Treatment tools

Abstract

To provide a treatment tool which efficiently transmits force required for operating a movable handle, for reducing a force amount.SOLUTION: A treatment tool 1 comprises: a movable handle 5; a transmission member 7; and a link member 6 whose one end is rotatably supported to a second rotary shaft Rx2 on a connection part 53 of the movable handle 5, and whose the other end is rotatably supported to a third rotary shaft Rx3 on the transmission member, the link member being coupled to the movable handle 5 and the transmission member 7. The link member 6 moves the transmission member 7 to a tip side along a longitudinal axis direction of a shaft 10, with a first rotary shaft Rx1 as a fulcrum, when the movable handle 5 is moved in a direction approaching the fixing handle 42 according to an operation of an operator to the movable handle 5.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a treatment tool. [Background technology]

[0002] Conventionally, a treatment tool that applies treatment energy to a region of biological tissue that is the target of treatment (hereinafter referred to as the target region) is known (see, for example, Patent Document 1). In Patent Document 1, a link is connected to one end of a trigger that functions as a movable handle, and to the other end of a drive member that loads the jaw and operates the jaw, and when a user operates the trigger, the link advances the drive member, thereby operating the jaw. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-235117 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the smaller the force used to grip the movable handle of the treatment tool as described above, the less strain the operator will have, so there is room for further improvement.

[0005] The present disclosure has been made in consideration of the above, and aims to provide a treatment tool that can reduce the amount of force required to operate a movable handle by efficiently transmitting the force required. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, a treatment tool according to the present disclosure includes a first gripping piece, a second gripping piece configured to be openable and closable relative to the first gripping piece and gripping biological tissue between the first gripping piece and the second gripping piece, a long shaft member having a distal end and a proximal end and formed along a longitudinal axis and transmitting a driving force for opening and closing the first gripping piece and the second gripping piece provided at the distal end, a housing having a fixed handle and to which the proximal end of the long shaft member is connected, and a connecting part that is rotatably supported around a first rotation axis within the housing and extends from the first rotation axis toward the distal end, and that can be moved in a direction toward or away from the fixed handle. a movable handle that moves along the longitudinal axis direction within the housing, a transmission member that is movable along the longitudinal axis direction and is capable of transmitting a force generated by gripping the movable handle to the longitudinal axis member, and a link member that has one end rotatably supported on a second rotation axis at the connection portion and the other end rotatably supported on a third rotation axis at the transmission member, and that connects the movable handle and the transmission member, and when the movable handle moves in a direction approaching the fixed handle in response to operation of the movable handle by an operator, the link member moves the transmission member toward the tip along the longitudinal axis direction with the first rotation axis as a fulcrum. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to reduce the force required to operate the movable handle and improve operability. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a treatment tool according to an embodiment. [Figure 2] FIG. 2 is a diagram illustrating the configuration of a processing tool according to one embodiment. [Figure 3] FIG. 3 is a diagram illustrating the configuration of a processing tool according to one embodiment. [Figure 4] FIG. 4 is a diagram illustrating the configuration of a processing tool according to one embodiment. [Figure 5] FIG. 5 is a diagram illustrating the configuration of a processing tool according to one embodiment. [Figure 6] FIG. 6 is a diagram illustrating the configuration of a processing tool according to one embodiment. [Figure 7] FIG. 7 is a diagram illustrating the configuration of a processing tool according to one embodiment. [Figure 8] FIG. 8 is an enlarged view of a connection portion of a movable handle provided in a processing tool according to one embodiment. [Figure 9] FIG. 9 is an enlarged view of a state in which a link member is connected to a connection portion of a movable handle provided in a processing tool according to one embodiment. [Figure 10] FIG. 10 is a schematic diagram of a link member provided in a processing tool according to one embodiment. [Figure 11] FIG. 11 is a schematic diagram showing the configuration of a transmission member provided in a processing tool according to one embodiment. [Figure 12] FIG. 12 is a view showing a state in which a link member and a movable handle are connected to a transmission member included in a processing tool according to one embodiment. [Figure 13] FIG. 13 is a view showing a state in which a link member, a movable handle, and an opening / closing mechanism are connected to a transmission member included in a processing tool according to one embodiment. [Figure 14] FIG. 14 is a diagram for schematically explaining a rotational force caused by a movable handle provided in a processing tool according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, with reference to the drawings, a description will be given of modes for carrying out the present invention (hereinafter, "embodiments"). Note that the invention of the present disclosure is not limited to the embodiments described below. Furthermore, each drawing referred to in the following description merely shows a schematic representation of the shape, size, and positional relationship to the extent that the contents of the present disclosure can be understood. In other words, the present disclosure is not limited to only the shape, size, and positional relationship exemplified in each drawing. Furthermore, in the description of the drawings, the same parts are denoted by the same reference numerals.

[0010] [General configuration of treatment tool] FIG. 1 is a diagram showing a schematic configuration of a treatment tool according to an embodiment of the present disclosure. The treatment tool 1 shown in FIG. 1 applies ultrasonic energy and high-frequency energy to a region of biological tissue to be treated (hereinafter referred to as "target region"), thereby treating the target region. Here, treatment refers to coagulation (sealing) and incision of the target region, etc. Alternatively, coagulation and incision may be performed simultaneously as treatment. As shown in FIG. 1, the treatment tool 1 includes a handpiece 2 and an ultrasonic transducer 3.

[0011] 2 to 7 are diagrams illustrating the configuration of the treatment tool 1. Specifically, FIG. 2 is a cross-sectional view of the treatment tool 1 cut along an XZ plane including the central axis Ax and viewed from the +Y-axis side. FIGS. 3 and 4 are side views of the treatment tool 1 with a portion of the housing 4 removed and with the ultrasonic transducer 3 removed from the handpiece 2. FIGS. 5 and 6 are cross-sectional views of the treatment tool 1 cut along an XZ plane including the central axis Ax and viewed from the +Y-axis side, and with the ultrasonic transducer 3 removed from the handpiece 2. FIG. 7 is a side view of a main part of the housing of the treatment tool 1. In the following, the configuration of the treatment tool 1 will be described using XYZ coordinate axes, i.e., the X-axis, Y-axis, and Z-axis, which are orthogonal to each other. The X-axis is an axis parallel to the central axis Ax (FIG. 1) of the shaft 10, which will be described later. The Y-axis is an axis perpendicular to the X-axis in FIG. 1. The Z-axis is an axis extending in the vertical direction in FIG. 1. In the following description, one side along the central axis Ax (+X axis side) will be referred to as a distal side Ar1, and the other side (-X axis side) will be referred to as a proximal side Ar2.

[0012] As shown in Figures 1 to 7, the handpiece 2 includes a housing 4 (Figures 1, 2 to 7), a movable handle 5 (Figures 1, 2 to 6), a link member 6 (Figures 5, 6), a transmission member 7 (Figures 3 to 6), a rotating knob 9 (Figures 1, 3 to 6), a switch 8 (Figures 1, 2 to 6), a shaft 10 (Figures 1, 2), an opening / closing mechanism 11 (Figures 3 to 6), a jaw 12 (Figures 1, 2), a vibration transmission member 13 (Figures 1 to 6), and a biasing member 14 (Figures 3 to 6).

[0013] The housing 4 supports the entire treatment tool 1. The housing 4 includes a substantially cylindrical case body 41 that is coaxial with the central axis Ax, and a fixed handle 42 that extends from the case body 41 toward the −Z axis side and is held by an operator such as a surgeon.

[0014] The case main body 41 has a groove portion 411 (Figure 7) into which the transmission member 7 is inserted and into which the transmission member 7 is fitted so as to be movable back and forth in response to the opening and closing operation of the movable handle 5, a holding portion 412 (Figure 7) that holds the opening and closing mechanism 11, and a first rotation axis Rx1 (fulcrum) that supports the movable handle 5.

[0015] The movable handle 5 accepts a closing operation and an opening operation by an operator such as a surgeon. Here, the closing operation refers to an operation in which the operator such as a surgeon places the palm of their hand on the fixed handle 42 and grips the movable handle 5 with their fingers. Furthermore, the opening operation refers to an operation in which the operator such as a surgeon releases their grip.

[0016] The movable handle 5 is located inside the housing 4. The movable handle 5 is rotatably supported around a first rotation axis Rx1 (fulcrum) parallel to the Y axis. The movable handle 5 has a grip portion 51, a handle base portion 52, and a connection portion 53.

[0017] The grip portion 51 is a portion that receives a closing operation and an opening operation by an operator such as a surgeon, and is located outside the housing 4.

[0018] Handle base 52 extends from the upper end of grip 51 and is rotatably supported about a first rotation axis Rx1 (see FIGS. 3 to 6). A connecting part 53 is formed on the end of handle base 52 on the +Z axis side, extending from first rotation axis Rx1 (fulcrum) toward the tip.

[0019] Fig. 8 is an enlarged view of the connection portion 53 of the movable handle 5. Fig. 9 is an enlarged view of the state in which the link member 6 is connected to the connection portion 53 of the movable handle 5.

[0020] As shown in FIGS. 8 and 9, the connection portion 53 extends from the first rotation axis Rx1 (fulcrum) toward its tip and is bifurcated to protrude toward the +X-axis side. The connection portion 53 has a hole 54 at its base end and a hole 55 at its tip. The first rotation axis Rx1 provided in the case main body 41 is inserted into the hole 54, and the connection portion 53 is rotatably supported about the first rotation axis Rx1. Furthermore, the connection portion 53 rotatably supports the link member 6 about the second rotation axis Rx2 by inserting a pin 56 into the hole 55 with the link member 6 housed therein (FIG. 9). The second rotation axis Rx2 is located above the first rotation axis Rx1 on the connection portion 53 (see FIGS. 3 to 6, 8, and 9).

[0021] The link member 6 is connected to both the movable handle 5 and the transmission member 7. Specifically, the base end of the link member 6 is rotatably supported on the second rotation axis Rx2 at the connection portion 53, and the tip end is rotatably supported on the third rotation axis Rx3 at the transmission member 7 (see FIGS. 5 and 6). The link member 6 is disposed between the first rotation axis Rx1 and the central axis Ax in the longitudinal axis direction of the inner pipe 111 within the housing 4. Specifically, when the extending direction of the fixed handle 42 with respect to the housing 4 is considered to be the downward side (-X axis side), the link member 6 is disposed within the housing 4 above the first rotation axis Rx1 (+X axis side).

[0022] Fig. 10 is a schematic diagram of the link member 6. As shown in Fig. 10, the link member 6 has an elliptical shape with some thickness, and includes a hole 61 and a hole 62. The link member 6 has a pin 56 that functions as a second rotation axis Rx2 inserted into the hole 61, which connects the link member 6 to the connection portion 53, and is rotatably supported about the second rotation axis Rx2 (see Fig. 9). Furthermore, the link member 6 has a pin 75 that functions as a third rotation axis Rx3 inserted into the hole 62, which connects the link member 6 to the transmission member 7, and is rotatably supported about the third rotation axis Rx3 (see Figs. 5 and 6).

[0023] The transmission member 7 is movable along the longitudinal axis within the housing 4, and transmits the force generated by gripping the movable handle 5 to an inner pipe 111 of the opening / closing mechanism 11, which will be described later. The transmission member 7 also engages with a slider 114 of the opening / closing mechanism 11, which will be described later.

[0024] Fig. 11 is a schematic diagram showing the configuration of the transmission member 7. Fig. 12 is a diagram showing a state in which the link member 6 and the movable handle 5 are connected to the transmission member 7. Fig. 13 is a diagram showing a state in which the link member 6, the movable handle 5, and the opening / closing mechanism 11 are connected to the transmission member 7.

[0025] 11 to 13, the transmission member 7 has an engaging portion 71 that engages with the slider 114 that constitutes the opening / closing mechanism 11, a storage portion 72 that stores the link member 6 and the connection portion 53 therein, cylindrical protrusions 73 provided on the front and rear sides of the storage portion 72, and a hole 74. With the link member 6 and the connection portion 53 of the movable handle 5 stored in the storage portion 72, the transmission member 7 supports the link member 6 rotatably about the third rotation axis Rx3 by inserting a pin 75 into the hole 74. The protrusion 73 is inserted into a groove 411 in the case main body 41 of the housing 4, and moves back and forth within the groove 411 along the longitudinal axis of the shaft 10 in response to the operation of the link member 6 and the movable handle 5.

[0026] 1 and 3 to 6, the switch 8 is provided in a state where it is exposed to the outside from the side surface of the distal end side Ar1 of the housing 4. The switch 8 receives a treatment operation by an operator such as a surgeon. This treatment operation is an operation for applying treatment energy to a target site.

[0027] The rotation knob 9 has a generally cylindrical shape coaxial with the central axis Ax, and is provided on the distal end side Ar1 of the housing 4, as shown in FIGS. 1 and 3 to 6. The rotation knob 9 is rotated by an operator such as a surgeon. This rotation causes the rotation knob 9 to rotate about the central axis Ax relative to the housing 4. Furthermore, the rotation of the rotation knob 9 causes the jaw 12 and the vibration transmission member 13 to rotate about the central axis Ax.

[0028] The shaft 10 is a cylindrical pipe made of a material such as metal. The outer circumferential surface of the shaft 10 is covered with an electrically insulating outer tube TO (FIG. 2). A pin 101 (FIG. 2) is fixed to the end of the tip side Ar1 of the shaft 10. The pin 101 extends in a direction perpendicular to the plane of the paper in FIGS. 1 and 2 and supports the jaw 12 rotatably about a fourth rotation axis Rx4 (FIG. 2). A notch 102 is formed on the +Z-axis side of the end of the tip side Ar1 of the shaft 10, extending from the tip toward the base side Ar2.

[0029] The opening / closing mechanism 11 is a mechanism that opens and closes the jaw 12 relative to an end 131 (hereinafter referred to as a treatment portion 131) on the distal end side Ar1 of the vibration transmission member 13 in response to an opening operation and a closing operation of the movable handle by an operator such as a surgeon. The opening / closing mechanism 11 includes an inner pipe 111 (FIG. 2), a holding portion 112 (FIGS. 5 and 6), a slider receiver 113 (FIGS. 5 and 6), and a slider 114 (FIGS. 3 to 6).

[0030] The inner pipe 111 is a cylindrical pipe with a diameter smaller than that of the shaft 10. The inner pipe 111 is inserted into the shaft 10 in a state where it is coaxial with the shaft 10. As shown in FIG. 2, an arm portion 1111 that protrudes toward the tip side Ar1 is provided on the +Z-axis side of the end of the tip side Ar1 of the inner pipe 111. A pin 121 that is provided on the jaw 12 and extends in a state where it is parallel to the fourth rotation axis Rx4 (pin 101) is inserted into the arm portion 1111. The inner pipe 111 corresponds to the long shaft member according to the present disclosure.

[0031] The holding portion 112 is made of an electrically insulating material such as resin and has a substantially cylindrical shape. As shown in FIGS. 5 and 6 , the holding portion 112 is inserted into the rotating knob 9 and the housing 4 in a state spanning the rotating knob 9 and the housing 4. The holding portion 112 holds the vibration transmission member 13 inserted therein. The holding portion 112 is also mechanically connected to the rotating knob 9 and the shaft 10 at the end of the distal end side Ar1. That is, the holding portion 112, the shaft 10, the jaw 12, and the vibration transmission member 13 rotate together with the rotating knob 9 around the central axis Ax in response to a rotation operation of the rotating knob 9 by an operator such as a surgeon.

[0032] The slider receiver 113 is made of an electrically insulating material such as resin and has a substantially cylindrical shape. With the holding portion 112 inserted therein, the slider receiver 113 is disposed so as to be movable along the central axis Ax relative to the holding portion 112. Here, an end portion on the distal end side Ar1 of the slider receiver 113 is connected to an end portion on the proximal end side Ar2 of the inner pipe 111 in a state in which movement along the central axis Ax relative to the holding portion 112 is permitted but rotation about the central axis Ax is restricted. In other words, the slider receiver 113 and the inner pipe 111 rotate together with the rotary knob 9 about the central axis Ax in response to a rotation operation of the rotary knob 9 by an operator such as a surgeon.

[0033] The slider 114 has a substantially cylindrical shape, and with the slider receiver 113 inserted therein, is disposed so as to be movable along the central axis Ax relative to the slider receiver 113. As described above, the slider 114 is engaged with the movable handle 5 via the transmission member 7 and the link member 6.

[0034] At least a portion of the jaw 12 is made of a conductive material. The jaw 12 corresponds to a second gripping piece according to the present disclosure.

[0035] The vibration transmission member 13 is made of a conductive material and has an elongated shape extending linearly along the central axis Ax. As shown in FIG. 2, the vibration transmission member 13 is inserted into the inner pipe 111 with the treatment portion 131 protruding outward. At this time, the end of the proximal side Ar2 of the vibration transmission member 13 is mechanically connected to the ultrasonic transducer 3 as shown in FIG. 1. That is, the vibration transmission member 13 transmits ultrasonic vibrations generated by the ultrasonic transducer 3 from the end of the proximal side Ar2 to the treatment portion 131. In the embodiment of the present disclosure, the ultrasonic vibrations are longitudinal vibrations vibrating in a direction along the central axis Ax. Note that the outer circumferential surface of the vibration transmission member 13 is covered with an electrically insulating inner tube TI (FIG. 2) to ensure electrical insulation between the shaft 10, the inner pipe 111, and the vibration transmission member 13. The vibration transmission member 13 corresponds to a first gripping piece according to the present disclosure.

[0036] The ultrasonic transducer 3 generates ultrasonic vibrations under the control of a control device (not shown). Specifically, the ultrasonic transducer 3 generates longitudinal vibrations (ultrasonic vibrations) that vibrate in a direction along the central axis Ax based on driving power supplied from the control device (not shown). The treatment portion 131 (see FIG. 2) vibrates at a desired amplitude due to the longitudinal vibrations. Then, ultrasonic vibrations are applied from the treatment portion 131 to the target area grasped between the jaw 12 and the treatment portion 131. In other words, ultrasonic energy is applied from the treatment portion 131 to the target area.

[0037] Furthermore, for example, when applying high-frequency energy to a target area, a control device (not shown) supplies high-frequency power between the jaw 12 and the vibration transmission member 13 via an electric cable. As a result, a high-frequency current flows through the target area grasped between the jaw 12 and the treatment portion 131. In other words, high-frequency energy is applied to the target area.

[0038] [Operation of treatment tool] Next, an explanation will be given of the operation of the movable handle 5 by an operator such as a surgeon. FIG. 14 is a diagram for schematically explaining the rotational force exerted by the movable handle 5.

[0039] As shown in FIG. 14, when an operator such as a surgeon performs a closing operation on the movable handle 5 (from the state in FIGS. 3 and 5 to the state in FIGS. 4 and 6), a rotational force P1 (point of application) is generated in the forward direction (tip side) of the treatment tool 1. Therefore, the force generated by the closing operation by the operator is also transmitted in the forward direction (see arrow Qx) via the movable handle 5, the link member 6, and the transmission member 7. That is, in the treatment tool 1, the link member 6 is disposed above the first rotation axis Rx1 of the movable handle 5, and the second rotation axis Rx2 is positioned higher than the first rotation axis Rx1. Therefore, the direction of the force B1 generated when the treatment tool 1 rotates around the first rotation axis Rx1 is also directed forward. In other words, in the treatment tool 1, the link member 6, which functions as the point of application, is positioned higher than the first rotation axis Rx1, which functions as the fulcrum. Therefore, the component force along the longitudinal direction of the shaft 10 coincides with the direction in which the link member 6 is provided.

[0040] As a result, an operator such as a surgeon can move the slider 114 forward by moving the transmission member 7 forward along the groove portion 411 with little force and stroke, so that the target area can be easily grasped by the jaw 12 and the vibration transmission member 13.

[0041] Furthermore, when the treatment tool 1 performs a closing operation on the movable handle 5 (from the state in Figures 3 and 5 to the state in Figures 4 and 6), a rotational force P1 is generated in the forward direction (tip side) of the treatment tool 1, so that the space D1 (Figures 3 to 6) behind the housing 4 can be enlarged, thereby allowing for freedom in design of the shape of the ultrasonic transducer 3.

[0042] According to the embodiment described above, when the movable handle 5 moves in a direction approaching the fixed handle 42 in response to an operation of the movable handle 5 by the operator, the link member 6 moves the transmission member 7 toward the tip side along the longitudinal direction of the shaft 10, with the first rotation axis Rx1 as a fulcrum. Therefore, the force required to operate the movable handle 5 can be efficiently transmitted, thereby reducing the amount of force required.

[0043] Furthermore, according to one embodiment, the link member 6 is positioned between the central axis Ax in the longitudinal direction of the inner pipe 111 within the housing 4 and the first rotation axis Rx1, so that the direction of the force B1 generated when the movable handle 5 rotates around the first rotation axis Rx1 is also forward, and therefore an operator such as a surgeon can move the slider 114 forward by moving the transmission member 7 forward along the groove portion 411 with a small amount of force and stroke.

[0044] Furthermore, according to one embodiment, the first rotation axis Rx1 is provided at a fixed position relative to the housing 4, so that the movable handle 5 can be easily attached during manufacturing.

[0045] (Other embodiments) Although the embodiments for carrying out the present disclosure have been described above, the present disclosure should not be limited to only the above-described embodiments. In the above-described embodiment, a configuration in which both ultrasonic energy and high-frequency energy are applied to the target area is adopted, but this is not limited thereto. For example, a configuration in which only ultrasonic energy is applied to the target area, a configuration in which only high-frequency energy is applied to the target area, a configuration in which only energy other than ultrasonic energy and high-frequency energy is applied to the target area, or a combination of these configurations may be adopted.

[0046] Furthermore, although the embodiment is described as an inner pipe drive, the present invention is not limited to this and may be applied to, for example, an outer pipe drive.

[0047] Although some of the embodiments of the present application have been described in detail above with reference to the drawings, these are merely examples, and the present invention can be implemented in other forms that have undergone various modifications and improvements based on the knowledge of those skilled in the art, including the aspects described in the disclosure of the present invention. [Explanation of symbols]

[0048] 1 Treatment tools 2 handpieces 3 Ultrasonic Transducers 4. Housing 5 Movable handle 6 Link member 7 Transmission components 8 Switch 9 Rotating Knob 10 shaft 11 Opening and closing mechanism 12 Joe 13 Vibration transmission member 14 biasing member 41 Case body 42 Fixed Handle 51 Gripping part 52 Handle base 53 Connection 54,55,61,62,74 Hole 56,75,101,121 pins 71 Engagement part 72 Storage unit 73 Protrusion 102 Notch 111 Inner pipe 112,412 Holding part 113 Slider holder 114 Slider 131 Treatment Department 411 Groove 1111 Arm Ar1 tip side Ar2 base end Ax center axis Rx1 First rotation axis Rx2 Second rotation axis Rx3 Third rotation axis Rx4 Fourth rotation axis TI inner tube TO outer tube

Claims

1. A first gripping piece; a second gripping piece configured to be openable and closable relative to the first gripping piece and configured to grip biological tissue between the first gripping piece and the second gripping piece; a long shaft member having a tip end and a base end, formed along a longitudinal axis, and transmitting a driving force for opening and closing the second gripping piece provided at the tip end; a housing having a fixed handle and connected to the proximal end of the elongate member; a movable handle that is rotatably supported around a first rotation axis within the housing, has a connection portion that extends from the first rotation axis toward the tip, and moves in a direction toward or away from the fixed handle; a transmission member that is movable along the longitudinal axis direction within the housing and that is capable of transmitting a force generated by gripping the movable handle to the longitudinal shaft member; a link member having one end rotatably supported on the second rotation shaft of the connection portion and the other end rotatably supported on the third rotation shaft of the transmission member, the link member connecting the movable handle and the transmission member; a holding portion that holds the long shaft member; a slider receiver through which the holding portion is inserted and which is movable along the longitudinal axis direction relative to the holding portion; a slider through which the slider receiver is inserted and which is movable relative to the slider receiver; Equipped with The link member is When the movable handle moves in a direction approaching the fixed handle in response to an operation of the movable handle by an operator, the transmission member is moved toward the distal end side along the longitudinal axis direction with the first rotation shaft as a fulcrum, The transmission member is engaged with the slider, Treatment tools.

2. The treatment tool according to claim 1, The link member is The housing is provided with a first rotation axis and a second rotation axis. Treatment tools.

3. The treatment tool according to claim 1, The first rotation axis is The housing is provided in a fixed position. Treatment tools.

4. The treatment tool according to claim 1, The transmission member is the link member and the slider are connected to each other on the distal end side of the first rotation shaft in the longitudinal axis direction; Treatment tools.

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