JP2021051183A - Lens driving device and camera module - Google Patents

Abstract

To provide a lens driving device capable of suppressing the generation of peeling scraps of a coating layer in a conductor wire constituting a coil.SOLUTION: A lens driving device 101 includes: a lens holding member 2; a coil 3; and an upper plate spring 16 and a lower plate spring 26 which support the lens holding member 2 so as to be movable in an optical axis direction. The coil 3 includes: a winding part 13 constituted of a conduction wire wound around the outer periphery of the lens holding member 2; and an extension part 33B which extends from a winding end part 13 WE of the winding part 13 and is connected to the lower plate spring 26B. The conductor wire has a metal wire MW and an insulating coating layer CL covering the metal wire MW. The extension part 33B extends so as to intersect with a conduction wire portion located at the outermost periphery of the winding part 13 using the winding end part 13 WE as a starting point.SELECTED DRAWING: Figure 15

Description

The present disclosure relates to a lens driving device mounted on, for example, a portable device with a camera, and a camera module including the lens driving device.

Conventionally, a lens driving device including a lens holding member and a coil arranged on the outer periphery of the lens holding member is known (see Patent Document 1). In this device, the conducting wire constituting the coil has a conductive metal wire and an insulating coating layer for coating the metal wire. The coating layer has a two-layer structure consisting of an insulating layer that covers the metal wire and a fusion layer arranged around the insulating layer. Then, in the two lead wire portions adjacent to each other when wound around the outer circumference of the lens holding member, the respective fusion layers are heat-sealed to each other.

Further, the plurality of conducting wire portions forming the outermost layer of the coil are wound in order from the subject side (upper side) to the image sensor side (lower side) in the direction along the optical axis. The lowermost lead wire portion of the plurality of lead wire portions is configured to be relatively easily peeled off from the upper adjacent lead wire portion when pulled downward. That is, the wire portion located at the lowermost side of the plurality of wire portions constituting the outermost layer does not intersect with the other wire portions constituting the outermost layer when pulled downward, and other wire wires. It is configured to be peeled off from the part. This is to prevent excessive tension from acting on the extending portion, which is the terminal portion of the lead wire extending from the winding end portion of the coil.

International Publication No. 2018/181168

However, in the above-mentioned lens driving device, the wire portion located at the lowermost side among the plurality of wire wire portions constituting the outermost layer is separated from the other wire wire portions constituting the outermost layer when an impact such as dropping is received. Further, it may be peeled off, and peeling dust of the coating layer may be generated. Then, the peeling dust of the coating layer may adhere to the image pickup device as a foreign substance and cause an image defect.

Therefore, it is desirable to provide a lens driving device capable of suppressing the generation of peeling dust of the coating layer in the conducting wire constituting the coil.

The lens driving device according to the embodiment of the present invention includes a support member, a lens holding member capable of holding a lens body, a coil held by the lens holding member, a magnet facing the coil, and the support member. In a lens driving device provided with a pair of leaf springs arranged so as to connect the lens holding member and movably supporting the lens holding member in the optical axis direction, the coil is wound around the outer periphery of the lens holding member. A winding portion composed of the wound wire, a first extending portion extending from the winding start portion of the winding portion and connected to one of the leaf springs, and a winding portion extending from the winding end portion of the winding portion. It has a second extending portion that is present and is connected to the other leaf spring, and the conducting wire has a metal wire and an insulating coating layer that covers the metal wire, and the second extending portion. Extends from the winding end portion as a base point so as to intersect with the conducting wire portion located at the outermost periphery of the winding portion.

The above-mentioned lens driving device can suppress the generation of peeling dust of the coating layer.

It is an exploded perspective view of the lens driving device. It is the upper perspective view and the front view of the lens driving device. It is a top view and a bottom view of a lens driving device. It is an upper perspective view of the lens driving device in a state where a part of a component is removed. It is an upper perspective view of the lens holding member. It is a lower perspective view of a lens holding member. It is a lower perspective view of a lens holding member. It is an enlarged view of a part of a lens holding member. It is a bottom view of the lens driving device in a state where a part of a component is removed. It is a top view of the upper leaf spring and the lower leaf spring. It is a figure explaining an example of the connection structure of a leaf spring holding member, a yoke, and an upper leaf spring in a lens driving device. It is a figure explaining an example of the connection structure of the lower leaf spring and a coil in a lens drive device. It is an exploded perspective view and the completed perspective view of the base member of a lens driving device. It is a side view and sectional view of the lens holding member which holds a coil. It is sectional drawing of the lens holding member which holds a coil. It is sectional drawing of the conducting wire which constitutes a coil. It is a figure explaining another example of the connection structure of the lower leaf spring and a coil in a lens drive device.

Hereinafter, the lens driving device 101 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the lens driving device 101. FIG. 2A is an upward perspective view of the lens driving device 101, and FIG. 2B is a front view of the lens driving device 101 as viewed from the Y2 side. FIG. 3A is a top view of the lens driving device 101, and FIG. 3B is a bottom view of the lens driving device 101. FIG. 4A is an upward perspective view of the lens driving device 101 with the leaf spring holding member 1 removed. FIG. 4B is an upward perspective view of the lens driving device 101 in a state where the upper leaf spring 16 is further removed.

As shown in FIG. 1, the lens driving device 101 drives the lens holding member 2 capable of holding the lens body (not shown) and the lens holding member 2 to move along the optical axis direction (Z-axis direction). The mechanism MK, the leaf spring 6 that movably supports the lens holding member 2 in the optical axis direction, the fixed side member RG to which the leaf spring 6 is fixed, and the electrical between the external power supply and the lens driving device 101. Includes a metal member 7 that provides a good connection. The lens body is, for example, a tubular lens barrel including at least one lens, and is configured such that its central axis is along the optical axis direction. The optical axis direction includes the direction of the optical axis JD with respect to the lens body and the direction parallel to the optical axis JD.

As shown in FIG. 1, the drive mechanism MK is arranged so as to face the coil 3 wound in an oval ring shape, the yoke 4 as a cover member that also serves as a rectangular box-shaped outer case, and the four corners of the yoke 4. Includes four magnets 5. In the present embodiment, the magnet 5 has a quadrangular prism shape having a trapezoidal bottom surface. The fixed-side member RG includes a leaf spring holding member 1, a yoke 4, and a base member 18 as a support member in which a metal member 7 is embedded. The leaf spring 6 includes an upper leaf spring 16 that connects the lens holding member 2 and the yoke 4, and a lower leaf spring 26 that connects the lens holding member 2 and the base member 18. The lower leaf spring 26 includes a lower leaf spring 26A and a lower leaf spring 26B.

The lens driving device 101 has a substantially rectangular parallelepiped shape and is mounted on a substrate (not shown) on which an image sensor (not shown) is mounted. The camera module is composed of a substrate, a lens driving device 101, a lens body mounted on the lens holding member 2, and an image pickup element mounted on the substrate so as to face the lens body. The coil 3 is connected to the power supply via the lower leaf spring 26, the metal member 7, and the substrate. When a current flows through the coil 3, the drive mechanism MK generates an electromagnetic force along the optical axis direction.

The lens driving device 101 realizes an automatic focus adjustment function by using this electromagnetic force to move the lens holding member 2 along the optical axis direction on the Z1 side (subject side) of the image sensor. Specifically, the lens driving device 101 moves the lens holding member 2 in the direction away from the image sensor to enable macro photography, and moves the lens holding member 2 in the direction closer to the image sensor to enable infinity photography. I have to.

Next, the relationship between the lens holding member 2 and the drive mechanism MK will be described. 5 (A) is an upward perspective view of the lens holding member 2, and FIG. 5 (B) shows a state in which the coil 3 is wound around the lens holding member 2 of FIG. 5 (A). It is an upper perspective view. FIG. 6A is a downward perspective view of the lens holding member 2, and FIG. 6B is a lens holding member 2 showing a state in which the coil 3 is wound around the lens holding member 2 of FIG. 6A. It is a lower perspective view. 7 (A) is a downward perspective view of the lens holding member 2, and FIG. 7 (B) is a lens holding member 2 showing a state in which the coil 3 is wound around the lens holding member 2 shown in FIG. 7 (A). It is a downward perspective view of. 8 (A) is an enlarged view of the portion S shown in FIG. 7 (B), and FIG. 8 (B) is an enlarged view of the portion P shown in FIG. 6 (B). FIG. 9A is a bottom view of the lens driving device 101 in a state where the metal member 7 and the base member 18 are removed, and FIG. 9B is a bottom view in which the lower leaf spring 26 and the lens holding member 2 are further removed. It is a bottom view of the lens driving device 101 in the state of being closed.

In the present embodiment, the lens holding member 2 is manufactured by injecting and molding a synthetic resin such as a liquid crystal polymer (LCP). Specifically, as shown in FIG. 5A, the lens holding member 2 has a tubular portion 12 formed so as to have a through hole along the optical axis direction, and an image sensor side in the optical axis direction ( Includes a flange portion (flange-shaped portion) 52 formed at the end portion on the Z2 side). The tubular portion 12 is formed in a substantially cylindrical shape at the end portion on the subject side (Z1 side) in the optical axis direction.

In the present embodiment, the lens body is configured to be fixed to the inside of the tubular portion 12 by using an adhesive without using a screw fastening structure. However, the tubular portion 12 may be provided with a thread groove on the inner peripheral surface of the cylinder so that the lens body can be mounted by using the screw fastening structure. Further, the tubular portion 12 is provided with four pedestal portions 12d having recesses 12dh on the end surface on the subject side so as to surround the optical axis JD. As shown in FIG. 4A, the inner portion 16i of the upper leaf spring 16 is placed on the pedestal portion 12d.

As shown in FIG. 5A, a coil support portion 12j is provided on the outer peripheral surface of the tubular portion 12 as an outer peripheral wall portion that supports the coil 3 from the inside. In the present embodiment, the coil support portion 12j is formed in an oval ring shape so as to support the oval ring coil 3. An eaves portion 12h is formed on the subject side of the coil support portion 12j so as to face the flange portion 52 in the optical axis direction and project outward in the radial direction. Then, as shown in FIG. 5B, the coil 3 is supported by the coil support portion 12j and is sandwiched between the eaves portion 12h and the flange portion 52 in the optical axis direction so that the outer circumference of the lens holding member 2 is formed. It is wound in an oval ring on the surface. In the present embodiment, the coil 3 is held by the lens holding member 2 without using an adhesive, but may be fixed to the lens holding member 2 by using an adhesive.

As described above, the flange portion 52 projects radially outward from the outer peripheral surface at the end portion of the tubular portion 12 on the image sensor side (Z2 side). A coil 3 is arranged on the subject side of the flange portion 52. As shown in FIG. 6B, the flange portion 52 is formed with two notched portions 52k with the optical axis JD of the lens body interposed therebetween. An extending portion 33, which is a part of a conductive wire rod (conductor wire) constituting the coil 3, is passed through the cutout portion 52k. Specifically, the extension portion 33A, which is the lead wire portion on the winding start side of the coil 3, is passed through one of the notch portions 52k, and the extension portion 33A, which is the lead wire portion on the winding end side of the coil 3, is passed through the other of the notch portions 52k. The existing part 33B is passed through.

As shown in FIG. 6A, the flange portion 52 includes two holding portions 72 as square convex protrusions protruding downward (Z2 direction) from the surface on the image sensor side (Z2 side), and a circle. It includes six projecting portions 2p having a convex shape and two contact portions 2q having a convex shape. At least one of the projecting portion 2p and the abutting portion 2q may have a rectangular convex shape.

As shown in FIG. 6B, the holding portion 72 corresponds to the holding portion 72A corresponding to the winding start side of the coil 3 (winding portion 13) and the winding end side of the coil 3 (winding portion 13). Includes a holding portion 72B. Each of the extending portion 33A and the extending portion 33B constituting both ends of the coil 3 is wound around the holding portion 72 and held.

As shown in FIGS. 6 (A) and 9 (A), the projecting portions 2p include three projecting portions 2p corresponding to the lower leaf spring 26A and three projecting portions 2p corresponding to the lower leaf spring 26B. And include. An inner portion 26i as a movable side support portion of each of the lower leaf spring 26A and the lower leaf spring 26B is positioned and fixed to the projecting portion 2p. The projecting portion 2p is a round hole 26k (FIG. 10) formed as a through portion formed in the inner portion 26i (inner joint portion 26c (see FIG. 10B)) of each of the lower leaf spring 26A and the lower leaf spring 26B. (B) is inserted. The penetrating portion may be a hole other than a round hole such as a square hole or an elliptical hole, or may be a notch as long as it corresponds to the shape of the projecting portion 2p.

Next, the drive mechanism MK of the lens drive device 101 will be described. As shown in FIG. 9B, the drive mechanism MK includes a coil 3, a yoke 4, and four magnets 5 arranged so as to face each of the four corners of the yoke 4. Then, the drive mechanism MK can generate a driving force (thrust) by the current flowing through the coil 3 and the magnetic field generated by the magnet 5 to move the lens holding member 2 up and down along the optical axis direction.

As shown in FIG. 6B, the coil 3 is formed by winding a lead wire around the outer circumference of the lens holding member 2. The coil 3 includes a winding portion 13 as a coil main body portion formed by being wound in an oval ring shape, and an extending portion 33 extending from the winding portion 13 and wound around a holding portion 72.

The extending portion 33 is an extending portion connected to an end portion (winding starting portion 13WS) of the winding portion 13 located on the inner peripheral side of the winding portion 13 on the winding start side of the coil 3 (winding portion 13). 33A and an extending portion 33B connected to an end portion (winding end portion 13WE) of the winding portion 13 located on the outer peripheral side of the winding portion 13 on the winding end side of the coil 3 (winding portion 13). ..

Specifically, as shown in FIG. 8A, the extending portion 33A extends so as to face the winding portion 33m wound around the holding portion 72A and the surface of the flange portion 52 on the image sensor side (Z2 side). It includes a connection portion 33c and an insertion portion 33k that is inserted through the notch portion 52k and extends from the image sensor side (Z2 side) of the flange portion 52 to the subject side (Z1 side). As shown in FIG. 8B, the extending portion 33B includes a winding portion 33m wound around the holding portion 72B, a connecting portion 33c extending so as to face the image sensor side (Z2 side) surface of the flange portion 52, and the extension portion 33B. The insertion portion 33k, which is inserted through the notch portion 52k and extends from the image sensor side (Z2 side) of the flange portion 52 to the subject side (Z1 side), intersects with the lead wire portion located on the outermost circumference (outermost layer) of the winding portion 13. Includes overlapping portions 33s, which extend so as to (overlap).

In the present embodiment, the extending portion 33A is a lens before the lead wire constituting the coil 3 is wound around the outer circumference of the lens holding member 2 (coil supporting portion 12j), that is, before the winding portion 13 is formed. It is wound around the holding portion 72A of the holding member 2. In the example shown in FIG. 8A, the extending portion 33A, which is a part of the conducting wire, 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 extending portion 33A is held by the holding portion 72A. However, the extending portion 33A may be wound around the holding portion 72A after the lead wire is wound around the outer circumference of the lens holding member 2, that is, after the winding portion 13 is formed.

After the extending portion 33A is wound around the holding portion 72A, the lead wire is wound around the outer circumference of the lens holding member 2. At that time, as shown in FIG. 8A, the lead wire extending from the winding portion 33m extends so as to face the bottom surface of the flange portion 52, and passes through the notch portion 52k from the lower side of the flange portion 52. It extends to the upper side of the flange portion 52. At this time, the portion of the flange portion 52 facing the bottom surface constitutes the connecting portion 33c of the extending portion 33A, and the portion passing through the notch portion 52k constitutes the insertion portion 33k of the extending portion 33A. A portion located between the winding portion 33m and the insertion portion 33k and not facing the flange portion 52 also constitutes the connecting portion 33c of the extending portion 33A.

As shown in FIG. 5B, the winding portion 13 of the coil 3 wound around the outer circumference of the lens holding member 2 is arranged at a position surrounding the periphery of the lens holding member 2. Further, the winding portion 13 is supported from the inside by the coil support portion 12j (see FIG. 5A), and is sandwiched between the eaves portion 12h and the flange portion 52 so that the flange portion 52 is on the subject side. It is fixed to. Further, since the inner peripheral surface of the winding portion 13 is isotropically and well-balancedly supported by the coil supporting portion 12j, the central axis of the coil 3 and the central axis of the lens holding member 2 coincide with each other in the winding portion 13. In this state, it is held by the lens holding member 2. Therefore, the lens driving device 101 is configured so that the optical axis JD of the lens body held by the lens holding member 2 easily coincides with the central axes of the lens holding member 2 and the coil 3.

When the winding of the lead wire around the outer circumference of the lens holding member 2 is completed, the extending portion 33B connected to the end of the winding portion 13 on the winding end side is the subject side of the flange portion 52 as shown in FIG. 8 (B). It is pulled out from the flange portion 52 to the image sensor side via the notch portion 52k. Specifically, the insertion portion 33k passes through the notch portion 52k, and the winding portion 33m is wound around the holding portion 72B of the lens holding member 2. In the example shown in FIG. 8B, the extending portion 33B is wound around the holding portion 72B for three turns. The portion of the extending portion 33B located between the insertion portion 33k and the winding portion 33m constitutes the connecting portion 33c of the extending portion 33B.

Next, the yoke 4 constituting the drive mechanism MK will be described. In the present embodiment, the yoke 4 is manufactured by subjecting a plate material made of a soft magnetic material such as iron to punching, drawing, or the like. Specifically, as shown in FIG. 1, the yoke 4 has a box-shaped outer shape that defines the storage portion 4s. The yoke 4 has a rectangular tubular outer wall portion 4A and a flat plate annular upper surface portion 4B provided so as to be continuous with the upper end (Z1 side end) of the outer wall portion 4A. As shown in FIG. 9B, the yoke 4 configured in this way is housed in the storage portion 4s so as to sandwich the magnet 5 between the outer wall portion 4A and the coil 3, and is housed in the storage portion 4s, and is housed in the storage portion 4s (A). As shown in the above, the housing is formed together with the base member 18 by being coupled to the base member 18. However, the yoke 4 may be replaced with a cover member made of a non-magnetic material such as austenitic stainless steel.

Next, the magnet 5 constituting the drive mechanism MK will be described. As shown in FIG. 1, the magnet 5 has a quadrangular prism shape having a trapezoidal bottom surface. Then, as shown in FIG. 9B, the four magnets 5 are located outside the coil 3 and are arranged so as to face each of the four corners of the rectangular tubular outer wall portion 4A constituting the yoke 4. ing. The magnet 5 is fixed to the yoke 4 by an adhesive. Further, the magnet 5 is arranged so that, for example, the inside (the side facing the optical axis JD) has an N pole and the outside has an S pole, or the inside has an S pole and the outside has an N pole. ..

Next, the leaf spring 6 and the fixed side member RG will be described. FIG. 10 is a diagram illustrating a leaf spring 6. FIG. 10A is a top view of the upper leaf spring 16, and FIG. 10B is a top view of the lower leaf spring 26. FIG. 11 is a diagram illustrating an example of a connection structure of three members (leaf spring holding member 1, yoke 4, and upper leaf spring 16). Specifically, FIG. 11A is a downward perspective view of the leaf spring holding member 1. That is, in FIG. 11A, the yoke 4 and the upper leaf spring 16 which are two of the three members are not shown. FIG. 11B is a downward perspective view of the leaf spring holding member 1 and the upper leaf spring 16. That is, in FIG. 11B, the illustration of the yoke 4, which is one of the three members, is omitted. FIG. 11C is a downward perspective view of the leaf spring holding member 1, the yoke 4, and the upper leaf spring 16. That is, in FIG. 11C, all three members are shown. FIG. 12 is a diagram illustrating an example of a connection structure between the lower leaf spring 26B and the coil 3 (extending portion 33B). Specifically, FIG. 12 (A) is an enlarged view of the portion T shown in FIG. 9 (A), and FIG. 12 (B) shows the portion T shown in FIG. 9 (A) when viewed from the X1 side. It is an enlarged view of the lower leaf spring 26B, the coil 3, and the lens holding member 2. In addition, in FIGS. 12A and 12B, the solder SD for joining the coil 3 and the lower leaf spring 26B is shown by cross-hatching. FIG. 13 is a diagram illustrating a base member 18 as a fixed side member RG. Specifically, it includes an exploded perspective view and a completed perspective view of the base member 18 in which the metal member 7 is embedded.

In the present embodiment, the leaf spring 6 is made of a metal plate whose main material is a copper alloy. The leaf spring 6 includes an upper leaf spring 16 arranged between the lens holding member 2 and the yoke 4 as shown in FIG. 4A, and a lens holding member 2 as shown in FIG. 9A. It includes a lower leaf spring 26 arranged between the base member 18 and the base member 18. In the state where the lens holding member 2 and the leaf spring 6 (upper leaf spring 16, lower leaf spring 26A, and lower leaf spring 26B) are engaged with each other, the lens holding member 2 of the leaf spring 6 is in the optical axis direction ( The lens holding member 2 is supported so as to be movable in the Z-axis direction). The lower leaf spring 26 also functions as a feeding member for supplying an electric current to the coil 3. Therefore, the lower leaf spring 26A is electrically connected to one end of the coil 3, and the lower leaf spring 26B is electrically connected to the other end of the coil 3.

As shown in FIG. 10A, the upper leaf spring 16 has a substantially rectangular shape, and has an inner portion 16i as a movable side support portion fixed to the lens holding member 2 and a fixed side member RG (leaf spring holding member). 1 and the outer portion 16e as a fixed side support portion fixed to the yoke 4), and four elastic arm portions 16g located between the inner portion 16i and the outer portion 16e. Specifically, the inner portion 16i is provided in an annular shape so as to surround the optical axis JD. The outer portion 16e has four corner portions 16b and four crosspieces 16r connecting two adjacent two of the four corner portions 16b.

As described above, the upper leaf spring 16 is formed so as to be substantially symmetrical twice, and is fixed to the lens holding member 2 at the inner portion 16i and fixed to the leaf spring holding member 1 and the yoke 4 at the outer portion 16e. It is configured to. Therefore, the upper leaf spring 16 can support the lens holding member 2 in a well-balanced manner.

When the upper leaf spring 16 is attached to the lens driving device 101, as shown in FIG. 4A, the inner portion 16i is mounted on the pedestal portion 12d of the lens holding member 2 (see FIG. 5A). Placed. Then, the inner portion 16i and the pedestal portion 12d are joined by the adhesive AD, and the inner portion 16i is fixed to the lens holding member 2. The outer portion 16e is sandwiched between the leaf spring holding member 1 and the upper surface portion 4B of the yoke 4 and fixed with an adhesive.

The leaf spring holding member 1 is configured to hold the upper leaf spring 16 on the subject side (Z1 side) of the yoke 4. Specifically, as shown in FIG. 11A, the leaf spring holding member 1 has a rectangular annular shape and projects downward (Z2 direction) from each of the four corner portions 1c and the four corner portions 1c. It has a protrusion 1p and a recess 1r formed inside the bottom surface (the surface on the Z2 side).

The protrusion 1p is inserted into a round hole 16k (see FIG. 10A) as a penetrating portion formed in the corner portion 16b of the upper leaf spring 16, and has four upper surface portions 4B forming the yoke 4. It is inserted into a round hole 4k (see FIG. 4B) as a penetrating portion formed in each of the corner portions.

More specifically, the protrusion 1p in the leaf spring holding member 1 includes the first protrusion 1p1 to the fourth protrusion 1p4 as shown in FIG. 11 (A). As shown in FIG. 4B, the round hole 4k formed in the yoke 4 includes the first round hole 4k1 to the fourth round hole 4k4. The round hole 16k formed in the upper leaf spring 16 includes the first round hole 16k1 to the fourth round hole 16k4 as shown in FIG. 10 (A). Then, as shown in FIG. 11B, the first protrusion 1p1 is inserted into the first round hole 16k1 formed in the upper leaf spring 16, and the second protrusion 1p2 is inserted into the second round hole 16k2. The third protrusion 1p3 is inserted into the third round hole 16k3, and the fourth protrusion 1p4 is inserted into the fourth round hole 16k4. Further, as shown in FIG. 11C, the first protrusion 1p1 is inserted into the first round hole 4k1 formed in the upper surface portion 4B of the yoke 4, and the second protrusion 1p2 is the second round hole 4k2. The third protrusion 1p3 is inserted into the third round hole 4k3, and the fourth protrusion 1p4 is inserted into the fourth round hole 4k4.

After that, the protrusion 1p is heat-caulked. In FIGS. 11 (A) to 11 (C), the protrusion 1p is shown in a state where the tip is deformed after being heat-caulked. The protrusion 1p may be cold crimped.

In this way, the outer portion 16e of the upper leaf spring 16 is sandwiched and fixed between the leaf spring holding member 1 and the upper surface portion 4B of the yoke 4. In the present embodiment, an adhesive is provided between the corner portion 1c of the leaf spring holding member 1 and the corner portion 16b of the outer portion 16e, and between the corner portion of the upper surface portion 4B and the corner portion 16b of the outer portion 16e. It is applied.

The recess 1r of the leaf spring holding member 1 is configured to allow elastic deformation of the elastic arm portion 16g constituting the upper leaf spring 16. In the present embodiment, the lens holding member 2 is not floating in the air when no current is flowing through the coil 3, is urged toward the image sensor side (Z2 side) by the leaf spring 6, and is urged to the image sensor side (Z2 side) via the contact portion 2q. Is in contact with the upper surface (Z1 side surface) of the base member 18. When a current flows through the coil 3, the lens holding member 2 is moved to the subject side (Z1 side) by an electromagnetic force and is held in the air away from the base member 18. At this time, in the elastic arm portion 16g of the upper leaf spring 16, the portion in contact with the inner portion 16i is displaced upward (Z1 direction). The recess 1r of the leaf spring holding member 1 is formed so as to allow this displacement.

As shown in FIG. 4A, the upper end of the lens holding member 2 projects upward (Z1 direction) from the upper surface portion 4B of the yoke 4 even when no current is flowing through the coil 3. .. Therefore, the recess 1r of the leaf spring holding member 1 is formed so as to allow the displacement of the elastic arm portion 16g and further protrusion of the lens holding member 2 when a current flows through the coil 3. ..

As shown in FIG. 10B, the lower leaf spring 26A and the lower leaf spring 26B are formed substantially symmetrically with each other, and the shape of the inner portion (the side facing the optical axis JD) of each is substantially half. It is configured to have a circular shape. Each of the lower leaf spring 26A and the lower leaf spring 26B has an inner portion 26i as a movable side support portion fixed to the lens holding member 2 and a fixed side support fixed to the fixed side member RG (base member 18). It includes an outer portion 26e as a portion and two elastic arm portions 26g located between the inner portion 26i and the outer portion 26e.

As shown in FIG. 10B, the inner portions 26i of the lower leaf spring 26A and the lower leaf spring 26B each have three inner joining portions 26c joined to the lens holding member 2 and an extending portion 33 of the coil 3. Includes a connection plate portion 26h opposite to the above.

When the lower leaf spring 26A and the lower leaf spring 26B are attached to the lens holding member 2, each of the six projecting portions 2p of the lens holding member 2 shown in FIG. 6 (A) is shown in FIG. 10 (B). The lower leaf spring 26A and the lower leaf spring 26B are inserted into and fitted into a round hole 26k as a penetrating portion provided in each inner joint portion 26c. The penetration may be a notch. As a result, the inner portions 26i of the lower leaf spring 26A and the lower leaf spring 26B are positioned and fixed to the lens holding member 2. The lower leaf spring 26A and the lower leaf spring 26B are fixed to the lens holding member 2 by, for example, hot or cold caulking the protruding portion 2p of the lens holding member 2.

As shown in FIGS. 12A and 12B, the connecting plate portion 26h of the inner portion 26i constituting the lower leaf spring 26B is a lens holding member when the lower leaf spring 26B is attached to the lens holding member 2. It faces the surface of 2 on the image sensor side (Z2 side). That is, the surface of the connecting plate portion 26h on the subject side (Z1 side) faces the surface of the flange portion 52 constituting the lens holding member 2 on the image sensor side (Z2 side). Then, as shown in FIG. 12B, the connecting portion 33c of the extending portion 33B constituting the coil 3 is the surface of the inner portion 26i of the lower leaf spring 26B on the subject side (Z1 side) and the lens holding member 2. It extends through the surface of the flange portion 52 on the image sensor side (Z2 side).

When the lower leaf spring 26B is attached to the lens holding member 2, the tip of the holding portion 72B of the holding portion 72B is closer to the image sensor side (Z2 side) than the inner portion 26i of the lower leaf spring 26B, as shown in FIG. 12 (B). It protrudes downward (in the Z2 direction) from the inner portion 26i so as to be located. A part of the winding portion 33m is also wound around the holding portion 72B so as to be located closer to the image sensor side (Z2 side) than the inner portion 26i.

The lower leaf spring 26B and the extending portion 33B of the coil 3 are electrically and mechanically connected by a solder SD. Specifically, as shown in FIG. 9A, the lower leaf spring 26B has a lens such that the round hole 26k formed in the inner joint portion 26c and the projecting portion 2p of the lens holding member 2 are fitted to each other. It is attached to the holding member 2. Then, the protruding portion 2p of the lens holding member 2 is heated, and the solder paste applied to the connecting plate portion 26h is heated by the laser beam. However, the lower leaf spring 26B and the extending portion 33B of the coil 3 may be electrically and mechanically connected by a conductive adhesive in which a conductive filler such as silver particles is dispersed in a synthetic resin.

The above description with reference to FIG. 12 is similarly applied to the connection between the lower leaf spring 26A, the lens holding member 2, and the coil 3.

As shown in FIG. 10B, the outer portion 26e of the lower leaf spring 26A includes two outer joint portions 26d that are joined to the base member 18. Similarly, the outer portion 26e of the lower leaf spring 26B includes two outer joint portions 26d that are joined to the base member 18.

The base member 18 is manufactured by injection molding using, for example, a synthetic resin such as a liquid crystal polymer. In the present embodiment, as shown in FIG. 13, the base member 18 is a member having a substantially rectangular plate-like outer shape, and a circular opening 18k is formed in the center. Further, on the surface of the base member 18 on the subject side (Z1 side), four projecting portions 18t protruding upward are provided. The projecting portion 18t is inserted and fitted into a through hole 26t (see FIG. 10B) provided in the outer joint portion 26d of each of the lower leaf spring 26A and the lower leaf spring 26B. At this time, the projecting portion 18t is heat-caulked and fixed to the outer joint portion 26d. In FIG. 13, the projecting portion 18t is shown in a state where the tip is deformed after being heated. The projecting portion 18t may be cold crimped and fixed to the outer joint portion 26d.

As shown in FIG. 13, a metal member 7 formed of a metal plate containing a material such as copper or iron or an alloy containing the same as a main component is insert-molded and embedded in the base member 18.

The metal member 7 includes a first metal member 7A to a third metal member 7C. The first metal member 7A has a connection portion 7AC exposed from the upper surface (Z1 side surface) of the base member 18, and the second metal member 7B has a connection exposed from the upper surface (Z1 side surface) of the base member 18. It has a part 7BC. The surface of the connecting portion 7AC and the surface of the connecting portion 7BC are located on the same plane.

The connecting portion 7AC faces the through hole 26dt (see FIG. 10B) formed in the outer joining portion 26d of the lower leaf spring 26B, and is joined to the outer side of the lower leaf spring 26B via the conductive joining material. Connected to portion 26d. The conductive bonding material is, for example, solder or a conductive adhesive. In this embodiment, the conductive bonding material is a conductive adhesive.

Similarly, the connecting portion 7BC faces the through hole 26dt (see FIG. 10B) formed in the outer joining portion 26d of the lower leaf spring 26A, and the lower leaf spring 26A is interposed via the conductive joining material. It is connected to the outer joint portion 26d of.

The first metal member 7A has a terminal portion 7AT protruding downward from the bottom surface (Z2 side surface) of the base member 18, and the second metal member 7B is downward from the bottom surface (Z2 side surface) of the base member 18. It has a terminal portion 7BT protruding from the surface.

The third metal member 7C has end portions 7C1 to 7C4 protruding outward from the corner portion of the base member 18 in a direction perpendicular to the optical axis direction. Each of the ends 7C1 to 7C4 is configured to be in contact with the lower ends of the four corners of the yoke 4, as shown in FIGS. 2 (A) and 2 (B).

The base member 18 is positioned by combining the inner surface of the outer wall portion 4A of the yoke 4 and the outer peripheral side surface of the base member 18, and then the ends 7C1 to 7C4 and the lower ends of the four corners of the yoke 4 are welded together. Is fixed to the yoke 4. The yoke 4 and the base member 18 may be fixed at least partially with an adhesive.

Next, the coil 3 held by the lens holding member 2 will be described with reference to FIGS. 14 to 16. 14 and 15 show a lens holding member 2 that holds the coil 3. Specifically, FIG. 14A is a side view of the lens holding member 2 around which the coil 3 is wound, and FIG. 14B is an XY plane including the line segment L1 shown in FIG. 14A. It is sectional drawing of the lens holding member 2 around which the coil 3 is wound in the parallel virtual plane. FIG. 15A is a cross-sectional perspective view of the lens holding member 2 around which the coil 3 is wound in a virtual plane parallel to the XZ plane including the line segment L2 shown in FIG. 14A. FIG. 15B is a cross-sectional view of the lens holding member 2 around which the coil 3 is wound when a virtual plane parallel to the XZ plane including the line segment L2 shown in FIG. 14A is viewed from the Y2 side. .. FIG. 16 is an enlarged view of a portion U surrounded by a broken line shown in FIG. 15 (B).

As shown in FIG. 14B, the coil support portion 12j of the lens holding member 2 has an inner peripheral wall portion 12N that provides a substantially circular inner peripheral wall having a diameter D1 in the top view, and a minor diameter D2 and a major diameter D3 in the top view. Includes an outer peripheral wall portion 12E that provides a substantially elliptical outer peripheral wall.

The winding portion 13 is held by the outer peripheral wall portion 12E. That is, the lead wire constituting the winding portion 13 is wound around the outer peripheral wall portion 12E which provides a substantially elliptical outer peripheral wall when viewed from above.

In a configuration in which a lead wire is wound around an outer peripheral wall portion that brings about a polygonal (for example, octagonal) outer peripheral wall in a top view, the lead wire wound around the outer peripheral wall portion is subjected to winding tension at a portion corresponding to each apex of the polygon. However, winding tension cannot be applied to the parts corresponding to each side of the polygon. Therefore, the outer peripheral wall portion that provides a polygonal outer peripheral wall in the top view is more likely to cause winding disorder than the outer peripheral wall portion 12E that provides a substantially elliptical outer peripheral wall in the top view as in the present embodiment. On the other hand, the lead wire wound around the outer peripheral wall portion 12E that brings about a substantially elliptical outer peripheral wall in a top view as in the present embodiment is always in a state where winding tension is applied, and is easily aligned and wound. As a result, the outer peripheral wall portion 12E can improve the adhesion between the lens holding member 2 and the lead wire.

In this way, the coil support portion 12j of the lens holding member 2 around which the lead wire constituting the winding portion 13 is wound has the long diameter portion 12jL corresponding to the portion where the diameter of the outer peripheral wall portion 12E is maximized and the outer peripheral wall portion 12E. It has a short diameter portion 12jS corresponding to a portion having a minimum diameter.

As shown in FIG. 14B, the position where the major axis portion 12jL is formed corresponds to the position where the notch portion 52k is formed, and the extending portion connected to the end portion of the winding portion 13. It corresponds to 33 positions.

More specifically, as shown in FIG. 15A, the lead wire constituting the winding portion 13 is wound around the outer peripheral wall portion 12E of the coil supporting portion 12j so as to form a five-layered layer. The quintuple layer includes a first layer 13A, a second layer 13B, a third layer 13C, a fourth layer 13D, and a fifth layer 13E. However, the lead wire constituting the winding portion 13 may be wound around the outer peripheral wall portion 12E so as to form a layer having four or less layers or a layer having six or more layers.

Each of the first layer 13A to the fourth layer 13D includes a lead wire portion having a predetermined number of turns (first turn number). The outermost layer, the fifth layer 13E, includes a lead wire portion having a predetermined number of turns (second turn number), which is smaller than the number of first turns. In the example shown in FIG. 15A, the number of first turns is 11 and the number of second turns is 9.

As shown in FIG. 15A, the outermost layer, the fifth layer 13E, extends from the first lead wire portion 13E1 on the lowermost side (Z2 side) to the ninth lead wire portion 13E9 on the uppermost side (Z1 side). It is composed of the 9-turn lead wire part.

The ninth lead wire portion 13E9 is connected to the overlapping portion 33s of the extending portion 33B at the winding end portion 13WE. As shown in FIG. 15B, the overlapping portion 33s extends downward (Z2 direction) from the first lead wire portion 13E1 so as to cross the outside (X1 side) of the eighth lead wire portion 13E8, and the first lead wire portion At 13E1, it turns inward (in the X2 direction) and extends to connect to the insertion portion 33k.

As shown in FIG. 16, the conducting wire constituting the winding portion 13 has a conductive metal wire MW and an insulating coating layer CL covering the metal wire MW. The coating layer CL includes an insulating layer IL and a fusion layer WL. In the present embodiment, the metal wire MW is made of copper, the insulating layer IL is made of polyurethane resin, and the fused layer WL is made of polyamide resin. Then, the fusion layer WL of each of the two adjacent conducting wire portions is configured to be fused to each other. FIG. 16 shows a state in which the fused layer WL of the seventh conducting wire portion 13E7 constituting the fifth layer 13E is integrated with the fused layer WL of other adjacent conducting wire portions by heat fusion. There is. Heat fusion is realized, for example, by heat treatment with hot air or the like. The other adjacent wire portions are the sixth wire portion 13E6 and the eighth wire portion 13E8 constituting the fifth layer 13E, and the sixth wire portion 13D6 and the seventh wire portion 13D7 constituting the fourth layer 13D. And include.

In the present embodiment, the fusion layer WL of the overlapping portion 33s of the extending portion 33B is the fusion layer of the first lead wire portion 13E1 to the eighth lead wire portion 13E8 constituting the fifth layer 13E which is the outermost layer. Only in contact with the WL, integration by fusion has not been realized. However, the fusion layer WL of the overlapping portion 33s may be integrated with the respective fusion layers WL of the first lead wire portion 13E1 to the eighth lead wire portion 13E8 by heat fusion. Further, in the winding portion 33m of the extending portion 33B, the metal wire MW is not covered with the coating layer CL and is in an exposed state. This is for electrical connection with the lower leaf spring 26B. The same applies to the winding portion 33m of the extending portion 33A.

As described above, the lens driving device 101 according to the present embodiment includes a base member 18 as a support member, a lens holding member 2 capable of holding a lens body, a coil 3 held by the lens holding member 2, and a coil. It is provided with a pair of lower leaf springs 26 that are arranged so as to connect the magnet 5 facing the lens 3 and the base member 18 and the lens holding member 2 and support the lens holding member 2 so as to be movable in the optical axis direction. The coil 3 is a lower leaf spring that extends from a winding portion 13 composed of a conducting wire wound around the outer circumference of the lens holding member 2 and a winding start portion 13WS of the winding portion 13 and is one of the lower leaf springs 26. A second extending portion 33A as a first extending portion connected to 26A and a second extending portion extending from the winding end portion 13WE of the winding portion 13 and connected to the lower leaf spring 26B which is the other side of the lower leaf spring 26. It has an extending portion 33B as an extending portion. The lead wire constituting the winding portion 13 has a metal wire MW and an insulating coating layer CL covering the metal wire MW. The extending portion 33B extends so as to intersect the lead wire portion located on the outermost circumference (outermost layer) of the winding portion 13 with the winding end portion 13WE as a base point.

Specifically, as shown in FIG. 15B, the overlapping portion 33s of the extending portion 33B is a first conducting wire constituting the fifth layer 13E, which is a conducting wire portion located in the outermost layer of the winding portion 13. Downward (Z2 direction) so as to intersect (overlap) each of the portions 13E1 to 8th lead portions 13E8, that is, to cross each outside (X1 side) of the first lead portion 13E1 to 8th lead portion 13E8. It is configured to extend and connect to the insertion portion 33k.

With this configuration, the lens driving device 101 can make it difficult for the coating layer CL of the lead wire portion to be peeled off at the winding end portion 13WE. When the extending portion 33B is pulled downward (in the Z2 direction) for winding around the holding portion 72B, the ninth conducting wire portion 13E9 constituting the fifth layer 13E is fused at the winding end portion 13WE. This is to generate a force that presses the layer WL against the fusion layer WL of the eighth lead wire portion 13E8 adjacent to the lower side of the ninth lead wire portion 13E9. That is, the extending portion 33B fuses the fusion layer WL of the ninth lead wire portion 13E9 constituting the fifth layer 13E to the eighth lead wire portion 13E8 adjacent to the lower side of the ninth lead wire portion 13E9. This is because a force for pulling away from the layer WL is not generated. As a result, the lens driving device 101 can suppress the generation of peeling dust of the coating layer even when an impact due to dropping or the like is applied, and by extension, foreign matter such as peeling dust adheres to the image sensor. It can be suppressed. Therefore, the lens driving device 101 can prevent foreign matter such as peeling dust from adversely affecting the image.

In the example shown in FIG. 15A, the lead wire constituting the winding portion 13 is an odd-numbered layer including the first layer 13A, the third layer 13C, and the fifth layer 13E, as shown by the arrow AR1. It is wound in order from the Z2 side to the Z1 side, and in the even-numbered layer including the second layer 13B and the fourth layer 13D, it is wound in order from the Z1 side to the Z2 side. Therefore, in the example of FIG. 15A, the winding portion 13 is configured so that the overlapping portion 33s of the extending portion 33B intersects (overlaps) each of the conducting wire portions located in the outermost layer of the winding portion 13. The outermost layer needs to be an odd layer. When the outermost layer is an even-numbered layer, when the extending portion 33B is pulled downward (in the Z2 direction) for winding around the holding portion 72B, the lead wire forming the outermost layer at the winding end portion 13WE. A force is generated to separate the fusion layer WL of the lowest lead wire portion located on the lowermost side (Z2 side) of the portions from the fusion layer WL of the lead wire portion adjacent to the upper side of the lowest lead wire portion. This is because it will end up.

The winding end portion 13WE is typically provided between one end and the other end of the winding portion 13 in the optical axis direction. In the example shown in FIG. 15B, the outermost layer, the fifth layer 13E, is configured to include a lead wire portion of up to 11 turns, and the winding end portion 13WE is the winding portion 13. It is arranged at the ninth lead wire portion 13E9 of the fifth layer 13E, which is between one end portion (the portion in contact with the eaves portion 12h) and the other end portion (the portion in contact with the flange portion 52) in the optical axis direction. There is. The ninth lead wire portion 13E9 is the uppermost lead wire portion located on the uppermost side (Z1 side) of the lead wire portions constituting the outermost layer.

The winding end portion 13WE may be arranged at any of the second lead wire portions 13E2 to the eighth lead wire portion 13E8 of the fifth layer 13E. That is, the uppermost lead wire portion of the fifth layer 13E may be any of the second lead wire portion 13E2 to the eighth lead wire portion 13E8. Further, the winding end portion 13WE may be arranged at the 10th lead wire portion when the 5th layer 13E includes the 10th lead wire portion, and when the 5th layer 13E includes the 11th lead wire portion. May be located at the eleventh lead wire portion. As described above, as the number of turns of the outermost layer of the winding portion 13, any number of turns of 2 or more may be adopted.

In the present embodiment, the position of the winding end portion 13WE is such that the overlapping portion 33s of the extending portion 33B extending from the winding end portion 13WE to the holding portion 72B is notched as shown in FIGS. 12A and 12B. It is set so as to be connected to the insertion portion 33k at the central portion of the portion 52k. That is, the position of the winding end portion 13WE is set so that the extending portion 33B does not come into contact with the flange portion 52 at the insertion portion 33k. Therefore, the extending portion 33B does not come into contact with the edge of the flange portion 52 at the notch portion 52k even when an impact due to dropping or the like is applied to the lens driving device 101, and the edge of the flange portion 52 does not come into contact with the edge of the flange portion 52. There is no disconnection due to contact with.

The lens holding member 2 typically has a tubular portion 12 around which a conducting wire is wound, and is formed so that the outer circumference of the annular cross section of the tubular portion 12 has an oval shape. The oval shape includes an oval shape, a rounded rectangle, an oval shape, an oval shape, and the like. In the above-described embodiment, the tubular portion 12 is formed so that the outer circumference of the annular cross section has a substantially elliptical shape having a minor axis D2 and a major axis D3 as shown in FIG. 14 (B).

With this configuration, the tubular portion 12 of the lens holding member 2 can increase the ease of winding the winding portion 13. This is because the lead wires that are aligned and wound around the tubular portion 12 formed so that the outer circumference of the annular cross section has an oval shape are always in a state where winding tension is applied. Further, the winding portion 13 wound around the tubular portion 12 formed so that the outer circumference of the annular cross section has an oval shape is difficult to move with respect to the tubular portion 12. This is because the adhesion between the tubular portion 12 and the winding portion 13 is enhanced. This difficulty in movement has the effect of preventing disconnection of the lead wire. In the above-described embodiment, the winding portion 13 is directly wound and held around the coil supporting portion 12j of the tubular portion 12 without using an adhesive, but after being wound around the coil supporting portion 12j. Then, it may be fixed to the coil support portion 12j using an adhesive.

The lens holding member 2 typically has a flange portion 52 that supports the winding portion 13 and a pair of holding portions 72 that hold the extending portion 33. In the present embodiment, the pair of holding portions 72 includes a holding portion 72A that holds the extending portion 33A and a holding portion 72B that holds the extending portion 33B.

As shown in FIG. 14B, the tubular portion 12 has a long diameter portion 12jL having the maximum diameter dimension passing through the optical axis JD in a plan view (top view). The flange portion 52 is provided with a notch portion 52k for passing the extending portion 33 so as to correspond to the major axis portion 12jL.

With this configuration, on the lower surface (Z2 side surface) of the flange portion 52, the area (or radial width) of the portion corresponding to the major diameter portion 12jL is the area (or the area of the portion corresponding to the minor diameter portion 12jS). Width in the radial direction) This is because the coil support portion 12j in the tubular portion 12 has an inner peripheral wall portion 12N that provides a substantially circular inner peripheral wall. Therefore, the lens holding member 2 can secure an area (diameter width) in which the lower leaf spring 26 is arranged even if the notch 52k is provided at a position corresponding to the major axis portion 12jL.

The preferred embodiment of the present invention has been described in detail above. However, the present invention is not limited to the embodiments described above. Various modifications, substitutions, and the like can be applied to the above-described embodiments without departing from the scope of the present invention. In addition, each of the features described with reference to the above-described embodiments may be appropriately combined as long as there is no technical contradiction.

For example, in the above-described embodiment, the holding portion 72B around which the extending portion 33B is wound is configured to project downward (Z2 direction) from the lower surface (Z2 side) surface of the flange portion 52. However, the holding portion 72B may be configured to project in a direction other than downward, such as laterally, diagonally upward, or diagonally downward.

FIG. 17 is an enlarged view of the lower leaf spring 26B, the coil 3, and the lens holding member 2, and corresponds to FIG. 12 (B). The lens holding member 2 shown in FIG. 17 is different from the lens holding member 2 shown in FIG. 12 (B) in that the holding portion 72B projecting from the tubular portion 12 in the X1 direction is provided at the cutout portion 52k.

The holding portion 72B shown in FIG. 17 is a T-shaped protruding portion including a retaining portion for preventing the winding portion 33m from coming off in the X1 direction. The retaining portion protrudes from the tip of the holding portion 72B in each of the Y1 direction and the Y2 direction.

The lower portion (Z2 side) of the winding portion 33m wound around the holding portion 72B shown in FIG. 17 is electrically and mechanically connected to the inner portion 26i of the lower leaf spring 26B via the solder SD. With this configuration, the holding portion 72B shown in FIG. 17 can more reliably prevent contact between the extending portion 33B and the flange portion 52.

Further, in the above embodiment that realizes the automatic focus adjustment function, the lower leaf spring 26A and the extending portion 33A are electrically connected, and the lower leaf spring 26B and the extending portion 33B are electrically connected. However, the present invention is not limited to this configuration. In the present invention, for example, in a lens driving device with an image stabilization function, the upper leaf spring 16 is divided into two, one of which is electrically connected to the extending portion 33A and the other of which is the extending portion 33B. May include configurations that are electrically connected to. In this configuration, the upper leaf spring 16 is arranged so as to connect the magnet holder as the support member and the lens holding member 2, and is configured to support the lens holding member 2 so as to be movable in the optical axis direction. .. The magnet holder is a member that holds the magnet 5 facing the coil 3 held by the lens holding member 2, and is typically connected to the base member 18 via a suspension wire in the optical axis direction by the suspension wire. It is supported so that it can be moved in the direction perpendicular to the magnet. Specifically, the magnet holder is perpendicular to the optical axis direction by a drive mechanism composed of a magnet 5 and a coil different from the coil 3 installed on the base member 18 so as to face the magnet 5. It is configured to be able to move in the direction. In this case, the holding portion 72 as the protruding portion may be provided on the upper side of the lens holding member 2 on which the upper leaf spring 16 is arranged.

1 ... Leaf spring holding member 1c ... Corner part 1p ... Protruding part 1r ... Recessed part 2 ... Lens holding member 2p ... Protruding part 2q ... Contact part 3 ... Coil 4 ... Yoke 4A ... Outer wall part 4B ... Top surface part 4k ... Round hole 4s ... Storage part 5 ... Magnet 6 ... Leaf spring 7 ... Metal member 7A ...・ First metal member 7AT ・ ・ ・ Terminal part 7B ・ ・ ・ Second metal member 7BT ・ ・ ・ Terminal part 7C ・ ・ ・ Third metal member 7C1-7C4 ・ ・ ・ End part 12 ・ ・ ・ Cylindrical part 12d ・・ ・ Pedestal part 12dh ・ ・ ・ Recessed 12E ・ ・ ・ Outer wall part 12h ・ ・ ・ Eave part 12j ・ ・ ・ Coil support part 12jL ・ ・ ・ Major diameter part 12jS ・ ・ ・ Short diameter part 12N ・ ・ ・ Inner peripheral wall part 13・ ・ ・ Winding part 13A ・ ・ ・ 1st layer 13B ・ ・ ・ 2nd layer 13C ・ ・ ・ 3rd layer 13D ・ ・ ・ 4th layer 13E ・ ・ ・ 5th layer 13WE ・ ・ ・ Winding end part 13WS ・・ ・ Winding start part 16 ・ ・ ・ Upper leaf spring 16b ・ ・ ・ Corner part 16e ・ ・ ・ Outer part 16g ・ ・ ・ Elastic arm part 16i ・ ・ ・ Inner part 16k ・ ・ ・ Round hole 16r ・ ・ ・ Cross part 18・ ・ ・ Base member 18k ・ ・ ・ Opening 18t ・ ・ ・ Protruding part 26, 26A, 26B ・ ・ ・ Lower leaf spring 26c ・ ・ ・ Inner joint part 26d ・ ・ ・ Outer joint part 26dt ・ ・ ・ Through hole 26e ・・ ・ Outer part 26g ・ ・ ・ Elastic arm part 26h ・ ・ ・ Connection plate part 26i ・ ・ ・ Inner part 26k ・ ・ ・ Round hole 26t ・ ・ ・ Through hole 33, 33A, 33B ・ ・ ・ Extension part 33c ・ ・・ Connection part 33k ・ ・ ・ Insertion part 33m ・ ・ ・ Winding part 33s ・ ・ ・ Overlapping part 52 ・ ・ ・ Flange part 52k ・ ・ ・ Notch part 72, 72A, 72B ・ ・ ・ Holding part 101 ・ ・ ・ Lens drive device AD ・ ・ ・ Adhesive CL ・ ・ ・ Coating layer IL ・ ・ ・ Insulation layer JD ・ ・ ・ Optical axis MK ・ ・ ・ Drive mechanism MW ・ ・ ・ Metal wire RG ・ ・ ・ Fixed side member SD ・ ・ ・ Solder WL ・・ ・ Fusion layer

Claims (5)

Support members and
A lens holding member that can hold the lens body and
The coil held by the lens holding member and
The magnet facing the coil and
In a lens driving device provided with a pair of leaf springs arranged so as to connect the support member and the lens holding member and movably supporting the lens holding member in the optical axis direction.
The coil has a winding portion composed of a conducting wire wound around the outer circumference of the lens holding member, and a first extending portion extending from the winding start portion of the winding portion and connected to one of the leaf springs. And a second extending portion extending from the winding end portion of the winding portion and connected to the other leaf spring.
The lead wire has a metal wire and an insulating coating layer covering the metal wire.
The lens driving device is characterized in that the second extending portion extends from the winding end portion as a base point so as to intersect with a conducting wire portion located at the outermost periphery of the winding portion. The winding end portion is provided between one end portion and the other end portion in the optical axis direction of the winding portion.
The lens driving device according to claim 1. The lens holding member has a tubular portion around which the lead wire is wound, and is formed so that the outer circumference of the annular cross section of the tubular portion has an oval shape.
The lens driving device according to claim 1 or 2. The lens holding member has a flange portion for supporting the winding portion and a pair of holding portions for holding the first extending portion and the second extending portion, respectively.
The tubular portion has a long diameter portion having the maximum diameter dimension passing through the optical axis in a plan view.
The flange portion is provided with notches for passing the first extending portion and the second extending portion, respectively, corresponding to the major axis portion.
The lens driving device according to claim 3. The lens driving device according to any one of claims 1 to 4.
With the lens body
It has an image sensor facing the lens body.
The camera module.

Images