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JPS54159986

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DESCRIPTION JPS54159986
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a conventional
sounding body, FIG. 2 is a side sectional view of an embodiment of a calculator provided with a
sounding body according to the present invention, and FIG. FIG. 4A is a side cross-sectional view
of another embodiment of a calculator provided with a sound generator according to the present
invention. FIG. In the figure, 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 и и и и и и и и и и и и и и и и
display Device, 6 и и и и и и и и Plastic cabinet 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 и и и и и и и и и и и и и и и и и и и и и Ceramic element, 11 иииииии Power supply.
DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a sound
generator comprising a piezoelectric ceramic beam or the like. The following description will be
given by taking a sounding body composed of a ceramic element as an example. Heretofore, a
sound generator that generates sound using a ceraminc element has been suitable for use in a
small electronic device because of its low voltage, low turtleling property. A perspective view of
FIG. 1 ((outside of 1 ░ C. speaker using a conventionally used ceramic element) is shown. Here, 1
is a surfaced VC special metal, and high voltage is applied to give polarization characteristics 10,
..., r & ceramic elements, and 2 is brass or stainless steel generated by its own vibration.
Conductor plate. Then, by applying a rectangular wave voltage between the electrodes a and b,
the ceramic element is stretched and shrunk to cause the conductor plate 2 to vibrate, and the
vibration (a sound is generated by C). Here, conventionally, as a method for increasing the
volume of the sound generated by this sounding body, the sounding body is not attached to the
circuit board and is fixed to a plastic cabinet or the applied voltage of the sounding body is
boosted higher than the battery voltage. It was made to drive the above-mentioned sounding
body by making it sound, but it is still insufficient, 2 song. The object of the present invention is
to provide a cast-out bag eTh of a sound-producing body capable of increasing the volume of
generated sound by a means that is far more efficient and simpler than the above-mentioned
conventional system. Below-Tenchi? This discussion will be described in detail using 0. FIG. 2 is
04-05-2019
1
an electronic formula 2 with a sound generator involved in the present invention. If the
configuration is described, 3 is a circuit board. (21: LSI (Large Scale Integrated Circuit) 4 and
display device 5 are attached to the circuit board 3; 5 and 6 are cabinets of a plastic surface; 7 is
a through hole 7Jh drilled in the cabinet 6 It is a key which has a protruding part which
protrudes from it. The metal case 8 is disposed at the outermost part of the calculator, and the
conductor portion of the sound producing body 9 is fixed to the metal case 8 in a contact layer. If
the sounding body 9 is directly adhered and fixed to the metal case 8 as described above, the
vibration of the sounding body 9 is transmitted to the metal cous 8 so that the volume of the
sound generated in the sounding body 9 is increased by the vibration of the metal case 9 Do.
That is, in the related art, since the sound emitting body 9 is placed on an object made of
material such as plastic easily absorbing vibration, the efficiency of sound generation is very bad.
Here, the sound emitting body 9 is attached to the metal case 8 In this case, if the conductive
plate 2 of the sound producing body 9 is adhered to the metal case 8 with a conductive adhesive,
it is possible to save the trouble of providing the wiring for grounding the metal case 8.
Description of this point # 1 f ? ? L 1 ░ 6 (a) u R t Et bt 4-tr> ? ?410 ? FIG. 3 (bl is a partial
wiring circuit diagram of the calculator according to the present invention (31 is the same as FIG.
11) Is a power supply, 4 is an LSI, 9 is a sounding body, and 8 is a metal case. As shown in the
conventional example, conventionally, the metal case 8 is connected to the ground of the circuit
so that the static electricity generated in the metal case 8 adversely affects the circuit
components such as the LSI 4 and the like. However, according to the present invention, since
the metal case 8 and the sounding body 9 are connected, if the circuit configuration is performed
with the conductor portion 2 of the sounding body 9 as the earth side, the metal case 8 is also
grounded at the same time. It is not necessary to provide a wire for grounding the case 8. Next,
FIG. 4 shows another embodiment according to the present invention in which the ceramic
element j'IO is directly adhered to the metal case 8. As shown in FIG. If this is done, it is possible
to obtain a louder volume by cutting off the ceramic case 1 ░ and i = metal case 8. As described
above, according to the present invention, since the conductor plate portion of the sounding body
is adhered and fixed to the metal case of the electronic device or the tosu is constructed by
taking the conductor plate portion by the metal case (4), The sound volume of the sounding body
can be increased by a simple means.
04-05-2019
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