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:
Jun. 09, 2015
Filed:
Feb. 09, 2009
Tomohiko Kamimura, Osaka, JP;
Hideo Yuasa, Shandong, CN;
Jinlong Ren, Shandong, CN;
Hidenori Motonaga, Shandong, CN;
Katsunari Fujita, Shandong, CN;
Tomohiko Kamimura, Osaka, JP;
Hideo Yuasa, Shandong, CN;
Jinlong Ren, Shandong, CN;
Hidenori Motonaga, Shandong, CN;
Katsunari Fujita, Shandong, CN;
HOSIDEN CORPORATION, Yao-Shi, JP;
Abstract
An electroacoustic transducing device such as a small speaker or receiver used in a portable telephone or the like. A yoke-integral frame is formed by a simple process, and the number of components and production steps for producing the electroacoustic transducing device are reduced, thereby improving productivity. The transducing device having: a magnetic circuit having a yoke, a magnet, and a pole piece; a vibration system having a diaphragm and a voice coil; and a frame which holds the magnetic circuit and the vibration system. The voice coil is placed in a magnetic gap, and the frame is formed by performing a pressing process on one sheet-like metal material into a bottomed tubular shape, and at least two places of the bottom plate being cut and raised to form a bottom frame-like yoke portion, thereby being formed into a yoke-integral type.