CN207802347U - Composite diaphragm and sound-producing device for sound-producing device - Google Patents
Composite diaphragm and sound-producing device for sound-producing device Download PDFInfo
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- CN207802347U CN207802347U CN201721211535.9U CN201721211535U CN207802347U CN 207802347 U CN207802347 U CN 207802347U CN 201721211535 U CN201721211535 U CN 201721211535U CN 207802347 U CN207802347 U CN 207802347U
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Abstract
The utility model discloses a kind of composite diaphragms and sound-producing device for sound-producing device.The composite diaphragm includes two surface layers and at least one carbon nanotube blending and modifying damping layer, and at least one carbon nanotube blending and modifying damping layer is located between two surface layers.The composite diaphragm has thermal stability, temperature tolerance and damping characteristic good, feature with long service life.
Description
Technical field
The utility model is related to electroacoustic switch technology fields, shake for the compound of sound-producing device more particularly, to a kind of
Film and sound-producing device.
Background technology
With the rapid development of portable electronic device, Microspeaker is in electricity such as laptop, tablet computer, mobile phones
Extensive use in sub- product.People are also higher and higher to the Functional Requirement of loud speaker.Composite diaphragm is widely used in raising one's voice
In device.Damping layer is generally included in composite diaphragm, to improve the damping of composite diaphragm.
The damping layer of existing composite diaphragm has the following defects：
Thermal stability is poor：The power of loud speaker is higher and higher, and this requires the composite diaphragms in loud speaker at high power
Or still there is preferable acoustical behavior under high voltage.The thermal stability of existing damping layer cannot meet high power, high voltage
Requirement.
In addition, the temperature tolerance of existing damping layer is poor, damping is small, the bonding force between other film layers is small.
Due to the drawbacks described above of damping layer, leads to the thermal stability of composite diaphragm, temperature tolerance, damping characteristic and use the longevity
Life cannot be satisfied requirement.
Utility model content
One purpose of the utility model is to provide a kind of new solution of the composite diaphragm for sound-producing device.
It is according to the present utility model in a first aspect, providing a kind of composite diaphragm for sound-producing device.The composite diaphragm
Including two surface layers and at least one carbon nanotube blending and modifying damping layer, at least one carbon nanotube blending and modifying resistance
Buddhist nun's layer is located between two surface layers.
Optionally, the surface layer is made by engineering plastics or elastomer.
Optionally, including three film layers fitting together, wherein the carbon nanotube blending and modifying damping layer and two
The surface layer is bonded together.
Optionally, including four film layers fitting together, wherein two surface layers are made by engineering plastics,
One in two middle layers is the carbon nanotube blending and modifying damping layer, another is made by elastomer；Or
Two surface layers are made by elastomer, and one in two middle layers is the carbon nanotube blending and modifying
Damping layer, another is made by engineering plastics.
Optionally, including five film layers fitting together, wherein two surface layers are made by engineering plastics,
One in three middle layers is the carbon nanotube blending and modifying damping layer, other two is made by elastomer, described
Carbon nanotube blending and modifying damping layer is located between two elastomer layers；Or
Two surface layers are made by elastomer, and one in three middle layers is the carbon nanotube blending and modifying
Damping layer, other two is made by engineering plastics, and the carbon nanotube blending and modifying damping layer is located at two engineering plastics
Between layer；Or
Two surface layers and a middle layer are made by engineering plastics, other two middle layer is the carbon nanometer
Pipe blending and modifying damping layer, the engineering plastic bed of material as middle layer be located at two carbon nanotube blending and modifying damping layers it
Between.
Optionally, including five film layers fitting together, wherein two surface layers are made by engineering plastics,
Two in three middle layers are the carbon nanotube blending and modifying damping layer, another is made by elastomer, elasticity
Body layer is located between two carbon nanotube blending and modifying damping layers；Or
Two surface layers are made by elastomer, and two in three middle layers are the carbon nanotube blending and modifying
Damping layer, another is made by engineering plastics, and the engineering plastic bed of material is located at two carbon nanotube blending and modifying dampings
Between layer；Or
Two surface layers and a middle layer are made by elastomer, other two middle layer is the carbon nanotube
Blending and modifying damping layer, the elastomer layer as middle layer are located between two carbon nanotube blending and modifying damping layers.
Optionally, include the film layer being made by engineering plastics, the engineering plastics are polyether-ether-ketone, polyarylate, poly-
It is any one in etherimide, polyimides, polyphenylene sulfide, polyethylene naphthalate and polyethylene terephthalate
Kind.
Optionally, include the film layer being made by elastomer, the elastomer is styrenic elastomer, olefines bullet
Property body, diene class elastomer, polyvinyl chloride-base elastomer, urethane class elastomer, esters elastomer, amides elastomer, Organic fluoride
Any one in class elastomer, organic silicon elastomer and vinyl elastomer.
Optionally, for make the carbon nanotube blending and modifying damping layer damping glue be acrylic compounds glue or
Organic silicon glue.
Other side according to the present utility model provides a kind of sound-producing device.The sound-producing device includes that this practicality is new
The composite diaphragm that type provides.
In the utility model embodiment, the introducing of carbon nanotube, can improve damping glue polymer molecule between
Compactedness.Carbon nanotube play enhancing, toughening effect, to improve the thermal stability of damping layer, and then improve multiple
Close the thermal stability of vibrating diaphragm.
In addition, carbon nanotube improves the cohesive force of damping layer itself, in this way, damping layer needs to absorb more heats
It can decompose, to improve the temperature tolerance of damping layer, and then improve the temperature tolerance of composite diaphragm.
In addition, carbon nanotube increases the intermolecular frictional force of damping layer, to increase the damping of damping layer,
And then the damping characteristic of composite diaphragm is improved, significantly reduce noise when composite diaphragm vibration.
In addition, the active group in the surface of carbon nanotube.Active group increases wetability of the damping layer to bonding plane,
To increase the cohesive force of damping layer, and then the intensity of composite diaphragm is improved, improves the service life of composite diaphragm.
In addition, compared with the damping layer for being not added with carbon nanotube, the intensity higher of carbon nanotube blending and modifying damping layer, into
One step improves the service life of composite diaphragm.
By referring to the drawings to the detailed description of the exemplary embodiment of the utility model, the utility model it is other
Feature and its advantage will become apparent.
Description of the drawings
It is combined in the description and the attached drawing of a part for constitution instruction shows the embodiments of the present invention, and
And together with its explanation for explaining the principles of the present invention.
Fig. 1 is the sectional view of the composite diaphragm of three film layer structures of one embodiment according to the present utility model.
Fig. 2-3 is the sectional view of the composite diaphragm of four film layer structures of one embodiment according to the present utility model.
Fig. 4-9 is the sectional view of the composite diaphragm of five film layer structures of embodiment according to the present utility model.
Reference sign：
1：The engineering plastic bed of material；2：Carbon nanotube blending and modifying damping layer；3：Elastomer layer.
Specific implementation mode
The various exemplary embodiments of the utility model are described in detail now with reference to attached drawing.It should be noted that：Unless another
It illustrates outside, the component 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.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality
Novel and its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
One embodiment according to the present utility model provides a kind of composite diaphragm for sound-producing device.This is compound to shake
Film includes two surface layers and at least one carbon nanotube blending and modifying damping layer 2.At least one carbon nanotube blending and modifying
Damping layer 2 is located between two surface layers.Since the surface of carbon nanotube blending and modifying damping layer 2 has viscosity, therefore cannot function as
Surface layer.
It will be apparent to a skilled person that carbon nanotube blending and modifying damping layer 2 refers in preparation process, to
Carbon nanotube is added in damping glue, to be modified to the damping layer after forming.Blending and modifying can be that physical blending also may be used
To be chemical blend.Optionally, for make carbon nanotube blending and modifying damping layer 2 damping glue be acrylic compounds glue or
Person's organic silicon glue.The tearing toughness for the damping layer that both damping glue are formed is high.Damping glue water is cured using coating
Mode form damping layer.
In the utility model embodiment, the introducing of carbon nanotube, can improve damping glue polymer molecule between
Compactedness.Carbon nanotube play enhancing, toughening effect, to improve the thermal stability of damping layer.
In addition, carbon nanotube improves the cohesive force of damping layer itself, in this way, damping layer needs to absorb more heats
It can decompose, to improve the temperature tolerance of damping layer.
In addition, carbon nanotube increases the intermolecular frictional force of damping layer, to increase the damping of damping layer,
Significantly reduce noise when composite diaphragm vibration.
In addition, the active group in the surface of carbon nanotube.Active group increases wetability of the damping layer to bonding plane,
To increase the cohesive force of damping layer.
In addition, compared with the damping layer for being not added with carbon nanotube, the intensity higher of carbon nanotube blending and modifying damping layer 2.
Preferably, the additive amount of carbon nanotube is the 1%-10% for damping glue, and ratio therein is percentage by volume.It should
The carbon nanotube blending and modifying damping layer 2 of proportional region has more excellent thermal stability, temperature tolerance, damping characteristic and more
Big cohesive force.
Preferably, carbon nanotube is the carbon nanotube handled by physical modification.This may be used in those skilled in the art
The common technology in field carries out physical modification processing to carbon nanotube.Carbon nano tube surface can be increased by being handled by physical modification
Active group.The binding force of active group and damping glue is strong.After damping formable layer, the carbon handled by physical modification is received
Compatibility of the mitron in damping layer is more preferable.
Can also be, by silane coupling agent, such as KH570, processing to be modified to carbon nanotube, to introduce reactive group
Group.Reactive group is reacted with the reaction monomers in damping glue, and is introduced into damping layer strand as side group.It is logical
This mode is crossed, compatibility of the carbon nanotube in damping layer can be equally increased.
In addition, after silane coupler modified processing, the surface of carbon nanotube carries hydrogen bond.On the one hand, hydrogen bond increases
The crosslinked action of damping layer；On the other hand, the introducing of carbon nanotube increases hydrogen bond and polar interaction, promotes damping layer
Cross-linked network formation.In this way, the cohesive force for further improving damping layer itself, to further improve
The temperature tolerance of damping layer, and then further improve the temperature tolerance of composite diaphragm.
In one example, as shown in Figure 1, composite diaphragm includes three film layers to fit together.Surface layer is by engineering plastic
Material or elastomer are made.The material on two surface layers can be identical and can be different.Carbon nanotube blending and modifying damping layer
With adhesive property.Carbon nanotube blending and modifying damping layer is bonded together with two surface layers.
In this example embodiment, a surface layer is made by engineering plastics, to form the engineering plastic bed of material 1, another surface layer by
Elastomer is made, to form elastomer layer 3.Middle layer is carbon nanotube blending and modifying damping layer 2.Carbon nanotube blending changes
Property damping layer 2 have good adhesive property, can directly bond together with two surface layers.
Optionally, engineering plastics are polyether-ether-ketone, polyarylate, polyetherimide, polyimides, polyphenylene sulfide, poly- naphthalene two
Any one in formic acid glycol ester and polyethylene terephthalate.The toughness of above-mentioned material is good, tearing toughness
It is high.
It should be noted that in all embodiments of the utility model, engineering plastics can also be other materials, this reality
With novel without limitation.
Optionally, elastomer is styrenic elastomer, olefin type elastomer, diene class elastomer, polyvinyl chloride-base elasticity
Body, urethane class elastomer, esters elastomer, amides elastomer, organic fluoride class elastomer, organic silicon elastomer and vinyl
Any one in elastomer.The toughness of above-mentioned material is good, tearing toughness is high.
It should be noted that in all embodiments of the utility model, elastomer can also be other materials, this practicality
It is novel without limitation.
Those skilled in the art can be set according to actual needs the thickness of each film layer.
The composite diaphragm has thermal stability, temperature tolerance and damping characteristic good, and service life is long, and vibrating effect is good
Feature.
In other examples, two surface layers are made by engineering plastics or elastomer.
In one example, as shown in Fig. 2, composite diaphragm includes four film layers to fit together.Wherein, two surface layers
It is made by engineering plastics, to form the engineering plastic bed of material 1.One in two middle layers damps for carbon nanotube blending and modifying
Layer 2, another is made by elastomer, to form elastomer layer 3.
Alternatively, as shown in figure 3, two surface layers are made by elastomer, to form elastomer layer 3.In two middle layers
One be carbon nanotube blending and modifying damping layer 2, another is made by engineering plastics, to form the engineering plastic bed of material 1.
Carbon nanotube blending and modifying damping layer 2 have good adhesive property, can directly with the engineering plastic bed of material 1 and/or
Elastomer layer 3 bonds together.Hot pressing fitting or the Nian Jie side of binder may be used in elastomer layer 3 and the engineering plastic bed of material 1
Formula fits together.
Optionally, engineering plastics are polyether-ether-ketone, polyarylate, polyetherimide, polyimides, polyphenylene sulfide, poly- naphthalene two
Any one in formic acid glycol ester and polyethylene terephthalate.The toughness of above-mentioned material is good, tearing toughness
It is high.
Optionally, elastomer is styrenic elastomer, olefin type elastomer, diene class elastomer, polyvinyl chloride-base elasticity
Body, urethane class elastomer, esters elastomer, amides elastomer, organic fluoride class elastomer, organic silicon elastomer and vinyl
Any one in elastomer.The toughness of above-mentioned material is good, tearing toughness is high.
In this example embodiment, multiple engineering plastic bed of materials 1 or elastomer layer 3 can be existed simultaneously.Those skilled in the art can
The thickness of each film layer to be arranged according to actual needs.
The composite diaphragm has thermal stability, temperature tolerance and damping characteristic good, and service life is long, and vibrating effect is good
Feature.
In one example, as shown in figure 4, composite diaphragm includes five film layers to fit together.Wherein, two surface layers
It is made by engineering plastics, to form the engineering plastic bed of material 1.One in three middle layers damps for carbon nanotube blending and modifying
Layer 2, other two is made by elastomer, to form elastomer layer 3.Carbon nanotube blending and modifying damping layer 2 is located at two
Between elastomer layer 3.
Alternatively, as shown in figure 5, two surface layers are made by elastomer, to form elastomer layer 3.In three middle layers
One be carbon nanotube blending and modifying damping layer 2, other two is made by engineering plastics, to form the engineering plastic bed of material 1.
Carbon nanotube blending and modifying damping layer 2 is located between two engineering plastic bed of materials 1.
Alternatively, as shown in figure 8, two surface layers and a middle layer are made by engineering plastics, to form engineering plastics
Layer 1.Other two middle layer is carbon nanotube blending and modifying damping layer 2.The engineering plastic bed of material 1 as middle layer is located at two carbon
Between nanotube blending and modifying damping layer 2.The engineering plastic bed of material 1 is staggered with carbon nanotube blending and modifying damping layer 2.
Carbon nanotube blending and modifying damping layer 2 can directly bond together with elastomer layer 3 and/or the engineering plastic bed of material 1.
Hot pressing fitting may be used in elastomer layer 3 and the engineering plastic bed of material 1 or the Nian Jie mode of binder fits together.
Optionally, engineering plastics are polyether-ether-ketone, polyarylate, polyetherimide, polyimides, polyphenylene sulfide, poly- naphthalene two
Any one in formic acid glycol ester and polyethylene terephthalate.The toughness of above-mentioned material is good, tearing toughness
It is high.
Optionally, elastomer is styrenic elastomer, olefin type elastomer, diene class elastomer, polyvinyl chloride-base elasticity
Body, urethane class elastomer, esters elastomer, amides elastomer, organic fluoride class elastomer, organic silicon elastomer and vinyl
Any one in elastomer.The toughness of above-mentioned material is good, tearing toughness is high.
In this example embodiment, multiple engineering plastics film layers or elastomeric film layer can be existed simultaneously.Those skilled in the art
It can be set according to actual needs the thickness of each film layer.
The composite diaphragm has thermal stability, temperature tolerance and damping characteristic good, and service life is long, and vibrating effect is good
Feature.
In one example, as shown in fig. 6, composite diaphragm includes five film layers to fit together.Wherein, two surface layers
It is made by engineering plastics, to form the engineering plastic bed of material 1；Two in three middle layers damp for carbon nanotube blending and modifying
Layer 2, another is made by elastomer, and to form elastomer layer 3, elastomer layer 3 is located at two carbon nanotube blendings and changes
Between property damping layer 2.
Alternatively, as shown in fig. 7, two surface layers are made by elastomer, to form elastomer layer 3.In three middle layers
Two be carbon nanotube blending and modifying damping layer 2, another is made by engineering plastics, to form the engineering plastic bed of material 1.
The engineering plastic bed of material 1 is located between two carbon nanotube blending and modifying damping layers 2.
Alternatively, as shown in figure 9, two surface layers and a middle layer are made by elastomer, to form elastomer layer 3.
Other two middle layer is carbon nanotube blending and modifying damping layer 2.Elastomer layer 3 as middle layer is located at two carbon nanotubes
Between blending and modifying damping layer 2.Carbon nanotube blending and modifying damping layer 2 and elastomer layer 3 are staggered.
Carbon nanotube blending and modifying damping layer 2 can directly bond together with the engineering plastic bed of material 1 and/or elastomer layer 3.
Hot pressing fitting may be used in elastomer layer 3 and the engineering plastic bed of material 1 or the mode of binder bonding fits together.
Optionally, engineering plastics are polyether-ether-ketone, polyarylate, polyetherimide, polyimides, polyphenylene sulfide, poly- naphthalene two
Any one in formic acid glycol ester and polyethylene terephthalate.The toughness of above-mentioned material is good, tearing toughness
It is high.
Optionally, elastomer is styrenic elastomer, olefin type elastomer, diene class elastomer, polyvinyl chloride-base elasticity
Body, urethane class elastomer, esters elastomer, amides elastomer, organic fluoride class elastomer, organic silicon elastomer and vinyl
Any one in elastomer.The toughness of above-mentioned material is good, tearing toughness is high.
In this example embodiment, multiple engineering plastics film layers or elastomeric film layer can be existed simultaneously.Those skilled in the art
It can be set according to actual needs the thickness of each film layer.
The composite diaphragm has thermal stability, temperature tolerance and damping characteristic good, and service life is long, and vibrating effect is good
Feature.
The structure of composite diaphragm is not limited to above-mentioned several, and those skilled in the art may set according to actual needs.
Other side according to the present utility model provides a kind of sound-producing device.The sound-producing device includes that this practicality is new
The composite diaphragm that type provides.
The sound-producing device has the characteristics that service life is long, temperature tolerance is good, noise is small, sounding effect is good.
Although some specific embodiments of the utility model are described in detail by example, this field
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
It modifies.The scope of the utility model is defined by the following claims.
Claims (10)
1. a kind of composite diaphragm for sound-producing device, which is characterized in that including two surface layers and at least one carbon nanotube
Blending and modifying damping layer, at least one carbon nanotube blending and modifying damping layer are located between two surface layers, the carbon
Nanotube blending and modifying damping layer have adhesive property, the carbon nanotube blending and modifying damping layer directly with two surface layers
It is bonded together.
2. composite diaphragm according to claim 1, which is characterized in that the surface layer is made by engineering plastics or elastomer
It forms.
3. composite diaphragm according to claim 2, which is characterized in that including three film layers to fit together, wherein institute
Carbon nanotube blending and modifying damping layer is stated to be bonded together with two surface layers.
4. composite diaphragm according to claim 1, which is characterized in that including four film layers to fit together, wherein two
A surface layer is made by engineering plastics, and one in two middle layers is the carbon nanotube blending and modifying damping layer,
Another is made by elastomer；Or
Two surface layers are made by elastomer, and one in two middle layers damps for the carbon nanotube blending and modifying
Layer, another is made by engineering plastics.
5. composite diaphragm according to claim 1, which is characterized in that including five film layers to fit together, wherein two
A surface layer is made by engineering plastics, and one in three middle layers is the carbon nanotube blending and modifying damping layer,
Other two is made by elastomer, and the carbon nanotube blending and modifying damping layer is located between two elastomer layers；Or
Two surface layers are made by elastomer, and one in three middle layers damps for the carbon nanotube blending and modifying
Layer, other two is made by engineering plastics, the carbon nanotube blending and modifying damping layer be located at two engineering plastic bed of materials it
Between；Or
Two surface layers and a middle layer are made by engineering plastics, other two middle layer is total for the carbon nanotube
Mixed modification damping layer, the engineering plastic bed of material as middle layer are located between two carbon nanotube blending and modifying damping layers.
6. composite diaphragm according to claim 1, which is characterized in that including five film layers to fit together, wherein two
A surface layer is made by engineering plastics, and two in three middle layers are the carbon nanotube blending and modifying damping layer,
Another is made by elastomer, and elastomer layer is located between two carbon nanotube blending and modifying damping layers；Or
Two surface layers are made by elastomer, and two in three middle layers damp for the carbon nanotube blending and modifying
Layer, another is made by engineering plastics, the engineering plastic bed of material be located at two carbon nanotube blending and modifying damping layers it
Between；Or
Two surface layers and a middle layer are made by elastomer, other two middle layer is blended for the carbon nanotube
Modified damping layer, the elastomer layer as middle layer are located between two carbon nanotube blending and modifying damping layers.
7. according to the composite diaphragm described in any one in claim 2-6, which is characterized in that including being made by engineering plastics
Made of film layer, the engineering plastics be polyether-ether-ketone, polyarylate, polyetherimide, polyimides, polyphenylene sulfide, poly- naphthalene two
Any one in formic acid glycol ester and polyethylene terephthalate.
8. according to the composite diaphragm described in any one in claim 2-6, which is characterized in that including by elastomer make and
At film layer, the elastomer be styrenic elastomer, olefin type elastomer, diene class elastomer, polyvinyl chloride-base elastomer,
Urethane class elastomer, esters elastomer, amides elastomer, organic fluoride class elastomer, organic silicon elastomer and vinyl bullet
Any one in property body.
9. composite diaphragm according to claim 1, which is characterized in that for making the carbon nanotube blending and modifying damping
The damping glue of layer is acrylic compounds glue or organic silicon glue.
10. a kind of sound-producing device, which is characterized in that include the composite diaphragm as described in any one in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721211535.9U CN207802347U (en) | 2017-09-20 | 2017-09-20 | Composite diaphragm and sound-producing device for sound-producing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721211535.9U CN207802347U (en) | 2017-09-20 | 2017-09-20 | Composite diaphragm and sound-producing device for sound-producing device |
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| CN207802347U true CN207802347U (en) | 2018-08-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804154A (en) * | 2019-10-31 | 2020-02-18 | 歌尔股份有限公司 | Sound generating device's vibrating diaphragm and sound generating device |
| CN114827842A (en) * | 2022-03-30 | 2022-07-29 | 歌尔股份有限公司 | Ball top, vibrating diaphragm subassembly, sound generating mechanism and electronic equipment |
-
2017
- 2017-09-20 CN CN201721211535.9U patent/CN207802347U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804154A (en) * | 2019-10-31 | 2020-02-18 | 歌尔股份有限公司 | Sound generating device's vibrating diaphragm and sound generating device |
| WO2021082251A1 (en) * | 2019-10-31 | 2021-05-06 | 歌尔股份有限公司 | Vibrating diaphragm for sound-producing device and sound-producing device |
| CN114827842A (en) * | 2022-03-30 | 2022-07-29 | 歌尔股份有限公司 | Ball top, vibrating diaphragm subassembly, sound generating mechanism and electronic equipment |
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