Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent
1997-05-28
1998-08-04
Le, Huyen
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
381194, H04R 2500
Patent
active
057906823
ABSTRACT:
A butterfly damper for preventing an adhesion surface between a speaker frame (6) and an outer peripheral frame (12) from peeling off is provided. The butterfly damper comprises an inside peripheral flame (11), an outer peripheral flame (12) and a plurality of movable arms (13), all of which are formed in a single piece by injection molding of thermoplastic synthetic resin. The thickness T of the outer peripheral flame (12) is thicker than the thickness t of the movable arms (13). In addition, the front and back faces of the outer peripheral flame (12) are formed so that each face protrudes toward the thickness direction respectively from the front face and the back face of the movable arms (13).
REFERENCES:
patent: 1907687 (1933-05-01), Van Lis
patent: 2147605 (1939-12-01), Lissauer
Hachiya Satoshi
Ito Masanori
Sato Masatoshi
Le Huyen
Pioneer Electronic Corporation
Tohoku Pioneer Electronic Corporation
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