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JPS5867399

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DESCRIPTION JPS5867399
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a longitudinal cross-sectional view of a conventional piezoelectric buzzer sound
producing device, FIG. 2 is a longitudinal cross-sectional view of a piezoelectric buzzer sound
producing device according to one embodiment of the present invention, and FIG. Frequency
characteristics, Fig. 4 is a sound pressure level-frequency characteristics of the piezoelectric
buzzer sound producing device of the above embodiment, Fig. 5 is an external view of a portable
electronic watch to which this invention is applied, viewed from the front side, Fig. 6 Is an
appearance surface of the portable electronic watch as viewed from the back side. 11 ...
diaphragm, 12 ... piezoelectric element, 13 ... piezoelectric buzzer, 14 ... resonance box, 15 ... first
resonator, 16 ... second resonator, 17. 19 ... resonant space, 18 ° 20 ... sound output holes, 36 ...
stand, 37 ... recess, 38 ... stand member, 39 ... engaging boss, 40 ... Support pin.
04-05-2019
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