Piezoelectric electroacoustic transducer

An electro-acoustic transducer and piezoelectric technology, applied in piezoelectric/electrostrictive transducers, piezoelectric/electrostrictive/magnetostrictive devices, sound-generating devices, etc., can solve the problems of low production efficiency and vibrating plate Changes in characteristics, low sound conversion efficiency, etc.
CN1240203CInactive Publication Date: 2006-02-01MURATA MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MURATA MFG CO LTD
Publication Date
2006-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

A piezoelectric electroacoustic transducer includes a piezoelectric diaphragm having a substantially rectangular shape which vibrates in the thickness direction when an alternating current is applied between electrodes of the piezoelectric diaphragm, a housing which stores the piezoelectric diaphragm, and a pair of terminals formed in the housing by insert molding. One end of each terminal is inserted inside the housing and includes a body portion fixed to the housing and wing portions which extend from both sides of the body portion toward the corners of the housing. The wing portions are not fixed to the housing, and stress-relieving portions are disposed between the body portion and the wing portions so that the wing portions are able to move toward the inside of the housing. Each electrode of the piezoelectric diaphragm is connected to at least one of the wing portions of the terminals by a conductive adhesive.
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Description

technical field

[0001] The present invention relates to piezoelectric electroacoustic transducers, such as piezoelectric receivers and piezoelectric buzzers. Background technique

[0002] In electronic equipment, home appliances, portable phones, etc., conventional piezoelectric electroacoustic transducers are widely used as piezoelectric buzzers to obtain alarm sounds or operation sounds, or as piezoelectric receivers. The structure of this kind of piezoelectric electroacoustic transducer is usually made by the following steps: a circular piezoelectric element is bonded to a circular metal plate to define a unimorph type vibrating piece, and the metal plate is mounted on a circular metal plate. In a circular container, the outer periphery of the metal plate is supported by silicone rubber, and the opening of the container is closed with a cap.

[0003] However, when a circular vibrating piece is used, there are problems in that the production efficiency is low, the sound c...

Claims

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