Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2005-12-09
2009-08-11
Kuntz, Curtis (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S433000, C381S396000
Reexamination Certificate
active
07574013
ABSTRACT:
The speaker has a frame, a magnetic circuit, a voice coil body and a diaphragm. The magnetic circuit is disposed inside of the frame to form a magnetic gap. The voice coil body is disposed movably in the magnetic gap. The diaphragm is coupled to the voice coil body by an inner periphery edge thereof and to the frame by an outer periphery edge thereof. The outer peripheral surface of a convex portion provided on a bottom of the frame is at least either being brought into contact with or in proximity to the magnetic circuit. The configuration can provide the speaker with excellent heat dissipation characteristics.
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Supplementary European search report issued May 7, 2009 in connection with corresponding European Application No. 05 81 4753.
Ando Kimihiro
Asahi Yoichi
Funahashi Osamu
Umemura Kazuyoshi
Yoshida Seiichi
Kuntz Curtis
Panasonic Corporation
Robinson Ryan C
Wenderoth , Lind & Ponack, L.L.P.
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