CN107040120B - Voice coil motor - Google Patents
Voice coil motor Download PDFInfo
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- CN107040120B CN107040120B CN201710321680.0A CN201710321680A CN107040120B CN 107040120 B CN107040120 B CN 107040120B CN 201710321680 A CN201710321680 A CN 201710321680A CN 107040120 B CN107040120 B CN 107040120B
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- Prior art keywords
- coil
- magnet
- pole
- stator
- support
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- 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
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
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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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses a voice coil motor, which comprises: the stator is fixed on the base and correspondingly arranged right below the mover, one of the stator and the mover is a coil, and the other of the stator and the mover is a magnet. The invention sets the stator and the rotor up and down correspondingly, one of the stator and the rotor is a coil, the other is a magnet, the N pole of the coil is up or down determined by the current direction of the coil after the coil is electrified according to the ampere rule, the coil interacts with the magnet above or below the coil to drive the bracket to move up or down, so that the bracket drives the lens to move up and down to change the focal length, and the aim of clearing images is achieved.
Description
Technical Field
The present invention relates to a voice coil motor.
Background
The voice coil motor has the characteristics of high frequency response and high precision. The main principle is that in a permanent magnetic field, the stretching position of a spring piece is controlled by changing the direct current of a coil in a motor, so that the spring piece is driven to move up and down to realize focusing. The VCM is widely used by the mobile phone camera to realize the automatic focusing function, and the position of the lens can be adjusted through the VCM to present clear images.
The existing voice coil motor is characterized in that a coil is wound on the side face of a support, magnets are arranged on the periphery of the coil, namely the magnets and the coil are transversely arranged, the coil after being electrified is surrounded by the magnets to form a magnetic field, according to left-hand rules, when the coil after being electrified passes through the magnetic field, a force perpendicular to the magnetic field line can be generated, namely the current direction generated after the coil is electrified can enable the support to form an upward or downward force, the support can drive a lens to move up and down to change the focal length, and the purpose of image definition is achieved.
The present inventors have made extensive studies and studies to develop and design the present invention in view of continuous innovation and improvement of products.
Disclosure of Invention
The invention aims to provide a voice coil motor which has a design principle completely different from that of the existing voice coil motor and can achieve the same effect.
In order to achieve the above purpose, the solution of the invention is:
a voice coil motor comprises a base, a yoke plate, a support, a stator and a rotor, wherein the base and the yoke plate are vertically matched together, the support, the stator and the rotor are arranged in the base and the yoke plate, the rotor is fixed on the periphery of the support, the stator is fixed on the base and correspondingly arranged right below the rotor, one of the stator and the rotor is a coil, and the other of the stator and the rotor is a magnet.
The stator is a magnet, and the rotor is a coil.
The stator is a coil, and the rotor is a magnet.
An upper elastic sheet is arranged between the top surface of the support and the inner top surface of the yoke plate, and a lower elastic sheet is arranged between the bottom surface of the support and the top surface of the base.
The rotor is fixed on the periphery of the support in an annular mode, and the rotor is fixed on the top surface of the base in an annular mode.
The base is provided with a groove corresponding to the magnet, and the magnet is fixedly matched in the groove.
The base is provided with a convex wall for fixing the coil, and the coil is fixed on the convex wall.
After the structure is adopted, the stator and the rotor are arranged in an up-and-down corresponding mode in the voice coil motor, one of the stator and the rotor is a coil, the other one of the stator and the rotor is a magnet, the N pole of the coil is determined to be on or off according to the ampere rule after the coil is electrified, the coil interacts with the magnet on or under the coil to drive the support to move upwards or downwards, the support drives the lens to move upwards and downwards to change the focal length, and the purpose of image definition is achieved. The invention is completely different from the design principle of the existing voice coil motor, the existing voice coil motor utilizes the left-hand rule to horizontally arrange the coil and the magnet, and the support moves axially under the action of Lorentz Force of the coil and the magnet.
Drawings
Fig. 1 is an exploded view of a first embodiment of the present invention.
Fig. 2 is a combination diagram of the first embodiment of the present invention.
Fig. 3 is a top view of the first embodiment of the present invention.
Fig. 4 is a cross-sectional view of a first embodiment of the present invention.
Fig. 5 is an exploded view of a second embodiment of the present invention.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
As shown in fig. 1 to 5, the present invention discloses a voice coil motor, which includes a yoke plate 1, an upper spring plate 2, a bracket 3, a lower spring plate 4 and a base 5, which are sequentially arranged from top to bottom, wherein the base 5 and the yoke plate 1 are vertically matched together, the upper spring plate 2, the bracket 3 and the lower spring plate 4 are arranged in the base 5 and the yoke plate 1, the upper spring plate 2 is arranged between the top surface of the bracket 3 and the inner top surface of the yoke plate 1, and the lower spring plate 4 is arranged between the bottom surface of the bracket 3 and the top surface of the base 5. The outer ring of the support 3 is provided with a rotor 6, the base 5 is provided with a stator 7 facing the rotor 6, one of the stator 7 and the rotor 6 is a coil A, and the other is a magnet B.
As shown in fig. 1 to 4, a first embodiment of the present invention is described, in which the mover 6 is a coil a fixed to the outer periphery of the holder 3 in a ring shape, the stator 7 is a magnet B fixed to the top surface of the base 5 in a ring shape, the base 5 is provided with a groove 51 corresponding to the magnet B, the magnet B is fixedly fitted in the groove 51, one of the N pole and the S pole of the magnet B faces the coil a, and the present embodiment is described by taking the case where the N pole of the magnet B faces upward.
When the coil A is electrified, according to the ampere rule, if the current of the coil A is controlled to be in the clockwise direction, the N pole of the coil A faces downwards, the N pole of the coil A and the N pole of the magnet B repel each other, and the coil A drives the support 3 to move upwards; if the current of the coil A is controlled to be in the anticlockwise direction, the N pole of the coil A faces upwards, the S pole of the coil A is attracted with the N pole of the magnet B, the coil A drives the support 3 to move downwards, the upper elastic sheet 2 and the lower elastic sheet 4 provide a reaction force to balance the interaction force generated between the coil A and the magnet B, the support 3 is moved to a preset position, and the lens on the support 3 achieves the purpose of focusing.
As shown in fig. 5, a second embodiment of the present invention is described, in which the mover 6 is a magnet B fixed annularly to the outer periphery of the holder 3, the stator 7 is a coil a fixed annularly to the top surface of the base 5, the base 5 is provided with a boss 52 fixed correspondingly to the coil a, the coil a is fixed to the boss 52 by winding or gluing, and one of the N pole and the S pole of the magnet B faces the coil a, and the present embodiment is described by taking the case where the N pole of the magnet B faces upward and the S pole faces downward.
When the coil A is electrified, according to the ampere rule, if the current of the coil A is controlled to be in the clockwise direction, the N pole of the coil A faces downwards, the S pole of the coil A faces upwards, and the S pole of the coil A and the S pole of the magnet B right above repel each other, so that the magnet B drives the support 3 to move upwards; if the current of the control coil A is in the counterclockwise direction, the N pole of the coil A faces upwards, the N pole of the coil A is attracted with the S pole of the magnet B right above, the magnet B drives the support 3 to move downwards, the upper elastic sheet 2 and the lower elastic sheet 4 provide reaction force to balance the interaction force generated between the coil A and the magnet B, the support 3 is moved to a preset position, and therefore the lens on the support 3 achieves the purpose of focusing.
The voice coil motor of the invention sets up stator 7 and runner 6 up and down correspondingly, the stator 7 is fixed on the base 5, and the runner 6 is fixed with support 3 together, one of the stator 7 and runner 6 is coil A, another one is magnetite B, utilize two magnetic poles of opposite ends with magnetite B in the magnetic field produced by the electrified coil A to repel each other or attract each other (the like magnetic pole repels, the unlike magnetic pole attracts) make the support 3 combined with runner 6 move up or down according to ampere's rule, the support 3 drives the lens to move up and down and change the focus, achieve the goal of the sharp image.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.
Claims (7)
1. A voice coil motor, comprising: the stator is fixed on the base and correspondingly arranged right below the mover, one of the stator and the mover is a coil, and the other of the stator and the mover is a magnet; according to the ampere rule, the N pole of the coil is determined to be on or off according to the current direction after the coil is electrified, and the coil interacts with the magnet on or off the coil to drive the support to move upwards or downwards; when the magnet is positioned below the coil, if the current of the coil is controlled to be in a clockwise direction, the N pole of the coil faces downwards, and the N pole of the coil and the N pole of the magnet repel each other, so that the coil drives the support to move upwards; if the current of the control coil is in the anticlockwise direction, the N pole of the coil faces upwards, and the S pole of the coil is attracted with the N pole of the magnet, so that the coil drives the support to move downwards; when the magnet is positioned above the coil, if the current of the coil is controlled to be in a clockwise direction, the N pole of the coil faces downwards, the S pole of the coil faces upwards, and the S pole of the coil and the S pole of the magnet right above the coil repel each other, so that the magnet drives the support to move upwards; if the current of the control coil is in the anticlockwise direction, the N pole of the coil faces upwards, the N pole of the coil is attracted with the S pole of the magnet right above the coil, and the magnet can drive the support to move downwards.
2. The voice coil motor of claim 1, wherein: an upper elastic sheet is arranged between the top surface of the support and the inner top surface of the yoke plate, and a lower elastic sheet is arranged between the bottom surface of the support and the top surface of the base.
3. The voice coil motor of claim 1, wherein: the rotor is fixed on the periphery of the support in an annular mode, and the stator is fixed on the top surface of the base in an annular mode.
4. A voice coil motor as claimed in any one of claims 1 to 3, wherein: the stator is a magnet, and the rotor is a coil.
5. A voice coil motor as claimed in any one of claims 1 to 3, wherein: the stator is a coil, and the rotor is a magnet.
6. The voice coil motor of claim 4, wherein: the base is provided with a groove corresponding to the magnet, and the magnet is fixedly matched in the groove.
7. The voice coil motor of claim 5, wherein: the base is provided with a convex wall for fixing the coil, and the coil is fixed on the convex wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710321680.0A CN107040120B (en) | 2017-05-09 | 2017-05-09 | Voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710321680.0A CN107040120B (en) | 2017-05-09 | 2017-05-09 | Voice coil motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107040120A CN107040120A (en) | 2017-08-11 |
| CN107040120B true CN107040120B (en) | 2020-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710321680.0A Active CN107040120B (en) | 2017-05-09 | 2017-05-09 | Voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107040120B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964399A (en) * | 2018-07-24 | 2018-12-07 | 深圳市米成电子有限公司 | A kind of VCM motor stator and mover point plastic structure |
| CN117674535A (en) * | 2022-08-31 | 2024-03-08 | 晋城三赢精密电子有限公司 | Voice coil motor, lens module and electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201107451Y (en) * | 2007-11-27 | 2008-08-27 | 德昌电机(深圳)有限公司 | Lens drive apparatus and numerical code apparatus using the same |
| CN103051144A (en) * | 2012-01-09 | 2013-04-17 | 金龙机电股份有限公司 | Voice coil motor |
| CN104283396A (en) * | 2014-10-21 | 2015-01-14 | 深圳市世尊科技有限公司 | Voice coil motor for achieving optical vibration prevention through transverse movement |
| CN104362826A (en) * | 2014-10-31 | 2015-02-18 | 厦门新鸿洲精密科技有限公司 | Superposition type voice coil motor and process for manufacturing same |
-
2017
- 2017-05-09 CN CN201710321680.0A patent/CN107040120B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201107451Y (en) * | 2007-11-27 | 2008-08-27 | 德昌电机(深圳)有限公司 | Lens drive apparatus and numerical code apparatus using the same |
| CN103051144A (en) * | 2012-01-09 | 2013-04-17 | 金龙机电股份有限公司 | Voice coil motor |
| CN104283396A (en) * | 2014-10-21 | 2015-01-14 | 深圳市世尊科技有限公司 | Voice coil motor for achieving optical vibration prevention through transverse movement |
| CN104362826A (en) * | 2014-10-31 | 2015-02-18 | 厦门新鸿洲精密科技有限公司 | Superposition type voice coil motor and process for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107040120A (en) | 2017-08-11 |
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