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DESCRIPTION JPS63102600

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DESCRIPTION JPS63102600
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
piezoelectric buzzer utilizing flexural vibration which functions as a sound source of an acoustic
device. 2. Related Art Conventionally, this type of piezoelectric buzzer has a configuration as
shown in FIG. 3 and FIG. In FIG. 3 and FIG. 4, 1 is a thin plate piezoelectric element having
electrodes on both sides, 2 is a metal diaphragm, and is joined by an adhesive 3 to apply an f
term to generate a flexural vibration. In this case, as shown in FIG. 4, the contact method by the
plate spring 4 was adopted for the metal diaphragm 2 which can not be soldered. Problems to be
Solved by the Invention In such a conventional configuration, rust or dirt is generated at the
contact portion in a long time operation in a high temperature / humid atmosphere or a
hydrogen sulfide atmosphere or the like, resulting in electrical disconnection and vibration of the
piezoelectric buzzer. There was a problem that it disappeared. An object of the present invention
is to solve such a problem and to provide a piezoelectric buzzer having high mass productivity
and high reliability. Means for Solving the Problems In order to solve the problems, the present
invention is a metal diaphragm which can not be soldered to a piezoelectric buzzer utilizing
flexural vibration, such as stainless steel, beryllium and titanium. A metal of any of gold, silver,
platinum, tin, lead and copper as a solder alloy layer is formed on a surface of a nickel alloy or
aluminum with a thickness of 10 on guest to 100 microns. Operation With this configuration,
when applying a signal that generates flexural vibration, it becomes possible to connect to the
metal diaphragm by soldering, and the reliability in long-term operation can be increased.
Embodiment 1 FIGS. 1 (a) and 1 (b) are a plan view and a sectional view showing a piezoelectric
buzzer according to an embodiment of the present invention, wherein 1 is a thin plate
piezoelectric element having electrodes on both sides and 2 is a solder easily. It is a metal
diaphragm in which the thin film layer 5 of the metal which makes an alloy is formed. FIG. 2
shows a soldering connection method for applying a signal to a piezoelectric buzzer according to
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the present invention. Here, 6 is a lead wire and 7 is a soldered portion. Effects of the Invention
As described above, according to the present invention, by forming a metal thin film layer which
easily forms an alloy layer with solder on the metal diaphragm 2 incapable of soldering the
piezoelectric buzzer, the piezoelectric buzzer can be reactivated in five steps. Soldering is
possible in the connection method for applying a signal to be used, and the effect of being able to
provide a highly reliable, highly mass-produced, piezoelectric buzzer can be obtained.
[0002]
Brief description of the drawings
[0003]
1 (a) and 1 (b) are plan views and sectional views showing a piezoelectric buzzer according to an
embodiment of the present invention, and FIG. 2 shows a connection state of application of a
drive signal to the piezoelectric buzzer according to the present invention. 3 (a) and 3 (b) are
plan views and sectional views showing a conventional piezoelectric buzzer, and FIG. 4 is a
perspective view showing a connection state of application of a driving signal to the conventional
piezoelectric buzzer. .
1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · thin plate piezoelectric element, 2 · · ·
metal diaphragm, 3 · · · adhesive, 5 · · · thin metal layer, 6 · · · lead wire, 7 · · · -Soldered part. Name
of Agent Attorney Nakao Toshio One other person 7-- Wet version Piezoelectric Shoya? ---------------------------------------------------------------------------- Figure 4
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