Lens driving device, camera device, and electronic equipment

Abstract

The present invention provides a lens driving device, a camera device, and an electronic device capable of arranging an electrical component on a fixed portion on the upper surface side. The lens driving device (1) comprises: a base (25); a frame (12) having two rising portions (121) rising from the base (25) and a horizontal portion (122) connected to the two rising portions (121); and an electrical component mounted on the frame (12). Wires electrically connected to the electrical component are formed within the frame (12).

Description

Technical Field

[0001] The present invention relates to a lens driving device, a camera device, and an electronic device used in electronic devices such as smartphones. Background Art

[0002] Among lens drive devices that have both OIS (Optical Image Stabilizer) and AF (AutoFocus) functions, there is a type called a periscope lens drive device. In a periscope lens drive device, a lens body and an image sensor are arranged side by side in a direction perpendicular to the incident direction of light from the subject. The light from the subject is reflected by a prism or a reflector, passes through the lens body, and converges to the image sensor, where it is converted into an image signal. Patent document 1 is a document that discloses technology related to this type of lens drive device. The lens drive device of patent document 1 has a fixed part, a movable part, an elastic element, and a drive assembly. The fixed part has a housing, a base, a frame, and a circuit element, and the movable part has a carrier. The circuit element sends an electrical signal to control the drive assembly to perform the OIS function and the AF function.

[0003]

Prior art literature

[0004] [Patent Literature]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-139223A Summary of the Invention

[0006] [Problems to be solved by the invention]

[0007] However, the lens drive device of Patent Document 1 has a frame mounted on the top surface (upper surface) of the fixed portion housing, on which a drive magnet is positioned perpendicular to the optical axis, and a drive coil is positioned perpendicular to the optical axis on a carrier of the movable portion. This structure presents a difficulty in placing electrical components requiring wires on the top surface of the fixed portion.

[0008] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a lens driving device in which electric components can be arranged on a fixing portion on the upper surface side.

[0009]

Solutions to Solve the Problem

[0010] In order to solve the above-mentioned problems, a lens driving device as a preferred embodiment of the present invention comprises: a base; a frame, which is fixed to the base and has two groups consisting of two upright parts that are spaced apart and opposite to each other in the optical axis direction of the lens body in a manner of standing upright from the above-mentioned base and a horizontal part connecting the above-mentioned two upright parts; a carrier, which has a mounting part for mounting the above-mentioned lens body, and each group of the above-mentioned frame is provided on the left and right sides of the above-mentioned carrier; and a plurality of electrical components mounted on the lower surface of one horizontal part of the above-mentioned two groups of the frame and the lower surface of the other horizontal part of the above-mentioned two groups, and a hole electrically connected to the above-mentioned plurality of electrical components is formed in the above-mentioned frame. The frame further comprises two front and rear connecting parts connecting the two horizontal parts in the two groups, the base is formed in a state where a metal plate component thinner than the base is arranged in the resin, and the metal plate component is exposed to the upper and lower surface sides of the base at a position corresponding to the carrier, and the carrier is in a shape in which the upper part is cut off at the front of the cylinder, and the front connecting part of the two connecting parts is arranged in the cut-off part so that the upper part of the rear part of the cylinder is accommodated in the part surrounded by the two horizontal parts and the two connecting parts, and when viewed from the direction of the optical axis, the cylinder and the connecting part overlap.

[0011] In this embodiment, the frame is made of resin as a main body, and the resin covers the metal parts constituting the electric wires.

[0012] Alternatively, the carrier may be shaped such that a lower portion of the front portion of the cylinder is further cut away, and the metal plate member may be exposed to upper and lower surfaces of the base at a position corresponding to the lower portion of the rear portion of the cylinder.

[0013] Furthermore, the rear connecting portion of the two connecting portions may form an opening through which light from the lens body passes together with the two rear rising portions.

[0014] Furthermore, the rising portion and the horizontal portion of one set of the frame may have the same structure as the rising portion and the horizontal portion of the other set.

[0015] Alternatively, the connection portion may be formed by coating a metal member with resin.

[0016] Furthermore, each lower end of the rising portion may be notched upward, and these notched portions may be combined with the protruding portion of the base to form a coupling structure.

[0017] Alternatively, the frames provided on the left and right sides of the carrier may have the same structure.

[0018] A camera device according to another preferred embodiment of the present invention is characterized by including the above-mentioned lens driving device.

[0019] Another preferred embodiment of the present invention provides an electronic device including the camera device described above.

[0020] Effects of the invention

[0021] The lens drive device of the present invention comprises: a base; a frame having two rising portions extending from the base and a horizontal portion connected to the two rising portions; and electrical components mounted on the frame, with electrical wires formed within the frame to electrically connect the electrical components. Because the electrical wires are formed within the U-shaped frame, electrical conduction is possible with the electrical components located on the upper surface fixing portion. Consequently, a lens drive device is provided that allows the electrical components to be arranged on the upper surface fixing portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of a smartphone 9 equipped with a camera device 2 including the lens driving device 1 according to one embodiment of the present invention.

[0023] Figure 2 yes Figure 1 A perspective view of the lens driving device 1.

[0024] Figure 3 It is decomposed Figure 2 A perspective view of the lens driving device 1.

[0025] Figure 4 It is from Figure 2 A perspective view without the housing 11.

[0026] Figure 5 It is from Figure 4 A perspective view without the frame 12.

[0027] Figure 6 yes Figure 4 A perspective view of the frame 12.

[0028] Figure 7 Yes Figure 6 A perspective view of the interior of the +Z side portion.

[0029]

Explanation of symbols

[0030] 1 Lens drive device; 2 Camera device; 3 Image sensor; 4 Reflector; 5 Lens body; 9 Smartphone; 11 Housing; 12 Frame; 13 First coil for OIS; 14 Upper leaf spring; 15 Carrier; 16 Second coil for OIS; 17 Lower leaf spring; 18 Magnet for OIS; 19 Bracket; 20 AF magnet; 21 Detection magnet; 22 AF coil; 23 FPC; 24 Suspension wire; 25 Base; 30 Metal plate component; 31, 33 First metal component; 110 First opening; 120 Second opening; 121 Standing portion; 122 Horizontal portion; 123 Connecting portion; 126 Second metal component; 150 Through hole; 151 Cylinder; 152 Second wall portion; 190 Bracket opening; 191 Frame portion; 192 First wall portion; 193 U-shaped recessed portion; 250 Standing portion; 300 Through hole. DETAILED DESCRIPTION

[0031] Below, with reference to the attached Figure 1 The embodiments of the present invention are described below. Figure 1 As shown, a camera device 2 including a lens driving device 1 according to an embodiment of the present invention is housed in a smartphone 9 .

[0032] The camera device 2 includes an image sensor 3 , a reflective mirror 4 that reflects light from a subject, a lens 5 that guides the light reflected by the reflective mirror 4 into the image sensor 3 , and a lens driving device 1 that drives the lens 5 .

[0033] Hereinafter, the direction in which light from the subject is incident will be referred to as the Y direction, as appropriate. Furthermore, the direction in which light reflected from the reflector 4 is directed toward the lens 5 will be referred to as the X direction, and the direction perpendicular to both the Y and Z directions will be referred to as the Z direction. Furthermore, the +Y side will sometimes be referred to as the upper side, the -Y side as the lower side, the +X side as the rear side, the -X side as the front side, the +Z side as the left side, and the -Z side as the right side.

[0034] The lens drive device 1 includes a housing 11, a frame 12, a first OIS coil 13, an upper leaf spring 14, a carrier 15, a second OIS coil 16, a lower leaf spring 17, an OIS magnet 18, a bracket 19, an AF magnet 20, a detection magnet 21, an AF coil 22, an FPC 23, a suspension wire 24, and a base 25. The carrier 15, the second OIS coil 16, and the detection magnet 21 constitute the movable portion. The OIS magnet 18, the bracket 19, and the AF magnet 20 constitute the intermediate component. Furthermore, the housing 11, the frame 12, the first OIS coil 13, the AF coil 22, the FPC 23, and the base 25 constitute the fixed portion.

[0035] The movable part is supported on the bracket 19 of the intermediate component via the upper leaf spring 14 and the lower leaf spring 17. The movable part can move in the Y direction relative to the intermediate component. The intermediate component is supported on the base 25 of the fixed component via the suspension wire 24. The intermediate component can move in the X direction and the Z direction relative to the fixed component together with the supported movable part. Thus, the movable part can move in the X direction, the Y direction and the Z direction relative to the fixed component. In addition, the first coil 13 for OIS, the second coil 16 for OIS, the magnet 18 for OIS, the magnet 20 for AF and the coil 22 for AF are driving sources for moving the lens body 5 relative to the base 25.

[0036] The housing 11 and the base 25 are combined into a frame. A first opening 110 is provided in the center of the rear wall of the housing 11. A second opening 120 is provided in the portion extending from the center of the front wall of the housing 11 to the upper wall.

[0037] The base 25 is formed by molding a resin body with the metal plate member 30 and first metal members 31 and 33 disposed within the resin. A rising portion 250 extending upward is formed at the rear edge of the base 25. An FPC 23 serving as a circuit board is disposed on the base 25.

[0038] The metal plate member 30 embedded in the base 25 is thinner than the thickness of the base 25 and is exposed on the upper and lower surfaces of the base 25 at positions corresponding to the carrier 15. The ends of the first metal members 31 and 33 are exposed from the left and right end surfaces of the base 25. The first metal members 31 and 33 embedded in the base 25 have through-holes 300. The portions of the first metal members 31 and 33 provided with the through-holes 300 are exposed on the upper and lower surfaces of the base 25.

[0039] The X-direction detection Hall effect element and the Y-direction detection Hall effect element are mounted on the bottom surface of the FPC 23. These Hall effect elements are housed in the housing space of the base 25. AF coils 22 are provided on the left and right sides of the top surface of the FPC 23.

[0040] The frame 12 is formed by molding a resin body with a second metal component 126 disposed within the resin. The end of the second metal component 126 protrudes from the lower end of the frame 12. The second metal component 126 forms an electrical wire, serving both as reinforcement for the frame 12 and as an electrical wire. The lower end of the frame 12 is fixed to the base 25. The protruding end of the second metal component 126 is electrically connected to the FPC 23.

[0041] The frame 12 has two rising portions 121 rising from the left side of the base 25; two rising portions 121 rising from the right side; left and right horizontal portions 122 connecting the two rising portions 121, respectively; and a connecting portion 123 connecting the left and right horizontal portions 122. The two rising portions 121 face each other in the optical axis direction. The first OIS coil 13 and the Z-direction detection Hall element are provided on the lower surface of the right horizontal portion 122 of the frame 12 as electrical components, each electrically connected to a second metal component 126. The first OIS coil 13 is provided on the lower surface of the left horizontal portion 122 of the frame 12 as an electrical component, electrically connected to the second metal component 126.

[0042] like Figure 7 As shown, the second metal member 126 is inserted into the left and right rising portions 121, the horizontal portion 122 and the connecting portion 123 of the frame 12. The second metal member 126 has a shape that is bent along the various parts in the frame 12. For example, Figure 7 The figure shows that the two second metal members 126 on the rear side form pads electrically connected to the left first OIS coil 13. In other words, the second metal member 126 on the rear connecting portion 123 serves both to reinforce the connecting portion 123 and to electrically connect the left first OIS coil 13. As for the second metal member 126 on the front connecting portion 123, even though it is depicted in a ring shape, it can be understood that it does not serve as an electrical connection.

[0043] Each lower end of the rising portion 121 is cut upward. Figure 4 As shown, it is combined with the protruding portion of the base 25 to form a firmly connected structure. In addition, the rear connecting portion 123 is combined with the rising portion 250 of the base 25, thereby forming an opening for light from the lens body 5 to pass through together with the left and right rising portions 121 on the rear side.

[0044] The bracket 19 has a frame portion 191 that surrounds the bracket opening 190 and a first wall portion 192 that extends forward from the left and right peripheral portions of the frame portion 191. At the lower ends of the front, rear, left, and right corners of the first wall portion 192, a U-shaped recess 193 that opens in the Z direction is provided. An OIS magnet 18 is provided on the upper surface of the first wall portion 192. An AF magnet 20 is provided on the lower surface of the first wall portion 192. An upper leaf spring 14 is fixed to the upper surface of the bracket 19, and a lower leaf spring 17 is fixed to the lower surface. The upper leaf spring 14 is formed on the upper side of the bracket 19 in a linear shape that twists and extends from the inner side of the front, rear, left, and right. The lower leaf spring 17 is formed on the lower side of the bracket 19 in a linear shape that twists and extends from the inner side of the front, rear, left, and right.

[0045] The carrier 15 is a lens support body that supports the lens body 5. The carrier 15 has a cylinder 151 and a second wall portion 152 extending from the peripheral portion of the left and right sides of the cylinder 151 to the front side. The second wall portion 152 is formed by cutting off the upper and lower parts of the front of the cylinder 151. There is a through hole 150 in the cylinder 151. The through hole 150 is the mounting portion of the lens body 5. After the lens driving device 1 is completed, the lens body 5 is mounted on the carrier 15 by being inserted into the through hole 150 between the left and right second walls 152 of the carrier 15. The carrier 15 is supported by the upper leaf spring 14 on the upper side, and supported by the lower leaf spring 17 on the lower side. The center of gravity of the movable part including the lens body 5 and the carrier 15 supporting it is located approximately at the center of the upper leaf spring 14 and the lower leaf spring 17 on the front, back, left, and right sides.

[0046] The second OIS coil 16 is provided on the outer surfaces of the left and right second walls 152 of the carrier 15. A detection magnet 21 is provided on the rear lower surface of the second wall 152. Furthermore, the connecting portion 123 of the frame 12 is provided in the cutout portion of the upper portion of the cylindrical body 151. When viewed in the X direction, the cylindrical body 151 and the connecting portion 123 overlap.

[0047] The suspension wire 24 passes through the U-shaped recess 193 of the bracket 19 and is laid between the through-hole 300 of the base 25 and the upper leaf spring 14. The lower end of the suspension wire 24 is inserted through and soldered to the through-hole 300 of the base 25. The upper end of the suspension wire 24 is inserted through and soldered to the front end of the upper leaf spring 14, which is formed into a loop outside the bracket 19.

[0048] The second OIS coil 16, which constitutes the movable part, and the OIS magnet 18, which constitutes the intermediate member, face each other. When current flows through the second OIS coil 16, an electromagnetic force in the Y direction is generated therein, causing the movable part to move in the Y direction relative to the intermediate member. The Y-direction detection Hall element detects the magnetic field of the opposing detection magnet 21 and outputs a signal indicating the detection result. This signal corresponds to the Y-direction position of the detection magnet 21 relative to the Y-direction detection Hall element.

[0049] The OIS magnet 18, which constitutes the intermediate component, and the first OIS coil 13, which constitutes the fixed portion, face each other. When current flows through the first OIS coil 13, an electromagnetic force in the Z direction is generated on the first OIS coil 13, generating a reaction force on the OIS magnet 18, causing the intermediate component to move in the Z direction relative to the fixed portion. The Z-direction detection Hall element detects the magnetic field of the opposing OIS magnet 18 and outputs a signal indicating the detection result. This signal corresponds to the Z-direction position of the OIS magnet 18 relative to the Z-direction detection Hall element.

[0050] The AF magnet 20, which constitutes the intermediate member, and the AF coil 22, which constitutes the fixed portion, face each other. When current flows through the AF coil 22, an X-direction electromagnetic force is generated in the AF coil 22, generating a reaction force on the AF magnet 20, causing the intermediate member to move in the X-direction relative to the fixed portion. The X-direction detection Hall element detects the magnetic field of the opposing AF magnet 20 and outputs a signal indicating the detection result. This signal corresponds to the X-direction position of the AF magnet 20 relative to the X-direction detection Hall element.

[0051] The above are details of the structure of this embodiment. The lens driving device 1 of this embodiment comprises: a base 25; a frame 12 having two upright portions 121 rising from the base 25 and a horizontal portion 122 connecting the two upright portions 121; and a first coil 13 for OIS and a Hall element for Z-direction detection mounted on the frame 12 as electrical components. A second metal component 126, which is an electrical wire electrically connected to the electrical component, is formed within the frame 12. Because the electrical wire is formed within the U-shaped frame 12, the electrical component of the fixed portion located on the upper surface side can be made conductive. Therefore, it is possible to provide a lens driving device 1 in which electrical components can be arranged on the fixed portion on the upper surface side.

[0052] Furthermore, in the above embodiment, the left and right frames 12 of the carrier 15 may not be connected by the connecting portion 123, but rather separate frames 12 may be provided on the left and right sides. In this case, the frames 12 provided on the left and right sides of the carrier 15 may have the same structure. This allows for manufacturing without regard for the left or right side. Alternatively, a frame 12 may be provided on only one of the left and right sides of the carrier 15. Furthermore, the two rising portions 121 of the frame 12 may face each other in a direction perpendicular to the optical axis. Furthermore, electrical components may be provided on the rising portions 121 of the frame 12.

Claims

1. A lens driving device, characterized in that: have: base; a frame fixed to the base, comprising two sets of two rising portions standing upright from the base and facing each other at a distance in the optical axis direction of the lens body, and a horizontal portion connecting the two rising portions; A carrier having a mounting portion for mounting the lens body, with the frames being provided on the left and right sides of the carrier; and a plurality of electrical components mounted on the lower surface of one horizontal portion of the two groups of the frame and the lower surface of the other horizontal portion of the two groups of the frame, Wires electrically connected to the plurality of electrical components are formed in the frame. The frame further comprises two front and rear connecting parts connecting the two horizontal parts in the two groups. The base is formed by arranging a metal plate member thinner than the base in a resin, and the metal plate member is exposed to the upper and lower surfaces of the base at positions corresponding to the carrier. The carrier comprises a cylindrical body, and wall portions extending forward from the peripheral portions on the left and right sides of the cylindrical body, wherein the wall portions are formed by cutting off the upper and lower portions at the front of the cylindrical body. A through hole is provided in the cylindrical body, and the through hole is a mounting portion for the lens body. The lens body is mounted on the carrier by being inserted into the through hole between the left and right walls of the carrier. The above-mentioned carrier is in a shape with the upper part cut off at the front of the above-mentioned cylinder, and the front connecting part of the above-mentioned two connecting parts is arranged in the cut-off part, so that the upper part of the rear part of the above-mentioned cylinder is accommodated in the part surrounded by the above-mentioned two horizontal parts and the above-mentioned two connecting parts. When viewed from the direction of the optical axis, the above-mentioned cylinder and the connecting part overlap.

2. The lens driving device according to claim 1, wherein: Regarding the frame, a main body of the frame is made of resin, and the resin covers the metal parts constituting the electric wires.

3. The lens driving device according to claim 1, wherein: Of the two connecting portions, the connecting portion on the rear side forms an opening through which light from the lens body passes, together with the two rising portions on the rear side.

4. The lens driving device according to claim 1, wherein: The upright portion and the horizontal portion of one set of the frame have the same structure as the upright portion and the horizontal portion of the other set.

5. The lens driving device according to claim 1, wherein: The lower ends of the rising portions are notched upward, and these notched portions are combined with the protruding portions of the base to form a coupling structure.

6. The lens driving device according to claim 1, wherein: The connecting portion is formed by coating a metal member with resin.

7. The lens driving device according to claim 1, wherein: The carrier has a shape in which a lower portion is further cut away at the front portion of the cylindrical body, and the metal plate member is exposed to upper and lower surface sides of the base at a position corresponding to the lower portion of the rear portion of the cylindrical body.

8. A camera device, characterized in that: A lens driving device according to any one of claims 1 to 7 is provided.

9. An electronic device, characterized in that: A camera device according to claim 8.

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