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DESCRIPTION JP2013027695

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DESCRIPTION JP2013027695
Abstract: The present invention provides an ultrasonic observation apparatus capable of more
reliably preventing the entry of liquid into a holding unit that holds an ultrasonic transmitting /
receiving unit. An ultrasonic observation apparatus according to the present invention comprises
an ultrasonic wave transmitting / receiving unit for transmitting / receiving ultrasonic waves in
an ultrasonic wave transmitting / receiving area which is a predetermined area in an ultrasonic
wave transmitting / receiving surface; A holding unit for holding the exposed area, an acoustic
lens unit adhered on the ultrasonic transmission / reception surface by a first adhesive to cover
the ultrasonic transmission / reception area, and the ultrasonic transmission / reception surface
The outer peripheral portion not covered by the acoustic lens portion is covered, and is disposed
so as to extend in the outer peripheral direction from the ultrasonic wave transmitting / receiving
surface, and is adhered to the acoustic lens portion and the outer peripheral portion by a second
adhesive. And a protective portion integral with the holding portion or adhered to the holding
portion by the second adhesive. [Selected figure] Figure 2
Ultrasonic observation device
[0001]
The present invention relates to an ultrasonic observation apparatus in which an acoustic lens is
bonded to an ultrasonic transmitting and receiving unit.
[0002]
BACKGROUND An ultrasonic observation apparatus is known as an apparatus for acquiring an
ultrasonic tomographic image in a subject by transmitting and receiving an ultrasonic wave to a
subject such as a living body.
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[0003]
For example, as disclosed in Patent Document 1 and Patent Document 2, the ultrasonic
observation apparatus includes an acoustic lens unit for converging the ultrasonic wave on the
ultrasonic wave transmitting / receiving surface of the ultrasonic wave transmitting / receiving
unit that transmits / receives the ultrasonic wave. Have.
The acoustic lens unit is exposed on the outer surface of the ultrasonic observation apparatus,
and is adhered to both the ultrasonic transmitting / receiving unit and the holding unit for
holding the ultrasonic transmitting / receiving unit by an adhesive.
[0004]
Japanese Patent Application Laid-Open No. 10-85219 Japanese Patent Application Laid-Open No.
2006-95178
[0005]
At the time of use or cleaning of the ultrasonic observation apparatus, an external force may be
applied to the acoustic lens portion by coming in contact with other members.
When the external force applied to the acoustic lens portion is excessive, a load is applied to the
adhesive layer between the acoustic lens and the holding portion, and there is a risk that the
holding force between the holding portion and the lens may be reduced.
[0006]
The present invention has been made in view of the above-mentioned point, and provides an
ultrasonic observation apparatus capable of more firmly fixing and holding an acoustic lens
portion of an ultrasonic wave transmission / reception portion to which an acoustic lens portion
is adhered. To aim.
[0007]
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In the ultrasonic observation apparatus according to the present invention, an ultrasonic
transmitting / receiving unit for transmitting / receiving ultrasonic waves in an ultrasonic
transmitting / receiving area which is a predetermined area in an ultrasonic transmitting /
receiving surface, and the ultrasonic transmitting / receiving unit is exposed Holding portion, an
acoustic lens portion adhered to the ultrasonic transmission / reception surface by a first
adhesive so as to cover the ultrasonic transmission / reception area, and the acoustic lens portion
of the ultrasonic transmission / reception surface Is disposed so as to cover the outer peripheral
portion not covered by the second portion and extend in the outer peripheral direction relative to
the ultrasonic transmission / reception surface, and is adhered to the acoustic lens portion and
the outer peripheral portion by a second adhesive And a protective part that is integral with the
part or adhered to the holding part by the second adhesive.
[0008]
According to the present invention, the water tightness of the outer peripheral end face of the
acoustic matching layer can be further improved, and the adhesion of the acoustic lens portion to
the ultrasonic transducer can be further strengthened.
[0009]
It is a figure explaining the composition of an ultrasound endoscope.
It is sectional drawing of an ultrasonic transmission / reception part and a holding | maintenance
part.
It is sectional drawing which shows the state which removed the acoustic lens part and the
protection part from the ultrasonic wave transmission-and-reception part.
It is sectional drawing which shows the state which removed the ultrasonic transmission /
reception part from the holding | maintenance part.
It is sectional drawing of the ultrasonic transmission / reception part of 2nd Embodiment, and a
holding part. It is a figure explaining the 1st modification of a 2nd embodiment. It is a figure
explaining the 2nd modification of a 2nd embodiment. It is a figure explaining the 3rd
modification of a 2nd embodiment. It is sectional drawing of the ultrasonic transmission /
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reception part of 3rd Embodiment, and a holding part. It is a figure explaining the procedure
which fixes an ultrasonic transmission / reception part to a holding | maintenance part in 3rd
Embodiment. It is a figure explaining the procedure which fixes an ultrasonic transmission /
reception part to a holding | maintenance part in 3rd Embodiment. It is a figure explaining the
procedure which fixes an ultrasonic transmission / reception part to a holding | maintenance
part in 3rd Embodiment. It is a figure explaining the procedure which fixes an ultrasonic
transmission / reception part to a holding | maintenance part in 3rd Embodiment. It is a figure
explaining the procedure which fixes an ultrasonic transmission / reception part to a holding |
maintenance part in 3rd Embodiment. It is sectional drawing of the ultrasonic transmission /
reception part of 4th Embodiment, and a holding part. It is sectional drawing of the ultrasonic
transmission / reception part of 5th Embodiment, and a holding part. It is sectional drawing of
the ultrasonic transmission / reception part of 6th Embodiment, and a holding part. It is sectional
drawing of the protection part of 6th Embodiment, and a cap part. It is a perspective view of a
protection part and a cap part of a modification of a 6th embodiment. It is the figure which
looked at the cap part of the modification of 6th Embodiment from the proximal end. FIG. 21 is a
cross-sectional view taken along line XXI-XXI of FIG. It is sectional drawing of the ultrasonic
transmission / reception part of 7th Embodiment, and a holding part. It is the perspective view
which decomposed | disassembled the protection part of 7th Embodiment. It is a figure which
shows the procedure which assemble | attaches the protection part of 7th Embodiment to a
front-end | tip part. It is a figure which shows the procedure which assemble | attaches the
protection part of 7th Embodiment to a front-end | tip part.
[0010]
Hereinafter, preferred embodiments of the present invention will be described with reference to
the drawings. In each of the drawings used in the following description, in order to make each
component have a size that can be recognized in the drawings, the scale is different for each
component, and the present invention It is not limited only to the number of components
described in the drawings, the shape of the components, the ratio of the size of the components,
and the relative positional relationship between the components.
[0011]
First Embodiment A first embodiment as an example of the embodiment of the present invention
will be described below. The ultrasonic observation apparatus 1 according to the present
embodiment shown in FIG. 1 schematically shows an ultrasonic tomogram of a predetermined
region in the subject by electronically scanning the ultrasonic beam in the subject. It is an
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apparatus for obtaining (B mode image). In the present embodiment, as an example, the
ultrasound observation apparatus 1 has a form of a so-called ultrasound endoscope which scans
an ultrasound beam in a subject. The form of the ultrasonic observation apparatus 1 is not
limited to the ultrasonic endoscope, and may be a form called an ultrasonic probe introduced into
the subject through the duct of the endoscope. Alternatively, the ultrasound beam may be
scanned from the outside of the subject into the inside of the subject.
[0012]
The entire configuration of the ultrasonic observation apparatus 1 is well known, and thus
detailed description will be omitted. However, a schematic configuration of the ultrasonic
observation apparatus 1 will be described below. The ultrasonic observation apparatus 1 has an
insertion portion 2 which can be introduced into the body of a subject, an operation portion 3
located at the proximal end of the insertion portion 2, and a universal cord 4 extending from the
side portion of the operation portion 3. Is mainly configured.
[0013]
The insertion portion 2 includes a distal end portion 10 disposed at the distal end, a bendable
bending portion 11 disposed at the proximal end side of the distal end portion 10, and a
proximal end side of the bending portion 11. A flexible flexible tube portion 12 connected to the
distal end side is continuously provided. The ultrasonic observation apparatus 1 may have a form
called a so-called rigid endoscope, which does not have a part having flexibility in the insertion
part 2.
[0014]
Although not shown in the distal end portion 10 of the insertion unit 2 in addition to the
ultrasonic wave transmitting / receiving unit 20 described later in detail for transmitting and
receiving ultrasonic waves, an imaging device and an illumination device for imaging an optical
image, and a treatment tool The treatment tool insertion port etc. for making it project are
provided.
[0015]
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The operation unit 3 is provided with an angle operation knob 13 for operating the bending of
the bending portion 11.
In addition, the operation unit 3 is provided with a switch or the like for controlling the fluid
delivery operation and the suction operation from the opening portion provided in the tip end
portion 10.
[0016]
At the proximal end of the universal cord 4, an endoscope connector 4a connected to a light
source device (not shown) is provided. The light emitted from the light source device travels
through the universal cord 4, the operation unit 3, and the optical fiber cable inserted into the
insertion unit 2 and is emitted from the illumination device at the distal end portion 10. The
ultrasonic observation apparatus 1 may have a configuration in which a light source device such
as an LED is provided to the illumination device disposed at the distal end portion 10.
[0017]
An electric cable 5 and an ultrasonic cable 6 extend from the endoscope connector 4a. The
electric cable 5 is detachably connected to a camera control unit (not shown) via an electric
connector 5a. The camera control unit is a device that outputs an image captured by an imaging
device provided at the distal end portion 10 to the image display device 8.
[0018]
In addition, the ultrasonic cable 6 is detachably connected to the ultrasonic observation control
device 7 via the ultrasonic connector 6 a. The ultrasonic observation control device 7 is a device
that controls the transmission / reception operation of ultrasonic waves by the ultrasonic
transmission / reception unit 20 and generates an ultrasonic tomographic image, and outputs the
ultrasonic tomographic image to the image display device 8. The ultrasonic observation
apparatus 1 may not have the ultrasonic observation control device 7 and the image display
device 8.
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[0019]
Next, the configuration of a portion where the ultrasonic transmitting / receiving unit 20 of the
ultrasonic observation apparatus 1 is disposed will be described. The ultrasonic wave
transmitting / receiving unit 20 is held by the holding unit 30, and is fixed to the distal end
portion 10 via the holding unit 30.
[0020]
The ultrasonic transmitting and receiving unit 20 is configured to transmit and receive ultrasonic
waves in an ultrasonic transmitting and receiving area 20b which is a predetermined area in the
ultrasonic transmitting and receiving surface 20a. The ultrasonic transmission / reception
surface 20 a is a part of the surface of the ultrasonic transmission / reception unit 20. The shape
of the ultrasonic wave transmitting / receiving surface 20a is not particularly limited, but in the
present embodiment, as an example, as shown in FIG. 2, the ultrasonic wave transmitting /
receiving unit 20 is an ultrasonic wave consisting of a curved surface convex toward the outside.
It has the transmission / reception surface 20a, and is comprised.
[0021]
FIG. 3 shows a state in which the acoustic lens portion 25 and the protection portion 26
described later in detail are disposed on the ultrasonic transmission / reception surface 20a in
order to make the ultrasonic transmission / reception surface 20a and the ultrasonic
transmission / reception region 20b easy to understand. It shows.
[0022]
In the following, with respect to the direction along the normal line of the ultrasonic transmission
/ reception surface 20a, the direction in which the ultrasonic transmission / reception surface
20a faces is referred to as the outer side, and the direction opposite to the direction in which the
ultrasonic transmission / reception surface 20a faces is referred to as the inner side. .
[0023]
Specifically, the ultrasonic transmission / reception surface 20a has a substantially cylindrical
surface shape.
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The ultrasonic transmission / reception area 20b is an area of a range of a predetermined angle
in the circumferential direction in the substantially cylindrical ultrasonic transmission / reception
surface 20a.
The ultrasonic wave transmitting / receiving area 20b is set to be smaller than the ultrasonic
wave transmitting / receiving surface 20a and not to overlap with the end of the ultrasonic wave
transmitting / receiving surface 20a. In other words, on the ultrasonic wave transmission /
reception surface 20a, an area in which transmission / reception of ultrasonic waves is not
performed is provided around the ultrasonic wave transmission / reception area 20b.
[0024]
The ultrasonic transmitting / receiving unit 20 can transmit an ultrasonic beam in a direction
(radial direction) along the normal line of the ultrasonic transmitting / receiving surface 20a in
the ultrasonic transmitting / receiving area 20b, and is superfluous in the circumferential
direction of the ultrasonic transmitting / receiving surface 20a. It is configured to be able to scan
an acoustic beam. That is, the ultrasound transmitting and receiving unit 20 of the present
embodiment has a configuration in which the ultrasound beam is scanned in a substantially arc
shape. Such an ultrasound beam scan format is generally referred to as electronic convex scan.
[0025]
The shape of the ultrasonic transmission / reception surface 20a may be configured by a
plurality of curved surfaces having different curvatures, or may be configured by one or a
plurality of flat surfaces. Further, the scanning format of the ultrasonic beam by the ultrasonic
transmitting and receiving unit 20 is not limited to this embodiment.
[0026]
More specifically, the ultrasonic transmitting and receiving unit 20 is configured to include the
electroacoustic transducer 21, the backing material 23, and the acoustic matching layer 22.
[0027]
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The electroacoustic transducer 21 has a configuration for mutually converting an electric signal
and an ultrasonic wave.
The configuration of the electroacoustic transducer 21 is not particularly limited as long as it can
convert the electrical signal and the ultrasonic wave to each other, but for example, a
piezoelectric element such as a piezoelectric ceramic, an electrostrictive element, or a
micromachine technology An ultrasonic transducer (MUT; Micromachined Ultrasonic
Transducer) or the like may be applied.
[0028]
In the present embodiment, as an example, the electroacoustic conversion unit 21 is configured
by a plurality of piezoelectric elements arranged in a substantially arc shape along the ultrasonic
transmission / reception surface 20a inside the ultrasonic transmission / reception surface 20a.
The plurality of piezoelectric elements are arranged to vibrate in the normal direction (radial
direction) of the ultrasonic wave transmitting / receiving surface 20a. The electroacoustic
transducer 21 is disposed within a range narrower than the ultrasonic wave transmission /
reception surface 20a. In addition, although the electrical wiring is connected to each of the
plurality of piezoelectric elements constituting the electro-acoustic conversion unit 21, they are
not shown because they have a known configuration.
[0029]
A backing material 23 is disposed inside the electroacoustic transducer 21. The backing material
23 is a member that absorbs the ultrasonic wave radiated inward from the electroacoustic
transducer 21 and the ultrasonic wave traveling from the inner side toward the electroacoustic
transducer 21. For this reason, in the present embodiment, transmission and reception of the
ultrasonic wave by the electroacoustic conversion unit 21 are performed only toward the outside
in the normal direction of the ultrasonic wave transmission / reception surface 20a.
[0030]
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The acoustic matching layer 22 is a substantially plate-like member disposed outside the
electroacoustic transducer 21, and transmits ultrasonic waves transmitted and received by the
electroacoustic transducer 21. The acoustic matching layer 22 is for reducing the difference in
acoustic impedance between the electroacoustic conversion unit 21 and the lens unit 25
described later. The acoustic matching layer 22 may have a configuration in which a plurality of
layers having different densities are stacked.
[0031]
The acoustic matching layer 22 is disposed to cover at least the entire outside of the
electroacoustic transducer 21. In the present embodiment, when the ultrasonic transmitting /
receiving unit 20 is viewed from the outer side in the normal direction of the ultrasonic
transmitting / receiving surface 20 a, the acoustic matching layer 22 extends in the outer
peripheral direction more than the outer edge of the electroacoustic transducer 21. It is
arranged.
[0032]
The acoustic matching layer 22 is a member disposed on the outermost side of the ultrasonic
transmitting and receiving unit 20 of the present embodiment. That is, the ultrasonic
transmission / reception surface 20 a of the ultrasonic transmission / reception unit 20 is the
main surface outside the acoustic matching layer 22. The ultrasonic transmission / reception
area 20 b is an area through which the ultrasonic wave transmitted / received by the
electroacoustic transducer 21 passes in the plane outside the acoustic matching layer 22.
Specifically, the ultrasonic transmission / reception area 20b substantially matches the shape of
the external shape of the electroacoustic transducer 21 projected outward on the ultrasonic
transmission / reception surface 20a.
[0033]
An acoustic lens unit 25 is disposed on the ultrasonic wave transmitting / receiving surface 20 a
of the ultrasonic wave transmitting / receiving unit 20 having the above-described configuration.
The acoustic lens unit 25 is for focusing the ultrasonic beam transmitted by the ultrasonic
transmitting / receiving unit 20.
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[0034]
The material which comprises the acoustic lens part 25 is not specifically limited, The density
suitable for acoustic impedance matching with a test object, chemical resistance, etc. are
determined. In the present embodiment, since the subject is a living body such as a human body,
the acoustic lens unit 25 is made of silicone resin as an example.
[0035]
The sectional shape of the acoustic lens unit 25 depends on the density of the material
constituting the acoustic lens unit 25, the wavelength of the ultrasonic wave transmitted by the
ultrasonic wave transmitting / receiving unit 20, the width of the ultrasonic wave transmitting /
receiving surface 20a, and the distance to converge. And is not particularly limited.
[0036]
The acoustic lens unit 25 has an outer shape that covers at least the entire ultrasound
transmission / reception region 20b and fits inside the ultrasound transmission / reception
surface 20a when viewed from the outside in the normal direction of the ultrasound transmission
/ reception surface 20a.
In the present embodiment, as an example, when viewed from the outer side in the normal
direction of the ultrasonic transmission / reception surface 20a, the acoustic lens unit 25 extends
around the ultrasonic transmission / reception region 20b, and the ultrasonic transmission /
reception surface 20a is , Extends around the acoustic lens unit 25. The acoustic lens unit 25
may have an outer shape substantially coinciding with the ultrasonic wave transmitting /
receiving area 20b when viewed from the outside in the normal direction of the ultrasonic wave
transmitting / receiving surface 20a.
[0037]
When viewed from the outside in the normal direction of the ultrasonic transmission / reception
surface 20a, the region of the ultrasonic transmission / reception surface 20a not covered by the
acoustic lens unit 25 is referred to as an outer peripheral portion 20c. In the present
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embodiment, both end portions 22a of the acoustic matching layer 22 extend in the outer
peripheral direction than both end portions 25a of the acoustic lens unit 25, and the outer
surface of the both end portions 22a corresponds to the outer peripheral portion 20c.
[0038]
The acoustic lens unit 25 is fixed on the ultrasonic transmitting / receiving surface 20 a which is
the outer surface of the acoustic matching layer 22 by a first adhesive. The type of the first
adhesive is not particularly limited, but, for example, a silicone-based adhesive is used.
[0039]
A pair of protection portions 26 is disposed on the outer surface of both end portions 22 a of the
acoustic matching layer 22. Further, the pair of protection portions 26 are in contact with both
end portions 25 a of the acoustic lens portion 25 and viewed outward from the end portion 22 a
of the acoustic matching layer 22 when viewed from the outside in the normal direction of the
ultrasonic transmission / reception surface 20 a. Out. That is, the protection portion 26 covers
the outer peripheral portion 20 c which is a region not covered by the acoustic lens portion 25 of
the ultrasonic wave transmitting / receiving surface 20 a, and is disposed to extend in the outer
peripheral direction than the ultrasonic wave transmitting / receiving surface 20 a. ing.
[0040]
The protective portion 26 is bonded to both the outer peripheral portion 20 c and the end 25 a
of the acoustic lens unit 25 by a second adhesive. Here, the unit by the second adhesive between
the acoustic matching layer 22 and the protective portion 26 is more than the adhesive strength
per unit area between the acoustic matching layer 22 and the acoustic lens unit 25 per unit area.
The material of the protective portion 25 and the type of the second adhesive are selected such
that the adhesive strength per area is higher.
[0041]
As described above, in the present embodiment, as an example, the acoustic lens unit 25 is made
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of silicone resin, and the first adhesive for bonding the acoustic matching layer 22 and the
acoustic lens unit 25 is a silicone-based adhesive. ing. Therefore, if the protective portion 25 is
made of, for example, a so-called engineering plastic such as polyimide, polyamide or
polysulfone, and the second adhesive is an epoxy-based adhesive, the second adhesive between
the acoustic matching layer 22 and the protective portion 26 The adhesive strength per unit area
by the second adhesive is higher than the adhesive strength per unit area by the first adhesive
between the acoustic lens unit 25 and the acoustic matching layer 22.
[0042]
Further, the surface of the end 25a of the acoustic lens unit 25 to be bonded to the protection
unit 26 is enhanced in affinity with the second adhesive by chemical treatment. Here, the method
of chemical treatment for enhancing the affinity of adhesion between the acoustic lens unit 25
and the second adhesive is not particularly limited. For example, known methods such as plasma
treatment, ion beam treatment or treatment with acid are used. Techniques may be applied.
[0043]
The silicone resin constituting the acoustic lens unit 25 is generally a member having a low
affinity for the adhesive and a relatively low adhesive strength, but the affinity for adhesion
between the acoustic lens unit 25 and the second adhesive By performing the enhancing process,
the bonding strength between the acoustic lens unit 25 and the protective unit 26 can be
enhanced, and the peeling between the acoustic lens unit 25 and the protective unit 26 can be
prevented.
[0044]
The ultrasonic wave transmitting / receiving unit 20, the acoustic lens unit 25 and the protection
unit 26 having the configuration described above are held by the holding unit 30.
The holding portion 30 is a member fixed to the distal end portion 10.
[0045]
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As shown in FIG. 4, the holding unit 30 has a recess that accommodates the ultrasonic
transmitting / receiving unit 20, the acoustic lens unit 25, and the protection unit 26. The recess
of the holding portion 30 has a stepped shape in which the one-step opening is narrowed toward
the back and is provided on the outer surface side and the second recess 32 having a wide
opening and the bottom surface 32a of the second recess 32 The first recess 31 is configured
such that the opening is narrower than the second recess 32. The electric wiring connected to
the electroacoustic transducer 21 is a hole 40 penetrating the holding portion 30 and opening in
the first recess 31, and a hole penetrating the tip portion 10 and communicating the curved
portion 11 with the hole 40. It is inserted into the inside of 41. The electroacoustic conversion
unit 21 of the ultrasonic transmission / reception unit 20 is configured to be electrically
connectable to the ultrasonic observation control device 7 via the electric wire inserted into the
hole 40 and the hole 41.
[0046]
The first recess 31 has a shape for holding the ultrasonic wave transmitting / receiving unit 20
such that at least the ultrasonic wave transmitting / receiving surface 20a is exposed from the
opening. As shown in FIG. 3, in a state in which the ultrasonic transmitting / receiving unit 20 is
accommodated in the first recess 31, the outer surface of the acoustic matching layer 22 of the
ultrasonic transmitting / receiving unit 20 and the surface where the first recess 31 is open The
first recess 31 is formed so that a step does not occur between the second recess 32 and the
bottom surface 32 a of the second recess 32.
[0047]
In other words, the ultrasound transmitting and receiving unit 20 is accommodated in the first
recess 31 so that no level difference is generated between the bottom surface 32 a of the second
recess 32 and the ultrasound transmitting and receiving surface 20 a. The ultrasonic transmitting
and receiving unit 20 is fixed in the first recess 31 by an adhesive.
[0048]
Further, the second concave portion 32 has an opening shape in which a pair of protective
portions 26 extending outward beyond the both end portions 22 a of the acoustic matching layer
22 of the ultrasonic wave transmitting / receiving unit 20 is fitted. In a state in which the
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protection portion 26 is fitted in the second recess 32, the inner surface of the protection portion
26 abuts on the bottom surface 32 a of the second recess 32.
[0049]
As described above, in the present embodiment, the protection portion 26 extending outward
from the ultrasonic transmitting and receiving unit 20 is bonded to the outer surface of the
acoustic matching layer 22 of the ultrasonic transmitting and receiving unit 20. Then, a portion
of the protection unit 26 extending to the outside of the ultrasonic wave transmitting / receiving
unit 20 is fitted in the second recess 32 provided in the holding unit 30.
[0050]
Therefore, as shown in FIG. 4, when the ultrasonic transmitting / receiving unit 20 has the
acoustic lens unit 25 and the protection unit 26 bonded in advance, it is accommodated in the
first recess 31 and the second recess 32 of the holding unit 30. The positioning of the ultrasonic
transmitting and receiving unit 20 and the holding unit 30 is performed by fitting the protection
unit 26 and the second recess 32.
[0051]
Since the protection unit 26 is a member adhered on the ultrasonic transmission / reception
surface 20 a (the outer surface of the acoustic matching layer 22), the protection unit 26 and the
second recess 32 are engaged as in the present embodiment. By positioning the sound wave
transmitting / receiving unit 20 and the holding unit 30, the ultrasonic transmitting / receiving
area 20 b can be accurately positioned at a predetermined position with respect to the holding
unit 30.
[0052]
The holding portion 30 and the protection portion 26 fitted in the second recess 32 of the
holding portion 30 are bonded by a second adhesive.
More specifically, the end surface and the inner surface of the protection portion 26 and the side
surface 32 b and the bottom surface 32 a of the second recess 32 are bonded by a second
adhesive.
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[0053]
As described above, the protection portion 26 covers the outer peripheral portion 20 c of the
ultrasonic transmission / reception surface 20 a and is bonded to the outer peripheral portion 20
c and the holding portion 30 by the second adhesive.
More specifically, the protection portion 26 is disposed to cover the outside of the area to which
the end 22 a of the acoustic matching layer 22 and the holding portion 30 are bonded, and the
protection 26 is an end 22 a of the acoustic matching layer 22. And the holder 30.
[0054]
The ultrasonic observation apparatus 1 of the present embodiment described above holds the
ultrasonic wave transmitting / receiving unit 20 that transmits / receives ultrasonic waves on the
ultrasonic wave transmitting / receiving surface 20a, and holds the ultrasonic wave transmitting
/ receiving unit 20 so that the ultrasonic wave transmitting / receiving surface 20a is exposed.
And an acoustic lens unit 25 adhered on the ultrasonic wave transmitting / receiving surface 20a
so as to cover the ultrasonic wave transmitting / receiving area 20b. The ultrasonic observation
apparatus 1 covers the outer peripheral portion 20c not covered by the acoustic lens unit 25 of
the ultrasonic transmission / reception surface 20a, and is disposed to extend in the outer
peripheral direction than the ultrasonic transmission / reception surface 20a. The lens unit 25
further includes a protective unit 26 bonded to the outer peripheral unit 20 c and the holding
unit 30.
[0055]
Then, in the present embodiment, the protective portion 26 is bonded by an adhesive from the
outer peripheral portion 20 c of the ultrasonic transmission / reception surface 20 a to the
bottom surface portion 32 a of the second concave portion 32 of the holding portion 30. That is,
the protection portion 26 is disposed to cover the outside of the area to which the end 22 a of
the acoustic matching layer 22 and the holding portion 30 are adhered, and is adhered to both
the acoustic matching layer 22 and the holding portion 30.
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[0056]
In the ultrasonic observation apparatus of this embodiment having such a configuration, since
the protective member 26 adhered to both sides of the boundary portion between the acoustic
matching layer 22 and the holding portion 30 is disposed, The passage for the liquid to enter
into the portion 30 becomes long, and the waterproofness of the vibrator is further improved.
[0057]
Also, for example, even when the acoustic lens 25 is subjected to an excessive external force
beyond assumed and the lens holding power due to the adhesive between the acoustic matching
layer 22 and the protective portion 26 is reduced, the water tightness inside the holding portion
30 is Since adhesion is maintained between the protective portion 26 and the acoustic matching
layer 22 and the holding portion 30, the liquid can be prevented from entering the holding
portion 30.
[0058]
The adhesion strength per unit area of the second adhesive between the protection portion 26
and the acoustic matching layer 22 and the holding portion 30 is a unit of the first adhesive of
the acoustic lens portion 25 and the acoustic matching layer 22. Higher than adhesive strength
per area.
Therefore, even if an unexpected excessive external force is applied such that the acoustic lens
unit 25 peels off from the acoustic matching layer 22, the protective unit 26 suppresses the
peeling off from the acoustic matching layer 22 and the holding unit 30. can do.
[0059]
As described above, the ultrasonic observation apparatus of the present embodiment can more
reliably prevent the liquid from entering the holding unit 30 holding the ultrasonic transmitting /
receiving unit 20 to which the acoustic lens unit 25 is adhered.
[0060]
Further, in the present embodiment, a silicone-based first adhesive is used to bond the acoustic
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lens unit 25 that transmits ultrasonic waves to the acoustic matching layer 22, and the protection
unit 26 that requires adhesive strength, and the acoustic matching layer An epoxy-based second
adhesive is used for bonding with the adhesive 22 and the holder 30.
The silicone-based first adhesive has a property close to that of the acoustic lens unit 25 and
therefore has a preferable property as an adhesive for bonding the acoustic lens unit 25 on the
ultrasonic transmitting / receiving area 20 b.
On the other hand, since the second epoxy adhesive has high adhesive strength and high
hardness at the time of curing, it is preferable as an adhesive for bonding the protective portion
26 to the acoustic matching layer 22 and the holding portion 30. Have.
[0061]
In the present embodiment, when using a first adhesive having a preferable property in acoustic
characteristics as an adhesive for bonding the acoustic lens unit 25 and the acoustic matching
layer 22, a silicone-based adhesive is used as the first adhesive. There are many. It is generally
said that the adhesive strength of the first adhesive is lower in the adhesive strength than the
epoxy adhesive in terms of the material. Even in the case where such a first adhesive is used to
hold the lens, in the present embodiment, the holding unit 30 is more firmly adhered by the
second adhesive between the protective unit 26 and the acoustic matching layer 22 and the
holding unit 30. The watertightness of the inside is reliably maintained. Thereby, the sensitivity
and the image quality of the ultrasonic tomographic image obtained by the ultrasonic
observation apparatus 1 can be improved.
[0062]
Second Embodiment Next, a second embodiment of the present invention will be described. The
present embodiment differs from the first embodiment only in the configuration of the protection
unit. Therefore, only the difference will be described below, and the same components as those of
the first embodiment are denoted by the same reference numerals, and the description thereof
will be appropriately omitted.
[0063]
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In the first embodiment described above, the protection portion 26 is bonded to the acoustic lens
portion 25, the acoustic matching layer 22 and the holding portion 30 by the second adhesive,
and the boundary portion between the acoustic matching layer 22 and the holding portion 30 is
It has the structure arrange | positioned so that it may cover.
[0064]
On the other hand, as shown in FIG. 5, the protective portion 126 of the present embodiment is
adhered to the acoustic lens portion 25, the acoustic matching layer 22, and the holding portion
30 by the second adhesive as in the first embodiment. Similar to the first embodiment, a part of
the protection part 126 is disposed between the acoustic matching layer 22 and the holding part
30.
[0065]
Specifically, the protection portion 126 of the present embodiment has a convex portion 126 a
extending inward.
The convex portion 126 a is interposed between the end 22 a of the acoustic matching layer 22
and the side surface 32 b of the second concave portion 32 of the holding portion 30.
In addition, that the protection part 126 fits in the 2nd recessed part 32 of the holding |
maintenance part 30 is the same as that of 1st Embodiment.
[0066]
The protection portion 126 is bonded to the acoustic matching layer 22 and the holding portion
30 by a second adhesive. More specifically, the protective portion 126 is formed by the second
adhesive on the outer peripheral portion 20c of the ultrasonic transmission / reception surface
20a, the end 22a of the acoustic matching layer 22, and the side surface 32b and the bottom
surface 32a of the second recess 32. Be glued.
[0067]
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According to the configuration in which the protection portion 126 is provided with the convex
portion 126a extending inward so as to wrap around the outer periphery of the end portion 22a
of the acoustic matching layer 22 as in the present embodiment, protection is achieved more
than in the first embodiment. The bonding area between the portion 126 and the acoustic
matching layer 22 and the bonding area between the protective portion 126 and the holding
portion 30 can be increased. Therefore, according to the present embodiment, the adhesion
strength between the protective portion 126 and the acoustic matching layer 22 and the holding
portion 30 can be further strengthened, and the liquid can be more reliably prevented from
entering the holding portion 30. be able to. The other effects are the same as in the first
embodiment.
[0068]
In addition, the shape of the protection part 126 is not restricted to what is shown in FIG. For
example, as in the first modified example shown in FIG. 6, the convex part 126 a of the
protection part 126 may be shaped so as to wrap around the inside of the acoustic matching
layer 22. In this case, the bonding area between the protection part 126 and the acoustic
matching layer 22 and the bonding area between the protection part 126 and the holding part
30 can be made wider.
[0069]
Further, as in the second modified example shown in FIG. 7, the convex portion 126 a of the
protection portion 126 may have a shape having a flange portion 126 b that protrudes outward
in the outer peripheral direction. In the second modified example, a pressing member 33 is
disposed which is bonded to the holding portion 30 in a state in which the flange portion 126b is
pressed inward. The pressing member 33 is a member that constitutes the outer shape of the
holding unit 30 in a state of being bonded to the holding unit 30.
[0070]
With such a second modification, not only can the bonding area between the protective part 126
and the acoustic matching layer 22 and the bonding area between the protective part 126 and
the holding part 30 be made larger, the protective part 126 By pressing by the pressing member
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33, the protective portion 126 and the acoustic matching layer 22 can be fixed to the holding
portion 30 more firmly. Therefore, according to the second modification, it is possible to more
reliably prevent the liquid from entering the holding unit 30.
[0071]
Further, as in the third modified example shown in FIG. 8, the protective portion 126 may be
shaped so as to cover the end 25 a of the acoustic lens portion 25. The protection unit 126
covers the acoustic lens unit 25 outside the ultrasonic transmission / reception area 20b. In this
case, the end 25 a of the acoustic lens 25 can be protected.
[0072]
With such a third modification, external force can be prevented from being applied to the end 25
a of the acoustic lens 25, and the holding and fixing force with the ultrasonic wave transmission
/ reception surface 20 a of the end of the acoustic lens 25 is further improved. Do. Moreover, the
adhesion area of the protection part 126 and the acoustic lens 25 can be enlarged. Therefore,
according to the third modification, it is possible to more reliably prevent the liquid from
entering the holding unit 30.
[0073]
Third Embodiment Next, a third embodiment of the present invention will be described. In the
following, the description of the same components as those of the first and second embodiments
will be appropriately omitted.
[0074]
The ultrasonic observation apparatus according to the first and second embodiments described
above has an ultrasonic transmission / reception unit that scans an ultrasonic beam in a so-called
electronic convex scan format, but the present invention is not limited to other ultrasonic beams.
The present invention is also applicable to an ultrasonic observation apparatus having a scanning
format.
14-04-2019
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[0075]
In the present embodiment, as an example, the ultrasonic observation apparatus is configured to
include an ultrasonic transmission / reception unit 220 that scans an ultrasonic beam in an
electronic radial scan format.
As shown in FIG. 9, the ultrasonic wave transmitting / receiving unit 220 is held by the holding
unit 230, and is fixed to the distal end unit 10 via the holding unit 230. The ultrasonic
transmission / reception unit 220 is configured to include an electroacoustic conversion unit
221, a backing material 223, and an acoustic matching layer 222.
[0076]
The ultrasonic transmission / reception unit 220 is configured to include an electroacoustic
conversion unit 221 in which a plurality of piezoelectric elements are arranged at predetermined
intervals in the circumferential direction. The plurality of piezoelectric elements constituting the
electroacoustic transducer 221 are arranged to vibrate in the radial direction. In addition,
although the electrical wiring is connected to each of the plurality of piezoelectric elements
constituting the electro-acoustic conversion unit 221, they are omitted in FIG. 9 because they
have a known configuration.
[0077]
A substantially cylindrical backing material 223 is disposed radially inside the electroacoustic
transducer 221. Therefore, the transmission and reception of the ultrasonic waves by the
electroacoustic conversion unit 221 is performed only toward the radially outer side.
[0078]
The acoustic matching layer 222 is a substantially cylindrical member disposed outside the
electroacoustic transducer 221, and transmits ultrasonic waves transmitted and received by the
electroacoustic transducer 21. The acoustic matching layer 222 is a member disposed on the
outermost side of the ultrasonic transmitting and receiving unit 220. That is, the ultrasonic
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transmission / reception surface 220 a of the ultrasonic transmission / reception unit 220 is the
outer peripheral surface of the substantially cylindrical acoustic matching layer 222. In addition,
the ultrasound transmission / reception area 220b substantially matches the shape of the outline
of the electroacoustic transducer 221 projected outward on the ultrasound transmission /
reception surface 220a.
[0079]
An acoustic lens unit 225 is disposed on the ultrasonic wave transmitting / receiving surface 220
a of the ultrasonic wave transmitting / receiving unit 220 having the above-described
configuration. The material which comprises the acoustic lens part 225 is not specifically limited,
The density suitable for acoustic impedance matching with a test object, chemical resistance, etc.
are determined. In the present embodiment, since the subject is a living body such as a human
body, the acoustic lens unit 225 is made of, for example, silicone resin.
[0080]
The acoustic lens portion 225 has an outer shape that covers at least the entire ultrasound
transmission / reception area 220b and fits inside the ultrasound transmission / reception
surface 220a when viewed from the outside in the normal direction of the ultrasound
transmission / reception surface 220a.
[0081]
In the present embodiment, as an example, when viewed from the outer side in the normal
direction of the ultrasonic transmission / reception surface 220a, the acoustic lens portion 225
extends around the ultrasonic transmission / reception area 220b, and the ultrasonic
transmission / reception surface 220a is , Extends around the acoustic lens portion 225.
The acoustic lens portion 225 may have an outer shape substantially coinciding with the
ultrasonic transmission / reception area 220b when viewed from the outside in the normal
direction of the ultrasonic transmission / reception surface 220a.
[0082]
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23
When viewed from the outside in the normal direction of the ultrasonic transmission / reception
surface 220a, a region provided around the ultrasonic transmission / reception surface 220a
which is not covered by the acoustic lens portion 225 is referred to as an outer peripheral
portion 220c. That is, in the present embodiment, both axial end portions 222 a of the acoustic
matching layer 222 extend in the outer peripheral direction than the both end portions 25 a of
the acoustic lens portion 225, and the outer surface of the both end portions 222 a of the
acoustic matching layer 222 is , The outer peripheral portion 220c.
[0083]
The acoustic lens portion 225 is fixed on the ultrasonic transmitting / receiving surface 220 a
which is the outer surface of the acoustic matching layer 222 by a first adhesive. The type of the
first adhesive is not particularly limited, but, for example, a silicone-based adhesive is used.
[0084]
A pair of substantially cylindrical protective portions 226 is disposed at both axial end portions
222 a of the acoustic matching layer 222. The pair of protection portions 226 is in contact with
both end portions 225 a of the acoustic lens portion 225, and when the ultrasonic transmission /
reception surface 220 a is viewed from outside in the normal direction, the protection portions
226 face axially outward with respect to the end 222 a of the acoustic matching layer 222 Out.
Further, a flange-like convex portion 226a protruding radially inward along the end portion 222a
is provided at a portion of the protection portion 226 extending outward in the axial direction
with respect to the end portion 222a of the acoustic matching layer 222. ing.
[0085]
That is, the protection portion 226 covers the outer peripheral portion 220c which is a region
not covered by the acoustic lens portion 225 of the ultrasonic wave transmission / reception
surface 220a, and is disposed to extend axially outward beyond the ultrasonic wave transmission
/ reception surface 220a. It is done.
[0086]
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The protective portion 226 is bonded to the end 225 a of the acoustic lens 225, the outer
periphery 220 c, and the end 222 a of the acoustic matching layer 222 by a second adhesive.
Here, the unit by the second adhesive between the acoustic matching layer 222 and the
protective portion 226 is more than the adhesive strength per unit area between the acoustic
lens portion 225 and the acoustic matching layer 222 by the first adhesive. The material of the
protective portion 225 and the type of the second adhesive are selected such that the adhesive
strength per area is higher.
[0087]
As described above, in the present embodiment, as an example, the acoustic lens portion 225 is
made of silicone resin, and the first adhesive for bonding the acoustic matching layer 222 and
the acoustic lens portion 225 is a silicone adhesive. ing. Therefore, if the protective portion 225
is made of, for example, a so-called engineering plastic such as polyimide, polyamide or
polysulfone, and the second adhesive is an epoxy-based adhesive, the second adhesive may be
attached to the space between the acoustic matching layer 222 and the protective portion 226.
The adhesive strength per unit area by the adhesive is higher than the adhesive strength per unit
area by the first adhesive between the acoustic lens portion 225 and the acoustic matching layer
222.
[0088]
In addition, the surface of the end 225a of the acoustic lens unit 225 to be bonded to the
protection unit 226 is enhanced in affinity with the second adhesive by chemical treatment. Here,
the method of chemical treatment for enhancing the affinity of adhesion between the acoustic
lens portion 225 and the second adhesive is not particularly limited. For example, known
methods such as plasma treatment, ion beam treatment or treatment with an acid are used.
Techniques may be applied.
[0089]
The silicone resin constituting the acoustic lens portion 225 is generally a member having a low
affinity with the adhesive and a relatively low adhesive strength, but the affinity of the adhesive
between the acoustic lens portion 225 and the second adhesive By performing the processing for
enhancing, the bonding strength between the acoustic lens unit 225 and the protective unit 226
14-04-2019
25
can be increased, and the bonding strength between the acoustic lens unit 225 and the protective
unit 226 is further improved.
[0090]
The ultrasonic transmitting and receiving unit 220, the acoustic lens unit 225, and the protection
unit 226 having the configuration described above are held by the holding unit 230.
The holding portion 230 is a member fixed to the distal end portion 10.
[0091]
The holding unit 230 holds the ultrasonic transmitting / receiving unit 220 such that the
ultrasonic transmitting / receiving area 220 b is exposed. The holding portion 230 is provided
with a fitting portion 230 a that fits inside the substantially cylindrical protection portion 226
bonded to the proximal end side of the ultrasonic wave transmitting / receiving unit 220. The
protection part 226 fitted to the fitting part 230a is adhered by the fitting part 230a and the
second adhesive.
[0092]
That is, the ultrasonic transmitting / receiving unit 220 is fixed to the holding unit 230 by
adhering the protecting unit 226 adhered on the proximal side in the axial direction to the
holding unit 230. At this time, the holding portion 230 is fitted to the fitting portion 230a,
whereby the ultrasonic transmitting / receiving portion 220 and the holding portion 230 are
positioned. Therefore, in the present embodiment, the ultrasonic wave transmitting / receiving
area 220b can be accurately positioned at a predetermined position with respect to the holding
unit 230.
[0093]
In addition, the cap portion 240 is fixed to the distal end side of the ultrasonic wave transmitting
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26
/ receiving unit 220. The cap unit 240 is a member for sealing the distal end side of the
ultrasonic transmitting and receiving unit 220. The cap portion 240 is provided with a fitting
portion 240 a that fits inside the substantially cylindrical protective portion 226 bonded to the
distal end side of the ultrasonic wave transmitting / receiving unit 220. The cap portion 240 and
the protective portion 226 are bonded by a second adhesive.
[0094]
By bonding the cap portion 240 to the distal end side of the ultrasonic transmitting and receiving
unit 220, the space surrounded by the cap portion 240, the ultrasonic transmitting and receiving
unit 220, and the holding unit 230 is sealed in a watertight manner.
[0095]
The ultrasonic observation apparatus according to the present embodiment described above
holds the ultrasonic wave transmitting / receiving unit 220 that transmits / receives ultrasonic
waves on the ultrasonic wave transmitting / receiving surface 220a, and holds the ultrasonic
wave transmitting / receiving unit 220 such that the ultrasonic wave transmitting / receiving
surface 220a is exposed. A holding portion 230 and an acoustic lens portion 225 adhered on the
ultrasonic wave transmitting / receiving surface 220a so as to cover the ultrasonic wave
transmitting / receiving area 220b.
The ultrasonic observation apparatus covers the outer peripheral portion 220c not covered by
the acoustic lens portion 225 of the ultrasonic transmission / reception surface 220a, and is
disposed to extend in the outer peripheral direction from the ultrasonic transmission / reception
surface 220a. It further comprises a protective portion 26 bonded to the portion 225, the outer
peripheral portion 220c, and the holding portion 230.
[0096]
Then, in the present embodiment, the protective portion 226 is bonded by an adhesive from the
outer peripheral portion 220c of the ultrasonic transmission / reception surface 220a to the
fitting portion 230a of the holding portion 230. Similarly, in the present embodiment, the
protective portion 226 is bonded by an adhesive from the outer peripheral portion 220c of the
ultrasonic transmission / reception surface 220a to the fitting portion 240a of the cap portion
240.
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[0097]
That is, the protective portion 230 is interposed between the end portion 222 a of the acoustic
matching layer 222 and the holding portion 230 and the cap portion 240 that seal the proximal
end and the distal end of the substantially cylindrical ultrasonic transmission / reception unit
220. It is bonded to both sides in the
[0098]
In such a present embodiment, the water tightness of the internal space surrounded by the
ultrasonic transmitting and receiving unit 220, the holding unit 230, and the cap unit 240, even
when a strong external force beyond the assumption is applied, means that the protection unit
226 and the acoustic The adhesion between the matching layer 222, the holding portion 230
and the cap portion 240 is maintained.
[0099]
The adhesion strength per unit area of the second adhesive between the protective portion 226,
the acoustic matching layer 222, the holding portion 230, and the cap portion 240 is the same as
the first adhesive strength of the acoustic lens portion 225 and the acoustic matching layer 222.
Higher than adhesive strength per unit area by adhesive.
For this reason, fixing of the protection part 226, the acoustic matching layer 222, and the cap
part 240 is performed more firmly than fixing of these parts by the first adhesive for bonding the
acoustic lens part 225.
[0100]
As described above, the ultrasonic observation apparatus of the present embodiment can more
reliably prevent the liquid from entering the holding unit 230 holding the ultrasonic transmitting
/ receiving unit 220 to which the acoustic lens unit 225 is adhered.
[0101]
Further, in the present embodiment, a silicone-based first adhesive is used to bond the acoustic
lens portion 225 transmitting the ultrasonic wave to the acoustic matching layer 222, and the
protective portion 226 requiring adhesive strength, and the acoustic matching layer An epoxy-
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based second adhesive is used to bond the holding portion 230 and the cap portion 240 with
each other.
[0102]
The silicone-based first adhesive has a property close to that of the acoustic lens portion 225,
and thus has a preferable property as an adhesive for bonding the acoustic lens portion 225 on
the ultrasonic transmitting / receiving surface 220a.
On the other hand, since the second epoxy adhesive has high adhesive strength and high
hardness at the time of curing, the adhesive for bonding the protective portion 226, the acoustic
matching layer 222, the holding portion 230, and the cap portion 240 It has desirable properties
as an agent.
[0103]
In this embodiment, even if the adhesive strength is slightly lowered by using the first adhesive
having preferable properties in acoustic characteristics as the adhesive for bonding the acoustic
lens portion 225 and the acoustic matching layer 222, the protective portion 226 is Water
tightness in the ultrasonic transmitting and receiving unit 220 and the holding unit 230 is
reliably maintained by stronger adhesion of the acoustic matching layer 222, the holding unit
230, and the cap unit 240 with the second adhesive.
Thereby, the sensitivity and the image quality of the ultrasonic tomogram obtained by the
ultrasonic observation apparatus can be improved.
[0104]
About the ultrasonic observation apparatus of this embodiment demonstrated above, an example
of the assembly procedure which fixes the ultrasonic transmission / reception part 220 to the
holding part 230 is demonstrated below.
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29
First, as shown in FIG. 10, the protective portion 226 is adhered to the proximal end side of the
ultrasonic wave transmitting / receiving unit 220 using a second adhesive.
[0105]
Next, as shown in FIG. 11, masking is applied to the end 222 a on the tip side of the acoustic
matching layer 222 by, for example, applying a masking tape 241. Here, the area to which the
masking is applied is an area to which the protection section 226 on the tip side is attached later.
The step of applying the masking shown in FIG. 11 may be performed prior to the step shown in
FIG.
[0106]
Next, as shown in FIG. 12, the acoustic lens portion 225 is adhered on the outer peripheral
surface of the acoustic matching layer 222, that is, on the ultrasonic wave transmitting /
receiving surface 220a, using a first adhesive. At this time, since the area to which the distal end
side protection section 226 is adhered by the second adhesive later is masked by the masking
tape 241, the first adhesive does not adhere to this area. The adhesive strength between the
distal end side protective portion 226 and the acoustic matching layer 222 by the second
adhesive by preventing the first adhesive from adhering to the area to which the distal end side
protective portion 226 is attached later. Can be stabilized.
[0107]
Next, the masking tape 241 is peeled off, and the area to which the masking tape 241 has been
attached is cleaned. This is to prevent the adhesive or pressure-sensitive adhesive to which the
masking tape 241 is attached from remaining in the area to which the protective portion 226 on
the tip side is adhered.
[0108]
Next, as shown in FIG. 13, the protection portion 226 is adhered to the distal end side of the
ultrasonic wave transmission / reception unit 220 using a second adhesive. By bonding the pair
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30
of protection portions 226 to the distal end side and the proximal end side of the ultrasonic wave
transmission / reception unit 220, the strength of the substantially cylindrical ultrasonic wave
transmission / reception unit 220 is improved. For this reason, it is possible to prevent the
ultrasonic transmitting and receiving unit 220 from being damaged in the later process, and the
handling of the ultrasonic transmitting and receiving unit 220 becomes easy.
[0109]
Next, as shown in FIG. 14, the proximal protection portion 226 is adhered to the holding portion
230 using a second adhesive. Then, the cap portion 240 is adhered to the distal end side
protective portion 226 using a second adhesive. The ultrasonic transmitting and receiving unit
220 is fixed to the distal end portion 10 of the ultrasonic observation apparatus by assembling in
the procedure described above.
[0110]
Fourth Embodiment Next, a fourth embodiment of the present invention will be described. The
present embodiment differs from the third embodiment only in the shape of the protective
portion. Therefore, only the difference will be described below, and the same components as
those of the third embodiment are denoted by the same reference numerals, and the description
thereof will be appropriately omitted.
[0111]
As shown in FIG. 15, the protection part 226 of the present embodiment has a covering part
226b that covers the acoustic lens part 225 at the outer side than the ultrasonic transmission /
reception area 220b.
[0112]
The end portion of the acoustic lens portion 225 is covered by covering the end portion 225a of
the acoustic lens portion 225 by the covering portion 226b extending from the protection
portion 226 relatively fixed to the acoustic matching layer 222 by the second adhesive. It can
prevent that external force is applied to 225a.
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31
Further, the bonding area between the protective portion 226 and the acoustic lens 225 can be
increased. Therefore, according to the fourth embodiment, as in the third embodiment, it is
possible to prevent the liquid from invading the inside of the ultrasonic wave transmitting /
receiving unit 220 and the holding unit 230, and the end of the acoustic lens unit 225 Can also
be protected.
[0113]
Fifth Embodiment Next, a fifth embodiment of the present invention will be described. The
present embodiment differs from the third embodiment only in the configuration of the
protection unit. Therefore, only the difference will be described below, and the same components
as those of the third embodiment are denoted by the same reference numerals, and the
description thereof will be appropriately omitted.
[0114]
As shown in FIG. 16, in the present embodiment, the protection unit 226 adhered to the proximal
end side of the ultrasonic transmitting / receiving unit 220 is integral with the holding unit 230
and is adhered to the proximal end side of the ultrasonic transmitting / receiving unit 220 The
protector 226 is integral with the cap 240.
[0115]
In the present embodiment, the ultrasonic transmitting and receiving unit 220 is positioned and
fixed relative to the holding unit 230 by being fitted in a substantially cylindrical protection unit
226 integrally formed with the holding unit 230.
Therefore, in the present embodiment, the ultrasonic transmitting and receiving unit 220 can be
fixed at an accurate position with respect to the holding unit 230.
[0116]
Further, in the present embodiment, since the pair of protection portions 226 is integral with the
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32
holding portion 230 and the cap portion 240, the ultrasonic transmitting and receiving portion
220 can be firmly fixed to the holding portion 230. In addition, the number of parts can be
reduced and the cost can be reduced.
[0117]
Sixth Embodiment Next, a sixth embodiment of the present invention will be described. The
present embodiment is mainly different from the third embodiment or the fourth embodiment in
the form of the protective portion. Therefore, the difference between the third embodiment or
the fourth embodiment described above and the present embodiment will be mainly described
below, and the same components as the third embodiment or the fourth embodiment will be
described. The same reference numerals are given, and the description thereof is appropriately
omitted.
[0118]
As shown in FIG. 17, the ultrasonic observation apparatus of the present embodiment is
configured to have an ultrasonic transmission / reception unit 220 that scans an ultrasonic beam
in an electronic radial scan format.
[0119]
The ultrasonic wave transmitting / receiving unit 220 is held by the holding unit 230 and fixed
to the distal end portion 10 via the holding unit 230.
The ultrasonic transmission / reception unit 220 is configured to include an electroacoustic
conversion unit 221, a backing material 223, and an acoustic matching layer 222.
[0120]
The ultrasonic transmission / reception unit 220 is configured to include an electroacoustic
conversion unit 221 in which a plurality of piezoelectric elements 221a are arranged at
predetermined intervals in the circumferential direction. The plurality of piezoelectric elements
221a constituting the electroacoustic transducer 221 are arranged to vibrate in the radial
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33
direction.
[0121]
The ground electrode 221b is formed on the radially outer surface of the piezoelectric element
221a, and the signal electrode 221c is formed on the radially inner surface of the piezoelectric
element 221a. The ground electrode 221 b is an electrode grounded via a configuration
described later. That is, the ground electrode 221b is an electrode which is at the ground
potential which is the reference potential of the ultrasonic observation apparatus. The ground
electrodes 221 b of the plurality of piezoelectric elements 221 a are electrically connected. On
the other hand, the signal electrode 221c is configured to be electrically connectable to the
ultrasonic observation control device 7 through an electrical wiring (not shown), and is an
electrode for inputting and outputting a voltage signal of the piezoelectric element 221a. The
signal electrodes 221c provided to each of the plurality of piezoelectric elements 221a are in a
state where they are electrically insulated.
[0122]
A substantially cylindrical backing material 223 is disposed radially inward of the electroacoustic
transducer 221, that is, outside the surface on which the signal electrode 221c is provided. The
backing material 223 is a member that absorbs the ultrasonic wave emitted inward from the
electroacoustic converter 221 and the ultrasonic wave traveling from the inner side to the
electroacoustic converter 221.
[0123]
Further, a substantially cylindrical acoustic matching layer 222 is disposed on the radially outer
side of the electroacoustic transducer 221, that is, on the outer side of the surface on which the
ground electrode 221b is provided. The acoustic matching layer 222 is a member that transmits
the ultrasonic waves transmitted and received by the electroacoustic transducer 221, and is for
reducing the difference in acoustic impedance between the electroacoustic transducer 221 and
the lens portion 225. The acoustic matching layer 222 may have a configuration in which a
plurality of layers having different densities are stacked.
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[0124]
A film-like or plate-like conductive layer 228 made of a conductive material is disposed on the
inner surface of the substantially cylindrical acoustic matching layer 222. That is, the conductive
layer 228 is provided so as to cover the outer peripheral surface of the electroacoustic
transducer 221. In other words, when the tip end portion 10 is viewed from the outer side in the
radial direction, the electroacoustic transducer 221 is covered by the conductive layer 228. The
conductive layer 228 is in contact with and electrically connected to the ground electrode 221 b
provided on the radially outer surface of all of the plurality of piezoelectric elements 221 a
constituting the electroacoustic transducer 221.
[0125]
The conductive layer 228 may be made of a material having a predetermined conductivity, and
the form is not particularly limited. For example, the conductive layer 228 may be made of a socalled conductive resin in which conductive fillers such as carbon particles and metal particles
are mixed, and is formed by a physical vapor deposition method, a chemical vapor deposition
method, or the like. It may consist of metal thin films, such as copper foil.
[0126]
In addition, an acoustic lens portion 225 is disposed radially outside the ultrasonic wave
transmitting / receiving unit 220. The acoustic lens unit 225 is for focusing the ultrasonic beam
transmitted by the ultrasonic transmission / reception unit 220.
[0127]
A cable housing portion 231 is disposed radially inward of the ultrasonic transmission /
reception unit 220. The cable housing portion 231 is a hollow substantially cylindrical member
whose base end is fixed to the holding portion 230, for example. In the cable housing portion
231, a plurality of electrical wirings (not shown) electrically connected to ground wirings 232
and 233 described later and the signal electrode 221c of the piezoelectric element 221a are
bundled and inserted.
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[0128]
Flange portions 231a and 231b extending radially outward in a disc shape are provided at
positions on the distal end side of the electroacoustic conversion portion 221 and positions on
the proximal end side of the electroacoustic conversion portion 221 of the cable housing portion
231. It is formed.
[0129]
The proximal flange portion 231 b formed in the cable housing portion 231 has an outer
diameter in contact with the conductive layer 228 provided on the inner surface of the acoustic
matching layer 222.
A film-like or plate-like conductive layer 229 made of a conductive material is disposed on the
surface facing the base end side of the flange portion 231b and on the outer peripheral surface.
That is, the conductive layer 229 has an outer diameter substantially the same as the outer
diameter of the electroacoustic transducer 221. Therefore, when the distal end portion 10 is
viewed from the proximal end side, the electroacoustic transducer 221 is covered by the
conductive layer 229.
[0130]
The conductive layer 229 is electrically connected to a conductive layer 228 provided to cover
the outer circumferential surface of the electroacoustic transducer 221. The conductive layer
229 is electrically connected to the ground wiring 233 inserted into the cable housing portion
231. The conductive layer 229 is grounded via the ground wiring 233. Accordingly, the
conductive layer 228 electrically connected to the conductive layer 229 and the ground
electrode 221 b are also grounded via the ground wiring 233.
[0131]
The conductive layer 229 may be made of a material having predetermined conductivity, and the
form is not particularly limited. For example, the conductive layer 229 may be made of a socalled conductive resin mixed with a conductive filler such as carbon particles or metal particles,
14-04-2019
36
or a metal such as copper foil formed by a vapor deposition method or the like. It may be made
of a thin film. The conductive layer 229 may be a disk-shaped metal plate, and may be fixed to
the cable housing portion 231 by an adhesive or embedding at the time of molding of the cable
housing portion 231.
[0132]
In addition, a groove-shaped balloon locking portion 230b recessed along the circumferential
direction is provided on the outer peripheral portion on the proximal end side of the ultrasonic
transmitting / receiving unit 220 of the holding unit 230. The balloon locking portion 230 b is
for locking a non-illustrated ultrasonic balloon covering the periphery of the ultrasonic
transmission / reception unit 220 together with a balloon locking unit 240 b described later
provided on the tip side of the ultrasonic transmission / reception unit 220. It is a site. The
ultrasound balloon used in the ultrasound observation apparatus having the ultrasound
transmission / reception unit 220 of the radial scan type as in this embodiment intervenes an
ultrasound transmission medium such as liquid between the acoustic lens 225 and the subject.
And are well known.
[0133]
In the ultrasonic observation apparatus having the ultrasonic transmission / reception unit 220
of the electronic radial scan type configured as described above, a pair of protection units 226 is
disposed at both axial end portions 222 a of the acoustic matching layer 222.
[0134]
As an example, the protection part 226 of this embodiment has a covering part 226b which
covers the distal end and the base end of the acoustic lens 225 on the outer side than the
ultrasonic transmission / reception area 220b as in the fourth embodiment. .
As in the third embodiment, the protective portion 226 may not have a covering portion.
[0135]
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37
A cap portion 240 is fixed to the front end side of the protection portion 226 provided on the
front end side of the acoustic lens 225. The cap unit 240 is a member for sealing the distal end
side of the ultrasonic transmitting and receiving unit 220 in a watertight manner. The outer
peripheral portion of the cap portion 240 is provided with a groove-shaped balloon locking
portion 240 b recessed along the circumferential direction. The balloon locking unit 240 b locks
the ultrasonic balloon (not shown) covering the periphery of the ultrasonic transmitting /
receiving unit 220 together with the above-mentioned balloon locking unit 230 b provided on
the proximal side of the ultrasonic transmitting / receiving unit 220. Part of
[0136]
In the third embodiment or the fourth embodiment described above, the protection portion 226
provided on the tip end side of the acoustic lens 225 and the cap portion 240 provided on the tip
end side of the protection portion 226 are fixed by adhesion. ing. In the present embodiment, the
mode in which the protective portion 226 and the cap portion 240 are fixed is different from the
third embodiment or the fourth embodiment.
[0137]
In the present embodiment, the protection portion 226 and the cap portion 240 are coupled by
mechanical engagement in addition to bonding by adhesion. The form of mechanical engagement
between the protective portion 226 and the cap portion 240 is not particularly limited, but in the
present embodiment, as an example, as shown in FIGS. 17 and 18, the protective portion 226 and
the cap portion 240. And are coupled by a screw structure.
[0138]
The protective portion 226 provided on the front end side of the acoustic lens 225 is provided
with a plate-like disc-like portion 226 c extending inward in the radial direction. A through hole
226g having a predetermined inner diameter is formed substantially at the center of the disc-like
portion 226c. That is, when the tip end portion 10 is viewed from the tip end side, the disc-like
portion 226 c is an annular portion whose outer diameter is the outer diameter of the protection
portion 226 and whose inner diameter is a predetermined inner diameter.
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[0139]
Here, the inner diameter of the disk-shaped portion 226 c is set to be substantially the same as
the inner diameter of the substantially cylindrical electroacoustic transducer 221 or smaller than
the inner diameter of the electroacoustic transducer 221. In the present embodiment, as an
example, the inner diameter of the disk-like portion 226 c is smaller than the inner diameter of
the cylindrical cable housing portion 231 disposed inside the electroacoustic transducer 221.
[0140]
A male screw portion 226 f is provided at the center of the surface on the tip side of the disk-like
portion 226 c so as to protrude toward the tip side. The through hole 226g penetrates the male
screw portion 226f.
[0141]
On the other hand, on the surface on the base end side of the cap portion 240, a female screw
portion 240f screwed to the male screw portion 226f is formed. By screwing the female screw
portion 240f to the male screw portion 226f until the most proximal seating surface 240d of the
cap portion 240 abuts on the distal surface of the disc portion 226c, the protective portion 226
and the cap portion And 240 are coupled by mechanical engagement.
[0142]
In addition, the relationship of arrangement | positioning of the male screw and female screw for
connecting the protection part 226 and the cap part 240 is not restricted to this embodiment, A
female screw part is provided in the protection part 226, It may be a form in which a male screw
part is provided.
[0143]
In the vicinity of the outer edge portion of the surface on the tip end side of the disk-like portion
226, a fitting portion 226d that protrudes toward the tip end is formed.
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The fitting portion 226 d is an annular convex portion whose center is substantially the same as
that of the male screw portion 226 f. The inner diameter of the fitting portion 226 d is set to be
substantially the same as the outer diameter of the electroacoustic transducer 221 or larger than
the outer diameter of the electroacoustic transducer 221 when viewed from the distal end side.
[0144]
On the other hand, on the seating surface 240d of the cap portion 240, a fitting portion 240c is
formed, which is a groove portion into which the fitting portion 226d provided in the disk-like
portion 226 fits. The fitting portion 240 c is an annular recess having a center substantially
identical to that of the female screw portion 240 f.
[0145]
By screwing the female screw portion 240f to the male screw portion 226f until the seating
surface 240d of the cap portion 240 abuts on the tip side surface of the disk portion 226c, the
convex fitting portion 226d of the protective portion 226 And the concave fitting portion 240 c
of the cap portion 240 are fitted. The fitting of the fitting portion 226 d of the protection portion
226 and the fitting portion 240 c of the cap portion 240 positions the cap portion 240 in the
radial direction with respect to the protection portion 226.
[0146]
Further, the fitting of the convex fitting portion 226 d of the protective portion 226 and the
concave fitting portion 240 c of the cap portion 240 achieves watertightness between the
protective portion 226 and the cap portion 240. A gasket, an O-ring, or the like may be disposed
between the fitting portion 226 d and the fitting portion 240 c.
[0147]
Note that the positioning between the protective portion 226 and the cap portion 240 in the
radial direction can be reliably performed by the fitting portion 226 d and the fitting portion 240
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c provided on both of them, between the female screw portion 240 f and the male screw portion
226 f A gap is defined. In other words, in order to prevent the fitting of the fitting portion 226d
and the fitting portion 240c and the fitting of the female screw portion 240f and the male screw
portion 226f from becoming a so-called double fitting, the female screw portion 240f and the
male The fitting play of the screw portion 226f is increased.
[0148]
In the present embodiment, the fitting portion 226 d having a convex shape is provided in the
protective portion 226 and the fitting portion 240 c having a concave shape is provided in the
cap portion 240, but the fitting portion provided in the protective portion 226 and the cap
portion 240 The relationship of the unevenness may be reversed, and the fitting portion of the
protective portion 226 may be concave and the fitting portion of the cap 240 may be convex.
[0149]
As described above, in the present embodiment, the protection portion 226 and the cap portion
240 are firmly coupled by the screw structure and the adhesion.
And by fitting the fitting part 226d and the fitting part 240c provided in the protection part 226
and the cap part 240, both positioning and ensuring of watertightness between both are
implement | achieved. This embodiment is different from the third embodiment or the fourth
embodiment described above in that the protective portion 226 and the cap portion 240 are
fixed only by the adhesive. It is possible to fix the cap portion 240 more firmly in the correct
positional relationship. Further, by fixing the protective portion 226 and the cap portion 240 by
the adhesive applied to the fitting portion and the screw portion, the protective portion 226 and
the cap portion 240 are firmly fixed, and the water tightness between the both is secured. Can be
raised.
[0150]
Further, in the present embodiment, the film-like or plate-like conductive layer 227 made of a
conductive material is disposed on the surface on the tip side of the discoid part 226 c of the
protection part 226. The conductive layer 227 has a diameter substantially the same as the outer
diameter of the electro-acoustic transducer 221 or the outer diameter of the electro-acoustic
transducer 221 when viewed from the tip end side and is substantially the same as the outer
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41
diameter of the electro-acoustic transducer 221 In the area inside the large diameter, it is
disposed to cover the protection portion 226.
[0151]
Specifically, in the present embodiment, the conductive layer 227 is disposed so as to cover the
inner surface on the tip end side of the through hole 226g and the tip surface and the outer
peripheral surface (screw forming portion) of the male screw portion 226f. Furthermore, it is
disposed so as to cover the surface on the tip end side of the disc-like portion 226c from the
male screw portion 226f to the radially outer side and the inner wall surface of the fitting portion
226d. Therefore, when the tip portion 10 is viewed from the tip side, the electroacoustic
transducer 221 is covered with the conductive layer 227. In addition, the conductive layer 227 is
not exposed to the outside, and is provided in a watertight area between the protective portion
226 and the cap portion 240.
[0152]
The conductive layer 227 is electrically connected to the ground wiring 232 inserted into the
cable housing portion 231. Specifically, the ground wiring 233 which is inserted into the cable
housing portion 231 and the through hole 226g and extends to the tip end side of the protection
portion 226 is soldered at a portion covering the tip end surface of the male screw portion 226f
of the conductive layer 227. It is connected by the attachment and the conductive adhesive etc.
Therefore, the conductive layer 227 is grounded via the ground wiring 232.
[0153]
The conductive layer 227 may be made of a material having a predetermined conductivity, and
the form is not particularly limited. For example, the conductive layer 227 may be made of a socalled conductive resin in which conductive fillers such as carbon particles and metal particles
are mixed, and is formed by a physical vapor deposition method, a chemical vapor deposition
method, or the like. It may consist of metal thin films, such as copper foil. When the conductive
layer 227 is made of a metal, the conductive layer 227 is made of, for example, a pure metal such
as gold, silver, copper, nickel, tin, or aluminum, or an alloy containing these.
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[0154]
The conductive layer 227 may be a metal plate, and may be fixed to the protective portion 226
by an adhesive or embedding at the time of molding. When the conductive layer 227 is a metal
plate, the male screw portion 226f may be formed in a metal plate.
[0155]
In the present embodiment described above, the tip end side, the radial outer side, and the base
end side of the signal electrode 221 c of the electroacoustic transducer 221 are covered with the
conductive layers 227, 228, and 229. As described above, in the present embodiment, a so-called
protective grounding structure is realized in which the conductive layers 227, 228 and 229
which are earthed surround the periphery of the signal electrode 221c which is a portion to
which an electric signal is applied. The protective earthing structure exposes the conductive
layers 227, 228, and 229 to the outside even if a sharp metal piece such as a scalpel sticks to the
tip 10 due to a strong force in use. Leakage can be prevented.
[0156]
The present embodiment described above has the same effects as the third embodiment or the
fourth embodiment, in addition to the effects described above.
[0157]
In the present embodiment described above, a screw structure is used as the structure for
mechanically coupling the protection portion 226 and the cap portion 240. However, the
structure of mechanical coupling between the protection portion 226 and the cap portion 240 Is
not limited to this embodiment.
A modification of the mechanical connection between the protection portion 226 and the cap
portion 240 will be described below.
[0158]
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In this modification, as shown in FIG. 19, an engagement claw extending outward in the form of a
hook in the radial direction at the tip of the shaft portion 226i that protrudes from the center of
the disk shaped portion 226c of the protection portion 226 toward the tip A portion 226k is
formed. On the other hand, in the surface on the base end side of the cap portion 240, an
engagement hole portion 240g into which the engagement claw portion 226k and the shaft
portion 226i can be inserted is formed.
[0159]
As shown in FIG. 20 and FIG. 21, the inner diameter of the engagement hole 240 g is expanded
at the back. By relatively rotating the protection portion 226 and the cap portion 240 around the
shaft portion 226i in a state where the engagement claw portion 226k and the shaft portion 226i
are inserted into the engagement hole portion 240g, the engagement claw portion 226k Also, the
shaft portion 226i does not come out of the engagement hole portion 240g, and the protection
portion 226 and the cap portion 240 are mechanically coupled.
[0160]
Seventh Embodiment Next, a seventh embodiment of the present invention will be described. The
present embodiment is different from the sixth embodiment in the form of the protection unit.
Therefore, in the following, the difference between the above-described sixth embodiment and
the present embodiment will be mainly described, and the same components as the sixth
embodiment are denoted by the same reference numerals, and the description thereof will be
appropriately described. It shall be omitted.
[0161]
As shown in FIGS. 22 and 23, the disk-shaped portion 226c of the protection portion 226 of the
present embodiment is divided into two, an outer disk-shaped portion 226ca and an inner diskshaped portion 226cb, and the outer disk The part 226ca and the inner disc part 226cb are fixed
by an adhesive 234.
[0162]
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Specifically, a member having the same function as that of the disk-shaped portion 226c in the
sixth embodiment shown in FIG. 17 is divided into two, substantially integrated with the covering
portion 226b, and a fitting portion 226d is formed. It is comprised by the annular | circular
shaped outer disk-like part 226ca and inner disk-like part 226cb arrange | positioned inside the
outer disk-like part 226ca, and in which the external thread part 226f was formed.
In the vicinity of the outer edge portion of the inner disk-shaped portion 226ca, a plurality of
through holes 226h filled with the adhesive 234 are formed in the circumferential direction.
[0163]
In the present embodiment, a method for assembling the distal end side protection portion 226
to the distal end portion 10 will be described below. First, as shown in FIG. 24, the outer disc-like
portion 226ca is fixed to the distal end side of the ultrasonic wave transmitting / receiving unit
220 with an adhesive. Then, the adhesive 234 is applied to the inner peripheral surface of the
outer disk-shaped portion 226ca. In the present embodiment, the adhesive 234 is applied also to
the tip end surface of the flange portion 231 a on the tip end side of the cable housing portion
231.
[0164]
Then, as shown in FIG. 25, the inner disk-shaped portion 226 cb is disposed at a predetermined
position of the outer disk-shaped portion 226 ca by the positioning jig 235, and the adhesive
234 is cured. Specifically, the positioning jig 235 is a female screw portion 235a engaged with
the male screw portion 226f of the inner disk portion 226cb, and an axis of the inner disk
portion 226cb in contact with the inner disk portion 226cb. It has a butt portion 235b for
positioning in the direction, and a concave fitting portion 235c which fits with the fitting portion
226d of the outer disc-like portion 226ca.
[0165]
That is, the positioning jig 235 is positioned at a predetermined position with respect to the outer
disc-like portion 226ca by fitting the fitting portion 235c to the fitting portion 226d. In addition,
the positioning jig 235 brings the inner disk-shaped portion 226cb into a predetermined position
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by screwing the female screw portion 235a and the male screw portion 226f until the inner diskshaped portion 226cb abuts on the abutment portion 235b. It is configured to be able to be held.
[0166]
By holding the inner disk portion 226cb at a predetermined position of the outer disk portion
226ca by such a positioning jig 235, the inner disk portion 226ca and the tip end surface of the
flange portion 231a are applied. The adhesive 234 used is filled between the outer disk portion
226ca and the inner disk portion 226cb and in the through hole 226h.
[0167]
After curing of the adhesive 234, the protection jig 226 on the tip end side is assembled to the
tip end portion 10 by removing the positioning jig 235.
After removing the positioning jig 235, the tip of the ground wire 232 is fixed to the conductive
layer 227 by soldering. Then, as in the sixth embodiment, the cap portion 240 is coupled to the
protective portion 226 by screwing and bonding.
[0168]
The present embodiment described above has the same effects as the sixth embodiment.
[0169]
The present invention is not limited to the above-described embodiment, and can be
appropriately modified without departing from the scope or spirit of the invention as can be read
from the claims and the entire specification, and an ultrasonic wave accompanied by such a
modification. Observation devices are also within the scope of the present invention.
[0170]
As described above, the present invention is suitable for an ultrasonic observation apparatus
such as an ultrasonic endoscope having an ultrasonic transmission / reception unit.
[0171]
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Reference Signs List 1 ultrasonic observation apparatus, 2 insertion parts, 3 operation parts, 4
universal cords, 4a endoscope connector, 5 electric cables, 5a electric connectors, 6 ultrasonic
cables, 6a ultrasonic connectors, 7 ultrasonic observation control devices, 8 Image display device,
10 tip portion, 11 curved portion, 12 flexible tube portion, 13 angle operation knob, 20
ultrasonic wave transmitting / receiving portion, 20a ultrasonic wave transmitting / receiving
surface, 20b ultrasonic wave transmitting / receiving area, 20c outer peripheral portion, 21
electroacoustic transducer 22 acoustic matching layer 22a end 23 (of acoustic matching layer)
backing material 25 acoustic lens portion 25a end of acoustic lens 26 protective portion 30
holding portion 31 first concave portion 32 second concave portion , 32a (second recess) bottom
surface, 32b (second recess) side surface, 33 pressing member, 40 holes, 41 holes, 126
protective portions, 126a convex portions, 126 Flange part, 220 ultrasonic transmission /
reception part, 220a ultrasonic transmission / reception surface, 220b ultrasonic transmission /
reception area, 220c outer peripheral part, 221 electroacoustic conversion part, 221a
piezoelectric element, 221b ground electrode, 222 acoustic matching layer, 222a end, 223
backing Material, 225 acoustic lens portion, 225a end portion, 226 protection portion, 226b
covering portion, 226c disk portion, 226d fitting portion, 226f male screw portion, 226g
through hole, 226h through hole, 226i shaft portion 226k engaging claw Section, 227
conductive layer, 228 conductive layer, 229 conductive layer, 230 holding portion, 230a fitting
portion, 230b balloon locking portion, 231 cable housing portion, 231a flange portion, 231b
flange portion, 232 ground wiring, 233 Ground wiring, 234 adhesive, 235 positioning jig, 235
Female screw section, 235b butt section, 235c fitting section, 240 cap section, 240a fitting
section, 240b balloon locking section, 240c fitting section, 240d seating surface, 240e coupling
section, 240f female thread section, 240g engagement Hole, 241 masking tape.
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