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JPS5772497

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DESCRIPTION JPS5772497
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of
the present invention, and FIG. 2 is a block diagram showing another embodiment of the present
invention. 1.4 · · · · · · · diaphragm, 2, 3 · · · · · · · Piezoelectric element, 5 ° 6, 7.8 · · · · · · lead wire,
9 · · · · · · · · Support member.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a piezoelectric buzzer which converts an electrical signal into mechanical vibration. The
conventional pressure-monitoring buzzer consists of two elements, ie, a piezoelectric element and
a vibrator, to form 1111 &, so when a large sound is relatively necessary, it is relatively
insufficient for-, for example, an electronic watch or electronic When incorporated in a relatively
small amount of four-child equipment such as a table-top computer, the sound pressure was not
sufficient. In addition, particularly when trying to obtain changes in sound quality, etc., it was
limited. The present invention has been made in view of the above-mentioned point, and the
pressure element 1-full // P 7 =; 1 pair of piezoelectric bushings 1 main body 5 1 '; i: "consisting
of an electric element and a diaphragm Or, a pair of piezoelectric elements and & plate is q * p'p.
It provides a piezoelectric buzzer that changes the sound quality together with the improvement
of the sound pressure by dispensing in a + -direction. Hereinafter, an embodiment of the present
invention will be described with reference to FIG. Reference numeral 1 denotes a diaphragm, and
a piezoelectric element 2 is attached to the lower side of the first moving plate 1 by an adhesive
or other means to constitute a piezoelectric bushing main body. 3 twists the other piezoelectric
bushing 1 main body 4 The piezoelectric element 3 and the piezoelectric element 2 are disposed
so as to be opposed to each other. That is, the diaphragms 1 and 4 are coupled by the support
member 9 and the diaphragm 1 is supported. In this case, the diaphragm 1 may be shared with,
for example, the case of the electronic watch or the electronic scale unit or other parts. FIG. 2
shows another embodiment of the present invention. The same parts as in FIG. In this
embodiment, the diaphragm 1 of one piezoelectric bushing main body is opposed to the
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piezoelectric element 3 side of the other piezoelectric bushing main body. 2-,-) S-no In such a
case, lead wires 5 and 7 of lead wires 5 and 7 drawn from the piezoelectric element 2.3 and the
diaphragm 1.4 are applied to the lead wires 5 and 7, respectively. When different voltages are
applied to the voltages applied to the drive terminals 6 and 8, respectively, not only the sound
whose sound quality has changed but also sufficient sound pressure can be obtained. As
described above, according to the present invention, since the pair of piezoelectric buzzers is
configured such that the piezoelectric elements face each other or the piezoelectric elements and
the diaphragm, a sufficient sound pressure can be obtained and the change in sound quality The
practical effects are great, as can be expected.
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