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JPS5736099

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DESCRIPTION JPS5736099
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a conventional piezoelectric
vibrator, and FIGS. 2 and 3 show an embodiment of the piezoelectric vibrator according to the
present invention, and FIG. FIG. 3 is a cross-sectional view of FIG. DESCRIPTION OF SYMBOLS 1
... Piezoelectric element, 2 ... Metal plate, 3 ... Diaphragm, 5 ... Conductive wire, 6 ... Soldering is a
part.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric
alarm device which causes a piezoelectric vibrator to be bent and vibrated by an electric circuit
to generate sound, and a target treatment thereof is to electrically connect the electric circuit and
the piezoelectric vibrator. Soldering of the conductive wire to the piezoelectric vibrator is easy.
(1)、S! As shown in FIG. 1, the 7 ° conventional piezoelectric vibrator has a piezoelectric
element l having silver on the front and back, and radial expansion and contraction due to the
electrostrictive effect of the piezoelectric element l to be bending vibration in the thickness
direction efficiently. It consists of a metal plate 2 and a large diaphragm 3 for sound pressure
amplification, and these are integrally bonded by an adhesive through the metal plate 2. In the
electroacoustic transducer having such a structure, the inserted metal plate 2 serves as a
mechanical impedance matching device, so the relatively small piezoelectric element l can drive
the large diaphragm 3 to emit a loud sound. be able to. By the way, the conductive wire 5 is
soldered to the metal plate 2 which is in electrical contact with the front electrode of the
piezoelectric element 1 and the back electrode so that the alternating voltage of the electric
circuit 4 can be applied to the piezoelectric vibrator. A piezoelectric vibrator configured using a
brass plate or a stainless steel plate as the metal plate 2 and a large brass plate as the diaphragm
3 has a very large heat capacity, and therefore, the soldering of the conductive wire 5 to the
metal plate 2 is difficult (2) It was difficult and not easy.
04-05-2019
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