Micro-speaker and method for assembling a micro-speaker

Details Micro-speaker and method for assembling a micro-speaker Micro-speaker and method for assembling a micro-speaker

2007-07-24

2007-07-24

Ni, Suhan (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S412000

Reexamination Certificate

active

10874105

ABSTRACT:
The micro-speaker includes a driver unit having a housing, a magnet disposed within the housing forming a radial gap between the magnet and the circumferential walls of the housing, and a magnetic plate disposed on the magnet, a vibration system having a diaphragm and a voice coil where the vibration system is fixed to the drive unit and the voice coil protrudes into the radial gap, and a volatile magnetic fluid in the radial gap about the voice coil.

REFERENCES:
patent: 4017694 (1977-04-01), King
patent: 4303806 (1981-12-01), Thiele
patent: 4320263 (1982-03-01), Thiele
patent: 4414437 (1983-11-01), Trauernicht et al.
patent: 4742887 (1988-05-01), Yamagishi
patent: 5243662 (1993-09-01), Sogn et al.
patent: 5335287 (1994-08-01), Athanas
patent: 5757946 (1998-05-01), Van Schyndel

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