Speaker unit

Details Speaker unit Speaker unit

2006-09-05

2006-09-05

Le, Huyen (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S422000, C381S423000, C381S433000

Reexamination Certificate

active

07103195

ABSTRACT:
There is provided a speaker unit comprising: an elliptical vibrating diaphragm; a cylindrical voice coil secured at one end thereof on the center of the elliptical vibrating diaphragm; a frame structure for movably supporting the vibrating diaphragm, said frame structure being formed into a rectangular or elliptical shape and having a through hole in the center thereof; a magnetic circuit formed by (1) a top plate having a rectangular shape and having a through hole in the center thereof, (2) a plate-shaped magnet having a rectangular shape and having a through hole in the center thereof, (3) a back plate having a rectangular shape and having an upright pole on the center thereof. In this speaker unit, the top plate, the plate-shaped magnet and the back plate each has a width which is narrower than that of the frame structure in its shorter axis.

REFERENCES:
patent: 3079472 (1963-02-01), Sariti
patent: 4969196 (1990-11-01), Nakamura
patent: 2278251 (1994-11-01), None
patent: 355118299 (1980-09-01), None
patent: 405207590 (1993-08-01), None

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