JP6710419B1 - Optical element driving device, camera device, and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical element driving device, a camera device, and an electronic device in which an optical member and a member supporting the optical member move along a supporting shaft and are hard to collide with other parts. A prism driving device (3) includes a support shaft (50) fixed to a holding member (40), and support bearings (26) and (27) that are fixed portions that support the support shaft (50) in swingable manner in support holes (265) and (275) thereof. , Are equipped. Further, the support shaft 50 is fitted from one end of the support holes 265 and 275 to the middle thereof, and the plates 96 and 97 of the case 90, which is a fixed portion, block 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. .. [Selection diagram] Fig. 5

Description

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

Some camera devices mounted on electronic devices such as smartphones have a prism for image blur correction and a member for swingably holding the image blur correction prism, and after the light from the subject is reflected by the prism, There is a configuration in which light is guided to the imaging surface. As a document disclosing a technique related to this type of camera device, there is Patent Document 1. The periphery type photographing module described in Patent Document 1 has a prism, a prism pedestal having a tapered surface on which the prism is mounted, 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 casing that supports both ends of a support shaft so as to be swingable. In this periphery type photographing module, the prism pedestal and the prisms on the supporting surface of the prism pedestal oscillate with the supporting shaft as the oscillating shaft by the driving force of the magnet and the coil.

China utility model CN205942054U bulletin

However, the support shaft in the periscopic photographing module of Patent Document 1 is fixed to support bearings fixed to both left and right side walls of the housing, and the prism pedestal and the prism are swingably supported with respect to the support shaft. It was that. Therefore, the prism pedestal and the prism may move toward the side wall of the housing along the support axis and collide with each other.

The present invention has been made in view of such a problem, and an optical element driving device, a camera device, and an optical member, which is a member that supports the optical member, is hard to move along the support shaft and collide with other portions, The purpose is to provide an electronic device.

In order to solve the above problems, an optical element driving device according to a preferred embodiment of the present invention includes a holding member having a supporting portion that supports an optical element, a support shaft fixed to the holding member, and the support shaft. A fixing portion that swingably supports in the supporting hole, the supporting shaft is fitted from one end of the supporting hole to a midpoint, and the other portion of the fixing portion is the other end of the supporting hole. It is characterized by blocking the side.

In this aspect, a resin material may be filled between the outer peripheral surface of the support shaft and the inner peripheral surface of the support hole.

The fixed body includes a housing having two side plates facing each other with a through hole, and a support bearing having the support hole, wherein the support bearing has a cylindrical small diameter portion and the small diameter portion. A large diameter portion having a cylindrical shape with a larger diameter, and a small diameter portion of the support bearing is inserted into and fixed to the through holes of the two side plates of the housing, and both ends of the support shaft are fixed. The part may be fitted from one end of the support hole of the support bearing to the middle thereof.

Further, the fixed body includes a case that has two plates facing each other with the housing sandwiched therebetween and covers the main body of the apparatus, and an end surface of the large diameter portion of the support bearing is in contact with each of the plates. The abutting portions of the two plates may block the support hole.

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

An electronic device according to another preferred aspect of the present invention includes the above camera device.

According to the present invention, the supporting shaft is fixed to the holding member, and the fixing portion that supports the supporting shaft in the supporting hole so that the supporting shaft can swing is provided. The supporting shaft is fitted from one end of the supporting hole to the middle thereof. The other part of the fixing part closes the other end of the support hole. The space between the support shaft and the fixed portion in the support hole of the fixed portion is in an airtight state, an air pool is formed in this space, and this air pool acts as an air spring. Therefore, even if the support shaft fixed to the holding member moves in the axial direction, it is difficult for the support shaft to collide with the portion of the fixed portion blocking the other end side of the support hole, and even if it collides, the impact is small Become. Therefore, according to the present invention, it is possible to provide the optical element driving device in which the optical element and the member supporting the optical element hardly move along the support shaft and collide with other portions.

1 is a front view of a smartphone 400 that is an electronic device equipped with a camera device 1 including a prism driving device 3 according to an embodiment of the present invention. 2 is a perspective view of a camera device 1 including the prism driving device 3 of FIG. 1. FIG. FIG. 3 is a sectional view taken along the line A-A′ of FIG. 2. It is the perspective view which looked at the camera apparatus 1 containing the prism drive device 3 of FIG. 2 from another viewpoint. 4A is a cross-sectional view taken along the line B-B′ in FIG. 4, and FIG. 4B is an enlarged view in the frame of FIG. FIG. 3 is an exploded perspective view of the prism driving device 3 of FIG. 2. 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. 6A is a view of the support shaft 50 of FIG. 6 viewed from the direction of arrow C, FIG. 6B is a view of the support shaft 50 of FIG. 6 viewed from the direction of arrow D, and FIG. 6 is a diagram showing a relationship between a second outer peripheral surface 52 and a reflecting surface 32 of the prism 30. FIG. FIG. 8 is a view of the leaf spring 70 of FIGS. 6 and 7 as seen from the direction of arrow E. 1A 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 FIG. It is a figure which shows the appearance of the 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 corner of the back surface of the housing of the smartphone 400. The camera device 1 includes a prism 30 and a lens body 9, which 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 through the prism 30 and the lens body 9. 100 and.

Hereinafter, the optical axis direction along the optical axis of the lens body 9 will be appropriately referred to as the X direction. Further, one direction orthogonal to the X direction and in which light from the subject enters 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 where the prism 30 is viewed in the X direction is referred to as an upper side, and the opposite side of the image sensor 100 side is referred to as a lower side. The side of the subject in the Z direction as viewed from the prism 30 is called the front side, and the opposite side is called the back side. Further, one of the Y directions may be referred to as the left side and the other as the right side. The Z direction is the thickness direction of the camera device 1, the prism driving device 3, and the lens driving 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 and the lens driving device 8 that holds the lens body 9, and the prism 30 and the prism driving device 3 that holds the prism 30 are arranged in the X direction and housed in a 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 other than 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 therethrough 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. When the plate 912 is attached to the opening 911, the prism 30 is exposed to the front side from the upper portion of the opening 911. A base 941 is fitted into the lower opening of the case 90. The image sensor 100 is fixed to the base 941 with the light receiving surface thereof facing the lens body 9. A case 10 of the prism driving device 3 described later is fitted 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. 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 biasing force of the X-direction spring or the Y-direction spring. Thus, the lens body 9 moves in the X direction or the Y direction. Focus adjustment can be performed by moving the lens body 9 in the X direction, and 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 supplied from the substrate of the smartphone 400. This enables camera shake correction in the Z direction. 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, and a support shaft 50. , And 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 serves to relay 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 the plate 95 on the rear side of the case 90 interposed between the first surface portion 81 and the second surface portion 82, and is housed inside the case 90. That is, the FPC 80 is attached to the case 90 such that the rear plate 95 of the case 90 is sandwiched by the first surface 81 and the second surface 82 from both sides in the Z direction.

At a corner of the front surface of the first surface portion 81 of the FPC 80, a recessed portion 83 recessed to the rear side is provided. The coil 64 is fixed to the first surface portion 81 of the FPC 80. The coil 64 has two linear portions extending in the X direction and two semicircular portions connecting these linear portions. One of the two semi-circular portions of the coil 64 straddles the recess 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 pulled out to the outside of the coil 64 via the recess 83 and connected to the first surface 81 of the FPC 80. It

The casing 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, through holes 165 and 175 having a perfect circular shape are formed. A concave portion extending in the Z direction is provided in the central rear portion of the upper plate 13, and a convex portion 431 of the holding member 40 described later is accommodated in this concave portion. The rear plate 15 has an opening 151 for accommodating the coil 64. 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 and fixed to the through hole 175.

The support bearings 26 and 27 are interposed between the through holes 165 and 175 and the support shaft 50, support the support shaft 50 in the support holes 265 and 275 so as to be swingable, 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. .. The support bearings 26 and 27 are provided with support holes 265 and 275 at their centers, respectively. The support hole 265 penetrates between both end surfaces of the support bearing 26, and the support hole 275 penetrates 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.

A housing in which the prism 30, the holding member 40, and the support shaft 50 are integrated is housed 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 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 exit surface 34. Light that has entered the incident surface 31 of the prism 30 from the subject is reflected by the reflecting surface 32, and is 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 like a rectangular parallelepiped extending in the Y direction, with a triangular prism-shaped portion occupying substantially half thereof cut out. 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 the right-angled isosceles triangular shape from the end portion of the solid portion 41 in the Y direction and facing each other 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 boundary portions between the wall portions 46 and 47 and the solid portion 41, respectively.

As shown in FIG. 6, the end face 42 facing the lower front direction corresponding to the bottom of the right triangle in the solid portion 41 of the holding member 40 is a tapered surface inclined by about 45 degrees with respect to the XY plane and the YZ plane. It has become. On the end surface 42, semicircular support portions 48 that are slightly raised from the end surface 42 are provided at positions separated from each other at the boundary portions with the wall portions 46 and 47. The support portion 48 is for mounting the prism 30. The tips of the four supporting portions 48 form a supporting surface 49, and the supporting surface 49 coincides with the reflecting 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 to each other, and the end surface 42 does not project beyond the support surface 49.

On the end surface 42 of the solid portion 41, there is a recess 425 that is hollowed 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 the recess 425 of the solid portion 41. The through holes 465 and 475 and the recessed portion 425 are provided substantially at the center of the end surface 42. A support shaft 50 described later is housed 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 stepwise recessed 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 solid portion 42 has a rear surface 45 provided with a recess for accommodating and fixing the magnet 61. The magnet 61 is a member that functions as a drive unit that drives the holding member 40 together with the coil 64. 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 in the Y direction on the upper surface 43 of the solid portion 41 projects 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 FIG. 8(A) and FIG. 8(B), the support shaft 50 has a shape that is cut out from a slender cylindrical shape, leaving a portion occupying the center in the extending direction in a semi-cylindrical shape. There is. 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 distance between the walls 46 and 47 of the holding member 40 facing in the Y direction and shorter than the distance between the plates 96 and 97 of the case 90 facing 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 an axis AXS passing through the center O of the cylindrical shape. 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 cylindrical outer peripheral surface, and is provided at a position notched beyond the axis AXS. Boundaries between the second outer peripheral surface 52 and the standing surfaces 571 and 561 at both ends thereof are gently curved. As shown in FIG. 8(C), the prism 30 is arranged so as to be located within a notched position beyond the axis AXS.

The support shaft 50 is supported so that the second outer peripheral surface 52 thereof is oriented in the normal line direction of the end surface 42 of the holding member 40 and the central portion thereof is fitted into the recess 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 end of the support holes 265 and 275 of the support bearings 26 and 27 to the middle. The center O of the cylindrical 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 with each other.

As shown in FIG. 5B, the inner surface of the plate 96 of the case 90 and the inner surface of the plate 97 are opposed to 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 other end 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 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 configured by 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 of the holding member 40 or the recess 425. .. 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. Are filled, and the holding member 40 and the support shaft 50 are fixed. Thereby, the holding member 40, the prism 30, and the support shaft 50 are integrated.

When viewed from the Y direction in which the holding member 40, the prism 30 and the support shaft 50 are integrated, the center O of the first outer peripheral surface 55 of the support shaft 50 has 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 with respect to 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, 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. 8C. 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 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 portion of the support shaft 50 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 are formed. A resin having viscoelasticity is filled 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. A damper gel is also provided on the end surfaces 56 and 57 of the support shaft 50. With this damper gel, it is possible to quickly converge the vibration generated in the integrated holding member 40, prism 30, and support shaft 50 by being supported by the leaf spring 70. Further, the damper gel is easy to maintain its shape with respect to a normal so-called liquid lubricant, and it is easy to maintain the support shaft 50 at the center position of the support holes 265 and 275. In addition, the space between the end surfaces 56 and 57 of the support shaft 50 and the plates 96 and 97 of the case 90, which is the fixed portion, in the support holes 265 and 275 is airtight. 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 that is a fixed portion and the holding member 40 to each other and that restricts the movement of the integrated holding member 40, the prism 30, and 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 thickness direction of the housing 10 which is the direction in which the support shaft 50 extends and 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 arm portions 760 connecting the outer portions 76 and 77 and the central portion 73. 770 and. Each of the two arms 760 and 770 has a serpentine shape. The outer side portion 76, the center portion 73, and the outer side portion 77 are formed in a line 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 includes a first wire 761 connecting the front ends of the central portion 73 and the outer portion 76, and a second wire 762 connecting the rear ends of the central portion 73 and the outer portion 76. The arm portion 770 has a first wire 771 connecting the front end portions of the central portion 73 and the outer portion 77, and a second wire 772 connecting the rear end portions 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 letter "S" and its mirror character, and extend the ends of the two characters facing outwards along the Y direction to the central part. It has a shape such that it is connected to the end portions of the outer peripheral portion 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 attached in a state of keeping a substantially flat plate. The leaf spring 70 holds the holding member 40 in the housing 10 such that the upper surface 43 of the holding member 40 is in a position facing the upper plate 13 of the housing 10 in parallel (hereinafter, this position is referred to as an initial position). Be done.

In FIG. 3, when a current flows from the FPC 80 to the coil 64, an electromagnetic action between the coil 64 and the magnet 61 generates a driving force in the X direction on the magnet 61. Since the magnet 61 is arranged so as to be displaced to the rear side in the Z direction with respect to the support shaft 50, when the driving force in the lower side in the X direction is generated in the magnet 61, the holding member 40 and the prism 30 held therein. Rotates counterclockwise about 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 are reached to a position where the driving force generated in the magnet 61 and the biasing force due to the deformation of the leaf spring 70 are balanced. , And the support shaft 50 are integrated to rotate. As a result, the light emitted from the prism 30 is emitted 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 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 rotate in the clockwise direction and returns to the initial position.

When a current in the opposite direction is applied to the coil 64, the magnet 61 generates a driving force on the upper side in the X direction, and the prism 30, the holding member 40, and the support shaft 50 are moved to a position where the driving force and the biasing 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 that are integrated rotate in the counterclockwise direction 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, when the support shaft 50 swings about the center of the leaf spring 70, The portion 73 relatively moves in the front-rear direction with respect to the outer portions 76 and 77. At this time, strictly, 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 this embodiment, the following effects can be obtained.
In the present embodiment, both ends of the support shaft 50 that are fitted into the support holes 265 and 275 have a cylindrical shape, and the central portion is flush with the cylindrical outer peripheral surface along the cylindrical axis AXS. It has a first outer peripheral surface 55 and a second outer peripheral surface 52 that is inside the outer peripheral surface of the cylindrical 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 reflecting 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 that is the swing shaft. Therefore, according to the present embodiment, it is possible to provide the prism driving device 3 which requires a small space for swinging and can be easily downsized.

Further, in this embodiment, a support shaft 50 that supports the holding member 40 with respect to the housing 10 in a swingable manner, 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 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, the support shaft 50 that supports the holding member 40, and the fixed portion that is disposed at the positions of both ends of the support shaft 50 and that supports the support shaft 50 within the support holes 265 and 275 so as to be swingable. Support bearings 26 and 27 as 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 drive device 3 in which the impact is hard to be transmitted to the prism 30 even if the 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 that are the fixed portions that support the support shaft 50 in the support holes 265 and 275 so as to be swingable are provided. ing. The support shaft 50 is fitted from one end of the support holes 265 and 275 to the middle thereof, and the plates 96 and 97 of the case 90, which is a fixed portion, block 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 they collide, the impact will be 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 is a member that supports the prism 30, and the support shaft 50 do not easily move along the support shaft 50 and collide with other portions. You can

In the present 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 two side plates 16 and 17 of the housing 10 and the through holes 165 and 175 at the center thereof are made thicker in the Y direction, and the diameters of the through holes 165 and 175 are made slightly thicker than the diameter of the support shaft 50 to allow penetration. Both ends of the support shaft 50 are inserted into the holes 165 and 175, a resin having viscoelasticity is filled between the inner peripheral surface of the through holes 165 and 175 and the outer peripheral surface of the support shaft 50, and The outer surface may be brought into contact with the inner surfaces of the plates 96 and 97 of the case 90 to close the through holes 165 and 175.

Further, in the present embodiment, the leaf spring 70 is provided along the extending direction of the support shaft 50, that is, along the thickness direction of the housing 10 if provided so as to extend in a plane including the Y direction. It does not have to be provided. For example, it may be provided so as to extend in a direction parallel to the end surface 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 do not have to be the plates 96 and 97 of the case 90. For example, a member that simply blocks the support holes 265 and 275 may be attached to the support bearings 26 and 27. Moreover, the support holes 265 and 275 may be provided with a slight air escape port without being completely closed.

DESCRIPTION OF SYMBOLS 1 camera device 3 prism drive device 8 lens drive device 9 lens body 10 housing 13 upper plate 15 rear plate 16 17 side plate 26 27 support bearing 30 prism 31 incident 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 Rear face 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 part 82 2nd surface part 83 Recessed part 90 Case 91 95 95 96 97 Plate 100 Image sensor 151 731 Opening 165 175 465 475 Through hole 261 271 Small diameter part 262 272 Large diameter part 265 275 Recessed hole 400 Smartphone 424 Recess 1 43 425 Part 432 Protrusion 561 571 Standing surface 760 770 Arm part 761 771 First wire 762 772 Second wire 801 Frame body 802 Lens carrier 911 951 Opening 912 952 Plate 941 Base

Claims (5)

A holding member having a supporting portion for supporting the optical element,
A support shaft fixed to the holding member,
A fixed portion that supports the support shaft in a swingable manner within the support hole;
Equipped with
The support shaft is fitted from one end of the support hole to the middle thereof, and the other part of the fixing portion closes the other end side of the support hole,
A resin material is filled between the outer peripheral surface of the support shaft and the inner peripheral surface of the support hole ,
The optical element driving device , wherein the resin material is provided so as to wrap around from the outer peripheral surface of the support shaft to the entire end surface of the support shaft facing the other part of the fixing portion. The fixed portion includes a housing having two side plates facing each other with a through hole, and a support bearing having the support hole,
The support bearing has a cylindrical small-diameter portion and a cylindrical large-diameter portion having a diameter larger than the small-diameter portion,
The small diameter portion of the support bearing is inserted into and fixed to the through holes of the two side plates of the housing,
The optical element drive device according to claim 1, wherein both end portions of the support shaft are fitted from one end of the support hole of the support bearing to a midpoint thereof. The fixing portion includes a case that has two plates facing each other with the housing interposed therebetween and covers the apparatus main body.
The end surface of the large diameter portion of the support bearing is in contact with each of the plates, and the contact portions of the two plates close the support hole. Device driving device. A camera device comprising the optical element driving device according to claim 1. An electronic device comprising the camera device according to claim 4.