Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2005-12-06
2005-12-06
Tran, Sinh (Department: 2646)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S407000, C381S423000, C381S431000, C381S401000
Reexamination Certificate
active
06973194
ABSTRACT:
A speaker includes: a frame; a magnetic circuit fixed to the frame; a diaphragm fixed to the frame so as to be capable of vibrating in a predetermined direction; a driving force transmitting member connected to the diaphragm; and a damper for supporting the driving force transmitting member, wherein the magnetic circuit is positioned between a first plane and a second plane, the first plane being parallel to the diaphragm and defined as a plane with which at least a portion of the magnetic circuit is in contact, and the second plane being parallel to the diaphragm and defined as a plane with which at least a portion of the magnetic circuit is in contact, and one end of the damper is connected at a position between the first and second planes, and the other end of the damper is connected at another position between the first and second planes.
REFERENCES:
patent: 4584439 (1986-04-01), Paddock
patent: 6526151 (2003-02-01), Peng
patent: 6681026 (2004-01-01), Kam
patent: 6714655 (2004-03-01), Iwasa et al.
patent: 10-191494 (1998-07-01), None
Iwasa Mikio
Takewa Hiroyuki
Dabney Phylesha
Matsushita Electric - Industrial Co., Ltd.
RatnerPrestia
Tran Sinh
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