CN211905825U - Lens driving device, camera device, and electronic apparatus - Google Patents
Lens driving device, camera device, and electronic apparatus Download PDFInfo
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- CN211905825U CN211905825U CN202020889030.3U CN202020889030U CN211905825U CN 211905825 U CN211905825 U CN 211905825U CN 202020889030 U CN202020889030 U CN 202020889030U CN 211905825 U CN211905825 U CN 211905825U
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Abstract
The utility model provides a lens driving device. The lens driving device (1) is rectangular and can obtain sufficient driving force for driving a large lens body, and is provided with: a fixed part; a movable section having a holding section for holding the lens body (6), and moving in the optical axis direction of the lens body (6) relative to the fixed section; four coils (30) wound around the optical axis in a direction orthogonal to the optical axis and disposed on one of the fixed section and the movable section; and four magnets (80) disposed on the other of the fixed portion or the movable portion with respect to each coil (30). The four coils (30) are arranged at intervals of 90 degrees around the optical axis, and the coils (30) facing each other are equal to each other and the coils (30) adjacent to each other are different from each other with respect to the thickness of each coil (30) in the winding axial direction. The utility model also provides a camera device and electronic equipment.
Description
Technical Field
The utility model relates to a used lens drive arrangement of electronic equipment such as smart mobile phone, camera device and electronic equipment.
Background
The voice coil type lens driving device includes a movable portion holding a lens body and a fixed portion holding the movable portion, and a coil and a magnet provided on the movable portion and the fixed portion, and drives the movable portion with respect to the fixed portion by an electromagnetic force generated between the coil and the magnet. Patent documents 1 and 2 disclose techniques related to such a lens driving device. The lens driving device of patent document 1 is used for a housing in which a square yoke and a base are combined, and houses a plate spring, a magnet, a coil base, a washer, and a conduction spring. In the lens driving device, four magnets are provided inside four sides of a yoke, two protrusions having a shape such that a base portion is thin and an outer side is thick are provided on four side surfaces of a coil base, and four coils are wound around the four side surface protrusions. The lens driving device of patent document 2 is used for housing a lens holding portion, a lens barrel portion, a spring, and a driving portion composed of a magnet and a coil in a housing combining a square housing and a substrate. In the lens driving device, two magnets are provided on two opposing surfaces of a lens holding portion, and two coils are provided at positions where the outer sides of the two magnets are aligned in a lens barrel portion.
[ Prior art documents ]
[ patent document ]
[ patent document 1 ] Japanese patent application laid-open No. 2008-268404A
[ patent document 2 ] Japanese patent laid-open No. 2008-111873A
SUMMERY OF THE UTILITY MODEL
[ problem to be solved by the utility model ]
However, in such a camera device, the frame body must be rectangular. However, in the case of the technique of patent document 1, since the pair of magnet coils are provided along the four sides in the housing, it is difficult to form the rectangular shape. In the technique of patent document 2, the number of pairs of magnets and coils in the housing is only 2, and therefore, there is a problem that it is difficult to obtain a large driving force, and a large lens cannot be mounted.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a lens driving device which is rectangular and can obtain a sufficient driving force for driving a large lens body.
[ MEANS FOR SOLVING PROBLEMS ] to solve the problems
In order to solve the above problem, a lens driving device according to a preferred embodiment of the present invention includes: a fixed part; a movable section having a holding section for holding a lens body, the movable section moving in an optical axis direction of the lens body relative to the fixed section; four coils wound around the fixed portion or the movable portion with a direction orthogonal to the optical axis as an axis; and four magnets arranged on the other of the fixed part or the movable part so as to face the respective coils, wherein the four coils are arranged at intervals of 90 degrees around the optical axis, and the coils facing each other are equal in thickness in the winding axial direction of each coil, and the coils adjacent to each other are different from each other.
In this aspect, a hall IC may be provided in the air core of one of the four coils.
Further, a balance member may be provided in the air core portion of the other coil facing the one coil.
The fixing portion may have a base that supports the carriage via four rear springs, and the four rear springs may be respectively disposed between the carriage and the base to form a circuit from the outside to the hall IC.
Further, the movable portion may include: a carrier having 2 pairs of side surfaces facing each other with the holding portion interposed therebetween; and an FPC provided so as to surround the 2 pairs of side surfaces, the coil being provided outside a portion of the FPC surrounding the side surfaces.
In another preferred aspect of the present invention, the camera device includes the lens driving device.
The electronic device according to another preferred embodiment of the present invention is characterized by including the camera device.
[ Utility model effect ]
The utility model discloses a lens drive arrangement possesses: a fixed part; a movable section having a holding section for holding a lens body, the movable section moving in an optical axis direction of the lens body relative to the fixed section; four coils wound around the optical axis in a direction orthogonal to the optical axis and disposed on one of the fixed portion and the movable portion; and four magnets arranged on the other of the fixed part or the movable part with respect to each coil. Accordingly, the four coils are arranged at 90-degree intervals around the optical axis, and the coils facing each other are equal in thickness in the winding axial direction of each coil, and the coils adjacent to each other are different from each other. Therefore, a lens driving device having a rectangular shape and a sufficient driving force for driving a large lens body can be provided.
Drawings
Fig. 1 is a front view of a smartphone 100 on which a camera device 2 including a lens drive device 1 according to an embodiment of the present invention is mounted.
Fig. 2 is a perspective view of the lens driving device 1 of fig. 1.
Fig. 3 is a perspective view of the lens driving device 1 of fig. 2 in an exploded view.
Fig. 4 is a perspective view showing the carriage 60, the FPC50, the coil 30, and the hall IC40 of the lens driving device 1 of fig. 2.
Fig. 5 is a view of fig. 4 viewed from the + Z side.
Fig. 6 is a sectional view taken along line a-a' of fig. 2.
Fig. 7 is a sectional view taken along line B-B' of fig. 2.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in fig. 1, a camera device 2 including a lens driving device 1 according to an embodiment of the present invention is housed in a housing of a smartphone 100.
The camera device 2 includes a lens body 6, an image sensor 9 that converts light incident through the lens body 6 into an image signal, and a lens driving device 1 that holds the lens body 6 and the image sensor 9 and drives the lens body 6.
Hereinafter, the optical axis of the lens body 6 is appropriately referred to as the Z direction, one direction orthogonal to the Z direction is appropriately referred to as the X direction, and a direction orthogonal to both the Z direction and the X direction is appropriately referred to as the Y direction. In addition, the subject side is sometimes referred to as the front side and the opposite side (the image sensor 9 side) as the rear side when viewed from the lens body 6. The anterior side corresponds to the + Z side, and the posterior side corresponds to the-Z side.
As shown in fig. 2 and 3, the lens driving device 1 includes a cover 10, a front side spring 20, four coils 30, a hall IC40, a balance member 41, an fpc (flexible printed circuits)50, a carriage 60, four rear side springs 70, four magnets 80, and a base 90. Of these parts, the fixing part includes a cover 10, a magnet 80, and a base 90. The movable section that moves in the optical axis direction of the lens body 6 with respect to the fixed section includes the coil 30, the hall IC40, the balance member 41, the FPC50, and the carriage 60, and they are integrated.
The cover 10 has a front panel 16 and four side panels 17 extending along the Z side from four sides of the front panel 16. Magnets 80 are fixed to the inner surfaces of the side plates 17. The magnets 80 are formed by laminating two magnets whose plate surface direction magnetization is reversed toward the front side and the rear side in the Z direction. For example, the front side in the Z direction of the inner surface of the magnet 80 is magnetized to the S pole, and the rear side in the Z direction is magnetized to the N pole.
The lower end of the side plate 17 of the cover 10 is fixed to the periphery of the base 90. In the space surrounded by the cover 10 and the base 90, the movable portions are housed inside the four magnets 80.
The carriage 60 has an octagonal shape chamfered to four corners of a quadrangle as viewed from the Z direction. A through hole 61 as a holding portion for holding the lens body 6 is provided in the center of the carriage 60. The carriage 60 has 2 pairs of side surfaces 64 corresponding to four sides and 2 pairs of corner surfaces 65 corresponding to four corners, the 2 pairs of side surfaces 64 facing in the X direction and the Y direction, respectively.
FPC50 has a profile that bends along the 7 sides of carrier 60 except for one corner face 65. The FPC50 is provided so as to have 2 pairs of side plate portions 54 respectively opposed in the X direction and the Y direction and 3 corner plate portions 55 sandwiched between the adjacent side plate portions 54, surrounding the 2 pairs of side surfaces 64 of the carrier 60. The inner surfaces of the side plate portions 54 and the corner plate portions 55 of the FPC50 are fixed to the side surfaces 64 and the corner surfaces 65 of the carrier 60.
The coils 30 are fixed to the outer surfaces of the four side plate portions 54 of the FPC 50. The coil 30 on the outer surface of the side plate portion 54 facing in the X direction is wound around the X direction. The coil 30 on the outer surface of the side plate 54 facing in the Y direction is wound around the Y direction as an axis. The four coils 30 are respectively provided such that the front side portion is opposed to the front side portion of the corresponding magnet 80, and the rear side portion is opposed to the rear side portion of the corresponding magnet 80. As a result, when a current flows through each coil 30, a Z-direction electromagnetic force is generated in each coil.
As shown in fig. 5, four pairs of the coil 30 and the magnet 80 are arranged at 90-degree intervals around the optical axis. The thickness of each coil 30 in the winding axial direction is equal to the thickness of the coils 30 facing each other, the thickness of the coils 30 adjacent to each other is different from each other, and the thickness of the two coils 30 facing each other in the X direction is thinner than the thickness of the two coils 30 facing each other in the Y direction. In order to reduce the thickness, the number of turns may be reduced, but even with the same number of turns, the number of turns in the axial direction may be reduced or the number of turns in the radial direction may be increased, and the coil wire may be thinned. Further, these modes may be combined.
As shown in fig. 4 and 6, hall ICs 40 are provided in the air core portion of the + X-side coil 30 of the two coils 30 facing in the X direction. The hall IC40 faces the plate surface of the + X-side magnet 80. Hall IC40 has 6 pads. The 6 pads are connected to the six electrodes (lands) of the + X-side plate portion 54 of the FPC50, respectively. Two electrodes are electrically connected to two ends of the four coils 30 connected in series, and the same current flows through the four coils 30. Two electrodes may also be electrically connected to respective ends of four coils 30 connected in parallel. A balance member 41 is provided in the air core of the coil 30 on the-X side. The balance member 41 is used to obtain balance with the hall IC 40.
As shown in fig. 6 and 7, the front side spring 20 is disposed between the front plate 16 of the cover 10 and the carriage 60, and four rear side springs 70 are disposed between the base 90 and the carriage 60. The movable portion is elastically supported by the front side spring 20 and the rear side spring 70. The front side spring 20 includes an inner annular inner portion 21 and four arm portions 22 protruding outward from the inner portion 21. The inner portion 21 is fixed to the periphery of the through hole 61 in the front surface of the carriage 60. The wrist portions 22 are fixed to four corners of the front plate 16 of the hood 10.
The four rear springs 70 have an arc-shaped inner portion 71 and arm portions 72 projecting outward from the inner portion 71. The inner portion 71 is fixed to the periphery of the through hole 61 in the rear surface of the carriage 60. The wrist portions 72 are fixed to four corners of the base 90. The inner end portions of the four rear springs 70 are connected to the remaining four electrodes of the aforementioned six electrodes of the FPC50, respectively. The outer ends of the four rear springs 70 are connected to the external substrate, respectively. The four rear springs 70 constitute a part of a circuit from the external substrate to the pads of the hall IC40 through the wiring in the FPC 50.
The hall IC40 detects the magnetic field from the + X-side magnet 80, thereby detecting the relative position with respect to the magnet 80, that is, the position of the carriage 60 and/or the lens body 6 with respect to the fixed portion.
The above is the configuration details of the present embodiment. The lens driving device 1 of the present embodiment includes a fixed portion, a movable portion, four coils 30, and four magnets 80. The movable section has a holding section for holding the lens body 6, and moves in the optical axis direction of the lens body 6 with respect to the fixed section. The four coils 30 are wound around the movable portion with the direction orthogonal to the optical axis as an axis, and the four magnets 80 are disposed on the fixed portion so as to face the respective coils 30. Accordingly, the four coils 30 are arranged at 90 ° intervals around the optical axis, and the coils 30 facing each other are equal to each other and the coils 30 adjacent to each other are different from each other with respect to the thickness of each coil 30 in the winding axial direction. Thus, the lens driving device 1 having a rectangular shape and a sufficient driving force for driving the large lens body 6 can be provided.
In the above embodiment, the hall IC40 may be provided in the air core of one of the two coils 30 facing in the Y direction, and the balancer member 41 may be provided in the air core of the other coil 30. Further, the balance member 41 may not be provided.
In the above embodiment, the front side in the Z direction of the inner surface of the magnet 80 may be an N pole, and the rear side in the Z direction may be an S pole.
In the above embodiment, the coil 30 and the hall IC40 may be provided on the fixed portion side together with the FPC50, and the magnet 80 may be provided on the movable portion side.
In addition, at least four springs are provided which combine the front side spring 20 and the rear side spring 70, and the four springs may constitute a part of the electric circuit. For example, two front springs 20 and two rear springs 70 may be provided to constitute a part of the circuit. Further, four front springs 20 and one rear spring 70 may be provided, and each of the four front springs 20 may constitute a part of the electric circuit. When the front side spring 20 forms a part of the electric circuit, for example, standing portions may be provided at four corners of the base 90, conductive portions through an external substrate may be formed inside the standing portions, and the arm portions 72 of the front side spring 20 may be fixed to the front side surfaces of the standing portions and may be electrically connected to the conductive portions.
[ notation ] to show
1 a lens driving device; 2 a camera device; 6 a lens body; 9 an image sensor; 10, covering; 16 a front plate; 17 side plates; 20 a front side spring; 21 an inner side portion; 22 a wrist portion; 30 coils; 40 Hall IC; 41 a balance member; 50 FPC; 54 side plate parts; a 55 corner plate portion; 60, a carrier; 61 through holes; 64 sides; 65 corner faces; 70 rear side spring; 71 an inner side portion; 72 wrist parts; 80 a magnet; 90, a base; 100 smart phone.
Claims (7)
1. A lens driving device is characterized by comprising:
a fixed part;
a movable section having a holding section for holding a lens body, the movable section moving in an optical axis direction of the lens body relative to the fixed section;
four coils wound around the optical axis in a direction orthogonal to the optical axis and disposed on one of the fixed portion and the movable portion; and
four magnets arranged on the other of the fixed part or the movable part, facing the coils,
the four coils are arranged at 90-degree intervals around the optical axis, and the coils facing each other are equal in thickness in the winding axial direction of each coil, and the coils adjacent to each other are different from each other.
2. The lens driving device according to claim 1,
a hall IC is provided in an air core portion of one of the four coils.
3. The lens driving device according to claim 2,
a balance member is provided in an air core portion of the other coil facing the one coil.
4. The lens driving device according to claim 2,
the movable portion is elastically supported by at least four springs,
the four springs of the at least four springs respectively constitute a part of a circuit from the outside to the hall IC.
5. The lens driving device according to any one of claims 1 to 4,
the movable section includes:
a carrier having 2 pairs of side surfaces facing each other with the holding portion interposed therebetween; and
an FPC provided so as to surround the 2 pairs of side surfaces,
the coil is provided outside a portion of the FPC surrounding the side surface.
6. A camera apparatus characterized by having the lens driving apparatus according to any one of claims 1 to 5.
7. An electronic device comprising the camera device according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020889030.3U CN211905825U (en) | 2020-05-25 | 2020-05-25 | Lens driving device, camera device, and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020889030.3U CN211905825U (en) | 2020-05-25 | 2020-05-25 | Lens driving device, camera device, and electronic apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN211905825U true CN211905825U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020889030.3U Active CN211905825U (en) | 2020-05-25 | 2020-05-25 | Lens driving device, camera device, and electronic apparatus |
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| Country | Link |
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| CN (1) | CN211905825U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113791481A (en) * | 2020-05-25 | 2021-12-14 | 新思考电机有限公司 | Lens driving device, camera device, and electronic apparatus |
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2020
- 2020-05-25 CN CN202020889030.3U patent/CN211905825U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113791481A (en) * | 2020-05-25 | 2021-12-14 | 新思考电机有限公司 | Lens driving device, camera device, and electronic apparatus |
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