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JPS577298

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DESCRIPTION JPS577298
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a piezoelectric buzzer
sounding body according to the prior art, FIG. 2 is a cross-sectional view showing an embodiment
of the piezoelectric buzzer sounding body according to the present invention, and FIG. It is a
figure which shows the sound pressure-frequency characteristic of the piezoelectric buzzer
sounding body by this and this invention. 1 иии Metal plate, 2 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и around the diaphragm Part, 6 ..... Coupling axis.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a piezoelectric buzzer sounding body. Although the conventional piezoelectric buzzer sounding
body uses bending vibration as it is, the present invention transmits it to the bending vibration
full vibration plate of the piezoelectric buzzer and uses it as plane vibration, and improves the
total 1f- и 1,-same wave number characteristic It is intended to 1) As shown in FIG. 1, the
conventional pressure 'city buzzer sounding body is a' 'metal plate 1 and a piezoelectric buzzer
gold consisting of an electromagnetic element 2, 7x)' j '2 The structure is fixed to the case 3. The
vibration mode at this time is as shown by a dotted line, and the maximum amplitude is at the
center of the piezoelectric buzzer. The piezoelectric buzzer sound producing body according to
the present invention is, as shown in one embodiment of FIG. Part is fixed to case 3 while elastic
force is provided to the middle hole part and the peripheral part 5 which are installed at the
upper part of the case factor + t% T positive 3 and maximum amplitude, and keep the airtightness
[diaphragm 4 By bonding the central part of the piezoelectric buzzer to the central part of the
lower buzzer by means of the connecting shaft 6, the vibration mode of the piezoelectric buzzer
shown by the dotted line is converted to the vibration mode of the diaphragm 4 shown by the
alternate long and short dash line. It is an improvement of the sound of the buzzer sounding
body I toe @ him. FIG. 3 shows the & king-interference wave number characteristics of the
piezoelectric buzzer sounding body according to the prior art and the present invention
according to the prior art, where A is the prior art. ? ? ? B is the product of the present
04-05-2019
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invention, and the characteristics of the product of the present invention are more improved than
those of the conventional product. As described above, the present invention can provide a V
'electric buzzer sounding body having an improved sound pressure and three solid wave number
characteristics with a simple structure, and the practicability is great.
04-05-2019
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