CN213638197U - Novel dome membrane for dome-shaped loudspeaker diaphragm - Google Patents
Novel dome membrane for dome-shaped loudspeaker diaphragm Download PDFInfo
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- CN213638197U CN213638197U CN202023045408.0U CN202023045408U CN213638197U CN 213638197 U CN213638197 U CN 213638197U CN 202023045408 U CN202023045408 U CN 202023045408U CN 213638197 U CN213638197 U CN 213638197U
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Abstract
The utility model relates to a bonding apparatus technical field, specifically speaking relates to a novel dome membrane for dome shape loudspeaker diaphragm. The foaming layer is positioned in the center, the upper surface and the lower surface of the foaming layer are respectively provided with a nano toughening layer, and the outer surfaces of the two nano toughening layers are respectively provided with a carbon fiber layer. The utility model discloses a replace traditional aluminium foil with the fibrous layer, improved intensity, reduced thickness for the sound quality obtains promoting, has avoided the phenomenon of interlaminar readily releasable, has guaranteed life, simultaneously, adopts the nanofiber membrane that has toughening effect as the strengthening layer, has not only improved ball top shock resistance and interlaminar shear behavior, has reduced fracture and layering between the layer, moreover, very big improvement the fatigue life of ball top material.
Description
Technical Field
The utility model relates to a bonding apparatus technical field, specifically speaking relates to a novel dome membrane for dome shape loudspeaker diaphragm.
Background
The dome-shaped loudspeaker is a loudspeaker which directly radiates sound waves by utilizing a dome-shaped vibrating diaphragm, belongs to an electrodynamic loudspeaker, and is characterized in that high-frequency response is good, directivity is wide, and distortion is small. The top of the diaphragm is usually made of aluminum foil and foam material, and with the development of the electronic industry, the performance and reliability of the electroacoustic system need to be continuously improved, and the requirements on the top of the ball are higher and higher. The existing ball top compounded by aluminum foil and foaming material can not meet the use requirement, and the problems of aluminum foil fragmentation, aluminum foil and foaming material layering, insufficient material strength and the like often occur. On the other hand, the aluminum foil is soft and is easy to cause pollution, scratch and other phenomena as an intuitive and observable part of a product, so that the problem of unattractive appearance is caused, and the foaming material is easy to deform under stress, poor in recovery performance after stress, incapable of bearing pressure and easy to absorb water, so that the phenomenon of layering between the aluminum foil and the foaming material is easy to generate.
In view of this, a carbon fiber ball top material is introduced in the market. At present, the carbon fiber ball tops in the market are all manufactured by adopting unidirectionally extending carbon fiber bundles, pre-dipping the carbon fiber bundles by resin and hot-pressing and compounding the carbon fiber bundles and a foaming material for molding. This kind of ball top is through replacing traditional aluminium foil with carbon fiber unidirectional tape preimpregnation material, has improved intensity, has reduced thickness simultaneously for the sound quality obtains promoting, through the curing process of preimpregnation material, makes carbon fiber unidirectional tape and expanded material closely laminate, thereby has avoided the phenomenon of interlaminar readily releasable between the layer, has guaranteed life.
However, the carbon fiber ball top is made of unidirectional carbon fiber prepreg through hot-pressing composite molding, and although the unidirectional carbon fiber prepreg has the advantage of high strength in one direction, the ball top is easy to break in the other direction, which causes defects. Therefore, a carbon fiber ball top with high strength and high reliability is needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel dome membrane for dome shape loudspeaker diaphragm solves above technical problem.
In order to solve the above problems, the utility model adopts the following technical scheme:
a novel dome membrane for a dome-shaped loudspeaker diaphragm, characterized in that: the foaming layer is positioned in the center, the upper surface and the lower surface of the foaming layer are respectively provided with a nano toughening layer, and the outer surfaces of the two nano toughening layers are respectively provided with a carbon fiber layer.
Preferably, the thickness of the foaming layer is 70 to 250 μm.
Preferably, the nano toughening layer is a thermoplastic nanofiber membrane with the thickness of 5-20 μm.
Preferably, the tensile modulus of the carbon fiber layer is more than 200Gpa, and the thickness is 30-80 μm.
Has the advantages that: compared with the prior art, the utility model discloses a with the traditional aluminium foil of carbon fiber layer replacement, improved intensity, reduced thickness for the sound quality obtains promoting, has avoided the phenomenon of layer-to-layer easy separation, has guaranteed life, simultaneously, adopts the nanofiber membrane that has toughening effect as the strengthening layer, has not only improved ball crown shock resistance and interlaminar shear behavior, has reduced fracture and layering between the layer, moreover, very big improvement the fatigue life of ball crown material.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Examples
Referring to fig. 1, the novel dome membrane for a dome-shaped loudspeaker diaphragm in this embodiment includes a foaming layer 1 located at the center, the upper and lower surfaces of the foaming layer 1 are respectively provided with a nano toughening layer 2, and the outer surfaces of the two nano toughening layers 2 are respectively provided with a carbon fiber layer 3.
The foaming layer 1 is formed by foaming one or more materials of Polymethacrylimide (PMI), foaming polyphenylene sulfide (PPS), microporous foaming plastic (MCP) and foaming polypropylene (PP), preferably, the foaming layer is formed by foaming Polymethacrylimide (PMI) and has the thickness of 70-250 mu m.
The nano toughening layer 2 is a thermoplastic nanofiber membrane (prepared by an electrostatic spinning process), and the thickness is 5-20 μm.
The carbon fiber layer 3 is prepared by pre-soaking carbon fiber materials in resin and then curing at high temperature and high pressure, and has the tensile modulus of more than 200Gpa and the thickness of 30-80 mu m.
The above is only the embodiment of the present invention, not so limit on the other hand through the patent scope of the present invention, all utilize the equivalent structure made in the specification and the attached drawings, directly or indirectly apply to other related technical fields, all with the same principle within the patent protection scope of the present invention.
Claims (4)
1. A novel dome membrane for a dome-shaped loudspeaker diaphragm, characterized in that: the foaming layer (1) is located in the center, the upper surface and the lower surface of the foaming layer (1) are respectively provided with a nano toughening layer (2), and the outer surfaces of the two nano toughening layers (2) are respectively provided with a carbon fiber layer (3).
2. The novel dome membrane for a dome-shaped loudspeaker diaphragm of claim 1, wherein: the thickness of the foaming layer (1) is 70-250 μm.
3. The novel dome membrane for a dome-shaped loudspeaker diaphragm of claim 1, wherein: the nano toughening layer (2) is a thermoplastic nanofiber membrane with the thickness of 5-20 mu m.
4. The novel dome membrane for a dome-shaped loudspeaker diaphragm of claim 1, wherein: the tensile modulus of the carbon fiber layer (3) is more than 200Gpa, and the thickness is 30-80 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023045408.0U CN213638197U (en) | 2020-12-16 | 2020-12-16 | Novel dome membrane for dome-shaped loudspeaker diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023045408.0U CN213638197U (en) | 2020-12-16 | 2020-12-16 | Novel dome membrane for dome-shaped loudspeaker diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213638197U true CN213638197U (en) | 2021-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023045408.0U Active CN213638197U (en) | 2020-12-16 | 2020-12-16 | Novel dome membrane for dome-shaped loudspeaker diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213638197U (en) |
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2020
- 2020-12-16 CN CN202023045408.0U patent/CN213638197U/en active Active
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