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. 16, 2002
Filed:
May. 31, 2000
Mitsutaka Enomoto, Mie, JP;
Masakuni Hirata, Osaka, JP;
Takanori Fukuyama, Mie, JP;
Mitsukazu Kuze, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An electro-mechanical-audio converter and an electro-mechanical-audio converting device using the same employed in mobile terminals such as mobile phones for generating paging vibration which realizes stable vibration function. The electro-mechanical-audio converter includes a housing ( ), movable part ( ), forming a magnetic circuit, mounted on an opening of the housing ( ) through a suspension ( ); and a detection coil ( ) disposed near the movable part ( ) for generating excitation voltage by vibration of the movable part ( ). Strong vibration of the movable part ( ) during resonance is detected by the detection coil ( ) as an excitation voltage, and fed back. Accordingly, the electro-mechanical-audio converter and electro-mechanical-audio converting device using the same having an extremely stable vibration function, even when resonance frequency changes due to environmental changes such as ambient temperature, is made feasible.