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JPS5522784

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DESCRIPTION JPS5522784
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A, a top view and a cross-sectional view of a
conventional piezoelectric buzzer in a rice field, FIG. 2B: a top view and a cross-sectional view
showing an embodiment of the piezoelectric buzzer of the present invention, The figure is a
sound pressure characteristic comparison figure of this invention product and a conventional
product. 1 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 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
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DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric
buzzer capable of obtaining a sound pressure characteristic with a simple configuration 1 as well.
Conventionally, in the piezoelectric buzzer formed by bonding the piezoelectric ceramic plate
vibrator 1 and the metal plate 2 as shown in FIG. 1B, the sound pressure characteristic is low by
itself, and by putting it in an acoustic box (not shown) In FIG. 1, which has improved the sound
pressure characteristics, 3 is a lead wire taken out from the vibrator 1 and the metal plate 2. The
present invention has been made in view of the above-described points, and FIG. The same parts
as those described above are given the same reference numerals as the above.): H: z 7 k) L 2 As
shown in FIG. 2, the piezoelectric buzzer of the present invention integrally molds the metal plate
2 'in a horn shape. It is characterized by The sound pressure characteristics of the conventional
piezoelectric buzzer (without using an acoustic box) and the piezoelectric buzzer of the present
invention are shown in comparison in FIG. 3, where A is the sound pressure characteristics of the
present invention and B is the conventional product. Sound pressure characteristics are shown
respectively. As described above, the piezoelectric buzzer according to the present invention has
a simple structure in which a metal plate is integrally formed in a horn shape, and can have a
good sound pressure at a good as shown in the thirty-first without using an acoustic box.
04-05-2019
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