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1, -7 · Specification 1, title of the invention
Piezoelectric buzzer
3. Detailed Description of the Invention The present invention provides a piezoelectric buzzer
which has a very small number of parts, is extremely easy to assemble, and has a characteristic
delay. In the conventional piezoelectric buzzer, since the lead IN was used in order to connect the
piezoelectric buzzer element and the terminal, the disconnection of the lead wire, the 71nd lead
2, and the defect are problems. The -In the case of the type in which the element is housed in the
insulating case, the case and the force fitted to the case ((-since the element was absorbed
between the There is a drawback that it is difficult to obtain, and there is a further disadvantage
that the terminal is also press-fitted into the cover and it takes 7 jft steps. SUMMARY OF THE
INVENTION The present invention is intended to provide a piezoelectric bushing in which the
above-mentioned drawbacks are greatly improved. One embodiment of the present invention will
be described with reference to the attached drawings. In the figure, 1 is a pressure-based buzzer
element consisting of a piezoelectric element and a metal diaphragm, 2 is an e-edge case
consisting of a semicircular case structure 21) and 2b 'which are in contact with a hinge 2a, This
case 2 is an element fixing mFs 2c, 2c 'provided on the inner cylindrical surface of the case
constructions 2b, 2b' and a case construction 2b. The terminal fixing grooves 2d and 2d
'provided in such a manner that they do not overlap with the opposite surfaces of the respective
bottoms that contact each other when the 2b' is closed. When contacting each other EndPage: 1Openings 2e provided on opposite sides of the bottom of the vane. It has 2e '. A contact mother 3
has a stopper 3a and is put in the groove 2d in a state where the case constructions 2b and 2d
are opened so as to contact the pressure side 'element side of the buzzer element 1'. The case
structure 2b is arranged to contact the metal diaphragm side of the element 1 when the case
structures 2b and 2b 'are closed. In the state where 2b 'is opened, it is a ceramic contact terminal
inserted in the groove 2d' opposite to the contact terminal 3. Then, in the assembly, first, the
piezoelectric buzzer element 1 is press-fit into the case groove ff 'and the groove portion 2C for
fixing the element 1i 2b, and the contact terminals 3 and 4 are reversely directed to the grooves
iJ 2d and 2d' for fixing the terminal respectively. Then, the case groove 2b'i closes in the
direction of the arrow. Then, the case constructions 2b and 2b 'are integrally fixed by heat,
ultrasonic waves or the like. As a result, the piezoelectric buzzer element 1 is placed in contact
with the grooves 2c and 2c 'of the case constructions 2b and 2b', and the terminals 3 and 4 are
fixed in contact with the elements of the element 1 and the diaphragm.
Note that the casing 4.7 and the casings 2b and 2b 'can be configured separately. As described
above, the piezoelectric buzzer of the present invention is configured, has a very small number of
parts, is very easy to assemble, and is extremely stable in characteristics because it has a contact
structure without using a lead wire. In addition, the terminal has a number of advantages such as
having a sufficient pull-out strength to the extent that the terminal can be assembled without
4. Brief Description of the Drawings FIG. 1 is a perspective view before assembly 175 showing an
embodiment of a piezoelectric buzzer according to the non-invention, and FIG. 2 is a perspective
view of a contact terminal constituting the piezoelectric buzzer. 10 · · · · Piezoelectric buzzer
element, 2- · · · · · · · · insulating case, 2a · · · · · · hinges, 2b, 2b '· · · · · hinge structure, 2c, 2c' · · · ·
Grooves for fixing elements, 2d, 2d '· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · 4. 4. Name of agent Attorney Nakajima Toshio and 1 other EndPage: 2
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