The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2014
Filed:
Jan. 21, 2009
Applicant:
Osamu Funahashi, Mie, JP;
Inventor:
Osamu Funahashi, Mie, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 7/00 (2006.01); H04R 9/06 (2006.01); G10K 13/00 (2006.01); H04R 7/12 (2006.01); H04R 31/00 (2006.01);
U.S. Cl.
CPC ...
H04R 7/125 (2013.01); H04R 2307/029 (2013.01); H04R 2307/021 (2013.01); H04R 31/003 (2013.01);
Abstract
A speaker diaphragm includes a fabric layer in which impregnated thermosetting resin is thermally cured, and a paper layer integrated on a rear face of this fabric layer. Fluffs of the paper layer filling stitches of the fabric layer are entangled with threads of the fabric layer from a surface of the fabric layer, and are firmly fixed by thermosetting resin. This integrates the layers in the state that the paper layer is filled in the stitches of the fabric layer. Accordingly, internal loss and Young's modulus of the speaker diaphragm can be increased. As a result, the speaker sound quality can be improved.