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:
Apr. 27, 2010
Filed:
Oct. 26, 2005
Koji Takayama, Yamagata, JP;
Hiroyuki Kobayashi, Yamagata, JP;
Shinichi Hayasaka, Yamagata, JP;
Kazuki Yuze, Yamagata, JP;
Koji Takayama, Yamagata, JP;
Hiroyuki Kobayashi, Yamagata, JP;
Shinichi Hayasaka, Yamagata, JP;
Kazuki Yuze, Yamagata, JP;
Pioneer Corporation, Tokyo, JP;
Tohoku Pioneer Electronic Corporation, Yamagata, JP;
Abstract
A cross-sectionally substantially-semicircular portion of an edge portion adapted to connect an outer periphery of a diaphragm to a speaker frame is configured to have an uneven-thickness structure in which the thickness of the portion gradually decreases toward a sticking portion of an outer peripheral portion of the speaker frame from a sticking portion of the outer periphery of the diaphragm. Thus, the propagation characteristic of vibrations generated on the edge portion is improved. Disturbance is prevented from occurring in an mid-range frequency characteristic due to inverse resonance caused by the edge portion.