Lens driving device and camera module

Abstract

The invention provides a lens driving device which improves the bonding strength between a lens body and a lens holding component. The lens driving device (101) includes a fixing side member (FB), a lens holding member (2) having a cylindrical portion (2C) capable of fixing a lens body (LS) with an adhesive, and a driving portion (DM) that moves the lens holding member (2) with respect to the fixing side member (FB). The lens holding member (2) is formed from a synthetic resin in which a metal joined body (MA) is embedded. The metal body to be connected (MA) has an embedded portion (EM) embedded in the cylindrical portion (2C) and an exposed portion (EP) exposed on the inner surface of the cylindrical portion (2C), and is configured such that the exposed portion (EP) becomes a portion to be bonded and fixed to the lens body (LS) and is disposed at a position corresponding to a weld line (WL) formed when the lens holding member (2) is molded.

Description

Technical Field

[0001] The present application relates to a lens driving device and a camera module. Background Art

[0002] Conventionally, there is known a lens driving device that uses a voice coil motor to move a lens holder (lens holding member) that holds a lens portion (lens body) (see Patent Document 1). In this lens driving device, the lens body is fixed to the lens holding member by bonding or screwing.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2017 / 175254 Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] Generally, the lens holding member is formed of a synthetic resin. Furthermore, when the lens body is fixed to the lens holding member by an adhesive, if the bonding area between the lens body and the lens holding member becomes smaller as the lens driving device becomes thinner (lower profile in Japanese), there is a risk of insufficient bonding strength and the adhesive peeling off due to impact such as falling. Furthermore, the risk of adhesive peeling off increases as the diameter of the lens body increases (larger image pickup elements become larger).

[0008] Therefore, it is desired to provide a lens driving device capable of improving the bonding strength between the lens body and the lens holding member.

[0009] Means for solving technical problems

[0010] A lens driving device according to an embodiment of the present invention is a lens driving device comprising a fixed side component, a lens holding component having a cylindrical portion capable of fixing a lens body by an adhesive, and a driving portion for moving the lens holding component relative to the fixed side component, wherein the lens holding component is formed of a synthetic resin in which a metal adherend is embedded, the metal adherend having an embedded portion embedded in the cylindrical portion and an exposed portion exposed on the inner surface of the cylindrical portion, the metal adherend being configured such that the exposed portion becomes a portion that is adhesively fixed to the lens body, and is arranged at a position corresponding to a weld line formed when the lens holding component is molded.

[0011] Effects of the Invention

[0012] The above-mentioned lens driving device can improve the bonding strength between the lens body and the lens holding member. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective view of a camera module including the lens driving device according to the embodiment of the present application.

[0014] Figure 2 yes Figure 1 An exploded perspective view of the lens driving device shown.

[0015] Figure 3 It is a three-dimensional view of a lens holding member, a movable-side metal member, a leaf spring, a first magnetic member, and a metal adhered body (Japanese: metal adhered body).

[0016] Figure 4 This is a three-dimensional view of the fixed-side metal component, leaf spring, base component, and conductive component.

[0017] Figure 5 It is a right side view and a front view of a metal component and a shape memory alloy wire.

[0018] Figure 6 It is a three-dimensional diagram of a metal component, a leaf spring, a conductive component, a metal connected body, and a shape memory alloy wire.

[0019] Figure 7 It is a top view of the metal parts, leaf springs and metal connected bodies.

[0020] Figure 8 It is a three-dimensional view and a top view of the first magnetic component and the conductive component.

[0021] Fig. 9 The present invention is a perspective view and a cross-sectional view of a lens holding component in which a metal adhered body is embedded.

[0022] Fig.10 4 is a perspective view of a camera module including a lens driving device according to another embodiment of the present application.

[0023] Fig.11 yes Fig.10 An exploded perspective view of the lens driving device shown.

[0024] Fig.12 It is a three-dimensional diagram of a lens holding component, a coil, and a metal connected body.

[0025] Fig.13 It is a perspective view of a part of a lens driving device in which various metal connected bodies are embedded. DETAILED DESCRIPTION

[0026] Hereinafter, a lens driving device 101 according to an embodiment of the present invention will be described with reference to the drawings. Figure 1 It is a perspective view of a camera module CD including the lens driving device 101 . Figure 2 It is an exploded perspective view of the lens driving device 101 .

[0027] exist Figure 1 as well as Figure 2 In , X1 represents one direction of the X axis constituting the three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X axis. In addition, 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. Figure 1 as well as Figure 2 In the figure, 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 (back side) of the lens driving device 101. In addition, 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. In addition, the Z1 side of the lens driving device 101 corresponds to the upper side (the side of the object to be photographed) of the lens driving device 101, and the Z2 side of the lens driving device 101 corresponds to the lower side (the side of the imaging element) of the lens driving device 101. The same is true in other figures.

[0028] like Figure 1 As shown, the camera module CD includes a substrate SB, a lens driving device 101, a lens body LS mounted on the lens driving device 101, and an image pickup element IS mounted on the substrate SB in a manner opposite to the lens body LS. In addition, the camera module CD is connected to a control device composed of a microcomputer including a CPU and a memory. In the example shown in the figure, the control device is arranged outside the camera module CD, but it can also be arranged inside the camera module CD. Figure 1 As shown in FIG. 1 , a lens driving device 101 having a substantially rectangular parallelepiped shape is mounted on a substrate SB on which an image pickup element IS is mounted.

[0029] Specifically, if Figure 1 as well as Figure 2 As shown, the lens driving device 101 includes a cover member 4 as a part of the fixed side member FB. The cover member 4 includes an upper cover member 4U and a lower cover member 4L.

[0030] The cover member 4 is configured to function as a shell covering each member. In the present embodiment, the cover member 4 is formed of a non-magnetic metal. However, the cover member 4 may also be formed of a magnetic metal. Figure 1 As shown, the cover member 4 has a box-shaped outer shape that defines a storage portion 4S.

[0031] like Figure 2As shown, the upper cover part 4U has a first outer peripheral wall portion 4A in the shape of a rectangular cylinder, and a rectangular ring-shaped and flat top plate portion 4B which is continuously provided with the upper end (end on the Z1 side) of the first outer peripheral wall portion 4A. A circular opening 4K is formed in the center of the top plate portion 4B. The first outer peripheral wall portion 4A includes a first side plate portion 4A1 to a fourth side plate portion 4A4. The first side plate portion 4A1 and the third side plate portion 4A3 are opposite to each other, and the second side plate portion 4A2 and the fourth side plate portion 4A4 are opposite to each other. Moreover, the first side plate portion 4A1 and the third side plate portion 4A3 extend perpendicularly relative to the second side plate portion 4A2 and the fourth side plate portion 4A4.

[0032] Likewise, if Figure 2 As shown, the lower cover part 4L has a second outer peripheral wall portion 4C in the shape of a rectangular tube, and a bottom plate portion 4D in the shape of a rectangular ring which is continuously provided with the lower end (the end on the Z2 side) of the second outer peripheral wall portion 4C. A circular opening 4M is formed in the center of the bottom plate portion 4D. The second outer peripheral wall portion 4C includes a first side plate portion 4C1 to a fourth side plate portion 4C4. The first side plate portion 4C1 and the third side plate portion 4C3 are opposite to each other, and the second side plate portion 4C2 and the fourth side plate portion 4C4 are opposite to each other. Moreover, the first side plate portion 4C1 and the third side plate portion 4C3 extend perpendicularly relative to the second side plate portion 4C2 and the fourth side plate portion 4C4.

[0033] like Figure 1 As shown, the upper cover member 4U is bonded to the lower cover member 4L by an adhesive. Furthermore, the second outer peripheral wall portion 4C is arranged so as to partially cover the first outer peripheral wall portion 4A.

[0034] like Figure 2 As shown, the cover member 4 contains the lens holding member 2, the metal member 5, the leaf spring 6, the base member 18, and the shape memory alloy wire SA. The lens holding member 2 is capable of holding the lens body LS (see Figure 1 ) constitutes the movable side member MB. The lens body LS is, for example, a cylindrical lens barrel having at least one lens, and its central axis is configured along the optical axis OA.

[0035] The lens holding member 2 is formed by injection molding a synthetic resin such as a liquid crystal polymer (LCP). Figure 2As shown, the lens holding component 2 includes a cylindrical portion 2C formed in a manner extending along the optical axis OA, and a movable side seat portion 2D and a protruding portion 2S formed to protrude radially outward from the cylindrical portion 2C to a circle centered on the optical axis OA. The movable side seat portion 2D and the protruding portion 2S constitute a part of the cylindrical portion 2C. In this embodiment, a metal adherend MA is buried in the lens holding component 2. Moreover, an adhesive is applied between the lens body LS and the metal adherend MA, and the lens body LS is bonded and fixed to the metal adherend MA and the lens holding component 2 by the adhesive.

[0036] The movable side seat portion 2D includes a first movable side seat portion 2D1 and a second movable side seat portion 2D2. The first movable side seat portion 2D1 and the second movable side seat portion 2D2 are configured to extend in opposite directions to each other in the radial direction across the optical axis OA. Similarly, the protruding portion 2S includes a first protruding portion 2S1 and a second protruding portion 2S2. The first protruding portion 2S1 and the second protruding portion 2S2 are configured to extend in opposite directions to each other in the radial direction across the optical axis OA. Specifically, the movable side seat portion 2D and the protruding portion 2S are configured to correspond to the four corners of the lens holding component 2 having a substantially rectangular shape when viewed from above, and are arranged alternately. Moreover, a portion of the leaf spring 6 is respectively placed on the two movable side seats 2D.

[0037] The driving unit DM is a mechanism for moving the lens holding component 2 relative to the fixed side component FB. In the present embodiment, the driving unit DM includes a shape memory alloy wire SA as an example of a shape memory actuator. Specifically, the shape memory alloy wire SA includes a first wire SA1 to an eighth wire SA8. If an electric current flows, the temperature of the shape memory alloy wire SA rises, and it contracts in accordance with the temperature rise. The driving mechanism DM can utilize the contraction of the shape memory alloy wire SA to move the lens holding component 2 at least up and down along the optical axis OA. In addition, the shape memory alloy wire SA is configured so that if one or more of the first wire SA1 to the eighth wire SA8 contracts, the lens holding component 2 moves, and the movement thereof causes one or more of the other wires to be stretched.

[0038] The leaf spring 6 is configured to support the lens holding member 2 so that it can move relative to the fixed side member FB (base member 18) in a direction parallel to the optical axis OA. In the present embodiment, the leaf spring 6 is made of a metal plate mainly made of a copper alloy, a titanium-copper alloy (titanium-copper), or a copper-nickel alloy (nickel-tin-copper). Specifically, the leaf spring 6 includes a first leaf spring 6A and a second leaf spring 6B.

[0039] The base member 18 is formed by injection molding using a synthetic resin such as a liquid crystal polymer (LCP). In the present embodiment, the base member 18 has a substantially rectangular shape when viewed from above, and has a circular opening 18K in the center. Specifically, the base member 18 has a rectangular ring-shaped base 18B arranged so as to surround the circular opening 18K. Furthermore, the base 18B has four sides 18E (a first side 18E1 to a fourth side 18E4).

[0040] The leaf spring 6 is configured to connect the movable side seat portion 2D formed on the lens holding member 2 and the fixed side seat portion 18D formed on the base member 18. The fixed side seat portion 18D is a portion protruding upward from the base portion 18B of the base member 18, and includes a first fixed side seat portion 18D1 and a second fixed side seat portion 18D2.

[0041] More specifically, the first leaf spring 6A is configured to connect the first movable side seat portion 2D1 formed on the lens holding member 2 to the first fixed side seat portion 18D1 and the second fixed side seat portion 18D2 formed on the base member 18. Similarly, the second leaf spring 6B is configured to connect the second movable side seat portion 2D2 formed on the lens holding member 2 to the first fixed side seat portion 18D1 and the second fixed side seat portion 18D2 formed on the base member 18.

[0042] The metal component 5 is configured to fix the end of the shape memory alloy wire SA. In the present embodiment, the metal component 5 is formed of a non-magnetic metal and includes a fixed side metal component 5F and a movable side metal component 5M. The fixed side metal component 5F is configured to be fixed to the fixed side seat portion 18D of the base component 18. The movable side metal component 5M is configured to be fixed to the movable side seat portion 2D of the lens holding component 2. In addition, the fixed side metal component 5F may be embedded in the fixed side seat portion 18D of the base component 18, and the movable side metal component 5M may be embedded in the movable side seat portion 2D of the lens holding component 2.

[0043] More specifically, the fixed side metal component 5F is also called a fixed side connection plate, and includes a first fixed side metal component 5F1 to an eighth fixed side metal component 5F8. The movable side metal component 5M is also called a movable side connection plate, and includes a first movable side metal component 5M1 to a fourth movable side metal component 5M4.

[0044] Next, refer to Figure 3 The positional relationship between the components provided in the lens holding member 2 and the lens holding member 2 will be described. Figure 3 2 is a perspective view of the lens holding member 2, the movable side metal member 5M, the leaf spring 6, the first magnetic member 10, and the metal contact body MA. Specifically, Figure 3The upper figure (the figure located on the upper side of the hollow arrow) is an exploded stereoscopic view of the lens holding component 2, the movable side metal component 5M, the leaf spring 6, the first magnetic component 10 and the metal connected body MA. Figure 3 The lower figure (located on the lower side of the hollow arrow) is an assembled stereogram of the lens holding component 2, the movable side metal component 5M, the leaf spring 6, the first magnetic component 10 and the metal connected body MA. Figure 3 In the figure below, the black solid arrow AR1 indicates that the position corresponding to the gate (the inlet for allowing synthetic resin to flow into the mold) when the lens holding component 2 is injection molded is located in the center of the rear side (X2 side) of the cylindrical portion 2C of the lens holding component 2, and the thick dotted line indicates that the weld line WL formed during injection molding is located in the center of the front side (X1 side) of the cylindrical portion 2C. The weld line WL is a linear trace left at the part where the molten resin flowing in two different paths in the mold merges during injection molding.

[0045] exist Figure 3 In the example shown in the above figure, the first movable side metal component 5M1 is fixed to the outer side surface (right mounting surface) of the side wall on the Y1 side of the first movable side seat part 2D1. Specifically, the first movable side metal component 5M1 is fixed to the first movable side seat part 2D1 by an adhesive in a state where two rectangular (Japanese: angled) protruding portions 2V formed on the first movable side seat part 2D1 and protruding outward (Y1 side) are engaged with two rectangular holes AH formed on the first movable side metal component 5M1. The adhesive is, for example, a light-curing adhesive. The light-curing adhesive is, for example, an ultraviolet curing adhesive or a visible light curing adhesive. Similarly, the second movable side metal component 5M2 is fixed to the outer side surface (rear mounting surface) of the side wall on the X2 side of the first movable side seat portion 2D1, the third movable side metal component 5M3 is fixed to the outer side surface (front mounting surface) of the side wall on the X1 side of the second movable side seat portion 2D2, and the fourth movable side metal component 5M4 is fixed to the outer side surface (left mounting surface) of the side wall on the Y2 side of the second movable side seat portion 2D2.

[0046] A portion of the metal connected body MA is buried in the lens holding component 2, and the remaining portion is provided in the lens holding component 2 in a manner exposed from the lens holding component 2. In the illustrated example, the metal connected body MA is partially buried in the lens holding component 2 by insert molding. In addition, the metal connected body MA has an embedded portion EM buried in the cylindrical portion 2C, and an exposed portion EP exposed on the inner surface of the cylindrical portion 2C, and is configured so that the exposed portion EP becomes a portion to be bonded and fixed to the lens body LS. In addition, the metal connected body MA has an upper exposed portion UE exposed on the upper surface of the movable side seat portion 2D, and an outer exposed portion SE exposed on the outer side surface of the movable side seat portion 2D, and the upper exposed portion UE is configured as a portion to be joined to the leaf spring 6, and is configured so that the outer exposed portion SE becomes a portion to be joined to the movable side metal component 5M.

[0047] Specifically, the metal connected body MA includes a first metal connected body MA1 and a second metal connected body MA2. Moreover, the first metal connected body MA1 has a first embedded portion EM1, a first exposed portion EP1, a first upper exposed portion UE1, a first outer exposed portion SE1, and a second outer exposed portion SE2, and the second metal connected body MA2 has a second embedded portion EM2, a second exposed portion EP2, a second upper exposed portion UE2, a third outer exposed portion SE3, and a fourth outer exposed portion SE4. Moreover, the lens body LS is bonded and fixed to the first exposed portion EP1 and the second exposed portion EP2, the first leaf spring 6A is welded to the first upper exposed portion UE1, and the second leaf spring 6B is welded to the second upper exposed portion UE2. In addition, the first movable side metal component 5M1 is welded to the first outer exposed portion SE1, the second movable side metal component 5M2 is welded to the second outer exposed portion SE2, the third movable side metal component 5M3 is welded to the third outer exposed portion SE3, and the fourth movable side metal component 5M4 is welded to the fourth outer exposed portion SE4. Therefore, it is possible to omit the adhesive for fixing the movable-side metal member 5M to the movable-side pedestal portion 2D.

[0048] In the example shown in the figure, the first metal connected body MA1 and the second metal connected body MA2 have the same shape and the same size. Specifically, the first metal connected body MA1 and the second metal connected body MA2 are configured to be twice rotationally symmetrical about the optical axis OA. Therefore, this configuration can reduce the number of components of the lens driving device 101.

[0049] Next, refer to Figure 4 The positional relationship between the components provided on the base member 18 and the base member 18 will be described. Figure 4 1 is a perspective view of the fixed side metal component 5F, the leaf spring 6, the base component 18 and the conductive component CM. Specifically, Figure 4The upper figure (the figure located on the upper side of the hollow arrow) is an exploded stereoscopic view of the fixed side metal component 5F, the leaf spring 6, the base component 18 and the conductive component CM. Figure 4 The lower figure (the figure located on the lower side of the hollow arrow) is an assembled stereoscopic view of the fixed-side metal component 5F, the leaf spring 6, the base component 18, and the conductive component CM.

[0050] exist Figure 4 In the example shown in the above figure, the first fixed side metal component 5F1 and the second fixed side metal component 5F2 are fixed to the outer side surface (right mounting surface) of the side wall of the first fixed side seat part 18D1 arranged along the second side part 18E2 of the base part 18. Specifically, the first fixed side metal component 5F1 and the second fixed side metal component 5F2 are fixed to the first fixed side seat part 18D1 by an adhesive in a state where two rectangular protrusions 18V protruding outward (Y1 side) formed on the first fixed side seat part 18D1 are engaged with two through parts RH formed on the first fixed side metal component 5F1 and the second fixed side metal component 5F2, respectively. The adhesive is, for example, a light-curing adhesive. The light-curing adhesive is, for example, an ultraviolet curing adhesive or a visible light curing adhesive. Similarly, the third fixed-side metal component 5F3 and the fourth fixed-side metal component 5F4 are fixed to the outer side surface (rear mounting surface) of the side wall on the X2 side of the second fixed-side seat portion 18D2 arranged along the third side portion 18E3 of the base member 18. In addition, the fifth fixed-side metal component 5F5 and the sixth fixed-side metal component 5F6 are fixed to the outer side surface (front mounting surface) of the side wall on the X1 side of the first fixed-side seat portion 18D1 arranged along the first side portion 18E1 of the base member 18. Furthermore, the seventh fixed-side metal component 5F7 and the eighth fixed-side metal component 5F8 are fixed to the outer side surface (left mounting surface) of the side wall on the Y2 side of the second fixed-side seat portion 18D2 arranged along the fourth side portion 18E4 of the base member 18.

[0051] like Figure 2 As shown, the shape memory alloy wire SA is configured to extend along the inner surface of the first peripheral wall portion 4A of the upper cover member 4U when current is supplied, and can support the movable side member MB so that it can move relative to the fixed side member FB. In this embodiment, the shape memory alloy wire SA includes the first wire SA1 to the eighth wire SA8, and is configured to support the lens holding member 2 of the movable side member MB so that it can move relative to the base member 18 of the fixed side member FB. Figure 2 As shown, one end of each of the first to eighth wires SA1 to SA8 is fixed to the movable-side metal member 5M by crimping or welding, and the other end is fixed to the fixed-side metal member 5F by crimping or welding.

[0052] Next, refer to Figure 5 The metal member 5 to which the shape memory alloy wire SA is attached will be described. Figure 5 : is a diagram showing a configuration example of the metal component 5 and the shape memory alloy wire SA. Specifically, Figure 5 The left figure is a diagram (right side view) showing the first wire SA1 respectively attached to the first movable side metal member 5M1 and the first fixed side metal member 5F1, and the second wire SA2 respectively attached to the first movable side metal member 5M1 and the second fixed side metal member 5F2 as viewed from the Y1 side. Figure 5 The right figure is a diagram (front view) of the first wire SA1 respectively installed on the first movable side metal component 5M1 and the first fixed side metal component 5F1, and the second wire SA2 respectively installed on the first movable side metal component 5M1 and the second fixed side metal component 5F2, as viewed from the X1 side. Figure 5 The left picture and Figure 5 The positional relationship of the components shown in the right figure of corresponds to the positional relationship when the lens driving device 101 is assembled and current is supplied to the first line SA1 and the second line SA2. Figure 5 The left picture and Figure 5 In the right figure of FIG, other parts are omitted for clarity. Figure 5 The left picture and Figure 5 The following description of the right figure is about the combination of the first line SA1 and the second line SA2, but is also applicable to the combination of the third line SA3 and the fourth line SA4, the combination of the fifth line SA5 and the sixth line SA6, and the combination of the seventh line SA7 and the eighth line SA8.

[0053] Specifically, one end of the first wire SA1 is fixed to the first movable side metal component 5M1 at the holding portion J1 on the lower side of the first movable side metal component 5M1, and the other end of the first wire SA1 is fixed to the first fixed side metal component 5F1 at the holding portion J2 of the first fixed side metal component 5F1. Similarly, one end of the second wire SA2 is fixed to the first movable side metal component 5M1 at the holding portion J3 on the upper side of the first movable side metal component 5M1, and the other end of the second wire SA2 is fixed to the second fixed side metal component 5F2 at the holding portion J4 of the second fixed side metal component 5F2.

[0054] The holding portion J1 is formed by bending a portion of the first movable side metal member 5M1. Specifically, a portion of the first movable side metal member 5M1 is bent while clamping one end of the first wire SA1 to form the holding portion J1. In addition, one end of the first wire SA1 is fixed to the holding portion J1 by welding. The same is true for the holding portions J2 to J4.

[0055] like Figure 5As shown in FIG. 1 , the first wire SA1 and the second wire SA2 are arranged in positions twisted with each other. That is, the first wire SA1 and the second wire SA2 are arranged so as not to contact each other (non-contact).

[0056] The base member 18 is configured to function as a wire support member that supports the other ends of the first to eighth wires SA1 to SA8. With this configuration, the movable member MB is supported by the first to eighth wires SA1 to SA8 so as to be movable in the direction parallel to the optical axis OA, that is, in the optical axis direction (Z-axis direction).

[0057] like Figure 4 As shown in the above figure, a fixed side seat portion 18D is formed on the upper surface of the base member 18 on the side of the object to be photographed (the surface on the Z1 side). The fixed side seat portion 18D includes a first fixed side seat portion 18D1 and a second fixed side seat portion 18D2. The first fixed side seat portion 18D1 and the second fixed side seat portion 18D2 are arranged to face each other in the radial direction with the optical axis OA interposed therebetween.

[0058] Figure 4 The conductive component CM as shown in the above figure is embedded in the base component 18 by insert molding. In the present embodiment, the conductive component CM is formed of a magnetic metal such as iron. Moreover, the conductive component CM is configured to have a first terminal portion TM1 to an eleventh terminal portion TM11 protruding from the lower surface (the surface on the Z2 side) of the base component 18 and extending downward (Z2 direction), a first connection portion ED1 to an eighth connection portion ED8 exposed on the side surface of the base component 18, and a ninth bonding surface portion CP9 and a tenth bonding surface portion CP10 exposed on the upper surface of the base component 18.

[0059] Specifically, the conductive component CM includes a first conductive component CM1 to an eleventh conductive component CM11. Furthermore, the first conductive component CM1 includes a first terminal portion TM1 and a first connecting portion ED1. The second conductive component CM2 includes a second terminal portion TM2 and a second connecting portion ED2. The third conductive component CM3 includes a third terminal portion TM3 and a third connecting portion ED3. The fourth conductive component CM4 includes a fourth terminal portion TM4 and a fourth connecting portion ED4. The fifth conductive component CM5 includes a fifth terminal portion TM5 and a fifth connecting portion ED5. The sixth conductive component CM6 includes a sixth terminal portion TM6 and a sixth connecting portion ED6. The seventh conductive component CM7 includes a seventh terminal portion TM7 and a seventh connecting portion ED7. The eighth conductive component CM8 includes an eighth terminal portion TM8 and an eighth connecting portion ED8. The ninth conductive component CM9 includes a ninth terminal portion TM9 and a ninth joint surface portion CP9. The tenth conductive component CM10 includes a tenth terminal portion TM10 and a tenth joint surface portion CP10. The eleventh conductive component CM11 includes an eleventh terminal portion TM11.

[0060] The first terminal portion TM1 to the fourth terminal portion TM4, the tenth terminal portion TM10, and the eleventh terminal portion TM11 are arranged along the third side portion 18E3 of the base member 18. The fifth terminal portion TM5 to the ninth terminal portion TM9 are arranged along the first side portion 18E1 of the base member 18. Thus, the first terminal portion TM1 to the eleventh terminal portion TM11 are arranged along the first side portion 18E1 or the third side portion 18E3 of the base member 18, and are not arranged along the second side portion 18E2 and the fourth side portion 18E4 of the base member 18.

[0061] Next, refer to Figure 6 as well as Figure 7 The positional relationship among the metal member 5 , the leaf spring 6 , the conductive member CM, the metal contact body MA, and the shape memory alloy wire SA will be described. Figure 6 It is a perspective view of the metal member 5 , the leaf spring 6 , the conductive member CM, the metal contact body MA, and the shape memory alloy wire SA. Figure 7 It is a plan view of the metal member 5, the leaf spring 6, and the metal connected body MA.

[0062] like Figure 7 As shown, the leaf spring 6 includes a first leaf spring 6A and a second leaf spring 6B. The first leaf spring 6A has a first fixed side seat portion 18D1 fixed to the base member 18 (see Figure 2 ) and the first portion 6A1 fixed to the second fixed side pedestal portion 18D2 of the base member 18 (see Figure 2 ) and the first movable side seat portion 2D1 fixed to the lens holding member 2 (see Figure 2 ), a third part 6A3 connecting the first part 6A1 and the third part 6A3, a fourth part 6A4 connecting the first part 6A1 and the third part 6A3, and a fifth part 6A5 connecting the second part 6A2 and the third part 6A3.

[0063] The first portion 6A1 is formed with two first through holes 6AH1, and the two first through holes 6AH1 are provided for two circular protrusions 18T (see FIG. 1 ) protruding upward and formed on the first fixed side seat portion 18D1. Figure 4 In the present embodiment, the fixing of the leaf spring 6 and the protrusion 18T is achieved by hot caulking or cold caulking the protrusion 18T. However, the fixing of the leaf spring 6 and the protrusion 18T may also be achieved by an adhesive.

[0064] The second portion 6A2 is formed with two second through holes 6AH2 and a tenth bonding surface portion CP10 (see FIG. 1 ) for bonding with the tenth conductive member CM10. Figure 4The two second through holes 6AH2 are provided with two circular protrusions 18T (see FIG. 1 ) protruding upward from the second fixed side seat portion 18D2. Figure 4 In the present embodiment, the plate spring 6 and the conductive member CM are joined by welding such as laser welding. However, the plate spring 6 and the conductive member CM may also be joined by solder or a conductive adhesive.

[0065] The third portion 6A3 is formed with two fourth through holes 6AH4, and the two fourth through holes 6AH4 are provided for two circular protrusions 2T (see FIG. 2 ) protruding upwardly formed on the first movable side pedestal 2D1. Figure 3 In the present embodiment, the fixing of the leaf spring 6 and the protrusion 2T is achieved by hot riveting or cold riveting the protrusion 2T. However, the fixing of the leaf spring 6 and the protrusion 2T may also be achieved by an adhesive. In addition, the third portion 6A3 is formed with a first upper exposed portion UE1 (see FIG. 1 ) for connecting with the first metal connected body MA1. Figure 3 In the present embodiment, the connection between the leaf spring 6 and the metal connected body MA is achieved by welding such as laser welding. However, the connection between the leaf spring 6 and the metal connected body MA may also be achieved by solder or conductive adhesive.

[0066] Similarly, the second leaf spring 6B has a first fixed side pedestal portion 18D1 fixed to the base member 18 (see Figure 2 ) and the first portion 6B1 fixed to the second fixed side pedestal portion 18D2 of the base member 18 (see Figure 2 ) and the second movable side seat portion 2D2 fixed to the lens holding member 2 (see Figure 2 ), a third part 6B3 connecting the first part 6B1 and the third part 6B3, a fourth part 6B4 connecting the first part 6B1 and the third part 6B3, and a fifth part 6B5 connecting the second part 6B2 and the third part 6B3.

[0067] The first portion 6B1 is formed with two first through holes 6BH1 and a ninth bonding surface portion CP9 (see Figure 4 The two first through holes 6BH are provided with two circular protrusions 18T (see FIG. 1 ) protruding upward from the first fixed side seat portion 18D1. Figure 4 ) in the figure below.

[0068] The second portion 6B2 is formed with two third through holes 6BH3, and the two third through holes 6BH3 are provided for two circular protrusions 18T (see FIG. 1 ) protruding upwardly formed on the second fixed side pedestal 18D2. Figure 4 ) in the figure below.

[0069] The third portion 6B3 is formed with two fourth through holes 6BH4, and the two fourth through holes 6BH4 are provided for two circular protrusions 2T (see FIG. 2 ) protruding upwardly formed on the second movable side pedestal 2D2. Figure 3 In addition, the third portion 6B3 is provided with a second upper exposed portion UE2 (see FIG. 1 ) for contact with the second metal connected body MA2. Figure 3 (above) The fifth through hole 6BH5 connected.

[0070] In addition, the fourth portion 6A4 and the fifth portion 6A5 of the first leaf spring 6A and the fourth portion 6B4 and the fifth portion 6B5 of the second leaf spring 6B are elastically deformable arm portions having a plurality of curved portions. Therefore, the lens holding member 2 can move relative to the base member 18 (fixed side member FB) not only in a direction parallel to the optical axis OA but also in a direction intersecting the optical axis OA.

[0071] like Figure 7 As shown, the first leaf spring 6A and the second leaf spring 6B have the same shape and the same size. Specifically, the first leaf spring 6A and the second leaf spring 6B are configured to be twice rotationally symmetrical about the optical axis OA. Therefore, this configuration can reduce the number of components of the lens driving device 101. In addition, the first leaf spring 6A and the second leaf spring 6B can support the lens holding component 2 in the air with good balance. In addition, the leaf spring 6 will not have an adverse effect on the weight balance of the movable side component MB supported by the eight shape memory alloy wires SA (the first wire SA1 to the eighth wire SA8).

[0072] like Figure 4 As shown, the first connection portion ED1 of the first conductive component CM1 is joined to the first fixed-side metal component 5F1 by welding. That is, the first connection portion ED1 and the first fixed-side metal component 5F1 are joined in a state where the surfaces of each other are substantially parallel. Similarly, the second connection portion ED2 of the second conductive component CM2 is joined to the second fixed-side metal component 5F2 by welding, the third connection portion ED3 of the third conductive component CM3 is joined to the third fixed-side metal component 5F3 by welding, and the fourth connection portion ED4 of the fourth conductive component CM4 is joined to the fourth fixed-side metal component 5F4 by welding. In addition, the fifth connection portion ED5 of the fifth conductive component CM5 is joined to the fifth fixed-side metal component 5F5 by welding, the sixth connection portion ED6 of the sixth conductive component CM6 is joined to the sixth fixed-side metal component 5F6 by welding, the seventh connection portion ED7 of the seventh conductive component CM7 is joined to the seventh fixed-side metal component 5F7 by welding, and the eighth connection portion ED8 of the eighth conductive component CM8 is joined to the eighth fixed-side metal component 5F8 by welding.

[0073] like Figure 3 As shown, the first movable side metal component 5M1 is joined to the outer exposed portion SE (first outer exposed portion SE1) of the first metal connected body MA1 by welding. That is, the first movable side metal component 5M1 and the outer exposed portion SE (first outer exposed portion SE1) are joined in a state where the surfaces of each other are substantially parallel. Similarly, the second movable side metal component 5M2 is joined to the outer exposed portion SE (second outer exposed portion SE2) of the first metal connected body MA1 by welding, the third movable side metal component 5M3 is joined to the outer exposed portion SE (third outer exposed portion SE3) of the second metal connected body MA2 by welding, and the fourth movable side metal component 5M4 is joined to the outer exposed portion SE (fourth outer exposed portion SE4) of the second metal connected body MA2 by welding.

[0074] In addition, if Figure 7 As shown, the first fixed-side metal component 5F1 is arranged separately from the first portion 6A1 of the first leaf spring 6A and does not contact the first portion 6A1 of the first leaf spring 6A. Similarly, the third fixed-side metal component 5F3 does not contact the second portion 6A2 of the first leaf spring 6A, the fifth fixed-side metal component 5F5 does not contact the first portion 6B1 of the second leaf spring 6B, and the seventh fixed-side metal component 5F7 does not contact the second portion 6B2 of the second leaf spring 6B.

[0075] like Figure 6 As shown, the ninth bonding surface CP9 (refer to Figure 4 The ninth joint surface CP9 is joined to the first portion 6B1 of the second leaf spring 6B in parallel with the second through hole 6BH2 formed in the first portion 6B1 of the second leaf spring 6B by laser welding or the like. That is, the ninth joint surface CP9 is joined to the first portion 6B1 in a state where the surfaces of the ninth joint surface CP9 are substantially parallel to each other. Figure 6 As shown, the tenth bonding surface portion CP10 (see Figure 4 (above) At the third through hole 6AH3 formed in the second portion 6A2 of the first leaf spring 6A, it is joined in parallel to the second portion 6A2 of the first leaf spring 6A by welding such as laser welding.

[0076] like Figure 6As shown, if the first terminal portion TM1 of the first conductive component CM1 is connected to a high potential and the tenth terminal portion TM10 of the tenth conductive component CM10 is connected to a low potential, the current flows from the first terminal portion TM1 through the first conductive component CM1 to the first fixed-side metal component 5F1. Then, the current flows through the first fixed-side metal component 5F1, through the first wire SA1, and further through the first movable-side metal component 5M1. Then, the current flows through the first metal connected body MA1 (the first outer exposed portion SE1 and the first upper exposed portion UE1), the third portion 6A3, the fifth portion 6A5, and the second portion 6A2 of the first leaf spring 6A, and flows through the tenth conductive component CM10 to the tenth terminal portion TM10.

[0077] If the second terminal portion TM2 of the second conductive component CM2 is connected to a high potential and the tenth terminal portion TM10 of the tenth conductive component CM10 is connected to a low potential, the current flows from the second terminal portion TM2 into the second fixed-side metal component 5F2 through the second conductive component CM2. Then, the current flows through the second fixed-side metal component 5F2, through the second wire SA2, and further through the first movable-side metal component 5M1. Then, the current flows through the first metal connected body MA1 (the first outer exposed portion SE1 and the first upper exposed portion UE1), the third portion 6A3, the fifth portion 6A5, and the second portion 6A2 of the first leaf spring 6A, and flows through the tenth conductive component CM10 into the tenth terminal portion TM10.

[0078] In either case where the first terminal portion TM1 of the first conductive member CM1 is connected to a high potential or the second terminal portion TM2 of the second conductive member CM2 is connected to a high potential, the path of the current flowing from the first movable-side metal member 5M1 to the tenth terminal portion TM10 is the same.

[0079] The control device located outside the lens driving device 101 as described above can control the contraction of each of the first line SA1 to the eighth line SA8 by controlling the voltage applied to each terminal portion of the first conductive member CM1 to the tenth conductive member CM10. In addition, the control device can also be configured in the lens driving device 101. In addition, the control device can also be a component of the lens driving device 101.

[0080] The control device may, for example, utilize the driving force in the direction parallel to the optical axis OA generated by the contraction of the shape memory alloy wire SA as the driving portion DM to move the lens holding component 2 in the direction parallel to the optical axis OA on the Z1 side (the side of the object to be photographed) of the imaging element. Furthermore, the control device may also realize an automatic focus adjustment function as one of the lens adjustment functions by moving the lens holding component 2 as described above. Specifically, the control device may be capable of moving the lens holding component 2 in a direction away from the imaging element for macro photography, and may be capable of moving the lens holding component 2 in a direction close to the imaging element for infinity photography.

[0081] Alternatively, the control device may control the current flowing through the plurality of shape memory alloy wires SA to move the lens holding member 2 in a direction intersecting the optical axis OA. In this way, the control device may also realize a shake correction function.

[0082] like Figure 3 As shown in the above figure, a receiving portion HR opening upward (Z1 direction) is formed in the protruding portion 2S of the lens holding component 2. Furthermore, the first magnetic component 10 is received in the receiving portion HR and fixed by an adhesive. Specifically, a first receiving portion HR1 opening upward is formed in the first protruding portion 2S1, and a second receiving portion HR2 opening upward is formed in the second protruding portion 2S2. Furthermore, a first magnet 10A is received in the first receiving portion HR1, and a second magnet 10B is received in the second receiving portion HR2.

[0083] The first magnetic member 10 is used to be connected to the second magnetic member MG (see Figure 8 ) between the first magnetic component 10 and the second magnetic component 10. In the example shown in the figure, the first magnetic component 10 includes a first magnet 10A and a second magnet 10B. The first magnet 10A and the second magnet 10B are both two-pole permanent magnets. However, the first magnetic component 10 does not have to be a magnet as long as it can generate a magnetic attraction between it and the second magnetic component MG. In this case, the first magnetic component 10 may also be a magnetic metal or a magnetic resin material, for example. In addition, the first magnetic component 10 may be embedded in the lens holding component 2 by insert molding, etc., or may be adhered to the lens holding component 2.

[0084] Next, refer to Figure 8 , the positional relationship between the first magnetic member 10 and the second magnetic member MG when no current is supplied to the shape memory alloy wire SA will be described. Figure 8 The figure shows the positional relationship between the first magnetic member 10 attached to the lens holding member 2 and the second magnetic member MG included in the conductive member CM embedded in the base member 18 when the shape memory alloy wire SA is not energized. Specifically, Figure 8The above figure is a three-dimensional diagram of the first magnetic component 10 and the conductive component CM. Figure 8 The figure below is a top view of the conductive component CM. Figure 8 The above picture and Figure 8 In the following figure, for the sake of clarity, the illustration of components other than the first magnetic component 10 and the conductive component CM is omitted. Figure 8 The above picture and Figure 8 In the lower figure of FIG. 1 , a dot pattern is added to the second magnetic member MG which is a part of the conductive member CM embedded in the base member 18 for the sake of clarity. Figure 8 In the lower figure of FIG. 1 , the outline of the first magnetic component 10 is shown by a dotted line for clarity.

[0085] The second magnetic member MG is a member for generating a magnetic attraction force between the first magnetic member 10 attached to the lens holding member 2. Figure 8 In the example shown, the second magnetic component MG includes a first metal plate MG1 and a second metal plate MG2. The first metal plate MG1 and the second metal plate MG2 are both formed of magnetic metal. Specifically, the first metal plate MG1 is formed as a part of the ninth conductive component CM9, and the second metal plate MG2 is formed as a part of the tenth conductive component CM10. However, the second magnetic component MG does not need to be a magnetic metal as long as it can generate a magnetic attraction force between it and the first magnetic component 10. In this case, the second magnetic component MG may also be a magnet. In addition, the second magnetic component MG may also be configured as a component independent of the conductive component CM. In this case, the conductive component CM is preferably formed of a non-magnetic material such as a non-magnetic metal. In addition, the second magnetic component MG does not need to be buried in the base component 18, but may be adhered to the base component 18.

[0086] like Figure 8 The above picture and Figure 8 As shown in the figure below, when the shape memory alloy wire SA is not energized, the first magnetic component 10 is arranged in a receiving portion HR formed by the protruding portion 2S of the lens holding component 2 in a state where it is located directly above the second magnetic component MG while being away from the second magnetic component MG at a predetermined distance.

[0087] Moreover, if Figure 8As shown in the figure below, the first magnetic component 10 and the second magnetic component MG are configured such that the area of ​​the upper opposing surface CSU of the first magnetic component 10 opposing the second magnetic component MG is approximately equal to the area of ​​the lower opposing surface CSL of the second magnetic component MG opposing the first magnetic component 10. This is because when the area of ​​the upper opposing surface CSU is significantly different from the area of ​​the lower opposing surface CSL, due to the magnetic attraction force generated between the first magnetic component 10 and the second magnetic component MG, the positional relationship between the first magnetic component 10 and the second magnetic component MG when the first magnetic component 10 is attracted by the second magnetic component MG and is stationary is deviated.

[0088] Specifically, if Figure 8 As shown in the following figure, the first magnet 10A and the first metal plate MG1 are configured such that the area of ​​the upper opposing surface CSU1 of the first magnet 10A opposed to the first metal plate MG1 is substantially equal to the area of ​​the lower opposing surface CSL1 of the first metal plate MG1 opposed to the first magnet 10A. In addition, the second magnet 10B and the second metal plate MG2 are configured such that the area of ​​the upper opposing surface CSU2 of the second magnet 10B opposed to the second metal plate MG2 is substantially equal to the area of ​​the lower opposing surface CSL2 of the second metal plate MG2 opposed to the second magnet 10B.

[0089] In addition, Figure 8 In the example shown, the first magnetic component 10 has a substantially rectangular parallelepiped shape, but may also have other shapes such as a cylinder or a hexagonal prism. Figure 8 In the example shown, the upper opposing surface CSU has a rectangular outer shape, but may have another outer shape such as a circular or hexagonal shape. In this case, the lower opposing surface CSL is preferably configured to have the same outer shape as the upper opposing surface CSU.

[0090] Next, refer to Fig. 9 The lens holding member 2 will be described in detail. Fig. 9 2 is a diagram showing an example of the structure of a lens holding member 2 in which a metal connected body MA is embedded. Specifically, Fig. 9 The upper figure is a perspective view of the lens holding component 2 in which the metal connected body MA is buried. Fig. 9 The figure below is a cross-sectional view of the lens holding component 2 in which the metal connected body MA is embedded, showing Fig. 9 The cross sections of the metal contact body MA and the lens holding member 2 in the virtual plane parallel to the XZ plane and including the dotted line L1 in the above figure. Fig. 9 In the figure above, the black solid arrow AR2 indicates the position corresponding to the gate when the lens holding component 2 is injection molded, and the thick dotted line indicates the weld line WL formed during injection molding. Fig. 9 In the figure, a dot pattern is added to the metal adherend MA.

[0091] In the example shown in the figure, the second metal adherend MA2 is arranged at the portion where the weld line WL is formed in the lens holding member 2. That is, the second metal adherend MA2 is arranged to intersect the converging interface formed when molten resins flowing in different paths in the mold merge during injection molding in a plan view.

[0092] With this configuration, the second metal adherend MA2 can reinforce the portion of the lens holding member 2 where the weld line WL is formed, and can suppress the lens holding member 2 from being broken at the portion where the weld line WL is formed.

[0093] In addition, if Figure 3 As shown in the above figure, the exposed portion EP of the metal connected body MA is configured to have a substantially semicircular arc shape when viewed from above. This configuration brings about the effect that the metal connected body MA is easier to manufacture compared to the case where the exposed portion EP has a cylindrical shape. This is because the metal connected body MA can be formed by simply bending a metal plate having a predetermined shape.

[0094] In addition, if Fig. 9 As shown in the above figure, in the lens holding component 2, the position corresponding to the gate (the position indicated by the black solid arrow AR2) and the position where the weld line WL is formed are opposite to each other across the optical axis OA. Moreover, the first metal adherend MA1 is arranged at the portion of the lens holding component 2 corresponding to the gate. That is, the metal adherend MA is arranged at both the position corresponding to the gate and the position corresponding to the weld line WL in the lens holding component 2. This structure can strengthen not only the portion of the weld line WL, but also the lens holding component 2 in the portion corresponding to the gate. Therefore, this structure can suppress the lens holding component 2 from breaking in the portion corresponding to the gate.

[0095] Next, refer to Figure 10 to Figure 12 A lens driving device 101A as another configuration example of the lens driving device 101 will be described. Fig.10 is a perspective view of a camera module CD including a lens driving device 101A, corresponding to Figure 1 . Fig.11 is an exploded perspective view of the lens driving device 101A, corresponding to Figure 2 . Fig.12 2 is a perspective view of the lens holding member 2, the coil 8 wound around the outer peripheral surface of the cylindrical portion 2C of the lens holding member 2, and the metal connected body MA embedded in the lens holding member 2. Fig.12 In FIG. 1 , a position corresponding to a gate when the lens holding member 2 is injection-molded is indicated by a black solid arrow AR3 , and a weld line WL formed during injection molding is indicated by a thick dotted line.

[0096] The lens driving device 101A is mainly different from the lens driving device 101 in which the driving portion DM is composed of a shape memory alloy wire SA in that the driving portion DM is composed of a magnet 7 and a coil 8 .

[0097] Specifically, the lens driving device 101A includes a spacer member 1, a lens holding member 2, a cover member 4, a leaf spring 6, a magnet 7, a coil 8, a base member 18, a conductive member CM, and a metal contact body MA.

[0098] The spacer component 1 is configured to prevent the lens holding component 2 formed of synthetic resin from colliding with the cover component 4 formed of metal when the lens holding component 2 moves in the Z1 direction. That is, the spacer component 1 is formed of synthetic resin and is configured to form a space between the lens holding component 2 and the top plate portion 4B of the cover component 4. Moreover, the spacer component 1 is fixed to the cover component 4 by an adhesive. Specifically, the spacer component 1 and the lens holding component 2 constitute a limiter that limits the excessive movement of the lens holding component 2 in the Z1 direction (upward). In the present embodiment, the lens holding component 2 is configured to contact the spacer component 1 when it moves a predetermined distance in the Z1 direction. Through this configuration, the spacer component 1 can prevent the lens holding component 2 formed of synthetic resin from contacting the cover component 4 formed of metal, and can prevent the wear of the lens holding component 2 caused by such contact. However, if a space can be formed between the lens holding component 2 and the top plate portion 4B of the cover component 4 by other structures, the spacer component 1 can also be omitted.

[0099] The leaf spring 6 includes an upper leaf spring 6U and a lower leaf spring 6D. The lower leaf spring 6D includes a first lower leaf spring 6DA and a second lower leaf spring 6DB. The lower leaf spring 6D functions as a conductive path for supplying current to the coil 8. The upper leaf spring 6U has two outer fixing portions fixed between the lower surface of the spacer component 1 and the upper surface of the magnet 7, a roughly annular inner fixing portion fixed to the upper surface of the cylindrical portion 2C of the lens holding component 2, and four elastic arm portions connecting the two outer fixing portions to the inner fixing portions, respectively. The first lower leaf spring 6DA and the second lower leaf spring 6DB respectively have two outer fixing portions fixed to the upper surface of the base component 18, a roughly quarter-circular inner fixing portion fixed to the lower surface of the cylindrical portion 2C of the lens holding component 2, and two elastic arm portions connecting the two outer fixing portions to the inner fixing portions, respectively.

[0100] The leaf spring 6 is joined to the lens holding member 2 and the base member 18 by caulking or adhesive. With this structure, the leaf spring 6 can support the lens holding member 2 in a state where the lens holding member 2 can move relative to the base member 18 in the optical axis direction.

[0101] The magnet 7 is a member constituting the driving unit DM. In the example shown in the figure, the magnet 7 is a permanent magnet magnetized in two poles, and includes a left magnet 7L and a right magnet 7R.

[0102] The coil 8 is a component constituting the driving unit DM. In the example shown in the figure, the coil 8 is wound around the outer peripheral surface of the cylindrical portion 2C of the lens holding member 2. One end of the coil 8 is electrically connected to the conductor pattern of the substrate SB via the first lower leaf spring 6DA and the conductive member CM, and the other end is electrically connected to the conductor pattern of the substrate SB via the second lower leaf spring 6DB and the conductive member CM.

[0103] A portion of the metal connected body MA is embedded in the lens holding member 2, and the remaining portion is provided in the lens holding member 2 in a manner exposed from the lens holding member 2. In the example shown in the figure, the metal connected body MA is partially embedded in the lens holding member 2 by insert molding. Fig.12 As shown, the metal adhered body MA includes an embedded portion EM embedded in the cylindrical portion 2C and an exposed portion EP exposed on the inner surface of the cylindrical portion 2C, and the exposed portion EP is configured to be a portion bonded and fixed to the lens body LS.

[0104] Specifically, if Fig.12 As shown, the metal connected body MA includes the first metal connected body MA1 to the fourth metal connected body MA4. Moreover, the first metal connected body MA1 has a first buried portion EM1 and a first exposed portion EP1, the second metal connected body MA2 has a second buried portion EM2 and a second exposed portion EP2, the third metal connected body MA3 has a third buried portion EM3 and a third exposed portion EP3, and the fourth metal connected body MA4 has a fourth buried portion EM4 and a fourth exposed portion EP4. Moreover, the lens body LS is bonded and fixed to the first exposed portion EP1, the second exposed portion EP2, the third exposed portion EP3, and the fourth exposed portion EP4.

[0105] In addition, the first metal connected body MA1 and the third metal connected body MA3 have the same shape and the same size. Specifically, the first metal connected body MA1 and the third metal connected body MA3 are arc-shaped parts with a center angle of about 60 degrees when viewed from above, and are configured to be point-symmetrical relative to the optical axis OA when viewed from above. The second metal connected body MA2 and the fourth metal connected body MA4 have the same shape and the same size. Specifically, the second metal connected body MA2 and the fourth metal connected body MA4 are arc-shaped parts with a center angle of about 120 degrees when viewed from above, and are configured to be point-symmetrical relative to the optical axis OA when viewed from above. Therefore, this structure can reduce the number of components of the lens driving device 101. In addition, the first metal connected body MA1 to the fourth metal connected body MA4 can also have the same shape and the same size. For example, the first metal connected body MA1 to the fourth metal connected body MA4 can also be configured as arc-shaped parts with a center angle of about 90 degrees when viewed from above.

[0106] exist Fig.12 In the example shown, the second metal adherend MA2 is arranged at the portion where the weld line WL is formed in the lens holding member 2. That is, the second metal adherend MA2 is arranged to intersect the confluence interface formed when molten resins flowing in different paths in the mold merge during injection molding in a plan view.

[0107] With this configuration, the second metal adherend MA2 can reinforce the portion of the lens holding member 2 where the weld line WL is formed, and can suppress the lens holding member 2 from being broken at the portion where the weld line WL is formed.

[0108] In addition, if Fig.12 As shown, the exposed portion EP of the metal connected body MA is configured to have a substantially arc shape when viewed from above. This configuration brings about the effect that the metal connected body MA is easier to manufacture compared to the case where the exposed portion EP has a cylindrical shape. This is because the metal connected body MA can be formed by simply bending a metal plate having a predetermined shape.

[0109] Next, refer to Fig.13 Four other configuration examples of the metal connected body MA embedded in the cylindrical portion 2C of the lens holding member 2 of the lens driving device 101A will be described. Fig.13 The four figures included in the figure are all three-dimensional views of a part of the lens driving device 101A, which is equivalent to observing the lens driving device 101A from the oblique upper side of the Y1 side. Fig.10 FIG. 1 is a diagram of a range R1 surrounded by a dotted line.

[0110] exist Fig.13 In the figure at the top, the metal connected body MA is composed of a roughly cylindrical member, which is different from the metal connected body MA composed of four partially cylindrical members. Fig.12The metal bodies MA shown are different.

[0111] This composition and Fig.12 Compared with the metal adhered body MA shown in FIG. 1 , the bonding strength of the adhesive between the lens holding member 2 and the lens body LS is increased. This is because the surface area of ​​the exposed portion EP is large.

[0112] exist Fig.13 In the second figure from the top, the metal connected body MA and the exposed portion EP having a surface (inner peripheral surface) without unevenness Fig.13 The difference between the metal connected body MA shown in the top figure is that a plurality of recesses RC having a substantially rectangular opening when viewed from the side are formed on the surface (inner circumference) of the exposed portion EP. Specifically, the plurality of recesses RC are recesses that are recessed in a direction away from the lens body LS (optical axis OA), have the same shape and the same size, and are arranged in a manner that is equally spaced along the circumferential direction.

[0113] This composition and Fig.13 Compared with the metal adherend MA shown in the figure at the top, the bonding strength of the adhesive between the lens holding component 2 and the lens body LS is increased. This is because the surface area of ​​the exposed portion EP is large. In addition, this is because the adhesive enters the interior of the multiple recesses RC and solidifies.

[0114] exist Fig.13 In the third figure from the top, the metal connected body MA has a plurality of grooves GV extending in the circumferential direction as recessed portions RC formed on the surface (inner circumferential surface) of the exposed portion EP, which is different from the exposed portion EP having a surface (inner circumferential surface) without projections and depressions. Fig.13 Specifically, the plurality of grooves GV have the same shape and the same size (width), and are arranged at equal intervals in the optical axis direction.

[0115] This composition and Fig.13 Compared with the metal adherend MA shown in the figure at the top, the bonding strength of the adhesive between the lens holding component 2 and the lens body LS is increased. This is because the surface area of ​​the exposed portion EP is large. In addition, this is because the adhesive enters the interior of the multiple grooves GV and solidifies.

[0116] Located in Fig.13 In the bottom figure, the metal connected body MA and the exposed portion EP having a surface (inner peripheral surface) without unevenness Fig.13The difference from the metal adherend MA shown in the uppermost figure lies in that there is a pattern PT formed by a plurality of rectangular ring-shaped recesses and a plurality of linear recesses extending in the circumferential direction alternately arranged in the circumferential direction and the plurality of rectangular ring-shaped recesses being connected to the plurality of linear recesses, as a concave portion RC formed on the surface (inner circumferential surface) of the exposed portion EP. Specifically, the pattern PT is configured such that the plurality of rectangular ring-shaped recesses each have the same shape and the same size, and the plurality of linear recesses each have the same shape and the same size. However, the pattern PT may also be any other pattern such as a dot pattern or stripes.

[0117] This configuration brings Fig.13 a higher adhesive strength of the adhesive between the lens holding member 2 and the lens body LS compared to the metal adherend MA shown in the uppermost figure. This is because the surface area of the exposed portion EP is larger. Additionally, this is because the adhesive enters the interiors of the plurality of rectangular ring-shaped recesses and the plurality of linear recesses respectively and cures.

[0118] Furthermore, processing for forming unevenness such as knurling or roll texturing may be performed on the surface (inner circumferential surface) of the exposed portion EP.

[0119] Moreover, in Fig.13 the second figure from the top, the third figure from the top, and the lowermost figure, the metal adherend MA is constituted by a single substantially cylindrical member, but may also be constituted by a combination of two or more partially cylindrical members.

[0120] As described above, as Figure 2 , Fig.11 shown, the lens driving devices 101, 101A of the embodiments of the present application include a fixed-side member FB, a lens holding member 2 having a cylindrical portion 2C capable of fixing the lens body LS with an adhesive, and a driving portion DM that moves the lens holding member 2 relative to the fixed-side member FB. Moreover, the lens holding member 2 is formed of a synthetic resin in which the metal adherend MA is embedded. As Figure 3 , Fig.12 shown, the metal adherend MA has an embedded portion EM embedded in the cylindrical portion 2C and an exposed portion EP exposed on the inner surface of the cylindrical portion 2C, and is configured such that the exposed portion EP becomes the portion for adhesively fixing to the lens body LS. Moreover, the metal adherend MA is disposed at a position corresponding to the weld line WL formed during the molding of the lens holding member 2.

[0121] This structure brings about the effect of improving the bonding strength between the lens body LS and the lens holding component 2, compared with the case where the inner surface of the cylindrical portion 2C of the lens holding component 2 that contacts the lens body LS is formed of a synthetic resin. This is because the metal adherend MA is exposed on the inner surface of the cylindrical portion 2C of the lens holding component 2. In other words, the bonding strength between the lens body LS and the metal (metal adherend MA) is greater than the bonding strength between the lens body LS and the synthetic resin material (lens holding component 2). In addition, this structure brings about the effect of suppressing the occurrence of an undesirable situation in which the lens holding component 2 breaks from the weld line WL when a strong impact such as being dropped is applied. This is because the metal adherend MA is arranged at the position corresponding to the weld line WL of the lens holding component 2.

[0122] In addition, the metal adherend MA disposed at a position corresponding to the weld line WL is preferably disposed so as to be exposed on the surface of the cylindrical portion 2C. Fig. 9 In the example shown, the second metal adherend MA2 disposed at the position corresponding to the weld line WL is as shown in FIG. Fig. 9 As shown in the figure below, the second exposed portion EP2 is configured to be exposed on the inner surface of the cylindrical portion 2C.

[0123] Compared with the structure in which the metal connected body MA arranged at the position corresponding to the weld line WL is not exposed on the surface of the cylindrical part 2C, this structure brings about the effect of improving the close contact of the two parts formed of synthetic resin arranged across the weld line WL. This is because in the structure in which the metal connected body MA arranged at the position corresponding to the weld line WL is not exposed on the surface of the cylindrical part 2C, that is, in the structure in which the metal connected body MA is completely buried in the cylindrical part 2C, the thickness of each of the above two parts (the width in the radial direction of the circle centered on the optical axis OA) is divided into a part located radially inside the metal connected body MA and a part located radially outside, and becomes smaller. In other words, this is because in the structure in which the metal connected body MA arranged at the position corresponding to the weld line WL is exposed on the inner surface of the cylindrical part 2C, the above two parts are only located radially outside the metal connected body MA and will not be disconnected by the metal connected body MA, so the thickness of each of the two parts can be increased.

[0124] In addition, if Figure 3 As shown, the metal connected body MA may also include a first metal connected body MA1 and a second metal connected body MA2 that are separated from each other and arranged at different positions in the circumferential direction of the cylindrical portion 2C. In this case, the first metal connected body MA1 and the second metal connected body MA2 may also have an embedded portion EM and an exposed portion EP, respectively. Moreover, the first metal connected body MA1 or the second metal connected body MA2 may also be arranged at the position corresponding to the weld line WL. Figure 3In the example shown, the first metal adhered body MA1 has a first embedded portion EM1 and a first exposed portion EP1, and the second metal adhered body MA2 has a second embedded portion EM2 and a second exposed portion EP2. The second metal adhered body MA2 is disposed at a position corresponding to the weld line WL.

[0125] Compared with the case where the metal adherend MA is formed into a ring (cylindrical shape) by one metal plate, this structure can improve the productivity of the metal adherend MA, thereby bringing about the effect of improving the productivity of the lens driving device 101. This is because in the case where the metal adherend MA is formed into a ring (cylindrical shape) by one metal plate, a stretching process is required, while in the case where the metal adherend MA is composed of two or more metal plates, the metal adherend MA having a desired shape can be obtained only by bending the metal plates. That is, this is because in the case where the metal adherend MA is composed of two or more metal plates, the number of stretching processes can be reduced, or the metal adherend MA can be manufactured without using a stretching process. In addition, in the case where the metal adherend MA is composed of two or more metal plates, for example Fig. 9 As shown, one of the plurality of metal adherends MA (second metal adherend MA2) is also arranged at a position corresponding to the weld line WL. Therefore, even when a strong impact such as being dropped is applied, the lens holding member 2 is unlikely to be broken at the weld line WL.

[0126] In addition, the exposed portion EP of each of the first metal adhered body MA1 and the second metal adhered body MA2 may extend along the circumferential direction of the cylindrical portion 2C. Figure 3 As shown, the first exposed portion EP1 of the first metal adhered body MA1 and the second exposed portion EP2 of the second metal adhered body MA2 may each be formed in an arc shape with a central angle of approximately 180 degrees in a plan view.

[0127] This configuration has the effect of improving the bonding strength between the lens body LS and the metal adherend MA because the longer the exposed portion EP extends in the circumferential direction, the larger the contact area between the adhesive disposed between the lens body LS and the metal adherend MA and the metal adherend MA.

[0128] In addition, if Fig.13 As shown in the second, third and fourth figures from the top, the exposed portion EP may also have a plurality of recesses RC extending in the circumferential direction of the cylindrical portion 2C and capable of accommodating an adhesive. In this case, the recess RC may also be a recess recessed in a direction away from the lens body LS (optical axis OA).

[0129] This composition is similar to Fig.13Compared with the structure without the recess RC as shown in the top figure, the bonding strength between the lens body LS and the metal adherend MA can be improved. This is because the contact area between the adhesive arranged between the lens body LS and the metal adherend MA and the metal adherend MA increases by the amount of the side wall of the recess RC. In addition, this is because the cured adhesive engages with the recess RC having the undercut shape and becomes difficult to peel off. In addition, the undercut shape means a shape that cannot be demolded in the opening and closing direction of the mold when the injection molded product is taken out from the mold.

[0130] In addition, if Fig.13 As shown in the third figure from the top, the plurality of recessed portions RC may be formed by a plurality of groove portions GV extending in the circumferential direction of the cylindrical portion 2C.

[0131] This composition is similar to Fig.13 Compared with the structure without the concave portion RC as shown in the top figure, the bonding strength between the lens body LS and the metal adherend MA can be improved. This is because the contact area between the adhesive arranged between the lens body LS and the metal adherend MA and the metal adherend MA is increased by the amount of the side wall of the groove portion GV. In addition, this is because the cured adhesive meshes with the groove portion GV having an undercut shape and becomes difficult to peel off.

[0132] In addition, if Figure 2 As shown, the driving unit DM may also be composed of a shape memory alloy wire SA provided between the movable side member MB including the lens holding member 2 and the fixed side member FB. Figure 5 As shown, one end of the shape memory alloy wire SA may be fixed to the movable side metal component 5M provided in the movable side component MB (lens holding component 2), and the other end of the shape memory alloy wire SA may be fixed to the fixed side metal component 5F provided in the fixed side component FB (base component 18). Figure 3 As shown, the metal contact body MA may further include an outer exposed portion SE exposed on the outer surface of the lens holding member 2. Furthermore, the movable-side metal member 5M may be fixed to the outer exposed portion SE.

[0133] This configuration brings about an effect that the movable-side metal member 5M for fixing one end of the shape-memory alloy wire SA can be attached to the lens holding member 2 by utilizing the metal adhered body MA embedded in the lens holding member 2 .

[0134] In addition, the movable-side metal member 5M and the outer exposed portion SE may be welded.

[0135] This configuration brings about an effect that the movable-side metal member 5M can be attached to the lens holding member 2 with high productivity, compared with the case where the movable-side metal member 5M and the outer exposed portion SE are bonded with an adhesive.

[0136] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the above embodiments. Various modifications and substitutions can be applied to the above embodiments without departing from the scope of the present invention. In addition, the various features described with reference to the above embodiments can be appropriately combined as long as there is no technical contradiction.

[0137] Description of Reference Numerals

[0138] 1…spacer member, 2…lens holding member, 2C…cylindrical portion, 2D…movable side seat portion, 2D1…first movable side seat portion, 2D2…second movable side seat portion, 2S…protruding portion, 2S1…first protruding portion, 2S2…second protruding portion, 2T…protruding portion, 2V…protruding portion, 4…cover member, 4A…first peripheral wall portion, 4A1…first side plate portion, 4A2…second side plate portion, 4A3…third side plate portion, 4A4…fourth side plate portion, 4B…top plate portion, 4C…second peripheral wall portion, 4C1…first side plate portion, 4C2…second side plate portion, 4C3…third side plate portion, 4C4…fourth side plate portion, 4D…bottom plate portion, 4K…opening, 4L…lower cover member, 4M…opening, 4S…Storage portion, 4U…Upper cover component, 5…Metal component, 5F…Fixed side metal component, 5F1…First fixed side metal component, 5F2…Second fixed side metal component, 5F3…Third fixed side metal component, 5F4…Fourth fixed side metal component, 5F5…Fifth fixed side metal component, 5F6…Sixth fixed side metal component, 5F7…Seventh fixed side metal component, 5F8…Eighth fixed side metal component, 5M…Movable side metal component, 5M1…First movable side metal component, 5M2…Second movable side metal component, 5M3…Third movable side metal component, 5M4…Fourth movable side metal component, 6…Leaf spring, 6A…First leaf spring, 6A1…First portion, 6A2…Second portion, 6A3… The third part, 6A4... The fourth part, 6A5... The fifth part, 6AH1... The first through hole, 6AH2... The second through hole, 6AH3... The third through hole, 6AH4... The fourth through hole, 6AH5... The fifth through hole, 6B... The second leaf spring, 6B1... The first part, 6B2... The second part, 6B3... The third part, 6B4... The fourth part, 6B5... The fifth part, 6BH1... The first through hole, 6BH2... The second through hole, 6BH3... The third through hole, 6BH4... The fourth through hole, 6BH5... The fifth through hole, 6D... The lower leaf spring, 6DA... The first lower leaf spring, 6DB... The second lower leaf spring, 6U... The upper leaf spring, 7... The magnet, 7L... The left magnet, 7R... The right magnet, 8... The wire ring, 10…first magnetic component, 10A…first magnet, 10B…second magnet, 18…base component, 18B…base, 18D…fixed side pedestal, 18D1…first fixed side pedestal, 18D2…second fixed side pedestal, 18E…side, 18E1…first side, 18E2…second side, 18E3…third side, 18E4…fourth side, 18K…opening, 18T…protrusion, 18V…protrusion, 101, 101A…lens driving device, AH…rectangular hole, CD…camera module, CM…conductive component, CM1…first conductive component, CM2…second conductive component, CM3…third conductive component, CM4…fourth conductive component, CM5…fifth conductive component,CM6…sixth conductive component, CM7…seventh conductive component, CM8…eighth conductive component, CM9…ninth conductive component, CM10…tenth conductive component, CM11…eleventh conductive component, CP9…ninth joint surface, CP10…tenth joint surface, CSL…lower side opposing surface, CSL1…lower side opposing surface, CSL2…lower side opposing surface, CSU…upper side opposing surface, CSU1…upper side opposing surface, CSU2…upper side opposing surface, DM…driving part, ED1…first connecting part, ED2…second connecting part, ED3…third connecting part, ED4…fourth connecting part, E D5…fifth connecting portion, ED6…sixth connecting portion, ED7…seventh connecting portion, ED8…eighth connecting portion, EM…embedded portion, EM1…first embedded portion, EM2…second embedded portion, EM3…third embedded portion, EM4…fourth embedded portion, EP…exposed portion, EP1…first exposed portion, EP2…second exposed portion, EP3…third exposed portion, EP4…fourth exposed portion, FB…fixed side component, GV…groove portion, HR…housing portion, HR1…first housing portion, HR2…second housing portion, IS…imaging element, J1~J4…holding portion, LS…lens body, MA…metal connected body, MA1...first metal connected body, MA2...second metal connected body, MA3...third metal connected body, MA4...fourth metal connected body, MB...movable side component, MG...second magnetic component, MG1...first metal plate, MG2...second metal plate, OA...optical axis, PT...pattern, RC...recess, RH...through portion, SA...shape memory alloy wire, SA1...first wire, SA2...second wire, SA3...third wire, SA4...fourth wire, SA5...fifth wire, SA6...sixth wire, SA7...seventh wire, SA8...eighth wire, SB...substrate, SE...exposed outside Outlet, SE1...first outer exposed part, SE2...second outer exposed part, SE3...third outer exposed part, SE4...fourth outer exposed part, TM1...first terminal part, TM2...second terminal part, TM3...third terminal part, TM4...fourth terminal part, TM5...fifth terminal part, TM6...sixth terminal part, TM7...seventh terminal part, TM8...eighth terminal part, TM9...ninth terminal part, TM10...tenth terminal part, TM11...eleventh terminal part, UE...upper exposed part, UE1...first upper exposed part, UE2...second upper exposed part, WL...weld line. ,

Claims

1. A lens driving device, comprising: Fixed side parts; a lens holding member having a cylindrical portion capable of fixing the lens body by an adhesive; and a driving unit that moves the lens holding member relative to the fixed-side member, It is characterized in that The lens holding member is formed of a synthetic resin in which a metal connected body is embedded. The metal adherend has an embedded portion embedded in the cylindrical portion and an exposed portion exposed on the inner surface of the cylindrical portion. The metal adherend is configured so that the exposed portion becomes a portion that is bonded and fixed to the lens body. The metal adherend is arranged at a position corresponding to a weld line formed when the lens holding component is molded.

2. The lens driving device according to claim 1, wherein: The metal welded body disposed at a position corresponding to the weld line is exposed on the surface of the cylindrical portion.

3. The lens driving device according to claim 1, wherein: The metal contact body includes a first metal contact body and a second metal contact body, the first metal contact body and the second metal contact body are separated from each other and arranged at different positions in the circumferential direction of the cylindrical portion, The first metal adhered body and the second metal adhered body respectively have the embedded portion and the exposed portion. The first metal bonded body is arranged at a position corresponding to the weld line.

4. The lens driving device according to claim 3, wherein: The exposed portion of each of the first metal contacted body and the second metal contacted body extends along the circumferential direction of the cylindrical portion.

5. The lens driving device according to any one of claims 1 to 3, characterized in that: The exposed portion includes a plurality of recessed portions extending in a circumferential direction of the cylindrical portion and capable of accommodating the adhesive.

6. The lens driving device according to claim 5, characterized in that: The plurality of recessed portions are formed by a plurality of groove portions extending in the circumferential direction of the cylindrical portion.

7. The lens driving device according to claim 1, wherein: The driving unit is composed of a shape memory alloy wire provided between a movable side member including the lens holding member and the fixed side member. One end of the shape memory alloy wire is fixed to a movable side metal component, and the movable side metal component is provided on the movable side component. The other end of the shape memory alloy wire is fixed to a fixed side metal component, and the fixed side metal component is provided on the fixed side component. The metal contact body further includes an outer exposed portion exposed on the outer surface of the lens holding member. The movable-side metal member is fixed to the outer exposed portion.

8. The lens driving device according to claim 7, wherein: The movable-side metal member and the outer exposed portion are welded.

9. A camera module, characterized in that: have: The lens driving device according to any one of claims 1 to 3; The lens body is fixed to the lens holding member by the adhesive; and An imaging element is disposed opposite to the lens body.

Images