CN116601565A

CN116601565A - Lens driving device and camera module

Info

Publication number: CN116601565A
Application number: CN202180084699.2A
Authority: CN
Inventors: 长田宽志; 前田征宣; 王长兴
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2020-12-17
Filing date: 2021-12-09
Publication date: 2023-08-15
Also published as: WO2022131119A1; JPWO2022131119A1; JP7434608B2

Abstract

A lens holding member (2) of a lens driving device (101) has a cylindrical portion (12) that extends in the vertical direction as the optical axis direction and on the inside of which a lens body (LS) can be disposed. A Parting Line (PL) which is a seam of a mold at the time of molding the lens holding member (2) is formed on the inner Surface (SF) of the tubular portion (12) at the center of the tubular portion (12) in the optical axis direction. The inner Surface (SF) includes an upper inner surface (USF) at an upper side of the Parting Line (PL) and a lower inner surface (LSF) at a lower side of the Parting Line (PL). An accommodating recess (SR) capable of accommodating the adhesive is formed on the upper inner surface (USF) and the lower inner surface (LSF). The shape of the accommodating recess (SR) is engaged with the shape of the cured adhesive (HA) accommodated in the accommodating recess (SR) to limit the relative movement in the up-down direction between the lens body (LS) and the lens holding member (2).

Description

Lens driving device and camera module

Technical Field

The present disclosure relates to a lens driving device mounted in, for example, a portable device with a camera or the like.

Background

Conventionally, a camera module including a base, a lens holder, and a leaf spring connecting the base and the lens holder is known (see patent document 1).

In the camera module, a spiral groove is formed on an upper portion of an inner peripheral surface of the lens holder so as to firmly adhere the inner peripheral surface of the lens holder and an outer peripheral surface of the lens barrel by an adhesive.

Prior art literature

Patent literature

Patent document 1: international publication No. 2014/122849

Disclosure of Invention

Technical problem to be solved by the invention

However, in the camera module described above, if a strong impact is applied due to dropping or the like, the adhesive located in the spiral groove may be peeled off from the lens holder and may rotate along the spiral groove together with the lens barrel.

Accordingly, it is desirable to provide a lens driving device including a lens holding member capable of holding a lens body such as a lens barrel more firmly.

Means for solving the technical problems

A lens driving device according to an embodiment of the present invention includes: a fixed side member including a housing; a lens holding member disposed in the housing and configured to hold a lens body; and a driving mechanism for moving the lens holding member relative to the fixed-side member; in the lens driving device, the lens body is fixed to the lens holding member by an adhesive; the lens holding member has a cylindrical portion extending in a vertical direction as an optical axis direction and capable of disposing the lens body inside; a parting line as a seam of a mold for molding the lens holding member is formed in a central portion of the cylindrical portion in the optical axis direction on an inner surface of the cylindrical portion; a receiving recess capable of receiving the adhesive is formed in an upper inner surface of the cylindrical portion located above the parting line and a lower inner surface of the cylindrical portion located below the parting line; the shape of the receiving recess is engaged with the shape of the adhesive received in the receiving recess to restrict movement of the lens body in the up-down direction relative to the lens holding member.

Effects of the invention

The lens holding member in the lens driving device described above can hold the lens body more firmly.

Drawings

Fig. 1A is an upper perspective view of the lens driving device.

Fig. 1B is an upper perspective view of the lens body.

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

Fig. 3A is an upper perspective view of the lens driving device.

Fig. 3B is a front view of the lens driving apparatus.

Fig. 4A is a top view of the lens driving device.

Fig. 4B is a bottom view of the lens driving device.

Fig. 5A is an upper perspective view of the lens driving device in a state where the lens body, the spacer, and the housing member are removed.

Fig. 5B is a front view of the lens driving device in a state where the lens body, the spacer, and the housing member are removed.

Fig. 6A is an upper perspective view of the lens holding member.

Fig. 6B is an upper perspective view of the lens holding member.

Fig. 7A is a lower perspective view of the lens holding member.

Fig. 7B is a lower perspective view of the lens holding member.

Fig. 8A is a top view of the lens holding member.

Fig. 8B is a top view of the lens holding member.

Fig. 9A is a right side view of the lens holding member.

Fig. 9B is a right side view of the lens holding member.

Fig. 9C is a left side view of the lens holding member.

Fig. 9D is a left side view of the lens holding member.

Fig. 10A is an enlarged view of a part of the lens holding member.

Fig. 10B is an enlarged view of a part of the lens holding member.

Fig. 11A is a bottom view of the lens driving apparatus in a state where a part of the components is removed.

Fig. 11B is a bottom view of the lens driving apparatus in a state where a part of the components is removed.

Fig. 12A is a top view of the upper leaf spring.

Fig. 12B is a bottom view of the lower leaf spring.

Fig. 13A is a diagram illustrating a connection structure between a plate spring and a coil in the lens driving device.

Fig. 13B is a diagram illustrating a connection structure between a plate spring and a coil in the lens driving device.

Fig. 14A is a diagram showing a structural example of the base member.

Fig. 14B is a diagram showing a structural example of the base member.

Fig. 14C is a diagram showing a structural example of the base member.

Fig. 14D is a diagram showing a structural example of the base member.

Fig. 15A is an upper perspective view of the lens holding member.

Fig. 15B is a top view of the lens holding member.

Fig. 16A is a sectional view of the lens holding member.

Fig. 16B is a sectional view of the lens holding member.

Fig. 17A is a cross-sectional view of another example of the lens holding member.

Fig. 17B is a cross-sectional view of another example of the lens holding member.

Fig. 18A is a diagram showing a configuration example of the accommodating recess.

Fig. 18B is a diagram showing another example of the structure of the accommodating recess.

Fig. 18C is a view showing still another configuration example of the housing concave portion.

Fig. 18D is a view showing still another example of the structure of the housing concave portion.

Fig. 18E is a view showing still another configuration example of the housing concave portion.

Fig. 18F is a view showing still another configuration example of the housing concave portion.

Fig. 19A is a view showing still another configuration example of the housing concave portion.

Fig. 19B is a view showing still another configuration example of the housing concave portion.

Fig. 19C is a view showing still another configuration example of the housing concave portion.

Fig. 19D is a view showing still another example of the structure of the accommodating recess.

Fig. 19E is a view showing still another configuration example of the housing concave portion.

Detailed Description

Hereinafter, a lens driving device 101 according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1A is an upper perspective view of the lens driving device 101 to which the lens body LS is attached, and fig. 1B is an upper perspective view of the lens body LS. Fig. 2 is an exploded perspective view of the lens driving device 101.

In fig. 1A, X1 represents one direction of an X axis constituting a three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X axis. Further, Y1 represents one direction of the Y axis constituting the three-dimensional orthogonal coordinate system, and Y2 represents the other direction of the Y axis. Similarly, Z1 represents one direction of the Z axis constituting the three-dimensional orthogonal coordinate system, and Z2 represents the other direction of the Z axis. In the present embodiment, the optical axis JD extends parallel to the Z axis. The X1 side of the lens driving device 101 corresponds to the front side (front side) of the lens driving device 101, and the X2 side of the lens driving device 101 corresponds to the rear side (rear side) of the lens driving device 101. The Y1 side of the lens driving device 101 corresponds to the right side of the lens driving device 101, and the Y2 side of the lens driving device 101 corresponds to the left side of the lens driving device 101. The Z1 side of the lens driving device 101 corresponds to the upper side of the lens driving device 101, and the Z2 side of the lens driving device 101 corresponds to the lower side of the lens driving device 101. The same applies to the other figures.

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

The case member 4 is configured to function as a housing HS covering the respective members. In the present embodiment, the case member 4 is manufactured by subjecting a plate material made of a soft magnetic material such as iron to press working, drawing working, or the like, and functions as a yoke. However, the case member 4 may be manufactured by subjecting a plate material made of a nonmagnetic metal such as austenitic stainless steel to press working, drawing working, or the like.

The housing member 4 has a rectangular tubular outer peripheral wall portion 4A, and a rectangular annular and flat plate-shaped top plate portion 4B provided continuously with an upper end (end on the Z1 side) of the outer peripheral wall portion 4A. A substantially circular opening 4k is formed in the center of the top plate 4B. The outer peripheral wall portion 4A includes 1 st side plate portion 4A1 to 4 th side plate portion 4A4. The 1 st side plate portion 4A1 and the 3 rd side plate portion 4A3 are opposed to each other, and the 2 nd side plate portion 4A2 and the 4 th side plate portion 4A4 are opposed to each other. The 1 st side plate portion 4A1 and the 3 rd side plate portion 4A3 extend perpendicularly to the 2 nd side plate portion 4A2 and the 4 th side plate portion 4A4. The top plate 4B is not limited to a flat plate, and may have a concave portion or a convex portion.

The lens body LS is, for example, a cylindrical lens barrel having at least 1 lens. In the example shown in fig. 1B, the lens body LS has a two-stage cylindrical outer shape. Specifically, the lens body LS is configured such that the outer peripheral surface ES of the lower cylindrical body is held by the lens holding member 2 in contact with the lens holding member 2. In the present embodiment, the outer peripheral surface ES is formed of a smooth cylindrical surface on which no thread or the like is formed, so that the lens size can be increased.

Next, with reference to fig. 2, 3A, 3B, 4A, 4B, 5A, and 5B, each component housed in the housing member 4 serving as the housing HS will be described. Fig. 2 is an exploded perspective view of the lens driving device 101. Fig. 3A is an upper perspective view of the lens driving device 101 in a state where the lens body LS is removed, and fig. 3B is a front view of the lens driving device 101 in a state where the lens body LS is removed. Fig. 4A is a top view of the lens driving device 101 in a state in which the lens body LS is removed, and fig. 4B is a bottom view of the lens driving device 101 in a state in which the lens body LS is removed. Fig. 5A is an upper perspective view of the lens driving device 101 in a state where the lens body LS, the housing member 4, and the spacer 1 are removed. Fig. 5B is a front view of the lens driving device 101 in a state where the lens body LS, the housing member 4, and the spacer 1 are removed. In fig. 5A and 5B, a dot pattern is provided to the coil 3 for clarity.

As shown in fig. 2, the lens driving device 101 includes a lens holding member 2 that can hold a lens body LS, a driving mechanism MK that can move the lens holding member 2 in the optical axis direction, a leaf spring 6 that supports the lens holding member 2 so as to be movable in the optical axis direction, a fixing-side member RG that fixes the leaf spring 6, and a metal member 7 that brings about electrical connection with the outside. The optical axis direction includes a direction about the optical axis JD of the lens body LS and a direction parallel to the optical axis JD.

As shown in fig. 2, the drive mechanism MK includes a coil 3 wound in an octagonal ring shape, a housing member 4 having a rectangular tubular outer peripheral wall portion 4A and serving as an outer housing, and a magnet 5. The magnet 5 includes a 1 st magnet 5A and a 2 nd magnet 5B disposed opposite to both sides of the coil 3.

The fixed-side member RG includes the spacer 1, the housing member 4, and the base member 18 in which the metal member 7 is embedded.

The leaf spring 6 includes an upper leaf spring 16 disposed between the lens holding member 2 and the case member 4 (more precisely, the spacer 1), and a lower leaf spring 26 disposed between the lens holding member 2 and the base member 18. The lower plate spring 26 includes a 1 st lower plate spring 26A and a 2 nd lower plate spring 26B.

The lens driving device 101 typically has an outer shape of a substantially rectangular parallelepiped shape as shown in fig. 1A, and is mounted on an external substrate (not shown) on which an image pickup element (not shown) is mounted. The external substrate, the lens driving device 101, the lens body LS mounted on the lens holding member 2, and the image pickup element mounted on the external substrate so as to face the lens body LS constitute a camera module. The coil 3 is connected to a power source via the lower leaf spring 26, the metal member 7, and an external substrate. If a current flows through the coil 3, the drive mechanism MK generates electromagnetic force in the optical axis direction.

The lens driving device 101 uses the electromagnetic force to move the lens holding member 2 in the optical axis direction on the Z1 side (object side) of the image pickup element, thereby realizing an auto focus adjustment function. Specifically, the lens driving device 101 can move the lens holding member 2 in a direction away from the image pickup element to perform macro shooting, and can move the lens holding member 2 in a direction approaching the image pickup element to perform infinity shooting.

Next, the lens holder 2 and the driving mechanism MK will be described. Fig. 6A is an upper perspective view of the lens holding member 2, and fig. 6B is an upper perspective view of the lens holding member 2 showing a state in which the coil 3 is wound around the lens holding member 2 of fig. 6A. Fig. 7A is a lower perspective view of the lens holding member 2, and fig. 7B is a lower perspective view of the lens holding member 2 showing a state in which the coil 3 is wound around the lens holding member 2 of fig. 7A. Fig. 8A is a plan view of the lens holding member 2, and fig. 8B is a plan view of the lens holding member 2 showing a state in which the coil 3 is wound around the lens holding member 2 of fig. 8A. Fig. 9A is a right side view of the lens holding member 2 as viewed from the Y1 side, and fig. 9B is a right side view of the lens holding member 2 showing a state in which the coil 3 is wound around the lens holding member 2 shown in fig. 9A. Fig. 9C is a left side view of the lens holding member 2 as viewed from the Y2 side, and fig. 9D is a left side view of the lens holding member 2 showing a state in which the coil 3 is wound around the lens holding member 2 shown in fig. 9C. Fig. 10A is an enlarged view of a portion in the range R1 shown in fig. 7B, and fig. 10B is an enlarged view when a portion in the range R2 shown in fig. 7B is viewed from the Y2 side. Fig. 11A is a bottom view of the lens driving device 101 in a state where the metal member 7 and the base member 18 are removed, and fig. 11B is a bottom view of the lens driving device 101 in a state where the 1 st lower leaf spring 26A, the 2 nd lower leaf spring 26B, and the lens holding member 2 are further removed. In fig. 6B, 7B, 8B, 9D, 10A, 10B, 11A, and 11B, dot patterns are provided to the coil 3 for clarity.

In the present embodiment, the lens holding member 2 is manufactured by injection molding a synthetic resin such as a Liquid Crystal Polymer (LCP). Specifically, as shown in fig. 6A, the lens holding member 2 includes a cylindrical portion 12 formed so as to extend in the optical axis direction, and a flange portion (flange portion) 52 formed on the image pickup element side (Z2 side) in the optical axis direction. In the present embodiment, about half of the upper side of the cylindrical portion 12 is formed in a substantially cylindrical shape.

The cylindrical portion 12 has a receiving recess SR formed in an inner peripheral surface thereof, so that an adhesive is disposed between the inner surface SF of the cylindrical portion 12 and an outer peripheral surface ES (see fig. 1B) of the lens body LS. In the example shown in fig. 6A and 6B, 20 accommodating recesses SR are formed in the inner peripheral surface of the cylindrical portion 12. Further, a pedestal portion 12d having depressions 12dh is provided on the end surface of the tubular portion 12 on the object side. As shown in fig. 5A, an inner portion 16i of the upper plate spring 16 is placed on the pedestal 12d.

As shown in fig. 6A, a coil support portion 12j serving as an outer wall portion for supporting the coil 3 from the inside is provided on the outer peripheral surface of the tubular portion 12. In the present embodiment, the coil support portion 12j has an outer shape which is viewed in a plan view as an octagonal shape so as to be able to support the coil 3 which is viewed in a plan view as an octagonal ring shape. On the object side of the coil support 12j, an edge 12h protruding radially outward is formed so as to face the flange 52 around the optical axis. As shown in fig. 6B, the coil 3 is supported by the coil support portion 12j and is fitted in an octagonal ring shape on the outer peripheral surface of the lens holding member 2 with being sandwiched between the eave portion 12h and the flange portion 52 in the optical axis direction.

The flange 52 protrudes radially outward from an end of the cylindrical portion 12 on the image pickup device side (Z2 side). The coil 3 is disposed on the object side of the flange portion 52. As shown in fig. 7B, two notch portions 52k are formed in the flange portion 52 with the optical axis JD interposed therebetween. The extension 33, which is a part of the conductive wire material constituting the coil 3, is inserted through the notch 52k. Specifically, the extension 33A, which is a part of the wire on the winding end side of the coil 3, is inserted into one of the cutout portions 52k, and the extension 33B, which is a part of the wire on the winding start side of the coil 3, is inserted into the other of the cutout portions 52k. The edge portion of the flange portion 52 forming the notch portion 52k is formed to be relatively rounded (without sharp corners). This is to prevent breakage of the wire material constituting the coil 3 in contact with the edge portion.

As shown in fig. 7A, the flange 52 includes four protruding portions 2t having a circular convex shape protruding downward (Z2 direction) from the image pickup device side (Z2 side), and two protruding portions 72 having a square convex shape protruding downward (Z2 direction) as well.

As shown in fig. 7B, the protruding portion 72 includes a protruding portion 72A corresponding to the winding end side of the coil 3 (winding portion 13) and a protruding portion 72B corresponding to the winding start side of the coil 3. That is, both ends of the wire material constituting the coil 3 are wound around the two protruding portions 72 and held.

As shown in fig. 7A and 11A, the protruding portion 2t includes two protruding portions 2t corresponding to the two through holes 26r (see fig. 12B) formed in the 1 st lower plate spring 26A, and two protruding portions 2t corresponding to the two through holes 26r (see fig. 12B) formed in the 2 nd lower plate spring 26B. Further, the inner portion 26i of the 1 st support portion (movable side support portion) that is each of the 1 st lower leaf spring 26A and the 2 nd lower leaf spring 26B is fitted and fixed to the protruding portion 2t. The inner portions 26i of the 1 st and 2 nd lower leaf springs 26A and 26B are fixed by heat staking the protruding portions 2t inserted into the through holes 26r formed in the inner portions 26i. In fig. 7A and 7B, the protruding portion 2t is illustrated in a state in which the tip after heat staking is deformed. The same applies to other drawings illustrating the protruding portion 2t.

Next, a driving mechanism MK of the lens driving device 101 will be described. As shown in fig. 11B, the drive mechanism MK includes a coil 3, a housing member 4, and a magnet 5. The magnet 5 includes a 1 st magnet 5A and a 2 nd magnet 5B arranged so as to face two of four side surfaces of the housing member 4. The drive mechanism MK generates a drive force (thrust) by the current flowing through the coil 3 and the magnetic field generated by the magnet 5, and moves the lens holding member 2 up and down along the optical axis direction.

As shown in fig. 7B, the coil 3 is formed by winding a conductive (metal) wire (lead) around the outer periphery of the lens holding member 2. Specifically, the coil 3 includes a winding portion 13 as a coil body portion formed by winding in an octagonal ring shape, and an extension portion 33 extending from the winding portion 13 and wound around the protruding portion 72. Fig. 7B is a diagram showing a detailed winding state of the conductive wire material covered with the insulating member for clarity, with respect to the winding portion 13. That is, the winding portion 13 is simplified and illustrated. The same applies to the other drawings illustrating the winding portion 13.

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

Specifically, as shown in fig. 10B, the extension portion 33B includes a winding portion 33m wound around the protruding portion 72B, an opposing portion 33c extending so as to oppose the bottom surface (Z2-side surface) of the lens holding member 2, and an insertion portion 33k inserted into the notch portion 52k and extending from the image pickup element side (Z2-side) of the flange portion 52 to the object side (Z1-side).

In the present embodiment, before winding the wire material constituting the coil 3 onto the coil support portion 12j (see fig. 6A) of the lens holding member 2, the extension portion 33B is wound onto the protruding portion 72B of the lens holding member 2. In the example shown in fig. 10B, a part of the wire material constituting the coil 3 is wound around the protruding portion 72B by 3 turns. Thereby, the winding portion 33m is formed on the protruding portion 72B, and a part of the extending portion 33B is held on the protruding portion 72B. However, the extension 33B may be wound around the protrusion 72B of the lens holding member 2 after winding the wire material constituting the coil 3 around the coil support 12j of the lens holding member 2.

Typically, after winding a part of the extension 33B onto the projection 72B, the rest of the wire material constituting the coil 3 is wound onto the coil support 12j of the lens holding member 2. At this time, as shown in fig. 10B, a part of the extension portion 33B extending from the winding portion 33m extends from the lower side of the flange portion 52 to the upper side of the flange portion 52 through the notch portion 52 k. At this time, the portion facing the bottom surface of the lens holder 2 constitutes the facing portion 33c of the extension 33B, and the portion passing through the cutout 52k constitutes the insertion portion 33k of the extension 33B.

As shown in fig. 6B, the winding portion 13 of the coil 3 wound around the coil support portion 12j of the lens holding member 2 is disposed at a position surrounding the periphery of the lens holding member 2. The winding portion 13 is fixed to the object side of the flange portion 52 with the flange portion 52 sandwiched between the flange portion 52 and the eave portion 12h in a state of being supported from the inside by the coil support portion 12 j. Further, since the inner peripheral surface of the winding portion 13 is supported by the coil support portion 12j isotropically and evenly Heng Liang, the winding portion 13 is held by the lens holding member 2 in a state where the central axis of the coil 3 coincides with the central axis of the lens holding member 2. Therefore, the optical axis JD of the lens body LS held by the lens holding member 2 is configured to easily coincide with the central axes of the lens holding member 2 and the coil 3.

When the winding of the wire rod around the outer periphery of the lens holder 2 is completed, the extension portion 33A connected to the end portion on the winding completion side of the winding portion 13 is led out from the object side of the flange portion 52 to the image pickup device side of the flange portion 52 via the notch portion 52k, as shown in fig. 10A. Specifically, the insertion portion 33k passes through the notch portion 52k, and the opposing portion 33c extends so as to oppose the bottom surface of the lens holding member 2, and winds the winding portion 33m around the protruding portion 72A of the lens holding member 2. In the example shown in fig. 10A, extension 33A is wrapped 3 times around protrusion 72A.

Next, the case member 4 constituting the drive mechanism MK will be described. In the present embodiment, the case member 4 is manufactured by subjecting a plate material made of a soft magnetic material such as iron to press working, drawing working, or the like, and functions as a yoke. Specifically, as shown in fig. 3A, the housing member 4 has a box-like outer shape in which the housing portion 4s is set. As described above, the housing member 4 includes the rectangular tubular outer peripheral wall portion 4A and the flat plate-shaped and rectangular annular top plate portion 4B provided so as to be continuous with the upper end (end on the Z1 side) of the outer peripheral wall portion 4A. As shown in fig. 11B, the housing member 4 configured as described above accommodates the coil 3 and the magnet 5 in the accommodation portion 4 s. The housing member 4 is coupled to the base member 18 as shown in fig. 3A and 3B.

Next, the magnet 5 constituting the drive mechanism MK will be described. As shown in fig. 2, the magnet 5 has a substantially rectangular parallelepiped shape. As shown in fig. 11B, the magnet 5 is located outside the coil 3 and is disposed along two side surfaces (side plate portions) of four side surfaces (side plate portions) of the rectangular tubular outer peripheral wall portion 4A constituting the housing member 4, which are opposed to each other. Specifically, as shown in fig. 11A and 11B, the 1 st magnet 5A is disposed along the 2 nd side plate portion 4A2 facing the protruding portion 72A, and the 2 nd magnet 5B is disposed along the 4 th side plate portion 4A4 facing the protruding portion 72B. The 1 st magnet 5A and the 2 nd magnet 5B are fixed to the housing member 4 with an adhesive, and are disposed such that the inner side (the side close to the optical axis JD) is the N pole and the outer side is the S pole, for example. However, the 1 st magnet 5A and the 2 nd magnet 5B may be arranged so that the inner side is the S pole and the outer side is the N pole.

Next, the leaf spring 6 and the fixed-side member RG will be described with reference to fig. 12A, 12B, 13A, 13B, and 14A to 14D. Fig. 12A and 12B are diagrams showing a structural example of the leaf spring 6. Specifically, fig. 12A is a top view of the upper plate spring 16, and fig. 12B is a bottom view of the lower plate spring 26. Fig. 13A and 13B are diagrams illustrating an example of a connection structure between the 2 nd lower plate spring 26B and the coil 3. Specifically, fig. 13A is an enlarged view of the range R3 shown in fig. 11A, and fig. 13B is an enlarged view of the 2 nd lower plate spring 26B, the coil 3, and the lens holding member 2 when the portion in the range R3 shown in fig. 11A is viewed from the Y2 side. In fig. 13A and 13B, the conductive adhesive CA as a bonding material is shown in a cross-line pattern for clarity. In fig. 13A and 13B, a thicker dot pattern is provided to the lens holding member 2 and a thinner dot pattern is provided to the coil 3 for clarity. Fig. 14A to 14D are diagrams showing a configuration example of the base member 18 as the fixed-side member RG. Specifically, fig. 14A is a top perspective view of the base member 18 in a state in which the metal member 7 embedded in the base member 18 is removed, fig. 14B is a top perspective view of the metal member 7, fig. 14C is a top perspective view of the base member 18 including the metal member 7, and fig. 14D is a top perspective view of the base member 18 in a state in which the 1 st lower leaf spring 26A and the 2 nd lower leaf spring 26B are attached. In fig. 14C, dot patterns are provided to the metal member 7 for clarity. In fig. 14D, dot patterns are provided to the lower plate spring 26 for clarity.

In the example shown in fig. 12A, 12B, 13A, 13B, and 14A to 14D, the plate spring 6 is made of a metal plate mainly made of a copper alloy. As shown in fig. 2, the leaf spring 6 includes an upper leaf spring 16 disposed between the lens holding member 2 and the housing member 4 (more precisely, the spacer 1), and a lower leaf spring 26 disposed between the lens holding member 2 and the base member 18. In a state where the lens holding member 2 and the leaf springs 6 (the upper leaf spring 16, the 1 st lower leaf spring 26A, and the 2 nd lower leaf spring 26B) are combined, the leaf springs 6 support the lens holding member 2 so that the lens holding member 2 can move in the optical axis direction (Z axis direction). The lower plate spring 26 also functions as a power supply member for supplying current to the coil 3. Therefore, the 1 st lower plate spring 26A is electrically and mechanically connected to one end of the coil 3, and the 2 nd lower plate spring 26B is electrically and mechanically connected to the other end of the coil 3. A spacer 1 is arranged between the upper leaf spring 16 and the housing part 4. The spacer 1 is configured to prevent the lens holding member 2 from colliding with the housing member 4 when the lens holding member 2 moves in the Z1 direction. That is, the spacer 1 is disposed so that a space can be formed between the lens holding member 2 and the top plate portion 4B of the housing member 4. However, the spacer 1 may be omitted as long as a space can be formed between the lens holding member 2 and the top plate portion 4B of the housing member 4 by another structure or the like.

As shown in fig. 12A, the upper leaf spring 16 has a substantially rectangular annular outer shape. The upper plate spring 16 includes an inner portion 16i as a 1 st support (movable side support) fixed to the movable side member (lens holding member 2), two outer portions 16e as a 2 nd support (fixed side support) fixed to the fixed side member RG, and four elastic arm portions 16g located between the inner portion 16i and the two outer portions 16 e. Specifically, the two outer side portions 16e have two corner portions 16b and a cross brace 16r that connects the two corner portions 16b, respectively. The cross brace portion 16r is sandwiched between the spacer 1 and the magnet 5 and fixed by an adhesive. The spacer 1, the housing member 4, and the magnet 5 function as a fixed-side member RG.

When the upper leaf spring 16 is incorporated into the lens driving device 101, as shown in fig. 5A, the inner portion 16i is placed on the pedestal portion 12d (see fig. 6A) of the lens holding member 2. The inner portion 16i is fixed to the lens holder 2 by an adhesive AD (see fig. 5A) applied to the recess 12dh formed in the pedestal 12 d. As shown in fig. 5B, the outer portion 16e is in contact with the upper surface (Z1 side surface) of the magnet 5, and is sandwiched and fixed between the spacer 1 (not shown in fig. 5B) and the magnet 5. The outer portion 16e sandwiched and fixed between the spacer 1 and the magnet 5 functions as a fixing-side member RG.

As shown in fig. 12A, the upper leaf spring 16 is formed to be rotationally symmetrical about the optical axis JD. The upper plate spring 16 is fixed to the lens holder 2 by an inner portion 16i and fixed to the housing member 4 by an outer portion 16e via the spacer 1. Therefore, the upper plate spring 16 can support the lens holding member 2 in a balanced manner.

The 1 st lower leaf spring 26A and the 2 nd lower leaf spring 26B are configured such that the inner side shapes thereof are substantially half-circle shapes, as shown in fig. 12B. The 1 st lower leaf spring 26A and the 2 nd lower leaf spring 26B each include an inner portion 26i as a 1 st support (movable side support) fixed to the movable side member (lens holding member 2), an outer portion 26e as a 2 nd support (fixed side support) fixed to the fixed side member RG (base member 18), and two elastic arm portions 26g located between the inner portion 26i and the outer portion 26 e.

As shown in fig. 12B, the inner portions 26i of the 1 st and 2 nd lower leaf springs 26A and 26B each include two inner engaging portions 26c engaged with the projection 2t of the lens holding member 2, a connecting portion 26p connecting the two inner engaging portions 26c, and a connecting plate portion 26h facing the extending portion 33 of the coil 3.

When the 1 st lower plate spring 26A and the 2 nd lower plate spring 26B are incorporated into the lens driving device 101, the four protruding portions 2t of the lens holding member 2 shown in fig. 7A are inserted into the circular through holes 26r provided in the inner joint portions 26c of the 1 st lower plate spring 26A and the 2 nd lower plate spring 26B shown in fig. 12B, respectively. Further, for example, the protruding portion 2t is heat-staked or cold-staked, so that the inner joint portion 26c is fixed to the lens holding member 2 as shown in fig. 11A. Thereby, the inner portions 26i of the 1 st lower leaf spring 26A and the 2 nd lower leaf spring 26B are positioned and fixed to the lens holding member 2.

The outer portion 26e of the 1 st lower side plate spring 26A includes an outer engagement portion 26d that engages with the base member 18, as shown in fig. 12B. The through hole 26s provided in the outer engaging portion 26d of the 1 st lower plate spring 26A receives the projection 18t provided on the upper surface of the base member 18 (see fig. 14A). The protruding portion 18t is fixed to the outer joint part 26d by heat caulking or cold caulking. Thereby, the outer portion 26e of the 1 st lower side plate spring 26A is positioned and fixed to the base member 18 as shown in fig. 14D. The same applies to the 2 nd lower plate spring 26B.

In this way, the 1 st lower plate spring 26A is connected to the lens holding member 2 via the two inner engaging portions 26c, and is connected to the base member 18 via the two outer engaging portions 26 d. The same applies to the 2 nd lower plate spring 26B. With this configuration, the 1 st lower leaf spring 26A and the 2 nd lower leaf spring 26B can support the lens holding member 2 in a state of being movable in the optical axis direction in a balanced manner.

Next, an example of a connection structure between the 2 nd lower plate spring 26B and the coil 3 will be described with reference to fig. 13A and 13B. The description of the 2 nd lower leaf spring 26B applies to the 1 st lower leaf spring 26A.

As shown in fig. 13A and 13B, the connection plate portion 26h of the inner portion 26i of the 2 nd lower plate spring 26B is configured to face the bank 82 (see fig. 10B) of the lens holding member 2 when the lens driving device 101 is assembled. That is, as shown in fig. 13A, the surface of the connecting plate portion 26h on the object side (Z1 side) is opposed to the concave receiving portion 82s surrounded by the dam portion 82. As shown in fig. 13A, the opposing portion 33c of the extending portion 33B of the coil 3 extends through the space between the object-side surface of the inner portion 26i (the connecting plate portion 26 h) of the 2 nd lower plate spring 26B and the image pickup element-side surface (Z2-side) of the lens holding member 2. The dam 82 is formed by a step formed on the bottom surface of the lens holder 2. The surface of the lens holding member 2 on the image pickup device side (Z2 side) forms the inner bottom surface of the housing 82 s.

The housing 82s is configured to be able to house the conductive adhesive CA that connects the extension 33B of the coil 3 and the 2 nd lower plate spring 26B. In the present embodiment, since the bank 82 is formed at a position adjacent to the protruding portion 72B, the side wall of the protruding portion 72B is appropriately used as a part of the bank 82. Accordingly, the receiving portion 82s is provided at a position adjacent to the protruding portion 72B.

When the 2 nd lower plate spring 26B is assembled to the lens holding member 2, as shown in fig. 13B, the protruding portion 72B protrudes downward (in the Z2 direction) from the inner portion 26i such that the tip (the end on the Z2 side) thereof is positioned on the image pickup element side (the Z2 side) of the inner portion 26i of the 2 nd lower plate spring 26B. A part of the winding portion 33m is also wound around the protruding portion 72B so as to be located on the image pickup device side (Z2 side) of the inner portion 26 i.

The 2 nd lower plate spring 26B and the extension 33B of the coil 3 are electrically and physically connected by a conductive adhesive CA in which a conductive filler such as silver particles is dispersed in a synthetic resin. Specifically, before the 2 nd lower plate spring 26B is incorporated into the lens holding member 2, the conductive adhesive CA is applied to the housing portion 82s surrounded by the dam portion 82 of the lens holding member 2, and then the 2 nd lower plate spring 26B is attached to the lens holding member 2. Next, the protruding portion 2t of the lens holding member 2 is heat staked, and the conductive adhesive CA is thermally cured. The thermosetting of the conductive adhesive CA applied from the conductive adhesive CA to the housing 82s is typically performed in a state in which the lens holding member 2 is disposed upside down so that the protruding portion 72B protrudes vertically upward. Therefore, even when the conductive adhesive CA has fluidity, the conductive adhesive CA can be properly held at a desired position (position within the housing 82 s). Further, since a part of the opposing portion 33c is disposed in the housing portion 82s, it is buried in the conductive adhesive CA. The conductive adhesive CA is not limited to the thermosetting type, and may be an ultraviolet curing type or a moisture curing type.

Next, the stationary-side member RG will be described. The fixing-side member RG includes a spacer 1 for fixing the upper plate spring 16, a housing member 4, a magnet 5, and a base member 18 for fixing the 1 st lower plate spring 26A and the 2 nd lower plate spring 26B.

The base member 18 is manufactured by injection molding using a synthetic resin such as a liquid crystal polymer. In the present embodiment, as shown in fig. 14A, the base member 18 is a member having a rectangular plate-frame-like outer shape, and a circular opening 18k is formed in the center. Further, six protruding portions 18t of a circular convex shape protruding upward are provided on a surface (upper surface) of the base member 18 on the object side (Z1 side). The protruding portion 18t is inserted into a through hole 26s (see fig. 12B) provided in the outer joint portion 26d of each of the 1 st and 2 nd lower leaf springs 26A and 26B. At this time, the protruding portion 18t is fixed to the outer joint part 26d by heat staking. In fig. 14A, 14C, and 14D, the protruding portion 18t is illustrated in a state in which the tip after heat staking is deformed. The same applies to other drawings illustrating the protruding portion 18t. The protruding portion 18t may be fixed to the outer joint part 26d by cold caulking.

The metal member 7, which is shown in fig. 14B and is formed by insert molding and is embedded in the base member 18, is formed of a metal plate made of a material including copper, iron, an alloy containing these materials as a main component, or the like. The metal members 7 include 1 st to 4 th metal members 7A to 7D. As shown in fig. 14C, the 1 st to 4 th metal members 7A to 7D are partially exposed on the upper surface (Z1 side surface) of the base member 18. The 1 st metal member 7A and the 2 nd metal member 7B, which are electrically insulated from each other, are electrically and mechanically connected to an external substrate (not shown) on which the imaging element is mounted, via a terminal portion 7AT and a terminal portion 7BT, respectively, which extend downward (Z2 direction) from an end portion on the front side (X1 side) of the base member 18. As shown in fig. 14C and 14D, the 1 st metal member 7A is electrically and mechanically connected to the 1 st lower leaf spring 26A by a bonding material or fusion bond such as solder at the exposed portion 7AP, and the 2 nd metal member 7B is electrically and mechanically connected to the 2 nd lower leaf spring 26B by a bonding material or fusion bond such as solder at the exposed portion 7 BP. Further, the 1 st lower plate spring 26A is electrically and mechanically connected to one end of the coil 3, and the 2 nd lower plate spring 26B is electrically and mechanically connected to the other end of the coil 3. Therefore, the coil 3 can receive current supply through the 1 st metal member 7A and the 2 nd metal member 7B and the 1 st lower leaf springs 26A and the 2 nd lower leaf springs 26B.

The 3 rd metal part 7C includes two connection portions 7CP, and the 4 th metal part 7D includes two connection portions 7DP. As shown in fig. 14C, the 3 rd metal member 7C exposes the two connection portions 7CP on the upper surface of the base member 18 so as to correspond to two lower end portions among the lower end portions of the four corners of the housing member 4. Similarly, as shown in fig. 14C, the 4 th metal member 7D exposes the two connection portions 7DP on the upper surface of the base member 18 so as to correspond to the remaining two lower end portions among the lower end portions of the four corners of the housing member 4.

As shown in fig. 3A, the inner surfaces of the housing member 4 located closer to the lower end of the outer peripheral wall 4A are combined and positioned on the outer peripheral side surface of the base member 18. Then, the connection portions 7CP and 7DP are welded to the lower end portions of the four corners of the housing member 4, respectively, to fix the base member 18 to the housing member 4. In this state, the case member 4 and the base member 18 may be fixed at least partially with an adhesive. As a result, the 3 rd metal member 7C, the 4 th metal member 7D, and the housing member 4 are electrically integrated, and grounded via the terminal portion 7DT of the 4 th metal member 7D.

Next, with reference to fig. 15A, 15B, 16A and 16B, a description will be given of the accommodating recess SR formed in the inner surface SF of the cylindrical portion 12 of the lens holding member 2. Fig. 15A and 15B are overall views of the lens holding member 2. Specifically, fig. 15A is an upper perspective view of the lens holding member 2, and fig. 15B is a plan view of the lens holding member 2. Fig. 16A and 16B are cross-sectional views of the lens holding member 2. Specifically, fig. 16A and 16B show a cross section of the lens holding member 2 in a virtual plane parallel to the YZ plane including the one-dot chain line L1 shown in fig. 15B. More specifically, fig. 16A shows a state when the cross section is viewed from obliquely above, and fig. 16B shows a state when the cross section is viewed from the X1 side (front side).

As shown in fig. 15A, 16A and 16B, the inner surface SF of the cylindrical portion 12 is divided up and down by a parting line PL formed at the center in the optical axis direction. In addition, the parting line PL formed at the center portion of the inner surface SF of the cylindrical portion 12 may be a parting line PL passing through not only the midpoint between the upper end and the lower end of the inner surface SF but also a point at a position displaced upward and downward from the midpoint. That is, the central portion of the inner surface SF means a portion other than the upper end portion and the lower end portion of the inner surface SF.

The parting line PL is a line corresponding to a parting plane (parting plane) of a plurality of molds used in injection molding the lens holding member 2. In this example, the lens holding member 2 is molded using a plurality of molds including an upper mold and a lower mold, not shown, and the parting line PL corresponds to a joint between the upper mold and the lower mold.

Specifically, the inner surface SF is divided into an upper inner surface USF and a lower inner surface LSF with the parting line PL as a boundary. In fig. 15A and 16A, for clarity, a thicker dot pattern is given to the upper inner surface USF, and a thinner dot pattern is given to the lower inner surface LSF.

The inner surface SF of the cylindrical portion 12 of the lens holding member 2 shown in fig. 15A, 15B, 16A and 16B is formed with a housing recess SR. In fig. 16B, for clarity, a cross line pattern is provided to the accommodating recess SR.

The accommodating recess SR is an example of a recess formed so as to be able to accommodate an adhesive (not shown) for bonding the lens body LS and the lens holding member 2 between the lens body LS and the lens holding member 2. In this example, as shown in fig. 15B, 20 accommodating recesses SR are provided at equal intervals along the circumference of a circle centered on the optical axis JD. Specifically, 20 accommodating recesses SR (1 st accommodating recess SR1 to 20 th accommodating recess SR 20) are formed along the circumference at each angle α (=18 degrees). Further, between the two housing recesses SR (between the 1 st housing recess SR1 and the 2 nd housing recess SR 2), a contact portion CS (1 st contact portion CS 1) that contacts the outer peripheral surface ES (see fig. 1B) of the lens body LS is arranged. The accommodating recess SR may be formed at unequal intervals along the circumference of a circle centered on the optical axis JD. Further, only 1 accommodating recess SR may be formed on the inner surface SF of the cylindrical portion 12.

The plurality of (20 in this example) accommodating recesses SR typically have the same shape as shown in fig. 15A, 16A, and 16B. However, the plurality of accommodating recesses SR may have different shapes. In fig. 15A, 16A and 16B, for clarity, only the 1 st housing recess SR1 and the 2 nd housing recess SR2 are defined by the lead wire, and the definition by the lead wire is omitted for the 3 rd housing recess SR3 to the 20 th housing recess SR 20. In fig. 15A, 15B, 16A, and 16B, for clarity, only the 1 st contact CS1 is specified by the lead wire for the contact CS, and the specification by the lead wire is omitted for the remaining 19 contacts.

As shown in fig. 15A, 16A, and 16B, the accommodating recess SR may include an upper accommodating recess USR formed in the upper inner surface USF and a lower accommodating recess LSR formed in the lower inner surface LSF, respectively. Also, the contact portions CS may include upper-side contact portions UCS formed on the upper-side inner surface USF and lower-side contact portions LCS formed on the lower-side inner surface LSF, respectively.

For example, the 1 st accommodation recess SR1 includes a 1 st upper accommodation recess USR1 and a 1 st lower accommodation recess LSR1. Similarly, the 2 nd accommodation recess SR2 includes a 2 nd upper accommodation recess USR2 and a 2 nd lower accommodation recess LSR2. The 1 st upper side contact UCS1 is disposed between the 1 st upper side accommodation recess USR1 and the 2 nd upper side accommodation recess USR2, and the 1 st lower side contact LCS1 is disposed between the 1 st lower side accommodation recess LSR1 and the 2 nd lower side accommodation recess LSR2.

As shown in fig. 16B, the 1 st upper accommodating recess USR1 extends in the vertical direction, and has a lower end portion (narrow portion) in contact with the parting line PL and an upper end portion (wide portion) in contact with the upper end of the cylindrical portion 12. Similarly, the 1 st lower accommodating recess LSR1 extends in the vertical direction, and has an upper end portion (narrow portion) in contact with the parting line PL and a lower end portion (wide portion) in contact with the lower end of the cylindrical portion 12.

In this example, the width W1 of the lower end portion of the 1 st upper accommodating recess USR1 is smaller than the width W2 of the upper end portion of the 1 st upper accommodating recess USR 1. The width W3 of the upper end of the 1 st lower accommodating recess LSR1 is smaller than the width W4 of the lower end of the 1 st lower accommodating recess LSR 1. This is because the width W1 needs to be equal to or smaller than the width W2, and the width W3 needs to be equal to or smaller than the width W4 so that the mold can be separated from the lens holding member 2 after injection molding. In this example, the width W1 and the width W3 are the same size, and the width W2 is smaller than the width W4. However, the widths W1 and W3 may be different in size as long as the lower end of the 1 st upper accommodation recess USR1 is at least partially in contact with the upper end of the 1 st lower accommodation recess LSR 1. The width W2 may be the same as the width W4, or may be larger than the width W4.

In this example, the 1 st upper accommodating recess USR1 is formed such that the left end portion thereof is divided by a plane forming an angle β1 with respect to the XY plane, and the right end portion thereof is divided by a plane forming an angle β2 with respect to the XY plane. Also, the 1 st lower accommodating recess LSR1 is formed such that its left end portion is divided by a plane forming an angle β3 with respect to the XY plane, and its right end portion is divided by a plane forming an angle β4 with respect to the XY plane. In this example, the angle β1 and the angle β2 are the same size, and the angle β3 and the angle β4 are the same size. Further, the angle β1 (angle β2) is larger than the angle β3 (angle β4). However, the angles β1 to β4 may all be the same or may be different in size. In this example, the angles β1 to β4 are acute angles, but may be right angles (90 degrees) or obtuse angles.

In this example, the 20 accommodating recesses SR are all formed to have the same depth DP (see fig. 15B), but may include different depths. In this example, the 20 accommodating recesses SR are configured such that the depth of the upper accommodating recess USR and the depth of the lower accommodating recess LSR are the same, but the depth of the upper accommodating recess USR and the depth of the lower accommodating recess LSR may be different.

With the above configuration, the adhesive contained in the containing recess SR can firmly adhere the lens body LS and the lens holding member 2. In addition, even when the cured adhesive (hereinafter referred to as "cured adhesive HA") in the accommodating recess SR is peeled off from the lens holding member 2, the cured adhesive HA can prevent the lens body LS from falling off from the lens holding member 2. This is because the cured adhesive HA HAs the same shape as the accommodating recess SR at least at a portion located nearer to the parting line PL. That is, the reason is that the part of the cured adhesive HA in the upper accommodating recess USR is restricted from moving downward by the shape in which the width of the upper end portion is larger than the width of the lower end portion, and the part of the cured adhesive HA in the lower accommodating recess LSR is restricted from moving upward by the shape in which the width of the lower end portion is larger than the width of the upper end portion. Fig. 16A shows a1 st cured adhesive HA1 as an example of the cured adhesive HA. The 1 st cured adhesive HA1 of fig. 16A is an adhesive cured in the 1 st housing recess SR1, and is shown separated from the 1 st housing recess SR1 for clarity.

In addition, even when the cured adhesive HA is peeled off from the lens holding member 2, the movement of the lens body LS in the up-down direction with respect to the lens holding member 2 can be restricted by the shape thereof, and the rotation of the lens body LS with respect to the lens holding member 2 about the optical axis JD can be restricted.

The adhesive does not have to completely fill the accommodating recess SR, and an amount sufficient to suppress the movement of the lens body LS in the optical axis direction with respect to the lens holding member 2 and the rotation of the lens body LS around the optical axis JD may be disposed in the accommodating recess SR. That is, the cured adhesive HA does not need to have exactly the same shape as the accommodating recess SR. The 1 st cured adhesive HA1 shown in fig. 16A HAs a shape different from the 1 st upper side accommodating recess USR1 in a portion closer to the upper end of the 1 st upper side accommodating recess USR1, and HAs a shape different from the 1 st lower side accommodating recess LSR1 in a portion closer to the lower end of the 1 st lower side accommodating recess LSR 1. This is because the 1 st housing recess SR1 is filled with the adhesive in a portion closer to the parting line PL, but the entire internal space is not filled with the adhesive.

Next, a lens holding member 2X as another configuration example of the lens holding member 2 will be described with reference to fig. 17A and 17B. Fig. 17A and 17B are cross-sectional views of the lens holding member 2X. Specifically, fig. 17A is a view corresponding to fig. 16A, showing a state when the cross section thereof is viewed from obliquely above. Fig. 17B is a view corresponding to fig. 16B, and shows a state when the cross section thereof is viewed from the X1 side (front side).

The lens holding member 2X shown in fig. 17A and 17B is different from the lens holding member 2 having the upper accommodating recess USR in the upper inner surface USF in that the groove GR is provided in the upper inner surface USF, but is common to the lens holding member 2 in other points. Therefore, the description of the common portions will be omitted below, and the different portions will be described in detail.

In fig. 17A, for clarity, a thicker dot pattern is provided to the upper inner surface USF, and a thinner dot pattern is provided to the lower inner surface LSF. In fig. 17B, a cross line pattern is provided to the accommodating recess SR (lower accommodating recess LSR) for clarity. In fig. 17A and 17B, for clarity, only the 1 st lower accommodating recess LSR1 and the 2 nd lower accommodating recess LSR2 are specified by the lead wire, and the specification of the lead wire is omitted for the other lower accommodating recess LSR. In fig. 17A and 17B, for clarity, only the 1 st lower contact portion LCS1 is specified by the lead wire for the contact portion CS, and the specification by the lead wire is omitted for the other lower contact portion LCS.

The groove GR is another example of a receiving recess SR formed so as to be able to receive an adhesive (not shown) for bonding the lens body LS and the lens holding member 2X between the lens body LS and the lens holding member 2X. In the example shown in fig. 17A and 17B, the groove GR is a portion including grooves formed in a spiral shape. The groove GR is formed so as to face a smooth outer peripheral surface ES (see fig. 1B) of the lens body LS.

With the above-described configuration, the adhesive agent stored in each of the storage recess SR (lower storage recess LSR) and the groove GR can firmly adhere the lens body LS to the lens holding member 2X. Even when the cured adhesive (cured adhesive HA) is peeled off from the lens holding member 2X in the accommodating recess SR (lower accommodating recess LSR) and the groove GR, the cured adhesive HA can prevent the lens body LS from peeling off from the lens holding member 2X. This is because the cured adhesive HA in the accommodating recess SR HAs the same shape as the accommodating recess SR at least in a portion located closer to the parting line PL. That is, the cured adhesive HA in the groove GR is restrained from moving in the vertical direction by the shape extending in a spiral shape, and the cured adhesive HA in the lower accommodating recess LSR is restrained from moving in the vertical direction by the shape having the width of the lower end portion larger than the width of the upper end portion. The cured adhesive HA prevents the lens body LS from rotating about the optical axis JD as in the case where only the groove GR is formed on the inner surface SF of the cylindrical portion 12. This is because the up-and-down movement and the rotational movement of the lens body LS are restricted by the cured adhesive HA in the lower accommodating recess LSR.

Therefore, even when the cured adhesive HA in the lower accommodating recess LSR is peeled off from the lens holding member 2, the movement of the lens body LS in the up-down direction with respect to the lens holding member 2X can be restricted by the shape thereof, and the rotation of the lens body LS with respect to the lens holding member 2X about the optical axis JD can be restricted.

In the example shown in fig. 17A and 17B, the inner surface SF of the cylindrical portion 12 is formed to have the groove GR on the upper inner surface USF and the substantially trapezoidal accommodating recess SR (lower accommodating recess LSR) on the lower inner surface LSF, but may be formed to have the substantially trapezoidal accommodating recess SR (upper accommodating recess USR) on the upper inner surface USF and the groove GR on the lower inner surface LSF. In either case, however, it is preferable that the adhesive for adhering the inner surface SF of the tubular portion 12 to the lens body LS is supplied from the groove GR side and supplied to the substantially trapezoidal accommodating recess SR through the groove GR.

Next, another configuration example of the accommodating recess SR will be described with reference to fig. 18A to 18F. Fig. 18A to 18F are diagrams showing 6 configuration examples of the accommodating recess SR. Specifically, fig. 18A is a front view of the accommodating recess SR, which corresponds to an enlarged view of the range R4 surrounded by the one-dot chain line shown in fig. 16B. Similarly, fig. 18B to 18F are front views of the housing concave portions SRb to SRf, and correspond to fig. 18A. In addition, the accommodating recess SR to the accommodating recess SRb to the accommodating recess SRf shown in fig. 18A to 18F are all formed to have the same depth DP.

In the example shown in fig. 18A, the accommodating recess SR includes an upper accommodating recess USR and a lower accommodating recess LSR. The upper accommodating recess USR has a lower end portion in contact with the parting line PL and an upper end portion in contact with the upper surface of the cylindrical portion 12. The lower accommodating recess LSR has an upper end portion in contact with the parting line PL and a lower end portion in contact with the lower surface of the cylindrical portion 12. The upper accommodating recess USR is formed such that the width W1 of the lower end is smaller than the width W2 of the upper end, and the lower accommodating recess LSR is formed such that the width W3 of the upper end is smaller than the width W4 of the lower end.

In the example shown in fig. 18B, the accommodation recess SRb includes an upper accommodation recess USRb and a lower accommodation recess LSRb. The accommodating recess SRb differs from the accommodating recess SR shown in fig. 18A in that the position of the upper accommodating recess USRb in the circumferential direction is offset from the position of the lower accommodating recess LSRb in the circumferential direction in the inner surface SF of the cylindrical portion 12, and is the same at other points.

Specifically, the lower end of the upper accommodating recess USRb and the upper end of the lower accommodating recess LSRb have overlapping portions overlapping across the width W5. On the other hand, the lower end of the upper accommodating recess USRb has a non-overlapping portion of a width W6 that does not overlap with the upper end of the lower accommodating recess LSRb on the left side of the overlapping portion, and the upper end of the lower accommodating recess LSRb has a non-overlapping portion of a width W7 that does not overlap with the lower end of the upper accommodating recess USRb on the right side of the overlapping portion.

The lower end of the upper accommodating recess USRb may have a non-overlapping portion on both sides of the overlapping portion. That is, the upper end portion of the lower accommodating recess LSRb may overlap with a part of the lower end portion of the upper accommodating recess USRb over the entire width thereof. Similarly, the upper end portion of the lower accommodating recess LSRb may have a non-overlapping portion on both sides of the overlapping portion. That is, the lower end portion of the upper accommodating recess USRb may overlap with a part of the upper end portion of the lower accommodating recess LSRb over the entire width thereof.

In the example shown in fig. 18C, the accommodation recess SRc includes an upper accommodation recess USRc and a lower accommodation recess LSRc. The accommodating recess SRc is different from the accommodating recess SR shown in fig. 18A in that the left end portion and the right end portion of the upper accommodating recess USRc include portions extending straight upward, but is the same at other points.

Specifically, the upper accommodating recess USRc is formed such that the width W8 of the lower end portion is smaller than the width W9 of the upper end portion. Further, the upper accommodating recess USRc extends further upward while extending in the circumferential direction after extending straight upward from the parting line PL to the position of the height H1.

In the example shown in fig. 18D, the accommodation recess SRd includes an upper accommodation recess USRd and a lower accommodation recess LSRd. The accommodating recess SRd is different from the accommodating recess SR shown in fig. 18A in that the upper accommodating recess USRd extends upward in a stepped manner from the parting line PL, but is otherwise the same.

Specifically, the upper accommodating recess USRd is formed such that the width W10 of the lower end portion is smaller than the width W11 of the upper end portion. The upper accommodating recess USRd is formed to extend straight upward from the parting line PL and then to extend straight in the circumferential direction, and the upward extension and the circumferential extension are overlapped twice.

In the example shown in fig. 18E, the accommodation recess SRe includes an upper accommodation recess USRe and a lower accommodation recess LSRe. The accommodating recess SRe is different from the accommodating recess SR shown in fig. 18A in that the left end portion of the upper accommodating recess USRe extends straight upward from the parting line PL and the right end portion of the lower accommodating recess LSRe extends straight downward from the parting line PL, but is the same in other points.

Specifically, the upper accommodating recess USRe is formed such that the width W12 of the lower end portion is smaller than the width W13 of the upper end portion. The lower accommodating recess LSRe is formed such that the width W12 of the upper end portion is smaller than the width W14 of the lower end portion.

In the example shown in fig. 18F, the accommodation recess SRf includes an upper accommodation recess USRf and a lower accommodation recess LSRf. The accommodating recess SRf differs from the accommodating recess SR shown in fig. 18A in that the upper accommodating recess USRf extends straight upward from the parting line PL, the lower accommodating recess LSRf extends straight downward from the parting line PL, and the positions of the upper accommodating recess USRf in the circumferential direction and the lower accommodating recess LSRf in the circumferential direction are shifted from each other.

Specifically, the lower end of the upper accommodating recess USRf and the upper end of the lower accommodating recess LSRf have overlapping portions that overlap across the width W15. On the other hand, the lower end of the upper accommodating recess USRf has a non-overlapping portion of a width W16 that does not overlap with the upper end of the lower accommodating recess LSRf on the left side of the overlapping portion, and the upper end of the lower accommodating recess LSRf has a non-overlapping portion of a width W17 that does not overlap with the lower end of the upper accommodating recess USRf on the right side of the overlapping portion.

Similar to the accommodating recess SR shown in fig. 18A, the accommodating recesses SRb to SRf shown in fig. 18B to 18F can prevent the lens body LS from coming off the lens holding member 2 even when the cured adhesive HA is peeled off the lens holding member 2. This is because the cured adhesive HA HAs the same shape as each of the accommodating concave portions SRb to SRf at least in a portion located closer to the parting line PL. That is, the cured adhesive HA in each of the upper accommodating recess USRb to the upper accommodating recess USRe is restricted from moving downward by the shape in which the width of the upper end portion is larger than the width of the lower end portion. The reason is that the cured adhesive HA in each of the lower accommodating recess LSRb to the lower accommodating recess LSRe is restricted from moving upward by the shape in which the width of the lower end portion is larger than the width of the upper end portion.

Further, in the accommodating recess SRb, there is a non-overlapping portion where the lower end portion of the upper accommodating recess USRb and the upper end portion of the lower accommodating recess LSRb do not overlap, so that the movement of the cured adhesive HA in the up-down direction in the accommodating recess SRb is restricted.

Similarly, in the accommodating recess SRf, there is a non-overlapping portion where the lower end portion of the upper accommodating recess USRf and the upper end portion of the lower accommodating recess LSRf do not overlap, and therefore movement of the cured adhesive HA in the up-down direction in the accommodating recess SRf is restricted.

In the example shown in fig. 18A, the accommodating recess SR includes the upper accommodating recess USR and the lower accommodating recess LSR, but as in the example shown in fig. 17A and 17B, the upper accommodating recess USR may be replaced with a groove GR including a spiral groove. The accommodation recess SR may be replaced with a groove GR including a spiral groove in the lower accommodation recess LSR. The same applies to the examples shown in fig. 18B to 18F.

Next, still another configuration example of the accommodating recess SR will be described with reference to fig. 19A to 19E. Fig. 19A to 19E are diagrams showing 4 configuration examples of the accommodating recess SR. Specifically, fig. 19A is a front view of the accommodating recess SRh, and corresponds to fig. 18A. Fig. 19B shows a cross section of the lens holding member 2 (accommodating recess SRh) on a virtual plane including the one-dot chain line L2 and the optical axis JD shown in fig. 19A, corresponding to an enlarged view of a range R5 surrounded by the one-dot chain line shown in fig. 16B. Fig. 19C to 19E are cross-sectional views of the housing concave portions SRi to SRk, corresponding to fig. 19B. Further, the housing concave portions SRh to SRk shown in fig. 19A to 19E are each formed to have the same width W21 in the circumferential direction as shown in fig. 19A.

In the example shown in fig. 19A and 19B, the accommodating recess SRh includes an upper accommodating recess USRh and a lower accommodating recess LSRh. The upper accommodating recess USRh has a lower end portion that contacts the parting line PL and an upper end portion that contacts the upper surface of the cylindrical portion 12. The lower accommodating recess LSRh has an upper end portion that contacts the parting line PL and a lower end portion that contacts the lower surface of the cylindrical portion 12. The accommodating recess SRh is formed such that the widths W21 of the lower end and the upper end of the upper accommodating recess USRh and the widths W21 of the upper end and the lower end of the lower accommodating recess LSRh are equal to each other.

The upper accommodating recess USRh is formed such that the depth DP1 of the lower end portion is smaller than the depth DP2 of the upper end portion, and the lower accommodating recess LSRh is formed such that the depth DP1 of the upper end portion is smaller than the depth DP3 of the lower end portion.

In the example shown in fig. 19A and 19B, the accommodating recess SRh is formed to have the same size as the depth DP2 and the depth DP3, but the depth DP2 and the depth DP3 may have different sizes from each other.

In the example shown in fig. 19C, the accommodating recess SRi includes an upper accommodating recess USRi and a lower accommodating recess LSRi. The accommodating recess SRi differs from the accommodating recess SRh shown in fig. 19B in that the depth DP4 of the lower end portion of the upper accommodating recess USRi is different from the depth DP5 of the upper end portion of the lower accommodating recess LSRi, and is the same at other points.

Specifically, the depth DP4 of the lower end portion of the upper accommodating recess USRi is smaller than the depth DP5 of the upper end portion of the lower accommodating recess LSRi. The depth DP4 of the lower end portion of the upper accommodating recess USRi is smaller than the depth DP6 of the upper end portion of the upper accommodating recess USRi, and the depth DP5 of the upper end portion of the lower accommodating recess LSRi is smaller than the depth DP7 of the lower end portion of the lower accommodating recess LSRi.

In the example shown in fig. 19C, the depth DP4 is smaller than the depth DP5, but the depth DP4 may be larger than the depth DP 5. The depth DP6 of the accommodating recess SRi is smaller than the depth DP7, but the depth DP6 may be the same as the depth DP7 or larger than the depth DP 7.

In the example shown in fig. 19D, the accommodating recess SRj includes an upper accommodating recess USRj and a lower accommodating recess LSRj. The accommodating recess SRj is different from the accommodating recess SRh shown in fig. 19B in that it includes a portion where the depth of the upper accommodating recess USRj does not change in the up-down direction, and is the same at other points.

Specifically, the upper accommodating recess USRj is formed such that the depth DP8 of the lower end portion is smaller than the depth DP9 of the upper end portion. The upper accommodating recess USRj is formed so that the depth DP8 does not change from the parting line PL upward to the position of the height H2. The upper accommodating recess USRj is formed to be deep at a predetermined gradient from the position of the height H2 to the upper end portion.

In the example shown in fig. 19E, the accommodating recess SRk includes an upper accommodating recess USRk and a lower accommodating recess LSRk. The accommodating recess SRk is different from the accommodating recess SRh shown in fig. 19B in that the upper accommodating recess USRk is deepened in a stepwise manner from the parting line PL upward, and is the same at other points.

Specifically, the upper accommodating recess USRk is formed such that the depth DP10 of the lower end portion is smaller than the depth DP12 of the upper end portion. The upper accommodating recess USRk is formed so that the depth DP10 does not change from the parting line PL upward to the position of the height H3. The upper accommodating recess USRk is formed to have a depth DP11 at the height H3, and the depth DP11 does not change from the parting line PL to the position of the height H4. The upper accommodating recess USRk is formed to have a depth DP12 at the height H4, and the depth DP12 does not change until reaching the upper end.

As in the case of the accommodating recess SR shown in fig. 18A, the accommodating recesses SRh to SRk shown in fig. 19A to 19E can prevent the lens body LS from coming off the lens holding member 2 even when the cured adhesive HA is peeled off from the lens holding member 2. The cured adhesive HA HAs the same shape as each of the accommodating recessed portions SRh to SRk at least at a portion located closer to the parting line PL. That is, the cured adhesive HA in each of the upper accommodating recess USRh to the upper accommodating recess USRk is restricted from moving downward by the shape that the depth of the upper end portion is larger than the depth of the lower end portion. The reason is that the cured adhesive HA in each of the lower accommodating recess LSRh to the lower accommodating recess LSRk is restricted from moving upward by the shape in which the depth of the lower end portion is greater than the depth of the upper end portion.

In the example shown in fig. 19A and 19B, the accommodation recess SRh includes the upper accommodation recess USRh and the lower accommodation recess LSRh, but as in the example shown in fig. 17A and 17B, the upper accommodation recess USRh may be replaced with a groove GR including a spiral groove. The accommodation recess SRh may be replaced with a groove GR including a spiral groove in the lower accommodation recess LSRh. The same applies to the examples shown in fig. 19C to 19E.

As described above, the lens driving device 101 includes the fixed-side member RG including the housing member 4 as the housing HS, the lens holding member 2 which is disposed in the housing HS and can hold the lens body LS, and the driving mechanism MK which moves the lens holding member 2 with respect to the fixed-side member RG. The lens body LS is fixed to the lens holding member 2 with an adhesive.

The lens holding member 2 has a cylindrical portion 12 extending in the optical axis direction (up-down direction) and capable of disposing the lens body LS inside. Specifically, a parting line PL, which is a seam of a mold at the time of molding the lens holding member 2, is formed in the center portion of the cylindrical portion 12 in the optical axis direction on the inner surface SF of the cylindrical portion 12. Further, a receiving recess SR capable of receiving an adhesive is formed in each of the upper inner surface USF of the cylindrical portion 12 located above the parting line PL and the lower inner surface LSF of the cylindrical portion 12 located below the parting line PL. The shape of each storage recess SR is configured to be engaged with the shape of the adhesive stored in the storage recess SR, so that the movement in the up-down direction of the lens body LS relative to the lens holding member 2 can be restricted.

For example, in the example shown in fig. 18A, since a part of the cured adhesive HA stored in the upper storage recess USR HAs a shape in which the width of the upper end portion is larger than the width of the lower end portion, the part of the cured adhesive HA is engaged with the upper storage recess USR and is restricted from moving downward. Further, since a part of the cured adhesive HA stored in the lower storage recess LSR HAs a shape in which the width of the lower end portion is larger than the width of the upper end portion, the part of the cured adhesive HA bites into the lower storage recess LSR and is restrained from moving upward. The same applies to the examples shown in fig. 18B to 18E.

In the example shown in fig. 18B, since a part of the cured adhesive HA stored in the upper storage recess USRb HAs a width of the lower end portion larger than the width W5 of the overlapping portion, the part of the cured adhesive HA is engaged with the upper storage recess USRb and is restricted from moving downward. Further, since the width of the upper end portion of the part of the cured adhesive HA stored in the lower storage recess LSRb is larger than the width W5 of the overlapping portion, the part of the cured adhesive HA is engaged with the lower storage recess LSRb, and the upward movement is restricted. Similarly, in the example shown in fig. 18F, since the width of the lower end portion of the cured adhesive HA stored in the upper storage recess USRf is larger than the width W15 of the overlapping portion, the portion of the cured adhesive HA is engaged with the upper storage recess USRf, and the downward movement is restricted. Further, since the width of the upper end portion of the part of the cured adhesive HA stored in the lower storage recess LSRf is larger than the width W15 of the overlapping portion, the part of the cured adhesive HA is engaged with the lower storage recess LSRf, and the upward movement is restricted.

With this structure, even when the adhesive (the cured adhesive HA stored in the storage recess SR) that adheres the lens body LS and the lens holding member 2 to each other is peeled off from the lens holding member 2, the lens holding member 2 can firmly hold the lens body LS. This is because the engagement between the accommodating recess SR and the cured adhesive HA restricts the relative vertical movement between the lens body LS and the lens holding member 2, and the coupling between the lens body LS (the cured adhesive HA attached to the lens body LS) and the lens holding member 2 is maintained.

Further, at least one of the accommodating recess SR (upper accommodating recess USR) on the upper inner surface USF and the accommodating recess SR (lower accommodating recess LSR) on the lower inner surface LSF may be configured such that, for example, all of the cross sections parallel to the parting line at the positions closer to the parting line PL overlap with the cross sections parallel to the parting line at the positions farther from the parting line PL in the direction perpendicular to the parting line.

This is because, in the case of manufacturing the lens holding member 2 by injection molding, it is desirable to separate a mold used when injection molding the lens holding member 2 from the lens holding member 2 in a direction away from the parting line PL (parting plane) after injection molding.

For example, in the example shown in fig. 17A and 17B, the lower accommodating recess LSR on the lower inner surface LSF is configured such that all of the cross section parallel to the parting plane of the upper end portion at a position closer to the parting line PL overlaps the cross section parallel to the parting plane of the lower end portion at a position farther from the parting line PL in the direction perpendicular to the parting plane.

In the example shown in fig. 18A, the lower accommodating recess LSR on the lower inner surface LSF is configured such that all of the upper cross sections (cross sections of the width W3 and the depth DP) parallel to the parting plane, which are the upper end portions at positions closer to the parting line PL, overlap the lower cross sections (cross sections of the width W4 and the depth DP) parallel to the parting plane, which are the lower end portions at positions farther from the parting line PL, in the direction perpendicular to the parting plane. That is, the lower accommodating recess LSR is configured such that, in a plan view as seen from the Z2 side, all of the upper cross section (cross section of the width W3 and the depth DP) overlaps with a part of the lower cross section (cross section of the width W4 and the depth DP). The same applies to the examples shown in fig. 18B to 18E.

In the example shown in fig. 18F, the upper accommodating recess USRf on the upper inner surface USF is configured such that all of the cross sections (the cross sections of the widths w15+w16 and the depths DP) parallel to the parting plane, which are the lower end portions at positions closer to the parting line PL, overlap the cross sections (the cross sections of the widths w15+w16 and the depths DP) parallel to the parting plane, which are the upper end portions at positions farther from the parting line PL, in the direction perpendicular to the parting plane. That is, the upper accommodating recess USRf is configured such that, in a plan view as seen from the Z1 side, all of the lower cross section (the cross section of the width w15+w16 and the depth DP) overlaps all of the upper cross section (the cross section of the width w15+w16 and the depth DP).

With this structure, the lens holding member 2 can be easily manufactured by injection molding using a plurality of molds. In addition, even when the adhesive (the cured adhesive HA stored in the storage recess SR) that adheres the lens body LS and the lens holding member 2 to each other is peeled off from the lens holding member 2, the lens holding member 2 can firmly hold the lens body LS. This is because the engagement between the receiving recess SR and the cured adhesive HA maintains the bonding between the cured adhesive HA and the lens holding member 2, which are adhered to the lens body LS.

Specifically, for example, as shown in fig. 18A to 18E, the at least one accommodating recess SR may be configured such that the width dimension at a position farther from the parting line PL is larger than the width dimension at a position closer to the parting line PL.

Alternatively, as shown in fig. 19B to 19E, the depth dimension DP of the at least one accommodating recess SR may be larger at a position farther from the parting line PL than at a position closer to the parting line PL.

In the above-described configuration, even when the adhesive (the cured adhesive HA stored in the storage recess SR) that adheres the lens body LS and the lens holding member 2 is peeled off from the lens holding member 2, the lens holding member 2 can firmly hold the lens body LS. This is because the bonding of the lens body LS and the lens holding member 2 is maintained by curing the adhesive HA. For example, even if the lens holding member 2 is peeled off from the interface on the inner surface SF of the cylindrical portion 12 by applying a strong impact such as dropping, the movement of the lens body LS in the optical axis direction and the rotation of the lens body LS around the optical axis JD can be suppressed by engagement of the accommodating recess SR with the cured adhesive HA. The adhesive does not have to completely fill the accommodating recess SR, and may be disposed in the accommodating recess SR in an amount sufficient to suppress movement of the lens body LS in the optical axis direction with respect to the lens holding member 2 and rotation of the lens body LS about the optical axis JD.

The at least one accommodating recess SR is preferably provided in plural in a circumferentially spaced manner in the tubular portion 12. For example, in the above embodiment, as shown in fig. 15B, 20 accommodating recesses SR are provided at intervals of every angle α along the circumference of a circle centered on the optical axis JD. With this structure, the lens holding member 2 can more reliably suppress the movement of the lens body LS in the optical axis direction with respect to the lens holding member 2 and the rotation of the lens body LS around the optical axis JD.

The accommodating recess SR is preferably formed on both the upper inner surface USF and the lower inner surface LSF. The upper accommodating recess USR on the upper inner surface USF and the lower accommodating recess LSR on the lower inner surface LSF are each configured such that all of the cross sections parallel to the parting plane at positions closer to the parting line PL overlap with the cross sections parallel to the parting plane at positions farther from the parting line PL in the direction perpendicular to the parting plane. With this structure, the lens holding member 2 can be easily manufactured by injection molding using a plurality of molds. Further, the lens holding member 2 can more reliably restrict the up-and-down movement of the lens body LS with respect to the optical axis direction of the lens holding member 2. This is because the downward movement of the lens body LS with respect to the lens holding member 2 is restricted by the engagement of a part of the cured adhesive HA stored in the upper storage recess USR with the upper storage recess USR, and the upward movement of the lens body LS with respect to the lens holding member 2 is restricted by the engagement of a part of the cured adhesive HA stored in the lower storage recess LSR with the lower storage recess LSR.

Preferably, at least a part of the lower end (narrow width portion) of the accommodating recess SR (upper accommodating recess USR) on the upper inner surface USF and at least a part of the upper end (narrow width portion) of the accommodating recess SR (lower accommodating recess LSR) on the lower inner surface LSF are opposed to each other with the parting line PL interposed therebetween. That is, the upper accommodating recess USR and the lower accommodating recess LSR are spatially connected at the parting line PL. With this configuration, the adhesive for bonding the lens body LS and the lens holder 2 can be supplied to the lower accommodating recess LSR via the upper accommodating recess USR or supplied to the upper accommodating recess USR via the lower accommodating recess LSR.

A part of the lower end portion of the accommodating recess SR (upper accommodating recess USR) on the upper inner surface USF and a part of the upper end portion of the accommodating recess SR (lower accommodating recess LSR) on the lower inner surface LSF may be opposed to each other with the parting line PL interposed therebetween. The lower end of the upper accommodating recess USR may have a portion that does not face the upper end of the lower accommodating recess LSR with the parting line PL interposed therebetween. The upper end of the lower accommodating recess LSR may have a portion that does not face the lower end of the upper accommodating recess USR with the parting line PL interposed therebetween.

For example, in the example shown in fig. 18F, a part of the lower end portion of the upper accommodating recess USRf and a part of the upper end portion of the lower accommodating recess LSRf face each other across the width W15 with the parting line PL interposed therebetween. With this configuration, the adhesive for bonding the lens body LS and the lens holding member 2 can be supplied to the lower accommodating recess LSRf via the upper accommodating recess USRf, or can be supplied to the upper accommodating recess USRf via the lower accommodating recess LSRf.

In the example shown in fig. 18F, the lower end portion of the upper accommodating recess USRf has a portion (a portion facing the upper end portion of the lower side contact portion LCS) of the width W16 which is not facing the upper end portion of the lower accommodating recess LSRf with the parting line PL interposed therebetween. The upper end of the lower accommodating recess LSRf has a portion (a portion facing the lower end of the upper contact portion UCS) of the width W17 that is not facing the lower end of the upper accommodating recess USRf with the parting line PL interposed therebetween. With this configuration, even when the adhesive (the cured adhesive HA stored in the storage recess SR) that adheres the lens body LS and the lens holding member 2 is peeled off from the lens holding member 2, the lens holding member 2 can still firmly hold the lens body LS. This is because the engagement of the cured adhesive HA with the accommodating recess SR (contact portion CS) maintains the coupling of the lens body LS and the lens holding member 2.

Further, the accommodating recess SR (accommodating recess SRf) may be configured such that only the lower end portion of the upper accommodating recess USRf has a portion (portion facing the upper end portion of the lower-side contact portion LCS) that does not face the upper end portion of the lower accommodating recess LSRf with the parting line PL interposed therebetween. That is, the accommodating recess SR may be formed such that the upper end of the lower accommodating recess LSRf faces the lower end of the upper accommodating recess USRf over the entire width thereof.

Alternatively, the accommodating recess SR may be configured such that only the upper end portion of the lower accommodating recess LSRf has a portion (a portion facing the lower end portion of the upper-side contact portion UCS) that does not face the lower end portion of the upper accommodating recess USRf with the parting line PL interposed therebetween. That is, the accommodating recess SR may be formed such that the lower end portion of the upper accommodating recess USRf faces the upper end portion of the lower accommodating recess LSRf across the entire width thereof.

Alternatively, the lower end portion of the upper accommodating recess USRf and the upper end portion of the lower accommodating recess LSRf may be configured so as not to face each other across the parting line PL. That is, the accommodating recess SR may be formed such that the lower end portion of the upper accommodating recess USRf faces the upper end portion of the lower side contact portion LCS over the entire width thereof, and the upper end portion of the lower accommodating recess LSRf faces the lower end portion of the upper side contact portion UCS over the entire width thereof.

The receiving recess SR formed in one of the upper inner surface USF and the lower inner surface LSF may be configured such that all of the cross section parallel to the parting plane at a position closer to the parting line PL overlaps the cross section parallel to the parting plane at a position farther from the parting line PL in the direction perpendicular to the parting plane, and the receiving recess SR formed in the other of the upper inner surface USF and the lower inner surface LSF may be configured by a spiral groove. Further, since the spiral groove is processed by punching while rotating the die having the spiral concave-convex portion formed thereon, the processing is easier than the case of forming a plurality of annular grooves in parallel.

For example, as shown in fig. 17A and 17B, a groove portion GR including a spiral groove may be formed on the upper inner surface USF, and a receiving recess SR (lower receiving recess LSR) may be formed on the lower inner surface LSF. In this configuration, the adhesive is supplied from above to the groove GR in a state where the lens body LS is disposed inside the cylindrical portion 12 of the lens holding member 2, and reaches the lower accommodating recess LSR through the groove GR. Therefore, this structure facilitates the supply of the adhesive from above.

The accommodating recess SR may be configured such that the width dimension increases as it moves away from the parting line PL. In this structure, the opening of the housing recess SR is large when viewed from directly above or directly below, so that the adhesive is easily supplied.

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

For example, in the above embodiment for realizing the auto focus adjustment function, the 1 st lower leaf spring 26A and the extension 33A are electrically and mechanically connected, and the 2 nd lower leaf spring 26B and the extension 33B are electrically and mechanically connected, but the present invention is not limited to this configuration. The present invention may be configured to divide the upper plate spring 16 into two parts, one of which is electrically and mechanically connected to the extension 33A and the other of which is electrically and mechanically connected to the extension 33B, for example, in the lens driving device with the shake correction function. In this configuration, the upper leaf spring 16 is disposed so as to connect the magnet holder as a support member to the lens holding member 2, and is configured to support the lens holding member 2 so as to be movable in the optical axis direction. In this case, the upper plate spring 16 includes an inner portion 16i as a 1 st support portion fixed to the lens holding member 2, an outer portion 16e as a 2 nd support portion fixed to the magnet holder, and an elastic arm portion 16g located between the inner portion 16i and the outer portion 16 e. The magnet holder is a member for holding the magnet 5 facing the coil 3 held by the lens holding member 2, and is typically connected to the base member 18 via a suspension wire, and is supported by the suspension wire so as to be movable in a direction perpendicular to the optical axis direction. Specifically, the magnet support is configured to be movable in a direction perpendicular to the optical axis direction by a driving mechanism including a magnet 5 and a coil different from the coil 3 provided on the base member 18 so as to face the magnet 5. In this configuration, a flange portion having a notch portion may be provided on the upper end portion side (Z1 side) of the lens holding member 2. The protruding portion 72 is provided so as to protrude upward from an upper end portion, which is one end portion of the lens holding member 2 in the optical axis direction, on the side where the upper leaf spring 16 is disposed. The magnet holder functions as a fixed-side member that does not move in the optical axis direction with respect to the lens holding member that moves in the optical axis direction.

In the above embodiment, the coil 3 is wound around the outer peripheral surface of the lens holder 2 in an octagonal ring shape. However, the present invention is not limited to this configuration. The coil 3 may be a coil having an oblong or oval (elliptical) coil body held on the side surface of the lens holding member 2, that is, a coil body having a central axis arranged perpendicular to the optical axis direction. Specifically, the coil 3 may be a coil having four elliptical coil body portions held by four side surfaces of the lens holding member 2 having a coil support portion 12j having an outer shape that is seen as a substantially rectangular shape, or may be a coil having two elliptical coil body portions held by two opposing side surfaces of the four side surfaces of the lens holding member 2. In this case, the 1 st magnet 5A may be a combination of two diode magnets or may be a single quadrupole magnet. The same applies to the 2 nd magnet 5B.

The magnets 5 are disposed so as to face two of the four sides of the lens holding member 2, but may be disposed so as to face the four sides, respectively, or may be disposed so as to face the four corner walls, respectively.

In the above-described embodiment, the driving mechanism MK is configured to use the coil 3 provided on the lens holding member 2 and the magnet 5 disposed so as to face the coil 3, but other driving methods such as a piezoelectric method may be used. In the case of using a piezoelectric system, the case member 4 may be formed of a magnetic metal.

The present application claims priority based on japanese patent application No. 2020-209748, filed on even 17, 12/2020, the entire contents of which are incorporated herein by reference.

Description of the reference numerals

1. Spacer; 2. 2X. Lens a holding member; 2t & ltSum & gt & lt/Sum > 3.coil; 4. Housing parts; 4A. Outer peripheral wall portion; 4A 1. 1 st side plate portion; 4A 2. Cndot. 4 2 side plate parts; 4A 3. 3 rd side plate portion; 4 A4. 4 th side plate portion; 4B & lt- & gt top plate part; 4k · · an opening; 4s··housing part; 5. Magnet; 5A. 1 st magnet; 5B. 2 nd magnet; 6. Leaf spring; 7. Metal parts; 7A. 1 st metal part; 7 AP. Exposure part; 7 AT. A terminal portion; 7B. 2a metal component; 7BP & ltSu & gt & lt/EN > 7BT & lt & gt terminal portion; 7C 3 rd metal part; 7CP a connection part; 7D 4 th metal part; 7 DP. A connection part; 7DT terminal portions; 12. Cylindrical portion; 12 d. Stand portion; 12 dh. Pit; 12h eave; 12j · wire a ring support; 13.A winding part; 16.upper leaf spring; 16b · · a corner portion; 16e · · an outer portion; 16 g. Elastic arm; 16i · an inner portion; 16r · · a cross brace part; 18. Base member; 18k · an opening; 18t & ltSum & gt & lt/Sum > 26 lower leaf springs; 26A. 1 st lower leaf spring; 26B & lt 2 & gt lower leaf spring; 26c inner binding moiety; 26 d. Outside an engagement portion; 26e an outer portion; 26 g. Elastic arm; 26 h.connecting plate portion; 26 i- & an inner portion; 26p · carrying out the following a connecting part; 26r · carrying out the following a through hole; 26s · · a through hole; 33. 33A, 33B extension; 33c opposed portions; 33k··insertion portion; 33m winding part; 52. Flange portion; 52k · · a notch portion; 72. 72A, 72B; 82.jetty; 82s··housing part; 101. Lens a driving device; AD.adhesive; CA conductive adhesive; CS contact; ES. Outer peripheral surface; GR. A groove portion; HA. Cure an adhesive; HA 1. 1 st curing adhesive; HS. Case; JD. An optical axis; LCS lower contact; LS. Lens; lsf··lower inner surface; LSR, LSRb-LSRf, LSRh-LSRk lower side accommodation recess; MK. Drive mechanism; PL. A parting line; RG. Fixed a side member; SF. Inner surface; SR, SRb to SRf, SRh to SRk; UCS upper contact portion; USF & ltSUP & gt & lt/SUP & gt-upper inner surface; USR, USRb to USRf, USRh to USRk.

Claims

1. A lens driving device is provided with:

a fixed side member including a housing;

a lens holding member disposed in the housing and configured to hold a lens body; and

a driving mechanism for moving the lens holding member relative to the fixed-side member;

the lens body is fixed on the lens holding component through an adhesive;

it is characterized in that the method comprises the steps of,

the lens holding member has a cylindrical portion extending in a vertical direction as an optical axis direction and capable of disposing the lens body inside;

a parting line as a seam of a mold for molding the lens holding member is formed in a central portion of the cylindrical portion in the optical axis direction on an inner surface of the cylindrical portion;

a receiving recess capable of receiving the adhesive is formed in each of an upper inner surface of the cylindrical portion located above the parting line and a lower inner surface of the cylindrical portion located below the parting line;

the shape of the receiving recess is engaged with the shape of the adhesive received in the receiving recess to restrict movement of the lens body in the up-down direction relative to the lens holding member.

2. The lens driving apparatus according to claim 1, wherein,

the receiving recess on the upper inner surface and the receiving recess on the lower inner surface are configured such that all of a cross section parallel to the parting plane at a position closer to the parting line overlaps a cross section parallel to the parting plane at a position farther from the parting line in a direction perpendicular to the parting plane.

3. The lens driving apparatus according to claim 2, wherein,

the receiving recess of at least one of the above-mentioned members is formed such that a width dimension of a position farther from the parting line is larger than a width dimension of a position closer to the parting line;

or the receiving recess of at least one of the above-mentioned members is formed such that a depth dimension of a position farther from the parting line is larger than a depth dimension of a position nearer to the parting line.

4. A lens driving apparatus according to claim 2 or 3, wherein,

the plurality of receiving recesses are provided so as to be separated from each other in the circumferential direction of the cylindrical portion.

5. The lens driving apparatus according to claim 1 or 2, wherein,

the receiving recess in the upper inner surface and the receiving recess in the lower inner surface are each configured such that a cross section parallel to the parting line at a position closer to the parting line overlaps a cross section parallel to the parting line at a position farther from the parting line in a direction perpendicular to the parting line.

6. The lens driving apparatus according to claim 5, wherein,

at least a part of the lower end of the receiving recess on the upper inner surface and at least a part of the upper end of the receiving recess on the lower inner surface are opposed to each other with the parting line interposed therebetween.

7. The lens driving apparatus according to claim 6, wherein,

a part of a lower end portion of the accommodating recess on the upper inner surface is opposed to a part of an upper end portion of the accommodating recess on the lower inner surface with the parting line interposed therebetween, the lower end portion of the accommodating recess on the upper inner surface has a portion which is opposed to the upper end portion of the accommodating recess on the lower inner surface with the parting line interposed therebetween, and the upper end portion of the accommodating recess on the lower inner surface has a portion which is opposed to the lower end portion of the accommodating recess on the upper inner surface with the parting line interposed therebetween.

8. The lens driving apparatus according to claim 1 or 2, wherein,

the receiving recess formed in one of the upper inner surface and the lower inner surface is configured such that all of a cross section parallel to the parting line at a position closer to the parting line overlaps a cross section parallel to the parting line at a position farther from the parting line in a direction perpendicular to the parting line, and the receiving recess formed in the other of the upper inner surface and the lower inner surface is configured with a spiral groove.

9. The lens driving apparatus according to claim 8, wherein,

the spiral groove is formed in the upper inner surface.

10. The lens driving apparatus according to any one of claims 1 to 9, wherein,

the receiving recess is configured such that a width dimension increases as it is away from the parting line.

11. A camera module, comprising:

the lens driving apparatus according to any one of claims 1 to 10;

the lens body; and

an imaging element is disposed opposite to the lens body.