WO2020026515A1 - Lens drive device and camera module - Google Patents

Abstract

A lens drive device (101) comprises: drive magnets (5), including magnets (5A, 5B, 5C) which face a first coil (3A), and magnets (5A, 5B, 5D) which face a second coil (3B); a magnet holder (MH) for holding the drive magnets (5); leaf springs (6) that support, with respect to the magnet holder (MH), a first lens holding member (2A) and a second lens holding member (2B) so that the same can move in the optical axis direction; a fixing side member (RG) provided with a coil (9) that faces the drive magnets (5) in the optical axis direction; and a wire (8) for supporting the magnet holder (MH) with respect to the fixing side member (RG) so that the magnet holder (MH) can move in a direction intersecting the optical axis direction. The magnets (5A-5D) constituting the drive magnets (5) are arranged so as to surround the first lens holding member (2A) and the second lens holding member (2B). The magnets (5A, 5B) face each other with the first lens holding member (2A) therebetween.

Description

Lens drive device and camera module

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 camera module including two lens driving devices juxtaposed has been known (for example, see Patent Document 1). Each of the two lens driving devices has an automatic focus adjustment function and an image stabilization function (camera shake correction function).

ハ ウ ジ ン グ Generally, the housing (case) of a lens driving device having a camera shake correction function is formed of a non-magnetic metal member. This is to prevent magnetic force (attraction) from acting between the magnet and the case.

JP 2017-194679 A

However, when two such lens driving devices are arranged side by side, one of the lens driving devices is affected by the magnetic field of the magnet in the other lens driving device disposed next to the lens driving device, and the lens driving device has a lens shake correction function and the like. The adjustment function may not be properly executed. This is because a case formed of a non-magnetic metal member cannot suppress a magnetic field leakage to the outside.

Therefore, it is desirable to improve the reliability of the lens adjustment function of the lens driving device including the plurality of lens holding members juxtaposed.

A lens driving device according to an embodiment of the present invention includes a first lens holding member that can hold a first lens body and is provided with a first coil, and is arranged alongside the first lens holding member. A second lens holding member capable of holding a two-lens body and provided with a second coil; a magnet facing the first coil in a direction intersecting the optical axis direction; and a magnet opposing the first coil in a direction intersecting the optical axis direction. A drive magnet including a magnet opposed to the second coil, a magnet holder for holding the drive magnet, and a first support portion for supporting the first lens holding member movably in the optical axis direction with respect to the magnet holder. A first support body including a second support portion for supporting the second lens holding member movably in the optical axis direction with respect to the magnet holder; and a fixed side coil facing the drive magnet in the optical axis direction. A magnet, comprising: a fixed member provided; and a second support for supporting the magnet holder movably with respect to the fixed member in a direction intersecting the optical axis direction. Is disposed so as to surround the first lens holding member and the second lens holding member, and at least two magnets constituting the driving magnet are opposed to each other with the first lens holding member interposed therebetween.

The above-described lens driving device includes a plurality of lens holding members juxtaposed, so that the reliability of the lens adjustment function can be improved.

It is a perspective view of a lens drive device. FIG. 3 is an exploded perspective view of the lens driving device. It is an exploded perspective view of a lower member. It is an exploded perspective view of a movable side member. It is an exploded perspective view of a fixed side member. It is a perspective view of a coil, an upper leaf spring, and a metal member. It is a schematic diagram of a lens drive device. It is a perspective view of a coil, an upper leaf spring, and a metal member. It is an exploded perspective view of a movable side member.

Hereinafter, a lens driving device 101 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the lens driving device 101. FIG. 2 is an exploded perspective view of the lens driving device 101, and shows a state where the case 4 is separated from the lower member LB. FIG. 3 is an exploded perspective view of the lower member LB, showing a state in which the movable member MB is separated from the fixed member RG. FIG. 4 is an exploded perspective view of the movable member MB. FIG. 5 is an exploded perspective view of the fixed side member RG.

As shown in FIG. 2, the lens driving device 101 includes a case 4 that is a part of the fixed member RG, and a lower member LB.

As shown in FIG. 3, the lower member LB includes the movable member MB, the wire 8, the coil substrate 17, and the base member 18, which are part of the fixed member RG.

As shown in FIG. 4, the movable member MB includes a lens holding member 2 capable of holding a lens body (not shown), and an axial drive for moving the lens holding member 2 along an optical axis JD related to the lens body. It includes a mechanism MK, a leaf spring 6 as a first support that movably supports the lens holding member 2 along the optical axis JD, and a magnet holder MH to which the leaf spring 6 is fixed. The lens body is, for example, a cylindrical lens barrel provided with at least one lens, and is configured so that a central axis thereof is along the optical axis JD.

In the present embodiment, the lens holding member 2 has a first lens holding member 2A that can hold a first lens body (not shown) and a second lens that can hold a second lens body (not shown). Including the lens holding member 2B.

The axial drive mechanism MK includes a coil 3 wound in an octagonal ring around the lens holding member 2 and four magnets 5A to 5D arranged to face the coil 3. Hereinafter, the four magnets 5A to 5D for driving the lens holding member 2 are collectively referred to as “drive magnets 5”. In the present embodiment, all of the four magnets 5A to 5D constituting the driving magnet 5 are arranged along an annular region surrounding both the first lens holding member 2A and the second lens holding member 2B. That is, the magnet that constitutes the driving magnet 5 is not disposed between the first lens holding member 2A and the second lens holding member 2B.

Specifically, the axial drive mechanism MK includes a first drive mechanism that moves the first lens holding member 2A along a direction parallel to the optical axis JD1 (a direction parallel to the Z axis) for the first lens body, and And a second driving mechanism that moves the second lens holding member 2B along a direction parallel to the optical axis JD2 (a direction parallel to the Z axis) with respect to the second lens body. Note that the optical axis JD1 and the optical axis JD2 are parallel.

The first drive mechanism includes a first coil 3A wound around the first lens holding member 2A, and three magnets 5A, 5B, and 5C arranged to face the first coil 3A. Specifically, the first driving mechanism is configured to control the left side (−X side) of the first coil 3A and the two magnets 5A and 5B arranged to face the first coil 3A in a direction parallel to the Y axis. ), And a magnet 5C arranged to face the first coil 3A in a direction parallel to the X axis.

The second driving mechanism includes a second coil 3B wound around the second lens holding member 2B, and three magnets 5A, 5B, and 5D arranged to face the second coil 3B. Specifically, the second drive mechanism is configured to control the right side (+ X side) of each of the second coil 3B and the two magnets 5A and 5B arranged to face the second coil 3B in a direction parallel to the Y axis. And a magnet 5D arranged to face the second coil 3B in a direction parallel to the X-axis.

The magnets 5A and 5B are included in each of the first drive mechanism and the second drive mechanism. That is, the magnet 5A is shared by each of the first drive mechanism and the second drive mechanism, and the magnet 5B is shared by each of the first drive mechanism and the second drive mechanism. The magnets 5A and 5B as common magnets extend along a direction parallel to the X axis. The magnets 5C and 5D extend along a direction parallel to the Y axis orthogonal to the X axis.

The magnet holder MH is configured to hold the magnets 5A to 5D. In the present embodiment, the magnet holder MH is formed by injection molding a synthetic resin such as a liquid crystal polymer (LCP). As shown in FIG. 4, the magnet holder MH is a rectangular frame, and the magnets 5A to 5D are arranged inside the outer frame. In the present embodiment, the magnet holder MH includes the wall MHw provided between the first lens holding member 2A and the second lens holding member 2B, but the wall MHw may be omitted. .

(2) As shown in FIG. 2, the fixed side member RG includes the case 4 and the base member 18 in which the metal member 7 is embedded. The metal member 7 is formed of a conductive material, and enables current to flow between the coil 3 and the coil 9 (see FIG. 5) and the outside. In the present embodiment, as shown in FIG. 5, the metal member 7 includes ten independent metal members 7A to 7J formed of copper, iron, an alloy mainly containing them, or the like. Each of metal members 7A to 7H includes terminals 7AT to 7HT. The metal members 7I and 7J function as reinforcing members.

(4) As shown in FIG. 4, the leaf spring 6 as the first support supports the lens holding member 2 movably in a direction parallel to the optical axis JD with respect to the magnet holder MH. Specifically, the leaf spring 6 supports the first lens holding member 2A with respect to the magnet holder MH so as to be movable in a direction parallel to the optical axis JD1. A second support portion that supports the two-lens holding member 2B movably in a direction parallel to the optical axis JD2 is included.

In the present embodiment, as shown in FIG. 4, the leaf spring 6 includes an upper leaf spring 16 disposed on the + Z side of the magnet holder MH and a lower leaf spring 26 disposed on the −Z side of the magnet holder MH. Including. The upper leaf spring 16 includes upper leaf springs 16A and 16B for the first lens holding member 2A, and upper leaf springs 16C and 16D for the second lens holding member 2B. The first supporting portion includes upper leaf springs 16A and 16B and a −X side portion (left side portion 26L) of lower leaf spring 26. The second supporting portion includes upper leaf springs 16C and 16D and a + X side portion (right portion 26R) of lower leaf spring 26.

As shown in FIG. 3, the wire 8 is a suspension wire that functions as a second support that movably supports the movable member MB in a direction that is not parallel to the optical axis JD with respect to the fixed member RG. . For example, the wire 8 movably supports the magnet holder MH in a direction perpendicular to the optical axis JD with respect to the base member 18 as the fixed side member RG. In the present embodiment, the wires 8 include four wires 8A to 8D (see FIG. 6) formed of a conductive and highly elastic metal material such as a copper alloy. Each of the four wires 8A to 8D has its base end (-Z side end) fixed to the metal member 7 by soldering or the like, and its tip end (+ Z side end) by soldering or the like. It is fixed to the upper leaf spring 16. With this configuration, the movable-side member MB includes the four wires 8A to 8D, and the first direction (the direction parallel to the X axis) and the second direction (the direction parallel to the Y axis) that are perpendicular to the optical axis JD. ) Is movably supported.

(5) The coil substrate 17 includes the coil 9 constituting the radial drive mechanism RK, as shown in FIG. In the present embodiment, the coil 9 as the fixed-side coil is a laminated coil and includes four coils 9A to 9D as shown in FIG.

The radial drive mechanism RK includes a third drive mechanism that moves the magnet holder MH along a first direction perpendicular to the optical axis JD with respect to the lens body, and a second drive mechanism that moves the magnet holder MH along a second direction perpendicular to the optical axis JD with respect to the lens body. A fourth drive mechanism for moving the magnet holder MH is included.

The third driving mechanism is disposed so as to face the coils 9C and 9D as the third coils provided on the coil substrate 17 and the coils 9C and 9D in the third direction (the direction parallel to the Z axis). And magnets 5C and 5D. Specifically, the third drive mechanism includes coils 9C and 9D, and two magnets 5C and 5D arranged to face each of the two coils 9C and 9D in the third direction.

(4) The fourth drive mechanism includes coils 9A and 9B as fourth coils provided on the coil substrate 17, and magnets 5A and 5B arranged to face the coils 9A and 9B in the third direction. Specifically, the fourth drive mechanism includes coils 9A and 9B, and two magnets 5A and 5B arranged to face each of the two coils 9A and 9B in the third direction.

The lens driving device 101 has, for example, 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 includes, for example, a substrate, a lens driving device 101, a lens body mounted on the lens holding member 2, and an image sensor mounted on the substrate so as to face the lens body. As shown in FIG. 6, the coil 3 is connected to a power source via the upper leaf spring 16, the wire 8, the metal member 7, and the substrate. The coil 9 is connected to a power source via the metal member 7 and the substrate, as shown in FIG. Therefore, the upper leaf spring 16, the wire 8, and the metal member 7 are formed of a conductive material. When a current flows through the coil 3, the axial driving mechanism MK generates an electromagnetic force along a direction parallel to the optical axis JD. Similarly, when a current flows through the coil 9, the radial driving mechanism RK generates an electromagnetic force along a direction perpendicular to the optical axis JD.

The lens driving device 101 uses the electromagnetic force along the direction parallel to the optical axis JD to move the lens holding member 2 along the direction parallel to the optical axis JD on the + Z side (subject side) of the image sensor. This realizes an automatic focus adjustment function which is an example of the lens adjustment function. Specifically, the lens driving device 101 enables macro photography by moving the lens holding member 2 in a direction away from the image sensor, and enables infinity shooting by moving the lens holding member 2 in a direction closer to the image sensor. I have to.

The lens driving device 101 uses the electromagnetic force along the direction perpendicular to the optical axis JD to move the lens holding member 2 along the direction perpendicular to the optical axis JD on the + Z side (subject side) of the image sensor. This realizes a camera shake correction function which is another example of the lens adjustment function.

Next, the first lens holding member 2A will be described. The description about the first lens holding member 2A also applies to the second lens holding member 2B. The first lens holding member 2A is formed by injection molding a synthetic resin such as a liquid crystal polymer (LCP). Specifically, as shown in FIG. 4, the first lens holding member 2 </ b> A has a cylindrical portion 12 having a through hole formed so as to penetrate along the optical axis JD <b> 1, and an imaging element of the cylindrical portion 12. And a flange portion (flange portion) 52 protruding radially outward from the outer peripheral surface at the end on the side (−Z side).

１The first lens body is fixed to the inner peripheral surface of the cylindrical portion 12 with an adhesive. Therefore, no thread groove is formed on the inner peripheral surface of the cylindrical portion 12. However, a thread groove may be provided on the inner peripheral surface of the cylindrical portion 12 so that the first lens body is screwed. Further, the cylindrical portion 12 is provided with a pedestal portion 12d on the end surface on the subject side. The inner portion 16i of the upper leaf spring 16 is placed on the pedestal portion 12d.

コ イ ル A coil support portion 12j as an outer wall portion for supporting the first coil 3A from inside is provided on the outer peripheral surface of the cylindrical portion 12. The coil supporting portion 12j has an overall octagonal outer shape in a top view so as to support the octagonal first coil 3A. On the object side of the coil support portion 12j, an eave portion 12h protruding radially outward so as to face the flange portion 52 in a direction parallel to the optical axis JD1 is formed. The wound portion 13 of the first coil 3A is supported by the coil support portion 12j and is sandwiched between the eaves portion 12h and the flange portion 52 in a direction parallel to the optical axis JD1 so that the first lens holding member 2A It is wound in an octagonal ring around the outer peripheral surface. In this configuration, the eave portion 12h and the flange portion 52 function as a regulating portion that regulates the movement of the winding portion 13 in a direction parallel to the optical axis JD1.

The first lens holding member 2A includes two rectangular convex protrusions 72 and four round convex protrusions 2t protruding upward (+ Z direction) from the surface on the subject side (+ Z side). .

The protruding portion 72 includes a protruding portion 72A corresponding to the wire on the winding start side of the first coil 3A (the winding portion 13) and a protruding portion corresponding to the winding end wire of the first coil 3A (the winding portion 13). 72B. Both ends of the wire constituting the first coil 3 </ b> A are wound and held around the protrusion 72. The winding of the wire is performed using, for example, an automatic winding machine.

The projecting portion 2t includes two projecting portions 2t corresponding to the upper leaf spring 16A and two projecting portions 2t corresponding to the upper leaf spring 16B. The inner portions 16i of the upper leaf springs 16A and 16B are mounted and fixed to the protruding portions 2t. As shown in FIG. 4, the fixing of the inner portion 16i is realized by hot or cold caulking the protruding portion 2t inserted into the through hole H1 formed in the inner portion 16i. In FIG. 4, the protruding portion 2t is shown in a state in which the tip has been deformed after being subjected to heat caulking or cold caulking.

Next, the axial drive mechanism MK will be described. As shown in FIG. 4, the axial drive mechanism MK includes a coil 3 and a drive magnet 5 arranged to face the coil 3. Then, the axial driving mechanism MK generates a driving force (thrust) by a current flowing through the coil 3 and a magnetic field generated by the driving magnet 5, and moves the lens holding member 2 up and down along the optical axis JD. it can.

The coil 3 is formed by winding a conductive wire around the outer periphery of the lens holding member 2. The coil 3 includes a winding portion 13 formed by being wound in an octagonal ring, and an extension portion 33 that extends from the winding portion 13 and is wound around the protrusion 72. FIG. 4 does not show a detailed winding state of a conductive wire whose surface is covered with an insulating material for the winding portion 13 for clarity. The same applies to other drawings illustrating the winding portion 13.

The extension portion 33 includes an extension portion 33 </ b> A connected to an end portion (a winding start portion) of the winding portion 13 located on the inner periphery side of the winding portion 13 on the winding start side of the coil 3, and a winding portion of the coil 3. And an extension portion 33B connected to an end portion (end portion of winding) of the winding portion 13 located on the outer peripheral side of the winding portion 13 on the end side.

巻 The winding portion 13 of the coil 3 wound around the outer periphery of the lens holding member 2 is disposed at a position surrounding the lens holding member 2. The wound portion 13 is held on the subject side of the flange portion 52 so as to be sandwiched between the eave portion 12h and the flange portion 52 while being supported from the inside by the coil support portion 12j. Further, since the inner peripheral surface of the winding portion 13 is isotropically supported by the coil supporting portion 12j with good balance, the winding portion 13 has the center axis of the coil 3 coincident with the center axis of the lens holding member 2. In this state, it is held by the lens holding member 2. As described above, the optical axis JD of the lens body held by the lens holding member 2 is configured to easily coincide with the respective central axes of the lens holding member 2 and the coil 3. The winding part 13 of the coil 3 may be fixed to the coil supporting part 12j with an adhesive.

Next, case 4 will be described. In the present embodiment, the case 4 is made by punching and drawing a plate made of a nonmagnetic metal such as austenitic stainless steel. Since the case 4 is made of a non-magnetic metal, the case 4 does not adversely affect the axial driving mechanism MK and the radial driving mechanism RK.

The case 4 has a box-like outer shape that defines the storage section 4s, as shown in FIG. The case 4 has a rectangular annular outer wall portion 4A and a flat upper surface portion 4B provided so as to be continuous with the upper end (the end on the + Z side) of the outer wall portion 4A. The outer wall portion 4A has a pair of first side plate portions 4A1 facing each other and a pair of second side plate portions 4A2 perpendicular to the first side plate portion 4A1 and facing each other. Further, as shown in FIG. 1, the case 4 is connected to the base member 18 to form a housing together with the base member 18.

Next, the drive magnet 5 will be described. The drive magnet 5 has a prismatic shape as shown in FIG. 4, and is housed in the magnet holder MH. Specifically, the magnets 5A to 5D are fixed to the magnet holder MH with an adhesive, and are arranged outside the coil 3 so as to face the coil 3. The magnets 5A to 5D are arranged, for example, with the N pole side facing the coil 3.

Next, the leaf spring 6 will be described. The leaf spring 6 is made of a metal plate whose main material is a copper alloy.

4, the leaf spring 6 includes an upper leaf spring 16 disposed on the + Z side of the magnet holder MH and a lower leaf spring 26 disposed on the −Z side of the magnet holder MH, as shown in FIG. Upper leaf spring 16 includes upper leaf springs 16A and 16B for first lens holding member 2A, and upper leaf springs 16C and 16D for second lens holding member 2B.

As shown in FIG. 6, the upper leaf spring 16 includes an inner portion 16i as a movable-side support fixed to the lens holding member 2, an outer portion 16e as a fixed-side support fixed to the magnet holder MH, An elastic arm portion 16g located between the inner portion 16i and the outer portion 16e is included. The outer portion 16e includes a wire fixing portion 16s. The wire fixing portion 16s is connected to the upper end of the wire 8.

When the upper leaf spring 16 is incorporated into the lens driving device 101, the inner portion 16i is placed on the pedestal portion 12d of the lens holding member 2 (see FIG. 4). Then, the inner portion 16i is fixed to the lens holding member 2 by hot or cold caulking the projecting portion 2t inserted into the through hole H1 formed in the inner portion 16i. The outer portion 16e is fixed to the upper surface (the surface on the + Z side) of the magnet holder MH. As shown in FIG. 4, the fixing of the outer portion 16e is realized by an adhesive applied to a concave portion MHt formed in the magnet holder MH. When the outer portion 16e is overlaid on the magnet holder MH, a part of the adhesive reaches the upper surface side (+ Z side) of the outer portion 16e through the through hole H2 formed in the outer portion 16e, so that it is ensured. The outer part 16e can be fixed to the magnet holder MH.

As shown in FIG. 6, the upper leaf springs 16A and 16D are line-symmetric with respect to a line L1 parallel to the Y-axis, and the upper leaf springs 16A and 16B are line-symmetric with respect to a line L2 parallel to the X-axis. Is formed. That is, each of upper leaf springs 16A to 16D has the same shape. Therefore, this configuration can reduce the number of parts. Further, the upper leaf spring 16 can support the lens holding member 2 in the air with a good balance by this configuration. Further, the upper leaf spring 16 does not adversely affect the weight balance of the movable member MB supported by the four wires 8A to 8D.

The lower leaf spring 26 includes a left portion 26L and a right portion 26R as shown in FIG. Both the left portion 26L and the right portion 26R are configured such that the inner shape is substantially circular. The lower leaf spring 26 has an inner portion 26i as a movable support portion fixed to the lens holding member 2, an outer portion 26e as a fixed support portion fixed to the magnet holder MH, and an inner portion 26i and an outer portion 26i. And an elastic arm portion 26g located between the portion 26e and the portion 26e. Specifically, the left portion 26L includes an inner portion 26Li, an outer portion 26Le, and an elastic arm portion 26Lg, and the right portion 26R includes an inner portion 26Ri, an outer portion 26Re, and an elastic arm portion 26Rg. .

A pair of pedestals 12b (see FIG. 4) provided on the image sensor side of the first lens holding member 2A and sandwiching the optical axis JD1 is bonded to the pair of pedestals 12L on the left side portion 26L of the lower leaf spring 26 with an adhesive. It is fixed to the inner part 26Li. In FIG. 4, only one of the pair of pedestals 12b is visible. Thereby, the inner portion 26Li is fixed to the first lens holding member 2A. The same applies to the bonding between the second lens holding member 2B and the right portion 26R of the lower leaf spring 26.

As shown in FIG. 4, the magnet holder MH has four square convex protrusions MHr and four round convex protrusions protruding downward (−Z direction) from the surface on the image sensor side (−Z side). MHp. In FIG. 4, one protrusion MHr and one protrusion MHp are indicated by broken lines. The protrusion MHr is fitted into a rectangular through hole H3 as an alignment hole formed in the outer portion 26e of the lower leaf spring 26. The projecting portion MHp is inserted into a through hole H4 formed in the outer portion 26e of the lower leaf spring 26. The lower leaf spring 26 is fixed to the magnet holder MH by hot or cold caulking the projecting portion MHp inserted into the through hole H4.

When the lens holding member 2 and the magnet holder MH are connected by the leaf spring 6, the leaf spring 6 moves the lens so that the lens holding member 2 can move along the optical axis JD with respect to the magnet holder MH. The holding member 2 is supported in the air.

The upper leaf spring 16 also functions as a power supply member for supplying a current to the coil 3. Specifically, as shown in FIG. 6, the connection plate portion 16AH of the upper leaf spring 16A is electrically connected to the extension portion 33A of the first coil 3A via the conductive bonding agent AD. The wire fixing portion 16As of the upper leaf spring 16A is connected to the power supply via the wire 8A and the terminal 7AT of the metal member 7A so as to be able to conduct electricity. Similarly, the connection plate portion 16BH of the upper leaf spring 16B is electrically connected to the extension portion 33B of the first coil 3A via the conductive bonding agent AD. The wire fixing portion 16Bs of the upper leaf spring 16B is connected to the power supply via the wire 8B and the terminal 7BT of the metal member 7B so as to be able to conduct electricity. The same applies to the upper leaf spring 16C and the upper leaf spring 16D. Note that the lower leaf spring 26 may be formed of a non-conductive material since no current flows.

The conductive bonding agent AD may be, for example, a solder or a conductive adhesive in which a conductive filler such as silver particles is dispersed in a synthetic resin. The conductive adhesive may be a thermosetting type or an ultraviolet setting type.

Next, the fixed side member RG will be described. The fixed member RG includes the case 4, the coil substrate 17, and the base member 18.

The base member 18 is formed by injection molding using a synthetic resin such as a liquid crystal polymer. In the present embodiment, as shown in FIG. 5, the base member 18 has a substantially rectangular outer shape, and two openings 18k are formed in the center. The coil substrate 17 is fixed to the subject-side surface (the upper surface on the + Z side) of the base member 18 with an adhesive. In the present embodiment, grooves corresponding to each of the coils 9A to 9D are formed on the upper surface of the base member 18, and the coil substrate 17 is fixed to the base member 18 by an adhesive applied in each groove.

(2) As shown in FIG. 2, the metal member 7 is embedded in the base member 18 by insert molding. As shown in FIG. 5, the metal member 7 includes terminals 7AT to 7HT, corners 7AK to 7DK, and contact portions 7EP to 7HP. Each of the terminals 7AT to 7HT is exposed on the bottom surface (the surface on the -Z side) of the base member 18. Each of the corners 7AK to 7DK is laterally exposed at the corner of the base member 18. Each of the contact portions 7EP to 7HP is exposed on the upper surface (the surface on the + Z side) of the base member 18. Specifically, each of the contact portions 7EP to 7HP is exposed at the concave portions 18EP to 18HP formed on the upper surface (the surface on the + Z side) of the base member 18 and is exposed at the lower surface (the surface on the -Z side) of the coil substrate 17. Are electrically connected to the contact portions 17EP to 17HP formed at the same time. In order to facilitate understanding, in FIG. 5, the contact portions 17EP to 17HP (actually invisible in FIG. 5) formed on the lower surface of the coil substrate 17 are shown for convenience.

In the present embodiment, the contact portion 17FP is connected to one end of the third coil, and the contact portion 17HP is connected to the other end of the third coil. The third coil includes coils 9C and 9D. The coils 9C and 9D are connected in series. Therefore, the current relating to the third drive mechanism flows from the terminal 7FT to the terminal 7HT via the contact portion 7FP, the contact portion 17FP, the coil 9C, the coil 9D, the contact portion 17HP, and the contact portion 7HP, or in the opposite direction. Flows to

接点 The contact portion 17EP is connected to one end of the fourth coil, and the contact portion 17GP is connected to the other end of the fourth coil. The fourth coil includes coils 9A and 9B. The coils 9A and 9B are connected in series. Therefore, the current relating to the fourth drive mechanism flows from the terminal 7ET to the terminal 7GT via the contact portion 7EP, the contact portion 17EP, the coil 9A, the coil 9B, the contact portion 17GP, and the contact portion 7GP, or to the opposite direction. Flows to

The wire 8 is fixed to the metal member 7 by soldering. In the present embodiment, as shown in FIG. 6, the base end of the wire 8A is fixed to the corner 7AK of the metal member 7, and the tip is fixed to the wire fixing portion 16As of the upper leaf spring 16A. The wire 8B has a base end fixed to the corner 7BK and a distal end fixed to the wire fixing portion 16Bs. The base end of the wire 8C is fixed to the corner 7CK, and the front end is fixed to the wire fixing portion 16Cs. The wire 8D has a proximal end fixed to the corner 7DK and a distal end fixed to the wire fixing portion 16Ds.

For this reason, as shown in FIG. 6, for example, the electric current relating to the first drive mechanism is transmitted from the terminal 7AT to the corner 7AK, the wire 8A, the wire fixing portion 16As of the upper leaf spring 16A, the connection plate 16AH, and the first coil 3A. It flows to the terminal 7BT via the extension portion 33A, the winding portion 13, the extension portion 33B, the connection plate portion 16BH of the upper leaf spring 16B, the wire fixing portion 16Bs, the wire 8B, and the corner portion 7BK, or in the opposite direction. Flows.

The current for the second driving mechanism is, for example, from the terminal 7CT, the corner 7CK, the wire 8C, the wire fixing portion 16Cs of the upper leaf spring 16C, the connecting plate 16CH, the extending portion 33B of the second coil 3B, and the winding portion 13. Flows through the extension portion 33A, the connection plate portion 16DH of the upper leaf spring 16D, the wire fixing portion 16Ds, the wire 8D, and the corner portion 7DK to the terminal 7DT or in the opposite direction.

Next, with reference to FIG. 7, an automatic focus adjustment function by the axial driving mechanism MK and a camera shake correction function by the radial driving mechanism RK will be described. FIG. 7 is a schematic diagram of the lens driving device 101 and includes FIGS. 7A and 7B. FIG. 7A is a top view of the lens driving device 101. FIG. FIG. 7A omits illustrations other than the lens holding member 2, the coil 3, the case 4 (excluding the upper surface portion 4B), the driving magnet 5, the coil 9, and the magnet holder MH. FIG. 7B is a cross-sectional view of the lens driving device 101 when a plane parallel to the Z axis including the alternate long and short dash line L3 in FIG. 7A is viewed from the + Y side. FIG. 7B additionally shows a part of the leaf spring 6. 7A and 7B show the N pole of the driving magnet 5 with a fine dot pattern and the S pole of the driving magnet 5 with a coarse dot pattern.

The axial driving mechanism MK includes a first driving mechanism that moves the first lens holding member 2A along a direction parallel to the optical axis JD1 (a direction parallel to the Z axis), and a direction parallel to the optical axis JD2 (Z A second drive mechanism that moves the second lens holding member 2B along a direction parallel to the axis).

The first drive mechanism includes a first coil 3A wound around the first lens holding member 2A, a magnet 5C arranged to face the first coil 3A in a direction parallel to the X axis, and a magnet 5C arranged parallel to the Y axis. It is composed of magnets 5A and 5B arranged to face the first coil 3A in the direction.

The double arrow AR1 indicates the direction of the Lorentz force acting on the first coil 3A through which current flows in the magnetic field generated by each of the magnets 5A, 5B, and 5C.

The second drive mechanism includes a second coil 3B wound around the second lens holding member 2B, a magnet 5D arranged to face the second coil 3B in a direction parallel to the X axis, and a magnet 5D parallel to the Y axis. The magnets 5A and 5B are arranged so as to face the second coil 3B in the direction.

The double arrow AR2 indicates the direction of the Lorentz force acting on the second coil 3B through which current flows in the magnetic field generated by each of the magnets 5A, 5B, and 5D.

The radial drive mechanism RK includes a third drive mechanism that moves the magnet holder MH along a first direction (a direction parallel to the X axis) perpendicular to the optical axis JD, and a first direction perpendicular to the optical axis JD. And a fourth drive mechanism for moving the magnet holder MH in a second direction (direction parallel to the Y-axis) perpendicular to.

The third drive mechanism includes coils 9C and 9D as third coils, and magnets 5C and 5D arranged so as to face the coils 9C and 9D, respectively, in a third direction (a direction parallel to the Z axis). Is done.

The double arrow AR3 indicates the direction of the Lorentz force acting on the coil 9C through which current flows and the direction of the reaction force acting on the magnet holder MH in the magnetic field generated by the magnet 5C.

The double arrow AR4 indicates the direction of the Lorentz force acting on the coil 9D through which current flows and the direction of the reaction force acting on the magnet holder MH in the magnetic field generated by the magnet 5D.

制 御 A control device (not shown) that controls the lens driving device 101 can move the magnet holder MH in the first direction by controlling the direction and magnitude of the current flowing through the coils 9C and 9D connected in series. For example, the control device cancels the camera shake by moving the magnet holder MH in the first direction by controlling the direction and magnitude of the current flowing through the coils 9C and 9D according to the output of a camera shake detection sensor or the like (not shown). .

(4) The fourth drive mechanism includes coils 9A and 9B as fourth coils, and magnets 5A and 5B arranged to face the coils 9A and 9B in the third direction.

The double-headed arrow AR5 indicates the direction of the Lorentz force acting on the coil 9A through which the current flows and the direction of the reaction force acting on the magnet holder MH in the magnetic field generated by the magnet 5A.

The double arrow AR6 indicates the direction of the Lorentz force acting on the coil 9B through which current flows and the direction of the reaction force acting on the magnet holder MH in the magnetic field generated by the magnet 5B.

The control device can move the magnet holder MH in the second direction by controlling the direction and magnitude of the current flowing through the coils 9A and 9B connected in series. For example, the control device cancels the camera shake by moving the magnet holder MH in the second direction by controlling the direction and magnitude of the current flowing through the coils 9A and 9B according to the output of the camera shake detection sensor and the like.

The magnets 5A and 5B are included in each of the first drive mechanism, the second drive mechanism, and the fourth drive mechanism. That is, the magnet 5A is shared by each of the first drive mechanism, the second drive mechanism, and the fourth drive mechanism, and the magnet 5B is shared by each of the first drive mechanism, the second drive mechanism, and the fourth drive mechanism. Is done.

As described above, the lens driving device 101 is configured such that the first lens holding member 2A and the second lens holding member 2B can move in the first direction and the second direction integrally with the magnet holder MH. That is, the first lens holding member 2A and the second lens holding member 2B are configured to move synchronously. Specifically, the magnet holder MH is moved by the third drive mechanism in the first direction with respect to the base member 18 and is moved by the fourth drive mechanism in the second direction with respect to the base member 18. It is configured to be able to. Further, the first lens holding member 2A is configured to be movable in a third direction with respect to the magnet holder MH by the first driving mechanism, and the second lens holding member 2B is moved by the second driving mechanism to the magnet holder MH. With respect to the third direction. The first lens holding member 2A and the second lens holding member 2B are configured to be able to move in the third direction with respect to the magnet holder MH independently of each other.

Further, the magnets 5A, 5B, and 5C constituting the first driving mechanism and the magnets 5A, 5B, and 5D constituting the second driving mechanism do not change their positional relationship, that is, attract or repel. It is held by the magnet holder MH so that it does not fall.

Therefore, for example, even when the camera shake correction function related to the first lens holding member 2A is executed by the third drive mechanism, the second drive mechanism is configured with respect to the magnetic fields of the magnets 5C and 5D constituting the third drive mechanism. The effect of the magnetic field of the magnets 5A and 5B does not change. The influence of the magnetic fields of the magnets 5A and 5B constituting the first drive mechanism on the magnetic fields of the magnets 5C and 5D constituting the third drive mechanism does not change. Further, even when the camera shake correction function for the first lens holding member 2A is executed by the fourth drive mechanism, the magnets constituting the second drive mechanism with respect to the magnetic fields of the magnets 5A and 5B constituting the fourth drive mechanism. The effect of the 5D magnetic field does not change. The influence of the magnetic field of the magnet 5C constituting the first drive mechanism on the magnetic field of the magnets 5A and 5B constituting the fourth drive mechanism does not change.

With this configuration, the lens driving device 101 including the two lens holding members 2 arranged side by side can improve the reliability of a lens adjustment function such as an automatic focus adjustment function or a camera shake correction function.

Next, another configuration example of the lens driving device 101 will be described with reference to FIG. FIG. 8 is a perspective view of the coil 3, the upper leaf spring 16, and the metal member 7, and corresponds to FIG. The upper leaf spring 16 shown in FIG. 8 differs from the upper leaf spring 16 shown in FIG. 6 including four upper leaf springs 16A to 16D in that it includes three upper leaf springs 16E to 16G. Further, the coil 3 shown in FIG. 8 is arranged so that the extending portions 33 are arranged in a direction parallel to the Y axis, in that the extending portions 33 are arranged in a direction parallel to the X axis. 6 is different from the coil 3 shown in FIG. The metal member 7 shown in FIG. 8 includes a metal member 7I including the terminals 7IT1 and 7IT2 and to which the wire 8E is fixed, and a metal member 7J including the terminals 7JT1 and 7JT2 and to which the wire 8F is fixed. 6 is different from the metal member 7 shown in FIG. That is, the upper leaf spring 16 shown in FIG. 8 is different from the upper leaf spring 16 shown in FIG. 6 which is supported by four wires 8A to 8D in that it is supported by six wires 8A to 8F. In the example of FIG. 8, for simplicity of description, the terminals 7BT, 7IT2, 7JT1, 7JT2, and 7CT are unconnected terminals. However, the connection destination of each terminal may be set arbitrarily.

In the configuration illustrated in FIG. 8, the current related to the first drive mechanism is, for example, extending from the terminal 7AT to the corner 7AK, the wire 8A, the wire fixing portion 16Es1, the connection plate 16EH, and the first coil 3A of the upper leaf spring 16E. It flows to the terminal 7IT1 via the part 33A, the winding part 13, the extending part 33B, the connecting plate part 16FH1, the wire fixing part 16Fs1, and the wire 8E of the upper leaf spring 16F, or flows in the opposite direction.

The electric current relating to the second drive mechanism is, for example, from the terminal 7DT, the corner 7DK, the wire 8D, the wire fixing portion 16Gs1, the connecting plate 16GH, the extending portion 33B of the second coil 3B, and the winding portion 13 from the wire 7D. Flows to the terminal 7IT1 via the extension portion 33A, the connection plate portion 16FH2 of the upper leaf spring 16F, the wire fixing portion 16Fs1, and the wire 8E, or flows in the opposite direction.

With this configuration, the lens driving device 101 including the upper leaf spring 16 illustrated in FIG. 8 includes the two lens holding members 2 arranged side by side, similarly to the lens driving device 101 including the upper leaf spring 16 illustrated in FIG. Also, the reliability of a lens adjustment function such as an automatic focus adjustment function or a camera shake correction function can be improved.

Next, another configuration example of the lens driving device 101 will be described with reference to FIG. FIG. 9 is an exploded perspective view of the movable side member MB, and corresponds to FIG. FIG. 9 includes a perspective view of the coil substrate 17 including the coil 9 at the bottom.

The movable member MB shown in FIG. 9 differs from the movable member MB shown in FIG. 4 including four magnets 5A to 5D in that it includes six magnets 5AL, 5AR, 5BL, 5BR, 5C, and 5D. Specifically, in the configuration shown in FIG. 9, the magnet 5A shown in FIG. 4 is divided into magnets 5AL and 5AR, and the magnet 5B shown in FIG. 4 is divided into magnets 5BL and 5BR. Further, the magnet holder MH shown in FIG. 9 only includes the connecting portion MHc, and is located between the first lens holding member 2A and the second lens holding member 2B as in the magnet holder MH shown in FIG. No wall portion MHw is formed. Therefore, the first coil 3A and the second coil 3B are directly opposed. Note that the connecting portion MHc may not be provided.

The coil substrate 17 shown in FIG. 9 differs from the coil substrate 17 shown in FIG. 5 including four coils 9A to 9D in that it includes six coils 9AL, 9AR, 9BL, 9BR, 9C, and 9D. Specifically, in the configuration shown in FIG. 9, the coil 9A shown in FIG. 5 is divided into coils 9AL and 9AR, and the coil 9B shown in FIG. 5 is divided into coils 9BL and 9BR.

Therefore, in the configuration shown in FIG. 9, the first drive mechanism is disposed so as to face the first coil 3A wound around the first lens holding member 2A and the first coil 3A in a direction parallel to the X axis. It is composed of a magnet 5C and two magnets 5AL and 5BL arranged to face the first coil 3A in a direction parallel to the Y axis.

The second drive mechanism includes a second coil 3B wound around the second lens holding member 2B, a magnet 5D arranged to face the second coil 3B in a direction parallel to the X axis, and a magnet 5D parallel to the Y axis. It is composed of two magnets 5AR and 5BR arranged to face the second coil 3B in the direction.

The third drive mechanism includes two coils 9C and 9D as third coils, and two magnets 5C and 5D arranged to face the two coils 9C and 9D in the third direction. .

The fourth drive mechanism is arranged so as to face the four coils 9AL, 9AR, 9BL, and 9BR as the fourth coils and the four coils 9AL, 9AR, 9BL, and 9BR in the third direction. And five magnets 5AL, 5AR, 5BL, and 5BR.

With this configuration, the lens driving device 101 including the movable member MB illustrated in FIG. 9 includes two lens holding members 2 arranged side by side, similarly to the lens driving device 101 including the movable member MB illustrated in FIG. Also, the reliability of a lens adjustment function such as an automatic focus adjustment function or a camera shake correction function can be improved.

Note that the lens driving device 101 including the movable member MB illustrated in FIG. 4 is different from the lens driving device 101 including the movable member MB illustrated in FIG. Since the number of coils constituting the (coil 9) is small, a simpler configuration can be realized.

As described above, the lens driving device 101 according to the embodiment of the present invention includes, as shown in FIG. 4, for example, a first lens holding member 2A capable of holding a first lens body and provided with a first coil 3A. A second lens holding member 2B, which is arranged side by side with the first lens holding member 2A, can hold the second lens body, and is provided with the second coil 3B, in the optical axis direction (the direction of the optical axis JD1 or Magnets (the -X side portion of the magnet 5A, the -X side portion of the magnet 5B, and the magnet 5C) facing the first coil 3A in a direction intersecting with the optical axis JD1 and the optical axis direction (light A driving magnet including magnets (+ X side portion of magnet 5A, + X side portion of magnet 5B, and magnet 5D) facing second coil 3B in a direction intersecting with axis JD2 or a direction parallel to optical axis JD2. 5 and the driving magnet 5 And a first support portion (the -X side portion of the upper leaf springs 16A and 16B and the lower leaf spring 26) for supporting the first lens holding member 2A movably in the optical axis direction with respect to the magnet holder MH. And a second support portion (+ X side portions of the upper leaf springs 16C and 16D and the lower leaf spring 26) for supporting the second lens holding member 2B movably in the optical axis direction with respect to the magnet holder MH. A magnet holder MH is provided for one fixed body (leaf spring 6), a fixed side member RG provided with a fixed side coil (coil 9) facing the drive magnet 5 in the optical axis direction, and a fixed side member RG. A second support (wire 8) that is movably supported in a direction intersecting the optical axis direction. The magnets 5A to 5D constituting the driving magnet 5 are arranged so as to surround the first lens holding member 2A and the second lens holding member 2B. Typically, all of the magnets 5A to 5D are arranged along an annular region surrounding both the first lens holding member 2A and the second lens holding member 2B. In the example of FIG. 4 or 9, the magnet holder MH is arranged along the outer frame of the magnet holder MH surrounding both the first lens holding member 2A and the second lens holding member 2B. Further, at least two magnets constituting the driving magnet 5 are opposed to each other with the first lens holding member 2A interposed therebetween. In the example of FIG. 4, the magnets 5A and 5B constituting the driving magnet 5 are opposed to each other with the first lens holding member 2A interposed therebetween. Further, the magnets 5A and 5B constituting the driving magnet 5 are opposed to each other with the second lens holding member 2B interposed therebetween. In the example of FIG. 9, the magnets 5AL and 5BL that constitute the driving magnet 5 are opposed to each other with the first lens holding member 2A interposed therebetween. The magnets 5AR and 5BR that constitute the driving magnet 5 are opposed to each other with the second lens holding member 2B interposed therebetween.

With this configuration, the lens driving device 101 can improve the reliability of the lens adjustment function with the configuration including the two lens holding members 2 arranged side by side.

First, each of the magnets 5A to 5D constituting the driving magnet 5 is fixed to the magnet holder MH so as not to move relative to each other. Specifically, even when the camera shake correction function for the first lens holding member 2A is executed by at least one of the third driving mechanism and the fourth driving mechanism, the vibration against the magnetic field of the magnet surrounding the first lens holding member 2A is reduced. This is because the effect of the magnetic field of the magnet surrounding the second lens holding member 2B does not change. That is, the degree of interference between the magnetic fields of the magnets 5A to 5D does not change even if a lens adjustment function such as an automatic focus adjustment function or a camera shake correction function is executed. The camera shake acts on the first lens holding member 2A and the second lens holding member 2B in the same manner.

Second, the magnet is not arranged between the first lens holding member 2A and the second lens holding member 2B. That is, the distance between the first lens holding member 2A and the second lens holding member 2B can be reduced, the structure of the movable member MB can be simplified, and the weight can be reduced. This configuration is achieved by realizing a configuration in which the degree of interference of the magnetic field does not change when the lens adjustment function is executed. This is because it is not necessary to take measures such as increasing the distance between the first lens holding member 2A and the second lens holding member 2B in order to avoid a change in the degree of magnetic field interference. As described above, since the first lens holding member 2A and the second lens holding member 2B can be arranged close to each other, the size of the lens driving device 101 can be reduced. As a result, the lens driving device 101 can be applied to a dual camera with a camera shake correction function.

The drive magnet 5 desirably sandwiches the first lens holding member 2A and the second lens holding member 2B in a direction in which the first lens holding member 2A and the second lens holding member 2B are arranged (a direction parallel to the X axis). Are configured to include magnets facing each other.

Specifically, as shown in FIG. 4, the drive magnet 5 moves the first lens holding members 2A and 2A in a direction parallel to the X axis (a direction in which the first lens holding member 2A and the second lens holding member 2B are arranged). It is configured to include a pair of magnets (magnet 5C and magnet 5D) facing each other across the second lens holding member 2B.

Then, as shown in FIG. 4, the driving magnet 5 holds the first lens holding member in a direction parallel to the Y axis (a direction orthogonal to the direction in which the first lens holding member 2A and the second lens holding member 2B are arranged). A pair of magnets (the -X side portion of the magnet 5A and the -X side portion of the magnet 5B) facing each other across the member 2A, and a pair of magnets facing the second lens holding member 2B in a direction parallel to the Y axis. (The + X side portion of the magnet 5A and the + X side portion of the magnet 5B).

Alternatively, as shown in FIG. 9, the driving magnet 5 includes a pair of magnets (magnets 5AL and 5BL) opposed to each other across the first lens holding member 2A in a direction parallel to the Y axis and a direction parallel to the Y axis. May be configured to include a pair of magnets (magnet 5AR and magnet 5BR) opposed to each other with the second lens holding member 2B interposed therebetween.

With this configuration, the lens driving device 101 can improve the reliability of the lens adjustment function with the configuration including the two lens holding members 2 arranged side by side. The lens driving device 101 has magnets on the + Y side, -X side, and -Y side of the first lens holding member 2A, for example, even when the automatic focus adjustment function for the first lens holding member 2A is executed. This is because the arrangement allows the balance of the first lens holding member 2A to be maintained. On the other hand, when the magnets are arranged only on the + Y side and the −X side of the first lens holding member 2A, the lens driving device 101 performs the operation when the automatic focus adjustment function for the first lens holding member 2A is executed. This is because the balance of the first lens holding member 2A cannot be maintained.

Desirably, of the magnets (eg, magnets 5A to 5D in FIG. 4) constituting driving magnet 5, magnets facing the first coil 3A (the -X side portion of magnet 5A and the -X side portion of magnet 5B). , And the magnet 5C) and the second coil 3B of the magnet (+ X side portion of the magnet 5A, the + X side portion of the magnet 5B, and the magnet 5D) facing the second coil 3B. And the surface opposite to are magnetized to the same magnetic pole. Specifically, all of the magnets 5A to 5D surrounding both the first lens holding member 2A and the second lens holding member 2B may be arranged such that the N pole faces inward. Alternatively, all of the magnets 5A to 5D surrounding both the first lens holding member 2A and the second lens holding member 2B may be arranged such that the S pole faces inward.

With this configuration, the lens driving device 101 can prevent the magnets that constitute the driving magnet 5 from being fixed in the opposite direction, and can improve the assemblability.

Desirably, at least one ( magnets 5A and 5B) of the magnets (eg, magnets 5A to 5D in FIG. 4) constituting the driving magnet 5 includes a portion facing the first coil 3A and a second coil 3A. 3B, and a portion facing 3B. For example, the drive magnet 5 includes two shared magnets ( magnets 5A and 5B) arranged to face each other across the first lens holding member 2A. In this case, the drive magnet 5 includes two shared magnets ( magnets 5A and 5B) arranged to face each other across the second lens holding member 2B. The common magnet is desirably longer than the other magnets forming the driving magnet 5. In the example of FIG. 4, the magnets 5A and 5B serving as the shared magnets are longer than the magnets 5C and 5D that are the other magnets constituting the driving magnet 5. The first lens holding member 2A and the second lens holding member 2B are desirably arranged on the same side as viewed from the common magnet. That is, the common magnet desirably extends along the longitudinal direction of the housing, and is arranged to face each of the first lens holding member 2A and the second lens holding member 2B. For example, as shown in FIG. 4, both the first lens holding member 2A and the second lens holding member 2B are arranged on the + Y side of the magnet 5A serving as a common magnet, and the -Y of the magnet 5B serving as a common magnet. Located on the side. With this configuration, in the lens driving device 101, the number of components can be reduced. Specifically, the number of magnets constituting the driving magnet 5 and the number of coils constituting the fixed side coil (coil 9) are reduced.

The first support preferably includes at least three leaf springs formed of a conductive material. In the example of FIG. 6, the first support includes four upper leaf springs 16A to 16D. In the example of FIG. 8, the first support includes three upper leaf springs 16E to 16G.

The second support is preferably a suspension wire formed of a conductive material and connected to the leaf spring 6 so as to be able to conduct electricity. In the example of FIG. 6, the second support members are wires 8A to 8D that are electrically connected to the upper leaf springs 16A to 16D. In the example of FIG. 8, the second support members are wires 8A to 8F that are electrically connected to the upper leaf springs 16E to 16G.

One of the at least three leaf springs 6 is desirably connected to each of the first coil 3A and the second coil 3B so as to be able to conduct electricity. In the example of FIG. 8, an upper leaf spring 16F, which is one of the three upper leaf springs 16E to 16G, is electrically connected to each of the first coil 3A and the second coil 3B.

Specifically, the upper leaf spring 16 shown in FIG. 6 is divided into four upper leaf springs 16A to 16D. One end of the first coil 3A is electrically connected to the upper leaf spring 16A, and the other end of the first coil 3A is electrically connected to the upper leaf spring 16B. The power supply is connected to the upper leaf spring 16A via the metal member 7A and the wire 8A so as to be able to conduct electricity, and is connected to the upper leaf spring 16B via the metal member 7B and the wire 8B so as to be able to conduct electricity. Similarly, one end of the second coil 3B is electrically connected to the upper leaf spring 16C, and the other end of the second coil 3B is electrically connected to the upper leaf spring 16D. The power source is connected to the upper leaf spring 16C via the metal member 7C and the wire 8C so as to be able to conduct electricity, and is connected to the upper leaf spring 16D via the metal member 7D and the wire 8D so as to be able to conduct electricity. With this configuration, the power supply can supply a current to the coil 3 via the upper leaf spring 16 as the first support and the wire 8 as the second support.

The upper leaf spring 16 shown in FIG. 8 is divided into three upper leaf springs 16E to 16G. One end of the first coil 3A is electrically connected to the upper leaf spring 16E, and the other end of the first coil 3A is electrically connected to the upper leaf spring 16F. The power source is connected to the upper leaf spring 16E via the metal member 7A and the wire 8A, or via the metal member 7B and the wire 8B so as to be able to conduct electricity, and via the metal member 7I and the wire 8E, or , Is electrically connected to the upper leaf spring 16F via a metal member 7J and a wire 8F. Similarly, one end of the second coil 3B is electrically connected to the upper leaf spring 16G, and the other end of the second coil 3B is electrically connected to the upper leaf spring 16F. The power source is connected to the upper leaf spring 16G through the metal member 7C and the wire 8C or through the metal member 7D and the wire 8D so as to be able to conduct electricity. With this configuration, the power supply can supply current to the coil 3 via the upper leaf spring 16 as the first support and the wire 8 as the second support.

Further, by dividing the upper leaf spring 16 into three or more, the yield of the metal plate, which is the material of the upper leaf spring 16, can be improved. For example, it is because material is punched efficiently.

An upper leaf spring 16F which is one of the upper leaf springs 16E to 16G shown in FIG. 8 includes an inner portion 16Fi1 as a portion fixed to the first lens holding member 2A, and a portion fixed to the second lens holding member 2B. And an inner portion 16Fi2 as the The upper leaf spring 16F has outer portions 16Fe1 and 16Fe2 fixed to the magnet holder MH. With this configuration, the power supply can use the upper leaf spring 16F as a path for flowing a current to each of the first coil 3A and the second coil 3B. This configuration can increase the layout flexibility of the upper leaf spring 16. The improvement in the flexibility of the layout of the upper leaf springs 16 has an effect that, for example, a layout that prevents the upper leaf springs 16 from contacting each other to cause a short circuit is easily realized.

For example, as shown in FIG. 5, the fixed-side coils include coils 9C and 9D as third coils capable of moving the magnet holder MH in a first direction (direction parallel to the X axis) perpendicular to the optical axis JD, and And coils 9A and 9B as fourth coils capable of moving the magnet holder MH in a second direction (direction parallel to the Y axis) perpendicular to the axis JD and perpendicular to the first direction. With such a configuration, the number of coils constituting the fourth coil is reduced. However, at least one of the coil 9A and the coil 9B may be divided into two parts, a + X side part and a -X side part.

Note that the camera module according to the embodiment of the present invention includes a lens driving device as described above, a first lens body, a second lens body, a first imaging element facing the first lens body, and a second lens. A second imaging device facing the body.

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

For example, in the above-described embodiment, the wire 8 is fixed to the metal member 7 embedded in the base member 18 by soldering, but may be fixed to the coil substrate 17 by soldering or a conductive adhesive. Alternatively, it may be fixed to the base member 18 by soldering or a conductive adhesive.

In the above embodiment, the magnets 5A to 5D are magnets magnetized in two poles, but may be magnets magnetized in multiple poles, such as a magnet magnetized in four poles.

This application claims the priority based on Japanese Patent Application No. 2018-142914 filed on July 30, 2018, the entire contents of which are incorporated herein by reference.

2 ... Lens holding member # 2A ... First lens holding member # 2B ... Second lens holding member # 2t ... Projection part # 3 ... Coil # 3A ... First coil # 3B ... Second Coil # 4 Case # 4A Outer wall # 4A1 First side plate # 4A2 Second side plate # 4B Top surface # 4s Storage unit # 5 Drive magnet # 5A to 5D ..Magnet # 6 ... Leaf spring # 7, 7A-7J ... Metal member # 7AK-7DK ... Square part # 7AT-7HT, 7IT1, 7IT2, 7JT1, 7JT2 ... Terminal # 7EP-7HP ... Contact part 8, 8A to 8F: wire # 9, 9A to 9D: coil # 12: cylindrical part # 12b: pedestal part # 12d: pedestal part # 12h: eaves part # 12j: coil support part 13 ... winding part # 1 , 16A to 16G ··· Upper leaf spring 16AH to 16GH ··· Connecting plate 16e ··· Outer part 16g ··· Elastic arm 16i ··· Inner part 16s ··· Wire fixing part 17 ··· Coil substrate 17EP to 17HP ··· Contact point 18 ··· Base member 18EP to 18HP ··· Recessed portion 18k ··· Opening 26 · Lower leaf spring 26e · · · Outer portion 26g · Elastic arm portion 26i ··· Inside part 26L ··· Left side 26R ··· Right side part 33, 33A, 33B ··· Extension part 52 ··· Flange part H4: Through-holes JD, JD1, JD2: Optical axis AD: Conductive bonding agent LB: Lower member MB: Movable member MH: Stone holder MHc Connection part MHp Projection part MHr Projection part MHt Concave part MHw Wall part MK Axial drive mechanism RG Fixed member RK・ Radial drive mechanism

Claims (8)

1. A first lens holding member capable of holding a first lens body and provided with a first coil;
   A second lens holding member arranged side by side with the first lens holding member, capable of holding a second lens body, and provided with a second coil;
   A magnet opposing the first coil in a direction intersecting the optical axis direction, and a magnet opposing the second coil in a direction intersecting the optical axis direction;
   A magnet holder for holding the driving magnet,
   A first support portion for supporting the first lens holding member so as to be movable in the optical axis direction with respect to the magnet holder; and a supporting portion for supporting the second lens holding member so as to be movable in the optical axis direction with respect to the magnet holder. A first support including a second support portion,
   A fixed side member provided with a fixed side coil facing the drive magnet in the optical axis direction,
   A second support that movably supports the magnet holder in a direction intersecting the optical axis direction with respect to the fixed side member,
   A magnet constituting the driving magnet is disposed so as to surround the first lens holding member and the second lens holding member,
   At least two magnets constituting the driving magnet face each other across the first lens holding member,
   Lens drive.
2. The drive magnet includes a magnet opposed to the first lens holding member and the second lens holding member with the first lens holding member and the second lens holding member interposed therebetween in a direction in which the first lens holding member and the second lens holding member are arranged.
   The lens driving device according to claim 1.
3. Among the magnets constituting the driving magnet, a surface of the magnet facing the first coil, which faces the first coil, and a surface of the magnet facing the second coil, which faces the second coil, Magnetized on the same pole,
   The lens driving device according to claim 1.
4. At least one of the magnets constituting the driving magnet is a shared magnet having a portion facing the first coil and a portion facing the second coil.
   The lens driving device according to claim 1.
5. The drive magnet includes two common magnets arranged to face each other across the first lens holding member,
   The lens driving device according to claim 4.
6. The shared magnet is longer than the other magnets constituting the driving magnet,
   The lens driving device according to claim 4.
7. The first support includes at least three leaf springs formed of a conductive material,
   The second support is a suspension wire formed of a conductive material and electrically connected to the leaf spring,
   One of the at least three leaf springs is electrically connected to each of the first coil and the second coil.
   The lens driving device according to claim 1.
8. A lens driving device according to claim 1,
   Said first lens body;
   Said second lens body;
   A first imaging element facing the first lens body,
   A second imaging element facing the second lens body.
   The camera module.

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