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DESCRIPTION JP2015144788
PROBLEM TO BE SOLVED: To provide an ultrasonic vibration device which can be manufactured
with a simple structure at low cost, improve electric wiring strength to a piezoelectric element
unit, and use an ultrasonic wave generating element with the original characteristics of design.
Offer. SOLUTION: An ultrasonic vibration device 2 comprises two mass members 42 and 43
disposed so as to sandwich a laminated vibrator 41 in which a plurality of piezoelectric members
61 and a plurality of electrodes 62 and 63 are laminated; The cable sheaths 37b and 38b of the
two wiring cables 37 and 38 are longitudinal axes in accordance with the positions of the two
wiring cables 37 and 38 for applying or returning and the plurality of electrodes 62 and 63 on
the positive side or the negative side. A plurality of core wire exposed portions 37c, 38c formed
to expose the cable core wires 37a, 38a by stripping at a plurality of locations along the
direction, and exposing the exposed cable core wires 37a, 38a to the plurality of electrodes 62,
63 And connecting portions 55 and 56 for connecting and fixing. [Selected figure] Figure 3
Ultrasonic vibration device and ultrasonic medical device
[0001]
The present invention relates to an ultrasonic vibration device for exciting ultrasonic vibration,
and an ultrasonic medical apparatus provided with the ultrasonic vibration device.
[0002]
In recent years, ultrasonic medical devices include, for example, ultrasonic treatment instruments
used for hemostasis / incision in laparoscopic surgery and utilizing friction / heat generation due
to ultrasonic vibration. An ultrasonic transducer is provided to generate sonic vibration.
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[0003]
For example, as disclosed in Patent Document 1, such an ultrasonic transducer is formed of a
piezoelectric element unit in which piezoelectric elements are stacked using a conductive
adhesive, in a metal cylinder threaded at both ends. It is known to insert and to fix by screwing in
a metal member from the both ends.
[0004]
The ultrasonic transducer disclosed in Patent Document 1 does not require a hole for passing a
bolt as compared with a conventional bolt-clamped Langevin-type transducer by forming the
piezoelectric transducer in a laminated structure by adhesion. The effective volume of the
vibrator can be efficiently increased.
[0005]
JP, 2010-34817, A
[0006]
By the way, the conventional ultrasonic transducer disclosed in Patent Document 1 differs in that
terminal plates of the same polarity in the piezoelectric element unit are electrically joined with
each other by the conductive film or the conductive layer of the conductive paste so as not to
cause a short circuit. An insulating film or an insulating layer of insulating paste is provided to
insulate the conductive layer from the terminal plate of the pole.
The lead wires of the conductive layer are electrically connected by solder or the like.
[0007]
However, in the conventional ultrasonic transducer, breakage of the conductive layer and the
insulating layer and an electrical contact failure of the connection portion between the
conductive layer and the lead wire occur when the ultrasonic transducer is incorporated in an
ultrasonic medical device and used in a high amplitude region Possibility is considered, the range
of usable amplitude is limited, and as a result, the original characteristic as an ultrasonic wave
generation element may not be obtained, or it may not be able to drive as a resonator.
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[0008]
Furthermore, in the conventional ultrasonic transducer, since the conductive film or the
conductive layer of the conductive paste and the insulating film or the insulating layer of the
insulating paste are provided, not only the assembly process becomes complicated but also it can
not be manufactured inexpensively. was there.
[0009]
Therefore, the present invention has been made in view of the above circumstances, and can be
manufactured inexpensively with a simple structure, improve the electrical wiring strength to the
piezoelectric element unit, and design an ultrasonic wave generating element. An object of the
present invention is to provide an ultrasonic vibration device and an ultrasonic medical device
which can be used in the characteristics.
[0010]
An ultrasonic vibration device according to one aspect of the present invention includes a
laminated vibrator in which a plurality of piezoelectric members and a plurality of electrodes are
laminated, two mass members disposed to sandwich the laminated vibrator, and the laminated
vibration. The cable sheaths of the two distribution cables are arranged at a plurality of positions
along the longitudinal axis direction according to the positions of the two distribution cables
which apply or return electric power to the child and the plurality of electrodes on the positive
side or the negative side A connection for electrically connecting and fixing a plurality of core
wire exposed portions formed to expose the cable core wires and the cable core wires exposed by
the plurality of core wire exposed portions to the plurality of electrodes Have a department.
[0011]
The ultrasonic medical device according to one aspect of the present invention is a laminated
vibrator in which a plurality of piezoelectric members and a plurality of electrodes are laminated,
two mass materials disposed so as to sandwich the laminated vibrator, and The cable sheaths of
the two distribution cables are aligned along the longitudinal axis direction according to the
positions of the two distribution cables that apply or return power to the laminated vibrator and
the plurality of electrodes on the positive side or the negative side A plurality of core wire
exposed portions formed so as to peel away a plurality of portions to expose the cable core wire,
and the cable core wires exposed by the plurality of core wire exposed portions are electrically
connected and fixed to the plurality of electrodes And an ultrasonic vibration device including the
connection portion, and a probe tip portion for transmitting the ultrasonic vibration generated by
the ultrasonic vibration device and treating a living tissue.
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[0012]
According to the present invention, an ultrasonic wave can be manufactured with a simple
structure and at low cost, and the electrical wiring strength to the piezoelectric element unit can
be improved, and the ultrasonic wave generating element can be used with the original
characteristics of the design. Vibration devices and ultrasound medical devices can be provided.
[0013]
The sectional view showing the whole composition of the ultrasonic medical equipment
concerning one mode of the present invention. The figure showing the outline composition of the
whole vibrator unit. The perspective view showing the composition of an ultrasonic vibrator. The
same. Side view showing configuration Same perspective view showing the configuration of two
wiring cables leading out from the tip of the electric cable Same perspective view showing the
configuration of two wiring cables from which the cable sheath is peeled off An exploded
perspective view showing a state in which two wiring cables are electrically connected to the
vibrator. A perspective view showing a state in which the wiring cable on the negative side is
electrically connected to one side of the laminated vibrator of the ultrasonic vibrator. Similarly, a
perspective view showing a state in which the wiring cable on the positive side is electrically
connected to one side surface of the laminated vibrator of the ultrasonic vibrator, according to
one aspect of the first modification One side of the laminated transducer of the ultrasonic
transducer Fig. 10 is a side view showing a state where the wiring cable is electrically connected
to one side of the laminated vibrator of the ultrasonic vibrator according to another aspect
different from Fig. 10 of the first modification example. Is a side view showing a state in which
the cable sheath is connected, and a perspective view showing a configuration of a wiring cable
in which the cable sheath has been peeled according to the second modification; and the cable
sheath is peeled according to the second modification. 13 is a plan view showing the
configuration of the wiring cable according to the second modification, and FIG. 13 is a plan view
showing the configuration of the wiring cable with the cable sheath peeled off viewed from a
direction different from FIG. 13 is a cross-sectional view of the wiring cable taken along the line
XV-XV in FIG. 13, according to the second modification, in which two wiring cables are
electrically connected to one side surface of the laminated vibrator of the ultrasonic vibrator.
Cross section showing
[0014]
Hereinafter, the present invention will be described using the drawings.
In the following description, the drawings based on the respective embodiments are schematic,
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and the relationship between the thickness and the width of each portion, the ratio of the
thickness of each portion, and the like are different from the actual ones. It should be noted that
there may be parts where the relationships and proportions of dimensions differ from one
another among the drawings.
[0015]
First, an embodiment of an ultrasonic medical apparatus provided with an ultrasonic vibration
device for exciting ultrasonic vibration according to one aspect of the present invention will be
described below based on the drawings.
FIG. 1 is a cross-sectional view showing the entire configuration of the ultrasonic medical device,
FIG. 2 is a view showing the general configuration of the transducer unit, FIG. 3 is a perspective
view showing the configuration of the ultrasonic transducer FIG. 5 is a perspective view showing
the configuration of two wiring cables drawn out from the end of the electric cable; FIG. 6 is a
perspective view showing the configuration of two wiring cables from which the cable sheath has
been peeled off; FIG. 7 is an exploded perspective view showing a state in which two wiring
cables are electrically connected to the laminated vibrator of the ultrasonic transducer, and FIG. 8
is a wiring cable on the negative side on one side of the laminated vibrator of the ultrasonic
vibrator. FIG. 9 is a perspective view showing a state in which the wiring cable on the positive
side is electrically connected to one side surface of the laminated vibrator of the ultrasonic
transducer, and FIG. According to one aspect of the modified example 1, the ultrasonic vibration
of the wiring cable in the form of a wavy line FIG. 11 relates to another aspect different from FIG.
10 of the first modification example, showing a state where the wiring cable is electrically
connected to one side surface of the laminated vibrator of FIG. FIG. 12 is a side view showing a
state of being electrically connected to one side of the laminated vibrator of FIG. FIG. 14 is a plan
view showing the configuration of the wiring cable with the cable sheath peeled off according to
the second modification, and FIG. 14 is a wiring cable with the cable sheath peeled away viewed
from a direction different from FIG. FIG. 15 is a plan view showing the configuration of the
second modification, FIG. 15 is a cross-sectional view of the distribution cable taken along line
XV-XV in FIG. Electrically connected to one side of multilayer vibrator of ultrasonic transducer
And is a cross-sectional view illustrating a state.
[0016]
(Ultrasonic Medical Device) The ultrasonic medical device 1 shown in FIG. 1 mainly uses a
transducer unit 3 having an ultrasonic transducer 2 for generating ultrasonic vibration, and
coagulation / disappearance of the affected area using the ultrasonic vibration. A handle unit 4 is
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provided to perform an incision procedure.
[0017]
The handle unit 4 includes an operation portion 5, an insertion sheath portion 8 composed of a
long outer tube 7, and a distal end treatment portion 30.
The proximal end portion of the insertion sheath portion 8 is attached to the operation portion 5
so as to be rotatable around the axis.
[0018]
The distal end treatment unit 30 is provided at the distal end of the insertion sheath unit 8.
The operation unit 5 of the handle unit 4 includes an operation unit main body 9, a fixed handle
10, a movable handle 11, and a rotation knob 12.
The operation unit main body 9 is integrally formed with the fixed handle 10.
[0019]
A slit 13 through which the movable handle 11 is inserted is formed on the back side of the
connecting portion between the operation portion main body 9 and the fixed handle 10.
The upper portion of the movable handle 11 extends inside the operation portion main body 9
through the slit 13.
[0020]
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A handle stopper 14 is fixed to the lower end of the slit 13.
The movable handle 11 is rotatably attached to the operation unit main body 9 via a handle
support shaft 15.
The movable handle 11 is designed to be opened and closed with respect to the fixed handle 10
as the movable handle 11 pivots about the handle support shaft 15.
[0021]
A substantially U-shaped connecting arm 16 is provided at the upper end of the movable handle
11.
Further, the insertion sheath portion 8 has an outer tube 7 and an operation pipe 17 axially
movably inserted into the outer tube 7.
[0022]
A large diameter portion 18 larger in diameter than the distal end portion is formed at the
proximal end portion of the sheath tube 7.
The rotary knob 12 is mounted around the large diameter portion 18.
[0023]
A ring-shaped slider 20 is provided on the outer peripheral surface of the operation pipe 19 so as
to be movable along the axial direction.
A fixing ring 22 is disposed behind the slider 20 via a coil spring (elastic member) 21.
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[0024]
Furthermore, the proximal end of the grip portion 23 is rotatably connected to the distal end of
the operation pipe 19 via an action pin.
The grasping portion 23 constitutes a treatment portion of the ultrasonic medical device 1
together with the distal end portion 31 of the probe 6. Then, when the operation pipe 19 moves
in the axial direction, the gripping portion 23 is pushed and pulled in the front-rear direction via
the action pin.
[0025]
At this time, when the operation pipe 19 is moved to the hand side, the grip 23 is pivoted
counterclockwise around the fulcrum pin via the action pin.
[0026]
As a result, the gripping portion 23 pivots in a direction (close direction) in which the tip end
portion 31 of the probe 6 approaches.
At this time, the living tissue can be gripped between the one-sided grip type gripping portion 23
and the tip end portion 31 of the probe 6.
[0027]
With the living tissue thus held, power is supplied from the ultrasonic power source to the
ultrasonic transducer 2 to vibrate the ultrasonic transducer 2. This ultrasonic vibration is
transmitted to the tip 31 of the probe 6. Then, coagulation / dissection treatment of the living
tissue held between the holding portion 23 and the distal end portion 31 of the probe 6 is
performed using the ultrasonic vibration.
[0028]
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(Silver Unit) Here, the vibrator unit 3 will be described. As shown in FIG. 2, the transducer unit 3
integrally assembles the ultrasonic transducer 2 and a probe 6 which is a rod-like vibration
transmitting member for transmitting ultrasonic vibration generated by the ultrasonic transducer
2. It is
[0029]
In the ultrasonic transducer 2, a horn 32 for amplifying the amplitude of the ultrasonic
transducer is continuously provided. The horn 32 is formed of stainless steel, duralumin, or a
titanium alloy such as 64Ti (Ti-6Al-4V).
[0030]
The horn 32 is formed in a conical shape in which the outer diameter becomes smaller toward
the distal end side, and the outward flange 33 is formed on the proximal end outer peripheral
portion. Here, the shape of the horn 32 is not limited to the conical shape, but is an exponential
shape in which the outer diameter decreases exponentially as it goes to the tip side, or a step
shape that gradually narrows as it goes to the tip side. May be
[0031]
The probe 6 has a probe main body 34 formed of a titanium alloy such as 64Ti (Ti-6Al-4V). On
the proximal end side of the probe main body 34, the ultrasonic transducer 2 connected to the
above-described horn 32 is disposed.
[0032]
Thus, a transducer unit 3 in which the probe 6 and the ultrasonic transducer 2 are integrated is
formed. In the probe 6, the probe main body 34 and the horn 32 are screwed, and the probe
main body 34 and the horn 32 are joined.
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[0033]
The ultrasonic vibration generated by the ultrasonic transducer 2 is amplified by the horn 32 and
then transmitted to the tip 31 side of the probe 6. The distal end portion 31 of the probe 6 is
formed with a treatment portion described later for treating a living tissue.
[0034]
Further, on the outer peripheral surface of the probe main body 34, two rubber linings 35 are
attached at several points of the node position of vibration located halfway in the axial direction
at intervals formed in a ring shape by elastic members. The rubber lining 35 prevents contact
between the outer peripheral surface of the probe main body 34 and the operation pipe 19
described later.
[0035]
That is, at the time of assembly of the insertion sheath portion 8, the probe 6 as a transducerintegrated probe is inserted into the inside of the operation pipe 19. At this time, the rubber
lining 35 prevents contact between the outer peripheral surface of the probe main body 34 and
the operation pipe 19.
[0036]
In addition, the ultrasonic transducer 2 is electrically connected to a not-shown power supply
device main body that supplies a current for generating ultrasonic vibration via an electric cable
36. The ultrasonic transducer 2 is driven by supplying power from the power supply device main
body to the ultrasonic transducer 2 through the wiring in the electric cable 36.
[0037]
From the above description, the transducer unit 3 transmits the ultrasonic transducer 2
generating ultrasonic vibration, the horn 32 amplifying the ultrasonic vibration generated by the
ultrasonic transducer 2 and the amplified ultrasonic vibration. A probe 6 is provided.
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[0038]
(Ultrasonic Transducer) Here, the ultrasonic transducer 2 as an ultrasonic vibration device of the
present invention will be described below.
As shown in FIG. 3 and FIG. 4, the ultrasonic transducer 2 of the transducer unit 3 has the abovementioned horn 32 screwed and connected to the probe main body 34 which is one of the
vibration transfer members in order from the tip From the base end of the horn 32 to the electric
cable 36, a laminated vibrator 41 as a laminated piezoelectric unit, which is a rectangular (square
pole-shaped) ultrasonic wave generating element connected in series to the rear of the horn 32.
And a cover body 51 covering the laminated vibrator 41.
[0039]
In addition, the cover body 51 which covers the lamination ¦ stacking vibrator ¦ oscillator 41 has
the stop 52 which covers the front-end ¦ tip part of the electric cable 36 in a base end part. From
the electric cable 36, two wiring cables 37, 38 as lead wires are led out. The two wiring cables 37
and 38 are electrically connected to the laminated vibrator 41.
[0040]
The laminated vibrator 41 is joined to a front mass 42 made of a rectangular (square columnar)
metal block body, which is two mass members connected to the horn 32 by screwing or the like
on the front side, and the rear side is rectangular. It is joined to the back mass 43 which consists
of a metal block of shape (square pillar).
[0041]
The front mass 42 and the back mass 43 are formed of a metal such as duralumin as in the horn
32 because the front mass 42 and the back mass 43 need to be small in absorption of ultrasonic
vibration and strong in strength.
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The front mass 42 and the back mass 43 may be stainless steel or a titanium alloy such as 64Ti
(Ti-6Al-4V). Further, the lengths of the front mass 42 and the back mass 43 are designed such
that the ultrasonic transducer 2 has a desired resonance frequency.
[0042]
Furthermore, the laminated vibrator 41 may have an insulating member between the front mass
42 and the back mass 43 which is insulating and difficult to damp the vibration. As this
insulating member, for example, an insulating plate formed of a ceramic material such as
alumina, silicon nitride or the like on a rectangular (square columnar) plate may be used.
[0043]
As described above, even if the multi-layered vibrator 41 is provided with the insulating member,
the ultrasonic medical apparatus 1 shown in FIG. And breakage due to high frequency from the
treatment tool is prevented.
[0044]
The laminated vibrator 41 uses a piezoelectric element formed of a lead-free single crystal
material having a high Curie point, and a plurality of piezoelectric single crystals 61 as a
piezoelectric single crystal chip, which is this piezoelectric element, are stacked in this case. It is
arranged.
[0045]
Between the four piezoelectric single crystals 61, the front mass 42 and the back mass 43, a
positive electrode 62 serving as a positive electrode layer and a negative electrode 63 serving as
a negative electrode are alternately interposed.
[0046]
The positive electrode 62 and the negative electrode 63 are not used as bonding materials for
bonding the respective piezoelectric single crystals 61, the piezoelectric single crystal 61 and the
front mass 42 or the back mass 43 to each other. A brazing material such as lead solder, a
conductive paste, or the like is formed by being interposed with a predetermined thickness.
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At this time, a metal such as gold is formed on the positive and negative electrodes of the
piezoelectric single crystal through the contact metal layer.
[0047]
In addition, the laminated vibrator 41 is a wiring cable described above for the positive electrode
62 or the negative electrode 63 provided between the piezoelectric single crystal 61 and
between the piezoelectric single crystal 61 and the front mass 42 or the back mass 43. 37 and
38 are electrically connected by cream solder, conductive paste or the like.
[0048]
(Wiring Cable) Here, the configuration of the wiring cables 37 and 38 of the present embodiment
will be described in detail.
As shown in FIG. 5, in the two wiring cables 37 and 38, the cable sheaths 37b and 38b, which are
insulating coatings covering the cable cores 37a and 38a, are laminated as shown in FIG. 6 by a
device such as a laser wire stripper. Only a portion electrically connected to the positive
electrode 62 or the negative electrode 63 of the vibrator 41 is peeled off to form a plurality of
core wire exposed portions 37c and 38c.
[0049]
The two wiring cables 37 and 38 are formed with core wire exposed portions 37c and 38c that
expose the cable core wires 37a and 38a in accordance with the distance between the positive
electrode 62 and the negative electrode 63 of the laminated vibrator 41. The cable sheaths 37b
and 38b are peeled off at that portion.
[0050]
Further, in the two wiring cables 37 and 38, the cable core wires 37a and 38a are exposed in the
longitudinal axis direction with a length equal to or greater than the dimension in the thickness
direction of the positive electrode 62 or the negative electrode 63 electrically connected. As such,
the length by which the cable sheaths 37b and 38b are peeled off is set.
[0051]
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The two wiring cables 37 and 38 have dimensions equal to or greater than the thickness
direction of the positive electrode 62 or the negative electrode 63 not electrically connected
between the exposed cable core wires 37 a and 38 a along the longitudinal axis direction. The
cable sheaths 37b, 38b cover the cable cores 37a, 38a in length.
[0052]
Specifically, in the two wiring cables 37 and 38 extending from the tip of the electric cable 36,
the wiring cable 37 of the feedback cable is electrically connected to the three negative electrode
63 as the negative side to which power is fed back. Therefore, the thickness of the negative
electrode 63 can be removed by peeling off the cable sheath 37b in a state in which the cable
core 37a is exposed at three locations at intervals corresponding to the three negative electrodes
63 along the longitudinal axis direction. A core exposed portion 37c having a length equal to or
greater than the dimension in the direction is formed.
[0053]
In addition, since the wiring cable 38 of the application cable is electrically connected to the two
positive side electrodes 62 on the positive side to apply power, it corresponds to the two positive
side electrodes 62 along the longitudinal axis direction. By peeling the cable sheath 38b in a
state in which the cable core 38a is exposed at two spaced points, a core exposed portion 38c
having a length equal to or greater than the dimension in the thickness direction of the positive
electrode 62 is formed. Ru.
[0054]
Then, the two wiring cables 37, 38 from which the cable cores 37a, 38a are exposed at the core
exposed portions 37c, 38c are attached to the side surfaces of the laminated vibrator 41 as
shown in FIG. Be
[0055]
The two wiring cables 37 and 38 here are attached so as to be electrically connected to the
different side surfaces of the laminated vibrator 41.
The two wiring cables 37 and 38 may be attached to either different sides or the same side of the
laminated vibrator 41 as long as the two do not short-circuit each other.
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[0056]
Then, cream solder, conductive paste or the like is applied between the cable cores 37a, 38a
exposed at the core exposed portions 37c, 38c and the positive electrode 62 or the negative
electrode 63.
[0057]
From this state, as shown in FIGS. 8 and 9, the cream solder is melted or the conductive paste is
sintered by heating means such as reflow, and the cable cores 37a, 38a and the positive
electrode 62 or the negative electrode are made. The connection parts 55 and 56 which
electrically connect 63 are formed.
[0058]
With such a configuration, in the ultrasonic transducer 2, the cable cores 37 a and 38 a of the
two wiring cables 37 and 38 are directly connected to the positive side electrode 62 or the
negative side electrode 63 of the multilayer vibrator 41. The simple configuration of fixing by 56
and taking an electrical connection makes it possible to manufacture at low cost and improve the
connection strength to the positive electrode 62 or the negative electrode 63.
[0059]
Furthermore, in the ultrasonic transducer 2, only the portion where the cable cores 37 a and 38
a of the two wiring cables 37 and 38 are electrically connected to the positive electrode 62 or
the negative electrode 63 of the multilayer transducer 41 is the cable sheath 37 b Since the
exposed core portions 37c and 38c are formed, the wiring cable 37 on the negative side is the
positive side electrode 62 and the wiring cable 38 on the positive side is the separate side
without the use of an insulating material. Electrical insulation can be secured with the negative
electrode 63 without a short circuit.
[0060]
The two wiring cables 37 and 38 have a contact area with the connection portions 55 and 56
where the cream solder or the conductive paste is solidified by using the winding wires of the
cable core wires 37a and 38a rather than a single wire. Positive electrical connection with the
positive side electrode 62 or the negative side electrode 63, and the connection strength to the
positive side electrode 62 or the negative side electrode 63 is improved to prevent an electrical
connection failure due to peeling or the like. it can.
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[0061]
As described above, the ultrasonic transducer 2 incorporated in the ultrasonic medical device 1
of the present embodiment can be manufactured inexpensively with a very simple structure, and
is a wiring for applying and returning a driving power. It is possible to improve the strength of
the connection portion of certain two wiring cables 37 and 38, and to use the laminated vibrator
41 which is an ultrasonic wave generation element with the characteristics inherent in design.
[0062]
The two wiring cables 37 and 38 electrically connected to the laminated vibrator 41 of the
ultrasonic vibrator 2 described above may be configured as various modifications described
below.
[0063]
First Modified Example As shown in FIG. 10 or FIG. 11, two wiring cables 37 and 38 are
deformed into a so-called wavy shape having a substantially sinusoidal shape with the lamination
direction of the laminated vibrator 41 as the horizontal axis. Alternatively, the cable cores 37a
and 38a may be connected to the positive electrode 62 or the negative electrode 63 of the
laminated vibrator 41 (only the wiring cable 37 is shown in FIGS. 10 and 11).
[0064]
That is, the two wiring cables 37 and 38 are not straight lines but in a wavy line shape, and
electrical connection is made by the connection portions 55 and 56 made of cream solder or
conductive paste rather than the distance between the positive electrode 62 or the negative
electrode 63. And the distance between the two points of the cable cores 37a and 38a is longer.
[0065]
With such a configuration, even if the ultrasonic vibrator 2 is driven with high amplitude, the two
wiring cables 37 and 38 and the positive voltage side are expanded and contracted by the
portions in the wavy line shape of the two wiring cables 37 and 38 being expanded and
contracted. Stress is less likely to be applied to the connection portions 55 and 56 which
electrically connect the electrode 62 or the negative electrode 63, and the vibration resistance is
improved.
[0066]
Second Modified Example As shown in FIGS. 12 to 15, two wiring cables 37 and 38 are
connected to the positive electrode 62 or the negative electrode 63 of the laminated vibrator 41
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by a device such as a laser wire stripper. As a portion to be oppositely electrically connected, a
part of the cable sheaths 37b and 38b, in this case, about half in this case, is peeled off in the
circumferential direction around the longitudinal axis. The shape may be taken (only the wiring
cable 37 is shown in FIG. 12).
[0067]
That is, in order to electrically connect the two wiring cables 37 and 38 to the positive electrode
62 or the negative electrode 63 of the laminated vibrator 41, the cable core wires 37a and 38a
are substantially in the circumferential direction around the longitudinal axis. Core wire exposed
portions 37c and 38c are formed by stripping the cable sheaths 37b and 38b so as to be exposed
at positions facing the positive electrode 62 or the negative electrode 63 by half.
[0068]
Here, also in the two wiring cables 37, 38, the core wire exposed portions 37c, 38c exposing the
cable core wires 37a, 38a in accordance with the distance between the positive electrode 62 or
the negative electrode 63 of the laminated vibrator 41 are present. A plurality of cable sheaths
37b and 38b are formed such that the cable cores 37a and 38a are exposed in the longitudinal
axis direction by a length equal to or greater than the dimension of the positive electrode 62 or
the negative electrode 63 in the thickness direction. The length to be stripped is set.
[0069]
The two wiring cables 37, 38 in which the cable cores 37a, 38a are exposed by approximately
half in the circumferential direction around the longitudinal axis by the respective core exposed
portions 37c, 38c are exposed as the cable cores 37a of the laminated vibrator 41. , 38a face
each other, and cream solder, conductive paste, etc. are applied between the cable cores 37a, 38a
and the positive electrode 62 or the negative electrode 63 as described above. Ru.
[0070]
From this state, as shown in FIG. 16, the cable solders 37a and 38a are exposed by melting the
cream solder or sintering the conductive paste with a heating means such as reflow, in the
circumferential direction about the longitudinal axis. The connection parts 55 and 56 which
electrically connect the positive charge side electrode 62 or the negative charge side electrode
63 are formed.
[0071]
With such a configuration, the two wiring cables 37, 38 have the insulation further improved by
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reducing the exposed portions of the cable cores 37a, 38a, and the cable sheath 37b covering the
cable cores 37a, 38a, Since the 38 b does not move in the axial direction, the two wiring cables
37, 38 can be easily positioned when the laminated vibrator 41 is connected to the positive
electrode 62 or the negative electrode 63.
[0072]
The ultrasonic transducer 2 may be configured as a combination of the first modification and the
second modification.
[0073]
Moreover, although the example of the shape which can be manufactured most cheaply in the
rectangular block shape was mentioned as the ultrasonic transducer 2 in the above-mentioned, it
is not limited to this, For example, the shape of these members made cylindrical shape May be.
[0074]
Furthermore, although the above-mentioned ultrasonic transducer 2 illustrated a configuration in
which a piezoelectric element formed of a lead-free single crystal material is used for the
multilayer transducer 41, the present invention is not limited thereto. This technology is also
applicable to a configuration in which piezoelectric elements such as (PZT, Pb (Zrx, Ti1-x) O3) are
stacked.
[0075]
The invention described in the above-described embodiment is not limited to the embodiment
and the modifications, and in the implementation stage, various modifications can be made
without departing from the scope of the invention.
Furthermore, the above embodiments include inventions of various stages, and various
inventions can be extracted by appropriate combinations of a plurality of disclosed configuration
requirements.
[0076]
For example, even if some of the configuration requirements are removed from all the
configuration requirements shown in the embodiment, the configuration requirements can be
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eliminated if the problems described can be solved and the described advantages can be
obtained. The configuration can be extracted as the invention.
[0077]
Reference Signs List 1 ultrasonic medical device 2 ultrasonic transducer 3 transducer unit 4
handle unit 5 operation unit 6 probe 7 outer sheath tube 8 insertion sheath portion 9 operation
unit main body 10 fixed handle 11 movable handle 12: rotation knob 13: slit 14: handle stopper
15: handle support shaft 16: connection arm 17: operation pipe 18: large diameter portion 19:
operation pipe 20: slider 22: fixing ring 23: grip portion 30: tip treatment portion 31 ... Tip
portion 32 ... Horn 33 ... Outward flange 34 ... Probe main body 35 ... Rubber lining 36 ...
Electrical cable 37, 38 ... Wiring cable 37a, 38a ... Cable core wire 37b, 38b ... Cable sheath 37c,
38c ... Core wire exposed part 41 ... Stacking Vibrator 42-Front mass 43-Back mass 51-Cover 52Break 5 , 56 ... connecting portion 61 ... piezoelectric single crystal body 62 ... Tadashiden side
electrode 63 ... negative charge side electrode
04-05-2019
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