Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2007-01-30
2007-01-30
Tran, Sinh (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S432000
Reexamination Certificate
active
11045990
ABSTRACT:
A speaker apparatus has a frame to which a convex paper is attached. A bobbin with a voice coil is attached to the paper cone. A magnetic circuit is formed inside the frame. A damper suspending the bobbin is composed of a corrugation portion, which is positioned orthogonal to the bobbin in an inactivity of the speaker apparatus. The damper also includes a first leg portion extending forward along a vibration direction of the bobbin from an inner periphery end of the corrugation portion, and a second leg portion extending backward along the vibration direction of the bobbin from an outer periphery end of the corrugation portion. The first and second leg portions have substantially the same length.
REFERENCES:
patent: 2002/0034315 (2002-03-01), Auerbach et al.
patent: 2002/0051558 (2002-05-01), Kuze et al.
Murayama Kazuo
Suda Kazuyuki
Lerner David Littenberg Krumholz & Mentlik LLP
Sony Corporation
Tran Sinh
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