Lens driving device and camera module

Abstract

Provided is a lens drive device capable of suppressing the generation of sound at a stopper. The lens driving device (101) is provided with: a fixed side member (FB) including a base member (18); a lens holding member (2) having a cylindrical portion (12) capable of holding the lens body; and a plurality of shape memory alloy wires (SA) that move the lens holding member (2) relative to the fixed-side member (FB). The fixed-side member (FB) has a fixed-side contact section (FC) that constitutes a stopper section (ST) that restricts the movement of the lens holding member (2). The lens holding member (2) has an elastic body portion (7) formed of a material softer than a synthetic resin material constituting a cylindrical portion (12) of the lens holding member (2). The elastic body part (7) has a movable-side contact part (MC) that faces the fixed-side contact part (FC) of the stopper part (ST) so as to be able to abut against the fixed-side contact part (FC) of the stopper part (ST).

Description

Technical Field

[0001] The present disclosure relates to a lens driving device. Background Art

[0002] Conventionally, there is known a lens driving device that moves a lens holding member using a shape memory alloy wire (see Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2022-074138 Summary of the invention

[0006] Problems to be solved by the invention

[0007] The lens driving device includes a spacer member disposed on the upper side of the lens holding member, and the spacer member and the lens holding member form a stopper for restricting the lens holding member from excessively moving upward.

[0008] Therefore, when vibration or the like is applied to the lens driving device to cause the lens holding member to move, the spacer member and the lens holding member come into contact with each other, and there is a risk of generating a collision sound.

[0009] Therefore, it is desirable to provide a lens driving device capable of suppressing the generation of sound at the stopper.

[0010] Means used to solve problems

[0011] A lens driving device according to an embodiment of the present invention comprises: a fixed side component, including a base component; a lens holding component, having a cylindrical portion capable of holding a lens body; and a plurality of shape memory alloy wires, which enable the lens holding component to move relative to the fixed side component, and is characterized in that the fixed side component has a fixed side abutment portion, which constitutes a stopper portion for limiting the movement of the lens holding component, the lens holding component has an elastomer portion, which is formed of a material softer than the synthetic resin material constituting the cylindrical portion of the lens holding component, and the elastomer portion has a movable side abutment portion, which can abut against the fixed side abutment portion of the stopper portion.

[0012] Effects of the Invention

[0013] The lens driving device can suppress the generation of sound at the stopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective view of a lens driving device.

[0015] Figure 2It is an exploded perspective view of the lens driving device.

[0016] Figure 3 It is a perspective view of metal parts connected to the lens holding part and the base part respectively.

[0017] Figure 4 This is a diagram of a metal component to which a shape memory alloy wire is mounted.

[0018] Figure 5 It is a three-dimensional diagram of the base component.

[0019] Figure 6 It is a diagram showing the positional relationship among the leaf spring, the shape memory alloy wire, the metal member, and the conductive member.

[0020] Figure 7 It is a top view of the leaf spring and metal parts.

[0021] Figure 8 This is a diagram showing an example of a connection structure between a fixed-side metal member and a conductive member.

[0022] Fig. 9 It is a perspective view of a spacer member, a lens holding member, an upper cover member, and a base member.

[0023] Fig.10 It is a three-dimensional view and a top view of the conductive component.

[0024] Fig.11 This is a detailed diagram of the lens holding component.

[0025] Fig.12 It is a three-dimensional view of the elastic body part and the lens holding component.

[0026] Fig.13 It is a top view of the lens holding component and the base component to which the elastic body part and the first magnetic component are attached.

[0027] Fig.14 It is a longitudinal sectional view of the lens holding component, the elastic body portion, the first magnetic component, the base component and the conductive component.

[0028] Fig.15 It is a longitudinal sectional view of the lens holding member, the elastic body portion, the base member, and the conductive member.

[0029] Fig.16 It is a cross-sectional view of the lens holding component, the elastic body portion, the first magnetic component, the base component and the conductive component.

[0030] Fig.17 It is a top view of the lens holding component and the base component to which the elastic body part and the first magnetic component are attached.

[0031] Description of Reference Numerals

[0032] DETAILED DESCRIPTION

[0033] Hereinafter, a lens driving device 101 according to an embodiment of the present invention will be described with reference to the drawings. Figure 1 is a perspective view of the lens driving device 101. Specifically, Figure 1 The upper figure is a top three-dimensional diagram of the lens driving device 101. Figure 1 The lower figure is a bottom stereoscopic view of the lens driving device 101. Figure 2 It is an exploded perspective view of the lens driving device 101 .

[0034] 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 (subject side) of the lens driving device 101, and the Z2 side of the lens driving device 101 corresponds to the lower side (photographing element side) of the lens driving device 101. The same is true in other figures.

[0035] like 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.

[0036] The cover member 4 is configured to function as a frame 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.

[0037] The upper cover part 4U has a rectangular cylindrical first outer peripheral wall portion 4A and a rectangular ring-shaped and flat top plate portion 4B provided in a continuous manner 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.

[0038] Similarly, 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 and a flat plate provided in a manner continuous 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.

[0039] like Figure 1 As shown, the upper cover member 4U is bonded to the lower cover member 4L by an adhesive. The second outer peripheral wall portion 4C is arranged so as to partially cover the first outer peripheral wall portion 4A.

[0040] like Figure 2 As shown, the spacer member 1, the lens holding member 2, the metal member 5, the leaf spring 6, the base member 18, the shape memory alloy wire SA, etc. are accommodated in the cover member 4.

[0041] The movable side member MB includes: a lens holding member 2 capable of holding a lens body (not shown); a shape memory alloy wire SA as a driving mechanism MK for moving the lens holding member 2 along the optical axis OA related to the lens body; and a leaf spring 6 for supporting the lens holding member 2 so as to be movable along the optical axis OA. The lens body is, for example, a cylindrical lens barrel having at least one lens, and is configured such that its central axis is along the optical axis OA.

[0042] The spacer member 1 is configured to prevent the lens holding member 2 formed of synthetic resin from colliding with the cover member 4 formed of metal when the lens holding member 2 moves in the Z1 direction. That is, the spacer member 1 is formed of synthetic resin and configured to form a space between the lens holding member 2 and the top plate portion 4B of the cover member 4. Moreover, the spacer member 1 is fixed to the upper cover member 4U by an adhesive. Specifically, the spacer member 1 and the lens holding member 2 constitute a first stopper ST1 that restricts excessive movement of the lens holding member 2, which is one of the stoppers ST that restricts excessive movement of the lens holding member 2, and restricts excessive movement of the lens holding member 2 in the Z1 direction (upward). In the present embodiment, the lens holding member 2 is configured to contact the spacer member 1 when it moves a predetermined distance in the Z1 direction. With this configuration, the spacer member 1 can prevent the lens holding member 2 formed of synthetic resin from contacting with the upper cover member 4U formed of metal, and prevent wear of the lens holding member 2 caused by such contact. However, if a space can be formed between the lens holding member 2 and the top plate portion 4B of the upper cover member 4U by other structures, the spacer member 1 can be omitted.

[0043] The lens holding member 2 is formed by injection molding a synthetic resin such as a liquid crystal polymer (LCP). Figure 2 As shown in FIG. 1 , the lens holding member 2 includes: a cylindrical portion 12 formed to extend 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 12. In the present embodiment, a spiral groove is formed on the inner circumferential surface of the cylindrical portion 12 so that the adhesive is spread between the lens body and the inner circumferential surface of the cylindrical portion 12. In addition, the spiral groove may be omitted.

[0044] 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 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 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 configured to be arranged alternately. Moreover, a portion of the leaf spring 6 is respectively placed on the two movable side seats 2D.

[0045] The drive mechanism MK includes a shape memory alloy wire SA as an example of a shape memory actuator. In the present embodiment, the shape memory alloy wire SA includes a first wire SA1 to an eighth wire SA8. When current flows through the shape memory alloy wire SA, the temperature rises and contracts in accordance with the temperature rise. The drive mechanism MK can use the contraction of the shape memory alloy wire SA to move the lens holding component 2 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 causes one or more of the other wires SA1 to SA8 to be stretched.

[0046] The leaf spring 6 is configured to support the lens holding member 2 movably 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, for example, 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.

[0047] The base member 18 is formed by injection molding using a synthetic resin such as a liquid crystal polymer (LCP). Figure 5 As shown in the above figure, the base member 18 has a substantially rectangular outline when viewed from above, and has an opening 18K in the center. Specifically, the base member 18 has a rectangular ring-shaped base 18B arranged in a manner surrounding the circular opening 18K. Moreover, the base 18B has four sides 18E (first side 18E1 to fourth side 18E4).

[0048] 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.

[0049] 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.

[0050] 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.

[0051] More specifically, the fixed side metal component 5F is also called a fixed side terminal plate, and includes a first fixed side terminal plate 5F1 to an eighth fixed side terminal plate 5F8. The movable side metal component 5M is also called a movable side terminal plate, and includes a first movable side terminal plate 5M1 to a fourth movable side terminal plate 5M4.

[0052] Next, refer to Figure 3 , the positional relationship between the lens holding component 2 and the base component 18 and the metal component 5 will be described. Figure 3 The upper figure is a perspective view of the lens holding component 2 to which the movable side metal component 5M (movable side terminal plate) and the leaf spring 6 are attached. Figure 3 The lower figure is a perspective view of the base member 18 to which the fixed side metal member 5F (fixed side terminal block) is mounted. Figure 3 In the figure above, a dot pattern is added to the movable side metal part 5M and the leaf spring 6. Figure 3 In the figure below, a dot pattern is added to the fixed side metal part 5F.

[0053] exist Figure 3 In the example shown in the figure above, the first movable side connection plate 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 portion 2D1. Specifically, the square protrusion 2V protruding outward (Y1 side) formed on the first movable side seat portion 2D1 and the rectangular hole AH (see Figure 4 In the engaged state (left figure of FIG. 2 ), the first movable side terminal plate 5M1 is fixed to the first movable side seat portion 2D1 by an adhesive. 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 terminal plate 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 terminal plate 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 terminal plate 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.

[0054] exist Figure 3 In the example shown in the following figure, the first fixed side terminal plate 5F1 and the second fixed side terminal plate 5F2 are fixed to the outer side surface (right side mounting surface) of the side wall of the first fixed side seat portion 18D1 arranged along the second side portion 18E2 of the base member 18 on the Y1 side. Specifically, two circular protrusions 18V protruding outward (Y1 side) formed on the first fixed side seat portion 18D1 and through holes RH (see Figure 4 The first fixed side wiring board 5F1 and the second fixed side wiring board 5F2 are fixed to the first fixed side base portion 18D1 by an adhesive. 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 wiring board 5F3 and the fourth fixed side wiring board 5F4 (in the left figure) are fixed to the first fixed side base portion 18D1 by an adhesive. Figure 3 The fifth fixed side terminal block 5F5 and the sixth fixed side terminal block 5F6 are fixed to the outer side surface (front side 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 terminal block 5F5 and the sixth fixed side terminal block 5F6 are fixed to the outer side surface (front side 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 terminal block 5F7 and the eighth fixed side terminal block 5F8 (at Figure 3 The second fixed side pedestal portion 18D2 (not visible in the following figure) is fixed to the outer side surface (left side mounting surface) of the side wall on the Y2 side of the second fixed side pedestal portion 18D2 arranged along the fourth side portion 18E4 of the base member 18.

[0055] like Figure 2 As shown, the shape memory alloy wire SA extends along the inner surface of the first peripheral wall portion 4A of the upper cover member 4U, and is configured to support the movable side member MB movably 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 as the movable side member MB movably relative to the base member 18 as 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.

[0056] Next, refer to Figure 4 , the metal component 5 to which the shape memory alloy wire SA is attached will be described. Figure 4The left figure is a diagram when the first wire SA1 respectively attached to the first movable side terminal block 5M1 and the first fixed side terminal block 5F1 and the second wire SA2 respectively attached to the first movable side terminal block 5M1 and the second fixed side terminal block 5F2 are viewed from the Y1 side. Figure 4 The right figure of is a diagram when the first wire SA1 installed on the first movable side terminal block 5M1 and the first fixed side terminal block 5F1 and the second wire SA2 installed on the first movable side terminal block 5M1 and the second fixed side terminal block 5F2 are viewed from the X1 side. Figure 4 The left picture and Figure 4 The positional relationship of the components shown in the right figure of FIG. 1 corresponds to the positional relationship when the lens driving device 101 is assembled. Figure 4 The left picture and Figure 4 In the right figure of , for the sake of clarity, the illustration of other components is omitted. Figure 4 The left picture and Figure 4 The following description of the right figure relates to the combination of the first line SA1 and the second line SA2, but 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 are also applicable.

[0057] Specifically, one end of the first wire SA1 is fixed to the first movable side wiring board 5M1 at the holding portion J3 on the lower side of the first movable side wiring board 5M1, and the other end of the first wire SA1 is fixed to the first fixed side wiring board 5F1 at the holding portion J2 of the first fixed side wiring board 5F1. Similarly, one end of the second wire SA2 is fixed to the first movable side wiring board 5M1 at the holding portion J1 on the upper side of the first movable side wiring board 5M1, and the other end of the second wire SA2 is fixed to the second fixed side wiring board 5F2 at the holding portion J4 of the second fixed side wiring board 5F2.

[0058] The holding portion J1 is formed by bending a portion of the first movable side connection plate 5M1. Specifically, a portion of the first movable side connection plate 5M1 is bent while clamping one end of the second wire SA2 to form the holding portion J1. In addition, one end of the second wire SA2 is fixed to the holding portion J1 by welding. The same applies to the holding portions J2 to J4.

[0059] like Figure 4 As shown in the left figure of FIG. 1 , the first wire SA1 and the second wire SA2 are arranged in a twisted position relative to each other. That is, the first wire SA1 and the second wire SA2 are arranged so as not to contact each other (non-contact).

[0060] Next, refer to Figure 5 , the details of the base member 18 which is a part of the fixed side member FB will be described. Figure 51 is a perspective view of the base member 18. Specifically, Figure 5 The upper figure is a three-dimensional view of the base member 18 with the conductive member CM removed. Figure 5 The central figure is a three-dimensional view of the conductive component CM buried in the base component 18, Figure 5 The lower figure is a three-dimensional view of the base member 18 in a state where the conductive member CM is buried. Figure 5 In the following figure, a dot pattern is added to the conductive part CM for clarity.

[0061] 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 in a state of being movable in the Z-axis direction parallel to the optical axis OA.

[0062] A fixed side seat portion 18D is formed on the upper surface of the subject side surface (Z1 side surface) of the base member 18. 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 across the optical axis OA.

[0063] In the base member 18, the Figure 5 The conductive component CM is as shown in the central figure of FIG. 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 (in the Z2 direction), and a ninth bonding surface portion CP9 and a tenth bonding surface portion CP10 exposed on the upper surface (the surface on the Z1 side) of the base component 18.

[0064] Specifically, the conductive component CM includes a first conductive component CM1 to an eleventh conductive component CM11. Moreover, 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 and an eleventh connecting portion ED11.

[0065] The first to fourth terminal portions TM1 to 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 to ninth terminal portions TM5 to TM9 are arranged along the first side portion 18E1 of the base member 18 .

[0066] That is, the first connection portion ED1 of the first conductive component CM1 is arranged along the second side 18E2 of the base component 18, and the first terminal portion TM1 of the first conductive component CM1 is arranged not along the second side 18E2 of the base component 18 but along the third side 18E3. Similarly, the second connection portion ED2 of the second conductive component CM2 is arranged along the second side 18E2 of the base component 18, and the second terminal portion TM2 of the second conductive component CM2 is arranged not along the second side 18E2 of the base component 18 but along the third side 18E3.

[0067] In addition, the seventh connection portion ED7 of the seventh conductive component CM7 is arranged along the fourth side 18E4 of the base component 18, and the seventh terminal portion TM7 of the seventh conductive component CM7 is arranged not along the fourth side 18E4 of the base component 18 but along the first side 18E1. Similarly, the eighth connection portion ED8 of the eighth conductive component CM8 is arranged along the fourth side 18E4 of the base component 18, and the eighth terminal portion TM8 of the eighth conductive component CM8 is arranged not along the fourth side 18E4 of the base component 18 but along the first side 18E1.

[0068] Thus, the first to eleventh terminal portions TM1 to TM11 are arranged along the first side portion 18E1 or the third side portion 18E3 of the base member 18 , rather than being arranged along the second side portion 18E2 and the fourth side portion 18E4 of the base member 18 .

[0069] Next, refer to Figure 6 as well as Figure 7 , the positional relationship among the leaf spring 6, the shape memory alloy wire SA, the metal member 5, and the conductive member CM will be described. Figure 6 as well as Figure 7 : is a diagram showing the positional relationship between the leaf spring 6, the shape memory alloy wire SA, the metal member 5, and the conductive member CM. Specifically, Figure 6 is a three-dimensional diagram of each component (leaf spring 6, shape memory alloy wire SA, metal component 5 and conductive component CM). Figure 7 is a top view of each component. Figure 7 In the figure, for the sake of clarity, the shape memory alloy wire SA and the conductive member CM are omitted. Figure 7 In the figure, a dot pattern is added to the leaf spring 6.

[0070] 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 ) of the first portion 6A1; fixed to the second fixed side seat portion 18D2 of the base member 18 (reference Figure 2 ) of the second portion 6A2; fixed to the first movable side seat portion 2D1 of the lens holding member 2 (reference Figure 2 ) of the third part 6A3; a fourth part 6A4 connecting the first part 6A1 with the third part 6A3; and a fifth part 6A5 connecting the second part 6A2 with the third part 6A3.

[0071] The first portion 6A1 has a first through hole 6AH1 and a second through hole 6AH2 formed therein for receiving a circular protrusion 18T (see FIG. 1 ) protruding upwardly formed on the first fixed side seat portion 18D1. Figure 3 In the present embodiment, the fixing of the leaf spring 6 and the protrusion 18T is achieved by hot riveting or cold riveting the protrusion 18T. However, the fixing of the leaf spring 6 and the protrusion 18T may also be achieved by an adhesive.

[0072] The second portion 6A2 is formed with a third through hole 6AH3 and a fourth through hole 6AH4. The third through hole 6AH3 is provided for a circular protrusion 18T (see FIG. 1 ) protruding upward formed on the second fixed side seat portion 18D2. Figure 3 The fourth through hole 6AH4 is used to connect with the tenth bonding surface CP10 (see the figure below) of the tenth conductive component CM10. Figure 5 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.

[0073] The third portion 6A3 is formed with a fifth through hole 6AH5 and a sixth through hole 6AH6, through which a circular protrusion 2T (see FIG. 2 ) protruding upward formed on the first movable side pedestal 2D1 is formed. 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.

[0074] 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.

[0075] The first portion 6B1 has a first through hole 6BH1 and a second through hole 6BH2. The first through hole 6BH1 is provided for a circular protrusion 18T (see FIG. 1 ) protruding upward and formed on the first fixed side seat portion 18D1. Figure 3 The second through hole 6BH2 is used to connect with the ninth bonding surface CP9 of the ninth conductive component CM9 (see Figure 5 of the figure below).

[0076] The second portion 6B2 is formed with a third through hole 6BH3 and a fourth through hole 6BH4, through which a circular protrusion 18T (see FIG. 1 ) protruding upward and formed on the second fixed side seat portion 18D2 is formed. Figure 3 Plug in the following figure).

[0077] The third portion 6B3 is formed with a fifth through hole 6BH5 and a sixth through hole 6BH6, through which a circular protrusion 2T (see FIG. 2 ) protruding upwardly formed on the second movable side pedestal 2D2 is formed. Figure 3 (see the figure above) plug in.

[0078] 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 arms 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.

[0079] like Figure 7 As shown, the first leaf spring 6A and the second leaf spring 6B have substantially the same shape. Specifically, the first leaf spring 6A and the second leaf spring 6B are configured to be rotationally symmetrical twice 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).

[0080] like Figure 6 As shown, the first connection portion ED1 of the first conductive component CM1 is joined to the connection portion CT1 of the first fixed-side connection plate 5F1 by soldering. That is, the first connection portion ED1 and the connection portion CT1 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 connection portion CT2 of the second fixed-side connection plate 5F2 by soldering, the third connection portion ED3 of the third conductive component CM3 is joined to the connection portion CT3 of the third fixed-side connection plate 5F3 by soldering, and the fourth connection portion ED4 of the fourth conductive component CM4 is joined to the connection portion CT4 of the fourth fixed-side connection plate 5F4 by soldering. In addition, the fifth connection portion ED5 of the fifth conductive component CM5 is connected to the connection portion CT5 of the fifth fixed-side terminal board 5F5 by soldering, the sixth connection portion ED6 of the sixth conductive component CM6 is connected to the connection portion CT6 of the sixth fixed-side terminal board 5F6 by soldering, the seventh connection portion ED7 of the seventh conductive component CM7 is connected to the connection portion CT7 of the seventh fixed-side terminal board 5F7 by soldering, and the eighth connection portion ED8 of the eighth conductive component CM8 is connected to the connection portion CT8 of the eighth fixed-side terminal board 5F8 by soldering.

[0081] like Figure 7As shown, the connection portion CT9 of the first movable side connection plate 5M1 is vertically joined to the third portion 6A3 of the first leaf spring 6A by brazing. That is, the connection portion CT9 and the third portion 6A3 are joined in a state where the surfaces of each other are substantially perpendicular. Similarly, the connection portion CT10 of the second movable side connection plate 5M2 is vertically joined to the third portion 6A3 of the first leaf spring 6A by brazing, the connection portion CT11 of the third movable side connection plate 5M3 is vertically joined to the third portion 6B3 of the second leaf spring 6B by brazing, and the connection portion CT12 of the fourth movable side connection plate 5M4 is vertically joined to the third portion 6B3 of the second leaf spring 6B by brazing.

[0082] On the other hand, Figure 7 As shown, the first fixed-side terminal plate 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 terminal plate 5F3 does not contact the second portion 6A2 of the first leaf spring 6A, the fifth fixed-side terminal plate 5F5 does not contact the first portion 6B1 of the second leaf spring 6B, and the seventh fixed-side terminal plate 5F7 does not contact the second portion 6B2 of the second leaf spring 6B.

[0083] like Figure 6 As shown, the ninth bonding surface CP9 (refer to Figure 5 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 5 (center figure) At the fourth through hole 6AH4 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.

[0084] When the first terminal portion TM1 of the first conductive member CM1 is connected to a high potential and the tenth terminal portion TM10 of the tenth conductive member CM10 is connected to a low potential, current flows from the first terminal portion TM1 to the first fixed-side connection plate 5F1 through the first conductive member CM1. Then, the current passes through the first fixed-side connection plate 5F1, passes through the first wire SA1, and then passes through the first movable-side connection plate 5M1. Then, the current passes through the third portion 6A3, the fifth portion 6A5, and the second portion 6A2 of the first leaf spring 6A, and then flows to the tenth terminal portion TM10 through the tenth conductive member CM10.

[0085] When 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 to the second fixed-side connection plate 5F2 through the second conductive component CM2. Then, the current passes through the second fixed-side connection plate 5F2, through the second wire SA2, and then through the first movable-side connection plate 5M1. Then, the current passes through the third portion 6A3, the fifth portion 6A5, and the second portion 6A2 of the first leaf spring 6A, and then flows to the tenth terminal portion TM10 through the tenth conductive component CM10.

[0086] When the first terminal portion TM1 of the first conductive member CM1 and the second terminal portion TM2 of the second conductive member CM2 are connected to a high potential, the path of the current flowing from the first movable-side terminal plate 5M1 to the tenth terminal portion TM10 is the same.

[0087] 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.

[0088] The lens driving device 101 having a substantially rectangular parallelepiped shape is mounted on, for example, an external substrate (not shown) on which an imaging element (not shown) is mounted. The camera module is composed of, for example, an external substrate, the lens driving device 101, a lens body mounted on the lens holding member 2, and an imaging element mounted on the external substrate in a manner facing the lens body. The camera module may also include a control device composed of a microcomputer including a CPU and a memory.

[0089] 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 mechanism MK to move the lens holding member 2 in the direction parallel to the optical axis OA on the Z1 side (subject side) of the imaging element. Moreover, by moving the lens holding member 2 in this way, the control device may also realize an automatic focus adjustment function as one of the lens adjustment functions. Specifically, the control device may also move the lens holding member 2 in the direction away from the imaging element to enable macro photography, and move the lens holding member 2 in the direction close to the imaging element to enable infinity photography.

[0090] Furthermore, 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.

[0091] Next, refer to Figure 8 , an example of a connection structure for connecting the fixed-side metal member 5F (fixed-side terminal plate) and the conductive member CM will be described. Figure 8 1 is a diagram showing an example of a connection structure for connecting the fixed side metal component 5F (fixed side terminal block) and the conductive component CM. Specifically, Figure 8 The upper figure is a perspective view of the entire base member 18 to which the fixed-side metal member 5F (fixed-side terminal block) is mounted. Figure 8 The following figure is viewed from the Y1 side. Figure 8 The enlarged side view of the range R1 surrounded by the dotted line shown in the above figure. Figure 8 In the figure, for the sake of clarity, a coarse dot pattern is added to the fixed-side metal component 5F (fixed-side terminal plate), and a fine dot pattern is added to the conductive component CM.

[0092] like Figure 8 As shown in the figure below, the first fixed side connection plate 5F1 is mounted on the outer side surface (right side mounting surface) of the side wall on the Y1 side of the first fixed side seat portion 18D1 of the base member 18 by means of a light-curing adhesive. Furthermore, the connection portion CT1 of the first fixed side connection plate 5F1 is bonded to the first connection portion ED1 of the first conductive member CM1 via a bonding material SD. The bonding material SD is, for example, solder or a conductive adhesive. Figure 8 In the following figure, a cross pattern is added to the bonding material SD for clarity.

[0093] Similarly, the second fixed-side connection plate 5F2 is attached to the outer side surface (right mounting surface) of the side wall on the Y1 side of the first fixed-side pedestal portion 18D1 in the base member 18 by means of a light-curing adhesive. Furthermore, the connection portion CT2 of the second fixed-side connection plate 5F2 is bonded to the second connection portion ED2 of the second conductive member CM2 via the bonding material SD.

[0094] Next, refer to Fig. 9 Next, a configuration for restricting the movement of the lens holding member 2 relative to the base member 18 when the shape memory alloy wire SA is not energized will be described. Fig. 9 It is a perspective view of the spacer member 1 , the lens holding member 2 , the upper cover member 4U, and the base member 18 .

[0095] like Fig. 9 As shown, the lens holding member 2 includes a cylindrical portion 12 extending in the optical axis direction and accommodating the lens body therein, and a movable side seat portion 2D and a protruding portion 2S protruding from the cylindrical portion 12 toward the corner 4E at a position corresponding to the corner 4E of the upper cover member 4U.

[0096] Specifically, the upper cover member 4U has four corners 4E. The four corners 4E include a first corner 4E1 disposed between the first side plate portion 4A1 and the fourth side plate portion 4A4, a second corner 4E2 disposed between the first side plate portion 4A1 and the second side plate portion 4A2, a third corner 4E3 disposed between the second side plate portion 4A2 and the third side plate portion 4A3, and a fourth corner 4E4 disposed between the third side plate portion 4A3 and the fourth side plate portion 4A4.

[0097] The lens holding component 2 has: a second movable side seat portion 2D2 protruding from the cylindrical portion 12 toward the first corner portion 4E1; a first protruding setting portion 2S1 protruding from the cylindrical portion 12 toward the second corner portion 4E2; a first movable side seat portion 2D1 protruding from the cylindrical portion 12 toward the third corner portion 4E3; and a second protruding setting portion 2S2 protruding from the cylindrical portion 12 toward the fourth corner portion 4E4.

[0098] A receiving portion HR opening upward (Z1 direction) is formed on the protruding portion 2S. Furthermore, a 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 on the first protruding portion 2S1, and a second receiving portion HR2 opening upward is formed on 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.

[0099] The first magnetic member 10 is used to be connected to the second magnetic member MG (see Fig.10 ) between the components that generate magnetic attraction. Fig. 9 In the example shown, 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 bipolar permanent magnets. However, the first magnetic component 10 may not be a magnet as long as it can generate magnetic attraction between it and the second magnetic component MG. In this case, the first magnetic component 10 may be, for example, a magnetic metal or a magnetic resin material. In addition, the first magnetic component 10 may be embedded in the lens holding component 2 by embedding molding, or may be adhered to the lens holding component 2.

[0100] Next, refer to Fig.10 , 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. Fig.10 1 shows the positional relationship between the first magnetic member 10 mounted on 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, Fig.10The above figure is a three-dimensional diagram of the first magnetic component 10 and the conductive component CM. Fig.10 The figure below is a top view of the conductive component CM. Fig.10 The above picture and Fig.10 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. Fig.10 The above picture and Fig.10 In the figure below, for the sake of clarity, 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. Fig.10 In the following figure, for the sake of clarity, the outline of the first magnetic component 10 is shown by a dotted line.

[0101] 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. Fig.10 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 forms a part of the second conductive component CM2, and the second metal plate MG2 forms a part of the eighth conductive component CM8. However, the second magnetic component MG may not 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.

[0102] When the shape memory alloy wire SA is not energized, Fig.10 The above picture and Fig.10 As shown in the following figure, the first magnetic component 10 is arranged in a receiving portion HR formed in a protruding portion 2S of the lens holding component 2 so as to be located directly above the second magnetic component MG while being separated from the second magnetic component MG by a predetermined distance.

[0103] Moreover, if Fig.10As shown in the figure below, the first magnetic component 10 and the second magnetic component MG are configured so that the area of ​​the upper opposing surface CSU of the first magnetic component 10 opposing the second magnetic component MG and the area of ​​the lower opposing surface CSL of the second magnetic component MG opposing the first magnetic component 10 are approximately equal. This is because, in the case where the area of ​​the upper opposing surface CSU is significantly different from the area of ​​the lower opposing surface CSL, when the first magnetic component 10 is attracted to the second magnetic component MG due to the magnetic attraction generated between the first magnetic component 10 and the second magnetic component MG and is stationary, the positional relationship between the first magnetic component 10 and the second magnetic component MG deviates.

[0104] Specifically, if Fig.10 As shown in the figure below, 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 opposite to the first metal plate MG1 and the area of ​​the lower opposing surface CSL1 of the first metal plate MG1 opposite to the first magnet 10A are substantially equal. 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 opposite to the second metal plate MG2 and the area of ​​the lower opposing surface CSL2 of the second metal plate MG2 opposite to the second magnet 10B are substantially equal.

[0105] In addition, Fig.10 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. Fig.10 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.

[0106] like Fig. 9 As shown, the base member 18 has a fixed side seat portion 18D and a stopper convex portion 18S protruding upward from the base portion 18B at a position corresponding to the corner portion 4E of the upper cover member 4U. The stopper convex portion 18S includes a first stopper convex portion 18S1 and a second stopper convex portion 18S2. Specifically, the base member 18 has a second stopper convex portion 18S2 provided near the first corner portion 4E1, a first fixed side seat portion 18D1 provided near the second corner portion 4E2, a first stopper convex portion 18S1 provided near the third corner portion 4E3, and a second fixed side seat portion 18D2 provided near the fourth corner portion 4E4.

[0107] The fixed side seat 18D is provided with a stopper recess SB which is open upward (in the Z1 direction) and inward (in the direction close to the optical axis OA). Specifically, the first stopper recess SB1 which is open upward and inward is formed on the first fixed side seat 18D1, and the second stopper recess SB2 which is open upward and inward is formed on the second fixed side seat 18D2. Furthermore, the stopper recess SB accommodates the protruding portion 2S which functions as a stopper projection.

[0108] like Fig.11 As shown in FIG. 1 , in the lens holding member 2 , a stopper recess CV is formed on the lower surface (the surface on the Z2 side) of the movable-side pedestal portion 2D. Fig.11 Detailed diagram of the lens holding component 2. Specifically, Fig.11 The upper figure is a bottom view of the lens holding component 2. Fig.11 The central figure is a bottom perspective view of the lens holding component 2. Fig.11 The following picture is Fig.11 The enlarged view of the range R2 surrounded by the dotted line shown in the central figure. Fig.11 In the figure, for the sake of clarity, a dot pattern is added to the stopping recess CV.

[0109] Specifically, the first movable side seat part 2D1 and the second movable side seat part 2D2 each include a cylindrical wall part TW that is roughly hexagonal in shape when viewed from above, and an upper wall part UW that is provided in a manner that connects the upper part of the cylindrical wall part TW. Furthermore, a first stopper recess CV1 divided by the cylindrical wall part TW and the upper wall part UW is formed on the lower surface of the first movable side seat part 2D1, and a second stopper recess CV2 divided by the cylindrical wall part TW and the upper wall part UW is formed on the lower surface of the second movable side seat part 2D2. In addition, a through portion TH is formed in the upper wall part UW that constitutes the inner bottom surface IBF on the Z1 side of each of the first stopper recess CV1 and the second stopper recess CV2. In the example shown in the figure, the through portion TH is a substantially rectangular through hole that extends in the Z-axis direction and is completely closed, but it may also be a partially open notch.

[0110] As described above, the stopper recess CV includes the first stopper recess CV1 and the second stopper recess CV2. The stopper recess CV is configured to receive the stopper protrusion 18S (see FIG. 1 ) formed on the base member 18 in a non-contact manner. Fig. 9 As described above, the stopper projection 18S includes the first stopper projection 18S1 and the second stopper projection 18S2.

[0111] The stopper recess CV is configured to cooperate with the stopper protrusion 18S to limit the excessive movement of the lens holding member 2. Specifically, the stopper recess CV is configured to contact the stopper protrusion 18S when the movement of the lens holding member 2 becomes excessively large, thereby limiting the excessive movement of the lens holding member 2. The excessive movement of the lens holding member 2 includes at least one of excessive rotation of the lens holding member 2 around the optical axis OA, excessive translation of the lens holding member 2 in the X-axis direction, and excessive translation of the lens holding member 2 in the Y-axis direction.

[0112] More specifically, the first stop recess CV1 is configured to receive the first stop protrusion 18S1 in a non-contact manner in the neutral state, and the second stop recess CV2 is configured to receive the second stop protrusion 18S2 in a non-contact manner in the neutral state. The neutral state of the lens drive device 101 refers to, for example, a state in which the lens holding component 2 is located at the center of the movable range in the three mutually orthogonal axis directions (X-axis direction, Y-axis direction, and Z-axis direction). Typically, in the neutral state of the lens drive device 101, the lens holding component 2 is located at the center of the movable range in the three axis directions. However, the initial state of the lens drive device 101 when power is not supplied to the shape memory alloy wire SA may also be set to the neutral state.

[0113] In addition, the stopper recess SB of the base member 18 (see Fig. 9 ) is configured to receive the protruding portion 2S (stopping convex portion) of the lens holding member 2 in a non-contact manner in the neutral state. Furthermore, the stopping recess SB is configured to restrict the excessive movement of the lens holding member 2 in cooperation with the stopping convex portion (protruding portion 2S). Specifically, the stopping recess SB is configured to contact the stopping convex portion (protruding portion 2S) to restrict the excessive movement of the lens holding member 2 when the movement of the lens holding member 2 becomes excessive.

[0114] More specifically, the stopper recess SB (see Fig. 9 ) includes a first stopper recess SB1 formed on the inner side of the first fixed side seat portion 18D1 and a second stopper recess SB2 formed on the inner side of the second fixed side seat portion 18D2. Moreover, the first stopper recess SB1 is configured to receive the first stopper protrusion (first protruding portion 2S1) in a non-contact manner in a neutral state, and the second stopper recess SB2 is configured to receive the second stopper protrusion (second protruding portion 2S2) in a non-contact manner in a neutral state.

[0115] In this way, the stopping recess CV (movable side seat portion 2D) and the stopping protrusion (protruding portion 2S) in the lens holding component 2 and the stopping recess SB (fixed side seat portion 18D) and the stopping protrusion 18S in the base component 18 constitute a stopping portion ST for limiting excessive movement of the lens holding component 2.

[0116] Specifically, the stopper ST is configured to restrict the movement of the lens holding member 2 relative to the fixed-side member FB by making a part of the fixed-side member FB contact a part of the lens holding member 2. The elastic body portion 7 is provided on the part of the lens holding member 2 contacting a part of the fixed-side member FB.

[0117] The elastic body portion 7 is formed of a material softer than the synthetic resin material constituting the cylindrical portion 12 of the lens holding member 2. For example, the elastic body portion 7 is formed of a polyimide resin, silicone rubber, or an elastomer that is softer than the synthetic resin material such as liquid crystal polymer (LCP) constituting the cylindrical portion 12. In the present embodiment, the elastic body portion 7 is formed of silicone rubber that is easy to be molded (secondary molding (Japanese: double molding)).

[0118] In the example shown in the figure, the elastic body portion 7 is integrated with the lens holding member 2 by secondary molding. Specifically, the elastic body portion 7 includes a first elastic body portion 7A integrated with the movable side seat portion 2D of the lens holding member 2 and a second elastic body portion 7B integrated with the protruding portion 2S of the lens holding member 2. In addition, secondary molding (double molding) is also called two color molding (two color molding) or two-stage molding (double shot molding).

[0119] Fig.12 2 is a perspective view of the elastic body portion 7 and the lens holding member 2. Specifically, Fig.12 The upper figure is a top three-dimensional view of the elastic body portion 7 and the lens holding component 2. Fig.12 The lower figure is a bottom stereoscopic view of the elastic body portion 7 and the lens holding component 2. In addition, Fig.12 For the purpose of explanation, the lens holding member 2 and the elastic body portion 7 are shown as being separated from each other. However, in reality, the lens holding member 2 and the elastic body portion 7 are integrated in an inseparable manner (see Fig. 9 ). That is, the elastic body portion 7 constitutes a part of the lens holding member 2.

[0120] More specifically, the first elastic body portion 7A includes a first right rear elastic body portion 7A1 provided on the first movable side seat portion 2D1 and a first left front elastic body portion 7A2 provided on the second movable side seat portion 2D2. The first right rear elastic body portion 7A1 and the first left front elastic body portion 7A2 are formed in the same shape and the same size. The first right rear elastic body portion 7A1 and the first left front elastic body portion 7A2 respectively include: an upper portion UP1 configured in a state where a portion is in contact with the upper surface of the upper wall portion UW of the movable side seat portion 2D; a stop recess CV (refer to Fig.11 ) is disposed in a state where the upper surface (inner bottom surface IBF) and the inner peripheral surface IF of the lens holding member 2 are in contact; and a first connecting portion CN1 is disposed in the through portion TH to connect the upper portion UP1 and the lower portion LP1. In addition, the lower portion LP1 includes a top portion CW disposed on the lower surface of the upper wall portion UW of the lens holding member 2 (the top surface of the stopper recess CV, i.e., the inner bottom surface IBF) and an inner peripheral surface IF (see Fig.11 The inner peripheral surface SW of the (below) image.

[0121] In addition, the second elastic body portion 7B includes a second right front elastic body portion 7B1 provided on the first protruding portion 2S1 and a second left rear elastic body portion 7B2 provided on the second protruding portion 2S2. The second right front elastic body portion 7B1 and the second left rear elastic body portion 7B2 respectively include: an upper portion UP2 configured in contact with the upper surface of the protruding portion 2S; a lower portion LP2 configured in contact with the lower surface of the protruding portion 2S; and a second connecting portion CN2 configured in contact with the side surface of the protruding portion 2S and connecting the upper portion UP2 and the lower portion LP2.

[0122] like Fig. 9 As shown, the stopper ST for limiting the movement of the lens holding member 2 is composed of a combination of a movable side abutting portion MC and a fixed side abutting portion FC that abut against each other. Specifically, the stopper ST includes a first stopper ST1 for limiting the movement of the lens holding member 2 to the Z1 side (upper side), a second stopper ST2 for limiting the movement of the lens holding member 2 to the Z2 side (lower side), and a third stopper ST3 and a fourth stopper ST4 for limiting the movement of the lens holding member 2 in a direction intersecting the optical axis direction.

[0123] Furthermore, the first stopper ST1 is composed of a combination of the first movable side contact portion MC1 and the first fixed side contact portion FC1, the second stopper ST2 is composed of a combination of the second movable side contact portion MC2 and the second fixed side contact portion FC2, the third stopper ST3 is composed of a combination of the third movable side contact portion MC3 and the third fixed side contact portion FC3, and the fourth stopper ST4 is composed of a combination of the fourth movable side contact portion MC4 and the fourth fixed side contact portion FC4. That is, the movable side contact portion MC includes the first movable side contact portion MC1 to the fourth movable side contact portion MC4, and the fixed side contact portion FC includes the first fixed side contact portion FC1 to the fourth fixed side contact portion FC4.

[0124] In the example shown in the figure, Fig. 9 As shown, the first movable side contact portion MC1 includes the upper portion UP1 of the first right rear elastic body portion 7A1, the upper portion UP1 of the first left front elastic body portion 7A2, the upper portion UP2 of the second right front elastic body portion 7B1, and the upper portion UP2 of the second left rear elastic body portion 7B2. Fig. 9 As shown, the first fixed-side contact portion FC1 includes four corners 1E (first corner 1E1 to fourth corner 1E4 ) of the spacing member 1 .

[0125] The second movable side contact portion MC2 includes a top surface portion CW (see Fig.12 ), the top surface CW of the lower portion LP1 of the first left front elastic body portion 7A2 (refer to Fig.12 ), the lower part LP2 of the second right front elastic body part 7B1 (refer to Fig. 9 ) and the lower portion LP2 of the second left rear elastic body portion 7B2 (refer to Fig. 9 ). In addition, the second fixed side contact portion FC2 includes a front end surface FEF of the first stopper protrusion 18S1 of the base member 18 (see Fig. 9 ), the front end surface FEF of the second stopper protrusion 18S2 of the base member 18 (refer to Fig. 9 ), the bottom surface BTF of the first stopper recess SB1 in the first fixed side pedestal portion 18D1 of the base member 18 (refer to Fig.13 ) and the bottom surface BTF of the second stopper recess SB2 in the second fixed side pedestal portion 18D2 of the base member 18 (see Fig.13 ).

[0126] The third movable side contact portion MC3 includes an inner peripheral surface SW of the lower portion LP1 of the first right rear side elastic body portion 7A1 (see Fig.12 ) and the inner peripheral surface SW of the lower portion LP1 of the first left front elastic body portion 7A2 (see Fig.12In addition, the third fixed side contact portion FC3 includes a side surface SDF of the first stopper protrusion 18S1 of the base member 18 (see Fig. 9 ) and the side surface SDF of the second stopper protrusion 18S2 of the base member 18 (refer to Fig. 9 ).

[0127] In addition, if Fig. 9 As shown, the fourth movable side contact portion MC4 includes the second connection portion CN2 of the second right front elastic body portion 7B1 and the second connection portion CN2 of the second left rear elastic body portion 7B2. Fig. 9 As shown, the fourth fixed-side abutment portion FC4 includes a first stopper recess SB1 in the first fixed-side seating portion 18D1 of the base member 18 and a second stopper recess SB2 in the second fixed-side seating portion 18D2 of the base member 18 .

[0128] Next, refer to Fig.13 , the details of the stopper ST that restricts the movement of the lens holding component 2 will be described. Fig.13 1 is a top view of the lens holding member 2 to which the elastic body portion 7 and the first magnetic member 10 are mounted, and the base member 18 in which the second magnetic member MG is embedded. Fig.13 The upper figure is a plan view showing the entire lens holding component 2 and the base component 18. Fig.13 The following picture is Fig.13 The enlarged view of the range R3 surrounded by the dotted line shown in the above figure. Fig.13 In the figure, for the sake of clarity, a dot pattern is added to the lens holding component 2 and a cross pattern is added to the elastic body portion 7.

[0129] As described above, the fourth stopper ST4 is composed of a combination of the fourth movable side contact portion MC4 and the fourth fixed side contact portion FC4. Fig.13 As shown in the following figure, the fourth stopper ST4 includes a combination of a second left rear elastic body portion 7B2 having an outer peripheral surface CF (surface indicated by a dotted line) and a second fixed side seat portion 18D2 (second stopper recess SB2) as a wall portion, wherein the second fixed side seat portion 18D2 has an inner peripheral surface SF (surface indicated by a dotted line) opposed to the outer peripheral surface CF. In addition, the outer peripheral surface CF and the inner peripheral surface SF are spaced apart and opposed to each other, and are configured to be closest to the portion extending parallel to the X-axis and the portion extending parallel to the Y-axis. Similarly, as Fig.13 As shown in the above figure, the fourth stop portion ST4 includes a combination of a second right front elastic body portion 7B1 having an outer peripheral surface and a first fixed side seat portion 18D1 (first stop recess SB1) as a wall portion, and the first fixed side seat portion 18D1 has an inner peripheral surface opposed to its outer peripheral surface in a manner covering the outer peripheral surface.

[0130] With this configuration, when the lens holding member 2 is to be moved along Fig.13 When the upper arrow AR20 of the figure shows excessive rotation around the optical axis OA, in the fourth stopper ST4, as shown in FIG. Fig.13 As shown in the following figure, the right side portion CFR of the outer peripheral surface CF of the second left rear elastic body portion 7B2 contacts the right side portion SFR of the inner peripheral surface SF of the second fixed side seat portion 18D2 (second stopper recess SB2). As a result, excessive rotation of the lens holding component 2 around the optical axis OA is prevented by this contact. The outer peripheral surface of the second right front elastic body portion 7B1 contacts the inner peripheral surface of the first fixed side seat portion 18D1 (first stopper recess SB1) in the same manner, and these contacts occur at approximately the same timing.

[0131] In addition, when the lens holding member 2 is to be moved along Fig.13 When the upper arrow AR21 of the figure shows excessive rotation around the optical axis OA, in the fourth stopper ST4, as shown in FIG. Fig.13 As shown in the following figure, the left side portion CFL of the outer peripheral surface CF of the second left rear elastic body portion 7B2 contacts the left side portion SFL of the inner peripheral surface SF of the second fixed side seat portion 18D2 (second stopper recess SB2). As a result, excessive rotation of the lens holding component 2 around the optical axis OA is prevented by this contact. The outer peripheral surface of the second right front elastic body portion 7B1 contacts the inner peripheral surface of the first fixed side seat portion 18D1 (first stopper recess SB1) in the same manner, and these contacts occur at approximately the same timing.

[0132] Next, refer to Fig.14 , an example of the state of the lens driving device 101 when the stopper ST functions will be described. Fig.14 Shows that it contains Fig.13 The cross section of the lens holding member 2, the elastic body portion 7, the first magnetic member 10, the base member 18 and the conductive member CM on the plane perpendicular to the XY plane along the single-point dashed line L1 in the above figure. Specifically, Fig.14 The central figure shows the positional relationship of each component in the neutral state. Fig.14 The left figure shows the positional relationship of the various components when the lens holding component 2 moves downward (Z2 side). Fig.14 The right figure of FIG. 1 shows the positional relationship of each component when the lens holding component 2 moves upward (Z1 side). Fig.14 In FIG. 1 , the moving direction of the lens holding member 2 in the Z-axis direction is indicated by a black block arrow.

[0133] Specifically, if Fig.14As shown in the left figure of FIG. 1 , when the lens holding member 2 moves downward from the neutral state by a predetermined distance DS1, at the contact surface CTS1 indicated by the dotted circle, the lower part LP2 of the second movable side contact portion MC2 constituting the second stopper ST2 contacts the bottom surface BTF of the second fixed side contact portion FC2 constituting the second stopper ST2, thereby restricting the lens holding member 2 from further moving downward. The lower part LP2 is a part of the second right front elastic body portion 7B1, and the bottom surface BTF is a part of the first stopper recess SB1 in the first fixed side pedestal portion 18D1 of the base member 18.

[0134] In addition, if Fig.14 As shown in the right figure of FIG. 1 , when the lens holding member 2 moves upward from the neutral state by a predetermined distance DS2, at the contact surface CTS2 indicated by the dotted circle, the upper portion UP2 of the first movable side contact portion MC1 constituting the first stopper ST1 contacts the top surface CLF of the first fixed side contact portion FC1 constituting the first stopper ST1, thereby restricting the lens holding member 2 from further moving upward. In addition, the upper portion UP2 is a part of the second right front elastic body portion 7B1, and the top surface CLF is a part of the second corner portion 1E2 of the spacer member 1.

[0135] Next, refer to Fig.15 Another example of the state of the lens driving device 101 when the stopper ST functions will be described. Fig.15 Shows that it contains Fig.13 The cross section of the lens holding member 2, the elastic body portion 7, the base member 18 and the conductive member CM on the plane perpendicular to the XY plane along the single-dot chain line L2 in the above figure. Specifically, Fig.15 The central figure shows the positional relationship of each component in the neutral state. Fig.15 The left figure shows the positional relationship of the various components when the lens holding component 2 moves downward (Z2 side). Fig.15 The right figure of FIG. 1 shows the positional relationship of each component when the lens holding component 2 moves upward (Z1 side). Fig.15 In FIG. 1 , the moving direction of the lens holding member 2 in the Z-axis direction is indicated by a black block arrow.

[0136] Specifically, if Fig.15As shown in the left figure of FIG. 1 , when the lens holding member 2 moves downward from the neutral state by a predetermined distance DS1, at the contact surface CTS3 indicated by the dotted circle, the top surface CW of the second movable side contact portion MC2 constituting the second stopper ST2 contacts the front end surface FEF of the second fixed side contact portion FC2 constituting the second stopper ST2, thereby restricting the lens holding member 2 from further moving downward. The top surface CW is a part of the lower part LP1 of the first rear right elastic body portion 7A1, and the front end surface FEF is a part of the first stopper protrusion 18S1 of the base member 18.

[0137] In addition, if Fig.15 As shown in the right figure of FIG. 1 , when the lens holding member 2 moves upward from the neutral state by a predetermined distance DS2, at the contact surface CTS4 indicated by the dotted circle, the upper portion UP1 of the first movable side contact portion MC1 constituting the first stopper ST1 contacts the top surface CLF of the first fixed side contact portion FC1 constituting the first stopper ST1, thereby restricting the lens holding member 2 from further moving upward. The upper portion UP1 is a part of the first right rear elastic body portion 7A1, and the top surface CLF is a part of the third corner portion 1E3 of the spacer member 1.

[0138] Next, refer to Fig.16 , another example of the state of the lens driving device 101 when the stopper ST functions will be described. Fig.16 Shows that it contains Fig.14 The single-point dash line L3 in the central figure and Fig.15 The cross section of the lens holding member 2, the elastic body portion 7, the first magnetic member 10, the base member 18 and the conductive member CM on the plane parallel to the XY plane along the single-point dashed line L4 in the central figure. Specifically, Fig.16 The central figure shows the positional relationship of each component in the neutral state. Fig.16 The figure above shows the positional relationship of the various components when the lens holding component 2 moves to the right side (Y1 side). Fig.16 The figure below shows the positional relationship of the various components when the lens holding component 2 moves to the left side (Y2 side). Fig.16 In FIG. 1 , the moving direction of the lens holding member 2 in the Y-axis direction is indicated by a black block arrow.

[0139] Specifically, if Fig.16As shown in the above figure, when the lens holding component 2 moves a specified distance DS3 to the right from the neutral state, at each of the contact surfaces CTS11 and CTS13 indicated by the dotted circles, the left portion of the inner peripheral surface SW of the third movable side abutting portion MC3 constituting the third stop portion ST3 contacts the left portion of the side surface SDF of the third fixed side abutting portion FC3 constituting the third stop portion ST3, and at each of the contact surfaces CTS12 and CTS14 indicated by the dotted circles, the right portion of the second connecting portion CN2 of the fourth movable side abutting portion MC4 constituting the fourth stop portion ST4 contacts the right portion of the inner peripheral surface SF of the fourth fixed side abutting portion FC4 constituting the fourth stop portion ST4, thereby limiting the further movement of the lens holding component 2 to the right. In addition, the inner peripheral surface SW is a part of the lower side portion LP1 of the first elastic body portion 7A, the side surface SDF is a part of the stopping protrusion 18S of the base part 18, the second connecting portion CN2 is a part of the second elastic body portion 7B, and the inner peripheral surface SF is a part of the stopping recess SB.

[0140] In addition, if Fig.16 As shown in the figure below, when the lens holding component 2 moves a specified distance DS4 to the left from the neutral state, at each of the contact surfaces CTS15 and CTS17 indicated by the dotted circles, the right side portion of the inner peripheral surface SW of the third movable side abutment portion MC3 constituting the third stop portion ST3 contacts the right side portion of the side surface SDF of the third fixed side abutment portion FC3 constituting the third stop portion ST3, and at each of the contact surfaces CTS16 and CTS18 indicated by the dotted circles, the left side portion of the second connecting portion CN2 of the fourth movable side abutment portion MC4 constituting the fourth stop portion ST4 contacts the left side portion of the inner peripheral surface SF of the fourth fixed side abutment portion FC4 constituting the fourth stop portion ST4, thereby limiting the further movement of the lens holding component 2 to the left.

[0141] In addition, refer to Fig.16 The above description relates to the state of the lens driving device 101 when the stop part ST functions when the lens holding component 2 moves from the neutral state to the right side or the left side, but is also applicable to the state of the lens driving device 101 when the stop part ST functions when the lens holding component 2 moves from the neutral state to the front side or the rear side.

[0142] Next, refer to Fig.17 , another configuration example of the elastic body portion 7 is described. Fig.17 1 is a top view of the lens holding member 2 to which the elastic body portion 7 and the first magnetic member 10 are mounted and the base member 18 in which the conductive member CM is embedded. Fig.17 yes Fig.13The enlarged view of the range R3 surrounded by the dotted line in the above figure is Fig.13 In addition, Fig.17 In the figure, for the sake of clarity, a dot pattern is added to the lens holding component 2 and a cross pattern is added to the elastic body portion 7.

[0143] exist Fig.17 In the example shown, the elastomer portion 7 is integrated with the lens holding component 2 by secondary molding. Specifically, the second left rear elastomer portion 7B2, which is one of the second elastomer portions 7B constituting the elastomer portion 7, is integrated with the second protruding portion 2S2 in a manner that covers the surface (upper surface, side surface and lower surface) of the second protruding portion 2S2, and a recess RC is formed on the upper surface of the upper portion UP2. The recess RC is a structure for accommodating the protrusion formed during the secondary molding, namely the gate mark portion GM. That is, the recess RC is configured so that the upper end of the gate mark portion GM does not protrude further upward than the upper surface of the upper portion UP2. With this structure, the lens drive device 101 is as shown Fig.14 As shown in the right figure of FIG. 1 , when the lens holding member 2 moves upward from the neutral state by a predetermined distance DS2, the upper end of the gate trace portion GM, rather than the upper surface of the upper portion UP2, contacts the top surface CLF of the spacer member 1, thereby preventing the maximum upward movement of the lens holding member 2 from decreasing. In addition, the upper portion UP2 is a part of the second left rear elastic body portion 7B2 that functions as the first movable side contact portion MC1 constituting the first stopper ST1, and the top surface CLF is a part of the fourth corner portion 1E4 of the spacer member 1 that functions as the first fixed side contact portion FC1 constituting the first stopper ST1.

[0144] The same is true for the first right rear elastic body portion 7A1, the first left front elastic body portion 7A2, and the second right front elastic body portion 7B1. That is, the recessed portion RC may be provided on the upper surface of the upper portion UP1 of each of the first right rear elastic body portion 7A1 and the first left front elastic body portion 7A2, or may be provided on the upper surface of the upper portion UP2 of the second right front elastic body portion 7B1.

[0145] Alternatively, the concave portion RC may be provided on the lower surface of the lower portion LP2 of the second left rear elastic body portion 7B2 or other portions of the second left rear elastic body portion 7B2. The same applies to the first right rear elastic body portion 7A1, the first left front elastic body portion 7A2 and the second right front elastic body portion 7B1.

[0146] As mentioned above, Figure 2As shown, the lens driving device 101 of the embodiment of the present disclosure includes a fixed side member FB including a base member 18, a lens holding member 2 having a cylindrical portion 12 capable of holding a lens body, and a plurality of shape memory alloy wires SA that move the lens holding member 2 relative to the fixed side member FB. Fig. 9 As shown, the fixed side member FB has a fixed side abutment portion FC constituting a stopper portion ST for limiting the movement of the lens holding member 2. In addition, the lens holding member 2 has an elastic body portion 7 formed of a material softer than the synthetic resin material constituting the cylindrical portion 12 of the lens holding member 2. Moreover, the elastic body portion 7 has a movable side abutment portion MC that can abut against the fixed side abutment portion FC of the stopper portion ST.

[0147] By this configuration, the lens driving device 101 can reduce the sound generated when the fixed side abutment portion FC abuts against the movable side abutment portion MC, compared with a configuration without the elastic body portion 7, for example, a configuration in which the movable side abutment portion MC is formed of the same material as the synthetic resin material constituting the cylindrical portion 12 of the lens holding member 2. This is because the impact when the fixed side abutment portion FC abuts against the movable side abutment portion MC is absorbed by the elastic body portion 7. As a result, the lens driving device 101 can suppress the generation of abnormal noise. In addition, the lens driving device 101 can suppress foreign matter such as dust generated by repeated collisions between the fixed side abutment portion FC and the movable side abutment portion MC. That is, the heavier the lens body, the easier it is to generate such foreign matter, but this configuration can suppress the generation of foreign matter even when the lens body is heavy. In addition, the lens driving device 101 is mounted on a portable terminal such as a smartphone, and the collision between the fixed side abutment portion FC and the movable side abutment portion MC occurs, for example, when the user of the smartphone swings or drops the smartphone.

[0148] In addition, if Fig. 9 As shown, the stopper ST may also include a first stopper ST1 for limiting the movement of the lens holding member 2 toward the object side (Z1 side) and a second stopper ST2 for limiting the movement of the lens holding member 2 toward the image sensor side (Z2 side). Furthermore, the elastic body portion 7 may also include a first movable side contact portion MC1 that can be abutted against the first fixed side contact portion FC1 of the first stopper ST1 and a second fixed side contact portion FC2 (see also FIG. 1 ) that can be abutted against the second stopper ST2. Fig.13 The second movable side contact part MC2 (see also Fig.12 ).

[0149] With this configuration, the lens driving device 101 can reduce the sound generated when the fixed-side abutment portion FC abuts against the movable-side abutment portion MC not only when the lens holding component 2 moves toward the subject side (Z1 side) but also when the lens holding component 2 moves toward the imaging element side (Z2 side).

[0150] In addition, the first movable side contact portion MC1 and the second movable side contact portion MC2 may be as follows: Fig.12 Although shown as being continuously integrally formed, they may also be formed as separate independent components.

[0151] The integrated structure of the first movable side abutment portion MC1 and the second movable side abutment portion MC2 has an effect of improving the dimensional accuracy of the first movable side abutment portion MC1 and the second movable side abutment portion MC2 compared to the structure in which the first movable side abutment portion MC1 and the second movable side abutment portion MC2 are separated. In addition, when the elastic body portion 7 is formed by secondary molding, the integrated structure has an effect of higher productivity compared to the separated structure.

[0152] In addition, if Fig.12 As shown in the above figure, the movable side seat portion 2D of the lens holding component 2 may also have an upper wall portion UW, and the upper wall portion UW is formed with a through portion TH that penetrates in the optical axis direction. In this case, the elastic body portion 7 (first elastic body portion 7A) may also have a first connecting portion CN1 arranged on the through portion TH. Moreover, the first movable side abutment portion MC1 and the second movable side abutment portion MC2 may also be connected through the first connecting portion CN1. In addition, the first movable side abutment portion MC1 may also be arranged in a state of contact with the upper surface of the upper wall portion UW, and the second movable side abutment portion MC2 may also be arranged in a state of contact with the lower surface (top surface (inner bottom surface IBF of the stopping recess CV (refer to Fig.11 The contact state configuration of the above figure)). In addition, Fig.12 As shown in the above figure, the elastic body part 7 (first elastic body part 7A) can also be configured so that the (maximum) width WD0 of the first connecting part CN1 on the cross-section perpendicular to the optical axis OA is smaller than the (maximum) width WD1 of the first movable side abutting part MC1, and smaller than the (maximum) width WD2 of the second movable side abutting part MC2. In addition, the width WD0, the width WD1, and the width WD2 are all width dimensions in the tangent direction of the circle centered on the optical axis OA. In other words, the elastic body part 7 (first elastic body part 7A) can also be configured so that the cross-sectional shape of the upper part UP1 and the lower part LP1 (top surface CW) are each larger than the cross-sectional shape of the first connecting part CN1, and as a result, the upper part UP1 and the lower part LP1 cannot pass through the through-portion TH, respectively. That is, the first connecting part CN1 can also be a constricted portion that is thinner than the upper part UP1 located above it and the lower part LP1 (top surface CW) located below it.

[0153] This configuration has an effect of suppressing the elastic body portion 7 (first elastic body portion 7A) from being separated from the lens holding member 2, compared with a configuration in which the cross-sectional shape of the first connecting portion CN1 is larger than the cross-sectional shape of the upper portion UP1 or the lower portion LP1. In addition, this configuration has an effect of facilitating the integration of the elastic body portion 7 (first elastic body portion 7A) with respect to the lens holding member 2 by secondary molding. In addition, this configuration has an effect of making the portion of the upper portion UP1 that functions as the first movable side abutment portion MC1 wider than the cross-sectional shape of the first connecting portion CN1 while reducing the amount of material used.

[0154] In addition, if Figure 3 As shown in the above figure, the lens holding component 2 may also have a pair of movable side seats 2D protruding outward from the cylindrical portion 12. In this case, the pair of movable side seats 2D may also be arranged at positions opposite to each other across the optical axis OA. Moreover, a movable side metal component 5M for fixing one end of the shape memory alloy wire SA may be fixed to each of the pair of movable side seats 2D. In addition, as Fig.11 As shown in the above figure, the pair of movable side pedestal parts 2D can also be formed into a concave shape with an open bottom and have a cylindrical wall part TW. In this case, the upper wall part UW formed with the through part TH can also be located at a position connecting the upper part of the cylindrical wall part TW. In addition, as Fig. 9 As shown, the base component 18 may also have a base 18B and a pair of stopper protrusions 18S protruding upward from the base 18B. In this case, the pair of stopper protrusions 18S may also be arranged at positions opposite to each other across the optical axis OA. In addition, the pair of stopper protrusions 18S may also be arranged inside the respective cylindrical wall portions TW of a pair of movable side pedestal portions 2D in the neutral state of the lens driving device 101. Moreover, the respective front end surfaces FEF of the pair of stopper protrusions 18S may also constitute the second fixed side abutment portion FC2 of the second stopper ST2. In addition, the respective side surfaces SDF of the pair of stopper protrusions 18S may also constitute the third fixed side abutment portion FC3 of the third stopper ST3 that limits the movement of the lens holding component 2 in a direction intersecting the optical axis direction. Moreover, as Fig.12 As shown in the figure above, the elastic body portion 7 (first elastic body portion 7A) may also have a lower surface (top surface of the stopper recess CV, i.e., inner bottom surface IBF (refer to Fig.11 The top surface CW of the upper figure) and the inner peripheral surface IF provided on the cylindrical wall portion TW (refer to Fig.11 In this case, if Fig.12 As shown in the figure below, the top surface CW forms a second fixed side contact portion FC2 (refer to Fig. 9 ) The second movable side contact portion MC2 can be abutted against each other, and the inner peripheral surface SW constitutes a third fixed side contact portion FC3 (refer to Fig. 9 ) The third movable side abutting portion MC3 can be abutted against each other, and the second movable side abutting portion MC2 and the third movable side abutting portion MC3 can also be continuously formed as a whole.

[0155] With this configuration, the lens driving device 101 can reduce the sound generated when the third fixed side contact portion FC3 contacts the third movable side contact portion MC3 when the lens holding member 2 moves in a direction intersecting the optical axis direction (e.g., the X-axis direction or the Y-axis direction), when the lens holding member 2 rotates around the optical axis OA, or when the lens holding member 2 moves through these combinations. As a result, the lens driving device 101 can suppress the generation of abnormal noise.

[0156] In addition, if Fig.12 As shown in the following figure, the inner peripheral surface SW may also be provided in the entire area of ​​the inner peripheral surface IF of the cylindrical wall portion TW. Fig.12 As shown in the following figure, the inner peripheral surface portion SW may be configured to cover each of the six planes constituting the inner peripheral surface IF of the cylindrical wall portion TW.

[0157] This configuration has an effect that the elastic body portion 7 (first elastic body portion 7A) is less likely to be separated from the inner peripheral surface IF, compared with a case where the inner peripheral surface portion SW covers only a portion of the inner peripheral surface IF of the cylindrical wall portion TW.

[0158] In addition, if Fig.12 As shown, the lens holding member 2 may also have a pair of protruding portions 2S protruding outward from the cylindrical portion 12 at positions opposite to each other across the optical axis OA. In this case, the elastic body portion 7 (the second elastic body portion 7B) may also have a first movable side abutting portion MC1 (upper portion UP2) provided on the upper surface of the protruding portion 2S, a second movable side abutting portion MC2 (lower portion LP2) provided on the lower surface of the protruding portion 2S, and a second connecting portion CN2 provided on the side surface of the protruding portion 2S and connecting the first movable side abutting portion MC1 and the second movable side abutting portion MC2.

[0159] Compared with the structure in which the first movable side abutting portion MC1 and the second movable side abutting portion MC2 are separated, this structure has the effect of suppressing the elastic body portion 7 (the second elastic body portion 7B) from being separated from the lens holding member 2. In addition, this structure has the effect of facilitating the integration of the elastic body portion 7 (the second elastic body portion 7B) with respect to the lens holding member 2 by secondary molding.

[0160] In addition, if Fig. 9As shown in FIG. 1 , the base member 18 may also include a base portion 18B and a pair of outer wall portions (fixed side seat portions 18D) arranged to cover the outer sides of the pair of protruding portions 2S. In addition, the outer wall portion (fixed side seat portion 18D) may also constitute a fourth fixed side abutment portion FC4 of a fourth stopper portion ST4 that restricts the movement of the lens holding member 2 in a direction intersecting the optical axis direction (e.g., the X-axis direction or the Y-axis direction). In this case, as shown in FIG. Fig.12 As shown, the second connection portion CN2 of the second elastic body portion 7B may also be formed continuously with the outer side surface of the protruding portion 2S to form a fourth movable side contact portion MC4 that can contact and oppose the fourth fixed side contact portion FC4. Figure 3 As shown in the figure below, a fixed-side metal member 5F for fixing the other end of the shape memory alloy wire may be fixed to the outer side surface of the outer wall portion (fixed-side pedestal portion 18D).

[0161] With this configuration, the lens driving device 101 can reduce the sound generated when the fourth fixed side contact portion FC4 contacts the fourth movable side contact portion MC4 when the lens holding member 2 moves in a direction intersecting the optical axis direction (e.g., the X-axis direction or the Y-axis direction), when the lens holding member 2 rotates around the optical axis OA, or when the lens holding member 2 moves through these combinations. As a result, the lens driving device 101 can suppress the generation of abnormal noise.

[0162] In addition, if Fig. 9 As shown, the fixed side member FB may also include: a cover member 4 (upper cover member 4U) having an outer peripheral wall portion (first outer peripheral wall portion 4A) and a top plate portion 4B, and fixed to the base member 18 in a state where the lens holding member 2 is accommodated inside; and a synthetic resin spacer member 1, which is arranged between the lens holding member 2 and the top plate portion 4B and fixed to the cover member 4 (upper cover member 4U). In this case, the first fixed side contact portion FC1 of the first stopper ST1 may also be provided on the spacer member 1.

[0163] This structure has the effect of preventing the elastic body portion 7 functioning as the first movable side contact portion MC1 from directly contacting the cover member 4 (upper cover member 4U). Therefore, regardless of whether the cover member 4 (upper cover member 4U) is formed of metal or synthetic resin material, this structure has the effect of preventing problems caused by the cover member 4 (upper cover member 4U) and the elastic body portion 7 directly contacting each other.

[0164] In addition, the elastic body portion 7 may be integrated with the lens holding member 2 by secondary molding. Fig.17 As shown, the gate mark portion GM formed during the secondary molding may be located in the recessed portion RC in the movable-side contact portion MC.

[0165] The composition is as Fig.14 As shown in the right figure, when the lens holding component 2 moves upward from the neutral state by a specified distance DS2, the upper end of the gate mark portion GM, rather than the upper surface of the upper portion UP2 that functions as the first movable side abutment portion MC1 of the first stop portion ST1, contacts the top surface CLF of the spacing component 1 that functions as the first fixed side abutment portion FC1 of the first stop portion ST1, thereby preventing the maximum upward movement of the lens holding component 2 from decreasing.

[0166] 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 may be made 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 may be appropriately combined as long as they are not technically contradictory.

Claims

1. A lens driving device, comprising: a fixed side member, including a base member; a lens holding member having a cylindrical portion capable of holding a lens body; and a plurality of shape memory alloy wires, which move the lens holding member relative to the fixed side member, It is characterized in that The fixed side member has a fixed side abutment portion, and the fixed side abutment portion constitutes a stopper portion for restricting movement of the lens holding member. The lens holding member includes an elastic body portion formed of a material softer than a synthetic resin material constituting the cylindrical portion of the lens holding member. The elastic body portion has a movable side contact portion that faces and abuts against the fixed side contact portion of the stopper portion.

2. The lens driving device according to claim 1, wherein: The stopper has a first stopper that restricts movement of the lens holding member toward the object side and a second stopper that restricts movement of the lens holding member toward the imaging element side. The elastic body portion has a first movable side abutment portion and a second movable side abutment portion, wherein the first movable side abutment portion can abut against the first fixed side abutment portion of the first stop portion, and the second movable side abutment portion can abut against the second fixed side abutment portion of the second stop portion.

3. The lens driving device according to claim 2, wherein: The first movable side abutting portion and the second movable side abutting portion are continuously and integrally formed.

4. The lens driving device according to claim 3, wherein: The lens holding member has an upper wall portion having a through portion penetrating in the optical axis direction. The elastic body portion has a first connecting portion disposed on the through portion, The first movable side abutting portion and the second movable side abutting portion are connected via the first connecting portion. The first movable side contact portion is arranged in a state of contact with the upper surface of the upper wall portion, The second movable side contact portion is arranged in a state of contact with the lower surface of the upper wall portion. The width of the first connecting portion on a cross-section perpendicular to the optical axis is smaller than the width of the first movable-side abutting portion, and smaller than the width of the second movable-side abutting portion.

5. The lens driving device according to claim 4, characterized in that: The lens holding member has a pair of movable side seats, and the pair of movable side seats protrude outward from the cylindrical portion. The pair of movable side pedestal parts are arranged at positions facing each other across the optical axis. A movable side metal member for fixing one end of the shape memory alloy wire is fixed to each of the pair of movable side pedestal parts. The pair of movable side pedestal portions are each formed into a concave shape opened downward and having a cylindrical wall portion. The upper wall portion having the through portion is located at a position connecting the upper portion of the cylindrical wall portion. The base member has a base and a pair of stopper protrusions, the pair of stopper protrusions protruding upward from the base. The pair of stopper protrusions are arranged at positions opposite to each other across the optical axis. The pair of stopper protrusions are respectively arranged inside the cylindrical wall portions of the pair of movable side pedestal portions. The front end surfaces of the pair of stopper protrusions constitute the second fixed side abutment portion of the second stopper. The side surfaces of the pair of stopper protrusions constitute a third fixed-side abutment portion of a third stopper, and the third stopper restricts movement of the lens holding member in a direction intersecting the optical axis direction. The elastic body portion has a top surface portion and an inner peripheral surface portion, the top surface portion is provided on the lower surface of the upper wall portion, and the inner peripheral surface portion is provided on the inner peripheral surface of the cylindrical wall portion. The top surface portion constitutes the second movable side abutting portion, and the second movable side abutting portion and the second fixed side abutting portion are opposed to each other in abutting manner. The inner peripheral surface portion constitutes a third movable side abutting portion, and the third movable side abutting portion is opposed to the third fixed side abutting portion so as to abut against the third fixed side abutting portion. The second movable side abutting portion is formed integrally and continuously with the third movable side abutting portion.

6. The lens driving device according to claim 5, characterized in that: The inner peripheral surface portion is provided over the entire area of ​​the inner peripheral surface of the cylindrical wall portion.

7. The lens driving device according to claim 2, wherein: The lens holding member has a pair of protruding portions at positions facing each other across the optical axis, the pair of protruding portions protruding outward from the cylindrical portion. The elastic body portion comprises: the first movable side contact portion, which is provided on the upper surface of the protruding portion; The second movable side contact portion is provided on the lower surface of the protruding portion; and the second connecting portion is provided on the side surface of the protruding portion and connects the first movable side contact portion and the second movable side contact portion.

8. The lens driving device according to claim 7, wherein: The base member includes a base portion and a pair of outer wall portions, the pair of outer wall portions being arranged so as to cover the outer sides of the pair of protruding portions. The outer wall portion constitutes a fourth fixed-side abutment portion of a fourth stopper that restricts movement of the lens holding member in a direction intersecting the optical axis direction. The second connection portion is formed continuously with the outer side surface of the protruding portion, and constitutes a fourth movable side contact portion that is opposed to and abuts against the fourth fixed side contact portion.

9. The lens driving device according to any one of claims 2 to 8, characterized in that: The fixed side member includes: a cover member having an outer peripheral wall portion and a top plate portion and fixed to the base member in a state where the lens holding member is accommodated therein; and a synthetic resin spacer member disposed between the lens holding member and the top plate portion and fixed to the cover member. The first fixed-side abutting portion of the first stopper is provided on the spacing member.

10. The lens driving device according to any one of claims 1 to 8, characterized in that: The elastic body portion is integrated with the lens holding component by secondary molding, The gate trace portion formed during the secondary molding is located in the recessed portion of the movable-side abutment portion.

11. A camera module, characterized in that: have: The lens driving device according to any one of claims 1 to 10; the lens body; and The imaging element is opposite to the lens body.

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