Loudspeaker apparatus

Details Loudspeaker apparatus Loudspeaker apparatus

2005-09-22

2009-08-25

Le, Huyen D (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S398000, C381S423000

Reexamination Certificate

active

07580542

ABSTRACT:
A loudspeaker apparatus in which a diaphragm is reinforced easily and favorably. The loudspeaker apparatus includes a loudspeaker diaphragm formed by joining a domed diaphragm and an edge-like diaphragm and vibrated using a voice coil, and a reinforcement ring reinforcing a junctional flat portion or the vicinity of the junctional flat portion of the diaphragm. The reinforcement ring is formed of a permeable material, and the permeable reinforcement ring is stuck to the junctional flat portion or the vicinity of the junctional flat portion of the diaphragm.

REFERENCES:
patent: 2084945 (1937-06-01), Cornwell
patent: 4531608 (1985-07-01), Heinz
patent: 6359996 (2002-03-01), Ohashi
patent: 55-68893 (1980-12-01), None
patent: 2003-348691 (2003-12-01), None
patent: 2003-348691 (2003-12-01), None
patent: 2004-023297 (2004-01-01), None

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