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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
piezoelectric buzzer element used for an alarm, such as a watch, a toy, a telephone, etc. The
structure of the prior art and its problems In recent years, the piezoelectric buzzer has come to
be used in a wide range of applications due to its thin shape, low current consumption, etc. In
addition, most of them solder the lead wires on the brass plate and the piezoelectric element,
respectively, and it is difficult to take out high sound pressure because of the heavy specific
gravity of the brass plate in this structure. In another structure, as shown in FIG. 1, the main
electrode 1? L and the sub electrode 1b are formed, and the sub electrode 1b and the main
electrode on the back surface are electrically connected in advance with a conductive paint 1C
such as silver paint, and high sound pressure can be obtained, but metal such as aluminum is
difficult to solder There was also one that was adhered to the plate 2 and the lead wire 3 was
soldered to the main electrode IL and the sub electrode 1b respectively, but in this configuration,
it is necessary to apply the conductive paint 1ci to the outer peripheral end face of the element in
the state of the piezoelectric element 1 Workability is poor due to limited space, and the risk of
element cracking is also a dog. In addition, at the edge portion of the piezoelectric element 1, the
coating thickness is reduced, and the possibility of non-conduction is high. SUMMARY OF THE
INVENTION In view of the above, it is an object of the present invention to provide a piezoelectric
buzzer elimentor for high sound pressure, which has good operability and high reliability.
Configuration of the Invention In order to achieve this object, the piezoelectric buzzer element of
the present invention is formed on the piezoelectric element in advance with all the main
electrodes and the sub electrodes, and after bonding to the piezoelectric element all conductive
material The conductive material is bonded with a conductive adhesive, which makes it easy to
assemble and prevent cracking of the piezoelectric element. DESCRIPTION OF THE PREFERRED
EMBODIMENT An embodiment of the present invention will be described with reference to FIG.
In the figure, 4 is a piezoelectric element, 4a and 4b are main and sub electrodes formed in
advance on the piezoelectric element 4, and 4C is a conductive adhesive applied between the sub
electrode 4b and the conductive material 5 . The sub electrode 4 b is provided at the outer edge
of the piezoelectric element 4. 5 is a difficult conductive material such as aluminum and carbon
fiber reinforced plastic. 6.7 are lead wires attached to the main electrode and the auxiliary
electrode, respectively. According to the piezoelectric buzzer element of the present invention
configured as described above, a material that is advantageous for extracting sound pressure but
is difficult to solder can be used as a conductive material, and a piezoelectric element can also be
used. Since the conductive adhesive is applied after the adhesive is applied to the conductive
material, the risk of cracking of the piezoelectric element is small, and the workability is also
Furthermore, it is possible to apply the conductive adhesive uniformly between the auxiliary
electrode and the conductive material, and the reliability is also excellent.
Brief description of the drawings
FIG. 1 is a perspective view of a piezoelectric buzzer element in the prior art, and FIG. 2 is a
perspective view showing an embodiment of the piezoelectric buzzer element according to the
present invention.
4 и и и Piezoelectric element, 41 и и и и и и и и и и и и и и и и и и main electrode, 4b и и и и и и и и и и conductive
adhesive, 5 и и и и conductive Material, 6.7 и и и и и и и и и lead wire.
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