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JPS54109483

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DESCRIPTION JPS54109483
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a piezoelectric element in
an embodiment of a piezoelectric sounding body according to the present invention, FIG. 2 is an
exploded perspective view of an embodiment of the present invention, and FIG. FIG. 4 is a crosssectional view after assembly. 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · 6,7 ...... lead, 8 ..... tubular projecting, 9 ...... lower case, 10 ° 11 ......
pipe-shaped terminal.
Detailed Description of the Invention The fifteenth invention relates to a piezoelectric sounding
body which emits sound by applying an AC signal L-1 / J ヮ qllB 32 °, and its purpose is to be
driven at a low current. An object of the present invention is to provide an object having a thin
shape, a simple structure, an easy mounting and a high sound pressure which is easy to
assemble. Conventionally, as a device that generates an audio signal by applying an AC signal,
many use an electromagnetic effect such as a speaker or an electromagnetic buzzer, and the
configuration thereof is an imaging plate or magnetism of a magnetic body by an electromagnet
VC having a coil wound around a core. There is one that vibrates a cone attached to the body to
make a sound. Such a configuration is difficult to thin because of the structure of mounting the
electromagnet under the diaphragm, and even the recent small ones have been almost impossible
if they are less than 1 (Mill or less. Moreover, the biggest drawback is that it consumes a large
amount of current due to the current drive type in which the current is fed to the coil. The
present invention relates to a piezoelectric sounding body utilizing the effect of generating a
sound by applying an alternating current signal to a piezoelectric element known in the prior art,
and the configuration thereof is as follows: ing. 3-. First, FIG. 1 shows a piezoelectric relief
member used for the sound generating body of the present invention, and 2 is a thin metal plate,
and this metal plate 2VC adhesive etc., is a thin piezoelectric element polarized in the thickness
direction and printed with electrodes. 1 is bonded to form an asymmetric bimorph structure.
Reference numerals 6 and 7 denote lead wires electrically connected to the electrodes of the
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piezoelectric element 1 having the piezoelectric element H. When an alternating current signal is
applied to both ends of the piezoelectric element 10, a bending and taking action is performed to
generate a sound according to the alternating current signal-and when the outer periphery of the
metal plate 2 is fixed, finger movement of the outer periphery disappears and a central portion is
obtained. Shoots and generates a sound. Therefore, in order to make good use of the movement
of the piezoelectric element without killing it, it is necessary to fix the element well. In the
present invention, as shown in FIG. 2 to FIG. 4, the camp-like upper case 3 having the lower
surface open and the through hole 4 at the center of the earth surface and the step 5 at the lower
part of the ceiling surface utilizing the cylindrical collision ... two s, under the force 8 Nihaipu
shaped Tanriko 10.11 also to have the upper periphery was come buried Chuang Koos 9 case
31'c fitted 4 child, the The present invention provides a piezoelectric sounding body in which the
piezoelectric element is entrapped between the step portion 5 of the upper case 3 and the
cylindrical projection 8 of the lower case 9. The following VC assembly structure will be
described. The lead wire 6.7 of the piezoelectric element is inserted into the pipe-shaped terminal
10.11 by VC, and electrically connected to the terminal 10.11 by soldering or the like.
In this case, the lead wires 6 and 7 may be taken out of the terminals IQ and 11 and solder
dipping may be performed. Next, the upper case 3 is placed over the% 1c of the cylindrical
protrusion 8 and the upper case 3 and the lower case 9 are adhered or welded and fixed. Thus,
the outer periphery of the metal plate 2 of the piezoelectric element is fixed between the upper
case 30 stepped portion 6 and the cylindrical projection 8 of the lower case 9. In addition, even if
the squib-shaped terminal 10.11 is in the form of a screw, h4 <, the lead wires 6 and 7 are
inserted and electrically connected, and then the terminal 10.11 is crimped by caulking the base
from the lower case 9. (It is also possible to fix the r when fixed to the piezoelectric sounding
body by こ う ・ ・, ・ '· lead element of the piezoelectric element 6, 7 and terminals 10 ° 1-7,
1.!:. Electrical connection power is very easy. Mallow · The piezoelectric sounding body can be
directly inserted into the printed circuit board in order to be attached to the device. Moreover,
compared with the conventional sounding body, the thing of about 5n thinness 10111 or less
can be manufactured. Since the piezoelectric element can be driven only by applying a voltage
(voltage driven type), if there is a voltage of 10 V, a sound pressure of 80 dB or more can be
obtained with a current of 1 mA or less. As described above, the piezoelectric sounding body
according to the present invention has a low current, can be driven and has a high sound
pressure, and can be easily mounted in a structure directly attached to a printed board, and is
thin and very easy to assemble. It can be easy and cheap and will be of practical value.
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