CN201273956Y - Lens driver - Google Patents
Lens driver Download PDFInfo
- Publication number
- CN201273956Y CN201273956Y CNU2008202079446U CN200820207944U CN201273956Y CN 201273956 Y CN201273956 Y CN 201273956Y CN U2008202079446 U CNU2008202079446 U CN U2008202079446U CN 200820207944 U CN200820207944 U CN 200820207944U CN 201273956 Y CN201273956 Y CN 201273956Y
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- lens
- magnetic
- coil
- leaf spring
- supports body
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Abstract
The utility model relates to a lens-driving device, which solves the problems existing in the prior lens-driving device of large size and high energy dissipation and that the lens is prone to axially swing. The lens-driving device is particularly applicable to a small-sized camera or a mobile phone having photograph function. The lens-driving device comprises a magnetic yoke shell, a magnet, a lens support body and a coil, wherein the magnetic yoke shell can be used as a frame and a magnetic conductor, the magnet is internally fixed on the side surface of the magnetic yoke shell, the lens support body is provided with a lens and is arranged inside the magnetic yoke shell, the coil is arranged on the periphery of the lens support body, and the front end of the lens support body is provided with a front side plate type spring and the rear end is provided with a rear side plate type spring. A magnetic-conducting ring which is made of a magnetic-conducting material is arranged between the lens support body and the coil so that more magnetic lines of force can be gathered by the magnetic-conducting ring to pass through the coil, the electromagnetic induction force is increased, and the magnetic field is effectively utilized, and thereby, the electricity is saved; and the magnetic-conducting ring is tightly fit with the lens support body and the coil without clearance, thus the lens-driving device becomes smaller and more exquisite, and the structure becomes compacter.
Description
Technical field
The utility model relates to a kind of lens driver.Thereby specifically a kind ofly be applied to camera, video camera or have on the equipment such as mobile phone of camera function move the lens driving apparatus of reconciling focal length to drive camera lens.
Background technology
The drive unit of focusing of traditional camera generally includes stepper motor, gear, member such as cam and connecting rod is formed, a kind of lens construction of stablizing automatic focus function that has is disclosed as Chinese patent literature CN2938165Y, comprise housing, motor, first gear, second gear, camera lens module and elastic parts, described motor is arranged in this housing, described first gear is arranged in this housing and is fixed on the axle center of this motor, described second gear is arranged in this housing and with this first gear and vertically meshes together, the upper surface of described second gear has a helical ramp, described camera lens module is arranged in this housing, and camera lens module has a projection that contacts with the helical ramp of second gear.Wherein relate to motor, two gears, housing, screw inclined plane and projections and camera lens module, parts are numerous, make that the size of camera is bigger, and therefore the transmission complexity is difficult to adapt to the trend of camera miniaturization.
For adapting to the needs of camera miniaturization, the drive unit that a kind of employing utilizes magnetic field to produce power uses more and more widely, a kind of lens driver is disclosed as Chinese patent literature CN201035200Y, comprise that one is installed in the square gabarit with band circular hole on the base and holds concurrently and is the magnet yoke ring of the outside basket of lens driver, be mounted with magnetite and coil in this magnet yoke ring, be provided with the lens with a lens carrier in the circular hole of magnet yoke ring, the front and back of this lens carrier respectively are provided with the front side spring of band front side pad and the rear side spring of band rear side pad.The principle of this technical scheme is the magnetic field that places magnetite to produce coil, moves, lens are driven into preposition thereby make its driving that is subjected to Amp drive the lens carrier that is fixed together with it to coil electricity.Because this device need not transmission instrument such as motor, gear, cam, screw rod so volume is little, and making and assembly technology are simple.But the technical scheme that above-mentioned patent documentation disclosed, the magnetic line of force that magnetite produces comparatively disperses, and the magnetic induction density in the coil is less, makes that the electromagnetic force that drives the carrier that has camera lens is also less.Make it reach the purpose that drives the carrier that has camera lens, need to increase the length of coil or the electric current in the increasing coil, and the length of increase coil just will inevitably strengthen the size of drive unit.Therefore, at present general manufacturer adopts the method that strengthens the electric current in the coil, and this has just caused the waste of energy.And the magnetic circuit of lens driver be through the utmost point of magnetite to collar extension, get back to another utmost point of magnetite along collar extension again.Be that described magnetic circuit relies on collar extension to finish, this need be between magnetite and the coil, keep certain space between coil and the carrier, and it is compact more that this is unfavorable for that structural design with drive unit gets, nor be beneficial to fixing between coil and the carrier.In addition, in the process that the lens supports body moves along optical axis direction, be vulnerable to power radially and rock, what cause that lens photograph is image blurring.
Summary of the invention
For this reason, technical problem to be solved in the utility model is that the magnetic line of force that provides a kind of compact conformation and magnetite to produce is more concentrated to increase the lens driver that drives camera lens carrier function power.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of lens driver, comprise: a yoke housing as framework, be arranged on the lens supports body that lens are housed in the described yoke housing, be fixedly installed on the coil in described external week of lens supports; Be fixed with magnetite on the described yoke housing medial surface; The front end of described lens supports body is provided with the front side leaf spring, and the rear end is provided with the rear side leaf spring; Described front side leaf spring is fixedly arranged on described yoke enclosure interior front end, and described rear side leaf spring is fixedly arranged on described yoke enclosure interior rear end; Also be provided with the magnetic conduction device between the outer peripheral face of described lens supports body and the described coil.
Described magnetic conduction device is a magnetic guiding loop.
The axial dimension of described magnetic guiding loop is greater than the axial dimension of described coil.
The thickness of described magnetic guiding loop ring wall is 0.05mm-0.1mm.
Described magnetic guiding loop is fixed on the outer circumferential side of lens supports body.
The medial surface of described magnetite is to have to away from the recessed arc-shaped recess of optical axis direction.
Leaf spring and rear side leaf spring include peripheral part and interior perimembranous before described, are provided with a plurality of equally distributed buffer part between the described inside and outside perimembranous.
Described buffer part comprises at least three arms substantially parallel in same plane, connects by the arc connecting portion between two adjacent arms, and the arcuate directions of two adjacent arc connecting portions is opposite.
The xsect of described magnetic guiding loop is annular or polygon ring-type.
Technique scheme of the present utility model has the following advantages compared to existing technology:
1. the utility model utilizes common cooperation of magnetite, yoke housing and magnetic guiding loop to form magnetic structure, be arranged on the magnetic guiding loop between coil and the lens supports body, material by magnetic conduction character is made, can assemble more magnetic lines of force and pass coil, electromagnetic induction power has correspondingly been improved near the magnetic field the intensifier coil, more effectively utilized magnetic field, owing to magnetic induction density becomes big, the electric current in the coil can suitably be turned down simultaneously, but so saves energy.
2. magnetic guiding loop has good magnetic property, and the shape of magnetic guiding loop is consistent with the shape of lens supports body outer circumferential side, and the two can closely be fixed together, and does not need to be provided with the air air gap, can make the more compact structure of drive unit.
3. the buffer part that is provided with between leaf spring peripheral part that is adopted and the interior perimembranous comprises at least three arms substantially parallel in same plane, connect by the arc connecting portion between two adjacent arms, the arcuate directions of two adjacent arc connecting portions is opposite.The impact of the suffered each other power of can cancelling out each other, this structure can be avoided the generation of stress concentration phenomenon, keep out the utility model device with the spring parallel direction on the impulsive force that is subjected to, prevent that spring from damaging, guarantee that simultaneously the lens supports body can not produce skew and rock when optical axis direction moves.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the three-dimensional decomposition texture synoptic diagram of first embodiment of the present utility model;
Fig. 2 is the front view of the first embodiment assembled state of the present utility model;
Fig. 3 is the A-A cross section view of Fig. 2;
Fig. 4 is the schematic perspective view of the magnetic guiding loop of the utility model first embodiment;
Fig. 5 (a) is the synoptic diagram of the front side leaf spring of first embodiment of the present utility model;
Fig. 5 (b) is the synoptic diagram of the rear side leaf spring of the utility model first embodiment;
Fig. 6 (a) is the structural representation that the positioning match part of the lens supports body of the utility model first embodiment is divided;
Fig. 6 (b) is the structural representation that the positioning match part of the pedestal of the utility model first embodiment is divided;
Fig. 7 (a) is the cross section view of the preceding state of driving of the utility model first embodiment;
Fig. 7 (b) is the cross section view of state after the driving of the utility model first embodiment;
Fig. 8 is the schematic perspective view of the utility model second embodiment magnetic guiding loop.
Reference numeral is expressed as among the figure: 2-lens, 3-lens supports body, 4-yoke housing, 5-magnetite, the incline position of 5a-magnetite, the 5b-arcwall face, 6-coil, 7-front side pad, 8a-front side leaf spring, 8b-rear side leaf spring, 9-rear side pad, 10-pedestal, 11-magnetic guiding loop, perimembranous in the 84-peripheral part, 88-, 85-buffer part, 85a-arm, the 12-conducting terminal, 30-base, 30a-groove, 31-bottom, the top of 39-lens supports body, 87-arc connecting portion, 3a-locating piece, 10a-locating slot.
Embodiment
The utility model is a kind of lens driver, and Fig. 1, Fig. 2 and Fig. 3 are the structural representation of first embodiment of the present utility model.In order to describe the characteristics of this embodiment in detail, conjunction with figs. is described as follows:
With reference to figure 1, yoke housing 4 inside top are fixed with front side leaf spring 8a, and the bottom of yoke housing 4 is provided with pedestal 10, are fixed with rear side leaf spring 8b on the pedestal 10.Adopt chimeric supporting mode to be fixed together between yoke housing 4 and the pedestal 10.Four bights of yoke housing 4 inboards are inlaid with magnetite 5.Yoke housing 4 middle inside are provided with lens supports body 3, and lens 2 are housed on the lens supports body, and lens supports body 3 is connected with yoke housing 4 inside top by front side leaf spring 8a, are connected with the pedestal 10 of yoke housing bottom by rear side leaf spring 8b.The outer circumferential side of lens supports body 3 is fixed with ring-type magnetic guiding loop 11, is wound with coil 6 at the outer circumferential side of magnetic guiding loop 11.Be subjected to electromagnetic force after coil 6 energising, electromagnetic force drives lens supports body 3 and moves along optical axis direction.Alleged herein " front side " and the position of " rear side " relation all is for the captured object of camera, represents with " front side " from the near position of captured object exactly, otherwise then uses " rear side " to represent.
As Fig. 1 and Fig. 6 (a), lens supports body 3 is made by the resinousness material, is cylindric in the present embodiment.Lens 2 are installed in the front end of lens supports body 3 by screw thread.The bottom of lens supports body 3 is provided with base 30, and base 30 is provided with detent 30a.The outer circumferential side of lens supports body is fixed with magnetic guiding loop 11.For combining closely, need not to leave the space between the outer circumferential side of magnetic guiding loop 11 and lens supports body 3.
Magnetic guiding loop 11 is to be made as materials such as iron, cobalt, nickel or its alloys by the material with magnetic conduction character.In first embodiment of the present utility model, its shape is processed into ring texture as shown in Figure 4.The axial yardstick of magnetic guiding loop 11 is so just assembled the more magnetic line of force by coil 6 greater than coil 6 yardstick in the axial direction, the magnetic field intensity around the coil 6 is strengthened, thereby the magnetic field force that coil 6 is subjected to is bigger.The thickness of magnetic guiding loop 11 is 0.05mm-0.1mm, to guarantee that the magnetic line of force as much as possible is by coil 6.
Outer circumferential side at magnetic guiding loop 11 is fixed with a coil 6 tightly, and the shape of coil 6 is the drums that form through hot pressing behind spiral.Need not the gap between coil 6 of the present utility model and magnetic guiding loop 11 and the lens supports body 3, can save structure space, helping drives structure designs smaller and more exquisitely, and because coil 6 is wrapped on the lens supports body 3, hardness and requirement of strength to coil 6 self are not high, so just reduce the production difficulty of coil 6, saved cost.
Fig. 5 (a) and 5 (b) are the synoptic diagram of spring of the present utility model, are elaborated below in conjunction with Fig. 1, Fig. 3 and Fig. 6 (a), Fig. 6 (b):
The front side of described lens supports body 3 is provided with a front side leaf spring 8a, rear side is provided with a rear side leaf spring 8b, front side leaf spring 8a and rear side leaf spring 8b are made as light sheets such as aldarys by the metal of the good springiness with conduction property, front and back side board type spring all is provided with peripheral part 84 and interior perimembranous 88, be shaped as the shape of square-outside and round-inside, difference is that rear side leaf spring 8b is made up of symmetry and discontiguous two parts, and its two parts respectively are provided with conducting terminal 12.Be provided with front side pad 7 between front side leaf spring 8a and the yoke housing 4, the peripheral part 84 of front side leaf spring 8a is fixed between magnetite 5 and the front side pad 7, and interior perimembranous 88 is fixed on the tip position 39 of lens supports body 3; By Fig. 7 (b) as can be seen, the thickness of front side pad 7 self is exactly the maximum removable amount of lens supports body 3.Be provided with a rear side pad 9 between magnetite 5 and rear side leaf spring 8b, rear side pad 9 is to be made by the material with insulating property (properties).The peripheral part 84 of rear side leaf spring 8b is fixed on the 10a of foot of pedestal 10, interior perimembranous 88 is fixed on the bottom position 31 of lens supports body 3, the side board type spring 8a front and back both sides that are configured in lens supports body 3 parallel, front and back with 8b, vertical with the optical axis of lens.
As Fig. 5 (a) and 5 (b), be provided with the buffer part 85 of a plurality of radially symmetric arrangement between described peripheral part 84 and the interior perimembranous 88, buffer part 85 is made up of many arm 85a that are intersection or parastate in same plane, and be processed into the arc connecting portion 87 that to avoid the stress concentration phenomenon to occur between two adjacent arm 85a and come transition, each buffer part 85 all has at least two to be arc connecting portion 87 transition that are provided with in the other direction, can the cancel out each other impact of suffered each other power of reciprocal arc connecting portion 87, keep out the utility model device with the spring parallel direction on suffered impulsive force, prevent that spring is damaged.Guarantee that the lens supports body can not produce skew and rock when optical axis direction moves.
As Fig. 7 (a), under the state, the peripheral part 84 of front side leaf spring 8 exists section poor with interior all sides 88 before driving, and lens supports body 3 bears the precompression of front side leaf spring 8 backward directions.As Fig. 7 (b), under state after the driving, lens supports body 3 moves along optical axis direction, and when stroke reached maximum, the tip position 39 of lens supports body 3 was butted on the yoke housing.
As Fig. 6 (a) and Fig. 6 (b), be processed with several locating pieces 3a at the bottom position of lens supports body 3, be processed with chimeric with it supporting several locating slots 10a on the pedestal 10.The nested cooperation of the two can prevent that in assembling process camera lens 2 causes when screwing in lens supports body 3 that lens supports body 3 produces the shape that rotation destroys spring.
Below with regard to linkage editor of the present utility model and principle of work to be described as follows:
(1) magnetic guiding loop 11 is installed in the outer circumferential side of lens supports body 3, lens supports body 3 bottoms are stuck in the detent 30a on the base 30
(2) coil 6 is wrapped in the outer circumferential side of magnetic guiding loop 11;
(3) rear side leaf spring 8b is installed on the lens supports body 3, the interior perimembranous 88 that is about to rear side leaf spring 8b is fixed on the bottom of lens supports body 3;
(4) two tap lines of coil 6 are welded on respectively on the contact of interior perimembranous 88 of rear side leaf spring 8b;
(5) the rear side leaf spring 8b and the pedestal 10 that will have lens supports body 3 fixed, and the peripheral part 84 that is about to rear side leaf spring 8b is fixed on the bottom of pedestal 10;
(6) front side pad 7 is inserted the inboard and fixing of yoke housing 4;
(7) with the inboard of front side leaf spring 8a insertion yoke housing 4, the peripheral part 84 of spring is fixed on the front side pad 7;
(8) four bights of magnetite 5 being inserted yoke housing 4 inboards are respectively also fixed;
(9) pedestal 10 back-offs that will have magnetic guiding loop 11, coil 6, lens supports body 3, a rear side leaf spring 8b are packed in the yoke housing 4 and are fixing;
(10) the interior perimembranous 88 with front side leaf spring 8a is fixed on the tip position 39 of lens supports body 3.
After coil 6 energisings, in the closed magnetic circuit scope of being formed by yoke housing 4, magnetite 5, magnetic guiding loop 11, generation is along the electromagnetic force of optical axis direction, the acting force that electromagnetic force overcomes forward and backward side board type spring 8a and 8b makes lens supports body 3 along moving on the optical axis direction, just can adjust the shift position of lens supports body 3 by the size of current of adjusting energising.
Magnetic guiding loop 11 described in the foregoing description can also be replaced by magnetic conduction sheet a plurality of and that the shape lens periphery is suitable.
Magnetic guiding loop 11 described in the foregoing description can also be configured to structure as shown in Figure 8, and promptly both sides can be processed with outward extending bending part, perhaps can have flange or the like.
The outer circumferential side of interior all sides of magnetic guiding loop 11 and lens supports body also can be processed into polygon in the foregoing description, as long as the outer circumferential side shape of interior all side shapes of assurance magnetic guiding loop 11 and lens supports body 3 is suitable, gets final product thereby the two is fitted tightly together.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (9)
1. lens driver comprises: a yoke housing as framework, be arranged on the lens supports body that lens are housed in the described yoke housing, and be fixedly installed on the coil in described external week of lens supports; Be fixed with magnetite on the described yoke housing medial surface; The front end of described lens supports body is provided with the front side leaf spring, and the rear end is provided with the rear side leaf spring; Described front side leaf spring is fixedly arranged on described yoke enclosure interior front end, and described rear side leaf spring is fixedly arranged on described yoke enclosure interior rear end; It is characterized in that: also be provided with the magnetic conduction device between the outer circumferential side of described lens supports body and the described coil.
2. lens driver according to claim 1 is characterized in that: described magnetic conduction device is a magnetic guiding loop.
3. lens driver according to claim 2 is characterized in that: the axial dimension of described magnetic guiding loop is greater than the axial dimension of described coil.
4. lens driver according to claim 2 is characterized in that: the thickness of described magnetic guiding loop ring wall is 0.05mm-0.1mm.
5. according to any described lens driver among the claim 2-4, it is characterized in that: described magnetic guiding loop is fixed on the outer circumferential side of lens supports body.
6. according to any described lens driver among the claim 1-4, it is characterized in that: the medial surface of described magnetite is to have to away from the recessed arc-shaped recess of optical axis direction.
7. according to any described lens driver among the claim 1-4, it is characterized in that: leaf spring and rear side leaf spring include peripheral part and interior perimembranous before described, are provided with a plurality of equally distributed buffer part between described interior perimembranous and the described peripheral part.
8. lens driver according to claim 7, it is characterized in that: described buffer part comprises at least three arms substantially parallel in same plane, connect by the arc connecting portion between two adjacent arms, the arcuate directions of two adjacent arc connecting portions is opposite.
9. according to any described lens driver among the claim 2-4, it is characterized in that: the xsect of described magnetic guiding loop is annular or polygon ring-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202079446U CN201273956Y (en) | 2008-08-25 | 2008-08-25 | Lens driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202079446U CN201273956Y (en) | 2008-08-25 | 2008-08-25 | Lens driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201273956Y true CN201273956Y (en) | 2009-07-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202079446U Expired - Lifetime CN201273956Y (en) | 2008-08-25 | 2008-08-25 | Lens driver |
Country Status (1)
| Country | Link |
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| CN (1) | CN201273956Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445811A (en) * | 2010-10-04 | 2012-05-09 | 三星电机株式会社 | Image photographing device having function for compensating for hand vibration |
| CN102455480A (en) * | 2010-10-19 | 2012-05-16 | 思考电机（上海）有限公司 | Lens driving device, autofocus camera, and camera-equipped mobile terminal |
| CN102799046A (en) * | 2011-05-24 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Image stabilizing module and imaging device |
| CN103051144A (en) * | 2012-01-09 | 2013-04-17 | 金龙机电股份有限公司 | Voice coil motor |
| WO2013104162A1 (en) * | 2012-01-09 | 2013-07-18 | 金龙机电股份有限公司 | Lens actuator apparatus |
| CN109818480A (en) * | 2017-11-22 | 2019-05-28 | 格科微电子（上海）有限公司 | The voice coil motor structure of camera module |
| CN112769274A (en) * | 2020-04-02 | 2021-05-07 | 新思考电机有限公司 | Lens driving device, photographic device and electronic product |
-
2008
- 2008-08-25 CN CNU2008202079446U patent/CN201273956Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445811A (en) * | 2010-10-04 | 2012-05-09 | 三星电机株式会社 | Image photographing device having function for compensating for hand vibration |
| CN102445811B (en) * | 2010-10-04 | 2015-05-27 | 三星电机株式会社 | Image photographing device having function for compensating for hand vibration |
| CN102455480A (en) * | 2010-10-19 | 2012-05-16 | 思考电机（上海）有限公司 | Lens driving device, autofocus camera, and camera-equipped mobile terminal |
| CN102455480B (en) * | 2010-10-19 | 2013-09-25 | 思考电机（上海）有限公司 | Lens driving device, autofocus camera, and camera-equipped mobile terminal |
| CN102799046A (en) * | 2011-05-24 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Image stabilizing module and imaging device |
| CN102799046B (en) * | 2011-05-24 | 2016-07-06 | 鸿富锦精密工业（深圳）有限公司 | Image stabilization module and imaging device |
| CN103051144A (en) * | 2012-01-09 | 2013-04-17 | 金龙机电股份有限公司 | Voice coil motor |
| WO2013104162A1 (en) * | 2012-01-09 | 2013-07-18 | 金龙机电股份有限公司 | Lens actuator apparatus |
| CN103051144B (en) * | 2012-01-09 | 2016-01-20 | 金龙机电股份有限公司 | Voice coil motor |
| CN109818480A (en) * | 2017-11-22 | 2019-05-28 | 格科微电子（上海）有限公司 | The voice coil motor structure of camera module |
| CN112769274A (en) * | 2020-04-02 | 2021-05-07 | 新思考电机有限公司 | Lens driving device, photographic device and electronic product |
| CN112769274B (en) * | 2020-04-02 | 2022-04-15 | 新思考电机有限公司 | Lens driving device, photographic device and electronic product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIN LONG ELECTRICAL CO., LTD. Free format text: FORMER OWNER: JINLONG HOLDING GROUP CO. LTD. Effective date: 20090904 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090904 Address after: Jinlong Science Park, approach Avenue, North white elephant Town, Zhejiang, Yueqing Province, China: 325603 Patentee after: Jinlong Machinery & Electronic Co., Ltd. Address before: Jinlong Science Park, approach Avenue, North white elephant Town, Wenzhou, Zhejiang, Yueqing Province, China: 325603 Patentee before: Jinlong Proprietary Group Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090715 |
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| CX01 | Expiry of patent term |