CN114989619B - Vibrating diaphragm of sound generating device, manufacturing method of vibrating diaphragm and sound generating device - Google Patents
Vibrating diaphragm of sound generating device, manufacturing method of vibrating diaphragm and sound generating device Download PDFInfo
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- CN114989619B CN114989619B CN202210579905.3A CN202210579905A CN114989619B CN 114989619 B CN114989619 B CN 114989619B CN 202210579905 A CN202210579905 A CN 202210579905A CN 114989619 B CN114989619 B CN 114989619B
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- voice coil
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- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims abstract description 19
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 19
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 19
- 125000000725 trifluoropropyl group Chemical group [H]C([H])(*)C([H])([H])C(F)(F)F 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 13
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 81
- 239000004945 silicone rubber Substances 0.000 claims description 63
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- 229920005601 base polymer Polymers 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 239000012752 auxiliary agent Substances 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 12
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 12
- 239000003431 cross linking reagent Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 229920000098 polyolefin Polymers 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 150000003961 organosilicon compounds Chemical class 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 150000002978 peroxides Chemical group 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 229910052570 clay Inorganic materials 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical compound [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- AQYSYJUIMQTRMV-UHFFFAOYSA-N hypofluorous acid Chemical compound FO AQYSYJUIMQTRMV-UHFFFAOYSA-N 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 3
- UUEVFMOUBSLVJW-UHFFFAOYSA-N oxo-[[1-[2-[2-[2-[4-(oxoazaniumylmethylidene)pyridin-1-yl]ethoxy]ethoxy]ethyl]pyridin-4-ylidene]methyl]azanium;dibromide Chemical compound [Br-].[Br-].C1=CC(=C[NH+]=O)C=CN1CCOCCOCCN1C=CC(=C[NH+]=O)C=C1 UUEVFMOUBSLVJW-UHFFFAOYSA-N 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 3
- 229910052623 talc Inorganic materials 0.000 claims description 3
- 229910007991 Si-N Inorganic materials 0.000 claims description 2
- 229910006294 Si—N Inorganic materials 0.000 claims description 2
- 150000002009 diols Chemical class 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 238000002360 preparation method Methods 0.000 abstract description 4
- 229920000260 silastic Polymers 0.000 abstract 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 42
- 239000010410 layer Substances 0.000 description 36
- 230000000052 comparative effect Effects 0.000 description 18
- 238000012360 testing method Methods 0.000 description 18
- 238000012797 qualification Methods 0.000 description 14
- 229920001187 thermosetting polymer Polymers 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 7
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000003112 inhibitor Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000012763 reinforcing filler Substances 0.000 description 5
- JGHTXIKECBJCFI-UHFFFAOYSA-N trifluoro(propyl)silane Chemical compound CCC[Si](F)(F)F JGHTXIKECBJCFI-UHFFFAOYSA-N 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 3
- 229910018557 Si O Inorganic materials 0.000 description 3
- 239000002313 adhesive film Substances 0.000 description 3
- 229920006351 engineering plastic Polymers 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 125000000304 alkynyl group Chemical group 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000005426 magnetic field effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920006260 polyaryletherketone Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229920006345 thermoplastic polyamide Polymers 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- 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
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- 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
- H04R7/12—Non-planar diaphragms or cones
-
- 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
- H04R7/12—Non-planar diaphragms or cones
- H04R7/127—Non-planar diaphragms or cones dome-shaped
-
- 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
- C08J2383/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; 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
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application discloses sound generating apparatus's vibrating diaphragm and preparation method, sound generating apparatus, this vibrating diaphragm includes the silastic rete, the silastic rete contains netted polymer, netted polymer includes first chain segment, second chain segment and/or third chain segment, first chain segment isThe second chain segment isThe third chain segment isWherein R in the first segment 1 The radicals being methyl, ethyl, trifluoropropyl or phenyl, R 2 The radical being hydrogen, methyl, ethyl, trifluoropropyl or phenyl, R in the second segment 3 The radicals are-H, -CH 3 Or- (CH) 2 ) 5 CH 3 ，R 4 The radicals are-H, -CH 3 Or- (CH) 2 ) 5 CH 3 . The vibrating diaphragm of this application has the second chain segment, because the C-C main chain density of second chain segment is little, consequently the density of the vibrating diaphragm that contains the second chain segment is little, and tensile strength is big, and sounding sensitivity is high.
Description
Technical Field
The application relates to the electroacoustic technical field, in particular to a vibrating diaphragm of a sound generating device, a preparation method thereof and the sound generating device using the vibrating diaphragm.
Background
At present, in order to ensure the waterproof test qualification rate of the loudspeaker, silicone rubber is commonly used as a vibrating diaphragm material in some loudspeakers with waterproof requirements. However, because the tensile strength of silicone rubber is low, when the silicone rubber is applied to some fields with high waterproof grade requirements, problems such as membrane rupture and the like often occur in a diaphragm made of the silicone rubber.
And, since the density of the raw silicone rubber containing or not containing fluorine is 0.98g/cm 3 The tensile strength of the vulcanized raw rubber cannot meet the application requirements. Therefore, in the production of the diaphragm, fillers are added to the raw materials for reinforcement. However, the filler added increases the density of the diaphragm, resulting in a decrease in sensitivity of the diaphragm, thereby affecting acoustic performance.
Therefore, a new solution is needed to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a vibrating diaphragm of a sound production device, which can solve the problems of poor waterproof property and low sensitivity of the vibrating diaphragm prepared from a silicon rubber material in the prior art.
Another object of the present invention is to provide a method for preparing the above-mentioned diaphragm.
Still another object of the present invention is to provide a sound generating apparatus comprising the above-mentioned diaphragm.
In order to achieve the above object, the present invention provides the following technical solutions.
According to the vibrating diaphragm of the sound generating device, which is an embodiment of the first aspect of the invention, the vibrating diaphragm comprises a silicon rubber film layer, the silicon rubber film layer contains a netlike polymer, and the netlike polymer comprises a first chain segment and a second chain segmentA chain segment and/or a third chain segment, wherein the first chain segment isThe second chain segment is->The third chain segment isWherein R in the first segment 1 The radicals being methyl, ethyl, trifluoropropyl or phenyl, R 2 The radical being hydrogen, methyl, ethyl, trifluoropropyl or phenyl, R in the second segment 3 The radicals are-H, -CH 3 Or- (CH) 2 ) 5 CH 3 ，R 4 The radical being-H, -CH 3 Or- (CH) 2 ) 5 CH 3 。
According to some embodiments of the invention, R 3 Radicals and R 4 The second segment whose groups are simultaneously-H accounts for less than 80% of the total amount of the second segment.
According to some embodiments of the invention, the tensile strength of the silicone rubber film layer is 5MPa to 20MPa.
According to some embodiments of the invention, the thickness of the silicone rubber film layer is 30 μm to 250 μm.
According to the preparation method of the vibrating diaphragm of the sound generating device, the embodiment of the second aspect of the application comprises the following steps: adding filler, olefin copolymer and auxiliary agent into a base polymer which is silicon rubber, and mixing to obtain a mixed material; and molding the mixed material to obtain the silicon rubber film layer of the vibrating diaphragm.
According to some embodiments of the invention, the silicone rubber is a linear random polymer comprising a backbone of segment one and/or segment two, and terminated with side chain groups, the segment one beingThe second chain segment isWherein R in the segment one 5 The radicals being methyl, ethyl, trifluoropropyl or phenyl, R 6 The group is hydrogen, methyl, ethyl, trifluoropropyl or phenyl, R in the chain segment II 7 The group is methyl, ethyl, trifluoropropyl or phenyl.
According to some embodiments of the invention, the olefin copolymer includes a segment three and/or a segment four, the segment three beingR in the segment III 8 The radical being-H or-CH 3 -(CH 2 ) 5 CH 3 ，R 9 The radical being-H, -CH 3 Or- (CH) 2 ) 5 CH 3 The segment four is +.>
According to some embodiments of the invention, the olefin copolymer has a density of less than 0.95g/cm 3 。
According to some embodiments of the invention, the auxiliary agent comprises a cross-linking agent, which is a peroxide.
According to some embodiments of the invention, the cross-linking agent has the molecular structural formula R 10 -O-O-R 10 Wherein R is 10 The radicals being
According to some embodiments of the invention, the adjunct comprises a catalyst that is a compound or complex containing elemental platinum and an inhibitor that is an alkynol compound.
According to some embodiments of the invention, the filler is silica, surface modified silica, mica, graphene, clay, calcium carbonate,Carbon nanotubes, kaolin, ferric oxide, and SnO 2 、CeO 2 And talc.
According to some embodiments of the invention, the auxiliary agent comprises a structure controlling agent that is at least one of a glycol, a diorganocyclic silyl ether, a diorganodiol, an alkoxysilane, a hydroxyl fluorine-containing silicone oil, an organosilicon compound containing Si-N bonds, and an organosilicon compound containing Si-O-B bonds.
According to some embodiments of the invention, the mixture is kneaded to form a silicone compound, and the silicone compound is molded, injection molded, or air-pressure molded to form the silicone rubber film layer.
According to the embodiment of the third aspect of the invention, the sound generating device 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 generate sound, and the vibrating diaphragm is the vibrating diaphragm according to the embodiment of the invention.
According to the sound generating device, the sound generating device 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 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 generate sound, two ends of the second vibrating diaphragm are respectively connected with the bottom of the shell and the bottom of the voice coil, and the second vibrating diaphragm is the vibrating diaphragm according to the embodiment of the invention.
According to the vibrating diaphragm of the sound production device, the density of the C-C main chain in the second chain segment is smaller than that of the Si-O main chain in the first chain segment, so that compared with the existing silicone rubber, the density of the silicone rubber film layer containing the second chain segment is reduced, and the content of the filler in the vibrating diaphragm is reduced, so that the sound production sensitivity of the vibrating diaphragm is improved.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a comparative table of tensile strength of diaphragms according to comparative examples and examples of the present invention;
FIG. 2 is a comparative table of waterproof test qualification rate of diaphragms according to comparative examples and examples of the present invention;
FIG. 3 is a partial cross-sectional view of a sound emitting device according to a comparative example and embodiment of the present invention;
fig. 4 is a schematic structural view of a sound emitting device according to a comparative example and an embodiment of the present invention.
Reference numerals
A speaker vibration unit 100;
a diaphragm 10; a folded ring portion 11; a ball top 12;
and a voice coil 20.
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, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one 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 specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The diaphragm of the sound generating device according to the embodiment of the present invention is specifically described below with reference to the accompanying drawings.
According to the vibrating diaphragm of the sound generating device, which is disclosed by the embodiment of the invention, the vibrating diaphragm comprises a silicon rubber film layer, the silicon rubber film layer contains a netlike polymer, the netlike polymer comprises a first chain segment, a second chain segment and/or a third chain segment, and the first chain segment isThe second chain segment is->The third chain segment is->Wherein R in the first segment 1 The radicals being methyl, ethyl, trifluoropropyl or phenyl, R 2 The radical being hydrogen, methyl, ethyl, trifluoropropyl or phenyl, R in the second segment 3 The radicals are-H, -CH 3 Or- (CH) 2 ) 5 CH 3 ，R 4 The radical being-H, -CH 3 Or- (CH) 2 ) 5 CH 3 。
In other words, the diaphragm of the sound generating device according to the embodiment of the present invention includes at least one silicone 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 diaphragm is of a single-layer structure, i.e. the diaphragm is made of one silicone rubber film layer of the present application. When the vibrating diaphragm is multilayer composite structure, the vibrating diaphragm includes at least one deck silicone rubber rete, and the vibrating diaphragm can be formed by the rete complex of silicone rubber rete and other materials of this application. Optionally, when containing multilayer silicone rubber rete in the vibrating diaphragm, can set up at the interval between two-layer silicone rubber rete that neighbor, can also set up the rete of other materials between two-layer silicone rubber rete that neighbor promptly, of course also can laminate the setting between two-layer silicone rubber rete that neighbor, can select the setting according to actual user demand, this application does not do specific limitation for this.
Optionally, the diaphragm comprises a silicone rubber film layer and other material layers, and the other material layers are one or more of thermoplastic elastomer layers or engineering plastic layers or adhesive film layers. Wherein the thermoplastic elastomer layer comprises: at least one of a polyester thermoplastic elastomer, a polyurethane thermoplastic elastomer, a polyolefin thermoplastic elastomer, a polystyrene thermoplastic elastomer, a polyamide thermoplastic elastomer, and a polyvinyl chloride thermoplastic elastomer. Wherein the engineering plastic layer comprises: the engineering plastic layer comprises at least one of polyamide, polycarbonate, polyformaldehyde, polyethylene terephthalate, polybutylene terephthalate, polyarylsulfone, polyether sulfone, polyimide, polyphenylene sulfide, polyarylate, polyphenyl ester, polyaryletherketone and polyether etherketone. The adhesive film layer comprises at least one of an acrylic adhesive film and a silica gel adhesive film.
Wherein, the network polymer at least comprises a first chain segment and a second chain segment, and the network polymer in this embodiment may include the following cases: in the first case, the network polymer contains a first segment, a second segment and a third segment; in case two, the network polymer contains both the first segment and the second segment, and does not contain the third segment. Wherein the third chain segment is
In addition, the first chain segment isR in the first segment 1 The radicals being methyl, ethyl, trifluoropropyl or phenyl, R 2 The group is hydrogen, methyl, ethyl, trifluoropropyl or phenyl. Wherein R in the same first segment 1 Radicals and R 2 The groups may be the same or different. When the network polymer contains a plurality of first segments, R in different first segments 1 Radicals and R 2 The groups may be the same or different and are not limited herein.
The second chain segment isR in the second segment 3 The radicals are-H, -CH 3 Or- (CH) 2 ) 5 CH 3 ，R 4 The radical being-H, -CH 3 Or- (CH) 2 ) 5 CH 3 Wherein R in the same second segment 3 Radicals and R 4 The groups may be the same or different. When the network polymer contains a plurality of second segments, R in different second segments 3 Radicals and R 4 The groups may be the same or different and are not limited herein.
Due to R in the first segment 1 Radicals and R 2 The radicals having a plurality of choices, R in the second segment 3 Radicals and R 4 The groups also have a variety of options and may or may not include a third segment, and thus the network polymer may include a variety of combinations, which are not described in detail herein.
It should be noted that, because the density of the C-C main chain in the second chain segment is smaller than that of the Si-O main chain in the first chain segment, compared with the existing silicone rubber, the density of the silicone rubber film layer containing the second chain segment is smaller, and the content of the filler in the diaphragm is reduced, so that the sounding sensitivity of the diaphragm is improved.
According to one embodiment of the present application, R 3 Radicals and R 4 The second chain segment with the group of-H accounts for less than 80% of the total amount of the second chain segment. For example, a plurality of second segments are contained in the network polymer, wherein a portion of the second segments R 3 Radicals and R 4 The groups are simultaneously-H, and the total amount of the second chain segments of the part accounts for less than 80% of the total amount of all the second chain segments in the network polymer. If R is 3 Radicals and R 4 The second chain segment with the group of-H accounting for more than 80 percent of the total amount of the second chain segment can lead to high crystallinity and reduced elongation at break.
According to one embodiment of the present application, the tensile strength of the silicone rubber film layer is 5MPa-20MPa, such as 5MPa, 6MPa, 7MPa, 8MPa, 9MPa, 10MPa, 11MPa, 12MPa, 15MPa, 18MPa, 19MPa, 20MPa, etc. Because the silicone rubber film layer contains the second chain segment, the tensile strength of the silicone rubber film layer is larger. When the tensile strength of the silicon rubber film layer is in the range of 5MPa-20MPa, the diaphragm has certain elasticity, and meanwhile, certain rigidity can be ensured, the problems of film breaking and film folding are not easy to occur, and the service life of the loudspeaker is prolonged.
In some embodiments of the present application, the thickness of the silicone rubber film layer is 30 μm to 250 μm, such as 30 μm, 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, etc. Because the intensity of vulcanized rubber is lower than that of pure elastomer, certain thickness is needed to be matched in order to meet the rigidity required by vibration of the vibrating diaphragm. But too large a thickness results in a loss of vibration space of the diaphragm, and too large a thickness of the diaphragm increases the weight of the diaphragm, thereby reducing the sensitivity of the diaphragm, and therefore, the thickness of the diaphragm adopting the above range can well give consideration to rigidity, rebound resilience and damping property required for vibration of the diaphragm.
The application also discloses a preparation method of the vibrating diaphragm of the sound generating device, which comprises the following steps: adding filler, olefin copolymer and auxiliary agent into a base polymer which is silicon rubber as the base polymer, and mixing to obtain a mixed material; and molding the mixed material to obtain the silicon rubber film layer of the vibrating diaphragm.
In other words, the method for manufacturing the diaphragm of the sound generating device may include the steps of: the silicone rubber is used as a base polymer, and the filler, the olefin copolymer and the auxiliary agent are added into the base polymer, so that the silicone rubber film layer of the diaphragm can be formed by mixing and molding during mixing. Because the tensile strength of the olefin copolymer is greater than that of the silicone rubber, the tensile strength of the material is improved and the waterproof grade is improved by blending and modifying the olefin copolymer and the silicone rubber.
The silicone rubber may be a fluorosilicone rubber containing fluorine, or may be a silicone rubber containing no fluorine, and is collectively referred to as silicone rubber. Since the green density of the silicone rubber is 0.98g/cm 3 The tensile strength of the vulcanized raw rubber cannot meet the application requirement, and the existing technology for preparing the single silicon rubber needs to add enough filler for reinforcement, so that the density of the vibrating diaphragm is increased to 1.2g/cm 3 -1.5g/cm 3 The density of the diaphragm is large, which leads to the decrease of sensitivityAffecting the acoustic performance. In the application, the olefin copolymer is blended with the silicone rubber, and the density of the C-C main chain obtained by blending is smaller than that of the Si-O main chain, and the tensile strength of the olefin copolymer is larger than that of the silicone rubber, so that the strength can be improved, the density can be reduced, and the sounding sensitivity of the vibrating diaphragm can be improved by adding the olefin copolymer into the silicone rubber.
In some embodiments of the present application, the silicone rubber is a linear random polymer comprising a backbone of segments one and/or two, and terminated with side chain groups, segment one beingThe second chain segment is +.>Wherein R in segment one 5 The radicals being methyl, ethyl, trifluoropropyl or phenyl, R 6 The radical is hydrogen, methyl, ethyl, trifluoropropyl or phenyl, R in the chain segment II 7 The group is methyl, ethyl, trifluoropropyl or phenyl, preferably phenyl or trifluoropropyl.
In other words, the main chain of the silicone rubber may contain at least one of the segment one and the segment two, that is, the main chain of the silicone rubber may include the following cases: in the first case, the main chain of the silicon rubber consists of a chain segment I; in the second case, the main chain of the silicon rubber consists of a chain segment II; in the third case, the main chain of the silicone rubber consists of a chain segment I and a chain segment II. The above combinations are merely illustrative of the main chain in the silicone rubber, and do not limit the main chain to be formed by the combination of the three examples.
According to one embodiment of the present application, the olefin copolymer includes a segment III and/or a segment IV, the segment III beingR in segment three 8 The radical being-H or-CH 3 -(CH 2 ) 5 CH 3 ，R 9 The radical being-H, -CH 3 Or- (CH) 2 ) 5 CH 3 The segment four is->
In other words, the olefin copolymer may contain at least one of the segment three and the segment four, that is, the olefin copolymer may include the following cases: in the first case, the olefin copolymer is composed of a segment III; in the second case, the olefin copolymer is composed of a segment IV; in case three, the olefin copolymer contains both segment three and segment four. It should be noted that the above combinations are merely illustrative of the olefin copolymer, and do not limit the olefin copolymer to be formed by the combination of the above three examples. Optionally, ethylene propylene diene monomer, polyolefin or the like is selected as the olefin copolymer.
According to one embodiment of the present application, the olefin copolymer has a density of less than 0.95g/cm 3 Preferably, the olefin copolymer has a density of 0.8g/cm 3 -0.9g/cm 3 . Since the density of the silicone rubber is 0.98g/cm 3 Therefore, the density of the whole silicone rubber film layer can be reduced by adding the olefin copolymer with the density, and the tensile strength of the prepared silicone rubber film layer can be ensured.
In some embodiments of the present application, the auxiliary agent includes a crosslinking agent that is a peroxide, and the use of peroxide as the crosslinking agent facilitates the joining together of the silicone rubber and the olefin copolymer, etc.
According to one embodiment of the present application, the cross-linking agent has the molecular structural formula R 10 -O-O-R 10 Wherein R is 10 The radicals being Wherein the crosslinking agent is a substance which can play a bridging role between linear molecules so as to bond and crosslink a plurality of linear molecules into a network structure. The crosslinking agents referred to in this application may beKnown as "curatives", which are added to a base polymer, a linear random polymer is capable of undergoing a crosslinking reaction, i.e., after curing of the base polymer, to produce a network polymer. The reticular polymer can increase the elasticity, hardness, tensile strength, stretching strength and other properties of the rubber. The cross-linking agent can achieve the performances of elasticity, strength, tensile strength, stretching strength and the like required by the diaphragm.
According to one embodiment of the application, the auxiliary agent comprises a catalyst, wherein the catalyst is a compound or complex containing platinum, and the catalyst has high activity, high use stability and good yellowing resistance, can effectively promote the reaction and accelerate the vulcanization of the base polymer.
Optionally, the auxiliary agent also comprises an inhibitor, wherein the inhibitor is an alkynol compound, the alkynol inhibitor contains alkynyl, and can form a complex with a catalyst, and the shelf life of the catalyst is long at normal temperature. The inhibitor may act in concert with the catalyst to allow the base polymer to polymerize into a network polymer and to provide the desired strength to the diaphragm while preventing excessive polymerization.
In some embodiments of the present application, the filler is silica, surface-modified silica, mica, graphene, clay, calcium carbonate, carbon nanotubes, kaolin, ferric oxide, snO 2 、CeO 2 And talc. The silicon dioxide and the like can be used as a reinforcing agent, so that the mechanical property of the vibrating diaphragm material can be improved, and the metal oxide can improve the heat-resistant stability of the vibrating diaphragm material.
According to one embodiment of the present application, the auxiliary agent includes a structure controlling agent, which is at least one of a glycol, a diorganocyclic silyl ether, a diorganosilicon diol, an alkoxysilane, a hydroxyl fluorine-containing silicone oil, an organosilicon compound containing si—n bonds, and an organosilicon compound containing si—o—b bonds. The structure control agent can effectively control the structuring of the silicone rubber, and further ensures that the silicone rubber has good physicochemical properties.
According to one embodiment of the application, the mixture is mixed to form a silicone compound, and the silicone compound is molded, injection molded or air-pressure molded to form a silicone rubber film layer.
The application also discloses sound generating mechanism, including vibration system and with vibration system matched with magnetic circuit, vibration system includes the vibrating diaphragm and combines the voice coil loudspeaker voice coil in vibrating diaphragm one side, and magnetic circuit drive voice coil loudspeaker voice coil vibration is in order to drive the vibrating diaphragm sound production, and the vibrating diaphragm is the vibrating diaphragm of above-mentioned arbitrary embodiment.
That is, the diaphragm provided by the invention can be formed into any sound generating device, such as the following typical sound generating devices: the vibration system comprises a vibrating diaphragm and a voice coil combined on one side of the vibrating diaphragm. When the sounding device works, the voice coil can vibrate up and down under the action of the magnetic field force of the magnetic circuit system after the voice coil is electrified so as to drive the vibrating diaphragm to vibrate, and sounding can be carried out when the vibrating diaphragm vibrates.
The application also discloses sound generating mechanism, including the casing and establish magnetic circuit and vibration system in the casing, vibration system includes voice coil loudspeaker voice coil, first vibrating diaphragm and second vibrating diaphragm, and the top of voice coil loudspeaker voice coil links to each other with first vibrating diaphragm, and magnetic circuit drive voice coil loudspeaker voice coil vibration is in order to drive first vibrating diaphragm sound production, and the both ends of second vibrating diaphragm link to each other with the bottom of casing and voice coil loudspeaker voice coil respectively, and the second vibrating diaphragm is the vibrating diaphragm of any one of the above-mentioned embodiments.
That is, the first diaphragm may be used for vibration sound production and the second diaphragm may be used for balancing the vibration of the voice coil. Specifically, when sound generating mechanism during operation, the voice coil is under magnetic field effect of magnetic circuit after the voice coil loudspeaker voice coil is circular telegram, and the voice coil loudspeaker voice coil can vibrate in order to drive first vibrating diaphragm vibration from top to bottom, can carry out the sound production when first vibrating diaphragm vibrates. The second vibrating diaphragm also can follow the upper and lower vibration of voice coil, 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 voice coil loudspeaker voice coil from appearing the phenomenon of polarization to can promote sound production device's sound production effect.
It should be noted that the first diaphragm and the second diaphragm may be the diaphragms according to the above embodiments of the present invention, or one of the first diaphragm and the second diaphragm may be the diaphragm according to the above embodiments of the present invention, which is not particularly limited.
Further, those skilled in the art can make corresponding adjustments to the speaker vibration unit 100 according to the actual product requirements. For example, as shown in fig. 3 and 4, in one embodiment of the present invention, the ring-folded portion 11 is protruded toward the voice coil 20 side, the dome portion 12 is located on the lower surface of the ring-folded portion 11, and a centering support piece or the like is added to the vibration system. The sounding diaphragm 10 is composed of a folded ring part 11 and a sphere top part 12, and the diaphragm 10 prepared by blending the olefin copolymer and the silicone rubber can be positioned at the folded ring part 11, that is, the diaphragm 10 prepared by blending the olefin copolymer and the silicone rubber can be positioned at the folded ring part 11, and also can be positioned at the folded ring part 11 and the sphere top part 12.
The diaphragm of the sound generating device of the present invention will be specifically described with reference to the following embodiments.
Comparative example one a diaphragm was prepared by heating and vulcanizing after the completion of kneading, using 69.5 parts of trifluoropropyl silicone rubber as a base polymer, 30 parts of silica as a reinforcing filler, and 0.5 part of 2, 5-dimethyl-2, 5-bis (t-butylperoxy) hexane as a vulcanizing agent.
Example one vibration film was prepared by heating and vulcanizing after the completion of kneading, using 55 parts of trifluoropropyl silicone rubber as a base polymer, 28 parts of an olefin copolymer, 16.5 parts of silica as a reinforcing filler, and 0.5 part of 2, 5-dimethyl-2, 5-bis (t-butylperoxy) hexane as a vulcanizing agent.
In the second example, 40 parts of trifluoropropyl silicone rubber is used as a base polymer, 47.5 parts of olefin copolymer, 12 parts of silicon dioxide is used as a reinforcing filler, 0.5 part of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane is used as a vulcanizing agent, and after the mixing is completed, the vibrating diaphragm is prepared by heating, vulcanizing and molding.
Example three a diaphragm was prepared by heating and vulcanizing after the completion of kneading, using 25 parts of trifluoropropyl silicone rubber as a base polymer, 67 parts of an olefin copolymer, 7.5 parts of silica as a reinforcing filler, and 0.5 part of 2, 5-dimethyl-2, 5-bis (t-butylperoxy) hexane as a vulcanizing agent.
In the fourth embodiment, 15 parts of trifluoropropyl silicone rubber is used as a base polymer, 80 parts of olefin copolymer, 4.5 parts of silicon dioxide is used as a reinforcing filler, 0.5 part of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane is used as a vulcanizing agent, and after mixing, the mixture is heated and vulcanized to prepare the diaphragm.
Specifically, the proportions of the respective raw materials in comparative example one, example two, example three and example four are shown in the following table one, wherein POE (polyolefin thermoplastic elastomer) is used for the olefin copolymers in examples one to example four.
Table i, raw materials proportioning table
The samples were tested for tensile strength, density, sensitivity, and percent of pass under the same hardness conditions.
Tensile strength: tensile testing was performed using the GBT528-2009 standard and tensile rates were tested using 300 mm/min.
Density: GB/T533-91 determination of the vulcanized rubber density.
Waterproof test qualification rate: and testing the ratio of the qualified products to the unqualified products of the acoustic performance under the pressure of 5 Mpa.
The above test results of comparative example one, example one to example four are shown in the following table two.
Table II, test results comparison Table
The test results in table two were specifically analyzed, and it should be noted that the contents of the plurality of raw materials in comparative example one and examples one to four were different in order to prepare products having the same hardness.
First, comparing the first comparative example with the first example, it can be seen from table one that the first comparative example does not contain an olefin copolymer, and the first example contains both an olefin copolymer and a silicone rubber. As can be seen from Table II, the tensile strength of the product of comparative example I was 8.8MPa, and the tensile strength of the product of example I was 9.5MPa, and it was found that the tensile strength of the product of example I was greater than that of the product of comparative example I. Comparing any of the second to fourth examples with the first comparative example, it can be seen from the table two that the tensile strength of the products of the second to fourth examples is greater than that of the first comparative example. Therefore, on the basis of the consistency of Shore hardness, the tensile strength of the product obtained by the reaction of the silicon rubber and the olefin copolymer is high.
In addition, when the shore hardness of the products of the first comparative example and the first to fourth examples is 65A, the waterproof test qualification rate of the product of the first comparative example is 90%, the waterproof test qualification rate of the first example is 93%, the waterproof test qualification rate of the second example is 96%, the waterproof test qualification rate of the third example is 99%, the waterproof test qualification rate of the fourth example is 99.9%, and it is seen that the waterproof test qualification rate of the product obtained by the reaction of the silicone rubber and the olefin copolymer is high on the basis of the consistency of the shore hardness.
Finally, comparing the first to fourth examples, it can be seen from Table one that the content of the olefin copolymer in the first example was 28 parts, the content of the olefin copolymer in the second example was 47.5 parts, the content of the olefin copolymer in the third example was 67 parts, and the content of the olefin copolymer in the fourth example was 80 parts, that is, the proportion of the olefin copolymer in the total raw material in the first to fourth examples was gradually increased. As can be seen from table two, on the premise that the shore hardness of the products in examples one to four is 65A, the tensile strength of the product of example one is 9.5MPa, the tensile strength of example two is 10.9MPa, the tensile strength of example three is 13.1MPa, and the tensile strength of example four is 15.2MPa. The waterproof test qualification rate of the first embodiment is 93%, the waterproof test qualification rate of the second embodiment is 96%, the waterproof test qualification rate of the third embodiment is 99%, and the waterproof test qualification rate of the fourth embodiment is 99.9%. It can be seen that, on the premise of the same hardness, as shown in fig. 1 and 2, as the proportion of the olefin copolymer increases, the tensile strength gradually increases, and the waterproof test qualification rate of the diaphragm gradually increases.
In sum, according to the vibrating diaphragm of the sound generating device, the characteristics of high tensile strength and low density of the olefin copolymer are utilized through the reaction of the silicone rubber and the olefin copolymer, so that the density of the vibrating diaphragm is reduced, the tensile strength and the waterproof grade of the vibrating diaphragm are improved, and the sensitivity of the vibrating diaphragm is improved.
Although specific embodiments of the present application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration 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 may 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 netlike polymer prepared from silicon rubber, a polyolefin thermoplastic elastomer and an auxiliary agent, the auxiliary agent comprises a cross-linking agent, the cross-linking agent is peroxide, the netlike polymer comprises a first chain segment, a second chain segment and/or a third chain segment, and the first chain segment isThe second chain segment is->The third segment is->
Wherein R in the first segment 1 The radicals being methyl, ethyl or phenyl radicals, R 2 The radical being hydrogen, methyl, ethyl or phenyl, R in the second segment 3 The radicals are-H, -CH 3 Or- (CH) 2 ) 5 CH 3 ，R 4 The radicals are-H, -CH 3 Or- (CH) 2 ) 5 CH 3 ，R 3 Radicals and R 4 The second segment whose groups are simultaneously-H accounts for less than 80% of the total amount of the second segment.
2. The diaphragm of the sound generating apparatus of claim 1, wherein the tensile strength of the silicone rubber film layer is 5MPa to 20MPa.
3. The diaphragm of the sound generating apparatus of claim 1, wherein the thickness of the silicone rubber film layer is 30 μm to 250 μm.
4. A method of producing a diaphragm for a sound generating apparatus according to any one of claims 1 to 3, comprising the steps of:
adding filler, polyolefin thermoplastic elastomer and auxiliary agent into a base polymer which is taken as the base polymer, and mixing to obtain a mixed material;
and molding the mixed material to obtain the silicon rubber film layer of the vibrating diaphragm.
5. The method of producing a diaphragm for a sound generating apparatus according to claim 4, wherein the silicone rubber is a linear random polymer comprising a main chain composed of a segment one and/or a segment two, and terminated with a side chain group, the segment one beingThe second chain segment is->
Wherein R in the segment one 5 The radicals being methyl, ethyl, trifluoropropyl or phenyl, R 6 The group is hydrogen, methyl, ethyl, trifluoropropyl or phenyl, R in the chain segment II 7 The group is methyl, ethyl, trifluoropropyl or phenyl.
6. According to the weightsThe method of producing a diaphragm for a sound generating apparatus according to claim 4, wherein the polyolefin thermoplastic elastomer comprises a third segment and/or a fourth segment, and the third segment isR in the segment III 8 The radical being-H or-CH 3 ，-(CH 2 ) 5 CH 3 ，R 9 The radical being-H, -CH 3 Or- (CH) 2 ) 5 CH 3 The segment four is +.>
7. The method of producing a diaphragm for a sound generating apparatus according to claim 4, wherein the polyolefin thermoplastic elastomer has a density of less than 0.95g/cm 3 。
8. The method for preparing a diaphragm of a sound generating apparatus according to claim 7, wherein the molecular structural formula of the cross-linking agent is R 10 -O-O-R 10 Wherein R is 10 The radicals being
9. The method for producing a diaphragm of a sound-producing device according to claim 4, wherein the filler is silica, surface-modified silica, mica, graphene, clay, calcium carbonate, carbon nanotube, ferric oxide, snO 2 、CeO 2 And talc.
10. The method of producing a diaphragm for a sound generating apparatus according to claim 4, wherein the auxiliary agent comprises a structure controlling agent, and the structure controlling agent is at least one of a diol, a diorganocyclic silyl ether, an alkoxysilane, a hydroxyl fluorine-containing silicone oil, an organosilicon compound containing Si-N bonds, and an organosilicon compound containing Si-O-B bonds.
11. The method of claim 4, wherein the mixture is kneaded to form a silicone compound, and the silicone compound is molded, injection molded, or air-molded to form the silicone rubber film layer.
12. The utility model provides a sound generating device, its characterized in that includes vibration system and with vibration system matched with magnetic circuit system, vibration system includes the vibrating diaphragm and combines the voice coil loudspeaker voice coil of vibrating diaphragm one side, magnetic circuit system drives the voice coil loudspeaker voice coil vibrates in order to drive the vibrating diaphragm sound production, the vibrating diaphragm is the vibrating diaphragm of any one of claims 1-3.
13. The utility model provides a sound generating device, its characterized in that includes the casing and establishes magnetic circuit and vibration system in the casing, vibration system includes voice coil loudspeaker voice coil, first vibrating diaphragm and second vibrating diaphragm, the top of voice coil loudspeaker voice coil with first vibrating diaphragm links to each other, magnetic circuit drives the voice coil loudspeaker voice coil vibrates in order to drive first vibrating diaphragm sound production, the both ends of second vibrating diaphragm respectively with the casing with the bottom of voice coil loudspeaker voice coil links to each other, the second vibrating diaphragm is the vibrating diaphragm of any one of claims 1-3.
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