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|1. (WO2017150552) SPEAKER DIAPHRAGM, SPEAKER UNIT, AND RESIN FILM FOR SPEAKER DIAPHRAGM|
|Applicants:||SUMITOMO SEIKA CHEMICALS CO., LTD.
OASA ELECTRONICS CO., LTD.
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
|Title:||SPEAKER DIAPHRAGM, SPEAKER UNIT, AND RESIN FILM FOR SPEAKER DIAPHRAGM|
Disclosed is a speaker diaphragm 1 that comprises an accordion-folded film member which is folded back in a zig-zag pattern so that mountain sections, valley sections, and side-surface sections therebetween are repeatedly formed along a certain direction X. The gap between a pair of side-surface sections that face one another between neighboring mountain sections continuously widens from the valley section side to the mountain section side. The film member may also include an organic resin matrix and inorganic particles dispersed in the organic resin matrix.