CN114363775A - Vibrating diaphragm material and preparation process thereof - Google Patents
Vibrating diaphragm material and preparation process thereof Download PDFInfo
- Publication number
- CN114363775A CN114363775A CN202210027924.5A CN202210027924A CN114363775A CN 114363775 A CN114363775 A CN 114363775A CN 202210027924 A CN202210027924 A CN 202210027924A CN 114363775 A CN114363775 A CN 114363775A
- Authority
- CN
- China
- Prior art keywords
- parts
- vibrating diaphragm
- diaphragm
- antioxidant
- coating
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 239000003292 glue Substances 0.000 claims abstract description 18
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 15
- 239000000314 lubricant Substances 0.000 claims abstract description 15
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- 239000000758 substrate Substances 0.000 claims abstract description 13
- GZMAAYIALGURDQ-UHFFFAOYSA-N 2-(2-hexoxyethoxy)ethanol Chemical compound CCCCCCOCCOCCO GZMAAYIALGURDQ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 11
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 11
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims abstract description 11
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 11
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims abstract description 11
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N N-phenyl amine Natural products NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003365 glass fiber Substances 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 9
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004359 castor oil Substances 0.000 claims description 4
- 235000019438 castor oil Nutrition 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- PISLZQACAJMAIO-UHFFFAOYSA-N 2,4-diethyl-6-methylbenzene-1,3-diamine Chemical compound CCC1=CC(C)=C(N)C(CC)=C1N PISLZQACAJMAIO-UHFFFAOYSA-N 0.000 claims description 3
- HCILJBJJZALOAL-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)-n'-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyl]propanehydrazide Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 HCILJBJJZALOAL-UHFFFAOYSA-N 0.000 claims description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The utility model provides a vibrating diaphragm material, includes vibrating diaphragm coating and substrate layer, the vibrating diaphragm coating is formed by the coating of vibrating diaphragm glue solution, the vibrating diaphragm glue solution comprises following parts by weight component: 50-80 parts of acrylic resin, 25-35 parts of polyethylene resin, 10-15 parts of ethylene propylene rubber, 3-5 parts of diethylene glycol monohexyl ether, 3-8 parts of isopropylated triphenyl phosphate, 15-20 parts of glass fiber, 1-3 parts of antioxidant, 1-5 parts of lubricant, 1-5 parts of 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline and 100 parts of solvent. According to the diaphragm material, diethylene glycol monohexyl ether and isopropylated triphenyl phosphate are added into acrylic resin, polyethylene resin and ethylene propylene rubber, so that the maximum pushing volume of the loudspeaker is increased by 39% to the maximum; the frequency response of the loudspeaker is improved, and the maximum frequency response can be improved by 10 dB.
Description
Technical Field
The invention belongs to the technical field of diaphragm materials, and particularly relates to a diaphragm material and a preparation process thereof.
Background
The characteristics of the loudspeaker diaphragm material can have an effect on sound quality. Common materials for the diaphragm are: paper cone, synthetic plastic, high cost titanium metal diaphragm.
At present, the paper cone manufacturing method is to pour paper pulp into a designed mould, and then carry out a series of subsequent processing after drying, so that the common loudspeaker unit diaphragm is formed. The plastic vibration film relates to an electroplating process, and has certain environmental pollution. The smelting alloy metal used by the metal diaphragm has certain toxicity, is difficult to recycle and is harmful to human bodies.
The diaphragm of the cone is sensitive to temperature and humidity changes due to the characteristics of materials, the environmental changes where the diaphragm is located may affect sound, and the cone may deform irreversibly after being subjected to the extreme environmental changes for several times. The rigidity of the plastic diaphragm is relatively general, and music with rich high frequency is not suitable and is easy to generate distortion. The metal diaphragm is generally made of aluminum or an alloy material thereof, is stable relative to other metals and is light in weight. The metal diaphragm is relatively heavy and the damping characteristics are not well calculated, so that driving and controlling the unit is not easy.
Disclosure of Invention
The invention aims to provide a diaphragm material, which can make the sound quality of a loudspeaker better and can obviously improve the maximum pushing volume and frequency response.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a vibrating diaphragm material, includes vibrating diaphragm coating and substrate layer, the vibrating diaphragm coating is formed by the coating of vibrating diaphragm glue solution, the vibrating diaphragm glue solution comprises following parts by weight component: 50-80 parts of acrylic resin, 25-35 parts of polyethylene resin, 10-15 parts of ethylene propylene rubber, 3-5 parts of diethylene glycol monohexyl ether, 3-8 parts of isopropylated triphenyl phosphate, 15-20 parts of glass fiber, 1-3 parts of antioxidant, 1-5 parts of lubricant, 1-5 parts of 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline and 100 parts of solvent.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the scheme, the vibrating diaphragm glue solution comprises the following components in parts by weight: 60-80 parts of acrylic resin, 25-30 parts of polyethylene resin, 10-13 parts of ethylene propylene rubber, 3-4 parts of diethylene glycol monohexyl ether, 3-6 parts of isopropylated triphenyl phosphate, 15-18 parts of glass fiber, 2 parts of antioxidant, 2-3 parts of lubricant, 2-3 parts of 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline and 100 parts of solvent.
2. In the scheme, the antioxidant is selected from one of antioxidant 1010, antioxidant 1024 and antioxidant 2246.
3. In the above embodiment, the lubricant is selected from castor oil, diethyltoluenediamine, or stearic acid amide.
4. In the scheme, the thickness of the base material layer is 15-50 microns.
5. In the scheme, the thickness of the vibrating diaphragm coating is 5-50 mu m.
The other technical scheme of the invention is as follows: a preparation process of a diaphragm material comprises the following steps:
s1, adding 50-80 parts of acrylic resin, 25-35 parts of polyethylene resin, 10-15 parts of ethylene propylene rubber and 1-3 parts of antioxidant into a stirring kettle, and then adding 100 parts of solvent for dissolving;
s2, adding 3-5 parts of diethylene glycol monohexyl ether, 3-8 parts of isopropylated triphenyl phosphate, 15-20 parts of glass fiber, 1-5 parts of lubricant and 1-5 parts of 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline, and uniformly mixing to obtain a vibrating diaphragm glue solution;
s3, defoaming the vibrating diaphragm glue solution, coating the defoaming treatment on the substrate layer, and drying the substrate layer in an oven to obtain a vibrating diaphragm coating;
and S4, rolling the coated diaphragm material to obtain a finished product.
The diaphragm material is used for a loudspeaker and the like.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the diaphragm material, diethylene glycol monohexyl ether and isopropylated triphenyl phosphate are added into acrylic resin, polyethylene resin and ethylene propylene rubber, so that the maximum pushing volume of the loudspeaker is increased by 39% to the maximum; the frequency response of the loudspeaker is improved, and the maximum frequency response can be improved by 10 dB.
Detailed Description
In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships merely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.
The invention is further described below with reference to the following examples:
examples 1 to 4: the utility model provides a vibrating diaphragm material, includes vibrating diaphragm coating and substrate layer, the vibrating diaphragm coating is formed by the coating of vibrating diaphragm glue solution, the vibrating diaphragm glue solution comprises following parts by weight component, as shown in table 1:
TABLE 1
The antioxidant in embodiment 1 is selected from antioxidant 1010, the lubricant is selected from castor oil, the thickness of the base material layer is 15 μm, and the thickness of the diaphragm coating layer is 15 μm.
Embodiment 2 the antioxidant is selected from an antioxidant 2246, the lubricant is selected from stearic acid amide, the thickness of the base material layer is 50 μm, and the thickness of the diaphragm coating layer is 25 μm.
Embodiment 3 the antioxidant is selected from an antioxidant 2246, the lubricant is selected from diethyltoluenediamine, the thickness of the base material layer is 25 μm, and the thickness of the diaphragm coating layer is 36 μm.
Embodiment 4 the antioxidant is selected from antioxidant 1024, the lubricant is selected from castor oil, the thickness of the substrate layer is 25 μm, and the thickness of the diaphragm coating is 50 μm.
The preparation method of the diaphragm material comprises the following steps: s1, adding acrylic resin, polyethylene resin, ethylene propylene rubber and an antioxidant into a stirring kettle, and then adding a solvent for dissolving;
s2, adding diethylene glycol monohexyl ether, isopropylated triphenyl phosphate, glass fiber, a lubricant and 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline, and uniformly mixing to obtain a diaphragm glue solution;
s3, defoaming the vibrating diaphragm glue solution, coating the defoaming treatment on the substrate layer, and drying the substrate layer in an oven to obtain a vibrating diaphragm coating;
and S4, rolling the coated diaphragm material to obtain a finished product.
Comparative examples 1 to 2: the utility model provides a vibrating diaphragm material, includes vibrating diaphragm coating and substrate layer, the vibrating diaphragm coating is formed by the coating of vibrating diaphragm glue solution, the vibrating diaphragm glue solution comprises following parts by weight component, as shown in table 2:
TABLE 2
| Components | Comparative example 1 | Comparative example 2 |
| Acrylic resin | 50 portions of | 60 portions of |
| Polyethylene resin | 35 portions of | 30 portions of |
| Ethylene propylene rubber | 13 portions of | 15 portions of |
| Diethylene glycol monohexyl ether | - | 3.5 parts of |
| Isopropylated triphenyl phosphate | 15 portions of | - |
| Glass fiber | 20 portions of | 15 portions of |
| Antioxidant agent | 1.4 parts of | 1 part of |
| Lubricant agent | 1.6 parts of | 2.5 parts of |
| 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline | 1.4 parts of | 1.5 parts of |
| Solvent(s) | 100 portions of | 100 portions of |
Comparative example the procedure was as in example.
The properties of the diaphragm materials prepared in the above examples 1 to 4 and comparative examples 1 to 2 are shown in table 3:
TABLE 3
As shown in the evaluation results of table 3, the maximum pushed volume of the loudspeaker in comparative example 1 is increased by a small amplitude, and the frequency response of the loudspeaker in comparative example 2 is improved by a small degree, but the maximum pushed volume of the loudspeaker in the embodiment of the present invention is increased by 39% at most; the frequency response of the loudspeaker is improved, and the maximum frequency response can be improved by 10 dB.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is 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 protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. A diaphragm material, characterized in that: including vibrating diaphragm coating and substrate layer, the vibrating diaphragm coating is formed by the coating of vibrating diaphragm glue solution, the vibrating diaphragm glue solution comprises following parts by weight component: 50-80 parts of acrylic resin, 25-35 parts of polyethylene resin, 10-15 parts of ethylene propylene rubber, 3-5 parts of diethylene glycol monohexyl ether, 3-8 parts of isopropylated triphenyl phosphate, 15-20 parts of glass fiber, 1-3 parts of antioxidant, 1-5 parts of lubricant, 1-5 parts of 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline and 100 parts of solvent.
2. The diaphragm material of claim 1, wherein: the vibrating diaphragm glue solution comprises the following components in parts by weight: 60-80 parts of acrylic resin, 25-30 parts of polyethylene resin, 10-13 parts of ethylene propylene rubber, 3-4 parts of diethylene glycol monohexyl ether, 3-6 parts of isopropylated triphenyl phosphate, 15-18 parts of glass fiber, 2 parts of antioxidant, 2-3 parts of lubricant, 2-3 parts of 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline and 100 parts of solvent.
3. The diaphragm material of claim 1, wherein: the antioxidant is selected from one of antioxidant 1010, antioxidant 1024 and antioxidant 2246.
4. The diaphragm material of claim 1, wherein: the lubricant is selected from one of castor oil, diethyl toluene diamine or stearic acid amide.
5. The diaphragm material of claim 1, wherein: the thickness of the substrate layer is 15-50 mu m.
6. The diaphragm material process of claim 1, wherein: the thickness of the vibrating diaphragm coating is 5-50 mu m.
7. A process for preparing a diaphragm material according to any one of claims 1 to 6, wherein: the method comprises the following steps:
s1, adding 50-80 parts of acrylic resin, 25-35 parts of polyethylene resin, 10-15 parts of ethylene propylene rubber and 1-3 parts of antioxidant into a stirring kettle, and then adding 100 parts of solvent for dissolving;
s2, adding 3-5 parts of diethylene glycol monohexyl ether, 3-8 parts of isopropylated triphenyl phosphate, 15-20 parts of glass fiber, 1-5 parts of lubricant and 1-5 parts of 2-methyl-5-amino-N-ethyl benzene sulfonyl aniline, and uniformly mixing to obtain a vibrating diaphragm glue solution;
s3, defoaming the vibrating diaphragm glue solution, coating the defoaming treatment on the substrate layer, and drying the substrate layer in an oven to obtain a vibrating diaphragm coating;
and S4, rolling the coated diaphragm material to obtain a finished product.
8. Use of a diaphragm material as claimed in claim 1, characterized in that: the diaphragm material is used for a loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210027924.5A CN114363775A (en) | 2022-01-11 | 2022-01-11 | Vibrating diaphragm material and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210027924.5A CN114363775A (en) | 2022-01-11 | 2022-01-11 | Vibrating diaphragm material and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114363775A true CN114363775A (en) | 2022-04-15 |
Family
ID=81108729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210027924.5A Pending CN114363775A (en) | 2022-01-11 | 2022-01-11 | Vibrating diaphragm material and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114363775A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008174667A (en) * | 2007-01-19 | 2008-07-31 | Okura Ind Co Ltd | Active energy ray-curable adhesive composition and polarizing plate using the same |
| CN108276740A (en) * | 2017-12-22 | 2018-07-13 | 歌尔股份有限公司 | For the vibrating diaphragm of sound-producing device, the preparation method of vibrating diaphragm and sound-producing device |
| CN109266275A (en) * | 2018-09-12 | 2019-01-25 | 苏州赛伍应用技术股份有限公司 | Microspeaker vibrating diaphragm ball high temperature resistant type bonds glue film and top dome module |
| CN113383034A (en) * | 2019-03-20 | 2021-09-10 | Sika技术股份公司 | Method for adhesively bonding rubber-based thermoplastic substrates |
-
2022
- 2022-01-11 CN CN202210027924.5A patent/CN114363775A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008174667A (en) * | 2007-01-19 | 2008-07-31 | Okura Ind Co Ltd | Active energy ray-curable adhesive composition and polarizing plate using the same |
| CN108276740A (en) * | 2017-12-22 | 2018-07-13 | 歌尔股份有限公司 | For the vibrating diaphragm of sound-producing device, the preparation method of vibrating diaphragm and sound-producing device |
| CN109266275A (en) * | 2018-09-12 | 2019-01-25 | 苏州赛伍应用技术股份有限公司 | Microspeaker vibrating diaphragm ball high temperature resistant type bonds glue film and top dome module |
| CN113383034A (en) * | 2019-03-20 | 2021-09-10 | Sika技术股份公司 | Method for adhesively bonding rubber-based thermoplastic substrates |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114363775A (en) | Vibrating diaphragm material and preparation process thereof | |
| EP1146770B1 (en) | Diaphragm for a loudspeaker and method for the preparation thereof | |
| CN113121955B (en) | Ultrathin halogen-free flame-retardant glass fiber plate with low roughness and preparation method thereof | |
| FI110112B (en) | Stock stable suspensions of epoxy resin hardeners | |
| JP2003289594A (en) | Diaphragm for speaker, and polyamide-imide resin and polyimide resin to be used therefor | |
| CN109825171A (en) | A kind of automobile chassis protection water paint and preparation method thereof | |
| CN106060721B (en) | Vibrating diaphragm and coating method thereof | |
| CN206575585U (en) | One kind tool reeded loudspeaker sound basin and loudspeaker | |
| CN112635918A (en) | Diaphragm, preparation method thereof and battery | |
| CN112693200A (en) | Vibrating diaphragm, preparation method thereof and acoustoelectric device | |
| US10405119B2 (en) | Loudspeaker-diaphragm and loudspeaker including the same | |
| CN110467754A (en) | A kind of low resistance heat resistant type damping mount rubber and preparation method thereof | |
| CN1431850A (en) | Piston type vibration loudspeaker without dangline edge | |
| CN206341417U (en) | Vibrational system and the minitype acoustic generator provided with the vibrational system | |
| CN111996829B (en) | Paper cone containing bulletproof fiber pulp for loudspeaker and preparation method thereof | |
| CN109280404A (en) | Shock-absorbing composite material and its preparation method and application | |
| CN108810754B (en) | Vibrating diaphragm and manufacturing method thereof | |
| CN212097788U (en) | Vibrating diaphragm composite layer structure | |
| CN109905815A (en) | Shaking membrane substrate and preparation method thereof, vibrating diaphragm and loudspeaker | |
| CN212211375U (en) | Vibrating diaphragm | |
| CN206402432U (en) | A kind of sound equipment speech coil framework | |
| CN208638672U (en) | Sound film and loudspeaker | |
| CN112662102A (en) | Rubber diaphragm material and preparation method thereof | |
| CN111526457A (en) | Vibrating diaphragm and preparation method thereof | |
| CN113709634B (en) | Vibrating plate and sound producing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |