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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNaraji Sakamoto, Shuji Saiki, Kazue Sato, Kousaku Murata, Hiroshi Yamamoto
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An acoustic diaphragm for speakers having a sandwich structure constituted by a core material comprising an elongated web material bent to have a plurality of radial projections, and upper and lower surface members adhered to the upper and lower edges of the core member, as well as a method of producing the same. The acoustic diaphragm of the invention has a reduced weight while exhibiting a large flexural rigidity so that the nodal line during the resonance vibration can have a circular form which in turn offers a circular form of nodal line and increased speaker power. Also, the method of producing the invention permits easy fabrication of the acoustic diaphragm having a sandwich structure.
An acoustic diaphragm for speakers having a sandwich structure constituted by a core member made of an elongated web and surface members adhered to the upper and lower edges of said web, characterized in that said web is alternatingly and successively turned at radially inner and outer portions of said surface members to have portions projected radially outwardly.
A method of producing an acoustic diaphragm for speakers comprising the steps of:
Dependencies are inferred from the claim text.