Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Patent
1996-03-28
1998-12-08
Le, Huyen
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
381403, 381345, 181171, H04R 2500
Patent
active
058481737
ABSTRACT:
A cylindrical frame is mounted in a cabinet and a magnetic circuit is provided at an end of the frame. A diaphragm having a peripheral free edge is connected to a coil bobbin and a cylindrical ring is secured to the free end edge and disposed in a cylindrical supporting portion of the frame. An annular sealing member is secured to the cylindrical ring so that an outside peripheral wall thereof is slidably contacted with an inside wall of the cylindrical supporting portion of the frame.
REFERENCES:
patent: 3925626 (1975-12-01), Stallings, Jr.
patent: 4235302 (1980-11-01), Tsukamoto
patent: 4384174 (1983-05-01), Suzuki et al.
patent: 4427845 (1984-01-01), Yoshida et al.
patent: 4609784 (1986-09-01), Miller
Ando Tatsuya
Baba Teruo
Kogure Kohshiro
Koyano Shinji
Kumada Satoshi
Le Huyen
Pioneer Electronic Corporation
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