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:
May. 05, 2009
Filed:
Mar. 18, 2005
Minoru Ueda, Tokyo, JP;
Shoichi Kaneda, Tokyo, JP;
Kenji Ueno, Tokyo, JP;
Namiki Seimitsu Houseki, Tokyo, JP;
Abstract
A multifunction-type vibration actuator and a mobile terminal device capable of decreasing the lowest acoustic resonance frequency and preventing breakage of a coil lead as well as improving acoustic characteristics and preventing sound leaks. A portion near the outer periphery of a diaphragmis bent to form a rising portionextending along an inner peripheryof a housingtoward an open end thereof. This rising portionserves as a corrugation to decrease the lowest resonance frequency and the amplitude of vibration of which a fulcrum is served by the rising portionis not so large as that of the corrugation. Accordingly, the coil lead of a voice coilis not easily broken. Furthermore, an extending portionis formed to extend outward along a flat surfaceformed at the open end of a housingfrom a rising portion. This enlarges the entire radius of the diaphragmand improves the acoustic characteristics. Moreover, by arranging a flat surfaceof a housingparallel to an extending portionof a diaphragm, a gasket can easily be attached.