CN113109914A - Lens driving device, camera device, and electronic apparatus - Google Patents
Lens driving device, camera device, and electronic apparatus Download PDFInfo
- Publication number
- CN113109914A CN113109914A CN202010022967.5A CN202010022967A CN113109914A CN 113109914 A CN113109914 A CN 113109914A CN 202010022967 A CN202010022967 A CN 202010022967A CN 113109914 A CN113109914 A CN 113109914A
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- China
- Prior art keywords
- spring
- fixed
- driving device
- lens driving
- movable
- 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.)
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Links
- 239000011347 resin Substances 0.000 claims abstract description 47
- 229920005989 resin Polymers 0.000 claims abstract description 47
- 210000000707 wrist Anatomy 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000758 substrate 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
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
Abstract
The invention provides a lens driving device with high vibration reduction efficiency, a camera device and an electronic device. The lens driving device (1) is provided with a movable part, a fixed part and a spring. The movable section includes a holder (5) provided with a through hole (51) for mounting the lens body (12). The fixed part includes a cover (2) and a base (7), and is housed in the lens body (12) so that the movable part can move in the optical axis direction. The spring is arranged between the movable part and the fixed part and comprises a front side spring (3) and a rear side spring (6). The spring (3,6) has an inner part (30,60) fixed to the movable part, an outer part (33,65) fixed to the fixed part, and a wrist part (37,67) connecting the inner part (30,60) and the outer part (33, 65). Thus, between the inner side portion (30,60) including its boundary and the wrist portion (37,67) and between the outer side portion (33,65) including its boundary and the wrist portion (37,67), a viscoelastic resin is provided.
Description
Technical Field
The present invention relates to a lens driving device, a camera device, and an electronic device used in an electronic device such as a smartphone.
Background
Various camera devices equipped with an auto-focusing function have been proposed. As a document disclosing a technique related to such an apparatus, there is patent document 1. The camera device disclosed in patent document 1 includes a movable portion including a holder and a coil, a fixed portion including a frame, a magnet, a case, and a bottom cover, and an elastic block interposed between the movable portion and the fixed portion, and a vibration absorbing member made of a material such as a flexible rubber, a flexible spring, or a flexible rubber is provided between the holder of the movable portion and the bottom cover of the fixed portion. In this technique, a vibration damping action can be obtained by the vibration absorbing member when the movable portion is driven.
[ Prior art documents ]
[ patent document ]
[ patent document 1 ] Chinese CN101231375A gazette
Disclosure of Invention
[ problem ] to solve the problem
However, the technique of patent document 1 has a structure in which vibration absorbing members are attached only at four diagonal positions of the opening portion of the lens of the holding bracket, and therefore, there is a problem in that it is difficult to absorb vibration caused by driving of the movable portion.
The present invention has been made in view of the above problems, and an object thereof is to provide a lens driving device, a camera device, and an electronic apparatus with high vibration reduction efficiency.
[ MEANS FOR SOLVING PROBLEMS ] to solve the problems
In order to solve the above problem, a lens driving device according to a preferred embodiment of the present invention includes: a movable part including a holder provided with a through hole for mounting the lens body; a fixed part housed in the lens body such that the movable part is movable in an optical axis direction of the lens body; and a spring disposed between the movable portion and the fixed portion, the spring including an inner portion fixed to the movable portion, an outer portion fixed to the fixed portion, and a wrist portion connecting the inner portion and the outer portion, wherein a resin having viscoelasticity is provided between the inner portion including a boundary thereof and the wrist portion or between the outer portion including a boundary thereof and the wrist portion.
In this aspect, the spring may have a front spring and a rear spring each having the inner portion, the outer portion, and the arm portion, the front spring may be provided on a front side in the optical axis direction with respect to the rear spring, and the resin having the viscoelasticity may be provided on at least one of the front spring or the rear spring between the inner portion including a boundary thereof and the arm portion or between the outer portion including a boundary thereof and the arm portion.
The arm portion may extend from a direction perpendicular to the end edge of the inner portion or the outer portion or may be connected to the end edge of the inner portion or the outer portion from a direction perpendicular to the end edge.
In addition, at least one of the movable portion and the fixed portion may include a placement portion on which the inner portion or the outer portion of the resin having viscoelasticity is placed and fixed, and the resin having viscoelasticity may be further provided in a unit constituting the placement portion.
In addition, a convex portion protruding in the optical axis direction may be provided at least at one of a front end portion and a rear end portion of the movable portion, and the resin having the viscoelasticity may be stretched between a surface of the convex portion and a surface of the fixed portion facing the convex portion.
A camera device according to another preferred embodiment of the present invention includes the lens driving device.
An electronic device according to another preferred embodiment of the present invention includes the camera device.
[ Effect of the invention ]
The lens driving device of the present invention comprises: a movable part including a holder provided with a through hole for mounting the lens body; a fixed part which is accommodated in the lens body such that the movable part is movable in the optical axis direction of the lens body; and a spring disposed between the movable portion and the fixed portion. The spring has an inner part fixed to the movable part, an outer part fixed to the fixed part, and a wrist part connecting the inner part and the outer part, and a resin having viscoelasticity is provided between the inner part including a boundary thereof and the wrist part or between the outer part including a boundary thereof and the wrist part. Thus, the viscoelastic resin can efficiently absorb vibration generated by the forward and backward driving of the movable portion. Therefore, a lens driving device, a camera device, and an electronic apparatus with high vibration reduction efficiency can be provided.
Drawings
Fig. 1 is a front view of a smartphone 99 equipped with a camera device 11 including a lens drive device 1 according to an embodiment of the present invention.
Fig. 2 is a perspective view of the lens driving device 1 of fig. 1.
Fig. 3 is a perspective view of the lens driving device 1 of fig. 2 in an exploded view.
Fig. 4 is a perspective view of the lens driving device 1 of fig. 3 viewed from a different direction.
Fig. 5 is a view of the lens driving device 1 enlarged from the through hole 21 and showing a portion where the viscoelastic resin is provided.
Fig. 6 is a view of the lens driving device 1 enlarged from the through hole 71, in which a portion of the lens driving device 2 where the viscoelastic resin is provided is viewed.
Fig. 7 is an enlarged view of a portion of the lens driving device 1 of fig. 2 where the viscoelastic resin is provided.
Fig. 8 is an enlarged view of a portion of the lens driving device 1 of fig. 2 where the viscoelastic resin is provided.
Fig. 9 is an enlarged view of a portion of the lens driving device 1 of fig. 2 where the viscoelastic resin is provided.
Fig. 10 is an enlarged view of a portion of the lens driving device 1 of fig. 2 where the viscoelastic resin is provided.
[ description of reference ]
1. A lens driving device; 2. a cover; 3. a front side spring; 4. a magnet; 5. a support; 6. a rear side spring; 7. a base; 9. a coil; 10. a frame body; 11. a camera device; 12. a lens body; 13. an image sensor; 20. a front plate; 21. a through hole; 24. a side plate; 25. a step portion; 26. An anterior-lateral placement section; 28. bending the sheet; 30. an inner side portion; 31. a front inner side panel; 33. an outer side portion; 35. triangular plates; 37. a wrist portion; 51. a through hole; 55. a corner face; 57. a side surface; 60. An inner side portion; 61. the 1 st inner side sheet; 62. the 2 nd inner side sheet; 63. an arc-shaped piece; 65. an outer side portion; 67. a wrist portion; 70. a back plate; 71. a through hole; 74. a pillar portion; 75. an expansion section; 76. A posterior lateral placement section; 78. a terminal; 99. a smart phone; 531. a protrusion; 532. the 1 st convex part; 533. a front inner side placing part; 537. a 2 nd convex part; 538. a rear inner placing part.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in fig. 1, a camera device 11 including a lens driving device 1 as one embodiment of the present invention is housed in a housing of a smartphone 99.
The camera device 11 has a lens body 12 as an optical unit, an image sensor 13 that converts light incident via the lens body 12 into an image signal, and a lens driving device 1 that holds the lens body 12 and the image sensor 13 and drives the lens body 12.
Hereinafter, the optical axis direction of the lens body 12 is appropriately referred to as the Z direction, one direction orthogonal to the Z direction is appropriately referred to as the X direction, and a direction orthogonal to both the Z direction and the X direction is appropriately referred to as the Y direction. In addition, the side of the subject viewed from the lens body 12 may be referred to as the front side, and the opposite side (the side of the image sensor 13) may be referred to as the rear side. The anterior side corresponds to the + Z side, and the posterior side corresponds to the-Z side.
The lens driving device 1 houses and forms a holder 5, a coil 9, a front side spring 3, 2 rear side springs 6, and 4 magnets 4 in a housing 10 in which a base 7 and a cover 2 are combined. Of these parts, the fixed part includes a frame 10 and a magnet 4, and the movable part that moves relative to the fixed part includes a holder 5 and a coil 9.
The details of the structure of each part will be described below. The cover 2 has a quadrangular front plate 20, and side plates 24 extending from 4 sides of the front plate 20 to the-Z side. In the center of the front plate 20, a through-hole 21 is provided. At the four corners of the front panel 20, steps 25 in the shape of an isosceles right triangle are provided. The cover 2 is formed by pressing an iron-based plate. As shown in fig. 4 and 7, the rear surface of the step portion 25 is a flat surface, protrudes to the-Z side from the rear surface of the front plate 20, and is provided with a front outer mounting portion 26. A curved surface is formed between the front outer placing portion 26 and the rear surface of the front plate 20. The triangular plate 35 of the outer portion 33 of the front spring 3, which will be described later, is placed on the front outer placing portion 26. The through-hole 21 has a bent piece 28 bent and extended toward the-Z side inside the stepped portion 25 at the peripheral edge thereof. The magnets 4 in a rectangular parallelepiped shape are fixed to the inner surfaces of the side plates 24 corresponding to the sides of the quadrangle.
The base 7 has: a quadrangular rear plate 70 corresponding to the quadrangle of the front plate 20; 4 pillar portions 74 rising from four corners of the rear plate 70 to the + Z side; and 2 terminals 78 formed by embedding the rear plate 70 and partially protruding from the-Y side edge toward the-Z side. A through hole 71 is provided in the center of the rear plate 70. As shown in fig. 3 and 8, a proximal end portion of column portion 74 is provided with an expanding portion 75 that extends from column portion 74 to an inner isosceles right triangle shape. The expansion portion 75 is located at the + Z side position with respect to the front surface of the rear plate 70 with a steep step therebetween. The front surface of the expanding portion 75 is a flat surface, and a rear outer placing portion 76 is provided to place an outer portion 65 of a rear spring 6 described later. The rear outer mounting portion 76 is provided with a positioning projection of the rear spring 6. The terminal 78 is electrically connected to a substrate on which the image sensor 13 is mounted.
The holder 5 has an octagonal outer shape as viewed in the Z direction. A through hole 51 for attaching the lens body 12 is provided in the center of the holder 5. The holder 5 has 2 diagonal faces 55 chamfered at 2 diagonal faces 57 and 4 corners respectively opposed in the X direction and the Y direction. The center of the side surface 57 and the corner surface 55 in the Z direction is recessed inward, and the coil 9 is wound therein. The coil 9 and the magnet 4 are parallel and face each other with a slight gap therebetween. The driving force of the movable portion is generated by the magnet 4 and the coil 9.
As shown in fig. 3, the front end surface of the holder 5 is formed in an annular shape so as to protrude forward. A portion extending from an end of each corner face 55 toward a center portion of the side face 57 separated in the counterclockwise direction is formed with a protruding portion 531 protruding outward, and each protruding portion 531 is provided with a 1 st protruding portion 532 protruding toward the + Z side. The 1 st convex portion 532 has a shape in which one side of a quadrangle is rounded by being attached to the peripheral edge of the through-hole 51. The height of the 1 st convex part 532 is not higher than the front-rear width of the front side spring 3. Further, a front inner mounting portion 533 is provided on a plane between the end portion of the side surface 57 on the center side of the protruding portion 531 and the 1 st convex portion 532, and the inner portion 30 of the front spring 3 described later is mounted thereon. As shown in fig. 9, the circumferential end edge of the front inner mounting portion 533 is formed substantially along the radial direction. The front inner mounting portion 533 and the front end surface of the holder 5 are flush with each other, and their peripheries are recessed abruptly.
As shown in fig. 4, the rear end surface of the holder 5 is formed in an annular shape so as to protrude rearward. One end portion of each corner face 55 is partially protruded outward, and a 2 nd convex portion 537 protruded toward the-Z side is provided. The 2 nd convex portion 537 has a shape in which one side of a pentagon is rounded by being attached to the peripheral edge of the through-hole 51. The height of the 2 nd projecting portion 537 is higher than the front-rear width of the rear side spring 6. Further, the other end portion of each corner face 55 is partially protruded outward, and a rear inner mount portion 538 is provided on the plane of the rear surface thereof. In the rear inner mounting portion 538, an inner portion of a rear spring 6 described later is mounted. The other end of each corner face 55 corresponds to the end of the corner face 55 forming the projection 531. The rear inner mount 538 is provided with a positioning projection of the rear spring 6. As shown in fig. 10, the circumferential end edge of the rear inner mounting portion 538 is formed in a substantially radial direction. The rear inner mount portion 538 and the rear end surface of the holder 5 are flush with each other, and their peripheries are recessed sharply.
The front side spring 3 has an inner side 30, an outer side 33, and 4 arm portions 37 interposed therebetween. The inner portion 30 is annular and provided on the distal end surface along the periphery of the through hole 51 of the holder 5. The outer portion 33 is in the shape of a quadrangular ring. The outer side portion 33 has triangular pieces 35 at four corners thereof corresponding to the stepped portions 25 of the front plate 20. The triangular piece 35 has an isosceles triangular shape and is mounted and fixed on the front outer mounting portion 26 of the cover 2.
The arm 37 extends from an inner end of a position corresponding to the front inner mounting portion 533 of the bracket 5 in a counterclockwise direction substantially along the circumferential direction when viewed from the + Z side, is U-shaped and inverted at the triangular piece 35, and is connected to the bottom center of the triangular piece 35 as an outer end. As shown in fig. 9, the inner part 30 has a front inner sheet 31 protruding outward, and the inner end of the arm 37 extends circumferentially from the front inner sheet 31. The inner end width of the arm 37 is expanded so as to be close to the front inner sheet 31, and the interval from the annular portion of the inner part 30 is narrowed. As shown in fig. 7, the outer end of the arm 37 is extended in width so as to be close to the triangular piece 35, and is connected to the triangular piece 35 from a direction including a direction orthogonal to the bottom side of the triangular piece 35 and close thereto.
As shown in fig. 9, the inner portion 30 of the front spring 3 is fixed to the front end surface of the bracket 5, and particularly, the front inner piece 31 is mounted and fixed on the front inner mounting portion 533. The position of the circumferential end edge of the front inner mounting portion 533 substantially coincides with the position of the inner end boundary of the front inner sheet 31 and the wrist portion 37. As shown in fig. 7, the triangular piece 35 of the outer portion 33 of the front spring 3 is mounted and fixed on the front outer mounting portion 26 of the cover 2. The position and direction of the bottom side of the front outer mounting portion 26 substantially coincide with the position and direction of the bottom side of the triangular piece 35.
The 2 rear side springs 6 are separated in the diagonal direction and have a quadrangular shape as a whole. The 2 rear side springs 6 are electrically insulated from each other. Each of the 2 rear springs 6 has 1 inner portion 60, 2 outer portions 65, and 2 arm portions 67 sandwiched between the inner portion 60 and each of the 2 outer portions 65.
The inner part 60 has an arc piece 63, and a 1 st inner side piece 61 and a 2 nd inner side piece 62 connected to both ends and protruding outward. The arc piece 63 is provided on the rear end surface along the peripheral edge of the through hole 51 of the bracket 5. The 1 st inner sheet 61 and the 2 nd inner sheet 62 are provided with positioning holes of the bracket 5, and are placed and fixed on the rear inner placing portion 538 of the bracket 5. Each of the inner portions 60 has an electrical connection portion connected to the coil 9.
The arm portion 67 extends in a substantially circumferential direction in a counterclockwise direction as viewed from the + Z side from an inner end connected to the 1 st inner side sheet 61 or the 2 nd inner side sheet 62, is U-turned in an omega shape at a central portion of the outer side portion 65, and is connected to the outer side portion 65 as an outer end. As shown in fig. 10, the circumferential end edge of the 2 nd inner sheet 62 is formed substantially in the radial direction. The inner end of the arm 67 extends from the 2 nd inner end piece 62 thereof in the circumferential direction. The inner end width of the arm 67 is expanded to be close to the 2 nd inner sheet 62. Although not shown, the 1 st inner side sheet 61 is also the same as the 2 nd inner side sheet 62. Further, the inner portion 60 is narrow in interval from the arc piece 63. Further, on the 2 nd inner side piece 62 side, the interval between the arc piece 63 and the inner end of the arm 67 is narrow. As shown in fig. 8, the outer end width of the arm portion 67 is extended so as to be close to the outer portion 65, and is connected to the outer portion 65 from a direction including a direction orthogonal to the bottom side of the outer portion 65 and close thereto.
As shown in fig. 10, the inner portion 60 of the rear spring 6 is fixed to the rear end surface of the bracket 5, and particularly, the 1 st inner piece 61 and the 2 nd inner piece 62 are fitted into the positioning holes of the 1 st inner piece 61 and the 2 nd inner piece 62 and placed and fixed on the positioning projections of the rear inner placement portion 538. The position of the circumferential end edge of the rear inner mounting portion 538 substantially coincides with the position of the boundary between the 1 st inner sheet 61 and the 2 nd inner sheet 62 and the inner end of the wrist portion 67. As shown in fig. 8, the outer portion 65 of the rear spring 6 is fitted into the positioning projection of the base 7 in the positioning hole of the outer portion 65, and is placed and fixed on the rear outer placing portion 76 of the base 7. The position and direction of the bottom side of the rear outer placement portion 76 substantially coincide with the position and direction of the bottom side of the outer portion 65.
When a current is supplied to the coil 9 via the terminal 78 and the rear side spring 6, a Z-direction thrust is generated by an electromagnetic action between the coil 9 and the magnet 4, and the movable portion moves in the Z-direction together with the lens body 12.
In the present embodiment, a resin having viscoelasticity is provided at the following portions. 1. Between the 1 st boss 532 of the bracket 5 and the rear surface of the front plate 20 of the hood 2. 2. The 2 nd projecting portion 537 of the bracket 5 and the front surface of the rear plate 70 of the base 7. 3. Between the arm 37 of the front spring 3 and the triangular piece 35 of the outer part 33. 4. Between the wrist portion 67 and the outer side portion 65 of the rear side spring 6. 5. Between the wrist portion 37 and the inner side portion 30 of the front side spring 3. 6. Between the wrist portion 67 and the inner side portion 60 of the rear side spring 6. The resin having viscoelasticity is a so-called cushion gum, and hereinafter referred to as a viscoelastic resin.
Hereinafter, the description will be more specifically made. As shown in fig. 5, the 1 st convex portion 532 of the bracket 5 is opposed to the rear surface of the front plate 20 of the cover 2 in the Z direction, and the front surface of the 1 st convex portion 532 is closest to the rear surface of the front plate 20 in the movable portion. Viscoelastic resin is provided so as to span between the front surface of the 1 st convex part 532 and the rear surface of the front plate 20. The viscoelastic resin can be visually observed from diagonally forward through the through-hole 21 of the cover 2. Therefore, the viscoelastic resin can be supplied after the lens drive device 1 is assembled.
As shown in fig. 6, the 2 nd convex portion 537 of the holder 5 is opposed to the front surface of the rear plate 70 of the base 7 in the Z direction, and the rear surface of the 2 nd convex portion 537 is closest to the front surface of the rear plate 70 in the movable portion. A viscoelastic resin is provided so as to bridge between the rear surface of the 2 nd projecting portion 537 and the front surface of the rear plate 70. The viscoelastic resin can be visually observed from obliquely rearward through the through-hole 71 of the base 7. Therefore, the viscoelastic resin may be supplied after the lens driving device 1 is assembled.
As shown in fig. 7, a viscoelastic resin is provided between the arm portion 37 of the front side spring 3 and the triangular piece 35 of the outer portion 33. The viscoelastic resin may be provided at the boundary between the triangular plate 35 and the arm 37 and in a region including the outer end of the arm 37, and may be provided to include curved surfaces between the front outer mounting portion 26, and the rear surface of the front plate 20. In fig. 7, the viscoelastic resin is provided on the front side of the front side spring 3, but may be provided on the rear side or both sides.
As shown in fig. 8, a viscoelastic resin is provided between the arm portion 67 and the outer portion 65 of the rear side spring 6. The viscoelastic resin may be provided at the boundary between the outer portion 65 and the arm portion 67, in a region including the outer end of the arm portion 67, and may be provided to include a stepped surface between the rear outer placing portion 76, and the front surface of the rear plate 70. In fig. 8, the viscoelastic resin is provided on the rear side of the rear side spring 6, but may be provided on the front side or both sides.
As shown in fig. 9, a viscoelastic resin is provided between the arm portion 37 of the front spring 3 and the front inner sheet 31 of the inner portion 30. The viscoelastic resin may be provided in the boundary between the front inner sheet 31 and the arm 37, in a region including the outer end of the arm 37, or in an annular portion of the inner portion 30. The front inner placing portion 533 and the front end surface of the holder 5 may be provided so as to include the side surface recessed up to this point. In fig. 9, the viscoelastic resin is provided on the rear side of the front side spring 3, but may be provided on the front side or both sides.
As shown in fig. 10, a viscoelastic resin is provided between the arm portion 67 of the rear side spring 6 and the 2 nd inner side piece 62 of the inner side portion 60. The same applies to the wrist portion 67 of the rear side spring 6 and the 1 st inner side piece 61. The viscoelastic resin is provided at the boundary between the 1 st inner sheet 61 and the 2 nd inner sheet 62 and the arm 67, including the area of the inner end of the arm 67, and may be provided in the arc-shaped sheet 63 of the inner part 60 in the case of the 2 nd inner sheet 62. The rear inner mount portion 538 and the rear end surface of the bracket may be provided on the side surface recessed up to this point. In fig. 10, the viscoelastic resin is provided on the front side of the rear side spring 6, but may be provided on the rear side or both sides.
The above is the configuration details of the present embodiment. The lens driving device 1 of the present embodiment includes a movable portion, a fixed portion, and a spring. The movable part includes a holder 5 provided with a through hole 51 for mounting the lens body 12. The fixed part includes a cover 2 and a base 7, and is housed in the lens body 12 so that the movable part can move in the optical axis direction. The spring is disposed between the movable portion and the fixed portion, and includes a front side spring 3 and a rear side spring 6. The holder 5, which is a movable portion, is provided at its front end portion and rear end portion with a 1 st convex portion 532 and a 2 nd convex portion 537, which are convex portions projecting in the optical axis direction, respectively. Thus, a viscoelastic resin is provided between the surface of the 1 st convex portion 532 and the rear surface of the front plate 20 of the cover 2. Further, a viscoelastic resin is provided between the surface of the 2 nd projecting portion 537 and the front surface of the rear plate 70 of the base 7. This makes it possible to provide a viscoelastic resin with less variation. Therefore, it is possible to provide an electronic apparatus including the lens driving device 1, the camera device 11, and the smartphone 99 with a small variation in the vibration absorbing action.
The lens driving device 1 of the present embodiment includes inner portions 30 and 60 to which the springs 3 and 6 are fixed to the movable portion, outer portions 33 and 65 fixed to the fixed portion, and arm portions 37 and 67 that connect the inner portions 30 and 60 and the outer portions 33 and 65. Accordingly, viscoelastic resin is provided between the inner side portions 30,60 including the boundaries thereof and the wrist portions 37,67, and between the outer side portions 33,65 including the boundaries thereof and the wrist portions 37, 67. Thus, the viscoelastic resin can efficiently absorb the vibration generated by the forward and backward driving of the movable portion. Therefore, the lens driving device 1, the camera device 11, and the electronic apparatus having high vibration reduction efficiency can be provided.
In the above embodiment, the viscoelastic resin need not be provided on all portions. The viscoelastic resin may be provided only in a part thereof.
Claims (7)
1. A lens driving device is characterized by comprising:
a movable part including a holder provided with a through hole for mounting the lens body;
a fixed part housed in the lens body such that the movable part is movable in an optical axis direction of the lens body; and
a spring disposed between the movable portion and the fixed portion,
the spring has an inner part fixed to the movable part, an outer part fixed to the fixed part, and a wrist part connecting the inner part and the outer part,
a resin having viscoelasticity is provided between the inner side portion including the boundary and the arm portion or between the outer side portion including the boundary and the arm portion.
2. The lens driving device according to claim 1,
the spring has a front side spring and a rear side spring each having the inner side portion, the outer side portion, and the wrist portion,
the front spring is disposed on the front side in the optical axis direction with respect to the rear spring,
the resin having the viscoelasticity is provided on at least one of the front side spring and the rear side spring between the inner side portion including the boundary and the arm portion or between the outer side portion including the boundary and the arm portion.
3. The lens driving device according to claim 1 or 2,
the arm portion extends in a direction perpendicular to the end edge of the inner portion or the outer portion or is connected to the end edge of the inner portion or the outer portion from the direction perpendicular to the end edge.
4. The lens driving device according to claim 1 or 2,
at least one of the movable portion and the fixed portion has a placement portion on which the inner portion or the outer portion of the viscoelastic resin is placed and fixed,
the resin having viscoelasticity is also provided in a unit constituting the mounting portion.
5. The lens driving device according to claim 1 or 2,
a convex portion protruding in the optical axis direction is provided on at least one of a front end portion and a rear end portion of the movable portion,
the viscoelastic resin is stretched between the surface of the convex portion and the surface of the fixing portion facing the convex portion.
6. A camera device comprising the lens driving device according to any one of claims 1 to 5.
7. An electronic apparatus characterized by having the camera apparatus of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022967.5A CN113109914A (en) | 2020-01-09 | 2020-01-09 | Lens driving device, camera device, and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022967.5A CN113109914A (en) | 2020-01-09 | 2020-01-09 | Lens driving device, camera device, and electronic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113109914A true CN113109914A (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010022967.5A Pending CN113109914A (en) | 2020-01-09 | 2020-01-09 | Lens driving device, camera device, and electronic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113109914A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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