Lens driving device, camera device, and electronic device

Abstract

The present application provides a lens driving device that is easy to mass-produce. The lens driving device (5) includes: a carrier (22) that holds a lens body (6); a frame (24) that supports the carrier (22) so as to be movable in a direction along an optical axis of the lens body (6); a base (33) that supports the frame (24) so as to be movable in a direction orthogonal to the optical axis; and an FPC (60) that detects a position of the carrier (22) and that carries and electrically connects an AF driving IC (61) that drives the carrier (22) in the direction along the optical axis. The frame (24) is formed by assembling a first metal member (T2 to T5) and a second metal member (T1, T6) that are bent elongated plate-like bodies into resin.

Description

TECHNICAL FIELD

[0001] The present application relates to a lens driving device, a camera device, and an electronic device for an electronic device such as a smartphone. BACKGROUND

[0002] A camera device having an auto focus function and a shake correction function with closed loop control is known. As a document related to such a camera device, there is Patent Literature 1. In this camera device, a solid circuit is formed on an outer peripheral surface of a lens holder, and a position sensor is directly mounted on the solid circuit.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Laid-Open No. 2017-37306 SUMMARY

[0006] (PROBLEMS TO BE SOLVED BY THE INVENTION)

[0007] However, the above-described prior art requires a large number of dedicated devices for component mounting, and has a problem in terms of mass production.

[0008] The present application is conceived in view of such a problem, and aims to provide a lens driving device that is easy to mass produce.

[0009] (MEANS FOR SOLVING THE PROBLEMS)

[0010] In order to solve the above-described problem, a lens driving device according to a preferred embodiment of the present application is characterized by including: a carrier that holds a lens body; a frame that supports the carrier so as to be movable in a direction along an optical axis of the lens body; a base that supports the frame so as to be movable in a direction orthogonal to the optical axis; and an FPC (flexible printed circuit) that detects a position of the carrier, and that carries and electrically connects a circuit element that drives the carrier in the direction along the optical axis, the frame being formed by assembling a first metal member and a second metal member, which are curved elongated plate-like bodies, into a resin, the base being electrically connected to a first end portion of the first metal member that is exposed, the carrier being electrically connected to a first end portion of the second metal member that is exposed, and the FPC being mounted to the frame and being electrically connected to each second end portion of the first metal member and the second metal member that is exposed.

[0011] In this embodiment, the second end portion can be exposed to one side surface of the frame that is parallel to the optical axis, and the FPC can be mounted to the side surface.

[0012] In addition, the first end portion of the first metal member and the first end portion of the second metal member can be arranged on the side surface of the frame such that the plate surface of the plate-shaped body faces outward and extends from the rear side to the front side in the optical axis direction, and the plate surface is bent in a direction orthogonal to the optical axis on the front side of the second end portion to form a horizontal portion, and the first end portion is bent toward the front side to have a crease in a direction orthogonal to the extending direction of the horizontal portion.

[0013] In addition, the second end portion of the first metal member and the second end portion of the second metal member can be arranged on the side surface of the frame such that the plate surface of the plate-shaped body faces outward and extends from the rear side to the front side in the optical axis direction, and the plate surface is bent in a direction orthogonal to the optical axis on the front side of the second end portion to form a horizontal portion, and the first end portion is bent toward the front side to have a crease in a direction orthogonal to the extending direction of the horizontal portion.

[0014] In addition, the second end portion of the first metal member and the second metal member can be arranged on the side surface of the frame such that the plate surface of the plate-shaped body faces outward and extends from the rear side to the front side in the optical axis direction, and the plate surface is bent in a direction orthogonal to the optical axis on the front side of the second end portion to form a horizontal portion, and the first end portion is bent toward the front side to have a crease in a direction orthogonal to the extending direction of the horizontal portion.

[0015] In addition, the second end portion of the first metal member and the second metal member can be arranged on the side surface of the frame such that the plate surface of the plate-shaped body faces outward and extends from the rear side to the front side in the optical axis direction, and the plate surface is bent in a direction orthogonal to the optical axis on the front side of the second end portion to form a horizontal portion, and the first end portion is bent toward the front side to have a crease in a direction orthogonal to the extending direction of the horizontal portion.

[0016] In addition, the circuit element can be a Hall element, and a position detection magnet can be provided on the carrier opposite the circuit element.

[0017] In addition, there can be four first metal members and two second metal members.

[0018] In addition, a driving coil can be provided on the carrier and electrically connected to the first end portion of the second metal member, and a driving magnet can be provided on the frame opposite the driving coil.

[0019] A camera device according to another preferred embodiment of the present application includes the lens driving device described above.

[0020] The electronic device according to the present application is characterized by comprising the camera device described above.

[0021] (Effects of Invention)

[0022] The lens driving device according to the present application includes a carrier that holds a lens body; a frame that supports the carrier so as to be movable in a direction along an optical axis of the lens body; a base that supports the frame so as to be movable in a direction orthogonal to the optical axis; and an FPC (Flexible Printed Circuit) that detects a position of the carrier and is mounted with and electrically connected to a circuit element that drives the carrier in the direction along the optical axis, the frame is formed by assembling a first metal member and a second metal member, which are bent elongated plate-like bodies, into a resin, the base is electrically connected to a first exposed end portion of the first metal member, the carrier is electrically connected to a first exposed end portion of the second metal member, and the FPC is mounted to the frame and is electrically connected to second exposed end portions of the first metal member and the second metal member. Thus, according to the present application, the frame can be formed by insert molding, and the FPC mounted with the circuit element is mounted to the frame and is electrically connected to the first metal member and the second metal member. This facilitates automated production and easy mass production. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a front view of a smartphone 100 mounted with a camera device 3 including a lens driving device 5 according to the present application.

[0024] Figure 2 is a perspective view of the lens driving device 5 of Figure 1

[0025] Figure 3 is an exploded perspective view of the lens driving device 5 of Figure 2

[0026] Figure 4 is an upside-down exploded perspective view of the lens driving device 5 of Figure 3

[0027] Figure 5 is an exploded perspective view of an AF section 20 of Figure 3

[0028] Figure 6 is an upside-down exploded perspective view of the lens driving device 5 of Figure 5

[0029] Figure 7 is a view of a front side support section 21 of Figures 3 to 6

[0030] Figure 8 is a view of the front side support section 21 of Figure 2 ​​​​​​The image shows the lens drive device 5 housing 10 viewed from the +Z side.

[0031] Figure 9 This is a view of frame 24 from the +Z side.

[0032] Figure 10 yes Figure 9 The three-dimensional view of the frame 24.

[0033] Figure 11 In the diagram, (a) is a view of the frame 24 containing metal components T1 to T6 (shown by dashed lines) from the +Z side; (b) is a view of the frame 24 containing metal components T1 to T6 (shown by dashed lines) from the -Y side; (c) is a view of metal components T1 to T6 from the -X side; (d) is a view of metal components T1 to T6 from the +X side; (e) is a view of metal components T1 to T6 from the +Z side; and (f) is a view of metal components T1 to T6 from the -Y side.

[0034] Figure 12 Viewing it from another angle Figure 10 The three-dimensional view of the frame 24.

[0035] Figure 13 This is a diagram of the AF driver FPC60 with the AF driver IC61 fixed, viewed from the +Y side.

[0036] Figure 14 This is a diagram showing the connection status between the AF drive FPC60 and the frame 24.

[0037] Figure 15 This is a perspective view of frame 24a in the second embodiment of the present invention.

[0038] Figure 16 In the middle, (a) is viewed from the +Z side. Figure 15 (a) is a diagram of the metal components T1 to T6 of the frame 24a, and (b) is a diagram of the metal components T1 to T6 viewed from the -Y side.

[0039] Figure 17 This is a perspective view of frame 24b in the third embodiment of the present invention.

[0040] Figure 18 In the image, (a) is viewed from the -X side. Figure 17 (a) A diagram of metal components T1 to T6 of frame 24a; (b) A diagram of metal components T1 to T6 viewed from the +X side; (c) A diagram of metal components T1 to T6 viewed from the +Z side; (d) A diagram of metal components T1 to T6 viewed from the -Y side. Detailed Implementation

[0041] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1As shown, a camera device 3, which includes a lens driving device 5 as a first embodiment of the present invention, is housed within the frame of a smartphone 9.

[0042] The camera device 3 includes: a lens body 6; an image sensor 7 that converts light incident through the lens body 6 into an image signal; and a lens driving device 5 that drives the lens body 6.

[0043] The structure of the lens drive device 5 will be explained below by establishing an XYZ orthogonal coordinate system consisting of a Z-axis parallel to the optical axis of the lens body 6 and X-axis and Y-axis orthogonal to each other and the Z-axis. Furthermore, when viewed from the lens body 6, the side of the object being photographed is referred to as the front side, and the opposite side (the image sensor 7 side) as the rear side. The front side corresponds to the +Z side, and the rear side corresponds to the -Z side.

[0044] like Figure 3 and Figure 4 As shown, the lens driving device 5 houses a front support 21, a carrier 22, an AF coil 23, a frame 24, a driving magnet 52, a rear support 25, a coil plate 31, a base FPC 32, and suspension wires 411-414 within the frame that makes up the base 33 and the housing 10. Figure 2 As shown, it is roughly rectangular in shape. A through hole 11 is provided in the center of the lens driving device 5, which runs through the Z direction to allow incident light from the photographed object to pass through.

[0045] The components within the lens drive unit 5 can be broadly divided into an AF (Auto Focus) section 20 and an OIS (Optical Image Stabilization) section 30. The AF section 20 achieves autofocus by driving the carrier 22 that holds the lens body 6 along the Z-axis. The OIS section 30 achieves shake correction by driving the AF section 20 together with the carrier 22 along the X-axis and Y-axis.

[0046] The AF section 20 has a front support section 21, a carrier 22, an AF coil 23, a frame 24, a drive magnet 52, and a rear support section 25. The frame 24 is a hollow, generally square-shaped component, with four trapezoidal column-shaped drive magnets 52 held at its four inner corners.

[0047] Carrier 22 is capable of holding Figure 1The lens body 6 is a generally annular component of the lens holding hole 221. The lens holding hole 221 is part of the through hole 11. The AF coil 23 is wound around the slot 222 and fixed in a manner that surrounds the carrier 22. The AF sensor magnet 51 is embedded and fixed in the recess 223 on the outer side of the carrier 22. The carrier 22, which has the AF coil 23 and the AF sensor magnet 51 fixed, is housed in the frame 24. At this time, the AF coil 23 is opposite to each of the driving magnets 52, and the AF sensor magnet 51 is opposite to the AF driving IC 61.

[0048] like Figure 5 As shown, the rear support portion 25 has: a central annular inner portion 251; four outer portions 252 surrounding the inner portion 251; and four spring portions 253 connecting the inner portion 251 and each of the outer portions 252.

[0049] The inner portion 251 of the rear support portion 25 supports the -Z side surface of the carrier 22. The four outer portions 252 are fixed to the four corners of the -Z side surface of the frame 24. That is, the rear support portion 25 is located between the carrier 22 and the frame 24, and supports the carrier 22 from the -Z side.

[0050] like Figure 7 As shown, the front support portion 21 is composed of four first front springs 211-214 and two second front springs 215-216. The first front springs 211-214 and the second front springs 215-216 are electrically insulated from each other, but are all fixed to the frame 24. When viewed from the Z direction, the front support portion 21 has a generally square shape, with the first front springs 211-214 located at the outer corners and the second front springs 215-216 located on the inner side.

[0051] The first front springs 211, 212, 213, and 214 each have outer portions 2111, 2121, 2131, and 2141, and two first spring portions 2113, 2123, 2133, and 2143. The outer portions 2111, 2121, 2131, and 2141 are fixed to the +Z side of the frame 24. The outer portions 2111, 2121, 2131, and 2141 are respectively provided with connecting portions 2112, 2122, 2132, and 2142, which are electrically connected to the first metal components T2 to T5 described later. Each pair of first spring portions 2113, 2123, 2133, and 2143 extend outward from the outer portions 2111, 2121, 2131, and 2141 in a manner that forms the equilateral sides of an isosceles right triangle, and form wire support portions 2114, 2124, 2134, and 2144 at the intersection.

[0052] The second front springs 215 and 216 each have: two outer portions 2151 and 2161; inner portions 2153 and 2163; and second spring portions 2154 and 2164 connecting their respective outer portions 2151 and 2161 to the inner portions 2153 and 2163. Each outer portion 2151 and 2161 is fixed to the +Z side surface of the frame 24. Each inner portion 2153 and 2163 is fixed to the +Z side surface of the carrier 22. A connecting portion 2152 and 2162 is provided on one of the outer portions 2151 and 2161, and is electrically connected to the second metal members T1 and T6 described later. Connecting portions 2155 and 2165 are provided on the inner portions 2153 and 2163, and are electrically connected to the AF coil 23, respectively.

[0053] Thus, the second front springs 215 and 216 are fixed to the frame 24 and support the carrier 22 from the +Z side.

[0054] like Figure 3 and Figure 5 As shown, an AF drive FPC60 is configured on the outer surface of the Y-side of frame 24. (As...) Figure 6 As shown, an AF driver IC 61 is mounted on the +Y side of the AF driver FPC 60. The AF driver IC 61 is a circuit element that receives power from the base FPC 32 (described later) and drives the carrier 22 along the optical axis. The AF driver IC 61 is housed in a receiving hole 249 provided in the frame 24. The AF driver IC 61 has a magnetic position sensor, such as a Hall element, which detects the position of the carrier 22 in the Z-axis direction by detecting the magnetic field of the AF sensor magnet 51. Furthermore, based on this detected position, power is supplied to the AF coil 23, thereby performing autofocus control to drive the carrier 22 to the appropriate position. The internal structure of the frame 24, the power supply path between the base FPC 32 and the AF driver IC 61, and the power supply path between the AF driver IC 61 and the AF coil 23 will be described later.

[0055] like Figure 3 and Figure 4 As shown, in the OIS section 30, the coil plate 31 and the base FPC 32 are overlapped and fixed to the base 33, and a through hole forming part of the through hole 11 is provided in the center. There are holes 311 at the four corners of the coil plate 31. In addition, in the coil plate 31, OIS drive coils (not shown) are respectively arranged in the area between the inner side of the holes 311 at the four corners and the through hole in the center, and are respectively opposite to the drive magnet 52.

[0056] A mounting is installed on the rear surface of the base FPC32. Figure 4The two OIS drive ICs 325 are shown. The OIS drive ICs 325 are located at the rear side of the drive magnets 52 on the -X+Y side and the drive magnets 52 on the -X-Y side, respectively, and detect the position of the AF section 20 in the XY direction by detecting the magnetic field of the opposing drive magnets 52. Based on the detected position, the OIS drive ICs 325 supply power to the OIS drive coils, thereby driving the AF section 20 in the XY direction and performing the shake correction control that positions the carrier 22 at an appropriate position in the XY direction together with the AF section 20. The end portion of the -Y side of the base FPC 32 is the FPC input / output portion 323 that is bent toward the -Z side and is electrically connected to the outside. The OIS drive ICs 325 are connected to the FPC input / output portion 323. As shown in FIG. 6, the base FPC 32 is bent at the four corners of the base FPC 32, and the four corners of the base FPC 32 are connected to the four corners of the coil board 31, respectively. The base FPC 32 is connected to the four corners of the coil board 31 via the four drive ICs 325, respectively. Figure 3 As shown in FIG. 6, a hole 321 is provided at each position of the four corners of the base FPC 32 corresponding to the holes 311 of the coil board 31, and each hole 321 constitutes a through hole.

[0057] The base 33 is a member that supports the entire lens driving device 5. The four corners of the base 33 are cut away.

[0058] One end of each of the four suspension wires 411 to 414 is fixed by soldering from the rear side of the hole 321 of the base FPC 32, and the other end is fixed by soldering to the wire support portions 2114, 2124, 2134, and 2144 of the front side support portion 21 in the AF section 20. In this way, in the lens driving device 5, the AF section 20 is supported by the base 33 so as to be movable in the XY direction orthogonal to the optical axis via the front side support portion 21 and the four suspension wires 411 to 414. In addition, the front side support portion 21 is electrically connected to the base FPC 32 via the suspension wires 411 to 414.

[0059] Next, the internal configuration of the frame 24, the power supply path between the base FPC 32 and the AF drive IC 61, and the power supply path between the AF drive IC 61 and the AF coil 23 in the present embodiment will be described. First, as shown in FIG. 6, the base FPC 32 is bent at the four corners of the base FPC 32, and the four corners of the base FPC 32 are connected to the four corners of the coil board 31, respectively. The base FPC 32 is connected to the four corners of the coil board 31 via the four drive ICs 325, respectively. Figure 5 Figure 8 As shown in FIG. 6, two columnar portions 224 protrude in the +Z direction from the outer end of the +Z side surface of the carrier 22, and the end portions of the AF coil 23 are wound around the columnar portions 224 to form terminals 225 and 226. The terminals 225 and 226 are electrically connected to the connection portions 2155 and 2165 provided on the inner side portions 2153 and 2163 of the second front side springs 215 and 216, respectively.

[0060] As shown in FIG. 6, two columnar portions 224 protrude in the +Z direction from the outer end of the +Z side surface of the carrier 22, and the end portions of the AF coil 23 are wound around the columnar portions 224 to form terminals 225 and 226. The terminals 225 and 226 are electrically connected to the connection portions 2155 and 2165 provided on the inner side portions 2153 and 2163 of the second front side springs 215 and 216, respectively. Figure 9 Figure 10 ​​As shown, the frame 24 is embedded with: first metal members T2 to T5, which are part of the wiring between the AF drive IC 61 and the four suspension wires 411 to 414; and second metal members T1 and T6, which are part of the wiring between the AF drive IC 61 and the AF coil 23. The first metal members T2 to T5 and the second metal members T1 and T6 are curved plate-like bodies, assembled into resin with both ends exposed from the resin. The first metal members T2 to T5 and the second metal members T1 and T6 are sometimes simply referred to as metal members T1 to T6. These metal members T1 to T6 include horizontal portions T1h to T6h extending along the XY plane. On the front side facing forward on the +Z side of the frame 24, the first ends T2a, T3a, T4a and T5a of the first metal members T2, T3, T4 and T5 and the first ends T1a and T6a of the second metal members T1 and T6 are exposed. Additionally, the second ends T1b, T2b, T3b, T4b and T5b of the first metal members T2, T3, T4 and T5, and the second ends T1b and T6b of the second metal members T1 and T6 are exposed on the side facing the -Y side.

[0061] like Figure 8 As shown, a second front spring 215 is electrically connected to terminal 225 of AF coil 23 in connection portion 2155, and is electrically connected to the first end T6a of the second metal member T6 in connection portion 2152. Additionally, a second front spring 216 is electrically connected to terminal 226 of AF coil 23 in connection portion 2165, and is electrically connected to the first end T1a of the second metal member T1 in connection portion 2162.

[0062] In addition, Figure 8 In this configuration, the first front spring 211, electrically connected to the suspension wire 411 on the wire support 2114, is electrically connected to the first end T2a of the first metal member T2 in the connecting part 2112. The first front spring 212, electrically connected to the suspension wire 412 on the wire support 2124, is electrically connected to the first end T3b of the first metal member T3 in the connecting part 2122. The first front spring 213, electrically connected to the suspension wire 413 on the wire support 2134, is electrically connected to the first end T4b of the first metal member T4 in the connecting part 2132. The first front spring 214, electrically connected to the suspension wire 414 on the wire support 2144, is electrically connected to the first end T5a of the first metal member T5. Here, "electrical connection" refers to an electrical connection achieved through methods such as soldering or welding.

[0063] like Figure 13As shown in FIG. 6, an AF drive IC 61 is provided in the center of the face of the +Y side of the AF drive FPC 60. On the back face of the AF drive IC 61, there are six pads for power supply, reception, or transmission of signals by the AF drive IC 61. In the AF drive FPC 60, electrodes Al to A3 connected to three of the six pads are provided side by side in the X-axis direction on the -X side of the AF drive IC 61, and electrodes A4 to A6 connected to the remaining three pads are provided side by side in the X-axis direction on the +X side of the AF drive IC 61.

[0064] As shown in FIG. 6, an AF drive IC 61 is provided in the center of the face of the +Y side of the AF drive FPC 60. On the back face of the AF drive IC 61, there are six pads for power supply, reception, or transmission of signals by the AF drive IC 61. In the AF drive FPC 60, electrodes Al to A3 connected to three of the six pads are provided side by side in the X-axis direction on the -X side of the AF drive IC 61, and electrodes A4 to A6 connected to the remaining three pads are provided side by side in the X-axis direction on the +X side of the AF drive IC 61. Figure 10 Figure 12 As shown in FIG. 6, an AF drive IC 61 is provided in the center of the face of the +Y side of the AF drive FPC 60. On the back face of the AF drive IC 61, there are six pads for power supply, reception, or transmission of signals by the AF drive IC 61. In the AF drive FPC 60, electrodes Al to A3 connected to three of the six pads are provided side by side in the X-axis direction on the -X side of the AF drive IC 61, and electrodes A4 to A6 connected to the remaining three pads are provided side by side in the X-axis direction on the +X side of the AF drive IC 61. Figure 12 Figure 14 As shown in FIG. 6, an AF drive IC 61 is provided in the center of the face of the +Y side of the AF drive FPC 60. On the back face of the AF drive IC 61, there are six pads for power supply, reception, or transmission of signals by the AF drive IC 61. In the AF drive FPC 60, electrodes Al to A3 connected to three of the six pads are provided side by side in the X-axis direction on the -X side of the AF drive IC 61, and electrodes A4 to A6 connected to the remaining three pads are provided side by side in the X-axis direction on the +X side of the AF drive IC 61.

[0065] Next, the internal structure of the frame 24, i.e., the structure of the metal members Tl to T6 will be described. The metal members Tl to T6 are arranged such that the second end portions Tlb to T6b extend from the rear side to the front side in the optical axis direction with the plate faces of the plate-shaped bodies facing outward on the side face on the -Y side of the frame 24. The metal members Tl to T6 are bent at the front side of the second end portions Tlb to T6b such that the plate faces face the front side, and constitute horizontal portions Tlh to T6h. The horizontal portions Tlh to T6h extend to a predetermined position. The first end portions Tla to T6a are bent in a crank shape from the horizontal portions Tlh to T6h at the predetermined position so as to be in a state in which the plate faces face the front side at a position further forward than the horizontal portions Tlh to T6h. The front ends of the second end portions Tlb to T6b are completely exposed, and except for the AF drive FPC 60, the horizontal portions Tlh to T6h are covered with resin. The first end portions Tla to T6a are exposed only on the faces facing the front side, and the other faces are covered with resin. In this embodiment, the lengths of the horizontal portions T3h and T4h are zero.

[0066] By the above structure, the following six electrical wirings are formed in this embodiment.

[0067] First electrical wiring: base FPC 32 → hanging wire 411 → first front side spring 211 → first metal member T2 → electrode A2 (AF drive FPC 60) → AF drive IC 61;

[0068] ​​The 5th electrical wiring: the AF driving IC 61 → the electrode A1 (the AF driving FPC 60) → the 2nd metal member T1 → the 2nd front side spring 216 → the terminal 226 → the AF coil 23; and

[0069] The 3rd electrical wiring: the base FPC 32 → the hanging wire 413 → the 1st front side spring 213 → the 1st metal member T4 → the electrode A4 (the AF driving FPC 60) → the AF driving IC 61;

[0070] The 4th electrical wiring: the base FPC 32 → the hanging wire 414 → the 1st front side spring 214 → the 1st metal member T5 → the electrode A5 (the AF driving FPC 60) → the AF driving IC 61;

[0071] The 5th electrical wiring: the AF driving IC 61 → the electrode A1 (the AF driving FPC 60) → the 2nd metal member T1 → the 2nd front side spring 216 → the terminal 226 → the AF coil 23; and

[0072] The 6th electrical wiring: the AF driving IC 61 → the electrode A6 (the AF driving FPC 60) → the 2nd metal member T6 → the 2nd front side spring 215 → the terminal 225 → the AF coil 23.

[0073] The metal members T1 to T6 are formed by insert molding to be integral with the frame 24, so that mass production can be performed at low cost. In addition, the 1st end portions T1a to T6a and the 2nd end portions T1b to T6b can also be formed with good positional accuracy. In addition, the AF driving IC 61 is fixed and electrically connected to the flat plate-shaped AF driving FPC 60, so that mass production can be performed at low cost without special equipment. In addition, the fixation of the AF driving FPC 60 to the frame 24 and the electrical connection to the metal members T1 to T6 can also be performed at low cost without special equipment. Thus, the lens driving device 5 of the present embodiment is easy to automate and mass produce.

[0074] The above is a detailed description of the present embodiment. The lens drive device 5 according to the present embodiment is provided with: a carrier 22 that holds a lens body 6; a frame 24 that supports the carrier 22 so as to be movable in a direction along an optical axis of the lens body 6; a base 33 that supports the frame 24 so as to be movable in a direction orthogonal to the optical axis; and an FPC (flexible printed circuit) 60 that detects a position of the carrier 22 and is electrically connected to an AF drive IC 61 that drives the carrier 22 in the direction along the optical axis. The frame 24 is formed by assembling first metal members T2 to T5 and second metal members T1 and T6, which are bent elongated plate-like bodies, into resin. The base 33 is electrically connected to exposed first end portions T2a to T5a of the first metal members T2 to T5. The carrier 22 is electrically connected to exposed first end portions T1a and T6a of the second metal members T1 and T6. The AF drive FPC 60 is mounted to the frame 24 and is electrically connected to exposed second end portions T1b to T6b of the first metal members T2 to T5 and the second metal members T1 and T6.

[0075] Thus, according to the present embodiment, the frame 24 can be formed by insert molding, and the AF drive FPC 60 that carries the AF drive IC 61 is mounted to the frame 24 and is electrically connected to the first metal members T2 to T5 and the second metal members T1 and T6. Therefore, it is easy to automate production and easy to mass-produce.

[0076] Next, the structure of the metal members T1 to T6 of the frame 24a in the second embodiment of the present application will be described with reference to Figure 15 Figure 16 , the frame 24a. The metal members T1 to T6 of the frame 24a are arranged so that the second end portions T1b to T6b extend from the rear side to the front side in the direction of the optical axis with the plate faces of the plate-like bodies facing outward on the side surface of the frame 24a. On the front side of the second end portions T1b to T6b, horizontal portions T1h to T6h are formed by bending so that the plate faces face the front side. The horizontal portions T1h to T6h extend to a predetermined position. The first end portions T1a to T6a are bent to the front side at the predetermined position so as to have a crease in a direction orthogonal to the extending direction of the horizontal portions T1h to T6h. That is, in the present second embodiment, the front ends of the first end portions T1a to T6a of the metal members T1 to T6 protrude from the surface of the +Z side of the frame 24a. Other aspects are the same as in the first embodiment.

[0077] As in the first embodiment, in the present second embodiment, the effect of being easy to automate production and easy to mass-produce can be obtained. In particular, in the present second embodiment, the first end portions T1a to T6a are simply bent to the front side, so it is even easier to manufacture the portions of the first end portions T1a to T6a, but the first end portions T1a to T6a of the first embodiment are easier to electrically connect.

[0078] Next, the structure of the metal members T1 to T6 of the frame 24a in the second embodiment of the present application will be described with reference to​Figure 17 and Figure 18 The structure of the metal members T1 to T6 of the frame 24b in the third embodiment of the present application will be described. The metal members T1 to T6 of the frame 24b are arranged so that the second end portions T1b to T6b extend from the rear side to the front side in the optical axis direction on the side surface of the frame 24b in such a manner that the plate surface of the plate-shaped body faces outward. On the front side of the second end portions T1b to T6b, the plate surface is bent in a direction orthogonal to the optical axis while maintaining the outward orientation to form the horizontal portions T1h to T6h. The horizontal portions T1h to T6h extend to a predetermined position. The first end portions T1a to T6a are bent toward the front side while maintaining the outward orientation of the plate surface in the predetermined position. However, in the present third embodiment, the first end portion T3a is bent toward the front side at a portion where the first end portion T3a is inclined halfway from the second end portion T3b to the horizontal portion T3h, and the first end portion T4a is bent toward the front side at a portion where the first end portion T4a is inclined halfway from the second end portion T4b to the horizontal portion T4h.

[0079] In the present third embodiment, the horizontal portions T1h to T3h of the metal members T1 to T3 and the horizontal portions T4h to T6h of the metal members T4 to T6 are arranged side by side in the Z-axis direction within the side wall of the frame 24b. When viewed from the Z direction, the metal members T1 to T6 need only the dimension in the plate thickness direction. Thus, the frame thickness of the frame 24b in a direction orthogonal to the Z axis when viewed from the Z direction can be reduced. As in the first and second embodiments, the effect of facilitating automated production and easy mass production can be obtained in the present third embodiment as well. In the present third embodiment, the second metal member T1 and the first metal member T2 are exchanged in such a manner that the positions of the second end portion T1b and the second end portion T2b are exchanged, and the first metal member T5 and the second metal member T6 are exchanged in such a manner that the positions of the second end portion T5b and the second end portion T6b are exchanged, in order to arrange the first end portions T1a to T6a in the same manner as in the first and second embodiments.

[0080] (Explanation of Reference Numerals)

[0081] 5 lens driving device; 6 lens body; 7 image sensor; 8 camera device; 9 smartphone; 10 housing; 11 through hole; 20 AF portion; 21 front side support portion; 211 to 214 first front side spring; 215 to 216 second front side spring; 2111, 2121, 2131, 2141, 2151, 2161 outer side portion; 2112, 2122, 2132, 2142, 2152, 2162 connection portion; 2113, 2123, 2133, 2143 first spring portion; 2114, 2124, 2134, 2144 wire support portion; 2153, 2163 inner side portion; 2154, 2164 second spring portion; 2155, 2165 connection portion; 22 carrier; 221 lens holding hole; 222 groove; 223 recessed portion; 224 columnar portion; 225, 226 terminal; 23 AF coil; 24, 24a, 24b frame; 249 accommodation hole; 25 rear side support portion; 251 inner side portion; 252 outer side portion; 253 spring portion; 30 OIS portion; 31 coil board; 311 hole; 32 base FPC; 321 hole; 323 FPC input and output portion; 325 OIS driving IC; 33 base; 411 to 414 suspension wire; 51 AF sensor magnet; 52 driving magnet; 60 AF driving FPC; 61 AF driving IC; A1 to A6 electrode; T2 to T5 first metal member; T1, T6 second metal member; T1a to T6a first end portion; T1b to T6b second end portion; T1h to T6h horizontal portion.

Claims

1. A lens driving device, characterized in that, Establish an XYZ orthogonal coordinate system consisting of a Z-axis parallel to the optical axis of the lens body and X-axis and Y-axis orthogonal to each other and the Z-axis. The lens driving device includes: The carrier that holds the lens body; A frame capable of supporting the carrier in a manner that allows it to move along the optical axis of the lens body; A base capable of supporting the frame in a manner that allows it to move in a direction orthogonal to the optical axis; as well as A flexible printed circuit is used to detect the position of the carrier and to mount and electrically connect circuit elements that drive the carrier along the direction of the optical axis. The frame is formed by assembling a first metal member and a second metal member, which are curved, slender, plate-like bodies, into resin. The first metal member and the second metal member include a horizontal portion extending along the XY plane, a first end portion of the first metal member and a first end portion of the second metal member exposed on the front side facing forward on the +Z side of the frame, and a second end portion of the first metal member and a second end portion of the second metal member exposed on the side facing -Y side of the frame. The base is electrically connected to the exposed first end of the first metal component, and the carrier is electrically connected to the exposed first end of the second metal component. The second end of the first metal member and the second end of the second metal member are configured on the side of the frame such that the plate surface of the plate-like body faces outward and extends from the rear side to the front side in the optical axis direction. The flexible printed circuit is mounted on the Y-side of the frame and electrically connected to the exposed second ends of the first and second metal components.

2. The lens driving device as claimed in claim 1, wherein, The first end of the first metal component is electrically connected to a first front spring, the first front spring is electrically connected to a suspension wire extending from the base, and the first end of the second metal component is electrically connected to a second front spring fixed to the carrier.

3. The lens driving device as described in claim 1, wherein, On the front side of the second end of the first metal member and on the front side of the second end of the second metal member, the plate surface is curved towards the front to form a horizontal portion. The first end is bent in a crank-like shape from the horizontal portion, and the plate surface is positioned further forward than the horizontal portion while maintaining a forward-facing orientation.

4. The lens driving device as claimed in claim 1, wherein, On the front side of the second end of the first metal member and on the front side of the second end of the second metal member, the plate surface is curved towards the front to form a horizontal portion. The first end bends forward to have a crease in a direction orthogonal to the extension direction of the horizontal portion.

5. The lens driving device as claimed in claim 1, wherein, On the front side of the second end of the first metal member and on the front side of the second end of the second metal member, the plate surface is bent in a direction orthogonal to the optical axis while maintaining an outward orientation to form a horizontal portion. The first end bends forward to keep the plate facing outward.

6. The lens driving device as claimed in claim 1, wherein, The circuit element has a Hall element, and the carrier is provided with a position detection magnet opposite to the circuit element.

7. The lens driving device as claimed in claim 6, wherein, There are four of the first metal components and two of the second metal components.

8. The lens driving device as claimed in claim 6, wherein, The carrier is provided with a driving coil and is electrically connected to the first end of the second metal member, and a driving magnet is provided on the frame opposite to the driving coil.

9. A camera device comprising the lens driving device of claim 1.

10. An electronic device comprising the camera apparatus of claim 9.

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