Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1991-07-12
1992-10-20
Ng, Jin F.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
381193, 381194, 381199, H04R 2500
Patent
active
051577313
ABSTRACT:
A dome radiator speaker has a yoke, an annular magnet mounted on the yoke, an annular plate mounted on the magnet, and a diaphragm sheet. The diaphragm sheet has a domed diaphragm, an annular voice coil housing having a U-shaped section surrounding the diaphragm, an annular damper around the voice coil housing, and an engaging recess formed on the underside of the diaphragm sheet at a peripheral portion of the damper. A voice coil is provided in the voice coil housing, and the voice coil housing is inserted in a gap between the pole and the annular plate. The recess is engaged with an annular projection formed on the plate. A frame is mounted on the plate for securing the damper on the plate.
REFERENCES:
patent: 2392143 (1946-01-01), Graham
patent: 3867586 (1975-02-01), Maekawa et al.
patent: 4315112 (1982-02-01), Hofer
patent: 4554414 (1985-11-01), House
patent: 4565905 (1986-01-01), Nation
patent: 4752963 (1988-06-01), Yamazaki et al.
patent: 5099949 (1992-03-01), Mitobe
Le Huyen D.
Ng Jin F.
Pioneer Electronic Corporation
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