Piezoelectric electro-acoustic transducer and manufacturing...

Details Piezoelectric electro-acoustic transducer and manufacturing... Piezoelectric electro-acoustic transducer and manufacturing...

2005-11-01

2005-11-01

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S348000, C310S345000

Reexamination Certificate

active

06960868

ABSTRACT:
A piezoelectric electro-acoustic transducer includes a substantially rectangular piezoelectric diaphragm, a casing having a support unit for supporting four corners of the piezoelectric diaphragm, terminals fixed to the casing such that an internal connection portion of the terminal is exposed in the vicinity of the support unit, a first elastic adhesive for coating between the external periphery of the piezoelectric diaphragm and the internal connection portion of the terminal therewith, a conductive adhesive for coating between electrodes of the piezoelectric diaphragm and the internal connection portion of the terminal via the upper surface of the first elastic adhesive therewith, and a second elastic adhesive for sealing the external periphery of the piezoelectric diaphragm and the internal periphery of the casing, and a cradle provided in the internal periphery of the casing as well as below the piezoelectric diaphragm in the vicinity that is coated with the first elastic adhesive for forming a gap for stopping flow of the first elastic adhesive at a position lower than the support unit as well as between the upper surface of the cradle and the bottom surface of the piezoelectric diaphragm.

REFERENCES:
patent: 6472798 (2002-10-01), Kishimoto
patent: 6570299 (2003-05-01), Takeshima et al.
patent: 6653762 (2003-11-01), Takeshima
patent: 6794799 (2004-09-01), Takeshima et al.
patent: 2000-310990 (2000-11-01), None
patent: 2003-009286 (2003-01-01), None
patent: 2003023696 (2003-01-01), None

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