CN114989616A - Vibrating diaphragm of sound production device, preparation method of vibrating diaphragm and sound production device - Google Patents
Vibrating diaphragm of sound production device, preparation method of vibrating diaphragm and sound production device Download PDFInfo
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- CN114989616A CN114989616A CN202210579950.9A CN202210579950A CN114989616A CN 114989616 A CN114989616 A CN 114989616A CN 202210579950 A CN202210579950 A CN 202210579950A CN 114989616 A CN114989616 A CN 114989616A
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Images
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- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
-
- 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
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
- C08J2383/07—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- 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
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
-
- 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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application discloses sound generating mechanism's vibrating diaphragm and preparation method, sound generating mechanism thereof, the vibrating diaphragm includes silicon rubber rete, silicon rubber rete contains netted polymer, netted polymer contains first chain segment and second chain segment, first chain segment is
The second chain segment is
Wherein the first chainThe R group in the segment is-CH 3 、
And
any one of (1), R in the second segment 1 The group being-CH 3 、‑CH 2 Br and-CH 2 Any one of Cl. When the second segment is
And in the process, the large steric effect is achieved, and the damping of the vibrating diaphragm can be improved. When the second segment is
Or
In the process, the steric hindrance effect is achieved, the action of the inducing force and the orienting force in the intermolecular acting force is increased, the movement of a molecular chain is limited, and the damping performance of the vibrating diaphragm is improved.
Description
Technical Field
The application relates to the technical field of electroacoustic, in particular to a vibrating diaphragm of a sound generating device, a preparation method of the vibrating diaphragm and the sound generating device using the vibrating diaphragm.
Background
Compared with a multilayer composite structure vibrating diaphragm, the single-layer vulcanized rubber vibrating diaphragm has the advantages of simple production process, good comprehensive performance and the like in the conventional sound production device. The silicon rubber diaphragm has the characteristics of excellent low-temperature resistance, good rebound resilience, good heat resistance, good aging resistance and the like, and becomes a hotspot direction for the development of diaphragms.
However, the silicon rubber diaphragm has some defects as follows:
firstly, the silicon rubber molecular chain segment has high flexibility, so that the friction among molecular chains is small, the damping performance of the material is poor, and the loss factor is less than 0.1, so that the silicon rubber vibrating diaphragm is easy to distort.
Secondly, the mechanical properties of the silicone rubber are general, the tensile strength of the silicone rubber is low, the tearing property is also general, and the silicone rubber is easy to damage and lose efficacy in a long-term vibration process.
Thirdly, the thickness of the silicon rubber diaphragm is large, and the weight is heavy, so that the medium-frequency sensitivity of the diaphragm is low.
Disclosure of Invention
The invention aims to provide a vibrating diaphragm of a sound production device, which can solve the technical problem that a silicon rubber vibrating diaphragm in the prior art is low in modulus, tensile strength and tearing strength.
The invention also aims to provide a preparation method of the diaphragm, which can prepare the diaphragm of the sound production device.
The invention further aims to provide a sound production device consisting of the vibrating diaphragm.
In order to achieve the above object, the present invention provides the following technical solutions.
According to the diaphragm of the sound production device in the embodiment of the first aspect of the present invention, the diaphragm includes the silicon rubber film layer, the silicon rubber film layer includes the mesh polymer, the mesh polymer includes the first chain segment and the second chain segment, and the first chain segment is
The second chain segment is
Wherein the R group in the first chain segment is-CH 3 、
Any one of (1), R in the second segment 1 The group being-CH 3 、-CH 2 Br and-CH 2 Any one of Cl.
According to some embodiments of the invention, the network polymer further comprises a third segment, the third segment being
According to some embodiments of the invention, the mass fraction of the second segment in the network polymer is between 5 wt% and 30 wt%.
According to some embodiments of the invention, the hardness of the silicone rubber film layer is 35A-85A, the tensile strength of the silicone rubber film layer is 2 MPa-20 MPa, and the normal temperature loss factor of the silicone rubber film layer is greater than or equal to 0.15.
The preparation method of the diaphragm of the sound production device according to the second aspect of the invention comprises the following steps: adding a filler, a vulcanizing agent, a p-methylstyrene elastomer, an anti-aging agent and an auxiliary agent into a polysiloxane polymer, and mixing to obtain a mixed material; vulcanizing and molding the mixed material at high temperature to obtain a silicon rubber film layer; wherein, the polysiloxane polymer is a polymer with a chain segment I to form a main chain, and the p-methylstyrene elastomer is a polymer with a main chain comprising a chain segment II; the first chain segment is
The second chain segment is
R in the first chain segment 2 The radical being-CH 3 -H and
r of the second segment 3 The group being-CH 3 、-CH 2 Br and-CH 2 Any one of Cl.
According to some embodiments of the invention, the backbone of the p-methylstyrene elastomer further comprises: a third chain segment, wherein the third chain segment is
According to some embodiments of the invention, R in at least one of the segments one of the polysiloxane polymers 2 The radical is
According to some embodiments of the invention, the filler comprises at least one of a carbon-based material, silica, a silicate, a carbonate, a metal oxide, a metal hydroxide, a mineral whisker.
According to some embodiments of the invention, the vulcanizing agent is a peroxide.
According to some embodiments of the invention, the antioxidant comprises at least one of a ketoamine antioxidant, a diaryl secondary amine antioxidant, a p-phenylenediamine antioxidant, a hindered phenol antioxidant.
According to some embodiments of the invention, the adjuvant comprises a platinum catalyst and an inhibitor, the inhibitor being an alkynol compound.
The sound production device according to the third aspect of the present invention includes a vibration system and a magnetic circuit system matched with the vibration system, where the vibration system includes a diaphragm and a voice coil combined on one side of the diaphragm, the magnetic circuit system drives the voice coil to vibrate to drive the diaphragm to produce sound, and the diaphragm is the diaphragm according to the above embodiment of the present invention.
The sound production device according to the fourth aspect of the present invention includes a casing, and a magnetic circuit system and a vibration system that are disposed in the casing, where the vibration system includes a voice coil, a first diaphragm, and a second diaphragm, a top of the voice coil is connected to the first diaphragm, the magnetic circuit system drives the voice coil to vibrate to drive the first diaphragm to produce sound, two ends of the second diaphragm are respectively connected to the casing and a bottom of the voice coil, and the second diaphragm is the diaphragm according to the above embodiment of the present invention.
According to the vibrating diaphragm of the sound production device provided by the embodiment of the invention, the silicon rubber film layer contains the reticular polymer, the reticular polymer comprises the first chain segment and the second chain segment, and when the second chain segment is
And in the process, the large steric effect is achieved, and the damping of the vibrating diaphragm can be improved. When it is secondThe chain segment is
Or alternatively
In the process, the steric hindrance effect is achieved, the action of the inducing force and the orienting force in the intermolecular acting force is increased, the movement of a molecular chain is limited, and the damping performance of the vibrating diaphragm is improved. The silicon rubber rete can show modulus, tensile strength and the tear strength that promotes the silicon rubber rete through containing the second chain segment to because the silicon rubber rete has higher modulus, thickness can corresponding attenuate in the vibrating diaphragm design, the vibrating diaphragm quality reduces, and can promote the intermediate frequency sensitivity of silicon rubber vibrating diaphragm.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a graph showing the results of the modulus and loss factor tests according to comparative examples and examples of the present invention;
fig. 2 is a graph illustrating FR curves of diaphragms according to comparative example 1 and example 2 of the present invention;
fig. 3 is a schematic view of the THD curves of the diaphragms according to comparative example 1 and example 2 of the present invention;
fig. 4 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention.
Reference numerals
A speaker vibration unit 100;
a folded ring portion 11; a ball top 12.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
The diaphragm of the sound generating apparatus according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings.
The vibrating diaphragm of the sound production device comprises a silicon rubber film layer, wherein the silicon rubber film layer contains a reticular polymer, the reticular polymer comprises a first chain segment and a second chain segment, and the first chain segment is
The second chain segment is
Wherein the R group in the first chain segment is-CH 3 、
Any one of (1), R in the second segment 1 The group being-CH 3 、-CH 2 Br and-CH 2 Any one of Cl.
Specifically, the diaphragm of the sound generating apparatus according to the embodiment of the present invention includes at least one silicon rubber film layer, that is, the diaphragm in the present application may be formed in a single-layer structure, or may be formed in a multi-layer composite structure. When the vibrating diaphragm is the single-layer structure, the vibrating diaphragm is made by the silicon rubber film layer of one deck this application promptly. When the vibrating diaphragm is multilayer composite structure, the vibrating diaphragm includes at least one deck silicon rubber rete, and the vibrating diaphragm can be formed by the silicon rubber rete of this application and the rete complex of other materials. Optionally, when the diaphragm contains multiple layers of silicon rubber film layers, the adjacent two layers of silicon rubber film layers can be arranged at intervals, namely, film layers made of other materials can be arranged between the adjacent two layers of silicon rubber film layers, naturally, the adjacent two layers of silicon rubber film layers can be arranged in a laminating manner, the arrangement can be selected according to actual use requirements, and the application is not particularly limited thereto.
Optionally, the diaphragm includes a silicon rubber film layer and other layers, and the other layers are one or more of a thermoplastic elastomer layer or an engineering plastic layer or a rubber film layer. Wherein the thermoplastic elastomer layer comprises: at least one of polyester thermoplastic elastomer, polyurethane thermoplastic elastomer, polyolefin thermoplastic elastomer, polystyrene thermoplastic elastomer, polyamide thermoplastic elastomer and polyvinyl chloride thermoplastic elastomer. Wherein the engineering plastic layer includes: the engineering plastic layer comprises at least one of polyamide, polycarbonate, polyformaldehyde, polyethylene terephthalate, polybutylene terephthalate, polyarylsulfone, polyethersulfone, polyimide, polyphenylene sulfide, polyarylate, polyphenyl ester, polyaryletherketone and polyetheretherketone. The adhesive film layer comprises at least one of an acrylic adhesive film and a silica gel adhesive film.
Wherein the first segment in the network polymer may be
The second segment in the network polymer may be
The first segment and the second segment in the network polymer may be at least one each. Due to the first chainThe number of segments and second segments can be multiple, with multiple choices for the R group in the first segment and multiple choices for the R group in the second segment 1 The groups also have a plurality of choices, the R groups in different first segments can be the same or different, and the R groups in different second segments can be the same or different 1 The groups may also be the same or different, and thus the network polymer may comprise a variety of combinations, not limited herein.
Wherein the R group in the first chain segment is-CH 3 、
R in the second segment 1 The group being-CH 3 、-CH 2 Br or-CH 2 And (4) Cl. For example, the network polymer comprises a plurality of second segments, wherein R in one of the second segments 1 The radical being-CH 3 R in yet another second segment 1 The group being-CH 2 Br, R in a further second segment 1 The group being-CH 2 Cl。
When R in the second segment 1 The group being-CH 3 And when the damping is improved, the damping is mainly improved through the steric effect of the second chain segment. That is, the second segment is
And meanwhile, the large steric hindrance effect is achieved, and the damping performance of the vibrating diaphragm can be improved.
When R in the second segment 1 The group being-CH 2 Br or-CH 2 When Cl is, -CH 2 Br and-CH 2 The polarity of the Br and Cl atoms in the Cl structure is high, that is, when the second segment is
Or
When the effect is steric hindrance, there is also an inducing force in intermolecular force andthe action of the orientation force is increased, and the movement of the molecular chain is limited, so that the damping performance of the vibrating diaphragm is improved. The silicon rubber rete can show modulus, tensile strength and the tear strength that promotes the silicon rubber rete through containing the second chain segment to because the silicon rubber rete has higher modulus, thickness can corresponding attenuate in the vibrating diaphragm design, the vibrating diaphragm quality reduces, and can promote the intermediate frequency sensitivity of silicon rubber vibrating diaphragm.
According to one embodiment of the present application, the network polymer further comprises a third segment, and the third segment is
That is, the network polymer has a first segment, a second segment and a third segment, the third segment being
The damping can be increased.
In some embodiments herein, the mass fraction of the second segment in the network polymer is from 5 wt% to 30 wt%. For example, the mass fraction of the second segment is 5 wt%, 8 wt%, 9 wt%, 10 wt%, 15 wt%, 20 wt%, 25 wt%, or 30 wt%, etc. It should be noted that if the mass fraction of the second segment is greater than 30 wt%, although the damping performance will increase when the mass fraction is increased, the temperature resistance will also decrease; if the mass fraction of the second segment is less than 5 wt%, it results in low damping properties and fails to meet the use requirements of the product. Preferably, the mass fraction of the second chain segment in the reticular polymer is 10 wt% -20 wt%, and the second chain segment in the numerical range is favorable for comprehensively considering the damping performance and the temperature resistance, so that the comprehensive practical performance of the vibrating diaphragm can be improved.
In some embodiments of the present application, the silicone rubber film layer has a hardness of 35A to 85A. That is, the hardness of the silicone rubber film layer can be selected according to the requirements of the diaphragm performance during the preparation process, the number and the proportion of the chain segments can be adjusted, or the hardness of the silicone rubber film layer can be changed by adding additives and the like, so that the hardness of the silicone rubber film layer can be selected from 35A to 85A, for example, the hardness of the silicone rubber film layer is 35A, 40A, 45A, 50A, 60A, 70A, 75A, 80A or 85A and the like. By adopting the hardness in the range of 35A-85A, the required rigidity and elasticity of the diaphragm can be better met, and the using effect of the loudspeaker is ensured.
Optionally, the tensile strength of the silicone rubber film layer is 2MPa to 20MPa, and can be specifically adjusted according to the requirements of the diaphragm, for example, 2MPa, 3MPa, 4MPa, 5MPa, 6MPa, 7MPa, 8MPa, 9MPa, 10MPa, 15MPa, or 20MPa, and the like. The tensile strength of the silicon rubber film layer is 2 MPa-20 MPa, so that the vibrating diaphragm has certain elasticity, certain rigidity can be guaranteed, the problems of film breaking and film folding are not prone to occurring, and the service life of the loudspeaker is prolonged.
Optionally, the normal temperature loss factor of the silicone rubber film layer is greater than or equal to 0.15, for example, the loss factor may be 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, or 0.21. By adopting the normal temperature loss factor silicon rubber film layer in the range, the performance of the vibrating diaphragm can be optimized, and the vibration THD of the silicon rubber film layer is obviously reduced. Generally, the higher the loss factor is, the better the damping performance of the material is, and the improvement of the damping performance of the vibrating diaphragm material is beneficial to reducing the polarization in the vibration process, reducing the product distortion and improving the listening yield.
The application also provides a preparation method of the vibrating diaphragm of the sound production device, which comprises the following steps: adding a filler, a vulcanizing agent, a p-methylstyrene elastomer, an anti-aging agent and an auxiliary agent into a polysiloxane polymer, and mixing to obtain a mixed material; and vulcanizing and molding the mixed material at high temperature to obtain the silicon rubber film layer.
Wherein, the polysiloxane polymer is a polymer with a chain segment I as a main chain, and the p-methylstyrene elastomer is a polymer with a main chain comprising a chain segment II;
the first chain segment is
The second chain segment is
R in segment one 2 The group being-CH 3 -H and
any one of the above-mentioned (a) and (b),
r of the second chain segment 3 The group being-CH 3 、-CH 2 Br and-CH 2 Any one of Cl.
In other words, the preparation method of the diaphragm of the sound generating device according to the embodiment of the invention may include preparing a silicon rubber film layer, and then preparing the diaphragm through the silicon rubber film layer. For example, a filler, a vulcanizing agent, a p-methylstyrene elastomer, an anti-aging agent and other additives are added to a polysiloxane polymer, and the mixture is uniformly mixed and thermally vulcanized to form the diaphragm of the silicone rubber film layer.
Wherein, the polysiloxane polymer is a polymer with a chain segment I as a main chain, and the p-methylstyrene elastomer is a polymer with a main chain comprising a chain segment II; the first chain segment is
The second chain segment is
R in segment one 2 The group being-CH 3 -H or
R of the second chain segment 3 The group being-CH 3 、-CH 2 Br or-CH 2 And (4) Cl. For example, the backbone of a p-methylstyrene elastomer comprises a plurality of segments one, R in one segment one 2 The group being-CH 3 R in another segment 2 The radical being-H, R in one of the further segments 2 The radical is
Due to R in the second chain segment 3 The radical being-CH 3 、-CH 2 Br or-CH 2 Cl, so that the silicone rubber film layer obtained by reacting the polysiloxane polymer with the p-methylstyrene elastomer contains
Or
When the second segment is
And in the process, the large steric effect is achieved, and the damping of the vibrating diaphragm can be improved. When the second segment is
Or alternatively
In the process, the steric hindrance effect is achieved, the action of the inducing force and the orienting force in the intermolecular acting force is increased, the movement of the molecular chain is limited, and the damping effect is improved.
Therefore, the modulus, the tensile strength and the tearing strength of the silicon rubber film layer can be obviously improved by preparing the silicon rubber film layer by adopting the p-methylstyrene elastomer, and the long-term vibration service life of the vibrating diaphragm is met; and the damping performance of the silicon rubber film layer is obviously improved. Because the silicon rubber film layer has higher modulus, the thickness can be correspondingly thinned in the design of the vibrating diaphragm, the quality of the vibrating diaphragm is reduced, and the medium-frequency sensitivity of the silicon rubber vibrating diaphragm can be improved.
Alternatively, the silicone rubber film layer can be uniformly mixed by adding the p-methylstyrene elastomer, the vulcanizing agent, the filler and other auxiliaries into the polysiloxane polymer by using an open mill or an internal mixer. Then vulcanizing and shaping the silicon rubber film layer at high temperature to form the vibrating diaphragm, and assembling the vibrating diaphragm into the sound generating device. For example, the polysiloxane polymer, the p-methylstyrene elastomer, the reinforcing filler and the antioxidant are first mixed uniformly by an open mill or an internal mixer, and finally, the mixture is mixed uniformly at a low temperature after the vulcanizing agent, the catalyst and the inhibitor are added. And then, a mould pressing or injection molding process is adopted, the silicon rubber membrane layer is subjected to thermal crosslinking and is solidified into a vibrating membrane structure, and then the loudspeaker module is assembled.
According to an embodiment of the present application, the polysiloxane polymer may include at least one of methyl silicone rubber raw rubber, methyl vinyl silicone rubber raw rubber, methyl phenyl vinyl silicone rubber raw rubber, methyl trifluoropropyl vinyl silicone rubber raw rubber, hydrogen-containing silicone oil.
In some specific embodiments of the present application, the molecular weight of the polysiloxane polymer is 5000-2000000, and if the molecular weight is less than 5000, the polysiloxane has high viscosity and is difficult to mix, and the vulcanized rubber has high self-adhesion after vulcanization, which makes the diaphragm difficult to turn around. If the molecular weight is more than 2000000, the resulting silicone has poor plasticity and mixing difficulty.
According to one embodiment of the present application, the polysiloxane polymer is present in the starting material in a mass fraction of 50% to 90%. If the proportion of the raw rubber is too small, the low-temperature resistance of vulcanized silicone rubber is poor, so that the vibrating diaphragm fails in the low-temperature reliability verification, the rebound resilience is poor, and the vibrating diaphragm is easy to generate unrecoverable deformation in the long-term vibration process to cause failure; if the mass fraction of the raw rubber is too large, the mass fraction of other corresponding components is reduced, which can cause the overall performance of the silicone rubber to be poor.
In some embodiments of the present application, the mass fraction of the p-methylstyrene elastomer in the starting material is from 5% to 30%. If the mass fraction of the p-methylstyrene elastomer is too low, the effects of improving the damping, stretching and tearing strength of the silicone rubber cannot be achieved; if the temperature resistance of the p-methylstyrene elastomer is lower than that of the silicone rubber, excessive addition will cause the temperature resistance of the silicone rubber to decrease.
According to one embodiment of the present application, the backbone of the p-methylstyrene elastomer further comprises segment three, wherein segment three is
That is, the p-methylstyrene elastomer is a polymer having a main chain composed of a second segment and a third segment. The main chain comprises the third chain segment, so that the damping of the diaphragm can be increased.
In some embodiments of the present application, R in at least one segment of the polysiloxane polymer is 2 The radical is
That is, the polysiloxane polymer comprises at least one segment one, R of which 2 The radical is
For example, the polysiloxane polymer comprises a plurality of segments one, wherein R of one segment one 2 The group being-CH 3 R of another segment one 2 The radical being-H, R of a further segment one 2 The radical is
R of another chain segment one 2 The radical is
R of another chain segment one 2 The radical is
By R 2 Radical adoption
The steric hindrance can be increased.
According to one embodiment of the present application, the filler includes at least one of a carbon-based material, silica, silicate, carbonate, metal oxide, metal hydroxide, mineral whisker, and the like. It should be noted that, the molecular chain flexibility of the polysiloxane polymer is high, the glass transition temperature is generally lower than-30 ℃, if no filler is added, the modulus of the vulcanized rubber is generally between 0.5MPa and 3MPa, the manufactured diaphragm has high compliance and poor stiffness, and the diaphragm is easy to generate polarization in the large-amplitude vibration process, which leads to product distortion. The filler has high hardness, high modulus and good temperature resistance, and can obviously improve the hardness, modulus, tensile strength, temperature resistance and damping performance of the rubber. The carbon material, the silicon dioxide, the silicate, the carbonate, the metal oxide, the metal hydroxide and other fillers have good reinforcing effects, wherein the carbon material comprises carbon black, graphite, graphene, carbon nano tubes and the like, and the silicon dioxide comprises gas phase method silicon dioxide, precipitation method silicon dioxide and the like. The shape of the filler can be spherical, spheroidal, flaky, fibrous, whisker-shaped and the like, and the reinforcing effect of the flaky and fibrous filler is superior to that of the spherical and spheroidal filler; the smaller the particle size of the filler, the larger the specific surface area, and the better the reinforcing effect.
According to an embodiment of the application, the mass fraction of the filler is 1% -40%, when the mass fraction of the filler is too small, the reinforcing effect on rubber is poor, the modulus of vulcanized rubber is small, the temperature resistance is poor, and the vibrating diaphragm is easy to polarize in a large-amplitude vibration process to cause distortion.
In some embodiments herein, the vulcanizing agent is a peroxide. The vulcanizing agent includes at least one of 2, 4-dichlorobenzoyl peroxide, benzoyl peroxide, dicumylbenzoyl, 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide, di-tert-butyl peroxide and the like. By using a peroxide as the curing agent, the reaction of the silicone polymer and the p-methylstyrene elastomer is facilitated. Optionally, the addition amount of the vulcanizing agent is 0.5-2%.
According to one embodiment of the present application, the antioxidant comprises at least one of a ketoamine antioxidant, a diaryl secondary amine antioxidant, a p-phenylenediamine antioxidant, and a hindered phenol antioxidant. For example, anti-aging agents may include: at least one of age inhibitor 1010, age inhibitor N-445, age inhibitor 246, age inhibitor 4010, age inhibitor SP, age inhibitor RD, age inhibitor ODA, age inhibitor OD and age inhibitor WH-02. The anti-aging agent can prevent or inhibit the formation of free radicals, thereby avoiding the chain reaction of rubber molecules, and the substance for delaying the aging of rubber obviously prolongs the service life of rubber in the use environment. The modified silicon rubber diaphragm is easy to age and degrade in the high-temperature reliability process, and the thermal aging performance of the modified silicon rubber can be improved by adding the anti-aging agent. Alternatively, the addition amount of the antioxidant is 0.5 wt% to 2 wt%, for example, the addition amount of the antioxidant is 0.5 wt%, 0.6 wt%, 1.0 wt%, 1.5 wt%, or 2 wt%, and if the addition amount of the antioxidant is less than 0.5 wt%, the aging property of the rubber tends to be lowered; if the addition amount of the anti-aging agent is more than 2 wt%, the comprehensive performance of the rubber is easily influenced, and the rubber cost is increased.
In some embodiments of the present application, the promoter comprises a platinum catalyst. The platinum catalyst mainly comprises three types: the first type is: chloroplatinic acid (H) 2 PtCl 6 ·6H 2 O) is dissolved in organic solvents such as ethanol, isopropanol, tetrahydrofuran and the like, and the organic solvents interact with each other to form a complex, which is called as a Speier catalyst, and the catalyst is simple, convenient and quick to manufacture and convenient to use; the second type: the platinum catalyst is a complex of platinum and a vinyl double-end socket, is called as a Karstedt catalyst (Karstedt's catalyst), has high reaction activity, can be stably stored, has good compatibility with various types of polysiloxane, and is the catalyst which is most widely applied to addition type organosilicon release agents; the third type: the platinum catalyst is used as a catalyst, wherein chloroplatinic acid forms a complex with other unsaturated compounds, ketones, cyclopentadiene, esters, alcohols, crown ethers, heteroatom-containing crown ethers, polysiloxane and the like.
According to one embodiment of the application, the adjuvant comprises an inhibitor. Optionally, the inhibitor is an alkynol compound comprising at least one of 3-methyl-1-butyn-3-ol, 3-methyl-1-pentyn-3-ol, 3, 5-dimethyl-1-hexyn-3-ol, 1-ethynyl-1-cyclohexanol, and 3-phenyl-1-butyn-3-ol. Alternatively, the inhibitor may be added in an amount of 0.01 wt% to 0.1 wt%, for example 0.01 wt%, 0.02 wt%, 0.05 wt%, 0.08 wt%, or 0.1 wt%, etc.
The invention also discloses a sound production device, which comprises a vibration system and a magnetic circuit system matched with the vibration system, wherein the vibration system comprises a vibrating diaphragm and a voice coil combined on one side of the vibrating diaphragm, the magnetic circuit system drives the voice coil to vibrate so as to drive the vibrating diaphragm to produce sound, and the vibrating diaphragm is the vibrating diaphragm of any one of the embodiments.
The invention also discloses a sound production device, which comprises a shell, and a magnetic circuit system and a vibration system which are arranged in the shell, wherein the vibration system comprises a voice coil, a first vibration film and a second vibration film, the top of the voice coil is connected with the first vibration film, the magnetic circuit system drives the voice coil to vibrate so as to drive the first vibration film to produce sound, two ends of the second vibration film are respectively connected with the shell and the bottom of the voice coil, and the second vibration film is the vibration film of any one of the embodiments.
The diaphragm provided by the invention can form a sound production device with any structure, such as the following typical sound production devices: the vibration system comprises a vibrating diaphragm and a voice coil combined on one side of the vibrating diaphragm. When the sound generating device works, the voice coil can vibrate up and down to drive the vibrating diaphragm to vibrate under the action of the magnetic field force of the magnetic circuit system after being electrified, and the vibrating diaphragm can generate sound during vibration.
According to another embodiment of the present invention, the sound generating device may include a casing, and a magnetic circuit system and a vibration system disposed in the casing, the vibration system may include a voice coil, a first diaphragm, and a second diaphragm, a top of the voice coil is connected to the first diaphragm, the magnetic circuit system drives the voice coil to vibrate to drive the first diaphragm to generate sound, and two ends of the second diaphragm are respectively connected to the casing and a bottom of the voice coil. The second diaphragm may be the diaphragm according to the above embodiment of the present invention.
That is, the first diaphragm may be used to vibrate and generate sound, and the second diaphragm may be used to balance the vibration of the voice coil. Particularly, when sound generating mechanism during operation, the voice coil loudspeaker voice coil can vibrate in order to drive first vibrating diaphragm vibration from top to bottom under magnetic field effect of magnetic circuit after the voice coil loudspeaker voice coil circular telegram, can carry out the sound production during first vibrating diaphragm vibration. The second vibrating diaphragm also can follow the voice coil loudspeaker voice coil and vibrate from top to bottom, because the both ends of second vibrating diaphragm link to each other with the bottom of casing and voice coil loudspeaker voice coil respectively, the vibration of voice coil loudspeaker voice coil can be balanced to the second vibrating diaphragm, can prevent that the phenomenon of polarization from appearing in the voice coil loudspeaker voice coil to can promote sound generating mechanism's sound producing effect.
It should be noted that, the first diaphragm and the second diaphragm may be both the diaphragms in the above embodiments of the present invention, or one of the first diaphragm and the second diaphragm may be the diaphragm in the above embodiments of the present invention, and the present invention is not limited to this specifically.
Further, the skilled person can make corresponding adjustments to the loudspeaker vibration unit 100 according to actual product requirements. For example, as shown in fig. 4, in a specific example of the present invention, the flexure portion 11 is protruded toward the voice coil side, the dome portion 12 is located on the lower surface of the flexure portion 11, a centering chip is added to the vibration system, and the like. The sounding vibrating diaphragm consists of a folded ring part 11 and a ball top part 12, and the vibrating diaphragm prepared by the silicon rubber film layer can be positioned on the folded ring part 11 and also can be positioned on the folded ring part 11 and the ball top part 12.
The diaphragm of the sound generating apparatus of the present invention is specifically described below with reference to specific embodiments.
Comparative example 1
100 parts of methyl vinyl silicone rubber crude rubber, 15 parts of silicon dioxide, 1 part of 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide and 0.5 part of antioxidant 1010 are used as raw materials. And forming a vibrating diaphragm material after vulcanization, and assembling into a product.
Example 1
Raw materials used were 100 parts of methyl vinyl silicone rubber crude rubber (polysiloxane polymer), 15 parts of silica (filler), 1 part of 2, 5-dimethyl-2, 5-di-t-butylperoxyhexane (vulcanizing agent), 10 parts of isobutylene-p-methylstyrene block copolymer (p-methylstyrene elastomer), and 0.5 part of antioxidant 1010 (antioxidant). And forming a vibrating diaphragm material after vulcanization, and assembling into a product.
Example 2
Raw materials used were 100 parts of methyl vinyl silicone rubber crude rubber (polysiloxane polymer), 15 parts of silica (filler), 1 part of 2, 5-dimethyl-2, 5-di-t-butylperoxyhexane (vulcanizing agent), 15 parts of isobutylene-p-methylstyrene block copolymer (p-methylstyrene elastomer), and 0.5 part of antioxidant 1010 (antioxidant). And forming a vibrating diaphragm material after vulcanization, and assembling into a product.
Example 3
Raw materials used were 100 parts of methyl vinyl silicone rubber crude rubber (polysiloxane polymer), 15 parts of silica (filler), 1 part of 2, 5-dimethyl-2, 5-di-tert-butylperoxyhexane (vulcanizing agent), 25 parts of isobutylene-p-methylstyrene block copolymer (p-methylstyrene elastomer), and 0.5 part of antioxidant 1010 (antioxidant). And forming a vibrating diaphragm material after vulcanization, and assembling into a product.
Example 4
Raw materials used were 100 parts of methyl vinyl silicone rubber crude rubber (polysiloxane polymer), 15 parts of silica (filler), 1 part of 2, 5-dimethyl-2, 5-di-tert-butylperoxyhexane (vulcanizing agent), 35 parts of isobutylene-p-methylstyrene block copolymer (p-methylstyrene elastomer), and 0.5 part of antioxidant 1010 (antioxidant). And forming a vibrating diaphragm material after vulcanization, and assembling into a product.
Wherein, the raw materials of the comparative example and the example are shown in the table one.
Table-proportioning table
The same diaphragm product of F0 was prepared for the above comparative example and example, and then the modulus, tear strength, loss factor, and the like of the diaphragm product were evaluated, and the results obtained are shown in fig. 1 to 3 and table two. Table two is the test results.
Results of the second test
As can be seen from the table I, the isobutylene-p-methylstyrene block copolymer is not contained in comparative example 1, the isobutylene-p-methylstyrene block copolymer is contained in 5 parts in example 1, and the contents of the remaining components in comparative example 1 and example 1 are the same. As can be seen from Table II, the modulus of comparative example 1 was 4.0MPa, and the modulus of the product of example 1 was 4.5 MPa. The tear strength of the product of comparative example 1 was 6.8kN/m and the tear strength of the product of example 1 was 7.3 kN/m. The loss factor for the product of comparative example 1 was 0.08 and the loss factor for the product of example 1 was 0.16. Comparing example 2, example 3 and example 4 with comparative example 1, respectively, the modulus, tear strength and loss factor of the products of example 2, example 3 and example 4 were greater than those of comparative example 1, respectively. That is, the modulus, tear strength and loss factor of the silicone rubber can be significantly improved by adding p-methylstyrene elastomer.
By comparing examples 1 to 4, the content of the isobutylene-p-methylstyrene block copolymer in example 1 was 5 parts, the content of the isobutylene-p-methylstyrene block copolymer in example 2 was 15 parts, the content of the isobutylene-p-methylstyrene block copolymer in example 3 was 25 parts, the content of the isobutylene-p-methylstyrene block copolymer in example 4 was 35 parts, and the contents of the other components in examples 1 to 4 were the same. That is, the content of the isobutylene-p-methylstyrene block copolymer gradually increases from example 1 to example 4. As can be seen from Table two, the modulus of the product of example 1 was 4.5MPa, the modulus of the product of example 2 was 6.8MPa, the modulus of the product of example 3 was 8.2MPa, and the modulus of the product of example 4 was 9.5 MPa. The tear strength of the product of example 1 was 7.3kN/m, the tear strength of the product of example 2 was 9.7kN/m, the tear strength of the product of example 3 was 11.1kN/m, and the tear strength of the product of example 4 was 13.6 kN/m. The product of example 1 had a loss factor of 0.16, the product of example 2 had a loss factor of 0.18, the product of example 3 had a loss factor of 0.19, and the product of example 4 had a loss factor of 0.22. It can be seen that as the content of the isobutylene-p-methylstyrene block copolymer increases, the modulus, tear strength and dissipation factor of the silicone rubber gradually increase.
As shown in fig. 2, the diaphragm material in example 2 has a higher modulus than that in comparative example 1, and the diaphragm can be made thinner and lighter, so that the medium frequency has higher responsiveness and higher loudness.
Comparative example 1 and example 2 were compared as shown in fig. 3. Under the condition that the diaphragm has the same F0, the higher the loss factor of the material is, the better the damping performance of the diaphragm is, the lower the low-frequency THD of the diaphragm is, and the better the acoustic performance of the diaphragm is. The loss factor of the embodiment 2 is obviously higher than that of the comparative example 1, the damping performance of the embodiment is better than that of the comparative example 1, the low-frequency THD distortion of the diaphragm is obviously reduced, and the rubber modified silicon rubber film layer diaphragm containing the p-methylstyrene elastomer has lower distortion and better acoustic performance.
In summary, the modulus, tear strength and loss factor of the silicone rubber can be significantly improved by adding the p-methylstyrene elastomer into the diaphragm of the embodiment of the present application. And the second chain segment in the vibrating diaphragm has high rigidity and steric hindrance effect, and the vibrating diaphragm is high-temperature resistant, has high damping performance, can obviously reduce the THD distortion of the silicon rubber vibrating diaphragm, and has better acoustic performance.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (13)
1. The vibrating diaphragm of the sound production device is characterized by comprising a silicon rubber film layer, wherein the silicon rubber film layer contains a reticular polymer, the reticular polymer comprises a first chain segment and a second chain segment, and the first chain segment is
The second chain segment is
Wherein the R group in the first chain segment is-CH 3 、
Any one of (1), R in the second segment 1 The radical being-CH 3 、-CH 2 Br and-CH 2 Any one of the CIs.
2. The diaphragm of claim 1, wherein the diaphragm is a single diaphragm or a plurality of diaphragmsWherein the network polymer also comprises a third chain segment, and the third chain segment is
3. The diaphragm of the sound-generating apparatus as claimed in claim 1, wherein the mass fraction of the second segment in the network polymer is 5 wt% to 30 wt%.
4. The diaphragm of the sound production device according to claim 1, wherein the hardness of the silicone rubber film layer is 35A to 85A, the tensile strength of the silicone rubber film layer is 2MPa to 20MPa, and the normal temperature loss factor of the silicone rubber film layer is greater than or equal to 0.15.
5. A preparation method of a vibrating diaphragm of a sound production device is characterized by comprising the following steps:
adding a filler, a vulcanizing agent, a p-methylstyrene elastomer, an anti-aging agent and an auxiliary agent into a polysiloxane polymer, and mixing to obtain a mixed material;
vulcanizing and molding the mixed material at high temperature to obtain a silicon rubber film layer;
wherein, the polysiloxane polymer is a polymer with a chain segment I to form a main chain, and the p-methylstyrene elastomer is a polymer with a main chain comprising a chain segment II;
the first chain segment is
The second chain segment is
R in the first chain segment 2 The group being-CH 3 -H and
any one of the above-mentioned (a) and (b),
r of the second chain segment 3 The group being-CH 3 、-CH 2 Br and-CH 2 Any one of the CIs.
6. The method of claim 5, wherein the backbone of the p-methylstyrene elastomer further comprises: and a third chain segment, wherein,
the third chain segment is
7. The method according to claim 5, wherein R in at least one of the first segments in the polysiloxane polymer is 2 The radical is
8. The method of claim 5, wherein the filler comprises at least one of a carbon-based material, silica, a silicate, a carbonate, a metal oxide, a metal hydroxide, and a mineral whisker.
9. The production method according to claim 5, wherein the vulcanizing agent is a peroxide.
10. The method according to claim 5, wherein the antioxidant comprises at least one of a ketoamine antioxidant, a diaryl secondary amine antioxidant, a p-phenylenediamine antioxidant, and a hindered phenol antioxidant.
11. The method of claim 5, wherein the promoter comprises a platinum catalyst and an inhibitor, and the inhibitor is an alkynol compound.
12. A sound producing device, comprising a vibration system and a magnetic circuit system matched with the vibration system, wherein the vibration system comprises a diaphragm and a voice coil combined on one side of the diaphragm, the magnetic circuit system drives the voice coil to vibrate to drive the diaphragm to produce sound, and the diaphragm is the diaphragm according to any one of claims 1 to 4.
13. A sound production device is characterized by comprising a shell, and a magnetic circuit system and a vibration system which are arranged in the shell, wherein the vibration system comprises a voice coil, a first vibrating diaphragm and a second vibrating diaphragm, the top of the voice coil is connected with the first vibrating diaphragm, the magnetic circuit system drives the voice coil to vibrate so as to drive the first vibrating diaphragm to produce sound, two ends of the second vibrating diaphragm are respectively connected with the shell and the bottom of the voice coil, and the second vibrating diaphragm is the vibrating diaphragm of any one of claims 1-4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210579950.9A CN114989616B (en) | 2022-05-25 | 2022-05-25 | Vibrating diaphragm of sound generating device, manufacturing method of vibrating diaphragm and sound generating device |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001059057A (en) * | 1999-08-24 | 2001-03-06 | Yokohama Rubber Co Ltd:The | Thermoplastic elastomer composition and speaker using the same |
| JP2002320290A (en) * | 2001-04-19 | 2002-10-31 | Pioneer Electronic Corp | Part for speaker and its manufacturing method |
| JP2005187719A (en) * | 2003-12-26 | 2005-07-14 | Kaneka Corp | Thermoplastic elastomer composition and molded article |
| JP2007254591A (en) * | 2006-03-23 | 2007-10-04 | Kaneka Corp | Thermoplastic elastomer composition |
| CN104782141A (en) * | 2012-11-21 | 2015-07-15 | 日东电工株式会社 | Sound-transmitting film and electronic device comprising sound-transmitting film |
| CN106221112A (en) * | 2016-08-18 | 2016-12-14 | 苏州泰斯拓伟机电设备有限公司 | A kind of modified silicon rubber heat-shrink tube and preparation method thereof |
| CN206658291U (en) * | 2016-08-22 | 2017-11-21 | 歌尔股份有限公司 | Vibrating diaphragm and the minitype acoustic generator provided with the vibrating diaphragm |
| CN107778566A (en) * | 2016-08-24 | 2018-03-09 | 中国石油天然气股份有限公司 | Composite material of isobutene/alkyl styrene polymer and emulsion polymerized styrene butadiene rubber and preparation method thereof |
| CN107778565A (en) * | 2016-08-24 | 2018-03-09 | 中国石油天然气股份有限公司 | Composite material of brominated isobutylene/alkyl styrene polymer and solution-polymerized styrene butadiene rubber and preparation method thereof |
| CN107868474A (en) * | 2017-12-15 | 2018-04-03 | 合肥工业大学 | A kind of thermally conductive silicone rubber composite material and preparation method of the wide damping temperature domain of high-damping |
| CN111935602A (en) * | 2020-09-23 | 2020-11-13 | 歌尔股份有限公司 | Vibrating diaphragm of sound production device, preparation method of vibrating diaphragm and sound production device |
| CN113402783A (en) * | 2021-06-25 | 2021-09-17 | 徐州工业职业技术学院 | Preparation method of sheet rubber anti-slip belt for tire |
| CN113490128A (en) * | 2021-06-30 | 2021-10-08 | 歌尔股份有限公司 | Vibrating diaphragm for sound production device and sound production device |
| CN113736260A (en) * | 2021-08-16 | 2021-12-03 | 歌尔股份有限公司 | Vibrating diaphragm for sound production device and sound production device |
-
2022
- 2022-05-25 CN CN202210579950.9A patent/CN114989616B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001059057A (en) * | 1999-08-24 | 2001-03-06 | Yokohama Rubber Co Ltd:The | Thermoplastic elastomer composition and speaker using the same |
| JP2002320290A (en) * | 2001-04-19 | 2002-10-31 | Pioneer Electronic Corp | Part for speaker and its manufacturing method |
| JP2005187719A (en) * | 2003-12-26 | 2005-07-14 | Kaneka Corp | Thermoplastic elastomer composition and molded article |
| JP2007254591A (en) * | 2006-03-23 | 2007-10-04 | Kaneka Corp | Thermoplastic elastomer composition |
| CN104782141A (en) * | 2012-11-21 | 2015-07-15 | 日东电工株式会社 | Sound-transmitting film and electronic device comprising sound-transmitting film |
| CN106221112A (en) * | 2016-08-18 | 2016-12-14 | 苏州泰斯拓伟机电设备有限公司 | A kind of modified silicon rubber heat-shrink tube and preparation method thereof |
| CN206658291U (en) * | 2016-08-22 | 2017-11-21 | 歌尔股份有限公司 | Vibrating diaphragm and the minitype acoustic generator provided with the vibrating diaphragm |
| CN107778566A (en) * | 2016-08-24 | 2018-03-09 | 中国石油天然气股份有限公司 | Composite material of isobutene/alkyl styrene polymer and emulsion polymerized styrene butadiene rubber and preparation method thereof |
| CN107778565A (en) * | 2016-08-24 | 2018-03-09 | 中国石油天然气股份有限公司 | Composite material of brominated isobutylene/alkyl styrene polymer and solution-polymerized styrene butadiene rubber and preparation method thereof |
| CN107868474A (en) * | 2017-12-15 | 2018-04-03 | 合肥工业大学 | A kind of thermally conductive silicone rubber composite material and preparation method of the wide damping temperature domain of high-damping |
| CN111935602A (en) * | 2020-09-23 | 2020-11-13 | 歌尔股份有限公司 | Vibrating diaphragm of sound production device, preparation method of vibrating diaphragm and sound production device |
| WO2022062813A1 (en) * | 2020-09-23 | 2022-03-31 | 歌尔股份有限公司 | Diaphragm of sound generating device, preparation method therefor, and sound generating device |
| CN113402783A (en) * | 2021-06-25 | 2021-09-17 | 徐州工业职业技术学院 | Preparation method of sheet rubber anti-slip belt for tire |
| CN113490128A (en) * | 2021-06-30 | 2021-10-08 | 歌尔股份有限公司 | Vibrating diaphragm for sound production device and sound production device |
| CN113736260A (en) * | 2021-08-16 | 2021-12-03 | 歌尔股份有限公司 | Vibrating diaphragm for sound production device and sound production device |
Non-Patent Citations (1)
| Title |
|---|
| 张阳等: "聚砜-硅橡胶富氧膜的制备", 《膜科学与技术》, pages 235 - 236 * |
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