CN112399309B - Loudspeaker diaphragm and loudspeaker - Google Patents
Loudspeaker diaphragm and loudspeaker Download PDFInfo
- Publication number
- CN112399309B CN112399309B CN202011200433.3A CN202011200433A CN112399309B CN 112399309 B CN112399309 B CN 112399309B CN 202011200433 A CN202011200433 A CN 202011200433A CN 112399309 B CN112399309 B CN 112399309B
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- diaphragm
- loudspeaker
- polyaryletherketone
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- loudspeaker diaphragm
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- 229920006260 polyaryletherketone Polymers 0.000 claims abstract description 60
- 238000005187 foaming Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 20
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 13
- 229920002530 polyetherether ketone Polymers 0.000 claims description 13
- 229920001652 poly(etherketoneketone) Polymers 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 5
- 229920008285 Poly(ether ketone) PEK Polymers 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 description 18
- 210000004027 cell Anatomy 0.000 description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 239000006260 foam Substances 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000004088 foaming agent Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 229920006351 engineering plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920001643 poly(ether ketone) Polymers 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 125000000468 ketone group Chemical group 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 ether ketone Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002832 nitroso derivatives Chemical class 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920000090 poly(aryl ether) Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention provides a loudspeaker diaphragm and a loudspeaker, wherein the loudspeaker diaphragm comprises a diaphragm body and a vibrating plate, the loudspeaker diaphragm is made of foaming polyaryletherketone, and the loudspeaker diaphragm is made of the foaming polyaryletherketone, so that the loudspeaker provided with the loudspeaker diaphragm has better medium-frequency and high-frequency response performance.
Description
Technical Field
The invention relates to the technical field of acoustoelectric products, in particular to a loudspeaker diaphragm and a loudspeaker.
Background
The micro-speaker is an important acoustic component in portable electronic equipment, is mainly used for completing conversion between an electric signal and a sound signal, and is an energy conversion device.
The vibrating plate in the current loudspeaker vibrating diaphragm is mainly made of engineering plastics and metal foil. However, these materials are relatively dense, which results in poor performance at medium and high frequencies of the speaker.
Disclosure of Invention
The invention provides a loudspeaker diaphragm and a loudspeaker, and aims to improve the medium-frequency and high-frequency performance of the loudspeaker.
In order to achieve the above object, the present invention provides a loudspeaker diaphragm, which includes a diaphragm body and a vibrating plate, wherein the loudspeaker diaphragm is made of a material including expanded polyaryletherketone;
the density of the foamed polyaryletherketone is 0.2-0.9g/cm 3.
Optionally, the polyaryletherketone comprises Polyetheretherketone (PEEK), Polyetherketone (PEK), Polyetherketoneketone (PEKK), Polyetheretherketoneketone (PEEKK), or Polyetherketoneetherketoneketone (PEKEKK).
Optionally, the vibrating plate in the loudspeaker vibrating diaphragm is made of the foamed polyaryletherketone, and the vibrating diaphragm body and the vibrating plate are formed in a bonding mode or integrally formed in a hot press mode.
Optionally, the process for manufacturing the vibrating plate or the loudspeaker vibrating diaphragm by using the foamed polyaryletherketone comprises air pressure forming, compression molding and die cutting.
Optionally, the diaphragm body includes a central portion, a folded ring portion, and an edge portion that are connected in sequence;
the diaphragm is of a flat plate structure and/or a convex hull structure, and the diaphragm is coupled to the center portion.
Optionally, the foamed polyaryletherketone has a thickness of 0.02mm to 1 mm.
Optionally, the foamed polyaryletherketone has a tensile modulus of from 0.3GPa to 6 GPa.
Optionally, the foamed polyaryletherketone has a cell state of closed cells or semi-closed cells, and the diameter of the cells is 1 μm to 100 μm.
Optionally, the foaming process of the foamed polyaryletherketone is a physical foaming process or a chemical foaming process.
In addition, in order to achieve the above object, the present invention also provides a speaker including the speaker diaphragm as described above.
Compared with the prior art, the loudspeaker diaphragm and the loudspeaker provided by the invention have the advantages that the loudspeaker diaphragm comprises the diaphragm body and the diaphragm, the loudspeaker diaphragm is made of the foamed polyaryletherketone, the density of the foamed polyaryletherketone is 0.2-0.9g/cm3, and the loudspeaker diaphragm is made based on the foamed polyaryletherketone, so that the loudspeaker provided with the loudspeaker diaphragm has better medium-frequency and high-frequency response performance.
Drawings
Fig. 1 is a schematic view of a first structure of a loudspeaker diaphragm according to an embodiment of the present invention;
fig. 2 is a schematic view of a second structure of a loudspeaker diaphragm according to an embodiment of the present invention;
fig. 3 is a frequency response curve according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name(s) |
| 1 | Vibrating plate | 2 | |
| 21 | |
22 | Folded |
| 23 | Edge part |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment relates to a loudspeaker diaphragm, which is characterized in that the loudspeaker diaphragm comprises a diaphragm body and the diaphragm, the loudspeaker diaphragm is made of foamed polyaryletherketone, and the density of the polyaryletherketone is 0.07g/cm 3 -1.3g/cm 3 。
The polyaryletherketone includes Polyetheretherketone (PEEK), Polyetherketone (PEK), Polyetherketoneketone (PEKK), Polyetheretherketoneketone (PEEKK), or Polyetherketoneetherketoneketone (PEKEKK).
Among them, Polyetheretherketone (PEEK) is a high polymer composed of a repeating unit containing one ketone bond and two ether bonds in a main chain structure, has a crystallinity of up to 48%, belongs to a crystalline high polymer, has a melting point of more than 300 ℃, has excellent heat resistance and dimensional stability, and also has high elastic modulus, tensile strength, and the like.
Polyether ketone (PEK) is a high-molecular polymer with a main chain formed by alternating ether bonds and ketone bonds, and has the advantages of mild polyether ketone synthesis conditions, heat stability and mechanical strength slightly lower than that of PEEK. .
Polyether ketone (PEKK) is a high polymer consisting of repeating units containing two ketone bonds and one ether bond in a main chain structure, the glass transition temperature is 10-20 ℃ higher than that of PEEK, and the elastic modulus is 0.7 Gpa.
A high molecular polymer containing two ether bonds and two ketone groups in a repeating unit of a Polyetheretherketone (PEEKK) main chain structure. The PEEKK has higher heat resistance on the basis of keeping the excellent performance of PEEK.
Polyether ketone ether ketone (PEKEKK) belongs to an important variety in polyarylether copper plastics, and is based on a novel high-temperature resistant polymer polyarylether ketone. Because of good molecular chain regularity, high crystallinity, high melting temperature and good temperature resistance.
The foaming process of the foamed polyaryletherketone is a physical foaming process or a chemical foaming process.
The physical foaming process is to foam the polyaryletherketone by a physical method, and there are generally three methods: (1) firstly, inert gas is dissolved in polyaryletherketone melt or paste under pressure, and then the gas is released through decompression, so that air holes are formed in polyaryletherketone for foaming; (2) foaming by evaporating the low boiling point liquid dissolved in the polyaryletherketone melt to vaporize it; (3) adding hollow spheres into the polyaryletherketone to foam to form the foamed polyaryletherketone. The physical foaming agent used in the physical foaming process has relatively low cost, particularly low cost of carbon dioxide and nitrogen, flame retardance and no pollution, so the application value is high; and the physical foaming agent has no residue after foaming, and has little influence on the performance of the foamed plastic.
The chemical foaming process is to foam the polyaryletherketone by using a chemical method to generate gas: heating the chemical foaming agent added into the polyaryletherketone to decompose and release gas for foaming; wherein the foaming agent comprises carbonate, azo compounds, nitroso compounds and hydrazide compounds. In addition, the gas released by mutual chemical reaction between the polyaryletherketone components can be used for foaming. The foaming process of chemical foaming or physical foaming is generally to form bubble nuclei, expand the bubble nuclei and solidify and shape the bubble body.
The density of the foamed polyaryletherketone is 0.2g/cm 3 -0.9g/cm 3 (ii) a If the density of the foamed polyaryletherketone is too high, the quality of the loudspeaker diaphragm is too high, the density is too low, and the rigidity of the material is insufficient, so that the loudspeaker diaphragm is not beneficial to vibrating. The value range of the density of the foamed polyaryletherketone can improve the sensitivity of a loudspeaker diaphragm.
The thickness of the foamed polyaryletherketone is 0.02mm-1mm, and the preferable thickness is 0.02mm-0.3 mm; it is understood that too large a thickness of the expanded polyaryletherketone may result in a large thickness of the diaphragm, and thus the thickness of the speaker diaphragm on which the speaker diaphragm is mounted may also be increased, which may result in a reduction in the vibration space of a speaker using the diaphragm. If the thickness of the expanded polyaryletherketone is too thin, the overall strength is insufficient, and the phenomena such as film rupture and fracture are easily caused.
The tensile modulus of the foamed polyaryletherketone is 0.3GPa-6GPa, and the preferable tensile modulus is 0.5GPa-4 GPa. Wherein the Tensile Modulus (Tensile Modulus) refers to the elasticity of the material when stretched. The value is the ratio of the force required to stretch a material per unit length in the direction of the central axis to its cross-sectional area. The value range of the tensile modulus of the foamed polyaryletherketone ensures that the loudspeaker diaphragm has better elasticity.
The foamed polyaryletherketone has a closed cell state or a semi-closed cell state, the diameter of the cells is 1-100 μm, and the closed cell state is a better state. Almost all the cells in the foaming liquid crystal polymer material in a closed cell state are surrounded by complete cell walls, and the cells are not communicated with each other. The loudspeaker diaphragm made of the foaming liquid crystal polymer material in the closed-cell state has a good vibration effect.
The foamed polyaryletherketone provided by the embodiment has the advantages of small density and large specific modulus, and a loudspeaker adopting the material has higher sensitivity. Compared with common engineering plastics, the aromatic ring and the ketone group in the molecular chain of the polyaryletherketone enable the molecular chain to have higher rigidity and intermolecular force, and the material shows excellent mechanical properties such as strength, modulus and the like and has excellent temperature resistance. The ether bond in the polyaryletherketone ensures that the polyaryletherketone has certain toughness while having high strength. The foaming polyaryletherketone material has the excellent performances of high modulus, high strength, high temperature resistance and the like. Through the adjustment of the thickness and the density of the material, the loudspeaker can obtain excellent medium-high frequency performance.
The loudspeaker diaphragm comprises a diaphragm body and the diaphragm, and the loudspeaker diaphragm is made of the foamed polyaryletherketone. Optionally, a material of a vibration plate in the loudspeaker vibration diaphragm is expanded polyaryletherketone, and the vibration plate and the vibration diaphragm are integrally formed by hot press molding or bonding.
In this embodiment, the diaphragm or the speaker diaphragm is made of the foamed polyaryletherketone by processes of air pressure forming, hot press forming and die cutting. The pressure forming and compression molding are carried out by taking thermoplastic material as raw material, heating sheet material with certain size and fixed shape to softening state, pressing the sheet material to the surface of a mold by external pressure, and finally obtaining the product with the same shape as the specified shape. The pressure of the air pressure forming is controllable, so that the foam holes are not mechanically compressed, and the air pressure forming process can be selected for keeping the shape and the material thickness of the foam holes. Die cutting is the direct cutting of the expanded polyaryletherketone into the specified shape. The specified shape includes a convex hull and a flat plate. The longitudinal section of the convex hull can be arc-shaped, and can also be inverted trapezoid, triangle and the like. The height of the convex hull can also be specifically set as required.
In this embodiment, the vibrating plate has a convex hull structure and/or a flat plate structure. The total thickness of the diaphragm body is 0.05-0.5mm, and density of 0.1-5g/cm 3 In the meantime.
When the vibrating plate of the loudspeaker vibrating diaphragm adopts the foamed polyaryletherketone, the vibrating plate is bonded with the vibrating diaphragm body to form the loudspeaker vibrating diaphragm.
The vibrating diaphragm body is formed by compounding one or more materials of engineering plastics (such as PEEK, polyarylate PAR and the like), elastomer materials (such as thermoplastic polyurethane elastomer TPU, thermoplastic polyester elastomer TPEE, rubber and the like), adhesive films (such as acrylate adhesive, organic silicon adhesive and the like) and the like, and the thickness of the vibrating diaphragm body is 0.01mm-0.5 mm. The bonding manner between the vibrating plate and the vibrating plate body is shown in fig. 1-2, where fig. 1 is a first structural schematic diagram of a loudspeaker vibrating plate according to an embodiment of the present invention; as shown in fig. 1, the diaphragm body includes a central portion 21, a corrugated portion 22, and an edge portion 23, which are sequentially connected to each other by the diaphragm body 1, the diaphragm 1 is of a flat plate structure, and the diaphragm 1 is bonded to the central portion 21 of the diaphragm 2. Fig. 2 is a schematic view of a second structure of a loudspeaker diaphragm according to an embodiment of the present invention; as can be seen from fig. 2, the structure of the vibrating plate is a convex hull structure. In practice the configuration shown in fig. 2 is often chosen.
And the plastic can also be integrally hot-pressed and molded. And the vibrating diaphragm body and the vibrating plate are formed in a mould through integrated hot-press molding at the same time. The mode of integrative hot briquetting can practice thrift the cost, raise the efficiency, reduce the reliability risk of failing, can promote the uniformity of vibration board simultaneously.
The invention also provides a loudspeaker which comprises the loudspeaker diaphragm.
A large number of foam holes are formed in the loudspeaker diaphragm, the loudspeaker diaphragm is small in density and overall mass, and the loudspeaker can obtain high medium-frequency and high-frequency responses. Meanwhile, under the condition of certain mass, the thickness of the foamed polyaryletherketone material is larger, the overall damping of a loudspeaker diaphragm is higher, the vibration consistency is better, the high-frequency response is improved, the segmentation vibration is reduced, and the THD (Total Harmonic Distortion) is reduced.
The loudspeaker diaphragm made of the expanded polyaryletherketone provided by the invention and the loudspeaker diaphragm of the prior art are placed in a loudspeaker to carry out Frequency Response (FR) test, the Frequency Response test result is shown in figure 3, the solid line in figure 3 is the FR curve of the loudspeaker diaphragm made of the expanded polyaryletherketone, the dotted line in figure 3 is the FR curve of the loudspeaker diaphragm of the prior art, and as can be seen from figure 3, the loudspeaker diaphragm made of the expanded polyaryletherketone has better medium-Frequency and high-Frequency Response performance and higher sensitivity.
Compared with the prior art, the loudspeaker diaphragm and the loudspeaker provided by the invention have the advantages that the loudspeaker diaphragm comprises the diaphragm body and the diaphragm, the loudspeaker diaphragm is made of the expanded polyaryletherketone, and the loudspeaker mounted with the loudspeaker diaphragm has better medium-frequency and high-frequency response performance.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structures or flow transformations made by the present specification and drawings, or applied directly or indirectly to other related arts, are included in the scope of the present invention.
Claims (8)
1. A loudspeaker diaphragm is characterized by comprising a diaphragm body and a diaphragm, wherein the diaphragm is made of foamed polyaryletherketone, and the diaphragm body and the diaphragm are formed in a bonding mode or are integrally formed in a hot pressing mode;
the density of the foamed polyaryletherketone is 0.2-0.9g/cm 3 ；
The vibrating plate is of a flat plate structure and/or a convex hull structure, and the thickness of the foamed polyaryletherketone is 0.02mm-1 mm.
2. The loudspeaker diaphragm of claim 1 where the polyaryletherketone includes Polyetheretherketone (PEEK), Polyetherketone (PEK), Polyetherketoneketone (PEKK), Polyetheretherketoneketone (PEEKK), or Polyetherketoneetherketoneketone (PEKEKK).
3. The loudspeaker diaphragm of claim 1, wherein the process of making the foamed polyaryletherketone into the diaphragm or the loudspeaker diaphragm comprises air pressure forming, compression molding, and die cutting.
4. The loudspeaker diaphragm of claim 1, wherein the diaphragm body includes a central portion, a folded ring portion, and an edge portion connected in sequence;
the diaphragm is coupled to the center portion.
5. The loudspeaker diaphragm of claim 1 wherein the tensile modulus of the foamed polyaryletherketone is 0.3GPa to 6 GPa.
6. The loudspeaker diaphragm of claim 1, wherein the foamed polyaryletherketone has a cell state of a closed cell state or a semi-closed cell state, and the diameter of the cell is 1 μm to 100 μm.
7. The loudspeaker diaphragm of claim 1 where the foaming process for the foamed polyaryletherketone is a physical foaming process or a chemical foaming process.
8. A loudspeaker comprising the loudspeaker diaphragm as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011200433.3A CN112399309B (en) | 2020-10-30 | 2020-10-30 | Loudspeaker diaphragm and loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011200433.3A CN112399309B (en) | 2020-10-30 | 2020-10-30 | Loudspeaker diaphragm and loudspeaker |
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| Publication Number | Publication Date |
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| CN112399309A CN112399309A (en) | 2021-02-23 |
| CN112399309B true CN112399309B (en) | 2022-08-19 |
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| CN202011200433.3A Active CN112399309B (en) | 2020-10-30 | 2020-10-30 | Loudspeaker diaphragm and loudspeaker |
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| CN113473320B (en) * | 2021-07-16 | 2023-05-02 | 辽宁弗佰克高新材料有限公司 | Loudspeaker vibrating diaphragm and loudspeaker |
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| CN203219480U (en) * | 2013-05-06 | 2013-09-25 | 厦门东声电子有限公司 | Miniature loudspeaker diaphragm |
| CN107141686A (en) * | 2017-04-24 | 2017-09-08 | 温州市赢创新材料技术有限公司 | A kind of preparation method of polypropylene material |
| CN208891128U (en) * | 2017-09-01 | 2019-05-21 | 信越聚合物株式会社 | Electromagnetic wave shielding film and printed circuit board with electromagnetic wave shielding film |
| WO2020133365A1 (en) * | 2018-12-29 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Dome material, vibrating diaphragm and loudspeaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57106296A (en) * | 1980-12-23 | 1982-07-02 | Sanyo Electric Co Ltd | Acoustic material and the manufacturing method |
| JPS62281598A (en) * | 1986-05-30 | 1987-12-07 | Asahi Chem Ind Co Ltd | Diaphragm for speaker |
| EP1429582B1 (en) * | 2002-12-09 | 2013-01-16 | Onkyo Corporation | Loudspeaker diaphragm and method for manufacturing the same |
| JP2010171927A (en) * | 2008-12-22 | 2010-08-05 | Yoshiyasu Muto | Speaker diaphragm, and speaker employing the same |
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2020
- 2020-10-30 CN CN202011200433.3A patent/CN112399309B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203219480U (en) * | 2013-05-06 | 2013-09-25 | 厦门东声电子有限公司 | Miniature loudspeaker diaphragm |
| CN107141686A (en) * | 2017-04-24 | 2017-09-08 | 温州市赢创新材料技术有限公司 | A kind of preparation method of polypropylene material |
| CN208891128U (en) * | 2017-09-01 | 2019-05-21 | 信越聚合物株式会社 | Electromagnetic wave shielding film and printed circuit board with electromagnetic wave shielding film |
| WO2020133365A1 (en) * | 2018-12-29 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Dome material, vibrating diaphragm and loudspeaker |
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| CN112399309A (en) | 2021-02-23 |
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