inner surface becomes the N pole and the magnetic pole on the outer surface in the front-rear and left-right directions of the second magnet piece 24b becomes the S pole.

  The inner side surface of the first magnet piece 24a in the front / rear / right / left direction has a predetermined gap from the outer peripheral surface of one of the two lens driving coils 22 arranged on the inner peripheral side of the cylindrical portion 10b. The inner surface of the second magnet piece 24b in the front-rear and left-right directions is opposed to the outer peripheral surface of the other lens driving coil 22 with a predetermined gap. The outer surface of the first magnet piece 24a in the front / rear / left / right direction is the surface of one long side portion 23a of the two long side portions 23a of the shake correction coil 23 arranged on the outer peripheral side of the cylindrical portion 10b. The outer surface of the second magnet piece 24b in the front / rear / left / right direction opposes the surface of the other long side portion 23a via the predetermined gap.

  In this embodiment, the lens driving mechanism 20 is configured by the lens driving coil 22 and the driving magnet 24. When a current is supplied to the lens driving coil 22, the lens together with the movable body 5 moves in the optical axis direction. Moving. In this embodiment, the shake correction mechanism 21 is configured by the shake correction coil 23 and the drive magnet 24, and when a change in the tilt of the movable module 2 is detected by the gyroscope mounted on the substrate 13. A current is supplied to the shake correction coil 23 based on the detection result of the gyroscope. Further, when a current is supplied to the shake correction coil 23, the movable module 2 swings so that the optical axis L is tilted about the fulcrum portion 19, and the shake is corrected.

  In this embodiment, the inner surface of the driving magnet 24 in the front / rear / left / right direction is a first facing surface 24c facing the lens driving coil 22 and the outer surface of the driving magnet 24 in the front / rear / left / right direction is shake correction. This is a second facing surface 24 d that faces the coil 23 for use.

(Main effects of this form)
As described above, in the present embodiment, the lens driving mechanism 20 is configured by the lens driving coil 22 and the driving magnet 24, and the shake correction mechanism 21 is configured by the vibration correcting coil 23 and the driving magnet 24. Yes. That is, in this embodiment, a magnetic circuit for moving the lens in the optical axis direction and a magnetic circuit for correcting shake are formed by the common drive magnet 24.

  Therefore, in this embodiment, a lens driving magnet that forms a magnetic circuit for moving the lens in the optical axis direction and a shake correction magnet that forms a magnetic circuit for correcting shake are separately provided. Compared to the case, the number of parts can be reduced. In general, since the minimum magnet thickness required to secure a predetermined magnetic flux density is determined, when the lens driving magnet and the shake correction magnet are provided separately, The sum of the thickness of the lens driving magnet and the thickness of the shake correction magnet is increased. In this embodiment, however, the driving magnet is compared with the sum of the thickness of the lens driving magnet and the thickness of the shake correction magnet. The thickness of 24 can be reduced. Therefore, in this embodiment, it is possible to reduce the size of the photographing optical device 1.

  Further, in this embodiment, since the thickness of the driving magnet 24 can be reduced compared to the sum of the thickness of the lens driving magnet and the thickness of the shake correction magnet, the driving swings with the movable module 2. The weight of the working magnet 24 can be reduced. In particular, in this embodiment, the cover member 10 is formed of a resin material, and the movable module 2 can be reduced in weight compared to the case where the cover member 10 is formed of a magnetic material such as metal. Therefore, in this embodiment, it becomes possible to improve the responsiveness of the movable module 2 during shake correction.

  In this embodiment, a driving magnet 24 formed in a substantially rectangular flat plate shape is fixed to each of the four side surfaces constituting the cylindrical portion 10 b of the cover member 10. Therefore, the lens can be moved in the optical axis direction and the shake can be corrected using the substantially flat driving magnet 24 having a relatively simple shape.

  In this embodiment, the first facing surface 24c of the driving magnet 24 is magnetized so that two different magnetic poles overlap in the optical axis direction. Therefore, the density of the magnetic flux passing through the lens driving coil 22 can be increased as compared with the case where the first facing surface 24c is magnetized to a single pole. Therefore, in this embodiment, the driving force of the lens driving mechanism 20 can be increased. In the present embodiment, the second opposing surface 24d of the drive magnet 24 is magnetized so that two different magnetic poles overlap in the optical axis direction, so that the two long side portions 23a of the shake correction coil 23 are By using both, it is possible to obtain a driving force for correcting the shake. Therefore, the driving force of the shake correction mechanism 21 can be increased.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, the driving magnet 24 is fixed to each of the four side surfaces constituting the cylindrical portion 10b of the cover member 10. In addition to this, for example, the driving magnet 24 may be fixed to two side surfaces, one of the front and rear side surfaces of the cylindrical portion 10b and one of the left and right side surfaces. That is, the driving magnet 24 may be fixed to two side surfaces of the cylindrical portion 10b that are orthogonal to each other. In this case, for example, two shake correction coils 23 are fixed to the inner surface of the cylindrical portion 17 b of the case body 17 so as to face the drive magnet 24. Even in this case, the same effect as that of the above-described embodiment can be obtained. In addition, the drive magnet 24 may be fixed to each of three side surfaces of the four side surfaces constituting the cylindrical portion 10b.

  In the embodiment described above, the driving magnet 24 is fixed to each of the four side surfaces constituting the cylindrical portion 10b. In addition to this, for example, as shown in FIG. 5, a driving magnet 34 formed in a columnar shape may be fixed to each of the four corners of the cylindrical portion 10 b. In this case, for example, the sleeve 8 is formed in a substantially cylindrical shape, and a lens driving coil 32 wound in a cylindrical shape is fixed to the outer peripheral surface of the sleeve 8. Further, shake correction coils 33 formed by bending the above-described shake correction coil 23 into a substantially L shape are fixed to the insides of the four corners of the cylindrical portion 17b of the case body 17, respectively.

  The driving magnet 34 includes a first facing surface 34 c formed of an arcuate curved surface that faces the outer peripheral surface of the lens driving coil 32, and two planes that face the inner surface of the shake correction coil 33. A second facing surface 34d is formed, and the driving magnet 34 is magnetized so that the first facing surface 34c and the second facing surface 34d have different magnetic poles. Even in this case, substantially the same effect as the above-described embodiment can be obtained. In this case, the drive magnets 34 are disposed at the four corners of the cylindrical portion 10b that is likely to become a dead space, and the shake correction coils 33 are disposed at the four corners of the cylindrical portion 17b that are likely to be a dead space. The optical device 1 can be further downsized.

  In the example shown in FIG. 5, the driving magnets 34 may be fixed at two locations adjacent in the circumferential direction among the four corners of the cylindrical portion 10 b. In addition, the driving magnet 34 may be fixed to three of the four corners of the cylindrical portion 10b.

  In the embodiment described above, the lens driving coil 22 is wound in a substantially square cylindrical shape, but the lens driving coil 22 is wound in a flat, substantially rectangular shape, like the shake correction coil 23. May be formed. In this case, the lens driving coil 22 is fixed to the outer peripheral surface of the sleeve 8 so that the thickness direction of the lens driving coil 22 matches the thickness direction of the cylindrical portion 10b. The side surface and the outer surface of the lens driving coil 22 face each other with a predetermined gap.

  In the embodiment described above, the side surface of the driving magnet 24 is magnetized so that two different magnetic poles overlap in the optical axis direction, but the side surface of the driving magnet 24 may be magnetized to a single pole. In this case, one lens driving coil 22 is fixed to the outer peripheral side of the sleeve 8. In the embodiment described above, the drive magnet 24 is constituted by two magnet pieces, ie, the first magnet piece 24a and the second magnet piece 24b, but the drive magnet 24 is constituted by one magnet piece. It may be configured.

  In the embodiment described above, the photographing optical device 1 is formed so as to have a substantially square shape when viewed from the optical axis direction. However, the photographing optical device 1 is formed when viewed from the optical axis direction. You may form so that a shape may become a substantially rectangular shape. The photographing optical device 1 may be formed so that the shape when viewed from the optical axis direction is another polygonal shape, and the shape when viewed from the optical axis direction is a circular shape or an elliptical shape. It may be formed as follows. Similarly, the movable module 2 may be formed so that the shape when viewed from the optical axis direction is substantially rectangular. Further, the movable module 2 may be formed such that the shape when viewed from the optical axis direction is another polygonal shape, or the shape when viewed from the optical axis direction is a circular shape or an elliptical shape. May be formed.

  In the above-described embodiment, the lens driving mechanism 20 is configured by the lens driving coil 22 and the driving magnet 24. However, the lens driving mechanism 20 is an auxiliary driving coil other than the lens driving coil 22. Alternatively, an auxiliary driving magnet other than the driving magnet 24 may be provided. Similarly, in the above-described embodiment, the shake correction mechanism 21 is configured by the shake correction coil 23 and the drive magnet 24. However, the shake correction mechanism 21 is used for auxiliary driving other than the shake correction coil 23. An auxiliary driving magnet other than the coil and the driving magnet 24 may be provided.

  In the above-described embodiment, a magnetic sensor may be attached to the support 3 and the relative position of the movable module 2 with respect to the support 3 may be detected by the magnetic sensor and the driving magnet 24.

DESCRIPTION OF SYMBOLS 1 Optical device for imaging | photography 2 Movable module 3 Support body 5 Movable body 6 Holding body 10 Cover member (magnet holding member)
20 lens drive mechanism 21 shake correction mechanism 22, 32 lens drive coil 23, 33 shake correction coil 24, 34 drive magnet 24c, 34c first facing surface 24d, 34d second facing surface L optical axis Z optical axis direction

Claims (6)

A movable body that holds a lens and is movable in the optical axis direction of the lens, a movable module that has a holding body that holds the movable body so as to be movable in the optical axis direction, and a support that supports the movable module in a swingable manner A body, a lens driving coil attached to the movable body, a shake correction coil attached to the support, a first facing surface facing the lens driving coil, and a second facing the shake correction coil. A driving magnet attached to the holding body having an opposing surface,
The lens driving coil and the driving magnet constitute at least a part of a lens driving mechanism for driving the movable body in the optical axis direction with respect to the holding body,
The shake correction coil and the drive magnet constitute at least a part of a shake correction mechanism for correcting the shake by swinging the movable module with respect to the support. Optical device for photographing. The holding body includes a substantially cylindrical magnet holding member that constitutes at least a part of the outer peripheral surface of the movable module and holds the driving magnet.
The lens driving coil is disposed on the inner peripheral side of the magnet holding member,
The shake correction coil is disposed on the outer peripheral side of the magnet holding member,
The drive magnet is fixed to the magnet holding member such that the first opposing surface faces the inner peripheral side of the magnet holding member and the second opposing surface faces the outer peripheral side of the magnet holding member. The photographing optical device according to claim 1. The magnet holding member is formed in a substantially square tube shape whose shape when viewed from the optical axis direction is a substantially square shape or a substantially rectangular shape,
The imaging optical according to claim 2, wherein the driving magnet is formed in a substantially flat plate shape and is fixed to at least two of the four side surfaces of the magnet holding member that are orthogonal to each other. apparatus. The magnet holding member is formed in a substantially square tube shape whose shape when viewed from the optical axis direction is a substantially square shape or a substantially rectangular shape,
The photographic optical device according to claim 2, wherein the driving magnet is fixed to at least two adjacent corners of the four corners of the magnet holding member.   5. The photographing optical device according to claim 2, wherein the magnet holding member is made of a nonmagnetic material.   6. The drive magnet is magnetized so that two different magnetic poles are overlapped in the optical axis direction on the first facing surface and the second facing surface. The optical apparatus for photography as described.

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