JP2020154254A - Lens driving device, camera module, and method for manufacturing lens driving device - Google Patents

Abstract

To provide a lens driving device 101 capable of suppressing contact between adhesive AD and solder SD.SOLUTION: A lens driving device 101 has a lens holding member 2 provided with a holding unit 72A. Part of an extending unit 33A of a coil 3 is wound around the holding unit 72A to configure a winding unit 33m. The winding unit 33m and an inner portion 26i of a lower leaf spring 26A are soldered. In the inner portion 26i of the lower leaf spring 26A, a first square hole 26j1 and a first round hole 26k1 are formed. The first round hole 26k1 is disposed between a soldering portion 26s of the inner portion 26i and the first square corner hole 26j1. With the lens holding member 2, a first projection portion 2p1 is formed that is inserted into the first round hole 26k1. The inner portion 26i and the lens holding member 2 are bonded and fixed by adhesive AD applied to the first square angle hole 26j1 and the lens holding member 2 exposed from the first square angle hole 26j1.SELECTED DRAWING: Figure 14

Description

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

Conventionally, a lens holding device as a lens driving device including a lens carrier as 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 lens holding member is movably held in the optical axis direction by a conductive spring (leaf spring). The coil and the leaf spring are connected by soldering, and the lens holding member and the leaf spring are adhesively fixed by an adhesive.

Japanese Unexamined Patent Publication No. 2014-174403

However, in the above-mentioned lens driving device, the adhesive that adheres and fixes the lens holding member and the leaf spring may adhere to the portion to which the solder paste containing the solder that bonds the coil and the leaf spring is applied. .. Then, the adhesion of the adhesive to the portion to which the solder paste is applied may prevent the coil and the leaf spring from being properly joined by soldering.

Therefore, it is desirable to provide a lens driving device capable of suppressing contact between an adhesive that adheres and fixes the lens holding member and the leaf spring and a bonding material such as solder that bonds the coil and the leaf spring.

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. A lens driving device including a leaf spring that is arranged so as to connect to the lens holding member and supports the lens holding member so as to be movable in the optical axis direction, wherein the coil is outside the lens holding member. The leaf spring has a coil main body portion to be arranged and an extending portion connected to the coil main body portion, and the leaf spring has a movable side support portion fixed to the lens holding member and a fixed side fixed to the support member. It has a support portion and an elastic arm portion provided between the movable side support portion and the fixed side support portion, and the lens holding member is provided with a protruding portion and the extending portion of the coil. A part of the lens is wound around the protruding portion to form a winding portion, and the winding portion and the soldered portion of the movable side support portion are soldered to the movable side support portion of the leaf spring. A first penetrating portion and a second penetrating portion are formed in the lens, and the second penetrating portion is arranged between the soldered portion of the movable side support portion and the first penetrating portion, and is attached to the lens holding member. Is formed with a protrusion to be inserted into the second penetrating portion, and is supported on the movable side by an adhesive applied to the first penetrating portion and the lens holding member exposed from the first penetrating portion. The portion and the lens holding member are fixed.

By the above-mentioned means, a lens driving device capable of suppressing contact between an adhesive for adhering and fixing a lens holding member and a leaf spring and a bonding material such as solder for bonding the coil and the leaf spring is provided.

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 top view and a bottom 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 the lower leaf spring and a coil in a lens drive device. It is an upper perspective view of the base member of a lens driving device. It is a figure explaining an example of the connection structure of a lower leaf spring and a coil. It is a figure explaining another example of the connection structure of a lower leaf spring and a coil.

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 yoke 4 removed. FIG. 4B is an upward perspective view of the lens driving device 101 in a state where the spacer 1 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 metal member 7 that provides an electrical connection with the outside are provided. Including. 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 includes a coil 3 wound in an octagonal ring shape, a yoke 4 that also serves as a rectangular box-shaped outer case, and four magnets 5 arranged to face the four corners of the yoke 4. And include. In the present embodiment, the magnet 5 has a quadrangular prism shape having a trapezoidal bottom surface. The fixed-side member RG includes a spacer 1, a yoke 4, and a base member 18 in which a metal member 7 is embedded. The leaf spring 6 includes an upper leaf spring 16 that connects the spacer 1 and the lens holding member 2, 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 springs 26A and 26B, 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 a direction away from the image sensor to enable macro photography, and moves the lens holding member 2 in a direction approaching 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) is 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. 6 (A) is a downward perspective view of the lens holding member 2, and FIG. 6 (B) is a state in which the coil 3 is wound around the lens holding member 2 of FIG. 6 (A). It is a lower perspective view. FIG. 7A is a top view of the lens holding member 2, and FIG. 7B is a bottom view of the lens holding member 2. 8 (A) is a downward perspective view of the lens holding member 2, and FIG. 8 (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. 8 (A). It is a downward perspective view of. 9 (A) is an enlarged view of the portion S shown in FIG. 8 (B), and FIG. 9 (B) is an enlarged view of the portion P shown in FIG. 6 (B). FIG. 10 (A) 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. 10 (B) further shows the lower leaf spring 26A, the lower leaf spring 26B, and the lens holding. It is a bottom view of the lens driving device 101 in the state where the member 2 is removed.

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.

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. Further, the tubular portion 12 is provided with two pedestal portions 12d having two recesses 12dh on the end surface on the subject side with the optical axis interposed therebetween. As shown in FIG. 4B, 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 wall portion that supports the coil 3 from the inside. In the present embodiment, the coil support portion 12j is arranged in four parts so as to support the octagonal annular coil 3. On the subject side of the coil support portion 12j, four eaves portions 12h protruding outward in the radial direction so as to face the flange portion 52 in the optical axis direction are formed. 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 wrapped in an octagonal ring on the surface.

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 the wire rod constituting the coil 3, is passed through the notch portion 52k. Specifically, the extending portion 33A, which is the wire rod on the winding start side of the coil 3, is passed through one of the notch portions 52k, and the extending portion, which is the wire rod on the winding end side of the coil 3, is passed through the other of the notch portions 52k. 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. Includes four convex protrusions 2p. The protrusion 2p may have a square 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. Both ends of the coil 3 are wound around the holding portion 72 and held.

As shown in FIGS. 6 (A) and 10 (A), the protrusion 2p includes two protrusions 2p corresponding to the lower leaf spring 26A and two protrusions 2p corresponding to the lower leaf spring 26B. .. 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 mounted on the protrusion 2p. The fixing of the inner portion 26i of each of the lower leaf spring 26A and the lower leaf spring 26B is an adhesive applied to the square hole 26j (see FIG. 12A) as the first penetrating portion formed in the inner portion 26i. It is realized by AD (see FIG. 12 (A)). In this embodiment, the adhesive AD is a thermosetting adhesive. However, the adhesive AD may be an ultraviolet curable adhesive. The protrusion 2p is inserted into a round hole 26k (see FIG. 12A) as a second penetrating portion formed in each inner portion 26i of the lower leaf spring 26A and the lower leaf spring 26B. The first penetrating portion may be a hole other than a square hole such as a round hole or an elliptical hole, or may be a notch. Similarly, the second penetrating portion may be a hole other than a round hole such as a square hole or an elliptical hole as long as it corresponds to the shape of the protrusion 2p, or may be a notch.

Next, the drive mechanism MK of the lens drive device 101 will be described. As shown in FIG. 10B, 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, and can 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 conductive wire rod 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 octagonal ring shape, and an extending portion 33 extending from the winding portion 13 and wound around a holding portion 72. In FIG. 6B, for the sake of clarity, the detailed winding state of the conductive wire rod whose surface is coated with the insulating member is omitted for the winding portion 13. The same applies to the other drawings illustrating the winding portion 13.

The extending portion 33 is connected to the end portion (winding starting portion) 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). And the extending portion 33B connected to the end portion (winding end portion) 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. 9A, the extending portion 33A has a winding portion 33m wound around the holding portion 72A and an image sensor side (Z2 side) of the flange portion 52 inserted through the notch portion 52k. Includes an insertion portion 33k extending from the subject side (Z1 side). As shown in FIG. 9B, the extending portion 33B has a winding portion 33m wound around the holding portion 72B and a flange portion 52 inserted through the notch portion 52k from the image sensor side (Z2 side) to the subject side (Z1). Includes an insertion portion 33k extending to the side).

In the present embodiment, the extending portion 33A is a lens holding member before the wire rod of 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 2. In the example shown in FIG. 9A, the extending portion 33A, which is a part of the wire rod of the coil 3, is wound around the holding portion 72A for 3 turns. As a result, the winding portion 33m is formed on 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 wire rod of the coil 3 is wound around the outer circumference of the lens holding member 2, that is, after the winding portion 13 is formed.

Next, the wire rod is wound around the outer circumference of the lens holding member 2. At that time, as shown in FIG. 9A, the wire rod 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 above the flange portion 52. At this time, the portion passing through the notch portion 52k constitutes the insertion portion 33k 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 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 wire rod around the outer circumference of the lens holding member 2 is completed, the extending portion 33B connected to the end portion of the winding portion 13 on the winding end side is the subject side of the flange portion 52 as shown in FIG. 9B. 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. 9B, the extending portion 33B is wound around the holding portion 72B for three turns.

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 and drawing. Specifically, as shown in FIG. 1, the yoke 4 has a box-shaped outer shape that defines the storage portion 4s. The yoke 4 is provided with light from the rectangular tubular outer wall portion 4A, the 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, and the inner peripheral edge of the upper surface portion 4B. It has four inner wall portions 4F extending downward (Z2 direction) along the axial direction. As shown in FIG. 10B, the yoke 4 configured in this way accommodates the coil 3 and the magnet 5 in the accommodating portion 4s so as to be sandwiched between the outer wall portion 4A and the inner wall portion 4F. As shown in 2 (A), it is coupled to the base member 18 to form a housing together with the base member 18. However, the yoke 4 may be replaced with a cover made of a non-magnetic material such as austenitic stainless steel. In this case, the four inner wall portions 4F may be omitted.

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. 10B, 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. Then, 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) is the north pole and the outside is the south pole.

Next, the leaf spring 6 and the fixed side member RG will be described. FIG. 11 is a diagram illustrating a leaf spring 6. FIG. 11A is a top view of the upper leaf spring 16, and FIG. 11B is a top view of the lower leaf spring 26. FIG. 12 is a diagram illustrating an example of a connection structure between the lower leaf spring 26A and the coil 3 (extending portion 33A). Specifically, FIG. 12 (A) is an enlarged view of the portion T shown in FIG. 10 (A), and FIG. 12 (B) shows the portion T shown in FIG. 10 (A) when viewed from the X2 side. It is an enlarged view of the lower leaf spring 26A, the coil 3, and the lens holding member 2. In addition, in FIGS. 12A and 12B, in order to make the explanation easy to understand, the solder SD for joining the coil 3 and the lower leaf spring 26A is shown by cross-hatching, and the lens holding member 2 and the coil 3 are shown. The adhesive AD for adhering and fixing the lens is indicated by dot hatching. FIG. 13 is a diagram illustrating a base member 18 as a fixed side member RG. Specifically, FIG. 13A is an upward perspective view of the base member 18 in which the metal member 7 is embedded, and FIG. 13B is a state in which the lower leaf spring 26A and the lower leaf spring 26B are assembled. It is an upper perspective view of the base member 18.

The leaf spring 6 is made of a metal plate whose main material is a copper alloy. As shown in FIG. 1, the leaf spring 6 is arranged between the upper leaf spring 16 arranged between the lens holding member 2 and the yoke 4 (spacer 1), and between the lens holding member 2 and the base member 18. The lower leaf spring 26 is included. 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 (Z). The lens holding member 2 is supported in the air so as to be movable in the axial 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. A spacer 1 is arranged between the upper leaf spring 16 and the yoke 4. The spacer 1 is arranged so as to prevent the lens holding member 2 and the yoke 4 from colliding with each other when the lens holding member 2 moves in the Z1 direction. However, the spacer 1 may be omitted.

As shown in FIG. 11A, the upper leaf spring 16 has a substantially rectangular outer shape, and is fixed to the inner portion 16i as the movable side support portion fixed to the lens holding member 2 and the fixed side member RG. It includes an outer portion 16e as a fixed side support portion and four elastic arm portions 16g located between the inner portion 16i and the outer portion 16e. Specifically, two inner portions 16i are provided so as to face each other with the optical axis JD in between. The outer portion 16e has four corner portions 16b and four crosspieces 16r connecting two adjacent two of the four corner portions 16b. As shown in FIGS. 4 (A) and 4 (B), the corner portion 16b is sandwiched between the spacer 1 and the magnet 5 and fixed with an adhesive. Therefore, the spacer 1, the yoke 4, and the magnet 5 function as the fixed-side member RG.

When the upper leaf spring 16 is incorporated in the lens driving device 101, as shown in FIG. 4A, the inner portion 16i is attached to the pedestal portion 12d of the lens holding member 2 (see FIG. 5A). It will be placed. Then, the inner portion 16i and the pedestal portion 12d are fixed by the adhesive AD (see FIG. 4A), and the inner portion 16i is fixed to the lens holding member 2. As shown in FIG. 4B, the outer portion 16e is in contact with the upper surface (the surface on the Z1 side) of the magnet 5 at the corner portion 16b, and the spacer 1 (not shown in FIG. 4B) and the magnet 5 It is sandwiched between and fixed with an adhesive.

As shown in FIG. 11A, the upper leaf spring 16 is formed substantially symmetrically. Then, the inner portion 16i is fixed to the lens holding member 2, and the outer portion 16e is fixed to the yoke 4 via the spacer 1. Therefore, the upper leaf spring 16 can support the lens holding member 2 in the air in a well-balanced manner.

As shown in FIG. 11B, the lower leaf spring 26A and the lower leaf spring 26B are configured such that the inner side (the side facing the optical axis JD) has a substantially semicircular 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.

Each inner portion 26i of the lower leaf spring 26A and the lower leaf spring 26B includes two connecting plate portions 26h that are engaged with the lens holding member 2 as shown in FIG. 11B.

Specifically, the inner portion 26i of the lower leaf spring 26A includes a first connecting plate portion 26h1 and a second connecting plate portion 26h2. The inner portion 26i of the lower leaf spring 26B includes a third connecting plate portion 26h3 and a fourth connecting plate portion 26h4.

When the lower leaf spring 26 is incorporated into the lens driving device 101, each of the four protrusions 2p of the lens holding member 2 shown in FIG. 6 (A) is inside the lower leaf spring 26 shown in FIG. 11 (B). It is inserted and fitted into a round hole 26k as a second through portion provided in the connection plate portion 26h of the portion 26i. Then, the lower leaf spring 26 is adhesively fixed to the lens holding member 2 by the adhesive AD applied to the square hole 26j as the first through portion provided in the connecting plate portion 26h.

Specifically, the protrusion 2p includes the first protrusion 2p1 to the fourth protrusion 2p4 as shown in FIG. 7 (B), and the round hole 26k is the first as shown in FIG. 11 (B). 1 Round hole 26k1 to 4th round hole 26k4 are included. Then, as shown in FIG. 12A, the first protrusion 2p1 is inserted into the first round hole 26k1 provided in the first connection plate portion 26h1 of the inner portion 26i of the lower leaf spring 26A. Then, although not shown in FIG. 12A, the second protrusion 2p2 is inserted into the second round hole 26k2 provided in the second connection plate portion 26h2 of the inner portion 26i of the lower leaf spring 26A, and the second The three protrusions 2p3 are inserted into the third round hole 26k3 provided in the third connection plate portion 26h3 of the inner portion 26i of the lower leaf spring 26B, and the fourth protrusion 2p4 is the inner portion 26i of the lower leaf spring 26B. It is inserted into the fourth round hole 26k4 provided in the fourth connection plate portion 26h4.

As shown in FIG. 11B, the square hole 26j includes a first square hole 26j1 to a fourth square hole 26j4. The square hole 26j is configured so that a part of the bottom surface (the surface on the Z2 side) of the lens holding member 2 is exposed through the square hole 26j when the lower leaf spring 26 is assembled to the lens holding member 2. ing. On top of that, the lower leaf spring 26A has an adhesive AD applied to the first square hole 26j1 (see FIG. 12A) and an adhesive AD applied to the second square hole 26j2 (see FIG. 12A). It is adhesively fixed to the lens holding member 2 by (not shown). Similarly, the lower leaf spring 26B has an adhesive AD (not shown) applied to the third square hole 26j3 and an adhesive AD (not shown) applied to the fourth square hole 26j4. ) To be adhesively fixed to the lens holding member 2. In this way, 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.

Next, the connection structure between the coil 3 (extending portion 33) and the lower leaf spring 26 will be described. Hereinafter, the relationship between the lower leaf spring 26A, the lens holding member 2 and the coil 3 will be mainly described. However, the description regarding the lower leaf spring 26A also applies to the lower leaf spring 26B.

As shown in FIGS. 12A and 12B, the connecting plate portion 26h of the inner portion 26i of the lower leaf spring 26A is a bottom surface of the lens holding member 2 when the lens driving device 101 is assembled. It faces the surface on the Z2 side). Specifically, the surface of the connecting plate portion 26h on the Z1 side is in contact with the end surface (the surface on the Z2 side) of the raised portion 2r that rises in the Z2 direction from the bottom surface of the lens holding member 2. It is arranged so as to be overlapped with the end face of the raised portion 2r. Then, as shown in FIG. 12B, the insertion portion 33k of the extending portion 33A of the coil 3 is an image pickup element of the surface of the inner portion 26i of the lower leaf spring 26A on the subject side and the flange portion 52 of the lens holding member 2. It extends through between the side (Z2 side) surface.

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

The lower leaf spring 26A and the extending portion 33A of the coil 3 are electrically and mechanically connected by a solder SD. Specifically, the lower leaf spring 26A is generated by the adhesive AD applied to the first square hole 26j1 (see FIG. 12 (A)) and the second square hole 26j2 (not visible in FIG. 12 (A)). After being adhesively fixed to the lens holding member 2 (raised portion 2r), it extends to the surface of the soldered portion 26s (see FIG. 11B) in the first connecting plate portion 26h1 on the image sensor side (Z2 side). The solder paste is applied so as to come into contact with the winding portion 33m of the portion 33A. FIG. 11B shows the soldered portion 26s, which is a portion to which the solder paste is applied, by dot hatching. Then, the solder paste is heated and melted by the laser beam, and the lower leaf spring 26A and the extending portion 33A are joined by the solder SD. From the application of the solder paste to the joining by the solder SD, a series of operations are performed with the lens holding member 2 turned upside down so that the holding portion 72 projects vertically upward. Therefore, the solder paste melted by the laser beam can be appropriately held at a desired position (above the first connecting plate portion 26h1) even when it has fluidity.

As shown in FIG. 11B, the outer portion 26e of the lower leaf spring 26A includes two outer joint portions 26d engaged with the base member 18 and a connecting portion 26q connecting the two outer joint portions 26d. .. The through hole TH provided in the outer joint portion 26d of the lower leaf spring 26A fits with the projecting portion 18t (see FIG. 13A) provided on the upper surface of the base member 18. In this way, the outer portion 26e of the lower leaf spring 26A is positioned and fixed to the base member 18.

As shown in FIG. 11B, the lower leaf spring 26A and the lower leaf spring 26B are formed substantially symmetrically. The lower leaf spring 26A is connected to the lens holding member 2 by two connecting plate portions 26h (first connecting plate portion 26h1 and second connecting plate portion 26h2), and is connected to the base member 18 by two outer joint portions 26d. Has been done. The same applies to the lower leaf spring 26B. With this configuration, the lower leaf spring 26A and the lower leaf spring 26B can support the lens holding member 2 in the air in a well-balanced manner while being movable in the optical axis direction.

Next, the fixed side member RG will be described. The fixed-side member RG includes a spacer 1, a yoke 4, and a magnet 5 for fixing the upper leaf spring 16, and a base member 18 as a support member for fixing each of the lower leaf spring 26A and the lower leaf spring 26B.

The base member 18 is manufactured by injecting and molding a synthetic resin such as a liquid crystal polymer. In the present embodiment, as shown in FIG. 13A, the base member 18 is a member having a rectangular plate-like outer shape, and a circular opening 18k is formed in the center. Further, on the surface (upper surface) of the base member 18 on the subject side (Z1 side), six projecting portions 18t protruding upward are provided. The projecting portion 18t is inserted and fitted into a through hole TH (see FIG. 11B) 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 FIGS. 13 (A) and 13 (B), the projecting portion 18t is shown in a state where the tip is deformed after being heat-caulked. The projecting portion 18t may be cold crimped and fixed to the outer joint portion 26d.

As shown in FIG. 13A, a metal member 7 formed of a metal plate containing a material such as copper or iron or an alloy containing them as a main component is insert-molded and embedded in the base member 18. .. The metal member 7 includes a metal member 7A and a metal member 7B, and a part 7E of each of the metal member 7A and the metal member 7B is exposed on the upper surface (Z1 side surface) of the base member 18. Each of the metal member 7A and the metal member 7B, which are electrically insulated from each other, is electrically connected to a substrate (not shown) on which the image sensor is mounted. Further, the metal member 7A is electrically connected to the lower leaf spring 26A, and the metal member 7B is electrically connected to the lower leaf spring 26B. Further, 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. Therefore, the coil 3 can receive the electric current via the metal member 7 and the lower leaf spring 26.

Similar to the metal member 7, the base member 18 is also insert-molded and embedded with a connecting member 57 formed of a metal plate containing a material such as copper or iron or an alloy containing the same as a main component. As shown in FIG. 2A, a part of the connecting member 57 is exposed from the base member 18 at a position corresponding to the lower ends of the four corners of the yoke 4. 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 connecting member 57 and the lower ends of the four corners of the yoke 4 are welded to the yoke 4. It is fixed. The yoke 4 and the base member 18 may be fixed at least partially with an adhesive.

Next, with reference to FIGS. 14 (A) and 14 (B), the effect of the protrusion 2p protruding in the Z2 direction (downward) from the Z2 side surface (lower surface) of the lens holding member 2 will be described. FIG. 14A shows a connection structure between the lens holding member 2 having the first protrusion 2p1 which is one of the protrusions 2p and the lower leaf spring 26A having the first round hole 26k1. Note that FIG. 14A corresponds to FIG. 12A. FIG. 14B shows a connection structure of a lens holding member 2x not provided with the first protrusion 2p1 and a lower leaf spring 26Ax not provided with the first round hole 26k1 as a comparative example.

Specifically, as shown in FIG. 14A, the lower leaf spring 26A is located at a portion located between the holding portion 72A and the first square hole 26j1 when assembled to the lens holding member 2. It has a first round hole 26k1 for passing 1 protrusion 2p1. The first round hole 26k1 is at a first distance (width D1) from the X1 side edge of the first connection plate 26h1 and at a second distance from the X2 side edge of the first connection plate 26h1. It is formed at (width D2 (<width D1)). That is, the first connection plate portion 26h1 has a wide portion having a width D1 between the edge portion on the X1 side of the first connection plate portion 26h1 and the first protrusion 2p1, and the X2 side of the first connection plate portion 26h1. It has a narrow portion having a width D2 between the edge portion and the first protrusion 2p1. Further, the lower leaf spring 26A has a soldered portion 26s, which is a portion surrounded by a chained line, at a portion located between the holding portion 72A and the first protrusion 2p1 when assembled to the lens holding member 2. Have.

In this configuration, the adhesive AD applied to the first square hole 26j1 tries to spread in an arbitrary direction on the surface of the first connecting plate portion 26h1 on the Z2 side, but in the direction of the soldering portion 26s ( Spreading in the Y2 direction) is hindered by the first protrusion 2p1. Therefore, the first protrusion 2p1 makes it difficult for the adhesive AD to reach the soldered portion 26s.

Further, since the first protrusion 2p1 is formed at a position closer to the edge on the X2 side than the edge on the X1 side of the first connection plate portion 26h1, the adhesive AD passes through the narrow portion in the Y2 direction. The adhesive AD facilitates the movement of spreading in the Y2 direction through the wide portion as compared with the movement of spreading in the Y2 direction. This is because the width D1 of the wide portion is wider than the width D2 of the narrow portion. In this way, the first protrusion 2p1 makes it easier for the adhesive AD to spread toward the wide portion, thereby suppressing the adhesive AD from spreading toward the narrow portion, and as a result, the adhesive AD becomes It is possible to suppress reaching the soldered portion 26s.

On the other hand, in the connection structure between the lens holding member 2x not provided with the first protrusion 2p1 and the lower leaf spring 26Ax not provided with the first round hole 26k1, as shown in FIG. 14B, the first square hole 26j1 The adhesive AD applied to the place spreads in the direction of the soldering portion 26s (Y2 direction) and adheres to the soldering portion 26s. This is because there is no member that prevents the adhesive AD from spreading to the soldered portion 26s. Therefore, when soldering is subsequently performed between the winding portion 33m of the extending portion 33A and the first connecting plate portion 26h1x, a part of the solder SD is arranged so as to cover a part of the adhesive AD. It ends up. This arrangement results in a loss of reliability in joining the extending portion 33A and the first connecting plate portion 26h1x by soldering.

As can be seen from the comparison of the two connection structures described above, the first protrusion 2p1 was applied to the first square hole 26j1 before being soldered by the solder paste applied to the soldering portion 26s. It is possible to prevent the adhesive AD from spreading to the soldering portion 26s and adhering to the soldering portion 26s. Therefore, the first protrusion 2p1 can prevent insufficient soldering between the lower leaf spring 26A and the extending portion 33A.

As a result, the lens driving device 101 provided with the first protrusion 2p1 adheres to the soldering portion 26s, which is a portion to be bonded by the solder SD, while suppressing the adhesion of the adhesive AD to the soldering portion 26s. It enables close placement with the first square hole 26j1, which is a portion where adhesive fixing is performed by the agent AD. Therefore, in the lens driving device 101 provided with the first protrusion 2p1, even if the lower leaf spring 26A is elastically deformed when the lens driving device 101 is impacted by dropping or the like, the elastic deformation is soldered. It is possible to suppress the influence of the above on the joint portion to be small. This is because the joining of the extending portion 33A and the first connecting plate portion 26h1 by soldering is realized near the adhesive fixing portion between the lens holding member 2 and the first connecting plate portion 26h1 by the adhesive AD.

Further, in this configuration, since the lens holding member 2 and the lower leaf spring 26A can be joined without using fixing by caulking, it is possible to prevent the generation of resin waste due to caulking, and further, the adhesive AD can be effectively used. By being able to do so, the reliability of joining can be improved.

Next, another example of the connection structure between the lower leaf spring 26 and the coil 3 (extending portion 33A) will be described with reference to FIG. FIG. 15 shows a connection structure between a lens holding member 2M having a protrusion 2p and a lower leaf spring 26M having a round hole 26k. Note that FIG. 15 corresponds to FIG. 14 (A).

The lens holding member 2M of FIG. 15 mainly has a holding portion 72M protruding in the direction perpendicular to the optical axis direction, and the lens holding member 2M of FIG. 14A has a holding portion 72A protruding in the optical axis direction. Different from 2. Further, the lower leaf spring 26M of FIG. 15 is different from the lower leaf spring 26A of FIG. 14 (A) having a rectangular first square hole 26j1 mainly in that it has a trapezoidal square hole 26Mj.

Also in the configuration shown in FIG. 15, the adhesive AD applied to the square hole 26Mj tries to spread in an arbitrary direction on the surface of the connecting plate portion 26h on the Z2 side, but in the direction of the soldering portion 26s ( Spreading in the Y2 direction) is hindered by the protrusion 2p. Therefore, the protrusion 2p makes it difficult for the adhesive AD to reach the soldered portion 26s.

Further, since the protrusion 2p is formed at a position closer to the edge on the X2 side than the edge on the X1 side of the connection plate portion 26h, the adhesive AD passes through the narrow portion of the width D2 in the Y2 direction. It facilitates the spread of the adhesive AD in the Y2 direction through the wide portion of the width D1 (> width D2) as compared to the spread. In this way, the protrusion 2p makes it easier for the adhesive AD to spread toward the wide portion, so that the adhesive AD can be prevented from spreading toward the narrow portion, and by extension, the adhesive AD is soldered. It is possible to suppress reaching the portion 26s.

With the above configuration, the protrusion 2p is soldered by spreading the adhesive AD applied to the square hole 26Mj to the soldering portion 26s before soldering with the solder paste applied to the soldering portion 26s. It is possible to prevent the soldering portion 26s from adhering to the soldering portion 26s. Therefore, the protrusion 2p can prevent insufficient soldering between the lower leaf spring 26M and the extending portion 33A (winding portion 33m).

As a result, the lens driving device 101 provided with the protrusion 2p suppresses the adhesion of the adhesive AD to the soldering portion 26s, while suppressing the adhesion of the adhesive AD to the soldering portion 26s, and the soldering portion 26s and the adhesive AD which are the portions to be joined by the solder SD. It enables close placement with the square hole 26Mj, which is a portion where adhesive fixing is performed. Therefore, in the lens driving device 101 provided with the protrusion 2p, even if the lower leaf spring 26M is elastically deformed when the lens driving device 101 is impacted by dropping or the like, the elastic deformation is joined by soldering. The influence on the part can be suppressed to a small extent. This is because the bonding between the extending portion 33A and the connecting plate portion 26h by soldering is realized near the adhesive fixing portion between the lens holding member 2M and the connecting plate portion 26h by the adhesive AD.

Further, in this configuration, since the lens holding member 2M and the lower leaf spring 26M can be joined without using fixing by caulking, it is possible to prevent the generation of resin waste due to caulking, and further, the adhesive AD can be effectively used. By being able to do so, the reliability of joining can be improved.

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 3. A lower leaf spring 26, which is arranged so as to connect the base member 18 and the lens holding member 2 and supports the lens holding member 2 so as to be movable in the optical axis direction, is provided. The coil 3 has a winding portion 13 as a coil main body portion arranged outside the lens holding member 2, and an extending portion 33 connected to the winding portion 13. As shown in FIG. 11B, the lower leaf spring 26A, which is one of the lower leaf springs 26, is attached to the inner portion 26i as the movable side support portion fixed to the lens holding member 2 and the base member 18. It has an outer portion 26e as a fixed side support portion to be fixed, and an elastic arm portion 26g provided between the inner portion 26i and the outer portion 26e.

Then, as shown in FIG. 14A, a holding portion 72A as a protruding portion is provided at one end of the lens holding member 2. A part of the extending portion 33A of the coil 3 is wound around the holding portion 72A to form the winding portion 33m. The winding portion 33m and the inner portion 26i are soldered. The inner portion 26i of the lower leaf spring 26A is formed with a first square hole 26j1 as a first penetrating portion and a first round hole 26k1 as a second penetrating portion. The first round hole 26k1 is arranged between the soldered portion 26s of the inner portion 26i and the first square hole 26j1. The lens holding member 2 is formed with a first protrusion 2p1 that is inserted into the first round hole 26k1. Then, the inner portion 26i of the lower leaf spring 26A and the lens holding member 2 are fixed by the adhesive AD applied to the first square hole 26j1 and the lens holding member 2 exposed from the first square hole 26j1.

With this configuration, the lens driving device 101 makes contact between the adhesive AD that adheres and fixes the lens holding member 2 and the lower leaf spring 26 and the bonding material such as the solder SD that bonds the coil 3 and the lower leaf spring 26. Can be suppressed. However, the adhesive AD and the solder SD may be partially in contact with each other within a range in which the winding portion 33m of the coil 3 and the inner portion 26i of the lower leaf spring 26 are not sufficiently soldered.

The first penetration is preferably a non-circular hole. This is because the non-circular hole can take a shape corresponding to the shape of the connecting plate portion 26h, and the opening area can be made larger than that of the circular hole. However, the first penetrating portion may be a circular hole.

The first penetrating portion is more preferably a substantially square hole such as the first square hole 26j1. This is because the substantially quadrangular hole can have a larger opening area than the circular hole, as described above. Further, the substantially square hole is easier to create than the hole having a complicated shape. The substantially quadrangular hole may be a trapezoidal hole as shown in FIG.

The adhesive AD is preferably applied so as to adhere to the round hole 26k and the protrusion 2p as the second penetrating portion. The adhesive AD applied and cured in this way can enhance the reliability of joining the lens holding member 2 and the lower leaf spring 26A (connecting plate portion 26h).

The inner portion 26i of the lower leaf spring 26A as the movable side support portion preferably has a first square hole 26j1 as a first penetration portion and a first penetration portion as a second penetration portion, as shown in FIG. 14 (A). It has a first connection plate portion 26h1 provided with a round hole 26k1 and a soldering portion 26s. The width dimension (width D2) of the narrow portion between the edge portion on the side close to the soldering portion 26s and the first round hole 26k1 of the first connection plate portion 26h1 is on the side far from the soldering portion 26s. It is configured to be smaller than the width dimension (width D1) of the wide portion between the edge portion and the first round hole 26k1. With this configuration, the first connecting plate portion 26h1 can suppress the adhesive AD from flowing into the soldering portion 26s.

In the method for manufacturing the lens driving device 101 according to the embodiment of the present invention, as shown in FIG. 14A, a part of the lens holding member 2 is exposed from the first square hole 26j1 as the first penetrating portion. In addition, a stacking step in which the lower leaf spring 26A is overlapped with the lens holding member 2 so that the first protrusion 2p1 penetrates the first round hole 26k1 as the second penetration portion, and the first square holes 26j1 and the first An adhesive AD is applied to the lens holding member 2 exposed from the square hole 26j1, and the inner portion 26i as the movable side support portion of the lower leaf spring 26A and the lens holding member 2 are bonded and fixed. It has a soldering step in which the winding portion 33m and the soldering portion 26s are soldered.

In this manufacturing method, the contact between the adhesive AD and the bonding material such as solder SD is suppressed by the first protrusion 2p1. Therefore, this manufacturing method can increase the reliability of joining the extending portion 33A by soldering and the first connecting plate portion 26h1.

Further, the above-mentioned manufacturing method preferably includes a step of adhering the adhesive AD to the first round hole 26k1 and the first protrusion 2p1 as the second through portion in the fixing step. By having this step, the above-mentioned manufacturing method can further increase the adhesive strength between the inner portion 26i of the lower leaf spring 26A and the lens holding member 2.

The preferred embodiment of the present invention has been described in detail above. However, the present invention is not limited to the above-described embodiments. Various modifications and substitutions can be applied to the embodiments described above 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 conflict.

For example, in the above embodiment, the holding portion 72 is composed of a protruding portion that protrudes from one end of the lens holding member 2 (flange portion 52) in the optical axis direction or in the direction perpendicular to the optical axis direction. , Not limited to this configuration. The holding portion 72 as the protruding portion may project in a direction inclined with respect to the optical axis direction, for example.

Further, in the above embodiment, the flange portion 52 is provided with two notches 52k through which the extending portion 33 of the coil 3 is passed, but if the winding portion 13 of the coil 3 can be held, three notches are provided. The above notch may be provided.

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. Although the configuration is used, the present invention is not limited to this configuration. When the present invention is applied to, for example, a lens driving device having a camera shake correction function, the upper leaf spring 16 is divided into two, one of which is electrically connected to the extending portion 33A, and the other. May include a configuration in which is electrically connected to the extension 33B. In this configuration, the upper leaf spring 16 is arranged so as to connect the magnet holder (not shown) as a support member and the lens holding member 2, and supports the lens holding member 2 so as to be movable in the optical axis direction. It is configured to do. 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 movable in the direction. In this configuration, a flange portion having a notch may be provided on the upper end portion side (Z1 side) of the lens holding member 2. Further, the holding portion 72 as a protruding portion may be provided at the upper end portion of the lens holding member 2 on which the upper leaf spring 16 is arranged.

In the above embodiment, the coil 3 is wound in an octagonal ring on the outer peripheral surface side of the lens holding member 2. However, the present invention is not limited to this configuration. The coil 3 may be an oval-shaped coil held on the side surface of the lens holding member 2. Specifically, the coil 3 may be four oval coils held on each of the four side surfaces of the lens holding member 2, and two of the four side surfaces of the lens holding member 2 facing each other. It may be two oval coils held in each.

Further, in the above embodiment, the housing composed of the yoke 4 and the base member 18 accommodates the entire lens holding member 2. However, a part (for example, the upper part) of the lens holding member 2 may be exposed to the outside from the housing (yoke 4).

1 ... Spacer 2, 2M, 2x ... Lens holding member 2p ... Protrusion 2p1 ... First protrusion 2p2 ... Second protrusion 2p3 ... Third protrusion 2p4 ... 4th protrusion 2r ... raised part 3 ... coil 4 ... yoke 4A ... outer wall part 4B ... upper surface part 4F ... inner wall part 4s ... storage part 5 ... magnet 6・ ・ ・ Leaf springs 7, 7A, 7B ・ ・ ・ Metal member 12 ・ ・ ・ Cylindrical part 12d ・ ・ ・ Pedestal part 12dh ・ ・ ・ Recessed part 12h ・ ・ ・ Eave part 12j ・ ・ ・ Coil support part 13 ・ ・ ・Winding part 16 ... Upper leaf spring 16b ... Corner part 16e ... Outer part 16g ... Elastic arm part 16i ... Inner part 16r ... Crosspiece 18 ... Base member 18k ...・ Opening 18t ・ ・ ・ Protruding part 26, 26A, 26Ax, 26B, 26M ・ ・ ・ Lower leaf spring 26d ・ ・ ・ Outer joint part 26e ・ ・ ・ Outer part 26g ・ ・ ・ Elastic arm part 26h ・ ・ ・ Connection plate Part 26h1, 26h1x ... 1st connection plate part 26h2 ... 2nd connection plate part 26h3 ... 3rd connection plate part 26h4 ... 4th connection plate part 26i ... Inner part 26j, 26Mj ...・ Square hole 26j1 ・ ・ ・ 1st square hole 26j2 ・ ・ ・ 2nd square hole 26j3 ・ ・ ・ 3rd square hole 26j4 ・ ・ ・ 4th square hole 26k ・ ・ ・ Round hole 26k1 ・ ・ ・ 1st round hole 26k2 ... 2nd round hole 26k3 ... 3rd round hole 26k4 ... 4th round hole 26q ... Connecting part 26s ... Soldering part 33, 33A, 33B ... Extended part 33k ...・ Insertion part 33m ・ ・ ・ Winding part 52 ・ ・ ・ Flange part 52k ・ ・ ・ Notch part 57 ・ ・ ・ Connecting members 72, 72A, 72B, 72M ・ ・ ・ Holding part 101 ・ ・ ・ Lens drive device AD ・ ・ ・Adhesive JD ・ ・ ・ Optical axis MK ・ ・ ・ Drive mechanism RG ・ ・ ・ Fixed side member SD ・ ・ ・ Solder TH ・ ・ ・ Through hole

Claims (9)

Support members and
A lens holding member that can hold the lens body and
The coil held by the lens holding member and
With the magnet facing the coil,
A lens driving device including a leaf spring which is arranged so as to connect the support member and the lens holding member and supports the lens holding member so as to be movable in the optical axis direction.
The coil has a coil main body portion arranged outside the lens holding member and an extending portion connected to the coil main body portion.
The leaf spring is provided between the movable side support portion fixed to the lens holding member, the fixed side support portion fixed to the support member, and the movable side support portion and the fixed side support portion. Has an elastic arm and
The lens holding member is provided with a protrusion.
A part of the extending portion of the coil is wound around the protruding portion to form a winding portion.
The wound portion and the soldered portion of the movable side support portion are soldered.
A first penetrating portion and a second penetrating portion are formed on the movable side support portion of the leaf spring.
The second penetrating portion is arranged between the soldered portion of the movable side support portion and the first penetrating portion.
The lens holding member is formed with a protrusion to be inserted into the second penetrating portion.
The movable side support portion and the lens holding member are fixed by an adhesive applied to the first penetrating portion and the lens holding member exposed from the first penetrating portion.
A lens drive device characterized by this. The first penetrating portion is a non-circular hole.
The lens driving device according to claim 1. The first penetrating portion is a substantially quadrangular hole.
The lens driving device according to claim 2. The adhesive is attached to the second penetrating portion and the protruding portion.
The lens driving device according to any one of claims 1 to 3. The movable side support portion has a connection plate portion provided with the first penetration portion, the second penetration portion, and the soldering portion.
In the connection plate portion, the width dimension between the edge portion on the side close to the soldered portion and the second penetrating portion is smaller than the width dimension between the edge portion on the far side and the second penetrating portion. ,
The lens driving device according to any one of claims 1 to 4. Support members and
A lens holding member that can hold the lens body and
The coil held by the lens holding member and
With the magnet facing the coil,
A leaf spring that is arranged so as to connect the support member and the lens holding member and supports the lens holding member so as to be movable in the optical axis direction is provided.
The coil has a coil main body portion arranged outside the lens holding member and an extending portion connected to the coil main body portion.
The leaf spring is provided between the movable side support portion fixed to the lens holding member, the fixed side support portion fixed to the support member, and the movable side support portion and the fixed side support portion. Has an elastic arm and
The movable side support portion has a soldered portion, a first penetrating portion, and a second penetrating portion located between the soldered portion and the first penetrating portion.
The lens holding member is formed with a protrusion that penetrates the second penetrating portion.
The lens holding member is provided with a protrusion.
A part of the extending portion of the coil is wound around the protruding portion to form a winding portion.
The wound portion and the soldered portion of the movable side support portion are soldered.
It is a manufacturing method of a lens drive device.
A stacking step in which the leaf spring is superposed on the lens holding member so that the lens holding member is exposed from the first penetrating portion and the protrusion penetrates the second penetrating portion.
An adhesive is applied to the first penetrating portion and the lens holding member exposed from the first penetrating portion, and the movable side support portion and the lens holding member are adhered and fixed.
A soldering process in which the winding portion and the soldering portion are soldered,
A method for manufacturing a lens driving device, which comprises. In the fixing step, the step of adhering the adhesive to the second penetrating portion and the protruding portion is included.
The method for manufacturing a lens driving device according to claim 6. The movable side support portion has a connection plate portion provided with the first penetration portion, the second penetration portion, and the soldering portion.
In the connection plate portion, the width dimension between the edge portion on the side close to the soldered portion and the second penetrating portion is smaller than the width dimension between the edge portion on the far side and the second penetrating portion. ,
The method for manufacturing a lens driving device according to claim 6 or 7. The lens driving device according to any one of claims 1 to 5.
With the lens body
It has an image sensor that faces the lens body.
The camera module.