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DESCRIPTION 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 to
the upper surface through 7 holes 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
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electrode formed on a part of the 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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