WO2022209645A1

WO2022209645A1 - Camera module

Info

Publication number: WO2022209645A1
Application number: PCT/JP2022/010138
Authority: WO
Inventors: 勝彦大友; 清行伊藤; 昌仁生井
Original assignee: アルプスアルパイン株式会社
Priority date: 2021-03-31
Filing date: 2022-03-08
Publication date: 2022-10-06
Also published as: JPWO2022209645A1; CN117120923A

Abstract

A camera module (MD) comprises: a fixed side member (FB); a lens holding body (20) capable of holding a lens body; an imaging element holding body (2) with which an imaging element (IS) disposed to face the lens body is provided integrally; an imaging element driving part (DM1) which moves the imaging element holding body (2) with respect to the fixed side member (FB); and a lens driving part (DM2) which moves the lens holding body (20) with respect to the fixed side member (FB). The imaging element driving part (DM1) is configured to include eight shape-memory alloy wires (SA) provided between a first movable side member (MB1) including the imaging element holding body (2) and the fixed side member (FB).

Description

The camera module

The present disclosure relates to camera modules.

Conventionally, there has been known a camera module including a voice coil motor as an image pickup device driving section configured to move an image sensor (image pickup device) by a magnet and a coil (see Patent Document 1).

Japanese Patent Application Laid-Open No. 2020-170170

However, there is a risk that the size of this imaging element drive unit will increase because it is driven by magnets and coils.

Therefore, it is desirable to provide a camera module that includes a smaller-sized imaging device drive unit.

A camera module according to an embodiment of the present invention is an imaging element holding body integrally provided with a fixed side member, a lens holding body capable of holding a lens body, and an imaging element arranged facing the lens body. and a first driving section for moving the lens holder with respect to the stationary member, the camera module comprising: a second driving section for moving the imaging element holder with respect to the stationary member The second driving section includes a plurality of first shape memory alloy wires provided between a first movable side member including the imaging element holder and the fixed side member.

The camera module described above can achieve a smaller size than a configuration that uses a voice coil motor as an imaging device drive unit.

Fig. 2 is a top perspective view of the camera module; FIG. 3 is a bottom perspective view of the camera module; 1 is an exploded perspective view of a camera module; FIG. FIG. 3 is a perspective view of an imaging element holder, an elastic metal member, and a base member; FIG. 4 is a perspective view of a metal member connected to an imaging element holder; 4 is a perspective view of a metal member connected to the base member; FIG. 1 is a diagram of a metal member to which a shape memory alloy wire is attached; FIG. 1 is a diagram of a metal member to which a shape memory alloy wire is attached; FIG. It is a perspective view of a base member. 1 is a perspective view of an elastic metal member, a shape memory alloy wire, a metal member, and a conductive member; FIG. FIG. 4 is a top view of an elastic metal member, a metal member, and a conductive member; FIG. 4 is a diagram showing an example of a path of current flowing through a shape memory alloy wire; FIG. 10 is a diagram showing another example of a path of current flowing through a shape memory alloy wire; FIG. 10 is a table showing expansion and contraction states of shape memory alloy wires when each of six degrees of freedom of movement of an imaging element holder is realized; FIG. FIG. 4A is a top view, a front view, a rear view, a left side view, and a right side view of an imaging element holder and a base member which are connected by a shape memory alloy wire; FIG. 3 is a top view of an imaging element holder and a base member; FIG. 3 is a top view of an imaging element holder and a base member; FIG. 2 is a front view of an imaging device holder and a base member; FIG. 2 is a front view of an imaging device holder and a base member; 4 is a right side view of the imaging element holder and the base member; FIG. FIG. 3 is a top view of an imaging element holder and a base member; It is an exploded perspective view of a lens drive. 4 is a perspective view of a lens body, a lens holder, an upper elastic metal member, and an upper base member; FIG. 4 is a perspective view of an upper metal member connected to the lens holder; FIG. 4 is a perspective view of an upper metal member connected to an upper base member; FIG. FIG. 10 is a view of an upper metal member with an upper shape memory alloy wire attached; FIG. 10 is a view of an upper metal member with an upper shape memory alloy wire attached; FIG. 4 is a perspective view of an upper base member; FIG. 4 is a perspective view of an upper elastic metal member, an upper shape memory alloy wire, an upper metal member, and a conductive member; FIG. 4 is a top view of an upper elastic metal member, an upper metal member, and a conductive member; FIG. 4 is a diagram showing an example of a path of current flowing through an upper shape memory alloy wire; FIG. 10 is a diagram showing another example of a path of current flowing through the upper shape memory alloy wire; FIG. 3 is a perspective view of the imaging element holder, the base member, the lens holder, and the upper base member when viewed obliquely from the upper right. FIG. 3 is a perspective view of an imaging element holder, a base member, a lens holder, and an upper base member when viewed obliquely from the upper left; 1 is a perspective view of a metal member, a shape memory alloy wire, an upper metal member, an upper shape memory alloy wire, and a conductive member; FIG. FIG. 4A is a top view of the metal member, the shape memory alloy wire, the upper metal member, the upper shape memory alloy wire, and the conductive member; It is a figure which shows a movement of a lens body and an image pick-up element. It is a figure which shows a movement of a lens body and an image pick-up element. It is a figure which shows a movement of a lens body and an image pick-up element. It is a figure which shows a movement of a lens body and an image pick-up element. It is a figure which shows a movement of a lens body and an image pick-up element.

A camera module MD according to an embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are perspective views of the camera module MD. Specifically, FIG. 1A is a top perspective view of the camera module MD, and FIG. 1B is a bottom perspective view of the camera module MD. FIG. 2 is an exploded perspective view of the camera module MD. 1A, 1B, and 2, illustration of the lens body LS (see FIG. 18) is omitted.

　In Figures 1A, 1B, and 2, X1 represents one direction of the X-axis that constitutes the three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X-axis. Y1 represents one direction of the Y-axis forming the three-dimensional orthogonal coordinate system, and Y2 represents the other direction of the Y-axis. Similarly, Z1 represents one direction of the Z-axis forming the three-dimensional orthogonal coordinate system, and Z2 represents the other direction of the Z-axis. 1A, 1B, and 2, the X1 side of the camera module MD corresponds to the front side (front side) of the camera module MD, and the X2 side of the camera module MD corresponds to the rear side (back side) of the camera module MD. corresponds to The Y1 side of the camera module MD corresponds to the left side of the camera module MD, and the Y2 side of the camera module MD corresponds to the right side of the camera module MD. The Z1 side of the camera module MD corresponds to the upper side (subject side) of the camera module MD, and the Z2 side of the camera module MD corresponds to the lower side (image sensor side) of the camera module MD. The same applies to other drawings.

The camera module MD, as shown in FIGS. 1A, 1B, and 2, includes a cover member 4 that is part of the fixed side member FB.

The cover member 4 is configured to function as part of the housing HS that covers each member. In this embodiment, the cover member 4 is made of non-magnetic metal. However, the cover member 4 may be made of a magnetic metal.

In the example shown in FIGS. 1A and 1B, the cover member 4 includes a rectangular tubular outer peripheral wall portion 4A and a rectangular annular flat plate shape provided so as to be continuous with the upper end (Z1 side end) of the outer peripheral wall portion 4A. and a top plate portion 4B. A circular opening 4k is formed in the center of the top plate portion 4B. The outer peripheral wall portion 4A includes a first side plate portion 4A1 to a fourth side plate portion 4A4. The first side plate portion 4A1 and the third side plate portion 4A3 face each other, and the second side plate portion 4A2 and the fourth side plate portion 4A4 face each other. The first side plate portion 4A1 and the third side plate portion 4A3 extend perpendicularly to the second side plate portion 4A2 and the fourth side plate portion 4A4.

The cover member 4 is joined to the base member 8 with an adhesive, as shown in FIGS. 1A and 1B. The base member 8 constitutes a housing HS together with the cover member 4 .

As shown in FIG. 2, the housing HS accommodates the lens driving device LD, the imaging device driving device ID, and the like. The imaging device driving device ID is a device for moving the first movable side member MB1, and includes an imaging device driving section DM1, an imaging device holder 2, a metal member 5, and an elastic metal member 6. A flexible substrate 3 is attached to the lower surface (surface on the Z2 side) of the base member 8 that constitutes the housing HS. In FIG. 1A, for the sake of clarity, the imaging element IS is provided with a cross pattern, the flexible substrate 3 is provided with a coarse dot pattern, and the circuit board 7 is provided with a fine dot pattern.

The imaging element drive unit DM1 includes a shape memory alloy wire SA, which is an example of a shape memory actuator. In this embodiment, the shape memory alloy wires SA include first wires SA1 to eighth wires SA8 having substantially the same length and substantially the same diameter. The shape memory alloy wire SA increases in temperature when current flows, and contracts according to the increase in temperature. The image pickup device driver DM1 can move the image pickup device holder 2 using contraction of the shape memory alloy wire SA. As for the shape memory alloy wires SA, when one or more of the first wires SA1 to SA8 contract, the imaging device holder 2 moves, and the movement causes another one or more to be elongated. (decompressed).

In the present embodiment, the imaging element driving section DM1 is configured to allow the first movable side member MB1 to move with six degrees of freedom. The movements with six degrees of freedom are translation in a first direction (Z-axis direction) parallel to a first rotation axis RX1 perpendicular to the imaging surface of the image sensor IS, and movement in a second direction (X-axis direction) perpendicular to the first direction. translation, translation in a third direction (Y-axis direction) perpendicular to the first and second directions, rotation about the first direction (Z-axis direction), rotation about a second direction (X-axis direction), and , including rotation about a third direction (the Y-axis direction). The second direction (X-axis direction) is a direction parallel to the second rotation axis RX2, and the third direction (Y-axis direction) is a direction parallel to the third rotation axis RX3. The imaging surface of the imaging device IS is a plane parallel to the upper surface of the imaging device IS on the subject side.

The flexible substrate 3 is a flexible substrate on which a wiring pattern is formed for connecting the camera module MD and a device outside the camera module MD. In this embodiment, the flexible substrate 3 is a flexible printed circuit board configured to be repeatedly deformable.

The circuit board 7 is a board on which the imaging device IS is mounted. In this embodiment, the circuit board 7 is a rigid circuit board.

The first movable side member MB1 is a member that is driven by the imaging element driving section DM1. In this embodiment, the first movable side member MB1 is composed of the image sensor IS, the circuit board 7 on which the image sensor IS is mounted, and the image sensor holder 2 capable of holding the circuit board 7 .

The imaging element holder 2 is formed by injection molding synthetic resin such as liquid crystal polymer (LCP). Specifically, as shown in FIG. 2, the imaging element holder 2 includes a frame 2F that is substantially rectangular in top view, and movable side pedestals formed at two of the four corners of the frame 2F. It includes a portion 2D and projecting portions 2S formed at the remaining two of the four corners of the frame 2F. In this embodiment, the circuit board 7 is configured to be bonded to the lower surface of the frame 2F with an adhesive.

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 so as to face each other with the first rotation axis RX1 interposed therebetween. Similarly, the projecting portion 2S includes a first projecting portion 2S1 and a second projecting portion 2S2. The first projecting portion 2S1 and the second projecting portion 2S2 are arranged to face each other with the first rotation axis RX1 interposed therebetween. Specifically, the movable-side pedestal portion 2D and the protruding portion 2S are arranged so as to correspond to the four corners of the imaging element holding body 2 (frame body 2F) having a substantially rectangular outer shape when viewed from above. Moreover, they are arranged so as to be alternately arranged. A part of the elastic metal member 6 is placed on each of the two movable-side pedestals 2D, as shown in FIG.

FIG. 3 is a perspective view of the elastic metal member 6 connected to the image pickup device holder 2 and the base member 8. The positional relationship between the image pickup device holder 2 and the base member 8 and the elastic metal member 6 is shown in FIG. is shown. In FIG. 3, for clarity, the imaging device holder 2 has a fine dot pattern and the base member 8 has a coarse dot pattern. 3, illustration of members other than the imaging element holder 2, the elastic metal member 6, and the base member 8 is omitted for clarity.

The elastic metal member 6 is configured to movably support the imaging element holder 2 with respect to the fixed side member FB (base member 8). In this embodiment, the elastic metal member 6 is made of a conductive metal plate mainly made of, for example, a copper alloy, a titanium-copper alloy (titanium-copper), or a copper-nickel alloy (nickel-tin-copper). there is

The base member 8 is formed by injection molding using synthetic resin such as liquid crystal polymer (LCP). In this embodiment, as shown in FIG. 2, the base member 8 has a substantially rectangular outline in top view and has an opening 8K in the center. Specifically, the base member 8 has four side portions 8E (first side portion 8E1 to fourth side portion 8E4) arranged to surround the opening 8K.

Specifically, the base member 8 includes fixed side pedestals 8D formed at two of the four corners of the base member 8, as shown in FIG. The fixed-side pedestal portion 8D protrudes upward (in the Z1 direction) from the plate-like base portion of 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. The first fixed side seat portion 8D1 and the second fixed side seat portion 8D2 are arranged so as to face each other with the first rotation axis RX1 interposed therebetween. Further, as shown in FIG. 3, the first fixed side pedestal portion 8D1 is arranged so as to face the first projecting portion 2S1 of the image pickup element holder 2, and the second fixed side pedestal portion 8D2 is arranged to face the image pickup element holding portion 8D2. It is arranged so as to face the second projecting portion 2S2 of the body 2. As shown in FIG. Further, at each of the four corners of the base member 8, a connecting portion CN, which is a member for connecting the upper base member 80 (see FIG. 17) of the lens driving device LD and the base member 8, is formed. there is The connecting portion CN includes a first connecting portion CN1 to a fourth connecting portion CN4.

The elastic metal member 6 is configured to connect the movable-side pedestal portion 2D formed on the imaging element holder 2 and the fixed-side pedestal portion 8D formed on the base member 8 . Specifically, as shown in FIG. 3, the elastic metal member 6 includes a first fixed portion 6e1 attached to a first fixed-side pedestal portion 8D1 formed on the base member 8, and an elastic metal member 6 formed on the imaging element holder 2. a second fixed portion 6e2 attached to the first movable side pedestal portion 2D1; a third fixed portion 6e3 attached to the second fixed side pedestal portion 8D2 formed on the base member 8; and a fourth fixing portion 6e4 attached to the second movable side pedestal portion 2D2. As shown in FIG. 3, the elastic metal member 6 includes an elastically deformable first arm portion 6g1 connecting the first fixing portion 6e1 and the second fixing portion 6e2, a second fixing portion 6e2 and a third fixing portion 6e3. an elastically deformable second arm portion 6g2 that connects the third fixing portion 6e3 and the fourth fixing portion 6e4, and an elastically deformable third arm portion 6g3 that connects the fourth fixing portion 6e4 and the first fixing portion 6e1 It has an elastically deformable fourth arm portion 6g4 that connects the .

The metal member 5 is configured so that the end of the shape memory alloy wire SA is fixed. In this embodiment, the metal member 5 includes a fixed side metal member 5F and a movable side metal member 5M, as shown in FIG. The stationary metal member 5</b>F is configured to be fixed to the stationary pedestal portion 8</b>D of the base member 8 . The movable-side metal member 5</b>M is configured to be fixed to the movable-side pedestal portion 2</b>D of the imaging element holder 2 .

More specifically, the fixed-side metal member 5F is also called a fixed-side terminal plate, and includes a first fixed-side terminal plate 5F1 to an eighth fixed-side terminal plate 5F8. The movable-side metal member 5M is also called a movable-side terminal plate, and includes a first movable-side terminal plate 5M1 and a second movable-side terminal plate 5M2.

Next, referring to FIGS. 4A and 4B, the positional relationship between each of the imaging element holder 2 and the base member 8 and the metal member 5 will be described. FIG. 4A is a perspective view of the imaging element holder 2 to which the movable-side metal member 5M (movable-side terminal plate) is attached. FIG. 4B is a perspective view of the base member 8 to which the fixed-side metal member 5F (fixed-side terminal plate) is attached. For clarity, in FIG. 4A, the movable metal member 5M has a dot pattern, and in FIG. 4B, the fixed metal member 5F has a dot pattern.

In the example shown in FIG. 4A, the first movable terminal plate 5M1 is fixed to the X1 side wall (front mounting surface) and the Y1 side wall (left mounting surface) of the first movable pedestal portion 2D1. Specifically, in a state in which the groove 2G (see FIG. 2) formed on the upper surface of the first movable-side pedestal portion 2D1 and the bent piece BP formed on the first movable-side terminal plate 5M1 are engaged with each other, the first The movable terminal plate 5M1 is fixed to the first movable pedestal 2D1 with an adhesive. The adhesive is, for example, a photocurable adhesive. The photocurable adhesive is, for example, an ultraviolet curable adhesive or a visible light curable adhesive. Similarly, the second movable terminal plate 5M2 is fixed to the X2 side wall (rear mounting surface) and the Y2 side wall (right mounting surface) of the second movable pedestal portion 2D2. Specifically, in a state in which the groove 2G (see FIG. 2) formed on the upper surface of the second movable-side pedestal portion 2D2 and the bent piece BP formed on the second movable-side terminal plate 5M2 are engaged with each other, the second The movable terminal plate 5M2 is fixed to the second movable pedestal 2D2 with an adhesive.

In the example shown in FIG. 4B, the first stationary terminal plate 5F1 and the second stationary terminal plate 5F2 are located on the X1 side of the first stationary seat 8D1 arranged along the first side 8E1 of the base member 8. It is fixed to the side wall (front mounting surface). Specifically, the first stationary terminal plate 5F1 and the second stationary terminal plate 5F2 are fixed to the first stationary pedestal portion 8D1 with an adhesive. The adhesive is, for example, a photocurable adhesive. The photocurable adhesive is, for example, an ultraviolet curable adhesive or a visible light curable adhesive. Similarly, the third stationary terminal plate 5F3 and the fourth stationary terminal plate 5F4 (not visible in FIG. 4B) are attached to the second stationary pedestal 8D2 arranged along the second side 8E2 of the base member 8 It is fixed to the side wall (left mounting surface) on the Y1 side. Also, the fifth fixed side terminal plate 5F5 and the sixth fixed side terminal plate 5F6 (not visible in FIG. 4B) are arranged along the third side 8E3 of the base member 8 on the X2 side of the second fixed side pedestal portion 8D2. side wall (rear mounting surface). The seventh stationary terminal plate 5F7 and the eighth stationary terminal plate 5F8 are arranged along the fourth side 8E4 of the base member 8 on the Y2 side wall (right mounting surface) of the first stationary pedestal 8D1. ).

The shape memory alloy wire SA extends along the inner surface of the outer peripheral wall portion 4A of the cover member 4, and is configured to movably support the first movable member MB1 with respect to the fixed member FB. . In this embodiment, the shape memory alloy wires SA include first wires SA1 to eighth wires SA8, as shown in FIG. It is configured to be able to movably support the image pickup device holder 2 as a. Specifically, as shown in FIG. 2, each of the first wire SA1 to the eighth wire SA8 has one end fixed to the stationary metal member 5F by crimping or welding, and the other end is crimped or welded. is fixed to the movable-side metal member 5M.

Next, the metal member 5 to which the shape memory alloy wire SA is attached will be described with reference to FIGS. 5A and 5B. FIG. 5A shows a seventh wire SA7 attached to each of the second movable terminal plate 5M2 and the seventh fixed terminal plate 5F7, and a wire SA7 attached to each of the second movable terminal plate 5M2 and the eighth fixed terminal plate 5F8. It is a figure when the 8th wire SA8 attached is seen from the Y2 side (right side). FIG. 5B shows a seventh wire SA7 attached to each of the second movable side terminal plate 5M2 and the seventh fixed side terminal plate 5F7, and each of the second movable side terminal plate 5M2 and the eighth fixed side terminal plate 5F8. It is a figure when the 8th wire SA8 attached is seen from the X1 side (front side). The positional relationship of each member shown in FIGS. 5A and 5B corresponds to the positional relationship when the camera module MD is assembled. 5A) and 5B, illustration of other members is omitted for clarity. Also, the following description with reference to FIGS. 5A and 5B relates to the combination of the seventh wire SA7 and the eighth wire SA8, the combination of the first wire SA1 and the second wire SA2, the third wire SA3 and the fourth wire SA4. and the combination of the fifth wire SA5 and the sixth wire SA6.

Specifically, one end of the seventh wire SA7 is fixed to the seventh fixed terminal plate 5F7 at the holding portion J2 of the seventh fixed terminal plate 5F7, and the other end of the seventh wire SA7 is fixed to the second movable terminal plate 5F7. It is fixed to the second movable side terminal plate 5M2 at the lower holding portion J1 of the terminal plate 5M2. Similarly, one end of the eighth wire SA8 is fixed to the eighth fixed terminal plate 5F8 at the holding portion J4 of the eighth fixed terminal plate 5F8, and the other end of the eighth wire SA8 is fixed to the second movable terminal plate. It is fixed to the second movable side terminal plate 5M2 at the upper holding portion J3 of 5M2.

The holding portion J1 is formed by bending a portion of the second movable terminal plate 5M2. Specifically, a portion of the second movable terminal plate 5M2 forms a holding portion J1 by being bent while sandwiching the end (the other end) of the seventh wire SA7. An end (the other end) of the seventh wire SA7 is fixed to the holding portion J1 by welding. The same applies to the holding portions J2 to J4.

As shown in FIG. 5A, the seventh wire SA7 and the eighth wire SA8 are arranged so as to be twisted relative to each other (three-dimensionally intersect when viewed from the Y2 side). That is, the seventh wire SA7 and the eighth wire SA8 are arranged so as not to contact each other (become non-contact).

Next, with reference to FIG. 6, the details of the base member 8, which is a part of the fixed side member FB, will be described. 6 is a perspective view of the base member 8. FIG. Specifically, the upper view of FIG. 6 is a perspective view of the base member 8 with the conductive member CM removed, and the central view of FIG. 6 is a perspective view of the base member 8 in which the conductive member CM is embedded. In addition, in the central view of FIG. 6 and the lower view of FIG. 6, the conductive member CM is given a dot pattern for clarity.

The base member 8 is configured to function as a fixed-side wire support section that supports one end of each of the first wire SA1 to the eighth wire SA8. Further, the imaging device holder 2 is configured to function as a movable side wire support section that supports the other ends of the first to eighth wires SA1 to SA8. With this configuration, the first movable member MB1 is supported by the first wire SA1 to the eighth wire SA8 so as to be movable with respect to the fixed member FB with six degrees of freedom.

As described above, the fixed side pedestal portion 8D is formed on the upper surface of the base member 8 on the subject side (Z1 side surface). The fixed side pedestal portion 8D includes a first fixed side pedestal portion 8D1 and a second fixed side pedestal portion 8D2. The first fixed side seat portion 8D1 and the second fixed side seat portion 8D2 are arranged to face each other with the first rotation axis RX1 interposed therebetween.

In the base member 8, as shown in the central view of FIG. 6, a conductive member CM formed of a metal plate containing a material such as copper, iron, or an alloy containing them as a main component is embedded by insert molding. . In this embodiment, the conductive member CM includes a connecting portion ED exposed on the lower surface (Z2 side surface) of the base member 8 and extending outward, and an upper surface (Z1 side surface) of the fixed side pedestal portion 8D of the base member 8 (Z1 side surface). ).

Specifically, the conductive member CM includes a first conductive member CM1 and a second conductive member CM2. The first conductive member CM1 includes a first connection portion ED1 and a first joint surface portion CP1, and the second conductive member CM2 includes a second connection portion ED2 and a second joint surface portion CP2.

Next, the positional relationship among the metal member 5, the elastic metal member 6, the conductive member CM, and the shape memory alloy wire SA will be described with reference to FIGS. 7A and 7B. 7A and 7B are diagrams showing the positional relationship among the metal member 5, the elastic metal member 6, the conductive member CM, and the shape memory alloy wire SA. Specifically, FIG. 7A is a perspective view of each member (metal member 5, elastic metal member 6, conductive member CM, and shape memory alloy wire SA), and FIG. 7B is a top view of each member. In addition, in FIGS. 7A and 7B, dot patterns are given to the movable-side metal member 5M and the conductive member CM for clarity. Also, in FIG. 7B, illustration of the shape memory alloy wire SA is omitted for clarity.

As shown in FIG. 3, the elastic metal member 6 includes a first fixed portion 6e1 fixed to the first fixed-side pedestal portion 8D1 (see FIG. 2) of the base member 8, and a first movable portion 6e1 of the imaging element holder 2. A second fixing portion 6e2 fixed to the side pedestal portion 2D1 (see FIG. 2), a third fixing portion 6e3 fixed to the second fixed side pedestal portion 8D2 (see FIG. 2) of the base member 8, and an imaging A fourth fixing portion 6e4 fixed to the second movable side pedestal portion 2D2 (see FIG. 2) of the element holder 2, a first arm portion 6g1 connecting the first fixing portion 6e1 and the second fixing portion 6e2, A second arm portion 6g2 connecting the second fixing portion 6e2 and the third fixing portion 6e3, a third arm portion 6g3 connecting the third fixing portion 6e3 and the fourth fixing portion 6e4, a fourth fixing portion 6e4 and the first fixing portion 6e1. and a fourth arm portion 6g4 that connects the

The first fixing portion 6e1 has a first through hole 6H1 and a second through hole 6H2 through which the upwardly protruding columnar protrusion 8T (see FIG. 4B) formed on the first fixed side pedestal portion 8D1 is inserted. , and a third through hole 6H3 used for bonding with the first bonding surface portion CP1 (see the lower diagram of FIG. 6) of the first conductive member CM1. In this embodiment, the fixing between the elastic metal member 6 and the projecting portion 8T is achieved by subjecting the projecting portion 8T to hot crimping or cold crimping. However, the fixing between the elastic metal member 6 and the projecting portion 8T may be realized by an adhesive. In addition, in the present embodiment, the elastic metal member 6 and the first conductive member CM1 are joined together by welding such as laser welding. However, the joint between the elastic metal member 6 and the first conductive member CM1 may be realized by solder, a conductive adhesive, or the like.

The second fixing portion 6e2 has a fourth through hole 6H4 and a fifth through hole 6H5 through which the upwardly projecting columnar protrusion 2T (see FIG. 4A) formed on the first movable side pedestal portion 2D1 is inserted. and a sixth through-hole 6H6 used for joining with the tip of the bent piece BP (see FIG. 4A) of the first movable-side terminal plate 5M1. In this embodiment, the fixing of the elastic metal member 6 and the projecting portion 2T is achieved by subjecting the projecting portion 2T to hot crimping or cold crimping. However, the fixing between the elastic metal member 6 and the projecting portion 2T may be realized by an adhesive. In addition, in this embodiment, the elastic metal member 6 and the bent piece BP of the first movable terminal plate 5M1 are joined together by welding such as laser welding. However, the joint between the elastic metal member 6 and the bent piece BP may be realized by solder, a conductive adhesive, or the like.

Similarly, in the third fixing portion 6e3, a seventh through-hole 6H7 and an eighth through-hole 6H7 through which an upwardly protruding columnar projection 8T (see FIG. 4B) formed on the second fixed-side pedestal portion 8D2 is inserted. A through hole 6H8 and a ninth through hole 6H9 used for joining with the second joint surface portion CP2 (see the lower diagram of FIG. 6) of the second conductive member CM2 are formed.

Further, in the fourth fixing portion 6e4, a tenth through-hole 6H10 and an eleventh through-hole 6H10 through which a cylindrical protrusion 2T (see FIG. 4A) protruding upward formed on the second movable side pedestal portion 2D2 is inserted. A hole 6H11 and a twelfth through hole 6H12 used for joining with the tip of the bent piece BP (see FIG. 4A) of the second movable terminal plate 5M2 are formed.

Each of the first arm portion 6g1 to the fourth arm portion 6g4 of the elastic metal member 6 is an elastically deformable arm portion having four curved portions. Therefore, the imaging element holder 2 can move with respect to the base member 8 (fixed member FB) not only in the direction parallel to the first rotation axis RX1, but also in the direction intersecting the first rotation axis RX1. ing.

As shown in FIG. 7B, the elastic metal member 6 is configured to have two-fold rotational symmetry with respect to the first rotation axis RX1. Therefore, the elastic metal member 6 hardly affects the weight balance of the image pickup device holder 2 . Moreover, the elastic metal member 6 hardly affects the weight balance of the first movable side member MB1 supported by the eight shape memory alloy wires SA (the first wire SA1 to the eighth wire SA8).

The fixed-side metal member 5F has a connection portion CT (see FIGS. 5A and 5B) and is configured to be joined to the conductive pattern PT of the flexible substrate 3 via the connection portion CT. In the present embodiment, the connection portion CT of the stationary-side metal member 5F includes a first connection portion CT1 to an eighth connection portion CT8.

The flexible board 3 includes, as shown in FIG. 2, a substantially rectangular inner portion 3i attached to the lower surface of the circuit board 7 and a substantially rectangular annular outer portion 3e attached to the lower surface of the base member 8. . A first conductive pattern PT1 to a twentieth conductive pattern PT20 are formed in the outer portion 3e, and a large number of conductive patterns (not shown) used for connection with the imaging element IS are formed in the inner portion 3i. there is

Specifically, the first connecting portion CT1 of the first fixed-side terminal plate 5F1 is joined to the first conductive pattern PT1 (see FIG. 2) of the flexible substrate 3 by soldering. Similarly, the second connection portion CT2 of the second fixed terminal plate 5F2 is soldered to the second conductive pattern PT2 (see FIG. 2) of the flexible substrate 3, and the third fixed terminal plate 5F3 is The third connection portion CT3 is joined to the third conductive pattern PT3 (see FIG. 2) of the flexible substrate 3 by soldering, and the fourth connection portion CT4 of the fourth fixed terminal plate 5F4 is soldered. It is joined to the fourth conductive pattern PT4 (see FIG. 2) of the flexible substrate 3, and the fifth connecting portion CT5 of the fifth fixed-side terminal plate 5F5 is soldered to the fifth conductive pattern PT5 (see FIG. 2) of the flexible substrate 3. 2), and the sixth connecting portion CT6 of the sixth fixed terminal plate 5F6 is joined to the sixth conductive pattern PT6 (see FIG. 2) of the flexible substrate 3 by soldering, and the seventh The seventh connecting portion CT7 of the fixed terminal plate 5F7 is soldered to the seventh conductive pattern PT7 (see FIG. 2) of the flexible substrate 3, and the eighth connecting portion CT8 of the eighth fixed terminal plate 5F8 is connected. is joined to the eighth conductive pattern PT8 (see FIG. 2) of the flexible substrate 3 by soldering. Note that the connecting portion CT and the conductive pattern PT of the flexible substrate 3 may be joined by a conductive adhesive.

The first connection portion ED1 of the first conductive member CM1 is soldered to the ninth conductive pattern PT9 (see FIG. 2) of the flexible substrate 3, and the second connection portion ED2 of the second conductive member CM2 is It is joined to the tenth conductive pattern PT10 (see FIG. 2) of the flexible substrate 3 by soldering. In this embodiment, both the ninth conductive pattern PT9 and the tenth conductive pattern PT10 are connected to a ground terminal (not shown). Note that the connection portion ED and the conductive pattern PT of the flexible substrate 3 may be joined by a conductive adhesive.

The bent piece BP of the first movable terminal plate 5M1 is joined to the second fixed portion 6e2 of the elastic metal member 6 by welding such as laser welding, as shown in FIG. 7B. Similarly, the bent piece BP of the second movable side terminal plate 5M2 is joined to the fourth fixed portion 6e4 of the elastic metal member 6 by welding such as laser welding.

The first stationary terminal plate 5F1, the second stationary terminal plate 5F2, the seventh stationary terminal plate 5F7, and the eighth stationary terminal plate 5F8 are the first stationary portion of the elastic metal member 6, as shown in FIG. 7B. 6e1, and is not in contact with the first fixing portion 6e1 of the elastic metal member 6. As shown in FIG. On the other hand, as shown in FIG. 7B, the first fixed portion 6e1 of the elastic metal member 6 is joined to the first joint surface portion CP1 of the first conductive member CM1 by welding such as laser welding. Similarly, the third stationary terminal plate 5F3 to the sixth stationary terminal plate 5F6 are arranged apart from the third stationary portion 6e3 of the elastic metal member 6, as shown in FIG. 7B. is not in contact with the third fixing portion 6e3. On the other hand, as shown in FIG. 7B, the third fixing portion 6e3 of the elastic metal member 6 is joined to the second joint surface portion CP2 of the second conductive member CM2 by welding such as laser welding.

Next, with reference to FIGS. 8A and 8B, the path of current flowing through the shape memory alloy wire SA will be described. 8A and 8B are perspective views of a portion of the arrangement shown in FIG. 7A. In FIGS. 8A and 8B, for clarity, the first conductive member CM1 and the second movable terminal plate 5M2 are given rough dot patterns, and the seventh stationary terminal plate 5F7 and the eighth stationary terminal plate 5F8 has a fine dot pattern, and the elastic metal member 6 has an even finer dot pattern.

Specifically, FIG. 8A shows the state when the seventh connection portion CT7 of the seventh stationary terminal plate 5F7 is connected to a high potential and the first connection portion ED1 of the first conductive member CM1 is connected to a low potential. FIG. 8B shows that the eighth connection portion CT8 of the eighth fixed terminal plate 5F8 is connected to a high potential, and the first connection portion ED1 of the first conductive member CM1 is connected to a low potential. shows the path of the current when The following description relates to the path of the current flowing through the seventh wire SA7 or the eighth wire SA8, but the path of the current flowing through the first wire SA1 or the second wire SA2, the current flowing through the third wire SA3 or the fourth wire SA4. The same applies to the path and the path of the current flowing through the fifth wire SA5 or the sixth wire SA6.

When the seventh connecting portion CT7 of the seventh stationary terminal plate 5F7 is connected to a high potential and the first connecting portion ED1 of the first conductive member CM1 is connected to a low potential, the current flows as indicated by the arrow AR1 in FIG. 8A. flows through the seventh connecting portion CT7 to the seventh stationary terminal plate 5F7. After that, the current flows through the seventh fixed terminal plate 5F7 as indicated by arrow AR2, through the seventh wire SA7 as indicated by arrow AR3, and further through the second movable terminal plate 5M2 as indicated by arrow AR4. pass. Thereafter, the current flows through the fourth fixing portion 6e4, the fourth arm portion 6g4 and the first fixing portion 6e1 of the elastic metal member 6 as indicated by arrows AR5, AR6 and AR7, and then through the first fixing portion 6e1 as indicated by arrow AR8. flows through the first conductive member CM1 to the first connecting portion ED1.

In this embodiment, the current flows through the fourth fixing portion 6e4 of the elastic metal member 6, the third arm portion 6g3, the third fixing portion 6e3, the second conductive member CM2, and also the second connecting portion ED2. is configured to This is because both the first connection portion ED1 of the first conductive member CM1 and the second connection portion ED2 of the second conductive member CM2 are grounded.

When the eighth connecting portion CT8 of the eighth fixed-side terminal plate 5F8 is connected to a high potential and the first connecting portion ED1 of the first conductive member CM1 is connected to a low potential, the current flows as indicated by the arrow AR11 in FIG. 8B. , flows through the eighth connecting portion CT8 to the eighth stationary terminal plate 5F8. After that, the current flows through the eighth fixed terminal plate 5F8 as indicated by arrow AR12, the eighth wire SA8 as indicated by arrow AR13, and the second movable terminal plate 5M2 as indicated by arrow AR14. pass. After that, the current flows through the fourth fixing portion 6e4, the fourth arm portion 6g4 and the first fixing portion 6e1 of the elastic metal member 6 as indicated by arrows AR15, AR16 and AR17, and then through the first fixing portion 6e1 as indicated by arrow AR18. flows through the first conductive member CM1 to the first connecting portion ED1.

Also, when the seventh connecting portion CT7 of the seventh fixed terminal plate 5F7 is connected to a high potential, or when the eighth connecting portion CT8 of the eighth fixed side terminal plate 5F8 is connected to a high potential, , the path of the current after passing through the second movable-side terminal plate 5M2 is the same.

The control device outside the camera module MD as described above controls the voltages applied to the respective connection portions CT of the first fixed terminal plate 5F1 to the eighth fixed terminal plate 5F8 so that the first wire The expansion and contraction of each of SA1 to eighth wire SA8 can be controlled. Alternatively, the control device controls the first terminal plate 5F1 through the eighth fixed terminal plate 5F8 via the connecting portions CT of the first to eighth stationary terminal plates 5F8 and the connecting portions ED of the first conductive member CM1 and the second conductive member CM2. By controlling the current supplied to each of the first wire SA1 to the eighth wire SA8, the expansion and contraction of each of the first wire SA1 to the eighth wire SA8 can be controlled. Note that the control device may be arranged in the camera module MD. Also, the control device may be a component of the camera module MD.

For example, the control device utilizes the driving force along the first direction (Z-axis direction) parallel to the first rotation axis RX1 due to the contraction of the shape memory alloy wire SA as the imaging element driving unit DM1, and the lens body LS On the Z2 side, the imaging element holder 2 may be moved along the first direction. By moving the image sensor holder 2 in this manner, the control device may realize an automatic focus adjustment function, which is one of the lens adjustment functions. Specifically, the control device moves the image sensor holder 2 in a direction away from the lens body LS to enable macro photography, and moves the image sensor holder 2 in a direction closer to the lens body LS to infinity photography. may be enabled.

The control device may also move the imaging element holder 2 in a direction intersecting with the first direction by controlling the currents flowing through the plurality of shape memory alloy wires SA. The direction intersecting the first direction is, for example, the second direction (X-axis direction) perpendicular to the first direction, or the third direction (Y-axis direction) perpendicular to the first direction and the second direction. good. In addition, the control device rotates the imaging element holder 2 around the first direction (Z-axis direction), around the second direction (X-axis direction), or around the third direction (Y-axis direction). good too. By such movement of the image pickup device holder 2, the control device may implement a camera shake correction function.

Next, with reference to FIGS. 9 to 16, the details of the imaging element driving section DM1 will be described. FIG. 9 is a table showing expansion and contraction states of the shape memory alloy wire SA when realizing each of the six degrees of freedom of movement of the imaging element holder 2 . 10A and 10B are a top view, a front view, a rear view, a left side view, and a right side view of the imaging element holder 2 and the base member 8 which are connected by the shape memory alloy wire SA. FIG. 11 is a top view of the imaging element holder 2 and the base member 8 that translate in the X-axis direction with respect to the base member 8. FIG. FIG. 12 is a top view of the imaging element holder 2 and the base member 8 that translate in the Y-axis direction with respect to the base member 8. FIG. FIG. 13 is a front view of the imaging element holder 2 and the base member 8 that translate in the Z-axis direction with respect to the base member 8. FIG. FIG. 14 is a front view of the imaging element holder 2 and the base member 8 rotating around the X-axis (second rotation axis RX2). FIG. 15 is a right side view of the imaging element holder 2 and the base member 8 rotating around the Y-axis (third rotation axis RX3). FIG. 16 is a top view of the imaging element holder 2 and the base member 8 rotating around the Z-axis (first rotation axis RX1). 10 to 16, for clarity, the imaging element holder 2 has a fine dot pattern and the base member 8 has a coarse dot pattern. 10 to 16, the illustration of the four connecting portions CN (see FIG. 3) formed at the four corners of the base member 8 is omitted for clarity, and the outer shape of the base member 8 is Simplified.

FIG. 10 shows the state of the imaging element holder 2, the base member 8, and the shape memory alloy wire SA when the camera module MD is in the neutral state (neutral position). Note that the neutral state of the camera module MD is the imaging element holding body 2 and the lens holding body 20 (FIG. 17) that can translate along the respective directions of the X-axis, the Y-axis, and the Z-axis with respect to the fixed-side member FB. ) are positioned in the middle of the movable range in the X-axis direction, in the middle of the movable range in the Y-axis direction, and in the middle of the movable range in the Z-axis direction. means. Typically, in the neutral state of the camera module MD, each of the imaging element holder 2 and the lens holder 20 is positioned at the center of each movable range in the X-axis direction, the Y-axis direction, and the Z-axis direction. is in a state of In addition, the neutral state of the camera module MD rotates around the X axis (second rotation axis RX2), around the Y axis (third rotation axis RX3), and around the Z axis (first rotation axis RX1). It means a state in which the rotatable (rockable) imaging device holder 2 is positioned in the middle of the rotatable range (rotatable angle) around each rotation axis. In addition, the neutral state of the camera module MD rotates around the X axis (fifth rotation axis RX5), around the Y axis (sixth rotation axis RX6), and around the Z axis (fourth rotation axis RX4). It means a state in which the rotatable (rockable) lens holder 20 is positioned in the middle of the rotatable range (rotatable angle) around each rotation axis. Typically, in the neutral state of the camera module MD, the imaging surface of the image sensor IS is perpendicular to the optical axis of the lens body LS arranged to face the image sensor IS. In this case, the first rotation axis RX1, which is the central axis of the imaging device IS (imaging surface), coincides with the optical axis of the lens body LS. The initial state of the camera module MD when no current is supplied to the shape memory alloy wire SA and the upper shape memory alloy wire SB (see FIG. 17) may be the neutral state.

Specifically, when the camera module MD is in the neutral state, one end (fixed end) of the second wire SA2 is outside the other end (movable end) by a predetermined distance D1 in a top view from the Z1 side. (Front side (X1 side)). One end (fixed end) of the second wire SA2 is the end fixed to the second fixed terminal plate 5F2, and the other end (movable end) of the second wire SA2 is the first movable terminal plate 5M1. is the end that is fixed to the

In addition, the fourth wire SA4 is arranged such that one end (fixed end) thereof is positioned outside (to the left (Y1 side)) the other end (movable end) of the fourth wire SA4 by a predetermined distance D2 when viewed from the top. One end (fixed end) of SA6 is positioned outside (rear side (X2 side)) a predetermined distance D3 from the other end (movable end). ) is positioned outside (to the right (Y2 side)) of the other end (movable end) by a predetermined distance D4. The same applies to the first wire SA1, the third wire SA3, the fifth wire SA5, and the seventh wire SA7.

That is, when viewed from above, the first wire SA1, the second wire SA2, the fifth wire SA5, and the sixth wire SA6 are arranged so as to be non-parallel to the Y-axis, and the third wire SA3 and the fourth wire SA3 are arranged to be non-parallel to the Y axis. SA4, seventh wire SA7, and eighth wire SA8 are arranged so as to be non-parallel to the X-axis.

With such an arrangement, the control device can move the image sensor holder 2 along the X-axis or the Y-axis, for example, by contracting a part of the first wire SA1 to the eighth wire SA8 and extending the rest. can be translated by

Further, when the camera module MD is in a neutral state, the first wire SA1 is arranged so that one end (fixed end) thereof is higher than the other end (movable end) in a front view viewed from the X1 side. , the second wire SA2 is arranged so that one end (fixed end) is lower than the other end (movable end), and the first wire SA1 and the second wire SA2 are arranged so as to cross each other. ing.

Further, in a left side view from the Y1 side, the third wire SA3 is arranged so that one end (fixed end) thereof is higher than the other end (movable end), and the fourth wire SA4 The (fixed end) is positioned lower than the other end (movable end), and the third wire SA3 and the fourth wire SA4 are arranged to cross each other.

In addition, in rear view from the X2 side, the fifth wire SA5 is arranged so that one end (fixed end) is higher than the other end (movable end), and the sixth wire SA6 is arranged such that one end ( The fixed end) is positioned lower than the other end (movable end), and the fifth wire SA5 and the sixth wire SA6 are arranged to cross each other.

Similarly, in a right side view from the Y2 side, the seventh wire SA7 is arranged so that one end (fixed end) is higher than the other end (movable end), and the eighth wire SA8 One end (fixed end) is positioned lower than the other end (movable end), and the seventh wire SA7 and the eighth wire SA8 are arranged to cross each other.

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.

With such an arrangement, the control device causes, for example, the first wire SA1 to the eighth wire SA8 to contract partly and extend the rest, thereby translating the imaging element holder 2 along the Z axis. be able to. However, the first wire SA1 and the second wire SA2 need only be arranged so as to extend obliquely when viewed from the front, and need not cross each other when viewed from the front. 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.

Specifically, the upper diagram of FIG. 11 is a top view of the imaging element holder 2 and the base member 8 that translate in the X1 direction (forward) with respect to the base member 8, and the middle diagram of FIG. 11 is a neutral state. 11 is a top view of the image pickup element holder 2 and the base member 8 in FIG. 11, and the lower diagram of FIG. .

When the image sensor holder 2 is translated in the X1 direction (forward) with respect to the base member 8, the control device contracts the first wire SA1 and the second wire SA2 relatively small as shown in the table of FIG. , the third wire SA3 and the fourth wire SA4 are stretched relatively greatly, the fifth wire SA5 and the sixth wire SA6 are stretched relatively little, and the seventh wire SA7 and the eighth wire SA8 are relatively greatly contracted. . Shrinking the first wire SA1 and the second wire SA2 to a relatively small amount and shrinking the seventh wire SA7 and the eighth wire SA8 to a relatively large amount means that the amount of shrinkage of each of the first wire SA1 and the second wire SA2 is is smaller than the contraction amount of each of the seventh wire SA7 and the eighth wire SA8. In addition, stretching the third wire SA3 and the fourth wire SA4 relatively large and stretching the fifth wire SA5 and the sixth wire SA6 relatively small will cause the third wire SA3 and the fourth wire SA4 to stretch. It means that the amount of extension is greater than the amount of extension of each of the fifth wire SA5 and the sixth wire SA6. In addition, in the present embodiment, the control device causes the first wire SA1 and the second wire SA2 to shrink by substantially the same amount and relatively small, and the third wire SA3 and the fourth wire SA4 to stretch by approximately the same amount and relatively large. The fifth wire SA5 and the sixth wire SA6 are stretched to a relatively small extent by approximately the same amount of stretching, and the seventh wire SA7 and the eighth wire SA8 are shrunk by approximately the same amount to a relatively large extent. The same applies to the following description. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the imaging device driver DM1 can translate the imaging device holder 2 in the X1 direction (forward) with respect to the base member 8, as indicated by an arrow AR21 in the upper diagram of FIG. .

Similarly, when the control device translates the image pickup element holder 2 in the X2 direction (rearward) with respect to the base member 8, the first wire SA1 and the second wire SA2 are relatively set as shown in the table of FIG. The third wire SA3 and the fourth wire SA4 are contracted relatively large, the fifth wire SA5 and the sixth wire SA6 are contracted relatively small, and the seventh wire SA7 and the eighth wire SA8 are contracted relatively. stretch greatly. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the imaging device driver DM1 can translate the imaging device holder 2 in the X2 direction (backward) with respect to the base member 8, as indicated by an arrow AR22 in the lower diagram of FIG.

The upper diagram in FIG. 12 is a top view of the imaging element holder 2 and the base member 8 that translate in the Y1 direction (leftward) with respect to the base member 8, and the middle diagram in FIG. 12 is a top view of the body 2 and the base member 8, and the bottom view of FIG.

When the control device translates the imaging element holder 2 in the Y1 direction (leftward) with respect to the base member 8, the first wire SA1 and the second wire SA2 are stretched relatively large as shown in the table of FIG. , the third wire SA3 and the fourth wire SA4 are shrunk relatively small, the fifth wire SA5 and the sixth wire SA6 are shrunk relatively large, and the seventh wire SA7 and the eighth wire SA8 are stretched relatively small. Let The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the imaging device driver DM1 can translate the imaging device holder 2 in the Y1 direction (to the left) with respect to the base member 8, as indicated by an arrow AR23 in the upper diagram of FIG. can.

Similarly, when the control device translates the imaging element holder 2 in the Y2 direction (rightward) with respect to the base member 8, the first wire SA1 and the second wire SA2 are compared as shown in the table of FIG. The third wire SA3 and the fourth wire SA4 are stretched relatively little, the fifth wire SA5 and the sixth wire SA6 are stretched relatively greatly, and the seventh wire SA7 and the eighth wire SA8 are compared. contract small. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the imaging device driver DM1 can translate the imaging device holder 2 in the Y2 direction (to the right) with respect to the base member 8, as indicated by an arrow AR24 in the lower diagram of FIG. .

The upper diagram in FIG. 13 is a front view of the imaging element holder 2 and the base member 8 that translate in the Z1 direction (upward) with respect to the base member 8, and the middle diagram in FIG. 13 is the imaging element holder in a neutral state. 13 is a front view of the image sensor holder 2 and the base member 8, and the lower view of FIG.

When the control device translates the imaging element holder 2 in the Z1 direction (upward) with respect to the base member 8, as shown in the table of FIG. and the seventh wire SA7 are contracted, and the second wire SA2, the fourth wire SA4, the sixth wire SA6 and the eighth wire SA8 are stretched. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the imaging device driver DM1 can translate the imaging device holder 2 in the Z1 direction (upward) with respect to the base member 8, as indicated by an arrow AR25 in the upper diagram of FIG. .

Similarly, when the control device translates the imaging element holder 2 in the Z2 direction (downward) with respect to the base member 8, the first wire SA1, the third wire SA3, the fifth The wire SA5 and the seventh wire SA7 are stretched by approximately the same amount of stretching, and the second wire SA2, the fourth wire SA4, the sixth wire SA6 and the eighth wire SA8 are contracted by approximately the same amount of contraction. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the image pickup device driver DM1 can translate the image pickup device holder 2 in the Z2 direction (downward) with respect to the base member 8, as indicated by an arrow AR26 in the lower diagram of FIG.

14 is a front view of the imaging element holder 2 and the base member 8 rotating clockwise about the X-axis (second rotation axis RX2) with respect to the base member 8, and the center view of FIG. 14 is a front view of the imaging element holder 2 and the base member 8 in a neutral state, and the lower view of FIG. 2 is a front view of an imaging device holder 2 and a base member 8; FIG.

When the control device rotates the imaging element holder 2 clockwise around the X axis (second rotation axis RX2) with respect to the base member 8 in a front view, the first wire The wires SA1 to the third wire SA3 and the eighth wire SA8 are contracted by approximately the same amount of contraction, and the fourth wire SA4 to the seventh wire SA7 are stretched by approximately the same extension amount. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the image pickup device driver DM1 rotates the image pickup device clockwise around the X axis (second rotation axis RX2) with respect to the base member 8, as indicated by an arrow AR27 in the upper diagram of FIG. The holder 2 can be rotated.

Similarly, when the control device rotates the imaging element holder 2 counterclockwise around the X axis (second rotation axis RX2) with respect to the base member 8 in a front view, as shown in the table of FIG. , the first wire SA1 to the third wire SA3 and the eighth wire SA8 are stretched by approximately the same stretching amount, and the fourth wire SA4 to the seventh wire SA7 are contracted by approximately the same shrinking amount. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the image pickup device driver DM1 rotates the image pickup device counterclockwise around the X axis (second rotation axis RX2) with respect to the base member 8, as indicated by an arrow AR28 in the lower diagram of FIG. The holder 2 can be rotated.

The upper diagram in FIG. 15 is a right side view of the imaging element holder 2 rotating clockwise around the Y-axis (third rotation axis RX3) with respect to the base member 8 and the base member 8. The figure is a right side view of the imaging element holder 2 and the base member 8 in a neutral state, and the lower figure in FIG. 3 is a right side view of the rotating imaging element holder 2 and the base member 8. FIG.

When the control device rotates the imaging element holder 2 clockwise around the Y-axis (third rotation axis RX3) with respect to the base member 8 in the right side view, the first The wire SA1, the third wire SA3, the fourth wire SA4, and the sixth wire SA6 are contracted by substantially the same amount, and the second wire SA2, the fifth wire SA5, the seventh wire SA7, and the eighth wire SA8 are contracted. It is extended by approximately the same amount of extension. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the image pickup device driver DM1 rotates the image pickup device clockwise around the Y axis (third rotation axis RX3) with respect to the base member 8, as indicated by an arrow AR29 in the upper diagram of FIG. The holder 2 can be rotated.

Similarly, when the control device rotates the imaging element holder 2 counterclockwise around the Y-axis (third rotation axis RX3) with respect to the base member 8 in the right side view, as shown in the table of FIG. , the first wire SA1, the third wire SA3, the fourth wire SA4, and the sixth wire SA6 are stretched by substantially the same amount of stretching, and the second wire SA2, the fifth wire SA5, the seventh wire SA7, and the The 8-wire SA8 is shrunk by approximately the same amount of shrinkage. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the image pickup device driver DM1 rotates the image pickup device counterclockwise around the Y axis (third rotation axis RX3) with respect to the base member 8, as indicated by an arrow AR30 in the lower diagram of FIG. The holder 2 can be rotated.

16 is a top view of the base member 8 and the imaging element holder 2 rotating clockwise about the Z-axis (first rotation axis RX1) with respect to the base member 8, and the center view of FIG. 16 is a top view of the imaging element holder 2 and the base member 8 in a neutral state, and the lower view of FIG. 2 is a top view of an imaging device holder 2 and a base member 8; FIG.

When the control device rotates the imaging element holder 2 clockwise around the Z-axis (first rotation axis RX1) with respect to the base member 8 in top view, the first wire The SA1, the second wire SA2, the fifth wire SA5, and the sixth wire SA6 are stretched by substantially the same amount of stretching, and the third wire SA3, the fourth wire SA4, the seventh wire SA7, and the eighth wire SA8 are stretched substantially. Shrink with the same amount of shrinkage. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the image pickup device driver DM1 rotates the image pickup device clockwise around the Z axis (first rotation axis RX1) with respect to the base member 8, as indicated by an arrow AR31 in the upper diagram of FIG. The holder 2 can be rotated.

Similarly, when the control device rotates the imaging element holder 2 counterclockwise around the Z-axis (first rotation axis RX1) with respect to the base member 8 in top view, as shown in the table of FIG. , the first wire SA1, the second wire SA2, the fifth wire SA5, and the sixth wire SA6 are contracted by substantially the same contraction amount, and the third wire SA3, the fourth wire SA4, the seventh wire SA7, and the eighth wire SA7 are contracted by approximately the same contraction amount. The wire SA8 is stretched by approximately the same stretch amount. The control device expands and contracts each of the first wire SA1 through eighth wire SA8 as described above by individually adjusting the magnitude of the current supplied to each of first wire SA1 through eighth wire SA8. Under the control of this control device, the image pickup device driver DM1 rotates the image pickup device counterclockwise around the Z axis (first rotation axis RX1) with respect to the base member 8, as indicated by an arrow AR32 in the lower diagram of FIG. The holder 2 can be rotated.

As described above, the imaging device holder 2 can move with 6 degrees of freedom. Each of these six degrees of freedom of movement is realized by individually adjusting the current supplied to each of the first wire SA1 to the eighth wire SA8. The movement of the imaging device holder 2 may be realized by combining a plurality of movements of the six degrees of freedom. In the present embodiment, the imaging element holder 2 moves when the corresponding shape memory alloy wire SA contracts by applying current to one or more of the first wire SA1 to the eighth wire SA8. By the movement, another one or more of the first wire SA1 to the eighth wire SA8 are stretched, thereby realizing the stretching of the shape memory alloy wire SA.

The six-degree-of-freedom motion of the first movable member MB1 as described above is detected by a motion detector (not shown). The motion detection unit includes, for example, at least three magnets attached to the first movable side member MB1 such as the image pickup element holder 2, and at least three magnets attached to the fixed side member FB such as the base member 8 or the flexible substrate 3. and a magnetic sensor.

The magnetic sensor is configured to detect the position of the first movable member MB1 by detecting the position of the magnet. In this embodiment, the magnetic sensor is configured to detect the position of the first movable member MB1 using a Hall element. However, the magnetic sensor is a Giant Magneto Resistive effect (GMR) element that can detect the magnetic field generated by a magnet, a Semiconductor Magneto Resistive (SMR) element, an Anisotropic Magneto Resistive The position of the first movable side member MB1 may be detected using a magnetoresistive element such as a Tunnel Magneto Resistive (TMR) element or a Tunnel Magneto Resistive (TMR) element.

Next, the lens driving device LD will be described with reference to FIG. FIG. 17 is an exploded perspective view of the lens driving device LD.

The lens driving device LD includes a lens driving section DM2, a lens holder 20, an upper metal member 50, an upper elastic metal member 60, and an upper base member 80, as shown in FIG.

The lens driver DM2 includes an upper shape memory alloy wire SB, which is an example of a shape memory actuator. In this embodiment, the upper shape memory alloy wires SB include first to eighth wires SB1 to SB8 having substantially the same length and substantially the same diameter. Each of the first wire SB1 to eighth wire SB8 may have substantially the same length and substantially the same diameter as each of the first wire SA1 to eighth wire SA8. As with the shape memory alloy wire SA, the upper shape memory alloy wire SB increases in temperature when current flows, and contracts according to the increase in temperature. The lens driver DM2 can move the lens holder 20 by utilizing contraction of the upper shape memory alloy wire SB. When one or more of the first wire SB1 to the eighth wire SB8 contract, the upper shape memory alloy wire SB moves the lens holder 20, and the other one or more of the upper shape memory alloy wires SB are stretched. (decompressed).

In this embodiment, the lens driving section DM2 is configured so as to be able to move the second movable side member MB2 with six degrees of freedom. The six-degree-of-freedom movement consists of translation in a first direction (Z-axis direction) parallel to the optical axis of the lens body LS (see FIG. 18) and translation in a second direction (X-axis direction) perpendicular to the first direction. , translation in a third direction (Y-axis direction) perpendicular to the first and second directions, rotation about the first direction (Z-axis direction), rotation about a second direction (X-axis direction), and Includes rotation about a third direction (the Y-axis direction). The direction parallel to the optical axis is the direction parallel to the fourth rotation axis RX4, the second direction (X-axis direction) is the direction parallel to the fifth rotation axis RX5, and the third direction (Y-axis direction) is a direction parallel to the sixth rotation axis RX6. Also, the lens body LS is, for example, a cylindrical lens barrel having at least one lens. It should be noted that the fourth rotation axis RX4 coincides with the optical axis of the lens body LS.

Specifically, the motion of the second movable-side member MB2 with six degrees of freedom is realized by the image pickup element driving section DM1 (shape memory alloy wire SA) described with reference to FIGS. In a manner similar to the six degrees of freedom movement of the body 2, it is realized by the lens driver DM2 (upper shape memory alloy wire SB).

More specifically, each movement of the second movable side member MB2 with six degrees of freedom is realized by individually adjusting the current supplied to each of the first wire SB1 to the eighth wire SB8. The movement of the second movable-side member MB2 may be realized by combining a plurality of movements of the six degrees of freedom. In the present embodiment, the second movable member MB2 moves when the corresponding upper shape memory alloy wire SB contracts by applying current to one or more of the first wire SB1 to the eighth wire SB8. . By this movement, another one or more of the first wire SB1 to the eighth wire SB8 are stretched, thereby realizing the stretching of the upper shape memory alloy wire SB.

Further, the movement of the second movable side member MB2 with six degrees of freedom as described above is detected by a motion detection section (not shown) as in the case of the first movable side member MB1. The motion detector is composed of, for example, at least three magnets attached to the second movable side member MB2 such as the lens holder 20, and at least three magnetic sensors attached to the fixed side member FB such as the upper base member 80. be.

The magnetic sensor is configured to detect the position of the second movable member MB2 by detecting the position of the magnet. In this embodiment, the magnetic sensor is configured to detect the position of the second movable member MB2 using a Hall element. However, the magnetic sensor may be configured to detect the position of the second movable member MB2 using a magnetoresistive element.

The second movable side member MB2 is a member driven by the lens driving section DM2 and includes a lens holder 20 capable of holding the lens body LS.

The lens holder 20 is formed by injection molding synthetic resin such as liquid crystal polymer (LCP). Specifically, as shown in FIG. 17, the lens holder 20 is formed at two of the four corners of the frame body 20F, which has a substantially rectangular frame shape when viewed from above, and the four corners of the frame body 20F. and a movable-side pedestal portion 20D, and projecting portions 20S formed at the remaining two of the four corners of the frame 20F. In this embodiment, the frame 20F has a cylindrical through hole, and the lens body LS is configured to be bonded to the cylindrical inner surface of the frame 20F with an adhesive.

The movable-side pedestal portion 20D includes a first movable-side pedestal portion 20D1 and a second movable-side pedestal portion 20D2. The first movable-side pedestal portion 20D1 and the second movable-side pedestal portion 20D2 are arranged so as to face each other across the fourth rotation axis RX4, which is also the optical axis of the lens body LS. Similarly, the projecting portion 20S includes a first projecting portion 20S1 and a second projecting portion 20S2. The first projecting portion 20S1 and the second projecting portion 20S2 are arranged to face each other with the fourth rotation axis RX4 interposed therebetween. Specifically, the movable-side pedestal portion 20D and the projecting portion 20S are arranged so as to correspond to the four corners of the lens holding body 20 (frame body 20F) having a substantially rectangular outer shape when viewed from above, and , are arranged alternately. A part of the upper elastic metal member 60 is placed on each of the two movable-side pedestals 20D, as shown in FIG.

FIG. 18 is a perspective view of the upper elastic metal member 60 connected to the lens holder 20 and the upper base member 80. FIG. It shows the positional relationship. In FIG. 18, for clarity, the lens holder 20 has a fine dot pattern, and the upper base member 80 has a coarse dot pattern. 18, members other than the lens body LS, the lens holder 20, the upper elastic metal member 60, and the upper base member 80 are omitted for clarity.

The upper elastic metal member 60 is configured so that the lens holder 20 can be movably connected to the fixed side member FB (upper base member 80). In this embodiment, the upper elastic metal member 60 is made of a conductive metal plate mainly made of a copper alloy, a titanium-copper alloy (titanium-copper), or a copper-nickel alloy (nickel-tin-copper), for example. ing. The upper elastic metal member 60 may be a leaf spring.

The upper base member 80 is formed by injection molding using synthetic resin such as liquid crystal polymer (LCP). In the present embodiment, the upper base member 80 has a substantially rectangular frame-like contour when viewed from above, and has an opening 80K in the center. Specifically, the upper base member 80 has four side portions 80E (first side portion 80E1 to fourth side portion 80E4) arranged to surround the opening 80K.

More specifically, the upper base member 80 includes fixed side pedestals 80D formed at two of the four corners of the upper base member 80, as shown in FIG. The fixed-side pedestal portion 80D protrudes upward (in the Z1 direction) from the plate-like base portion of the upper base member 80 . The fixed side seat portion 80D includes a first fixed side seat portion 80D1 and a second fixed side seat portion 80D2. The first fixed side seat portion 80D1 and the second fixed side seat portion 80D2 are arranged so as to face each other with the fourth rotation axis RX4 interposed therebetween. Further, as shown in FIG. 18, the first fixed side pedestal portion 80D1 is arranged to face the first projecting portion 20S1 of the lens holder 20, and the second fixed side pedestal portion 80D2 is arranged to face the lens holder 20. is arranged so as to face the second projecting portion 20S2.

The upper elastic metal member 60 is configured to connect the movable side pedestal portion 20D formed on the lens holder 20 and the fixed side pedestal portion 80D formed on the upper base member 80 . Specifically, as shown in FIG. 18, the upper elastic metal member 60 is formed on the first fixed portion 60e1 attached to the first movable side pedestal portion 20D1 formed on the lens holder 20, and on the upper base member 80. a second fixed portion 60e2 attached to the first fixed side pedestal portion 80D1, a third fixed portion 60e3 attached to the second movable side pedestal portion 20D2 formed in the lens holder 20; and a fourth fixing portion 60e4 attached to the second fixed side pedestal portion 80D2. 18, the upper elastic metal member 60 includes an elastically deformable first arm portion 60g1 connecting the first fixing portion 60e1 and the second fixing portion 60e2, a second fixing portion 60e2 and a third fixing portion 60e2. 60e3, an elastically deformable second arm portion 60g2 that connects the third fixing portion 60e3 and the fourth fixing portion 60e4, and an elastically deformable third arm portion 60g3 that connects the fourth fixing portion 60e4 and the first fixing portion. 60e1 and an elastically deformable fourth arm 60g4.

As shown in FIG. 17, the upper metal member 50 is configured such that the ends of the upper shape memory alloy wires SB are fixed. In this embodiment, the upper metal member 50 includes a fixed metal member 50F and a movable metal member 50M. The fixed-side metal member 50F is configured to be fixed to the fixed-side pedestal portion 80D of the upper base member 80. As shown in FIG. The movable-side metal member 50M is configured to be fixed to the movable-side pedestal portion 20D of the lens holder 20. As shown in FIG.

The fixed-side metal member 50F is also called a fixed-side terminal plate, and includes a first fixed-side terminal plate 50F1 to an eighth fixed-side terminal plate 50F8. The movable-side metal member 50M is also called a movable-side terminal plate, and includes a first movable-side terminal plate 50M1 and a second movable-side terminal plate 50M2.

Next, the positional relationship between the lens holder 20 and the upper base member 80 and the upper metal member 50 will be described with reference to FIGS. 19A and 19B. FIG. 19A is a perspective view of the lens holder 20 to which the movable-side metal member 50M (movable-side terminal plate) is attached. FIG. 19B is a perspective view of the upper base member 80 to which the fixed-side metal member 50F (fixed-side terminal plate) is attached. For clarity, in FIG. 19A, a dot pattern is given to the movable metal member 50M, and in FIG. 19B, a dot pattern is given to the fixed side metal member 50F.

In the example shown in FIG. 19A, the first movable terminal plate 50M1 is fixed to the X1 side wall (front mounting surface) and the Y2 side wall (right mounting surface) of the first movable pedestal portion 20D1. Specifically, in a state in which the groove 20G (see FIG. 17) formed on the upper surface of the first movable-side pedestal 20D1 and the bent piece BP formed on the first movable-side terminal plate 50M1 are engaged with each other, the first The movable terminal plate 50M1 is fixed to the first movable pedestal 20D1 with an adhesive. The adhesive is, for example, a photocurable adhesive. The photocurable adhesive is, for example, an ultraviolet curable adhesive or a visible light curable adhesive. Similarly, the second movable terminal plate 50M2 is fixed to the X2 side wall (rear mounting surface) and the Y1 side wall (left mounting surface) of the second movable pedestal portion 20D2. Specifically, in a state in which the groove 20G (see FIG. 17) formed on the upper surface of the second movable side pedestal portion 20D2 and the bent piece BP formed on the second movable side terminal plate 50M2 are engaged with each other, the second The movable terminal plate 50M2 is fixed to the second movable pedestal 20D2 with an adhesive.

In the example shown in FIG. 19B, the first stationary terminal plate 50F1 and the second stationary terminal plate 50F2 are arranged along the first side 80E1 of the upper base member 80 on the X1 side of the first stationary pedestal 80D1. is fixed to the side wall (front mounting surface) of the Specifically, the first fixed-side terminal plate 50F1 and the second fixed-side terminal plate 50F2 are fixed to the side wall (front mounting surface) of the first fixed-side pedestal portion 80D1 with an adhesive. The adhesive is, for example, a photocurable adhesive. The photocurable adhesive is, for example, an ultraviolet curable adhesive or a visible light curable adhesive. Similarly, the third fixed-side terminal plate 50F3 and the fourth fixed-side terminal plate 50F4 (not visible in FIG. 19B) are arranged along the second side 80E2 of the upper base member 80 on the first fixed-side pedestal portion 80D1. is fixed to the side wall (left mounting surface) on the Y1 side of the . Also, the fifth fixed side terminal plate 50F5 and the sixth fixed side terminal plate 50F6 (not visible in FIG. 19B) are attached to the second fixed side pedestal portion 80D2 arranged along the third side portion 80E3 of the upper base member 80. It is fixed to the side wall (rear mounting surface) on the X2 side. The seventh stationary terminal plate 50F7 and the eighth stationary terminal plate 50F8 are arranged along the fourth side 80E4 of the upper base member 80 on the Y2 side wall of the second stationary pedestal 80D2 (right side mounting). surface).

The upper shape memory alloy wire SB extends along the inner surface of the outer peripheral wall portion 4A of the cover member 4, and is configured to movably support the second movable side member MB2 with respect to the fixed side member FB. there is In this embodiment, the upper shape memory alloy wires SB include the first wire SB1 to the eighth wire SB8, and the upper base member 80 as the fixed side member FB and the lens holding body as the second movable side member MB2. 20 can be movably supported. As shown in FIG. 17, each of the first wire SB1 to the eighth wire SB8 has one end fixed to the stationary side metal member 50F by crimping or welding, and the other end being crimped or welded to the movable side metal member. It is attached to 50M.

Next, the upper metal member 50 to which the upper shape memory alloy wire SB is attached will be described with reference to FIGS. 20A and 20B. FIG. 20A shows the seventh wire SB7 attached to each of the first movable terminal plate 50M1 and seventh fixed terminal plate 50F7, and the first movable terminal plate 50M1 and eighth fixed terminal plate 50F8. It is a figure when seeing attached 8th wire SB8 from the Y2 side. FIG. 20B shows a seventh wire SB7 attached to each of the first movable-side terminal plate 50M1 and the seventh fixed-side terminal plate 50F7, and each of the first movable-side terminal plate 50M1 and the eighth fixed-side terminal plate 50F8. It is a figure when the 8th wire SB8 attached is seen from the X1 side. Note that the positional relationship of each member shown in FIGS. 20A and 20B corresponds to the positional relationship when the camera module MD is assembled. 20A and 20B, illustration of other members is omitted for clarity. Also, the following description with reference to FIGS. 20A and 20B relates to the combination of the seventh wire SB7 and the eighth wire SB8, the combination of the first wire SB1 and the second wire SB2, the third wire SB3 and the fourth wire SB4. and the combination of the fifth wire SB5 and the sixth wire SB6.

Specifically, one end of the seventh wire SB7 is fixed to the seventh fixed terminal plate 50F7 at the holding portion J2 of the seventh fixed terminal plate 50F7, and the other end of the seventh wire SB7 is connected to the first movable terminal plate 50F7. It is fixed to the first movable side terminal plate 50M1 at the lower holding portion J1 of the terminal plate 50M1. Similarly, one end of the eighth wire SB8 is fixed to the eighth fixed terminal plate 50F8 at the holding portion J4 of the eighth fixed terminal plate 50F8, and the other end of the eighth wire SB8 is fixed to the first movable terminal plate. It is fixed to the first movable side terminal plate 50M1 at a holding portion J3 on the upper side of 50M1.

The holding portion J1 is formed by bending a portion of the first movable terminal plate 50M1. Specifically, a portion of the first movable terminal plate 50M1 forms a holding portion J1 by being bent while sandwiching the end (the other end) of the seventh wire SB7. An end (the other end) of the seventh wire SB7 is fixed to the holding portion J1 by welding. The same applies to the holding portions J2 to J4.

As shown in FIG. 20A, the seventh wire SB7 and the eighth wire SB8 are arranged so as to be mutually twisted (three-dimensionally intersect when viewed from the Y2 side). That is, the seventh wire SB7 and the eighth wire SB8 are arranged so as not to contact each other (become non-contact).

Next, with reference to FIG. 21, details of the upper base member 80 that is part of the fixed side member FB will be described. 21 is a perspective view of the upper base member 80. FIG. 21 is a perspective view of the upper base member 80 with the conductive member CM removed, and the central view of FIG. 21 is a conductive member embedded in the upper base member 80. 21 is a perspective view of the CM, and the lower view of FIG. 21 is a perspective view of the upper base member 80 in which the conductive member CM is embedded. In addition, in the central view of FIG. 21 and the lower view of FIG. 21, the conductive member CM is given a dot pattern for clarity.

The upper base member 80 is configured to function as a fixed-side wire support section that supports one end of each of the first wire SB1 to the eighth wire SB8. Further, the lens holder 20 is configured to function as a movable wire support section that supports the other ends of the first to eighth wires SB1 to SB8. With this configuration, the second movable member MB2 is supported by the first wire SB1 to the eighth wire SB8 so as to be movable with six degrees of freedom.

A fixed-side pedestal portion 80D is formed on the upper surface of the upper base member 80, which is the object-side surface (Z1-side surface). The fixed side pedestal portion 80D includes a first fixed side pedestal portion 80D1 and a second fixed side pedestal portion 80D2. The first fixed side seat portion 80D1 and the second fixed side seat portion 80D2 are arranged to face each other with the fourth rotation axis RX4 interposed therebetween.

In the upper base member 80, as shown in the central view of FIG. 21, a conductive member CM formed of a metal plate containing a material such as copper, iron, or an alloy containing them as a main component is embedded by insert molding. there is In the present embodiment, the conductive member CM includes a connecting portion ED exposed on the lower surface (Z2 side surface) of the upper base member 80 and extending downward, and an upper surface (Z1 side surface) of the fixed side pedestal portion 80D of the upper base member 80 (Z1 side surface). and a bonding surface portion CP exposed to the surface).

Specifically, the conductive member CM includes an eleventh conductive member CM11 and a twelfth conductive member CM12. The eleventh conductive member CM11 includes an eleventh connection portion ED11 and an eleventh joint surface portion CP11. The twelfth conductive member CM12 includes a twelfth connection portion ED12 and a twelfth joint surface portion CP12.

Next, the positional relationship among the upper metal member 50, the upper elastic metal member 60, the conductive member CM, and the upper shape memory alloy wire SB will be described with reference to FIGS. 22A and 22B. 22A and 22B are diagrams showing the positional relationship between the upper metal member 50, the upper elastic metal member 60, the conductive member CM, and the upper shape memory alloy wire SB. Specifically, FIG. 22A is a perspective view of each member (upper metal member 50, upper elastic metal member 60, conductive member CM, and upper shape memory alloy wire SB), and FIG. 22B is a top view of each member. is. In addition, in FIGS. 22A and 22B, dot patterns are given to the movable-side metal member 50M and the conductive member CM for clarity. Also, in FIG. 22B, illustration of the upper shape memory alloy wire SB is omitted for clarity.

The upper elastic metal member 60 is, as shown in FIG. A second fixing portion 60e2 that is fixed, a third fixing portion 60e3 that is fixed to the second movable side seat portion 20D2 of the lens holder 20, and a third fixing portion 60e3 that is fixed to the second fixed side seat portion 80D2 of the upper base member 80. 4 fixing portion 60e4, a first arm portion 60g1 connecting the first fixing portion 60e1 and the second fixing portion 60e2, a second arm portion 60g2 connecting the second fixing portion 60e2 and the third fixing portion 60e3, and a third fixing portion It has a third arm portion 60g3 connecting the fourth fixing portion 60e4 to the fourth fixing portion 60e3, and a fourth arm portion 60g4 connecting the fourth fixing portion 60e4 and the first fixing portion 60e1.

In the first fixing portion 60e1, a first through hole 60H1 and a second through hole 60H2 through which the upwardly protruding columnar protrusion 20T (see FIG. 19A) formed on the first movable side pedestal portion 20D1 is inserted. and a third through hole 60H3 used for joining with the tip of the bent piece BP (see FIG. 19A) of the first movable terminal plate 50M1. In this embodiment, the fixation of the upper elastic metal member 60 and the projecting portion 20T is realized by subjecting the projecting portion 20T to hot crimping or cold crimping. However, the fixing between the upper elastic metal member 60 and the protruding portion 20T may be realized by an adhesive. In this embodiment, the upper elastic metal member 60 and the bent piece BP of the first movable terminal plate 50M1 are joined together by welding such as laser welding. However, the bonding between the upper elastic metal member 60 and the bent piece BP may be realized by solder, a conductive adhesive, or the like.

The second fixing portion 60e2 has a fourth through hole 60H4 and a fifth through hole 60H5 through which the upwardly protruding cylindrical projection 80T (see FIG. 19B) formed on the first fixed side pedestal portion 80D1 is inserted. and a sixth through hole 60H6 used for bonding with the eleventh joint surface portion CP11 (see the lower diagram of FIG. 21) of the eleventh conductive member CM11. In this embodiment, the fixation of the upper elastic metal member 60 and the projecting portion 80T is realized by subjecting the projecting portion 80T to hot crimping or cold crimping. However, the fixing between the upper elastic metal member 60 and the protruding portion 80T may be realized by an adhesive. In addition, in the present embodiment, the upper elastic metal member 60 and the eleventh conductive member CM11 are joined together by welding such as laser welding. However, the bonding between the upper elastic metal member 60 and the eleventh conductive member CM11 may be realized by solder, a conductive adhesive, or the like.

Similarly, in the third fixing portion 60e3, the seventh through hole 60H7 and the eighth through hole 60H7 through which the upwardly protruding columnar protrusion 20T (see FIG. 19A) formed on the second movable side pedestal portion 20D2 is inserted. A through-hole 60H8 and a ninth through-hole 60H9 used for joining with the tip of the bent piece BP (see FIG. 19A) of the second movable-side terminal plate 50M2 are formed.

Further, in the fourth fixing portion 60e4, a tenth through-hole 60H10 and an eleventh through-hole 60H10 through which an upwardly protruding columnar protrusion 80T (see FIG. 19B) formed on the second fixed-side pedestal portion 80D2 is inserted. A hole 60H11 and a twelfth through hole 60H12 used for bonding with the twelfth bonding surface portion CP12 (see the lower diagram of FIG. 21) of the twelfth conductive member CM12 are formed.

Each of the first arm portion 60g1 to the fourth arm portion 60g4 of the upper elastic metal member 60 is an elastically deformable arm portion having four curved portions. Therefore, the lens holding body 20 is attached to the upper base member 80 (fixed member FB) not only in the direction parallel to the fourth rotation axis RX4, which is the optical axis direction of the lens body LS, but also in the direction parallel to the fourth rotation axis RX4. It is also possible to move in the crossing direction.

As shown in FIG. 22B, the upper elastic metal member 60 is configured to have two-fold rotational symmetry with respect to the fourth rotation axis RX4. Therefore, the upper elastic metal member 60 hardly affects the weight balance of the lens holder 20 . In addition, the upper elastic metal member 60 hardly adversely affects the weight balance of the second movable side member MB2 supported by the eight upper shape memory alloy wires SB (the first wire SB1 to the eighth wire SB8). .

The fixed-side metal member 50F has a connection portion CT (see FIGS. 20A and 20B) and is configured to be joined to the conductive pattern PT of the flexible substrate 3 via the connection portion CT. In the present embodiment, the connecting portion CT of the stationary-side metal member 50F includes an eleventh connecting portion CT11 to an eighteenth connecting portion CT18.

The flexible board 3 includes, as shown in FIG. 2, a substantially rectangular inner portion 3i attached to the lower surface of the circuit board 7 and a substantially rectangular annular outer portion 3e attached to the lower surface of the base member 8. . A first conductive pattern PT1 to a twentieth conductive pattern PT20 are formed in the outer portion 3e, and a large number of conductive patterns (not shown) used for connection with the imaging element IS are formed in the inner portion 3i. there is A substantially U-shaped slit (opening) is formed between the inner portion 3i and the outer portion 3e so that the movement of the inner portion 3i is not hindered.

Specifically, the eleventh connecting portion CT11 of the first fixed-side terminal plate 50F1 is joined to the eleventh conductive pattern PT11 (see FIG. 2) of the flexible substrate 3 by soldering. Similarly, the twelfth connecting portion CT12 of the second fixed terminal plate 50F2 is soldered to the twelfth conductive pattern PT12 (see FIG. 2) of the flexible substrate 3, and the third fixed terminal plate 50F3 The thirteenth connection CT13 is soldered to the thirteenth conductive pattern PT13 (see FIG. 2) of the flexible substrate 3, and the fourteenth connection CT14 of the fourth stationary terminal plate 50F4 is soldered. It is joined to the 14th conductive pattern PT14 (see FIG. 2) of the flexible substrate 3, and the 15th connecting portion CT15 of the fifth fixed terminal plate 50F5 is connected to the 15th conductive pattern PT15 (see FIG. 2) of the flexible substrate 3 by soldering. 2), and the sixteenth connecting portion CT16 of the sixth fixed terminal plate 50F6 is joined to the sixteenth conductive pattern PT16 (see FIG. 2) of the flexible substrate 3 by soldering, and the seventh The seventeenth connecting portion CT17 of the fixed terminal plate 50F7 is soldered to the seventeenth conductive pattern PT17 (see FIG. 2) of the flexible substrate 3, and the eighteenth connecting portion CT18 of the eighth fixed terminal plate 50F8 is connected. are joined to the eighteenth conductive pattern PT18 (see FIG. 2) of the flexible substrate 3 by soldering.

The eleventh connection portion ED11 of the eleventh conductive member CM11 is soldered to the nineteenth conductive pattern PT19 (see FIG. 2) of the flexible substrate 3, and the twelfth connection portion ED12 of the twelfth conductive member CM12 is It is joined to the twentieth conductive pattern PT20 (see FIG. 2) of the flexible substrate 3 by soldering. In this embodiment, both the nineteenth conductive pattern PT19 and the twentieth conductive pattern PT20 are connected to a ground terminal (not shown).

The bent piece BP of the first movable side terminal plate 50M1 is joined to the first fixed portion 60e1 of the upper elastic metal member 60 by welding such as laser welding, as shown in FIG. 22B. Similarly, the bent piece BP of the second movable side terminal plate 50M2 is joined to the third fixing portion 60e3 of the upper elastic metal member 60 by welding such as laser welding.

On the other hand, as shown in FIG. 22B, the first fixed side terminal plate 50F1 to the fourth fixed side terminal plate 50F4 are arranged apart from the second fixed portion 60e2 of the upper elastic metal member 60, and the upper elastic metal The second fixing portion 60e2 of the member 60 is not contacted. As shown in FIG. 22B, the second fixing portion 60e2 of the upper elastic metal member 60 is joined to the eleventh joint surface portion CP11 of the eleventh conductive member CM11 by welding such as laser welding. Similarly, as shown in FIG. 22B, the fifth fixed side terminal plate 50F5 to the eighth fixed side terminal plate 50F8 are arranged apart from the fourth fixed portion 6e4 of the upper elastic metal member 60, The fourth fixing portion 6e4 of the member 60 is not contacted. As shown in FIG. 22B, the fourth fixing portion 6e4 of the upper elastic metal member 60 is joined to the twelfth joint surface portion CP12 of the twelfth conductive member CM12 by welding such as laser welding.

Next, with reference to FIGS. 23A and 23B, the path of current flowing through the upper shape memory alloy wire SB will be described. 23A and 23B are perspective views of a portion of the arrangement shown in FIG. 22A. In FIGS. 23A and 23B, for clarity, the twelfth conductive member CM12 and the first movable terminal plate 50M1 are given rough dot patterns, and the seventh stationary terminal plate 50F7 and the eighth stationary terminal plate 50F8 has a fine dot pattern, and the upper elastic metal member 60 has an even finer dot pattern.

Specifically, in FIG. 23A, when the seventeenth connecting portion CT17 of the seventh stationary terminal plate 50F7 is connected to a high potential and the twelfth connecting portion ED12 of the twelfth conductive member CM12 is connected to a low potential. 23B, the eighteenth connection CT18 of the eighth stationary terminal plate 50F8 is connected to a high potential, and the twelfth connection ED12 of the twelfth conductive member CM12 is connected to a low potential. shows the path of the current when The following description relates to the path of current flowing through the seventh wire SB7 or the eighth wire SB8. The same applies to the path and the path of the current flowing through the fifth wire SB5 or the sixth wire SB6.

When the seventeenth connecting portion CT17 of the seventh fixed terminal plate 50F7 is connected to a high potential and the twelfth connecting portion ED12 of the twelfth conductive member CM12 is connected to a low potential, the current flows from arrow AR21 in FIG. 23A. , flows through the seventeenth connecting portion CT17 to the seventh stationary terminal plate 50F7. After that, the current flows through the seventh fixed terminal plate 50F7 as indicated by an arrow AR22, through the seventh wire SB7 as indicated by an arrow AR23, and further through the first movable terminal plate 50M1 as indicated by an arrow AR24. pass. After that, the current flows through the first fixing portion 60e1, the fourth arm portion 60g4, and the fourth fixing portion 60e4 of the upper elastic metal member 60 as indicated by arrows AR25, AR26, and AR27, and then flows through arrow AR28. As shown, it flows through the twelfth conductive member CM12 to the twelfth connection part ED12.

When the eighteenth connection CT18 of the eighth fixed-side terminal plate 50F8 is connected to a high potential and the twelfth connection ED12 of the twelfth conductive member CM12 is connected to a low potential, the current flows from arrow AR31 in FIG. 23B. , flows through the eighteenth connecting portion CT18 to the eighth stationary terminal plate 50F8. After that, the current flows through the eighth fixed terminal plate 50F8 as indicated by arrow AR32, through the eighth wire SB8 as indicated by arrow AR33, and further through the first movable terminal plate 50M1 as indicated by arrow AR34. pass. After that, the current flows through the first fixing portion 60e1, the fourth arm portion 60g4, and the fourth fixing portion 60e4 of the upper elastic metal member 60 as indicated by arrows AR35, AR36, and AR37, and then flows through arrow AR38. As shown, it flows through the twelfth conductive member CM12 to the twelfth connection part ED12.

In this embodiment, the current also flows through the first fixing portion 60e1, the first arm portion 60g1, the second fixing portion 60e2, the eleventh conductive member CM11 of the upper elastic metal member 60, and the eleventh connection portion ED11. is configured as This is because the eleventh connection portion ED11 of the eleventh conductive member CM11 and the twelfth connection portion ED12 of the twelfth conductive member CM12 are both grounded.

Further, when the seventeenth connection CT17 of the seventh fixed terminal plate 50F7 is connected to a high potential, or when the eighteenth connection CT18 of the eighth fixed terminal plate 50F8 is connected to a high potential, , the path of the current after passing through the first movable-side terminal plate 50M1 is the same.

The control device outside the camera module MD as described above controls the voltage applied to the connection portions CT of the first fixed terminal plate 50F1 to the eighth fixed terminal plate 50F8, thereby controlling the voltage applied to the first wire. The expansion and contraction of each of SB1 to eighth wire SB8 can be controlled. Alternatively, the control device connects the first terminal plate 50F1 to the eighth fixed terminal plate 50F8 through the connecting portions CT and the connecting portions ED of the eleventh conductive member CM11 and the twelfth conductive member CM12. By controlling the current supplied to each of the 1st wire SB1 to the 8th wire SB8, the expansion and contraction of each of the 1st wire SB1 to the 8th wire SB8 can be controlled. Note that the control device may be arranged in the camera module MD as described above. The controller may also be a component of the camera module MD, as described above.

For example, the control device utilizes the driving force along the first direction (Z-axis direction) parallel to the fourth rotation axis RX4 due to the contraction of the upper shape memory alloy wire SB as the lens driving unit DM2, On the Z1 side, the lens holder 20 may be moved along the first direction, which is the optical axis direction of the lens body LS. By moving the lens holder 20 in this manner, the control device may realize an automatic focus adjustment function, which is one of the lens adjustment functions. Specifically, the control device moves the lens holder 20 away from the image pickup device IS to enable macro photography, and moves the lens holder 20 toward the image pickup device IS to enable infinity photography. can be

Further, the control device may move the lens holder 20 in a direction intersecting with the first direction by controlling currents flowing through the plurality of upper shape memory alloy wires SB. The direction intersecting the first direction is, for example, the second direction (X-axis direction) perpendicular to the first direction, or the third direction (Y-axis direction) perpendicular to the first direction and the second direction. good. In addition, the control device rotates the imaging element holder 2 around the first direction (Z-axis direction), around the second direction (X-axis direction), or around the third direction (Y-axis direction). good too. By such movement of the lens holder 20, the control device may realize a camera shake correction function. Note that the first direction (Z-axis direction) is a direction parallel to the fourth rotation axis RX4, the second direction (X-axis direction) is a direction parallel to the fifth rotation axis RX5, and the third direction ( Y-axis direction) is a direction parallel to the sixth rotation axis RX6.

Next, with reference to FIGS. 24A, 24B, 25A, and 25B, the positional relationship between the movable side member, the fixed side member FB, and the driving section will be described. The movable side member includes a first movable side member MB1 (imaging element holder 2) and a second movable side member MB2 (lens holder 20). The fixed side member FB includes a base member 8 and an upper base member 80 . The driving section includes an imaging element driving section DM1 (shape memory alloy wire SA) and a lens driving section DM2 (upper shape memory alloy wire SB).

24A and 24B are top perspective views of the imaging element holder 2, the elastic metal member 6, the base member 8, the lens holder 20, the upper elastic metal member 60, and the upper base member 80. FIG. Specifically, FIG. 24A is a perspective view when viewed obliquely from above right, and FIG. 24B is a perspective view when viewed obliquely from above left. In FIGS. 24A and 24B, for clarity, the imaging device holder 2 and the lens holder 20 are provided with fine dot patterns, and the base member 8 and the upper base member 80 are provided with coarse dot patterns. there is

25A and 25B are diagrams of the shape memory alloy wire SA, the metal member 5, the upper shape memory alloy wire SB, the upper metal member 50, and the conductive member CM. Specifically, FIG. 25A is a top perspective view and FIG. 25B is a top view.

As shown in FIGS. 24A, 24B, 25A, and 25B, the camera module MD uses the shape memory alloy wire SA as the image pickup device drive section DM1 to move the image pickup device holder 2 to the base member 8. It is configured to be movable, and is configured to be able to move the lens holder 20 with respect to the upper base member 80 using the upper shape memory alloy wire SB as the lens driving section DM2.

In this embodiment, as shown in FIGS. 24A and 24B, the upper base member 80 is arranged above the base member 8 and joined to the base member 8 with an adhesive. Specifically, the upper base member 80 is connected to the base member 8 via four connecting portions CN (first connecting portion CN1 to fourth connecting portion CN4; see also FIG. 3) formed at the four corners of the base member 8. is immovably connected to the

In addition, the upper base member 80 has a fixed wire support portion (first fixed pedestal portion 80D1 and second fixed pedestal portion 80D2) that is aligned with the fixed wire support portion (first fixed pedestal portion 80D2) of the base member 8 in the Z-axis direction. It is configured so as not to overlap with the side pedestal portion 8D1 and the second fixed side pedestal portion 8D2). Specifically, the upper base member 80 has the first fixed side pedestal portion 80D1 arranged above the second connecting portion CN2 of the base member 8, and the second fixed side pedestal portion 80D2 arranged on the fourth side of the base member 8. It is configured to be arranged above the connecting portion CN4. That is, the base member 8 has the first fixed side pedestal portion 8D1 disposed below the first movable side pedestal portion 20D1 of the lens holder 20, and the second fixed side pedestal portion 8D2 of the lens holder 20. 2 is configured to be disposed below the movable side pedestal portion 20D2. In addition, the upper base member 80 has the first fixed side seat portion 80D1 arranged above the first movable side seat portion 2D1 of the image pickup device holding body 2, and the second fixed side seat portion 80D2 located above the image pickup device holding body 2. is arranged above the second movable side pedestal portion 2D2. This arrangement has the effect of increasing the space efficiency within the housing HS.

Next, with reference to FIGS. 26A to 26E, examples of movements of the lens body LS and the image pickup element IS realized by the driving section will be described. 26A to 26E are schematic diagrams showing movements of the lens body LS and the imaging element IS. Figures drawn by solid lines in FIGS. 26A to 26E represent the respective positions (orientations) of the lens body LS and the image sensor IS after being moved by the drive unit. Figures drawn with dotted lines in FIGS. 26A to 26E show the respective positions (attitudes) of the lens body LS and the image sensor IS before they are moved by the drive unit, that is, when the camera module MD is in the neutral state. represent. In the example shown in FIGS. 26A to 26E, when the camera module MD is in the neutral state, the imaging element IS is positioned at the center of each movable range in the X-axis direction, the Y-axis direction, and the Z-axis direction, and , the rotatable ranges (rotatable angles) around the X-axis (second rotation axis RX2), the Y-axis (third rotation axis RX3), and the Z-axis (first rotation axis RX1) Centrally located. Similarly, when the camera module MD is in the neutral state, the lens body LS is positioned at the center of each movable range in the X-axis direction, the Y-axis direction, and the Z-axis direction, and the X-axis (fifth rotation axis RX5 ), around the Y-axis (sixth rotation axis RX6), and around the Z-axis (fourth rotation axis RX4). Further, when the camera module MD is in the neutral state, the imaging surface of the image sensor IS is perpendicular to the optical axis of the lens body LS arranged to face the image sensor IS. In this case, the first rotation axis RX1, which is the central axis of the imaging device IS (imaging surface), coincides with the optical axis (fourth rotation axis RX4) of the lens body LS. That is, when the camera module MD is in the neutral state, the first rotation axis RX1 and the fourth rotation axis RX4 are positioned on the same straight line, the second rotation axis RX2 and the fifth rotation axis RX5 are parallel to each other, The third rotation axis RX3 and the sixth rotation axis RX6 are parallel to each other.

Specifically, FIG. 26A shows translation of the image sensor IS in a direction (Z-axis direction) parallel to the first rotation axis RX1 and translation of the lens body LS in a direction (Z-axis direction) parallel to the fourth rotation axis RX4. , and are performed simultaneously. By such translation of the lens body LS and the image sensor IS, the control device can realize, for example, an automatic focus adjustment function or a zoom function. In addition, by moving the lens body LS and the image sensor IS in opposite directions in the Z-axis direction, the control device can move the lens body relative to the image sensor IS more than when only one of the lens body LS and the image sensor IS is moved. It is possible to increase the relative movement speed of the LS in the Z-axis direction. Further, by moving the lens body LS and the image sensor IS in directions opposite to each other, the control device can move the Z axis of the lens body LS with respect to the image sensor IS more than when only one of the lens body LS and the image sensor IS is moved. The maximum relative movement distance in a direction can be increased. In the example shown in FIG. 26A, the control device translates the lens body LS in the Z1 direction and translates the imaging device IS in the Z2 direction. However, the control device may translate the lens body LS in the Z2 direction and translate the image sensor IS in the Z1 direction.

In FIG. 26B, translation of the imaging element IS in the direction (X-axis direction) parallel to the second rotation axis RX2 and translation of the lens body LS in the direction (X-axis direction) parallel to the fifth rotation axis RX5 are performed simultaneously. 2 shows the state of the lens body LS and the image sensor IS when the lens body LS is closed. By such translation of the lens body LS and the image sensor IS, the control device can, for example, realize a function of correcting disturbance of a captured image due to camera shake that causes translation of the camera module MD in the X-axis direction. In addition, by moving the lens body LS and the image sensor IS in opposite directions in the X-axis direction, the control device can move the lens body relative to the image sensor IS more than when only one of the lens body LS and the image sensor IS is moved. The relative movement speed of LS in the X-axis direction can be increased. In addition, by moving the lens body LS and the image sensor IS in opposite directions, the control device can move the lens body LS to the image sensor IS in an X-axis direction as compared to the case where only one of the lens body LS and the image sensor IS is moved. The maximum relative movement distance in a direction can be increased. In the example shown in FIG. 26B, the control device translates the lens body LS in the X2 direction and translates the imaging device IS in the X1 direction. However, the control device may translate the lens body LS in the X1 direction and translate the image sensor IS in the X2 direction. The control device may translate the lens body LS in the Y1 direction and the image sensor IS in the Y2 direction, or may translate the lens body LS in the Y2 direction and move the image sensor IS in the Y1 direction. You may translate in a direction.

FIG. 26C shows the state of the lens body LS and the image sensor IS when the rotation of the image sensor IS about the third rotation axis RX3 and the rotation of the lens body LS about the sixth rotation axis RX6 are simultaneously performed. . By such rotation of the lens body LS and the image sensor IS, the control device can realize a function of correcting disturbance of the captured image due to, for example, camera shake that causes rotation of the camera module MD about the Y axis. Further, the control device moves the first rotation axis RX1 and the fourth rotation axis RX1 and the fourth rotation axis RX4 by moving the lens body LS and the imaging device IS so that the parallel state between the first rotation axis RX1 and the fourth rotation axis RX4 is maintained. It is possible to suppress adverse effects on the captured image caused by tilting RX4 with respect to each other. Note that in the example shown in FIG. 26C, the control device rotates the lens body LS clockwise around the sixth rotation axis RX6 in the right side view, and also rotates the lens body LS clockwise around the third rotation axis RX3. The element IS is rotated. However, in the right side view, the control device rotates the lens body LS counterclockwise around the sixth rotation axis RX6, and rotates the image sensor IS counterclockwise around the third rotation axis RX3. may In addition, the control device may rotate the lens body LS clockwise around the fifth rotation axis RX5 and rotate the image sensor IS clockwise around the second rotation axis RX2 when viewed from the front. Alternatively, in a front view, the lens body LS may be rotated counterclockwise around the fifth rotation axis RX5, and the imaging element IS may be rotated counterclockwise around the second rotation axis RX2.

FIG. 26D shows the translation of the image sensor IS in the direction (X-axis direction) parallel to the second rotation axis RX2, the rotation of the image sensor IS around the third rotation axis RX3, and the direction (X-axis direction) parallel to the fifth rotation axis RX5. 6 shows the state of the lens body LS and the imaging element IS when translation of the lens body LS in the axial direction) and rotation of the lens body LS around the sixth rotation axis RX6 are performed simultaneously. Such translation and rotation of the lens body LS and translation and rotation of the imaging element IS allow the control device to improve the function of correcting disturbance of the captured image due to, for example, camera shake that causes rotation of the camera module MD about the Y-axis. can be effectively implemented. Further, the control device moves the first rotation axis RX1 and the fourth rotation axis RX1 by moving the lens body LS and the image sensor IS so that the state where the first rotation axis RX1 and the fourth rotation axis RX4 are aligned is maintained. It is possible to suppress adverse effects on the captured image caused by the separation or inclination of RX4. In the example shown in FIG. 26D, the control device translates the lens body LS in the X2 direction, translates the image sensor IS in the X1 direction, and rotates the lens body clockwise around the sixth rotation axis RX6 in the right side view. LS is rotated, and the imaging element IS is rotated clockwise around the third rotation axis RX3 in the right side view. However, the control device translates the lens body LS in the X1 direction, translates the image sensor IS in the X2 direction, rotates the lens body LS counterclockwise around the sixth rotation axis RX6 in the right side view, and , the imaging element IS may be rotated counterclockwise around the third rotation axis RX3 in a right side view. In addition, the control device translates the lens body LS in the Y2 direction, translates the image sensor IS in the Y1 direction, rotates the lens body LS clockwise around the fifth rotation axis RX5 when viewed from the front, and The imaging element IS may be rotated clockwise around the second rotation axis RX2 in view. Alternatively, the control device translates the lens body LS in the Y1 direction, translates the image sensor IS in the Y2 direction, rotates the lens body LS counterclockwise around the fifth rotation axis RX5 in front view, and The imaging element IS may be rotated counterclockwise around the second rotation axis RX2 in a front view.

FIG. 26E shows the state of the lens body LS and the image sensor IS when only the image sensor IS is rotated around the first rotation axis RX1 without translation and rotation of the lens body LS. This relative rotation of the imaging element IS with respect to the lens body LS allows the control device to implement the function of correcting disturbances in the captured image due to, for example, camera shake that causes rotation of the camera module MD about the Z axis. Note that in the example shown in FIG. 26E, the control device rotates the image sensor IS clockwise around the first rotation axis RX1 when viewed from above. However, the control device may rotate the image sensor IS counterclockwise around the first rotation axis RX1 when viewed from above.

Thus, when the imaging device IS rotates around the first rotation axis RX1, the lens body LS does not need to rotate around the fourth rotation axis RX4. Therefore, rotation about the fourth rotation axis RX4 (Z-axis) coinciding with the optical axis of the lens body LS is not executed in the movement of the second movable side member MB2 (lens holder 20) in the six degrees of freedom. good too. In other words, the second movable member MB2 should be able to move with five degrees of freedom.

As described above, the camera module MD according to the embodiment of the present invention includes, as shown in FIG. and an image pickup device drive section DM1 for moving the image pickup device holder 2 with respect to. The imaging device driver DM1 includes a plurality of shape memory alloy wires SA provided between a first movable member MB1 including the imaging device holder 2 and a fixed member FB. The plurality of shape memory alloy wires SA extend in a first direction (X A first wire SA1 and a fifth wire SA5 arranged apart in the axial direction) and separated in a second direction (Y-axis direction) perpendicular to the first direction (X-axis direction) with the imaging element IS interposed therebetween. and a third wire SA3 and a seventh wire SA7 arranged in parallel. Further, the plurality of shape memory alloy wires SA include second wires SA2 arranged to intersect the first wires SA1 in a side view (front view) along the first direction (X-axis direction); A fourth wire SA4 arranged to cross the third wire SA3 in a side view (left side view) along the second direction (Y-axis direction); A sixth wire SA6 arranged to intersect with the fifth wire SA5 in a side view (rear view) along the and an eighth wire SA8 arranged to intersect with the seventh wire SA7 at. Each of the first wire SA1 to the eighth wire SA8 has one end fixed to the fixed side member FB (base member 8) and the other end fixed to the first movable side member MB1 (image pickup element holder 2). there is

In this configuration, the movement of the imaging element holder 2 is performed by the shape memory alloy wire SA. Therefore, this configuration can suppress an increase in the size of the camera module MD, and can achieve a size smaller than that of a device using a voice coil motor for moving the imaging element holder 2, for example. Also, this configuration can realize weight reduction of the camera module MD. In addition, since this configuration does not use a voice coil motor for moving the image pickup element holder 2, even if a device using a voice coil motor is arranged next to the device, the camera module MD and the device may not be connected. It is possible to suppress magnetic interference between

In addition, in this configuration, two shape memory alloy wires SA are arranged so as to intersect in each of the four areas surrounding the imaging element IS in top view. That is, in this configuration, not all shape memory alloy wires SA are arranged parallel to the imaging plane. Therefore, this configuration can move the image pickup device holder 2 in a direction intersecting the image pickup surface.

The imaging element driving section DM1 may be configured to rotate the imaging element holder 2 around the axis of the first rotation axis RX1, which is the axis perpendicular to the imaging surface. This configuration can suppress the influence of camera shake caused by rotation about the first rotation axis RX1 on an image when shooting with a device such as a smartphone on which the camera module MD is mounted.

The imaging element driving section DM1 may be configured to move the imaging element holder 2 in a direction intersecting the imaging plane. This configuration has the advantage that the camera module MD can implement an autofocus function.

The fixed side member FB may have eight first metal members (first fixed side terminal plate 5F1 to eighth fixed side terminal plate 5F8). In this case, one end of each of the eight shape memory alloy wires SA (first wire SA1 to eighth wire SA8) may be individually connected to the corresponding first metal member. In the above embodiment, as shown in FIG. 2, one end of the first wire SA1 is connected to the first fixed terminal plate 5F1, one end of the second wire SA2 is connected to the second fixed terminal plate 5F2, and the second wire SA1 is connected to the second fixed terminal plate 5F2. One end of the 3-wire SA3 is connected to the third fixed terminal plate 5F3, one end of the fourth wire SA4 is connected to the fourth fixed-side terminal plate 5F4, and one end of the fifth wire SA5 is connected to the fifth fixed-side terminal plate 5F5. One end of the sixth wire SA6 is connected to the sixth fixed side terminal plate 5F6, one end of the seventh wire SA7 is connected to the seventh fixed side terminal plate 5F7, and one end of the eighth wire SA8 is connected to the eighth fixed side terminal plate 5F7. It is connected to the terminal plate 5F8. This configuration has the effect of facilitating the securing of conductive paths for supplying currents individually to the eight shape memory alloy wires SA.

The other ends of at least four shape memory alloy wires SA out of the eight shape memory alloy wires SA may be electrically connected to each other via conductors provided on the first movable member MB1. In this configuration, the other ends of at least four shape memory alloy wires SA out of eight shape memory alloy wires SA are connected to a common potential. Therefore, this configuration brings about the effect of further facilitating the securing of conductive paths for allowing current to be individually supplied to each of the eight shape memory alloy wires SA.

The conductor connects the second metal member (movable-side metal member 5M) to which the other ends of the at least four shape memory alloy wires SA are connected, the first movable-side member MB1, and the fixed-side member FB. An elastic metal member 6 that can be elastically deformed may be included. In this case, the fixed-side member FB may have a columnar portion (fixed-side pedestal portion 8D) in which the third metal member (conductive member CM) is embedded. Then, as shown in FIG. 7A, the fixing portions (the second fixing portion 6e2 and the fourth fixing portion 6e4) of the elastic metal member 6 are connected to the second metal member (the movable side metal member 5M), and the third metal member ( Another fixing portion (the first fixing portion 6e1 and the third fixing portion 6e3) of the elastic metal member 6 may be connected to the conductive member CM). Note that the elastic metal member 6 may be a leaf spring. This configuration brings about an effect that it becomes easier to secure a conductive path for supplying an electric current to each of the eight shape memory alloy wires SA.

In the above-described embodiment, the other ends of the eight shape memory alloy wires SA are configured to conduct with each other via the movable metal member 5M, the elastic metal member 6, and the conductive member CM. Specifically, as shown in FIG. 7A, the other ends of the first to fourth wires SA1 to SA4 are connected to the first movable terminal plate 5M1, the elastic metal member 6, the first conductive member CM1 or the second conductive member CM1. It is connected to the ground terminal via the member CM2. The other end of each of the fifth wire SA5 to the eighth wire SA8 is connected to the ground terminal through the second movable terminal plate 5M2, the elastic metal member 6, and the first conductive member CM1 or the second conductive member CM2. It is The first fixing portion 6e1 of the elastic metal member 6 is welded to the first joint surface portion CP1 (see the central view of FIG. 6) of the first conductive member CM1, and the third fixing portion 6e3 of the elastic metal member 6 are welded to the second joint surface portion CP2 (see the central view of FIG. 6) of the second conductive member CM2. Also, the first connection part ED1 (see the central view of FIG. 6) of the first conductive member CM1 is soldered to the ninth conductive pattern PT9 (see FIG. 2) of the flexible substrate 3, and the second conductive member The second connection part ED2 of CM2 (see the central view of FIG. 6) is soldered to the tenth conductive pattern PT10 of the flexible substrate 3 (see FIG. 2). Both the ninth conductive pattern PT9 and the tenth conductive pattern PT10 are connected to a ground terminal (not shown).

The fixed-side member FB may have a housing HS (cover member 4) having a shape (for example, a substantially rectangular shape) having at least four corners 4C when viewed from above. In this case, as shown in FIG. 2, the housing HS (cover member 4) has a first corner 4C1 and a third corner 4C3 located on one diagonal line, and a second corner located on the other diagonal line. It may have a portion 4C2 and a fourth corner portion 4C4. One end of each of the eight shape memory alloy wires SA is a base member that functions as a fixed side wire support portion for the fixed side member FB arranged to face the first corner portion 4C1 or the third corner portion 4C3. 8 fixed side pedestal portion 8D, and the other end of each of the eight shape memory alloy wires SA is arranged to face the second corner portion 4C2 or the fourth corner portion 4C4. It may be supported by the movable-side pedestal portion 2D of the imaging element holder 2 that functions as the movable-side wire support portion of MB1. This configuration brings about the effect of further suppressing the enlargement of the camera module MD. In addition, this configuration brings about the effect of realizing further weight reduction of the camera module MD. Note that the housing HS may be configured to have another shape such as a substantially hexagonal shape or a substantially octagonal shape when viewed from above.

The imaging element IS may be mounted on the circuit board 7 as the first printed wiring board. In this case, the circuit board 7 may be fixed to the imaging element holder 2 and connected to the flexible board 3 as a flexible second printed wiring board. Also, the circuit board 7 may be configured to be thicker than the flexible board 3 . This configuration brings about an effect that the imaging element IS can be easily integrated with the imaging element holder 2 . Note that the image pickup device IS may be provided with an IR cut filter. Also, an IR cut filter may be arranged between the image sensor IS and the lens body LS.

2 and 17, the camera module MD according to the embodiment of the present invention includes a fixed side member FB, a lens holder 20 capable of holding the lens body LS, and a An imaging element holding body 2 integrally provided with an arranged imaging element IS, a lens driving section DM2 as a first driving section for moving the lens holding body 20 with respect to the fixed side member FB, and the imaging element holding body 2 with respect to the fixed side member FB. In this case, the image pickup device driving section DM1 includes a plurality of first shape memory alloy wires (first wires SA1 to first 8 wires SA8) may be included.

In this configuration, the movement of the imaging element holder 2 is performed by a plurality of shape memory alloy wires SA. Therefore, this configuration can suppress an increase in the size of the camera module MD, and can achieve a size smaller than that of a device using a voice coil motor for moving the imaging element holder 2, for example. Also, this configuration can realize weight reduction of the camera module MD. In addition, since this configuration does not use a voice coil motor for moving the image pickup element holder 2, even if a device using a voice coil motor is arranged next to the device, the camera module MD and the device may not be connected. It is possible to suppress magnetic interference between

As shown in FIG. 2, the plurality of first shape memory alloy wires (the first wire SA1 to the eighth wire SA8) are arranged in a plan view (top view) along the optical axis direction (Z-axis direction). a first wire (first wire SA1) and a third wire (fifth wire SA5) that are spaced apart from each other with the imaging element IS interposed therebetween in a first direction (X-axis direction) that intersects with the axial direction; A second wire (third wire SA3) and a fourth wire SA3 are spaced apart from each other with the image pickup element IS interposed in a second direction (Y-axis direction) that intersects the optical axis direction and is perpendicular to the first direction. and a wire (seventh wire SA7). In this case, each of the first to fourth wires has one end fixed to the fixed side member FB (base member 8) and the other end fixed to the first movable side member MB1 (imaging element holder 2). may be The optical axis direction includes the direction of the optical axis with respect to the lens body LS and the direction parallel to the optical axis.

In this configuration, since a plurality of shape memory alloy wires SA are arranged in a well-balanced manner around the image pickup element holder 2, the image pickup element holder 2 can be controlled in various ways by controlling the current flowing through each of the shape memory alloy wires SA. can be executed.

As shown in FIG. 2, the plurality of first shape memory alloy wires (first wire SA1 to eighth wire SA8) are, in a side view (front view) along the first direction (X-axis direction), A fifth wire (second wire SA2) arranged to intersect the first wire (first wire SA1) and a side view (left side view) along the second direction (Y-axis direction) ), a sixth wire (fourth wire SA4) arranged to cross the second wire (third wire SA3) and a side view ( In rear view), the seventh wire (sixth wire SA6) arranged to cross the third wire (fifth wire SA5) and the side view along the second direction (Y-axis direction) and an eighth wire (eighth wire SA8) arranged to cross the fourth wire (seventh wire SA7) in a view (right side view). In this case, each of the fifth to eighth wires has one end fixed to the fixed side member FB (base member 8) and the other end fixed to the first movable side member MB1 (image pickup element holder 2). may be

In this configuration, each of the plurality of shape memory alloy wires SA is arranged so as to be inclined with respect to a virtual plane parallel to the XY plane including the X axis and the Y axis. Therefore, in this configuration, the length of each of the plurality of shape memory alloy wires SA can be increased compared to the case where each of the plurality of shape memory alloy wires SA is arranged parallel to the virtual plane. . Therefore, in this configuration, compared to the case where each of the plurality of shape memory alloy wires SA is arranged so as to be parallel to the virtual plane, the adjustment width (extension amount) of each of the plurality of shape memory alloy wires SA is reduced. ) can be increased. Further, in this configuration, two shape memory alloy wires SA are arranged so as to cross each other in each of the spaces on the front, back, left, and right of the image pickup device holder 2 . Therefore, this configuration can easily realize the function of moving the image pickup element holder 2 in the optical axis direction, compared to the case where each of the plurality of shape memory alloy wires SA is arranged so as to be parallel to the virtual plane. brings about the effect of

The fixed side member FB (base member 8) may have eight first metal members (fixed side metal member 5F) as shown in FIG. 4B. In this case, one end of each of the eight first shape memory alloy wires (first wire SA1 to eighth wire SA8) is individually connected to the corresponding stationary metal member 5F as shown in FIG. 7A. good too.

This configuration has the effect of making it possible to easily secure conductive paths for supplying currents individually to the eight shape memory alloy wires SA.

As shown in FIG. 17, a plurality of lens drive units DM2 as first drive units are provided between the second movable member MB2 including the lens holder 20 and the fixed member FB (upper base member 80). second shape memory alloy wires (first wire SB1 to eighth wire SB8).

In this configuration, movement of the lens holder 20 is performed by a plurality of upper shape memory alloy wires SB. Therefore, this configuration can suppress an increase in the size of the camera module MD, and can realize a smaller size than a device using a voice coil motor for moving the lens holder 20, for example. Also, this configuration can realize weight reduction of the camera module MD. In addition, since this configuration does not use a voice coil motor for moving the lens holder 20, even if a device using a voice coil motor is arranged next to the device, the distance between the device and the camera module MD is low. magnetic interference can be suppressed.

As shown in FIG. 17, the plurality of second shape memory alloy wires (first wire SB1 to eighth wire SB8) intersect the optical axis direction in plan view (top view) along the optical axis direction. A ninth wire (first wire SB1) and an eleventh wire (fifth wire SB5) which are spaced apart across the lens body LS (see FIG. 18) in the third direction (X-axis direction) , a tenth wire (third wire SB3) and a twelfth wire (third wire SB3) which are spaced apart with the lens body LS interposed therebetween in a fourth direction (Y-axis direction) that intersects the optical axis direction and is perpendicular to the third direction. (seventh wire SB7) and the ninth wire (first wire SB1) in a side view (front view) along the third direction (X-axis direction). The thirteenth wire (second wire SB2) intersects the tenth wire (third wire SB3) in a side view (left side view) along the fourth direction (Y-axis direction). The arranged fourteenth wire (fourth wire SB4) intersects the eleventh wire (fifth wire SB5) in a side view (rear view) along the third direction (X-axis direction). and a 12th wire (seventh wire SB7) in a side view (right side view) viewed along the fourth direction (Y-axis direction). and a sixteenth wire (eighth wire SB8) arranged to cross the . In this case, one end of each of the ninth wire (first wire SB1) to the sixteenth wire (eighth wire SB8) is fixed to the fixed side member FB (upper base member 80), and the other end is fixed to the second movable wire. It may be fixed to the side member MB2 (lens holder 20).

In this configuration, each of the plurality of upper shape memory alloy wires SB is arranged so as to be inclined with respect to a virtual plane parallel to the XY plane including the X axis and the Y axis. Therefore, in this configuration, the length of each of the plurality of upper shape memory alloy wires SB is increased compared to the case where each of the plurality of upper shape memory alloy wires SB is arranged parallel to the virtual plane. can be done. Therefore, in this configuration, the length adjustment width ( amount of expansion and contraction) can be increased. Also, in this configuration, two upper shape memory alloy wires SB are arranged to intersect in each of the spaces on the front, back, left and right of the lens holder 20 . Therefore, in this configuration, compared to the case where each of the plurality of upper shape memory alloy wires SB is arranged so as to be parallel to the virtual plane, it is possible to easily realize the function of causing the lens holder 20 to perform various movements. brings about the effect of Note that various movements may include translation in the Z-axis direction.

In addition, as shown in FIG. 25A, the first wire (first wire SA1) and the fifth wire (second wire SA2) are arranged in the optical axis direction with respect to the ninth wire (first wire SB1) and the thirteenth wire (SB1). wire (second wire SB2). That is, the first wire (first wire SA1), the fifth wire (second wire SA2), the ninth wire (first wire SB1), and the thirteenth wire (second wire SB2) are the cover members. 4 may be arranged along the inner surface of the first side plate portion 4A1 (see FIGS. 1A and 1B). More specifically, a first wire (first wire SA1), a fifth wire (second wire SA2), a ninth wire (first wire SB1), and a thirteenth wire (second wire SB2) may be arranged so as to overlap at least partially in top view, as shown in FIG. 25B.

Similarly, as shown in FIG. 25A, the second wire (third wire SA3) and the sixth wire (fourth wire SA4) are aligned in the optical axis direction with the tenth wire (third wire SB3) and the fourth wire SA4. It may be arranged so as to face 14 wires (fourth wire SB4). That is, the second wire (third wire SA3), the sixth wire (fourth wire SA4), the tenth wire (third wire SB3), and the fourteenth wire (fourth wire SB4) are the cover members. 4 may be arranged along the inner surface of the second side plate portion 4A2 (see FIGS. 1A and 1B). More specifically, a second wire (third wire SA3), a sixth wire (fourth wire SA4), a tenth wire (third wire SB3), and a fourteenth wire (fourth wire SB4) may be arranged so as to overlap at least partially in top view, as shown in FIG. 25B.

Similarly, as shown in FIG. 25A, the third wire (fifth wire SA5) and the seventh wire (sixth wire SA6) are arranged in the optical axis direction with respect to the eleventh wire (fifth wire SB5) and the It may be arranged so as to face fifteen wires (sixth wire SB6). That is, the third wire (fifth wire SA5), the seventh wire (sixth wire SA6), the eleventh wire (fifth wire SB5), and the fifteenth wire (sixth wire SB6) are the cover members. 4 may be arranged along the inner surface of the third side plate portion 4A3 (see FIGS. 1A and 1B). More specifically, a third wire (fifth wire SA5), a seventh wire (sixth wire SA6), an eleventh wire (fifth wire SB5), and a fifteenth wire (sixth wire SB6) may be arranged so as to overlap at least partially in top view, as shown in FIG. 25B.

Similarly, as shown in FIG. 25A , the fourth wire (seventh wire SA7) and the eighth wire (eighth wire SA8) are arranged in the optical axis direction with respect to the twelfth wire (seventh wire SB7) and the fourth wire (SB7). It may be arranged so as to face 16 wires (eighth wire SB8). That is, the fourth wire (seventh wire SA7), the eighth wire (eighth wire SA8), the twelfth wire (seventh wire SB7), and the sixteenth wire (eighth wire SB8) are the cover members. 4 may be arranged along the inner surface of the fourth side plate portion 4A4 (see FIGS. 1A and 1B). More specifically, a fourth wire (seventh wire SA7), an eighth wire (eighth wire SA8), a twelfth wire (seventh wire SB7), and a sixteenth wire (eighth wire SB8) may be arranged so as to overlap at least partially in top view, as shown in FIG. 25B.

In this configuration, the shape memory alloy wire SA and the upper shape memory alloy wire SB are arranged so as to substantially overlap when viewed from above. Therefore, in this configuration, the shape memory alloy wire SA is arranged outside the upper shape memory alloy wire SB (the side farther from the optical axis of the lens body LS) when viewed from above, or the upper shape memory alloy wire SA is arranged outside the upper shape memory alloy wire SB when viewed from above. Compared to the configuration in which the SB is arranged outside the shape memory alloy wire SA, an effect of suppressing an increase in the size of the camera module MD is achieved.

As shown in FIGS. 24A, 24B, 25A, and 25B, the fixed-side member FB (the base member 8 and the upper base member 80) are arranged in a plan view (top view) along the optical axis direction. Even if a plurality of fixed-side wire support portions (first fixed-side pedestal portion 8D1, second fixed-side pedestal portion 8D2, first fixed-side pedestal portion 80D1, and second fixed-side pedestal portion 80D2) are provided at different positions, good. In this case, one end of each of the plurality of first shape memory alloy wires (first wire SA1 to eighth wire SA8) is connected to two of the plurality of fixed wire support portions, the first fixed wire support portions ( It may be supported by either the first fixed side pedestal portion 8D1) or the third fixed side wire support portion (second fixed side pedestal portion 8D2). Further, one end of each of the plurality of second shape memory alloy wires (first wire SB1 to eighth wire SB8) is the second fixed wire support portion which is another two of the plurality of fixed wire support portions. It may be supported by either the (first fixed side pedestal portion 80D1) or the fourth fixed side wire support portion (second fixed side pedestal portion 80D2).

This configuration has the effect of facilitating the layout of the 16 shape memory alloy wires. Also, in this configuration, 16 shape memory alloy wires are arranged in the housing HS with high space efficiency. Therefore, this configuration brings about the effect of further suppressing the enlargement of the camera module MD.

As shown in FIGS. 24A, 24B, 25A, and 25B, the other end of each of the plurality of first shape memory alloy wires (first wire SA1 to eighth wire SA8) is connected to the first movable side member MB1. It may be supported by any one of a plurality of movable-side wire support portions (first movable-side pedestal portion 2D1 and second movable-side pedestal portion 2D2). Further, the other ends of the plurality of second shape memory alloy wires (first wire SB1 to eighth wire SB8) are attached to the plurality of movable side wire support portions (first movable side pedestal portion 20D1) in the second movable side member MB2. and the second movable side pedestal portion 20D2). In this case, in the optical axis direction (Z-axis direction), each of the plurality of movable-side wire support portions (the first movable-side pedestal portion 2D1 and the second movable-side pedestal portion 2D2) of the first movable-side member MB1 is arranged on the fixed side. Even if it faces either the second fixed-side wire support portion (first fixed-side pedestal portion 80D1) or the fourth fixed-side wire support portion (second fixed-side pedestal portion 80D2) in the member FB (upper base member 80) good. Similarly, each of the plurality of movable-side wire support portions (the first movable-side pedestal portion 20D1 and the second movable-side pedestal portion 20D2) in the second movable-side member MB2 is the first wire support portion in the fixed-side member FB (base member 8). It may face either the fixed-side wire support portion (first fixed-side pedestal portion 8D1) or the third fixed-side wire support portion (second fixed-side pedestal portion 8D2). In the example shown in FIGS. 24A and 24B, the first movable side pedestal 2D1 faces the first fixed side pedestal 80D1 in the optical axis direction (Z-axis direction), and the second movable side pedestal 2D2 faces the second movable side pedestal 80D1. 2 facing the fixed side pedestal portion 80D2. In addition, in the optical axis direction (Z-axis direction), the first movable side seat portion 20D1 faces the first fixed side seat portion 8D1, and the second movable side seat portion 20D2 faces the second fixed side seat portion 8D2. is doing.

In this configuration, the first movable member MB1, the second movable member MB2, and the fixed member FB are arranged in the housing HS with high space efficiency. Therefore, this configuration brings about the effect of further suppressing the enlargement of the camera module MD.

The fixed-side member FB may have eight second metal members (first fixed-side terminal plate 50F1 to eighth fixed-side terminal plate 50F8). In this case, one end of each of the eight second shape memory alloy wires (first wire SB1 to eighth wire SB8) may be individually connected to the corresponding second metal member (fixed side metal member 50F). good.

In the above embodiment, as shown in FIG. 17, one end of the first wire SB1 is connected to the first fixed terminal plate 50F1, one end of the second wire SB2 is connected to the second fixed terminal plate 50F2, and the second wire SB1 is connected to the second fixed terminal plate 50F2. One end of the 3-wire SB3 is connected to the third fixed terminal plate 50F3, one end of the fourth wire SB4 is connected to the fourth fixed-side terminal plate 50F4, and one end of the fifth wire SB5 is connected to the fifth fixed-side terminal plate 50F5. One end of the sixth wire SB6 is connected to the sixth fixed terminal plate 50F6, one end of the seventh wire SB7 is connected to the seventh fixed terminal plate 50F7, and one end of the eighth wire SB8 is connected to the eighth fixed terminal plate 50F7. It is connected to terminal plate 50F8.

The other ends of at least four of the eight upper shape memory alloy wires SB (first wire SB1 to eighth wire SB8) are provided on the second movable member MB2. may be electrically connected to each other via the conductors (the movable metal member 50M and the upper elastic metal member 60).

In this configuration, the other ends of at least four upper shape memory alloy wires SB out of the eight upper shape memory alloy wires SB are connected to a common potential. Therefore, this configuration brings about the effect of facilitating the securing of conductive paths for allowing current to be individually supplied to each of the eight upper shape memory alloy wires SB.

The imaging element driving section DM1 as a second driving section moves the imaging element holding body 2 with respect to the fixed side member FB in the optical axis direction, in the direction perpendicular to the optical axis direction, and rotates the optical axis. , the imaging surface of the imaging device IS may be configured to move such that the imaging plane is tilted. Further, the lens driving unit DM2 as a first driving unit moves the lens holding body 20 relative to the fixed side member FB in the optical axis direction, in the direction perpendicular to the optical axis direction, and moves the light of the lens body LS. It may be configured to achieve a tilting movement of the axis.

In this configuration, various movements of the image pickup element holder 2 relative to the fixed member FB by the image pickup element driver DM1 and various movements of the lens holder 20 relative to the fixed member FB by the lens driver DM2 are realized at the same time. . Therefore, this configuration brings about the effect of being able to cope with camera shake in various directions. In addition, since this configuration can move both the image sensor holder 2 and the lens holder 20 at the same time, it can be used for camera shake correction as compared to the case where either one of the image sensor holder 2 or the lens holder 20 is moved. This brings about an effect that the correction width can be increased. In addition, since this configuration can move both the image sensor holder 2 and the lens holder 20 at the same time, automatic focus adjustment and camera shake are less likely to occur than when either one of the image sensor holder 2 or the lens holder 20 is moved. This brings about an effect that the time required for correction can be shortened.

The preferred embodiment of the present invention has been described in detail above. However, the invention is not limited to the embodiments described above. Various modifications and replacements may be applied to the above-described embodiments without departing from the scope of the present invention. Moreover, each of the features described with reference to the above-described embodiments may be combined as appropriate as long as they are not technically inconsistent.

For example, in the above-described embodiment, the elastic metal member 6 is composed of one part, but it may be composed of two parts. For example, the elastic metal member 6 may be divided into a first elastic metal member and a second elastic metal member at each of the central portion of the first fixing portion 6e1 and the central portion of the third fixing portion 6e3. good. In this case, the first elastic metal member may be configured to be connected to the first conductive member CM1 and not connected to the second conductive member CM2. Also, the second elastic metal member may be configured to be connected to the second conductive member CM2 and not to be connected to the first conductive member CM1. Similarly, the upper elastic metal member 60 is composed of one part, but may be composed of two parts. For example, the upper elastic metal member 60 is divided into a first upper elastic metal member and a second upper elastic metal member at the central portion of the second fixing portion 60e2 and the central portion of the fourth fixing portion 60e4. may be In this case, the first upper elastic metal member may be configured to be connected to the eleventh conductive member CM11 and not to be connected to the twelfth conductive member CM12. Also, the second upper elastic metal member may be configured to be connected to the twelfth conductive member CM12 and not to be connected to the eleventh conductive member CM11.

Further, in the above-described embodiment, the position of the first movable member MB1 is detected based on the output of the magnetic sensor, but it is not detected based on the output of the sensor that detects the resistance value of the shape memory alloy wire SA. good too. The same applies to the position of the second movable side member MB2.

Moreover, 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, and the conductive pattern formed on the surface of the base member 8 may be fixed. may be Similarly, the movable-side metal member 5M is fixed to the image pickup element holder 2 with an adhesive, but it may be embedded in the image pickup element holder 2, and the conductive member 5M formed on the surface of the image pickup element holder 2 may be used. It can be a pattern. In addition, although fixed-side metal member 50F is fixed to upper base member 80 with an adhesive, fixed-side metal member 50F may be embedded in upper base member 80, and may be a conductive pattern formed on the surface of upper base member 80. good too. Similarly, the movable-side metal member 50M is fixed to the lens holder 20 with an adhesive, but it may be embedded in the lens holder 20 and may be a conductive pattern formed on the surface of the lens holder 20. may

This application claims priority based on Japanese Patent Application No. 2021-060169 filed on March 31, 2021, and the entire contents of this Japanese Patent Application are incorporated herein by reference.

2... Imaging element holder 2D... Movable side pedestal 2D1... First movable side pedestal 2D2... Second movable side pedestal 2F... Frame 2G... Groove 2S... · Protruding portion 2S1... First protruding portion 2S2... Second protruding portion 2T... Protruding portion 3... Flexible substrate 3e... Outer portion 3i... Inner portion 4- ... Cover member 4A... Peripheral wall part 4A1... First side plate part 4A2... Second side plate part 4A3... Third side plate part 4A4... Fourth side plate part 4B... Top plate part 4C... corner 4C1...first corner 4C2...second corner 4C3...third corner 4C4...fourth corner 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・・・· 5th fixed side terminal plate 5F6... 6th fixed side terminal plate 5F7... 7th fixed side terminal plate 5F8... 8th fixed side terminal plate 5M... Movable side metal member 5M1... No. 1 movable side terminal plate 5M2... second movable side terminal plate 6... elastic metal member 6e1... first fixed part 6e2... second fixed part 6e3... third fixed part 6e4... Fourth fixing part 6g1... First arm part 6g2... Second arm part 6g3... Third arm part 6g4... Fourth arm part 6H1... First through hole 6H2... Second Through hole 6H3... Third through hole 6H4... Fourth through hole 6H5... Fifth through hole 6H6... Sixth through hole 6H7... Seventh through hole 6H8... Eighth through hole 6H9... 9th through hole 6H10... 10th through hole 6H11... 11th through hole 6H12... 12th through hole 7... circuit board 8... base member 8D... fixed side Pedestal 8D1... First fixed side pedestal 8D2... Second fixed side pedestal 8E... Side 8E1... First side 8E2... Second side 8E3... Third Side 8E4 Fourth side 8K Opening 8T Projection 20 Lens holder 20D Movable side pedestal 20D1 First movable pedestal 20D2 Second movable side pedestal portion 20F...Frame body 20G...Groove portion 20S...Protruding portion 20S1... First projecting portion 20S2 Second projecting portion 20T Projecting portion 50 Upper metal member 50F Fixed side metal member 50F1 First fixed terminal plate 50F2 Second 2 fixed side terminal plate 50F3... 3rd fixed side terminal plate 50F4... 4th fixed side terminal plate 50F5... 5th fixed side terminal plate 50F6... 6th fixed side terminal plate 50F7... No. 7 fixed side terminal plate 50F8... 8th fixed side terminal plate 50M... movable side metal member 50M1... first movable side terminal plate 50M2... second movable side terminal plate 60... upper elastic metal Member 60e1... First fixing part 60e2... Second fixing part 60e3... Third fixing part 60e4... Fourth fixing part 60g1... First arm part 60g2... Second arm part 60g3 ... 3rd arm 60g4... 4th arm 60H1... 1st through hole 60H2... 2nd through hole 60H3... 3rd through hole 60H4... 4th through hole 60H5... · Fifth through hole 60H6... Sixth through hole 60H7... Seventh through hole 60H8... Eighth through hole 60H9... Ninth through hole 60H10... Tenth through hole 60H11... Third 11 through-hole 60H12... 12th through-hole 80... upper base member 80D... fixed side pedestal portion 80D1... first fixed side pedestal portion 80D2... second fixed side pedestal portion 80E... Side 80E1... First side 80E2... Second side 80E3... Third side 80E4... Fourth side 80K... Opening 80T... Protruding part BP... Bending Piece CM... conductive member CM1... first conductive member CM2... second conductive member CM11... eleventh conductive member CM12... twelfth conductive member CP... bonding surface portion CP1... second 1 joint surface portion CP2... 2nd joint surface portion CP11... 11th joint surface portion CP12... 12th joint surface portion CT... connecting portion CT1... first connecting portion CT2... second connecting portion CT3 ... 3rd connection part CT4... 4th connection part CT5... 5th connection part CT6... 6th connection part CT7... 7th connection part CT8... 8th connection part CT11... · 11th connection CT12... 12th connection CT13... 13th connection CT14... 14th contact Continuation part CT15... 15th connection part CT16... 16th connection part CT17... 17th connection part CT18... 18th connection part DM1... Imaging element drive part DM2... Lens drive part ED ... connection part ED1... first connection part ED2... second connection part ED11... eleventh connection part ED12... twelfth connection part FB... fixed side member HS... housing IS... image sensor J1 to J4... holding part LS... lens body MB1... first movable side member MB2... second movable side member MD... camera module PT1... first Conductive pattern PT2... Second conductive pattern PT3... Third conductive pattern PT4... Fourth conductive pattern PT5... Fifth conductive pattern PT6... Sixth conductive pattern PT7... Seventh conductive pattern PT8... 8th conductive pattern PT9... 9th conductive pattern PT10... 10th conductive pattern RX1... 1st rotation axis RX2... 2nd rotation axis RX3... 3rd rotation axis RX4/ ... 4th rotation axis RX5... 5th rotation axis RX6... 6th rotation axis SA... Shape memory alloy wire SA1... 1st wire SA2... 2nd wire SA3... 3rd Wire SA4... Fourth wire SA5... Fifth wire SA6... Sixth wire SA7... Seventh wire SA8... Eighth wire SB... Upper shape memory alloy wire SB1... Third 1st wire SB2... 2nd wire SB3... 3rd wire SB4... 4th wire SB5... 5th wire SB6... 6th wire SB7... 7th wire SB8... 8th wire wire

Claims

a fixed side member;
a lens holder capable of holding a lens body;
an imaging element holder integrally provided with an imaging element arranged to face the lens body;
A camera module comprising a first driving section that moves the lens holder with respect to the fixed side member,
a second driving unit for moving the imaging element holder with respect to the stationary member;
The second drive unit includes a plurality of first shape memory alloy wires provided between a first movable member including the image pickup device holder and the fixed member.
A camera module characterized by:
The plurality of first shape memory alloy wires are arranged in a first direction intersecting the optical axis direction in a plan view along the optical axis direction so as to be spaced apart from each other with the imaging element interposed therebetween. A wire and a third wire, and a second wire and a fourth wire which are spaced apart from each other with the imaging element interposed therebetween in a second direction that intersects the optical axis direction and is perpendicular to the first direction. and including
Each of the first wire to the fourth wire has one end fixed to the fixed side member and the other end fixed to the first movable side member,
A camera module according to claim 1 .
The plurality of first shape memory alloy wires includes, in a side view along the first direction, a fifth wire arranged to intersect the first wire and a A sixth wire arranged to intersect the second wire in a side view along the first direction, and a sixth wire arranged to intersect the third wire in a side view along the first direction a seventh wire arranged in the second direction, and an eighth wire arranged to intersect the fourth wire in a side view along the second direction,
Each of the fifth wire to the eighth wire has one end fixed to the fixed side member and the other end fixed to the first movable side member,
3. A camera module according to claim 2.
The fixed side member has eight first metal members, and one end of each of the eight first shape memory alloy wires is individually connected to the corresponding first metal member,
4. A camera module according to claim 3.
The first drive unit includes a plurality of second shape memory alloy wires provided between a second movable member including the lens holder and the fixed member.
5. The camera module according to claim 3 or 4.
The plurality of second shape memory alloy wires are arranged in a plan view along the optical axis direction, and are spaced apart across the lens body in a third direction intersecting the optical axis direction. and an eleventh wire, and a tenth wire and a twelfth wire that are spaced apart across the lens body in a fourth direction that intersects the optical axis direction and is perpendicular to the third direction. A wire, a thirteenth wire arranged to intersect with the ninth wire in a side view along the third direction, and a side view along the fourth direction, A fourteenth wire arranged to cross the tenth wire, and a fifteenth wire arranged to cross the eleventh wire in a side view along the third direction. and a sixteenth wire arranged to cross the twelfth wire in a side view along the fourth direction,
Each of the ninth wire to the sixteenth wire has one end fixed to the fixed side member and the other end fixed to the second movable side member,
6. A camera module according to claim 5.
the first wire and the fifth wire are arranged to face the ninth wire and the thirteenth wire in the optical axis direction;
the second wire and the sixth wire are arranged to face the tenth wire and the fourteenth wire in the optical axis direction;
The third wire and the seventh wire are arranged to face the eleventh wire and the fifteenth wire in the optical axis direction, and
The fourth wire and the eighth wire are arranged to face the twelfth wire and the sixteenth wire in the optical axis direction,
7. A camera module according to claim 6.
The stationary member has a plurality of stationary wire support portions at different positions in a plan view along the optical axis direction,
One end of each of the plurality of first shape memory alloy wires is supported by either a first fixed wire support portion or a third fixed wire support portion, which are two of the plurality of fixed wire support portions. is,
One end of each of the plurality of second shape memory alloy wires is either a second fixed wire support portion or a fourth fixed wire support portion, which are other two of the plurality of fixed wire support portions. supported by
The camera module according to claim 6 or 7.
The other end of each of the plurality of first shape memory alloy wires is supported by one of the plurality of movable wire support portions of the first movable member,
The other end of each of the plurality of second shape memory alloy wires is supported by one of the plurality of movable wire support portions of the second movable member,
in the direction of the optical axis,
each of the plurality of movable-side wire support portions of the first movable-side member faces either the second fixed-side wire support portion or the fourth fixed-side wire support portion of the fixed-side member;
Each of the plurality of movable-side wire support portions of the second movable-side member faces either the first fixed-side wire support portion or the third fixed-side wire support portion of the fixed-side member,
9. A camera module according to claim 8.
The fixed side member has eight second metal members, and one end of each of the eight second shape memory alloy wires is individually connected to the corresponding second metal member,
A camera module according to any one of claims 6 to 9.
The second driving section moves the imaging element holder with respect to the stationary member in the optical axis direction, in the direction perpendicular to the optical axis direction, and rotates the imaging element around the optical axis. Realizes movement that tilts the imaging plane of
The first driving section moves the lens holder with respect to the stationary member in the optical axis direction, in the direction perpendicular to the optical axis direction, and inclines the optical axis of the lens body. realize movement,
A camera module according to any one of claims 5 to 10.