CN106162450B - Vibrating diaphragm and preparation method thereof - Google Patents

Vibrating diaphragm and preparation method thereof Download PDF

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Publication number
CN106162450B
CN106162450B CN201610628763.XA CN201610628763A CN106162450B CN 106162450 B CN106162450 B CN 106162450B CN 201610628763 A CN201610628763 A CN 201610628763A CN 106162450 B CN106162450 B CN 106162450B
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mixture
glue
film
graphene
graphite powder
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CN106162450A (en
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何朝阳
易鹏飞
孟献振
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Shaanxi Amuqi Intelligent Electroacoustic Technology Co.,Ltd.
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Changzhou Amt Co ltd
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Priority to PCT/CN2016/096777 priority patent/WO2018023842A1/en
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    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/025—Diaphragms comprising polymeric materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

The invention relates to a vibrating diaphragm and a preparation method thereof, wherein the vibrating diaphragm comprises a base layer which is a film made of any one material of polyetherimide, polyethylene glycol terephthalate, polyether-ether-ketone, polyphenylene sulfide and polyurethane; the reinforcing layer is formed by drying and curing a mixture formed by mixing graphene, graphite powder and glue, and the weight ratio of the graphite powder to the glue in the reinforcing layer is (1-2) to (5-10) to (9994-9988); the strengthening layer is adhered to the surface of the base layer. The preparation method comprises the following steps: firstly, providing a film, glue, graphite powder and graphene, uniformly mixing the graphite powder and the graphene to form a first mixture, and mixing the first mixture into the glue to form a second mixture; and then uniformly coating the second mixture on the surface of the film and drying the film to cure the second mixture on the surface of the film to obtain the final diaphragm. The vibrating diaphragm of the invention has high adhesiveness and reduces the resonant frequency f0The high-frequency sound pressure is increased, and the high-frequency and low-frequency characteristics are improved.

Description

Vibrating diaphragm and preparation method thereof
Technical Field
The invention relates to the technical field of acoustic diaphragms, in particular to a diaphragm and a preparation method thereof.
Background
With the rapid development of scientific technology, people have higher and higher requirements on the quality of electronic products, such as higher and higher requirements on the sound quality of products such as earphones and sound equipment, such as miniaturization, thinness, high sound quality and the like, and the effects depend on the core component of an acoustic device, namely the diaphragm of the acoustic device.
In the related art, in order to obtain a high-quality diaphragm, the material of the diaphragm is usually changed. Common vibrating diaphragm materials include cone paper, plastics, metal and the like, and the tone quality characteristic of the cone paper vibrating diaphragm is smooth and natural, clear and clear, but the cone paper vibrating diaphragm is easily influenced by the environment and has unstable performance. The metal diaphragm has strong rigidity, but the other side with strong rigidity has low internal loss, and energy can not be absorbed by the diaphragm material, so that when the basin is split, a very obvious resonance peak appears at the high end of frequency response, and metal sound easily appears. In addition, the metal material can increase the weight of the diaphragm, which is not favorable for the thinning and lightening development of the diaphragm. The vibrating diaphragm rigidity of plastics material is not too good, and the quality is also relatively poor, and adopts the vibrating diaphragm that has graphite alkene, can improve the rigidity of vibrating diaphragm, but current graphite alkene vibrating diaphragm adopts the mode of spraying to form in the substrate surface usually, because the rigidity characteristic of graphite alkene for the diaphragm is when receiving external force, easy fracture, thereby drops, high low frequency performance is not good enough from the surface of substrate easily.
Disclosure of Invention
The invention aims to solve the technical problems that graphene is easy to break and fall off from the surface of a base material when an external force is applied to a diaphragm in the prior art, and the high-frequency and low-frequency performance is not good enough.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a diaphragm comprising:
the base layer is a film made of any one of materials of polyetherimide, polyethylene terephthalate, polyether ether ketone, polyphenylene sulfide and polyurethane;
the strengthening layer is a mixture formed by mixing graphene, graphite powder and glue and is formed by drying and curing, wherein,
the weight ratio of the graphite powder to the graphene to the glue in the strengthening layer is (1-2) to (5-10) to (9994-9988);
the strengthening layer is adhered to the surface of the base layer.
In the diaphragm, the thickness of the diaphragm reinforcing layer is preferably 2 μm.
A preparation method of the diaphragm comprises the following steps:
s1: providing a film, glue, graphite powder and graphene;
s2: uniformly mixing the graphite powder and the graphene to form a first mixture, adding the first mixture into the glue water, mixing and uniformly stirring to form a second mixture;
s3: and uniformly coating the second mixture on the surface of the film, and drying to solidify the second mixture on the surface of the film to obtain the final diaphragm.
In the preparation method of the diaphragm, preferably, before the step S3, the surface of the film is pretreated, where the pretreatment is to clean the surface of the film.
In the preparation method of the diaphragm, the weight ratio of the graphite powder, the graphene and the glue in the second mixture is preferably (1-2): (5-10): 9994-9988.
In the preparation method of the diaphragm, the thickness of the second mixture coated on the film is preferably 2 μm.
In the preparation method of the diaphragm, the film is preferably made of any one of polyetherimide, polyethylene terephthalate, polyether ether ketone, polyphenylene sulfide and polyurethane.
In the preparation method of the diaphragm, the glue is preferably any one of polyurethane, vinyl fluoride, polyacrylate emulsion, vinyl acetate and ethylene-vinyl acetate.
In the preparation method of the diaphragm, preferably, in step S2, the second mixture is uniformly coated on the surface of the film in a slit coating manner.
In the preparation method of the diaphragm, preferably, in the step S2, the second mixture is uniformly coated on the surface of the film by a mesh coating method.
The diaphragm of the invention has the following beneficial effects: the vibrating diaphragm comprises a base layer and a strengthening layer, wherein the strengthening layer is coated on the surface of the base layer, the base layer is a thin film made of any one of materials including polyetherimide, polyethylene glycol terephthalate, polyether ether ketone, polyphenylene sulfide and polyurethane, the strengthening layer is a strengthening layer formed by mixing and drying and curing graphene, graphite powder and glue, and the weight ratio of the graphite powder to the graphene to the glue in the strengthening layer is (1-2) to (5-10) to (9994-9988). The graphite powder, graphite alkene and glue after intensive mixing of adoption scribble the basal layer surface again, can make graphite alkene homogeneous cure in the colloid, can be with the help of the adhesive force adhesion of colloid at the basal layer surface, the adhesion of graphite alkene makes graphite alkene be difficult for the fracture, is difficult to drop from the basal layer surface to when having realized improving vibrating diaphragm high frequency characteristic and can having taken into account its low frequency performance, still can effectively improve adhesion, the reliability of graphite alkene, the stability of improvement vibrating diaphragm.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic cross-sectional view of a diaphragm according to an embodiment of the present invention;
FIG. 2 is a frequency response curve diagram of a diaphragm according to an embodiment of the present invention and a conventional diaphragm;
fig. 3 is an impedance curve diagram of a loudspeaker assembled by a diaphragm and a common diaphragm according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a diaphragm, which includes a base layer 101, and a reinforcing layer 102 attached to a surface of the base layer 101. The base layer 101 is a film made of any one of polyetherimide, polyethylene terephthalate, polyether ether ketone, polyphenylene sulfide, and polyurethane. Preferably, the base layer 101 is a film made of polyethylene terephthalate, i.e. preferably a PET (polyethylene terephthalate) film, as a base material of the diaphragm.
The strengthening layer 102 is formed by drying and curing a mixture formed by uniformly mixing graphene, graphite powder and glue.
In the strengthening layer 102, glue is used for dispersing graphene; in the invention, the glue is applicable to any glue for dispersing graphene, and is not limited, and the glue can be any one of polyurethane, vinyl fluoride, polyacrylate emulsion, vinyl acetate and ethylene-vinyl acetate. Polyurethane is preferred.
In the invention, the graphite powder, the graphene and the glue can be mixed according to different proportions, and the weight ratio of the graphite powder to the graphene to the glue is preferably (1-2) to (5-10) to (9994-9988).
It can be understood that, in the present invention, the graphite powder is added to the strengthened layer 102, because the graphite powder has a relatively good heat dissipation performance, and the diaphragm can generate a high amount of heat during vibration, the addition of the graphite powder can help the diaphragm to dissipate heat, and when the diaphragm is applied to an acoustic device such as a speaker, the bearing capacity of the speaker can be improved. The graphene has the characteristic of single atom rigidity, so that the graphene has strong rigidity and good overall performance, and the characteristic of the vibrating diaphragm can be changed by adding the graphene into the strengthening layer 102, so that the vibrating diaphragm can achieve the high-frequency performance of metal plating, and simultaneously can achieve better low-frequency performance, thereby improving the overall effect of the vibrating diaphragm. Preferably, the thickness of the strengthening layer 102 is 1.5 to 3.5 μm, more preferably 2 μm.
In addition, the vibrating diaphragm provided by the invention has the advantages of good rigidity, high adhesion and better high-low frequency performance, and can be suitable for acoustic equipment such as a loudspeaker, a receiver and the like.
The invention provides a preparation method of a vibrating diaphragm, which comprises the following steps:
s1: a film, glue, graphite powder and graphene are provided.
In step S1, the film is made of any one of polyetherimide, polyethylene terephthalate, polyetheretherketone, polyphenylene sulfide, and polyurethane. Polyethylene terephthalate (PET) is preferred.
The glue is any one of polyurethane, vinyl fluoride, polyacrylate emulsion, vinyl acetate and ethylene-vinyl acetate, and preferably polyurethane.
S2: the preparation method comprises the steps of uniformly mixing graphite powder and graphene to form a first mixture, adding the first mixture into glue water, mixing and uniformly stirring to form a second mixture. It can be understood that the graphite powder, the graphene and the glue can be mixed according to different proportions, and the proportion that the graphite powder and the graphene can be completely dispersed in the glue is suitable for the invention, but the invention is not limited to this, and the weight ratio of the graphite powder, the graphene and the glue is preferably (1-2): (5-10): 9994-9988).
S3: and uniformly coating the second mixture on the surface of the film, and drying to solidify the second mixture on the surface of the film to obtain the final diaphragm. Preferably, before step S3, the surface of the film is pretreated, that is, before the second mixture is uniformly coated on the surface of the film, the surface of the film needs to be cleaned, for example, to remove impurities such as dust on the surface of the film, so as to enhance the adhesion of the surface of the film. Further, the thickness of the second mixture coated on the surface of the film is 1.5-3.5 μm, and preferably 2 μm.
The second mixture is coated on the surface of the film by a slit coating method or a cross-hatch coating method, and the specific coating parameters can be determined according to the actual coating conditions, which is not limited in the present invention.
In the embodiment of the invention, the second mixture formed by uniformly mixing the graphite powder, the graphene and the glue is uniformly coated on the surface of the film in a slit coating or reticulate coating mode, so that the graphene and the graphite powder are more firmly adhered to the surface of the film by virtue of the adhesive force of the glue. Because graphite powder, graphite alkene even solidification are in glue and the adhesion is on the film surface to make the vibrating diaphragm that forms have better homogeneity, uniformity, be difficult for producing and split the vibration, the vibrating diaphragm intensity that adopts this preparation method to make simultaneously is high, and the rigidity is strong, and high and low frequency performance is better, has effectively improved the acoustic effect of vibrating diaphragm.
The preparation of graphite powder, graphene and glue mixed is illustrated by the following examples:
example 1
A. Graphite powder, graphene and glue are mixed, 1g of graphite powder, 5g of graphene and 9994g of glue are taken, 1g of graphite powder and 5g of graphene are uniformly mixed respectively, and the powder obtained by mixing the graphite powder and the graphene is doped into the 9994g of glue and stirred, so that the graphite powder and the graphene are uniformly distributed in the glue.
B. After the graphite powder and the graphene are uniformly distributed on the glue, coating a mixture formed by the graphite powder, the graphene and the glue on the surface of the film, and drying the film coated with the mixture of the graphite powder, the graphene and the glue to enable the colloid to be solidified and adhered on the surface of the film.
Example 2
A. Graphite powder, graphene and glue are mixed, 1.5g of graphite powder, 7.5g of graphene and 9991g of glue are taken, 1.5g of graphite powder and 7.5g of graphene are respectively and uniformly mixed, and the mixed powder of the graphite powder and the graphene is doped into 9991g of glue and stirred, so that the graphite powder and the graphene are uniformly distributed in the glue.
B. After the graphite powder and the graphene are uniformly distributed on the glue, coating a mixture formed by the graphite powder, the graphene and the glue on the surface of the film, and drying the film coated with the mixture of the graphite powder, the graphene and the glue to enable the colloid to be solidified and adhered on the surface of the film.
Example 3
A. Graphite powder, graphene and glue are mixed, 2g of graphite powder, 10g of graphene and 9988g of glue are taken, 2g of graphite powder and 10g of graphene are uniformly mixed respectively, and the powder obtained by mixing the graphite powder and the graphene is doped into 9988g of glue and stirred, so that the graphite powder and the graphene are uniformly distributed in the glue.
B. After the graphite powder and the graphene are uniformly distributed on the glue, coating a mixture formed by the graphite powder, the graphene and the glue on the surface of the film, and drying the film coated with the mixture of the graphite powder, the graphene and the glue to enable the colloid to be solidified and adhered on the surface of the film.
The following performance tests were performed by comparing the conventional loudspeaker assembled with a diaphragm with the loudspeaker assembled with a diaphragm of the present invention:
high-low frequency performance test of vibrating diaphragm
The frequency response of the diaphragm manufactured in embodiments 1 to 3 in the vibration process is evaluated to reflect the high and low frequency performance of the diaphragm. The evaluation method comprises the following steps: the prepared diaphragm is formed into a loudspeaker diaphragm, and a finished product (called as a graphite powder-graphene loudspeaker, and the same is used hereinafter) is assembled, and the acoustic performance test is carried out on the diaphragm and a common loudspeaker, wherein the specific test method is that a standard acoustic performance tester is adopted to simultaneously test the graphite powder-graphene loudspeaker and the common loudspeaker, the test time is 10 minutes, corresponding data recording is carried out, and the frequency response curve is shown in fig. 2.
According to the recorded data and the frequency response curve chart (fig. 2), the high-frequency response curve of the graphene loudspeaker is 2-4 dB higher than that of a common loudspeaker (the high frequency range is 3000-40000 Hz), and the low-frequency response curve of the graphene loudspeaker is 3-6 dB higher than that of the common loudspeaker (the low frequency range is 20-50 Hz).
As shown in fig. 3, which is a graph of impedance curve of a loudspeaker assembled by a diaphragm of the present invention and a common diaphragm, it can be directly seen from the graph: low-frequency resonant frequency f of graphite powder-graphene horn0Is about 150Hz lower than that of the common horn.
The experimental results directly illustrate that the vibrating diaphragm has better high-low frequency performance and strong rigidity, and the graphite powder and the graphene are directly and uniformly mixed into the glue, so that the vibrating diaphragm has higher adhesion and is not easy to fall off.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (6)

1. A diaphragm, comprising:
the base layer is a film made of any one of materials of polyetherimide, polyethylene terephthalate, polyether ether ketone, polyphenylene sulfide and polyurethane;
the strengthening layer is a mixture formed by mixing graphene, graphite powder and glue and is formed by drying and curing, wherein,
the weight ratio of the graphite powder to the graphene to the glue in the strengthening layer is (1-2) to (5-10) to (9994-9988);
the strengthening layer is adhered to the surface of the base layer; the thickness of the diaphragm strengthening layer is 2 mu m.
2. A preparation method of a diaphragm is characterized by comprising the following steps:
s1: providing a film, glue, graphite powder and graphene;
s2: uniformly mixing the graphite powder and the graphene to form a first mixture, adding the first mixture into the glue water, mixing and uniformly stirring to form a second mixture; the weight ratio of the graphite powder to the graphene to the glue in the second mixture is (1-2) to (5-10) to (9994-9988);
s3: uniformly coating the second mixture on the surface of the film and drying the second mixture to enable the second mixture to be solidified on the surface of the film, so as to obtain a final diaphragm; the second mixture is coated on the film to a thickness of 2 μm; the film is made of any one of polyetherimide, polyethylene terephthalate, polyether-ether-ketone, polyphenylene sulfide and polyurethane.
3. The method of manufacturing a diaphragm according to claim 2, wherein before step S3, the surface of the thin film is pretreated, and the pretreatment is to clean the surface of the thin film.
4. The method for manufacturing a diaphragm according to claim 2, wherein the glue is any one of polyurethane, vinyl fluoride, polyacrylate emulsion, vinyl acetate, and ethylene-vinyl acetate.
5. The method of claim 2, wherein the step S3 is performed by uniformly coating the second mixture on the surface of the film in a slit coating manner.
6. The method of claim 2, wherein in step S3, the second mixture is uniformly coated on the surface of the membrane by a screen coating method.
CN201610628763.XA 2016-08-02 2016-08-02 Vibrating diaphragm and preparation method thereof Active CN106162450B (en)

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PCT/CN2016/096777 WO2018023842A1 (en) 2016-08-02 2016-08-25 Vibration diaphragm and manufacturing method thereof, and electroacoustic transducer

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CN106957466B (en) * 2016-12-12 2019-05-31 瑞声科技(新加坡)有限公司 Vibrating diaphragm and preparation method thereof for electroacoustics system
WO2019036900A1 (en) * 2017-08-22 2019-02-28 周金进 Method for coating membrane on surface of speaker diaphragm
CN108574924B (en) * 2018-05-03 2021-04-20 深圳市摩码克来沃化学科技有限公司 Composite vibrating diaphragm, preparation method of composite vibrating diaphragm and acoustic generator with composite vibrating diaphragm
CN111848994B (en) * 2019-04-24 2022-04-05 歌尔股份有限公司 Miniature sound generating device
CN110818991A (en) * 2019-10-31 2020-02-21 歌尔股份有限公司 Sound generating device's vibrating diaphragm and sound generating device
CN111647282B (en) * 2020-04-22 2022-04-26 深圳市信维通信股份有限公司 Vibrating diaphragm material and preparation method and application thereof
CN114075372A (en) * 2020-08-20 2022-02-22 光宇材料股份有限公司 Single-layer acoustic diaphragm and manufacturing method thereof

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US20150195654A1 (en) * 2014-01-09 2015-07-09 Merry Electronics (Suzhou) Co., Ltd. Manufacturing method and usage of vebration membrane
CN103929708A (en) * 2014-04-25 2014-07-16 瑞声光电科技(常州)有限公司 Preparation method of composite vibrating diaphragm
CN103916801A (en) * 2014-04-25 2014-07-09 瑞声光电科技(常州)有限公司 Composite vibrating diaphragm and manufacturing method thereof
CN204104134U (en) * 2014-05-28 2015-01-14 福建省辉锐材料科技有限公司 A kind of piezo-electric loudspeaker vibrating diaphragm
CN105323697A (en) * 2014-07-28 2016-02-10 美特科技(苏州)有限公司 Manufacture method of composite vibrating diaphragm and vibrating diaphragm manufactured by method
CN104320741B (en) * 2014-10-22 2018-11-02 李亚宁 Audio devices with graphene compound voice diaphragm
CN204810540U (en) * 2015-07-10 2015-11-25 瑞声光电科技(常州)有限公司 Miniature loudspeaker diaphragm
CN204810529U (en) * 2015-07-10 2015-11-25 瑞声光电科技(常州)有限公司 Miniature loudspeaker diaphragm
CN105792077A (en) * 2016-03-04 2016-07-20 歌尔声学股份有限公司 Loudspeaker diaphragm, manufacturing method thereof and moving coil type loudspeaker

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