Lens driving device, camera device, and electronic device

Abstract

To provide a lens drive device capable of arranging an electric component to a fixing part on an upper surface side.SOLUTION: A lens drive device 1 includes: a base 25; a frame 12 having two erecting parts 121 erecting from the base 25, and a horizontal part 122 connecting the two erecting parts 121; and an electric component attached to the frame 12. In the frame 12, an electric wiring that is electrically connected to the electric component is formed.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] Among lens driving devices having both an OIS (Optical Image Stabilizer) function and an AF (Auto Focus) function, there is one called a periscope type. In a periscope type lens driving device, a lens body and an image sensor are arranged side by side in a direction perpendicular to the incident direction of light from a subject, and light from the subject is reflected by a prism or a mirror, passes through the lens body, and is focused on the image sensor, which converts it into an image signal. Patent Document 1 is a document disclosing a technology related to this type of lens driving device. The lens driving device of Patent Document 1 has a fixed part, a movable part, an elastic element, and a driving 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 transmits an electric signal to control the driving assembly and execute the OIS function and the AF function. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-139223A A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the lens driving device of Patent Document 1, a frame is attached to the top surface (upper surface) of the housing of the fixed part, a magnet for driving in a direction perpendicular to the optical axis is arranged on this frame, and a coil for driving in a direction perpendicular to the optical axis is arranged on the carrier of the movable part. With such a structure, it is difficult to arrange electrical components that require electrical wiring on the fixed part on the top surface side.

[0005] The present invention has been made in view of the above problems, and has an object to provide a lens driving device in which electrical components can be arranged on a fixed portion on the upper surface side. [Means for solving the problem]

[0006] In order to solve the above problems, a lens driving device which is a preferred embodiment of the present invention comprises a frame having a base, two raised portions rising from the base and a horizontal portion connecting the two raised portions, and electrical components attached to the frame, and electrical wiring which is electrically connected to the electrical components is formed within the frame.

[0007] In this aspect, the frame may have a main body made of resin, and the resin may cover metal members that form the electrical wiring.

[0008] The two raised portions may face each other in the optical axis direction of the lens body.

[0009] The camera may further comprise a carrier having an attachment portion for attaching a lens body, and the frame may be provided on both the left and right sides of the carrier.

[0010] The frame may further include a connecting portion that connects the frames on both the left and right sides.

[0011] The connecting portion may be formed by covering a metal member with resin.

[0012] The carrier may also be shaped such that an upper portion is cut away at the front of a cylindrical body, and the connecting portion may be provided in this cut away portion.

[0013] The frames provided on both the left and right sides of the carrier may have the same structure.

[0014] A camera device according to another preferred embodiment of the present invention includes the lens driving device described above.

[0015] An electronic device according to another preferred embodiment of the present invention includes the camera device described above. Effect of the Invention

[0016] The lens driving device according to the present invention includes a base, a frame having two rising portions rising from the base and a horizontal portion connecting the two rising portions, and an electrical component attached to the frame, and electrical wiring electrically connected to the electrical component is formed in the frame. Since the electrical wiring is formed in the U-shaped frame, the electrical component on the fixed portion on the upper surface side can be made conductive. Therefore, it is possible to provide a lens driving device in which an electrical component can be disposed on the fixed portion on the upper surface side. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a front view of a smartphone 9 equipped with a camera device 2 including a lens driving device 1 according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of the lens driving device 1 of FIG. [Diagram 3] 3 is an exploded perspective view of the lens driving device 1 of FIG. 2. FIG. [Figure 4] FIG. 3 is a perspective view of FIG. 2 with the case 11 removed. [Diagram 5] FIG. 5 is a perspective view of FIG. 4 with the frame 12 removed. [Figure 6] FIG. 5 is a perspective view of the frame 12 of FIG. [Figure 7] FIG. 7 is a perspective view showing the inside of a portion on the +Z side of FIG. 6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG.

[0019] The camera device 2 has an image sensor 3, a mirror 4 that reflects light from a subject, a lens body 5 that guides the light reflected by the mirror 4 to the image sensor 3, and a lens driving device 1 that drives the lens body 5.

[0020] Hereinafter, the direction in which light from the subject enters will be referred to as the Y direction as appropriate. Additionally, the direction in which light reflected by mirror 4 heads toward lens body 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. Additionally, 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.

[0021] The lens driving device 1 includes a case 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 holder 19, an AF magnet 20, a detection magnet 21, an AF coil 22, an FPC 23, a suspension wire 24, and a base 25. Of these, the carrier 15, the second OIS coil 16, and the detection magnet 21 constitute a movable part. In addition, the OIS magnet 18, the holder 19, and the AF magnet 20 constitute an intermediate member. In addition, the case 11, the frame 12, the first OIS coil 13, the AF coil 22, the FPC 23, and the base 25 constitute a fixed part.

[0022] The movable part is supported by a holder 19 of the intermediate part via an upper leaf spring 14 and a lower leaf spring 17. The movable part is movable in the Y direction relative to the intermediate part. The intermediate part is supported by a base 25 of the fixed part via a suspension wire 24. The intermediate part, together with the movable part it supports, is movable in the X direction and the Z direction relative to the fixed part. This allows the movable part to move in the X direction, the Y direction and the Z direction relative to the fixed part. In addition, the first OIS coil 13, the second OIS coil 16, the OIS magnet 18, the AF magnet 20 and the AF coil 22 are drive sources for moving the lens body 5 relative to the base 25.

[0023] The case 11 and the base 25 are combined to form a housing. A first opening 110 is provided in the center of the rear wall of the case 11. A second opening 120 is provided in a portion of the front wall of the case 11 that spans from the center to the upper wall.

[0024] The base 25 is formed by molding a body of the base 25 made of resin with the metal plate member 30 and the first metal members 31 and 33 arranged within the resin. The rear edge of the base 25 has an upright portion 250 that stands upright on the upper side. The FPC 23, which is a circuit board, is arranged on the base 25.

[0025] 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 a position corresponding to the carrier 15. Ends of the first metal members 31, 33 are exposed from the left and right end faces of the base 25. The first metal members 31, 33 embedded in the base 25 have through holes 300. The portions of the first metal members 31, 33 where the through holes 300 are provided are exposed on the upper and lower surfaces of the base 25.

[0026] An X-direction detection hall element and a Y-direction detection hall element, which are electrical components, are attached to the bottom surface of the FPC 23. The X-direction detection hall element and the Y-direction detection hall element are housed in the accommodation space of the base 25. AF coils 22 are provided on the left and right sides of the top surface of the FPC 23.

[0027] The frame 12 is formed by molding a body of the frame 12 made of resin with a second metal member 126 disposed within the resin. An end of the second metal member 126 protrudes from the lower end of the frame 12. The second metal member 126 forms electrical wiring, and serves both to reinforce the frame 12 and for electrical wiring. The lower end of the frame 12 is fixed to the base 25. The protruding end of the second metal member 126 is electrically connected to the FPC 23.

[0028] 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 respectively connecting the two rising portions 121 on the left and right, 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 coil 13 for OIS and a Hall element for Z-direction detection, which are electrical components, are provided on the lower surface of the horizontal portion 122 on the right side of the frame 12, and are each electrically connected to a second metal member 126. The first coil 13 for OIS, which is an electrical component, is provided on the lower surface of the horizontal portion 122 on the left side of the frame 12, and is electrically connected to the second metal member 126.

[0029] As shown in Fig. 7, the frame 12 is formed by molding a main body 12B of the frame 12 made of resin with a second metal member 126 disposed within the resin. As shown in Fig. 6, an end of the second metal member 126 protrudes from the lower end of the frame 12. The second metal member 126 forms electrical wiring, and serves both to reinforce the frame 12 and as electrical wiring. The lower end of the frame 12 is fixed to the base 25. The protruding end of the second metal member 126 is electrically connected to the FPC 23.

[0030] Each lower end of the rising portion 121 is notched upward, and this portion combines with the protruding portion of the base 25 to form a strong joint structure, as shown in Fig. 4. In addition, the rear connecting portion 123 combines with the rising portion 250 of the base 25 to form an opening through which light from the lens body 5 passes together with the left and right rising portions 121 on the rear side.

[0031] The holder 19 has a frame 191 surrounding the holder opening 190, and a first wall 192 extending forward from the left and right peripheral portions of the frame 191. At the lower ends of the front, rear, left and right corners of the first wall 192, U-shaped recesses 193 that open in the Z direction are provided. An OIS magnet 18 is provided on the upper surface of the first wall 192. An AF magnet 20 is provided on the lower surface of the first wall 192. An upper leaf spring 14 is fixed to the upper surface of the holder 19, and a lower leaf spring 17 is fixed to the lower surface. The upper leaf spring 14 is wire-shaped and extends inwardly from the front, rear, left and right directions on the upper side of the holder 19. The lower leaf spring 17 is wire-shaped and extends inwardly from the front, rear, left and right directions on the lower side of the holder 19.

[0032] The carrier 15 is a lens support that supports the lens body 5. The carrier 15 has a cylindrical body 151 and a second wall portion 152 that extends forward from the left and right peripheral portions of the cylindrical body 151. The second wall portion 152 is formed by cutting off the upper and lower portions at the front of the cylindrical body 151. The cylindrical body 151 has a through hole 150. The through hole 150 is an attachment portion for the lens body 5, and the lens body 5 is fitted into the through hole 150 between the left and right second wall portions 152 of the carrier 15 and attached to the carrier 15 after the lens driving device 1 is completed. The carrier 15 is supported by the upper leaf spring 14 on the upper front, rear, left and right sides and the lower leaf spring 17 on the lower front, rear, left and right sides. The center of gravity of the movable portion including the lens body 5 and the carrier 15 that supports it is approximately at the center of the upper leaf spring 14 and the lower leaf spring 17 on the front, rear, left and right sides.

[0033] A second coil 16 for OIS is provided on the outer surfaces of the left and right second wall portions 152 of the carrier 15. A detection magnet 21 is provided on the rear lower surface of the second wall portion 152. In addition, the connecting portion 123 of the frame 12 is provided in a portion where the upper portion of the cylindrical body 151 is cut away, and the cylindrical body 151 and the connecting portion 123 overlap when viewed from the X direction.

[0034] Suspension wire 24 passes through U-shaped recess 193 of holder 19, and is installed between through hole 300 of base 25 and upper leaf spring 14. The lower end of suspension wire 24 is inserted through through hole 300 of base 25 and soldered. The upper end of suspension wire 24 is inserted through the tip portion of upper leaf spring 14 that forms a ring shape outside holder 19, and soldered.

[0035] The second coil for OIS 16 constituting the movable part and the magnet for OIS 18 constituting the intermediate member face each other. When a current flows through the second coil for OIS 16, an electromagnetic force in the Y direction is generated in the second coil for OIS 16, and the movable part moves 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 position of the detection magnet 21 in the Y direction relative to the hall element for Y-direction detection.

[0036] The OIS magnet 18 constituting the intermediate member and the first OIS coil 13 constituting the fixed portion face each other. When a current flows through the first OIS coil 13, an electromagnetic force in the Z direction is generated in the first OIS coil 13, and a reaction force is generated in the OIS magnet 18, causing the intermediate member 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 position of the OIS magnet 18 in the Z direction relative to the Z-direction detection Hall element.

[0037] The AF magnet 20 constituting the intermediate member and the AF coil 22 constituting the fixed portion face each other. When a current flows through the AF coil 22, an electromagnetic force in the X direction is generated in the AF coil 22, and a reaction force is generated in 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 position of the AF magnet 20 in the X direction relative to the X-direction detection Hall element.

[0038] The above is the detailed configuration of this embodiment. The lens driving device 1 in this embodiment includes a base 25, a frame 12 having two rising parts 121 rising from the base 25 and a horizontal part 122 connecting the two rising parts 121, and an OIS first coil 13 and a Z-direction detection hall element, which are electrical components attached to the frame 12. A second metal member 126, which is an electrical wiring electrically connected to the electrical components, is formed in the frame 12. Since the electrical wiring is formed in the U-shaped frame 12, it is possible to conduct electrical current to the electrical components at the fixed part on the upper surface side. Therefore, it is possible to provide a lens driving device 1 in which electrical components can be arranged at the fixed part on the upper surface side.

[0039] In the above embodiment, the frames 12 on the left and right sides of the carrier 15 may be provided separately on the left and right sides without being connected by the connecting portion 123. In this case, the frames 12 provided on both the left and right sides of the carrier 15 may have the same structure. It can be manufactured without worrying about whether it is for the left side or the right side. Also, the frame 12 may be provided on only one of the left and right sides of the carrier 15. Also, the two raised portions 121 of the frame 12 may face each other in a direction perpendicular to the optical axis direction. Also, the electrical components may be provided on the raised portions 121 of the frame 12. [Explanation of symbols]

[0040] 1 Lens drive unit 2 Camera equipment 3. Image Sensor 4. Mirror 5 Lens body 9. Smartphones 11 Cases 12 Frames 12B Main unit 13 First coil for OIS 14 Upper leaf spring 15 Career 16 Second coil for OIS 17 Lower leaf spring 18 OIS magnet 19 Holder 20 AF magnet 21 Detection magnet 22 AF coil 23 FPC 24 Suspension wire 25 Base 30 Metal plate parts 31, 33 First metal member 110 First opening 120 Second Opening 121 Start-up Department 122 Horizontal part 123 Connecting part 126 Second metal member 150 Through hole 151 Cylinder 152 2nd wall section 190 Holder opening 191 Frame 192 1st wall section 193 U-shaped recess 250 Standing part 300 through hole

Claims

1. With the base, a frame which is attached and fixed to the base as an independent part, and which has two sets of two opposing raised portions spaced apart from each other so as to rise from the base, and a horizontal portion connecting the two raised portions, the two sets being spaced apart so that the four raised portions are located only on the sides of a substantially rectangular shape; a carrier having a mounting portion for mounting a lens body, the carrier being disposed in a space between the four raised portions such that an optical axis of the lens body is parallel to a facing direction of the two raised portions of each set; an electrical component attached to the frame; Equipped with Electric wiring electrically connected to the electrical component is formed in the frame, The frame further has two connecting portions at the front and rear that connect the horizontal portions of each of the sets, the base is formed with a metal plate member having a thickness smaller than that of the base disposed in resin, the metal plate member being exposed on upper and lower surfaces of the base at positions corresponding to the carrier; The carrier has a shape in which the upper part is cut out at the front of a cylindrical body, the front one of the two connecting parts is provided in this cut-out part, and the upper part at the rear of the cylindrical body is accommodated in a part surrounded by the two horizontal parts and the two connecting parts, and the cylindrical body and this connecting part overlap when viewed from the direction of the optical axis. A lens driving device comprising:

2. The carrier has a shape in which a lower portion is cut away from the front of the cylindrical body, and the metal plate member is exposed on the upper and lower surfaces of the base at a position corresponding to the lower portion of the rear of the cylindrical body.

2. The lens driving device according to claim 1.

3. The frame has a body made of resin, and the resin covers a metal member of which the electrical wiring forms at least a part.

2. The lens driving device according to claim 1.

4. The rear connecting portion of the two connecting portions, together with the two rising portions, forms an opening through which light from the lens body passes.

2. The lens driving device according to claim 1.

5. The two sets of the frame having the rising portion and the horizontal portion have the same structure.

2. The lens driving device according to claim 1.

6. Each lower end of the raised portion is notched upward, and the notched portion is combined with the protruding portion of the base to form a joint structure.

2. The lens driving device according to claim 1.

7. A camera device comprising the lens driving device according to any one of claims 1 to 6.

8. An electronic device comprising the camera device according to claim 7.

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