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. 25, 2007
Filed:
May. 28, 2003
Yoshio Ohashi, Kanagawa, JP;
Masaru Uryu, Chiba, JP;
Naotaka Tsunoda, Tokyo, JP;
Takeshi Hara, Kanagawa, JP;
Yoshio Ohashi, Kanagawa, JP;
Masaru Uryu, Chiba, JP;
Naotaka Tsunoda, Tokyo, JP;
Takeshi Hara, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A loudspeaker deviceincludes an acoustic diaphragmcomposed of a domed diaphragm, an edge-like diaphragm, and a junctional flat portionwhich joins those domed and edge-like diaphragms, and a joined portionwhere an end surface of a bobbinof a voice coil or of a conductive 1-turn ringis stuck and fixed to the junctional flat portionor a reinforcement ring; and the reinforcement ringis stuck and fixed to the junctional flat portionfrom above or from under, thereby increasing the mechanical strength of the junctional flat portionof the acoustic diaphragm. A loudspeaker device in which unnecessary vibrations are removed and also the quality of acoustic signals is excellent up to high range is provided.