JP6529581B2 - Lens drive - Google Patents

Description

  The present invention relates to, for example, a lens driving device mounted on a camera-equipped mobile device.

  In recent years, it has become common for camera mechanisms to be mounted on portable devices represented by mobile phones. In addition to the demand for downsizing, the demand for driving the lens body (lens barrel) with high precision has been increasing in the lens driving device which is a main component of the camera mechanism mounted on this small portable device. As a lens drive device which should satisfy these two requirements, it is well known that a magnetic circuit for driving a lens holder (lens holding member) holding a lens body is provided on four sides of the lens holder.

  As such a lens drive device, Patent Document 1 (conventional example) proposes a lens drive device 901 as shown in FIG. FIG. 16 is a view for explaining a lens drive device 901 according to the prior art, and FIG. 16 (a) is an exploded perspective view of the lens drive device 901 as viewed from the lower side. It is a process drawing explaining the electric connection method of the end (coil end 934 of the 1st coil 931), and a leaf spring (image side spring member 914x).

  A lens drive device 901 shown in FIG. 16A includes a movable body 903 (lens holder 937 and sleeve 913) movable in the optical axis direction while holding the lens, and a magnetic drive mechanism for driving the movable body 903 in the optical axis direction. 905 (a first coil 931, a second coil 932, four magnets 917 and a yoke 918), and a support 902 (a spring support member 911, a yoke 918 and a holder 919) on which the magnetic drive mechanism 905 and the moving body 903 are mounted. And an image-side spring member 914x and an object-side spring member 914y, which connect the support 902 and the movable body 903. Then, the lens drive device 901 applies a predetermined current to the coils (the first coil 931 and the second coil 932) via the image side spring member 914x, and the electromagnetic drive force generated by the magnetic drive mechanism 905 extends along the optical axis direction. The mobile unit 903 is moved.

  Further, in the lens drive device 901 of the conventional example, the end of the coil (the coil end 934 of the first coil 931 in FIG. 16B) and the plate spring (image in the connection method as shown in FIG. The side spring members 914x) are electrically connected. Specifically, first, in the first step B1, the binding pin 915 is held in the sleeve 913 in a direction such as press fitting. Next, in the next step B2, the coil end 934 at the beginning of winding of the first coil 931 is wound around the binding pin 915, for example, about 7 turns to 9 turns (9 turns in FIG. 16B). Next, in the next step B3, the tip of the binding pin 915 is irradiated with a laser to remove the insulating coating layer from the surface of the coil end 934, and the tip of the binding pin 915 is melted and deformed. As a result, at the tip of the binding pin 915, a conductive bulge portion 951 is formed. Next, the image-side spring member 914 x is attached to the end of the sleeve 913. Finally, in the final step B4, the coil end 934 (the bulge portion 951) of the first coil 931 and the image-side spring member 914x are connected by the conductive adhesive 955 or the like. Thus, the end of the coil and the leaf spring are electrically connected.

JP, 2010-286532, A

  However, in the configuration of the conventional example, the conductive adhesive 955 or the like includes the side surface of the binding pin 915 on which the coil end 934 (the end of the coil) is wound and the surface of the image side spring member 914x (leaf spring). Are provided so as to connect between the members arranged in an L shape. Then, in order to ensure the electrical connection between the end of the coil and the plate spring, the height of the binding pin 915 is increased to wind the coil end 934 longer (from 7 turns to 9 About the turn). For this reason, the height dimension in the optical axis direction of a lens holding member (lens holder 937) becomes large, and there existed a subject that the height dimension of a lens drive was not able to be reduced by extension.

  The present invention solves the above-mentioned problem, and an object of the present invention is to provide a lens drive device capable of reducing the height dimension in the optical axis direction.

In order to solve this problem, the lens drive device of the present invention has a cylindrical lens holding member capable of holding a lens body, an inner portion and an outer portion, and the inner portion is fixed to the lens holding member. A leaf spring movably supporting the lens holding member in the optical axis direction, a fixed side member to which the outer portion of the leaf spring is fixed, and at least a magnet and a coil for moving the lens holding member along the optical axis direction A drive mechanism configured to have a coil, the coil having a winding portion formed by winding a conductive wire, and an extension portion connected to an end of the winding portion in the lens driving device, the inner portion of the plate spring is fixed to one end in the direction of the optical axis of the lens holding member, the one end portion of the front Symbol lens holding member, wherein the inner portion and the optical axis direction Spaced apart A facing portion that faces, and a holding portion partially is held in the extending portion, the extending portion is between the one end and the other end in the direction of the optical axis of the lens holding member A connecting portion extending between the winding portion disposed on the outer circumferential surface located on the outer surface and the winding portion wound around the holding portion, and between the opposing portion and the inner portion A conductive adhesive for electrically connecting the connecting portion and the inner portion is provided, and the connecting portion is embedded in the conductive adhesive .

  According to this, the lens drive device of the present invention does not need to wind the end of the coil longer to provide the binding portion for securing the electrical connection, or increases the protruding height of the binding portion. There is no need. As a result, the height dimension of the lens holding member in the optical axis direction can be reduced, and hence the height dimension of the lens driving device in the optical axis direction can be reduced.

In addition , since the connection portion is embedded in the conductive adhesive between the facing portion and the inner portion, the conductive portion of the coil and the inner portion of the plate spring can be surely conductively connected at this connection portion. it can. Further, since the extension portion of the coil and the inner portion of the plate spring are conductively connected between the facing portion and the inner portion, even when the holding portion is a projecting tangled portion where the extension portion is tangled. , There is no need to increase its projecting dimension. For this reason, it is possible to reduce the height dimension in the optical axis direction of the lens holding member, and in turn, it is possible to reduce the height dimension in the optical axis direction of the lens drive device.

The lens driving device of the present invention, the the counter unit volume unit yield is provided, wherein the conductive adhesive to embed the connecting portion to the housing portion is characterized in that it is filled .

  According to this, when the conductive adhesive is filled, the flowable conductive adhesive can be held at a desired position (accommodating portion). For this reason, the connection part extended between the opposing part and the inner part is disposed in this accommodation part, and the connection part can be reliably embedded in the conductive adhesive. As a result, the extension of the coil and the inner portion of the leaf spring can be more reliably conductively connected.

Further, in the lens driving device according to the present invention, the housing portion is formed of a jetty portion projecting from the opposing portion to the inner portion side, and the jetty portion is a wall portion provided around the housing portion. The holding portion is provided on one side of the jetty portion, and an open portion in which the wall portion is cut away is formed on the other side of the jetty portion separated from the holding portion. The extension portion is inserted into the open portion.

  According to this, the extension portion of the coil can be inserted into the open portion, and even if the housing portion surrounded by the jetty portion is provided, interference between the jetty portion and the extension portion can be avoided. . Therefore, the distance between the facing portion of the lens holding member and the inner portion of the plate spring can be kept narrow. This can suppress the lens drive device from becoming large in the optical axis direction. Further, since the extension part is inserted through the open part, the conductive adhesive filled in the storage part can be made difficult to flow out through the open part.

  Further, in the lens drive device according to the present invention, the inner portion at the position facing the open portion is provided with a penetrating portion for preventing the conductive adhesive from moving in a direction away from the holding portion. It is characterized by

  According to this, even if the conductive adhesive moves in a direction away from the holding portion and flows out from the open portion, it is possible to prevent further flow out at the end edge portion constituting the penetration portion.

The lens driving device of the present invention, the holding portion, at a position adjacent to the receiving portion consists protrusion protruding to the opposite side of the other end from the one end portion of said lens holding member, wherein The conductive adhesive is provided between the winding portion and the inner portion.

  According to this, it is possible to easily hold the wound portion of the extension portion by winding the extension portion of the coil around the protrusion (holding portion). Moreover, a conductive adhesive is provided between the winding portion of the coil and the inner portion of the plate spring, and in addition to the connecting portion, conductive connection can be made at this winding portion. As a result, the area of the extension portion in contact with the conductive adhesive can be increased, and the conductive connection can be reliably made, and the conductive resistance between the plate spring and the coil can be reduced.

  Further, in the lens driving device according to the present invention, the inner portion has one surface opposite to the housing portion and the other surface which is the surface opposite to the one surface, and the tip of the protrusion is the other surface And the winding portion is provided so as to face the end face of the inner portion located opposite to the housing portion with a gap, and the winding portion is provided on the end face side. In the inner portion located there is formed a cutaway portion in which the winding portion side is opened, and the conductive adhesive is exposed from the cutaway portion.

  According to this, the conductive adhesive is also in contact with the end face of the notch, and the adhesion of the plate spring becomes reliable. Further, in the case where the housing portion is filled with the conductive adhesive and the plate spring is attached to the lens holding member thereafter, even if the filling amount of the conductive adhesive varies, the variation of the amount can be absorbed. That is, when the amount of the conductive adhesive is large, it is possible to cause the conductive adhesive to flow out to the other surface side of the inner portion of the plate spring from the notch. Furthermore, it can be checked through the notches that the conductive adhesive is properly provided.

  In the lens drive device of the present invention, it is not necessary to wind the end of the coil longer and to provide the binding portion for securing the electrical connection, or it is not necessary to increase the protruding height of the binding portion. As a result, the height dimension of the lens holding member in the optical axis direction can be reduced, and hence the height dimension of the lens driving device in the optical axis direction can be reduced.

It is a disassembled perspective view explaining the lens drive device of 1st Embodiment of this invention. It is a figure explaining the lens drive device of 1st Embodiment of this invention, Comprising: Fig.2 (a) is an upper perspective view, FIG.2 (b) is seen from Y2 side shown to Fig.2 (a). Front view. It is a figure explaining the lens drive device of 1st Embodiment of this invention, Comprising: Fig.3 (a) is the top view seen from Z 1 side shown in FIG. 2, FIG.3 (b) is FIG. It is the bottom view seen from the Z2 side shown. It is a figure explaining the lens drive device of 1st Embodiment of this invention, Comprising: Fig.4 (a) is the upper perspective view which abbreviate | omitted the yoke shown to Fig.2 (a), FIG.4 (b) is It is the front view which abbreviate | omitted the yoke shown in FIG.2 (b). It is a figure explaining the lens drive device of 1st Embodiment of this invention, Comprising: Fig.5 (a) is an upper perspective view of a lens holding member, FIG.5 (b) is a lens of Fig.5 (a). It is an upper perspective view which shows the state by which the coil was wound by the holding member. It is a figure explaining the lens drive device of 1st Embodiment of this invention, Comprising: Fig.6 (a) is a lower perspective view of a lens holding member, FIG.6 (b) is a lens of Fig.6 (a). It is a lower perspective view which shows the state by which the coil was wound by the holding member. It is a figure explaining the lens holding member concerning the lens drive device of 1st Embodiment of this invention, Comprising: Fig.7 (a) is a side view of the lens holding member seen from the X2 side shown to Fig.5 (a). 7 (b) is an enlarged side view of a portion R shown in FIG. 7 (a), and FIG. 7 (c) is a lower perspective view of FIG. 7 (b) as viewed from the lower side. It is a figure explaining the lens drive device of 1st Embodiment of this invention, Comprising: Fig.8 (a) is the lower perspective view which looked at the lens holding member shown to Fig.6 (a) from the X2 side. (B) is a lower perspective view which shows the state by which the coil was wound by the lens holding member shown to Fig.8 (a). It is a figure explaining the lens holding member concerning the lens drive device of 1st Embodiment of this invention, Comprising: Fig.9 (a) is an expansion lower perspective view of Q part shown in FIG.8 (b), FIG. (B) is an enlarged lower perspective view of P part shown in FIG.6 (b). It is a figure explaining the lens drive device of 1st Embodiment of this invention, Comprising: Fig.10 (a) is the bottom view which abbreviate | omitted the terminal and the base member, FIG.10 (b) is FIG.10 (a). Furthermore, it is the bottom view which abbreviate | omitted the lower side leaf | plate spring and the lens holding member. It is a figure explaining the leaf | plate spring of the lens drive device concerning 1st Embodiment of this invention, Comprising: Fig.11 (a) is a top view of an upper side leaf spring, FIG.11 (b) is a lower side leaf spring. It is a top view. It is a figure explaining the connection state of the leaf | plate spring and coil in the lens drive device of 1st Embodiment of this invention, Comprising: Fig.12 (a) is an enlarged bottom view of S part shown to Fig.10 (a). 12 (b) is an enlarged side view of a plate spring, a coil and a lens holding member as viewed from the X2 side of a portion S shown in FIG. 10 (a). It is a figure explaining the stationary-side member of the lens drive device concerning 1st Embodiment of this invention, Comprising: Fig.13 (a) is an upper perspective view of a base member, FIG.13 (b) is a base member. It is an upper perspective view which assembled the lower side leaf spring. It is a figure explaining the modification of the lens drive device concerning 1st Embodiment of this invention, Comprising: Fig.14 (a) is a schematic diagram of the modification 1 and the modification 2, FIG.14 (b) is a It is a schematic diagram of the modification 3 and the modification 4, and FIG.14 (c) is a schematic diagram of the modification 5 and the modification 6. As shown in FIG. FIG. 18 is a view for explaining a modification of the lens drive device according to the first embodiment of the present invention, and is a schematic view of Modifications 7 and 8. FIG. 16 (a) is an exploded perspective view of the lens driving device as viewed from below, and FIG. 16 (b) is an end portion of the coil (first It is process drawing explaining the electrical connection method of the coil end part of a coil, and a leaf | plate spring (image side spring member).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First Embodiment
FIG. 1 is an exploded perspective view for explaining a lens driving device 101 according to a first embodiment of the present invention. 2 (a) is a top perspective view of the lens drive device 101, and FIG. 2 (b) is a front view of the lens drive device 101 seen from the Y2 side shown in FIG. 2 (a). 3 (a) is a top view of the lens drive device 101 seen from the Z1 side shown in FIG. 2, and FIG. 3 (b) is a bottom view of the lens drive device 101 seen from the Z2 side shown in FIG. is there. FIG. 4 (a) is a top perspective view omitting the yoke 4 shown in FIG. 2 (a), and FIG. 4 (b) is a front view omitting the yoke 4 shown in FIG. 2 (b).

  The lens drive device 101 according to the first embodiment of the present invention has a rectangular parallelepiped appearance as shown in FIG. 2 and FIG. 3, and as shown in FIG. 1 and FIG. The lens holding member 2, the drive mechanism MK for moving the lens holding member 2 up and down along the optical axis direction JD (Z direction shown in FIG. 2), and the lens holding member 2 are supported movably in the optical axis direction JD. A plate spring 6 and a stationary side member RG to which the plate spring 6 is fixed are configured. In addition, the lens drive device 101 according to the first embodiment of the present invention has a terminal 7 for electrical connection with the outside.

  Further, in the lens drive device 101 according to the first embodiment of the present invention, as shown in FIG. 1, the drive mechanism MK doubles as an octagonal annular coil 3 and a rectangular box-like outer case. And the four magnets 5 disposed to face the four sides of the coil 3. Further, as shown in FIG. 1, the plate spring 6 is disposed between the upper plate spring 16 disposed between the lens holding member 2 and the yoke 4, and between the lens holding member 2 and the base member 18. And two lower leaf springs (26A, 26B). The stationary member RG is mainly composed of a base member 18 in which the terminals 7 shown in FIG. 1 are embedded.

  In the lens driving device 101, a lens body (not shown) in which a lens is held is fixed to the lens holding member 2 and mounted on a substrate on which an imaging element (not shown) is mounted. The lens driving device 101 is energized in the coil 3 by the power supply from the substrate, and the lens holding member 2 disposed above the imaging device is electromagnetically directed by the electromagnetic force generated by the driving mechanism MK. 2) to move along the direction Z). That is, the lens driving device 101 moves the lens of the lens body in a direction away from the image pickup element to enable macro photography, and moves the lens of the lens body in a direction close to each other to enable infinity shooting. . The optical axis direction JD is along the central axial direction of the cylindrical lens body (lens barrel).

  Next, each component of the lens drive device 101 will be described in detail using the drawings. First, the lens holding member 2 and the drive mechanism MK will be described. Fig.5 (a) is an upper perspective view of the lens holding member 2, FIG.5 (b) is an upper perspective view which shows the state by which the coil 3 was wound by the lens holding member 2 of Fig.5 (a). . 6 (a) is a lower perspective view of the lens holding member 2, and FIG. 6 (b) is a lower perspective view showing a state in which the coil 3 is wound around the lens holding member 2 of FIG. 6 (a). . 7 (a) is a side view of the lens holding member 2 viewed from the X2 side shown in FIG. 5 (a), and FIG. 7 (b) is an enlarged side view of the R portion shown in FIG. 7 (a). FIG. 7C is a lower perspective view of FIG. 7B as viewed from the lower side. FIG. 8 (a) is a lower perspective view of the lens holding member 2 shown in FIG. 6 (a) as viewed from the X2 side, and FIG. 8 (b) is a perspective view of the lens holding member 2 shown in FIG. Fig. 3 is a lower perspective view showing a state in which 3 is wound. 9 (a) is an enlarged lower perspective view of a portion Q shown in FIG. 8 (b), and FIG. 9 (b) is an enlarged lower perspective view of a portion P shown in FIG. 6 (b). FIG. 10 (a) is a bottom view in which the terminal 7 (including a connection member 57 described later) and the base member 18 are omitted, and FIG. 10 (b) is a lower plate spring 26A further downward in FIG. It is the bottom view which abbreviate | omitted the side leaf | plate spring 26B and the lens holding member 2. FIG.

  First, the lens holding member 2 of the lens drive device 101 will be described. The lens holding member 2 is manufactured by injection molding using a synthetic resin such as liquid crystal polymer (LCP), etc., and as shown in FIG. 5 and FIG. A cylindrical portion 12 having an inner peripheral surface and an outer peripheral surface, and a ridge portion 52 formed on the lower side (the Z2 direction side shown in FIG. 7A) which is one end side in the optical axis direction JD Mainly composed.

  First, as shown in FIG. 5, the cylindrical portion 12 of the lens holding member 2 is provided with a screw groove on the inner peripheral surface, and a lens body (not shown) is engaged and mounted. Further, in the cylindrical portion 12, a pedestal portion 12d having two concave depressions is provided opposite to the other end side (upper end side which is the Z1 direction side shown in FIG. 5) located at the upper portion thereof. (Two places in the X direction shown in FIG. 5). As shown in FIG. 4A, the inner portion (specifically, a first portion 16a described later) of the upper leaf spring 16 is placed on the pedestal portion 12d.

  Further, as shown in FIG. 5, four coil support portions 12 j for supporting the coil 3 from the inside are provided equally in four directions on the outer peripheral surface of the cylindrical portion 12. Further, as shown in FIG. 5, four ridges 12h (see FIG. 7A) projecting radially outward are formed at the upper end side of the coil support 12j, as shown in FIG. It is done. Then, as shown in FIG. 5B, the coil 3 (specifically, the winding portion 13 to be described later) is supported by the coil support portion 12j so as to be sandwiched between the collar portion 12h and the collar portion 52, The outer peripheral surface side of the lens holding member 2 is wound in an octagonal shape.

  Next, the collar-like portion 52 of the lens holding member 2 protrudes radially outward from the outer periphery (peripheral surface) on one end side (the lower end side which is the Z2 direction side shown in FIG. It is formed. As described above, the coil 3 is disposed on one surface side (upper surface side) of the bowl-like portion 52.

  As shown in FIGS. 5 and 6, the ridge-like portion 52 penetrates one surface side (Z1 direction side shown in FIG. 5) and the other surface side (Z2 direction side shown in FIG. 5) of the ridge-like portion 52. Two notches 52k are formed facing each other. As shown in FIGS. 6 (b) and 8 (b), the cutout 52k includes the winding start side and the winding end side portion of the coil 3 (specifically, the insertion portion of the extension portion 33 described later) 33k) is inserted.

  Further, as shown in FIGS. 7 and 8, the collar-like portion 52 is provided with an elastic deformation portion 62 formed to close a part of the notch 52 k, and in the first embodiment of the present invention, , And integrally formed with the bowl-like portion 52. Thus, when forming the lens holding member 2 by injection molding, the elastically deformable portion 62 can be simultaneously formed without using a separate part, so the elastically deformable portion 62 can be easily manufactured.

  As shown in FIGS. 7B and 7C, the elastically deformable portion 62 has a thin portion 62 q that is thinner than the ridge 52 and a thickness dimension toward the ridge 52. A thick connecting portion 62r is provided, and the connecting portions 62r are provided so as to be located on adjacent two sides crossing each other, and are connected to the two sides of the thin portion 62q, and the ridge portion 52 Connected to Thereby, the thin-walled portion 62 q formed thin can be reliably supported.

  On the other surface side (lower surface side) of the bowl-like portion 52, as shown in FIG. 6 and FIG. 8, two square convex holding members which project from the other surface (lower surface) in the optical axis direction JD (downward) Part (protrusion part) 72, six convex part 2t of round convex shape, and a jetty part 82 formed of three side wall parts (inner side wall part 82u, outer side wall part 82v, side wall part 82w) It is provided.

  As shown in FIG. 6B and FIG. 8B, two holding portions 72 are provided corresponding to the winding start and the winding end of the coil 3. A part of both ends of the extension portion 33) is tangled and held (see FIG. 9). In order to make the description easy to understand, as shown in FIG. 10 (b), the holding portion 72 holding a part of the coil 3 on the winding start side of the coil 3 is taken as a holding portion 72A. The holding portion 72 holding a part of the coil 3 on the side will be described below as the holding portion 72B.

  As shown in FIG. 10A, three protruding portions 2t are provided corresponding to each of the lower plate spring 26A and the lower plate spring 26B, and the lower plate spring is provided in the protruding portion 2t. The inside portions (specifically, the third portions 26c described later) of the lower leaf spring 26B are mounted and fixed. In addition, since fixation of the inner side part of lower side leaf | plate spring 26A and lower side leaf | plate spring 26 is performed by heat | fever crimping the projection part 2t, in FIG. 6 thru | or 9 and FIG. 10 (a), projection part 2t Is illustrated with the tip deformed after heat crimping.

  The jetty portion 82 is provided at an opposing portion which is spaced apart and opposed in the optical axis direction JD from the inner portion of the plate spring 6 (lower plate spring 26A, lower plate spring 26B) (see FIG. 12 described later) As shown in 9, the inner side wall 82u located on the center side of the lens holding member 2, the outer side wall 82v located on the outer side facing the inner side wall 82u, and the one side provided with the holding portion 72 It is comprised from the side wall part 82w located between the inner side wall part 82u and the outer side wall part 82v. The other side of the jetty portion 82 separated from the holding portion 72 is an open portion 82z in which the wall portion is cut away. A space surrounded by three side wall portions (inner side wall portion 82u, outer side wall portion 82v, side wall portion 82w) is a housing portion 82s. In the first embodiment of the present invention, since the jetty portion 82 is formed at a position adjacent to the holding portion 72, the side wall of the holding portion 72 is suitably used as the side wall portion 82w of the jetty portion 82. Therefore, at a position adjacent to the holding portion 72, the housing portion 82s formed of the jetty portion 82 is provided in a state of being adjacent thereto.

  Next, the drive mechanism MK of the lens drive device 101 will be described. As shown in FIG. 10 (b), the drive mechanism MK includes a coil 3 wound in an annular shape with an octagonal angle, a rectangular box-shaped yoke 4 serving as an outer case, and a coil 3. And four magnets 5 disposed to face the four sides. The driving mechanism MK generates driving force (thrust) from the current flowing through the coil 3 and the magnetic field generated from the magnet 5 to move the lens holding member 2 up and down along the optical axis direction JD.

  First, the coil 3 of the drive mechanism MK will be described. As shown in FIG. 5B, the coil 3 is located between one end (lower end) and the other end (upper end) in the optical axis direction JD (Z direction shown in FIG. 2) of the lens holding member 2. A conductive wire is wound around the outer periphery, and as shown in FIG. 1, a winding portion 13 formed by winding with an octagonal angle, and ends on both sides of the winding portion 13 And an extending portion 33 connected to the portion. In the coil 3 represented by FIG. 1 and FIG. 5 (b), the conductive wire may cover the surface with the insulating member, and the detailed winding of the conductive wire in the winding portion 13 may be performed. The state is shown omitted.

  Next, each component of the coil 3 will be described in detail, along with a method of winding the wire of the coil 3 around the lens holding member 2. In order to make the description easy to understand, as shown in FIG. 10B, an extension connected to the end of the winding portion 13 located on the inner peripheral side of the winding portion 13 at the winding start side of the coil 3 The portion 33 is an extension portion 33A, and the extension portion 33 connected to the end of the winding portion 13 located on the outer peripheral side of the winding portion 13 at the winding end side of the coil 3 is an extension portion 33B. Do.

  First, as shown in FIG. 9, the extension 33 (33A, 33B) of the coil 3 has a winding portion 33m wound around the holding portion (projection) 72 (72A, 72B) and an inner bottom surface A connecting portion 33c extending opposite to the facing portion), and an inserting portion 33k which is inserted into the notch 52k and extends to one surface side and the other surface side of the hook-like portion 52. It is configured.

  Then, when starting to wind the wire of the coil 3, the extension 33 A of the coil 3 is entangled with the holding portion 72 A of the lens holding member 2. In the example shown in FIG. 9A, a part of the wire of the coil 3 is wound around the holding portion 72A for three turns. As a result, the winding portion 33m is formed in the holding portion 72A, and a part of the extension portion 33A is held by the holding portion 72A.

  Next, the wire is drawn out from the winding portion 33m in which the wire is entangled, and the wire is wound around the outer periphery of the lens holding member 2. At that time, as shown in FIG. 9A, the wire drawn out from the winding portion 33m faces the inner bottom surface (opposite portion) of the housing portion 82s, and the open portion 82z is cut out of the wall portion Is inserted. Furthermore, the wire extends from the other surface side of the collar portion 52 through the notch 52k of the collar portion 52 to one surface side (the winding portion 13 side of the coil 3) of the collar portion 52. As a result, a portion opposed to the jetty portion 82 (opposite portion) and the inner bottom surface (opposite portion) of the housing portion 82s is the connection portion 33c of the extension portion 33A, and the portion inserted into the notch 52k extends It is an insertion portion 33k of the portion 33A.

  Further, when the insertion portion 33k of the extension portion 33A extends to the winding portion 13 side of the coil 3, as shown in FIG. 9A, the insertion portion 33k abuts on the elastic deformation portion 62 of the lens holding member 2. It is configured. As a result, when a strong impact is applied to the lens driving device 101 due to a drop or the like, the extending portion 33A of the coil 3 is pressed against the elastically deformable portion 62 of the lens holding member 2. Therefore, the elastically deforming portion 62 elastically deforms to absorb the impact applied to the extending portion 33A. As a result, the extension 33A can be hardly cut at the edge of the notch 52k, and the lens drive device 101 can be provided in which the coil 3 is not easily broken.

  Furthermore, in the first embodiment of the present invention, since the extension portion 33A provided in contact with the elastically deformable portion 62 is connected to the end of the winding portion 13 positioned on the inner peripheral side of the winding portion 13 And the bending angle at the edge portion of the notch 52k as compared with the case of the other extension 33B (the extension 33B connected to the winding end of the coil 3) located on the outer peripheral side of the winding 13 Is getting narrower. For this reason, the force at which the extension portion 33A on the winding start side of the coil 3 abuts on the edge portion of the notch 52k becomes stronger, so by providing the elastically deformable portion 62 in this portion, the edge portion of the notch 52k It is possible to more effectively alleviate the application of force to the extension portion 33A. As a result, even when a strong impact is applied to the lens driving device 101 due to a drop or the like, the extension 33A can be made more difficult to be cut at the edge of the notch 52k.

  Further, as described above, as shown in FIG. 9A, the thin portion 62 q of the elastically deformable portion 62 is a connecting portion 62 r formed at two positions adjacent to each other and crossing each other. Even if the strong impact is applied to the lens driving device 101 by dropping etc. and the extension 33A of the coil 3 is strongly pressed against the elastically deformable portion 62, the thin portion 62q has two sides (connected It can be supported by the part 62r) to receive an impact. As a result, it is possible to prevent the thin portion 62 q of the elastically deformable portion 62 from breaking and falling off from the hook-like portion 52. In particular, in the first embodiment of the present invention, since the thin portion 62 q is connected to the brim portion 52 by the connecting portion 62 r whose thickness dimension changes as it goes to the brim portion 52 side, The stress applied to the root of the thin portion 62 q is dispersed when a strong impact is applied, as compared with the embodiment in which the dimension is sharply changed, and the thin portion 62 q is more difficult to break.

  Next, the wound portion 13 of the coil 3 wound around the outer periphery of the lens holding member 2 is disposed at a position surrounding the periphery of the cylindrical portion 12 of the lens holding member 2 as shown in FIG. In a state of being supported from the inside by the coil support portion 12j (see FIG. 5A), one portion of the coil 3 is sandwiched between the collar portion 12h and the collar portion 52. It is fixed to the side (upper surface side). Then, since the inner peripheral surface of the winding portion 13 of the coil 3 is isotropically supported by the coil support portion 12j in a well-balanced manner, the lens in a state where the central axis of the coil 3 and the central axis of the lens holding member 2 coincide. It is held by the holding member 2. As a result, the optical axis of the lens of the lens held by the lens holding member 2 and the central axis of the lens holding member 2 can easily be made to coincide with each other.

  Finally, when the winding of the wire around the outer periphery of the lens holding member 2 is completed, the wire of the coil 3 (the extended portion 33B connected to the end on the winding end side of the winding portion 13) is shown in FIG. As shown, it is pulled out from the one surface side of the bowl-like part 52 to the other face side of the bowl-like part 52 through the notch 52 k of the bowl-like part 52. The extension portion 33B (wire) is inserted into the open portion 82z of the jetty portion 82, and is extended so as to face the inner bottom surface (opposite portion) of the housing portion 82s. Be involved in In the example shown in FIG. 9 (b), three turns are wound around the holding portion 72B. Thus, the portion inserted into the notch 52k is the insertion portion 33k of the extending portion 33B, and the portion facing the inner bottom surface (opposing portion) of the jetty portion 82 (opposing portion) and the accommodating portion 82s extends It is the connection portion 33c of the portion 33B. Further, the winding portion 33m is formed in the holding portion 72B, and a part of the extension portion 33B is held by the holding portion 72B.

  In the lens holding member 2 and the coil 3 configured as described above, on the other side apart from the holding portion 72 (72A, 72B), an open portion 82z in which the wall portion of the jetty portion 82 is cut out is formed The extension portion 33 (connection portion 33c) of the coil 3 is inserted through the open portion 82z. Therefore, even if the housing 82s surrounded by the jetty portion 82 is provided, interference between the jetty portion 82 and the extension portion 33 can be avoided, and the opposing portion of the lens holding member 2 and the plate spring 6 can be prevented. The distance to the inner part of the can be kept narrow. This can suppress the lens drive device 101 from becoming large in the optical axis direction JD.

  Next, the yoke 4 of the drive mechanism MK will be described. The yoke 4 is manufactured by punching or drawing a plate material made of a soft magnetic material such as iron or the like, and as shown in FIG. 1, the outer shape is formed in a box shape having a storage portion 4s. The yoke 4 has a rectangular annular outer yoke 4A formed on the outside, a flat top surface 4B provided continuously with the upper end (the Z1 side shown in FIG. 1) of the outer yoke 4A, and an upper surface It is configured to have four inner yokes 4C extended downward (in the Z2 direction shown in FIG. 1) from a part of the portion 4B. Further, at four corners where the inner yoke 4C is formed, step portions 4D located below the upper surface portion 4B are provided. The yoke 4 configured in this manner accommodates the coil 3 and the magnet 5 in the housing portion 4s as shown in FIG. 10B, and is engaged with the base member 18 as shown in FIG. The outer shape is configured together with the member 18.

  As shown in FIGS. 3 (a) and 10 (b), the inner yoke 4C of the yoke 4 is formed in an arc shape in plan view so as to face the four corners of the outer yoke 4A, etc. It is arranged at intervals. Further, although not shown in detail, when the lens drive device 101 is assembled, each of the inner yokes 4C is disposed along the outer periphery of the cylindrical portion 12 of the lens holding member 2, and It is arrange | positioned facing the inner peripheral surface of 3. Furthermore, as shown in FIG. 10 (b), each of the inner yokes 4 </ b> C is disposed at a position opposed to each of the magnets 5 with the coil 3 interposed therebetween. When the yoke 4 is manufactured by drawing, since the inner yoke 4C of the yoke 4 is arc-shaped, drawing can be easily performed. For this reason, the accuracy of the shape of the inner yoke 4C of the yoke 4 and the position of arrangement can be improved.

  Finally, the magnet 5 of the drive mechanism MK will be described. The magnet 5 has a trapezoidal cross-sectional shape as shown in FIG. 1 and has a flat plate-like outer shape, and the four magnets 5 are positioned outside the coil 3 as shown in FIG. 10 (b) And are equally distributed at the four corners of the yoke 4. Further, the two inclined outer side surfaces of the trapezoidal shape of the magnet 5 are shaped along the outer yoke 4A. For this reason, when assembling the lens drive device 101, these two outer side surfaces can be pressed against the outer yoke 4A, and the magnet 5 can be easily positioned. Then, although not shown, the magnet 5 is fixed to the yoke 4 with an adhesive so as to sandwich a part of the plate spring 6 (upper plate spring 16) with the step 4D of the yoke 4. It is done.

  Next, the leaf spring 6 and the stationary member RG of the lens drive device 101 will be described. 11 is a view for explaining the plate spring 6, and FIG. 11 (a) is a top view of the upper plate spring 16, and FIG. 11 (b) is an upper surface of the lower plate spring 26A and the lower plate spring 26B. FIG. FIG. 12 is a diagram for explaining a connection state of the plate spring 6 (lower side plate spring 26A) and the coil 3. FIG. 12 (a) is an enlarged bottom view of the S portion shown in FIG. 12 (b) is an enlarged side view of the plate spring 6 (lower plate spring 26A), the coil 3 and the lens holding member 2 when the portion S shown in FIG. 10 (a) is viewed from the X2 side. In FIG. 12, the conductive adhesive CA is shown by cross hatching in order to make the description easy to understand. FIG. 13 is a view for explaining the base member 18 of the fixed side member RG, and FIG. 13 (a) is a top perspective view of the base member 18, and FIG. 13 (b) is a lower plate on the base member 18. It is an upper perspective view which assembled spring 26A and lower side leaf spring 26B.

  First, the plate spring 6 of the lens driving device 101 is made of a metal plate mainly made of a copper alloy, and is disposed between the lens holding member 2 and the yoke 4 as shown in FIG. An upper leaf spring 16 and two lower leaf springs (26A, 26B) disposed between the lens holding member 2 and the base member 18 are provided. Then, the lens holding member 2 and the plate spring 6 (upper plate spring 16, lower plate spring 26A, lower plate spring 26B) are engaged, and the lens holder 2 is in the optical axis direction JD (Z direction shown in FIG. 2) The lens holding member 2 is supported in the air so as to be movable to the. The lower leaf spring 26A and the lower leaf spring 26B are electrically connected to both end sides of the coil 3, respectively.

  First, as shown in FIG. 11A, the upper side plate spring 16 of the plate spring 6 has a substantially rectangular shape, and is fixed to the inner side portion fixed to the lens holding member 2 and the fixed side member RG. It is configured to have an outer portion and four elastic arms 16g located between the inner and outer portions. Specifically, the inner part is provided at two opposing positions, and is fixed to the other end side (upper end side) in the optical axis direction JD of the lens holding member 2 in each of the inner parts. And two first portions 16a (a total of four first portions 16a). Further, the outer portion has four second portions 16b held and fixed by the yoke 4 and the magnet 5, and a bar portion 16r connecting the four second portions 16b. Here, the yoke 4 and the magnet 5 function as the fixed side member RG.

  Then, when the upper leaf spring 16 is incorporated into the lens drive device 101, as shown in FIG. 4A, the first portion 16a is placed on the pedestal portion 12d of the lens holding member 2, and the first portion The inner portion of the upper leaf spring 16 is fixed to the lens holding member 2 by fixing the 16 a and the pedestal 12 d with an adhesive. Further, as shown in FIG. 4B, the second portion 16b abuts on the upper surface of the magnet 5, and although not shown, it is held between the second portion 16b and the yoke 4 and the outer portion of the upper leaf spring 16 It will be fixed.

  Further, as shown in FIG. 11A, the upper side plate spring 16 is formed in a substantially line symmetrical shape, and is fixed to the lens holding member 2 at two equal positions of the first portion 16a. In addition, it is fixed to the yoke 4 integrated with the base member 18 at four equal positions of the second portion 16 b. Thus, the upper leaf spring 16 can support the lens holding member 2 in the air with good balance.

  Next, as shown in FIG. 11B, the lower side plate springs (26A, 26B) of the plate spring 6 have a semicircular inner shape, and the lens holding member 2 in the optical axis direction JD An inner portion fixed to one end (lower end), an outer portion fixed to the fixed side member RG, and four elastic arm portions 26g located between the inner portion and the outer portion It is configured.

  Further, as shown in FIG. 11B, the inner portions of the lower leaf springs (26A, 26B) include six third portions 26c engaged with the lens holding member 2 and three third portions 26c. It is configured to have four first connecting portions 26p connecting between each other and a connecting plate portion 26h (see FIG. 12) facing the extending portion 33 of the coil 3.

  When the lower leaf springs (26A, 26B) are incorporated into the lens driving device 101, six projecting portions 2t of the lens holding member 2 shown in FIGS. 6 and 8 are shown in FIG. 11 (b). It is inserted into and fitted in a circular through hole provided in the third portion 26c of the lower leaf spring (26A, 26B). As a result, the inner portions of the lower leaf spring 26A and the lower leaf spring 26B are positioned on the lens holding member 2 and fixed to the lens holding member 2. At this time, the projection 2t of the lens holding member 2 is thermally crimped to fix the lower leaf spring 26A and the lower leaf spring 26B to the lens holding member 2 more reliably.

  Further, as shown in FIG. 12, when the lens driving device 101 is assembled, the connection plate portion 26h of the inner side portion of the lower plate spring (26A, 26B) is a ridge portion 82 (a facing portion of the lens holding member 2). It comes to face with). As a result, one surface (upper surface) (surface on the Z1 direction side shown in FIG. 12B) of the connection plate portion 26h of the inner portion faces the housing portion 82s formed of the jetty portion 82, and the plate spring 6 (bottom A connecting portion 33c of the extending portion 33 of the coil 3 is between the one surface of the inner side portion of the side plate spring 26A and the lower side plate spring 26B and the opposing portion of the lens holding member 2 (the inner bottom surface of the It will extend.

  Further, as shown in FIG. 12A, the connecting plate portion 26h of the inner portion is provided with penetrating portions 26t cut out from both sides at positions facing the open portion 82z of the jetty portion 82. On the end face side having a gap from the winding portion 33m of the coil 3, a U-shaped (semi-circular) notch 26k is provided with the winding portion 33m side open. The penetrating portion 26t is provided at a position where the end edge portions of the inner side wall portion 82u and the outer wall portion 82v of the jetty portion 82 face in plan view, and the wall end face 26e constituting the penetrating portion 26t is this It is provided to overlap the edge. The notch 26k is formed to face the housing 82s so as to face the housing 82s.

Further, when the lower leaf springs (26A, 26B) are assembled to the lens holding member 2, as shown in FIG. 12 (b), the tip of the protrusion constituting the holding portion 72 is the lower leaf spring ( 26A, 26B) from the inner portion downward (FIG. 12B) so as to be positioned on the other surface (surface opposite to the one surface facing the housing portion 82s) which is the lower surface of the connection plate portion 26h (inner portion) In the Z2 direction). Furthermore, a part of the winding portion 33m wound around the protrusion is also located downward from the inner portion (in the Z2 direction shown in FIG. 12B).

  A conductive adhesive in which a conductive filler such as silver particles is dispersed in a synthetic resin in the lower side plate spring (26A, 26B) of the plate spring 6 and the extending portion 33 of the coil 3 configured as described above It is electrically connected by agent CA. Specifically, before the lower leaf spring (26A, 26B) is incorporated into the lens holding member 2, first, the housing 82s surrounded by the ridge portion 82 of the lens holding member 2 is filled with the conductive adhesive CA. Then, the lower leaf springs (26A, 26B) are attached to the lens holding member 2. Then, the protruding portion 2t of the lens holding member 2 is heat-stakingd, and the conductive adhesive CA is thermally cured. In the filling step of the conductive adhesive CA into the housing portion 82s or the heat curing step of the conductive adhesive CA, the lens holding member 2 is turned upside down so that the holding portion 72 (projecting portion) protrudes upward. To be done. Thus, in the first embodiment of the present invention, since the jetty portion 82 is provided at the opposing portion, the conductive adhesive CA having fluidity can be filled in filling the conductive adhesive CA onto the accommodation portion 82s. Can be held at a desired position (accommodating portion 82s). As a result, the connecting portion 33c extending between the facing portion of the lens holding member 2 and the inner portion of the lower leaf spring (26A, 26B) is disposed in the housing portion 82s, and the connecting portion 33c is formed. It can be reliably embedded in the conductive adhesive CA. The conductive adhesive CA is not limited to a thermosetting adhesive, and may be an ultraviolet curable adhesive.

  Thus, the conductive adhesive is provided between the side surface of the binding pin 915 on which the coil end 934 (the end of the coil) is wound as in the conventional example and the surface of the image side spring member 914x (corresponding to the plate spring 6). And the extending portion 33 of the coil 3 between the opposing portion of the lens holding member 2 and the inner portion of the plate spring 6 (the lower plate spring 26A and the lower plate spring 26B). A conductive adhesive CA for electrically connecting the inner portion of the plate spring 6 is provided. For this reason, it is not necessary to provide a winding portion (winding pin 915) for winding the end of the coil 3 longer and securing an electrical connection, or the protrusion height of the winding portion (holding portion 72) There is no need to raise it. By this, the height dimension in the optical axis direction JD of the lens holding member 2 can be reduced, and the height dimension in the optical axis direction JD of the lens drive device 101 can be reduced.

  Further, since the conductive adhesive CA is provided and connected between the opposing portion of the lens holding member 2 disposed opposite to the inner portion of the plate spring 6 (the lower plate spring 26A and the lower plate spring 26B), Even when a strong impact due to a drop or the like is applied to the lens driving device 101 and the plate spring 6 (the lower plate spring 26A, the lower plate spring 26B) is deformed, the conductive adhesive CA can be hardly peeled off. That is, in the configuration as in the conventional example, the side surface of the binding pin 915 on which the conductive adhesive 955 or the like is wound by the coil end 934 (the end of the coil) and the surface of the image side spring member 914x (leaf spring 6) When the image-side spring member 914x is deformed when a strong impact due to a drop or the like is applied to the lens driving device 901, the two members (the end portion of the coil and the plate A force acts to expand the angle of the spring 6), and the conductive adhesive 955 or the like is easily peeled from the coil end 934 or the image side spring member 914x. In order to solve such a problem, the lens driving device 101 according to the first embodiment of the present invention has a force in the vertical direction (the Z direction shown in FIG. 2) that peels off the conductive adhesive CA from the plate spring 6 or the like. Since it is hard to act, this peeling can be prevented, and the electrical connection between the coil 3 and the plate spring 6 can be reliably ensured.

  Further, since the extension portion 33 and the inner portion of the plate spring 6 are electrically connected by the conductive adhesive CA in which the conductive filler is dispersed in the synthetic resin, the case of firmly fixing and connecting by the solder Since the elasticity of the conductive adhesive CA layer of the connecting portion is higher than that of the connecting portion, slight movement of the inner portion (the connecting plate portion 26h) of the plate spring 6 is permitted. For this reason, when a tensile force acts on the inner portion, the movable portion of the inner portion can relieve this tensile force. As a result, even when a strong impact is applied to the lens drive device 101 due to a drop or the like, the inner part can be prevented from peeling off, and the connection between the coil 3 and the plate spring 6 can be ensured more reliably. . Furthermore, since the elasticity of the conductive adhesive CA layer in the connection portion is high, slight movement of the extension 33 is also permitted. For this reason, when tensile force acts on the extension part 33, the extension part 33 can be moved, and this tensile force can be relieved. As a result, even when a strong impact is applied to the lens driving device 101 due to a drop or the like, the extension portion 33 can be further hardly cut at the edge of the notch 52k.

  Further, the connecting portion 33c of the extending portion 33 is electrically conductive between the facing portion (inner bottom surface of the housing portion 82s) of the lens holding member 2 and the inner portion (connection plate portion 26h) of the lower plate spring (26A, 26B). Since it is embedded in the adhesive CA, the extension 33 of the coil 3 and the inner portion of the plate spring 6 can be electrically connected reliably by the connection portion 33c.

  In addition, a holding portion 72 is provided adjacent to the jetty portion 82, and includes a protruding portion protruding from one end of the lens holding member 2 in the same direction as the jetty portion 82, and the extension portion 33 of the coil 3 As it is wound, the wound portion 33m of the extension portion 33 can be easily held. Moreover, the conductive adhesive CA is provided between the winding portion 33m of the coil 3 and the inner portion of the plate spring 6 (the lower plate spring 26A and the lower plate spring 26B), and in addition to the connection portion 33c of the coil 3, the conductive adhesive CA is provided. The winding portion 33m can be conductively connected to the plate spring 6 as well. As a result, the area of the extension portion 33 in contact with the conductive adhesive CA can be increased, and conductive connection can be reliably made, and the conductive resistance between the plate spring 6 and the coil 3 can be reduced. .

  Further, in the first embodiment of the present invention, the connection plate portion 26h of the plate spring 6 is formed with a notch 26k facing the housing portion 82s formed by the projection portion 82, and this notch 26k is formed. From this, the conductive adhesive CA is exposed. Therefore, the conductive adhesive CA comes in contact with the end face of the notch 26k, and the electrical connection between the inner portion of the plate spring 6 and the extension 33 of the coil 3 becomes reliable.

  In the case where the housing portion 82s is filled with the conductive adhesive CA and thereafter the plate spring 6 (the lower plate spring 26A and the lower plate spring 26B) is attached to the lens holding member 2, the conductive adhesive CA is used. Even if the filling amount varies, the variation in the amount can be absorbed by the notch 26k. That is, when the amount of the conductive adhesive CA is large, the conductive adhesive CA can flow out to the other surface side of the inner portion (connection plate portion 26h) of the plate spring 6 from the notch 26k. Furthermore, it is possible to confirm whether or not the conductive adhesive CA is properly provided by confirming the portion of the notch 26k.

  Furthermore, as in the first embodiment of the present invention, when the notch 26k is located on the holding portion 72 (side wall 82w) side and is adjacent to the winding portion 33m, the inner portion of the plate spring 6 (connection plate portion 26h) By providing or flowing out the conductive adhesive CA to the other surface side, the extended portion 33 of the coil 3 and the inner portion of the plate spring 6 can be more conductively connected more reliably. Furthermore, the area of the extension portion 33 in contact with the conductive adhesive CA can be made larger, and the conduction resistance between the plate spring 6 and the extension portion 33 of the coil 3 can be made smaller.

  Further, when the housing portion 82s is filled with the conductive adhesive CA and thereafter the plate spring 6 (the lower plate spring 26A and the lower plate spring 26B) is disposed on the lens holding member 2, Since the opened notch 26k is formed in the inner portion (connection plate portion 26h), the conductive adhesive CA is pushed out to the winding portion 33m side, so the end surface of the inner portion (the end surface of the notch 26k Conductive adhesive CA can be reliably provided between the winding portion 33m and the winding portion 33m, and the conduction resistance between the inner portion of the plate spring 6 and the extension portion 33 of the coil 3 is lowered to ensure electrical connection more reliably. It can be connected.

  In addition, the jetty portion 82 is formed such that the distance between the inner side wall portion 82u and the outer side wall portion 82v is narrower on the other side on the open portion 82z side than on the one side on the holding portion 72 (72A, 72B) side. It is done. Therefore, since more conductive adhesive CA can be provided on the winding portion 33m side, the conduction resistance between the coil 3 and the plate spring 6 can be further reduced. Moreover, since the open portion 82z side is formed to be narrow, and the extension portion 33 (connection portion 33c) is inserted into the open portion 82z, the conductive adhesive CA filled in the housing portion 82s flows out through the open portion 82z. It can be difficult.

  Further, as shown in FIG. 12A, since the penetrating portion 26t is provided in the inner portion at the position facing the open portion 82z (see FIG. 9A), the conductive adhesive CA is temporarily formed. Can move away from the holding portion 72 and flow out of the open portion 82z, the further flow can be stopped by the wall end face 26e constituting the penetrating portion 26t.

  On the other hand, as shown in FIG. 11 (b), the outer portions of the lower leaf springs (26A, 26B) have four fourth portions 26d engaged with the base member 18 and two fourth portions 26d. And two second connecting portions 26 q connecting the two. Needless to say, as shown in FIG. 10A, the outer portion of the lower leaf spring (26A, 26B) has a distance from the center of the lens holding member 2 larger than that of the inner portion, and is outside the inner portion. positioned.

  Then, six projecting portions 18t (see FIG. 13) provided on the upper surface of the base member 18 described later are inserted into the six through holes provided in the fourth portion 26d of the lower plate spring (26A, 26B) It is done and fitted. As a result, the outer portions of the lower leaf spring 26A and the lower leaf spring 26B are positioned on the base member 18, and are fixed to the base member 18 which is the stationary member RG.

  The lower leaf spring 26A and the lower leaf spring 26B are formed in a substantially line-symmetrical shape as shown in FIG. 11B, and four portions of the third portion 26c with respect to the lens holding member 2 are provided. They are connected at symmetrical positions, and are connected to the base member 18 at four equal positions of the fourth portion 26d. Thereby, the lens holding member 2 can be supported in the air with good balance. Therefore, the lens holding member 2 is supported movably in the optical axis direction JD by the plate spring 6 (upper plate spring 16, lower plate spring 26A and lower plate spring 26B) configured as described above.

  Finally, the fixed side member RG of the lens drive device 101 will be described.

  The fixed side member RG of the lens driving device 101 includes the yoke 4 and the magnet 5 for fixing the second portion 16b of the upper plate spring 16, and the base member 18 for fixing the fourth portion 26d of the lower plate spring (26A, 26B). , Is configured. Here, the stationary side member RG of the upper side leaf spring 16 has been described above in the item of the yoke 4 and the magnet 5 which are also the drive mechanism MK, so the description is omitted, and the stationary side member RG of the lower side leaf spring (26A, 26B) Only explain.

  The base member 18 of the fixed side member RG is manufactured by injection molding using a synthetic resin such as liquid crystal polymer (LCP), and as shown in FIG. 1 and FIG. And a circular opening 18k is formed at the center. Further, on the upper surface of the base member 18, six projecting portions 18t protruding upward are provided at four corners. Then, the protruding portion 18t provided on the upper surface of the base member 18 is inserted into the through hole provided in the fourth portion 26d of the lower leaf spring (26A, 26B), and the through hole and the protruding portion 18t It is fitted. At this time, the protruding portion 18t of the base member 18 is thermally crimped to more securely fix the lower leaf spring 26A and the lower leaf spring 26B to the base member 18.

  In the base member 18, as shown in FIGS. 1 and 13, a terminal 7 made of a metal plate using a material such as copper, iron, or an alloy containing them as a main component is insert-molded and embedded. Each of the two electrically isolated terminals 7 (terminals 7A and 7B) is electrically connected to a substrate on which an imaging device (not shown) is mounted, and power can be supplied from the two terminals 7 It is supposed to be. The one terminal 7A of the terminal 7 is electrically connected to the lower plate spring 26A, and the other terminal 7B of the terminal 7 is electrically connected to the lower plate spring 26B. A current can be supplied to the coil 3 from the terminal 7B through the lower leaf spring 26A and the lower leaf spring 26B.

  Further, although not shown in detail, the connecting member 57 made of a metal plate using a material such as copper, iron or an alloy containing them as a main component is also inserted into the base member 18 like the terminal 7. The connecting member 57 is molded and embedded, and a part of the connecting member 57 is exposed at four corners of the yoke 4 as shown in FIG. Then, after the inner wall of the outer yoke 4A of the yoke 4 and the outer peripheral side surface of the base member 18 are combined and positioned, four joints between the connection member 57 of the base member 18 and the four corners of the yoke 4 are welded 4 is fixed to the base member 18.

  The effects of the lens driving device 101 according to the first embodiment of the present invention configured as described above will be collectively described below. In addition, since the lower side leaf spring (26A, 26B) in the first embodiment of the present invention corresponds to the "leaf spring" of the present invention, in the following description, "leaf spring 6" unless otherwise noted. The term "lower plate spring (26A, 26B)" is used.

  The lens drive device 101 according to the first embodiment of the present invention electrically connects the extending portion 33 and the inner portion of the coil 3 between the facing portion of the lens holding member 2 and the inner portion of the plate spring 6. Since the conductive adhesive CA is provided, there is no need to provide a binding portion (entanglement pin 915) for winding the end of the coil 3 longer and securing an electrical connection, or There is no need to increase the protrusion height. By this, the height dimension in the optical axis direction JD of the lens holding member 2 can be reduced, and the height dimension in the optical axis direction JD of the lens drive device 101 can be reduced. Further, since the conductive adhesive CA is provided and connected between the facing portion of the lens holding member 2 arranged in the facing state and the inner portion of the plate spring 6, the strong impact caused by falling etc. Even if it is added to 101, the conductive adhesive CA can be made difficult to peel off.

  In addition, since the connection portion 33c is embedded in the conductive adhesive CA between the facing portion and the inner portion, the extension portion 33 of the coil 3 and the inner portion of the plate spring 6 can be reliably confirmed by the connection portion 33c. Can be conductively connected. Further, since the extending portion 33 of the coil 3 and the inner portion of the plate spring 6 are conductively connected between the facing portion and the inner portion, the protruding portion in which the extending portion 33 is tangled can be entangled Even in the case of a part, it is not necessary to increase its projecting dimension. Therefore, the height dimension of the lens holding member 2 in the optical axis direction JD can be reduced, and the height dimension of the lens driving device 101 in the optical axis direction JD can be reduced.

  In addition, since the conductive adhesive CA for embedding the connection portion 33c is filled in the housing portion 82s formed of the jetty portion 82, the conductive adhesive having flowability when filled with the conductive adhesive CA. CA can be held at a desired position (accommodating portion 82s). For this reason, the connection portion 33c extending between the facing portion of the lens holding member 2 and the connection plate portion 26h of the inner portion is disposed in the housing portion 82s, and the connection portion 33c is made of the conductive adhesive CA. Can be buried securely. As a result, the extending portion 33 of the coil 3 and the inner portion (connection plate portion 26 h) of the plate spring 6 can be more reliably conductively connected.

  Further, on the other side apart from the holding portion 72 provided on one side of the jetty portion 82, an open portion 82z in which the wall portion of the jetty portion 82 is notched is formed. 3 extension part 33 can be penetrated. For this reason, even if the housing portion 82s surrounded by the jetty portion 82 is provided, interference between the jetty portion 82 and the extension portion 33 can be avoided, so that the opposing portion of the lens holding member 2 and the plate spring 6 can The distance to the inner part can be kept narrow. This can suppress the lens drive device 101 from becoming large in the optical axis direction JD. Moreover, since the extension part 33 is penetrated by the open part 82z, it can be made hard to flow out the conductive adhesive CA with which the accommodating part 82s was filled via the open part 82z.

  Further, since the penetrating portion 26t is provided at the inner portion facing the opening portion 82z, the conductive adhesive CA is temporarily moved in a direction away from the holding portion 72 to flow out of the opening portion 82z. Further outflow can be stopped by the end edge which constitutes penetration part 26t.

  In addition, the lens holding member 2 has a holding portion 72 formed of a protruding portion protruding from the one end portion of the lens holding member 2 in the same direction as the jetty portion 82. Since the extending portion 33 of the coil 3 is wound around this protruding portion The winding portion 33m of the portion 33 can be easily held. Moreover, the conductive adhesive CA is provided between the winding portion 33m of the coil 3 and the inner portion of the plate spring 6, and in addition to the connection portion 33c, conductive connection can be made by the winding portion 33m. As a result, the area of the extension portion 33 in contact with the conductive adhesive CA can be increased, and conductive connection can be reliably made, and the conductive resistance between the plate spring 6 and the coil 3 can be reduced. .

  Further, a notch 26k is formed in the connection plate 26h of the plate spring 6 facing the housing 82s formed by the ridge portion 82, and the conductive adhesive CA is exposed from the notch 26k. Therefore, the conductive adhesive CA comes in contact with the end face of the notch 26k, and the electrical connection between the inner portion of the plate spring 6 and the extension 33 of the coil 3 becomes reliable. Further, in the case where the housing portion 82s is filled with the conductive adhesive CA and thereafter the plate spring 6 is attached to the lens holding member 2, even if the filling amount of the conductive adhesive CA varies, this notch portion The variation of the amount can be absorbed by 26k. That is, when the amount of the conductive adhesive CA is large, the conductive adhesive CA can flow out to the other surface side of the inner portion (connection plate portion 26h) of the plate spring 6 from the notch 26k. Furthermore, it is possible to confirm whether or not the conductive adhesive CA is properly provided by confirming the portion of the notch 26k.

  The present invention is not limited to the above embodiment, and can be implemented, for example, as follows, and these embodiments also fall within the technical scope of the present invention.

  FIG. 14 is a view for explaining a modification of the lens drive device 101 according to the first embodiment of the present invention, and FIG. 14 (a) is a schematic view of the modification 1 and the modification 2; (B) is a schematic diagram of the modification 3 and the modification 4, and FIG.14 (c) is a schematic diagram of the modification 5 and the modification 6. FIG. FIG. 15 is a view for explaining a modification of the lens driving device 101 according to the first embodiment of the present invention, and is a schematic view of the seventh modification and the eighth modification.

<Modification 1>
In the first embodiment, the shape of the jetty portion 82 of the lens holding member 2 is formed to be narrow on the side of the open portion 82z, but is not limited to this. For example, a rectangular jetty portion C 82 as shown in FIG. 14A may be used. At that time, it is better to provide a new side wall portion C82w on the side of the open portion C82z and cut out the side wall portion C82w to provide a narrow open portion C82z of the opening.

<Modification 2>
Although the side wall of the holding portion 72 (72A, 72B) is suitably used as the side wall portion 82w of the jetty portion 82 of the lens holding member 2 in the first embodiment, the present invention is not limited to this. For example, as shown in FIG. 14A, a new side wall portion C82x may be provided on the holding portion 72 side, and the holding portion 72 may also be provided at a position separated from the side wall portion C82x (Modification 2).

<Modification 3>
In the said 1st Embodiment, although it comprised in the shape of substantially rectangular shape (plan view) as the accommodating part 82s, it does not restrict to this. For example, it may be a substantially circular (elliptical) housing portion D82s surrounded by a curved jetty portion D82 as shown in FIG. 14 (b).

<Modification 4>
In the first embodiment, the holding portion 72 (72A, 72B) is disposed adjacent to the substantially rectangular housing portion 82s. However, the present invention is not limited to this. For example, as shown in FIG. 14 (b), the holding portion D72 may be partially inserted into the accommodation portion D82s. In this case, although the concave portion is formed in the housing portion D82s, it can be said that the housing portion D82s having the concave portion is in a state of being adjacent to the holding portion D72.

<Modification 5>
In the said 1st Embodiment, although it was the accommodating part 82s adjacent to the open part 82z which the wall part was notched, it does not restrict to this. For example, as shown in FIG. 14C, the housing portion E82s may be surrounded by a jetty portion E82 formed in an annular shape.

<Modification 6>
In the first embodiment, the holding portion 72 (72A, 72B) is disposed adjacent to the substantially rectangular housing portion 82s. However, the present invention is not limited to this. For example, as shown in FIG. 14C, the holding portion E72 may be disposed in the housing portion E82s. Such a form is also included in the concept that the holding portion E72 and the housing portion E82s are provided adjacent to each other in the present invention because the holding portion E72 is adjacent to the inside of the housing portion E82s. I assume.

<Modification 7>
In the first embodiment, the shape of the notch portion 26k in the connection plate portion 26h of the lower plate spring (26A, 26B) is a semicircular shape, but it is not limited to this. For example, a rectangular notch C26k as shown in FIG. 15 may be used.

<Modification 8>
In the first embodiment, the penetrating portion 26t of the connection plate portion 26h of the lower plate spring (26A, 26B) is notched from both sides, but the present invention is not limited to this. For example, a through hole C26t having a rectangular hole shape as shown in FIG. 15 may be used.

<Modification 9>
In the first embodiment, the holding portion 72 is constituted by the projecting portion which protrudes from the one end portion of the lens holding member 2 (the collar portion 52) in the optical axis direction JD. However, the present invention is not limited thereto. For example, it may be a projecting portion that protrudes laterally, or a hook portion that does not project.

<Modification 10>
In the first embodiment, the lower leaf springs (26A, 26B) are divided into two to form a pair, and the lower leaf springs (26A, 26B) are electrically connected to the extending portions 33 (33A, 33B) of the coil 3, It is not limited to this. For example, in a lens driving device with a shake correction function, the upper plate spring is divided into two and electrically connected to each of the extension portions 33 (33A, 33B) of the coil 3 by the conductive adhesive CA. But it is good.

  The present invention is not limited to the above embodiment, and can be modified as appropriate without departing from the scope of the object of the present invention.

DESCRIPTION OF SYMBOLS 2 Lens holding member 3 Coil 52 Collar-like part 52k Notch part 62 Elastic deformation part 62q Thin part 62r Connecting part 72, 72A, 72B, D72, D72 Holding part 82, C82, D82, E82 Jetty part 82s Housing part 82z Open part 13 Winding portion 33, 33A, 33B Extension portion 33c Connection portion 33m Winding portion 4 Yoke 5 Magnet 6 Leaf spring (26A, 26B lower leaf spring)
26c third part (inner part)
26d 4th part (outside part)
26h Connection plate (inner part)
26k, C26k notch 26t, C26t penetration part MK drive mechanism RG fixed side member CA conductive adhesive JD optical axis direction 101 lens drive device

Claims (9)

A cylindrical lens holding member capable of holding the lens body;
A leaf spring having an inner portion and an outer portion, the inner portion being fixed to the lens holding member, and the lens holding member being movably supported in the optical axis direction;
A stationary side member to which the outer portion of the leaf spring is fixed;
A drive mechanism configured to include at least a magnet and a coil for moving the lens holding member along an optical axis direction ;
In the lens driving device, the coil includes a winding portion formed by winding a conductive wire and an extension portion connected to an end of the winding portion .
The inner portion of the leaf spring is fixed to one end of the lens holding member in the optical axis direction,
The one end of the front Symbol lens holding member includes a facing portion facing spaced in the inner portion and the optical axis direction, and a holding portion partially is held in the extending portion,
The extension portion is
The winding portion disposed on an outer peripheral surface located between the one end and the other end in the optical axis direction of the lens holding member;
A winding unit wound around the holding unit;
Connection extending between the
A conductive adhesive for electrically connecting the connecting portion and the inner portion is provided between the facing portion and the inner portion, and the connecting portion is embedded in the conductive adhesive. Lens driving device characterized in that The lens drive device according to claim 1 , wherein a part of the winding portion is conductively connected to the inner portion by the conductive adhesive . Wherein the facing portion, contents portions yield is provided, the lens drive according to claim 1 or 2, wherein the conductive adhesive to embed the connecting portion to the receiving portion, characterized in that it is filled apparatus. A cylindrical lens holding member capable of holding the lens body;
A leaf spring having an inner portion and an outer portion, the inner portion being fixed to the lens holding member, and the lens holding member being movably supported in the optical axis direction;
A stationary side member to which the outer portion of the leaf spring is fixed;
A drive mechanism configured to include at least a magnet and a coil for moving the lens holding member along an optical axis direction;
The inner portion of the leaf spring is fixed to one end of the lens holding member in the optical axis direction,
The coil is disposed on an outer peripheral surface located between the one end and the other end in the optical axis direction of the lens holding member, and a winding part formed by winding a conductive wire. A lens driving device having an extending portion connected to an end of the winding portion;
The one end portion of the lens holding member has an opposing portion facing the inner portion with a distance in the optical axis direction and facing each other, and a holding portion in which a part of the extension portion is held,
A conductive adhesive is provided between the facing portion and the inner portion to electrically connect the extension portion and the inner portion,
The extending portion has a connecting portion extending between the facing portion and the inner portion of the leaf spring,
The connection is embedded in the conductive adhesive;
An accommodating portion is provided in the facing portion, and the electrically conductive adhesive for embedding the connection portion is filled in the accommodating portion,
The holding portion includes a protruding portion which protrudes from the one end portion of the lens holding member to the opposite side to the other end portion at a position adjacent to the housing portion.
The extension portion has a winding portion wound around the protrusion.
The conductive adhesive is provided between the winding portion and the inner portion,
The inner portion has one surface opposite to the housing portion and the other surface opposite to the one surface,
The protruding portion protrudes from the inner portion so that the tip end thereof is positioned on the other surface side, and the winding portion has a clearance from an end surface of the inner portion located opposite to the housing portion. Provided to face each other,
Features and, Relais lens driving device in that the conductive adhesive from the gap is exposed. The housing portion is formed of a jetty portion projecting from the opposing portion to the inner portion side,
The jetty portion has a wall portion provided around the accommodation portion,
The holding portion is provided on one side of the jetty portion,
On the other side of the jetty part separated from the holding part, an open part in which the wall part is cut out is formed,
The lens driving device according to claim 3 or 4, characterized in that the extending portion to the opening portion is inserted. The penetration part which prevents that the conductive adhesive is moved in the direction away from the holding part is provided in the inside part in the position which counters the opening part, The claim 5 characterized by the above-mentioned. Lens drive device. The holding portion includes a protruding portion which protrudes from the one end portion of the lens holding member to the opposite side to the other end portion at a position adjacent to the housing portion.
The lens driving device according to claim 3, wherein the conductive adhesive is provided between the winding portion and the inner portion. The lens drive device according to any one of claims 3 to 7, wherein a notch for exposing the conductive adhesive is formed in the inner portion located opposite to the housing portion. . The notch portion is a lens driving device according to claim 8, front Symbol winding portion side, characterized in that it is open.