CN1228382C - Damper for loudspeaker - Google Patents
Damper for loudspeaker Download PDFInfo
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- CN1228382C CN1228382C CN 02130443 CN02130443A CN1228382C CN 1228382 C CN1228382 C CN 1228382C CN 02130443 CN02130443 CN 02130443 CN 02130443 A CN02130443 A CN 02130443A CN 1228382 C CN1228382 C CN 1228382C
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- latex
- vibroshock
- acid
- carboxylic acid
- unsaturated carboxylic
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Abstract
To provide a damper that can be adjusted to have desired flexibility, manufactured as a softer damper with less fatigue, excellent high temperature high humidity resistance and excellent sound quality for speakers. The damper for speaker is manufactured by impregnating (2) impregnant resulting from mixing a neutralized material between phenol resin and alkali soluble high polymer with latex used for protective colloid to woven cloth (1) of natural or synthetic fibers, drying (3) the impregnated cloth by hot air or the like, and applying hot pressing (4) and die removal processing (5) to the resulting cloth.
Description
Technical field
The invention relates to the loud speaker vibroshock of the vibrational system of support speaker.
Technical background
In the past, as the loud speaker vibroshock, what generally use was weaving cotton cloth resin impregnating cotton fibre and synthon, after making its drying, carry out hot pressing and be shaped, in the past, be impregnated with the vibroshock that weaving cotton cloth of resol carry out hot compacting and have following shortcoming.
1) fatigue of vibroshock
Vibroshock is subjected to the effect of voice coil loudspeaker voice coil and carries out fierce amplitude." impregnated phenolic resin be shaped vibroshock " in the past is subjected to the amplitude effect, because of peeling off of bonding portion between the isolating of resol, fiber and mesh depart from etc., and causes fatigue, and it is very soft that vibroshock becomes.Its result, the lowest resonance frequency number of loud speaker and preliminary phase ratio reduce significantly, cause the frequency response characteristic of loud speaker to change.
2) vibroshock is easy to fatigue in the hot and humid environment
Under hot and humid degree, loud speaker running hours, room temperature environment can make vibroshock produce very big fatigue.Particularly, the automobile-used loud speaker that envrionment conditions is harsh just becomes very important problem.
3) can not make the softish vibroshock
The hardness of vibroshock is normally adjusted with the concentration of the resol that the surface of second order material was flooded that forms matrix, and in the time of making more the softish vibroshock, has to reduce the dipping concentration of resol.Yet resol concentration is crossed when hanging down, and can not keep the shape of vibroshock again.
4) resol and common latex are difficult to mix
In order to overcome these shortcomings, the spy opens in clear 50-117411 number, proposes a kind ofly to mix certain flexibility latex class to resol, with the method for immersion non-woven fabrics core.Yet when usually latex being mixed with resol, resol and as the methyl alcohol of solvent, thinner etc. causes the emulsion condensation sclerosis, is difficult to optionally resol and latex be mixed.
In addition, as temporary transient mixing, only mix with a spot of latex, also may not necessarily bring into play desirable effect, and then, cause mixed solution inhomogeneous, for this reason because cohesion hardened latex is mingled in the inside, the latex of this kind cohesion stops up the mesh of weaving cotton cloth and makes the cementability variation, produces the problem of said loud speaker both poor sound quality.
The present invention is exactly in view of this present situation, its objective is and can adjust desired flexibility, produces more softish vibroshock, and it is little to obtain fatigue thus, and high-temp resisting high-humidity resisting is good, the vibroshock that loud speaker tonequality is good.
Present inventors have carried out all research for achieving the above object, and the result has finished the present invention.
Disclosure of an invention
That is, the invention in the application's claim 1 is, with resol; with mix as the latex of protective colloid with the high molecular corrective of caustic solubility, with weaving cotton cloth of this solution impregnation natural fiber or synthon, make its drying after; carry out hot compacting, form the loud speaker vibroshock.
According to loud speaker vibroshock of the present invention; invention in the application's claim 2 is; with the principal constituent of the high molecular corrective of caustic solubility, be that rubber such as ethene butadienecopolymer, acrylonitrile butadiene copolymer, polyhutadiene are resin system latex such as latex, polystyrene, acrylate, methacrylic ester, vinylchlorid as the latex of protective colloid.
According to loud speaker vibroshock of the present invention, invention in the application's claim 3 is, but the caustic solubility polymer is the multipolymer of ethylene unsaturated monomer of homopolymer, multipolymer, ethene unsaturated carboxylic acid and other copolymerization to each other of ethene unsaturated carboxylic acid of the unsaturated carboxylic acid of ethene.
According to loud speaker vibroshock of the present invention; the invention of the application's claim 4 is; resol concentration (solids component) in the steeping fluid is 1～70 weight %, and the latex (solids component) that is used as protective colloid with caustic solubility polymer corrective is 1～70 weight %.
Description of drawings
Fig. 1 is the illustration intention of loud speaker of the present invention with the vibroshock manufacture method.
Fig. 2 is goods of the present invention and compares goods that lowest resonance frequency is counted the bar graph of reduced rate under each environment.1. work under the room temperature (40W, 24 continuous throughout the twenty-four hour24s), 2. down work (20W, 96 continuous throughout the twenty-four hour24s) of high temperature, 3. during hot and humid work (20W, 96 continuous throughout the twenty-four hour24s) down, A: goods of the present invention and B: the reduced rate of the lowest resonance frequency number of former goods (longitudinal axis, %).
The working of an invention form
Below loud speaker of the present invention is described in more detail with vibroshock.
Fig. 1 is the synoptic diagram of loud speaker of the present invention with 1 example of vibroshock manufacture method; use by following operation and make loud speaker vibroshock 6; promptly; at first; resol and mix the steeping fluid 2 that forms as the latex of protective colloid with the high molecular corrective of caustic solubility, the dipping raw material weaves cotton cloth 1, after carrying out exsiccant drying process (3) with hot blast etc.; in the operation 4 in about 160 ℃ of 5 seconds of following hot pressing, form the stripping process 5 of vibroshock shape with the demoulding.This is an example of manufacture method, and manufacture method of the present invention is not limited in this method, and is needless to say more, also can implement other suitable methods.
Weave cotton cloth with the substrate material of vibroshock as loud speaker of the present invention, can suitably use following weaving cotton cloth, that is, natural fiber such as cotton fibre, silk, Kevlar, trevira, typel, pbo fiber, liquid crystal polymer fibre, acrylic fibre, phenolic resin fibre, boron fibre, amorphous fiber, fluorine fiber, carbon fiber, titanium fiber, etc. the synthon of organic system, inorganic system.
As this steeping fluid of weaving cotton cloth of dipping, use resol and mix the solution that forms as the latex of protective colloid with caustic solubility polymer corrective.Solvent as this solution does not have particular restriction, for example, can use aliphatic lower alcohols such as methyl alcohol, ethanol, Virahol, butanols, and the mixed solvent of the ester of the ketone of their mutual mixed solvents or they and water, acetone, toluene, methylethylketone etc., vinyl acetic monomer etc.
As the resol that uses in the steeping fluid of the present invention, use as the resin of general lamination with the known soluble phenolic resin type of resol.
In the steeping fluid of the present invention; mix with resol usefulness with the high molecular corrective of alkali soluble as the latex of protective colloid; use the acrylic acid series alkali soluble resin of special oligomeric to replace low molecular emulsifying agent; the monomer that will become the latex composition carries out emulsion polymerization; fine with the mixed stability of all kinds of SOLVENTS and resin; and cementability is good, is known (spy opens flat 9-310055) as no soap latex.Promptly, generally in latex is made, when the monomer that will become the latex composition carries out emulsion polymerization, as emulsion stabilizer, use low-molecular-weight emulsifying agent, for example, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, polyoxyethylene phenyl ether sodium sulfate, tensio-active agents such as polyalkylene glycol alkyl ester or ether, used the latex of emulsifying agent to have a lot of problems in the past, insufficient with the mixed stability of all kinds of SOLVENTS and resin, during dry latex, emulsifying agent hinders the system film of latex particle, the free emulsifying agent is shifted to the surface and has been hindered cementability with various materials behind the system film.No soap latex replaces emulsifying agent, as protective colloid, just says with the high molecular corrective this point of alkali-soluble, and is different with former latex, so do not have the above-mentioned general problem of the latex of emulsifying agent in the past of using.
Use among the present invention; with the latex of alkali-soluble polymer corrective as protective colloid; promptly; the principal constituent of no soap latex is that rubber such as styrene-butadiene-copolymer, acrylonitrile butadiene copolymer, polyhutadiene are resin system emulsions such as latex, polystyrene, acrylate, methacrylic ester, vinylchlorid etc.
As the alkali-soluble polymer, for example be vinylformic acid, methacrylic acid, butenoic acid, fumaric acid, toxilic acid, the homopolymer of the ethene unsaturated carboxylic acid of methylene-succinic acid etc., perhaps ethene unsaturated carboxylic acid multipolymer to each other, but the perhaps multipolymer of the ethylene unsaturated monomer of ethene unsaturated carboxylic acid and other copolymerization, for example methyl acrylate, methyl methacrylate, ethyl propenoate, Jia Jibingxisuanyizhi, propyl acrylate, propyl methacrylate, vinylformic acid 2-hydroxy methacrylate, 2-hydroxyethyl methacrylate, vinylbenzene, alpha-methyl styrene, vinyl toluene, vinyl cyanide, methacrylonitrile, acrylamide, Methacrylamide, the interpolymer of vinyl acetate between to for plastic etc.Copolymerization proportioning during the multipolymer of ethene unsaturated carboxylic acid and other ethylene unsaturated monomers such as acrylate or methacrylic ester is 5: 95～80: 20.
About above-mentioned monomeric polymerization process, there is not particular restriction, for example, can use known methods such as solution mixing, mass polymerization, letex polymerization, suspension polymerization.The high molecular molecular-weight average of the alkali-soluble that uses among the present invention as the weight-average molecular weight meter, is 1000～20000 a scope.
As the alkali of the high molecular neutralization usefulness of alkali-soluble, can use methylamine, ethamine, propylamine, N, mineral alkalis such as organic amines such as N-dimethylethanolamine, ammonia, sodium hydroxide, potassium hydroxide etc.And neutralize, there is no need to neutralize fully, for example, degree of neutralization is preferably in more than 70% more than 50%.
The amount of alkali-soluble polymer corrective in the latex with respect to the latex corrective (solids component) of 100 weight parts, is 5～100 weight parts, is preferably 10～50 weight parts.
The concentration of phenol resins (solids component) is 1～70 weight % in the steeping fluid, and the concentration (solids component) that is used as the latex of protective colloid with alkali-soluble polymer corrective is 1～70 weight %, and best, the former is 5～50 weight %, and the latter is 5～50 weight %.
Phenol resins concentration is difficult to keep the shape of vibroshock 1% when following in the steeping fluid, and on the other hand, concentration is 70% when above, and the viscosity of solution is too high, is difficult to make the dipping of weaving cotton cloth.The concentration of above-mentioned latex is below 1%, can not get improving resistance to fatigue, environment resistant effect, on the other hand, when concentration was above above 70%, the same with the situation of phenol resins, soltion viscosity was too high, be difficult to make the dipping of weaving cotton cloth, simultaneously, the mesh of vibroshock can stop up, and the amplitude effect of loud speaker worsens.Produce the problem that cementability descends.
About the ratio of resol in the steeping fluid and latex, there is no need strict restriction, can change arbitrarily according to the characteristic of requirement loud speaker.Be generally 1: 0.1～1: 3 (weight ratio), best 1: 0.5～1: 2 (weight ratio) when the harder vibroshock of needs, can increase the amount of resol, reduces the amount of solvent.Otherwise, when requiring the flexibility vibroshock, use the amount that reduces resol, increase the method for quantity of solvent.
As previously mentioned; feature of the present invention is as steeping fluid; used resol and with the mixed solution of alkali-soluble polymer corrective as the latex of protective colloid; about the shape that makes the pickup of weaving cotton cloth, drying means, degree of drying, hot pressing condition, vibroshock, manufacturing process etc.; compared with former known method; do not have special feature, can suitably carry out according to former known method.
Embodiment
Below listed representative embodiment, the present invention has been done more specifically explanation.But these only are to be the example of explanation, and therefore needless to say more, the present invention is not limited by these examples yet.
(steeping fluid composition)
Water soluble phenol resin (solids component 50%): 20 parts (weight part, below identical)
The no soap latex of styrene butadiene system (Japanese ゼ オ Application Co., Ltd. system, ニ ボ one Le SX1100 is solids component 45%): 20 parts
Methyl alcohol: 60 parts
(shaping of vibroshock)
Weaving cotton cloth of Kevlar (Teijin Ltd's system, コ one ネ Star Network ス CO2053) is immersed in the above-mentioned steeping fluid, with its with warm air drying after, in 165 ℃ of 5 seconds of following hot pressing, shape and be vibroshock.
For relatively, only make the aromatic polyamide fibre impregnated phenolic resin of weaving cotton cloth, hot pressing is processed into and is formed vibroshock (relatively goods) under identical conditions.
(performance relatively)
1. work under the room temperature
Vibroshock of the present invention and comparison goods are assembled in the loud speaker that each bore is 16cm, each loud speaker under room temperature environment, was made the loud speaker non-stop run 24 hours with 40W, lowest resonance frequency number before and after the determination test and output acoustic pressure, carry out the performance comparison test, the results are shown in table 1.
Table 1
| Test sample | Lowest resonance frequency number (Hz) | Output acoustic pressure (dB) | ||||
| Before the test | After the test | Difference | Before the test | After the test | Difference | |
| Goods in the past | 81.91 | 64.63 | -17.28，-21.1％ | 87.76 | 87.48 | -0.28，-0.032％ |
| 81.54 | 64.91 | -16.63.-20.4％ | 87.42 | 87.31 | -0.09，-0.013％ | |
| Goods of the present invention | 83.91 | 72.01 | -11.9，-14.2％ | 87.11 | 86.98 | -0.13，-0.015％ |
| 82.38 | 71.32 | -11.06，-13.4％ | 87.14 | 87.02 | -0.12，-0.014％ | |
2. high temperature work down
To assemble vibroshock of the present invention and relatively above-mentioned each loud speakers of goods is under 80 ℃ environment, with 20W non-stop run 96 hours, lowest resonance frequency number before and after the determination test and output acoustic pressure were carried out the performance comparison test, the results are shown in table 2.
Table 2
| Test sample | Lowest resonance frequency number (Hz) | Output acoustic pressure (dB) | ||||
| Before the test | After the test | Difference | Before the test | After the test | Difference | |
| Goods in the past | 79.17 | 52.48 | -26.69，-33.7％ | 87.65 | 87.43 | -0.22，-0.025％ |
| 81.87 | 55.30 | -26.57，-32.5％ | 87.86 | 87.37 | -0.49，-0.056％ | |
| Goods of the present invention | 81.81 | 68.30 | -13.51，-16.5％ | 86.99 | 87.08 | +0.09，0.01％ |
| 84.90 | 70.00 | -14.9，-17.6％ | 87.24 | 87.26 | +0.02，0.002％ | |
3. hot and humid work down
With having assembled vibroshock of the present invention and above-mentioned each loud speaker that compares goods, at 60 ℃, under 95% the hot and humid environment, with 20W non-stop run 96 hours, lowest resonance frequency number before and after the determination test and output acoustic pressure are carried out the performance comparison test, the results are shown in table 3.
Table 3
| Test sample | Lowest resonance frequency number (Hz) | Output acoustic pressure (dB) | ||||
| Before the test | After the test | Difference | Before the test | After the test | Difference | |
| Goods in the past | 84.27 | 51.5 | -32.77，-38.9％ | 87.10 | 86.72 | -0.38，-0.44％ |
| 82.90 | 50.64 | -32.26，-38.9％ | 87.15 | 86.80 | -0.35，-0.40％ | |
| Goods of the present invention | 84.98 | 66.76 | -18.22，-21.4％ | 87.12 | 87.14 | +0.02，0.02％ |
| 85.08 | 65.67 | -19.41，-22.8％ | 87.06 | 87.08 | +0.02，0.02％ | |
The present invention compared with former goods, and the reduction of test back lowest resonance frequency number is greatly improved, and the output sound pressure variations of test front and back is little unlike former goods.Changes of properties is with regard to the rigor condition of hot environment, hot and humid environment, with the performance difference increase of former goods.This just demonstrates vibroshock of the present invention and former goods compare, and is environment resistant good.Be difficult to produce tired.
Fig. 2 illustrates the reduced rate of the lowest resonance frequency number of above-mentioned data (n=2's is average) with bar graph, this figure represents that clearly goods of the present invention and former goods compare, and also are difficult to produce tired in any case.
The effect of invention
The damper that damper of the present invention and former impregnated phenolic resin are shaped relatively has following characteristics.
1) damper is tired little
The lowest resonance frequency number reduces very little behind the continuous working test.
2) high-temp resisting high-humidity resisting is good
Because the composition of no soap latex is topped cloth materials surface, so high-temp resisting high-humidity resisting is good, even loud speaker is worked under hot and humid environment, the reduction of lowest resonance frequency number is also very little.
3) can make more softish vibroshock
For resol, increase the usage rate of no soap latex, the vibroshock of the hardness that can not produce before can producing.
4) tonequality of loud speaker is fine
By in resol, cooperating no soap latex, changed the tracing ability of vibroshock to amplitude, linear fine, obtained the good vibroshock of tonequality.
5) resol and no soap latex can cooperate arbitrarily.
Resol and no soap latex are cooperated.The blended steeping fluid can at random dilute with methyl alcohol equal solvent or water.This steeping fluid is uniform and stable.
Claims (3)
1. loud speaker vibroshock; feature is to mix with resol with the latex of the high molecular corrective of alkali-soluble as protective colloid; with the solution impregnation natural fiber of gained or weaving cotton cloth of synthon; after making its drying; carry out hot compacting; wherein; the alkali-soluble polymer is the homopolymer that is selected from the ethene unsaturated carboxylic acid; ethene unsaturated carboxylic acid multipolymer to each other; but any one in the multipolymer of the ethylene unsaturated monomer of ethene unsaturated carboxylic acid and other copolymerization; its weight-average molecular weight is 1; 000～20; 000 scope; resol concentration in the steeping fluid is counted 1～70 weight % by solids component, counts 1～70 weight % as the latex of protective colloid by solids component with the high molecular corrective of alkali-soluble.
2. according to the loud speaker vibroshock of claim 1; feature is to be that the rubber that is selected from styrene-butadiene-copolymer, acrylonitrile butadiene copolymer or polyhutadiene is latex with the high molecular corrective of alkali-soluble as the principal constituent of the latex of protective colloid, perhaps is selected from the resin system latex of polystyrene, acrylate, methacrylic ester, vinylchlorid.
3. according to the loud speaker vibroshock of claim 1, feature is that the alkali-soluble polymer is to be selected from vinylformic acid, methacrylic acid, butenoic acid, fumaric acid, the homopolymer of the ethene unsaturated carboxylic acid of toxilic acid or methylene-succinic acid or ethene unsaturated carboxylic acid multipolymer to each other, but the perhaps multipolymer of the ethylene unsaturated monomer of ethene unsaturated carboxylic acid and other copolymerization, but the ethylene unsaturated monomer of described other copolymerization is selected from methyl acrylate, methyl methacrylate, ethyl propenoate, Jia Jibingxisuanyizhi, propyl acrylate, propyl methacrylate, vinylformic acid 2-hydroxy methacrylate, 2-hydroxyethyl methacrylate, vinylbenzene, alpha-methyl styrene, vinyl toluene, vinyl cyanide, (methyl) vinyl cyanide, acrylamide, copolymerization ratio when Methacrylamide or vinyl acetate between to for plastic, the multipolymer of ethene unsaturated carboxylic acid and other ethylene unsaturated monomer is 5: 95～80: 20.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP263544/2001 | 2001-08-31 | ||
| JP2001263544A JP2003078993A (en) | 2001-08-31 | 2001-08-31 | Damper for speaker |
| JP263544/01 | 2001-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1404340A CN1404340A (en) | 2003-03-19 |
| CN1228382C true CN1228382C (en) | 2005-11-23 |
Family
ID=19090283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02130443 Expired - Fee Related CN1228382C (en) | 2001-08-31 | 2002-08-20 | Damper for loudspeaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2003078993A (en) |
| CN (1) | CN1228382C (en) |
| TW (1) | TW552822B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006203728A (en) | 2005-01-24 | 2006-08-03 | Matsushita Electric Ind Co Ltd | Speaker damper, its production method, speaker used with it, electronic device, and apparatus |
| JP2007204624A (en) * | 2006-02-02 | 2007-08-16 | Dainippon Ink & Chem Inc | Aqueous phenolic resin composition and binder |
| CN103369449A (en) * | 2012-04-05 | 2013-10-23 | 大原博 | Preparation method for horn vibrating reeds |
| CN107182013B (en) * | 2016-03-11 | 2020-04-21 | 大原博 | Loudspeaker vibrating piece and manufacturing method thereof |
| 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 |
| CN111910462B (en) * | 2020-08-06 | 2022-12-06 | 国光电器股份有限公司 | Paper cone containing carbon fibers for loudspeaker and preparation method thereof |
| TWI813025B (en) * | 2021-05-03 | 2023-08-21 | 大原祐子 | Horn vibrating piece containing water-soluble phenolic resin and manufacturing method thereof |
-
2001
- 2001-08-31 JP JP2001263544A patent/JP2003078993A/en active Pending
-
2002
- 2002-07-18 TW TW91116008A patent/TW552822B/en not_active IP Right Cessation
- 2002-08-20 CN CN 02130443 patent/CN1228382C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| TW552822B (en) | 2003-09-11 |
| JP2003078993A (en) | 2003-03-14 |
| CN1404340A (en) | 2003-03-19 |
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