PIEZOELECTRIC TYPE ELECTROACOUSTIC TRANSDUCER

摘要

PROBLEM TO BE SOLVED: To provide a piezoelectric type electroacoustic transducer in which adverse effect on vibrating plates is made less and the changes in the characteristics are reduced even though thermal deformation occurs and an external force is applied to the casings. SOLUTION: The transducer is provided with piezoelectric vibrating plates 1 which have a quadrilateral shape bend and vibrate in a thickness direction by applying alternating signals between electrodes, casings 10 and 20 which store the plates 1 and a pair of terminals 11 and 12 which are inserted and formed into the casings. One tip parts of the terminals 11 and 12 being introduced into the internal sections of the casings are respectively provided with trunk sections 11c and 12c which are fixed to the inside surface center sections of the casings and both wing sections 11d and 12d which are extended toward corner sections from the trunk sections. The sections 11d and 12d are not fixed with respect to the casings and provided with stress releasing sections 11f and 12f that are formed between the sections 11c and 12c and the sections 11d and 12d so that the sections 11d and 12d are freely displaced in the internal side direction of the casings. The electrodes of the plates 1 are connected to at least one of the sections 11d and 12d by electrically conductive adhesive 14.