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DESCRIPTION JPS5611585

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DESCRIPTION JPS5611585
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a conventional
resin mold type underwater ultrasonic wave transceiver, and FIG. 2 is a longitudinal sectional
view of a resin mold type underwater ultrasonic wave transceiver according to the present
invention. The parts to be used are indicated by the same reference numerals. 1a: Piezoelectric
element, 1b: Vibration absorbing material, 1C: Insulated electric wire, 1 small: Insulating sheath,
ld ': Transmission / reception unit, 1d ′ ′: Protective cylindrical portion, 1e: · · Airtight sealing
material.
DETAILED DESCRIPTION OF THE INVENTION The present invention is a super oil mold type
underwater ultrasonic wave transmitter / receiver used for echo sounding or fish searching. A
conventional resin mold type underwater ultrasonic wave transmitting and receiving apparatus,
as shown in FIG. 1, has electrodes 1a1.1a # such as bustling on its own surface, etc. It is a
polarized titanium cage 1-11sS "′ ′ Ruconic acid ship And a vibration-absorbing material lb
such as sponge resin or cork disposed on the outer surface of the piezoelectric element 1a
excluding the sound wave transmitting / receiving surface (electrode surface 1a ') '. Conductor IC
'connected to 1v, IC'! A large diameter transmission / reception disturbance 1d in which the
insulated electric wire IC, which is covered and drawn outward, is covered with the piezoelectric
element 1a and the vibration absorbing material 1b and is in contact with the electrode 1an of
the sound wave transmitting / receiving surface of the piezoelectric element easily at the inner
bottom surface. Insulating sheath 1c1 which is formed integrally with starvation of a synthetic
resin, which is composed of '' and a small protective cylinder part 1d 'covering the base of the
insulated wire. Since this is to be sealed, this is attached to the holding 1fA) l protruding from the
hull and exposed to water, and the wave receiving part ld 'of the combined insulation outer ratio
receives the large water pressure to receive the above-mentioned holding Only by bending with
the fixing portion with the material H as a fulcrum (the vibration from the hull is applied, the
airtightness between the inner diameter surface of the cylinder ttd 'and the outer diameter
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1
surface of the insulated wire IC is damaged) As a result, due to long-term use, seawater intrudes
from between the protective cylindrical portion 1d 'and the insulated wire IC, and the defect of
lowering the insulation of the piezoelectric element 1a by 2- can not be pursued. The present
invention has been made to solve the above-mentioned drawbacks, and the embodiment of FIG. 2
will be described. In the figure, 1a is a piezoelectric element, 1b is a vibration absorption-1 IC is
an insulated wire connected to the electrode surface 1 ml of the piezoelectric element by a lead
1cl or lcl, and la #, ld is a transmission / reception). よヵ、677.。、。 The insulating outer
sheath sealing the piezoelectric element 1a, the vibration & absorption material 1b, and the
insulated wire 1C is shown by the casting mold, and the configuration is the same as that of FIG.
A hermetic sealing material 1e made of an elastic tMfi material such as polypropylene resin is
sealed on the inner diameter surface of the outer sleeve & 111 & 1d 'and the outer diameter
surface of the insulated wire 1c. Thus, the hermetic sealing material 1e is sealed in advance when
the insulating outer jacket 1C is cast after being tightly fitted in advance with or without using an
adhesive on the outer diameter surface of the insulated wire IC. In addition, as shown in the
figure, the end of the protective tube tld 'for sealing the insulated wire IC is preferable in view of
the mechanical strength of the protective tube portion, but it is not limited to this portion. It may
be enclosed.
As described above, since the resin mold type underwater study sound wave transmitting and
receiving device according to the present invention is inserted into the airtight sealing material
having elasticity between the inner diameter surface of the protective cylindrical portion of the
outer insulation and the outer diameter surface of the insulated wire. Even if the connection
between the protective cylinder and the insulated wire is damaged by long-term use, the
airtightness of the meat is reliably maintained, and the infiltration of seawater or warm air
reduces the insulation of the piezoelectric element. There is an effect to be taken.
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2
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