Lens driving device and camera module

Abstract

Provided is a lens driving device capable of saving power. A lens drive device (101) is provided with: a lens holding member (2) that can move in the optical axis direction relative to a support member (3); and a plurality of shape memory alloy wires (SA) that are provided between the support member and the lens holding member and move the lens holding member in the optical axis direction. The support member has a guide member (7) that guides the lens holding member to move in the optical axis direction, and a first magnetic member (9). The lens holding member has: a groove portion (2V) that slides with the guide member and is guided by the guide member; and a second magnetic member (10) disposed at a position separated from the first magnetic member in a direction intersecting the optical axis direction. The first magnetic component and the second magnetic component are configured to be composed of magnets, and the guide component and the groove part (2V) are in a contact state by attractive force generated between the first magnetic component and the second magnetic component regardless of the position of the lens holding component in the optical axis direction.

Description

Technical Field

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

[0002] Conventionally, a lens driving device using a shape memory alloy wire is known (see Patent Document 1). This device is configured to move a lens holding member by passing an electric current through the shape memory alloy wire to heat and shrink the shape memory alloy wire.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2019 / 034860 Summary of the invention

[0006] Technical problem that the invention will solve

[0007] However, in this device, there is a risk that the lens holding member moves when no current flows through the shape memory alloy wire, so in the case of shooting a moving image, in order to maintain the focus of the lens, it is necessary to continue to flow current through the shape memory alloy wire. Therefore, this device has a risk of making power saving (low power consumption) difficult.

[0008] Therefore, it is desirable to provide a lens driving device that can achieve power saving.

[0009] Means for solving technical problems

[0010] A lens driving device according to one embodiment of the present invention comprises: a supporting component; a lens holding component having a cylindrical portion capable of configuring a lens body and capable of moving in the optical axis direction relative to the supporting component; and a plurality of shape memory alloy wires arranged between the supporting component and the lens holding component so that the lens holding component moves in the optical axis direction, the supporting component having a guide portion for guiding the movement of the lens holding component in the optical axis direction and a first magnetic component, the lens holding component having: a guided portion that slides with the guide portion and is guided by the guide portion; and a second magnetic component that is arranged at a position separated from the first magnetic component in a direction intersecting the optical axis direction, the first magnetic component and the second magnetic component being arranged such that at least one of them is composed of a magnet, and a force that presses the guiding portion and the guided portion against each other is applied in a direction intersecting the optical axis direction by a magnetic force generated between the first magnetic component and the second magnetic component, so that the guiding portion and the guided portion are in contact with each other regardless of the position of the lens holding component in the optical axis direction.

[0011] Effects of the Invention

[0012] The lens driving device described above can achieve power saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of a camera module according to an embodiment of the present disclosure.

[0014] Figure 2 It is an exploded perspective view of a lens driving device according to an embodiment of the present disclosure.

[0015] Figure 3 It is an exploded perspective view of a main body of the lens driving device according to an embodiment of the present disclosure.

[0016] Figure 4 It is a three-dimensional view of the fixed support component.

[0017] Figure 5 It is a top view of the fixed support component.

[0018] Figure 6 It is a bottom view of the fixed support component.

[0019] Figure 7 It is a perspective view of a lens holding component.

[0020] Figure 8 It is a top view of the lens holding component.

[0021] Fig. 9 It is a bottom view of the lens holding component.

[0022] Fig.10 It is a three-dimensional view of the supporting component.

[0023] Fig.11 is a top view of the support component.

[0024] Fig.12 It is a bottom view of the supporting component.

[0025] Fig.13 This is a diagram showing the arrangement of the movable side metal component, the fixed side metal component, and the upper side shape memory alloy wire.

[0026] Fig.14 This is a diagram showing the arrangement of the lens-side metal component, the support-side metal component, and the lower-side shape memory alloy wire.

[0027] Fig.15 It is a top view of the movable side metal component, the fixed side metal component, the upper side shape memory alloy wire, and the lens holding component.

[0028] Fig.16 It is a three-dimensional diagram of a movable side metal component, a fixed side metal component, a flexible metal component, an upper side conductive component, and an upper side shape memory alloy wire.

[0029] Fig.17 It is a three-dimensional diagram of a support-side metal component, a lens-side metal component, an upper conductive component, a lower conductive component, and a lower shape memory alloy wire.

[0030] Fig.18 FIG. 1 is a diagram showing an example of a path of a current flowing through the first lower wire.

[0031] Fig.19 FIG. 1 is a diagram showing an example of a path of a current flowing through the second lower wire.

[0032] Fig. 20 FIG. 1 is a diagram showing an example of a path of a current flowing through the third lower wire.

[0033] Fig.21 : is a diagram showing an example of the path of the current flowing through the fourth lower wire.

[0034] Fig. 22 This is a layout diagram of a lens holding component, a support-side metal component, a lens-side metal component, a guide component, a first magnetic component, a second magnetic component, a yoke, and a lower shape memory alloy wire.

[0035] Fig.23 It is a front view of a lens holding component, a supporting component, a supporting side metal component, a lens side metal component, a guiding component, a first magnetic component, a second magnetic component, and a lower side shape memory alloy wire.

[0036] Fig.24 It is a bottom view of the support component on which the magnet is mounted.

[0037] Fig.25 It is a perspective cross-sectional view of the lower cover member and the support member. DETAILED DESCRIPTION

[0038] Hereinafter, the lens driving device 101 and the camera module CM according to the embodiment of the present disclosure will be described with reference to the drawings. Figure 1 It is a perspective view of the camera module CM. Figure 2 The configuration is an exploded perspective view of the lens driving device 101 of the camera module CM. Figure 3 It is an exploded perspective view of the main body portion MN constituting the lens driving device 101 .

[0039] exist Figure 1 In , X1 represents one direction of the X axis constituting the three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X axis. In addition, Y1 represents one direction of the Y axis constituting the three-dimensional orthogonal coordinate system, and Y2 represents the other direction of the Y axis. Similarly, Z1 represents one direction of the Z axis constituting the three-dimensional orthogonal coordinate system, and Z2 represents the other direction of the Z axis. Figure 1In the figure, the X1 side of the lens driving device 101 corresponds to the front side (front side) of the lens driving device 101, and the X2 side of the lens driving device 101 corresponds to the rear side (back side) of the lens driving device 101. In addition, the Y1 side of the lens driving device 101 corresponds to the left side of the lens driving device 101, and the Y2 side of the lens driving device 101 corresponds to the right side of the lens driving device 101. In addition, the Z1 side of the lens driving device 101 corresponds to the upper side (subject side) of the lens driving device 101, and the Z2 side of the lens driving device 101 corresponds to the lower side (photographic element side) of the lens driving device 101. The same is true in other figures.

[0040] Camera module CM Figure 1 As shown, it includes a lens driving device 101, a lens body LS mounted on a lens holding component 2, and an imaging element IS mounted on an external substrate (not shown) in a manner opposite to the lens body LS. The lens body LS is a cylindrical lens barrel including at least one lens and has an optical axis OA. In the example shown in the figure, the lens driving device 101 having a substantially rectangular shape is mounted on an external substrate for mounting the imaging element IS. The imaging element IS can also be mounted on the lower surface of the lens driving device 101 via a sensor holder (not shown).

[0041] Specifically, the lens driving device 101 is as follows Figure 1 as well as Figure 2 As shown in FIG. 1 , the cover member 4 includes a cover member 4 as a fixed side member FB. The cover member 4 includes an upper cover member 4U and a lower cover member 4L. Figure 2 As shown, it has a box-shaped appearance that defines the storage portion 4S. In addition, the cover component 4 is configured to function as a frame HS that covers the various components. In the present embodiment, the cover component 4 is formed of a magnetic metal. Therefore, the cover component 4 also functions as an electromagnetic shield. In particular, the lower cover component 4L is configured to function as an electromagnetic field shield to suppress the electric field generated by the lens drive device 101 from becoming image noise for the imaging element IS. In addition, in the example shown in the figure, the lower cover component 4L is formed of a magnetic metal so that the outer force application unit EN described later can be formed, but the upper cover component 4U can also be formed of a non-magnetic metal.

[0042] In the illustrated example, the upper cover part 4U has a rectangular cylindrical first outer peripheral wall portion 4A and a rectangular ring-shaped and flat top plate portion 4B continuously provided with the upper end (end on the Z1 side) of the first outer peripheral wall portion 4A. A circular opening 4K is formed in the center of the top plate portion 4B. The first outer peripheral wall portion 4A includes a first side plate portion 4A1 to a fourth side plate portion 4A4. The first side plate portion 4A1 and the third side plate portion 4A3 are opposite to each other, and the second side plate portion 4A2 and the fourth side plate portion 4A4 are opposite to each other. Moreover, the first side plate portion 4A1 and the third side plate portion 4A3 extend perpendicularly relative to the second side plate portion 4A2 and the fourth side plate portion 4A4.

[0043] Similarly, the lower cover member 4L is as shown in FIG. Figure 2 As shown, it has a second peripheral wall portion 4C in the shape of a rectangular tube and a bottom plate portion 4D in the shape of a rectangular ring and a flat plate which is continuously arranged with the lower end (the end on the Z2 side) of the second peripheral wall portion 4C. A circular opening 4M is formed in the center of the bottom plate portion 4D. The second peripheral wall portion 4C includes a first side plate portion 4C1 to a fourth side plate portion 4C4. The first side plate portion 4C1 and the third side plate portion 4C3 are opposite to each other, and the second side plate portion 4C2 and the fourth side plate portion 4C4 are opposite to each other. Moreover, the first side plate portion 4C1 and the third side plate portion 4C3 extend vertically relative to the second side plate portion 4C2 and the fourth side plate portion 4C4.

[0044] The upper cover member 4U is as follows Figure 1 As shown, the first outer peripheral wall portion 4A is bonded to the lower cover member 4L by an adhesive. Specifically, the first outer peripheral wall portion 4A is configured to cover a portion of the second outer peripheral wall portion 4C. Figure 2 As shown in FIG. 1 , the main body MN is accommodated in the cover member 4 that functions as the frame body HS.

[0045] like Figure 3 As shown, the main body MN includes a fixed support component 1, a lens holding component 2, a support component 3, a metal component 5, a flexible metal component 6, a guide component 7, a magnet 8, a first magnetic component 9, a second magnetic component 10, a yoke 11, a conductive component CN, and a shape memory alloy wire SA. In addition, the lens holding component 2 and the support component 3 constitute a movable side component MB.

[0046] The fixed support member 1 is formed by injection molding using a synthetic resin such as a liquid crystal polymer (LCP). Figure 3As shown, it has a roughly rectangular outline when viewed from above, and has an opening 1K in the center. Specifically, the fixed support member 1 includes a roughly rectangular ring-shaped base 1B configured in a manner to surround the circular opening 1K, and a leg 1D formed to extend downward from the outer periphery of the base 1B. The leg 1D includes a first leg 1D1 to a fourth leg 1D4. In the example shown in the figure, the first leg 1D1 and the second leg 1D2 are arranged to face each other in the X-axis direction across the optical axis OA. The third leg 1D3 and the fourth leg 1D4 are arranged to face each other in the Y-axis direction across the optical axis OA.

[0047] The lens holding member 2 is formed by injection molding of a synthetic resin such as a liquid crystal polymer (LCP), and is configured to have an opening 2K that penetrates in the vertical direction and can hold the lens body LS. Figure 3 The lens LS is shown as comprising: a cylindrical portion 12 formed to extend along the optical axis OA, and a seat portion 2D formed to protrude radially outward from the cylindrical portion 12. In the example shown in the figure, the lens body LS is configured to be fixed to the inner peripheral surface of the cylindrical portion 12 by an adhesive. A spiral groove may also be formed on the inner peripheral surface of the cylindrical portion 12 so that the adhesive can diffuse between the inner peripheral surface of the cylindrical portion 12 and the lens body LS.

[0048] The base 2D includes a first base 2D1 and a second base 2D2. The first base 2D1 and the second base 2D2 are disposed on opposite sides of the optical axis OA. The lens-side metal members 5L are mounted on each of the two bases 2D.

[0049] The support member 3 is formed by injection molding a synthetic resin such as a liquid crystal polymer (LCP). In the present embodiment, the support member 3 has a substantially rectangular outline when viewed from above and has an opening 3K in the center. Figure 3 As shown, it is a substantially rectangular ring-shaped member arranged so as to surround the circular opening 3K.

[0050] The shape memory alloy wire SA is an example of a shape memory actuator, and constitutes a driving unit DM that drives the movable side component MB. In the example shown in the figure, the shape memory alloy wire SA includes an upper shape memory alloy wire SAU and a lower shape memory alloy wire SAD. Moreover, the upper shape memory alloy wire SAU includes a first upper wire SAU1 to a fourth upper wire SAU4, and the lower shape memory alloy wire SAD includes a first lower wire SAD1 to a fourth lower wire SAD4. The shape memory alloy wire SA increases in temperature when current flows through it, and contracts as the temperature rises. The driving unit DM can move the movable side component MB by utilizing the contraction of the shape memory alloy wire SA. In the example shown in the figure, the driving unit DM includes a first driving unit DM1 that moves the lens holding component 2 relative to the support component 3 in the optical axis direction, and a second driving unit DM2 that moves the support component 3 relative to the fixed side component FB in a direction perpendicular to the optical axis direction. In addition, the optical axis direction includes the direction of the optical axis OA of the lens body LS and the direction parallel to the optical axis OA. The first driving part DM1 is composed of the lower shape memory alloy wire SAD, and the second driving part DM2 is composed of the upper shape memory alloy wire SAU.

[0051] The flexible metal member 6 constitutes a conductive connecting member that connects the fixed support member 1 and the support member 3. In the present embodiment, the flexible metal member 6 is made of a metal plate mainly made of a copper alloy, a titanium-copper alloy (titanium-copper), or a copper-nickel alloy (nickel-tin-copper). In addition, the flexible metal member 6 can also be configured to function as an elastic support member that can elastically support the support member 3 on the fixed support member 1.

[0052] In the example shown in the figure, the flexible metal part 6 has a base fixing part 6N fixed to the fixed support part 1, a support fixing part 6E fixed to the support part 3, and a flexible arm part 6G connecting the base fixing part 6N and the support fixing part 6E. In addition, the base fixing part 6N includes a first base fixing part 6N1 and a second base fixing part 6N2, and the support fixing part 6E includes a first support fixing part 6E1, a second support fixing part 6E2, and a third support fixing part 6E3 that is substantially circular in a plan view. In addition, the flexible arm part 6G includes a first flexible arm part 6G1 connecting the first base fixing part 6N1 and the third support fixing part 6E3, and a second flexible arm part 6G2 connecting the second base fixing part 6N2 and the third support fixing part 6E3.

[0053] The metal component 5 is configured to fix the end of the shape memory alloy wire SA. In the present embodiment, the metal component 5 is formed of a non-magnetic metal and includes a support side metal component 5S as a first metal component, a lens side metal component 5L as a second metal component, a fixed side metal component 5F as a third metal component, and a movable side metal component 5M as a fourth metal component. The support side metal component 5S is configured to be fixed to the side surface of the support component 3, the lens side metal component 5L is configured to be fixed to the seat portion 2D of the lens holding component 2, the fixed side metal component 5F is configured to be fixed to the upper surface of the fixed support component 1, and the movable side metal component 5M is configured to be fixed to the upper surface of the support component 3.

[0054] More specifically, the support side metal component 5S is also referred to as a support side connection plate, and includes a first support side connection plate 5S1 to a fourth support side connection plate 5S4. The lens side metal component 5L is also referred to as a lens side connection plate, and includes a first lens side connection plate 5L1 and a second lens side connection plate 5L2. The fixed side metal component 5F is also referred to as a fixed side connection plate, and includes a first fixed side connection plate 5F1 to a fourth fixed side connection plate 5F4. The movable side metal component 5M is also referred to as a movable side connection plate, and includes a first movable side connection plate 5M1 to a fourth movable side connection plate 5M4.

[0055] One end of each of the first lower wire SAD1 to the fourth lower wire SAD4 is fixed to the support side metal member 5S by crimping or welding, etc., and the other end is fixed to the lens side metal member 5L by crimping or welding, etc. Moreover, the first lower wire SAD1 to the fourth lower wire SAD4 are respectively arranged to be stretched straight along the inner surface of the second peripheral wall portion 4C of the lower cover member 4L when current flows, and are configured to support the lens holding member 2 so as to be movable relative to the support member 3 in the optical axis direction.

[0056] One end of each of the first upper wire SAU1 to the fourth upper wire SAU4 is fixed to the fixed-side metal member 5F by crimping or welding, etc., and the other end is fixed to the movable-side metal member 5M by crimping or welding, etc. Moreover, the first upper wire SAU1 to the fourth upper wire SAU4 are respectively arranged to be stretched straight along the lower surface of the top plate portion 4B of the upper cover member 4U when current flows, and are configured to support the support member 3 so as to be movable relative to the fixed support member 1 in a direction perpendicular to the optical axis OA.

[0057] The guide component 7 is an example of an inner guide portion IG which is a guide portion for guiding the movement of the lens holding component 2 in the direction of the optical axis, and is mounted on the support component 3. The "inner side" in the inner guide portion IG refers to a guide portion which is arranged at a position inward of the outer guide portion EG described later (a position close to the center of the lens drive device 101) in the lens drive device 101. However, the inner guide portion IG may also be arranged at a position outward of the outer guide portion EG. In the example shown in the figure, the guide component 7 is formed of metal and has a substantially cylindrical portion including a semi-cylindrical upper half and a cylindrical lower half. In addition, the guide component 7 includes a rear guide component 7B mounted on the left rear portion of the support component 3 and a front guide component 7F mounted on the right front portion of the support component 3. In addition, the guide component 7 may include one or more substantially hemispherical portions instead of the substantially cylindrical portion. In addition, the guide component 7 may also be formed of a synthetic resin. In this case, the guide component 7 may also be integrated with the support component 3 formed of a synthetic resin.

[0058] The lens holding member 2 has a groove 2V for accommodating the guide member 7. The groove 2V constitutes an inner guided portion IGD guided by the guide member 7 as the inner guide portion IG. Specifically, the guide member 7 fixed to the support member 3 constitutes the inner guide portion IG for guiding the lens holding member 2 to be moved along the optical axis direction, and the groove 2V formed in the lens holding member 2 for accommodating the guide member 7 constitutes the inner guided portion IGD guided by the inner guide portion IG. In the example shown in the figure, the groove 2V includes a rear groove 2VB formed in the left rear portion of the lens holding member 2 and a front groove 2VF formed in the right front portion of the lens holding member 2.

[0059] The magnet 8 is an example of a component constituting the outer force unit EN, which is mounted on the support member 3 and serves as a force unit that acts to attract the fixed side member FB and the support member 3 to each other. The "outer side" in the outer force unit EN refers to a force unit that is arranged on the outer side (away from the center of the lens drive device 101) of the inner force unit IN described later in the lens drive device 101. However, the outer force unit EN can also be arranged on the inner side of the inner force unit IN. In the example shown in the figure, the magnet 8 is a roughly rectangular parallelepiped magnet magnetized by two poles, and cooperates with the bottom plate portion 4D of the lower cover member 4L formed of a magnetic metal to constitute the outer force unit EN that acts to attract the fixed side member FB and the support member 3 to each other. That is, the outer force unit EN generates a force that attracts the fixed side member FB and the support member 3 to each other by using the magnetic force (attraction) acting between the magnet 8 fixed to the support member 3 and the bottom plate portion 4D of the lower cover member 4L as the fixed side member FB. In this case, the bottom plate portion 4D of the lower cover member 4L constitutes an outer guide portion EG for guiding the support member 3 to be moved in a direction perpendicular to the optical axis direction, and a portion of the support member 3 (a protruding portion 3S described later) constitutes an outer guided portion EGD guided by the outer guide portion EG. In addition, the magnet 8 includes a rear magnet 8B mounted on the right rear portion of the support member 3 and a front magnet 8F mounted on the left front portion of the support member 3.

[0060] The first magnetic member 9 is an example of a component, and is mounted on the support member 3. The inner force applying unit IN acts as a force applying unit that presses or attracts the lens holding member 2 and the support member 3 to each other. In the example shown in the figure, the first magnetic member 9 is a hexagonal prism (roughly a semi-octagonal prism) magnetized by two poles (see Fig.12 The magnet of the first magnetic component 9 (center figure) cooperates with the second magnetic component 10 to form an inner force unit IN that acts to attract the support component 3 and the lens holding component 2 to each other. That is, the inner force unit IN uses the magnetic force (attractive force) acting between the first magnetic component 9 fixed to the support component 3 and the second magnetic component 10 fixed to the lens holding component 2 to generate a force that attracts the support component 3 and the lens holding component 2 to each other. In addition, the first magnetic component 9 includes a first rear magnetic component 9B installed on the left rear part of the support component 3 and a first front magnetic component 9F installed on the right front part of the support component 3 (refer to Fig.12 central image).

[0061] The second magnetic component 10 is another example of a component constituting the inner force unit IN, and is mounted on the lens holding component 2. In the illustrated example, the second magnetic component 10 is a roughly rectangular parallelepiped magnet that is magnetized with two poles, and cooperates with the first magnetic component 9 to constitute the inner force unit IN. In addition, the second magnetic component 10 is fixed to the lens holding component 2 in a manner that is opposite to the first magnetic component 9 mounted on the support component 3 with a small gap therebetween. In addition, the second magnetic component 10 includes a second rear magnetic component 10B (see Figure 8 ) and the second front magnetic component 10F installed on the right front part of the lens holding component 2.

[0062] The yoke 11 is a component for controlling the path of the magnetic flux generated by the second magnetic component 10, and is mounted on the lens holding component 2 together with the second magnetic component 10. Figure 7 As shown, it has a roughly U-shaped shape covering a portion of the roughly rectangular second magnetic component 10. In addition, the yoke 11 includes a rear yoke 11B installed on the left rear portion of the lens holding component 2 and a front yoke 11F installed on the right front portion of the lens holding component 2. In addition, the yoke 11 can also be omitted.

[0063] In the example shown in the figure, both the first magnetic component 9 and the second magnetic component 10 are magnets, but in order to form the inner force unit IN, at least one of them only needs to be a magnet. This is to generate a magnetic attraction between the first magnetic component 9 and the second magnetic component 10. In addition, in the example shown in the figure, the first magnetic component 9 and the second magnetic component 10 are configured to generate a magnetic attraction between the first magnetic component 9 and the second magnetic component 10, but can also be configured to generate a magnetic repulsion (repulsion force) between the first magnetic component 9 and the second magnetic component 10.

[0064] The conductive component CN is a component for conducting electricity and is formed of a magnetic metal such as iron or a non-magnetic metal such as a copper alloy. Figure 3 As shown, it includes an upper conductive member CU and a lower conductive member CD. The upper conductive member CU is a conductive member embedded in the fixed support member 1. The lower conductive member CD is a conductive member attached to the lower surface of each of the fixed support member 1, the lens holding member 2 and the support member 3.

[0065] Next, refer to Figures 4 to 6 , the fixed support member 1 as the fixed-side member FB will be described in detail. Figure 4 1 is a perspective view of the fixed support member 1 in which the upper conductive member CU is embedded and the fixed metal member 5F and the lower conductive member CD are mounted. Figure 4The upper figure (the figure above the block arrow) is a three-dimensional view of the fixed side metal component 5F, the fixed support component 1, the upper conductive component CU and the lower conductive component CD. Figure 4 The lower figure (below the block arrow) is a three-dimensional view of the fixed support component 1 in which the upper conductive component CU is embedded and the fixed side metal component 5F and the lower conductive component CD are installed. In addition, although the flexible metal component 6 is also installed in the fixed support component 1, Figure 4 In the figure, for the sake of clarity, the illustration of the flexible metal component 6 is omitted. Figure 5 1 is a top view of the fixed support member 1 in which the upper conductive member CU is embedded. Figure 5 The upper figure is a top view of the fixed support member 1 in a state where the fixed side metal member 5F is not installed. Figure 5 The lower figure is a plan view of the fixed support member 1 in a state where the fixed-side metal member 5F is mounted. Figure 6 1 is a bottom view of the fixed support member 1 in which the upper conductive member CU is buried. Specifically, Figure 6 The upper figure is a bottom view of the fixed support member 1 without the flexible metal member 6 and the lower conductive member CD installed. Figure 6 The central figure is a bottom view of the fixed support member 1 with the flexible metal member 6 installed. Figure 6 The lower figure is a bottom view of the fixed support member 1 with the lower conductive member CD also installed. Figure 5 In the figure above, a dot pattern is added to the upper conductive component CU. Figure 5 In the figure below, a dot pattern is added to the fixed side metal part 5F. Figure 6 In the figure above, a dot pattern is added to the upper conductive component CU. Figure 6 In the central figure, a dot pattern is added to the flexible metal part 6. Figure 6 In the figure below, a dot pattern is added to the lower conductive component CD.

[0066] like Figure 4As shown, an upper conductive component CU is embedded in the fixed support component 1 by insert molding. In the present embodiment, the upper conductive component CU includes a first upper conductive component CU1 to a tenth upper conductive component CU10. Specifically, the upper conductive component CU has a joining surface CS exposed on the surface of the fixed support component 1, an external terminal portion TM exposed from the lower portion of the leg portion 1D of the fixed support component 1 and extending downward, and a winding portion RT provided between the joining surface CS and the external terminal portion TM and embedded in the interior of the fixed support component 1. More specifically, the first upper conductive component CU1 to the tenth upper conductive component CU10 respectively have a first joining surface CS1 to a tenth joining surface CS10, a first external terminal portion TM1 to a tenth external terminal portion TM10, and a first winding portion RT1 to a tenth winding portion RT10. In addition, Figure 4 For the sake of clarity, only the tenth upper conductive component CU10 is labeled with its superior reference numerals “CS”, “RT”, and “TM” before reference numerals “CS10”, “RT10”, and “TM10”. In addition, reference numerals “RT1” to “RT9” are omitted.

[0067] The lower conductive member CD is a conductive member attached to the lower surface of the fixed support member 1 , and includes first to fifth lower conductive members CD1 to CD5 .

[0068] In the example shown in the figure, the fixed side metal component 5F is as follows Figure 5 As shown in the figure below, it is fixed to the upper surface of the fixed support member 1. Specifically, on the upper surface of the base 1B of the fixed support member 1, as shown in Figure 5 As shown in the above figure, the first to fourth joining surface portions CS1 to CS4 are exposed.

[0069] More specifically, if Figure 5 As shown, two first through holes 5H1 are formed in the fixed side metal component 5F, through which two cylindrical protrusions 1P formed to protrude upward from the upper surface of the base 1B of the fixed support component 1 are inserted. In the example shown in the figure, the fixed support component 1 and the fixed side metal component 5F are joined by hot caulking or cold caulking the two protrusions 1P inserted into the two first through holes 5H1. However, the joining of the fixed support component 1 and the fixed side metal component 5F can also be achieved by an adhesive.

[0070] In addition, if Figure 5As shown in the following figure, a second through hole 5H2 is formed in the central portion of each fixed side metal component 5F. The second through hole 5H2 is used when each fixed side metal component 5F is joined to the joint surface CS of the upper conductive component CU. In the example shown in the figure, the joining of each fixed side metal component 5F to the upper conductive component CU is achieved by laser welding. However, the joining of each fixed side metal component 5F to the upper conductive component CU can also be achieved by solder or conductive adhesive.

[0071] More specifically, the first to fourth fixed-side terminal plates 5F1 to 5F4 are respectively placed and joined on the base 1B, and are joined to first to fourth joining surface portions CS1 to CS4 exposed on the upper surface of the base 1B by laser welding.

[0072] like Figure 6 As shown in the central figure of the flexible metal member 6, a first through hole 6H1 and a second through hole 6H2 are formed in the first base fixing portion 6N1 and the second base fixing portion 6N2, respectively. The first through hole 6H1 is used when joining the base fixing portion 6N to the fixed support member 1. In the example shown in the figure, the joining of the base fixing portion 6N and the fixed support member 1 is achieved by hot riveting or cold riveting the convex portion 1Q inserted into the first through hole 6H1. In the example shown in the figure, the convex portion 1Q is as shown in FIG. Figure 6 As shown in the above figure, it is a cylindrical part protruding downward from the lower surface of the base 1B of the fixed support member 1. However, the joining of the base fixing portion 6N and the fixed support member 1 can also be achieved by an adhesive. The second through hole 6H2 is used when joining the base fixing portion 6N to the upper conductive member CU buried in the fixed support member 1. In the example shown in the figure, the joining of the base fixing portion 6N and the upper conductive member CU is achieved by laser welding. The joining of the base fixing portion 6N and the upper conductive member CU can also be achieved by solder or a conductive adhesive.

[0073] Specifically, if Figure 6 As shown, the first base fixing portion 6N1 and the second base fixing portion 6N2 are respectively joined to the fixed support member 1 by hot riveting or cold riveting the convex portion 1Q inserted into the first through hole 6H1. In addition, the first base fixing portion 6N1 is joined (welded) to the fifth joint surface portion CS5 of the fifth upper conductive member CU5 by irradiating the second through hole 6H2 with a laser. In addition, the second through hole 6H2 formed in the second base fixing portion 6N2 is not joined to the upper conductive member CU.

[0074] Figure 6As shown in the figure below, the first through hole H1 and the second through hole H2 are formed in the lower conductive component CD (the first lower conductive component CD1 to the fifth lower conductive component CD5). The first through hole H1 is used when joining the lower conductive component CD to the fixed support component 1. In the example shown in the figure, the joining of the lower conductive component CD and the fixed support component 1 is achieved by hot riveting or cold riveting the protrusion 1R inserted into the first through hole H1. In the example shown in the figure, the protrusion 1R is as shown in the figure. Figure 6 As shown in the above figure, it is a cylindrical part formed to protrude downward from the lower surface of the leg 1D of the fixed support member 1. However, the bonding of the lower conductive member CD and the fixed support member 1 can also be achieved by an adhesive. The second through hole H2 is used when bonding the lower conductive member CD to the upper conductive member CU buried in the fixed support member 1. In the example shown in the figure, the bonding of the lower conductive member CD and the upper conductive member CU is achieved by laser welding. The bonding of the lower conductive member CD and the upper conductive member CU can also be achieved by solder or a conductive adhesive.

[0075] Specifically, if Figure 6 As shown, the first lower conductive component CD1 to the fifth lower conductive component CD5 are each joined to the fixed support component 1 by hot riveting or cold riveting the convex portion 1R inserted into the first through hole H1. In addition, the joining (welding) of the first lower conductive component CD1 and the sixth joint surface CS6 of the sixth upper conductive component CU6 is achieved by irradiating the second through hole H2 with a laser. The same is true for the joining (welding) of the second lower conductive component CD2 and the seventh joint surface CS7 of the seventh upper conductive component CU7, the joining (welding) of the third lower conductive component CD3 and the eighth joint surface CS8 of the eighth upper conductive component CU8, the joining (welding) of the fourth lower conductive component CD4 and the ninth joint surface CS9 of the ninth upper conductive component CU9, and the joining (welding) of the fifth lower conductive component CD5 and the tenth joint surface CS10 of the tenth upper conductive component CU10.

[0076] Next, refer to Figure 7 to Figure 9 , the lens holding member 2 as the movable side member MB will be described in detail. Figure 7 1 is a perspective view of the lens holding member 2 to which the lens side metal member 5L, the second magnetic member 10, the yoke 11 and the fifth lower conductive member CD5 are mounted. Specifically, Figure 7 The upper figure (the figure above the block arrow) is a stereoscopic view of the lens holding component 2, the lens side metal component 5L, the second magnetic component 10, the yoke 11 and the fifth lower conductive component CD5. Figure 7The lower figure (the figure below the block arrow) is a three-dimensional view of the lens holding component 2 to which the lens side metal component 5L, the second magnetic component 10, the yoke 11 and the fifth lower conductive component CD5 are installed. Figure 8 2 is a top view of the lens holding component 2. Specifically, Figure 8 The upper figure is a top view of the lens holding component 2 without other components installed. Figure 8 The lower figure is a top view of the lens holding component 2 in a state where the lens side metal component 5L, the second magnetic component 10 and the yoke 11 are mounted. Fig. 9 2 is a bottom view of the lens holding component 2. Specifically, Fig. 9 The upper figure is a bottom view of the lens holding component 2 without other components installed. Fig. 9 The central figure is a bottom view of the lens holding component 2 with the lens side metal component 5L installed. Fig. 9 The lower figure is a bottom view of the lens holding member 2 in a state where the fifth lower conductive member CD5 is also installed. Figure 8 In the figure below, a dot pattern is added to the lens side metal component 5L, the second magnetic component 10 and the yoke 11. Fig. 9 In the central figure, a dot pattern is added to the lens side metal component 5L. Fig. 9 In the lower figure, a dot pattern is added to the lens side metal component 5L and the fifth lower conductive component CD5.

[0077] like Figure 7 As shown, the base portion 2D of the lens holding member 2 is formed with a side surface for mounting the lens side metal member 5L. Figure 8 As shown in the figure below, the first lens side connection plate 5L1 is fixed to the front face of the first mounting portion 2D1, and the second lens side connection plate 5L2 is fixed to the rear face of the second mounting portion 2D2.

[0078] Specifically, the lens holding component 2 and the lens side metal component 5L are respectively joined by applying an adhesive to a convex portion (a convex portion formed on the side of the seat portion 2D) not shown in the figure inserted into the third through hole 5H3. However, the lens holding component 2 and the lens side metal component 5L may be respectively joined by other methods. For example, the lens side metal component 5L may be adhesively fixed to the side of the seat portion 2D where the convex portion is not formed.

[0079] In addition, a recess 2R for accommodating the second magnetic member 10 and the yoke 11 is formed in the base portion 2D of the lens holding member 2. Figure 8As shown in the above figure, the recess 2R includes a first recess 2R1 formed at the right end of the first seat 2D1 for accommodating the second front magnetic component 10F and the front yoke 11F, and a second recess 2R2 formed at the left end of the second seat 2D2 for accommodating the second rear magnetic component 10B and the rear yoke 11B. Moreover, the first recess 2R1 and the second recess 2R2 respectively have a wide portion WP for accommodating the yoke 11 obtained by attaching the adhesive to the second magnetic component 10 and a narrow portion NP for accommodating only the second magnetic component 10. The narrow portion NP of the first recess 2R1 constitutes an anti-drop mechanism for preventing the second front magnetic component 10F and the front yoke 11F pulled to the right by the first front magnetic component 9F from falling off to the right. Likewise, the narrow width portion NP of the second recess 2R2 forms a fall-off prevention mechanism for preventing the second rear magnetic member 10B and the rear yoke 11B pulled to the left by the first rear magnetic member 9B from falling off to the left.

[0080] In addition, if Fig. 9 As shown in the center figure of FIG, a joining surface CT is formed on the lens side metal component 5L. The joining surface CT is used when joining the lens side metal component 5L to the fifth lower conductive component CD5. Specifically, the first lens side connection plate 5L1 has a first joining surface CT1, and the second lens side connection plate 5L2 has a second joining surface CT2.

[0081] In addition, if Fig. 9 As shown in the following figure, the fifth lower conductive component CD5 is formed with a third through hole H3 and a fourth through hole H4. The third through hole H3 is used when the fifth lower conductive component CD5 is joined to the lens holding component 2. In the example shown in the figure, the joining of the fifth lower conductive component CD5 and the lens holding component 2 is achieved by hot riveting or cold riveting the protrusion 2P inserted into the third through hole H3. In the example shown in the figure, the protrusion 2P is as shown in the figure. Fig. 9 As shown in the above figure, it is a cylindrical portion formed to protrude downward from the lower surface of the cylindrical portion 12 of the lens holding member 2. However, the bonding between the fifth lower conductive member CD5 and the lens holding member 2 may be achieved by an adhesive.

[0082] The fourth through hole H4 is used when the fifth lower conductive component CD5 is joined to the lens side metal component 5L. In the example shown in the figure, the joining of the fifth lower conductive component CD5 and the lens side metal component 5L is achieved by laser welding. However, the joining of the fifth lower conductive component CD5 and the lens side metal component 5L can also be achieved by solder or a conductive adhesive.

[0083] Specifically, if Fig. 9As shown, the joining (welding) of the fifth lower conductive component CD5 and the first joining surface CT1 of the first lens side connection plate 5L1 is achieved by irradiating the fourth through hole H4 with laser. The same is true for the joining (welding) of the fifth lower conductive component CD5 and the second joining surface CT2 of the second lens side connection plate 5L2.

[0084] Next, refer to Figure 10 to Figure 12 , the supporting member 3 serving as the movable side member MB will be described in detail. Fig.10 1 is a perspective view of the support member 3 to which the movable side metal member 5M, the support side metal member 5S, the flexible metal member 6, the guide member 7, the magnet 8, the first magnetic member 9 and the lower conductive member CD are mounted. Specifically, Fig.10 The upper figure (the figure above the block arrow) is a three-dimensional diagram of the support component 3, the movable side metal component 5M, the support side metal component 5S, the flexible metal component 6, the guide component 7, the magnet 8, the first magnetic component 9 and the lower conductive component CD. Fig.10 The lower figure (the figure below the block arrow) is a three-dimensional view of the supporting component 3 installed with the movable side metal component 5M, the supporting side metal component 5S, the flexible metal component 6, the guide component 7, the magnet 8, the first magnetic component 9 and the lower side conductive component CD. Fig.11 3 is a top view of the support member 3. Specifically, Fig.11 The upper figure is a top view of the supporting component 3 without other components installed. Fig.11 The central figure is a top view of the support member 3 with the flexible metal member 6 installed. Fig.11 The lower figure is a plan view of the support member 3 in a state where the movable-side metal member 5M, the support-side metal member 5S, and the guide member 7 are also attached. Fig.12 3 is a bottom view of the support member 3. Specifically, Fig.12 The upper figure is a bottom view of the supporting component 3 without other components installed. Fig.12 The central figure is a bottom view of the support member 3 in a state where the support-side metal member 5S, the guide member 7, the magnet 8 and the first magnetic member 9 are installed. Fig.12 The lower figure is a bottom view of the support member 3 with the lower conductive member CD also installed. Fig.11 In the central figure, a dot pattern is added to the flexible metal part 6. Fig.11 In the figure below, a dot pattern is added to the movable side metal component 5M, the supporting side metal component 5S and the guide component 7. Fig.12 In the central figure, a dot pattern is added to the support side metal component 5S, the guide component 7, the magnet 8 and the first magnetic component 9. Fig.12 In the figure below, a dot pattern is added to the lower conductive component CD.

[0085] like Fig.11 As shown in the central figure of the flexible metal component 6, the third support fixing portion 6E3 in the support fixing portion 6E of the flexible metal component 6 is formed with a third through hole 6H3. The third through hole 6H3 is used when the third support fixing portion 6E3 is joined to the support component 3. In the example shown in the figure, the joining of the third support fixing portion 6E3 to the support component 3 is achieved by hot riveting or cold riveting the convex portion 3Q inserted into the third through hole 6H3. In the example shown in the figure, the convex portion 3Q is as shown in FIG. Fig.11 As shown in the above figure, it is a cylindrical part formed to protrude upward from the upper surface of the support member 3. However, the joining of the third support fixing portion 6E3 and the support member 3 can also be achieved by an adhesive.

[0086] like Fig.11 As shown in the center figure, the first support fixing portion 6E1 and the second support fixing portion 6E2 of the support fixing portion 6E of the flexible metal member 6 are respectively formed with two first through holes 6H1 through which two cylindrical protrusions 3P formed to protrude upward from the upper surface of the support member 3 are inserted. Fig.11 As shown in the following figure, two first through holes 5H1 for inserting two protrusions 3P are formed in the movable side metal component 5M. In the example shown in the figure, the support component 3, the movable side metal component 5M and the support fixing portion 6E are joined by hot riveting or cold riveting the protrusions 3P inserted in the first through holes 5H1 and the first through holes 6H1, respectively. However, the joining of the support component 3, the movable side metal component 5M and the support fixing portion 6E may also be achieved by an adhesive.

[0087] Specifically, if Fig.11 As shown, the first support fixing portion 6E1 and the first movable side terminal plate 5M1, and the second movable side terminal plate 5M2 and the support member 3 are joined by hot riveting or cold riveting the convex portion 3P inserted through the first through hole 5H1 and the first through hole 6H1, respectively. Similarly, the second support fixing portion 6E2 and the third movable side terminal plate 5M3, and the fourth movable side terminal plate 5M4 and the support member 3 are joined by hot riveting or cold riveting the convex portion 3P inserted through the first through hole 5H1 and the first through hole 6H1, respectively.

[0088] In addition, if Fig.11As shown in the following figure, a second through hole 5H2 is formed in the central portion of each movable side metal component 5M. The second through hole 5H2 is used when the movable side metal component 5M is joined to the support fixing portion 6E of the flexible metal component 6. In the example shown in the figure, the joining (laser welding) of the movable side metal component 5M and the support fixing portion 6E is achieved by irradiating the second through hole 5H2 with a laser. However, the joining (laser welding) of the movable side metal component 5M and the support fixing portion 6E can also be achieved by solder or a conductive adhesive.

[0089] More specifically, the first movable side connection plate 5M1 and the second movable side connection plate 5M2 are joined (laser welded) to the first support fixing portion 6E1 by irradiating the second through hole 5H2 with laser light. The same is true for the third movable side connection plate 5M3 and the fourth movable side connection plate 5M4 and the second support fixing portion 6E2.

[0090] In addition, if Fig.12 As shown in the figure above, a groove 3T for accommodating the guide member 7, a recess 3U for accommodating the magnet 8, and a recess 3W for accommodating the first magnetic member 9 are formed on the lower surface of the support member 3. Fig.12 As shown in the above figure, the groove portion 3T includes a first groove portion 3T1 formed at the right front portion of the supporting member 3 for accommodating the front guide member 7F and a second groove portion 3T2 formed at the left rear portion of the supporting member 3 for accommodating the rear guide member 7B. In addition, the recess 3U includes a first recess 3U1 formed at the left front portion of the supporting member 3 for accommodating the front magnet 8F and a second recess 3U2 formed at the right rear portion of the supporting member 3 for accommodating the rear magnet 8B. In addition, the recess 3W includes a first recess 3W1 formed at the right front portion of the supporting member 3 for accommodating the first front magnetic member 9F and a second recess 3W2 formed at the left rear portion of the supporting member 3 for accommodating the first rear magnetic member 9B. Moreover, the first recess 3W1 and the second recess 3W2 respectively have a wide portion WP and a narrow portion NP for accommodating the first magnetic member 9 of a hexagonal prism shape (approximately a semi-octagonal prism shape). The narrow portion NP of the first recess 3W1 constitutes a portion that prevents the second front magnetic member 10F (refer to Figure 8 Similarly, the narrow width portion NP of the second recess 3W2 constitutes a mechanism to prevent the second rear magnetic component 10B (see the figure below) from falling off. Figure 8 The first rear magnetic component 9B is pulled to the right to prevent it from falling off to the right. In addition, the guide component 7, the magnet 8 and the first magnetic component 9 are fixed to the support component 3 using an adhesive.

[0091] In addition, if Fig.12As shown in the figure below, the lower conductive component CD is formed with a fifth through hole H5 and a sixth through hole H6. The fifth through hole H5 is used when the lower conductive component CD is joined to the support component 3. In the example shown in the figure, the joining of the lower conductive component CD and the support component 3 is achieved by hot riveting or cold riveting the convex portion 3R inserted into the fifth through hole H5. In the example shown in the figure, the convex portion 3R is as shown in FIG. Fig.12 As shown in the upper figure of FIG. , it is a cylindrical portion formed to protrude downward from the lower surface of the support member 3. However, the bonding between the lower conductive member CD and the support member 3 may also be achieved by an adhesive.

[0092] The sixth through hole H6 is used when joining the lower conductive component CD to the support side metal component 5S. In the example shown in the figure, the joining (laser welding) of the lower conductive component CD and the support side metal component 5S is achieved by irradiating the sixth through hole H6 with laser. However, the joining of the lower conductive component CD and the support side metal component 5S can also be achieved by solder or a conductive adhesive.

[0093] Specifically, if Fig.12 As shown, the joining (welding) of the first lower conductive component CD1 and the first support-side connection plate 5S1 is achieved by irradiating the sixth through hole H6 with laser. The same is true for the joining (welding) of the second lower conductive component CD2 and the second support-side connection plate 5S2, the joining (welding) of the third lower conductive component CD3 and the third support-side connection plate 5S3, and the joining (welding) of the fourth lower conductive component CD4 and the fourth support-side connection plate 5S4.

[0094] Next, refer to Fig.13 , the upper shape memory alloy wire SAU attached to the metal member 5 will be described. Fig.13 1 is a diagram showing an example of arrangement of the first movable-side terminal plate 5M1, the first fixed-side terminal plate 5F1, and the first upper wire SAU1. Specifically, Fig.13 The upper figure is a diagram showing the first upper wire SAU1 respectively mounted on the first movable side terminal block 5M1 and the first fixed side terminal block 5F1 as viewed from the upper side (Z1 side). Fig.13 The lower figure is a diagram of the first upper wire SAU1 respectively attached to the first movable side terminal board 5M1 and the first fixed side terminal board 5F1 as viewed from the front side (X1 side). Fig.13 The positional relationship of the components shown corresponds to the positional relationship in the following state: the lens driving device 101 is assembled and current is supplied to the upper shape memory alloy wire SAU. Fig.13 For the sake of clarity, illustrations of other components are omitted. Fig.13The following description is related to the first upper line SAU1, but is also applicable to the second upper line SAU2 to the fourth upper line SAU4.

[0095] Specifically, one end of the first upper wire SAU1 is fixed to the first fixed-side terminal plate 5F1 at the holding portion J1 of the first fixed-side terminal plate 5F1, and the other end of the first upper wire SAU1 is fixed to the first movable-side terminal plate 5M1 at the holding portion J2 of the first movable-side terminal plate 5M1.

[0096] The holding portion J1 is formed by bending a portion of the first fixed-side connection plate 5F1. Specifically, the holding portion J1 is formed by bending a portion of the first fixed-side connection plate 5F1 while clamping the end portion (one end) of the first upper wire SAU1. The end portion (one end) of the first upper wire SAU1 is fixed to the holding portion J1 by welding. The same is true for the holding portion J2.

[0097] Thus, one end of the first upper wire SAU1 to the fourth upper wire SAU4 is fixed to the first fixed side connection board 5F1 to the fourth fixed side connection board 5F4, respectively, and the other end of the first upper wire SAU1 to the fourth upper wire SAU4 is fixed to the first movable side connection board 5M1 to the fourth movable side connection board 5M4, respectively. Moreover, the fixed support member 1 to which the first fixed side connection board 5F1 to the fourth fixed side connection board 5F4 is mounted is configured to function as a wire support member, and the support member 3 to which the first movable side connection board 5M1 to the fourth movable side connection board 5M4 is mounted is configured to function as a movable side member MB. According to this configuration, the support member 3 is supported by the first upper wire SAU1 to the fourth upper wire SAU4 and the fixed support member 1 in a state where it can move at least in the direction perpendicular to the optical axis OA, that is, the X-axis direction and the Y-axis direction.

[0098] Next, refer to Fig.14 , the lower shape memory alloy wire SAD attached to the metal member 5 will be described. Fig.14 : is a diagram showing an example of arrangement of the first lens side connection plate 5L1, the first support side connection plate 5S1, the second support side connection plate 5S2, the first lower wire SAD1, and the second lower wire SAD2. Specifically, Fig.14 The upper figure is a diagram when the first lower wire SAD1 respectively installed on the first lens side connection plate 5L1 and the first support side connection plate 5S1, and the second lower wire SAD2 respectively installed on the first lens side connection plate 5L1 and the second support side connection plate 5S2 are viewed from the upper side (Z1 side), Fig.14The figure below is a diagram of the first lower wire SAD1 respectively installed on the first lens side connection plate 5L1 and the first support side connection plate 5S1, and the second lower wire SAD2 respectively installed on the first lens side connection plate 5L1 and the second support side connection plate 5S2 when viewed from the front side (X1 side). In addition, Fig.14 The positional relationship of the components shown corresponds to the positional relationship in the following state: the lens driving device 101 is assembled and current is supplied to the lower shape memory alloy wire SAD. Fig.14 For the sake of clarity, illustrations of other components are omitted. Fig.14 The following description is related to the combination of the first lower line SAD1 and the second lower line SAD2, but is also applicable to the combination of the third lower line SAD3 and the fourth lower line SAD4.

[0099] Specifically, one end of the first lower wire SAD1 is fixed to the first support side wiring board 5S1 at the holding portion J11 of the first support side wiring board 5S1, and the other end of the first lower wire SAD1 is fixed to the upper end portion of the first lens side wiring board 5L1 at the holding portion J12 of the first lens side wiring board 5L1. In addition, one end of the second lower wire SAD2 is fixed to the second support side wiring board 5S2 at the holding portion J13 of the second support side wiring board 5S2, and the other end of the second lower wire SAD2 is fixed to the lower end portion of the first lens side wiring board 5L1 at the holding portion J14 of the first lens side wiring board 5L1.

[0100] The holding portion J11 is formed by bending a portion of the first support side connection plate 5S1. Specifically, the holding portion J11 is formed by bending a portion of the first support side connection plate 5S1 while clamping the end (one end) of the first lower wire SAD1. The end (one end) of the first lower wire SAD1 is fixed to the holding portion J11 by welding. The same is true for the holding portions J12 to J14.

[0101] In this way, one end of the first lower wire SAD1 to the fourth lower wire SAD4 is fixed to the first support side connection plate 5S1 to the fourth support side connection plate 5S4, respectively, the other end of each of the first lower wire SAD1 and the second lower wire SAD2 is fixed to the first lens side connection plate 5L1, and the other end of each of the third lower wire SAD3 and the fourth lower wire SAD4 is fixed to the second lens side connection plate 5L2. In addition, the support member 3 to which the first support side connection plate 5S1 to the fourth support side connection plate 5S4 is mounted is configured to function as a wire support member, and the lens holding member 2 to which the first lens side connection plate 5L1 and the second lens side connection plate 5L2 are mounted is configured to function as a movable side member MB. According to this configuration, the lens holding member 2 is supported by the first lower wire SAD1 to the fourth lower wire SAD4 and the support member 3 in a state where it can move at least in the direction parallel to the optical axis OA, that is, in the Z-axis direction. In addition, the support side metal component 5S is formed with a third through hole 5H3 used when the support side metal component 5S is fixed to the side surface of the support component 3, similarly to the lens side metal component 5L. The adhesive for bonding the support component 3 and the support side metal component 5S can also be applied through the third through hole 5H3.

[0102] Next, refer to Fig.15 , the positional relationship among the fixed-side metal component 5F, the movable-side metal component 5M, the upper shape memory alloy wire SAU, and the lens holding component 2 will be described. Fig.15 FIG. 2 is a top view of the fixed-side metal component 5F, the movable-side metal component 5M, the upper shape memory alloy wire SAU, and the lens holding component 2. Fig.15 In the figure, a dot pattern is added to the lens holding component 2 for clarity.

[0103] like Fig.15 As shown, the upper shape memory alloy wire SAU includes: a first upper wire SAU1 to a fourth upper wire SAU4 which are arranged to surround the cylindrical portion 12 of the lens holding component 2 when viewed from above along the optical axis direction. One end of the first upper wire SAU1 is fixed to the first fixed side terminal plate 5F1, and the other end is fixed to the first movable side terminal plate 5M1. Similarly, one end of the second upper wire SAU2 is fixed to the second fixed side terminal plate 5F2, and the other end is fixed to the second movable side terminal plate 5M2. In addition, one end of the third upper wire SAU3 is fixed to the third fixed side terminal plate 5F3, and the other end is fixed to the third movable side terminal plate 5M3. In addition, one end of the fourth upper wire SAU4 is fixed to the fourth fixed side terminal plate 5F4, and the other end is fixed to the fourth movable side terminal plate 5M4.

[0104] In this way, the upper shape memory alloy wire SAU is supported by four fixed side metal parts 5F and four movable side metal parts 5M. From another point of view, the upper shape memory alloy wire SAU is supported by four first shape metal parts 5A and four second shape metal parts 5B. The four first shape metal parts 5A are the same parts having the same shape, and include the first fixed side connection plate 5F1, the second movable side connection plate 5M2, the third fixed side connection plate 5F3, and the fourth movable side connection plate 5M4. Similarly, the four second shape metal parts 5B are the same parts having the same shape, and include the first movable side connection plate 5M1, the second fixed side connection plate 5F2, the third movable side connection plate 5M3, and the fourth fixed side connection plate 5F4.

[0105] The adjacent first shape metal parts 5A and second shape metal parts 5B are as follows: Fig.15 As shown, it has a shape that is line-symmetrical about a dotted line intersecting the optical axis OA. Furthermore, the first upper line SAU1 to the fourth upper line SAU4 are provided between one of the four first-shaped metal parts 5A and one of the four second-shaped metal parts 5B, respectively.

[0106] Next, refer to Fig.16 , the path of the current flowing through the upper shape memory alloy wire SAU is described. Fig.16 It is a three-dimensional diagram of the metal component 5 (the first fixed side terminal board 5F1 to the fourth fixed side terminal board 5F4 and the first movable side terminal board 5M1 to the fourth movable side terminal board 5M4), the flexible metal component 6, the upper conductive component CU (the first upper conductive component CU1 to the fifth upper conductive component CU5), and the upper shape memory alloy wire SAU (the first upper wire SAU1 to the fourth upper wire SAU4), showing the positional relationship among the metal component 5, the flexible metal component 6, the upper conductive component CU and the upper shape memory alloy wire SAU.

[0107] Specifically, if the first upper conductive component CU1 is connected to a high potential and the fifth upper conductive component CU5 is connected to a low potential, the current flows to the fifth upper conductive component CU5 through the first upper conductive component CU1, the first fixed side terminal board 5F1, the first upper wire SAU1, the first movable side terminal board 5M1, and the flexible metal component 6 (the first supporting fixing part 6E1, the third supporting fixing part 6E3, the first flexible arm part 6G1 and the first base fixing part 6N1).

[0108] In addition, if the second upper conductive component CU2 is connected to a high potential and the fifth upper conductive component CU5 is connected to a low potential, the current flows to the fifth upper conductive component CU5 through the second upper conductive component CU2, the second fixed side terminal board 5F2, the second upper line SAU2, the second movable side terminal board 5M2, and the flexible metal component 6 (the first supporting fixing part 6E1, the third supporting fixing part 6E3, the first flexible arm part 6G1 and the first base fixing part 6N1).

[0109] In addition, if the third upper conductive component CU3 is connected to a high potential and the fifth upper conductive component CU5 is connected to a low potential, the current flows to the fifth upper conductive component CU5 through the third upper conductive component CU3, the third fixed side terminal block 5F3, the third upper wire SAU3, the third movable side terminal block 5M3, and the flexible metal component 6 (the second supporting fixing portion 6E2, the third supporting fixing portion 6E3, the first flexible arm portion 6G1, and the first base fixing portion 6N1).

[0110] In addition, if the fourth upper conductive component CU4 is connected to a high potential and the fifth upper conductive component CU5 is connected to a low potential, the current flows to the fifth upper conductive component CU5 through the fourth upper conductive component CU4, the fourth fixed side terminal board 5F4, the fourth upper line SAU4, the fourth movable side terminal board 5M4, and the flexible metal component 6 (the second supporting fixing part 6E2, the third supporting fixing part 6E3, the first flexible arm part 6G1 and the first base fixing part 6N1).

[0111] The control device not shown in the figure located outside the lens driving device 101 as described above can control the contraction of each of the first upper wire SAU1 to the fourth upper wire SAU4 individually by controlling the voltage applied to the first upper conductive component CU1 to the fifth upper conductive component CU5, for example, and controlling the current flowing through the first upper wire SAU1 to the fourth upper wire SAU4. In addition, the control device can also be configured in the lens driving device 101. In addition, the control device can also be a component of the lens driving device 101.

[0112] The control device may, for example, utilize the driving force in the direction perpendicular to the optical axis OA caused by the contraction of the upper shape memory alloy wire SAU as the second driving unit DM2 to move the lens holding member 2 in the direction perpendicular to the optical axis OA on the Z1 side (the photographed object side) of the imaging element IS. Furthermore, the control device may also realize the hand shake correction function as one of the lens adjustment functions by moving the lens holding member 2 in this way.

[0113] Next, refer to Figures 17 to 21 , the path of the current flowing through the lower shape memory alloy wire SAD is described. Fig.17It is a three-dimensional diagram of the metal component 5 (the first support side terminal plate 5S1 to the fourth support side terminal plate 5S4, the first lens side terminal plate 5L1 and the second lens side terminal plate 5L2), the upper conductive component CU (the sixth upper conductive component CU6 to the tenth upper conductive component CU10), the lower conductive component CD, and the lower shape memory alloy wire SAD (the first lower wire SAD1 to the fourth lower wire SAD4), showing the positional relationship of the metal component 5, the upper conductive component CU, the lower conductive component CD and the lower shape memory alloy wire SAD. Figure 18 to Figure 21 They are Fig.17 Specifically, Fig.18 is a perspective view of a portion related to the first lower line SAD1, Fig.19 is a perspective view of a portion related to the second lower line SAD2, Fig. 20 is a three-dimensional diagram of a portion related to the third lower line SAD3, Fig.21 It is a perspective view of a portion related to the fourth lower line SAD4.

[0114] Specifically, Fig.18 FIG. 2 shows an example of a path of a current flowing through the first lower line SAD1 when the sixth upper conductive component CU6 is connected to a high potential and the tenth upper conductive component CU10 is connected to a low potential. If the sixth upper conductive component CU6 is connected to a high potential and the tenth upper conductive component CU10 is connected to a low potential, the current is as follows: Fig.18 As shown by the arrow, it flows to the tenth upper conductive component CU10 through the sixth upper conductive component CU6, the first lower conductive component CD1, the first support side connection plate 5S1, the first lower wire SAD1, the first lens side connection plate 5L1 and the fifth lower conductive component CD5.

[0115] in addition, Fig.19 FIG. 2 shows an example of a path of a current flowing through the second lower line SAD2 when the seventh upper conductive component CU7 is connected to a high potential and the tenth upper conductive component CU10 is connected to a low potential. If the seventh upper conductive component CU7 is connected to a high potential and the tenth upper conductive component CU10 is connected to a low potential, the current is as follows: Fig.19 As shown by the arrow, it flows to the tenth upper conductive component CU10 through the seventh upper conductive component CU7, the second lower conductive component CD2, the second support side connection plate 5S2, the second lower wire SAD2, the first lens side connection plate 5L1 and the fifth lower conductive component CD5.

[0116] in addition, Fig. 20FIG. 2 shows an example of a path of a current flowing through the third lower line SAD3 when the eighth upper conductive component CU8 is connected to a high potential and the tenth upper conductive component CU10 is connected to a low potential. If the eighth upper conductive component CU8 is connected to a high potential and the tenth upper conductive component CU10 is connected to a low potential, the current is as follows: Fig. 20 As shown by the arrow, it flows to the tenth upper conductive component CU10 through the eighth upper conductive component CU8, the third lower conductive component CD3, the third support side connection plate 5S3, the third lower line SAD3, the second lens side connection plate 5L2 and the fifth lower conductive component CD5.

[0117] in addition, Fig.21 FIG. 2 shows an example of a path of a current flowing through the fourth lower line SAD4 when the ninth upper conductive component CU9 is connected to a high potential and the tenth upper conductive component CU10 is connected to a low potential. If the ninth upper conductive component CU9 is connected to a high potential and the tenth upper conductive component CU10 is connected to a low potential, the current is as follows: Fig.21 As shown by the arrow, it flows to the tenth upper conductive component CU10 through the ninth upper conductive component CU9, the fourth lower conductive component CD4, the fourth support side connection plate 5S4, the fourth lower line SAD4, the second lens side connection plate 5L2 and the fifth lower conductive component CD5.

[0118] The control device can independently control the contraction of each of the first to fourth lower wires SAD1 to SAD4 by controlling the voltages applied to the sixth to tenth upper conductive members CU6 to CU10 to control the currents flowing through the first to fourth lower wires SAD1 to SAD4, for example.

[0119] The control device may, for example, utilize the driving force in the direction parallel to the optical axis OA caused by the contraction of the lower shape memory alloy wire SAD as the first driving unit DM1 to move the lens holding component 2 in the direction parallel to the optical axis OA on the Z1 side (subject side) of the imaging element IS. Then, by moving the lens holding component 2 in this way, the control device may realize an automatic focus adjustment function as one of the lens adjustment functions. Specifically, the control device may move the lens holding component 2 in the direction away from the imaging element IS so as to enable macro photography, and may move the lens holding component 2 in the direction close to the imaging element IS so as to enable infinite photography.

[0120] Furthermore, the control device may be configured to detect the length (contraction amount) of the shape memory alloy wire SA based on the output of a sensor that detects the resistance value of the shape memory alloy wire SA, thereby being able to feedback control the current flowing through the shape memory alloy wire SA.

[0121] Next, refer to Fig. 22 as well as Fig.23 The relationship between the inner guide portion IG and the force applying unit IN, which is a force applying unit that applies a force to press or attract the lens holding member 2 and the supporting member 3 to each other, and the inner guided portion IGD guided by the inner guide portion IG will be described.

[0122] Fig. 22 1 is a layout diagram of the lens holding member 2, the support side metal member 5S, the lens side metal member 5L, the guide member 7, the first magnetic member 9, the second magnetic member 10, the yoke 11, and the lower side shape memory alloy wire SAD. Specifically, Fig. 22 The upper figure is a top view of the lens holding component 2, the support side metal component 5S, the lens side metal component 5L, the guide component 7, the first magnetic component 9, the second magnetic component 10, the yoke 11 and the lower side shape memory alloy wire SAD, Fig. 22 The figure below is a front view of the support side metal component 5S, the lens side metal component 5L, the front guide component 7F, the first front side magnetic component 9F, the second front side magnetic component 10F, the front side yoke 11F, the first lower side wire SAD1 and the second lower side wire SAD2. Fig. 22 In the figure, for the sake of clarity, dot patterns are added to the guide member 7, the first magnetic member 9, the second magnetic member 10, and the yoke 11.

[0123] Fig.23 It is a front view of the lens holding member 2, the supporting member 3, the supporting side metal member 5S, the lens side metal member 5L, the guide member 7, the first magnetic member 9, the second magnetic member 10 and the lower side shape memory alloy wire SAD. Specifically, Fig.23 The figure above shows an example of the configuration of the inner force applying unit IN in the lens driving device 101 according to the above-mentioned embodiment. Fig.23 The following figure shows another configuration example of the inner force applying unit IN. More specifically, Fig.23 The inner force applying unit IN in the above figure is configured to utilize the magnetic attraction acting between the first magnetic component 9 and the second magnetic component 10. Fig.23 The inner force applying unit IN in the figure below is configured to utilize the magnetic repulsion between the first magnetic component 9 and the second magnetic component 10. Fig.23 In the figure, for the sake of clarity, dot patterns are added to the lens holding member 2, the supporting member 3, and the guiding member 7, and cross patterns and oblique line patterns are added to the N-pole portion and S-pole portion of the first magnetic member 9 and the second magnetic member 10, which are magnets, respectively. Fig.23 In FIG. 1 , each component is schematically represented, and the direction and magnitude of the force acting on each component are represented by arrows. Fig.23For convenience, the Z-axis direction corresponds to the vertical direction, and the Y-axis direction corresponds to the horizontal direction.

[0124] Specifically, Fig.23 The block arrows in the upper figure show that the lens holding member 2 moves downward when the contraction force F1 of the first lower line SAD1 is greater than the contraction force F2 of the second lower line SAD2.

[0125] More specifically, Fig.23 The upper figure shows that the contraction force F1 of the first lower line SAD1 is decomposed into a downward vertical component F1z and a leftward horizontal component F1x, and the contraction force F2 of the second lower line SAD2 is decomposed into an upward vertical component F2z and a leftward horizontal component F2x. Fig.23 The figure above shows that the lens holding member 2 to which the second front magnetic member 10F is fixed is pulled to the right by the magnetic attraction F3 acting between the first front magnetic member 9F and the second front magnetic member 10F. Fig.23 The above figure shows a situation where a rightward contact force Fx acts between the front groove 2VF of the lens holding component 2 pulled to the right and the front guide component 7F. The contact force Fx is equivalent to the resultant force of the leftward horizontal component F1x of the contraction force F1, the leftward horizontal component F2x of the contraction force F2, and the rightward gravitational force F3. The static friction force μFx is a force derived by multiplying the static friction coefficient μ between the front groove 2VF and the front guide component 7F by the contact force Fx. If the magnitude of the driving force Fz generated by the first driving part DM1 (lower shape memory alloy wire SAD) exceeds the magnitude of the static friction force μFx, the lens holding component 2 moves in the vertical direction (Z-axis direction). The driving force Fz is equivalent to the resultant force of the downward vertical component F1z of the contraction force F1 and the upward vertical component F2z of the contraction force F2. Fig.23 The figure above shows a situation where the downward driving force Fz exceeds the static friction force μFx and the lens holding member 2 moves downward. The force application method when the lens holding member 2 moves upward is the same as the force application method when the lens holding member 2 moves downward, except that the contraction force F1 is smaller than the contraction force F2.

[0126] The same also applies to the case where the magnetic repulsion acting between the first magnetic member 9 and the second magnetic member 10 is utilized. Fig.23 The block arrows in the figure below show that the lens holding member 2 moves downward when the contraction force F1 of the first lower line SAD1 is greater than the contraction force F2 of the second lower line SAD2. More specifically, Fig.23The figure below shows that the lens holding component 2 fixed with the second front magnetic component 10F is pushed to the right by the magnetic repulsion F4 acting between the first front magnetic component 9F and the second front magnetic component 10F. The contraction force F1, contraction force F2, contact force Fx and driving force Fz are applied in the same way as Fig.23 The same situation as in the above figure.

[0127] According to the above-mentioned structure, the control device allows the current to flow through the first lower line SAD1 to the fourth lower line SAD4 separately and controls the contraction of each of the first lower line SAD1 to the fourth lower line SAD4 separately, so that the lens holding component 2 can be moved along the Z-axis direction. In addition, this structure can bring about the effect of maintaining the position of the lens holding component 2 in the Z-axis direction even when the current supply to each of the first lower line SAD1 to the fourth lower line SAD4 is interrupted and the driving force Fz (contraction force F1 and contraction force F2) disappears. This is because, compared to before the driving force Fz disappears, the contact force Fx increases by the amount by which the horizontal component F1x of the contraction force F1 and the horizontal component F2x of the contraction force F2 disappear, and the contact force Fx is approximately equal to the gravitational force F3. That is, this is because the front groove 2VF of the lens holding member 2 pulled rightward by the attractive force F3 is pressed against the front guide member 7F to generate a contact force Fx, and the static friction force μFx based on the contact force Fx is larger than the drive force Fz (=0) generated by the first drive unit DM1.

[0128] Next, refer to Fig.24 as well as Fig.25 , the relationship between the outer guiding portion EG, the outer guided portion EGD and the outer force applying unit EN will be described. Fig.24 FIG. 1 is a bottom view of the support member 3 to which the magnet 8 constituting the outer force applying unit EN is mounted. Fig.24 For the sake of clarity, the recess 3U (refer to Fig.12 ) and a magnet 8 fixed with an adhesive or the like is attached with a dot pattern.

[0129] like Fig.24 As shown, a protrusion 3S protruding downward is formed on the lower surface of the support member 3. In the example shown in the figure, the protrusion 3S is a portion constituting the outer guided portion EGD guided by the bottom plate portion 4D of the lower cover member 4L functioning as the outer guide portion EG, and includes a first protrusion 3S1 to a fourth protrusion 3S4.

[0130] Specifically, the first protrusion 3S1 to the fourth protrusion 3S4 have the same protrusion amount, respectively, and are configured to be able to contact the bottom plate portion 4D of the lower cover member 4L at the same time and slide on the bottom plate portion 4D. In addition, the first protrusion 3S1 to the fourth protrusion 3S4 are respectively configured to correspond to one of the four corners of the support member 3. In addition, the first protrusion 3S1 to the fourth protrusion 3S4 are respectively configured to be at equal distances from the optical axis OA. However, the number of protrusions 3S may be three or more than five. In addition, as long as they can contact the bottom plate portion 4D at the same time, the protrusion amounts of the first protrusion 3S1 to the fourth protrusion 3S4 may be different from each other. In addition, the first protrusion 3S1 to the fourth protrusion 3S4 may also be respectively configured to be at different distances from the optical axis OA.

[0131] In addition, if Fig.25 As shown, the support member 3 is configured such that the magnet 8 is disposed at a predetermined distance away from the bottom plate portion 4D in a state where the bottom plate portion 4D of the lower cover member 4L is in contact with the protrusion 3S.

[0132] Fig.25 4 is a perspective cross-sectional view of the lower cover member 4L that accommodates the support member 3. Specifically, Fig.25 The top figure is a cross-sectional view including the third protrusion 3S3 and the fourth protrusion 3S4. Fig.25 The second figure from the top is a cross-sectional view including the first protrusion 3S1 and the front magnet 8F. Fig.25 The third figure from the top is a cross-sectional view including the third protrusion 3S3 and the rear magnet 8B. Fig.25 The bottom figure is a cross-sectional view including the first protrusion 3S1 and the second protrusion 3S2.

[0133] More specifically, the support member 3 is as follows Fig.25 As shown in the second figure from the top, the bottom plate 4D and the front magnet 8F are arranged at a distance GP1 apart, and as Fig.25 As shown in the third figure from the top, the bottom plate portion 4D and the rear magnet 8B are arranged to be separated by a distance GP2.

[0134] In the example shown in the figure, the support member 3 is configured so that the distance GP1 and the distance GP2 are the same, but the distance GP1 and the distance GP2 may be configured to be different from each other. In addition, the number of magnets 8 may be one or three or more.

[0135] According to this configuration, the magnet 8 constituting the outer force applying unit EN and the bottom plate 4D of the lower cover member 4L can move the support member 3 relative to the lower cover member 4L in a direction perpendicular to the optical axis direction while the support member 3 is in contact with the lower cover member 4L. This is because the support member 3 is attracted to the bottom plate 4D side of the lower cover member 4L by the magnetic force of the magnet 8 mounted on the support member 3.

[0136] As described above, the lens driving device 101 according to the embodiment of the present disclosure is Figure 3 As shown, it comprises: a supporting member 3; a lens holding member 2 having a cylindrical portion 12 capable of arranging a lens body LS and capable of moving in the optical axis direction relative to the supporting member 3; and a plurality of shape memory alloy wires SA (lower shape memory alloy wires SAD) disposed between the supporting member 3 and the lens holding member 2, so that the lens holding member 2 moves in the optical axis direction. The supporting member 3 comprises an inner guide portion IG (guide member 7) for guiding the movement of the lens holding member 2 in the optical axis direction and a first magnetic member 9. The lens holding member 2 comprises an inner guided portion IGD (groove portion 2V) that slides with the inner guide portion IG (guide member 7) and is guided by the inner guide portion IG (guide member 7), and a second magnetic member 10 that is disposed at a position separated from the first magnetic member 9 in a direction intersecting the optical axis direction. The first magnetic component 9 and the second magnetic component 10 are configured such that at least one of them is composed of a magnet, and a magnetic force is generated between the first magnetic component 9 and the second magnetic component 10, so that a force acts in a direction intersecting the optical axis direction to press the inner guide portion IG (guide component 7) and the inner guided portion IGD (groove portion 2V) against each other. Regardless of the position of the lens holding component 2 in the optical axis direction, the inner guide portion IG (guide component 7) and the inner guided portion IGD (groove portion 2V) are in contact.

[0137] According to this configuration, the lens driving device 101 can achieve power saving. This is because a contact force (friction force) acts between the supporting member 3 (inner guide portion IG (guide member 7)) and the lens holding member 2 (inner guided portion IGD (groove portion 2V)), so the lens driving device 101 can maintain the position of the lens holding member 2 even if no current flows through the shape memory alloy wire SA (lower shape memory alloy wire SAD) or a small amount of current flows through it.

[0138] Alternatively, the shape memory alloy wire SA (lower shape memory alloy wire SAD) may be as follows: Fig.23As shown in the above figure, compared with the case where no current flows through the shape memory alloy wire SA (lower shape memory alloy wire SAD), when current flows through the shape memory alloy wire SA (lower shape memory alloy wire SAD), it contracts in a manner that reduces the force (friction force) of the mutual pressing between the inner guide portion IG (guide component 7) and the inner guided portion IGD (groove portion 2V).

[0139] According to this configuration, the lens driving device 101 can reduce the contact force (friction force) between the inner guide portion IG (guide portion 7) and the inner guided portion IGD (groove portion 2V) when the lens holding component 2 moves in the optical axis direction, thereby increasing the contact force (friction force) when no power is supplied and making it easier to maintain the position of the lens holding component 2.

[0140] In addition, the shape memory alloy wire SA (lower shape memory alloy wire SAD) is as follows Fig.23 As shown in the above figure, it may also include: a first wire (first lower wire SAD1), one end of which is supported by the support member 3 and is arranged at a position lower than the other end supported by the lens holding member 2 in the optical axis direction; and a second wire (second lower wire SAD2), one end of which is supported by the support member 3 and is arranged at a position higher than the other end supported by the lens holding member 2 in the optical axis direction. In this case, the first wire (first lower wire SAD1) and the second wire (second lower wire SAD2) may each have one end fixed to the first metal member (support side metal member 5S) provided on the support member 3, and the other end fixed to the second metal member (lens side metal member 5L) provided on the lens holding member 2. Moreover, the first line (first lower line SAD1) and the second line (second lower line SAD2) can also be configured respectively so that in the direction intersecting the optical axis direction (Y-axis direction), the position where one end is fixed to the first metal part (support side metal part 5S) is farther away from the inner guide part IG (guide part 7) than the position where the other end is fixed to the second metal part (lens side metal part 5L).

[0141] According to this configuration, the lens driving device 101 can easily move the lens holding member 2 up and down by using the first lower line SAD1 and the second lower line SAD2. In addition, the lens driving device 101 can effectively reduce the contact force (friction force) between the inner guide portion IG (guide member 7) and the inner guided portion IGD (groove portion 2V) when powered on.

[0142] In addition, the second magnetic member 10 and the inner guided portion IGD (groove portion 2V) may also be as follows. Fig. 22As shown in the above figure, it is arranged at adjacent positions in the lens holding component 2. Here, the so-called "adjacent" preferably refers to that the distance DS1 between the second magnetic component 10 (second front magnetic component 10F) and the inner guided portion IGD (groove 2V (front groove 2VF)) in the Y-axis direction is smaller than half the length of the lower shape memory alloy wire SAD, and more preferably refers to that the distance DS2 (refer to the length DS2 of the inner guided portion IGD (groove 2V) in the optical axis direction) is smaller than half the length of the lower shape memory alloy wire SAD. Figure 7 This is to suppress the rotation of the lens holding member 2 around the inner guide portion IG (guide member 7).

[0143] According to this configuration, the lens driving device 101 can increase the force with which the inner guide portion IG (guide member 7) and the inner guided portion IGD (groove portion 2V) are pressed against each other.

[0144] In addition, the first magnetic member 9 and the second magnetic member 10 may both be formed of magnets. In this case, the magnetic force generated between the first magnetic member 9 and the second magnetic member 10 may be an attractive force.

[0145] This configuration has an effect of increasing the force of attraction between the lens holding member 2 and the supporting member 3 compared to a configuration in which neither the first magnetic member 9 nor the second magnetic member 10 is a magnet.

[0146] In addition, the first magnetic component 9 can also be Fig.12 As shown in the figure, the second magnetic member 10 can be mounted on the support member 3 via the anti-slip structure. Figure 8 As shown in the figure, it is mounted on the lens holding member 2 via the anti-detachment structure.

[0147] This configuration has an effect of preventing the first magnetic member 9 and the second magnetic member 10 from falling off in the direction in which the magnetic force generated between the first magnetic member 9 and the second magnetic member 10 acts.

[0148] In addition, the inner guide portion IG (guide member 7) may also be Fig. 22 As shown in the figure above, the inner guided portion IGD (groove portion 2V) has a curved convex portion protruding toward the inner guided portion IGD (groove portion 2V). In this case, the inner guided portion IGD (groove portion 2V) may also be as shown in the figure above. Fig. 22 As shown in the figure above, the guide member 7 has a concave portion capable of accommodating the convex portion. In the example shown in the figure, the guide member 7 has a substantially cylindrical convex portion protruding toward the groove portion 2V, and the groove portion 2V has a concave portion capable of accommodating the substantially cylindrical convex portion.

[0149] This configuration makes it easier to downsize the lens driving device 101, compared with a configuration in which the inner guide portion IG (guide member 7) is provided on the lens holding member 2 and the inner guided portion IGD is provided on the support member 3. This is because the inner guide portion IG (guide member 7) is preferably configured to have a length in the optical axis direction greater than the length of the inner guided portion IGD.

[0150] In addition, if Fig.12 As shown in the central figure of FIG. , the support member 3 may also have two inner guide portions IG (rear guide member 7B and front guide member 7F). In this case, as shown in FIG. Fig. 22 As shown in the above figure, the lens holding member 2 may also have two inner guided portions IGD (rear groove 2VB and front groove 2VF). In this case, the two inner guided portions IGD (rear groove 2VB and front groove 2VF) may also be configured such that one is a V-shaped groove (a groove receiving the guide member 7 at two locations) and the other is a U-shaped groove (a groove receiving the guide member 7 at one location). In the example shown in the figure, the rear groove 2VB is a V-shaped groove and the front groove 2VF is a U-shaped groove.

[0151] This configuration has an effect of stabilizing the posture of the lens holding member 2 when the lens holding member 2 is moved in the optical axis direction, compared with a configuration in which the support member 3 has one inner guide portion IG and the lens holding member 2 has one inner guided portion IGD.

[0152] In addition, the two inner guide parts IG (the rear guide member 7B and the front guide member 7F) may also be Fig. 22 As shown in the above figure, the two inner guided portions IGD (the rear groove portion 2VB and the front groove portion 2VF) may be arranged to face each other across the optical axis OA.

[0153] This configuration brings about an effect of stabilizing the posture of the lens holding member 2 when the lens holding member 2 is moved in the optical axis direction, compared with a configuration in which the two inner guide portions IG are arranged closer to each other.

[0154] In addition, if Fig. 22 As shown in the figure below, a first line (first lower line SAD1) and a second line (second lower line SAD2) may be arranged to cross each other in a side view observed from a direction perpendicular to the optical axis direction to form a line pair. In this case, Fig. 22 As shown in the above figure, the shape memory alloy wire SA may include two wire pairs. Furthermore, one wire pair (the first lower wire SAD1 and the second lower wire SAD2) and the other wire pair (the third lower wire SAD3 and the fourth lower wire SAD4) may be arranged opposite to each other across the optical axis OA.

[0155] Compared with a configuration in which the first drive unit DM1 is realized by a single line pair, this configuration has the effect of stabilizing the posture of the lens holding member 2 when the lens holding member 2 is moved along the optical axis direction. In addition, compared with a configuration in which the first drive unit DM1 is realized by a single line pair, this configuration has the effect of increasing the driving force generated by the first drive unit DM1.

[0156] In addition, if Fig.25 As shown, the lens driving device 101 may also include: a fixed side part FB (lower cover part 4L), having a flat outer guide part EG (bottom plate part 4D) for guiding the supporting part 3 in a direction perpendicular to the optical axis direction (X-axis direction and Y-axis direction); and a driving part DM (second driving part DM2) for moving the supporting part 3 in a direction perpendicular to the optical axis direction (X-axis direction and Y-axis direction).

[0157] This configuration brings about an effect of stabilizing the posture of the support member 3 when the support member 3 is moved in a direction perpendicular to the optical axis direction, compared with a configuration without the flat outer guide portion EG.

[0158] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited by the above embodiments. The above embodiments can be applied to various deformations and substitutions without departing from the scope of the present invention. In addition, the features described with reference to the above embodiments can also be appropriately combined as long as they are not technically contradictory.

[0159] For example, in the above-described embodiment, the contact between the inner guide portion IG and the inner guided portion IGD is achieved by the contact between metal and synthetic resin, but the contact between metals or between synthetic resins may be achieved.

[0160] Description of Reference Numerals

[0161]

Claims

1. A lens driving device, characterized in that: have: Support components; a lens holding member having a cylindrical portion on which the lens body can be disposed and capable of moving in the optical axis direction relative to the supporting member; and A plurality of shape memory alloy wires are provided between the support member and the lens holding member to move the lens holding member in the optical axis direction. The support member includes a guide portion for guiding the movement of the lens holding member in the optical axis direction and a first magnetic member. The lens holding member comprises: a guided portion that slides with the guide portion and is guided by the guide portion; and a second magnetic member that is arranged at a position separated from the first magnetic member in a direction intersecting the optical axis direction. The first magnetic component and the second magnetic component are configured such that at least one of them is composed of a magnet, and a magnetic force is generated between the first magnetic component and the second magnetic component, so that a force acts in a direction intersecting the optical axis direction to press the guiding part and the guided part against each other. Regardless of the position of the lens holding component in the optical axis direction, the guiding part and the guided part are in contact with each other.

2. The lens driving device according to claim 1, characterized in that: When current flows through the shape memory alloy wire, the shape memory alloy wire contracts so as to reduce the force of the guide portion and the guided portion being pressed against each other, compared to when no current flows through the shape memory alloy wire.

3. The lens driving device according to claim 2, characterized in that: The shape memory alloy wire comprises: a first wire, one end portion of the first wire supported by the support member being arranged at a position lower than the other end portion of the first wire supported by the lens holding member in the optical axis direction; as well as a second wire, one end portion of the second wire supported by the support member is arranged at a position higher than the other end portion of the second wire supported by the lens holding member in the optical axis direction; The first wire and the second wire respectively fix the one end portion to a first metal component provided on the supporting component, and fix the other end portion to a second metal component provided on the lens holding component, and the first wire and the second wire are respectively configured so that, in a direction intersecting the optical axis direction, the position where the one end portion is fixed to the first metal component is farther away from the guide portion than the position where the other end portion is fixed to the second metal component.

4. The lens driving device according to any one of claims 1 to 3, characterized in that: The second magnetic member and the guided portion are provided at adjacent positions in the lens holding member.

5. The lens driving device according to claim 4, characterized in that: The first magnetic component and the second magnetic component are both composed of magnets. The magnetic force is gravitational force.

6. The lens driving device according to claim 5, characterized in that: The first magnetic member is mounted on the supporting member via an anti-detachment structure. The second magnetic member is attached to the lens holding member using a retaining structure.

7. The lens driving device according to any one of claims 1 to 3, characterized in that: The guide portion has a curved convex portion protruding toward the guided portion. The guided portion has a concave portion capable of accommodating the convex portion.

8. The lens driving device according to any one of claims 1 to 3, characterized in that: The supporting member has two guide portions. The lens holding member has two guided portions.

9. The lens driving device according to claim 8, characterized in that: The two guide portions are arranged to face each other across the optical axis. The two guided portions are arranged to face each other across the optical axis.

10. The lens driving device according to claim 3, characterized in that: One of the first lines and one of the second lines are arranged to cross each other in a side view viewed from a direction perpendicular to the optical axis direction to form a line pair. The shape memory alloy wire comprises two wire pairs, The line pair on one side and the line pair on the other side are arranged to face each other with the optical axis interposed therebetween.

11. The lens driving device according to claim 1, characterized in that: have: a fixed-side member having an outer guide portion for guiding the support member in a direction perpendicular to the optical axis direction; and The driving unit moves the supporting member in a direction perpendicular to the optical axis direction.

12. A camera module, characterized in that: have: The lens driving device according to claim 1; the lens body held by the lens holding member; and The imaging element is arranged to face the lens body.

Images