Optical component driving device and camera module

Abstract

An optical component drive device comprises: a cover member (3) having a top plate part (3B) that is opposite from a base member (8) in the vertical direction and an upper outer peripheral wall part (3A) that includes a plurality of upper side plate parts which extend downward from the outer edge part of the top plate part (3B); and a plurality of shape memory alloy wires (SA) disposed inward of the upper outer peripheral wall part (3A). A fixed-side member (FB) includes a case member (4) which accommodates the base member (8) and an upper part of which is open. The case member (4) has a bottom plate part (4B) that is disposed below the base member (8) and a lower outer peripheral wall part (4A) that includes a plurality of lower side plate parts which extend upward from the outer edge part of the bottom plate part (4B). The lower side plate parts are positioned between the shape memory alloy wires (SA) and the upper side plate parts constituting the upper outer peripheral wall part (3A) of the cover member (3), and are opposite from the shape memory alloy wires (SA).

Description

[Technical Field]

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

[0002] BACKGROUND ART Conventionally, there is known a device that uses a shape memory alloy wire to drive a lens within a housing that is configured with a base member and a cover member (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2018 / 0149142 Summary of the Invention [Problem to be solved by the invention]

[0004] The shape memory alloy wire used in the above-mentioned device is in a slack state when no current is flowing. Therefore, for example, when assembling the cover member to the base member, there is a risk that the shape memory alloy wire will be pinched between the cover member and the base member. Therefore, it is desirable to provide an optical component driving device that can prevent the shape memory alloy wire from being pinched between the base member and the cover member. [Means for solving the problem]

[0005] An optical component driving device according to an embodiment of the present disclosure includes: a base member; an optical component holding member having an opening penetrating in the vertical direction in which an optical component can be arranged and being movably provided with respect to the base member; a cover member having a top plate portion facing the base member in the vertical direction with the optical component holding member sandwiched therebetween and an upper outer peripheral wall portion including a plurality of upper side plate portions extending downward from an outer edge of the top plate portion; and a cover member disposed inside the upper outer peripheral wall portion, one end of which is fixed to a fixed-side member including the base member and the other end of which is fixed to a movable-side member including the optical component holding member, and a plurality of shape memory alloy wires that move an optical component holding member relative to the base member, wherein the fixed-side member includes a case member that is open at the top and that houses the base member, the case member having a bottom plate portion that is disposed below the base member and a lower outer peripheral wall portion that includes a plurality of lower side plate portions that extend upward from the outer edge of the bottom plate portion, the lower side plate portions being positioned between the shape memory alloy wires and the upper side plate portions that constitute the upper outer peripheral wall portion of the cover member, and facing the shape memory alloy wires. a first point at which the one end of the shape memory alloy wire is fixed to the fixed-side member and a second point at which the other end of the shape memory alloy wire is fixed to the movable-side member are at different heights in the vertical direction, and the lower side plate portion extends to a position higher than the midpoint between the first point and the second point. There are. [Effects of the Invention]

[0006] The optical element driving device described above can prevent the shape memory alloy wire from being pinched between the base member and the cover member. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view of the lens driving device. [Figure 2] FIG. 2 is an exploded perspective view of the lens driving device. [Figure 3] FIG. 2 is a perspective view of a lens holding member to which various members are attached. [Figure 4] FIG. 2 is a perspective view of a base member to which various members are attached. [Figure 5] FIG. 2 is a front view of a metal member and a shape memory alloy wire. [Figure 6] FIG. 2 is a left side view of the metal member and the shape memory alloy wire. [Figure 7] FIG. 2 is a perspective view of a metal member, a leaf spring, a conductive member, and a shape memory alloy wire. [Figure 8] 1 is a diagram showing an example of a path of a current flowing through a shape memory alloy wire. [Figure 9] 10A and 10B are diagrams showing another example of a path of current flowing through a shape memory alloy wire. [Figure 10] FIG. 10 is a diagram showing yet another example of a path of current flowing through a shape memory alloy wire. [Figure 11] FIG. 10 is a diagram showing yet another example of a path of current flowing through a shape memory alloy wire. [Figure 12] 10A and 10B are diagrams illustrating examples of paths of current flowing through an inner leaf spring. [Figure 13] FIG. 2 is a top view of the case member, the metal member, and the base member. [Figure 14] FIG. 2 is a front view of the lens driving device. [Figure 15] FIG. 2 is a left side view of the lens driving device. [Figure 16] FIG. 4 is a top view of a first fixing portion of the base member. [Figure 17] FIG. 10 is a top view of a second fixing portion of the base member. [Figure 18] FIG. 2 is a front view of the case member, the metal member, and the shape memory alloy wire. [Figure 19] FIG. [Figure 20] FIG. [Figure 21] FIG. 1 is a perspective view of a leaf spring made from a workpiece. [Figure 22] FIG. 2 is a perspective view of a portion of a removal portion constituting a workpiece. DETAILED DESCRIPTION OF THE INVENTION

[0008] A lens driving device 100, which is an example of an optical component driving device according to an embodiment of the present disclosure, will be described below with reference to the drawings. Fig. 1 is a perspective view of the lens driving device 100. Specifically, the upper view of Fig. 1 is a top perspective view of the lens driving device 100, and the lower view of Fig. 1 is a bottom perspective view of the lens driving device 100. Fig. 2 is an exploded perspective view of the lens driving device 100.

[0009] In FIG. 1, X1 represents one direction of the X axis constituting a three-dimensional Cartesian coordinate system, and X2 represents the other direction of the X axis. Y1 represents one direction of the Y axis constituting the three-dimensional Cartesian coordinate system, and Y2 represents the other direction of the Y axis. Z1 represents one direction of the Z axis constituting the three-dimensional Cartesian coordinate system, and Z2 represents the other direction of the Z axis. In FIG. 1, the center point of the lens driving device 100 is used as the reference, and the X1 side of the lens driving device 100 corresponds to the front side (front face side) of the lens driving device 100, and the X2 side of the lens driving device 100 corresponds to the rear side (rear face side) of the lens driving device 100. The Y1 side of the lens driving device 100 corresponds to the left side of the lens driving device 100, and the Y2 side of the lens driving device 100 corresponds to the right side of the lens driving device 100. The Z1 side of the lens driving device 100 corresponds to the upper side (subject side) of the lens driving device 100, and the Z2 side of the lens driving device 100 corresponds to the lower side (image sensor side) of the lens driving device 100. The "outside" means the side farther from the reference point than the "inside". The same applies to other members in other figures.

[0010] The lens driving device 100 is a device that drives a lens body LS, which is an example of an optical component. For clarity, in FIG. 2, only the outline of the lens body LS is shown by a dashed line. The lens driving device 100, the lens body LS held by a lens holding member 2 of the lens driving device 100, and the image sensor IS arranged to face the lens body LS constitute a camera module, which is an example of an optical module. An IR cut filter may be arranged between the lens body LS and the image sensor IS. The optical component may be an optical module (camera module). In this case, the optical component driving device functions as an optical module driving device. Alternatively, the optical component may be an image sensor IS. In this case, the optical component driving device functions as an image sensor driving device.

[0011] 1 and 2, the lens driving device 100 includes a cover member 3 and a case member 4. The cover member 3 and the case member 4 are configured to function as a housing HS that covers each of the components. In the illustrated example, the cover member 3 is made of a non-magnetic metal, and the case member 4 is made of a magnetic metal. However, the cover member 3 may be made of a magnetic metal, and the case member 4 may be made of a non-magnetic metal.

[0012] The cover member 3 has a generally rectangular cylindrical upper outer peripheral wall portion 3A and a generally rectangular annular flat top plate portion 3B provided so as to be continuous with the upper end (the end on the Z1 side) of the upper outer peripheral wall portion 3A. A generally circular opening 3K is formed in the center of the top plate portion 3B. In the illustrated example, the top plate portion 3B is flat (flat) and has no irregularities, but it may have irregularities or steps.

[0013] The upper outer peripheral wall 3A includes a first upper side plate 3A1 to a fourth upper side plate 3A4. The first upper side plate 3A1 and the third upper side plate 3A3 face each other, and the second upper side plate 3A2 and the fourth upper side plate 3A4 face each other. The first upper side plate 3A1 and the third upper side plate 3A3 extend perpendicular to the second upper side plate 3A2 and the fourth upper side plate 3A4. The upper outer peripheral wall 3A includes an upper corner plate 3C located between two adjacent upper side plates. Specifically, the upper outer peripheral wall portion 3A includes a first upper corner plate portion 3C1 located between the first upper side plate portion 3A1 and the fourth upper side plate portion 3A4, a second upper corner plate portion 3C2 located between the first upper side plate portion 3A1 and the second upper side plate portion 3A2, a third upper corner plate portion 3C3 located between the second upper side plate portion 3A2 and the third upper side plate portion 3A3, and a fourth upper corner plate portion 3C4 located between the third upper side plate portion 3A3 and the fourth upper side plate portion 3A4.

[0014] The case member 4 has a substantially rectangular cylindrical lower outer peripheral wall portion 4A and a substantially rectangular annular flat bottom plate portion 4B provided so as to be continuous with the lower end (the end on the Z2 side) of the lower outer peripheral wall portion 4A. A substantially circular opening 4K is formed in the center of the bottom plate portion 4B. In the illustrated example, the bottom plate portion 4B is flat (flat) and has no irregularities, but it may have irregularities or steps.

[0015] The lower outer peripheral wall 4A includes a first lower side plate 4A1 to a fourth lower side plate 4A4. The first lower side plate 4A1 and the third lower side plate 4A3 face each other, and the second lower side plate 4A2 and the fourth lower side plate 4A4 face each other. The first lower side plate 4A1 and the third lower side plate 4A3 extend perpendicular to the second lower side plate 4A2 and the fourth lower side plate 4A4. The lower outer peripheral wall 4A also includes a lower corner plate 4C located between two adjacent lower side plates. Specifically, the lower outer peripheral wall portion 4A includes a first lower corner plate portion 4C1 located between the first lower side plate portion 4A1 and the fourth lower side plate portion 4A4, a second lower corner plate portion 4C2 located between the first lower side plate portion 4A1 and the second lower side plate portion 4A2, a third lower corner plate portion 4C3 located between the second lower side plate portion 4A2 and the third lower side plate portion 4A3, and a fourth lower corner plate portion 4C4 located between the third lower side plate portion 4A3 and the fourth lower side plate portion 4A4.

[0016] The cover member 3 is joined to the case member 4 with an adhesive. The upper outer peripheral wall portion 3A is combined with the lower outer peripheral wall portion 4A so as to partially cover the lower outer peripheral wall portion 4A. The adhesive may be a moisture-curing adhesive, a heat-curing adhesive, a light-curing adhesive, or a combination thereof. The same applies to the adhesives described below.

[0017] As shown in FIG. 2, the housing HS accommodates a plate member 1, a lens holding member 2, a metal member 5, a leaf spring 6, a base member 8, a shape memory alloy wire SA, and the like.

[0018] The movable member MB includes a lens holding member 2 that can hold a lens body LS. The lens body LS is, for example, a cylindrical lens barrel equipped with at least one lens, and is configured so that its central axis is aligned with the optical axis OA. The fixed member FB includes a plate-like member 1, a cover member 3, a case member 4, and a base member 8.

[0019] The lens holding member 2 is an example of an optical component holding member, and is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP). Specifically, as shown in FIG. 2, the lens holding member 2 includes a cylindrical portion 2P formed to extend along the optical axis OA, and a movable-side base portion 2D and a protruding portion 2S formed to protrude radially outward from the cylindrical portion 2P. In the illustrated example, the lens body LS is configured to be fixed to the inner circumferential surface of the cylindrical portion 2P with an adhesive. That is, the inside of the cylindrical portion 2P is formed with an opening 2K penetrating in the up-down direction (Z-axis direction), and at least a portion of the lens body LS is configured to be disposed in the opening 2K.

[0020] The movable-side pedestal portion 2D includes a first movable-side pedestal portion 2D1 and a second movable-side pedestal portion 2D2. The first movable-side pedestal portion 2D1 and the second movable-side pedestal portion 2D2 are arranged to protrude in opposite directions relative to each other across the optical axis OA. Similarly, the protruding portion 2S includes a first protruding portion 2S1 and a second protruding portion 2S2. The first protruding portion 2S1 and the second protruding portion 2S2 are arranged to protrude in opposite directions relative to each other across the optical axis OA. Specifically, the movable-side pedestal portion 2D and the protruding portions 2S are arranged to correspond to the four corners of the lens holding member 2, which has a substantially rectangular outer shape in a top view, and are arranged alternately. A portion of the leaf spring 6 is placed on each of the two movable-side pedestals 2D.

[0021] The shape memory alloy wire SA is an example of a shape memory actuator. In the illustrated example, the shape memory alloy wire SA includes a first wire SA1 to an eighth wire SA8 having approximately the same length and approximately the same diameter. When a current flows through the shape memory alloy wire SA, the temperature rises and the shape memory alloy wire SA contracts in response to the rise in temperature. Note that the shape memory alloy wire SA is in a slack state in its initial state. The initial state is a state in which no power is supplied to the drive unit DM and no current flows through the shape memory alloy wire SA.

[0022] The driving unit DM is configured to include a shape memory alloy wire SA. In the illustrated example, the driving unit DM can move the lens holding member 2 relative to the base member 8 by utilizing the contraction of the shape memory alloy wire SA. In the illustrated example, the driving unit DM is configured such that when one or more of the first wire SA1 to the eighth wire SA8 contract, the lens holding member 2 moves, and this movement causes another one or more of the first wire SA1 to the eighth wire SA8 to be stretched (elongated).

[0023] The leaf spring 6 is made from 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). In the illustrated example, the leaf spring 6 is made by press working and includes an outer leaf spring 6A and an inner leaf spring 6B. The outer leaf spring 6A includes a first outer leaf spring 6A1 and a second outer leaf spring 6A2. The inner leaf spring 6B includes a first inner leaf spring 6B1 to a fourth inner leaf spring 6B4. Note that in the illustrated example, the inner leaf spring 6B is separated into four sections (the first inner leaf spring 6B1 to the fourth inner leaf spring 6B4), but at least two of the four sections may be connected.

[0024] In the illustrated example, the outer leaf spring 6A and the inner leaf spring 6B are each configured to function as a conductive path. Specifically, the outer leaf spring 6A is configured to be electrically connected to the shape memory alloy wire SA through the metal member 5. The inner leaf spring 6B is configured to be electrically connected to an electrical device, such as a variable diaphragm device, attached to the lens holding member 2. In other words, each of the first inner leaf spring 6B1 to the fourth inner leaf spring 6B4 is configured to be electrically connected to an electrode terminal of an electrical device that moves together with the lens holding member 2. Note that a plurality of electrical devices may be attached to the lens holding member 2.

[0025] The plate-shaped member 1 is an example of an insulating member IM that electrically insulates each of the plurality of plate springs 6 (first outer plate spring 6A1, second outer plate spring 6A2, and first inner plate spring 6B1 to fourth inner plate spring 6B4). In the illustrated example, the plate-shaped member 1 is a plate-shaped metal member, and is fixed to the underside of the top plate portion 3B of the cover member 3. An insulating coating agent is applied to the underside of the plate-shaped member 1, which is the surface facing the plate springs 6.

[0026] With this configuration, the plate-shaped member 1 can prevent contact between the cover member 3 and the leaf springs 6. Therefore, the plate-shaped member 1 can prevent two of the plurality of leaf springs 6 from becoming electrically connected (short-circuited) through the cover member 3.

[0027] In the illustrated example, the plate-like member 1 has an upper plate portion 1B facing the top plate portion 3B of the cover member 3, and four bent portions 1A (first bent portion 1A1 to fourth bent portion 1A4) bent downward from the outer edge of the upper plate portion 1B. An insulating coating agent is applied to the inner surfaces of the four bent portions 1A (first bent portion 1A1 to fourth bent portion 1A4).

[0028] Each of the four bent portions 1A faces a corresponding side plate portion (first to fourth upper side plate portions 3A1 to 3A4) of the cover member 3. Specifically, the first bent portion 1A1 faces and contacts the first upper side plate portion 3A1, the second bent portion 1A2 faces and contacts the second upper side plate portion 3A2, the third bent portion 1A3 faces and contacts the third upper side plate portion 3A3, and the fourth bent portion 1A4 faces and contacts the fourth upper side plate portion 3A4.

[0029] Furthermore, the plate-like member 1 is fixed to the underside (ceiling surface) of the cover member 3 by a conductive adhesive AD1 and an insulating adhesive AD2. In Fig. 2, for clarity, a cross pattern is applied to the conductive adhesive AD1, and a diagonal line pattern is applied to the insulating adhesive AD2.

[0030] The base member 8 is formed by injection molding using a synthetic resin such as liquid crystal polymer (LCP). In the illustrated example, the base member 8 has a substantially rectangular outline when viewed from above, and has an opening 8K in the center. Specifically, the base member 8 has four sides 8E (first side 8E1 to fourth side 8E4) that are arranged to surround the opening 8K.

[0031] The leaf spring 6 is configured to connect a movable-side pedestal portion 2D formed on the lens holding member 2 and a fixed-side pedestal portion 8D formed on the base member 8. The fixed-side pedestal portion 8D includes a first fixed-side pedestal portion 8D1 and a second fixed-side pedestal portion 8D2.

[0032] More specifically, the first outer leaf spring 6A1 is configured to connect the first movable-side pedestal portion 2D1 formed on the lens holding member 2 to each of the first fixed-side pedestal portion 8D1 and second fixed-side pedestal portion 8D2 formed on the base member 8. The second outer leaf spring 6A2 is configured to connect the second movable-side pedestal portion 2D2 formed on the lens holding member 2 to each of the first fixed-side pedestal portion 8D1 and second fixed-side pedestal portion 8D2 formed on the base member 8.

[0033] The first inner leaf spring 6B1 is configured to connect the first movable-side pedestal portion 2D1 formed on the lens holding member 2 to the first fixed-side pedestal portion 8D1 formed on the base member 8. The second inner leaf spring 6B2 is configured to connect the first movable-side pedestal portion 2D1 formed on the lens holding member 2 to the second fixed-side pedestal portion 8D2 formed on the base member 8. The third inner leaf spring 6B3 is configured to connect the second movable-side pedestal portion 2D2 formed on the lens holding member 2 to the second fixed-side pedestal portion 8D2 formed on the base member 8. The fourth inner leaf spring 6B4 is configured to connect the second movable-side pedestal portion 2D2 formed on the lens holding member 2 to the first fixed-side pedestal portion 8D1 formed on the base member 8.

[0034] The metal member 5 is configured so that an end of the shape memory alloy wire SA is fixed thereto. In the illustrated example, the metal member 5 includes a fixed-side metal member 5F and a movable-side metal member 5M. The fixed-side metal member 5F constitutes a part of the fixed-side member FB, and is configured so as to be fixed to the fixed-side pedestal portion 8D of the base member 8. The movable-side metal member 5M constitutes a part of the movable-side member MB, and is configured so as to be fixed to the movable-side pedestal portion 2D of the lens holding member 2.

[0035] More specifically, the fixed metal member 5F is also referred to as a fixed terminal plate and includes a first fixed terminal plate 5F1 to an eighth fixed terminal plate 5F8, and the movable metal member 5M is also referred to as a movable terminal plate and includes a first movable terminal plate 5M1 to a fourth movable terminal plate 5M4.

[0036] The shape memory alloy wires SA extend along the inner surface IF of the lower outer peripheral wall portion 4A of the case member 4, and are configured to be able to move the movable-side member MB relative to the fixed-side member FB. In the illustrated example, the shape memory alloy wires SA include a first wire SA1 to an eighth wire SA8, and are configured to be able to movably support the lens holding member 2 as the movable-side member MB relative to the base member 8 as the fixed-side member FB. As shown in FIG. 2, each of the first wire SA1 to the eighth wire SA8 has one end fixed to the fixed-side metal member 5F by crimping, welding, etc., and the other end fixed to the movable-side metal member 5M by crimping, welding, etc.

[0037] The base member 8 is configured to function as a wire support member that supports one end of each of the first wire SA1 to the eighth wire SA8. With this configuration, the drive unit DM can, in principle, achieve six degrees of freedom of movement of the lens holding member 2 by extending and contracting each of the first wire SA1 to the eighth wire SA8. The six degrees of freedom of movement include translation along the X axis, translation along the Y axis, translation along the Z axis, rotation around the X axis, rotation around the Y axis, and rotation around the Z axis.

[0038] Next, various members attached to the lens holding member 2 and the base member 8 will be described with reference to Figures 3 and 4. Figure 3 is a perspective view of the lens holding member 2 to which various members are attached. Figure 4 is a perspective view of the base member 8 to which various members are attached.

[0039] 3, the first movable-side terminal plate 5M1 is fixed to the X1-side sidewall of the first movable-side pedestal portion 2D1. Specifically, the first movable-side terminal plate 5M1 is fixed to the first movable-side pedestal portion 2D1 with an adhesive in a state in which a rectangular hole formed in the first movable-side terminal plate 5M1 engages with a prismatic protrusion formed on the first movable-side pedestal portion 2D1 that protrudes outward (toward the X1 side). Similarly, the second movable-side terminal plate 5M2 is fixed to the Y1-side sidewall of the first movable-side pedestal portion 2D1, the third movable-side terminal plate 5M3 is fixed to the X2-side sidewall of the second movable-side pedestal portion 2D2, and the fourth movable-side terminal plate 5M4 is fixed to the Y2-side sidewall of the second movable-side pedestal portion 2D2.

[0040] As shown in Fig. 4, the first fixed-side terminal plate 5F1 and the second fixed-side terminal plate 5F2 are fixed to the X1-side side wall of the first fixed-side pedestal portion 8D1. Specifically, the first fixed-side terminal plate 5F1 and the second fixed-side terminal plate 5F2 are fixed to the first fixed-side pedestal portion 8D1 with an adhesive. More specifically, the first fixed-side terminal plate 5F1 is fixed to the first fixed-side pedestal portion 8D1 with an adhesive in a state in which a protrusion formed on the first fixed-side pedestal portion 8D1 that protrudes outward (toward the X1 side) is engaged with a through-hole formed in the first fixed-side terminal plate 5F1. The same is true for the second fixed-side terminal plate 5F2. Similarly, the third fixed side terminal plate 5F3 and the fourth fixed side terminal plate 5F4 are fixed to the Y1 side wall of the second fixed side pedestal portion 8D2 of the base member 8, the fifth fixed side terminal plate 5F5 and the sixth fixed side terminal plate 5F6 are fixed to the X2 side wall of the second fixed side pedestal portion 8D2 of the base member 8, and the seventh fixed side terminal plate 5F7 and the eighth fixed side terminal plate 5F8 are fixed to the Y2 side wall of the first fixed side pedestal portion 8D1 of the base member 8.

[0041] 4, conductive members CM made of metal plates containing a material such as copper, iron, or an alloy containing these as a main component are embedded in the base member 8 by insert molding. In the illustrated example, the conductive members CM are made of a magnetic metal and include a first conductive member CM1 to a tenth conductive member CM10.

[0042] Through holes 4H (see FIG. 2) are formed in the lower end of the lower outer peripheral wall 4A of the case member 4 to expose the terminal portions of the conductive members CM. Specifically, the through holes 4H include a first through hole 4H1 formed in the center of the lower end of the first lower side plate 4A1 and a second through hole 4H2 formed in the center of the lower end of the third lower side plate 4A3. The first through hole 4H1 is formed to expose the respective terminal portions of the first conductive member CM1 to the fifth conductive member CM5, the first fixed-side terminal plate 5F1, and the second fixed-side terminal plate 5F2. The second through hole 4H2 is formed to expose the respective terminal portions of the sixth conductive member CM6 to the tenth conductive member CM10, the fifth fixed-side terminal plate 5F5, and the sixth fixed-side terminal plate 5F6.

[0043] 3 and 4, a vibration-damping member DP is attached between the lens holding member 2 and the base member 8. The vibration-damping member DP is a member for suppressing vibration of the lens holding member 2. In the illustrated example, the vibration-damping member DP is a liquid adhesive that is applied between a receiving surface 2V (see FIG. 3) formed on the outer wall of the cylindrical portion 2P of the lens holding member 2 and a receiving surface 8V (see FIG. 4) formed on the inner wall of the fixed-side pedestal portion 8D of the base member 8, and that has been gelled by hardening or semi-hardening.

[0044] As shown in FIG. 3, a magnet MG is attached to the lens holding member 2. The magnet MG is used to position the lens holding member 2 when the lens holding member 2 is in its initial state (initial position). The initial state (initial position) of the lens holding member 2 is the state (position) of the lens holding member 2 when no power is supplied to the driving unit DM and no current flows through the shape memory alloy wire SA. Note that the initial state (initial position) of the lens holding member 2 may also be the neutral state (neutral position) of the lens holding member 2.

[0045] The neutral state of the lens holding member 2 refers to a state in which, when the lens body LS is translatable along the Z-axis direction relative to the housing HS of the lens driving device 100, the lens body LS is located in the middle of its movable range in the Z-axis direction. Typically, in the neutral state of the lens holding member 2, the lens body LS is located in the middle of its movable range in the Z-axis direction. The same applies to the cases in which the lens body LS is translatable along the X-axis direction, the Y-axis direction, the X-axis direction, the Y-axis direction, and the Z-axis direction. Note that in the illustrated example, the initial position of the lens holding member 2 in the Z-axis direction is located at the lowest position (Z2 side), and therefore the initial position of the lens holding member 2 in the Z-axis direction is different from the neutral position of the lens holding member 2 in the Z-axis direction.

[0046] Specifically, in the illustrated example, the magnets MG include a first magnet MG1 housed in a recess formed in the upper surface of the first protrusion 2S1 and a second magnet MG2 housed in a recess formed in the upper surface of the second protrusion 2S2. The lens holding member 2 is positioned at a neutral position in the X-axis direction and the Y-axis direction by a magnetic attractive force acting between the first magnet MG1 and a positioning plate LP (see FIG. 4) of the tenth conductive member CM10 embedded in the base member 8, and a magnetic attractive force acting between the second magnet MG2 and a positioning plate LP (see FIG. 4) of the third conductive member CM3 embedded in the base member 8. That is, when power is not supplied to the drive unit DM, the lens holding member 2 is moved to a neutral position in the X-axis direction and the Y-axis direction by the magnets MG so that the positioning plate LP of the tenth conductive member CM10 and the first magnet MG1 face each other, and the positioning plate LP of the third conductive member CM3 and the second magnet MG2 face each other. However, in the initial state, the lens holding member 2 is in contact with the upper surface of the base member 8, and is therefore not in a neutral position in the Z-axis direction. In the illustrated example, the case member 4 is made of a magnetic metal so that a magnetic attractive force acts between the bottom plate portion 4B and the magnet MG, i.e., so that the lens holding member 2 can be attracted downward. Conversely, the cover member 3 is made of a non-magnetic metal so that a magnetic attractive force does not act between the top plate portion 3B and the magnet MG, i.e., so that the lens holding member 2 is not attracted upward.

[0047] Each of the plurality of leaf springs 6 has a fixed support portion 6F fixed to the fixed side member FB, a movable support portion 6M fixed to the movable side member MB, and an elastically deformable elastic arm portion 6E arranged to connect the fixed support portion 6F and the movable support portion 6M.

[0048] Specifically, the first outer leaf spring 6A1 has a fixed support portion 6FA1 fixed to the fixed-side pedestal portion 8D, a movable support portion 6MA1 fixed to the movable-side pedestal portion 2D, and an elastic arm portion 6EA1 connecting the fixed support portion 6FA1 and the movable support portion 6MA1. The fixed support portion 6FA1 includes a fixed support portion 6FA11 fixed to the first fixed-side pedestal portion 8D1 and a fixed support portion 6FA12 fixed to the second fixed-side pedestal portion 8D2. The elastic arm portion 6EA1 includes an elastic arm portion 6EA11 connecting the fixed support portion 6FA11 and the movable support portion 6MA1, and an elastic arm portion 6EA12 connecting the fixed support portion 6FA12 and the movable support portion 6MA1.

[0049] The second outer leaf spring 6A2 has a fixed support portion 6FA2 fixed to the fixed-side pedestal 8D, a movable support portion 6MA2 fixed to the movable-side pedestal 2D, and an elastic arm portion 6EA2 connecting the fixed support portion 6FA2 and the movable support portion 6MA2. The fixed support portion 6FA2 includes a fixed support portion 6FA21 fixed to the first fixed-side pedestal 8D1 and a fixed support portion 6FA22 fixed to the second fixed-side pedestal 8D2. The elastic arm portion 6EA1 includes an elastic arm portion 6EA21 connecting the fixed support portion 6FA21 and the movable support portion 6MA2, and an elastic arm portion 6EA22 connecting the fixed support portion 6FA22 and the movable support portion 6MA2.

[0050] The fixed support portion 6FA11 has a circular through-hole through which a cylindrical protrusion 8U (see FIG. 4) formed on the first fixed-side pedestal portion 8D1 protruding upward is inserted, and a rectangular through-hole used for joining the first conductive member CM1. In the illustrated example, the fixed support portion 6FA11 and the protrusion 8U are fixed to each other by hot crimping or cold crimping the protrusion 8U. However, the fixed support portion 6FA11 and the protrusion 8U may also be fixed to each other by an adhesive. The fixed support portion 6FA11 and the first conductive member CM1 are joined by welding such as laser welding. However, the fixed support portion 6FA11 and the first conductive member CM1 may also be joined to each other by soldering, a conductive adhesive, or the like. The same applies to the fixed support portion 6FA22.

[0051] The fixed support portion 6FA12 has two circular through-holes through which two cylindrical protrusions 8U formed on the second fixed-side pedestal portion 8D2 protruding upward are inserted. In the illustrated example, the fixed support portion 6FA12 and the protrusions 8U are fixed to each other by hot crimping or cold crimping the protrusions 8U. However, the fixed support portion 6FA12 and the protrusions 8U may also be fixed to each other by an adhesive. The same applies to the fixed support portion 6FA21.

[0052] The movable support member 6MA1 has two through holes through which two cylindrical protrusions 2U (see FIG. 3) formed on the first movable-side pedestal 2D1 protruding upward are inserted. In the illustrated example, the movable support member 6MA1 and the protrusions 2U are fixed to each other by hot or cold caulking the protrusions 2U. However, the movable support member 6MA1 and the protrusions 2U may also be fixed to each other by an adhesive. The same applies to the movable support member 6MA2.

[0053] The first inner leaf spring 6B1 has a fixed support portion 6FB1 fixed to the first fixed-side pedestal 8D1, a movable support portion 6MB1 fixed to the first movable-side pedestal 2D1, and an elastic arm portion 6EB1 connecting the fixed support portion 6FB1 and the movable support portion 6MB1. The second inner leaf spring 6B2 has a fixed support portion 6FB2 fixed to the second fixed-side pedestal 8D2, a movable support portion 6MB2 fixed to the first movable-side pedestal 2D1, and an elastic arm portion 6EB2 connecting the fixed support portion 6FB2 and the movable support portion 6MB2. The third inner leaf spring 6B3 has a fixed support portion 6FB3 fixed to the second fixed-side pedestal 8D2, a movable support portion 6MB3 fixed to the second movable-side pedestal 2D2, and an elastic arm portion 6EB3 connecting the fixed support portion 6FB3 and the movable support portion 6MB3. The fourth inner leaf spring 6B4 has a fixed support portion 6FB4 fixed to the first fixed side base portion 8D1, a movable support portion 6MB4 fixed to the second movable side base portion 2D2, and an elastic arm portion 6EB4 connecting the fixed support portion 6FB4 and the movable support portion 6MB4.

[0054] The fixed support portion 6FB1 has through holes through which two cylindrical protrusions 8T (see FIG. 4) formed on the first fixed-side pedestal portion 8D1 protruding upward are inserted, and a rectangular through hole used for joining the second conductive member CM2. In the illustrated example, the fixed support portion 6FB1 and the protrusions 8T are fixed to each other by hot or cold caulking the protrusions 8T. However, the fixed support portion 6FB1 and the protrusions 8T may also be fixed to each other by an adhesive. The fixed support portion 6FB1 and the second conductive member CM2 are joined by welding such as laser welding. However, the fixed support portion 6FB1 and the second conductive member CM2 may also be joined to each other by soldering, a conductive adhesive, or the like. The same applies to the fixed support portions 6FB2 to 6FB4.

[0055] The movable support portion 6MB1 has two through holes formed therein, through which two cylindrical protrusions 2T (see FIG. 3) formed on the first movable-side pedestal portion 2D1 protruding upward are inserted. In the illustrated example, the movable support portion 6MB1 and the protrusions 2T are fixed together by hot caulking or cold caulking the protrusions 2T. However, the movable support portion 6MB1 and the protrusions 2T may also be fixed together with an adhesive. The same applies to the movable support portions 6MB2 to 6MB4.

[0056] 3 and 4, the protrusions 2T, 2U, 8T, and 8U are shown in a crushed state after being heat-stakingly secured. This is also true for the other figures. The crushed protrusions 2T, 2U, 8T, and 8U are also referred to as "stakingly secured portions."

[0057] The elastic arm portion 6EA1, the elastic arm portion 6EA2, and the elastic arm portions 6EB1 to 6EB4 are elastically deformable arms having a plurality of bends BP, so that the lens holding member 2 is movable relative to the base member 8 (fixed member FB) not only in a direction parallel to the optical axis OA but also in a direction intersecting the optical axis OA.

[0058] As shown in Figures 3 and 4, the first outer leaf spring 6A1 and the second outer leaf spring 6A2 have substantially the same shape. Specifically, the first outer leaf spring 6A1 and the second outer leaf spring 6A2 are configured to have two-fold rotational symmetry about the optical axis OA. The first inner leaf spring 6B1 and the third inner leaf spring 6B3 have substantially the same shape. Specifically, the first inner leaf spring 6B1 and the third inner leaf spring 6B3 are configured to have two-fold rotational symmetry about the optical axis OA. The second inner leaf spring 6B2 and the fourth inner leaf spring 6B4 have substantially the same shape. Specifically, the second inner leaf spring 6B2 and the fourth inner leaf spring 6B4 are configured to have two-fold rotational symmetry about the optical axis OA.

[0059] Such a configuration of the leaf spring 6 brings about the effect of reducing the number of parts of the lens driving device 100. Furthermore, the leaf spring 6 configured in this manner can support the lens holding member 2 in the air in a well-balanced manner, and does not adversely affect the weight balance of the movable-side member MB fixed to each of the eight shape memory alloy wires SA (first wire SA1 to eighth wire SA8).

[0060] Next, the metal member 5 to which the shape memory alloy wire SA is attached will be described with reference to FIGS. 5 and 6. FIG. 5 is a view of the first wire SA1 attached to the first movable terminal plate 5M1 and the first fixed terminal plate 5F1, respectively, and the second wire SA2 attached to the first movable terminal plate 5M1 and the second fixed terminal plate 5F2, respectively, as viewed from the X1 side. FIG. 6 is a view of the first wire SA1 attached to the first movable terminal plate 5M1 and the first fixed terminal plate 5F1, respectively, and the second wire SA2 attached to the first movable terminal plate 5M1 and the second fixed terminal plate 5F2, respectively, as viewed from the Y1 side. Note that the positional relationship of each component shown in FIGS. 5 and 6 corresponds to the positional relationship when the lens driving device 100 is assembled. For clarity, other components are omitted from FIGS. 5 and 6. Furthermore, the following description with reference to Figures 5 and 6 relates to the combination of the first wire SA1 and the second wire SA2, but it also applies to the combination of the third wire SA3 and the fourth wire SA4, the combination of the fifth wire SA5 and the sixth wire SA6, and the combination of the seventh wire SA7 and the eighth wire SA8.

[0061] Specifically, one end of the first wire SA1 is fixed to the first fixed terminal plate 5F1 at the holding portion J1 of the first fixed terminal plate 5F1, and the other end of the first wire SA1 is fixed to the first movable terminal plate 5M1 at the lower holding portion J2 of the first movable terminal plate 5M1. Similarly, one end of the second wire SA2 is fixed to the second fixed terminal plate 5F2 at the holding portion J3 of the second fixed terminal plate 5F2, and the other end of the second wire SA2 is fixed to the first movable terminal plate 5M1 at the upper holding portion J4 of the first movable terminal plate 5M1.

[0062] In the illustrated example, the holding portion J1 is formed by bending a portion of the first fixed-side terminal plate 5F1. Specifically, the holding portion J1 is formed by bending a portion of the first fixed-side terminal plate 5F1 while sandwiching one end of the first wire SA1. The one end of the first wire SA1 is fixed to the holding portion J1 by welding. The same applies to the holding portions J2 to J4.

[0063] The plate-shaped portions PM of the multiple metal members 5 are arranged parallel to one another. In the example shown in Fig. 6, the plate-shaped portion PM1 of the first fixed-side terminal plate 5F1, the plate-shaped portion PM2 of the second fixed-side terminal plate 5F2, and the plate-shaped portion PM11 of the first movable-side terminal plate 5M1 are arranged parallel to one another along the YZ plane. That is, the plate-shaped portions PM1, PM2, and PM11 are arranged parallel to one another along the inner surface IF of the lower outer peripheral wall portion 4A.

[0064] 5 and 6, the first wire SA1 and the second wire SA2 are arranged so as to be twisted relative to each other (so as to intersect three-dimensionally when viewed from the X1 side), that is, the first wire SA1 and the second wire SA2 are arranged so as not to come into contact with each other (are non-contacting).

[0065] Specifically, in a front view from the X1 side (see FIG. 5), the first wire SA1 is disposed so that one end (the fixed end) thereof is higher than the other end (the movable end), and the second wire SA2 is disposed so that the other end (the movable end) thereof is higher than the one end (the fixed end). Furthermore, the first wire SA1 and the second wire SA2 are disposed so that they intersect. Similarly, in a left side view from the Y1 side, the third wire SA3 is disposed so that one end thereof is higher than the other end, and the fourth wire SA4 is disposed so that the other end thereof is higher than the one end thereof. Furthermore, the third wire SA3 and the fourth wire SA4 are disposed so that they intersect. In a rear view from the X2 side, the fifth wire SA5 is disposed so that one end thereof is higher than the other end, and the sixth wire SA6 is disposed so that the other end thereof is higher than the one end thereof. Furthermore, the fifth wire SA5 and the sixth wire SA6 are disposed so that they intersect. When viewed from the right side Y2, the seventh wire SA7 is positioned so that one end is higher than the other end, and the eighth wire SA8 is positioned so that the other end is higher than the one end, and further, the seventh wire SA7 and the eighth wire SA8 are positioned so that they intersect.

[0066] That is, in a side view, the first wire SA1 to the eighth wire SA8 are all arranged so as to extend obliquely (non-parallel) to the X-axis and the Y-axis. However, the first wire SA1 and the second wire SA2 only need to be arranged so as to extend obliquely in a front view, and do not need to intersect with each other in a front view. The same applies to the relationship between the third wire SA3 and the fourth wire SA4, the relationship between the fifth wire SA5 and the sixth wire SA6, and the relationship between the seventh wire SA7 and the eighth wire SA8.

[0067] Next, the positional relationship between the metal member 5, the leaf spring 6, the conductive member CM, and the shape memory alloy wire SA will be described with reference to Fig. 7. Fig. 7 is a perspective view of the metal member 5, the leaf spring 6, the conductive member CM, and the shape memory alloy wire SA.

[0068] The first movable terminal plate 5M1 is vertically joined to the movable support portion 6MA1 of the first outer leaf spring 6A1 by a bonding material. The bonding material is, for example, solder or a conductive adhesive. That is, the first movable terminal plate 5M1 and the movable support portion 6MA1 are joined together with their surfaces substantially perpendicular to each other. Similarly, the second movable terminal plate 5M2 is vertically joined to the movable support portion 6MA1 of the first outer leaf spring 6A1 by a bonding material, and the third movable terminal plate 5M3 and the fourth movable terminal plate 5M4 are vertically joined to the movable support portion 6MA2 of the second outer leaf spring 6A2 by a bonding material.

[0069] On the other hand, the first fixed-side terminal plate 5F1 is spaced apart from the fixed support portion 6FA11 of the first outer leaf spring 6A1 and does not contact the fixed support portion 6FA11. Similarly, the third fixed-side terminal plate 5F3 is spaced apart from the fixed support portion 6FA12 of the first outer leaf spring 6A1 and does not contact the fixed support portion 6FA12. The fifth fixed-side terminal plate 5F5 is spaced apart from the fixed support portion 6FA22 of the second outer leaf spring 6A2 and does not contact the fixed support portion 6FA22. The seventh fixed-side terminal plate 5F7 is spaced apart from the fixed support portion 6FA21 of the second outer leaf spring 6A2 and does not contact the fixed support portion 6FA21.

[0070] The first conductive member CM1 is joined in parallel to the fixed support portion 6FA11 of the first outer leaf spring 6A1 by welding such as laser welding at a rectangular through-hole formed in the fixed support portion 6FA11. That is, the first conductive member CM1 and the fixed support portion 6FA11 are joined with their surfaces substantially parallel to each other. Similarly, the sixth conductive member CM6 is joined in parallel to the fixed support portion 6FA22 of the second outer leaf spring 6A2 by welding such as laser welding at a rectangular through-hole formed in the fixed support portion 6FA22.

[0071] The second conductive member CM2 is joined in parallel to the fixed support portion 6FB1 of the first inner leaf spring 6B1 by laser welding or other welding at a rectangular through-hole formed in the fixed support portion 6FB1. The third conductive member CM3 is joined in parallel to the fixed support portion 6FB2 of the second inner leaf spring 6B2 by laser welding or other welding at a rectangular through-hole formed in the fixed support portion 6FB2. The seventh conductive member CM7 is joined in parallel to the fixed support portion 6FB3 of the third inner leaf spring 6B3 by laser welding or other welding at a rectangular through-hole formed in the fixed support portion 6FB3. The tenth conductive member CM10 is joined in parallel to the fixed support portion 6FB4 of the fourth inner leaf spring 6B4 by laser welding or other welding at a rectangular through-hole formed in the fixed support portion 6FB4.

[0072] Next, the path of the current flowing through the shape memory alloy wire SA will be described with reference to Fig. 8 to Fig. 11. Fig. 8 to Fig. 11 are perspective views of a part of the configuration shown in Fig. 7.

[0073] Specifically, the left diagram in Fig. 8 shows the path of current flowing through the first wire SA1 when the terminal of the first fixed-side terminal plate 5F1 is connected to a high potential and the terminal of the first conductive member CM1 is connected to a low potential. The right diagram in Fig. 8 shows the path of current flowing through the second wire SA2 when the terminal of the second fixed-side terminal plate 5F2 is connected to a high potential and the terminal of the first conductive member CM1 is connected to a low potential. The left diagram in Fig. 9 shows the path of current flowing through the third wire SA3 when the terminal of the fifth conductive member CM5 is connected to a high potential and the terminal of the first conductive member CM1 is connected to a low potential. The right diagram in Fig. 9 shows the path of current flowing through the fourth wire SA4 when the terminal of the fourth conductive member CM4 is connected to a high potential and the terminal of the first conductive member CM1 is connected to a low potential. The left diagram of FIG. 10 shows the path of current flowing through the fifth wire SA5 when the terminal of the fifth fixed side terminal plate 5F5 is connected to a high potential and the terminal of the sixth conductive member CM6 is connected to a low potential. The right diagram of FIG. 10 shows the path of current flowing through the sixth wire SA6 when the terminal of the sixth fixed side terminal plate 5F6 is connected to a high potential and the terminal of the sixth conductive member CM6 is connected to a low potential. The left diagram of FIG. 11 shows the path of current flowing through the seventh wire SA7 when the terminal of the eighth conductive member CM8 is connected to a high potential and the terminal of the sixth conductive member CM6 is connected to a low potential. The right diagram of FIG. 11 shows the path of current flowing through the eighth wire SA8 when the terminal of the ninth conductive member CM9 is connected to a high potential and the terminal of the sixth conductive member CM6 is connected to a low potential.

[0074] When the terminal portion of the first fixed side terminal plate 5F1 is connected to a high potential and the terminal portion of the first conductive member CM1 is connected to a low potential, a current flows through the first wire SA1 as shown by the arrow AR1 in the left diagram of Fig. 8. Specifically, the current flows through the first fixed side terminal plate 5F1, the first wire SA1, the first movable side terminal plate 5M1, and the first outer leaf spring 6A1 to the first conductive member CM1.

[0075] When the terminal portion of the second fixed side terminal plate 5F2 is connected to a high potential and the terminal portion of the first conductive member CM1 is connected to a low potential, a current flows through the second wire SA2 as shown by the arrow AR2 in the right diagram of Fig. 8. Specifically, the current flows through the second fixed side terminal plate 5F2, the second wire SA2, the first movable side terminal plate 5M1, and the first outer leaf spring 6A1 to the first conductive member CM1.

[0076] When the terminal of the fifth conductive member CM5 is connected to a high potential and the terminal of the first conductive member CM1 is connected to a low potential, a current flows through the third wire SA3 as shown by the arrow AR3 in the left diagram of Fig. 9. Specifically, the current flows through the fifth conductive member CM5, the third fixed-side terminal plate 5F3, the third wire SA3, the second movable-side terminal plate 5M2, and the first outer leaf spring 6A1 to the first conductive member CM1. The rear end of the fifth conductive member CM5 is joined to the lower end of the adjacent third fixed-side terminal plate 5F3 with a joining material.

[0077] When the terminal of the fourth conductive member CM4 is connected to a high potential and the terminal of the first conductive member CM1 is connected to a low potential, a current flows through the fourth wire SA4 as shown by the arrow AR4 in the right diagram of Fig. 9. Specifically, the current flows through the fourth conductive member CM4, the fourth fixed-side terminal plate 5F4, the fourth wire SA4, the second movable-side terminal plate 5M2, and the first outer leaf spring 6A1 to the first conductive member CM1. The rear end of the fourth conductive member CM4 is joined to the lower end of the adjacent fourth fixed-side terminal plate 5F4 with a joining material.

[0078] When the terminal portion of the fifth fixed side terminal plate 5F5 is connected to a high potential and the terminal portion of the sixth conductive member CM6 is connected to a low potential, a current flows through the fifth wire SA5 as shown by the arrow AR5 in the left diagram of Fig. 10. Specifically, the current flows through the fifth fixed side terminal plate 5F5, the fifth wire SA5, the third movable side terminal plate 5M3, and the second outer leaf spring 6A2 to the sixth conductive member CM6.

[0079] When the terminal portion of the sixth fixed side terminal plate 5F6 is connected to a high potential and the terminal portion of the sixth conductive member CM6 is connected to a low potential, a current flows through the sixth wire SA6 as shown by the arrow AR6 in the right diagram of Fig. 10. Specifically, the current flows through the sixth fixed side terminal plate 5F6, the sixth wire SA6, the third movable side terminal plate 5M3, and the second outer leaf spring 6A2 to the sixth conductive member CM6.

[0080] When the terminal of the eighth conductive member CM8 is connected to a high potential and the terminal of the sixth conductive member CM6 is connected to a low potential, a current flows through the seventh wire SA7 as shown by the arrow AR7 in the left diagram of Fig. 11. Specifically, the current flows through the eighth conductive member CM8, the seventh fixed terminal plate 5F7, the seventh wire SA7, the fourth movable terminal plate 5M4, and the second outer leaf spring 6A2 to the sixth conductive member CM6. The front end of the eighth conductive member CM8 is joined to the lower end of the adjacent seventh fixed terminal plate 5F7 with a joining material.

[0081] When the terminal of the ninth conductive member CM9 is connected to a high potential and the terminal of the sixth conductive member CM6 is connected to a low potential, a current flows through the eighth wire SA8 as shown by the arrow AR8 in the right diagram of Fig. 11. Specifically, the current flows through the ninth conductive member CM9, the eighth fixed-side terminal plate 5F8, the eighth wire SA8, the fourth movable-side terminal plate 5M4, and the second outer leaf spring 6A2 to the sixth conductive member CM6. The front end of the ninth conductive member CM9 is joined to the lower end of the adjacent eighth fixed-side terminal plate 5F8 with a joining material.

[0082] In the illustrated example, the paths of the currents flowing through the first wire SA1 to the fourth wire SA4 partially overlap. Specifically, the four current paths overlap where they pass through the first outer leaf spring 6A1 and the first conductive member CM1. Similarly, the paths of the currents flowing through the fifth wire SA5 to the eighth wire SA8 partially overlap. Specifically, the four current paths overlap where they pass through the second outer leaf spring 6A2 and the sixth conductive member CM6. This configuration has the effect of reducing the number of parts. Furthermore, the direction of the currents flowing through the first wire SA1 to the eighth wire SA8 may be opposite to the direction indicated by the arrows.

[0083] Next, with reference to Fig. 12, a description will be given of the path of current flowing through the inner leaf spring 6B when power is supplied to an electric device such as a variable diaphragm device attached to the lens holding member 2. Fig. 12 is a perspective view of a part of the configuration shown in Fig. 7.

[0084] When the terminal of the second conductive member CM2 is connected to a high potential and the terminal of the third conductive member CM3 is connected to a low potential, current flows from the second conductive member CM2 through the first inner leaf spring 6B1 to the electric device as shown by arrow AR11. Then, current from the electric device flows through the second inner leaf spring 6B2 to the third conductive member CM3 as shown by arrow AR12. Specifically, current flows through the second conductive member CM2, the fixed support member 6FB1, the movable support member 6MB1, the electric device, the movable support member 6MB2, and the fixed support member 6FB2 to the third conductive member CM3.

[0085] When the terminal of the seventh conductive member CM7 is connected to a high potential and the terminal of the tenth conductive member CM10 is connected to a low potential, current flows from the seventh conductive member CM7 through the third inner leaf spring 6B3 to the electric device as shown by arrow AR13. Then, current from the electric device flows through the fourth inner leaf spring 6B4 to the tenth conductive member CM10 as shown by arrow AR14. Specifically, current flows through the seventh conductive member CM7, the fixed support member 6FB3, the movable support member 6MB3, the electric device, the movable support member 6MB4, and the fixed support member 6FB4 to the tenth conductive member CM10.

[0086] The same is true when current flows from the second conductive member CM2 to the seventh conductive member CM7 or the tenth conductive member CM10, when current flows from the third conductive member CM3 to the second conductive member CM2, the seventh conductive member CM7, or the tenth conductive member CM10, when current flows from the seventh conductive member CM7 to the second conductive member CM2 or the third conductive member CM3, or when current flows from the tenth conductive member CM10 to the second conductive member CM2, the third conductive member CM3, or the seventh conductive member CM7.

[0087] Next, referring to FIG. 13 , the positional relationship between the case member 4, the metal member 5, and the base member 8 will be described. FIG. 13 is a top view of the case member 4, the metal member 5, and the base member 8. Specifically, the upper view of FIG. 13 is a top view of the case member 4 and the metal member 5, and the lower view of FIG. 13 is a top view of the base member 8. Note that, for clarity, FIG. 13 omits illustration of members other than the case member 4, the metal member 5, and the base member 8. Also, for clarity, the lower view of FIG. 13 indicates the inner surface IF of the lower outer peripheral wall portion 4A of the case member 4 with a dashed line. Note that the upper view of FIG. 13 is a top view showing the position of the movable-side metal member 5M when the lens holding member 2 is in the neutral state or the initial state. In this way, the lens driving device 100 is configured so that the neutral position and the initial position of the lens holding member 2 are the same in the X-axis and Y-axis directions.

[0088] As shown in the upper diagram of Figure 13, the first fixed side terminal plate 5F1 to the eighth fixed side terminal plate 5F8 and the first movable side terminal plate 5M1 to the fourth movable side terminal plate 5M4 are configured to be positioned at a predetermined distance from the inner surface IF of the lower outer peripheral wall portion 4A of the case member 4.

[0089] Specifically, the outer surface EF1 of the plate-shaped portion PM of each of the third fixed-side terminal plate 5F3 and the fourth fixed-side terminal plate 5F4 is disposed at a distance GP1 from the inner surface IF of the lower outer peripheral wall portion 4A (second lower side plate portion 4A2). The same applies to the plate-shaped portions PM of the first fixed-side terminal plate 5F1, the second fixed-side terminal plate 5F2, and the fifth fixed-side terminal plate 5F5 to the eighth fixed-side terminal plate 5F8. The outer surface EF2 of the plate-shaped portion PM of the second movable-side terminal plate 5M2 is disposed at a distance GP2 from the inner surface IF of the lower outer peripheral wall portion 4A (second lower side plate portion 4A2). The distance GP2 is larger than the distance GP1. The same applies to the plate-shaped portions PM of the first movable-side terminal plate 5M1, the third movable-side terminal plate 5M3, and the fourth movable-side terminal plate 5M4.

[0090] That is, the plate-shaped portions PM of each of the eight fixed side metal members 5F (first fixed side terminal plate 5F1 to eighth fixed side terminal plate 5F8) are positioned closer to the inner surface IF of the lower outer peripheral wall portion 4A of the case member 4 than the plate-shaped portions PM of each of the four movable side metal members 5M (first movable side terminal plate 5M1 to fourth movable side terminal plate 5M4).

[0091] As shown in the lower diagram of Figure 13, each of the four side portions 8E (first side portion 8E1 to fourth side portion 8E4) of the base member 8 is arranged so as to be adhesively fixed to the inner surface IF of the lower outer wall portion 4A of the case member 4 at the fixing portions 8P (first fixing portion 8P1 to fourth fixing portion 8P4) via adhesive AD4 (see Figures 14 to 17).

[0092] Specifically, the fixing portion 8P is a portion formed to protrude outward from the outer circumferential surface of the side portion 8E. In the illustrated example, the fixing portion 8P includes a first fixing portion 8P1 protruding from the outer circumferential surface of the first side portion 8E1 toward the X1 side, a second fixing portion 8P2 protruding from the outer circumferential surface of the second side portion 8E2 toward the Y1 side, a third fixing portion 8P3 protruding from the outer circumferential surface of the third side portion 8E3 toward the X2 side, and a fourth fixing portion 8P4 protruding from the outer circumferential surface of the fourth side portion 8E4 toward the Y2 side.

[0093] Next, with reference to FIGS. 13 to 15, the adhesive reservoir AC formed on the outer surface of the fixing portion 8P will be described. FIG. 14 is a front view of the lens driving device 100. Specifically, the upper view of FIG. 14 is a front view of the lens driving device 100 with a housing HS composed of a cover member 3 and a case member 4 attached. The center view of FIG. 14 is a front view of the lens driving device 100 with the housing HS removed. The lower view of FIG. 14 is an enlarged view of an area R1 surrounded by a dashed line in the center view of FIG. 14. FIG. 15 is a left side view of the lens driving device 100. Specifically, the upper view of FIG. 15 is a left side view of the lens driving device 100 with the housing HS attached. The center view of FIG. 15 is a left side view of the lens driving device 100 with the housing HS removed. The lower view of FIG. 15 is an enlarged view of an area R2 surrounded by a dashed line in the center view of FIG. 15.

[0094] The adhesive reservoir AC is a space where the adhesive AD4 for bonding the case member 4 and the base member 8 accumulates. Specifically, as shown in Fig. 13, the adhesive reservoir AC includes a front adhesive reservoir AC1, a left adhesive reservoir AC2, a rear adhesive reservoir AC3, and a right adhesive reservoir AC4. More specifically, the front adhesive reservoir AC1 includes a first front adhesive reservoir AC11 and a second front adhesive reservoir AC12, the left adhesive reservoir AC2 includes a first left adhesive reservoir AC21 and a second left adhesive reservoir AC22, the rear adhesive reservoir AC3 includes a first rear adhesive reservoir AC31 and a second rear adhesive reservoir AC32, and the right adhesive reservoir AC4 includes a first right adhesive reservoir AC41 and a second right adhesive reservoir AC42.

[0095] The front adhesive reservoir AC1 is formed on an outer surface 8P1E of the first fixing portion 8P1 of the base member 8. Specifically, as shown in Fig. 14, a groove 8G (front groove 8G1) that functions as the front adhesive reservoir AC1 is formed on the outer surface 8P1E. The front groove 8G1 includes a first front groove 8G11 and a second front groove 8G12.

[0096] An outer surface 8P1E of the first fixing portion 8P1 is a flat surface that is adhered and fixed to the inner surface IF of the lower outer peripheral wall portion 4A (first lower side plate portion 4A1) via an adhesive AD4, and is configured to extend parallel to the inner surface IF.

[0097] In the illustrated example, the front groove 8G1 is a space with a substantially semicircular cross section that is formed to extend along the Z-axis direction. The adhesive AD4 applied to the lower end of the outer surface 8P1E through the first through-hole 4H1 moves upward by capillary action within the front groove 8G1, which is covered by the lower outer peripheral wall 4A (first lower side plate 4A1), and reaches the upper end of the first fixing portion 8P1, as shown in the lower diagram of FIG. 14. Note that in the lower diagram of FIG. 14, a cross pattern is applied to the adhesive AD4 for clarity.

[0098] The left adhesive reservoir AC2 (see the lower diagram in FIG. 13) is formed on the outer surface 8P2E of the second fixing portion 8P2 of the base member 8. Specifically, as shown in FIG. 15, an inclined portion 8C (left inclined portion 8C2) that functions as the left adhesive reservoir AC2 is formed on the outer surface 8P2E. The left inclined portion 8C2 includes a first left inclined portion 8C21 and a second left inclined portion 8C22.

[0099] The outer surface 8P2E of the second fixing portion 8P2 is a flat surface that is adhered and fixed to the inner surface IF of the lower outer peripheral wall portion 4A (second lower side plate portion 4A2) via an adhesive AD4, and is configured to extend parallel to the inner surface IF.

[0100] In the illustrated example, the left inclined portion 8C2 is a space with a substantially triangular cross section formed to extend along the Z-axis direction. When the base member 8 is placed inside the case member 4, the adhesive AD4 applied to the inner bottom surface or inner surface IF of the case member 4 moves upward by capillary action within the left inclined portion 8C2 covered by the lower outer peripheral wall portion 4A (second lower side plate portion 4A2), and reaches the upper end of the second fixing portion 8P2, as shown in the lower diagram of FIG. 15. Note that in the lower diagram of FIG. 15, a cross pattern is applied to the adhesive AD4 for clarity.

[0101] The rear adhesive reservoir AC3 (see the lower diagram in FIG. 13) is formed on an outer surface 8P3E of the third fixing portion 8P3 of the base member 8. Specifically, a groove 8G (rear groove 8G3) that functions as the rear adhesive reservoir AC3 is formed on the outer surface 8P3E. The rear groove 8G3 includes a first rear groove 8G31 and a second rear groove 8G32.

[0102] An outer surface 8P3E of the third fixing portion 8P3 is a flat surface that is adhered and fixed to the inner surface IF of the lower outer peripheral wall portion 4A (third lower side plate portion 4A3) via an adhesive AD4, and is configured to extend parallel to the inner surface IF.

[0103] In the illustrated example, the rear groove 8G3 is a space with a substantially semicircular cross section that is formed to extend along the Z-axis direction. The adhesive AD4 applied to the lower end of the outer surface 8P3E through the second through-hole 4H2 moves upward by capillary action within the rear groove 8G3 covered by the lower outer peripheral wall 4A (third lower side plate 4A3) and reaches the upper end of the third fixing portion 8P3.

[0104] The right adhesive reservoir AC4 (see the lower diagram in FIG. 13) is formed on an outer surface 8P4E of the fourth fixing portion 8P4 of the base member 8. Specifically, an inclined portion 8C (right inclined portion 8C4) that functions as the right adhesive reservoir AC4 is formed on the outer surface 8P4E. The right inclined portion 8C4 includes a first right inclined portion 8C41 and a second right inclined portion 8C42.

[0105] An outer surface 8P4E of the fourth fixing portion 8P4 is a flat surface that is adhesively fixed to the inner surface IF of the lower outer peripheral wall portion 4A (fourth lower side plate portion 4A4) via an adhesive AD4, and is configured to extend parallel to the inner surface IF.

[0106] In the illustrated example, the right inclined portion 8C4 is a space with a substantially triangular cross section that is formed to extend along the Z-axis direction. When the base member 8 is placed inside the case member 4, the adhesive AD4 applied to the inner bottom surface or inner surface IF of the case member 4 moves upward by capillary action inside the right inclined portion 8C4 that is covered by the lower outer peripheral wall portion 4A (fourth lower side plate portion 4A4) and reaches the upper end of the fourth fixed portion 8P4.

[0107] As described above, the adhesive AD4 spread between the lower outer peripheral wall portion 4A of the case member 4 and the fixing portion 8P of the base member 8 can firmly bond and fix the case member 4 and the base member 8 together.

[0108] Next, the effects of the adhesive reservoir AC will be described with reference to FIGS. 16 and 17. FIG. 16 is an enlarged view of the area R3 surrounded by the dashed line in the lower view of FIG. 13. Specifically, the upper view of FIG. 16 shows the state before the inner surface IF of the case member 4 and the first fixing portion 8P1 are separated due to an impact or the like, and the lower view of FIG. 16 shows the state after the inner surface IF of the case member 4 and the first fixing portion 8P1 are separated due to an impact or the like. FIG. 17 is an enlarged view of the area R4 surrounded by the dashed line in the lower view of FIG. 13. Specifically, the left view of FIG. 17 shows the state before the inner surface IF of the case member 4 and the second fixing portion 8P2 are separated due to an impact or the like, and the right view of FIG. 17 shows the state after the inner surface IF of the case member 4 and the second fixing portion 8P2 are separated due to an impact or the like. Note that in FIGS. 16 and 17, a cross pattern is applied to the adhesive AD4 for clarity.

[0109] 16, the first front adhesive reservoir AC11 is configured so that its depth DH11 in the direction perpendicular to the inner surface IF (X-axis direction) is greater than the diameter DA2 of the second wire SA2. The second front adhesive reservoir AC12 is configured so that its depth DH12 in the direction perpendicular to the inner surface IF (X-axis direction) is greater than the diameter DA2 of the second wire SA2. In the illustrated example, the depths DH11 and DH12 are the same. For convenience, the depths DH (depths DH11 and DH12) are expressed as the distance from the inner surface IF when the inner surface IF and the first fixing portion 8P1 are not separated.

[0110] This configuration has the effect of preventing the second wire SA2 in a loose state from entering the gap DB1 formed between the inner surface IF of the case member 4 and the first fixing portion 8P1 when the two are separated due to an impact or the like.

[0111] As shown in the lower diagram of FIG. 16 , even when the inner surface IF of the case member 4 and the first fixing portion 8P1 are separated due to an impact or the like, the adhesive AD4 hardened in the front adhesive reservoir AC1 (the space formed by the front groove 8G1) typically remains attached to the inner surface IF of the case member 4. In this case, even when the gap DB1 between the inner surface IF and the first fixing portion 8P1 is larger than the diameter DA2 of the second wire SA2, larger than the depth DH11 of the first front adhesive reservoir AC11, and larger than the depth DH12 of the second front adhesive reservoir AC12, the gap CL1 between the adhesive AD4 adhering to the inner surface IF and the outer surface 8P1E of the first fixing portion 8P1 is smaller than the diameter DA2 of the second wire SA2. Therefore, the adhesive AD4 adhering to the inner surface IF can prevent the second wire SA2 in a slack state from entering the gap DB1. The same applies to the adhesive AD4 hardened in the rear adhesive reservoir AC3.

[0112] 17, the first left-side adhesive reservoir AC21 is configured so that its depth DH21 in the direction perpendicular to the inner surface IF (the Y-axis direction) is greater than the diameter DA4 of the fourth wire SA4. The second left-side adhesive reservoir AC22 is configured so that its depth DH22 in the direction perpendicular to the inner surface IF (the Y-axis direction) is greater than the diameter DA4 of the fourth wire SA4. In the illustrated example, the depth DH21 is greater than the depth DH22. For convenience, the illustrated example represents the depth DH (depth DH21 and depth DH22) as the distance from the inner surface IF when the inner surface IF and the second fixing portion 8P2 are not separated.

[0113] This configuration has the effect of preventing the loose fourth wire SA4 from entering the gap DB2 formed between the inner surface IF of the case member 4 and the second fixing portion 8P2 when the inner surface IF and the second fixing portion 8P2 are separated due to an impact or the like.

[0114] As shown in the right diagram of FIG. 17 , even when the inner surface IF of the case member 4 and the second fixing portion 8P2 are separated due to an impact or the like, the adhesive AD4 hardened in the left adhesive reservoir AC2 (the space formed by the left inclined portion 8C2) typically remains attached to the inner surface IF of the case member 4. In this case, even when the gap DB2 between the inner surface IF and the second fixing portion 8P2 is larger than the diameter DA4 of the fourth wire SA4, the gap DB2 is smaller than the depth DH21 of the first left adhesive reservoir AC21 and smaller than the depth DH22 of the second left adhesive reservoir AC22. Therefore, the adhesive AD4 adhering to the inner surface IF can prevent the loosened fourth wire SA4 from entering the gap DB2. The same applies to the adhesive AD4 hardened in the right adhesive reservoir AC4.

[0115] In this way, the adhesive AD4 hardened in the adhesive reservoir AC can prevent the shape memory alloy wire SA from entering the gap DB between the inner surface IF of the case member 4 and the fixed portion 8P, even if the inner surface IF of the case member 4 and the fixed portion 8P are separated due to an impact or the like.

[0116] Next, the positional relationship between the case member 4, the metal member 5, and the shape memory alloy wire SA will be described with reference to Figure 18. Figure 18 is a front view of the case member 4, the metal member 5, and the shape memory alloy wire SA. In Figure 18, only the outline of the case member 4 is shown by dashed lines so that the positional relationship between the metal member 5 (first movable side terminal plate 5M1, first fixed side terminal plate 5F1, and second fixed side terminal plate 5F2) and the shape memory alloy wire SA (first wire SA1 and second wire SA2) arranged inside the case member 4 can be seen. Also, in Figure 18, for clarity, members other than the first movable side terminal plate 5M1, first fixed side terminal plate 5F1, second fixed side terminal plate 5F2, first wire SA1, and second wire SA2 are not shown. Note that Figure 18 shows the position of the movable side metal member 5M (first movable side terminal plate 5M1) when the lens holding member 2 is in its initial state, and for convenience, the first wire SA1 and the second wire SA2 are shown in an unslackened state.

[0117] 18, a first point P1 at one end (an end on the fixed side) of the second wire SA2, which is positioned outside the first wire SA1, and a second point P2 at the other end (an end on the movable side) of the second wire SA2 are at different heights in the vertical direction (Z-axis direction). The lower outer peripheral wall 4A of the case member 4 extends to a position higher than a midpoint P3 between the first point P1 and the second point P2.

[0118] Specifically, the first point P1 is a point at a height H1 where one end (the fixed end) of the second wire SA2 is fixed to the second fixed-side terminal plate 5F2. The height H1 is the height in the vertical direction (Z-axis direction) based on the bottom surface of the bottom plate portion 4B of the case member 4. The same applies to heights H2 to H6 described below.

[0119] The second point P2 is a point at a height H4 where the other end (the end on the movable side) of the second wire SA2 is fixed to the first movable side terminal plate 5M1.

[0120] The midpoint P3 between the first point P1 and the second point P2 is a point at a height H2. In the illustrated example, the midpoint P3 is located at a position where the first wire SA1 and the second wire SA2 intersect when not slackened as viewed from the X1 side. However, the midpoint P3 between the first point P1 and the second point P2 in the vertical direction (Z-axis direction) does not have to be at the same height as the position where the first wire SA1 and the second wire SA2 intersect when not slackened.

[0121] Each of the four lower side plate portions (first lower side plate portion 4A1 to fourth lower side plate portion 4A4) constituting the lower outer peripheral wall portion 4A of the case member 4 is configured to have a height H3 that is higher than the height H2 of the midpoint P3.

[0122] 18 shows that the first lower side plate portion 4A1 has a height H3 that is higher than the height H2 of the midpoint P3. This configuration prevents the portion of the second wire SA2 that is lower than the midpoint P3 from being pinched between the upper outer peripheral wall portion 3A of the cover member 3 and the base member 8 when the cover member 3 is attached to the case member 4. This is because the lower outer peripheral wall portion 4A of the case member 4 is disposed between the upper outer peripheral wall portion 3A and the base member 8.

[0123] 18, each of the four lower corner plate portions 4C (first lower corner plate portion 4C1 to fourth lower corner plate portion 4C4) constituting the lower outer peripheral wall portion 4A of the case member 4 is configured to have a height H5 that is higher than the height H4 of the second point P2. Furthermore, each of the four lower corner plate portions 4C (first lower corner plate portion 4C1 to fourth lower corner plate portion 4C4) has a positioning protrusion TP that is used to position the cover member 3 relative to the case member 4 in the up-down direction (Z-axis direction). The positioning protrusion TP is formed to have a height H6 that is higher than the height H5 of the lower corner plate portions 4C.

[0124] Figure 18 shows that the second lower corner plate portion 4C2 has a height H5 that is higher than the height H4 of the second point P2, and that the positioning protrusion TP of the second lower corner plate portion 4C2 has a height H6 that is higher than the height H5.

[0125] Next, the insulating member IM provided in the leaf spring 6 will be described with reference to Fig. 19. Fig. 19 is a bottom view of the leaf spring 6. Specifically, the upper left view of Fig. 19 is a bottom view of the leaf spring 6 arranged together with the plate-shaped member 1 inside the cover member 3, the center left view of Fig. 19 is a bottom view of the leaf spring 6 arranged inside the plate-shaped member 1, and the lower left view of Fig. 19 is a bottom view of the leaf spring 6 arranged alone. In addition, the right view of Fig. 19 is an enlarged view of the area R5 surrounded by the dashed line in the lower left view of Fig. 19.

[0126] As shown in FIG. 19 , the elastic arm portion 6EA21 of the second outer leaf spring 6A2 and the elastic arm portion 6EB4 of the fourth inner leaf spring 6B4 have adjacent portions along the fourth upper side plate portion 3A4 of the cover member 3. In these adjacent portions, adhesive AD3 serving as an insulating member IM is provided at four locations on the elastic arm portion 6EA21. The four adhesives AD3 are provided at intervals of a predetermined distance IT or more. In the illustrated example, the four adhesives AD3 maintain a stretchable state to the extent that they do not interfere with the elasticity of the leaf spring 6. The adhesive AD3 constituting the insulating member IM may be formed of a material other than adhesive, such as a synthetic resin. Furthermore, the adhesive AD3 may be provided on the elastic arm portion 6EB4 instead of the elastic arm portion 6EA21, or may be provided on both the elastic arm portion 6EA21 and the elastic arm portion 6EB4.

[0127] This configuration can prevent the elastic arm portion 6EA21 (second outer leaf spring 6A2) and the elastic arm portion 6EB4 (fourth inner leaf spring 6B4) from coming into contact with each other and becoming electrically connected (short-circuited).

[0128] In the illustrated example, four adhesives AD3 as insulating members IM are applied to each of the elastic arm portions 6EA11, 6EA12, 6EA21, and 6EA22. In this case, the plate-shaped member 1 functioning as the insulating member IM may be omitted. This is because, even when the elastic arm portion 6EB4 comes into contact with the cover member 3, which is a conductive member, in the absence of the plate-shaped member 1, the adhesive AD3 can prevent the elastic arm portion 6EA21 from coming into contact with the cover member 3 and becoming electrically conductive to the elastic arm portion 6EB4 via the cover member 3. In this case, the adhesive AD3 may be applied to each of the elastic arm portions 6EB1 to 6EB4. This is to more reliably prevent electrical conduction between the two elastic arms.

[0129] As shown in Fig. 19, the elastic arm 6E is formed to have a bent portion BP and an extending portion EP extending from the bent portion BP. In the example shown in Fig. 19, the bent portion BP is a portion that bends so as to reverse the extending direction of the elastic arm 6E, and the extending portion EP is a portion other than the bent portion BP. In the example shown in Fig. 19, the elastic arm 6EB4 has five bent portions BP, and the elastic arm 6EA21 has two bent portions BP. In the example shown in Fig. 19, the adhesive AD3 is provided on the extending portion EP.

[0130] This configuration has the advantage that the influence on the spring constant of the leaf spring 6 is smaller than when an insulating member IM is provided at the bent portion BP, that is, when an adhesive AD3 is applied to the bent portion BP.

[0131] Next, a workpiece WK including a leaf spring 6 will be described with reference to FIGS. 20 and 21. FIG. 20 is a perspective view of the workpiece WK. Specifically, the upper view of FIG. 20 is a perspective view of the entire workpiece WK. The center view of FIG. 20 is an enlarged view of an area R6 surrounded by a dashed line in the upper view of FIG. 20. The lower view of FIG. 20 is an enlarged view of an area R7 surrounded by a dashed line in the center view of FIG. 20. FIG. 21 is a perspective view of a leaf spring 6 made from the workpiece WK. Specifically, the upper view of FIG. 21 is an enlarged view of an area R8 surrounded by a dashed line in the upper view of FIG. 21. The lower view of FIG. 21 is an enlarged view of an area R9 surrounded by a dashed line in the center view of FIG. 21.

[0132] The workpiece WK is a component used to produce the leaf spring 6 and is also referred to as the "workpiece," and includes a removed portion RM, a non-removed portion AM (leaf spring 6), and a connecting portion CN. The removed portion RM is the portion that is removed from the workpiece WK to produce the leaf spring 6 from the workpiece WK, and includes a main body portion MP, an elastically deforming portion ET, a front removed portion FP, and a rear removed portion RP. The non-removed portion AM is the portion that remains after the removed portion RM is removed from the workpiece WK, and corresponds to the leaf spring 6 in the illustrated example.

[0133] The front removal portion FP and the rear removal portion RP are cut from the non-removal portion AM by a cutting device (not shown). In the illustrated example, after the workpiece WK is attached to the lens holding member 2 and the base member 8, the front removal portion FP and the rear removal portion RP are cut from the non-removal portion AM by irradiating the workpiece WK with laser light emitted by a laser cutting device (not shown) along a cutting line LC.

[0134] The main body portion MP and the elastic deformation portion ET are configured to collectively hold the respective movable support portions 6M of the four inner leaf springs 6B before the removal portion RM is removed from the workpiece WK.

[0135] In the illustrated example, the main body portion MP and the elastic deformation portion ET are configured to be disposed inside the four inner leaf springs 6B, i.e., to be disposed inside the opening 2K of the lens holding member 2 when the workpiece WK is attached to the lens holding member 2. The main body portion MP is disposed inside the four elastic deformation portions ET. In other words, the main body portion MP is connected to the four elastic deformation portions ET at its outer periphery.

[0136] Specifically, the main body portion MP is an annular portion having a circular hole MH in its center. The elastic deformation portion ET is a portion that elastically deforms when the main body portion MP is moved in the optical axis direction. The elastic deformation portion ET includes a first elastic deformation portion ET1 corresponding to the movable support portion 6MB1 of the first inner leaf spring 6B1, a second elastic deformation portion ET2 corresponding to the movable support portion 6MB2 of the second inner leaf spring 6B2, a third elastic deformation portion ET3 corresponding to the movable support portion 6MB3 of the third inner leaf spring 6B3, and a fourth elastic deformation portion ET4 corresponding to the movable support portion 6MB4 of the fourth inner leaf spring 6B4.

[0137] The connecting portion CN is a portion that connects the removed portion RM and the non-removed portion AM. In the illustrated example, the connecting portion CN is configured to connect the elastic deformation portion ET, which is a part of the removed portion RM, to the movable support portion 6M of the inner leaf spring 6B, which is a part of the non-removed portion AM. The connecting portion CN is configured so that a part of it can be removed together with the removed portion RM.

[0138] In the illustrated example, the connecting portion CN includes a first connecting portion CN1 connecting the movable support portion 6MB1 of the first inner leaf spring 6B1 to the first elastic deformation portion ET1, a second connecting portion CN2 connecting the movable support portion 6MB2 of the second inner leaf spring 6B2 to the second elastic deformation portion ET2, a third connecting portion CN3 connecting the movable support portion 6MB3 of the third inner leaf spring 6B3 to the third elastic deformation portion ET3, and a fourth connecting portion CN4 connecting the movable support portion 6MB4 of the fourth inner leaf spring 6B4 to the fourth elastic deformation portion ET4.

[0139] The movable support portion 6M (movable support portions 6MB1 to 6MB4) of the inner leaf spring 6B has an inner fixed portion FI and an outer fixed portion FE, which are portions fixed to the lens holding member 2. In the illustrated example, when a protrusion 2T formed on the upper surface of the lens holding member 2 is heat-stakingly performed, the inner fixed portion FI and the outer fixed portion FE are portions that are covered by the tip of the protrusion 2T that is crushed by the heat-staking. In Figures 20 and 21, for clarity, dot patterns are applied to the inner fixed portion FI and the outer fixed portion FE.

[0140] In the illustrated example, the inner fixed portion FI is disposed adjacent to the connecting portion CN, and the outer fixed portion FE is disposed outward (farther from the optical axis OA) than the inner fixed portion FI. The elastic arm portion 6E of the inner leaf spring 6B is configured to extend from between the inner fixed portion FI and the outer fixed portion FE. The width of the connecting portion CN along a width direction perpendicular to the direction in which the connecting portion CN extends (extension direction) is smaller than the width of the inner fixed portion FI along the same width direction.

[0141] 20, the elastic deformation portion ET has an extension portion EL that extends in a direction intersecting the extension direction of the connection portion CN. In this case, a part of the extension portion EL is located on an extension line on the inside of the connection portion CN.

[0142] The elastic deformation part ET is formed in a substantially U-shape, with one end connected to the connecting part CN and the other end connected to the main part MP. In this case, the width of the part connected to the main part MP is larger than the width of the part connected to the connecting part CN.

[0143] In the example shown in the center diagram of Figure 20, the movable support portion 6MB3 of the third inner leaf spring 6B3 has a third inner fixed portion FI3 and a third outer fixed portion FE3, and the movable support portion 6MB4 of the fourth inner leaf spring 6B4 has a fourth inner fixed portion FI4 and a fourth outer fixed portion FE4. The third inner fixed portion FI3 is disposed adjacent to the third connecting portion CN3, and the fourth inner fixed portion FI4 is disposed adjacent to the fourth connecting portion CN4. The elastic arm portion 6EB3 of the third inner leaf spring 6B3 is configured to extend from between the third inner fixed portion FI3 and the third outer fixed portion FE3, and the elastic arm portion 6EB4 of the fourth inner leaf spring 6B4 is configured to extend from between the fourth inner fixed portion FI4 and the fourth outer fixed portion FE4.

[0144] 20, the width WD1 of the third connecting portion CN3 along the width direction perpendicular to the direction in which the third connecting portion CN3 extends (the axial direction of the central axis AX3) is smaller than the width WD2 of the third inner fixed portion FI3 along the same width direction. The same is true for the widths of the first connecting portion CN1, the second connecting portion CN2, and the fourth connecting portion CN4.

[0145] 20, the third elastic deformation portion ET3 has a third extending portion EL3 extending in a direction intersecting the extension direction of the third connecting portion CN3 (the axial direction of the central axis AX3), and the fourth elastic deformation portion ET4 has a fourth extending portion EL4 extending in a direction intersecting the extension direction of the fourth connecting portion CN4 (the axial direction of the central axis AX4). The same is true for the first elastic deformation portion ET1 and the second elastic deformation portion ET2.

[0146] 20, the third elastic deformation member ET3 is formed in a substantially U-shape, with one end (outer end) connected to the third connecting member CN3 and the other end (inner end) connected to the main body member MP. In this case, the width WD3 of the portion connected to the main body member MP is greater than the width WD4 of the portion connected to the third connecting member CN3 (see the lower diagram in FIG. 20). The same is true for each of the first elastic deformation member ET1, the second elastic deformation member ET2, and the fourth elastic deformation member ET4.

[0147] A manufacturing method for a lens driving device 100, which is an example of an optical component driving device, includes the steps of fixing the movable support portion 6M (movable support portions 6MB1 to 6MB4) of the inner leaf spring 6B to the lens holding member 2 so that the removal portion RM (main body portion MP and elastic deformation portion ET), which is part of the workpiece WK, is positioned in the opening 2K of the optical component holding member (lens holding member 2), and moving the main body portion MP in a direction intersecting the plate surface of the main body portion MP to twist the connecting portion CN provided inside the movable support portion 6M, thereby cutting the connecting portion CN.

[0148] Specifically, the main body portion MP has a hole MH for engaging a jig (not shown). The step of cutting the connecting portion CN may include a step of hooking a jig into the hole MH and pulling the main body portion MP upward, a step of hooking a jig into the hole MH and pushing the main body portion MP downward, a step of inserting a jig into the hole MH from below the main body portion MP and pushing the main body portion MP upward, or a step of inserting a jig into the hole MH from above the main body portion MP and pushing the main body portion MP downward.

[0149] The detachment portion TF, which is a part of the severed connecting portion CN, is left inside the movable support portion 6M of the inner leaf spring 6B, as shown in Fig. 21. Specifically, as shown in the upper diagram of Fig. 21, the detachment portion TF includes a first detachment portion TF1 which is a part of the first connecting portion CN1 corresponding to the first inner fixed portion FI1, a second detachment portion TF2 which is a part of the second connecting portion CN2 corresponding to the second inner fixed portion FI2, a third detachment portion TF3 which is a part of the third connecting portion CN3 corresponding to the third inner fixed portion FI3, and a fourth detachment portion TF4 which is a part of the fourth connecting portion CN4 corresponding to the fourth inner fixed portion FI4.

[0150] In the illustrated example, the leaf spring 6 has a combination of two adjacent inner fixed portions FI (a combination of a first inner fixed portion FI1 and a second inner fixed portion FI2, or a combination of a third inner fixed portion FI3 and a fourth inner fixed portion FI4). As shown in the center diagram of Figure 21, the third detachment portion TF3 and the fourth detachment portion TF4 are formed so that their respective tips are inclined in opposite directions relative to the plate surface PF of the movable support portion 6M of the inner leaf spring 6B.

[0151] Specifically, when the main body MP is moved upward with the workpiece WK (leaf spring 6) fixed to the lens holding member 2 and the base member 8, the third connecting portion CN3 is twisted and cut in the direction indicated by the arrow AR3 in Fig. 21, and a part of it, the third detachment portion TF3, remains inside the movable support member 6MB3. Similarly, the fourth connecting portion CN4 is twisted and cut in the direction indicated by the arrow AR4 in Fig. 21, and a part of it, the fourth detachment portion TF4, remains inside the movable support member 6MB4.

[0152] That is, as shown in FIG. 21, the tip of the third cut-off portion TF3 is formed so as to be inclined in the direction indicated by arrow AR3 relative to the plate surface PF of the movable support portion 6MB3. Similarly, the tip of the fourth cut-off portion TF4 is formed so as to be inclined in the direction indicated by arrow AR4 relative to the plate surface PF of the movable support portion 6MB4. Note that for clarity, in FIG. 21, the inclination of the tip of the third cut-off portion TF3 is represented by dashed line L3, and the inclination of the tip of the fourth cut-off portion TF4 is represented by dashed line L4. The dashed line L3 is a line parallel to the upper edge of the tip of the third cut-off portion TF3, and the dashed line L4 is a line parallel to the upper edge of the tip of the fourth cut-off portion TF4. However, the upper edge of the tip of the third cut-off portion TF3 does not have to be a completely straight line. The same applies to the upper edge of the tip of the fourth cut-off portion TF4.

[0153] The direction indicated by the arrow AR3 and the direction indicated by the arrow AR4 are opposite to each other. Specifically, the direction indicated by the arrow AR3 is the clockwise direction with respect to the central axis AX3 of the third connection portion CN3 (third cut-off portion TF3) when viewed from the center (optical axis OA) of the opening 2K. And the direction indicated by the arrow AR4 is the counterclockwise direction with respect to the central axis AX4 of the fourth connection portion CN4 (fourth cut-off portion TF4) when viewed from the center (optical axis OA) of the opening 2K.

[0154] Next, the removed portion RM on the inside of the inner leaf spring 6B will be described with reference to Figure 22. Figure 22 is a perspective view of a portion of the removed portion RM that constitutes the workpiece WK. Specifically, the upper view of Figure 22 is a perspective view of the removed portion RM on the inside of the inner leaf spring 6B. The lower view of Figure 22 is an enlarged view of the area R10 surrounded by a dashed line in the upper view of Figure 22.

[0155] The removal portion RM on the inner side of the inner leaf spring 6B includes a main body portion MP and four elastic deformation portions ET (first elastic deformation portion ET1 to fourth elastic deformation portion ET4). Each of the four elastic deformation portions ET (first elastic deformation portion ET1 to fourth elastic deformation portion ET4) includes an extending portion EL, an inner connection portion QA, and an outer connection portion QC. Specifically, the first elastic deformation portion ET1 includes a first extending portion EL1, the second elastic deformation portion ET2 includes a second extending portion EL2, the third elastic deformation portion ET3 includes a third extending portion EL3, and the fourth elastic deformation portion ET4 includes a fourth extending portion EL4. Each of the four extending portions EL (first extending portion EL1 to fourth extending portion EL4) includes an inner extending portion UI, an outer extending portion UE, and a bending portion BD. In FIG. 22, for clarity, the inner connection portion QA, the outer connection portion QC, and the bending portion BD are indicated by dot patterns.

[0156] The inner connection portion QA is a portion that connects the extension portion EL and the main body portion MP, and the outer connection portion QC is a portion that connects the extension portion EL and the coupling portion CN.

[0157] The inner extension portion UI is located more inward than the outer extension portion UE and is formed to extend along the circumference of a circle centered on the optical axis OA. The outer extension portion UE is located more outward than the inner extension portion UI and is formed to extend along the circumference of a circle centered on the optical axis OA. The bend portion BD is formed to connect the inner extension portion UI and the outer extension portion UE so that the inner extension portion UI extends along the outer extension portion UE.

[0158] 22, the inner extending portion UI of the first elastic deformation portion ET1 (first extending portion EL1) extends counterclockwise from the inner connecting portion QA along a circle centered on the optical axis OA, and the outer extending portion UE of the first elastic deformation portion ET1 (first extending portion EL1) extends clockwise from the bending portion BD along a circle centered on the optical axis OA. On the other hand, the inner extending portion UI of the second elastic deformation portion ET2 (second extending portion EL2) extends clockwise from the inner connecting portion QA along a circle centered on the optical axis OA, and the outer extending portion UE of the second elastic deformation portion ET2 (second extending portion EL2) extends counterclockwise from the bending portion BD along a circle centered on the optical axis OA. Similarly, the inner extending portion UI of the third elastic deformation portion ET3 (third extending portion EL3) extends counterclockwise from the inner connecting portion QA along a circle centered on the optical axis OA, and the outer extending portion UE of the third elastic deformation portion ET3 (third extending portion EL3) extends clockwise from the bending portion BD along a circle centered on the optical axis OA. On the other hand, the inner extending portion UI of the fourth elastic deformation portion ET4 (fourth extending portion EL4) extends clockwise from the inner connecting portion QA along a circle centered on the optical axis OA, and the outer extending portion UE of the fourth elastic deformation portion ET4 (fourth extending portion EL4) extends counterclockwise from the bending portion BD along a circle centered on the optical axis OA.

[0159] As shown in the lower diagram of Figure 22, the outer connection portion QC is formed so as to extend on both sides of the coupling portion CN in a width direction, which is a direction perpendicular to the extension direction of the coupling portion CN (the radial direction of a circle centered on the optical axis OA). Specifically, the width of the outer connection portion QC along the width direction is greater than the width of the coupling portion CN along the same width direction. The outer end portion OE of the outer connection portion QC has a first portion OE1 connected to the coupling portion CN and second portions OE2 located on both sides of the first portion OE1 in the width direction and not connected to the coupling portion CN.

[0160] In the example shown in the lower diagram of FIG. 22, the outer connection portion QC of the third elastic deformation portion ET3 (third extension portion EL3) is formed to extend to both sides of the third linking portion CN3 in the width direction, which is perpendicular to the extension direction of the third linking portion CN3 (the axial direction of the central axis AX3). Specifically, the width WD4 of the outer connection portion QC along the width direction is greater than the width WD1 of the third linking portion CN3 along the same width direction. The outer end portion OE of the outer connection portion QC has a first portion OE1 connected to the third linking portion CN3 and a second portion OE2 located on both sides of the first portion OE1 in the width direction and not connected to the third linking portion CN3. The same applies to the outer connection portions QC of the first elastic deformation portion ET1 (first extension portion EL1), the second elastic deformation portion ET2 (second extension portion EL2), and the fourth elastic deformation portion ET4 (fourth extension portion EL4).

[0161] As described above, the lens driving device 100 according to the embodiment of the present disclosure includes, as shown in FIG. 2, a fixed member FB including a housing HS; a lens holding member 2 disposed inside the housing HS and having an opening 2K penetrating therethrough in the vertical direction through which a lens body LS can be placed; a plurality of independent leaf springs 6 provided to connect an upper portion of the lens holding member 2 to the fixed member FB while allowing the lens holding member 2 to move relative to the fixed member FB; and a drive unit DM for moving the lens holding member 2 relative to the fixed member FB. The housing HS includes a metal cover member 3 having an outer peripheral wall portion (upper outer peripheral wall portion 3A) and a top plate portion 3B. As shown in FIGS. 3 and 4, each of the plurality of leaf springs 6 includes a fixed support portion 6F fixed to the fixed member FB, a movable support portion 6M fixed to the upper portion of the lens holding member 2, and an elastically deformable elastic arm portion 6E provided to connect the fixed support portion 6F and the movable support portion 6M. The elastic arm portion 6E of each of the plurality of leaf springs 6 is disposed so as to face the top plate portion 3B of the cover member 3. An insulating member IM is provided between the elastic arm portion 6E of each of the plurality of leaf springs 6 and the top plate portion 3B. This configuration has the effect of suppressing short circuits between the plurality of leaf springs 6. For example, when one of the plurality of leaf springs 6 and another of the plurality of leaf springs 6 form different electrical paths, this configuration has the effect of preventing short circuits between the two electrical paths via the cover member 3.

[0162] 2, a metal plate-shaped member 1 serving as an insulating member IM may be fixed to the underside of the top panel portion 3B of the cover member 3. In this case, an insulating coating agent may be applied to the underside of the plate-shaped member 1. This configuration has the effect of making the plate-shaped member 1 thinner than when the plate-shaped member 1 is made of synthetic resin.

[0163] As shown in FIG. 2, the outer peripheral wall portion (upper outer peripheral wall portion 3A) of the cover member 3 may have four side plate portions (first upper side plate portion 3A1 to fourth upper side plate portion 3A4). The plate-shaped member 1 may have an upper plate portion 1B facing the top plate portion 3B and four bent portions 1A bent downward from the outer edge of the upper plate portion 1B. In this case, each of the four bent portions 1A may be configured to face a corresponding side plate portion (first upper side plate portion 3A1 to fourth upper side plate portion 3A4) of the cover member 3. This configuration has the effect of realizing positioning of the plate-shaped member 1 with respect to the cover member 3 by the bent portions 1A.

[0164] As shown in FIG. 2, the outer peripheral wall portion (upper outer peripheral wall portion 3A) of the cover member 3 may have side plate portions (first upper side plate portion 3A1 to fourth upper side plate portion 3A4) located outside at least one elastic arm portion 6E of the plurality of leaf springs 6. As shown in FIG. 2, the plate-shaped member 1 may have an upper plate portion 1B facing the top plate portion 3B of the cover member 3, and a bent portion 1A bent downward from the outer edge of the upper plate portion 1B and disposed between the elastic arm portion 6E and the side plate portions (first upper side plate portion 3A1 to fourth upper side plate portion 3A4). An insulating coating agent may be applied to the inner surface of the bent portion 1A. This configuration has the effect of preventing contact between the elastic arm portion 6E and the upper outer peripheral wall portion 3A of the cover member 3, even when the elastic arm portion 6E of the leaf spring 6 moves in a direction intersecting the vertical direction (Z-axis direction) due to an impact caused by, for example, dropping the lens driving device 100.

[0165] As shown in FIG. 2, the plate-shaped member 1 may be fixed to the cover member 3 with a conductive adhesive AD1 and an insulating adhesive AD2. This configuration has the effect that the conductive adhesive AD1 can make the potential of the plate-shaped member 1 and the potential of the cover member 3 the same (e.g., ground potential), and the insulating adhesive AD2 can increase the adhesive strength between the plate-shaped member 1 and the cover member 3. In the illustrated example, the cover member 3 is electrically connected to an external substrate or the like via the case member 4. Specifically, the cover member 3 is electrically connected to the external substrate or the like via a connection recess RS (see the upper diagram in FIG. 14 ), which functions as a terminal and is formed in the first lower side plate portion 4A1 of the case member 4. The connection recess RS is a portion formed by recessing a part of the first lower side plate portion 4A1 inward. More specifically, as shown in the upper diagram of Figure 14, the connection recess RS is electrically connected to an external substrate, etc. by soldering, a conductive adhesive, etc., together with the terminal portions of the first conductive member CM1 to the fifth conductive member CM5, the first fixed side terminal plate 5F1, and the second fixed side terminal plate 5F2, which are exposed to the outside through the first through hole 4H1 of the first lower side plate portion 4A1.

[0166] As shown in FIG. 19, the elastic arms 6E of the two leaf springs 6 have adjacent portions, and at least one of the two elastic arms 6E may have an insulating member IM, i.e., an adhesive agent AD3, applied at multiple locations. In this case, the insulating member IM may be made of a material other than adhesive, such as synthetic resin. This configuration prevents short circuits between the two elastic arms even if the elastic arm 6E is undesirably deformed by an impact, such as a fall. Furthermore, because the adhesive agent AD3 is not sticky after hardening, it does not adhere to the adjacent elastic arm 6E when it comes into contact with the adjacent elastic arm 6E.

[0167] In the portion where two elastic arms 6E are adjacent to each other, the adhesive AD3 may be provided on only one of the two elastic arms 6E as shown in Fig. 19, or may be provided on both of the two elastic arms 6E. A configuration in which the adhesive AD3 is provided on only one of the two elastic arms 6E brings about the effect of improving the production efficiency of the lens driving device 100 compared to a configuration in which the adhesive AD3 is provided on both of the two elastic arms 6E.

[0168] As shown in FIG. 19, adhesive AD3 may be applied to multiple locations on each elastic arm 6E of the multiple leaf springs 6 to prevent contact between the elastic arm 6E and the top plate 3B. In this case, the adhesive AD3 constitutes an insulating member IM. This configuration has the effect of preventing contact between the elastic arm 6E and the top plate 3B simply by applying the adhesive AD3 to the elastic arm 6E. Note that the adhesive AD3 does not have adhesiveness after hardening, so it does not adhere to the top plate 3B when it comes into contact with the top plate 3B.

[0169] 19, the elastic arm 6E may have a bent portion BP and an extending portion EP extending from the bent portion BP. In this case, the insulating member IM may be provided on the extending portion EP. This configuration has the advantage of having less effect on the spring constant of the leaf spring 6 than when the insulating member IM is provided on the bent portion BP, i.e., when adhesive AD3 is applied to the bent portion BP.

[0170] Furthermore, as shown in FIG. 2, a lens driving device 100 as an optical component driving device according to an embodiment of the present disclosure comprises a base member 8, an optical component holding member (lens holding member 2) having an opening 2K penetrating in the vertical direction in which an optical component (lens body LS) can be placed and movably arranged relative to the base member 8, a cover member 3 having a top plate portion 3B facing the base member 8 in the vertical direction across the optical component holding member (lens holding member 2) and an upper outer peripheral wall portion 3A including a plurality of upper side plate portions (first upper side plate portion 3A1 to fourth upper side plate portion 3A4) extending downward from the outer edge of the top plate portion 3B, and a plurality of shape memory alloy wires SA arranged inside the upper outer peripheral wall portion 3A, one end fixed to a fixed side member FB including the base member 8 and the other end fixed to a movable side member MB including the optical component holding member (lens holding member 2), and capable of moving the optical component holding member (lens holding member 2) relative to the base member 8. The fixed-side member FB includes a case member 4 that is open at the top and that houses a base member 8. The case member 4 has a bottom plate portion 4B that is arranged below the base member 8 and a plurality of lower side plates (first lower side plate portion 4A1 to fourth lower side plate portion 4A4) that extend upward from the outer edge of the bottom plate portion 4B. The lower side plates (first lower side plate portion 4A1 to fourth lower side plate portion 4A4) are located between the shape memory alloy wire SA and the upper side plates (first upper side plate portion 3A1 to fourth upper side plate portion 3A4) that constitute the upper outer peripheral wall portion 3A of the cover member 3, and face the shape memory alloy wire SA. This configuration has the effect of suppressing the occurrence of problems caused by contact between the shape memory alloy wire SA and the cover member 3, such as the shape memory alloy wire SA being pinched between the base member 8 and the cover member 3 when assembling the cover member 3. This is because the lower outer peripheral wall portion 4A of the case member 4 is present outside the shape memory alloy wire SA.

[0171] As shown in FIG. 18, a first point P1 at which one end of the shape memory alloy wire SA is fixed to the fixed-side member FB and a second point P2 at which the other end of the shape memory alloy wire SA is fixed to the movable-side member MB may be at different heights in the vertical direction. The lower side plates (first lower side plate 4A1 to fourth lower side plate 4A4) may extend to a position higher than a midpoint P3 between the first point P1 and the second point P2. This configuration allows at least the lower half of the shape memory alloy wire SA to be covered by the case member 4, thereby further reducing the occurrence of problems caused by contact between the shape memory alloy wire SA and the cover member 3 compared to when the height of the lower side plate is lower than the midpoint P3. Note that the lower side plate is not limited to a configuration in which the height is higher than the midpoint P3 throughout its entire area. For example, when there is a portion that does not face the shape memory alloy wire SA, the height of the lower side plate may be partially lower than the midpoint P3. The lower side plate portion may be configured so that portions higher than the midpoint P3 and portions lower than the midpoint P3 are alternately formed.

[0172] The lower outer peripheral wall portion 4A may have a lower angular plate portion 4C located between two adjacent lower side plates, as shown in Fig. 2. In this case, the lower angular plate portion 4C may extend to a position higher than the lower side plates, as shown in Fig. 18. This configuration has the effect of further suppressing the occurrence of defects caused by contact between the shape memory alloy wire SA and the cover member 3, since the position (downward movement) of the cover member 3 assembled to the case member 4 can be limited by the lower angular plate portion 4C.

[0173] The cover member 3 and the case member 4 are both formed from metal plates and may be electrically connected to each other. This configuration allows the cover member 3 and the case member 4 to be made thinner while maintaining their strength, compared to when the cover member 3 and the case member 4 are made from a material other than metal, thereby achieving a more compact optical component drive device. This configuration also provides the optical component drive device with a shielding function.

[0174] As shown in FIG. 5, one end of the shape memory alloy wire SA may be fixed to a fixed-side metal member 5F provided on the base member 8. As shown in FIG. 5, the other end of the shape memory alloy wire SA may be fixed to a movable-side metal member 5M provided on the optical component holding member (lens holding member 2). As shown in the upper diagram of FIG. 13, the fixed-side metal member 5F and the movable-side metal member 5M may face different portions of the lower outer peripheral wall portion 4A in a direction perpendicular to the up-down direction. The base member 8 may be formed of a synthetic resin and may have a fixing portion 8P adhesively fixed to the inner surface IF of the lower outer peripheral wall portion 4A as shown in the lower diagram of FIG. 13. As shown in FIGS. 14 and 15, the fixing portion 8P is disposed adjacent to the fixed-side metal member 5F between the fixed-side metal member 5F and the movable-side metal member 5M, and may have an adhesive reservoir portion AC formed by a groove portion 8G or an inclined portion 8C formed away from the inner surface IF of the lower outer peripheral wall portion 4A. In this case, the shape memory alloy wire SA may be configured to extend above the fixing portion 8P. That is, the fixing portion 8P having the adhesive reservoir AC may be configured to be located below the shape memory alloy wire SA. An adhesive AD4 may be provided between the adhesive reservoir AC and the inner surface IF of the lower outer peripheral wall portion 4A. As shown in FIGS. 16 and 17, this configuration can prevent the loosened shape memory alloy wire SA from getting caught in the gap even when the adhesive AD4 peels off from the base member 8 (fixing portion 8P) due to an impact caused by a fall or the like and remains attached only to the lower outer peripheral wall portion 4A of the case member 4, and a gap is formed between the base member 8 and the case member 4. That is, this configuration has the effect of preventing the loosened shape memory alloy wire SA from being pinched between the base member 8 and the case member 4 in the undesired state described above. Note that the inclined portion 8C constituting the adhesive reservoir AC does not need to be formed in a flat shape and may be formed in a curved shape.

[0175] The adhesive reservoir AC may extend in the vertical direction as shown in Figures 14 and 15. In this case, as shown in Figures 16 and 17, the depth DH of the adhesive reservoir AC in the direction perpendicular to the inner surface IF of the lower outer peripheral wall 4A (first lower side plate 4A1 to fourth lower side plate 4A4) to which the fixing portion 8P is adhesively fixed is configured to be larger than the diameter of the shape memory alloy wire SA. This configuration has the effect of preventing the loosened shape memory alloy wire SA from entering the gap between the base member 8 and the case member 4 by the adhesive AD (especially the hardened portion within the adhesive reservoir AC) attached to the lower outer peripheral wall 4A, even in the undesired state described above. Therefore, this configuration has the effect of further preventing the loosened shape memory alloy wire SA from being pinched between the base member 8 and the case member 4.

[0176] In the above-described configuration, when the optical component holding member (lens holding member 2) is in a neutral state, the outer surface EF1 of the fixed-side metal member 5F may be positioned closer to the inner surface IF of the lower outer peripheral wall portion 4A than the outer surface EF2 of the movable-side metal member 5M, as shown in the upper diagram of Fig. 13. In other words, even when the fixed-side metal member 5F is positioned closer to the lower outer peripheral wall portion 4A than the movable-side metal member 5M, the above-described configuration has the effect of preventing the shape memory alloy wire SA in a slack state from being pinched between the base member 8 and the case member 4.

[0177] 2, a lens driving device 100, which is an example of an optical component driving device according to an embodiment of the present disclosure, includes a fixed member FB, an optical component holding member (lens holding member 2) having an opening 2K penetrating the fixed member FB in the vertical direction through which an optical component (lens body LS) can be placed, a fixed support member 6F fixed to the fixed member FB, a movable support member 6M fixed to the optical component holding member (lens holding member 2), and a leaf spring 6 having an elastically deformable elastic arm 6E connected to the fixed support member 6F and the movable support member 6M, and a driving unit DM configured to move the optical component holding member (lens holding member 2) relative to the fixed member FB. A detachment portion TF, which is a part of a connecting portion CN connected to a removal portion RM, may be provided on the opening 2K side of the movable support member 6M, as shown in FIG. In this case, the tip of the detachment portion TF may be shaped so as to be inclined with respect to the plate surface PF of the movable support portion 6M. That is, the tip of the detachment portion TF may be formed so as to be twisted with respect to the plate surface PF. The reason why the tip of the detachment portion TF is inclined with respect to the plate surface PF is that the connecting portion CN is twisted when the removal portion RM is separated from the leaf spring 6. This configuration has the effect of improving the production efficiency of optical component driving devices compared to when the connecting portion is cut by bending it multiple times.

[0178] As shown in Fig. 21, the movable support member 6M may have an inner fixed portion FI provided adjacent to the outer side of the tear-off portion TF. The inner fixed portion FI is a portion fixed to the optical component holding member (lens holding member 2). In this case, the width WD1 of the tear-off portion TF (connecting portion CN) is smaller than the width WD2 of the inner fixed portion FI, as shown in the lower diagram of Fig. 20. This configuration has the effect of more reliably achieving the separation of the removal portion RM compared to a configuration in which the tear-off portion TF is provided at a position away from the inner fixed portion FI.

[0179] The inner fixing portion FI may be a portion that is fixed (held down) by a crimping fixing portion formed by inserting and crimping a protrusion 2T (see FIG. 3) formed on the optical component holding member (lens holding member 2) into a hole formed in the movable support portion 6M. This configuration has the advantage that the inner leaf spring 6B (movable support portion 6M) can be fixed to the lens holding member 2 more easily and reliably than when using an adhesive. However, fixing with an adhesive may also be used as a means for fixing the optical component holding member (lens holding member 2) and the movable support portion 6M.

[0180] As shown in the center diagram of FIG. 21, the movable support member 6M may have an outer fixed portion FE fixed to the optical component holding member (lens holding member 2). In this case, the inner fixed portion FI may correspond to the separation portion TF (connection portion CN). The elastic arm portion 6E may extend from between the inner fixed portion FI and the outer fixed portion FE. This configuration has the effect of preventing the force acting on the movable support member 6M when the connection portion CN is cut from adversely affecting the elastic arm portion 6E. Note that if the elastic arm portion 6E extends from a portion of the movable support member 6M located near the inner fixed portion FI, the outer fixed portion FE may be omitted.

[0181] Two of the plurality of cut-off portions TF in the leaf spring 6 may be provided at positions facing each other with the opening 2K in between, as shown in the upper diagram of Figure 21. In the illustrated example, the first cut-off portion TF1 and the fourth cut-off portion TF4 in the leaf spring 6 are provided at positions facing each other with the opening 2K in between. Similarly, the second cut-off portion TF2 and the third cut-off portion TF3 in the leaf spring 6 are provided at positions facing each other with the opening 2K in between. This configuration has the effect of facilitating the separation of the removal portion RM from the non-removal portion AM (leaf spring 6).

[0182] As shown in the upper diagram of FIG. 21 , the leaf spring 6 may have two adjacent inner fixed portions FI. In this case, the two detachment portions TF corresponding to the two adjacent inner fixed portions FI are formed so that their respective tips are inclined in opposite directions relative to the plate surface PF of the movable support portion 6M. In the example shown in FIG. 21 , the leaf spring 6 has a third inner fixed portion FI3 and a fourth inner fixed portion FI4 adjacent to each other. In this case, the tip of the third detachment portion TF3 corresponding to the third inner fixed portion FI3 is formed so as to be inclined in the direction indicated by arrow AR3 relative to the plate surface PF of the movable support portion 6MB3. The tip of the fourth detachment portion TF4 corresponding to the fourth inner fixed portion FI4 is formed so as to be inclined in the direction indicated by arrow AR4 relative to the plate surface PF of the movable support portion 6MB4. The directions indicated by arrow AR3 and arrow AR4 are opposite to each other. Specifically, the direction indicated by the arrow AR3 is a clockwise direction with respect to the central axis AX3 of the third connecting portion CN3 (third separation portion TF3) when viewed from the center of the opening 2K. The direction indicated by the arrow AR4 is a counterclockwise direction with respect to the central axis AX4 of the fourth connecting portion CN4 (fourth separation portion TF4) when viewed from the center of the opening 2K. In other words, the leaf spring 6 may have a first leaf spring and a second leaf spring. In this case, the movable support portion 6M of the first leaf spring and the movable support portion 6M of the second leaf spring may be disposed adjacent to each other in a top view along the vertical direction. The separation portion TF corresponding to the movable support portion 6M of the first leaf spring and the separation portion TF corresponding to the movable support portion 6M of the second leaf spring may be formed to twist in opposite directions with respect to the plate surface PF of the movable support portion 6M. In the example shown in Fig. 20, the leaf spring 6 has a third inner leaf spring 6B3 as the first leaf spring and a fourth inner leaf spring 6B4 as the second leaf spring. The movable support portions 6MB3 of the third inner leaf spring 6B3 and the movable support portions 6MB4 of the fourth inner leaf spring 6B4 are arranged adjacent to each other in a top view along the vertical direction. In this case, as shown in Fig. 21, the third separation portion TF3 corresponding to the movable support portion 6MB3 of the third inner leaf spring 6B3 and the fourth separation portion TF4 corresponding to the movable support portion 6MB4 of the fourth inner leaf spring 6B4 are formed to twist in opposite directions with respect to the plate surface PF of the movable support portion 6M.This configuration has the advantage that the removable portion RM can be easily separated even when two inner fixed portions FI are adjacent to each other. In the illustrated example, the third inner leaf spring 6B3 and the fourth inner leaf spring 6B4 are separated from each other, but they may also be connected. In other words, the third inner leaf spring 6B3 and the fourth inner leaf spring 6B4 may form a single conductive path.

[0183] A manufacturing method for an optical component driving device according to an embodiment of the present disclosure includes the steps of: fixing a movable support member 6M to an optical component holding member (lens holding member 2) so that a removal portion RM, which is a part of a workpiece WK, is positioned in an opening 2K; and moving a main body portion MP relative to the movable support member 6M in a direction intersecting (substantially perpendicular to) the plate surface of the main body portion MP, thereby twisting the connection portion CN provided inside the movable support member 6M and severing the connection portion CN. The inside of the movable support member 6M is connected to the removal portion RM via the connection portion CN. The removal portion RM includes the main body portion MP and an elastically deformable elastic deformation portion ET provided between the main body portion MP and the connection portion CN. In this manufacturing method, the connection portion CN can be severed simply by moving the main body portion MP of the removal portion RM relative to the non-removal portion AM (leaf spring 6). Therefore, this manufacturing method has the effect of improving the production efficiency of optical component driving devices.

[0184] As shown in Fig. 20, the movable support member 6M may have an inner fixed portion FI provided adjacent to the connecting portion CN. The inner fixed portion FI is a portion that is fixed to the optical component holding member (lens holding member 2). In this case, the width WD1 of the connecting portion CN along the width direction perpendicular to the direction in which the connecting portion CN extends is smaller than the width WD2 of the inner fixed portion FI along the width direction, as shown in the lower diagram of Fig. 20. This configuration has the effect of more reliably achieving separation of the removal portion RM from the non-removal portion AM (leaf spring 6) compared to a configuration in which the connection portion CN is provided at a position away from the inner fixed portion FI.

[0185] The elastic deformation portion ET may have an extension portion EL extending in a direction intersecting the extension direction of the connecting portion CN. In this case, a portion of the extension portion EL may be located on an extension line on the inside of the connecting portion CN. In the example shown in FIG. 20, the third elastic deformation portion ET3 has a third extension portion EL3 extending in a direction intersecting the extension direction of the third connecting portion CN3 (the axial direction of the central axis AX3). In this case, a portion of the third extension portion EL3 is located on an extension line on the inside of the third connecting portion CN3 (the axial line of the central axis AX3). This configuration has the effect of concentrating stress generated when the elastic deformation portion ET is elastically deformed to the connecting portion CN.

[0186] As shown in the upper diagram of FIG. 20, the elastically deformable portion ET may be U-shaped, with one end connected to the connecting portion CN and the other end connected to the main portion MP. In this case, the width WD3 of the portion connected to the main portion MP is greater than the width WD4 of the portion connected to the connecting portion CN (see the lower diagram of FIG. 20). In other words, as shown in FIG. 22, the extending portion EL of the elastically deformable portion ET may have a bending portion BD, an outer extending portion UE connected to one end of the bending portion BD, and an inner extending portion UI connected to the other end of the bending portion BD and extending along the outer extending portion UE. In this case, the inner extending portion UI may be connected to the main portion MP via a portion (inner connecting portion QA) having a width greater than the width of the connecting portion CN. This configuration has the effect of concentrating stress generated when the elastically deformable portion ET is elastically deformed at the connecting portion CN.

[0187] As shown in the lower diagram of Figure 22, the elastic deformation portion ET may have an outer connection portion QC between the extension portion EL and the connecting portion CN, connecting the extension portion EL and the connecting portion CN. In this case, the width WD4 of the outer connection portion QC along the width direction, which is perpendicular to the extension direction of the connecting portion CN (the axial direction of the central axis AX3), is larger than the width WD1 of the connecting portion CN along the same width direction. The outer end portion OE of the outer connection portion QC has a first portion OE1 connected to the connecting portion CN and a second portion OE2 located on both sides of the first portion OE1 in the width direction and not connected to the connecting portion CN. This configuration ensures that the connecting portion CN is twisted more reliably, thereby ensuring that the removable portion RM is separated from the non-removable portion AM (leaf spring 6) of the connecting portion CN more reliably.

[0188] As shown in the upper diagram of FIG. 20 , the workpiece WK may include two connecting portions CN that face each other across the main body portion MP. In this case, each of the two connecting portions CN is connected to the inside of the corresponding movable support portion 6M. In the illustrated example, the workpiece WK includes a first connecting portion CN1 and a fourth connecting portion CN4 that face each other across the main body portion MP, and a second connecting portion CN2 and a third connecting portion CN3 that face each other across the main body portion MP. In this case, the first connecting portion CN1 is connected to the inside of the corresponding movable support portion 6MB1. The second connecting portion CN2 is connected to the inside of the corresponding movable support portion 6MB2. The third connecting portion CN3 is connected to the inside of the corresponding movable support portion 6MB3. The fourth connecting portion CN4 is connected to the inside of the corresponding movable support portion 6MB4. This configuration makes the connecting portions CN easier to twist, which in turn makes the connecting portions CN easier to cut. In this configuration, when the main body MP is moved in the up-down direction, a pair of coupling parts CN (first coupling part CN1 and fourth coupling part CN4) that face each other across the main body MP are twisted in opposite directions, and another pair of coupling parts CN (second coupling part CN2 and third coupling part CN3) that face each other across the main body MP are twisted in opposite directions. Also, a pair of adjacent coupling parts CN (first coupling part CN1 and second coupling part CN2) are twisted in opposite directions, and another pair of adjacent coupling parts CN (third coupling part CN3 and fourth coupling part CN4) are twisted in opposite directions.

[0189] A hole MH may be formed in the main body portion MP. In this case, the step of cutting the connecting portion CN may include a step of engaging a jig (not shown) with the hole MH to move the main body portion MP. Specifically, the step of cutting the connecting portion CN may include a step of hooking a jig into the hole MH and pulling up the main body portion MP, or a step of inserting a jig into the hole MH from below the main body portion MP and pushing up the main body portion MP. This configuration has the effect of making it easy to move the main body portion MP using the hole MH formed in the main body portion MP. Therefore, this configuration has the effect of making it easy to twist the connecting portion CN, and ultimately making it easy to separate the removal portion RM from the non-removal portion AM (leaf spring 6).

[0190] 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, nor is it limited to the embodiments described below. Various modifications and substitutions may be applied to the above-described or below-described embodiments without departing from the scope of the present invention. Furthermore, the features described with reference to the above-described or below-described embodiments may be combined as appropriate unless technically inconsistent.

[0191] For example, in the above-described embodiment, the outer leaf spring 6A is used as a conductive path to the shape memory alloy wire SA and the inner leaf spring 6B is used as a conductive path to the electrical device, but the inner leaf spring 6B may be used as a conductive path to the shape memory alloy wire SA and the outer leaf spring 6A may be used as a conductive path to the electrical device.

[0192] Furthermore, in the above-described embodiment, the fixed-side metal member 5F is fixed to the base member 8 with an adhesive, but it may be embedded in the base member 8 or may be a conductive pattern formed on the surface of the base member 8. Similarly, the movable-side metal member 5M is fixed to the lens holding member 2 with an adhesive, but it may be embedded in the lens holding member 2 or may be a conductive pattern formed on the surface of the lens holding member 2.

[0193] This application claims priority based on Japanese Patent Application No. 2022-094559, filed on June 10, 2022, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0194] REFERENCE SIGNS LIST 1 Plate-like member 1A Bent portion 1A1 First bent portion 1A2 Second bent portion 1A3 Third bent portion 1A4 Fourth bent portion 1B Upper plate portion 2 Lens holding member 2D Movable-side base portion 2D1 First movable-side base portion 2D2 Second movable-side base portion 2K Opening 2P Cylindrical portion 2S Protruding portion 2S1 First protruding portion 2S2 Second protruding portion 2T Protruding portion 2U Protruding portion 2V Receiving surface 3 Cover member 3A Upper outer peripheral wall portion 3A1 First upper side plate portion 3A2 Second upper side plate portion 3A3...Third upper side plate part 3A4...Fourth upper side plate part 3B...Top plate part 3C...Upper corner plate part 3C1...First upper corner plate part 3C2...Second upper corner plate part 3C3...Third upper corner plate part 3C4...Fourth upper corner plate part 3K...Opening 4...Case member 4A...Lower outer peripheral wall part 4A1...First lower side plate part 4A2...Second lower side plate part 4A3...Third lower side plate part 4A4...Fourth lower side plate part 4B...Bottom plate part 4C...Lower corner plate part 4C1...First lower side plate part 4C2...Second lower corner plate part 4C3...Third lower corner plate portion 4C4...Fourth lower corner plate portion 4H...Through hole 4H1...First through hole 4H2...Second through hole 4K...Opening 5...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 5F5...Fifth fixed side terminal plate 5F6...Sixth fixed side terminal plate 5F7...Seventh fixed side terminal plate 5F8...Eighth fixed side terminal plate 5M...Movable side metal member 5M1...First movable side terminal plate 5M2...Second movable side terminal plate 5M3...Third movable side terminal plate 5M4···Fourth movable terminal plate 6···Leaf spring 6A···Outer leaf spring 6A1···First outer leaf spring 6A2···Second outer leaf spring 6B···Inner leaf spring 6B1···First inner leaf spring 6B2···Second inner leaf spring 6B3···Third inner leaf spring 6B4···Fourth inner leaf spring6E, 6EA1, 6EA11, 6EA12, 6EA2, 6EA21, 6EA22, 6EB1, 6EB2, 6EB3, 6EB4...Elastic arm part 6F, 6FA1, 6FA11, 6FA12, 6FA2, 6FA21, 6FA22, 6FB1, 6FB2, 6FB3, 6FB4...Fixed support part 6M, 6MA1, 6MA2, 6MB1, 6MB2, 6MB3, 6MB4...Movable support part 8...Base member 8C...Slope part 8C2...Left side slope part 8C21...First left side slope part 8C22...Second left side slope part 8C4...Right side slope part 8C41...First right side slope part 8C42...Second right side inclined part 8G...Groove part 8G1...Front side groove part 8G11···First front gutter section 8G12···Second front gutter section 8G3···Rear gutter section 8G31···First rear gutter section 8G32···Second rear gutter section 8D···Fixed side base section 8D1···First fixed side base section 8D2···Second fixed side base section 8E···Side section 8E1···First side section 8E2···Second side section 8E3···Third side section 8E4···Fourth side section 8K···Opening 8P···Fixed section 8P1···First fixed section 8P1E···Outer surface 8P2···Second fixed section 8P2E···Outer surface 8P3···Third fixed section 8P3E···Outer surface 8P4···Fourth fixing part 8P4E···Outer surface 8T···Protruding part 8U···Protruding part 8V···Receiving surface 100···Lens drive unit AC···Adhesive reservoir AC1···Front adhesive reservoir AC11···First front adhesive reservoir AC12···Second front adhesive reservoir AC2···Left adhesive reservoir AC21···First left adhesive reservoir AC22···Second left adhesive reservoir AC3···Rear adhesive reservoir AC31···First rear adhesive reservoir AC32···Second rear adhesive reservoir AC4···Right adhesive reservoir AC41···First right adhesive reservoir AC42···Second right adhesive reservoir AD1···Conductive adhesive AD2···Insulating adhesive AD3, AD4···Adhesive AM···Non-removable part BD···Bending part BP···Bending part CM···Conductive member CM1···First conductive member CM2···Second conductive member CM3···Third conductive member CM4···Fourth conductive member CM5···Fifth conductive member CM6···Sixth conductive member CM7···Seventh conductive memberCM8···8th Conductive Component CM9···9th Conductive Component CM10···10th Conductive Component CN···Connecting Part CN1···1st Connecting Part CN2···2nd Connecting Part CN3···3rd Connecting Part CN4···4th Connecting Part DM···Motion Part DP···Vibration Damping Part EL···Extension Part EL1···1st Extension Part EL2···2nd Extension Part EL3···3rd Extension Part EL4···4th Extension Part EP···Extension Part ET···Elastic Shaping Part ET1···1st Elastic Shaping Part ET2···2nd Elastic deformation part ET3···3rd elastic deformation part ET4···4th elastic deformation part FB···Fixed side part FI···Inner fixing part FI1···1st inner fixing part FI2···2nd inner fixing part FI3···3rd inner fixing part FI4···4th inner fixing part FE···Outer fixing part FE1···1st outer fixing part FE2···2nd outer fixing part FE3···3rd outer fixing part FE4···4th outer fixing part FP···Front removal part HS···Basin body IF···Inner surface IM···Insulation part I S···Pixel J1~J4···Holding Part LC···Cut Line LS···Lens Body MB···Modible Side Material MG···Magnet MG1···First Magnet MG2···Second Magnet MH···Hole MP···Body Part OA···Optical Axis OE···Outer End OE1···First Part OE2···Second Part PF···Plate Surface PM, PM1, PM2, PM11···Plate Part QA···Inner Connection Part QC···Outer Connection Part RM···Removal Part RP···Rear Removal Part RS···Connection Recess S A···Shape memory alloy stainless steel SA1···The first stainless steel SA2···The second stainless steel alloy SA3···The third stainless steel alloy SA4 ···The 4th Safety SA5···The 5th Safety SA6···The 6th Safety SA7···The 7th Safety SA8···The 8th Safety Cutting TF···Cutting part TF1···1st cutting part TF2···2nd cutting part TF3···3rd cutting part TF4···4th cutting part TP···Protrusion UE···Outer extension part UI···Inside extension part WK···Worked material

Claims

1. A base member; an optical component holding member having an opening penetrating in the vertical direction in which an optical component can be placed, the optical component holding member being movably provided with respect to the base member; a cover member having a top plate portion facing the base member in the up-down direction with the optical component holding member sandwiched therebetween, and an upper outer peripheral wall portion including a plurality of upper side plate portions extending downward from an outer edge of the top plate portion; a plurality of shape memory alloy wires disposed inside the upper outer peripheral wall portion, one end of which is fixed to a fixed-side member including the base member and the other end of which is fixed to a movable-side member including the optical component holding member, and which move the optical component holding member relative to the base member, the fixed-side member includes a case member that is open at the top and that houses the base member, the case member has a bottom plate portion disposed below the base member and a lower outer peripheral wall portion including a plurality of lower side plate portions extending upward from an outer edge of the bottom plate portion, the lower side plate portion is located between the shape memory alloy wire and the upper side plate portion constituting the upper outer peripheral wall portion of the cover member, and faces the shape memory alloy wire, a first point at which the one end of the shape memory alloy wire is fixed to the fixed-side member and a second point at which the other end of the shape memory alloy wire is fixed to the movable-side member are at different heights in the vertical direction; The lower side plate portion extends to a position higher than the midpoint between the first point and the second point. Optical component drive device.

2. A base member, an optical component holding member having an opening penetrating in the vertical direction in which an optical component can be placed, the optical component holding member being movably provided with respect to the base member; a cover member having a top plate portion facing the base member in the up-down direction with the optical component holding member sandwiched therebetween, and an upper outer peripheral wall portion including a plurality of upper side plate portions extending downward from an outer edge of the top plate portion; a plurality of shape memory alloy wires disposed inside the upper outer peripheral wall portion, one end of which is fixed to a fixed-side member including the base member and the other end of which is fixed to a movable-side member including the optical component holding member, and which move the optical component holding member relative to the base member, the fixed-side member includes a case member that is open at the top and that houses the base member, the case member has a bottom plate portion disposed below the base member and a lower outer peripheral wall portion including a plurality of lower side plate portions extending upward from an outer edge of the bottom plate portion, the lower side plate portion is located between the shape memory alloy wire and the upper side plate portion constituting the upper outer peripheral wall portion of the cover member, and faces the shape memory alloy wire, the lower outer peripheral wall portion has a square plate portion located between two adjacent lower side plate portions, The square plate portion extends to a position higher than the lower side plate portion. Optical component drive device.

3. A base member, an optical component holding member having an opening penetrating in the vertical direction in which an optical component can be placed, the optical component holding member being movably provided with respect to the base member; a cover member having a top plate portion facing the base member in the up-down direction with the optical component holding member sandwiched therebetween, and an upper outer peripheral wall portion including a plurality of upper side plate portions extending downward from an outer edge of the top plate portion; a plurality of shape memory alloy wires disposed inside the upper outer peripheral wall portion, one end of which is fixed to a fixed-side member including the base member and the other end of which is fixed to a movable-side member including the optical component holding member, and which move the optical component holding member relative to the base member, the fixed-side member includes a case member that is open at the top and that houses the base member, the case member has a bottom plate portion disposed below the base member and a lower outer peripheral wall portion including a plurality of lower side plate portions extending upward from an outer edge of the bottom plate portion, the lower side plate portion is located between the shape memory alloy wire and the upper side plate portion constituting the upper outer peripheral wall portion of the cover member, and faces the shape memory alloy wire, The cover member and the case member are both formed of metal plates and are electrically connected to each other. Optical component drive device.

4. A base member, an optical component holding member having an opening penetrating in the vertical direction in which an optical component can be placed, the optical component holding member being movably provided with respect to the base member; a cover member having a top plate portion facing the base member in the up-down direction with the optical component holding member sandwiched therebetween, and an upper outer peripheral wall portion including a plurality of upper side plate portions extending downward from an outer edge of the top plate portion; a plurality of shape memory alloy wires disposed inside the upper outer peripheral wall portion, one end of which is fixed to a fixed-side member including the base member and the other end of which is fixed to a movable-side member including the optical component holding member, and which move the optical component holding member relative to the base member, the fixed-side member includes a case member that is open at the top and that houses the base member, the case member has a bottom plate portion disposed below the base member and a lower outer peripheral wall portion including a plurality of lower side plate portions extending upward from an outer edge of the bottom plate portion, the lower side plate portion is located between the shape memory alloy wire and the upper side plate portion constituting the upper outer peripheral wall portion of the cover member, and faces the shape memory alloy wire, the one end of the shape memory alloy wire is fixed to a fixed metal member provided on the base member, the other end is fixed to a movable metal member provided on the optical component holding member, the fixed-side metal member and the movable-side metal member face different portions of the lower outer peripheral wall portion in a direction perpendicular to the up-down direction, the base member is made of synthetic resin and has a fixing portion that is adhesively fixed to the inner surface of the lower outer peripheral wall portion, the fixed portion is disposed adjacent to the fixed metal member and has an adhesive reservoir formed by a groove or an inclined portion that is spaced apart from the inner surface of the lower outer peripheral wall portion, The shape memory alloy wire extends above the fixing portion, An adhesive is provided between the adhesive reservoir and the inner surface of the lower outer peripheral wall portion. Optical component drive device.

5. The adhesive reservoir extends in the vertical direction, a depth of the adhesive reservoir in a direction perpendicular to the inner surface of the lower outer peripheral wall portion to which the fixing portion is adhesively fixed is greater than a diameter of the shape memory alloy wire; 5. The optical component driving device according to claim 4.

6. When the optical component holding member is in a neutral state, the outer surface of the fixed metal member is located closer to the inner surface of the lower outer peripheral wall portion than the outer surface of the movable metal member.

5. The optical component driving device according to claim 4.

7. An optical component driving device according to any one of claims 1 to 6; a lens body as the optical component held by the optical component holding member; an imaging element disposed opposite the lens body, Camera module.

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