WO2017175505A1 - Lens drive device - Google Patents

Lens drive device 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
French (fr)
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/en

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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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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

[Problem] To provide a lens drive device including a plurality of lens holding members and capable of facilitating design while allowing miniaturization. [Solution] An embodiment of the lens drive device according to the present invention comprises: a first lens holding member (31); a second lens holding member (32) arranged side by side with the first lens holding member along a prescribed direction; a first drive unit (30A) for driving the first lens holding member; a second drive unit (30B) for driving the second lens holding member. The first drive unit includes a first coil (33) provided on the first lens holding member and a magnet facing the first coil, and the second drive unit includes a second coil (34) provided on the second lens holding member and a magnet facing the second coil. A combined magnet (43) is arranged between the first coil and the second coil. The combined magnet has mutually different magnetic poles on the first coil side and the second coil side, and not only serves as a magnet for the first drive unit but also serves as a magnet for the second drive unit.

Description

レンズ駆動装置Lens drive device
　本発明は、レンズ駆動装置に関する。 The present invention relates to a lens driving device.
　複数のカメラユニットを含むカメラモジュールを搭載したカメラが知られている（例えば、特許文献１参照）。特許文献１のカメラユニットは、それぞれボイスコイルモータ（ＶＣＭ：Ｖｏｉｃｅ　Ｃｏｉｌ　Ｍｏｔｏｒ）を備えるレンズユニットを含む。 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).
特開２０１４－１０６２７４号公報JP 2014-106274 A
　上記のＶＣＭには磁石が用いられる。そのため、複数のレンズユニットを一つのカメラモジュールに搭載する場合、各レンズユニットの磁石同士の干渉が問題となり、各レンズユニットの磁気回路等の設計が困難になる問題があった。一方、例えば、レンズユニット同士を十分に離して配置すれば各レンズユニットの磁石同士の干渉は抑制できるが、各レンズユニット同士を所望する位置に設けられなくなる場合があり、カメラモジュール全体も大型化する問題がある。 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.
　本発明の一つの態様は、上記問題点に鑑みて、複数のレンズ保持部材を備え、設計を容易としつつ、小型化できるレンズ駆動装置を提供することを目的の一つとする。 In view of the above problems, 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.
　本発明のレンズ駆動装置の一つの態様は、レンズ体を保持可能な第１レンズ保持部材と、レンズ体を保持可能で、前記第１レンズ保持部材と所定方向に並んで配置された第２レンズ保持部材と、前記第１レンズ保持部材と前記第２レンズ保持部材とをそれぞれ移動可能に保持する本体部と、前記第１レンズ保持部材を駆動する第１駆動部と、前記第２レンズ保持部材を駆動する第２駆動部と、を備え、前記第１駆動部は、前記第１レンズ保持部材に設けられた第１コイルと、前記第１コイルと対向する磁石と、を有し、前記第２駆動部は、前記第２レンズ保持部材に設けられた第２コイルと、前記第２コイルと対向する磁石と、を有し、前記第１コイルと前記第２コイルとの間には、兼用磁石が配置され、前記兼用磁石は、前記第１コイル側の磁極と前記第２コイル側の磁極とが互いに異なり、かつ、前記第１駆動部の前記磁石と前記第２駆動部の前記磁石とを兼ねる。 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.
　前記第１駆動部は、前記所定方向において、前記第１コイルを挟んで前記兼用磁石と反対側に配置された第１磁石を有し、前記第２駆動部は、前記所定方向において、前記第２コイルを挟んで前記兼用磁石と反対側に配置された第２磁石を有し、前記第１磁石の前記第１コイル側の磁極と前記兼用磁石の前記第１コイル側の磁極とは、互いに同じであり、前記第２磁石の前記第２コイル側の磁極と前記兼用磁石の前記第２コイル側の磁極とは、互いに同じである構成としてもよい。 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, and 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.
　前記本体部は、前記第１レンズ保持部材、前記第２レンズ保持部材、前記第１駆動部および前記第２駆動部を収容する磁性体製のカバーを有し、前記第１磁石および前記第２磁石は、前記カバーの内側面に固定され、前記兼用磁石の前記所定方向の寸法は、前記第１磁石の前記所定方向の寸法および前記第２磁石の前記所定方向の寸法よりも大きい構成としてもよい。 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.
　前記本体部は、前記第１レンズ保持部材、前記第２レンズ保持部材、前記第１駆動部および前記第２駆動部を収容する非磁性体製のカバーを有し、前記兼用磁石の前記所定方向の寸法は、前記第１磁石の前記所定方向の寸法および前記第２磁石の前記所定方向の寸法と同じである構成としてもよい。 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.
　前記第１コイルは、前記第１レンズ保持部材に対して、前記所定方向と直交する第１中心軸周りに巻かれており、前記第２コイルは、前記第２レンズ保持部材に対して、前記所定方向と直交し前記第１中心軸と平行な第２中心軸周りに巻かれており、前記第１コイルの巻かれる向きと前記第２コイルの巻かれる向きとは、互いに同じである構成としてもよい。 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.
　前記兼用磁石は、前記第１コイルと対向する第１面と前記第２コイルと対向する第２面とを有し、かつ、前記所定方向と直交する方向に延び、前記第１面の磁極と前記第２面の磁極とは、互いに異なる構成としてもよい。 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.
　本発明の一つの態様によれば、複数のレンズ保持部材を備え、設計を容易としつつ、小型化できるレンズ駆動装置が提供される。 According to one aspect of the present invention, there is provided a lens driving device that includes a plurality of lens holding members and can be reduced in size while facilitating design.
図１は、第１実施形態のレンズ駆動装置を示す斜視図である。FIG. 1 is a perspective view showing the lens driving device of the first embodiment. 図２は、第１実施形態のレンズ駆動装置を示す分解斜視図である。FIG. 2 is an exploded perspective view showing the lens driving device of the first embodiment. 図３は、第１実施形態のレンズ駆動装置の部分を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a part of the lens driving device of the first embodiment. 図４は、第１実施形態のレンズ駆動装置を示す図であって、図１におけるIV－IV断面図である。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. 図５は、第１実施形態のレンズ駆動装置の部分を破断して示す部分断面斜視図である。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. 図６は、第２実施形態のレンズ駆動装置を示す断面図である。FIG. 6 is a cross-sectional view showing the lens driving device of the second embodiment.
　以下、図面を参照しながら、本発明の実施形態に係るレンズ駆動装置について説明する。なお、本発明の範囲は、以下の実施の形態に限定されず、本発明の技術的思想の範囲内で任意に変更可能である。また、以下の図面においては、各構成をわかりやすくするために、各構造における縮尺および数等を、実際の構造における縮尺および数等と異ならせる場合がある。 Hereinafter, a lens driving device according to an embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention. In the following drawings, the scale and number of each structure may be different from the scale and number of the actual structure in order to make each configuration easy to understand.
　以下の説明においては、各図に示した３次元直交座標系（ＸＹＺ座標系）を適宜参照しつつ、各部の位置関係について説明する。Ｙ軸方向は、第１レンズ保持部材と第２レンズ保持部材とが並ぶ所定方向とする。Ｚ軸方向は、Ｙ軸方向と直交する一方向とする。Ｘ軸方向は、Ｙ軸方向およびＺ軸方向の両方と直交する方向とする。 In the following description, the positional relationship of each part will be described with reference to the three-dimensional orthogonal coordinate system (XYZ coordinate system) shown in each drawing as appropriate. 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.
　また、以下の説明においては、Ｚ軸方向を「上下方向」と呼ぶ場合があり、Ｙ軸方向を「左右方向（所定方向）」と呼ぶ場合があり、Ｘ軸方向を「前後方向」と呼ぶ場合がある。Ｚ軸方向の正の側（＋Ｚ側）を「上側」と呼ぶ場合があり、Ｚ軸方向の負の側（－Ｚ側）を「下側」と呼ぶ場合がある。Ｙ軸方向の正の側（＋Ｙ側）を「右側」と呼ぶ場合があり、Ｙ軸方向の負の側（－Ｙ側）を「左側」と呼ぶ場合がある。なお、上下方向、左右方向、前後方向、上側、下側、右側および左側は、単に各部の位置関係を説明するための名称であり、実際の各部の位置関係および実際のレンズ駆動装置の使用態様および姿勢を限定しない。 In the following description, 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”. There is a case. The positive side (+ Z side) in the Z-axis direction may be referred to as “upper side”, and 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”, and the negative side (−Y side) in the Y-axis direction may be referred to as “left side”. Note that 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.
＜第１実施形態＞
　図１は、本実施形態のレンズ駆動装置１０を示す斜視図である。図２は、本実施形態のレンズ駆動装置１０を示す分解斜視図である。図３は、本実施形態のレンズ駆動装置１０の部分を示す分解斜視図である。図４は、本実施形態のレンズ駆動装置１０を示す図であって、図１におけるIV－IV断面図である。図５は、本実施形態のレンズ駆動装置１０の部分を破断して示す部分断面斜視図である。図３においては、カバー２０、板バネ保持部材２５、上側板バネ部材５０および支持部材４４の図示を省略している。 <First Embodiment>
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. In FIG. 3, the cover 20, the leaf spring holding member 25, the upper leaf spring member 50, and the support member 44 are not shown.
　レンズ駆動装置１０は、図１から図３に示すように、第１レンズ保持部材３１と、第２レンズ保持部材３２と、本体部１０ａと、第１駆動部３０Ａと、第２駆動部３０Ｂと、を備える。 As shown in FIGS. 1 to 3, 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. .
　本体部１０ａは、レンズ駆動装置１０の筐体を含み、第１レンズ保持部材３１、第２レンズ保持部材３２、第１駆動部３０Ａおよび第２駆動部３０Ｂを収容し、かつ、保持する部分である。第１レンズ保持部材３１および第２レンズ保持部材３２は、図示しないレンズ体を保持可能である。第１駆動部３０Ａは、第１レンズ保持部材３１を駆動し、第２駆動部３０Ｂは、第２レンズ保持部材３２を駆動する。以下、各部について詳細に説明する。 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. Hereinafter, each part will be described in detail.
　第１レンズ保持部材３１は、第１中心軸Ｊ１を中心として上下方向に延びる筒状である。第１中心軸Ｊ１は、上下方向と平行な仮想軸である。第１レンズ保持部材３１は、図３に示すように、筒状部３１ａと、突出部３５ａ，３５ｂ，３５ｃ，３５ｄと、を有する。 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. As shown in FIG. 3, the first lens holding member 31 includes a cylindrical portion 31a and protrusions 35a, 35b, 35c, and 35d.
　筒状部３１ａは、第１中心軸Ｊ１を中心として上下方向に延びる円筒状である。筒状部３１ａの内側面には、周方向に沿ってネジ溝が形成されている。ネジ溝はレンズ体の保持機構であり、筒状部３１ａのネジ溝にレンズ体が嵌め込まれることで第１レンズ保持部材３１にレンズ体が保持される。第１レンズ保持部材３１に保持されるレンズ体の光軸は、例えば、第１中心軸Ｊ１と一致する。したがって、Ｚ軸方向である上下方向は、第１レンズ保持部材３１に保持されるレンズ体の光軸方向となる。なお、レンズ体の第１レンズ保持部材３１への固定は、ネジによるものに限られず、接着剤によるものでもよい。 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. For example, 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.
　突出部３５ａ～３５ｄは、筒状部３１ａの外周面から径方向外側に突出している。突出部３５ａと突出部３５ｂとは、互いに左右方向の反対向きに突出している。突出部３５ｃと突出部３５ｄとは、互いに前後方向の反対向きに突出している。第１レンズ保持部材３１は、例えば、金型を用いて一体成型された樹脂製の部材である。 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.
　第２レンズ保持部材３２は、第２中心軸Ｊ２を中心として上下方向に延びる筒状である。第２中心軸Ｊ２は、上下方向と平行な仮想軸である。第２中心軸Ｊ２は、前後方向において第１中心軸Ｊ１と同じ位置にあり、第１中心軸Ｊ１の右側（＋Ｙ側）に離れた位置にある。 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.
　第２レンズ保持部材３２に保持されるレンズ体の光軸は、例えば、第２中心軸Ｊ２と一致する。したがって、上下方向は、第２レンズ保持部材３２に保持されるレンズ体の光軸方向でもある。第１レンズ保持部材３１に保持されるレンズ体と第２レンズ保持部材３２に保持されるレンズ体とは、互いに同じ種類のレンズ体であってもよいし、異なる種類のレンズ体であってもよい。 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.
　第２レンズ保持部材３２は、第１レンズ保持部材３１と左右方向（所定方向）に並んで配置されている。図３では、第２レンズ保持部材３２は、第１レンズ保持部材３１の右側（＋Ｙ側）に配置されている。第１レンズ保持部材３１の形状と第２レンズ保持部材３２の形状とは、互いに同じである。第２レンズ保持部材３２のその他の構成は、第１レンズ保持部材３１の構成と同様である。 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.
　本体部１０ａは、第１レンズ保持部材３１と第２レンズ保持部材３２とをそれぞれ上下方向（光軸方向）に移動可能に保持している。本体部１０ａは、図２に示すように、カバー２０と、板バネ保持部材２５と、上側板バネ部材５０と、下側板バネ部材６０Ａ，６０Ｂと、ベース部７０と、を有する。 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.
　カバー２０は、第１レンズ保持部材３１、第２レンズ保持部材３２、第１駆動部３０Ａおよび第２駆動部３０Ｂを収容している。本実施形態においてカバー２０は、鉄鋼等の金属からなる磁性体製である。カバー２０は、図１に示すように、天板部２１と、側板部２２と、内壁部２３ａ，２３ｂ，２３ｃ，２３ｄ，２４ａ，２４ｂ，２４ｃ，２４ｄと、を有する。 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. In this embodiment, the cover 20 is made of a magnetic material made of a metal such as steel. As shown in FIG. 1, 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.
　天板部２１は、上下方向と直交する平面（ＸＹ平面）に拡がる板状である。天板部２１の上側から下側に視た（以下、平面視）形状は、左右方向に長い略長方形状である。天板部２１には、天板部２１を上下方向に貫通する天板部貫通孔２１ａ，２１ｂが形成されている。天板部貫通孔２１ａと天板部貫通孔２１ｂとは、左右方向に並んで形成されている。天板部貫通孔２１ａ，２１ｂの平面視形状は、略円形状である。天板部貫通孔２１ａの中心には、第１中心軸Ｊ１が通る。天板部貫通孔２１ｂの中心には、第２中心軸Ｊ２が通る。 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.
　側板部２２は、天板部２１の外縁から下側に延びている。側板部２２は、図１および図４に示すように、第１レンズ保持部材３１、第２レンズ保持部材３２、第１駆動部３０Ａおよび第２駆動部３０Ｂの周りを囲む枠状である。 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.
　内壁部２３ａ～２３ｄは、図１に示すように、天板部貫通孔２１ａの内縁から下側に延びている。内壁部２３ａ～２３ｄは、天板部貫通孔２１ａの周方向に沿って等間隔に配置されている。内壁部２３ａ～２３ｄは、第１中心軸Ｊ１の周方向において隣り合う突出部３５ａ～３５ｄ同士の間に配置され、隣り合う突出部３５ａ～３５ｄと周方向に対向している。一例として、図５に示すように、内壁部２３ａは、第１中心軸Ｊ１の周方向において隣り合う突出部３５ａと突出部３５ｃとの間に配置され、隣り合う突出部３５ａおよび突出部３５ｃと周方向に対向している。 As shown in FIG. 1, 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. As an example, as shown in FIG. 5, 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.
　内壁部２３ａ～２３ｄは、第１中心軸Ｊ１の径方向において筒状部３１ａと後述する第１コイル３３との間に配置され、筒状部３１ａおよび第１コイル３３と径方向に対向している。 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.
　内壁部２４ａ～２４ｄは、図１に示すように、天板部貫通孔２１ｂの内縁から下側に延びている。内壁部２４ａ～２４ｄは、天板部貫通孔２１ｂの周方向に沿って等間隔に配置されている。内壁部２４ａ～２４ｄのその他の構成は、第２レンズ保持部材３２および第２コイル３４に対して配置されている点を除いて、内壁部２３ａ～２３ｄの構成と同様である。 As shown in FIG. 1, 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.
　板バネ保持部材２５は、図２に示すように、上下方向と直交する平面（ＸＹ平面）に拡がる板状である。板バネ保持部材２５には、板バネ保持部材２５を上下方向に貫通する保持部材貫通孔２５ａ，２５ｂが形成されている。保持部材貫通孔２５ａ，２５ｂの平面視形状は、略正方形状である。保持部材貫通孔２５ａの中心には、第１中心軸Ｊ１が通っている。保持部材貫通孔２５ｂの中心には、第２中心軸Ｊ２が通っている。 As shown in FIG. 2, 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.
　保持部材貫通孔２５ａの内縁は、図４に示すように、天板部貫通孔２１ａの内縁よりも径方向外側に位置している。保持部材貫通孔２５ｂの内縁は、天板部貫通孔２１ｂの内縁よりも径方向外側に位置している。板バネ保持部材２５は、カバー２０の内部に嵌め合わされている。板バネ保持部材２５は、天板部２１の下面に接着剤等によって固定されている。 As shown in FIG. 4, 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.
　上側板バネ部材５０は、図２に示すように、上下方向と直交する平面（ＸＹ平面）に拡がる板状である。上側板バネ部材５０は、金属製である。上側板バネ部材５０は、例えば、プレス加工によって製造される。 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.
　上側板バネ部材５０は、固定部５１と、保持部５２ａ，５２ｂ，５３ａ，５３ｂと、バネ部５２ｃ，５３ｃと、を有する。固定部５１には、固定部５１を上下方向に貫通するバネ部材貫通孔５１ａ，５１ｂが形成されている。バネ部材貫通孔５１ａは、平面視において保持部材貫通孔２５ａとほぼ重なっている。バネ部材貫通孔５１ｂは、平面視において保持部材貫通孔２５ｂとほぼ重なっている。固定部５１は、板バネ保持部材２５の下面に接着剤等によって固定されている。 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.
　保持部５２ａ，５２ｂは、バネ部材貫通孔５１ａの内側に配置されている。保持部５２ａと保持部５２ｂとは、第１中心軸Ｊ１を挟んで互いに左右方向の反対側に配置されている。保持部５２ａ，５２ｂの前後方向の両端には、それぞれバネ部５２ｃが接続されている。バネ部５２ｃは、保持部５２ａ，５２ｂをバネ部材貫通孔５１ａの内縁と接続している。バネ部５２ｃは、上下方向に弾性変形可能である。 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.
　保持部５２ａは、図４および図５に示すように、第１レンズ保持部材３１の突出部３５ａの上面に固定されている。保持部５２ｂは、第１レンズ保持部材３１の突出部３５ｂの上面に固定されている。保持部５２ａ，５２ｂは、接着剤等によって第１レンズ保持部材３１に固定される。 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.
　保持部５３ａ，５３ｂは、図２に示すように、バネ部材貫通孔５１ｂの内側に配置されている。保持部５３ａと保持部５３ｂとは、第２中心軸Ｊ２を挟んで互いに左右方向の反対側に配置されている。保持部５３ａ，５３ｂの前後方向の両端には、それぞれバネ部５３ｃが接続されている。バネ部５３ｃは、保持部５３ａ，５３ｂをバネ部材貫通孔５１ｂの内縁と接続している。バネ部５３ｃは、上下方向に弾性変形可能である。保持部５３ａ，５３ｂは、保持部５２ａ，５２ｂと同様に、第２レンズ保持部材３２の突出部の上面に固定されている。 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.
　下側板バネ部材６０Ａ，６０Ｂは、図３に示すように、上下方向と直交する平面（ＸＹ平面）に拡がる板状である。下側板バネ部材６０Ａと下側板バネ部材６０Ｂとは、左右方向に並んで配置されている。下側板バネ部材６０Ａ，６０Ｂは、金属製である。下側板バネ部材６０Ａ，６０Ｂは、例えば、プレス加工によって製造される。 As shown in FIG. 3, 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.
　下側板バネ部材６０Ａは、互いに分離された第１部分６１と、第２部分６２と、を有する。第１部分６１と第２部分６２とは、第１中心軸Ｊ１を挟んで互いに左右方向の反対側に配置されている。第１部分６１は、固定部６１ａと、保持部６１ｂと、バネ部６１ｃと、を有する。固定部６１ａは、前後方向に延びている。固定部６１ａは、ベース部７０の上面に溶接あるいは接着等の適宜の手段によって固定されている。 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.
　保持部６１ｂは、第１中心軸Ｊ１の径方向において、固定部６１ａよりも内側に配置されている。保持部６１ｂは、第１中心軸Ｊ１の周方向に延びている。保持部６１ｂの周方向の両端には、それぞれバネ部６１ｃが接続されている。バネ部６１ｃは、保持部６１ｂと固定部６１ａとを接続している。バネ部６１ｃは、上下方向に弾性変形可能である。保持部６１ｂは、第１レンズ保持部材３１の下面に接着剤等によって固定されている。 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.
　第２部分６２は、固定部６２ａと、保持部６２ｂと、バネ部６２ｃと、を有する。第２部分６２は、第１中心軸Ｊ１を挟んで左右方向に反転している点を除いて、第１部分６１と同様である。 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.
　第１レンズ保持部材３１は、上側板バネ部材５０の保持部５２ａ，５２ｂと下側板バネ部材６０Ａの保持部６１ｂ，６２ｂとによって上下方向に挟持され、上下方向（光軸方向）に移動可能に保持されている。 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.
　下側板バネ部材６０Ｂは、互いに分離された第３部分６３と、第４部分６４と、を有する。第３部分６３と第４部分６４とは、第２中心軸Ｊ２を挟んで互いに左右方向の反対側に配置されている。第３部分６３の構成は、第２レンズ保持部材３２に対して設けられる点を除いて第１部分６１の構成と同様である。第４部分６４の構成は、第２レンズ保持部材３２に対して設けられる点を除いて第２部分６２の構成と同様である。なお、第２部分６２と第３部分６３とは離間しており、互いに絶縁されている。 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.
　第２レンズ保持部材３２は、上側板バネ部材５０の保持部５３ａ，５３ｂと下側板バネ部材６０Ｂの保持部とによって上下方向に挟持され、上下方向（光軸方向）に移動可能に保持されている。 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.
　ベース部７０は、左右方向に長い略直方体状である。ベース部７０は、ベース部本体７１と、第１金属板部材７２と、第２金属板部材７３と、を有する。ベース部本体７１は、例えば、樹脂製である。 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.
　ベース部本体７１には、ベース部本体７１を上下方向に貫通するベース部貫通孔７１ａ，７１ｂが形成されている。ベース部貫通孔７１ａの平面視形状は、中心を第１中心軸Ｊ１が通る略円形状である。ベース部貫通孔７１ｂの平面視形状は、中心を第２中心軸Ｊ２が通る略円形状である。ベース部貫通孔７１ａの内縁は、平面視において第１レンズ保持部材３１の内縁とほぼ重なっている。ベース部貫通孔７１ｂの内縁は、平面視において第２レンズ保持部材３２の内縁とほぼ重なっている。 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.
　第１金属板部材７２および第２金属板部材７３は、ベース部本体７１に埋め込まれて保持されている。ベース部７０は、例えば、第１金属板部材７２および第２金属板部材７３が挿入された金型内に樹脂を流し込むインサート成型によって製造される。 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.
　第１金属板部材７２は、互いに絶縁された第１部材７２ａと、第２部材７２ｂと、を有する。第１部材７２ａと第２部材７２ｂとは、左右方向に間隔を空けて配置されている。第１部材７２ａは、ベース部本体７１の前後方向の一端（＋Ｘ側の端部）における左側（－Ｙ側）の端部に配置されている。第２部材７２ｂは、ベース部本体７１の前後方向の一端（＋Ｘ側の端部）における左右方向の中央近傍に配置されている。 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 | positioned at intervals in the left-right direction. 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.
　第１部材７２ａは、第１接続部７２ｃと、第１端子部７２ｄと、を有する。第１接続部７２ｃは、ベース部７０の上面において露出している。第１接続部７２ｃには、下側板バネ部材６０Ａの第１部分６１における固定部６１ａが電気的に接続されている。第１端子部７２ｄは、ベース部本体７１から下側に突出している。 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.
　第２部材７２ｂは、第２接続部７２ｅと、第２端子部７２ｆと、を有する。第２接続部７２ｅは、ベース部７０の上面において露出している。第２接続部７２ｅには、下側板バネ部材６０Ａの第２部分６２における固定部６２ａが電気的に接続されている。第２端子部７２ｆは、ベース部本体７１から下側に突出している。第１端子部７２ｄと第２端子部７２ｆとには、図示しない外部電源の異極がそれぞれ接続される。 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.
　第２金属板部材７３は、互いに絶縁された第１部材７３ａと、第２部材７３ｂと、を有する。第１部材７３ａと第２部材７３ｂとは、左右方向に間隔を空けて配置されている。第１部材７３ａは、ベース部本体７１の前後方向の一端（＋Ｘ側の端部）における左右方向の中央近傍に配置されている。第２部材７３ｂは、ベース部本体７１の前後方向の一端（＋Ｘ側の端部）における右側（＋Ｙ側）の端部に配置されている。 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 | positioned at intervals in the left-right direction. 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.
　第１部材７３ａの第１接続部７３ｃには、下側板バネ部材６０Ｂの第３部分６３が電気的に接続されている。第２部材７３ｂの第２接続部７３ｅには、下側板バネ部材６０Ｂの第４部分６４が電気的に接続されている。第１部材７３ａの第１端子部７３ｄと第２部材７３ｂの第２端子部７３ｆとには、図示しない外部電源の異極がそれぞれ接続される。第１部材７３ａのその他の構成は、第１金属板部材７２の第１部材７２ａの構成と同様である。第２部材７３ｂのその他の構成は、第１金属板部材７２の第２部材７２ｂの構成と同様である。 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.
　第１駆動部３０Ａおよび第２駆動部３０Ｂは、ＶＣＭである。第１駆動部３０Ａは、第１コイル３３と、複数の磁石と、を有している。第２駆動部３０Ｂは、第２コイル３４と、複数の磁石と、を有している。第１駆動部３０Ａおよび第２駆動部３０Ｂは、それぞれ第１レンズ保持部材３１および第２レンズ保持部材３２を光軸方向に駆動するものである。 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.
　第１コイル３３は、第１レンズ保持部材３１に設けられている。第１コイル３３は、第１レンズ保持部材３１に対して、第１中心軸Ｊ１周りに巻かれている。第１コイル３３の一端は、下側板バネ部材６０Ａの第１部分６１と電気的に接続されている。これにより、第１コイル３３の一端は、第１部分６１を介して第１部材７２ａと電気的に接続されている。第１コイル３３の他端は、下側板バネ部材６０Ａの第２部分６２と電気的に接続されている。これにより、第１コイル３３の他端は、第２部分６２を介して第２部材７２ｂと電気的に接続されている。 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.
　第２コイル３４は、第２レンズ保持部材３２に設けられている。第２コイル３４は、第２レンズ保持部材３２に対して、第２中心軸Ｊ２周りに巻かれている。本実施形態において第１コイル３３の巻かれる向きと第２コイル３４の巻かれる向きとは、互いに同じである。また、第１コイル３３の巻き回数（ターン数）と第２コイル３４の巻き回数とも、互いに同じになっている。 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. In the present embodiment, the direction in which the first coil 33 is wound and the direction in which the second coil 34 is wound are the same. Further, 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.
　第２コイル３４の一端は、下側板バネ部材６０Ｂの第３部分６３と電気的に接続されている。これにより、第２コイル３４の一端は、第３部分６３を介して第１部材７３ａと電気的に接続されている。第２コイル３４の他端は、下側板バネ部材６０Ｂの第４部分６４と電気的に接続されている。これにより、第２コイル３４の他端は、第４部分６４を介して第２部材７３ｂと電気的に接続されている。 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.
　なお、各図において第１コイル３３および第２コイル３４は、全体の概略形状を模式的に示している。 In each figure, the first coil 33 and the second coil 34 schematically show the overall schematic shape.
　第１駆動部３０Ａの磁石は、第１コイル３３と径方向（左右方向）に対向している。第１駆動部３０Ａの磁石は、兼用磁石４３と、第１磁石４１と、を含む。第２駆動部３０Ｂの磁石は、第２コイル３４と径方向（左右方向）に対向している。第２駆動部３０Ｂの磁石は、兼用磁石４３と、第２磁石４２と、を含む。 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.
　兼用磁石４３は、１つのみ設けられており、第１駆動部３０Ａの磁石と第２駆動部３０Ｂの磁石とを兼ねている。本実施形態においては、第１駆動部３０Ａの磁石は２つであり、第２駆動部３０Ｂの磁石は２つである。そのため、兼用磁石４３は、第１駆動部３０Ａの磁石の一部（１つ）と第２駆動部３０Ｂの磁石の一部（１つ）とを兼ねている。 Only one dual-purpose magnet 43 is provided and doubles as a magnet for the first drive unit 30A and a magnet for the second drive unit 30B. In the present embodiment, the first drive unit 30A has two magnets, and the second drive unit 30B has two magnets. Therefore, 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.
　兼用磁石４３は、第１コイル３３と第２コイル３４との間に配置されている。兼用磁石４３は、図４に示すように、下側板バネ部材６０Ａ，６０Ｂの上面に配置された絶縁性の支持部材４４と板バネ保持部材２５とによって上下方向に挟持されて保持されている。なお、兼用磁石４３と板バネ保持部材２５との間には、上側板バネ部材５０が介在しており、兼用磁石４３の上面は、接着剤等によって、板バネ保持部材２５および上側板バネ部材５０と固定されている。 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.
　兼用磁石４３は、図３および図４に示すように、第１コイル３３と対向する第１面４３ａと、第２コイル３４と対向する第２面４３ｂとを有する。兼用磁石４３は、前後方向に延びている。兼用磁石４３は、略直方体状である。 As shown in FIGS. 3 and 4, 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.
　兼用磁石４３は、第１コイル３３側の磁極、すなわち第１面４３ａの磁極と、第２コイル３４側の磁極、すなわち第２面４３ｂの磁極と、が互いに異なる。図４では、第１面４３ａの磁極は、Ｓ極である。第２面４３ｂの磁極は、Ｎ極である。 In the dual-purpose magnet 43, the magnetic pole on the first coil 33 side, that is, the magnetic pole on the first surface 43a, and the magnetic pole on the second coil 34 side, that is, the magnetic pole on the second surface 43b are different from each other. In FIG. 4, the magnetic pole of the first surface 43a is the S pole. The magnetic pole of the second surface 43b is an N pole.
　第１磁石４１は、左右方向において、第１コイル３３を挟んで兼用磁石４３と反対側に配置されている。第１磁石４１は、カバー２０の側板部２２の内側面に接着剤等によって固定されている。第１磁石４１の上端は、上側板バネ部材５０の下面と接触している。そして、上側板バネ部材５０と板バネ保持部材２５とは、第１磁石４１とカバー２０の天板部２１との間に挟持されている。 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.
　第１磁石４１は、第１コイル３３と対向する第１面４１ａと、第１面４１ａと反対側（径方向外側）の第２面４１ｂと、を有する。第２面４１ｂは、側板部２２の内側面と接触している。第１磁石４１は、図３に示すように、前後方向に延びている。第１磁石４１は、略直方体状である。 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. As shown in FIG. 3, the first magnet 41 extends in the front-rear direction. The first magnet 41 has a substantially rectangular parallelepiped shape.
　第１磁石４１は、第１コイル３３側の磁極、すなわち第１面４１ａの磁極と、第１コイル３３と反対側の磁極、すなわち第２面４１ｂの磁極と、が互いに異なる。図４では、第１面４１ａの磁極は、Ｓ極である。第２面４１ｂの磁極は、Ｎ極である。第１磁石４１の第１コイル３３側の磁極（第１面４１ａの磁極）と兼用磁石４３の第１コイル３３側の磁極（第１面４３ａの磁極）とは、互いに同じである（図４では、Ｓ極）。 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. In FIG. 4, 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).
　第２磁石４２は、左右方向において、第２コイル３４を挟んで兼用磁石４３と反対側に配置されている。第２磁石４２は、カバー２０の側板部２２の内側面に接着剤等によって固定されている。第２磁石４２の上端は、上側板バネ部材５０の下面と接触している。そして、上側板バネ部材５０と板バネ保持部材２５とは、第２磁石４２とカバー２０の天板部２１との間に挟持されている。 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.
　第２磁石４２は、第２コイル３４と対向する第１面４２ａと、第１面４２ａと反対側（径方向外側）の第２面４２ｂと、を有する。第２面４２ｂは、側板部２２の内側面と接触している。第２磁石４２は、図３に示すように、前後方向に延びている。第２磁石４２は、略直方体状である。本実施形態において、第１磁石４１の形状と第２磁石４２の形状とは、例えば、互いに同じである。したがって、本実施形態においては、直方体状をなした第１磁石４１の長さ寸法（Ｘ軸方向の寸法）、幅寸法（Ｙ軸方向の寸法）、および高さ寸法（Ｚ軸方向の寸法）は、それぞれ第２磁石４２と同じとなっている。 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. As shown in FIG. 3, the second magnet 42 extends in the front-rear direction. The second magnet 42 has a substantially rectangular parallelepiped shape. In the present embodiment, 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.
　第２磁石４２は、第２コイル３４側の磁極、すなわち第１面４２ａの磁極と、第２コイル３４と反対側の磁極、すなわち第２面４２ｂの磁極と、が互いに異なる。図４では、第１面４２ａの磁極は、Ｎ極である。第２面４２ｂの磁極は、Ｓ極である。第２磁石４２の第２コイル３４側の磁極（第１面４２ａの磁極）と兼用磁石４３の第２コイル３４側の磁極（第２面４３ｂの磁極）とは、互いに同じである（図４では、Ｎ極）。 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. In FIG. 4, 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).
　第１コイル３３と対向する各磁石の第１コイル３３側の磁極と、第２コイル３４と対向する各磁石の第２コイル３４側の磁極とは、互いに異なる。 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.
　兼用磁石４３の左右方向の寸法Ｔ３は、第１磁石４１の左右方向の寸法Ｔ１および第２磁石４２の左右方向の寸法Ｔ２よりも大きい。第１磁石４１の寸法Ｔ１と第２磁石４２の寸法Ｔ２とは、例えば、互いに同じである。 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.
　なお、本明細書において、各磁石同士の左右方向の寸法の比較は、第１磁石、第１コイル、兼用磁石、第２コイルおよび第２磁石を通り左右方向に平行な仮想線上における比較とする。すなわち、各磁石の左右方向の寸法が上下方向あるいは前後方向の位置によって異なる場合であっても、上記の仮想線上において各磁石同士の左右方向の寸法の関係が成り立っていればよい。 In addition, in this specification, 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.
　また、本明細書において、「各磁石同士の左右方向の寸法が互いに同じである」とは、各磁石同士の左右方向の寸法が厳密に同じである場合に加えて、各磁石同士の左右方向の寸法が互いに略同じである場合も含む。各磁石同士の左右方向の寸法が互いに略同じとは、各磁石同士の左右方向の寸法比が、例えば、０．９以上、１．１以下程度の場合を含む。 In addition, in this specification, “the horizontal dimension of each magnet is the same as each other” means that the horizontal dimension of each magnet is exactly the same, This includes the case where the dimensions are substantially the same. That the horizontal dimension of each magnet is substantially the same includes the case where the horizontal dimension ratio of each magnet is about 0.9 or more and 1.1 or less, for example.
　第１磁石４１と第１コイル３３との間の左右方向の距離と兼用磁石４３と第１コイル３３との間の左右方向の距離とは、例えば、互いに同じである。第２磁石４２と第２コイル３４との間の左右方向の距離と兼用磁石４３と第２コイル３４との間の左右方向の距離とは、例えば、互いに同じである。また、第１磁石４１と第１コイル３３との間の左右方向の距離と第２磁石４２と第２コイル３４との間の左右方向の距離とは、例えば、互いに同じである。 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. Further, 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.
なお、本明細書において、各磁石と各コイルとの間の左右方向の距離の比較は、第１磁石、第１コイル、兼用磁石、第２コイルおよび第２磁石を通り左右方向に平行な仮想線上における比較とする。すなわち、各磁石と各コイルとの間の左右方向の距離が上下方向あるいは前後方向の位置によって異なる場合であっても、上記の仮想線上において各磁石と各コイルとの間の左右方向の距離の関係が成り立っていればよい。 In this specification, 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.
　兼用磁石４３において、Ｎ極である第２面４３ｂから放出された磁束は、第２コイル３４を左右方向（図４では右向き）に通過して、第２レンズ保持部材３２の径方向内側に入る。第２レンズ保持部材３２の径方向内側に入った磁束は、第２磁石４２からの磁束と反発して上下方向両側に進み、天板部２１内あるいはベース部７０側を通って左右方向の第１レンズ保持部材３１側（左側）に進む。天板部２１内あるいはベース部７０側を進む磁束は、第１磁石４１からの磁束と反発して第１レンズ保持部材３１の径方向内側に入り、第１コイル３３を左右方向（図４では右向き）に通過して、Ｓ極である第１面４３ａから兼用磁石４３に戻る。 In the dual-purpose magnet 43, 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.
　なお、本実施形態においては、カバー２０が磁性体製の金属で形成されているため、兼用磁石４３から発せられた磁束は、天板部２１内を通るものが支配的となり、ベース部７０側を通るものは多くはない。また、兼用磁石４３の延在方向である前後方向の両端部近傍には、内ヨークとして機能する内壁部２３ｃ，２３ｄが設けられているため、兼用磁石４３からの磁束を効率的に第１コイル３３に作用させることができる。同様に、内壁部２４ａ，２４ｂが内ヨークとして機能することで、兼用磁石４３からの磁束を効率的に第２コイル３４に作用させることができる。 In the present embodiment, since 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. Further, 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. Similarly, since 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.
　第１磁石４１において、Ｎ極である第２面４１ｂから放出された磁束は、側板部２２の内側面からカバー２０内に入る。カバー２０内に入った磁束は、側板部２２内を上下方向両側に進み、天板部２１内あるいはベース部７０側を左右方向の第１レンズ保持部材３１側（右側）に進む。天板部２１内あるいはベース部７０側を進む磁束は、兼用磁石４３からの磁束と反発して第１レンズ保持部材３１の径方向内側に入り、第１コイル３３を左右方向（図４では左向き）に通過して、Ｓ極である第１面４１ａから第１磁石４１に戻る。 In the first magnet 41, 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.
　なお、第１磁石４１から発せられた磁束は、天板部２１内を通るものが支配的となっており、ベース部７０側を通るものは少ない。また、内ヨークとして機能する内壁部２３ａ，２３ｂがカバー２０に設けられているので、第１磁石４１からの磁束を効率的に第１コイル３３に作用させることができる。 In addition, 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.
　第２磁石４２において、Ｎ極である第１面４２ａから放出された磁束は、第２コイル３４を左右方向（図４では左向き）に通過して、第２レンズ保持部材３２の径方向内側に入る。第２レンズ保持部材３２の径方向内側に入った磁束は、兼用磁石４３からの磁束と反発して上下方向両側に進み、天板部２１内あるいはベース部７０側を左右方向の第２磁石４２側（右側）に進む。天板部２１内あるいはベース部７０側を進む磁束は、側板部２２内に入り、側板部２２を介して、Ｓ極である第２面４２ｂから第２磁石４２に戻る。 In the second magnet 42, 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.
　なお、第２磁石４２から発せられた磁束は、天板部２１内を通るものが支配的であり、ベース部７０側を通るものは少ない。また、内ヨークとして機能する内壁部２４ｃ，２４ｄがカバー２０に設けられているので、第２磁石４２からの磁束を効率的に第２コイル３４に作用させることができる。 In addition, 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.
　各磁石によって、上記のような磁気回路が生じた状態で、第１コイル３３および第２コイル３４に電流を流すと、フレミングの左手の法則に基づいて、第１コイル３３および第２コイル３４に上下方向のローレンツ力が生じる。これにより、第１コイル３３と第２コイル３４とのそれぞれを介して、第１レンズ保持部材３１と第２レンズ保持部材３２とをレンズ体の光軸方向である上下方向に駆動することができる。 When a current is passed through the first coil 33 and the second coil 34 in a state where the magnetic circuit as described above is generated by each magnet, the first coil 33 and the second coil 34 are applied based on Fleming's left-hand rule. A vertical Lorentz force is generated. Thereby, 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. .
　具体的に本実施形態においては、第１コイル３３に平面視で時計回り向きの電流を流した場合には、第１コイル３３には上向きのローレンツ力が生じて、第１レンズ保持部材３１が上向きに移動する。一方、第１コイル３３に、平面視で反時計回り向きの電流を流した場合には、第１コイル３３には下向きのローレンツ力が生じて、第１レンズ保持部材３１が下向きに移動する。 Specifically, in the present embodiment, when a current flowing clockwise in the plan view is passed through the first coil 33, an upward Lorentz force is generated in the first coil 33, and the first lens holding member 31 is moved. Move upward. On the other hand, when a counterclockwise current is passed through the first coil 33 in a plan view, a downward Lorentz force is generated in the first coil 33, and the first lens holding member 31 moves downward.
　第１レンズ保持部材３１が上下方向に移動すると、上側板バネ部材５０のバネ部５２ｃおよび下側板バネ部材６０Ａのバネ部６１ｃ，６２ｃが弾性変形し、第１レンズ保持部材３１が移動する向きと逆向きの弾性力を第１レンズ保持部材３１に加える。第１レンズ保持部材３１の移動は、第１コイル３３に生じたローレンツ力とバネ部５２ｃ，６１ｃ，６２ｃによる弾性力の合成力とが上下方向において釣り合う箇所で停止する。　 When the first lens holding member 31 moves in the vertical direction, the spring portion 52c of the upper leaf spring member 50 and the spring portions 61c and 62c of the lower leaf spring member 60A are elastically deformed, and the direction in which the first lens holding member 31 moves. A reverse elastic force is applied to the first lens holding member 31. The movement of the first lens holding member 31 stops at a point where the Lorentz force generated in the first coil 33 and the resultant force of the elastic force by the spring portions 52c, 61c, 62c balance in the vertical direction. *
なお、図４においては、第１レンズ保持部材３１が上側に移動した状態で停止している場合を示している。この場合、各保持部５２ａ，５２ｂ，６１ｂ，６２ｂは、各固定部５１，６１ａ，６２ａよりも上側に位置しており、第１レンズ保持部材３１に下向きの弾性力を加えている。これは、第２レンズ保持部材３２についても同様である。 FIG. 4 shows a case where the first lens holding member 31 is stopped in a state of moving upward. In this case, 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 same applies to the second lens holding member 32.
　第１コイル３３に生じるローレンツ力は、第１コイル３３に供給される電流の大きさを変更することで変えることができる。したがって、第１コイル３３に供給する電流の大きさを調整することで、各バネ部５２ｃ，６１ｃ，６２ｃの弾性力の合成力との釣り合いの位置を変えて、第１レンズ保持部材３１の上下方向の位置を調整することができる。第１コイル３３への電流の供給は、第１金属板部材７２に接続された図示しない外部電源によって行われる。具体的には、外部電源から、第１部材７２ａ、第１部分６１、第１コイル３３、第２部分６２、第２部材７２ｂの順、あるいはこの逆順に電流が流れることによって、第１コイル３３に電流が供給される。 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.
　本実施形態において第２コイル３４を通過する磁束の向きは、第１コイル３３を通過する磁束の向きと反対向きである。そのため、第２レンズ保持部材３２を第１レンズ保持部材３１と上下方向の同じ向きに移動させるためには、第２コイル３４に第１コイル３３に供給するのと反対向きとなるように電流を供給すればよい。第２コイル３４への電流の供給は、第１コイル３３と同様に、図示しない外部電源によって行われる。 In this embodiment, 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.
　第１コイル３３に電流を供給する外部電源と、第２コイル３４に電流を供給する外部電源とは、同じ外部電源であってもよいし、異なる外部電源であってもよい。 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.
　レンズ駆動装置１０を備えたカメラにおいては、各レンズ保持部材に保持されるレンズ体を含んでそれぞれ構成されるカメラユニットによって、例えば、立体的な画像の撮影が可能である。また、例えば、各カメラユニットによって撮影された各画像を合成し、所定の処理を行うことで、撮影された画像の解像度を向上させることもできる。 In the camera provided with the lens driving device 10, for example, a three-dimensional image can be taken by the camera units each including a lens body held by each lens holding member. In addition, for example, the resolution of the captured image can be improved by combining the images captured by the camera units and performing a predetermined process.
　本実施形態によれば、第１コイル３３と第２コイル３４との間に配置された兼用磁石４３が、第１駆動部３０Ａの磁石と第２駆動部３０Ｂの磁石とを兼ねている。そのため、第１駆動部３０Ａの第２駆動部３０Ｂ側の磁気回路および第２駆動部３０Ｂの第１駆動部３０Ａ側の磁気回路の両方を、兼用磁石４３によって生じさせることができる。したがって、各駆動部同士間において磁束の干渉が生じない。これにより、第１駆動部３０Ａと第２駆動部３０Ｂとを近づけてレンズ駆動装置１０を小型化する場合であっても、磁気回路の設計が困難になることがなく、容易に磁気回路の設計を行うことができる。また、第１駆動部３０Ａと第２駆動部３０Ｂとを所望する位置に配置することができる。以上により、本実施形態によれば、複数のレンズ保持部材を備え、設計を容易としつつ、小型化できるレンズ駆動装置１０が得られる。 According to the present embodiment, 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. Further, the 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.
　また、本実施形態によれば、第１コイル３３を挟んで左右方向の反対側に第１磁石４１が設けられている。第１磁石４１の第１コイル３３側の磁極と兼用磁石４３の第１コイル３３側の磁極とは、互いに同じである。そのため、第１磁石４１によって生じる磁気回路において第１コイル３３を通る磁束の向きと、兼用磁石４３によって生じる磁気回路において第１コイル３３を通る磁束の向きとは、互いに逆向きとなる。また、第１磁石４１からの磁束が作用する部分における第１コイル３３を流れる電流の向きと、兼用磁石４３からの磁束が作用する部分における第１コイル３３を流れる電流の向きとは、互いに逆向きである。これにより、第１コイル３３に電流を流した際に、左右方向の両側において生じるローレンツ力の向きを同じにできる。このように、第１コイル３３の左右方向の両側に第１磁石４１と兼用磁石４３とが設けられていることで、２つの磁石で安定して第１レンズ保持部材３１を光軸方向である上下方向に駆動させることができる。これは、第２駆動部３０Ｂについても同様である。 Further, according to the present embodiment, 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. Thereby, when a current is passed through the first coil 33, the direction of the Lorentz force generated on both sides in the left-right direction can be made the same. Thus, by providing the first magnet 41 and the dual-purpose magnet 43 on both sides of the first coil 33 in the left-right 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 same applies to the second drive unit 30B.
　また、本実施形態によれば、磁性体製のカバー２０が設けられ、カバー２０の内側面に第１磁石４１が固定されている。そのため、カバー２０が第１磁石４１に対してヨークとして機能し、第１磁石４１よって生じる磁気回路の磁束密度を大きくできる。これにより、第１コイル３３の第１磁石４１側に生じるローレンツ力を大きくすることができ、第１駆動部３０Ａによって第１レンズ保持部材３１に加えられる駆動力を大きくできる。 Further, according to the present embodiment, 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.
　一方、兼用磁石４３の左右方向の寸法は、第１磁石４１の左右方向の寸法よりも大きい。そのため、兼用磁石４３から放出される磁束の量は、第１磁石４１から放出される磁束の量よりも多い。これにより、兼用磁石４３によって生じる磁気回路の磁束密度を大きくすることができ、第１コイル３３の兼用磁石４３側に生じるローレンツ力を大きくすることができる。したがって、第１コイル３３の第１磁石４１側と第１コイル３３の兼用磁石４３側とで、発生するローレンツ力のバランスを取ることができ、第１レンズ保持部材３１に安定して上下方向の駆動力を加えることができる。以上のように、本実施形態によれば、第１コイル３３に生じるローレンツ力を左右方向のバランスよく大きくすることができる。これは、第２駆動部３０Ｂについても同様である。 On the other hand, 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. Thereby, 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. Accordingly, 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. As described above, according to the present embodiment, 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.
　また、本実施形態によれば、第１コイル３３の巻かれる向きと第２コイル３４の巻かれる向きとは同じである。そのため、第１コイル３３および第２コイル３４として、それぞれ同じ種類のコイルを用いることができる。これにより、レンズ駆動装置１０に使用される部品の種類数を少なくでき、レンズ駆動装置１０の製造コストを低減できる。また、第１コイル３３と第２コイル３４とを取り違えて組み立てることが防止されるため、レンズ駆動装置１０の組み立て効率を向上でき、生産性を向上できる。 Further, according to the present embodiment, 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.
　また、第１コイル３３と第２コイル３４との巻き回数（ターン数）は、同じであり、第１レンズ保持部材３１の形状と第２レンズ保持部材３２の形状とも同じである。そのため、コイルが固定された状態のレンズ保持部材の種類を一つとすることができる。 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.
　また、本実施形態によれば、兼用磁石４３は、第１面４３ａと第２面４３ｂとを有し、前後方向に延びる形状である。そのため、兼用磁石４３を簡単な形状とでき、兼用磁石４３の製造を容易にできる。これにより、レンズ駆動装置１０の製造コストを低減できる。また、兼用磁石４３を、第１コイル３３と第２コイル３４との間の前後方向の全体に亘って配置しやすく、兼用磁石４３の磁気回路によって各コイルに生じるローレンツ力を大きくしやすい。 Further, according to the present embodiment, 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.
　また、本実施形態によれば、内壁部２３ａ～２３ｄが第１レンズ保持部材３１の突出部３５ａ～３５ｄ同士の周方向の間に配置されている。そのため、内壁部２３ａ～２３ｄによって第１レンズ保持部材３１が第１中心軸Ｊ１周りに回転することを抑制できる。また、内壁部２３ａ～２３ｄが第１コイル３３と第１レンズ保持部材３１との径方向の間に配置されているため、内壁部２３ａ～２３ｄを第１磁石４１および兼用磁石４３の内ヨークとして機能させることができるとともに、第１レンズ保持部材３１が第１中心軸Ｊ１の径方向に動くことを抑制できる。これらは、第２レンズ保持部材３２についても同様である。 Further, according to the present embodiment, 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.
　なお、本発明は上述の実施形態に限られず、他の構成を採用することもできる。上述の実施形態と同様の構成については、適宜同一の符号を付すことにより説明を省略する場合がある。 Note that the present invention is not limited to the above-described embodiment, and other configurations may be employed. About the structure similar to the above-mentioned embodiment, description may be abbreviate | omitted by attaching | subjecting the same code | symbol suitably.
　レンズ保持部材は、３つ以上設けられていてもよい。この場合、例えば、３つ以上のレンズ保持部材が左右方向に並んで配置され、レンズ保持部材同士の左右方向の間にそれぞれ兼用磁石が配置される構成としてもよい。 Three or more lens holding members may be provided. In this case, for example, 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.
　また、第１コイル３３と対向して設けられる磁石および第２コイル３４と対向して設けられる磁石は、それぞれ３つ以上であってもよい。この場合、３つ以上の磁石は、第１コイル３３の周りおよび第２コイル３４の周りに等間隔に設けられる構成としてもよい。また、この場合、３つ以上の磁石において第１コイル３３側の磁極は、互いに同じとしてもよい。３つ以上の磁石において第２コイル３４側の磁極は、互いに同じとしてもよい。 Also, 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.
　また、第１コイル３３と対向して設けられる磁石および第２コイル３４と対向して設けられる磁石は、１つであってもよい。この場合、兼用磁石４３が第１駆動部３０Ａの磁石の全てと第２駆動部３０Ｂの磁石の全てとを兼ね、兼用磁石４３によって生じるローレンツ力のみで第１レンズ保持部材３１および第２レンズ保持部材３２が上下方向に駆動されてもよい。また、第１コイル３３と対向して設けられる磁石の数と、第２コイル３４と対向して設けられる磁石の数とは、互いに異なっていてもよい。 Also, 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. In this case, 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. Further, 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.
　また、第１レンズ保持部材３１が駆動される方向および第２レンズ保持部材３２が駆動される方向は、特に限定されず、上下方向以外の方向であってもよい。例えば、第１レンズ保持部材３１および第２レンズ保持部材３２は、前後方向に駆動されてもよい。この場合、各コイルは前後方向と平行な軸周りに巻かれる。また、第１レンズ保持部材３１が駆動される方向と、第２レンズ保持部材３２が駆動される方向とは、互いに異なっていてもよい。 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. For example, the first lens holding member 31 and the second lens holding member 32 may be driven in the front-rear direction. In this case, 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.
　また、兼用磁石４３は、前後方向に沿って複数に分割されていてもよい。この場合、分割された兼用磁石４３のうち前後方向に隣り合う磁石は、互いに接触していてもよいし、互いに離れていてもよい。また、兼用磁石４３は、左右方向に沿って複数の磁石が貼り合わされて構成されていてもよい。兼用磁石４３の形状は、特に限定されず、左右方向の寸法が比較的小さい板状であってもよい。これらは、第１磁石４１および第２磁石４２についても同様である。 Further, the dual-purpose magnet 43 may be divided into a plurality along the front-rear direction. In this case, 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.
　また、第１磁石４１の寸法Ｔ１と第２磁石４２の寸法Ｔ２とは、互いに異なってもよい。この場合、例えば、各コイルと各磁石との間の距離を調整して、各レンズ保持部材に加えられるローレンツ力を調整してもよい。また、各磁石の磁力は互いに異なっていてもよい。 Further, the dimension T1 of the first magnet 41 and the dimension T2 of the second magnet 42 may be different from each other. In this case, for example, the distance between each coil and each magnet may be adjusted to adjust the Lorentz force applied to each lens holding member. Moreover, the magnetic force of each magnet may differ from each other.
　また、第１コイル３３が巻かれる向きと第２コイル３４が巻かれる向きとは、互いに逆向きであってもよい。 Further, 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.
＜第２実施形態＞
　図６は、本実施形態のレンズ駆動装置１１０を示す断面図である。図６に示すレンズ駆動装置１１０においてカバー１２０は、非磁性体製である。カバー１２０は、例えば、非磁性の金属製または樹脂製である。カバー１２０のその他の構成は、第１実施形態のカバー２０の構成と同様である。 Second Embodiment
FIG. 6 is a cross-sectional view showing the lens driving device 110 of the present embodiment. In the lens driving device 110 shown in FIG. 6, 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.
　レンズ駆動装置１１０において兼用磁石１４３の左右方向の寸法Ｔ４は、第１磁石４１の左右方向の寸法Ｔ１および第２磁石４２の左右方向の寸法Ｔ２と同じである。また、兼用磁石１４３のその他の寸法も第１磁石４１および第２磁石４２と同じである。兼用磁石１４３は、磁力についても第１磁石４１および第２磁石４２と同じとなるように着磁されている。兼用磁石１４３のその他の構成は、第１実施形態の兼用磁石４３の構成と同様である。レンズ駆動装置１１０のその他の構成は、第１実施形態のレンズ駆動装置１０の構成と同様である。 In the lens driving device 110, 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.
　本実施形態によれば、カバー１２０が非磁性体製であるため、カバー１２０がヨークとして機能しない。そのため、第１磁石４１によって生じる磁気回路の磁束密度がカバー１２０によって大きくなることがない。これにより、第１磁石４１の寸法Ｔ１と兼用磁石１４３の寸法Ｔ４とを同じとすることで、第１コイル３３の左右方向両側に生じるローレンツ力のバランスを容易に取ることができる。具体的には、第１磁石４１と第１コイル３３との左右方向の距離と、兼用磁石４３と第１コイル３３との左右方向の距離と、を同じとすれば、第１コイル３３の左右方向の両側に生じるローレンツ力を同じにできる。これは、第２コイル３４についても同様である。 According to this embodiment, 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.
　また、第１磁石４１の寸法Ｔ１と第２磁石４２の寸法Ｔ２と兼用磁石１４３の寸法Ｔ４とが同じであるため、各磁石として同じ種類の磁石を用いることができる。これにより、レンズ駆動装置１１０の部品の種類数を少なくすることができ、レンズ駆動装置１１０の製造コストを低減できる。また、第１磁石４１と第２磁石４２と兼用磁石４３とを取り違えて組み立てることが防止されるため、レンズ駆動装置１１０の組み立て効率を向上でき、生産性を向上できる。また、各磁石の管理を容易にできる。 Moreover, since 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.
　なお、上記説明した各構成は、相互に矛盾しない範囲内において、適宜組み合わせることができる。 Note that the above-described configurations can be combined as appropriate within a range that does not contradict each other.
　１０，１１０…レンズ駆動装置、１０ａ…本体部、２０，１２０…カバー、３０Ａ…第１駆動部、３０Ｂ…第２駆動部、３１…第１レンズ保持部材、３２…第２レンズ保持部材、３３…第１コイル、３４…第２コイル、４１…第１磁石、４２…第２磁石、４３，１４３…兼用磁石、Ｊ１…第１中心軸、Ｊ２…第２中心軸
  DESCRIPTION OF SYMBOLS 10,110 ... Lens drive device, 10a ... Main-body part, 20, 120 ... Cover, 30A ... 1st drive part, 30B ... 2nd drive part, 31 ... 1st lens holding member, 32 ... 2nd lens holding member, 33 ... 1st coil, 34 ... 2nd coil, 41 ... 1st magnet, 42 ... 2nd magnet, 43, 143 ... Dual-use magnet, J1 ... 1st central axis, J2 ... 2nd central axis

Claims (6)

  1. 　レンズ体を保持可能な第１レンズ保持部材と、
    　レンズ体を保持可能で、前記第１レンズ保持部材と所定方向に並んで配置された第２レンズ保持部材と、
    　前記第１レンズ保持部材と前記第２レンズ保持部材とをそれぞれ移動可能に保持する本体部と、
    　前記第１レンズ保持部材を駆動する第１駆動部と、
    　前記第２レンズ保持部材を駆動する第２駆動部と、
    　を備え、
    　前記第１駆動部は、前記第１レンズ保持部材に設けられた第１コイルと、前記第１コイルと対向する磁石と、を有し、
    　前記第２駆動部は、前記第２レンズ保持部材に設けられた第２コイルと、前記第２コイルと対向する磁石と、を有し、
    　前記第１コイルと前記第２コイルとの間には、兼用磁石が配置され、
    　前記兼用磁石は、前記第１コイル側の磁極と前記第２コイル側の磁極とが互いに異なり、かつ、前記第１駆動部の前記磁石と前記第２駆動部の前記磁石とを兼ねる、レンズ駆動装置。     A first lens holding member capable of holding a lens body;
    A second lens holding member capable of holding a lens body and arranged in a predetermined direction with the first lens holding member;
    A main body for movably holding the first lens holding member and the second lens holding member;
    A first drive unit for driving the first lens holding member;
    A second drive unit for driving the second lens holding member;
    With
    The first driving unit includes a first coil provided on the first lens holding member, and a magnet facing the first coil.
    The second driving unit includes a second coil provided on the second lens holding member, and a magnet facing the second coil.
    A dual-purpose magnet is disposed between the first coil and the second coil,
    The dual-purpose magnet has a lens drive in which the magnetic pole on the first coil side and the magnetic pole on the second coil side are different from each other, and also serve as the magnet of the first driving unit and the magnet of the second driving unit. apparatus.
  2. 　前記第１駆動部は、前記所定方向において、前記第１コイルを挟んで前記兼用磁石と反対側に配置された第１磁石を有し、
    　前記第２駆動部は、前記所定方向において、前記第２コイルを挟んで前記兼用磁石と反対側に配置された第２磁石を有し、
    　前記第１磁石の前記第１コイル側の磁極と前記兼用磁石の前記第１コイル側の磁極とは、互いに同じであり、
    　前記第２磁石の前記第２コイル側の磁極と前記兼用磁石の前記第２コイル側の磁極とは、互いに同じである、請求項１に記載のレンズ駆動装置。     The first drive 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 drive unit includes a second magnet disposed on the opposite side of the dual-purpose magnet with the second coil interposed therebetween in the predetermined direction.
    The magnetic pole on the first coil side of the first magnet and the magnetic pole on the first coil side of the combined magnet are the same as each other,
    The lens driving device according to claim 1, wherein a magnetic pole on the second coil side of the second magnet and a magnetic pole on the second coil side of the dual-purpose magnet are the same.
  3. 　前記本体部は、前記第１レンズ保持部材、前記第２レンズ保持部材、前記第１駆動部および前記第２駆動部を収容する磁性体製のカバーを有し、
    　前記第１磁石および前記第２磁石は、前記カバーの内側面に固定され、
    　前記兼用磁石の前記所定方向の寸法は、前記第１磁石の前記所定方向の寸法および前記第２磁石の前記所定方向の寸法よりも大きい、請求項２に記載のレンズ駆動装置。     The main body includes a magnetic cover that houses the first lens holding member, the second lens holding member, the first driving unit, and the second driving unit,
    The first magnet and the second magnet are fixed to an inner surface of the cover,
    3. The lens driving device according to claim 2, wherein a size of the dual-purpose magnet in the predetermined direction is larger than a size of the first magnet in the predetermined direction and a size of the second magnet in the predetermined direction.
  4. 　前記本体部は、前記第１レンズ保持部材、前記第２レンズ保持部材、前記第１駆動部および前記第２駆動部を収容する非磁性体製のカバーを有し、
    　前記兼用磁石の前記所定方向の寸法は、前記第１磁石の前記所定方向の寸法および前記第２磁石の前記所定方向の寸法と同じである、請求項２に記載のレンズ駆動装置。     The main body has a non-magnetic cover that houses the first lens holding member, the second lens holding member, the first driving unit, and the second driving unit,
    3. The lens driving device according to claim 2, wherein the size of the dual-purpose magnet in the predetermined direction is the same as the size of the first magnet in the predetermined direction and the size of the second magnet in the predetermined direction.
  5. 　前記第１コイルは、前記第１レンズ保持部材に対して、前記所定方向と直交する第１中心軸周りに巻かれており、
    　前記第２コイルは、前記第２レンズ保持部材に対して、前記所定方向と直交し前記第１中心軸と平行な第２中心軸周りに巻かれており、
    　前記第１コイルの巻かれる向きと前記第２コイルの巻かれる向きとは、互いに同じである、請求項１から４のいずれか一項に記載のレンズ駆動装置。     The first coil is wound around a first central axis perpendicular to the predetermined direction with respect to the first lens holding member,
    The second coil is wound around a second central axis perpendicular to the predetermined direction and parallel to the first central axis with respect to the second lens holding member,
    The lens driving device according to claim 1, wherein a direction in which the first coil is wound and a direction in which the second coil is wound are the same.
  6. 　前記兼用磁石は、前記第１コイルと対向する第１面と前記第２コイルと対向する第２面とを有し、かつ、前記所定方向と直交する方向に延び、
    　前記第１面の磁極と前記第２面の磁極とは、互いに異なる、請求項１から５のいずれか一項に記載のレンズ駆動装置。     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,
    6. The lens driving device according to claim 1, wherein the magnetic pole of the first surface and the magnetic pole of the second surface are different from each other.
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