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JPS5660995

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DESCRIPTION JPS5660995
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment
of a piezoelectric buzzer according to the present invention, and FIG. 2 is a perspective view
thereof. 1 ...... piezoelectric element, 1a ...... hole, 2 ...... metal case, 2a ...... hole, 3 ...... insulating
plate, 4 ······ Contact terminal.
DETAILED DESCRIPTION OF THE INVENTION The present invention provides a piezoelectric
buzzer which has a small number of parts and which is extremely easy to assemble. In the case of
a piezoelectric buzzer in which a conventional piezoelectric buzzer element is housed and used in
a case, an opening is required on one side of the case to increase the sound pressure level.
Therefore, a piezoelectric buzzer in which a piezoelectric element and a metal diaphragm are
bonded The elements were incorporated into one other than the case. For this reason, the
number of parts increases, and a function to fix the element and the case is required, and
assembly is also difficult. ノ? 2あった。 Furthermore, since a lead wire is used to connect the
element and the terminal, and the lead wire is further attached and fixed, there are many
problems such as disconnection of the lead wire and defects in soldering. The present invention
proposes a piezoelectric buzzer which makes the above-mentioned element and the case
integrally and / or eliminates the need for the lead storage by using the "-" 'F + 7 and further the
contact structure,:] J □, and solves the above mentioned order points. Hereinafter, an
embodiment of the present invention will be described with reference to the attached drawings.
In the drawing, 1 is a piezoelectric element having a hole 1a in a medium heat, 2 has a hole 2a
having substantially the same shape as the hole 1a at the bottom, and a cut and raised portion
for locking the insulating plate 3 in the opening A metal case integrally formed by drawing
processing including 2b and a terminal portion 2C, and the piezoelectric element 1 is bonded
with a resin so that the holes 1a and 2a overlap the inner surface of the bottom of the case 2,
The insulating plate 35 is fixed to the opening of the case 2 by caulking. Reference numeral 4
denotes a contact terminal attached to the insulating plate 3 together with the external terminal
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6 by means of the eyelet 6, and the contact terminal 4 is in contact with the piezoelectric element
31. Thus, according to the piezoelectric buzzer of the present invention, the piezoelectric buzzer
element and the case are integrally formed, and there is also a hole for raising the sound
pressure level, and the number of parts required for assembling 9 is reduced by the contact
structure. It is excellent in terms of price and characteristics.
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