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JPS5529472

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DESCRIPTION JPS5529472
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
piezoelectric buzzer sounding body, FIG. 2 is a sound pressure characteristic diagram of the same
sounding body, and FIG. 3 is an embodiment of the piezoelectric buzzer sounding body of the
present invention. FIG. 4 is a sound pressure characteristic view of the same sounding body. 1 · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric
buzzer sounding body using a piezoelectric ceramic element, and it is an object of the present
invention to increase the sound pressure obtained by simple failure and to obtain appropriate
directivity. A piezoelectric buzzer sounding body generally used is simply a piezoelectric buzzer
element in which a thin piezoelectric ceramic element 2 is attached to a metal diaphragm 1 so as
to be smaller in FIG. L note @p Case 3 is attached to the inside and its sound pressure / j
characteristics are almost non-directional as shown in Fig. 2 and Sihi 2θ (lQ2-2 sound pressure
is also relatively small Met. The present invention is intended to eliminate the above-mentioned
conventional drawbacks, and it is preferable to provide a resonant case ('(a facing (outside of the
above-mentioned resonant case)') integral cylindrical tube or trumpet shaped horn In addition to
the directivity, the sound pressure itself is configured to be relatively large. That is, as shown in
FIG. 3, the piezoelectric buzzer sound producing body of the present invention has the metal
diaphragm 1 attached to the inside of the resonance case 3 so as to face the opening 4 of the
resonance case 3. A thin piezoelectric ceramic element is attached to + 1lll and a cylindrical or
trumpet shaped horn 5 is formed integrally with the outside of the resonance case 3 facing the
opening 4 of the resonance case 3 As is apparent from FIG. 4, it is possible to give appropriate
directivity as a sound pressure characteristic, and the sound pressure itself can be made
relatively large. Therefore, according to the present invention, it is possible to obtain a simple,
excellent and excellent buzzer buzzer sounding body, which is extremely useful in practice.
04-05-2019
1
04-05-2019
2
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