PIEZOELECTRIC BUZZER SOUNDING MEMBER

摘要

PURPOSE:To provide a piezoelectric type buzzer sounding member with which buzzer sounds of a high sound pressure are obtainable by suppressing a higher harmonic component exclusive of a resonance frequency. CONSTITUTION:A supporting body 5 of nearly the same width as the width of a metallic diaphragm 6 stuck with the piezoelectric element 1 and is shorter by a prescribed length than the length of a piezoelectric element 1 is formed on the rear surface of this metallic diaphragm 6 in nearly the central part of the metallic diaphragm 6 in a position corresponding to the piezoelectric element 1. As a result, the piezoelectric type buzzer sounding member has a basic mode of a 1/2 wavelength and vibrates at the resonance frequency of the high sound pressure as the unnecessary higher harmonic components are suppressed. Such piezoelectric type buzzer sounding member produces buzzer sounds with high sounds to the outside even if the sound producing member is disposed within the casing of an electronic apparatus such as electronic clinical thermometer with which liquid tightness is required.