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JPS60121398

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DESCRIPTION JPS60121398
[0001]
Brief description of the drawings
[0002]
FIG. 1 is an external perspective view showing an example of a vibrating body conventionally
used for a piezoelectric speaker, and FIG. 2 is a schematic diagram showing the configuration of
the vibrating body and the relationship between each electrode and the signal type applied and
pressure. Figures 3A and 3B are schematic diagrams showing the operation when the polarities
of the signal voltages applied to the electrodes of the vibrating body are different from each
other, and Figure 4 shows the air volume excluding operation of the vibrating body. FIG. 4A is a
schematic view showing a case where signal voltages are not applied to each electrode, and FIGS.
4B and 4C are diagrams showing a case where signal voltages of different polarities are applied
to each electrode. FIG. 5 is an external perspective view showing a case where a mesh is
stretched from the frame over the entire surface in the width direction of the vibrator in one
embodiment of the piezoelectric speaker according to the present invention, and FIG. 6 is the
embodiment shown in FIG. The frequency and sound pressure levels in piezoelectric speakers. 7
to 9 show the case where the mesh is not stretched from the frame but only on the vibrating
body, and FIG. 7 shows the case where the entire surface in the width direction of the vibrating
body is stretched, FIG. 8 is an external perspective view showing the case where both ends in the
width direction of the vibrating body are stretched on both the front and back sides in the width
direction of the vibrating body. 1.2 · · · Piezoelectric film, 3a, 3b · · · bent portion, 4 a, 4 bt 5 at 5 b
· · · · · · · 10 · · · vibration body, 20 · · · frame, β 0 · · · mesh .
12-05-2019
1
12-05-2019
2
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