Electroacoustic transducer and method of fabricating the same

Details Electroacoustic transducer and method of fabricating the same Electroacoustic transducer and method of fabricating the same

1994-10-07

1996-12-03

Tran, Sinh

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381194, 381205, 3403111, H04R 2500, H04Q 130

Patent

active

055816231

ABSTRACT:
The present invention provides an electroacoustic transducer and a method of fabricating the same, employing a lead frame to integrally form a plurality of component parts, thus reducing the number of individual component parts, and improving assembly efficiency. The electroacoustic transducer comprises a base, a yoke fixed to the base, a core, a coil wound around the core, magnet surrounding the coil, a support ring surrounding the magnet, a vibrating plate supported on the support ring, lead terminals fixed to the base, and a case having a sound emitting cylinder and joined to the base so as to cover those components. A gap is formed between the core and the diaphragm. The diaphragm, the gap, the core, the yoke and the magnet form a closed magnetic path. The coil drives the diaphragm for vibration when energized. The yoke and the lead terminals are integrally formed of a common metal material such as the lead frame. The core may be integrally formed with the yoke of the lead frame.

REFERENCES:
patent: 5394479 (1995-02-01), Ishigaya et al.
patent: 5432758 (1995-07-01), Sone

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