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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention,
FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a sectional view taken along the line
1-- in FIG. 3 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · short side of the piezoelectric element, 6 · · · · · · · ·
· · ·.
[Detailed Description of the Invention] This Koto is related to a clock, 1 alarm, 1 f 4 as a device, 1
inside pressure, 1 f The diaphragm is supported at the periphery in the evening, and the
piezoelectric element is bonded to the diaphragm by 1-4,-/ "2 t". 圧 電 ・ か る Piezoelectric
buzzer 'J? (1) The characteristics are greatly influenced by the degree of adhesion between the
piezoelectric element and the diaphragm and the quality of the support of the oscillating plate. In
the case of cracking i, the degree of adhesion between the piezoelectric element and the
diaphragm and the support V of the diaphragm (variation is hard to be avoided, and even a single
characteristic of the wedge causes a-· rattling. The present invention is an improvement to
eliminate the conventional drawbacks of soil distribution. The cases 1 and 2 both have a
bottomed cylindrical shape and are supported by t1 along the outer periphery or the entire
periphery of the circular diaphragm 3 by the both sides n1 fixed by press-fitting each other. The
piezoelectric element 4 is bonded to the lower surface of the diaphragm 6 with an epoxy
adhesive or the like. This piezoelectric element 4 is a strip-shaped rectangular VCC-shaped
sensor fk having a substantially hemispherical shape on the diaphragm 3 at a substantially
intermediate position between the short sides 5 of 5 and the support portion (case 2.50 inner
surface). The convex portions 6, 6 are formed by pressing. 17t case 1V (The sound output hole 7
is formed at the central portion of the seven cases n1 case 2VC is formed with a notch h8 or n in
the wall portion 11). 2-Although not shown in the drawings, the lead & connected to the friction
plate 3 and the piezoelectric element 4 is pulled out to the outside of the notch 8. By the way, the
pressure-the element 4 or the rectangle-the ring, the f along the longitudinal direction of 1-(@ :;
minutes (displacement or large (C 11 ° vibration characteristics of the vibration b 3 Of the
supporting furnace tube, but if the convex portion 6.6 is in the center of the rib 4 between the
short sides 5 and 5 of the piezoelectric element 4 and the supporting portion, this hL, It increases
Oka 1 of either locally, to come up (/ zeta cowpea 1-position of the convex h6,6 撫 apparent
leaves the support point ten (sushi point Rika. The outer peripheral part of the other part of the
vibration & 3 is a piezoelectric element 4 or a rectangle (it is a part which was easy to receive the
influence of the support in addition to the fact that it is small in the original displacement
displacement or small. The influence of the support vil-The movement of the support 4 by the
presence of the convex s6.6 is also moved by the presence of the convex s6.6, as in the case of
the moon-seven Kt device n is less characteristic because the influence of the support is reduced
The influence of the degree of adhesion between the piezoelectric element and the force plate is
also reduced, and greed J adjustment and the like become uneasy, so production is easy V (-if
not, quality control in mass production The effect of the meat is really great 6-.