WO2017175505A1 - Dispositif d'entraînement de lentille - Google Patents

Dispositif d'entraînement de lentille Download PDF

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Publication number
WO2017175505A1
WO2017175505A1 PCT/JP2017/006794 JP2017006794W WO2017175505A1 WO 2017175505 A1 WO2017175505 A1 WO 2017175505A1 JP 2017006794 W JP2017006794 W JP 2017006794W WO 2017175505 A1 WO2017175505 A1 WO 2017175505A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
coil
holding member
lens holding
lens
Prior art date
Application number
PCT/JP2017/006794
Other languages
English (en)
Japanese (ja)
Inventor
田中　俊行
加藤　明彦
功武 菊池
寛志 長田
Original Assignee
アルプス電気株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2017175505A1 publication Critical patent/WO2017175505A1/fr

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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
    • 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
    • G03B35/00—Stereoscopic photography
    • G03B35/08—Stereoscopic photography by simultaneous recording
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof

Definitions

  • the present invention relates to a lens driving device.
  • a camera equipped with a camera module including a plurality of camera units is known (for example, see Patent Document 1).
  • the camera unit of Patent Document 1 includes a lens unit including a voice coil motor (VCM: Voice Coil Motor).
  • VCM Voice Coil Motor
  • a magnet is used for the above VCM. For this reason, when a plurality of lens units are mounted on one camera module, there is a problem of interference between magnets of each lens unit, which makes it difficult to design a magnetic circuit or the like of each lens unit. On the other hand, for example, if the lens units are arranged sufficiently apart from each other, interference between the magnets of each lens unit can be suppressed, but each lens unit may not be provided at a desired position, and the camera module as a whole is also enlarged. There is a problem to do.
  • an aspect of the present invention is to provide a lens driving device that includes a plurality of lens holding members and can be easily downsized while being easy to design.
  • One aspect of the lens driving device of the present invention includes a first lens holding member that can hold a lens body, and a second lens that can hold the lens body and is arranged in a predetermined direction with the first lens holding member.
  • a holding member, a main body that movably holds the first lens holding member and the second lens holding member, a first drive unit that drives the first lens holding member, and the second lens holding member A first drive unit that includes a first coil provided on the first lens holding member, and a magnet that faces the first coil.
  • 2 drive part has the 2nd coil provided in the 2nd lens holding member, and the magnet which counters the 2nd coil, and it is combined between the 1st coil and the 2nd coil.
  • a magnet is disposed, and the combined magnet is the first coil Pole unlike with the second coil side of the magnetic poles to each other, and also serves as said magnets and said magnets of said first driving portion and the second driving unit.
  • the first driving unit includes a first magnet disposed on the opposite side of the dual-purpose magnet with the first coil interposed therebetween in the predetermined direction
  • the second driving unit includes the first magnet in the predetermined direction.
  • a second magnet disposed on the opposite side of the dual-purpose magnet across two coils, and the magnetic pole on the first coil side of the first magnet and the magnetic pole on the first coil side of the dual-purpose magnet are mutually
  • the magnetic poles on the second coil side of the second magnet and the magnetic poles on the second coil side of the dual-purpose magnet may be the same as each other.
  • the main body includes a cover made of a magnetic material that houses the first lens holding member, the second lens holding member, the first driving unit, and the second driving unit, and the first magnet and the second magnet.
  • the magnet is fixed to the inner side surface of the cover, and the size of the dual-purpose magnet in the predetermined direction is larger than the size of the first magnet in the predetermined direction and the size of the second magnet in the predetermined direction. Good.
  • the main body includes a cover made of a non-magnetic material that houses the first lens holding member, the second lens holding member, the first driving unit, and the second driving unit, and the predetermined direction of the dual-purpose magnet
  • the dimension may be the same as the dimension of the first magnet in the predetermined direction and the dimension of the second magnet in the predetermined direction.
  • the first coil is wound around a first central axis perpendicular to the predetermined direction with respect to the first lens holding member, and the second coil is wound with respect to the second lens holding member. It is wound around a second central axis that is orthogonal to a predetermined direction and parallel to the first central axis, and the winding direction of the first coil and the winding direction of the second coil are the same as each other Also good.
  • the dual-purpose magnet has a first surface facing the first coil and a second surface facing the second coil, and extends in a direction perpendicular to the predetermined direction, and the magnetic pole of the first surface
  • the magnetic poles on the second surface may be different from each other.
  • a lens driving device that includes a plurality of lens holding members and can be reduced in size while facilitating design.
  • FIG. 1 is a perspective view showing the lens driving device of the first embodiment.
  • FIG. 2 is an exploded perspective view showing the lens driving device of the first embodiment.
  • FIG. 3 is an exploded perspective view showing a part of the lens driving device of the first embodiment.
  • FIG. 4 is a diagram illustrating the lens driving device according to the first embodiment, and is a cross-sectional view taken along the line IV-IV in FIG.
  • FIG. 5 is a partial cross-sectional perspective view showing a portion of the lens driving device of the first embodiment in a cutaway manner.
  • FIG. 6 is a cross-sectional view showing the lens driving device of the second embodiment.
  • the Y-axis direction is a predetermined direction in which the first lens holding member and the second lens holding member are arranged.
  • the Z-axis direction is one direction orthogonal to the Y-axis direction.
  • the X-axis direction is a direction orthogonal to both the Y-axis direction and the Z-axis direction.
  • the Z-axis direction may be referred to as “vertical direction”, the Y-axis direction may be referred to as “left-right direction (predetermined direction)”, and the X-axis direction may be referred to as “front-rear direction”.
  • the positive side (+ Z side) in the Z-axis direction may be referred to as “upper side”
  • the negative side ( ⁇ Z side) in the Z-axis direction may be referred to as “lower side”.
  • the positive side (+ Y side) in the Y-axis direction may be referred to as “right side”
  • the negative side ( ⁇ Y side) in the Y-axis direction may be referred to as “left side”.
  • the vertical direction, the horizontal direction, the front-rear direction, the upper side, the lower side, the right side, and the left side are simply names for explaining the positional relationship between the respective parts. And do not limit the posture.
  • FIG. 1 is a perspective view showing a lens driving device 10 of the present embodiment.
  • FIG. 2 is an exploded perspective view showing the lens driving device 10 of the present embodiment.
  • FIG. 3 is an exploded perspective view showing a part of the lens driving device 10 of the present embodiment.
  • FIG. 4 is a diagram showing the lens driving device 10 of the present embodiment, and is a cross-sectional view taken along the line IV-IV in FIG.
  • FIG. 5 is a partial cross-sectional perspective view showing the lens drive device 10 of the present embodiment in a cutaway manner.
  • the cover 20, the leaf spring holding member 25, the upper leaf spring member 50, and the support member 44 are not shown.
  • the lens driving device 10 includes a first lens holding member 31, a second lens holding member 32, a main body 10a, a first driving unit 30A, and a second driving unit 30B. .
  • the main body portion 10a includes a housing of the lens driving device 10, and is a portion that houses and holds the first lens holding member 31, the second lens holding member 32, the first driving portion 30A, and the second driving portion 30B. is there.
  • the first lens holding member 31 and the second lens holding member 32 can hold a lens body (not shown).
  • the first driving unit 30A drives the first lens holding member 31, and the second driving unit 30B drives the second lens holding member 32.
  • the first lens holding member 31 has a cylindrical shape that extends in the vertical direction about the first central axis J1.
  • the first central axis J1 is a virtual axis parallel to the vertical direction.
  • the first lens holding member 31 includes a cylindrical portion 31a and protrusions 35a, 35b, 35c, and 35d.
  • the cylindrical portion 31a has a cylindrical shape that extends in the vertical direction about the first central axis J1.
  • a thread groove is formed on the inner side surface of the cylindrical portion 31a along the circumferential direction.
  • the screw groove is a lens body holding mechanism, and the lens body is held by the first lens holding member 31 by fitting the lens body into the screw groove of the cylindrical portion 31a.
  • the optical axis of the lens body held by the first lens holding member 31 coincides with the first central axis J1. Therefore, the vertical direction, which is the Z-axis direction, is the optical axis direction of the lens body held by the first lens holding member 31.
  • the fixing of the lens body to the first lens holding member 31 is not limited to using a screw, and may be using an adhesive.
  • the projecting portions 35a to 35d project radially outward from the outer peripheral surface of the cylindrical portion 31a.
  • the protruding portion 35a and the protruding portion 35b protrude in opposite directions in the left-right direction.
  • the protruding portion 35c and the protruding portion 35d protrude in opposite directions in the front-rear direction.
  • the first lens holding member 31 is, for example, a resin member that is integrally molded using a mold.
  • the second lens holding member 32 has a cylindrical shape extending in the vertical direction about the second central axis J2.
  • the second central axis J2 is a virtual axis parallel to the vertical direction.
  • the second central axis J2 is located at the same position as the first central axis J1 in the front-rear direction and is located on the right side (+ Y side) of the first central axis J1.
  • the optical axis of the lens body held by the second lens holding member 32 coincides with, for example, the second central axis J2. Therefore, the vertical direction is also the optical axis direction of the lens body held by the second lens holding member 32.
  • the lens body held by the first lens holding member 31 and the lens body held by the second lens holding member 32 may be the same type of lens body or different types of lens bodies. Good.
  • the second lens holding member 32 is arranged side by side with the first lens holding member 31 in the left-right direction (predetermined direction). In FIG. 3, the second lens holding member 32 is disposed on the right side (+ Y side) of the first lens holding member 31.
  • the shape of the first lens holding member 31 and the shape of the second lens holding member 32 are the same.
  • Other configurations of the second lens holding member 32 are the same as the configurations of the first lens holding member 31.
  • the main body 10a holds the first lens holding member 31 and the second lens holding member 32 movably in the vertical direction (optical axis direction). As shown in FIG. 2, the main body 10 a includes a cover 20, a leaf spring holding member 25, an upper leaf spring member 50, lower leaf spring members 60 ⁇ / b> A and 60 ⁇ / b> B, and a base portion 70.
  • the cover 20 houses the first lens holding member 31, the second lens holding member 32, the first drive unit 30A, and the second drive unit 30B.
  • the cover 20 is made of a magnetic material made of a metal such as steel.
  • the cover 20 includes a top plate portion 21, side plate portions 22, and inner wall portions 23a, 23b, 23c, 23d, 24a, 24b, 24c, and 24d.
  • the top plate portion 21 has a plate shape that extends in a plane (XY plane) orthogonal to the vertical direction.
  • the shape viewed from the upper side to the lower side of the top plate 21 (hereinafter referred to as a plan view) is a substantially rectangular shape that is long in the left-right direction.
  • the top plate portion 21 is formed with top plate portion through holes 21 a and 21 b that penetrate the top plate portion 21 in the vertical direction.
  • the top plate portion through hole 21a and the top plate portion through hole 21b are formed side by side in the left-right direction.
  • the plan view shapes of the top plate through holes 21a and 21b are substantially circular.
  • the first central axis J1 passes through the center of the top plate through hole 21a.
  • the second central axis J2 passes through the center of the top plate through hole 21b.
  • the side plate portion 22 extends downward from the outer edge of the top plate portion 21. As shown in FIGS. 1 and 4, the side plate portion 22 has a frame shape surrounding the first lens holding member 31, the second lens holding member 32, the first drive unit 30 ⁇ / b> A, and the second drive unit 30 ⁇ / b> B.
  • the inner wall portions 23a to 23d extend downward from the inner edge of the top plate through hole 21a.
  • the inner wall portions 23a to 23d are arranged at equal intervals along the circumferential direction of the top plate through hole 21a.
  • the inner wall portions 23a to 23d are disposed between the adjacent protrusions 35a to 35d in the circumferential direction of the first central axis J1, and face the adjacent protrusions 35a to 35d in the circumferential direction.
  • the inner wall portion 23 a is disposed between the protruding portion 35 a and the protruding portion 35 c that are adjacent in the circumferential direction of the first central axis J ⁇ b> 1, and the adjacent protruding portion 35 a and the protruding portion 35 c are adjacent to each other. Opposing in the circumferential direction.
  • the inner wall portions 23a to 23d are disposed between the cylindrical portion 31a and a first coil 33 described later in the radial direction of the first central axis J1, and are opposed to the cylindrical portion 31a and the first coil 33 in the radial direction. Yes.
  • the inner wall portions 24a to 24d extend downward from the inner edge of the top plate through hole 21b.
  • the inner wall portions 24a to 24d are arranged at equal intervals along the circumferential direction of the top plate through hole 21b.
  • Other configurations of the inner wall portions 24a to 24d are the same as the configurations of the inner wall portions 23a to 23d except that the inner wall portions 24a to 24d are arranged with respect to the second lens holding member 32 and the second coil 34.
  • the leaf spring holding member 25 has a plate shape that extends in a plane (XY plane) orthogonal to the vertical direction.
  • the plate spring holding member 25 is formed with holding member through holes 25a and 25b that penetrate the plate spring holding member 25 in the vertical direction.
  • the planar view shapes of the holding member through holes 25a and 25b are substantially square.
  • the first central axis J1 passes through the center of the holding member through hole 25a.
  • the second central axis J2 passes through the center of the holding member through hole 25b.
  • the inner edge of the holding member through hole 25a is located on the outer side in the radial direction from the inner edge of the top plate through hole 21a.
  • the inner edge of the holding member through hole 25b is located on the radially outer side than the inner edge of the top plate through hole 21b.
  • the leaf spring holding member 25 is fitted inside the cover 20.
  • the leaf spring holding member 25 is fixed to the lower surface of the top plate portion 21 with an adhesive or the like.
  • the upper leaf spring member 50 has a plate shape extending in a plane (XY plane) perpendicular to the vertical direction, as shown in FIG.
  • the upper leaf spring member 50 is made of metal.
  • the upper leaf spring member 50 is manufactured, for example, by pressing.
  • the upper leaf spring member 50 includes a fixing portion 51, holding portions 52a, 52b, 53a, and 53b, and spring portions 52c and 53c.
  • the fixing portion 51 is formed with spring member through holes 51a and 51b that penetrate the fixing portion 51 in the vertical direction.
  • the spring member through hole 51a substantially overlaps the holding member through hole 25a in plan view.
  • the spring member through hole 51b substantially overlaps the holding member through hole 25b in plan view.
  • the fixing portion 51 is fixed to the lower surface of the leaf spring holding member 25 with an adhesive or the like.
  • the holding portions 52a and 52b are disposed inside the spring member through hole 51a.
  • the holding part 52a and the holding part 52b are disposed on opposite sides in the left-right direction with the first central axis J1 interposed therebetween.
  • Spring portions 52c are connected to both ends of the holding portions 52a and 52b in the front-rear direction.
  • the spring portion 52c connects the holding portions 52a and 52b to the inner edge of the spring member through hole 51a.
  • the spring portion 52c can be elastically deformed in the vertical direction.
  • the holding part 52a is fixed to the upper surface of the protruding part 35a of the first lens holding member 31, as shown in FIGS.
  • the holding part 52 b is fixed to the upper surface of the protruding part 35 b of the first lens holding member 31.
  • the holding parts 52a and 52b are fixed to the first lens holding member 31 with an adhesive or the like.
  • the holding portions 53a and 53b are disposed inside the spring member through-hole 51b as shown in FIG.
  • the holding portion 53a and the holding portion 53b are disposed on opposite sides in the left-right direction with the second central axis J2 interposed therebetween.
  • Spring portions 53c are connected to both ends of the holding portions 53a and 53b in the front-rear direction.
  • the spring portion 53c connects the holding portions 53a and 53b to the inner edge of the spring member through hole 51b.
  • the spring portion 53c can be elastically deformed in the vertical direction.
  • the holding portions 53a and 53b are fixed to the upper surface of the protruding portion of the second lens holding member 32, similarly to the holding portions 52a and 52b.
  • the lower leaf spring members 60 ⁇ / b> A and 60 ⁇ / b> B have a plate shape extending in a plane (XY plane) perpendicular to the vertical direction.
  • the lower leaf spring member 60A and the lower leaf spring member 60B are arranged side by side in the left-right direction.
  • the lower leaf spring members 60A and 60B are made of metal.
  • the lower leaf spring members 60A and 60B are manufactured, for example, by pressing.
  • the lower leaf spring member 60 ⁇ / b> A has a first portion 61 and a second portion 62 that are separated from each other.
  • the first portion 61 and the second portion 62 are disposed on opposite sides in the left-right direction with the first central axis J1 interposed therebetween.
  • the first portion 61 includes a fixing portion 61a, a holding portion 61b, and a spring portion 61c.
  • the fixing portion 61a extends in the front-rear direction.
  • the fixing portion 61a is fixed to the upper surface of the base portion 70 by appropriate means such as welding or adhesion.
  • the holding portion 61b is disposed inside the fixed portion 61a in the radial direction of the first central axis J1.
  • the holding part 61b extends in the circumferential direction of the first central axis J1.
  • Spring portions 61c are connected to both ends in the circumferential direction of the holding portion 61b.
  • the spring part 61c connects the holding part 61b and the fixing part 61a.
  • the spring portion 61c can be elastically deformed in the vertical direction.
  • the holding part 61b is fixed to the lower surface of the first lens holding member 31 with an adhesive or the like.
  • the second portion 62 includes a fixing portion 62a, a holding portion 62b, and a spring portion 62c.
  • the second portion 62 is the same as the first portion 61 except that the second portion 62 is reversed in the left-right direction across the first central axis J1.
  • the first lens holding member 31 is sandwiched in the vertical direction by the holding portions 52a and 52b of the upper leaf spring member 50 and the holding portions 61b and 62b of the lower leaf spring member 60A, and is movable in the vertical direction (optical axis direction). Is retained.
  • the lower leaf spring member 60B includes a third portion 63 and a fourth portion 64 that are separated from each other.
  • the third portion 63 and the fourth portion 64 are disposed on opposite sides in the left-right direction with the second central axis J2 interposed therebetween.
  • the configuration of the third portion 63 is the same as the configuration of the first portion 61 except that the third portion 63 is provided for the second lens holding member 32.
  • the configuration of the fourth portion 64 is the same as the configuration of the second portion 62 except that the fourth portion 64 is provided for the second lens holding member 32.
  • the second portion 62 and the third portion 63 are separated from each other and insulated from each other.
  • the second lens holding member 32 is sandwiched in the vertical direction by the holding portions 53a and 53b of the upper leaf spring member 50 and the holding portion of the lower leaf spring member 60B, and is held movably in the vertical direction (optical axis direction). Yes.
  • the base portion 70 has a substantially rectangular parallelepiped shape that is long in the left-right direction.
  • the base part 70 includes a base part main body 71, a first metal plate member 72, and a second metal plate member 73.
  • the base body 71 is made of resin, for example.
  • the base part main body 71 is formed with base part through holes 71a and 71b penetrating the base part main body 71 in the vertical direction.
  • the plan view shape of the base portion through-hole 71a is a substantially circular shape passing through the first central axis J1 through the center.
  • the plan view shape of the base portion through hole 71b is a substantially circular shape passing through the second central axis J2 through the center.
  • the inner edge of the base portion through hole 71a substantially overlaps the inner edge of the first lens holding member 31 in plan view.
  • the inner edge of the base portion through hole 71b substantially overlaps with the inner edge of the second lens holding member 32 in plan view.
  • the first metal plate member 72 and the second metal plate member 73 are embedded and held in the base body 71.
  • the base part 70 is manufactured, for example, by insert molding in which a resin is poured into a mold in which the first metal plate member 72 and the second metal plate member 73 are inserted.
  • the first metal plate member 72 includes a first member 72a and a second member 72b that are insulated from each other.
  • the 1st member 72a and the 2nd member 72b are arrange
  • the first member 72a is disposed at the left end ( ⁇ Y side) of one end of the base portion main body 71 in the front-rear direction (end on the + X side).
  • the second member 72b is disposed near the center in the left-right direction at one end in the front-rear direction (the end on the + X side) of the base portion main body 71.
  • the first member 72a has a first connection part 72c and a first terminal part 72d.
  • the first connection portion 72 c is exposed on the upper surface of the base portion 70.
  • a fixing portion 61a in the first portion 61 of the lower leaf spring member 60A is electrically connected to the first connection portion 72c.
  • the first terminal portion 72 d protrudes downward from the base portion main body 71.
  • the second member 72b has a second connection part 72e and a second terminal part 72f.
  • the second connection portion 72 e is exposed on the upper surface of the base portion 70.
  • a fixed portion 62a in the second portion 62 of the lower leaf spring member 60A is electrically connected to the second connection portion 72e.
  • the second terminal portion 72f protrudes downward from the base portion main body 71. Different polarities of an external power source (not shown) are connected to the first terminal portion 72d and the second terminal portion 72f, respectively.
  • the second metal plate member 73 includes a first member 73a and a second member 73b that are insulated from each other.
  • the 1st member 73a and the 2nd member 73b are arrange
  • the first member 73a is disposed near the center in the left-right direction at one end (the end on the + X side) in the front-rear direction of the base body 71.
  • the second member 73b is disposed at the right (+ Y side) end portion of one end (+ X side end portion) of the base portion main body 71 in the front-rear direction.
  • the third portion 63 of the lower leaf spring member 60B is electrically connected to the first connection portion 73c of the first member 73a.
  • the fourth portion 64 of the lower leaf spring member 60B is electrically connected to the second connection portion 73e of the second member 73b.
  • Different polarities of an external power source (not shown) are connected to the first terminal portion 73d of the first member 73a and the second terminal portion 73f of the second member 73b, respectively.
  • Other configurations of the first member 73 a are the same as the configurations of the first member 72 a of the first metal plate member 72.
  • Other configurations of the second member 73 b are the same as the configurations of the second member 72 b of the first metal plate member 72.
  • the first drive unit 30A and the second drive unit 30B are VCMs.
  • the first drive unit 30A includes a first coil 33 and a plurality of magnets.
  • the second drive unit 30B includes the second coil 34 and a plurality of magnets.
  • the first drive unit 30A and the second drive unit 30B drive the first lens holding member 31 and the second lens holding member 32 in the optical axis direction, respectively.
  • the first coil 33 is provided on the first lens holding member 31.
  • the first coil 33 is wound around the first central axis J ⁇ b> 1 with respect to the first lens holding member 31.
  • One end of the first coil 33 is electrically connected to the first portion 61 of the lower leaf spring member 60A. Accordingly, one end of the first coil 33 is electrically connected to the first member 72 a via the first portion 61.
  • the other end of the first coil 33 is electrically connected to the second portion 62 of the lower leaf spring member 60A. Thereby, the other end of the first coil 33 is electrically connected to the second member 72 b via the second portion 62.
  • the second coil 34 is provided on the second lens holding member 32.
  • the second coil 34 is wound around the second central axis J ⁇ b> 2 with respect to the second lens holding member 32.
  • the direction in which the first coil 33 is wound and the direction in which the second coil 34 is wound are the same.
  • the number of turns (number of turns) of the first coil 33 and the number of turns of the second coil 34 are the same.
  • One end of the second coil 34 is electrically connected to the third portion 63 of the lower leaf spring member 60B. As a result, one end of the second coil 34 is electrically connected to the first member 73 a via the third portion 63. The other end of the second coil 34 is electrically connected to the fourth portion 64 of the lower leaf spring member 60B. Thereby, the other end of the second coil 34 is electrically connected to the second member 73 b via the fourth portion 64.
  • first coil 33 and the second coil 34 schematically show the overall schematic shape.
  • the magnet of the first drive unit 30A faces the first coil 33 in the radial direction (left-right direction).
  • the magnet of the first drive unit 30 ⁇ / b> A includes a dual-purpose magnet 43 and a first magnet 41.
  • the magnet of the second drive unit 30B faces the second coil 34 in the radial direction (left-right direction).
  • the magnet of the second drive unit 30 ⁇ / b> B includes a dual-purpose magnet 43 and a second magnet 42.
  • the dual-purpose magnet 43 serves as a part (one) of the magnets of the first drive unit 30A and a part (one) of the magnets of the second drive unit 30B.
  • the combined magnet 43 is disposed between the first coil 33 and the second coil 34. As shown in FIG. 4, the dual-purpose magnet 43 is sandwiched and held in the vertical direction by an insulating support member 44 and a leaf spring holding member 25 disposed on the upper surfaces of the lower leaf spring members 60A and 60B. An upper leaf spring member 50 is interposed between the dual-purpose magnet 43 and the leaf spring holding member 25, and the upper surface of the dual-purpose magnet 43 is bonded to the leaf spring holding member 25 and the upper leaf spring member by an adhesive or the like. 50 is fixed.
  • the dual-purpose magnet 43 has a first surface 43 a that faces the first coil 33 and a second surface 43 b that faces the second coil 34.
  • the dual-purpose magnet 43 extends in the front-rear direction.
  • the dual-purpose magnet 43 has a substantially rectangular parallelepiped shape.
  • the magnetic pole on the first coil 33 side that is, the magnetic pole on the first surface 43a
  • the magnetic pole on the second coil 34 side that is, the magnetic pole on the second surface 43b are different from each other.
  • the magnetic pole of the first surface 43a is the S pole.
  • the magnetic pole of the second surface 43b is an N pole.
  • the first magnet 41 is disposed on the opposite side of the dual-purpose magnet 43 with the first coil 33 interposed therebetween in the left-right direction.
  • the first magnet 41 is fixed to the inner surface of the side plate portion 22 of the cover 20 with an adhesive or the like.
  • the upper end of the first magnet 41 is in contact with the lower surface of the upper leaf spring member 50.
  • the upper leaf spring member 50 and the leaf spring holding member 25 are sandwiched between the first magnet 41 and the top plate portion 21 of the cover 20.
  • the first magnet 41 has a first surface 41a facing the first coil 33, and a second surface 41b opposite to the first surface 41a (outside in the radial direction).
  • the second surface 41 b is in contact with the inner surface of the side plate portion 22.
  • the first magnet 41 extends in the front-rear direction.
  • the first magnet 41 has a substantially rectangular parallelepiped shape.
  • the first magnet 41 has a magnetic pole on the first coil 33 side, that is, a magnetic pole on the first surface 41a, and a magnetic pole on the opposite side to the first coil 33, that is, a magnetic pole on the second surface 41b.
  • the magnetic pole of the first surface 41a is the S pole.
  • the magnetic pole of the second surface 41b is an N pole.
  • the magnetic pole on the first coil 33 side of the first magnet 41 (the magnetic pole on the first surface 41a) and the magnetic pole on the first coil 33 side of the dual-purpose magnet 43 (the magnetic pole on the first surface 43a) are the same as each other (FIG. 4). Then, S pole).
  • the second magnet 42 is disposed on the opposite side of the dual-purpose magnet 43 with the second coil 34 interposed therebetween in the left-right direction.
  • the second magnet 42 is fixed to the inner surface of the side plate portion 22 of the cover 20 with an adhesive or the like.
  • the upper end of the second magnet 42 is in contact with the lower surface of the upper leaf spring member 50.
  • the upper leaf spring member 50 and the leaf spring holding member 25 are sandwiched between the second magnet 42 and the top plate portion 21 of the cover 20.
  • the second magnet 42 has a first surface 42a facing the second coil 34, and a second surface 42b opposite to the first surface 42a (outside in the radial direction).
  • the second surface 42 b is in contact with the inner surface of the side plate portion 22.
  • the second magnet 42 extends in the front-rear direction.
  • the second magnet 42 has a substantially rectangular parallelepiped shape.
  • the shape of the first magnet 41 and the shape of the second magnet 42 are, for example, the same. Therefore, in this embodiment, the length dimension (dimension in the X-axis direction), the width dimension (dimension in the Y-axis direction), and the height dimension (dimension in the Z-axis direction) of the first magnet 41 having a rectangular parallelepiped shape. Are the same as the second magnet 42.
  • the second magnet 42 is different from the magnetic pole on the second coil 34 side, that is, the magnetic pole on the first surface 42a, and the magnetic pole on the side opposite to the second coil 34, that is, the magnetic pole on the second surface 42b.
  • the magnetic pole of the first surface 42a is an N pole.
  • the magnetic pole of the second surface 42b is the S pole.
  • the magnetic pole on the second coil 34 side of the second magnet 42 (the magnetic pole on the first surface 42a) and the magnetic pole on the second coil 34 side of the dual-purpose magnet 43 (the magnetic pole on the second surface 43b) are the same as each other (FIG. 4). Then, N pole).
  • the magnetic pole on the first coil 33 side of each magnet facing the first coil 33 and the magnetic pole on the second coil 34 side of each magnet facing the second coil 34 are different from each other.
  • the horizontal dimension T3 of the combined magnet 43 is larger than the horizontal dimension T1 of the first magnet 41 and the horizontal dimension T2 of the second magnet 42.
  • the dimension T1 of the first magnet 41 and the dimension T2 of the second magnet 42 are, for example, the same.
  • the comparison of the dimension of each magnet in the left-right direction is a comparison on a virtual line that passes through the first magnet, the first coil, the dual-purpose magnet, the second coil, and the second magnet and is parallel to the left-right direction. . That is, even when the horizontal dimension of each magnet differs depending on the position in the vertical direction or the front-rear direction, it is only necessary that the horizontal dimension relationship between the magnets be established on the imaginary line.
  • the distance in the left-right direction between the first magnet 41 and the first coil 33 and the distance in the left-right direction between the dual-purpose magnet 43 and the first coil 33 are, for example, the same.
  • the distance in the left-right direction between the second magnet 42 and the second coil 34 and the distance in the left-right direction between the dual-purpose magnet 43 and the second coil 34 are, for example, the same.
  • the distance in the left-right direction between the first magnet 41 and the first coil 33 and the distance in the left-right direction between the second magnet 42 and the second coil 34 are, for example, the same.
  • the comparison of the distance in the left-right direction between each magnet and each coil is an imaginary parallel to the left-right direction passing through the first magnet, the first coil, the dual-purpose magnet, the second coil, and the second magnet. Comparison on line. That is, even if the distance in the left-right direction between each magnet and each coil differs depending on the position in the up-down direction or the front-rear direction, the distance in the left-right direction between each magnet and each coil on the above imaginary line It only has to be a relationship.
  • the magnetic flux emitted from the second surface 43 b that is an N pole passes through the second coil 34 in the left-right direction (rightward in FIG. 4) and enters the inner side in the radial direction of the second lens holding member 32. .
  • the magnetic flux entering the radially inner side of the second lens holding member 32 repels the magnetic flux from the second magnet 42 and proceeds to both sides in the vertical direction, and passes through the top plate portion 21 or the base portion 70 side in the left-right direction. Proceed to one lens holding member 31 side (left side).
  • the magnetic flux traveling in the top plate portion 21 or the base portion 70 side repels the magnetic flux from the first magnet 41 and enters the inner side in the radial direction of the first lens holding member 31, and moves the first coil 33 in the left-right direction (in FIG. 4). Passes rightward) and returns to the dual-purpose magnet 43 from the first surface 43a which is the S pole.
  • the cover 20 is formed of a magnetic metal, the magnetic flux generated from the dual-purpose magnet 43 is predominantly transmitted through the top plate portion 21, and the base portion 70 side is dominant. There are not many that pass.
  • inner wall portions 23c and 23d functioning as inner yokes are provided in the vicinity of both ends in the front-rear direction, which is the extending direction of the dual-purpose magnet 43, so that the magnetic flux from the dual-purpose magnet 43 is efficiently transferred to the first coil. 33 can be applied.
  • the inner wall portions 24a and 24b function as inner yokes, the magnetic flux from the dual-purpose magnet 43 can be efficiently applied to the second coil 34.
  • the magnetic flux emitted from the second surface 41 b that is the N pole enters the cover 20 from the inner surface of the side plate portion 22.
  • the magnetic flux that has entered the cover 20 travels in the side plate portion 22 to both sides in the vertical direction, and travels in the top plate portion 21 or the base portion 70 side to the first lens holding member 31 side (right side) in the left-right direction.
  • the magnetic flux traveling in the top plate portion 21 or the base portion 70 side repels the magnetic flux from the dual-purpose magnet 43 and enters the first lens holding member 31 in the radial direction, and moves the first coil 33 in the left-right direction (in FIG. ) And returns to the first magnet 41 from the first surface 41a which is the S pole.
  • the magnetic flux generated from the first magnet 41 is dominant when it passes through the top plate portion 21, and few passes through the base portion 70 side. Further, since the inner wall portions 23a and 23b functioning as the inner yoke are provided on the cover 20, the magnetic flux from the first magnet 41 can be efficiently applied to the first coil 33.
  • the magnetic flux emitted from the first surface 42 a that is the N pole passes through the second coil 34 in the left-right direction (leftward in FIG. 4), and enters the inner side in the radial direction of the second lens holding member 32. enter.
  • the magnetic flux that has entered the inside in the radial direction of the second lens holding member 32 repels the magnetic flux from the dual-purpose magnet 43 and proceeds to both sides in the vertical direction, and the second magnet 42 in the horizontal direction in the top plate portion 21 or the base portion 70 side. Go to the side (right side).
  • the magnetic flux traveling in the top plate portion 21 or the base portion 70 side enters the side plate portion 22, and returns to the second magnet 42 from the second surface 42 b that is the S pole via the side plate portion 22.
  • the magnetic flux generated from the second magnet 42 is dominant when it passes through the top plate portion 21, and few passes through the base portion 70 side. Further, since the inner wall portions 24c and 24d functioning as the inner yoke are provided on the cover 20, the magnetic flux from the second magnet 42 can be efficiently applied to the second coil 34.
  • the first coil 33 and the second coil 34 are applied based on Fleming's left-hand rule.
  • a vertical Lorentz force is generated.
  • the first lens holding member 31 and the second lens holding member 32 can be driven in the up-down direction, which is the optical axis direction of the lens body, through the first coil 33 and the second coil 34, respectively.
  • FIG. 4 shows a case where the first lens holding member 31 is stopped in a state of moving upward.
  • each holding part 52a, 52b, 61b, 62b is located above each fixing part 51, 61a, 62a, and applies downward elastic force to the first lens holding member 31.
  • the Lorentz force generated in the first coil 33 can be changed by changing the magnitude of the current supplied to the first coil 33. Accordingly, by adjusting the magnitude of the current supplied to the first coil 33, the position of the balance with the combined force of the elastic forces of the spring portions 52c, 61c, 62c is changed, and the upper and lower positions of the first lens holding member 31 are changed. The position of the direction can be adjusted.
  • the current is supplied to the first coil 33 by an external power source (not shown) connected to the first metal plate member 72. Specifically, the current flows from the external power source in the order of the first member 72a, the first portion 61, the first coil 33, the second portion 62, the second member 72b, or in the reverse order. Is supplied with current.
  • the direction of the magnetic flux passing through the second coil 34 is opposite to the direction of the magnetic flux passing through the first coil 33. Therefore, in order to move the second lens holding member 32 in the same vertical direction as the first lens holding member 31, a current is supplied to the second coil 34 in the opposite direction to that supplied to the first coil 33. What is necessary is just to supply.
  • the supply of current to the second coil 34 is performed by an external power source (not shown) as with the first coil 33.
  • the external power source that supplies current to the first coil 33 and the external power source that supplies current to the second coil 34 may be the same external power source or different external power sources.
  • a three-dimensional image can be taken by the camera units each including a lens body held by each lens holding member.
  • the resolution of the captured image can be improved by combining the images captured by the camera units and performing a predetermined process.
  • the dual-purpose magnet 43 disposed between the first coil 33 and the second coil 34 serves as the magnet of the first drive unit 30A and the magnet of the second drive unit 30B. Therefore, both the magnetic circuit on the second drive unit 30B side of the first drive unit 30A and the magnetic circuit on the first drive unit 30A side of the second drive unit 30B can be generated by the dual-purpose magnet 43. Therefore, magnetic flux interference does not occur between the drive units. Accordingly, even when the lens driving device 10 is downsized by bringing the first driving unit 30A and the second driving unit 30B close to each other, the design of the magnetic circuit is not difficult, and the design of the magnetic circuit is easily performed. It can be performed.
  • first driving unit 30A and the second driving unit 30B can be arranged at desired positions. As described above, according to the present embodiment, it is possible to obtain the lens driving device 10 that includes a plurality of lens holding members and can be downsized while simplifying the design.
  • the first magnet 41 is provided on the opposite side in the left-right direction across the first coil 33.
  • the magnetic pole on the first coil 33 side of the first magnet 41 and the magnetic pole on the first coil 33 side of the dual-purpose magnet 43 are the same. Therefore, the direction of the magnetic flux passing through the first coil 33 in the magnetic circuit generated by the first magnet 41 and the direction of the magnetic flux passing through the first coil 33 in the magnetic circuit generated by the dual-purpose magnet 43 are opposite to each other.
  • the direction of the current flowing through the first coil 33 in the portion where the magnetic flux from the first magnet 41 acts is opposite to the direction of the current flowing through the first coil 33 in the portion where the magnetic flux from the dual-purpose magnet 43 acts. The direction.
  • the first lens holding member 31 is stably in the optical axis direction with two magnets. It can be driven in the vertical direction.
  • the second drive unit 30B The same applies to the second drive unit 30B.
  • the magnetic cover 20 is provided, and the first magnet 41 is fixed to the inner surface of the cover 20. Therefore, the cover 20 functions as a yoke with respect to the first magnet 41, and the magnetic flux density of the magnetic circuit generated by the first magnet 41 can be increased. Accordingly, the Lorentz force generated on the first magnet 41 side of the first coil 33 can be increased, and the driving force applied to the first lens holding member 31 by the first driving unit 30A can be increased.
  • the size of the dual-purpose magnet 43 in the left-right direction is larger than the size of the first magnet 41 in the left-right direction. Therefore, the amount of magnetic flux emitted from the dual-purpose magnet 43 is larger than the amount of magnetic flux emitted from the first magnet 41.
  • the magnetic flux density of the magnetic circuit generated by the dual-purpose magnet 43 can be increased, and the Lorentz force generated on the dual-purpose magnet 43 side of the first coil 33 can be increased.
  • the Lorentz force generated can be balanced between the first magnet 41 side of the first coil 33 and the dual magnet 43 side of the first coil 33, and the first lens holding member 31 can be stably moved in the vertical direction.
  • Driving force can be applied.
  • the Lorentz force generated in the first coil 33 can be increased with a good balance in the left-right direction. The same applies to the second drive unit 30B.
  • the direction in which the first coil 33 is wound and the direction in which the second coil 34 is wound are the same. Therefore, the same type of coil can be used as each of the first coil 33 and the second coil 34. Thereby, the number of types of components used in the lens driving device 10 can be reduced, and the manufacturing cost of the lens driving device 10 can be reduced. Further, since the first coil 33 and the second coil 34 are prevented from being mistakenly assembled, the assembly efficiency of the lens driving device 10 can be improved and the productivity can be improved.
  • the number of turns (number of turns) of the first coil 33 and the second coil 34 is the same, and the shape of the first lens holding member 31 and the shape of the second lens holding member 32 are the same. Therefore, one type of lens holding member with the coil fixed can be made one.
  • the dual-purpose magnet 43 has a first surface 43a and a second surface 43b, and has a shape extending in the front-rear direction. Therefore, the dual-purpose magnet 43 can have a simple shape, and the dual-purpose magnet 43 can be easily manufactured. Thereby, the manufacturing cost of the lens drive device 10 can be reduced. In addition, the dual-purpose magnet 43 can be easily disposed in the front-rear direction between the first coil 33 and the second coil 34, and the Lorentz force generated in each coil by the magnetic circuit of the dual-purpose magnet 43 can be easily increased.
  • the inner wall portions 23a to 23d are arranged between the projecting portions 35a to 35d of the first lens holding member 31 in the circumferential direction. Therefore, it is possible to suppress the first lens holding member 31 from rotating around the first central axis J1 by the inner wall portions 23a to 23d. Further, since the inner wall portions 23 a to 23 d are disposed between the first coil 33 and the first lens holding member 31 in the radial direction, the inner wall portions 23 a to 23 d are used as inner yokes of the first magnet 41 and the combined magnet 43. While being able to function, it can suppress that the 1st lens holding member 31 moves to the radial direction of the 1st central axis J1. The same applies to the second lens holding member 32.
  • Three or more lens holding members may be provided.
  • three or more lens holding members may be arranged side by side in the left-right direction, and dual-purpose magnets may be arranged between the lens holding members in the left-right direction.
  • the number of magnets provided opposite to the first coil 33 and the number of magnets provided opposite to the second coil 34 may be three or more. In this case, three or more magnets may be provided around the first coil 33 and around the second coil 34 at equal intervals. In this case, the magnetic poles on the first coil 33 side in the three or more magnets may be the same. In three or more magnets, the magnetic poles on the second coil 34 side may be the same.
  • the number of magnets provided opposite to the first coil 33 and the number of magnets provided opposite to the second coil 34 may be one.
  • the dual-purpose magnet 43 serves as all of the magnets of the first drive unit 30A and all of the magnets of the second drive unit 30B, and the first lens holding member 31 and the second lens holding unit only by the Lorentz force generated by the dual-purpose magnet 43.
  • the member 32 may be driven in the vertical direction.
  • the number of magnets provided facing the first coil 33 and the number of magnets provided facing the second coil 34 may be different from each other.
  • the direction in which the first lens holding member 31 is driven and the direction in which the second lens holding member 32 is driven are not particularly limited, and may be directions other than the vertical direction.
  • the first lens holding member 31 and the second lens holding member 32 may be driven in the front-rear direction.
  • each coil is wound around an axis parallel to the front-rear direction.
  • the direction in which the first lens holding member 31 is driven and the direction in which the second lens holding member 32 is driven may be different from each other.
  • the dual-purpose magnet 43 may be divided into a plurality along the front-rear direction.
  • the magnets adjacent in the front-rear direction among the divided dual-purpose magnets 43 may be in contact with each other or may be separated from each other.
  • the dual-purpose magnet 43 may be configured by bonding a plurality of magnets along the left-right direction.
  • the shape of the dual-purpose magnet 43 is not particularly limited, and may be a plate shape having a relatively small size in the left-right direction. The same applies to the first magnet 41 and the second magnet 42.
  • the dimension T1 of the first magnet 41 and the dimension T2 of the second magnet 42 may be different from each other.
  • the distance between each coil and each magnet may be adjusted to adjust the Lorentz force applied to each lens holding member.
  • the magnetic force of each magnet may differ from each other.
  • the direction in which the first coil 33 is wound and the direction in which the second coil 34 is wound may be opposite to each other.
  • FIG. 6 is a cross-sectional view showing the lens driving device 110 of the present embodiment.
  • the cover 120 is made of a non-magnetic material.
  • the cover 120 is made of, for example, nonmagnetic metal or resin.
  • the other configuration of the cover 120 is the same as the configuration of the cover 20 of the first embodiment.
  • the horizontal dimension T4 of the dual-purpose magnet 143 is the same as the horizontal dimension T1 of the first magnet 41 and the horizontal dimension T2 of the second magnet 42.
  • the other dimensions of the dual-purpose magnet 143 are the same as those of the first magnet 41 and the second magnet 42.
  • the dual-purpose magnet 143 is magnetized so that the magnetic force is the same as that of the first magnet 41 and the second magnet 42.
  • Other configurations of the dual-purpose magnet 143 are the same as the configurations of the dual-purpose magnet 43 of the first embodiment.
  • Other configurations of the lens driving device 110 are the same as the configurations of the lens driving device 10 of the first embodiment.
  • the cover 120 since the cover 120 is made of a non-magnetic material, the cover 120 does not function as a yoke. Therefore, the magnetic flux density of the magnetic circuit generated by the first magnet 41 is not increased by the cover 120. Accordingly, by making the dimension T1 of the first magnet 41 and the dimension T4 of the dual-purpose magnet 143 the same, it is possible to easily balance the Lorentz force generated on both sides of the first coil 33 in the left-right direction. Specifically, if the distance in the left-right direction between the first magnet 41 and the first coil 33 and the distance in the left-right direction between the dual-purpose magnet 43 and the first coil 33 are the same, the left and right of the first coil 33 The Lorentz force generated on both sides of the direction can be made the same. The same applies to the second coil 34.
  • the dimension T1 of the first magnet 41, the dimension T2 of the second magnet 42, and the dimension T4 of the dual-purpose magnet 143 are the same, the same type of magnet can be used as each magnet. Thereby, the number of types of components of the lens driving device 110 can be reduced, and the manufacturing cost of the lens driving device 110 can be reduced. Further, since the first magnet 41, the second magnet 42, and the dual-purpose magnet 43 are prevented from being mistakenly assembled, the assembling efficiency of the lens driving device 110 can be improved and the productivity can be improved. Moreover, management of each magnet can be facilitated.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Studio Devices (AREA)

Abstract

Le problème décrit par la présente invention est de proposer un dispositif d'entraînement de lentille comprenant une pluralité d'éléments de maintien de lentille et capable de faciliter la conception tout en permettant une miniaturisation. La solution selon l'invention porte sur un dispositif d'entraînement de lentille qui comprend : un premier élément de maintien de lentille (31) ; un second élément de maintien de lentille (32) disposé côte à côte avec le premier élément de maintien de lentille le long d'une direction prescrite ; une première unité d'entraînement (30A) pour entraîner le premier élément de maintien de lentille ; une seconde unité d'entraînement (30B) pour entraîner le second élément de maintien de lentille. La première unité d'entraînement comprend une première bobine (33) disposée sur le premier élément de maintien de lentille et un aimant tourné vers la première bobine, et la seconde unité d'entraînement comprend une seconde bobine (34) disposée sur le second élément de maintien de lentille et un aimant tourné vers la seconde bobine. Un aimant combiné (43) est disposé entre la première bobine et la seconde bobine. L'aimant combiné a des pôles magnétiques mutuellement différents sur le premier côté bobine et le second côté bobine, et sert non seulement d'aimant pour la première unité d'entraînement mais sert également d'aimant pour la seconde unité d'entraînement.
PCT/JP2017/006794 2016-04-08 2017-02-23 Dispositif d'entraînement de lentille WO2017175505A1 (fr)

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Cited By (1)

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WO2020026515A1 (fr) * 2018-07-30 2020-02-06 アルプスアルパイン株式会社 Dispositif d'entraînement de lentille et module de caméra

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Publication number Priority date Publication date Assignee Title
TWI679484B (zh) * 2018-01-05 2019-12-11 大陸商信泰光學（深圳）有限公司 鏡頭裝置（二）
TWI793233B (zh) * 2018-03-20 2023-02-21 晶幣科技股份有限公司 多鏡頭攝像模組
JP2022024931A (ja) * 2020-07-28 2022-02-09 アルプスアルパイン株式会社 レンズホルダ駆動装置

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US20150316744A1 (en) * 2014-04-30 2015-11-05 Lite-On Electronics (Guangzhou) Limited Voice coil motor array module
WO2015178083A1 (fr) * 2014-05-19 2015-11-26 シャープ株式会社 Module de caméra et dispositif électronique

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Publication number Priority date Publication date Assignee Title
US20150316744A1 (en) * 2014-04-30 2015-11-05 Lite-On Electronics (Guangzhou) Limited Voice coil motor array module
WO2015178083A1 (fr) * 2014-05-19 2015-11-26 シャープ株式会社 Module de caméra et dispositif électronique

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Publication number Priority date Publication date Assignee Title
WO2020026515A1 (fr) * 2018-07-30 2020-02-06 アルプスアルパイン株式会社 Dispositif d'entraînement de lentille et module de caméra

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