Diaphragm for loudspeaker

Abstract

Abstract PURPOSE:To simpify a work process and to improve the flexural rigidity by using a diaphragm obtained by sheet made of a natural fiber and a synthetic fiber, as a base material by sticking a thermosetting resin solution having a foaming property and bringing it to foaming hardening with heating. CONSTITUTION:A diaphragm base material 1 obtained by sheet making is formed by the mutual inter-fiber coupling of the natural fiber, the synthetic fiber or a fiber material 2 consisting of their mixture. There are spaces 3 between the fiber materials, the base plate 1 is dipped into the thermosetting resin solution having the foaming property and the solution is impregnated into he spaces 3. Thereafter it is brought to the foaming hardening with heating to obtain the diaphragm 4 for a speaker, and the diaphragm 4 is constituted with the fiber material 2 and the foaming material part 5 of the foaming thermosetting resin. In this way, a complicated work process and an unstable physical property, etc. are eliminated, a performance required for the diaphragm is satisfied and also the flexural rigidity can be improved.

Inventors

• 👤 Kazuharu Kawada
• 👤 一春 川田

Bibliographic Details