JPH02215298

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DESCRIPTION JPH02215298
[0001]
TECHNICAL FIELD The present invention relates to a piezoelectric sounding body that generates
an audible sound and is used as a sound source of alarm sound and confirmation sound of home
appliances and the like. 2. Prior Art As shown in FIG. 2, according to the prior art, the
piezoelectric diaphragm 3 having the piezoelectric vibrating substrate 1 bonded to the metal
substrate 2 is housed in the resin case 4 and the tip is bent at one point (bent portion 6b) The
metal terminal 6 is fixed to the resin case 4, and the tip 6 a of the metal terminal 6 is soldered to
the piezoelectric diaphragm 3. SUMMARY OF THE INVENTION When the external stress is
applied to the resin case 4, the above-mentioned piezoelectric speaker is concentrated on the tip
portion 5 & of the metal terminal 6 so that the piezoelectric diaphragm 3 and the metal terminal
6 are applied. There is a problem that the tip portion 5a and the portion where the solder 6 is
attached are broken. The present invention solves such a problem, and an object of the present
invention is to prevent the breakage due to the external stress. Means for Solving the Problems
In the present invention, in order to achieve the above object, the present invention forms a bent
portion at at least two places at the tip portion of the metal terminal, and the tip side of the bent
portion is a piezoelectric diaphragm. It is soldered. Operation With this configuration, even if
external stress is applied to the resin case, concentrated stress is not applied to the soldered
portion of the metal terminal tip due to the bent portions at two or more places, so that breakage
from the soldered portion is eliminated. Embodiment 1 FIG. 1 shows an embodiment of the
present invention. In FIG. 1, the same parts as in FIG. 2 are assigned the same reference
numerals. In FIG. 1, reference numeral 1 denotes a piezoelectric vibration substrate, which is
adhered to a metal substrate 2 with an adhesive, and a piezoelectric vibration diaphragm 3 is
constituted by this. The piezoelectric diaphragm 3 is accommodated and fixed in the resin case 4
by an elastic adhesive or the like, the metal terminal 7 is inserted into and fixed to the hole of the
resin case 74, and the tip 7a is soldered to the piezoelectric diaphragm 3. As shown in FIGS. 1B
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and 1C, the metal terminal 7 has bent portions 7b and 7c at the rear of the tip 7a. Although the
two bent portions 7b and 70 are provided in this embodiment, the number may be further
increased. As described above, according to the present invention, two or more bent portions are
provided behind the tip of the metal terminal. Therefore, even when external stress is applied to
the resin case, the tip of the metal terminal and the piezoelectric vibration are provided.
Soldering of the board does not concentrate stress on the part, which makes it possible to
prevent breakage of the part.
[0002]
Brief description of the drawings
[0003]
1 is a perspective view showing a piezoelectric sounding body according to an embodiment of
the present invention, FIG. 1B is a perspective view showing a metal terminal according to an
embodiment of the present invention, and FIG. 1G is an embodiment of the present invention 2 is
a perspective view showing a conventional piezoelectric sounding body, FIG. 2B is a perspective
view showing a conventional metal terminal, and FIG. 2G is a piezoelectric sounding body
according to the prior art FIG.
1 · · · Piezoelectric vibration substrate, 2 · · · · · · · · Metal substrate, · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· resin case, 6 · · · · solder 7 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · bent portion. Name of agent Attorney Attorney Shigetaka Takano Other 1 multi-port
N ward
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