CN103227549B - A kind of Subminiature voice coil motor - Google Patents
A kind of Subminiature voice coil motor Download PDFInfo
- Publication number
- CN103227549B CN103227549B CN201310129873.8A CN201310129873A CN103227549B CN 103227549 B CN103227549 B CN 103227549B CN 201310129873 A CN201310129873 A CN 201310129873A CN 103227549 B CN103227549 B CN 103227549B
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- voice coil
- coil motor
- seat
- lens mount
- spring
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Abstract
The invention discloses a kind of Subminiature voice coil motor, comprise being fixedly installed on and stop payment seat between lens mount and base, base inner ring is stretched in this upper end of stopping payment seat, and form the amount of interference of set point, the upper end of stopping payment seat promotes the camber of spring that lens mount moves to make connection on it, and the camber of spring precompression that amount of interference is formed and the external force causing voice coil motor original position to depart from balance each other.The invention solves the problem that amount of interference in prior art is difficult to determine, independently stopping payment seat by arranging, not only can determine amount of interference accurately, magnetic flux efficiency can also be increased and prevent from dust fall and foreign matter from dropping on image perceptron causing image bad.
Description
Technical field
The present invention relates to a kind of Subminiature voice coil motor.
Background technology
The voice coil motor (as shown in Figure 1) of camera module is applied to for preventing the impact when taking pictures by gravity in prior art, in order to make the original position of camera lens stable not because angle and gravity affected, usually single or a plurality of spring is there is in voice coil motor structure, and spring can be connected with lens mount, original position is not caused to depart from because of gravity or angle to make voice coil motor, voice coil motor can make lens mount first produce a displacement in design, and then make spring produce deflection, and the deflection of this spring just defines existing precompression to revolt the impact of gravity.
The technique of existing voice coil motor comes to produce an amount of interference with lens mount with the base of an ejection formation, and when installing voice coil motor, this amount of interference can make base lens mount is pushed to this amount of interference of elimination and cause camber of spring to produce precompression.
Fig. 2 is the Split type structure of existing voice coil motor, because lens mount and base are the part of ejection formation, often all can cause need revising jetting mold to change amount of interference because of the combined tolerances of non-ejection formation and mould condition when penetrating, but because the fine setting of jetting mold is very difficult, especially when precompressed amount is too many, mould even can change and must again make, and the time spent and expense will make design case failure probability improve.
Summary of the invention
For prior art Problems existing, the object of the present invention is to provide a kind of structure to enter improvement, be provided with the voice coil motor stopping payment seat, the problem that when it efficiently solves floor installation in prior art, amount of interference error is larger.
For achieving the above object, a kind of Subminiature voice coil motor of the present invention, comprise being fixedly installed on and stop payment seat between lens mount and base, base inner ring is stretched in this upper end of stopping payment seat, and form the amount of interference of set point, the upper end of stopping payment seat promotes the camber of spring that lens mount moves to make connection on it, and the camber of spring precompression that amount of interference is formed and the external force causing voice coil motor original position to depart from balance each other.
Further, described voice coil motor comprises upper cover, upper spring, enclosing cover, magnet, coil, described lens mount, lower spring, described base and describedly stops payment seat, and described lens mount is clamped by upper spring, lower spring, and coil is fixed on described lens mount.
Further, stopping payment seat described in is that metal material is made.
Further, stopping payment seat described in is that magnetic conductive material is made.
Further, stopping payment seat described in is metal stamping goods.
Further, described lower end of stopping payment seat is provided with seal cover, its circumference of sealing cover rim is outward extended with edge, or at the side of described seal cover to being outside equipped with L-type supporting leg, described edge and L-type supporting leg for described in stop payment the position limiting structure of seat in optical axis direction movement.
Further, described edge, between L-type supporting leg and the lower end of described base by fluid sealant integrated bond.
Further, the lower end of edge, L-type supporting leg and described base described in described fluid sealant integral sealing, to form dust and moisture hermetically-sealed construction.
Further, the outline at described edge is circle, regular hexagon or square.
Further, by the size of the test macro feedback adjustment starting current of described voice coil motor, the described amount of interference of seat at optical axis direction described in setting, is stopped payment.
The invention solves the problem that amount of interference in prior art is difficult to determine, independently stopping payment seat by arranging, not only can determine amount of interference accurately, magnetic flux efficiency can also be increased and prevent from dust fall and foreign matter from dropping on image perceptron causing image bad.
Accompanying drawing explanation
Fig. 1 is the voice coil motor being applied to camera module in prior art;
Fig. 2 is the Split type structure of existing voice coil motor
Fig. 3 is voice coil motor structure schematic diagram of the present invention;
Fig. 4 is the Split type structure schematic diagram of voice coil motor of the present invention;
Fig. 5 is A portion enlarged drawing in Fig. 3.
Embodiment
Below, with reference to accompanying drawing, the present invention is more fully illustrated, shown in the drawings of exemplary embodiment of the present invention.But the present invention can be presented as multiple multi-form, and should not be construed as the exemplary embodiment being confined to describe here.But, these embodiments are provided, thus make the present invention comprehensively with complete, and scope of the present invention is fully conveyed to those of ordinary skill in the art.
For ease of illustrating, here can use such as " on ", the space relative terms such as D score " left side " " right side ", for illustration of the element of shown in figure or the feature relation relative to another element or feature.It should be understood that except the orientation shown in figure, spatial terminology is intended to comprise device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as the element being positioned at other elements or feature D score will be positioned at other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise be located (90-degree rotation or be positioned at other orientation), and space used here illustrates relatively can correspondingly explain.
As shown in Figures 3 to 5, a kind of Subminiature voice coil motor of the present invention, comprise upper cover 1, upper spring 2, enclosing cover 3, magnet 4, coil 5, described lens mount 6, lower spring 7, base 8 and stop payment seat 9, lens mount 6 is by upper spring 2, lower spring 7 clamps, coil 5 is fixed on lens mount 6, stopping payment seat 9 is fixedly installed between lens mount 6 and base 8, base 8 inner ring is stretched in the upper end of stopping payment seat 9, and form the amount of interference of set point, the upper end of stopping payment seat 9 promotes the camber of spring that lens mount moves to make connection on it, the camber of spring precompression that amount of interference is formed and the external force causing voice coil motor original position to depart from balance each other.
The magnet 4 of 4 sheets is arranged in the enclosing cover 3 of rectangle, composition permanent magnet unit; Lens mount 6 is arranged in enclosing cover 3 by split type upper spring 2, lower spring about 7 clamping; Coil 5 is by the coiling of thermoset forming high temperature self-adhesion copper conductor, and suit is fixed on lens mount 6.Its mechanical location is positioned at the lateral gap be made up of magnet 4 and enclosing cover 3 outer wall.Material is thus formed from the N pole of magnet 4, through enclosing cover 3 outer wall, diapire, inwall, through coil 5, finally return a closed magnetic circuit of the S pole of magnet 4, this is also effective magnetic loop that the microminiaturizationvoice voice coil motor that the present invention relates to needs.
When being energized to coil 5, permanent magnet unit applies with upper spring 2, lower spring 7 to the contrary magnetic field force of lens mount 6 to coil 5 and related lens mount 6 thereof, and under the magnetic field force effect of permanent magnet unit 7, coil 5 drive lens seat 6 moves.Changed by the power of electric current in regulating winding 5, thus realize the accurate control that lens mount 6 moves forward and backward displacement; By by magnetic force and upper spring 2, lower spring 7 mechanical return force and make lens mount 6 be returned to initial position.
Upper spring 2, lower spring 7 are all made up of specifically developed a kind of copper, nickel, tin alloy material, and the hardness of this material, elasticity, processing technology, fatigue resistance, conductivity, easily upper tin etc. compare common material to be had and obviously improve.Upper spring 2, lower spring 7 have the inner and outer ring edge of concentric structure, and ring edge realizes radial location by concavo-convex screens and lens mount 6.When movable due to lens mount 6 and drive upper spring 2, the interior ring edge displacement of lower spring 7 reaches capacity behind position, replied by upper spring 2, lower spring 7 and with joint efforts lens mount 6 retracted preliminary examination position, therefore possess good axial resistance to impact.Upper spring 2 adopts full slice system to design, and only bears the function of axial mechanical return force and radial alignment guarantee, but bears electric current guiding function without it, therefore does not need to weld from lens mount 6 middle punch extraction wire with it especially.
Enclosing cover 3 adopts ferrimagnet (such as stainless iron) to make.And magnet 4 is made up of rare earth epistasis permanent magnetic material.The magnetic line of force direction of magnet 4 is radial, by improving ferromagnetic material grade, improves magnetism intensity, compensates the magnetic force produced because volume reduces and weakens problem.
Lens mount 6 is made up of insulating material (such as synthetic resin etc.), and lens mount 6 is for simply to join female cylinder.Lens mount 6 rear end is designed with boss especially, plays the installation positioning function of lower spring 7.
Upper cover 1 and base 8 are made up of insulating material (such as synthetic resin etc.), particularly point out and the invention provides the engaging of simple concavo-convex position, are equipped with cementing fixing, are distributed in junction, four angles (can referring in Fig. 4 8) respectively.The back-off design of abandoning tradition can fully save radial direction and axial space.Lens mount 6, fixing permanent magnetic field unit, upper spring 2, lower spring 7 can be held, and they are closely fastened togather.Namely facilitate batch production rapid-aligning operation, also make the structure of whole device more closely, more firm.
Stopping payment seat 9 for metal stamping goods, by adjusting punching press amount or the off-position of mould, reaching the advantage of rapid adjustment precompressed amount.Stop payment seat 9 for metal material and make, further, stop payment seat 9 and magnetic conductive material can be adopted to make, magnetic conductive material can increase magnetic flux efficiency, and prevents the electronic building brick below magnetic flux interference voice coil motor.
The lower end of stopping payment seat 9 is provided with seal cover 10, seal cover 10 is outward extended with edge 11 along its circumference, or at the side of seal cover 10 to being outside equipped with L-type supporting leg (not shown), edge 11 and L-type supporting leg are stop payment the position limiting structure of seat 9 in optical axis direction movement.
Edge 11, between L-type supporting leg and the lower end of base 8 by fluid sealant integrated bond, the lower end of fluid sealant integral sealing edge 11, L-type supporting leg and base 8, to form dust and moisture hermetically-sealed construction, when this dust and moisture hermetically-sealed construction can effectively prevent lens mount 6 from moving, stop payment dust outside seat 9 and foreign matter enters in voice coil motor, drop on image perceptron, and affect imaging.The outline at edge 11 can be set to the shapes such as circle, regular hexagon, square.
In the present invention, can when seat 9 be stopped payment in assembling, its size in the amount of interference 13 of optical axis direction of location adjustment, by the size of the test macro feedback adjustment starting current of voice coil motor, set and stop payment the amount of interference 13 of seat 9 at optical axis direction, this location adjustment mode can increase the consistency of quality effectively, to reach out the requirement of circuit controls.
Claims (9)
1. a Subminiature voice coil motor, is characterized in that, described voice coil motor comprises upper cover, upper spring, enclosing cover, magnet, coil, lens mount, lower spring, base, and described lens mount is clamped by upper spring, lower spring, and coil is fixed on described lens mount; This voice coil motor comprises being fixedly installed on independently stops payment seat between lens mount and base, base inner ring is stretched in this upper end of stopping payment seat, and form the amount of interference of set point, the upper end of stopping payment seat promotes the camber of spring that lens mount moves to make connection on it, and the camber of spring precompression that amount of interference is formed and the external force causing voice coil motor original position to depart from balance each other.
2. voice coil motor as claimed in claim 1, is characterized in that, described in stop payment seat be that metal material is made.
3. voice coil motor as claimed in claim 2, is characterized in that, described in stop payment seat be that magnetic conductive material is made.
4. voice coil motor as claimed in claim 3, is characterized in that, described in stop payment seat be metal stamping goods.
5. voice coil motor as claimed in claim 1, is characterized in that, described in stop payment seat its circumference of lower end edge be outward extended with edge, described edge for described in stop payment the position limiting structure of seat in optical axis direction movement.
6. voice coil motor as claimed in claim 5, is characterized in that, by fluid sealant integrated bond between the lower end of described edge and described base.
7. voice coil motor as claimed in claim 6, it is characterized in that, the lower end of edge and described base described in described fluid sealant integral sealing, to form dust and moisture hermetically-sealed construction.
8. voice coil motor as claimed in claim 5, is characterized in that, the outline at described edge is circle, regular hexagon or square.
9. voice coil motor as claimed in claim 1, is characterized in that, by the size of the test macro feedback adjustment starting current of described voice coil motor, stops payment the described amount of interference of seat at optical axis direction described in setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310129873.8A CN103227549B (en) | 2013-04-15 | 2013-04-15 | A kind of Subminiature voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310129873.8A CN103227549B (en) | 2013-04-15 | 2013-04-15 | A kind of Subminiature voice coil motor |
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| Publication Number | Publication Date |
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| CN103227549A CN103227549A (en) | 2013-07-31 |
| CN103227549B true CN103227549B (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310129873.8A Active CN103227549B (en) | 2013-04-15 | 2013-04-15 | A kind of Subminiature voice coil motor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414308B (en) * | 2013-08-27 | 2015-02-04 | 宜兴市贵鑫磁电高科技有限公司 | Voice coil motor |
| CN105699898B (en) * | 2016-04-14 | 2018-08-17 | 昆山丘钛微电子科技有限公司 | VCM motor floats high test device and test method |
| CN105915019A (en) * | 2016-04-29 | 2016-08-31 | 东莞市东勤电子有限公司 | Voice coil motor and assembly technology thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750699A (en) * | 2008-12-11 | 2010-06-23 | 鸿富锦精密工业（深圳）有限公司 | Lens module |
| CN101488698B (en) * | 2009-02-23 | 2014-09-10 | 李俊 | Voice coil type focus motor |
| CN101958598B (en) * | 2009-07-15 | 2013-08-28 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor assembly |
| KR101788319B1 (en) * | 2011-01-13 | 2017-11-15 | 엘지이노텍 주식회사 | Voice coil motor |
| CN102820759B (en) * | 2011-06-08 | 2016-01-06 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor and taken module |
| CN103138522B (en) * | 2011-11-23 | 2017-06-23 | 赛恩倍吉科技顾问（深圳）有限公司 | Voice coil motor and the camera module using the voice coil motor |
| CN202758123U (en) * | 2012-07-12 | 2013-02-27 | 瑞声声学科技(苏州)有限公司 | Lens driving device |
| CN203056814U (en) * | 2013-04-15 | 2013-07-10 | 宜兴市贵鑫磁电高科技有限公司 | Ultraminiature voice coil motor |
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2013
- 2013-04-15 CN CN201310129873.8A patent/CN103227549B/en active Active
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| CN103227549A (en) | 2013-07-31 |
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