JP6635397B1 - Optical element driving device, camera device, and electronic device - Google Patents

Abstract

Provided are an optical element driving device, a camera device, and an electronic device that can easily return an optical element to be mounted to an initial position. A prism driving device includes a support shaft for swingably supporting a holding member with respect to a housing, and a leaf spring for connecting the housing with the holding member. I have. The leaf spring 70 is provided to extend on a YZ plane that is a plane including the Y direction in which the support shaft 50 extends. Therefore, the holding member 40 supporting the prism 30 can easily return to the initial position by the elastic force of the leaf spring 70. [Selection diagram] FIG.

Description

  The present invention relates to an optical element driving device, a camera device, and an electronic device used for an electronic device such as a smartphone.

  Some camera devices mounted on electronic devices such as smartphones include a prism for correcting image blur and a member that holds the prism in a swingable manner. There is a configuration in which light is guided to an imaging surface. Patent Document 1 discloses a technique relating to this type of camera device. The latent-type imaging module described in Patent Document 1 includes a prism, a prism pedestal having a tapered surface on which the prism is mounted, a support shaft inserted through a shaft hole of the prism pedestal, and a driving force of the prism pedestal. It has a magnet and a coil to be created, and a housing that swingably supports both ends of the support shaft. In this latent imaging module, the driving force of the magnet and the coil causes the prism pedestal and the prism on its support surface to swing about the support axis as the swing axis.

China Utility Model CN205942054U

  However, in the latent photography module of Patent Document 1, a magnet is arranged on the bottom surface of the prism pedestal opposite to the side on which the prism is mounted, and the coil and the magnetic yoke are arranged at a position facing the magnet in the housing. Had a configuration. For this reason, there was a problem that it was difficult to return the prism to the initial position.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide an optical element driving device, a camera device, and an electronic device that can easily return an mounted optical element to an initial position. I do.

  In order to solve the above-mentioned problem, an optical element driving device according to a preferred aspect of the present invention includes a holding member having a fixing portion, a supporting portion for supporting an optical element, and a holding member extending in a predetermined direction. A supporting shaft that swingably supports the member with respect to the fixed portion; and a leaf spring that extends in a plane including the predetermined direction and connects the fixed portion and the holding member. It is characterized by the following.

  In this aspect, the leaf spring may extend on the plane including the thickness direction of the fixing portion.

  Further, the leaf spring is formed at both ends in the predetermined one direction and is attached to one of the fixed portion or the holding member, and an outer portion formed at the center in the predetermined one direction, and the fixed portion or the A central portion attached to the other of the holding members, and a plurality of arms having a meandering shape and connecting the outer portion and the central portion, wherein the outer portion and the central portion are different from each other in the plane. May extend in one direction.

  Further, the leaf spring may be formed to be line-symmetric as a whole with the central portion as a symmetry axis.

  Further, one leaf spring piece between the one outer part and the central part and the other leaf spring piece between the other outer part and the central part are respectively the one direction and the It may be formed symmetrically in another direction.

  In addition, one wire constituting the arm portion faces the European character “S” and its mirror character, and extends each end facing the outside of the two characters along the predetermined one direction. It may have a shape of being connected to a central portion and the outer portion, and having end portions facing inward extending and connected along the predetermined one direction.

  A camera device according to another preferred embodiment of the present invention includes the above-described optical element driving device.

  An electronic device according to another preferred embodiment of the present invention includes the above-described camera device.

  The present invention includes a support shaft for swingably supporting the holding member with respect to the fixed portion, and a leaf spring connecting the fixed portion and the holding member, wherein the leaf spring has a predetermined length on which the support shaft extends. Is provided to extend on a plane including one direction. Therefore, the holding member supporting the optical element can easily return to the initial position by the elastic force of the leaf spring. Therefore, according to the present invention, it is possible to provide an optical element driving device capable of easily returning the mounted optical element to the initial position.

FIG. 1 is a front view of a smartphone 400 which is an electronic device on which a camera device 1 including a prism driving device 3 according to an embodiment of the present invention is mounted. FIG. 2 is a perspective view of a camera device 1 including the prism driving device 3 of FIG. FIG. 3 is a sectional view taken along line A-A ′ of FIG. 2. FIG. 3 is a perspective view of the camera device 1 including the prism driving device 3 of FIG. 2 as viewed from another viewpoint. (A) is a cross-sectional view taken along the line B-B 'of FIG. 4, and (B) is an enlarged view in a frame of (A). FIG. 3 is an exploded perspective view of the prism driving device 3 of FIG. 2. FIG. 7 is a perspective view of the FPC 80, the coil 64, the housing 10, the support bearings 26 and 27, the holding member 40, the support shaft 50, the magnet 61, the leaf spring 70, and the prism 30 of FIG. (A) is a view of the support shaft 50 of FIG. 6 viewed from the direction of arrow C, (B) is a view of (A) viewed from the direction of arrow D, and (C) is a view of the support shaft 50 of (A). FIG. 4 is a diagram illustrating a relationship between a second outer peripheral surface 52 and a reflecting surface 32 of a prism 30. FIG. 8 is a view of the leaf spring 70 of FIGS. 6 and 7 viewed from an arrow E direction. (A) is a diagram showing a state of the leaf spring 70 when the holding member 40 of the prism driving device 3 of FIG. 1 is swung counterclockwise, and (B) is a diagram in which the holding member 40 is swung in the opposite direction. FIG. 6 is a diagram illustrating a state of a leaf spring 70 when moved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the camera device 1 is embedded in a back corner of the housing of the smartphone 400. The camera device 1 includes a prism 30 and a lens body 9 that are optical elements, a prism driving device 3, a lens driving device 8, and an image sensor that photoelectrically converts light guided from a subject via the prism 30 and the lens body 9. 100.

  Hereinafter, the optical axis direction along the optical axis of the lens body 9 is appropriately referred to as an X direction. One direction orthogonal to the X direction and light from the subject incident on the prism 30 is appropriately called a Z direction, and a direction orthogonal to both the X direction and the Z direction is appropriately called a Y direction. Further, a side of the prism body 30 in the X direction viewed from the lens body 9 is referred to as an upper side, and an opposite side of the image sensor 100 is referred to as a lower side. The side of the subject viewed from the prism 30 in the Z direction is referred to as a front side, and the opposite side is referred to as a rear side. Also, one side in the Y direction may be referred to as a left side, and the other may be referred to as a right side. The Z direction is a thickness direction of the camera device 1, the prism driving device 3, and the lens driving device 8, and is a thickness direction of a fixed portion described later.

  As shown in FIGS. 2 and 4, the case 90 of the camera device 1 has a hollow rectangular parallelepiped shape. The lens body 9 and the lens driving device 8 for holding the same, and the prism 30 and the prism driving device 3 for holding the same are arranged in the space in the case 90 in the X direction. The prism driving device 3 is an optical element driving device. The optical element may be a reflecting mirror or the like in addition to the prism 30.

  As shown in FIG. 6, the front plate 91 of the case 90 has an opening 911, and the rear plate 95 has an opening 951. The opening 911 allows the lens body 9 to pass through and exposes the incident surface 31 of the prism 30. A plate 912 is attached to the front opening 911, and a plate 952 is attached to the rear opening 951, and covers the lens body 9 from front and rear. When the plate 912 is mounted on the opening 911, the prism 30 is exposed to the front from the upper part of the opening 911. The base 941 is fitted into the lower opening of the case 90. The image sensor 100 is fixed to the base 941 with its light receiving surface facing the lens body 9. The casing 10 of the prism driving device 3 described later is fitted into and exposed in the upper opening of the case 90.

  The lens driving device 8 holds the lens body 9 and drives the lens body 9 in the X direction and the Y direction by an electric signal provided from the substrate of the smartphone 400. As shown in FIG. 3, the lens driving device 8 includes an X-direction support spring (not shown), an X-direction drive magnet and an X-direction drive coil (not shown), a Y-direction support spring (not shown), and a Y-direction support spring. It has a driving magnet and a Y-direction driving coil (not shown). When a current is supplied to the X-direction driving coil or the Y-direction driving coil of the lens driving device 8, an electromagnetic force is generated in the X-direction driving coil or the Y-direction driving coil, and the electromagnetic force is generated against the urging force of the X-direction spring or the Y-direction spring. Accordingly, the lens body 9 moves in the X direction or the Y direction. The focus can be adjusted by moving the lens body 9 in the X direction, and the camera shake can be corrected in the Y direction by moving the lens body 9 in the Y direction.

  The prism driving device 3 holds the prism 30 and drives the prism 30 around an axis parallel to the Y direction by an electric signal provided from the substrate of the smartphone 400. Thus, camera shake correction in the Z direction can be performed. As shown in FIGS. 6 and 7, the prism driving device 3 includes an FPC (Flexible Printed Circuits) 80, a coil 64, a housing 10, support bearings 26 and 27, a holding member 40, a support shaft 50, , A leaf spring 70. The FPC 80, the coil 64, the housing 10, and the support bearings 26 and 27, including the case 90, are collectively referred to as a fixing portion.

  The FPC 80 is a member that plays a role in relaying current supply from the substrate of the smartphone 400 to the coil 64. The FPC 80 has a T-shaped first surface 81 and a U-shaped second surface 82. The first surface portion 81 of the FPC 80 is folded at the connection portion with the second surface portion 82 with the rear plate 95 of the case 90 interposed therebetween, and is housed inside the case 90. That is, the FPC 80 is mounted on the case 90 such that the first plate 81 and the second surface 82 sandwich the rear plate 95 of the case 90 from both sides in the Z direction.

  At one corner of the front surface of the first surface portion 81 of the FPC 80, a concave portion 83 that is concave on the rear side is provided. The coil 64 is fixed to the first surface 81 of the FPC 80. The coil 64 has two straight portions extending in the X direction and two semicircular portions connecting them. One of the two semicircular portions of the coil 64 straddles the concave portion 83. The outer part of the recess 83 is outside the coil 64 and the inner part is inside the coil 64. The outer end of the coil 64 is connected to the first surface 81 of the FPC 80, and the inner end of the coil 64 is drawn out of the coil 64 via the recess 83 and connected to the first surface 81 of the FPC 80. You.

  The housing 10 is located at a position in the case 90 that covers the first surface portion 81 of the FPC 80 from the front side. The housing 10 has two side plates 16 and 17 facing each other in the Y direction, and an upper plate 13 and a rear plate 15 interposed between the two side plates 16 and 17. In the middle of each of the two side plates 16 and 17, there are formed through holes 165 and 175 having a perfect circular shape. A concave portion extending in the Z direction is provided at a central rear portion of the upper plate 13, and a convex portion 431 of the holding member 40 described later is accommodated in the concave portion. An opening 151 for accommodating the coil 64 is formed in the rear plate 15. The small diameter portion 261 of the support bearing 26 is inserted into the through hole 165, and the small diameter portion 271 of the support bearing 27 is inserted and fixed into the through hole 175.

  The support bearings 26 and 27 are interposed between the through holes 165 and 175 and the support shaft 50, and support the support shaft 50 so as to be swingable in the support holes 265 and 275, and assist the swing of the support shaft 50. It is a member that does. The support bearings 26 and 27 have cylindrical small diameter portions 261 and 271 having substantially the same diameter as the through holes 165 and 175, and cylindrical large diameter portions 262 and 272 having a slightly larger diameter. . Support holes 265 and 275 are formed at the centers of the support bearings 26 and 27, respectively. The support hole 265 extends between both end surfaces of the support bearing 26, and the support hole 275 extends between both end surfaces of the support bearing 27. The small diameter portions 261 and 271 of the support bearings 26 and 27 are inserted into the through holes 165 and 175 and fixed to the housing 10.

  The housing 10 accommodates a unit in which the prism 30, the holding member 40, and the support shaft 50 are integrated, and the holding member 40 is supported by the housing 10 via a leaf spring 70. The prism 30 has an entrance surface 31, a reflection surface 32, an exit surface 34, and both side surfaces 36 and 37 in the Y direction orthogonal to these. The prism 30 has an optical axis parallel to the Z direction from the entrance surface 31 to the reflection surface 32 and an optical axis parallel to the X direction from the reflection surface 32 to the emission surface 34. Light incident on the entrance surface 31 of the prism 30 from the subject is reflected on the reflection surface 32 and guided to the lens body 9 via the emission surface 34.

  The holding member 40 is a member that serves to hold the prism 30. The holding member 40 is shaped like a rectangular parallelepiped extending in the Y direction, with a triangular prism-shaped portion occupying substantially half of the rectangular solid being cut away. That is, the holding member 40 includes a solid portion 41 having a right-angled isosceles triangular prism shape, and two wall portions extending in a right-angled isosceles triangular shape from an end portion of the solid portion 41 in the Y direction and facing in the Y direction. 46 and 47. The holding member 40 has a rectangular shape when viewed from the Y direction. Through holes 465 and 475 are provided at boundaries between the wall portions 46 and 47 and the solid portion 41, respectively.

  As shown in FIG. 6, the end surface 42 facing the front lower direction, which corresponds to the base of the right triangle in the solid portion 41 of the holding member 40, has a tapered surface inclined by approximately 45 degrees with respect to the XY plane and the YZ plane. It has become. In the end surface 42, semicircular support portions 48 slightly raised from the end surface 42 are provided at positions separated from each other at a boundary portion between the wall portions 46 and 47. The support part 48 is for mounting the prism 30. The tips of the four support portions 48 form a support surface 49, and the support surface 49 coincides with the reflection surface 32 of the prism 30. The centers of the support holes 265 and 275 of the support bearings 26 and 27 coincide with each other when viewed from the Y direction, and are included in the support surface 49. The support surface 49 and the end surface 42 are substantially parallel, and the end surface 42 does not protrude beyond the support surface 49.

  The end surface 42 of the solid portion 41 has a concave portion 425 that is hollowed out in a semicircular shape. When viewed from the Y direction, the through hole 465 of the wall 46 and the through hole 475 of the wall 47 overlap with the recess 425 of the solid portion 41. The through holes 465 and 475 and the concave portion 425 are provided substantially at the center of the end surface 42. A support shaft 50 to be described later is accommodated and fixed in the through holes 465 and 475 and the concave portion 425. The end face 42 is provided with four recesses 424 each of which is recessed in a stepwise manner so that the weight around the support shaft 50 is balanced when the prism 30 is mounted.

  As shown in FIG. 3 and FIG. 5A, a recess for accommodating and fixing the magnet 61 is provided on the rear surface 45 of the solid portion 42. The magnet 61 is a member that plays a role as a driving unit that drives the holding member 40 together with the coil 64. The rear end face of the magnet 61 faces the coil 64 with a slight gap. As shown in FIGS. 3 and 7, a central portion in the Y direction on the upper surface 43 of the solid portion 41 projects upward as a convex portion 431. The projection 431 is fitted into the opening 731 of the leaf spring 70.

  The support shaft 50 is a member that plays a role of supporting the holding member 40 swingably. As shown in FIGS. 8 (A) and 8 (B), the support shaft 50 has a shape that is cut away from an elongated columnar shape while leaving a portion occupying the center in the extending direction in a semi-cylindrical shape. I have. The diameter of the support shaft 50 is slightly smaller than the diameter of the through holes 465, 475, 265, and 275. The length of the support shaft 50 is longer than the interval between the wall portions 46 and 47 of the holding member 40 opposed in the Y direction, and shorter than the interval between the plates 96 and 97 of the case 90 opposed in the Y direction.

  Both ends of the support shaft 50 are cylindrical. The central portion of the support shaft 50 has a first outer peripheral surface 55 and a second outer peripheral surface 52. The first outer peripheral surface 55 is flush with the cylindrical outer peripheral surfaces at both ends along the axis AXS passing through the center O of the column. The center of the first outer peripheral surface 55 is located at the same position as the axis AXS. The second outer peripheral surface 52 is substantially flat. The second outer peripheral surface 52 is located inside the outer peripheral surface of the columnar shape, and is provided at a position cut out beyond the axis AXS. The boundary between the second outer peripheral surface 52 and the upright surfaces 571 and 561 at both ends is gently curved. As shown in FIG. 8 (C), the prism 30 is disposed so as to fit within a position cut out beyond the axis AXS.

  The support shaft 50 is supported such that the second outer peripheral surface 52 thereof is oriented in the normal direction of the end surface 42 of the holding member 40, and the center portion is fitted into the concave portion 425 of the holding member 40. Both ends of the support shaft 50 in the Y direction pass through the through holes 465 and 475 of the holding member 40, and are inserted from one ends of the support holes 265 and 275 of the support bearings 26 and 27 halfway. The center O of the columnar shape at both ends of the support shaft 50 and the centers of the through holes 465 and 475 of the holding member 40 coincide.

  As shown in FIG. 5B, the inner surface of the plate 96 of the case 90 and the inner surface of the plate 97 face each other in the Y direction with the housing 10 interposed therebetween, and the end surfaces of the large-diameter portions 262 and 272 of the support bearings 26 and 27. Is in contact with The inner surface of the plate 96 and the inner surface of the plate 97 cover the other end sides of the support hole 265 of the support bearing 26 and the support hole 275 of the support bearing 27.

  The side surfaces 36 and 37 of the prism 30 on the support surface 49 of the holding member 40 and the walls 46 and 47 of the holding member 40 are adhesively fixed. A part of the outer peripheral surface of the support shaft 50 composed of the first outer peripheral surface 55 and the cylindrical outer peripheral surfaces at both ends is fixed to at least one of the through holes 465 and 475 or the concave portion 425 of the holding member 40. . An adhesive is provided between the outer peripheral surface of the support shaft 50 in the through hole 465 and the inner peripheral surface of the through hole 475, and between the outer peripheral surface of the support shaft 50 in the through hole 475 and the inner peripheral surface of the through hole 475. Is filled, and the holding member 40 and the support shaft 50 are fixed. Thus, the holding member 40, the prism 30, and the support shaft 50 are integrated.

  When the holding member 40, the prism 30, and the support shaft 50 are integrated, when viewed from the Y direction, the center O of the first outer peripheral surface 55 of the support shaft 50 is equal to the support surface 49 of the holding member 40 and the prism 30. The entire second outer peripheral surface 52 is on the reflective surface 32, and is closer to the first outer peripheral surface 55 than the support surface 49 and the reflective surface 32. That is, since the second outer peripheral surface 52 is less than the height of the supporting surface 49 of the holding member 40 and the reflecting surface 32 as shown in FIG. Do not touch. Further, even if the second outer peripheral surface 52 is not parallel to the end surface 42, the second outer peripheral surface 52 is set to be lower than the height of the support surface 49 of the holding member 40. Thereby, as shown in FIG. 8C, a gap GP is formed between the reflection surface 32 of the prism 30 and the second outer peripheral surface 52 of the support shaft 50.

  As shown in FIG. 5 (B), in the portion of the support shaft 50 that is fitted in the support holes 265 and 275 of the support bearings 26 and 27, the outer peripheral surface of the support shaft 50 and the inner peripheral surface of the support hole 265 And between the outer peripheral surface of the support shaft 50 and the inner peripheral surface of the support hole 275 are filled with a viscoelastic resin. The viscoelastic resin is a so-called damper gel. Damper gel is also provided on the end faces 56 and 57 of the support shaft 50. With this damper gel, the vibration generated in the unit in which the holding member 40, the prism 30, and the support shaft 50 are integrated by being supported by the leaf spring 70 can be quickly converged. Further, the damper gel can easily maintain the shape with respect to a normal so-called liquid lubricant, and can easily maintain the support shaft 50 at the center position of the support holes 265 and 275. Further, the spaces between the end surfaces 56 and 57 of the support shaft 50 and the plates 96 and 97 of the case 90 serving as the fixing portion in the support holes 265 and 275 are airtight. In addition, the holding member 40, the prism 30, and the integrated holding member 40 can swing with respect to the housing 10.

  The leaf spring 70 is a member that serves to restrict the movement of the holding member 40, the prism 30, and the integrated holding member 40 by connecting the housing 10, which is a fixed portion, to the holding member 40. The leaf spring 70 is provided so as to extend in the YZ plane, that is, is provided so as to extend in the direction in which the support shaft 50 extends and the thickness direction of the housing 10 that is the thickness direction of the fixed body. ing. That is, the leaf spring 70 is provided along the laminating direction of the coil 64 and the magnet 61 so as not to overlap with the coil 64 and the magnet 61. As shown in FIG. 9, the leaf spring 70 includes outer portions 76 and 77 formed at both ends, a central portion 73 formed at the center, an arm portion 760 connecting the outer portions 76 and 77 and the central portion 73, and 770. Each of the two arms 760 and 770 has a serpentine shape. The outer portion 76, the central portion 73, and the outer portion 77 are formed so as to extend in the Z direction and be arranged in the Y direction. For convenience, a portion having the outer portion 76, the central portion 73, and the arm portion 760 and a portion having the outer portion 77, the central portion 73, and the arm portion 770 are referred to as leaf spring pieces. The leaf spring 70 is formed line-symmetrically as a whole with the central portion 73 as the axis of symmetry. Further, the two leaf spring pieces are formed line-symmetrically in the Y direction and the Z direction, respectively.

  More specifically, the leaf spring 70 is a plate as a whole, and the central portion 73 and the outer portions 76 and 77 are also flat plate members. At the center of the central portion 73, there is a rectangular opening 731. The size of the opening 731 is slightly larger than the size of the protrusion 431 of the holding member 40. The arm part 760 has a first wire 761 connecting the front ends of the central part 73 and the outer part 76, and a second wire 762 connecting the rear ends of the central part 73 and the outer part 76. The arm portion 770 has a first wire 771 connecting the central portion 73 and the front end of the outer portion 77, and a second wire 772 connecting the central portion 73 and the rear end of the outer portion 77. .

  The first wires 761 and 771 and the second wires 762 and 772 face the European character "S" and the mirror character thereof, and extend each end facing outward of the two characters along the Y direction to form a central portion. It has such a shape that it is connected to 73 and the ends of the outer parts 76 and 77, and the ends facing inward are connected and extended along the Y direction.

  The leaf spring 70 is fixed to the holding member 40 such that the projection 431 of the holding member 40 is fitted into the opening 731. The outer portions 76 and 77 of the leaf spring 70 are fixed to protrusions 432 located at intersections between the side plates 16 and 17 of the housing 10 and the upper plate 13. The leaf spring 70 is mounted while maintaining a substantially flat plate. The holding member 40 in the housing 10 is held by the leaf spring 70 such that the upper surface 43 thereof is at a position where the upper surface 43 faces parallel to the upper plate 13 of the housing 10 (hereinafter, this position is referred to as an initial position). It is.

  In FIG. 3, when a current flows from the FPC 80 to the coil 64, a driving force in the X direction is generated in the magnet 61 due to an electromagnetic action between the coil 64 and the magnet 61. Since the magnet 61 is displaced rearward in the Z direction with respect to the support shaft 50, when a lower driving force in the X direction is generated in the magnet 61, the holding member 40 and the prism 30 held therein are generated. Rotates counterclockwise about the support shaft 50. At this time, since the holding member 40 and the housing 10 are connected by the leaf spring 70, the prism 30 and the holding member 40 are moved until the driving force generated in the magnet 61 and the urging force accompanying the deformation of the leaf spring 70 are balanced. , And the support shaft 50 are rotated. Thus, the light emitted from the prism 30 is emitted in a direction rotated counterclockwise with respect to the light emitted at the initial position, and reaches the image sensor 100 via the lens body 9. When the supply of the current to the coil 64 is stopped, the prism 30, the holding member 40, and the support shaft 50 are rotated clockwise by the restoring force of the leaf spring 70, and return to the initial position.

  When a current in the opposite direction is applied to the coil 64, a driving force in the upper direction in the X direction is generated in the magnet 61, and the prism 30, the holding member 40, and the support shaft 50 are moved to a position where the driving force and the urging force are balanced. The integrated one rotates clockwise. As a result, the light emitted from the prism 30 is emitted in the clockwise direction with respect to the light emitted at the initial position, and reaches the image sensor 100 via the lens body 9. When the supply of the current to the coil 64 is stopped, the integrated structure of the prism 30, the holding member 40, and the support shaft 50 rotates counterclockwise and returns to the initial position.

  As shown in FIGS. 10A and 10B, when the prism 30, the holding member 40, and the support shaft 50 are integrated and swing with the support shaft 50 as the swing axis, the center of the leaf spring 70 is rotated. The part 73 relatively moves in the front-rear direction with respect to the outer parts 76 and 77. Strictly, at this time, the central portion 73 of the leaf spring 70 swings in an arc around the support shaft 50, so that the leaf spring 70 is twisted between the central portion 73 and the outer portions 76 and 77. Deform.

The above is the details of the present embodiment. According to the present embodiment, the following effects can be obtained.
In the present embodiment, both ends of the support shaft 50 fitted into the support holes 265 and 275 have a cylindrical shape, and a center portion is flush with a cylindrical outer peripheral surface along the cylindrical axis AXS. It has one outer peripheral surface 55 and a second outer peripheral surface 52 inside the outer peripheral surface of the columnar shape. The center of the first outer peripheral surface 55 is on the support surface 49, and the entire second outer peripheral surface 52 is on the first outer peripheral surface 55 side of the support surface 49. Therefore, the reflection surface 32 of the prism 30 placed on the support surface 49 can be made coincident with the center of the outer peripheral surface of the support shaft 50 which is the swing axis. Therefore, according to the present embodiment, it is possible to provide the prism driving device 3 which requires a small space for swinging and is easy to downsize.

  Further, in the present embodiment, the support shaft 50 that swingably supports the holding member 40 with respect to the housing 10 and the leaf spring 70 that connects the housing 10 to the holding member 40 are provided. The leaf spring 70 is provided to extend on a YZ plane which is a plane including the Y direction in which the support shaft 50 extends. Therefore, the holding member 40 supporting the prism 30 can easily return to the initial position by the elastic force of the leaf spring 70. Therefore, according to the present embodiment, it is possible to provide the prism driving device 3 that can easily return the mounted prism 30 to the initial position.

  Further, in the present embodiment, a support shaft 50 that supports the holding member 40, and a fixing portion that is arranged at both ends of the support shaft 50 and supports the support shaft 50 so as to swing freely in the support holes 265 and 275. , And support bearings 26 and 27. A resin having viscoelasticity is filled between the outer peripheral surface of the support shaft 50 and the inner peripheral surfaces in the support holes 265 and 275 of the support bearings 26 and 27. This resin makes it difficult for an impact to be transmitted to the support shaft 50, that is, the prism 30 supported by the support shaft 50. Therefore, according to the present embodiment, it is possible to provide the prism driving device 3 in which the impact is hardly transmitted to the prism 30 even when the impact is applied.

  Further, in the present embodiment, there are provided a support shaft 50 fixed to the holding member 40, and support bearings 26 and 27 which are fixing portions for swingably supporting the support shaft 50 in the support holes 265 and 275. ing. The support shaft 50 is fitted halfway from one end of the support holes 265 and 275, and the plates 96 and 97 of the case 90, which are fixed portions, block the other end sides of the support holes 265 and 275. The space between the support shaft 50 and the plates 96 and 97 in the support holes 265 and 275 of the support bearings 26 and 27 becomes airtight, and air is formed in this space, and this air pool acts as an air spring. . Therefore, even if the support shaft 50 moves in the Y direction, it does not collide with the plates 96 and 97, and even if it does, the impact is small. Therefore, according to the present embodiment, it is possible to provide the prism driving device 3 in which the prism 30, the holding member 40 that supports the prism 30, and the support shaft 50 are hard to move along the support shaft 50 and collide with other portions. Can be.

  In this embodiment, the support shaft 50 may be directly fitted into the through holes 165 and 175 of the housing 10 without providing the support bearings 26 and 27. In this case, the through holes 165 and 175 are regarded as the support holes 265 and 275. The thickness of the two side plates 16 and 17 of the housing 10 and the through holes 165 and 175 at the center thereof are increased in the Y direction, and the diameters of the through holes 165 and 175 are slightly larger than the diameter of the support shaft 50. Both ends of the support shaft 50 are inserted into the holes 165 and 175, and a resin having viscoelasticity is filled between the inner peripheral surfaces of the through holes 165 and 175 and the outer peripheral surface of the support shaft 50. It is preferable that the outer side surface is brought into contact with the inner side surfaces of the plates 96 and 97 of the case 90 to close the through holes 165 and 175.

  In this embodiment, if the leaf spring 70 is provided along the direction in which the support shaft 50 extends, that is, if it is provided so as to extend in a plane including the Y direction, along the thickness direction of the housing 10. It does not need to be provided. For example, it may be provided so as to extend in a direction parallel to the end surface 42. Also in this case, the central portion 73 and the outer portions 76 and 77 of the leaf spring 70 are provided so as to be always arranged in the Y direction.

  In the present embodiment, the members closing the support holes 265 and 275 of the support bearings 26 and 27 need not be the plates 96 and 97 of the case 90. For example, a member that merely closes the support holes 265 and 275 may be attached to the support bearings 26 and 27. Further, the support holes 265 and 275 may be provided with a slight air outlet without being completely closed.

Reference Signs List 1 camera device 3 prism driving device 8 lens driving device 9 lens body 10 housing 13 upper plate 15 rear plate 16 17 side plate 26 27 support bearing 30 prism 31 entrance surface 32 reflection surface 34 emission surface 36 37 side surface 40 holding member 41 solid Part 42 56 57 End face 43 Top face 45 Back face 46 47 Wall part 48 Support part 49 Support face 50 Support shaft 52 Second outer peripheral face 55 First outer peripheral face 61 Magnet 64 Coil 70 Leaf spring 73 Central part 76 77 Outside part 80 FPC
81 1st surface part 82 2nd surface part 83 recessed part 90 case 91 95 96 97 board 100 image sensor 151 731 opening 165 175 465 475 through hole 261 271 small diameter part 262 272 large diameter part 265 275 support hole 400 smartphone 424 depression dent depression 425 depression Part 432 Projection 561 571 Standing surface 760 770 Arm 761 771 First wire 762 772 Second wire 801 Frame 802 Lens carrier 911 951 Opening 912 952 Plate 941 Base

Claims (8)

A fixed part,
Holding member having a support portion for supporting the optical element,
A support shaft extending in a predetermined direction and supporting the holding member swingably with respect to the fixing portion;
A leaf spring extending in a plane including the predetermined direction and connecting the fixed portion and the holding member ,
The leaf spring is formed at both ends in the predetermined one direction and is attached to one of the fixed portion or the holding member, and the outer portion is formed at the center in the predetermined one direction and the fixed portion or the holding member. A central portion attached to the other, between each of the outer portions and the central portion, has a meandering shape, and has a plurality of arms connecting the outer portion and the central portion,
The outer portion and the central portion extend in another direction in the plane;
The leaf spring is characterized in that the outer portion and the central portion swing relatively in an arc shape about the support shaft, and deform while being twisted between the central portion and the outer portion. Device driving device. The optical element driving device according to claim 1, wherein the leaf spring extends in the plane including a thickness direction of the fixing portion. 2. The optical element driving device according to claim 1 , wherein the leaf spring is formed to be line-symmetric as a whole with the central portion as a symmetry axis. 3. One leaf spring piece between the one outer part and the central part and the other leaf spring piece between the other outer part and the central part are respectively the one direction and the other one. The optical element driving device according to claim 1 , wherein the optical element driving device is formed to be line-symmetric in one direction. One wire constituting the arm portion is formed by facing the European character "S" and its mirror character, and extending each end of the two characters facing the outside along the predetermined direction to form the central portion. and the lead to the outer part, according the ends facing inwardly to one of claims 1, 3 and 4, characterized in that it has a predetermined shape connecting stretched in one direction Optical element driving device. An opening is provided in the central portion, and a convex portion is provided in the holding member,
The optical element driving device according to claim 1, wherein the convex portion is fitted into an opening in the central portion.   A camera device comprising the optical element driving device according to claim 1.   An electronic apparatus comprising the camera device according to claim 7.