JPS57113689

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DESCRIPTION JPS57113689
Description 1, title of the invention
Ultrasonic transducer
3. Detailed Description of the Invention The present invention relates to an ultrasonic transducer,
and more particularly to an ultrasonic transducer used for high frequency. As shown in FIG. 1, an
ultrasonic transducer using mainly one kind of fourteen frequency according to the prior art has
a large number of transducer elements 1 coated on one surface of the outer casing 5 and both
transducer elements 1 ' The W / L pole 8 is connected at 1i 16 respectively, and an AC voltage is
supplied through the cable 7, and the electrostrictive effect causes the vibration iv7 to oscillate
wJt− according to the AC voltage. This q vibration is radiated from the outside through the
immersed medium of the transducer. In general, the vibrating element has a resonant frequency
that is in accordance with the mechanical properties of the material and is used at this frequency.
However, the dimensions of the vibrating element decrease in inverse proportion to the resonant
frequency, and for example, if the frequency 300 is 1 (for the electrostrictive vibrator of z, the
length of the vibrating element is 7 to 7 ′ ′ 7 m, @ is 1 to It becomes a drum about 2m / m.
Taking the electric wire to the vibrating element with such dimensions by soldering 6 etc. will
result in the fluctuation of the resonant frequency accompanied by the fluctuation of the
mechanical dimension, resulting in the change of the overall characteristics. It has the
disadvantage that it requires considerable skills and there are many opportunities for individual
differences. The present invention solves the above-mentioned drawbacks by sandwiching a
vibrating element between two s'm elastic bodies, driving it with an AC voltage through the
paper-feeding body, and taking out a provisional voltage. It provides a transducer. That is,
according to the present invention, in the ultrasonic transducer using a large number of relatively
small vibrating elements, the soldering of the electric wire for connecting the respective vibrating
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elements in the housing is conductive to the vibrating elements instead of the connection by the
etc. The elastic body EndPage: 1 is brought into contact, and the supply of power from the
outside or the extraction of the reception voltage to the outside is carried out through the
conductive body and brings about a change in resonance frequency as in conventional soldering.
, It is a book that is released from the construction method that requires a great deal of
experience. On the other hand, the vibration generated from the image pickup element is
supplied and radiated to the medium in which the housing is immersed through the conductive
semiconductor and the housing. The embodiment according to the present invention will be
described with reference to FIG. 2. As shown in FIG. 2, a plurality of imaging elements 1, two
conductive elastic members 2 in contact with the vibrator elements, and electrodes 3 in the
conductive elastic member 11 includes a line 6 and an outer case 5 accommodating these
components. Reference numeral 8 is an electrode of the vibration element, 7 is a cable which
connects the wire 6 to the outside through the outer cover 5 and is connected to the outside, and
4 is a pressure plate for preventing the elastic of the conductive elastic material 2. The vibrating
element 1 is flushed through the conductive elastic material 2 and the electrode 8 of the
vibrating element, and further the conductive elastic material 2 is connected through the cable 7
and the electrode 3 and the electrode # i 86 in the conductive elastic material, and the plurality
of vibrating elements are in parallel. The transmitter / receiver is connected by using the cable 7
as a terminal.
On the other hand, the vibration of the vibration element is radiated to the medium in contact
with the casing through the conductive elastic material 2 and the chassis 5, and constitutes a
vibration transmission system of the transducer. When the transducer is configured in such a
manner, the electrodes 2 of the vibrating element 1 are connected to each other as shown in the
conventional embodiment. The L-line is unnecessary, and the soldering for connecting the wire
and the electrode can save the process number such as # 1 or has the effect of preventing the
fluctuation of the resonant frequency of the vibrating element accompanying the soldering.
Further, the relative positions of the plurality of vibration elements on the conductive elastic
body can be arbitrarily arranged in a car, so that the directivity characteristics at the time of
vibration radiation can be arbitrarily designed. In the present invention, as described above, one
or more of the at least one vibration element 1, the conductive elastic material 2 which is
connected to the vibration element 1, the electric charge 1) 6 drawn from the conductive elastic
material 2, By accommodating it, fluctuation of the resonant frequency of the vibrating element
can be prevented, the connection work process between the vibrating elements can be omitted,
and the arrangement of the vibrating element can be arbitrary. There is.
4. Brief Description of the Drawings FIG. 1 is a simplified sectional view of a conventional
ultrasonic transducer, and FIG. 2 is a sectional view of an embodiment of the present invention. 1
······ Vibrating element, 2 ··· · · · Conductive elastic material, 3 · · · · · · · · · · · · Electrode (conductive
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elastic material), 4 ··· · · · · · · · · · · · · · · · · · · · · · · · · · outside Kiyo will, 6 ...... Kameaya, 7 ...... cable, 8
...... electrode (s vibrating element). @ 1 figure 2 屈 EndPage: 2
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