JP2020190651A - Optical element drive device, camera device and electronic apparatus - Google Patents

Abstract

To provide an optical element drive device capable of returning an optical element to be mounted to an initial position easily, a camera device, and an electronic apparatus.SOLUTION: A prism drive device 3 comprises a support shaft 50 that swingably supports a holding member 40 with respect to a housing 10, and a leaf spring 70 that connects the housing 10 and the holding member 40. The leaf spring 70 is provided so as to extend in a YZ plane which is a plane including a Y direction in which the support shaft 50 extends. Therefore, the holding member 40 supporting a prism 30 can be easily returned to an initial position by the elastic force of the leaf spring 70.SELECTED DRAWING: Figure 10

Description

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

Some camera devices mounted on electronic devices such as smartphones have a prism for image blur correction and a member that holds it swingably, and after the light from the subject is reflected by the prism, the camera Some are configured to guide light to the imaging surface. Patent Document 1 is a document that discloses a technique related to this type of camera device. The latent imaging module described in Patent Document 1 has a prism, a prism pedestal having a tapered surface on which the prism is placed, a support shaft inserted into a shaft hole of the prism pedestal, and a driving force of the prism pedestal. It has a magnet and a coil to be produced, and a housing that swingably supports both ends of the support shaft. In this latent imaging module, the prism pedestal and the prism on the support surface thereof swing with the support shaft as the swing shaft by the driving force of the magnet and the coil.

China Utility Model CN205942054U Gazette

However, in the latent imaging 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 placed, and the coil and the magnetic yoke are arranged at positions facing the magnet in the housing. It was composed. Therefore, there is a problem that it is 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 capable of easily returning the mounted optical element to an initial position. To do.

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

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

Further, the leaf spring is formed at both ends of the predetermined one direction and attached to one of the fixing portion or the holding member, and the leaf spring is formed at the center of the predetermined one direction and the fixing portion or the said. It has a central portion attached to the other side of the holding member, and a plurality of arms having a winding shape and connecting the outer portion and the central portion, and the outer portion and the central portion are other in the plane. It may extend in one direction.

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

Further, one leaf spring piece between the outer side portion and the central portion and the other leaf spring piece between the outer side portion and the central portion of the other portion are in the predetermined one direction and the central portion, respectively. It may be formed line-symmetrically in the other direction.

In addition, one wire constituting the arm portion faces the European letter "S" and its mirror writing, and each end portion facing the outside of the two letters is extended along the predetermined one direction. It may have a shape in which the central portion and the outer portion are connected, and the end portions facing inward are extended and connected along the predetermined one direction.

Another preferred embodiment of the present invention is a camera device including the above-mentioned optical element driving device.

Another preferred embodiment of the present invention is an electronic device including the above-mentioned camera device.

In the present invention, a support shaft that swingably supports the holding member with respect to the fixing portion and a leaf spring that connects the fixing portion and the holding member are provided, and the leaf spring has a predetermined support shaft extending. It extends over a plane including one direction. Therefore, the holding member supporting the optical element can be easily returned 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.

It is a front view of the smartphone 400 which is an electronic device equipped with the camera device 1 including the prism drive device 3 which is one Embodiment of this invention. It is a perspective view of the camera device 1 including the prism driving device 3 of FIG. FIG. 2 is a cross-sectional view taken along the line AA'of FIG. It is a perspective view which looked at the camera apparatus 1 including the prism driving apparatus 3 of FIG. 2 from another viewpoint. (A) is a sectional view taken along line BB'of FIG. 4, and (B) is an enlarged view within the frame of (A). It is a perspective view which disassembled the prism driving device 3 of FIG. 6 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 as viewed from another viewpoint. (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). It is a figure which shows the relationship between the 2nd outer peripheral surface 52 and the reflection surface 32 of a prism 30. 6 is a view of the leaf spring 70 of FIGS. 6 and 7 as viewed from the direction of arrow E. (A) is a view showing the 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 view showing the state of the leaf spring 70 when the holding member 40 is swung in the opposite direction. It is a figure which shows the state of the leaf spring 70 when it is 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 the back corner of the housing of the smartphone 400. The camera device 1 is an image sensor that photoelectrically converts light guided from a subject through the prism 30 and the lens body 9, the prism 30 and the lens body 9, which are optical elements, the prism drive device 3, the lens drive device 8, and the subject. It has 100 and.

Hereinafter, the direction of the optical axis along the optical axis of the lens body 9 is appropriately referred to as the X direction. Further, one direction orthogonal to the X direction and incident light from the subject onto the prism 30 is appropriately referred to as the Z direction, and a direction orthogonal to both the X direction and the Z direction is appropriately referred to as the Y direction. Further, the side of the prism 30 in the X direction when viewed from the lens body 9 is referred to as the upper side, and the side opposite to the prism 30 is referred to as the lower side. Further, the side of the subject in the Z direction as viewed from the prism 30 is referred to as the front side, and the opposite side thereof is referred to as the rear side. Further, one 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 the thickness direction of the camera device 1, the prism drive device 3, and the lens drive device 8, and is the thickness direction of the 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, the lens driving device 8 that holds the lens body 9, the prism 30, and the prism driving device 3 that holds the prism 30 are arranged in the X direction and housed in the space inside the case 90. 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 plate 91 on the front side of the case 90 has an opening 911, and the plate 95 on the rear side 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 to cover the lens body 9 from the front and back. With the plate 912 mounted on the opening 911, the prism 30 is exposed to the front side from the upper portion of the opening 911. The base 941 is fitted into the opening on the lower side of the case 90. An image sensor 100 is fixed to the base 941 with its light receiving surface facing the lens body 9. Further, the housing 10 of the prism driving device 3 described later is fitted and exposed in the opening on the upper side 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 given 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. It has a drive magnet and a Y-direction drive coil (not shown). When a current is supplied to the X-direction drive coil or the Y-direction drive coil of the lens drive device 8, an electromagnetic force is generated in the X-direction drive coil or the Y-direction drive coil to resist the urging force of the X-direction spring or the Y-direction spring. Therefore, 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 correction in the Y direction can be performed 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 given from the substrate of the smartphone 400. As a result, camera shake correction in the Z direction can be performed. As shown in FIGS. 6 and 7, the prism drive device 3 includes an FPC (Flexible Printed Circuits) 80, a coil 64, a housing 10, support bearings 26 and 27, a holding member 40, and a support shaft 50. , With 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 fixed portion.

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

A recess 83 recessed on the rear side is provided in one corner of the front surface of the first surface portion 81 of the FPC 80. A coil 64 is fixed to the first surface portion 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 recess 83. The outer portion of the recess 83 is on the outside of the coil 64 and the inner portion is on the inside of 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 pulled out of the coil 64 through the recess 83 and connected to the first surface 81 of the FPC 80. To.

The housing 10 is located in the case 90 at a position 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 in the Y direction, and an upper plate 13 and a rear plate 15 interposed between the two side plates 16 and 17. Circular through holes 165 and 175 are bored in the middle of each of the two side plates 16 and 17. A concave portion extending in the Z direction is provided in the central rear portion of the upper plate 13, and the convex portion 431 of the holding member 40 described later is accommodated in this concave portion. The rear plate 15 is provided with an opening 151 in which the coil 64 is housed. 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 into the through hole 175 and fixed.

The support bearings 26 and 27 are interposed between the through holes 165 and 175 and the support shaft 50, and swingably support the support shaft 50 in the support holes 265 and 275 to assist the swing of the support shaft 50. It is a member to be bearing. The support bearings 26 and 27 have columnar small diameter portions 261 and 271 having substantially the same diameter as the through holes 165 and 175 and columnar large diameter portions 262 and 272 having a diameter slightly larger than this. .. Support holes 265 and 275 are bored in the centers of the support bearings 26 and 27, respectively. The support hole 265 penetrates between both end faces of the support bearing 26, and the support hole 275 penetrates between both end faces of the support bearing 27. In the support bearings 26 and 27, the small diameter portions 261 and 271 are inserted into the through holes 165 and 175 and fixed to the housing 10.

A prism 30, a holding member 40, and a support shaft 50 are integrated in the housing 10, and the holding member 40 is supported by the housing 10 via a leaf spring 70. The prism 30 has an incident surface 31, a reflecting surface 32, an emitting 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 incident surface 31 of the prism 30 from the subject is reflected by the reflecting surface 32 and guided to the lens body 9 via the emitting surface 34.

The holding member 40 is a member that plays a role of holding the prism 30. The holding member 40 has a shape such that a triangular columnar portion occupying approximately half of the rectangular parallelepiped extending in the Y direction is cut out. That is, the holding member 40 has a right-angled isosceles triangular columnar solid portion 41 and two wall portions that extend in a right-angled isosceles triangle shape from the end of the solid portion 41 in the Y direction and face each other in the Y direction. It has 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 the boundary portions of the wall portions 46 and 47 with the solid portion 41, respectively.

As shown in FIG. 6, the end surface 42 facing the front lower side, which corresponds to the base of the right triangle in the solid portion 41 of the holding member 40, is a tapered surface inclined by approximately 45 degrees with respect to the XY surface and the YZ surface. It has become. On the end face 42, semicircular support portions 48 slightly raised from the end face 42 are provided at positions of the boundary portions with the wall portions 46 and 47 apart from each other. The support portion 48 is for mounting the prism 30. The tips of the four support portions 48 form a support surface 49, which 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 face 42 of the solid portion 41 has a recess 425 cut out in a semicircular shape. When viewed from the Y direction, the through hole 465 of the wall portion 46 and the through hole 475 of the wall portion 47 overlap with the recess 425 of the solid portion 41. The through holes 465 and 475 and the recess 425 are provided substantially in the center of the end face 42. A support shaft 50, which will be described later, is accommodated and fixed in the through holes 465 and 475 and the recess 425. Further, the end surface 42 is provided with four recesses 424, each of which is recessed in a stepped shape so that the weight around the support shaft 50 is balanced when the prism 30 is attached.

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

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

Both ends of the support shaft 50 have a cylindrical shape. 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 outer peripheral surface of the cylinder at both ends along the axis AXS passing through the center O of the cylinder. The center of the first outer peripheral surface 55 is at the same position as the axis AXS. The second outer peripheral surface 52 is substantially flat. The second outer peripheral surface 52 is inside the cylindrical outer peripheral surface, and is provided at a position notched beyond the axis AXS. The boundary between the second outer peripheral surface 52 and the upright surfaces 571 and 561 at both ends thereof is gently curved. As shown in FIG. 8C, the prism 30 is arranged so as to be within the notched position beyond the axis AXS.

The support shaft 50 is supported so that its central portion fits into the recess 425 of the holding member 40 so that the second outer peripheral surface 52 faces the normal direction of the end surface 42 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 halfway from one end of the support holes 265 and 275 of the support bearings 26 and 27. The cylindrical centers O at both ends of the support shaft 50 coincide with the centers of the through holes 465 and 475 of the holding member 40.

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 close the support hole 265 of the support bearing 26 and the other end side of 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 wall portions 46 and 47 of the holding member 40 are adhesively fixed. Further, 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 recess 425 of the holding member 40. .. Adhesive 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. As a result, 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 the support surface 49 of the holding member 40 and the prism 30. It is on the reflective surface 32, and the entire second outer peripheral surface 52 is on the first outer peripheral surface 55 side of the support surface 49 and the reflective surface 32. That is, since it is assembled so as to be parallel to the end surface 42, as shown in FIG. 8C, the second outer peripheral surface 52 is less than the height of the support surface 49 of the holding member 40, and the reflective surface 32. 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 less than the height of the support surface 49 of the holding member 40. As a result, 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. 5B, in the portions of the support shaft 50 that are fitted into 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 A resin having viscoelasticity is filled between the space and between the outer peripheral surface of the support shaft 50 and the inner peripheral surface of the support hole 275. The resin having viscoelasticity is a so-called damper gel. Damper gels are also provided on the end faces 56 and 57 of the support shaft 50. With this damper gel, the vibration generated in the holding member 40, the prism 30, and the support shaft 50 integrated by being supported by the leaf spring 70 can be quickly converged. Further, the damper gel can easily maintain its 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 space between the end faces 56 and 57 of the support shaft 50 and the plates 96 and 97 of the case 90 which are fixed portions in the support holes 265 and 275 becomes airtight. Further, the holding member 40, the prism 30, and the holding member 40 integrated with each other can swing with respect to the housing 10.

The leaf spring 70 is a member that connects the housing 10 which is a fixing portion and the holding member 40 and integrates the holding member 40, the prism 30, and the holding member 40 to regulate the movement of the holding member 40. The leaf spring 70 is provided so as to extend in the YZ plane, that is, so as to extend in the extending direction of the support shaft 50 and the thickness direction of the housing 10, which is the thickness direction of the fixed body. ing. That is, the leaf spring 70 is provided along the stacking direction of the coil 64 and the magnet 61 so as not to overlap 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 in the center, and an arm portion 760 connecting the outer portions 76 and 77 and the central portion 73. It has 770 and. Each of the two arms 760 and 770 has a winding shape. The outer portion 76, the central portion 73, and the outer portion 77 are formed so as to be arranged in the Y direction so as to extend in the Z direction, respectively. For convenience, the portion having the outer portion 76, the central portion 73, and the arm portion 760 and the portion having the outer portion 77, the central portion 73, and the arm portion 770 are referred to as leaf spring pieces, respectively. 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 body as a whole, and the central portion 73 and the outer portions 76 and 77 are also flat plate bodies. 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 convex portion 431 of the holding member 40. The arm portion 760 has a first wire 761 that connects the front ends of the central portion 73 and the outer portion 76, and a second wire 762 that connects the rear ends of the central portion 73 and the outer portion 76. The arm portion 770 has a first wire 771 that connects the front ends of the central portion 73 and the outer portion 77, and a second wire 772 that connects the rear ends of the central portion 73 and the outer portion 77. ..

The first wires 761 and 771 and the second wires 762 and 772 face the European letter "S" and its mirror writing, and each end facing the outside of the two letters is extended along the Y direction to the central portion. It has a shape that is connected to the ends of 73 and the outer portions 76 and 77, and the end portions facing inward are extended and connected along the Y direction.

The leaf spring 70 is fixed to the holding member 40 by fitting the convex portion 431 of the holding member 40 into the opening 731. The outer portions 76 and 77 of the leaf spring 70 are fixed to the protrusions 432 at the intersections of the side plates 16 and 17 of the housing 10 and the upper plate 13. The leaf spring 70 is mounted while keeping a substantially flat plate. The leaf spring 70 holds the holding member 40 in the housing 10 so that the upper surface 43 thereof faces the upper plate 13 of the housing 10 in parallel (hereinafter, this position is referred to as an initial position). Is done.

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 the electromagnetic action between the coil 64 and the magnet 61. Since the magnet 61 is arranged so as to be displaced rearward in the Z direction with respect to the support shaft 50, when a driving force on the lower side in the X direction is generated on the magnet 61, the holding member 40 and the prism 30 held therein are generated. Rotates counterclockwise around the support shaft 50. At that 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 reach a position where the driving force generated in the magnet 61 and the urging force due to the deformation of the leaf spring 70 are balanced. , And the one in which the support shaft 50 is integrated rotates. As a result, the emitted light from the prism 30 is emitted in a direction rotated counterclockwise with respect to the emitted light 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 restoring force of the leaf spring 70 causes the prism 30, the holding member 40, and the support shaft 50 to be integrated to rotate clockwise and return to the initial position.

When a current in the opposite direction is passed through the coil 64, a driving force on the upper side 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 emitted light from the prism 30 is emitted in a direction rotated clockwise with respect to the emitted light 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 integrated with each other rotate counterclockwise and return 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 shaft, the center of the leaf spring 70. The portion 73 moves relative to the outer portions 76 and 77 in the front-rear direction. Strictly speaking, at this time, the central portion 73 of the leaf spring 70 swings in an arc shape about 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 this embodiment. According to this embodiment, the following effects can be obtained.
In the present embodiment, the support shaft 50 has a cylindrical shape at both ends to be fitted into the support holes 265 and 275, and the central portion is flush with the outer peripheral surface of the cylindrical shape along the cylindrical axis AXS. It has one outer peripheral surface 55 and a second outer peripheral surface 52 inside the cylindrical outer peripheral surface. 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 mounted on the support surface 49 can be aligned 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 miniaturize.

Further, in the present embodiment, a support shaft 50 that swingably supports the holding member 40 with respect to the housing 10 and a leaf spring 70 that connects the housing 10 and the holding member 40 are provided. The leaf spring 70 is provided so as to extend in the YZ plane which is a plane including the Y direction in which the support shaft 50 extends. Therefore, the holding member 40 that supports the prism 30 can be easily returned 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 capable of easily returning the mounted prism 30 to the initial position.

Further, in the present embodiment, the support shaft 50 that supports the holding member 40 and the fixing portion that is arranged at the positions of both ends of the support shaft 50 and swingably supports the support shaft 50 in the support holes 265 and 275. Support bearings 26 and 27 as the above. A resin having viscoelasticity is filled between the outer peripheral surface of the support shaft 50 and the inner peripheral surface in the support holes 265 and 275 of the support bearings 26 and 27. Due to this resin, the impact is not easily 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 not easily transmitted to the prism 30 even if an impact is applied.

Further, in the present embodiment, the support shaft 50 fixed to the holding member 40 and the support bearings 26 and 27 which are the fixing portions for swingably supporting the support shaft 50 in the support holes 265 and 275 are provided. 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, close the other ends 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 an air pool 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 collides, the impact is small. Therefore, according to the present embodiment, there is provided a prism driving device 3 in which the prism 30, the holding member 40 which is a member supporting the prism 30, and the support shaft 50 move along the support shaft 50 and do not easily collide with other portions. Can be done.

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 in the Y direction is increased, and the diameters of the through holes 165 and 175 are made slightly thicker than the diameter of the support shaft 50 to penetrate. 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 to form the side plates 16 and 17. The outer side surface may be 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.

Further, in the present embodiment, if the leaf spring 70 is provided along the extending direction of the support shaft 50, that is, extending along the plane including the Y direction, the leaf spring 70 is provided along the thickness direction of the housing 10. It does not have to be provided. For example, it may be provided so as to extend in a direction parallel to the end face 42. Even in this case, the central portion 73 and the outer portions 76 and 77 of the leaf spring 70 are always provided so as to be aligned in the Y direction.

Further, in the present embodiment, the members that close 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 escape port without being completely closed.

1 Camera device 3 Prism drive device 8 Lens drive device 9 Lens body 10 Housing 13 Top plate 15 Rear plate 16 17 Side plate 26 27 Support bearing 30 Prism 31 Incident surface 32 Reflection surface 34 Exit surface 36 37 Side surface 40 Holding member 41 Solid Part 42 56 57 End face 43 Top surface 45 Rear surface 46 47 Wall part 48 Support part 49 Support surface 50 Support shaft 52 Second outer peripheral surface 55 First outer peripheral surface 61 Magnet 64 Coil 70 Leaf spring 73 Central part 76 77 Outer part 80 FPC
81 1st surface 82 2nd surface 83 Concave 90 Case 91 95 96 97 Plate 100 Image sensor 151 731 Aperture 165 175 465 475 Through hole 261 271 Small diameter 262 272 Large diameter 265 275 Support hole 400 Smartphone 424 Recess 43 Concave Part 432 Protrusion 561 571 Erecting surface 760 770 Arm part 761 771 First wire 762 772 Second wire 801 Frame 802 Lens carrier 911 951 Aperture 912 952 Plate 941 Base

Claims (8)

Fixed part and
A holding member having a support portion for supporting the optical element and
A support shaft extending in a predetermined direction to swingably support the holding member with respect to the fixing portion,
A leaf spring extending in a plane including the predetermined one direction and connecting the fixing portion and the holding member,
An optical element drive device characterized by being equipped with. The optical element driving device according to claim 1, wherein the leaf spring extends in the plane including the thickness direction of the fixed portion. The leaf spring is formed at both ends in the predetermined one direction and attached to one of the fixing portion or the holding member, and the leaf spring is formed in the center of the predetermined one direction and the fixing portion or the holding member. It has a central portion attached to the other side of the body and a plurality of arms having a winding shape and connecting the outer portion and the central portion.
The optical element driving device according to claim 1, wherein the outer portion and the central portion extend in another direction in the plane. The optical element driving device according to claim 3, wherein the leaf spring is formed in line symmetry as a whole with the central portion as a symmetric axis. One leaf spring piece between the outer side and the central part and the other leaf spring piece between the outer side and the central part of the other are the predetermined one direction and the other, respectively. The optical element driving device according to claim 3, wherein the optical element driving device is formed line-symmetrically in one direction. One wire constituting the arm portion faces the European letter "S" and its mirror letter, and each end portion facing the outside of the two letters is extended along the predetermined one direction to form the central portion. The optical element according to any one of claims 3 to 5, wherein the optical element is connected to the outer side portion, and the end portions facing inward are extended and connected along the predetermined one direction. Drive device. A camera device including the optical element driving device according to claim 1. An electronic device including the camera device according to claim 7.