Micro-speaker and method for assembling a micro-speaker
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United States of America Patent
Stats
-
Jul 24, 2007
Grant Date -
Nov 25, 2004
app pub date -
Jun 22, 2004
filing date -
Apr 11, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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