Piezoelectric acoustic device
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United States of America Patent
Stats
-
Mar 20, 2001
Grant Date -
N/A
app pub date -
Mar 19, 1999
filing date -
Jun 22, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piezoelectric acoustic device capable of keeping a substantial diameter of a metal vibrating plate from being reduced and preventing clogging of a damping cloth member. The piezoelectric acoustic device includes a piezoelectric vibrator including a metal vibrating plate and a piezoelectric ceramic element joined to the metal vibrating plate. The piezoelectric vibrator is arranged in a casing which is formed on an inner peripheral surface thereof with an inclined joint surface section of an annular shape which surrounds an outer peripheral portion of the metal vibrating plate. The piezoelectric acoustic device also includes a pressure-sensitive adhesive layer formed by coating a pressure-sensitive adhesive on the inclined joint surface section. The outer peripheral portion of the metal vibrating plate is joined through the pressure-sensitive adhesive layer to the inclined joint surface section.
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