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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
piezoelectric sounding body used for an alarm of a watch, a calculator, a microwave oven, a toy
or the like, a switch confirmation and the like. Conventional Piezoelectric Sounding Body In the
conventional piezoelectric sounding body, piezoelectric elements are attached to a metal plate
and lead wires are soldered to each of them. Problems to be solved by the invention In such a
conventional configuration, it is difficult to directly attach to a printed circuit board or the like,
and it is necessary to connect the lead wire and the terminal of the device, and it takes time for
assembly. In addition, the wire was unreliable, such as breakage of the lead wire. Therefore, it is
an object of the present invention to provide a piezoelectric sounding body which can be directly
attached to a printed circuit board without the above-mentioned drawbacks and which is
excellent also in the process and reliability due to the unnecessary lead wire. is there. Means for
Solving the Problems In order to achieve this object, the piezoelectric sounding body of the
present invention has a plurality of terminal portions which are integral with the metal plate to
which the piezoelectric element is adhered and which project substantially radially from the
plane thereof. A terminal having a contact point is attached to at least one of the terminal
portions via an insulator, and the contact point and the upper 3A- / the piezoelectric element are
electrically connected. Operation With this, the terminal and the terminal portion can be directly
mounted on the printed circuit board, the number of assembling steps is small, and the reliability
is also high. Obviously, the mounting can also be reduced in space since it can be mounted
vertically on the printed circuit board. Embodiment 2 An embodiment of the present invention
will be described with reference to FIGS. 1 and 2. FIG. In the figure, reference numeral 1 denotes
a piezoelectric element, which is bonded onto a metal plate 2. Each of 2a and 2b is a terminal
portion which is integral with the metal plate 2 and protrudes substantially radially from the
plane of the metal plate 2, and one of the terminal portions 2a is longer than the other terminal
portion 2b and attached directly to the printed circuit board It is Here, a plurality of terminal
portions 2a may be provided in order to increase the strength when attached to a printed circuit
board. In addition, at the tip of the terminal portion 2a, a positioning step portion 2C which
serves to position when attached to a printed circuit board is provided. The reference numeral 3
denotes an insulator such as plastic, and is mounted so as not to be separated from the terminal
portion 2b by press fitting. Further, the terminal 4 is integrally formed on the insulator 3, and the
insulator 3 is previously provided with a hole for the terminal portion 2b. In the extension of the
terminal 4, there is provided a contact point 4a which is integrally contacted or soldered on the
piezoelectric element 1, and in the other extension, a positioning step similar to the positioning
step 2c. The part 4b is provided.
It goes without saying that electrodes are provided on both sides of the piezoelectric element 1,
and when a three-terminal type piezoelectric element having a structure in which the electrodes
on one side are divided, the terminal portion 2b is used. A separate terminal unit similar to the
above may be provided, and another set of the terminal 4 having the contact 4a and the insulator
3 may be prepared and configured as described above. According to the piezoelectric sounding
body of the present invention thus configured, direct attachment to a printed circuit board is
possible, no lead wire is required, and the number of assembling steps is reduced, and reliability
is improved. It can be done. In addition, since the printed circuit board can be mounted in the
vertical direction, the mounting can be made small in space, which is practically excellent.
Brief description of the drawings
FIG. 1 is a cross-sectional view showing an embodiment of a piezoelectric speaker according to
the present invention, and FIG. 2 is a perspective view thereof.
DESCRIPTION OF SYMBOLS 1 ииии Piezoelectric element, 2 иииииии Metal plate, 2a, 2b ииииииииии Terminal
part, 3 иииииииииииииииииииииииииииииииииииииииииииииии , 4a и и и и и и и и и и и contacts. Name of Agent Attorney Nakao Toshio
and 1 other person r-1 1 5 5
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