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JPH04123690

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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH04123690
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
device for use in water, in particular in depth, for example an acoustic transducer or a sensor for
containing a magnetic detection device and associated electronic circuits and maintaining a
watertight function. It relates to a structure.
[0002]
2. Description of the Related Art Heretofore, this type of structure incorporates an electronic
circuit for transmission and reception with an acoustic-electric converter, a magnetic-electric
converter, etc., and has an opening direction and an external medium. In order to transmit and
receive signals through water, the inside of the structure is filled with a synthetic resin
compound to mechanically protect the internal components, ie, the converter and the electronic
circuit, etc. from water pressure, and electrically connect the electric circuit. It was insulated. As
shown in FIG. 3, the integrated converter 1 b and the electronic circuit 2 b are fixed to the
watertight housing 3 b by the holding plate 6 and the set screws 7 a to 7 b, and the compound 5
b is filled from above. However, in such a structure, even if there is a groove 8b for embedding in
the watertight housing 3b, a gap is generated between the watertight housing and the compound
due to deterioration or shrinkage of the compound 5b due to aging, and water leaks from this.
There is a disadvantage that electrical insulation deterioration occurs in the circuit system.
[0003]
04-05-2019
1
[0003] In order to eliminate these drawbacks, the present invention reduces the amount of
shrinkage of the compound between the built-in article and the compound, and strengthens the
adhesion with the watertight housing. A fixture is provided in the compound filling portion of the
watertight housing, and it is an object of the present invention to provide a sensor structure
having high reliability against watertightness.
[0004]
[Means for Solving the Problems] That is, according to the present invention, in a sensor
structure formed by filling a watertight rod with a compound, a plurality of openings are formed
in a cylindrical portion having a hollow disc-shaped rod. A fixture having a plurality of slits in the
buttocks, and a cutting section extending between the two, a watertight housing on the inner
circumferential surface and having a groove for fitting with the butts of the fixture, a converter,
and A sensor structure characterized in that a built-in component such as an electronic circuit
and the like and a fixture are made into a water-tight container filled and sealed with a
compound.
[0005]
That is, according to the present invention, in a sensor structure in which a watertight container
is filled with a compound, a cylindrical portion having a hollow disc-like ridge has a plurality of
openings and a plurality of slits are provided in the ridge and A fixture having a cutting portion
extending over the cylindrical portion and the ridge portion, and a watertight housing having a
groove on the inner circumferential surface that engages with the ridge portion of the fixture, a
built-in article such as a converter and an electronic circuit, and a fixture The sensor structure is
characterized in that it is sealed, and the inside of the watertight housing is filled and formed
with a compound.
[0006]
[Functions] A plurality of openings are provided in a cylindrical portion having a hollow disc-like
ridge, a plurality of slits are provided in the ridge, and a fixing having a cut portion extending
between the cylindrical portion and the ridge The groove and the ridge of the watertight
container are fitted to each other and mounted on the watertight container, and the converter,
the electronic circuit and the like are sealed with the compound to the watertight container to
provide a highly reliable sensor structure for watertightness. .
[0007]
04-05-2019
2
FIG. 1 is a partial cross-sectional perspective view of an embodiment of a sensor structure
according to the present invention.
The sensor structure has a watertight housing 3a containing the integrated converter 1a, the
electronic circuit 2a, and a fixture shown in FIG. 2 and fitted in the groove 8a on the inner
peripheral surface of the watertight housing 3a. 4 and the compound 5a filled from above.
As shown in FIG. 2, the fixing tool 4 is a slit for temporarily reducing its diameter and putting it
in the watertight housing 3 a, and fitting the groove 8 a of the watertight housing to smoothly
return the diameter of the fixing tool. 12 and a cutting unit 13 are provided.
Further, the filled compound is embedded to provide a cylindrical portion of the fixture for
reducing radial and circumferential contraction and movement, and the opening 11 therein.
The fixture 4 shown in FIG. 2 of the embodiment according to the present invention has a
function of fixing the integrated transducer 1a and the electronic circuit 2a in the watertight
housing and suppresses the floating of the compound caused by the internal pressure increase or
the external pressure decrease. Combined with the
[0008]
As described above, the sensor structure according to the present invention has the opening
portion and the slit outwardly from the opening portion, and the fixing member is structured
such that the slit is fitted in the groove of the watertight container. By using the above, it has
become possible to provide a sensor structure having a simple structure and high reliability
against water tightness.
[0009]
Brief description of the drawings
[0010]
1 is a partial sectional perspective view of a sensor structure according to the present invention.
[0011]
04-05-2019
3
2 is an enlarged perspective view of a fixture constituting a sensor structure according to the
present invention.
[0012]
3 is a partial cross-sectional perspective view showing a conventional sensor structure.
[0013]
Explanation of sign
[0014]
DESCRIPTION OF SYMBOLS 1a converter 1b converter 2a electronic circuit 2b electronic circuit
3a watertight housing 3b watertight housing 4 fixture 5a compound 5b compound 6 pressing
plates 7a, 7b, 7c, 7d set screw 8a groove 8b groove 11 opening 12 slit 13 cut portion
04-05-2019
4
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