Murata Manufacturing Co., Ltd.

Yoshitaka Nakamura

Tetsuo Takeshima

Kiyotaka Tajima

Yuko Yokoi

Tadashi Okuzawa

A piezoelectric electroacoustic transducer is miniaturized and has a reduced frequency, and even when a diaphragm has a warp or winding, the resonance frequency is be stabilized. The piezoelectric electroacoustic transducer includes a substantially rectangular piezoelectric diaphragm flexurally vibrating in a thickness direction in response to the application of an alternating signal between electrodes and a casing for accommodating the piezoelectric diaphragm, wherein the casing is provided with supporting members for supporting four corners of the piezoelectric diaphragm.

Piezoelectric electroacoustic transducer

A piezoelectric electroacoustic transducer includes two electrodes, a substantially square piezoelectric diaphragm producing a bending vibration in the thickness direction thereof in response to application of an alternating voltage between the two electrodes, a housing for housing the piezoelectric diaphragm, an elastic sealant for sealing the gap between the periphery of the diaphragm and the inner side surface of the housing, supports, disposed in the housing, for supporting at least two mutually opposing sides of the piezoelectric diaphragm or the four corners of the piezoelectric diaphragm, grooves which are disposed in the housing so as to face the periphery of the rear surface of the piezoelectric diaphragm and in which the elastic sealant is filled, and walls defining inner portions of the grooves, arranged such that the upper surfaces of the walls are located below those of the supports, for preventing the elastic sealant from flowing out to the bottom of the housing.

Growing community of inventors

Toyama, Japan

Yoshitaka Nakamura