CN103313173A - Packaging structure of electret electroacoustic conversion device - Google Patents
Packaging structure of electret electroacoustic conversion device Download PDFInfo
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- CN103313173A CN103313173A CN2012100605823A CN201210060582A CN103313173A CN 103313173 A CN103313173 A CN 103313173A CN 2012100605823 A CN2012100605823 A CN 2012100605823A CN 201210060582 A CN201210060582 A CN 201210060582A CN 103313173 A CN103313173 A CN 103313173A
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- electret
- vibrating membrane
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Abstract
The invention discloses a packaging structure of an electret electroacoustic conversion device. The packaging structure comprises a first electrode mesh, a double-layer electret vibrating diaphragm, a first isolation structure, a second electrode mesh, a second isolation structure, a first outer frame and a second outer frame. The double-layer electret vibrating diaphragm is positioned opposite to the first electrode mesh, wherein a metal coating layer is sandwiched in the middle of a double-layer structure of the double-layer electret vibrating diaphragm and thus a laminated structure of the electret vibrating diaphragm is formed. The first isolation structure is positioned between the first electrode mesh and the double-layer electret vibrating diaphragm. The second electrode mesh is positioned opposite to the double-layer electret vibrating diaphragm. The second isolation structure is positioned between the double-layer electret vibrating diaphragm and the second electrode mesh. The first electrode mesh, the first isolation structure, the double-layer electret vibrating diaphragm, the second isolation structure and the second electrode mesh are sandwiched between the first outer frame and the second outer frame.
Description
Technical field
The present invention relates to the electret electro-acoustic conversion device, particularly relate to the encapsulating structure of electret electro-acoustic conversion device.
Background technology
Conventional loudspeakers mainly is distinguished into coil-moving speaker, piezo-electric loudspeaker and electrostatic loudspeaker according to its type of drive.The interaction that coil-moving speaker mainly utilizes magnetic field, electric current and power three to intersect at a right angle, the piston type ground of control vibrating membrane moves repeatedly, because volume can't dwindle, makes it can't meet following 3C Product for lightening demand then.
Piezo-electric loudspeaker utilizes piezoelectric effect, when an electric field puts on piezoelectric, can make piezoelectric material deforms, and then promotes the vibrating diaphragm sounding, however the required higher and available frequency range deficiency of resonance frequency of piezoelectric, and therefore applicable field is restricted.
The principle of electrostatic loudspeaker is for seizing a conductive diaphragm on both sides by the arms to form a kind of structure of similar capacitor in the middle of two holed battery lead plates, by supplying with the conductive diaphragm Dc bias, and supply with two synchronous positive and negative cross streams voltages of battery lead plate respectively, and by the electrostatic force that positive and negative charge produces, drive this conductive diaphragm and the sound width of cloth penetrated and go.The employed conductive diaphragm of electrostatic loudspeaker is very frivolous, has that transient state reaction is fast, resolution is high, distortion is low and is not subjected to advantage such as electromagnetic effect.
The electret electro-acoustic conversion device generally can be applicable to electrostatic loudspeaker.Utilize electret vibrating membrane spare after charging, can possess for a long time and higher just reach negative or just be all or be all back bias voltage, and the message enlarger only need be exported less interchange message magnitude of voltage and can reach high-quality sound field effect.Therefore, the electret electro-acoustic conversion device meets not only that the future market is lightening, the demand of high tone quality, has more power saving and cost-effective advantage.
Summary of the invention
In view of this, one of purpose of the present invention is to provide the encapsulating structure of the electret electro-acoustic conversion device of a kind of binder free in fact combination, the demand of, high tone quality lightening to meet.
For reaching above-mentioned purpose, according to embodiments of the invention, provide a kind of encapsulating structure of electret electro-acoustic conversion device, comprising: first electrode network; Double-deck electret vibrating membrane arranges with this first electrode network subtend, wherein should insert and put a coat of metal between the bilayer electret vibrating membrane, forms lamination electret vibrating membrane structure; First isolation structure is arranged between this first electrode network and this bilayer electret vibrating membrane; Second electrode network arranges with this bilayer electret vibrating membrane subtend; Second isolation structure is arranged between this bilayer electret vibrating membrane and this second electrode network; And first and second outside framework, this first isolation structure, this first electrode network, this bilayer electret vibrating membrane, this second isolation structure, this second electrode network are folded in therebetween.
For the present invention can be become apparent, embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below:
Description of drawings
Fig. 1 is the decomposing schematic representation of encapsulating structure of the electret electro-acoustic conversion device of one embodiment of the invention;
Fig. 2 is the schematic diagram of the encapsulating structure of the electret electro-acoustic conversion device after the embodiment of the invention assembling;
Fig. 3 for the embodiment of the invention has a plurality of trips in the structural representation of the neighboring area of outside framework;
Fig. 4 A and Fig. 4 B are respectively the joint schematic diagram of embodiment of the invention outside framework.
The main element symbol description
110 first outside frameworks
115 2 outside frameworks
120 first electrode networks
125 second electrode networks
130 first isolation structures
135 second isolation structures
140 double-deck electret vibrating membranes
142,144 electrets
150 trips
The 160a protuberance
The 160b recess
170 trips
Embodiment
Below describe and be accompanied by the example of description of drawings in detail with each embodiment, as reference frame of the present invention.In accompanying drawing or specification description, similar or identical part is all used identical figure number.And in the accompanying drawings, the shape of embodiment or thickness can enlarge, and to simplify or convenient the sign.Moreover, the part of each element will be to describe explanation respectively in the accompanying drawing, it should be noted that, the element that does not illustrate among the figure or describe, for having the form of knowing usually known to the knowledgeable in the affiliated technical field, in addition, only for disclosing the ad hoc fashion that the present invention uses, it is not in order to limit the present invention to certain embodiments.
Fig. 1 shows the decomposing schematic representation according to the encapsulating structure of the electret electro-acoustic conversion device of one embodiment of the invention.See also Fig. 1, the encapsulating structure of electret electro-acoustic conversion device comprises first electrode network 120.Double-deck electret vibrating membrane 140 and the 120 subtend settings of first electrode network, wherein double-deck electret vibrating membrane has and inserts and puts an aluminium coat (not illustrating) between the two-layer electret vibrating membrane 142,144, or other coats of metal, formation lamination electret vibrating membrane structure.First isolation structure 130 is arranged between first electrode film 120 and the double-deck electret vibrating membrane 140.Second electrode network 125 arranges with double-deck electret vibrating membrane subtend.Second isolation structure 135 is arranged between this bilayer electret vibrating membrane 140 and second electrode network 125.First and second outside framework 110,115 is folded in this first isolation structure 130, this first electrode network 120, this bilayer electret vibrating membrane 140, this second isolation structure 135, this second electrode network 125 therebetween.The encapsulating structure of the electret electro-acoustic conversion device after the assembling as shown in Figure 2.
When operation, the homophase that AC power (for example message enlarger) is exported or backward crossover fluid sound news voltage, the AC bias that imposes between first electrode network 120 and second electrode network 125 provides the electric field that drives this electret vibrating membrane vibration.
According to the embodiment of the invention, described first and second outside framework 110,115 is the injection mo(u)lding plastic cement of hard or rigidity.First and second outside framework 110,115 external form can be the class sash profile, have a plurality of trip 150 in the neighboring area, as shown in Figure 3.In one embodiment, have protuberance 160a around first outside framework 110, and the recess 160b that has correspondence on every side of second outside framework 115, the recess of this protuberance correspondence is chimeric mutually, shown in Fig. 4 A.In another embodiment, described first and second outside framework 110,115 is by trip 170 combinations, shown in Fig. 4 B.
Electret vibrating membrane 140 is made by electret, after charging, possesses higher bias voltage for a long time on the surface.Particularly, electret refers to can possess electrostatic charge (static charges) for a long time after dielectric material (dielectric material) is handled through electrification (electrized).The electret that constitutes electret vibrating membrane 140 can be fluorine-containing macromolecular material, and to have reinforcing yin essence electrical because of fluorine.So, with can the electric charge circle is attached after electret vibrating membrane structure 140 charging.Described electret preferably is fluorine-containing high-molecular organic material or fluorine-containing organic-inorganic polymer.Described fluorine-containing macromolecular material comprises expanded PTFE (ePTFE), the polytetrafluoroethylene of side chain is arranged (perfluoroalkoxy is called for short PFA), PEP (FEP), ethylene-tetrafluoroethylene polymer (ETFE), and ethene-trifluoro-ethylene (ECTFE) copolymer.
First and second isolation structures 130,135 purpose are in order to electret vibrating membrane structure and electrode network are separated and produce the effect that is electrically insulated.First and second isolation structures 130,135 can be selected with injection mo(u)lding or punch forming material, will be separated into a plurality of zones on the electret vibrating membrane structure 140.
Be compared to traditional electret electro-acoustic conversion device, the advantage of the electret electro-acoustic conversion device encapsulating structure of the above embodiment of the present invention is:
1, traditional electret electrostatic loudspeaker (EFL) uses adhesive tape with each main member combination.Through long-time operation and environment deterioration, described adhesive tape takes place aging and influences the tonequality of electret electrostatic loudspeaker.The present invention uses the injection mo(u)lding plastic material at attachment, and replaces the mode that tradition is used adhesive tape, significantly improves electret electrostatic loudspeaker (EFL) product aging phenomenon.
2, the employed wire netting electrode of the embodiment of the invention is because rough surface causes quality distortion, even use the fixing audio that also can't reach as plane electrode of adhesive tape.From the viewpoint of physics, electret is not consistent with shaggy distance between electrodes.When applying high voltage to produce electric field between electret and electrode, can cause to vibrating diaphragm push away-strength of La is unbalanced, and the sound equipment of high sound field effect is just become very big problem.By helping of injection mo(u)lding plastic cement of the present invention design, can support easily and fixed electrode vibrating diaphragm and distance between electrodes, make high-quality output that electret electrostatic loudspeaker (EFL) keeps, reduce noise and keep low distortion.
3, traditional electret electrostatic loudspeaker (EFL) is by artificial assembling, and the not good and quality of efficient can't be kept Chang Ding.By helping of injection mo(u)lding plastic cement design of the present invention, can utilize automated production to make traditional electret electrostatic loudspeaker (EFL), obviously reduce artificial wrong and lifting and make efficient.
Though this case has disclosed the present invention in conjunction with above various embodiment, yet it is not in order to limiting scope of the present invention, is familiar with this operator in the technical field under any, without departing from the spirit and scope of the present invention, can do a little change and retouching.Protection scope of the present invention should with enclose claim was defined is as the criterion.
Claims (7)
1. the encapsulating structure of an electret electro-acoustic conversion device comprises:
First electrode network;
Double-deck electret vibrating membrane arranges with this first electrode network subtend, wherein should insert and put a coat of metal between the bilayer electret vibrating membrane, forms lamination electret vibrating membrane structure;
First isolation structure is arranged between this first electrode film and this bilayer electret vibrating membrane;
Second electrode network arranges with this bilayer electret vibrating membrane subtend;
Second isolation structure is arranged between this bilayer electret vibrating membrane and this second electrode; And
First outside framework and second outside framework are folded in this first electrode network, this first isolation structure, this bilayer electret vibrating membrane, this second isolation structure, this second electrode network therebetween.
2. the encapsulating structure of electret electro-acoustic conversion device as claimed in claim 1, wherein this first isolation structure and second isolation structure are the injection mo(u)lding plastic cement.
3. the encapsulating structure of electret electro-acoustic conversion device as claimed in claim 1, wherein this first outside framework around have protuberance, have corresponding recess around this second outside framework, the recess of this protuberance correspondence is chimeric mutually.
4. the encapsulating structure of electret electro-acoustic conversion device as claimed in claim 1, wherein this first and second outside framework is by the trip combination.
5. the encapsulating structure of electret electro-acoustic conversion device as claimed in claim 1 wherein should comprise fluorine-containing macromolecular material (fluorine containing polymers) by the bilayer electret vibrating membrane.
6. the encapsulating structure of electret electro-acoustic conversion device as claimed in claim 5, wherein this fluorine-containing macromolecular material comprises expanded PTFE (ePTFE), polytetrafluoroethylene (PFA), PEP (FEP), ethylene-tetrafluoroethylene polymer (ETFE), and ethene-trifluoro-ethylene (ECTFE) copolymer of side chain is arranged.
7. the encapsulating structure of electret electro-acoustic conversion device as claimed in claim 1, wherein this first isolation structure, this first electrode network, this bilayer electret vibrating membrane, this second isolation structure are to be combined with mechanical force with second electrode network, and between binder free in fact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100605823A CN103313173A (en) | 2012-03-09 | 2012-03-09 | Packaging structure of electret electroacoustic conversion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100605823A CN103313173A (en) | 2012-03-09 | 2012-03-09 | Packaging structure of electret electroacoustic conversion device |
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| CN103313173A true CN103313173A (en) | 2013-09-18 |
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| CN2012100605823A Pending CN103313173A (en) | 2012-03-09 | 2012-03-09 | Packaging structure of electret electroacoustic conversion device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554661A (en) * | 2016-02-03 | 2016-05-04 | 苏州佳世达电通有限公司 | Electro-acoustic conversion apparatus |
| WO2018121701A1 (en) * | 2016-12-30 | 2018-07-05 | 头领科技（昆山）有限公司 | Electrostatic speaker structure |
| CN110087175A (en) * | 2019-04-17 | 2019-08-02 | 海菲曼（天津）科技有限公司 | A kind of electrostatic loudspeaker stator plate and electrostatic loudspeaker |
| CN113747300A (en) * | 2021-08-30 | 2021-12-03 | 头领科技（昆山）有限公司 | Electrostatic earphone |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200980162Y (en) * | 2006-12-14 | 2007-11-21 | 京兆音响有限公司 | An integration electrode plate component for electrostatic loudspeaker |
| TW201204062A (en) * | 2010-07-15 | 2012-01-16 | Taiwan Electrets Electronics Co Ltd | Electrostatic speaker and manufacturing method thereof and conducting plate of the speaker |
-
2012
- 2012-03-09 CN CN2012100605823A patent/CN103313173A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200980162Y (en) * | 2006-12-14 | 2007-11-21 | 京兆音响有限公司 | An integration electrode plate component for electrostatic loudspeaker |
| TW201204062A (en) * | 2010-07-15 | 2012-01-16 | Taiwan Electrets Electronics Co Ltd | Electrostatic speaker and manufacturing method thereof and conducting plate of the speaker |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554661A (en) * | 2016-02-03 | 2016-05-04 | 苏州佳世达电通有限公司 | Electro-acoustic conversion apparatus |
| CN105554661B (en) * | 2016-02-03 | 2018-10-12 | 苏州佳世达电通有限公司 | Electro-acoustic conversion device |
| WO2018121701A1 (en) * | 2016-12-30 | 2018-07-05 | 头领科技（昆山）有限公司 | Electrostatic speaker structure |
| CN108271108A (en) * | 2016-12-30 | 2018-07-10 | 头领科技（昆山）有限公司 | A kind of electrostatic loudspeaker structure |
| CN108271108B (en) * | 2016-12-30 | 2023-04-07 | 昆山海菲曼科技集团有限公司 | Electrostatic loudspeaker structure |
| CN110087175A (en) * | 2019-04-17 | 2019-08-02 | 海菲曼（天津）科技有限公司 | A kind of electrostatic loudspeaker stator plate and electrostatic loudspeaker |
| CN113747300A (en) * | 2021-08-30 | 2021-12-03 | 头领科技（昆山）有限公司 | Electrostatic earphone |
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Application publication date: 20130918 |