Ultrasonic treatment implement

Abstract

To reduce costs and ensure air tightness and water tightness.SOLUTION: An ultrasonic treatment implement comprises: a vibration transmission member 12 which transmits ultrasonic vibration from a base end to a tip; a tube TI into which the vibration transmission member 12 is inserted; a hard member 18 which is composed of a resin material harder than the tube TI, is provided at a nodal position P3 of the ultrasonic vibration and on the outer peripheral surface of the vibration transmission member 12, and comes into contact with the inner peripheral surface of the tube TI; and a pipe PI covering the outer peripheral surface of the tube TI. The thickness dimension of a part of the tube TI which is compressed between the pipe PI and the hard member 18 is smaller than the thickness dimension of other parts.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an ultrasonic treatment device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, ultrasonic treatment devices are known that apply ultrasonic energy as treatment energy to a site in living tissue that is to be treated (hereinafter, referred to as a treatment target) to treat the treatment target (see, for example, Patent Document 1).

[0003] The ultrasonic treatment device described in Patent Document 1 includes a vibration transmission member (probe), a jaw, a rubber lining (sealing portion), and a pipe (sheath) as described below. The vibration transmission member transmits ultrasonic vibrations from the base end to the tip end. The jaws open and close relative to the vibration transmitting member. The rubber lining has an annular shape and is provided on the outer circumferential surface of the vibration transmitting member, more specifically, the rubber lining is provided at a node position of the ultrasonic vibration. The vibration transmission member is inserted into the pipe, and the outer circumferential surface of the rubber lining is pressed against the inner circumferential surface of the pipe via the tube. The outer circumferential surface of the rubber lining is pressed against the inner circumferential surface of the pipe, thereby ensuring airtightness and watertightness. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2016 / 080303 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the rubber lining is molded on the outer peripheral surface of the vibration transmission member, burrs are generated. The burrs must be removed manually. This increases the processing cost due to the manual work, making it difficult to reduce the cost of the ultrasonic treatment device.

[0006] The present invention has been made in view of the above, and an object of the present invention is to provide an ultrasonic treatment device that can ensure airtightness and watertightness while achieving cost reduction. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, the ultrasonic treatment instrument of the present invention comprises a vibration transmission member that transmits ultrasonic vibrations from a base end to a tip end, a tube into which the vibration transmission member is inserted, a hard member that is made of a resin material harder than the tube and is provided at a node position of the ultrasonic vibration and on the outer peripheral surface of the vibration transmission member and abuts the inner peripheral surface of the tube, and a pipe that covers the outer peripheral surface of the tube, wherein the thickness dimension of the tube at the point compressed between the pipe and the hard member is smaller than the thickness dimension of other points.

[0008] In addition, the ultrasonic treatment instrument of the present invention includes a vibration transmission member that transmits ultrasonic vibrations from a base end to a tip end, a jaw that opens and closes with respect to the vibration transmission member, a hard member provided on the outer peripheral surface of the vibration transmission member, a tube into which the vibration transmission member is inserted and whose inner peripheral surface the hard member abuts, and a pipe covering the outer peripheral surface of the tube, wherein the hard member is made of a resin material that is harder than the tube and is provided at the most base nodal position among the nodal positions of the ultrasonic vibration, and a portion of the tube is expanded by the hard member and abuts against the inner peripheral surface of the pipe at a position spaced from the hard member in the longitudinal direction of the vibration transmission member. Effect of the Invention

[0009] According to the ultrasonic treatment device of the present invention, it is possible to ensure airtightness and watertightness while reducing costs. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing a treatment system according to an embodiment. [Diagram 2] FIG. 2 is a diagram for explaining the configuration of the tip portion of the ultrasonic treatment instrument. [Diagram 3] FIG. 3 is a diagram showing a configuration of the support member. [Figure 4] FIG. 4 is a diagram showing a change in shape of the inner tube caused by the third support member. [Diagram 5] FIG. 5 is a diagram illustrating a first modified example of the embodiment. [Figure 6] FIG. 6 is a diagram illustrating a second modification of the embodiment. [Figure 7] FIG. 7 is a diagram illustrating a third modification of the embodiment. [Figure 8] FIG. 8 is a diagram illustrating a fourth modified example of the embodiment. [Figure 9] FIG. 9 is a diagram illustrating a fifth modified example of the embodiment. [Figure 10] FIG. 10 is a diagram illustrating a sixth modified example of the embodiment. [Figure 11] FIG. 11 is a diagram illustrating a seventh modification of the embodiment. [Figure 12] FIG. 12 is a diagram illustrating an eighth modification of the embodiment. [Figure 13] FIG. 13 is a diagram illustrating an eighth modification of the embodiment. [Figure 14] FIG. 14 is a diagram illustrating a ninth modification of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a mode for carrying out the present invention (hereinafter, referred to as an embodiment) will be described with reference to the drawings. Note that the present invention is not limited to the embodiment described below. Furthermore, in the description of the drawings, the same parts are given the same reference numerals.

[0012] [Overall configuration of treatment system] FIG. 1 is a diagram showing a treatment system 1 according to an embodiment. The treatment system 1 applies treatment energy to a region of a biological tissue to be treated (hereinafter, referred to as a treatment target) to treat the treatment target. The treatment energy in this embodiment is ultrasonic energy and high-frequency energy. Treatments that can be performed by the treatment system 1 according to this embodiment include coagulation (sealing) of the treatment target, incision of the treatment target, and the like. Coagulation and incision may be performed simultaneously. As shown in FIG. 1, the treatment system 1 includes an ultrasonic treatment tool 2 and a control device 3.

[0013] [Configuration of ultrasonic treatment device] In the following, one side along the central axis Ax1 (FIG. 1) of the outer pipe 10 will be referred to as the tip side Ar1, and the other side will be referred to as the base side Ar2. In addition, the "width direction" described below means a direction perpendicular to the central axis Ax1 and the opening / closing direction of the jaw 11 relative to the treatment portion 121, and perpendicular to the paper plane of FIGS. 1 and 2.

[0014] Fig. 2 is a diagram for explaining the configuration of the tip portion of the ultrasonic treatment instrument 2. Specifically, Fig. 2 is a cross-sectional view of the tip portion of the ultrasonic treatment instrument 2 cut along a plane including the central axis Ax1 of the outer pipe 10, with the jaw 11 and the vibration transmission member 12 included in the plane.

[0015] The ultrasonic treatment device 2 is a treatment device that applies ultrasonic energy and high-frequency energy to a treatment target to treat the treatment target. As shown in FIG. 1, the ultrasonic treatment device 2 includes a handpiece 4 and an ultrasonic transducer 5.

[0016] As shown in Figures 1 and 2, the handpiece 4 includes a fixed handle 6 (Figure 1), an operating handle 7 (Figure 1), a switch 8 (Figure 1), a rotating knob 9 (Figure 1), an outer pipe 10, a jaw 11, and a vibration transmission member 12.

[0017] The fixed handle 6 supports the entire ultrasonic treatment instrument 2 and is a part that is held by an operator (user) such as a surgeon.

[0018] The operating handle 7 is attached movably to the fixed handle 6, and receives opening and closing operations by an operator such as a surgeon.

[0019] The switch 8 is provided in an exposed state on the outside of the fixed handle 6, and receives a treatment operation by an operator such as a surgeon.

[0020] The rotating knob 9 has a generally cylindrical shape coaxial with the central axis Ax1, and is provided on the tip side Ar1 of the fixed handle 6. The rotating knob 9 is rotated by an operator such as a surgeon. The rotating knob 9 rotates about the central axis Ax1 relative to the fixed handle 6 through the rotating operation. The rotation of the rotating knob 9 also rotates the outer pipe 10, the jaw 11, and the vibration transmission member 12 about the central axis Ax1.

[0021] The outer pipe 10 has a tubular shape. In this embodiment, the outer pipe 10 is a cylindrical pipe made of a conductive material such as a metal.

[0022] In this outer pipe 10, a pivot axis Pi1 (FIGS. 1 and 2) is fixed to the end of the tip side Ar1. The pivot axis Pi1 (FIGS. 1 and 2) is formed of a cylindrical pin extending in a direction perpendicular to the paper surface of FIGS. 1 and 2, and engages with the jaw 11 and supports the jaw 11 so that the jaw 11 can rotate.

[0023] The outer circumferential surface of the outer pipe 10 is covered with an electrically insulating outer tube TO (FIG. 2). A tubular inner pipe PI (FIG. 2) that moves forward and backward along the longitudinal direction of the outer pipe 10 in response to an opening and closing operation of the operating handle 7 by an operator such as a surgeon is inserted inside the outer pipe 10. This inner pipe PI corresponds to the pipe according to the present invention. A drive shaft Pi2 (FIG. 2) that is formed of a cylindrical pin extending in a direction perpendicular to the paper plane of FIGS. 1 and 2 and engages with the jaw 11 is fixed to the end of the tip side Ar1 of the inner pipe PI. In this embodiment, the drive shaft Pi2 is arranged on the upper side in FIG. 2 (the side where the arm body 131 is arranged with respect to the treatment section 121) with respect to the rotation shaft Pi1.

[0024] In this embodiment, a part of the jaw 11 is made of a conductive material. As shown in FIG.

[0025] In this embodiment, the arm 13 is made of a conductive material and is a member in which an arm body 131 and a pair of bearing portions 132 are integrally formed, as shown in FIG.

[0026] The arm body 131 is configured of a long plate body, and is disposed in a position where one plate surface faces the vibration transmission member 12 .

[0027] The pair of bearing portions 132 are provided at the ends of the base end side Ar2 of the arm body 131, and are each composed of a plate body facing each other in the width direction of the arm body 131. Note that only one of the pair of bearing portions 132 is shown in Fig. 2. Since the pair of bearing portions 132 have the same configuration, the configuration of only one of the bearing portions 132 will be described below.

[0028] The bearing portion 132 is connected to the outer pipe 10 by a rotation axis Pi1, and is connected to the inner pipe PI by a drive axis Pi2.

[0029] The arm 13 rotates about the rotation axis Pi1 relative to the outer pipe 10 in conjunction with the forward / backward movement of the inner pipe PI in response to an opening / closing operation on the operation handle 7 by an operator such as a surgeon. As a result, the jaw 11 opens and closes with respect to the treatment section 121, which is the end of the distal end side of the vibration transmission member 12, and can grasp a treatment target between the jaw 11 and the treatment section 121. In this embodiment, the jaw 11 rotates about the rotation axis Pi1 in a direction approaching the treatment section 121 in conjunction with the movement of the inner pipe PI toward the distal end side Ar1. That is, the jaw 11 closes with respect to the treatment section 121. Also, the jaw 11 rotates about the rotation axis Pi1 in a direction away from the treatment section 121 in conjunction with the movement of the inner pipe PI toward the proximal end side Ar2. That is, the jaw 11 opens with respect to the treatment section 121. As described above, in this embodiment, the ultrasonic treatment tool 2 is configured as a so-called push-close type.

[0030] The pad 14 is made of an electrically insulating and biocompatible resin material, such as polytetrafluoroethylene (PTFE), and has a generally rectangular parallelepiped shape extending along the longitudinal direction of the arm 13. As shown in FIG. 2, the pad 14 is fixed to the surface of the arm body 131 on the treatment section 121 side, and contacts the treatment section 121 when the jaw 11 is closed relative to the treatment section 121. The pad 14 has electrical insulation, and therefore has a function of preventing a short circuit between the arm 13 and the vibration transmission member 12. The pad 14 also has a function of preventing the ultrasonically vibrating treatment section 121 from colliding with the arm 13 and being damaged when the incision of the treatment target by ultrasonic vibration is completed.

[0031] Examples of methods for fixing the pad 14 to the arm body 131 include a fixing method in which a claw portion is protruded from the surface of the arm body 131 facing the treatment section 121 and the pad 14 is engaged with the claw portion to mechanically fix the pad 14, or insert molding.

[0032] The vibration transmission member 12 is made of a conductive material and has an elongated shape extending along the central axis Ax1. As shown in FIG. 2, the vibration transmission member 12 is inserted into the inner pipe PI with the treatment portion 121 protruding to the outside. At this time, the end of the base end side Ar2 of the vibration transmission member 12 is mechanically connected to the ultrasonic vibrator 52 constituting the ultrasonic transducer 5 as shown in FIG. 1. The vibration transmission member 12 transmits ultrasonic vibration generated by the ultrasonic transducer 5 from the end of the base end side Ar2 to the treatment portion 121. In this embodiment, the ultrasonic vibration is a longitudinal vibration vibrating in a direction along the central axis Ax1. In addition, the outer peripheral surface of the vibration transmission member 12 except for the treatment portion 121 is covered by an electrically insulating inner tube TI (FIG. 2). As the inner tube TI, a heat-shrinkable tube made of a fluororesin such as perfluoroethylene propene copolymer (FEP) can be adopted. This inner tube TI corresponds to the tube according to the present invention.

[0033] A support member 15 (see FIG. 3) is provided on the outer circumferential surface of the vibration transmission member 12 described above. The detailed configuration of the support member 15 will be described later in the section "Configuration of the Support Member."

[0034] As shown in FIG. 1, the ultrasonic transducer 5 includes a TD (transducer) case 51 and an ultrasonic vibrator 52.

[0035] The TD case 51 supports the ultrasonic transducer 52 and is detachably connected to the fixed handle 6 .

[0036] The ultrasonic transducer 52 generates ultrasonic vibrations under the control of the control device 3. In this embodiment, the ultrasonic transducer 52 is configured by a BLT (bolt-tightened Langevin type transducer).

[0037] [Configuration of the control device] The control device 3 comprehensively controls the operation of the ultrasonic treatment device 2 via an electric cable C (FIG. 1). Specifically, the control device 3 detects a treatment operation on the switch 8 by an operator such as a surgeon through the electric cable C. Then, when the control device 3 detects the treatment operation, it applies treatment energy to the treatment target grasped between the jaw 11 and the treatment section 121 through the electric cable C. That is, the control device 3 treats the treatment target.

[0038] For example, when ultrasonic energy is applied to a treatment target, the control device 3 supplies driving power to the ultrasonic transducer 52 via the electric cable C. This causes the ultrasonic transducer 52 to generate longitudinal vibration (ultrasonic vibration) that vibrates in a direction along the central axis Ax1. The treatment section 121 also vibrates at a desired amplitude due to the longitudinal vibration. Then, ultrasonic vibration is applied from the treatment section 121 to the treatment target held between the jaw 11 and the treatment section 121. In other words, ultrasonic energy is applied from the treatment section 121 to the treatment target.

[0039] Furthermore, for example, when applying high-frequency energy to a treatment target, the control device 3 supplies high-frequency power between the arm 13 and the vibration transmission member 12 via the electric cable C, the outer pipe 10, etc. Then, when high-frequency power is supplied between the arm 13 and the vibration transmission member 12, a high-frequency current flows through the treatment target held between the jaw 11 and the treatment section 121. In other words, high-frequency energy is applied to the treatment target. That is, the arm 13 and the treatment section 121 function as electrodes according to the present invention.

[0040] [Configuration of Support Member] Next, the configuration of the above-mentioned support member 15 will be described. Fig. 3 is a diagram showing the configuration of the support member 15. Specifically, Fig. 3 is a cross-sectional view of the jaw 11, the vibration transmission member 12, the inner pipe PI, the inner tube TI, and the support member 15 cut along the same plane as in Fig. 2. As shown in FIG. 3, the support member 15 includes first to third support members 16 to .

[0041] In this embodiment, the first and second support members 16, 17 are each made of an elastic rubber member and have an annular shape into which the vibration transmission member 12 is inserted. More specifically, the first and second support members 16, 17 are disposed at a node position P1 (FIG. 3) on the most distal end side Ar1 and a node position P2 (FIG. 3) second from the distal end side Ar1 among the node positions of the ultrasonic vibration (longitudinal vibration). The first and second support members 16, 17 contact the inner peripheral surface of the inner tube TI.

[0042] The third support member 18 is made of a resin material harder than the inner tube TI and has a circular ring shape into which the vibration transmission member 12 is inserted. Examples of the resin material include polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), polyphenylsulfone (PPSU), and polyoxymethylene (POM). More specifically, the third support member 18 is disposed at a node position P3 (FIG. 3) on the most proximal side Ar2 among the node positions in the ultrasonic vibration (longitudinal vibration). This third support member 18 corresponds to a hard member according to the present invention.

[0043] Here, at each of the nodal positions P1 to P3 on the outer circumferential surface of the vibration transfer member 12, there are provided annular grooves 122 to 124 in which the first to third support members 16 to 18 are attached, as shown in FIG.

[0044] [Shape change of the inner tube by the third support member] Next, a change in shape of the inner tube TI caused by the above-mentioned third support member 18 will be described. Fig. 4 is a diagram showing a change in shape of the inner tube TI due to the third support member 18. Specifically, Fig. 4(a) is an enlarged view of a portion of Fig. 3. Also, Fig. 4(b) is an enlarged view of a region including a portion TIP of the inner tube TI in Fig. 4(a).

[0045] As shown in FIG. 4(a), the third support member 18 is a circular member having a rectangular cross section. The inner diameter of the third support member 18 is approximately the same as the outer diameter of the groove 124. In order to prevent a gap from being formed between the third support member 18 and the vibration transmission member 12, it is preferable that the inner diameter of the third support member 18 is smaller than the outer diameter of the groove 124. The outer diameter of the third support member 18 is larger than the inner diameter of the inner tube TI before assembly. Therefore, the inner tube TI is expanded by the third support member 18 in the assembled state, as shown in FIG. 4(a). The difference between the inner diameter of the inner pipe PI and the outer diameter of the third support member 18 is smaller than twice the thickness of the inner tube TI before assembly. Therefore, a part TIP of the inner tube TI (FIG. 4) is compressed between the inner pipe PI and the third support member 18. The thickness dimension TH1 of the portion TIP is smaller than the thickness dimension TH2 of the other portion of the inner tube TI (FIG. 4(b)).

[0046] According to the present embodiment described above, the following effects are achieved. In the ultrasonic treatment tool 2 according to the present embodiment, the third support member 18 is made of a resin material harder than the inner tube TI, and compresses the part TIP of the inner tube TI between the third support member 18 and the inner pipe PI as described above. Therefore, at the part TIP, it is possible to prevent the gas or liquid that has entered the inner pipe PI from the tip end of the inner pipe PI from proceeding to the base end side Ar2. In addition, compared to the conventional configuration using a rubber lining, it is possible to omit the work of removing burrs, and to reduce processing costs. Therefore, according to the ultrasonic treatment device 2 according to the present embodiment, it is possible to ensure airtightness and watertightness while reducing costs.

[0047] (Other embodiments) Although the embodiments for carrying out the present invention have been described above, the present invention should not be limited to the above-described embodiments. In the above-described embodiment, ultrasonic energy and high-frequency energy are adopted as the treatment energy applied to the treatment target by the ultrasonic treatment device 2, but the present invention is not limited to this, and only ultrasonic energy may be applied.

[0048] In the above-described embodiment, the ultrasonic treatment tool 2 is configured as a so-called push-close type, but the present invention is not limited thereto, and may be configured as a so-called pull-close type. Specifically, the jaw 11 rotates about the rotation axis Pi1 in a direction approaching the treatment section 121 in conjunction with the movement of the inner pipe PI toward the base end side Ar2. That is, the jaw 11 closes with respect to the treatment section 121. Also, the jaw 11 rotates about the rotation axis Pi1 in a direction away from the treatment section 121 in conjunction with the movement of the inner pipe PI toward the tip end side Ar1. That is, the jaw 11 opens with respect to the treatment section 121.

[0049] In the above-described embodiment, the jaw 11 opens and closes with respect to the treatment portion 121 in conjunction with the forward and backward movement of the inner pipe PI along the central axis Ax1, but this is not limited thereto. A configuration in which the jaw 11 opens and closes with respect to the treatment portion 121 in conjunction with the forward and backward movement of the outer pipe 10 along the central axis Ax1 may be adopted.

[0050] In the above-described embodiment, the first and second support members 16, 17 may be made of a resin material, similar to the third support member 18. When the first and second support members 16, 17 are made of a resin material in this way, the deformation amount of the first and second support members 16, 17 can be reduced and the deflection of the vibration transmission member 12 can be suppressed when the jaw 11 is closed, compared to when they are made of a rubber lining. In other words, the treatment target can be reliably grasped between the jaw 11 and the vibration transmission member 12.

[0051] In the above-described embodiment, the following modified examples 1 to 4 may be adopted.

[0052] (Variation 1) Fig. 5 is a diagram for explaining a first modified example of the embodiment. Specifically, Fig. 5(a) is a diagram corresponding to Fig. 4(a). Fig. 5(b) is an enlarged view of a region including a part TIP of the inner tube TI in Fig. 5(a). In the above-described embodiment, instead of the third support member 18, a third support member 18A according to the present modified example 1 shown in FIG.

[0053] The third support member 18A has a different outer shape from the third support member 18 described in the above embodiment. Specifically, the third support member 18A is composed of a large diameter portion 181 and a small diameter portion 182, as shown in (a) of FIG.

[0054] The large diameter portion 181 has a circular ring shape.

[0055] The small diameter portion 182 has an annular shape and is provided integrally with the tip side Ar1 of the large diameter portion 181 in a state where it is coaxial with the large diameter portion 181. The outer diameter dimension of the small diameter portion 182 is smaller than the outer diameter dimension of the large diameter portion 181, as shown in FIG.

[0056] As shown in FIG. 5(a), the inner tube TI is assembled with the small diameter portion 182 inserted therein and the end of the base end side Ar2 abutting against the stepped portion 180 between the large diameter portion 181 and the small diameter portion 182. Here, the outside diameter dimension of the small diameter portion 182 is larger than the inside diameter dimension of the inner tube TI before assembly. Therefore, the inner tube TI is expanded by the small diameter portion 182 in the assembled state. Also, the difference between the inside diameter dimension of the inner pipe PI and the outside diameter dimension of the small diameter portion 182 is smaller than twice the thickness dimension of the inner tube TI before assembly. Therefore, a portion TIP of the inner tube TI (FIG. 5) is compressed between the inner pipe PI and the small diameter portion 182. And the thickness dimension TH1 of the portion TIP is smaller than the thickness dimension TH2 of the other portion of the inner tube TI (FIG. 5(b)).

[0057] According to the above-described first modification, in addition to the same effects as those of the above-described embodiment, the following effects are achieved. In the third support member 18A according to the present modified example 1, the stepped portion 180 can function as a positioning surface in the direction along the central axis Ax1 of the inner tube TI. Therefore, the assemblability of the ultrasonic treatment instrument 2 can be improved.

[0058] (Variation 2) Fig. 6 is a diagram for explaining a second modified example of the embodiment. Specifically, Fig. 6(a) is a diagram corresponding to Fig. 4(a). Fig. 6(b) is an enlarged view of a region including a part TIP of an inner tube TI in Fig. 6(a). In the above-described embodiment, instead of the third support member 18, a third support member 18B according to the present modified example 2 shown in FIG.

[0059] The third support member 18B has a different outer shape from the third support member 18 described in the above embodiment. Specifically, the third support member 18B is composed of a support member main body 183 and a truncated cone portion 184, as shown in FIG.

[0060] The support member body 183 has a circular ring shape.

[0061] The truncated cone portion 184 has an outer shape like a truncated cone, an outer diameter dimension of which decreases toward the tip side Ar1, and is provided integrally with the tip side Ar1 of the support member main body 183 in a state of being coaxial with the support member main body 183. The maximum outer diameter dimension of the truncated cone portion 184 is the same as the outer diameter dimension of the support member main body 183, as shown in Fig. 6. That is, the truncated cone portion 184 corresponds to the tapered portion according to the present invention.

[0062] Then, as shown in FIG. 6(a), the inner tube TI is assembled with the third support member 18B inserted therein. Here, the outer diameters of the truncated cone portion 184 and the support member main body 183 are larger than the inner diameter of the inner tube TI before assembly. Therefore, the inner tube TI is expanded by the third support member 18B in the assembled state. Also, the difference between the inner diameter of the inner pipe PI and the outer diameter of the support member main body 183 is smaller than twice the thickness of the inner tube TI before assembly. Therefore, a portion TIP of the inner tube TI (FIG. 6) is compressed between the inner pipe PI and the support member main body 183. And the thickness dimension TH1 of the portion TIP is smaller than the thickness dimension TH2 of the other portion of the inner tube TI (FIG. 6(b)).

[0063] According to the present modified example 2 described above, in addition to the same effects as those of the above-mentioned embodiment, the following effects are achieved. In the third support member 18B according to the present modified example 2, the outer circumferential surface of the truncated cone portion 184 has a tapered shape. This allows the third support member 18B to be easily inserted into the inner tube TI, improving the ease of assembly of the ultrasonic treatment instrument 2. In addition, the adhesion between the inner circumferential surface of the inner tube TI and the outer circumferential surface of the third support member 18B is improved, and airtightness and watertightness can be sufficiently ensured.

[0064] (Variation 3) Fig. 7 is a diagram for explaining a third modified example of the embodiment. Specifically, Fig. 7(a) is a diagram corresponding to Fig. 4(a). Fig. 7(b) is an enlarged view of a region including a part TIP of an inner tube TI in Fig. 7(a). In the above-described embodiment, instead of the third support member 18, a third support member 18C according to the present modified example 3 shown in FIG.

[0065] The third support member 18C has a different outer shape from the third support member 18 described in the above embodiment. Specifically, the third support member 18C is composed of a support member main body 185 and first and second truncated cone portions 186 and 187, as shown in FIG.

[0066] The support member body 185 has a circular ring shape.

[0067] The first truncated cone portion 186 has a truncated cone-like outer shape, an outer diameter dimension of which decreases toward the tip side Ar1, and is provided integrally with the tip side Ar1 of the support member main body 185 in a state of being coaxial with the support member main body 185. The largest outer diameter dimension of this first truncated cone portion 186 is the same as the outer diameter dimension of the support member main body 185, as shown in Fig. 7. That is, the first truncated cone portion 186 corresponds to the tapered portion according to the present invention.

[0068] The second truncated cone portion 187 has a truncated cone-like outer shape, an outer diameter dimension of which decreases toward the base end side Ar2, and is provided integrally with the base end side Ar2 of the support member main body 185 in a state of being coaxial with the support member main body 185. The largest outer diameter dimension of this second truncated cone portion 187 is the same as the outer diameter dimension of the support member main body 185, as shown in Fig. 7. That is, the second truncated cone portion 187 corresponds to the tapered portion according to the present invention.

[0069] Then, as shown in FIG. 7(a), the inner tube TI is assembled with the third support member 18C inserted therein. Here, the outer diameters of the first and second truncated cone portions 186, 187 and the support member main body 185 are larger than the inner diameter of the inner tube TI before assembly. Therefore, the inner tube TI is expanded by the third support member 18C in the assembled state. Also, the difference between the inner diameter of the inner pipe PI and the outer diameter of the support member main body 185 is smaller than twice the thickness of the inner tube TI before assembly. Therefore, a portion TIP of the inner tube TI (FIG. 7) is compressed between the inner pipe PI and the support member main body 185. And the thickness dimension TH1 of the portion TIP is smaller than the thickness dimension TH2 of the other portion of the inner tube TI (FIG. 7(b)).

[0070] According to the above-described third modification, in addition to the same effects as those of the above-described embodiment and second modification, the following effects are achieved. In the present modified example 3, the length dimension of the part TIP of the inner tube TI in the direction along the central axis Ax1 can be shortened. Therefore, it is possible to reduce the sliding resistance when the inner pipe PI is moved forward and backward in the direction along the central axis Ax1 to open and close the jaw 11 with respect to the treatment portion 121.

[0071] (Variation 4) Fig. 8 is a diagram for explaining a fourth modified example of the embodiment. Specifically, Fig. 8(a) is a diagram corresponding to Fig. 4(a). Fig. 8(b) is an enlarged view of a region including a part TIP of the inner tube TI in Fig. 8(a). In the above-described embodiment, instead of the third support member 18, a third support member 18D according to the present modified example 4 shown in FIG.

[0072] The third support member 18D has a different outer shape from the third support member 18 described in the above embodiment. Specifically, as shown in Fig. 8, the outer diameter dimension of the third support member 18D becomes smaller toward the tip side Ar1. That is, the third support member 18D corresponds to a tapered portion according to the present invention.

[0073] Then, as shown in FIG. 8(a), the inner tube TI is assembled with the third support member 18D inserted therein. Here, the outer diameter dimension of the third support member 18D is larger than the inner diameter dimension of the inner tube TI before assembly. Therefore, the inner tube TI is expanded by the third support member 18D in the assembled state. Also, the difference between the inner diameter dimension of the inner pipe PI and the outer diameter dimension of the end of the base end side Ar2 of the third support member 18D is smaller than twice the thickness dimension of the inner tube TI before assembly. Therefore, a portion TIP of the inner tube TI (FIG. 8) is compressed between the inner pipe PI and the end of the base end side Ar2 of the third support member 18D. And the thickness dimension TH1 of the portion TIP is smaller than the thickness dimension TH2 of the other portion of the inner tube TI (FIG. 8(b)).

[0074] Even when the configuration of the third support member 18D according to the fourth modification described above is adopted, the same effects as those of the above-mentioned embodiment and the third modification can be achieved.

[0075] (Variation 5) Fig. 9 is a diagram for explaining a fifth modified example of the embodiment. Specifically, Fig. 9(a) is a diagram corresponding to Fig. 4(a). Fig. 9(b) is an enlarged view of a region including a part TIP of the inner tube TI in Fig. 9(a). In the above-described embodiment, instead of the third support member 18, a third support member 18E according to the present modified example 5 shown in FIG.

[0076] The third support member 18E has a different outer shape from the third support member 18 described in the above embodiment. Specifically, as shown in Fig. 9, the outer diameter dimension of the third support member 18E becomes smaller toward the tip side Ar1. That is, the third support member 18E corresponds to a tapered portion according to the present invention.

[0077] Then, as shown in FIG. 9(a), the inner tube TI is assembled with the third support member 18E inserted therein. Here, the outer diameter dimension of the third support member 18E is larger than the inner diameter dimension of the inner tube TI before assembly. Therefore, the inner tube TI is expanded by the third support member 18E in the assembled state. Also, the difference between the inner diameter dimension of the inner pipe PI and the outer diameter dimension of the end of the base end side Ar2 of the third support member 18E is larger than twice the thickness dimension of the inner tube TI before assembly. Therefore, the inner tube TI is not compressed between the inner pipe PI and the end of the base end side Ar2 of the third support member 18E. Then, a part TIP of the inner tube TI abuts against the inner circumferential surface of the inner pipe PI at a position separated from the third support member 18E toward the base end side Ar2 (FIG. 9(b)).

[0078] According to the fifth modification described above, in addition to the same effects as those of the above-mentioned embodiment, the following effects are achieved. In the present modified example 5, the inner tube TI is not compressed between the inner pipe PI and the third support member 18E. The part TIP of the inner tube TI abuts against the inner circumferential surface of the inner pipe PI at a position spaced from the third support member 18E toward the base end side Ar2. Therefore, the part TIP of the inner tube TI can be abutted against the inner circumferential surface of the inner pipe PI with a pressure sufficient to ensure watertightness and airtightness. In addition, the sliding resistance when the inner pipe PI is moved forward and backward in the direction along the central axis Ax1 to open and close the jaw 11 relative to the treatment portion 121 can be reduced.

[0079] (Variation 6) Fig. 10 is a diagram for explaining a sixth modified example of the embodiment. Specifically, Fig. 10(a) is a diagram corresponding to Fig. 4(a). Fig. 10(b) is an enlarged view of a region including a part TIP of an inner tube TI in Fig. 10(a). In the above-described embodiment, instead of the third support member 18, a third support member 18F according to Modification 6 shown in Fig. 10 may be employed. In Modification 6, the inner tube TI is divided into two bodies in the direction along the central axis Ax1 as shown in Fig. 10(a). In the following, of the two bodies, the inner tube TI located on the tip side Ar1 will be referred to as the first inner tube TI1, and the inner tube TI located on the base side Ar2 will be referred to as the second inner tube TI2.

[0080] The third support member 18F has a different outer shape from the third support member 18 described in the above-described embodiment. Specifically, the third support member 18F is composed of a circular ring portion 188 and a truncated cone portion 189, as shown in FIG.

[0081] The annular portion 188 has an annular shape. The outer diameter of the annular portion 188 is substantially the same as the thickness of the first inner tube TI1 before assembly, as shown in Fig. 10(a).

[0082] The truncated cone portion 189 has an outer shape like a truncated cone, an outer diameter dimension of which decreases toward the base end side Ar2, and is provided integrally with the base end side Ar2 of the annular portion 188 in a state of being coaxial with the annular portion 188. The maximum outer diameter dimension of the truncated cone portion 189 is larger than the outer diameter dimension of the annular portion 188, as shown in Fig. 10. That is, the truncated cone portion 189 corresponds to the tapered portion according to the present invention.

[0083] Then, as shown in FIG. 10, the first inner tube TI1 is assembled in a state in which the annular portion 188 is inserted therein and the end portion of the base end side Ar2 is abutted against a stepped portion 190 between the annular portion 188 and the truncated cone portion 189.

[0084] On the other hand, the second inner tube TI2 is assembled with the truncated cone portion 189 inserted therein, as shown in FIG. 10. Here, the outer diameter of the truncated cone portion 189 is larger than the inner diameter of the second inner tube TI2 before assembly. Therefore, the second inner tube TI2 is expanded toward the tip side Ar1 by the truncated cone portion 189 in the assembled state. Also, the difference between the inner diameter of the inner pipe PI and the outer diameter of the end of the tip side Ar1 of the truncated cone portion 189 is larger than twice the thickness of the second inner tube TI2 before assembly. Therefore, the second inner tube TI2 is not compressed between the inner pipe PI and the end of the tip side Ar1 of the truncated cone portion 189. Then, a part TIP of the second inner tube TI2 abuts against the inner circumferential surface of the inner pipe PI at a position spaced from the truncated cone portion 189 toward the tip side Ar1 (FIG. 10(b)).

[0085] According to the sixth modification described above, in addition to the same effects as those of the embodiment and the fifth modification described above, the following effects are achieved. In this modification 6, the second inner tube TI2 is expanded toward the tip side Ar1 by the truncated cone portion 189. Also, a part TIP of the second inner tube TI2 abuts against the inner circumferential surface of the inner pipe PI at a position separated from the truncated cone portion 189 toward the tip side Ar1. For this reason, for example, in an operation using an insufflator, a procedure is performed in a state in which the abdominal cavity is pressurized. When high-pressure gas enters the inner pipe PI from the tip of the inner pipe PI in the abdominal cavity toward the base end side Ar2, the high-pressure gas presses the part TIP of the second inner tube TI2 against the inner circumferential surface of the inner pipe PI. For this reason, airtightness and watertightness can be effectively ensured.

[0086] (Variation 7) Fig. 11 is a diagram for explaining a seventh modified example of the embodiment. Specifically, Fig. 11(a) is a diagram corresponding to Fig. 4(a). Fig. 11(b) is an enlarged view of a region including a part TIP of an inner tube TI in Fig. 11(a). In the above-described embodiment, instead of the third support member 18, a third support member 18G according to the seventh modified example shown in FIG.

[0087] The third support member 18G has a different outer shape from the third support member 18 described in the above-described embodiment. Specifically, as shown in Fig. 11, the third support member 18G is recessed from the tip side Ar1 toward the base side Ar2 and is provided with a barb portion 191 that turns up the end of the base side Ar2 of the inner tube TI.

[0088] 11, the inner tube TI is assembled in a state in which the end portion of the base end side Ar2 is turned up by the barb portion 191. Then, in the inner tube TI, the turned up portion TIP comes into contact with the inner circumferential surface of the inner pipe PI at a position spaced from the third support member 18G to the tip end side Ar1 (FIG. 11(b)).

[0089] Even when the configuration of the third support member 18G according to the seventh modification described above is adopted, the same effects as those of the above-mentioned embodiment and the sixth modification can be achieved.

[0090] (Variation 8) Fig. 12 and Fig. 13 are diagrams for explaining Modification 8 of the embodiment. Specifically, Fig. 12 is an exploded perspective view showing a third support member 18H according to Modification 8. Fig. 13 is a diagram showing the order of assembling the third support member 18H to the vibration transmission member 12. In the above-described embodiment, the third support member 18 may have the configuration of a third support member 18H according to Modification 8 shown in FIGS.

[0091] The third support member 18H is constituted by first and second C-rings 192 and 193, as shown in FIGS.

[0092] The first and second C rings 192, 193 are each made of the same resin material as the third support member 18 described in the above embodiment, and have the same shape as each other. For this reason, only the configuration of the first C ring 192 will be described below, and for the second C ring 193, the same components as those of the first C ring 192 will be denoted by the same reference numerals and descriptions thereof will be omitted.

[0093] As shown in FIG. 12, the first C-ring 192 includes a C-ring body 1921 and a protrusion 1922 .

[0094] The C-ring main body 1921 is a C-shaped member having an inner diameter dimension substantially equal to the outer diameter dimension of the groove 124 and a notch portion 1923 formed in a portion of the circumferential direction of the circular ring member.

[0095] The protrusion 1922 is a part that protrudes along the central axis of the C-ring body 1921 from a position that is rotationally symmetrical by 180° about the central axis of the C-ring body 1921 with respect to the location where the cutout 1923 is provided.

[0096] The third support member 18H is then assembled into the groove 124 as follows. Specifically, first, the worker pushes apart both circumferential end portions (both edges of the notch portion 1923) of the C ring body 1921 of the first C ring 192 in a direction away from each other, and places the vibration transmission member 12 inside the C-shape of the C ring body 1921 (FIG. 13(b)). Similarly, the worker pushes apart both circumferential end portions (both edges of the notch portion 1923) of the C ring body 1921 of the second C ring 193 in a direction away from each other, and places the vibration transmission member 12 inside the C-shape of the C ring body 1921 in a state in which the protrusion portion 1922 of the second C ring 193 fits into the notch portion 1923 of the first C ring 192 (FIG. 13(c)). That is, the first and second C rings 192 and 193 are attached to the vibration transmission member 12 by so-called snap fit.

[0097] According to the eighth modification described above, in addition to the same effects as those of the above-mentioned embodiment, the following effects are achieved. The third support member 18H according to the eighth modified example is composed of the first and second C-rings 192 and 193 described above. Therefore, the first and second C-rings 192 and 193 can be attached to the vibration transmission member 12 by so-called snap-fitting, and the assemblability of the ultrasonic treatment device 2 can be improved. In addition, the assembly time can be reduced, and the cost of the ultrasonic treatment device 2 can be reduced. Furthermore, by forming the third support member 18H from a resin material, the gap at the boundary between the first and second C-rings 192 and 193 can be narrowed, and the path through which the liquid travels can be made long and complex, and watertightness can be sufficiently ensured. In particular, since a part of the boundary intersects (is perpendicular to) the direction along the central axis Ax1, the intrusion of the liquid can be effectively suppressed. In addition, by manufacturing the third support member 18H composed of a resin material by a 3D printer, the third support member 18H can be manufactured at low cost.

[0098] (Variation 9) FIG. 14 is a diagram illustrating a ninth modification of the embodiment. Specifically, FIG. 14 is a diagram illustrating the order in which the third support member 18I according to the ninth modification is attached to the vibration transmission member 12. In the above-described embodiment, the third support member 18 may have the configuration of a third support member 18I according to the present modified example 9 shown in FIG.

[0099] The third support member 18I is made of the same resin material as the third support member 18 described in the above embodiment. Specifically, as shown in Fig. 14(b), the third support member 18I has an inner diameter dimension that is substantially the same as the outer diameter dimension of the groove 124, and has an annular shape into which the vibration transmission member 12 is inserted. The third support member 18I is provided with a slit SL (Fig. 14(b)) extending from one end to the other end in the direction along the central axis Ax1.

[0100] The third support member 18I is then assembled into the groove 124 as described below. Specifically, the worker places the vibration transmission member 12 inside the third support member 18I while pushing apart both circumferential edge portions of the third support member 18I, the edges of which are bounded by the slit SL (FIG. 14(c)).

[0101] Even when the third support member 18I is configured from a single member as in the present modified example 9 described above, the same effects as those of the above-described embodiment and modified example 8 can be achieved. [Explanation of symbols]

[0102] 1 Treatment System 2. Ultrasonic treatment tools 3. Control device 4 Handpiece 5 Ultrasonic Transducers 6 Fixed Handle 7 Operating Handle 8. Switch 9 Rotating Knob 10 Outer pipe 11 Joe 12 Vibration transmission member 13 Arm 14 Pads 15 Support member 16 First support member 17 Second support member 18, 18A to 18I Third support member 51 TD Case 52 Ultrasonic transducer 121 Treatment Department 122~124 groove 131 Arm body 132 Bearing section 180 Stepped section 181 Large diameter section 182 Small diameter section 183 Support member body 184 Cone truncated part 185 Support member body 186 First truncated cone 187 Second truncated cone 188 Ring 189 Cone truncated part 190 Stepped section 191 Return part 192 First C-Ring 193 Second C-Ring 1921 C-ring body 1922 Protrusion 1923 Notch Ar1 Tip side Ar2 Base end Ax1 center axis C Electrical cable P1~P3 node position Pi1 rotation axis Pi2 Drive Axis PI Inner Pipe SL Slit TH1, TH2 thickness dimensions TI inner tube TI1 1st Inner Tube TI2 2nd Inner Tube TIP part

Claims

1. A vibration transmission member that transmits ultrasonic vibrations from the base end to the tip end; a tube through which the vibration transmission member is inserted; a hard member made of a resin material harder than the tube, the hard member being provided at a node position of ultrasonic vibration and on an outer peripheral surface of the vibration transmitting member, the hard member being in contact with an inner peripheral surface of the tube; A pipe covering an outer peripheral surface of the tube, The tube is The ultrasonic treatment device has a thickness dimension at a portion compressed between the pipe and the hard member that is smaller than the thickness dimension at other portions.

2. The hard member is 2. The ultrasonic treatment device according to claim 1, wherein the vibration transmitting member is provided at a most proximal node position among node positions of the ultrasonic vibration on the outer circumferential surface of the vibration transmitting member.

3. The hard member is 2. The ultrasonic treatment device according to claim 1, wherein the first hard member and the second hard member are combined together.

4. The hard member is 2. The ultrasonic treatment device according to claim 1, further comprising a slit formed in an annular shape and extending from one end to the other end in the longitudinal direction of the vibration transmission member.

5. The tube is 2. The ultrasonic treatment device according to claim 1, which is made of a resin material of perfluoroethylene propene copolymer.

6. The hard member is 2. The ultrasonic treatment device according to claim 1, which is made of any one of resin materials selected from the group consisting of polytetrafluoroethylene, polyether ether ketone, polyphenylsulfone, and polyoxymethylene.

7. The tube is 2. The ultrasonic treatment device according to claim 1, wherein the hard member is partially expanded.

8. The hard member is 2. The ultrasonic treatment device according to claim 1, further comprising a tapered portion which is formed in an annular shape and whose outer diameter dimension changes along the longitudinal direction of the vibration transmission member.

9. The tapered portion is 9. The ultrasonic treatment device according to claim 8, further comprising a first tapered portion having an outer diameter that decreases toward the distal end.

10. The tapered portion is 9. The ultrasonic treatment device according to claim 8, further comprising a second tapered portion having an outer diameter that decreases toward the base end.

11. The vibration transmission member further includes a jaw that opens and closes relative to the vibration transmission member. The vibration transmission member and the jaw include:

2. The ultrasonic treatment device according to claim 1, further comprising electrodes for passing a high-frequency current between said vibration transmitting member and said jaw.

12. At the base end side of the pipe, The ultrasonic treatment device according to claim 11, further comprising an operating handle for opening and closing the jaw relative to the vibration transmission member in response to an operation by a user.

13. A vibration transmission member that transmits ultrasonic vibrations from the base end to the tip end; a jaw that opens and closes relative to the vibration transmission member; a hard member provided on an outer circumferential surface of the vibration transmission member; a tube into which the vibration transmission member is inserted and whose inner circumferential surface is in contact with the hard member; A pipe covering an outer peripheral surface of the tube, The hard member is The ultrasonic vibration sensor is made of a resin material harder than the tube, and is provided at the most proximal node position of the ultrasonic vibration nodes. The tube is The ultrasonic treatment tool has a portion expanded by the hard member and contacts the inner peripheral surface of the pipe at a position spaced from the hard member in the longitudinal direction of the vibration transmission member.

14. The tube is The ultrasonic treatment device according to claim 13, wherein the hard member expands the tube toward the tip side and contacts the inner circumferential surface of the pipe at a position spaced from the hard member toward the tip side.

15. The hard member includes: A barb is provided to turn up the tube, The tube is The ultrasonic treatment device according to claim 13, wherein the end turned up by the barb portion abuts against an inner peripheral surface of the pipe.

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