WO2021234793A1 - Treatment tool, cap and method for producing treatment tool - Google Patents

Treatment tool, cap and method for producing treatment tool Download PDF

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Publication number
WO2021234793A1
WO2021234793A1 PCT/JP2020/019691 JP2020019691W WO2021234793A1 WO 2021234793 A1 WO2021234793 A1 WO 2021234793A1 JP 2020019691 W JP2020019691 W JP 2020019691W WO 2021234793 A1 WO2021234793 A1 WO 2021234793A1
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WO
WIPO (PCT)
Prior art keywords
cap
tip
sheath
treatment tool
peripheral surface
Prior art date
Application number
PCT/JP2020/019691
Other languages
French (fr)
Japanese (ja)
Inventor
拓志 南
正美 押田
雅人 井上
Original Assignee
オリンパス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オリンパス株式会社 filed Critical オリンパス株式会社
Priority to PCT/JP2020/019691 priority Critical patent/WO2021234793A1/en
Publication of WO2021234793A1 publication Critical patent/WO2021234793A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current

Definitions

  • the present invention relates to a treatment tool, a cap, and a method for manufacturing the treatment tool.
  • a treatment tool for treating a target site (hereinafter referred to as a target site) in a living tissue by applying energy to the target site has been known (see, for example, Patent Document 1).
  • the treatment tool described in Patent Document 1 is an ultrasonic treatment tool, and includes a vibration transmission member that transmits ultrasonic vibration from the base end to the tip end. This vibration transmitting member is inserted into a tubular sheath with its tip exposed to the outside. Further, a cap for preventing contact with the vibration transmitting member is attached to the tip of the sheath.
  • the cap attached to the tip of the sheath may fall off from the sheath in the following situations, for example.
  • the treatment tool is configured as a treatment tool used under a laparoscope
  • the cap is caught on the trocca when the tip portion of the treatment tool is inserted and removed from the trocca. This may cause the cap to fall off the sheath.
  • the cap comes into contact with another device and receives an external force from the other device. This may cause the cap to fall off the sheath.
  • the biological tissue is squeezed by the tip (end effector) of the vibration transmission member, the cap comes into contact with the biological tissue and receives an external force from the biological tissue. This may cause the cap to fall off the sheath. Therefore, there is a demand for a technique capable of suppressing the cap from falling off from the sheath.
  • the present invention has been made in view of the above, and an object of the present invention is to provide a treatment tool, a cap, and a method for manufacturing the treatment tool capable of suppressing the cap from coming off from the sheath.
  • the treatment tool according to the present invention has a tubular sheath that defines the longitudinal axis direction by extending from the tip to the proximal end, and the tip of the sheath.
  • a cylindrical cap attached to the sheath, an end effector protruding from the tip of the cap and treating a living tissue, and an outer peripheral surface of the sheath and an outer peripheral surface of the cap straddling the boundary between the sheath and the cap.
  • a tube provided at a position covering each of the above-mentioned tubes and contracting in the radial direction orthogonal to the longitudinal axis direction is provided.
  • the cap according to the present invention is a tubular cap used for a treatment tool provided with an end effector for treating a living tissue, and has a tubular shape that defines a longitudinal axis direction by extending from the tip to the proximal end.
  • the outer peripheral surface of the cap is provided with an engaging portion that engages with the tip of the sheath, and the radial dimension orthogonal to the longitudinal axis direction becomes smaller from the engaging portion toward the tip of the cap.
  • the outer surface of the engaging portion and the reduced diameter portion are provided at positions straddling the boundary between the sheath and the cap, and are provided together with the outer peripheral surface of the sheath by a tube that contracts in the radial direction. Be covered.
  • the method for manufacturing a treatment tool according to the present invention is a shaft in which an end effector for treating a living tissue is provided at the tip in a cylindrical sheath that extends from the tip to the base end to define a longitudinal axis direction.
  • a step of arranging the tube and a step of contracting the tube in the radial direction orthogonal to the longitudinal axis direction are provided.
  • the cap According to the treatment tool, the cap, and the method for manufacturing the treatment tool according to the present invention, it is possible to prevent the cap from falling off from the sheath.
  • FIG. 1 is a diagram showing a treatment system according to the first embodiment.
  • FIG. 2 is a diagram showing the inside of the housing.
  • FIG. 3 is a diagram showing the inside of the housing.
  • FIG. 4 is a diagram showing a tip portion of the treatment tool main body.
  • FIG. 5 is a diagram showing a tip portion of the treatment tool main body.
  • FIG. 6 is a diagram showing a cap.
  • FIG. 7 is a diagram showing a cap.
  • FIG. 8 is a flowchart showing a method of manufacturing a treatment tool.
  • FIG. 9 is a diagram illustrating a method for manufacturing a treatment tool.
  • FIG. 10 is a diagram illustrating a method for manufacturing a treatment tool.
  • FIG. 11 is a diagram illustrating a method for manufacturing a treatment tool.
  • FIG. 9 is a diagram showing a method for manufacturing a treatment tool.
  • FIG. 12 is a diagram illustrating a method for manufacturing a treatment tool.
  • FIG. 13 is a diagram illustrating a method for manufacturing a treatment tool.
  • FIG. 14 is a diagram illustrating a method for manufacturing a treatment tool.
  • FIG. 15 is a diagram illustrating a method for manufacturing a treatment tool.
  • FIG. 16 is a diagram illustrating a method for manufacturing a treatment tool.
  • FIG. 17 is a diagram showing a tip portion of the treatment tool main body according to the second embodiment.
  • FIG. 18 is a diagram showing a tip portion of the treatment tool main body according to the second embodiment.
  • FIG. 19 is a diagram showing a tip portion of the treatment tool main body according to the second embodiment.
  • FIG. 20 is a diagram showing a tip portion of the treatment tool main body according to the third embodiment.
  • FIG. 20 is a diagram showing a tip portion of the treatment tool main body according to the third embodiment.
  • FIG. 21 is a diagram showing a tip portion of the treatment tool main body according to the third embodiment.
  • FIG. 22 is a diagram showing a tip portion of the treatment tool main body according to the third embodiment.
  • FIG. 23 is a diagram showing the shape of the sheath according to the fourth embodiment.
  • FIG. 24 is a diagram showing a tip portion of the treatment tool main body according to the fifth embodiment.
  • FIG. 25 is a diagram showing a tip portion of the treatment tool main body according to the fifth embodiment.
  • FIG. 26 is a diagram showing a tip portion of the treatment tool main body according to the fifth embodiment.
  • FIG. 27 is a diagram showing a tip portion of the treatment tool main body according to the sixth embodiment.
  • FIG. 28 is a diagram showing a tip portion of the treatment tool main body according to the sixth embodiment.
  • FIG. 29 is a diagram showing a tip portion of the treatment tool main body according to the sixth embodiment.
  • FIG. 30 is a diagram showing a tip portion of the treatment tool main body according to the seventh embodiment.
  • FIG. 31 is a diagram showing a tip portion of the treatment tool main body according to the seventh embodiment.
  • FIG. 32 is a diagram showing a tip portion of the treatment tool main body according to the seventh embodiment.
  • FIG. 33 is a diagram showing a tip portion of the treatment tool main body according to the eighth embodiment.
  • FIG. 34 is a diagram showing a tip portion of the treatment tool main body according to the eighth embodiment.
  • FIG. 35 is a diagram showing a tip portion of the treatment tool main body according to the eighth embodiment.
  • FIG. 36 is a diagram showing a first cap.
  • FIG. 37 is a diagram showing a tip portion of the treatment tool main body according to the ninth embodiment.
  • FIG. 38 is a diagram showing a tip portion of the treatment tool main body according to the ninth embodiment.
  • FIG. 39 is a diagram showing a tip portion of the treatment tool main body according to the ninth embodiment.
  • FIG. 40 is a diagram showing a tip portion of the treatment tool main body according to the tenth embodiment.
  • FIG. 41 is a diagram showing a tip portion of the treatment tool main body according to the tenth embodiment.
  • FIG. 42 is a diagram showing a cap.
  • FIG. 43 is a diagram showing a cap.
  • FIG. 44 is a diagram showing a tip portion of the treatment tool main body according to the eleventh embodiment.
  • FIG. 45 is a diagram showing a tip portion of the vibration transmission member.
  • FIG. 46 is a diagram showing a tip portion of the vibration transmission member.
  • FIG. 47 is a diagram showing a tip portion of the treatment tool main body according to the twelfth embodiment.
  • FIG. 48 is a diagram showing a tip portion of the treatment tool main body according to the twelfth embodiment.
  • FIG. 1 is a diagram showing a treatment system 1 according to the first embodiment.
  • the treatment system 1 treats the target site in the living tissue by applying treatment energy to the target site (hereinafter referred to as the target site).
  • the target site In the first embodiment, ultrasonic energy and high frequency energy are adopted as the treatment energy. Further, as the treatment, coagulation or incision of the target site can be exemplified.
  • the treatment system 1 includes a treatment tool 2 and a control device 3.
  • the treatment tool 2 is an ultrasonic treatment tool that treats the target site by applying at least ultrasonic energy to the target site.
  • the treatment tool 2 includes a treatment tool main body 4 and an ultrasonic transducer 5.
  • the treatment tool main body 4 is a portion that applies treatment energy to the target site.
  • the treatment tool main body 4 includes a housing 6, a rotary knob 7, a sheath 8 (see FIG. 2), a holding portion 9 (see FIGS. 2 and 3), and a vibration transmitting member 10. , With a cap 11.
  • FIGS. 2 and 3 are views showing the inside of the housing 6.
  • the X-axis is an axis parallel to the central axis Ax of the sheath 8.
  • the central axis Ax corresponds to the longitudinal axis according to the present invention.
  • one side along the central axis Ax will be referred to as the distal end side Ar1, and the other side will be referred to as the proximal end side Ar2.
  • FIG. 2 is a cross-sectional view of the treatment tool main body 4 cut by an XZ plane including the central axis Ax. Further, FIG.
  • FIGS. 1 to 3 is a cross-sectional view of the treatment tool main body 4 cut along the XY plane including the central axis Ax.
  • the housing 6 has a substantially cylindrical shape coaxial with the central axis Ax. Then, the housing 6 supports the entire treatment tool main body 4.
  • the housing 6 is composed of two bodies, the first and second housings 61 and 62, as shown in FIGS. 1 to 3.
  • the first housing 61 includes a base end side housing portion 611 and a tip end side housing portion 612 (FIGS. 1 and 3).
  • the base end side housing portion 611 is located at the base end side Ar2 with respect to the tip end side housing portion 612, and has a cylindrical shape coaxial with the central axis Ax.
  • the ultrasonic transducer 5 is inserted into the base end side housing portion 611.
  • the distal end side housing portion 612 is a portion integrally formed at the end portion of the distal end side Ar1 in the proximal end side housing portion 611, and the cross section cut by the plane orthogonal to the central axis Ax has a substantially semicircular shape.
  • the second housing 62 has a substantially semicircular cross section cut by a plane orthogonal to the central axis Ax. As shown in FIG. 2, a plurality of bosses 621 protruding along the Y axis are provided on the edge of the second housing 62. Then, the second housing 62 presses the plurality of bosses 621 into the plurality of recesses (not shown) provided at the end edge of the tip side housing portion 612, respectively, so that the second housing portion 62 has the tip side housing portion 612. It is attached. That is, the base end side housing portion 611 through which the ultrasonic transducer 5 is inserted is not provided with a boss or the like.
  • the housing 6 is provided with a switch 63 which is provided in a state of being exposed to the outside and accepts a treatment start operation by an operator.
  • the switch 63 outputs an operation signal corresponding to the treatment start operation to the control device 3 via an electric cable C (FIG. 1) that electrically connects the treatment tool 2 and the control device 3. do.
  • the rotary knob 7 has a substantially cylindrical shape coaxial with the central axis Ax, and is provided on Ar1 on the tip end side of the housing 6.
  • the rotation knob 7 accepts a rotation operation by the operator.
  • the rotation operation is an operation of rotating the vibration transmission member 10 around the central axis Ax. Then, the rotation knob 7 and the vibration transmission member 10 rotate about the central axis Ax by the rotation operation.
  • the sheath 8 is a cylindrical pipe made of a material such as metal. Then, the vibration transmission member 10 is inserted through the sheath 8. The structure of the end portion of the tip side Ar1 in the sheath 8 will be described later in “About the tip portion of the treatment tool main body”.
  • the holding portion 9 is made of, for example, a resin material having electrical insulation, and has a substantially cylindrical shape coaxial with the central axis Ax. As shown in FIG. 2 or 3, the holding portion 9 is rotatably housed in the housing 6 with the end portion of the distal end side Ar1 protruding from the housing 6 and centered on the central axis Ax. Then, the holding portion 9 holds the vibration transmitting member 10 with the vibration transmitting member 10 inserted therein. Further, the holding portion 9 holds the sheath 8 in a state where the end portion of the base end side Ar2 of the sheath 8 is inserted into the inside from the distal end side Ar1.
  • the flange portion 91 protruding outward is provided on the tip side Ar1 as shown in FIG.
  • the rotary knob 7 is attached to the holding portion 9 by inserting the end portion of the tip end side Ar1 of the holding portion 9 from the proximal end side Ar2 and locking the claw portion 72 to the flange portion 91. Be done. That is, the rotary knob 7 is attached to the holding portion 9 by the snap-fit method. Therefore, the switch 63 can be provided closer to the rotary knob 7 as compared with the structure in which the rotary knob 7 is attached to the housing 6.
  • the holding portion 9 rotates with the rotary knob 7 about the central axis Ax. Further, since the vibration transmission member 10 and the sheath 8 are attached to the holding portion 9, they rotate together with the holding portion 9 about the central axis Ax.
  • An elastic O-ring 92 (FIG. 3) is attached. The O-ring 92 abuts on the inner peripheral surface of the housing 6. That is, the friction between the O-ring 92 and the housing 6 is used to prevent the rotary knob 7 and the like from unintentionally rotating around the central axis Ax.
  • the cap 11 is made of a resin material such as PEEK (polyetheretherketone) having electrical insulation, and has a substantially cylindrical shape surrounding the central axis Ax.
  • the cap 11 is attached to the tip of the sheath 8. The detailed shape of the cap 11 will be described later in “About the tip portion of the treatment tool main body”.
  • the vibration transmission member 10 corresponds to the shaft member according to the present invention.
  • the vibration transmitting member 10 is made of a conductive material and has an elongated shape extending along the central axis Ax. Further, the vibration transmission member 10 is inserted into the sheath 8, the holding portion 9, and the cap 11 in a state where the end portion 101 (hereinafter referred to as an end effector 101) of the tip side Ar1 is exposed to the outside, and the holding thereof is held. It is fixed to the portion 9. Further, the vibration transmission member 10 is connected to a BLT (bolt-tightened Langevin type oscillator) in which the end portion of the proximal end side Ar2 constitutes the ultrasonic transducer 5.
  • BLT bolt-tightened Langevin type oscillator
  • the vibration transmission member 10 transmits the ultrasonic vibration generated by the BLT from the end portion of the proximal end side Ar2 to the end portion of the distal end side Ar1.
  • the ultrasonic vibration is a longitudinal vibration that vibrates in a direction along the central axis Ax.
  • the detailed shape of the end effector 101 will be described later in “About the tip portion of the treatment tool main body”.
  • the ultrasonic transducer 5 is inserted from the proximal end side Ar2 of the proximal end side housing portion 611 into the proximal end side housing portion 611, and is detachably connected to the proximal end side housing portion 611. Although the specific illustration is omitted, the ultrasonic transducer 5 includes a BLT that generates ultrasonic vibration in response to the supply of a drive signal which is AC power.
  • the treatment tool 2 is detachably connected to the control device 3 by the electric cable C. Then, the control device 3 comprehensively controls the operation of the treatment tool 2 as shown below in response to the operation signal (treatment start operation) input from the switch 63 via the electric cable C.
  • the control device 3 outputs a drive signal to the BLT constituting the ultrasonic transducer 5 via the electric cable C.
  • the BLT generates ultrasonic vibration (longitudinal vibration).
  • the end effector 101 vibrates with a desired amplitude due to the longitudinal vibration. Then, ultrasonic vibration is applied from the end effector 101 to the target portion in contact with the end effector 101. In other words, ultrasonic energy is applied to the target site from the end effector 101.
  • control device 3 is connected to the counter electrode plate (not shown) by an electric cable (not shown).
  • the counter electrode plate is attached to the surface of the subject.
  • the control device 3 outputs a high-frequency signal, which is high-frequency power, between the vibration transmission member 10 and the counter electrode plate via the electric cable C.
  • a high-frequency current flows through the target portion located between the end effector 101 and the counter electrode plate. In other words, high frequency energy is applied to the target portion from the end effector 101.
  • FIG. 4 is a diagram showing the appearance of the tip portion of the treatment tool main body 4.
  • the tube TU is shown by a alternate long and short dash line for convenience of explanation.
  • FIG. 5 is a cross-sectional view of the VV line shown in FIG.
  • the two directions orthogonal to the central axis Ax are the first direction Ar3 and the second direction Ar4.
  • the first direction Ar3 is the vertical direction in FIG.
  • the second direction Ar4 is the vertical direction in FIG.
  • the shape of the end effector 101 will be described. As shown in FIG.
  • the end effector 101 is a first columnar portion 1011 extending along the central axis Ax and substantially orthogonal to the columnar portion 1011 from the end portion of Ar1 on the tip end side of the columnar portion 1011.
  • a hook portion 1012 projecting along the direction Ar3 (lower side in FIG. 4) is provided. That is, the external dimension of the first direction Ar3 in the hook portion 1012 is larger than the external dimension of the first direction Ar3 in the columnar portion 1011. Further, the external dimension of the second direction Ar4 in the hook portion 1012 is smaller than the external dimension of the first direction Ar3.
  • the cap 11 includes an engaging portion 111, a connecting portion 112, and an exposed portion 113.
  • the engaging portion 111 has a cylindrical shape coaxial with the central axis Ax.
  • the outer diameter dimension of the engaging portion 111 is slightly smaller than the inner diameter dimension of the sheath 8.
  • the inner diameter of each of the engaging portion 111, the connecting portion 112, and the exposed portion 113 is smaller than the external dimension of the first direction Ar3 in the hook portion 1012.
  • the engaging portion 111 is provided with a pair of notched portions 1111 penetrating from the outer peripheral surface to the inner peripheral surface.
  • Each of these pair of notch portions 1111 has a U-shape. Then, inside the U-shape of the notch portion 1111, it extends from the tip end side Ar1 toward the proximal end side Ar2, and can be elastically deformed in the radial direction of the engaging portion 111 with the base portion of the distal end side Ar1 as a base point.
  • the claw portion 1112 is formed.
  • the pair of notch portions 1111 (pair of claw portions 1112) are provided at 180 ° rotationally symmetric positions about the central axis Ax.
  • the connecting portion 112 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 111 and the end portion of the proximal end side Ar2 in the exposed portion 113, and has a substantially cylindrical shape surrounding the central axis Ax.
  • the end portion of the base end side Ar2 connected to the engaging portion 111 has a larger outer diameter than the engaging portion 111. That is, on the outer peripheral surface of the cap 11, a first step portion 114 (FIGS. 4 to 7) is provided between the connecting portion 112 and the engaging portion 111.
  • a positioning portion 1113 (FIGS. 4, FIG. 6, FIG. 7) that bulges and extends from the first step portion 114 toward the proximal end side Ar2 is provided. Has been done.
  • the outer peripheral surface of the connecting portion 112 is such that the first inclined surface 1121 and the first tip outer peripheral surface 1122 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of things.
  • the first inclined surface 1121 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the first step portion 114.
  • the first tip outer peripheral surface 1122 is a surface extending linearly from a position in contact with the first inclined surface 1121 toward the tip side Ar1 along the central axis Ax.
  • the exposed portion 113 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the connecting portion 112.
  • the end portion of the proximal end side Ar2 connected to the connecting portion 112 has a larger outer diameter than the first outer peripheral surface 1122. That is, on the outer peripheral surface of the cap 11, a second step portion 115 (FIGS. 4 to 7) is provided between the exposed portion 113 and the connecting portion 112.
  • the outer peripheral surface of the exposed portion 113 has an overhanging surface 1131 that projects outward in the radial direction of the exposed portion 113.
  • the overhanging surface 1131 is a surface in contact with the second step portion 115 and corresponds to the overhanging portion according to the present invention.
  • the outer peripheral surface of the exposed portion 113 has the overhanging surface 1131, the second inclined surface 1132, and the second tip outer peripheral surface 1133 directed from the proximal end side Ar2 to the distal end side Ar1. It is configured by being connected in series.
  • the overhanging surface 1131 is a surface extending linearly from a position in contact with the second step portion 115 toward the tip end side Ar1 along the central axis Ax.
  • the second inclined surface 1132 is a surface whose diameter dimension decreases toward the tip end side Ar1 from the position in contact with the overhanging surface 1131.
  • the second tip outer peripheral surface 1133 is a surface extending substantially linearly from a position in contact with the second inclined surface 1132 toward the tip side Ar1 along the central axis Ax.
  • the outer diameter dimension of the tip portion 110 (FIGS. 4 to 7) having the second tip outer peripheral surface 1133 is smaller than the outer diameter dimension of the engaging portion 111 which is the base end portion of the cap 11. Further, as shown in FIG. 4, the outer diameter dimension of the tip portion 110 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3.
  • the tip portion 110 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4 by reducing the diameter.
  • the cap 11 described above has a first slit 116 (FIG. 6) and a second slit 117 (FIG. 7) on one end side (lower side in FIGS. 6 and 7) in the first direction Ar3. Is provided. These first and second slits 116 and 117 correspond to the slits according to the present invention.
  • the first slit 116 is a slit cut out linearly along the central axis Ax from the tip of the cap 11 to the front of the overhanging surface 1131.
  • the second slit 117 is a slit cut out linearly along the central axis Ax from the base end of the cap 11 to the front side of the first outer peripheral surface 1122.
  • the width dimension of these first and second slits 116 and 117 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
  • a pair of locking openings 811 penetrating the end of the distal end side Ar1 of the sheath 8 from the outer peripheral surface toward the inner peripheral surface and locking the pair of claw portions 1112, respectively (FIGS. 4 and 5).
  • the sheath 8 is provided with a positioning cutout portion 812 (FIG. 4) that is cut out from the tip end toward the proximal end side Ar2 and through which the positioning portion 1113 is inserted.
  • a tube TU (FIGS. 4 and 5) is attached to the outer peripheral surface of the sheath 8 or the like.
  • This tube TU is a heat-shrinkable tube made of a resin material having electrical insulation.
  • FIG. 8 is a flowchart showing a method of manufacturing the treatment tool 2.
  • 9 to 16 are views illustrating a method for manufacturing the treatment tool 2.
  • 12 to 16 are cross-sectional views of the vibration transmitting member 10 and the like cut along a plane including the tip of the hook portion 1012 (the lower end in FIGS. 12 to 16) and the central axis Ax. ..
  • the operator inserts the end portion of the proximal end side Ar2 of the sheath 8 from the distal end side Ar1 of the holding portion 9 into the inside of the holding portion 9 (step S1). Thereby, as shown in FIG. 10, the sheath 8 is attached to the holding portion 9.
  • step S1 the operator inserts the end portion of the distal end side Ar1 of the vibration transmission member 10 from the proximal end side Ar2 of the holding portion 9 into the holding portion 9 and the sheath 8.
  • step S2 the vibration transmission member 10 is attached to the holding portion 9 with the end effector 101 protruding from the tip end side Ar1 of the sheath 8.
  • step S3 the operator attaches the cap 11 to the sheath 8 as shown below (step S3).
  • the operator positions the first and second slits 116 and 117 on the lower side (the tip side of the hook portion 1012) in FIG. 12, and the cap 11 is shown so that the tip side Ar1 is relative to the base end side Ar2. In the middle of 12, it is tilted in a posture located on the lower side. Then, the operator inserts the hook portion 1012 from the second slit 117 in the cap 11 in the posture into the inside of the cap 11.
  • the operator rotates the cap 11 and inserts the columnar portion 1011 from the second slit 117 into the inside of the cap 11.
  • the tip of the hook portion 1012 projects from the first slit 116 to the outside of the cap 11. That is, the first and second slits 116 and 117 are slits provided to prevent interference with the end effector 101.
  • the operator moves the cap 11 toward the base end side Ar2, inserts the positioning portion 1113 through the positioning notch 812, and sheaths the engaging portion 111. Insert into the inside of 8.
  • the hook portion 1012 is in a state of protruding from the cap 11 to the tip side Ar1.
  • the cap 11 is attached to the sheath 8 by locking the claw portion 1112 to the locking opening 811. That is, the cap 11 is attached to the sheath 8 by the snap-fit method.
  • step S3 the operator inserts the end effector 101, the cap 11, the sheath 8, and the end portion of the distal end side Ar1 in the holding portion 9 from the proximal end side Ar2 of the tube TU into the inside of the tube TU. .. Then, the operator applies heat to the tube TU to contract the tube TU in the radial direction of the tube TU (step S4).
  • the tip of the tube TU is located between the overhanging surface 1131 and the first inclined surface 1121, that is, on the first tip outer peripheral surface 1122, as shown in FIG. 4 or FIG.
  • the diameter dimension on the overhanging surface 1131 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG.
  • the diameter dimension of the overhanging surface 1131 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the base end of the tube TU is located on the outer peripheral surface of the end portion of the distal end side Ar1 in the holding portion 9, as shown in the enlarged view of FIG. That is, the gap between the sheath 8 and the holding portion 9 is protected by the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8 and the cap 11 and covers the outer peripheral surface of the sheath 8 and the outer peripheral surface of the cap 11, respectively.
  • the engaging portion 111 and the portion of the first inclined surface 1121 correspond to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the first inclined surface 1121 corresponds to the reduced diameter portion according to the present invention.
  • the treatment tool 2 according to the first embodiment is provided at a position that straddles the boundary between the sheath 8 and the cap 11 and covers the outer peripheral surface of the sheath 8 and the outer peripheral surface of the cap 11, respectively, and has a diameter orthogonal to the central axis Ax.
  • a tube TU that contracts in the direction is provided. That is, the cap 11 is in a state of being tightened by the contraction force of the tube TU. Therefore, according to the treatment tool 2 according to the first embodiment, it is possible to prevent the cap 11 from falling off from the sheath 8.
  • the cap 11 is attached to the sheath 8 by the engaging portion 111 by a snap-fit method. Therefore, the cap 11 can be easily attached to the sheath 8. Then, the tube TU covers the overlap region which is a portion of the engaging portion 111. Therefore, the overlap region can be protected by the tube TU, and the engagement state of the cap 11 with the sheath 8 can be well maintained even when an external force is applied to the overlap region. That is, it is possible to effectively suppress the cap 11 from falling off from the sheath 8.
  • the tube TU covers the first inclined surface 1121. Therefore, the structure is such that the first inclined surface 1121 is caught on the tube TU, and the cap 11 can be effectively suppressed from falling off from the sheath 8.
  • the structure is not limited to the inclined surface as long as it is a structure that is hooked on the tube TU.
  • the tip side Ar1 may be a step having a smaller radial dimension than the base end side Ar2.
  • the diameter dimension on the overhanging surface 1131 is substantially the same as the outer diameter dimension at the tip of the tube TU. Therefore, the outer peripheral surface of the cap 11 and the outer peripheral surface of the tube TU can be connected flush with each other without a step. That is, the cap 11 does not fall off from the sheath 8 due to something being caught on the step. Further, the tube TU does not roll up due to something being caught on the tip of the tube TU.
  • the cap 11 is made of an electrically insulating resin material. Therefore, it is not necessary to cover the tip of the cap 11 with the tube TU. That is, since the tip portion is not covered by the tube TU, the diameter of the tip portion can be reduced, and the field of view of the operator or the like using the treatment tool main body 4 can be secured. Further, the outer peripheral surface of the cap 11 becomes smaller in radial dimension from the overhanging surface 1131 toward the tip of the cap 11. Therefore, similarly to the above, the field of view of the operator or the like who uses the treatment tool main body 4 can be secured by reducing the diameter.
  • the cap 11 is provided with first and second slits 116 and 117. Therefore, the end effector 101 can be inserted into the cap 11 while preventing interference with the end effector 101.
  • the first and second slits 116 and 117 are not slits penetrating from the tip end to the base end of the cap 11. Therefore, it is possible to prevent the strength of the cap 11 from being lowered more than necessary. Further, since the cap 11 can be prevented from being deformed more than necessary, it is possible to prevent the cap 11 from falling off due to the deformation.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the second embodiment will be referred to as the treatment tool 2A.
  • the treatment tool main body 4 according to the second embodiment is referred to as a treatment tool main body 4A.
  • the sheath 8 according to the second embodiment is referred to as a sheath 8A.
  • the cap 11 according to the second embodiment is referred to as a cap 11A.
  • FIGS. 17 to 19 are views showing a tip portion of the treatment tool main body 4A according to the second embodiment. Specifically, FIGS. 17 and 18 are views showing the appearance of the tip portion of the treatment tool main body 4A. In FIG. 17, the tube TU is removed, whereas in FIG. 18, the tube TU is attached. FIG. 19 is a cross-sectional view in which the tip portion of the treatment tool main body 4A is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
  • the cap 11A is made of a resin material such as PEEK having electrical insulation. As shown in FIGS. 17 to 19, the cap 11A includes an engaging portion 121 and an exposed portion 122.
  • the engaging portion 121 includes an engaging portion main body 1211 and a pair of arm portions 1212.
  • the engaging portion main body 1211 has a cylindrical shape coaxial with the central axis Ax.
  • the inner diameter of the engaging portion main body 1211 is slightly larger than the outer diameter of the sheath 8A.
  • the pair of arm portions 1212 project from the base end of the engaging portion main body 1211 toward the base end side Ar2 while facing each other, and are elastically deformable in a direction in which they are close to each other with the base portion of the tip end side Ar1 as the base point.
  • convex portions 1213 (FIG. 17) are provided on the proximal end side Ar2 of the surfaces facing each other.
  • the exposed portion 122 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the engaging portion main body 1211.
  • the inner diameter dimension of the exposed portion 122 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
  • the end portion of the base end side Ar2 connected to the engaging portion main body 1211 has a larger outer diameter than the engaging portion main body 1211. That is, on the outer peripheral surface of the cap 11A, a step portion 123 (FIGS. 17 to 19) is provided between the exposed portion 122 and the engaging portion main body 1211.
  • the outer peripheral surface of the exposed portion 122 has an overhanging surface 1221 that projects outward in the radial direction of the exposed portion 122.
  • the overhanging surface 1221 is a surface in contact with the stepped portion 123 and corresponds to the overhanging portion according to the present invention.
  • the overhanging surface 1221, the inclined surface 1222, and the tip outer peripheral surface 1223 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of.
  • the overhanging surface 1221 is a surface extending linearly from a position in contact with the step portion 123 toward the tip end side Ar1 along the central axis Ax.
  • the inclined surface 1222 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the overhanging surface 1221.
  • the tip outer peripheral surface 1223 is a surface extending linearly from a position in contact with the inclined surface 1222 toward the tip side Ar1 along the central axis Ax.
  • the outer diameter dimension of the tip portion 120 (FIGS. 17 to 19) having the tip outer peripheral surface 1223 is smaller than the outer diameter dimension of the engaging portion main body 1211 which is the base end portion of the cap 11A. Further, the outer diameter dimension of the tip portion 120 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3.
  • the tip portion 120 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4A by reducing the diameter.
  • the cap 11A described above is provided with a slit 124 (FIGS. 17 and 18) linearly cut out along the central axis Ax from the tip end to the base end on one end side in the first direction Ar3. ..
  • the width dimension of the slit 124 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
  • a pair of flat portions 821 are provided at the end portion of the distal end side Ar1 in the sheath 8A by processing a side wall portion.
  • the pair of flat portions 821 are flat plate-shaped portions extending from the tip end of the sheath 8A toward the proximal end side Ar2 and parallel to each other.
  • the distance between the outer surfaces of the pair of flat portions 821 is substantially the same as the distance between the surfaces facing each other in the pair of arm portions 1212.
  • Each of the pair of flat portions 821 is provided with a pair of locking openings 822 (FIG. 17) that penetrate the front and back surfaces and lock the pair of convex portions 1213.
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • the operator inserts the end effector 101 from the base end side Ar2 of the cap 11A into the inside of the cap 11A with the tip of the hook portion 1012 inserted into the slit 124. Then, the operator causes the hook portion 1012 to protrude from the tip end side Ar1 of the cap 11A. Further, the operator moves the cap 11A to the base end side Ar2, slides the pair of convex portions 1213 on the outer surface of the pair of flat portions 821, and inside the engaging portion main body 1211 on the tip end side of the sheath 8A. Insert the end of Ar1. Then, the cap 11A is attached to the sheath 8A by locking the convex portion 1213 to the locking opening 822. That is, the cap 11A is attached to the sheath 8A by a snap-fit method.
  • the diameter dimension of the overhanging surface 1221 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. Further, the diameter dimension of the overhanging surface 1221 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8A and the cap 11A and covers the outer peripheral surface of the sheath 8A and the outer peripheral surface of the cap 11A, respectively. Further, in the sheath 8A and the cap 11A, the portion of the engaging portion 121 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
  • the third embodiment Next, the third embodiment will be described.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the third embodiment will be referred to as the treatment tool 2B.
  • the treatment tool main body 4 according to the third embodiment is referred to as a treatment tool main body 4B.
  • the sheath 8 according to the third embodiment is referred to as a sheath 8B.
  • the cap 11 according to the third embodiment is referred to as a cap 11B.
  • FIGS. 20 to 22 are views showing a tip portion of the treatment tool main body 4B according to the third embodiment. Specifically, FIGS. 20 and 21 are views showing the appearance of the tip portion of the treatment tool main body 4B. In FIG. 20, the tube TU is removed, whereas in FIG. 21, the tube TU is attached.
  • FIG. 22 is a cross-sectional view in which the tip portion of the treatment tool main body 4B is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
  • the cap 11B is made of a resin material such as PTFE (polytetrafluoroethylene) or PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) having electrical insulating properties. As shown in FIGS. 20 to 22, the cap 11B includes an engaging portion 131 and an exposed portion 132.
  • the engaging portion 131 has a cylindrical shape coaxial with the central axis Ax.
  • the outer diameter dimension of the engaging portion 131 is slightly larger than the outer diameter dimension of the end portion of the distal end side Ar1 in the sheath 8B.
  • the inner diameter of the engaging portion 131 is slightly larger than the outer dimension of the first direction Ar3 in the hook portion 1012.
  • the engaging portion 131 is provided with a pair of notched portions 1311 penetrating from the outer peripheral surface to the inner peripheral surface. Each of these pair of notch portions 1311 has a U-shape.
  • the notch 1311 extends from the proximal end side Ar2 toward the distal end side Ar1, and is elastically deformed in the radial direction of the engaging portion 131 with the base portion of the proximal end side Ar2 as a base point.
  • the claw portion 1312 that enables it is formed.
  • the pair of notch portions 1311 (pair of claw portions 1312) are provided at 180 ° rotationally symmetric positions about the central axis Ax.
  • the exposed portion 132 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the engaging portion 131.
  • the end portion of the base end side Ar2 connected to the engaging portion 131 has a larger outer diameter than the engaging portion 131. That is, on the outer peripheral surface of the cap 11B, a step portion 133 (FIGS. 20 to 22) is provided between the exposed portion 132 and the engaging portion 131.
  • the outer peripheral surface of the exposed portion 132 has an overhanging surface 1321 protruding outward in the radial direction of the exposed portion 132.
  • the overhanging surface 1321 is a surface in contact with the stepped portion 133 and corresponds to the overhanging portion according to the present invention.
  • the overhanging surface 1321, the inclined surface 1322, and the tip outer peripheral surface 1323 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of.
  • the overhanging surface 1321 is a surface extending linearly from a position in contact with the step portion 133 toward the tip end side Ar1 along the central axis Ax.
  • the inclined surface 1322 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the overhanging surface 1321.
  • the tip outer peripheral surface 1323 is a surface extending linearly from a position in contact with the inclined surface 1322 toward the tip side Ar1 along the central axis Ax.
  • the inner diameter dimension of the end portion of the tip side Ar1 in the exposed portion 132 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
  • the outer diameter dimension of the tip portion 130 (FIGS. 20 to 22) having the tip outer peripheral surface 1323 is smaller than the outer diameter dimension of the engaging portion 131 which is the base end portion of the cap 11B. Further, the outer diameter dimension of the tip portion 130 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3.
  • the tip 130 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4B by reducing the diameter.
  • the cap 11B described above has a slit 134 (FIGS. 20 to 20) cut out linearly along the central axis Ax from the base end of the exposed portion 132 toward the tip end side Ar1 on one end side in the first direction Ar3. FIG. 22) is provided.
  • the width dimension of the slit 134 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
  • the outer diameter dimension and inner diameter dimension of the end portion of the tip side Ar1 in the sheath 8B becomes smaller toward the tip side Ar1.
  • the inner diameter dimension of the end portion of the tip end side Ar1 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012. Then, the end portion of the distal end side Ar1 penetrates from the outer peripheral surface to the inner peripheral surface and extends from the distal end side of the sheath 8B toward the proximal end side Ar2, and when performing step S2, the hook portion 1012 is used.
  • a slit 831 (FIG. 20) is provided to prevent interference.
  • a pair of locking openings are provided at the end of the distal end side Ar1 so as to penetrate from the outer peripheral surface to the inner peripheral surface and to lock the pair of claw portions 1312 respectively. ..
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • the operator inserts the end effector 101 from the base end side Ar2 of the cap 11B into the inside of the cap 11B. Then, since the cap 11B is made of a relatively soft material such as PTFE or PFA, the operator moves the cap 11B to the proximal end side Ar2 while deforming the cap 11B, and hooks the hook portion 1012. Is projected from Ar1 on the tip end side of the cap 11B.
  • the operator inserts the end portion of Ar1 on the distal end side of the sheath 8B into the inside of the engaging portion 131. Then, the cap 11B is attached to the sheath 8B by locking the claw portion 1312 to the locking opening (not shown) provided in the sheath 8B. That is, the cap 11B is attached to the sheath 8B by the snap-fit method.
  • step S4 when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the engaging portion 131 as shown in FIG. 21 or FIG. 22.
  • the diameter dimension of the overhanging surface 1321 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 22. Further, the diameter dimension of the overhanging surface 1321 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8B and the cap 11B and covers the outer peripheral surface of the sheath 8B and the outer peripheral surface of the cap 11B, respectively. Further, in the sheath 8B and the cap 11B, the portion of the engaging portion 131 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
  • FIG. 23 is a diagram showing the shape of the sheath 8C according to the fourth embodiment.
  • the sheath 8C As shown in FIG. 23, between the end portion of the distal end side Ar1 connected to the cap 11 and the end portion of the proximal end side Ar2 connected to the holding portion 9, the sheath 8C is directed toward the proximal end side Ar2. Therefore, an inclined surface 841 having a small outer diameter is provided.
  • the sheath 8C is provided with the inclined surface 841, it is possible to prevent the tube TU from shifting to the distal end side Ar1 with respect to the sheath 8C.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the fifth embodiment will be referred to as the treatment tool 2D.
  • the treatment tool main body 4 according to the fifth embodiment is referred to as a treatment tool main body 4D.
  • the sheath 8 according to the fifth embodiment is referred to as a sheath 8D.
  • the cap 11 according to the fifth embodiment is referred to as a cap 11D.
  • FIGS. 24 to 26 are views showing the tip portion of the treatment tool main body 4D according to the fifth embodiment. Specifically, FIGS. 24 and 25 are views showing the appearance of the tip portion of the treatment tool main body 4D. In FIG. 24, the tube TU is removed, whereas in FIG. 25, the tube TU is attached.
  • FIG. 26 is a cross-sectional view in which the tip portion of the treatment tool main body 4D is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
  • the cap 11D is made of a resin material such as PEEK having electrical insulation. As shown in FIGS. 24 to 26, the cap 11D includes an engaging portion 141 (FIG. 26), a connecting portion 142 (FIGS. 24 and 26), and an exposed portion 143.
  • the engaging portion 141 has a cylindrical shape coaxial with the central axis Ax.
  • the outer diameter dimension of the engaging portion 141 is slightly smaller than the inner diameter dimension of the sheath 8D.
  • each inner diameter dimension of the engaging portion 141 and the connecting portion 142 is slightly larger than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
  • the outer peripheral surface of the engaging portion 141 is provided with an annular recess 1411 having a ring shape centered on the central axis Ax and recessed toward the central axis Ax.
  • the connecting portion 142 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 141 and the end portion of the proximal end side Ar2 in the exposed portion 143, and has a substantially cylindrical shape surrounding the central axis Ax.
  • the end portion of the base end side Ar2 connected to the engaging portion 141 has a larger outer diameter than the engaging portion 141. That is, on the outer peripheral surface of the cap 11D, a first step portion 144 (FIG. 26) is provided between the connecting portion 142 and the engaging portion 141.
  • the outer peripheral surface of the connecting portion 142 has the proximal outer peripheral surface 1421, the first inclined surface 1422, and the first distal outer peripheral surface 1423 from the proximal end side Ar2 toward the distal end side Ar1. It is configured by being serially installed.
  • the base end outer peripheral surface 1421 is a surface extending linearly from a position in contact with the first step portion 144 toward the tip end side Ar1 along the central axis Ax.
  • the first inclined surface 1422 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the base end outer peripheral surface 1421.
  • the first tip outer peripheral surface 1423 is a surface extending linearly from a position in contact with the first inclined surface 1422 toward the tip side Ar1 along the central axis Ax.
  • the exposed portion 143 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the connecting portion 142.
  • the end portion of the proximal end side Ar2 connected to the connecting portion 142 has a larger outer diameter than the first outer peripheral surface 1423. That is, on the outer peripheral surface of the cap 11D, a second step portion 145 (FIGS. 25 and 26) is provided between the exposed portion 143 and the connecting portion 142.
  • the outer peripheral surface of the exposed portion 143 has an overhanging surface 1431 that projects outward in the radial direction of the exposed portion 143.
  • the overhanging surface 1431 is a surface in contact with the second step portion 145 and corresponds to the overhanging portion according to the present invention.
  • the outer peripheral surface of the exposed portion 143 has an overhanging surface 1431, a second inclined surface 1432, and a second tip outer peripheral surface 1433 directed from the proximal end side Ar2 to the distal end side Ar1. It is configured by being connected in series.
  • the overhanging surface 1431 is a surface extending linearly from a position in contact with the second step portion 145 toward the tip end side Ar1 along the central axis Ax.
  • the second inclined surface 1432 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the overhanging surface 1431.
  • the second tip outer peripheral surface 1433 is a surface extending substantially linearly from a position in contact with the second inclined surface 1432 toward the tip side Ar1 along the central axis Ax.
  • the inner diameter dimension of the end portion of the tip side Ar1 in the exposed portion 143 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
  • the outer diameter dimension of the tip portion 140 (FIGS. 24 to 26) having the second tip outer peripheral surface 1433 is smaller than the outer diameter dimension of the engaging portion 141 which is the base end portion of the cap 11D. Further, the outer diameter dimension of the tip portion 140 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3.
  • the tip portion 140 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4D by reducing the diameter.
  • the cap 11D described above has a slit 146 (FIGS. 24 to 24) cut out linearly along the central axis Ax from the tip of the exposed portion 143 toward the proximal end side Ar2 on one end side in the first direction Ar3. FIG. 26) is provided.
  • the width dimension of the slit 146 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
  • the sheath 8D does not have a pair of locking openings 811 and a positioning notch 812 at the end of the distal end side Ar1.
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • the operator inserts the end effector 101 from the base end side Ar2 of the cap 11D into the inside of the cap 11D. Then, the operator causes the hook portion 1012 to protrude from the tip end side Ar1 of the cap 11D by moving the cap 11D to the proximal end side Ar2 while inserting the tip of the hook portion 1012 into the slit 146. Further, the operator moves the cap 11D to the base end side Ar2 and inserts the engaging portion 141 into the inside of the sheath 8D.
  • the operator deforms the sheath 8D in the direction of reducing the diameter by crimping the sheath 8D using a jig (not shown), and the deformed portion 851 (FIGS. 24 and 26) is formed into the annular recess 1411. To fit into. Thereby, the cap 11D is attached to the sheath 8D.
  • step S4 when the tube TU is attached, the tip of the tube TU is located between the overhanging surface 1431 and the first inclined surface 1422, that is, the first outer peripheral surface of the tip, as shown in FIG. Located on 1423.
  • the diameter dimension on the overhanging surface 1431 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 26. Further, the diameter dimension of the overhanging surface 1431 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8D and the cap 11D and covers the outer peripheral surface of the sheath 8D and the outer peripheral surface of the cap 11D, respectively. Further, in the sheath 8D and the cap 11D, the portion of the engaging portion 141 and the first inclined surface 1422 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the first inclined surface 1422 corresponds to the reduced diameter portion according to the present invention.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the sixth embodiment will be referred to as the treatment tool 2E.
  • the treatment tool main body 4 according to the sixth embodiment is referred to as a treatment tool main body 4E.
  • the cap 11 according to the sixth embodiment is referred to as a cap 11E.
  • the sheath 8 according to the sixth embodiment is referred to as the sheath 8D because it is the same as the sheath 8D described in the above-described fifth embodiment.
  • FIGS. 27 and 28 are views showing the appearance of the tip portion of the treatment tool main body 4E.
  • FIG. 27 the tube TU is removed, whereas in FIG. 28, the tube TU is attached.
  • FIG. 29 is a cross-sectional view in which the tip portion of the treatment tool main body 4E is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
  • the cap 11E is made of a resin material such as PEEK having electrical insulation. As shown in FIG.
  • the cap 11E is divided into two bodies, the first and second caps 11E1 and 11E2, with a plane including the tip of the hook portion 1012 and the central axis Ax as a boundary. be. These first and second caps 11E1 and 11E2 have a shape symmetrical with respect to the plane. Then, in the state where the first and second caps 11E1 and 11E2 are combined, the cap 11E has the engaging portion 151 (FIG. 29) and the connecting portion 152 (FIG. 27, as shown in FIGS. 27 to 29). FIG. 29) and a tip portion 153 are provided.
  • the engaging portion 151 has a cylindrical shape coaxial with the central axis Ax.
  • the outer diameter dimension of the engaging portion 151 is slightly smaller than the inner diameter dimension of the sheath 8D.
  • the outer peripheral surface of the engaging portion 151 is provided with an annular recess 1511 having a ring shape centered on the central axis Ax and recessed toward the central axis Ax.
  • the connecting portion 152 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 151 and the end portion of the proximal end side Ar2 in the distal end portion 153, and has a substantially cylindrical shape surrounding the central axis Ax.
  • the end portion of the base end side Ar2 connected to the engaging portion 151 has a larger outer diameter than the engaging portion 151. That is, on the outer peripheral surface of the cap 11E, a first step portion 154 (FIGS. 27 and 29) is provided between the connecting portion 152 and the engaging portion 151.
  • the outer peripheral surface of the connecting portion 152 has a proximal outer peripheral surface 1521, an inclined surface 1522, and a tip outer peripheral surface 1523 continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of things.
  • the base end outer peripheral surface 1521 is a surface extending linearly from a position in contact with the first step portion 154 toward the tip end side Ar1 along the central axis Ax.
  • the inclined surface 1522 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the base end outer peripheral surface 1521.
  • the tip outer peripheral surface 1523 is a surface extending linearly from a position in contact with the inclined surface 1522 toward the tip side Ar1 along the central axis Ax.
  • the tip portion 153 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 152.
  • the tip portion 153 has a larger outer diameter than the tip outer peripheral surface 1523. That is, on the outer peripheral surface of the cap 11E, a second step portion 155 (FIGS. 27 and 29) is provided between the tip portion 153 and the connecting portion 152.
  • the outer peripheral surface of the tip portion 153 will be referred to as an overhanging surface 1531.
  • This overhanging surface 1531 corresponds to the overhanging portion according to the present invention.
  • the overhanging surface 1531 is a surface extending substantially linearly from a position in contact with the second step portion 155 toward the tip end side Ar1 along the central axis Ax.
  • the outer diameter dimension of the tip portion 153 is smaller than the outer diameter dimension of the engaging portion 151 which is the base end portion of the cap 11E. Further, the outer diameter dimension of the tip portion 153 is smaller than the outer diameter dimension of the first direction Ar3 of the hook portion 1012.
  • the tip portion 153 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4E by reducing the diameter.
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • the operator combines the first and second caps 11E1 and 11E2 in a state where the columnar portion 1011 is located between the first and second caps 11E1 and 11E2. .. In this state, the hook portion 1012 is in a state of protruding from the tip end side Ar1 of the cap 11E in which the first and second caps 11E1 and 11E2 are combined. Then, the operator moves the cap 11E to the base end side Ar2 and inserts the engaging portion 151 into the inside of the sheath 8D.
  • the operator deforms the sheath 8D in the direction of reducing the diameter by crimping the sheath 8D using a jig (not shown), and the deformed portion 851 (FIGS. 27 and 29) is formed into the annular recess 1511. To fit into. Thereby, the cap 11E is attached to the sheath 8D.
  • step S4 when the tube TU is attached, the tip of the tube TU is located between the overhanging surface 1531 and the inclined surface 1522, that is, on the tip outer peripheral surface 1523, as shown in FIG. 29.
  • the diameter dimension on the overhanging surface 1531 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 29.
  • the diameter dimension of the overhanging surface 1531 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8D and the cap 11E and covers the outer peripheral surface of the sheath 8D and the outer peripheral surface of the cap 11E, respectively. Further, in the sheath 8D and the cap 11E, the engaging portion 151 and the inclined surface 1522 portion correspond to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the inclined surface 1522 corresponds to the reduced diameter portion according to the present invention.
  • the cap 11E is composed of two members, the first and second caps 11E1 and 11E2. Therefore, in step S3, it is not necessary to insert the end effector 101 into the cap 11E, and the cap 11E can be easily assembled.
  • the seventh embodiment will be described.
  • the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the seventh embodiment will be referred to as the treatment tool 2F.
  • the treatment tool main body 4 according to the seventh embodiment is referred to as a treatment tool main body 4F.
  • the sheath 8 according to the seventh embodiment is referred to as a sheath 8F.
  • the cap 11 according to the seventh embodiment is referred to as a cap 11F.
  • FIGS. 30 to 32 are views showing a tip portion of the treatment tool main body 4F according to the seventh embodiment. Specifically, FIGS. 30 and 31 are views showing the appearance of the tip portion of the treatment tool main body 4F. In FIG. 30, the tube TU is removed, whereas in FIG. 31, the tube TU is attached.
  • FIG. 32 is a cross-sectional view in which the tip portion of the treatment tool main body 4F is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
  • the cap 11F is made of a resin material such as PEEK having electrical insulation. As shown in FIGS. 30 to 32, the cap 11D includes an engaging portion 161, a connecting portion 162, and an exposed portion 163.
  • the engaging portion 161 has a cylindrical shape coaxial with the central axis Ax.
  • the outer diameter dimension of the engaging portion 161 is slightly larger than the outer diameter dimension of the end portion of the distal end side Ar1 in the sheath 8F.
  • the inner diameter dimension of the engaging portion 161 is slightly larger than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
  • the inner peripheral surface of the engaging portion 161 is provided with an annular recess 1611 having a ring shape centered on the central axis Ax and recessed in a direction away from the central axis Ax. There is.
  • the connecting portion 162 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 161 and the end portion of the proximal end side Ar2 in the exposed portion 163, and has a substantially cylindrical shape surrounding the central axis Ax.
  • the inner diameter dimension of the connecting portion 162 is substantially the same as the inner diameter dimension of the engaging portion 161.
  • the outer peripheral surface of the connecting portion 162 has a first inclined surface 1621 and a first tip outer peripheral surface 1622 continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of things.
  • the first inclined surface 1621 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the engaging portion 161.
  • the first tip outer peripheral surface 1622 is a surface extending linearly from a position in contact with the first inclined surface 1621 toward the tip side Ar1 along the central axis Ax.
  • the exposed portion 163 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the connecting portion 162.
  • the end portion of the base end side Ar2 connected to the connecting portion 162 has a larger outer diameter than the first outer peripheral surface 1622. That is, on the outer peripheral surface of the cap 11F, a step portion 164 (FIGS. 30 and 32) is provided between the exposed portion 163 and the connecting portion 162.
  • the outer peripheral surface of the exposed portion 163 has an overhanging surface 1631 that projects outward in the radial direction of the exposed portion 163.
  • the overhanging surface 1631 is a surface in contact with the stepped portion 164 and corresponds to the overhanging portion according to the present invention.
  • the outer peripheral surface of the exposed portion 163 has an overhanging surface 1631, a second inclined surface 1632, and a second tip outer peripheral surface 1633 directed from the proximal end side Ar2 to the distal end side Ar1. It is configured by being connected in a row.
  • the overhanging surface 1631 is a surface extending linearly from a position in contact with the step portion 164 toward the tip end side Ar1 along the central axis Ax.
  • the second inclined surface 1632 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the overhanging surface 1631.
  • the second tip outer peripheral surface 1633 is a surface extending substantially linearly from a position in contact with the second inclined surface 1632 toward the tip side Ar1 along the central axis Ax.
  • the inner diameter dimension of the end portion of the tip end side Ar1 in the exposed portion 163 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
  • the outer diameter dimension of the tip portion 160 (FIGS. 30 to 32) having the second tip outer peripheral surface 1633 is smaller than the outer diameter dimension of the engaging portion 161 which is the base end portion of the cap 11F. Further, the outer diameter dimension of the tip portion 160 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3.
  • the tip portion 160 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4 by reducing the diameter.
  • the cap 11F described above has a slit 165 (FIGS. 30 to 30), which is linearly cut along the central axis Ax from the tip of the exposed portion 163 toward the proximal end side Ar2 on one end side in the first direction Ar3. FIG. 32) is provided.
  • the width dimension of the slit 165 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
  • the outer diameter dimension and the inner diameter dimension of the end portion of the tip side Ar1 in the sheath 8F becomes smaller toward the tip side Ar1.
  • the inner diameter dimension of the end portion of the tip end side Ar1 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012. Then, the end portion of the distal end side Ar1 penetrates from the outer peripheral surface to the inner peripheral surface and extends from the distal end side of the sheath 8F toward the proximal end side Ar2, and when performing step S2, the hook portion 1012 is used.
  • a slit 861 (FIG. 30) is provided to prevent interference.
  • step S3 the operator inserts the end effector 101 from the base end side Ar2 of the cap 11F into the inside of the cap 11F. Then, the operator causes the hook portion 1012 to protrude from the tip end side Ar1 of the cap 11F by moving the cap 11F to the proximal end side Ar2 while inserting the tip of the hook portion 1012 into the slit 165. Further, the operator moves the cap 11F to the base end side Ar2 and inserts the end portion of the tip end side Ar1 of the sheath 8F into the inside of the engaging portion 161.
  • the operator uses a jig (not shown) to crimp the sheath 8F to deform the sheath 8F in the direction of increasing the diameter, and the deformed portion 862 (FIG. 32) is fitted into the annular recess 1611. Let me. Thereby, the cap 11F is attached to the sheath 8F.
  • step S4 when the tube TU is attached, the tip of the tube TU is between the overhanging surface 1631 and the first inclined surface 1621, that is, the first outer peripheral surface of the tip, as shown in FIG. Located on 1622.
  • the diameter dimension on the overhanging surface 1631 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 32. Further, the diameter dimension of the overhanging surface 1631 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8F and the cap 11F and covers the outer peripheral surface of the sheath 8F and the outer peripheral surface of the cap 11F, respectively. Further, in the sheath 8F and the cap 11F, the portion of the engaging portion 161 and the first inclined surface 1621 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the first inclined surface 1621 corresponds to the reduced diameter portion according to the present invention.
  • the eighth embodiment will be described.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the eighth embodiment will be referred to as the treatment tool 2G.
  • the treatment tool main body 4 according to the eighth embodiment is referred to as a treatment tool main body 4G.
  • the cap 11 according to the eighth embodiment is referred to as a cap 11G.
  • the sheath 8 according to the eighth embodiment is referred to as the sheath 8A because it has substantially the same shape as the sheath 8A described in the second embodiment described above.
  • FIGS. 33 to 35 are views showing the tip portion of the treatment tool main body 4G according to the eighth embodiment.
  • FIG. 36 is a diagram showing the first cap 11G1.
  • FIGS. 33 and 34 are views showing the appearance of the tip portion of the treatment tool main body 4G.
  • the tube TU is removed, whereas in FIG. 34, the tube TU is attached.
  • FIG. 35 is a cross-sectional view in which the tip portion of the treatment tool main body 4G is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
  • the cap 11G is made of a resin material such as PEEK having electrical insulation. As shown in FIGS.
  • the cap 11G is divided into two bodies, the first and second caps 11G1 and 11G2, with a plane including the tip of the hook portion 1012 and the central axis Ax as a boundary. It was done. These first and second caps 11G1 and 11G2 have a shape symmetrical with respect to the plane. Then, in the state where the first and second caps 11G1 and 11G2 are combined, the cap 11G is connected to the engaging portion 171 (FIGS. 33, 35, 36) as shown in FIGS. 33 to 36. A portion 172 (FIG. 33, 35, 36) and a tip portion 173 are provided.
  • the engaging portion 171 has a substantially cylindrical shape coaxial with the central axis Ax.
  • the outer diameter dimension of the engaging portion 171 is slightly smaller than the inner diameter dimension of the sheath 8A.
  • the outer peripheral surface of the engaging portion 171 is provided with a pair of convex portions 1711 protruding in directions away from the central axis Ax. These pair of convex portions 1711 are provided on the first and second caps 11G1 and 11G2, respectively, and are located at positions that are 180 ° rotationally symmetric with respect to the central axis Ax.
  • the connecting portion 172 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 171 and the end portion of the proximal end side Ar2 in the distal end portion 153, and has a substantially cylindrical shape surrounding the central axis Ax.
  • the end portion of the base end side Ar2 connected to the engaging portion 171 has a larger outer diameter than the engaging portion 171. That is, on the outer peripheral surface of the cap 11G, a first step portion 174 (FIGS. 35 and 36) is provided between the connecting portion 172 and the engaging portion 171.
  • the proximal outer peripheral surface 1721, the inclined surface 1722, and the distal outer peripheral surface 1723 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of things.
  • the base end outer peripheral surface 1721 is a surface extending linearly from a position in contact with the first step portion 174 toward the tip end side Ar1 along the central axis Ax.
  • the inclined surface 1722 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the base end outer peripheral surface 1721.
  • the tip outer peripheral surface 1723 is a surface extending linearly from a position in contact with the inclined surface 1722 toward the tip side Ar1 along the central axis Ax.
  • the tip portion 173 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 172.
  • the tip portion 173 has a larger outer diameter than the tip outer peripheral surface 1723. That is, on the outer peripheral surface of the cap 11G, a second step portion 175 (FIGS. 33, 35, 36) is provided between the tip portion 173 and the connecting portion 172.
  • the outer peripheral surface of the tip portion 173 will be referred to as an overhanging surface 1731.
  • This overhanging surface 1731 corresponds to the overhanging portion according to the present invention.
  • the overhanging surface 1731 is a surface extending substantially linearly from a position in contact with the second step portion 175 toward the tip end side Ar1 along the central axis Ax.
  • the outer diameter dimension of the tip portion 173 is smaller than the outer diameter dimension of the engaging portion 171 which is the base end portion of the cap 11G. Further, the outer diameter dimension of the tip portion 173 is smaller than the outer diameter dimension of the first direction Ar3 of the hook portion 1012.
  • the tip portion 173 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4G by reducing the diameter.
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • the operator combines the first and second caps 11G1 and 11G2 in a state where the columnar portion 1011 is located between the first and second caps 11G1 and 11G2. .. In this state, the hook portion 1012 is in a state of protruding from the tip end side Ar1 of the cap 11G in which the first and second caps 11G1 and 11G2 are combined.
  • the operator moves the cap 11G to the base end side Ar2 and inserts the engaging portion 171 into the inside of the sheath 8A.
  • the cap 11G is attached to the sheath 8A by locking the convex portion 1711 to the locking opening 822. That is, the cap 11G is attached to the sheath 8A by the snap-fit method.
  • step S4 when the tube TU is attached, the tip of the tube TU is located between the overhanging surface 1731 and the inclined surface 1722, that is, on the tip outer peripheral surface 1723, as shown in FIG. 35.
  • the diameter dimension on the overhanging surface 1731 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 35.
  • the diameter dimension of the overhanging surface 1731 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8A and the cap 11G and covers the outer peripheral surface of the sheath 8A and the outer peripheral surface of the cap 11G, respectively. Further, in the sheath 8A and the cap 11G, the engaging portion 171 and the inclined surface 1722 portion correspond to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the inclined surface 1722 corresponds to the reduced diameter portion according to the present invention.
  • the ninth embodiment will be described.
  • the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the ninth embodiment will be referred to as the treatment tool 2H.
  • the treatment tool main body 4 according to the ninth embodiment is referred to as a treatment tool main body 4H.
  • the cap 11 according to the ninth embodiment is referred to as a cap 11H.
  • the sheath 8 according to the ninth embodiment is referred to as the sheath 8A because it has substantially the same shape as the sheath 8A described in the second embodiment described above.
  • FIGS. 37 and 38 are views showing the appearance of the tip portion of the treatment tool main body 4H.
  • FIG. 37 the tube TU is removed, whereas in FIG. 38, the tube TU is attached.
  • FIG. 39 is a cross-sectional view in which the tip portion of the treatment tool main body 4H is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
  • the cap 11H is made of a resin material such as PEEK having electrical insulation. As shown in FIG. 37 or FIG.
  • the cap 11H is divided into two bodies, the first and second caps 11H1 and 11H2, with a plane including the tip of the hook portion 1012 and the central axis Ax as a boundary. be. These first and second caps 11H1 and 11H2 have a shape symmetrical with respect to the plane. Then, in the state where the first and second caps 11H1 and 11H2 are combined, the cap 11H has the engaging portion 181 (FIG. 37, 39) and the connecting portion 182 (as shown in FIGS. 37 to 39). 37, 39) and a tip portion 183 are provided.
  • the engaging portion 181 includes an engaging portion main body 1811 and a pair of arm portions 1812.
  • the engaging portion main body 1811 has a cylindrical shape coaxial with the central axis Ax.
  • the outer diameter dimension of the engaging portion main body 1811 is substantially the same as the outer diameter dimension of the sheath 8A.
  • the pair of arm portions 1812 are provided on the first and second caps 11H1 and 11H2, respectively, and are located at positions that are 180 ° rotationally symmetric with respect to the central axis Ax.
  • the pair of arm portions 1812 project from the base end of the engaging portion main body 1811 toward the base end side Ar2 while facing each other, and are elastic in a direction in which they are close to each other with the base portion of the tip end side Ar1 as the base point. Make it deformable.
  • the distance between the faces facing each other in the pair of arm portions 1812 is substantially the same as the distance between the outer surfaces of the pair of flat portions 821 in the sheath 8A.
  • convex portions (not shown) are provided on the proximal end side Ar2 of the surfaces facing each other.
  • the connecting portion 182 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 181 and the end portion of the proximal end side Ar2 in the distal end portion 183, and has a substantially cylindrical shape surrounding the central axis Ax. Further, as shown in FIG. 37 or FIG. 39, the outer peripheral surface of the connecting portion 182 is configured such that the inclined surface 1821 and the tip outer peripheral surface 1822 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. There is.
  • the inclined surface 1821 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the engaging portion 181.
  • the tip outer peripheral surface 1822 is a surface extending linearly from a position in contact with the inclined surface 1821 toward the tip side Ar1 along the central axis Ax.
  • the tip portion 183 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 182.
  • the tip portion 183 has a larger outer diameter than the tip outer peripheral surface 1822. That is, on the outer peripheral surface of the cap 11H, a step portion 184 (FIGS. 37 to 39) is provided between the tip portion 183 and the connection portion 182.
  • the outer peripheral surface of the tip portion 183 will be referred to as an overhanging surface 1831.
  • This overhanging surface 1831 corresponds to the overhanging portion according to the present invention.
  • the overhanging surface 1831 is a surface extending substantially linearly from a position in contact with the step portion 184 toward the tip end side Ar1 along the central axis Ax.
  • the outer diameter dimension of the tip portion 183 is smaller than the outer diameter dimension of the engaging portion main body 1811 which is the base end portion of the cap 11H. Further, the outer diameter dimension of the tip portion 183 is smaller than the outer diameter dimension of the first direction Ar3 of the hook portion 1012.
  • the tip portion 183 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4H by reducing the diameter.
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • the operator has the columnar portions 1011 and the sheath 8A located between the first and second caps 11H1 and 11H2, and the first and second caps 11H1 and the sheath 8A are located between the first and second caps 11H1 and 11H2.
  • 11H2 is combined, and each convex portion (not shown) in the pair of arm portions 1812 is locked with respect to the locking opening 822.
  • the cap 11H is attached to the sheath 8A by attaching the tube TU by step S4.
  • step S4 when the tube TU is attached, the tip of the tube TU is located between the overhanging surface 1831 and the inclined surface 1821, that is, on the tip outer peripheral surface 1822, as shown in FIG. 38 or FIG. 39.
  • the diameter dimension on the overhanging surface 1831 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 39. Further, the diameter dimension of the overhanging surface 1831 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8A and the cap 11H and covers the outer peripheral surface of the sheath 8A and the outer peripheral surface of the cap 11H, respectively.
  • the pair of arm portions 1812 and the inclined surface 1821 portion correspond to the overlapping region according to the present invention that overlaps in the radial direction.
  • the tube TU covers the overlap region. That is, the inclined surface 1821 corresponds to the reduced diameter portion according to the present invention.
  • the tenth embodiment will be described.
  • the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the tenth embodiment will be referred to as a treatment tool 2I.
  • the treatment tool main body 4 according to the tenth embodiment is referred to as a treatment tool main body 4I.
  • the sheath 8 according to the tenth embodiment is referred to as a sheath 8I.
  • the cap 11 according to the tenth embodiment is referred to as a cap 11I.
  • FIGS. 40 and 41 are views showing the tip portion of the treatment tool main body 4I according to the tenth embodiment.
  • 42 and 43 are views showing the cap 11I.
  • FIGS. 40 and 41 are views showing the appearance of the tip portion of the treatment tool main body 4I.
  • the tube TU is removed, whereas in FIG. 41, the tube TU is attached.
  • FIG. 42 is a diagram showing the inside of the cap 11I before bending the pair of living hinges 11I3 and 11I4.
  • FIG. 43 is a diagram showing a cap 11I after bending a pair of living hinges 11I3 and 11I4.
  • the cap 11I is made of a resin material such as PEEK having electrical insulation. As shown in FIG. 42, the cap 11I includes first and second caps 11I1 and 11I2 connected to each other by a pair of living hinges 11I3 and 11I4. Then, by bending the pair of living hinges 11I3 and 11I4 and combining the first and second caps 11I1 and 11I2, a tubular cap 11I is formed as shown in FIG. 43.
  • the first and second caps 11I1 and 11I2 have a shape symmetrical with respect to a plane including the tip of the hook portion 1012 and the central axis Ax.
  • the cap 11I is connected to the engaging portion 191 (FIGS. 40, 42, 43) as shown in FIGS. 40 to 43.
  • a portion 192 (FIG. 40, 42, 43) and an exposed portion 193 are provided.
  • the engaging portion 191 has a cylindrical shape coaxial with the central axis Ax.
  • the outer diameter dimension of the engaging portion 191 is slightly smaller than the inner diameter dimension of the sheath 8I.
  • a pair of locking projections 1911 are provided on the outer peripheral surface of the engaging portion 191 as shown in FIGS. 40, 42, or 43.
  • the pair of locking projections 1911 are provided on the first and second caps 11I1 and 11I2, respectively. More specifically, the pair of locking projections 1911 project from the outer peripheral surface of the engaging portion 191 in a direction away from the central axis Ax, and face the distal end side Ar1 from the base end of the engaging portion 191. Each extends linearly toward each other.
  • the connecting portion 192 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 191 and the end portion of the proximal end side Ar2 in the exposed portion 193, and has a substantially cylindrical shape surrounding the central axis Ax.
  • the connecting portion 192 has a larger outer diameter than the engaging portion 171. That is, on the outer peripheral surface of the cap 11I, a first step portion 194 (FIGS. 40, 42, 43) is provided between the connecting portion 192 and the engaging portion 191.
  • the exposed portion 193 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the connecting portion 192.
  • the end portion of the base end side Ar2 connected to the connecting portion 192 has a larger outer diameter than the connecting portion 192. That is, on the outer peripheral surface of the cap 11I, a second step portion 195 (FIGS. 40 to 43) is provided between the exposed portion 193 and the connecting portion 192.
  • the outer peripheral surface of the exposed portion 193 has an overhanging surface 1931 that projects outward in the radial direction of the exposed portion 193. This overhanging surface 1931 is a surface in contact with the second stepped portion 195 and corresponds to the overhanging portion according to the present invention.
  • the overhanging surface 1931 is a surface extending linearly from a position in contact with the second step portion 195 toward the tip end side Ar1 along the central axis Ax.
  • the inclined surface 1932 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the overhanging surface 1931.
  • the tip outer peripheral surface 1933 is a surface extending substantially linearly from a position in contact with the inclined surface 1932 toward the tip side Ar1 along the central axis Ax.
  • the outer diameter dimension of the tip portion 190 (FIGS. 40, 41, 43) having the tip outer peripheral surface 1933 is smaller than the outer diameter dimension of the engaging portion 191 which is the base end portion of the cap 11I. Further, the outer diameter dimension of the tip portion 190 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3.
  • the tip portion 190 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4I by reducing the diameter.
  • the locking notch 871 includes a narrow portion 8711 located on the distal end side Ar1 and a wide portion 8712 located on the proximal end side Ar2 and having a width larger than that of the narrow portion 8711.
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • the operator bends the pair of living hinges 11E3 and 11E4 with the columnar portion 1011 located inside the cap 11I (upper side in FIG. 42), and the first one. Combine the second caps 11I1 and 11I2.
  • the hook portion 1012 is in a state of protruding from the tip end side Ar1 of the cap 11I in which the first and second caps 11I1 and 11I2 are combined.
  • the operator moves the cap 11I to the base end side Ar2, inserts the engaging portion 191 into the sheath 8I while inserting the pair of locking projections 1911 into the locking notch 871. ..
  • the cap 11I is attached to the sheath 8I by a pair of locking projections 1911 locking to the wide portion 8712 in the locking notch 871.
  • step S4 when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the connecting portion 192.
  • the diameter dimension on the overhanging surface 1931 is substantially the same as the outer diameter dimension at the tip of the tube TU. Further, the diameter dimension on the overhanging surface 1931 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8I and the cap 11I and covers the outer peripheral surface of the sheath 8I and the outer peripheral surface of the cap 11I, respectively. Further, in the sheath 8I and the cap 11I, the portion of the engaging portion 191 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
  • the eleventh embodiment Next, the eleventh embodiment will be described. In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the vibration transmission member 10 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the eleventh embodiment will be referred to as the treatment tool 2J.
  • the treatment tool main body 4 according to the eleventh embodiment is referred to as a treatment tool main body 4J.
  • the vibration transmission member 10 according to the eleventh embodiment is referred to as a vibration transmission member 10J.
  • the cap 11 according to the present embodiment 11 is referred to as a cap 11J.
  • FIG. 44 is a diagram showing a tip portion of the treatment tool main body 4J according to the eleventh embodiment.
  • the tube TU is shown by a alternate long and short dash line for convenience of explanation.
  • 45 and 46 are views showing the tip portion of the vibration transmission member 10J.
  • FIG. 45 is a view of the vibration transmitting member 10J along the second direction Ar4.
  • FIG. 46 is a view of the vibration transmitting member 10J along the first direction Ar3.
  • the vibration transmission member 10J has a different shape of the end effector 101 from the vibration transmission member 10 described in the first embodiment described above.
  • the end effector 101 according to the eleventh embodiment will be referred to as an end effector 101J.
  • the end effector 101J includes a columnar portion 1013 extending along the central axis Ax and a spatula portion 1014 provided at the end of the distal end side Ar1 in the columnar portion 1013. ..
  • the spatula portion 1014 has a width dimension (external dimension of the first direction Ar3) larger than the width dimension of the columnar portion 1013 (external dimension of the first direction Ar3), and the second is directed toward the tip side Ar1. It curves along the direction Ar4.
  • the cap 11J is made of a resin material such as PEEK, PTFE, or PFA having electrical insulation. As shown in FIG. 44, the cap 11J includes an engaging portion 201, a connecting portion 202, and a tip portion 203.
  • the engaging portion 201 has the same shape as the engaging portion 111 described in the first embodiment described above. That is, the engaging portion 201 includes a pair of claw portions 2011 (FIG. 44) similar to the pair of claw portions 1112 described in the first embodiment described above. In the eleventh embodiment, the inner diameter of the engaging portion 201 is slightly larger than the width dimension of the spatula portion 1014.
  • the connecting portion 202 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 201 and the end portion of the proximal end side Ar2 in the distal end portion 203, and has a tubular shape surrounding the central axis Ax.
  • the end portion of the base end side Ar2 connected to the engaging portion 201 has a larger outer diameter than the engaging portion 201. That is, on the outer peripheral surface of the cap 11J, a first step portion 204 (FIG. 44) is provided between the connecting portion 202 and the engaging portion 201.
  • connection portion 202 the external dimension (thickness dimension) of the second direction Ar4 is smaller in the substantially central portion in the direction along the central axis Ax than in the other portions.
  • the thickness of the connecting portion 202 increases from the substantially central portion toward the distal end side Ar1 and the proximal end side Ar2, respectively.
  • the outer dimension (width dimension) of the first direction Ar3 is smaller in the substantially central portion than in the other portions. Then, the width dimension of the connecting portion 202 increases from the substantially central portion toward the distal end side Ar1 and the proximal end side Ar2, respectively.
  • the substantially central portion having the smallest external dimensions in the first and second directions Ar3 and Ar4 will be referred to as an intermediate portion 205 (FIG. 44).
  • the external dimension of the first direction Ar3 in the intermediate portion 205 is smaller than the external dimension of the first direction Ar3 in the other portion of the cap 11J, and further smaller than the width dimension of the spatula portion 1014.
  • the intermediate portion 205 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4J by reducing the diameter.
  • the internal dimensions of the intermediate portion 205 are as follows. That is, the internal dimension of the first direction Ar3 in the intermediate portion 205 is smaller than the width dimension of the spatula portion 1014. Further, the internal dimension of the second direction Ar4 in the intermediate portion 205 is larger than the thickness dimension of the spatula portion 1014 (the external dimension of the second direction Ar4). On the other hand, in the connecting portion 202, the portions other than the intermediate portion 205 have internal dimensions that allow the spatula portion 1014 to be inserted.
  • connection portion 202 described above is provided with slits 206 (FIG. 44) extending linearly along the central axis Ax, straddling the intermediate portion 205 on both ends in the first direction Ar3.
  • the width dimension of the slit 206 is slightly larger than the thickness dimension of the spatula portion 1014.
  • the tip portion 203 has a tubular shape surrounding the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 202.
  • the tip portion 203 has larger external dimensions in the first and second directions Ar3 and Ar4 than the end portion of the tip side Ar1 in the connection portion 202. That is, on the outer peripheral surface of the cap 11J, a second step portion 207 (FIG. 44) is provided between the tip portion 203 and the connection portion 202.
  • the outer peripheral surface of the tip portion 203 will be referred to as an overhanging surface 2031. This overhanging surface 2031 corresponds to the overhanging portion according to the present invention.
  • the tip portion 203 has an internal dimension that allows the spatula portion 1014 to be inserted.
  • the external dimension of the second direction Ar4 at the tip portion 203 is smaller than the outer diameter dimension of the engaging portion 201 which is the base end portion of the cap 11J.
  • the tip portion 203, together with the intermediate portion 205, has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4J by reducing the diameter.
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • the operator inserts the end effector 101J from the base end side Ar2 of the cap 11J into the inside of the cap 11J. Then, the operator moves the cap 11J to the proximal end side Ar2 while inserting the end of the first direction Ar3 in the spatula portion 1014 into the slit 206, whereby the spatula portion 1014 is moved to the tip of the cap 11J. It protrudes from the side Ar1.
  • the operator moves the cap 11J to the base end side Ar2 and inserts the engaging portion 201 into the inside of the sheath 8. Then, the cap 11J is attached to the sheath 8 by locking the claw portion 2011 to the locking opening 811. That is, the cap 11J is attached to the sheath 8 by the snap-fit method.
  • step S4 when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the connecting portion 202 as shown in FIG. 44.
  • the external dimensions of the first and second directions Ar3 and Ar4 on the overhanging surface 2031 are abbreviated as the external dimensions of the first and second directions Ar3 and Ar4 at the tip of the tube TU. It is the same. Further, the external dimensions of the first and second directions Ar3 and Ar4 on the overhanging surface 2031 may be equal to or less than the external dimensions of the first and second directions Ar3 and Ar4 at the tip of the tube TU, respectively.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8 and the cap 11J and covers the outer peripheral surface of the sheath 8 and the outer peripheral surface of the cap 11J, respectively. Further, in the sheath 8 and the cap 11J, the portion of the engaging portion 201 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
  • the twelfth embodiment will be described.
  • the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
  • the configuration of the tip portion of the treatment tool main body 4 (the configuration of the vibration transmission member 10 and the cap 11) is different from that of the first embodiment described above.
  • the treatment tool 2 according to the twelfth embodiment will be referred to as a treatment tool 2K.
  • the treatment tool main body 4 according to the twelfth embodiment is referred to as a treatment tool main body 4K.
  • the cap 11 according to the twelfth embodiment is referred to as a cap 11K.
  • the vibration transmission member 10 according to the twelfth embodiment is referred to as the vibration transmission member 10J because it has the same shape as the vibration transmission member 10J described in the above-described eleventh embodiment.
  • FIG. 47 and 48 are views showing the tip portion of the treatment tool main body 4K according to the twelfth embodiment. Specifically, FIG. 47 is a diagram showing a state in which the spatula portion 1014 is inserted into the inside of the cap 11K.
  • FIG. 48 is a diagram showing the appearance of the treatment tool main body 4K.
  • the cap 11K is made of a resin material such as PTFE or PFA having electrical insulation. As shown in FIG. 47 or FIG. 48, the cap 11K includes a first member 211 and a second member 212.
  • the first member 211 is provided on the proximal end side Ar2 with respect to the second member 212. As shown in FIG. 47, the first member 211 includes an engaging portion 213 having the same shape as the engaging portion 201 described in the above-described eleventh embodiment. That is, the engaging portion 213 includes a pair of claw portions 2131 similar to the pair of claw portions 2011 described in the above-described eleventh embodiment.
  • the first member 212 is swingable along the second direction Ar4 by the connecting portion 214 (FIG. 47) extending from the end portion of the distal end side Ar1 in the engaging portion 213 toward the distal end side Ar1. It is connected to the member 211 of.
  • the second member 212 includes a connecting portion 215 and a tip portion 216.
  • the connecting portion 215 has a cylindrical shape coaxial with the central axis Ax, and is connected to the end portion of the distal end side Ar1 in the connecting portion 214. In the twelfth embodiment, the inner diameter dimension of the connecting portion 215 is smaller than the width dimension of the spatula portion 1014.
  • the tip portion 216 has a substantially cylindrical shape coaxial with the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 215.
  • the tip portion 216 has a larger outer diameter than the connection portion 215. That is, on the outer peripheral surface of the second member 212, a step portion 217 (FIGS. 47 and 48) is provided between the tip portion 216 and the connecting portion 215.
  • the outer peripheral surface of the tip portion 216 has an overhanging surface 2161 (FIG. 48) that projects outward in the radial direction of the tip portion 216.
  • the overhanging surface 2161 is a surface in contact with the stepped portion 217 and corresponds to the overhanging portion according to the present invention.
  • the inner diameter dimension of the tip portion 216 is smaller than the width dimension of the spatula portion 1014.
  • the outer diameter dimension of the tip portion 216 is smaller than the outer diameter dimension of the engaging portion 213 which is the base end portion of the cap 11K. Further, the external dimension of the first direction Ar3 at the tip portion 216 is smaller than the width dimension of the spatula portion 1014.
  • the tip portion 216 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4K by reducing the diameter.
  • step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
  • step S3 according to the twelfth embodiment as shown in FIG. 47, the operator inserts the end effector 101J from the proximal end side Ar2 of the engaging portion 213 into the inside of the engaging portion 213.
  • the cap 11K is made of a relatively soft material such as PTFE or PFA, the operator can deform the cap 11K and end the cap 11K from the base end side of the connection portion 215 to the inside of the connection portion 215. Insert the effector 101J.
  • the spatula portion 1014 protrudes from the tip end side Ar1 of the tip portion 216.
  • the second member 212 is the second member from the upper side to the lower side in FIG. 47, following the curved shape of the spatula portion 1014 as the end effector 101J is inserted into the inside. Move until the central axis of 212 matches the central axis Ax. Then, the cap 11K is attached to the sheath 8 by locking the claw portion 2131 to the locking opening 811. That is, the cap 11K is attached to the sheath 8 by the snap-fit method.
  • step S4 when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the connecting portion 215 as shown in FIG. 48.
  • the diameter dimension on the overhanging surface 2161 is substantially the same as the outer diameter dimension at the tip of the tube TU. Further, the diameter dimension of the overhanging surface 2161 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
  • the tube TU is provided at a position that straddles the boundary between the sheath 8 and the cap 11K and covers the outer peripheral surface of the sheath 8 and the outer peripheral surface of the cap 11K, respectively. Further, in the sheath 8 and the cap 11K, the portion of the engaging portion 213 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
  • the treatment tool according to the present invention is configured to apply both ultrasonic energy and high frequency energy to the target portion, but the present invention is not limited to this, and ultrasonic energy and high frequency energy are not limited to this. , And at least one of the thermal energies may be applied.
  • "giving heat energy to the target portion” means transmitting the heat generated in the heater or the like to the target portion.
  • steps S2 and step S3 may be performed in reverse.
  • the cap 11 is configured not to have the first and second slits 116 and 117, and the cap 11 is configured by an elastic member. Then, in step S3, the end effector 101 is inserted into the inside of the cap 11 while deforming the cap 11, and the end effector 101 is projected from the tip end side Ar1 of the cap 11.

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Abstract

A treatment tool 2 equipped with a cylindrical sheath 8 which defines a long-axis direction by extending from a tip end toward a base end, a cylindrical cap 11 attached to the tip end of the sheath 8, an end effector 101 which treats biological tissue and projects from the tip end of the cap 11, and a tube TU which contracts in the radial direction perpendicular to the long-axis direction, and is provided in a location which covers the outer-circumferential surface of the sheath 8 and the outer-circumferential surface of the cap 11 while straddling the boundary between the sheath 8 and the cap 11.

Description

処置具、キャップ、及び処置具の製造方法Treatment tools, caps, and methods for manufacturing treatment tools
　本発明は、処置具、キャップ、及び処置具の製造方法に関する。 The present invention relates to a treatment tool, a cap, and a method for manufacturing the treatment tool.
　従来、生体組織における処置の対象となる部位（以下、対象部位と記載）に対してエネルギを付与することによって当該対象部位を処置する処置具が知られている（例えば、特許文献１参照）。
　特許文献１に記載の処置具は、超音波処置具であり、超音波振動を基端から先端まで伝達する振動伝達部材を備える。この振動伝達部材は、先端が外部に露出した状態で筒状のシース内に挿通されている。また、当該シースの先端には、当該振動伝達部材との接触を防止するためのキャップが取り付けられている。 Conventionally, a treatment tool for treating a target site (hereinafter referred to as a target site) in a living tissue by applying energy to the target site has been known (see, for example, Patent Document 1).
The treatment tool described in Patent Document 1 is an ultrasonic treatment tool, and includes a vibration transmission member that transmits ultrasonic vibration from the base end to the tip end. This vibration transmitting member is inserted into a tubular sheath with its tip exposed to the outside. Further, a cap for preventing contact with the vibration transmitting member is attached to the tip of the sheath.
特許第４３９８４９３号公報Japanese Patent No. 43984943
　ところで、シースの先端に対して取り付けられたキャップは、例えば、以下に示す状況において、当該シースから脱落してしまう虞がある。
　例えば、処置具を腹腔鏡下で用いる処置具として構成した場合において、当該処置具の先端部分をトロッカに対して抜き差しする際に、当該トロッカに対してキャップが引っ掛かる。これによって、キャップがシースから脱落してしまう場合がある。
　また、例えば、キャップが他のデバイスに対して接触し、当該他のデバイスから外力を受ける。これによって、キャップがシースから脱落してしまう場合がある。
　さらに、例えば、振動伝達部材の先端（エンドエフェクタ）によって生体組織をかき分ける際に、キャップが当該生体組織に対して接触し、当該生体組織から外力を受ける。これによって、キャップがシースから脱落してしまう場合がある。
　そこで、シースからのキャップの脱落を抑制することができる技術が要望されている。 By the way, the cap attached to the tip of the sheath may fall off from the sheath in the following situations, for example.
For example, when the treatment tool is configured as a treatment tool used under a laparoscope, the cap is caught on the trocca when the tip portion of the treatment tool is inserted and removed from the trocca. This may cause the cap to fall off the sheath.
Also, for example, the cap comes into contact with another device and receives an external force from the other device. This may cause the cap to fall off the sheath.
Further, for example, when the biological tissue is squeezed by the tip (end effector) of the vibration transmission member, the cap comes into contact with the biological tissue and receives an external force from the biological tissue. This may cause the cap to fall off the sheath.
Therefore, there is a demand for a technique capable of suppressing the cap from falling off from the sheath.
　本発明は、上記に鑑みてなされたものであって、シースからのキャップの脱落を抑制することができる処置具、キャップ、及び処置具の製造方法を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide a treatment tool, a cap, and a method for manufacturing the treatment tool capable of suppressing the cap from coming off from the sheath.
　上述した課題を解決し、目的を達成するために、本発明に係る処置具は、先端から基端に向けて延在することによって長手軸方向を規定する筒状のシースと、前記シースの先端に対して取り付けられる筒状のキャップと、前記キャップの先端から突出し、生体組織を処置するエンドエフェクタと、前記シースと前記キャップとの境界を跨いで前記シースの外周面と前記キャップの外周面とをそれぞれ覆う位置に設けられ、前記長手軸方向に直交する径方向に収縮するチューブと、を備える。 In order to solve the above-mentioned problems and achieve the object, the treatment tool according to the present invention has a tubular sheath that defines the longitudinal axis direction by extending from the tip to the proximal end, and the tip of the sheath. A cylindrical cap attached to the sheath, an end effector protruding from the tip of the cap and treating a living tissue, and an outer peripheral surface of the sheath and an outer peripheral surface of the cap straddling the boundary between the sheath and the cap. A tube provided at a position covering each of the above-mentioned tubes and contracting in the radial direction orthogonal to the longitudinal axis direction is provided.
　本発明に係るキャップは、生体組織を処置するエンドエフェクタを備えた処置具に用いられる筒状のキャップであって、先端から基端に向けて延在することによって長手軸方向を規定する筒状のシースの先端に対して係合する係合部を備え、前記キャップの外周面は、前記係合部から前記キャップの先端に向かうにしたがって、前記長手軸方向に直交する径方向の寸法が小さくなる縮径部を有し、前記係合部の外面及び前記縮径部は、前記シースと前記キャップとの境界を跨ぐ位置に設けられ、前記径方向に収縮するチューブによって前記シースの外周面とともに覆われる。 The cap according to the present invention is a tubular cap used for a treatment tool provided with an end effector for treating a living tissue, and has a tubular shape that defines a longitudinal axis direction by extending from the tip to the proximal end. The outer peripheral surface of the cap is provided with an engaging portion that engages with the tip of the sheath, and the radial dimension orthogonal to the longitudinal axis direction becomes smaller from the engaging portion toward the tip of the cap. The outer surface of the engaging portion and the reduced diameter portion are provided at positions straddling the boundary between the sheath and the cap, and are provided together with the outer peripheral surface of the sheath by a tube that contracts in the radial direction. Be covered.
　本発明に係る処置具の製造方法は、先端から基端に向けて延在することによって長手軸方向を規定する筒状のシース内に、生体組織を処置するエンドエフェクタが先端に設けられた軸部材を挿通する工程と、前記シースの先端に対して筒状のキャップを取り付ける工程と、前記シースと前記キャップとの境界を跨いで前記シースの外周面と前記キャップの外周面とをそれぞれ覆う位置にチューブを配置する工程と、前記チューブを前記長手軸方向に直交する径方向に収縮させる工程と、を備える。 The method for manufacturing a treatment tool according to the present invention is a shaft in which an end effector for treating a living tissue is provided at the tip in a cylindrical sheath that extends from the tip to the base end to define a longitudinal axis direction. A position for inserting a member, attaching a tubular cap to the tip of the sheath, and straddling the boundary between the sheath and the cap to cover the outer peripheral surface of the sheath and the outer peripheral surface of the cap, respectively. A step of arranging the tube and a step of contracting the tube in the radial direction orthogonal to the longitudinal axis direction are provided.
　本発明に係る処置具、キャップ、及び処置具の製造方法によれば、シースからのキャップの脱落を抑制することができる。 According to the treatment tool, the cap, and the method for manufacturing the treatment tool according to the present invention, it is possible to prevent the cap from falling off from the sheath.
図１は、実施の形態１に係る処置システムを示す図である。FIG. 1 is a diagram showing a treatment system according to the first embodiment. 図２は、ハウジングの内部を示す図である。FIG. 2 is a diagram showing the inside of the housing. 図３は、ハウジングの内部を示す図である。FIG. 3 is a diagram showing the inside of the housing. 図４は、処置具本体の先端部分を示す図である。FIG. 4 is a diagram showing a tip portion of the treatment tool main body. 図５は、処置具本体の先端部分を示す図である。FIG. 5 is a diagram showing a tip portion of the treatment tool main body. 図６は、キャップを示す図である。FIG. 6 is a diagram showing a cap. 図７は、キャップを示す図である。FIG. 7 is a diagram showing a cap. 図８は、処置具の製造方法を示すフローチャートである。FIG. 8 is a flowchart showing a method of manufacturing a treatment tool. 図９は、処置具の製造方法を説明する図である。FIG. 9 is a diagram illustrating a method for manufacturing a treatment tool. 図１０は、処置具の製造方法を説明する図である。FIG. 10 is a diagram illustrating a method for manufacturing a treatment tool. 図１１は、処置具の製造方法を説明する図である。FIG. 11 is a diagram illustrating a method for manufacturing a treatment tool. 図１２は、処置具の製造方法を説明する図である。FIG. 12 is a diagram illustrating a method for manufacturing a treatment tool. 図１３は、処置具の製造方法を説明する図である。FIG. 13 is a diagram illustrating a method for manufacturing a treatment tool. 図１４は、処置具の製造方法を説明する図である。FIG. 14 is a diagram illustrating a method for manufacturing a treatment tool. 図１５は、処置具の製造方法を説明する図である。FIG. 15 is a diagram illustrating a method for manufacturing a treatment tool. 図１６は、処置具の製造方法を説明する図である。FIG. 16 is a diagram illustrating a method for manufacturing a treatment tool. 図１７は、実施の形態２に係る処置具本体の先端部分を示す図である。FIG. 17 is a diagram showing a tip portion of the treatment tool main body according to the second embodiment. 図１８は、実施の形態２に係る処置具本体の先端部分を示す図である。FIG. 18 is a diagram showing a tip portion of the treatment tool main body according to the second embodiment. 図１９は、実施の形態２に係る処置具本体の先端部分を示す図である。FIG. 19 is a diagram showing a tip portion of the treatment tool main body according to the second embodiment. 図２０は、実施の形態３に係る処置具本体の先端部分を示す図である。FIG. 20 is a diagram showing a tip portion of the treatment tool main body according to the third embodiment. 図２１は、実施の形態３に係る処置具本体の先端部分を示す図である。FIG. 21 is a diagram showing a tip portion of the treatment tool main body according to the third embodiment. 図２２は、実施の形態３に係る処置具本体の先端部分を示す図である。FIG. 22 is a diagram showing a tip portion of the treatment tool main body according to the third embodiment. 図２３は、実施の形態４に係るシースの形状を示す図である。FIG. 23 is a diagram showing the shape of the sheath according to the fourth embodiment. 図２４は、実施の形態５に係る処置具本体の先端部分を示す図である。FIG. 24 is a diagram showing a tip portion of the treatment tool main body according to the fifth embodiment. 図２５は、実施の形態５に係る処置具本体の先端部分を示す図である。FIG. 25 is a diagram showing a tip portion of the treatment tool main body according to the fifth embodiment. 図２６は、実施の形態５に係る処置具本体の先端部分を示す図である。FIG. 26 is a diagram showing a tip portion of the treatment tool main body according to the fifth embodiment. 図２７は、実施の形態６に係る処置具本体の先端部分を示す図である。FIG. 27 is a diagram showing a tip portion of the treatment tool main body according to the sixth embodiment. 図２８は、実施の形態６に係る処置具本体の先端部分を示す図である。FIG. 28 is a diagram showing a tip portion of the treatment tool main body according to the sixth embodiment. 図２９は、実施の形態６に係る処置具本体の先端部分を示す図である。FIG. 29 is a diagram showing a tip portion of the treatment tool main body according to the sixth embodiment. 図３０は、実施の形態７に係る処置具本体の先端部分を示す図である。FIG. 30 is a diagram showing a tip portion of the treatment tool main body according to the seventh embodiment. 図３１は、実施の形態７に係る処置具本体の先端部分を示す図である。FIG. 31 is a diagram showing a tip portion of the treatment tool main body according to the seventh embodiment. 図３２は、実施の形態７に係る処置具本体の先端部分を示す図である。FIG. 32 is a diagram showing a tip portion of the treatment tool main body according to the seventh embodiment. 図３３は、実施の形態８に係る処置具本体の先端部分を示す図である。FIG. 33 is a diagram showing a tip portion of the treatment tool main body according to the eighth embodiment. 図３４は、実施の形態８に係る処置具本体の先端部分を示す図である。FIG. 34 is a diagram showing a tip portion of the treatment tool main body according to the eighth embodiment. 図３５は、実施の形態８に係る処置具本体の先端部分を示す図である。FIG. 35 is a diagram showing a tip portion of the treatment tool main body according to the eighth embodiment. 図３６は、第１のキャップを示す図である。FIG. 36 is a diagram showing a first cap. 図３７は、実施の形態９に係る処置具本体の先端部分を示す図である。FIG. 37 is a diagram showing a tip portion of the treatment tool main body according to the ninth embodiment. 図３８は、実施の形態９に係る処置具本体の先端部分を示す図である。FIG. 38 is a diagram showing a tip portion of the treatment tool main body according to the ninth embodiment. 図３９は、実施の形態９に係る処置具本体の先端部分を示す図である。FIG. 39 is a diagram showing a tip portion of the treatment tool main body according to the ninth embodiment. 図４０は、実施の形態１０に係る処置具本体の先端部分を示す図である。FIG. 40 is a diagram showing a tip portion of the treatment tool main body according to the tenth embodiment. 図４１は、実施の形態１０に係る処置具本体の先端部分を示す図である。FIG. 41 is a diagram showing a tip portion of the treatment tool main body according to the tenth embodiment. 図４２は、キャップを示す図である。FIG. 42 is a diagram showing a cap. 図４３は、キャップを示す図である。FIG. 43 is a diagram showing a cap. 図４４は、実施の形態１１に係る処置具本体の先端部分を示す図である。FIG. 44 is a diagram showing a tip portion of the treatment tool main body according to the eleventh embodiment. 図４５は、振動伝達部材の先端部分を示す図である。FIG. 45 is a diagram showing a tip portion of the vibration transmission member. 図４６は、振動伝達部材の先端部分を示す図である。FIG. 46 is a diagram showing a tip portion of the vibration transmission member. 図４７は、実施の形態１２に係る処置具本体の先端部分を示す図である。FIG. 47 is a diagram showing a tip portion of the treatment tool main body according to the twelfth embodiment. 図４８は、実施の形態１２に係る処置具本体の先端部分を示す図である。FIG. 48 is a diagram showing a tip portion of the treatment tool main body according to the twelfth embodiment.
　以下に、図面を参照しつつ、本発明を実施するための形態（以下、実施の形態）について説明する。なお、以下に説明する実施の形態によって本発明が限定されるものではない。さらに、図面の記載において、同一の部分には同一の符号を付している。 Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Further, in the description of the drawings, the same parts are designated by the same reference numerals.
　〔処置システムの概略構成〕
　図１は、実施の形態１に係る処置システム１を示す図である。
　処置システム１は、生体組織における処置の対象となる部位（以下、対象部位と記載）に対して処置エネルギを付与することによって、当該対象部位を処置する。本実施の形態１では、当該処置エネルギとして、超音波エネルギ及び高周波エネルギを採用している。また、当該処置としては、対象部位の凝固や切開を例示することができる。この処置システム１は、図１に示すように、処置具２と、制御装置３とを備える。 [Outline configuration of treatment system]
FIG. 1 is a diagram showing a treatment system 1 according to the first embodiment.
The treatment system 1 treats the target site in the living tissue by applying treatment energy to the target site (hereinafter referred to as the target site). In the first embodiment, ultrasonic energy and high frequency energy are adopted as the treatment energy. Further, as the treatment, coagulation or incision of the target site can be exemplified. As shown in FIG. 1, the treatment system 1 includes a treatment tool 2 and a control device 3.
　〔処置具の構成〕
　処置具２は、対象部位に対して少なくとも超音波エネルギを付与することによって、当該対象部位を処置する超音波処置具である。この処置具２は、図１に示すように、処置具本体４と、超音波トランスデューサ５とを備える。
　処置具本体４は、対象部位に対して処置エネルギを付与する部分である。この処置具本体４は、図１に示すように、ハウジング６と、回転ノブ７と、シース８（図２参照）と、保持部９（図２，図３参照）と、振動伝達部材１０と、キャップ１１とを備える。 [Structure of treatment tool]
The treatment tool 2 is an ultrasonic treatment tool that treats the target site by applying at least ultrasonic energy to the target site. As shown in FIG. 1, the treatment tool 2 includes a treatment tool main body 4 and an ultrasonic transducer 5.
The treatment tool main body 4 is a portion that applies treatment energy to the target site. As shown in FIG. 1, the treatment tool main body 4 includes a housing 6, a rotary knob 7, a sheath 8 (see FIG. 2), a holding portion 9 (see FIGS. 2 and 3), and a vibration transmitting member 10. , With a cap 11.
　図２及び図３は、ハウジング６の内部を示す図である。
　なお、以下で説明する図２及び図３では、図１に示したＸＹＺ座標軸を用いる。Ｘ軸は、シース８の中心軸Ａｘに平行な軸である。当該中心軸Ａｘは、本発明に係る長手軸に相当する。また、以下では、中心軸Ａｘに沿う一方側を先端側Ａｒ１と記載し、他方側を基端側Ａｒ２と記載する。
　そして、図２は、中心軸Ａｘを含むＸＺ平面によって処置具本体４を切断した断面図である。また、図３は、中心軸Ａｘを含むＸＹ平面によって処置具本体４を切断した断面図である。
　ハウジング６は、中心軸Ａｘと同軸となる略円筒形状を有する。そして、ハウジング６は、処置具本体４全体を支持する。本実施の形態１では、ハウジング６は、図１ないし図３に示すように、第１，第２のハウジング６１，６２の２体によって構成されている。 2 and 3 are views showing the inside of the housing 6.
In FIGS. 2 and 3 described below, the XYZ coordinate axes shown in FIG. 1 are used. The X-axis is an axis parallel to the central axis Ax of the sheath 8. The central axis Ax corresponds to the longitudinal axis according to the present invention. Further, in the following, one side along the central axis Ax will be referred to as the distal end side Ar1, and the other side will be referred to as the proximal end side Ar2.
FIG. 2 is a cross-sectional view of the treatment tool main body 4 cut by an XZ plane including the central axis Ax. Further, FIG. 3 is a cross-sectional view of the treatment tool main body 4 cut along the XY plane including the central axis Ax.
The housing 6 has a substantially cylindrical shape coaxial with the central axis Ax. Then, the housing 6 supports the entire treatment tool main body 4. In the first embodiment, the housing 6 is composed of two bodies, the first and second housings 61 and 62, as shown in FIGS. 1 to 3.
　第１のハウジング６１は、図１ないし図３に示すように、基端側ハウジング部６１１と、先端側ハウジング部６１２（図１，図３）とを備える。
　基端側ハウジング部６１１は、先端側ハウジング部６１２に対して基端側Ａｒ２に位置し、中心軸Ａｘと同軸となる円筒形状を有する。そして、基端側ハウジング部６１１内には、超音波トランスデューサ５が挿通される。
　先端側ハウジング部６１２は、基端側ハウジング部６１１における先端側Ａｒ１の端部に一体形成された部分であり、中心軸Ａｘに直交する平面によって切断した断面が略半円形状を有する。
　第２のハウジング６２は、中心軸Ａｘに直交する平面によって切断した断面が略半円形状を有する。この第２のハウジング６２の端縁には、図２に示すように、Ｙ軸に沿ってそれぞれ突出する複数のボス６２１が設けられている。そして、第２のハウジング６２は、当該複数のボス６２１を先端側ハウジング部６１２の端縁に設けられた複数の凹部（図示略）にそれぞれ圧入することによって、当該先端側ハウジング部６１２に対して取り付けられる。すなわち、内部に超音波トランスデューサ５が挿通される基端側ハウジング部６１１には、ボス等が設けられていない。 As shown in FIGS. 1 to 3, the first housing 61 includes a base end side housing portion 611 and a tip end side housing portion 612 (FIGS. 1 and 3).
The base end side housing portion 611 is located at the base end side Ar2 with respect to the tip end side housing portion 612, and has a cylindrical shape coaxial with the central axis Ax. Then, the ultrasonic transducer 5 is inserted into the base end side housing portion 611.
The distal end side housing portion 612 is a portion integrally formed at the end portion of the distal end side Ar1 in the proximal end side housing portion 611, and the cross section cut by the plane orthogonal to the central axis Ax has a substantially semicircular shape.
The second housing 62 has a substantially semicircular cross section cut by a plane orthogonal to the central axis Ax. As shown in FIG. 2, a plurality of bosses 621 protruding along the Y axis are provided on the edge of the second housing 62. Then, the second housing 62 presses the plurality of bosses 621 into the plurality of recesses (not shown) provided at the end edge of the tip side housing portion 612, respectively, so that the second housing portion 62 has the tip side housing portion 612. It is attached. That is, the base end side housing portion 611 through which the ultrasonic transducer 5 is inserted is not provided with a boss or the like.
　また、ハウジング６には、図１または図２に示すように、外部に露出した状態でそれぞれ設けられ、術者による処置開始操作を受け付けるスイッチ６３が設けられている。当該スイッチ６３は、処置具２と制御装置３とを電気的に接続する電気ケーブルＣ（図１）を経由することによって、当該制御装置３に対して当該処置開始操作に応じた操作信号を出力する。 Further, as shown in FIG. 1 or 2, the housing 6 is provided with a switch 63 which is provided in a state of being exposed to the outside and accepts a treatment start operation by an operator. The switch 63 outputs an operation signal corresponding to the treatment start operation to the control device 3 via an electric cable C (FIG. 1) that electrically connects the treatment tool 2 and the control device 3. do.
　回転ノブ７は、図１ないし図３に示すように、中心軸Ａｘと同軸となる略円筒形状を有し、ハウジング６の先端側Ａｒ１に設けられている。この回転ノブ７は、術者による回転操作を受け付ける。当該回転操作は、中心軸Ａｘを中心として振動伝達部材１０を回転させる操作である。そして、回転ノブ７及び振動伝達部材１０は、当該回転操作によって、中心軸Ａｘを中心として回転する。 As shown in FIGS. 1 to 3, the rotary knob 7 has a substantially cylindrical shape coaxial with the central axis Ax, and is provided on Ar1 on the tip end side of the housing 6. The rotation knob 7 accepts a rotation operation by the operator. The rotation operation is an operation of rotating the vibration transmission member 10 around the central axis Ax. Then, the rotation knob 7 and the vibration transmission member 10 rotate about the central axis Ax by the rotation operation.
　シース８は、金属等の材料によって構成された円筒状のパイプである。そして、シース８には、振動伝達部材１０が挿通される。
　なお、シース８における先端側Ａｒ１の端部の構造については、後述する「処置具本体の先端部分について」において説明する。 The sheath 8 is a cylindrical pipe made of a material such as metal. Then, the vibration transmission member 10 is inserted through the sheath 8.
The structure of the end portion of the tip side Ar1 in the sheath 8 will be described later in "About the tip portion of the treatment tool main body".
　保持部９は、電気絶縁性を有する例えば樹脂材料によって構成され、中心軸Ａｘと同軸となる略円筒形状を有する。この保持部９は、図２または図３に示すように、先端側Ａｒ１の端部がハウジング６から突出した状態で、中心軸Ａｘを中心として回転可能に当該ハウジング６内に収納されている。そして、保持部９は、内部に振動伝達部材１０が挿通された状態で当該振動伝達部材１０を保持する。また、保持部９は、シース８の基端側Ａｒ２の端部が先端側Ａｒ１から内部に挿通された状態で当該シース８を保持する。 The holding portion 9 is made of, for example, a resin material having electrical insulation, and has a substantially cylindrical shape coaxial with the central axis Ax. As shown in FIG. 2 or 3, the holding portion 9 is rotatably housed in the housing 6 with the end portion of the distal end side Ar1 protruding from the housing 6 and centered on the central axis Ax. Then, the holding portion 9 holds the vibration transmitting member 10 with the vibration transmitting member 10 inserted therein. Further, the holding portion 9 holds the sheath 8 in a state where the end portion of the base end side Ar2 of the sheath 8 is inserted into the inside from the distal end side Ar1.
　ここで、保持部９の外周面において、先端側Ａｒ１には、図３に示すように、外部に向けて張り出したフランジ部９１が設けられている。また、回転ノブ７の内周面には、中心軸Ａｘに向けて突出した基部７１と、当該基部７１から基端側Ａｒ２に向けて突出し、当該基部７１を基点として当該回転ノブ７の径方向に弾性変形可能とする爪部７２とが設けられている。そして、回転ノブ７は、基端側Ａｒ２から保持部９の先端側Ａｒ１の端部が挿通され、爪部７２がフランジ部９１に対して係止することによって、当該保持部９に対して取り付けられる。すなわち、回転ノブ７は、スナップフィット方式によって、保持部９に対して取り付けられる。このため、回転ノブ７をハウジング６に対して取り付ける構造と比較して、スイッチ６３を回転ノブ７に対して近接して設けることが可能となる。 Here, on the outer peripheral surface of the holding portion 9, the flange portion 91 protruding outward is provided on the tip side Ar1 as shown in FIG. Further, on the inner peripheral surface of the rotary knob 7, a base portion 71 projecting toward the central axis Ax and a base portion 71 projecting from the base portion 71 toward the proximal end side Ar2, with the base portion 71 as a base point, in the radial direction of the rotary knob 7. Is provided with a claw portion 72 that can be elastically deformed. Then, the rotary knob 7 is attached to the holding portion 9 by inserting the end portion of the tip end side Ar1 of the holding portion 9 from the proximal end side Ar2 and locking the claw portion 72 to the flange portion 91. Be done. That is, the rotary knob 7 is attached to the holding portion 9 by the snap-fit method. Therefore, the switch 63 can be provided closer to the rotary knob 7 as compared with the structure in which the rotary knob 7 is attached to the housing 6.
　そして、術者による回転ノブ７への回転操作に応じて、保持部９は、中心軸Ａｘを中心として、当該回転ノブ７とともに回転する。また、振動伝達部材１０及びシース８は、保持部９に対して取り付けられているため、中心軸Ａｘを中心として、当該保持部９とともに回転する。
　ここで、保持部９の外周面には、回転ノブ７、当該保持部９、振動伝達部材１０、及びシース８が意図せずに中心軸Ａｘを中心として回転してしまうことを防止するために、弾性を有するＯリング９２（図３）が取り付けられている。当該Ｏリング９２は、ハウジング６の内周面に対して当接する。すなわち、Ｏリング９２とハウジング６との間の摩擦を利用して、回転ノブ７等が意図せずに中心軸Ａｘを中心として回転してしまうことを防止している。 Then, in response to the rotation operation of the rotary knob 7 by the operator, the holding portion 9 rotates with the rotary knob 7 about the central axis Ax. Further, since the vibration transmission member 10 and the sheath 8 are attached to the holding portion 9, they rotate together with the holding portion 9 about the central axis Ax.
Here, in order to prevent the rotary knob 7, the holding portion 9, the vibration transmitting member 10, and the sheath 8 from unintentionally rotating around the central axis Ax on the outer peripheral surface of the holding portion 9. , An elastic O-ring 92 (FIG. 3) is attached. The O-ring 92 abuts on the inner peripheral surface of the housing 6. That is, the friction between the O-ring 92 and the housing 6 is used to prevent the rotary knob 7 and the like from unintentionally rotating around the central axis Ax.
　キャップ１１は、電気絶縁性を有するＰＥＥＫ（ポリエーテルエーテルケトン）等の樹脂材料によって構成され、中心軸Ａｘを囲む略円筒形状を有する。そして、キャップ１１は、シース８の先端に対して取り付けられている。
　なお、キャップ１１の詳細な形状については、後述する「処置具本体の先端部分について」において説明する。 The cap 11 is made of a resin material such as PEEK (polyetheretherketone) having electrical insulation, and has a substantially cylindrical shape surrounding the central axis Ax. The cap 11 is attached to the tip of the sheath 8.
The detailed shape of the cap 11 will be described later in "About the tip portion of the treatment tool main body".
　振動伝達部材１０は、本発明に係る軸部材に相当する。この振動伝達部材１０は、導電性材料によって構成され、中心軸Ａｘに沿って延在した長尺形状を有する。また、振動伝達部材１０は、先端側Ａｒ１の端部１０１（以下、エンドエフェクタ１０１と記載）が外部に露出した状態で、シース８、保持部９、及びキャップ１１内に挿通されるとともに当該保持部９に対して固定される。さらに、振動伝達部材１０は、基端側Ａｒ２の端部が超音波トランスデューサ５を構成するＢＬＴ（ボルト締めランジュバン型振動子）に対して接続する。そして、振動伝達部材１０は、当該ＢＬＴが発生させた超音波振動を基端側Ａｒ２の端部から先端側Ａｒ１の端部まで伝達する。本実施の形態１では、当該超音波振動は、中心軸Ａｘに沿う方向に振動する縦振動である。
　なお、エンドエフェクタ１０１の詳細な形状については、後述する「処置具本体の先端部分について」において説明する。 The vibration transmission member 10 corresponds to the shaft member according to the present invention. The vibration transmitting member 10 is made of a conductive material and has an elongated shape extending along the central axis Ax. Further, the vibration transmission member 10 is inserted into the sheath 8, the holding portion 9, and the cap 11 in a state where the end portion 101 (hereinafter referred to as an end effector 101) of the tip side Ar1 is exposed to the outside, and the holding thereof is held. It is fixed to the portion 9. Further, the vibration transmission member 10 is connected to a BLT (bolt-tightened Langevin type oscillator) in which the end portion of the proximal end side Ar2 constitutes the ultrasonic transducer 5. Then, the vibration transmission member 10 transmits the ultrasonic vibration generated by the BLT from the end portion of the proximal end side Ar2 to the end portion of the distal end side Ar1. In the first embodiment, the ultrasonic vibration is a longitudinal vibration that vibrates in a direction along the central axis Ax.
The detailed shape of the end effector 101 will be described later in "About the tip portion of the treatment tool main body".
　超音波トランスデューサ５は、基端側ハウジング部６１１の基端側Ａｒ２から当該基端側ハウジング部６１１内に挿通されるとともに、当該基端側ハウジング部６１１に対して着脱自在に接続される。この超音波トランスデューサ５は、具体的な図示は省略したが、交流電力である駆動信号の供給に応じて超音波振動を発生させるＢＬＴを備える。 The ultrasonic transducer 5 is inserted from the proximal end side Ar2 of the proximal end side housing portion 611 into the proximal end side housing portion 611, and is detachably connected to the proximal end side housing portion 611. Although the specific illustration is omitted, the ultrasonic transducer 5 includes a BLT that generates ultrasonic vibration in response to the supply of a drive signal which is AC power.
　〔制御装置の構成〕
　制御装置３には、電気ケーブルＣによって処置具２が着脱自在に接続される。そして、制御装置３は、電気ケーブルＣを経由することによってスイッチ６３から入力した操作信号（処置開始操作）に応じて、以下に示すように処置具２の動作を統括的に制御する。
　制御装置３は、電気ケーブルＣを経由することによって、超音波トランスデューサ５を構成するＢＬＴに対して駆動信号を出力する。これによって、当該ＢＬＴは、超音波振動（縦振動）を発生させる。また、エンドエフェクタ１０１は、当該縦振動によって、所望の振幅で振動する。そして、当該エンドエフェクタ１０１に対して接触した対象部位には、当該エンドエフェクタ１０１から超音波振動が付与される。言い換えれば、当該エンドエフェクタ１０１から対象部位に対して超音波エネルギが付与される。 [Control device configuration]
The treatment tool 2 is detachably connected to the control device 3 by the electric cable C. Then, the control device 3 comprehensively controls the operation of the treatment tool 2 as shown below in response to the operation signal (treatment start operation) input from the switch 63 via the electric cable C.
The control device 3 outputs a drive signal to the BLT constituting the ultrasonic transducer 5 via the electric cable C. As a result, the BLT generates ultrasonic vibration (longitudinal vibration). Further, the end effector 101 vibrates with a desired amplitude due to the longitudinal vibration. Then, ultrasonic vibration is applied from the end effector 101 to the target portion in contact with the end effector 101. In other words, ultrasonic energy is applied to the target site from the end effector 101.
　また、制御装置３は、電気ケーブル（図示略）によって、対極板（図示略）に対して接続される。当該対極板は、被検体の表面に対して取り付けられる。そして、制御装置３は、電気ケーブルＣを経由することによって、振動伝達部材１０と当該対極板との間に高周波電力である高周波信号を出力する。これによって、エンドエフェクタ１０１と当該対極板との間に位置する対象部位には、高周波電流が流れる。言い換えれば、当該エンドエフェクタ１０１から対象部位に対して高周波エネルギが付与される。 Further, the control device 3 is connected to the counter electrode plate (not shown) by an electric cable (not shown). The counter electrode plate is attached to the surface of the subject. Then, the control device 3 outputs a high-frequency signal, which is high-frequency power, between the vibration transmission member 10 and the counter electrode plate via the electric cable C. As a result, a high-frequency current flows through the target portion located between the end effector 101 and the counter electrode plate. In other words, high frequency energy is applied to the target portion from the end effector 101.
　〔処置具本体の先端部分について〕
　次に、処置具本体４の先端部分について説明する。
　図４及び図５は、処置具本体４の先端部分を示す図である。具体的に、図４は、処置具本体４の先端部分の外観を示す図である。なお、図４では、説明の便宜上、チューブＴＵを一点鎖線で図示している。図５は、図４に示したV-V線の断面図である。
　なお、図４及び図５では、中心軸Ａｘに直交する２つの方向を第１の方向Ａｒ３及び第２の方向Ａｒ４としている。当該第１の方向Ａｒ３は、図４中、上下方向である。当該第２の方向Ａｒ４は、図５中、上下方向である。
　先ず、エンドエフェクタ１０１の形状について説明する。
　エンドエフェクタ１０１は、図４に示すように、中心軸Ａｘに沿って延在する柱状部１０１１と、当該柱状部１０１１の先端側Ａｒ１の端部から当該柱状部１０１１に対して略直交する第１の方向Ａｒ３（図４中、下方）に沿って突出するフック部１０１２とを備える。
　すなわち、フック部１０１２における第１の方向Ａｒ３の外形寸法は、柱状部１０１１における第１の方向Ａｒ３の外形寸法よりも大きい。また、フック部１０１２における第２の方向Ａｒ４の外形寸法は、第１の方向Ａｒ３の外形寸法よりも小さい。 [About the tip of the treatment tool body]
Next, the tip portion of the treatment tool main body 4 will be described.
4 and 5 are views showing the tip portion of the treatment tool main body 4. Specifically, FIG. 4 is a diagram showing the appearance of the tip portion of the treatment tool main body 4. In FIG. 4, the tube TU is shown by a alternate long and short dash line for convenience of explanation. FIG. 5 is a cross-sectional view of the VV line shown in FIG.
In FIGS. 4 and 5, the two directions orthogonal to the central axis Ax are the first direction Ar3 and the second direction Ar4. The first direction Ar3 is the vertical direction in FIG. The second direction Ar4 is the vertical direction in FIG.
First, the shape of the end effector 101 will be described.
As shown in FIG. 4, the end effector 101 is a first columnar portion 1011 extending along the central axis Ax and substantially orthogonal to the columnar portion 1011 from the end portion of Ar1 on the tip end side of the columnar portion 1011. A hook portion 1012 projecting along the direction Ar3 (lower side in FIG. 4) is provided.
That is, the external dimension of the first direction Ar3 in the hook portion 1012 is larger than the external dimension of the first direction Ar3 in the columnar portion 1011. Further, the external dimension of the second direction Ar4 in the hook portion 1012 is smaller than the external dimension of the first direction Ar3.
　次に、キャップ１１の構成について説明する。
　図６及び図７は、キャップ１１を示す図である。
　キャップ１１は、図４ないし図７に示すように、係合部１１１と、接続部１１２と、露出部１１３とを備える。
　係合部１１１は、中心軸Ａｘと同軸となる円筒形状を有する。本実施の形態１では、係合部１１１の外径寸法は、シース８の内径寸法よりも若干小さい。また、係合部１１１、接続部１１２、及び露出部１１３における各内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。
　この係合部１１１には、図６または図７に示すように、外周面から内周面に向けてそれぞれ貫通した一対の切欠き部１１１１が設けられている。これら一対の切欠き部１１１１は、Ｕ字形状をそれぞれ有する。そして、切欠き部１１１１におけるＵ字状の内側には、先端側Ａｒ１から基端側Ａｒ２に向けて延在し、当該先端側Ａｒ１の基部を基点として係合部１１１の径方向に弾性変形可能とする爪部１１１２が形成される。ここで、一対の切欠き部１１１１（一対の爪部１１１２）は、中心軸Ａｘを中心とする１８０°の回転対称位置に設けられている。 Next, the configuration of the cap 11 will be described.
6 and 7 are views showing the cap 11.
As shown in FIGS. 4 to 7, the cap 11 includes an engaging portion 111, a connecting portion 112, and an exposed portion 113.
The engaging portion 111 has a cylindrical shape coaxial with the central axis Ax. In the first embodiment, the outer diameter dimension of the engaging portion 111 is slightly smaller than the inner diameter dimension of the sheath 8. Further, the inner diameter of each of the engaging portion 111, the connecting portion 112, and the exposed portion 113 is smaller than the external dimension of the first direction Ar3 in the hook portion 1012.
As shown in FIG. 6 or 7, the engaging portion 111 is provided with a pair of notched portions 1111 penetrating from the outer peripheral surface to the inner peripheral surface. Each of these pair of notch portions 1111 has a U-shape. Then, inside the U-shape of the notch portion 1111, it extends from the tip end side Ar1 toward the proximal end side Ar2, and can be elastically deformed in the radial direction of the engaging portion 111 with the base portion of the distal end side Ar1 as a base point. The claw portion 1112 is formed. Here, the pair of notch portions 1111 (pair of claw portions 1112) are provided at 180 ° rotationally symmetric positions about the central axis Ax.
　接続部１１２は、係合部１１１における先端側Ａｒ１の端部と露出部１１３における基端側Ａｒ２の端部とを接続する部分であり、中心軸Ａｘを囲む略円筒形状を有する。この接続部１１２において、係合部１１１と接続する基端側Ａｒ２の端部は、係合部１１１よりも外径寸法が大きい。すなわち、キャップ１１の外周面において、接続部１１２と係合部１１１との間には、第１の段差部１１４（図４～図７）が設けられている。
　ここで、係合部１１１の外周面には、膨出するとともに、第１の段差部１１４から基端側Ａｒ２に向けて延在した位置決め部１１１３（図４，図６，図７）が設けられている。 The connecting portion 112 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 111 and the end portion of the proximal end side Ar2 in the exposed portion 113, and has a substantially cylindrical shape surrounding the central axis Ax. In the connecting portion 112, the end portion of the base end side Ar2 connected to the engaging portion 111 has a larger outer diameter than the engaging portion 111. That is, on the outer peripheral surface of the cap 11, a first step portion 114 (FIGS. 4 to 7) is provided between the connecting portion 112 and the engaging portion 111.
Here, on the outer peripheral surface of the engaging portion 111, a positioning portion 1113 (FIGS. 4, FIG. 6, FIG. 7) that bulges and extends from the first step portion 114 toward the proximal end side Ar2 is provided. Has been done.
　また、接続部１１２の外周面は、図４ないし図７に示すように、第１の傾斜面１１２１と第１の先端外周面１１２２とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　第１の傾斜面１１２１は、第１の段差部１１４に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　第１の先端外周面１１２２は、第１の傾斜面１１２１に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。 Further, as shown in FIGS. 4 to 7, the outer peripheral surface of the connecting portion 112 is such that the first inclined surface 1121 and the first tip outer peripheral surface 1122 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of things.
The first inclined surface 1121 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the first step portion 114.
The first tip outer peripheral surface 1122 is a surface extending linearly from a position in contact with the first inclined surface 1121 toward the tip side Ar1 along the central axis Ax.
　露出部１１３は、中心軸Ａｘを囲む略円筒形状を有し、接続部１１２における先端側Ａｒ１の端部に設けられている。この露出部１１３において、接続部１１２と接続する基端側Ａｒ２の端部は、第１の先端外周面１１２２よりも外径寸法が大きい。すなわち、キャップ１１の外周面において、露出部１１３と接続部１１２との間には、第２の段差部１１５（図４～図７）が設けられている。そして、露出部１１３の外周面は、当該露出部１１３の径方向の外側に向かって張り出した張出面１１３１を有する。この張出面１１３１は、第２の段差部１１５に接する面であるとともに、本発明に係る張出部に相当する。 The exposed portion 113 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the connecting portion 112. In the exposed portion 113, the end portion of the proximal end side Ar2 connected to the connecting portion 112 has a larger outer diameter than the first outer peripheral surface 1122. That is, on the outer peripheral surface of the cap 11, a second step portion 115 (FIGS. 4 to 7) is provided between the exposed portion 113 and the connecting portion 112. The outer peripheral surface of the exposed portion 113 has an overhanging surface 1131 that projects outward in the radial direction of the exposed portion 113. The overhanging surface 1131 is a surface in contact with the second step portion 115 and corresponds to the overhanging portion according to the present invention.
　また、露出部１１３の外周面は、図４ないし図７に示すように、張出面１１３１と第２の傾斜面１１３２と第２の先端外周面１１３３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　張出面１１３１は、第２の段差部１１５に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　第２の傾斜面１１３２は、張出面１１３１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　第２の先端外周面１１３３は、第２の傾斜面１１３２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて略直線状に延在した面である。 Further, as shown in FIGS. 4 to 7, the outer peripheral surface of the exposed portion 113 has the overhanging surface 1131, the second inclined surface 1132, and the second tip outer peripheral surface 1133 directed from the proximal end side Ar2 to the distal end side Ar1. It is configured by being connected in series.
The overhanging surface 1131 is a surface extending linearly from a position in contact with the second step portion 115 toward the tip end side Ar1 along the central axis Ax.
The second inclined surface 1132 is a surface whose diameter dimension decreases toward the tip end side Ar1 from the position in contact with the overhanging surface 1131.
The second tip outer peripheral surface 1133 is a surface extending substantially linearly from a position in contact with the second inclined surface 1132 toward the tip side Ar1 along the central axis Ax.
　ここで、第２の先端外周面１１３３を有する先端部１１０（図４～図７）における外径寸法は、キャップ１１の基端部である係合部１１１における外径寸法よりも小さい。また、先端部１１０における外径寸法は、図４に示すように、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１１０は、細径化によって、処置具本体４を使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 110 (FIGS. 4 to 7) having the second tip outer peripheral surface 1133 is smaller than the outer diameter dimension of the engaging portion 111 which is the base end portion of the cap 11. Further, as shown in FIG. 4, the outer diameter dimension of the tip portion 110 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3. The tip portion 110 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4 by reducing the diameter.
　以上説明したキャップ１１には、第１の方向Ａｒ３における一端側（図６，図７中、下方側）に、第１のスリット１１６（図６）と、第２のスリット１１７（図７）とが設けられている。これら第１，第２のスリット１１６，１１７は、本発明に係るスリットに相当する。
　第１のスリット１１６は、キャップ１１の先端から張出面１１３１の手前まで中心軸Ａｘに沿って直線状に切り欠かれたスリットである。
　第２のスリット１１７は、キャップ１１の基端から第１の先端外周面１１２２の手前まで中心軸Ａｘに沿って直線状に切り欠かれたスリットである。
　これら第１，第２のスリット１１６，１１７の幅寸法は、フック部１０１２における第２の方向Ａｒ４の外形寸法よりも若干大きい。 The cap 11 described above has a first slit 116 (FIG. 6) and a second slit 117 (FIG. 7) on one end side (lower side in FIGS. 6 and 7) in the first direction Ar3. Is provided. These first and second slits 116 and 117 correspond to the slits according to the present invention.
The first slit 116 is a slit cut out linearly along the central axis Ax from the tip of the cap 11 to the front of the overhanging surface 1131.
The second slit 117 is a slit cut out linearly along the central axis Ax from the base end of the cap 11 to the front side of the first outer peripheral surface 1122.
The width dimension of these first and second slits 116 and 117 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
　最後に、シース８における先端側Ａｒ１の端部の構造について説明する。
　シース８における先端側Ａｒ１の端部には、外周面から内周面に向けてそれぞれ貫通し、一対の爪部１１１２がそれぞれ係止される一対の係止用開口部８１１（図４，図５）が設けられている。
　また、シース８には、先端から基端側Ａｒ２に向けて切り欠かれ、位置決め部１１１３が挿通される位置決め用切欠き部８１２（図４）が設けられている。 Finally, the structure of the end portion of the distal end side Ar1 in the sheath 8 will be described.
A pair of locking openings 811 (FIGS. 4 and 5) penetrating the end of the distal end side Ar1 of the sheath 8 from the outer peripheral surface toward the inner peripheral surface and locking the pair of claw portions 1112, respectively (FIGS. 4 and 5). ) Is provided.
Further, the sheath 8 is provided with a positioning cutout portion 812 (FIG. 4) that is cut out from the tip end toward the proximal end side Ar2 and through which the positioning portion 1113 is inserted.
　そして、シース８等の外周面には、チューブＴＵ（図４，図５）が取り付けられる。
　このチューブＴＵは、電気絶縁性を有する樹脂材料によって構成された熱収縮チューブである。 A tube TU (FIGS. 4 and 5) is attached to the outer peripheral surface of the sheath 8 or the like.
This tube TU is a heat-shrinkable tube made of a resin material having electrical insulation.
　〔処置具の製造方法〕
　次に、処置具２の製造方法について説明する。
　図８は、処置具２の製造方法を示すフローチャートである。図９ないし図１６は、処置具２の製造方法を説明する図である。なお、図１２ないし図１６は、フック部１０１２の突端（図１２～図１６中、下方側の端部）と中心軸Ａｘとを含む平面にて振動伝達部材１０等を切断した断面図である。
　先ず、作業者は、図９に示すように、シース８における基端側Ａｒ２の端部を保持部９の先端側Ａｒ１から当該保持部９の内部に挿通する（ステップＳ１）。これによって、図１０に示すように、シース８は、保持部９に対して取り付けられる。 [Manufacturing method of treatment tool]
Next, a method for manufacturing the treatment tool 2 will be described.
FIG. 8 is a flowchart showing a method of manufacturing the treatment tool 2. 9 to 16 are views illustrating a method for manufacturing the treatment tool 2. 12 to 16 are cross-sectional views of the vibration transmitting member 10 and the like cut along a plane including the tip of the hook portion 1012 (the lower end in FIGS. 12 to 16) and the central axis Ax. ..
First, as shown in FIG. 9, the operator inserts the end portion of the proximal end side Ar2 of the sheath 8 from the distal end side Ar1 of the holding portion 9 into the inside of the holding portion 9 (step S1). Thereby, as shown in FIG. 10, the sheath 8 is attached to the holding portion 9.
　ステップＳ１の後、作業者は、図１１に示すように、振動伝達部材１０における先端側Ａｒ１の端部を保持部９の基端側Ａｒ２から当該保持部９及びシース８の内部に挿通する（ステップＳ２）。これによって、振動伝達部材１０は、エンドエフェクタ１０１がシース８の先端側Ａｒ１から突出した状態で、保持部９に対して取り付けられる。 After step S1, as shown in FIG. 11, the operator inserts the end portion of the distal end side Ar1 of the vibration transmission member 10 from the proximal end side Ar2 of the holding portion 9 into the holding portion 9 and the sheath 8. Step S2). As a result, the vibration transmission member 10 is attached to the holding portion 9 with the end effector 101 protruding from the tip end side Ar1 of the sheath 8.
　ステップＳ２の後、作業者は、以下に示すように、シース８に対してキャップ１１を取り付ける（ステップＳ３）。
　先ず、作業者は、第１，第２のスリット１１６，１１７を図１２中、下方側（フック部１０１２の突端側）に位置付けるとともに、キャップ１１を先端側Ａｒ１が基端側Ａｒ２に対して図１２中、下方側に位置する姿勢で傾斜させる。そして、作業者は、当該姿勢のキャップ１１における第２のスリット１１７から当該キャップ１１の内部にフック部１０１２を挿通する。 After step S2, the operator attaches the cap 11 to the sheath 8 as shown below (step S3).
First, the operator positions the first and second slits 116 and 117 on the lower side (the tip side of the hook portion 1012) in FIG. 12, and the cap 11 is shown so that the tip side Ar1 is relative to the base end side Ar2. In the middle of 12, it is tilted in a posture located on the lower side. Then, the operator inserts the hook portion 1012 from the second slit 117 in the cap 11 in the posture into the inside of the cap 11.
　次に、作業者は、図１３、図１４、及び図１５に示すように、キャップ１１を回転させ、第２のスリット１１７から当該キャップ１１の内部に柱状部１０１１を挿通する。これによって、フック部１０１２における突端は、第１のスリット１１６からキャップ１１の外部に突出する。すなわち、第１，第２のスリット１１６，１１７は、エンドエフェクタ１０１との干渉を防止するために設けられたスリットである。
　次に、作業者は、図１６に示すように、キャップ１１を基端側Ａｒ２に向けて移動させ、位置決め用切欠き部８１２に対して位置決め部１１１３を挿通しつつ、係合部１１１をシース８の内部に挿通する。これによって、フック部１０１２は、キャップ１１から先端側Ａｒ１に突出した状態となる。そして、キャップ１１は、爪部１１１２が係止用開口部８１１に対して係止することによって、シース８に対して取り付けられる。すなわち、キャップ１１は、スナップフィット方式によって、シース８に対して取り付けられる。 Next, as shown in FIGS. 13, 14, and 15, the operator rotates the cap 11 and inserts the columnar portion 1011 from the second slit 117 into the inside of the cap 11. As a result, the tip of the hook portion 1012 projects from the first slit 116 to the outside of the cap 11. That is, the first and second slits 116 and 117 are slits provided to prevent interference with the end effector 101.
Next, as shown in FIG. 16, the operator moves the cap 11 toward the base end side Ar2, inserts the positioning portion 1113 through the positioning notch 812, and sheaths the engaging portion 111. Insert into the inside of 8. As a result, the hook portion 1012 is in a state of protruding from the cap 11 to the tip side Ar1. Then, the cap 11 is attached to the sheath 8 by locking the claw portion 1112 to the locking opening 811. That is, the cap 11 is attached to the sheath 8 by the snap-fit method.
　ステップＳ３の後、作業者は、チューブＴＵの基端側Ａｒ２から当該チューブＴＵの内部にエンドエフェクタ１０１と、キャップ１１と、シース８と、保持部９における先端側Ａｒ１の端部とを挿通する。そして、作業者は、当該チューブＴＵに対して熱を加えることによって、当該チューブＴＵの径方向に当該チューブＴＵを収縮させる（ステップＳ４）。
　ここで、チューブＴＵの先端は、図４または図５に示すように、張出面１１３１と第１の傾斜面１１２１との間、すなわち、第１の先端外周面１１２２上に位置する。そして、本実施の形態１では、張出面１１３１における径寸法は、図４に示すように、チューブＴＵの先端における外径寸法と略同一である。また、張出面１１３１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　また、チューブＴＵの基端は、図２の拡大図に示すように、保持部９における先端側Ａｒ１の端部の外周面上に位置する。すなわち、シース８と保持部９との隙間は、チューブＴＵによって保護されている。
　以上のように、チューブＴＵは、シース８とキャップ１１との境界を跨いでシース８の外周面とキャップ１１の外周面とをそれぞれ覆う位置に設けられている。また、シース８及びキャップ１１において、係合部１１１及び第１の傾斜面１１２１の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。すなわち、第１の傾斜面１１２１は、本発明に係る縮径部に相当する。 After step S3, the operator inserts the end effector 101, the cap 11, the sheath 8, and the end portion of the distal end side Ar1 in the holding portion 9 from the proximal end side Ar2 of the tube TU into the inside of the tube TU. .. Then, the operator applies heat to the tube TU to contract the tube TU in the radial direction of the tube TU (step S4).
Here, the tip of the tube TU is located between the overhanging surface 1131 and the first inclined surface 1121, that is, on the first tip outer peripheral surface 1122, as shown in FIG. 4 or FIG. Then, in the first embodiment, the diameter dimension on the overhanging surface 1131 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. Further, the diameter dimension of the overhanging surface 1131 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
Further, the base end of the tube TU is located on the outer peripheral surface of the end portion of the distal end side Ar1 in the holding portion 9, as shown in the enlarged view of FIG. That is, the gap between the sheath 8 and the holding portion 9 is protected by the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8 and the cap 11 and covers the outer peripheral surface of the sheath 8 and the outer peripheral surface of the cap 11, respectively. Further, in the sheath 8 and the cap 11, the engaging portion 111 and the portion of the first inclined surface 1121 correspond to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the first inclined surface 1121 corresponds to the reduced diameter portion according to the present invention.
　以上説明した本実施の形態１によれば、以下の効果を奏する。
　本実施の形態１に係る処置具２は、シース８とキャップ１１との境界を跨いでシース８の外周面とキャップ１１の外周面とをそれぞれ覆う位置に設けられ、中心軸Ａｘに直交する径方向に収縮するチューブＴＵを備える。すなわち、キャップ１１は、チューブＴＵの収縮力によって締め付けられた状態となっている。
　したがって、本実施の形態１に係る処置具２によれば、シース８からのキャップ１１の脱落を抑制することができる。 According to the first embodiment described above, the following effects are obtained.
The treatment tool 2 according to the first embodiment is provided at a position that straddles the boundary between the sheath 8 and the cap 11 and covers the outer peripheral surface of the sheath 8 and the outer peripheral surface of the cap 11, respectively, and has a diameter orthogonal to the central axis Ax. A tube TU that contracts in the direction is provided. That is, the cap 11 is in a state of being tightened by the contraction force of the tube TU.
Therefore, according to the treatment tool 2 according to the first embodiment, it is possible to prevent the cap 11 from falling off from the sheath 8.
　また、キャップ１１は、係合部１１１によって、スナップフィット方式でシース８に対して取り付けられる。このため、シース８に対してキャップ１１を容易に取り付けることができる。そして、チューブＴＵは、当該係合部１１１の部分であるオーバーラップ領域を覆う。このため、チューブＴＵによって当該オーバーラップ領域を保護し、当該オーバーラップ領域に対して外力が加わった場合であっても、シース８に対するキャップ１１の係合状態を良好に維持することができる。すなわち、シース８からのキャップ１１の脱落を効果的に抑制することができる。 Further, the cap 11 is attached to the sheath 8 by the engaging portion 111 by a snap-fit method. Therefore, the cap 11 can be easily attached to the sheath 8. Then, the tube TU covers the overlap region which is a portion of the engaging portion 111. Therefore, the overlap region can be protected by the tube TU, and the engagement state of the cap 11 with the sheath 8 can be well maintained even when an external force is applied to the overlap region. That is, it is possible to effectively suppress the cap 11 from falling off from the sheath 8.
　さらに、チューブＴＵは、第１の傾斜面１１２１を覆う。このため、当該第１の傾斜面１１２１がチューブＴＵに対して引っ掛かる構造となっており、シース８からのキャップ１１の脱落を効果的に抑制することができる。
　なお、チューブＴＵに対して引っ掛かる構造であれば、傾斜面に限定されるものではない。例えば、先端側Ａｒ１が基端側Ａｒ２よりも径方向の寸法が小さい段差となっていてもよい。 Further, the tube TU covers the first inclined surface 1121. Therefore, the structure is such that the first inclined surface 1121 is caught on the tube TU, and the cap 11 can be effectively suppressed from falling off from the sheath 8.
The structure is not limited to the inclined surface as long as it is a structure that is hooked on the tube TU. For example, the tip side Ar1 may be a step having a smaller radial dimension than the base end side Ar2.
　また、張出面１１３１における径寸法は、チューブＴＵの先端における外径寸法と略同一である。このため、キャップ１１の外周面とチューブＴＵの外周面とを段差のない面一で接続する構造とすることができる。すなわち、当該段差に何かが引っ掛かることによって、シース８からキャップ１１が脱落してしまうことがない。また、チューブＴＵの先端に何かが引っ掛かることによって、チューブＴＵが捲れ上がってしまうことがない。 Further, the diameter dimension on the overhanging surface 1131 is substantially the same as the outer diameter dimension at the tip of the tube TU. Therefore, the outer peripheral surface of the cap 11 and the outer peripheral surface of the tube TU can be connected flush with each other without a step. That is, the cap 11 does not fall off from the sheath 8 due to something being caught on the step. Further, the tube TU does not roll up due to something being caught on the tip of the tube TU.
　さらに、キャップ１１は、電気絶縁性の樹脂材料によって構成されている。このため、キャップ１１の先端までチューブＴＵによって覆う必要がない。すなわち、当該先端部分がチューブＴＵによって覆わないため、当該先端部分を細径化することができ、処置具本体４を使用する術者等の視野を確保することができる。
　また、キャップ１１の外周面は、張出面１１３１からキャップ１１の先端に向かうにしたがって、径方向の寸法が小さくなる。このため、上記同様に、細径化によって、処置具本体４を使用する術者等の視野を確保することができる。 Further, the cap 11 is made of an electrically insulating resin material. Therefore, it is not necessary to cover the tip of the cap 11 with the tube TU. That is, since the tip portion is not covered by the tube TU, the diameter of the tip portion can be reduced, and the field of view of the operator or the like using the treatment tool main body 4 can be secured.
Further, the outer peripheral surface of the cap 11 becomes smaller in radial dimension from the overhanging surface 1131 toward the tip of the cap 11. Therefore, similarly to the above, the field of view of the operator or the like who uses the treatment tool main body 4 can be secured by reducing the diameter.
　さらに、キャップ１１には、第１，第２のスリット１１６，１１７が設けられている。このため、エンドエフェクタ１０１との干渉を防止しつつ、キャップ１１の内部にエンドエフェクタ１０１を挿通することができる。
　特に、第１，第２のスリット１１６，１１７は、キャップ１１の先端から基端まで貫通したスリットではない。このため、キャップ１１の強度が必要以上に低下することを防止することができる。また、キャップ１１が必要以上に変形することを防止することができるため、変形によるキャップ１１の脱落を防止することができる。 Further, the cap 11 is provided with first and second slits 116 and 117. Therefore, the end effector 101 can be inserted into the cap 11 while preventing interference with the end effector 101.
In particular, the first and second slits 116 and 117 are not slits penetrating from the tip end to the base end of the cap 11. Therefore, it is possible to prevent the strength of the cap 11 from being lowered more than necessary. Further, since the cap 11 can be prevented from being deformed more than necessary, it is possible to prevent the cap 11 from falling off due to the deformation.
（実施の形態２）
　次に、本実施の形態２について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態２では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（シース８及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態２に係る処置具２を処置具２Ａと記載する。また、本実施の形態２に係る処置具本体４を処置具本体４Ａと記載する。さらに、本実施の形態２に係るシース８をシース８Ａと記載する。また、本実施の形態２に係るキャップ１１をキャップ１１Ａと記載する。 (Embodiment 2)
Next, the second embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the second embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the second embodiment will be referred to as the treatment tool 2A. Further, the treatment tool main body 4 according to the second embodiment is referred to as a treatment tool main body 4A. Further, the sheath 8 according to the second embodiment is referred to as a sheath 8A. Further, the cap 11 according to the second embodiment is referred to as a cap 11A.
　図１７ないし図１９は、実施の形態２に係る処置具本体４Ａの先端部分を示す図である。具体的に、図１７及び図１８は、処置具本体４Ａの先端部分の外観を示す図である。なお、図１７ではチューブＴＵを取り外した状態としているのに対して、図１８ではチューブＴＵを取り付けた状態としている。図１９は、フック部１０１２の突端と中心軸Ａｘとを含む平面によって処置具本体４Ａの先端部分を切断した断面図である。
　キャップ１１Ａは、電気絶縁性を有するＰＥＥＫ等の樹脂材料によって構成されている。このキャップ１１Ａは、図１７ないし図１９に示すように、係合部１２１と、露出部１２２とを備える。 17 to 19 are views showing a tip portion of the treatment tool main body 4A according to the second embodiment. Specifically, FIGS. 17 and 18 are views showing the appearance of the tip portion of the treatment tool main body 4A. In FIG. 17, the tube TU is removed, whereas in FIG. 18, the tube TU is attached. FIG. 19 is a cross-sectional view in which the tip portion of the treatment tool main body 4A is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
The cap 11A is made of a resin material such as PEEK having electrical insulation. As shown in FIGS. 17 to 19, the cap 11A includes an engaging portion 121 and an exposed portion 122.
　係合部１２１は、図１７または図１９に示すように、係合部本体１２１１と、一対の腕部１２１２とを備える。
　係合部本体１２１１は、中心軸Ａｘと同軸となる円筒形状を有する。本実施の形態２では、係合部本体１２１１の内径寸法は、シース８Ａの外径寸法よりも若干大きい。
　一対の腕部１２１２は、係合部本体１２１１における基端から互いに対向しつつ基端側Ａｒ２に向けてそれぞれ突出し、先端側Ａｒ１の基部を基点として互いに近接離間する方向に弾性変形可能とする。これら一対の腕部１２１２において、互いに対向する面の基端側Ａｒ２には、凸部１２１３（図１７）がそれぞれ設けられている。 As shown in FIG. 17 or FIG. 19, the engaging portion 121 includes an engaging portion main body 1211 and a pair of arm portions 1212.
The engaging portion main body 1211 has a cylindrical shape coaxial with the central axis Ax. In the second embodiment, the inner diameter of the engaging portion main body 1211 is slightly larger than the outer diameter of the sheath 8A.
The pair of arm portions 1212 project from the base end of the engaging portion main body 1211 toward the base end side Ar2 while facing each other, and are elastically deformable in a direction in which they are close to each other with the base portion of the tip end side Ar1 as the base point. In these pair of arm portions 1212, convex portions 1213 (FIG. 17) are provided on the proximal end side Ar2 of the surfaces facing each other.
　露出部１２２は、中心軸Ａｘを囲む略円筒形状を有し、係合部本体１２１１における先端側Ａｒ１の端部に設けられている。本実施の形態２では、露出部１２２における内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。この露出部１２２において、係合部本体１２１１と接続する基端側Ａｒ２の端部は、当該係合部本体１２１１よりも外径寸法が大きい。すなわち、キャップ１１Ａの外周面において、露出部１２２と係合部本体１２１１との間には、段差部１２３（図１７～図１９）が設けられている。そして、露出部１２２の外周面は、当該露出部１２２の径方向の外側に向かって張り出した張出面１２２１を有する。この張出面１２２１は、段差部１２３に接する面であるとともに、本発明に係る張出部に相当する。 The exposed portion 122 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the engaging portion main body 1211. In the second embodiment, the inner diameter dimension of the exposed portion 122 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012. In the exposed portion 122, the end portion of the base end side Ar2 connected to the engaging portion main body 1211 has a larger outer diameter than the engaging portion main body 1211. That is, on the outer peripheral surface of the cap 11A, a step portion 123 (FIGS. 17 to 19) is provided between the exposed portion 122 and the engaging portion main body 1211. The outer peripheral surface of the exposed portion 122 has an overhanging surface 1221 that projects outward in the radial direction of the exposed portion 122. The overhanging surface 1221 is a surface in contact with the stepped portion 123 and corresponds to the overhanging portion according to the present invention.
　また、露出部１２２の外周面は、図１７ないし図１９に示すように、張出面１２２１と傾斜面１２２２と先端外周面１２２３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　張出面１２２１は、段差部１２３に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　傾斜面１２２２は、張出面１２２１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　先端外周面１２２３は、傾斜面１２２２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。 Further, on the outer peripheral surface of the exposed portion 122, as shown in FIGS. 17 to 19, the overhanging surface 1221, the inclined surface 1222, and the tip outer peripheral surface 1223 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of.
The overhanging surface 1221 is a surface extending linearly from a position in contact with the step portion 123 toward the tip end side Ar1 along the central axis Ax.
The inclined surface 1222 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the overhanging surface 1221.
The tip outer peripheral surface 1223 is a surface extending linearly from a position in contact with the inclined surface 1222 toward the tip side Ar1 along the central axis Ax.
　ここで、先端外周面１２２３を有する先端部１２０（図１７～図１９）における外径寸法は、キャップ１１Ａの基端部である係合部本体１２１１における外径寸法よりも小さい。また、先端部１２０における外径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１２０は、細径化によって、処置具本体４Ａを使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 120 (FIGS. 17 to 19) having the tip outer peripheral surface 1223 is smaller than the outer diameter dimension of the engaging portion main body 1211 which is the base end portion of the cap 11A. Further, the outer diameter dimension of the tip portion 120 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3. The tip portion 120 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4A by reducing the diameter.
　以上説明したキャップ１１Ａには、第１の方向Ａｒ３における一端側に、先端から基端まで中心軸Ａｘに沿って直線状に切り欠かれたスリット１２４（図１７，図１８）が設けられている。
　このスリット１２４の幅寸法は、フック部１０１２における第２の方向Ａｒ４の外形寸法よりも若干大きい。 The cap 11A described above is provided with a slit 124 (FIGS. 17 and 18) linearly cut out along the central axis Ax from the tip end to the base end on one end side in the first direction Ar3. ..
The width dimension of the slit 124 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
　シース８Ａにおける先端側Ａｒ１の端部には、図１７に示すように、側壁部分が加工されることによって、一対の平坦部８２１が設けられている。
　一対の平坦部８２１は、シース８Ａにおける先端から基端側Ａｒ２に向けてそれぞれ延在し、互いに平行となる平板状の部分である。これら一対の平坦部８２１における外面同士の離間寸法は、一対の腕部１２１２における互いに対向する面同士の離間寸法と略同一である。そして、これら一対の平坦部８２１には、表裏をそれぞれ貫通し、一対の凸部１２１３がそれぞれ係止される一対の係止用開口部８２２（図１７）がそれぞれ設けられている。 As shown in FIG. 17, a pair of flat portions 821 are provided at the end portion of the distal end side Ar1 in the sheath 8A by processing a side wall portion.
The pair of flat portions 821 are flat plate-shaped portions extending from the tip end of the sheath 8A toward the proximal end side Ar2 and parallel to each other. The distance between the outer surfaces of the pair of flat portions 821 is substantially the same as the distance between the surfaces facing each other in the pair of arm portions 1212. Each of the pair of flat portions 821 is provided with a pair of locking openings 822 (FIG. 17) that penetrate the front and back surfaces and lock the pair of convex portions 1213.
　なお、本実施の形態２に係る処置具２Ａの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態２に係るステップＳ３では、作業者は、スリット１２４内にフック部１０１２の突端が入り込む状態で、キャップ１１Ａの基端側Ａｒ２から当該キャップ１１Ａの内部にエンドエフェクタ１０１を挿通する。そして、作業者は、フック部１０１２をキャップ１１Ａの先端側Ａｒ１から突出させる。また、作業者は、キャップ１１Ａを基端側Ａｒ２に移動させ、一対の凸部１２１３を一対の平坦部８２１の外面上で摺動させつつ、係合部本体１２１１の内部にシース８Ａの先端側Ａｒ１の端部を挿通する。そして、キャップ１１Ａは、凸部１２１３が係止用開口部８２２に対して係止することによって、シース８Ａに対して取り付けられる。すなわち、キャップ１１Ａは、スナップフィット方式によって、シース８Ａに対して取り付けられる。 In the method for manufacturing the treatment tool 2A according to the second embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S3 according to the second embodiment, the operator inserts the end effector 101 from the base end side Ar2 of the cap 11A into the inside of the cap 11A with the tip of the hook portion 1012 inserted into the slit 124. Then, the operator causes the hook portion 1012 to protrude from the tip end side Ar1 of the cap 11A. Further, the operator moves the cap 11A to the base end side Ar2, slides the pair of convex portions 1213 on the outer surface of the pair of flat portions 821, and inside the engaging portion main body 1211 on the tip end side of the sheath 8A. Insert the end of Ar1. Then, the cap 11A is attached to the sheath 8A by locking the convex portion 1213 to the locking opening 822. That is, the cap 11A is attached to the sheath 8A by a snap-fit method.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図１９に示すように、係合部本体１２１１の外周面上に位置する。本実施の形態２では、張出面１２２１における径寸法は、図１９に示すように、チューブＴＵの先端における外径寸法と略同一である。また、張出面１２２１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８Ａとキャップ１１Ａとの境界を跨いでシース８Ａの外周面とキャップ１１Ａの外周面とをそれぞれ覆う位置に設けられている。また、シース８Ａ及びキャップ１１Ａにおいて、係合部１２１の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the engaging portion main body 1211 as shown in FIG. In the second embodiment, the diameter dimension of the overhanging surface 1221 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. Further, the diameter dimension of the overhanging surface 1221 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8A and the cap 11A and covers the outer peripheral surface of the sheath 8A and the outer peripheral surface of the cap 11A, respectively. Further, in the sheath 8A and the cap 11A, the portion of the engaging portion 121 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
　以上説明した本実施の形態２に係る処置具本体４Ａを採用した場合であっても、上述した実施の形態１と同様の効果を奏する。 Even when the treatment tool main body 4A according to the second embodiment described above is adopted, the same effect as that of the first embodiment described above is obtained.
（実施の形態３）
　次に、本実施の形態３について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態３では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（シース８及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態３に係る処置具２を処置具２Ｂと記載する。また、本実施の形態３に係る処置具本体４を処置具本体４Ｂと記載する。さらに、本実施の形態３に係るシース８をシース８Ｂと記載する。また、本実施の形態３に係るキャップ１１をキャップ１１Ｂと記載する。 (Embodiment 3)
Next, the third embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the third embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the third embodiment will be referred to as the treatment tool 2B. Further, the treatment tool main body 4 according to the third embodiment is referred to as a treatment tool main body 4B. Further, the sheath 8 according to the third embodiment is referred to as a sheath 8B. Further, the cap 11 according to the third embodiment is referred to as a cap 11B.
　図２０ないし図２２は、実施の形態３に係る処置具本体４Ｂの先端部分を示す図である。具体的に、図２０及び図２１は、処置具本体４Ｂの先端部分の外観を示す図である。なお、図２０ではチューブＴＵを取り外した状態としているのに対して、図２１ではチューブＴＵを取り付けた状態としている。図２２は、フック部１０１２の突端と中心軸Ａｘとを含む平面によって処置具本体４Ｂの先端部分を切断した断面図である。
　キャップ１１Ｂは、電気絶縁性を有するＰＴＦＥ（ポリテトラフルオロエチレン）またはＰＦＡ（テトラフルオロエチレン・パーフルオロアルキルビニルエーテル共重合体）等の樹脂材料によって構成されている。このキャップ１１Ｂは、図２０ないし図２２に示すように、係合部１３１と、露出部１３２とを備える。 20 to 22 are views showing a tip portion of the treatment tool main body 4B according to the third embodiment. Specifically, FIGS. 20 and 21 are views showing the appearance of the tip portion of the treatment tool main body 4B. In FIG. 20, the tube TU is removed, whereas in FIG. 21, the tube TU is attached. FIG. 22 is a cross-sectional view in which the tip portion of the treatment tool main body 4B is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
The cap 11B is made of a resin material such as PTFE (polytetrafluoroethylene) or PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) having electrical insulating properties. As shown in FIGS. 20 to 22, the cap 11B includes an engaging portion 131 and an exposed portion 132.
　係合部１３１は、中心軸Ａｘと同軸となる円筒形状を有する。本実施の形態３では、係合部１３１の外径寸法は、シース８Ｂにおける先端側Ａｒ１の端部の外径寸法よりも若干大きい。また、係合部１３１の内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも若干大きい。
　この係合部１３１には、図２０に示すように、外周面から内周面に向けてそれぞれ貫通した一対の切欠き部１３１１が設けられている。これら一対の切欠き部１３１１は、Ｕ字形状をそれぞれ有する。そして、切欠き部１３１１におけるＵ字状の内側には、基端側Ａｒ２から先端側Ａｒ１に向けて延在し、当該基端側Ａｒ２の基部を基点として係合部１３１の径方向に弾性変形可能とする爪部１３１２が形成される。ここで、一対の切欠き部１３１１（一対の爪部１３１２）は、中心軸Ａｘを中心とする１８０°の回転対称位置に設けられている。 The engaging portion 131 has a cylindrical shape coaxial with the central axis Ax. In the third embodiment, the outer diameter dimension of the engaging portion 131 is slightly larger than the outer diameter dimension of the end portion of the distal end side Ar1 in the sheath 8B. Further, the inner diameter of the engaging portion 131 is slightly larger than the outer dimension of the first direction Ar3 in the hook portion 1012.
As shown in FIG. 20, the engaging portion 131 is provided with a pair of notched portions 1311 penetrating from the outer peripheral surface to the inner peripheral surface. Each of these pair of notch portions 1311 has a U-shape. Then, inside the U-shape of the notch 1311, it extends from the proximal end side Ar2 toward the distal end side Ar1, and is elastically deformed in the radial direction of the engaging portion 131 with the base portion of the proximal end side Ar2 as a base point. The claw portion 1312 that enables it is formed. Here, the pair of notch portions 1311 (pair of claw portions 1312) are provided at 180 ° rotationally symmetric positions about the central axis Ax.
　露出部１３２は、中心軸Ａｘを囲む略円筒形状を有し、係合部１３１における先端側Ａｒ１の端部に設けられている。この露出部１３２において、係合部１３１と接続する基端側Ａｒ２の端部は、当該係合部１３１よりも外径寸法が大きい。すなわち、キャップ１１Ｂの外周面において、露出部１３２と係合部１３１との間には、段差部１３３（図２０～図２２）が設けられている。そして、露出部１３２の外周面は、当該露出部１３２の径方向の外側に向かって張り出した張出面１３２１を有する。この張出面１３２１は、段差部１３３に接する面であるとともに、本発明に係る張出部に相当する。 The exposed portion 132 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the engaging portion 131. In the exposed portion 132, the end portion of the base end side Ar2 connected to the engaging portion 131 has a larger outer diameter than the engaging portion 131. That is, on the outer peripheral surface of the cap 11B, a step portion 133 (FIGS. 20 to 22) is provided between the exposed portion 132 and the engaging portion 131. The outer peripheral surface of the exposed portion 132 has an overhanging surface 1321 protruding outward in the radial direction of the exposed portion 132. The overhanging surface 1321 is a surface in contact with the stepped portion 133 and corresponds to the overhanging portion according to the present invention.
　また、露出部１３２の外周面は、図２０ないし図２２に示すように、張出面１３２１と傾斜面１３２２と先端外周面１３２３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　張出面１３２１は、段差部１３３に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　傾斜面１３２２は、張出面１３２１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　先端外周面１３２３は、傾斜面１３２２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　本実施の形態３では、露出部１３２における先端側Ａｒ１の端部の内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。 Further, on the outer peripheral surface of the exposed portion 132, as shown in FIGS. 20 to 22, the overhanging surface 1321, the inclined surface 1322, and the tip outer peripheral surface 1323 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of.
The overhanging surface 1321 is a surface extending linearly from a position in contact with the step portion 133 toward the tip end side Ar1 along the central axis Ax.
The inclined surface 1322 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the overhanging surface 1321.
The tip outer peripheral surface 1323 is a surface extending linearly from a position in contact with the inclined surface 1322 toward the tip side Ar1 along the central axis Ax.
In the third embodiment, the inner diameter dimension of the end portion of the tip side Ar1 in the exposed portion 132 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
　ここで、先端外周面１３２３を有する先端部１３０（図２０～図２２）における外径寸法は、キャップ１１Ｂの基端部である係合部１３１における外径寸法よりも小さい。また、先端部１３０における外径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１３０は、細径化によって、処置具本体４Ｂを使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 130 (FIGS. 20 to 22) having the tip outer peripheral surface 1323 is smaller than the outer diameter dimension of the engaging portion 131 which is the base end portion of the cap 11B. Further, the outer diameter dimension of the tip portion 130 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3. The tip 130 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4B by reducing the diameter.
　以上説明したキャップ１１Ｂには、第１の方向Ａｒ３における一端側に、露出部１３２の基端から先端側Ａｒ１に向けて中心軸Ａｘに沿って直線状に切り欠かれたスリット１３４（図２０～図２２）が設けられている。
　このスリット１３４の幅寸法は、フック部１０１２における第２の方向Ａｒ４の外形寸法よりも若干大きい。 The cap 11B described above has a slit 134 (FIGS. 20 to 20) cut out linearly along the central axis Ax from the base end of the exposed portion 132 toward the tip end side Ar1 on one end side in the first direction Ar3. FIG. 22) is provided.
The width dimension of the slit 134 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
　シース８Ｂにおける先端側Ａｒ１の端部は、図２０または図２２に示すように、先端側Ａｒ１に向かうにしたがって外径寸法及び内径寸法が小さくなる。本実施の形態３では、当該先端側Ａｒ１の端部の内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端側Ａｒ１の端部には、外周面から内周面まで貫通するとともにシース８Ｂの先端から基端側Ａｒ２に向けて延在し、ステップＳ２を行う際に、フック部１０１２との干渉を防止するためのスリット８３１（図２０）が設けられている。また、当該先端側Ａｒ１の端部には、外周面から内周面までそれぞれ貫通し、一対の爪部１３１２がそれぞれ係止される一対の係止用開口部（図示略）が設けられている。 As shown in FIG. 20 or 22, the outer diameter dimension and inner diameter dimension of the end portion of the tip side Ar1 in the sheath 8B becomes smaller toward the tip side Ar1. In the third embodiment, the inner diameter dimension of the end portion of the tip end side Ar1 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012. Then, the end portion of the distal end side Ar1 penetrates from the outer peripheral surface to the inner peripheral surface and extends from the distal end side of the sheath 8B toward the proximal end side Ar2, and when performing step S2, the hook portion 1012 is used. A slit 831 (FIG. 20) is provided to prevent interference. Further, a pair of locking openings (not shown) are provided at the end of the distal end side Ar1 so as to penetrate from the outer peripheral surface to the inner peripheral surface and to lock the pair of claw portions 1312 respectively. ..
　なお、本実施の形態３に係る処置具２Ｂの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態３に係るステップＳ３では、作業者は、キャップ１１Ｂの基端側Ａｒ２から当該キャップ１１Ｂの内部にエンドエフェクタ１０１を挿通する。そして、作業者は、キャップ１１ＢがＰＴＦＥまたはＰＦＡ等の比較的に柔らかい材料によって構成されているため、当該キャップ１１Ｂを変形させつつ、当該キャップ１１Ｂを基端側Ａｒ２に移動させて、フック部１０１２を当該キャップ１１Ｂの先端側Ａｒ１から突出させる。また、作業者は、係合部１３１の内部にシース８Ｂの先端側Ａｒ１の端部を挿通する。そして、キャップ１１Ｂは、爪部１３１２がシース８Ｂに設けられた係止用開口部（図示略）に対して係止することによって、シース８Ｂに対して取り付けられる。すなわち、キャップ１１Ｂは、スナップフィット方式によって、シース８Ｂに対して取り付けられる。 In the method for manufacturing the treatment tool 2B according to the third embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S3 according to the third embodiment, the operator inserts the end effector 101 from the base end side Ar2 of the cap 11B into the inside of the cap 11B. Then, since the cap 11B is made of a relatively soft material such as PTFE or PFA, the operator moves the cap 11B to the proximal end side Ar2 while deforming the cap 11B, and hooks the hook portion 1012. Is projected from Ar1 on the tip end side of the cap 11B. Further, the operator inserts the end portion of Ar1 on the distal end side of the sheath 8B into the inside of the engaging portion 131. Then, the cap 11B is attached to the sheath 8B by locking the claw portion 1312 to the locking opening (not shown) provided in the sheath 8B. That is, the cap 11B is attached to the sheath 8B by the snap-fit method.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図２１または図２２に示すように、係合部１３１の外周面上に位置する。本実施の形態３では、張出面１３２１における径寸法は、図２２に示すように、チューブＴＵの先端における外径寸法と略同一である。また、張出面１３２１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８Ｂとキャップ１１Ｂとの境界を跨いでシース８Ｂの外周面とキャップ１１Ｂの外周面とをそれぞれ覆う位置に設けられている。また、シース８Ｂ及びキャップ１１Ｂにおいて、係合部１３１の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the engaging portion 131 as shown in FIG. 21 or FIG. 22. In the third embodiment, the diameter dimension of the overhanging surface 1321 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 22. Further, the diameter dimension of the overhanging surface 1321 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8B and the cap 11B and covers the outer peripheral surface of the sheath 8B and the outer peripheral surface of the cap 11B, respectively. Further, in the sheath 8B and the cap 11B, the portion of the engaging portion 131 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
　以上説明した本実施の形態３に係る処置具本体４Ｂを採用した場合であっても、上述した実施の形態１と同様の効果を奏する。 Even when the treatment tool main body 4B according to the third embodiment described above is adopted, the same effect as that of the first embodiment described above is obtained.
（実施の形態４）
　次に、本実施の形態４について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態４では、上述した実施の形態１に対して、シース８の形状が異なる。
　なお、以下では、説明の便宜上、本実施の形態４に係るシース８をシース８Ｃと記載する。 (Embodiment 4)
Next, the fourth embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the fourth embodiment, the shape of the sheath 8 is different from that of the first embodiment described above.
In the following, for convenience of explanation, the sheath 8 according to the fourth embodiment will be referred to as a sheath 8C.
　図２３は、実施の形態４に係るシース８Ｃの形状を示す図である。
　シース８Ｃには、キャップ１１と接続する先端側Ａｒ１の端部と、保持部９と接続する基端側Ａｒ２の端部との間において、図２３に示すように、基端側Ａｒ２に向かうにしたがって外径寸法が小さくなる傾斜面８４１が設けられている。 FIG. 23 is a diagram showing the shape of the sheath 8C according to the fourth embodiment.
In the sheath 8C, as shown in FIG. 23, between the end portion of the distal end side Ar1 connected to the cap 11 and the end portion of the proximal end side Ar2 connected to the holding portion 9, the sheath 8C is directed toward the proximal end side Ar2. Therefore, an inclined surface 841 having a small outer diameter is provided.
　以上説明した本実施の形態４によれば、上述した実施の形態１と同様の効果の他、以下の効果を奏する。
　本実施の形態では、シース８Ｃに傾斜面８４１が設けられているため、当該シース８Ｃに対する先端側Ａｒ１へのチューブＴＵのずれを防止することができる。 According to the fourth embodiment described above, in addition to the same effects as those of the first embodiment described above, the following effects are obtained.
In the present embodiment, since the sheath 8C is provided with the inclined surface 841, it is possible to prevent the tube TU from shifting to the distal end side Ar1 with respect to the sheath 8C.
（実施の形態５）
　次に、本実施の形態５について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態５では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（シース８及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態５に係る処置具２を処置具２Ｄと記載する。また、本実施の形態５に係る処置具本体４を処置具本体４Ｄと記載する。さらに、本実施の形態５に係るシース８をシース８Ｄと記載する。また、本実施の形態５に係るキャップ１１をキャップ１１Ｄと記載する。 (Embodiment 5)
Next, the fifth embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the fifth embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the fifth embodiment will be referred to as the treatment tool 2D. Further, the treatment tool main body 4 according to the fifth embodiment is referred to as a treatment tool main body 4D. Further, the sheath 8 according to the fifth embodiment is referred to as a sheath 8D. Further, the cap 11 according to the fifth embodiment is referred to as a cap 11D.
　図２４ないし図２６は、実施の形態５に係る処置具本体４Ｄの先端部分を示す図である。具体的に、図２４及び図２５は、処置具本体４Ｄの先端部分の外観を示す図である。なお、図２４ではチューブＴＵを取り外した状態としているのに対して、図２５ではチューブＴＵを取り付けた状態としている。図２６は、フック部１０１２の突端と中心軸Ａｘとを含む平面によって処置具本体４Ｄの先端部分を切断した断面図である。
　キャップ１１Ｄは、電気絶縁性を有するＰＥＥＫ等の樹脂材料によって構成されている。このキャップ１１Ｄは、図２４ないし図２６に示すように、係合部１４１（図２６）と、接続部１４２（図２４，図２６）と、露出部１４３とを備える。 24 to 26 are views showing the tip portion of the treatment tool main body 4D according to the fifth embodiment. Specifically, FIGS. 24 and 25 are views showing the appearance of the tip portion of the treatment tool main body 4D. In FIG. 24, the tube TU is removed, whereas in FIG. 25, the tube TU is attached. FIG. 26 is a cross-sectional view in which the tip portion of the treatment tool main body 4D is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
The cap 11D is made of a resin material such as PEEK having electrical insulation. As shown in FIGS. 24 to 26, the cap 11D includes an engaging portion 141 (FIG. 26), a connecting portion 142 (FIGS. 24 and 26), and an exposed portion 143.
　係合部１４１は、中心軸Ａｘと同軸となる円筒形状を有する。本実施の形態５では、係合部１４１の外径寸法は、シース８Ｄの内径寸法よりも若干小さい。また、係合部１４１及び接続部１４２における各内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも若干大きい。
　この係合部１４１の外周面には、図２６に示すように、中心軸Ａｘを中心とする環形状を有し、当該中心軸Ａｘに向けて窪んだ環状凹部１４１１が設けられている。 The engaging portion 141 has a cylindrical shape coaxial with the central axis Ax. In the fifth embodiment, the outer diameter dimension of the engaging portion 141 is slightly smaller than the inner diameter dimension of the sheath 8D. Further, each inner diameter dimension of the engaging portion 141 and the connecting portion 142 is slightly larger than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
As shown in FIG. 26, the outer peripheral surface of the engaging portion 141 is provided with an annular recess 1411 having a ring shape centered on the central axis Ax and recessed toward the central axis Ax.
　接続部１４２は、係合部１４１における先端側Ａｒ１の端部と露出部１４３における基端側Ａｒ２の端部とを接続する部分であり、中心軸Ａｘを囲む略円筒形状を有する。この接続部１４２において、係合部１４１と接続する基端側Ａｒ２の端部は、係合部１４１よりも外径寸法が大きい。すなわち、キャップ１１Ｄの外周面において、接続部１４２と係合部１４１との間には、第１の段差部１４４（図２６）が設けられている。 The connecting portion 142 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 141 and the end portion of the proximal end side Ar2 in the exposed portion 143, and has a substantially cylindrical shape surrounding the central axis Ax. In this connecting portion 142, the end portion of the base end side Ar2 connected to the engaging portion 141 has a larger outer diameter than the engaging portion 141. That is, on the outer peripheral surface of the cap 11D, a first step portion 144 (FIG. 26) is provided between the connecting portion 142 and the engaging portion 141.
　また、接続部１４２の外周面は、図２６に示すように、基端外周面１４２１と第１の傾斜面１４２２と第１の先端外周面１４２３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　基端外周面１４２１は、第１の段差部１４４に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　第１の傾斜面１４２２は、基端外周面１４２１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　第１の先端外周面１４２３は、第１の傾斜面１４２２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。 Further, as shown in FIG. 26, as shown in FIG. 26, the outer peripheral surface of the connecting portion 142 has the proximal outer peripheral surface 1421, the first inclined surface 1422, and the first distal outer peripheral surface 1423 from the proximal end side Ar2 toward the distal end side Ar1. It is configured by being serially installed.
The base end outer peripheral surface 1421 is a surface extending linearly from a position in contact with the first step portion 144 toward the tip end side Ar1 along the central axis Ax.
The first inclined surface 1422 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the base end outer peripheral surface 1421.
The first tip outer peripheral surface 1423 is a surface extending linearly from a position in contact with the first inclined surface 1422 toward the tip side Ar1 along the central axis Ax.
　露出部１４３は、中心軸Ａｘを囲む略円筒形状を有し、接続部１４２における先端側Ａｒ１の端部に設けられている。この露出部１４３において、接続部１４２と接続する基端側Ａｒ２の端部は、第１の先端外周面１４２３よりも外径寸法が大きい。すなわち、キャップ１１Ｄの外周面において、露出部１４３と接続部１４２との間には、第２の段差部１４５（図２５，図２６）が設けられている。そして、露出部１４３の外周面は、当該露出部１４３の径方向の外側に向かって張り出した張出面１４３１を有する。この張出面１４３１は、第２の段差部１４５に接する面であるとともに、本発明に係る張出部に相当する。 The exposed portion 143 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the connecting portion 142. In the exposed portion 143, the end portion of the proximal end side Ar2 connected to the connecting portion 142 has a larger outer diameter than the first outer peripheral surface 1423. That is, on the outer peripheral surface of the cap 11D, a second step portion 145 (FIGS. 25 and 26) is provided between the exposed portion 143 and the connecting portion 142. The outer peripheral surface of the exposed portion 143 has an overhanging surface 1431 that projects outward in the radial direction of the exposed portion 143. The overhanging surface 1431 is a surface in contact with the second step portion 145 and corresponds to the overhanging portion according to the present invention.
　また、露出部１４３の外周面は、図２４ないし図２６に示すように、張出面１４３１と第２の傾斜面１４３２と第２の先端外周面１４３３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　張出面１４３１は、第２の段差部１４５に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　第２の傾斜面１４３２は、張出面１４３１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　第２の先端外周面１４３３は、第２の傾斜面１４３２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて略直線状に延在した面である。
　本実施の形態５では、露出部１４３における先端側Ａｒ１の端部の内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。 Further, as shown in FIGS. 24 to 26, the outer peripheral surface of the exposed portion 143 has an overhanging surface 1431, a second inclined surface 1432, and a second tip outer peripheral surface 1433 directed from the proximal end side Ar2 to the distal end side Ar1. It is configured by being connected in series.
The overhanging surface 1431 is a surface extending linearly from a position in contact with the second step portion 145 toward the tip end side Ar1 along the central axis Ax.
The second inclined surface 1432 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the overhanging surface 1431.
The second tip outer peripheral surface 1433 is a surface extending substantially linearly from a position in contact with the second inclined surface 1432 toward the tip side Ar1 along the central axis Ax.
In the fifth embodiment, the inner diameter dimension of the end portion of the tip side Ar1 in the exposed portion 143 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
　ここで、第２の先端外周面１４３３を有する先端部１４０（図２４～図２６）における外径寸法は、キャップ１１Ｄの基端部である係合部１４１における外径寸法よりも小さい。また、先端部１４０における外径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１４０は、細径化によって、処置具本体４Ｄを使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 140 (FIGS. 24 to 26) having the second tip outer peripheral surface 1433 is smaller than the outer diameter dimension of the engaging portion 141 which is the base end portion of the cap 11D. Further, the outer diameter dimension of the tip portion 140 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3. The tip portion 140 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4D by reducing the diameter.
　以上説明したキャップ１１Ｄには、第１の方向Ａｒ３における一端側に、露出部１４３の先端から基端側Ａｒ２に向けて中心軸Ａｘに沿って直線状に切り欠かれたスリット１４６（図２４～図２６）が設けられている。
　このスリット１４６の幅寸法は、フック部１０１２における第２の方向Ａｒ４の外形寸法よりも若干大きい。 The cap 11D described above has a slit 146 (FIGS. 24 to 24) cut out linearly along the central axis Ax from the tip of the exposed portion 143 toward the proximal end side Ar2 on one end side in the first direction Ar3. FIG. 26) is provided.
The width dimension of the slit 146 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
　シース８Ｄにおける先端側Ａｒ１の端部には、上述した実施の形態１において説明したシース８とは異なり、一対の係止用開口部８１１及び位置決め用切欠き部８１２が設けられていない。 Unlike the sheath 8 described in the first embodiment described above, the sheath 8D does not have a pair of locking openings 811 and a positioning notch 812 at the end of the distal end side Ar1.
　なお、本実施の形態５に係る処置具２Ｄの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態５に係るステップＳ３では、作業者は、キャップ１１Ｄの基端側Ａｒ２から当該キャップ１１Ｄの内部にエンドエフェクタ１０１を挿通する。そして、作業者は、スリット１４６内にフック部１０１２の突端を入り込ませつつ、キャップ１１Ｄを基端側Ａｒ２に移動させることによって、当該フック部１０１２を当該キャップ１１Ｄの先端側Ａｒ１から突出させる。また、作業者は、キャップ１１Ｄを基端側Ａｒ２に移動させ、係合部１４１をシース８Ｄの内部に挿通する。そして、作業者は、図示しない治具を用いて、シース８Ｄをかしめることによって当該シース８Ｄを縮径する方向に変形させ、当該変形させた部分８５１（図２４，図２６）を環状凹部１４１１に嵌合させる。これによって、キャップ１１Ｄは、シース８Ｄに対して取り付けられる。 In the method for manufacturing the treatment tool 2D according to the fifth embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S3 according to the fifth embodiment, the operator inserts the end effector 101 from the base end side Ar2 of the cap 11D into the inside of the cap 11D. Then, the operator causes the hook portion 1012 to protrude from the tip end side Ar1 of the cap 11D by moving the cap 11D to the proximal end side Ar2 while inserting the tip of the hook portion 1012 into the slit 146. Further, the operator moves the cap 11D to the base end side Ar2 and inserts the engaging portion 141 into the inside of the sheath 8D. Then, the operator deforms the sheath 8D in the direction of reducing the diameter by crimping the sheath 8D using a jig (not shown), and the deformed portion 851 (FIGS. 24 and 26) is formed into the annular recess 1411. To fit into. Thereby, the cap 11D is attached to the sheath 8D.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図２６に示すように、張出面１４３１と第１の傾斜面１４２２との間、すなわち、第１の先端外周面１４２３上に位置する。そして、本実施の形態５では、張出面１４３１における径寸法は、図２６に示すように、チューブＴＵの先端における外径寸法と略同一である。また、張出面１４３１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８Ｄとキャップ１１Ｄとの境界を跨いでシース８Ｄの外周面とキャップ１１Ｄの外周面とをそれぞれ覆う位置に設けられている。また、シース８Ｄ及びキャップ１１Ｄにおいて、係合部１４１及び第１の傾斜面１４２２の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。すなわち、第１の傾斜面１４２２は、本発明に係る縮径部に相当する。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located between the overhanging surface 1431 and the first inclined surface 1422, that is, the first outer peripheral surface of the tip, as shown in FIG. Located on 1423. Then, in the fifth embodiment, the diameter dimension on the overhanging surface 1431 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 26. Further, the diameter dimension of the overhanging surface 1431 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8D and the cap 11D and covers the outer peripheral surface of the sheath 8D and the outer peripheral surface of the cap 11D, respectively. Further, in the sheath 8D and the cap 11D, the portion of the engaging portion 141 and the first inclined surface 1422 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the first inclined surface 1422 corresponds to the reduced diameter portion according to the present invention.
　以上説明した本実施の形態５に係る処置具本体４Ｄを採用した場合であっても、上述した実施の形態１と同様の効果を奏する。 Even when the treatment tool main body 4D according to the fifth embodiment described above is adopted, the same effect as that of the first embodiment described above is obtained.
（実施の形態６）
　次に、本実施の形態６について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態６では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（シース８及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態６に係る処置具２を処置具２Ｅと記載する。また、本実施の形態６に係る処置具本体４を処置具本体４Ｅと記載する。さらに、本実施の形態６に係るキャップ１１をキャップ１１Ｅと記載する。ここで、本実施の形態６に係るシース８については、上述した実施の形態５において説明したシース８Ｄと同様であるため、シース８Ｄと記載する。 (Embodiment 6)
Next, the sixth embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the sixth embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the sixth embodiment will be referred to as the treatment tool 2E. Further, the treatment tool main body 4 according to the sixth embodiment is referred to as a treatment tool main body 4E. Further, the cap 11 according to the sixth embodiment is referred to as a cap 11E. Here, the sheath 8 according to the sixth embodiment is referred to as the sheath 8D because it is the same as the sheath 8D described in the above-described fifth embodiment.
　図２７ないし図２９は、実施の形態６に係る処置具本体４Ｅの先端部分を示す図である。具体的に、図２７及び図２８は、処置具本体４Ｅの先端部分の外観を示す図である。なお、図２７ではチューブＴＵを取り外した状態としているのに対して、図２８ではチューブＴＵを取り付けた状態としている。図２９は、フック部１０１２の突端と中心軸Ａｘとを含む平面によって処置具本体４Ｅの先端部分を切断した断面図である。
　キャップ１１Ｅは、電気絶縁性を有するＰＥＥＫ等の樹脂材料によって構成されている。このキャップ１１Ｅは、図２７または図２８に示すように、フック部１０１２の突端と中心軸Ａｘとを含む平面を境界として第１，第２のキャップ１１Ｅ１，１１Ｅ２の２体に分割されたものである。これら第１，第２のキャップ１１Ｅ１，１１Ｅ２は、当該平面を基準として対称となる形状を有する。そして、当該第１，第２のキャップ１１Ｅ１，１１Ｅ２を組み合わせた状態において、キャップ１１Ｅは、図２７ないし図２９に示すように、係合部１５１（図２９）と、接続部１５２（図２７，図２９）と、先端部１５３とを備える。 27 to 29 are views showing the tip portion of the treatment tool main body 4E according to the sixth embodiment. Specifically, FIGS. 27 and 28 are views showing the appearance of the tip portion of the treatment tool main body 4E. In FIG. 27, the tube TU is removed, whereas in FIG. 28, the tube TU is attached. FIG. 29 is a cross-sectional view in which the tip portion of the treatment tool main body 4E is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
The cap 11E is made of a resin material such as PEEK having electrical insulation. As shown in FIG. 27 or 28, the cap 11E is divided into two bodies, the first and second caps 11E1 and 11E2, with a plane including the tip of the hook portion 1012 and the central axis Ax as a boundary. be. These first and second caps 11E1 and 11E2 have a shape symmetrical with respect to the plane. Then, in the state where the first and second caps 11E1 and 11E2 are combined, the cap 11E has the engaging portion 151 (FIG. 29) and the connecting portion 152 (FIG. 27, as shown in FIGS. 27 to 29). FIG. 29) and a tip portion 153 are provided.
　係合部１５１は、中心軸Ａｘと同軸となる円筒形状を有する。本実施の形態６では、係合部１５１の外径寸法は、シース８Ｄの内径寸法よりも若干小さい。
　この係合部１５１の外周面には、図２９に示すように、中心軸Ａｘを中心とする環形状を有し、当該中心軸Ａｘに向けて窪んだ環状凹部１５１１が設けられている。 The engaging portion 151 has a cylindrical shape coaxial with the central axis Ax. In the sixth embodiment, the outer diameter dimension of the engaging portion 151 is slightly smaller than the inner diameter dimension of the sheath 8D.
As shown in FIG. 29, the outer peripheral surface of the engaging portion 151 is provided with an annular recess 1511 having a ring shape centered on the central axis Ax and recessed toward the central axis Ax.
　接続部１５２は、係合部１５１における先端側Ａｒ１の端部と先端部１５３における基端側Ａｒ２の端部とを接続する部分であり、中心軸Ａｘを囲む略円筒形状を有する。この接続部１５２において、係合部１５１と接続する基端側Ａｒ２の端部は、係合部１５１よりも外径寸法が大きい。すなわち、キャップ１１Ｅの外周面において、接続部１５２と係合部１５１との間には、第１の段差部１５４（図２７，図２９）が設けられている。 The connecting portion 152 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 151 and the end portion of the proximal end side Ar2 in the distal end portion 153, and has a substantially cylindrical shape surrounding the central axis Ax. In this connecting portion 152, the end portion of the base end side Ar2 connected to the engaging portion 151 has a larger outer diameter than the engaging portion 151. That is, on the outer peripheral surface of the cap 11E, a first step portion 154 (FIGS. 27 and 29) is provided between the connecting portion 152 and the engaging portion 151.
　また、接続部１５２の外周面は、図２７または図２９に示すように、基端外周面１５２１と傾斜面１５２２と先端外周面１５２３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　基端外周面１５２１は、第１の段差部１５４に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　傾斜面１５２２は、基端外周面１５２１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　先端外周面１５２３は、傾斜面１５２２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。 Further, as shown in FIG. 27 or 29, the outer peripheral surface of the connecting portion 152 has a proximal outer peripheral surface 1521, an inclined surface 1522, and a tip outer peripheral surface 1523 continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of things.
The base end outer peripheral surface 1521 is a surface extending linearly from a position in contact with the first step portion 154 toward the tip end side Ar1 along the central axis Ax.
The inclined surface 1522 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the base end outer peripheral surface 1521.
The tip outer peripheral surface 1523 is a surface extending linearly from a position in contact with the inclined surface 1522 toward the tip side Ar1 along the central axis Ax.
　先端部１５３は、中心軸Ａｘを囲む略円筒形状を有し、接続部１５２における先端側Ａｒ１の端部に設けられている。この先端部１５３は、先端外周面１５２３よりも外径寸法が大きい。すなわち、キャップ１１Ｅの外周面において、先端部１５３と接続部１５２との間には、第２の段差部１５５（図２７，図２９）が設けられている。以下では、説明の便宜上、先端部１５３の外周面を張出面１５３１と記載する。この張出面１５３１は、本発明に係る張出部に相当する。
　張出面１５３１は、第２の段差部１５５に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて略直線状に延在した面である。 The tip portion 153 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 152. The tip portion 153 has a larger outer diameter than the tip outer peripheral surface 1523. That is, on the outer peripheral surface of the cap 11E, a second step portion 155 (FIGS. 27 and 29) is provided between the tip portion 153 and the connecting portion 152. Hereinafter, for convenience of explanation, the outer peripheral surface of the tip portion 153 will be referred to as an overhanging surface 1531. This overhanging surface 1531 corresponds to the overhanging portion according to the present invention.
The overhanging surface 1531 is a surface extending substantially linearly from a position in contact with the second step portion 155 toward the tip end side Ar1 along the central axis Ax.
　ここで、先端部１５３における外径寸法は、キャップ１１Ｅの基端部である係合部１５１における外径寸法よりも小さい。また、先端部１５３における外径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１５３は、細径化によって、処置具本体４Ｅを使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 153 is smaller than the outer diameter dimension of the engaging portion 151 which is the base end portion of the cap 11E. Further, the outer diameter dimension of the tip portion 153 is smaller than the outer diameter dimension of the first direction Ar3 of the hook portion 1012. The tip portion 153 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4E by reducing the diameter.
　なお、本実施の形態６に係る処置具２Ｅの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態６に係るステップＳ３では、作業者は、第１，第２のキャップ１１Ｅ１，１１Ｅ２の間に柱状部１０１１が位置する状態で、当該第１，第２のキャップ１１Ｅ１，１１Ｅ２を組み合わせる。この状態では、フック部１０１２は、当該第１，第２のキャップ１１Ｅ１，１１Ｅ２を組み合わせたキャップ１１Ｅの先端側Ａｒ１から突出した状態となる。そして、作業者は、当該キャップ１１Ｅを基端側Ａｒ２に移動させ、係合部１５１をシース８Ｄの内部に挿通する。そして、作業者は、図示しない治具を用いて、シース８Ｄをかしめることによって当該シース８Ｄを縮径する方向に変形させ、当該変形させた部分８５１（図２７，図２９）を環状凹部１５１１に嵌合させる。これによって、キャップ１１Ｅは、シース８Ｄに対して取り付けられる。 In the method for manufacturing the treatment tool 2E according to the sixth embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S3 according to the sixth embodiment, the operator combines the first and second caps 11E1 and 11E2 in a state where the columnar portion 1011 is located between the first and second caps 11E1 and 11E2. .. In this state, the hook portion 1012 is in a state of protruding from the tip end side Ar1 of the cap 11E in which the first and second caps 11E1 and 11E2 are combined. Then, the operator moves the cap 11E to the base end side Ar2 and inserts the engaging portion 151 into the inside of the sheath 8D. Then, the operator deforms the sheath 8D in the direction of reducing the diameter by crimping the sheath 8D using a jig (not shown), and the deformed portion 851 (FIGS. 27 and 29) is formed into the annular recess 1511. To fit into. Thereby, the cap 11E is attached to the sheath 8D.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図２９に示すように、張出面１５３１と傾斜面１５２２との間、すなわち、先端外周面１５２３上に位置する。そして、本実施の形態６では、張出面１５３１における径寸法は、図２９に示すように、チューブＴＵの先端における外径寸法と略同一である。また、張出面１５３１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８Ｄとキャップ１１Ｅとの境界を跨いでシース８Ｄの外周面とキャップ１１Ｅの外周面とをそれぞれ覆う位置に設けられている。また、シース８Ｄ及びキャップ１１Ｅにおいて、係合部１５１及び傾斜面１５２２の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。すなわち、傾斜面１５２２は、本発明に係る縮径部に相当する。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located between the overhanging surface 1531 and the inclined surface 1522, that is, on the tip outer peripheral surface 1523, as shown in FIG. 29. Then, in the sixth embodiment, the diameter dimension on the overhanging surface 1531 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 29. Further, the diameter dimension of the overhanging surface 1531 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8D and the cap 11E and covers the outer peripheral surface of the sheath 8D and the outer peripheral surface of the cap 11E, respectively. Further, in the sheath 8D and the cap 11E, the engaging portion 151 and the inclined surface 1522 portion correspond to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the inclined surface 1522 corresponds to the reduced diameter portion according to the present invention.
　以上説明した本実施の形態６に係る処置具本体４Ｅを採用した場合であっても、上述した実施の形態１と同様の効果を奏する。
　また、キャップ１１Ｅは、第１，第２のキャップ１１Ｅ１，１１Ｅ２の２つの部材によって構成されている。このため、ステップＳ３において、キャップ１１Ｅの内部にエンドエフェクタ１０１を挿通する作業を行う必要がなく、当該キャップ１１Ｅの組み付けを容易に行うことができる。 Even when the treatment tool main body 4E according to the sixth embodiment described above is adopted, the same effect as that of the first embodiment described above can be obtained.
Further, the cap 11E is composed of two members, the first and second caps 11E1 and 11E2. Therefore, in step S3, it is not necessary to insert the end effector 101 into the cap 11E, and the cap 11E can be easily assembled.
（実施の形態７）
　次に、本実施の形態７について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態７では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（シース８及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態７に係る処置具２を処置具２Ｆと記載する。また、本実施の形態７に係る処置具本体４を処置具本体４Ｆと記載する。さらに、本実施の形態７に係るシース８をシース８Ｆと記載する。また、本実施の形態７に係るキャップ１１をキャップ１１Ｆと記載する。 (Embodiment 7)
Next, the seventh embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the seventh embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the seventh embodiment will be referred to as the treatment tool 2F. Further, the treatment tool main body 4 according to the seventh embodiment is referred to as a treatment tool main body 4F. Further, the sheath 8 according to the seventh embodiment is referred to as a sheath 8F. Further, the cap 11 according to the seventh embodiment is referred to as a cap 11F.
　図３０ないし図３２は、実施の形態７に係る処置具本体４Ｆの先端部分を示す図である。具体的に、図３０及び図３１は、処置具本体４Ｆの先端部分の外観を示す図である。なお、図３０ではチューブＴＵを取り外した状態としているのに対して、図３１ではチューブＴＵを取り付けた状態としている。図３２は、フック部１０１２の突端と中心軸Ａｘとを含む平面によって処置具本体４Ｆの先端部分を切断した断面図である。
　キャップ１１Ｆは、電気絶縁性を有するＰＥＥＫ等の樹脂材料によって構成されている。このキャップ１１Ｄは、図３０ないし図３２に示すように、係合部１６１と、接続部１６２と、露出部１６３とを備える。 30 to 32 are views showing a tip portion of the treatment tool main body 4F according to the seventh embodiment. Specifically, FIGS. 30 and 31 are views showing the appearance of the tip portion of the treatment tool main body 4F. In FIG. 30, the tube TU is removed, whereas in FIG. 31, the tube TU is attached. FIG. 32 is a cross-sectional view in which the tip portion of the treatment tool main body 4F is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
The cap 11F is made of a resin material such as PEEK having electrical insulation. As shown in FIGS. 30 to 32, the cap 11D includes an engaging portion 161, a connecting portion 162, and an exposed portion 163.
　係合部１６１は、中心軸Ａｘと同軸となる円筒形状を有する。本実施の形態７では、係合部１６１の外径寸法は、シース８Ｆにおける先端側Ａｒ１の端部の外径寸法よりも若干大きい。また、係合部１６１の内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも若干大きい。
　この係合部１６１の内周面には、図３２に示すように、中心軸Ａｘを中心とする環形状を有し、当該中心軸Ａｘから離間する方向に窪んだ環状凹部１６１１が設けられている。 The engaging portion 161 has a cylindrical shape coaxial with the central axis Ax. In the seventh embodiment, the outer diameter dimension of the engaging portion 161 is slightly larger than the outer diameter dimension of the end portion of the distal end side Ar1 in the sheath 8F. Further, the inner diameter dimension of the engaging portion 161 is slightly larger than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
As shown in FIG. 32, the inner peripheral surface of the engaging portion 161 is provided with an annular recess 1611 having a ring shape centered on the central axis Ax and recessed in a direction away from the central axis Ax. There is.
　接続部１６２は、係合部１６１における先端側Ａｒ１の端部と露出部１６３における基端側Ａｒ２の端部とを接続する部分であり、中心軸Ａｘを囲む略円筒形状を有する。本実施の形態７では、接続部１６２の内径寸法は、係合部１６１の内径寸法と略同一である。
　また、接続部１６２の外周面は、図３０または図３２に示すように、第１の傾斜面１６２１と第１の先端外周面１６２２とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　第１の傾斜面１６２１は、係合部１６１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　第１の先端外周面１６２２は、第１の傾斜面１６２１に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。 The connecting portion 162 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 161 and the end portion of the proximal end side Ar2 in the exposed portion 163, and has a substantially cylindrical shape surrounding the central axis Ax. In the seventh embodiment, the inner diameter dimension of the connecting portion 162 is substantially the same as the inner diameter dimension of the engaging portion 161.
Further, as shown in FIG. 30 or FIG. 32, the outer peripheral surface of the connecting portion 162 has a first inclined surface 1621 and a first tip outer peripheral surface 1622 continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of things.
The first inclined surface 1621 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the engaging portion 161.
The first tip outer peripheral surface 1622 is a surface extending linearly from a position in contact with the first inclined surface 1621 toward the tip side Ar1 along the central axis Ax.
　露出部１６３は、中心軸Ａｘを囲む略円筒形状を有し、接続部１６２における先端側Ａｒ１の端部に設けられている。この露出部１６３において、接続部１６２と接続する基端側Ａｒ２の端部は、第１の先端外周面１６２２よりも外径寸法が大きい。すなわち、キャップ１１Ｆの外周面において、露出部１６３と接続部１６２との間には、段差部１６４（図３０，図３２）が設けられている。そして、露出部１６３の外周面は、当該露出部１６３の径方向の外側に向かって張り出した張出面１６３１を有する。この張出面１６３１は、段差部１６４に接する面であるとともに、本発明に係る張出部に相当する。 The exposed portion 163 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the connecting portion 162. In the exposed portion 163, the end portion of the base end side Ar2 connected to the connecting portion 162 has a larger outer diameter than the first outer peripheral surface 1622. That is, on the outer peripheral surface of the cap 11F, a step portion 164 (FIGS. 30 and 32) is provided between the exposed portion 163 and the connecting portion 162. The outer peripheral surface of the exposed portion 163 has an overhanging surface 1631 that projects outward in the radial direction of the exposed portion 163. The overhanging surface 1631 is a surface in contact with the stepped portion 164 and corresponds to the overhanging portion according to the present invention.
　また、露出部１６３の外周面は、図３０ないし図３２に示すように、張出面１６３１と第２の傾斜面１６３２と第２の先端外周面１６３３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　張出面１６３１は、段差部１６４に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　第２の傾斜面１６３２は、張出面１６３１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　第２の先端外周面１６３３は、第２の傾斜面１６３２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて略直線状に延在した面である。
　本実施の形態７では、露出部１６３における先端側Ａｒ１の端部の内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。 Further, as shown in FIGS. 30 to 32, the outer peripheral surface of the exposed portion 163 has an overhanging surface 1631, a second inclined surface 1632, and a second tip outer peripheral surface 1633 directed from the proximal end side Ar2 to the distal end side Ar1. It is configured by being connected in a row.
The overhanging surface 1631 is a surface extending linearly from a position in contact with the step portion 164 toward the tip end side Ar1 along the central axis Ax.
The second inclined surface 1632 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the overhanging surface 1631.
The second tip outer peripheral surface 1633 is a surface extending substantially linearly from a position in contact with the second inclined surface 1632 toward the tip side Ar1 along the central axis Ax.
In the seventh embodiment, the inner diameter dimension of the end portion of the tip end side Ar1 in the exposed portion 163 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012.
　ここで、第２の先端外周面１６３３を有する先端部１６０（図３０～図３２）における外径寸法は、キャップ１１Ｆの基端部である係合部１６１における外径寸法よりも小さい。また、先端部１６０における外径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１６０は、細径化によって、処置具本体４を使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 160 (FIGS. 30 to 32) having the second tip outer peripheral surface 1633 is smaller than the outer diameter dimension of the engaging portion 161 which is the base end portion of the cap 11F. Further, the outer diameter dimension of the tip portion 160 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3. The tip portion 160 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4 by reducing the diameter.
　以上説明したキャップ１１Ｆには、第１の方向Ａｒ３における一端側に、露出部１６３の先端から基端側Ａｒ２に向けて中心軸Ａｘに沿って直線状に切り欠かれたスリット１６５（図３０～図３２）が設けられている。
　このスリット１６５の幅寸法は、フック部１０１２における第２の方向Ａｒ４の外形寸法よりも若干大きい。 The cap 11F described above has a slit 165 (FIGS. 30 to 30), which is linearly cut along the central axis Ax from the tip of the exposed portion 163 toward the proximal end side Ar2 on one end side in the first direction Ar3. FIG. 32) is provided.
The width dimension of the slit 165 is slightly larger than the external dimension of the second direction Ar4 in the hook portion 1012.
　シース８Ｆにおける先端側Ａｒ１の端部は、図３０または図３２に示すように、先端側Ａｒ１に向かうにしたがって、外径寸法及び内径寸法が小さくなる。本実施の形態７では、当該先端側Ａｒ１の端部の内径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端側Ａｒ１の端部には、外周面から内周面まで貫通するとともにシース８Ｆの先端から基端側Ａｒ２に向けて延在し、ステップＳ２を行う際に、フック部１０１２との干渉を防止するためのスリット８６１（図３０）が設けられている。 As shown in FIGS. 30 or 32, the outer diameter dimension and the inner diameter dimension of the end portion of the tip side Ar1 in the sheath 8F becomes smaller toward the tip side Ar1. In the seventh embodiment, the inner diameter dimension of the end portion of the tip end side Ar1 is smaller than the outer diameter dimension of the first direction Ar3 in the hook portion 1012. Then, the end portion of the distal end side Ar1 penetrates from the outer peripheral surface to the inner peripheral surface and extends from the distal end side of the sheath 8F toward the proximal end side Ar2, and when performing step S2, the hook portion 1012 is used. A slit 861 (FIG. 30) is provided to prevent interference.
　なお、本実施の形態７に係る処置具２Ｆの製造方法は、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態７に係るステップＳ３では、作業者は、キャップ１１Ｆの基端側Ａｒ２から当該キャップ１１Ｆの内部にエンドエフェクタ１０１を挿通する。そして、作業者は、スリット１６５内にフック部１０１２の突端を入り込ませつつ、キャップ１１Ｆを基端側Ａｒ２に移動させることによって、当該フック部１０１２を当該キャップ１１Ｆの先端側Ａｒ１から突出させる。また、作業者は、キャップ１１Ｆを基端側Ａｒ２に移動させ、係合部１６１の内部にシース８Ｆの先端側Ａｒ１の端部を挿通する。そして、作業者は、図示しない治具を用いて、シース８Ｆをかしめることによって当該シース８Ｆを拡径する方向に変形させ、当該変形させた部分８６２（図３２）を環状凹部１６１１に嵌合させる。これによって、キャップ１１Ｆは、シース８Ｆに対して取り付けられる。 The method for manufacturing the treatment tool 2F according to the seventh embodiment is different from the method for manufacturing the treatment tool 2 (FIG. 8) described in the above-described first embodiment in step S3.
In step S3 according to the seventh embodiment, the operator inserts the end effector 101 from the base end side Ar2 of the cap 11F into the inside of the cap 11F. Then, the operator causes the hook portion 1012 to protrude from the tip end side Ar1 of the cap 11F by moving the cap 11F to the proximal end side Ar2 while inserting the tip of the hook portion 1012 into the slit 165. Further, the operator moves the cap 11F to the base end side Ar2 and inserts the end portion of the tip end side Ar1 of the sheath 8F into the inside of the engaging portion 161. Then, the operator uses a jig (not shown) to crimp the sheath 8F to deform the sheath 8F in the direction of increasing the diameter, and the deformed portion 862 (FIG. 32) is fitted into the annular recess 1611. Let me. Thereby, the cap 11F is attached to the sheath 8F.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図３２に示すように、張出面１６３１と第１の傾斜面１６２１との間、すなわち、第１の先端外周面１６２２上に位置する。そして、本実施の形態７では、張出面１６３１における径寸法は、図３２に示すように、チューブＴＵの先端における外径寸法と略同一である。また、張出面１６３１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８Ｆとキャップ１１Ｆとの境界を跨いでシース８Ｆの外周面とキャップ１１Ｆの外周面とをそれぞれ覆う位置に設けられている。また、シース８Ｆ及びキャップ１１Ｆにおいて、係合部１６１及び第１の傾斜面１６２１の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。すなわち、第１の傾斜面１６２１は、本発明に係る縮径部に相当する。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is between the overhanging surface 1631 and the first inclined surface 1621, that is, the first outer peripheral surface of the tip, as shown in FIG. Located on 1622. Then, in the seventh embodiment, the diameter dimension on the overhanging surface 1631 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 32. Further, the diameter dimension of the overhanging surface 1631 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8F and the cap 11F and covers the outer peripheral surface of the sheath 8F and the outer peripheral surface of the cap 11F, respectively. Further, in the sheath 8F and the cap 11F, the portion of the engaging portion 161 and the first inclined surface 1621 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the first inclined surface 1621 corresponds to the reduced diameter portion according to the present invention.
　以上説明した本実施の形態７に係る処置具本体４Ｆを採用した場合であっても、上述した実施の形態１と同様の効果を奏する。 Even when the treatment tool main body 4F according to the seventh embodiment described above is adopted, the same effect as that of the first embodiment described above is obtained.
（実施の形態８）
　次に、本実施の形態８について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態８では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（シース８及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態８に係る処置具２を処置具２Ｇと記載する。また、本実施の形態８に係る処置具本体４を処置具本体４Ｇと記載する。さらに、本実施の形態８に係るキャップ１１をキャップ１１Ｇと記載する。ここで、本実施の形態８に係るシース８については、上述した実施の形態２において説明したシース８Ａと略同様の形状であるため、シース８Ａと記載する。 (Embodiment 8)
Next, the eighth embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the eighth embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the eighth embodiment will be referred to as the treatment tool 2G. Further, the treatment tool main body 4 according to the eighth embodiment is referred to as a treatment tool main body 4G. Further, the cap 11 according to the eighth embodiment is referred to as a cap 11G. Here, the sheath 8 according to the eighth embodiment is referred to as the sheath 8A because it has substantially the same shape as the sheath 8A described in the second embodiment described above.
　図３３ないし図３５は、実施の形態８に係る処置具本体４Ｇの先端部分を示す図である。図３６は、第１のキャップ１１Ｇ１を示す図である。具体的に、図３３及び図３４は、処置具本体４Ｇの先端部分の外観を示す図である。なお、図３３ではチューブＴＵを取り外した状態としているのに対して、図３４ではチューブＴＵを取り付けた状態としている。図３５は、フック部１０１２の突端と中心軸Ａｘとを含む平面によって処置具本体４Ｇの先端部分を切断した断面図である。
　キャップ１１Ｇは、電気絶縁性を有するＰＥＥＫ等の樹脂材料によって構成されている。このキャップ１１Ｇは、図３３、図３４、または図３６に示すように、フック部１０１２の突端と中心軸Ａｘとを含む平面を境界として第１，第２のキャップ１１Ｇ１，１１Ｇ２の２体に分割されたものである。これら第１，第２のキャップ１１Ｇ１，１１Ｇ２は、当該平面を基準として対称となる形状を有する。そして、当該第１，第２のキャップ１１Ｇ１，１１Ｇ２を組み合わせた状態において、キャップ１１Ｇは、図３３ないし図３６に示すように、係合部１７１（図３３、図３５，図３６）と、接続部１７２（図３３，図３５，図３６）と、先端部１７３とを備える。 33 to 35 are views showing the tip portion of the treatment tool main body 4G according to the eighth embodiment. FIG. 36 is a diagram showing the first cap 11G1. Specifically, FIGS. 33 and 34 are views showing the appearance of the tip portion of the treatment tool main body 4G. In FIG. 33, the tube TU is removed, whereas in FIG. 34, the tube TU is attached. FIG. 35 is a cross-sectional view in which the tip portion of the treatment tool main body 4G is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
The cap 11G is made of a resin material such as PEEK having electrical insulation. As shown in FIGS. 33, 34, or 36, the cap 11G is divided into two bodies, the first and second caps 11G1 and 11G2, with a plane including the tip of the hook portion 1012 and the central axis Ax as a boundary. It was done. These first and second caps 11G1 and 11G2 have a shape symmetrical with respect to the plane. Then, in the state where the first and second caps 11G1 and 11G2 are combined, the cap 11G is connected to the engaging portion 171 (FIGS. 33, 35, 36) as shown in FIGS. 33 to 36. A portion 172 (FIG. 33, 35, 36) and a tip portion 173 are provided.
　係合部１７１は、中心軸Ａｘと同軸となる略円筒形状を有する。本実施の形態８では、係合部１７１の外径寸法は、シース８Ａの内径寸法よりも若干小さい。
　この係合部１７１の外周面には、図３３または図３６に示すように、中心軸Ａｘから離間する方向にそれぞれ突出した一対の凸部１７１１が設けられている。これら一対の凸部１７１１は、第１，第２のキャップ１１Ｇ１，１１Ｇ２にそれぞれ設けられ、中心軸Ａｘを中心とする１８０°の回転対称となる位置にそれぞれ位置する。 The engaging portion 171 has a substantially cylindrical shape coaxial with the central axis Ax. In the eighth embodiment, the outer diameter dimension of the engaging portion 171 is slightly smaller than the inner diameter dimension of the sheath 8A.
As shown in FIGS. 33 or 36, the outer peripheral surface of the engaging portion 171 is provided with a pair of convex portions 1711 protruding in directions away from the central axis Ax. These pair of convex portions 1711 are provided on the first and second caps 11G1 and 11G2, respectively, and are located at positions that are 180 ° rotationally symmetric with respect to the central axis Ax.
　接続部１７２は、係合部１７１における先端側Ａｒ１の端部と先端部１５３における基端側Ａｒ２の端部とを接続する部分であり、中心軸Ａｘを囲む略円筒形状を有する。この接続部１７２において、係合部１７１と接続する基端側Ａｒ２の端部は、係合部１７１よりも外径寸法が大きい。すなわち、キャップ１１Ｇの外周面において、接続部１７２と係合部１７１との間には、第１の段差部１７４（図３５，図３６）が設けられている。 The connecting portion 172 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 171 and the end portion of the proximal end side Ar2 in the distal end portion 153, and has a substantially cylindrical shape surrounding the central axis Ax. In this connecting portion 172, the end portion of the base end side Ar2 connected to the engaging portion 171 has a larger outer diameter than the engaging portion 171. That is, on the outer peripheral surface of the cap 11G, a first step portion 174 (FIGS. 35 and 36) is provided between the connecting portion 172 and the engaging portion 171.
　また、接続部１７２の外周面は、図３５または図３６に示すように、基端外周面１７２１と傾斜面１７２２と先端外周面１７２３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　基端外周面１７２１は、第１の段差部１７４に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　傾斜面１７２２は、基端外周面１７２１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　先端外周面１７２３は、傾斜面１７２２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。 Further, as shown in FIG. 35 or FIG. 36, on the outer peripheral surface of the connecting portion 172, the proximal outer peripheral surface 1721, the inclined surface 1722, and the distal outer peripheral surface 1723 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of things.
The base end outer peripheral surface 1721 is a surface extending linearly from a position in contact with the first step portion 174 toward the tip end side Ar1 along the central axis Ax.
The inclined surface 1722 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the base end outer peripheral surface 1721.
The tip outer peripheral surface 1723 is a surface extending linearly from a position in contact with the inclined surface 1722 toward the tip side Ar1 along the central axis Ax.
　先端部１７３は、中心軸Ａｘを囲む略円筒形状を有し、接続部１７２における先端側Ａｒ１の端部に設けられている。この先端部１７３は、先端外周面１７２３よりも外径寸法が大きい。すなわち、キャップ１１Ｇの外周面において、先端部１７３と接続部１７２との間には、第２の段差部１７５（図３３，図３５，図３６）が設けられている。以下では、説明の便宜上、先端部１７３の外周面を張出面１７３１と記載する。この張出面１７３１は、本発明に係る張出部に相当する。
　張出面１７３１は、第２の段差部１７５に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて略直線状に延在した面である。 The tip portion 173 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 172. The tip portion 173 has a larger outer diameter than the tip outer peripheral surface 1723. That is, on the outer peripheral surface of the cap 11G, a second step portion 175 (FIGS. 33, 35, 36) is provided between the tip portion 173 and the connecting portion 172. In the following, for convenience of explanation, the outer peripheral surface of the tip portion 173 will be referred to as an overhanging surface 1731. This overhanging surface 1731 corresponds to the overhanging portion according to the present invention.
The overhanging surface 1731 is a surface extending substantially linearly from a position in contact with the second step portion 175 toward the tip end side Ar1 along the central axis Ax.
　ここで、先端部１７３における外径寸法は、キャップ１１Ｇの基端部である係合部１７１における外径寸法よりも小さい。また、先端部１７３における外径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１７３は、細径化によって、処置具本体４Ｇを使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 173 is smaller than the outer diameter dimension of the engaging portion 171 which is the base end portion of the cap 11G. Further, the outer diameter dimension of the tip portion 173 is smaller than the outer diameter dimension of the first direction Ar3 of the hook portion 1012. The tip portion 173 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4G by reducing the diameter.
　なお、本実施の形態８に係る処置具２Ｇの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態８に係るステップＳ３では、作業者は、第１，第２のキャップ１１Ｇ１，１１Ｇ２の間に柱状部１０１１が位置する状態で、当該第１，第２のキャップ１１Ｇ１，１１Ｇ２を組み合わせる。この状態では、フック部１０１２は、当該第１，第２のキャップ１１Ｇ１，１１Ｇ２を組み合わせたキャップ１１Ｇの先端側Ａｒ１から突出した状態となる。そして、作業者は、当該キャップ１１Ｇを基端側Ａｒ２に移動させ、係合部１７１をシース８Ａの内部に挿通する。キャップ１１Ｇは、凸部１７１１が係止用開口部８２２に対して係止することによって、シース８Ａに対して取り付けられる。すなわち、キャップ１１Ｇは、スナップフィット方式によって、シース８Ａに対して取り付けられる。 In the method for manufacturing the treatment tool 2G according to the eighth embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S3 according to the eighth embodiment, the operator combines the first and second caps 11G1 and 11G2 in a state where the columnar portion 1011 is located between the first and second caps 11G1 and 11G2. .. In this state, the hook portion 1012 is in a state of protruding from the tip end side Ar1 of the cap 11G in which the first and second caps 11G1 and 11G2 are combined. Then, the operator moves the cap 11G to the base end side Ar2 and inserts the engaging portion 171 into the inside of the sheath 8A. The cap 11G is attached to the sheath 8A by locking the convex portion 1711 to the locking opening 822. That is, the cap 11G is attached to the sheath 8A by the snap-fit method.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図３５に示すように、張出面１７３１と傾斜面１７２２との間、すなわち、先端外周面１７２３上に位置する。そして、本実施の形態８では、張出面１７３１における径寸法は、図３５に示すように、チューブＴＵの先端における外径寸法と略同一である。また、張出面１７３１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８Ａとキャップ１１Ｇとの境界を跨いでシース８Ａの外周面とキャップ１１Ｇの外周面とをそれぞれ覆う位置に設けられている。また、シース８Ａ及びキャップ１１Ｇにおいて、係合部１７１及び傾斜面１７２２の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。すなわち、傾斜面１７２２は、本発明に係る縮径部に相当する。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located between the overhanging surface 1731 and the inclined surface 1722, that is, on the tip outer peripheral surface 1723, as shown in FIG. 35. Then, in the eighth embodiment, the diameter dimension on the overhanging surface 1731 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 35. Further, the diameter dimension of the overhanging surface 1731 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8A and the cap 11G and covers the outer peripheral surface of the sheath 8A and the outer peripheral surface of the cap 11G, respectively. Further, in the sheath 8A and the cap 11G, the engaging portion 171 and the inclined surface 1722 portion correspond to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the inclined surface 1722 corresponds to the reduced diameter portion according to the present invention.
　以上説明した本実施の形態８に係る処置具本体４Ｇを採用した場合であっても、上述した実施の形態１，６と同様の効果を奏する。 Even when the treatment tool main body 4G according to the eighth embodiment described above is adopted, the same effect as that of the first and sixth embodiments described above is obtained.
（実施の形態９）
　次に、本実施の形態９について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態９では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（シース８及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態９に係る処置具２を処置具２Ｈと記載する。また、本実施の形態９に係る処置具本体４を処置具本体４Ｈと記載する。さらに、本実施の形態９に係るキャップ１１をキャップ１１Ｈと記載する。ここで、本実施の形態９に係るシース８については、上述した実施の形態２において説明したシース８Ａと略同様の形状であるため、シース８Ａと記載する。 (Embodiment 9)
Next, the ninth embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the ninth embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the ninth embodiment will be referred to as the treatment tool 2H. Further, the treatment tool main body 4 according to the ninth embodiment is referred to as a treatment tool main body 4H. Further, the cap 11 according to the ninth embodiment is referred to as a cap 11H. Here, the sheath 8 according to the ninth embodiment is referred to as the sheath 8A because it has substantially the same shape as the sheath 8A described in the second embodiment described above.
　図３７ないし図３９は、実施の形態９に係る処置具本体４Ｈの先端部分を示す図である。具体的に、図３７及び図３８は、処置具本体４Ｈの先端部分の外観を示す図である。なお、図３７ではチューブＴＵを取り外した状態としているのに対して、図３８ではチューブＴＵを取り付けた状態としている。図３９は、フック部１０１２の突端と中心軸Ａｘとを含む平面によって処置具本体４Ｈの先端部分を切断した断面図である。
　キャップ１１Ｈは、電気絶縁性を有するＰＥＥＫ等の樹脂材料によって構成されている。このキャップ１１Ｈは、図３７または図３８に示すように、フック部１０１２の突端と中心軸Ａｘとを含む平面を境界として第１，第２のキャップ１１Ｈ１，１１Ｈ２の２体に分割されたものである。これら第１，第２のキャップ１１Ｈ１，１１Ｈ２は、当該平面を基準として対称となる形状を有する。そして、当該第１，第２のキャップ１１Ｈ１，１１Ｈ２を組み合わせた状態において、キャップ１１Ｈは、図３７ないし図３９に示すように、係合部１８１（図３７，図３９）と、接続部１８２（図３７，図３９）と、先端部１８３とを備える。 37 to 39 are views showing the tip portion of the treatment tool main body 4H according to the ninth embodiment. Specifically, FIGS. 37 and 38 are views showing the appearance of the tip portion of the treatment tool main body 4H. In FIG. 37, the tube TU is removed, whereas in FIG. 38, the tube TU is attached. FIG. 39 is a cross-sectional view in which the tip portion of the treatment tool main body 4H is cut by a plane including the tip of the hook portion 1012 and the central axis Ax.
The cap 11H is made of a resin material such as PEEK having electrical insulation. As shown in FIG. 37 or FIG. 38, the cap 11H is divided into two bodies, the first and second caps 11H1 and 11H2, with a plane including the tip of the hook portion 1012 and the central axis Ax as a boundary. be. These first and second caps 11H1 and 11H2 have a shape symmetrical with respect to the plane. Then, in the state where the first and second caps 11H1 and 11H2 are combined, the cap 11H has the engaging portion 181 (FIG. 37, 39) and the connecting portion 182 (as shown in FIGS. 37 to 39). 37, 39) and a tip portion 183 are provided.
　係合部１８１は、図３７または図３９に示すように、係合部本体１８１１と、一対の腕部１８１２とを備える。
　係合部本体１８１１は、中心軸Ａｘと同軸となる円筒形状を有する。本実施の形態９では、係合部本体１８１１の外径寸法は、シース８Ａの外径寸法と略同一である。
　一対の腕部１８１２は、第１，第２のキャップ１１Ｈ１，１１Ｈ２にそれぞれ設けられ、中心軸Ａｘを中心とする１８０°の回転対称となる位置にそれぞれ位置する。より具体的に、一対の腕部１８１２は、係合部本体１８１１における基端から互いに対向しつつ基端側Ａｒ２に向けてそれぞれ突出し、先端側Ａｒ１の基部を基点として互いに近接離間する方向に弾性変形可能とする。これら一対の腕部１８１２における互いに対向する面同士の離間寸法は、シース８Ａにおける一対の平坦部８２１の外面同士の離間寸法と略同一である。また、一対の腕部１８１２において、互いに対向する面の基端側Ａｒ２には、凸部（図示略）がそれぞれ設けられている。 As shown in FIG. 37 or FIG. 39, the engaging portion 181 includes an engaging portion main body 1811 and a pair of arm portions 1812.
The engaging portion main body 1811 has a cylindrical shape coaxial with the central axis Ax. In the ninth embodiment, the outer diameter dimension of the engaging portion main body 1811 is substantially the same as the outer diameter dimension of the sheath 8A.
The pair of arm portions 1812 are provided on the first and second caps 11H1 and 11H2, respectively, and are located at positions that are 180 ° rotationally symmetric with respect to the central axis Ax. More specifically, the pair of arm portions 1812 project from the base end of the engaging portion main body 1811 toward the base end side Ar2 while facing each other, and are elastic in a direction in which they are close to each other with the base portion of the tip end side Ar1 as the base point. Make it deformable. The distance between the faces facing each other in the pair of arm portions 1812 is substantially the same as the distance between the outer surfaces of the pair of flat portions 821 in the sheath 8A. Further, in the pair of arm portions 1812, convex portions (not shown) are provided on the proximal end side Ar2 of the surfaces facing each other.
　接続部１８２は、係合部１８１における先端側Ａｒ１の端部と先端部１８３における基端側Ａｒ２の端部とを接続する部分であり、中心軸Ａｘを囲む略円筒形状を有する。
　また、接続部１８２の外周面は、図３７または図３９に示すように、傾斜面１８２１と先端外周面１８２２とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　傾斜面１８２１は、係合部１８１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　先端外周面１８２２は、傾斜面１８２１に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。 The connecting portion 182 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 181 and the end portion of the proximal end side Ar2 in the distal end portion 183, and has a substantially cylindrical shape surrounding the central axis Ax.
Further, as shown in FIG. 37 or FIG. 39, the outer peripheral surface of the connecting portion 182 is configured such that the inclined surface 1821 and the tip outer peripheral surface 1822 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. There is.
The inclined surface 1821 is a surface whose diameter dimension decreases toward the tip end side Ar1 from a position in contact with the engaging portion 181.
The tip outer peripheral surface 1822 is a surface extending linearly from a position in contact with the inclined surface 1821 toward the tip side Ar1 along the central axis Ax.
　先端部１８３は、中心軸Ａｘを囲む略円筒形状を有し、接続部１８２における先端側Ａｒ１の端部に設けられている。この先端部１８３は、先端外周面１８２２よりも外径寸法が大きい。すなわち、キャップ１１Ｈの外周面において、先端部１８３と接続部１８２との間には、段差部１８４（図３７～図３９）が設けられている。以下では、説明の便宜上、先端部１８３の外周面を張出面１８３１と記載する。この張出面１８３１は、本発明に係る張出部に相当する。
　張出面１８３１は、段差部１８４に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて略直線状に延在した面である。 The tip portion 183 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 182. The tip portion 183 has a larger outer diameter than the tip outer peripheral surface 1822. That is, on the outer peripheral surface of the cap 11H, a step portion 184 (FIGS. 37 to 39) is provided between the tip portion 183 and the connection portion 182. Hereinafter, for convenience of explanation, the outer peripheral surface of the tip portion 183 will be referred to as an overhanging surface 1831. This overhanging surface 1831 corresponds to the overhanging portion according to the present invention.
The overhanging surface 1831 is a surface extending substantially linearly from a position in contact with the step portion 184 toward the tip end side Ar1 along the central axis Ax.
　ここで、先端部１８３における外径寸法は、キャップ１１Ｈの基端部である係合部本体１８１１における外径寸法よりも小さい。また、先端部１８３における外径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１８３は、細径化によって、処置具本体４Ｈを使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 183 is smaller than the outer diameter dimension of the engaging portion main body 1811 which is the base end portion of the cap 11H. Further, the outer diameter dimension of the tip portion 183 is smaller than the outer diameter dimension of the first direction Ar3 of the hook portion 1012. The tip portion 183 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4H by reducing the diameter.
　なお、本実施の形態９に係る処置具２Ｈの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態９に係るステップＳ９では、作業者は、第１，第２のキャップ１１Ｈ１，１１Ｈ２の間に柱状部１０１１及びシース８Ａが位置する状態で、当該第１，第２のキャップ１１Ｈ１，１１Ｈ２を組み合わせ、一対の腕部１８１２における各凸部（図示略）を係止用開口部８２２に対して係止させる。そして、キャップ１１Ｈは、ステップＳ４によってチューブＴＵが取り付けられることによって、シース８Ａに対して取り付けられる。 In the method for manufacturing the treatment tool 2H according to the ninth embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S9 according to the ninth embodiment, the operator has the columnar portions 1011 and the sheath 8A located between the first and second caps 11H1 and 11H2, and the first and second caps 11H1 and the sheath 8A are located between the first and second caps 11H1 and 11H2. 11H2 is combined, and each convex portion (not shown) in the pair of arm portions 1812 is locked with respect to the locking opening 822. Then, the cap 11H is attached to the sheath 8A by attaching the tube TU by step S4.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図３８または図３９に示すように、張出面１８３１と傾斜面１８２１との間、すなわち、先端外周面１８２２上に位置する。そして、本実施の形態９では、張出面１８３１における径寸法は、図３９に示すように、チューブＴＵの先端における外径寸法と略同一である。また、張出面１８３１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８Ａとキャップ１１Ｈとの境界を跨いでシース８Ａの外周面とキャップ１１Ｈの外周面とをそれぞれ覆う位置に設けられている。また、シース８Ａ及びキャップ１１Ｈにおいて、一対の腕部１８１２及び傾斜面１８２１の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。すなわち、傾斜面１８２１は、本発明に係る縮径部に相当する。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located between the overhanging surface 1831 and the inclined surface 1821, that is, on the tip outer peripheral surface 1822, as shown in FIG. 38 or FIG. 39. To position. Then, in the ninth embodiment, the diameter dimension on the overhanging surface 1831 is substantially the same as the outer diameter dimension at the tip of the tube TU, as shown in FIG. 39. Further, the diameter dimension of the overhanging surface 1831 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8A and the cap 11H and covers the outer peripheral surface of the sheath 8A and the outer peripheral surface of the cap 11H, respectively. Further, in the sheath 8A and the cap 11H, the pair of arm portions 1812 and the inclined surface 1821 portion correspond to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region. That is, the inclined surface 1821 corresponds to the reduced diameter portion according to the present invention.
　以上説明した本実施の形態９に係る処置具本体４Ｈを採用した場合であっても、上述した実施の形態１，６と同様の効果を奏する。 Even when the treatment tool main body 4H according to the ninth embodiment described above is adopted, the same effect as that of the first and sixth embodiments described above is obtained.
（実施の形態１０）
　次に、本実施の形態１０について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態１０では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（シース８及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態１０に係る処置具２を処置具２Ｉと記載する。また、本実施の形態１０に係る処置具本体４を処置具本体４Ｉと記載する。さらに、本実施の形態１０に係るシース８をシース８Ｉと記載する。また、本実施の形態１０に係るキャップ１１をキャップ１１Ｉと記載する。 (Embodiment 10)
Next, the tenth embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the tenth embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the sheath 8 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the tenth embodiment will be referred to as a treatment tool 2I. Further, the treatment tool main body 4 according to the tenth embodiment is referred to as a treatment tool main body 4I. Further, the sheath 8 according to the tenth embodiment is referred to as a sheath 8I. Further, the cap 11 according to the tenth embodiment is referred to as a cap 11I.
　図４０及び図４１は、実施の形態１０に係る処置具本体４Ｉの先端部分を示す図である。図４２及び図４３は、キャップ１１Ｉを示す図である。具体的に、図４０及び図４１は、処置具本体４Ｉの先端部分の外観を示す図である。なお、図４０ではチューブＴＵを取り外した状態としているのに対して、図４１ではチューブＴＵを取り付けた状態としている。図４２は、一対のリビングヒンジ１１Ｉ３，１１Ｉ４を折り曲げる前のキャップ１１Ｉの内側を示す図である。図４３は、一対のリビングヒンジ１１Ｉ３，１１Ｉ４を折り曲げた後のキャップ１１Ｉを示す図である。 40 and 41 are views showing the tip portion of the treatment tool main body 4I according to the tenth embodiment. 42 and 43 are views showing the cap 11I. Specifically, FIGS. 40 and 41 are views showing the appearance of the tip portion of the treatment tool main body 4I. In FIG. 40, the tube TU is removed, whereas in FIG. 41, the tube TU is attached. FIG. 42 is a diagram showing the inside of the cap 11I before bending the pair of living hinges 11I3 and 11I4. FIG. 43 is a diagram showing a cap 11I after bending a pair of living hinges 11I3 and 11I4.
　キャップ１１Ｉは、電気絶縁性を有するＰＥＥＫ等の樹脂材料によって構成されている。このキャップ１１Ｉは、図４２に示すように、一対のリビングヒンジ１１Ｉ３，１１Ｉ４によって互いに連結された第１，第２のキャップ１１Ｉ１，１１Ｉ２を備える。そして、一対のリビングヒンジ１１Ｉ３，１１Ｉ４を折り曲げ、第１，第２のキャップ１１Ｉ１，１１Ｉ２を組み合わせることによって、図４３に示すように、筒状のキャップ１１Ｉが形成される。これら第１，第２のキャップ１１Ｉ１，１１Ｉ２は、フック部１０１２の突端と中心軸Ａｘとを含む平面を基準として対称となる形状を有する。そして、当該第１，第２のキャップ１１Ｉ１，１１Ｉ２を組み合わせた状態において、キャップ１１Ｉは、図４０ないし図４３に示すように、係合部１９１（図４０，図４２，図４３）と、接続部１９２（図４０，図４２，図４３）と、露出部１９３とを備える。 The cap 11I is made of a resin material such as PEEK having electrical insulation. As shown in FIG. 42, the cap 11I includes first and second caps 11I1 and 11I2 connected to each other by a pair of living hinges 11I3 and 11I4. Then, by bending the pair of living hinges 11I3 and 11I4 and combining the first and second caps 11I1 and 11I2, a tubular cap 11I is formed as shown in FIG. 43. The first and second caps 11I1 and 11I2 have a shape symmetrical with respect to a plane including the tip of the hook portion 1012 and the central axis Ax. Then, in the state where the first and second caps 11I1 and 11I2 are combined, the cap 11I is connected to the engaging portion 191 (FIGS. 40, 42, 43) as shown in FIGS. 40 to 43. A portion 192 (FIG. 40, 42, 43) and an exposed portion 193 are provided.
　係合部１９１は、中心軸Ａｘと同軸となる円筒形状を有する。本実施の形態１０では、係合部１９１の外径寸法は、シース８Ｉの内径寸法よりも若干小さい。そして、係合部１９１の外周面には、図４０、図４２、または図４３に示すように、一対の係止突起１９１１が設けられている。
　一対の係止突起１９１１は、第１，第２のキャップ１１Ｉ１，１１Ｉ２にそれぞれ設けられている。より具体的に、一対の係止突起１９１１は、係合部１９１の外周面から中心軸Ａｘから離間する方向に突出するとともに、当該係合部１９１の基端から互いに対向しつつ先端側Ａｒ１に向けてそれぞれ直線状に延在する。 The engaging portion 191 has a cylindrical shape coaxial with the central axis Ax. In the tenth embodiment, the outer diameter dimension of the engaging portion 191 is slightly smaller than the inner diameter dimension of the sheath 8I. A pair of locking projections 1911 are provided on the outer peripheral surface of the engaging portion 191 as shown in FIGS. 40, 42, or 43.
The pair of locking projections 1911 are provided on the first and second caps 11I1 and 11I2, respectively. More specifically, the pair of locking projections 1911 project from the outer peripheral surface of the engaging portion 191 in a direction away from the central axis Ax, and face the distal end side Ar1 from the base end of the engaging portion 191. Each extends linearly toward each other.
　接続部１９２は、係合部１９１における先端側Ａｒ１の端部と露出部１９３における基端側Ａｒ２の端部とを接続する部分であり、中心軸Ａｘを囲む略円筒形状を有する。この接続部１９２は、係合部１７１よりも外径寸法が大きい。すなわち、キャップ１１Ｉの外周面において、接続部１９２と係合部１９１との間には、第１の段差部１９４（図４０，図４２，図４３）が設けられている。 The connecting portion 192 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 191 and the end portion of the proximal end side Ar2 in the exposed portion 193, and has a substantially cylindrical shape surrounding the central axis Ax. The connecting portion 192 has a larger outer diameter than the engaging portion 171. That is, on the outer peripheral surface of the cap 11I, a first step portion 194 (FIGS. 40, 42, 43) is provided between the connecting portion 192 and the engaging portion 191.
　露出部１９３は、中心軸Ａｘを囲む略円筒形状を有し、接続部１９２における先端側Ａｒ１の端部に設けられている。この露出部１９３において、接続部１９２と接続する基端側Ａｒ２の端部は、当該接続部１９２よりも外径寸法が大きい。すなわち、キャップ１１Ｉの外周面において、露出部１９３と接続部１９２との間には、第２の段差部１９５（図４０～図４３）が設けられている。そして、露出部１９３の外周面は、当該露出部１９３の径方向の外側に向かって張り出した張出面１９３１を有する。この張出面１９３１は、第２の段差部１９５に接する面であるとともに、本発明に係る張出部に相当する。 The exposed portion 193 has a substantially cylindrical shape surrounding the central axis Ax, and is provided at the end portion of the distal end side Ar1 in the connecting portion 192. In the exposed portion 193, the end portion of the base end side Ar2 connected to the connecting portion 192 has a larger outer diameter than the connecting portion 192. That is, on the outer peripheral surface of the cap 11I, a second step portion 195 (FIGS. 40 to 43) is provided between the exposed portion 193 and the connecting portion 192. The outer peripheral surface of the exposed portion 193 has an overhanging surface 1931 that projects outward in the radial direction of the exposed portion 193. This overhanging surface 1931 is a surface in contact with the second stepped portion 195 and corresponds to the overhanging portion according to the present invention.
　また、露出部１９３の外周面は、図４０ないし図４３に示すように、張出面１９３１と傾斜面１９３２と先端外周面１９３３とが基端側Ａｒ２から先端側Ａｒ１に向けて連設されることによって構成されている。
　張出面１９３１は、第２の段差部１９５に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて直線状に延在した面である。
　傾斜面１９３２は、張出面１９３１に接する位置から先端側Ａｒ１に向かうにしたがって径寸法が小さくなる面である。
　先端外周面１９３３は、傾斜面１９３２に接する位置から中心軸Ａｘに沿って先端側Ａｒ１に向けて略直線状に延在した面である。 Further, as shown in FIGS. 40 to 43, on the outer peripheral surface of the exposed portion 193, the overhanging surface 1931, the inclined surface 1932, and the tip outer peripheral surface 1933 are continuously provided from the proximal end side Ar2 toward the distal end side Ar1. It is composed of.
The overhanging surface 1931 is a surface extending linearly from a position in contact with the second step portion 195 toward the tip end side Ar1 along the central axis Ax.
The inclined surface 1932 is a surface whose diameter dimension decreases toward the tip side Ar1 from a position in contact with the overhanging surface 1931.
The tip outer peripheral surface 1933 is a surface extending substantially linearly from a position in contact with the inclined surface 1932 toward the tip side Ar1 along the central axis Ax.
　ここで、先端外周面１９３３を有する先端部１９０（図４０，図４１，図４３）における外径寸法は、キャップ１１Ｉの基端部である係合部１９１における外径寸法よりも小さい。また、当該先端部１９０における外径寸法は、フック部１０１２における第１の方向Ａｒ３の外形寸法よりも小さい。そして、当該先端部１９０は、細径化によって、処置具本体４Ｉを使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 190 (FIGS. 40, 41, 43) having the tip outer peripheral surface 1933 is smaller than the outer diameter dimension of the engaging portion 191 which is the base end portion of the cap 11I. Further, the outer diameter dimension of the tip portion 190 is smaller than the outer diameter dimension of the hook portion 1012 in the first direction Ar3. The tip portion 190 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4I by reducing the diameter.
　シース８Ｉにおける先端側Ａｒ１の端部には、図４０に示すように、先端から基端側Ａｒ２に向けて中心軸Ａｘに沿って直線状に切り欠かれ、一対の係止突起１９１１が係止される係止用切欠き部８７１が設けられている。この係止用切欠き部８７１は、先端側Ａｒ１に位置する幅狭部８７１１と、基端側Ａｒ２に位置し、当該幅狭部８７１１よりも幅寸法が大きい幅広部８７１２とを備える。 As shown in FIG. 40, the end portion of the sheath 8I on the distal end side Ar1 is cut out linearly along the central axis Ax from the distal end toward the proximal end side Ar2, and a pair of locking projections 1911 are locked. A locking notch 871 is provided. The locking notch 871 includes a narrow portion 8711 located on the distal end side Ar1 and a wide portion 8712 located on the proximal end side Ar2 and having a width larger than that of the narrow portion 8711.
　なお、本実施の形態１０に係る処置具２Ｉの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態１０に係るステップＳ３では、作業者は、キャップ１１Ｉの内側（図４２中、上方側）に柱状部１０１１が位置する状態で、一対のリビングヒンジ１１Ｅ３，１１Ｅ４を折り曲げ、第１，第２のキャップ１１Ｉ１，１１Ｉ２を組み合わせる。この状態では、フック部１０１２は、当該第１，第２のキャップ１１Ｉ１，１１Ｉ２を組み合わせたキャップ１１Ｉの先端側Ａｒ１から突出した状態となる。そして、作業者は、当該キャップ１１Ｉを基端側Ａｒ２に移動させ、一対の係止突起１９１１を係止用切欠き部８７１内に入り込ませつつ、係合部１９１をシース８Ｉの内部に挿通する。キャップ１１Ｉは、一対の係止突起１９１１が係止用切欠き部８７１における幅広部８７１２に対して係止することによって、シース８Ｉに対して取り付けられる。 In the method for manufacturing the treatment tool 2I according to the tenth embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S3 according to the tenth embodiment, the operator bends the pair of living hinges 11E3 and 11E4 with the columnar portion 1011 located inside the cap 11I (upper side in FIG. 42), and the first one. Combine the second caps 11I1 and 11I2. In this state, the hook portion 1012 is in a state of protruding from the tip end side Ar1 of the cap 11I in which the first and second caps 11I1 and 11I2 are combined. Then, the operator moves the cap 11I to the base end side Ar2, inserts the engaging portion 191 into the sheath 8I while inserting the pair of locking projections 1911 into the locking notch 871. .. The cap 11I is attached to the sheath 8I by a pair of locking projections 1911 locking to the wide portion 8712 in the locking notch 871.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、接続部１９２の外周面上に位置する。そして、本実施の形態１０では、張出面１９３１における径寸法は、チューブＴＵの先端における外径寸法と略同一である。また、張出面１９３１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８Ｉとキャップ１１Ｉとの境界を跨いでシース８Ｉの外周面とキャップ１１Ｉの外周面とをそれぞれ覆う位置に設けられている。また、シース８Ｉ及びキャップ１１Ｉにおいて、係合部１９１の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the connecting portion 192. Then, in the tenth embodiment, the diameter dimension on the overhanging surface 1931 is substantially the same as the outer diameter dimension at the tip of the tube TU. Further, the diameter dimension on the overhanging surface 1931 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8I and the cap 11I and covers the outer peripheral surface of the sheath 8I and the outer peripheral surface of the cap 11I, respectively. Further, in the sheath 8I and the cap 11I, the portion of the engaging portion 191 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
　以上説明した本実施の形態１０に係る処置具本体４Ｉを採用した場合であっても、上述した実施の形態１，６と同様の効果を奏する。 Even when the treatment tool main body 4I according to the tenth embodiment described above is adopted, the same effect as that of the first and sixth embodiments described above is obtained.
（実施の形態１１）
　次に、本実施の形態１１について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態１１では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（振動伝達部材１０及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態１１に係る処置具２を処置具２Ｊと記載する。また、本実施の形態１１に係る処置具本体４を処置具本体４Ｊと記載する。さらに、本実施の形態１１に係る振動伝達部材１０を振動伝達部材１０Ｊと記載する。また、本実施の形態１１に係るキャップ１１をキャップ１１Ｊと記載する。 (Embodiment 11)
Next, the eleventh embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the eleventh embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the vibration transmission member 10 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the eleventh embodiment will be referred to as the treatment tool 2J. Further, the treatment tool main body 4 according to the eleventh embodiment is referred to as a treatment tool main body 4J. Further, the vibration transmission member 10 according to the eleventh embodiment is referred to as a vibration transmission member 10J. Further, the cap 11 according to the present embodiment 11 is referred to as a cap 11J.
　図４４は、実施の形態１１に係る処置具本体４Ｊの先端部分を示す図である。なお、図４４では、説明の便宜上、チューブＴＵを一点鎖線で図示している。図４５及び図４６は、振動伝達部材１０Ｊの先端部分を示す図である。具体的に、図４５は、第２の方向Ａｒ４に沿って振動伝達部材１０Ｊを見た図である。図４６は、第１の方向Ａｒ３に沿って振動伝達部材１０Ｊを見た図である。 FIG. 44 is a diagram showing a tip portion of the treatment tool main body 4J according to the eleventh embodiment. In FIG. 44, the tube TU is shown by a alternate long and short dash line for convenience of explanation. 45 and 46 are views showing the tip portion of the vibration transmission member 10J. Specifically, FIG. 45 is a view of the vibration transmitting member 10J along the second direction Ar4. FIG. 46 is a view of the vibration transmitting member 10J along the first direction Ar3.
　振動伝達部材１０Ｊは、上述した実施の形態１において説明した振動伝達部材１０に対して、エンドエフェクタ１０１の形状が異なる。なお、以下では、説明の便宜上、本実施の形態１１に係るエンドエフェクタ１０１をエンドエフェクタ１０１Ｊと記載する。
　エンドエフェクタ１０１Ｊは、図４４ないし図４６に示すように、中心軸Ａｘに沿って延在する柱状部１０１３と、当該柱状部１０１３における先端側Ａｒ１の端部に設けられたヘラ部１０１４とを備える。
　ヘラ部１０１４は、柱状部１０１３の幅寸法（第１の方向Ａｒ３の外形寸法）よりも大きい幅寸法（第１の方向Ａｒ３の外形寸法）を有し、先端側Ａｒ１に向かうにしたがって第２の方向Ａｒ４に沿って湾曲する。 The vibration transmission member 10J has a different shape of the end effector 101 from the vibration transmission member 10 described in the first embodiment described above. In the following, for convenience of explanation, the end effector 101 according to the eleventh embodiment will be referred to as an end effector 101J.
As shown in FIGS. 44 to 46, the end effector 101J includes a columnar portion 1013 extending along the central axis Ax and a spatula portion 1014 provided at the end of the distal end side Ar1 in the columnar portion 1013. ..
The spatula portion 1014 has a width dimension (external dimension of the first direction Ar3) larger than the width dimension of the columnar portion 1013 (external dimension of the first direction Ar3), and the second is directed toward the tip side Ar1. It curves along the direction Ar4.
　キャップ１１Ｊは、電気絶縁性を有するＰＥＥＫ、ＰＴＦＥ、またはＰＦＡ等の樹脂材料によって構成されている。このキャップ１１Ｊは、図４４に示すように、係合部２０１と、接続部２０２と、先端部２０３とを備える。
　係合部２０１は、上述した実施の形態１において説明した係合部１１１と同様の形状を有する。すなわち、係合部２０１は、上述した実施の形態１において説明した一対の爪部１１１２と同様の一対の爪部２０１１（図４４）を備える。本実施の形態１１では、係合部２０１の内径寸法は、ヘラ部１０１４の幅寸法よりも若干大きい。 The cap 11J is made of a resin material such as PEEK, PTFE, or PFA having electrical insulation. As shown in FIG. 44, the cap 11J includes an engaging portion 201, a connecting portion 202, and a tip portion 203.
The engaging portion 201 has the same shape as the engaging portion 111 described in the first embodiment described above. That is, the engaging portion 201 includes a pair of claw portions 2011 (FIG. 44) similar to the pair of claw portions 1112 described in the first embodiment described above. In the eleventh embodiment, the inner diameter of the engaging portion 201 is slightly larger than the width dimension of the spatula portion 1014.
　接続部２０２は、係合部２０１における先端側Ａｒ１の端部と先端部２０３における基端側Ａｒ２の端部とを接続する部分であり、中心軸Ａｘを囲む筒形状を有する。この接続部２０２において、係合部２０１と接続する基端側Ａｒ２の端部は、係合部２０１よりも外径寸法が大きい。すなわち、キャップ１１Ｊの外周面において、接続部２０２と係合部２０１との間には、第１の段差部２０４（図４４）が設けられている。
　この接続部２０２において、中心軸Ａｘに沿う方向の略中央部分は、第２の方向Ａｒ４の外形寸法（厚み寸法）が他の部分よりも小さい。そして、接続部２０２は、当該略中央部分から先端側Ａｒ１及び基端側Ａｒ２にそれぞれ向かうにしたがって当該厚み寸法が大きくなる。また、接続部２０２において、当該略中央部分は、第１の方向Ａｒ３の外形寸法（幅寸法）が他の部分よりも小さい。そして、接続部２０２は、当該略中央部分から先端側Ａｒ１及び基端側Ａｒ２にそれぞれ向かうにしたがって当該幅寸法が大きくなる。
　以下では、接続部２０２において、第１，第２の方向Ａｒ３，Ａｒ４の各外形寸法が最も小さくなる当該略中央部分を中間部２０５（図４４）と記載する。
　ここで、中間部２０５における第１の方向Ａｒ３の外形寸法は、キャップ１１Ｊにおける他の部位における第１の方向Ａｒ３の外形寸法よりも小さく、さらに、ヘラ部１０１４の幅寸法よりも小さい。そして、当該中間部２０５は、細径化によって、処置具本体４Ｊを使用する術者等の視野を確保する機能を有する。 The connecting portion 202 is a portion that connects the end portion of the distal end side Ar1 in the engaging portion 201 and the end portion of the proximal end side Ar2 in the distal end portion 203, and has a tubular shape surrounding the central axis Ax. In this connecting portion 202, the end portion of the base end side Ar2 connected to the engaging portion 201 has a larger outer diameter than the engaging portion 201. That is, on the outer peripheral surface of the cap 11J, a first step portion 204 (FIG. 44) is provided between the connecting portion 202 and the engaging portion 201.
In the connection portion 202, the external dimension (thickness dimension) of the second direction Ar4 is smaller in the substantially central portion in the direction along the central axis Ax than in the other portions. The thickness of the connecting portion 202 increases from the substantially central portion toward the distal end side Ar1 and the proximal end side Ar2, respectively. Further, in the connecting portion 202, the outer dimension (width dimension) of the first direction Ar3 is smaller in the substantially central portion than in the other portions. Then, the width dimension of the connecting portion 202 increases from the substantially central portion toward the distal end side Ar1 and the proximal end side Ar2, respectively.
In the following, in the connection portion 202, the substantially central portion having the smallest external dimensions in the first and second directions Ar3 and Ar4 will be referred to as an intermediate portion 205 (FIG. 44).
Here, the external dimension of the first direction Ar3 in the intermediate portion 205 is smaller than the external dimension of the first direction Ar3 in the other portion of the cap 11J, and further smaller than the width dimension of the spatula portion 1014. The intermediate portion 205 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4J by reducing the diameter.
　本実施の形態１１では、中間部２０５の内形寸法は、以下の通りである。
　すなわち、中間部２０５における第１の方向Ａｒ３の内形寸法は、ヘラ部１０１４の幅寸法よりも小さい。また、中間部２０５における第２の方向Ａｒ４の内形寸法は、ヘラ部１０１４の厚み寸法（第２の方向Ａｒ４の外形寸法）よりも大きい。
　一方、接続部２０２において、中間部２０５以外の他の部分は、ヘラ部１０１４を挿通可能とする内形寸法を有する。 In the eleventh embodiment, the internal dimensions of the intermediate portion 205 are as follows.
That is, the internal dimension of the first direction Ar3 in the intermediate portion 205 is smaller than the width dimension of the spatula portion 1014. Further, the internal dimension of the second direction Ar4 in the intermediate portion 205 is larger than the thickness dimension of the spatula portion 1014 (the external dimension of the second direction Ar4).
On the other hand, in the connecting portion 202, the portions other than the intermediate portion 205 have internal dimensions that allow the spatula portion 1014 to be inserted.
　以上説明した接続部２０２には、第１の方向Ａｒ３における両端側において、中間部２０５を跨ぎ、中心軸Ａｘに沿って直線状にそれぞれ延在したスリット２０６（図４４）が設けられている。
　このスリット２０６の幅寸法は、ヘラ部１０１４の厚み寸法よりも若干大きい。 The connection portion 202 described above is provided with slits 206 (FIG. 44) extending linearly along the central axis Ax, straddling the intermediate portion 205 on both ends in the first direction Ar3.
The width dimension of the slit 206 is slightly larger than the thickness dimension of the spatula portion 1014.
　先端部２０３は、中心軸Ａｘを囲む筒形状を有し、接続部２０２における先端側Ａｒ１の端部に設けられている。この先端部２０３は、接続部２０２における先端側Ａｒ１の端部よりも第１，第２の方向Ａｒ３，Ａｒ４の各外形寸法が大きい。すなわち、キャップ１１Ｊの外周面において、先端部２０３と接続部２０２との間には、第２の段差部２０７（図４４）が設けられている。以下では、説明の便宜上、先端部２０３の外周面を張出面２０３１と記載する。この張出面２０３１は、本発明に係る張出部に相当する。
　本実施の形態１１では、先端部２０３は、ヘラ部１０１４を挿通可能とする内形寸法を有する。 The tip portion 203 has a tubular shape surrounding the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 202. The tip portion 203 has larger external dimensions in the first and second directions Ar3 and Ar4 than the end portion of the tip side Ar1 in the connection portion 202. That is, on the outer peripheral surface of the cap 11J, a second step portion 207 (FIG. 44) is provided between the tip portion 203 and the connection portion 202. Hereinafter, for convenience of explanation, the outer peripheral surface of the tip portion 203 will be referred to as an overhanging surface 2031. This overhanging surface 2031 corresponds to the overhanging portion according to the present invention.
In the eleventh embodiment, the tip portion 203 has an internal dimension that allows the spatula portion 1014 to be inserted.
　ここで、先端部２０３における第２の方向Ａｒ４の外形寸法は、キャップ１１Ｊの基端部である係合部２０１における外径寸法よりも小さい。そして、当該先端部２０３は、中間部２０５とともに、細径化によって、処置具本体４Ｊを使用する術者等の視野を確保する機能を有する。 Here, the external dimension of the second direction Ar4 at the tip portion 203 is smaller than the outer diameter dimension of the engaging portion 201 which is the base end portion of the cap 11J. The tip portion 203, together with the intermediate portion 205, has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4J by reducing the diameter.
　なお、本実施の形態１１に係る処置具２Ｊの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態１１に係るステップＳ３では、作業者は、キャップ１１Ｊの基端側Ａｒ２から当該キャップ１１Ｊの内部にエンドエフェクタ１０１Ｊを挿通する。そして、作業者は、スリット２０６内にヘラ部１０１４における第１の方向Ａｒ３の端部を入り込ませつつ、キャップ１１Ｊを基端側Ａｒ２に移動させることによって、当該ヘラ部１０１４を当該キャップ１１Ｊの先端側Ａｒ１から突出させる。また、作業者は、キャップ１１Ｊを基端側Ａｒ２に移動させ、係合部２０１をシース８の内部に挿通する。そして、キャップ１１Ｊは、爪部２０１１が係止用開口部８１１に対して係止することによって、シース８に対して取り付けられる。すなわち、キャップ１１Ｊは、スナップフィット方式によって、シース８に対して取り付けられる。 In the method for manufacturing the treatment tool 2J according to the eleventh embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S3 according to the eleventh embodiment, the operator inserts the end effector 101J from the base end side Ar2 of the cap 11J into the inside of the cap 11J. Then, the operator moves the cap 11J to the proximal end side Ar2 while inserting the end of the first direction Ar3 in the spatula portion 1014 into the slit 206, whereby the spatula portion 1014 is moved to the tip of the cap 11J. It protrudes from the side Ar1. Further, the operator moves the cap 11J to the base end side Ar2 and inserts the engaging portion 201 into the inside of the sheath 8. Then, the cap 11J is attached to the sheath 8 by locking the claw portion 2011 to the locking opening 811. That is, the cap 11J is attached to the sheath 8 by the snap-fit method.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図４４に示すように、接続部２０２の外周面上に位置する。そして、本実施の形態１１では、張出面２０３１における第１，第２の方向Ａｒ３，Ａｒ４の各外形寸法は、チューブＴＵの先端における第１，第２の方向Ａｒ３，Ａｒ４の各外形寸法と略同一である。また、張出面２０３１における第１，第２の方向Ａｒ３，Ａｒ４の各外形寸法が、それぞれ、チューブＴＵの先端における第１，第２の方向Ａｒ３，Ａｒ４の各外形寸法以下であってもよいし、チューブＴＵの先端における第１，第２の方向Ａｒ３，Ａｒ４の各外形寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８とキャップ１１Ｊとの境界を跨いでシース８の外周面とキャップ１１Ｊの外周面とをそれぞれ覆う位置に設けられている。また、シース８及びキャップ１１Ｊにおいて、係合部２０１の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the connecting portion 202 as shown in FIG. 44. In the eleventh embodiment, the external dimensions of the first and second directions Ar3 and Ar4 on the overhanging surface 2031 are abbreviated as the external dimensions of the first and second directions Ar3 and Ar4 at the tip of the tube TU. It is the same. Further, the external dimensions of the first and second directions Ar3 and Ar4 on the overhanging surface 2031 may be equal to or less than the external dimensions of the first and second directions Ar3 and Ar4 at the tip of the tube TU, respectively. , It may be equal to or larger than the external dimensions of Ar3 and Ar4 in the first and second directions at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8 and the cap 11J and covers the outer peripheral surface of the sheath 8 and the outer peripheral surface of the cap 11J, respectively. Further, in the sheath 8 and the cap 11J, the portion of the engaging portion 201 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
　以上説明した本実施の形態１１に係る処置具本体４Ｊを採用した場合であっても、上述した実施の形態１と同様の効果を奏する。 Even when the treatment tool main body 4J according to the eleventh embodiment described above is adopted, the same effect as that of the first embodiment described above is obtained.
（実施の形態１２）
　次に、本実施の形態１２について説明する。
　以下の説明では、上述した実施の形態１と同様の構成には同一符号を付し、その詳細な説明は省略または簡略化する。
　本実施の形態１２では、上述した実施の形態１に対して、処置具本体４の先端部分の構成（振動伝達部材１０及びキャップ１１の構成）が異なる。
　なお、以下では、説明の便宜上、本実施の形態１２に係る処置具２を処置具２Ｋと記載する。また、本実施の形態１２に係る処置具本体４を処置具本体４Ｋと記載する。さらに、本実施の形態１２に係るキャップ１１をキャップ１１Ｋと記載する。ここで、本実施の形態１２に係る振動伝達部材１０については、上述した実施の形態１１において説明した振動伝達部材１０Ｊと同様の形状であるため、振動伝達部材１０Ｊと記載する。 (Embodiment 12)
Next, the twelfth embodiment will be described.
In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
In the twelfth embodiment, the configuration of the tip portion of the treatment tool main body 4 (the configuration of the vibration transmission member 10 and the cap 11) is different from that of the first embodiment described above.
In the following, for convenience of explanation, the treatment tool 2 according to the twelfth embodiment will be referred to as a treatment tool 2K. Further, the treatment tool main body 4 according to the twelfth embodiment is referred to as a treatment tool main body 4K. Further, the cap 11 according to the twelfth embodiment is referred to as a cap 11K. Here, the vibration transmission member 10 according to the twelfth embodiment is referred to as the vibration transmission member 10J because it has the same shape as the vibration transmission member 10J described in the above-described eleventh embodiment.
　図４７及び図４８は、実施の形態１２に係る処置具本体４Ｋの先端部分を示す図である。具体的に、図４７は、キャップ１１Ｋの内部にヘラ部１０１４を挿通する状態を示す図である。図４８は、処置具本体４Ｋの外観を示す図である。
　キャップ１１Ｋは、電気絶縁性を有するＰＴＦＥまたはＰＦＡ等の樹脂材料によって構成されている。このキャップ１１Ｋは、図４７または図４８に示すように、第１の部材２１１と、第２の部材２１２とを備える。 47 and 48 are views showing the tip portion of the treatment tool main body 4K according to the twelfth embodiment. Specifically, FIG. 47 is a diagram showing a state in which the spatula portion 1014 is inserted into the inside of the cap 11K. FIG. 48 is a diagram showing the appearance of the treatment tool main body 4K.
The cap 11K is made of a resin material such as PTFE or PFA having electrical insulation. As shown in FIG. 47 or FIG. 48, the cap 11K includes a first member 211 and a second member 212.
　第１の部材２１１は、第２の部材２１２に対して基端側Ａｒ２に設けられる。この第１の部材２１１は、図４７に示すように、上述した実施の形態１１において説明した係合部２０１と同様の形状を有する係合部２１３を備える。すなわち、係合部２１３は、上述した実施の形態１１において説明した一対の爪部２０１１と同様の一対の爪部２１３１を備える。 The first member 211 is provided on the proximal end side Ar2 with respect to the second member 212. As shown in FIG. 47, the first member 211 includes an engaging portion 213 having the same shape as the engaging portion 201 described in the above-described eleventh embodiment. That is, the engaging portion 213 includes a pair of claw portions 2131 similar to the pair of claw portions 2011 described in the above-described eleventh embodiment.
　第２の部材２１２は、係合部２１３における先端側Ａｒ１の端部から先端側Ａｒ１に向けて延在した連結部２１４（図４７）によって第２の方向Ａｒ４に沿って揺動可能に第１の部材２１１に対して連結されている。この第２の部材２１２は、図４７に示すように、接続部２１５と、先端部２１６とを備える。
　接続部２１５は、中心軸Ａｘと同軸となる円筒形状を有し、連結部２１４における先端側Ａｒ１の端部に対して接続する。本実施の形態１２では、接続部２１５の内径寸法は、ヘラ部１０１４の幅寸法よりも小さい。 The first member 212 is swingable along the second direction Ar4 by the connecting portion 214 (FIG. 47) extending from the end portion of the distal end side Ar1 in the engaging portion 213 toward the distal end side Ar1. It is connected to the member 211 of. As shown in FIG. 47, the second member 212 includes a connecting portion 215 and a tip portion 216.
The connecting portion 215 has a cylindrical shape coaxial with the central axis Ax, and is connected to the end portion of the distal end side Ar1 in the connecting portion 214. In the twelfth embodiment, the inner diameter dimension of the connecting portion 215 is smaller than the width dimension of the spatula portion 1014.
　先端部２１６は、中心軸Ａｘと同軸となる略円筒形状を有し、接続部２１５における先端側Ａｒ１の端部に設けられている。この先端部２１６は、接続部２１５よりも外径寸法が大きい。すなわち、第２の部材２１２の外周面において、先端部２１６と接続部２１５との間には、段差部２１７（図４７，図４８）が設けられている。そして、先端部２１６の外周面は、当該先端部２１６の径方向の外側に向かって張り出した張出面２１６１（図４８）を有する。この張出面２１６１は、段差部２１７に接する面であるとともに、本発明に係る張出部に相当する。
　本実施の形態１２では、先端部２１６の内径寸法は、ヘラ部１０１４の幅寸法よりも小さい。 The tip portion 216 has a substantially cylindrical shape coaxial with the central axis Ax, and is provided at the end portion of the tip side Ar1 in the connection portion 215. The tip portion 216 has a larger outer diameter than the connection portion 215. That is, on the outer peripheral surface of the second member 212, a step portion 217 (FIGS. 47 and 48) is provided between the tip portion 216 and the connecting portion 215. The outer peripheral surface of the tip portion 216 has an overhanging surface 2161 (FIG. 48) that projects outward in the radial direction of the tip portion 216. The overhanging surface 2161 is a surface in contact with the stepped portion 217 and corresponds to the overhanging portion according to the present invention.
In the twelfth embodiment, the inner diameter dimension of the tip portion 216 is smaller than the width dimension of the spatula portion 1014.
　ここで、先端部２１６における外径寸法は、キャップ１１Ｋの基端部である係合部２１３における外径寸法よりも小さい。また、当該先端部２１６における第１の方向Ａｒ３の外形寸法は、ヘラ部１０１４の幅寸法よりも小さい。そして、当該先端部２１６は、細径化によって、処置具本体４Ｋを使用する術者等の視野を確保する機能を有する。 Here, the outer diameter dimension of the tip portion 216 is smaller than the outer diameter dimension of the engaging portion 213 which is the base end portion of the cap 11K. Further, the external dimension of the first direction Ar3 at the tip portion 216 is smaller than the width dimension of the spatula portion 1014. The tip portion 216 has a function of securing a field of view of an operator or the like who uses the treatment tool main body 4K by reducing the diameter.
　なお、本実施の形態１２に係る処置具２Ｋの製造方法では、上述した実施の形態１において説明した処置具２の製造方法（図８）に対して、ステップＳ３が異なる。
　本実施の形態１２に係るステップＳ３では、作業者は、図４７に示すように、係合部２１３の基端側Ａｒ２から当該係合部２１３の内部にエンドエフェクタ１０１Ｊを挿通する。また、作業者は、キャップ１１ＫがＰＴＦＥまたはＰＦＡ等の比較的に柔らかい材料によって構成されているため、当該キャップ１１Ｋを変形させつつ、接続部２１５の基端側から当該接続部２１５の内部にエンドエフェクタ１０１Ｊを挿通する。これによって、ヘラ部１０１４は、先端部２１６の先端側Ａｒ１から突出する。ここで、第２の部材２１２は、エンドエフェクタ１０１Ｊが内部に挿通されることに伴い、ヘラ部１０１４の湾曲形状に倣って、図４７中、上方側から下方側に向けて当該第２の部材２１２の中心軸が中心軸Ａｘに合致するまで移動する。そして、キャップ１１Ｋは、爪部２１３１が係止用開口部８１１に対して係止することによって、シース８に対して取り付けられる。すなわち、キャップ１１Ｋは、スナップフィット方式によって、シース８に対して取り付けられる。 In the method for manufacturing the treatment tool 2K according to the twelfth embodiment, step S3 is different from the method for manufacturing the treatment tool 2 described in the above-described first embodiment (FIG. 8).
In step S3 according to the twelfth embodiment, as shown in FIG. 47, the operator inserts the end effector 101J from the proximal end side Ar2 of the engaging portion 213 into the inside of the engaging portion 213. Further, since the cap 11K is made of a relatively soft material such as PTFE or PFA, the operator can deform the cap 11K and end the cap 11K from the base end side of the connection portion 215 to the inside of the connection portion 215. Insert the effector 101J. As a result, the spatula portion 1014 protrudes from the tip end side Ar1 of the tip portion 216. Here, the second member 212 is the second member from the upper side to the lower side in FIG. 47, following the curved shape of the spatula portion 1014 as the end effector 101J is inserted into the inside. Move until the central axis of 212 matches the central axis Ax. Then, the cap 11K is attached to the sheath 8 by locking the claw portion 2131 to the locking opening 811. That is, the cap 11K is attached to the sheath 8 by the snap-fit method.
　そして、ステップＳ４において、チューブＴＵを取り付けた状態では、当該チューブＴＵの先端は、図４８に示すように、接続部２１５の外周面上に位置する。そして、本実施の形態１２では、張出面２１６１における径寸法は、チューブＴＵの先端における外径寸法と略同一である。また、張出面２１６１における径寸法が、チューブＴＵの先端における外径寸法以下であってもよいし、チューブＴＵの先端における外径寸法以上であってもよい。
　以上のように、チューブＴＵは、シース８とキャップ１１Ｋとの境界を跨いでシース８の外周面とキャップ１１Ｋの外周面とをそれぞれ覆う位置に設けられている。また、シース８及びキャップ１１Ｋにおいて、係合部２１３の部分は、径方向に重なる本発明に係るオーバーラップ領域に相当する。そして、チューブＴＵは、当該オーバーラップ領域を覆う。 Then, in step S4, when the tube TU is attached, the tip of the tube TU is located on the outer peripheral surface of the connecting portion 215 as shown in FIG. 48. Then, in the twelfth embodiment, the diameter dimension on the overhanging surface 2161 is substantially the same as the outer diameter dimension at the tip of the tube TU. Further, the diameter dimension of the overhanging surface 2161 may be equal to or less than the outer diameter dimension at the tip of the tube TU, or may be greater than or equal to the outer diameter dimension at the tip of the tube TU.
As described above, the tube TU is provided at a position that straddles the boundary between the sheath 8 and the cap 11K and covers the outer peripheral surface of the sheath 8 and the outer peripheral surface of the cap 11K, respectively. Further, in the sheath 8 and the cap 11K, the portion of the engaging portion 213 corresponds to the overlapping region according to the present invention that overlaps in the radial direction. Then, the tube TU covers the overlap region.
　以上説明した本実施の形態１２に係る処置具本体４Ｋを採用した場合であっても、上述した実施の形態１と同様の効果を奏する。 Even when the treatment tool main body 4K according to the 12th embodiment described above is adopted, the same effect as that of the 1st embodiment described above is obtained.
（その他の実施形態）
　ここまで、本発明を実施するための形態を説明してきたが、本発明は上述した実施の形態１～１２によってのみ限定されるべきものではない。
　上述した実施の形態１～１２では、本発明に係る処置具として、対象部位に対して超音波エネルギ及び高周波エネルギの双方を付与する構成としていたが、これに限らず、超音波エネルギ、高周波エネルギ、及び熱エネルギの少なくともいずれかのエネルギを付与する構成としても構わない。ここで、「対象部位に対して熱エネルギを付与する」とは、ヒータ等に発生した熱を対象部位に対して伝達することを意味する。 (Other embodiments)
Although the embodiments for carrying out the present invention have been described so far, the present invention should not be limited only to the above-described embodiments 1 to 12.
In the above-described embodiments 1 to 12, the treatment tool according to the present invention is configured to apply both ultrasonic energy and high frequency energy to the target portion, but the present invention is not limited to this, and ultrasonic energy and high frequency energy are not limited to this. , And at least one of the thermal energies may be applied. Here, "giving heat energy to the target portion" means transmitting the heat generated in the heater or the like to the target portion.
　上述した実施の形態１～１２において、ステップＳ２とステップＳ３とを逆に行っても構わない。 In the above-described embodiments 1 to 12, steps S2 and step S3 may be performed in reverse.
　上述した実施の形態１において、キャップ１１として、第１，第２のスリット１１６，１１７を設けない構成とするとともに、当該キャップ１１を弾性部材によって構成する。そして、ステップＳ３では、キャップ１１を変形させつつ、当該キャップ１１の内部にエンドエフェクタ１０１を挿通し、当該キャップ１１の先端側Ａｒ１から当該エンドエフェクタ１０１を突出させる。 In the first embodiment described above, the cap 11 is configured not to have the first and second slits 116 and 117, and the cap 11 is configured by an elastic member. Then, in step S3, the end effector 101 is inserted into the inside of the cap 11 while deforming the cap 11, and the end effector 101 is projected from the tip end side Ar1 of the cap 11.
　１　処置システム
　２，２Ａ，２Ｂ，２Ｄ～２Ｋ　処置具
　３　制御装置
　４，４Ａ，４Ｂ，４Ｄ～４Ｋ　処置具本体
　５　超音波トランスデューサ
　６　ハウジング
　７　回転ノブ
　８，８Ａ～８Ｄ，８Ｆ，８Ｉ　シース
　９　保持部
　１０，１０Ｊ　振動伝達部材
　１１，１１Ａ，１１Ｂ，１１Ｄ～１１Ｋ　キャップ
　１１Ｅ１　第１のキャップ
　１１Ｅ２　第２のキャップ
　１１Ｅ３，１１Ｅ４　リビングヒンジ
　１１Ｇ１　第１のキャップ
　１１Ｇ２　第２のキャップ
　１１Ｈ１　第１のキャップ
　１１Ｈ２　第２のキャップ
　１１Ｉ１　第１のキャップ
　１１Ｉ２　第２のキャップ
　１１Ｉ３，１１Ｉ４　リビングヒンジ
　６１　第１のハウジング
　６２　第２のハウジング
　６３　スイッチ
　７１　基部
　７２　爪部
　９１　フランジ部
　９２　Ｏリング
　１０１，１０１Ｊ　エンドエフェクタ
　１１０　先端部
　１１１　係合部
　１１２　接続部
　１１３　露出部
　１１４　第１の段差部
　１１５　第２の段差部
　１１６　第１のスリット
　１１７　第２のスリット
　１２０　先端部
　１２１　係合部
　１２２　露出部
　１２３　段差部
　１２４　スリット
　１３０　先端部
　１３１　係合部
　１３２　露出部
　１３３　段差部
　１３４　スリット
　１４０　先端部
　１４１　係合部
　１４２　接続部
　１４３　露出部
　１４４　第１の段差部
　１４５　第２の段差部
　１４６　スリット
　１５１　係合部
　１５２　接続部
　１５３　先端部
　１５４　第１の段差部
　１５５　第２の段差部
　１６０　先端部
　１６１　係合部
　１６２　接続部
　１６３　露出部
　１６４　段差部
　１６５　スリット
　１７１　係合部
　１７２　接続部
　１７３　先端部
　１７４　第１の段差部
　１７５　第２の段差部
　１８１　係合部
　１８２　接続部
　１８３　先端部
　１８４　段差部
　１９０　先端部
　１９１　係合部
　１９２　接続部
　１９３　露出部
　１９４　第１の段差部
　１９５　第２の段差部
　２０１　係合部
　２０２　接続部
　２０３　先端部
　２０４　第１の段差部
　２０５　中間部
　２０６　スリット
　２０７　第２の段差部
　２１１　第１の部材
　２１２　第２の部材
　２１３　係合部
　２１４　連結部
　２１５　接続部
　２１６　先端部
　２１７　段差部
　６１１　基端側ハウジング部
　６１２　先端側ハウジング部
　６２１　ボス
　８１１　係止用開口部
　８１２　位置決め用切欠き部
　８２１　平坦部
　８２２　係止用開口部
　８３１　スリット
　８４１　傾斜面
　８５１　変形させた部分
　８６１　スリット
　８６２　変形させた部分
　８７１　係止用切欠き部
　１０１１　柱状部
　１０１２　フック部
　１０１３　柱状部
　１０１４　ヘラ部
　１１１１　切欠き部
　１１１２　爪部
　１１１３　位置決め部
　１１２１　第１の傾斜面
　１１２２　第１の先端外周面
　１１３１　張出面
　１１３２　第２の傾斜面
　１１３３　第２の先端外周面
　１２１１　係合部本体
　１２１２　腕部
　１２１３　凸部
　１２２１　張出面
　１２２２　傾斜面
　１２２３　先端外周面
　１３１１　切欠き部
　１３１２　爪部
　１３２１　張出面
　１３２２　傾斜面
　１３２３　先端外周面
　１４１１　環状凹部
　１４２１　基端外周面
　１４２２　第１の傾斜面
　１４２３　第１の先端外周面
　１４３１　張出面
　１４３２　第２の傾斜面
　１４３３　第２の先端外周面
　１５１１　環状凹部
　１５２１　基端外周面
　１５２２　傾斜面
　１５２３　先端外周面
　１５３１　張出面
　１６１１　環状凹部
　１６２１　第１の傾斜面
　１６２２　第１の先端外周面
　１６３１　張出面
　１６３２　第２の傾斜面
　１６３３　第２の先端外周面
　１７１１　凸部
　１７２１　基端外周面
　１７２２　傾斜面
　１７２３　先端外周面
　１７３１　張出面
　１８１１　係合部本体
　１８１２　腕部
　１８２１　傾斜面
　１８２２　先端外周面
　１８３１　張出面
　１９１１　係止突起
　１９３１　張出面
　１９３２　傾斜面
　１９３３　先端外周面
　２０１１　爪部
　２０３１　張出面
　２１３１　爪部
　２１６１　張出面
　８７１１　幅狭部
　８７１２　幅広部
　Ａｒ１　先端側
　Ａｒ２　基端側
　Ａｒ３　第１の方向
　Ａｒ４　第２の方向
　Ａｘ　中心軸
　Ｃ　電気ケーブル
　ＴＵ　チューブ 1 Treatment system 2, 2A, 2B, 2D to 2K Treatment tool 3 Control device 4, 4A, 4B, 4D to 4K Treatment tool body 5 Ultrasonic transducer 6 Housing 7 Rotating knob 8, 8A to 8D, 8F, 8I sheath 9 Holding Part 10,10J Vibration transmission member 11, 11A, 11B, 11D-11K Cap 11E1 First cap 11E2 Second cap 11E3, 11E4 Living hinge 11G1 First cap 11G2 Second cap 11H1 First cap 11H2 Second Cap 11I1 1st cap 11I2 2nd cap 11I3, 11I4 Living hinge 61 1st housing 62 2nd housing 63 Switch 71 Base 72 Claw 91 Flange 92 O-ring 101, 101J End effector 110 Tip 111 Joint part 112 Connection part 113 Exposed part 114 First step part 115 Second step part 116 First slit 117 Second slit 120 Tip part 121 Engagement part 122 Exposed part 123 Step part 124 Slit 130 Tip part 131 Joint part 132 Exposed part 133 Step part 134 Slit 140 Tip part 141 Engagement part 142 Connection part 143 Exposed part 144 First step part 145 Second step part 146 Slit 151 Engagement part 152 Connection part 153 Tip part 154 First Step 155 Second step 160 Tip 161 Engagement 162 Connection 163 Exposed 164 Step 165 Slit 171 Engagement 172 Connection 173 Tip 174 First step 175 Second step 181 Engagement part 182 Connection part 183 Tip part 184 Step part 190 Tip part 191 Engagement part 192 Connection part 193 Exposed part 194 First step part 195 Second step part 201 Engagement part 202 Connection part 203 Tip part 204 1st Step 205 Intermediate step 206 Slit 207 Second step 211 First member 212 Second member 213 Engagement part 214 Connecting part 215 Connection part 216 Tip part 217 Step part 611 Base end side housing part 612 Tip side housing Part 621 Boss 811 Locking opening 812 Positioning notch 821 Flat part 822 Locking opening 831 Slit 841 Inclined surface 851 Deformed part 861 Slit 862 Deformed part 871 Locking notch part 1011 Column part 1012 Hook part 1013 Column part 1014 Spatula part 1111 Notch part 1112 Part 1113 Positioning part 1121 First inclined surface 1122 First tip outer peripheral surface 1131 Overhanging surface 1132 Second inclined surface 1133 Second tip outer peripheral surface 1211 Engaging part main body 1212 Arm part 1213 Convex part 1221 Overhanging surface 1222 Inclined surface 1223 Tip outer peripheral surface 1311 Notch 1312 Claw part 1321 Overhanging surface 1322 Inclined surface 1323 Tip outer peripheral surface 1411 Circular recess 1421 Base end outer peripheral surface 1422 First inclined surface 1423 First tip outer peripheral surface 1431 Overhanging surface 1432 Second inclined Surface 1433 2nd tip outer peripheral surface 1511 annular recess 1521 base end outer peripheral surface 1522 inclined surface 1523 tip outer peripheral surface 1531 overhanging surface 1611 annular recess 1621 first inclined surface 1622 first tip outer peripheral surface 1631 overhanging surface 1632 second inclined Surface 1633 Second tip outer peripheral surface 1711 Convex part 1721 Base end outer peripheral surface 1722 Inclined surface 1723 Tip outer peripheral surface 1731 Overhanging surface 1811 Engaging part main body 1812 Arm 1821 Inclined surface 1822 Tip outer peripheral surface 1831 Overhanging surface 1911 Locking protrusion 1931 Outer surface 1932 Inclined surface 1933 Tip outer peripheral surface 2011 Claw part 2031 Overhanging surface 2131 Claw part 2161 Overhanging surface 8711 Narrow part 8712 Wide part Ar1 Tip side Ar2 Base end side Ar3 First direction Ar4 Second direction Ax Central axis C electric cable TU tube

Claims (20)

  1. 　先端から基端に向けて延在することによって長手軸方向を規定する筒状のシースと、
    　前記シースの先端に対して取り付けられる筒状のキャップと、
    　前記キャップの先端から突出し、生体組織を処置するエンドエフェクタと、
    　前記シースと前記キャップとの境界を跨いで前記シースの外周面と前記キャップの外周面とをそれぞれ覆う位置に設けられ、前記長手軸方向に直交する径方向に収縮するチューブと、を備える処置具。     A cylindrical sheath that defines the longitudinal direction by extending from the tip to the base,
    A cylindrical cap attached to the tip of the sheath,
    An end effector that protrudes from the tip of the cap and treats living tissue,
    A treatment tool provided with a tube provided at a position straddling the boundary between the sheath and the cap and covering the outer peripheral surface of the sheath and the outer peripheral surface of the cap, respectively, and contracting in the radial direction orthogonal to the longitudinal axis direction. ..
  2. 　前記シース及び前記キャップには、
    　前記径方向に互いに重なるオーバーラップ領域が設けられ、
    　前記チューブは、
    　前記オーバーラップ領域を覆う請求項１に記載の処置具。     The sheath and the cap have
    Overlapping regions that overlap each other in the radial direction are provided.
    The tube is
    The treatment tool according to claim 1, which covers the overlapping area.
  3. 　前記キャップの外周面は、
    　前記オーバーラップ領域において、前記キャップの先端に向かうにしたがって、前記径方向の寸法が小さくなる縮径部を有し、
    　前記チューブは、
    　前記縮径部を覆う請求項２に記載の処置具。     The outer peripheral surface of the cap is
    In the overlap region, there is a reduced diameter portion in which the radial dimension becomes smaller toward the tip of the cap.
    The tube is
    The treatment tool according to claim 2, which covers the reduced diameter portion.
  4. 　前記キャップの外周面は、
    　前記キャップの先端と前記縮径部との間に、前記径方向の外側に向かって張り出した張出部を有し、
    　前記チューブの先端は、
    　前記張出部と前記縮径部との間に位置する請求項３に記載の処置具。     The outer peripheral surface of the cap is
    An overhanging portion extending outward in the radial direction is provided between the tip of the cap and the reduced diameter portion.
    The tip of the tube
    The treatment tool according to claim 3, which is located between the overhanging portion and the reduced diameter portion.
  5. 　前記張出部における前記径方向の寸法は、
    　前記チューブの先端の外周面における前記径方向の寸法以下である請求項４に記載の処置具。     The radial dimension of the overhang is
    The treatment tool according to claim 4, which is equal to or less than the radial dimension on the outer peripheral surface of the tip of the tube.
  6. 　前記張出部における前記径方向の寸法は、
    　前記チューブの先端の外周面における前記径方向の寸法以上である請求項４に記載の処置具。     The radial dimension of the overhang is
    The treatment tool according to claim 4, wherein the dimension is equal to or larger than the radial dimension on the outer peripheral surface of the tip of the tube.
  7. 　前記キャップは、
    　前記シースに対して着脱自在に取り付けられる請求項２に記載の処置具。     The cap is
    The treatment tool according to claim 2, which is detachably attached to the sheath.
  8. 　前記キャップは、
    　電気絶縁性の樹脂材料によって構成されている請求項１に記載の処置具。     The cap is
    The treatment tool according to claim 1, which is made of an electrically insulating resin material.
  9. 　前記キャップの外周面は、
    　前記張出部から前記キャップの先端に向かうにしたがって、前記径方向の寸法が小さくなる請求項４に記載の処置具。     The outer peripheral surface of the cap is
    The treatment tool according to claim 4, wherein the radial dimension becomes smaller toward the tip of the cap from the overhanging portion.
  10. 　前記キャップは、
    　前記エンドエフェクタとの干渉を防止するためのスリットを備える請求項１に記載の処置具。     The cap is
    The treatment tool according to claim 1, further comprising a slit for preventing interference with the end effector.
  11. 　前記シース及び前記キャップ内に挿通され、超音波振動を前記長手軸方向に沿って伝達する振動伝達部材をさらに備え、
    　前記エンドエフェクタは、
    　前記振動伝達部材の先端に設けられている請求項１に記載の処置具。     Further provided with a vibration transmission member inserted into the sheath and the cap to transmit ultrasonic vibrations along the longitudinal axis direction.
    The end effector is
    The treatment tool according to claim 1, which is provided at the tip of the vibration transmission member.
  12. 　生体組織を処置するエンドエフェクタを備えた処置具に用いられる筒状のキャップであって、
    　先端から基端に向けて延在することによって長手軸方向を規定する筒状のシースの先端に対して係合する係合部を備え、
    　前記キャップの外周面は、
    　前記係合部から前記キャップの先端に向かうにしたがって、前記長手軸方向に直交する径方向の寸法が小さくなる縮径部を有し、
    　前記係合部の外面及び前記縮径部は、
    　前記シースと前記キャップとの境界を跨ぐ位置に設けられ、前記径方向に収縮するチューブによって前記シースの外周面とともに覆われるキャップ。     A tubular cap used in a treatment tool equipped with an end effector that treats living tissue.
    It is provided with an engaging portion that engages with the tip of a tubular sheath that defines the longitudinal axis direction by extending from the tip to the base.
    The outer peripheral surface of the cap is
    It has a reduced diameter portion whose radial dimension orthogonal to the longitudinal axis direction becomes smaller toward the tip of the cap from the engaging portion.
    The outer surface of the engaging portion and the reduced diameter portion
    A cap provided at a position straddling the boundary between the sheath and the cap, and covered with the outer peripheral surface of the sheath by a tube that contracts in the radial direction.
  13. 　前記係合部は、
    　前記シースに対して前記径方向に重なる領域である請求項１２に記載のキャップ。     The engaging portion is
    The cap according to claim 12, which is a region that overlaps the sheath in the radial direction.
  14. 　前記キャップの外周面は、
    　前記キャップの先端と前記縮径部との間に、前記径方向の外側に向かって張り出した張出部を有し、
    　前記チューブの先端は、
    　前記張出部と前記縮径部との間に位置する請求項１３に記載のキャップ。     The outer peripheral surface of the cap is
    An overhanging portion extending outward in the radial direction is provided between the tip of the cap and the reduced diameter portion.
    The tip of the tube
    The cap according to claim 13, which is located between the overhanging portion and the reduced diameter portion.
  15. 　前記張出部における前記径方向の寸法は、
    　前記チューブの先端の外周面における前記径方向の寸法以下である請求項１４に記載のキャップ。     The radial dimension of the overhang is
    The cap according to claim 14, which is equal to or less than the radial dimension on the outer peripheral surface of the tip of the tube.
  16. 　前記張出部における前記径方向の寸法は、
    　前記チューブの先端の外周面における前記径方向の寸法以上である請求項１４に記載のキャップ。     The radial dimension of the overhang is
    The cap according to claim 14, which is equal to or larger than the radial dimension on the outer peripheral surface of the tip of the tube.
  17. 　電気絶縁性を有する樹脂材料によって構成されている請求項１２に記載のキャップ。 The cap according to claim 12, which is made of a resin material having electrical insulation.
  18. 　前記キャップの外周面は、
    　前記張出面から前記キャップの先端に向かうにしたがって、前記径方向の寸法が小さくなる請求項１４に記載のキャップ。     The outer peripheral surface of the cap is
    The cap according to claim 14, wherein the radial dimension becomes smaller toward the tip of the cap from the overhanging surface.
  19. 　前記エンドエフェクタとの干渉を防止するためのスリットをさらに備える請求項１２に記載のキャップ。 The cap according to claim 12, further comprising a slit for preventing interference with the end effector.
  20. 　先端から基端に向けて延在することによって長手軸方向を規定する筒状のシース内に、生体組織を処置するエンドエフェクタが先端に設けられた軸部材を挿通する工程と、
    　前記シースの先端に対して筒状のキャップを取り付ける工程と、
    　前記シースと前記キャップとの境界を跨いで前記シースの外周面と前記キャップの外周面とをそれぞれ覆う位置にチューブを配置する工程と、
    　前記チューブを前記長手軸方向に直交する径方向に収縮させる工程と、を備える処置具の製造方法。     A process of inserting a shaft member provided at the tip with an end effector for treating living tissue into a cylindrical sheath that extends from the tip to the base to define the longitudinal axis direction.
    The process of attaching a tubular cap to the tip of the sheath,
    A step of arranging a tube at a position that straddles the boundary between the sheath and the cap and covers the outer peripheral surface of the sheath and the outer peripheral surface of the cap, respectively.
    A method for manufacturing a treatment tool comprising a step of contracting the tube in a radial direction orthogonal to the longitudinal axis direction.
PCT/JP2020/019691 2020-05-18 2020-05-18 Treatment tool, cap and method for producing treatment tool WO2021234793A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002209903A (en) * 2001-01-24 2002-07-30 Olympus Optical Co Ltd Ultrasonic treatment apparatus
JP2012070793A (en) * 2010-09-27 2012-04-12 Fujifilm Corp Treatment instrument for endoscope
WO2016203978A1 (en) * 2015-06-18 2016-12-22 オリンパス株式会社 High-frequency treatment tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002209903A (en) * 2001-01-24 2002-07-30 Olympus Optical Co Ltd Ultrasonic treatment apparatus
JP2012070793A (en) * 2010-09-27 2012-04-12 Fujifilm Corp Treatment instrument for endoscope
WO2016203978A1 (en) * 2015-06-18 2016-12-22 オリンパス株式会社 High-frequency treatment tool

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