WO2018198796A1 - Dispositif d'entraînement de lentille, module de caméra utilisant un dispositif d'entraînement de lentille, et procédé de fabrication de dispositif d'entraînement de lentille - Google Patents

Dispositif d'entraînement de lentille, module de caméra utilisant un dispositif d'entraînement de lentille, et procédé de fabrication de dispositif d'entraînement de lentille Download PDF

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Publication number
WO2018198796A1
WO2018198796A1 PCT/JP2018/015375 JP2018015375W WO2018198796A1 WO 2018198796 A1 WO2018198796 A1 WO 2018198796A1 JP 2018015375 W JP2018015375 W JP 2018015375W WO 2018198796 A1 WO2018198796 A1 WO 2018198796A1
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WO
WIPO (PCT)
Prior art keywords
lens
side support
driving device
conductive plate
fixed
Prior art date
Application number
PCT/JP2018/015375
Other languages
English (en)
Japanese (ja)
Inventor
寛志 長田
田中　俊行
康 稲垣
彰良 猿舘
研 大河内
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 WO2018198796A1 publication Critical patent/WO2018198796A1/fr

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    • 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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system

Definitions

  • a lens holding member on which a coil is mounted is supported on a support base by a pair of lower leaf springs, and the coil is energized via a connection terminal fixed to the support base and the lower leaf spring.
  • the present invention relates to a lens driving device having a structure, a camera module using the lens driving device, and a method of manufacturing the lens driving device.
  • Patent Document 1 describes an invention related to a lens driving device.
  • a lens support having a coil is supported on a base by rear springs that are a pair of leaf springs.
  • a pair of terminals are supported on the base, and the pair of terminals are electrically connected to the pair of rear springs on a one-to-one basis.
  • the drive current is passed from the terminal to the coil via each rear spring.
  • the lens support is moved in the direction of the optical axis of the lens by the drive current flowing in the coil and the magnetic field from the magnet facing the coil, and this operation focuses the image on the image sensor.
  • the lens driving device described in Patent Document 1 has a terminal insertion hole formed in the base, and fixes a pair of rear springs to the base.
  • the terminal connection portion formed on the rear spring is opposed to the terminal insertion hole. Insert the terminal from the rear into the terminal insertion hole of the base, bring one end of the terminal into contact with the terminal connection part of the rear spring, and bond the one end of the terminal and the terminal connection part with a conductive thermosetting adhesive I am letting.
  • the present invention solves the above-described conventional problems, and it is easy to ensure the flatness of a pair of leaf springs, and the lens drive capable of maintaining the accuracy of the perpendicularity of the optical axis (center axis) of the lens holding member. It is an object to provide a device, a camera module using the lens driving device, and a method of manufacturing the lens driving device.
  • the present invention provides a support base, a lens holding member on which a lens body can be mounted, and a lens holding member that is provided between the support base and the lens holding member and moves in the optical axis direction of the lens body.
  • a pair of leaf springs that are freely supported, a coil mounted on the lens holding member, and a magnet facing the coil, Each of the leaf springs connects a fixed side support portion supported by the support base, a movable side support portion fixed to the lens holding member, and the fixed side support portion and the movable side support portion.
  • the fixed side support portion is installed on a spring fixing surface formed on the support base, and a conductive plate having a connection terminal is installed on the fixed side support portion, and the pair of plate springs from the conductive plate
  • the coil can be energized through the above.
  • the fixed support portion and the conductive plate are welded to each other in a state of being overlapped.
  • the conductive plate has the connection terminal formed by being partially bent, and the connection terminal is inserted into a through hole formed in the support base, and the connection The tip of the terminal can be configured to be exposed to the outside from the support base. In this case, it is preferable that an adhesive is filled in the through hole.
  • a positioning protrusion is provided on the spring fixing surface of the support base, and the positioning protrusion is formed in an attachment hole formed in the fixing side support portion and a hole portion formed in the conductive plate. Is preferably inserted.
  • a caulking deformation portion is formed on the positioning protrusion, and the fixing-side support portion and the conductive plate are caulked and fixed on the spring fixing surface. .
  • an adhesive is provided between the positioning protrusion and the attachment hole and the hole.
  • a camera module includes the lens driving device according to any one of the above, a lens body held by the lens holding member of the lens driving device, and an imaging element facing the lens body. It is what.
  • the present invention provides a support base, a lens holding member on which a lens body can be mounted, and the lens holding member provided between the support base and the lens holding member, the optical axis of the lens body.
  • a pair of leaf springs that are movably supported in a direction, a coil mounted on the lens holding member, and a magnet facing the coil, Each of the leaf springs connects a fixed side support portion supported by the support base, a movable side support portion fixed to the lens holding member, and the fixed side support portion and the movable side support portion.
  • the manufacturing method of the lens drive device which has an elastic arm part and the coil and the movable side support part are conducted, (A) using a conductive plate having a connection terminal, and stacking the fixed side support portion of the leaf spring and the conductive plate; (B) Overlaid in the step (a) on the spring fixing surface formed on the support base so that the fixed-side support portion is disposed between the support base and the conductive plate. Arranging and fixing the fixed-side support part and the conductive plate; It is what has.
  • the manufacturing method of the lens driving device of the present invention includes a joining step for joining the fixed side support portion and the conductive plate, which are overlapped in the step (a).
  • the conductive plate is formed of a metal material having a plate thickness larger than that of the plate spring, and welding is performed from the fixed support portion side in the joining step. In addition, it is preferable to join the fixed side support portion and the conductive plate.
  • the method for manufacturing a lens driving device of the present invention includes a leaf spring blank in which a connecting branch and a supporting plate are continuous from a part of the outer shape of the leaf spring, and a connecting branch and a support from a part of the outer shape of the conductive plate.
  • a conductive plate blank with a continuous plate part After joining the said fixed side support part and the said electrically conductive plate, it implements as what has the process of cut
  • the conductive plate has the connection terminal formed by being partially bent, When the fixed side support portion and the conductive plate are arranged on the spring fixing surface of the support base, the connection terminal is inserted into a through hole formed in the support base, and the connection terminal It is possible to expose the tip from the support base to the outside. In this case, it is preferable to fill the inside of the through hole with an adhesive.
  • a positioning protrusion is provided on the spring fixing surface of the support base, and the mounting hole formed in the fixing side support portion and the hole portion formed in the conductive plate It is preferable to insert the positioning protrusion.
  • a caulking deformation portion is formed on the positioning protrusion, and the fixing-side support portion and the conductive plate are caulked and fixed on the spring fixing surface. Furthermore, it is preferable to provide an adhesive between the positioning protrusion and the mounting hole and the hole.
  • the fixed side support portion of the leaf spring is fixed on the spring fixing surface of the support base, and the conductive plate having the connection terminal is overlaid on the fixed side support portion. Since the fixed side support portion is supported by the spring fixing surface formed on the support base, the flatness of the leaf spring can be maintained high based on the molding accuracy of the spring fixing surface. As a result, the inclination of the optical axis (center axis) of the lens holding member supported by the leaf spring can be suppressed, and the perpendicularity of the optical axis of the lens holding member to the plane along the spring fixing surface can be maintained with high accuracy. Can do.
  • the structure is such that the stationary support portion of the leaf spring and the conductive plate having the connection terminal are stacked on the support base, the conductive plate is insert-molded on the support base.
  • the support base can be made thinner than the conventional one, which can contribute to the thinning of the entire apparatus.
  • the assembly process is facilitated.
  • FIG. 2 is an exploded perspective view showing components of the lens driving device shown in FIG.
  • FIG. 1 is an exploded perspective view showing the lens driving device shown in FIG. 1 in a state where an upper leaf spring and a support member are removed;
  • FIG. 5 is an enlarged exploded perspective view showing a part of FIG.
  • a bottom view of the fixing structure of the lens holding member and the lower leaf spring as viewed from the Z2 side, 1 is a perspective view showing a method for manufacturing a lens driving device according to the present invention, in which a movable side support portion of a lower leaf spring is fixed to a lens holding member, and a fixed side support portion of the lower leaf spring and a conductive plate are overlapped.
  • Figure, The manufacturing method of the lens drive device of the present invention is shown.
  • the movable side support part of the lower leaf spring is fixed to the lens holding member, and the fixed side support part of the lower leaf spring and the conductive plate are overlapped and welded.
  • the manufacturing method of the lens drive device of the present invention which is an exploded perspective view showing a process of attaching a lens holding member with a lower leaf spring and a conductive plate fixed to a support base
  • the perspective view which shows the manufacturing method of the lens drive device of this invention, and shows what the lower leaf
  • the manufacturing method of the lens drive device of this invention is shown, and after the fixed side support part and conductive plate of a lower leaf
  • FIG. 1 and 2 show the overall structure of a lens driving device 1 according to an embodiment of the present invention.
  • FIG. 3 shows a support base, a lower leaf spring, a lens holding member, a coil, a magnet, and a case. It is shown. 4 and 5 show a conductive plate having a support base, a lower leaf spring, and connection terminals.
  • FIG. 5 is an exploded perspective view showing a part of FIG. 4 in an enlarged manner.
  • the lens driving device 1 has a lens holding member 10.
  • the lens holding member 10 is formed by injection molding with a synthetic resin material. As shown in FIG. 3, the lens holding member 10 has a cylindrical portion 13.
  • the cylindrical portion 13 is a relatively thin cylindrical body and has a central hole 13a continuous in the Z1-Z2 direction.
  • a lens body (lens barrel or lens barrel) is attached to the center hole 13a of the cylindrical portion 13.
  • the lens body includes a lens set obtained by combining one lens or a plurality of lenses, and a lens holder that holds the lens or the lens set.
  • an internal thread portion is formed in the center hole 13a
  • an external thread portion is formed on the outer peripheral surface of the lens holder, and the external thread portion is screwed to the internal thread portion, so that the lens body is mounted inside the cylindrical portion 13. Mounted.
  • the lens body is inserted into the center hole 13a, and the lens body and the inner surface of the cylindrical portion 13 are fixed with an adhesive.
  • the Z1-Z2 direction shown in each figure is the vertical direction, which is a direction (optical axis direction) parallel to the optical axis O of the lens body.
  • the lens driving device 1 is mounted on a portable electronic device such as a mobile phone.
  • An imaging element such as a CCD is disposed on the Z2 side of the lens driving device 1.
  • the lens driving device 1, the lens body, and the image sensor are combined to form a camera module. In the camera module, the lens holding member 10 and the lens body mounted on the lens holding member 10 are moved in the Z1-Z2 direction, whereby automatic focusing of an image formed on the image sensor is performed.
  • the lens driving device 1 is provided with a support base 40 and a case 3.
  • the support base 40 and the case 3 are combined to form a housing having a storage space inside.
  • the lens holding member 10 and the lower leaf springs 20A and 20B are accommodated in this accommodation space.
  • each of the lower leaf springs 20A and 20B is a leaf spring in which a fixed side support portion 21, a movable side support portion 22, and an elastic arm portion 23 that connects the fixed side support portion 21 and the movable side support portion 22 are conductive. It is integrally formed of a metal material.
  • the lower leaf springs 20A and 20B are formed of a springy stainless steel plate or phosphor bronze plate.
  • the fixed side support portion 21 of the lower leaf spring 20A located on the Y1 side is formed separately into an attachment portion 21a located on the X2 side and an attachment portion 21b located on the X1 side.
  • the fixed side support portion 21 of the lower leaf spring 20B located on the Y2 side is also formed by being divided into an attachment portion 21a located on the X2 side and an attachment portion 21b located on the X1 side.
  • the lower leaf springs 20A and 20B each have a mounting hole 24a formed in the mounting portion 21a located on the X2 side, and a mounting hole 24b formed in the mounting portion 21b located on the X1 side.
  • the mounting holes 24a and 24b are preferably holes with the entire periphery of the edge closed, but may be notched holes with a part opened.
  • the conductive plate 50 ⁇ / b> A is superimposed on the upper side (Z ⁇ b> 1 side) of the X ⁇ b> 2 side mounting portion 21 a of the lower leaf spring 20 ⁇ / b> A located on the Y ⁇ b> 1 side, and the lower part located on the Y ⁇ b> 2 side.
  • the conductive plate 50B is overlaid on the upper side (Z1 side) of the attachment portion 21a on the X2 side of the leaf spring 20B.
  • the conductive plates 50A and 50B are formed of a conductive metal plate, and are formed of, for example, a rolled steel plate whose surface is gold-plated, brass or another copper alloy plate.
  • the conductive plates 50A and 50B have a support plate portion 51 parallel to the XY plane, and a connection terminal 52 bent downward from an edge portion of the support plate portion 51.
  • a hole 53 is formed in the support plate 51.
  • the hole 53 is preferably a hole whose entire circumference is closed, but may be a notch-shaped hole partially opened.
  • the mounting portion 21a of the lower leaf spring 20A on the Y1 side and the support plate portion 51 of the conductive plate 50A are positioned relative to each other by making the mounting hole 24a and the hole portion 53 coincide with each other.
  • the attachment portion 21a of the lower plate spring 20B on the Y2 side and the support plate portion 51 of the conductive plate 50B are also relatively positioned by making the attachment hole 24a and the hole portion 53 coincide with each other.
  • the mounting portion 21a of the lower leaf spring 20A and the support plate portion 51 of the conductive plate 50A are joined by welding. This welding is performed by laser spot welding.
  • the conductive plate 50A is formed of a metal plate that is thicker than the lower plate spring 20A. Therefore, in a state where the attachment portion 21a and the support plate portion 51 are overlapped with each other, the attachment portion 21a is attached to the support plate portion 51 by performing welding that irradiates a laser from the lower leaf spring 20A toward the Z1 direction from the Z2 side. Can be efficiently welded. As shown in FIG. 5, the welding spot WS is formed at the central portion of the overlapping portion between the attachment portion 21 a and the support plate portion 51.
  • the attachment portion 21a of the lower leaf spring 20B on the Y2 side and the support plate portion 51 of the conductive plate 50B are also joined by welding in the same manner.
  • a small hole 25 is formed in the central portion of the attachment portion 21a of the lower leaf spring 20B on the Y2 side.
  • the attachment portion 21a and the support plate portion 51 are overlapped, and laser is irradiated to the edge portion of the small hole 25 from the Z2 side to the Z1 direction with respect to the lower leaf spring 20B to perform welding.
  • the welding state at this time can be confirmed by observing the edge of the small hole 25.
  • the small holes 25 are not necessarily provided, and may be the lower leaf springs 20B that are not provided with the small holes, such as the attachment portion 21a of the lower leaf springs 20A. Conversely, a small hole may be similarly formed in the lower leaf spring 20A on the Y1 side.
  • the support base 40 has a square shape (rectangular shape) when viewed from the optical axis direction, and is formed of a synthetic resin material that is a nonmagnetic material.
  • spring fixing surfaces 41A and 41B are formed on the four corners of the support base 40.
  • Two spring fixing surfaces located on the X2 side are denoted by reference numeral 41A
  • two spring fixing surfaces located on the X1 side are denoted by reference numeral 41B.
  • the spring fixing surfaces 41A and 41B are formed at a position one step higher in the Z1 direction on the upper surface 40a of the support base 40 facing the Z1 direction.
  • the surfaces of all the spring fixing surfaces 41A and 41B located at the four locations are located on the same plane parallel to the XY plane. Since the support base 40 is injection-molded with a synthetic resin material, the four spring fixing surfaces 41A and 41B can be positioned substantially on the same plane by increasing the accuracy of the mold.
  • the positioning protrusions 42a are integrally formed on the two spring fixing surfaces 41A located on the X2 side, and the positioning protrusions 42b are integrally formed on the two spring fixing surfaces 41B located on the X1 side.
  • the positioning protrusions 42a and 42b protrude in the Z1 direction. As shown in FIGS. 4 and 5, the positioning protrusions 42a and the positioning protrusions 42b are cylindrical bodies each having a certain radius.
  • the support base 40 is formed with a rectangular through hole 43 at a position adjacent to the spring fixing surface 41A formed on the X2 side.
  • the through hole 43 is formed between the side 40c facing the X2 side of the support base 40 and each spring fixing surface 41A.
  • the through hole 43 is formed through the support base 40 in the vertical direction (Z1-Z2 direction).
  • the positioning projection 42a of the support base 40 is inserted through the hole 53 formed in 51, and the attachment portion 21a and the support plate portion 51 are placed on the spring fixing surface 41A. Further, the positioning protrusion 42b is inserted into the mounting hole 24b formed in the mounting portion 21b on the X1 side of the lower leaf springs 20A and 20B, and the mounting portion 21b is installed on the spring fixing surface 41B.
  • the tip portions of the positioning projections 42a and 42b are heated and pressed to form a crimp deformation portion 44a at the tip portion of the positioning projection 42a, and the crimp deformation portion at the tip portion of the positioning projection 42b. 44b is formed.
  • the mounting portion 21a of the lower leaf springs 20A and 20B and the support plate portion 51 of the conductive plates 50A and 50B are fixed by caulking on the spring fixing surface 41A on the X2 side of the support base 40.
  • Mounting portions 21a and 21b to be the fixed side support portions 21 are installed on the spring fixing surfaces 41A and 41B of the support base 40 in direct contact with each other, and conductive plates 50A and 50B having support terminals 52 (supports).
  • the plate portion 51) is overlaid on the upper side (Z1 side) of the attachment portion 21a of the lower leaf springs 20A and 20B.
  • the four spring fixing surfaces 41A and 41B can be formed on substantially the same plane by increasing the accuracy of the mold. Since the attachment portions 21a and 21b of the lower leaf springs 20A and 20B are directly received only by the surfaces of the spring fixing surfaces 41A and 41B, the flatness of the fixed side support portion 21 of the lower leaf springs 20A and 20B is kept high. Then, it can be attached to the support base 40. Moreover, the relative flatness of the fixed side support portions 21 of the lower leaf spring 20A and the lower leaf spring 20B that are separated from each other can be maintained high.
  • the four attachment portions 21a and 21b constituting the fixed side support portion 21 of the lower leaf springs 20A and 20B are not connected to each other, and are independent from each other. Therefore, on the support base 40, the spring fixing surfaces 41A and 41B need only be provided at the square corners, and there is no need to arrange the spring fixing surfaces on the X1-X2 side and Y1-Y2 side sides. Therefore, the support base 40 can be reduced in size, and the attachment portions 21a and 21b can be supported with sufficient strength. Moreover, since the attachment parts 21a and 21b separated into four are installed on the spring fixing surfaces 41A and 41B formed on substantially the same plane, the two lower leaf springs 20A and 20B maintain a high flatness. It becomes possible to fix with.
  • the conductive plates 50A and 50B are stacked on the fixed-side support portion 21 of the lower leaf springs 20A and 20B, compared to the structure in which the connection terminals are embedded in the support base by insert molding, The thickness dimension of the support base 40 in the Z1-Z2 direction can be reduced, and as a result, the lens driving device 1 can be easily thinned.
  • connection terminals 52 integral with the conductive plates 50A and 50B are inserted into the through holes 43 formed in the support base 40, The Z2 side tip of the connection terminal 52 is exposed further below the lower surface 40 b of the support base 40.
  • the conductive plates 50A and 50B can be firmly fixed to the support base 40, and the through hole 43 is closed with an adhesive and supported. It becomes easy to prevent liquid or the like from entering the inside of the case 3 from the lower side of the base 40 through the through hole 43.
  • an adhesive may be attached around the positioning protrusions 42a and 42b without forming the caulking deformation portions 44a and 44b on the positioning protrusions 42a and 42b.
  • an adhesive layer between the positioning projection 42a on the X2 side and the attachment hole 24a and the hole 53, the attachment part 21a of the lower leaf springs 20A and 20B and the support plate part 51 of the conductive plates 50A and 50B are supported. It can be bonded and fixed to the base 40. Further, the attachment portion 21b of the lower leaf springs 20A and 20B and the support base 40 can be bonded and fixed with an adhesive adhered to the positioning projection 42b on the X1 side. Moreover, you may use together this adhesion fixing and the caulking fixation by caulking deformation part 44a, 44b.
  • a pair of mounting holes 22a are formed in the movable side support portion 22 of each of the lower leaf springs 20A and 20B on the X1 side and the X2 side, respectively.
  • spring fixing surfaces 10b are provided on the X1 side and the X2 side.
  • a pair of protrusions 10c protruding in the Z2 direction are integrally formed on the Y1 side
  • a pair of protrusions 10d protruding in the Z2 direction are integrally formed on the Y2 side.
  • the mounting hole 22a formed in the movable side support portion 22 of the lower leaf spring 20A on the Y1 side is fitted into the protrusion 10c, and the protrusion 10c is heat caulked so that the movable side support portion 22 of the lower leaf spring 20A is
  • the lens holding member 10 is fixed to the spring fixing surface 10b on the lower surface.
  • the movable side support portion 22 of the lower leaf spring 20B is fixed to the spring fixing surface 10b. Is done.
  • the lower leaf springs 20A and 20B are fixed to spring fixing surfaces 41A and 41B formed so as to be substantially flush with the support base 40, and the flatness is maintained high, the lower leaf springs 20A and 20B are movable.
  • the lens holding member 10 supported by the side support portion 22 can suppress the inclination of the optical axis O (the optical axis of the lens body) coinciding with the central axis of the cylindrical portion 13, and the spring fixing surface 41 ⁇ / b> A of the optical axis O.
  • the perpendicularity with respect to the plane (XY plane) along 41B can be set with high accuracy.
  • a flange portion 11 is formed on the Z2 side and a plurality of regulating protrusions 12 are formed on the Z1 side on the outer side (outer peripheral portion) of the cylindrical portion 13 of the lens holding member 10.
  • the flange portion 11 may have a bowl shape extending substantially continuously in the circumferential direction around the optical axis O, or may be formed intermittently in the circumferential direction.
  • the restricting protrusions 12 are formed at intervals in the circumferential direction.
  • the flange portion 11 and the plurality of regulating protrusions 12 face each other in the optical axis direction (Z1-Z2 direction).
  • projections 19a and 19b are integrally formed at two locations on the bottom surface of the lens holding member 10 facing the Z2 direction.
  • the protrusions 19a and 19b protrude in the Z2 direction.
  • the protrusion 19a located on the Y1 side is a winding protrusion for fixing the winding start end 61a of the conducting wire forming the coil 60
  • the protrusion 19b located on the Y2 side is a winding protrusion for fixing the winding end 61b of the conducting wire.
  • the conducting wire for forming the coil 60 is a coated conducting wire, and has a copper wire that is a conductive metal wire and an insulating coating layer that covers the copper wire.
  • the covering layer has a two-layer structure of an insulating layer such as a polyurethane resin covering the copper wire and a fusion layer such as a polyamide resin on the surface thereof.
  • the covering layer is removed at the winding start end 61a of the conducting wire, and the winding start end 61a is wound around the protrusion 19a on the Y1 side shown in FIG.
  • the conducting wire extending from the protrusion 19 a is wound between the flange portion 11 and the restriction protrusion 12 on the outer side portion of the cylindrical portion 13 of the lens holding member 10.
  • the conductive wire is heated by applying hot air or the like, and the insulating layers are fusion-bonded together by melting the fusion layer to form the coil 60.
  • the winding end 61b of the conducting wire that has finished winding the coil 60 is drawn out to the lower surface of the lens holding member 10, the coating layer is removed, and the winding end 61b is wound around the Y2 projection 19b shown in FIG.
  • the conductive plate 50A is overlapped and joined to the attachment portion 21a of the lower leaf spring 20A on the Y1 side, and the conductive plate 50B is overlapped and joined to the attachment portion 21a of the lower leaf spring 20B on the Y2 side. Therefore, the connection terminal 52 of the conductive plate 50A is electrically connected to the winding start end 61a of the coil 60 via the lower plate spring 20A on the Y1 side, and the connection terminal 52 of the conductive plate 50B is connected to the lower plate spring 20B on the Y2 side. Is conducted to the winding end 61b of the coil 60.
  • the case 3 shown in FIGS. 1, 2 and 3 is formed of a magnetic steel plate (steel plate made of ordinary steel) or the like and functions as a magnetic yoke. Case 3 has a ceiling portion 3a.
  • the support base 40 has a light transmission hole 45 at the center, but the opening 3 b also opens at the ceiling 3 a of the case 3.
  • the light transmission hole 45 of the support base 40 and the opening 3b of the case 3 face each other in the Z1-Z2 direction, and also face the center hole 13a of the lens holding member 10 from above and below.
  • the case 3 has a quadrangular (rectangular) planar shape, and is provided with four planar side plate portions 3d and an angular side plate portion 3e that connects the planar side plate portions 3d as outer walls.
  • the planar shape of the opening 3b formed in the ceiling portion 3a is a quadrangular shape, and the opposing yoke portion 3c bent in the Z2 direction is integrally formed from the four corners of the inner edge of the opening 3b. ing.
  • the opposing yoke portion 3c faces the inner surface of each square side plate portion 3e from the inside of the case.
  • the ceiling 3a of the case 3 has a rectangular shape when viewed from above, which is the optical axis direction, and through portions 4 are formed at four corners thereof.
  • the through portion 4 faces the magnet M fixed inside the case 3 in the Z1 direction.
  • the upper leaf spring 30 is installed above the ceiling 3 a of the case 3 (in the Z1 direction).
  • the upper leaf spring 30 has a substantially rectangular frame-shaped fixed side support portion 31, a movable side support portion 32 inside thereof, and an elastic arm portion that connects the fixed side support portion 31 and the movable side support portion 32 at four locations.
  • 33 is integrally formed of a leaf spring metal material. Through portions 34 are formed at four corners of the fixed side support portion 31.
  • a support member (spring fixing member) 6 is provided above the ceiling 3a of the case 3 and further above the upper leaf spring 30 (in the Z1 direction).
  • the support member 6 is formed in a rectangular shape by a nonmagnetic material such as a synthetic resin material.
  • the protrusions 7 are integrally formed from the four corners in the Z2 direction.
  • a light transmission hole 6 b is opened at the center of the support member 6. The light transmission hole 6 b faces the opening 3 b formed in the ceiling 3 a of the case 3.
  • the fixed side support portion 31 of the upper leaf spring 30 is installed on the outer surface facing the Z1 side of the ceiling portion 3a of the case 3, and the support member 6 is overlaid thereon,
  • the protrusions 7 provided at the four locations of the support member 6 are inserted into the through portions 34 formed at the four locations of the fixed-side support portion 31 of the upper leaf spring 30, and 4 of the ceiling portion 3 a of the case 3. It is inserted through the penetrating part 4 formed at the place.
  • the tip part which faces the Z2 side of the protrusion 7 on the inner side of the ceiling part 3a of the case 3 is thermally deformed, and the support member 6 and the ceiling part 3a of the case 3 However, heat caulking is fixed.
  • the lens driving device 1 is provided with four magnets M.
  • the four magnets M are formed independently.
  • each of the magnets M is an outer surface Ma serving as an outer magnetized surface directed outward in the radial direction around the optical axis O, and an inner magnetized surface facing the optical axis O. It has a magnetized surface Mg.
  • Each magnet M is magnetized such that the magnetized surface Mg and the outer surface Ma have different polarities. Further, the magnetized surfaces Mg of all the magnets M are magnetized so as to have the same polarity.
  • Each magnet M has a flat upper surface Mb facing in the Z1 direction.
  • each magnet M is disposed inside the case 3 and inside the square side plate portion 3e.
  • each magnet M In a state in which a fluid adhesive is applied to the inner surfaces of the corner side plate portion 3e and the flat side plate portion 3d of the case 3, each magnet M is in a posture in which the magnetized surface Mg faces the optical axis O. Are magnetically attracted to the inner surface of the planar side plate portion 3d facing each other at an angle of 90 degrees.
  • each magnet M With the adhesive interposed between the inner surface of the case 3 and each magnet M, each magnet M has an upper surface Mb facing in the Z1 direction of the caulking deformed portion (thermally deformed portion) of the protrusion 7.
  • the magnet M is positioned in the Z1 direction (optical axis O direction) inside the case 3 by being abutted against the tip surface.
  • a spring fixing surface 10a is provided on the upper surface of the cylindrical portion 13 of the lens holding member 10 facing the Z1 direction.
  • the spring fixing surface 10a is abutted on the lower side of the movable side support portion 32 of the upper leaf spring 30, and the spring fixing surface 10a and the movable side support portion 32 are fixed with an adhesive.
  • the support base 40 and the case 3 are also fixed to each other with an adhesive.
  • the elastic arm portions 23 provided in the lower leaf springs 20A and 20B are formed in a thin curved shape, that is, a meandering shape, and are provided in the upper leaf spring 30 as shown in FIG.
  • the elastic arm portion 33 is also formed into a thin curved shape, that is, a meandering shape.
  • the lower end of the lens holding member 10 and the support base 40 are connected via lower leaf springs 20A and 20B, and the upper end of the cylindrical portion 13 of the lens holding member 10 and the ceiling portion 3a of the case 3 are the upper plate. It is connected via a spring 30.
  • the lens holding member 10 is inside the case 3 in the Z1-Z2 direction, which is the optical axis direction. It is supported to move freely.
  • the case 3, the support member 6, the magnet M, and the support base 40 constitute a fixed side member that does not move with respect to the movable side lens holding member 10.
  • the upper leaf spring 30 may be provided between the fixed side member including the case 3 (housing) and the lens holding member 10, and does not need to be disposed outside the case 3.
  • the fixed side support portion 31 of the upper leaf spring 30 may be fixed between the lower surface of the ceiling portion 3a of the case 3 and the upper surface Mb of the magnet M.
  • the lens holding member 10 is driven in the optical axis direction (Z1 direction) by an electromagnetic force generated by a drive current flowing through the coil 60 and a magnetic field generated from the magnet M. By the operation of the lens holding member 10, the image formed on the imaging element is focused by the lens body held by the lens holding member 10.
  • the lens holding member 10 is shown in a posture in which the lower surface on the Z2 side faces upward in the figure.
  • the coil 60 is wound around the outer side of the lens holding member 10, in FIGS. 7 and 8, the winding start end 61a of the conducting wire wound around the protrusion 19a and the winding end 61b wound around the protrusion 19b (both see FIG. 6). ) Is omitted.
  • the crimping deformation portions 44a and 44b are formed on the positioning protrusions 42a and 42b.
  • the leaf spring blank 120 and the conductive plate blank 150 are used.
  • the leaf spring blank 120 is punched from a spring metal plate. However, the leaf spring blank 120 may be obtained by etching a metal plate.
  • the leaf spring blank 120 has the outer shapes of the lower leaf spring 20A and the lower leaf spring 20B punched out.
  • the connecting branch portion 121a is continuous from the X2 side mounting portion 21a of the lower leaf spring 20A, and the connecting branch portion 121a is also continuous from the X2 side mounting portion 21a of the lower leaf spring 20B. 121a, the support plate portion 122a is continuous.
  • the connecting branch 121b is continuous from the X1 side mounting portion 21b of the lower leaf spring 20A, and the connecting branch 121b is also continuous from the X1 mounting portion 21b of the lower leaf spring 20B. 121b, the support plate portion 122b is continuous. Therefore, the lower leaf spring 20A and the lower leaf spring 20B are connected via the connecting branch portions 121a and 121b and the supporting plate portions 122a and 122b.
  • the support plate portion 122a and the support plate portion 122b are strip-shaped plate portions that are continuous in the Y1-Y2 direction.
  • the support plate portion 122a and the support plate portion 122b extend long in the Y1-Y2 direction, and a plurality of lower leaf springs 20A and 20B are spaced apart in the Y1-Y2 direction from the common support plate portion 122a and the support plate portion 122b.
  • a feed hole 123a is formed in the support plate portion 122a
  • a feed hole 123b is formed in the support plate portion 122b
  • the support plate portions 122a and 122b are sent in the Y direction using the feed holes 123a and 123b.
  • plate spring 20A, 20B is sent in order according to a some assembly process.
  • the conductive plate blank 150 is formed of a conductive metal plate, and the outer shapes of the two conductive plates 50A and 50B are punched out.
  • a connecting branch 151 is continuous from the conductive plates 50A and 50B, and a support plate 152 is continuous with each connecting branch 151.
  • the support plate portion 152 is a belt-like plate portion extending continuously in the Y1-Y2 direction, and a plurality of conductive plates 50A and 50B are connected to the common support plate portion 152 at intervals in the Y1-Y2 direction. .
  • a feed hole 153 is formed in the support plate portion 152.
  • the conductive plates 50A and 50B are provided with connection terminals 52 that are bent at the edge of the support plate portion 51 and project in the Z2 direction.
  • the mounting holes 22a formed on the X1 and X2 sides of the movable support 22 of the lower leaf spring 20A on the Y1 side are fitted to the protrusions 10c on the lower surface of the lens holding member 10 to Heat caulking 10c.
  • the mounting holes 22a formed on the X1 and X2 sides of the movable support 22 of the lower leaf spring 20B on the Y2 side are fitted into the protrusions 10d on the lower surface of the lens holding member 10 to heat the protrusions 10d. .
  • plate spring which fixes the movable side support part 22 of lower leaf
  • the movable side support portion fixing step may be performed before the fixing side support portion and conductive plate fixing step described later.
  • FIG. 8 shows a step before or after the step of fixing the movable side support portion 22 of the lower leaf springs 20A and 20B supported by the leaf spring blank 120 to the lens holding member 10 (movable side support portion fixing step).
  • a laminating process is performed in which the support plate portions 51 of the conductive plates 50A and 50B of the conductive plate blank 150 are stacked on the X2 side mounting portions 21a and 21a that are the fixed side support portions 21 of the lower plate springs 20A and 20B.
  • the support plate portions 51 of the conductive plates 50A and 50B are overlapped on the Z1 side (upper surface side) of the attachment portion 21a of the lower leaf springs 20A and 20B.
  • a common jig pin (not shown) is inserted into both the hole portion 53 formed in the support plate portion 51 and the attachment hole 24a formed in the attachment portion 21a.
  • the part 51 and the attachment part 21a are positioned.
  • a joining step is performed for joining the overlapped attachment portion 21a and the support plate portion 51 of the conductive plates 50A and 50B.
  • the mounting portion 21a having a small thickness is irradiated with a laser spot from the Z2 side in the Z1 direction, and the mounting portion 21a and the support plate portion 51 are welded.
  • joining of the attaching part 21a and the support plate part 51 is not limited to welding, It is also possible to perform with a conductive adhesive.
  • the leaf spring blank 120 and the conductive plate blank 150 fixed to the lower surface of the lens holding member 10 are directed downward in the figure, and the leaf spring blank 120 and the conductive plate blank 150 are attached to the support base.
  • the fixing process fixing process of a fixed side support part and a conductive plate for fixing to the base 40 is performed. In this fixing step, as described with reference to FIGS.
  • the attachment portion 21a of the fixed side support portion 21 is disposed between the upper surface of the support base 40 (spring fixing surface 41A) and the support plate portions 51 of the conductive plates 50A and 50B.
  • the X1 side mounting portion 21b of the lower leaf springs 20A and 20B is installed on the spring fixing surface 41B of the support base 40, the positioning projection 42b is inserted into the mounting hole 24b, and the tip of the positioning projection 42b is inserted.
  • the caulking deformation portion 44b is formed.
  • connection terminals 52 of the conductive plates 50 ⁇ / b> A and 50 ⁇ / b> B are inserted into the through holes 43 formed in the support base 40, and the front ends of the connection terminals 52 are projected from the lower surface of the support base 40.
  • the through hole 43 is filled with an adhesive from the Z1 side.
  • an adhesive is also applied to the positioning protrusions 42a, and the attachment portion 21a and the support plate portion 51 are bonded and fixed to the support base 40.
  • the positioning protrusion 42b and the attachment portion 21b are also fixed with an adhesive.
  • the fixed side support portion 21 of the lower plate springs 20A and 20B and the support plate portion 51 of the conductive plates 50A and 50B are arranged and fixed on the spring fixing surfaces 41A and 41B of the support base 40.
  • the attachment portion 21a and the support plate portion 51 are bonded and fixed to the support base 40 by applying an adhesive to the positioning projection 42a, the caulking deformation portion 44a is not formed at the front portion of the positioning projection 42a. May be.
  • the positioning projection 42b and the attachment portion 21b are fixed with an adhesive, the caulking deformation portion 44b may not be formed at the tip of the positioning projection 42b.
  • the leaf spring blank 120, the conductive plate blank 150, the lens holding member 10, and the coil 60 can be mounted on the support base 40 as shown in FIG.
  • the cutting process of a connection branch part is performed.
  • the overlapping portion of the connecting branch portion 121a of the leaf spring blank 120 extending to the X2 side and the connecting branch portion 151 of the conductive plate blank 150 is simultaneously cut along the cutting line L1 shown in FIG.
  • the connecting branch 121b of the leaf spring blank 120 extending to the X1 side is cut along the cutting line L2.
  • the assembly 70 shown in FIG. 11 is completed by completion
  • the connecting branch portions 121a and 121b and the connecting branch portion 151 are cut using a mechanical cutting tool, or cut using a laser cutter. It should be noted that the step of filling the through hole 43 with an adhesive and curing and the step of applying and curing the adhesive to the positioning protrusions 42a and 42b are not performed as part of the fixing step described above, You may carry out after a cutting process.
  • the assembly 70 in which the support base 40, the lower leaf springs 20 ⁇ / b> A and 20 ⁇ / b> B, the conductive plates 50 ⁇ / b> A and 50 ⁇ / b> B, the lens holding member 10, and the coil 60 are combined is already provided with the support member 6.
  • the upper leaf spring 30 and the magnet M are inserted into the case 3 fixed from below.
  • the upward spring fixing surface 10a of the lens holding member 10 is abutted to the lower side of the movable side support portion 32 of the upper leaf spring 30, and the spring fixing surface 10a and the movable side support portion 32 are fixed with an adhesive.
  • the support base 40 and the case 3 are also fixed to each other by an adhesive, and the lens driving device 1 is completed.
  • plate spring 20A, 20B and the coil 60 is performed after the movable side support part fixing process mentioned above.
  • this conductive connection step as described above with reference to FIG. 6, the movable side support portion 22 and the winding start end 61a of the lower leaf spring 20A are soldered, and the movable side support portion 22 and the winding end of the lower leaf spring 20B are soldered. 61b is soldered.
  • This conductive connection step may be performed anywhere after the movable side support portion fixing step and before the fixed side support portion and the conductive plate fixing step.
  • the winding start end 61 a and winding end 61 b of the conductive wire constituting the coil 60 are wound around the protrusions 19 a and 19 b on the lower surface of the lens holding member 10.
  • the portion and the lower leaf springs 20A and 20B are soldered to be conductive.
  • the present invention has a structure in which the winding start end 61a and winding end 61b of the conductive wire extending from the coil 60 are directly connected to the lower leaf springs 20A and 20B by soldering or a conductive adhesive. Good.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

Le problème décrit par la présente invention est de fournir : un dispositif d'entraînement de lentille au moyen duquel un ressort à lame peut être monté sur une base de support tout en conservant un degré élevé de planéité et la perpendicularité de l'axe optique d'un matériau de support de lentille supporté par le ressort à lame peut être maintenue ; un module de caméra utilisant le dispositif d'entraînement de lentille ; et un procédé de fabrication du dispositif d'entraînement de lentille. Selon la solution de l'invention, une partie de fixation (21a), qui est une partie de support côté fixation d'un ressort à lame inférieur (20A), est placée sur une surface de fixation de ressort (41A) formée sur une base de support (40), une plaque conductrice (50A) ayant une borne de connexion (52) est empilée sur la partie de fixation (21a), et la partie de fixation (21a) et la plaque conductrice (51A) sont calées autour d'une saillie de positionnement (42a) faisant saillie à partir de la surface de fixation de ressort (41A). Étant donné que la partie de support côté fixation du ressort à lame inférieur (20A) est reçue par la surface de fixation de ressort (41A), la planéité du ressort à lame inférieur (20A) peut être maintenue.
PCT/JP2018/015375 2017-04-25 2018-04-12 Dispositif d'entraînement de lentille, module de caméra utilisant un dispositif d'entraînement de lentille, et procédé de fabrication de dispositif d'entraînement de lentille WO2018198796A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017086019 2017-04-25
JP2017-086019 2017-04-25

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WO2018198796A1 true WO2018198796A1 (fr) 2018-11-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114063239A (zh) * 2021-10-28 2022-02-18 新思考电机有限公司 透镜驱动的簧片安装结构及方法、驱动、摄像装置
JP7504299B2 (ja) 2020-11-30 2024-06-21 維沃移動通信有限公司 電子機器及び電子機器の支持部材の取り付け方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080297650A1 (en) * 2007-05-10 2008-12-04 Hysonic Co., Ltd. Image photographing device
JP2010066286A (ja) * 2008-09-08 2010-03-25 Nidec Sankyo Corp レンズ駆動装置
JP2011102823A (ja) * 2009-11-10 2011-05-26 Nidec Sankyo Corp レンズ駆動装置
JP2011154120A (ja) * 2010-01-26 2011-08-11 Nidec Sankyo Corp レンズ駆動装置
JP2012242648A (ja) * 2011-05-20 2012-12-10 Alps Electric Co Ltd レンズ駆動装置
WO2014103457A1 (fr) * 2012-12-26 2014-07-03 シャープ株式会社 Appareil d'entraînement de lentille
JP2014174403A (ja) * 2013-03-11 2014-09-22 Tdk Taiwan Corp レンズ保持装置
JP2015175945A (ja) * 2014-03-14 2015-10-05 新シコー科技株式会社 レンズ駆動装置、カメラ装置及び電子機器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080297650A1 (en) * 2007-05-10 2008-12-04 Hysonic Co., Ltd. Image photographing device
JP2010066286A (ja) * 2008-09-08 2010-03-25 Nidec Sankyo Corp レンズ駆動装置
JP2011102823A (ja) * 2009-11-10 2011-05-26 Nidec Sankyo Corp レンズ駆動装置
JP2011154120A (ja) * 2010-01-26 2011-08-11 Nidec Sankyo Corp レンズ駆動装置
JP2012242648A (ja) * 2011-05-20 2012-12-10 Alps Electric Co Ltd レンズ駆動装置
WO2014103457A1 (fr) * 2012-12-26 2014-07-03 シャープ株式会社 Appareil d'entraînement de lentille
JP2014174403A (ja) * 2013-03-11 2014-09-22 Tdk Taiwan Corp レンズ保持装置
JP2015175945A (ja) * 2014-03-14 2015-10-05 新シコー科技株式会社 レンズ駆動装置、カメラ装置及び電子機器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7504299B2 (ja) 2020-11-30 2024-06-21 維沃移動通信有限公司 電子機器及び電子機器の支持部材の取り付け方法
CN114063239A (zh) * 2021-10-28 2022-02-18 新思考电机有限公司 透镜驱动的簧片安装结构及方法、驱动、摄像装置

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