CN212910052U - Loudspeaker sound membrane and loudspeaker comprising same - Google Patents
Loudspeaker sound membrane and loudspeaker comprising same Download PDFInfo
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- CN212910052U CN212910052U CN202021631499.3U CN202021631499U CN212910052U CN 212910052 U CN212910052 U CN 212910052U CN 202021631499 U CN202021631499 U CN 202021631499U CN 212910052 U CN212910052 U CN 212910052U
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Abstract
The utility model provides a loudspeaker sound film and a loudspeaker comprising the same, wherein the loudspeaker sound film comprises a base body and a damping glue layer arranged on at least one surface of the base body; the substrate is twill cloth. The sound film of the loudspeaker reduces nodes at staggered positions through a special weaving structure of twill cloth, and staggered points generating stress concentration are reduced; and the sound film is matched with the damping adhesive layer, so that the sound film of the loudspeaker has good fatigue burst strength and reliability in vibration, and the service life of the sound film is effectively prolonged. The loudspeaker sound film is applied to a loudspeaker, so that the loudspeaker has mechanical damping Qms and excellent moisture and heat resistance, the sound film cannot crack under high power, and the loudspeaker sound film has excellent use stability and reliability.
Description
Technical Field
The utility model belongs to the technical field of the speaker, concretely relates to speaker sound membrane and contain its speaker.
Background
The diaphragm is a key component of the loudspeaker vibration system and has a great influence on the sound quality and the service life of the loudspeaker. In the loudspeaker, the sound film is mainly bonded with the voice coil or the voice coil framework, and after the loudspeaker is electrified, the sound film is driven by the voice coil or the voice coil framework to vibrate in a reciprocating mode. When the factors of the voice diaphragm are studied in the direction of the voice quality, the factors can be roughly classified into two categories: form factor and material factor; the shape factors comprise caliber, depth, sound film curve, thickness, corrugated ring shape and the like, which directly influence frequency response, sound pressure and resonant frequency; the material quality factors mainly affect the inherent timbre, including material characteristics, mixing ratio, additives, preparation method and processing technology. From the aspect of usability, the sound membrane vibrates reciprocally during operation, so that good bending resistance is required, and breakage and shortened service life caused by stress concentration during vibration are reduced or avoided.
The sound film material of the loudspeaker comprises a polymer film, textile, paper material, ceramic material and the like; among them, the woven fabrics exemplified by cotton cloth, silk and silk cloth have good processability and mechanical properties, and have a wide application in sound films of various speakers. For example, CN203072140U discloses a novel sound membrane, which comprises a sound membrane body, wherein the sound membrane body is circular, two circles of grooves are arranged on the side edge of the sound membrane body, a first protrusion is arranged in the middle of the sound membrane body, and W-groove-shaped second protrusions are uniformly distributed on the first protrusion; the sound membrane body is made of cotton cloth. The sound film is not easy to deform, and has strong flatness and sound copper property. CN210431858U discloses a compound sound film speaker monomer, compound sound film speaker monomer's basin frame top is equipped with the sound film, is equipped with compound cloth layer on the ball top upper surface of sound film, compound cloth layer includes silk cloth layer, silica gel layer and PU layer, the upper surface on silica gel layer on be equipped with the silk cloth layer, be equipped with the PU layer on the lower surface on silica gel layer. CN208874723U discloses a coaxial earphone speaker, which includes a support, a bass earphone speaker and a treble earphone speaker; high pitch sound membrane in the high pitch earphone speaker includes second dome, second book ring and dangles limit, and the material of second book ring and dangling limit is one of high damping cotton or silk cloth. CN103686547A discloses a loudspeaker diaphragm, which comprises a ball top located at the center and a ring-folded portion located at the edge, wherein the ball top and/or the ring-folded portion comprise silk cloth and thermoplastic polyurethane combined with the silk cloth, and the surface of the silk cloth is coated with thermosetting adhesive; the silk cloth and the thermoplastic polyurethane are in a hot-pressing combined structure; the diaphragm has good rigidity and damping characteristics.
However, the existing cloth sound film has poor durability and unsatisfactory yield resistance, and the sound film is easy to have stress concentration in the reciprocating vibration working process of the loudspeaker; when the amplitude and power of the vibration are too large, the sound film is broken, which severely shortens the service life of the speaker.
Therefore, the development of a loudspeaker sound film with good bending resistance, high reliability and long service life is the key research point in the field.
SUMMERY OF THE UTILITY MODEL
To prior art's not enough, the utility model aims to provide a speaker sound membrane and contain its speaker, the speaker sound membrane adopts the twill cloth base member, weaves the structure through the special of twill cloth and has reduced the alternating point that produces stress concentration to cooperate it with the damping glue film, make reliability when the speaker sound membrane has good fatigue burst and vibration has effectively prolonged the life of sound membrane.
In order to achieve the purpose of the utility model, the utility model adopts the following technical proposal:
in a first aspect, the present invention provides a loudspeaker sound film, which includes a base body and a damping adhesive layer disposed on at least one surface of the base body; the substrate is twill cloth.
The existing cloth sound film generally adopts a plain cloth matrix, and the structure of the plain cloth is that weft threads are picked one by one and pressed one by one when passing through warp threads, and the weft threads and the warp threads are circulated in sequence to form the plain cloth; the cross points of the warp and weft interlacing weaving are more, stress concentration can be generated at the cross positions, and the strain is smaller. When the plain cloth is used as the sound film substrate, the reciprocating vibration of the loudspeaker during operation can cause the plain cloth to break, and the loudspeaker cannot be used continuously. The utility model provides a loudspeaker sound membrane uses twill cloth as a basal body, the structure of the twill cloth is characterized in that one weft is selected, two or three weft are pressed, the weft is circulated in sequence, and the weft moves forwards in a staggered way relative to the previous row when the next row is carried out, so that the twill cloth is formed; the twill cloth can reduce nodes at staggered positions and staggered points generating stress concentration; compared with plain cloth, the staggered points in the twill cloth can be reduced by about 1 time. Speaker sound membrane cooperate twill cloth base member and damping glue film, reliability and damping characteristic when having increased the fatigue burst length of sound membrane, vibration have effectively prolonged the life of speaker sound membrane.
The utility model discloses in, the twill cloth includes any one of twill cotton cloth, twill silk cloth or twill polyester cloth.
Preferably, the woven cloth comprises woven cloth.
The utility model discloses in, the weight of twill cloth is 65 ~ 95g/m2For example 66g/m2、68g/m2、 70g/m2、72g/m2、74g/m2、76g/m2、78g/m2、80g/m2、81g/m2、83g/m2、85g/m2、 87g/m2、89g/m2、90g/m2、91g/m2、93g/m2Or 94g/m2And the specific values between the stated values, are not intended to be exhaustive or to limit the invention to the precise values encompassed within the scope, for reasons of brevity and clarity.
The utility model discloses in, the base member is through the base member of sclerosis processing.
Preferably, the hardening treatment agent is a thermosetting phenol resin.
The utility model discloses in, the damping glue film is the composite bed of butadiene-styrene copolymer, butadiene-acrylonitrile copolymer and polyacrylic acid.
The damping adhesive layer of the utility model is a composite layer of butadiene-styrene copolymer, butadiene-acrylonitrile copolymer and polyacrylic acid, wherein, the polyacrylic acid can increase the flexibility and the machinability of the loudspeaker sound film and has damping effect; the butadiene-styrene copolymer and the butadiene-acrylonitrile copolymer are beneficial to increasing the density of the damping adhesive layer and have a certain moisture-proof effect. The composite damping adhesive layer endows the loudspeaker sound film with good damping characteristic, processability and moisture resistance.
The utility model discloses in, the thickness of damping glue film is 0.001 ~ 0.1mm, for example 0.002mm, 0.005 mm, 0.008mm, 0.01mm, 0.015mm, 0.02mm, 0.025mm, 0.03mm, 0.035mm, 0.04mm, 0.045mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm or 0.095 mm to and the concrete point value between the above-mentioned, be limited to the point value width of a word and in concise consideration, the utility model discloses no longer the exhaustive enumeration specific point value that the scope includes.
The utility model discloses in, the upper and lower surface of base member all sets up the damping glue film.
The utility model discloses in, the weight of speaker sound membrane is 90 ~ 140g/m2E.g. 92g/m2、95 g/m2、98g/m2、100g/m2、102g/m2、105g/m2、108g/m2、110g/m2、112g/m2、 115g/m2、118g/m2、120g/m2、122g/m2、125g/m2、128g/m2、130g/m2、132g/m2、 135g/m2、137g/m2Or 139g/m2And the specific values between the stated values, are not intended to be exhaustive or to limit the invention to the precise values encompassed within the scope, for reasons of brevity and clarity.
The utility model discloses in, the thickness of speaker sound membrane is 0.1 ~ 0.3mm, for example 0.11mm, 0.13 mm, 0.15mm, 0.17mm, 0.19mm, 0.2mm, 0.21mm, 0.23mm, 0.25mm, 0.27mm or 0.29mm to and the specific point value between the above-mentioned point value, be limited to the space and in the concise consideration, the utility model discloses no longer the exhaustive enumeration the specific point value that the scope includes.
On the other hand, the utility model provides a loudspeaker, including as above in the loudspeaker sound membrane.
The utility model provides a speaker sound membrane can be prepared through following method, the method includes: coating damping glue on at least one surface of the substrate, and drying to obtain the loudspeaker sound film; the substrate is twill cloth.
Preferably, the matrix is a hardened matrix, and the specific method comprises the following steps: and soaking the matrix in thermosetting phenolic resin glue solution for treatment, and then drying at 60-110 ℃ to obtain the hardened matrix.
Preferably, the solid content of the thermosetting phenolic resin glue solution is 0.5-25%, such as 0.8%, 1%, 1.2%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, or the like.
Preferably, the method for coating the damping adhesive comprises dip coating, knife coating, roll coating or spray coating.
Illustratively, the method for coating the damping glue comprises the following steps: and (3) immersing the substrate into a glue groove of damping glue, and then finishing coating by means of glue scraping.
Preferably, the damping glue comprises the following components in parts by weight: 20 to 40 parts by weight (e.g., 21 parts by weight, 23 parts by weight, 25 parts by weight, 27 parts by weight, 29 parts by weight, 30 parts by weight, 31 parts by weight, 33 parts by weight, 35 parts by weight, 37 parts by weight, 39 parts by weight, etc.), 20 to 40 parts by weight (e.g., 21 parts by weight, 23 parts by weight, 25 parts by weight, 27 parts by weight, 29 parts by weight, 30 parts by weight, 31 parts by weight, 33 parts by weight, 35 parts by weight, 37 parts by weight, 39 parts by weight, etc.) of a nitrile latex, and 20 to 50 parts by weight (e.g., 21 parts by weight, 23 parts by weight, 25 parts by weight, 27 parts by weight, 29 parts by weight, 30 parts by weight, 31 parts by weight, 33 parts by weight, 35 parts by weight, 37 parts by weight, 39 parts by weight, 40 parts by weight, 41 parts by weight, 43 parts by weight, 45 parts by weight, 47 parts by weight, or 49 parts by weight.
Preferably, the drying temperature is 60-110 ℃, such as 62 ℃, 64 ℃, 66 ℃, 68 ℃, 70 ℃, 72 ℃, 74 ℃, 76 ℃, 78 ℃, 80 ℃, 82 ℃, 84 ℃, 86 ℃, 88 ℃, 90 ℃, 92 ℃, 94 ℃, 96 ℃, 98 ℃, 100 ℃, 101 ℃, 103 ℃, 105 ℃, 107 ℃ or 109 ℃.
Preferably, the loudspeaker sound film further comprises the steps of hot press forming, cooling and punching.
Preferably, the hot press forming temperature is 210-275 deg.C, such as 215 deg.C, 220 deg.C, 225 deg.C, 230 deg.C, 235 deg.C, 240 deg.C, 245 deg.C, 250 deg.C, 252 deg.C, 254 deg.C, 256 deg.C, 258 deg.C, 260 deg.C, 261 deg.C, 263 deg.C, 265 deg.C, 267 deg.C, 269 deg.C, 270 deg.C.
Preferably, the dwell time of the hot press forming is 5 to 20s, such as 6s, 8s, 10s, 11s, 13 s, 15s, 17s, 19s, or the like.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a loudspeaker sound membrane takes twill cloth as a basal body, and staggered position nodes are reduced through the special weaving structure of the twill cloth, so that staggered points generating stress concentration are reduced; and the sound film is matched with the damping adhesive layer, so that the sound film of the loudspeaker has good fatigue burst strength and reliability in vibration, and the service life of the sound film is effectively prolonged. The loudspeaker sound film is applied to a loudspeaker, the loudspeaker can have mechanical damping Qms and excellent moisture and heat resistance, the F0 change rate after the loudspeaker sound film is processed for 24 hours at 40 ℃ and 90% humidity is as low as 1.78%, the sound film cannot crack under high power, and the loudspeaker sound film has excellent use stability and reliability.
Drawings
FIG. 1 is a schematic view of the structure of a twill cloth in example 1;
FIG. 2 is a structural diagram of a diaphragm component made of the diaphragm of the loudspeaker provided in example 1;
FIG. 3 is a schematic view showing the structure of the plain cloth of comparative example 1;
fig. 4 is a structural view of a diaphragm member made of the loudspeaker diaphragm provided in comparative example 1.
Detailed Description
The technical solution of the present invention will be further explained by the following embodiments. It should be understood by those skilled in the art that the described embodiments are merely provided to assist in understanding the present invention and should not be construed as specifically limiting the present invention.
The experimental materials used in the following examples and comparative examples of the present invention are as follows:
(1) twill cloth: including twill silk cloth, twill cotton cloth or twill teduo cloth, all purchased from hey state Xinyu electronics ltd;
(2) treating agent for hardening treatment: thermosetting phenolic resin, No. 4703QR, available from hey hou sinyu electronics ltd;
(3) styrene-butadiene latex: 106QR from KUMLHO Corp., Korea; nitrile latex: 341, acrylic emulsion: the products were obtained from the Korean POLYMER corporation under the designation 891K.
Example 1
A loudspeaker sound membrane comprises twill cloth (twill silk cloth with weight of 80 g/m)2) The structure of the twill cloth comprises a base body and damping glue layers arranged on two surfaces of the twill cloth base body, wherein the schematic structural diagram of the twill cloth is shown in figure 1.
The preparation method comprises the following steps:
(1) dipping the twill cloth in thermosetting phenolic resin glue solution with solid content of 5%, wherein the dipping time is 8s, taking out the twill cloth, drying the twill cloth at 90 ℃ to volatilize the solvent, and obtaining a hardened matrix;
(2) uniformly mixing 30 parts by weight of styrene-butadiene latex, 30 parts by weight of butyronitrile latex and 40 parts by weight of acrylic emulsion to obtain damping rubber; and (2) immersing the substrate obtained in the step (1) into a glue groove of damping glue, then scraping the glue, drying at 100 ℃, and then coiling the material to obtain the loudspeaker sound film.
Placing the loudspeaker voice membrane provided by the embodiment 1 in a mould press to carry out hot press forming at 260 ℃, keeping the pressure for 10s, cooling and punching to obtain a voice membrane component, wherein the organizational structure diagram of the voice membrane component is shown in FIG. 2; as can be seen from fig. 2, it has a twill weave structure.
Example 2
A loudspeaker sound membrane comprises twill cloth (denim, weight of 75 g/m)2) The damping adhesive layer is arranged on 1 surface of the twill cloth substrate, and the schematic structural diagram of the twill cloth is shown in figure 1.
The preparation method comprises the following steps:
(1) dipping the twill cloth in thermosetting phenolic resin glue solution with the solid content of 2%, wherein the dipping time is 10s, taking out the twill cloth, drying the twill cloth at 80 ℃ to volatilize the solvent, and obtaining a hardened matrix;
(2) uniformly mixing 20 parts by weight of styrene-butadiene latex, 40 parts by weight of butyronitrile latex and 40 parts by weight of acrylic emulsion to obtain damping rubber; and (2) coating the damping glue on the single surface of the substrate obtained in the step (1), drying at 90 ℃, and rolling to obtain the loudspeaker sound film.
Example 3
A loudspeaker sound membrane comprises twill cloth (Twill Teduolong cloth with weight of 95 g/m)2) The structure of the twill cloth comprises a base body and damping glue layers arranged on 2 surfaces of the twill cloth base body, wherein the schematic structural diagram of the twill cloth is shown in figure 1.
The preparation method comprises the following steps:
(1) dipping the twill cloth in thermosetting phenolic resin glue solution with solid content of 10%, taking out after 10s, drying at 100 ℃ to volatilize the solvent, and obtaining a hardened matrix;
(2) uniformly mixing 40 parts by weight of styrene-butadiene latex, 40 parts by weight of butyronitrile latex and 20 parts by weight of acrylic emulsion to obtain damping rubber; and (2) immersing the substrate obtained in the step (1) into a glue groove of damping glue, then scraping the glue, drying at 110 ℃, and then coiling the material to obtain the loudspeaker sound film.
Comparative example 1
A loudspeaker sound film, which is different from the loudspeaker sound film in embodiment 1 only in that the substrate is a plain cloth, and the structural schematic diagram of the plain cloth is shown in fig. 3; the other structures and the preparation steps of the loudspeaker sound film are the same as those in the embodiment 1.
The loudspeaker voice diaphragm provided in comparative example 1 was formed into a voice diaphragm member having a structural view as shown in fig. 4 in the same manner as in example 1.
And (3) performance testing:
(1) tension of warp and weft, tension of slant 45 degrees: setting the width of a sample to be tested to be 10mm, and testing by using a servo tensile testing machine (HZ-1003C, Dongguan commercially available force display instrument science and technology Co., Ltd.), wherein the specific steps are carried out according to a method specified in national standard GB/T3923.1-1997 determination of tensile property of fabric-breaking strength and elongation at break;
(2) loudspeaker mechanical damping factor value Qms: assembling a loudspeaker sound film to be tested into a national photoelectric device P63T loudspeaker, and testing through an electroacoustic testing system (AD0713) of Klippel RD in Germany;
(3) moisture resistance: assembling a sound film of a loudspeaker to be tested into a national photoelectric device P63T loudspeaker, testing the sound film in a high-temperature hot flash test device (40 ℃, the humidity is 90%) for 24 hours, testing the resonance frequency F0 value of a sample, and comparing the resonance frequency F0 value with the F0 value before the high-temperature hot flash test to obtain the F0 change rate; the F0 value was measured by a paper drum F0 tester (TC6000-LK, Tengcheng electronics, Inc.);
(4) and (3) power test: and (3) assembling the sound film of the loudspeaker to be tested into a national photoelectric device P63T loudspeaker, testing by adopting a JINGZHEN power test system (JS1131), setting parameters to be 15W and 3.5 omega, carrying out AMS test, and observing whether the appearance of the sound film changes or not, wherein OK represents no obvious change.
The mechanical properties, damping properties, humidity resistance and power of the loudspeaker sound films provided in examples 1 to 3 and comparative example 1 were tested according to the above experimental methods, and the obtained test data are shown in table 1.
TABLE 1
According to the data of table 1, compare with comparative example 1 that adopts plain weave cloth as the base member, the utility model discloses the speaker sound membrane that embodiment 1 ~ 3 provided uses twill cloth as the base member, the yarn staggers in the twill cloth, and during the skew 45 degrees, the atress is mostly for the yarn node support, and twill cloth pulling force is little a lot of, and stress is not concentrated, consequently can not take place the phenomenon of splitting in the power test.
Through the fatigue burst tolerance contrast that the power test obtained, the speaker sound membrane in comparative example 1 adopts the plain weave cloth base member, has obvious phenomenon of breaking when power is too big, and the utility model discloses the fatigue burst tolerance of speaker sound membrane that embodiment 1 provided is good, does not take place to corrugate or damaged phenomenon.
And simultaneously, the utility model provides a hierarchical structure of speaker sound membrane adoption twill cloth base member and damping glue layer's combination makes and contains speaker sound membrane's speaker has excellent high temperature resistant hot and humid hot performance under the prerequisite of certain mechanical damping (Qms), makes the F0 rate of change of speaker less, can hang down to 1.78%.
The applicant states that the present invention is described by the above embodiments, but the present invention is not limited to the above embodiments, i.e. the present invention is not meant to be implemented only by relying on the above embodiments. It should be clear to those skilled in the art that any improvement of the present invention is to the equivalent replacement of the selected raw materials, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.
Claims (9)
1. The loudspeaker sound film is characterized by comprising a base body and a damping glue layer arranged on at least one surface of the base body; the substrate is twill cloth.
2. The loudspeaker sound film according to claim 1, wherein the twill cloth comprises any one of a twill cloth, a twill silk cloth, or a twill polyester cloth.
3. The loudspeaker voice film according to claim 1 or 2, wherein the weight of the twill cloth is 65 to 95g/m2。
4. A loudspeaker voice diaphragm according to claim 1 or claim 2, characterised in that the substrate is a hardened substrate.
5. The loudspeaker voice film according to claim 1, wherein the thickness of the damping glue layer is 0.001-0.1 mm.
6. The loudspeaker voice film according to claim 1, wherein the upper and lower surfaces of the base are provided with damping glue layers.
7. The loudspeaker voice film according to claim 1, wherein the loudspeaker voice film has a weight of 90-140 g/m2。
8. The loudspeaker voice film according to claim 1, wherein the loudspeaker voice film has a thickness of 0.1-0.3 mm.
9. A loudspeaker comprising a loudspeaker membrane according to any one of claims 1 to 8.
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| CN202021631499.3U CN212910052U (en) | 2020-08-07 | 2020-08-07 | Loudspeaker sound membrane and loudspeaker comprising same |
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| CN202021631499.3U CN212910052U (en) | 2020-08-07 | 2020-08-07 | Loudspeaker sound membrane and loudspeaker comprising same |
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| CN212910052U true CN212910052U (en) | 2021-04-06 |
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