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DESCRIPTION JPH11146878

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DESCRIPTION JPH11146878
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
ultrasonic probe, and more particularly to an ultrasonic probe constituted by a combination of an
ultrasonic transducer, a rigid case for containing a signal line, and a bush for protecting a cable
lead portion. It relates to a tentacle.
[0002]
2. Description of the Related Art An ultrasonic transducer (probe) applies an ultrasonic
transducer to a human body, receives ultrasonic waves reflected inside the human body with an
ultrasonic transducer, and generates an ultrasonic image of the human body. Used to generate.
The ultrasonic probe has a structure in which an ultrasonic transducer and a signal wire are
accommodated in a rigid casing, and a bush for protecting the lead-out portion of a cable in
which the signal wires are bundled is combined with the rigid casing . As an example of the
configuration of a conventional ultrasonic probe case, one disclosed in Japanese Utility Model
Application Laid-Open No. 2-109607 is known. FIG. 5 shows a front view of a partial longitudinal
section of a conventional ultrasonic probe casing. The configuration of a conventional ultrasonic
probe case will be described with reference to FIG.
[0003]
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The housing of the ultrasonic probe is composed of a combination of a rigid housing 3 of plastic
material and a bush 6 of rubber material. The rigid housing 3 seals the ultrasonic transducer 1
and the signal line 2 which transmit and receive ultrasonic waves, and protects the ultrasonic
transducer 1 and the signal line 2 inside from external impact and disinfectant chemicals. The
cable 4 protects the plurality of signal lines 2 with an insulating material. As shown in FIG. 6,
when the cable 4 is bent, bending load is concentrated on the end 5 of the cable lead-out portion
of the rigid housing 3. The bush 6 prevents disconnection of the signal line 2 from bending load
generated by bending of the cable 4. Another purpose of the bush 6 is to improve operability.
The rigid housing 3 and the bush 6 are fixed by combining the fixing groove 7 of the bush 6 and
the bush fixing projection 8 of the rigid housing 3. In addition, there is also a housing structured
to be bonded with a silicone adhesive.
[0004]
However, in the case of the above-mentioned conventional ultrasonic probe, as shown in FIG. 6,
the bush 6 or the cable portion 4 drawn from the bush 6 is bent by an excessive force. When
tension is generated, stress is applied in the cable drawing direction of the bush 6. Since the bush
6 is an elastic body, this stress is applied to the joint 5 between the rigid housing 3 and the bush
6 via the bush 6. On the other hand, since the rigid casing 3 is an inelastic material, the stress
applied to the joint portion 5 can not be relieved by the elongation of the rigid casing material,
and the stress is concentrated on the joint portion 5 of the rigid casing 3 and the bush 6 Do. At
this time, since the adhesive layer of the silicone-based adhesive used to bond the rigid housing 3
and the bush 6 is as thin as several tens of μm, absorption of stress to the joint 5 due to
elongation of the adhesive layer is hardly performed. If the stress on the joint 5 generated by
bending or tension of the cable 4 greatly exceeds the elastic force and the adhesive force of the
adhesive layer, peeling or a gap in the joint 5 of the rigid housing 3 and the bush 6 on the cable
lead side May occur. There is a problem that the waterproofness to the inside of the housing and
the appearance are impaired due to the gap of the joint 5 generated by these excessive
operations.
[0005]
The present invention solves the above-mentioned conventional problems. Even if the cable or
bush is bent or pulled by an excessive force, no peeling or gap is generated at the junction of the
rigid casing and the bush, and the waterproofness is achieved. An object of the present invention
is to provide an excellent ultrasonic probe.
[0006]
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SUMMARY OF THE INVENTION In the present invention, in order to solve the above problems,
an ultrasonic probe, a rigid casing for containing an ultrasonic transducer and a signal line, and a
bush for protecting the lead-out portion of a cable And a stress absorbing layer made of an
elastic adhesive is provided in the gap between the rigid housing and the joint portion of the
bush.
With this configuration, even if the cable or bush is bent or pulled with an excessive force, no
peeling or gap is generated at the joint of the rigid housing and the bush, and the ultrasonic
probe has excellent waterproofness. Is obtained.
[0007]
In addition, the ultrasonic probe is configured by combining an ultrasonic transducer, a rigid
casing for containing a signal line, and a bush having a notch on the outer periphery of the end,
and forming a stress absorbing layer of elastic adhesive on the notch. The With this
configuration, even if the cable or bush is bent or pulled with an excessive force, no peeling or
gap is generated at the joint of the rigid housing and the bush, and the ultrasonic probe has
excellent waterproofness. Is obtained.
[0008]
Further, in the ultrasonic probe, a rigid casing having a notch at the outer peripheral portion of
the end and a bush are combined, and a stress absorbing layer of an elastic adhesive is formed at
the notch. With this configuration, even if the cable or bush is bent or pulled with an excessive
force, no peeling or gap is generated at the joint of the rigid housing and the bush, and the
ultrasonic probe has excellent waterproofness. Is obtained.
[0009]
According to the first aspect of the present invention, there is provided a rigid casing for
accommodating an ultrasonic transducer and a signal line, and a flexible material for protecting a
lead-out portion of a cable obtained by bundling the signal line. In the ultrasonic probe
combining the above bushes, a stress absorption layer of an elastic adhesive is formed at the joint
portion of the rigid housing and the bush, and the bush is bent by the elastic force of the stress
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absorption layer. Has the effect of absorbing, relieving and reducing stress due to
[0010]
According to a second aspect of the present invention, in the ultrasonic probe according to the
first aspect, the outer peripheral portion of the end of the bush is provided with a notch, and the
notch of the joint portion between the rigid casing and the bush A stress absorbing layer of an
elastic adhesive is formed on the part, and the elastic force of the stress absorbing layer has the
function of absorbing the stress due to the bending of the bush and relaxing or reducing it.
[0011]
According to a third aspect of the present invention, in the ultrasonic probe according to the first
aspect, a notch is provided in an outer peripheral portion of an end of the rigid casing, and a joint
portion between the rigid casing and the bush is provided. A stress absorbing layer of an elastic
adhesive is formed at the notched portion, and the elastic force of the stress absorbing layer has
an effect of absorbing stress due to bending of the bush and relaxing or reducing it.
[0012]
Hereinafter, embodiments of the present invention will be described in detail with reference to
FIGS. 1 to 4.
[0013]
(First Embodiment) A first embodiment of the present invention is an ultrasonic probe in which a
stress absorbing layer of an elastic adhesive is formed at the junction of a rigid housing and a
bush.
[0014]
FIG. 1 is a view showing an ultrasonic probe according to a first embodiment of the present
invention.
The ultrasonic transducer 1 is a piezoelectric element that converts an electric signal into
mechanical vibration to emit an ultrasonic wave, and receives an ultrasonic wave to convert it
into an electric signal.
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The signal line 2 is a line that transmits these electric signals from the signal processing circuit to
the piezoelectric element and transmits the electric signals from the piezoelectric element to the
signal processing circuit.
The cable 4 is obtained by protecting a bundle of a plurality of signal lines with a sheath of
insulating material.
The rigid housing 3a protects the ultrasonic vibrator 1 and the signal line 2 from the
environment and impact of the outside world and protects the patient from electricity, and is
made of a molded insulating plastic material.
[0015]
The bush 6a is elastic like a rubber to which polyvinyl chloride, silicone resin or filler is added in
order to ease the rapid bending stress generated at the corner of the end of the rigid housing 3a
when the cable 4 is bent. It is a hollow cylinder molded with a material.
The cable 4 is passed through the hole of the bush 6a and combined with the rigid casing 3a.
When combined, the rigid housing 3a and the bush 6a are bonded with a previously applied
adhesive. After combining, an elastic adhesive is applied to the boundary between the rigid
housing 3a and the bush 6a and hardened to form the stress absorbing layer 10a.
[0016]
Silicone rubber, urethane rubber, or cyanoacrylate-based instant adhesive is used as the adhesive
of the combination of the rigid housing 3a and the bush 6a and the elastic adhesive filled in the
joint.
[0017]
The operation and effects of the ultrasonic probe configured as described above will be described
with reference to FIG.
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When the cable 4 and the bush 6a are bent with an excessive force, if the rigid housing portion is
strongly held or mechanically fixed by hand, the stress due to the bending of the bush 6a
becomes that of the rigid housing 3a and the bush 6a. At the end, it acts on a stress absorbing
layer 10a formed of an elastic adhesive. The stress absorbing layer 10a is more elastic than the
bush 6a, and thus absorbs and relieves stress.
[0018]
In addition, the adhesion between the bottom of the joint and the rigid casing 3a improves the
tensile strength. By reducing the stress acting on the adhesive interface of the joint in the
direction perpendicular to the cable 4 between the rigid housing 3a and the bush 6a, the
mechanical strength against bending and pulling is increased, and the adhesive boundary
between the rigid housing 3a and the bush 6a It is possible to prevent the occurrence of peeling
and gaps.
[0019]
For the above reasons, the filling width of the elastic adhesive is more effective as it is wider, but
as the width becomes wider, it becomes difficult to form a uniform thickness and the appearance
finish becomes difficult. When the filling width is wide, the material of the elastic adhesive is
likely to be broken due to bending stress, so the width of the stress absorbing layer is preferably
0.5 mm to 5 mm.
[0020]
As described above, according to the first embodiment of the present invention, by forming a
stress absorbing layer with an elastic adhesive at the end of the bush, the boundary between the
rigid casing and the bush due to the bending of the cable is obtained. It is possible to make the
gap less likely to occur and to improve the waterproofness.
[0021]
Second Embodiment In the second embodiment of the present invention, a notch is provided in
the outer peripheral portion of the end of the bush, and the stress absorption of the elastic
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adhesive is made in the notch at the joint of the rigid casing and the bush. It is an ultrasonic
probe which formed a layer.
The second embodiment is different from the first embodiment in that a notch is provided in the
outer peripheral portion of the end of the bush.
[0022]
FIG. 3 is a partially longitudinal front view showing a combination of a rigid casing 3a and a bush
6b of an ultrasonic probe according to a second embodiment of the present invention. In the
present embodiment, as shown in FIG. 3, the rigid housing 3a and the bush 6b provided with the
notch 9 on the outer periphery of the end are combined, and the elastic adhesive is filled in the
notch 9 and hardened. The stress absorbing layer 10 b is formed. The other configuration is the
same as that of the first embodiment, and thus the description thereof is omitted.
[0023]
When the cable 4 is bent with an excessive force, the bush 6b for wrapping the cable 4 is bent in
the same direction as the cable 4 because it is an elastic body. At this time, if the rigid casing
portion is strongly held or mechanically fixed by hand, the stress due to the bending of the bush
6b is generated in the stress absorbing layer 10b provided at the junction of the rigid casing 3a
and the bush 6b. Especially works. The elastic force of the stress absorbing layer 10b acts to
absorb and relieve the stress applied to the joint of the rigid housing 3a and the bush 6b, so the
most peeling strength of the joint between the rigid housing 3a and the bush 6b Reduce the
stress applied to the weak parts of The strength against bending and pulling between the rigid
housing 3a and the bush 6b is increased, and peeling and a gap are not generated at the joint
portion of the rigid housing 3a and the bush 6b, and the waterproofness is enhanced.
[0024]
As described above, according to the second embodiment of the present invention, the notch
portion is provided on the outer peripheral portion of the end portion of the bush of the
ultrasonic probe, and the notch portion in the joint portion of the rigid casing and the bush is
elastic. By forming a stress absorbing layer of adhesive, the bonding area between the stress
absorbing layer and the bush is expanded, the stress applied to the bush is efficiently transmitted
to the stress absorbing layer, and a gap due to bending of the cable is less likely to be generated.
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It can be enhanced.
[0025]
(Third Embodiment) In the third embodiment of the present invention, a notch is provided in the
outer peripheral portion of the end of the rigid casing, and the elastic adhesive is used in the
notch at the junction of the rigid casing and the bush. It is an ultrasonic probe which formed the
stress absorption layer.
The third embodiment is different from the second embodiment in that a notch is provided in the
outer peripheral portion of the end portion of the rigid casing.
[0026]
FIG. 4 is a front view, partly in vertical section, showing a combination of a rigid casing and a
bush of an ultrasonic probe according to a third embodiment of the present invention. In the
present embodiment, as shown in FIG. 4, the rigid housing 3b provided with the notch 11 on the
outer periphery of the end is combined with the bush 6c, and the elastic adhesive is filled in the
notch 11 and cured to obtain stress. An absorption layer 10c is formed. The other configuration
is the same as that of the first embodiment, and thus the description thereof is omitted.
[0027]
As described above, according to the third embodiment of the present invention, the notch
portion is provided on the outer peripheral portion of the end portion of the rigid casing of the
ultrasonic probe, and the notch portion in the joint portion of the rigid casing and the bush Since
the stress absorbing layer of the elastic adhesive is formed, the bonding area between the stress
absorbing layer and the bush is expanded, and the stress applied to the bush is efficiently
transmitted to the stress absorbing layer, making it difficult to form gaps due to bending of the
cable Can be enhanced. In addition, the provision of the notches in the rigid casing has the
advantage of facilitating the manufacture of a bushing that is difficult to form in a complex
shape.
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[0028]
In the description of the second and third embodiments, the example has been described in
which the bush and the rigid casing having the notch on the outer peripheral portion of the end
are formed, but a part of the outer peripheral portion of the other end is described. Also with
respect to a bush having a notch, a rigid casing having a notch at a part of the outer peripheral
portion of the end, or a combination of a rigid casing having such a configuration and a bush to
form a stress absorbing layer by an elastic adhesive. , Can be implemented as well.
[0029]
In each of the above embodiments, although one stress absorbing layer has been described, a
ring made of rubber or plastic material is sandwiched between the notches, and a plurality of
stress absorbing layers are formed on the rigid casing side and the bush side. Also, it is possible
to increase the absorption of stress due to bending.
[0030]
Further, as the elastic adhesive filled in the notch portion of each embodiment described above,
for example, silicone rubber, urethane rubber, or cyanoacrylate type instantaneous adhesive is
used, and in the case of silicone rubber, for example, Shin-Etsu Chemical Co., Ltd. There are KE48W manufactured by DIC, 734 manufactured by Dow Corning Co., Ltd., or XE11-A5133
manufactured by Toshiba Silicone Co., Ltd. Among cyanoacrylate adhesives, there is a flexible
Aron Alpha # 900 series manufactured by Toa Gosei Co. .
In these cases, the width of the stress absorbing layer is preferably about 0.5 mm to 3 mm.
[0031]
As described above, according to the present invention, the housing of the ultrasonic transducer
constituted by the combination of the rigid housing portion for housing the ultrasonic transducer
and the bush for protecting the lead-out portion of the cable Since a stress absorbing layer made
of an elastic adhesive is formed at the joint of the body and the bush, it is possible to absorb and
relieve the stress on the joint boundary which is generated when the cable or bush is bent
excessively. The effect of being able to prevent the occurrence of a gap and improve the
waterproofness is obtained.
[0032]
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Brief description of the drawings
[0033]
1 is a front view of a partial longitudinal section of a housing configuration of an ultrasonic
probe according to a first embodiment of the present invention,
[0034]
2 is a front view of a partial longitudinal section showing a joint portion between a rigid casing
and a bush when the cable lead-out portion according to the first embodiment of the present
invention is bent;
[0035]
3 is a front view of a partial longitudinal section showing a joint portion between a rigid casing
and a bush in the second embodiment of the present invention,
[0036]
4 is a front view of a partially longitudinal section showing a joint portion of a rigid casing and a
bush of the casing configuration of the ultrasonic probe in the third embodiment of the present
invention,
[0037]
Fig. 5 A front view of a part of a longitudinal section showing the configuration of a conventional
ultrasonic probe case.
[0038]
6 is a front view of a partial longitudinal section showing the joint portion of the rigid casing and
the bush when the cable lead-out portion in the casing configuration of the conventional
ultrasonic probe is bent.
[0039]
Explanation of sign
[0040]
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DESCRIPTION OF SYMBOLS 1 Ultrasonic transducer 2 Signal wire 3, 3a, 3b Rigid housing 4
Cable 5 Rigid housing-bush joint 6, 6a, 6b, 6c Bush 7 Fixing groove 8 Fixing projection 9 Bush
notch 10a, 10b, 10c Stress absorption layer 11 Notch of rigid housing
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