Lens drive device and camera module

Abstract

To suppress an influence of a current flowing to a shape memory alloy wire for camera shake correction on an imaging element.SOLUTION: A lens drive device 101 includes: a fixed-side member FB; a lens holding member 2 having a cylindrical portion 12 capable of holding a lens body LS arranged to face an imaging element IS; a support member 3 that is movable to the fixed-side member FB in a direction crossing an optical axis direction of the lens body LS and is provided outside of the lens holding member 2; a first drive portion DM1 that moves the lens holding member 2 to the support member 3 in the optical axis direction; and a second drive portion DM2 configured to have a plurality of upper shape memory alloy wires SAU that move the support member 3 to the fixed-side member FB in the direction crossing the optical axis direction. The upper shape memory alloy wires SAU are arranged closer to a subject side than the first drive portion DM1.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] 2. Description of the Related Art Conventionally, there is known a lens driving device that realizes an automatic focus adjustment function using an electromagnetic driving mechanism and an image stabilization function using a shape memory alloy wire (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-018083 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned device, the shape memory alloy wire for image stabilization is arranged closer to the image sensor (image pickup element) than the electromagnetic drive mechanism for automatic focus adjustment. This arrangement may cause an electric field generated by the current flowing through the shape memory alloy wire to affect the image pickup element as image noise.

[0005] For this reason, it is desirable to suppress the influence of the current flowing through the shape memory alloy wire for image stabilization on the imaging element. [Means for solving the problem]

[0006] A lens driving device according to one embodiment of the present disclosure includes a fixed side member, a lens holding member having a cylindrical portion capable of holding a lens body arranged opposite an imaging element, a support member movable in a direction intersecting the optical axis direction of the lens body relative to the fixed side member and arranged on the outside of the lens holding member, a first driving unit that moves the lens holding member in the optical axis direction relative to the support member, and a second driving unit having a plurality of shape memory alloy wires that move the support member in a direction intersecting the optical axis direction relative to the fixed side member, wherein the shape memory alloy wires are arranged on the subject side of the first driving unit. Effect of the Invention

[0007] The above-described lens driving device can suppress the influence of the current flowing through the shape memory alloy wire for image stabilization on the imaging element. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a camera module according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is an exploded perspective view of a lens driving device according to an embodiment of the present disclosure. [Diagram 3] FIG. 2 is an exploded perspective view of a main body of the lens driving device according to an embodiment of the present disclosure. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 2 is a perspective view of a lens holding member. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] 13 is a diagram showing the layout of a movable metal member, a fixed metal member, and an upper shape memory alloy wire. FIG. [Figure 14] 13 is a diagram showing the layout of a lens side metal member, a support side metal member, and a lower shape memory alloy wire. FIG. [Figure 15] 1 is a top view of a movable metal member, a fixed metal member, an upper shape memory alloy wire, and a lens holding member. FIG. [Figure 16] 2 is a perspective view of a movable metal member, a fixed metal member, a flexible metal member, an upper conductive member, and an upper shape memory alloy wire. FIG. [Figure 17] 1 is a perspective view of a support side metal member, a lens side metal member, an upper conductive member, a lower conductive member, and a lower shape memory alloy wire. [Figure 18] FIG. 13 is a diagram showing an example of a path of a current flowing through a first lower wire. [Figure 19] FIG. 13 is a diagram showing an example of a path of a current flowing through a second lower wire. [Figure 20] FIG. 13 is a diagram showing an example of a path of a current flowing through a third lower wire. [Figure 21] FIG. 13 is a diagram showing an example of a path of a current flowing through a fourth lower wire. [Figure 22] FIG. 13 is a layout diagram of the lens holding member, the support side metal member, the lens side metal member, the guide member, the first magnetic member, the second magnetic member, the yoke, and the lower shape memory alloy wire. [Diagram 23] 13 is a front view of the lens holding member, the support member, the support side metal member, the lens side metal member, the guide member, the first magnetic member, the second magnetic member, and the lower shape memory alloy wire. FIG. [Figure 24] FIG. 4 is a bottom view of the support member with the magnet attached. [Diagram 25] FIG. 4 is a perspective cross-sectional view of a lower cover member and a support member. [Figure 26] FIG. 13 is an exploded perspective view of a lens driving device according to another embodiment of the present disclosure. [Figure 27] FIG. 13 is an exploded perspective view of a main body of a lens driving device according to another embodiment of the present disclosure. [Figure 28]2 is a perspective view of a movable metal member, a fixed metal member, a flexible metal member, an upper conductive member, and an upper shape memory alloy wire. FIG. [Figure 29] 1 is a perspective view of a support side metal member, a lens side metal member, an upper conductive member, a lower conductive member, and a lower shape memory alloy wire. [Diagram 30] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a lens driving device 101 and a camera module CM according to an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a perspective view of the camera module CM. Fig. 2 is an exploded perspective view of the lens driving device 101 constituting the camera module CM. Fig. 3 is an exploded perspective view of a main body unit MN constituting the lens driving device 101.

[0010] In FIG. 1, 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. Moreover, Y1 represents one direction of the Y axis constituting the three-dimensional orthogonal coordinate system, and Y2 represents the other direction of the Y axis. Similarly, Z1 represents one direction of the Z axis constituting the three-dimensional orthogonal coordinate system, and Z2 represents the other direction of the Z axis. In FIG. 1, the X1 side of the lens driving device 101 corresponds to the front side (front side) of the lens driving device 101, and the X2 side of the lens driving device 101 corresponds to the rear side (rear side) of the lens driving device 101. Moreover, the Y1 side of the lens driving device 101 corresponds to the left side of the lens driving device 101, and the Y2 side of the lens driving device 101 corresponds to the right side of the lens driving device 101. Moreover, 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 (imaging element side) of the lens driving device 101. The same applies to the other figures.

[0011] 1, the camera module CM includes a lens driving device 101, a lens body LS attached to a lens holding member 2, and an imaging element IS mounted on an external board (not shown) so as to face the lens body LS. The lens body LS is a cylindrical lens barrel including at least one lens and has an optical axis OA. In the illustrated example, the lens driving device 101 having a substantially rectangular parallelepiped outer shape is mounted on the external board on which the imaging element IS is mounted. The imaging element IS may be mounted on the lower surface of the lens driving device 101 via a sensor holder (not shown).

[0012] Specifically, the lens driving device 101 includes a cover member 4 as a fixed-side member FB, as shown in FIG. 1 and FIG. 2. The cover member 4 includes an upper cover member 4U and a lower cover member 4L. As shown in FIG. 2, the cover member 4 has a box-shaped outer shape that defines a storage section 4S. The cover member 4 is configured to function as a housing HS that covers each member. In this embodiment, the cover member 4 is made of a magnetic metal. Therefore, the cover member 4 also functions as an electromagnetic shield. In particular, the lower cover member 4L is configured to function as an electromagnetic field shield that suppresses the electric field generated by the lens driving device 101 from becoming image noise for the imaging element IS. In the illustrated example, the lower cover member 4L is made of a magnetic metal so as to constitute an outer biasing means EN described later, but the upper cover member 4U may be made of a non-magnetic metal.

[0013] In the illustrated example, the upper cover member 4U has a rectangular cylindrical first outer peripheral wall portion 4A and a rectangular annular flat top plate portion 4B provided so as to be continuous with the upper end (the 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 face each other, and the second side plate portion 4A2 and the fourth side plate portion 4A4 face each other. The first side plate portion 4A1 and the third side plate portion 4A3 extend perpendicularly to the second side plate portion 4A2 and the fourth side plate portion 4A4.

[0014] Similarly, as shown in Fig. 2, the lower cover member 4L has a rectangular cylindrical second outer peripheral wall portion 4C and a rectangular annular flat bottom plate portion 4D provided so as to be 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 face each other, and the second side plate portion 4C2 and the fourth side plate portion 4C4 face each other. The first side plate portion 4C1 and the third side plate portion 4C3 extend perpendicular to the second side plate portion 4C2 and the fourth side plate portion 4C4.

[0015] The upper cover member 4U is joined to the lower cover member 4L by an adhesive as shown in Fig. 1. Specifically, the first outer peripheral wall portion 4A is disposed so as to cover a part of the second outer peripheral wall portion 4C. Then, the main body portion MN is accommodated in the cover member 4 functioning as the housing HS as shown in Fig. 2.

[0016] 3, the main body MN includes a fixed support member 1, a lens holding member 2, a support member 3, a metal member 5, a flexible metal member 6, a guide member 7, a magnet 8, a first magnetic member 9, a second magnetic member 10, a yoke 11, a conductive member CN, and a shape memory alloy wire SA. In addition, the lens holding member 2 and the support member 3 constitute a movable member MB.

[0017] The fixing support member 1 is formed by injection molding using a synthetic resin such as liquid crystal polymer (LCP). In this embodiment, as shown in FIG. 3, the fixing support member 1 has a substantially rectangular outline in a plan view and has an opening 1K at the center. Specifically, the fixing support member 1 includes a substantially rectangular annular base 1B arranged to surround the circular opening 1K, and legs 1D formed to extend downward from the outer periphery of the base 1B. The legs 1D include a first leg 1D1 to a fourth leg 1D4. In the illustrated example, the first leg 1D1 and the second leg 1D2 are arranged to face each other in the X-axis direction across the optical axis OA. The third leg 1D3 and the fourth leg 1D4 are arranged to face each other in the Y-axis direction across the optical axis OA.

[0018] The lens holding member 2 is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP), and is configured to have an opening 2K penetrating in the vertical direction capable of holding the lens body LS. Specifically, as shown in Fig. 3, the lens holding member 2 includes a cylindrical portion 12 formed to extend along the optical axis OA, and a base portion 2D formed to protrude radially outward from the cylindrical portion 12. In the illustrated example, the lens body LS is configured to be fixed to the inner circumferential surface of the cylindrical portion 12 with an adhesive. A spiral groove may be formed on the inner circumferential surface of the cylindrical portion 12 so that the adhesive spreads between the inner circumferential surface of the cylindrical portion 12 and the lens body LS.

[0019] The base portion 2D includes a first base portion 2D1 and a second base portion 2D2. The first base portion 2D1 and the second base portion 2D2 are disposed so as to be located on opposite sides of the optical axis OA. A lens side metal member 5L is attached to each of the two base portions 2D.

[0020] The support member 3 is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP). In this embodiment, the support member 3 has a substantially rectangular outline in a plan view and has an opening 3K at the center. Specifically, the support member 3 is a substantially rectangular annular member disposed so as to surround a circular opening 3K, as shown in FIG.

[0021] The shape memory alloy wire SA is an example of a shape memory actuator, and constitutes a driving unit DM that drives the movable member MB. In the illustrated example, the shape memory alloy wire SA includes an upper shape memory alloy wire SAU and a lower shape memory alloy wire SAD. The upper shape memory alloy wire SAU includes a first upper wire SAU1 to a fourth upper wire SAU4, and the lower shape memory alloy wire SAD includes a first lower wire SAD1 to a fourth lower wire SAD4. When a current flows through the shape memory alloy wire SA, the temperature rises and the wire contracts in response to the rise in temperature. The driving unit DM can move the movable member MB by utilizing the contraction of the shape memory alloy wire SA. In the illustrated example, the driving unit DM includes a first driving unit DM1 that moves the lens holding member 2 in the optical axis direction relative to the support member 3, and a second driving unit DM2 that moves the support member 3 in a direction perpendicular to the optical axis direction relative to the fixed member FB. The optical axis direction includes the direction of the optical axis OA of the lens body LS and a direction parallel to the optical axis OA. The first driving part DM1 is constituted by a lower shape memory alloy wire SAD, and the second driving part DM2 is constituted by an upper shape memory alloy wire SAU.

[0022] The flexible metal member 6 constitutes a conductive connecting member that connects the fixed support member 1 and the support member 3. In this embodiment, the flexible metal member 6 is made of a metal plate whose main material is, for example, a copper alloy, a titanium-copper alloy (titanium-copper), or a copper-nickel alloy (nickel-tin-copper). The flexible metal member 6 may be configured to function as an elastic support member that can elastically support the support member 3 with respect to the fixed support member 1.

[0023] In the illustrated example, the flexible metal member 6 has a base fixing portion 6N fixed to the fixed support member 1, a support fixing portion 6E fixed to the support member 3, and a flexible arm portion 6G connecting the base fixing portion 6N and the support fixing portion 6E. The base fixing portion 6N includes a first base fixing portion 6N1 and a second base fixing portion 6N2, and the support fixing portion 6E includes a first support fixing portion 6E1, a second support fixing portion 6E2, and a third support fixing portion 6E3 that is substantially circular in a plan view. The flexible arm portion 6G includes a first flexible arm portion 6G1 connecting the first base fixing portion 6N1 and the third support fixing portion 6E3, and a second flexible arm portion 6G2 connecting the second base fixing portion 6N2 and the third support fixing portion 6E3.

[0024] The metal member 5 is configured to fix the end of the shape memory alloy wire SA. In this embodiment, the metal member 5 is formed of a non-magnetic metal and includes a support side metal member 5S as a first metal member, a lens side metal member 5L as a second metal member, a fixed side metal member 5F as a third metal member, and a movable side metal member 5M as a fourth metal member. The support side metal member 5S is configured to be fixed to the side surface of the support member 3, the lens side metal member 5L is configured to be fixed to the pedestal portion 2D of the lens holding member 2, the fixed side metal member 5F is configured to be fixed to the upper surface of the fixed support member 1, and the movable side metal member 5M is configured to be fixed to the upper surface of the support member 3.

[0025] More specifically, the support side metal member 5S is also referred to as a support side terminal plate and includes a first support side terminal plate 5S1 to a fourth support side terminal plate 5S4. The lens side metal member 5L is also referred to as a lens side terminal plate and includes a first lens side terminal plate 5L1 and a second lens side terminal plate 5L2. The fixed side metal member 5F is also referred to as a fixed side terminal plate and includes a first fixed side terminal plate 5F1 to a fourth fixed side terminal plate 5F4. The movable side metal member 5M is also referred to as a movable side terminal plate and includes a first movable side terminal plate 5M1 to a fourth movable side terminal plate 5M4.

[0026] Each of the first lower wire SAD1 to the fourth lower wire SAD4 has one end fixed to the support side metal member 5S by crimping, welding, etc., and the other end fixed to the lens side metal member 5L by crimping, welding, etc. Each of the first lower wire SAD1 to the fourth lower wire SAD4 is arranged so as to be stretched straight along the inner surface of the second outer circumferential wall portion 4C of the lower cover member 4L when a current flows therethrough, and is configured to support the lens holding member 2 movably in the optical axis direction relative to the support member 3.

[0027] Each of the first upper wire SAU1 to the fourth upper wire SAU4 has one end fixed to the fixed metal member 5F by crimping, welding, etc., and the other end fixed to the movable metal member 5M by crimping, welding, etc. Each of the first upper wire SAU1 to the fourth upper wire SAU4 is arranged so as to be stretched straight along the lower surface of the top plate portion 4B of the upper cover member 4U when a current flows therethrough, and is configured to support the support member 3 movably in a direction perpendicular to the optical axis OA relative to the fixed support member 1.

[0028] The guide member 7 is an example of an inner guide portion IG that is a guide portion that guides the movement of the lens holding member 2 in the optical axis direction, and is attached to the support member 3. The "inner" of the inner guide portion IG means that the guide portion is arranged in a position inside the outer guide portion EG (a position closer to the center of the lens driving device 101) described later in the lens driving device 101. However, the inner guide portion IG may be arranged outside the outer guide portion EG. In the illustrated example, the guide member 7 is formed of metal and includes a substantially cylindrical portion including a semicylindrical upper half portion and a cylindrical lower half portion. The guide member 7 also includes a rear guide member 7B attached to the left rear portion of the support member 3, and a front guide member 7F attached to the right front portion of the support member 3. The guide member 7 may include one or more substantially hemispherical portions instead of the substantially cylindrical portion. The guide member 7 may also be formed of synthetic resin. In this case, the guide member 7 may be integrated with the support member 3 formed of synthetic resin.

[0029] The lens holding member 2 has a groove 2V that receives a guide member 7. The groove 2V constitutes an inner guided portion IGD that is guided by the guide member 7 as an inner guide portion IG. Specifically, the guide member 7 fixed to the support member 3 constitutes the inner guide portion IG that guides the lens holding member 2 attempting to move in the optical axis direction, and the groove 2V formed in the lens holding member 2 that receives the guide member 7 constitutes the inner guided portion IGD that is guided by the inner guide portion IG. In the illustrated example, the groove 2V includes a rear groove portion 2VB formed in the left rear portion of the lens holding member 2 and a front groove portion 2VF formed in the right front portion of the lens holding member 2.

[0030] The magnet 8 is an example of a member constituting the outer biasing means EN as a biasing means for applying a force that attracts the fixed side member FB and the support member 3 to each other, and is attached to the support member 3. The "outside" in the outer biasing means EN means that the outer biasing means EN is disposed outside (at a position farther from the center of the lens driving device 101) than the inner biasing means IN described later in the lens driving device 101. However, the outer biasing means EN may be disposed inside the inner biasing means IN. In the illustrated example, the magnet 8 is a bipolar magnetized magnet having a substantially rectangular parallelepiped shape, and constitutes the outer biasing means EN that cooperates with the bottom plate portion 4D of the lower cover member 4L formed of a magnetic metal to apply a force that attracts the fixed side member FB and the support member 3 to each other. That is, the outer biasing means EN uses a magnetic force (attractive force) that acts between the magnet 8 fixed to the support member 3 and the bottom plate portion 4D of the lower cover member 4L as the fixed side member FB to generate a force that attracts the fixed side member FB and the support member 3 to each other. In this case, the bottom plate portion 4D of the lower cover member 4L constitutes an outer guiding portion EG that guides the support member 3 attempting to move in a direction perpendicular to the optical axis direction, and a part of the support member 3 (a protruding portion 3S described below) constitutes an outer guided portion EGD guided by the outer guiding portion EG. The magnet 8 includes a rear magnet 8B attached to the right rear portion of the support member 3 and a front magnet 8F attached to the left front portion of the support member 3.

[0031] The first magnetic member 9 is an example of a member constituting the inner biasing means IN, which is a biasing means for applying a force that pushes or attracts the lens holding member 2 and the support member 3 against each other, and is attached to the support member 3. In the illustrated example, the first magnetic member 9 is a bipolar magnetized hexagonal prism-shaped (approximately semi-octagonal prism-shaped) magnet (see the center diagram of FIG. 12), and constitutes the inner biasing means IN that cooperates with the second magnetic member 10 to apply a force that attracts the support member 3 and the lens holding member 2 against each other. That is, the inner biasing means IN uses a magnetic force (attractive force) acting between the first magnetic member 9 fixed to the support member 3 and the second magnetic member 10 fixed to the lens holding member 2 to generate a force that attracts the support member 3 and the lens holding member 2 against each other. The first magnetic member 9 also includes a first rear magnetic member 9B attached to the left rear part of the support member 3, and a first front magnetic member 9F (see the center diagram of FIG. 12) attached to the right front part of the support member 3.

[0032] The second magnetic member 10 is another example of a member constituting the inward biasing means IN, and is attached to the lens holding member 2. In the illustrated example, the second magnetic member 10 is a bipolar magnetized magnet having a substantially rectangular parallelepiped shape, and constitutes the inward biasing means IN in cooperation with the first magnetic member 9. The second magnetic member 10 is fixed to the lens holding member 2 so as to face the first magnetic member 9 attached to the support member 3 with a small gap therebetween. The second magnetic member 10 also includes a second rear magnetic member 10B (see the lower diagram in FIG. 8) attached to the left rear portion of the lens holding member 2, and a second front magnetic member 10F attached to the right front portion of the lens holding member 2.

[0033] The yoke 11 is a member that controls the path of the magnetic lines of force generated by the second magnetic member 10, and is attached to the lens holding member 2 together with the second magnetic member 10. In the illustrated example, as shown in FIG. 7, the yoke 11 has a substantially U-shape that covers a part of the substantially rectangular parallelepiped second magnetic member 10. The yoke 11 also includes a rear yoke 11B attached to the left rear part of the lens holding member 2, and a front yoke 11F attached to the right front part of the lens holding member 2. The yoke 11 may be omitted.

[0034] In the illustrated example, both the first magnetic member 9 and the second magnetic member 10 are magnets, but in order to configure the inner biasing means IN, it is sufficient that at least one of them is a magnet. This is because a magnetic attractive force can be generated between the first magnetic member 9 and the second magnetic member 10. In addition, in the illustrated example, the first magnetic member 9 and the second magnetic member 10 are arranged so that a magnetic attractive force can be generated between the first magnetic member 9 and the second magnetic member 10, but they may be arranged so that a magnetic repulsive force (repulsive force) can be generated between the first magnetic member 9 and the second magnetic member 10.

[0035] The conductive member CN is a member for conducting electricity, and is formed of a magnetic metal such as iron or a non-magnetic metal such as a copper alloy. In the illustrated example, the conductive member CN includes an upper conductive member CU and a lower conductive member CD, as shown in FIG. 3. The upper conductive member CU is a conductive member embedded in the fixed support member 1. The lower conductive member CD is a conductive member attached to the lower surfaces of the fixed support member 1, the lens holding member 2, and the support member 3.

[0036] Next, the fixed support member 1 as the fixed side member FB will be described in detail with reference to Figs. 4 to 6. Fig. 4 is a perspective view of the fixed support member 1 in which the upper conductive member CU is embedded and the fixed side metal member 5F and the lower conductive member CD are attached. Specifically, the upper view of Fig. 4 (above the block arrow) is a perspective view of the fixed side metal member 5F, the fixed support member 1, the upper conductive member CU, and the lower conductive member CD, and the lower view of Fig. 4 (below the block arrow) is a perspective view of the fixed support member 1 in which the upper conductive member CU is embedded and the fixed side metal member 5F and the lower conductive member CD are attached. Note that the flexible metal member 6 is also attached to the fixed support member 1, but the flexible metal member 6 is omitted from Fig. 4 for clarity. Fig. 5 is a top view of the fixed support member 1 in which the upper conductive member CU is embedded. Specifically, the upper view of FIG. 5 is a top view of the fixed support member 1 in a state where the fixed metal member 5F is not attached, and the lower view of FIG. 5 is a top view of the fixed support member 1 in a state where the fixed metal member 5F is attached. FIG. 6 is a bottom view of the fixed support member 1 in which the upper conductive member CU is embedded. Specifically, the upper view of FIG. 6 is a bottom view of the fixed support member 1 in a state where the flexible metal member 6 and the lower conductive member CD are not attached, the center view of FIG. 6 is a bottom view of the fixed support member 1 in a state where the flexible metal member 6 is attached, and the lower view of FIG. 6 is a bottom view of the fixed support member 1 in a state where the lower conductive member CD is further attached. For clarity, a dot pattern is applied to the upper conductive member CU in the upper view of FIG. 5, and a dot pattern is applied to the fixed metal member 5F in the lower view of FIG. 5. In addition, in the upper diagram of Figure 6, a dot pattern is applied to the upper conductive member CU, in the central diagram of Figure 6, a dot pattern is applied to the flexible metal member 6, and in the lower diagram of Figure 6, a dot pattern is applied to the lower conductive member CD.

[0037] As shown in Fig. 4, the upper conductive member CU is embedded in the fixed support member 1 by insert molding. In this embodiment, the upper conductive member CU includes a first upper conductive member CU1 to a tenth upper conductive member CU10. Specifically, the upper conductive member CU has a joint surface portion CS exposed on the surface of the fixed support member 1, an external terminal portion TM exposed from a lower portion of a leg portion 1D of the fixed support member 1 and extending downward, and a wiring portion RT provided between the joint surface portion CS and the external terminal portion TM and embedded inside the fixed support member 1. More specifically, the first upper conductive member CU1 to the tenth upper conductive member CU10 have the first joint surface portion CS1 to the tenth joint surface portion CS10, the first external terminal portion TM1 to the tenth external terminal portion TM10, and the first wiring portion RT1 to the tenth wiring portion RT10, respectively. 4, for the sake of clarity, the higher-level reference symbols "CS", "RT", and "TM" are added before the reference symbols "CS10", "RT10", and "TM10" only for the tenth upper conductive member CU10. Also, the reference symbols "RT1" to "RT9" are omitted from the illustration.

[0038] The lower conductive members CD are conductive members attached to the lower surface of the fixed support member 1, and include a first lower conductive member CD1 to a fifth lower conductive member CD5.

[0039] In the illustrated example, the fixed-side metal member 5F is fixed to the upper surface of the fixed support member 1, as shown in the lower diagram of Fig. 5. Specifically, the first bonding surface portion CS1 to the fourth bonding surface portion CS4 are exposed on the upper surface of the base portion 1B of the fixed support member 1, as shown in the upper diagram of Fig. 5.

[0040] More specifically, each of the fixed metal members 5F has two first through holes 5H1 through which two cylindrical protrusions 1P formed to protrude upward from the upper surface of the base 1B of the fixed support member 1 are inserted, as shown in Fig. 5. In the illustrated example, the fixed support member 1 and each of the fixed metal members 5F are joined by hot crimping or cold crimping the two protrusions 1P inserted into the two first through holes 5H1. However, the fixed support member 1 and the fixed metal member 5F may also be joined by an adhesive.

[0041] Further, as shown in the lower diagram of Fig. 5, each of the fixed metal members 5F has a second through hole 5H2 formed in the center. The second through hole 5H2 is used when joining each of the fixed metal members 5F to the joining surface portion CS of the upper conductive member CU. In the illustrated example, the joining between each of the fixed metal members 5F and the upper conductive member CU is realized by laser welding. However, the joining between each of the fixed metal members 5F and the upper conductive member CU may also be realized by solder or a conductive adhesive.

[0042] More specifically, the first fixed side terminal plate 5F1 to the fourth fixed side terminal plate 5F4 are respectively placed on and joined to the base 1B, and are joined by laser welding to the first joint surface portion CS1 to the fourth joint surface portion CS4 exposed on the upper surface of the base 1B.

[0043] As shown in the center diagram of FIG. 6, the first through hole 6H1 and the second through hole 6H2 are formed in each of the first base fixing portion 6N1 and the second base fixing portion 6N2 of the flexible metal member 6. The first through hole 6H1 is used when joining the base fixing portion 6N and the fixed support member 1. In the illustrated example, the joining of the base fixing portion 6N and the fixed support member 1 is realized by hot crimping or cold crimping the protruding portion 1Q inserted into the first through hole 6H1. In the illustrated example, the protruding portion 1Q is a cylindrical portion formed so as to protrude downward from the lower surface of the base portion 1B of the fixed support member 1 as shown in the upper diagram of FIG. 6. However, the joining of the base fixing portion 6N and the fixed support member 1 may be realized by an adhesive. The second through hole 6H2 is used when joining the base fixing portion 6N and the upper conductive member CU embedded in the fixed support member 1. In the illustrated example, the connection between the base fixing portion 6N and the upper conductive member CU is realized by laser welding. The connection between the base fixing portion 6N and the upper conductive member CU may also be realized by solder or a conductive adhesive.

[0044] Specifically, as shown in Fig. 6, the first and second foundation fixing parts 6N1 and 6N2 are joined to the fixed support member 1 by hot or cold crimping the protrusions 1Q inserted into the first through holes 6H1. The first foundation fixing part 6N1 is joined (welded) to the fifth joint surface CS5 of the fifth upper conductive member CU5 by irradiating the second through hole 6H2 with a laser. The second through hole 6H2 formed in the second foundation fixing part 6N2 is not joined to the upper conductive member CU.

[0045] As shown in the lower diagram of FIG. 6, each of the lower conductive members CD (first lower conductive member CD1 to fifth lower conductive member CD5) has a first through hole H1 and a second through hole H2. The first through hole H1 is used when joining the lower conductive member CD and the fixed support member 1. In the illustrated example, the joining of the lower conductive member CD and the fixed support member 1 is realized by hot crimping or cold crimping the protrusion 1R inserted into the first through hole H1. In the illustrated example, the protrusion 1R is a cylindrical part formed so as to protrude downward from the lower surface of the leg portion 1D of the fixed support member 1 as shown in the upper diagram of FIG. 6. However, the joining of the lower conductive member CD and the fixed support member 1 may be realized by an adhesive. The second through hole H2 is used when joining the lower conductive member CD and the upper conductive member CU embedded in the fixed support member 1. In the illustrated example, the lower conductive member CD and the upper conductive member CU are joined by laser welding. The lower conductive member CD and the upper conductive member CU may be joined by solder or a conductive adhesive.

[0046] Specifically, as shown in Fig. 6, the first lower conductive member CD1 to the fifth lower conductive member CD5 are joined to the fixed support member 1 by hot or cold crimping the protrusion 1R inserted into the first through hole H1. The first lower conductive member CD1 is joined (welded) to the sixth joint surface CS6 of the sixth upper conductive member CU6 by irradiating the second through hole H2 with a laser. The same applies to the joint (welded) between the second lower conductive member CD2 and the seventh joint surface CS7 of the seventh upper conductive member CU7, the joint (welded) between the third lower conductive member CD3 and the eighth joint surface CS8 of the eighth upper conductive member CU8, the joint (welded) between the fourth lower conductive member CD4 and the ninth joint surface CS9 of the ninth upper conductive member CU9, and the joint (welded) between the fifth lower conductive member CD5 and the tenth joint surface CS10 of the tenth upper conductive member CU10.

[0047] Next, the lens holding member 2 as the movable member MB will be described in detail with reference to Figs. 7 to 9. Fig. 7 is a perspective view of the lens holding member 2 to which the lens side metal member 5L, the second magnetic member 10, the yoke 11, and the fifth lower conductive member CD5 are attached. Specifically, the upper view of Fig. 7 (above the block arrow) is a perspective view of the lens holding member 2, the lens side metal member 5L, the second magnetic member 10, the yoke 11, and the fifth lower conductive member CD5, and the lower view of Fig. 7 (below the block arrow) is a perspective view of the lens holding member 2 to which the lens side metal member 5L, the second magnetic member 10, the yoke 11, and the fifth lower conductive member CD5 are attached. Fig. 8 is a top view of the lens holding member 2. Specifically, the upper view of Fig. 8 is a top view of the lens holding member 2 in a state where no other members are attached, and the lower view of Fig. 8 is a top view of the lens holding member 2 in a state where the lens side metal member 5L, the second magnetic member 10, and the yoke 11 are attached. Fig. 9 is a bottom view of the lens holding member 2. Specifically, the upper view of Fig. 9 is a bottom view of the lens holding member 2 in a state where no other members are attached, the center view of Fig. 9 is a bottom view of the lens holding member 2 in a state where the lens side metal member 5L is attached, and the lower view of Fig. 9 is a bottom view of the lens holding member 2 in a state where the fifth lower conductive member CD5 is further attached. For clarity, in the lower view of Fig. 8, dot patterns are applied to the lens side metal member 5L, the second magnetic member 10, and the yoke 11, in the center view of Fig. 9, dot patterns are applied to the lens side metal member 5L, and in the lower view of Fig. 9, dot patterns are applied to the lens side metal member 5L and the fifth lower conductive member CD5.

[0048] As shown in Fig. 7, a side surface to which the lens side metal member 5L is attached is formed on the base portion 2D of the lens holding member 2. In the illustrated example, as shown in the lower diagram of Fig. 8, the first lens side terminal plate 5L1 is fixed to the front surface of the first base portion 2D1, and the second lens side terminal plate 5L2 is fixed to the rear surface of the second base portion 2D2.

[0049] Specifically, the lens holding member 2 and the lens side metal member 5L are joined by applying an adhesive to a convex portion (not shown) (a convex portion formed on a side surface of the base portion 2D) inserted into the third through hole 5H3. However, the lens holding member 2 and the lens side metal member 5L may be joined by other methods. For example, the lens side metal member 5L may be adhesively fixed to a side surface of the base portion 2D on which no convex portion is formed.

[0050] Further, the pedestal portion 2D of the lens holding member 2 is formed with a recess 2R for receiving the second magnetic member 10 and the yoke 11. In the illustrated example, as shown in the upper diagram of FIG. 8, the recess 2R includes a first recess 2R1 formed at the right end of the first pedestal portion 2D1 for receiving the second front magnetic member 10F and the front yoke 11F, and a second recess 2R2 formed at the left end of the second pedestal portion 2D2 for receiving the second rear magnetic member 10B and the rear yoke 11B. Each of the first recess 2R1 and the second recess 2R2 has a wide portion WP for receiving the yoke 11 attached to the second magnetic member 10 by adhesive, and a narrow portion NP for receiving only the second magnetic member 10. The narrow portion NP of the first recess 2R1 constitutes a mechanism for preventing the second front magnetic member 10F and the front yoke 11F, which are attracted to the right by the first front magnetic member 9F, from falling off to the right. Similarly, the narrow portion NP of the second recess 2R2 forms a retaining mechanism that prevents the second rear magnetic member 10B and the rear yoke 11B, which are attracted to the left by the first rear magnetic member 9B, from falling off to the left.

[0051] Further, the lens side metal member 5L has a bonding surface portion CT formed thereon, as shown in the center diagram of Fig. 9. The bonding surface portion CT is used when bonding the lens side metal member 5L and the fifth lower conductive member CD5. Specifically, the first lens side terminal plate 5L1 has a first bonding surface portion CT1, and the second lens side terminal plate 5L2 has a second bonding surface portion CT2.

[0052] Also, the fifth lower conductive member CD5 has a third through hole H3 and a fourth through hole H4 formed therein, as shown in the lower diagram of FIG. 9. The third through hole H3 is used when joining the fifth lower conductive member CD5 and the lens holding member 2. In the illustrated example, the joining of the fifth lower conductive member CD5 and the lens holding member 2 is realized by hot crimping or cold crimping the convex portion 2P inserted into the third through hole H3. In the illustrated example, the convex portion 2P is a cylindrical portion formed so as to protrude downward from the lower surface of the cylindrical portion 12 of the lens holding member 2, as shown in the upper diagram of FIG. 9. However, the joining of the fifth lower conductive member CD5 and the lens holding member 2 may be realized by an adhesive.

[0053] The fourth through hole H4 is used when joining the fifth lower conductive member CD5 and the lens side metal member 5L. In the illustrated example, the joining of the fifth lower conductive member CD5 and the lens side metal member 5L is realized by laser welding. However, the joining of the fifth lower conductive member CD5 and the lens side metal member 5L may also be realized by solder or a conductive adhesive.

[0054] 9, the joining (welding) between the fifth lower conductive member CD5 and the first bonding surface portion CT1 of the first lens side terminal plate 5L1 is achieved by irradiating the fourth through hole H4 with a laser. The joining (welding) between the fifth lower conductive member CD5 and the second bonding surface portion CT2 of the second lens side terminal plate 5L2 is achieved in the same manner.

[0055] Next, the support member 3 as the movable side member MB will be described in detail with reference to Figs. 10 to 12. Fig. 10 is a perspective view of the support member 3 to which the movable side metal member 5M, the support side metal member 5S, the flexible metal member 6, the guide member 7, the magnet 8, the first magnetic member 9, and the lower conductive member CD are attached. Specifically, the upper view of Fig. 10 (above the block arrow) is a perspective view of the support member 3, the movable side metal member 5M, the support side metal member 5S, the flexible metal member 6, the guide member 7, the magnet 8, the first magnetic member 9, and the lower conductive member CD, and the lower view of Fig. 10 (below the block arrow) is a perspective view of the support member 3 to which the movable side metal member 5M, the support side metal member 5S, the flexible metal member 6, the guide member 7, the magnet 8, the first magnetic member 9, and the lower conductive member CD are attached. Fig. 11 is a top view of the support member 3. Specifically, the upper view of Fig. 11 is a top view of the support member 3 in a state where no other members are attached, the central view of Fig. 11 is a top view of the support member 3 in a state where the flexible metal member 6 is attached, and the lower view of Fig. 11 is a top view of the support member 3 in a state where the movable side metal member 5M, the support side metal member 5S, and the guide member 7 are further attached. Fig. 12 is a bottom view of the support member 3. Specifically, the upper view of Fig. 12 is a bottom view of the support member 3 in a state where no other members are attached, the central view of Fig. 12 is a bottom view of the support member 3 in a state where the support side metal member 5S, the guide member 7, the magnet 8, and the first magnetic member 9 are attached, and the lower view of Fig. 12 is a bottom view of the support member 3 in a state where the lower conductive member CD is further attached. For clarity, in the central diagram of Figure 11, a dot pattern is applied to the flexible metal member 6, in the lower diagram of Figure 11, dot patterns are applied to the movable side metal member 5M, the support side metal member 5S, and the guide member 7, in the central diagram of Figure 12, dot patterns are applied to the support side metal member 5S, the guide member 7, the magnet 8, and the first magnetic member 9, and in the lower diagram of Figure 12, a dot pattern is applied to the lower conductive member CD.

[0056] As shown in the center diagram of FIG. 11, a third through hole 6H3 is formed in the third support fixing portion 6E3 of the support fixing portion 6E of the flexible metal member 6. The third through hole 6H3 is used when joining the third support fixing portion 6E3 and the support member 3. In the illustrated example, the joining of the third support fixing portion 6E3 and the support member 3 is realized by hot crimping or cold crimping the protrusion 3Q inserted into the third through hole 6H3. In the illustrated example, the protrusion 3Q is a cylindrical portion formed to protrude upward from the upper surface of the support member 3 as shown in the upper diagram of FIG. 11. However, the joining of the third support fixing portion 6E3 and the support member 3 may be realized by an adhesive.

[0057] As shown in the center diagram of FIG. 11, the first support fixing portion 6E1 and the second support fixing portion 6E2 of the flexible metal member 6 are each formed with two first through holes 6H1 through which two cylindrical protrusions 3P formed to protrude upward from the upper surface of the support member 3 are inserted. Also, as shown in the lower diagram of FIG. 11, the movable side metal member 5M is each formed with two first through holes 5H1 through which the two protrusions 3P are inserted. In the illustrated example, the joining of the support member 3, the movable side metal member 5M, and the support fixing portion 6E is realized by applying hot crimping or cold crimping to the protrusions 3P inserted into the first through holes 5H1 and the first through holes 6H1. However, the joining of the support member 3, the movable side metal member 5M, and the support fixing portion 6E may be realized by an adhesive.

[0058] 11, the first support fixing portion 6E1, the first movable side terminal plate 5M1, the second movable side terminal plate 5M2, and the support member 3 are joined by applying hot crimping or cold crimping to the protrusions 3P inserted into the first through holes 5H1 and 6H1, respectively. Similarly, the second support fixing portion 6E2, the third movable side terminal plate 5M3, and the fourth movable side terminal plate 5M4 are joined by applying hot crimping or cold crimping to the protrusions 3P inserted into the first through holes 5H1 and 6H1, respectively.

[0059] Further, as shown in the lower diagram of Fig. 11, each of the movable metal members 5M has a second through hole 5H2 formed in the center. The second through hole 5H2 is used when joining the movable metal member 5M and the supporting and fixing portion 6E of the flexible metal member 6. In the illustrated example, the joining (laser welding) between the movable metal member 5M and the supporting and fixing portion 6E is achieved by irradiating a laser into the second through hole 5H2. However, the joining (laser welding) between the movable metal member 5M and the supporting and fixing portion 6E may also be achieved by solder or a conductive adhesive.

[0060] More specifically, the joining (laser welding) between each of the first movable side terminal plate 5M1 and the second movable side terminal plate 5M2 and the first support fixing portion 6E1 is realized by irradiating the second through hole 5H2 with a laser. The joining (laser welding) between each of the third movable side terminal plate 5M3 and the fourth movable side terminal plate 5M4 and the second support fixing portion 6E2 is also realized in the same manner.

[0061] 12, the bottom surface of the support member 3 is formed with a groove 3T for receiving the guide member 7, a recess 3U for receiving the magnet 8, and a recess 3W for receiving the first magnetic member 9. In the illustrated example, as shown in the upper diagram of FIG. 12, the groove 3T includes a first groove 3T1 formed in the right front part of the support member 3 for receiving the front guide member 7F, and a second groove 3T2 formed in the left rear part of the support member 3 for receiving the rear guide member 7B. The recess 3U includes a first recess 3U1 formed in the left front part of the support member 3 for receiving the front magnet 8F, and a second recess 3U2 formed in the right rear part of the support member 3 for receiving the rear magnet 8B. The recess 3W includes a first recess 3W1 formed in the right front part of the support member 3 for receiving the first front magnetic member 9F, and a second recess 3W2 formed in the left rear part of the support member 3 for receiving the first rear magnetic member 9B. Each of the first recess 3W1 and the second recess 3W2 has a wide portion WP and a narrow portion NP for receiving the first magnetic member 9 having a hexagonal prism shape (approximately a semi-octagonal prism shape). The narrow portion NP of the first recess 3W1 constitutes a retaining mechanism that prevents the first front magnetic member 9F, which is attracted to the left by the second front magnetic member 10F (see the lower diagram of FIG. 8), from falling off to the left. Similarly, the narrow portion NP of the second recess 3W2 constitutes a retaining mechanism that prevents the first rear magnetic member 9B, which is attracted to the right by the second rear magnetic member 10B (see the lower diagram of FIG. 8), from falling off to the right. The guide member 7, the magnet 8, and the first magnetic member 9 are fixed to the support member 3 by adhesive.

[0062] Further, the lower conductive member CD has a fifth through hole H5 and a sixth through hole H6 formed therein, as shown in the lower diagram of FIG. 12. The fifth through hole H5 is used when joining the lower conductive member CD and the support member 3. In the illustrated example, the joining of the lower conductive member CD and the support member 3 is realized by hot crimping or cold crimping the protrusion 3R inserted into the fifth through hole H5. In the illustrated example, the protrusion 3R is a cylindrical portion formed so as to protrude downward from the lower surface of the support member 3, as shown in the upper diagram of FIG. 12. However, the joining of the lower conductive member CD and the support member 3 may be realized by an adhesive.

[0063] The sixth through hole H6 is used when joining the lower conductive member CD and the supporting metal member 5S. In the illustrated example, the joining (laser welding) between the lower conductive member CD and the supporting metal member 5S is realized by irradiating the sixth through hole H6 with a laser. However, the joining between the lower conductive member CD and the supporting metal member 5S may also be realized by solder or a conductive adhesive.

[0064] 12, the joining (welding) of the first lower conductive member CD1 and the first support side terminal plate 5S1 is achieved by irradiating the sixth through hole H6 with a laser. The same applies to the joining (welding) of the second lower conductive member CD2 and the second support side terminal plate 5S2, the joining (welding) of the third lower conductive member CD3 and the third support side terminal plate 5S3, and the joining (welding) of the fourth lower conductive member CD4 and the fourth support side terminal plate 5S4.

[0065] Next, referring to FIG. 13, the upper shape memory alloy wire SAU attached to the metal member 5 will be described. FIG. 13 is a diagram showing an example of the arrangement of the first movable terminal plate 5M1, the first fixed terminal plate 5F1, and the first upper wire SAU1. Specifically, the upper diagram of FIG. 13 is a diagram showing the first upper wire SAU1 attached to the first movable terminal plate 5M1 and the first fixed terminal plate 5F1, respectively, as viewed from the top (Z1 side), and the lower diagram of FIG. 13 is a diagram showing the first upper wire SAU1 attached to the first movable terminal plate 5M1 and the first fixed terminal plate 5F1, respectively, as viewed from the front (X1 side). Note that the positional relationship of each member shown in FIG. 13 corresponds to the positional relationship when the lens driving device 101 is assembled and a current is supplied to the upper shape memory alloy wire SAU. In FIG. 13, other members are omitted from the illustration for clarity. Moreover, the following description with reference to FIG. 13 relates to the first upper wire SAU1, but can be similarly applied to the second upper wire SAU2 to the fourth upper wire SAU4.

[0066] Specifically, one end of the first upper wire SAU1 is fixed to the first fixed side terminal plate 5F1 at the retaining portion J1 of the first fixed side terminal plate 5F1, and the other end of the first upper wire SAU1 is fixed to the first movable side terminal plate 5M1 at the retaining portion J2 of the first movable side terminal plate 5M1.

[0067] The holding portion J1 is formed by bending a part of the first fixed side terminal plate 5F1. Specifically, the part of the first fixed side terminal plate 5F1 is bent while sandwiching an end (one end) of the first upper wire SAU1, thereby forming the holding portion J1. The end (one end) of the first upper wire SAU1 is fixed to the holding portion J1 by welding. The same applies to the holding portion J2.

[0068] In this way, one end of the first upper wire SAU1 to the fourth upper wire SAU4 is fixed to the first fixed terminal plate 5F1 to the fourth fixed terminal plate 5F4, respectively, and the other end of the first upper wire SAU1 to the fourth upper wire SAU4 is fixed to the first movable terminal plate 5M1 to the fourth movable terminal plate 5M4, respectively. The fixed support member 1 to which the first fixed terminal plate 5F1 to the fourth fixed terminal plate 5F4 are attached is configured to function as a wire support member, and the support member 3 to which the first movable terminal plate 5M1 to the fourth movable terminal plate 5M4 are attached is configured to function as a movable member MB. With this configuration, the support member 3 is supported by the first upper wire SAU1 to the fourth upper wire SAU4 and the fixed support member 1 in a state where it can move at least in the X-axis direction and the Y-axis direction, which are directions perpendicular to the optical axis OA.

[0069] Next, the lower shape memory alloy wire SAD attached to the metal member 5 will be described with reference to Fig. 14. Fig. 14 is a diagram showing an example of arrangement of the first lens side terminal plate 5L1, the first support side terminal plate 5S1, the second support side terminal plate 5S2, the first lower wire SAD1, and the second lower wire SAD2. Specifically, the upper diagram of Fig. 14 is a diagram of the first lower wire SAD1 attached to the first lens side terminal plate 5L1 and the first support side terminal plate 5S1, respectively, and the second lower wire SAD2 attached to the first lens side terminal plate 5L1 and the second support side terminal plate 5S2, respectively, as viewed from the upper side (Z1 side), and the lower diagram of Fig. 14 is a diagram of the first lower wire SAD1 attached to the first lens side terminal plate 5L1 and the first support side terminal plate 5S1, respectively, and the second lower wire SAD2 attached to the first lens side terminal plate 5L1 and the second support side terminal plate 5S2, respectively, as viewed from the front side (X1 side). Note that the positional relationship of each member shown in Fig. 14 corresponds to the positional relationship when the lens driving device 101 is assembled and a current is supplied to the lower shape memory alloy wire SAD. In Fig. 14, other members are omitted from the illustration for clarity. Also, the following description with reference to FIG. 14 relates to the combination of the first lower wire SAD1 and the second lower wire SAD2, but can be similarly applied to the combination of the third lower wire SAD3 and the fourth lower wire SAD4.

[0070] Specifically, one end of the first lower wire SAD1 is fixed to the first support side terminal plate 5S1 at the holding portion J11 of the first support side terminal plate 5S1, and the other end of the first lower wire SAD1 is fixed to the upper end of the first lens side terminal plate 5L1 at the holding portion J12 of the first lens side terminal plate 5L1. Also, one end of the second lower wire SAD2 is fixed to the second support side terminal plate 5S2 at the holding portion J13 of the second support side terminal plate 5S2, and the other end of the second lower wire SAD2 is fixed to the lower end of the first lens side terminal plate 5L1 at the holding portion J14 of the first lens side terminal plate 5L1.

[0071] The holding portion J11 is formed by bending a part of the first support side terminal plate 5S1. Specifically, the part of the first support side terminal plate 5S1 is bent while sandwiching an end (one end) of the first lower wire SAD1 to form the holding portion J11. The end (one end) of the first lower wire SAD1 is fixed to the holding portion J11 by welding. The same applies to the holding portions J12 to J14.

[0072] In this manner, one end of the first lower wire SAD1 to the fourth lower wire SAD4 is fixed to the first support side terminal plate 5S1 to the fourth support side terminal plate 5S4, the other end of the first lower wire SAD1 and the second lower wire SAD2 is fixed to the first lens side terminal plate 5L1, and the other end of the third lower wire SAD3 and the fourth lower wire SAD4 is fixed to the second lens side terminal plate 5L2. The support member 3 to which the first support side terminal plate 5S1 to the fourth support side terminal plate 5S4 are attached is configured to function as a wire support member, and the lens holding member 2 to which the first lens side terminal plate 5L1 and the second lens side terminal plate 5L2 are attached is configured to function as a movable side member MB. With this configuration, the lens holding member 2 is supported by the first lower wire SAD1 to the fourth lower wire SAD4 and the support member 3 in a state in which it can move at least in the Z-axis direction, which is a direction parallel to the optical axis OA. Like the lens side metal member 5L, the support side metal member 5S has a third through hole 5H3 formed therein, which is used when fixing the support side metal member 5S to a side surface of the support member 3. The adhesive that bonds the support member 3 and the support side metal member 5S may be applied via the third through hole 5H3.

[0073] Next, the positional relationship between the fixed metal member 5F, the movable metal member 5M, the upper shape memory alloy wire SAU, and the lens holding member 2 will be described with reference to Fig. 15. Fig. 15 is a top view of the fixed metal member 5F, the movable metal member 5M, the upper shape memory alloy wire SAU, and the lens holding member 2. In Fig. 15, a dot pattern is applied to the lens holding member 2 for clarity.

[0074] As shown in FIG. 15, the upper shape memory alloy wire SAU includes a first upper wire SAU1 to a fourth upper wire SAU4 arranged to surround the cylindrical portion 12 of the lens holding member 2 in a plan view along the optical axis direction. The first upper wire SAU1 has one end fixed to the first fixed side terminal plate 5F1 and the other end fixed to the first movable side terminal plate 5M1. Similarly, the second upper wire SAU2 has one end fixed to the second fixed side terminal plate 5F2 and the other end fixed to the second movable side terminal plate 5M2. The third upper wire SAU3 has one end fixed to the third fixed side terminal plate 5F3 and the other end fixed to the third movable side terminal plate 5M3. The fourth upper wire SAU4 has one end fixed to the fourth fixed side terminal plate 5F4 and the other end fixed to the fourth movable side terminal plate 5M4.

[0075] In this way, the upper shape memory alloy wire SAU is supported by the four fixed side metal members 5F and the four movable side metal members 5M. From another perspective, the upper shape memory alloy wire SAU is supported by the four first shape metal members 5A and the four second shape metal members 5B. The four first shape metal members 5A are identical parts having the same shape, and include a first fixed side terminal plate 5F1, a second movable side terminal plate 5M2, a third fixed side terminal plate 5F3, and a fourth movable side terminal plate 5M4. Similarly, the four second shape metal members 5B are identical parts having the same shape, and include a first movable side terminal plate 5M1, a second fixed side terminal plate 5F2, a third movable side terminal plate 5M3, and a fourth fixed side terminal plate 5F4.

[0076] The adjacent first shaped metal member 5A and second shaped metal member 5B have shapes that are line symmetrical with respect to a dashed line intersecting the optical axis OA, as shown in Fig. 15. Each of the first upper wire SAU1 to fourth upper wire SAU4 is provided between one of the four first shaped metal members 5A and one of the four second shaped metal members 5B.

[0077] Next, the path of the current flowing through the upper shape memory alloy wire SAU will be described with reference to Fig. 16. Fig. 16 is a perspective view of the metal member 5 (first fixed side terminal plate 5F1 to fourth fixed side terminal plate 5F4 and first movable side terminal plate 5M1 to fourth movable side terminal plate 5M4), flexible metal member 6, upper conductive member CU (first upper conductive member CU1 to fifth upper conductive member CU5), and upper shape memory alloy wire SAU (first upper wire SAU1 to fourth upper wire SAU4), and shows the positional relationship between the metal member 5, flexible metal member 6, upper conductive member CU, and upper shape memory alloy wire SAU.

[0078] Specifically, when the first upper conductive member CU1 is connected to a high potential and the fifth upper conductive member CU5 is connected to a low potential, current flows through the first upper conductive member CU1, the first fixed side terminal plate 5F1, the first upper wire SAU1, the first movable side terminal plate 5M1, and the flexible metal member 6 (the first support fixing portion 6E1, the third support fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1) to the fifth upper conductive member CU5.

[0079] Furthermore, when the second upper conductive member CU2 is connected to a high potential and the fifth upper conductive member CU5 is connected to a low potential, current flows through the second upper conductive member CU2, the second fixed side terminal plate 5F2, the second upper wire SAU2, the second movable side terminal plate 5M2, and the flexible metal member 6 (the first support fixing portion 6E1, the third support fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1) to the fifth upper conductive member CU5.

[0080] Furthermore, when the third upper conductive member CU3 is connected to a high potential and the fifth upper conductive member CU5 is connected to a low potential, current flows through the third upper conductive member CU3, the third fixed side terminal plate 5F3, the third upper wire SAU3, the third movable side terminal plate 5M3, and the flexible metal member 6 (the second support fixing portion 6E2, the third support fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1) to the fifth upper conductive member CU5.

[0081] Furthermore, when the fourth upper conductive member CU4 is connected to a high potential and the fifth upper conductive member CU5 is connected to a low potential, current flows through the fourth upper conductive member CU4, the fourth fixed side terminal plate 5F4, the fourth upper wire SAU4, the fourth movable side terminal plate 5M4, and the flexible metal member 6 (the second support fixing portion 6E2, the third support fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1) to the fifth upper conductive member CU5.

[0082] A control device (not shown) external to the lens driving device 101 as described above can control the current flowing through each of the first upper wire SAU1 to the fourth upper wire SAU4 by controlling the voltage applied to each of the first upper conductive member CU1 to the fifth upper conductive member CU5, thereby individually controlling the contraction of each of the first upper wire SAU1 to the fourth upper wire SAU4. The control device may be disposed within the lens driving device 101. The control device may also be a component of the lens driving device 101.

[0083] The control device may use, for example, a driving force along a direction perpendicular to the optical axis OA caused by contraction of the upper shape memory alloy wire SAU as the second driving unit DM2 to move the lens holding member 2 along a direction perpendicular to the optical axis OA on the Z1 side (subject side) of the image sensor IS. By moving the lens holding member 2 in this manner, the control device may realize an image stabilization function, which is one of the lens adjustment functions.

[0084] Next, the path of the current flowing through the lower shape memory alloy wire SAD will be described with reference to Fig. 17 to Fig. 21. Fig. 17 is a perspective view of the metal member 5 (the first support side terminal plate 5S1 to the fourth support side terminal plate 5S4, the first lens side terminal plate 5L1, and the second lens side terminal plate 5L2), the upper conductive member CU (the sixth upper conductive member CU6 to the tenth upper conductive member CU10), the lower conductive member CD, and the lower shape memory alloy wire SAD (the first lower wire SAD1 to the fourth lower wire SAD4), and shows the positional relationship of the metal member 5, the upper conductive member CU, the lower conductive member CD, and the lower shape memory alloy wire SAD. Each of Fig. 18 to Fig. 21 is a perspective view of a part of the configuration shown in Fig. 17. Specifically, FIG. 18 is a perspective view of a portion relating to the first lower wire SAD1, FIG. 19 is a perspective view of a portion relating to the second lower wire SAD2, FIG. 20 is a perspective view of a portion relating to the third lower wire SAD3, and FIG. 21 is a perspective view of a portion relating to the fourth lower wire SAD4.

[0085] Specifically, Fig. 18 shows an example of a path of a current flowing through the first lower wire SAD1 when the sixth upper conductive member CU6 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential. When the sixth upper conductive member CU6 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential, a current flows through the sixth upper conductive member CU6, the first lower conductive member CD1, the first support side terminal plate 5S1, the first lower wire SAD1, the first lens side terminal plate 5L1, and the fifth lower conductive member CD5 to the tenth upper conductive member CU10, as shown by the arrows in Fig. 18.

[0086] 19 shows an example of a path of a current flowing through the second lower wire SAD2 when the seventh upper conductive member CU7 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential. When the seventh upper conductive member CU7 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential, a current flows through the seventh upper conductive member CU7, the second lower conductive member CD2, the second support side terminal plate 5S2, the second lower wire SAD2, the first lens side terminal plate 5L1, and the fifth lower conductive member CD5 to the tenth upper conductive member CU10, as shown by the arrows in FIG.

[0087] 20 shows an example of a path of a current flowing through the third lower wire SAD3 when the eighth upper conductive member CU8 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential. When the eighth upper conductive member CU8 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential, a current flows through the eighth upper conductive member CU8, the third lower conductive member CD3, the third support side terminal plate 5S3, the third lower wire SAD3, the second lens side terminal plate 5L2, and the fifth lower conductive member CD5 to the tenth upper conductive member CU10, as shown by the arrows in FIG.

[0088] 21 shows an example of a path of a current flowing through the fourth lower wire SAD4 when the ninth upper conductive member CU9 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential. When the ninth upper conductive member CU9 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential, a current flows through the ninth upper conductive member CU9, the fourth lower conductive member CD4, the fourth support side terminal plate 5S4, the fourth lower wire SAD4, the second lens side terminal plate 5L2, and the fifth lower conductive member CD5 to the tenth upper conductive member CU10, as shown by the arrows in FIG.

[0089] The control device can, for example, control the voltage applied to each of the sixth upper conductive member CU6 to the tenth upper conductive member CU10, thereby controlling the current flowing through each of the first lower wire SAD1 to the fourth lower wire SAD4, and thereby individually controlling the contraction of each of the first lower wire SAD1 to the fourth lower wire SAD4.

[0090] The control device may, for example, use a driving force along a direction parallel to the optical axis OA caused by contraction of the lower shape memory alloy wire SAD as the first driving unit DM1 to move the lens holding member 2 along a direction parallel to the optical axis OA on the Z1 side (subject side) of the image sensor IS. By moving the lens holding member 2 in this manner, the control device may realize an automatic focus adjustment function, which is one of the lens adjustment functions. Specifically, the control device may move the lens holding member 2 in a direction away from the image sensor IS to enable macro photography, and move the lens holding member 2 in a direction approaching the image sensor IS to enable infinity photography.

[0091] In addition, the control device may be configured to perform feedback control of the current flowing through the shape memory alloy wire SA by detecting the length (amount of contraction) of the shape memory alloy wire SA based on the output of a sensor that detects the resistance value of the shape memory alloy wire SA.

[0092] Next, referring to Figures 22 and 23, we will explain the relationship between the inner biasing means IN, which is a biasing means that applies a force that pushes or attracts the lens holding member 2 and the support member 3 against each other, and the inner guided portion IGD guided by the inner guiding portion IG and the inner guiding portion IG.

[0093] Fig. 22 is a layout diagram of the lens holding member 2, the support side metal member 5S, the lens side metal member 5L, the guide member 7, the first magnetic member 9, the second magnetic member 10, the yoke 11, and the lower shape memory alloy wire SAD. Specifically, the upper diagram of Fig. 22 is a top view of the lens holding member 2, the support side metal member 5S, the lens side metal member 5L, the guide member 7, the first magnetic member 9, the second magnetic member 10, the yoke 11, and the lower shape memory alloy wire SAD, and the lower diagram of Fig. 22 is a front view of the support side metal member 5S, the lens side metal member 5L, the front guide member 7F, the first front side magnetic member 9F, the second front side magnetic member 10F, the front side yoke 11F, the first lower side wire SAD1, and the second lower side wire SAD2. In Fig. 22, for clarity, dot patterns are applied to the guide member 7, the first magnetic member 9, the second magnetic member 10, and the yoke 11.

[0094] Fig. 23 is a front view of the lens holding member 2, the support member 3, the support side metal member 5S, the lens side metal member 5L, the guide member 7, the first magnetic member 9, the second magnetic member 10, and the lower shape memory alloy wire SAD. Specifically, the upper view of Fig. 23 shows a configuration example of the inner urging means IN in the lens driving device 101 according to the above embodiment, and the lower view of Fig. 23 shows another configuration example of the inner urging means IN. More specifically, the inner urging means IN in the upper view of Fig. 23 is configured to utilize the magnetic attractive force acting between the first magnetic member 9 and the second magnetic member 10, and the inner urging means IN in the lower view of Fig. 23 is configured to utilize the magnetic repulsive force acting between the first magnetic member 9 and the second magnetic member 10. In Fig. 23, for clarity, dot patterns are applied to the lens holding member 2, the support member 3, and the guide member 7, and a cross pattern and a diagonal line pattern are applied to the N-pole portion and the S-pole portion of the first magnetic member 9 and the second magnetic member 10 as magnets, respectively. In Fig. 23, each member is shown diagrammatically, and the direction and magnitude of the force acting on each member are shown by arrows. In Fig. 23, for convenience, the Z-axis direction corresponds to the vertical direction, and the Y-axis direction corresponds to the horizontal direction.

[0095] Specifically, the block arrow in the upper diagram of FIG. 23 indicates how the lens holding member 2 moves downward when the contractile force F1 of the first lower wire SAD1 is greater than the contractile force F2 of the second lower wire SAD2.

[0096] More specifically, the upper diagram of Fig. 23 shows that the contraction force F1 of the first lower wire SAD1 is decomposed into a downward vertical component F1z and a leftward horizontal component F1x, and the contraction force F2 of the second lower wire SAD2 is decomposed into an upward vertical component F2z and a leftward horizontal component F2x. The upper diagram of Fig. 23 also shows how the lens holding member 2 to which the second front magnetic member 10F is fixed is pulled to the right by the magnetic attractive force F3 acting between the first front magnetic member 9F and the second front magnetic member 10F. The upper diagram of Fig. 23 also shows how a rightward contact force Fx acts between the front groove portion 2VF of the lens holding member 2 pulled to the right and the front guide member 7F. The contact force Fx corresponds to the resultant force of the leftward horizontal component F1x of the contraction force F1, the leftward horizontal component F2x of the contraction force F2, and the rightward attractive force F3. The static friction force μFx is a force derived by multiplying the contact force Fx by the static friction coefficient μ between the front groove portion 2VF and the front guide member 7F. When the magnitude of the driving force Fz by the first driving unit DM1 (lower shape memory alloy wire SAD) exceeds the magnitude of the static friction force μFx, the lens holding member 2 moves in the vertical direction (Z-axis direction). The driving force Fz corresponds to the resultant force of the downward vertical component F1z of the contraction force F1 and the upward vertical component F2z of the contraction force F2. The upper diagram of FIG. 23 shows the state in which the lens holding member 2 moves downward because the downward driving force Fz exceeds the static friction force μFx. The way in which the force is applied when the lens holding member 2 moves upward is similar to the way in which the force is applied when the lens holding member 2 moves downward, except that the contraction force F1 is smaller than the contraction force F2.

[0097] The same is true for the case where the magnetic repulsive force acting between the first magnetic member 9 and the second magnetic member 10 is utilized. Specifically, the block arrow in the lower diagram of FIG. 23 shows how the lens holding member 2 moves downward when the contraction force F1 of the first lower wire SAD1 is greater than the contraction force F2 of the second lower wire SAD2. More specifically, the lower diagram of FIG. 23 shows how the lens holding member 2 to which the second front magnetic member 10F is fixed is pushed to the right by the magnetic repulsive force F4 acting between the first front magnetic member 9F and the second front magnetic member 10F. The contraction forces F1, F2, contact force Fx, and driving force Fz are applied in the same manner as in the upper diagram of FIG. 23.

[0098] With the above-mentioned configuration, the control device can move the lens holding member 2 in the Z-axis direction by individually controlling the contraction of the first to fourth lower wires SAD1 to SAD4 by individually passing a current through each of the first to fourth lower wires SAD1 to SAD4. This configuration also has the effect of being able to maintain the position of the lens holding member 2 in the Z-axis direction even when the supply of current to each of the first to fourth lower wires SAD1 to SAD4 is interrupted and the driving force Fz (contraction forces F1 and F2) disappears. This is because the contact force Fx becomes larger than before the driving force Fz disappears by the amount that the horizontal component F1x of the contraction force F1 and the horizontal component F2x of the contraction force F2 have disappeared, and becomes approximately equal to the attractive force F3. In other words, the front groove portion 2VF of the lens holding member 2, which is pulled to the right by the attractive force F3, is pressed against the front guide member 7F, generating a contact force Fx, and the static friction force μFx based on the contact force Fx is greater than the driving force Fz (=0) by the first driving unit DM1.

[0099] Next, the relationship between the outer guiding part EG, the outer guided part EGD, and the outer biasing means EN will be described with reference to Figures 24 and 25. Figure 24 is a bottom view of the support member 3 to which the magnet 8 constituting the outer biasing means EN is attached. Note that in Figure 24, for clarity, a dot pattern is applied to the magnet 8 housed in the recess 3U of the support member 3 (see the upper diagram in Figure 12) and fixed with an adhesive or the like.

[0100] 24, a protrusion 3S that protrudes downward is formed on the lower surface of the support member 3. In the illustrated example, the protrusion 3S is a part that constitutes the outer guided portion EGD that is guided by the bottom plate portion 4D of the lower cover member 4L that functions as the outer guiding portion EG, and includes a first protrusion 3S1 to a fourth protrusion 3S4.

[0101] Specifically, the first protrusion 3S1 to the fourth protrusion 3S4 have the same protrusion amount and are configured to be able to simultaneously contact the bottom plate portion 4D of the lower cover member 4L and slide on the bottom plate portion 4D. Also, each of the first protrusion 3S1 to the fourth protrusion 3S4 is arranged to correspond to one of the four corners of the support member 3. Also, each of the first protrusion 3S1 to the fourth protrusion 3S4 is arranged to be equally distant from the optical axis OA. However, the number of protrusions 3S may be three, or may be five or more. Also, as long as they can simultaneously contact the bottom plate portion 4D, each of the first protrusion 3S1 to the fourth protrusion 3S4 may be different in protrusion amount. Also, each of the first protrusion 3S1 to the fourth protrusion 3S4 may be arranged to be different in distance from the optical axis OA.

[0102] Furthermore, as shown in FIG. 25, the support member 3 is configured such that when the bottom plate portion 4D of the lower cover member 4L is in contact with the protrusion portion 3S, the magnet 8 is positioned a predetermined distance away from the bottom plate portion 4D.

[0103] Fig. 25 is a perspective cross-sectional view of the lower cover member 4L that houses the support member 3. Specifically, the top view of Fig. 25 is a view including cross sections of the third protrusion 3S3 and the fourth protrusion 3S4, the second view from the top of Fig. 25 is a view including cross sections of the first protrusion 3S1 and the front magnet 8F, the third view from the top of Fig. 25 is a view including cross sections of the third protrusion 3S3 and the rear magnet 8B, and the bottom view of Fig. 25 is a view including cross sections of the first protrusion 3S1 and the second protrusion 3S2.

[0104] More specifically, the support member 3 is configured so that the bottom plate portion 4D and the front magnet 8F are positioned a distance GP1 apart, as shown in the second figure from the top of Figure 25, and so that the bottom plate portion 4D and the rear magnet 8B are positioned a distance GP2 apart, as shown in the third figure from the top of Figure 25.

[0105] In the illustrated example, the support member 3 is configured so that the distance GP1 and the distance GP2 are the same, but the distance GP1 and the distance GP2 may be configured so that they are different from each other. The number of magnets 8 may be one, or three or more.

[0106] With this configuration, the magnet 8 constituting the outer biasing means EN and the bottom plate portion 4D of the lower cover member 4L can move the support member 3 in a direction perpendicular to the optical axis direction relative to the lower cover member 4L while the support member 3 and the lower cover member 4L are in contact with each other. This is because the support member 3 is attracted to the bottom plate portion 4D of the lower cover member 4L by the magnetic force of the magnet 8 attached to the support member 3.

[0107] Next, a lens driving device 101A, which is another configuration example of the lens driving device 101 according to the embodiment of the present disclosure, will be described with reference to Fig. 26 and Fig. 27. Fig. 26 is an exploded perspective view of the lens driving device 101A constituting the camera module CM, and corresponds to Fig. 2. Fig. 27 is an exploded perspective view of the main body unit MN constituting the lens driving device 101A, and corresponds to Fig. 3.

[0108] 27, the lens driving device 101A differs from the lens driving device 101 in that the first driving unit DM1 moves the lens holding member 2 in the optical axis direction by using a spiral mechanism. Note that in the lens driving device 101, the first driving unit DM1 moves the lens holding member 2 in the optical axis direction by using a slide mechanism composed of a groove portion 2V formed in the lens holding member 2 and a guide member 7.

[0109] Specifically, the spiral mechanism is typically a mechanism as disclosed in International Publication No. 2021 / 240165. More specifically, the spiral mechanism is a mechanism consisting of a groove portion 2V formed in the lens holding member 2, a groove portion 3V formed in the support member 3, and a ball disposed between the groove portion 2V and the groove portion 3V.

[0110] In the illustrated example, the lens driving device 101A differs from the lens driving device 101 in that the guide member 7 functioning as the inside guide portion IG is composed of three balls (first ball 71 to third ball 73) as shown in Fig. 27. In the lens driving device 101, the inside guide portion IG (guide member 7) is composed of two substantially cylindrical rear guide member 7B and front guide member 7F as shown in Fig. 3. The three balls may be made of metal, synthetic resin, or ceramic.

[0111] 27, the lens driving device 101A differs from the lens driving device 101 in that three grooves 3V (only one of which is visible in FIG. 27) extending obliquely to the optical axis direction formed in the support member 3 and three grooves 2V extending obliquely to the optical axis direction formed in the lens holding member 2 function as the inner guided portion IGD. Note that in the lens driving device 101, the inner guided portion IGD is composed of two grooves 2V formed in the lens holding member 2 as shown in FIG.

[0112] Each of the first ball 71 to the third ball 73 is sandwiched between a groove portion 2V formed in the lens holding member 2 and a groove portion 3V formed in the support member 3, and is arranged so as to be able to move diagonally between groove portions 2V and 3V.

[0113] Therefore, in the illustrated example, the control device can move the lens holding member 2 upward (in the Z1 direction) while rotating it counterclockwise in a planar view about the optical axis by contracting the first lower wire SAD1, and can move the lens holding member 2 downward (in the Z2 direction) while rotating it clockwise in a planar view about the optical axis by contracting the second lower wire SAD2.

[0114] Next, the path of the current flowing through the upper shape memory alloy wire SAU constituting the lens driving device 101A will be described with reference to Fig. 28. Fig. 28 is a perspective view of the metal member 5 (first fixed side terminal plate 5F1 to fourth fixed side terminal plate 5F4 and first movable side terminal plate 5M1 to fourth movable side terminal plate 5M4), flexible metal member 6, upper conductive member CU (first upper conductive member CU1 to fifth upper conductive member CU5), and upper shape memory alloy wire SAU (first upper wire SAU1 to fourth upper wire SAU4), and corresponds to Fig. 16.

[0115] Specifically, when the first upper conductive member CU1 is connected to a high potential and the fifth upper conductive member CU5 is connected to a low potential, current flows through the first upper conductive member CU1, the first fixed side terminal plate 5F1, the first upper wire SAU1, the first movable side terminal plate 5M1, and the flexible metal member 6 (the first support fixing portion 6E1, the third support fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1) to the fifth upper conductive member CU5.

[0116] When the second upper conductive member CU2 is connected to a high potential and the fifth upper conductive member CU5 is connected to a low potential, current flows through the second upper conductive member CU2, the second fixed side terminal plate 5F2, the second upper wire SAU2, the second movable side terminal plate 5M2, and the flexible metal member 6 (the first support fixing portion 6E1, the third support fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1) to the fifth upper conductive member CU5.

[0117] Furthermore, when the third upper conductive member CU3 is connected to a high potential and the fifth upper conductive member CU5 is connected to a low potential, current flows through the third upper conductive member CU3, the third fixed side terminal plate 5F3, the third upper wire SAU3, the third movable side terminal plate 5M3, and the flexible metal member 6 (the second support fixing portion 6E2, the third support fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1) to the fifth upper conductive member CU5.

[0118] Furthermore, when the fourth upper conductive member CU4 is connected to a high potential and the fifth upper conductive member CU5 is connected to a low potential, current flows through the fourth upper conductive member CU4, the fourth fixed side terminal plate 5F4, the fourth upper wire SAU4, the fourth movable side terminal plate 5M4, and the flexible metal member 6 (the second support fixing portion 6E2, the third support fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1) to the fifth upper conductive member CU5.

[0119] Next, the path of the current flowing through the lower shape memory alloy wire SAD constituting the lens driving device 101A will be described with reference to Fig. 29. Fig. 29 is a perspective view of the metal member 5 (first support side terminal plate 5S1, second support side terminal plate 5S2, first lens side terminal plate 5L1, and second lens side terminal plate 5L2), the upper conductive member CU (sixth upper conductive member CU6, seventh upper conductive member CU7, and tenth upper conductive member CU10), the lower conductive member CD (first lower conductive member CD1 to third lower conductive member CD3), and the lower shape memory alloy wire SAD (first lower wire SAD1 and second lower wire SAD2), and corresponds to Fig. 17.

[0120] Specifically, when the sixth upper conductive member CU6 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential, current flows through the sixth upper conductive member CU6, the first lower conductive member CD1, the first support side terminal plate 5S1, the first lower wire SAD1, the first lens side terminal plate 5L1, and the third lower conductive member CD3 to the tenth upper conductive member CU10.

[0121] Furthermore, when the seventh upper conductive member CU7 is connected to a high potential and the tenth upper conductive member CU10 is connected to a low potential, current flows through the seventh upper conductive member CU7, the second lower conductive member CD2, the second support side terminal plate 5S2, the second lower wire SAD2, the second lens side terminal plate 5L2, and the third lower conductive member CD3 to the tenth upper conductive member CU10.

[0122] Next, the outer biasing means EN, the outer guiding part EG, and the outer guided part EGD constituting the lens driving device 101A will be described with reference to FIG. 30. FIG. 30 is a perspective view of the support member 3. Specifically, the upper view of FIG. 30 is a perspective view of the support member 3 in a state in which the magnet 8 is attached, the center view of FIG. 30 is a perspective view of the support member 3 in a state in which the flexible metal member 6 is further attached, and the lower view of FIG. 30 is a perspective view of the support member 3 in a state in which the upper conductive member CU (the third upper conductive member CU3 and the fifth upper conductive member CU5) is further attached. For clarity, in the upper view of FIG. 30, a dot pattern is applied to the magnet 8, in the center view of FIG. 30, a dot pattern is applied to the flexible metal member 6, and in the lower view of FIG. 30, a dot pattern is applied to the upper conductive member CU (the third upper conductive member CU3 and the fifth upper conductive member CU5).

[0123] Specifically, the lens driving device 101A differs from the lens driving device 101 in that the top plate portion 4B of the upper cover member 4U, which is made of a magnetic metal, functions as the outer biasing means EN, in that the top plate portion 4B of the upper cover member 4U functions as the outer biasing means EN.

[0124] 30, the lens driving device 101A differs from the lens driving device 101 in that a protrusion 3S functioning as the outer guided part EGD is formed on the upper surface of the support member 3. In the lens driving device 101, the protrusion 3S functioning as the outer guided part EGD is formed on the lower surface of the support member 3.

[0125] Also, the lens driving device 101A differs from the lens driving device 101 in that the base fixing portion 6N of the flexible metal member 6 functions as the outer guide portion EG as shown in the center diagram of Fig. 30, and in that the exposed portion EX of the upper conductive member CU functions as the outer guide portion EG as shown in the lower diagram of Fig. 30. The exposed portion EX is a part of the upper conductive member CU, and is formed so as to be exposed on the lower surface of the fixed support member 1 separately from the joint surface portion CS. Note that the lens driving device 101 is configured so that the bottom plate portion 4D of the lower cover member 4L functions as the outer guide portion EG.

[0126] Specifically, in the lens driving device 101A, the first protrusion 3S1 of the support member 3 functioning as the first outer guided portion EGD1 contacts the second base fixing portion 6N2 of the flexible metal member 6 functioning as the first outer guide portion EG1. The second protrusion 3S2 of the support member 3 functioning as the second outer guided portion EGD2 contacts the third exposed portion EX3 of the third upper conductive member CU3 functioning as the second outer guide portion EG2. The third protrusion 3S3 of the support member 3 functioning as the third outer guided portion EGD3 contacts the first base fixing portion 6N1 of the flexible metal member 6 functioning as the third outer guide portion EG3. The fourth protrusion 3S4 of the support member 3 functioning as the fourth outer guided portion EGD4 contacts the fifth exposed portion EX5 of the fifth upper conductive member CU5 functioning as the fourth outer guide portion EG4.

[0127] With this configuration, the magnet 8 constituting the external biasing means EN and the top plate portion 4B of the upper cover member 4U attract the support member 3 and the upper cover member 4U to each other, thereby allowing the support member 3 to be moved in a direction perpendicular to the optical axis direction relative to the upper cover member 4U while keeping the support member 3 in contact with each of the flexible metal member 6 and the upper conductive member CU.

[0128] As described above, the lens driving device 101 according to the embodiment of the present disclosure includes, as shown in Fig. 3, a support member 3, a lens holding member 2 having a cylindrical portion 12 in which a lens body LS can be arranged and movable in the optical axis direction relative to the support member 3, and a plurality of shape memory alloy wires SA (lower shape memory alloy wires SAD) provided between the support member 3 and the lens holding member 2 to move the lens holding member 2 in the optical axis direction. The support member 3 has an inner guide portion IG (guide member 7) that guides the movement of the lens holding member 2 in the optical axis direction, and a first magnetic member 9. The lens holding member 2 has an inner guided portion IGD (groove portion 2V) that slides on the inner guide portion IG (guide member 7) and is guided by the inner guide portion IG (guide member 7), and a second magnetic member 10 that is disposed at a position away from the first magnetic member 9 in a direction intersecting the optical axis direction. At least one of the first magnetic member 9 and the second magnetic member 10 is composed of a magnet, and the magnetic force generated between the first magnetic member 9 and the second magnetic member 10 applies a force that pushes the inner guiding portion IG (guide member 7) and the inner guided portion IGD (groove portion 2V) against each other in a direction intersecting the optical axis direction, so that the inner guiding portion IG (guide member 7) and the inner guided portion IGD (groove portion 2V) are in contact with each other regardless of the position of the lens holding member 2 in the optical axis direction.

[0129] This configuration allows the lens driving device 101 to achieve power saving. This is because a contact force (friction force) acts between the support member 3 (inner guiding portion IG (guiding member 7)) and the lens holding member 2 (inner guided portion IGD (groove portion 2V)), so the lens driving device 101 can hold the position of the lens holding member 2 without passing a current through the shape memory alloy wire SA (lower shape memory alloy wire SAD), or by passing a small current through the shape memory alloy wire SA (lower shape memory alloy wire SAD).

[0130] In addition, the shape memory alloy wire SA (lower shape memory alloy wire SAD) may contract so as to reduce the force (friction force) with which the inner guiding portion IG (guiding member 7) and the inner guided portion IGD (groove portion 2V) press against each other when current flows through the shape memory alloy wire SA (lower shape memory alloy wire SAD), as shown in the upper diagram of Figure 23.

[0131] With this configuration, the lens driving device 101 can reduce the contact force (frictional force) between the inner guiding portion IG (guiding member 7) and the inner guided portion IGD (groove portion 2V) when the lens holding member 2 moves in the optical axis direction, thereby making it easier to maintain the position of the lens holding member 2 by increasing the contact force (frictional force) when no current is applied.

[0132] 23, the shape memory alloy wire SA (lower shape memory alloy wire SAD) may include a first wire (first lower wire SAD1) whose one end supported by the support member 3 is positioned lower in the optical axis direction than the other end supported by the lens holding member 2, and a second wire (second lower wire SAD2) whose one end supported by the support member 3 is positioned higher in the optical axis direction than the other end supported by the lens holding member 2. In this case, each of the first wire (first lower wire SAD1) and the second wire (second lower wire SAD2) may have one end fixed to a first metal member (support side metal member 5S) provided on the support member 3 and the other end fixed to a second metal member (lens side metal member 5L) provided on the lens holding member 2. Furthermore, each of the first wire (first lower wire SAD1) and the second wire (second lower wire SAD2) may be arranged such that in a direction intersecting the optical axis direction (Y-axis direction), the position at which one end is fixed to the first metal member (support side metal member 5S) is farther from the inner guide portion IG (guide member 7) than the position at which the other end is fixed to the second metal member (lens side metal member 5L).

[0133] With this configuration, the lens driving device 101 can easily move the lens holding member 2 up and down by the first lower wire SAD1 and the second lower wire SAD2. Furthermore, the lens driving device 101 can effectively reduce the contact force (friction force) between the inner guiding portion IG (guiding member 7) and the inner guided portion IGD (groove portion 2V) when energized.

[0134] Also, the second magnetic member 10 and the inner guided portion IGD (groove portion 2V) may be provided at adjacent positions in the lens holding member 2 as shown in the upper diagram of FIG. 22. Here, "adjacent" preferably means that the distance DS1 between the second magnetic member 10 (second front magnetic member 10F) and the inner guided portion IGD (groove portion 2V (front groove portion 2VF)) in the Y-axis direction is smaller than half the length of the lower shape memory alloy wire SAD, and more preferably means that it is smaller than the length DS2 (see FIG. 7) of the inner guided portion IGD (groove portion 2V) in the optical axis direction. This is to suppress the rotation of the lens holding member 2 around the inner guide portion IG (guide member 7).

[0135] With this configuration, the lens driving device 101 can increase the force with which the inner guiding portion IG (the guiding member 7) and the inner guided portion IGD (the groove portion 2V) press against each other.

[0136] Furthermore, both the first magnetic member 9 and the second magnetic member 10 may be made of magnets. In this case, the magnetic force generated between the first magnetic member 9 and the second magnetic member 10 may be an attractive force.

[0137] This configuration brings about the effect that the force of attraction between the lens holding member 2 and the support member 3 can be made greater than in a configuration in which either the first magnetic member 9 or the second magnetic member 10 is not a magnet.

[0138] In addition, the first magnetic member 9 may be attached to the support member 3 via an anti-slip structure as shown in FIG. 12, and the second magnetic member 10 may be attached to the lens holding member 2 via an anti-slip structure as shown in FIG. 8.

[0139] This configuration brings about the effect of being able to suppress the first magnetic member 9 and the second magnetic member 10 from falling off in the direction in which the magnetic force generated between the first magnetic member 9 and the second magnetic member 10 acts.

[0140] Furthermore, the inner guiding portion IG (guide member 7) may have a curved convex portion protruding toward the inner guided portion IGD (groove portion 2V) as shown in the upper diagram of Fig. 22. In this case, the inner guided portion IGD (groove portion 2V) may have a concave portion capable of receiving the convex portion as shown in the upper diagram of Fig. 22. In the illustrated example, the guide member 7 has a substantially cylindrical convex portion protruding toward the groove portion 2V, and the groove portion 2V has a concave portion capable of receiving the substantially cylindrical convex portion.

[0141] This configuration brings about the effect that it is easier to miniaturize the lens driving device 101 compared to a configuration in which the inner guiding portion IG (guiding member 7) is provided on the lens holding member 2 and the inner guided portion IGD is provided on the support member 3. This is because the inner guiding portion IG (guiding member 7) is desirably configured so that its length in the optical axis direction is greater than the length of the inner guided portion IGD.

[0142] Also, the support member 3 may have two inner guide portions IG (a rear guide member 7B and a front guide member 7F) as shown in the center diagram of FIG. 12. In this case, the lens holding member 2 may have two inner guided portions IGD (a rear groove portion 2VB and a front groove portion 2VF) as shown in the upper diagram of FIG. 22. In this case, the two inner guided portions IGD (the rear groove portion 2VB and the front groove portion 2VF) may be configured so that one is a V-shaped groove (a groove that receives the guide member 7 at two points) and the other is a U-shaped groove (a groove that receives the guide member 7 at one point). In the illustrated example, the rear groove portion 2VB is a V-shaped groove and the front groove portion 2VF is a U-shaped groove.

[0143] This configuration has the advantage of stabilizing the posture of the lens holding member 2 when moving the lens holding member 2 in the optical axis direction, compared to a configuration in which the support member 3 has one inner guiding portion IG and the lens holding member 2 has one inner guided portion IGD.

[0144] Furthermore, the two inner guiding members IG (the rear guide member 7B and the front guide member 7F) may be disposed so as to face each other across the optical axis OA, as shown in the upper diagram of Fig. 22. In this case, the two inner guided members IGD (the rear groove portion 2VB and the front groove portion 2VF) may be disposed so as to face each other across the optical axis OA.

[0145] This configuration has the advantage of being able to stabilize the posture of the lens holding member 2 when moving the lens holding member 2 in the optical axis direction, compared to a configuration in which the two inner guide portions IG are positioned closer together.

[0146] Also, one first wire (first lower wire SAD1) and one second wire (second lower wire SAD2) may be arranged to cross in a side view seen from a direction perpendicular to the optical axis direction to form a wire pair, as shown in the lower diagram of Fig. 22. In this case, the shape memory alloy wire SA may include two wire pairs, as shown in the upper diagram of Fig. 22. One wire pair (first lower wire SAD1 and second lower wire SAD2) and the other wire pair (third lower wire SAD3 and fourth lower wire SAD4) may be arranged to face each other across the optical axis OA.

[0147] This configuration provides the advantage of being able to stabilize the posture of the lens holding member 2 when moving the lens holding member 2 in the optical axis direction, as compared to a configuration in which the first driving unit DM1 is realized by one wire pair. Also, this configuration provides the advantage of being able to increase the driving force of the first driving unit DM1, as compared to a configuration in which the first driving unit DM1 is realized by one wire pair.

[0148] In addition, as shown in FIG. 25, the lens driving device 101 may include a fixed side member FB (lower cover member 4L) having a flat outer guide portion EG (bottom plate portion 4D) that guides the support member 3 in a direction perpendicular to the optical axis direction (X-axis direction and Y-axis direction), and a driving unit DM (second driving unit DM2) that moves the support member 3 in a direction perpendicular to the optical axis direction (X-axis direction and Y-axis direction).

[0149] Compared to a configuration without the flat outer guide portion EG, this configuration brings about the effect of being able to stabilize the attitude of the support member 3 when the support member 3 is moved in a direction perpendicular to the optical axis direction.

[0150] 3, the lens driving device 101 according to the embodiment of the present disclosure includes a fixed member FB, a lens holding member 2 having a cylindrical portion 12 capable of holding a lens body LS arranged opposite to an image sensor IS, a support member 3 movable in a direction intersecting the optical axis direction of the lens body LS relative to the fixed member FB (X-axis direction and Y-axis direction) and provided outside the lens holding member 2, a first drive unit DM1 that moves the lens holding member 2 in the optical axis direction relative to the support member 3, and a second drive unit DM2 having a plurality of upper shape memory alloy wires SAU as a plurality of shape memory alloy wires SA that move the support member 3 in a direction intersecting the optical axis direction (X-axis direction and Y-axis direction) relative to the fixed member FB. The upper shape memory alloy wires SAU are arranged closer to the subject than the first drive unit DM1.

[0151] With this configuration, the lens driving device 101 can separate the upper shape memory alloy wire SAU that constitutes the second driving unit DM2 from the image sensor IS, thereby suppressing the effect of the current flowing through the shape memory alloy wire SA (upper shape memory alloy wire SAU) for image stabilization on the image sensor IS.

[0152] 15, each of the upper shape memory alloy wires SAU may be disposed outside the cylindrical portion 12 of the lens holding member 2 in a plan view along the optical axis direction. In this case, each of the upper shape memory alloy wires SAU may have one end fixed to a fixed side metal member 5F formed of a metal plate provided on the fixed side member FB (fixed support member 1), and the other end fixed to a movable side metal member 5M formed of a metal plate provided on the support member 3.

[0153] This configuration brings about the effect that the upper shape memory alloy wire SAU can be attached with a simple configuration using the fixed side metal member 5F and the movable side metal member 5M.

[0154] Specifically, the upper shape memory alloy wires SAU may include four upper shape memory alloy wires SAU (first upper wire SAU1 to fourth upper wire SAU4) arranged to surround the cylindrical portion 12 of the lens holding member 2 in a plan view along the optical axis direction, as shown in Fig. 15. In this case, each of the four upper shape memory alloy wires SAU may have one end fixed to a fixed side metal member 5F formed of a metal plate provided on the fixed side member FB, and the other end fixed to a movable side metal member 5M formed of a metal plate provided on the support member 3. The plate surfaces of the fixed side metal member 5F and the movable side metal member 5M may be approximately perpendicular to the optical axis OA, as shown in the lower diagram of Fig. 13.

[0155] This configuration enables the fixed metal member 5F and the movable metal member 5M to be attached to the fixed support member 1 or the support member 3 from above, thereby improving the productivity (assembly) of the lens driving device 101. This configuration also has the effect of reducing the size of the lens driving device 101 in the optical axis direction, i.e., making the lens driving device 101 thinner.

[0156] Furthermore, the eight metal members 5 (the first fixed side terminal plate 5F1 to the fourth fixed side terminal plate 5F4 and the first movable side terminal plate 5M1 to the fourth movable side terminal plate 5M4) including the fixed side metal member 5F and the movable side metal member 5M may be composed of four first shape metal members 5A having a first shape and four second shape metal members 5B having a second shape, as shown in Fig. 15. The upper shape memory alloy wire SAU may be provided between the first shape metal member 5A and the second shape metal member 5B.

[0157] This configuration brings about an effect of improving the productivity (assembly) of the lens driving device 101, since the second driving section DM2 can be assembled by preparing only one type of unit in which the upper shape memory alloy wire SAU is fixed between the first shape metal member 5A and the second shape metal member 5B. Also, in this configuration, the first shape metal member 5A is mass-produced using the same die, and the second shape metal member 5B is also mass-produced using the same die. Therefore, this configuration brings about an effect of suppressing the variation between parts related to each of the first shape metal member 5A and the second shape metal member 5B.

[0158] Also, the fixed member FB may include a fixed support member 1 in which a plurality of conductive members CN (first upper conductive member CU1 to tenth upper conductive member CU10 as upper conductive members CU) are embedded, as shown in FIG. 4. In this case, the plurality of conductive members CN may include conductive members CN (first upper conductive member CU1 to fourth upper conductive member CU4) that are electrically connected to the fixed metal member 5F, as shown in FIG. 5. Also, the fixed support member 1 may have a base 1B arranged on the subject side (Z1 side) of the support member 3, and a plurality of legs 1D extending downward from the outer periphery of the base 1B, as shown in FIG. 4. And, at least a part of the plurality of shape memory alloy wires SA (first upper wire SAU1 to fourth upper wire SAU4) may be arranged on the upper side, which is the subject side, of the base 1B, as shown in FIG. 3.

[0159] This configuration brings about an effect of suppressing contact between the upper shape memory alloy wire SAU and the upper conductive member CU.

[0160] 2, the fixed-side member FB may include a housing HS in which the fixed support member 1 is housed. The conductive members CN (first upper conductive member CU1 to fourth upper conductive member CU4) that are electrically connected to the fixed-side metal member 5F may have a joint surface portion CS (first joint surface portion CS1 to fourth joint surface portion CS4) exposed from the base portion 1B and connected to the fixed-side metal member 5F, an external terminal portion TM exposed to the outside of the housing HS, and a wiring portion RT provided between the joint surface portion CS and the external terminal portion TM and embedded inside the fixed support member 1, as shown in the upper diagrams of FIGS. 4 and 5. The external terminal portion TM may be exposed from the lower portion of the leg portion 1D.

[0161] In this configuration, a relatively long wiring portion RT is embedded in the fixed support member 1. Therefore, this configuration has an effect of suppressing undesired contact between adjacent upper conductive members CU or undesired contact between the upper conductive member CU and the upper shape memory alloy wire SAU.

[0162] The multiple conductive members CN may include a conductive member CN (fifth upper conductive member CU5) that is electrically connected to the movable metal member 5M (first movable terminal plate 5M1 to fourth movable terminal plate 5M4) as shown in Fig. 16. In this case, a part of the fifth upper conductive member CU5 may form an external terminal portion TM (fifth external terminal portion TM5) exposed from the lower portion of the leg portion 1D (second leg portion 1D2) as shown in Fig. 4.

[0163] This configuration brings about the effect that a conductive path leading to the movable metal member 5M can be easily provided.

[0164] Also, the fixed member FB (lower cover member 4L) may have an outer guide portion EG (bottom plate portion 4D) that guides the movement of the support member 3 in a direction perpendicular to the optical axis direction (X-axis direction and Y-axis direction), as shown in FIG. 25. In this case, the support member 3 may have an outer guided portion EGD (projection portion 3S) that slides with the outer guide portion EG (bottom plate portion 4D) and is guided by the outer guide portion EG (bottom plate portion 4D). One of the outer guide portion EG and the outer guided portion EGD (a part of the support member 3) may have a plurality of projection portions 3S that project toward the other of the outer guide portion EG and the outer guided portion EGD (bottom plate portion 4D of the lower cover member 4L), as shown in FIG. 25. In this case, the lens driving device 101 may further include an outer biasing means EN that applies a force that attracts the other of the outer guide portion EG and the outer guided portion EGD (bottom plate portion 4D) and the projection portion 3S to each other.

[0165] With this configuration, the lens driving device 101 can stably guide the movement of the support member 3. In the illustrated example, the multiple protrusions 3S are formed on a part of the support member 3 serving as the outer guided portion EGD, but they may be formed on the lower cover member 4L functioning as the outer guiding portion EG. In this case, the portion of the support member 3 that comes into contact with the protrusions formed on the lower cover member 4L may be formed to be flat.

[0166] As shown in FIG. 25, the outer biasing means EN may be composed of a magnet 8 provided on the support member 3 and a magnetic metal member (lower cover member 4L) constituting the fixed-side member FB.

[0167] This configuration brings about the effect that the force that presses the movable member MB and the fixed member FB against each other can be easily generated by magnetic force.

[0168] 2, the fixed member FB may have a housing HS capable of housing the support member 3. In this case, at least a part of the housing HS (the bottom plate portion 4D of the lower cover member 4L) may be made of a magnetic metal. The magnetic metal member constituting the outer biasing means EN may be made of at least a part of the housing HS (the bottom plate portion 4D of the lower cover member 4L).

[0169] This configuration has the advantage that an increase in the number of parts can be suppressed compared to a case in which parts constituting the outer biasing means EN are separately prepared, because a part of the housing HS is used as the outer biasing means EN.

[0170] 25, the protrusion 3S may be provided on the support member 3. The outer guide portion EG (the bottom plate portion 4D of the lower cover member 4L) may be made of a metal plate.

[0171] This configuration brings about the effect of improving the durability of the lens driving device 101 compared to a case in which the outer guide portion EG is made of a material other than a metal plate, such as synthetic resin.

[0172] In addition, the first driving unit DM1 may be configured to have a lower shape memory alloy wire SAD as a plurality of separate shape memory alloy wires that move the lens holding member 2 in the optical axis direction relative to the support member 3, as shown in Figure 3.

[0173] This configuration brings about the effect of realizing a reduction in weight of the lens driving device 101 compared to the case where the first driving unit DM1 uses other driving means such as a voice coil motor.

[0174] The preferred embodiments of the present invention have been described above in detail. However, the present invention is not limited to the above-described embodiments. Various modifications and substitutions may be applied to the above-described embodiments without departing from the scope of the present invention. Furthermore, each of the features described with reference to the above-described embodiments may be appropriately combined as long as there is no technical contradiction.

[0175] For example, in the above-described embodiment, the contact between the inner guiding portion IG and the inner guided portion IGD is achieved by contact between metal and synthetic resin, but it may also be achieved by contact between metals or between synthetic resins. [Explanation of symbols]

[0176] REFERENCE SIGNS LIST 1...Fixed support member 1B...Base 1D...Leg 1D1...First leg 1D2...Second leg 1D3...Third leg 1D4...Fourth leg 1K...Opening 1P, 1Q, 1R...Convex part 2...Lens holding member 2D...Pedestal 2D1...First seat 2D2...Second seat 2K...Opening 2P...Convex part 2Q...Convex part 2R...Concave 2R1...First recess 2R2...Second recess 2V...Groove 2VB...Rear groove 2VF...Front groove 3...Support member 3K...Opening 3P...Convex part 3Q...Convex part 3R...Convex portion 3S...Protruding portion 3S1...First protruding portion 3S2...Second protruding portion 3S3...Third protruding portion 3S4...Fourth protruding portion 3T...Groove portion 3T1...First groove portion 3T2...Second groove portion 3U...Recessed portion 3U1...First recessed portion 3U2...Second recessed portion 3V...Groove portion 3W...Recessed portion 3W1...First recessed portion 3W2...Second recessed portion 4...Cover member 4A...First outer peripheral wall portion 4A1...First side plate portion 4A2...Second side plate portion 4A3...Third side plate portion 4A4...Fourth side plate portion 4B...Top plate portion 4C...Second outer peripheral wall portion 4C1...First side plate portion 4C2...Second side plate portion 4C3...Third side plate portion 4C4...Fourth side plate portion 4D...Bottom plate portion 4K...Opening 4L...Lower cover member 4M...Opening 4S...Storage section 4U...Upper cover member 5...Metal member 5A...First shape metal member 5B...Second shape metal member 5F...Fixed side metal member 5F1...First fixed side terminal plate 5F2...Second fixed side terminal plate 5F3...Third fixed side terminal plate 5F4...Fourth fixed side terminal plate 5H1...First through hole 5H2...Second through hole 5H3...Third through hole 5L...Lens side metal member 5L1...First lens side terminal plate 5L2...Second lens side terminal plate 5M...Movable side metal part 5M1...First movable side terminal plate 5M2...Second movable side terminal plate 5M3...Third movable side terminal plate 5M4...Fourth movable side terminal plate 5S...Support side metal part 5S1...First support side terminal plate 5S2...Second support side terminal plate5S3 ··· The 3rd support-side terminal plate 5S4 ··· The 4th support-side terminal plate 6 ··· Flexible metal member 6E ··· Support fixing part 6E1 ··· The 1st support fixing part 6E2 ··· The 2nd support fixing part 6E3 ··· The 3rd support fixing part 6G ··· Flexible arm part 6G1 ··· The 1st flexible arm part 6G2 ··· The 2nd flexible arm part 6H1 ··· The 1st through hole 6H2 ··· The 2nd through hole 6H3 ··· The 3rd through hole 6N ··· Base fixing part 6N1 ··· The 1st base fixing part 6N2 ··· The 2nd base fixing part 7 ··· Guide member 7B ··· Rear guide member 7F ··· Front guide member 8 ··· Magnet 8B ··· Rear magnet 8F ··· Front magnet 9 ··· The 1st magnetic member 9B ··· The 1st rear magnetic member 9F ··· The 1st front magnetic member 10 ··· The 2nd magnetic member 10B ··· The 2nd rear magnetic member 10F ··· The 2nd front magnetic member 11 ··· Yoke 11B ··· Rear yoke 11F ··· Front yoke 12 ··· Cylindrical part 71 ··· The 1st ball 72 ··· The 2nd ball 73 ··· The 3rd ball 101, 101A ··· Lens driving device CD ··· Lower conductive member CD1 ··· The 1st lower conductive member CD2 ··· The 2nd lower conductive member CD3 ··· The 3rd lower conductive member CD4 ··· The 4th lower conductive member CD5 ··· The 5th lower conductive member CM ··· Camera module CN ··· Conductive member CS ··· Joint surface part CS1 ··· The 1st joint surface part CS2 ··· The 2nd joint surface part CS3 ··· The 3rd joint surface part CS4 ··· The 4th joint surface part CS5 ··· The 5th joint surface part CS6 ··· The 6th joint surface part CS7 ··· The 7th joint surface part CS8 ··· The 8th joint surface part CS9 ··· The 9th joint surface part CS10 ··· The 10th joint surface part CT ··· Joint surface part CT1 ··· The 1st joint surface part CT2 ··· The 2nd joint surface part CU ··· Upper conductive member CU1 ··· The 1st upper conductive member CU2 ··· The 2nd upper conductive member CU3 ··· The 3rd upper conductive member CU4 ··· The 4th upper conductive member CU5 ··· The 5th upper conductive member CU6 ··· The 6th upper conductive member CU7 ··· The 7th upper conductive member CU8 ··· The 8th upper conductive member CU9 ··· The 9th upper conductive member CU10 ··· The 10th upper conductive member DM ··· Driving part DM1 ··· The 1st driving part DM2 ··· The 2nd driving part EG ··· Outer guide EG1 ··· The 1st outer guide EG2 ··· The 2nd outer guide EG3 ··· The 3rd outer guideEG4...Fourth outer guide part EGD...Outer guided part EN...Outer biasing means EX...Exposed part EX3...Third exposed part EX5...Fifth exposed part FB...Fixed side member H1...First through hole H2...Second through hole H3...Third through hole H4...Fourth through hole H5...Fifth through hole H6...Sixth through hole HS...Housing IG...Inner guiding part IGD...Inner guided part IN...Inner biasing means IS...Image sensor J1, J2, J11~J14...Holding part LS...Lens body MB...Movable side member MN...Main body part NP...Narrow width part OA...Optical axis RT...Routing part RT10...10th routing part SA...shape memory alloy wire SAD···Lower shape memory alloy wire SAD1···First lower wire SAD2···Second lower wire SAD3···Third lower wire SAD4···Fourth lower wire SAU···Upper shape memory alloy wire SAU1···First upper wire SAU2···Second upper wire SAU3···Third upper wire SAU4···Fourth upper wire TM···External terminal TM1···First external terminal TM2···Second external terminal TM3···Third external terminal TM4···Fourth external terminal TM5···Fifth external terminal TM6···Sixth external terminal TM7···Seventh external terminal TM8···Eighth external terminal TM9···Ninth external terminal TM10···Tenth external terminal WP···Wide section

Claims

1. A fixed member; a lens holding member having a cylindrical portion capable of holding a lens body disposed opposite the imaging element; a support member that is movable relative to the fixed member in a direction intersecting an optical axis direction of the lens body and is provided outside the lens holding member; a first drive unit that moves the lens holding member in an optical axis direction relative to the support member; a second driving unit having a plurality of shape memory alloy wires that move the support member in a direction intersecting with an optical axis direction relative to the fixed member, the shape memory alloy wire is disposed closer to the subject than the first driving unit; A lens driving device comprising:

2. Each of the plurality of shape memory alloy wires is disposed on the outside of the cylindrical portion of the lens holding member in a plan view along the optical axis direction, and has one end fixed to a fixed-side metal member formed of a metal plate provided on the fixed-side member, and the other end fixed to a movable-side metal member formed of a metal plate provided on the support member. The lens driving device according to claim 1 .

3. The plurality of shape memory alloy wires include four shape memory alloy wires arranged to surround the cylindrical portion of the lens holding member in a plan view along the optical axis direction, Each of the four shape memory alloy wires has one end fixed to a fixed-side metal member formed of a metal plate provided on the fixed-side member, and the other end fixed to a movable-side metal member formed of a metal plate provided on the support member, The plate surfaces of the fixed metal member and the movable metal member are substantially perpendicular to the optical axis. The lens driving device according to claim 1 .

4. the eight metal members including the fixed-side metal member and the movable-side metal member are composed of four first-shape metal members having a first shape and four second-shape metal members having a second shape, The shape memory alloy wire is provided between the first shape metal member and the second shape metal member. The lens driving device according to claim 3 .

5. the fixed member includes a fixed support member having a plurality of conductive members embedded therein; the plurality of conductive members include the conductive member electrically connected to the fixed metal member, the fixed support member has a base portion disposed on a subject side of the support member and a plurality of legs extending downward from an outer periphery of the base portion, At least a portion of the plurality of shape memory alloy wires are disposed above the base. The lens driving device according to claim 2 .

6. the fixed-side member includes a housing in which the fixed support member is housed, the conductive member that is electrically connected to the fixed-side metal member has a joint surface portion exposed from the base portion and connected to the fixed-side metal member, an external terminal portion exposed to the outside of the housing, and a wiring portion that is provided between the joint surface portion and the external terminal portion and is embedded inside the fixed support member, The external terminal portion is exposed from a lower portion of the leg portion.

6. The lens driving device according to claim 5.

7. the plurality of conductive members include the conductive member that is electrically connected to the movable-side metal member, A part of the conductive member that is electrically connected to the movable-side metal member constitutes the external terminal portion that is exposed from a lower portion of the leg portion.

7. The lens driving device according to claim 6.

8. the fixed member has an outer guide portion that guides the movement of the support member in a direction perpendicular to the optical axis direction, the support member has an outer guided portion that slides on the outer guide portion and is guided by the outer guide portion, one of the outer guiding portion and the outer guided portion has a plurality of protruding portions protruding toward the other of the outer guiding portion and the outer guided portion, an outer biasing means for applying a force that attracts the other of the outer guiding portion and the outer guided portion and the protruding portion to each other; 6. The lens driving device according to claim 1.

9. The outer biasing means is constituted by a magnet provided on the support member and a magnetic metal member constituting the fixed member. The lens driving device according to claim 8.

10. the fixed member has a housing capable of accommodating the support member, At least a portion of the housing is formed of a magnetic metal, The magnetic metal member is formed by at least a part of the housing. The lens driving device according to claim 9.

11. The protrusion is provided on the support member, The outer guide portion is made of a metal plate. The lens driving device according to claim 8.

12. The first driving unit includes a plurality of other shape memory alloy wires that move the lens holding member in the optical axis direction relative to the support member. The lens driving device according to claim 1 .

13. The lens driving device according to claim 1 , the lens body held by the lens holding member; An imaging element disposed opposite the lens body, Camera module.

Images