CN215895077U - Lens driving device and camera module - Google Patents

Abstract

A lens driving device and a camera module are provided, wherein a magnetic detection unit can be arranged on a lens holding component by a smaller number of components. The lens driving device (101) has a magnetic detection unit (MD). The magnetic detection unit has a detection magnet (10) fixed to a magnet holding Member (MH) and a magnetic detection member (11) fixed to a lens holding member (2). The magnetic detection element is composed of an electronic element provided with a1 st terminal (TR1) to a 6 th terminal (TR 6). The 1 st to 6 th conductive patterns (CP1 to CP6) formed in the lens holding member are connected to the 1 st to 6 th terminals. The 1 st to 4 th conductive patterns (CP1, CP4) are connected to an inner portion (16i) of the upper leaf spring (16). The 5 th conductive pattern (CP5) and the 6 th conductive pattern (CP6) are connected to the end of the wire (33) that constitutes the movable coil (3).

Description

Lens driving device and camera module

Technical Field

The present invention relates to a lens driving device mounted on a portable device with a camera or the like and a camera module including the lens driving device.

Background

Conventionally, there is known a lens driving device including a movable section frame (movable-side member) supported so as to be movable in a direction intersecting an optical axis of a lens in order to realize a shake correction function, and a lens mounting table (lens holding member) supported so as to be movable in a direction parallel to the optical axis of the lens (hereinafter referred to as "optical axis direction") with respect to the movable section frame in order to realize an automatic focus adjustment function (see patent document 1).

In this lens driving device, the lens holding member is coupled to the movable-side member disposed so as to surround the lens holding member by a flat plate spring attached to the upper surface of the movable-side member. Further, an upper circuit board is placed on the leaf spring, and the movable-side member and the lower circuit board are connected by a suspension wire having an upper end fixed to an outer portion of the leaf spring.

Further, a lower flap plate is formed on the upper circuit board, and a hall element is provided on the lower flap plate. The hall element is provided so as to face the detection magnet attached to the lens holding member, and is configured to be able to detect the position of the lens holding member in the optical axis direction.

Patent document 1: japanese patent laid-open publication No. 2014-219675

However, the lens driving device has the following problems: the number of components is increased by the need for an upper circuit board or the like for mounting the hall element.

SUMMERY OF THE UTILITY MODEL

Therefore, it is desirable to provide a magnetic detection member such as a hall element in the lens holding member with a smaller number of members.

A lens driving device according to claim 1 of an embodiment of the present invention includes: a movable-side member including a lens holding member capable of holding the lens body and a1 st driving mechanism for moving the lens holding member in the optical axis direction; 4 wires that support the movable-side member so as to be movable in a direction intersecting the optical axis direction; a2 nd driving mechanism for moving the movable-side member in a direction intersecting the optical axis direction; a cover member having an outer peripheral wall portion and a top plate portion, and accommodating the movable-side member; and a base member disposed on the opposite side of the top plate with the movable side member interposed therebetween, and constituting a housing together with the cover member, the movable side member including: a coil held on an outer surface of the lens holding member; a drive magnet disposed outside the coil and facing the coil; a magnet holding member for fixing the driving magnet; and an upper plate spring and a lower plate spring that are arranged to connect the lens holding member and the magnet holding member and to support the lens holding member so as to be movable in an optical axis direction, wherein the upper plate spring is divided into at least 4 divided spring portions including a1 st divided spring portion, a2 nd divided spring portion, a3 rd divided spring portion, and a4 th divided spring portion, and the 1 st to 4 th divided spring portions each include: a1 st support part fixed to the lens holding member; a2 nd support part fixed to the magnet holding member; an elastic arm portion provided between the 1 st support portion and the 2 nd support portion; a wire fixing portion located outside the 2 nd support portion and connected to upper end portions of 1 corresponding wire of the 4 wires; and a connection portion provided to connect the 2 nd support portion and the wire fixing portion, wherein the lens holding member has a plurality of conductive patterns including a1 st conductive pattern, a2 nd conductive pattern, a3 rd conductive pattern, a4 th conductive pattern, a 5 th conductive pattern, and a 6 th conductive pattern, the lens driving device includes a magnetic detection unit for detecting a position of the lens holding member in an optical axis direction, the magnetic detection unit includes: a detection magnet fixed to the magnet holding member; and a magnetic detection member that detects a magnetic field of the detection magnet and is fixed to the lens holding member separately from the detection magnet, the magnetic detection member having a function of detecting the magnetic field of the detection magnet and a function of supplying a current to the coil, and being composed of an electronic member provided with 6 terminals including a1 st terminal, a2 nd terminal, a3 rd terminal, a4 th terminal, a 5 th terminal, and a 6 th terminal, the 1 st conductive pattern being connected to the 1 st terminal and to the 1 st supporting portion of the 1 st divided spring portion, the 2 nd conductive pattern being connected to the 2 nd terminal and to the 1 st supporting portion of the 2 nd divided spring portion, the 3 rd conductive pattern being connected to the 3 rd terminal and to the 1 st supporting portion of the 3 rd divided spring portion, the 4 th conductive pattern is connected to the 4 th terminal and to the 1 st supporting portion of the 4 th divided spring portion, the 5 th conductive pattern is connected to the 5 th terminal and to one end portion of a wire rod constituting the coil, and the 6 th conductive pattern is connected to the 6 th terminal and to the other end portion of the wire rod constituting the coil.

The lens driving device according to claim 2 is the lens driving device according to claim 1, wherein the cover member is configured such that the top plate portion is formed in a substantially rectangular shape in outline, the outer peripheral wall portion has 4 side plate portions, the lens holding member has 8 side portions each including 4 side portions corresponding to the 4 side plate portions and other 4 side portions respectively disposed between adjacent 2 side portions of the 4 side portions, the 4 side portions constitute a1 st side portion group, the other 4 side portions constitute a2 nd side portion group, and the magnetism detecting member is disposed on 1 side portion of the other 4 side portions.

The lens driving device according to claim 3 is the lens driving device according to claim 2, wherein 1 of the other 4 side portions has a smaller distance from the optical axis and a larger size in the circumferential direction than the other 3 side portions of the other 4 side portions.

The lens driving device according to claim 4 is the lens driving device according to claim 2, wherein a vibration damping material is disposed between the magnetic detection member and the detection magnet.

The lens driving device according to claim 5 is the lens driving device according to any one of claims 2 to 4, wherein the 5 th conductive pattern and the 6 th conductive pattern are connected to connection portions provided individually on the other 2 side portions of the other 4 side portions different from the 1 side portion of the other 4 side portions, respectively.

A lens driving device according to claim 6 is the lens driving device according to any one of claims 1 to 4, wherein a pattern forming surface on which the plurality of conductive patterns are formed and a coil arrangement surface on which the coil is arranged are provided on an outer periphery of the lens holding member, the coil arrangement surface is arranged on the base member side with respect to the pattern forming surface, a stepped portion is formed between the coil arrangement surface and the pattern forming surface, and an upper end portion of the coil faces a lower surface of the stepped portion in a state in which at least a part of the upper end portion is in contact with the lower surface of the stepped portion.

A lens driving device according to claim 7 is the lens driving device according to claim 5, wherein a pattern forming surface on which the plurality of conductive patterns are formed and a coil arrangement surface on which the coil is arranged are provided on an outer periphery of the lens holding member, the coil arrangement surface is arranged on the base member side with respect to the pattern forming surface, a stepped portion is formed between the coil arrangement surface and the pattern forming surface, and an upper end portion of the coil faces a lower surface of the stepped portion in a state in which at least a part of the upper end portion of the coil is in contact with the lower surface of the stepped portion.

The lens driving device according to claim 8 is the lens driving device according to any one of claims 1 to 4, wherein the 1 st supporting portion of the 1 st divided spring portion includes: a fixing portion fixed to the lens holding member; and a bent portion bent so that a connection portion connected to the 1 st conductive pattern is exposed, wherein the connection portion exposed to the inside of the bent portion and the bent portion are connected by a conductive bonding material.

The lens driving device according to claim 9 is the lens driving device according to claim 6, wherein the 1 st supporting portion of the 1 st division spring portion includes: a fixing portion fixed to the lens holding member; and a bent portion bent so that a connection portion connected to the 1 st conductive pattern is exposed, wherein the connection portion exposed to the inside of the bent portion and the bent portion are connected by a conductive bonding material.

A lens driving device according to claim 10 is the lens driving device according to claim 8, wherein the 1 st supporting portion of the 1 st divided spring portion has an extended portion extended from the bent portion, the bent portion is disposed between the fixed portion and the extended portion, and the fixed portion, the bent portion, and the extended portion are opposed to an upper end surface of the lens holding member.

A lens driving device according to claim 11 is the lens driving device according to claim 9, wherein the 1 st supporting portion of the 1 st divided spring portion has an extended portion extended from the bent portion, the bent portion is disposed between the fixed portion and the extended portion, and the fixed portion, the bent portion, and the extended portion are opposed to an upper end surface of the lens holding member.

The camera module according to claim 12, comprising: any one of lens driving devices of claims 1 to 11; the lens body; and an imaging element facing the lens body.

Effect of the utility model

The lens driving device is configured such that the magnetic detection means can be provided to the lens holding member with a smaller number of components.

Drawings

Fig. 1 is a perspective view of a lens driving device.

Fig. 2 is an exploded perspective view of the lens driving device.

Fig. 3 is an exploded perspective view of the lower member.

Fig. 4 is an exploded perspective view of the movable-side member.

Fig. 5 is a plan view of the upper leaf spring.

Fig. 6(a) and 6(B) are front and rear views of the lens holding member.

Fig. 7(a) and 7(B) are right and left side views of the lens holding member.

Fig. 8(a) and 8(B) are a plan view and a bottom view of the lens holding member.

Fig. 9(a) and 9(B) are perspective views of the lens holding member.

Fig. 10(a) and 10(B) are a plan view of the lens holding member to which the upper plate spring is attached and a bottom view of the lens holding member to which the lower plate spring is attached.

Fig. 11(a) and 11(B) are a plan view of the magnet holding member to which the upper leaf spring is not attached and a plan view of the magnet holding member to which the upper leaf spring is attached.

Fig. 12(a) and 12(B) are a bottom view of the magnet holding member to which the lower leaf spring is not attached and a bottom view of the magnet holding member to which the lower leaf spring is attached.

Fig. 13(a) and 13(B) are perspective views of the lens holding member with the movable coil mounted thereon.

Fig. 14 is a plan view of the lens holding member and the magnet holding member.

Fig. 15 is a perspective view of the metal wire, the coil substrate, and the base member.

Fig. 16 is a perspective view of the terminal member and the upper leaf spring.

Description of the symbols:

2: a lens holding member; 3: a movable coil; 4: a housing; 4A: an outer peripheral wall portion; 4A 1: 1 st side plate part; 4A 2: a2 nd side plate portion; 4A 3: a3 rd side plate part; 4A 4: a4 th side plate part; 4B: a top plate portion; 4 s: a storage section; 5: a drive magnet; 5A: 1 st drive magnet; 5B: a2 nd drive magnet; 5C: a3 rd driving magnet; 5D: a4 th driving magnet; 6: a plate spring; 7: a terminal member; 7A: a1 st terminal member; 7B: a2 nd terminal member; 7C: a3 rd terminal member; 7D: a4 th terminal member; 7E: a 5 th terminal member; 7F: a 6 th terminal member; 7G: a 7 th terminal member; 7H: an 8 th terminal member; 8: a metal wire; 8A: a1 st metal line; 8B: a2 nd metal line; 8C: a3 rd metal line; 8D: a4 th metal line; 9: fixing the coil; 9A: 1 st fixed coil; 9B: the 2 nd fixed coil; 9C: a3 rd fixed coil; 9D: a4 th stationary coil; 10: a magnet for detection; 11: a magnetic detection member; 12: a cylindrical portion; 12 b: a lower stage part; 12 d: an upper base part; 12d 1: 1 st upper stage part; 12d 2: 2 nd upper stage part; 12d 3: the 3 rd upper stage part; 12d 4: 4 th upper stage part; 13: a winding section; 16: an upper side plate spring; 16A: 1 st divided spring part; 16B: a2 nd divided spring part; 16C: a3 rd divided spring part; 16D: a4 th divided spring part; 16e, 16eA to 16 eD: an outer portion; 16f, 16fA to 16 fD: a metal wire fixing part; 16g, 16gA to 16 gD: an elastic arm portion; 16h, 16 hA-16 hD: a connecting portion; 16i, 16iA to 16 iD: an inner portion; 16x, 16xA to 16 xD: a through hole; 17: a coil substrate; 18: a base member; 18k is as follows: an opening; 26: a lower plate spring; 26 e: an outer portion; 26 g: an elastic arm portion; 26 i: an inner portion; 33: a wire rod; 33A: an end portion on the winding start side; 33B: an end portion on the winding end side; 52: a flange portion; 52L: a lower flange portion; 52 LS: a coil arrangement surface; 52U: an upper flange portion; 52 US: a pattern forming surface; 101: a lens driving device; AH1, AH2, AH 3: a through hole; BP: a bending section; and (3) CP: a conductive pattern; CP 1: 1 st conductive pattern; CP 2: a2 nd conductive pattern; CP 3: a3 rd conductive pattern; CP 4: a4 th conductive pattern; CP 5: a 5 th conductive pattern; CP 6: a 6 th conductive pattern; DP: a vibration damping material; DP 1: 1, damping material; DP 2: a2 nd vibration damping material; DP 3: a3 rd vibration damping material; DP 4: a4 th vibration damping material; EP 1: 1 st extension setting part; EP 2: the 2 nd extension setting part; FC 1: a1 st connecting part; FC 2: a2 nd connecting part; FC 3: a3 rd connecting part; FC 4: a4 th connecting part; FC 5: a 5 th connecting part; FC 6: a 6 th connecting part; FC 7: a 7 th connecting part; FC 8: an 8 th connecting part; FC 9: a 9 th connecting part; FC 10: a 10 th connecting part; FC 11: the 11 th connecting part; FC 12: a 12 th connecting part; FP: a fixed part; JD: an optical axis; LB: a lower member; LS: a lower surface; MB: a movable-side member; MD: a magnetic detection unit; MH: a magnet holding member; MK: an axial drive mechanism; p1: a1 st conductive portion; p2: a2 nd conductive portion; p3: a3 rd conductive portion; p4: a4 th conductive part; PR: a protrusion portion; PT: a protrusion; PT 1: 1 st protruding part; PT 2: a2 nd projection; PT 3: a3 rd protruding part; PT 4: a4 th protruding part; RG: a stationary-side member; RK: a radial drive mechanism; RP: an upper side projection; RP 1: 1 st upper side projection; RP 2: 2 nd upper side projection; RP 3: a3 rd upper side protrusion; RS1, RS2, RS 3: a recess; SF: a side portion; SF 1: a1 st side portion; SF 2: a2 nd side portion; SF 3: a3 rd side portion; SF 4: a4 th side portion; SF 5: a 5 th side portion; SF 6: a 6 th side portion; SF 7: a 7 th side portion; SF 8: a 8 th side portion; ST: a step portion; t1: a1 st terminal; t2: a2 nd terminal; t3: a3 rd terminal; t4: a4 th terminal; t5: a 5 th terminal; t6: a 6 th terminal; t7: a 7 th terminal; t8: an 8 th terminal; TR 1: a1 st terminal; TR 2: a2 nd terminal; TR 3: a3 rd terminal; TR 4: a4 th terminal; TR 5: a 5 th terminal; TR 6: a 6 th terminal; WP: an inner wall; WP 1: 1 st inner wall; WP 2: the 2 nd inner wall; WP 3: a3 rd inner wall; WP 4: 4 th inner wall.

Detailed Description

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

As shown in fig. 1 and 2, the lens driving device 101 includes a housing 4 as a part of a fixed-side member RG, and a lower-side member LB.

The housing 4 is a cover member that covers the lower member LB. In the present embodiment, the case 4 is manufactured by performing punching, drawing, and the like on a plate material made of a nonmagnetic metal such as austenitic stainless steel. Since the case 4 is formed of a non-magnetic metal, it does not have a bad influence on the magnetism of the drive mechanism using electromagnetic force.

As shown in fig. 2, the housing 4 has a box-like outer shape defining the housing portion 4 s. The case 4 includes a rectangular tubular outer peripheral wall portion 4A and a flat top plate portion 4B in a rectangular ring shape provided continuously to the upper end (end on the Z1 side) of the outer peripheral wall portion 4A. A circular opening is formed in the center of the top plate 4B. The outer peripheral wall portion 4A includes the 1 st side panel portion 4A1 to the 4 th side panel portion 4A 4. The 1 st side panel 4a1 and the 3 rd side panel 4A3 face each other, and the 2 nd side panel 4a2 and the 4 th side panel 4a4 face each other. The 1 st side panel 4a1 and the 3 rd side panel 4A3 form a1 st side panel group, and the 2 nd side panel 4a2 and the 4 th side panel 4a4 form a2 nd side panel group. The 2 nd side plate portion group extends perpendicularly to the 1 st side plate portion group. That is, the 1 st side plate portion group extends perpendicularly with respect to the 2 nd side plate portion group. As shown in fig. 1, the case 4 is bonded to the base member 18 with an adhesive, and constitutes a frame together with the base member 18.

As shown in fig. 3, lower member LB includes movable-side member MB, metal wire 8 as a part of fixed-side member RG, coil substrate 17, and base member 18.

As shown in fig. 4, the movable member MB includes a lens holding member 2 capable of holding a lens body (not shown), an axial driving mechanism MK as a1 st driving mechanism for moving the lens holding member 2 along an optical axis JD related to the lens body, a plate spring 6 for supporting the lens holding member 2 so as to be movable along the optical axis JD, a magnet holding member MH as a movable supporting member for fixedly supporting the plate spring 6 of the lens holding member 2, and a magnetic detection unit MD for detecting a position of the lens holding member 2 in the optical axis direction. The lens body is, for example, a cylindrical lens barrel including at least one lens, and is configured such that a central axis thereof is along the optical axis JD.

As shown in fig. 4, the axial driving mechanism MK includes a moving coil 3 attached to the lens holding member 2, and a driving magnet 5 disposed apart from the moving coil 3 so as to face the moving coil 3. The axial driving mechanism MK generates a driving force (thrust) by the current flowing through the moving coil 3 and the magnetic field generated by the driving magnet 5, and can move the lens holding member 2 up and down along the optical axis JD. In the present embodiment, the movable coil 3 is a winding type coil, and includes a winding portion 13 as a coil main body portion formed by winding around the lens holding member 2 in an octagonal ring shape. For clarity, in fig. 4, the winding portion 13 is not illustrated in a detailed winding state of the conductive wire material whose surface is covered with the insulating material. The same applies to other drawings illustrating the winding portion 13.

The driving magnet 5 includes a1 st driving magnet 5A to a4 th driving magnet 5D. In the present embodiment, the 1 st to 4 th driving magnets 5A to 5D are each a rectangular parallelepiped permanent magnet magnetized to have two poles, and the inside (the side facing the optical axis JD) is magnetized to have an S pole and the outside is magnetized to have an N pole. The 1 st to 4 th driving magnets 5A to 5D are disposed apart from the moving coil 3 so as to face the moving coil 3.

In the present embodiment, the 1 st to 4 th driving magnets 5A to 5D have the same shape. However, the 1 st to 4 th driving magnets 5A to 5D may have different shapes. For example, the width (thickness) in the radial direction of the 1 st driving magnet 5A and the 3 rd driving magnet 5C may be different from the width (thickness) in the radial direction of the 2 nd driving magnet 5B and the 4 th driving magnet 5D.

The magnet holding member MH is configured to be able to hold the driving magnet 5. In the present embodiment, the magnet holding member MH is formed by injection molding a synthetic resin such as a Liquid Crystal Polymer (LCP). As shown in fig. 4, the magnet holding member MH is a rectangular ring-shaped frame in a plan view, and the 1 st to 4 th driving magnets 5A to 5D are arranged inside each of the 4 sides constituting the frame. Specifically, the 1 st to 4 th driving magnets 5A to 5D are fixed to the magnet holding member MH with an adhesive.

The plate spring 6 is configured to support the lens holding member 2 movably in a direction parallel to the optical axis JD with respect to the magnet holding member MH. In the present embodiment, the plate spring 6 is made of a metal plate made of, for example, a copper alloy, a titanium-copper alloy (titanium copper), a copper-nickel alloy (nickel-tin-copper), or the like as a main material. As shown in fig. 4, the plate spring 6 includes an upper plate spring 16 disposed on the 1 st end surface of the magnet holding member MH on the Z1 side and a lower plate spring 26 disposed on the end surface of the magnet holding member MH on the Z2 side.

The upper plate spring 16 is divided into 4 divided spring portions. In the present embodiment, the 4 divided spring portions are the 1 st, 2 nd, 3 rd and 4 th divided spring portions 16A, 16B, 16C and 16D.

The magnetic detection unit MD includes a detection magnet 10 fixed to the magnet holding member MH, and a magnetic detection member 11 separated from the detection magnet 10 and fixed to the lens holding member 2.

The detection magnet 10 is a rectangular parallelepiped permanent magnet magnetized to have two poles so that the upper side and the lower side have different magnetic poles. The detection magnet 10 is fixed to the magnet holding member MH so that the inner surface thereof is exposed. The magnetic detection means 11 is configured to have a function of detecting the magnetic field of the detection magnet 10 (magnetic field detection function) and a function of supplying a current to the moving coil 3 (current supply function). In the present embodiment, the magnetic detection member 11 is a member incorporating a magnetic sensor, and is constituted by an electronic member provided with 6 terminals.

Specifically, the magnetic detection function is configured to detect the position of the lens holding member 2 by measuring the magnetic flux density of the detection magnet 10 using a hall element. However, the magnetic detection function may be configured to measure a resistance value that changes according to a change in the magnitude of the magnetic field from the detection magnet 10 using, for example, a Giant Magnetoresistive (GMR) element, and detect the position of the lens holding member 2 with respect to the magnet holding member MH to which the detection magnet 10 is attached. Alternatively, the magnetic detection function may be configured to detect the position of the lens holder 2 by using another magnetoresistive element such as a Semiconductor Magnetoresistive (SMR) element, an Anisotropic Magnetoresistive (AMR) element, or a Tunnel Magnetoresistive (TMR) element.

As shown in fig. 3, the wire 8 extends in the optical axis direction, and is configured to support the movable member MB so as to be movable in a direction not parallel to the optical axis JD with respect to the fixed member RG. In the present embodiment, the metal wire 8 is a suspension wire formed of a metal material having conductivity and excellent elasticity, such as a copper alloy, and includes the 1 st metal wire 8A to the 4 th metal wire 8D. The wire 8 supports the magnet holding member MH movably in a direction perpendicular to the optical axis JD with respect to the base member 18 as the stationary-side member RG. As shown in fig. 3, the 1 st to 4 th wires 8A to 8D are fixed at their lower ends (ends on the Z2 side) to the base member 18 (terminal member 7) by solder, conductive adhesive, or the like, and at their upper ends (ends on the Z1 side) to the wire fixing portions 16f of the upper leaf springs 16 by solder, conductive adhesive, or the like (see fig. 5).

The conductive adhesive is, for example, an adhesive in which a conductive filler such as silver particles is dispersed in a synthetic resin. The conductive adhesive may be a thermosetting type, an ultraviolet curing type, or a moisture curing type.

The base member 18 is a wire support member that supports the lower end portions of the 1 st wire 8A to the 4 th wire 8D. With this configuration, the movable member MB is supported by the 1 st to 4 th wires 8A to 8D so as to be movable in the X-axis direction and the Y-axis direction, which are directions perpendicular to the optical axis JD.

The coil substrate 17 is a multilayer substrate including the fixed coil 9 constituting the radial driving mechanism RK as the 2 nd driving mechanism. In the present embodiment, the fixed coil 9 is a thin film type coil, and includes a1 st fixed coil 9A to a4 th fixed coil 9D as shown in fig. 3. The stationary coil 9 may be a wound type or a laminated type.

The radial drive mechanism RK includes a1 st radial drive mechanism that moves the magnet holding member MH in an X-axis direction perpendicular to the optical axis JD and a2 nd radial drive mechanism that moves the magnet holding member MH in a Y-axis direction perpendicular to the optical axis JD and the X-axis, respectively.

The 1 st radial drive mechanism includes a1 st fixed coil 9A and a3 rd fixed coil 9C provided on the coil substrate 17, a1 st drive magnet 5A (see fig. 4)) disposed apart from the 1 st fixed coil 9A in the Z-axis direction so as to face the 1 st fixed coil 9A, and a3 rd drive magnet 5C (see fig. 4)) disposed apart from the 3 rd fixed coil 9C in the Z-axis direction so as to face the 3 rd fixed coil 9C.

The 2 nd radial drive mechanism includes a2 nd fixed coil 9B and a4 th fixed coil 9D provided on the coil substrate 17, a2 nd drive magnet 5B (see fig. 4.) disposed apart from the 2 nd fixed coil 9B in the Z-axis direction so as to face the 2 nd fixed coil 9B, and a4 th drive magnet 5D (see fig. 4.) disposed apart from the 4 th fixed coil 9D in the Z-axis direction so as to face the 4 th fixed coil 9D.

The lens driving device 101 having a substantially rectangular parallelepiped shape is mounted on a main substrate (not shown) on which an imaging element (not shown) is mounted, for example. The camera module is configured by, for example, a main substrate, a lens driving device 101, a lens body attached to the lens holding member 2, and an image pickup element attached to the main substrate so as to face the lens body. The movable coil 3 is connected to the magnetic detection member 11 via a conductive pattern CP (see fig. 6a and 6B) formed on the lens holding member 2. The magnetic detection member 11 is connected to a voltage source or the like via the conductive pattern CP, the upper plate spring 16, the metal wire 8, the base member 18, and the main substrate. The fixed coil 9 is connected to a current supply source via the coil substrate 17, the base member 18, and the main substrate. Therefore, the upper plate spring 16 and the metal wire 8 are formed of a conductive material. When a current flows in the movable coil 3, the axial driving mechanism MK generates an electromagnetic force in a direction parallel to the optical axis JD. Similarly, the radial driving mechanism RK generates an electromagnetic force in a direction perpendicular to the optical axis JD when a current flows in the stationary coil 9.

The lens driving device 101 realizes an automatic focus adjustment function, which is one of lens adjustment functions, by moving the lens holding member 2 in a direction parallel to the optical axis JD on the Z1 side (object side) of the image pickup device by an electromagnetic force generated by the axial driving mechanism MK in the direction parallel to the optical axis JD. Specifically, the lens driving device 101 can perform macro photography by moving the lens holding member 2 in a direction away from the image pickup device, and can perform infinity photography by moving the lens holding member 2 in a direction close to the image pickup device.

The lens driving device 101 moves the lens holding member 2 in a direction perpendicular to the optical axis JD on the Z1 side (object side) of the image pickup element by an electromagnetic force in the direction perpendicular to the optical axis JD generated by the radial driving mechanism RK, thereby realizing a shift function (shake correction function) as another lens adjustment function.

Next, the details of the upper leaf spring 16 will be described with reference to fig. 5. Fig. 5 is a plan view of the upper leaf spring 16.

As shown in fig. 5, the upper plate spring 16 includes an inner portion 16i as a1 st support portion fixed to the lens holding member 2, an outer portion 16e as a2 nd support portion fixed to the magnet holding member MH, an elastic arm portion 16g positioned between the inner portion 16i and the outer portion 16e, a wire fixing portion 16f positioned outside the outer portion 16e and connected to an upper end portion of the wire 8 (see fig. 3), and a connecting portion 16h provided to connect the outer portion 16e and the wire fixing portion 16 f.

Specifically, as shown in fig. 5, the 1 st divided spring portion 16A includes an inner portion 16iA, an outer portion 16eA, an elastic arm portion 16gA, a wire fixing portion 16fA, and a pair of coupling portions 16 hA. Similarly, the 2 nd divided spring portion 16B has an inner portion 16iB, an outer portion 16eB, an elastic arm portion 16gB, a wire fixing portion 16fB, and a pair of coupling portions 16hB, the 3 rd divided spring portion 16C has an inner portion 16iC, an outer portion 16eC, an elastic arm portion 16gC, a wire fixing portion 16fC, and a pair of coupling portions 16hC, and the 4 th divided spring portion 16D has an inner portion 16iD, an outer portion 16eD, an elastic arm portion 16gD, a wire fixing portion 16fD, and a pair of coupling portions 16 hD.

The wire fixing portion 16f is formed with a through hole 16x through which the upper end portion of the wire 8 is inserted and fixed. Specifically, the wire fixing portion 16fA in the 1 st divided spring portion 16A is formed with a through hole 16xA through which the upper end portion of the 1 st wire 8A is inserted and fixed. Similarly, a through hole 16xB through which the upper end portion of the 2 nd metal wire 8B is inserted and fixed is formed in the metal wire fixing portion 16fB in the 2 nd divided spring portion 16B, a through hole 16xC through which the upper end portion of the 3 rd metal wire 8C is inserted and fixed is formed in the metal wire fixing portion 16fC in the 3 rd divided spring portion 16C, and a through hole 16xD through which the upper end portion of the 4 th metal wire 8D is inserted and fixed is formed in the metal wire fixing portion 16fD in the 4 th divided spring portion 16D. In the present embodiment, the upper end portion of the wire 8 and the wire fixing portion 16f are joined by solder.

As shown in fig. 5, the 1 st to 4 th divided spring portions 16A to 16D have substantially the same shape. That is, as shown in fig. 5, the upper plate spring 16 is arranged four times rotationally symmetrical with respect to the optical axis JD. Therefore, this configuration can reduce the number of components of the lens driving device 101. Further, the upper plate spring 16 can support the lens holding member 2 in the air with good balance. The upper leaf spring 16 does not adversely affect the weight balance of the movable-side member MB supported by the 4 wires 8 (the 1 st wire 8A to the 4 th wire 8D).

As shown in fig. 4, the lower leaf spring 26 is configured such that its inner shape is substantially circular. The lower plate spring 26 includes an inner portion 26i as a1 st support portion fixed to the lens holding member 2 by an adhesive, 4 outer portions 26e as a2 nd support portion fixed to the magnet holding member MH, and 4 elastic arm portions 26g located between the inner portion 26i and each of the 4 outer portions 26 e.

Next, details of the movable member MB will be described with reference to fig. 6(a), 6(B) to 14. Fig. 6(a) is a front view of the lens holding member 2, and fig. 6(B) is a rear view of the lens holding member 2. Fig. 7(a) is a right side view of the lens holding member 2, and fig. 7(B) is a left side view of the lens holding member 2. Fig. 8(a) is a plan view of the lens holding member 2, and fig. 8(B) is a bottom view of the lens holding member 2 and the housing 4. Fig. 9(a) is a perspective view of the lens holding member 2 viewed from the front side, and fig. 9(B) is a perspective view of the lens holding member 2 viewed from the back side. Fig. 10(a) is a plan view of the lens holding member 2 to which the upper plate spring 16 is attached, and fig. 10(B) is a bottom view of the lens holding member 2 to which the lower plate spring 26 is attached. Fig. 11(a) is a plan view of the magnet holding member MH, and fig. 11(B) is a plan view of the magnet holding member MH to which the upper leaf spring 16 is attached. Fig. 12(a) is a bottom view of the magnet holding member MH, and fig. 12(B) is a bottom view of the magnet holding member MH to which the lower leaf spring 26 is attached. Fig. 13(a) is a perspective view of the lens holding member 2 to which the moving coil 3 and the magnetic detection member 11 are attached, as viewed from the front side, and fig. 13(B) is a perspective view of the lens holding member 2 to which the moving coil 3 and the magnetic detection member 11 are attached, as viewed from the back side. Fig. 14 is a plan view of the lens holding member 2 and the magnet holding member MH.

The lens holding member 2 is formed by injection molding a synthetic resin such as a Liquid Crystal Polymer (LCP). Specifically, as shown in fig. 9a and 9B, the lens holding member 2 includes a cylindrical portion 12 formed to extend along the optical axis JD, and a flange portion (flange portion) 52 projecting radially outward from the outer peripheral surface of the cylindrical portion 12. In the present embodiment, the lens body is fixed to the inner circumferential surface of the cylindrical portion 12 with an adhesive. Therefore, no thread groove is formed on the inner peripheral surface of the cylindrical portion 12. However, a screw groove may be provided on the inner peripheral surface of the cylindrical portion 12 to screw the lens body. In addition, as shown in fig. 8(a), the lens holding member 2 is provided with an upper base 12d on the end surface on the object side, and as shown in fig. 8(B), an annular lower base 12B on the end surface on the image pickup device side. The upper mount 12d includes the 1 st upper mount 12d1 to the 4 th upper mount 12d 4. As shown in fig. 10(a), the inner portion 16i of the upper leaf spring 16 is placed on the upper seat 12 d. Specifically, the inner portion 16iA of the 1 st divided spring 16A is placed and fixed on the 1 st upper seat 12D1, the inner portion 16iB of the 2 nd divided spring 16B is placed and fixed on the 2 nd upper seat 12D2, the inner portion 16iC of the 3 rd divided spring 16C is placed and fixed on the 3 rd upper seat 12D3, and the inner portion 16iD of the 4 th divided spring 16D is placed and fixed on the 4 th upper seat 12D 4. As shown in fig. 10(B), an inner portion 26i of the lower leaf spring 26 is placed on the lower base 12B. In the present embodiment, the inner portion 26i of the lower leaf spring 26 is fixed to the lower base 12b by an adhesive.

In the present embodiment, as shown in fig. 9(a) and 9(B), the flange portion 52 includes an upper flange portion 52U and a lower flange portion 52L. The upper flange 52U is located closer to the object than the lower flange 52L, and protrudes radially outward than the lower flange 52L. A portion of the lower surface LS of the upper flange portion 52U constitutes a step portion ST between the upper flange portion 52U and the lower flange portion 52L.

As shown in fig. 8(a), the upper flange portion 52U has a substantially octagonal ring-shaped outline in plan view, and includes 8 side portions SF. The 8 side portions SF include the 1 st side portion SF1 to the 8 th side portion SF 8.

Specifically, as shown in fig. 8(B), the upper flange portion 52U has 8 side portions, and the 8 side portions are constituted by 4 side portions corresponding to the 4 side plate portions of the housing 4, respectively, and the other 4 side portions arranged between the adjacent two side portions of the 4 side portions, respectively. The 4 side portions constitute the 1 st side portion group, and the other 4 side portions constitute the 2 nd side portion group.

In the present embodiment, as shown in fig. 8(B), the upper flange portion 52U includes, as a1 st side group, a2 nd side portion SF2 extending parallel to the 1 st side plate portion 4a1, an 8 th side portion SF8 extending parallel to the 2 nd side plate portion 4a2, a 6 th side portion SF6 extending parallel to the 3 rd side plate portion 4A3, and a4 th side portion SF4 extending parallel to the 4 th side plate portion 4a 4. The upper flange 52U includes, as a2 nd side group, a1 st side SF1 disposed between the 2 nd side SF2 and the 8 th side SF8, a 7 th side SF7 disposed between the 8 th side SF8 and the 6 th side SF6, a 5 th side SF5 disposed between the 6 th side SF6 and the 4 th side SF4, and a3 rd side SF3 disposed between the 4 th side SF4 and the 2 nd side SF 2. As shown in fig. 9(a), the magnetic detection member 11 has 1 st to 6 th terminals TR1 to TR6, and is disposed at the 1 st side SF1 as one of the 2 nd side group as shown in fig. 10 (a). In the present embodiment, the magnetic detection member 11 is attached to the 1 st side portion SF1 with an adhesive. The magnetic detection member 11 may be attached to the 1 st side portion SF1 by resin. The magnetic detection member 11 may be sealed with a sealing material.

As shown in fig. 8(B), the lower flange portion 52L has a substantially octagonal ring-shaped outline in a bottom view.

A pattern forming surface on which a plurality of conductive patterns CP are formed and a coil arrangement surface on which the moving coil 3 is arranged are provided on the outer periphery of the lens holding member 2 (flange portion 52).

In the present embodiment, as shown in fig. 9(a) and 9(B), a pattern forming surface 52US on which a plurality of conductive patterns CP are formed is provided on the outer periphery of the upper flange portion 52U, and a coil arrangement surface 52LS on which the moving coil 3 is arranged is provided on the outer periphery of the lower flange portion 52L. In the present embodiment, the conductive pattern CP is formed on the 1 st to 3 rd side portions SF1 to SF3 and the 5 th to 8 th side portions SF5 to SF8, respectively, but as shown in fig. 9(B), the conductive pattern CP may not be formed on the 4 th side portion SF 4.

The coil disposition surface 52LS is disposed on the base member 18 side (lower side) than the pattern formation surface 52 US. Further, a step ST is formed between the coil arrangement surface 52LS and the pattern forming surface 52 US. As shown in fig. 13 a and 13B, the upper end of the moving coil 3 (winding portion 13) faces the step ST (lower surface LS of the upper flange portion 52U) in a state where at least a part of the upper end abuts against the step ST. In the present embodiment, the conductive pattern CP is not formed on the coil arrangement surface 52LS except for a portion (a portion of the 1 st side portion SF1) where the pattern formation surface 52US also functions as the coil arrangement surface 52 LS.

The conductive pattern CP is a wiring formed on the surface of the lens holding member 2. The conductive pattern CP may also be gold-plated on the outermost layer. In the present embodiment, the three-dimensional wiring formed three-dimensionally on the surface of the lens holding member 2 includes the 1 st conductive pattern CP1 to the 6 th conductive pattern CP6 as shown in fig. 6(a), 6(B) to 9(a) and 9 (B).

The 1 st conductive pattern CP1 is a conductive pattern that connects the 1 st connection FC1 (see fig. 6 a) formed in the 1 st side SF1 to the 7 th connection FC7 (see fig. 8 a) formed on the upper surface of the lens holding member 2.

The 2 nd conductive pattern CP2 is a conductive pattern that connects the 2 nd connection part FC2 (see fig. 6 a) formed in the 1 st side part SF1 to the 8 th connection part FC8 (see fig. 8 a) formed on the upper surface of the lens holding member 2.

The 3 rd conductive pattern CP3 is a conductive pattern that connects the 3 rd connection portion FC3 (see fig. 6 a) formed in the 1 st side portion SF1 to the 9 th connection portion FC9 (see fig. 8 a) formed on the upper surface of the lens holding member 2.

The 4 th conductive pattern CP4 is a conductive pattern that connects the 4 th connection part FC4 (see fig. 6 a) formed in the 1 st side SF1 to the 10 th connection part FC10 (see fig. 8 a) formed on the upper surface of the lens holding member 2.

The 5 th conductive pattern CP5 is a conductive pattern connecting the 5 th connection part FC5 (see fig. 6 a) formed at the 1 st side SF1 and the 11 th connection part FC11 (see fig. 6B) formed at the 3 rd side SF 3.

The 6 th conductive pattern CP6 is a conductive pattern connecting the 6 th connection part FC6 (see fig. 6 a) formed at the 1 st side SF1 and the 12 th connection part FC12 (see fig. 6B) formed at the 5 th side SF 5.

The 1 st to 6 th connectors FC1 to FC6 correspond to the 1 st to 6 th terminals TR6 (see fig. 9 a) of the magnetic detection member 11, and are also referred to as terminal-side connectors (terminal-side solder portions). Further, the 7 th to 10 th connecting portions FC7 to FC10 are formed on the upper surface of the lens holding member 2, and are therefore also referred to as upper surface connecting portions (upper surface pad portions). In addition, the 11 th connection portion FC11 and the 12 th connection portion FC12 are formed at the side portion SF of the upper flange portion 52U, and are therefore also referred to as side connection portions (side pad portions).

In the present embodiment, the 1 st conductive pattern CP1 to the 4 th conductive pattern CP4 constitute a1 st conductive pattern group for power supply and input. Specifically, the 1 st conductive pattern CP1 is a conductive pattern for the ground Voltage (VSS), and the 2 nd conductive pattern CP2 is a conductive pattern for the power supply Voltage (VDD). In addition, the 3 rd conductive pattern CP3 is a conductive pattern for a clock Signal (SCL), and the 4 th conductive pattern CP4 is a conductive pattern for a data Signal (SDA). The data signal contains information on the magnitude and orientation of the current flowing in the moving coil 3, for example.

Further, the 5 th conductive pattern CP5 and the 6 th conductive pattern CP6 constitute a2 nd conductive pattern group for current supply. Specifically, the 5 th conductive pattern CP5 and the 6 th conductive pattern CP6 are conductive patterns for supplying current to the moving coil 3.

The magnetic detection means 11 can control the magnitude and direction of the current flowing in the moving coil 3 based on the received data signal. Specifically, the magnetic detection member 11 can control the magnitude of the current flowing in the 1 st path from the 5 th terminal TR5 to the 6 th terminal TR6 via the 5 th conductive pattern CP5, the movable coil 3, and the 6 th conductive pattern CP6, or the magnitude of the current flowing in the 2 nd path from the 6 th terminal TR6 to the 5 th terminal TR5 via the 6 th conductive pattern CP6, the movable coil 3, and the 5 th conductive pattern CP 5. Further, the magnetic detection member 11 can control in which of the 1 st path or the 2 nd path the current flows.

As shown in fig. 9(a), the 1 st connecting portion FC1 is connected to the 1 st terminal TR1 of the magnetic detection member 11. Similarly, the 2 nd connector FC2 is connected to the 2 nd terminal TR2, the 3 rd connector FC3 is connected to the 3 rd terminal TR3, the 4 th connector FC4 is connected to the 4 th terminal TR4, the 5 th connector FC5 is connected to the 5 th terminal TR5, and the 6 th connector FC6 is connected to the 6 th terminal TR 6. In the present embodiment, the 1 st connection part FC1 is connected to the 1 st terminal TR1 by soldering. However, the 1 st connector FC1 may be connected to the 1 st terminal TR1 by a conductive adhesive. The same applies to the 2 nd to 6 th junctions FC2 to FC 6.

As shown in fig. 6a, 6B to 9a, and 9B, the lens holding member 2 includes 4 protruding portions PT that protrude radially outward from the end surface on the object side (Z1 side) and protrude upward (Z1 direction). The projection PT includes 1 st projection PT1 to 4 th projection PT 4.

The projecting portion PT restricts excessive upward movement of the lens holding member 2, and therefore, is configured to contact the back surface (surface on the Z2 side) of the top plate portion 4B of the housing 4 when the lens holding member 2 moves upward by a predetermined distance. Further, the projecting portion PT restricts excessive downward and radial outward movement of the lens holding member 2, and is configured to contact the magnet holding member MH when the lens holding member 2 moves downward or radial outward by a predetermined distance. That is, the projection PT functions as a mechanical stopper for restricting excessive movement of the lens holding member 2.

As shown in fig. 13B, the winding start side end 33A of the wire 33 constituting the movable coil 3 is electrically connectable to an 11 th connector FC11 formed in the 3 rd side portion SF3 of the lens holding member 2 by solder, conductive adhesive, or the like (not shown). Similarly, as shown in fig. 13B, the end 33B of the wire 33 on the winding end side is electrically connectable to a 12 th connector FC12 formed in the 5 th side portion SF5 of the lens holding member 2 by solder, conductive adhesive, or the like (not shown). Each of the 3 rd side SF3 and the 5 th side SF5 faces a corner of the magnet holding member MH. Further, the 3 rd side portion SF3 and the 5 th side portion SF5 are arranged so as to sandwich the 4 th side portion SF4 where no conductive pattern is formed.

As shown in fig. 3, in a state where the lens holding member 2 and the magnet holding member MH are connected by the plate spring 6, the plate spring 6 supports the lens holding member 2 so that the lens holding member 2 can move relative to the magnet holding member MH along the optical axis JD.

The upper plate spring 16 also functions as a conductive member for conducting the 1 st terminal TR1 to the 4 th terminal TR4 of the magnetic detection member 11. On the other hand, the lower plate spring 26 is made of a non-conductive material because no current flows therein.

As shown in fig. 7(a), 9(a) and 13(B), an end 33A of the wire 33 constituting the movable coil 3 on the winding start side is electrically connectable to the 5 th terminal TR5 of the magnetic detection member 11 via the 11 th connection part FC11, the 5 th conductive pattern CP5 and the 5 th connection part FC 5. As shown in fig. 7(B), 9(a) and 13(B), the winding end side end 33B of the wire rod 33 constituting the moving coil 3 is electrically connectable to the 6 th terminal TR6 of the magnetic detection member 11 via the 12 th connection part FC12, the 6 th conductive pattern CP6 and the 6 th connection part FC 6.

As shown in fig. 3, 8A, 9a and 10 a, the 1 st terminal TR1 of the magnetic detection member 11 is electrically connectable to an external ground circuit (ground pattern) via the 1 st connection part FC1, the 1 st conductive pattern CP1, the 7 th connection part FC7, the 1 st divided spring part 16A (the inner part 16iA, the elastic arm part 16gA, the outer part 16eA, the connection part 16hA and the wire fixing part 16fA) and the 1 st wire 8A.

As shown in fig. 3, 8a, 9a and 10 a, the 2 nd terminal TR2 of the magnetic detection member 11 is electrically connectable to an external voltage source via the 2 nd connector FC2, the 2 nd conductive pattern CP2, the 8 th connector FC8, and the 2 nd divided spring portion 16B (the inner portion 16iB, the elastic arm portion 16gB, the outer portion 16eB, the connection portion 16hB and the wire fixing portion 16fB) and the 2 nd wire 8B.

As shown in fig. 3, 8a, 9a and 10 a, the 3 rd terminal TR3 of the magnetic detection member 11 is electrically connectable to an external signal source (control circuit) via the 3 rd connection part FC3, the 3 rd conductive pattern CP3, the 9 th connection part FC9, and the 3 rd divided spring part 16C (the inner part 16iC, the elastic arm part 16gC, the outer part 16eC, the connection part 16hC, and the wire fixing part 16FC) and the 3 rd wire 8C.

As shown in fig. 3, 8a, 9a and 10 a, the 4 th terminal TR4 of the magnetic detection member 11 is electrically connectable to an external signal source (control circuit) via the 4 th connection part FC4, the 4 th conductive pattern CP4, the 10 th connection part FC10, and the 4 th divided spring part 16D (the inner part 16iD, the elastic arm part 16gD, the outer part 16eD, the connection part 16hD, and the wire fixing part 16fD) and the 4 th wire 8D.

Here, the details of the inner portion 16i of the upper leaf spring 16 will be described with reference to fig. 10 (a).

The inner portion 16iA of the 1 st divided spring portion 16A has a fixing portion FP fixed to the lens holding member 2, a bent portion BP bent in a U-shape or a C-shape to expose a 7 th connecting portion FC7 connected to the 1 st conductive pattern CP1, a1 st extension portion EP1 extended from the fixing portion FP, and a2 nd extension portion EP2 extended from the bent portion BP.

Further, the inner side portion 16iB of the 2 nd division spring portion 16B has a fixing portion FP fixed to the lens holding member 2, a bent portion BP bent in a U-shape or a C-shape to expose the 8 th connection portion FC8 connected to the 2 nd conductive pattern CP2, a1 st extension portion EP1 extended from the fixing portion FP, and a2 nd extension portion EP2 extended from the bent portion BP.

Further, the inner portion 16iC of the 3 rd divided spring portion 16C has a fixing portion FP fixed to the lens holding member 2, a bent portion BP bent in a U-shape or a C-shape to expose the 9 th connection portion FC9 connected to the 3 rd conductive pattern CP3, a1 st extension portion EP1 extended from the fixing portion FP, and a2 nd extension portion EP2 extended from the bent portion BP.

Further, the inner side portion 16iD of the 4 th divided spring portion 16D has a fixing portion FP fixed to the lens holding member 2, a bent portion BP bent in a U-shape or a C-shape to expose the 10 th connection portion FC10 connected to the 4 th conductive pattern CP4, and a1 st extension portion EP1 extended from the fixing portion FP. In the present embodiment, the 2 nd extension portion is omitted from the inner portion 16iD of the 4 th divided spring portion 16D.

When the upper plate spring 16 is assembled to the lens driving device 101, the fixing portion FP of the inner portion 16i is placed on the upper mount 12d of the lens holding member 2. The inner portion 16i is fixed to the upper surface (surface on the Z1 side) of the lens holding member 2. In a state where the position of the recess RS1 (see fig. 8 a) formed in the end surface of the object side (Z1 side) of the upper base 12d matches the position of the through hole AH1 (see fig. 10 a) formed in the fixing portion FP of the inner portion 16i, an adhesive (not shown) is applied to the recess RS1, thereby fixing the fixing portion FP.

The 1 st extension portion EP1 of the inner portion 16i is placed on the upper stage 12 d. The 1 st extension setting portion EP1 is utilized when the inner portion 16i is pressed on the lens holding member 2 by a jig.

The 2 nd extension portion EP2 of the inner portion 16i is placed on the upper protruding portion RP (see fig. 8 a). The 2 nd extension portion EP2 is used when the inner portion 16i is pressed against the lens holding member 2 by a jig, similarly to the 1 st extension portion EP 1. As shown in fig. 8a, the upper protruding portion RP protrudes upward (in the Z1 direction) from the end surface of the lens holding member 2 on the object side (Z1 side). The end surface of the upper protruding portion RP is flush with the end surface of the upper pedestal portion 12 d. The upper protruding portion RP includes 1 st to 3 rd upper protruding portions RP1 to RP 3.

Specifically, as shown in fig. 10(a), the 2 nd extension EP2 of the inner portion 16iA of the 1 st divided spring 16A is placed on the 1 st upper protrusion RP1, the 2 nd extension EP2 of the inner portion 16iB of the 2 nd divided spring 16B is placed on the 2 nd upper protrusion RP2, and the 2 nd extension EP2 of the inner portion 16iC of the 3 rd divided spring 16C is placed on the 3 rd upper protrusion RP 3.

The bent portion BP of the inner portion 16i is positioned on the upper surface connection portion in such a manner as to partially cover the edge portion of the upper surface connection portion connected to the conductive pattern CP and expose the central portion of the upper surface connection portion. In the present embodiment, the bent portion BP is configured not to directly contact the upper surface connecting portion. That is, the end surface of the upper pedestal portion 12d and the end surface of the upper protruding portion RP are configured to be higher than the surface on which the upper surface connecting portion is formed. However, the bent portion BP may be configured to directly contact the upper surface connecting portion. That is, the end surface of the upper pedestal portion 12d, the end surface of the upper protruding portion RP, and the surface forming the upper surface connecting portion may be located on the same plane.

The upper surface connecting portion and the bent portion BP are connected by a conductive bonding material. In the present embodiment, the bonding material is solder (not shown). However, the bonding material may be a conductive adhesive. Specifically, the bent portion BP of the inner portion 16iA of the 1 st divided spring portion 16A is connected to the 7 th connection portion FC7 connected to the 1 st conductive pattern CP1 by solder. Further, the bent portion BP of the inner portion 16iB of the 2 nd division spring portion 16B is connected to the 8 th connection portion FC8 connected to the 2 nd conductive pattern CP2 by solder. Further, the bent portion BP of the inner portion 16iC of the 3 rd divided spring portion 16C is connected to the 9 th connection portion FC9 connected to the 3 rd conductive pattern CP3 by solder. Further, the bent portion BP of the inner portion 16iD of the 4 th divided spring portion 16D is connected to the 10 th connection portion FC10 connected to the 4 th conductive pattern CP4 by solder.

As shown in fig. 11B, the outer portion 16e of the upper leaf spring 16 is fixed to the upper surface (surface on the Z1 side) of the magnet holding member MH. The outer portion 16e is fixed by an adhesive applied to the magnet holding member MH. Specifically, the outer portion 16e is fixed by applying an adhesive (not shown) to the recessed portion RS2 in a state where the position of the recessed portion RS2 (see fig. 11 a) formed in the end surface of the magnet holding member MH on the subject side (Z1 side) coincides with the position of the through hole AH2 (see fig. 11B) formed in the outer portion 16 e.

As shown in fig. 12B, the outer portion 26e of the lower leaf spring 26 is fixed to the lower surface (surface on the Z2 side) of the magnet holding member MH. The outer portion 26e is fixed by performing hot caulking or cold caulking on 4 circular convex protrusions PR (see fig. 12 a) protruding downward (Z2 direction) from the end surface on the imaging element side (Z2 side) of the magnet holding member MH. Specifically, as shown in fig. 12(B), the protrusion PR is inserted into a through hole AH3 formed in the outer portion 26e of the lower leaf spring 26 and caulked. As a result, the outer portion 26e of the lower leaf spring 26 is fixed to the magnet holding member MH. However, the outer portion 26e of the lower leaf spring 26 may be fixed to the lower surface (surface on the Z2 side) of the magnet holding member MH by an adhesive.

Next, the positional relationship among the lens holding member 2, the detection magnet 10, the magnetic detection member 11, the vibration damping material DP, and the magnet holding member MH will be described with reference to fig. 14.

The vibration damping material DP is disposed between the lens holding member 2 and the magnet holding member MH, and is a member for suppressing vibration of the lens holding member 2 with respect to the magnet holding member MH, and is also referred to as a damping material. In the present embodiment, the damping material DP is formed of a gel-like material, and includes the 1 st damping material DP1 to the 4 th damping material DP 4.

The 1 st vibration damping material DP1 is disposed between the magnetic detection member 11 attached to the 1 st side portion SF1 of the lens holding member 2 and the detection magnet 10 attached to the 1 st inner wall WP1 at the corner of the magnet holding member MH. The detection magnet 10 is fitted into a recess RS3 (see fig. 11 a) formed in the 1 st inner wall WP1 and fixed by an adhesive.

Similarly, the 2 nd vibration damping material DP2 is disposed between the 3 rd side portion SF3 of the lens holding member 2 and the 2 nd inner wall WP2 at the corner of the magnet holding member MH. The 3 rd vibration damping material DP3 is disposed between the 5 th side SF5 of the lens holding member 2 and the 3 rd inner wall WP3 at the corner of the magnet holding member MH. The 4 th vibration damping material DP4 is disposed between the 7 th side SF7 of the lens holding member 2 and the 4 th inner wall WP4 at the corner of the magnet holding member MH.

The 1 st side SF1 to which the magnetic sensing member 11 is attached is arranged closer to the optical axis JD than the other 3 sides (the 3 rd side SF3, the 5 th side SF5, and the 7 th side SF7) constituting the 2 nd side group. Specifically, a distance R1 between the optical axis JD and the 1 st side SF1 is smaller than any of a distance R2 between the optical axis JD and the 3 rd side SF3, a distance R3 between the optical axis JD and the 5 th side SF5, and a distance R4 between the optical axis JD and the 7 th side SF 7. In the present embodiment, the distance R2, the distance R3, and the distance R4 are the same size. The distance R5 is a distance between the inner wall WP of the corner of the magnet holding member MH and the optical axis JD.

This structure is for making the total of the thickness D1 and the distance R1 of the magnetic sensing element 11 in the radial direction substantially equal to the distance R2. That is, this configuration is for making the gap (distance R5 — distance R2) between the inner wall WP and each of the 3 rd side portion SF3, the 5 th side portion SF5, and the 7 th side portion SF7 substantially equal to the gap (distance R5-distance R1-thickness D1) between the magnetic detection member 11 attached to the 1 st side portion SF1 and the inner wall WP or the detection magnet 10 attached to the inner wall WP.

With this configuration, the 1 st vibration damping material DP1 is attached to the lens drive device 101 so that the thickness D2 thereof is substantially equal to the thicknesses of the 2 nd to 4 th vibration damping materials DP2 to DP 4. That is, in this configuration, by disposing 4 vibration dampers DP having substantially the same thickness between each of the inner walls WP at the 4 corners of the magnet holding member MH and each of the 2 nd side group of the lens holding member 2, the vibration of the lens holding member 2 can be suppressed with good balance.

Further, the dimension (width) in the circumferential direction of the 1 st side portion SF1 to which the magnetic sensing member 11 is attached is configured to be larger than the dimension (width) in the circumferential direction of the other 3 side portions (the 3 rd side portion SF3, the 5 th side portion SF5, and the 7 th side portion SF7) configuring the 2 nd side portion group. Specifically, the 1 st side SF1 is configured such that the width W1 thereof is larger than any one of the width W2 of the 3 rd side SF3, the width W3 of the 5 th side SF5 and the width W4 of the 7 th side SF 7. In the present embodiment, the width W2, the width W3, and the width W4 are the same size.

This configuration has the effect of increasing the surface area of the 1 st side portion SF 1. That is, this configuration has an effect of increasing the area that can be used when mounting the magnetic detection member 11. Further, this configuration can suppress or prevent the weight balance of the entire lens holding member 2 to which the magnetic detection member 11 is attached from being lost. This is because, in order to increase the surface area of the 1 st side portion SF1, a portion of the lens holding member 2 which is cut out is removed from the lens holding member 2 by a portion corresponding to the weight of the magnetic detection member 11.

Next, details of the wire 8, the coil substrate 17, and the base member 18, which are part of the fixed-side member RG, will be described with reference to fig. 15 and 16. Fig. 15 is a perspective view of the metal wire 8, the coil substrate 17, and the base member 18. Fig. 16 is a perspective view of the terminal member 7 and the upper leaf spring 16.

The base member 18 is formed by injection molding using a synthetic resin such as a liquid crystal polymer. In the present embodiment, as shown in fig. 15, the base member 18 has a rectangular outline in a plan view, and has an opening 18k at the center. The coil substrate 17 is fixed to the upper surface of the base member 18 on the object side (the surface on the Z1 side) by an adhesive.

As shown in fig. 15, the coil substrate 17 is a multilayer substrate mounted on the base member 18, and can fix the coil 9 to the outside. The coil substrate 17 includes not-shown structures such as a wiring pattern in addition to the fixed coil 9.

The terminal member 7 shown in fig. 16 and formed of a metal plate made of a material such as copper, iron, or an alloy containing these as a main component is embedded in the base member 18 by insert molding. In the present embodiment, the terminal member 7 includes the 1 st terminal T1 to the 8 th terminal T8 exposed to the side surfaces (surfaces on the X1 side and the X2 side) of the base member 18, and the 1 st conductive portion P1 to the 4 th conductive portion P4 exposed to the upper surface (surface on the Z1 side) of the base member 18. Specifically, the terminal member 7 includes the 1 st to 8 th terminal members 7A to 7H. The 1 st terminal member 7A includes a1 st terminal T1. The 2 nd terminal part 7B includes a2 nd terminal T2. The 3 rd terminal part 7C includes a3 rd terminal T3. The 4 th terminal part 7D includes a4 th terminal T4. The 5 th terminal member 7E includes a1 st conductive part P1 and a 5 th terminal T5. The 6 th terminal member 7F includes a2 nd conductive part P2 and a 6 th terminal T6. The 7 th terminal member 7G includes a3 rd conductive part P3 and a 7 th terminal T7. The 8 th terminal member 7H includes a4 th conductive part P4 and an 8 th terminal T8.

The 1 st fixed coil 9A is connected in series with the 3 rd fixed coil 9C, and the 2 nd fixed coil 9B is connected in series with the 4 th fixed coil 9D. In the present embodiment, one end of the 1 st fixed coil 9A is connected to the 1 st conductive part P1, the other end of the 1 st fixed coil 9A is connected to one end of the 3 rd fixed coil 9C, and the other end of the 3 rd fixed coil 9C is connected to the 3 rd conductive part P3. One end of the 2 nd fixed coil 9B is connected to the 2 nd conductive part P2, the other end of the 2 nd fixed coil 9B is connected to one end of the 4 th fixed coil 9D, and the other end of the 4 th fixed coil 9D is connected to the 4 th conductive part P4. However, if the 1 st fixed coil 9A is connected in series with the 3 rd fixed coil 9C and the 2 nd fixed coil 9B is connected in series with the 4 th fixed coil 9D, the 1 st to 4 th fixed coils 9A to 9D and the 1 st to 4 th conductive parts P1 to P4 may be connected in an arbitrary order.

According to the above configuration, the power supply voltage is applied to the magnetic detection member 11 that supplies current to the moving coil 3 constituting the axial drive mechanism MK via the terminal member 7. Specifically, the power supply Voltage (VDD) is applied to the 2 nd terminal TR2 of the magnetic detection element 11 via the 2 nd terminal T2 (see fig. 16), the 2 nd wire 8B of the terminal member 7, the wire fixing portion 16fB of the 2 nd divided spring portion 16B, the inner portion 16iB, the 8 th connection portion FC8 (see fig. 10 a), the 2 nd conductive pattern CP2, and the 2 nd connection portion FC2 (see fig. 9 a). The 1 st terminal TR1 of the magnetic detection member 11 is set to the ground Voltage (VSS) via the 1 st connection portion FC1, the 1 st conductive pattern CP1, the 7 th connection portion FC7 (see fig. 10 a.), the inner portion 16iA of the 1 st divided spring portion 16A, the wire fixing portion 16fA, the 1 st wire 8A (see fig. 16), and the 1 st terminal T1 of the terminal member 7. The magnetic detection member 11 can flow a current not only from the 5 th connector FC5 to the 6 th connector FC6 via the moving coil 3 but also from the 6 th connector FC6 to the 5 th connector FC5 via the moving coil 3 by the current supply function.

The clock signal relating to the axial drive mechanism MK is transmitted from the 3 rd terminal T3 (see fig. 16) of the terminal member 7 to the magnetic detection member 11 via the 3 rd wire 8C, the wire fixing portion 16fC of the 3 rd divided spring portion 16C, the inner portion 16iC, the 9 th connection portion fC9 (see fig. 10 a.), the 3 rd conductive pattern CP3, and the 3 rd connection portion fC3 (see fig. 9 a).

The data signal relating to the axial drive mechanism MK is transmitted from the 4 th terminal T4 (see fig. 16) of the terminal member 7 to the magnetic detection element 11 via the 4 th wire 8D, the wire fixing portion 16fD of the 4 th divided spring portion 16D, the inner portion 16iD, the 10 th connection portion FC10 (see fig. 10 a.), the 4 th conductive pattern CP4, and the 4 th connection portion FC4 (see fig. 9 a).

The current for the 1 st radial drive mechanism flows from the 5 th terminal T5 (see fig. 16) of the terminal member 7 through the 1 st conductive portion P1, the 1 st fixed coil 9A (see fig. 15), the 3 rd fixed coil 9C, and the 3 rd conductive portion P3 to the 7 th terminal T7 (see fig. 16) of the terminal member 7 or in the opposite direction.

The current for the 2 nd radial drive mechanism flows from the 6 th terminal T6 (see fig. 16) of the terminal member 7 through the 2 nd conductive portion P2, the 2 nd fixed coil 9B (see fig. 15), the 4 th fixed coil 9D, and the 4 th conductive portion P4 to the 8 th terminal T8 (see fig. 16) of the terminal member 7 or in the opposite direction.

The conductive portion and the fixed coil 9 are connected by a solder pad, a wiring pattern, and the like, not shown, formed on the coil substrate 17.

As described above, as shown in fig. 1 to 3, the lens driving device 101 includes: a movable-side member MB including a lens holding member 2 capable of holding a lens body and an axial driving mechanism MK as a1 st driving mechanism for moving the lens holding member 2 in the optical axis direction; a wire 8 that supports the movable-side member MB so as to be movable in a direction intersecting the optical axis direction; a radial drive mechanism RK as a2 nd drive mechanism for moving the movable-side member MB in a direction intersecting the optical axis direction; a housing 4 as a cover member having an outer peripheral wall portion 4A and a top plate portion 4B, and accommodating a movable member MB; and a base member 18 disposed on the opposite side of the top plate 4B with the movable member MB interposed therebetween, and constituting a housing together with the case 4.

As shown in fig. 4, the movable member MB includes: a movable coil 3 held on the outer surface of the lens holding member 2; a drive magnet 5 disposed outside the movable coil 3 and facing the movable coil 3; a magnet holding member MH for fixing the driving magnet 5; and an upper plate spring 16 and a lower plate spring 26 configured to couple the lens holding member 2 and the magnet holding member MH and to support the lens holding member 2 movably in the optical axis direction.

The upper plate spring 16 is divided into at least 4 divided spring portions including a1 st divided spring portion 16A, a2 nd divided spring portion 16B, a3 rd divided spring portion 16C, and a4 th divided spring portion 16D. The 1 st to 4 th divided spring portions 16A to 16D each include an inner portion 16i serving as a1 st support portion fixed to the lens holding member 2, an outer portion 16e serving as a2 nd support portion fixed to the magnet holding member MH, an elastic arm portion 16g provided between the inner portion 16i and the outer portion 16e, a wire fixing portion 16f located outside the outer portion 16e and connected to corresponding 1 upper end portion of the 4 wires 8, and a pair of connecting portions 16h provided to connect the outer portion 16e and the wire fixing portion 16 f.

Further, a plurality of conductive patterns including a1 st conductive pattern CP1, a2 nd conductive pattern CP2, a3 rd conductive pattern CP3, a4 th conductive pattern CP4, a 5 th conductive pattern CP5, and a 6 th conductive pattern CP6 are formed on the lens holding member 2.

Further, the lens driving device 101 has a magnetic detection unit MD for detecting the position of the lens holding member 2 in the optical axis direction. The magnetic detection unit MD includes a detection magnet 10 fixed to the magnet holding member MH, and a magnetic detection member 11 that detects the magnetic field of the detection magnet 10 and is fixed to the lens holding member 2 separately from the detection magnet 10. The magnetic detection member 11 has a function of detecting the magnetic field of the detection magnet 10 and a function of supplying a current to the movable coil 3, and is composed of an electronic member provided with 6 terminals. As shown in fig. 9(a) and 9(B), the 6 terminals include a1 st terminal TR1, a2 nd terminal TR2, a3 rd terminal TR3, a4 th terminal TR4, a 5 th terminal TR5, and a 6 th terminal TR 6.

The 1 st conductive pattern CP1 to the 4 th conductive pattern CP4 constitute a1 st conductive pattern group for power supply and input, and the 5 th conductive pattern CP5 and the 6 th conductive pattern CP6 constitute a2 nd conductive pattern group for current supply. The 1 st terminal TR1 to the 4 th terminal TR4 constitute a1 st terminal group for power supply and input, and the 5 th terminal TR5 and the 6 th terminal TR6 constitute a2 nd terminal group for current supply.

Also, the 1 st conductive pattern CP1 is connected to the 1 st terminal TR1 through a1 st connection FC1 (see fig. 9 a), and is connected to the inner portion 16iA of the 1 st divided spring portion 16A through a 7 th connection FC7 (see fig. 10 a). Further, the 2 nd conductive pattern CP2 is connected to the 2 nd terminal TR2 through a2 nd connection part FC2 (refer to fig. 9 (a)), and is connected to the inner part 16iB of the 2 nd division spring part 16B through an 8 th connection part FC8 (refer to fig. 10 (a)). Further, the 3 rd conductive pattern CP3 is connected to the 3 rd terminal TR3 through a3 rd connection FC3 (refer to fig. 9 (a)), and is connected to the inner portion 16iC of the 3 rd division spring part 16C through a 9 th connection FC9 (refer to fig. 10 (a)). Further, the 4 th conductive pattern CP4 is connected to the 4 th terminal TR4 through a4 th connection FC4 (refer to fig. 9 (a)), and is connected to the inner portion 16iD of the 4 th division spring portion 16D through a 10 th connection FC10 (refer to fig. 10 (a)). The 5 th conductive pattern CP5 is connected to the 5 th terminal TR5 via a 5 th connection portion FC5 (see fig. 9 a), and is connected to one end portion, i.e., the winding start side end portion 33A, of the wire rod 33 constituting the movable coil 3 via an 11 th connection portion FC11 (see fig. 13B). The 6 th conductive pattern CP6 is connected to the 6 th terminal FC6 through a 6 th connection portion FC6 (see fig. 9 a), and is connected to the other end portion, i.e., the winding end side end portion 33B, of the wire rod 33 constituting the movable coil 3 through a 12 th connection portion FC12 (see fig. 13B).

As described above, the lens driving device 101 is configured such that the magnetic detection means 11 can be provided to the lens holding member 2 with a smaller number of components. That is, the lens driving device 101 does not require a circuit board for mounting the magnetic detection member 11.

As shown in fig. 8B, the case 4 may be configured such that the top plate 4B has a substantially rectangular outline and the outer peripheral wall 4A has 4 side plates (the 1 st side plate 4A1 to the 4 th side plate 4A 4).

The lens holding member 2 may have 8 side portions SF including 4 side portions (a 2 nd side portion SF2, a4 th side portion SF4, a 6 th side portion SF6, and an 8 th side portion SF8) corresponding to the 4 side plate portions, and other 4 side portions (a 1 st side portion SF1, a3 rd side portion SF3, a 5 th side portion SF5, and a 7 th side portion SF7) respectively arranged between two adjacent side portions of the 4 side portions.

In this case, 4 sides (the 2 nd side SF2, the 4 th side SF4, the 6 th side SF6 and the 8 th side SF8) constitute the 1 st side group, and the other 4 sides (the 1 st side SF1, the 3 rd side SF3, the 5 th side SF5 and the 7 th side SF7) constitute the 2 nd side group.

The magnetic detection member 11 is preferably disposed on 1 of the other 4 sides. In the above embodiment, the magnetic detection member 11 is disposed at the 1 st side SF1 which is 1 side of the 2 nd side group. However, the magnetic detection member 11 may be disposed at the 3 rd side SF3, the 5 th side SF5, or the 7 th side SF7, which is 1 side of the 2 nd side group.

In this configuration, the magnetic detection member 11 is attached to a position corresponding to a corner of the housing 4, thereby improving space efficiency in the housing and suppressing an increase in size of the lens driving device 101.

The other 4 sides may be arranged such that 1 side is located at a smaller distance from the optical axis JD than the other 3 sides and has a larger circumferential dimension. Specifically, as shown in fig. 14, the 1 st side SF1 to which the magnetic detection member 11 is attached, which is 1 of the other 4 sides, may be located at a smaller distance from the optical axis JD and have a larger circumferential dimension than any of the 3 rd side SF3, the 5 th side SF5, and the 7 th side SF7, which are the other 3 sides.

This configuration has the effect of increasing the surface area of the 1 st side portion SF 1. That is, this configuration has an effect of increasing the area that can be used when mounting the magnetic detection member 11. Further, this configuration can suppress or prevent the weight balance of the entire lens holding member 2 to which the magnetic detection member 11 is attached from being lost.

As shown in fig. 14, a vibration damping material DP (1 st vibration damping material DP1) may be disposed between the magnetic detection member 11 and the detection magnet 10. In this configuration, the 1 st vibration damping material DP1 can be easily applied between the lens holding member 2 and the magnet holding member MH from the object side (Z1 side).

For example, as shown in fig. 6B, the 5 th and 6 th conductive patterns CP5 and CP6 may be connected to connection portions separately provided at the other 2 sides (the 3 rd and 5 th sides SF3 and SF5) among the other 4 sides (the 1 st side SF1, the 3 rd side SF3, the 5 th side SF5 and the 7 th side SF7) different from the 1 side (the 1 st side SF1) among the other 4 sides. Specifically, as shown in fig. 13(B), the 5 th conductive pattern CP5 may be connected to the 11 th connection FC11 provided in the 3 rd side SF3, and the 6 th conductive pattern CP6 may be connected to the 12 th connection FC12 provided in the 5 th side SF 5. As shown in fig. 13(B), the 11 th connection FC11 may be connected to the winding start side end 33A of the wire rod 33 constituting the moving coil 3, and the 12 th connection FC11 may be connected to the winding end side end 33B of the wire rod 33 constituting the moving coil 3.

This configuration can suppress an increase in size of the lens driving device 101, compared to a case where the 5 th conductive pattern CP5 and the 6 th conductive pattern CP6 are provided on the same side portion.

As shown in fig. 9(B), a pattern forming surface 52US on which a plurality of conductive patterns CP are formed and a coil arrangement surface 52LS on which the movable coil 3 is arranged may be provided on the outer periphery of the lens holding member 2. The coil arrangement surface 52LS may be arranged on the base member side (Z2 side) of the pattern formation surface 52 US. Further, a step ST may be formed between the coil arrangement surface 52LS and the pattern formation surface 52 US. The upper end of the moving coil 3 (the winding portion 13) may face the lower surface of the step ST in a state where at least a part of the upper end abuts against the lower surface of the step ST. With this configuration, the step ST can be used to position the moving coil 3.

As shown in fig. 10(a), the inner portion 16iA of the 1 st divided spring portion 16A may also have a fixing portion FP fixed to the lens holding member 2 and a bent portion BP bent so that the 7 th connection portion FC7 connected to the 1 st conductive pattern CP1 is exposed. The 7 th connection portion FC7 exposed to the inside of the bent portion BP and the bent portion BP may be connected by a conductive bonding material (not shown). In the present embodiment, the conductive bonding material is solder, but may be a conductive adhesive.

This configuration enables the connection between the inner portion 16i and the upper surface connection portions (the 7 th connection portion FC7 to the 10 th connection portion FC10) to be secured.

At least one of the inner side portions 16i may also have a2 nd extending portion EP2 extending from the bent portion BP. In the present embodiment, as shown in fig. 10(a), the inner portion 16iA, the inner portions 16iB, and 16iC each have a2 nd extending portion EP2 extending from the bent portion BP. On the other hand, the inside portion 16iD does not have the 2 nd extension set portion EP 2. This is because the upper protruding portion RP on which the 2 nd extension portion EP2 is mounted is not formed in the portion corresponding to the 1 st side portion SF 1. However, the inner portion 16iD may also have the 2 nd extension setting EP 2. That is, the upper leaf spring 16 may be configured such that all of the 4 inner portions 16i have the 2 nd extending portion EP 2. The lens holding member 2 may be configured to have 4 upper protruding portions RP so as to correspond to the 4 2 nd extending portions EP2, respectively.

When the inner portion 16i includes the 2 nd extension portion EP2, the bent portion BP is disposed between the fixing portion FP and the 2 nd extension portion EP2, and the fixing portion FP, the bent portion BP, and the 2 nd extension portion EP2 face the upper end surface of the lens holding member 2.

With this configuration, the operator can easily join the inner portion 16i (the bent portion BP) to the upper surface connecting portion. This is because the joining of the inner portion 16i (the bent portion BP) and the upper surface connecting portion is performed in a state where the 2 nd extension portion EP2 is pressed against the upper protruding portion RP (see fig. 8 a) by a jig or the like.

As shown in fig. 9a, the upper surface connections (the 7 th connection FC7 to the 10 th connection FC10) are formed on the upper end surface of the lens holding member 2. The upper surface connections (the 7 th to 10 th connections FC7 to FC10) are formed to correspond to the 1 st side group (the 2 nd, 4 th, 6 th, and 8 th sides SF2, SF4, SF6, and SF 8). Specifically, the 7 th link FC7 is formed to correspond to the 8 th side SF8, the 8 th link FC8 is formed to correspond to the 6 th side SF6, the 9 th link FC9 is formed to correspond to the 4 th side SF4, and the 10 th link FC10 is formed to correspond to the 2 nd side SF 2.

The method for manufacturing the lens driving device 101 according to the embodiment of the present invention includes: a step of mounting the magnetic detection member 11 on the lens holding member 2; a step of disposing the movable coil 3 on the lens holding member 2 on which the magnetic detection member 11 is mounted; and a step of soldering one end portion 33A of the wire 33 constituting the movable coil 3 disposed on the lens holding member 2, i.e., the winding start side end portion 33A, to the 5 th conductive pattern CP5, and soldering the other end portion of the wire 33, i.e., the winding end side end portion 33B, to the 6 th conductive pattern CP 6. Specifically, as shown in fig. 13(B), the winding start side end 33A is fixed by soldering to the 11 th connection part FC11 formed in the 3 rd side part SF3, and the winding end side end 33B is fixed by soldering to the 12 th connection part FC12 formed in the 5 th side part SF 5. Therefore, the operator can easily and reliably attach the moving coil 3 and the magnetic detection member 11 to the lens holding member 2. However, the magnetic detection member 11 may be mounted on the lens holding member 2 after the movable coil 3 is disposed on the lens holding member 2, or may be mounted after both ends of the wire 33 are soldered to the conductive patterns CP.

The method of manufacturing the lens driving device 101 includes a step of soldering the connection portion exposed to the inside of the bent portion BP and the bent portion BP in a state where the extension portion EP (see fig. 10 a) is pressed. Specifically, as shown in fig. 10(a), the method of manufacturing the lens driving device 101 includes a step of soldering the 7 th connection part FC7 exposed to the inside of the bend part BP and the bend part BP in a state where at least one of the 1 st extension part EP1 and the 2 nd extension part EP2 of the inner part 16iA of the 1 st divided spring part 16A is pressed against the upper surface of the lens holding member 2. The method of manufacturing the lens driving device 101 includes a step of soldering the 8 th connection part FC8 exposed to the inside of the bend BP and the bend BP in a state where at least one of the 1 st extension part EP1 and the 2 nd extension part EP2 of the inner part 16iB of the 2 nd divided spring part 16B is pressed against the upper surface of the lens holding member 2. The method of manufacturing the lens driving device 101 includes a step of soldering the 9 th connection part FC9 exposed to the inside of the bend BP and the bend BP in a state where at least one of the 1 st extension part EP1 and the 2 nd extension part EP2 of the inner part 16iC of the 3 rd divided spring part 16C is pressed against the upper surface of the lens holding member 2. The method of manufacturing the lens driving device 101 includes a step of soldering the 10 th connecting portion FC10 exposed to the inside of the bent portion BP and the bent portion BP in a state where the 1 st extension portion EP1 in the inner portion 16iD of the 4 th divided spring portion 16D is pressed against the upper surface of the lens holding member 2. Therefore, the operator can reliably realize the electrical connection between the movable coil 3 and the upper leaf spring 16 via the conductive pattern.

The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments. The above-described embodiments can be applied to various modifications, replacements, and the like without departing from the scope of the present invention. The features described with reference to the above embodiments may be combined as appropriate as long as they are not technically contradictory.

For example, in the lens driving device 101 described above, the lower end portions of the wires 8 are fixed to the terminal members 7 embedded in the base member 18. However, the lower end of the wire 8 may be fixed to the base member 18 made of synthetic resin, and may be electrically connected to the conductive pattern formed on the base member 18. Alternatively, the lower end of the wire 8 may be fixed by soldering or the like to a member such as a flexible printed board or a coil board laminated on the base member 18.

In the above-described embodiment, the bypass capacitor is not mounted on the lens holding member 2, but may be mounted on the lens holding member 2.

In the above-described embodiment, the base member 18 is configured to include the terminal member 7, but a conductor pattern may be formed on the surface instead of the terminal member 7.

In the above-described embodiment, the 2 nd magnetic detection means for detecting the movement of the movable-side member MB in the direction intersecting the optical axis direction is omitted, but the lens drive apparatus 101 may also include the 2 nd magnetic detection means. For example, the 2 nd magnetic detection member may be attached to the upper surface side of the base member 18. In this case, the base member 18 may also have a recess, an opening, or a notch for receiving the 2 nd magnetic detection member.

Claims (12)

1. A lens driving device is provided with:

a movable-side member including a lens holding member capable of holding the lens body and a1 st driving mechanism for moving the lens holding member in the optical axis direction;

4 wires that support the movable-side member so as to be movable in a direction intersecting the optical axis direction;

a2 nd driving mechanism for moving the movable-side member in a direction intersecting the optical axis direction;

a cover member having an outer peripheral wall portion and a top plate portion, and accommodating the movable-side member; and

a base member disposed on the opposite side of the top plate with the movable side member interposed therebetween and constituting a housing together with the cover member,

the movable-side member includes:

a coil held on an outer surface of the lens holding member;

a drive magnet disposed outside the coil and facing the coil;

a magnet holding member for fixing the driving magnet; and

an upper plate spring and a lower plate spring configured to connect the lens holding member and the magnet holding member and to support the lens holding member so as to be movable in an optical axis direction,

the above-described lens driving device is characterized in that,

the upper plate spring is divided into at least 4 divided spring portions including a1 st divided spring portion, a2 nd divided spring portion, a3 rd divided spring portion and a4 th divided spring portion,

the 1 st divided spring portion to the 4 th divided spring portion each include:

a1 st support part fixed to the lens holding member;

a2 nd support part fixed to the magnet holding member;

an elastic arm portion provided between the 1 st support portion and the 2 nd support portion;

a wire fixing portion located outside the 2 nd support portion and connected to upper end portions of 1 corresponding wire of the 4 wires; and

a connection part configured to connect the 2 nd support part and the wire fixing part,

the lens holding member is formed with a plurality of conductive patterns including a1 st conductive pattern, a2 nd conductive pattern, a3 rd conductive pattern, a4 th conductive pattern, a 5 th conductive pattern, and a 6 th conductive pattern,

the lens driving device includes a magnetic detection unit for detecting a position of the lens holding member in an optical axis direction,

the magnetic detection unit includes: a detection magnet fixed to the magnet holding member; and a magnetic detection member for detecting a magnetic field of the detection magnet and fixed to the lens holding member so as to be separated from the detection magnet,

the magnetic detection member has a function of detecting a magnetic field of the detection magnet and a function of supplying a current to the coil, and is composed of an electronic member provided with 6 terminals including a1 st terminal, a2 nd terminal, a3 rd terminal, a4 th terminal, a 5 th terminal, and a 6 th terminal,

the 1 st conductive pattern is connected to the 1 st terminal and to the 1 st supporting portion of the 1 st divided spring portion,

the 2 nd conductive pattern is connected to the 2 nd terminal and to the 1 st supporting portion of the 2 nd divided spring portion,

the 3 rd conductive pattern is connected to the 3 rd terminal and to the 1 st supporting portion of the 3 rd divided spring portion,

the 4 th conductive pattern is connected to the 4 th terminal and to the 1 st supporting portion of the 4 th divided spring portion,

the 5 th conductive pattern is connected to the 5 th terminal and to one end of a wire rod constituting the coil,

the 6 th conductive pattern is connected to the 6 th terminal and to the other end of the wire rod constituting the coil.

2. The lens driving device according to claim 1,

the cover member is configured such that the top plate is formed in a substantially rectangular shape, and the outer peripheral wall has 4 side plates,

the lens holding member has 8 side portions each including 4 side portions corresponding to the 4 side plate portions and 4 other side portions respectively arranged between adjacent 2 side portions of the 4 side portions,

the 4 side portions constitute a1 st side portion group, the other 4 side portions constitute a2 nd side portion group,

the magnetic detection member is disposed on 1 side portion of the other 4 side portions.

3. The lens driving device according to claim 2,

1 of the other 4 side portions has a smaller distance from the optical axis and a larger circumferential dimension than the other 3 side portions of the other 4 side portions.

4. The lens driving device according to claim 2,

a vibration damping material is disposed between the magnetic detection member and the detection magnet.

5. The lens driving device according to any one of claims 2 to 4,

the 5 th conductive pattern and the 6 th conductive pattern are connected to connection portions separately provided to the other 2 side portions of the other 4 side portions different from the 1 side portion of the other 4 side portions, respectively.

6. The lens driving device according to any one of claims 1 to 4,

a pattern forming surface on which the plurality of conductive patterns are formed and a coil disposing surface on which the coil is disposed are provided on an outer periphery of the lens holding member,

the coil disposition surface is disposed on the base member side of the pattern formation surface,

a step portion is formed between the coil disposition surface and the pattern formation surface,

the upper end portion of the coil faces the lower surface of the stepped portion in a state where at least a part of the upper end portion is in contact with the lower surface of the stepped portion.

7. The lens driving device according to claim 5,

a pattern forming surface on which the plurality of conductive patterns are formed and a coil disposing surface on which the coil is disposed are provided on an outer periphery of the lens holding member,

the coil disposition surface is disposed on the base member side of the pattern formation surface,

a step portion is formed between the coil disposition surface and the pattern formation surface,

the upper end portion of the coil faces the lower surface of the stepped portion in a state where at least a part of the upper end portion is in contact with the lower surface of the stepped portion.

8. The lens driving device according to any one of claims 1 to 4,

the 1 st support portion of the 1 st divided spring portion includes: a fixing portion fixed to the lens holding member; and a bending part bent to expose a connection part connected to the 1 st conductive pattern,

the connection portion exposed to the inside of the bent portion is connected to the bent portion by a conductive bonding material.

9. The lens driving device according to claim 6,

the 1 st support portion of the 1 st divided spring portion includes: a fixing portion fixed to the lens holding member; and a bending part bent to expose a connection part connected to the 1 st conductive pattern,

the connection portion exposed to the inside of the bent portion is connected to the bent portion by a conductive bonding material.

10. The lens driving device according to claim 8,

the 1 st support portion of the 1 st divided spring portion has an extension portion extending from the bent portion,

the bent portion is disposed between the fixing portion and the extension portion, and the fixing portion, the bent portion, and the extension portion face an upper end surface of the lens holding member.

11. The lens driving device according to claim 9,

the 1 st support portion of the 1 st divided spring portion has an extension portion extending from the bent portion,

the bent portion is disposed between the fixing portion and the extension portion, and the fixing portion, the bent portion, and the extension portion face an upper end surface of the lens holding member.

12. A camera module, comprising:

the lens driving device according to any one of claims 1 to 11;

the lens body; and

and an imaging element facing the lens body.

Images