Electromagnetic sound generator

Details Electromagnetic sound generator Electromagnetic sound generator

1999-04-19

2000-02-08

Tran, Sinh

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

381431, 3403881, 34082546, H04R 2500

Patent

active

060235187

ABSTRACT:
A case is formed by an upper case and a lower case, and a buzzer is provided in the case. Two coil springs are securely mounted in holes formed in the lower case. A lower portion of the coil spring is projected from an underside of the lower case. A pair of leads electrically connect both ends of the coil to the coil springs, respectively.

REFERENCES:
patent: 4944017 (1990-07-01), Cognasse et al.
patent: 5287084 (1994-02-01), Sone

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