CN103529536A - Actuator and camera module provided with actuator - Google Patents
Actuator and camera module provided with actuator Download PDFInfo
- Publication number
- CN103529536A CN103529536A CN201210233046.9A CN201210233046A CN103529536A CN 103529536 A CN103529536 A CN 103529536A CN 201210233046 A CN201210233046 A CN 201210233046A CN 103529536 A CN103529536 A CN 103529536A
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- China
- Prior art keywords
- movable frame
- actuator
- base
- fixed mount
- controller
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Abstract
The invention relates to an actuator including a base, a fixing frame, a movable frame and a drive unit. The fixing frame is fixedly arranged on the base. The movable frame is accommodated in the fixing frame and loaded on the base. The movable frame includes an abutting face which faces the base. The drive unit includes an SMA wire, a controller, a position sensor and a guide rod. The SMA wire includes a bending part arranged between two ends, wherein the bending part contacts the abutting face. The guide rod passes through the movable frame and is fixed on the base. The controller is used for applying current to heat the SMA wire and change the length of the SMA wire so as to drive the movable frame to move along the guide rod. The position sensor is used for sensing the position of the movable frame and transmitting the sensing result to the controller. The controller is also used for adjusting the size of the current according to the sensing result.
Description
Technical field
The present invention relates to imaging field, relate in particular to a kind of actuator and there is the camera model of this actuator.
Background technology
Along with the fast development of mechanics of communication, camera model is widely used in the portable electric appts such as mobile phone by people.In order to improve the captured picture quality of camera model, camera model generally all has zoom function, and has the actuator that can drives camera module carries out zoom.
In prior art, have multiple actuator, wherein a kind of actuator is marmem (Shape Memory Alloy, SMA) actuator, yet the focusing precision of shape memory alloy actuator is not high.
Summary of the invention
In view of this, be necessary to provide a kind of camera model of realizing the actuator of accurate focusing and thering is this actuator.
, it comprises base, fixed mount, movable frame and driver element.Described fixed mount is fixedly arranged on described base, and described movable frame is contained in described fixed mount and is carried on described base.Described movable frame comprises a supporting surface towards described base.Described driver element comprises SMA line, controller, position transducer and guide bar.The two ends of described SMA line are fixed on described fixed mount, and described SMA line comprises the kink between these two ends, and described kink and described supporting surface are conflicted, and described guide bar passes described movable frame and is fixed on described base.Described controller moves along described guide bar to order about described movable frame to change the length of SMA line for applying current flow heats SMA line.Described position transducer is for the position of movable frame described in sensing and sensing result is sent to described controller.Described controller is also for adjusting the size of described electric current according to described sensing result.
, it comprises actuator and lens unit as mentioned above, described lens unit is contained in described movable frame.
Compared to prior art, described actuator and described camera model have position transducer and can control electric current according to the sensing result adjustment of position transducer, thereby have improved focusing precision.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of camera model provided by the invention.
Fig. 2 is the decomposing schematic representation of the camera model in Fig. 1.
Fig. 3 is that the III-III of the camera model in Fig. 1 is to cut-open view.
Primary clustering symbol description
| |
100 |
| |
200 |
| |
10 |
| Light hole | 101 |
| Upper surface | 102 |
| Flange | 103 |
| Projection | 104 |
| Fixed orifice | 105 |
| Reference column | 106 |
| Pilot hole | 107 |
| |
11 |
| Lug | 111 |
| Through hole | 112 |
| Fixed |
12 |
| The first side wall | 120 |
| The second sidewall | 121 |
| Holding tank | 122 |
| Chute | 123 |
| Projection | 124 |
| Holding tank | 125 |
| Bit-avoiding slot | 126 |
| Accommodation hole | 127 |
| Laser direct forming line (LDS line) | 128 |
| |
14 |
| Outside surface | 140 |
| Slide block | 141 |
| Lug | 142 |
| Holding tank | 143 |
| Supporting surface | 144 |
| Through hole | 145 |
| |
15 |
| |
150 |
| |
151 |
| Driver element | 16 |
| Circuit board | 160 |
| |
161 |
| |
162 |
| |
163 |
| Resistance holder | 164 |
| Marmem line (SMA line) | 165 |
| |
166 |
| Holding tank | 167 |
| Soldered joint | 168 |
| Fixed orifice | 169 |
| |
170 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Referring to Fig. 1 to Fig. 3, is the camera model 100 of an embodiment of the present invention.Described camera model 100 comprises actuator 200 and lens unit 15.Described actuator 200 comprises base 10, shell fragment 11, fixed mount 12, movable frame 14 and driver element 16.
Described base 10 is roughly tabular.The center of described base 10 offers circular light hole 101.Described base 10 comprises upper surface 102.A corner of described upper surface 102 is formed with flange 103, on described flange 103, is formed with projection 104.Another corner of the described upper surface 102 relative with described projection 104 forms a fixed orifice 105.Other two corners of described upper surface 104 are formed with respectively reference column 106 and pilot hole 107.
Described shell fragment 11 is round, and the internal diameter of shell fragment 11 is greater than the diameter of light hole 101.On described shell fragment 11, be symmetrically formed two lugs 111, on each lug 111, formed a through hole 112.
Described fixed mount 12 tubular that is roughly square, comprises the second sidewall 121 that two the first side walls that are adjacent to each other 120 and two are adjacent to each other.On described the first side wall 120, be formed with holding tank 122.On corner madial wall between described the first side wall 120 and described the second sidewall 121, be formed with chute 123.Described in each, on the outside surface of the second sidewall 121, be formed with two projections 124 and a holding tank 125.Described projection 124 is near the first side wall 120, and described holding tank 125 extends to another the second sidewall 121 from described projection 124.The bottom of the corner between two the second sidewalls 121 is formed with bit-avoiding slot 126, and top is formed with accommodation hole 127, and accommodation hole 127 is shoulder hole.On the outside surface of each the second sidewall 121, near projection 124 places, be also formed with laser direct forming line (LDS, Laser Direct Structuring) 128, each LDS line 128 extends to corresponding the first side wall 120 from the second sidewall 121.On the bottom surface of described fixed mount 12, be formed with the reference column (not shown) of pilot hole and the corresponding pilot hole 107 of reference column 106 on corresponding base.
Described movable frame 14 is rounded tubular roughly, accommodates lens unit 15 in movable frame 14, and in the present embodiment, the mode that lens unit 15 and movable frame 14 are spirally connected by screw thread is fixed together.Lens unit 15 comprises lens barrel 150 and is contained in the eyeglass 151 in lens barrel 150.On the outside surface 140 of movable frame 14, be formed with the stepped lug 142 of the arc of two slide blocks 141, respect to one another between two slide blocks 141, the holding tank 143 relative with lug 142 with.On lug 142, be formed with a supporting surface 144 towards base 10.In lug 142, be formed with a ladder hole 145.
Described driver element 16 comprises circuit board 160, is installed on controller 161, position transducer 162, magnet 163, two resistance holders 164, a marmem line (Shape Memory Alloy, SMA) 165, one guide bar 166 and an elastic component 170 on circuit board 160.Wherein, in the present embodiment, position transducer 162 is Hall magnetic sensor.Resistance holder 164 is metallic conduction shell fragment, is formed with the holding tank 167 forming through metal bending and the soldered joint 168 extending to form through metal on resistance holder 164, is also formed with fixed orifice 169 on resistance holder 164.Elastic component 170 is spring.
When assembling, shell fragment 11 is placed on base 10, make projection 104 through a through hole 112 of shell fragment 11, guide bar 166 enters in the fixed orifice 105 of base 10 through another through hole 112 of shell fragment 11, thereby shell fragment 11 is fixed on base 10; Magnet 163 is fixed in the holding tank 143 of movable frame 14 by adhesive type, movable frame 14 is fixed on shell fragment 11 by adhesive means, make guide bar 166 through the ladder hole 145 on the lug 142 of movable frame 14, elastic component 170 is placed on guide bar 166, being placed in ladder hole 145 of elastic component 170 parts; Fixed mount 12 is placed on base 10, slide block 141 is placed in chute 123, lug 142 is placed in bit-avoiding slot 126, and guide bar 166, through accommodation hole 127, is fixed on fixed mount 12 on base 10 by adhesive means; By two resistance holders 164, by being fixed on fixed mount 12 of fixed orifice 169 and projection 124, the soldered joint 168 of resistance holder 164 is connected with LDS line 128 by the method for welding; SMA line 165 is placed in the holding tank 125 of fixed mount 12, the two ends of SMA line 165 are clamped in respectively in the holding tank 167 of resistance holder 164, and the part bending between SMA line 165 two ends is walked around the lug 142 of movable frame 14 and conflicted with supporting surface 144; Circuit board 160 is fixed on fixed mount 12, and position transducer 162 is relative with magnet 163 through holding tank 122, and circuit board 160 is connected with LDS line 128 by welding manner, thus the assembling of finish actuator 200.
When start, controller 161 provides drive current, and drive current heat SMA line 165 by LDS line 128, resistance holder 164, SMA line 165 shortening of being heated, thus driving movable frame 14 moves to the direction away from base 10, thus complete zoom.Due to the restriction of guide bar 166 and through hole 145, the direction that movable frame 14 can only be extended along guide bar 166 moves, thereby the present invention only need to use a SMA line can drive movable frame 14 to complete zoom.
Length and temperature that SMA line 165 shrinks have corresponding relation, yet, due to the impact of environment temperature, even if apply identical drive current to SMA line 165, when environment temperature is different, also can cause the heated degree of SMA line 165 different, thereby the degree that SMA line 165 shrinks is different.In order to realize accurate zoom, the present invention has used position transducer 162.In the moving process of movable frame 14, position transducer 162 sensings are fixed on the change of magnetic field strength of the magnet 163 in movable frame 14, thereby the change in location of sensing movable frame 14, and result is returned to controller 161, controller 161 is adjusted drive current according to sensing result, thereby realizes accurately focusing.For example, when the distance moving when movable frame 14 surpasses preset distance, controller 161 reduces drive currents, thereby makes SMA line 165 elongated, thereby control movable frame 14, moves to preset distance; When process predetermined time movable frame 14 does not also move to preset distance, controller 161 increases drive currents, thereby SMA line 165 is further shortened, thereby control movable frame 14, moves to preset distance.
In movable frame 14 when moving away from base 10 directions, shell fragment 11 applied elongation, elastic component 170 is subject to force compresses.When controller 161 stops providing drive current, the cooling elongation of SMA line 165, shell fragment 11 and elastic component 170 elastic recoverys, get back to initial position thereby order about movable frame 14.
Be appreciated that described fixed mount 12 is not limited to present embodiment and is fixedly arranged on described base 10 by gummed mode, can also be fixedly arranged on described base 10 by engaging mode.
Be appreciated that described position transducer 162 is not limited to the Hall magnetic sensor of present embodiment, it can also be the position transducer of other type, for example photoelectrical position sensor.
In a word; those skilled in the art will be appreciated that; above embodiment is only for the present invention is described; and be not used as limitation of the invention; as long as within connotation scope of the present invention, within the appropriate change that above embodiment is done and variation all drop on the scope of protection of present invention.
Claims (10)
1. an actuator, it comprises base, fixed mount, movable frame and driver element, and described fixed mount is fixedly arranged on described base, and described movable frame is contained in described fixed mount and is carried on described base, its improvement is, described movable frame comprises a supporting surface towards described base; Described driver element comprises SMA line, controller, position transducer and guide bar; The two ends of described SMA line are fixed on described fixed mount, and described SMA line comprises the kink between these two ends, and described kink and described supporting surface are conflicted, and described guide bar passes described movable frame and is fixed on described base; Described controller moves along described guide bar to order about described movable frame to change the length of SMA line for applying current flow heats SMA line; Described position transducer is for the position of movable frame described in sensing and sensing result is sent to described controller; Described controller is also for adjusting the size of described electric current according to described sensing result.
2. actuator as claimed in claim 1, wherein, described fixed mount is fixedly arranged on described base by gummed mode.
3. actuator as claimed in claim 1, wherein, described actuator also comprises the shell fragment of the described base of a connection and described movable frame.
4. actuator as claimed in claim 1, wherein, described guide bar away from one end of described base through described fixed mount.
5. actuator as claimed in claim 4, wherein, overlaps flexible on described guide bar, and described elastic component supports respectively described fixed mount and described movable frame.
6. actuator as claimed in claim 1, wherein, described position transducer is fixed on described fixed mount, and described position transducer is Hall magnetic sensor, and described driver element also comprises and is positioned in described movable frame and the magnet relative with described position transducer.
7. actuator as claimed in claim 1, wherein, described driver element also comprises resistance holder, and described resistance holder is fixed on described fixed mount, and these two ends of described SMA line are held on described resistance holder.
8. actuator as claimed in claim 7, wherein, described electronic clip gripping member is connected by laser direct forming line with described controller.
9. a camera model, it comprises actuator and lens unit as claimed in claim 1, described lens unit is contained in described movable frame.
10. camera model as claimed in claim 9, wherein, described lens unit comprises lens barrel and is contained in the interior eyeglass of described lens barrel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210233046.9A CN103529536B (en) | 2012-07-06 | 2012-07-06 | Actuator and the camera model with the actuator |
| CN201810135205.9A CN108196352A (en) | 2012-07-06 | 2012-07-06 | A kind of method using actuator exact focus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210233046.9A CN103529536B (en) | 2012-07-06 | 2012-07-06 | Actuator and the camera model with the actuator |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810135205.9A Division CN108196352A (en) | 2012-07-06 | 2012-07-06 | A kind of method using actuator exact focus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103529536A true CN103529536A (en) | 2014-01-22 |
| CN103529536B CN103529536B (en) | 2018-05-08 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810135205.9A Pending CN108196352A (en) | 2012-07-06 | 2012-07-06 | A kind of method using actuator exact focus |
| CN201210233046.9A Active CN103529536B (en) | 2012-07-06 | 2012-07-06 | Actuator and the camera model with the actuator |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810135205.9A Pending CN108196352A (en) | 2012-07-06 | 2012-07-06 | A kind of method using actuator exact focus |
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| Country | Link |
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| CN (2) | CN108196352A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301733A (en) * | 2014-07-24 | 2016-02-03 | Lg伊诺特有限公司 | Lens moving apparatus |
| CN107079090A (en) * | 2016-04-21 | 2017-08-18 | 深圳市大疆创新科技有限公司 | Unmanned plane and camera assembly |
| CN107111212A (en) * | 2014-11-12 | 2017-08-29 | 艾斯科技公司 | Camera module auto-focusing actuator and its control method |
| CN107272138A (en) * | 2016-04-01 | 2017-10-20 | 台湾东电化股份有限公司 | Lens driving mechanism and control method thereof |
| CN107528997A (en) * | 2016-06-17 | 2017-12-29 | 三星电机株式会社 | Camera lens module position control and the camera model comprising the control device |
| CN108627947A (en) * | 2018-06-26 | 2018-10-09 | 惠州大亚湾三美达光学技术有限公司 | Lens driver |
| CN109475266A (en) * | 2016-07-11 | 2019-03-15 | 奥林巴斯株式会社 | Endoscope apparatus |
| WO2021104017A1 (en) * | 2019-11-30 | 2021-06-03 | 华为技术有限公司 | Camera module and electronic device |
| 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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020243862A1 (en) * | 2019-06-01 | 2020-12-10 | 瑞声光学解决方案私人有限公司 | Lens assembly |
| WO2020243855A1 (en) * | 2019-06-01 | 2020-12-10 | 瑞声光学解决方案私人有限公司 | Lens assembly |
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| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4539784B2 (en) * | 2008-01-15 | 2010-09-08 | コニカミノルタオプト株式会社 | Shape memory alloy drive unit |
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2012
- 2012-07-06 CN CN201810135205.9A patent/CN108196352A/en active Pending
- 2012-07-06 CN CN201210233046.9A patent/CN103529536B/en active Active
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| 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 (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11442286B2 (en) | 2014-07-24 | 2022-09-13 | Lg Innotek Co., Ltd. | Lens moving apparatus |
| CN105301733A (en) * | 2014-07-24 | 2016-02-03 | Lg伊诺特有限公司 | Lens moving apparatus |
| CN112198618B (en) * | 2014-07-24 | 2023-08-22 | Lg伊诺特有限公司 | Lens moving device |
| US10216003B2 (en) | 2014-07-24 | 2019-02-26 | Lg Innotek Co., Ltd. | Lens moving apparatus |
| CN105301733B (en) * | 2014-07-24 | 2020-10-30 | Lg伊诺特有限公司 | Lens moving device |
| US10564443B2 (en) | 2014-07-24 | 2020-02-18 | Lg Innotek Co., Ltd. | Lens moving apparatus |
| CN112198618A (en) * | 2014-07-24 | 2021-01-08 | Lg伊诺特有限公司 | Lens moving device |
| CN107111212A (en) * | 2014-11-12 | 2017-08-29 | 艾斯科技公司 | Camera module auto-focusing actuator and its control method |
| CN107111212B (en) * | 2014-11-12 | 2019-11-12 | 艾斯科技公司 | Camera module auto-focusing actuator and its control method |
| CN107272138A (en) * | 2016-04-01 | 2017-10-20 | 台湾东电化股份有限公司 | Lens driving mechanism and control method thereof |
| CN107079090A (en) * | 2016-04-21 | 2017-08-18 | 深圳市大疆创新科技有限公司 | Unmanned plane and camera assembly |
| 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 |
| CN107079090B (en) * | 2016-04-21 | 2019-03-08 | 深圳市大疆创新科技有限公司 | Unmanned plane and camera assembly |
| CN107528997A (en) * | 2016-06-17 | 2017-12-29 | 三星电机株式会社 | Camera lens module position control and the camera model comprising the control device |
| CN107528997B (en) * | 2016-06-17 | 2020-07-07 | 三星电机株式会社 | Lens module position control device |
| CN109475266B (en) * | 2016-07-11 | 2021-08-10 | 奥林巴斯株式会社 | Endoscope device |
| CN109475266A (en) * | 2016-07-11 | 2019-03-15 | 奥林巴斯株式会社 | Endoscope apparatus |
| CN108627947A (en) * | 2018-06-26 | 2018-10-09 | 惠州大亚湾三美达光学技术有限公司 | Lens driver |
| CN108627947B (en) * | 2018-06-26 | 2024-01-30 | 惠州萨至德光电科技有限公司 | Lens driving device |
| WO2021104017A1 (en) * | 2019-11-30 | 2021-06-03 | 华为技术有限公司 | Camera module and electronic device |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108196352A (en) | 2018-06-22 |
| CN103529536B (en) | 2018-05-08 |
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