JP2017227695A - Lens drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens drive device of which wiring is hardly disconnected even when a strong impact is applied to a lens drive device main body.SOLUTION: A lens drive device 100 comprises: a lens holding member 20; a leaf spring; and a coil 10, in which in the lens holding member 20, a prismatic-shape protruberance 21 is provided that has a plurality of corner parts 22 including a first corner part 23, the coil 10 has: a coil main body part 11 that is formed with a conducting wiring material 19 wound around an outer perimeter of the lens holding member 20; a winding part 13 that has the wiring material wound around the protruberance 21; and lead part 15 that is located between the coil main body part 11 and the winding part 13, and the leaf spring has a joint part located adjacent to the winding part 13 which is jointed to the joint part by a joint material. In the lens drive device, the first corner part 23 is a corner part on which the wiring material 19 of the winding part 13 extending from the lead part 15 of the plurality of corner parts 22 is first to abut, and has an arc-shape curve part 23a gentler than other corner parts 22.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a lens driving device, and more particularly to a lens driving device in which an end of a coil is connected to a leaf spring with solder or the like.

  Some portable electronic devices such as mobile phones and smartphones have a camera function. A lens used for photographing with these devices is driven by a lens driving device using a VCM (Voice Coil Motor). The lens driving device includes a lens holding member that can hold the lens body, a drive mechanism that moves the lens holding member along the optical axis direction, and a lens holding member that is movably supported in the optical axis direction. An urging member is provided. A coil is provided in the drive mechanism, and a leaf spring is used as the biasing member. And the coil is comprised so that the edge part may be soldered to a leaf | plate spring.

  As a lens driving device in which the end of such a coil is soldered to a leaf spring, a lens driving device described in Patent Document 1 is known. Hereinafter, the lens driving device 900 described in Patent Document 1 will be described with reference to FIG.

  The lens driving device 900 includes a lens holding member 901, a plate spring 902 that supports the lens holding member 901 in a movable manner, a support member to which the plate spring 902 is fixed, and the lens holding member 901 that moves along the optical axis direction. And a moving mechanism composed of at least a magnet and a coil 905. A projecting portion 901a projecting downward (Z2 direction) from the plate spring 902 is provided at the lower portion (Z2 side) of the lens holding member 901, and an end portion 905b of the coil 905 is wound around the projecting portion 901a. The spring 902 is provided with a joint 902a, and the end 905b of the coil 905 and the joint 902a are soldered. The separation distance between the end portion 905b of the coil 905 wound around the protruding portion 901a and the joint portion 902a is configured to be larger on the distal end side of the protruding portion 901a than on the base portion side of the protruding portion 901a.

  With such a configuration, the lens driving device 900 can surely solder the end portion 905b of the coil 905 to the leaf spring 902, and both come into contact when the leaf spring 902 is attached to the lens holding member 901. There is an effect that can be prevented.

Japanese Patent Laying-Open No. 2015-099322

  In the lens driving device 900, the wire material of the coil 905 is wound around the protruding portion 901 a provided on the lens holding member 901. However, since the protruding portion 901a is formed in a prismatic shape having a plurality of corners, the wire material of the coil 905 may be disconnected at the corners when an undesirably strong impact is applied due to dropping or the like. there were. In particular, the possibility that the wire of the coil 905 at the corner where the wire of the coil 905 starts to be wound is relatively high when a strong impact such as dropping is applied.

  The present invention has been made in view of the actual situation of the prior art, and provides a lens driving device in which even when a strong impact is applied to the lens driving device main body, the coil wire is less likely to be disconnected.

  In order to solve the above problems, a lens driving device according to the present invention includes a cylindrical lens holding member that can hold a lens body, and a part of the lens driving member that is fixed to the lens holding member so that the lens holding member can move in the optical axis direction. And a drive mechanism configured to include at least a magnet and a coil for moving the lens holding member along the optical axis direction, and the lens holding member includes a first corner portion. A prism-shaped projecting portion having a plurality of corner portions is provided so as to project along the optical axis direction, and the coil is formed by winding a conductive wire around an outer periphery of the lens holding member; and A winding portion in which the wire rod is wound around the protruding portion; and a routing portion positioned between the coil body portion and the winding portion, and the leaf spring is adjacent to the winding portion. The winding part In the lens driving device in which the joint portion of the leaf spring is joined with a joining material, the first corner portion is first contacted with the wire of the winding portion extending from the routing portion among the plurality of corner portions. It has a feature that it has a curved surface portion that is in contact with it and has an arc shape that is gentler than other corner portions.

  In the lens driving device configured as described above, the first corner of the projecting portion, which is first contacted by the wire of the winding portion extending from the drawing portion, has a gentle arc-shaped curved surface portion. Even when is added, the wire can be hardly cut at the first corner.

  Further, in the above-described configuration, the wire rod can come into contact with the outside of the projecting portion and has an arc shape larger than the arc shape of the first corner portion, and the wire material of the routing portion is guided to the projecting portion side. A guide portion is provided, and the wire extends along the guide portion to the first corner portion.

  In the lens driving device configured as described above, the wire is guided to the first corner via the guide having a larger arc shape than the curved surface of the first corner, and the first corner protrudes. Since the curved part of the arc shape is gentler than the other corners of the part, the wire is gradually changed in curvature from the coil body part to the winding part, and stress is applied to the wire. It is difficult to join, and the wire can be made more difficult to break.

  Further, in the above configuration, the protruding portion is provided adjacent to the guide portion so that one side surface of the protruding portion and the guide portion are continuous.

  Since the lens driving device configured in this way is adjacent so that the projecting portion and the guide portion are continuous, the wire rod can be prevented from being disconnected between the projecting portion and the guide portion.

  Further, in the above configuration, the lens holding member is provided with a pedestal portion, the guide portion is constituted by a part of a peripheral surface of the pedestal portion, and the protruding portion is the pedestal portion. It has the characteristic that it is provided on.

  In the lens driving device configured as described above, since the protruding portion is provided on the pedestal portion, it is easy to form the winding portion by winding the wire from the base portion of the protruding portion.

  In the above configuration, the projecting portion has a substantially quadrangular prism shape, and a part of the winding portion is located between the first corner portion and the guide portion and the projecting portion. It is located opposite to each other and is linearly held by the protruding portion, and the wire material of the portion is joined to the leaf spring.

  In the lens driving device configured as described above, since the protruding portion has a substantially quadrangular prism shape, even if there is a curved surface portion having a large arc shape at the first corner portion, the wire rod is used as the protruding portion at the other corner portion. It can be held properly. Moreover, since the linear winding part located between two corners different from the first corner is joined to the leaf spring, joining with a joining material such as solder is also performed well.

  In the lens driving device according to the present invention, the first corner of the projecting portion, which is first contacted by the wire of the winding portion extending from the drawing portion, has a gentle arc-shaped curved surface portion, so that a large impact is applied by dropping or the like. Even in this case, the wire can be hardly cut at the first corner.

It is a disassembled perspective view which shows each member which comprises the lens drive device in embodiment of this invention. It is a perspective view which shows the external appearance of a lens drive device. It is a perspective view which shows the external appearance of the lens drive device of a state except a yoke and a cover. It is a perspective view of the lens holding member to which the coil and the leaf | plate spring were attached. It is an expansion perspective view of a lens holding member. It is an expansion perspective view of the lens holding member by which the wire of the coil was wound. It is an enlarged side view of a lens holding member to which a coil and a leaf spring are soldered. It is an enlarged perspective view of a lens holding member to which a coil and a leaf spring are soldered. It is a side view which shows the lens holding member by which the coil based on a prior art example was wound.

[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The lens driving device 100 according to the present embodiment is used as a VCM used for a camera built in a portable electronic device such as a mobile phone or a smartphone. The use of the lens driving device 100 according to the present embodiment is not limited to these and can be changed as appropriate.

  First, the overall configuration of the lens driving device 100 will be described with reference to FIGS. 1 to 4. FIG. 1 is an exploded perspective view showing each member constituting the lens driving device 100, and FIG. 2 is a perspective view showing an appearance of the lens driving device 100. 3 is a perspective view showing the appearance of the lens driving device 100 with the yoke 56 and the cover 60 removed, and FIG. 4 shows the lens holding member 20 with the coil 10 and the leaf spring 30 attached. FIG. 4 is drawn with the + Z direction on the lower side of the drawing, contrary to FIGS. 2 and 3.

  As shown in FIG. 1, the lens driving device 100 includes a base member 40 made of a synthetic resin material, a lens holding member 20 disposed on the upper side of the base member 40, and the lens holding member 20 in the optical axis direction L1 (Z direction). A drive mechanism 50 having a leaf spring 30 and an upper leaf spring 33 that are movably supported, a yoke 56, a plurality of magnets 54 and a coil 10, and moving the lens holding member 20 along the optical axis direction L1; A metal plate member 45 provided on the base member 40 and a cover 60 are provided.

  As shown in FIG. 2, the lens driving device 100 is formed in a substantially rectangular parallelepiped shape, and a large opening penetrating in the Z direction is formed in the central portion. The lens body, which is an external component, can be held by the lens holding member 20 and can be driven by the drive mechanism 50 in the optical axis direction L1 (Z direction). In the lens driving device 100, a cover 60 made of a synthetic resin material is attached to protect the upper leaf spring 33.

  The yoke 56 constituting a part of the drive mechanism 50 is made of a metal plate material, and is formed in a rectangular shape in plan view with the Z direction opened as shown in FIG. The yoke 56 has a top surface 56a with an opening formed in the center. The yoke 56 has an annular outer wall portion 56b that forms the side surface of the yoke 56 continuously from the outer periphery of the top surface 56a, and a continuous surface from the opening of the top surface 56a. Four inner wall portions 56c (see FIG. 1) facing the corner portions of the outer wall portion 56b are provided inside the outer wall portion 56b.

  The lens holding member 20 is made of a synthetic resin material, and is formed in a substantially cylindrical shape as shown in FIG. As shown in FIG. 4, the lens holding member 20 includes a cylindrical portion 26 that extends in the Z direction and is formed in a cylindrical shape. A flange 24 is provided that extends in the radial direction of the portion 26. Further, the inside of the cylindrical portion 26 is a lens holding portion 25 formed in a cylindrical shape capable of holding a lens body which is an external component. The lens holding part 25 is formed with a screw groove 25 a on which a lens body can be attached along the inner peripheral surface of the lens holding part 25.

  The coil 10 is composed of a conductive wire 19 and is formed by bundling around a lens holding member 20 in a substantially octagonal ring shape around the lens holding member 20 as shown in FIG. Is configured. By passing a current through the coil 10, the driving mechanism 50 shown in FIG. 2 can be driven to move the lens holding member 20 holding the lens body in the optical axis direction L1. The configuration of the coil 10 will be described in detail later.

  As shown in FIG. 3, the magnet 54 is formed in a columnar shape having a substantially trapezoidal shape in plan view. In the present embodiment, four magnets 54 are used, and the four magnets 54 are respectively attached to the corner portions of the outer wall portion 56b of the yoke 56 shown in FIG. The magnet 54 is magnetized in the direction of a straight line perpendicular to the substantially trapezoidal short side surface and the long side surface (strictly, a circular arc surface).

  The plate spring 30 and the upper plate spring 33 are made of conductive metal thin plates, and the plate spring 30 and the upper plate spring 33 are arranged facing each other with the lens holding member 20 interposed therebetween as shown in FIG. Has been. The leaf spring 30 and the upper leaf spring 33 are insulated.

  The leaf spring 30 constitutes a lower (−Z side) leaf spring, and is formed by two leaf spring portions 31 as shown in FIG. 4. The two leaf spring portions 31 are each a spring portion of two thin metal plates in which an inner portion 31a formed in an arc shape in plan view and an outer portion 31b forming the outer periphery of the leaf spring 30 have a meander shape. Connected by 31c. The leaf spring 30 is formed in a substantially square shape in which two leaf spring portions 31 are arranged to face each other, the two leaf spring portions 31 are paired, and have an opening in the center in plan view. The two leaf spring portions 31 are each connected to the coil 10 described above by solder. As a result, the two leaf spring portions 31 are electrically connected via the coil 10.

  Further, as shown in FIG. 3, the upper leaf spring 33 includes an inner portion 33 a formed in a substantially circular shape in plan view and a substantially square outer portion 33 b that forms the outer periphery of the upper leaf spring 33. The four thin metal plate spring portions 33c are connected to each other and formed into a substantially square shape having an opening in the center in plan view.

  As shown in FIG. 4, the leaf spring 30 is attached to two attachment portions 29 provided at a plurality of positions on the lens holding member 20, as shown in FIG. 4. Further, two outer portions 31b that are combined to form a substantially square outer periphery are attached to attachment portions 49 provided at a plurality of locations on the base member 40, as shown in FIG. Similarly, in the upper leaf spring 33, an inner portion 33a that forms an opening is attached to the lens holding member 20 with an adhesive, and an outer portion 33b that forms a substantially square outer periphery protrudes from the lower surface of the cover 60 ( (Not shown) and attached together with the top surface 56a of the yoke 56.

  With such a configuration, the inner portions 31a of the two leaf spring portions 31 that form the openings of the leaf springs 30 are Z with respect to the outer portions 31b of the two leaf spring portions 31 that form a substantially square outer periphery. The structure is movable in the direction. The same applies to the upper leaf spring 33. In other words, the lens holding member 20 holding the lens body is movable in the optical axis direction L1 (Z direction) with respect to the base member 40 and the cover 60 fixed to the portable electronic device incorporating the lens driving device 100. It becomes a structure. As a result, it is possible to cause the lens holding member 20 holding the lens body to generate a thrust force in the optical axis direction L1 by causing the current to flow through the coil 10 to operate the drive mechanism 50.

  A metal plate member 45 is embedded in the base member 40. As shown in FIG. 3, a part of the metal plate member 45 is exposed from the bottom surface of the base member 40. The metal plate member 45 is composed of a plurality of members, one of which is connected to one plate spring portion 31 of the plate spring 30 described above, and the other member is the other plate of the plate spring 30. It is connected to the spring part 31. Each member of the metal plate member 45 connected to each of the two leaf springs 31 is connected to a portable electronic device main body such as a mobile phone or a smartphone in which the lens driving device 100 is built, and the two leaf springs. A voltage for driving a lens from the portable electronic device main body is applied between the parts 31 so that a current flows through the coil 10.

  Next, referring to FIGS. 4 to 8, the structure of the lens holding member 20, the manner in which the coil 10 is wound around the protruding portion 21, and the coil 10 and the leaf spring 30 on the lens holding member 20. The joining will be described. FIG. 5 is an enlarged perspective view of the lens holding member 20, and FIG. 6 is an enlarged perspective view of the lens holding member 20 in a state where the wire 19 of the coil 10 is wound. 7 is an enlarged side view of the lens holding member 20 schematically showing a state in which the coil 10 and the leaf spring 30 are soldered. FIG. 8 is a view in which the coil 10 and the leaf spring 30 are soldered. FIG. 6 is an enlarged perspective view of the lens holding member 20 in a state in which the lens is held. 5 to 8 are also drawn with the + Z direction at the bottom of the drawing, as in FIG.

  As shown in FIG. 4, the projection 24 of the lens holding member 20 is provided with two projections 21 that project along the optical axis direction L1 (Z direction). The wire 19 which forms 10 is wound respectively. By winding the wire 19 of the coil 10 around the two protruding portions 21, both ends of the coil 10 can be held by the lens holding member 20. Of the two protruding portions 21, the position of the protruding portion 21 on the -X side in FIG. 4 is the winding start side in the coil 10, and the position of the protruding portion 21 on the + X side is the winding end side. In FIGS. 5 to 8 to be described later, the winding end side of the coil 10 is displayed.

  As shown in FIG. 4, the coil 10 includes a coil main body portion 11 formed by winding a wire 19 around the outer periphery of the lens holding member 20, and a winding portion 13 in which the wire 19 is spirally wound around the protruding portion 21. And a routing portion 15 positioned between the coil main body portion 11 and the winding portion 13.

  As shown in FIG. 5, the lens holding member 20 is provided with a pedestal portion 27 having a substantially rectangular shape in plan view, which is formed one step higher than the flange portion 24 in the −Z direction. It is provided on the portion 27. The protruding portion 21 is provided to protrude in a prismatic shape along the optical axis direction L1. That is, the protruding portion 21 extends from the base portion 21b on the pedestal portion 27 in the upward direction (−Z direction) in FIG. 5 and has a tip portion 21a having a flat upper surface, and is located on the + Y side. It has four side surfaces including the side surface 21c, and is formed in a substantially quadrangular prism shape.

  The protrusion 21 has a plurality of (four in this embodiment) corners 22 composed of two inner corners 22a and two outer corners 22b, and one of the two inner corners 22a. Constitutes the first corner 23.

  As shown in FIG. 6, the first corner portion 23 is a corner portion at which the wire 19 of the winding portion 13 extending from the routing portion 15 of the coil 10 first contacts among the plural (four) corner portions 22. In addition, as shown in FIGS. 5 and 6, it has a curved surface portion 23 a having an arc shape that is gentler than the other corner portions 22.

  Further, on the outer side (outer peripheral side) from the projecting portion 21, the wire 19 can abut and has an arc shape larger than the arc shape of the curved surface portion 23 a of the first corner portion 23, and the wire material 19 of the routing portion 15 is projected to A guide portion 28 that guides to the side 21 is provided, and the wire 19 extends to the first corner portion 23 along the guide portion 28. As shown in FIG. 5, the protruding portion 21 is provided adjacent to the guide portion 28 so that one side surface 21 c of the protruding portion 21 and the above-described guide portion 28 are continuous.

  The guide portion 28 is configured by a part of the peripheral surface of the pedestal portion 27, and is an inclined surface 28 a that rises in the −Z direction from the + X side end portion of the pedestal portion 27 toward the first corner portion 23. Is formed on the side. Therefore, as shown in FIG. 6, the wire rod 19 of the routing portion 15 extends to the first corner portion 23 while abutting against the guide portion 28 and the inclined surface 28a.

  As shown in FIG. 6, the coil 10 has a curved surface portion 23a of the first corner portion 23 which is one inner corner portion 22a after the wire 19 of the routing portion 15 extends from the guide portion 28 to the first corner portion 23. Along the other inner corner 22a and two outer corners 22b. The wire 19 is wound around the protruding portion 21 a plurality of times to form the wound portion 13.

  When the first corner 23 of the projecting portion 21 that first contacts the wire 19 of the winding portion 13 extending from the routing portion 15 has a gentle arc-shaped curved surface portion 23a, a large impact is applied due to dropping or the like. However, the wire 19 is hardly cut at the first corner portion 23. On the other hand, the wire 19 can be reliably held at the inner corner 22a other than the first corner 23 of the protrusion 21 and the two outer corners 22b.

  As shown in FIG. 7, the leaf spring 30 has an outer portion 31 b located on the −Z side, an inner portion 31 a located on the + Z side, and the outer portion 31 b outside the protruding portion 21 (front side in FIG. 7). The inner portion 31a is located on the inner side and the side of the protruding portion 21. Further, the + Z side of the inner portion 31 a is the one surface 30 a of the leaf spring 30, and the −Z side of the inner portion 31 a is the other surface 30 b of the leaf spring 30.

  Further, the plate spring 30 is provided with one surface 30a of the plate spring 30 facing the flange portion 24 of the lens holding member 20 in parallel and having a predetermined interval in a side view. The protrusion 21 described above is provided so as to protrude from the pedestal 27 of the lens holding member 20 toward the other surface 30b of the leaf spring 30 as described above. Further, the tip 21 a of the protruding portion 21 protrudes in the −Z direction from the end of the wire 19 that forms the winding portion 13 of the coil 10.

  The leaf spring 30 has a joining portion 30 c at the inner portion 31 a, and the wire 19 of the winding portion 13 and the joining portion 30 c of the leaf spring 30 are joined by the joining material 71. The joint portion 30 c is provided in a portion adjacent to the protruding portion 21 on the other surface 30 b side of the leaf spring 30. As the bonding material 71, solder is used. In this embodiment, solder is used as the bonding material 71, but a conductive adhesive may be used as the bonding material 71.

  As shown in FIG. 8, a part of the winding portion 13 of the coil 10 includes a wire rod 19 and a protruding portion 21 positioned between the first corner portion 23 of the protruding portion 21 and a guide portion 28 adjacent to the protruding portion 21. The wire rod 19 is linearly held by the protruding portion 21, and the wire rod 19 of the portion is joined to the leaf spring 30. The wire rod 19 is a wire rod 19 wound between two corner portions 22 including an inner corner portion 22a different from the first corner portion 23 and an outer corner portion 22b adjacent to the inner corner portion 22a. In this manner, the portion of the linear winding portion 13 between the two corner portions 22 composed of the inner corner portion 22a of the winding portion 13 and the adjacent outer corner portion 22b is joined to the leaf spring 30. Therefore, joining is performed satisfactorily.

  An insulating film is applied to the wire rod 19 of the coil 10 located on the side of the coil main body 11 and the lead-out portion 15, but the insulating film is applied to the wire rod 19 of the winding portion 13 to be soldered. It has not been. Therefore, soldering between the wire 19 of the winding part 13 of the coil 10 and the joint part 30c of the leaf spring 30 becomes possible. Prior to soldering, preliminary soldering may be applied to the wire 19 of the winding portion 13 on which the insulating film is applied so that the wire is easily soldered.

  In the present embodiment, the winding portion 13 in the protruding portion 21 on the winding end side of the coil 10 is described. However, the winding portion 13 in the protruding portion 21 on the winding start side of the coil 10 is also applied. May be.

  Hereinafter, the effect by having set it as this embodiment is demonstrated.

  In the lens driving device 100, the first corner portion 23 of the projecting portion 21 with which the wire rod 19 of the winding portion 13 extending from the drawing portion 15 first contacts has a gently-curved curved surface portion 23a. Even when an impact is applied, the wire 19 can be hardly cut at the first corner portion 23.

  The wire rod 19 is guided to the first corner portion 23 via the guide portion 28 having an arc shape larger than the curved surface portion 23 a of the first corner portion 23, and the first corner portion 23 is Since the curved surface portion 23a having an arc shape that is gentler than the other corner portions 22 is provided, the wire 19 is guided from the coil main body portion 11 to the winding portion 13 with gradually changing the curvature. It is difficult for stress to be applied to 19 and wire 19 can be made more difficult to break.

  Moreover, since the protrusion part 21 and the guide part 28 are adjacent so that it may continue, it can prevent that the wire 19 disconnects between the protrusion part 21 and the guide part 28. FIG.

  Moreover, since the protrusion part 21 is provided on the base part 27, it is easy to form the winding part 13 by winding the wire 19 from the base part 21b of the protrusion part 21.

  In addition, since the protruding portion 21 has a substantially quadrangular prism shape, the wire rod 19 is appropriately held by the protruding portion 21 at the other corner portion 22 even if the first corner portion 23 has a curved surface portion 23a having a large arc shape. it can. Moreover, since the linear winding part 13 located between the two corner | angular parts 22 different from the 1st corner | angular part 23 is joined with the leaf | plate spring 30, joining by solder etc. is performed favorably.

  As described above, in the lens driving device of the present invention, the first corner portion of the projecting portion that first contacts the wire of the winding portion extending from the drawing portion has the gently curved surface portion, so that the drop or the like Even when a large impact is applied, the wire can be hardly cut at the first corner.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the form in which the end of the coil 10 is soldered to the leaf spring 30 on the −Z side (lower side) of the lens driving device 100 has been described. The present invention may be applied to the case where the end of the coil is soldered to the upper leaf spring on the + Z side (upper side) like a lens driving device having a function.

DESCRIPTION OF SYMBOLS 10 Coil 11 Coil main-body part 13 Winding part 15 Leading part 19 Wire material 20 Lens holding member 21 Projection part 21a Tip part 21b Root part 21c One side surface 22 Corner part 22a Inner corner part 22b Outer corner part 23 First corner part 23a Curved surface part 24 flange part 25 lens holding part 25a thread groove 26 cylindrical part 27 pedestal part 28 guide part 28a inclined surface 29 attachment part 30 leaf spring 30a one side 30b other side 30c joint part 31 leaf spring part 31a inner part 31b outer part 31c spring part 33 Upper plate spring 33a Inner portion 33b Outer portion 33c Spring portion 40 Base member 45 Metal plate member 49 Mounting portion 50 Drive mechanism 54 Magnet 56 Yoke 56a Top surface 56b Outer wall portion 56c Inner wall portion 60 Cover 71 Bonding material 100 Lens driving device L1 Light Axial direction

Claims (5)

A cylindrical lens holding member capable of holding a lens body, a leaf spring partially supported by the lens holding member and movably supporting the lens holding member in the optical axis direction, and the lens holding member in the optical axis direction A drive mechanism configured to include at least a magnet and a coil that are moved along
The lens holding member is provided with a prismatic protrusion having a plurality of corners including a first corner along the optical axis direction, and the coil is electrically conductive on the outer periphery of the lens holding member. A coil body portion formed by winding a wire, a winding portion around which the wire is wound around the projecting portion, and a routing portion positioned between the coil body portion and the winding portion. In the lens driving device, the leaf spring has a joint portion located adjacent to the winding portion, and the winding portion and the joint portion of the leaf spring are joined with a joining material.
The first corner portion is a corner portion where the wire rod of the winding portion extending from the routing portion among a plurality of the corner portions first comes into contact with the first corner portion, and a curved surface having an arc shape that is gentler than other corner portions. Have a part,
A lens driving device. Outside the protrusion, there is provided a guide portion that can contact the wire and has a larger arc shape than the arc shape of the first corner, and guides the wire of the routing portion toward the protrusion. And the wire extends along the guide portion to the first corner,
The lens driving device according to claim 1. The protruding portion is provided adjacent to the guide portion so that one side surface of the protruding portion and the guide portion are continuous.
The lens driving device according to claim 2. The lens holding member is provided with a pedestal portion, the guide portion is constituted by a part of the peripheral surface of the pedestal portion, and the protruding portion is provided on the pedestal portion.
The lens driving device according to claim 2, wherein the lens driving device is provided. The protruding portion has a substantially quadrangular prism shape, and a part of the winding portion is positioned opposite to the wire rod positioned between the first corner portion and the guide portion with the protruding portion interposed therebetween. In addition, the protrusion is held in a straight line, and the wire of the part is joined to the leaf spring.
The lens driving device according to any one of claims 2 to 4, wherein the lens driving device is provided.

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