WO2018020723A1

WO2018020723A1 - Lens-driving apparatus

Info

Publication number: WO2018020723A1
Application number: PCT/JP2017/008237
Authority: WO
Inventors: 英幸五明; 石黒　克之; 彰良猿舘
Original assignee: アルプス電気株式会社
Priority date: 2016-07-29
Filing date: 2017-03-02
Publication date: 2018-02-01
Also published as: JP2019164174A

Abstract

[Problem] To provide a lens-driving apparatus in which the thrust for movement in the optical axis direction is stabilized. [Solution] A lens-driving apparatus characterized by comprising: a lens-holding member capable of holding a lens; a first coil 13 fixed to the periphery of the lens holding member; a permanent magnet EM provided at the outside of the first coil 13 so as to face the first coil 13; a biasing member for supporting the lens-holding member so as to be movable in the optical axis direction; and a fixing member R6 to which the permanent magnet EM is fixed. The fixing member R6 has: a positioning part 76 capable of abutting the inner surface EMp of the permanent magnet EM which faces the first coil 13 side; and a facing wall section 46 facing the outer surface EMq of the permanent magnet EM which is on the reverse side from the inner surface EMp. The permanent magnet EM is fixed by the fixing member R6 in a state of being positioned by the positioning part 76.

Description

Lens drive device

The present invention relates to a lens driving device that is mounted on a portable device with a camera, for example, and can move a lens in the optical axis direction, and more particularly to a lens driving device that can also be moved in a direction crossing the optical axis direction.

In recent years, it has become common for small cameras to be mounted on portable devices typified by cellular phones. The lens drive device, which is the main part of the camera mechanism mounted on this small portable device, is used for autofocus for taking still images or moving images. It was necessary to move the lens barrel). As a lens driving device that satisfies this requirement, a lens driving device provided with a magnetic circuit for driving a lens holder (lens holding member) for holding a lens body is well known.

Recently, in order to improve the quality of images taken with this small camera, attempts have been made to incorporate a camera shake correction mechanism used in general cameras into this small camera. This camera shake correction mechanism includes various methods such as a method of moving a lens, a method of moving an automatic focus driving device, or a method of moving an image sensor (for example, CCD: Charge Coupled Device). A lens driving device that incorporates a method of moving the lens among the above-described camera shake correction mechanisms has been proposed.

As the lens driving device described above, in Patent Document 1 (conventional example), a lens driving device 900 as shown in FIGS. 20 and 21 is proposed. FIG. 20 is an exploded perspective view of a conventional lens driving device 900. FIG. 21 is a partial longitudinal sectional view of a lens driving device 900 of a conventional example.

A lens driving device 900 shown in FIG. 20 moves an autofocus lens driving unit 920 that moves a lens barrel along an optical axis, and an autofocus lens driving unit 920 in a first direction and a second direction. And a camera shake correction unit configured to correct camera shake. In the lens driving device 900, the autofocus lens driving unit 920 and the camera shake correction unit are housed in a shield cover 942, as shown in FIG.

First, as shown in FIGS. 20 and 21, the autofocus lens driving unit 920 includes a lens holder 924 that holds a lens barrel, a focus coil 926 fixed to the lens holder 924, and a radial direction of the focus coil 926. A plurality of permanent magnets 928 arranged on the outside, a magnet holder 930 that holds the permanent magnets 928, a first leaf spring 932 and a second leaf spring 934 that support the lens holder 924 so as to be displaceable in the optical axis direction, , Including. The magnet holder 930 includes an octagonal cylindrical outer cylinder portion 930A, a rectangular upper ring-shaped end portion 930B provided at the upper end of the outer cylindrical portion 930A, and an octagonal shape provided at the lower end of the outer cylindrical portion 930A. A lower ring-shaped end portion 930C.

Next, as shown in FIG. 20, the camera shake correction unit enables the autofocus lens driving unit 920 to swing with respect to the base 914 disposed at a position close to the second leaf spring 934 and the base 914. A support member (suspension wire 916) to be supported, a plurality of camera shake correction coils 918 arranged on the base 914 so as to face the plurality of permanent magnets 928, and a magnetic force of the permanent magnet 928 to detect the autofocus. And a plurality of Hall elements 950 that detect the position of the lens driving unit 920.

The autofocus lens driving unit 920 and the camera shake correction unit configured in this manner are connected by a suspension wire 916 of the camera shake correction unit. With this configuration, since the autofocus lens driving unit 920 is supported by the camera shake correction unit so as to be swingable, the autofocus lens driving unit 920 is orthogonal to the optical axis direction and is also orthogonal to each other. It is possible to move freely in the second direction.

JP 2013-24938 A

However, in the lens driving device 900 configured as described above, the four permanent magnets 928 are only arranged on the outer cylinder portion 930A of the magnet holder 930. Thus, the distance between the permanent magnet 928 and the focus coil 926 varies. For this reason, the magnetic force acting on the focus coil 926 from the permanent magnet 928 varies, and the thrust for moving the lens holder 924 in the optical axis direction also varies, and there is a problem that stable driving performance cannot be obtained. It was.

The present invention solves the above-described problems, and an object of the present invention is to provide a lens driving device with a stable thrust for moving the lens holding member in the optical axis direction.

In order to solve this problem, a lens driving device according to the present invention includes a lens holding member capable of holding a lens body, a first coil fixed around the lens holding member, and the outside of the first coil. A permanent magnet provided to face the first coil, an urging member that supports the lens holding member so as to be movable in the optical axis direction, and a fixing member to which the permanent magnet is fixed. In the lens driving device that constitutes a first driving mechanism in which one coil and the permanent magnet move the lens holding member in the optical axis direction, the fixing member is an inner surface facing the first coil side of the permanent magnet. A positioning portion capable of abutting, and an opposing wall portion facing the outer surface of the permanent magnet opposite to the inner side surface, and the permanent magnet is positioned on the fixing member in a state where the permanent magnet is positioned on the positioning portion. Fixed It is characterized in Rukoto.

According to this, in the lens driving device of the present invention, even if the thickness of the permanent magnet varies, the variation in the distance between the inner surface of the permanent magnet and the first coil is suppressed, and the permanent magnet is accurately arranged. The For this reason, the magnetic force acting on the first coil from the permanent magnet is stabilized, and the thrust for moving the lens holding member in the optical axis direction is also stabilized.

In the lens driving device of the present invention, the permanent magnet has a plate shape, the fixing member is formed in a frame shape, and both end sides in the longitudinal direction intersecting the optical axis direction of the permanent magnet. Are provided with extending portions that extend along the optical axis direction, and each of the extending portions is provided with the positioning portion that faces the inner surface of the permanent magnet. It is characterized by that.

According to this, it will be positioned by the inner surface of the both ends side of the longitudinal direction of a permanent magnet. Thereby, the positional deviation of the permanent magnet is suppressed, and it is easy to ensure the positioning accuracy between the permanent magnet and the first coil.

Further, in the lens driving device according to the present invention, an accommodation space in which at least a part of the permanent magnet can be disposed is formed by the positioning portion and the opposing wall portion, and the extending portion is adjacent to the opposing wall portion. The first gap is provided between the outer surface of the permanent magnet and the opposing wall portion, and an adhesive is provided at least in the first gap.

According to this, the permanent magnet and the fixing member can be bonded to each other at a wide area between the outer surface and the opposing wall. For this reason, the permanent magnet can be fixed to the fixing member with strong strength, and even if a strong impact such as dropping is applied, the permanent magnet can be prevented from falling off the fixing member.

Further, the lens driving device of the present invention is characterized in that the opposing wall portion is provided continuously between the adjacent extending portions and has a notch in a central portion.

According to this, the strength of the fixing member for fixing the permanent magnet can be increased. For this reason, since a deformation | transformation of a fixing member can be suppressed, a permanent magnet can be arrange | positioned more accurately. Further, by using this notch, the adhesive can be easily applied, or the adhesive can be cured by irradiating the adhesive with ultraviolet rays from the outside. By these things, a lens drive device can be assembled easily.

The lens driving device of the present invention is characterized in that a length dimension of the positioning portion in the optical axis direction is larger than a length dimension of the opposing wall portion in the optical axis direction.

According to this, the opposing wall portion can be made small and thin without affecting the positioning accuracy of the permanent magnet. For this reason, the external shape of a fixing member can be made small, and a lens drive device can be reduced in size.

In the lens driving device according to the present invention, the movable unit includes at least the lens holding member and the first drive mechanism, and the second drive moves the movable unit in a direction intersecting the optical axis direction. Provided with a mechanism, wherein the fixing member has a frame-like portion for projecting the extending portion downward, and the second drive mechanism is at least the permanent magnet and a second disposed below the permanent magnet. A coil, and
The extending portion has a lower end surface at the same height as the lower surface of the permanent magnet in the optical axis direction, and a second gap between the upper surface of the permanent magnet and the frame-shaped portion of the fixing member. It is characterized by having.

According to this, even if the dimension of the permanent magnet in the optical axis direction (height direction) varies, the permanent magnet can be accurately arranged on the basis of the lower end surface of the extending portion and the lower surface of the permanent magnet. . In addition, variations in the size of the permanent magnet can be absorbed by the second gap. For this reason, the dispersion | variation in the distance of the lower surface of a permanent magnet and a 2nd coil is suppressed, and the magnetic force which acts on the 2nd coil from a permanent magnet will be stabilized. As a result, variation in thrust in the intersecting direction intersecting the optical axis direction can be suppressed, and the movable unit can be driven stably.

In the lens driving device of the present invention, even if the thickness of the permanent magnet varies, the variation in the distance between the inner surface of the permanent magnet and the first coil is suppressed, and the permanent magnet is arranged with high accuracy. For this reason, the magnetic force acting on the first coil from the permanent magnet is stabilized, and the thrust for moving the lens holding member in the optical axis direction is also stabilized.

It is a disassembled perspective view explaining the lens drive device of 1st Embodiment of this invention. It is a top perspective view explaining the lens drive device of a 1st embodiment of the present invention. FIGS. 3A and 3B are diagrams illustrating the lens driving device according to the first embodiment of the present invention, in which FIG. 3A is a top view when FIG. 2 is viewed from the Z1 side, and FIG. It is the front view seen from the side. 4A and 4B are diagrams illustrating the lens driving device according to the first embodiment of the present invention, in which FIG. 4A is a bottom view in which the base member is omitted when FIG. 2 is viewed from the Z2 side, and FIG. FIG. 5 is a bottom view in which the multilayer substrate shown in FIG. 5A and 5B are diagrams illustrating the lens driving device according to the first embodiment of the present invention, in which FIG. 5A is an upper perspective view in which the case member illustrated in FIG. 2 is omitted, and FIG. It is the front view which looked at (a) from the Y2 side. FIGS. 6A and 6B are diagrams illustrating a lens holding member of the lens driving device according to the first embodiment of the present invention, in which FIG. 6A is an upper perspective view of the lens holding member, and FIG. It is an upper perspective view in which the urging member and the first coil are mounted on the member. FIGS. 7A and 7B are diagrams illustrating a lens holding member of the lens driving device according to the first embodiment of the present invention, in which FIG. 7A is a lower perspective view of the lens holding member, and FIG. It is a lower perspective view in which the urging member and the first coil are mounted on the member. FIGS. 8A and 8B are diagrams illustrating a biasing member of the lens driving device according to the first embodiment of the present invention, in which FIG. 8A is a top view of an upper leaf spring of the biasing member, and FIG. It is a bottom view of the lower leaf | plate spring of a biasing member. FIG. 9A is a diagram illustrating an urging member of the lens driving device according to the first embodiment of the present invention, and FIG. 9A is an upper perspective view in which a suspension wire and a fixing member are mounted on the urging member; FIG.9 (b) is the downward perspective view which looked at Fig.9 (a) from the downward direction. FIG. 10A is a diagram illustrating an urging member of the lens driving device according to the first embodiment of the present invention, and FIG. 10A is an enlarged top view of a portion P shown in FIG. FIG. 9B is an enlarged top perspective view of a Q portion shown in FIG. It is a figure explaining the 1st drive mechanism of the lens drive device concerning 1st Embodiment of this invention, Comprising: Fig.11 (a) is the bottom face which abbreviate | omitted the lens holding member and urging | biasing member shown in FIG.4 (b). FIG. 11 (b) is a bottom view showing only the permanent magnet and the fixing member shown in FIG. 11 (a). FIGS. 12A and 12B are diagrams illustrating a first driving mechanism of the lens driving device according to the first embodiment of the present invention, in which FIG. 12A is a lower perspective view of a fixing member, and FIG. It is a downward perspective view in which a permanent magnet was attached to. It is a figure explaining the 1st drive mechanism of the lens drive device concerning 1st Embodiment of this invention, Comprising: It is an enlarged bottom view of the R section shown in FIG.11 (b). FIG. 14A is a diagram illustrating a base member of the lens driving device according to the first embodiment of the present invention, and FIG. 14A is an upper perspective view in which a suspension wire is attached to the base member, and FIG. FIG. 15 is a lower perspective view of FIG. 14A viewed from below. FIG. 15A is a diagram illustrating a base member of the lens driving device according to the first embodiment of the present invention, and FIG. 15A is an enlarged upper perspective view of an S portion shown in FIG. FIG. 14B is an enlarged lower perspective view of a T portion shown in FIG. It is a figure explaining the base member of the lens drive device concerning a 1st embodiment of the present invention, and Drawing 16 (a) is an upper perspective view showing a magnetic detection member and adhesives in Drawing 14 (a). FIG. 16B is an upper perspective view in which the multilayer substrate is disposed in FIG. It is a figure explaining the 2nd drive mechanism of the lens drive device concerning a 1st embodiment of the present invention, and Drawing 17 (a) is an upper perspective view which arranged a permanent magnet in Drawing 16 (b), FIG. 17B is a rear view of FIG. 17A viewed from the Y1 side. It is a figure explaining the manufacturing method of the lens drive device concerning a 1st embodiment of the present invention, and is an explanatory view showing each manufacturing process. It is a figure explaining the modification of the lens drive device concerning 1st Embodiment of this invention, Comprising: Fig.19 (a) is an enlarged top view which shows the modification 3 of an upper leaf | plate spring, FIG.19 (b) These are the enlarged top views which show the modification 4 of an upper leaf | plate spring, FIG.19 (c) is an expansion downward perspective view which shows the modifications 6 thru | or the modification 8 of a base member. It is a disassembled perspective view of the lens drive device of a prior art example. It is a partial longitudinal cross-sectional view of the lens drive device of a prior art example.

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

[First Embodiment]
FIG. 1 is an exploded perspective view illustrating the lens driving device 100 according to the first embodiment of the present invention. FIG. 2 is an upper perspective view for explaining the lens driving device 100. 3A and 3B are diagrams illustrating the lens driving device 100. FIG. 3A is a top view of FIG. 2 viewed from the Z1 side, and FIG. 3B is a view of FIG. 2 viewed from the Y2 side. FIG. 4A is a bottom view of the lens driving device 100 shown in FIG. 2 as viewed from the Z2 side, with the base member 7 shown in FIG. 1 omitted, and FIG. 4B is shown in FIG. 4A. It is the bottom view which omitted the multilayer substrate 98. FIG. 5A is a perspective view in which the case member H9 of the lens driving device 100 shown in FIG. 2 is omitted, and FIG. 5B is a front view of FIG. 5A viewed from the Y2 side.

The lens driving device 100 according to the first embodiment of the present invention has a rectangular parallelepiped shape as shown in FIGS. 2 and 3 and can hold a lens body (not shown) as shown in FIG. The movable unit KU including the first drive mechanism D1 that moves the holding member 2 in the optical axis direction KD (Z direction shown in FIG. 1), and the movable unit KU moves in the direction intersecting the optical axis direction KD (crossing direction CD). A suspension wire 5 that can be supported, a base member 7 disposed below the movable unit KU, and a second drive mechanism D2 that moves the movable unit KU in a direction intersecting the optical axis direction KD (cross direction CD). And detecting means M8 for detecting the position of the movable unit KU in the crossing direction CD (direction crossing the optical axis direction KD).

In addition, in the first embodiment of the present invention, as shown in FIGS. 1 to 4, the lens driving device 100 includes a case member H9 that houses the movable unit KU and the suspension wire 5 shown in FIG. As shown in FIG. 5, the frame body W9 is disposed above the lens holding member 2 (Z1 direction shown in FIG. 5). The crossing direction CD (direction crossing the optical axis direction KD) shown in FIGS. 1 and 2 shows an example for easy understanding.

Further, the first drive mechanism D1 of the movable unit KU includes an annular first coil 13 wound around the lens holding member 2 and fixed as shown in FIGS. The first coil 13 includes four permanent magnets EM (driving magnets) that are provided to face and separate from each other and a fixing member R6 to which the four permanent magnets EM are fixed. . Then, the first drive mechanism D1 uses the electromagnetic force generated when a current flows from the power source to the first coil 13 and the magnetic field generated from the permanent magnet EM to move the lens holding member 2 along the optical axis direction KD. It is to be moved.

Further, as shown in FIGS. 1 and 5, the second drive mechanism D2 is disposed at the four permanent magnets EM (drive magnets) described above and below the permanent magnets EM (Z2 direction shown in FIG. 5). And a second coil 23. Then, the second drive mechanism D2 uses the electromagnetic force generated when a current flows from the power source to the second coil 23 and the magnetic field generated from the permanent magnet EM to move the movable unit KU in the cross direction CD (optical axis direction KD). In the direction that intersects with). In the first embodiment of the present invention, the drive magnet of the first drive mechanism D1 and the drive magnet of the second drive mechanism D2 are preferably shared by the four permanent magnets EM. At that time, the first coil 13 of the first drive mechanism D1 is disposed opposite to the side (outside) of the permanent magnet EM, and the second coil 23 of the second drive mechanism D2 is disposed below the permanent magnet EM. It arrange | positions facing and prevents both coils from interfering.

As shown in FIG. 1, the detection means M8 includes a permanent magnet EM, a magnetic detection member 88 having a magnetic detection element for detecting a magnetic field generated by the permanent magnet EM (detection magnet), and a magnetic detection member. And a multilayer substrate 98 on which 88 is mounted. The detecting means M8 detects a change in the magnetic field of the permanent magnet EM that is arranged on the movable unit KU side and moves with the swing of the movable unit KU, and intersects the optical axis direction KD of the movable unit KU (crossing). The position in the direction CD) is detected. In the first embodiment of the present invention, two permanent magnets EM are preferably used in common as the detection magnet.

The lens driving device 100 configured as described above is mounted on a mounting substrate (not shown) on which an imaging element is mounted by holding a lens body (not shown) on the lens holding member 2 with an adhesive or the like. The lens driving device 100 moves the lens held by the lens body along the optical axis direction KD (Z direction shown in FIG. 2) and adjusts the focal length with respect to the image sensor. It is possible to correct for the swing of KU. Thereby, it is possible to provide the lens driving device 100 having two functions of an autofocus function and a camera shake correction function.

Next, each component will be described in detail.

First, the movable unit KU of the lens driving device 100 will be described. 6A and 6B are diagrams illustrating the lens holding member 2 of the movable unit KU. FIG. 6A is an upper perspective view of the lens holding member 2, and FIG. FIG. 6 is an upper perspective view in which the urging member 4 and the first coil 13 of the first drive mechanism D1 are mounted. 7A is a lower perspective view of the lens holding member 2, and FIG. 7B is a lower view in which the biasing member 4 and the first coil 13 of the first drive mechanism D1 are attached to the lens holding member 2. FIG. It is a perspective view.

As shown in FIG. 1, the movable unit KU of the lens driving device 100 includes a lens holding member 2 that can hold a lens body, a biasing member 4 that supports the lens holding member 2 so as to be movable in the optical axis direction KD, An upper spring fixing part B16 and a lower spring fixing part B26 to which a part of the urging member 4 is fixed, and a first drive mechanism D1 for moving the lens holding member 2 in the optical axis direction KD are configured. Yes. The upper spring fixing portion B16 and the lower spring fixing portion B26 are provided outside the lens holding member 2.

In the first embodiment of the present invention, as shown in FIG. 6B, the urging member 4 includes an upper leaf spring 4A in which a portion on one side is fixed to the upper portion of the lens holding member 2, and FIG. As shown in FIG. 4B, the lens holding member 2 is supported by the lower plate spring 4C, which is fixed to the lower part of the lens holding member 2. Further, the other side portion of the upper leaf spring 4A is fixed to the upper spring fixing portion B16, and the other side portion of the lower leaf spring 4C is fixed to a lower spring fixing portion B26 described later. In the first embodiment of the present invention, the upper spring fixing portion B16 and the lower spring fixing portion B26 are suitably provided integrally with a fixing member R6 described later. The upper leaf spring 4A is divided into two.

First, the lens holding member 2 of the movable unit KU is formed in a cylindrical shape as shown in FIGS. 6 and 7 using a liquid crystal polymer (LCP), which is one of synthetic resin materials, and the like. A cylindrical portion 12 having a circular inner peripheral surface and a rectangular outer peripheral surface, and a flange 22 protruding radially outward from the outer peripheral surface on the upper end side (Z1 side shown in FIG. 6) of the cylindrical portion 12; The flange portion 32 mainly protrudes radially outward from the outer peripheral surface on the lower end side (Z2 side shown in FIG. 6) of the cylindrical portion 12. As shown in FIG. 5, the lens holding member 2 is disposed below the frame body W9 (Z2 direction shown in FIG. 5) and above the base member 7 (Z1 direction shown in FIG. 5).

A lens body (not shown) can be mounted on the inner peripheral surface of the cylindrical portion 12 of the lens holding member 2, and the lens body is held on the lens holding member 2 using an adhesive or the like. Further, as shown in FIG. 6, on the upper end side of the cylindrical portion 12, four columnar protruding portions 12 t protruding upward are provided at equal positions with respect to the optical axis. When the lens driving device 100 is assembled, as shown in FIG. 6B, the four protruding portions 12t (lens holding member 2) and the upper leaf spring 4A of the biasing member 4 (described later). The first portion 14) is engaged and the convex portion 12t is heat caulked to fix the one side portion of the upper leaf spring 4A to the lens holding member 2.

Furthermore, on the upper end side of the cylindrical portion 12, as shown in FIG. 6, two prismatic binding portions 12k protruding upward are provided. Each of the coil end portions of the first coil 13 is wound around the binding portion 12k and soldered to each of the upper leaf springs 4A as shown in FIG. In FIG. 5A, the solder HD obtained by soldering two coil end portions and the upper leaf spring 4A is schematically shown by cross hatching surrounded by a one-dot chain line.

Moreover, as shown in FIG.7 (b), the outer periphery of the cylinder part 12 between the collar part 22 and the collar part 32 is a shape along the octagonal shape of an outer peripheral surface, and the 1st coil 13 is octagonal shape. (See FIG. 1).

Further, as shown in FIG. 7A, four concave portions 32r that are recessed in a concave shape are provided at equal positions with respect to the optical axis on the bottom surface on the flange portion 32 side. When the lens driving device 100 is assembled, as shown in FIG. 7B, the four recessed portions 32r (lens holding member 2) and the lower leaf spring 4C (described later) of the biasing member 4 are provided. The third portion 34) is opposed to the third portion 34), and this portion is fixed with an adhesive, so that one portion of the lower leaf spring 4C is fixed to the lens holding member 2.

Next, the biasing member 4 of the movable unit KU will be described. FIG. 8 is a diagram illustrating the urging member 4 of the movable unit KU, and FIG. 8A is a top view of the upper leaf spring 4A of the urging member 4 shown in FIG. 1 as viewed from the Z1 side. FIG. 8B is a bottom view of the lower leaf spring 4C of the biasing member 4 shown in FIG. 1 as viewed from the Z2 side. FIG. 9A is an upper perspective view in which the suspension wire 5 and the fixing member R6 are attached to the biasing member 4, and FIG. 9B is a lower perspective view of FIG. 9A viewed from below. is there. FIG. 10A is an enlarged top view of a P portion shown in FIG. 8A, and FIG. 10B is an enlarged upper perspective view of a Q portion shown in FIG. 9A. In FIG. 10B, for easy understanding, cross-hatching in which the solder HD in which the upper end portion of the suspension wire 5 and the upper leaf spring 4A (wire fixing portion 64) are soldered is surrounded by a one-dot chain line. This is shown schematically.

The urging member 4 of the movable unit KU is made of a metal plate made of a copper alloy as a main material. As shown in FIG. 5A, the urging member 4 is more than the inner peripheral surface of the cylindrical portion 12 of the lens holding member 2. An upper leaf spring 4A having a large-diameter opening and disposed between the lens holding member 2 and the frame W9, and the lens holding member 2 and the base member 7 as shown in FIG. The lower leaf spring 4C is disposed between them. Then, the lens holding member 2 and the biasing member 4 (the upper leaf spring 4A and the lower leaf spring 4C) are engaged, and the lens holding member 2 can move in the optical axis direction KD (Z direction shown in FIG. 2). Thus, the lens holding member 2 is supported.

First, as shown in FIG. 8A, the upper leaf spring 4A of the urging member 4 is composed of two separated members, and is substantially rotationally symmetric. Has a substantially rectangular shape. As shown in FIG. 5A, the upper leaf spring 4A is electrically connected to the first coil 13 by solder HD, and thus has a function as a power feeding member to the first coil 13. Yes.

Further, as shown in FIGS. 6B and 8A, the upper leaf spring 4A includes a plurality (four in the first embodiment of the present invention) of first portions 14 fixed to the lens holding member 2. 8 (a) and 9 (a), a plurality (four in the first embodiment of the present invention, which are positioned on the outer peripheral side of the first portion 14 and fixed to the upper spring fixing portion B16). 8), four elastic arm portions 54A provided between the first portion 14 and the second portion 24, and extending from the first portion 14, as shown in FIG. The connecting portion J4 that connects the first portions 14 to each other, the crosspiece portion S4 that connects the two second portions 24 to each other, and the upper end of the suspension wire 5 that is located outside the second portion 24 as shown in FIG. The four wire fixing portions 64 to be soldered to the portion, and the second portion 24 and the wire fixing portion 64 are connected. A connecting portion 74 provided on earthenware pots, a plate-like protrusion 84 that protrudes inward (the optical axis side) from wire fixing portion 64 is configured with a.

First, the four first portions 14 of the upper leaf spring 4A are provided in the first portion 14 as shown in FIG. 6B when the upper leaf spring 4A is incorporated in the lens driving device 100. The projecting portion 12t of the lens holding member 2 is inserted into the through hole, and is caulked by these four portions, so that one side of the upper leaf spring 4A is fixed to the lens holding member 2.

Similarly, as shown in FIG. 9A, the second portion 24 of the upper leaf spring 4A has two through-holes (eight in total, FIG. (See (a)), a protrusion B16t (described later) of the upper spring fixing portion B16 is inserted, and this portion is fixed with an adhesive, whereby the other side of the upper leaf spring 4A is fixed to the fixing member R6 side. Become so.

In this way, as shown in FIG. 8A, the upper leaf spring 4 </ b> A includes two members having a substantially point-symmetric shape, and the four portions of the first portion 14 with respect to the lens holding member 2. Are fixed at four equal positions of the second portion 24 with respect to the fixing member R6. Thereby, the lens holding member 2 can be supported with good balance.

Next, as shown in FIG. 8A, four wire fixing portions 64 of the upper leaf spring 4A are provided on the outside of the second portion 24 fixed to the upper spring fixing portion B16. Each of the four wire fixing portions 64 has a through portion 64k formed of a through hole. 9, the wire fixing portion 64 is soldered to the upper end portion of the suspension wire 5 as shown in FIG. 10B, with the suspension wire 5 inserted through the through portion 64k.

Next, in the first embodiment of the present invention, the connecting portion 74 of the upper leaf spring 4A is fixed to a wire from two spaced locations of the second portion 24 as shown in FIGS. 8 (a) and 10 (a). It has two extending portions 74e extending toward the portion 64 side. The two extending portions 74e have spring properties, and can move in a direction (crossing direction CD) intersecting the optical axis direction KD of the movable unit KU.

Next, as shown in FIGS. 8A and 10A, the protruding portion 84 of the upper leaf spring 4A is formed in a plate shape and a rectangular shape, and between the two extending portions 74e. It protrudes inward from the wire fixing part 64. The protruding direction of the protruding portion 84 is a direction toward the central optical axis. In other words, it is a direction along a straight line connecting the penetration part 64k of the wire fixing part 64 and the center of the optical axis. The projecting portion 84 can be irradiated with laser light.

Accordingly, the projecting portion 84 of the upper leaf spring 4A is irradiated with laser light, and heat is transmitted from the projecting portion 84 to the wire fixing portion 64, whereby the wire fixing portion 64 of the upper leaf spring 4A and the upper end portion of the suspension wire 5 are Can be soldered. This improves workability and the like as compared with the case where manual soldering is performed, and can reduce defects in the soldering process.

Further, since the projecting portion 84 is configured to project inward (optical axis side) from the wire fixing portion 64, it is possible to suppress an increase in the outer shape of the upper leaf spring 4A, and thus the outer shape of the lens driving device 100 can be reduced. can do.

Further, as shown in FIGS. 8A and 10A, the projecting portion 84 is formed with an elongated opening 84k formed adjacent to the wire fixing portion 64 side. The opening 84k is formed of a through hole (a long hole that penetrates), and is formed such that the dimension in the orthogonal direction (Wa shown in FIG. 10A) orthogonal to the protruding direction of the protruding part 84 is larger than the dimension in the protruding direction. ing. In addition, the part located inside this opening part 84k becomes the laser irradiation part which irradiates the laser beam mentioned above.

As a result, when solder paste is applied to the wire fixing portion 64 and the projecting portion 84 is irradiated with laser light for soldering, the melted solder HD is blocked by the opening portion 84k (see FIG. 10B). ), It is possible to prevent the solder HD from flowing widely to the protruding portion 84 side. For this reason, the solder amount of the wire fixing portion 64 is difficult to vary, and the soldering between the wire fixing portion 64 and the upper end portion of the suspension wire 5 can be ensured. Furthermore, since the solder HD does not flow to the portion irradiated with the laser beam (laser irradiation portion), it is possible to prevent “burn” of the surrounding synthetic resin material due to the scattering of the solder HD by the laser beam and the irregular reflection of the laser beam. Can do.

Furthermore, in the first embodiment of the present invention, as shown in FIG. 10A, the opening 84k has a width dimension of the opening 84k in the orthogonal direction (Wa shown in FIG. 10A) in the orthogonal direction. The width dimension (Wb shown in FIG. 10 (a)) between the edges of the protrusions 84 (left and right at the ends in the width direction) and the edges of the openings 84k (left and right at the ends in the orthogonal direction), respectively. ) Is set larger than.

Thereby, the solder HD melted at the wide opening 84k can be reliably dammed. For this reason, it is possible to reliably suppress the solder HD from flowing widely toward the protruding portion 84 side. The larger the width dimension (Wa) of the opening 84k, the better the solder HD damming effect, but the heat conduction effect from the protruding portion 84 to the wire fixing portion 64 decreases. The balance of Wa and Wb) is appropriately determined in consideration of these effects. In the first embodiment of the present invention, in consideration of this balance, the width dimension (Wa) of the opening 84k in the orthogonal direction is set to the width dimension of the protrusion 84 (the portion where the opening 84k is formed). It is set smaller than the dimension (Wb + Wb) of the part excluding the width dimension (Wa) of the opening 84k from (Wb + Wa + Wb).

Moreover, in 1st Embodiment of this invention, as shown to Fig.10 (a), the width | variety of the connection part between the penetration part 64k and the opening part 84k is a protrusion in the part located inside the opening part 84k. The width of the portion 84 is narrower. As a result, the outer shape (footprint) of the solder fillet formed around the suspension wire 5 is regulated by the portion where the width is narrow. For this reason, it is possible to prevent the solder fillet from spreading greatly and to reduce the variation in the solder amount of the wire fixing portion 64. Note that, as shown in FIG. 10, a portion located between the penetrating portion 64 k and the opening portion 84 k is a part of the wire fixing portion 64.

In addition, since the variation in the solder amount of the wire fixing portion 64 can be reduced, the solder adhesion region (back fillet) formed on the lower side (back side) through the through portion 64k can be made into a stable shape. . For this reason, variation in the influence of the solder HD on the suspension wire 5 is suppressed, and the “effective length (effective length)” contributing to the spring characteristics of the suspension wire 5 can be stabilized. As a result, camera shake correction characteristics can be stabilized.

Next, as shown in FIGS. 7B and 8B, the lower leaf spring 4C of the urging member 4 is fixed to the lens holding member 2 in a plurality (four locations in the first embodiment of the present invention). ) And a plurality of parts (the first part of the present invention) positioned on the outer peripheral side of the third part 34 and fixed to the lower spring fixing part B26, as shown in FIGS. 8 (b) and 9 (b). 4 portions 44 in one embodiment), and four elastic arm portions 54C provided between the third portion 34 and the fourth portion 44, as shown in FIG. 8B, respectively. A chain portion R4 that connects the four third portions 34.

The lower leaf spring 4C has a circular inner shape and a rectangular outer shape, and each is formed substantially symmetrical with respect to the optical axis. As a result, the lower leaf spring 4C supports the lens holding member 2 at four equal positions of the third portion 34, and at the four positions of the fourth portion 44 with respect to the lower spring fixing portion B26 (fixing member R6). Is supported in an even position. Thereby, the lens holding member 2 can be supported with good balance.

When the lens driving device 100 is assembled, as shown in FIG. 7B, the third portion 34 and the recessed portion 32r of the lens holding member 2 (see FIG. 7A) face each other. It is arranged and this part is fixed with an adhesive, and as shown in FIG. 9B, through holes provided in each of the four portions of the fourth part 44 (see FIG. 8B). A protrusion B26t (described later) of the lower spring fixing portion B26 is inserted, and this portion is fixed with an adhesive. Therefore, the biasing member 4 configured as described above supports the lens holding member 2 so as to be movable in the optical axis direction KD.

Next, as shown in FIG. 9A, the upper spring fixing portion B16 of the movable unit KU is, as described above, the upper side of the fixing member R6 (specifically, the upper side surface of the frame-like portion 56 described later). And the other side (second portion 24) of the upper leaf spring 4A is fixed. Similarly, as shown in FIG. 9B, the lower spring fixing portion B26 of the movable unit KU is preferably provided integrally with the lower side of the fixing member R6 as described above. The other side (4th part 44) of 4C is fixed.

Next, the first drive mechanism D1 of the movable unit KU will be described. 11 is a diagram illustrating the first drive mechanism D1, and FIG. 11A is a bottom view in which the lens holding member 2 and the urging member 4 shown in FIG. 4B are omitted. (B) is the bottom view which displayed only the permanent magnet EM and fixing member R6 which are shown to Fig.11 (a). 12A and 12B are diagrams illustrating the first drive mechanism D1, in which FIG. 12A is a lower perspective view of the fixing member R6, and FIG. 12B is a diagram in which the permanent magnet EM is attached to the fixing member R6. FIG. FIG. 13 is an enlarged bottom view of the R portion shown in FIG.

The first drive mechanism D1 of the movable unit KU has a function of moving the lens holding member 2 in the optical axis direction KD (Z direction shown in FIG. 2), and is wound and fixed around the lens holding member 2. The first coil 13 includes four permanent magnets EM provided to face the outside of the first coil 13, and a fixing member R6 to which the four permanent magnets EM are fixed.

First, the first coil 13 of the first drive mechanism D1 is made of a metal wire having an insulating coating (coating) on the outer periphery, and is wound around the outer periphery of the lens holding member 2 as shown in FIG. 7B. Is formed. At that time, the first coil 13 is disposed between the flange portion 22 and the flange portion 32 as shown in FIG. 7 (b), and four coils as shown in FIG. 11 (a). The inner surface EMp of the permanent magnet EM (the surface of the permanent magnet EM facing the first coil 13 side) is spaced away from the inner surface EMp.

Further, as shown in FIG. 11A, the first coil 13 is formed in a substantially octagonal annular shape, and includes four extending portions 13q extending facing the inner surface EMp of the permanent magnet EM, And a bent portion 13r that connects adjacent extending portions 13q. The first coil 13 has a shape in which a metal wire is wound and bundled, but is simplified in FIGS. 1, 4 (b), 7 (b), and 11 (a). The surface is shown flat.

The first coil 13 is electrically conductive at both ends of the wound metal wire, and as described above, as shown in FIG. Each of the side leaf springs 4A is soldered and electrically connected.

Next, the permanent magnet EM of the first drive mechanism D1 is formed in an elongated plate shape using, for example, four neodymium magnets as shown in FIG. 11 and FIG. It has an inner surface EMp extending in the longitudinal direction facing the side, and an outer surface EMq extending in the longitudinal direction opposite to the inner surface EMp. In addition, the permanent magnet EM is fixed to the fixing member R6 so as to surround the optical axis and each set of parallel opposing faces is arranged orthogonally. The permanent magnet EM is magnetized so as to have different magnetic poles on the inner side surface EMp and the outer side surface EMq.

Next, the fixing member R6 of the first drive mechanism D1 uses a liquid crystal polymer (LCP), which is one of synthetic resin materials, and is formed in a substantially rectangular frame shape in plan view as shown in FIG. As shown in FIG. 12 (a), an opposing wall portion 46 that forms an outer periphery facing the outer side surface EMq of the permanent magnet EM, and an upper side surface that is formed orthogonal to the opposing wall portion 46 is configured. The frame-shaped portion 56, the extending portion 66 formed at the four corners and projecting downward from the frame-shaped portion 56, and the positioning portion 76 that can come into contact with the inner side surface EMp of the permanent magnet EM are configured. Yes. As shown in FIG. 11, four permanent magnets EM are attached to the fixing member R 6, and the inner side surface EMp of the permanent magnet EM and the positioning portion 76 are disposed in contact with each other, so that the positioning member 76 is positioned. In this state, it is fixed to the fixing member R6.

Thereby, since the permanent magnet EM is fixed to the fixing member R6 in a state where the inner surface EMp of the permanent magnet EM and the positioning portion 76 of the fixing member R6 are in contact with each other, the thickness of the permanent magnet EM is reduced. Even if there is a variation, the distance between the inner surface EMp of the permanent magnet EM and the first coil 13 is suppressed, and the permanent magnet EM is arranged with high accuracy. For this reason, the magnetic force that acts on the first coil 13 from the permanent magnet EM is stabilized, and the thrust for moving the lens holding member 2 in the optical axis direction KD is also stabilized.

First, as shown in FIG. 12A, the opposing wall portion 46 of the fixing member R6 is provided continuously between adjacent extending portions 66 to form the outer periphery of the four sides of the fixing member R6. is doing. Thereby, the intensity | strength of fixing member R6 which fixes permanent magnet EM can be raised. For this reason, since deformation of the fixing member R6 can be suppressed, the permanent magnet EM can be disposed with high accuracy.

Further, each of the opposing wall portions 46 has a notch 46k at the center thereof as shown in FIG. 12 (a). Then, even after the permanent magnet EM is disposed on the fixing member R6 (see FIG. 12B), the adhesive is easily applied to the permanent magnet EM and the fixing member R6 by using the notch 46k. The adhesive can be cured by irradiating the adhesive (ultraviolet curable type) with ultraviolet rays from the outside. By these things, when producing the lens drive device 100, it can assemble easily.

In the first embodiment of the present invention, as shown in FIG. 11B, when the permanent magnet EM is disposed on the fixing member R6, the opposing wall portion 46 is formed on the outer surface EMq of the permanent magnet EM. As shown in FIG. 13, the first gap 6g is formed between the outer surface EMq and the opposing wall portion 46. The first gap 6g is provided with an adhesive to bond the permanent magnet EM and the fixing member R6. As a result, the permanent magnet EM and the fixing member R6 can be bonded to each other at a wide area between the outer surface EMq and the opposing wall portion 46. For this reason, the permanent magnet EM can be fixed to the fixing member R6 with strong strength, and even if a strong impact such as dropping is applied, the permanent magnet EM can be prevented from falling off the fixing member R6.

Next, as shown in FIGS. 1 and 12A, the frame-shaped portion 56 of the fixing member R6 is formed in a rectangular shape on a plane orthogonal to the facing wall portion 46, and constitutes the upper surface of the fixing member R6. ing. As described above, the opposing wall portion 46 is formed extending from the four sides of the frame-shaped portion 56 downward, and the extending portion 66 is formed protruding from the four corners of the frame-shaped portion 56 downward. Has been. In the first embodiment of the present invention, the opposing wall portion 46, the frame-like portion 56, and the extending portion 66 are formed continuously and integrally.

Further, as described above, the upper spring fixing portion B16 is provided on the upper surface side of the four corners of the frame-like portion 56, and as shown in FIG. 9A, the other side (second portion 24) of the upper leaf spring 4A is provided. The upper spring fixing part B16 is inserted into the protrusion B16t and fixed to the fixing member R6.

In the first embodiment of the present invention, when the permanent magnet EM is disposed on the fixing member R6, although not shown, the upper surface EMa (see FIG. 1) of the permanent magnet EM and the fixing member R6. A second gap is provided between the frame-like portion 56 and the frame-like portion 56.

Next, the extending portions 66 of the fixing member R6 are formed to protrude downward from the four corners of the frame-like portion 56, and extend along the optical axis direction KD as shown in FIG. Yes. Further, as shown in FIGS. 11 and 12A, each extending portion 66 is provided with a positioning portion 76 that is formed in parallel with the facing wall portion 46.

In the first embodiment of the present invention, the extended portion 66, the frame-like portion 56, the opposing wall portion 46, and the positioning portion 76 form an accommodation space that is surrounded on all sides (two sides are open). Yes. In the housing space, when the permanent magnet EM is disposed on the fixing member R6, a part of the permanent magnet EM, specifically, the longitudinal direction of the permanent magnet EM (direction intersecting the optical axis direction KD, FIG. 11 in both the X direction and the Y direction). And the inner side surface EMp of the both ends side of the longitudinal direction of the permanent magnet EM and the positioning part 76 contact | abut. Thereby, it will position at the two points of the inner surface EMp of the both ends side in the longitudinal direction of the permanent magnet EM, and position shift will be suppressed. This makes it easy to ensure the positioning accuracy between the permanent magnet EM and the first coil 13.

Further, as shown in FIG. 5B, the extending portion 66 is configured to have a lower end surface 66p located at the same height as the lower surface EMz of the permanent magnet EM in the optical axis direction KD. As a result, even if the dimension of the permanent magnet EM in the optical axis direction KD (height direction) varies, the permanent magnet EM is accurately arranged on the basis of the lower end surface 66p of the extending portion 66 and the lower surface EMz of the permanent magnet EM. can do. In addition, since the second gap is provided between the upper surface EMa of the permanent magnet EM and the frame-like portion 56 of the fixing member R6, the dimensional variation of the permanent magnet EM can be absorbed by the second gap.

Further, as described above, the lower spring fixing portion B26 is provided on the lower side of the extending portion 66, and as shown in FIG. 9B, the other side (fourth portion 44) of the lower leaf spring 4C It is inserted into the protrusion B26t of the spring fixing part B26 and fixed to the fixing member R6.

Next, as described above, two positioning portions 76 of the fixing member R6 are provided in each extending portion 66 as shown in FIG. Each of the positioning portions 76 of the adjacent extending portions 66 is in contact with the inner side surface EMp of one permanent magnet EM. The two positioning portions 76 are provided outside the extending direction of the extending portion 13q of the first coil 13, in other words, at a position on the bent portion 13r side of the first coil 13. For this reason, the permanent magnet EM directly faces the entire length of the extending portion 13q of the first coil 13. Thus, the thrust in the optical axis direction KD by the first drive mechanism D1 can be ensured.

12A, the length dimension of the positioning portion 76 in the optical axis direction KD is configured to be larger than the length dimension of the opposing wall portion 46 in the optical axis direction KD. Thereby, the opposing wall part 46 can be formed small and thin, without affecting the positioning accuracy of the permanent magnet EM. Thus, the outer shape of the fixing member R6 can be reduced, and the lens driving device 100 can be reduced in size. Furthermore, when the permanent magnet EM is incorporated in the fixing member R6, it is easy to mount from the outside.

Further, as shown in FIG. 13, a portion located on the inner side of the positioning portion 76 has an extending wall portion 66w that extends in parallel to face the opposing wall portion 46, and the permanent magnet EM is fixed to the fixing member R6. When it is disposed, the third gap 6s is formed between the extended wall portion 66w and the inner surface EMp of the permanent magnet EM. The third gap 6s is provided with an adhesive to bond the permanent magnet EM and the fixing member R6. Thereby, the permanent magnet EM can be fixed to the fixing member R6 with strong strength, and even if a strong impact such as dropping is applied, the permanent magnet EM can be prevented from falling off the fixing member R6.

As described above, the movable unit KU includes the lens holding member 2, the biasing member 4 (the upper leaf spring 4A and the lower leaf spring 4C), and the first driving mechanism D1 (the first coil 13, the permanent magnet EM, and the fixed member R6). ) Are arranged, and the first coil 13 corresponds to the direction in which the current flows due to the electromagnetic force generated when the current flows from the power source to the first coil 13 via the upper leaf spring 4A. The lens holding member 2 moves up and down. Moreover, in the first embodiment of the present invention, the permanent magnet EM surrounds the optical axis (the first coil 13) and is arranged on each of the four sides, so the optical axis direction KD created by the first coil 13 and the permanent magnet EM. The driving force can be applied to the lens holding member 2 in a balanced manner.

Next, the suspension wire 5 of the lens driving device 100 will be described. The suspension wire 5 is made of a metal material having conductivity and excellent elasticity, and its upper end is soldered to the upper leaf spring 4A (wire fixing portion 64), and its lower end is the base member 7 ( It is soldered to a plating part 7m) described later. The suspension wire 5 supports the movable unit KU via the upper leaf spring 4A so as to be movable in the direction intersecting the optical axis direction KD (crossing direction CD). As the metal material, for example, a copper alloy or the like is used, the cross section is a circle having a diameter of about 50 μm, and the effective length contributing to elasticity is about 3 mm.

Next, the base member 7 of the lens driving device 100 will be described. 14A and 14B are diagrams for explaining the base member 7. FIG. 14A is an upper perspective view in which the suspension wire 5 is attached to the base member 7, and FIG. 14B is a diagram in FIG. ) Is a lower perspective view seen from below. 15A is an enlarged upper perspective view of the S portion shown in FIG. 14A, and FIG. 15B is an enlarged lower perspective view of the T portion shown in FIG. 14B. 14 and 15, in order to make the explanation easy to understand, the solder HD in which the lower end portion of the suspension wire 5 and the base member 7 (plating portion 7m) are soldered is schematically shown by cross hatching surrounded by a one-dot chain line. Is shown. 16A is an upper perspective view showing the magnetic detection member 88 and an adhesive (AD shown in the drawing) on the base member 7 of FIG. 14A, and FIG. It is the upper perspective view which has arrange | positioned the multilayer substrate 98 further to a). In FIG. 16B, the magnetic detection member 88 mounted on the back surface side (lower surface) of the multilayer substrate 98 is indicated by a broken line.

The base member 7 of the lens driving device 100 is manufactured by injection molding using a liquid crystal polymer (LCP) which is one of the same synthetic resin materials as the lens holding member 2 and the fixing member R6, and is shown in FIG. Thus, the outer shape is formed in a rectangular plate shape, and is formed in an annular shape having a circular opening at the center. The base member 7 has a frame-shaped base portion 17, an adhesive placement portion 37 provided on the upper surface side of the base member 7, and a thin portion 57 positioned at a corner portion of the base member 7. Configured.

First, as shown in FIGS. 14 and 15, the base portion 17 of the base member 7 is provided with a conductive portion 7 c that is three-dimensionally wired on the upper surface, the lower surface 17 u, and the side surfaces. The conductive portion 7c is conductively connected to a second coil 23 provided on a multilayer substrate 98 described later.

Further, as shown in FIG. 14, two concave portions 7r recessed downward are provided on the upper surface side of the base member 7, and in this concave portion 7r, as shown in FIG. A magnetic detection member 88 mounted on 98 is accommodated. Accordingly, the lens driving device 100 can reduce the height corresponding to the thickness (height) of the magnetic detection member 88.

Further, as shown in FIG. 14B, a plurality of terminals T9 for connection with an external device are provided on the lower surface 17u side of the base member 7. Each of the terminals T9 is electrically connected to an electrode land of a mounting board on which an imaging element (not shown) is mounted, and can supply power and the like from the electrode land of the mounting board, and a magnetic detection member 88 (detection means M8). The signal from can also be taken out. It can also be grounded to the electrode land. Specifically, the terminal T9 is electrically connected to the first coil 13 of the first drive mechanism D1 via the conductive portion 7c, the suspension wire 5, and the upper leaf spring 4A, and the conductive portion 7c, multilayer The substrate 98 is electrically connected to the second coil 23 of the second drive mechanism D2. Further, the terminal T9 is electrically connected to the magnetic detection member 88 through the conductive portion 7c and the multilayer substrate 98.

Next, as shown in FIG. 14A, the adhesive placement portion 37 of the base member 7 is provided at four locations on the upper surface side of the base portion 17, and has a shape having an annular groove portion 37m around it. . As shown in FIG. 16A, an adhesive (AD) is applied to the adhesive placement portion 37. Then, as shown in FIG. 16B, the multilayer substrate 98 is placed on the upper surface side of the base member 7, and the multilayer substrate 98 is fixed to the base member 7 with this adhesive (AD). At that time, the adhesive placement portion 37 is at a position corresponding to each of the second coils 23 provided on the multilayer substrate 98. Thereby, the floating of the part of the 2nd coil 23 can be prevented, and the distance of the 2nd coil 23 and the permanent magnet EM can be kept appropriate. Further, since the adhesive placement portion 37 has an annular groove portion 37m around it, when the multilayer substrate 98 and the base member 7 are bonded together, excess adhesive (AD) is accommodated in the annular groove portion 37m. The Rukoto. For this reason, while being able to bond together with the thickness of a suitable adhesive agent (AD), it can make it difficult for an adhesive agent (AD) to protrude outside the multilayer substrate 98. FIG.

Next, as shown in FIGS. 14 to 16, the thin portion 57 of the base member 7 is formed with a thickness dimension (dimension in the Z direction) smaller than that of the base portion 17, and FIGS. As shown in FIG. 15B, the lower surface 57v of the thin portion 57 is positioned above the lower surface 17u of the base portion 17 (Z1 direction shown in FIG. 5B), as shown in FIG. The thin portion 57 (lower surface 57v) and the base portion 17 (lower surface 17u) are connected with a step. That is, a step is provided between the lower surface 57 v of the thin portion 57 and the lower surface 17 u of the base portion 17.

And the wall part 57w which comprises this level | step difference is provided so that the thin part 57 side may be faced. The wall portion 57w has a vertical wall formed perpendicularly (about 90 °) to the lower surface 57v of the thin portion 57. Note that the lower surface 57v of the thin portion 57 and the lower surface 17u of the base portion 17 may be partially connected by a tapered surface.

Further, as shown in FIG. 16, the thin portion 57 includes a through hole 7h through which the suspension wire 5 is inserted, and a plating portion 7m made of a metal film formed around the through hole 7h and on the inner surface of the through hole 7h. ,have. Here, the periphery of the through hole 7h includes the lower surface 57v or the upper surface portion of the thin portion 57 adjacent to the through hole 7h. The plating portion 7m around the through hole 7h only needs to be formed on at least the lower surface 57v of the thin portion 57. However, in the first embodiment of the present invention, both the lower surface 57v and the upper surface of the thin portion 57 are provided. Is provided.

Further, the same metal film as that of the plating part 7m is formed on the entire lower surface 57v of the thin part 57, and the same metal film as that of the plating part 7m is also formed on the wall part 57w. And the metal film of this lower surface 57v is following the metal film formed in the whole region of the wall part 57w.

The suspension wire 5 is inserted into the through hole 7h, and the lower end portion of the suspension wire 5 is soldered to the plating portion 7m. As a result, the suspension wire 5 is fixed to the base member 7. Therefore, the suspension wire 5 is securely fixed to the base member 7 which is more rigid than the FPC 933 which is the film base material of the conventional example. As a result, the suspension wire 5 can be stably supported, and the control of the cross direction CD that intersects the optical axis direction KD for camera shake correction can be stabilized. The base member 7 has a function as a support member that supports the lower end portion of the suspension wire 5. The thin portion 57 is referred to as a “thin portion” because the thickness of the thin portion 57 is smaller than that of the base portion 17, but is sufficient to support the suspension wire 5 whose upper end portion is soldered to the upper leaf spring 4 </ b> A. It is formed to a thickness having rigidity.

Further, when soldered by the plating portion 7m, an upper solder fillet is formed on the upper portion of the through hole 7h so as to surround the suspension wire 5, as shown in FIG. 15A, and the through hole 7h. As shown in FIG. 15B, a lower solder fillet is formed so as to surround the suspension wire 5. Although not shown in detail, the upper solder fillet is formed smaller than the lower solder fillet. Thereby, the effective length which contributes to a spring characteristic in the suspension wire 5 which supports the movable unit KU arrange | positioned above the base member 7 can be lengthened. For this reason, a spring characteristic improves and product performance can be improved.

Further, as described above, since the through hole 7h is provided in the thin portion 57 formed with a thickness dimension smaller than that of the base portion 17, the surface area of the plating portion 7m formed on the inner surface of the through hole 7h is narrowed. can do. For this reason, the amount of solder HD filled in the inner surface of the through hole 7h can be reduced, and the amount of heat applied to the solder HD during soldering can be reduced. Thereby, damage to the base member 7 can be suppressed. Further, since the solder fillet (upper solder fillet and lower solder fillet) is formed in the thin portion 57, the solder fillet can be accommodated within the thickness dimension of the base portion 17. For this reason, the whole thickness can be made thin.

Further, in the first embodiment of the present invention, the same metal film as that of the plating portion 7m is formed also on the lower surface 57v of the thin portion 57 and at least the vertical wall portion of the wall portion 57w. For this reason, when soldering the lower end portion of the suspension wire 5, for example, by irradiating with laser light, even if the flux or solder HD scatters and hits the lower surface 57v and the wall portion 57w, the lower surface 57v. And it can suppress that the synthetic resin material which comprises the base member 7 of the wall part 57w burns. Furthermore, even if the laser light hitting the solder paste or the solder HD is irregularly reflected and a part of the laser light hits the wall 57w, the synthetic resin material constituting the base member 7 of the wall 57w is prevented from being burnt. can do.

Further, since the metal film is formed on the lower surface 57v and the wall part 57w, heat can be radiated by the metal film of this part. Furthermore, by connecting the metal film from the wall part 57w to the terminal part formed on the base part 17 (in some cases up to the terminal T9), it is possible to dissipate excess heat by this part of the metal film and the terminal part. . As a result, the amount of heat applied to the thin portion 57 can be reduced, and damage to the base member 7 can be further suppressed.

In the first embodiment of the present invention, the outermost layer of the metal film is formed of gold. For this reason, it is hard to corrode, for example, is excellent in environmental resistance, and solderability is also favorable. In the metal film of the first embodiment of the present invention, a two-layer film made of nickel and copper is formed on the lower layer of gold.

Further, when soldering is performed by laser irradiation, the reflectivity of the laser beam by gold is high (about 95%), so that the laser beam hitting the solder HD is irregularly reflected, and a part thereof is a thin part. Even if it hits the lower surface 57v of the 57 or the wall 57w, it is reliably reflected. For this reason, the amount of heat given to the thin portion 57 and the wall portion 57w can be further reduced, and damage to the base member 7 can be further suppressed.

Next, the second drive mechanism D2 of the lens drive device 100 will be described. FIG. 17 is a view for explaining the second drive mechanism D2. FIG. 17 (a) is an upper perspective view in which the permanent magnet EM is disposed in FIG. 16 (b), and FIG. It is the rear view which looked at Fig.17 (a) from the Y1 side. In FIG. 17B, the magnetic detection member 88 mounted on the back side (lower surface) of the multilayer substrate 98 is indicated by a broken line.

As shown in FIG. 17, the second drive mechanism D2 of the lens driving device 100 is disposed separately from the four permanent magnets EM used in the first drive mechanism D1 and below the four permanent magnets EM. The second coil 23 is mainly configured. Then, the movable unit KU is moved in the cross direction CD (optical axis direction) by using an electromagnetic force generated when a current flows from the power source of the external device to the second coil 23 via the terminal T9 and a magnetic field generated from the permanent magnet EM. It has a function of moving in the direction crossing KD. Since the permanent magnet EM has been described above, detailed description thereof is omitted here.

As shown in FIG. 16B, the second coil 23 of the second drive mechanism D2 is provided on a multilayer substrate 98, and a spiral coil is formed by using the multilayer substrate 98 in which conductive layers are formed in multiple layers. A pattern is formed by laminating a plurality of layers. As described above, since the multilayer substrate 98 is fixed to the base member 7, the plurality of second coils 23 are supported by the base member 7. Needless to say, connections between patterns formed in each layer are made through holes. Each of the second coils 23 is electrically connected to an electrode terminal (not shown) formed on the lower surface of the multilayer substrate 98, and the electrode terminal and the conductive portion 7c of the base member 7 are soldered. Electrically connected.

Further, as shown in FIG. 16B, the second coil 23 has a shape having a longitudinal direction in a direction along each side portion of the multilayer substrate 98 having a rectangular frame shape. When the lens driving device 100 is assembled, as shown in FIG. 17A, each of the four second coils 23 is disposed to face each of the four permanent magnets EM. The longitudinal direction of the permanent magnet EM and the longitudinal direction of the second coil 23 are arranged at the same position.

Further, as shown in FIG. 16B, the longitudinal directions of the four second coils 23 are arranged at positions where the neighbors are orthogonal to each other. That is, one pair of second coils 23 facing each other across the lens holding member 2 is arranged in a direction parallel to the X direction, and the other pair of second coils 23 is arranged in a direction parallel to the Y direction. Has been. Thereby, an electric current can be sent through each pair of 2nd coils 23, and the movable unit KU can be driven to a X direction and a Y direction.

Further, as shown in FIG. 16B, the second coil 23 is provided in a pair of opposite sizes with the lens holding member 2 being the same size and point-symmetrically in plan view as seen from the optical axis direction KD. It has been. For this reason, when a current is passed through the second coil 23, a force that rotates the movable unit KU is not generated, and can be appropriately driven in a well-balanced direction (crossing direction CD) intersecting the optical axis.

Further, as described above, the permanent magnet EM is fixed to the base member 7 because the lower surface EMz of the permanent magnet EM is accurately arranged with reference to the lower end surface 66p of the fixing member R6 (extension portion 66). Variations in the distance between the second coil 23 formed on the multilayer substrate 98 and the lower surface EMz of the permanent magnet EM are suppressed. For this reason, the magnetic force which acts on the permanent magnet EM from the 2nd coil 23 will be stabilized. Thereby, variation in thrust in the cross direction CD can be suppressed, and the movable unit KU can be driven stably.

Next, the detection means M8 of the lens driving device 100 will be described. As shown in FIG. 1, the detection means M8 includes two of the four permanent magnets EM described above and a magnetic detection member 88 having a magnetic detection element for detecting a magnetic field generated by the permanent magnet EM (detection magnet). And a multilayer substrate 98 on which the magnetic detection member 88 is mounted. And the detection means M8 has a function which detects the position in the direction (crossing direction CD) which cross | intersects the optical axis direction KD of the movable unit KU. Since the permanent magnet EM has been described above, a detailed description thereof is omitted here.

First, the magnetic detecting member 88 of the detecting means M8 uses a magnetoresistive effect element whose electric resistance changes with a change in magnetic field, for example, a magnetic detecting element using a giant magnetoresistive effect (referred to as a GMR (Giant Magneto Resistive) element). Yes. In addition, the magnetic detection member 88 is formed of a package containing the magnetic detection element (magnetoresistance effect element) using a thermosetting synthetic resin material with the four terminal portions exposed to the outside.

In addition, the magnetic detection member 88 uses two magnetic detection elements, and is mounted (mounted) on the lower surface of the multilayer substrate 98 as shown in FIG. Opposite to EM. The magnetic detection member 88 detects a magnetic field generated by the permanent magnet EM disposed on the movable unit KU side and fixed to the fixed member R6, and intersects the movable unit KU in the crossing direction CD (the direction intersecting the optical axis direction KD). ) Can be detected. At this time, since the second coil 23 in the multilayer substrate 98 having the magnetic detection element mounted on the lower surface is conductively connected to the conductive portion 7c of the base member 7, a flexible printed circuit board (FPC 933) as in the conventional example is unnecessary. It becomes. Therefore, the distance between the magnetic detection element and the permanent magnet EM can be reduced, and the magnetic detection element is stably mounted on the plate-like and rigid multilayer substrate 98. As a result, the detection accuracy of the magnetic detection element can be increased, and the control in the direction intersecting the optical axis direction KD (crossing direction CD) becomes stable.

Further, as shown in FIG. 16B, the magnetic detection member 88 (magnetic detection element) is provided on an extension line in the longitudinal direction of the two adjacent second coils 23, so that the second coil 23 is provided. The magnetic detection element is hardly affected by the generated magnetic field. For example, if there is a magnetic detection element on the lower side of the second coil 23, the detection accuracy deteriorates due to the influence of the magnetic field generated by the current flowing through the second coil 23.

Next, the multilayer board 98 of the detection means M8 is formed in a rectangular frame shape using a multilayer printed wiring board (PWB, printed wiring board) so as to face each other with the central portion of the lens holding member 2 interposed therebetween. It is comprised by the two board | substrates arrange | positioned. Thereby, when the multilayer substrate 98 is manufactured from the mother substrate, it is possible to obtain a divided substrate with a high yield as compared with a case where the multilayer substrate 98 is formed of one connected substrate (ring-shaped substrate). For this reason, the number obtained from one mother substrate increases, and the manufacturing cost of the multilayer substrate 98 can be suppressed.

In addition, two magnetic detection elements are collectively mounted on one divided multilayer substrate 98. For this reason, when mounting the magnetic detection member 88 (magnetic detection element), it is only necessary to mount the magnetic detection member 88 (minimum detection substrate) on a minimum number of substrates, not on all substrates. For this reason, productivity can be improved.

The detection means M8 configured as described above can detect the position of the movable unit KU, and consequently the lens holding member 2, in the cross direction CD. And the lens drive device 100 can correct | amend the position of the lens holding member 2 by sending an electric current through the 2nd coil 23 based on the signal information from the detection means M8.

Next, the frame body W9 of the lens driving device 100 will be described. The frame W9 is a ring-shaped member that uses a synthetic resin material such as polybutylene terephthalate (PBT) and has a rectangular opening at the center and has a substantially rectangular shape as shown in FIG.

In addition, as shown in FIG. 1, two sets of through holes W9k (a total of eight) are provided at the four corners of the frame W9, and when the frame W9 is incorporated into the lens driving device 100, As shown in FIG. 5A, the protrusion B16t of the upper spring fixing part B16 is inserted. Then, by fixing this portion with an adhesive, the other side (second portion 24) of the upper leaf spring 4A sandwiched between the frame body W9 and the upper spring fixing portion B16 is fixed to the fixing member R6 side. become.

Finally, the case member H9 of the lens driving device 100 will be described. The case member H9 is manufactured by cutting, drawing or the like using a metal plate made of a non-magnetic metal material. The outer shape as shown in FIG. 1 is formed in a box shape, and FIG. Is substantially rectangular (as viewed in plan). The case member H9 accommodates these members so as to cover the movable unit KU, the suspension wire 5, the second drive mechanism D2, the detection means M8, and the frame body W9, and is fixed to the base member 7. . The case member H9 and the base member 7 are fixed with an adhesive.

Next, the operation of the lens driving device 100 configured as described above will be briefly described.

First, in the movable unit KU of the lens driving device 100, both end portions of the first coil 13 are electrically connected to the power feeding terminal T9 via the upper leaf spring 4A, the suspension wire 5 and the conductive portion 7c of the base member 7. Therefore, current can flow from the terminal T9 to the first coil 13. On the other hand, the magnetic flux from the permanent magnet EM emits the permanent magnet EM, passes through the first coil 13, and returns to the permanent magnet EM.

From this initial state, when a current is passed through the first coil 13 from the one terminal T9 side, the electromagnetic force directed from the Z1 direction, which is the optical axis direction KD, to the Z2 direction is applied to the first coil 13 according to Fleming's left-hand rule. appear. Then, the lens holding member 2 moves in the Z2 direction. On the other hand, when a current is supplied from the other terminal T9 side to the first coil 13, an electromagnetic force is generated from the Z2 direction, which is the optical axis direction KD, to the Z1 direction, and the lens holding member 2 moves in the Z1 direction. . In this way, by passing an electric current through the first coil 13, the lens driving device 100 supports a lens body (not shown) while being supported by the urging member 4 of the movable unit KU by the electromagnetic force generated in the first coil 13. The lens holding member 2 and the lens holding member 2 can be moved along the optical axis direction KD (Z direction shown in FIG. 2).

In the second driving mechanism D2 of the lens driving device 100, each of the four second coils 23 is electrically connected to the power feeding terminal T9 via the multilayer substrate 98 and the conductive portion 7c of the base member 7. Therefore, current can flow from the terminal T9 to the second coil 23. On the other hand, the magnetic flux from the permanent magnet EM emits the permanent magnet EM, passes through the second coil 23, and returns to the permanent magnet EM.

From this initial state, when a current is passed through one pair of second coils 23 that are long in the X direction, an electromagnetic force directed in the Y direction is generated in the second coil 23 that is long in the X direction. Further, when a current is passed through the other pair of second coils 23 that are long in the Y direction, an electromagnetic force directed in the X direction is generated in the second coil 23 that is long in the Y direction. The electromagnetic force generated in the second coil 23 can give a thrust in the X direction or the Y direction to the movable unit KU supported by the suspension wire 5. For this reason, it becomes possible to move the movable unit KU in a direction (crossing direction CD) crossing the optical axis direction KD.

Next, a method for manufacturing the lens driving device 100 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 18 is a diagram illustrating a method for manufacturing the lens driving device 100 and is an explanatory diagram illustrating each manufacturing process.

As shown in FIG. 18, the manufacturing method of the lens driving device 100 according to the first embodiment of the present invention includes each member (the lens holding member 2, the first coil 13, the biasing member 4 (upper leaf spring shown in FIG. 1). 4A, lower leaf spring 4C), permanent magnet EM, suspension wire 5, fixing member R6, base member 7, multilayer substrate 98 on which the second coil 23 is formed, magnetic detection member 88, frame body W9, case member H9). It comprises a preparation process PJ for preparation and an assembly process PK for assembling each member.

Further, in the preparation step PJ, as shown in FIG. 18, an urging member production step JB for producing an urging member 4 to be soldered to the upper end portion of the suspension wire 5 and a fixing member to which the permanent magnet EM is fixed. A fixing member manufacturing step JC for manufacturing R6, a base member manufacturing step JD for manufacturing the base member 7 to be soldered to the lower end portion of the suspension wire 5, and a multilayer substrate for manufacturing the multilayer substrate 98 fixed to the base member 7. And a manufacturing process JE. The other members also have the manufacturing process JA, but they do not have distinctive features, and thus detailed description thereof is omitted here.

As shown in FIG. 18, the assembly process PK mainly includes a wire insertion process (first insertion process K1) for inserting the suspension wire 5 through the penetrating portion 64k of the upper plate spring 4A, and an upper plate spring 4A. An application step (first application step K2) for applying a solder paste to the wire fixing portion 64, a laser irradiation step (first laser step K3) for soldering the wire fixing portion 64 and the suspension wire 5, and A wire insertion step (second insertion step K4) for inserting the suspension wire 5 into the through hole 7h, an application step (second application step K5) for applying a solder paste to the plating portion 7m of the base member 7, and a plating portion 7m. And a laser irradiation step (second laser step K6) for soldering the suspension wire 5. In addition, although it has the process regarding an assembly, since it does not have an outstanding feature, detailed description here is abbreviate | omitted.

First, the preparation process PJ will be described.

First, in the preparation process JA of the preparation process PJ, a liquid crystal polymer (LCP) or the like is injection-molded to manufacture the lens holding member 2 formed in a cylindrical shape. Then, a metal wire having an insulating coating (coating) on the outer periphery is wound around one binding portion 12k of the lens holding member 2 and wound around the outer peripheral surface formed between the flange portion 22 and the flange portion 32. ing. When the winding is completed, the metal wire is cut around the other binding portion 12k, and the octagonal first coil 13 is produced.

Next, in the biasing member manufacturing step JB of the preparation step PJ, a biasing member 4, that is, the upper leaf spring 4A is prepared by preparing a metal plate such as a copper alloy and performing a plurality of punching processes with a plurality of molds. And the lower leaf spring 4C.

When the upper leaf spring 4A is manufactured, as shown in FIG. 8A, the first portion 14 fixed to the lens holding member 2 and the second portion 24 fixed to the upper spring fixing portion B16. An elastic arm portion 54A provided between the first portion 14 and the second portion 24; a wire fixing portion 64 that is located outside the second portion 24 and is soldered to the upper end portion of the suspension wire 5; The shape of the mold is determined so as to have a connecting portion 74 provided so as to connect the second portion 24 and the wire fixing portion 64. Further, the connecting portion 74 has two extending portions 74e extending from the two spaced apart portions of the second portion 24 toward the wire fixing portion 64, and the wire 74 is interposed between the two extending portions 74e. The shape of the mold is also determined so that a plate-like projecting portion 84 projecting inward from the fixed portion 64 is provided.

In addition, the wire fixing portion 64 has a through portion 64k through which the suspension wire 5 can be inserted, and the protrusion 84 has a metal so that an opening 84k adjacent to the wire fixing portion 64 is formed. Determine the shape of the mold. Furthermore, the opening 84k is formed of a through hole (through hole) in which the dimension in the orthogonal direction perpendicular to the projecting direction of the projecting part 84 is larger than the dimension in the projecting direction, and the dimension of the opening 84k in the orthogonal direction. However, it becomes larger than the width dimension between the edge part of the protrusion part 84 in the orthogonal direction, and the edge part of the opening part 84k, and the width | variety of the part between the penetration part 64k and the opening part 84k is larger than the opening part 84k. The shape of the mold is determined so as to be narrower than the width of the protruding portion 84 of the portion located inside.

Similarly, when the lower leaf spring 4C is manufactured, it is fixed to the third portion 34 fixed to the lens holding member 2 and the lower spring fixing portion B26 as shown in FIG. 8B. The shape of the mold is adjusted so as to have the elastic arm portion 54C provided between the fourth portion 44, the third portion 34, and the fourth portion 44, and the linkage portion R4 connecting the respective third portions 34. Decide it. Note that the upper leaf spring 4A and the lower leaf spring 4C may be produced by etching instead of being produced by punching.

Next, in the preparation process JA of the preparation process PJ, a permanent magnet EM is manufactured by using a magnetic material such as neodymium and sintering into a long and narrow plate shape. Then, four permanent magnets EM having the same shape are prepared, and are magnetized so that the inner side surface EMp and the outer side surface EMq of the permanent magnet EM have different magnetic poles.

Next, in the preparation step JA of the preparation step PJ, a metal wire such as a copper alloy is prepared, and the suspension wire 5 having conductivity and excellent elasticity is obtained by cutting the metal wire to a desired length. I am making it.

Next, in the fixing member manufacturing step JC of the preparation step PJ, a liquid crystal polymer (LCP) or the like is injection-molded, and the fixing member R6 formed into a substantially rectangular frame shape in plan view is manufactured. And when producing fixing member R6, a desired shape can be obtained by determining the shape of the mold in advance.

Specifically, the opposing wall portion 46 that forms the outer periphery, the frame-like portion 56 that constitutes the upper side surface, the extending portion 66 that is formed at the four corners and protrudes downward from the frame-like portion 56, and the permanent magnet EM The shape of the mold is produced so as to have a positioning portion 76 that can come into contact with the inner side surface EMp facing the first coil 13 side. Similarly, the opposing wall portion 46 has a notch in the center portion, and the length dimension of the opposing wall portion 46 in the optical axis direction KD is formed to be smaller than the length dimension of the positioning portion 76. To.

Further, when the permanent magnet EM is accommodated in the fixing member R6, the first gap 6g is provided between the opposing wall portion 46 and the outer surface EMq of the permanent magnet EM (see FIG. 13), and the permanent magnet EM When the lower surface EMz and the lower end surface 66p of the extended portion 66 are aligned, a mold is also prepared so as to have a second gap between the frame-shaped portion 56 and the upper surface EMa of the permanent magnet EM.

Further, an upper spring fixing portion B16 to which the other side (second portion 24) of the upper leaf spring 4A is fixed is formed on the upper surface of the frame-shaped portion 56 of the fixing member R6, and the fixing member R6 is extended. A die is prepared in such a manner that a lower spring fixing portion B26 to which the other side (fourth portion 44) of the lower leaf spring 4C is fixed is formed on the lower side of the portion 66.

Next, in the base member preparation step JD of the preparation step PJ, first, a liquid crystal polymer (LCP) or the like is injection-molded to produce a first molding member that supports the conductive portion 7c and the terminal T9. Next, a catalyst treatment for plating the first molded member is performed. Next, the first molding member is set in a mold, and the second molding member is injection-molded so as to cover portions other than the portions corresponding to the conductive portion 7c and the terminal T9. Thereby, the outer shape is formed in an annular shape having a rectangular plate shape and a circular opening, and a base portion 17 having a frame shape, an adhesive placement portion 37 provided on the upper surface side of the base member 7, A molded member having a thin portion 57 positioned at a corner of the base member 7 is produced. Finally, a plating film is formed in the order of copper plating, nickel plating, and gold plating on the portion where the first molded member is exposed on the surface. In this way, the base member 7 is produced in which the conductive portion 7c and the terminal T9 are three-dimensionally wired on the upper surface, the lower surface 17u, and the side surfaces.

And when producing the base member 7, a desired shape can be obtained by predetermining the shape of the mold in the same manner as the fixing member R6. Specifically, the thin portion 57 has a through hole 7h through which the suspension wire 5 is inserted, and a plating portion 7m made of a metal film formed around the through hole 7h and on the inner surface of the through hole 7h. The mold is prepared so that the lower surface 57v of the thin portion 57 is positioned above the lower surface 17u of the base portion 17.

Further, when the base member 7 is manufactured, at least a part of the thin portion 57 and the base portion 17 has a step and is connected by the wall portion 57w, and the lower surface 57v and the wall portion 57w of the thin portion 57 are formed. The first molded member and the second molded member are configured so that plating is performed with the same metal film as the plating portion 7m.

Next, in the multilayer substrate manufacturing step JE of the preparation step PJ, a plurality of multilayer substrates 98 are formed on the mother substrate using a mother substrate in which conductive layers are formed in multiple layers, and divided processing is performed. 98 is manufactured. At this time, in the first embodiment of the present invention, the multilayer substrate 98 is constituted by two substrates shaped so as to be opposed to each other with the central portion of the lens holding member 2 interposed therebetween, so that it is formed by one connected substrate. Compared with the case where it is, the two multilayer substrates 98 can be arranged on the mother substrate with a high yield. For this reason, the manufacturing cost of the multilayer substrate 98 can be suppressed.

In addition, the second coil 23 in which a plurality of spiral coil patterns are laminated is prepared on the multilayer substrate 98. In that case, when the two multilayer substrates 98 are assembled, each of the pair of second coils 23 facing each other with the lens holding member 2 therebetween is the same size in a plan view as viewed from the optical axis direction KD. It should be provided point-symmetrically. As a result, when a current is passed through the second coil 23, a force that rotates the movable unit KU is not generated, and can be appropriately driven in a direction that intersects the optical axis (crossing direction CD) with good balance. .

Next, in the preparation process JA of the preparation process PJ, a magnetic detection member 88 in which a magnetic detection element (GMR element) is packaged with a thermosetting synthetic resin is manufactured. In that case, using a resin package substrate with a pattern with the four terminal parts exposed to the outside, a magnetic detection element (GMR element) is mounted on this resin package substrate, and the wires are connected to each other by wire bonding. After you have packaged.

Then, these two magnetic detection members 88 are mounted on the lower surface of the multilayer board 98 using a mounter machine or the like. In that case, the magnetic detection member 88 is mounted on the extension line in the longitudinal direction of the two adjacent second coils 23 so that the magnetic detection element is not easily affected by the magnetic field generated by the second coil 23. I am doing so.

Further, two magnetic detection elements are collectively mounted (mounted) on one divided multilayer substrate 98, and a magnetic detection member 88 (magnetic detection element) is mounted only on a minimum substrate, Productivity is improved.

In the preparation process JA of the preparation process PJ, polybutylene terephthalate (PBT) or the like is injection-molded to produce a frame W9 having a rectangular opening at the center and having a substantially rectangular shape. Then, two sets of penetrating holes W9k through which the protrusions B16t of the upper spring fixing portion B16 are inserted are formed at the four corners of the frame body W9.

Further, in the preparation process JA of the preparation process PJ, a metal plate made of a non-magnetic metal material is used, and cutting, drawing, etc. are performed, and the outer shape is formed in a box shape and has a substantially rectangular shape (in plan view). The case member H9 is manufactured.

Next, the assembly process PK will be described.

First, as shown in FIG. 18, a permanent magnet mounting step LA for mounting the permanent magnet EM on the fixing member R6 is performed in advance. When incorporating the permanent magnet EM into the fixing member R6, the permanent magnet EM is placed on a flat jig, and is further placed so as to cover the fixing member R6. Thereby, the lower surface EMz of the permanent magnet EM and the lower end surface 66p of the extending part 66 of the fixing member R6 can be easily matched on the same plane. As a result, the permanent magnet EM can be arranged with high accuracy. Note that a thermosetting adhesive is applied in advance to a portion of the second gap generated between the upper surface EMa of the permanent magnet EM and the frame-like portion 56 of the fixing member R6.

Further, after the permanent magnet EM is incorporated into the fixing member R6, an ultraviolet curable adhesive is applied to the notch 46k (concave portion) of the facing wall portion 46. By having the notch 46k, the adhesive can be easily applied. Further, since the fixing member R6 and the permanent magnet EM can be bonded to each other at a wide area between the opposing wall portion 46 and the outer surface of the permanent magnet EM, the permanent magnet EM is fixed to the fixing member R6 with high strength. be able to.

Further, after applying an ultraviolet curable adhesive, a thin jig is inserted between the permanent magnet EM and the facing wall portion 46 to bring the inner side surface EMp of the permanent magnet EM into contact with the positioning portion 76. In this state, the adhesive is irradiated with ultraviolet rays to cure the ultraviolet curable adhesive, and the permanent magnet EM is fixed to the fixing member R6. Thereafter, the jig is removed.

Further, a thermosetting adhesive is applied to the portion of the third gap 6s provided between the extending wall portion 66w of the fixing member R6 and the inner side surface EMp of the permanent magnet EM76, and the thermosetting is performed by heating. The mold adhesive is cured. Thereby, the permanent magnet EM and the fixing member R6 can be firmly fixed at the second gap portion and the third gap 6s portion. Accordingly, even when a strong impact such as dropping is applied, the permanent magnet EM can be reliably prevented from falling off the fixing member R6.

In this way, even if the thickness of the permanent magnet EM varies, the inner surface EMp of the permanent magnet EM and the positioning portion 76 of the fixing member R6 come into contact with each other and are positioned, so that the permanent magnet EM (fixing member R6) When assembled, variations in distance between the inner surface EMp of the permanent magnet EM and the first coil 13 are suppressed, and the permanent magnet EM is accurately arranged. For this reason, the magnetic force that acts on the first coil 13 from the permanent magnet EM is stabilized, and the thrust for moving the lens holding member 2 in the optical axis direction KD is also stabilized.

Next, as shown in FIG. 18, a multilayer substrate mounting step LB for mounting the multilayer substrate 98 on the base member 7 is performed in advance. When fixing the multilayer substrate 98 to the base member 7, first, a thermosetting adhesive is applied to the convex portion inside the groove 37 m of the base member 7. Next, the multilayer substrate 98 is placed on the base member 7. At that time, the protruding adhesive is accommodated in the space of the groove 37m. Finally, the adhesive is heated / cured to fix the multilayer substrate 98 to the base member 7.

Next, an urging member mounting step LC is performed. First, the first portion 14 of the upper leaf spring 4 </ b> A is fixed to the lens holding member 2. At that time, the convex portion 12t of the lens holding member 2 is inserted into the through hole of the first portion 14, and the convex portion 12t is heat caulked so that one side of the upper leaf spring 4A is attached to the lens holding member 2. Secure to.

Next, the fixing member R6 (in which the permanent magnet EM is mounted) manufactured in the permanent magnet mounting step LA and the frame W9 are assembled so as to sandwich the upper leaf spring 4A, and the second portion 24 of the upper leaf spring 4A is assembled. It fixes to upper spring fixing | fixed part B16 (fixing member R6). In that case, the protrusion B16t of the upper spring fixing part B16 is inserted into the through hole of the second part 24 and the hole W9k through which the frame body W9 has passed, and this part is fixed with an adhesive, whereby the upper leaf spring 4A. The other side is fixed to the fixing member R6 side.

Next, the lower leaf spring 4C is assembled. At this time, the third portion 34 of the lower leaf spring 4C and the recessed portion 32r of the lens holding member 2 are fixed with an adhesive, and the fourth portion 44 of the lower leaf spring 4C and the lower spring fixing portion B26 (fixed). The member R6) is fixed with an adhesive.

Next, as shown in FIG. 18, a wire insertion step (first insertion step K1) is performed. In the wire insertion step (first insertion step K1), the suspension wire 5 is inserted through the through portion 64k of the upper leaf spring 4A. Thereby, the wire fixing part 64 and the suspension wire 5 can be easily engaged. Then, after the suspension wire 5 is inserted, an intermediate portion of the suspension wire 5 is clamped with a jig so that the suspension wire 5 is not displaced.

Next, as shown in FIG. 18, after the wire insertion step (first insertion step K1), an application step (first application step K2) is performed. In the application step (first application step K2), a solder paste is applied to the upper surface of the wire fixing portion 64 including the through portion 64k of the upper leaf spring 4A using a dispenser device. As a result, the solder paste can be applied over the entire circumference of the suspension wire 5 and can be soldered over the entire circumference of the suspension wire 5 in the next laser irradiation step (first laser step K3). .

In addition, since this application process (first application process K2) is performed after the wire insertion process (first insertion process K1), the suspension wire 5 is passed through the penetration part 64k in a state where the solder paste is not applied to the penetration part 64k. Can be inserted. For this reason, it is possible to prevent the suspension wire 5 from being deformed due to the presence of the solder paste (the suspension wire 5 may be deformed if the suspension wire 5 is passed through the through portion 64k with the solder paste applied). ).

Next, as shown in FIG. 18, a laser irradiation step (first laser step K3) is performed after the coating step (first coating step K2). In the laser irradiation step (first laser step K3), the projecting portion 84 connected to the wire fixing portion 64 is irradiated with laser light. As a result, the protruding portion 84 of the upper leaf spring 4A is heated by the laser light, and heat is conducted from the protruding portion 84 to the wire fixing portion 64 connected to the protruding portion 84, and the wire fixing portion 64 is heated. For this reason, the solder paste applied to the wire fixing portion 64 is heated to become molten solder HD, and then the solder HD is cooled, and the upper end portion of the suspension wire 5 and the wire fixing portion 64 of the upper leaf spring 4A Will be soldered (soldering process). This improves workability and the like as compared with the case where manual soldering is performed, and can reduce defects in the soldering process.

In the first embodiment of the present invention, since the opening 84k is formed in the protruding portion 84 adjacent to the wire fixing portion 64, the opening 84k is used in the laser irradiation step (first laser step K3). The melted solder HD is blocked, and the solder HD can be prevented from flowing widely toward the protruding portion 84. For this reason, the solder amount of the wire fixing portion 64 is difficult to vary, and the soldering between the wire fixing portion 64 and the upper end portion of the suspension wire 5 can be ensured. Further, since the solder HD does not flow to the portion irradiated with the laser beam (the portion inside the opening 84k), the surrounding synthetic resin material is “burned” due to the scattering of the solder HD by the laser beam and the irregular reflection of the laser beam. Can be prevented.

Furthermore, in the first embodiment of the present invention, the opening 84k is formed by a long through hole (through hole) formed wide in the orthogonal direction orthogonal to the protruding direction of the protruding portion 84, and the opening 84k in this orthogonal direction. Is set larger than the width between the edge of the protrusion 84 and the edge of the opening 84k, the solder HD can be reliably dammed by the opening 84k. For this reason, it is possible to reliably suppress the solder HD from flowing widely toward the protruding portion 84 side.

In the first embodiment of the present invention, the width of the portion between the penetrating portion 64k and the opening 84k is narrower than the width of the protruding portion 84 of the portion located inside the opening 84k. The outer shape (footprint) of the solder fillet formed around the suspension wire 5 is regulated by the portion where the width is narrow. For this reason, it is possible to prevent the solder fillet from spreading greatly and to reduce the variation in the solder amount of the wire fixing portion 64. Note that the jig is removed from the suspension wire 5 after the soldering step.

Next, the main body is inverted with the upper leaf spring 4A on the lower side, and a wire insertion step (second insertion step K4) is performed as shown in FIG. In the wire insertion step (second insertion step K4), the base member 7 (with the multilayer substrate 98 attached) produced in the multilayer substrate attachment step LB is assembled from above, and the suspension wire 5 is inserted into the through hole 7h of the base member 7. Is inserted. Thereby, the base member 7 and the suspension wire 5 can be easily engaged. In the following coating process (second coating process K5) and laser irradiation process (second laser process K6), the main body is inverted with the upper leaf spring 4A on the lower side in order to facilitate manufacturing. do not have to.

Next, as shown in FIG. 18, after the wire insertion step (second insertion step K4), an application step (second application step K5) is performed. In the application process (second application process K5), a solder paste is applied to the through hole 7h of the base member 7 and the plating part 7m located around the through hole 7h from the lower surface 57v side of the thin part 57 using a dispenser device. . As a result, the solder paste can be applied over the entire circumference of the suspension wire 5 and can be soldered over the entire circumference of the suspension wire 5 in the next laser irradiation step (second laser step K6). .

Further, since this coating step (second coating step K5) is performed after the wire insertion step (second insertion step K4), the suspension wire 5 is passed through the through-hole 7h in a state where the solder paste is not applied to the through-hole 7h. Can be inserted. For this reason, it is possible to prevent the suspension wire 5 from being deformed due to the presence of the solder paste (the suspension wire 5 may be deformed if the suspension wire 5 is passed through the through hole 7h with the solder paste applied). ).

Further, in the base member manufacturing step JD, since the through hole 7h is provided in the thin part 57 formed with a thickness dimension smaller than that of the base part 17, the surface area of the plating part 7m formed on the inner surface of the through hole 7h is reduced. be able to. For this reason, in this application | coating process (2nd application | coating process K5), the quantity of the solder paste with which the inner surface of the through-hole 7h is filled can be decreased.

Next, as shown in FIG. 18, a laser irradiation step (second laser step K6) is performed after the coating step (second coating step K5). In the laser irradiation step (second laser step K6), the solder paste is directly irradiated with laser light. As a result, the solder paste is directly heated to become molten solder HD, and then the solder HD is cooled, and the plated portion formed around the lower end portion of the suspension wire 5, the through hole 7h, and the inner surface of the through hole 7h. 7m will be soldered. For this reason, the suspension wire 5 is securely fixed to the plate-like and rigid base member 7. As a result, the suspension wire 5 can be stably supported and the control of the cross direction CD that intersects the optical axis direction KD for camera shake correction can be stably performed as compared with the FPC 933 that is the film base material of the conventional example. Can be made. In addition, since it is a spot heating system using laser light, productivity is good. In the laser irradiation step (second laser step K6), the solder paste is directly irradiated with laser light, and therefore, the laser output is smaller than the laser output in the laser irradiation step (first laser step K3).

In the first embodiment of the present invention, in the laser irradiation step (second laser step K6), laser light is applied from the lower surface (downward) side of the base member 7 (the side opposite to the side where the movable unit KU is disposed). Is being irradiated. Thereby, even if the flux or solder HD is scattered by the laser light irradiation and hits the lower surface 57v and the wall portion 57w, the same metal film as the plating portion 7m is formed on the lower surface 57v and the wall portion 57w. Therefore, it can suppress that the synthetic resin material which comprises the base member 7 of the lower surface 57v and the wall part 57w burns. Furthermore, even if a portion of the laser light hitting the solder paste is irregularly reflected by the laser light irradiation and hits the wall 57w, the synthetic resin material constituting the base member 7 of the wall 57w is burnt. Can be suppressed.

In addition, heat can be radiated by the metal film formed on the lower surface 57v and the wall part 57w, and the metal film is connected to the terminal part (conductive part 7c) formed on the base part 17 from the wall part 57w. Excess heat can be further dissipated by the metal film and the terminal portion. As a result, the amount of heat applied to the thin portion 57 can be reduced, and damage to the base member 7 can be further suppressed.

Furthermore, in the first embodiment of the present invention, since the amount of solder paste filled in the inner surface of the through hole 7h is reduced in the coating process (second coating process K5), this laser irradiation process (second laser process) In step K6), the amount of heat applied to the solder paste can be reduced, and damage to the base member 7 can be suppressed.

In the first embodiment of the present invention, since the outermost layer of the metal film is gold, the solderability is good in the laser irradiation step (second laser step K6). Further, since the reflectivity of the laser beam by gold is high (about 95%), the laser beam hitting the solder paste or the solder HD is irregularly reflected, and a part of the laser beam is temporarily applied to the lower surface 57v or the wall portion 57w of the thin portion 57. Even if it hits, it is reflected reliably. For this reason, the amount of heat given to the thin portion 57 and the wall portion 57w can be further reduced, and damage to the base member 7 can be further suppressed.

Finally, as shown in FIG. 18, a case member mounting step LD is performed. In the case member mounting step LD, an adhesive is applied to the inside of the case member H9, and the case member H9 is mounted on the base member 7 so as to accommodate the movable unit KU, the suspension wire 5, and the like. Then, the case member H9 and the base member 7 are fixed by curing the adhesive.

The effects of the lens driving device 100 according to the first embodiment of the present invention configured as described above will be described below.

In the lens driving device 100 according to the first embodiment of the present invention, the permanent magnet EM is fixed to the fixing member R6 in a state where the inner surface EMp of the permanent magnet EM and the positioning portion 76 of the fixing member R6 are in contact and positioned. Therefore, even if the thickness of the permanent magnet EM varies, variation in the distance between the inner surface EMp of the permanent magnet EM and the first coil 13 is suppressed, and the permanent magnet EM is arranged with high accuracy. For this reason, the magnetic force that acts on the first coil 13 from the permanent magnet EM is stabilized, and the thrust for moving the lens holding member 2 in the optical axis direction KD is also stabilized.

Further, at both ends in the longitudinal direction intersecting the optical axis direction KD of the plate-like permanent magnet EM, an extending portion 66 extending along the optical axis direction KD is provided on the fixing member R6, and this extending portion 66 is provided. Since the positioning portion 76 is provided on the inner surface EMp, the permanent magnet EM is positioned on the inner side surfaces EMp on both ends in the longitudinal direction. Thereby, the positional deviation of the permanent magnet EM is suppressed, and the positioning accuracy between the permanent magnet EM and the first coil 13 can be easily ensured.

Further, since the adhesive is provided in the first gap 6g between the opposing wall portion 46 provided between the adjacent extending portions 66 and the outer surface EMq of the permanent magnet EM, the outer surface EMq The permanent magnet EM and the fixing member R6 can be bonded to each other at a wide area with the facing wall portion 46. For this reason, the permanent magnet EM can be fixed to the fixing member R6 with strong strength, and even if a strong impact such as dropping is applied, the permanent magnet EM can be prevented from falling off the fixing member R6.

Moreover, since the opposing wall portion 46 is continuously provided between the adjacent extending portions 66, the strength of the fixing member R6 that fixes the permanent magnet EM can be increased. For this reason, since deformation of the fixing member R6 is suppressed, the permanent magnet EM can be arranged with higher accuracy. Moreover, since it has the notch 46k in the center part of the opposing wall part 46, using this notch 46k, an adhesive agent can be apply | coated easily, or ultraviolet rays are irradiated to the adhesive agent from the outside, The adhesive can also be cured. By these things, the lens drive device 100 can be assembled easily.

Further, since the length dimension of the positioning portion 76 in the optical axis direction KD is larger than the length dimension of the opposing wall portion 46, the opposing wall portion 46 is made small and thin without affecting the positioning accuracy of the permanent magnet EM. Can be formed. For this reason, the external shape of fixing member R6 can be made small, and the lens drive device 100 can be reduced in size.

Further, since the extending portion 66 has the lower end surface 66p at the same height (in the optical axis direction KD) as the lower surface EMz of the permanent magnet EM, the dimension in the optical axis direction KD (height direction) of the permanent magnet EM is Even if there is a variation, the permanent magnet EM can be arranged with high accuracy on the basis of the lower end surface 66p of the extending portion 66 and the lower surface EMz of the permanent magnet EM. In addition, since the second gap is provided between the upper surface of the permanent magnet EM and the frame-like portion 56 of the fixing member R6, the dimensional variation of the permanent magnet EM can be absorbed by the second gap. For this reason, variation in the distance between the lower surface EMz of the permanent magnet EM and the second coil 23 is suppressed, and the magnetic force acting on the second coil 23 from the permanent magnet EM is stabilized. As a result, variations in thrust in the intersecting direction can be suppressed, and the movable unit KU can be driven stably.

It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented by being modified as follows, for example, and these embodiments also belong to the technical scope of the present invention.

FIG. 19 is a diagram for explaining a modification of the lens driving device 100. FIG. 19A is an enlarged top view showing a modification 3 of the upper leaf spring 4A, and FIG. FIG. 19C is an enlarged top perspective view showing Modification Example 4 to Modification Example 8 of the base member 7. FIG.

<Modification 1>
In the first embodiment, the upper spring fixing portion B16 and the lower spring fixing portion B26 to which the other side of the urging member 4 (upper leaf spring 4A, lower leaf spring 4C) is fixed are integrally provided on the fixing member R6. However, the present invention is not limited to this, and separate members may be used.

<Modification 2>
In the first embodiment, the opening portion 84k is preferably formed by a through hole. However, the present invention is not limited to this, and the opening may be formed by a concave portion (a hollow portion) having a step.

<Modification 3><Modification4>
In the first embodiment, as shown in FIG. 10A, the penetrating portion 64k through which the suspension wire 5 is inserted is formed by a penetrating hole. However, the present invention is not limited to this. For example, as shown in FIG. 19 (a), it may be a notch-shaped through-hole C64k partially cut away, or {Modification 3}, or as shown in FIG. The shape may be a notch-shaped through-hole D64k {Modification 4}.

<Modification 5>
In the first embodiment, the base member 7 is preferably used as the support member that supports the lower end portion of the suspension wire 5, but the present invention is not limited to this. For example, the lower end portion of the suspension wire 5 may be fixed to the multilayer substrate 98, and the multilayer substrate 98 may be used as a support member.

<Modification 6><Modification7>
In the first embodiment, as shown in FIG. 15B, the lower surface 57v of the thin portion 57 and the lower surface 17u of the base portion 17 are connected by a wall portion 57w having a vertical wall. The configuration is not limited, and at least a part of the thin portion 57 and the base portion 17 may be connected with a step. For example, as shown in FIG. 19C, the wall portion E57w may have an inclined wall formed obliquely with respect to the lower surface 57v of the thin portion 57 {Modification 6}, or the thin portion 57. And the base portion 17 may not be connected with a step from the lower surface 57v of the thin portion 57 but may be directly connected (WP shown in FIG. 19C).

<Modification 8>
In the first embodiment, as shown in FIG. 15B, the same metal film as the plating portion 7m is formed on the lower surface 57v of the thin portion 57 and the vertical wall portion of the wall portion 57w. However, the present invention is not limited to this, and a metal film (MP shown in FIG. 19C) may be formed from the wall portion E57w to the lower surface 17u of the base portion 17 as shown in FIG. 19C. Thereby, excess heat can be further radiated by the metal film of this portion, and the amount of heat given to the thin portion 57 can be further reduced.

<Modification 9>
In the first embodiment, a GMR element is preferably used as the magnetic detection member 88. However, in addition to this, an MR (Magneto Resistive) element or an AMR (Anisotropic Magneto Resistive) of the type in which the electric resistance is changed by a change in magnetic field. An element, a TMR (Tunnel Magneto Resistive) element, etc. may be sufficient. Moreover, it is not limited to the type in which the electric resistance changes due to the change of the magnetic field, and for example, a Hall element may be used.

The present invention is not limited to the above embodiment, and can be appropriately changed without departing from the gist of the present invention.

KU movable unit 2 lens holding member D1 first driving mechanism 13 first coil EM permanent magnet EMa upper surface EMz lower surface EMp inner side surface EMq outer side surface D2 second driving mechanism 23 second coil 4 biasing member 4A upper leaf spring 4C lower leaf spring 14 First part 24

Second part

54A, 54C Elastic arm part 64 Wire fixing part 64k, C64k, D64k Through part 74 Connection part 74e Extension part 84 Projection part 84k Opening part 5 Suspension wire B16 Upper spring fixing part R6 Fixing member 46 Opposing wall part 56 Frame-like part 66 Extension part 66p Lower end surface 76 Positioning part 6g First gap 7 Base member (supporting member)
17 base portion 17u lower surface 37 adhesive placement portion 37m groove portion 57 thin wall portion 57w, E57w wall portion 57v lower surface 7c conductive portion 7h through hole 7m plating portion M8 detecting means 98 multilayer substrate K1 first insertion step (wire insertion step)
K2 First application process (application process)
K3 First laser process (laser irradiation process)
K4 2nd insertion process (wire insertion process)
K5 Second application process (application process)
K6 Second laser process (laser irradiation process)
KD Optical axis direction 100 Lens drive device

Claims

A lens holding member capable of holding the lens body;
A first coil fixed around the lens holding member;
A permanent magnet provided on the outside of the first coil so as to face the first coil;
An urging member that supports the lens holding member so as to be movable in the optical axis direction;
A fixing member to which the permanent magnet is fixed,
In the lens driving device constituting the first driving mechanism in which at least the first coil and the permanent magnet move the lens holding member in the optical axis direction,
The fixing member has a positioning portion that can contact an inner surface facing the first coil side of the permanent magnet, and an opposing wall portion facing the outer surface of the permanent magnet on the opposite side to the inner surface. And
The lens driving device, wherein the permanent magnet is fixed to the fixing member in a state where the permanent magnet is positioned at the positioning portion.
The permanent magnet has a plate shape,
The fixing member is formed in a frame shape, and has extended portions extending along the optical axis direction at positions on both ends in the longitudinal direction intersecting the optical axis direction of the permanent magnet. And
The lens driving device according to claim 1, wherein each of the extending portions is provided with the positioning portion facing the inner surface of the permanent magnet.
An accommodation space in which at least a part of the permanent magnet can be arranged is formed by the positioning portion and the opposing wall portion,
The opposing wall portion is provided between the adjacent extending portions,
A first gap is provided between the outer surface of the permanent magnet and the opposing wall;
The lens driving device according to claim 2, wherein an adhesive is provided at least in the first gap.
4. The lens driving device according to claim 3, wherein the opposing wall portion is provided continuously between the adjacent extending portions and has a notch in a central portion.
5. The lens driving device according to claim 2, wherein a length dimension of the positioning portion in the optical axis direction is larger than a length dimension of the opposing wall portion in the optical axis direction. .
A movable unit is configured including at least the lens holding member and the first drive mechanism;
A second drive mechanism for moving the movable unit in a direction crossing the optical axis direction;
The fixing member has a frame-like portion that projects the extending portion downward.
The second drive mechanism includes at least the permanent magnet and a second coil disposed below the permanent magnet,
The extending portion has a lower end surface at the same height as the lower surface of the permanent magnet in the optical axis direction, and a second gap between the upper surface of the permanent magnet and the frame-shaped portion of the fixing member. 6. The lens driving device according to claim 2, further comprising: