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:
Oct. 18, 2011
Filed:
Jun. 02, 2009
Tomohiko Kamimura, Osaka, JP;
Hideo Yuasa, Qingdao, CN;
Tomohiko Kamimura, Osaka, JP;
Hideo Yuasa, Qingdao, CN;
Hosiden Corporation, Yao-shi, Osaka, JP;
Abstract
The invention relates to a small speaker. A speakercomprises: a magnetic circuithaving a yoke, a magnet, and a pole piece; a vibration systemhaving a voice coiland diaphragmwhich are joined to each other through a voice coil bobbin; and a framewhich holds the magnetic circuitand the vibration system. The voice coil is placed in a magnetic gap. In the speaker, damperswhich are extended respectively from a plurality of places of an opening side end portion of the voice coil bobbin are disposed, and tip end portions of said dampers are bonded and fixed to the frame. The voice coil bobbin is supported from the lower side. The resistance to input is improved without impairing the thinness of the speaker, and while suppressing the increase of the production cost.