Panel-typed loud speaker and an exciter therefor
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United States of America Patent
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Jul 27, 2010
Grant Date -
Mar 8, 2007
app pub date -
Sep 1, 2006
filing date -
Sep 5, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An exciter for a panel-type loud speaker comprises a bimorph and a bimorph holding member. The bimorph comprises a plate member and a pair of piezoelectric ceramic layers, each formed on the opposite sides of the plate member. The bimorph holding member is holds one end of the bimorph and comprises a bimorph end holding portion for holding the one end of the bimorph, which comprises a three-layer embedded section embedding the pair of piezoelectric ceramic layers and the plate member sandwiched therebetween at the one end of the bimorph, and an extension embedded section in which an extension of the plate member is embedded, and a mounting protrusion protruding from the bimorph end holding portion, wherein a distal end of the mounting protrusion is connected to the diaphragm so that the bimorph is disposed on the diaphragm with a space interposed between the bimorph and the diaphragm.
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