CN105992106A - Vibrating diaphragm of sound generating device - Google Patents
Vibrating diaphragm of sound generating device Download PDFInfo
- Publication number
- CN105992106A CN105992106A CN201610293722.XA CN201610293722A CN105992106A CN 105992106 A CN105992106 A CN 105992106A CN 201610293722 A CN201610293722 A CN 201610293722A CN 105992106 A CN105992106 A CN 105992106A
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- China
- Prior art keywords
- adhesive film
- engineering plastic
- plastic bed
- bed
- vibrating diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
Abstract
The invention relates to a vibrating diaphragm of a sound generating device. The vibrating diaphragm comprises a first engineering plastic layer, a second engineering plastic layer, and an adhesive film layer which is arranged between the first engineering plastic layer and the second engineering plastic layer. The adhesive film layer is formed by low-temperature-resistant glue through coating and curing, wherein the elastic modulus variation of the adhesive film layer from -20 DEG C to room temperature is less than 10%. The first engineering plastic layer, the adhesive film layer and the second engineering plastic layer are fit together through the composite technology. According to the vibrating diaphragm, the adhesive film is manufactured by low-temperature-resistant glue through coating and curing and then the adhesive film, the first engineering plastic layer and the second engineering plastic layer are fit together through the composite technology. According to the vibrating diaphragm, the adhesive film layer has great low temperature resistance so that the product is enabled to have great acoustic performance at low temperature, such as resonant frequency which is the same with that of normal temperature, low distortion and great sound quality.
Description
Technical field
The present invention relates to a kind of vibrating diaphragm, more particularly it relates to an in sound-producing device
Composite diaphragm.
Background technology
Along with the raising of quality of the life, consumer is more and more higher to the requirement of tonequality, and this is just to audio frequency
In system, the performance requirement of the diaphragm of loudspeaker is more and more higher.Traditional diaphragm of loudspeaker mostly is compound and shakes
Film, but, some limitation of the own process structure of these composite diaphragms make speaker acoustical quality
Not fully up to expectations.
Traditional composite diaphragm, it will usually use glued membrane to realize the bonding between multilayer film, acrylic acid
The construction features of class glued membrane determines its stability existing defects under cryogenic.When temperature is relatively low,
The hardness of acrylic compounds glued membrane becomes big, modulus rising, causes the pliable reduction of whole vibrating diaphragm, resonant frequency
F0 raises so that effectively frequency range narrows, and tonequality declines.And its damping and amortization is deteriorated so that product THD
Raising, tonequality declines.
Summary of the invention
It is an object of the present invention to provide the vibrating diaphragm of a kind of sound-producing device.
According to an aspect of the present invention, it is provided that the vibrating diaphragm of a kind of sound-producing device, including the first engineering plastic
The bed of material, the second engineering plastic bed of material, and between the first engineering plastic bed of material, the second engineering plastic bed of material
Adhesive film, described adhesive film by low temperature resistant glue application solidification form；Wherein, described adhesive film from
-20 DEG C of elastic modulus change amounts to room temperature are less than 10%；The described first engineering plastic bed of material, adhesive film,
The second engineering plastic bed of material fits together through combination process.
Preferably, the described first engineering plastic bed of material, the second engineering plastic bed of material be polyether-ether-ketone, polyarylate,
Polyetherimide, polyimides, polyphenylene sulfide, PEN, poly terephthalic acid
One in glycol ester.
According to the second aspect of the invention, it is provided that the vibrating diaphragm of a kind of sound-producing device, is included successively
The one engineering plastic bed of material, adhesive film, elastomer layer, the second engineering plastic bed of material；Described adhesive film is by resistance to low
Temperature glue application solidification forms；Wherein, described adhesive film is from the elastic modulus change amount of-20 DEG C to room temperature
Less than 10%；The described first engineering plastic bed of material, adhesive film, elastomer layer, the second engineering plastic bed of material warp
Cross combination process to fit together.
Preferably, described elastomer layer is thermoplastic polyurethanes elastomer or thermoplastic poly esters bullet
Gonosome.
According to the third aspect of the present invention, it is provided that the vibrating diaphragm of a kind of sound-producing device, is included successively
The one engineering plastic bed of material, the first adhesive film, the second engineering plastic bed of material, the second adhesive film, the 3rd engineering plastic
The bed of material；Described first adhesive film, the second adhesive film are formed by the solidification of low temperature resistant glue application；Wherein,
Described first adhesive film, the second adhesive film are less than 10% from the elastic modulus change amount of-20 DEG C to room temperature；
The described first engineering plastic bed of material, the first adhesive film, the second engineering plastic bed of material, the second adhesive film, the 3rd
The engineering plastic bed of material fits together through combination process.
According to the fourth aspect of the present invention, it is provided that the vibrating diaphragm of a kind of sound-producing device, is included successively
The one engineering plastic bed of material, the first elastomer layer, adhesive film, the second elastomer layer, the second engineering plastic bed of material；
Described adhesive film is formed by the solidification of low temperature resistant glue application；Wherein, described adhesive film from-20 DEG C to room temperature
Elastic modulus change amount less than 10%；The described first engineering plastic bed of material, the first elastomer layer, glued membrane
Layer, the second elastomer layer, the second engineering plastic bed of material fit together through combination process.
According to the fifth aspect of the present invention, it is provided that the vibrating diaphragm of a kind of sound-producing device, is included successively
The one engineering plastic bed of material, the first adhesive film, elastomer layer, the second adhesive film, the second engineering plastic bed of material；
Described first adhesive film, the second adhesive film are formed by the solidification of low temperature resistant glue application；Wherein, described
One adhesive film, the second adhesive film are less than 10% from the elastic modulus change amount of-20 DEG C to room temperature；Described
The one engineering plastic bed of material, the first adhesive film, elastomer layer, the second adhesive film, the second engineering plastic bed of material warp
Cross combination process to fit together.
The vibrating diaphragm of the present invention, is coated solidification by low temperature resistant glue, and with the in the way of adhesive film
The one engineering plastic bed of material, the second engineering plastic bed of material are fit together by combination process.The vibrating diaphragm of the present invention,
Its adhesive film resistance to low temperature is good, and product can be made the most still to have preferable acoustical behavior, as
Resonant frequency F0, relatively low distortion and the good tonequality being as good as with room temperature.
By detailed description to the exemplary embodiment of the present invention referring to the drawings, its of the present invention
Its feature and advantage thereof will be made apparent from.
Accompanying drawing explanation
The accompanying drawing of the part constituting description describes embodiments of the invention, and together with description
Together for explaining the principle of the present invention.
Fig. 1 is the profile of vibrating diaphragm the first embodiment of the present invention.
Fig. 2 is the profile of vibrating diaphragm the second embodiment of the present invention.
Fig. 3 is the profile of vibrating diaphragm the 3rd embodiment of the present invention.
Fig. 4 is the profile of vibrating diaphragm the 4th embodiment of the present invention.
Fig. 5 is the profile of vibrating diaphragm the 5th embodiment of the present invention.
Detailed description of the invention
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should also be noted that
Unless specifically stated otherwise, the parts that illustrate the most in these embodiments and step positioned opposite,
Numerical expression and numerical value do not limit the scope of the invention.
Description only actually at least one exemplary embodiment is illustrative below, never makees
For to the present invention and application thereof or any restriction of use.
May be not discussed in detail for technology and equipment known to person of ordinary skill in the relevant, but
In the appropriate case, described technology and equipment should be considered a part for description.
Shown here with in all examples discussed, any occurrence should be construed as merely example
Property rather than as limit.Therefore, other example of exemplary embodiment can have different
Value.
It should also be noted that similar label and letter represent similar terms, therefore, one in following accompanying drawing
A certain Xiang Yi the accompanying drawing of denier is defined, then need not it is carried out further in accompanying drawing subsequently
Discuss.
The present invention is to solve problems of the prior art, it is provided that the vibrating diaphragm of a kind of sound-producing device,
Described vibrating diaphragm can improve the resistance to low temperature of product while improving the strength of materials, strengthens multilamellar multiple
The stability of condensation material performance, reduces the harmonic distortion of product, maintains the stability of resonant frequency.
Embodiment 1
With reference to Fig. 1, the invention provides the vibrating diaphragm of a kind of sound-producing device, it includes the first engineering plastics
Layer 1, the second engineering plastic bed of material 3, and it is positioned at the first engineering plastic bed of material 1, the second engineering plastic bed of material 3
Between adhesive film 2, the described first engineering plastic bed of material 1, adhesive film 2, the second engineering plastic bed of material 3 warp
Cross combination process to fit together.
The first engineering plastic bed of material 1, the second engineering plastic bed of material 3 of the present invention can use people in the art
Material known to Yuan, such as polyether-ether-ketone, polyarylate, Polyetherimide, polyimides, polyphenyl
Thioether, PEN, polyethylene terephthalate etc..Skill for this area
For art personnel, the material of the first engineering plastic bed of material 1, the second engineering plastic bed of material 3 can be identical, also
Can be different, those skilled in the art can select according to actual needs.
The adhesive film of the present invention by low temperature resistant glue application solidification form, wherein it should be noted that this
The low temperature resistant glued membrane of invention refers to when subzero 20 DEG C, and the physical property of glued membrane keeps constant, refers mainly to-20 DEG C
During to room temperature, the elastic modulus change amount of glued membrane is less than 10%, specifically can be surveyed by flow graph
Examination.For a person skilled in the art, in order to obtain the glue of resistance to low temperature, can be at glue
Middle interpolation functional monomer, such as, can add polyurethane, or epoxies in esters of acrylic acid glue
Monomer, resin etc., the addition of functional monomer controls at 0.1wt%-40wt%.Specifically can pass through
Control the temperature range how many regulation glue of functional monomer addition are low temperature resistant.
The adhesive film 2 of the present invention, low temperature resistant glue is coated solidification, formed have certain thickness,
The adhesive film of intensity, the mode of coating solidification belongs to the common knowledge of those skilled in the art.Due to this
The adhesive film of solidification has certain adhesive property, by combination process, and can be by the first engineering plastics
Layer 1, adhesive film 2, the second engineering plastic bed of material 3 fit together, and by processing and forming, define this
The composite diaphragm of invention.
Embodiment 2
With reference to Fig. 2, the vibrating diaphragm of a kind of sound-producing device that the present invention provides, include the first engineering plastic successively
The bed of material 4, adhesive film 5, elastomer layer 6, the second engineering plastic bed of material 7；The described first engineering plastic bed of material
4, adhesive film 5, elastomer layer 6, the second engineering plastic bed of material 7 fit together through combination process.
Same as in Example 1, in the present embodiment, the described first engineering plastic bed of material 4, second
The engineering plastic bed of material 7 can use material well-known to those skilled in the art, such as polyether-ether-ketone, poly-virtue
Ester, Polyetherimide, polyimides, polyphenylene sulfide, PEN, poly-to benzene two
Formic acid glycol ester etc..For a person skilled in the art, the first engineering plastic bed of material 4, second
The material of the engineering plastic bed of material 7 can be identical, it is also possible to different, those skilled in the art can be according to reality
Needs select.
The adhesive film 5 of the present invention is formed by low temperature resistant glue curing, wherein it should be noted that this
Bright low temperature resistant glued membrane refers to when subzero 20 DEG C, and the physical property of glued membrane keeps constant, refers mainly to-20 DEG C
During to room temperature, the elastic modulus change amount of glued membrane is less than 10%, specifically can be surveyed by flow graph
Examination.For a person skilled in the art, in order to obtain the glue of resistance to low temperature, can be at glue
Middle interpolation functional monomer, such as, can add the silane containing alkenyl in esters of acrylic acid glue,
Or silane couplers etc., the addition of functional monomer controls at 0.1wt%-40wt%, the most permissible
The temperature range low temperature resistant by controlling how many regulation glue of functional monomer addition.
The adhesive film 5 of the present invention, low temperature resistant glue is coated solidification, formed have certain thickness,
The adhesive film of intensity, the mode of coating solidification belongs to the common knowledge of those skilled in the art.The present invention
Elastomer layer 6 can use thermoplastic elastic material well-known to those skilled in the art, such as
Polyurethane Thermoplastic Elastomer, thermoplastic poly esters elastomer etc..
Owing to adhesive film and the elastomer layer itself of solidification have certain adhesive property, by compound
Technique, can be by the first engineering plastic bed of material 4, adhesive film 5, elastomer layer 6, the second engineering plastic bed of material
7 fit together, then by processing and forming, define the composite diaphragm of the present invention.
Embodiment 3
With reference to Fig. 3, the vibrating diaphragm of a kind of sound-producing device that the present invention provides, include the first engineering plastic successively
The bed of material the 8, first adhesive film 9, the second engineering plastic bed of material the 10, second adhesive film the 11, the 3rd engineering plastic
The bed of material 12；The described first engineering plastic bed of material the 8, first adhesive film 9, second engineering plastic bed of material 10,
Two adhesive film the 11, the 3rd engineering plastic bed of materials 12 fit together through combination process.
Same as in Example 1, in the present embodiment, the described first engineering plastic bed of material 8, second
The engineering plastic bed of material the 10, the 3rd engineering plastic bed of material 12 can use material well-known to those skilled in the art,
Such as polyether-ether-ketone, polyarylate, Polyetherimide, polyimides, polyphenylene sulfide, poly-naphthalenedicarboxylic acid
Glycol ester, polyethylene terephthalate etc..For a person skilled in the art, first
The material of the engineering plastic bed of material 8, the second engineering plastic bed of material the 10, the 3rd engineering plastic bed of material 12 can be identical,
Can also be different, those skilled in the art can select according to actual needs.
First adhesive film 9, second adhesive film 11 of the present invention is formed by low temperature resistant glue curing, wherein
It should be noted that the low temperature resistant glued membrane of the present invention refers to when subzero 20 DEG C, the physical property of glued membrane keeps
Constant, refer mainly to-20 DEG C to room temperature time, the elastic modulus change amount of glued membrane be less than 10%, the most permissible
Tested by flow graph.For a person skilled in the art, in order to obtain resistance to low temperature
Glue, functional monomer can be added in glue, such as, can add in esters of acrylic acid glue and contain
There is the silane of alkenyl, or silane coupler etc., the addition of functional monomer controls
0.1wt%-40wt%, specifically can be resistance to low by controlling how many regulation glue of functional monomer addition
The temperature range of temperature.
First adhesive film 9, second adhesive film 11 of the present invention, is coated solidification by low temperature resistant glue,
Forming the adhesive film with certain thickness, intensity, the mode of coating solidification belongs to those skilled in the art
Common knowledge.Owing to the adhesive film of solidification itself has certain adhesive property, by combination process,
Can be by the first engineering plastic bed of material the 8, first adhesive film 9, the second engineering plastic bed of material the 10, second glued membrane
Layer the 11, the 3rd engineering plastic bed of material 12 fits together, then by processing and forming, defines the present invention
Composite diaphragm.
Embodiment 4
With reference to Fig. 4, the vibrating diaphragm of a kind of sound-producing device that the present invention provides, include the first engineering plastic successively
The bed of material the 13, first elastomer layer 14, adhesive film the 15, second elastomer layer the 16, second engineering plastics
Layer 17；The described first engineering plastic bed of material the 13, first elastomer layer 14, adhesive film 15, second are elastic
Body layer 16, the second engineering plastic bed of material 17 fits together through combination process.
Identical with embodiment 1, embodiment 2, the described first engineering plastic bed of material the 13, second engineering
Plastic layer 17 can use material well-known to those skilled in the art, such as polyether-ether-ketone, polyarylate,
Polyetherimide, polyimides, polyphenylene sulfide, PEN, poly terephthalic acid
Glycol ester etc..For a person skilled in the art, the first engineering plastic bed of material the 13, second engineering
The material of plastic layer 17 can be identical, it is also possible to different, those skilled in the art can be according to actual needs
Select.
The adhesive film 15 of the present invention is formed by low temperature resistant glue curing, wherein it should be noted that this
The low temperature resistant glued membrane of invention refers to when subzero 20 DEG C, and the physical property of glued membrane keeps constant, refers mainly to-20 DEG C
During to room temperature, the elastic modulus change amount of glued membrane is less than 10%, specifically can be surveyed by flow graph
Examination.For a person skilled in the art, in order to obtain the glue of resistance to low temperature, can be at glue
Middle interpolation functional monomer, such as, can add the silane containing alkenyl in esters of acrylic acid glue,
Or silane couplers etc., the addition of functional monomer controls at 0.1wt%-40wt%, the most permissible
The temperature range low temperature resistant by controlling how many regulation glue of functional monomer addition.
The adhesive film 15 of the present invention, low temperature resistant glue is coated solidification, formed have certain thickness,
The adhesive film of intensity, the mode of coating solidification belongs to the common knowledge of those skilled in the art.The present invention
First elastomer layer the 14, second elastomer layer 16 can use well-known to those skilled in the art
Thermoplastic elastic material, such as Polyurethane Thermoplastic Elastomer, thermoplastic poly esters elastomer etc..
By combination process, can be by the first engineering plastic bed of material the 13, first elastomer layer 14, glued membrane
Layer 15, second elastomer layer 16, the second engineering plastic bed of material 17 fits together, then adds through overmolding
Work, defines the composite diaphragm of the present invention.
Embodiment 5
With reference to Fig. 5, the vibrating diaphragm of a kind of sound-producing device that the present invention provides, include the first engineering plastic successively
The bed of material the 18, first adhesive film 19, elastomer layer the 20, second adhesive film 21, second engineering plastic bed of material
22；The described first engineering plastic bed of material the 18, first adhesive film 19, elastomer layer the 20, second adhesive film
21, the second engineering plastic bed of material 22 fits together through combination process.
Identical with embodiment 1, embodiment 2, in the present embodiment, the described first engineering plastic bed of material
18, the second engineering plastic bed of material 22 can use material well-known to those skilled in the art, such as polyethers ether
Ketone, polyarylate, Polyetherimide, polyimides, polyphenylene sulfide, PEN,
Polyethylene terephthalate etc..For a person skilled in the art, the first engineering plastic bed of material
18, the material of the second engineering plastic bed of material 22 can be identical, it is also possible to different, those skilled in the art can
Select according to actual needs.
First adhesive film 19, second adhesive film 21 of the present invention is formed by the solidification of low temperature resistant glue application,
Wherein it should be noted that the low temperature resistant glued membrane of the present invention refers to when subzero 20 DEG C, the physical property of glued membrane
Keep constant, refer mainly to-20 DEG C to room temperature time, the elastic modulus change amount of glued membrane be less than 10%, specifically
Can be tested by flow graph.For a person skilled in the art, low temperature resistant in order to obtain
The glue of performance, can add functional monomer in glue, such as, can add in esters of acrylic acid glue
Add the silane containing alkenyl, or silane coupler etc., the addition of functional monomer controls
0.1wt%-40wt%, specifically can be resistance to low by controlling how many regulation glue of functional monomer addition
The temperature range of temperature.The adhesive film of the present invention, is coated solidification by low temperature resistant glue, and formation has
Certain thickness, the adhesive film of intensity, coating solidification mode belong to those skilled in the art known often
Know.The elastomer layer 20 of the present invention can use thermoplastic elastomer (TPE) well-known to those skilled in the art
Material, such as Polyurethane Thermoplastic Elastomer, thermoplastic poly esters are elastic.
Owing to adhesive film and the elastomer layer itself of solidification have certain adhesive property, by compound
Technique, can be by the first engineering plastic bed of material the 18, first adhesive film 19, elastomer layer the 20, second glue
Film layer 21, the second engineering plastic bed of material 22 fits together, then through processing and forming, defines this
Bright composite diaphragm.
Although some specific embodiments of the present invention being described in detail by example, but
It should be appreciated by those skilled in the art, above example is merely to illustrate rather than in order to limit
The scope of the present invention processed.It should be appreciated by those skilled in the art, can be without departing from the scope of the present invention
In the case of spirit, above example is modified.The scope of the present invention is by claims
Limit.
Claims (7)
1. the vibrating diaphragm of a sound-producing device, it is characterised in that: include the first engineering plastic bed of material (1),
The second engineering plastic bed of material (3), and it is positioned at the first engineering plastic bed of material (1), the second engineering plastic bed of material
(3) adhesive film (2) between, described adhesive film (2) is formed by the solidification of low temperature resistant glue application,
Wherein, described adhesive film (2) from the elastic modulus change amount of-20 DEG C to room temperature less than 10%；Described
The first engineering plastic bed of material (1), adhesive film (2), the second engineering plastic bed of material (3) are through combination process
Fit together.
Vibrating diaphragm the most according to claim 1, it is characterised in that: the described first engineering plastic bed of material
(1), the second engineering plastic bed of material (3) is polyether-ether-ketone, polyarylate, Polyetherimide, polyamides Asia
One in amine, polyphenylene sulfide, PEN, polyethylene terephthalate.
3. the vibrating diaphragm of a sound-producing device, it is characterised in that: include successively the first engineering plastic bed of material (4),
Adhesive film (5), elastomer layer (6), the second engineering plastic bed of material (7)；Described adhesive film (5)
Being formed by the solidification of low temperature resistant glue application, wherein, described adhesive film (5) is from the bullet of-20 DEG C to room temperature
Property modulus change amount less than 10%；The described first engineering plastic bed of material (4), adhesive film (5), elasticity
Body layer (6), the second engineering plastic bed of material (7) fit together through combination process.
Vibrating diaphragm the most according to claim 3, it is characterised in that: described elastomer layer (6) is
Thermoplastic polyurethanes elastomer or thermoplastic poly esters elastomer.
5. the vibrating diaphragm of a sound-producing device, it is characterised in that: include successively the first engineering plastic bed of material (8),
First adhesive film (9), the second engineering plastic bed of material (10), the second adhesive film (11), the 3rd engineering
Plastic layer (12)；Described first adhesive film (9), the second adhesive film (11) are coated with by low temperature resistant glue
Cloth solidification form, wherein, described first adhesive film (9), the second adhesive film (11) from-20 DEG C to
The elastic modulus change amount of room temperature is less than 10%；The described first engineering plastic bed of material (8), the first adhesive film
(9), the second engineering plastic bed of material (10), the second adhesive film (11), the 3rd engineering plastic bed of material (12)
Fit together through combination process.
6. the vibrating diaphragm of a sound-producing device, it is characterised in that: include successively the first engineering plastic bed of material (13),
First elastomer layer (14), adhesive film (15), the second elastomer layer (16), the second engineering plastic
The bed of material (17)；Described adhesive film (15) is formed by the solidification of low temperature resistant glue application；Wherein, described
Adhesive film (15) is less than 10% from the elastic modulus change amount of-20 DEG C to room temperature；Described first engineering plastic
The bed of material (13), the first elastomer layer (14), adhesive film (15), the second elastomer layer (16),
The second engineering plastic bed of material (17) fits together through combination process.
7. the vibrating diaphragm of a sound-producing device, it is characterised in that: include successively the first engineering plastic bed of material (18),
First adhesive film (19), elastomer layer (20), the second adhesive film (21), the second engineering plastics
Layer (22)；Described first adhesive film (19), the second adhesive film (21) are by low temperature resistant glue application
Solidification forms, wherein, described first adhesive film (19), the second adhesive film (21) from-20 DEG C to room
The elastic modulus change amount of temperature is less than 10%；The described first engineering plastic bed of material (18), the first adhesive film
(19), elastomer layer (20), the second adhesive film (21), the second engineering plastic bed of material (22) warp
Cross combination process to fit together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293722.XA CN105992106B (en) | 2016-05-05 | 2016-05-05 | Vibrating diaphragm of sound generating device |
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|---|---|---|---|
| CN201610293722.XA CN105992106B (en) | 2016-05-05 | 2016-05-05 | Vibrating diaphragm of sound generating device |
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| CN105992106B CN105992106B (en) | 2021-12-28 |
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| CN110774703A (en) * | 2019-10-08 | 2020-02-11 | 苏州市新广益电子有限公司 | OCA acoustic film and preparation method thereof |
| CN112468937A (en) * | 2020-11-23 | 2021-03-09 | 歌尔股份有限公司 | Laminated composite film and preparation method thereof, vibrating diaphragm and sound production device |
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| Publication number | Publication date |
|---|---|
| CN105992106B (en) | 2021-12-28 |
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