| 摘要 |
A piezoelectric buzzer has a piezoelectric crystal mounted on a circular mounting plate. Supporting struts are integrally formed in the mounting plate by punching strut shaped portions in the plate and bending these portions such that they are substantially perpendicular to the plate. The struts are positioned on the nodal circle of the transducer so that the vibration of the transducer is not substantially impaired by the mounting arrangement. An oscillator circuit is connected to provide a potential between the mounting plate and a first electrode positioned on the surface of the crystal opposite the mounting plate. A second electrode, positioned on the surface of the piezoelectric crystal adjacent the first electrode, provides a feedback signal to the oscillator circuit. The unique buzzer design allows the buzzer components to be assembled by a one-step soldering process.
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