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. 31, 2002
Filed:
Aug. 30, 2001
Youichi Gotoh, Sizuoka, JP;
Yoshiharu Oishi, Sizuoka, JP;
Takao Katsuki, Shizuoka, JP;
Susumu Tanikawa, Shizuoka, JP;
Morimasa Fushimi, Shizuoka, JP;
Star Micronics Co., Ltd., Shizuoka, JP;
Abstract
There is provided an electroacoustic transducer including a base made of magnetic material, a magnetic core made of magnetic material and provided erectly on the base a diaphragm made of magnetic material and supported with a gap between the diaphragm and a forward end of the magnetic core, a magnet constituting a magnetic circuit together with the base the magnetic core and the diaphragm so as to provide a magnetostatic field, a coil disposed around the magnetic core for applying an oscillating magnetic field to the magnetic circuit, a coil bobbin for holding the coil and a housing for receiving these above-mentioned members. The coil bobbin is integrally molded with the magnetic core and the base member