Structure for the sound coil of loudspeaker

Details Structure for the sound coil of loudspeaker Structure for the sound coil of loudspeaker

2006-12-05

2006-12-05

Ni, Suhan (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S400000, C381S410000

Reexamination Certificate

active

07146020

ABSTRACT:
An improved structure for the sound coil of loudspeaker comprises a cylinder provided with multiple layers of coils surrounding one end thereon. The coils are divided into sections in the middle position which provide more than two conducting wires. The cylinder is rolled by a single plate and is provided with four layers of coils. The conducting wire extends to the other end of cylinder and is wrapped with oilpaper; and connects to a piece of thick wire. The cylinder is provided with several ventilation holes. Every two layers of coil being a independent wire material, the sound coil comprised four conducting wires; or each layer of coil being a independent wire material, the sound coil comprised eight conducting wires. Thus the sound coil produces larger output power and reduces the size of sound coil, the coils surrounding the cylinder, production costs, and the size of products.

REFERENCES:
patent: 2922850 (1960-01-01), Zuerker
patent: 4300022 (1981-11-01), Hastings-James et al.
patent: 4539442 (1985-09-01), Puls et al.
patent: 5249236 (1993-09-01), Sakamoto
patent: 6421449 (2002-07-01), Hasegawa et al.
patent: 6587571 (2003-07-01), Fujihira et al.

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