CN207283347U - A kind of structure for sensing voice coil motor movement locus - Google Patents
A kind of structure for sensing voice coil motor movement locus Download PDFInfo
- Publication number
- CN207283347U CN207283347U CN201721274649.8U CN201721274649U CN207283347U CN 207283347 U CN207283347 U CN 207283347U CN 201721274649 U CN201721274649 U CN 201721274649U CN 207283347 U CN207283347 U CN 207283347U
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- stent
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- voice coil
- coil motor
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Abstract
The utility model discloses a kind of structure for sensing voice coil motor movement locus, the voice coil motor includes at least yoke plate, upper cover, coil, drive magnet, stent, and base, the voice coil motor further includes a circuit board for being fixedly arranged on yoke plate inner wall, circuit board includes the injection molding plates of PET wiring boards and a fixation PET wiring boards, the PET wiring boards are equipped with Hall IC chip and the capacitance in parallel with Hall IC chip, the side that the stent corresponds to the Hall IC chip is equipped with the feedback magnet coordinated with Hall IC chip, the coil is around being located at outside stent, the drive magnet is arranged on the periphery of coil, and do not interfere with feedback magnet.Drive magnet plays the role of driving the camera lens being arranged in stent vertical movement to focus with coil, and feedback magnet plays the role of the size of current to negative-feedback regu- lation input coil with Hall IC chip, so that the movement locus of stent and camera lens is more accurate.The utility model cost is low, and performance is stablized.
Description
Technical field
A kind of voice coil motor is the utility model is related to, particularly relates to a kind of structure for sensing voice coil motor movement locus.
Background technology
Now with the development of science and technology, with take pictures, the digital equipment of camera function obtain widely popularization use, and on
Equipment is stated usually with the function of focusing.
A kind of existing closed loop voice coil motor, drives lens by coil and the magnetic field interaction of magnet generation, makes
Lens can be moved in vertical direction, and so as to fulfill the focus adjustment function of camera lens, and its coil is fixed, and magnet is dynamic
, the magnetic field intensity of difference can change when magnet is in vertical motion in vertical direction, by fixing and mutually interconnecting
Change of the pcb board and Hall element connect to the magnetic field intensity is sensed and carries out feedback fortune by the induced electricity stream of generation
Calculate, so as to fulfill the feedback regulation effect to the driving device.
Also it is feedback magnet but above-mentioned closed loop voice coil motor is since magnet is dynamic, not only drive magnet, so meeting
There is magnetic field produced by electric current in Hall element the magnetic fields of drive magnet are influenced, the distance of drive magnet and Hall element
The factors such as the influence produced too far are so as to cause driving and feedback procedure all to produce error.Furthermore existing voice coil motor
Circuit board is designed using FPC circuit boards, its complex process, high processing costs.
In view of this, the designer in the design of above-mentioned voice coil motor for not attaining many missings and not caused by improving
Just, deeply conceive, and actively research improvement has a fling at and develops and design the utility model.
Utility model content
The purpose of this utility model is to provide a kind of structure of the low sensing voice coil motor movement locus of cost.
In order to achieve the above objectives, the solution of the utility model is：
A kind of structure for sensing voice coil motor movement locus, the voice coil motor include at least a yoke plate, a upper cover, a line
Circle, an at least drive magnet, a stent and a base, yoke plate are in be combined together up and down with base, the upper cover, coil, drive
Moving magnet and stent are arranged on yoke plate and in base, which further includes a circuit board for being fixedly arranged on yoke plate inner wall, circuit
Plate includes the injection molding plates of PET wiring boards and a fixation PET wiring boards, which is equipped with Hall IC chip and and Hall
The capacitance of IC chip parallel connection, the side that the stent corresponds to the Hall IC chip are equipped with a feedback coordinated with Hall IC chip
Magnet, for the coil around being located at outside stent, the drive magnet is arranged on the periphery of coil, and does not interfere with feedback magnet.
Further, the circuit of PET wiring boards is that conductive glue is printed in PET film to be formed, and is had on the PET wiring boards
There is a solder joint welded for Hall IC chip and capacitance 94, one end of PET wiring boards and base engagement is printed with external pin, external
Pin is connected with external control unit outside, which is fixed on the injection molding plates, is welded again after bond pad locations are fixed
Connect Hall IC chip and capacitance.
Further, the injection molding plates are fixed on the one end for setting Hall IC chip and capacitance, which corresponds to Hall IC
A storage tank is respectively equipped with the position of chip and capacitance.
Further, be equipped with a short slot at the position of the upper cover corresponding circuits plate, the injection molding plates of the circuit board be equipped with
The convex block that short slot coordinates.
Further, the feedback magnet is shaped in the side of the stent corresponding circuits plate.
Further, the moulding process of the feedback magnet is that manually or automatically mode is fixed on by magnet embryo material
In the mould of injection molding support, then the ejection formation being molded, the product after shaping carry out operation of magnetizing again.
Further, the moulding process of the feedback magnet is the mould that will have magnetic magnet and be fixed on injection molding support
Injection molding is carried out in tool, the high temperature that injection molding produces is more than 300 °, and the time, the influence to magnetism was very more than 10 seconds
Greatly, it is necessary to which secondary after formed product injection magnetize.
Further, the voice coil motor also buckles shrapnel and lower shrapnel cruelly, and upper shrapnel is arranged on the top surface and upper cover of stent
Between, lower shrapnel is arranged between the top surface of base and the bottom surface of stent.
Further, the yoke plate and stent are rectangular configuration, which corresponds in one side wall of the yoke plate equipped with circuit board
The feedback magnet is coated with, the drive magnet includes two, and the periphery for being arranged on coil corresponds to the adjacent feedback magnetic of stent
Outside the two side walls of iron.
With the above structure, the structure of the utility model sensing voice coil motor movement locus is that circuit board is fixed on yoke
Set Hall IC chip corresponding with the feedback magnet being coated in stent on the inner wall of plate, on circuit board, drive magnet and line
Enclose the effect that focuses of camera lens vertical movement that driving is arranged in stent, feedback magnet and Hall IC chip play pair
The effect of the size of current of negative-feedback regu- lation input coil, so that the movement locus of stent and camera lens is more accurate.Particularly,
The circuit board of the utility model is to be fixed on using PET wiring boards on injection molding plates, compared to existing PCB or FPC circuit boards, its
Technique is simpler, and cost can be greatly lowered.The feedback magnetic that the utility model will further coordinate with Hall IC chip
Iron is directly coated on stent and corresponds at the position of Hall IC chip, without the close-fitting degree for considering assembly precision and being combined with stent,
Feedback magnet can be avoided to be separated with stent and cause scrapping for voice coil motor, except that can ensure the steady of the voice coil motor feedback circuit
It is fixed, product yield can be also improved, further reduces the cost expenditure.
Brief description of the drawings
Fig. 1 is the three-dimensional exploded view one of the utility model preferred embodiment.
Fig. 2 is the three-dimensional exploded view two of the utility model preferred embodiment.
Fig. 3 is the top view of the utility model preferred embodiment.
Fig. 4 is the sectional view of Fig. 3.
Fig. 5 is the top view that Fig. 3 removes shell.
Fig. 6 is the side view of Fig. 5.
Fig. 7 is the exploded view one of the utility model preferred embodiment circuit board.
Fig. 8 is the exploded view two of the utility model preferred embodiment circuit board.
Embodiment
In order to which the technical solution of the utility model is explained further, below by specific embodiment come to the utility model into
Row elaborates.
As shown in Figures 1 to 8, the utility model discloses a kind of structure for sensing voice coil motor movement locus, the voice coil loudspeaker voice coil
Motor 100 includes shrapnel 3, a coil 4, at least a drive magnet 5, once a stent 6, shrapnel in a yoke plate 1, a upper cover 2, one
7 and a base 8, for yoke plate 1 with base 8 in being combined together up and down, the upper cover 2, upper shrapnel 3, coil 4, at least one drive magnetic
Iron 5, stent 6 and lower shrapnel 7 are arranged on yoke plate 1 with base 8, camera lens is equiped with the bottom surface of stent 6（Do not illustrate in figure）, mirror
Head can be moved with stent 6, and upper shrapnel 3 is arranged between the top surface of stent 6 and upper cover 2, and lower shrapnel 6 is arranged on the top of base 8
Between face and the bottom surface of stent 6.
The voice coil motor 100 further include one be arranged on 1 inner wall of yoke plate circuit board 9, circuit board 9 include PET wiring boards 91 and
One injection molding plates 92, the circuit of PET wiring boards 91 are that the conductive glues such as silver paste or graphene are printed in PET film, printing
After the completion of PET wiring boards 91 have the advantages that flexible, light-weight, transmission performance is stable, impact resistance, cheap, with biography
The FPC or PCB circuit board of system, which are compared, can be greatly lowered cost, have on the PET wiring boards 91 and supply a Hall IC chip 93
And the solder joint that welds of capacitance 94, one end that PET wiring boards 91 and base 8 coordinate are equipped with external pin 95, external pin 95 and
External control unit outside connects, for firm welded Hall IC chip 93 and capacitance 94, the PET on soft PET wiring boards 91
Wiring board 91 can or other modes solid by glue glue be first fixed on the injection molding plates 92, after bond pad locations are fixed again into
Row welding Hall IC chip 93 and capacitance 94, avoid since the flexible or flexible of PET wiring boards 91 makes to be welded on the PET wiring boards
Each component on 91 comes off.The Hall IC chip 93 is connected in parallel with capacitance 94, and injection molding plates 92 are only used for carrying and fix
PET wiring boards 91, therefore the injection molding plates 92 can be fixed on any one side of PET wiring boards 91, have when the injection molding plates 92 are arranged on
During the one side of solder joint, it is equipped with the position of corresponding solder joint for the accommodating storage tank 921 of the Hall IC chip 93 and capacitance 94
（As shown in Figures 7 and 8）, after Hall IC chip 93 and capacitance 94 are welded on PET wiring boards 91, then monoblock circuit board 9 consolidated
It is scheduled on the inner wall of yoke plate 1, aligns for convenience, a short slot 21, the electricity is equipped with the position of the 2 corresponding circuits plate 9 of upper cover
The injection molding plates 92 of road plate 9 are equipped with the convex block 922 coordinated with short slot 21.
The stent 6 corresponds to and a feedback magnet 61 is also embedded with the position of the Hall IC chip 93, feeds back magnet 61
Moved with stent 6.The increase feedback magnet 61 in 6 side of stent, feedback magnet 61 coordinates with Hall IC chip 93, to stent 6
Actual motion track fed back, so as to adjust the current strength of coil 4, make the movement locus of stent 6 more accurate so that
So that the focusing of the voice coil motor 100 is more accurate.The feedback magnet 61 is when the stent 6 is molded, and is shaped in stent 6
Interior, its technique is by magnet embryo material（For the raw material to magnetize）Manually or automatically mode is fixed on injection mold corresponding positions
In the structure put, then the ejection formation being molded, the product after shaping carry out operation of magnetizing again.Another technique is using
Injection molding is carried out through having magnetic magnet, but the high temperature that injection molding produces, more than 300 °, the time is right more than 10 seconds
Magnetic influence is very big, it is necessary to which secondary after formed product injection magnetize.Feedback magnet 61 is molded directly within stent 6, without
Consider the requirement of assembly precision, it is not required that stent 6 is considered with feeding back the close-fitting degree of magnet 61, when carrying out destructive test,
Feedback magnet 61, which is embedded in stent 61, will not fall off, and avoid whole voice coil motor 100 from scrapping.
The stent 6 is rectangular configuration, and the coil 4 is fixed in the periphery of the stent, and the feedback magnet is arranged on the stent 6
Wherein in one side, the drive magnet 5 is arranged on the periphery of coil 4, and corresponding stent 6 is equipped with the two-phase of feedback magnet 61
Adjacent side, will feed back magnet 61 and drive magnet 5 is separately positioned, and drive magnet 5 plays driving with coil 4 and is arranged in stent 6
The effect that focuses of camera lens vertical movement, feedback magnet 61 played to negative-feedback regu- lation input coil with Hall IC chip 93
The effect of 4 size of current.
The function mode of the utility model voice coil motor is that external control unit outside makes coil 4 weeks to 4 input current of coil
Enclose and produce magnetic field, the magnetic field interaction produced with drive magnet 5, forms a drive division, promotes stent 6 to move up and down, real
Existing focus adjustment, during adjusting, feedback magnet 61 is as stent 6 moves and moves so that feedback magnet 9 is for Hall IC core
The magnetic field intensity that piece 93 senses also is changing, and Hall IC chip 93 is responded out according to the different shift length of stent 6
Different electric signals, and the electric signal that the electric signal output of response, external control unit outside are exported further according to Hall IC chip 93
Negative-feedback regu- lation is carried out to the current strength of input coil 4, the current strength for further adjusting master controller input coil 4 eliminates
The error of drive division, makes the movement locus of stent 6 more accurate, so that the focusing of the voice coil motor is more accurate, will suddenly
Your IC chip 93 is in parallel with capacitance 94, makes the electric signal more continuous-stable of the feedback output of Hall IC chip 93, plays protection electricity
The effect on road.
The product form and style of above-described embodiment and schema and non-limiting the utility model, any technical field
The appropriate change or modification that those of ordinary skill does it, all should be regarded as not departing from the patent category of the utility model.
Claims (6)
1. a kind of structure for sensing voice coil motor movement locus, the voice coil motor include at least a yoke plate, a upper cover, a line
Circle, an at least drive magnet, a stent and a base, yoke plate are in be combined together up and down with base, the upper cover, coil, drive
Moving magnet and stent are arranged in yoke plate and base, it is characterised in that：The voice coil motor further includes one and is fixedly arranged on yoke plate inner wall
Circuit board, circuit board include the injection molding plates of PET wiring boards and a fixation PET wiring boards, which is equipped with Hall IC core
Piece and the capacitance in parallel with Hall IC chip, the side that the stent corresponds to the Hall IC chip are equipped with one and Hall IC chip
The feedback magnet of cooperation, for the coil around being located at outside stent, the drive magnet is arranged on the periphery of coil, and not with feeding back magnetic
Iron is interfered.
A kind of 2. structure for sensing voice coil motor movement locus as claimed in claim 1, it is characterised in that：PET wiring boards have
There is a solder joint welded for Hall IC chip and capacitance, one end of PET wiring boards and base engagement is printed with external pin, external to draw
Foot is connected with external control unit outside, which is fixed on the injection molding plates, bond pad locations welding Hall IC chip and electricity
Hold.
A kind of 3. structure for sensing voice coil motor movement locus as claimed in claim 1 or 2, it is characterised in that：The injection
Plate is fixed on the one end for setting Hall IC chip and capacitance, which corresponds to sets respectively at the position of Hall IC chip and capacitance
There is a storage tank.
A kind of 4. structure for sensing voice coil motor movement locus as claimed in claim 1, it is characterised in that：The upper cover corresponds to
A short slot is equipped with the position of circuit board, the injection molding plates of the circuit board are equipped with the convex block coordinated with short slot.
A kind of 5. structure for sensing voice coil motor movement locus as claimed in claim 1, it is characterised in that：The voice coil motor
Shrapnel and lower shrapnel are further included, upper shrapnel is arranged between the top surface of stent and upper cover, and lower shrapnel is arranged on the top surface of base
Between the bottom surface of stent.
A kind of 6. structure for sensing voice coil motor movement locus as claimed in claim 1, it is characterised in that：The yoke plate and branch
Frame is rectangular configuration, which corresponds in one side wall of the yoke plate equipped with circuit board and be coated with the feedback magnet, the driving
Magnet includes two, and the periphery for being arranged on coil is corresponded to outside the two side walls of the adjacent feedback magnet of stent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721274649.8U CN207283347U (en) | 2017-09-30 | 2017-09-30 | A kind of structure for sensing voice coil motor movement locus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721274649.8U CN207283347U (en) | 2017-09-30 | 2017-09-30 | A kind of structure for sensing voice coil motor movement locus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207283347U true CN207283347U (en) | 2018-04-27 |
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ID=61987482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721274649.8U Active CN207283347U (en) | 2017-09-30 | 2017-09-30 | A kind of structure for sensing voice coil motor movement locus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207283347U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707083A (en) * | 2017-09-30 | 2018-02-16 | 厦门新鸿洲精密科技有限公司 | A kind of structure for sensing voice coil motor movement locus |
| US10763734B2 (en) | 2018-08-07 | 2020-09-01 | Triple Win Technology (Shenzhen) Co. Ltd. | Voice coil motor |
-
2017
- 2017-09-30 CN CN201721274649.8U patent/CN207283347U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707083A (en) * | 2017-09-30 | 2018-02-16 | 厦门新鸿洲精密科技有限公司 | A kind of structure for sensing voice coil motor movement locus |
| US10763734B2 (en) | 2018-08-07 | 2020-09-01 | Triple Win Technology (Shenzhen) Co. Ltd. | Voice coil motor |
| TWI712249B (en) * | 2018-08-07 | 2020-12-01 | 鴻海精密工業股份有限公司 | Voice coil motor and its fabrication method |
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