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DESCRIPTION JPH11295280

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DESCRIPTION JPH11295280
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
ultrasonic probe used to inspect the condition of a flaw of a metal member or the like.
[0002]
2. Description of the Related Art An example of a conventionally used ultrasonic probe will be
described with reference to the side view of FIG. 4. A piezoelectric element which vibrates by
applying an electric signal to the inside of the tip 2 side of the main body 1 Three are provided.
[0003]
The transmission / reception cable 4 connected to the piezoelectric element 3 is not usually
attached directly to the main body 1 in order to be easily replaced in the event of damage, and
the connector 5 separate from the main body 1 is not Attach the end, and project the connection
projection 7 at the rear end 6 of the main body 1, fit the connector 5 to the connection projection
7 and lock the connector 5 with the lock mechanism 8 so that the connector 5 does not come off
the connection projection 7. By connecting the connector 5 to the rear end portion 6 of the main
body 1, the transmission / reception cable 4 is connected to the piezoelectric element 3.
[0004]
Then, the distal end 2 of the main body 1 is brought into contact with a portion to be flawed, a
pulse voltage is applied to the piezoelectric element 3 from the transmission / reception cable 4
to vibrate the piezoelectric element 3 to emit ultrasonic waves, and the reflected wave is
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detected. It is designed to inspect the condition of the wound etc. of the place to be done.
[0005]
However, when the connector 5 is connected to the rear end 6 of the main body 1, the
transmission / reception cable 4 extends from the connector 5 in a direction perpendicular to the
rear end 6 of the main body 1, as shown in FIG. In order to detect a narrow portion such as the
inner surface of the small diameter tube 9 as shown in FIG. 1, the main body 1 with the
connector 5 connected can not be inserted into the narrow portion or the connector 5 is
connected. Even if the main body 1 in the state can be inserted in a narrow place, as shown in
FIG. 5, the transmitting and receiving cable 4 is forcibly bent at the base of the connector 5 and
disconnection of the transmitting and receiving cable 4 occurs frequently. There was a problem.
[0006]
An object of the present invention is to solve such a problem, and to provide an ultrasonic probe
which is capable of flaw detection even in a narrow area and in which the transmitting and
receiving cables are not forcibly bent. .
[0007]
The invention according to claim 1 comprises a main body having a piezoelectric element inside
its tip, an engagement groove provided in the rear end of the main body in the lateral direction of
the main body, and the engagement groove. A main body side contact attached to the inner
surface of the mating groove and connected to the piezoelectric element, a connector capable of
engaging and disengaging with the engaging groove of the main body, and the connector parallel
to the engaging and disengaging direction with respect to the engaging groove And a connectorside contact attached to the connector and connected to the connector and connected to the
main-body-side contact when the connector is connected to the engagement groove and engaged
with the engagement groove. The ultrasonic probe according to the invention is characterized in
that the transmitting and receiving cable is connected to the piezoelectric element by engaging
the connector with the engaging groove from the lateral direction of the main body, and the
transmitting and receiving cable extends in the lateral direction of the main body. Book In the
connector longitudinal dimension when bound is reduced and it is possible to flaw the narrow
portion in a state that does not bend the transceiver cable.
[0008]
The invention according to claim 2 comprises a main body side contact exposed in a recess
formed on the inner surface of the engagement groove, and a connector side contact which is
inserted into the recess and resiliently applied to contact the main body side contact. According
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to the ultrasonic probe of claim 1, characterized in that when the connector is engaged with the
engaging groove of the main body, the connector side contact is elastic and the recess of the
inner surface of the engaging groove And the main body side contact is brought into contact, and
the connection of the connector with the main body is maintained, so that the locking mechanism
of the connector with respect to the main body is not necessary.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described below with reference to the drawings.
[0010]
FIG. 1 is a longitudinal side view of an example of an embodiment of the present invention, FIG. 2
is a front elevational view thereof, and FIG. 3 is a perspective view showing a part of the main
body of the embodiment of the present invention As shown in FIGS. 1 to 3, the tip end 11 side of
the main body 10 is a tip end side housing 12 formed in a metal box shape, and the rear end 13
side of the main body 10 is made of block metal. The connection portion 15 between the front
end side housing 12 and the rear end side housing 14 is integrally joined by an adhesive,
brazing, screw joint or the like to form the main body 10. There is.
A piezoelectric element 16 that vibrates by applying an electrical signal is provided inside the tip
11 of the main body 10.
[0011]
Horizontal notches 17 and 17 are formed on both sides of the rear end side housing 14 on the
side of the rear end 13 of the main body 10 opposite to the front end side housing 12, and the
horizontal notches 17 and 17 are formed The engagement groove 19 in which the overhanging
portion 18 is formed is horizontally provided in a state of extending in the lateral direction of the
main body 10.
[0012]
One main body side contact 21 surrounded by a nonconductive material 20 such as a resin is
provided at the center of the lower inner surface of the engagement groove 19.
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The upper end portion of the main body side contact 21 is located lower than the upper end
portion of the nonconductive material 20 located therearound, and the upper end portion of the
main body side contact 21 is exposed at the recess 22 on the inner surface of the engagement
groove 19. It is in a state of
The main body side contact 21 is connected to one pole of the piezoelectric element 16 by a lead
wire 23.
[0013]
The above-described metal rear end housing 14 is entirely the other main body side contact, and
is connected to the other pole of the piezoelectric element 16 by the lead wire 24.
[0014]
On the other hand, the connector 26 attached to the end of the transmission / reception cable 25
shown in FIG. 1 is shown in FIGS. 1 and 2 on the lower surface of the flat non-conductive base 27
flat in the extension direction of the transmission / reception cable 25. One connector side
contact 28 is attached to the upper surface of the nonconductive base 27 and the other
connector side contact 29 is fixed.
[0015]
The length of the nonconductive base 27 is substantially equal to the length of the engagement
groove 19 as shown in FIG. 1, and the width of the nonconductive base 27 is shown in FIG. The
dimension of the nonconductive base 27 is approximately equal to the distance between the
inner surfaces of the horizontal notches 17 of the engagement groove 19, and the thickness of
the nonconductive base 27 is greater than the height of the horizontal notches 17. The
dimensions are smaller by the thickness of.
[0016]
One of the connector contacts 28 attached to the lower surface of the nonconductive base 27 is
made of an elastic metal such as phosphor bronze, and in the free state, the lower central portion
of the nonconductive base 27 It is designed to keep the shape bulging downward in the vicinity.
[0017]
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The connector-side contact 29 fixed to the upper surface of the nonconductive base 27 is a
rectangular metal block, and its length is the same size as the nonconductive base 27 as shown in
FIG. The width is substantially equal to the distance between the inner surfaces of the projecting
portions 18, 18 of the engagement groove 19 as shown in FIG.
[0018]
The connector-side contacts 28 and 29 described above are individually connected to two lead
wires (not shown) in the transmission / reception cable 25 or coaxial cables.
[0019]
As described above, the width of the nonconductive base 27 is substantially equal to the distance
between the inner surfaces of the horizontal incisions 17 and 17, and the thickness of the
nonconductive base 27 is equal to that of the horizontal incision 17. Is smaller than the height of
the connector contact 28 by the thickness of the connector contact 28, and the width of the
connector contact 29 is approximately equal to the distance between the inner surfaces of the
horizontal notches 17, 17 26 can be closely inserted into the engagement groove 19 of the main
body 10 from the right side of FIG.
[0020]
As the connector 26 is inserted into the engagement groove 19, the portion swelling below the
connector contact 28 attached to the lower surface of the nonconductive base 27 is pushed
against the lower surface of the engagement groove 19, It comes flat against contact with the
lower surface of the nonconductive base 27 against elasticity, and is inserted into the engaging
groove 19 together with the nonconductive base 27.
[0021]
When the location where the tendency toward the lower side of the connector side contact 28 is
provided reaches the recess 22, the location where the tendency to the lower side of the
connector side contact 28 is provided expands into the recess 22. After being restored to the
shape, it is fitted into the recess 22 and comes into contact with the upper end of the main body
side contact 21.
[0022]
In this state, the entire connector 26 substantially fits in the engagement groove 19, and the
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connector side contact 29 fixed to the upper surface of the nonconductive base 27 is an
overhang formed on the rear end side housing 14. It comes into contact with the inner surface of
the portion 18.
The transmission / reception cable 25 extends laterally from the rear end side housing 14 of the
main body 10.
[0023]
In addition, since the portion bulged to the lower side of the connector side contact 28 is inserted
into the recess 22 by elasticity, the connector 26 does not have to be provided with the locking
mechanism between the main body 10 and the connector 26. Thus, it is possible to hold the
engaged state of the engagement groove 19.
And one pole of the piezoelectric element 16 is connected to one lead wire (not shown) in the
transmission / reception cable 25 through the lead wire 23, the body side contact 21 and the
connector side contact 28, and the other pole of the piezoelectric element 16 is It will be in the
state where it was connected to the other lead which is not illustrated in transmitting and
receiving cable 25 via lead wire 24, rear end side housing 14, and connector side contact 29.
[0024]
As described above, since the connector 26 is substantially accommodated in the engagement
groove 19 of the main body 10, and the transmission / reception cable 25 extends laterally from
the rear end side of the main body 10, narrow surfaces such as the inner surface of the small
diameter pipe 9 of FIG. Even in the case of flaw detection, flaw detection can be performed by
inserting the main body 10 into a narrow location without bending the transmission / reception
cable 25.
[0025]
When removing the transmission / reception cable 25 from the main body 10, when the
connector 26 is moved in the direction of the transmission / reception cable 25 with a strong
force with respect to the main body 10, the portion swelling below the contact 28 on the
connector side is from the recess 22 The connector 26 can be pulled out of the engagement
groove 19 by coming out and being pushed against the lower surface of the engagement groove
19 to flatten against the elastic force.
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[0026]
According to the first aspect of the present invention, since the transmitting and receiving cable
extends in the lateral direction of the main body, the main body can be inserted in a narrow place
without bending the transmitting and receiving cable to perform flaw detection, and the
transmitting and receiving cable is damaged. In this case, removing the connector from the main
body has the effect of being able to replace the transmission and reception cables independently
of the main body.
[0027]
According to the second aspect of the present invention, the connector side contact imparted
with elasticity is fitted into the recess formed on the inner surface of the engagement groove to
keep the connector engaged with the engagement groove of the main body, so that the main
body and the connector There is an effect that the mechanism can be simplified without
providing a lock mechanism between them.
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