CN201032703Y - Flat spring plate of speech coil motor - Google Patents
Flat spring plate of speech coil motor Download PDFInfo
- Publication number
- CN201032703Y CN201032703Y CNU2007200045506U CN200720004550U CN201032703Y CN 201032703 Y CN201032703 Y CN 201032703Y CN U2007200045506 U CNU2007200045506 U CN U2007200045506U CN 200720004550 U CN200720004550 U CN 200720004550U CN 201032703 Y CN201032703 Y CN 201032703Y
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- Prior art keywords
- coil motor
- voice coil
- elastic piece
- support sector
- flat elastic
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- 239000003381 stabilizer Substances 0.000 claims description 24
- 239000012634 fragment Substances 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 7
- 238000013016 damping Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses a flat clip for voice coil motor, which comprises a fixation part, a distortion part, a support part, a stress part and a stable part. Wherein, the stress part, in the inner rim of the fixation part, is connected with the fixation part through the distortion part and the support part. The stress part is able to maintain an identical plane with the fixation part. The stable part is formed through the overhung support part and is equipped between the support part and the fixation part. The utility model overcomes the shortcomings of the prior technology, and is able to reduce the response time effectively.
Description
Technical field
The utility model is about a kind of flat elastic piece, particularly about a kind of flat elastic piece that is used in voice coil motor, and is not increasing damping and is not increasing under the coefficient of elasticity condition of shell fragment, has short characteristic of response time.
Background technology
Along with the high speed development of mobile communication and the universalness of electronic equipment, people wish that more and more the electronic product that is equipped with oneself can effectively reduce volume, but be subject to the development of electromechanical integration system, and micro electronmechanical (Microelectromechanical Systems, MEMS) application universalness not as yet, so (Voice Coil Motor VCM) is actuating system on the electronic product to industry widespread usage voice coil motor.
The advantage of voice coil motor is that volume is little, little power consumption, actuating displacement accurately reach relative low price; be fit to very much as accurate short distance actuator in the electronic product; as the vibrating motor in the mobile phone, the upper and lower displacement actuator of magnetic head/optical read/write head in the storage facilities; automatic focus actuator in the camera lens etc.; yet the actuating of voice coil motor is compared with the speed that recovery pace of change and electronic product were counted bold and unconstrained second easily; more relatively slow, therefore on voice coil motor, can add at least one shell fragment usually and quicken to activate or the pace of change of restoring.
See also shown in Figure 1, it is the decomposing schematic representation that is used in traditional voice coil motor of camera automatic zooming (AF), this voice coil motor includes a loam cake 11, one lower bottom cover 12 and an outside framework 13, four limits are respectively equipped with magnet 14 around a lens mount 15 in the outside framework 13, this lens mount 15 is in order to a ccontaining lens group 16, going up simultaneously coil 17 is installed in respectively on this lens mount 15 with lower coil 18, wherein, these lens mount 15 movable magnet 14 ambients in this outside framework 13, when coil on this 17 and lower coil 18 conducting weak currents, can produce with the magnetic field of this magnet 14 and inhale mutually or the effect that repels each other, and and then activate or reset this lens mount 15, and lens mount 15 is by one or one group flat elastic piece 19 quickens to activate or reset speed.
Shown in Figure 2ly be general flat elastic piece, yet in mobile phone camera assess performance index, the response time of voice coil motor (Response-Time) is a very important characteristic, its measurement mode is the pulse current that adds a 80mA, voice coil motor movable part (as lens mount 15) is by starting to the stable time of transient response, transient response stable condition wherein is that stroke is less than 10um, the stroke schematic diagram that is current impulse and voice coil motor shown in Figure 3.
In fact the key of voice coil motor decision response time is the Lorentz force (LorentzForce) of movable part and the All Time of the elastic force balance of flat elastic piece, please refer to Fig. 1 shows, existing technology is as follows, as coil (Coil, as above coil 17 and lower coil 18) (the Magnetic Field in magnetic field, magnet 14 produces) in be subjected to the effect of Lorentz force, drive movable part and produce one to+kinetic energy that the Z direction moves, therefore, shell fragment is subjected to this power influence, produce displacement and distortion, when elastic force balance that the Lorentz force and the shell fragment distortion of+Z direction produced, promptly reach the stable equilibrium, just respond stable stroke and required time.
The method of generally improving the response time has two kinds: one, increase damping (Damping); Two, increase the elastic coefficient, but voice coil motor is an accurate driven motor, especially in order to meet the compact structure of mobile phone camera, so voice coil motor also is developing goal with the small size, the practice that increases damping then need select the stronger spring material of rigidity for use as for increasing the elastic coefficient, but this measure meeting increases the starting current demand of voice coil motor for saying the more and more littler voice coil motor of cube and inapplicable, and then cause power consumption to increase, reduce the battery supplied time.
Thus, the artificial defective that solves the flat elastic piece that uses in the existing voice coil motor of this case design, and the improving of the above-mentioned defective of thoughts are that the spy concentrates on studies, and propose a kind of reasonable in design and can effectively improve the utility model of above-mentioned disappearance finally.
The utility model content
The technical problems to be solved in the utility model is: a kind of flat elastic piece with voice coil motor of high stability is provided, and it can shorten the response time of voice coil motor not increasing shell fragment group Buddhist nun and coefficient of elasticity to keep under the low power consumption design.
Technical solution of the present utility model is: a kind of flat elastic piece of voice coil motor, and it includes:
One fixed part is in order to keep a shell fragment shape;
One variant part, this fixed part extension forms certainly, can twist to produce an elastic-restoring force;
One support sector connects this variant part;
One forced section is connected with this support sector;
One stabilizers is extended by this support sector, and is arranged between this support sector and this fixed part.
The flat elastic piece of aforesaid voice coil motor, wherein, this shell fragment also includes a salient point, is arranged on the tail end of this stabilizers.
The flat elastic piece of aforesaid voice coil motor, wherein, this shell fragment is shaped as a plectane face, is fixed in the outside framework in this voice coil motor.
The flat elastic piece of aforesaid voice coil motor, wherein, this forced section and a movable part join.
The flat elastic piece of aforesaid voice coil motor wherein, when this movable part is subjected to an external force, will twist this variant part, when this external force disappears, reset by this elastic-restoring force that this variant part produced.
The flat elastic piece of aforesaid voice coil motor, wherein, when this forced section is subjected to an external force, will move this variant part, this support sector and this stabilizers, when this external force disappears, reset by an integration elastic-restoring force of the common generation of this variant part, this support sector and this stabilizers institute.
The flat elastic piece of aforesaid voice coil motor, wherein, when this forced section is subjected to an external force, to move this variant part, this support sector and this stabilizers and move up and down, when this external force disappears, reset by an integration elastic-restoring force of the common generation of this variant part, this support sector and this stabilizers institute and an inertia force.
The utility model also proposes a kind of flat elastic piece of voice coil motor, includes:
One fixed part is in order to keep a shell fragment shape;
One variant part extends internally and forms from an inner ring surface of this fixed part;
One support sector connects the two ends of this variant part with respect to this fixed part;
One forced section is connected in the far-end of this support sector;
One stabilizers is extended by the outer shroud of this support sector and this forced section junction, and is arranged between this support sector and this fixed part.
The flat elastic piece of aforesaid voice coil motor, wherein, this fixed part is fixed in the outside framework in this voice coil motor.
The flat elastic piece of aforesaid voice coil motor, wherein, this forced section and a lens mount join.
The flat elastic piece of aforesaid voice coil motor wherein, also includes a salient point, is arranged on the tail end of this stabilizers, presents semicircular structure.
Characteristics of the present utility model and advantage are: the flat elastic piece of voice coil motor of the present utility model includes a fixed part, in order to keep a shell fragment shape; One variant part extends internally from an inner ring surface of this fixed part; One support sector connects the two ends of this variant part with respect to this fixed part; One forced section is connected in the far-end of this support sector; One stabilizers is extended by the outer shroud of this support sector and this forced section junction, and is arranged between this support sector and this fixed part.
In addition, fixed part of the present utility model system is fixed in the outside framework in this voice coil motor, and this forced section and a lens mount join.
Moreover, when forced section of the present utility model is subjected to an external force, to move this variant part, this support sector and this stabilizers and move up and down, when this external force disappears, make this lens mount reset by an integration elastic-restoring force of the common generation of this variant part, this support sector and this stabilizers institute and an inertia force.
Description of drawings
Fig. 1 is the decomposing schematic representation of known voice coil motor;
Fig. 2 is the flat elastic piece in the known voice coil motor;
Fig. 3 for voice coil motor accept that pulse current produces response stroke and response time schematic diagram;
Fig. 4 is the vertical view of the utility model flat elastic piece; And
Fig. 5 for the voice coil motor of using the utility model flat elastic piece accept that pulse current produces response stroke and response time schematic diagram.
The main element symbol description:
12 times retaining caps of 11 loam cakes
13 outside frameworks, 14 magnet
15 lens mounts, 16 lens group
19 flat elastic pieces, 21 fixed parts
22 variant parts, 23 forced sections
24 support sectors, 25 stabilizers
26 salient points, 27 accepting grooves
Embodiment
For describing technology contents of the present utility model, structural feature and purpose of being reached and effect in detail, below exemplify now that embodiment and conjunction with figs. are detailed gives explanation.
Please refer to shown in Figure 4, the flat elastic piece of high stability of the present utility model includes a fixed part 21, one variant part 22, one forced section 23, one support sector 24 and a stabilizers 25, wherein the movable piece in this fixed part 21 and the voice coil motor joins, when being applied in the autofocus system of camera lens as this voice coil motor, this movable piece is a lens mount, can set firmly a lens group, and when this voice coil motor is applied to storage device, then this movable piece can be magnetic head or optical read head, this fixed part 21 presents square in the present embodiment, and each four limit is circular-arc (promptly this shell fragment shape can be the plectane face), the outer breach that is equipped with of this fixed part, in order to this movable part scarf.
In the interior hoop of this fixed part 21, extend this variant part 22, the length of this variant part 22 and thickness can need and be adjusted according to actual design, extend a rib at an end of this variant part 22 and be this support sector 24, its length and thickness can be according to the design requirement adjustment, far-end bending connection one forced section 23 in this support sector 24.
The interior ring of this forced section 23 is in order to be connected with movable part (as lens mount 15), its inner ring surface is provided with plurality of grooves and breach, tie this movable part in order to embedding, in addition, oppositely extend this stabilizers 25 in the close positions that this forced section 23 is connected with support sector 24, this stabilizers 25 is arranged between the support sector 24 of this fixed part 21 and this rib-like, and the far-end of this stabilizers 25 is provided with a salient point 26, can adjust the response characteristic of this flat elastic piece, in addition, when this salient point 26 during greater than the corresponding space of this this fixed part 21 and this support sector 24, can in this fixed part 21, encircle and accepting groove 27 is set in order to accommodate this salient point 26, though the stabilizers quantity of present embodiment is four groups, this stabilizers 25 in fact, salient point 26, support sector 24 can change according to design requirement with the quantity of variant part 22.
With respect to two kinds of defectives that method had of improving the response time in the known technology, high-stability panel shrapnel of the present utility model is provided with stabilizers 25, and as in the present embodiment, the semicircular structure that cooperates its tail end salient point 26, a vibrate in opposite phase can be provided when the voice coil motor mass motion, because the relation of inertia, when flat elastic piece moves because of movable part, direct of travel with respect to this flat elastic piece produces a reverse power, when transient response, can do destructive interference with respect to the voice coil motor stroke, promptly show as Fig. 5, can effectively reduce the response time, particularly when not increasing damping and coefficient of elasticity, reduce the response time with the setting of salient point 26 by stabilizers 25.
Though the utility model discloses with specific embodiment; but it is not in order to limit the utility model; any those skilled in the art; the displacement of the equivalent assemblies of under the prerequisite that does not break away from design of the present utility model and scope, having done; or, all should still belong to the category that this patent is contained according to equivalent variations and modification that the utility model scope of patent protection is done.
Claims (8)
1. the flat elastic piece of a voice coil motor is characterized in that, includes:
One fixed part is in order to keep a shell fragment shape;
One variant part, this fixed part extension forms certainly, can twist to produce an elastic-restoring force;
One support sector connects this variant part;
One forced section is connected with this support sector;
One stabilizers is extended by this support sector, and is arranged between this support sector and this fixed part.
2. the flat elastic piece of voice coil motor as claimed in claim 1 is characterized in that, this shell fragment also includes a salient point, is arranged on the tail end of this stabilizers.
3. the flat elastic piece of voice coil motor as claimed in claim 1 is characterized in that, this shell fragment is shaped as a plectane face, is fixed in the outside framework in this voice coil motor.
4. the flat elastic piece of voice coil motor as claimed in claim 1 is characterized in that, this forced section and a movable part join.
5. the flat elastic piece of a voice coil motor is characterized in that, includes:
One fixed part is in order to keep a shell fragment shape;
One variant part extends internally and forms from an inner ring surface of this fixed part;
One support sector connects the two ends of this variant part with respect to this fixed part;
One forced section is connected in the far-end of this support sector;
One stabilizers is extended by the outer shroud of this support sector and this forced section junction, and is arranged between this support sector and this fixed part.
6. the flat elastic piece of voice coil motor as claimed in claim 5 is characterized in that, this fixed part is fixed in the outside framework in this voice coil motor.
7. the flat elastic piece of voice coil motor as claimed in claim 5 is characterized in that, this forced section and a lens mount join.
8. the flat elastic piece of voice coil motor as claimed in claim 5 is characterized in that, also includes a salient point, is arranged on the tail end of this stabilizers, presents semicircular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200045506U CN201032703Y (en) | 2007-03-15 | 2007-03-15 | Flat spring plate of speech coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200045506U CN201032703Y (en) | 2007-03-15 | 2007-03-15 | Flat spring plate of speech coil motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201032703Y true CN201032703Y (en) | 2008-03-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200045506U Expired - Fee Related CN201032703Y (en) | 2007-03-15 | 2007-03-15 | Flat spring plate of speech coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201032703Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621238B (en) * | 2008-07-02 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor |
| CN101630889B (en) * | 2008-07-15 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Flat elastic sheet and voice coil motor |
| CN101640467B (en) * | 2008-07-28 | 2012-05-30 | 鸿富锦精密工业（深圳）有限公司 | Shrapnel and voice coil motor |
| CN101533142B (en) * | 2008-03-12 | 2012-12-05 | 德昌电机(深圳)有限公司 | Lens module group |
| TWI404300B (en) * | 2008-10-17 | 2013-08-01 | Hon Hai Prec Ind Co Ltd | Molding apparatus for flat spring plate and method for manufacturing flat spring plates using the same |
| TWI408876B (en) * | 2008-06-13 | 2013-09-11 | Hon Hai Prec Ind Co Ltd | Voice coil motor actuator |
| TWI412215B (en) * | 2008-06-13 | 2013-10-11 | Hon Hai Prec Ind Co Ltd | Voice-coil motor and lens module using same |
-
2007
- 2007-03-15 CN CNU2007200045506U patent/CN201032703Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533142B (en) * | 2008-03-12 | 2012-12-05 | 德昌电机(深圳)有限公司 | Lens module group |
| TWI408876B (en) * | 2008-06-13 | 2013-09-11 | Hon Hai Prec Ind Co Ltd | Voice coil motor actuator |
| TWI412215B (en) * | 2008-06-13 | 2013-10-11 | Hon Hai Prec Ind Co Ltd | Voice-coil motor and lens module using same |
| CN101621238B (en) * | 2008-07-02 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor |
| CN101630889B (en) * | 2008-07-15 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Flat elastic sheet and voice coil motor |
| CN101640467B (en) * | 2008-07-28 | 2012-05-30 | 鸿富锦精密工业（深圳）有限公司 | Shrapnel and voice coil motor |
| TWI404300B (en) * | 2008-10-17 | 2013-08-01 | Hon Hai Prec Ind Co Ltd | Molding apparatus for flat spring plate and method for manufacturing flat spring plates using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080305 |