Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS5244628 October 3, 1975 Diaphragm for speaker 2 inventor 3 Patent applicant address Osaka Prefecture Kadoma city Oda Kamon address 1006 Name (582) Matsushita Electric Industrial Co., Ltd. Representative Masaharu Matsushita 4 Agent 〒 571 Address Osaka Prefecture Kadoma City Ozamon Kamonshin Address 1006 5 List of Attachments ms ■ Japan Patent Office ■ JP 52446280 Published Nissho 52. (1977) 4.7 Japanese Patent Application No. 50- / 20 / ': I2 Inside the Office No. 64-6555 A method of adding a suitable amount of glass fiber or the like is carried out for the speaker diaphragm 3, detailed description of the invention The present invention relates to an acoustic device, particularly to a diaphragm of a speaker, which has a high elasticity and a large specific modulus and a suitable internal modulus by forming a zirconia fiber into a paper shape or mixing it with a pulp or other organic fiber material. It is an object of the present invention to provide a diaphragm having a loss. Heretofore, as a speaker imitation plate, a large number of paper-made molded articles of pulp and other fiber materials are used, and metal domes and plastic films are also put to practical use for high-pitched sound reproduction. In general, the paper hole diaphragm has a small rigidity and elastic modulus, and in order to improve its defects, a highly elastic twill weave, for example, a carbon fiber or a combination of .quadrature. There was a drawback such as the workability in the case of The present invention eliminates the above-mentioned conventional defects, and in particular provides a speaker diaphragm having an improved elastic modulus, and is characterized by using a zirconium oxide fiber. Zirconium oxide fiber (hereinafter referred to as zirconia a fiber) has a large elastic modulus, and its surface is chemically active and has excellent affinity with organic fibers, so that the adhesive property of the fibers with each other in mixing and forming with pulp etc. It has been found that a diaphragm having a wide range of 51 power factor can be obtained by the addition amount thereof. The details will be described below with reference to examples. 〔 Example〕? 1 out of 97 topal 7 ′ ′ (j = 2o 811 L) zirconia fiber I (thickness aμ 彎 length 20. ) And add 5% to 60%, acrylic gothic ester and melamine resin as 4EndPage: 1 binder respectively. The mixed paper was made with s% & m, and the dry forming was performed at 120 ° C 1 Kg / r: d by hot press. The result is the characteristic of A in the figure. Similarly, a comparison result 10-05-2019 1 in the case of mixing glass fiber (8 μ, 20 U in each case) is shown by B in the figure. As apparent from the figure, when glass fiber or carbon fiber is mixed with pulp, the specific elastic modulus is maximized at the addition amount of 5 to 10%, and if it is added more than that, the bonding between the a-planes of the molding becomes worse Although the elastic modulus did not improve, it was found that when zirconia 1a fiber is used, the specific elastic modulus is also greatly improved along with the increase of the addition amount up to about 30%. As described above, according to the present invention, since the elastic modulus is improved as compared with the conventional fine plate mainly made of pulp, it is possible to expand the surrounding area regeneration characteristic, and it is possible to arbitrarily obtain the elastic modulus by the addition amount. It has the advantage of being able to provide a speaker diaphragm that is excellent in any point, which makes it possible to improve the heat resistance of the marble. 4 is a diagram showing the specific elastic modulus of the speaker diaphragm A of the present invention and the conventional speaker diaphragm B according to the drawings. Name of agent Attorney Nakano Toshio et al. 1 person OIo 203 040 zirconia glass 蝮 I 庄 Containing 匍 (匍 6 Inventors and agents other than the above (1) Inventors (2) Agent address Osaka Prefecture Kadoshi city Oji Kadoma Street EndPage: 2 10-05-2019 2
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