CN111796471A - Auto-focusing motor and assembling method thereof - Google Patents
Auto-focusing motor and assembling method thereof Download PDFInfo
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- CN111796471A CN111796471A CN201910281104.7A CN201910281104A CN111796471A CN 111796471 A CN111796471 A CN 111796471A CN 201910281104 A CN201910281104 A CN 201910281104A CN 111796471 A CN111796471 A CN 111796471A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention provides an automatic focusing motor and an assembling method thereof, wherein the automatic focusing motor comprises: a motor housing including an accommodation space; a lens barrel module disposed in the accommodating space; a coil mounted on the barrel module; a magnetic member mounted on the motor housing and facing the coil; an upper structural member configured to fix the lens barrel module in a direction perpendicular to an optical axis; assembling a coil, a lens cone module and an upper structural part of an automatic focusing motor into an upper assembly part by taking the upper structural part of the automatic focusing motor as a reference; and assembly errors in the assembly process are reduced.
Description
Technical Field
The invention relates to the technical field of camera modules, in particular to an automatic focusing motor and an assembling method thereof.
Background
At present, most mobile equipment such as mobile phones and tablet computers carry camera modules, the conversion between optical signals and electric signals is realized through the camera modules, and image information is recorded and stored, so that the photographing and photographing functions are realized. Compared with the conventional Camera system, a Cell phone Camera Module (CCM) is widely used in various new-generation portable Camera devices due to its advantages of miniaturization, low power consumption, low cost, high image quality, and the like.
At present, the structure of the camera module includes a lens unit, a Voice Coil Motor (VCM), an infrared cut-off filter, an image sensor, a Flexible Printed Circuit Board (FPC) or a Printed Circuit Board (PCB), and a connector connected to a main Board of the mobile phone. The voice coil motor is used for achieving the automatic focusing function of the lens unit, the voice coil motor usually comprises a magnet, a coil and other structures, in the working process of the camera module, current is firstly supplied to the coil, a magnetic field is generated after the current is supplied to the coil, the magnetic field generated in the coil and the magnetic field generated by the magnet interact to generate electromagnetic force, the coil or the magnet moves under the action of the electromagnetic force, so that the lens unit connected with the voice coil motor is driven to move, the image distance and the object distance of the camera module are adjusted, and clear images are presented. Usually, a Hall Sensor (Hall-effect Sensor) may be further disposed in the voice coil motor, and the Hall Sensor is utilized to measure the change of the magnetic field in the voice coil motor, and the position of the coil or the magnet is determined according to the change of the magnetic field, thereby implementing the closed-loop control of the voice coil motor.
In the motor of the prior art, a plurality of components such as a coil, a magnet, a lens unit and the like need to be respectively assembled in a housing, so that a plurality of assembling processes are required, and assembling errors exist among the assembling processes, thereby affecting the focusing performance of the motor.
Disclosure of Invention
The invention aims to provide an assembly method of an automatic focusing motor, which reduces the assembly error of the motor, improves the performance of the motor and improves the performance of a camera module.
In order to solve the above technical problem, the present invention provides an assembly method of an auto focus motor, the auto focus motor including: the lens barrel comprises an upper structural part, a lens barrel module, a coil, a motor shell and a magnetic part;
assembling a coil, a lens cone module and an upper structural part of an automatic focusing motor into an upper assembly part by taking the upper structural part of the automatic focusing motor as a reference; and assembly errors in the assembly process are reduced.
Optionally, the method further includes:
assembling the motor shell and the magnetic component to form a lower assembly part;
and an upper assembly part and a lower assembly part are assembled by taking an upper structural part of the automatic focusing motor as a reference, so that the assembly error in the assembly process is reduced.
Optionally, the upper structural member comprises:
a rigid structure with a central circular hole;
a lens protection assembly assembled with an upper reference surface of the rigid structure;
an elastic clamping structure assembled with the lower reference surface of the rigid structure.
Optionally, the coil and the lens barrel module are assembled to the upper structural member by using the lower reference surface of the rigid structural body as a reference, and assembled to an upper assembly part.
Optionally, the coil and the lens barrel module are assembled into a whole, and then assembled to the lower reference surface of the rigid structure to form an upper assembly.
Optionally, after the assembly of the upper assembly part is completed, a testing device is provided, the elastic clamping structure is adjusted through testing, and the assembly precision is improved.
Optionally, the upper structural member further comprises: an upper soft connecting structure; the upper datum plane of the rigid structure body is provided with a side wall around the middle round hole, and the upper flexible connecting structure covers the side wall.
Optionally, a groove is formed in a position, close to the side wall, of the upper reference surface of the rigid structure, and used for fixing the lens protection assembly.
Optionally, a plurality of limiting structures are arranged at the edge of the lower reference surface of the rigid structure, and the limiting structures are used for fixing the elastic clamping structures.
Optionally, the lens barrel module is pressed against the elastic clamping structure and exposes the elastic clamping structure, so as to detect the assembly accuracy of the elastic clamping structure.
Optionally, the motor housing includes a lower flange structure, and the lower flange structure is disposed between the coil and the elastic clamping structure.
Accordingly, the present invention also provides an auto-focus motor, comprising:
a motor housing including an accommodation space;
a lens barrel module disposed in the accommodating space;
a coil mounted on the barrel module;
a magnetic member mounted on the motor housing and facing the coil;
an upper structural member configured to support the lens barrel module in a direction perpendicular to an optical axis.
Optionally, the upper structural member comprises:
a rigid structure with a central circular hole;
a lens protection assembly assembled with an upper reference surface of the rigid structure;
an elastic clamping structure assembled with the lower reference surface of the rigid structure.
Optionally, the upper structural member further comprises: an upper soft connecting structure; a side wall is arranged on the upper reference surface of the rigid structure body around the middle round hole; the upper flexible connecting structure covers the side wall, and the lens protection component is respectively connected with two ends of the upper flexible connecting structure.
Optionally, a groove is formed in a position, close to the side wall, of the upper reference surface of the rigid structure, and used for fixing the lens protection assembly.
Optionally, a plurality of limiting structures are arranged at the edge of the lower reference surface of the rigid structure, and the limiting structures are used for fixing the elastic clamping structures.
Optionally, the elastic clamping structure includes a main body area perpendicular to the optical axis direction, and a plurality of clamping areas parallel to the optical axis direction, and the clamping areas are in contact with the lens barrel module; at least one of the clamping areas provides a force in a direction perpendicular to an optical axis to support the barrel module.
Optionally, the motor housing includes a lower flange structure, and the lower flange structure is disposed between the coil and the elastic clamping structure.
Compared with the prior art, the automatic focusing motor and the assembling method thereof have the following beneficial effects:
according to the invention, the upper structural part of the automatic focusing motor is taken as a reference, the coil and the lens cone module of the automatic focusing motor and the upper structural part are assembled into an upper assembly part, and the same reference is adopted in the assembly process of the coil and the lens cone module, so that the assembly error in the assembly process is reduced.
Drawings
FIG. 1 is a cross-sectional view of an auto focus motor according to an embodiment of the present invention;
FIG. 2 is a block diagram of a datum plane on a rigid structure in accordance with one embodiment of the present invention;
FIG. 3 is a block diagram of a lower datum plane of a rigid structure in accordance with an embodiment of the present invention;
fig. 4 is a structural diagram of an elastic clamping structure according to an embodiment of the invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather construed as limited to the embodiments set forth herein.
Next, the present invention is described in detail by using schematic diagrams, and when the embodiments of the present invention are described in detail, the schematic diagrams are only examples for convenience of description, and the scope of the present invention should not be limited herein.
In order to solve the problems in the background art, the coil and the lens cone module of the automatic focusing motor are assembled with the upper structural part as an upper assembly part by taking the upper structural part of the automatic focusing motor as a reference, and the same reference is adopted in the assembly process of the coil and the lens cone module, so that the assembly error in the assembly process is reduced.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, an autofocus motor and a method of assembling the same according to the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the auto focus motor of the present invention includes: upper structure 10, lens barrel module 50, coil 40, motor housing 21, magnetic component 22. The motor housing 21 includes an accommodation space and is configured to be open at an upper end, the lens barrel module 50 is disposed in the accommodation space, the coil 40 is mounted on the lens barrel module 50, the magnetic member 22 is mounted on the motor housing 21 and faces the coil 40, and the upper structure 10 is configured to support the lens barrel module 50 in a direction perpendicular to the optical axis.
The coil 40 and the lens cone module 50 of the automatic focusing motor are assembled with the upper structural part 10 of the automatic focusing motor as the upper assembly part 1 by taking the upper structural part 10 of the automatic focusing motor as a reference, so that the assembly error in the assembly process is reduced. The motor housing 21 and the magnetic part 22 are assembled to form the lower assembly 2, and the upper assembly 1 and the lower assembly 2 are assembled based on the upper structural part 10 of the automatic focusing motor, so that the assembly error in the assembly process is reduced. In which the magnetic member 22 is fitted inside the motor case 21 to constitute the lower attachment 2. In the assembling process of the upper assembling part 1 and the lower assembling part 2, the upper structural part 10 is used as a reference, and errors accumulated by different assembling processes can be eliminated.
Wherein the upper structure 10 comprises: rigid structure 13, lens protection component 11, elastic clamping structure 14, upper soft connecting structure 12. The lens protection assembly 11 is assembled with the upper reference surface 131 of the rigid structure 13 and the resilient clamp structure 14 is assembled with the lower reference surface 132 of the rigid structure 13. The upper flexible connecting structure 12 covers a part of the rigid structure 13 and connects the lens protection assembly 11 and the lens barrel module 50.
Referring to fig. 2, the rigid structure 13 has a central circular hole 133, and the upper reference surface 131 of the rigid structure 13 is provided with a sidewall 1311 around the central circular hole 133. The upper flexible connecting structures 12 cover the sidewall 1311 to prevent the upper flexible connecting structures 12 from being folded and adhered together during movement. The upper flexible connecting structure 12 is annular, and the lens protection assembly 11 is respectively connected to one end of the upper flexible connecting structure 12, wherein the lens protection assembly 11 is in contact with the outer wall of the lens barrel module 50 to provide a force perpendicular to the optical axis direction to support the upper portion of the lens barrel module 50. In addition, during the process of the telescopic movement of the lens barrel module 50, the upper flexible connecting structure 12 moves along with the movement, so as to prevent external foreign objects from entering the inside of the automatic focusing motor.
The upper reference surface 131 of the rigid structure 13 is provided with a groove 1312 near the sidewall 1311 for fixing the lens protection assembly 11. In the assembling process, the upper flexible connecting structure 12 further covers the groove 1312, glue is injected into the groove 1312, and one end of the lens protecting shell 111 is bonded into the groove 1312 and connected with one end of the upper flexible connecting structure 12.
Referring to fig. 3, a plurality of limiting structures 1321 are disposed at the edge of the lower reference surface 132 of the rigid structure 13, and the limiting structures 1321 are used for fixing the elastic clamping structures 14. In this embodiment, the limiting structure 1321 is a boss, and the shape thereof may be a plurality of shapes such as a circle, a square, a diamond, and a hexagon. The edge of the elastic clamping structure 14 is provided with a groove 144 corresponding to the limiting structure 1321, the groove 144 may or may not penetrate through the elastic clamping structure 14, the shape of the groove 144 may be circular, square, diamond, hexagon, etc., and the shape thereof is correspondingly arranged according to the shape of the limiting structure 1321. In addition, in other embodiments of the present invention, the limiting structure 1321 may also be configured as a limiting groove, and the elastic clamping structure 14 may be configured with a limiting boss correspondingly, so as to fix and assemble the elastic clamping structure 14 to the rigid structure 13, which is also within the scope of the protection concept of the present invention.
The coil 40 and the lens barrel module 50 are sequentially assembled to the upper structure 10 with the lower reference surface 132 of the rigid structure 13 as a reference, and assembled to the upper assembly member 1; alternatively, the coil 40 and the lens barrel module 50 are assembled together and then assembled to the lower reference surface 132 of the rigid structure 13 to form the upper assembly 1, so that the assembly process is simplified. After the assembly of the upper assembly part 1 is completed, a testing device is provided, and the elastic clamping structure 14 is adjusted through testing, so that the assembly precision of the elastic clamping structure 14 is adjusted, and the assembly error in the assembly process is reduced. For example, the testing device provides current to the coil 40 to detect the assembly accuracy of the elastic clamping structure according to the output electrical signal, or provides force to mechanically test the elastic clamping structure 14, and detects the force of each part of the elastic clamping structure 14 clamping the lens barrel module 50 through the feedback of the force sensor, thereby detecting the assembly accuracy of the elastic clamping structure.
Referring to fig. 4, the elastic clamping structure 14 includes a body region 141 perpendicular to the optical axis direction, and a plurality of clamping regions 142 parallel to the optical axis direction, the clamping regions 142 are in contact with the lens barrel module 50, and at least one clamping region 142 provides a force perpendicular to the optical axis direction to the lens barrel module 50 to support the lower portion of the lens barrel module 50.
In addition, after the assembly of the upper assembly member 1 is completed, the lens barrel module 50 is pressed against the elastic clamping structure 14 and exposes the elastic clamping structure 14, and at this time, the assembly accuracy of the elastic clamping structure 14 can be detected, so that the assembly accuracy of the whole automatic focusing motor is improved.
With continued reference to fig. 1, the motor housing 21 includes a turndown feature 211, the turndown feature 211 being disposed between the coil 40 and the resilient clamp structure 14. The position of the lower flanging structure 211 corresponding to the elastic clamping structure 14 is provided with a hollowed-out structure 2112.
In the assembling method of the present invention, the lens protection assembly 11 is assembled with reference to the upper reference surface of the rigid structure 13, and the elastic clamp structure 14 is assembled with reference to the lower reference surface of the rigid structure 13, and the assembling error includes only the error caused between the upper and lower reference surfaces of the rigid structure 13. In the assembling process of the lens barrel module 50, the top part is fixed by the lens protection component 11, and the bottom part is in contact connection with the elastic clamping structure 13, so that no additional assembling error exists. Further, the motor housing 21 is assembled with the lower reference surface as the reference, and the coil 40, the motor housing 21 and the lens barrel module 50 are not fixedly connected with each other, so that no additional assembly error is generated, and therefore, only one assembly error exists in the assembly process, the assembly precision can be improved, the optical axis deviation of the lens unit is avoided, and the imaging quality of the camera module is improved.
In summary, in the present invention, the upper structural member of the auto-focus motor is used as a reference, the coil, the lens barrel module and the upper structural member of the auto-focus motor are assembled into an upper assembly, the upper assembly is integrated with the lower assembly composed of the motor housing and the magnetic component, and the upper structural member is used as a reference in each assembly process, that is, the same reference is used, so that errors accumulated in each assembly process are avoided, and therefore, the assembly errors in the assembly process are reduced. In addition, including last soft connection structure, soft connection structure down in the upper portion structure, avoid outside foreign matter to get into inside the camera module, improve the performance of module.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (18)
1. An assembling method of an auto focus motor, the auto focus motor comprising: the lens barrel comprises an upper structural part, a lens barrel module, a coil, a motor shell and a magnetic part;
assembling a coil, a lens cone module and an upper structural part of an automatic focusing motor into an upper assembly part by taking the upper structural part of the automatic focusing motor as a reference; and assembly errors in the assembly process are reduced.
2. The method of assembling an autofocus motor of claim 1, further comprising:
assembling the motor shell and the magnetic component to form a lower assembly part;
and an upper assembly part and a lower assembly part are assembled by taking an upper structural part of the automatic focusing motor as a reference, so that the assembly error in the assembly process is reduced.
3. The method of assembling an autofocus motor of claim 1, wherein the upper structural component comprises:
a rigid structure with a central circular hole;
a lens protection assembly assembled with an upper reference surface of the rigid structure;
an elastic clamping structure assembled with the lower reference surface of the rigid structure.
4. The method of assembling an autofocus motor according to claim 3, wherein the coil and the barrel module are assembled to the upper structural member as an upper assembly member with reference to a lower reference surface of the rigid structural member.
5. The method of assembling an autofocus motor according to claim 3, wherein the coil and the barrel module are assembled together and then assembled to a lower reference surface of the rigid structure as an upper assembly.
6. The assembling method of the auto-focus motor according to claim 3, wherein after the assembling of the upper assembling member is completed, a testing device is provided to adjust the elastic clamping structure by testing, thereby improving the assembling accuracy.
7. The method of assembling an autofocus motor of claim 3, wherein the upper structural component further comprises: an upper soft connecting structure; the upper datum plane of the rigid structure body is provided with a side wall around the middle round hole, and the upper flexible connecting structure covers the side wall.
8. The method of assembling an autofocus motor of claim 7, wherein the rigid structure has a groove in an upper reference surface thereof near the sidewall for fixing the lens protection assembly.
9. The method of assembling an autofocus motor of claim 7, wherein a plurality of position-limiting structures are provided at the lower reference surface edge of the rigid structure, and the position-limiting structures are used to fix the elastic clamping structure.
10. The assembling method of the auto-focus motor according to claim 3, wherein the lens barrel module is pressed against and exposes the elastic clamping structure to detect the assembling accuracy of the elastic clamping structure.
11. The method of assembling an autofocus motor of claim 3, wherein the motor housing includes a turndown feature disposed between the coil and the resilient clamp structure.
12. An auto focus motor, comprising:
a motor housing including an accommodation space;
a lens barrel module disposed in the accommodating space;
a coil mounted on the barrel module;
a magnetic member mounted on the motor housing and facing the coil;
an upper structural member configured to support the lens barrel module in a direction perpendicular to an optical axis.
13. The autofocus motor of claim 12, wherein the upper structural member comprises:
a rigid structure with a central circular hole;
a lens protection assembly assembled with an upper reference surface of the rigid structure;
an elastic clamping structure assembled with the lower reference surface of the rigid structure.
14. The autofocus motor of claim 13, wherein the upper structural member further comprises: an upper soft connecting structure; a side wall is arranged on the upper reference surface of the rigid structure body around the middle round hole; the upper flexible connecting structure covers the side wall, and the lens protection component is respectively connected with two ends of the upper flexible connecting structure.
15. The autofocus motor of claim 14, wherein the upper reference surface of the rigid structure is provided with a groove near the sidewall for securing the lens protection assembly.
16. The autofocus motor of claim 13, wherein a plurality of retaining structures are provided at the lower reference surface edge of the rigid structure, the retaining structures for securing the resilient clamp structure.
17. The autofocus motor of claim 13, wherein the resilient clamping structure comprises a body region in a direction perpendicular to the optical axis, a plurality of clamping regions in a direction parallel to the optical axis, the clamping regions being in contact with the barrel module; at least one of the clamping areas provides a force in a direction perpendicular to an optical axis to support the barrel module.
18. The autofocus motor of claim 13, wherein the motor housing includes a turndown feature disposed between the coil and the resilient clamp feature.
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| CN201910281104.7A CN111796471B (en) | 2019-04-09 | 2019-04-09 | Auto-focusing motor and assembling method thereof |
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| CN111796471B CN111796471B (en) | 2022-01-18 |
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| CN207114854U (en) * | 2017-06-27 | 2018-03-16 | 东莞佩斯讯光电技术有限公司 | It is a kind of can Multidirectional motion voice coil motor and double take the photograph double optics stabilization module |
| CN107483682A (en) * | 2017-10-16 | 2017-12-15 | 信利光电股份有限公司 | Voice coil motor and its automatic focusing camera head mould group applied |
| CN207819733U (en) * | 2017-11-22 | 2018-09-04 | 格科微电子（上海）有限公司 | The voice coil motor structure of camera module |
| CN207819609U (en) * | 2018-01-26 | 2018-09-04 | 东莞市鑫濠数码科技有限公司 | A kind of voice coil motor facilitating installation |
| CN208461635U (en) * | 2018-05-29 | 2019-02-01 | 上海歌尔泰克机器人有限公司 | A kind of holder |
| CN108769495A (en) * | 2018-08-07 | 2018-11-06 | 宁波舜宇光电信息有限公司 | A kind of camera module and assemble method and electronic equipment |
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