Piezoelectric electroacoustic transducer
AssigneeMurata Manufacturing Co., Ltd.
InventorKazuaki Yamamoto
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Abstract
In a piezoelectric acoustic transducer as formed by ultrasonically welding first and second resin casing components together while causing a piezoelectric vibration plate 5 to be laid between a first resin casing component 3 with sound release holes 3c and a second resin casing component 4, the piezoelectric vibration plate 5 is employed as a specific vibration plate of an approximately rectangular planar shape. As a result, Obtained is a small-size piezoelectric acoustic transducer capable of reducing damages of a piezoelectric vibration plate even where its resin casing is assembled by ultrasonic welding techniques.
Claims19
A piezoelectric electroacoustic transducer comprising:
- a piezoelectric vibration body having a substantially rectangular planar shape, the piezoetectric vibration body includes a substantially rectangular planar metal plate and a piezoelectric ceramic layer provided directly on the substantially rectangular planar metal plate such that the piezoelectric vibration body vibrates to produce acoustic waves;
- and
- a casing including at least two resin casing components joined to each other at a junction at which the at least two resin casing components are ultrasonically welded together, the piezoelectric vibration body being disposed in the casing.
Dependencies are inferred from the claim text.