CN103987008A - Sound production device - Google Patents
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- CN103987008A CN103987008A CN201410149689.4A CN201410149689A CN103987008A CN 103987008 A CN103987008 A CN 103987008A CN 201410149689 A CN201410149689 A CN 201410149689A CN 103987008 A CN103987008 A CN 103987008A
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Abstract
The invention relates to a sound production device which comprises a base body and a sound production element. A first electrode and a second electrode are arranged on the base body at intervals. The first electrode and the second electrode are made of electrocondution slurry. The sound production element comprises a carbon nano tube structure which is fixed on the first electrode and the second electrode and is electrically with the first electrode and the second electrode. The electrocondution slurry permeates into the carbon nano tube structure. According to the sound production device, the electric connecting performance between the carbon nano tube structure and the electrodes is effectively improved, and accordingly the sound production device is good in stability.
Description
The application is 200810191738.5 divides an application of on December 30th, 2008 application.
Technical field
The present invention relates to a kind of sound-producing device, relate in particular to a kind of sound-producing device based on carbon nano-tube.
Background technology
Sound-producing device is generally comprised of signal input apparatus and sounding component, arrives this sounding component, and then sound by signal input apparatus input signal.Thermo-acoustic device is a kind of in sound-producing device, it is a kind of sound-producing device based on thermoacoustic effect, H.D.Arnold and I.B.Crandall are at document " The thermophone as a precision source of sound ", Phys. Rev. 10, in p22-38 (1917), introduced a kind of simple thermo-acoustic device, it adopts a platinized platinum to make sounding component.Because audible frequency and its unit are thermal capacitance of sounding component are closely related, unit are thermal capacitance is large, audible frequency narrow range, and intensity of acoustic wave is low; Unit are thermal capacitance is little, audible frequency wide ranges, and intensity of acoustic wave is high.Therefore, wish obtains has wider audible frequency scope and higher intensity of acoustic wave, requires the unit are thermal capacitance of sounding component less better.And there is the metal platinized platinum of less thermal capacitance, and being subject to the restriction of material itself, its thickness minimum can only reach 0.7 micron, and adopts this platinized platinum to make the sound-producing device of sounding component, and audible frequency producing is the highest only can reach 4 KHz for it.
In addition, the people such as Fan Shoushan disclose a kind of sound-producing device of applying carbon nano-tube, refer to document " Flexible; Stretchable; Transparent Carbon Nanotube Thin Film Loudspeakers ", model is kept kind et al., Nano Letters, Vol.8 (12), p4539-4545 (2008).Refer to Fig. 1, this sound-producing device 100 comprises a substrate 108, a carbon nano-tube film 104 and two electrodes 106.This carbon nano-tube film 104 is arranged in this substrate 108, and these two electrodes 106 are electrically connected to this carbon nano-tube film 104 respectively, by electric current, is provided and is made this spy nanotube films 104 thermic sounding.Because this sound-producing device 100 adopts carbon nano-tube film 104 as sounding component, this carbon nano-tube film 104 has great specific area and minimum unit are thermal capacitance and thickness as thin as a wafer, so this sound-producing device 100 can send the intensity of acoustic wave that people's ear can be heard, and there is wider audible frequency scope (100Hz ~ 100kHz).
Yet, because described carbon nano-tube film 104 is directly to contact with described two electrodes 106 by self viscosity, so, this carbon nano-tube film 104 is less with the adhesion of described two electrodes 106, firm not with fixing of described two electrodes 106, therefore the effect that is electrically connected between two electrodes 106 of this carbon nano-tube film 104 and this be may reduce, thereby sounding effect and the stability of whole sound-producing device 100 further affected.
Summary of the invention
In view of this, the necessary sound-producing device that electrical connectivity between a kind of effective lifting sounding component and electrode is provided.
A sound-producing device, it comprises: a matrix, a sounding component, one first electrode and one second electrode gap are arranged at described matrix, and the material of this first electrode and the second electrode is electrocondution slurry.This sounding component comprises a carbon nano tube structure, and this carbon nano tube structure is fixed on described the first electrode with described the second electrode and is electrically connected to it.Described electrocondution slurry infiltrates in carbon nano tube structure.
Compared with prior art, described sound-producing device has the following advantages: the electrocondution slurry or the conduction tack coat that due to described the first electrode and described the second electrode, comprise infiltrate in described carbon nano tube structure, both can guarantee that this carbon nano tube structure was well fixed on this first electrode and this second electrode, also increased the contact area of this sounding component and this first electrode and the second electrode, make this sounding component and this first electrode and the second electrode there is good electrical connectivity, make the stability of this sound-producing device better.
Accompanying drawing explanation
Fig. 1 is the profile of a kind of sound-producing device in prior art.
Fig. 2 is the vertical view of the sound-producing device that provides of first embodiment of the invention.
Fig. 3 is the profile along III-III line is cut open in Fig. 2.
Fig. 4 is the vertical view of the sound-producing device that provides of second embodiment of the invention.
Fig. 5 is the profile along V-V line is cut open in Fig. 4.
Fig. 6 is the vertical view of the sound-producing device that provides of third embodiment of the invention.
Fig. 7 is the profile along VII-VII line is cut open in Fig. 6.
Main element symbol description
| Sound-producing device | 10，20，30 |
| Sounding component | 12，22，32 |
| Framework | 18，28 |
| The first electrode | 14a，24a，34a |
| The second electrode | 14b，24b，34b |
| Matrix | 38 |
| Electric conductor | 142，242 |
| Conduction tack coat | 14，24, |
| The first conductive component | 346 |
| The second conductive component | 348 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Below with reference to accompanying drawing, describe the sound-producing device of the embodiment of the present invention in detail.
Refer to Fig. 2 and Fig. 3, first embodiment of the invention provides a kind of sound-producing device 10, and this sound-producing device 10 comprises a framework 18, one first electrode 14a, one second electrode 14b and a sounding component 12.
Described framework is to support this first electrode and this second electrode, and in the present embodiment, this framework is to be a frame structure, and this first electrode and this second electrode hang and be linked to this frame structure.Described framework 18 is made by insulating material, and this insulating material is glass, pottery, resin, wood materials, quartz or plastics etc.In the present embodiment, the material of this framework 18 is resin.
Described the first electrode 14a and the second electrode 14b parallel interval are arranged at described framework 18.This first electrode 14a and the second electrode 14b can be bolted or the mode such as binding agent bonding, and described framework 18 is fixed on in the two ends of the first electrode 14a and the second electrode 14b.Described sounding component 12 is layed in described the first electrode 14a and described the second electrode 14b, is electrically connected to this first electrode 14a and the second electrode 14b.Described the first electrode 14a and the second electrode 14b also have the effect of supporting described sounding component 12.
Described the first electrode 14a is identical with the structure of described the second electrode 14b, the conduction tack coat 14 that this first electrode 14a and the second electrode 14b comprise electric conductor 142 and be arranged at this electric conductor 142.These electric conductor 142 materials are metal or alloy, as one or more in stainless steel, copper, iron, cobalt, nickel, platinum or palladium, or are the alloy of above-mentioned metal.That the shape of this electric conductor 142 may be selected to be is bar-shaped, a kind of in strip, bulk or other shape.In the present embodiment, the material of this electric conductor 142 is preferably stainless steel, is shaped as rectangular bar-shaped.
The material of described conduction tack coat 14 is electrocondution slurry or conducting resinl, and the Main Ingredients and Appearance of this electrocondution slurry or conducting resinl includes metallic particles, binding agent and solvent etc., and described metallic particles can be gold grain, silver-colored particle or alumina particles etc.The present embodiment is preferably conductive silver slurry, and the metallic particles in this electrocondution slurry is silver-colored particle.
This sounding component 12 comprises a carbon nano tube structure.This carbon nano tube structure comprises at least one carbon nano-tube film, at least one liner structure of carbon nano tube or its combination.The thickness of described carbon nano tube structure (being diameter during linear structure) is 0.5 nanometer ~ 1 millimeter.Preferably, the thickness of this carbon nano tube structure is 0.5 micron.The unit are thermal capacitance of described carbon nano tube structure can be less than 2 * 10
-4every square centimeter of Kelvin of joule.Preferably, the unit are thermal capacitance of described carbon nano tube structure is less than 1.7 * 10
-6every square centimeter of Kelvin of joule.
Carbon nano-tube in described carbon nano tube structure comprises one or more in Single Walled Carbon Nanotube, double-walled carbon nano-tube and multi-walled carbon nano-tubes.The diameter of described Single Walled Carbon Nanotube is 0.5 nanometer ~ 50 nanometer, and the diameter of described double-walled carbon nano-tube is 1.0 nanometer ~ 50 nanometers, and the diameter of described multi-walled carbon nano-tubes is 1.5 nanometer ~ 50 nanometers.In the present embodiment, the described carbon nano tube structure as sounding component 12 comprises a carbon nano-tube film.A plurality of carbon nano-tube are to be arranged of preferred orient in the same direction in this carbon nano tube structure, and in carbon nano tube structure, a plurality of carbon nano-tube can be arranged along the direction perpendicular to described the first electrode and the second electrode.
Particularly, in the present embodiment, two electric conductor 142 parallel interval can be arranged to described framework 18, the surface of each electric conductor 142 is provided with conduction tack coat 14.For described sounding component 12 is fixed in this conduction tack coat 14, the electrocondution slurry of liquid state can be coated on to each electric conductor 142, and when the electrocondution slurry applying is in a liquid state, sounding component 12 be laid on electrocondution slurry.And because this sounding component 12 is a carbon nano tube structure, between the carbon nano-tube of this carbon nano tube structure, there is space, therefore this electrocondution slurry will be immersed in the space of this carbon nano tube structure, thereby liquid electrocondution slurry is immersed in described carbon nano tube structure.This electrocondution slurry solidify to form described conduction tack coat 14, makes described carbon nano tube structure be fixed on this conduction tack coat 14, and this conduction tack coat 14 infiltrates described carbon nano tube structure.Thereby make sounding component 12 be fixed on described the first electrode 14a and described the second electrode 14b, and reach the object being electrically connected to this first electrode 14a and the second electrode 14b, and then effectively improve the stability of this sound-producing device.
Owing to comprising that this sounding component 12 of carbon nano tube structure is comprised of equally distributed carbon nano-tube, because this carbon nano-tube itself has larger specific area, therefore this carbon nano tube structure also has larger specific area, less unit are thermal capacitance and larger heat-delivery surface.After input audio electrical signal, these sounding component 12 heating and cooling rapidly, produce periodic variations in temperature, and carry out fast heat exchange with surrounding medium, and can make surrounding medium density cycling change, and then sound.
The working media of described sounding component 12 is not limit, and only need meet the resistivity that its resistivity is greater than described sounding component 12.Described medium comprises gaseous medium or liquid medium.Described gaseous medium comprises air.Described liquid medium comprises one or more in non-electrolytic solution, water and organic solvent etc.
The sound pressure level of the sound-producing device 10 that the embodiment of the present invention provides is greater than 50 decibels every watt, and audible frequency scope is 1 hertz to 100,000 hertz (being 1Hz-100kHz).Described sound-producing device can be less than 3% at 500 hertz to the distortion factor within the scope of 40,000 hertz frequencies.
Refer to Fig. 4 and Fig. 5, second embodiment of the invention provides a kind of sound-producing device 20, and this sound-producing device 20 comprises a framework 28, a plurality of the first electrode 24a and a plurality of the second electrode 24b and a sounding component 22.In the present embodiment, framework 28, the first electrode 24a, the second electrode 24b and sounding component 22, identical with the structure of framework 18, the first electrode 14a, the second electrode 14b and sounding component 22 in the first embodiment.Difference is, the present embodiment comprises a plurality of the first electrode 14a and a plurality of the second electrode 14b.
Described a plurality of the first electrode 24a and a plurality of the second electrode 24b alternate intervals are arranged at described framework 28, and a plurality of the first electrode 24a and a plurality of the second electrode 24b support by described framework 28.Between every two the first adjacent electrode 24a, be provided with a second electrode 24b, between every two adjacent the second electrode 24b, be provided with a first electrode 24a, and every two adjacent first electrode 24a equate with the distance between a second electrode 24b.In the present embodiment, described sound-producing device 20 comprises four the first electrode 24a and four the second electrode 24b.
The structure of described the first electrode 24a and the second electrode 24b is identical with the structure of the first electrode 14a and 14b in the first embodiment, the conduction tack coat 24 that this first electrode 24a and the second electrode 24b comprise electric conductor 242 and be arranged at these electric conductor 242 surfaces.The material of this electric conductor 242 is metal or alloy, as one or more in stainless steel, copper, iron, cobalt, nickel, platinum or palladium, or is the alloy of above-mentioned metal.That the shape of this electric conductor 242 may be selected to be is bar-shaped, a kind of in strip, bulk or other shape.In the present embodiment, these electric conductor 242 materials are preferably stainless steel, are shaped as rectangular bar-shaped.The material of described conduction tack coat 24 is electrocondution slurry or conducting resinl, and the Main Ingredients and Appearance of this electrocondution slurry or conducting resinl includes metallic particles, binding agent and solvent etc., and described metallic particles can be gold grain, silver-colored particle or alumina particles etc.The present embodiment is preferably conductive silver slurry, and the metallic particles in this electrocondution slurry is silver-colored particle.
In the present embodiment, eight electric conductor 242 parallel interval can be arranged to described framework 28, the surface of each electric conductor 242 is provided with conduction tack coat 24.For described sounding component 22 is fixed in this conduction tack coat 24, the electrocondution slurry of liquid state can be coated on to each electric conductor 242, and when the electrocondution slurry applying is in a liquid state, sounding component 22 be laid on liquid electrocondution slurry.And because this sounding component 22 is a carbon nano tube structure, between the carbon nano-tube of this carbon nano tube structure, there is space, therefore this electrocondution slurry will be immersed in the space of this carbon nano tube structure, thereby liquid electrocondution slurry is immersed in described carbon nano tube structure.After this electrocondution slurry solidify to form described conduction tack coat 24, can make described carbon nano tube structure be fixed on this conduction tack coat 24, and this conduction tack coat 24 infiltrate described carbon nano tube structure.Thereby make sounding component 22 be fixed on described the first electrode 24a and described the second electrode 24b, and reach the object being electrically connected to this first electrode 24a and the second electrode 24b, and then effectively improve the stability of this sound-producing device.
Described sounding component 22 is identical with the sounding component 12 in the first embodiment, and this sounding component is a carbon nano tube structure, and this carbon nano tube structure comprises at least one carbon nano-tube film.
Described sound-producing device 20 can be by described a plurality of the first electrode 24a and a plurality of the second electrode 24b access external signal sounding.Particularly, after can first described a plurality of the first electrode 24a being connected with a conductive component, be electrically connected to one end of a signal input apparatus, then be electrically connected to the other end of described signal input apparatus after described a plurality of the second electrode 24b are connected with conductive component.Above-mentioned connected mode can realize the parallel connection of the sounding component 22 between adjacent electrode.Sounding component 22 after parallel connection has less resistance, can reduce the operating voltage of this sound-producing device 20.
As shown in FIG. 6 and 7, third embodiment of the invention provides a kind of sound-producing device 30, and this sound-producing device 30 comprises a matrix 38, a plurality of the first electrode 34a, a plurality of the second electrode 34b and a sounding component 32.
Described matrix 38 mainly plays carrying described a plurality of the first electrode 34a, described a plurality of the second electrode 34b and described sounding component 32.Shape and the size of this matrix 38 are not limit, and material is the material of insulating material or poorly conductive.In addition, the material of this matrix 38 should have good heat-insulating property, thereby prevents that the heat that this sounding component 32 produces from being absorbed by this matrix 38, cannot reach the object of circumference medium and then sounding.The material of this matrix 38 can be glass, resin or pottery etc.In the present embodiment, described matrix 38 is a foursquare glass plate.
Described a plurality of the first electrode 34a and described a plurality of the second electrode 34b alternate intervals are arranged at described matrix 38.Between every two the first adjacent electrode 34a, be provided with a second electrode 34b, between every two the second adjacent electrode 34b, be provided with a first electrode 34a, and every two adjacent first electrode 34a equate with the distance between a second electrode 34b.
Described the first electrode 34a and the second electrode 34b can be stratiform (thread or banded), bar-shaped, strip, bulk or other shape, and its section shape is round, square, trapezoidal, triangle or irregularly shaped.For preventing that the heat of sounding component 32 from too much being absorbed and affecting sounding effect by this first electrode 34a and the second electrode 34b, the contact area of this first electrode 34a and the second electrode 34b and sounding component 32 is less of well, so the shape of this first electrode 34a and the second electrode 34b is preferably thread or banded.The material of described the first electrode 34a and the second electrode 34b may be selected to be metal, conducting resinl, electrocondution slurry or indium tin oxide (ITO) etc.The height of described the first electrode 34a and the second electrode 34b is not limit, and is preferably 10 microns ~ 1 centimetre.In the present embodiment, the material of this first electrode 34a and the second electrode 34b is electrocondution slurry, is shaped as elongated strip shaped, is highly 15 microns.
Described sounding component 32 is identical with the sounding component 12 in the first embodiment, is a carbon nano tube structure, and this carbon nano tube structure comprises at least one carbon nano-tube film.This sounding component 32 is arranged at described a plurality of the first electrode 34a and described a plurality of the second electrode 34b.And this sounding component 32 is fixed on described a plurality of the first electrode 34a and described a plurality of the second electrode 34b.
Be appreciated that the first electrode 34a in third embodiment of the invention and the quantity of the second electrode 34b do not limit, the sound-producing device 30 in the present embodiment also can only comprise a first electrode 34a and a second electrode 34b.
In the present embodiment, can adopt the method for silk screen printing that electrocondution slurry is printed on matrix 38, form four the first electrode 34a and four the second electrode 34b, these four the first electrode 34a and four the second electrode 34b alternate intervals and be arranged in parallel.When electrocondution slurry is liquid state, sounding component 32 is arranged to this liquid state electrocondution slurry.Because this sounding component 32 is a carbon nano tube structure, between a plurality of carbon nano-tube of described carbon nano tube structure, there is gap.This liquid state electrocondution slurry is immersed in the gap of this carbon nano tube structure, thereby described electrocondution slurry is immersed in carbon nano tube structure.Then solidify this liquid state electrocondution slurry, after described liquid electrocondution slurry solidifies, form four the first electrode 34a and four the second electrode 34b, this sounding component 32 is fixed on described four the first electrode 34a and four the second electrode 34b.Described the first electrode 34a and the second electrode 34b also play a supporting role to sounding component 32.
In the present embodiment, described sound-producing device 30 further comprises one first conductive component 346 and one second conductive component 348.The first conductive component 346 is electrically connected to the first electrode 32a and the second electrode 32b in sound-producing device 30 respectively with the second conductive component 348.Sound-producing device 30 is electrically connected to external circuit by this first conductive component 346 and the second conductive component 348, thereby input audio signal is to this sounding component 32.
Compared with prior art, the sound-producing device of the embodiment of the present invention has the following advantages: the electrocondution slurry or the conduction tack coat that due to described the first electrode and described the second electrode, comprise infiltrate in described carbon nano tube structure, both can guarantee that this carbon nano tube structure was well fixed on this first electrode and this second electrode, also increased the contact area of this sounding component and this first electrode and the second electrode, make this sounding component and this first electrode and the second electrode there is good electrical connectivity, make the stability of this sound-producing device better.
In addition, those skilled in the art also can do other and change in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention, within all should being included in the present invention's scope required for protection.
Claims (12)
1. a sound-producing device, it comprises:
One matrix;
One first electrode and one second electrode gap are arranged at described matrix, and the material of this first electrode and the second electrode is electrocondution slurry;
One sounding component, this sounding component comprises a carbon nano tube structure, this carbon nano tube structure is fixed on described the first electrode with described the second electrode and is electrically connected to it;
It is characterized in that, described electrocondution slurry infiltrates in carbon nano tube structure.
2. sound-producing device as claimed in claim 1, is characterized in that, described sounding component comprises a plurality of the first electrodes and a plurality of the second electrode, and the plurality of the first electrode and a plurality of the second electrode alternate intervals setting.
3. sound-producing device as claimed in claim 2, is characterized in that, every two adjacent first electrodes and the distance between second electrode equate.
4. sound-producing device as claimed in claim 1, is characterized in that, described the first electrode and the second electrode are for being thread, banded, bar-shaped, strip or bulk.
5. sound-producing device as claimed in claim 1, is characterized in that, described carbon nano tube structure comprises at least one carbon nano-tube film, the composite construction of a plurality of carbon nano tube lines or a carbon nano-tube film and carbon nano tube line.
6. sound-producing device as claimed in claim 1, is characterized in that, described the first electrode and described the second electrode be arranged in parallel.
7. sound-producing device as claimed in claim 1, is characterized in that, the composition of this electrocondution slurry or conducting resinl comprises metallic particles, binding agent and solvent.
8. sound-producing device as claimed in claim 7, is characterized in that, described metallic particles is gold grain, silver-colored particle or alumina particles.
9. sound-producing device as claimed in claim 1, is characterized in that, described electrocondution slurry infiltrates in carbon nano tube structure and oozes out from this carbon nano tube structure surface, and this carbon nano tube structure is embedded in first electrode and one second electrode of this electrocondution slurry formation.
10. sound-producing device as claimed in claim 9, is characterized in that, described the first electrode and the second electrode pair sounding component are also played a supporting role.
11. sound-producing devices as claimed in claim 1, is characterized in that, described carbon nano tube structure is only fixed by described the first electrode and the second electrode.
12. sound-producing devices as claimed in claim 1, is characterized in that, described carbon nano tube structure and described matrix interval arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410149689.4A CN103987008B (en) | 2008-12-30 | 2008-12-30 | sound-producing device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810191738.5A CN101771919B (en) | 2008-12-30 | 2008-12-30 | Sounding device |
| CN201410149689.4A CN103987008B (en) | 2008-12-30 | 2008-12-30 | sound-producing device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810191738.5A Division CN101771919B (en) | 2008-12-30 | 2008-12-30 | Sounding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103987008A true CN103987008A (en) | 2014-08-13 |
| CN103987008B CN103987008B (en) | 2017-09-12 |
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| CN201410149689.4A Active CN103987008B (en) | 2008-12-30 | 2008-12-30 | sound-producing device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003319490A (en) * | 2002-04-19 | 2003-11-07 | Sony Corp | Diaphragm and manufacturing method thereof, and speaker |
| CN1941249A (en) * | 2005-09-30 | 2007-04-04 | 清华大学 | Field transmitter and its production |
| CN101288336A (en) * | 2005-10-14 | 2008-10-15 | Kh化学有限公司 | Acoustic diaphragm and speakers having the same |
-
2008
- 2008-12-30 CN CN201410149689.4A patent/CN103987008B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003319490A (en) * | 2002-04-19 | 2003-11-07 | Sony Corp | Diaphragm and manufacturing method thereof, and speaker |
| CN1941249A (en) * | 2005-09-30 | 2007-04-04 | 清华大学 | Field transmitter and its production |
| CN101288336A (en) * | 2005-10-14 | 2008-10-15 | Kh化学有限公司 | Acoustic diaphragm and speakers having the same |
Non-Patent Citations (1)
| Title |
|---|
| LIN XIAO ET AL.: "《Flexible,Stretchable,Transparent,Carbon Nanotube Thin Film Loudspeakers》", 《NANO LETTERS》 * |
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| CN103987008B (en) | 2017-09-12 |
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