CN109752815A - Ultra-thin voice coil motor and camera - Google Patents
Ultra-thin voice coil motor and camera Download PDFInfo
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- CN109752815A CN109752815A CN201910065933.1A CN201910065933A CN109752815A CN 109752815 A CN109752815 A CN 109752815A CN 201910065933 A CN201910065933 A CN 201910065933A CN 109752815 A CN109752815 A CN 109752815A
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- 230000003287 optical effect Effects 0.000 claims description 51
- 230000006641 stabilisation Effects 0.000 claims description 43
- 238000011105 stabilization Methods 0.000 claims description 43
- 230000005291 magnetic effect Effects 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 abstract description 12
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 27
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
本发明涉及摄像头驱动装置技术领域，具体涉及一种超薄音圈马达及摄像头。超薄音圈马达包括壳体、支架、镜头座、第一动子、第二动子和定子，支架可相对所述壳体移动的设置在所述壳体内；镜头座可相对所述支架移动的与所述支架连接，用于安装镜头；第一动子固定设置在所述镜头座上，所述第一动子移动带动所述镜头座移动；第二动子对应所述第一动子设置在所述支架上，用于驱动所述第一动子移动，所述第二动子移动带动所述支架移动；定子对应所述第二动子的固定设置在所述壳体内，用于驱动所述第二动子移动；所述第二动子位于所述第一动子和所述定子之间。本发明的超薄音圈马达具有结构更加紧凑，高度较低的优点。
The present invention relates to the technical field of camera driving devices, and specifically to an ultra-thin voice coil motor and a camera. The ultra-thin voice coil motor includes a housing, a bracket, a lens mount, a first mover, a second mover and a stator. The bracket is movable relative to the housing and is arranged in the housing; the lens mount is movable relative to the bracket and is connected to the bracket for mounting the lens; the first mover is fixedly arranged on the lens mount, and the movement of the first mover drives the movement of the lens mount; the second mover is arranged on the bracket corresponding to the first mover, and is used to drive the movement of the first mover, and the movement of the second mover drives the movement of the bracket; the stator is fixedly arranged in the housing corresponding to the second mover, and is used to drive the movement of the second mover; the second mover is located between the first mover and the stator. The ultra-thin voice coil motor of the present invention has the advantages of a more compact structure and a lower height.
Description
Technical field
The present invention relates to webcam driver engineering device technique fields, and in particular to a kind of ultra-thin voice coil motor and camera.
Background technique
With the development of science and technology and the demand that is convenient for carrying to mobile phone of consumer, the thickness of mobile phone are more and more thinner.
Pith of the mobile phone camera as mobile phone, the height of mobile phone camera are also lower and lower.Such as China in currently available technology
Patent document CN104460180A discloses the voice coil motor that optical anti-vibration is realized in a kind of open loop translation comprising lens mount, under
Lid, focusing coil, translation coil and magnetite, lens mount are set with focusing coil close to the periphery of lower cover one end, the other end it is outer
It encloses and four translation coils is set evenly and at intervals, magnetite is provided with 4 pieces, is arranged in correspondence with respectively with translation coil position in magnetic
On four inner walls of yoke, the polarity towards focusing coil side is identical.When coil of focusing is powered, magnetite generates lens mount
The active force of one parallel optical axis is moved forward and backward lens mount along optical axis direction, when translating coil energization, translates coil to mirror
Headstock integrally generates the active force perpendicular to plane where optical axis together with focusing coil, makes lens mount and focusing coil and plastic cement branch
Frame is integrally planar being translated perpendicular to optical axis.The voice coil motor of above patent document, magnetite and translation coil point
Wei Yu not focus coil optical axis direction side, voice coil motor have in the direction of the optical axis setting magnetite and translation coil and
The space of focusing coil, so that the height of voice coil motor is higher.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming voice coil motor in the prior art is higher-height to lack
It falls into, so that it is more compact to provide a kind of structure, a lower height of ultra-thin voice coil motor, and it is provided with the ultra-thin voice coil motor
Camera.
To solve the above problems, ultra-thin voice coil motor of the invention, including shell, bracket, lens mount, the first mover,
Two movers and stator, bracket can be relative to the mobile settings of the shell in the shell；Lens mount can the relatively described bracket shifting
Dynamic connect with the bracket, for installing camera lens；First mover is fixed on the lens mount, and first mover moves
It is dynamic to drive the lens mount mobile；Second mover corresponds to first mover setting on the bracket, for driving described the
One mover is mobile, and second mover is mobile to drive the bracket mobile；Stator corresponds to being fixed at for second mover
In the shell, for driving second mover mobile；Second mover be located at first mover and the stator it
Between.
The stator, first mover and second mover are arranged along optical axis direction, the middle line of the stator, described
In the same plane, and the plane is perpendicular to the optical axis for the middle line of the middle line of first mover and second mover.
First mover is the focusing coil being mounted on the lens mount lateral wall one week；Second mover is solid
Dingan County's dress magnet on the bracket, the magnet towards the one pendant polar identical of the focusing coil；The stator is
The corresponding spaced stabilization coil of magnet, multiple stabilization coil serial or parallel connections or independent connection.
There are four the magnet and the stabilization coil are respectively correspondingly arranged, the periphery of opposite optical axis is uniformly arranged.
It further include the wiring board that the case inside is set, the focusing coil and the stabilization coil and the route
Partitioned signal connection.
It further include that the corresponding focusing coil and/or the magnet are arranged in the shell, for described in real-time monitoring
The monitoring part of the change in location or change of magnetic field strength of focusing coil and/or the magnet.
The monitoring part is to be arranged in the circuit board, and the corresponding magnet setting incudes the magnet magnetic induction variation
Hall element.
It is fixedly connected between the lens mount and the bracket by first elastic component.
It is fixedly connected between the bracket and the shell by second elastic component.
Camera of the invention has ultra-thin voice coil motor described in any of the above embodiments.
Technical solution of the present invention has the advantages that
1. ultra-thin voice coil motor of the invention, including shell, bracket, lens mount, the first mover, the second mover and stator,
Bracket can be relative to the mobile setting of the shell in the shell；Lens mount can be mobile with the bracket relative to the bracket
Connection, for installing camera lens；First mover is fixed on the lens mount, and first mover is mobile to drive the camera lens
Seat is mobile；Second mover corresponds to the first mover setting on the bracket, described for driving first mover mobile
Second mover is mobile to drive the bracket mobile；Stator corresponds to being fixed in the shell of second mover, is used for
Drive second mover mobile；Second mover is between first mover and the stator.Second mover
Drive first mover mobile, the first mover is mobile to drive the lens mount mobile, realizes auto-focusing or optical anti-vibration；
Second mover described in the stator driving is mobile, and the second mover is mobile to drive the bracket mobile, realizes optical anti-vibration or automatic
Focusing；And second mover is between first mover and the stator, first mover, second mover
The width spaces of ultra-thin voice coil motor are occupied with the setting of the stator, longitudinal height that reduction occupancy is parallel to optical axis direction is empty
Between, so that the height of ultra-thin voice coil motor is lower, and structure is more compact.
2. ultra-thin voice coil motor of the invention, the stator, first mover and second mover are along optical axis direction
Setting, the middle line of the middle line of the stator, the middle line of first mover and second mover in the same plane, and are somebody's turn to do
Plane is not take up ultra-thin perpendicular to the optical axis, i.e., the installation site of described first mover, second mover and the stator
The height space of voice coil motor, so that the height of ultra-thin voice coil motor is lower, structure is more compact.
3. ultra-thin voice coil motor of the invention, be powered in coil of focusing, focus coil in the magnetic field of the magnet by
It is parallel to the effect of the power of optical axis direction, magnet drives the focusing coil to move along optical axis direction, and focusing coil is mobile to be driven
The lens mount is moved along optical axis direction, realizes automatic focusing function；It is powered in stabilization coil, the stabilization coil is in the magnetic
Effect in the magnetic field of iron by the power perpendicular to optical axis direction, magnet described in stabilization coil drive are moved perpendicular to optical axis direction
Dynamic, magnet is mobile to drive the support vertical mobile in optical axis direction, realizes optical anti-vibration function, that is, ultra-thin sound of the invention
Coil motor has the function of auto-focusing and optical anti-vibration.
4. ultra-thin voice coil motor of the invention, the setting of the monitoring part, can be monitored in real time to obtain focusing coil and/or
The motion conditions of magnet, to be preferably monitored to focusing coil and/or the motion conditions of magnet so that auto-focusing and/
Or the effect of optical anti-vibration is more preferable.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the decomposition diagram of ultra-thin voice coil motor of the invention；
Fig. 2 is the schematic diagram of the cross-sectional view for crossing optical axis of ultra-thin voice coil motor of the invention；
Fig. 3 is the position view of focusing coil of the invention, magnet and stabilization coil；
Description of symbols:
11- upper housing；12- lower cover；2- bracket；3- lens mount；4- focusing coil；5- magnet；6- stabilization line
Circle；7- wiring board；81- upper spring；Spring under 82-；The second elastic component of 9-.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one:
The ultra-thin voice coil motor of the present embodiment, including shell, bracket 2, lens mount 3, focusing coil 4, stabilization coil 6, magnetic
Iron 5, wiring board 7, the first elastic component and the second elastic component 9, bracket 2, lens mount 3, focusing coil 4, stabilization coil 6, magnet 5,
Wiring board 7, the first elastic component and the second elastic component 9 are all disposed in shell.
Shell includes upper housing 11 and lower cover 12, upper housing 11 and lower cover 12 formed after connecting mounting bracket 2, lens mount 3,
The accommodating chamber of focusing coil 4, stabilization coil 6, magnet 5, the first elastic component and the second elastic component 9.
It is fixedly connected between the lens mount 3 and the bracket 2 by first elastic component, lens mount 3 can be with respect to institute
It is mobile to state bracket 2.The first elastic component includes upper spring 81 and lower spring 82 in the present embodiment, the lens mount 3 along optical axis side
To upper end be equipped with upper spring 81, along the lower end of optical axis direction be equipped with lower spring 82.The inner ring fitting of upper spring 81 is fixed on mirror
On 3 upper end of headstock, the outer ring fitting of upper spring 81 is fixed on the end face of 3 upper end of correspondence lens mount of bracket 2, upper spring 81
It is connected between inner ring and outer ring with spring arm；Lower 82 inner ring of spring fitting is fixed on 3 lower end of lens mount, the outer ring of lower spring 82
It is fixed on the end face of 3 lower end of correspondence lens mount of bracket 2, is connected between the inner ring and outer ring of lower spring 82 by spring arm.
The lens mount 3 is suspended in the bracket 2 by upper spring 81 and lower spring 82.
It is fixedly connected between the bracket 2 and the shell by second elastic component 9, and bracket 2 can be relatively described
Shell is mobile.Second elastic component 9 of the present embodiment is stabilization spring, and one end of stabilization spring is fixed on the side of bracket 2, stabilization
The other end of spring is fixed on lower cover 12, and the both ends of stabilization spring are connected by spring arm, i.e., bracket 2 passes through the second elasticity
Part 9 is suspended in the accommodating chamber of shell, and can drive lens mount 3 mobile simultaneously when the movement of bracket 2.Certainly, the second elastic component 9 is gone back
It can be suspension, i.e., bracket 2 is suspended in the accommodating chamber of shell using suspension.
Focusing coil 4 is fixed on the lens mount 3, is located at described 3 lateral wall of lens mount one week, described to focal line
Circle 4 is mobile to drive the lens mount 3 mobile.As shown in Fig. 2, focusing 4 place plane of coil is perpendicular to optical axis.
The corresponding focusing coil 4 of magnet 5 is fixed on the bracket 2, the magnet 5 towards described to focal line
The one of circle 4 is pendant polar identical, and for driving the focusing coil 4 mobile, the magnet 5 is mobile to drive the bracket 2 mobile.
Stabilization coil 6 is fixed in the shell, the corresponding interval of magnet 5 setting, for driving the magnet 5
It is mobile.Multiple 6 serial or parallel connections of stabilization coil or independent connection.In the present embodiment, the magnet 5 and the stabilization line
Circle 6 is arranged in a one-to-one correspondence there are four being respectively correspondingly arranged, and the periphery of opposite optical axis is uniformly arranged, each opposite optical axis mirror settings
Two 6 serial or parallel connections of stabilization coil, naturally it is also possible to four stabilization coils 6 are independently arranged.
When auto-focusing, electric current is passed through in coil 4 of focusing, focusing coil 4 is within the scope of the magnetic induction of magnet 5 by parallel
In the effect of the power of optical axis direction, coil 4 of focusing is parallel to optical axis direction movement, drives lens mount 3 and is arranged in lens mount 3
Camera lens to be parallel to optical axis direction mobile.When optical anti-vibration, according to stabilization demand, it is passed through and is communicated greatly into four stabilization coils 6
The different electric current of small or different size or direction, makes stabilization coil 6 in the magnetic field of magnet 5 by the power perpendicular to optical axis direction
Effect, stabilization coil 6 occur perpendicular to optical axis direction translational movement, pair for driving the bracket 2 and being mounted in bracket 2
Translational movement perpendicular to optical axis direction occurs with respect to shell together for focal line circle 4, lens mount 3 and camera lens；When simultaneously to focal line
When being passed through the electric current of needs in circle 4 and optical anti-vibration 6, optical anti-vibration function can be realized while auto-focusing.
The magnet 5 is between the focusing coil 4 and the stabilization coil 6, focus coil 4, the stabilization coil 6
It is arranged with the magnet 5 along optical axis direction, the middle line and the magnet 5 of the focusing middle line of coil 4, the stabilization coil 6
Middle line in the same plane, and the plane is perpendicular to the optical axis.By make full use of magnet 5 towards the focusing coil
4 and the magnetic induction towards the stabilization coil 6, while realizing auto-focusing and optical anti-vibration function, it is the magnet 5, described right
The setting of focal line circle 4 and the stabilization coil 6 occupies the width spaces of ultra-thin voice coil motor, reduces to occupy being parallel to optical axis direction
Longitudinal height space so that the height of ultra-thin voice coil motor is lower, and structure is more compact.
Wiring board 7 is arranged in the shell, and stabilization coil 6 and focusing coil 4 are all connect with 7 signal of wiring board, route
Plate 7 has the end for the accommodating chamber for stretching out shell, and wiring board 7 passes through the external control mechanisms of the end and ultra-thin voice coil motor
Signal connection.
Ultra-thin voice coil motor is in order to realize the accurate control to optical anti-vibration, on the wiring board 7, the corresponding magnet
5 settings incude the Hall element of 5 magnetic induction of magnet variation, and in the present embodiment, the light of the magnet 5 is arranged in Hall element
The underface of axis direction, Hall element are changed by the magnetic induction of induced magnet 5, the location information of available magnet 5, and root
The size of current being input in stabilization coil 6 is adjusted according to the location information, and then realizes accurate optical anti-vibration function.
Certainly, Hall element can also be changed by the magnetic induction of induced magnet 5, obtain the location information of magnet 5, and root
The size of current being input in focusing coil 4 and stabilization coil 6 is adjusted according to the location information, and then realizes accurate auto-focusing
With optical anti-vibration function.
As disposable embodiment, corresponding focusing coil 4 and the setting induction focusing coil 4 of magnet 5 and magnetic in shell
The monitoring part of 5 position of iron, the change in location of focus described in the monitoring part real-time monitoring coil 4 and the magnet 5, and pass through adjusting
The size of current being input in focusing coil 4 and stabilization coil 6, equally can be realized accurate auto-focusing and optical anti-vibration function
Can, which also connect with wiring board 7.It is of course also possible to the magnetic strength of monitoring part monitoring focusing coil 4 and stabilization coil 6
It should change.
As disposable embodiment, stabilization coil 6 is fixedly mounted on lens mount 3, and magnet 5 is fixedly mounted on bracket
On 2, focusing coil 4 is mounted in shell, and the corresponding magnet 5 of stabilization coil 6 is arranged at intervals with multiple, and magnet 5 is arranged in stabilization
Between coil 6 and focusing coil 4, this setup of stabilization coil 6, focusing coil 4 and magnet 5 makes ultra-thin voice coil motor
Equally have the function of auto-focusing and optical anti-vibration, and the height of ultra-thin voice coil motor is similarly lower.
Embodiment two:
The camera of the present embodiment has ultra-thin voice coil motor described in embodiment one.It is ultra-thin using this in camera
When voice coil motor, the height of camera can reduce, so that camera can be used on ultra thin handset, the scope of application of camera
Extensively, and adapt to mobile phone growth requirement.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of ultra-thin voice coil motor, including,
Shell；
Bracket (2), can be relative to the mobile setting of the shell in the shell；
Lens mount (3) can be connect, for installing camera lens with the bracket (2) relative to what the bracket (2) were moved；
First mover is fixed on the lens mount (3), and first mover is mobile to drive the lens mount (3) mobile；
Second mover, corresponding first mover are arranged on the bracket (2), for driving first mover mobile, institute
It is mobile to state the mobile drive bracket (2) of the second mover；
Stator, corresponding second mover are fixed in the shell, for driving second mover mobile；
It is characterized in that, second mover is between first mover and the stator.
2. ultra-thin voice coil motor according to claim 1, which is characterized in that the stator, first mover and described
Second mover is arranged along optical axis direction, the middle line of the middle line of the stator, the middle line of first mover and second mover
In the same plane, and the plane is perpendicular to the optical axis.
3. ultra-thin voice coil motor according to claim 1 or 2, which is characterized in that first mover is described to be mounted on
Focusing coil (4) on lens mount (3) lateral wall one week；Second mover is the magnetic being fixedly mounted on the bracket (2)
Iron (5), the magnet (5) towards the one pendant polar identical of focusing coil (4)；The stator is the corresponding magnet
(5) spaced stabilization coil (6), multiple stabilization coil (6) serial or parallel connections or independent connection.
4. ultra-thin voice coil motor according to claim 3, which is characterized in that the magnet (5) and the stabilization coil (6)
There are four being respectively correspondingly arranged, the periphery of opposite optical axis is uniformly arranged.
5. ultra-thin voice coil motor according to claim 3, which is characterized in that further include the line that the case inside is arranged in
Road plate (7), the focusing coil (4) and the stabilization coil (6) are connect with the wiring board (7) signal.
6. ultra-thin voice coil motor according to claim 3, which is characterized in that further include the corresponding focusing coil (4) and/
Or the magnet (5) is arranged in the shell, for the position of focusing coil (4) and/or the magnet (5) described in real-time monitoring
Set the monitoring part of variation or change of magnetic field strength.
7. ultra-thin voice coil motor according to claim 6, which is characterized in that the monitoring part is setting assist side (7)
On, corresponding magnet (5) setting incudes the Hall element of the magnet (5) magnetic induction variation.
8. ultra-thin voice coil motor according to claim 1, which is characterized in that the lens mount (3) and the bracket (2) it
Between be fixedly connected by first elastic component.
9. ultra-thin voice coil motor according to claim 1, which is characterized in that lead between the bracket (2) and the shell
Second elastic component (9) is crossed to be fixedly connected.
10. a kind of camera, which is characterized in that have ultra-thin voice coil motor of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065933.1A CN109752815A (en) | 2019-01-23 | 2019-01-23 | Ultra-thin voice coil motor and camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065933.1A CN109752815A (en) | 2019-01-23 | 2019-01-23 | Ultra-thin voice coil motor and camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109752815A true CN109752815A (en) | 2019-05-14 |
Family
ID=66406195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910065933.1A Pending CN109752815A (en) | 2019-01-23 | 2019-01-23 | Ultra-thin voice coil motor and camera |
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| Country | Link |
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| CN (1) | CN109752815A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021092762A1 (en) * | 2019-11-12 | 2021-05-20 | 南昌欧菲光电技术有限公司 | Voice coil motor, camera module and electronic device |
| CN113126231A (en) * | 2021-04-28 | 2021-07-16 | 新思考电机有限公司 | Optical anti-shake drive mechanism, drive and image pickup device, and electronic apparatus |
| WO2022204883A1 (en) * | 2021-03-29 | 2022-10-06 | 欧菲光集团股份有限公司 | Driving assembly, photographic module and electronic device |
| CN115484358A (en) * | 2021-05-31 | 2022-12-16 | 北京小米移动软件有限公司 | Actuators, camera modules and electronics |
| CN116489508A (en) * | 2023-04-10 | 2023-07-25 | 包头江馨微电机科技有限公司 | SMA adjusting part and voice coil motor |
-
2019
- 2019-01-23 CN CN201910065933.1A patent/CN109752815A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021092762A1 (en) * | 2019-11-12 | 2021-05-20 | 南昌欧菲光电技术有限公司 | Voice coil motor, camera module and electronic device |
| WO2022204883A1 (en) * | 2021-03-29 | 2022-10-06 | 欧菲光集团股份有限公司 | Driving assembly, photographic module and electronic device |
| CN113126231A (en) * | 2021-04-28 | 2021-07-16 | 新思考电机有限公司 | Optical anti-shake drive mechanism, drive and image pickup device, and electronic apparatus |
| CN113126231B (en) * | 2021-04-28 | 2023-07-18 | 新思考电机有限公司 | Optical anti-shake drive mechanism, drive and camera device and electronic equipment |
| CN115484358A (en) * | 2021-05-31 | 2022-12-16 | 北京小米移动软件有限公司 | Actuators, camera modules and electronics |
| CN116489508A (en) * | 2023-04-10 | 2023-07-25 | 包头江馨微电机科技有限公司 | SMA adjusting part and voice coil motor |
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