+

WO2018173776A1 - Lens drive device, camera module using lens drive device, and method for producing lens drive device - Google Patents

Lens drive device, camera module using lens drive device, and method for producing lens drive device Download PDF

Info

Publication number
WO2018173776A1
WO2018173776A1 PCT/JP2018/009011 JP2018009011W WO2018173776A1 WO 2018173776 A1 WO2018173776 A1 WO 2018173776A1 JP 2018009011 W JP2018009011 W JP 2018009011W WO 2018173776 A1 WO2018173776 A1 WO 2018173776A1
Authority
WO
WIPO (PCT)
Prior art keywords
holding member
lens
lens holding
case
coil
Prior art date
Application number
PCT/JP2018/009011
Other languages
French (fr)
Japanese (ja)
Inventor
田中　俊行
康 稲垣
寛志 長田
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 WO2018173776A1 publication Critical patent/WO2018173776A1/en

Links

Images

Definitions

  • the present invention relates to a lens driving device including a lens holding member on which a lens body is mounted, a coil wound around the lens holding member, and a magnet facing the coil, a camera module using the lens driving device, and a lens
  • the present invention relates to a method for manufacturing a drive device.
  • Patent Document 1 describes an invention relating to a lens driving device. *
  • the lens driving device includes a lens holding member on which a lens body can be mounted and a support member.
  • the lens holding member is supported by the support member via the lower leaf spring and the upper leaf spring.
  • the lens holding member is integrally formed with a flange that protrudes laterally continuously over the entire area in the circumferential direction and a protrusion that is spaced apart in the circumferential direction and faces the collar in the optical axis direction.
  • a conducting wire is wound around the outer side of the lens holding member between the flange and the protrusion to form a winding portion of the coil.
  • a magnet is fixed on the support member side, and this magnet faces the winding portion of the coil.
  • a connection terminal portion is formed on a metal member embedded in the support member, and a drive current is applied from the connection terminal portion to the coil via the lower leaf spring, so that the lens holding member is in the optical axis direction of the lens body. Moved to. By this operation, the image is focused on the image sensor.
  • the lens holding member described in Patent Document 1 is injection-molded with a synthetic resin material.
  • the molten synthetic resin material is injected into the mold cavity, and after the synthetic resin material is solidified, the mold is separated and the molded lens holding member is taken out using the eject pin. It is. *
  • the lens holding member has a structure in which the tip of the cylindrical portion extending forward in the optical axis direction is pushed by an eject pin, it is necessary to increase the thickness of the cylindrical portion.
  • the thickness of the cylindrical portion is increased, there arises a problem that the inner diameter size of the cylindrical space for accommodating the lens body of the cylindrical portion becomes smaller, or conversely, the outer diameter size of the cylindrical portion becomes too large.
  • the accuracy of the inner diameter dimension of the cylindrical space is likely to be lowered due to sink marks when the synthetic resin material is solidified.
  • the present invention solves the above-described conventional problems, and can be molded with high dimensional accuracy such as an inner diameter without increasing the thickness of the cylindrical portion of the lens holding member more than necessary.
  • One object is to provide a driving device, a camera module using the lens driving device, and a method of manufacturing the lens driving device.
  • a case in which an opening is formed in a ceiling, a lens holding member on which at least a part is located inside the case and a lens body can be mounted, and the lens holding member is the lens
  • An elastic support member that is movably supported in the direction of the optical axis of the body, a coil disposed on the outer side of a cylindrical portion formed on the lens holding member, and a magnet that is provided in the case and faces the coil
  • a flange portion extending along a circumferential direction around the optical axis is provided on the outer side of the cylindrical portion of the lens holding member, and the flange portion is connected to the coil.
  • Formed on the surface facing the coil in the optical axis direction and facing the coil is a molding mark of an eject pin when the lens holding member is injection molded with a synthetic resin material.
  • the flange portion may be formed at one end of the lens holding member in the optical axis direction.
  • an inner wall portion having a tip portion facing the flange portion is provided inside the case, and the molding mark is formed on the tip portion of the inner wall portion facing the flange portion. Opposing recesses may be formed.
  • the concave portion may be formed in an intermediate portion in the width direction of the inner wall portion.
  • the movement of the lens holding member in the optical axis direction may be restricted when the flange portion hits the tip of the inner wall portion.
  • the case is formed of a magnetic material
  • the inner wall portion functions as an opposing yoke portion
  • the inner wall portion includes the cylindrical portion of the lens holding member and the A magnet located in a gap between the coil and fixed inside the case faces the outside of the coil
  • the molding mark is formed between the cylindrical portion of the lens holding member and the coil. It may be formed at a position opposite to.
  • the molding mark may be formed at a plurality of locations of the flange portion.
  • a camera module includes a 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. And having. *
  • a case in which an opening is formed in the ceiling a lens holding member on which at least a part is located inside the case and on which a lens body can be mounted, and the lens holding member
  • An elastic support member that is movably supported in the optical axis direction of the lens body, a coil disposed on the outer side of a cylindrical portion formed on the lens holding member, and provided in the case and facing the coil
  • a method of manufacturing a lens driving device including: a magnet that injects a synthetic resin material into a mold to mold the lens holding member having the cylindrical portion, and an outer portion of the cylindrical portion of the lens holding member.
  • the flange portion may be formed at one end portion of the lens holding member in the optical axis direction.
  • the method for manufacturing a lens driving device includes providing an inner wall portion with a tip portion facing the flange portion inside the case, and forming the molding at a tip portion of the inner wall portion facing the flange portion. A recess facing the mark may be formed.
  • the concave portion may be formed in an intermediate portion in the width direction of the inner wall portion.
  • the inner wall portion is used as a counter yoke portion, and the lens holding member is incorporated into the case, the inner wall portion is formed. Is inserted into the gap between the cylindrical portion of the lens holding member and the coil, the magnet fixed inside the case is opposed to the outside of the coil, and the molding mark is held by the lens holding You may make it oppose the said inner wall part located in the said clearance gap between the cylindrical part of a member, and the said coil.
  • the molding marks may be formed at a plurality of locations of the flange portion.
  • the lens driving device of the embodiment of the present invention the camera module using the lens driving device, and the manufacturing method of the lens driving device, the inner diameter of the lens holding member is increased without increasing the wall thickness more than necessary. Molding can be performed with high dimensional accuracy such as dimensions.
  • FIG. 4 is a partial cross-sectional view of the lens driving device shown in FIG. 1 taken along line VI-VI.
  • FIG. 9 is an explanatory diagram showing a molding process of the lens holding member, and is a diagram showing a molding process of a portion corresponding to a cross section of the lens holding member cut along line VIII-VIII in FIG.
  • 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.
  • FIG. 4 shows the lens holding member and the coil.
  • FIG. 5 is a side view of the camera module 100 according to the embodiment of the present invention as viewed from, for example, the X1 direction.
  • FIG. 8 shows a state where the lens holding member and the case face each other. *
  • 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 FIGS. 3, 4, and 8, 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) 103 shown in FIG. 5 is attached to the center hole 13a of the cylindrical portion 13.
  • the lens body 103 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 103 is mounted inside the cylindrical portion 13.
  • the lens body 103 is inserted into the center hole 13a, and the lens body 103 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 parallel to the optical axis O of the lens body 103 (optical axis direction).
  • the lens driving device 1 is mounted on a portable electronic device such as a mobile phone.
  • An imaging element 101 such as a CCD is disposed on the Z2 side of the lens driving device 1 as shown in FIG.
  • the lens driving device 1, the lens body 103, and the image sensor 101 are combined to form a camera module 100.
  • the lens holding member 10 and the lens body 103 mounted on the lens holding member 10 move in the Z1-Z2 direction, so that the image focused on the image sensor 101 is automatically focused.
  • the image sensor 101 is mounted on a printed board 102 and faces the lens body 103 in the optical axis direction.
  • a frame-shaped support spacer
  • the lens driving device 1 is placed on this support.
  • a filter for cutting infrared rays is provided between the image sensor 101 and the lens body 103.
  • the lens driving device 1 is provided with a support base 2 and a case 3.
  • a housing having a storage space inside is formed.
  • the support base 2 has a square shape when viewed from the optical axis direction, and is formed of a synthetic resin material that is a nonmagnetic material. As shown in FIG. 3, spring fixing portions 2 a are formed on the four corners of the support base 2. A pair of lower leaf springs 20 separated from each other are mounted on the support base 2. Each of the lower leaf springs 20 includes a fixed-side support portion 21, a movable-side support portion 22 inside thereof, and an elastic arm portion 23 that connects the fixed-side support portion 21 and the movable-side support portion 22 with conductivity. It is integrally formed of a spring metal material. Mounting holes 21a are formed on the X1 side and the X2 side in the fixed side support portion 21 of each lower leaf spring 20. Each mounting hole 21a is fitted into a protrusion formed in the spring fixing portion 2a of the support base 2, and the protrusion is heat squeezed to support the fixing-side support portion 21 of the pair of lower leaf springs 20. It is fixed on the base 2.
  • each lower leaf spring 20 has attachment holes 22a on the X1 side and the X2 side.
  • spring fixing portions 10b are provided on the X1 side and the X2 side.
  • a protrusion 10c protruding in the Z2 direction is integrally formed on the Y1 side
  • a protrusion 10d protruding in the Z2 direction is integrally formed on the Y2 side.
  • the mounting hole 22a formed in the movable side support part 22 of the lower leaf spring 20 on the Y1 side is fitted to the protrusion 10c, and the protrusion 10c is heat caulked so that the movable side support part of the one lower leaf spring 20 is heated. 22 is fixed to the spring fixing portion 10 b on the lower surface of the lens holding member 10. Similarly, the other lower leaf spring 20 is fixed to the spring fixing portion 10b by fitting the mounting hole 22a of the lower leaf spring 20 on the Y2 side to the protrusion 10d and heat caulking the protrusion 10d. *
  • 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 2 has a light transmission hole 2 b at the center, but an opening 3 b is also opened at the ceiling 3 a of the case 3.
  • the light transmitting hole 2b of the support base 2 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 as outer wall portions and a square side plate portion 3e that connects the respective planar side plate portions 3d.
  • the outer wall portion is formed in a cylindrical shape by the four flat side plate portions 3d and the four square side plate portions 3e.
  • the planar shape of the opening 3b formed in the ceiling 3a is a quadrangular shape, and an inner wall 3c bent in the Z2 direction is integrally formed from the four corners of the inner edge of the opening 3b. Yes.
  • the inner wall portion 3c faces the inner surface of each square side plate portion 3e from the inside of the case and functions as a counter yoke portion. *
  • the ceiling portion 3a of the case 3 has a rectangular planar shape when viewed from above in the optical axis direction, and the first through portion 4a or the first through portion 4b is formed at four corners thereof.
  • the first through portions 4a and 4b face the magnet M fixed inside the case 3 in the Z1 direction.
  • the first penetration part 4a is formed at three corners of the ceiling part 3a, and is a circular (perfect circle) hole that penetrates the ceiling part 3a in the Z1-Z2 direction.
  • the first penetrating portion 4b is formed at one corner of the ceiling portion 3a, and is a long hole (or elliptical hole) penetrating the ceiling portion 3a in the Z1-Z2 direction.
  • the longitudinal direction of the elongated hole is directed in the radial direction with the optical axis O as the center.
  • the four first through portions may all be circular through holes, but it is preferable that at least one of the four first through portions is a long hole. *
  • 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 connects the substantially rectangular frame-shaped fixed-side support portion 31, the ring-shaped movable-side support portion 32 inside thereof, and the fixed-side support portion 31 and the movable-side support portion 32 at four locations.
  • the elastic arm portion 33 is integrally formed of a leaf spring metal material.
  • the four corners of the fixed-side support part 31 serve as attachment parts 31a, and the second penetration part 34a or the second penetration part 34b is formed in each attachment part 31a.
  • the 2nd penetration part 34a provided in two places is a circular hole which penetrates attachment part 31a in the Z1-Z2 direction.
  • the second penetrating portions 34 b provided at the other two locations are notches opened toward the elastic arm portion 33. All of the four second through portions may be through holes, or all may be cutout portions opened toward the elastic arm portion 33. *
  • a support member (spring fixing member) 6 is provided on the outer surface side of the ceiling portion 3 a of the case 3 and further above the upper leaf spring 30 (Z1 direction).
  • the support member 6 is formed in a rectangular shape by a nonmagnetic material such as a synthetic resin material.
  • sandwiching portions 6 a are formed at four corners on the lower surface of the support member 6 facing the Z ⁇ b> 2 direction.
  • the protrusions 7 are integrally formed from the respective clamping portions 6a 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.
  • a recessed portion 6 c is formed between the sandwiching portion 6 a and the light transmission hole 6 b and is recessed toward the Z ⁇ b> 1 direction away from the ceiling portion 3 a of the case 3. Yes. *
  • the fixed side support portion 31 (attachment portion 31 a) of the upper leaf spring 30 is installed on the outer surface facing the Z ⁇ b> 1 side of the ceiling portion 3 a of the case 3, and the support member 6 is further stacked on the Z ⁇ b> 1 side.
  • the projections 7 provided at four locations of the support member 6 shown in FIG. 2 are formed at the four attachment portions 31 a of the fixed support portion 31 of the upper leaf spring 30.
  • the penetrating portions 34a and 34b are inserted, and the first penetrating portions 4a and 4b formed at four locations on the ceiling 3a of the case 3 are further inserted.
  • 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 magnet M has an outer surface Ma that is an outer magnetized surface directed outward in the radial direction with the optical axis O as the center, and a magnetized surface Mg that faces the optical axis O. is doing.
  • the magnetized surface Mg which is the inner magnetized surface, has a concave curved surface shape along a cylindrical surface with the optical axis O as the center.
  • 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 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. Thereby, an adhesive agent is interposed between the inner surface of the case 3 and each magnet M. Further, since a gap is formed between the flat outer surface Ma of the magnet M and the inner surface of the corner side plate portion 3e of the case 3, the gap is easily filled with an adhesive. As shown in FIG.
  • each magnet M has an upper surface Mb facing in the Z ⁇ b> 1 direction abutted against a Z ⁇ b> 2 side tip portion 7 a of the projection 7 formed on the support member 6, and the corner side plate portion of the case 3.
  • the magnet M is positioned in the Z1 direction (optical axis O direction) inside 3e.
  • the lens driving device 1 When the lens driving device 1 is assembled, a part of the fluid adhesive provided between the inner surfaces of the corner side plate portion 3e and the flat side plate portion 3d of the case 3 and the magnet M is formed on the support member 6. Flows into the gap between the protruding portion 7 and the first through portions 4 a and 4 b formed in the ceiling portion 3 a of the case 3. Then, the adhesive penetrates between the outer surface of the ceiling portion 3a facing the Z1 direction and the attachment portion 31a of the fixed side support portion 31 of the upper leaf spring 30 by a capillary phenomenon.
  • the adhesive is thermally cured, and the respective magnets M are bonded and fixed inside the case 3, and the outer surface of the ceiling portion 3a of the case 3 and the mounting portion 31a of the upper leaf spring 30 are bonded and fixed.
  • the adhesive that fixes the case 3 and the magnet M continues to the gap between the protrusion 7 and the first through portions 4a and 4b, and further penetrates between the ceiling portion 3a and the upper leaf spring 30. Since all are fixed together, it becomes possible to perform the process of supplying the adhesive in common.
  • the support member 6 has a recess 6c formed between the clamping portion 6a and the light transmission hole 6b, and the elastic arm portion 33 of the upper leaf spring 30 faces the recess 6c. To do. Therefore, it is possible to prevent the elastic arm portion 33 from hitting the support member 6 when the elastic arm portion 33 is deformed.
  • the lens holding member 10 is made of a nonmagnetic synthetic resin material. As shown in FIGS. 3, 4, and 8, a spring fixing portion 10 a is provided on the upper surface of the cylindrical portion 13 of the lens holding member 10 facing the Z ⁇ b> 1 direction. After the magnet M is fixed inside the case 3 and the upper leaf spring 30 and the support member 6 are fixed outside the ceiling portion 3a of the case 3, the lens holding member 10 and the lower leaf spring 20 around which the coil 40 is wound The assembly in which the support base 2 is assembled is inserted into the case 3 from below. As shown in FIG.
  • the spring fixing portion 10 a of the lens holding member 10 passes through the opening 3 b formed in the ceiling portion 3 a of the case 3 and protrudes upward (Z1 direction) from the outer surface of the ceiling portion 3 a.
  • fixed part 10a is abutted by the lower side of the movable side support part 32 of the upper leaf
  • the elastic arm portion 23 provided on the lower leaf spring 20 is formed in a thin curved shape, that is, a meandering shape
  • the elastic arm portion 33 provided on the upper leaf spring 30 is also It is formed into a thin curved shape, that is, a meandering shape.
  • the lower end of the lens holding member 10 and the support base 2 are connected via a lower leaf spring 20, and the upper end of the cylindrical portion 13 of the lens holding member 10 and the ceiling portion 3 a of the case 3 are connected to the upper leaf spring 30. It is connected via.
  • the lens holding member 10 is moved along the optical axis direction Z1- in the case 3 by elastic deformation of both the elastic arm portion 23 of the lower leaf spring 20 and the elastic arm portion 33 of the upper leaf spring 30. It is supported so as to be movable in the Z2 direction. That is, the lower plate spring 20 and the upper plate spring 30 constitute an elastic support member that supports the lens holding member 10 so as to be movable in the optical axis direction.
  • 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 is formed at a position biased toward the Z2 side which is one end portion in the optical axis direction of the lens holding member 10, and is formed integrally with the end portion on the Z2 side of the cylindrical portion 13.
  • the flange portion 11 is formed so as to extend along a circumferential direction (circumferential direction) around the optical axis O.
  • the flange portion 11 may have a bowl shape extending continuously in the circumferential direction, or may be formed intermittently in the circumferential direction.
  • a defect portion 11 b is formed on both the Y1 side and the Y2 side. *
  • 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).
  • a coil winding surface 14 is formed between the flange portion 11 and the restriction projection 12 on the outer side of the cylindrical portion 13 of the lens holding member 10.
  • a flank outer surface 15 that recedes toward the optical axis O rather than the coil winding surface 14 is formed on the outer side of the lens holding member 10 (tubular portion 13).
  • a molding mark 16 is formed on the surface of the flange portion 11 facing the Z ⁇ b> 1 direction, that is, the surface 11 a facing the coil 40.
  • This molding mark 16 (or indentation) is formed by the tip portion of an eject pin that is used when the lens holding member 10 after molding is separated from the mold in an injection molding process described later.
  • the molding mark 16 is formed on the flange portion 11 corresponding to the outer peripheral side portion of the flank outer surface 15 at a place where the regulation protrusion 12 is not formed.
  • the molding mark 16 is formed in a size corresponding to the diameter of the eject pin.
  • the molding mark 16 is formed in the flange portion 11 and is not formed in the tip portion facing the Z1 side of the cylindrical portion 13, thereby forming a cylindrical shape. It is possible to avoid forming the portion 13 with an excessive thickness, and the cylindrical portion 13 can be formed with an optimal thickness. As a result, even if the inner diameter dimension of the center hole 13a is relatively large, it is not necessary to excessively increase the outer dimension of the cylindrical portion 13, and a lens having a large aperture can be provided. Can be configured small. In addition, by appropriately setting the wall thickness of the cylindrical portion 13, it is possible to suppress the phenomenon of sink due to the solidification of the resin material when the cylindrical portion 13 is molded, and to improve the dimensional accuracy of the cylindrical portion 13. Can be kept high.
  • 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 that fixes the winding start end 41a of the conducting wire 41 forming the coil 40
  • the protrusion 19b located on the Y2 side is a winding projection that fixes the winding end 41b of the conducting wire 41.
  • the conducting wire 41 for forming the coil 40 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 coating layer is removed at the winding start end 41a of the conducting wire 41, and the winding start end 41a is wound around the protrusion 19a on the Y1 side shown in FIG.
  • the conducting wire 41 extending from the protrusion 19a passes through the missing portion 11b on the Y1 side of the flange portion 11 and is guided onto the flange portion 11, and the conducting wire 41 is coiled between the flange portion 11 and the restricting projection portion 12.
  • a plurality of turns are wound around the surface 14.
  • the conductive wire 41 is heated by applying hot air or the like, and the insulating layer is fusion-bonded by melting of the fusion layer to form the coil 40.
  • the conductive wire 41 that has finished winding the coil 40 passes through the missing portion 11b on the Y2 side of the flange portion 11 and is drawn to the lower surface side of the lens holding member 10.
  • the winding end 41b of the conducting wire 41 is wound around the protrusion 19b of the lens holding member 10 on the Y2 side shown in FIG. *
  • the protrusions 10 c and 10 d formed on the spring fixing portions 10 b and 10 b on the lower surface of the lens holding member 10 facing the Z ⁇ b> 2 direction correspond to the corresponding formed on the movable side support portion 22 of the lower leaf spring 20. It is inserted through the mounting hole 22a, and the tips of the projections 10c, 10d are fixed by heat caulking.
  • the winding start end 41a of the conducting wire 41 wound around the Y1 side protrusion 19a is in a state of being substantially in contact with the movable side support portion 22 of the lower leaf spring 20 on the Y1 side, and the winding start end 41a and the movable side support portion 22 are soldered. Attached.
  • the winding end 41b of the conductive wire 41 wound around the Y2 side protrusion 19b and the movable side support portion 22 of the Y2 side lower leaf spring 20 are also in contact with each other and soldered. As a result, one lower leaf spring 20 is conducted to the winding start end 41a of the conducting wire 41, and the other lower leaf spring 20 is conducted to the winding end 41b.
  • the lens holding member 10 is a portion where the restricting protrusion 12 does not exist.
  • a clearance (i) is formed between the flank outer surface 15 and the coil 40.
  • the gap (i) is formed at four locations on the outer side of the lens holding member 10 (tubular portion 13).
  • FIG. 7 when the lens holding member 10 is housed in the case 3 and the upper end portion of the lens holding member 10 and the movable side support portion 32 of the upper leaf spring 30 are fixed, the opening of the case 3 is opened.
  • the magnetized surface Mg of the magnet M faces the outside of the coil 40, and the inner wall portion 3 c that is a facing yoke portion faces the inside of the coil 40. Further, the inner wall portion 3 c protruding from the ceiling portion 3 a to the Z2 side (flange portion 11 side) is opposed to the flank outer surface 15 whose plate-like portion (inner surface portion) is the outer peripheral surface of the cylindrical portion 13 of the lens holding member 10. In addition, the front end 3f of the inner wall 3c faces the flange 11. *
  • a metal plate divided into three parts is embedded in the support base 2 shown in FIG. 3, and a part of each of the two metal plates serves as a connection terminal 45 on the side of the support base 2. Protrudes downward from An exposed portion where a part of the metal plate forming the connection terminal 45 is exposed is provided on the upper surface of the support base 2, and this exposed portion and the fixed-side support portion 21 of the lower leaf spring 20 are soldered or welded.
  • the two connection terminals 45 are electrically connected to the two lower leaf springs 20 on a one-to-one basis. Therefore, the drive current can be supplied to the coil 40 from the two connection terminals 45 via the lower leaf springs 20.
  • one metal plate that does not constitute the connection terminal 45 is the X1 side and the Y1 side inside the support base 2. And embedded in a U shape so as to extend along the side of the Y2 side. A part of this metal plate protrudes outward as a grounding terminal 46 at the corner of the support base 2 as shown in FIGS. As shown in FIG. 7, when the support base 2 and the case 3 are combined, the ground terminal 46 is joined to the case 3, and the case 3 is set to the ground potential.
  • FIG. 9 shows a molding method for injection molding the lens holding member 10.
  • a mold 50 used for injection molding includes, for example, a first mold 51 and a second mold 52 that are separably combined in the Z1-Z2 direction to form the cylindrical portion 13 and the flange portion 11, and a center hole.
  • a third mold (nesting) 53 for forming 13a and a fourth mold (nesting) (not shown) for forming the regulation protrusion 12 and the coil winding surface 14 are formed.
  • the shape and combination of individual molds are appropriately designed according to the shape of the lens holding member 10. Further, when the internal thread portion is formed on the inner peripheral surface of the center hole 13 a of the cylindrical portion 13, the external thread portion is formed on the outer peripheral surface of the third mold (nesting) 53 and the third metal mold is formed.
  • the mold 53 is configured to be movable in the Z1-Z2 direction while rotating.
  • the flange part 11 in the part which opposes the control protrusion 12 is formed of the 2nd metal mold
  • the first mold 51 is equipped with an eject pin 54 slidable in the Z1-Z2 direction.
  • the lens holding member 10 is molded by cooling the mold. Thereafter, the respective molds are separated, and the molded lens holding member 10 is pushed in the Z2 direction by the eject pin 54, so that the lens holding member 10 is separated from the first mold 51. On the surface 11a facing the Z1 side of the flange portion 11, a molding mark 16 or an indentation that follows the shape of the tip portion of the eject pin 54 is formed. Moreover, the molten resin injected into the cavity may enter the gap between the first mold 51 and the eject pin 54, and a small burr 16 a may remain around the molding mark 16. *
  • the force F for separating the lens holding member 10 from the first mold 51 is balanced.
  • the flange portion 11 is pushed by the eject pin 54 and the tip end portion on the Z1 side of the tubular portion 13 is not pushed by the eject pin 54, the thickness of the tubular portion 13 is reduced to an optimum dimension.
  • the support member 6, the upper leaf spring 30, and the case 3 are sequentially stacked, and the protrusion 7 that protrudes in the Z ⁇ b> 2 direction from the clamping portion 6 a of the support member 6 is formed on the upper leaf spring 30.
  • the second through portions 34a and 34b are inserted, and the first through portions 4a and 4b formed in the ceiling portion 3a are inserted.
  • a heated jig is applied to the tip portions of the protrusions 7 facing in the Z2 direction, and the tip portions of the protrusions 7 are heated to form a caulking deformed portion.
  • the support member 6 and the upper leaf spring 30 and the ceiling 3a of the case 3 are fixed by heat caulking.
  • the height dimension from the outer surface facing the Z1 direction of the support member 6 to the tip end portion facing the Z2 direction of the protrusion 7 is adjusted, so that the inside of the case 3 of the magnet M to be incorporated later is adjusted.
  • the height position of can be set with high accuracy.
  • thermosetting adhesive having fluidity is interposed between the inner surface of the case 3 and the magnet M arranged so that the Z1 direction (ceiling portion 3a) is the direction of gravity.
  • the magnets M are magnetically attracted to the inner surface of the case 3, and the respective magnets M are slid along the inner surface of the case 3 in the Z ⁇ b> 1 direction.
  • the upper surface Mb is abutted against the tip of the protrusion 7 facing the Z2 side, and each magnet M is positioned.
  • the adhesive is partly formed between the first through portions 4a and 4b and the outer peripheral surface of the protrusion 7 extending from the support member 6 by the force of gravity and the force of pressing the magnet M in the Z1 direction. It penetrates into the gap and further permeates by capillarity between the outer surface of the ceiling portion 3a and the attachment portion 31a of the upper leaf spring 30.
  • the case 3 and the magnet M are bonded and fixed by curing the thermosetting adhesive, and the ceiling portion 3a of the case 3 and the mounting portion 31a of the upper leaf spring 30 are bonded and fixed.
  • the attachment portion 31a of the upper leaf spring 30 and the support member 6 are also bonded and fixed.
  • the lens holding member 10 is incorporated into the case 3.
  • the lens holding member 10 around which the coil 40 is wound is fixed on the support base 2 via the lower leaf spring 20.
  • An assembly in which the support base 2, the lower leaf spring 20, the lens holding member 10 and the coil 40 are assembled is inserted into the case 3, and a spring fixing portion 10 a formed at the upper part of the lens holding member 10 on the Z1 side is inserted.
  • the upper plate spring 30 is fixed to the movable side support portion 32 with an adhesive.
  • the support base 2 and the case 3 are also fixed by an adhesive or welding. *
  • the lens holding member 10 supported by the lower leaf spring 20 and the upper leaf spring 30 which are elastic supporting members is moved in the Z2 direction. And stable. At this time, a part of the lower surface side of the lens holding member 10 and a part of the support base 2 are in contact with each other. Further, the surface 11a facing the Z1 direction of the flange portion 11 is opposed to the tip portion 3f of the inner wall portion 3c of the case 3 facing the Z2 direction by a distance H.
  • the lens holding member 10 is driven in the optical axis direction (Z1 direction) by an electromagnetic force generated by a current flowing through the coil 40 and a magnetic field generated from the magnet M.
  • the image formed on the image sensor 101 is focused by the lens body 103 held by the lens holding member 10.
  • the lens holding member 10 moves greatly in the Z1 direction due to noise or the like superimposed on the driving current applied to the coil 40, or a strong external impact due to dropping or the like occurs.
  • the surface 11a of the flange portion 11 hits the tip portion 3f of the inner wall portion 3c.
  • the tip 3f of the inner wall 3c By causing the tip 3f of the inner wall 3c to function as a stopper, the lens holding member 10 is prevented from excessively moving in the Z1 direction, and the lower leaf spring 20 and the upper leaf spring 30 that are elastic support members are more than necessary. The deformation can be restricted.
  • a molding mark 16 (or an impression) by the eject pin 54 is formed on the outer side of the flank outer surface 15.
  • the flange portion 1 is used.
  • the outward projecting width dimension of 1 is preferably small, and the contact area between the eject pin 54 and the flange portion 11 is preferably as large as possible.
  • the diameter of the molding mark 16 increases with respect to the width dimension of the flange portion 11, and a part of the molding mark 16 faces the front end portion 3 f of the inner wall portion 3 c of the case 3.
  • the molding mark 16 hits the tip 3f of the inner wall 3c. At this time, as shown in FIG. If formed, the burr 16a may be peeled off due to contact with the tip 3f and fall into the movable part in the case 3.
  • a concave portion 3g that is recessed in a direction away from the flange portion 11 is formed in the distal end portion 3f of the inner wall portion 3c of the case 3. Even if the flange portion 11 of the lens holding member 10 hits the tip portion 3f, the tip portion 3f does not directly hit the molding mark 16 because the concave portion 3g faces the molding mark 16 apart. Therefore, it is possible to prevent the burr 16a from being separated from the surface 11a of the flange portion 11. As shown in FIG.
  • the recess 3g is formed at the center of the width dimension W of the inner wall 3c, when the lens holding member 10 moves greatly in the Z1 direction,
  • the front end portions 3f located on both sides of the concave portion 3g come into contact with both sides of the flange portion 11 with the molding mark 16 interposed therebetween, and the surface 11a of the flange portion 11 and the front end portion 3f stably come into contact with each other.
  • 3f can function as a stopper portion.
  • the width dimension of the recess 3g is formed to be larger than the width dimension of the molding mark 16 in the portion facing the recess 3g.
  • the number of molding marks 16 formed on the flange portion 11 is four, but other numbers may be used. Further, the shape of the molding mark 16 is not limited to a circle, and may be an elliptical shape or other shapes. *
  • the winding start end 41 a and the winding end 41 b of the conducting wire 41 constituting the coil 40 are wound around the protrusions 19 a and 19 b on the lower surface of the lens holding member 10. And the respective lower leaf springs 20 are soldered and conducted.
  • the winding start end 41a and the winding end 41b of the conducting wire 41 extending from the coil 40 are directly soldered and connected to the respective lower leaf springs 20, Good. *
  • the lens driving device that performs the automatic focusing by driving the lens holding member 10 that is a lens holding member only in the optical axis direction
  • the present invention can be applied to a lens driving device that can perform so-called camera shake correction by driving a movable unit that performs automatic focusing in a direction crossing the optical axis direction.
  • the upper leaf spring is divided into two, and the winding start end 41a and winding end 41b of the conductive wire 41 of the coil 40 are connected to each upper leaf spring with solder or conductive adhesive. Be joined.
  • the eject pin is provided on the surface of the flange portion formed at the position facing the coil in the outer portion of the cylindrical portion.
  • the lens holding member after molding is detached from the mold.
  • the thickness of the cylindrical portion can be reduced by applying the eject pin to the flange portion instead of the tip portion of the cylindrical portion that holds the lens body.
  • the inner diameter dimension of the cylindrical portion can be increased, and further, the outer dimension of the lens holding member can be prevented from becoming excessive.
  • the influence of sink marks when the resin forming the cylindrical portion is solidified can be reduced, and the dimensional accuracy of the cylindrical portion can be easily maintained at a high level.
  • the thickness of the cylindrical portion of the lens holding member is increased more than necessary. Therefore, it is useful in that it can be molded with high dimensional accuracy such as inner diameter.

Landscapes

  • Lens Barrels (AREA)

Abstract

The purpose of the invention is to optimally set the thickness of a cylindrical part by forming a molding trace of an eject pin in a flange part and not forming the molding trace in the cylindrical part at the time of molding a lens holding member with a synthetic resin material. More specifically, this lens holding member comprises a cylindrical part and a flange part. A molding trace of an eject pin for separation from a mold in an injection molding step is formed on a surface of the flange part facing a coil. A case is provided with an inner wall part serving as a stopper part against which the flange part abuts, and an end part of the inner wall part has a recess formed therein so as not to abut against the molding trace.

Description

レンズ駆動装置、前記レンズ駆動装置を使用したカメラモジュールおよびレンズ駆動装置の製造方法LENS DRIVE DEVICE, CAMERA MODULE USING THE LENS DRIVE DEVICE, AND METHOD FOR MANUFACTURING LENS DRIVE DEVICE
本発明は、レンズ体が搭載されるレンズ保持部材と、前記レンズ保持部材に巻かれたコイルと、前記コイルに対向する磁石とを有するレンズ駆動装置、前記レンズ駆動装置を使用したカメラモジュールおよびレンズ駆動装置の製造方法に関する。 The present invention relates to a lens driving device including a lens holding member on which a lens body is mounted, a coil wound around the lens holding member, and a magnet facing the coil, a camera module using the lens driving device, and a lens The present invention relates to a method for manufacturing a drive device.
例えば特許文献１に、レンズ駆動装置に関する発明が記載されている。　 For example, Patent Document 1 describes an invention relating to a lens driving device. *
このレンズ駆動装置は、レンズ体を搭載可能なレンズ保持部材と、支持部材とを有している。レンズ保持部材は、下側板ばねと上側板ばねを介して支持部材に支持されている。　 The lens driving device includes a lens holding member on which a lens body can be mounted and a support member. The lens holding member is supported by the support member via the lower leaf spring and the upper leaf spring. *
レンズ保持部材には、周回方向の全域に連続して側方へ突出する鍔部と、周回方向に間隔を空けて形成されて前記鍔部と光軸方向で対向する突部とが一体に形成されている。前記鍔部と前記突部との間で、レンズ保持部材の外側部に導線が巻かれて前記コイルの巻回部が形成されている。　 The lens holding member is integrally formed with a flange that protrudes laterally continuously over the entire area in the circumferential direction and a protrusion that is spaced apart in the circumferential direction and faces the collar in the optical axis direction. Has been. A conducting wire is wound around the outer side of the lens holding member between the flange and the protrusion to form a winding portion of the coil. *
支持部材側には、磁石が固定されており、この磁石が前記コイルの巻回部に対向している。支持部材に埋設された金属部材に接続端子部が形成されており、この接続端子部から、下側板ばねを介してコイルに駆動電流が与えられて、レンズ保持部材が、レンズ体の光軸方向へ移動させられる。この動作によって、撮像素子への像の焦点が合わせられる。 A magnet is fixed on the support member side, and this magnet faces the winding portion of the coil. A connection terminal portion is formed on a metal member embedded in the support member, and a drive current is applied from the connection terminal portion to the coil via the lower leaf spring, so that the lens holding member is in the optical axis direction of the lens body. Moved to. By this operation, the image is focused on the image sensor.
特開２０１５－９９３２２号公報Japanese Patent Laying-Open No. 2015-99322
特許文献１に記載されたレンズ保持部材は、合成樹脂材料で射出成型される。射出成型工程では、金型のキャビティ内に溶融状態の合成樹脂材料が射出され、合成樹脂材料が固化した後に、金型が分離されて、イジェクトピンを用いて、成型後のレンズ保持部材が取り出される。　 The lens holding member described in Patent Document 1 is injection-molded with a synthetic resin material. In the injection molding process, the molten synthetic resin material is injected into the mold cavity, and after the synthetic resin material is solidified, the mold is separated and the molded lens holding member is taken out using the eject pin. It is. *
このとき、レンズ保持部材において光軸方向の前方に延びる筒状部の先端部をイジェクトピンで押す構造にすると、筒状部の肉厚を大きくすることが必要になる。筒状部の肉厚を大きくすると、筒状部のレンズ体を収納する円筒空間の内径寸法が小さくなったり、逆に、筒状部の外径寸法が大きくなりすぎる問題が生じる。さらに、筒状の肉厚が大きくなると、合成樹脂材料の固化時のヒケにより、円筒空間の内径寸法の精度が低下しやすくなる。　 At this time, if the lens holding member has a structure in which the tip of the cylindrical portion extending forward in the optical axis direction is pushed by an eject pin, it is necessary to increase the thickness of the cylindrical portion. When the thickness of the cylindrical portion is increased, there arises a problem that the inner diameter size of the cylindrical space for accommodating the lens body of the cylindrical portion becomes smaller, or conversely, the outer diameter size of the cylindrical portion becomes too large. Furthermore, when the cylindrical thickness is increased, the accuracy of the inner diameter dimension of the cylindrical space is likely to be lowered due to sink marks when the synthetic resin material is solidified. *
本発明は、上記従来の課題を解決するものであり、レンズ保持部材の筒状部の肉厚を必要以上に大きくすることなく、内径寸法などの寸法精度を高くして成型することができるレンズ駆動装置、前記レンズ駆動装置を使用したカメラモジュールおよびレンズ駆動装置の製造方法を提供することを１つの目的としている。 The present invention solves the above-described conventional problems, and can be molded with high dimensional accuracy such as an inner diameter without increasing the thickness of the cylindrical portion of the lens holding member more than necessary. One object is to provide a driving device, a camera module using the lens driving device, and a method of manufacturing the lens driving device.
本発明の一実施形態において、天井部に開口部が形成されたケースと、少なくとも一部が前記ケースの内側に位置してレンズ体を搭載可能なレンズ保持部材と、前記レンズ保持部材を前記レンズ体の光軸方向へ移動自在に支持する弾性支持部材と、前記レンズ保持部材に形成された筒状部の外側部に配置されたコイルと、前記ケース内に設けられて前記コイルに対向する磁石と、を有するレンズ駆動装置は、前記レンズ保持部材の筒状部の外側部に、前記光軸を中心とする周回方向に沿うように延びるフランジ部が設けられ、前記フランジ部が、前記コイルと前記光軸方向で対向しており、前記フランジ部の前記コイルに向く表面に、前記レンズ保持部材を合成樹脂材料で射出成型したときのイジェクトピンの成型痕が形成されている。　 In one embodiment of the present invention, a case in which an opening is formed in a ceiling, a lens holding member on which at least a part is located inside the case and a lens body can be mounted, and the lens holding member is the lens An elastic support member that is movably supported in the direction of the optical axis of the body, a coil disposed on the outer side of a cylindrical portion formed on the lens holding member, and a magnet that is provided in the case and faces the coil And a flange portion extending along a circumferential direction around the optical axis is provided on the outer side of the cylindrical portion of the lens holding member, and the flange portion is connected to the coil. Formed on the surface facing the coil in the optical axis direction and facing the coil is a molding mark of an eject pin when the lens holding member is injection molded with a synthetic resin material. *
本発明の一実施形態のレンズ駆動装置は、前記フランジ部が、光軸方向における前記レンズ保持部材の一端部に形成されていてもよい。　 In the lens driving device according to an embodiment of the present invention, the flange portion may be formed at one end of the lens holding member in the optical axis direction. *
本発明の一実施形態のレンズ駆動装置は、前記ケースの内部に、先端部が前記フランジ部に対向する内壁部が設けられ、前記内壁部の前記フランジ部に向く先端部に、前記成型痕に対向する凹部が形成されていてもよい。　 In the lens driving device according to an embodiment of the present invention, an inner wall portion having a tip portion facing the flange portion is provided inside the case, and the molding mark is formed on the tip portion of the inner wall portion facing the flange portion. Opposing recesses may be formed. *
本発明の一実施形態のレンズ駆動装置は、前記凹部が、前記内壁部の幅方向の中間部に形成されていてもよい。　 In the lens driving device according to an embodiment of the present invention, the concave portion may be formed in an intermediate portion in the width direction of the inner wall portion. *
本発明の一実施形態のレンズ駆動装置は、前記フランジ部が前記内壁部の先端部に当たって、前記レンズ保持部材の前記光軸方向の移動が規制されてもよい。　 In the lens driving device according to the embodiment of the present invention, the movement of the lens holding member in the optical axis direction may be restricted when the flange portion hits the tip of the inner wall portion. *
本発明の一実施形態のレンズ駆動装置は、前記ケースが磁性材料で形成されて、前記内壁部が対向ヨーク部として機能しており、前記内壁部が、前記レンズ保持部材の筒状部と前記コイルとの間の隙間内に位置し、前記ケースの内部に固定された磁石が、前記コイルの外側に対向し、前記成型痕は、前記レンズ保持部材の筒状部と前記コイルとの前記隙間に対向する位置に形成されていてもよい。　 In the lens driving device according to an embodiment of the present invention, the case is formed of a magnetic material, the inner wall portion functions as an opposing yoke portion, and the inner wall portion includes the cylindrical portion of the lens holding member and the A magnet located in a gap between the coil and fixed inside the case faces the outside of the coil, and the molding mark is formed between the cylindrical portion of the lens holding member and the coil. It may be formed at a position opposite to. *
本発明の一実施形態のレンズ駆動装置は、前記成型痕が、前記フランジ部の複数個所に形成されていてもよい。　 In the lens driving device according to an embodiment of the present invention, the molding mark may be formed at a plurality of locations of the flange portion. *
次に、本発明の一実施形態のカメラモジュールは、前記いずれかに記載のレンズ駆動装置と、前記レンズ駆動装置の前記レンズ保持部材に保持されたレンズ体と、前記レンズ体に対向する撮像素子と、を有する。　 Next, a camera module according to an embodiment of the present invention includes a 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. And having. *
さらに、本発明の一実施形態において、天井部に開口部が形成されたケースと、少なくとも一部が前記ケースの内側に位置してレンズ体を搭載可能なレンズ保持部材と、前記レンズ保持部材を前記レンズ体の光軸方向へ移動自在に支持する弾性支持部材と、前記レンズ保持部材に形成された筒状部の外側部に配置されたコイルと、前記ケース内に設けられて前記コイルに対向する磁石と、を有するレンズ駆動装置の製造方法は、金型内に合成樹脂材料を射出して前記筒状部を有する前記レンズ保持部材を成型し、前記レンズ保持部材の筒状部の外側部に、前記光軸を中心とする周回方向に沿うように延びるフランジ部を形成し、前記フランジ部の前記光軸方向に向く表面をイジェクトピンで押し、成型後の前記レンズ保持部材を前記金型から離脱させて、前記フランジ部の表面に、前記イジェクトピンによる成型痕を形成し、前記レンズ保持部材の筒状部の外側部に、前記フランジ部に対向する前記コイルを装備させる。　 Furthermore, in one embodiment of the present invention, a case in which an opening is formed in the ceiling, a lens holding member on which at least a part is located inside the case and on which a lens body can be mounted, and the lens holding member An elastic support member that is movably supported in the optical axis direction of the lens body, a coil disposed on the outer side of a cylindrical portion formed on the lens holding member, and provided in the case and facing the coil A method of manufacturing a lens driving device including: a magnet that injects a synthetic resin material into a mold to mold the lens holding member having the cylindrical portion, and an outer portion of the cylindrical portion of the lens holding member. Forming a flange portion extending along a circumferential direction centering on the optical axis, pressing a surface of the flange portion facing the optical axis direction with an eject pin, and attaching the lens holding member after molding to the mold From By de, on the surface of the flange portion, to form a molded mark by the ejector pin, the outer portion of the cylindrical portion of the lens holding member, to be equipped with the coil that faces the flange portion. *
本発明の一実施形態のレンズ駆動装置の製造方法は、前記フランジ部を、光軸方向における前記レンズ保持部材の一端部に形成してもよい。　 In the method for manufacturing a lens driving device according to an embodiment of the present invention, the flange portion may be formed at one end portion of the lens holding member in the optical axis direction. *
本発明の一実施形態のレンズ駆動装置の製造方法は、前記ケースの内部に、先端部が前記フランジ部に対向する内壁部を設け、前記内壁部の前記フランジ部に向く先端部に、前記成型痕に対向する凹部を形成してもよい。　 The method for manufacturing a lens driving device according to an embodiment of the present invention includes providing an inner wall portion with a tip portion facing the flange portion inside the case, and forming the molding at a tip portion of the inner wall portion facing the flange portion. A recess facing the mark may be formed. *
本発明の一実施形態のレンズ駆動装置の製造方法は、前記凹部を、前記内壁部の幅方向の中間部に形成してもよい。　 In the method for manufacturing a lens driving device according to an embodiment of the present invention, the concave portion may be formed in an intermediate portion in the width direction of the inner wall portion. *
本発明の一実施形態のレンズ駆動装置の製造方法は、前記ケースを磁性材料で形成して、前記内壁部を対向ヨーク部とし、前記ケース内に前記レンズ保持部材を組み込む際に、前記内壁部を、前記レンズ保持部材の筒状部と前記コイルとの間の隙間内に入り込ませ、前記ケースの内部に固定された磁石を、前記コイルの外側に対向させ、前記成型痕を、前記レンズ保持部材の筒状部と前記コイルとの前記隙間に位置する前記内壁部に対向させてもよい。　 In the method for manufacturing a lens driving device according to an embodiment of the present invention, when the case is formed of a magnetic material, the inner wall portion is used as a counter yoke portion, and the lens holding member is incorporated into the case, the inner wall portion is formed. Is inserted into the gap between the cylindrical portion of the lens holding member and the coil, the magnet fixed inside the case is opposed to the outside of the coil, and the molding mark is held by the lens holding You may make it oppose the said inner wall part located in the said clearance gap between the cylindrical part of a member, and the said coil. *
本発明の一実施形態のレンズ駆動装置の製造方法は、前記成型痕を、前記フランジ部の複数個所に形成してもよい。 In the method for manufacturing a lens driving device according to an embodiment of the present invention, the molding marks may be formed at a plurality of locations of the flange portion.
本発明の一実施形態のレンズ駆動装置、レンズ駆動装置を使用したカメラモジュールおよびレンズ駆動装置の製造方法によれば、レンズ保持部材の筒状部の肉厚を必要以上に大きくすることなく、内径寸法などの寸法精度を高くして成型することができる。 According to the lens driving device of the embodiment of the present invention, the camera module using the lens driving device, and the manufacturing method of the lens driving device, the inner diameter of the lens holding member is increased without increasing the wall thickness more than necessary. Molding can be performed with high dimensional accuracy such as dimensions.
本発明の一実施形態のレンズ駆動装置の外観を示す斜視図である。It is a perspective view which shows the external appearance of the lens drive device of one Embodiment of this invention. 図１に示すレンズ駆動装置の構成部品を示す分解斜視図である。It is a disassembled perspective view which shows the component of the lens drive device shown in FIG. 図１に示すレンズ駆動装置を、上部板ばねと支持部材を除去した状態で示す分解斜視図である。It is a disassembled perspective view which shows the lens drive device shown in FIG. 1 in the state which removed the upper leaf | plate spring and the supporting member. 図３に示すレンズ保持部材とコイルを示す分解斜視図である。It is a disassembled perspective view which shows the lens holding member and coil which are shown in FIG. 本発明の一実施形態のカメラモジュールを示す側面図である。It is a side view which shows the camera module of one Embodiment of this invention. レンズ保持部材と下部板ばねとの固定構造をＺ２側から見た底面図である。It is the bottom view which looked at the fixation structure of a lens holding member and a lower leaf | plate spring from the Z2 side. 図１に示すレンズ駆動装置をＶＩ－ＶＩ線で切断した部分断面図である。FIG. 4 is a partial cross-sectional view of the lens driving device shown in FIG. 1 taken along line VI-VI. レンズ保持部材とケースとの対向状態を、ケースを部分断面で表して示す説明図である。It is explanatory drawing which represents the case in the partial cross section in the opposing state of a lens holding member and a case. レンズ保持部材の成型工程を示す説明図であり、レンズ保持部材を図８のＶＩＩＩ－ＶＩＩＩ線で切断した断面に相当する部分の成形工程を示す図である。FIG. 9 is an explanatory diagram showing a molding process of the lens holding member, and is a diagram showing a molding process of a portion corresponding to a cross section of the lens holding member cut along line VIII-VIII in FIG.
図１と図２に、本発明の一実施形態のレンズ駆動装置１の全体構造が示されており、図３に、支持基台と下部板ばねとレンズ保持部材およびコイル、ならびに磁石とケースが示されている。図４に、レンズ保持部材とコイルが示されている。図５に、本発明の一実施形態のカメラモジュール１００を例えばＸ１方向から見た側面図が示されている。また、図８に、レンズ保持部材とケースとの対向状態が示されている。　 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. FIG. 4 shows the lens holding member and the coil. FIG. 5 is a side view of the camera module 100 according to the embodiment of the present invention as viewed from, for example, the X1 direction. FIG. 8 shows a state where the lens holding member and the case face each other. *
レンズ駆動装置１はレンズ保持部材１０を有している。レンズ保持部材１０は、合成樹脂材料で射出成型されて形成されている。図３と図４および図８に示すように、レンズ保持部材１０は、筒状部１３を有している。筒状部１３は比較的薄肉の円筒体であり、Ｚ１－Ｚ２方向に連続する中心穴１３ａを有している。筒状部１３の中心穴１３ａに図５に示すレンズ体（レンズバレルまたは鏡筒）１０３が装着される。レンズ体１０３は、１枚のレンズまたは複数枚のレンズを組み合わせたレンズ組と、前記レンズまたは前記レンズ組を保持したレンズホルダとから構成される。例えば、中心穴１３ａに雌ねじ部が形成され、レンズホルダの外周面に雄ねじ部が形成されて、雄ねじ部が雌ねじ部に螺着されることで、レンズ体１０３が筒状部１３の内部に装着されて搭載される。あるいは、レンズ体１０３が中心穴１３ａの内部に挿入され、レンズ体１０３と筒状部１３の内面とが接着剤で固定される。　 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 FIGS. 3, 4, and 8, 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) 103 shown in FIG. 5 is attached to the center hole 13a of the cylindrical portion 13. The lens body 103 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. For example, 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 103 is mounted inside the cylindrical portion 13. To be installed. Alternatively, the lens body 103 is inserted into the center hole 13a, and the lens body 103 and the inner surface of the cylindrical portion 13 are fixed with an adhesive. *
各図に示すＺ１－Ｚ２方向は、上下方向であり、レンズ体１０３の光軸Ｏと平行な方向（光軸方向）である。レンズ駆動装置１は、携帯電話などの携帯用電子機器に搭載される。レンズ駆動装置１よりもＺ２側に、図５に示すようにＣＣＤなどの撮像素子１０１が配置される。レンズ駆動装置１と、レンズ体１０３および撮像素子１０１とが組み合わされてカメラモジュール１００が構成される。カメラモジュール１００では、レンズ保持部材１０とこれに搭載されたレンズ体１０３がＺ１－Ｚ２方向へ移動することによって、撮像素子１０１に結像する像の自動焦点合わせが行われる。　 The Z1-Z2 direction shown in each figure is the vertical direction, which is a direction parallel to the optical axis O of the lens body 103 (optical axis direction). The lens driving device 1 is mounted on a portable electronic device such as a mobile phone. An imaging element 101 such as a CCD is disposed on the Z2 side of the lens driving device 1 as shown in FIG. The lens driving device 1, the lens body 103, and the image sensor 101 are combined to form a camera module 100. In the camera module 100, the lens holding member 10 and the lens body 103 mounted on the lens holding member 10 move in the Z1-Z2 direction, so that the image focused on the image sensor 101 is automatically focused. *
図５に示すように、撮像素子１０１は、プリント基板１０２に実装され、光軸方向においてレンズ体１０３と対向している。なお、図５では図示を省略しているが、この例では、プリント基板１０２とレンズ駆動装置１との間には、枠形状をした支持体（スペーサ）が配置されている。また、レンズ駆動装置１は、この支持体に載置されている。さらに、撮像素子１０１とレンズ体１０３との間には、図示を省略しているが、赤外線をカットするためのフィルタが設けられている。　 As shown in FIG. 5, the image sensor 101 is mounted on a printed board 102 and faces the lens body 103 in the optical axis direction. Although not shown in FIG. 5, in this example, a frame-shaped support (spacer) is disposed between the printed board 102 and the lens driving device 1. The lens driving device 1 is placed on this support. Further, although not shown, a filter for cutting infrared rays is provided between the image sensor 101 and the lens body 103. *
図１と図２および図３に示すように、レンズ駆動装置１に、支持基台２とケース３とが設けられている。支持基台２とケース３とを組み合わせることにより、内部に収納空間を有するハウジングが構成される。　 As shown in FIGS. 1, 2, and 3, the lens driving device 1 is provided with a support base 2 and a case 3. By combining the support base 2 and the case 3, a housing having a storage space inside is formed. *
支持基台２は、光軸方向から見た平面形状が四角形状であり、非磁性材料である合成樹脂材料で形成されている。図３に示すように、支持基台２の４箇所の角部の上に、ばね固定部２ａが形成されている。支持基台２の上に、互いに分離された一対の下部板ばね２０が取り付けられている。それぞれの下部板ばね２０は、固定側支持部２１と、その内側の可動側支持部２２、および固定側支持部２１と可動側支持部２２とを繋ぐ弾性腕部２３が、導電性を有する板ばね金属材料で一体に形成されている。それぞれの下部板ばね２０の固定側支持部２１には
、Ｘ１側とＸ２側に取付け穴２１ａが形成されている。それぞれの取付け穴２１ａが、支持基台２のばね固定部２ａに形成された突起に嵌合し、前記突起が熱かしめされることで、一対の下部板ばね２０の固定側支持部２１が支持基台２の上に固定される。　 The support base 2 has a square shape when viewed from the optical axis direction, and is formed of a synthetic resin material that is a nonmagnetic material. As shown in FIG. 3, spring fixing portions 2 a are formed on the four corners of the support base 2. A pair of lower leaf springs 20 separated from each other are mounted on the support base 2. Each of the lower leaf springs 20 includes a fixed-side support portion 21, a movable-side support portion 22 inside thereof, and an elastic arm portion 23 that connects the fixed-side support portion 21 and the movable-side support portion 22 with conductivity. It is integrally formed of a spring metal material. Mounting holes 21a are formed on the X1 side and the X2 side in the fixed side support portion 21 of each lower leaf spring 20. Each mounting hole 21a is fitted into a protrusion formed in the spring fixing portion 2a of the support base 2, and the protrusion is heat squeezed to support the fixing-side support portion 21 of the pair of lower leaf springs 20. It is fixed on the base 2.
図３に示すように、それぞれの下部板ばね２０の可動側支持部２２には、Ｘ１側とＸ２側に取付け穴２２ａが形成されている。図６の底面図に示すように、レンズ保持部材１０のＺ２方向に向けられた下面では、Ｘ１側とＸ２側にばね固定部１０ｂが設けられている。それぞれのばね固定部１０ｂでは、Ｙ１側にＺ２方向へ突出する突起１０ｃが一体に形成され、Ｙ２側にＺ２方向に突出する突起１０ｄが一体に形成されている。Ｙ１側の下部板ばね２０の可動側支持部２２に形成された取付け穴２２ａを、突起１０ｃに嵌合させ、前記突起１０ｃを熱かしめすることで、一方の下部板ばね２０の可動側支持部２２が、レンズ保持部材１０の下面のばね固定部１０ｂに固定される。同様に、Ｙ２側の下部板ばね２０の取付け穴２２ａを前記突起１０ｄに嵌合して突起１０ｄを熱かしめすることで、他方の下部板ばね２０もばね固定部１０ｂに固定される。　 As shown in FIG. 3, the movable side support portion 22 of each lower leaf spring 20 has attachment holes 22a on the X1 side and the X2 side. As shown in the bottom view of FIG. 6, on the lower surface of the lens holding member 10 facing in the Z2 direction, spring fixing portions 10b are provided on the X1 side and the X2 side. In each spring fixing portion 10b, a protrusion 10c protruding in the Z2 direction is integrally formed on the Y1 side, and a protrusion 10d protruding in the Z2 direction is integrally formed on the Y2 side. The mounting hole 22a formed in the movable side support part 22 of the lower leaf spring 20 on the Y1 side is fitted to the protrusion 10c, and the protrusion 10c is heat caulked so that the movable side support part of the one lower leaf spring 20 is heated. 22 is fixed to the spring fixing portion 10 b on the lower surface of the lens holding member 10. Similarly, the other lower leaf spring 20 is fixed to the spring fixing portion 10b by fitting the mounting hole 22a of the lower leaf spring 20 on the Y2 side to the protrusion 10d and heat caulking the protrusion 10d. *
図１と図２および図３に示すケース３は、磁性を有する鉄鋼板（普通鋼による鋼板）などで形成されて磁性ヨークとして機能している。ケース３は天井部３ａを有している。前記支持基台２には、中央部分に光透過穴２ｂが開口しているが、ケース３の天井部３ａにも開口部３ｂが開口している。支持基台２の光透過穴２ｂと、ケース３の開口部３ｂは、Ｚ１－Ｚ２方向に対向し、前記レンズ保持部材１０の中心穴１３ａに対しても上下から対向している。　 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 2 has a light transmission hole 2 b at the center, but an opening 3 b is also opened at the ceiling 3 a of the case 3. The light transmitting hole 2b of the support base 2 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. *
ケース３は平面形状が四角形状（矩形状）であり、外壁部として、４つの平面側板部３ｄと、それぞれの平面側板部３ｄどうしを連続させる角側板部３ｅとが設けられている。４つの平面側板部３ｄと４つの角側板部３ｅによって、外壁部は筒状に形成されている。天井部３ａに形成された開口部３ｂの平面形状は四角形状であり、開口部３ｂの内縁の４つの角部からは、それぞれＺ２方向に向けて折り曲げられた内壁部３ｃが一体に形成されている。内壁部３ｃは、それぞれの角側板部３ｅの内面に対してケース内側から対向し、対向ヨーク部として機能する。　 The case 3 has a quadrangular (rectangular) planar shape, and is provided with four planar side plate portions 3d as outer wall portions and a square side plate portion 3e that connects the respective planar side plate portions 3d. The outer wall portion is formed in a cylindrical shape by the four flat side plate portions 3d and the four square side plate portions 3e. The planar shape of the opening 3b formed in the ceiling 3a is a quadrangular shape, and an inner wall 3c bent in the Z2 direction is integrally formed from the four corners of the inner edge of the opening 3b. Yes. The inner wall portion 3c faces the inner surface of each square side plate portion 3e from the inside of the case and functions as a counter yoke portion. *
ケース３の天井部３ａは、光軸方向である上方から見た平面形状が矩形状であり、その４つの角部に第１貫通部４ａまたは第１貫通部４ｂが形成されている。第１貫通部４ａ，４ｂは、ケース３の内部に固定される磁石ＭにＺ１方向で対向する。第１貫通部４ａは、天井部３ａの３つの角部に形成されており、天井部３ａをＺ１－Ｚ２方向に貫通する円形（真円）の穴である。第１貫通部４ｂは、天井部３ａの１つの角部に形成されており、天井部３ａをＺ１－Ｚ２方向に貫通する長穴（または楕円穴）である。長穴の長手方向は、光軸Ｏを中心とした半径方向に向けられている。４つの第１貫通部は全てが円形の貫通穴であってもよいが、４つの第１貫通部のうちの少なくとも１つが長穴であることが好ましい。　 The ceiling portion 3a of the case 3 has a rectangular planar shape when viewed from above in the optical axis direction, and the first through portion 4a or the first through portion 4b is formed at four corners thereof. The first through portions 4a and 4b face the magnet M fixed inside the case 3 in the Z1 direction. The first penetration part 4a is formed at three corners of the ceiling part 3a, and is a circular (perfect circle) hole that penetrates the ceiling part 3a in the Z1-Z2 direction. The first penetrating portion 4b is formed at one corner of the ceiling portion 3a, and is a long hole (or elliptical hole) penetrating the ceiling portion 3a in the Z1-Z2 direction. The longitudinal direction of the elongated hole is directed in the radial direction with the optical axis O as the center. The four first through portions may all be circular through holes, but it is preferable that at least one of the four first through portions is a long hole. *
図２に示すように、ケース３の天井部３ａよりも上方（Ｚ１方向）に上部板ばね３０が設置される。上部板ばね３０は、ほぼ四角形の枠形状の固定側支持部３１と、その内側のリング形状の可動側支持部３２、および固定側支持部３１と可動側支持部３２とを４か所で繋ぐ弾性腕部３３とが、板ばね金属材料で一体に形成されている。固定側支持部３１の４箇所の角部が取付け部３１ａとなっており、それぞれの取付け部３１ａに第２貫通部３４ａまたは第２貫通部３４ｂが形成されている。２か所に設けられた第２貫通部３４ａは、取付け部３１ａをＺ１－Ｚ２方向に貫通する円形の穴である。他の２か所に設けられた第２貫通部３４ｂは、弾性腕部３３に向けて開放された切欠き部である。４か所の第２貫通部は、全てが貫通穴であってもよいし、全てが弾性腕部３３に向けて開放された切欠き部であってもよい。　 As shown in FIG. 2, 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 connects the substantially rectangular frame-shaped fixed-side support portion 31, the ring-shaped movable-side support portion 32 inside thereof, and the fixed-side support portion 31 and the movable-side support portion 32 at four locations. The elastic arm portion 33 is integrally formed of a leaf spring metal material. The four corners of the fixed-side support part 31 serve as attachment parts 31a, and the second penetration part 34a or the second penetration part 34b is formed in each attachment part 31a. The 2nd penetration part 34a provided in two places is a circular hole which penetrates attachment part 31a in the Z1-Z2 direction. The second penetrating portions 34 b provided at the other two locations are notches opened toward the elastic arm portion 33. All of the four second through portions may be through holes, or all may be cutout portions opened toward the elastic arm portion 33. *
図２に示すように、ケース３の天井部３ａの外面側で、さらに上部板ばね３０の上方（Ｚ１方向）に支持部材（ばね固定部材）６が設けられている。支持部材６は合成樹脂材料などの非磁性材料によって矩形状に形成されている。図７の断面図に示すように、支持部材６のＺ２方向に向く下面では、４つの角部に挟持部６ａが形成されている。図２に示すように、それぞれの挟持部６ａからＺ２方向に向けて突部７が一体に形成されている。支持部材６の中央部には光透過穴６ｂが開口している。光透過穴６ｂは、ケース３の天井部３ａに形成された開口部３ｂに対向している。図７に示すように、支持部材６の下面では、挟持部６ａと光透過穴６ｂとの間に、ケース３の天井部３ａから離れるＺ１方向に向けて窪んでいる窪み部６ｃが形成されている。　 As shown in FIG. 2, a support member (spring fixing member) 6 is provided on the outer surface side of the ceiling portion 3 a of the case 3 and further above the upper leaf spring 30 (Z1 direction). The support member 6 is formed in a rectangular shape by a nonmagnetic material such as a synthetic resin material. As shown in the cross-sectional view of FIG. 7, sandwiching portions 6 a are formed at four corners on the lower surface of the support member 6 facing the Z <b> 2 direction. As shown in FIG. 2, the protrusions 7 are integrally formed from the respective clamping portions 6a 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. As shown in FIG. 7, on the lower surface of the support member 6, a recessed portion 6 c is formed between the sandwiching portion 6 a and the light transmission hole 6 b and is recessed toward the Z <b> 1 direction away from the ceiling portion 3 a of the case 3. Yes. *
図７に示すように、ケース３の天井部３ａのＺ１側に向く外面に上部板ばね３０の固定側支持部３１（取付け部３１ａ）が設置され、さらにＺ１側に支持部材６が重ねられた状態で、図２に示されている支持部材６の４か所に設けられた突部７が、上部板ばね３０の固定側支持部３１の４か所の取付け部３１ａに形成された第２貫通部３４ａ，３４ｂに挿通され、さらにケース３の天井部３ａの４か所に形成された第１貫通部４ａ，４ｂに挿通される。そして、ケース３の天井部３ａの内側で、突部７のＺ２側に向く先端部が熱変形させられて、上部板ばね３０を挟んだ状態で、支持部材６とケース３の天井部３ａとが、熱かしめ固定される。　 As shown in FIG. 7, the fixed side support portion 31 (attachment portion 31 a) of the upper leaf spring 30 is installed on the outer surface facing the Z <b> 1 side of the ceiling portion 3 a of the case 3, and the support member 6 is further stacked on the Z <b> 1 side. In this state, the projections 7 provided at four locations of the support member 6 shown in FIG. 2 are formed at the four attachment portions 31 a of the fixed support portion 31 of the upper leaf spring 30. The penetrating portions 34a and 34b are inserted, and the first penetrating portions 4a and 4b formed at four locations on the ceiling 3a of the case 3 are further inserted. And 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. *
図２と図３に示すように、レンズ駆動装置１には４個の磁石Ｍが設けられている。４個の磁石Ｍはそれぞれ独立して形成されている。図３に示すように、それぞれの磁石Ｍは、光軸Ｏを中心とした半径方向の外側に向けられた外側着磁面となる外側面Ｍａと、光軸Ｏに向く着磁面Ｍｇを有している。内側着磁面である着磁面Ｍｇは、光軸Ｏを中心とする円筒面に沿う凹曲面形状である。それぞれの磁石Ｍは、着磁面Ｍｇと外側面Ｍａとが異なる極性となるように着磁されている。また、全ての磁石Ｍの着磁面Ｍｇは同じ極性となるように着磁されている。それぞれの磁石Ｍは、Ｚ１方向に向く平坦な上面Ｍｂを有している。　 As shown in FIGS. 2 and 3, the lens driving device 1 is provided with four magnets M. The four magnets M are formed independently. As shown in FIG. 3, each magnet M has an outer surface Ma that is an outer magnetized surface directed outward in the radial direction with the optical axis O as the center, and a magnetized surface Mg that faces the optical axis O. is doing. The magnetized surface Mg, which is the inner magnetized surface, has a concave curved surface shape along a cylindrical surface with the optical axis O as the center. 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. *
図７に示すように、４個の磁石Ｍは、それぞれ、ケース３の内部で、角側板部３ｅの内側に配置される。ケース３の角側板部３ｅおよび平面側板部３ｄの内面に流動性を有する接着剤が塗布された状態で、それぞれの磁石Ｍは、着磁面Ｍｇを光軸Ｏに向けた姿勢で、ケース３の各角部で９０度の角度で対向する平面側板部３ｄの内面に磁気吸着される。これにより、ケース３の内面とそれぞれの磁石Ｍとの間に接着剤が介在する。また、磁石Ｍの平坦な外側面Ｍａと、ケース３の角側板部３ｅの内面との間に隙間が形成されるため、この隙間に接着剤が充填されやすくなる。図７に示すように、それぞれの磁石Ｍは、Ｚ１方向に向く上面Ｍｂが、支持部材６に形成された突部７のＺ２側の先端部７ａに突き当てられて、ケース３の角側板部３ｅの内側で磁石ＭがＺ１方向（光軸Ｏ方向）に位置決めされる。　 As shown in FIG. 7, the four magnets M are respectively arranged inside the case 3 and inside the square side plate portion 3 e. 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. Thereby, an adhesive agent is interposed between the inner surface of the case 3 and each magnet M. Further, since a gap is formed between the flat outer surface Ma of the magnet M and the inner surface of the corner side plate portion 3e of the case 3, the gap is easily filled with an adhesive. As shown in FIG. 7, each magnet M has an upper surface Mb facing in the Z <b> 1 direction abutted against a Z <b> 2 side tip portion 7 a of the projection 7 formed on the support member 6, and the corner side plate portion of the case 3. The magnet M is positioned in the Z1 direction (optical axis O direction) inside 3e. *
レンズ駆動装置１の組立て時において、ケース３の角側板部３ｅおよび平面側板部３ｄの内面と磁石Ｍとの間に与えられた流動性を有する接着剤は、一部が支持部材６に形成された突部７と、ケース３の天井部３ａに形成された第１貫通部４ａ，４ｂとの隙間内に流れ込む。そして、天井部３ａのＺ１方向に向く外面と、上部板ばね３０の固定側支持部３１の取付け部３１ａとの間に、接着剤が毛細管現象で浸透する。そして、接着剤が熱硬化させられて、ケース３の内部でそれぞれの磁石Ｍが接着固定されるとともに、ケース３の天井部３ａの外面と、上部板ばね３０の取付け部３１ａとが接着固定される。ケース３と磁石Ｍとを固定する接着剤が、突部７と第１貫通部４ａ，４ｂとの間の隙間に連続し、さらに天井部３ａと上部板ばね３０との間にも浸透して、全てが一緒に固定されるため、接着剤を供給する工程を共通に行うことが可能になる。　 When the lens driving device 1 is assembled, a part of the fluid adhesive provided between the inner surfaces of the corner side plate portion 3e and the flat side plate portion 3d of the case 3 and the magnet M is formed on the support member 6. Flows into the gap between the protruding portion 7 and the first through portions 4 a and 4 b formed in the ceiling portion 3 a of the case 3. Then, the adhesive penetrates between the outer surface of the ceiling portion 3a facing the Z1 direction and the attachment portion 31a of the fixed side support portion 31 of the upper leaf spring 30 by a capillary phenomenon. Then, the adhesive is thermally cured, and the respective magnets M are bonded and fixed inside the case 3, and the outer surface of the ceiling portion 3a of the case 3 and the mounting portion 31a of the upper leaf spring 30 are bonded and fixed. The The adhesive that fixes the case 3 and the magnet M continues to the gap between the protrusion 7 and the first through portions 4a and 4b, and further penetrates between the ceiling portion 3a and the upper leaf spring 30. Since all are fixed together, it becomes possible to perform the process of supplying the adhesive in common. *
図７に示すように、支持部材６には、挟持部６ａと光透過穴６ｂとの間に窪み部６ｃが形成されており、上部板ばね３０の弾性腕部３３は、窪み部６ｃに対向する。そのため、弾性腕部３３が変形動作したときに、弾性腕部３３が支持部材６に当たるのを防止できる。　 As shown in FIG. 7, the support member 6 has a recess 6c formed between the clamping portion 6a and the light transmission hole 6b, and the elastic arm portion 33 of the upper leaf spring 30 faces the recess 6c. To do. Therefore, it is possible to prevent the elastic arm portion 33 from hitting the support member 6 when the elastic arm portion 33 is deformed. *
レンズ保持部材１０は非磁性の合成樹脂材料で形成されている。図３と図４および図８に示すように、レンズ保持部材１０の筒状部１３のＺ１方向に向く上面にばね固定部１０ａが設けられている。ケース３の内部に磁石Ｍが固定され、ケース３の天井部３ａの外側に上部板ばね３０と支持部材６が固定された後に、コイル４０が巻かれたレンズ保持部材１０と下部板ばね２０と支持基台２とが組み付けられた組立体が、ケース３の内部に下方から挿入される。図７に示すように、レンズ保持部材１０のばね固定部１０ａは、ケース３の天井部３ａに形成された開口部３ｂ内を通過して天井部３ａの外面よりも上方（Ｚ１方向）に突出する。そして、ばね固定部１０ａが上部板ばね３０の可動側支持部３２の下側に突き当てられ、ばね固定部１０ａと可動側支持部３２とが接着剤で固定される。また、支持基台２とケース３も互いに固定される。　 The lens holding member 10 is made of a nonmagnetic synthetic resin material. As shown in FIGS. 3, 4, and 8, a spring fixing portion 10 a is provided on the upper surface of the cylindrical portion 13 of the lens holding member 10 facing the Z <b> 1 direction. After the magnet M is fixed inside the case 3 and the upper leaf spring 30 and the support member 6 are fixed outside the ceiling portion 3a of the case 3, the lens holding member 10 and the lower leaf spring 20 around which the coil 40 is wound The assembly in which the support base 2 is assembled is inserted into the case 3 from below. As shown in FIG. 7, the spring fixing portion 10 a of the lens holding member 10 passes through the opening 3 b formed in the ceiling portion 3 a of the case 3 and protrudes upward (Z1 direction) from the outer surface of the ceiling portion 3 a. To do. And the spring fixing | fixed part 10a is abutted by the lower side of the movable side support part 32 of the upper leaf | plate spring 30, and the spring fixing | fixed part 10a and the movable side support part 32 are fixed with an adhesive agent. Further, the support base 2 and the case 3 are also fixed to each other. *
図２と図３に示すように、下部板ばね２０に設けられた弾性腕部２３は、細い湾曲形状すなわち蛇行形状に成形されており、上部板ばね３０に設けられた弾性腕部３３も、細い湾曲形状すなわち蛇行形状に成形されている。レンズ保持部材１０の下端と、支持基台２とが、下部板ばね２０を介して連結され、レンズ保持部材１０の筒状部１３の上端と、ケース３の天井部３ａとが上部板ばね３０を介して連結される。この支持構造により、下部板ばね２０の弾性腕部２３と上部板ばね３０の弾性腕部３３の双方の弾性変形によって、レンズ保持部材１０が、ケース３の内部で、光軸方向であるＺ１－Ｚ２方向へ移動自在に支持されることになる。すなわち、前記下部板ばね２０と前記上部板ばね３０で、レンズ保持部材１０を光軸方向へ移動自在に支持する弾性支持部材が構成されている。　 As shown in FIGS. 2 and 3, the elastic arm portion 23 provided on the lower leaf spring 20 is formed in a thin curved shape, that is, a meandering shape, and the elastic arm portion 33 provided on the upper leaf spring 30 is also It is formed into a thin curved shape, that is, a meandering shape. The lower end of the lens holding member 10 and the support base 2 are connected via a lower leaf spring 20, and the upper end of the cylindrical portion 13 of the lens holding member 10 and the ceiling portion 3 a of the case 3 are connected to the upper leaf spring 30. It is connected via. With this support structure, the lens holding member 10 is moved along the optical axis direction Z1- in the case 3 by elastic deformation of both the elastic arm portion 23 of the lower leaf spring 20 and the elastic arm portion 33 of the upper leaf spring 30. It is supported so as to be movable in the Z2 direction. That is, the lower plate spring 20 and the upper plate spring 30 constitute an elastic support member that supports the lens holding member 10 so as to be movable in the optical axis direction. *
図４と図８に示すように、レンズ保持部材１０の筒状部１３の外側部（外周部）には、Ｚ２側にフランジ部１１が形成され、Ｚ１側に複数の規制突部１２が形成されている。フランジ部１１は、レンズ保持部材１０において光軸方向の一端部であるＺ２側に偏った位置に形成されて、筒状部１３のＺ２側の端部に一体に形成されている。フランジ部１１は、光軸Ｏを中心とする周回方向（周方向）に沿って延びるように形成されている。フランジ部１１は、周回方向に連続して延びる鍔形状であってもよいし、周回方向に間欠的に形成されていてもよい。図４と図８に示すように、一実施形態のフランジ部１１では、Ｙ１側とＹ２側の双方に欠損部１１ｂが形成されている。　 As shown in FIGS. 4 and 8, 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. Has been. The flange portion 11 is formed at a position biased toward the Z2 side which is one end portion in the optical axis direction of the lens holding member 10, and is formed integrally with the end portion on the Z2 side of the cylindrical portion 13. The flange portion 11 is formed so as to extend along a circumferential direction (circumferential direction) around the optical axis O. The flange portion 11 may have a bowl shape extending continuously in the circumferential direction, or may be formed intermittently in the circumferential direction. As shown in FIGS. 4 and 8, in the flange portion 11 of one embodiment, a defect portion 11 b is formed on both the Y1 side and the Y2 side. *
規制突部１２は周回方向に間隔を空けて形成されている。フランジ部１１と複数の規制突部１２は、光軸方向（Ｚ１－Ｚ２方向）に対向している。レンズ保持部材１０の筒状部１３の外側部では、フランジ部１１と規制突部１２との間に、コイル巻き付け面１４が形成されている。規制突部１２が形成されていない部分では、レンズ保持部材１０（筒状部１３）の外側部に、コイル巻き付け面１４よりも光軸Ｏに向けて後退する逃げ外側面１５が形成されている。　 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). A coil winding surface 14 is formed between the flange portion 11 and the restriction projection 12 on the outer side of the cylindrical portion 13 of the lens holding member 10. In a portion where the restricting protrusion 12 is not formed, a flank outer surface 15 that recedes toward the optical axis O rather than the coil winding surface 14 is formed on the outer side of the lens holding member 10 (tubular portion 13). . *
図４と図８に示すように、フランジ部１１のＺ１方向に向く表面、すなわちコイル４０に対向する表面１１ａに成型痕１６が形成されている。この成型痕１６（または圧痕）は、後に説明する射出成型工程で、成型後のレンズ保持部材１０を金型から分離するときに使用されるイジェクトピンの先端部によって形成される。成型痕１６は、規制突部１２が形成されていない箇所において、逃げ外側面１５の外周側部分に対応したフランジ部１１に形成されている。　 As shown in FIGS. 4 and 8, a molding mark 16 is formed on the surface of the flange portion 11 facing the Z <b> 1 direction, that is, the surface 11 a facing the coil 40. This molding mark 16 (or indentation) is formed by the tip portion of an eject pin that is used when the lens holding member 10 after molding is separated from the mold in an injection molding process described later. The molding mark 16 is formed on the flange portion 11 corresponding to the outer peripheral side portion of the flank outer surface 15 at a place where the regulation protrusion 12 is not formed. *
成型痕１６はイジェクトピンの直径に対応する大きさで形成されるが、この成型痕１６をフランジ部１１に形成し、筒状部１３のＺ１側に向く先端部に形成しないことで、筒状部１３を過剰な肉厚に形成することを避けることができ、筒状部１３を最
適な肉厚寸法で形成できるようになる。その結果、中心穴１３ａの内径寸法を比較的大きくしても、筒状部１３の外形寸法を過剰に大きくする必要がなくなり、口径が大きなレンズを装備することができ、しかもレンズ駆動装置１を小型に構成できる。また、筒状部１３の肉厚寸法を適切に設定することで、筒状部１３を成形するときの樹脂材料の固化によるヒケの現象を抑制することができ、筒状部１３の寸法精度を高く維持することができる。　 The molding mark 16 is formed in a size corresponding to the diameter of the eject pin. However, the molding mark 16 is formed in the flange portion 11 and is not formed in the tip portion facing the Z1 side of the cylindrical portion 13, thereby forming a cylindrical shape. It is possible to avoid forming the portion 13 with an excessive thickness, and the cylindrical portion 13 can be formed with an optimal thickness. As a result, even if the inner diameter dimension of the center hole 13a is relatively large, it is not necessary to excessively increase the outer dimension of the cylindrical portion 13, and a lens having a large aperture can be provided. Can be configured small. In addition, by appropriately setting the wall thickness of the cylindrical portion 13, it is possible to suppress the phenomenon of sink due to the solidification of the resin material when the cylindrical portion 13 is molded, and to improve the dimensional accuracy of the cylindrical portion 13. Can be kept high.
図６の底面図に示すように、レンズ保持部材１０のＺ２方向に向く底面の２か所に、突起１９ａ，１９ｂが一体に形成されている。突起１９ａ，１９ｂはＺ２方向に向けて突出している。Ｙ１側に位置する突起１９ａは、コイル４０を形成する導線４１の巻き始端４１ａを固定する巻き付け突起であり、Ｙ２側に位置する突起１９ｂは、導線４１の巻き終端４１ｂを固定する巻き付け突起である。コイル４０を形成するための導線４１は被覆導線であり、導電性の金属線である銅線と、銅線を被覆する絶縁性の被覆層とを有している。被覆層は銅線を被覆するポリウレタン樹脂などの絶縁層と、その表面のポリアミド樹脂などの融着層の二層構造である。　 As shown in the bottom view of FIG. 6, 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 that fixes the winding start end 41a of the conducting wire 41 forming the coil 40, and the protrusion 19b located on the Y2 side is a winding projection that fixes the winding end 41b of the conducting wire 41. . The conducting wire 41 for forming the coil 40 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. *
導線４１の巻き始端４１ａで被覆層が除去されて、巻き始端４１ａが、図６に示すＹ１側の突起１９ａに巻き付けられる。突起１９ａから延びる導線４１は、フランジ部１１のＹ１側の欠損部１１ｂを通過して、フランジ部１１の上に導かれ、フランジ部１１と規制突部１２との間で、導線４１がコイル巻き付け面１４に複数ターン巻き付けられる。導線４１の巻き付け工程で、熱風が与えられるなどして導線４１が加熱され、融着層の溶融によって絶縁層どうしが融着接合されてコイル４０が形成される。コイル４０を巻き終わった導線４１は、フランジ部１１のＹ２側の欠損部１１ｂを通過させてレンズ保持部材１０の下面側へ引き出される。導線４１の巻き終端４１ｂは、被覆層が除去されて、図６に示すＹ２側のレンズ保持部材１０の突起１９ｂに巻き付けられる。　 The coating layer is removed at the winding start end 41a of the conducting wire 41, and the winding start end 41a is wound around the protrusion 19a on the Y1 side shown in FIG. The conducting wire 41 extending from the protrusion 19a passes through the missing portion 11b on the Y1 side of the flange portion 11 and is guided onto the flange portion 11, and the conducting wire 41 is coiled between the flange portion 11 and the restricting projection portion 12. A plurality of turns are wound around the surface 14. In the winding process of the conductive wire 41, the conductive wire 41 is heated by applying hot air or the like, and the insulating layer is fusion-bonded by melting of the fusion layer to form the coil 40. The conductive wire 41 that has finished winding the coil 40 passes through the missing portion 11b on the Y2 side of the flange portion 11 and is drawn to the lower surface side of the lens holding member 10. The winding end 41b of the conducting wire 41 is wound around the protrusion 19b of the lens holding member 10 on the Y2 side shown in FIG. *
図６に示すように、レンズ保持部材１０のＺ２方向に向く下面のばね固定部１０ｂ，１０ｂに形成された突起１０ｃ，１０ｄが、下部板ばね２０の可動側支持部２２に形成された対応する取付け穴２２ａに挿通され、突起１０ｃ，１０ｄの先端部が熱かしめされて固定される。Ｙ１側の突起１９ａに巻かれている導線４１の巻き始端４１ａは、Ｙ１側の下部板ばね２０の可動側支持部２２とほぼ接触する状態となり、巻き始端４１ａと可動側支持部２２とが半田付けされる。Ｙ２側の突起１９ｂに巻かれている導線４１の巻き終端４１ｂと、Ｙ２側の下部板ばね２０の可動側支持部２２も互いに接触した状態となって半田付けされる。その結果、一方の下部板ばね２０が導線４１の巻き始端４１ａに導通し、他方の下部板ばね２０が巻き終端４１ｂに導通される。　 As shown in FIG. 6, the protrusions 10 c and 10 d formed on the spring fixing portions 10 b and 10 b on the lower surface of the lens holding member 10 facing the Z <b> 2 direction correspond to the corresponding formed on the movable side support portion 22 of the lower leaf spring 20. It is inserted through the mounting hole 22a, and the tips of the projections 10c, 10d are fixed by heat caulking. The winding start end 41a of the conducting wire 41 wound around the Y1 side protrusion 19a is in a state of being substantially in contact with the movable side support portion 22 of the lower leaf spring 20 on the Y1 side, and the winding start end 41a and the movable side support portion 22 are soldered. Attached. The winding end 41b of the conductive wire 41 wound around the Y2 side protrusion 19b and the movable side support portion 22 of the Y2 side lower leaf spring 20 are also in contact with each other and soldered. As a result, one lower leaf spring 20 is conducted to the winding start end 41a of the conducting wire 41, and the other lower leaf spring 20 is conducted to the winding end 41b. *
図２と図３に示すように、レンズ保持部材１０のコイル巻き付け面１４に導線４１が巻かれてコイル４０が形成されると、規制突部１２が存在していない部分で、レンズ保持部材１０の逃げ外側面１５と、コイル４０との間に隙間（ｉ）が形成される。隙間（ｉ）は、レンズ保持部材１０（筒状部１３）の外側部の４か所に形成される。図７に示すように、レンズ保持部材１０がケース３の内部に収納されて、レンズ保持部材１０の上端部と上部板ばね３０の可動側支持部３２とが固定されると、ケース３の開口部３ｂの周囲の４か所から下向きに折り曲げられた内壁部３ｃが、前記隙間（ｉ）の内部に入り込む。よって、コイル４０の外側に磁石Ｍの着磁面Ｍｇが対向し、コイル４０の内側に対向ヨーク部である内壁部３ｃが対向する。また、天井部３ａからＺ２側（フランジ部１１側）に突出した内壁部３ｃは、板状部（内面部）がレンズ保持部材１０の筒状部１３の外周面である逃げ外側面１５に対向するとともに、内壁部３ｃの先端部３ｆがフランジ部１１に対向する。　 As shown in FIGS. 2 and 3, when the coil 40 is formed by winding the conductive wire 41 around the coil winding surface 14 of the lens holding member 10, the lens holding member 10 is a portion where the restricting protrusion 12 does not exist. A clearance (i) is formed between the flank outer surface 15 and the coil 40. The gap (i) is formed at four locations on the outer side of the lens holding member 10 (tubular portion 13). As shown in FIG. 7, when the lens holding member 10 is housed in the case 3 and the upper end portion of the lens holding member 10 and the movable side support portion 32 of the upper leaf spring 30 are fixed, the opening of the case 3 is opened. The inner wall 3c bent downward from four locations around the portion 3b enters the gap (i). Therefore, the magnetized surface Mg of the magnet M faces the outside of the coil 40, and the inner wall portion 3 c that is a facing yoke portion faces the inside of the coil 40. Further, the inner wall portion 3 c protruding from the ceiling portion 3 a to the Z2 side (flange portion 11 side) is opposed to the flank outer surface 15 whose plate-like portion (inner surface portion) is the outer peripheral surface of the cylindrical portion 13 of the lens holding member 10. In addition, the front end 3f of the inner wall 3c faces the flange 11. *
さらに、レンズ保持部材１０の外側部にコイル４０が形成された状態において、レンズ保持部材１０のフランジ部１１に形成された成型痕１６の少なくとも一部が、逃げ外側面１５とコイル４０との前記隙間（ｉ）に対向し、且つケース３の内壁部３ｃの先端部３ｆに対向する。　 Further, in a state where the coil 40 is formed on the outer side portion of the lens holding member 10, at least a part of the molding mark 16 formed on the flange portion 11 of the lens holding member 10 causes the escape outer surface 15 and the coil 40 to be It faces the gap (i) and faces the tip 3f of the inner wall 3c of the case 3. *
図３に示す支持基台２の内部には、３つに分割された金属板が埋設されており、そのうちの２つの金属板のそれぞれの一部が接続端子４５として支持基台２の側方から下向きに突出している。支持基台２の上面に、接続端子４５を形成する金属板の一部が露出した露出部が設けられており、この露出部と下部板ばね２０の固定側支持部２１とが半田付けまたは溶接されて導通させられ、２つの接続端子４５が、２つの下部板ばね２０に、１対１で導通させられている。よって、２つの接続端子４５から、それぞれの下部板ばね２０を介して、コイル４０に駆動電流を通電可能となる。　 A metal plate divided into three parts is embedded in the support base 2 shown in FIG. 3, and a part of each of the two metal plates serves as a connection terminal 45 on the side of the support base 2. Protrudes downward from An exposed portion where a part of the metal plate forming the connection terminal 45 is exposed is provided on the upper surface of the support base 2, and this exposed portion and the fixed-side support portion 21 of the lower leaf spring 20 are soldered or welded. The two connection terminals 45 are electrically connected to the two lower leaf springs 20 on a one-to-one basis. Therefore, the drive current can be supplied to the coil 40 from the two connection terminals 45 via the lower leaf springs 20. *
なお、支持基台２に埋設されている、３つに分割された金属板のうちの前記接続端子４５を構成していない１つの金属板は、支持基台２の内部でＸ１側およびＹ１側とＹ２側の側辺に沿うようにＵ字形状に形成されて埋設されている。この金属板の一部は、図１ないし図３などに示すように、支持基台２の角部に接地用端子４６として外方に突出している。図７に示すように、支持基台２とケース３とが組み合わされると、接地用端子４６がケース３に接合されて、ケース３が接地電位に設定される。　 Of the three divided metal plates embedded in the support base 2, one metal plate that does not constitute the connection terminal 45 is the X1 side and the Y1 side inside the support base 2. And embedded in a U shape so as to extend along the side of the Y2 side. A part of this metal plate protrudes outward as a grounding terminal 46 at the corner of the support base 2 as shown in FIGS. As shown in FIG. 7, when the support base 2 and the case 3 are combined, the ground terminal 46 is joined to the case 3, and the case 3 is set to the ground potential. *
次に、レンズ駆動装置１の製造方法を説明する。　 Next, a method for manufacturing the lens driving device 1 will be described. *
図９に、レンズ保持部材１０を射出成型する成型方法が示されている。射出成型に使用する金型５０は、例えば、筒状部１３とフランジ部１１を形成するためにＺ１－Ｚ２方向に分離可能に組み合わされる第１金型５１および第２金型５２と、中心穴１３ａを形成するための第３金型（入子）５３と、さらに規制突部１２とコイル巻き付け面１４を形成するための図示しない第４金型（入子）などで構成されている。個々の金型の形状および組み合わせは、レンズ保持部材１０の形状に応じて適宜設計される。また、筒状部１３の中心穴１３ａの内周面に雌ねじ部が形成されている場合には、第３金型（入子）５３の外周面に雄ねじ部が形成されるとともに、第３金型５３は、回転しながらＺ１－Ｚ２方向に移動可能な構成とする。なお、規制突部１２と対向する部分におけるフランジ部１１は、第２金型５２と第４金型（入子）とによって形成される。第１金型５１には、イジェクトピン５４がＺ１－Ｚ２方向へ摺動自在に装備されている。　 FIG. 9 shows a molding method for injection molding the lens holding member 10. A mold 50 used for injection molding includes, for example, a first mold 51 and a second mold 52 that are separably combined in the Z1-Z2 direction to form the cylindrical portion 13 and the flange portion 11, and a center hole. A third mold (nesting) 53 for forming 13a and a fourth mold (nesting) (not shown) for forming the regulation protrusion 12 and the coil winding surface 14 are formed. The shape and combination of individual molds are appropriately designed according to the shape of the lens holding member 10. Further, when the internal thread portion is formed on the inner peripheral surface of the center hole 13 a of the cylindrical portion 13, the external thread portion is formed on the outer peripheral surface of the third mold (nesting) 53 and the third metal mold is formed. The mold 53 is configured to be movable in the Z1-Z2 direction while rotating. In addition, the flange part 11 in the part which opposes the control protrusion 12 is formed of the 2nd metal mold | die 52 and a 4th metal mold | die (nesting). The first mold 51 is equipped with an eject pin 54 slidable in the Z1-Z2 direction. *
射出成型工程では、金型５０のキャビティ内に溶融された合成樹脂材料が射出された後に、金型を冷却することでレンズ保持部材１０が成型される。その後、それぞれの金型を分離し、イジェクトピン５４によって成形後のレンズ保持部材１０がＺ２方向へ押されて、レンズ保持部材１０が第１金型５１から分離される。フランジ部１１のＺ１側に向く表面１１ａには、イジェクトピン５４の先端部の形状に倣う成型痕１６または圧痕が形成される。また、キャビティに注入された溶融樹脂が、第１金型５１とイジェクトピン５４との隙間に入り込むことがあり、成型痕１６の周囲に小さなバリ１６ａが残ることがある。　 In the injection molding step, after the molten synthetic resin material is injected into the cavity of the mold 50, the lens holding member 10 is molded by cooling the mold. Thereafter, the respective molds are separated, and the molded lens holding member 10 is pushed in the Z2 direction by the eject pin 54, so that the lens holding member 10 is separated from the first mold 51. On the surface 11a facing the Z1 side of the flange portion 11, a molding mark 16 or an indentation that follows the shape of the tip portion of the eject pin 54 is formed. Moreover, the molten resin injected into the cavity may enter the gap between the first mold 51 and the eject pin 54, and a small burr 16 a may remain around the molding mark 16. *
成形後のレンズ保持部材１０を、フランジ部１１の表面１１ａの複数箇所において、イジェクトピン５４で押すことで、レンズ保持部材１０に対して、第１金型５１から分離するための力Ｆをバランスよく与えることができる。また、イジェクトピン５４でフランジ部１１を押すようにし、筒状部１３のＺ１側の先端部がイジェクトピン５４で押されることがないため、筒状部１３の肉厚を薄く、最適な寸法に成型することができる。　 By pressing the molded lens holding member 10 with the eject pin 54 at a plurality of locations on the surface 11a of the flange portion 11, the force F for separating the lens holding member 10 from the first mold 51 is balanced. Can give well. Further, since the flange portion 11 is pushed by the eject pin 54 and the tip end portion on the Z1 side of the tubular portion 13 is not pushed by the eject pin 54, the thickness of the tubular portion 13 is reduced to an optimum dimension. Can be molded. *
レンズ駆動装置１の組立工程では、支持部材６と上部板ばね３０とケース３を順に重ね、支持部材６の挟持部６ａからＺ２方向へ突出する突部７を、上部板ばね３０に形成された第２貫通部３４ａ，３４ｂに挿通させ、天井部３ａに形成された第１貫通部４ａ，４ｂに挿通させる。ケース３の内部で、加熱した治具をそれぞれの突部７のＺ２方向に向く先端部に当て、突部７の先端部を加熱してかしめ変形部を形成し、支持部材６と上部板ばね３０およびケース３の天井部３ａを、熱かしめ固定する。かしめ変形部を形成する際に、支持部材６のＺ１方向に向く外面から突部７のＺ２方向に向く先端部までの高さ寸法を調節することで、後に組み込まれる磁石Ｍのケース３内での高さ位置を高精度に設定できるようになる。　 In the assembly process of the lens driving device 1, the support member 6, the upper leaf spring 30, and the case 3 are sequentially stacked, and the protrusion 7 that protrudes in the Z <b> 2 direction from the clamping portion 6 a of the support member 6 is formed on the upper leaf spring 30. The second through portions 34a and 34b are inserted, and the first through portions 4a and 4b formed in the ceiling portion 3a are inserted. Inside the case 3, a heated jig is applied to the tip portions of the protrusions 7 facing in the Z2 direction, and the tip portions of the protrusions 7 are heated to form a caulking deformed portion. The support member 6 and the upper leaf spring 30 and the ceiling 3a of the case 3 are fixed by heat caulking. When forming the caulking deformed portion, the height dimension from the outer surface facing the Z1 direction of the support member 6 to the tip end portion facing the Z2 direction of the protrusion 7 is adjusted, so that the inside of the case 3 of the magnet M to be incorporated later is adjusted. The height position of can be set with high accuracy. *
磁石Ｍの組み込み工程では、Ｚ１方向（天井部３ａ）が重力方向となるように配置したケース３の内面と磁石Ｍとの間に流動性を有する熱硬化性の接着剤を介在させる。ケース３の内面に接着剤を塗布してから磁石Ｍをケース３の内面に磁気吸着させ、それぞれの磁石Ｍをケース３の内面に沿ってＺ１方向へ摺動させ、磁石ＭのＺ１方向に向く上面Ｍｂを、突部７のＺ２側に向く先端部に突き当てて、それぞれの磁石Ｍを位置決めする。このとき、接着剤は、重力の力と、さらに磁石ＭをＺ１方向へ押す力によって、その一部が、第１貫通部４ａ，４ｂと、支持部材６から延びる突部７の外周面との隙間に浸入し、さらに、天井部３ａの外面と上部板ばね３０の取付け部３１ａとの間に毛細管現象で浸透する。その後の加熱工程で、熱硬化性の接着剤を硬化させることで、ケース３と磁石Ｍとが接着固定されるとともに、ケース３の天井部３ａと上部板ばね３０の取付け部３１ａとが接着固定され、上部板ばね３０の取付け部３１ａと支持部材６も接着固定される。　 In the step of incorporating the magnet M, a thermosetting adhesive having fluidity is interposed between the inner surface of the case 3 and the magnet M arranged so that the Z1 direction (ceiling portion 3a) is the direction of gravity. After the adhesive is applied to the inner surface of the case 3, the magnets M are magnetically attracted to the inner surface of the case 3, and the respective magnets M are slid along the inner surface of the case 3 in the Z <b> 1 direction. The upper surface Mb is abutted against the tip of the protrusion 7 facing the Z2 side, and each magnet M is positioned. At this time, the adhesive is partly formed between the first through portions 4a and 4b and the outer peripheral surface of the protrusion 7 extending from the support member 6 by the force of gravity and the force of pressing the magnet M in the Z1 direction. It penetrates into the gap and further permeates by capillarity between the outer surface of the ceiling portion 3a and the attachment portion 31a of the upper leaf spring 30. In the subsequent heating process, the case 3 and the magnet M are bonded and fixed by curing the thermosetting adhesive, and the ceiling portion 3a of the case 3 and the mounting portion 31a of the upper leaf spring 30 are bonded and fixed. Then, the attachment portion 31a of the upper leaf spring 30 and the support member 6 are also bonded and fixed. *
ケース３に上部板ばね３０と支持部材６および磁石Ｍが固定された後に、ケース３の内部にレンズ保持部材１０を組み込む。図２に示すように、周囲にコイル４０が巻かれたレンズ保持部材１０は、支持基台２上に下部板ばね２０を介して固定しておく。支持基台２と下部板ばね２０とレンズ保持部材１０およびコイル４０が組み立てられた組立体を、ケース３の内部に挿入し、レンズ保持部材１０のＺ１側の上部に形成されたばね固定部１０ａを、上部板ばね３０の可動側支持部３２に接着剤で固定する。また、支持基台２とケース３も接着剤あるいは溶接によって固定する。　 After the upper leaf spring 30, the support member 6, and the magnet M are fixed to the case 3, the lens holding member 10 is incorporated into the case 3. As shown in FIG. 2, the lens holding member 10 around which the coil 40 is wound is fixed on the support base 2 via the lower leaf spring 20. An assembly in which the support base 2, the lower leaf spring 20, the lens holding member 10 and the coil 40 are assembled is inserted into the case 3, and a spring fixing portion 10 a formed at the upper part of the lens holding member 10 on the Z1 side is inserted. The upper plate spring 30 is fixed to the movable side support portion 32 with an adhesive. The support base 2 and the case 3 are also fixed by an adhesive or welding. *
次に、上記構造のレンズ駆動装置１およびこれを使用したカメラモジュール１００の動作を説明する。　 Next, the operation of the lens driving device 1 having the above structure and the camera module 100 using the same will be described. *
図７に示すように、コイル４０に駆動電流が与えられていないときは、弾性支持部材である下部板ばね２０と上部板ばね３０で支持されているレンズ保持部材１０がＺ２方向へ移動した位置で安定している。このとき、レンズ保持部材１０の下面側の一部と支持基台２の一部とが当接している。また、フランジ部１１のＺ１方向に向く表面１１ａは、ケース３の内壁部３ｃのＺ２方向に向く先端部３ｆから距離Ｈだけ離れて対向している。支持基台２から突出する接続端子４５，４５に駆動電流が与えられると、駆動電流は、一対の下部板ばね２０，２０を介して、導線４１の巻き始端４１ａと巻き終端４１ｂとの間を流れる。コイル４０に流れる電流と、磁石Ｍから発生する磁界とによる電磁力で、レンズ保持部材１０が光軸方向（Ｚ１方向）へ駆動される。このレンズ保持部材１０の動作によって、レンズ保持部材１０に保持されたレンズ体１０３で撮像素子１０１に結像される像の焦点が合わせられる。　 As shown in FIG. 7, when no driving current is applied to the coil 40, the lens holding member 10 supported by the lower leaf spring 20 and the upper leaf spring 30 which are elastic supporting members is moved in the Z2 direction. And stable. At this time, a part of the lower surface side of the lens holding member 10 and a part of the support base 2 are in contact with each other. Further, the surface 11a facing the Z1 direction of the flange portion 11 is opposed to the tip portion 3f of the inner wall portion 3c of the case 3 facing the Z2 direction by a distance H. When a drive current is applied to the connection terminals 45 and 45 protruding from the support base 2, the drive current passes between the winding start end 41 a and the winding end 41 b of the conducting wire 41 via the pair of lower leaf springs 20 and 20. Flowing. The lens holding member 10 is driven in the optical axis direction (Z1 direction) by an electromagnetic force generated by a current flowing through the coil 40 and a magnetic field generated from the magnet M. By the operation of the lens holding member 10, the image formed on the image sensor 101 is focused by the lens body 103 held by the lens holding member 10. *
図７に示す構造のレンズ駆動装置１において、コイル４０に与えられる駆動電流に重畳するノイズなどの影響で、レンズ保持部材１０がＺ１方向へ大きく移動し、あるいは、落下等にともなう強い外部衝撃の加速度で、レンズ保持部材１０がＺ１方向へ大きく移動すると、フランジ部１１の表面１１ａが、内壁部３ｃの先端部３ｆに当たる。内壁部３ｃの先端部３ｆをストッパ部として機能させることで、レンズ保持部材１０がＺ１方向へ過剰に動くのを規制し、弾性支持部材である下部板ばね２０と上部板ばね３０が必要以上に変形するのを規制できる。　 In the lens driving device 1 having the structure shown in FIG. 7, the lens holding member 10 moves greatly in the Z1 direction due to noise or the like superimposed on the driving current applied to the coil 40, or a strong external impact due to dropping or the like occurs. When the lens holding member 10 is largely moved in the Z1 direction by acceleration, the surface 11a of the flange portion 11 hits the tip portion 3f of the inner wall portion 3c. By causing the tip 3f of the inner wall 3c to function as a stopper, the lens holding member 10 is prevented from excessively moving in the Z1 direction, and the lower leaf spring 20 and the upper leaf spring 30 that are elastic support members are more than necessary. The deformation can be restricted. *
レンズ保持部材１０のフランジ部１１の表面１１ａでは、逃げ外側面１５の外側に、イジェクトピン５４による成型痕１６（または圧痕）が形成されている。レンズ保持部材１０の小型化のためにはフランジ部１
１の外方への突出幅寸法は小さいことが好ましく、さらに、イジェクトピン５４とフランジ部１１との当接面積はなるべく大きいことが好ましい。この条件を満足させると、フランジ部１１の幅寸法に対して成型痕１６の直径が大きくなり、成型痕１６の一部が、ケース３の内壁部３ｃの先端部３ｆに対向することになる。　 On the surface 11 a of the flange portion 11 of the lens holding member 10, a molding mark 16 (or an impression) by the eject pin 54 is formed on the outer side of the flank outer surface 15. In order to reduce the size of the lens holding member 10, the flange portion 1 is used.
The outward projecting width dimension of 1 is preferably small, and the contact area between the eject pin 54 and the flange portion 11 is preferably as large as possible. When this condition is satisfied, the diameter of the molding mark 16 increases with respect to the width dimension of the flange portion 11, and a part of the molding mark 16 faces the front end portion 3 f of the inner wall portion 3 c of the case 3.
したがって、レンズ保持部材１０がＺ１方向へ大きく移動すると、成型痕１６が内壁部３ｃの先端部３ｆに当たることになるが、このとき、図９に示すように、成型痕１６の周囲にバリ１６ａが形成されていると、先端部３ｆとの当接でバリ１６ａが剥がれてケース３内の可動部内に落下するおそれがある。　 Therefore, when the lens holding member 10 moves greatly in the Z1 direction, the molding mark 16 hits the tip 3f of the inner wall 3c. At this time, as shown in FIG. If formed, the burr 16a may be peeled off due to contact with the tip 3f and fall into the movable part in the case 3. *
そこで、一実施形態のレンズ駆動装置１では、図８などに示すように、ケース３の内壁部３ｃの先端部３ｆにフランジ部１１から離れる方向へ窪む凹部３ｇが形成されている。レンズ保持部材１０のフランジ部１１が先端部３ｆに当たることがあっても、凹部３ｇが成型痕１６に離間して対向することで、先端部３ｆが成型痕１６に直接に当たらなくなる。そのため、フランジ部１１の表面１１ａからバリ１６ａが分離されるのを防止することができる。図８に示すように、内壁部３ｃの先端部３ｆでは、凹部３ｇが内壁部３ｃの幅寸法Ｗの中央部に形成されているため、レンズ保持部材１０がＺ１方向へ大きく移動したときに、凹部３ｇの両側に位置する先端部３ｆが、フランジ部１１の成型痕１６を挟んだ両側に当接することになり、フランジ部１１の表面１１ａと先端部３ｆとが安定して当接し、先端部３ｆがストッパ部として機能できるようになる。言うまでもないが、凹部３ｇの幅寸法は、凹部３ｇが対向する部分における成型痕１６の幅寸法よりも大きく形成されている。　 Therefore, in the lens driving device 1 according to the embodiment, as shown in FIG. 8 and the like, a concave portion 3g that is recessed in a direction away from the flange portion 11 is formed in the distal end portion 3f of the inner wall portion 3c of the case 3. Even if the flange portion 11 of the lens holding member 10 hits the tip portion 3f, the tip portion 3f does not directly hit the molding mark 16 because the concave portion 3g faces the molding mark 16 apart. Therefore, it is possible to prevent the burr 16a from being separated from the surface 11a of the flange portion 11. As shown in FIG. 8, at the tip 3f of the inner wall 3c, since the recess 3g is formed at the center of the width dimension W of the inner wall 3c, when the lens holding member 10 moves greatly in the Z1 direction, The front end portions 3f located on both sides of the concave portion 3g come into contact with both sides of the flange portion 11 with the molding mark 16 interposed therebetween, and the surface 11a of the flange portion 11 and the front end portion 3f stably come into contact with each other. 3f can function as a stopper portion. Needless to say, the width dimension of the recess 3g is formed to be larger than the width dimension of the molding mark 16 in the portion facing the recess 3g. *
なお、前記一実施形態では、フランジ部１１に形成される成型痕１６の数を４つとしたが、それ以外の個数でも構わない。また、成型痕１６の形状も円形に限定されず、楕円形状や他の形状であっても構わない。　 In the above-described embodiment, the number of molding marks 16 formed on the flange portion 11 is four, but other numbers may be used. Further, the shape of the molding mark 16 is not limited to a circle, and may be an elliptical shape or other shapes. *
なお、前記一実施形態では、図６に示すように、コイル４０を構成する導線４１の巻き始端４１ａと巻き終端４１ｂが、レンズ保持部材１０の下面の突起１９ａ，１９ｂに巻き付けられ、この巻き付けられた部分とそれぞれの下部板ばね２０とが半田付けされて導通されている。ただし、本発明の他の実施形態では、コイル４０から延びる導線４１の巻き始端４１ａと巻き終端４１ｂとが、直接にそれぞれの下部板ばね２０に半田付けされて接続されている構造であってもよい。　 In the embodiment, as shown in FIG. 6, the winding start end 41 a and the winding end 41 b of the conducting wire 41 constituting the coil 40 are wound around the protrusions 19 a and 19 b on the lower surface of the lens holding member 10. And the respective lower leaf springs 20 are soldered and conducted. However, in another embodiment of the present invention, even if the winding start end 41a and the winding end 41b of the conducting wire 41 extending from the coil 40 are directly soldered and connected to the respective lower leaf springs 20, Good. *
また、前記一実施形態においては、レンズ保持部材であるレンズ保持部材１０を光軸方向のみに駆動して自動焦点合わせを行うレンズ駆動装置について説明したが、本発明はこれに限られない。例えば、自動焦点合わせを行う可動ユニットを光軸方向と交差方向へ駆動していわゆる手振れ補正を行うことが可能なレンズ駆動装置に本発明を適用することができる。この場合には、一般的に、上部板ばねが２つに分割されており、コイル４０の導線４１の巻き始端４１ａと巻き終端４１ｂとが、それぞれの上部板ばねに半田や導電性接着剤で接合される。 In the above-described embodiment, the lens driving device that performs the automatic focusing by driving the lens holding member 10 that is a lens holding member only in the optical axis direction has been described, but the present invention is not limited thereto. For example, the present invention can be applied to a lens driving device that can perform so-called camera shake correction by driving a movable unit that performs automatic focusing in a direction crossing the optical axis direction. In this case, generally, the upper leaf spring is divided into two, and the winding start end 41a and winding end 41b of the conductive wire 41 of the coil 40 are connected to each upper leaf spring with solder or conductive adhesive. Be joined.
　本発明について上記実施形態を参照しつつ説明したが、本発明は上記実施形態に限定されるものではなく、改良の目的または本発明の思想の範囲内において改良または変更が可能である。 Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and can be improved or changed within the scope of the purpose of the improvement or the idea of the present invention.
本発明の一実施形態のレンズ駆動装置およびその製造方法では、レンズ保持部材を射出成型する際に、筒状部の外側部においてコイルに対向する位置に形成されるフランジ部の表面にイジェクトピンを当てて成形後のレンズ保持部材を金型から離脱させている。イジェクトピンを、レンズ体を保持する筒状部の先端部ではなくフランジ部に当てることで、筒状部の肉厚を薄く形成することができる。その結果、筒状部の内径寸法を大きくでき、さらにはレンズ保持部材の外形寸法が過大になるのを防止できる。また、筒状部の肉厚を必要以上に大きくする必要がないため、筒状部を成形する樹脂の固化時のヒケの影響を少なくでき、筒状部の寸法精度を高く維持しやすくなる。　 In the lens driving device and the manufacturing method thereof according to one embodiment of the present invention, when the lens holding member is injection-molded, the eject pin is provided on the surface of the flange portion formed at the position facing the coil in the outer portion of the cylindrical portion. The lens holding member after molding is detached from the mold. The thickness of the cylindrical portion can be reduced by applying the eject pin to the flange portion instead of the tip portion of the cylindrical portion that holds the lens body. As a result, the inner diameter dimension of the cylindrical portion can be increased, and further, the outer dimension of the lens holding member can be prevented from becoming excessive. Further, since it is not necessary to increase the thickness of the cylindrical portion more than necessary, the influence of sink marks when the resin forming the cylindrical portion is solidified can be reduced, and the dimensional accuracy of the cylindrical portion can be easily maintained at a high level. *
また、ケースに対向ヨーク部などとして機能する内壁部を形成したときに、この内壁部の前記フランジ部に対向する先端部に、イジェクトピンの成型痕に対向する凹部を形成することで、先端部が成型痕に直接当たるのを防止できる。その結果、万が一成型痕にバリが有ったときに、このバリが装置内に脱落することなどを防止できるようになる。 In addition, when an inner wall portion that functions as an opposing yoke portion or the like is formed in the case, a tip portion is formed on the tip portion of the inner wall portion that faces the flange portion so as to face the molding mark of the eject pin. Can be prevented from directly hitting the molding marks. As a result, in the unlikely event that there is a burr on the molding mark, this burr can be prevented from falling into the apparatus.
　以上のように、本発明の一実施形態に係るレンズ駆動装置、前記レンズ駆動装置を使用したカメラモジュールおよびレンズ駆動装置の製造方法では、レンズ保持部材の筒状部の肉厚を必要以上に大きくすることなく、内径寸法などの寸法精度を高くして成型することができる点で有用である。 As described above, in the lens driving device according to one embodiment of the present invention, the camera module using the lens driving device, and the manufacturing method of the lens driving device, the thickness of the cylindrical portion of the lens holding member is increased more than necessary. Therefore, it is useful in that it can be molded with high dimensional accuracy such as inner diameter.
　本出願は、２０１７年３月２４日に日本国特許庁に出願された特願２０１７－０５８７４８に基づくものであり、その出願を優先権主張するものであり、その出願の全ての内容を参照することにより包含するものである。 This application is based on Japanese Patent Application No. 2017-058748 filed with the Japan Patent Office on March 24, 2017, claims priority, and refers to the entire contents of the application. It is included.
１　  レンズ駆動装置２　  支持基台３　  ケース３ａ　天井部３ｂ　開口部３ｃ　内壁部３ｆ　先端部３ｇ　凹部４ａ，４ｂ　第１貫通部６　  支持部材６ａ　挟持部６ｃ　窪み部７　  突部１０　レンズ保持部材１０ａ，１０ｂ　ばね固定部１１　フランジ部１２　規制突部１３　筒状部１４　コイル巻き付け面２０　下部板ばね３０　上部板ばね３１　固定側支持部３２　可動側支持部３３　弾性腕部３４ａ，３４ｂ　第２貫通部３５　連結部４０　コイル４１　導線１００　カメラモジュール１０１　撮像素子１０２　プリント基板１０３　レンズ体Ｍ　  磁石Ｍｇ　着磁面Ｏ　  光軸 DESCRIPTION OF SYMBOLS 1 lens drive device 2 support base 3 case 3a ceiling part 3b opening 3c inner wall part 3f tip part 3g recessed part 4a, 4b first penetration part 6 heel support member 6a clamping part 6c depression part 7 saddle protrusion 10 lens holding member 10a, 10b Spring fixing part 11 Flange part 12 Restriction protrusion 13 Cylindrical part 14 Coil winding surface 20 Lower leaf spring 30 Upper leaf spring 31 Fixed side support part 32 Movable side support part 33 Elastic arm parts 34a, 34b Second penetration part 35 Connection part 40 Coil 41 Conductor 100 Camera module 101 Image sensor 102 Printed circuit board 103 Lens body M Magnet magnet Mg Magnetized surface O Optical axis

Claims (14)

  1. 天井部に開口部が形成されたケースと、少なくとも一部が前記ケースの内側に位置してレンズ体を搭載可能なレンズ保持部材と、前記レンズ保持部材を前記レンズ体の光軸方向へ移動自在に支持する弾性支持部材と、前記レンズ保持部材に形成された筒状部の外側部に配置されたコイルと、前記ケース内に設けられて前記コイルに対向する磁石と、を有するレンズ駆動装置において、前記レンズ保持部材の筒状部の外側部に、前記光軸を中心とする周回方向に沿うように延びるフランジ部が設けられ、前記フランジ部が、前記コイルと前記光軸方向で対向しており、前記フランジ部の前記コイルに向く表面に、前記レンズ保持部材を合成樹脂材料で射出成型したときのイジェクトピンの成型痕が形成されていることを特徴とするレンズ駆動装置。 A case in which an opening is formed in the ceiling, a lens holding member on which at least a part is located inside the case and on which a lens body can be mounted, and the lens holding member is movable in the optical axis direction of the lens body In a lens driving device, comprising: an elastic support member that is supported on a coil; a coil disposed on an outer side of a cylindrical portion formed on the lens holding member; and a magnet that is provided in the case and faces the coil. A flange portion is provided on an outer side portion of the cylindrical portion of the lens holding member so as to extend along a circumferential direction around the optical axis, and the flange portion is opposed to the coil in the optical axis direction. The lens driving device is characterized in that a molding mark of an eject pin when the lens holding member is injection-molded with a synthetic resin material is formed on a surface of the flange portion facing the coil. .
  2. 前記フランジ部は、光軸方向における前記レンズ保持部材の一端部に形成されている請求項１記載のレンズ駆動装置。 The lens driving device according to claim 1, wherein the flange portion is formed at one end of the lens holding member in the optical axis direction.
  3. 前記ケースの内部に、先端部が前記フランジ部に対向する内壁部が設けられ、前記内壁部の前記フランジ部に向く先端部に、前記成型痕に対向する凹部が形成されている請求項１または２に記載のレンズ駆動装置。 An inner wall portion having a tip portion facing the flange portion is provided inside the case, and a recess portion facing the molding mark is formed at a tip portion of the inner wall portion facing the flange portion. 3. The lens driving device according to 2.
  4. 前記凹部は、前記内壁部の幅方向の中間部に形成されている請求項３記載のレンズ駆動装置。 The lens driving device according to claim 3, wherein the concave portion is formed in an intermediate portion of the inner wall portion in the width direction.
  5. 前記フランジ部が前記内壁部の先端部に当たって、前記レンズ保持部材の前記光軸方向の移動が規制される請求項３または４記載のレンズ駆動装置。 5. The lens driving device according to claim 3, wherein movement of the lens holding member in the optical axis direction is restricted when the flange portion abuts on a tip portion of the inner wall portion.
  6. 前記ケースが磁性材料で形成されて、前記内壁部が対向ヨーク部として機能しており、　前記内壁部が、前記レンズ保持部材の筒状部と前記コイルとの間の隙間内に位置し、前記ケースの内部に固定された磁石が、前記コイルの外側に対向し、　前記成型痕は、前記レンズ保持部材の筒状部と前記コイルとの前記隙間内に対向する位置に形成されている請求項３ないし５のいずれかに記載のレンズ駆動装置。 The case is formed of a magnetic material, and the inner wall portion functions as a counter yoke portion; the inner wall portion is located in a gap between the cylindrical portion of the lens holding member and the coil; A magnet fixed inside the case faces the outside of the coil, and the molding mark is formed at a position facing the gap between the cylindrical portion of the lens holding member and the coil. The lens driving device according to any one of 3 to 5.
  7. 前記成型痕は、前記フランジ部の複数個所に形成されている請求項１ないし６のいずれかに記載のレンズ駆動装置。 The lens driving device according to claim 1, wherein the molding marks are formed at a plurality of locations of the flange portion.
  8. 前記請求項１ないし７のいずれかに記載のレンズ駆動装置と、前記レンズ駆動装置の前記レンズ保持部材に保持されたレンズ体と、前記レンズ体に対向する撮像素子と、を有することを特徴とするカメラモジュール。 A lens driving device according to any one of claims 1 to 7, a lens body held by the lens holding member of the lens driving device, and an imaging element facing the lens body. Camera module to do.
  9. 天井部に開口部が形成されたケースと、少なくとも一部が前記ケースの内側に位置してレンズ体を搭載可能なレンズ保持部材と、前記レンズ保持部材を前記レンズ体の光軸方向へ移動自在に支持する弾性支持部材と、前記レンズ保持部材に形成された筒状部の外側部に配置されたコイルと、前記ケース内に設けられて前記コイルに対向する磁石と、を有するレンズ駆動装置の製造方法において、金型内に合成樹脂材料を射出して前記筒状部を有する前記レンズ保持部材を成型し、前記レンズ保持部材の筒状部の外側部に、前記光軸を中心とする周回方向に沿うように延びるフランジ部を形成し、前記フランジ部の前記光軸方向に向く表面をイジェクトピンで押し、成型後の前記レンズ保持部材を前記金型から離脱させて、前記フランジ部の表面に、前記イジェクトピンによる成型痕を形成し、前記レンズ保持部材の筒状部の外側部に、前記フランジ部に対向する前記コイルを装備させることを特徴とするレンズ駆動装置の製造方法。 A case in which an opening is formed in the ceiling, a lens holding member on which at least a part is located inside the case and on which a lens body can be mounted, and the lens holding member is movable in the optical axis direction of the lens body An elastic support member that is supported on the lens, a coil disposed on an outer side of a cylindrical portion formed on the lens holding member, and a magnet that is provided in the case and faces the coil. In the manufacturing method, the lens holding member having the cylindrical portion is molded by injecting a synthetic resin material into the mold, and the outer periphery of the cylindrical portion of the lens holding member is rotated around the optical axis. Forming a flange portion extending along the direction, pressing a surface of the flange portion facing the optical axis direction with an eject pin, and removing the lens holding member after molding from the mold; In the molding marks formed by ejector pin on the outside of the cylindrical portion of the lens holding member, the manufacturing method of the lens driving apparatus for causing equipped with a coil opposed to the flange portion.
  10. 前記フランジ部は、光軸方向における前記レンズ保持部材の一端部に形成する請求項９記載のレンズ駆動装置の製造方法。 The method for manufacturing a lens driving device according to claim 9, wherein the flange portion is formed at one end portion of the lens holding member in the optical axis direction.
  11. 前記ケースの内部に、先端部が前記フランジ部に対向する内壁部を設け、前記内壁部の前記フランジ部に向く先端部に、前記成型痕に対向する凹部を形成する請求項９または１０に記載のレンズ駆動装置の製造方法。 The inner wall portion whose tip portion faces the flange portion is provided inside the case, and a concave portion facing the molding mark is formed at a tip portion of the inner wall portion facing the flange portion. Method for manufacturing the lens driving device of the present invention.
  12. 前記凹部を、前記内壁部の幅方向の中間部に形成する請求項１１記載のレンズ駆動装置の製造方法。 The method for manufacturing a lens driving device according to claim 11, wherein the concave portion is formed in an intermediate portion in the width direction of the inner wall portion.
  13. 前記ケースを磁性材料で形成して、前記内壁部を対向ヨーク部とし、前記ケース内に前記レンズ保持部材を組み込む際に、前記内壁部を、前記レンズ保持部材の筒状部と前記コイルとの間の隙間内に入り込ませ、前記ケースの内部に固定された磁石を、前記コイルの外側に対向させ、前記成型痕を、前記レンズ保持部材の筒状部と前記コイルとの前記隙間内に位置する前記内壁部に対向させる請求項１１または１２に記載のレンズ駆動装置の製造方法。 The case is formed of a magnetic material, the inner wall portion is used as a counter yoke portion, and when the lens holding member is assembled in the case, the inner wall portion is formed between the cylindrical portion of the lens holding member and the coil. The magnet fixed in the case is opposed to the outside of the coil, and the molding mark is positioned in the gap between the cylindrical portion of the lens holding member and the coil. The manufacturing method of the lens drive device of Claim 11 or 12 made to oppose the said inner wall part.
  14. 前記成型痕を、前記フランジ部の複数個所に形成する請求項９ないし１３のいずれかに記載のレンズ駆動装置の製造方法。 The method for manufacturing a lens driving device according to claim 9, wherein the molding marks are formed at a plurality of locations of the flange portion.
PCT/JP2018/009011 2017-03-24 2018-03-08 Lens drive device, camera module using lens drive device, and method for producing lens drive device WO2018173776A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017058748A JP2020079814A (en) 2017-03-24 2017-03-24 Lens drive device, camera module using the same, and method of producing the same
JP2017-058748 2017-03-24

Publications (1)

Publication Number Publication Date
WO2018173776A1 true WO2018173776A1 (en) 2018-09-27

Family

ID=63585307

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/009011 WO2018173776A1 (en) 2017-03-24 2018-03-08 Lens drive device, camera module using lens drive device, and method for producing lens drive device

Country Status (2)

Country Link
JP (1) JP2020079814A (en)
WO (1) WO2018173776A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005108365A (en) * 2003-10-01 2005-04-21 Ntn Corp Lens holder and lens protector of optical pickup, and their manufacturing method
JP2005300690A (en) * 2004-04-07 2005-10-27 Seiko Precision Inc Lens unit
JP2012088728A (en) * 2004-08-05 2012-05-10 Mitsumi Electric Co Ltd Lens drive device
JP2015099322A (en) * 2013-11-20 2015-05-28 アルプス電気株式会社 Lens drive device
JP2016071367A (en) * 2014-09-26 2016-05-09 日本電産サンキョー株式会社 Lens unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005108365A (en) * 2003-10-01 2005-04-21 Ntn Corp Lens holder and lens protector of optical pickup, and their manufacturing method
JP2005300690A (en) * 2004-04-07 2005-10-27 Seiko Precision Inc Lens unit
JP2012088728A (en) * 2004-08-05 2012-05-10 Mitsumi Electric Co Ltd Lens drive device
JP2015099322A (en) * 2013-11-20 2015-05-28 アルプス電気株式会社 Lens drive device
JP2016071367A (en) * 2014-09-26 2016-05-09 日本電産サンキョー株式会社 Lens unit

Also Published As

Publication number Publication date
JP2020079814A (en) 2020-05-28

Similar Documents

Publication Publication Date Title
US10739550B2 (en) Voice coil motor
US8896749B2 (en) Lens holder driving device capable of preventing deformation due to heat
US9057812B2 (en) Lens holder driving device capable of easily mounting upper elastic member to outer yoke
CN101689010B (en) camera module
CN107664897B (en) Lens driving device and method for manufacturing the same
RU2476913C2 (en) Camera module
CN104969108B (en) Camera model
CN107664896B (en) Lens driving device and method for manufacturing the same
JP2009080217A (en) Lens driving device, camera and mobil phone with camera
US20140256379A1 (en) Lens holding device
KR101206716B1 (en) Camera module with autofocus
US9395510B2 (en) Lens holding device for camera module
CN103792644B (en) Lens mount driving means and portable equipment
TWI579630B (en) Lens driving module
KR20150120145A (en) Camera module
US9341809B2 (en) Lens focusing device
CN106291862A (en) Camera model
CN107544123B (en) Lens driving device
CN107991752B (en) Lens driving device, camera module, and method for manufacturing lens driving device
US9093889B2 (en) Manufacturing method for lens drive device
KR20120095010A (en) Mover for voice coil motor and voice coil motor having the same
WO2018173776A1 (en) Lens drive device, camera module using lens drive device, and method for producing lens drive device
JP6793065B2 (en) Lens driving device, manufacturing method of camera module and lens driving device using the lens driving device
JP2019003149A (en) LENS DRIVE DEVICE, CAMERA MODULE USING THE LENS DRIVE DEVICE, AND METHOD FOR MANUFACTURING LENS DRIVE DEVICE
KR102402900B1 (en) Camera module manufacturing method and camera module manufacturing kit

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18771052

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18771052

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载