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JPS54129978

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DESCRIPTION JPS54129978
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention,
FIG. 1 is a sectional view, and FIG. 2 is a perspective view showing an expanded state of a horn, a
conductive spring member and a diaphragm. It is. 1 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
2 и и и и и и и и и и и и и и и 2 О и и и и и и и 2 О и и и и и и и и и и и и и и и и и и Diaphragm, 4 ииииии Piezoelectric ?
element, 5 иииииии Conductive spring member, '5a иии и и и Spring terminal, 5b ииииииииииииииииииииииииииииии Holding
portion. ?
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric
buzzer. Conventionally, one surface of the piezoelectric element of the piezoelectric buzzer is
fixed to the moving plate, and one end of the lead wire connected to the power source is soldered
to the other surface of the piezoelectric element. It is connected by attaching. However, according
to soldering, there is a risk of damaging the piezoelectric element itself, and the amount of
soldered solder is also likely to be unstable, and the characteristic frequency may be fluctuated
along with this, and lead 1IAt-cutting or lead wire It also damages the insulating cover a of the
sensor and causes a short circuit. If the lead wire is held by pulling the lead wire with a strong
force when holding the other one of the lead wires at the time of assembly, this tensile force may
be applied to the diaphragm to reduce the volume. For this purpose, the soldering and assembly
in the piezoelectric buzzer have been carefully and carefully applied to give 41t-impact to the
workability, and a high level of skill has been required. The present invention eliminates the
above-mentioned drawbacks, and will be described with reference to the entire drawings of one
embodiment in the following. In FIGS. 1 and 2, 1 is a cap-like horn and an acoustic relief is
provided at the upper center of the horn. The hole 1a is drilled. The open end inner peripheral
surface lh2 of the horn 1 is engraved with the female screw 1b and the step $ 1c, while the
screw 2ai is engraved on the outer periphery of the upper end portion of the cap-like support 2 It
is screwed on the horn. Thus, the horn 1 and the support 2 can be coupled by a simple operation
and at an appropriate position. Of course, the present invention is not necessarily limited to this
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example. For example, press-fitting means may be used. Next, in the horn 1, an outer peripheral
portion of the 0 diaphragm 3 in which a circular diaphragm 5 composed of a conductive spring
member such as phosphor bronze is disposed is a horn step 1C and an upper end surface of the
support 2. In the 0 diaphragm 3 clamped and fixed in the above, a pullout projection 3a is
integrally formed. This projecting piece is bored in the horn 1 and protrudes outward from a
certain hole 1d, and the piezoelectric element 4 is fixed by a conductive adhesive on the upper
surface of the 0 vibration & 5 constituting the input terminal. The spring forceps 5a of the
conductive spring member 5 are electrically connected to 4! The spring member 5 has a ringshaped holding ssbi--and, as shown in FIG. A piece of spring terminal 5aj is a 3-portion extending
obliquely downward. The tip of the spring terminal 5a is in elastic contact with the upper surface
of the piezoelectric element 4 with a constant spring force. The holding portion 5b is stably held
in resilient contact with the ceiling surface 1e of the horn 1 by the reaction force of the spring
force of the spring terminal 5a. The spring member 5 is drawn out so as to face the base of the
spring terminal 5a. 5C is integrally molded, and this projecting piece protrudes outward from the
hole 1f of the horn 1 to constitute an input terminal.
The shape of the spring member 5 is not limited to the upper side, for example, it may be spiralshaped 0 and the spring member 5 is located in the horn 1 but may be held in the support 2. In
addition, the horn may be coupled to the support in the coupling relationship with the horn 17.
As described above, according to the present invention, since the spring-loaded spring member is
provided instead of the lead wire, the work of the lead wire soldering company is not required,
the work of assembling the piezoelectric buzzer 1i-efficient You can do it! Practical effects are
large, such as 1% and not requiring high-level skills. ??
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