Lens drive device and camera module

Abstract

A lens driving device (101) includes: a lens holding member (2); a coil (3) held in the lens holding member (2); a first magnetic field generating member (5A) and a second magnetic field generating member (5B) facing each other across the coil (3) and the lens holding member (2); a detection magnet (8) held in the lens holding member (2); a magnetic detection member (11) configured to face the detection magnet (8); and a balancing magnet (9) held in the lens holding member (2) at a position facing the detection magnet (8) across the optical axis (JD) of the lens body. The detection magnet (8) is positioned closer to the first magnetic field generating member (5A) than the second magnetic field generating member (5B), and the balancing magnet (9) is positioned closer to the second magnetic field generating member (5B) than the first magnetic field generating member (5A).

Description

[0001] This invention is a divisional application of Chinese Patent Application No. 201980082180.3, filed by the applicant on December 11, 2019, entitled "Lens Driving Device and Camera Module". Technical Field

[0002] This disclosure relates to a lens driving device mounted on, for example, a portable device with a camera, and a camera module including the lens driving device. Background Technology

[0003] Conventionally, lens driving devices are known that include a magnetic yoke, a lens holding member, a coil disposed on the outer periphery of the lens holding member, and a pair of flat magnets mounted on the magnetic yoke opposite to the coil (see Patent Document 1). In this device, the lens holding member is held by a conductive leaf spring so that it can move along the optical axis. Furthermore, the lens holding member includes a detection magnet for detecting the position of the lens holding member. The position of the lens holding member is derived based on the output of a Hall element mounted on a fixed-side member opposite to the detection magnet. The derived position of the lens holding member is used for feedback control of the drive current.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2016-017977 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, in the lens driving device described above, the detection magnet is positioned at the furthest point from each of the pair of plate magnets, i.e., in the middle of the two plate magnets, in order to avoid magnetic interference with each of them. Therefore, the lens driving device restricts the degree of freedom in the placement of the detection magnet, and thus restricts the design freedom of the lens driving device.

[0009] Therefore, it is desirable to provide a lens driving device that can improve design freedom.

[0010] Methods for solving problems

[0011] The lens driving device according to embodiments of the present invention includes: a frame having an outer peripheral wall portion and an upper plate portion, the outer peripheral wall portion including a first side plate portion and a second side plate portion facing each other; a lens holding member located in the frame and capable of holding a lens body; a coil held in the lens holding member; a first magnetic field generating member and a second magnetic field generating member facing each other across the coil and the lens holding member; a detection magnet held in the lens holding member for detecting the position of the lens holding member; a magnetic detection member configured to face the detection magnet; a balancing magnet held in the lens holding member at a position facing the detection magnet across the optical axis of the lens body; and a first leaf spring and a second leaf spring supporting the lens holding member so as to be movable along the optical axis direction and respectively connected to one end and the other end of the wire constituting the coil, wherein the detection magnet is disposed closer to the first magnetic field generating member than the second magnetic field generating member, and the balancing magnet is disposed closer to the second magnetic field generating member than the first magnetic field generating member.

[0012] Invention Effects

[0013] The above methods provide a lens driving device that increases design freedom. Attached Figure Description

[0014] Figure 1 This is an exploded three-dimensional view of the lens driving device.

[0015] Figure 2A This is a top-view view of the lens driving device.

[0016] Figure 2B This is the front view of the lens drive device.

[0017] Figure 3A This is a top view of the lens drive device.

[0018] Figure 3B This is a bottom view of the lens drive device.

[0019] Figure 4A This is a top-view perspective view of the lens drive device with the magnetic yoke omitted.

[0020] Figure 4B This is a top perspective view of the lens drive device with the gasket component and magnetic yoke omitted.

[0021] Figure 5A This is a three-dimensional view of the lens holding component from above.

[0022] Figure 5B This is a top-view perspective view of the lens holding component with a coil wound around it.

[0023] Figure 6A This is a three-dimensional view of the lower part of the lens holding component.

[0024] Figure 6B This is a bottom perspective view of a lens holding component with a coil wound around it.

[0025] Figure 7A This is a top view of the lens holding component.

[0026] Figure 7B This is a top view of the lens holding component with a coil wound around it.

[0027] Figure 8A This is a bottom view of the lens holding component.

[0028] Figure 8B This is a bottom view of the lens holding component with a coil wound around it.

[0029] Figure 9A This is an enlarged 3D view of a part of the lens holding component.

[0030] Figure 9B This is an enlarged stereoscopic view of another part of the lens holding component.

[0031] Figure 10A This is a bottom view of the lens drive device with the metal parts and base parts omitted.

[0032] Figure 10B This is a bottom view of the lens drive device with the metal parts, base parts, gasket parts, magnetic yoke, upper leaf spring and lower leaf spring omitted.

[0033] Figure 11A This is a top view of the upper leaf spring.

[0034] Figure 11B This is a top view of the lower leaf spring.

[0035] Figure 12A This is a bottom view of a lens retaining assembly that includes a coil and a lower leaf spring.

[0036] Figure 12B This is a side view of a part of a lens retaining assembly, which includes a coil and a lower leaf spring.

[0037] Figure 13 These are exploded and completed perspective views of the base component of the lens drive device.

[0038] Figure 14A This is a diagram showing the inner pattern layer disposed on the inner side of a flexible printed circuit board.

[0039] Figure 14BThis is a diagram showing the outer pattern layer disposed on the outer side of a flexible printed circuit board.

[0040] Figure 15A This is a 3D view of a flexible printed circuit board.

[0041] Figure 15B It is a three-dimensional view of the metal components and the flexible printed circuit board.

[0042] Figure 15C It is a three-dimensional view of the metal components, flexible printed circuit board, and lower leaf spring.

[0043] Figure 15D It is a three-dimensional view of the coil, metal parts, flexible printed circuit board, and lower leaf spring.

[0044] Figure 16A This is a top view of a drive mechanism showing an example of the configuration of a coil, a magnetic field generating component, a detection magnet, a balancing magnet, and a magnetic detection component.

[0045] Figure 16B yes Figure 16A The rear view of the drive mechanism shown.

[0046] Figure 16C yes Figure 16A The right view of the drive mechanism shown.

[0047] Figure 16D yes Figure 16A The left view of the drive mechanism shown.

[0048] Figure 17A This is a top view of a drive mechanism showing another example of the configuration of the coil, magnetic field generating component, detection magnet, balancing magnet, and magnetic detection component.

[0049] Figure 17B yes Figure 17A The rear view of the drive mechanism shown.

[0050] Figure 17C yes Figure 17A The right view of the drive mechanism shown.

[0051] Figure 17D yes Figure 17A The left view of the drive mechanism shown.

[0052] Figure 18A This is a top view of a drive mechanism showing another example of the configuration of a coil, a magnetic field generating component, a detection magnet, a balancing magnet, and a magnetic detection component.

[0053] Figure 18B yes Figure 18A The rear view of the drive mechanism shown.

[0054] Figure 18C yes Figure 18A The right view of the drive mechanism shown.

[0055] Figure 18D yes Figure 18A The left view of the drive mechanism shown.

[0056] Figure 19 It is a three-dimensional view of the gasket component, the magnetic field generating component, and the flexible printed circuit board.

[0057] Figure 20A It is a cross-sectional view of the gasket component, the magnetic yoke, and the flexible printed circuit board.

[0058] Figure 20B It is a cross-sectional view of the gasket component, the magnetic yoke, and the flexible printed circuit board. Detailed Implementation

[0059] Hereinafter, the lens driving device 101 according to an embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 This is an exploded perspective view of the lens driving device 101. Figure 2A This is a top-view perspective view of the lens driving device 101. Figure 2B This is a front view of the lens drive device 101 as viewed from the Y2 side. Figure 3A This is a top view of the lens drive device 101. Figure 3B This is a bottom view of the lens drive device 101. Figure 4A This is a top perspective view of the lens drive device 101 with the magnetic yoke 4 removed. Figure 4B This is a top perspective view of the lens drive device 101 with the gasket component 1 and the magnetic yoke 4 removed. Figure 4A as well as Figure 4B All with Figure 2A correspond.

[0060] like Figure 1 As shown, the lens driving device 101 includes a lens holding member 2 capable of holding a lens body (not shown), a drive mechanism MK for moving the lens holding member 2 along the optical axis direction (Z-axis direction) associated with the lens body, a leaf spring 6 supporting the lens holding member 2 so as to be movable along the optical axis direction, a fixed side member RG for fixing the leaf spring 6, and a metal member 7 for electrical connection. The lens body is, for example, a cylindrical lens barrel having at least one lens, configured such that its central axis is along the optical axis direction. The optical axis direction includes the direction of the optical axis JD associated with the lens body and a direction parallel to the optical axis JD.

[0061] like Figure 1As shown, the drive mechanism MK includes: a coil 3 having two elliptical winding portions 13 on two opposing sides of the four sides of the lens holding member 2, which has a generally rectangular shape when viewed from above; a magnetic yoke 4, which also serves as a rectangular box-shaped outer housing; a magnetic field generating member 5, which is arranged opposite the coil 3 in the radial direction (perpendicular to the optical axis); a detection magnet 8 and a balancing magnet 9, which are mounted on the lens holding member 2; and a magnetic detection member 11, which is mounted on the flexible printed circuit board 10.

[0062] The detection magnet 8 is a diode magnet mounted on the lens holding member 2 for detecting the position of the lens holding member 2. The balancing magnet 9 is a diode magnet mounted on the lens holding member 2 to counteract the effect of the weight of the detection magnet 8 on the lens holding member 2, and has the same weight as the detection magnet 8. In this embodiment, the detection magnet 8 is arranged with its magnetization direction opposite to that of the balancing magnet 9. Furthermore, both the detection magnet 8 and the balancing magnet 9 are fixed to the lens holding member 2 with adhesive.

[0063] The magnetic detection component 11 includes a Hall element for detecting the magnetic field generated by the detection magnet 8, and a driver IC with a built-in current control circuit for controlling the current flowing in the coil 3. In this embodiment, the magnetic detection component 11 is composed of an electronic component that houses at least the Hall element and the chip constituting the driver IC in a single package.

[0064] The magnetic yoke 4 forms part of the drive mechanism MK. In this embodiment, the magnetic yoke 4 is manufactured by punching and stretching a sheet material made of a soft magnetic material such as iron. However, the magnetic yoke 4 can also be replaced by a cover made of a non-magnetic material such as austenitic stainless steel.

[0065] Specifically, such as Figure 1 As shown, the magnetic yoke 4 has a box-shaped shape that defines the storage portion 4s. Furthermore, the magnetic yoke 4 has a rectangular cylindrical outer peripheral wall portion 4A and a flat annular upper plate portion 4B that is continuous with the upper end (Z1 side end) of the outer peripheral wall portion 4A. An opening is formed in the upper plate portion 4B.

[0066] The outer peripheral wall portion 4A includes a first side plate portion 4A1 to a fourth side plate portion 4A4. The first side plate portion 4A1 and the second side plate portion 4A2 are opposite to each other, and the third side plate portion 4A3 and the fourth side plate portion 4A4 are opposite to each other. Furthermore, in this embodiment, the first side plate portion 4A1 and the second side plate portion 4A2 are perpendicular to the third side plate portion 4A3 and the fourth side plate portion 4A4, respectively.

[0067] The detection magnet 8 is disposed on an upper side (Z1 side) of the corner of the lens holding member 2, which has a generally rectangular shape when viewed from above. Specifically, the detection magnet 8 is embedded in a recess formed at a position closer to the fourth side plate 4A4 than the first side plate 4A1 on the upper side of the corner of the lens holding member 2, which is located between the side plate 4A1 and the side plate 4A4.

[0068] The balancing magnet 9 is disposed on the upper side of another corner of the lens holding member 2. Specifically, the balancing magnet 9 is embedded in the upper side of the corner between the side opposite the second side plate 4A2 and the side opposite the third side plate 4A3, which is one of the four sides of the lens holding member 2, in a recess formed closer to the third side plate 4A3 than the second side plate 4A2.

[0069] The magnetic yoke 4 thus constructed houses the coil 3 and the magnetic field generating component 5 within the housing section 4s, and as... Figure 2A As shown, it is combined with the base component 18 to form a frame together with the base component 18. The base component 18 is opposite to the upper plate portion 4B of the cover component, i.e., the magnetic yoke 4, in the optical axis direction.

[0070] The magnetic field generating component 5 forms part of the drive mechanism MK. In this embodiment, the magnetic field generating component 5 includes a first magnetic field generating component 5A configured to face the first side plate portion 4A1, and a second magnetic field generating component 5B configured to face the second side plate portion 4A2.

[0071] The first magnetic field generating component 5A is constructed by combining two diode magnets. However, the first magnetic field generating component 5A can be constructed by a single diode magnet or a single quadrupole magnet. The same applies to the second magnetic field generating component 5B.

[0072] Specifically, such as Figure 1 As shown, the first magnetic field generating component 5A includes a first upper magnet 5AU and a first lower magnet 5AL. Furthermore, the second magnetic field generating component 5B includes a second upper magnet 5BU and a second lower magnet 5BL.

[0073] The first upper magnet 5AU, the first lower magnet 5AL, the second upper magnet 5BU, and the second lower magnet 5BL are all approximately cuboid in shape. Furthermore, the magnetic field generating component 5 is located outside the coil 3 (winding portion 13) and is arranged along two sides of the outer peripheral wall portion 4A of the yoke 4. In addition, the magnetic field generating component 5 is fixed to the inner surface of the outer peripheral wall portion 4A by an adhesive.

[0074] The leaf spring 6 includes an upper leaf spring 16 disposed between the lens holding member 2 and the magnetic yoke 4 (shim member 1), and a lower leaf spring 26 disposed between the lens holding member 2 and the base member 18. The lower leaf spring 26 includes a lower leaf spring 26A and a lower leaf spring 26B.

[0075] The fixed side component RG includes a gasket component 1, a magnetic yoke 4, and a base component 18 in which a metal component 7 is embedded.

[0076] The gasket component 1 is configured to prevent the lens holding component 2 from colliding with the magnetic yoke 4 when the lens holding component 2 moves in the Z1 direction.

[0077] The lens drive unit 101 has a generally rectangular shape and is mounted on a substrate (not shown) on which an imaging element (not shown) is mounted. The substrate, the lens drive unit 101, the lens body mounted on the lens holding member 2, and the imaging element mounted on the substrate opposite to the lens body constitute a camera module. The coil 3 is connected to the magnetic detection member 11 via the lower leaf spring 26, the metal member 7, and the flexible printed circuit board 10. When current flows from the current control circuit (driver IC) of the magnetic detection member 11 to the coil 3, the drive mechanism MK generates an electromagnetic force along the optical axis.

[0078] The lens driving device 101 uses this electromagnetic force to move the lens holding member 2 along the optical axis on the Z1 side (subject side) of the imaging element, thereby realizing the automatic focus adjustment function. Specifically, the lens driving device 101 can perform macro photography by moving the lens holding member 2 away from the imaging element, and can perform infinity photography by moving the lens holding member 2 closer to the imaging element.

[0079] Next, the lens holding component 2 and the drive mechanism MK will be described. Figure 5A This is a top-view perspective view of lens holding component 2. Figure 5B Indicates in Figure 5A The lens holding component 2 is in a state where the coil 3 is wound around it. Figure 6A This is a bottom perspective view of lens holding component 2. Figure 6B Indicates in Figure 6A The lens holding component 2 is in a state where the coil 3 is wound around it. Figure 7A This is a top view of lens holding component 2. Figure 7B Indicates in Figure 7A The lens holding component 2 is in a state where the coil 3 is wound around it. Figure 8A This is a bottom view of lens holding component 2. Figure 8B Indicates in Figure 8A The lens holding component 2 shown is in a state where the coil 3 is wound around it. Figure 9A yes Figure 8B The enlarged 3D view of part P shown. Figure 9B yes Figure 8B The image shown is a magnified 3D view of part Q. Figure 10A This is a bottom view of the lens drive device 101, omitting the metal component 7 and the base component 18. Figure 10B This is a bottom view of the lens drive device 101, with the gasket component 1, magnetic yoke 4, upper leaf spring 16, and lower leaf spring 26 further omitted from the illustration.

[0080] In this embodiment, the lens holding member 2 is manufactured by injection molding a synthetic resin such as a liquid crystal polymer (LCP). Specifically, such as... Figure 5A As shown, the lens holding member 2 includes a cylindrical portion 12 having a through hole extending along the optical axis.

[0081] A threaded groove is provided on the inner circumferential surface of the cylindrical portion 12 for mounting the lens body. Furthermore, a pedestal portion 12d with four recesses 12dh is provided on the end face of the cylindrical portion 12 on the subject side. Figure 4A As shown, the inner portion 16i of the upper leaf spring 16 is mounted on the base portion 12d.

[0082] like Figure 5A As shown, a winding protrusion 12p for holding the coil 3 is provided on the outer peripheral surface of the cylindrical portion 12. In this embodiment, the winding protrusion 12p is formed into a generally cuboid shape that protrudes radially outward from the outer peripheral surface of the cylindrical portion 12, so that the coil 3 is wound around an axis perpendicular to the optical axis direction. Specifically, the winding protrusion 12p is disposed on two opposing outer surfaces of the lens holding member 2.

[0083] like Figure 5B As shown, coil 3 is formed by winding conductive wire around the winding protrusion 12p. Specifically, as Figure 6B As shown, the coil 3 includes a first coil 3A positioned opposite the first side plate portion 4A1, a second coil 3B positioned opposite the second side plate portion 4A2, and a connecting portion 3C connecting the first coil 3A and the second coil 3B. Furthermore, the winding protrusion 12p includes a first winding protrusion 12pA for winding the first coil 3A and a second winding protrusion 12pB for winding the second coil 3B. In this embodiment, the coil 3 is fixed to the winding protrusion 12p without using adhesive, but adhesive can also be used to fix it to the winding protrusion 12p. Moreover, the winding direction of the coil 3 is arbitrary and determined according to the configuration (magnetization direction) of the magnetic field generating component 5.

[0084] The first coil 3A includes a winding portion 13 forming a coil body portion that is wound in a ring around the first winding protrusion 12pA, and the second coil 3B includes a winding portion 13 forming a coil body portion that is wound in a ring around the second winding protrusion 12pB. For clarity, Figure 5B The diagram of the winding state of the winding section 13 omits details of the conductive wire covering the surface through the insulating member. The same applies to the other figures illustrating the winding section 13.

[0085] like Figure 6A As shown, the lens holding member 2 includes two holding portions 72 that are square protrusions protruding downwards (in the Z2 direction) from the end face of the image element side (Z2 side) and four circular protrusions 2t.

[0086] like Figure 6B As shown, the holding portion 72 includes a first holding portion 72A corresponding to the winding start side of the coil 3, and a second holding portion 72B corresponding to the winding end side of the coil 3. Both ends of the coil 3 are wound around the holding portion 72 and held thereon.

[0087] like Figure 6A as well as Figure 10A As shown, the protruding portion 2t includes two protruding portions 2t corresponding to the lower leaf spring 26A and two protruding portions 2t corresponding to the lower leaf spring 26B. The inner portions 26i of each of the lower leaf springs 26A and 26B, serving as movable side supports, are mounted and fixed to the protruding portions 2t. The inner portions 26i of each of the lower leaf springs 26A and 26B are fixed to the lens holding member 2 by thermal riveting the protruding portions 2t that pass through the through holes formed in the inner portions 26i. In the accompanying drawings related to this embodiment, the protruding portions 2t are shown in a deformed state at their front ends after thermal riveting.

[0088] Next, the drive mechanism MK of the lens drive device 101 will be described. For example... Figure 10A as well as Figure 10B As shown, the drive mechanism MK includes a coil 3, a magnetic yoke 4, and two magnetic field generating components 5 arranged opposite to the two side plate portions (first side plate portion 4A1 and second side plate portion 4A2) constituting the outer peripheral wall portion 4A of the magnetic yoke 4. Specifically, the magnetic field generating components 5 include a first magnetic field generating component 5A arranged opposite to the first side plate portion 4A1 and a second magnetic field generating component 5B arranged opposite to the second side plate portion 4A2. Furthermore, the drive mechanism MK generates a driving force (thrust) by the current flowing in the coil 3 and the magnetic field generated by the magnetic field generating components 5, causing the lens holding component 2 to move up and down along the optical axis.

[0089] like Figure 8BAs shown, the extension 33 of the coil 3 includes a first extension 33A connected to the first coil 3A at the beginning of the winding of the coil 3, and a second extension 33B connected to the second coil 3B at the end of the winding of the coil 3.

[0090] Specifically, such as Figure 9A As shown, the first extension 33A includes a winding portion 33m wound around the first holding portion 72A, a first opposing portion 33c extending opposite to the bottom surface (Z2 side surface) of the lens holding member 2, and a second opposing portion 33k extending opposite to the edge portion located between the bottom surface and the front surface (X1 side surface) of the lens holding member 2. Figure 9B As shown, the second extension 33B includes a winding portion 33m wound around the second holding portion 72B, a first opposing portion 33c extending opposite to the bottom surface (Z2 side surface) of the lens holding member 2, and a second opposing portion 33k extending opposite to the edge portion located between the bottom surface and the rear surface (X2 side surface) of the lens holding member 2.

[0091] In this embodiment, the first extension 33A is wound around the first holding portion 72A of the lens holding member 2 before the wire of the coil 3 is wound around the outer periphery of the first winding protrusion 12pA. Figure 9A In the example shown, a portion of the wire of coil 3 is wound four turns around the first holding portion 72A. Thus, the winding portion 33m is formed in the first holding portion 72A, and a portion of the first extension portion 33A is held in the first holding portion 72A. However, the first extension portion 33A may also be wound around the first holding portion 72A after the wire of coil 3 has been wound around the outer periphery of the first winding protrusion 12pA.

[0092] Next, the wire is wound around the outer periphery of the first winding protrusion 12pA. At this time, as... Figure 9A As shown, the wire extending from the winding portion 33m extends in a manner opposite to the bottom surface of the lens holding member 2, and further extends in a manner opposite to the edge portion located between the bottom surface and the front surface of the lens holding member 2. At this time, the portion opposite to the bottom surface of the lens holding member 2 constitutes the first opposing portion 33c of the first extension portion 33A, and the portion opposite to the edge portion of the lens holding member 2 constitutes the second opposing portion 33k of the first extension portion 33A.

[0093] The second opposing portion 33k of the first extension 33A is configured to extend opposite the edge of the lens holding member 2, such as Figure 9AAs shown, the first extension 33A of the coil 3 contacts the edge of the lens holding member 2. Therefore, when a strong impact is applied to the lens drive device 101 due to falling or the like, the first extension 33A of the coil 3 is pressed against the edge of the lens holding member 2. In this embodiment, the edge of the lens holding member 2 is curved. Therefore, the first extension 33A is difficult to cut off at the edge of the lens holding member 2. The same applies to the edge of the lens holding member 2 that contacts the second extension 33B.

[0094] Next, a connecting portion 3C is formed by pulling wire from the winding portion 13 of the first coil 3A. Then, wire is also wound around the outer periphery of the second winding protrusion 12pB. Then, when the winding of wire to the outer periphery of the first winding protrusion 12pA and the winding of wire to the outer periphery of the second winding protrusion 12pB are completed, as... Figure 9B As shown, a second extension 33B, connected to the end of the winding portion 13 of the second coil 3B, is pulled out from the rear side of the lens holding member 2 towards the bottom surface. Specifically, the second opposing portion 33k extends opposite to the edge portion located between the bottom surface and the rear side of the lens holding member 2, the first opposing portion 33c extends opposite to the bottom surface of the lens holding member 2, and the winding portion 33m is wound around the second holding portion 72B of the lens holding member 2. Figure 9B In the example shown, the second extension 33B is wound around the second retaining part 72B four times.

[0095] Next, the details of the leaf spring 6 and the fixed-side component RG will be explained. Figure 11A This is a top view of the upper leaf spring 16. Figure 11B This is a top view of the lower leaf spring 26. Figure 12A as well as Figure 12B This diagram illustrates an example of the connection structure between the lower leaf spring 26B and the coil 3. Specifically, Figure 12A yes Figure 10A The enlarged view of part T shown. Figure 12B Viewed from the X2 side Figure 10A The enlarged view shown is of the lower leaf spring 26B, coil 3, and lens holding member 2 at time T. Additionally, in Figure 12A as well as Figure 12B In the diagram, for ease of explanation, the conductive adhesive CA, which serves as the second bonding material AD2, is represented by a cross-shaded line. Figure 13 This figure illustrates the base member 18, which serves as the fixed-side member RG. Specifically, Figure 13 It is an exploded perspective view and a completed perspective view of the base component 18 in which the metal component 7 is embedded.

[0096] In this embodiment, the leaf spring 6 is made from a metal plate primarily of copper alloy. The leaf spring 6 includes an upper leaf spring 16 disposed between the lens holding member 2 and the magnetic yoke 4 (shield member 1), and a lower leaf spring 26 disposed between the lens holding member 2 and the base member 18. With the lens holding member 2 engaged with the leaf spring 6 (upper leaf spring 16, lower leaf spring 26A, and lower leaf spring 26B), the leaf spring 6 supports the lens holding member 2 in a manner that allows the lens holding member 2 to move along the optical axis (Z-axis direction). The lower leaf springs 26A and 26B also function as power supply members for supplying current to the coil 3. Therefore, the lower leaf spring 26A is electrically connected to one end of the coil 3, and the lower leaf spring 26B is electrically connected to the other end of the coil 3. A shim member 1 is disposed between the upper leaf spring 16 and the magnetic yoke 4.

[0097] like Figure 11A As shown, the upper leaf spring 16, viewed from above, has a generally rectangular shape and includes an inner portion 16i fixed to the lens holding member 2 as a movable side support, an outer portion 16e fixed to the gasket member 1 (which is a fixed side member RG) as a fixed side support, and four elastic arms 16g located between the inner portion 16i and the outer portion 16e. Specifically, the inner portion 16i is positioned opposite the base portion 12d of the lens holding member 2. The outer portion 16e has four corner portions 16b and two beam portions 16r connecting two adjacent corner portions 16b. Figure 4A as well as Figure 4B As shown, the beam portion 16r is clamped by the gasket component 1 and the magnetic field generating component 5 and fixed by adhesive. The corner portion 16b is fixed to the corner of the gasket component 1 by adhesive. The gasket component 1, the magnetic yoke 4, and the magnetic field generating component 5 function as the fixed side component RG.

[0098] Specifically, when the upper leaf spring 16 is assembled to the lens drive device 101, as follows: Figure 4A As shown, the inner portion 16i is mounted on the pedestal portion 12d of the lens holding member 2 (see reference). Figure 5A Then, the inner portion 16i is fixed to the base portion 12d using adhesive, thereby fixing the inner portion 16i to the lens holding member 2. (See image below.) Figure 4B As shown, the outer portion 16e contacts the upper surface (Z1 side surface) of the magnetic field generating component 5 and is clamped in the pad component 1 (see reference). Figure 4A It is fixed between the magnetic field generating component 5 and the magnetic field generating component 5.

[0099] like Figure 11AAs shown, the upper leaf spring 16 is formed to be approximately symmetrical about the left and right (rotationally symmetrical about the optical axis JD twice). Furthermore, the inner portion 16i is fixed to the lens holding member 2, and the outer portion 16e is fixed to the magnetic yoke 4 via the spacer member 1. Therefore, the upper leaf spring 16 can provide good balance and support for the lens holding member 2.

[0100] like Figure 11B As shown, the lower leaf springs 26A and 26B are configured such that their inner sides are approximately semi-circular. Furthermore, each leaf spring includes an inner portion 26i fixed to the lens holding member 2 as a movable side support, an outer portion 26e fixed to the base member 18 (which is a fixed side member RG) as a fixed side support, and an elastic arm 26g located between the inner portion 26i and the outer portion 26e.

[0101] like Figure 11B As shown, the inner portion 26i of each of the lower leaf springs 26A and 26B includes two inner engagement portions 26c that engage with the lens retaining member 2, a first connecting portion 26p that connects the two inner engagement portions 26c, and a connecting plate portion 26h that opposes the extension portion 33 of the coil 3.

[0102] When the lower leaf springs 26A and 26B are assembled into the lens drive device 101 Figure 6A The four protrusions 2t of the lens holding component 2 shown are respectively inserted into the lens holding component 2. Figure 11B The lower leaf springs 26A and 26B are fitted into the circular through holes of their respective inner engaging portions 26c. Thus, the inner portions 26i of each of the lower leaf springs 26A and 26B are positioned and fixed relative to the lens retaining member 2. The lower leaf springs 26A and 26B are fixed to the lens retaining member 2, for example, by hot riveting or cold riveting the protrusion 2t of the lens retaining member 2.

[0103] The following mainly describes the relationship between the lower leaf spring 26B, the lens holding member 2, and the coil 3. However, the description of the lower leaf spring 26B can also be applied to the lower leaf spring 26A.

[0104] like Figure 12A as well as Figure 12B As shown, when the lens drive device 101 is assembled, the connecting plate portion 26h of the inner portion 26i of the lower leaf spring 26B is positioned opposite the protrusion 82 of the lens holding member 2. That is, as Figure 12A As shown, the subject-side (Z1 side) surface of the connecting plate portion 26h faces the receiving portion 82s formed by the protrusion portion 82. Furthermore, as... Figure 12BAs shown, the first opposing portion 33c of the second extension portion 33B of the coil 3 extends between the subject-side surface of the inner portion 26i (connecting plate portion 26h) of the lower leaf spring 26B and the imaging element-side (Z2 side) surface of the lens holding member 2.

[0105] like Figure 9B As shown, the protrusion 82 includes an inner wall portion 82u located on the center side of the lens holding member 2, an outer wall portion 82v opposite to the inner wall portion 82u and located on the outer side, and a side wall portion 82w located between the inner wall portion 82u and the outer wall portion 82v on the side close to the second holding member 72B. Figure 9B As shown, an open portion 82z with a cut-out wall is formed on the side of the protrusion 82 away from the second retaining portion 72B. Furthermore, a storage portion 82s is formed in the space surrounded by three wall portions (inner wall portion 82u, outer wall portion 82v, and side wall portion 82w). The storage portion 82s is configured to accommodate the conductive adhesive CA that connects the second extension 33B of the coil 3 to the lower leaf spring 26B. In this embodiment, the protrusion 82 is formed adjacent to the second retaining portion 72B; therefore, the side wall of the second retaining portion 72B is appropriately used as the side wall portion 82w of the protrusion 82. Thus, the storage portion 82s is provided adjacent to the second retaining portion 72B.

[0106] When the lower leaf spring 26B is assembled to the lens retaining component 2, as Figure 12B As shown, the second retaining portion 72B protrudes downward (in the Z2 direction) relative to the inner portion 26i, such that its front end is located on the camera element side (Z2 side) of the inner portion 26i of the lower leaf spring 26B. In addition, a portion of the winding portion 33m is also wound around the second retaining portion 72B in such a way that it is located on the camera element side (Z2 side) of the inner portion 26i.

[0107] The lower leaf spring 26B and the second extension 33B of the coil 3 are physically and electrically connected by a conductive adhesive CA containing conductive fillers such as silver particles dispersed in a synthetic resin. Specifically, before assembling the lower leaf spring 26B to the lens holding member 2, the receiving portion 82s surrounded by the protrusion 82 of the lens holding member 2 is filled with the conductive adhesive CA, and then the lower leaf spring 26B is assembled to the lens holding member 2. Then, the protrusion 2t of the lens holding member 2 is heat-riveted, and the conductive adhesive CA is heat-cured. With the lens holding member 2 inverted such that the second holding portion 72B protrudes vertically upward, the conductive adhesive CA is filled into the receiving portion 82s and heat-cured. Therefore, even when the conductive adhesive CA is fluid, it can be properly held in the desired position (the position within the receiving portion 82s). Furthermore, a portion of the first opposing portion 33c is embedded within the conductive adhesive CA because it is disposed within the housing portion 82s. Additionally, the conductive adhesive CA is not limited to a thermosetting type, but can also be a UV-curable type.

[0108] like Figure 11B As shown, the outer portion 26e of the lower leaf spring 26B includes two outer engaging portions 26d that engage with the base component 18, and a second connecting portion 26q that connects the two outer engaging portions 26d. A through hole is provided in the outer engaging portion 26d of the lower leaf spring 26B, and a protrusion 18t is provided on the upper surface of the base component 18 (see reference). Figure 13 。 ) Fitting. Thus, the outer portion 26e of the lower leaf spring 26B is positioned and fixed relative to the base component 18.

[0109] like Figure 11B As shown, the lower leaf springs 26A and 26B are formed to be approximately symmetrical (rotationally symmetrical about the optical axis JD twice). Furthermore, the lower leaf spring 26B is connected to the lens holding member 2 at its two inner joint portions 26c, and to the base member 18 at its two outer joint portions 26d. The same applies to the lower leaf spring 26A. With this configuration, the lower leaf springs 26A and 26B can provide balanced support to the lens holding member 2 while allowing it to move along the optical axis.

[0110] Next, the details of the fixed side component RG will be explained. The fixed side component RG includes a washer component 1 for fixing the upper leaf spring 16, a magnetic yoke 4 and a magnetic field generating component 5, and a base component 18 for fixing the lower leaf springs 26A and 26B respectively.

[0111] The base component 18 is manufactured by injection molding using a synthetic resin such as a liquid crystal polymer. In this embodiment, as... Figure 13As shown, the base component 18 is a component with a generally rectangular plate shape and a circular opening 18k formed in the center. Furthermore, six upwardly projecting portions 18t are provided on the subject-side (Z1 side) surface (upper surface) of the base component 18. The projecting portions 18t are inserted into and fitted into through holes provided in the outer joining portions 26d of the lower leaf springs 26A and 26B, respectively. At this time, the projecting portions 18t are fixed to the outer joining portions 26d by heat riveting. In the accompanying drawings related to this embodiment, the projecting portions 18t are shown in a deformed state at their front ends after heat riveting. The projecting portions 18t can also be fixed to the outer joining portions 26d by cold riveting.

[0112] like Figure 13 As shown, a metal part 7, formed from a metal plate containing a material such as copper or iron or an alloy thereof, is embedded into a base part 18 by an embedding process.

[0113] Metal component 7 includes first metal component 7A to fifth metal component 7E. First metal component 7A has a connecting portion 7AC exposed from the outer peripheral side surface (Y2 side surface) of base component 18, and second metal component 7B has a connecting portion 7BC exposed from the outer peripheral side surface (Y2 side surface) of base component 18. The surfaces of connecting portions 7AC and 7BC are located on the same plane.

[0114] The connecting portion 7AC, formed by bending into an L-shape, connects with two conductive portions 10C formed on the flexible printed circuit board 10 on which the magnetic detection component 11 is mounted (see reference). Figure 15A With the first conductive portion 10C1 of one of the components facing each other, it is connected to the first conductive portion 10C1 via a conductive bonding material. The conductive bonding material is, for example, solder or a conductive adhesive. In this embodiment, a conductive adhesive is used.

[0115] Similarly, the connecting portion 7BC, which is formed by bending into an L-shape, is connected to the second conductive portion 10C2 via a conductive bonding material when it is facing the second conductive portion 10C2, which is the other of the two conductive portions 10C.

[0116] The third metal component 7C has a protrusion 7CT that protrudes from the corner of the base component 18 in the Z2 direction. Furthermore, the third metal component 7C, the fourth metal component 7D, and the fifth metal component 7E each have end portions 7CR, 7DR, and 7ER1 and 7ER2 that protrude outward from the corner of the base component 18 in a direction perpendicular to the optical axis. Figure 2A as well as Figure 2BAs shown, ends 7CR, 7DR, 7ER1, and 7ER2 are respectively configured to contact the lower ends of the four corners of the magnetic yoke 4. Through this configuration, the third metal component 7C to the fifth metal component 7E are electrically connected to each other via the magnetic yoke 4, and are grounded through the protrusion 7CT of the third metal component 7C.

[0117] With the base component 18 positioned by combining the inner surface of the outer peripheral wall portion 4A of the magnetic yoke 4 with the outer peripheral side surface of the base component 18, the ends 7CR, 7DR, 7ER1, and 7ER2 are welded to the lower ends of the four corners of the magnetic yoke 4 to fix it to the magnetic yoke 4. The magnetic yoke 4 and the base component 18 can also be fixed at least partially by adhesive.

[0118] Next, refer to Figure 14A as well as Figure 14B The details of the flexible printed circuit board 10 are described below. Figure 14A as well as Figure 14B This is a diagram showing the pattern layer formed on the flexible printed circuit board 10. Specifically, Figure 14A This refers to the inner pattern layer 10L1 disposed on the Y1 side of the flexible printed circuit board 10. Figure 14B This refers to the outer pattern layer 10L2 disposed on the Y2 side of the flexible printed circuit board 10.

[0119] The flexible printed circuit board 10 is a double-sided printed circuit board with conductive wiring patterns formed on both sides, having an inner pattern layer 10L1 disposed on the inner side (Y1 side) and an outer pattern layer 10L2 disposed on the outer side (Y2 side).

[0120] The inner pattern layer 10L1 includes first pads LD1 to LD6 connected to six connection portions (not shown) in the magnetic detection component 11, and seventh pads LD7 and eighth pads LD8 connected to two electrodes (not shown) in the capacitor 14. In this embodiment, the six connection portions in the magnetic detection component 11 are soldered to the first pads LD1 to LD6. Similarly, the two electrodes in the capacitor 14 are soldered to the seventh pads LD7 and the eighth pads LD8. The capacitor 14 is a bypass capacitor connected between the power supply voltage and the ground voltage.

[0121] The first pad LD1 is connected to the ground terminal. The second pad LD2 is connected to the power supply voltage terminal. The third pad LD3 is connected to the data signal terminal. The fourth pad LD4 is connected to the clock signal terminal. The fifth pad LD5 and the sixth pad LD6 are pads for outputting current controlled by the driver IC (current control circuit) in the magnetic detection unit 11.

[0122] like Figure 2B As shown, the outer pattern layer 10L2 is configured such that when the lens driving device 101 is assembled, the first conductive part 10C1, the second conductive part 10C2, and the first terminal part T1 to the fourth terminal part T4 are exposed.

[0123] Terminal T1 is the grounding terminal, such as... Figure 14B As shown, the second patterned part PT2 is connected to the first patterned part PT1 and then to the inner patterned layer 10L1 via the through hole V1 (see reference). Figure 14A The first pattern portion PT1 is also connected to the fourth pattern portion PT4 of the inner pattern layer 10L1 via through-hole V2. A seventh pad portion LD7 is formed at the end of the fourth pattern portion PT4. Furthermore, the first pattern portion PT1 is connected to the first pad portion LD1 of the inner pattern layer 10L1 via through-hole V3. Furthermore, the second pattern portion PT2 is connected to the third pattern portion PT3 of the outer pattern layer 10L2 via through-hole V9.

[0124] The second terminal T2 is a terminal connected to the power supply voltage and is connected to the eighth pad LD8 of the inner pattern layer 10L1 via through hole V4. In addition, the second terminal T2 is connected to the second pad LD2 of the inner pattern layer 10L1 via through hole V5.

[0125] The third terminal T3 is a terminal for data signals, which is connected to the third pad LD3 of the inner pattern layer 10L1 via the through hole V6.

[0126] The fourth terminal T4 is a clock signal terminal, which is connected to the fourth pad LD4 of the inner pattern layer 10L1 via the through hole V7.

[0127] The fifth pad LD5 of the inner pattern layer 10L1 is connected to the first conductive portion 10C1 via via V8 and the wiring pattern of the outer pattern layer 10L2. The sixth pad LD6 of the inner pattern layer 10L1 is connected to the second conductive portion 10C2 via the wiring pattern of the inner pattern layer 10L1. Furthermore, the first conductive portion 10C1 of the inner pattern layer 10L1 and the first conductive portion 10C1 of the outer pattern layer 10L2 are interconnected. The same applies to the second conductive portion 10C2.

[0128] With this configuration, the driver IC in the magnetic detection unit 11 can receive commands related to the target position of the lens holding member 2 in the optical axis direction from an external control device, such as the third terminal T3. Furthermore, the driver IC can determine the current position of the lens holding member 2 based on the magnitude of the magnetic field detected by the Hall element, and increase or decrease the magnitude of the current flowing in the coil 3 to make the difference between the current position and the target position of the lens holding member 2 zero. In other words, the driver IC can achieve feedback control of the position of the lens holding member 2 in the optical axis direction.

[0129] Next, refer to Figures 15A to 15D The electrical and physical connections of coil 3, metal component 7, flexible printed circuit board 10 and lower leaf spring 26 are described. Figures 15A to 15D This diagram illustrates the electrical and physical connections of coil 3, metal component 7, flexible printed circuit board 10, and lower leaf spring 26. Specifically, Figure 15A This is a three-dimensional view of the flexible printed circuit board 10. Figure 15B This is a perspective view of the metal component 7 and the flexible printed circuit board 10. Figure 15C This is a perspective view of the metal component 7, the flexible printed circuit board 10, and the lower leaf spring 26. Figure 15D This is a perspective view of coil 3, metal component 7, flexible printed circuit board 10, and lower leaf spring 26. Additionally, Figures 15A to 15D Use dotted shading to indicate components where current flows.

[0130] Two conductive portions 10C in the flexible printed circuit board 10 are connected to the metal component 7. Specifically, as shown in the figure... Figure 2B as well as Figure 15B As shown, the first conductive part 10C1 is connected to the connecting part 7AC of the first metal part 7A via a conductive bonding material AD, and the second conductive part 10C2 is connected to the connecting part 7BC of the second metal part 7B via a conductive bonding material AD.

[0131] like Figure 13 As shown, the first metal component 7A has a contact portion 7AP exposed on the upper surface of the base component 18. Similarly, the second metal component 7B has a contact portion 7BP exposed on the upper surface of the base component 18. The contact portion 7AP is connected to the outer engagement portion 26d of the lower leaf spring 26A by welding or a conductive adhesive. Similarly, the contact portion 7BP is connected to the outer engagement portion 26d of the lower leaf spring 26B by welding or a conductive adhesive.

[0132] The connecting plate portion 26h of the lower leaf spring 26A is connected to the first opposing portion 33c of the first extension portion 33A, which is connected to the first coil 3A, via a conductive adhesive. Figure 15D (Not visible in the image.) Similarly, the connecting plate portion 26h of the lower leaf spring 26B is connected to the first opposing portion 33c of the second extension portion 33B, which is connected to the second coil 3B, via a conductive adhesive.

[0133] Through the above connection relationship, the current output from the first conductive part 10C1 is, for example, as follows: Figure 15B As shown by arrow AR1, current flows from the connection portion 7AC of the first metal component 7A toward the contact portion 7AP. Then, the current flows as... Figure 15C As shown by arrow AR2, the flow originates from the outer engagement portion 26d of the lower leaf spring 26A toward the connecting plate portion 26h, and further, as... Figure 15D As shown by arrows AR3 to AR7, from the first opposing portion 33c of the first extension 33A ( Figure 15D (Not visible in the image.) The current flows through the first coil 3A, the connecting portion 3C, and the second coil 3B towards the first opposing portion 33c of the second extension 33B. Afterwards, the current... Figure 15C As shown by arrow AR8, the flow originates from the connecting plate portion 26h of the lower leaf spring 26B and extends outward towards the joining portion 26d, and further, as... Figure 15B As indicated by arrow AR9, current flows from the contact portion 7BP of the second metal component 7B to the second conductive portion 10C2 via the connecting portion 7BC. When current flows from the second conductive portion 10C2 to the first conductive portion 10C1, the current flows in opposite directions along the same path.

[0134] The driver IC in the magnetic detection unit 11 can control the position of the lens holding member 2 in the optical axis direction by changing the direction and magnitude of the current flowing between the first conductive part 10C1 and the second conductive part 10C2. In this embodiment, the Hall element in the magnetic detection unit 11 detects the magnetic field generated by the detection magnet 8. Then, the driver IC determines the current position of the lens holding member 2 in the optical axis direction based on the magnitude of the magnetic field detected by the Hall element. Then, the driver IC changes the direction and magnitude of the current flowing between the first conductive part 10C1 and the second conductive part 10C2 so that the difference between the current position and the target position of the lens holding member 2 in the optical axis direction becomes zero. In this way, the driver IC can control the position of the lens holding member 2 in the optical axis direction.

[0135] Next, refer to Figures 16A to 16D , Figures 17A to 17D as well as Figures 18A to 18D An example of the configuration of coil 3, magnetic field generating component 5, detection magnet 8, balancing magnet 9, and magnetic detection component 11 in the initial state where no current flows in coil 3 will be described. Furthermore, the initial state in this embodiment refers to the initial state when the optical axis JD is orthogonal to the vertical direction and oriented towards the lens driving device 101. Figures 16A to 16D This diagram illustrates an example of the configuration of the coil 3, the magnetic field generating component 5, the detection magnet 8, the balancing magnet 9, and the magnetic detection component 11. Specifically, Figure 16A This is a top view of the drive mechanism MK. Figure 16B This is a rear view of the drive mechanism MK when viewed from the Y1 side. Figure 16C This is a right view of the drive mechanism MK as seen from the X1 side. Figure 16DThis is a left view of the drive mechanism MK as seen from the X2 side. The drive mechanism MK includes a coil 3, a yoke 4, a magnetic field generating component 5, a detection magnet 8, a balancing magnet 9, and a magnetic detection component 11. Additionally, for clarity, [the following is a partial translation of the remaining text:] Figure 16A The image shows the lens holding member 2 and the flexible printed circuit board 10, but the magnetic yoke 4 is omitted. Furthermore, in Figures 16B to 16D The diagram shows the flexible printed circuit board 10, while the lens holding member 2 and the magnetic yoke 4 are omitted. Furthermore, in Figures 16A to 16D In the diagram, the N pole of the magnet is represented by a cross-shaded line, the S pole by a diagonal shaded line, and the coil 3 by a dotted shaded line.

[0136] like Figure 16A As shown, the first coil 3A is configured to face the first magnetic field generating component 5A, and the second coil 3B is configured to face the second magnetic field generating component 5B.

[0137] The detection magnet 8 is a diode magnetized in the optical axis direction, i.e., the Z-axis direction, and is configured to face the magnetic detection component 11 mounted on the inner side (Y1 side) of the flexible printed circuit board 10 in the Y-axis direction. Specifically, as Figures 16B to 16D As shown, the magnetic detection component 11 is configured such that the boundary between the N-pole portion and the S-pole portion of the detection magnet 8 is within the measurement range of the Hall element. Furthermore, a recessed wall portion is formed between the separately opposed detection magnet 8 and the magnetic detection component 11, and this recess is formed in the lens holding component 2 that houses the detection magnet 8. This wall portion is formed of synthetic resin, therefore, it does not cause magnetic interference to the detection magnet 8 or the magnetic detection component 11. However, the wall portion located between the separately opposed detection magnet 8 and the magnetic detection component 11 can be omitted. That is, the detection magnet 8 and the magnetic detection component 11 can be directly opposed or opposed through a component made of a non-magnetic material.

[0138] The balancing magnet 9 is a dipolar magnet that is magnetized in the Z-axis direction, preferably as follows: Figures 16B to 16D As shown, it is configured to be at the same height as the detection magnet 8 in the Z-axis direction.

[0139] Furthermore, when comparing linear distances, the detection magnet 8 is positioned closer to the first magnetic field generating member 5A than the second magnetic field generating member 5B, and the balancing magnet 9 is positioned closer to the second magnetic field generating member 5B than the first magnetic field generating member 5A. In this embodiment, the distance DS1 between the detection magnet 8 and the first magnetic field generating member 5A in the X-axis direction is less than the distance DS2 between the detection magnet 8 and the second magnetic field generating member 5B. Furthermore, the distance DS3 between the balancing magnet 9 and the second magnetic field generating member 5B in the X-axis direction is less than the distance DS4 between the balancing magnet 9 and the first magnetic field generating member 5A.

[0140] Furthermore, the detection magnet 8 and the balancing magnet 9 are mounted on the lens holding member 2 such that the distance DS5 between the optical axis JD and the detection magnet 8 and the distance DS6 between the optical axis JD and the balancing magnet 9 are equal. This is because the balancing magnet 9 counteracts the effect of the weight of the detection magnet 8 on the lens holding member 2.

[0141] like Figure 16B As shown, the detection magnet 8 is configured with the upper part (Z1 side) as the S pole and the lower part (Z2 side) as the N pole. The balancing magnet 9 is configured with the upper part (Z1 side) as the N pole and the lower part (Z2 side) as the S pole.

[0142] The first upper magnet 5AU is configured such that the inner portion (X2 side) opposite the upper part of the first coil 3A is the S pole and the outer portion (X1 side) is the N pole. Similarly, the first lower magnet 5AL is configured such that the inner portion (X2 side) opposite the lower part of the first coil 3A is the N pole and the outer portion (X1 side) is the S pole. This is because the current flows in opposite directions in the upper and lower parts of the first coil 3A.

[0143] The second upper magnet 5BU is configured such that the inner portion (X1 side) opposite the upper part of the second coil 3B is the N pole and the outer portion (X2 side) is the S pole. Similarly, the second lower magnet 5BL is configured such that the inner portion (X1 side) opposite the lower part of the second coil 3B is the S pole and the outer portion (X2 side) is the N pole. This is because the current flows in opposite directions in the upper and lower parts of the second coil 3B.

[0144] In this embodiment, the first magnetic field generating component 5A is positioned at the boundary between the N pole portion of the first upper magnet 5AU and the S pole portion of the first lower magnet 5AL (i.e., the boundary between the first upper magnet 5AU and the first lower magnet 5AL) within the area including Figure 16CIn the XY plane of the line segment L1 shown, the position coincides with the boundary between the N pole and S pole portions of the detection magnet 8. Similarly, the second magnetic field generating component 5B is positioned such that the boundary between the S pole portion of the second upper magnet 5BU and the N pole portion of the second lower magnet 5BL (i.e., the boundary between the second upper magnet 5BU and the second lower magnet 5BL) is included. Figure 16D In the XY plane shown, line segment L2 is positioned in a manner consistent with the boundary between the N and S poles of the balancing magnet 9. Furthermore, line segments L1 and L2 lie on the same XY plane perpendicular to the optical axis JD.

[0145] Furthermore, in this embodiment, such as Figure 16B As shown, the detection magnet 8 is configured such that its vertical width H1 converges within the vertical width H2 of the first coil 3A and within the vertical width H3 of the first magnetic field generating component 5A. The same applies to the balancing magnet 9.

[0146] With the above configuration, in the initial state, a repulsive force is generated between the upper part (S pole part) of the detection magnet 8 and the inner part (S pole part) of the first upper magnet 5AU. Therefore, the lens holding member 2, which supports the detection magnet 8 as a movable part, is directed towards... Figure 16B The force is applied in the direction indicated by arrow AR12. That is, a force is applied to the lens holding member 2 to move the lens holding member 2 away from the first magnetic field generating member 5A.

[0147] Furthermore, a repulsive force is also generated between the lower portion (N pole portion) of the detection magnet 8 and the inner portion (N pole portion) of the first lower magnet 5AL. Therefore, the lens holding member 2 is directed towards... Figure 16B The force is applied in the direction indicated by arrow AR13, which is the same direction as that indicated by arrow AR12. That is, a force is applied to the lens holding member 2 to move the lens holding member 2 away from the first magnetic field generating member 5A.

[0148] On the other hand, a repulsive force is also generated between the upper part (N pole part) of the balancing magnet 9 and the inner part (N pole part) of the second upper magnet 5BU. Therefore, the lens holding member 2 is directed towards Figure 16B The force is applied in the direction indicated by arrow AR14, which is opposite to the direction indicated by arrow AR12. That is, a force is applied to the lens holding member 2 to move the lens holding member 2 away from the second magnetic field generating member 5B.

[0149] Furthermore, a repulsive force is also generated between the lower portion (S pole portion) of the balancing magnet 9 and the inner portion (S pole portion) of the second lower magnet 5BL. Therefore, the lens holding member 2 is directed towards... Figure 16BThe force is applied in the direction indicated by arrow AR15, which is the same direction as arrow AR14 but opposite to the direction indicated by arrow AR12. That is, a force is applied to the lens holding member 2 to move the lens holding member 2 away from the second magnetic field generating member 5B.

[0150] The result is, as Figure 16A As shown, the lens holding member 2 is simultaneously subjected to force in the directions indicated by arrow AR10 and arrow AR11. That is, the lens holding member 2 is pressed from both sides by force, thereby suppressing the optical axis JD offset of the lens body or its tilt relative to the Z-axis.

[0151] Furthermore, the detection magnet 8 is positioned near one end of the first magnetic field generating member 5A. Therefore, the force acting on the detection magnet 8 strictly speaking has not only a component in the X-axis direction as indicated by arrow AR10, but also a component in the Y-axis direction. That is, the force acting on the detection magnet 8 is applied to the lens holding member 2 in the tangential direction of the circle centered on the optical axis JD. Similarly, the balancing magnet 9 is positioned near the other end of the second magnetic field generating member 5B. Therefore, the force acting on the balancing magnet 9 strictly speaking has not only a component in the X-axis direction as indicated by arrow AR11, but also a component in the Y-axis direction. That is, the force acting on the balancing magnet 9 is applied to the lens holding member 2 in the tangential direction of the circle centered on the optical axis JD. However, the two forces acting in the tangential direction only tend to rotate the lens holding member 2 about the optical axis JD, and therefore will not cause the optical axis JD of the lens body to deviate. Furthermore, the rotation of the lens holding member 2 about the optical axis JD is suppressed by the rigidity of the leaf spring, so that the two forces acting in the tangential direction will not cause the optical axis JD of the lens body to deviate.

[0152] For example, in Figures 16A to 16D In this configuration, assuming the upper portion of the detection magnet 8 is designated as the N pole and the lower portion as the S pole, an attractive force, rather than a repulsive force, is generated between the detection magnet 8 and the first magnetic field generating component 5A. In this case, the lens holding component 2 is subjected to the repulsive force generated between the balancing magnet 9 and the second magnetic field generating component 5B in the direction indicated by arrow AR11, and is subjected to the attractive force generated between the detection magnet 8 and the first magnetic field generating component 5A in the opposite direction to that indicated by arrow AR10, i.e., in the same direction as that indicated by arrow AR11. As a result, the lens holding component 2 is embodied, for example, in... Figure 16A The direction indicated by arrow AR11 shifts the optical axis JD, or for example, in Figure 16B The direction indicated by arrow AR16 indicates a tendency to tilt the optical axis JD. The above-described configuration of this embodiment can suppress such offset or tilting of the optical axis JD.

[0153] Next, refer to Figures 17A to 17D Another example of the configuration of the coil 3, magnetic field generating component 5, detection magnet 8, balancing magnet 9, and magnetic detection component 11 in the initial state will be described. Figures 17A to 17D This diagram shows another example of the configuration of coil 3, magnetic field generating component 5, detection magnet 8, balancing magnet 9, and magnetic detection component 11. Figures 16A to 16D correspond.

[0154] Figures 17A to 17D The drive mechanism MK shown has a detection magnet 8 configured with the upper part as the N pole and the lower part as the S pole, and a balancing magnet 9 configured with the upper part as the S pole and the lower part as the N pole. This is similar to... Figures 16A to 16D The drive mechanism MK differs, but they are common in other aspects. Therefore, the description of the common parts will be omitted below, and the differences will be explained in detail.

[0155] pass Figures 17A to 17D In the configuration shown, in the initial state, an attractive force is generated between the upper portion (N pole portion) of the detection magnet 8 and the inner portion (S pole portion) of the first upper magnet 5AU. Therefore, the lens holding member 2, which supports the detection magnet 8 and is a movable part, is directed towards... Figure 17B The force is applied in the direction indicated by arrow AR22. That is, the lens holding member 2 is attracted by the first magnetic field generating member 5A.

[0156] Furthermore, an attractive force is also generated between the lower portion (S pole portion) of the detection magnet 8 and the inner portion (N pole portion) of the first lower magnet 5AL. Therefore, the lens holding member 2 is directed towards... Figure 17B The force is applied in the direction indicated by arrow AR23, which is the same direction as that indicated by arrow AR22. That is, the lens holding member 2 is attracted by the first magnetic field generating member 5A.

[0157] On the other hand, an attractive force is also generated between the upper part (S pole part) of the balancing magnet 9 and the inner part (N pole part) of the second upper magnet 5BU. Therefore, the lens holding member 2 is directed towards Figure 17B The force is applied in the direction indicated by arrow AR24, which is opposite to the direction indicated by arrow AR22. That is, the lens holding member 2 is attracted by the second magnetic field generating member 5B.

[0158] Furthermore, an attractive force is also generated between the lower portion (N pole portion) of the balancing magnet 9 and the inner portion (S pole portion) of the second lower magnet 5BL. Therefore, the lens holding member 2 is directed towards... Figure 17B The force is applied in the direction indicated by arrow AR25, which is the same direction as that indicated by arrow AR24 but opposite to that indicated by arrow AR22. That is, the lens holding member 2 is attracted by the second magnetic field generating member 5B.

[0159] The result is, as Figure 17A As shown, the lens holding member 2 is simultaneously subjected to force in the directions indicated by arrow AR20 and arrow AR21. That is, the lens holding member 2 is pulled from both sides by force, thus suppressing the optical axis JD shift or tilting relative to the Z-axis of the lens body.

[0160] Next, refer to Figures 18A to 18D Another example of the configuration of the coil 3, magnetic field generating component 5, detection magnet 8, balancing magnet 9, and magnetic detection component 11 in the initial state will be described. Figures 18A to 18D This diagram shows another example of the configuration of coil 3, magnetic field generating component 5, detection magnet 8, balancing magnet 9, and magnetic detection component 11. Figures 17A to 17D correspond.

[0161] Figures 18A to 18D The drive mechanism MK shown omits the first lower magnet 5AL of the first magnetic field generating component 5A and the second lower magnet 5BL of the second magnetic field generating component 5B, which is different from the previous one. Figures 17A to 17D The drive mechanisms MK shown are different, but they are common in other aspects. Therefore, the description of the common parts will be omitted below, and the differences will be explained in detail.

[0162] pass Figures 18A to 18D In the configuration shown, in the initial state, an attractive force is generated between the upper portion (N pole portion) of the detection magnet 8 and the inner portion (S pole portion) of the first upper magnet 5AU, which serves as the first magnetic field generating member 5A. Therefore, the lens holding member 2, which supports the detection magnet 8 and is a movable part, is tilted towards... Figure 18B The force is applied in the direction indicated by arrow AR32. That is, the lens holding member 2 is attracted by the first magnetic field generating member 5A.

[0163] On the other hand, an attractive force is also generated between the upper part (S pole part) of the balancing magnet 9 and the inner part (N pole part) of the second upper magnet 5BU, which serves as the second magnetic field generating component 5B. Therefore, the lens holding component 2 is directed towards... Figure 18B The force is applied in the direction indicated by arrow AR33, which is opposite to the direction indicated by arrow AR32. That is, the lens holding member 2 is attracted by the second magnetic field generating member 5B.

[0164] The result is, as Figure 18A As shown, the lens holding member 2 is simultaneously subjected to force in the directions indicated by arrow AR30 and arrow AR31. That is, the lens holding member 2 is pulled from both sides by force, thus suppressing the optical axis JD shift or tilting relative to the Z-axis of the lens body.

[0165] Next, refer to Figure 19 The configuration of the gasket component 1, the magnetic field generating component 5, and the flexible printed circuit board 10 will be described. Figure 19 This is a perspective view of the gasket component 1, the magnetic field generating component 5, and the flexible printed circuit board 10. Additionally, for clarity, Figure 19 The upper leaf spring 16, which is actually disposed between the gasket component 1 and the magnetic field generating component 5, is omitted from the illustration.

[0166] The gasket component 1 is a component disposed inside the magnetic yoke 4 in such a way that it contacts the inner side (Z2 side) of the upper plate portion 4B of the magnetic yoke 4 (top surface), and has a frame-shaped portion FR.

[0167] The frame-shaped part FR is a rectangular ring-shaped component, having a first side part FR1 to a fourth side part FR4. The first side part FR1 is configured to face the first side plate part 4A1, the second side part FR2 is configured to face the second side plate part 4A2, the third side part FR3 is configured to face the third side plate part 4A3, and the fourth side part FR4 is configured to face the fourth side plate part 4A4.

[0168] Furthermore, the frame-shaped portion FR has a protrusion PR for positioning the magnetic field generating component 5. In this embodiment, the protrusion PR has a pair of first protrusions PR1 for positioning the first magnetic field generating component 5A, and a pair of second protrusions PR2 for positioning the second magnetic field generating component 5B.

[0169] A pair of first protrusions PR1 are formed to protrude from the end face of the first side portion FR1 on the Z2 side in the Z2 direction. Furthermore, the pair of first protrusions PR1 are arranged with a gap of approximately the same size as the width of the first magnetic field generating member 5A, so that the first magnetic field generating member 5A is disposed between them.

[0170] A pair of second protrusions PR2 are formed to protrude in the Z2 direction from the end face of the second side portion FR2 on the Z2 side. Furthermore, the pair of second protrusions PR2 are arranged with a gap of approximately the same size as the width of the second magnetic field generating component 5B, so that the second magnetic field generating component 5B is disposed between them.

[0171] Furthermore, the pair of first protrusions PR1 are configured to have a protrusion length H11 that is greater than the height H10 of the first upper magnet 5AU, so that the first upper magnet 5AU and the first lower magnet 5AL can be positioned simultaneously. In this embodiment, the pair of first protrusions PR1 are configured such that the protrusion length H11 is smaller than the height of the first magnetic field generating member 5A, but it can also be configured to be larger than the height of the first magnetic field generating member 5A. The same applies to the pair of second protrusions PR2.

[0172] Furthermore, the frame-shaped portion FR has an engaging portion EG for positioning the flexible printed circuit board 10 and a pair of protrusions PB including a tapered portion TP.

[0173] In this embodiment, the engaging portion EG is an engaging protrusion that protrudes in the Z2 direction from the end face of the fourth side portion FR4 on the Z2 side. Furthermore, the engaging portion EG is configured to engage with an engaging recess formed on the flexible printed circuit board 10 as an engaging portion 10R. Alternatively, the engaging portion EG may also be an engaging recess formed on the flexible printed circuit board 10 as an engaging protrusion 10R.

[0174] A pair of protrusions PB are formed to protrude from the end face of the fourth side FR4 in the Z2 direction. Furthermore, the pair of protrusions PB are configured such that tapered portions TP are arranged on both sides of the engaging portion EG.

[0175] The tapered portion TP is configured such that, with the gasket member 1 disposed within the magnetic yoke 4, the distance between the surface of the tapered portion TP and the surface of the fourth side plate portion 4A4 increases downward (in the Z2 direction).

[0176] With the above configuration, the flexible printed circuit board 10 is positioned by the engaging portion EG, and is fixed to the fourth side plate portion 4A4 by an adhesive or the like while sandwiched between the fourth side plate portion 4A4 and the tapered portion TP.

[0177] Next, refer to Figure 20A as well as Figure 20B The effects of the tapered portion TP are explained. Figure 20A as well as Figure 20B express Figure 19 The cross-sections of the spacer component 1, the magnetic yoke 4, and the flexible printed circuit board 10 in the imaginary plane SF1 are shown. Specifically, Figure 20A This indicates the state before the flexible printed circuit board 10 comes into contact with the inner wall (inner surface) of the fourth side plate portion 4A4 of the magnetic yoke 4. Figure 20B This indicates the state after the flexible printed circuit board 10 comes into contact with the inner wall of the fourth side plate portion 4A4.

[0178] During the assembly of the lens driving device 101, the flexible printed circuit board 10, as... Figure 20A As indicated by arrow AR40, it is inserted between the inner wall of the fourth side plate 4A4 and the outer wall EW of the protrusion PB in the gasket member 1, with the spaced apart from the inner wall of the fourth side plate 4A4.

[0179] At this time, the upper inner edge of the flexible printed circuit board 10 contacts the surface of the tapered portion TP and is guided by the surface of the tapered portion TP in the direction indicated by arrow AR40. Furthermore, the flexible printed circuit board 10 moves upward (in the Z1 direction) while pressing and spreading the adhesive (not shown) coated on the inner wall of the fourth side plate portion 4A4 through its outer surface.

[0180] After that, as Figure 20BAs shown, the flexible printed circuit board 10 is positioned such that its upper end face contacts the lower surface BS of the fourth side portion FR4 of the frame-shaped portion FR constituting the pad member 1. In this way, the flexible printed circuit board 10 achieves positioning in both the Y-axis and Z-axis directions.

[0181] In addition, such as Figure 19 As shown, the flexible printed circuit board 10 is positioned in the X-axis and Z-axis directions through the engaging part EG.

[0182] In this way, the tapered portion TP of the gasket member 1 can accurately position the flexible printed circuit board 10 at a predetermined position between the inner wall of the fourth side plate portion 4A4 and the outer wall EW of the protrusion PB. In addition, it is preferable to assemble the flexible printed circuit board 10 into the interior of the magnetic yoke 4 to which the gasket member 1 is fixed with the upper plate portion 4B of the magnetic yoke 4 facing the vertical direction.

[0183] As described above, the lens driving device 101 according to this embodiment includes: a frame (a magnetic yoke 4 as a cover member and a base member 18), having an outer peripheral wall portion 4A and an upper plate portion 4B, the outer peripheral wall portion 4A including a first side plate portion 4A1 and a second side plate portion 4A2 facing each other; a lens holding member 2, located in the frame and capable of holding the lens body; a coil 3, held in the lens holding member 2; a first magnetic field generating member 5A and a second magnetic field generating member 5B, facing each other across the coil 3 and the lens holding member 2; and a detection magnet 8, held in the lens. The system includes a holding member 2 for detecting the position of the lens holding member 2; a magnetic detection member 11, which is held opposite to the detection magnet 8 on the flexible printed circuit board 10, which serves as a fixed side member; a balancing magnet 9, which is held opposite to the detection magnet 8 across the optical axis JD of the lens body on the lens holding member 2; and lower leaf springs 26A (as a first leaf spring) and 26B (as a second leaf spring), which support the lens holding member 2 so that it can move along the optical axis and are respectively connected to one end and the other end of the wire constituting the coil 3. Furthermore, the detection magnet 8 is positioned closer to the first magnetic field generating member 5A than the second magnetic field generating member 5B, and the balancing magnet 9 is positioned closer to the second magnetic field generating member 5B than the first magnetic field generating member 5A.

[0184] With this configuration, the lens drive device 101 can increase design freedom. For example, the lens drive device 101 realizes feedback control of the movement of the lens holding member 2 in the optical axis direction related to the automatic focus adjustment function, and as... Figure 16AAs shown, a detection magnet 8 is disposed at one corner of the lens holding member 2, which has a roughly rectangular shape when viewed from above. Furthermore, a balancing magnet 9 is disposed at the other corner of the lens holding member 2. Therefore, the lens driving device 101 can reduce the size of the lens holding member 2 in the Y-axis direction, thereby achieving overall miniaturization of the device.

[0185] The first magnetic field generating component 5A is preferably as follows: Figure 18B As shown, the first inner portion (the portion on the X2 side of the first upper magnet 5AU) is located on the inner side (X2 side) opposite to the lens holding member 2. Furthermore, the second magnetic field generating member 5B has a second inner portion (the portion on the X1 side of the second upper magnet 5BU) located on the inner side (X1 side) opposite to the lens holding member 2.

[0186] In this case, the detection magnet 8 is configured to be positioned opposite the first magnetic field generating component 5A in a direction orthogonal to the optical axis, and the fifth part (upper part) on one side (Z1 side) of the optical axis and the sixth part (lower part) on the other side (Z2 side) have different magnetic poles.

[0187] Furthermore, the balancing magnet 9 is configured to be positioned opposite the second magnetic field generating component 5B in a direction orthogonal to the optical axis, and the 7th part (upper part) on one side (Z1 side) of the optical axis and the 8th part (lower part) on the other side (Z2 side) have different magnetic poles.

[0188] Furthermore, the lens driving device 101 is configured to exert an attractive force between the first inner portion and the fifth portion and between the second inner portion and the seventh portion. Alternatively, the lens driving device 101 is configured to exert a repulsive force between the first inner portion and the fifth portion and between the second inner portion and the seventh portion.

[0189] For example, such as Figure 18B As shown, the lens driving device 101 is configured to exert an attractive force between the X2 side portion (S pole portion) of the first upper magnet 5AU and the upper portion (N pole portion) of the detection magnet 8, and between the X1 side portion (N pole portion) of the second upper magnet 5BU and the upper portion (S pole portion) of the balancing magnet 9.

[0190] With this configuration, the lens driving device 101 can generate an attractive force between the first upper magnet 5AU and the detection magnet 8, and an attractive force between the second upper magnet 5BU and the balancing magnet 9. Therefore, the lens driving device 101 can stabilize the posture of the lens holding member 2.

[0191] like Figure 16BAs shown, the first magnetic field generating component 5A can also be configured such that, on the inner side (X2 side) opposite to the lens holding component 2, there is a first inner portion on one side (Z1 side) having the optical axis direction (the portion on the X2 side of the first upper magnet 5AU) and a third inner portion on the other side (Z2 side) (the portion on the X2 side of the first lower magnet 5AL). Furthermore, the second magnetic field generating component 5B can also be configured such that, on the inner side (X1 side) opposite to the lens holding component 2, there is a second inner portion on one side having the optical axis direction (the portion on the X1 side of the second upper magnet 5BU) and a fourth inner portion on the other side (the portion on the X1 side of the second lower magnet 5BL).

[0192] And, as Figure 16B As shown, the lens driving device 101 can also be configured such that the first inner portion (the portion on the X2 side of the first upper magnet 5AU) and the third inner portion (the portion on the X2 side of the first lower magnet 5AL) have different magnetic poles, and the second inner portion (the portion on the X1 side of the second upper magnet 5BU) and the fourth inner portion (the portion on the X1 side of the second lower magnet 5BL) have different magnetic poles.

[0193] In this case, the lens driving device 101 is preferably configured to exert an attractive force between the first inner portion and the fifth portion, between the third inner portion and the sixth portion, between the second inner portion and the seventh portion, and between the fourth inner portion and the eighth portion. Alternatively, the lens driving device 101 is preferably configured to exert a repulsive force between the first inner portion and the fifth portion, between the third inner portion and the sixth portion, between the second inner portion and the seventh portion, and between the fourth inner portion and the eighth portion.

[0194] For example, such as Figure 16B As shown, the lens driving device 101 can also be configured such that a repulsive force acts between the X2 side portion (S pole portion) of the first upper magnet 5AU and the upper portion (S pole portion) of the detection magnet 8, between the X2 side portion (N pole portion) of the first lower magnet 5AL and the lower portion (N pole portion) of the detection magnet 8, between the X1 side portion (N pole portion) of the second upper magnet 5BU and the upper portion (N pole portion) of the balancing magnet 9, and between the X1 side portion (S pole portion) of the second lower magnet 5BL and the lower portion (S pole portion) of the balancing magnet 9.

[0195] With this configuration, the lens driving device 101 can generate a repulsive force between the first upper magnet 5AU and the first lower magnet 5AL and the detection magnet 8, and a repulsive force between the second upper magnet 5BU and the second lower magnet 5BL and the balancing magnet 9. Therefore, the lens driving device 101 can press the lens holding member 2 from both sides, thus stabilizing the posture of the lens holding member 2 compared to pulling from one side and pressing from the other. That is, the lens driving device 101 can suppress or prevent the central axis (optical axis JD of the lens body) of the lens holding member 2 from shifting or tilting relative to the Z-axis.

[0196] Or, such as Figure 17B As shown, the lens driving device 101 can also be configured to exert attractive forces between the X2 side portion (S pole portion) of the first upper magnet 5AU and the upper portion (N pole portion) of the detection magnet 8, between the X2 side portion (N pole portion) of the first lower magnet 5AL and the lower portion (S pole portion) of the detection magnet 8, between the X1 side portion (N pole portion) of the second upper magnet 5BU and the upper portion (S pole portion) of the balancing magnet 9, and between the X1 side portion (S pole portion) of the second lower magnet 5BL and the lower portion (N pole portion) of the balancing magnet 9.

[0197] With this configuration, the lens driving device 101 can generate an attractive force between the first upper magnet 5AU and the first lower magnet 5AL and the detection magnet 8, and an attractive force between the second upper magnet 5BU and the second lower magnet 5BL and the balancing magnet 9. Therefore, the lens driving device 101 can pull the lens holding member 2 from both sides, thus stabilizing the posture of the lens holding member 2 compared to pulling from one side and pressing from the other. That is, the lens driving device 101 can suppress or prevent the central axis (optical axis JD of the lens body) of the lens holding member 2 from shifting or tilting relative to the Z-axis.

[0198] The lens driving device 101 is preferably configured such that an attractive force is generated between the detection magnet 8 and the first magnetic field generating component 5A, and an attractive force is generated between the balancing magnet 9 and the second magnetic field generating component 5B.

[0199] With this configuration, the lens driving device 101 can make the posture of the lens holding member 2 more stable compared to the case where a repulsive force is applied. This is because when a repulsive force is applied to both sides of the lens holding member 2, compared to the case where an attractive force is applied to both sides of the lens holding member 2, these two repulsive forces make it easier for the lens holding member 2 to move laterally (in the direction perpendicular to the optical axis JD). That is, this is because when an attractive force is applied to both sides of the lens holding member 2, compared to the case where a repulsive force is applied to both sides of the lens holding member 2, the lateral rigidity of the lower leaf spring 26 makes it easier to suppress the lateral movement of the lens holding member 2.

[0200] The lens driving device 101 may be configured such that the magnetic poles of the first inner part (the part on the X2 side of the first upper magnet 5AU) and the magnetic poles of the second inner part (the part on the X1 side of the second upper magnet 5BU) are opposite poles, and the magnetic poles of the fifth part (the upper part of the detection magnet 8) and the magnetic poles of the seventh part (the upper part of the balancing magnet 9) are opposite poles.

[0201] Specifically, for example, such as Figure 16B As shown, the lens driving device 101 can also be configured such that the magnetic pole (S pole) of the X2 side portion of the first upper magnet 5AU and the magnetic pole (N pole) of the X1 side portion of the second upper magnet 5BU are opposite poles, and the magnetic pole (S pole) of the upper portion of the detection magnet 8 and the magnetic pole (N pole) of the upper portion of the balancing magnet 9 are opposite poles.

[0202] like Figure 5B As shown, the preferred coil 3 is disposed on two opposing outer surfaces of the lens holding member 2, and has two winding portions 13 wound around a winding protrusion 12p protruding in a direction orthogonal to the optical axis. Furthermore, as... Figure 16A As shown, one of the two winding portions 13 is opposite to the first magnetic field generating component 5A, and the other is opposite to the second magnetic field generating component 5B.

[0203] In this case, the first magnetic field generating member 5A has: a first outer portion (the portion on the X2 side of the first upper magnet 5AU) disposed outside the first inner portion (the portion on the X2 side of the first upper magnet 5AU) in a direction orthogonal to the optical axis; and a third outer portion (the portion on the X1 side of the first lower magnet 5AL) disposed outside the third inner portion (the portion on the X2 side of the first lower magnet 5AL) in a direction orthogonal to the optical axis. The second magnetic field generating member 5B has: a second outer portion (the portion on the X2 side of the second upper magnet 5BU) disposed outside the second inner portion (the portion on the X1 side of the second upper magnet 5BU) in a direction orthogonal to the optical axis; and a fourth outer portion (the portion on the X2 side of the second lower magnet 5BL) disposed outside the fourth inner portion (the portion on the X1 side of the second lower magnet 5BL) in a direction orthogonal to the optical axis.

[0204] Furthermore, the first inner portion and the first outer portion are composed of a first magnet (first upper magnet 5AU) and have different magnetic poles; the second inner portion and the second outer portion are composed of a second magnet (second upper magnet 5BU) and have different magnetic poles; the third inner portion and the third outer portion are composed of a third magnet (first lower magnet 5AL) and have different magnetic poles; and the fourth inner portion and the fourth outer portion are composed of a fourth magnet (second lower magnet 5BL) and have different magnetic poles.

[0205] Furthermore, the first magnet (first upper magnet 5AU) and the third magnet (first lower magnet 5AL) overlap vertically in the optical axis direction, and the second magnet (second upper magnet 5BU) and the fourth magnet (second lower magnet 5BL) also overlap vertically in the optical axis direction.

[0206] With this configuration, the first magnetic field generating component 5A can increase the magnetic force compared to the case where it is composed of a quadrupole magnet. The same applies to the second magnetic field generating component 5B.

[0207] The detection magnet 8 is preferably disposed between one end and the other end of the first magnetic field generating member 5A in the optical axis direction. Furthermore, the balancing magnet 9 is disposed between one end and the other end of the second magnetic field generating member 5B in the optical axis direction. For example, as... Figure 16B As shown, the detection magnet 8 is configured such that its vertical width H1 converges within the vertical width H3 of the first magnetic field generating component 5A. The same applies to the balancing magnet 9.

[0208] With this configuration, the lens driving device 101 can easily achieve a balance of magnetic forces acting on both sides of the lens holding member 2 in a direction perpendicular to the optical axis. Furthermore, the lens driving device 101 can reduce the overall vertical width of the device in the optical axis direction.

[0209] The coil 3 preferably has a first extension 33A constituting one end of the coil 3 and a second extension 33B constituting the other end. In this case, the lens holding member 2 has a first holding portion 72A for holding the first extension 33A and a second holding portion 72B for holding the second extension 33B.

[0210] For example, such as Figure 10A As shown, the first extension 33A is connected to the lower leaf spring 26A using the first bonding material AD1 (conductive adhesive or solder), and the second extension 33B is connected to the lower leaf spring 26B using the second bonding material AD2 (conductive adhesive or solder).

[0211] Furthermore, the first magnetic field generating component 5A is fixed to the first side plate 4A1, and the second magnetic field generating component 5B is fixed to the second side plate 4A2.

[0212] In this case, such as Figure 10A As shown, the detection magnet 8 is positioned on the side opposite to the side where the second holding portion 72B and the second bonding material AD2 are located, separated by the first imaginary line VL1, and on the side opposite to the side where the first holding portion 72A and the first bonding material AD1 are located, separated by the second imaginary line VL2. Furthermore, the balancing magnet 9 is positioned on the side opposite to the side where the first holding portion 72A and the first bonding material AD1 are located, separated by the first imaginary line VL1, and on the side opposite to the side where the second holding portion 72B and the second bonding material AD2 are located, separated by the second imaginary line VL2. The first imaginary line VL1 is substantially parallel to the first side plate portion 4A1 and the second side plate portion 4A2, and passes through the optical axis JD and is substantially perpendicular to the optical axis JD. The second imaginary line VL2 is orthogonal to the first imaginary line VL1, and passes through the optical axis JD and is substantially perpendicular to the optical axis JD. in addition, Figure 10A The positions of the detection magnet 8 and the balancing magnet 9, which are not actually visible due to their presence on the upper side (Z1 side) of the lens holding component, are indicated by dashed lines and dotted shading.

[0213] With this configuration, the lens drive device 101 can achieve a state in which the detection magnet 8, the balancing magnet 9, the first bonding material AD1, and the second bonding material AD2 are configured with good balance relative to the optical axis JD.

[0214] The frame of the lens driving device 101 is preferably as follows: Figure 1 as well as Figure 2A As shown, the device includes a magnetic yoke 4 as a cover member, having an outer peripheral wall portion 4A and an upper plate portion 4B, and a base member 18 opposite to the upper plate portion 4B. Furthermore, as... Figures 15A to 15DAs shown, a first metal component 7A electrically connected to one end of the coil 3 via a lower leaf spring 26A and a second metal component 7B electrically connected to the other end of the coil 3 via a lower leaf spring 26B are embedded in the base component 18.

[0215] In addition, such as Figure 2B As shown, the connecting portion 7AC of the first metal component 7A exposed from the outer peripheral side of the base component 18 is connected to the first conductive portion 10C1 via a conductive bonding material AD when facing one of the two conductive portions 10C formed on the flexible printed circuit board 10 on which the magnetic detection component 11 is mounted. Similarly, the connecting portion 7BC of the second metal component 7B exposed from the outer peripheral side of the base component 18 is connected to the second conductive portion 10C2 via a conductive bonding material AD when facing the other of the two conductive portions 10C, namely the second conductive portion 10C2.

[0216] With this configuration, the lens driving device 101 can bring the surface of the connecting portion 7AC extending in the optical axis direction into contact with the surface of the first conductive portion 10C1 extending in the optical axis direction, thereby increasing the contact area between the connecting portion 7AC and the first conductive portion 10C1. Furthermore, the lens driving device 101 can easily bring the electroplated surface of the connecting portion 7AC into contact with the surface of the first conductive portion 10C1 extending in the optical axis direction.

[0217] Furthermore, the lens driving device 101, for example, improves productivity (assembly capability) compared to a configuration that achieves electrical connection between the flexible printed circuit board 10 and the lower leaf spring 26 by inserting a portion of the lower leaf spring 26 into a hole formed in the flexible printed circuit board 10. This is because, for example, it can also be used with... Figure 20A as well as Figure 20B The assembly method of the lens driving device 101 shown corresponds to the assembly method that includes the process of inserting the flexible printed circuit board 10 between the inner wall of the fourth side plate portion 4A4 and the outer wall EW of the protrusion PB in the gasket member 1.

[0218] In this embodiment, the outer peripheral wall portion 4A of the magnetic yoke 4 has a third side plate portion 4A3 and a fourth side plate portion 4A4 that are substantially perpendicular to the first side plate portion 4A1 and the second side plate portion 4A2. Furthermore, a [missing information - likely a typo, should be inserted here] is disposed inside the upper plate portion 4B of the magnetic yoke 4. Figure 19The pad component 1 shown has a frame-shaped portion FR. In the frame-shaped portion FR, the portion opposite the fourth side plate portion 4A4, i.e., the fourth edge portion FR4, has an engaging portion EG that can engage with the flexible printed circuit board 10, and a tapered portion TP whose distance (gap, distance) from the fourth side plate portion 4A4 increases as it moves away from the upper plate portion 4B. In this configuration, the flexible printed circuit board 10 is positioned by the engaging portion EG and fixed to the fourth side plate portion 4A4 while being sandwiched between the fourth side plate portion 4A4 and the tapered portion TP.

[0219] With this configuration, the lens driving device 101 can reliably position the flexible printed circuit board 10 between the fourth side plate portion 4A4 and the tapered portion TP via the tapered portion TP of the pad member 1, and position the flexible printed circuit board 10 via the engaging portion EG. Therefore, it is possible to suppress the positional deviations of the detection magnet 8 and the magnetic detection member 11, as well as the deviations in the distance between the detection magnet 8 and the magnetic detection member 11, and improve the detection accuracy of the magnetic detection member 11 (Hall element).

[0220] In this embodiment, such as Figure 19 As shown, in the frame-shaped portion FR, the portion opposite the first side plate portion 4A1, i.e., the first side portion FR1, has a pair of separate first protrusions PR1 that protrude in a direction away from the upper plate portion 4B. Similarly, in the frame-shaped portion FR, the portion opposite the second side plate portion 4A2, i.e., the second side portion FR2, also has a pair of separate second protrusions PR2 that protrude in a direction away from the upper plate portion 4B. Furthermore, a first magnetic field generating member 5A is disposed between the pair of first protrusions PR1, and a second magnetic field generating member 5B is disposed between the pair of second protrusions PR2.

[0221] With this configuration, the lens drive device 101 can properly position the first magnetic field generating component 5A by means of a pair of first protrusions PR1, even when the first magnetic field generating component 5A is composed of multiple magnets.

[0222] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described above. Various modifications and substitutions can be applied to the above embodiments without departing from the scope of the present invention. Furthermore, the various features described with reference to the above embodiments can be appropriately combined as long as they are not technically contradictory.

[0223] For example, in the above-described embodiment that implements the automatic focus adjustment function, the lower leaf spring 26A is electrically connected to the first extension 33A, and the lower leaf spring 26B is electrically connected to the second extension 33B. However, the present invention is not limited to this configuration. The present invention may also include, for example, a configuration in which, in a lens drive device with jitter correction function, the upper leaf spring 16 is divided into two, one electrically connected to the first extension 33A, and the other electrically connected to the second extension 33B. In this configuration, the upper leaf spring 16 is configured to connect a magnet holder, which serves as a support member, to a lens holding member 2, and supports the lens holding member 2 so that it can move along the optical axis. The magnet holder is a component that holds a magnetic field generating member 5 opposite to the coil 3 held in the lens holding member 2. Typically, it is connected to the base member 18 via a suspension wire and supported by the suspension wire so that it can move in a direction perpendicular to the optical axis. Specifically, the magnet retaining structure is designed to move in a direction perpendicular to the optical axis via a drive mechanism consisting of a magnetic field generating component 5 and a coil different from the coil 3, which is mounted on the base component 18 opposite to the magnetic field generating component 5. In this case, the retaining portion 72, which is a protrusion, may also be provided at the upper end of the lens retaining component 2 on the side where the upper leaf spring 16 is disposed. Furthermore, the magnetic detection component 11 is preferably held in the magnet retaining frame.

[0224] Furthermore, in the above embodiment, the coil 3 is composed of two elliptical (oval-shaped) coils, each having a coil axis perpendicular to the optical axis, held on two of the four sides of the lens holding member 2. However, the present invention is not limited to this configuration. The coil 3 may also be a loop coil wound around the lens holding member 2 with a coil axis extending along the optical axis.

[0225] Furthermore, in the above embodiment, the first magnetic field generating component 5A is constituted by a combination of a first upper magnet 5AU and a first lower magnet 5AL, which are magnetized in a direction perpendicular to the optical axis JD. However, it can also be constituted by a single diode magnetized along the optical axis. In this case, the upper portion of the diode corresponds to the inner portion of the first upper magnet 5AU, and its lower portion corresponds to the inner portion of the first lower magnet 5AL. The same applies to the second magnetic field generating component 5B.

[0226] Furthermore, in the above embodiment, the detection magnet 8 and the balancing magnet 9 are installed with their magnetic poles arranged (magnetization directions) opposite to each other in the optical axis direction, i.e., the vertical direction. However, they can also be installed with their magnetic poles arranged in the same way in the optical axis direction, i.e., the vertical direction. In this case, for example, the winding direction of the winding portion 13 of the second coil 3B is opposite to the winding direction in the above embodiment, and the magnetic pole arrangement (magnetization direction) of the second magnetic field generating component 5B is opposite to the magnetic pole arrangement (magnetization direction) in the above embodiment.

[0227] Furthermore, in the above embodiment, the magnetic detection component 11 is composed of an electronic component that incorporates a Hall element and a driver IC. However, it may also be composed of a magnetic detection element such as a Hall element or a magnetoresistive element, without the driver IC. In this case, the magnetic detection component outputs a detection signal to a control unit located outside the lens driving device 101. The control unit then controls the current supplied from the control unit to the coil 3 based on the detection signal.

[0228] This application claims priority based on Japanese Patent Application No. 2018-234430, filed on December 14, 2018, the entire contents of which are incorporated herein by reference.

[0229] Symbol explanation:

[0230] 1: Gasket component; 2: Lens holding component; 2t: Protrusion; 3: Coil; 3A: First coil; 3B: Second coil; 3C: Connecting part; 4: Magnetic yoke; 4A: Outer peripheral wall part; 4A1: First side plate part; 4A2: Second side plate part; 4A3: Third side plate part; 4A4: Fourth side plate part; 4B: Upper plate part; 4s: Storage part; 5: Magnetic field generating component; 5A: First magnetic field generating component; 5AU: First upper magnet; 5AL: First lower magnet; 5B: Second magnetic field generating component; 5BU: Second upper magnet; 5BL: Second lower magnet; 6: Leaf spring; 7: Metal component; 7A: First metal component; 7AC: Connecting part; 7AP: Contact part; 7B: Second metal component; 7BC: Connection 7BP: Contact part; 7C: Third metal part; 7CR: End; 7CT: Protrusion; 7D: Fourth metal part; 7DR: End; 7E: Fifth metal part; 7ER1, 7ER2: Ends; 8: Detection magnet; 9: Balancing magnet; 10: Flexible printed circuit board; 10C: Conductive part; 10C1: First conductive part; 10C2: Second conductive part; 10L1: Inner pattern layer; 10L2: Outer pattern layer; 10R: Engaging part; 11: Magnetic detection component; 12: Cylindrical part; 12d: Base part; 12dh: Recess; 12p: Winding protrusion; 12pA: First winding protrusion; 12pB: Second winding protrusion; 13: Winding part; 14: Capacitor; 16: Upper leaf spring; 16b: Corner portion; 16e: Outer portion; 16g: Elastic arm portion; 16i: Inner portion; 16r: Beam portion; 18: Base component; 18k: Opening; 18t: Protrusion; 26, 26A, 26B: Lower leaf spring; 26c: Inner joining portion; 26d: Outer joining portion; 26e: Outer portion; 26g: Elastic arm portion; 26h: Connecting plate portion; 26i: Inner portion; 26p: First connecting portion; 26q: Second connecting portion; 33: Extension portion; 33A: First extension portion; 33B: Second extension portion; 33c: First opposing portion; 33k: Second opposing portion; 33m: Winding portion; 72: Holding portion; 72A: First holding portion; 72B: Second holding portion; 82: Protrusion portion; 8 2s: Reception section; 82u: Inner wall section; 82v: Outer wall section; 82w: Side wall section; 82z: Open section; 101: Lens driving device; AD: Conductive bonding material; AD1: First bonding material; AD2: Second bonding material; BS: Lower surface; CA: Conductive adhesive; EG: Engaging section; EW: Outer wall; FR: Frame-shaped section; FR1: First side section; FR2: Second side section; FR3: Third side section; FR4: Fourth side section; LD1: First pad section; LD2: Second pad section; LD3: Third pad section; LD4: Fourth pad section; LD5: Fifth pad section; LD6: Sixth pad section; LD7: Seventh pad section; LD8: Eighth pad section; MK: Drive mechanism; PB: Protrusion;PR: Protrusion; PR1: First protrusion; PR2: Second protrusion; PT1: First pattern section; PT2: Second pattern section; PT3: Third pattern section; PT4: Fourth pattern section; RG: Fixed side component; T1: First terminal section; T2: Second terminal section; T3: Third terminal section; T4: Fourth terminal section; TP: Tapered section; V1~V9: Through hole; VL1: First imaginary line; VL2: Second imaginary line.

Claims

1. A lens driving device, comprising: The frame has an outer peripheral wall portion and an upper plate portion, the outer peripheral wall portion including a first side plate portion and a second side plate portion that are opposite to each other; The lens holding component, located within the aforementioned frame, is capable of holding the lens body; The coil is held in the lens holding component described above; The first magnetic field generating component and the second magnetic field generating component are positioned opposite each other, separated by the aforementioned coil and the aforementioned lens holding component; A detection magnet is held in the lens holding member to detect the position of the lens holding member. The magnetic detection component is configured to face the aforementioned detection magnet; A balancing magnet is held in the lens holding member at a position opposite to the detection magnet, separated from the optical axis of the lens body; and The first and second leaf springs support the lens holding member so that it can move along the optical axis and are respectively connected to one end and the other end of the wire constituting the coil. The lens driving device is characterized by the following features: The aforementioned detection magnet is positioned closer to the aforementioned first magnetic field generating component than to the aforementioned second magnetic field generating component. The aforementioned balancing magnet is positioned closer to the aforementioned second magnetic field generating component than to the aforementioned first magnetic field generating component. The first magnetic field generating component has a first inner portion on the inner side opposite to the lens holding component. The second magnetic field generating component has a second inner portion on the inner side opposite to the lens holding component. The aforementioned detection magnet is configured to correspond to the first magnetic field generating component in a direction orthogonal to the optical axis, and the fifth portion on one side of the optical axis and the sixth portion on the other side have different magnetic poles. The aforementioned balancing magnets are configured to correspond to the second magnetic field generating component in a direction orthogonal to the optical axis, and the seventh portion on one side of the optical axis and the eighth portion on the other side have different magnetic poles. An attractive force exists between the first inner portion and the fifth portion, and between the second inner portion and the seventh portion; or, a repulsive force exists between the first inner portion and the fifth portion, and between the second inner portion and the seventh portion. The first magnetic field generating component, located inside the lens holding component, has a first inner portion on one side along the optical axis and a third inner portion on the other side. The second magnetic field generating component, located inside the lens holding component, has a second inner portion on one side along the optical axis and a fourth inner portion on the other side. The first inner portion and the third inner portion have different magnetic poles. The second inner portion and the fourth inner portion described above have different magnetic poles. An attractive force exists between the first inner portion and the fifth portion, between the third inner portion and the sixth portion, between the second inner portion and the seventh portion, and between the fourth inner portion and the eighth portion. Repulsive forces act between the first inner portion and the fifth portion, between the third inner portion and the sixth portion, between the second inner portion and the seventh portion, and between the fourth inner portion and the eighth portion.

2. The lens driving device according to claim 1, wherein, The aforementioned coils are disposed on two opposing outer surfaces of the lens holding member, and have two winding portions wound around a winding protrusion protruding in a direction orthogonal to the optical axis. One of the aforementioned winding portions is opposite to the first magnetic field generating component, and the other is opposite to the second magnetic field generating component. The first magnetic field generating component described above has a first outer portion disposed outside the first inner portion in a direction orthogonal to the optical axis, and a third outer portion disposed outside the third inner portion in a direction orthogonal to the optical axis. The second magnetic field generating component described above has a second outer portion disposed outside the second inner portion in a direction orthogonal to the optical axis, and a fourth outer portion disposed outside the fourth inner portion in a direction orthogonal to the optical axis. The aforementioned first inner portion and the aforementioned first outer portion are both composed of a first magnet and have different magnetic poles. The aforementioned second inner portion and the aforementioned second outer portion are both composed of a second magnet and have different magnetic poles. The aforementioned third inner portion and the aforementioned third outer portion are both composed of a third magnet and have different magnetic poles. The aforementioned fourth inner portion and the aforementioned fourth outer portion are composed of the fourth magnet and have different magnetic poles.

3. The lens driving device according to claim 1 or 2, wherein, An attractive force exists between the aforementioned detection magnet and the aforementioned first magnetic field generating component, and an attractive force also exists between the aforementioned balancing magnet and the aforementioned second magnetic field generating component.

4. A lens driving device, comprising: The frame has an outer peripheral wall portion and an upper plate portion, the outer peripheral wall portion including a first side plate portion and a second side plate portion that are opposite to each other; The lens holding component, located within the aforementioned frame, is capable of holding the lens body; The coil is held in the lens holding component described above; The first magnetic field generating component and the second magnetic field generating component are positioned opposite each other, separated by the aforementioned coil and the aforementioned lens holding component; A detection magnet is held in the lens holding member to detect the position of the lens holding member. The magnetic detection component is configured to face the aforementioned detection magnet; A balancing magnet is held in the lens holding member at a position opposite to the detection magnet, separated from the optical axis of the lens body; and The first and second leaf springs support the lens holding member so that it can move along the optical axis and are respectively connected to one end and the other end of the wire constituting the coil. The lens driving device is characterized by the following features: The aforementioned detection magnet is positioned closer to the aforementioned first magnetic field generating component than to the aforementioned second magnetic field generating component. The aforementioned balancing magnet is positioned closer to the aforementioned second magnetic field generating component than to the aforementioned first magnetic field generating component. The first magnetic field generating component has a first inner portion on the inner side opposite to the lens holding component. The second magnetic field generating component has a second inner portion on the inner side opposite to the lens holding component. The aforementioned detection magnet is configured to correspond to the first magnetic field generating component in a direction orthogonal to the optical axis, and the fifth portion on one side of the optical axis and the sixth portion on the other side have different magnetic poles. The aforementioned balancing magnets are configured to correspond to the second magnetic field generating component in a direction orthogonal to the optical axis, and the seventh portion on one side of the optical axis and the eighth portion on the other side have different magnetic poles. An attractive force exists between the first inner portion and the fifth portion, and between the second inner portion and the seventh portion; or, a repulsive force exists between the first inner portion and the fifth portion, and between the second inner portion and the seventh portion. An attractive force exists between the aforementioned detection magnet and the aforementioned first magnetic field generating component, and an attractive force also exists between the aforementioned balancing magnet and the aforementioned second magnetic field generating component. The magnetic poles of the first inner portion and the second inner portion are opposite poles, and the magnetic poles of the fifth portion and the seventh portion are opposite poles.

5. The lens driving device according to claim 1 or 2, wherein, In the direction of the optical axis, the detection magnet is disposed between one end and the other end of the first magnetic field generating component, and the balancing magnet is disposed between one end and the other end of the second magnetic field generating component.

6. The lens driving device according to claim 1 or 2, wherein, The coil described above has a first extension forming one end of the coil and a second extension forming the other end. The lens holding member described above has a first holding portion for holding the first extension and a second holding portion for holding the second extension. The first extension is connected to the first leaf spring via a first connecting material, and the second extension is connected to the second leaf spring via a second connecting material. The first magnetic field generating component is fixed to the first side plate. The second magnetic field generating component is fixed to the second side plate. The aforementioned detection magnet is positioned on a side opposite to the side where the second holding portion and the second bonding material are located, separated by a first imaginary line that is substantially parallel to the first side plate portion and the second side plate portion and passes through the optical axis and is substantially perpendicular to the optical axis. It is also positioned on a side opposite to the side where the first holding portion and the first bonding material are located, separated by a second imaginary line that is orthogonal to the first imaginary line and passes through the optical axis and is substantially perpendicular to the optical axis. The balancing magnet is positioned on the side opposite to the side where the first holding part and the first bonding material are located, separated by the first imaginary line, and on the side opposite to the side where the second holding part and the second bonding material are located, separated by the second imaginary line.

7. The lens driving device according to claim 1 or 2, wherein, The aforementioned frame includes a cover member having the aforementioned outer peripheral wall portion and the aforementioned upper plate portion, and a base member opposite to the aforementioned upper plate portion. The base component is embedded with a first metal component electrically connected to one end of the coil via the first leaf spring, and a second metal component electrically connected to the other end of the coil via the second leaf spring. The connecting portion of the first metal component exposed from the outer peripheral side of the base component is connected to the first conductive portion by a conductive bonding material when facing one of the two conductive portions formed on the substrate on which the magnetic detection component is mounted. The connecting portion of the second metal component exposed from the outer peripheral side of the base component is connected to the second conductive portion by a conductive bonding material when facing the other of the two conductive portions, namely the second conductive portion.

8. The lens driving device according to claim 7, wherein, The outer peripheral wall portion of the aforementioned cover component has a third side plate portion and a fourth side plate portion that are substantially perpendicular to the first side plate portion and the second side plate portion and are opposed to each other. A gasket member with a frame-shaped portion is disposed on the upper plate portion of the aforementioned cover member. In the frame-shaped portion opposite to the fourth side plate portion, there is a locking portion that can engage with the substrate, and a tapered portion whose distance from the fourth side plate portion increases as it moves away from the upper plate portion. The substrate is positioned by the engagement portion and fixed to the fourth side plate portion while being sandwiched between the fourth side plate portion and the tapered portion.

9. The lens driving device according to claim 8, wherein, In the portion of the frame-shaped portion opposite to the first side plate portion, a pair of separate first protrusions are formed in a manner that protrudes away from the upper plate portion. In the portion of the frame-shaped portion opposite to the second side plate portion, a pair of separate second protrusions are formed in a manner that protrudes away from the upper plate portion. The first magnetic field generating component is disposed between the pair of first protrusions. The second magnetic field generating component is disposed between the pair of second protrusions.

10. A camera module having: The lens driving device according to any one of claims 1 to 9; The aforementioned lens body; and An imaging element opposite to the aforementioned lens.

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