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JPS6350197

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DESCRIPTION JPS6350197
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
piezoelectric sounding device that generates sound by excitation of a piezoelectric body. 2.
Related Art In recent years, piezoelectric sounding devices have come to be widely used for
confirmation of operations and warnings of operations in parts to which electronic technology is
applied. The following describes a conventional piezoelectric sounding device. FIGS. 3 and 4 are
block diagrams of a conventional piezoelectric sounding device. The piezoelectric sounding plate
11 is attached to the printed wiring board 14 by soldering the end of the lead wire 19 as shown
in the third illustration, or as shown in FIG. It is attached by inserting and soldering the power
supply electrode 13 which comes out of the box 12, and the excitation sound is generated by
supplying the AC voltage signal to the piezoelectric sounding plate 11. Problems to be solved by
the invention However, in the conventional configuration of FIG. 3, there is a problem of
increasing the number of parts 9 assembling time by soldering the lead wire 19 to the
piezoelectric sounding plate 11. In addition, when automatically soldering the printed wiring
board 14 into which the terminals 13 of the piezoelectric sounding device are inserted as shown
in FIG. 4, a heat resistant material must be used to prevent deterioration of the material quality
due to heat application. , There is a problem that parts cost will be high. In order to solve the
above problems, the present invention provides a piezoelectric sounding device that eliminates
lead wires and reduces the number of parts per assembly and enables automatic soldering
without using a heat-resistant material. To aim. Means for Solving the Problems In order to
achieve the above object, according to the piezoelectric sounding device of the present invention,
a piezoelectric sounding plate provided with a pair of electrodes on both sides or one side in the
thickness vibration direction and a peripheral portion of this piezoelectric sounding plate And a
resonance box having a claw at its lower end engaged with a hole of the printed wiring board,
and a pair of elastic power sources which are wired to project upward from the printed wiring
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board And an electrode, wherein the electrode of the piezoelectric sound generation plate and
the power supply electrode are in pressure contact with each other to be electrically connected.
According to this configuration, after the piezoelectric sounding plate is held by the projections
of the resonance box, the claws of the resonance box are engaged with the holes provided in the
printed wiring board to fix the resonance box, and therefore, it protrudes from the printed wiring
board. By pressing the piezoelectric sound-producing plate against the power supply electrode
having elasticity and being wired, the piezoelectric sound-production plate and the power supply
electrode can be electrically connected. Embodiment An embodiment of the present invention
will be described with reference to FIGS. 1 and 2. FIG. As shown in the figure, the piezoelectric
sounding plate 1 has a bimorph structure in which the piezoelectric body 1a and the vibrating
body 1b are bonded, and the piezoelectric sounding plate 1 has projections 8 provided on the
inner periphery of the resonance box 2 at its peripheral portion. It is locked and held between 8a.
Further, the resonance box 2 has a plurality of claws 6 engaged with the printed wiring board 40
holes 7 at the lower end. On the other hand, a power supply electrode 3 having elasticity in the
vertical direction is protruded from the surface and soldered to the printed wiring board 4. The
operation of the piezoelectric sounding device of this embodiment configured as described above
will be described below. First, after mechanically inserting the power supply electrode 3 having
elasticity in the vertical direction into the printed wiring board 4, automatic soldering is fixed by
passing through the apparatus. Next, after the piezoelectric sounding plate 1 is inserted and held
between the projections 8.8a of the resonance box 2, the claws 6 provided on the resonance box
2 are engaged with the holes 7 provided on the printed wiring board 4 The piezoelectric body 1a
of the piezoelectric sounding plate 1 and the diaphragm 1b are in pressure contact with the
power supply electrode 3, and the upper peripheral portion of the piezoelectric sounding plate 1
is in pressure contact with the projection 8. As well as being fixed, it is also connected
electrically. As described above, according to the present embodiment, the resonance box 2 for
automatically soldering the elastic power supply electrode 3 to the printed wiring board 4 and
holding the piezoelectric sound generation plate 1 inside is clawed in the hole 7 of the printed
wiring board 4 By fixing at 6, it is not necessary to solder the end portions of the lead wires to
the piezoelectric power generation plate 1 and the printed wiring board 4, and it is possible to
reduce the number of parts and the number of assembling steps. Automatic soldering becomes
possible. In the present embodiment, although the piezoelectric sounding plate 1 has a bimorph
structure, the piezoelectric sounding plate 1 may have a unimorph structure. As is apparent from
the above description, according to the present invention, according to the present invention,
there is provided a resonance box in which a piezoelectric sounding plate is held internally after
automatic insertion and soldering of a pair of elastic power electrodes to a printed wiring board.
By engaging the claws provided in this resonance box and fixing them to the printed wiring
board, the power supply pole and the piezoelectric sounding board are electrically connected,
eliminating the need for lead wires and reducing the number of parts and the number of
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assembly steps. It is possible to realize an excellent piezoelectric sounding device capable of
obtaining an effect that automatic soldering can be performed without using a heat resistant
material.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view showing a piezoelectric sounding device according to an
embodiment of the present invention, FIG. 2 is a perspective view showing the assembled state,
and FIGS. 3 and 4 are configuration diagrams of conventional piezoelectric buzzers.
DESCRIPTION OF SYMBOLS 1 иииии Piezoelectric sound generation board, 2
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии ? 7 ииииииииииииииииииииииииииииииииииииииииииии Protrusions. Name of Agent
Attorney Nakao Toshio and 1 other person Figure 2 Figure 3 Figure 13; Cattle
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