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. 16, 2008
Filed:
Jul. 24, 2003
Oug-ki Lee, Seoul, KR;
Joo-bae Kim, Bucheon-shi, KR;
Oug-Ki Lee, Seoul, KR;
Joo-Bae Kim, Bucheon-shi, KR;
Phicom Corporation, Seoul, KR;
Abstract
In a bone conduction speaker, a body has a shape of a cylinder, and a vibrating plate is inserted to a mastoid to close an upper opening portion of the body. An auxiliary vibrating plate is inserted to the mastoid under the vibrating plate. A vibrating coil is attached on a lower side of the auxiliary vibrating plate. A speaker plate is fixed at an inner central portion of the body, and a ring type magnet is fixed on the speaker plate. An edge portion of a yoke is fixed on the ring type magnet and a central portion of the yoke has a protrusion which protrudes in the inside direction of a central hole of the speaker plate. An acoustic vibrating plate is fixed at a lower portion of the body, and an acoustic coil is fixed on the acoustic vibrating plate.