JP6190713B2 - Optical device for photography - Google Patents

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 Conventionally, a photographing optical device having a shake correction function that corrects shake by swinging a movable module having a lens and an image sensor is known (see, for example, Patent Document 1). The imaging optical device described in Patent Document 1 includes a movable module, a support that holds the movable module in a swingable manner, a leaf spring that connects the movable module and the support, and the movable module that swings with respect to the support. And a rocking mechanism to be moved.

  In the photographing optical device described in Patent Document 1, the movable module is formed in a substantially quadrangular prism shape having a substantially square shape when viewed from the optical axis direction of the lens. The support body includes a case body that constitutes a side surface of the photographing optical device in a direction orthogonal to the optical axis direction. The case body is formed in a substantially rectangular tube shape whose outer shape when viewed from the optical axis direction is a substantially square shape, and is disposed so as to surround the movable module from the outer peripheral side. The swing mechanism includes a driving magnet fixed to the side surface of the movable module, and a driving coil fixed to the inner peripheral surface of the case body so as to face the driving magnet.

JP 2012-37593 A

  In the photographing optical device described in Patent Document 1, a driving magnet is fixed to a side surface of a movable module having a substantially square shape when viewed from the optical axis direction. In this photographing optical device, a driving coil is fixed to the inner peripheral surface of the case body formed in a substantially rectangular tube shape so as to face the driving magnet. Therefore, in this photographing optical device, in the direction orthogonal to the optical axis direction, a gap for preventing interference between the driving magnet and the driving coil between the side surface of the movable module and the inner peripheral surface of the case body. In addition, it is necessary to secure a distance corresponding to the sum of the thickness of the driving magnet and the thickness of the driving coil, and the apparatus becomes large in the direction orthogonal to the optical axis direction.

  Therefore, an object of the present invention is to provide a photographing optical device that can be miniaturized in a direction orthogonal to the optical axis direction.

  In order to solve the above-described problems, a photographic optical device according to the present invention includes a movable module having a lens and an imaging element, a support that holds the movable module in a swingable manner, and a spring member that connects the movable module and the support. And a swinging mechanism for swinging the movable module with respect to the support, the swinging mechanism being a driving magnet fixed to either the movable module or the support, and any of the movable module or the support Or a driving coil fixed to the other, and the support includes a cylindrical case body disposed so as to surround a side surface of the movable module in a direction orthogonal to the optical axis direction of the lens. A first module part and a second module part, which are formed in a substantially cylindrical shape, have a lens fixed on the inner peripheral side and have a size corresponding to the outer diameter of the lens, The coil portion is smaller than the first module portion in a direction orthogonal to the optical axis direction, and either the driving magnet or the driving coil is fixed to the movable module on the outer peripheral side of the second module portion. The other of the driving magnet and the driving coil is fixed to the inner peripheral surface of the case body so as to face either the driving magnet or the driving coil, and the spring member is fixed to the movable module. The movable-side fixed portion includes a movable-side fixed portion, a support-side fixed portion fixed to the support, and a plurality of arms that connect the movable-side fixed portion and the support-side fixed portion. The movable-side fixed portion is viewed from the optical axis direction. Sometimes, it is arranged on the inner peripheral side with respect to the support side fixing part, and is arranged on the inner side of the outer peripheral surface of the first module part in the direction orthogonal to the optical axis direction.

  In the photographic optical device of the present invention, the movable module includes a first module part and a second module part that are fixed to the inner peripheral side and are formed in a size corresponding to the outer diameter of the lens. In the present invention, either the driving magnet or the driving coil is fixed to the movable module on the outer peripheral side of the second module portion that is smaller than the first module portion in the direction orthogonal to the optical axis direction. ing. Further, in the present invention, the movable side fixing portion disposed on the inner peripheral side of the support side fixing portion of the spring member has the first module portion in a direction orthogonal to the optical axis direction when viewed from the optical axis direction. It arrange | positions inside an outer peripheral surface. Therefore, in the present invention, in the direction orthogonal to the optical axis direction, at least the thickness in the direction orthogonal to the optical axis direction of the driving magnet or the driving coil fixed to the movable module, or fixed to the movable module. The distance between the side surface of the movable module and the inner peripheral surface of the case body can be shortened by the thickness in the direction perpendicular to the optical axis direction of a part of the driving magnet or the driving coil. Therefore, according to the present invention, it is possible to reduce the size of the photographing optical device in a direction orthogonal to the optical axis direction.

  In the present invention, for example, the photographing optical device is formed in a substantially quadrangular prism shape whose shape when viewed from the optical axis direction is a substantially square shape, and the length of the photographing optical device in the optical axis direction is the optical axis direction. When viewed from the side, the length is longer than the length of one side of the photographic optical device. In this case, for example, it becomes easy to mount the photographing optical device on a glasses-type wearable device.

  In the present invention, for example, the first module part is formed such that the outer shape when viewed from the optical axis direction is substantially rectangular or substantially square, and the second module part is when viewed from the optical axis direction. The outer shape is formed in a substantially circular shape. In the present invention, if one side in the optical axis direction is the subject side and the other side in the optical axis direction is the non-subject side, for example, the second module unit moves from the subject side end of the first module unit to the subject side. It is formed to protrude.

  In the present invention, if one side in the optical axis direction is the subject side and the other side in the optical axis direction is the non-subject side, the photographic optical device is electrically connected to the image sensor and the anti-subject side of the movable module A flexible printed circuit board that is pulled out from the part, the support includes a base plate that constitutes an end surface on the side opposite to the subject of the optical device for photographing, and the base plate has a protruding portion that protrudes toward the subject side; The case body constitutes a side surface of the photographing optical device in a direction orthogonal to the optical axis direction, and the protruding portion is inside the outer peripheral surface of the case body in the direction orthogonal to the optical axis direction when viewed from the optical axis direction. The flexible printed circuit board is disposed on the inner side of the outer peripheral surface of the case body in the direction perpendicular to the optical axis direction when viewed from the optical axis direction so that the flexible printed circuit board is drawn out to the opposite object side along the protruding portion. In It is preferably fixed to the projecting portion so as to location. If comprised in this way, even if the flexible printed circuit board is pulled out of the support body, it becomes possible to prevent a part of the flexible printed circuit board from protruding from the outer peripheral surface of the case body to the outer peripheral side. . Therefore, it is possible to further reduce the size of the photographing optical device in the direction orthogonal to the optical axis direction.

  In the present invention, for example, the driving magnet is fixed to the movable module, and the driving coil is fixed to the support. In this case, at least the thickness in the direction perpendicular to the optical axis direction of the drive magnet, or the thickness in the direction perpendicular to the optical axis direction of a part of the drive magnet, It becomes possible to shorten the distance between the inner peripheral surface. In the present invention, the driving coil may be fixed to the movable module, and the driving magnet may be fixed to the support. In this case, at least the thickness in the direction perpendicular to the optical axis direction of the drive coil, or the thickness in the direction perpendicular to the optical axis direction of a part of the drive coil, the side surface of the movable module and the case body It becomes possible to shorten the distance between the inner peripheral surface.

  In the present invention, the surface of the drive magnet facing the drive coil is preferably magnetized to a single pole. If comprised in this way, it will become possible to shorten the length of the drive magnet in an optical axis direction compared with the case where the opposing surface with the drive coil of a drive magnet is magnetized by 2 poles. .

  In the present invention, the movable module is formed so that the shape when viewed from the optical axis direction is a substantially rectangular shape or a substantially square shape, and the oscillating mechanism has four sides of the movable module when viewed from the optical axis direction. , And four driving magnets arranged along the optical axis, where one side in the optical axis direction is the subject side and the other side in the optical axis direction is the non-subject side, the subject of the four driving magnets It is preferable that a metal member formed in a substantially rectangular or substantially square frame shape is fixed to the end face on the side and the end face on the opposite object side. If comprised in this way, it will become possible to handle four drive magnets collectively at the time of the assembly of the imaging optical device. Therefore, it becomes easy to handle the four drive magnets when assembling the photographic optical device.

  In the present invention, for example, the photographing optical device includes a fulcrum portion that serves as a fulcrum for the swing of the movable module with respect to the support, and the support includes a first spring fixing member to which the support-side fixing portion is fixed. The module includes a second spring fixing member to which the movable side fixing portion is fixed. When the one side in the optical axis direction is the subject side and the other side in the optical axis direction is the anti-subject side, the case body is a photographic optical The first spring fixing member is provided with an end surface portion that constitutes an object-side end surface of the device, and the first spring fixing member is fixed to the surface of the end surface portion on the side opposite to the subject, and protrudes from the portion to be fixed toward the anti-subject side and is supported. And a second spring fixing member disposed closer to the subject side than the first module portion and the second module portion, and the fulcrum portion closer to the subject side than the movable module. Arranged, the movable side fixed part is Is fixed to an end face on the object side of the second spring fixing member is disposed on the object side than the supporting side fixing part. In this case, the movable module can be biased toward the fulcrum by the spring member.

  In the present invention, for example, the movable module is a fixed focus type camera module in which the distance between the imaging element and the lens is fixed.

  As described above, according to the present invention, it is possible to reduce the size of the photographing optical device in a direction orthogonal to the optical axis direction.

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 perspective view of a state where a driving magnet is attached to the lens holder shown in FIG. 3. FIG. 4 is a perspective view of the spring member, the first spring fixing member, and the second spring fixing member shown in FIG. 3.

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

(Configuration 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. FIG. 4 is a perspective view of a state in which the driving magnet 29 is attached to the lens holder 10 shown in FIG. FIG. 5 is a perspective view of the leaf spring 6 and the spring fixing members 17 and 35 shown in FIG. In the following description, as shown in FIG. 1 and the like, 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-back direction, and the Z direction is the up-down direction. . Further, the X1 direction side in FIG. 1 or the like is the “right” side, the X2 direction side is the “left” side, the Z1 direction side is the “upper” side, and the Z2 direction side is the “lower” side. A plane composed of the X direction and the Y direction is an XY plane, a plane composed of the Y direction and the Z direction is a YZ plane, and a plane composed of the Z direction and the X direction is a ZX plane.

  The photographing optical device 1 according to the present embodiment is a small camera mounted on, for example, a glasses-type wearable device, and has a shake correction function. The photographing optical device 1 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 ZX plane or the YZ plane. In this embodiment, the length W1 (see FIG. 1) of the photographic optical device 1 in the optical axis direction is the length W2 (see FIG. 1) of one side of the photographic optical device 1 when viewed from the optical axis direction. Longer than.

  The photographing optical device 1 includes a movable module 4 having a photographing lens and an image sensor, and a support 5 that holds the movable module 4 so as to be swingable. The movable module 4 and the support 5 are connected by a leaf spring 6 as a spring member. That is, the movable module 4 is swingably held on the support 5 via the leaf spring 6. The photographing optical device 1 also includes a swing mechanism 7 (see FIG. 2) for correcting the shake by swinging the movable module 4 with respect to the support 5.

  In this embodiment, the vertical direction substantially coincides with the optical axis direction of the movable module 4 when the movable module 4 is not swinging. In this embodiment, an image sensor is mounted on the lower end side of the movable module 4, 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) that is one side in the optical axis direction, and the lower side (Z2 direction side) is the opposite side that is the other side in the optical axis direction. Side (image sensor side, image side).

  The movable module 4 is a fixed focus type camera module in which the distance between the imaging element and the lens is fixed. The movable module 4 includes a lens holder 10 to which a plurality of lenses are fixed, and a substrate 11 on which an imaging element is mounted. The lens holder 10 is made of a resin material. The lens holder 10 includes a first holder portion 10a and a second holder portion 10b that are formed in a substantially cylindrical shape. The 1st holder part 10a of this form is a 1st module part, and the 2nd holder part 10b is a 2nd module part.

  The first holder part 10a has an approximately circular inner periphery when viewed from the optical axis direction, and an approximately square outer periphery of the first holder part 10a when viewed from the optical axis direction. It is formed in a cylindrical shape. That is, the first holder portion 10a is formed so that the outer shape when viewed from the optical axis direction is substantially square. The 2nd holder part 10b is formed in the substantially cylindrical shape from which the inner periphery and outer periphery of the 2nd holder part 10b become substantially circular shape seeing from an optical axis direction. That is, the second holder portion 10b is formed so that the outer shape when viewed from the optical axis direction is substantially circular.

  As shown in FIG. 3, the outer diameter of the second holder portion 10b is smaller than the length of one side of the first holder portion 10a when viewed from the optical axis direction. That is, the 2nd holder part 10b is smaller than the 1st holder part 10a in the front-back, left-right direction. The first holder portion 10 a constitutes the lower end side portion of the lens holder 10, and the second holder portion 10 b constitutes the upper end side portion of the lens holder 10. That is, the second holder part 10b is formed to protrude upward from the upper end of the first holder part 10a. The first holder part 10a and the second holder part 10b are arranged so that their centers coincide when viewed from the optical axis direction. Therefore, the shape of the lens holder 10 when viewed from the optical axis direction (that is, the shape of the movable module 4 when viewed from the optical axis direction) is substantially square. Moreover, the upper end surface of the 1st holder part 10a is formed in the outer peripheral side of the 2nd holder part 10b. The upper end surface is formed in an annular shape substantially parallel to the XY plane.

  As described above, a plurality of lenses are fixed to the lens holder 10. In this embodiment, the outer diameter of the lens arranged on the lower side (on the subject side) is larger than the outer diameter of the lens arranged on the upper side (subject side). A lens having a relatively large outer diameter is fixed to the inner peripheral side of the first holder portion 10 a constituting the lower end side portion of the lens holder 10. The 1st holder part 10a is formed in the magnitude | size according to the outer diameter of the lens fixed to the inner peripheral side. That is, the first holder portion 10a is formed in a size (minimum required size) required to fix a lens having a relatively large outer diameter on the inner peripheral side. . A lens having a relatively small outer diameter is fixed to the inner peripheral side of the second holder portion 10b constituting the upper end side portion of the lens holder 10. The 2nd holder part 10b is formed in the magnitude | size according to the outer diameter of the lens fixed to the inner peripheral side. In other words, the second holder portion 10b is formed in a size (minimum required size) that is minimum required to fix a lens having a relatively small outer diameter on the inner peripheral side.

  The image sensor is mounted on the substrate 11. The substrate 11 is a rigid substrate. The substrate 11 is fixed to the lower surface of the first holder portion 10 a and constitutes the lower end side portion of the movable module 4. A flexible printed circuit board (FPC) 12 is connected to the substrate 11. That is, the FPC 12 is pulled out from the lower end side portion of the movable module 4. The FPC 12 is electrically connected to the image sensor via a wiring pattern on the substrate 11. A fulcrum plate 13 is fixed to the lower surface of the substrate 11. A substantially hemispherical fulcrum part 13 a protruding downward is formed at the center of the fulcrum plate 13. The fulcrum part 13a is formed such that the optical axis L passes through the tip (lower end) of the fulcrum part 13a.

  The support body 5 includes a case body 15 that forms four front, back, left, and right side surfaces of the support body 5, a base plate 16 that forms a lower end side portion of the support body 5, and a first portion to which a part of the leaf spring 6 is fixed. And a spring fixing member 17 as a spring fixing member. In this embodiment, the case body 15 constitutes the front, back, left and right side surfaces of the photographing optical device 1, and the base plate 16 constitutes the lower end surface of the photographing optical device 1.

  The case body 15 is made of, for example, a nonmagnetic metal material. Moreover, the case body 15 is formed in the substantially bottomed square cylinder shape which has the four bottom parts 15a formed in flat form, and the cylinder part 15b formed in a substantially square cylinder shape. The cylindrical portion 15b has a substantially square frame shape when viewed from the optical axis direction. The four bottom portions 15 a are connected to the upper end of the cylindrical portion 15 b and constitute the upper end surface of the case body 15. Further, the four bottom portions 15 a constitute the upper end surface of the photographing optical device 1. Each of the four bottom portions 15a is disposed at each of the four corners of the cylindrical portion 15b, and a through hole 15c penetrating in the vertical direction is formed on the upper surface of the case body 15. The bottom 15a is formed in a substantially triangular shape. The bottom portion 15a of the present embodiment is an end surface portion that constitutes an object-side end surface (upper surface) of the photographing optical device 1.

  The case body 15 is disposed so that the axial direction of the cylindrical portion 15b and the vertical direction substantially coincide with each other. Further, the case body 15 is arranged so that the cylindrical portion 15b covers the movable module 4 and the swing mechanism 7 from the outer peripheral side. That is, the cylindrical portion 15b of the case body 15 is disposed so as to surround the side surface of the movable module 4 in the front-rear and left-right directions.

  The base plate 16 is formed by bending a substantially rectangular metal plate into an L shape, and protrudes downward from the right end of the bottom portion 16a and a substantially square bottom portion 16a fixed to the lower end of the cylindrical portion 15b. It is comprised from the protrusion part 16b. The bottom portion 16 a is disposed so as to be substantially parallel to the XY plane, and constitutes the lower end surface of the photographing optical device 1. The protrusion 16b is disposed so as to be substantially parallel to the YZ plane.

  In the front-rear direction, the front and rear end surfaces of the bottom portion 16a coincide with the front and rear side surfaces of the cylindrical portion 15b. In the left-right direction, the left end surface of the bottom portion 16a coincides with the left side surface of the cylindrical portion 15b. On the other hand, in the left-right direction, the right end surface of the bottom portion 16a is disposed on the left side of the right side surface of the cylindrical portion 15b. In the left-right direction, the right side surface of the protruding portion 16b is disposed on the left side of the right side surface of the cylindrical portion 15b. That is, the protrusion 16b is disposed on the inner side of the outer peripheral surface of the case body 15 in the left-right direction when viewed from the optical axis direction. In the left-right direction, a gap for pulling out the FPC 12 is formed between the right side surface portion 15d constituting the right side surface of the cylindrical portion 15b and the protruding portion 16b.

  A support member 19 is fixed to the center of the bottom portion 16a. The support member 19 is fixed to the bottom portion 16a so as to protrude upward from the bottom portion 16a. As shown in FIG. 2, an abutting surface with which the tip of the fulcrum part 13 a of the fulcrum plate 13 abuts is formed at the upper end of the support member 19. This contact surface is formed substantially parallel to the XY plane. In the present embodiment, a fulcrum portion 20 serving as a fulcrum for swinging the movable module 4 with respect to the support 5 is configured by the contact surface formed on the support member 19 and the fulcrum portion 13a. The fulcrum part 20 is disposed below the movable module 4.

  As described above, the FPC 12 is pulled out from the lower end side portion of the movable module 4. Further, the FPC 12 is drawn around at the lower end side inside the support body 5 and pulled out to the lower side of the support body 5. Specifically, as shown in FIG. 2, the FPC 12 is pulled out from the right end of the substrate 11, folded back to 180 ° and drawn to the left side, and then folded back to 180 ° to the right side. Has been routed. Further, the FPC 12 drawn to the right side is bent by 90 ° and drawn to the lower side of the support 5 from the gap between the right side surface portion 15d and the protruding portion 16b. The folded portions of the FPC 12 that are folded at 180 ° at the left side portion inside the support 5 are fixed to each other via the spacer 21. The portion of the FPC 12 immediately before the portion that is bent at 90 ° in the right side portion inside the support 5 is fixed to the upper surface of the bottom portion 16 a via the spacer 22.

  The portion of the FPC 12 that is pulled out to the lower side of the support 5 is fixed to the right side surface of the protruding portion 16b. Specifically, the reinforcing plate 23 is fixed to the left side surface of the portion of the FPC 12 that is pulled out to the lower side of the support 5, and the reinforcing plate 23 is fixed to the right side surface of the protruding portion 16 b. Therefore, the FPC 12 is drawn downward along the protruding portion 16b. That is, the FPC 12 is fixed to the protruding portion 16b via the reinforcing plate 23 so as to be drawn out downward along the protruding portion 16b. Further, the right side surface of the portion of the FPC 12 that is pulled out to the lower side of the support body 5 is disposed on the left side of the right side surface of the cylindrical portion 15b in the left-right direction. In other words, the FPC 12 is fixed to the protruding portion 16b via the reinforcing plate 23 so as to be disposed inside the outer peripheral surface of the case body 15 in the left-right direction when viewed from the optical axis direction. In addition, the board | substrate 24 which is a rigid board | substrate is connected to the lower end of FPC12 pulled out to the lower side of the support body 5. FIG.

  The spring fixing member 17 is formed by bending a flat plate member into a predetermined shape. The spring fixing member 17 includes a fixed portion 17a that is fixed to the lower surface of the bottom portion 15a of the case body 15, and a spring fixing portion 17b that protrudes downward from the fixed portion 17a. The fixed portion 17a is formed so that the outer shape when viewed from the optical axis direction is substantially square. Further, a circular through hole is formed at the center of the fixed portion 17a, and the fixed portion 17a is formed in a substantially square frame shape.

  The spring fixing portion 17b is formed at each of the four corners of the fixed portion 17a. That is, the spring fixing member 17 is formed with four spring fixing portions 17b. The spring fixing portion 17b is formed so as to extend downward from the four corners of the fixed portion 17a, then bend at 90 °, and extend radially outward of the lens in the radial direction. The lower end surface of the spring fixing portion 17b is substantially parallel to the XY plane. A support side fixing portion 6b, which will be described later, constituting the leaf spring 6 is fixed to the lower end surface of the spring fixing portion 17b.

  The swing mechanism 7 includes a sheet-like coil 28 that integrally includes a coil portion 27 (see FIG. 2) as a drive coil, and a drive magnet 29. The swing mechanism 7 of this embodiment includes four sheet coils 28 and four drive magnets 29.

  The sheet-like coil 28 is a flexible printed coil (FP coil) configured by forming a coil portion 27 made of fine copper wiring on a substrate 30 (see FIG. 2). The coil portion 27 is formed in a substantially rectangular frame shape, and is arranged so that the long side portions thereof overlap in the vertical direction. Further, the surface of the coil portion 27 is covered with an insulating film. The sheet-like coil 28 is disposed inside each of the four side surfaces constituting the cylindrical portion 15b of the case body 15.

  The four sheet-like coils 28 are electrically connected to the relay FPC 31. The FPC 31 is arranged on the inner peripheral side of the cylindrical portion 15b in a state where the FPC 31 is bent into a substantially square cylindrical shape. The four sheet-like coils 28 are fixed to the inner peripheral surface of the FPC 31 bent into a substantially rectangular tube shape, and the outer peripheral surface of the FPC 31 is fixed to the inner peripheral surface of the cylindrical portion 15b. That is, the four sheet-like coils 28 are fixed to the inner peripheral surface of the cylindrical portion 15b via the FPC 31. The FPC 31 is drawn downward from the gap between the right side surface portion 15 d of the cylindrical portion 15 b and the protruding portion 16 b of the base plate 16 and connected to the substrate 24.

  The drive magnet 29 is a neodymium magnet mainly composed of neodymium, iron, and boron. The drive magnet 29 is formed in an elongated rectangular parallelepiped shape. The four drive magnets 29 are fixed with two metal members 32 and 33 that are formed in a flat plate shape and in a substantially square frame shape. Specifically, the upper surfaces of the four sides of the metal member 32 formed in a substantially square frame shape are fixed to the lower surfaces of the four drive magnets 29, and the metal member 33 formed in a substantially square frame shape. The lower surfaces of the four sides are fixed to the upper surfaces of the four drive magnets 29. The metal members 32 and 33 are, for example, stainless steel plates.

  As shown in FIG. 4, the lower surface of the metal member 32 is fixed to the upper end surface of the first holder portion 10 a formed on the outer peripheral side of the second holder portion 10 b of the lens holder 10. That is, the four drive magnets 29 are fixed to the movable module 4 via the metal member 32 on the outer peripheral side of the second holder portion 10b. In addition, the four drive magnets 29 formed in an elongated rectangular parallelepiped shape are arranged along the four sides of the movable module 4 formed in a substantially square shape when viewed from the optical axis direction. It arrange | positions so that the outer peripheral surface of 10b may be enclosed. That is, of the four drive magnets 29, two drive magnets 29 are outside the second holder portion 10b in the front-rear direction, and in the longitudinal direction and the left-right direction of the two drive magnets 29. The remaining two drive magnets 29 are arranged outside the second holder portion 10b in the left-right direction, and in the longitudinal direction and the front-rear direction of the remaining two drive magnets 29. Are arranged to match.

  In this embodiment, as shown in FIGS. 2 and 4, the side surface of the first holder portion 10a in the left-right direction, the outer peripheral ends of the metal members 32, 33 in the left-right direction, and the outer surface of the driving magnet 29 in the left-right direction Is almost the same. Further, the side surface of the first holder portion 10a in the front-rear direction, the outer peripheral ends of the metal members 32, 33 in the front-rear direction, and the outer surface of the driving magnet 29 in the front-rear direction substantially coincide. Furthermore, the inner peripheral ends of the metal members 32 and 33 in the left-right direction and the inner surface of the drive magnet 29 in the left-right direction substantially coincide with each other, and the inner peripheral ends of the metal members 32 and 33 in the front-rear direction and the drive in the front-rear direction. The inner surface of the working magnet 29 is substantially coincident. Further, the sum of the thickness of the driving magnet 29 and the thickness of the metal members 32 and 33 in the vertical direction is slightly larger than the thickness of the second holder portion 10b in the vertical direction. Therefore, as shown in FIG. 2, the upper surface of the metal member 33 is disposed above the upper end surface of the second holder portion 10b.

  The driving magnet 29 is disposed so that the longitudinal direction thereof coincides with the left-right direction, and the driving magnet 29 is disposed such that the longitudinal direction of the driving magnet 29 coincides with the longitudinal direction. The outer side surface of the drive magnet 29 in the left-right direction is opposed to the long side portion disposed on the upper side of the two long side portions of the coil portion 27 via a predetermined gap. The driving magnet 29 arranged so that the longitudinal direction of the driving magnet 29 coincides with the left-right direction is such that the magnetic pole formed on the front side surface of the driving magnet 29 is different from the magnetic pole formed on the rear side surface. The drive magnet 29 that is magnetized and arranged so that the longitudinal direction of the drive magnet 29 coincides with the front-rear direction is composed of a magnetic pole formed on the right side surface of the drive magnet 29 and a magnetic pole formed on the left side surface. Are magnetized differently. Further, the surface of the drive magnet 29 facing the coil portion 27 is magnetized to a single pole.

  A spring fixing member 35 as a second spring fixing member to which a part of the plate spring 6 is fixed is fixed on the upper surface of the metal member 33. That is, the spring fixing member 35 is disposed above the first holder part 10a and the second holder part 10b. The spring fixing member 35 is formed in a flat and substantially rectangular tube shape having a substantially square frame shape when viewed from the optical axis direction. The outer shape of the spring fixing member 35 is smaller than the outer shape of the metal member 33. In this embodiment, the shape of the inner peripheral end of the spring fixing member 35 and the shape of the inner peripheral end of the metal member 33 are substantially equal, and the inner peripheral end of the spring fixing member 35 and the inner peripheral end of the metal member 33 are the same. A spring fixing member 35 is fixed to the upper surface of the metal member 33 so as to substantially match. On the upper surface of the spring fixing member 35, a movable side fixing portion 6a, which will be described later, constituting the leaf spring 6 is fixed. In addition, the spring fixing member 35 of this embodiment constitutes a part of the movable module 4.

  The leaf spring 6 is made of a metal material. The leaf spring 6 includes a movable side fixed portion 6a fixed to the movable module 4, four support side fixed portions 6b fixed to the support body 5, a movable side fixed portion 6a and a support side fixed portion 6b. And four arm portions 6c to be connected.

  The movable side fixing portion 6a is formed in a frame shape. Specifically, the movable side fixed portion 6a is formed in a frame shape having a substantially square shape when viewed from the optical axis direction. The support-side fixing portion 6b is formed in a substantially triangular small piece shape. The four support side fixing portions 6b are arranged on the outer peripheral side with respect to the movable side fixing portion 6a. Specifically, each of the four support side fixing portions 6b is disposed on the outer peripheral side of each of the four corners of the movable side fixing portion 6a formed in a substantially square frame shape. That is, the movable side fixing part 6a is arranged on the inner peripheral side with respect to the four support side fixing parts 6b. The arm part 6c is formed in a substantially L shape. One end of the arm portion 6c is connected to the support side fixing portion 6b, and the other end of the arm portion 6c is connected to the outer peripheral end of the movable side fixing portion 6a.

  The movable side fixing portion 6a is fixed to the upper surface (subject side surface) of the spring fixing member 35. In this embodiment, the shape of the inner peripheral end of the movable side fixing portion 6a and the shape of the inner peripheral end of the spring fixing member 35 are substantially equal, and the inner peripheral end of the movable side fixing portion 6a and the spring fixing member 35 are The movable side fixing portion 6a is fixed to the upper surface of the spring fixing member 35 so that the inner peripheral end substantially coincides with the inner peripheral end. Further, in this embodiment, as shown in FIG. 2, the outer peripheral end of the movable side fixing portion 6a and the outer peripheral end of the spring fixing member 35 are substantially coincident, and the movable side fixing portion 6a is viewed from the optical axis direction. Sometimes, it is arrange | positioned inside the outer peripheral surface of the 1st holder part 10a in the front-back, left-right direction.

  Each of the four support side fixing portions 6 b is fixed to the lower surface of each of the four spring fixing portions 17 b of the spring fixing member 17. The four support side fixing portions 6b are arranged below the movable side fixing portion 6a. That is, the movable side fixing part 6a is disposed above the four support side fixing parts 6b. For this reason, the movable module 4 has a biasing force in a direction in which the contact surface of the support member 19 and the fulcrum portion 13a are in contact (that is, a biasing force that biases the movable module 4 downward). In this embodiment, the arm portion 6c bends with respect to the support side fixing portion 6b, so that the movable module 4 fixed to the movable side fixing portion 6a can swing.

  In the imaging optical device 1 configured as described above, when a change in the inclination of the imaging optical device 1 is detected by an angular velocity sensor (gyroscope) (not shown), based on the detection result of the angular velocity sensor, A current is supplied to the coil unit 27. When a current is supplied to the coil portion 27, the movable module 4 swings so that the optical axis L is tilted about the fulcrum portion 20, and the shake is corrected.

(Main effects of this form)
As described above, in this embodiment, the four drive magnets 29 are fixed to the movable module 4 on the outer peripheral side of the second holder portion 10b that is smaller than the first holder portion 10a in the front-rear and left-right directions. Yes. Further, in this embodiment, the side surface of the first holder portion 10a in the front-rear and left-right directions, the outer peripheral ends of the metal members 32 and 33 in the front-rear and left-right directions, and the outer surface of the driving magnet 29 in the front-rear left-right direction substantially coincide. Yes. Further, in this embodiment, the movable side fixed portion 6a of the leaf spring 6 is disposed on the inner side of the outer peripheral surface of the first holder portion 10a in the front-rear and left-right directions when viewed from the optical axis direction. Therefore, in this embodiment, the distance between the side surface of the movable module 4 and the inner peripheral surface of the case body 15 is shortened by the thickness of the driving magnet 29 in the front-rear direction or the left-right direction in the front-rear left-right direction. It becomes possible. Therefore, in this embodiment, it is possible to reduce the size of the photographic optical device 1 in the front-rear and left-right directions. As a result, the photographic optical device 1 can be easily mounted on a glasses-type wearable device or the like.

  In this embodiment, the FPC 12 is arranged so as to be drawn downward along the protruding portion 16b of the base plate 16 and on the inner side of the outer peripheral surface of the case body 15 in the left-right direction when viewed from the optical axis direction. In this way, it is fixed to the protruding portion 16b via the reinforcing plate 23. Therefore, in this embodiment, even if the FPC 12 is pulled out of the support body 5, it is possible to prevent a part of the FPC 12 from protruding from the outer peripheral surface of the case body 15 to the right side. In particular, in this embodiment, the portion of the FPC 12 immediately before the portion that is bent at 90 ° in the right portion inside the support 5 is fixed to the upper surface of the bottom portion 16a via the spacer 22, so that a part of the FPC 12 is It is possible to reliably prevent the case body 15 from protruding rightward from the outer peripheral surface. Therefore, in this embodiment, it is possible to further reduce the size of the photographing optical device 1 in the left-right direction.

  In this embodiment, the surface of the driving magnet 29 facing the coil portion 27 is magnetized to a single pole. Therefore, in this embodiment, it is possible to shorten the length of the driving magnet 29 in the optical axis direction as compared with the case where the surface facing the coil portion 27 of the driving magnet 29 is magnetized to two poles. become.

  In this embodiment, the metal member 32 is fixed to the lower surface of the four drive magnets 29, and the metal member 33 is fixed to the upper surface of the four drive magnets 29. For this reason, in this embodiment, it is possible to handle the four drive magnets 29 together when assembling the photographic optical device 1. Therefore, in this embodiment, the four drive magnets 29 can be easily handled when the photographing optical device 1 is assembled.

(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 side surface of the first holder portion 10a in the front / rear / left / right direction and the outer surface of the driving magnet 29 in the front / rear / left / right direction substantially coincide with each other. In addition, for example, the outer surface of the driving magnet 29 in the front / rear / left / right direction may protrude outward in the front / rear / left / right direction from the side surface of the first holder portion 10a in the front / rear / left / right direction. Even in this case, in the front-rear and left-right directions, the distance between the side surface of the movable module 4 and the inner peripheral surface of the case body 15 is equal to the thickness of a part of the drive magnet 29 in the front-rear direction or the left-right direction. Since it can be shortened, it is possible to reduce the size of the photographing optical device 1 in the front-rear and left-right directions. Further, the side surface of the first holder portion 10a in the front / rear / left / right direction may protrude outward in the front / rear / left / right direction from the outer surface of the driving magnet 29 in the front / rear / left / right direction.

  In the embodiment described above, the outer side surface in the front / rear / right / left direction of the driving magnet 29 faces the long side portion disposed on the upper side of the two long side portions of the coil portion 27 via a predetermined gap. . In addition to this, for example, the outer side surface of the driving magnet 29 in the front / rear / left / right direction is opposed to the long side portion disposed below the two long side portions of the coil portion 27 via a predetermined gap. May be. In this case, the sheet-like coil 28 can be disposed above the upper end surface of the first holder portion 10a. When the sheet-like coil 28 is disposed above the upper end surface of the first holder portion 10a, the drive magnet 29 and the sheet-like coil 28 can be reduced by reducing the thickness of the drive magnet 29 in the front-rear direction or the left-right direction. It is possible to dispose the sheet-like coil 28 on the inner side in the front-rear and left-right directions while securing a gap between them. Therefore, in this case, the distance between the side surface of the movable module 4 and the inner peripheral surface of the case body 15 can be shortened, and the photographing optical device 1 can be further downsized in the front-rear and left-right directions. .

  In the embodiment described above, the driving magnet 29 is fixed to the movable module 4 on the outer peripheral side of the second holder portion 10 b, and the sheet coil 28 is fixed to the inner peripheral surface of the cylindrical portion 15 b of the case body 15. In addition, for example, the sheet-like coil 28 may be fixed to the movable module 4 on the outer peripheral side of the second holder portion 10b, and the driving magnet 29 may be fixed to the inner peripheral surface of the cylindrical portion 15b. Even in this case, in the front-rear and left-right directions, the movable module is provided by the thickness of the sheet-like coil 28 in the front-rear direction or the left-right direction, or by a part of the sheet-like coil 28 in the front-rear direction or the left-right direction. Since the distance between the side surface 4 and the inner peripheral surface of the case body 15 can be shortened, the photographic optical device 1 can be downsized in the front-rear and left-right directions. In this case, the case body 15 is preferably formed of a magnetic material.

  In the embodiment described above, the swing mechanism 7 includes the four drive magnets 29 formed in an elongated rectangular parallelepiped shape. In addition to this, for example, in the swing mechanism 7, instead of the four drive magnets 29, the inner peripheral end when viewed from the optical axis direction has a circular shape, and the outer periphery when viewed from the optical axis direction. One driving magnet formed in a flat cylindrical shape having a square end shape may be provided. Further, the swing mechanism 7 may include four driving magnets formed by removing four corners of the one driving magnet in place of the four driving magnets 29. That is, the rocking mechanism 7 has an inner surface in the front-rear direction or the left-right direction when viewed from the optical axis direction, instead of the driving magnet 29 formed in an elongated rectangular parallelepiped shape, and is formed from the optical axis direction. You may provide the driving magnet by which the outer surface of the front-back direction or the left-right direction when it sees is formed in linear form. That is, the swing mechanism 7 may include a driving magnet that increases the thickness in the front-rear direction or the left-right direction at the four corners of the lens holder 10 instead of the driving magnet 29.

  In the form mentioned above, the 1st holder part 10a comprises the lower end side part of the lens holder 10, and the 2nd holder part 10b comprises the upper end side part of the lens holder 10. FIG. In addition, for example, the first holder portion 10 a may constitute the upper end side portion of the lens holder 10, and the second holder portion 10 b may constitute the lower end side portion of the lens holder 10. Moreover, while the 2nd holder part 10b may comprise the intermediate part of the lens holder 10 in an up-down direction, the 1st holder part 10a may comprise the up-and-down both ends part of the lens holder 10 in an up-down direction.

  In the embodiment described above, the swing mechanism 7 includes the sheet coil 28. In addition to this, for example, the swing mechanism 7 may include an air-core coil wound in an air-core shape instead of the sheet-like coil 28. In the embodiment described above, the surface of the driving magnet 29 facing the coil portion 27 is magnetized to a single pole, but the surface of the driving magnet 29 facing the coil portion 27 is magnetized to two poles. Also good. In the embodiment described above, the leaf spring 6 is disposed on the upper end side of the movable module 4. However, the leaf spring 6 may be disposed on the lower end side of the movable module 4. In the embodiment described above, the spring fixing member 35 is fixed to the metal member 33, but the spring fixing member 35 may be fixed to the lens holder 10.

  In the embodiment described above, the distance between the image sensor and the lens is fixed. In addition, for example, the movable module 4 may include a lens driving mechanism for changing the distance between the imaging element and the lens. That is, the movable module 4 may be a camera module having a focus function and a zoom function. In the above-described embodiment, the length W1 of the photographing optical device 1 in the optical axis direction is longer than the length W2 of one side of the photographing optical device 1 when viewed from the optical axis direction. The length W1 may be equal to the length W2, and the length W1 may be shorter than the length W2.

  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. In this case, the lens holder 10 and the metal members 32 and 33 are formed in a shape corresponding to the shape of the imaging optical device 1.

DESCRIPTION OF SYMBOLS 1 Optical apparatus for imaging | photography 4 Movable module 5 Support body 6 Leaf spring (spring member)
6a Movable side fixed portion 6b Support side fixed portion 6c Arm portion 7 Oscillating mechanism 10a First holder portion (first module portion)
10b Second holder part (second module part)
12 FPC (Flexible Printed Circuit Board)
15 Case body 15a Bottom part (end face part)
16 Base plate 16b Protruding portion 17 Spring fixing member (first spring fixing member)
17a fixed part 17b spring fixing part 20 fulcrum part 27 coil part (driving coil)
29 Driving magnet 32, 33 Metal member 35 Spring fixing member (second spring fixing member)
W1 Length of photographing optical device in optical axis direction W2 Length of one side of photographing optical device viewed from optical axis direction L Optical axis Z Optical axis direction Z1 Subject side Z2 Anti-subject side

Claims (11)

A movable module having a lens and an image sensor, a support that holds the movable module in a swingable manner, a spring member that connects the movable module and the support, and swings the movable module with respect to the support And a swing mechanism
The swing mechanism includes a driving magnet fixed to one of the movable module and the support, and a driving coil fixed to either the movable module or the support,
The support includes a cylindrical case body disposed so as to surround a side surface of the movable module in a direction orthogonal to the optical axis direction of the lens,
The movable module includes a first module portion and a second module portion that are formed in a substantially cylindrical shape, the lens is fixed on the inner peripheral side, and is formed with a size corresponding to the outer diameter of the lens,
The second module part is smaller than the first module part in a direction orthogonal to the optical axis direction,
Either the driving magnet or the driving coil is fixed to the movable module on the outer peripheral side of the second module part,
Either the drive magnet or the drive coil is fixed to the inner peripheral surface of the case body so as to face either the drive magnet or the drive coil,
The spring member includes a movable side fixed portion fixed to the movable module, a support side fixed portion fixed to the support body, and a plurality of arm portions connecting the movable side fixed portion and the support side fixed portion. With
The movable side fixing portion is disposed on an inner peripheral side with respect to the support side fixing portion when viewed from the optical axis direction, and is an outer peripheral surface of the first module portion in a direction orthogonal to the optical axis direction. An optical device for photographing, wherein the optical device is disposed inside. The photographing optical device is formed in a substantially quadrangular prism shape having a substantially square shape when viewed from the optical axis direction,
2. The photographing according to claim 1, wherein a length of the photographing optical device in the optical axis direction is longer than a length of one side of the photographing optical device when viewed from the optical axis direction. Optical device. The first module portion is formed so that an outer shape when viewed from the optical axis direction is a substantially rectangular shape or a substantially square shape,
3. The photographing optical device according to claim 1, wherein the second module portion is formed so that an outer shape when viewed from the optical axis direction is substantially circular. 4. When one side of the optical axis direction is the subject side and the other side of the optical axis direction is the anti-subject side,
4. The photographing optical apparatus according to claim 1, wherein the second module unit is formed so as to protrude from a subject side end of the first module unit toward a subject side. 5. When one side of the optical axis direction is the subject side and the other side of the optical axis direction is the anti-subject side,
A flexible printed circuit board that is electrically connected to the image sensor and is drawn out from the non-subject side of the movable module;
The support includes a base plate that forms an end surface on the side opposite to the subject of the photographing optical device,
The base plate is formed with a protruding portion that protrudes toward the non-subject side,
The case body constitutes a side surface of the photographing optical device in a direction orthogonal to the optical axis direction,
The protrusion is disposed on the inner side of the outer peripheral surface of the case body in a direction orthogonal to the optical axis direction when viewed from the optical axis direction,
The flexible printed circuit board is pulled out to the opposite object side along the projecting portion, and in a direction perpendicular to the optical axis direction when viewed from the optical axis direction, than the outer peripheral surface of the case body. The photographing optical device according to claim 1, wherein the photographing optical device is fixed to the projecting portion so as to be disposed inside. The driving magnet is fixed to the movable module,
6. The photographing optical device according to claim 1, wherein the driving coil is fixed to the support. The driving coil is fixed to the movable module,
6. The photographing optical apparatus according to claim 1, wherein the driving magnet is fixed to the support.   The photographing optical device according to any one of claims 1 to 7, wherein a surface of the driving magnet facing the driving coil is magnetized to a single pole. The movable module is formed so that the shape when viewed from the optical axis direction is a substantially rectangular shape or a substantially square shape,
The swing mechanism includes four drive magnets having a rectangular parallelepiped shape arranged along four sides of the movable module when viewed from the optical axis direction.
When one side of the optical axis direction is the subject side and the other side of the optical axis direction is the anti-subject side,
9. A metal member formed in a substantially rectangular or substantially square frame shape is fixed to an end surface on the subject side and an end surface on the opposite subject side of the four drive magnets. An optical device for photographing according to any one of the above. A fulcrum portion serving as a fulcrum for swinging the movable module with respect to the support;
The support includes a first spring fixing member to which the support side fixing portion is fixed,
The movable module includes a second spring fixing member to which the movable side fixing portion is fixed,
When one side of the optical axis direction is the subject side and the other side of the optical axis direction is the anti-subject side,
The case body includes an end surface portion constituting an end surface on the subject side of the photographing optical device,
The first spring fixing member includes a fixed portion that is fixed to a surface of the end surface portion on the side opposite to the subject, and a spring fixing portion that protrudes from the fixed portion toward the anti-subject side and to which the support side fixing portion is fixed. And
The second spring fixing member is disposed closer to the subject than the first module part and the second module part,
The fulcrum portion is disposed on the opposite subject side than the movable module,
The movable side fixing portion is fixed to an end surface on the subject side of the second spring fixing member, and is disposed closer to the subject side than the supporting side fixing portion. The optical apparatus for photography as described.   11. The photographing optical apparatus according to claim 1, wherein the movable module is a fixed focus type camera module in which a distance between the imaging element and the lens is fixed.

Images