Carbon fiber woven ball top, vibrating diaphragm structure and manufacturing method

[0019] Example 1

[0020] A carbon fiber braided dome is composed of carbon fiber cloth. In the present invention, the carbon fiber cloth can be one layer or a composite of multiple layers of carbon fiber cloth, and each layer of carbon fiber cloth can be combined by bonding or weaving.

[0021] Such as figure 1 As shown, in the present invention, the carbon fiber cloth has different weaving ratios in the vertical and horizontal directions, so that unidirectional strength can be provided so that it can adapt to different shapes of domes. The weaving ratio of carbon fiber cloth includes aspect ratio 1:20~1:2. The so-called aspect ratio refers to the ratio of the width (diameter) d1 of the longitudinal carbon fiber filament 1 to the distance d2 between two adjacent longitudinal carbon fiber filaments 1 , That is, d1:d2 is 1:20 to 1:2. in figure 1 Here, the aspect ratio between the so-called longitudinal carbon fiber filaments 1 and the transverse carbon fiber filaments is 1:3. Of course, as mentioned above, the dome can also be composed of multiple layers of carbon fiber cloth with different aspect ratios.

[0022] In the present invention, the tensile modulus of the carbon fiber yarn is 300 Gpa or more. For example, T1000 or more series carbon fiber yarns of "Toray" or all M series carbon fiber yarns can be used. The single-layer carbon fiber cloth with different aspect ratios is woven using such carbon fiber filaments, and the thickness ranges from 20 to 200um, preferably from 80 to 150um. Then cut into the required shape (including laser cutting, trimming die cutting, die cutting machine die cutting, etc.).

[0023] Further, the carbon fiber cloth in the present invention can be treated with resin prepreg. The prepreg resin includes epoxy resin, PEEK (polyether ether ketone), PI (polyimide), PPS (polyphenylene sulfide), PBO ( Poly(p-phenylene benzodioxazole), aramid 1414, etc. The woven carbon fiber cloth can be directly immersed in the above resin solution, or the carbon fiber filaments can be immersed in the above resin solution. Compared with the former, the latter can make each carbon fiber filament be wrapped in resin, and the prepreg effect is better. The prepreg treated carbon fiber filaments are woven into the above-mentioned carbon fiber cloth.

[0024] Refer to figure 2 , Which is a diaphragm structure made of the carbon fiber woven dome of the present invention, which includes a sound film 3 and a carbon fiber woven dome 4 located on the sound film 3. The carbon fiber woven dome 4 can be glued or coated The sound film 3 is bonded together with glue or the like.

[0025] The dome is made of carbon fiber cloth with different ratios in the vertical and horizontal directions, which can provide unidirectional strength without scratching, delamination and other phenomena of the aluminum foil dome; meanwhile, the thickness of the dome can be reduced. The use of high tensile modulus carbon fiber has high strength; carbon fiber has good water resistance, making the made dome better waterproof; the bonding effect between carbon fiber layers is good, and it is not easy to delamination. After coating or backing Can be used directly after glue.

[0026] Example 2

[0027] Combine below image 3 The manufacturing method of the carbon fiber woven dome and diaphragm structure in the present invention is further introduced.

[0028] S100: Prepare carbon fiber yarn. The tensile modulus of the carbon fiber filaments is above 300 Gpa. Further, the carbon fiber filaments are carbon fiber filaments that have undergone resin prepreg treatment. Pre-impregnated resins include epoxy resin, PEEK (polyether ether ketone), PI (polyimide), PPS (polyphenylene sulfide), PBO (poly-p-phenylene benzodioxazole), aramid 1414, etc.

[0029] S300: Weaving the carbon fiber filaments in step S100 into a single-layer carbon fiber cloth with different aspect ratios. The aspect ratio of the carbon fiber cloth is 1:20 to 1:2, and the thickness ranges from 20 to 200um, preferably 80 to 150um.

[0030] S500: Cutting to form a carbon fiber dome, for example, laser cutting, trimming die punching, die cutting machine die cutting, etc. can be used.

[0031] S700: Bond the cut carbon fiber woven dome with the sound diaphragm to form a diaphragm structure. Finally, the diaphragm structure can be further assembled into a speaker.

[0032] When the carbon fiber filaments in step S100 have not undergone prepreg treatment, a step S400 can be added between steps S300 and S500: the carbon fiber cloth is subjected to resin prepreg treatment. The prepreg resin can be the same resin as in step S100. Of course, step S400 may also be: compounding multiple layers of carbon fiber cloth.