Shaker-type transducer with centering device
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United States of America Patent
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Jul 29, 2014
Grant Date -
Jul 5, 2012
app pub date -
Sep 2, 2010
filing date -
Sep 9, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A shaker transducer is disclosed, which comprises a magnetic unit (1) composed of a magnet (3) disposed between a first polar plate (2) and a second polar plate (4) in such a way to generate a toroidal air gap (5). A sound coil (6) is disposed in the air gap (5) to move axially and a centering element (100) is fixed to the coil to maintain it centered with respect to the magnetic unit (1). A rigid element (10) comprising a shank (12) fixed to said cylindrical support (61) of the sound coil and adapted to be anchored to a surface to transfer the sound vibrations generated by the magnetic unit (1). The centering element (100) comprises a central cylindrical shank (101) fixed to the coil, a peripheral shank (102) fixed to the second polar plate (4) and a plurality of elastic spokes (103, 103′) disposed between said central shank (101) and said peripheral shank (102).
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