CN108512395B - Voice coil motor - Google Patents
Voice coil motor Download PDFInfo
- Publication number
- CN108512395B CN108512395B CN201711270025.3A CN201711270025A CN108512395B CN 108512395 B CN108512395 B CN 108512395B CN 201711270025 A CN201711270025 A CN 201711270025A CN 108512395 B CN108512395 B CN 108512395B
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- China
- Prior art keywords
- voice coil
- retainer
- coil motor
- rotary shaft
- fixed frame
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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
Abstract
The present invention provides a kind of voice coil motors, comprising: mover assembly, mover assembly include rotary shaft, the retainer being perpendicularly fixed in rotary shaft, and are respectively arranged on the coil of retainer opposite end, and coil is axial axially parallel with rotary shaft；Stator module, stator module include being sheathed in rotary shaft and the fixed frame parallel with retainer, and multiple magnets on fixed frame and for driving the coil after being powered dynamic around rotating shaft center's string pendulum, multiple magnets are located on same circumference.Voice coil motor provided by the invention, by the setting that mover assembly and stator module are parallel to each other, so that the axial dimension of entire voice coil motor significantly reduces, so that the voice coil motor can be applied in the product of flat structure, the scope of application is wider.
Description
Technical field
The invention belongs to technical field of motors, are to be related to a kind of voice coil motor more specifically.
Background technique
With the continuous improvement of the performance requirement to high-speed, high precision positioning system and driving power, voice coil motor is answered extensively
For in the fields such as disk, laser positioning, optical system lens positioning, accurate Medical Instruments.
Voice coil motor is a kind of direct-driving motor of special shape, has the spies such as small structure, high speed, high booster response
Property.Its working principle is that hot-wire coil generates power in magnetic field, the size of power and proportional by the electric current on coil.It is based on
The voice coil motor of this principle has straight line and swings two kinds of forms of motion.
For voice coil motor in the prior art based on linear drives, structure is the magnetic that tubular coil is placed in radial magnetic field
In property cylinder, mover moving direction is identical as coil windings rotary shaft.Such voice coil motor and traditional rotating electric machine all have
Cylindrical appearance, longer axial length.But due to such voice coil motor have longer axial length so that its
There is apparent limitation in the application of flat structure product.
Summary of the invention
The purpose of the present invention is to provide a kind of voice coil motor, with solve voice coil motor existing in the prior art have compared with
Long axial length causes application of the voice coil motor in flat structure product to have the technical issues of obvious limitation.
To achieve the above object, the technical solution adopted by the present invention is that: provide a kind of voice coil motor, comprising:
Mover assembly, the mover assembly include rotary shaft, the retainer being perpendicularly fixed in the rotary shaft, Yi Jifen
Not She Yu the retainer opposite end coil, the coil is axial axially parallel with the rotary shaft；
Stator module, the stator module include being sheathed on fixation in the rotary shaft and parallel with the retainer
Frame, and on the fixed frame and for driving the coil after being powered around dynamic multiple of rotating shaft center's string pendulum
Magnet, multiple magnets are located on same circumference.
Further, offered on the retainer axially through coil bore, the coil is installed on the coil bore
In.
Further, the opposite end of the fixed frame offer axially through magnet chamber, in each magnet chamber
It is mounted on the two circumferentially opposite magnets of arranged side by side and magnetic pole, and two institutes that the relatively described rotary shaft is centrosymmetric
The magnetic pole for stating magnet is identical.
Further, it is also provided on the retainer and communicates and be used for that the coil is led to institute with the coil bore
State the wire casing outside voice coil motor.
Further, the retainer is equipped with for exporting the pendulum motion of the retainer to the voice coil motor
External output shelf.
Further, it is additionally provided between the retainer and the fixed frame for limiting the retainer swing angle
Circumferential position limiting structure, and the axial limit structure for limiting the retainer axial displacement.
Further, the voice coil motor includes two stator modules, and two stator modules are along the rotary shaft axis
To the two sides for being held on the mover assembly respectively.
Further, the outer side wall of the stator module is equipped with the shell with magnetic screening action.
Further, the voice coil motor further includes the angle for the practical swing angle of mover assembly described in real-time detection
Inductor.
Further, the angle inductor includes in the rotary shaft and with the magnetism of rotary shaft rotation
Part, and the sensing element on the shell and for incuding the magnetic part changes of magnetic field.
The beneficial effect of voice coil motor provided by the invention is: compared with prior art, voice coil motor of the invention is logical
It crosses and retainer is perpendicularly fixed in rotary shaft, fixed frame is sheathed in rotary shaft and is arranged in parallel with retainer, and make
The axial direction of coil is axially parallel with rotary shaft, so that the coil after conducting electric current generates axial magnetic field, axial magnetic field
Interaction just is generated with the magnet on fixed frame, according to the principle that homopolarity is mutually exclusive, it is heteropolar to attract each other, it is located at same
The magnetic field that magnet on circumference jointly generates coil acts on, so that coil can be dynamic around rotating shaft center's string pendulum, into
And mover assembly is swung.Voice coil motor of the invention is made by the setting that mover assembly and stator module are parallel to each other
The axial dimension for obtaining entire voice coil motor significantly reduces, so that the voice coil motor can be applied to the product of flat structure
In, the scope of application is wider.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the stereoscopic schematic diagram of voice coil motor provided in an embodiment of the present invention；
Fig. 2 is longitudinal schematic cross-sectional view of Fig. 1；
Fig. 3 is the lateral schematic cross-sectional view of Fig. 1；
Fig. 4 is the structural schematic diagram of the mover assembly in Fig. 1；
Fig. 5 is the structural schematic diagram of two stator modules installation in Fig. 1；
Fig. 6 is the operation schematic diagram of the upper motor in Fig. 1；
Fig. 7 is the structural schematic diagram of the shell in Fig. 1.
Wherein, each appended drawing reference in figure:
1- mover assembly；2- stator module；3- circumferential direction position limiting structure；4- axial limit structure；5- shell；6- angle sense
Answer device；11- rotary shaft；12- retainer；13- coil；20- accommodating chamber；21- fixed frame；22- magnet；31- limit hole；32- limit
Position column；41- roller bearing；42- roll sleeve；51- first shell；52- second shell；61- magnetic part；62-PCB plate；63- condom；
64- housing；121- coil bore；122- wire casing；123- output shelf；124- convex block；221- magnet chamber；420- concave ring；511- accommodating
Chamber；The first sheet body of 512-；The second sheet body of 513-；514- third sheet body；The 4th sheet body of 521-；The 5th sheet body of 522-；1230-U type
Slot；1231- positioning column；1232- threaded hole.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
Also referring to Fig. 1 to Fig. 6, now voice coil motor provided by the invention is illustrated.The voice coil motor includes dynamic
Sub-component 1 and stator module 2, mover assembly 1 include rotary shaft 11, retainer 12 and two coils 13, retainer 12 in flat,
Retainer 12 is fixed in rotary shaft 11 and is vertically arranged with rotary shaft 11, and retainer 12 is center line or so pair with rotary shaft 11
Claiming setting, two coils 13 are respectively arranged on 12 opposite end of retainer, i.e. the left and right ends that two coils 13 are respectively arranged on retainer 12,
Two coil 13 is axial axial parallel with rotary shaft 11.Stator module 2 includes fixed frame 21 and multiple magnets 22, fixed frame 21
In flat, fixed frame 21 is sheathed in rotary shaft 11 and is arranged in parallel with retainer 12, and multiple magnets 22 are set to fixed frame 21
Upper to be located on same circumference, multiple magnets 22 are used to drive the coil 13 after being powered to swing around 11 center line of rotary shaft.The present invention
Voice coil motor working principle it is as follows: two coils 13 are electrified stream respectively first so that coil 13 generate pole orientation be
Axial magnetic field, the magnetic field can interact with magnet 22, swing coil 13 around 11 center line of rotary shaft,
To drive entire mover assembly 1 to swing around 11 center line of rotary shaft.
Voice coil motor provided by the invention, compared with prior art, voice coil motor of the invention is by hanging down retainer 12
It is directly fixed in rotary shaft 11, fixed frame 21 is sheathed in rotary shaft 11 and is arranged in parallel with retainer 12, and make coil
13 axial direction is axial parallel with rotary shaft 11, so that the coil 13 after conducting electric current generates axial magnetic field, axial magnetic
Field just generates interaction with the magnet 22 on fixed frame 21, according to the principle that homopolarity is mutually exclusive, heteropolar to attract each other, position
It is acted in the magnetic field that the magnet 22 on same circumference jointly generates coil 13, so that coil 13 can be around rotary shaft
11 center lines are swung, so that mover assembly 1 is swung.Voice coil motor of the invention, by by mover assembly 1 and stator module
2 settings being parallel to each other, so that the axial dimension of entire voice coil motor significantly reduces, so that the voice coil motor can answer
For in the product of flat structure, the scope of application to be wider.
Further, Fig. 2 and Fig. 4 is please referred to, as a kind of specific embodiment of voice coil motor provided by the invention, on
It states and offers two coil bores 121 on retainer 12, two coil bores 121 are located at the opposite end of retainer 12, and coil bore
121 accommodate and are installed in coil bore 121 axially through retainer 12, coil 13.In embodiments of the present invention, coil 13 includes
Bobbin winder bracket and coiling, bobbin winder bracket are installed in coil bore 121, and coiling is set around on bobbin winder bracket, and the axial direction and rotary shaft of coiling
11 axial direction is identical, i.e. the pole orientation of coiling generation is identical as the axial direction of rotary shaft 11.
Further, Fig. 5 and Fig. 6 is please referred to, as a kind of specific embodiment of voice coil motor provided by the invention, on
State fixed frame 21 opposite end offer axially through magnet chamber 221, magnet chamber 221 is fan-shaped and with rotary shaft 11
Center line centered on, magnet 22 in the form of sheets, is mounted on two and is circumferentially arranged side by side and magnetic pole is opposite in each magnet chamber 221
Magnet 22, i.e., be equipped with four magnets 22 on same fixed frame 21, and two magnets 22 that are centrosymmetric of relative rotation axi 11
Magnetic pole is identical.Specifically, referring to Fig. 6, by be located at rear side stator module 2 for, if upper left magnet 22 is close to coil
The magnetic pole of 13 side is the pole S, then lower left is the pole N, and upper right side is the pole N, and lower right is the pole S, at this point, if the coil 13 in left side
Logical clockwise electric current, then it is the pole S that the magnetic pole of coil 13, which is front, and the magnetic pole close to rear side magnet 22 is the pole N, according to homopolarity
Mutually exclusive, the heteropolar principle to attract each other, left side coil 13 will be attracted by the magnet 22 of lower left, by upper left magnetic
Body 22 repels, so that left side coil 13 will move down, meanwhile, the coil 13 on right side can also lead to clockwise electric current, because
22 magnetic pole of magnet of the left and right sides is just on the contrary, therefore the coil 13 on right side will move up, so that entire retainer
12 even entire mover assemblies 1 generate swing counterclockwise.
Further, referring to Fig. 4, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned guarantor
It holds and is also provided with wire casing 122 on frame 12, wire casing 122 is communicated with the coil bore 121 of the left and right sides respectively and extended to and retainer
12 outsides communicate, and wire casing 122 is for leading to coil 13 outside voice coil motor.Specifically, the front and back two of above-mentioned retainer 12
Side offers wire casing 122, and the wire casing 122 that the both ends of coil 13 pass through two sides on retainer 12 respectively is connected to outside voice coil motor
Portion.The present invention by the setting of wire casing 122 so that will not because of coil 13 disorder and in entire voice coil motor in assembling
It is cumbersome, while but also the structure of entire voice coil motor is neat and compact, while wire casing 122 plays protection to coil 13 and makees
With, it is therefore prevented that other structures generate destruction to coil 13 when because of voice coil motor work, and then prevent because of 13 poor contact of coil
And entire voice coil motor is caused to stop working.
Further, referring to Fig. 4, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned guarantor
Frame 12 is held equipped with output shelf 123, output shelf 123 is for exporting the pendulum motion of retainer 12 to voice coil motor.Tool
Body, referring to Fig. 2, output shelf 123 is for bilateral symmetry and set on the surface of rotary shaft 11, output shelf 123 and holding
Frame 12 is integrally formed, and the U-type groove 1230 of opening upwards, the transverse extension direction and rotation of U-lag 1230 are offered in output shelf 123
Shaft 11 is identical, and the bottom of U-type groove 1230 is equipped with positioning column 1231, and the side wall of U-type groove 1230 is equipped with threaded hole 1232, uses
When, it will need in driven driven member location and installation and output shelf 123, then when retainer 12 carries out the clockwise or inverse time
When needle is swung, driven member can also generate swing clockwise or counterclockwise, thus by movement output.In addition, above-mentioned wire casing 122
Output shelf 123 is extended to from coil bore 121, and two sides extend to end forwards, backwards from the bottom of output shelf 123.
In some other embodiment of the invention, above-mentioned output shelf 123 is not to be integrally formed with retainer 12, output shelf
123 are fixedly installed on retainer 12 by fastener, in this way, single output shelf 123 and the processing technology of retainer 12 are more
Simply, it and when some structural failure in retainer 12 or output shelf 123, all only needs to tie up that of damage
It repairs, so that the later period maintenance of entire voice coil motor is convenient.
In some other embodiment of the invention, the pendulum motion of above-mentioned retainer 12 can also be defeated by rotary shaft 11
Out to outside voice coil motor, at this time, it is only necessary to be designed to rotary shaft 11 to extend out to voice coil motor outside.Certainly, this hair
Bright purpose is the axial dimension for reducing entire voice coil motor, and therefore, present invention preferably employs the modes of output shelf 123 to be transported
Dynamic output.
Further, referring to Fig. 2, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned sound
Circle motor further includes circumferential position limiting structure 3, and circumferential position limiting structure 3 is set between retainer 12 and fixed frame 21, circumferential limit knot
Structure 3 is used to limit the swing angle of retainer 12.By the setting of circumferential position limiting structure 3, so that the amplitude of fluctuation of retainer 12
Within the scope of certain, and then guarantee the amplitude of fluctuation of driven member also within the scope of certain.
Specifically, above-mentioned circumferential direction position limiting structure 3 includes limit hole 31 and limited post 32, limit hole 31 is opened in retainer 12
On, limit hole 31 is in kidney-shaped, and limit hole 31 is located at the inside of coil bore 121, and limited post 32 is set on fixed frame 21, limited post
32 backstops are between opposite two inner sidewalls of limit hole 31.When retainer 12 is rocked to upper limit position, limited post 32 and limit
The downside inner wall contact in position hole 31, when retainer 12 is rocked to lower limit position, in the upside of limited post 32 and limit hole 31
Contact, so that retainer 12 can not limit swing.Certainly, in other embodiments of the invention, according to the actual situation and
Specific requirement, above-mentioned limit hole 31 can also be opened on fixed frame 21, and above-mentioned limited post 32 is then set on retainer 12, works as guarantor
When holding frame 12 and being rocked to upper limit position, limited post 32 is contacted with the upper inside walls of limit hole 31, when retainer 12 is rocked to down
When extreme position, limited post 32 is contacted with the downside inner wall of limit hole 31, so that retainer 12 can not limit swing.
Further, please refer to figs. 2 and 3, as a kind of specific embodiment of voice coil motor provided by the invention, on
Stating voice coil motor further includes axial limit structure 4, and axial limit structure 4 is set between retainer 12 and fixed frame 21, axial to limit
Bit architecture 4 is for limiting 12 axial displacement of retainer.Preferably, above-mentioned voice coil motor includes two axial limit structures 4, and two is axial
Position limiting structure 4 is respectively arranged on the opposite end of mover assembly 1, and it is opposite to limit mover assembly 1 respectively by two axial limit structures 4
The axial wobble at both ends, to further improve the kinetic stability and running accuracy of mover assembly 1.Specifically, above-mentioned
Axial limit structure 4 includes roller bearing 41 and roll sleeve 42, and roller bearing 41 is optical axis, and 41 both ends of roller bearing are individually fixed in a fixed frame 21
On, roller bearing 41 is arranged in parallel with rotary shaft 11, i.e., roller bearing 41 is vertically arranged with fixed frame 21 and retainer 12 respectively, roll sleeve 42
It is sheathed on roller bearing 41, roll sleeve 42 and 12 end of retainer form and be clamped to limit the axial displacement of retainer 12.
Preferably, referring to Fig. 3, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned roll sleeve
42 is cylindrical, and the outer surface of roll sleeve 42 circumferentially offers concave ring 420, referring to Fig. 3, concave ring 420 is located in roll sleeve 42
Between position, the upper inside walls 4201 and downside inner wall 4202 of concave ring 420 are vertical with roller bearing 41, and 12 end of retainer is convexly equipped with convex
Block 124, the axial sides difference backstop of convex block 124 is in axial sides inner wall (the i.e. upper inside walls of concave ring 420 of concave ring 420
4201 and downside inner wall 4202), in this way, but retainer 12 will not produce in the axial direction even if retainer 12 has rotary motion
It is raw to swing displacement, to ensure that the kinetic stability and running accuracy of mover assembly 1.
Preferably, in some other embodiment of the invention, above-mentioned roll sleeve 42 is cylindrical, the outer surface of roll sleeve 42
It is circumferentially convexly equipped with bulge loop, bulge loop is located at the middle position of roll sleeve 42, and the upper side of bulge loop and downside are vertical with roller bearing 41,
12 end of retainer is recessed fluted, and (i.e. bulge loop is upper in the axial sides of bulge loop for the axial sides inner wall difference backstop of groove
Side and downside), in this way, even if retainer 12 has rotary motion, but retainer 12 will not generate swing in the axial direction
Displacement, to ensure that the kinetic stability and running accuracy of mover assembly 1.
Further, referring to Fig. 3, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned sound
Enclosing motor includes two stator modules 2, and two stator modules 2 are along the axial two sides for being held on mover assembly 1 respectively of rotary shaft 11.Specifically
, the structure of two stator modules 2 is identical and front and back is symmetrical arranged, and two stator modules 2 are fixed together by multiple pins, and two is fixed
After being stacked at together before and after sub-component 2, centre forms an accommodating chamber 20, and accommodating chamber 20 has top opening, mover group
Part 1 is contained in accommodating chamber 20, and output shelf 123 extend out to outside from top open part.Further, it should be noted that two is fixed
The magnet 22 of sub-component 2 is not that front and back is symmetrically arranged, but is arranged in parallel, and be that is to say, four on front side stator module 2
A magnet 22 translates backward to obtain four magnets 22 on rear side stator module 2, so, it is ensured that be electrified in coil 13
After stream, the magnetic pole in 13 front and back symmetric position of coil is opposite, to guarantee that the both ends magnetic pole of coil 13 is inhaled
Draw or is ostracised.The present invention passes through the setting of two stator modules 2, so that the magnet 22 on stator module 2 is to coil 13
Effect is double, and then ensure that operating accuracy and the sensitivity of entire voice coil motor.
Further, Fig. 1 and Fig. 7 is please referred to, as a kind of specific embodiment of voice coil motor provided by the invention, on
The outside for stating stator module 2, which is also enclosed, is equipped with the shell 5 with magnetic screening action.Specifically, above-mentioned shell 5 includes pedestal 51 and top
Lid 52, pedestal 51 have accommodating cavity 511, accommodating cavity 511 it is opening up, stator module 2 and mover assembly 1 are contained in accommodating cavity
In 511, top cover 52 is covered on pedestal 51, and top cover 52 is fixed on pedestal 51 by fasteners such as screws.
Further, referring to Fig. 7, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned bottom
Seat 51 includes the first sheet body 512, the second sheet body 513 and third sheet body 514, and the first sheet body 512 and the second sheet body 513 are along rotary shaft
11 axially opposite sides are respectively coated by 21 outside of fixed frame, and third sheet body 514 is connected to the first sheet body 512 and the second sheet body
It is oppositely arranged between 513 and with top cover 52, top cover 52 is connected between the first sheet body 512 and the second sheet body 513 by fastener.
The present invention is by being respectively arranged on 2 outside of stator module for the first sheet body 512, the second sheet body 513, third sheet body 514 and top cover 52
The position of possible leakage field, to prevent 1 leakage field of stator module 2 and mover assembly.In embodiments of the present invention, above-mentioned first sheet body
512, the second sheet body 513 and third sheet body 514 are integrally formed, and processing technology is simple, at low cost.Certainly, in of the invention its
In his embodiment, above-mentioned first sheet body 512, the second sheet body 513 and third sheet body 514 are also possible to individually form, then
It is attached by fastener, so can be convenient subsequent maintenance.
Further, referring to Fig. 7, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned top
Lid 52 includes the 4th sheet body 521 and the 5th sheet body 522, and the 4th sheet body 521 and the 5th sheet body 522 are located at 123 liang of output shelf
Side that is to say top opening two sides, hereafter can be seen that from the application top opening be for for output shelf 123 stretch out, because
This top cover 52 needs to be staggered output shelf 123, while magnetic field can not be allowed to reveal from the top of voice coil motor.
Preferably as a kind of specific embodiment of voice coil motor provided by the invention, above-mentioned pedestal 51 and top cover 52
It is all made of metal to be made, i.e. the first sheet body 512, the second sheet body 513, third sheet body 514, the 4th sheet body 521 and the 5th sheet body 522
It is sheet metal, metal not only has preferable shielding action, and processing and forming technology is simple, and pedestal is using Sheet Metal Forming Technology
Can, it is easy to process and at low cost.Certainly, in other embodiments of the invention, according to the actual situation and specific requirement, above-mentioned bottom
Seat and top cover can also be made of other materials, as long as having good shielding action, and processing technology is simple, herein
Unique restriction is not done.
Further, referring to Fig. 3, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned sound
Circle motor further includes angle inductor 6, and angle inductor 6 is used for the practical rotation angle of real-time detection mover assembly 1, passes through angle
Inductor 6 is spent by the practical rotation angle conversion processing of mover assembly 1 at electric signal, to realize the practical rotation angle of voice coil motor
The Real-time Feedback of degree, and then complete input driving current, voice coil motor rotation (or swing), the practical rotation angle of induction, feedback
The closed-loop control of practical rotation angle and compensation rotation angular error.
Further, referring to Fig. 3, a kind of specific embodiment as voice coil motor provided by the invention, above-mentioned angle
Spending inductor 6 includes magnetic part 61 and sensing element, and magnetic part 61 is set in rotary shaft 11 and rotates with rotary shaft 11, specifically
, one end of rotary shaft 11 is arranged with installation set 63, and one end setting of rotary shaft 11 is arranged installation set 63 in flat to facilitate,
There is cavity, magnetic part 61 is placed in installation set 63 in installation set 63.Sensing element is set on shell 5 and is used for induced magnetism
61 changes of magnetic field of part, specifically, sensing element is set on a pcb board 62 and is electrically connected with pcb board 62, pcb board 62 passes through outside one
Set 64 is fixed on shell 5, and makes have certain interval not contact with each other between sensing element and magnetic part 61, in this way, working as
When magnetic part 61 is rotated with rotary shaft 11, the magnetic field of surrounding is driven to change, the variation in magnetic field is passed through electricity by sensing element
Magnetic induction principle conversion processing is electric signal, to realize the Real-time Feedback of the practical rotation angle of voice coil motor, and then is completed defeated
Enter driving current, voice coil motor rotation (or swing), the practical rotation angle of induction, the practical rotation angle of feedback and compensation rotation angle
Spend the closed-loop control of error.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. voice coil motor characterized by comprising
Mover assembly, the mover assembly include rotary shaft, the retainer being perpendicularly fixed in the rotary shaft, and are set respectively
In the coil of the retainer opposite end, the coil is axial axially parallel with the rotary shaft；
Stator module, the stator module include being sheathed on fixed frame in the rotary shaft and parallel with the retainer, with
And multiple magnets on the fixed frame and for driving the coil after being powered to move around rotating shaft center's string pendulum,
Multiple magnets are located on same circumference.
2. voice coil motor as described in claim 1, which is characterized in that offered on the retainer axial along the retainer
The coil bore of perforation, the coil are installed in the coil bore.
3. voice coil motor as claimed in claim 2, which is characterized in that the opposite end of the fixed frame is offered along described
Fixed frame axially through magnet chamber, two are mounted in each magnet chamber and is circumferentially arranged side by side and that magnetic pole is opposite is described
Magnet, and the magnetic pole of two magnets that the relatively described rotary shaft is centrosymmetric is identical.
4. voice coil motor as claimed in claim 2, which is characterized in that be also provided on the retainer and the coil bore phase
Lead to and is used to leading to the coil into the wire casing outside the voice coil motor.
5. voice coil motor as claimed in claim 4, which is characterized in that the retainer is equipped with for by the retainer
Pendulum motion is exported to the output shelf outside the voice coil motor.
6. voice coil motor as described in claim 1, which is characterized in that be additionally provided with use between the retainer and the fixed frame
In the circumferential position limiting structure for limiting the retainer swing angle, and the axial limit for limiting the retainer axial displacement
Bit architecture.
7. voice coil motor as described in claim 1, which is characterized in that the voice coil motor include two stator modules, two
The stator module is axially held on the two sides of the mover assembly along the rotary shaft respectively.
8. voice coil motor as claimed in claim 7, which is characterized in that the outer side wall of the stator module, which is equipped with, has magnetic screen
The shell of effect.
9. voice coil motor as claimed in claim 8, which is characterized in that the voice coil motor further includes for described in real-time detection
The angle inductor of the practical swing angle of mover assembly.
10. voice coil motor as claimed in claim 9, which is characterized in that the angle inductor includes being set to the rotary shaft
Magnetic part upper and with rotary shaft rotation, and on the shell and for incuding the magnetic part changes of magnetic field
Sensing element.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711270025.3A CN108512395B (en) | 2017-12-05 | 2017-12-05 | Voice coil motor |
| PCT/CN2018/080225 WO2019109545A1 (en) | 2017-12-05 | 2018-03-23 | Voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711270025.3A CN108512395B (en) | 2017-12-05 | 2017-12-05 | Voice coil motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108512395A CN108512395A (en) | 2018-09-07 |
| CN108512395B true CN108512395B (en) | 2019-09-17 |
Family
ID=63374699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711270025.3A Active CN108512395B (en) | 2017-12-05 | 2017-12-05 | Voice coil motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108512395B (en) |
| WO (1) | WO2019109545A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0460971A (en) * | 1990-06-26 | 1992-02-26 | Nec Ibaraki Ltd | Magnetic circuit for magnetic head driving device |
| CN1255762A (en) * | 1998-11-27 | 2000-06-07 | 东京零件工业株式会社 | Flat coreless vibrating electricmachine with printed circuit converter |
| KR20030020787A (en) * | 2001-09-04 | 2003-03-10 | 한국과학기술원 | A Fine Actuator Stage Using Moving Magnet Type Of VCM |
| WO2004038741A1 (en) * | 2002-10-21 | 2004-05-06 | Bei Sensors And Systems Company, Inc. | Flat linear voice coil actuator with planar coils and a spring-type characteristic |
| CN204179913U (en) * | 2014-09-09 | 2015-02-25 | 雅科贝思精密机电(上海)有限公司 | A kind of motor module with rotary motion |
| CN207625426U (en) * | 2017-12-05 | 2018-07-17 | 深圳市兆威机电股份有限公司 | Voice coil motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532334A (en) * | 2013-11-06 | 2014-01-22 | 哈尔滨工业大学 | Limited-angle voice coil motor capable of allowing rotor to rotate at 360 degrees |
| CN104953788B (en) * | 2014-03-24 | 2018-01-26 | 上海微电子装备（集团）股份有限公司 | A kind of plate voice coil motor |
-
2017
- 2017-12-05 CN CN201711270025.3A patent/CN108512395B/en active Active
-
2018
- 2018-03-23 WO PCT/CN2018/080225 patent/WO2019109545A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0460971A (en) * | 1990-06-26 | 1992-02-26 | Nec Ibaraki Ltd | Magnetic circuit for magnetic head driving device |
| CN1255762A (en) * | 1998-11-27 | 2000-06-07 | 东京零件工业株式会社 | Flat coreless vibrating electricmachine with printed circuit converter |
| KR20030020787A (en) * | 2001-09-04 | 2003-03-10 | 한국과학기술원 | A Fine Actuator Stage Using Moving Magnet Type Of VCM |
| WO2004038741A1 (en) * | 2002-10-21 | 2004-05-06 | Bei Sensors And Systems Company, Inc. | Flat linear voice coil actuator with planar coils and a spring-type characteristic |
| CN204179913U (en) * | 2014-09-09 | 2015-02-25 | 雅科贝思精密机电(上海)有限公司 | A kind of motor module with rotary motion |
| CN207625426U (en) * | 2017-12-05 | 2018-07-17 | 深圳市兆威机电股份有限公司 | Voice coil motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019109545A1 (en) | 2019-06-13 |
| CN108512395A (en) | 2018-09-07 |
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