CN108196352A - A kind of method using actuator exact focus - Google Patents
A kind of method using actuator exact focus Download PDFInfo
- Publication number
- CN108196352A CN108196352A CN201810135205.9A CN201810135205A CN108196352A CN 108196352 A CN108196352 A CN 108196352A CN 201810135205 A CN201810135205 A CN 201810135205A CN 108196352 A CN108196352 A CN 108196352A
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- China
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- movable frame
- pedestal
- actuator
- fixed
- sma wire
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Abstract
The invention discloses a kind of method using actuator exact focus, including step：Step A, actuator is set, the actuator includes pedestal, fixed frame, movable frame and driving unit, the fixed frame is fixedly arranged on the pedestal, and the movable frame is contained in the fixed frame and is carried on the pedestal, the movable frame include one towards the pedestal supporting surface；The driving unit includes SMA wire, controller, position sensor and guide bar；The both ends of the SMA wire are fixed on the fixed frame, and the SMA wire includes the bending part between the both ends, and the bending part is contradicted with the supporting surface, and the guide bar passes through the movable frame and is fixed on the pedestal；The controller is additionally operable to adjust the size of the electric current according to the sensing result；Step B, preliminary zoom；Step C, accurate zoom.This method improves focusing precision.
Description
The application is application No. is 2012102330469, and the applying date is on 07 06th, 2012, and invention and created name is
The divisional application of the patent of " actuator and the camera model with the actuator ".
Technical field
The present invention relates to imaging field more particularly to a kind of methods using actuator exact focus.
Background technology
With the fast development of mechanics of communication, camera model is widely used in the portable electronics such as mobile phone by people and sets
In standby.In order to improve the picture quality captured by camera model, camera model generally all has zoom function, and has and can drive
Camera model carries out the actuator of zoom.
There are many actuator in prior art, one of which actuator is marmem (Shape Memory
Alloy, SMA) actuator, however, the focusing precision of shape memory alloy actuator is not high.
Invention content
In view of this, it is necessary to which a kind of actuator of achievable exact focus and the camera mould with the actuator are provided
Block.
A kind of actuator, including pedestal, fixed frame, movable frame and driving unit.The fixed frame is fixedly arranged on described
On pedestal, the movable frame is contained in the fixed frame and is carried on the pedestal.The movable frame includes one towards institute
State the supporting surface of pedestal.The driving unit includes SMA wire, controller, position sensor and guide bar.The two of the SMA wire
End is fixed on the fixed frame, and the SMA wire includes the bending part between the both ends, and the bending part is supported with described
Face contradicts, and the guide bar passes through the movable frame and is fixed on the pedestal.The controller heats for applying electric current
SMA wire drives the movable frame to be moved along the guide bar to change the length of SMA wire.The position sensor is used to sense
Sensing result is simultaneously transmitted to the controller by the position of the movable frame.The controller is additionally operable to according to the sensing result
Adjust the size of the electric current.
A kind of camera model, including actuator and lens unit as described above, the lens unit is contained in described
In movable frame.
Compared to prior art, the actuator and the camera model have position sensor simultaneously can be according to position sensing
The sensing result adjustment control electric current of device, so as to improve focusing precision.
Description of the drawings
Fig. 1 is the stereoscopic schematic diagram of camera model provided by the invention.
Fig. 2 is the decomposition diagram of the camera model in Fig. 1.
Fig. 3 is the III-III of the camera model in Fig. 1 to sectional view.
Specific embodiment
It please refers to Fig.1 to Fig.3, is the camera model 100 of an embodiment of the present invention.The camera model 100 includes causing
Dynamic device 200 and lens unit 15.It is single that the actuator 200 includes pedestal 10, shrapnel 11, fixed frame 12, movable frame 14 and driving
Member 16.
The pedestal 10 is substantially in tabular.The center of the pedestal 10 offers circular light hole 101.It is described
Pedestal 10 includes upper surface 102.One corner of the upper surface 102 is formed with protrusive board 103, is formed on the protrusive board 103
There is pillar 104.Another corner of the upper surface 102 opposite with the pillar 104 forms a mounting hole 105.On described
It is formed with positioning column 106 and location hole 107 respectively at other two corner on surface 104.
The shrapnel 11 is in round, and the internal diameter of shrapnel 11 is more than the diameter of light hole 101.It is symmetrically formed on the shrapnel 11
There are two lugs 111, a through-hole 112 is formed on each lug 111.
The 12 substantially square tubular of fixed frame, it is adjacent to each other including two the first side walls 120 and two adjacent to each other
Second sidewall 121.Holding tank 122 is formed on the first side wall 120.The first side wall 120 and the second sidewall 121
Between corner madial wall on be formed with sliding slot 123.Pillar there are two being formed on the outer surface of each second sidewall 121
124 and a holding tank 125.The pillar 124 extends close to the first side wall 120, the holding tank 125 from the pillar 124
To another second sidewall 121.The lower part of corner between two second sidewalls 121 is formed with bit-avoiding slot 126, and top is formed with
Receiving hole 127, receiving hole 127 are stepped hole.It is also formed with swashing at pillar 124 on the outer surface of each second sidewall 121
Light straight forming line (LDS, Laser Direct Structuring) 128, each LDS lines 128 are extended to from second sidewall 121
Corresponding the first side wall 120.The location hole and correspondence of corresponding pedestal upper positioning column 106 are formed on the bottom surface of the fixed frame 12
The positioning column (not shown) of location hole 107.
The 14 generally circular tubular of movable frame, the interior receiving lens unit 15 of movable frame 14, in the present embodiment, mirror
Head unit 15 and movable frame 14 are fixed together in a manner that screw thread is spirally connected.Lens unit 15 includes lens barrel 150 and is contained in
Eyeglass 151 in lens barrel 150.Two sliding blocks 141 relative to each other are formed on the outer surface 140 of movable frame 14, one, which is located at two, slides
142 and one holding tank 143 opposite with lug 142 of arc step shape lug between block 141.One side is formed on lug 142
To the supporting surface 144 of pedestal 10.A ladder hole 145 is formed in lug 142.
The driving unit 16 includes circuit board 160, controller 161, the position sensor being installed on circuit board 160
162nd, magnet 163, two resistance clamping pieces 164, a shape memory alloy wire (Shape Memory Alloy, SMA) 165, one are led
Draw 166 and one elastic component 170 of bar.Wherein, in the present embodiment, position sensor 162 is Hall magnetic sensor.Resistance
Clamping piece 164 is metallic conduction shrapnel, the holding tank 167 that is formed through metal bending is formed on resistance clamping piece 164 and through gold
Belong to the plumb joint 168 extended to form, mounting hole 169 is also formed on resistance clamping piece 164.Elastic component 170 is spring.
Upon assembly, shrapnel 11 is placed on pedestal 10 so that pillar 104 passes through a through-hole 112 of shrapnel 11, guide bar
166 pass through another through-hole 112 of shrapnel 11 to enter in the mounting hole 105 of pedestal 10, so as to which shrapnel 11 is fixed on pedestal 10；
Magnet 163 is fixed on by adhesive type in the holding tank 143 of movable frame 14, movable frame 14 is fixed on bullet by adhesive means
On piece 11 so that guide bar 166 passes through the ladder hole 145 on the lug 142 of movable frame 14, and elastic component 170 is placed on guide bar
On 166,170 part of elastic component is placed in ladder hole 145；Fixed frame 12 is placed on pedestal 10 so that sliding block 141 is placed in
In sliding slot 123, lug 142 is placed in bit-avoiding slot 126, and guide bar 166 passes through receiving hole 127, by adhesive means by fixed frame
12 are fixed on pedestal 10；Two resistance clamping pieces 164 are fixed on fixed frame 12 by the cooperation of mounting hole 169 and pillar 124
On, the plumb joint 168 of resistance clamping piece 164 is connect by the method for welding with LDS lines 128；SMA wire 165 is placed in fixed frame
In 12 holding tank 125, the both ends of SMA wire 165 are clamped in respectively in the holding tank 167 of resistance clamping piece 164,165 liang of SMA wire
Part bending between end bypasses the lug 142 of movable frame 14 and is contradicted with supporting surface 144；Circuit board 160 is fixed on fixation
On frame 12, position sensor 162 passes through holding tank 122 opposite with magnet 163, and circuit board 160 passes through welding manner and LDS lines
128 connections, so as to the assembling of finish actuator 200.
When start, controller 161 provide driving current, drive current through LDS lines 128, resistance clamping piece 164 and add
Hot SMA wire 165, SMA wire 165 is heated to be shortened, so as to which movable frame 14 be driven to be moved to the direction far from pedestal 10, so as to complete to become
It is burnt.Due to the limitation of guide bar 166 and through-hole 145 so that movable frame 14 can only be moved along the direction that guide bar 166 extends,
So as to which the present invention only needs movable frame 14 can be driven to complete zoom using a SMA wire.
The length and temperature that SMA wire 165 is shunk have correspondence, however, due to the influence of environment temperature, even if giving
SMA wire 165 applies identical driving current, and the degree difference that SMA wire 165 is heated is also resulted in environment temperature difference,
The degree difference shunk so as to SMA wire 165.In order to realize accurate zoom, present invention uses position sensors 162.Movable
In the moving process of frame 14, position sensor 162 senses the change of magnetic field strength for being fixed on the magnet 163 in movable frame 14, from
And the change in location of movable frame 14 being sensed, and result is returned into controller 161, controller 161 is adjusted according to sensing result and is driven
Streaming current, so as to fulfill exact focus.For example, when the distance that movable frame 14 moves is more than preset distance, controller 161 is reduced
Driving current, so that SMA wire 165 is elongated, so as to which movable frame 14 be controlled to be moved to preset distance；When by the scheduled time
When movable frame 14 has not moved into preset distance, controller 161 increases driving current, so that SMA wire 165 further contracts
It is short, so as to which movable frame 14 be controlled to be moved to preset distance.
When movable frame 14 is to far from the movement of 10 direction of pedestal, 11 applied elongation of shrapnel, 170 forced compression of elastic component.When
When controller 161 stops providing driving current, the cooling elongation of SMA wire 165,170 elastic recovery of shrapnel 11 and elastic component, so as to drive
Movable frame 14 is made to return to initial position.
It is appreciated that the fixed frame 12 is not limited to present embodiment is fixedly arranged on the pedestal 10 by glued mode
On, it can also be fixedly arranged on by snap fit on the pedestal 10.
It is appreciated that the position sensor 162 is not limited to the Hall magnetic sensor of present embodiment, may be used also
To be other types of position sensor, such as photoelectrical position sensor.
In short, those skilled in the art it should be appreciated that more than embodiment be intended merely to illustrate this
Invention, and be not used as limitation of the invention, as long as within the spirit of the present invention, to above example institute
The appropriate change and variation made all is fallen within the scope of protection of present invention.
Claims (7)
- A kind of 1. method using actuator exact focus, which is characterized in that including step：Step A, actuator is set, the actuator includes pedestal, fixed frame, movable frame and driving unit, the fixed frame It is fixedly arranged on the pedestal, the movable frame is contained in the fixed frame and is carried on the pedestal, the movable frame packet Include one towards the pedestal supporting surface；The driving unit includes SMA wire, controller, position sensor and guide bar；It is described The both ends of SMA wire are fixed on the fixed frame, and the SMA wire includes the bending part between the both ends, the bending part It is contradicted with the supporting surface, the guide bar passes through the movable frame and is fixed on the pedestal；The controller is used to apply Electric current heating SMA wire is added the movable frame to be driven to be moved along the guide bar to change the length of SMA wire；The position sensing Device is used to sense the position of the movable frame and sensing result is transmitted to the controller；The controller is additionally operable to according to institute State the size that sensing result adjusts the electric current；The position sensor is fixed on the fixed frame, the position sensor For Hall magnetic sensor, the driving unit further includes magnetic in the movable frame and opposite with the position sensor Iron；The driving unit further includes resistance clamping piece, and the resistance clamping piece is fixed on the fixed frame, the SMA wire The both ends are held on the resistance clamping piece；Step B, preliminary zoom makes controller provide driving current, drives current through resistance clamping piece and heat SMA wire, SMA Line is heated shortening, and movable frame is made to be moved along the direction that guide bar extends, so as to which movable frame be driven to be moved to the direction far from pedestal It is dynamic, so as to complete preliminary zoom；Step C, accurate zoom, in the moving process of movable frame, position sensor sensing is fixed on the magnet in movable frame Result so as to sense the change in location of movable frame, and is returned to controller by change of magnetic field strength, and controller is according to sensing result Driving current is adjusted, so as to fulfill exact focus.
- 2. the method according to claim 1 using actuator exact focus, which is characterized in that the step C is further included： When the distance of movable frame movement is more than preset distance, controller is made to reduce driving current, so that SMA wire is elongated, so as to Control movable frame is moved to preset distance；When having not moved into preset distance by scheduled time movable frame, make control Device increases driving current, so that SMA wire further shortens, so as to which movable frame be controlled to be moved to preset distance.
- 3. the method for actuator exact focus is used as described in claim 1, which is characterized in that the fixed frame is by gluing Mode is fixedly arranged on the pedestal.
- 4. the method for actuator exact focus is used as described in claim 1, which is characterized in that the actuator further includes one Connect the shrapnel of the pedestal and the movable frame.
- 5. the method for actuator exact focus is used as described in claim 1, which is characterized in that the guide bar is far from described One end of pedestal passes through the fixed frame.
- 6. the method for actuator exact focus is used as claimed in claim 5, which is characterized in that be cased with bullet on the guide bar Property part, the elastic component support the fixed frame and the movable frame respectively.
- 7. the method for actuator exact focus is used as described in claim 1, which is characterized in that the resistance clamping piece and institute Controller is stated to connect by laser direct forming line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810135205.9A CN108196352A (en) | 2012-07-06 | 2012-07-06 | A kind of method using actuator exact focus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810135205.9A CN108196352A (en) | 2012-07-06 | 2012-07-06 | A kind of method using actuator exact focus |
| CN201210233046.9A CN103529536B (en) | 2012-07-06 | 2012-07-06 | Actuator and the camera model with the actuator |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210233046.9A Division CN103529536B (en) | 2012-07-06 | 2012-07-06 | Actuator and the camera model with the actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108196352A true CN108196352A (en) | 2018-06-22 |
Family
ID=49931680
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210233046.9A Active CN103529536B (en) | 2012-07-06 | 2012-07-06 | Actuator and the camera model with the actuator |
| CN201810135205.9A Pending CN108196352A (en) | 2012-07-06 | 2012-07-06 | A kind of method using actuator exact focus |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210233046.9A Active CN103529536B (en) | 2012-07-06 | 2012-07-06 | Actuator and the camera model with the actuator |
Country Status (1)
| Country | Link |
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| CN (2) | CN103529536B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174740A (en) * | 2019-06-01 | 2019-08-27 | 瑞声科技(新加坡)有限公司 | Lens assembly |
| CN110261987A (en) * | 2019-06-01 | 2019-09-20 | 瑞声科技(新加坡)有限公司 | Lens assembly |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9791713B2 (en) * | 2014-07-24 | 2017-10-17 | Lg Innotek Co., Ltd. | Lens moving apparatus |
| KR102249681B1 (en) * | 2014-11-12 | 2021-05-10 | 액추에이터 솔루션스 게엠베하 | Camera module autofocus actuator and control method thereof |
| CN107272138B (en) * | 2016-04-01 | 2020-09-15 | 台湾东电化股份有限公司 | Lens driving mechanism and control method thereof |
| WO2017181387A1 (en) * | 2016-04-21 | 2017-10-26 | 深圳市大疆创新科技有限公司 | Unmanned aircraft and camera assembly |
| KR102505436B1 (en) * | 2016-06-17 | 2023-03-03 | 삼성전기주식회사 | Apparatus for controlling position of lens module and camera module including the same |
| CN109475266B (en) * | 2016-07-11 | 2021-08-10 | 奥林巴斯株式会社 | Endoscope device |
| CN108627947B (en) * | 2018-06-26 | 2024-01-30 | 惠州萨至德光电科技有限公司 | Lens driving device |
| CN112887521B (en) * | 2019-11-30 | 2022-07-26 | 华为技术有限公司 | Camera module and electronic equipment |
| CN114721107A (en) * | 2022-05-16 | 2022-07-08 | 上海信迈电子科技有限公司 | Optical element driving device, image pickup device, and mobile terminal |
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| CN101910903A (en) * | 2008-01-15 | 2010-12-08 | 柯尼卡美能达精密光学株式会社 | Driving device made of shape-memory alloy |
| US20110141584A1 (en) * | 2009-12-10 | 2011-06-16 | New Scale Technologies | Lens actuator module |
| CN102207603A (en) * | 2010-03-29 | 2011-10-05 | 精工电子有限公司 | Drive module and electronic device |
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2012
- 2012-07-06 CN CN201210233046.9A patent/CN103529536B/en active Active
- 2012-07-06 CN CN201810135205.9A patent/CN108196352A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101910903A (en) * | 2008-01-15 | 2010-12-08 | 柯尼卡美能达精密光学株式会社 | Driving device made of shape-memory alloy |
| US20110141584A1 (en) * | 2009-12-10 | 2011-06-16 | New Scale Technologies | Lens actuator module |
| CN102207603A (en) * | 2010-03-29 | 2011-10-05 | 精工电子有限公司 | Drive module and electronic device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174740A (en) * | 2019-06-01 | 2019-08-27 | 瑞声科技(新加坡)有限公司 | Lens assembly |
| CN110261987A (en) * | 2019-06-01 | 2019-09-20 | 瑞声科技(新加坡)有限公司 | Lens assembly |
| CN110174740B (en) * | 2019-06-01 | 2022-03-08 | 瑞声光学解决方案私人有限公司 | Lens assembly |
| CN110261987B (en) * | 2019-06-01 | 2022-10-25 | 瑞声光学解决方案私人有限公司 | Lens assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103529536B (en) | 2018-05-08 |
| CN103529536A (en) | 2014-01-22 |
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Application publication date: 20180622 |