US20220137318A1 - Optical Element Driving Device, Camera Device and Electronic Apparatus - Google Patents
Optical Element Driving Device, Camera Device and Electronic Apparatus Download PDFInfo
- Publication number
- US20220137318A1 US20220137318A1 US17/577,840 US202217577840A US2022137318A1 US 20220137318 A1 US20220137318 A1 US 20220137318A1 US 202217577840 A US202217577840 A US 202217577840A US 2022137318 A1 US2022137318 A1 US 2022137318A1
- Authority
- US
- United States
- Prior art keywords
- supporting
- optical element
- peripheral surface
- driving device
- supporting shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims abstract description 69
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 230000010354 integration Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/1805—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for prisms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0875—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements
- G02B26/0883—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements the refracting element being a prism
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
- G02B23/08—Periscopes
Definitions
- the present disclosure relates to an optical element driving device, a camera device and an electronic apparatus used in electronic apparatus such as smartphones.
- a camera device mounted in an electronic apparatus such as a smartphone has a prism for correcting image blur and a member holding the prism in a rockable manner, and has a configuration in which light from a subject is guided to an imaging surface of the camera after being reflected by the prism.
- Citem Document 1 Chinese utility model CN205942054U (hereinafter referred to as “Patent Document 1” may be picked up.
- a periscopic imaging module described in Patent Document 1 has a prism, a prism pedestal having a tapered surface on which the prism is placed, a supporting shaft inserted into the shaft hole of the prism pedestal, a magnet and a coil generating a driving force of the prism pedestal, and a housing supporting two ends of the supporting shaft in a rockable manner.
- the prism pedestal and the prism on the supporting surface of the prism pedestal are rocked with the supporting shaft as a rocking shaft by the driving force of the magnet and the coil.
- the present disclosure has been made in view of such problem, and an object thereof is to provide an optical element driving device, a camera device and an electronic apparatus requiring a small space for rocking and easy to be miniaturized.
- an optical element driving device include: a fixed portion having supporting holes; a holding member having a supporting surface formed by a supporting portion supporting an optical element; and a supporting shaft supporting the holding member in a rockable manner with respect to the fixed portion.
- the supporting shaft has two end portions of cylindrical shape to be fitted into the supporting holes, and a center portion having a first outer peripheral surface and a second outer peripheral surface.
- the first outer peripheral surface is flush with an outer peripheral surface of the cylindrical shape along an axis line of the cylindrical shape, and the second outer peripheral surface is located further inside than the first outer peripheral surface.
- the center of the first outer peripheral surface is on the supporting surface, and the entire second outer peripheral surface is closer to the first outer peripheral surface than the supporting surface.
- a camera device including the optical element driving device described above.
- an electronic apparatus including the camera device described above.
- FIG. 1 is a front view of a smartphone 400 which is an electronic apparatus mounted with a camera device 1 including a prism driving device 3 according to one embodiment of the present disclosure.
- FIG. 2 is a perspective view of the camera device 1 including the prism driving device 3 of FIG. 1 .
- FIG. 3 is a cross-sectional view taken along line A-A′ of FIG. 2 .
- FIG. 4 is a perspective view of the camera device including the prism driving device 3 of FIG. 2 as viewed from another viewpoint.
- FIG. 5A is a cross-sectional view taken along line B-B′ of FIG. 4 .
- FIG. 5 B is an enlarged view inside the frame of FIG. 5A .
- FIG. 6 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 supporting bearings ( 26 , 27 ), the holding member 40 , the supporting shaft 50 , the magnet 61 , the plate spring 40 , and the prism 30 of FIG. 6 as viewed from another viewpoint.
- FIG. 8A is a view of the supporting shaft 50 of FIG. 6 as viewed from the direction of arrow C.
- FIG. 8B is a view of FIG. 8A as viewed from the direction of arrow D.
- FIG. 8C is a view showing the relationship between the second outer peripheral surface 52 of the supporting shaft 50 of FIG. 8A and the reflecting surface 32 of the prism 30 .
- FIG. 9 is a view of the plate spring 70 of FIG. 6 and FIG. 7 as viewed from the direction of arrow E.
- FIG. 10A is a view showing an appearance of the plate spring 70 when the holding member 40 of the prism driving device 3 of FIG. 1 is rocked in the counterclockwise direction.
- FIG. 10B is a view showing an appearance of the plate 40 spring when the holding member 40 is rocked in the reverse direction.
- the camera device 1 is embedded in the corner on the rear surface of the housing of the smartphone 400 .
- the camera device 1 has a prism 30 and lens body 9 as an optical element, a prism driving device 3 , a lens driving device 8 , and an image sensor 100 that photoelectrically converts light guided from a subject via the prism 30 and the lens body 9 .
- an optical axis direction along the optical axis of the lens body 9 is appropriately referred to as an X direction.
- a direction which is perpendicular to the X direction and along which light from the subject is incident on the prism 30 is appropriately referred to as a Z direction
- a direction perpendicular to both the X direction and the Z direction is appropriately referred to as Y direction.
- the side where the prism 30 is located in the X direction when viewed from the lens body 9 is referred to as an upper side
- the opposite side thereof which is the image sensor 100 side is referred to as a lower side.
- the subject side in the Z direction when viewed from the prism 30 is referred to as a front side and the opposite side thereof is referred to as a rear side.
- one side of the Y directions may be referred to as the left side and the other as the right side.
- the Z direction correspond to the thickness direction of the camera device 1 , the prism driving device 3 , and the lens driving device 8 , and to the thickness direction of the fixed portion described later.
- the case 90 of the camera device 1 has a hollow rectangular parallelopiped shape.
- the lens body 9 and the lens driving device 8 holding the lens body 9 , the prism 30 and the prism driving device 3 holding the prism 30 are aligned in the X direction and accommodated 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 as well as the prism 30 .
- a plate 91 on the front side of the case 90 has an opening 911
- a plate 95 on the rear side has an opening 951 .
- the lens body 9 can pass the opening 911 , the opening 911 allows the lens body to be arranged in the case, and the incidence surface 31 of the prism 30 can be exposed from the opening 911 .
- a plate 912 is attached to the opening 911 on the front side
- a plate 952 is attached to the opening 951 on the rear side.
- the lens body 9 is covered from the front side and the rear side. In a state where the plate 912 is attached to the opening 911 , the prism 30 is exposed to the front side from a portion on the upper side of the opening 911 .
- a base 941 is fitted into an opening on the lower side of the case 90 .
- the image sensor 100 is fixed to the base 941 with its light receiving surface facing the lens body 9 . Further, a housing 10 of a prism driving device 3 to be 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 electrical signal given from a substrate of the smartphone 400 .
- the lens driving device 8 has an X direction supporting spring (not shown), an X direction driving magnet and an X direction driving coil (not shown), a Y direction supporting spring (not shown), a Y direction driving magnet and a Y direction driving coil (not shown).
- the prism driving device 3 holds the prism 30 and drives the prism 30 around an axis parallel to the Y direction by an electrical signal given by the substrate of the smartphone 400 . Thereby, the shaking correction in the Z direction can be performed.
- the prism driving device 3 has a FPC (Flexible Printed Circuits) 80 , a coil 64 , a housing 10 , supporting bearings 26 and 27 , a holding member 40 , a supporting shaft 50 , and a plate spring 70 .
- the FPC 80 , the coil 64 , the housing 10 , the supporting bearings 26 and 27 as well as the case 90 are collectively referred to as a fixed portion.
- the FPC 80 is a member that plays a role of relaying current supply 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 sandwiches a plate 95 on the rear side of the case 90 together with the second surface portion 82 at a par connected to the second surface portion 82 ,and the second surface portion 82 is folded back to be accommodated in the case 90 . That is, the FPC 80 is attached to the case 90 so that the first surface portion 81 and the second surface portion 82 sandwich the plate 95 on the rear side of the case 90 from both sides in the Z direction.
- a concave portion 83 recessed to 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 linear portions extending in the X direction and two semicircular portions connecting the two linear portions. One of the two semicircular portions of the coil 64 straddles the concave portion 83 .
- the outer portion of the concave portion 83 is located outside the coil 64 , and the inner portion thereof is located inside the coil 64 .
- An end portion on the outer side of the coil 64 is connected to the first surface portion 81 of the FPC 80 , and an end portion on the inner side of the coil 64 is drawn to the outside of the coil 64 through the concave portion 83 and is connected to the first surface portion 81 of the FPC 80 .
- 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 includes two side plates 16 and 17 that face each other in the Y direction, and an upper plate 13 and a rear plate 15 that are interposed between the two side plates 16 and 17 .
- perfect circular through holes 165 and 175 are bored.
- a concave portion extending in the Z direction is provided at a center rear portion of the upper plate 13 , and a convex portion 431 of the holding member 40 to be described later is accommodated in the concave portion.
- the rear plate 15 is bored with an opening 151 in which the coil 64 is accommodated.
- the small-diameter portion 261 of the supporting bearing 26 is inserted and fixed in the through hole 165
- the small-diameter portion 271 of the supporting bearing 27 is inserted and fixed in the through hole 175 .
- the supporting bearings 26 and 27 are members that are interposed between the through holes 165 and 175 and the supporting shaft 50 , support the supporting shaft 50 in the supporting holes 265 and 275 thereof in a rocking manner, and assist the rocking of the supporting shaft 50 .
- the supporting bearings 26 and 27 have cylindrical small-diameter portions 261 and 271 with substantially the same diameter as the diameter of the through holes 165 and 175 , and cylindrical large-diameter portions 262 and 272 with a slightly larger diameter than the diameter of the through holes 165 and 175 .
- Supporting holes 265 and 275 are bored in the center of the supporting bearings 26 and 27 , respectively.
- the supporting hole 265 penetrates between both end surfaces of the supporting bearing 26
- the supporting hole 275 penetrates between both end surfaces of the supporting bearing 27 .
- the supporting bearings 26 and 27 are fixed to the housing 10 by inserting the small-diameter portions 261 and 271 into the through holes 165 and 175 .
- the prism 30 , the holding member 40 , and the supporting shaft 50 are integrated and accommodated in the housing 10 , and the holding member 40 is supported by the housing 10 via the plate spring 70 .
- the prism 30 has an incidence surface 31 , a reflecting surface 32 , an emitting surface 34 , and two side surfaces 36 and 37 in the Y direction that are perpendicular to the surfaces 31 , 32 and 34 .
- the prism 30 has an optical axis parallel to the Z direction from the incidence surface 31 to the reflecting surface 32 and an optical axis parallel to the X direction from the reflecting surface 32 to the emitting surface 34 .
- the light incident on the incidence surface 31 of the prism 30 from the subject is reflected by the reflecting surface 32 and guided to the lens body 9 through 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 in which a triangular prism-shaped portion occupying substantially half of a rectangular parallelopiped extending in the Y direction is cut out.
- the holding member 40 has a solid portion 41 of right-angled isosceles triangular prism-shape, and two wall portions 46 and 47 extending in a right-angled isosceles triangular prism-shape from the end portions of the solid portion 41 in the Y direction and facing each other in the Y direction.
- the holding member 40 has a rectangular shape when viewed from the Y direction. Through holes 465 and 475 are provided in the boundary portions between the wall portions 46 and 47 and the solid portion 41 , respectively.
- the end surface 42 facing the front lower direction is a tapered surface inclined by approximately 45 degrees with respect to the XY plane and the YZ plane.
- the end surface 42 corresponds to the bottom of a right triangle in the solid portion 41 of the holding member 40 .
- semicircular supporting portions 48 that slightly protrude from the end surface 42 are provided at positions apart from each other at the boundary portions with the wall portions 46 and 47 .
- the supporting portion 48 is for placing 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 supporting holes 265 and 275 of the supporting bearings 26 and 27 coincide with each other when viewed from the Y direction and are included in the supporting surface 49 .
- the supporting surface 49 and the end surface 42 are substantially parallel, and the end surface 42 does not protrude beyond the supporting surface 49 .
- concave portion 425 concaved in a semicircular shape on the end surface 42 of the solid portion 41 .
- the through hole 465 of the wall portion 46 and the through hole 475 of the wall portion 47 overlap with the concave portion 425 of the solid portion 41 .
- the through holes 465 and 475 and the concave portion 425 are provided at substantially the center of the end surface 42 .
- a supporting shaft 50 to be described later is accommodated and fixed in the through hole 465 and 475 and the concave portion 425 .
- the end surface 42 is provided with four recesses 424 each recessed in a stepped shape so that the weight around the supporting shaft 50 is balanced when the prism 30 is attached.
- the rear surface 45 of the solid portion 42 is provided with a recess in which a magnet 61 is accommodated and fixed.
- the magnet 61 is a member that serves as a driving portion for driving the holding member 40 together with the coil 64 .
- the end surface on the rear side of the magnet 61 confronts the coil 64 with a minor space reserved.
- the center portion in the Y direction on the upper surface 43 of the solid portion 41 protrudes upward as a convex portion 431 . This convex portion 431 is fitted into the opening 731 of the plate spring 70 .
- the supporting shaft 50 is a member that plays a role of supporting the holding member 40 in a rockable manner. As shown in FIG. 8A and FIG. 8B , The shape of the supporting shaft 50 resembles the shape in which an elongated cylindrical is selectively cut out in such a manner that a portion occupying the center thereof in the extending direction is left and the remaining portion forms a semicylindrical shape.
- the diameter of the supporting shaft 50 is slightly thinner than the diameter of the through holes 465 , 475 , 265 , and 275 .
- the length of the supporting shaft 50 is longer than the distance between the wall portions 46 and 47 facing each other in the Y direction in the holding member 40 , and shorter than the distance between the plates 96 and 97 facing each other in the Y direction in the case 90 .
- the two end portions of the supporting shaft 50 have a cylindrical shape.
- the center portion of the supporting shaft 50 has a first outer peripheral surface 55 and a second outer peripheral surface 52 housed within the region of the first outer peripheral surface 55 .
- the first outer peripheral surface 55 is flush with the outer peripheral surface of the cylindrical shape at both ends along the axis line AXS passing through the center O of the cylindrical shape.
- the center of the first outer peripheral surface 55 is at the same position as the axis line AXS.
- the second outer peripheral surface 52 is substantially a flat surface.
- the second outer peripheral surface 52 is located further inside than the cylindrical outer peripheral surface.
- the second outer peripheral surface 52 is provided at a position cut out from the outer peripheral surface of the cylindrical shape, a portion of which is constituted by the first outer peripheral surface 55 , to a depth exceeding the axis line AXS.
- the boundary portions between the second outer peripheral surface 52 and the erected surfaces 571 and 561 at two ends thereof are curving gently.
- the prism 30 is arranged so as to be fit within a position cut out to a depth exceeding the axis line AXS.
- the supporting shaft 50 is supported so that the center portion fits into the concave portion 425 of the holding member 40 , and the second outer peripheral surface 52 thereof faces the normal line direction of the end surface 42 of the holding member 40 .
- the two end portions in the Y direction of the supporting shaft 50 pass through the through holes 465 and 475 of the holding member 40 and are inserted halfway from one end sides of the supporting holes 265 and 275 of the supporting bearings 26 and 27 .
- the centers O of the cylindrical shapes of the two end portions of the supporting shaft 50 and the centers of the through holes 465 and 475 of the holding member 40 coincide with each other.
- the inner surface of the plate 96 and the inner surface of the plate 97 of the case 90 face each other in the Y direction sandwiching the housing 10 and abut against the end surfaces of the large-diameter portions 262 and 272 of the supporting bearings 26 and 27 .
- the inner surface of the plate 96 and the inner surface of the plate 97 close the other end sides of the supporting hole 265 of the supporting bearing 26 and the supporting hole 275 of the supporting bearing 27 .
- the side surfaces 36 and 37 of the prism 30 on the supporting surface 49 of the holding member 40 and the wall portions 46 and 47 of the holding member 40 are bonded and fixed to each other. Further, a portion of the outer peripheral surface of the supporting shaft 50 composed of the first outer peripheral surface 55 and the outer peripheral surfaces of the cylindrical shapes at two end portions is fixed to at least one of the through holes 465 and 475 or the concave portion 425 of the holding member 40 . Adhesive is filled between the outer peripheral surface of the supporting shaft 50 and the inner peripheral surface of the through hole 475 in the through hole 465 , and between the outer peripheral surface of the supporting shaft 50 and the inner peripheral surface of the through hole 475 in the through hole 475 , so that the holding member 40 and the supporting shaft 50 are fixed. Thereby, the holding member 40 , the prism 30 , and the supporting shaft 50 are integrated.
- the center O of the first outer peripheral surface 55 of the supporting shaft 50 is on the supporting surface 49 of the holding member 40 and the reflecting surface 32 of the prism 30 , wherein the entire second outer peripheral surface 52 is located closer to the side of the first outer peripheral surface 55 than the supporting surface 49 and the reflecting surface 32 . That is, since it is assembled so as to be parallel to the end face 42 , the second outer peripheral surface 52 is lower than the height of the supporting surface 49 of the holding member 40 and does not contact the reflecting surface 32 , as shown in FIG. 8C .
- the second outer peripheral surface 52 is set to be lower than the height of the supporting surface 49 of the holding member 40 . In this way, as shown in FIG. 8C , a gap GP is formed between the reflecting surface 32 of the prism 30 and the second outer peripheral surface 52 of the supporting shaft 50 .
- a resin with viscoelasticity is filled between the outer peripheral surface of the supporting shaft 50 and the inner peripheral surface of the supporting hole 265 , and between the outer peripheral surface of the supporting shaft 50 and the inner peripheral surface of the supporting hole 275 .
- the resin with viscoelasticity includes a so-called damper gel.
- the end surfaces 56 and 57 of the supporting shaft 50 are also provided with a damper gel.
- the damper gel is easy to keep its shape with respect to a normal so-called liquid lubricant, and easily keeps the supporting shaft 50 at the center position of the supporting hole 265 and 275 . Further, the spaces between the end surfaces 56 and 57 of the supporting shaft 50 in the supporting holes 265 and 275 and the plates 96 and 97 of the case 90 that is the fixed portion are airtight. Further, the integration of holding member 40 , prism 30 , and holding member 40 can be rocked with respect to the housing 10 .
- the plate spring 70 is a member that plays a role of restricting the movement of the integration of holding member 40 , prism 30 , and holding member 40 by connecting the housing 10 (the fixed portion) and the holding member 40 .
- the plate spring 70 is arranged so as to extend in the YZ plane, that is, so as to extend in the extending direction of the supporting shaft 50 and the thickness direction of the housing 10 which is the thickness direction of the fixed body.
- the plate spring 70 is arranged 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.
- the plate spring 70 has outer portions 76 and 77 formed at the two ends, a center portion 73 formed at the center, and arm portions 760 and 770 connecting the outer portions 76 and 77 and the center portion 73 .
- Each of the two arm portions 760 and 770 has a twisted shape.
- the outer portion 76 , the center portion 73 , and the outer portion 77 are formed so as to be aligned in the Y direction and respectively extend in the Z direction.
- a portion having the outer portion 76 , the center portion 73 and the arm portion 760 and a portion having the outer portion 77 , the center portion 73 and the arm portion 770 are referred to as plate spring pieces.
- the plate spring 70 is formed in line symmetry as a whole with the center portion 73 as a symmetry axis. Further, the two plate spring pieces are formed in line symmetry in the Y direction and the Z direction, respectively.
- the plate spring 70 is a plate body as a whole, and the center portion 73 and the outer portion 76 and 77 are also flat plate bodies.
- 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 connecting the front side end portions of the center portion 73 and the outer portion 76 , and a second wire 762 connecting the rear side end portions of the center portion 73 and the outer portion 76 .
- the arm portion 770 has a first wire 771 connecting the front side end portions of the center portion 73 and the outer portion 77 , and a second wire 772 connecting the rear side end portions of the center portion 73 and the outer portion 77 .
- Each of the first wires 761 and 771 and the second wires 762 and 772 has a shape in which an English alphabet “S” and its mirror letter face each other, the end portions facing outward of the two alphabets are stretched in the Y direction to connect the end portions of center portion 73 and the outer portions 76 and 77 , and the end portions facing inward are stretched along the Y direction to connected to each other.
- the plate spring 70 is fixed to the holding member 40 so that the convex portion 431 of the holding member 40 is fitted into the opening 731 .
- the outer portions 76 and 77 of the plate spring 70 are fixed to the protrusions 432 at the intersecting positions of the side plates 16 and 17 and the housing 10 .
- the plate spring 70 is mounted in a state of keeping a substantially flat plate.
- the holding member 40 in the housing 10 is held by the plate spring 70 so that the upper surface 43 thereof is in a position confronting the plate 13 of the housing 10 in parallel (hereinafter, this position is referred to as an initial position).
- the integration of prism 30 , holding member 40 , and supporting shaft 50 is rotated to a position where the driving force generated in the magnet 61 and the urging force accompanying the deformation of the plate spring 70 are balanced.
- the light emitted from the prism 30 is emitted in a direction rotated in a counterclockwise direction with respect to the light emitted at the initial position, and reaches the image sensor 100 via the lens body 9 .
- the integration of prism 30 , holding member 40 , and supporting shaft 50 is rotated in a clockwise direction by the restoring force of the plate spring 70 and returns to the initial position.
- the supporting shaft 50 has two end portions of cylindrical shape to be fitted into the supporting holes 265 and 275 , and a center portion having a first outer peripheral surface 55 flush with the outer peripheral surface of the cylindrical shape along the axis line AXS of the cylindrical shape and a second outer peripheral surface 52 located further inside than the outer peripheral surface of the cylindrical shape.
- the center of the first outer peripheral surface 55 is on the supporting surface 49
- the entire second outer peripheral surface 52 is closer to the side of the first outer peripheral surface 55 than the supporting surface 49 . Accordingly, the reflecting surface 32 of the prism 30 placed on the supporting surface 49 can be made to coincide with the center of the outer peripheral surface of the supporting shaft 50 that is the rocking shaft. Therefore, according to the present embodiment, it is possible to provide a prism driving device 3 that requires a small space for rocking and is easy to be miniaturized.
- a supporting shaft 50 and a plate spring 70 are included.
- the supporting shaft 50 supports the holding member 40 in a rockable manner with respect to the housing 10
- the plate spring 70 connects the housing 10 and the holding member 40 .
- the plate spring 70 is provided to extend in an YZ plane including the Y direction in which the supporting shaft 50 extends. Accordingly, the holding member 40 supporting the prism 30 can easily return to the initial position by the resilient force of the plate spring 70 . Therefore, according to the present embodiment, it is possible to provide a prism driving device 3 that can easily return the mounted prism 30 to the initial position.
- a supporting shaft 50 and supporting bearings 26 and 27 are included.
- the supporting shaft 50 supports the holding member 40
- the supporting bearings 26 and 27 serve as the fixed portion and are arranged at two end portions of the supporting shaft 50 to support the supporting shaft 50 in a rockable manner with respect to the supporting holes 265 and 275 in the supporting holes 265 and 275 thereof.
- a resin with viscoelasticity is filled between the outer peripheral surface of the supporting shaft 50 and the inner peripheral surfaces in the supporting holes 265 and 275 of the supporting bearings 26 and 27 . Due to this resin, it is difficult for the impact to be transmitted to the supporting shaft 50 , and hence, to the prism 30 supported by the supporting shaft 50 . Therefore, according to the present embodiment, it is possible to provide a prism driving device 3 in which an impact is difficult to be transmitted to the prism 30 even the impact is applied.
- a supporting shaft 50 fixed to the holding member 40 , and supporting bearings 26 and 27 serving as the fixed portion and supporting the supporting shaft 50 in a rockable manner in the supporting holes 265 and 275 thereof are included.
- the supporting shaft 50 are fitted up to halfway from one end sides of the supporting holes 265 and 275 , and the plates 96 and 97 of the case 90 serving as the fixed portion close the other end sides of the supporting holes 265 and 275 .
- the spaces between the supporting shaft 50 and plates 96 and 97 in the supporting holes 265 and 275 of the supporting bearings 26 and 27 are in an airtight state, and dead air spaces are created in the spaces.
- the dead air spaces act as air springs.
- the supporting shaft 50 moves in the Y direction, it does not collide with the plates 96 and 97 , and even if it collides with them, the impact is small. Therefore, according to the present embodiment, it is possible to provide a prism driving device 3 in which the prism 30 and the holding member 40 and the supporting shaft 50 that support the prism 30 move along the supporting shaft 50 and do not collide with other portions.
- the supporting shaft 50 may be directly fitted into the through holes 165 and 175 of the housing 10 without providing the supporting bearings 26 and 27 .
- the through holes 165 and 175 are regarded as the supporting holes 265 and 275 .
- the thicknesses of the two side plates 16 and 17 of the housing 10 and the through holes 165 and 175 in the center thereof in the Y direction are increased.
- the diameters of the through holes 165 and 175 are slightly larger than the diameter of the supporting shaft 50 .
- the plate spring 70 does not need to be provided along the thickness direction of the housing 10 as long as it is provided to extend along the extending direction of the supporting shaft 50 , that is, extend in a plane including the Y direction.
- it may be provided so as to extend in a direction parallel to the end surface 42 .
- the center portion 73 and the outer portions 76 and 77 of the plate spring 70 are provided so as to always align in the Y direction.
- the outer portions 76 and 77 are attached to the fixed portion and the center portion 73 is attached to the holding member 40 , but the outer portions 76 and 77 may be attached to the holding member 40 and the center portion 73 may be attached to the fixed portion.
- the members closing the supporting holes 265 and 275 of the supporting bearings 26 and 27 are not necessary to be the plates 96 and 97 of the case 90 .
- members that simply close the supporting holes 265 and 275 may be stuck to the support bearings 26 and 27 .
- the supporting holes 265 and 275 may be provided with a slight air escape port without being completely closed.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Studio Devices (AREA)
Abstract
An optical element driving device is described that includes a fixed portion having supporting holes, a holding member having a supporting portion supporting an optical element, and a supporting shaft supporting the holding member. The fixed portion is disposed at positions of two end portions of the supporting shaft to support the supporting shaft in the supporting holes in a rockable manner. A resin with viscoelasticity is filled between the outer peripheral surface of the supporting shaft which is rockable in the supporting holes and an inner peripheral surface of the supporting hole of the fixed portion.
Description
- This application is a continuation of U.S. patent application Ser. No. 16/716,951, filed Dec. 17, 2019, and titled OPTICAL ELEMENT DRIVING DEVICE, CAMERA DEVICE, AND ELECTRONIC APPARATUS, which claims the benefit of Japanese patent applications JP2019-096233, JP2019-096241, JP2019-096254 and JP2019-096260, each filed on May 22, 2019, the entire contents of each of which are incorporated by reference herein.
- The present disclosure relates to an optical element driving device, a camera device and an electronic apparatus used in electronic apparatus such as smartphones.
- A camera device mounted in an electronic apparatus such as a smartphone has a prism for correcting image blur and a member holding the prism in a rockable manner, and has a configuration in which light from a subject is guided to an imaging surface of the camera after being reflected by the prism. As an example of such a document disclosing a technique related to this type of camera device, Chinese utility model CN205942054U (hereinafter referred to as “Patent Document 1” may be picked up. A periscopic imaging module described in Patent Document 1 has a prism, a prism pedestal having a tapered surface on which the prism is placed, a supporting shaft inserted into the shaft hole of the prism pedestal, a magnet and a coil generating a driving force of the prism pedestal, and a housing supporting two ends of the supporting shaft in a rockable manner. In this periscopic imaging module, the prism pedestal and the prism on the supporting surface of the prism pedestal are rocked with the supporting shaft as a rocking shaft by the driving force of the magnet and the coil.
- However, in the technique of Patent Document 1, since the rocking shaft of the prism does not coincide with the reflecting surface of the prism, there is a problem that it is difficult to reduce the size of the device because a large space is required to rock the prism only at the same angle.
- The present disclosure has been made in view of such problem, and an object thereof is to provide an optical element driving device, a camera device and an electronic apparatus requiring a small space for rocking and easy to be miniaturized.
- According to a first aspect of the present disclosure, there is provided an optical element driving device include: a fixed portion having supporting holes; a holding member having a supporting surface formed by a supporting portion supporting an optical element; and a supporting shaft supporting the holding member in a rockable manner with respect to the fixed portion. The supporting shaft has two end portions of cylindrical shape to be fitted into the supporting holes, and a center portion having a first outer peripheral surface and a second outer peripheral surface. The first outer peripheral surface is flush with an outer peripheral surface of the cylindrical shape along an axis line of the cylindrical shape, and the second outer peripheral surface is located further inside than the first outer peripheral surface. The center of the first outer peripheral surface is on the supporting surface, and the entire second outer peripheral surface is closer to the first outer peripheral surface than the supporting surface.
- According to a second aspect of the present disclosure, there is provided a camera device including the optical element driving device described above.
- According to a third aspect of the present disclosure, there is provided an electronic apparatus including the camera device described above.
-
FIG. 1 is a front view of asmartphone 400 which is an electronic apparatus mounted with a camera device 1 including aprism driving device 3 according to one embodiment of the present disclosure. -
FIG. 2 is a perspective view of the camera device 1 including theprism driving device 3 ofFIG. 1 . -
FIG. 3 is a cross-sectional view taken along line A-A′ ofFIG. 2 . -
FIG. 4 is a perspective view of the camera device including theprism driving device 3 ofFIG. 2 as viewed from another viewpoint. -
FIG. 5A is a cross-sectional view taken along line B-B′ ofFIG. 4 . -
FIG. 5 B is an enlarged view inside the frame ofFIG. 5A . -
FIG. 6 is an exploded perspective view of theprism driving device 3 ofFIG. 2 . -
FIG. 7 is a perspective view of the FPC 80, thecoil 64, thehousing 10, the supporting bearings (26, 27), theholding member 40, the supportingshaft 50, themagnet 61, theplate spring 40, and theprism 30 ofFIG. 6 as viewed from another viewpoint. -
FIG. 8A is a view of the supportingshaft 50 ofFIG. 6 as viewed from the direction of arrow C. -
FIG. 8B is a view ofFIG. 8A as viewed from the direction of arrow D. -
FIG. 8C is a view showing the relationship between the second outerperipheral surface 52 of the supportingshaft 50 ofFIG. 8A and the reflectingsurface 32 of theprism 30. -
FIG. 9 is a view of theplate spring 70 ofFIG. 6 andFIG. 7 as viewed from the direction of arrow E. -
FIG. 10A is a view showing an appearance of theplate spring 70 when theholding member 40 of theprism driving device 3 ofFIG. 1 is rocked in the counterclockwise direction. -
FIG. 10B is a view showing an appearance of theplate 40 spring when theholding member 40 is rocked in the reverse direction. - Hereinafter, embodiments of the present disclosure are explained with reference to drawings. As shown in
FIG. 1 , the camera device 1 is embedded in the corner on the rear surface of the housing of thesmartphone 400. The camera device 1 has aprism 30 andlens body 9 as an optical element, aprism driving device 3, alens driving device 8, and animage sensor 100 that photoelectrically converts light guided from a subject via theprism 30 and thelens body 9. - Hereinafter, an optical axis direction along the optical axis of the
lens body 9 is appropriately referred to as an X direction. Further, a direction which is perpendicular to the X direction and along which light from the subject is incident on theprism 30 is appropriately referred to as a Z direction, and a direction perpendicular to both the X direction and the Z direction is appropriately referred to as Y direction. Further, the side where theprism 30 is located in the X direction when viewed from thelens body 9 is referred to as an upper side, and the opposite side thereof which is theimage sensor 100 side is referred to as a lower side. Further, the subject side in the Z direction when viewed from theprism 30 is referred to as a front side and the opposite side thereof is referred to as a rear side. Further, one side of the Y directions may be referred to as the left side and the other as the right side. The Z direction correspond to the thickness direction of the camera device 1, theprism driving device 3, and thelens driving device 8, and to the thickness direction of the fixed portion described later. - As shown in
FIG. 2 andFIG. 4 , thecase 90 of the camera device 1 has a hollow rectangular parallelopiped shape. Thelens body 9 and thelens driving device 8 holding thelens body 9, theprism 30 and theprism driving device 3 holding theprism 30 are aligned in the X direction and accommodated in a space inside thecase 90. Theprism driving device 3 is an optical element driving device. The optical element may be a reflecting mirror or the like as well as theprism 30. - As shown in
FIG. 6 , aplate 91 on the front side of thecase 90 has an opening 911, and aplate 95 on the rear side has an opening 951. Thelens body 9 can pass the opening 911, the opening 911 allows the lens body to be arranged in the case, and theincidence surface 31 of theprism 30 can be exposed from the opening 911. Aplate 912 is attached to the opening 911 on the front side, and aplate 952 is attached to the opening 951 on the rear side. Thelens body 9 is covered from the front side and the rear side. In a state where theplate 912 is attached to the opening 911, theprism 30 is exposed to the front side from a portion on the upper side of the opening 911. Abase 941 is fitted into an opening on the lower side of thecase 90. Theimage sensor 100 is fixed to thebase 941 with its light receiving surface facing thelens body 9. Further, ahousing 10 of aprism driving device 3 to be described later is fitted and exposed in the opening on the upper side of thecase 90. - The
lens driving device 8 holds thelens body 9 and drives thelens body 9 in the X direction and the Y direction by an electrical signal given from a substrate of thesmartphone 400. As shown inFIG. 3 , thelens driving device 8 has an X direction supporting spring (not shown), an X direction driving magnet and an X direction driving coil (not shown), a Y direction supporting spring (not shown), a Y direction driving magnet and a Y direction driving coil (not shown). When an electric current is supplied to the X direction driving coil or the Y direction driving coil of thelens driving device 8, an electromagnetic force is generated in the X direction driving coil or a Y direction driving coil and resists the urging force of the X direction spring or the Y direction spring, so that thelens body 9 moves in the X direction or the Y direction. Focus adjustment can be performed by the moving of thelens body 9 in the X direction, and shaking correction in the Y direction can be performed by the moving of thelens body 9 in the Y direction. - The
prism driving device 3 holds theprism 30 and drives theprism 30 around an axis parallel to the Y direction by an electrical signal given by the substrate of thesmartphone 400. Thereby, the shaking correction in the Z direction can be performed. As shown inFIG. 6 andFIG. 7 , theprism driving device 3 has a FPC (Flexible Printed Circuits)80, acoil 64, ahousing 10, supportingbearings member 40, a supportingshaft 50, and aplate spring 70. TheFPC 80, thecoil 64, thehousing 10, the supportingbearings case 90 are collectively referred to as a fixed portion. - The
FPC 80 is a member that plays a role of relaying current supply from the substrate of thesmartphone 400 to thecoil 64. TheFPC 80 has a T-shapedfirst surface portion 81 and a U-shapedsecond surface portion 82. Thefirst surface portion 81 of theFPC 80 sandwiches aplate 95 on the rear side of thecase 90 together with thesecond surface portion 82 at a par connected to thesecond surface portion 82,and thesecond surface portion 82 is folded back to be accommodated in thecase 90. That is, theFPC 80 is attached to thecase 90 so that thefirst surface portion 81 and thesecond surface portion 82 sandwich theplate 95 on the rear side of thecase 90 from both sides in the Z direction. - In one corner of the front surface of the
first surface portion 81 of theFPC 80, aconcave portion 83 recessed to the rear side is provided. Acoil 64 is fixed to thefirst surface portion 81 of theFPC 80. Thecoil 64 has two linear portions extending in the X direction and two semicircular portions connecting the two linear portions. One of the two semicircular portions of thecoil 64 straddles theconcave portion 83. The outer portion of theconcave portion 83 is located outside thecoil 64, and the inner portion thereof is located inside thecoil 64. An end portion on the outer side of thecoil 64 is connected to thefirst surface portion 81 of theFPC 80, and an end portion on the inner side of thecoil 64 is drawn to the outside of thecoil 64 through theconcave portion 83 and is connected to thefirst surface portion 81 of theFPC 80. - The
housing 10 is located at a position in thecase 90 that covers thefirst surface portion 81 of theFPC 80 from the front side. Thehousing 10 includes twoside plates upper plate 13 and arear plate 15 that are interposed between the twoside plates side plates holes upper plate 13, and aconvex portion 431 of the holdingmember 40 to be described later is accommodated in the concave portion. Therear plate 15 is bored with an opening 151 in which thecoil 64 is accommodated. The small-diameter portion 261 of the supportingbearing 26 is inserted and fixed in the throughhole 165, and the small-diameter portion 271 of the supportingbearing 27 is inserted and fixed in the throughhole 175. - The supporting
bearings holes shaft 50, support the supportingshaft 50 in the supportingholes shaft 50. The supportingbearings diameter portions holes diameter portions holes holes bearings hole 265 penetrates between both end surfaces of the supportingbearing 26, and the supportinghole 275 penetrates between both end surfaces of the supportingbearing 27. The supportingbearings housing 10 by inserting the small-diameter portions holes - The
prism 30, the holdingmember 40, and the supportingshaft 50 are integrated and accommodated in thehousing 10, and the holdingmember 40 is supported by thehousing 10 via theplate spring 70. Theprism 30 has anincidence surface 31, a reflectingsurface 32, an emittingsurface 34, and twoside surfaces surfaces prism 30 has an optical axis parallel to the Z direction from theincidence surface 31 to the reflectingsurface 32 and an optical axis parallel to the X direction from the reflectingsurface 32 to the emittingsurface 34. The light incident on theincidence surface 31 of theprism 30 from the subject is reflected by the reflectingsurface 32 and guided to thelens body 9 through the emittingsurface 34. - The holding
member 40 is a member that plays a role of holding theprism 30. The holdingmember 40 has a shape in which a triangular prism-shaped portion occupying substantially half of a rectangular parallelopiped extending in the Y direction is cut out. Specifically, the holdingmember 40 has asolid portion 41 of right-angled isosceles triangular prism-shape, and twowall portions solid portion 41 in the Y direction and facing each other in the Y direction. The holdingmember 40 has a rectangular shape when viewed from the Y direction. Throughholes wall portions solid portion 41, respectively. - As shown in
FIG. 6 , theend surface 42 facing the front lower direction is a tapered surface inclined by approximately 45 degrees with respect to the XY plane and the YZ plane. Theend surface 42 corresponds to the bottom of a right triangle in thesolid portion 41 of the holdingmember 40. On theend surface 42, semicircular supportingportions 48 that slightly protrude from theend surface 42 are provided at positions apart from each other at the boundary portions with thewall portions portion 48 is for placing theprism 30. The tips of the four supportingportions 48 form a supportingsurface 49, and the supportingsurface 49 coincides with the reflectingsurface 32 of theprism 30. The centers of the supportingholes bearings surface 49. The supportingsurface 49 and theend surface 42 are substantially parallel, and theend surface 42 does not protrude beyond the supportingsurface 49. - There is concave portion 425 concaved in a semicircular shape on the
end surface 42 of thesolid portion 41. As viewed from the Y direction, the throughhole 465 of thewall portion 46 and the throughhole 475 of thewall portion 47 overlap with the concave portion 425 of thesolid portion 41. The throughholes end surface 42. A supportingshaft 50 to be described later is accommodated and fixed in the throughhole end surface 42 is provided with fourrecesses 424 each recessed in a stepped shape so that the weight around the supportingshaft 50 is balanced when theprism 30 is attached. - As shown in
FIG. 3 andFIG. 5(A) , therear surface 45 of thesolid portion 42 is provided with a recess in which amagnet 61 is accommodated and fixed. Themagnet 61 is a member that serves as a driving portion for driving the holdingmember 40 together with thecoil 64. The end surface on the rear side of themagnet 61 confronts thecoil 64 with a minor space reserved. Further, as shown inFIG. 3 andFIG. 7 , the center portion in the Y direction on theupper surface 43 of thesolid portion 41 protrudes upward as aconvex portion 431. Thisconvex portion 431 is fitted into the opening 731 of theplate spring 70. - The supporting
shaft 50 is a member that plays a role of supporting the holdingmember 40 in a rockable manner. As shown inFIG. 8A andFIG. 8B , The shape of the supportingshaft 50 resembles the shape in which an elongated cylindrical is selectively cut out in such a manner that a portion occupying the center thereof in the extending direction is left and the remaining portion forms a semicylindrical shape. The diameter of the supportingshaft 50 is slightly thinner than the diameter of the throughholes shaft 50 is longer than the distance between thewall portions member 40, and shorter than the distance between theplates case 90. - The two end portions of the supporting
shaft 50 have a cylindrical shape. The center portion of the supportingshaft 50 has a first outerperipheral surface 55 and a second outerperipheral surface 52 housed within the region of the first outerperipheral surface 55. The first outerperipheral surface 55 is flush with the outer peripheral surface of the cylindrical shape at both ends along the axis line AXS passing through the center O of the cylindrical shape. The center of the first outerperipheral surface 55 is at the same position as the axis line AXS. The second outerperipheral surface 52 is substantially a flat surface. The second outerperipheral surface 52 is located further inside than the cylindrical outer peripheral surface. The second outerperipheral surface 52 is provided at a position cut out from the outer peripheral surface of the cylindrical shape, a portion of which is constituted by the first outerperipheral surface 55, to a depth exceeding the axis line AXS. The boundary portions between the second outerperipheral surface 52 and the erectedsurfaces FIG. 8C , theprism 30 is arranged so as to be fit within a position cut out to a depth exceeding the axis line AXS. - The supporting
shaft 50 is supported so that the center portion fits into the concave portion 425 of the holdingmember 40, and the second outerperipheral surface 52 thereof faces the normal line direction of theend surface 42 of the holdingmember 40. The two end portions in the Y direction of the supportingshaft 50 pass through the throughholes member 40 and are inserted halfway from one end sides of the supportingholes bearings shaft 50 and the centers of the throughholes member 40 coincide with each other. - As shown in
FIG. 5B , the inner surface of theplate 96 and the inner surface of theplate 97 of thecase 90 face each other in the Y direction sandwiching thehousing 10 and abut against the end surfaces of the large-diameter portions bearings plate 96 and the inner surface of theplate 97 close the other end sides of the supportinghole 265 of the supportingbearing 26 and the supportinghole 275 of the supportingbearing 27. - The side surfaces 36 and 37 of the
prism 30 on the supportingsurface 49 of the holdingmember 40 and thewall portions member 40 are bonded and fixed to each other. Further, a portion of the outer peripheral surface of the supportingshaft 50 composed of the first outerperipheral surface 55 and the outer peripheral surfaces of the cylindrical shapes at two end portions is fixed to at least one of the throughholes member 40. Adhesive is filled between the outer peripheral surface of the supportingshaft 50 and the inner peripheral surface of the throughhole 475 in the throughhole 465, and between the outer peripheral surface of the supportingshaft 50 and the inner peripheral surface of the throughhole 475 in the throughhole 475, so that the holdingmember 40 and the supportingshaft 50 are fixed. Thereby, the holdingmember 40, theprism 30, and the supportingshaft 50 are integrated. - When the integration of holding
member 40,prism 30, and supportingshaft 50 is viewed from the Y direction, the center O of the first outerperipheral surface 55 of the supportingshaft 50 is on the supportingsurface 49 of the holdingmember 40 and the reflectingsurface 32 of theprism 30, wherein the entire second outerperipheral surface 52 is located closer to the side of the first outerperipheral surface 55 than the supportingsurface 49 and the reflectingsurface 32. That is, since it is assembled so as to be parallel to theend face 42, the second outerperipheral surface 52 is lower than the height of the supportingsurface 49 of the holdingmember 40 and does not contact the reflectingsurface 32, as shown inFIG. 8C . Further, even if the second outerperipheral surface 52 is not parallel to theend surface 42, the second outerperipheral surface 52 is set to be lower than the height of the supportingsurface 49 of the holdingmember 40. In this way, as shown inFIG. 8C , a gap GP is formed between the reflectingsurface 32 of theprism 30 and the second outerperipheral surface 52 of the supportingshaft 50. - As shown in
FIG. 5B , at the portions of the supportingshaft 50 that are fitted in the supportingholes bearings shaft 50 and the inner peripheral surface of the supportinghole 265, and between the outer peripheral surface of the supportingshaft 50 and the inner peripheral surface of the supportinghole 275. The resin with viscoelasticity includes a so-called damper gel. The end surfaces 56 and 57 of the supportingshaft 50 are also provided with a damper gel. By this damper gel, shaking generated in the integration of holdingmember 40,prism 30, and supportingshaft 50 due to support by theplate spring 70 can be converged at early stage. Further, the damper gel is easy to keep its shape with respect to a normal so-called liquid lubricant, and easily keeps the supportingshaft 50 at the center position of the supportinghole shaft 50 in the supportingholes plates case 90 that is the fixed portion are airtight. Further, the integration of holdingmember 40,prism 30, and holdingmember 40 can be rocked with respect to thehousing 10. - The
plate spring 70 is a member that plays a role of restricting the movement of the integration of holdingmember 40,prism 30, and holdingmember 40 by connecting the housing 10 (the fixed portion) and the holdingmember 40. Theplate spring 70 is arranged so as to extend in the YZ plane, that is, so as to extend in the extending direction of the supportingshaft 50 and the thickness direction of thehousing 10 which is the thickness direction of the fixed body. In other words, theplate spring 70 is arranged along the stacking direction of thecoil 64 and themagnet 61 so as not to overlap thecoil 64 and themagnet 61. As shown inFIG. 9 , theplate spring 70 hasouter portions center portion 73 formed at the center, andarm portions 760 and 770 connecting theouter portions center portion 73. Each of the twoarm portions 760 and 770 has a twisted shape. Theouter portion 76, thecenter portion 73, and theouter portion 77 are formed so as to be aligned in the Y direction and respectively extend in the Z direction. For convenience, a portion having theouter portion 76, thecenter portion 73 and the arm portion 760 and a portion having theouter portion 77, thecenter portion 73 and thearm portion 770 are referred to as plate spring pieces. Theplate spring 70 is formed in line symmetry as a whole with thecenter portion 73 as a symmetry axis. Further, the two plate spring pieces are formed in line symmetry in the Y direction and the Z direction, respectively. - More specifically, the
plate spring 70 is a plate body as a whole, and thecenter portion 73 and theouter portion center portion 73. The size of the opening 731 is slightly larger than the size of theconvex portion 431 of the holdingmember 40. The arm portion 760 has a first wire 761 connecting the front side end portions of thecenter portion 73 and theouter portion 76, and a second wire 762 connecting the rear side end portions of thecenter portion 73 and theouter portion 76. Thearm portion 770 has a first wire 771 connecting the front side end portions of thecenter portion 73 and theouter portion 77, and a second wire 772 connecting the rear side end portions of thecenter portion 73 and theouter portion 77. - Each of the first wires 761 and 771 and the second wires 762 and 772 has a shape in which an English alphabet “S” and its mirror letter face each other, the end portions facing outward of the two alphabets are stretched in the Y direction to connect the end portions of
center portion 73 and theouter portions - The
plate spring 70 is fixed to the holdingmember 40 so that theconvex portion 431 of the holdingmember 40 is fitted into the opening 731. Theouter portions plate spring 70 are fixed to the protrusions 432 at the intersecting positions of theside plates housing 10. Theplate spring 70 is mounted in a state of keeping a substantially flat plate. The holdingmember 40 in thehousing 10 is held by theplate spring 70 so that theupper surface 43 thereof is in a position confronting theplate 13 of thehousing 10 in parallel (hereinafter, this position is referred to as an initial position). - In
FIG. 3 , when a current flows from theFPC 80 to thecoil 64, a driving force in the X direction is generated in themagnet 61 due to the electromagnetic action between thecoil 64 and themagnet 61. Since themagnet 61 is disposed to be shifted rearward in the Z direction with respect to the supportingshaft 50, when a driving force on the lower side in the X direction is generated in themagnet 61, the holdingmember 40 and theprism 30 held in the holdingmember 40 are rotated in a counterclockwise direction around the supportingshaft 50 as a center. At this time, since the holdingmember 40 and thehousing 10 are connected by theplate spring 70, the integration ofprism 30, holdingmember 40, and supportingshaft 50 is rotated to a position where the driving force generated in themagnet 61 and the urging force accompanying the deformation of theplate spring 70 are balanced. Thereby, the light emitted from theprism 30 is emitted in a direction rotated in a counterclockwise direction with respect to the light emitted at the initial position, and reaches theimage sensor 100 via thelens body 9. When the supply of current to thecoil 64 is stopped, the integration ofprism 30, holdingmember 40, and supportingshaft 50 is rotated in a clockwise direction by the restoring force of theplate spring 70 and returns to the initial position. - When a current in the reverse direction flows in the
coil 64, a driving force on the upper side in the X direction is generated in themagnet 61, and the integration ofprism 30, holdingmember 40, and supportingshaft 50 is rotated in the clockwise direction to a position where the driving force and the urging force are balanced. Thereby, the light emitted from theprism 30 is emitted in a direction rotated in the clockwise direction with respect to the light emitted at the initial position, and reaches theimage sensor 100 via thelens body 9. When the supply of current to thecoil 64 is stopped, the integration ofprism 30, holdingmember 40, and supportingshaft 50 is rotated in the counterclockwise direction and returns to the initial position. - As shown in
FIGS. 10A and 10B , when the integration ofprism 30, holdingmember 40, and supportingshaft 50 is rocked around the supportingshaft 50 as a rocking shaft, thecenter portion 73 of theplate spring 70 moves relative to theouter portions center portion 73 of theplate spring 70 is rocked in an arc shape around the supportingshaft 50, theplate spring 70 is deformed while being twisted between thecenter portion 73 and theouter portions - The above is the details of the present embodiment. According to the present embodiment, the following effects can be obtained.
- In the present embodiment, the supporting
shaft 50 has two end portions of cylindrical shape to be fitted into the supportingholes peripheral surface 55 flush with the outer peripheral surface of the cylindrical shape along the axis line AXS of the cylindrical shape and a second outerperipheral surface 52 located further inside than the outer peripheral surface of the cylindrical shape. The center of the first outerperipheral surface 55 is on the supportingsurface 49, and the entire second outerperipheral surface 52 is closer to the side of the first outerperipheral surface 55 than the supportingsurface 49. Accordingly, the reflectingsurface 32 of theprism 30 placed on the supportingsurface 49 can be made to coincide with the center of the outer peripheral surface of the supportingshaft 50 that is the rocking shaft. Therefore, according to the present embodiment, it is possible to provide aprism driving device 3 that requires a small space for rocking and is easy to be miniaturized. - Further, in the present embodiment, a supporting
shaft 50 and aplate spring 70 are included. The supportingshaft 50 supports the holdingmember 40 in a rockable manner with respect to thehousing 10, and theplate spring 70 connects thehousing 10 and the holdingmember 40. Theplate spring 70 is provided to extend in an YZ plane including the Y direction in which the supportingshaft 50 extends. Accordingly, the holdingmember 40 supporting theprism 30 can easily return to the initial position by the resilient force of theplate spring 70. Therefore, according to the present embodiment, it is possible to provide aprism driving device 3 that can easily return the mountedprism 30 to the initial position. - Further, in the present embodiment, a supporting
shaft 50 and supportingbearings shaft 50 supports the holdingmember 40, and the supportingbearings shaft 50 to support the supportingshaft 50 in a rockable manner with respect to the supportingholes holes shaft 50 and the inner peripheral surfaces in the supportingholes bearings shaft 50, and hence, to theprism 30 supported by the supportingshaft 50. Therefore, according to the present embodiment, it is possible to provide aprism driving device 3 in which an impact is difficult to be transmitted to theprism 30 even the impact is applied. - Further, in the present embodiment, a supporting
shaft 50 fixed to the holdingmember 40, and supportingbearings shaft 50 in a rockable manner in the supportingholes shaft 50 are fitted up to halfway from one end sides of the supportingholes plates case 90 serving as the fixed portion close the other end sides of the supportingholes shaft 50 andplates holes bearings shaft 50 moves in the Y direction, it does not collide with theplates prism driving device 3 in which theprism 30 and the holdingmember 40 and the supportingshaft 50 that support theprism 30 move along the supportingshaft 50 and do not collide with other portions. - Incidentally, in the present embodiment, the supporting
shaft 50 may be directly fitted into the throughholes housing 10 without providing the supportingbearings holes holes side plates housing 10 and the throughholes holes shaft 50. Two end portions of the supportingshaft 50 are inserted into the throughholes holes shaft 50, and the outer side surfaces of theside plates plates case 90 to close the throughholes - Further, in the present embodiment, the
plate spring 70 does not need to be provided along the thickness direction of thehousing 10 as long as it is provided to extend along the extending direction of the supportingshaft 50, that is, extend in a plane including the Y direction. For example, it may be provided so as to extend in a direction parallel to theend surface 42. Even in this case, thecenter portion 73 and theouter portions plate spring 70 are provided so as to always align in the Y direction. Incidentally, in the present embodiment, as for theplate spring 70, theouter portions center portion 73 is attached to the holdingmember 40, but theouter portions member 40 and thecenter portion 73 may be attached to the fixed portion. - Further, in the present embodiment, the members closing the supporting
holes bearings plates case 90. For example, members that simply close the supportingholes support bearings holes
Claims (15)
1. An optical element driving device comprising:
a fixed portion having supporting holes;
a holding member having a supporting portion supporting an optical element; and
a supporting shaft supporting the holding member,
wherein the fixed portion is disposed at positions of two end portions of the supporting shaft to support the supporting shaft in the supporting holes in a rockable manner, and a resin with viscoelasticity is filled between the outer peripheral surface of the supporting shaft which is rockable in the supporting holes and an inner peripheral surface of the supporting hole of the fixed portion.
2. The optical element driving device according to claim 1 , wherein the supporting shaft is provided with a center portion, and two end portions having a cylindrical shape and is supported in a rockable manner by the fixed portion at a position remotely from a center portion of the two end portions and the holding member is fixed by the supporting shaft situated near the center portion of the two end portions.
3. The optical element driving device according to claim 1 , wherein the optical element is a prism.
4. The optical element driving device according to claim 1 , wherein the resin with viscoelasticity is a damper gel.
5. The optical element driving device according to claim 2 , wherein the holding member has a through hole, and adhesive is filled between the outer peripheral surface of the supporting shaft in the through hole and the inner peripheral surface of the through hole so that the holding member and the supporting shaft is fixed.
6. The optical element driving device according to claim 2 , wherein the center portion has a first outer peripheral surface and a second outer peripheral surface,
the first outer peripheral surface being flushed with an outer peripheral surface of the cylindrical shape along an axis line of the cylindrical shape, the second outer peripheral surface being located further inside than the first outer peripheral surface, and
wherein the second outer peripheral surface is a flat surface, and is provided at a position cut out from an outer peripheral surface of the cylindrical shape, a portion of which is constituted by the first outer peripheral surface, to a depth exceeding the axis line.
7. The optical element driving device according to claim 1 , wherein the resin with viscoelasticity is also provided on two end surfaces of the supporting shaft.
8. The optical element driving device according to claim 1 , wherein the supporting shaft is fitted up to halfway from one end side of the supporting hole, and other part of the fixed portion closes other end side of the supporting hole.
9. The optical element driving device according to claim 1 , wherein the fixed portion comprises a housing having two opposing side plates, and supporting bearings having the supporting holes, the supporting bearings being fixed to the housing, and
wherein the two end portions of the supporting shaft are respectively fitted in the supporting holes of the supporting bearings,
10. The optical element driving device according to claim 9 , wherein the fixed portion comprises a case that has two opposing plates with the housing interposed therebetween and covers a device body, and
wherein the supporting shaft is fitted up to halfway from one end side of the supporting hole, and end surfaces of the supporting bearings respectively abut against the plates of the case, and abutting portions of the two plates close the supporting holes.
11. The optical element driving device according to claim 1 , wherein the supporting shaft extends in one predetermined direction, and the optical element driving device further comprises a plate spring which extends in a plane including the one predetermined direction and connects the fixed portion and the holding member.
12. The optical element driving device according to claim 11 , wherein the plate spring extends in the plane including a thickness direction of the fixed portion.
13. The optical element driving device according to claim 11 , wherein the plate spring comprises:
outer portions formed at two ends of the one predetermined direction and attached to one of the fixed portion or the holding member;
a center portion formed at a center of the one predetermined direction and attached to the other of the fixed portion or the holding member; and
a plurality of arm portions having a twisted shape and connecting the outer portions and the center portion, and
wherein the outer portions and the center portion extend in the other direction in the plane.
14. A camera device comprising the optical element driving device of claim 1 .
15. An electronic apparatus comprising the camera device of claim 14 .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/577,840 US20220137318A1 (en) | 2019-05-22 | 2022-01-18 | Optical Element Driving Device, Camera Device and Electronic Apparatus |
Applications Claiming Priority (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019096260A JP6710419B1 (en) | 2019-05-22 | 2019-05-22 | Optical element driving device, camera device, and electronic device |
JP2019-096260 | 2019-05-22 | ||
JP2019096233A JP6630942B1 (en) | 2019-05-22 | 2019-05-22 | Optical element driving device, camera device, and electronic device |
JP2019-096241 | 2019-05-22 | ||
JP2019-096233 | 2019-05-22 | ||
JP2019-096254 | 2019-05-22 | ||
JP2019096254A JP6709920B1 (en) | 2019-05-22 | 2019-05-22 | Optical element driving device, camera device, and electronic device |
JP2019096241A JP6635397B1 (en) | 2019-05-22 | 2019-05-22 | Optical element driving device, camera device, and electronic device |
US16/716,951 US11256061B2 (en) | 2019-05-22 | 2019-12-17 | Optical element driving device, camera device and electronic apparatus |
US17/577,840 US20220137318A1 (en) | 2019-05-22 | 2022-01-18 | Optical Element Driving Device, Camera Device and Electronic Apparatus |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/716,951 Continuation US11256061B2 (en) | 2019-05-22 | 2019-12-17 | Optical element driving device, camera device and electronic apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220137318A1 true US20220137318A1 (en) | 2022-05-05 |
Family
ID=73456803
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/716,951 Active 2040-08-13 US11256061B2 (en) | 2019-05-22 | 2019-12-17 | Optical element driving device, camera device and electronic apparatus |
US17/577,840 Abandoned US20220137318A1 (en) | 2019-05-22 | 2022-01-18 | Optical Element Driving Device, Camera Device and Electronic Apparatus |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/716,951 Active 2040-08-13 US11256061B2 (en) | 2019-05-22 | 2019-12-17 | Optical element driving device, camera device and electronic apparatus |
Country Status (1)
Country | Link |
---|---|
US (2) | US11256061B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220350108A1 (en) * | 2021-04-28 | 2022-11-03 | Samsung Electro-Mechanics Co., Ltd. | Reflective module assembly and camera module comprising the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4423495A (en) * | 1980-09-12 | 1983-12-27 | Olympus Optical Co., Ltd. | Method and apparatus for recording optically an information signal on a record medium along tracks |
US4465346A (en) * | 1972-10-25 | 1984-08-14 | Fraser David B | Optically stabilized telescope |
WO2002090819A2 (en) * | 2001-05-10 | 2002-11-14 | Massachusetts Institute Of Technology | Multi-legged equipment support for cameras, spotting telescopes and the like and jam-plate lock for same |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57177039A (en) | 1981-04-24 | 1982-10-30 | Sumitomo Chem Co Ltd | Rubber composition |
JP2557598Y2 (en) | 1992-06-16 | 1997-12-10 | 株式会社イナックス | Toilet seat and toilet lid provided with shock absorbing mechanism |
JPH0793783A (en) | 1993-09-21 | 1995-04-07 | Toshiba Corp | Mirror driving device |
JPH084761A (en) | 1994-06-16 | 1996-01-09 | Mitsubishi Heavy Ind Ltd | Damper for bearing |
JP4474064B2 (en) | 2001-02-28 | 2010-06-02 | キヤノン株式会社 | Drive motor |
JP2002267987A (en) | 2001-03-08 | 2002-09-18 | Canon Inc | Deflecting scanner |
CN101401023A (en) | 2006-02-06 | 2009-04-01 | 诺基亚公司 | Optical image stabilizer using gimballed prism |
JP2007310084A (en) | 2006-05-17 | 2007-11-29 | Alps Electric Co Ltd | Movable optical apparatus |
US9223126B2 (en) * | 2010-07-19 | 2015-12-29 | Applied Invention, Llc | Portable telescope |
JP5963641B2 (en) | 2012-10-26 | 2016-08-03 | アルプス電気株式会社 | Lens drive device |
CN205942054U (en) | 2016-08-24 | 2017-02-08 | 宁波舜宇光电信息有限公司 | Periscopic module of making a video recording |
-
2019
- 2019-12-17 US US16/716,951 patent/US11256061B2/en active Active
-
2022
- 2022-01-18 US US17/577,840 patent/US20220137318A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4465346A (en) * | 1972-10-25 | 1984-08-14 | Fraser David B | Optically stabilized telescope |
US4423495A (en) * | 1980-09-12 | 1983-12-27 | Olympus Optical Co., Ltd. | Method and apparatus for recording optically an information signal on a record medium along tracks |
WO2002090819A2 (en) * | 2001-05-10 | 2002-11-14 | Massachusetts Institute Of Technology | Multi-legged equipment support for cameras, spotting telescopes and the like and jam-plate lock for same |
Also Published As
Publication number | Publication date |
---|---|
US11256061B2 (en) | 2022-02-22 |
US20200371309A1 (en) | 2020-11-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN211603678U (en) | Optical element driving device, camera device, and electronic apparatus | |
JP6231045B2 (en) | Anti-tilt electromagnetic motor and lens device using the same | |
US20220137318A1 (en) | Optical Element Driving Device, Camera Device and Electronic Apparatus | |
US20220137327A1 (en) | Optical Element Driving Device, Camera Device and Electronic Apparatus | |
CN216052393U (en) | Optical unit | |
US20230052769A1 (en) | Optical unit having shake correction function, wiring member, and method of producing wiring member | |
US20230103186A1 (en) | Optical unit and smartphone | |
US9274304B2 (en) | Camera lens assembly | |
JP7075030B1 (en) | Optical element drive device, camera module, and camera mount device | |
CN210864161U (en) | Optical element driving device, camera device, and electronic apparatus | |
JP6710419B1 (en) | Optical element driving device, camera device, and electronic device | |
JP2023031806A (en) | optical unit | |
JP7392188B2 (en) | optical unit | |
JP6695949B2 (en) | Lens drive device, camera device, and electronic device | |
WO2022097388A1 (en) | Optical element driving device, camera module, and camera-equipped device | |
JP6630942B1 (en) | Optical element driving device, camera device, and electronic device | |
CN114265262A (en) | Optical unit | |
JP2008164870A (en) | Driving mechanism using piezoelectric element, camera module using the driving mechanism, and portable terminal with the camera module | |
JP2008131554A (en) | Imaging apparatus | |
JP2022155032A (en) | Optical unit, smartphone, and manufacturing method of optical unit | |
CN114355552A (en) | Optical unit | |
US12001123B2 (en) | Optical member driving device, camera device, and electronic apparatus | |
CN219202100U (en) | Optical unit | |
WO2022102306A1 (en) | Drive unit, lens driving device, camera module, and camera-equipped device | |
KR20240009844A (en) | Camera module with optical image stablizer and electronic device with the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NEW SHICOH MOTOR CO., LTD, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WASHIO, NORIYUKI;REEL/FRAME:058679/0970 Effective date: 20210622 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |