CN103987008B - sound-producing device - Google Patents
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- CN103987008B CN103987008B CN201410149689.4A CN201410149689A CN103987008B CN 103987008 B CN103987008 B CN 103987008B CN 201410149689 A CN201410149689 A CN 201410149689A CN 103987008 B CN103987008 B CN 103987008B
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Abstract
The present invention relates to a kind of sound-producing device, it includes：One matrix, a sounding component, a first electrode and a second electrode are arranged at intervals at described matrix, and the material of the first electrode and second electrode is electrocondution slurry.The sounding component includes a carbon nano tube structure, and the carbon nano tube structure is fixed on the first electrode and the second electrode and is connected electrically.The electrocondution slurry is penetrated into carbon nano tube structure.The sound-producing device effectively improves the electrical connectivity between carbon nano tube structure and electrode so that the stability of the sound-producing device is preferable.
Description
The application is filed in 30 days December in 2008 200810191738.5 divisional application.
Technical field
The present invention relates to a kind of sound-producing device, more particularly to a kind of sound-producing device based on CNT.
Background technology
Sound-producing device is typically made up of signal input apparatus and sounding component, by signal input apparatus input signal to should
Sounding component, and then send sound.Thermo-acoustic device is one kind in sound-producing device, and it is a kind of hair based on thermoacoustic effect
Acoustic device, H.D.Arnold and I.B.Crandall are in document " The thermophone as a precision source
A kind of simple thermo-acoustic device is described in of sound ", Phys. Rev. 10, p22-38 (1917), it is used
One platinized platinum makees sounding component.Because the audible frequency and its unit area thermal capacitance of sounding component are closely related, i.e. unit plane accumulated heat
Rong great, then audible frequency narrow range, intensity of acoustic wave is low；Unit area thermal capacitance is small, then audible frequency scope is wide, and intensity of acoustic wave is high.
Therefore, it is intended to obtain with wider audible frequency scope and higher intensity of acoustic wave, then requires the unit plane accumulated heat of sounding component
Hold smaller better.And with smaller thermal capacitance metal platinized platinum, limited in itself by material, its thickness minimum can only up to 0.7 micron,
And make the sound-producing device of sounding component using the platinized platinum, the audible frequency highest produced by it is only up to 4 KHzs.
In addition, Fan Shoushan et al. discloses a kind of sound-producing device of application CNT, refer to document " Flexible,
Stretchable, Transparent Carbon Nanotube Thin Film Loudspeakers ", model keep kind et
al., Nano Letters, Vol.8 (12), p4539-4545 (2008).Fig. 1 is referred to, the sound-producing device 100 includes
One substrate 108, a carbon nano-tube film 104 and two electrodes 106.The carbon nano-tube film 104 is arranged in the substrate 108, and this two
Individual electrode 106 is electrically connected with the carbon nano-tube film 104 respectively, and being provided by electric current makes the thermic sounding of spy nanotube films 104.By
In the sound-producing device 100 using carbon nano-tube film 104 as sounding component, the carbon nano-tube film 104, which has, greatly compares surface
Long-pending and minimum unit area thermal capacitance and very thin thickness, so the sound-producing device 100 can send the sound wave that human ear can be heard
Intensity, and with wider audible frequency scope (100Hz ~ 100kHz).
However, because described carbon nano-tube film 104 is directly to be contacted by the viscosity of itself with two electrode 106,
So, the adhesion of the carbon nano-tube film 104 and described two electrodes 106 is smaller, and the fixation with described two electrodes 106 is inadequate
Firmly, it is thus possible to the electrical connection effect between the carbon nano-tube film 104 and two electrodes 106 is reduced, so that further
It has impact on the sounding effect and stability of whole sound-producing device 100.
The content of the invention
In view of this, filled it is necessory to provide a kind of sounding of electrical connectivity between effective lifting sounding component and electrode
Put.
A kind of sound-producing device, it includes：One matrix, a sounding component, a first electrode and a second electrode are arranged at intervals
In described matrix, the material of the first electrode and second electrode is electrocondution slurry.The sounding component includes a carbon nano tube structure,
The carbon nano tube structure is fixed on the first electrode and the second electrode and is connected electrically.The electrocondution slurry penetrates into carbon
In nano tube structure.
Compared with prior art, the sound-producing device has advantages below：Due to the first electrode and described second
The electrocondution slurry or conductive adhesion layer that electrode includes are penetrated into the carbon nano tube structure, can both ensure the carbon nano tube structure
The first electrode and the second electrode are well fixed on, the sounding component and the first electrode and second electrode is also increased
Contact area, makes the sounding component have good electrical connectivity with the first electrode and second electrode so that the sound-producing device
Stability it is preferable.
Brief description of the drawings
Fig. 1 is a kind of profile of sound-producing device in the prior art.
Fig. 2 is the top view for the sound-producing device that first embodiment of the invention is provided.
Fig. 3 is the profile that III-III lines are splitted along along Fig. 2.
Fig. 4 is the top view for the sound-producing device that second embodiment of the invention is provided.
Fig. 5 is the profile that V-V lines are splitted along along Fig. 4.
Fig. 6 is the top view for the sound-producing device that third embodiment of the invention is provided.
Fig. 7 is the profile that VII-VII lines are splitted along along Fig. 6.
Main element symbol description
| Sound-producing device | 10,20,30 |
| Sounding component | 12,22,32 |
| Framework | 18,28 |
| First electrode | 14a, 24a, 34a |
| Second electrode | 14b, 24b, 34b |
| Matrix | 38 |
| Electric conductor | 142,242 |
| Conductive adhesion layer | 14,24, |
| First conductive component | 346 |
| Second conductive component | 348 |
Following embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.
Embodiment
Describe the sound-producing device of the embodiment of the present invention in detail below with reference to accompanying drawing.
Fig. 2 and Fig. 3 is referred to, first embodiment of the invention provides a kind of sound-producing device 10, and the sound-producing device 10 includes one
Framework 18, a first electrode 14a, a second electrode 14b and a sounding component 12.
The framework is to support the first electrode and the second electrode, in the present embodiment, and it is in a frame that the framework, which is,
Frame structure, the first electrode is linked to the frame structure with second electrode suspension.The framework 18 is made by insulating materials, should
Insulating materials is glass, ceramics, resin, wood materials, quartz or plastics etc..In the present embodiment, the material of the framework 18 is
Resin.
The first electrode 14a and second electrode 14b parallel intervals are arranged at the framework 18.First electrode 14a with
The mode such as second electrode 14b can be bolted or binding agent is bonded, by first electrode 14a and second electrode 14b two ends
It is fixed on the framework 18.The sounding component 12 is layed in the first electrode 14a and second electrode 14b, with this
One electrode 14a and second electrode 14b electrical connections.The first electrode 14a and second electrode 14b, which also has, supports the sounding member
The effect of part 12.
The first electrode 14a is identical with the structure of the second electrode 14b, first electrode 14a and second electrode 14b
Including electric conductor 142 and it is arranged at the conductive adhesion layer 14 of the electric conductor 142.The material of electric conductor 142 is metal or alloy,
One or more in such as stainless steel, copper, iron, cobalt, nickel, platinum or palladium, or be the alloy of above-mentioned metal.The electric conductor 142
Shape may be selected to be one kind in bar-shaped, strip, bulk or other shapes.In the present embodiment, the material of the electric conductor 142 is preferred
For stainless steel, strip is shaped as bar-shaped.
The material of the conductive adhesion layer 14 is the Main Ingredients and Appearance of electrocondution slurry or conducting resinl, the electrocondution slurry or conducting resinl
Include metallic particles, binding agent and solvent etc., described metallic particles can be gold grain, Argent grain or alumina particles etc..This reality
It is Argent grain to apply the metallic particles in example preferably conductive silver slurry, the i.e. electrocondution slurry.
The sounding component 12 includes a carbon nano tube structure.The carbon nano tube structure includes an at least carbon nano-tube film, extremely
A few liner structure of carbon nano tube or its combination.The thickness of the carbon nano tube structure（It is diameter during linear structure）For 0.5
Nanometer ~ 1 millimeter.Preferably, the thickness of the carbon nano tube structure is 0.5 micron.The unit plane accumulated heat of the carbon nano tube structure
Appearance is smaller than 2 × 10-4Joules per cm Kelvin.Preferably, the unit area thermal capacitance of the carbon nano tube structure is less than
1.7×10-6Joules per cm Kelvin.
CNT in the carbon nano tube structure includes single-walled carbon nanotube, double-walled carbon nano-tube and multi-wall carbon nano-tube
One or more in pipe.A diameter of 0.5 nanometer ~ 50 nanometers of the single-walled carbon nanotube, the double-walled carbon nano-tube it is straight
Footpath is 1.0 nanometers ~ 50 nanometers, a diameter of 1.5 nanometers ~ 50 nanometers of the multi-walled carbon nanotube.In the present embodiment, the conduct
The carbon nano tube structure of sounding component 12 includes a carbon nano-tube film.Multiple CNTs are edges in the carbon nano tube structure
Same direction is arranged of preferred orient, and multiple CNTs can be along perpendicular to the first electrode and the second electricity in carbon nano tube structure
The direction arrangement of pole.
Specifically, in the present embodiment, two parallel intervals of electric conductor 142 can be arranged at the framework 18, each
The surface of electric conductor 142 is provided with conductive adhesion layer 14., can to make the sounding component 12 be fixed in the conductive adhesion layer 14
The electrocondution slurry of liquid state is coated on each electric conductor 142, and when the electrocondution slurry of coating is in a liquid state, by sounding component
12 are laid on electrocondution slurry.And because the sounding component 12 is a carbon nano tube structure, the carbon nanometer of the carbon nano tube structure
There is space between pipe, therefore the electrocondution slurry will be immersed in the space of the carbon nano tube structure, so that the conduction of liquid
Slurry is immersed in the carbon nano tube structure.The electrocondution slurry solidify to form the conductive adhesion layer 14, makes the carbon nanometer
Tubular construction is fixed on the conductive adhesion layer 14, and the conductive adhesion layer 14 penetrates into the carbon nano tube structure.So that sounding
Element 12 is fixed on the first electrode 14a and second electrode 14b, and reaches and first electrode 14a and second electrode
The purpose of 14b electrical connections, and then effectively improve the stability of the sound-producing device.
By the sounding component 12 including carbon nano tube structure is made up of equally distributed CNT, due to this
CNT has larger specific surface area in itself, therefore the carbon nano tube structure also has larger specific surface area, less list
Plane accumulated heat is held and larger heat-delivery surface.After input audio electrical signal, the sounding component 12 can heating and cooling rapidly, generation week
The temperature change of phase property, and heat exchange is quickly carried out with surrounding medium, and can make surrounding medium density cycling change
Become, and then send sound.
The working media of the sounding component 12 is not limited, and need to only meet the resistance that its resistivity is more than the sounding component 12
Rate.The medium includes gaseous medium or liquid medium.The gaseous medium includes air.The liquid medium includes non-
One or more in electrolyte solution, water and organic solvent etc..
The sound pressure level of sound-producing device 10 provided in an embodiment of the present invention is more than 50 decibels every watt, and audible frequency scope is 1 hertz
Hereby to 100,000 hertz (i.e. 1Hz-100kHz).The distortion factor of the sound-producing device in 500 hertz to 40,000 frequency ranges can
Less than 3%.
Fig. 4 and Fig. 5 is referred to, second embodiment of the invention provides a kind of sound-producing device 20, and the sound-producing device 20 includes one
Framework 28, multiple first electrode 24a and multiple second electrode 24b and a sounding component 22.In the present embodiment, framework 28,
One electrode 24a, second electrode 24b and sounding component 22, with the framework 18 in first embodiment, first electrode 14a, the second electricity
The structure of pole 14b and sounding component 22 is identical.Difference is that the present embodiment includes multiple first electrode 14a and many
Individual second electrode 14b.
The multiple first electrode 24a and multiple second electrode 24b alternate intervals are arranged at the framework 28, and multiple
One electrode 24a and multiple second electrode 24b are supported by the framework 28.Set between the adjacent first electrode 24a of each two
Have and be provided with a first electrode 24a between a second electrode 24b, each two adjacent second electrode 24b, and each two is adjacent
A first electrode 24a it is equal with the distance between a second electrode 24b.In the present embodiment, the sound-producing device 20 is wrapped
Include four first electrode 24a and four second electrode 24b.
First electrode 14a and 14b knot in the structure and first embodiment of the first electrode 24a and second electrode 24b
Structure is identical, and first electrode 24a and second electrode 24b includes electric conductor 242 and is arranged at the conduction on the surface of electric conductor 242
Tack coat 24.The material of the electric conductor 242 is metal or alloy, one kind in such as stainless steel, copper, iron, cobalt, nickel, platinum or palladium or
It is a variety of, or be the alloy of above-mentioned metal.The shape of the electric conductor 242 may be selected to be in bar-shaped, strip, bulk or other shapes
One kind.In the present embodiment, the material of electric conductor 242 is preferably stainless steel, is shaped as strip bar-shaped.The conductive adhesion layer 24
Material be electrocondution slurry or conducting resinl, the Main Ingredients and Appearance of the electrocondution slurry or conducting resinl include metallic particles, binding agent and
Solvent etc., described metallic particles can be gold grain, Argent grain or alumina particles etc..The present embodiment is preferably conductive silver slurry, should
Metallic particles in electrocondution slurry is Argent grain.
In the present embodiment, eight parallel intervals of electric conductor 242 can be arranged at the framework 28, each electric conductor
242 surface is provided with conductive adhesion layer 24., can be by liquid to make the sounding component 22 be fixed in the conductive adhesion layer 24
The electrocondution slurry of shape is coated on each electric conductor 242, and when the electrocondution slurry of coating is in a liquid state, sounding component 22 is tiled
On liquid electrocondution slurry.And because the sounding component 22 is a carbon nano tube structure, the CNT of the carbon nano tube structure
Between there is space, therefore the electrocondution slurry will be immersed in the space of the carbon nano tube structure, so that the conductive paste of liquid
Material is immersed in the carbon nano tube structure.After the electrocondution slurry solidify to form the conductive adhesion layer 24, the carbon can be made
Nano tube structure is fixed on the conductive adhesion layer 24, and the conductive adhesion layer 24 penetrates into the carbon nano tube structure.So that
Sounding component 22 is fixed on the first electrode 24a and second electrode 24b, and reaches and first electrode 24a and second
The purpose of electrode 24b electrical connections, and then effectively improve the stability of the sound-producing device.
The sounding component 22 is identical with the sounding component 12 in first embodiment, and the sounding component is a CNT knot
Structure, the carbon nano tube structure includes an at least carbon nano-tube film.
The sound-producing device 20 can access external signal by the multiple first electrode 24a and multiple second electrode 24b
Sounding.Specifically, one end after first the multiple first electrode 24a can be connected with a conductive component with a signal input apparatus
Electrical connection, then the other end after the multiple second electrode 24b is connected with conductive component with the signal input apparatus are electrically connected
Connect.Above-mentioned connected mode can realize the parallel connection of the sounding component 22 between adjacent electrode.Sounding component 22 after parallel connection have compared with
Small resistance, it is possible to decrease the operating voltage of the 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 the sound-producing device 30 includes one
Matrix 38, multiple first electrode 34a, multiple second electrode 34b and a sounding component 32.
Described matrix 38 mainly plays the multiple first electrode 34a of carrying, the multiple second electrode 34b and the sounding
The effect of element 32.The shape of the matrix 38 is not limited with size, and material is the material of insulating materials or poorly conductive.In addition, should
The material of matrix 38 should have preferable heat-insulating property, so as to prevent the heat that the sounding component 32 is produced from being inhaled by the matrix 38
Receive, it is impossible to reach the purpose of heats surrounding media and then sounding.The material of the matrix 38 can be glass, resin or ceramics etc..This
In embodiment, described matrix 38 is the glass plate of a square.
The multiple first electrode 34a is arranged at described matrix 38 with the multiple second electrode 34b alternate intervals.Every two
It is provided between a second electrode 34b, the adjacent second electrode 34b of each two and sets between individual adjacent first electrode 34a
There is the distance between a first electrode 34a, and an each two adjacent first electrode 34a and second electrode 34b phase
Deng.
The first electrode 34a and second electrode 34b can be in stratiforms (thread or banding), bar-shaped, strip, block or other
Shape, its section shape is round, square, trapezoidal, triangle or irregular shape.To prevent the heat of sounding component 32 by this
First electrode 34a and second electrode 34b excessively absorbs and influences sounding effect, first electrode 34a and second electrode 34b and hair
The contact area of sound component 32 is smaller preferably, therefore first electrode 34a and second electrode 34b is preferably shaped to thread or band
Shape.The material of the first electrode 34a and second electrode 34b may be selected to be metal, conducting resinl, electrocondution slurry or indium tin oxide
（ITO）Deng.The height of the first electrode 34a and second electrode 34b are not limited, preferably 10 microns ~ 1 centimetre.In the present embodiment,
First electrode 34a and second electrode 34b material are electrocondution slurry, are shaped as elongated strip shaped, are highly 15 microns.
The sounding component 32 is identical with the sounding component 12 in first embodiment, is a carbon nano tube structure, and the carbon is received
Nanotube structures include an at least carbon nano-tube film.The sounding component 32 is arranged at the multiple first electrode 34a and the multiple
Second electrode 34b.Also, the sounding component 32 is fixed on the multiple first electrode 34a and the multiple second electrode 34b.
It is appreciated that the quantity of the first electrode 34a and second electrode 34b in third embodiment of the invention are not limited, this reality
An a first electrode 34a and second electrode 34b can also only be included by applying the sound-producing device 30 in example.
In the present embodiment, electrocondution slurry can be printed on matrix 38 using the method for silk-screen printing, form four first
Electrode 34a and four second electrode 34b, four first electrode 34a and four second electrode 34b alternate intervals and parallel set
Put.Sounding component 32 is arranged at the liquid electrocondution slurry when electrocondution slurry is liquid.Because the sounding component 32 is a carbon
There is gap between nano tube structure, multiple CNTs of the carbon nano tube structure.The liquid electrocondution slurry is immersed in this
In the gap of carbon nano tube structure, so that in electrocondution slurry immersion carbon nano tube structure.Then the liquid is solidified conductive
Slurry, after after liquid electrocondution slurry solidification, forms four first electrode 34a and four second electrode 34b, the sounding component
32 are fixed on four first electrode 34a and four second electrode 34b.The first electrode 34a and second electrode 34b are to hair
Sound component 32 also acts as supporting role.
In the present embodiment, the sound-producing device 30 further comprises one first conductive component 346 and one second conductive component
348.First conductive component 346 and the second conductive component 348 respectively with the first electrode 32a and second electrode in sound-producing device 30
32b is electrically connected.Sound-producing device 30 is electrically connected by the conductive component 348 of the first conductive component 346 and second with external circuit, from
And input audio signal is to the sounding component 32.
Compared with prior art, the sound-producing device of the embodiment of the present invention has advantages below：Due to the first electrode
And the electrocondution slurry that includes of the second electrode or conductive adhesion layer are penetrated into the carbon nano tube structure, can both ensure the carbon
Nano tube structure is well fixed on the first electrode and the second electrode, also increase the sounding component and the first electrode and
The contact area of second electrode, makes the sounding component have good electrical connectivity with the first electrode and second electrode so that
The stability of the sound-producing device is preferable.
In addition, those skilled in the art can also do other changes in spirit of the invention, certainly, these are according to present invention essence
The change that god is done, should all be included within scope of the present invention.
Claims (12)
1. a kind of sound-producing device, it includes：
One matrix；
One first electrode and a second electrode are arranged at intervals at described matrix, and the material of the first electrode and second electrode is conduction
Slurry；
One sounding component, the sounding component includes a carbon nano tube structure, and the carbon nano tube structure is fixed on the first electrode
With the second electrode and being connected electrically；
Characterized in that, the electrocondution slurry is penetrated into carbon nano tube structure.
2. sound-producing device as claimed in claim 1, it is characterised in that the sounding component includes multiple first electrodes and multiple
Second electrode, and the plurality of first electrode and the setting of multiple second electrode alternate intervals.
3. sound-producing device as claimed in claim 2, it is characterised in that an adjacent first electrode of each two and one second
The distance between electrode is equal.
4. sound-producing device as claimed in claim 1, it is characterised in that the first electrode and second electrode are in thread, band
Shape, bar-shaped, strip or bulk.
5. sound-producing device as claimed in claim 1, it is characterised in that the carbon nano tube structure includes an at least CNT
The composite construction of film, multiple carbon nano tube lines or a carbon nano-tube film and carbon nano tube line.
6. sound-producing device as claimed in claim 1, it is characterised in that the first electrode is parallel with the second electrode to be set
Put.
7. sound-producing device as claimed in claim 1, it is characterised in that the composition of the electrocondution slurry or conducting resinl includes metal
Grain, binding agent and solvent.
8. sound-producing device as claimed in claim 7, it is characterised in that described metallic particles is gold grain, Argent grain or aluminium
Particle.
9. sound-producing device as claimed in claim 1, it is characterised in that the electrocondution slurry penetrate into carbon nano tube structure and from
The carbon nano tube structure surface is oozed out, and the carbon nano tube structure is embedded in the first electrode and one second electricity of electrocondution slurry formation
In extremely.
10. sound-producing device as claimed in claim 9, it is characterised in that the first electrode and second electrode are to sounding component
Also act as supporting role.
11. sound-producing device as claimed in claim 1, it is characterised in that the carbon nano tube structure only passes through the described first electricity
Pole and second electrode are fixed.
12. sound-producing device as claimed in claim 1, it is characterised in that the carbon nano tube structure is set with described matrix interval
Put.
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 CN103987008A (en) | 2014-08-13 |
| CN103987008B true CN103987008B (en) | 2017-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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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 |
|---|
| 《Flexible,Stretchable,Transparent,Carbon Nanotube Thin Film Loudspeakers》;Lin Xiao et al.;《NANO LETTERS》;20081029;第8卷(第12期);4539-4545 * |
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| CN103987008A (en) | 2014-08-13 |
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