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:
Dec. 08, 2009
Filed:
Apr. 26, 2005
Kazuki Honda, Mie, JP;
Koji Sano, Mie, JP;
Tomoyasu Takase, Mie, JP;
Takanori Fukuyama, Mie, JP;
Mitsutaka Enomoto, Mie, JP;
Masahide Sumiyama, Mie, JP;
Kazuki Honda, Mie, JP;
Koji Sano, Mie, JP;
Tomoyasu Takase, Mie, JP;
Takanori Fukuyama, Mie, JP;
Mitsutaka Enomoto, Mie, JP;
Masahide Sumiyama, Mie, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An electro-acoustic transducer has a magnetic circuit, a frame, a diaphragm, a voice coil, a terminal, and a stopper. The frame is joined to a magnetic circuit. The diaphragm is joined to a circumferential edge of the frame. The voice coil is joined to the diaphragm and is partially provided at a magnetic gap of the magnetic circuit. The terminal is composed of a metal plate having spring property and conductivity, is partially fixed to the frame, and is electrically connected to the voice coil. The stopper is provided at an outer periphery of the metal plate of the terminal and extends from a main section of the terminal to the frame. The stopper restricts a bending range of the metal plate constituting the terminal to a level equal to or lower than a reversibility limit value of a metal material constituting the terminal.