CN108092484A - A kind of voice coil motor and camera module - Google Patents
A kind of voice coil motor and camera module Download PDFInfo
- Publication number
- CN108092484A CN108092484A CN201711432577.XA CN201711432577A CN108092484A CN 108092484 A CN108092484 A CN 108092484A CN 201711432577 A CN201711432577 A CN 201711432577A CN 108092484 A CN108092484 A CN 108092484A
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- CN
- China
- Prior art keywords
- voice coil
- magnetic
- coil motor
- conductive metal
- magnetic conductive
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The embodiment of the invention discloses a kind of voice coil motor and camera module, wherein, voice coil motor includes solenoid and the magnetic conductive metal core of no magnetic, magnetic conductive metal core are arranged on inside solenoid, so that when solenoid is powered, magnetic conductive metal core is magnetized and generates magnetic field.The technical solution of the application replaces permanent magnet using magnetic conductive metal, and internal after solenoid energization to generate uniform magnetic field, magnetic conductive metal can be magnetized, and be equivalent to magnet, the magnetic field intensity positive correlation of the intensity and solenoid in magnetic conductive metal magnetic field；During without being powered motor body to motor will not band be magnetic.It effectively solves the problem of motor body band is magnetic, makes troubles when being assembled to camera module, avoids increasing the equipment that magnetic field is overcome to influence, reduce camera module assembly cost, camera module is facilitated to assemble.
Description
Technical field
The present embodiments relate to photographic equipment technical field, more particularly to a kind of voice coil motor and camera module.
Background technology
VCM (Voice Coil Actuator, voice coil motor) is a kind of device for converting electrical energy into mechanical energy, and real
The movement of existing linear pattern and limited pivot angle.Magnetic pole in the magnetic field generated using the magnetic field from permanent-magnet steel and hot-wire coil conductor
Between interaction generate the device of regular movement.
Since permanent magnet of the voice coil motor inside generates magnetic field, entire voice coil motor body band is caused to be magnetic,
I.e. in voice coil motor no power, voice coil motor is still magnetic.And when camera module is assembled, voice coil motor body
Magnetism can influence the assembling effect of camera module, it is necessary to additionally increase overcome magnetic field influence equipment, not only to camera shooting head mould
The assembling of group is made troubles, and also adds camera module assembly cost.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of voice coil motor and camera module, and removal voice coil motor does not work shape
Magnetism during state, to facilitate the assembling of camera module.
In order to solve the above technical problems, the embodiment of the present invention provides following technical scheme：
On the one hand the embodiment of the present invention provides a kind of voice coil motor, including：
Solenoid and the magnetic conductive metal core of no magnetic, the magnetic conductive metal core are arranged on inside the solenoid, so that in institute
When stating solenoid energization, the magnetic conductive metal core is magnetized and generates magnetic field.
Optionally, further include：
Degaussing gear, in voice coil motor off position, eliminating the magnetism of the magnetic conductive metal core.
Optionally, the degaussing gear is heating degaussing gear.
Optionally, further include：
Temperature-detecting device, for detecting the temperature of voice coil motor.
Optionally, the magnetic conductive metal core is iron core or dilval.
Optionally, further include：
Alarm, for when the temperature of voice coil motor is more than predetermined threshold value, carrying out alarm.
On the other hand the embodiment of the present invention provides a kind of camera module, including the voice coil horse as described in preceding any one
It reaches.
An embodiment of the present invention provides a kind of voice coil motor, the magnetic conductive metal core including solenoid with no magnetic, magnetic conductive metal
Core is arranged on inside solenoid, so that when solenoid is powered, magnetic conductive metal core is magnetized and generates magnetic field.
The advantages of technical solution that the application provides, is, replaces permanent magnet using magnetic conductive metal, is powered in solenoid
Internal afterwards to generate uniform magnetic field, magnetic conductive metal can be magnetized, and be equivalent to magnet, the intensity and solenoid in magnetic conductive metal magnetic field
Magnetic field intensity positive correlation；During without being powered motor body to motor will not band be magnetic.Effectively solves motor body band
The problem of being magnetic, making troubles when being assembled to camera module avoids increasing the equipment that magnetic field is overcome to influence, reduces camera shooting
Head mould group assembly cost, facilitates camera module to assemble.
In addition, the embodiment of the present invention provides application scenarios also directed to voice coil motor, further such that the voice coil motor
With more practicability, the camera module has the advantages that corresponding.
Description of the drawings
It, below will be to embodiment or existing for the clearer technical solution for illustrating the embodiment of the present invention or the prior art
Attached drawing is briefly described needed in technology description, it should be apparent that, the accompanying drawings in the following description is only this hair
Some bright embodiments, for those of ordinary skill in the art, without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 provides a kind of specific embodiment structure chart of voice coil motor for the embodiment of the present invention；
Fig. 2 provides another specific embodiment structure chart of voice coil motor for the embodiment of the present invention.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiment be only part of the embodiment of the present invention rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, belong to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " " in the description and claims of this application and above-mentioned attached drawing
Four " etc. be for distinguishing different objects rather than for describing specific order.In addition term " comprising " and " having " and
Their any deformations, it is intended that cover non-exclusive include.Such as contain the process of series of steps or unit, method,
The step of system, product or equipment are not limited to list or unit, but the step of may include not list or unit.
After the technical solution of the embodiment of the present invention is described, the various nonrestrictive realities of detailed description below the application
Apply mode.
Referring first to Fig. 1, Fig. 1 is a kind of specific embodiment structure chart of voice coil motor provided in an embodiment of the present invention,
The embodiment of the present invention may include herein below：
Voice coil motor may include solenoid 1 and the magnetic conductive metal core 2 of no magnetic, and magnetic conductive metal core 2 is arranged in solenoid 1
Portion.
The number of turn (i.e. winding turns) of solenoid 1 can be determined according to specific actual conditions, and the application does not do this
Any restriction.
Magnetic conductive metal core 2 can be that magnetic conductive metals or alloy, the magnetic conduction effects of alloy such as iron core, dilval compare simple metal
Height is specially the metal core of which kind of material, can be determined according to user demand and cost, the application does not do this any limit
It is fixed.
Solenoid 1 is internal after being powered to generate uniform magnetic field, magnetic field intensity B=u0NI, wherein u0For magnetic conductivity, it is
Constant；N is winding turns；I is the electric current by coil.Therefore, by control the size of electric current I can be with control coil inside
Magnetic field intensity B.
The magnetic conductive metal core without magnetic is inserted into coil, magnetic conductive metal core is magnetized, and is equivalent to a magnet, magnetic conductive metal
The intensity B in core magnetic field1With B positive correlations.Permanent magnet is substituted using magnetic conductive metal core to be placed on inside voice coil motor, inside motor
A magnetic field will be generated, and the intensity in this magnetic field can change by changing the size of current of solenoid.
According to left hand rule, the magnetic line of force of horizontal cutting magnetic field after voice coil motor coil conduction, so as to generate a band index glass
Upward power drives the camera lens to carry out auto-focusing.And driving force F=B1I1L, wherein B1For voice coil motor inner magnet field strength
Degree, I1By the electric current of voice coil motor coil, L is the effective length of coil cutting magnetic line.Therefore, by using outer circuits
Size of current to control solenoid can control the magnetic field intensity inside voice coil motor, and then control drive motor coils upward
The size of the power of movement realizes automatic focusing function.And circuit is when working, voice coil motor not carrying magnetic in itself, module factory group
Dress process is without considering that the additional action of increase overcomes the influence in magnetic field.
In technical solution provided in an embodiment of the present invention, permanent magnet is replaced using magnetic conductive metal, is powered in solenoid
Internal afterwards to generate uniform magnetic field, magnetic conductive metal can be magnetized, and be equivalent to magnet, the intensity and solenoid in magnetic conductive metal magnetic field
Magnetic field intensity positive correlation；During without being powered motor body to motor will not band be magnetic.Effectively solves motor body band
The problem of being magnetic, making troubles when being assembled to camera module avoids increasing the equipment that magnetic field is overcome to influence, reduces camera shooting
Head mould group assembly cost, facilitates camera module to assemble.
Based on above-described embodiment, present invention also provides another embodiment, referring to Fig. 2, including 1 He of solenoid
Outside magnetic conductive metal core 2, voice coil motor may also include degaussing gear 3, temperature-detecting device 4 and alarm 5, in voice coil motor
In different embodiments, degaussing gear 3, temperature-detecting device 4 and alarm 5 can be combined, the application to this not
Do any restriction.
Degaussing gear 3, in voice coil motor off position, eliminating the magnetism of magnetic conductive metal core.
In view of the magnetic conductive metal core that is magnetized after power-off is flowed, it is impossible to immediately become nonmagnetic or or residual
Less magnetism in order to facilitate the assembling of camera module, can carry out demagnetization to magnetic conductive metal core.Material after magnetization, is subject to
The influence of external energy, such as the magnetic of each magnetic domain therein such as heating, impact away from direction can become inconsistent, and magnetism will
Weaken or disappear, this process is known as demagnetization.For example, magnetic material can will be stayed to be placed in alternating current magnetic field, weaken exchange gradually
Until disappearing, this material is just unmagnetized magnetic field intensity.Such as CRT kinescopes.In a kind of specific embodiment, demagnetization dress
It can be heating degaussing gear to put.
When being overheated in view of voice coil motor, the work efficiency of some devices can be influenced, is even burnt inside voice coil motor
Some components, in order to avoid the above situation occur, can set temperature detection device 4, for detecting the temperature of voice coil motor.
Certainly, when heating degaussing gear is provided in voice coil motor, temperature-detecting device 4 can be additionally used in monitoring heating degaussing gear and add
The temperature of heat ensures heating degaussing gear heating effect to meet demagnetization, and it is too high to be unlikely to temperature, influences voice coil motor member device
The service life of part.
Alarm 5, for when the temperature of voice coil motor is more than predetermined threshold value, carrying out alarm.
When temperature-detecting device 4 detects that the temperature of voice coil motor is higher, such as during more than default threshold value (85 DEG C),
When the temperature for either detecting demagnetization heating devices heat is more than or does not reach preset temperature threshold range, alarm is carried out.
So that staff or user are overhauled as early as possible, ensure the normal operation of voice coil motor.Preferably, alarm 5 can be buzzing
Alarm, certainly or other kinds of, the application is not limited in any way this.
By setting degaussing gear 3, temperature-detecting device 4 and alarm 5, can with the assembling of more convenient camera module,
Promote the usage experience of user.
In addition, present invention also provides a kind of camera module, including the voice coil horse described in as above any one embodiment
It reaches, specifically describes the description that can refer to the various embodiments described above, details are not described herein again.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with it is other
The difference of embodiment, just to refer each other for same or similar part between each embodiment.For embodiment disclosed device
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related part is said referring to method part
It is bright.
Professional further appreciates that, with reference to each exemplary list of the embodiments described herein description
Member can realize with the combination of electronic hardware, computer software or the two, can in order to clearly demonstrate hardware and software
Interchangeability generally describes each exemplary composition and step according to function in the above description.These functions are actually
It is performed with hardware or software mode, specific application and design constraint depending on technical solution.Professional technician
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
The scope of the present invention.
A kind of voice coil motor provided by the present invention and camera module are described in detail above.It is used herein
Specific case is set forth the principle of the present invention and embodiment, to understand the explanation of above example is only intended to helping
The method and its core concept of the present invention.It should be pointed out that for those skilled in the art, this is not being departed from
On the premise of inventive principle, can also to the present invention some improvement and modification can also be carried out, these improvement and modification also fall into the present invention
In scope of the claims.
Claims (7)
1. a kind of voice coil motor, which is characterized in that including：
Solenoid and the magnetic conductive metal core of no magnetic, the magnetic conductive metal core are arranged on inside the solenoid, so that in the spiral shell
When coil is powered, the magnetic conductive metal core is magnetized and generates magnetic field.
2. voice coil motor according to claim 1, which is characterized in that further include：
Degaussing gear, in voice coil motor off position, eliminating the magnetism of the magnetic conductive metal core.
3. voice coil motor according to claim 2, which is characterized in that the degaussing gear is heating degaussing gear.
4. voice coil motor according to claim 3, which is characterized in that further include：
Temperature-detecting device, for detecting the temperature of voice coil motor.
5. voice coil motor according to any one of claims 1 to 4, which is characterized in that the magnetic conductive metal core is iron core
Or dilval.
6. voice coil motor according to claim 5, which is characterized in that further include：
Alarm, for when the temperature of voice coil motor is more than predetermined threshold value, carrying out alarm.
7. a kind of camera module, which is characterized in that including the voice coil motor as described in claim 1-5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711432577.XA CN108092484A (en) | 2017-12-26 | 2017-12-26 | A kind of voice coil motor and camera module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711432577.XA CN108092484A (en) | 2017-12-26 | 2017-12-26 | A kind of voice coil motor and camera module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108092484A true CN108092484A (en) | 2018-05-29 |
Family
ID=62179200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711432577.XA Pending CN108092484A (en) | 2017-12-26 | 2017-12-26 | A kind of voice coil motor and camera module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108092484A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112099181A (en) * | 2020-11-20 | 2020-12-18 | 基合半导体（宁波）有限公司 | Lens driving device and imaging device |
| CN112994574A (en) * | 2019-12-13 | 2021-06-18 | 点晶科技股份有限公司 | Voice coil motor driving device and control signal providing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594037A (en) * | 2011-01-13 | 2012-07-18 | 三菱综合材料株式会社 | Method for recycling motor |
| CN104753189A (en) * | 2015-03-29 | 2015-07-01 | 张英华 | Differential-temperature magnetic-switch motor and control method |
| CN105959516A (en) * | 2016-05-05 | 2016-09-21 | 信利光电股份有限公司 | Voice coil motor, camera module and electronic equipment |
-
2017
- 2017-12-26 CN CN201711432577.XA patent/CN108092484A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594037A (en) * | 2011-01-13 | 2012-07-18 | 三菱综合材料株式会社 | Method for recycling motor |
| CN104753189A (en) * | 2015-03-29 | 2015-07-01 | 张英华 | Differential-temperature magnetic-switch motor and control method |
| CN105959516A (en) * | 2016-05-05 | 2016-09-21 | 信利光电股份有限公司 | Voice coil motor, camera module and electronic equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112994574A (en) * | 2019-12-13 | 2021-06-18 | 点晶科技股份有限公司 | Voice coil motor driving device and control signal providing method |
| CN112099181A (en) * | 2020-11-20 | 2020-12-18 | 基合半导体（宁波）有限公司 | Lens driving device and imaging device |
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Application publication date: 20180529 |