Forceps device

Abstract

The present invention comprises: a grasping part; a plurality of wires that are coupled to the grasping part and that transmit a drive force for operating the grasping part; a cable that is coupled to the grasping part and that moves in the same direction as a portion of the plurality of wires if said portion of the plurality of wires is pulled to operate the grasping part; and a cylindrical part that guides the plurality of wires and the cable to the grasping part. The cable supplies an electric current to the grasping part. The cable and said portion of the plurality of wires are fixed in the cylindrical part by a fixing member.

Description

forceps device

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to medical forceps devices.

[0002] In surgical procedures, a forceps device (hereinafter also referred to as a manipulator) having a movable part attached to the distal end of a thin and long shaft is used. The movable part is, for example, a gripping part that can be opened and closed, and a wire for transmitting a driving force is connected to the gripping part. In surgical procedures using a surgical robot, a forceps device is used that can incise or cauterize biological tissue by passing a high-frequency current through a pair of movable parts. Such a forceps device is also called a bipolar forceps (hereinafter also referred to as a bipolar forceps) and can achieve minimal invasiveness to the patient. The bipolar forceps disclosed in Patent Document 1 divides the current-carrying path of a cable at a joint and connects the two divided paths electrically by a rotating member. This prevents twisting of the cable when the gripping part rotates around the shaft axis while maintaining a current-carrying state.

[0003] JP 2012-070857 A

[0004] However, in the forceps device described above, when the gripping portion opens and closes using the wire, the cable connected to the gripping portion may also passively move. In this case, the cable moves relative to the wire, causing the cable to bend or flex. As a result, the tensile force pulling the wire may decrease, hindering smooth opening and closing of the gripping portion. Furthermore, if the bent or flexed cable gets caught in a joint, the cable may break or the coating may be damaged, resulting in poor conductivity or a short circuit when electricity is applied. Therefore, an object of the present disclosure is to provide a forceps device that allows smooth opening and closing operations.

[0005] A forceps device according to one aspect of the present disclosure includes a gripping portion, a plurality of wires connected to the gripping portion and transmitting a driving force for operating the gripping portion, a cable connected to the gripping portion and moving in the same direction as some of the plurality of wires when the gripping portion operates by pulling the some of the wires, and a tubular portion that guides the plurality of wires and the cable to the gripping portion, wherein the cable supplies an electric current to the gripping portion, and the cable and some of the wires are fixed within the tubular portion by a fixing member.

[0006] According to the present disclosure, it is possible to provide a forceps device that is capable of smooth opening and closing operations.

[0007] FIG. 1 is a cross-sectional view illustrating the overall configuration of a forceps device 10 according to a first embodiment. FIG. 2 is a cross-sectional view taken along line A-A of the forceps device 10 shown in FIG. 1. FIGS. 3(a) and 3(b) are diagrams illustrating the arrangement of wires 30, 32 and a cable 50 of the forceps device 10 shown in FIG. 1. FIG. 4 is a schematic view illustrating the positional relationship between a fixing member 22 and a connecting portion 18 of the forceps device 10 according to the first embodiment. FIGS. 5(a) and 5(b) are schematic views illustrating the positional relationship between a fixing member 22 and a irrigation tube of the forceps device 10 according to the first embodiment. FIG. 6 is a schematic view illustrating the positional relationship between the fixing members 22 of the forceps device 10 according to the first embodiment. FIG. 7 is a schematic view illustrating a cross section of a fixing member 24 of a forceps device 100 according to a second embodiment.

[0008] Hereinafter, embodiments for carrying out the present disclosure will be described in detail. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. Note that in the description of the specification and drawings relating to each embodiment, components having substantially the same or corresponding functional configurations may be designated by the same reference numerals, and redundant description may be omitted.

[0009] In addition, the drawings may be emphasized or omitted as appropriate, or the proportions adjusted, to facilitate understanding, and may differ from the actual shapes, positional relationships, and proportions. Hatching lines may be omitted in cross-sectional views.

[0010] In the axial direction of the forceps device 10, the side of the gripping unit 12 at the tip is the downstream side, and the opposite side is the upstream side. In each figure, "-Z" indicates the upstream direction, and "+Z" indicates the downstream direction. "+X" indicates the right-hand direction when facing upstream from the gripping unit 12, and "-X" indicates the left-hand direction when facing upstream from the gripping unit 12. "-Y" indicates the downward direction, and "+Y" indicates the upward direction. The directions indicated by X, Y, and Z are mutually orthogonal and each serves as a three-dimensional coordinate axis. With respect to an object, the +X side may be referred to as the right side, the -X side as the left side, the +Y side as the upper side, the -Y side as the lower side, the +Z side as the front side, and the -Z side as the rear side. The X-axis direction may also be referred to as the left-right direction, the Y-axis direction as the up-down direction, and the Z-axis direction as the front-back direction.

[0011] First Embodiment Overall Configuration of the Forceps Device 10 First, the overall configuration of the forceps device 10 will be described. FIG. 1 is a schematic cross-sectional view showing an outline of the overall configuration of the forceps device 10 according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line A-A of the forceps device 10 shown in FIG. 1. The forceps device 10 according to this embodiment is a bipolar forceps adapted for use with a master-slave surgical robot. For example, the distal (+Z) end of the forceps device is provided with a joint and a gripper as movable parts. In bipolar forceps, wires 30 and 32 for driving the grippers 12, a wire 34 for driving the joint that changes the orientation of the gripper, and a cable 50 for conducting a predetermined high-frequency current to the grippers 12 are disposed inside the shaft. Because current flows through the grippers 12 themselves, insulation is required for each part. Furthermore, if the bipolar forceps are to be used repeatedly, a cleaning function is required.

[0012] The forceps device 10 includes a pair of openable and closable gripping portions 12, a tubular portion 16 that guides a plurality of wires 30, 32, 34 and a cable 50 to the gripping portions 12, a connecting portion 18 that connects the gripping portions 12 and the tubular portion 16, a cylindrical cap 20 that is disposed between the gripping portions 12 and the connecting portion 18, and a fixing member 22 that fixes the cable 50 and some of the wires 32 within the tubular portion 16. Each gripping portion 12 is provided with a plurality of wires 30, 32 that transmit a driving force to operate the gripping portion 12, and a cable 50 that supplies current to the gripping portion 12.

[0013] <Details of the forceps device 10> Next, each component of the forceps device 10 will be described. Fig. 3(a) is a diagram for explaining the arrangement of the wires 30, 32 and the cable 50 of the forceps device 10 shown in Fig. 1. Fig. 3(b) is a diagram for explaining the arrangement of the wires 30, 32 and the cable 50 when the forceps device 10 shown in Fig. 1 is viewed from the opposite side. Note that illustrations and descriptions of the internal mechanical configuration of each gripping portion 12 will be omitted. Furthermore, since the configurations of the gripping portions 12 are similar, only the gripping portion 12 on one side will be described, and a description of the gripping portion 12 on the other side will be omitted.

[0014] [Wire] As shown in Figure 3, one end of the wires 30 and 32 is connected to the jaw pulley 14 of the gripping unit 12, and the wires 30 and 32 are each separately hung on a half-circle portion of one jaw pulley 14 (the +Y side portion shown in Figure 3(a) and the -Y side portion shown in Figure 3(b)). The gripping unit 12 moves in an opening direction (hereinafter also referred to as an opening direction) when the wire 30 is pulled in the upstream direction, and moves in a closing direction (hereinafter also referred to as a closing direction) when the wire 32 is pulled in the upstream direction. Furthermore, because the wires 30 and 32 are hung on the same jaw pulley 14, when the wire 30 is pulled in the upstream direction, the wire 32 moves in the downstream direction, and when the wire 32 is pulled in the upstream direction, the wire 30 moves in the downstream direction.

[0015] The wires 30 and 32 are made of a conductive material and have tension adjusted to fall within a predetermined range. As shown in Figure 1, the wires 30 and 32 have metal shafts 40 and 42 connected to their upstream ends. Hereinafter, the wire 30 will also be referred to as an opening wire, and the wire 32 will also be referred to as an occlusion wire.

[0016] [Cable] The cable 50 is a copper conductor coated with an insulating layer. The cable 50 is disposed in a floating state in the axial direction. When the cable 50 is connected to the gripping unit 12, the gripping unit 12 becomes an electrode. One end of the cable 50 is connected to the jaw portion of the gripping unit 12, and the cable 50 is hung adjacent to the wire 32 on the half-circumference side of the jaw pulley 14 on which the wire 32 is hung. That is, when the wire 32 is pulled upstream and the gripping unit 12 moves in the closing direction, the gripping unit 12 pulls the cable 50 from the connecting portion. As a result, the cable 50 moves upstream from the connecting portion as it is pushed by the gripping unit 12.

[0017] Therefore, if the cable 50 and the wire 32 are not fixed by the fixing member 22 described below, the floating cable 50 will be pushed by the gripping portion 12, causing the cable 50 to move relative to the occlusion wire 32, which may result in unintended bending or flexing. Details of the fixing member 22 will be described later. The jaw pulley 14 of each gripping portion 12 has a portion on which the cable 50 is hung and a portion on which the wires 30, 32 are hung, which are integrally formed.

[0018] [Tubular Portion 16] The tubular portion 16 has a non-flexible cylindrical shape and functions as an insulating shaft. The tubular portion 16 preferably has as small a diameter as possible while ensuring a sufficient inner diameter to guide the wires 30, 32, 34 and the cable 50. An irrigation tube (hereinafter also referred to as an irrigation pipe) 16a, from which a cleaning solution is discharged, is provided axially at the approximate center of the cross section of the tubular portion 16. When the forceps device 10 is used repeatedly, the cleaning solution can be discharged from the irrigation pipe 16a to clean the inside of the device. Also, as shown in FIG. 2 , the tubular portion 16 contains a metal shaft 40 connected to the wire 30, a metal shaft 40 connected to the wire 34, a metal shaft 40 connected to the wire 32, and a cable 50. The metal shaft 40 connected to the wire 32 and the cable 50 are fixed by a fixing member 22.

[0019] [Connecting portion 18] The connecting portion 18 is a cylindrical resin cap. The connecting portion 18 has a first flange portion 18a that covers the end face of the tubular portion 16, a second flange portion 18b that covers the end face of the cylindrical cap 20, and a protruding portion 18c that covers the inner circumferential layers of the tubular portion 16 and the cylindrical cap 20 and protrudes radially inward.

[0020] [Cylindrical Cap 20] The cylindrical cap 20 has an outlet 20a formed on a portion of its circumferential surface for discharging the cleaning solution. The disc-shaped end of the cylindrical cap 20 also has multiple through-holes 20b for passing the wires 30, 32, 34 and the cable 50. A silicone sealing member 20c is attached to the interior of the cylindrical cap 20 to prevent liquid from seeping through the gaps in the through-holes 20b toward the gripping portion 12. The cylindrical cap 20 also has a hook portion formed on its outer periphery for hooking an insulating rubber cover 20d. Covering the area from the tip of the gripping portion 12 to the hook portion of the cylindrical cap 20 with the insulating rubber cover 20d prevents the patient's body fluids from seeping into the forceps device 10 through the outlet during surgery. The tube portion 16 is fitted onto the outside of the protruding portion 18c and sealed and fixed with adhesive 60. The cylindrical cap 20 is also fitted onto the outside of the protruding portion 18c.

[0021] [Fixing Member] The fixing member 22 is a heat-shrinkable tube (hereinafter also referred to as a tubular heat-shrinkable member) made of a fluororesin such as FEP, PTFE, or PFA. The fixing member 22 shrinks when heated while fitted around the metal shaft 40 and the cable 50 connected to the wire 32, thereby collectively restraining and fixing the cable 50 and the metal shaft 40 to each other. The cable 50 and the metal shaft 40 are partially fixed by the fixing member 22 along the axial direction of the tubular portion 16. By fixing the cable 50 and the metal shaft 40 in close contact with each other, relative movement in the axial direction is suppressed.

[0022] In this manner, by fixing the cable 50 and the portion of the wires 32 within the tubular portion 16 with the fixing member 22, when the portion of the wires 32 is pulled to move the gripping portion 12, the cable 50 and the portion of the wires 32 can move simultaneously. Furthermore, because the cable 50 and the portion of the wires 32 are hung on the same half-circle of the jaw pulley 14, they move in the same direction (upstream). That is, by preventing the cable 50 from moving relative to the portion of the wires 32, smooth opening and closing of the gripping portion 12 can be achieved. Furthermore, because the fixed cable 50 moves in the same direction as the portion of the wires 32, the cable 50 is prevented from bending or flexing and becoming caught in a joint. This prevents breakage of the cable 50 and damage to the coating, which can lead to problems such as poor conductivity and short circuits when electricity is applied.

[0023] Next, the positional relationship between the fixing member 22 and other components will be described. Here, the operating unit 60 operated by the operator is provided on the base end side of the insulated shaft. The operating unit 60 has a slider (transmission body) 60a. The slider 60a moves linearly when operated, and the wires 30, 32 move according to the amount of linear movement of the slider 60a. In other words, the wires 30, 32 and the fixing member 22 move according to the amount of operation by the operator.

[0024] In the following description, the fixing member 22 moves between the first position and the second position in accordance with the maximum amount of operation that the operator can perform. Specifically, the fixing member 22 moves to the first position in accordance with the maximum amount of operation that the operator can perform in the closing direction, and moves to the second position in accordance with the maximum amount of operation that the operator can perform in the opening direction. Note that, in this embodiment, the wires 30, 32 move in accordance with the amount of linear movement of the slider 60a. However, the present invention is not limited to this. Any configuration may be used as long as a driving force that displaces the gripping portion 12 is transmitted from the operating unit to the wires 30, 32.

[0025] <Positional Relationship Between the Fixing Member 22 and the Protruding Portion 18c> Next, the positional relationship between the fixing member 22 and the protruding portion 18c will be described. Fig. 4 is a schematic diagram for explaining the positional relationship between the fixing member 22 and the protruding portion 18c according to this embodiment. Note that Fig. 4 is a schematic diagram illustrating only the tubular portion 16, the connecting portion 18, and one of the fixing members 22, and omits the illustration of other components. As shown in Fig. 4, the fixing member 22 moves along the axial direction when the gripping portion 12 performs an opening and closing operation. Specifically, when the opening wire 30 is pulled, the fixing member 22 moves from an upstream position (first position) to a downstream position (second position). The fixing member at the first position is indicated by A in Fig. 4, and the fixing member at the second position is indicated by B in Fig. 4.

[0026] At this time, the fixing member 22 and the cylindrical portion 18 are pre-positioned with a shift in the axial direction so that the downstream end of the fixing member 22 and the upstream end of the protruding portion 18c do not overlap each other when viewed from a direction perpendicular to the axial direction (hereinafter also referred to as the radial direction) during the axial movement. In other words, a predetermined gap is formed between the downstream end of the fixing member 22 and the upstream end of the protruding portion 18c at the second position B. In other words, the fixing member 22 is positioned and its length is set so that it does not even partially overlap with the protruding portion 18c when viewed from the radial direction at the second position. This prevents the fixing member 22 from coming into contact with or getting caught on the protruding portion 18c during the movement, enabling smooth opening and closing of the grip portion 12.

[0027] <Positional Relationship Between the Fixing Member 22 and the Cleaning Pipe 16a> Next, the positional relationship between the fixing member 22 and the cleaning pipe 16a will be described. Fig. 5 is a schematic diagram illustrating the positional relationship between the fixing member 22 and the cleaning pipe 16a according to this embodiment. Note that Fig. 5 only illustrates the tubular portion 16, the cleaning pipe 16a, and one of the fixing members 22, and does not illustrate the other components. As described above, the fixing member 22 moves from a first position A to a second position B downstream when the opening wire 30 is pulled. The fixing member in the first position is indicated by A in Fig. 5, and the fixing member in the second position is indicated by B in Fig. 5.

[0028] At this time, the fixing member 22 and the cleaning pipe 16a are positioned with a predetermined axial offset so that the upstream end of the fixing member 22 and the downstream end of the cleaning pipe 16a do not overlap each other when viewed radially during axial movement. In other words, the fixing member 22 is positioned and its length is set so that it does not overlap even partially with the cleaning pipe 16a when viewed radially before and after movement, or so that it at least partially overlaps with the cleaning pipe 16a. This prevents the fixing member 22 from coming into contact with or getting caught on the cleaning pipe 16a during movement, allowing for smooth opening and closing of the gripping part 12.

[0029] <Positional Relationship Between the Fixing Members 22> Next, the positional relationship between the fixing members 22 will be described. Fig. 6 is a schematic diagram showing the positional relationship between the fixing members 22 according to this embodiment. Note that Fig. 6 only shows the tubular portion 16 and the fixing members 22, and does not show the other components. As described above, the fixing members 22 move from a first position A to a second position B downstream when the opening wire 30 is pulled. The fixing members at the first position are indicated by A in Fig. 6, and the fixing members at the second position are indicated by B in Fig. 6.

[0030] At this time, the fixing member 22 to which the occlusion wire 32 and the cable 50 of one gripping portion 12 are fixed (hereinafter also referred to as the one-side fixing member 22) and the fixing member 22 to which the occlusion wire 32 and the cable 50 connected to the other gripping portion 12 are fixed (hereinafter also referred to as the other-side fixing member 22) are pre-positioned with a shift in the axial direction so that the upstream end of the one-side fixing member 22 and the downstream end of the other-side fixing member 22 do not overlap each other when viewed in the radial direction during the axial movement process. In other words, the one fixing member 22 is positioned and its length is set so that it at least partially overlaps with the other fixing member 22 when viewed in the radial direction before and after the movement. This makes it possible to prevent the fixing members 22 from contacting or getting caught on each other during the movement process, enabling smooth opening and closing of the gripping portion 12.

[0031] In this embodiment, the fixing member 22 may be disposed so that the axial distance from its downstream end to the upstream end of the connecting portion 18 is 13.0 mm to 13.2 mm. The axial length of the fixing member 22 may be 30 mm to 32 mm. The pull-out strength of the fixing member 22 may be 20 N. This prevents the fixing member 22 from getting caught on other components and prevents the fixing member 22 from falling off.

[0032] Furthermore, in the present embodiment, the cable 50 and the blocking wire 32 are described as being fixed by the fixing member 22, but this is not limiting, and the cable 50 and the opening wire 30 may also be fixed by the fixing member 22. In this case, the fixing member 22 moves from a downstream position (second position) to an upstream position (first position) when the opening wire 30 is pulled.

[0033] Therefore, the fixed member 22 and the cylindrical portion 18 are positioned with a predetermined axial offset so that the downstream end of the fixed member 22 and the upstream end of the protruding portion 18c do not overlap each other when viewed in the radial direction during the axial movement process. That is, a predetermined gap is formed between the downstream end of the fixed member 22 and the upstream end of the protruding portion 18c at the second position B. That is, the fixed member 22 is positioned at the second position so that it does not overlap even partially with the protruding portion 18c when viewed in the radial direction, and its length is set.

[0034] Furthermore, the fixing member 22 and the cleaning pipe 16c are positioned with a predetermined offset in the axial direction so that the upstream end of the fixing member 22 and the downstream end of the cleaning pipe 16a do not overlap each other when viewed in the radial direction during the axial movement. In other words, the fixing member 22 is positioned and its length is set so that it does not overlap even partially with the cleaning pipe 16a when viewed in the radial direction before and after movement, or so that it at least partially overlaps with the cleaning pipe 16a.

[0035] Furthermore, the fixed member 22 on one side and the fixed member 22 on the other side are disposed with a shift in the axial direction in advance so that the downstream end of the fixed member 22 on one side and the upstream end of the fixed member 22 on the other side do not overlap each other when viewed in the radial direction during the process of movement in the axial direction. In other words, the fixed member 22 on one side is disposed so as to at least partially overlap with the fixed member 22 on the other side when viewed in the radial direction before and after movement, and the length thereof is set.

[0036] As described above, the forceps device 10 includes the gripper 12, the plurality of wires 30, 32 connected to the gripper 12 and transmitting a driving force for operating the gripper 12, the cable 50 connected to the gripper 12 and moving in the same direction as some of the wires 30, 32 when some of the wires 32 are pulled to operate the gripper 12, and the tubular portion 16 for guiding the plurality of wires 30, 32 and the cable 50 to the gripper 12, the cable supplying current to the gripper 12, and the cable 50 and some of the wires 32 being fixed within the tubular portion 16 by a fixing member 22. This allows the cable 50 and the wires 32 to move simultaneously, thereby preventing unintended bending or flexing of the cable 50, which could cause contact with other wires 30 or cables 50 or a decrease in the tensile force pulling the wire 32. Therefore, a forceps device 10 capable of smooth opening and closing operations can be provided.

[0037] Furthermore, by moving the fixed cable 50 in the same direction as some of the wires 32, it is possible to prevent the cable 50 from getting caught in the joint, and to prevent breakage of the cable 50 or damage to the coating film, which can lead to problems such as poor conductivity or short circuits when electricity is applied.

[0038] Furthermore, since the wire 50 and the cable 32 are fixed by the heat shrinkage of the tubular heat-shrinkable member, it is possible to prevent a reduction in the space in the radial direction of the shaft, which would otherwise be required by adding the fixing member 22. Furthermore, it is possible to reduce the size and weight of the forceps device 10.

[0039] Second Embodiment Next, a forceps device 100 according to a second embodiment of the present disclosure will be described with reference to Fig. 7. The basic configuration of the forceps device 100 of this embodiment is similar to that of the first embodiment, but differs from that of the first embodiment in the configuration of the fixing member 24. Therefore, in this embodiment, the fixing member 24 will be described using Fig. 7, and a description of other components will be omitted. Note that Fig. 7 is a schematic diagram for describing a cross section of the fixing member 24 according to this embodiment.

[0040] As shown in FIG. 7 , this embodiment differs from the first embodiment in that an adhesive layer 64 is disposed inside the fixing member 24 so as to cover the occlusion wire 32 to which the cable 50 and the metal shaft 40 are connected. The cable 50 and the metal shaft 40 are bonded to each other with an adhesive 62 before being placed over the fixing member 24. This fills the gap between the cable 50 and the metal shaft 40, and the adhesive layer 64 is formed to collectively cover the cable 50 and the metal shaft 40. The fixing member 24 is placed over the adhesive layer 64 and fixed by heat shrinkage, thereby tightly adhering the adhesive layer 64 to the fixing member 24 and fixing it thereto. This prevents foreign matter from entering between the fixing member 24 and the cable 50 and the metal shaft 40.

[0041] Although the forceps device has been described above using embodiments, the present disclosure is not limited to the above embodiments, and various modifications and improvements, such as combinations or substitutions with part or all of other embodiments, are possible within the scope specified in the claims.

[0042] REFERENCE SIGNS LIST 10, 100 Forceps device 12 Grip portion 14 Jaw pulley 16 Cylindrical portion 16a Irrigation tube (irrigation pipe) 18 Connection portion 18a First flange portion 18b Second flange portion 18c Projection portion 20 Cylindrical cap 20a Discharge port 20b Through hole 20c Sealing member 20d Rubber cover 22, 24 Fixing member 30, 32, 34 Wire 40, 42 Metal shaft 50 Cable 62 Adhesive 64 Adhesive layer A Fixing member at first position B Fixing member at second position

Claims

1. A forceps device comprising: a gripping portion; a plurality of wires connected to the gripping portion for transmitting a driving force for operating the gripping portion; a cable connected to the gripping portion for moving in the same direction as some of the plurality of wires when the gripping portion operates by pulling the some of the wires; and a tubular portion for guiding the plurality of wires and the cable to the gripping portion, wherein the cable supplies an electric current to the gripping portion, and the cable and some of the wires are fixed within the tubular portion by a fixing member.

2. The forceps device according to claim 1, further comprising a metal shaft connected to the upstream ends of the plurality of wires, wherein the cable and the metal shaft fixed to some of the wires are partially fixed by the fixing member along the axial direction of the tubular portion.

3. A forceps device according to claim 2, further comprising a connecting portion connecting the gripping portion and the tubular portion, the connecting portion having a protruding portion protruding radially inward from the inner surface of the tubular portion, the fixing member moving along the axial direction in response to the movement of the gripping portion, and the fixing member and the tubular portion being positioned with a pre-determined offset in the axial direction so that the downstream end of the fixing member and the upstream end of the protruding portion do not overlap each other during the movement of the fixing member.

4. A forceps device according to claim 3, further comprising a cleaning pipe provided within the tubular portion and through which a cleaning solution is discharged, wherein the fixing member and the cleaning pipe are positioned such that they are offset in advance in the axial direction so that the upstream end of the fixing member and the downstream end of the cleaning pipe do not overlap each other during the movement of the fixing member.

5. A forceps device according to claim 4, wherein there are a pair of gripping portions, each of which has a fixing member to which the part of the wire and the cable are fixed, and the fixing member of the gripping portion on one side and the fixing member of the gripping portion on the other side are positioned with a shift in the axial direction in advance so that the upstream end of the fixing member on one side and the downstream end of the fixing member of the gripping portion on the other side do not overlap each other during the movement of the fixing member on one side.

6. A forceps device according to claim 2, wherein there are a pair of gripping portions, each of which is connected to an opening wire, a closing wire, and the cable, and when one of the wires is the opening wire, the cable and the opening wire are fixed by the fixing member, and when one of the wires is the closing wire, the cable and the closing wire are fixed by the fixing member.

7. A forceps device according to any one of claims 1 to 6, wherein the fixing member is a tubular heat-shrinkable member that is attached along the outer periphery of the cable and the portion of the wires and shrinks when heated, so that the cable and the portion of the wires are fixed in a state of close contact with each other.

8. The forceps device according to claim 7, wherein the fixing member includes an adhesive layer that bonds the cable and the portion of the wires to each other, the adhesive layer being formed along the outer periphery of the cable and the portion of the wires, and the fixing member and the adhesive layer being fixed in a state of close contact with each other.

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