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DESCRIPTION JPS55139479

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DESCRIPTION JPS55139479
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of the buzzer sounding body
according to the present invention, FIG. 2 is a sectional view of the buzzer sounding body, FIG. 3
is an enlarged view of a projection, and FIG. It is principal part sectional drawing after
incorporating a sounding body in a module. DESCRIPTION OF SYMBOLS 1 ииии Diaphragm body, 2
ииииии Piezoelectric element, 3 ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Circuit board 5a и и и и и и и и и и и и и
и и и и и и и и и и element cover.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a buzzer structure
in an electronic watch having an alarm function. In the conventional sounding body for a buzzer
having a moving plate and a piezoelectric element, the position of adhesion between the
vibrating plate and the piezoelectric element can not be determined, so there are problems with
contact with other parts, conduction failure, etc. Also, there are problems such as breakage of the
piezoelectric element due to deformation of the diaphragm due to external pressure (1) fl ? 91
((). The object of the present invention is to provide a sweating body for a buzzer which solves
the above-mentioned drawbacks. Hereinafter, an embodiment of the present invention will be
described with reference to the drawings. 1 is a plan view of the perspiration body of the present
invention, FIG. 2 is a cross-sectional view of the perspiration body for a buzzer, FIG. 3 is an
enlarged view of a protrusion 1), and FIG. It is a principal part sectional view after incorporation.
As shown in FIG. 1, the vibrating plate 2 is a piezoelectric element, and a projection 3 is provided
on the moving plate so as to facilitate positioning at the time of bonding with the piezoelectric
element. The projection 3 is incorporated in the module as shown in FIG. 4, which is a sounding
body for buzzer 9 having the photographing plate and the piezoelectric element, which can be
easily formed by pressing or the like. Here, 4 is a coil spring for connecting the electrode 5 ? on
the circuit board 5 and the electrode of the piezoelectric element 2. Since the positioning plate of
the conventional moving plate is used, the piezoelectric element 2 may be displaced during
bonding, and the first coil spring 4 may short-circuit the moving plate 1. However, (2) it was
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possible to prevent a short circuit by providing the projection 3 on the diaphragm 1. In addition,
in order to protect the damage of the piezoelectric element 2 from the deformation of the
diaphragm 1 due to the external pressure, the projection 3 is configured to be in contact with the
element cover 6 which constitutes a part of the module. As described above, in the sound
generator for a buzzer in an electronic watch having an alarm function, positioning can be
facilitated and conduction defects can be prevented by providing a projection on a part of the
diaphragm. Damage to the piezoelectric element can be prevented from external force.
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