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JPS61121600

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DESCRIPTION JPS61121600
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
piezoelectric sounding body used for an alarm, an alarm or the like of a watch. Configuration of
the Conventional Example and its Problems In recent years, the piezoelectric sounding body that
improves the acoustic characteristics by storing the piezoelectric buzzer in which the
piezoelectric element and the metal plate are bonded to each other in a case to output a large
volume is an alarm or It has come to be used for various alarms. Among them, the type in which
the terminal is directly attached to the printed circuit board has prevailed. However, the
conventional piezoelectric sounding body is attached to the printed circuit board and soldered
for 7 dips through the hole of the terminal guide leg In many cases, it causes contact failure of
the contact portion and corrosion of the metal plate and the piezoelectric element electrode
portion. SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, it is an
object of the present invention to provide a reliable piezoelectric sounding body which prevents
the entry of 7 ranox. In order to achieve this object, in the piezoelectric sounding body according
to the present invention, at least one of the terminal guiding legs of the lid is provided with a
step, and the other legs are slightly shortened. The sounding body is supported at at least three
points of the stepped leg portion to prevent the end face of the foot portion from adhering to the
printed circuit board, and the flux is released from the gap to prevent the flanks from rising.
Description of the Embodiments Hereinafter, one embodiment of the present invention will be
described with reference to FIGS. 1 and 2. FIG. In the figure, reference numeral 1 denotes a case,
which has a support 1a for supporting the piezoelectric buzzer element 2, a sound emission hole
1b, and a groove 1C. A lid 3 has a support 3a for supporting the piezoelectric buzzer element 2, a
claw 3b engaged with the groove 1C of the case 1, and a leg 3c having a step 3d at the tip. 4 is a
terminal having a contact 3d at the tip, and the three terminals 4 are respectively piezoelectric
Main electrode on element 2a. It is in contact with the auxiliary electrode formed on a part of the
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main electrode and the metal plate 2b. According to this embodiment configured as described
above, when the terminal 4 is inserted into the printed circuit board, the sound producing body is
supported and stabilized at the three points of the leg portion 3C and the support 3f. At that
time, since the part of the leg 3 C and the leg 3 e are short, the slacks escape to the outside and
do not rise along the terminal 4. Therefore, high reliability can be obtained without causing
contact failure of the contact portion and corrosion of the piezoelectric element and the metal
plate. Effect of the Invention As described above, in the piezoelectric sounding body according to
the present invention, at least one of the terminal guiding legs of the lid is provided with a step,
and the other legs are shorted by N, and the support and the stepped legs Since the sounding
body is supported by at least three points of the part and the end face of the leg is not in close
contact with the printed circuit board, the flux penetrates into the inside through the hole of the
leg when soldering the terminal to the printed circuit board It is possible to prevent the
occurrence of defects and corrosion of the piezoelectric buzzer element, and it can be made
reliable.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view showing an embodiment of a piezoelectric speaker according to
the present invention, and FIG. 2 is a bottom view of FIG.
DESCRIPTION OF SYMBOLS 1 ииииииииииииииииииии Piezoelectric buzzer element, 3 иииииииии Lid body, 3C
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Leg Step part of part, 3e иии и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и terminals.
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