CN204948356U - For the double effect device that the structure and acoustic-electric that detect loudspeaker vibration displacement turn mutually - Google Patents
For the double effect device that the structure and acoustic-electric that detect loudspeaker vibration displacement turn mutually Download PDFInfo
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- CN204948356U CN204948356U CN201520763528.4U CN201520763528U CN204948356U CN 204948356 U CN204948356 U CN 204948356U CN 201520763528 U CN201520763528 U CN 201520763528U CN 204948356 U CN204948356 U CN 204948356U
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Abstract
The utility model discloses a kind of structure for detecting loudspeaker vibration displacement, involving vibrations system and the magnetic circuit system be positioned at below vibrational system, vibrational system comprises vibrating diaphragm and is positioned at the voice coil loudspeaker voice coil below vibrating diaphragm, and magnetic circuit system comprises washer and magnet; Detection capacitance for detecting loudspeaker vibration displacement comprises the movable plate and fixed polar plate that are oppositely arranged, and movable plate is attached on vibrating diaphragm, and the upper surface of washer is provided with electret film, and electret film is fixed polar plate.The invention also discloses the double effect device that a kind of acoustic-electric turns mutually, also comprise the impedance transformer be connected with electric capacity, impedance transformer comprises field effect transistor and diode.The movable plate of electric capacity is arranged in vibrational system by the utility model, and fixed polar plate is arranged under vibrational system and position and fixes, and when vibrational system is vibrated, the change of Detection capacitance can calculate the actual displacement of vibrational system.
Description
Technical field
The utility model relates to the double effect device that a kind of structure for detecting loudspeaker vibration displacement and a kind of acoustic-electric turn mutually.
Background technology
In prior art, no matter be for Microspeaker or large-scale loudspeaker, when working under low frequency condition, the problem of limits product maximum power application is mainly:
Under high-power, the voice coil loudspeaker voice coil worked under low frequency condition produces excessive displacement, and excessive displacement can cause distortion sharply to raise, and even occurs that problem is touched in the wiping of obvious voice coil loudspeaker voice coil and magnetic circuit system, and these all can cause the mechanical damage of product systems.
For this problem, current solution is the power adopting intelligent power output amplification control unit control loudspeaker product, go out the actual displacement of speaker vibration system according to the information (as voltage) of input and the physical parameter " reckoning " of the information (as electric current) monitored and loud speaker, reduce the power of speaker product when actual displacement exceeds predetermined extent.
But intelligent power output amplification control unit remains to build in for the reckoning of actual displacement and to carry out on the theoretical model of hypothesis, and this theoretical model still has certain difference with actual product.In addition, for batch production Microspeaker, the physical parameter of loud speaker always also exists some deviations, can not accomplish 100% consistent.Above-mentioned reason is difficult to accomplish the real displacement of accurate each speaker product of real time reaction with regard to determining the reckoning of intelligent power output amplification control unit to actual displacement.
Utility model content
The purpose of this utility model is to provide a kind of new solution detecting speaker unit vibration displacement.
According to first aspect of the present utility model, providing a kind of structure for detecting loudspeaker vibration displacement, comprising described loud speaker and the Detection capacitance for detecting described loudspeaker vibration displacement; Described loud speaker involving vibrations system and the magnetic circuit system be positioned at below described vibrational system, described vibrational system comprises vibrating diaphragm and is positioned at the voice coil loudspeaker voice coil below vibrating diaphragm, and described magnetic circuit system comprises washer and magnet; The described Detection capacitance for detecting described loudspeaker vibration displacement comprises the movable plate and fixed polar plate that are oppositely arranged, and described movable plate is attached on described vibrating diaphragm, and the upper surface of described washer is provided with electret film, and described electret film is fixed polar plate.
Preferably, the material of described electret film is following arbitrary: polytetrafluoroethylene material, poly-difluoroethylene, Kynoar, polyethylene, polypropylene, Polyetherimide, polyethylene terephthaldehyde ester.
Preferably, described vibrating diaphragm is silica gel or silicon rubber material.
Preferably, described movable plate is metal level or the centre flexible circuitry flaggy with metal level.
Preferably, described metal level or centre are attached to top or the below of vibrating diaphragm with the flexible circuitry flaggy of metal level.
Preferably, described vibrating diaphragm comprises and is positioned at middle planar portions, is positioned at the ring portion at planar portions edge and is positioned at the fixed part of outermost; Described metal level or centre are only covered in described planar portions with the flexible circuitry flaggy of metal level.
Preferably, described vibrating diaphragm comprises and is positioned at middle planar portions, is positioned at the ring portion at planar portions edge and is positioned at the fixed part of outermost; Described centre comprises central part with the flexible circuitry flaggy of metal level, surround the annulus of described central part and connects the connecting portion of described central part and described annulus, described annulus covers the fixed part of described vibrating diaphragm, and described central part covers the planar portions of described vibrating diaphragm and extends to the below in described ring portion.
Preferably, described vibrating diaphragm comprises and is positioned at middle planar portions, is positioned at the ring portion at planar portions edge and is positioned at the fixed part of outermost; The top of described fixed part is provided with electric connection structure.
Preferably, described electric connection structure is becket.
According to second aspect of the present utility model, provide the double effect device that a kind of acoustic-electric turns mutually, comprise foregoing structure, and the impedance transformer be connected with described Detection capacitance, described impedance transformer comprises field effect transistor and diode.
Inventor of the present utility model finds, the technical scheme of the actual displacement of vibrational system is not also detected in the prior art by the change of Detection capacitance, therefore, this direction of dealing with problems is that those skilled in the art never expect or does not anticipate, therefore the utility model is a kind of new technical scheme.
The utility model devises the capacitance structure for detecting vibrational system actual displacement, the movable plate of electric capacity is arranged in vibrational system, fixed polar plate is arranged under vibrational system and position and fixes, when vibrational system is vibrated, the change of Detection capacitance can calculate the actual displacement of vibrational system, so just can reduce the power of speaker unit when the actual displacement of vibrational system exceeds secure threshold.For the electronic equipment adopting this loadspeaker structure, can realize detecting in real time the displacement of each speaker product at electronic apparatus system end.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present utility model, further feature of the present utility model and advantage thereof will become clear.
Accompanying drawing explanation
In the description combined and the accompanying drawing forming a part for specification shows embodiment of the present utility model, and illustrate that one is used from and explains principle of the present utility model together with it.
Fig. 1 is that the utility model is for detecting the schematic diagram of the first embodiment of the structure of loudspeaker vibration displacement.
Fig. 2 is that the utility model is for detecting the schematic diagram of the second embodiment of the structure of loudspeaker vibration displacement.
Fig. 3 is the structural representation of centre with the flexible circuitry flaggy of metal level of the second embodiment.
Description of reference numerals
Magnetic gap in 11 planar portions, 12 ring portions, 13 fixed parts, 2 voice coil loudspeaker voice coils, 3 washers, 4 magnet, 5 frame, 6 electric connection structures, 8 field effect transistor, 9;
With flexible circuitry flaggy, 300 electret films of metal level in the middle of 100 metal levels, 200.
Embodiment
Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit scope of the present utility model.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the utility model and application or use.
The technology and equipment known for person of ordinary skill in the relevant may not discuss in detail, but in the appropriate case, described technology and equipment should be regarded as a part for specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
The utility model devises the capacitance structure for detecting the displacement of speaker vibration system actual vibration, Detection capacitance forms by movable plate with the fixed polar plate that movable plate is oppositely arranged, wherein, movable plate is that a part for vibrational system is vibrated with vibrational system, and fixed polar plate is arranged under vibrational system and relative to the enclosure location of loud speaker and fixes.When vibrational system is vibrated, movable plate vibrates thereupon, the distance of two pole plates changes and causes electric capacity to change, and the curent change of the circuit that the numerical value change of direct this electric capacity of monitoring or indirect control and supervision are connected with this electric capacity can calculate the actual displacement of vibrational system.
The utility model is introduced for detecting the first embodiment of the structure of loudspeaker vibration displacement with reference to figure 1, the vibrational system of loud speaker comprises vibrating diaphragm and is positioned at the voice coil loudspeaker voice coil 2 below vibrating diaphragm, vibrating diaphragm comprises and is positioned at middle planar portions 11, is positioned at the ring portion 12 at planar portions 11 edge and is positioned at the fixed part 13 of outermost, and fixed part 13 is for being fixed on vibrating diaphragm in speaker unit.The magnetic circuit system of loud speaker is positioned at the below of vibrational system, comprises washer 3, magnet 4 and frame 5 successively from top to bottom.
The upper surface of washer 3 is provided with electret film 300, and electret film 300 is fixed polar plate.Keep all pressing to allow between vibrating diaphragm and washer 3, magnetic gap 9 in existing between vibrating diaphragm and washer 3.
This electret film 300 can be formed through hyperpolarization by electret, and this electret film 300 can cover the Zone Full of the upper surface of washer 3.The material of electret film 300 is following arbitrary: polytetrafluoroethylene material, poly-difluoroethylene, Kynoar, polyethylene, polypropylene, Polyetherimide, polyethylene terephthaldehyde ester.The material of electret film 300 is preferably polytetrafluoroethylene material, by polarization after with electric charge.
Vibrating diaphragm can be utilized to form movable plate, in first embodiment, movable plate is metal level 100, as can be seen from Figure 1, metal level 100 is only attached to the top of the planar portions 11 of vibrating diaphragm, and this is to reduce metal level 100 to the impact of the compliance in the ring portion 12 of vibrating diaphragm as far as possible.In other embodiments, metal level 100 can also be attached to the top of the fixed part 13 of vibrating diaphragm simultaneously.In other embodiments, metal level 100 can also be attached to the below of vibrating diaphragm.
The material of vibrating diaphragm is preferably silica gel or silicon rubber material, and this bi-material can both tolerate the high temperature of 140 DEG C, in order to avoid cause properties of product to decline when temperature is higher.In order to improve the elastic characteristic of vibrating diaphragm, vibrating diaphragm can also comprise conventional plastic film layers (single thin film or multi-layer compound film).
When vibrating under the effect of voice coil loudspeaker voice coil 2 at magnetic circuit system be energized, voice coil loudspeaker voice coil 2 drives diaphragm oscillations, vibration of membrane of shaking can cause the capacitance of the Detection capacitance of movable plate and fixed polar plate composition to change, because electret film 300 is with stable electric charge, just can be calculated the actual displacement of vibrational system by the change numerical value monitoring this Detection capacitance, also can calculate the actual displacement of vibrational system by the curent change of circuit that is connected with this electric capacity of indirect control and supervision.
In application of the present utility model, whether the actual displacement can monitoring vibrational system exceeds default secure threshold, if exceed the input power just reducing loud speaker.Whether the change numerical value also can monitoring this electric capacity exceeds default secure threshold, if exceed the input power just reducing loud speaker.Whether the curent change also can monitoring the circuit be connected with this electric capacity exceeds default secure threshold, if exceed the input power just reducing loud speaker.
The utility model can utilize intelligent power output amplification control unit to be connected with this electric capacity, and to monitor the actual displacement of vibrational system and to reduce the input power of loud speaker when needed, protection loud speaker can not too distortion or be subject to physical damnification.
The utility model is introduced for detecting the second embodiment of the structure of loudspeaker vibration displacement with reference to figure 2, be that the set-up mode of movable plate is different with the difference of the first embodiment, in second embodiment, movable plate is the middle flexible circuitry flaggy 200 with metal level, and the middle flexible circuitry flaggy 200 with metal level is attached to the below of vibrating diaphragm.
As can be seen from Figure 3, the middle flexible circuitry flaggy 200 with metal level comprises central part 201, surrounds the annulus 202 of central part 201 and connects the connecting portion 203 of central part 201 and annulus 202, annulus 202 covers the fixed part 11 of vibrating diaphragm, and central part 201 covers the planar portions 11 of vibrating diaphragm and extends to the below in ring portion 12.It should be noted that, the shape of the metal level 100 of the first embodiment and set-up mode can with the centre of the second embodiment with the shape of the flexible circuitry flaggy 200 of metal level and set-up mode want with.
Shown in figure 1 and Fig. 2, the top of the fixed part 13 of vibrating diaphragm is provided with electric connection structure 6, electric connection structure 6 can be becket or other electric connection structure, and the movable plate of Detection capacitance by this electric connection structure 6 ground connection or can be connected to external circuit.Because magnet 4 and frame 5 are electric conductor, fixed polar plate can connect external circuit by the bottom of frame 5.
Because magnet 4 and frame 5 are electric conductor, fixed polar plate can be connected with impedance transformer by the bottom of frame 5, impedance transformer comprises a field effect transistor 8 and a diode (not shown in FIG.), and impedance transformer is connected with the amplifier of system end again.Further, amplifier can be connected with intelligent power output amplification control unit, intelligent power output amplification control unit for detect the change of the capacitance of this Detection capacitance and the actual displacement calculating vibrational system with the input power of control loudspeaker device.
Because the loud speaker being provided with impedance transformer has possessed all kernel components of capacitance microphone, so can also use as capacitance microphone, so the utility model additionally provides the double effect device that a kind of acoustic-electric turns mutually, comprising: the vibrational system with movable plate; Magnetic circuit system; To be arranged under vibrational system and to be relatively fixed pole plate with movable plate, movable plate and fixed polar plate composition electric capacity; And the impedance transformer to be connected with electric capacity, impedance transformer comprises field effect transistor 8 and diode.This double effect device can use as loud speaker or microphone.
Although be described in detail specific embodiments more of the present utility model by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit scope of the present utility model.It should be appreciated by those skilled in the art, when not departing from scope and spirit of the present utility model, above embodiment can be modified.Scope of the present utility model is limited by claims.
Claims (10)
1. for detecting a structure for loudspeaker vibration displacement, it is characterized in that, comprising described loud speaker and the Detection capacitance for detecting described loudspeaker vibration displacement;
Described loud speaker involving vibrations system and the magnetic circuit system be positioned at below described vibrational system, described vibrational system comprises vibrating diaphragm and is positioned at the voice coil loudspeaker voice coil (2) below vibrating diaphragm, and described magnetic circuit system comprises washer (3) and magnet (4);
The described Detection capacitance for detecting described loudspeaker vibration displacement comprises the movable plate and fixed polar plate that are oppositely arranged, described movable plate is attached on described vibrating diaphragm, the upper surface of described washer (3) is provided with electret film (300), and described electret film (300) is fixed polar plate.
2. structure according to claim 1, it is characterized in that, the material of described electret film (300) is following arbitrary: polytetrafluoroethylene material, poly-difluoroethylene, Kynoar, polyethylene, polypropylene, Polyetherimide, polyethylene terephthaldehyde ester.
3. structure according to claim 1, is characterized in that, described vibrating diaphragm is silica gel or silicon rubber material.
4. structure according to claim 1, is characterized in that, described movable plate is metal level (100) or the centre flexible circuitry flaggy (200) with metal level.
5. structure according to claim 4, is characterized in that, described metal level (100) or centre are attached to top or the below of vibrating diaphragm with the flexible circuitry flaggy (200) of metal level.
6. structure according to claim 4, it is characterized in that, described vibrating diaphragm comprises and is positioned at middle planar portions (11), is positioned at the ring portion (12) at planar portions (11) edge and is positioned at the fixed part (13) of outermost; Described metal level (100) or centre are only covered in described planar portions (11) with the flexible circuitry flaggy (200) of metal level.
7. structure according to claim 4, it is characterized in that, described vibrating diaphragm comprises and is positioned at middle planar portions (11), is positioned at the ring portion (12) at planar portions (11) edge and is positioned at the fixed part (13) of outermost; Described centre comprises central part (201) with the flexible circuitry flaggy (200) of metal level, surround the annulus (202) of described central part (201) and connects the connecting portion (203) of described central part (201) and described annulus (202), described annulus (202) covers the fixed part (11) of described vibrating diaphragm, and described central part (201) covers the planar portions (11) of described vibrating diaphragm and extends to the below of described ring portion (12).
8. structure according to claim 1, it is characterized in that, described vibrating diaphragm comprises and is positioned at middle planar portions (11), is positioned at the ring portion (12) at planar portions (11) edge and is positioned at the fixed part (13) of outermost; The top of described fixed part (13) is provided with electric connection structure (6).
9. structure according to claim 8, is characterized in that, described electric connection structure (6) is becket.
10. the double effect device that turns mutually of acoustic-electric, is characterized in that, comprise the structure as described in any one of claim 1-9, and the impedance transformer be connected with described Detection capacitance, and described impedance transformer comprises field effect transistor (8) and diode.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520763528.4U CN204948356U (en) | 2015-09-29 | 2015-09-29 | For the double effect device that the structure and acoustic-electric that detect loudspeaker vibration displacement turn mutually |
| US15/551,262 US10264360B2 (en) | 2015-03-31 | 2015-11-26 | Structure for detecting vibration displacement of a speaker and acoustoelectric inter-conversion dual-effect device |
| PCT/CN2015/095680 WO2016155340A1 (en) | 2015-03-31 | 2015-11-26 | Structure for use in detecting vibration displacement of speaker and dual-effect device for audio-electric conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520763528.4U CN204948356U (en) | 2015-09-29 | 2015-09-29 | For the double effect device that the structure and acoustic-electric that detect loudspeaker vibration displacement turn mutually |
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| Publication Number | Publication Date |
|---|---|
| CN204948356U true CN204948356U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520763528.4U Active CN204948356U (en) | 2015-03-31 | 2015-09-29 | For the double effect device that the structure and acoustic-electric that detect loudspeaker vibration displacement turn mutually |
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| CN (1) | CN204948356U (en) |
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| CN105611463A (en) * | 2016-03-21 | 2016-05-25 | 歌尔声学股份有限公司 | Diaphragm and manufacturing method thereof |
| CN105657618A (en) * | 2016-03-21 | 2016-06-08 | 歌尔声学股份有限公司 | Loudspeaker module shell and manufacturing method for same |
| CN105657614A (en) * | 2016-03-21 | 2016-06-08 | 歌尔声学股份有限公司 | Moving-coil loudspeaker monomer |
| CN105681985A (en) * | 2016-03-04 | 2016-06-15 | 歌尔声学股份有限公司 | Loudspeaker diaphragm and method for manufacturing the same, and moving-coil loudspeaker |
| CN106060747A (en) * | 2016-05-30 | 2016-10-26 | 歌尔股份有限公司 | Diaphragm assembly defective detection device, loudspeaker and electronic equipment |
| CN107124683A (en) * | 2017-05-24 | 2017-09-01 | 歌尔股份有限公司 | Loudspeaker monomer and electronic equipment |
| WO2018040396A1 (en) * | 2016-08-31 | 2018-03-08 | 歌尔股份有限公司 | Moving-coil loudspeaker |
| US11368791B2 (en) | 2016-03-04 | 2022-06-21 | Goertek Inc. | Speaker vibration diaphragm and method for manufacturing the same, and moving-coil speaker |
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- 2015-09-29 CN CN201520763528.4U patent/CN204948356U/en active Active
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| CN105681985A (en) * | 2016-03-04 | 2016-06-15 | 歌尔声学股份有限公司 | Loudspeaker diaphragm and method for manufacturing the same, and moving-coil loudspeaker |
| US11368791B2 (en) | 2016-03-04 | 2022-06-21 | Goertek Inc. | Speaker vibration diaphragm and method for manufacturing the same, and moving-coil speaker |
| CN105611463B (en) * | 2016-03-21 | 2019-11-15 | 歌尔股份有限公司 | A kind of manufacturing method of vibrating diaphragm and vibrating diaphragm |
| CN105657618B (en) * | 2016-03-21 | 2019-06-07 | 歌尔股份有限公司 | A kind of loudspeaker module casing and the manufacturing method for loudspeaker module casing |
| CN105657618A (en) * | 2016-03-21 | 2016-06-08 | 歌尔声学股份有限公司 | Loudspeaker module shell and manufacturing method for same |
| US10582323B2 (en) | 2016-03-21 | 2020-03-03 | Goertek Inc. | Speaker module housing and manufacturing method thereof |
| WO2017161667A1 (en) * | 2016-03-21 | 2017-09-28 | 歌尔声学股份有限公司 | Moving-coil loudspeaker system |
| WO2017161668A1 (en) * | 2016-03-21 | 2017-09-28 | 歌尔声学股份有限公司 | Diaphragm and manufacturing method for diaphragm |
| KR102047613B1 (en) * | 2016-03-21 | 2019-11-21 | 고어텍 인크 | Movable coil speaker system |
| KR20180075593A (en) * | 2016-03-21 | 2018-07-04 | 고어텍 인크 | Movable coil speaker system |
| US20190028804A1 (en) * | 2016-03-21 | 2019-01-24 | Goertek Inc. | Speaker system with moving voice coil |
| CN105657614A (en) * | 2016-03-21 | 2016-06-08 | 歌尔声学股份有限公司 | Moving-coil loudspeaker monomer |
| EP3435686A4 (en) * | 2016-03-21 | 2019-08-07 | Goertek Inc | Moving-coil loudspeaker system |
| US10397718B2 (en) | 2016-03-21 | 2019-08-27 | Goertek Inc. | Vibration diaphragm and manufacturing method thereof |
| US10433055B2 (en) | 2016-03-21 | 2019-10-01 | Goertek, Inc. | Speaker system with moving voice coil |
| CN105611463A (en) * | 2016-03-21 | 2016-05-25 | 歌尔声学股份有限公司 | Diaphragm and manufacturing method thereof |
| CN106060747A (en) * | 2016-05-30 | 2016-10-26 | 歌尔股份有限公司 | Diaphragm assembly defective detection device, loudspeaker and electronic equipment |
| WO2018040396A1 (en) * | 2016-08-31 | 2018-03-08 | 歌尔股份有限公司 | Moving-coil loudspeaker |
| US10638220B2 (en) | 2016-08-31 | 2020-04-28 | Goertek, Inc. | Moving-coil loudspeaker |
| CN107124683A (en) * | 2017-05-24 | 2017-09-01 | 歌尔股份有限公司 | Loudspeaker monomer and electronic equipment |
| CN107124683B (en) * | 2017-05-24 | 2020-07-24 | 歌尔股份有限公司 | Speaker monomer and electronic equipment |
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| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee | ||
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Address after: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |