Speaker having improved sound-radiating function to both...

Details Speaker having improved sound-radiating function to both... Speaker having improved sound-radiating function to both...

2005-05-16

2009-08-04

Ensey, Brian (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

C381S420000, C381S424000, C381S433000

Reexamination Certificate

active

07570774

ABSTRACT:
A speaker having an improved sound-radiating function to both directions is provided. The speaker includes a magnetic circuit unit, a voice coil, and an auxiliary vibrating plate and a primary vibrating plate sequentially arranged from a forward direction. The voice coil vibrates toward a backward direction and a forward direction due to interaction with the magnetic circuit unit. The auxiliary vibrating plate is cone-shaped and has a damping function. The primary vibrating plate is also cone-shaped. Central necks of the primary vibrating plate and the auxiliary vibrating plate are fixed on the voice coil, respectively. The auxiliary vibrating plate is enlarged toward a forward direction and the primary vibrating plate is enlarged toward a backward direction.

REFERENCES:
patent: 4281224 (1981-07-01), Castagna
patent: 4727586 (1988-02-01), Johnson
patent: 5157731 (1992-10-01), Mitobe
patent: 6343128 (2002-01-01), Coffin
patent: 6359997 (2002-03-01), Geisenberger et al.

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