CN210868154U - Flexible film applied to directional sound production - Google Patents
Flexible film applied to directional sound production Download PDFInfo
- Publication number
- CN210868154U CN210868154U CN201921762963.XU CN201921762963U CN210868154U CN 210868154 U CN210868154 U CN 210868154U CN 201921762963 U CN201921762963 U CN 201921762963U CN 210868154 U CN210868154 U CN 210868154U
- Authority
- CN
- China
- Prior art keywords
- sound production
- directional sound
- adhesive layer
- piezoelectric
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The utility model provides a be applied to flexible membrane of directional sound production, include: the graphene layer is compounded on two sides of the planar substrate; the planar base material is obtained by compounding at least two piezoelectric films; the utility model discloses a signal strength and the practicality of flexible membrane structure can effectively be strengthened to the graphite alkene structure.
Description
Technical Field
The utility model relates to a directional audio frequency field of handling especially relates to a be applied to flexible membrane of directional sound production.
Background
Piezoelectric materials are used for manufacturing loudspeakers, and are usually placed between two electrodes by utilizing an inverse piezoelectric effect, and the piezoelectric materials are activated by an alternating electric field between the electrodes to generate mechanical deformation so as to generate sound. However, most of the loudspeakers based on the membrane structure in the market at present usually integrate the electrodes on the piezoelectric material directly, but the compatibility problem of the electrodes and the piezoelectric material greatly affects the service life of the piezoelectric material and also greatly limits the practical application scene of the product; in addition, for flexible piezoelectric materials, an additional fixing frame is often needed for supporting and fixing, and the structure is complex.
SUMMERY OF THE UTILITY MODEL
In view of the problem that prior art exists above, the utility model provides a be applied to oriented sound production's flexbile membrane mainly solves the problem that oriented sound production product structure is complicated, intensity is low and life is short based on the film.
In order to achieve the above and other objects, the present invention adopts the following technical solutions.
A flexible membrane for use in directional sound production, comprising:
the graphene layer is compounded on two sides of the planar substrate;
wherein, the planar substrate is obtained by compounding at least two piezoelectric films.
Optionally, the piezoelectric film comprises at least one of: polyvinylidene fluoride, zinc oxide piezoelectric film.
Optionally, a first adhesive layer is disposed between the piezoelectric films, and the two piezoelectric films are combined by bonding the first adhesive layer.
Optionally, the first adhesive layer is a light-transmitting adhesive layer.
Optionally, a second adhesive layer is disposed between the graphene layer and the planar substrate, and the graphene layer and the planar substrate are compounded through the second adhesive layer.
Optionally, the second adhesive layer is a light-transmitting adhesive layer.
Optionally, the graphene layer is multi-layer graphene, and the thickness of the graphene layer is 20-50 microns.
Optionally, the thickness of the first glue layer is 20-50 microns; the thickness of the second glue layer is 20-50 microns.
Optionally, the piezoelectric film has a thickness of 20-50 microns.
As mentioned above, the utility model relates to a be applied to oriented sound production's flexile membrane has following beneficial effect.
The signal intensity can be effectively enhanced through the multilayer piezoelectric film; by utilizing the light transmission of the graphene, a high-light-transmission directional loudspeaker can be manufactured, and the functionality and the practicability of the product are enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a flexible film applied to directional sound production in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a flexible membrane applied to orientation generation in another embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
Referring to fig. 1, the present invention provides a flexible film for directional sound production, which includes at least a planar substrate and graphene layers 1 compounded on two sides of the planar substrate. Graphene layer 1 can regard as the electrode, is connected two-layer graphene layer 1 and alternating current signal, through the voltage variation of alternating voltage on two graphene layer 1, and then causes the electric field change that forms between two graphene layer 1.
In one embodiment, the planar substrate includes at least two piezoelectric films 2, a first adhesive layer 3 may be disposed between each two piezoelectric films 2, and the piezoelectric films 2 are bonded together two by two through the adhesive layers to obtain the planar substrate. The stability of the structure can be improved through the first glue layer 3, the surface tension of the film structure is enhanced, and the service life of the planar substrate can be prolonged.
In one embodiment, the piezoelectric film 2 may be a polyvinylidene chloride (PVDF) or zinc oxide piezoelectric film, which can generate inverse piezoelectric effect. For example, the piezoelectric flexible film made of the polyvinylidene chloride film has high chemical stability, low hygroscopicity, high thermal stability, high ultraviolet radiation resistance, high impact resistance and fatigue resistance, the chemical stability of the piezoelectric flexible film is 10 times higher than that of ceramic, the acoustic impedance of the piezoelectric flexible film is close to that of water, the matching state is good, and the application sensitivity is high; the PVDF piezoelectric film has high resonant frequency of stretching vibration in the thickness direction, can obtain wider flat response, and has frequency response width superior to that of a common piezoelectric ceramic transducer. In addition, the material is a zinc oxide piezoelectric film which has excellent piezoelectric, photoelectric, gas-sensitive and pressure-sensitive properties, and a high-quality monocrystal or polycrystal ZnO film with preferred c-axis orientation has excellent piezoelectric properties, so that the zinc oxide piezoelectric film can be used for preparing piezoelectric converters such as high-frequency fiber acousto-optic devices, ultrasonic and acousto-optic modulators and the like.
In an embodiment, the first adhesive layer 3 can be obtained by curing liquid glue, such as loctite glue H-1502PP, and has high adhesion and yellowing resistance by ultraviolet curing. The uneven area at the bonding space is filled by utilizing the fluidity of the glue, so that the flatness and the uniformity of the obtained planar base material are ensured.
In another embodiment, the bonding between the piezoelectric films can also be realized by pressing a solid adhesive film to form the first adhesive layer 3.
In an embodiment, a second glue layer 4 may be disposed between the graphene layer 1 and the planar substrate, and the graphene layer 1 is bonded to the planar substrate through the second glue layer 4. The stability of the graphene layer 1 and the planar substrate stacking structure is guaranteed in a bonding mode.
In an embodiment, the second adhesive layer 4 may also be obtained by curing liquid glue, such as loctite glue H-1502PP, which has high adhesion and is resistant to yellowing through uv curing. The uneven area at the bonding space is filled by utilizing the fluidity of the glue, so that the flatness and the uniformity of the obtained planar base material are ensured.
In another embodiment, the graphene layer and the planar substrate may be bonded by a solid adhesive film to form the second adhesive layer 4.
Specifically, two first adhesive layers 3, two graphene layers 1 and two piezoelectric films 2 may be provided, the graphene layer 1 may be made of multi-layer graphene, the thickness of the graphene layer 1 may be set between 20 and 50 micrometers, similarly, the thickness of the first adhesive layer 3 may be set between 20 and 50 micrometers, and the thickness of the second adhesive layer 4 may be set between 20 and 50 micrometers; the thickness of the piezoelectric film 2 may also be set between 20-50 microns.
The graphene has good mechanical properties and can be bent. And the Young modulus of the graphene is 1.0TPa, and the inherent tensile strength can reach 130 GPa. In addition, the reduced graphene modified by hydrogen ions also has very good strength. By utilizing the mechanical characteristics of the graphene, the stability and toughness of the structure can be effectively enhanced, and the service life is prolonged.
The directional sound production mainly utilizes the piezoelectric film 2 to generate vibration under the action of an alternating electric field, and the longitudinal vibration vertical to the ground surface of the piezoelectric film can be used for generating and receiving ultrasonic waves. An alternating electric field is used for modulating an ultrasonic frequency signal, the graphene electrodes are switched on, longitudinal vibration of charges in the piezoelectric film 2 is caused through the change of the electric field between the graphene electrodes, ultrasonic waves are sent to the air, and audible audio carried on the ultrasonic waves is transmitted along a specified direction through air self-demodulation.
Two or more layers of piezoelectric films 2 are stacked, and when the charges in the piezoelectric films 2 vibrate, the charges in the other piezoelectric film 2 in the same longitudinal position can form resonance, so that the intensity of a signal is enhanced, the transmission distance of a directional audio signal is further enhanced, and the quality of an audible audio frequency after demodulation is enhanced.
To sum up, the flexible membrane applied to directional sound production of the utility model has the advantages that the electrode is made through the graphene layer, and the characteristic of low resistivity of graphene is utilized, so that the energy loss can be reduced, and the signal transmission precision is enhanced; the adhesive layer is used for bonding, so that the stability of the membrane structure can be improved, and the toughness and the durability of the membrane structure are enhanced; the flexible membrane structure is made of the multilayer piezoelectric membrane, so that the strength of signals can be effectively enhanced, and directional audio transmission is facilitated. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A flexible membrane for use in directional sound production, comprising:
the graphene layer is compounded on two sides of the planar substrate;
wherein, the planar substrate is obtained by compounding at least two piezoelectric films.
2. The flexible film for directional sound production according to claim 1, wherein the piezoelectric film comprises at least one of: polyvinylidene fluoride, zinc oxide piezoelectric film.
3. The flexible film for directional sound production according to claim 1, wherein a first adhesive layer is disposed between the piezoelectric films, and the two piezoelectric films are combined by bonding the first adhesive layer.
4. The flexible film applied to directional sound production according to claim 3, wherein the first adhesive layer is a light-transmitting adhesive layer.
5. The flexible membrane applied to directional sound production according to claim 1, wherein a second adhesive layer is disposed between the graphene layer and the planar substrate, and the graphene layer and the planar substrate are compounded through the second adhesive layer.
6. The flexible film for directional sound production according to claim 5, wherein the second adhesive layer is a light-transmitting adhesive layer.
7. The flexible membrane applied to directional sound production according to claim 1, wherein the graphene layer is made of multi-layer graphene, and the thickness of the graphene layer is 20-50 microns.
8. The flexible film for directional sound production according to claim 3, wherein the first adhesive layer has a thickness of 20-50 μm.
9. The flexible film for directional sound production according to claim 5, wherein the thickness of the second adhesive layer is 20-50 μm.
10. The flexible membrane for directional sound production according to claim 1, wherein the piezoelectric membrane has a thickness of 20-50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762963.XU CN210868154U (en) | 2019-10-21 | 2019-10-21 | Flexible film applied to directional sound production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762963.XU CN210868154U (en) | 2019-10-21 | 2019-10-21 | Flexible film applied to directional sound production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210868154U true CN210868154U (en) | 2020-06-26 |
Family
ID=71286801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921762963.XU Active CN210868154U (en) | 2019-10-21 | 2019-10-21 | Flexible film applied to directional sound production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210868154U (en) |
-
2019
- 2019-10-21 CN CN201921762963.XU patent/CN210868154U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6196400B2 (en) | Electroacoustic conversion film | |
| US9185495B2 (en) | Oscillation device and electronic apparatus | |
| KR101656722B1 (en) | Acoustic generator | |
| KR101628584B1 (en) | Electroacoustic converter film, flexible display, vocal cord microphone, and musical instrument sensor | |
| TWI381747B (en) | Micro-speaker device and method of manufacturing the same | |
| US8891333B2 (en) | Oscillator and electronic device | |
| JP4611381B2 (en) | Card type device | |
| JP7137690B2 (en) | Piezoelectric Films, Laminated Piezoelectric Elements and Electroacoustic Transducers | |
| US20230096425A1 (en) | Piezoelectric element and piezoelectric speaker | |
| JP7390390B2 (en) | Piezoelectric film and piezoelectric film manufacturing method | |
| US20220115579A1 (en) | Piezoelectric film | |
| JP7245905B2 (en) | Polymer composite piezoelectric material, Piezoelectric film, Piezoelectric speaker, Flexible display | |
| JP7350102B2 (en) | piezoelectric film | |
| JP2012209866A (en) | Acoustic generator | |
| WO2016017632A1 (en) | Electroacoustic conversion film and electroacoustic converter | |
| US11930714B2 (en) | Piezoelectric film | |
| CN210868154U (en) | Flexible film applied to directional sound production | |
| CN103262575A (en) | Oscillator device and electronic instrument | |
| WO2016136522A1 (en) | Structure body and electro-acoustic converter | |
| KR101386008B1 (en) | Transducer for speaker and method for manufacturing the same | |
| JP7217807B2 (en) | piezoelectric film | |
| KR20110128968A (en) | Transparent and directivity-allowed speaker made with cellulose piezo-paper | |
| CN201608894U (en) | Multilayer piezoelectric speaker adopting non-metallic vibrating diaphragm | |
| KR101116572B1 (en) | Micro speaker made with cellulose Piezo-paper | |
| CN201150129Y (en) | Multilayer piezoelectric loudspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220819 Address after: Room 6-39, 6th Floor, Building 6, Phase 3, R&D Building, Building 2, No. 36, Xiyong Avenue, High-tech Zone, Shapingba District, Chongqing 401332 Patentee after: CHONGQING QINGWEN TECHNOLOGY Co.,Ltd. Address before: Room b210, standard workshop auxiliary room, Jinyang science and Technology Industrial Park, Guiyang National High tech Industrial Development Zone, Guiyang City, Guizhou Province Patentee before: Guiyang qingwenyun Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |