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DESCRIPTION JPS54168835

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DESCRIPTION JPS54168835
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
piezoelectric speaker, FIG. 2 is a cross-sectional view showing an embodiment of the piezoelectric
speaker of the present invention, and FIG. 3 is an example of use of the piezoelectric speaker FIG.
4 is an enlarged sectional view of the relevant part. 7 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 и и и и и и и и и и и и и и и и и conductive adhesive, 10 и и и и и и и и и и и и и и и и и и и и и и diaphragm , 12 ииииии Spacer,
13 и и и и и и и и и и
[Detailed description of the invention] In the present invention, it is intended to provide a
piezoelectric speaker which does not require wiring when it is incorporated as a speaker device. -- "Height" of two cabinets seven. As a piezoelectric type speaker in the prior art, as shown in FIG.
1, a piezoelectric or piezoelectric element composed of a piezoelectric element having electrodes
formed on the upper and lower surfaces is disposed in a frame 1 as shown in FIG. The central
part of the diaphragm 3 is adhesively bonded, the edge of the peripheral edge of the diaphragm
3 is connected to the peripheral part of the frame 1 through the gasket 4, and the lead wires 5
are respectively connected from the electrodes on the upper and lower surfaces of the
piezoelectric vibrator 2. Are drawn out through the through holes 6 of the frame 1 to be
connectable to an input signal source. In such a configuration, in order to apply an input signal, it
is necessary to provide the lead wire 5 and there is a disadvantage that the wiring operation is
time-consuming. An embodiment of the present invention will be described with reference to
FIGS. 2 to 4, which will eliminate the above-mentioned conventional drawbacks. First, in FIG. 2,
reference numeral 7 denotes a frame formed of a highly conductive metal J, and a terminal 8 is
formed on a part of the circumferential side of the frame 3 7 by cutting and raising. At the inner
bottom of the frame 7, a piezoelectric vibrator 10 composed of a piezoelectric element provided
with electrodes on the upper and lower surfaces is connected by an elastic conductive adhesive 9
such as a silicone-based adhesive mixed with silver powder. Also, the electrode on the lower
surface of the piezoelectric imaging element 1 o and the frame 7 are electrically connected by
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the conductive adhesive 9. The diaphragm 11 formed in the shape of a cone by a metal foil
having conductivity or a synthetic resin film having a metal layer formed on the surface is
bonded to the center of the upper surface of the piezoelectric vibrator 1o by solder or a
conductive adhesive. The peripheral portion of the diaphragm 110 is electrically insulated and
coupled to the peripheral portion of the frame 7 via a spacer 12 made of an insulator. 1, a gasket
13 made of a conductive material is electrically and mechanically coupled on the circumferential
surface of the diaphragm 110 fixed on the spacer 12, and the electrode on the upper surface of
the piezoelectric vibrator 10 is The diaphragm plate 11 is electrically connected to the gas plate
13. 1 No. 17 or 4 [-] By adopting such a configuration, as shown in FIG. 3, when incorporated
into a speaker box or a case of a radio receiver or a television receiver formed of a conductive
material, The gasket 14 contacts the case 14 and the terminal 8 of the frame is soldered and
connected to the printed circuit board 15 provided in the case 14 as shown in FIG. The
piezoelectric speaker can be operated only by applying the input signal to the circuit, and the
work of wiring using the lead wire can be completely eliminated.
As described above, since the piezoelectric speaker according to the present invention is
configured, the wiring operation when incorporated into various acoustic devices becomes
extremely easy, the configuration can be simplified, and the practical value is increased.
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