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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment
of a piezoelectric buzzer according to the present invention, and FIG. 2 is an exploded
perspective view thereof. 1 · · · Piezoelectric buzzer element, 2 · · · · · · · · Metal case, 2 · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · insulating plate for the lid, 4,5 · · · · · · · · · · · · · · · · · · · · · · · · · · · · Conductive
DETAILED DESCRIPTION OF THE INVENTION The present invention provides a piezoelectric
buzzer which is extremely easy to assemble and which is excellent in characteristics. In the
conventional piezoelectric buzzer, particularly in the case where the piezoelectric buzzer element
is housed in the case, when the oscillation circuit is connected to the '-4 piezoelectric buzzer
element through the connection terminal, the lead wire and the soldering are used. 6.
According to this, when vibrated, there were problems such as disconnection of lead wires, / l-,
and solder removal. Also, the grounding terminal directly extended the metal diaphragm of the
element to serve as a terminal. However, according to this, when the terminal is attached to the
printed circuit board, there is a disadvantage that the oscillation state is adversely affected and
the oscillation becomes unstable in many cases because the attachment state is largely dispersed.
The present invention has been proposed to greatly improve the above-mentioned conventional
drawbacks. One embodiment of the present invention will be described with reference to the
attached drawings. In the drawing, 1 is a piezoelectric buzzer element comprising a piezoelectric
element and a metal diaphragm, 2 is a step 2a, a cut and raised portion 2b provided on the
opening side, and metal made of a through hole 2C provided on the bottom portion A case 3 and
an insulating plate 3 for the lid of the case 2 are terminals 4 electrically connected to the
piezoelectric element of the element 1 and a metal diaphragm via a conductive rubber described
later. 5 is installed. 6 electrically connects the piezoelectric element of the element 1 and the
terminal 1 to the terminal 4 2-conductive rubber, and R 2 electrically connects the metal
diaphragm of the element 1 to the 3-terminal 5 It is rubber. Then, the insulating plate 3 is fixed
by caulking the opening of the case 2 via the conductive rubber 6.7 so that the piezoelectric
buzzer element 1 is locked to the step 2a in the case 2, at this time. Rubber 6.7 is incorporated
slightly compressed. As described above, the piezoelectric buzzer of the present invention is
configured, and since it does not use a lead wire, it has the effect of being extremely easy to
assemble and of being extremely excellent in characteristics as well as in reliability. It is.
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