CN207053757U - Vibrating diaphragm and loudspeaker monomer - Google Patents
Vibrating diaphragm and loudspeaker monomer Download PDFInfo
- Publication number
- CN207053757U CN207053757U CN201720803208.6U CN201720803208U CN207053757U CN 207053757 U CN207053757 U CN 207053757U CN 201720803208 U CN201720803208 U CN 201720803208U CN 207053757 U CN207053757 U CN 207053757U
- Authority
- CN
- China
- Prior art keywords
- layer
- top layer
- vibrating diaphragm
- damping
- elastomer
- 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.)
- Active
Links
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The utility model discloses a kind of vibrating diaphragm and loudspeaker monomer.The vibrating diaphragm include the first top layer, the second top layer, the first damping layer by layer, the second damping layer and elastomer layer, first top layer, the second top layer, the first damping layer, the second damping layer and elastomer layer are combined with each other, elastomer layer is between the first damping layer and the second damping layer, and first damping layer and the second damping layer between the first top layer and the second top layer, the first top layer and the second top layer wherein at least one are made by PPSU.The vibrating diaphragm has good resistance to elevated temperatures, resistance to tearing energy, durability and rebound performance.The loudspeaker monomer includes vibrating diaphragm provided by the utility model.
Description
Technical field
Electroacoustic switch technology field is the utility model is related to, more particularly, to a kind of vibrating diaphragm and applies the vibrating diaphragm
Loudspeaker monomer.
Background technology
At present, Microspeaker widely uses polyether-ether-ketone (PEEK), PEI (PEI), polyimides (PI), poly-
The composite of the engineering plastics such as aromatic ester (PAR) and glued membrane is as vibrating diaphragm.But with the continuous hair of the acoustic product market demand
Exhibition, people propose higher requirement to loudspeaker acoustical behavior and reliability.For example, the running power of loudspeaker requires more next
Higher, the duration of runs requires increasingly longer.This needs vibrating diaphragm to bear high temperature and is not easy to tear under big load.It is and existing
The performances such as the resistance to elevated temperatures of vibrating diaphragm, resistance to tearing, durability, resilience can not meet the requirement of acoustics and reliability.
Utility model content
A purpose of the present utility model is to provide a kind of new solution of vibrating diaphragm.
According to first aspect of the present utility model, there is provided a kind of vibrating diaphragm.The vibrating diaphragm include the first top layer, the second top layer,
First damping layer by layer, the second damping layer and elastomer layer, first top layer, second top layer, the first damping layer, the second resistance
Buddhist nun's layer and elastomer layer are combined with each other, the elastomer layer between first damping layer and second damping layer,
And first damping layer and second damping layer be between first top layer and second top layer, first table
Layer and second top layer wherein at least one are made by PPSU.
Alternatively, when on first top layer and second top layer, one of them is made by PPSU, institute
Another in the first top layer and second top layer is stated by polyether-ether-ketone, PEN, PAEK, polyethers
Ketone, polyarylate, liquid crystal polymer, polyethylene terephthalate, polybutylene terephthalate (PBT), makrolon, polyethers
Acid imide, polyether sulfone, polyimides, polyphenylene sulfide or polysulfones are made.
Alternatively, the elastomer layer is by polyurethane elastomer, polyester elastomer, polyamide-based elastomer, polyene
Olefin elastomer or TPV are made.
Alternatively, first damping layer and/or the second damping layer by acrylate glue, silica gel or pressure sensitive adhesive make and
Into.
Alternatively, at least one layer of thickness in first top layer, second top layer, the elastomer layer is 2-30
μm。
Alternatively, at least one layer of thickness in first damping layer and the second damping layer is 5-50 μm.
Alternatively, the first top layer being made by the PPSU and the modulus of elasticity on the second top layer are more than or equal to
1000MPa, and it is less than or equal to 2500MPa.
According to other side of the present utility model, there is provided a kind of loudspeaker monomer.The loudspeaker monomer includes this reality
With the vibrating diaphragm of new offer, and the voice coil loudspeaker voice coil being fixed on below vibrating diaphragm.
Alternatively, the vibrating diaphragm includes central part and around the ring portion of central part, the central part and the ring portion
By the first top layer, the first damping layer, elastomer layer, the compound composition of the second damping layer and the second top layer；Or only central part by
First top layer, the first damping layer, elastomer layer, the second damping layer and the compound composition in the second top layer；It is or only described
Ring portion is by first top layer, the first damping layer, elastomer layer, the second damping layer and second top layer is compound forms.
Alternatively, the first top layer for being made by the PPSU is made by the PPSU
Second top layer and the voice coil loudspeaker voice coil secure bond.
Inventor of the present utility model has found that in the prior art, the acoustical behavior and reliability of vibrating diaphragm can not meet to raise
The requirement of sound device monomer.Therefore, the technical assignment or technical problem to be solved that the utility model to be realized are abilities
It is that field technique personnel never expect or it is not expected that, therefore the utility model is a kind of new technical scheme.
In embodiment of the present utility model, the first top layer and/or the second top layer as made from PPSU (PPSU),
Resistance to elevated temperatures, resistance to tearing energy and the durability of vibrating diaphragm can be significantly improved, this causes the acoustical behavior of vibrating diaphragm and reliability to carry
It is high.
In addition, this material can reduce the diaphagras of vibrating diaphragm so that vibrating diaphragm can be normal under bigger power
Work.
In addition, elastomer layer can improve the resilience of vibrating diaphragm.First damping layer and the second damping layer, which can improve, raises one's voice
The tonequality of device monomer.
It is of the present utility model other by referring to the drawings to the detailed description of exemplary embodiment of the present utility model
Feature and its advantage will be made apparent from.
Brief description of the drawings
It is combined in the description and the accompanying drawing of a part for constitution instruction shows embodiment of the present utility model, and
And it is used to explain principle of the present utility model together with its explanation.
Fig. 1 is the sectional view according to the vibrating diaphragm of the utility model one embodiment.
Description of reference numerals：
11：First top layer；12：First elastomer layer；13：Damping layer；14：Second elastomer layer；15：Second top layer.
Embodiment
Various exemplary embodiments of the present utility model are described in detail now with reference to accompanying drawing.It should be noted that：It is unless another
Illustrate outside, the part and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is unlimited
The scope of the utility model processed.
The description only actually at least one exemplary embodiment is illustrative to be never used as to this practicality below
New and its application or any restrictions used.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
Fig. 1 is the sectional view according to the vibrating diaphragm of the utility model one embodiment.
According to one embodiment of the present utility model, there is provided a kind of vibrating diaphragm.For example, vibrating diaphragm is ring vibrating diaphragm or plane
Structure vibrating diaphragm.The vibrating diaphragm is used for loudspeaker monomer.
As shown in figure 1, the vibrating diaphragm includes the first top layer 11, the second top layer 15, the first damping layer 12, the and of the second damping layer 14
Elastomer layer 13.First top layer 11, the second top layer 15, the first damping layer 12, the second damping layer 14 and elastomer layer 13 are compounded in
Together.Elastomer layer 13 is between the first damping layer 12 and the second damping layer 14, and the first damping layer 12 and the second damping layer
14 between the first top layer 11 and the second top layer 15.First top layer 11 and the wherein at least one of the second top layer 15 are by polyphenylene
Sulfone (PPSU) is made.
Specifically, vibrating diaphragm is combined by plural layers, to form composite bed.First top layer 11 and the second top layer 15 are multiple
The outer layer of layer is closed, elastomer layer 13 is the intermediate layer of composite bed, and sandwiched first damps between the top layer 11 of elastomer layer 13 and first
Layer 12, the second damping layer of sandwiched 14 between the top layer 15 of elastomer layer 13 and second.
It should be noted that in the utility model, can be with sandwiched second between the top layer 11 of elastomer layer 13 and first
Damping layer 14, can be without limitation with the first damping layer of sandwiched 12 between the top layer 15 of elastomer layer 13 and second.Below with
The first damping layer of sandwiched 12 between the top layer 11 of elastomer layer 13 and first, sandwiched second between the top layer 15 of elastomer layer 13 and second
Exemplified by damping layer 14, illustrate.
Elastomer layer 13 has good rebound performance, and vibrating diaphragm resilience in vibration can be made good, prevent vibrating diaphragm
Plastic deformation.
First damping layer 12 and the second damping layer 14 can produce damping effect, to consume unnecessary vibrational energy, with right
The vibration frequency of vibrating diaphragm is adjusted, and prevents that the sound of loudspeaker monomer is ear-piercing.
In addition, the first damping layer 12 and the second damping layer 14 can reduce vibration when as caused by vibrating diaphragm noise, can change
The tonequality of kind loudspeaker monomer.
It should be noted that the first damping layer 12, the damping layer 14 of elastomer layer 13 and second can be entity structures, also may be used
To be skeleton structure.The structure of vibrating diaphragm is not limited to above-mentioned five layers.In other examples, vibrating diaphragm includes multiple elastomer layers 13, more
Individual damping layer.Either, vibrating diaphragm also includes other functional layers.
For example, the functional layer of the amplitude for increasing vibrating diaphragm；For the functional layer for the diaphagras for improving vibrating diaphragm；For surveying
Measure functional layer of amplitude of vibrating diaphragm etc..
Those skilled in the art can set other work(according to being actually needed between the first top layer 11 and the second top layer 15
Ergosphere.
The chemical constitution of PPSU (PPSU) material is：
PPSU is to be joined directly together to form conjugated structure by two phenyl ring.It is enough that the molecular structure possesses material
Rigidity.
In addition, the presence of ehter bond substantially improves the compliance of molecule so that the toughness of the film after shaping improves, breach
Sensitiveness reduces.This causes film to be not easy to be torn.The modulus of elasticity for the film that PPSU (PPSU) is made is
1000MPa-2500MPa；Glass transition temperature is 180-240 DEG C；Elongation at break is more than or equal to 80%.PPSU these property
The skin-material used at present can be above.
The first top layer 11 as made from PPSU (PPSU) and/or the second top layer 15, can significantly improve the resistance to of vibrating diaphragm
High-temperature behavior, resistance to tearing energy and durability, this causes the vibration performance of vibrating diaphragm and reliability to improve.
In addition, this material can reduce the diaphagras of vibrating diaphragm so that vibrating diaphragm can be normal under bigger power
Work.
Optionally, on the first top layer 11 and the second top layer 15, one of them is made by PPSU (PPSU)
When, in the first top layer 11 and the second top layer 15 another by polyether-ether-ketone (PEEK), PEN (PEN),
PAEK (PAEK), polyether-ketone (PEK), polyarylate (PAR), liquid crystal polymer (LCP), polyethylene terephthalate
(PET), polybutylene terephthalate (PBT) (PBT), makrolon (PC), PEI (PEI), polyether sulfone (PES), polyamides
Imines (PI), polyphenylene sulfide (PPS) or polysulfones (PSU) are made.These materials it is tear-resistant functional.
It should be noted that polyether-ether-ketone (PEEK), PEN (PEN), PAEK (PAEK), poly-
Ether ketone (PEK), polyarylate (PAR), liquid crystal polymer (LCP), polyethylene terephthalate (PET), poly terephthalic acid
Butanediol ester (PBT), makrolon (PC), PEI (PEI), polyether sulfone (PES), polyimides (PI), polyphenylene sulfide
(PPS) and polysulfones (PSU) is the well known materials as vibrating diaphragm, is no longer illustrated one by one herein.
For example, any one of above-mentioned material, the first top layer 11 or the second top layer 15 are formed using the method for injection.
It should be noted that the first top layer 11 and the second top layer 15 can use simultaneously PPSU (PPSU) make and
Into.In this way, resistance to elevated temperatures, resistance to tearing energy and the durability of vibrating diaphragm can further be improved.
In addition, if the vibrating diaphragm of planar structure, when being installed in loudspeaker monomer, due to vibrating diaphragm two top layers all
With good physical property, therefore need not distinguish between the positive and negative of vibrating diaphragm.
Preferably, when vibrating diaphragm is assembled to loudspeaker monomer, the top layer as made from PPSU (PPSU) (for example,
First top layer 11 or the second top layer 15) close to magnetic circuit system.The top layer is directly connected with voice coil loudspeaker voice coil.The heat resistance on the top layer is good
It is good, during long-term use, the heat as caused by voice coil loudspeaker voice coil can be born.
Optionally, elastomer layer 13 can be thermoplastic elastomer (TPE).
Further, elastomer layer 13 is by polyurethane elastomer (TPU), polyester elastomer (TPEE), polyamide-based
Elastomer (TPAE), polyolefin elastomer (POE) or TPV (TPV) are made.This different materials returns
Bullet is worked well, and vibrating diaphragm can be made to possess good resilience.
For example, any one of above-mentioned material, elastomer layer 13 is formed using the method for injection molding.
Preferably, at least one layer of thickness in the first top layer 11, the second top layer 15 and elastomer layer 13 is 2-30 μm.
The thickness range can enable vibrating diaphragm have good resistance to elevated temperatures, resistance to tearing, durability and resilience.
For example, three layers are all film.The film of the thickness range is easily molded, and difficulty of processing is low.
It should be noted that the power of loudspeaker is bigger, then the thickness on the first top layer 11, the second top layer 15 and elastomer layer 13
Degree is bigger；Conversely, power of loudspeaker is smaller, then the thickness on the first top layer 11, the second top layer 15 and elastomer layer 13 is smaller.
Those skilled in the art can set the first top layer 11, second top layer 15, elastomer layer 13 according to being actually needed
Thickness.
Optionally, the first damping layer 12 and/or the second damping layer 14 made by acrylate glue, silica gel or pressure sensitive adhesive and
Into.This different materials has good damping, can significantly reduce the F of vibrating diaphragmo(lowest resonance frequency).
In addition, this different materials can reduce noise caused by vibrating diaphragm.
In addition, the viscosity of this different materials is high, this causes between the first damping layer 12 and the first top layer 11, the first damping layer
Between 12 and elastomer layer 13, the second damping layer 14 and the support of the second top layer 15, and the second damping layer 14 and elastomer layer 13
Between fitting be easier.
In addition, the vibrating diaphragm of composite bed can obtain good bonding strength, good tolerance.
Preferably, at least one layer of thickness in the first damping layer 12 and the second damping layer 14 is 5-50 μm.The thickness
Damping is good, and is processed into film and is easier.
It should be noted that the power of loudspeaker is bigger, then the thickness of the first damping layer 12 and the second damping layer 14 is bigger；
Otherwise the power of loudspeaker is smaller, then the thickness of the first damping layer 12 and the second damping layer 14 is smaller.
The thickness that those skilled in the art can set the first damping layer 12 and the second damping layer 14 according to being actually needed.
According to another embodiment of the present utility model, there is provided a kind of loudspeaker monomer.The loudspeaker monomer includes this
The vibrating diaphragm that utility model provides, and the voice coil loudspeaker voice coil being fixed on below vibrating diaphragm.
Further, vibrating diaphragm includes central part and around the ring portion of central part, and central part and ring portion are by the first table
Layer, the compound composition of the first damping layer, elastomer layer, the second damping layer and the second top layer；Or only central part is by the first top layer,
One damping layer, elastomer layer, the compound composition of the second damping layer and the second top layer；Or only ring portion is by the first top layer, the first resistance
Buddhist nun's layer, elastomer layer, the compound composition of the second damping layer and the second top layer.
Further, the first top layer being made by PPSU or the second table being made by PPSU
Layer and the voice coil loudspeaker voice coil secure bond.When first top layer of as only vibrating diaphragm is made by PPSU, then the first of vibrating diaphragm
Top layer is connected close to magnetic circuit system with voice coil loudspeaker voice coil.When being made on the second top layer of only vibrating diaphragm by PPSU, then vibrating diaphragm
Second top layer is connected close to magnetic circuit system with voice coil loudspeaker voice coil.Made on the first top layer of vibrating diaphragm and the second top layer by PPSU and
Cheng Shi, then any top layer in the first top layer and the second top layer be connected close to magnetic circuit system with voice coil loudspeaker voice coil.So, by gathering sub- benzene
The heat resistance on the top layer that base sulfone is made is good, during long-term use, can bear the heat as caused by voice coil loudspeaker voice coil.
Optionally, loudspeaker monomer is moving-coil type monomer or moving-iron type monomer.For convenience of explanation, in the embodiment
In, by taking moving-coil type monomer as an example.
In this example embodiment, vibrating diaphragm is ring vibrating diaphragm.Ring vibrating diaphragm is connected with voice coil loudspeaker voice coil, to form vibration component.Loudspeaker list
Body also includes magnetic circuit component.Vibrating diaphragm is suspended above above magnetic circuit component.In the magnetic gap of voice coil loudspeaker voice coil insertion magnetic circuit component.
Voice coil loudspeaker voice coil receives the ac signal of external circuit, is vibrated in the magnetic field of magnetic circuit component.Voice coil loudspeaker voice coil drives vibrating diaphragm
Vibration, to send sound.
The loudspeaker monomer has the characteristics of good tolerance, sound effect is good.
Although some specific embodiments of the present utility model are described in detail by example, this area
It is to be understood by the skilled artisans that example above merely to illustrate, rather than in order to limit the scope of the utility model.This
Field it is to be understood by the skilled artisans that can not depart from the scope of the utility model and spirit in the case of, to above example
Modify.The scope of the utility model is defined by the following claims.
Claims (10)
- A kind of 1. vibrating diaphragm, it is characterised in that：Including the first top layer, the second top layer, the first damping layer by layer, the second damping layer and elasticity Body layer, first top layer, second top layer, the first damping layer, the second damping layer and elastomer layer are combined with each other, described Elastomer layer is between first damping layer and second damping layer, and first damping layer and second damping Layer between first top layer and second top layer, first top layer and second top layer wherein at least one by PPSU is made.
- 2. vibrating diaphragm according to claim 1, it is characterised in that：First top layer and second top layer one of them When being made by PPSU, another in first top layer and second top layer is by polyether-ether-ketone, poly- naphthalene two It is formic acid glycol ester, PAEK, polyether-ketone, polyarylate, liquid crystal polymer, polyethylene terephthalate, poly- to benzene two Formic acid butanediol ester, makrolon, PEI, polyether sulfone, polyimides, polyphenylene sulfide or polysulfones are made.
- 3. vibrating diaphragm according to claim 1, it is characterised in that：The elastomer layer is by polyurethane elastomer, polyesters Elastomer, polyamide-based elastomer, polyolefin elastomer or TPV are made.
- 4. vibrating diaphragm according to claim 1, it is characterised in that：First damping layer and/or the second damping layer are by propylene Sour glue, silica gel or pressure sensitive adhesive are made.
- 5. vibrating diaphragm according to claim 1, it is characterised in that：First top layer, second top layer, the elastomer At least one layer of thickness in layer is 2-30 μm.
- 6. vibrating diaphragm according to claim 1, it is characterised in that：At least one in first damping layer and the second damping layer The thickness of layer is 5-50 μm.
- 7. vibrating diaphragm according to claim 1, it is characterised in that：The first top layer for being made by the PPSU and The modulus of elasticity on the second top layer is more than or equal to 1000MPa, and is less than or equal to 2500MPa.
- A kind of 8. loudspeaker monomer, it is characterised in that：Including the vibrating diaphragm as described in any one of claim 1-7, Yi Jigu Voice coil loudspeaker voice coil below vibrating diaphragm.
- 9. loudspeaker monomer according to claim 8, it is characterised in that：The vibrating diaphragm includes central part and around the ring portion of central part, and the central part and the ring portion are by the first table Layer, the compound composition of the first damping layer, elastomer layer, the second damping layer and the second top layer；Or only central part is by first table Layer, the first damping layer, elastomer layer, the second damping layer and the compound composition in the second top layer；Or only described ring portion is by institute State the first top layer, the first damping layer, elastomer layer, the second damping layer and the compound composition in the second top layer.
- 10. loudspeaker monomer according to claim 9, it is characterised in that：The first top layer for being made by the PPSU or by the second top layer that the PPSU is made with The voice coil loudspeaker voice coil secure bond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720803208.6U CN207053757U (en) | 2017-07-04 | 2017-07-04 | Vibrating diaphragm and loudspeaker monomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720803208.6U CN207053757U (en) | 2017-07-04 | 2017-07-04 | Vibrating diaphragm and loudspeaker monomer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207053757U true CN207053757U (en) | 2018-02-27 |
Family
ID=61495125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720803208.6U Active CN207053757U (en) | 2017-07-04 | 2017-07-04 | Vibrating diaphragm and loudspeaker monomer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207053757U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019237600A1 (en) * | 2018-06-15 | 2019-12-19 | 歌尔股份有限公司 | Acrylic pressure sensitive adhesive and preparation method thereof, composite film structure, diaphragm, and sound producing device |
| CN110809221A (en) * | 2019-09-17 | 2020-02-18 | 安克创新科技股份有限公司 | Vibrating diaphragm and loudspeaker |
-
2017
- 2017-07-04 CN CN201720803208.6U patent/CN207053757U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019237600A1 (en) * | 2018-06-15 | 2019-12-19 | 歌尔股份有限公司 | Acrylic pressure sensitive adhesive and preparation method thereof, composite film structure, diaphragm, and sound producing device |
| CN110809221A (en) * | 2019-09-17 | 2020-02-18 | 安克创新科技股份有限公司 | Vibrating diaphragm and loudspeaker |
| CN110809221B (en) * | 2019-09-17 | 2022-02-15 | 安克创新科技股份有限公司 | Vibrating diaphragm and loudspeaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207053756U (en) | Vibrating diaphragm and loudspeaker monomer | |
| CN105188000B (en) | A kind of loudspeaker | |
| US10178477B2 (en) | Vibrating diaphragm assembly | |
| CN206821009U (en) | The diaphragm of loudspeaker and loudspeaker | |
| CN205830005U (en) | A kind of diaphragm structure of pronunciation device | |
| CN110446143B (en) | Sound generating device's vibrating diaphragm and sound generating device | |
| CN207053770U (en) | Vibrating diaphragm and loudspeaker monomer | |
| CN106792375B (en) | Diaphragm of loudspeaker component | |
| CN105872911B (en) | A kind of vibrating diaphragm of sounding device | |
| CN208112933U (en) | Sounding device and electronic equipment | |
| CN109076289A (en) | acoustic membrane | |
| CN207124738U (en) | Reinforcement part and oscillating plate for sound-producing device | |
| CN207053757U (en) | Vibrating diaphragm and loudspeaker monomer | |
| CN206658291U (en) | Vibrating diaphragm and the minitype acoustic generator provided with the vibrating diaphragm | |
| TW201501549A (en) | Composite for production of an acoustic membrane and acoustic membrane | |
| CN207070338U (en) | Vibrating diaphragm and loudspeaker monomer | |
| CN207070314U (en) | Vibrating diaphragm, loudspeaker monomer and electronic equipment for loudspeaker | |
| CN106303856A (en) | Loudspeaker monomer and electronic equipment | |
| CN108859296B (en) | Composite membrane structure, vibrating diaphragm and sound production device | |
| WO2018058841A1 (en) | Diaphragm and miniature acoustical generator provided with diaphragm | |
| CN206024094U (en) | A kind of vibrating diaphragm component | |
| CN105376679A (en) | Vibration diaphragm and loudspeaker provided with same | |
| CN205622855U (en) | Vibration system and speaker monomer | |
| US10397705B2 (en) | Multi-layer composite for acoustic membranes | |
| CN207053754U (en) | Vibrating diaphragm and loudspeaker monomer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |