CN115590601A

CN115590601A - High-frequency incision knife

Info

Publication number: CN115590601A
Application number: CN202110717076.6A
Authority: CN
Inventors: 熊小川; 章力; 王�锋
Original assignee: Shenzhen Meimeimeichuangyi Medical Technology Co ltd
Current assignee: Shenzhen Meimeimeichuangyi Medical Technology Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2023-01-13

Abstract

The invention discloses a high-frequency incision knife which comprises a first handle part, a second handle part, a cable, an outer tube and an operating part positioned at the end part of the cable, wherein the first handle part and the second handle part are detachably connected, one end of the outer tube is connected with the second handle part, and the operating part can be contained in the outer tube; the first handle part comprises a first handle, a pull ring and an electrode plug, the pull ring is connected with the first handle in a sliding mode, and the electrode plug is arranged in the pull ring; the cable passes through the second handle part, and two ends of the cable are respectively connected with the electrode plug and the operating part; the operation portion comprises a first electrode, a second electrode and a first insulation head, the first electrode is sleeved outside the second electrode, the second electrode penetrates through the first insulation head, and the second electrode is fixedly connected with the first insulation head. The high-frequency incision knife is provided with the plurality of electrodes and can be controlled respectively, and different electrodes are used for marking and cutting respectively, so that the instrument replacement in the operation is avoided, and the operation time and the operation risk are reduced.

Description

High-frequency incision knife

Technical Field

The invention relates to the technical field of medical instruments, in particular to a high-frequency incision knife.

Background

In recent years, with the development of endoscopic techniques, endoscopic tissue biopsy, endoscopic mucosal resection and endoscopic mucosal dissection have been widely applied, and play a key role in discovery, diagnosis and treatment of gastrointestinal hemorrhage, stenosis, polypectomy and early cancer of the digestive tract. Endoscopic Submucosa Dissection (ESD) is a new treatment means appearing in recent years, and the operation steps of Endoscopic submucosa dissection are as follows: marking, incision, submucosal dissection. The punctiform electrode can be got ready fast and mark and open the mucous membrane in the operation process, but when cutting, need set up insulating ceramic electrode tip at the electrode head end and insulate to accurate operation cuts unnecessary position when preventing to peel off the mucous membrane layer, causes perforation and hemorrhage. The requirements for marking and cutting are different, some endoscopes need to be used for operation respectively, and one cutting instrument is replaced after marking to cut. The time of the instrument replacement process is longer in the operation, which increases the operation time and the possible risk of scratching the endoscopic forceps channel. This procedure not only greatly increases the operation time, causes a longer period of pain to the patient and increases the treatment cost due to the use of multiple instruments in the operation, but also increases the risk of the operation.

Disclosure of Invention

The invention mainly solves the technical problem of providing a high-frequency incision knife which is provided with a plurality of electrodes, can be controlled respectively, can mark and cut respectively, does not need to replace instruments and avoids the defects.

In order to solve the technical problems, the invention adopts a technical scheme that: the high-frequency incision knife comprises a first handle part, a second handle part, a cable, an outer tube wrapping the cable and an operation part positioned at the end part of the cable, wherein the first handle part and the second handle part are detachably connected, one end of the outer tube is connected with the second handle part, and the operation part can be accommodated in the outer tube;

the first handle part comprises a first handle, a pull ring and an electrode plug, the pull ring is connected with the first handle in a sliding mode, and the electrode plug is arranged in the pull ring;

the cable penetrates through the second handle part, and two ends of the cable are respectively connected with the electrode plug and the operating part;

the operating part comprises a first electrode, a second electrode and a first insulating head, the first electrode is sleeved outside the second electrode, the second electrode penetrates through the first insulating head, and one end of the second electrode is fixedly connected with the first insulating head; the first handle part can drive the second electrode to stretch and retract, so that the second electrode is exposed or retracted from the first insulating head; the second handle part can drive the outer tube to stretch and retract, so that the first electrode is exposed out of or retracted into the outer tube.

The first electrode comprises a first tube body and a first head, wherein the first tube body is arranged along the axial direction of the cable and is hollow inside; the first head is arranged along the radial direction of the cable and is arranged on the side part of the first pipe body;

the second electrode comprises a second pipe body and a second head, the second pipe body is arranged along the axial direction of the cable, the second head is arranged along the radial direction of the cable, and the second head is arranged at one end of the second pipe body;

a through hole is formed in the first insulation head, the first tube body is inserted into the through hole, and the first head part abuts against the side wall of the first insulation head; the second electrode penetrates through the through hole; the diameter of the through hole is larger than the outer diameter of the second head part and smaller than the outer diameter of the first head part.

The operating part further comprises a connecting piece and a second insulating head, the two ends of the connecting piece are respectively connected with the cable and the second electrode, and the second insulating head is arranged in the outer tube and fixedly connected with the connecting piece.

The first handle is provided with a sliding groove in the axial direction, and the pull ring is installed in the sliding groove;

the pull ring is provided with an electrode plug groove, and the electrode plug is accommodated in the electrode plug groove;

the cable is inserted into the electrode plug groove and is fixedly connected with the electrode plug.

The second handle part comprises a second handle, a connecting buckle, a rotating terminal, a spring fixing part and a first elastic part, one end of the connecting buckle is sleeved outside the second handle, and the other end of the connecting buckle is fixedly connected with the first handle; one end of the rotary terminal is inserted into the second handle, and the other end of the rotary terminal is abutted against the first elastic piece; the spring fixing piece is fixedly connected with the first handle, and the first elastic piece is sleeved on the spring fixing piece;

the second handle is hollow, a convex shell is arranged at one end opposite to the rotating terminal, an inclined plane is formed at the end part of the shell, and a directional groove is formed in the side wall of the shell;

the inner wall of the connecting buckle is provided with a directional column in an axial extending manner along the connecting buckle, and the directional column is inserted into the directional groove;

the rotary terminal comprises an insertion part and an abutting part, the insertion part is inserted into the second handle, the abutting part is hollow, the first elastic piece is accommodated in the abutting part, the abutting part protrudes out of the outer wall of the insertion part to form an inclined plane, and a groove body is formed in the outer wall;

when the second handle moves towards the first elastic piece, the inclined surface applies force to the inclined surface, the rotating terminal is stressed to rotate, the directional column is separated from the groove body, the lower end of the directional column is abutted against the inclined surface, the second handle moves for a distance towards the first elastic piece, and the first elastic piece is compressed; when the second handle is continuously pressed, the inclined surface applies force to the inclined surface, the rotating terminal is stressed to rotate, the lower end of the orientation column is separated from the inclined surface and enters the groove body, and the first elastic piece releases elastic force to push the second handle to reset.

The end part of the connecting buckle is also provided with a step surface, the second handle part also comprises a second elastic part, the second elastic part is arranged between the outer surface of the second handle and the inner surface of the connecting buckle, and one end of the second elastic part is abutted against the step surface;

when the second handle moves towards the first elastic piece, the second elastic piece stretches, and when the second handle is continuously pressed, the second elastic piece releases the elastic force to pull the second handle to reset.

Wherein the cable is a steel cord.

The outer pipe comprises a plastic-coated spring pipe coated outside the cable, an outer sheath pipe sleeved outside the plastic-coated spring pipe and a sheath pipe sheath coated outside the outer sheath pipe.

The high-frequency incision knife further comprises an end cap, the sheath tube sheath and the end part of the outer sheath tube extend into the end cap from one side, the second handle is inserted into the other side of the end cap, so that the sheath tube sheath is abutted to the inner wall of the end cap, and the sheath tube sheath and the end part of the outer sheath tube are fixed in the end cap.

The second handle part also comprises a sheath pipe connector which is arranged in the second handle; a plug is formed at the front end of the second handle, is inserted into the sheath pipe sheath and is in interference fit with the inner wall of the sheath pipe sheath; one end of the outer sheath pipe is fixed in the sheath pipe connector.

Compared with the prior art, the high-frequency incision knife has the beneficial effects that: the electrode has a plurality of electrodes and can be controlled respectively, different electrodes are used for marking and cutting respectively, the instrument replacement in the operation is avoided, and the operation time and the operation risk are reduced.

Drawings

To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a high-frequency incision knife according to the present invention;

FIG. 2 is a cross-sectional view of the high frequency incision knife of the present invention;

FIG. 3 is a partial enlarged view of portion A of FIG. 2;

FIG. 4 is a partial enlarged view of portion B of FIG. 2;

FIG. 5 is a schematic view of a disassembled structure of a second handle portion;

FIG. 6 is a perspective view of the second handle;

FIG. 7 is a schematic view of the structure of the other side of the second handle;

FIG. 8 is a perspective view of the connection buckle;

fig. 9 is a perspective view of the rotary terminal;

fig. 10 is a schematic view of the structure of the other side of the rotary terminal;

fig. 11 is a schematic view of an initial state of the operation portion;

FIG. 12 is a schematic view of the second electrode as it extends;

FIG. 13 is a schematic view of the second electrode retracted and the first electrode exposed;

FIG. 14 is a schematic view of an initial position of the second handle portion;

FIG. 15 is a schematic view of the position after pressing the second handle;

FIG. 16 is a schematic view of the second handle in a limiting position;

fig. 17 is a schematic structural view of a second embodiment of the high-frequency incision knife of the present invention;

fig. 18 is a sectional view of the second embodiment of the high-frequency incision knife;

fig. 19 is a partially enlarged view of a portion C in fig. 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

All directional indicators (such as upper, lower, left, right, front, rear, 8230; etc.) in the embodiments of the present invention are only used to explain the relative positional relationship between the components at a certain posture (as shown in the drawing), the motion, etc., and if the certain posture is changed, the directional indicator is correspondingly changed. The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic view of a high-frequency incision knife according to the present invention, which includes a first handle portion 100, a second handle portion 200, a cable 300, an outer tube 400 covering the cable 300, and an operation portion 500 located at an end of the cable 300, wherein the first handle portion 100 and the second handle portion 200 are detachably connected, one end of the outer tube 400 is connected to the second handle portion 200, and the operation portion 500 can be accommodated in the outer tube 400. The first and

second handle portions

100 and 200 are used to manipulate the operating portion 500, the cable 300 is used to deliver electric current, the outer tube 400 is used to insulate the cable 300, and the operating portion 500 is used to perform a surgical operation, such as marking and cutting a lesion.

Referring to fig. 2, fig. 2 is a cross-sectional view of a high frequency incision knife, the first handle portion 100 includes a first handle 1, a pull ring 2, and an electrode plug 3, the pull ring 2 is slidably connected to the first handle 1, and the electrode plug 3 is disposed in the pull ring 2. The first handle 1 is used for being held by a hand of a user during operation, and the pull ring 2 is used for driving the operation part 500 to move through the cable 300, so that the operation part 500 is in an operation state or a non-operation state, and different operation states are switched. The electrode plug 3 is used to supply power to the high-frequency incision knife, so that the operation part 500 carries current to incise the focus of the human body.

The cable 300 passes through the second handle section 200, and both ends of the cable 300 are connected to the electrode plug 3 and the operating section 500, respectively. The cable 300 has the functions of transmitting current and transmitting pulling force to the operation part 500, and as the electrode plug 3 is fixed in the pull ring 2, the pull ring 2 drives the electrode plug 3 to move when sliding along the first handle 1, and the electrode plug 3 drives the cable 300 and the operation part 500 at the end part of the cable 300 to move, so that the operation part 500 switches the working state.

The operating portion 500 includes a first electrode 4, a second electrode 5 and a first insulating head 6, the first electrode 4 is sleeved outside the second electrode 5, the second electrode 5 passes through the first insulating head 6, and one end of the second electrode 5 is fixedly connected with the first insulating head 6. The first handle part 100 can drive the second electrode 5 to extend and retract, so that the second electrode 5 is exposed or retracted from the first insulating head 6; the second handle portion 200 can cause the outer tube 400 to telescope, thereby exposing or retracting the first electrode 4 from within the outer tube 400. The operation unit 500 in this embodiment is provided with two electrodes for marking and cutting, respectively, and has two functions at the same time, thereby avoiding the need to replace instruments during the operation. The first insulating head 6 is made of an insulating material, such as a ceramic material, and is used for insulation when the first electrode 4 is used. Specifically, referring to fig. 11 to 13, the first electrode 4 is used for cutting, and the second electrode 5 is used for dotting. When needs mark, first handle portion 100 drives second electrode 5 and stretches out from first insulation head 6 in, utilizes the tip to beat, can be more accurate mark out the focus that needs the cutting, distinguishes with healthy position, and the back of finishing marking, first handle portion 100 drives second electrode 5 and retracts into first insulation head 6, avoids when the cutting operation improper causing the accident. When the cutting is needed, the second handle part 200 drives the outer tube 400 to retract, the first electrode 4 and the first insulating head 6 are exposed out of the end part of the outer tube 400, the first insulating head 6 is located at the end part of the first electrode 4 at the moment, the second electrode 5 retracts into the first insulating head 6, the focus can be cut by utilizing the side part of the first electrode 4, and the first insulating head 6 with the front end is insulated, so that when the marked focus is cut, the damage to a patient caused by misoperation can be avoided to a greater extent. After the cutting, the second handle portion 200 drives the outer tube 400 to extend, and the first electrode 4 is accommodated in the outer tube 400.

The high-frequency incision knife in the embodiment has dotting marking and cutting functions, different electrodes are alternately used for operation during marking and cutting, instrument replacement in an operation is avoided, and operation time and operation risks are reduced.

The first electrode 4 in this embodiment includes a first tube 41 and a first head 42, and the first tube 41 is disposed along the axial direction of the cable 300 and is hollow to facilitate the second electrode 5 to pass through. The first header 42 is disposed along a radial direction of the cable 300, perpendicular to the first tube 41, and the first header 42 is disposed at a side portion of the first tube 41.

The second electrode 5 includes a second tube 51 and a second header 52, the second tube 51 is disposed along an axial direction of the cable 300, the second header 52 is disposed along a radial direction of the cable 300, the second header 52 is perpendicular to the second tube 51, and the second header 52 is disposed at one end of the second tube 51.

The shape of the first head 42 and the second head 52 may be various, such as a trapezoid shape, a semi-sphere shape or a flat plate shape, in order to facilitate the function of the first electrode 4 and the second electrode 5, in this embodiment, the shape of the first head 42 is configured as a flat plate shape, so as to facilitate the attachment and fixation with the first insulation head 6. The second head 52 is shaped like a hemisphere, so that when the second electrode 5 is used for dotting marking, the small size of the end of the second head 52 can be conveniently used for contacting with a human body, and the operation is more accurate.

A through hole 61 is formed in the first insulation head 6, the front end of the first tube 41 is inserted into the through hole 61, the first head 42 abuts against the side wall of the first insulation head 6, and the first electrode 4 can be fixed to the first insulation head 6 by welding or bonding. The second electrode 5 passes through the through hole 61 and the first electrode 4, and the diameter of the through hole 61 is larger than the outer diameter of the second head 52 and smaller than the outer diameter of the first head 42, so that the second electrode 5 can be retracted into the first insulation head 6.

In this embodiment, the first electrode 4 and the second electrode 5 are independently disposed and controlled by the second handle portion 200 and the first handle portion 100, respectively. When the first handle 100 is pushed, the cable 300 is driven to move, so that the second electrode 5 fixed at one end of the cable 300 extends out of the first insulation head 6, and when the first handle 100 is pulled, the second electrode 5 retracts into the first insulation head 6. The second handle portion 200 drives the outer tube 400 to extend and retract, so that the outer tube 400 and the first electrode 4 located in the outer tube 400 form a relative motion, and the first electrode 4 is exposed from or retracted into the outer tube 400. Through the arrangement, different use requirements during the endoscopic submucosal dissection can be met.

The operation portion 500 in this embodiment further includes a connecting member 7 and a second insulating head 8, two ends of the connecting member 7 are respectively connected to the cable 300 and the second electrode 5, and the second insulating head 8 is disposed in the outer tube 400 and is fixedly connected to the connecting member 7. The connecting piece 7 is also arranged in the outer tube 400 and welded with the second insulating head 8. The second insulating head 8 is made of an insulating material, such as ceramic, and is used for isolating the second electrode 5 from the outer tube 400. The connecting member 7 is used for connecting the second electrode 5 and the cable 300, so that the second electrode 5 is driven by the cable 300 to move.

Referring to fig. 5, fig. 5 is a schematic view of the second handle portion in a disassembled structure. The first handle 1 in this embodiment is provided with a sliding groove 11 in the axial direction, and the pull ring 2 is installed in the sliding groove 11. The pull ring 2 is provided with an electrode plug groove 21, and the electrode plug 3 is received in the electrode plug groove 21. The cable 300 is inserted into the electrode plug slot 21 and fixedly connected with the electrode plug 3, so that when the pull ring 2 slides, the cable 300 and the second electrode 5 can be driven to extend and retract, and the electrode plug 3 transmits current to the second electrode 5 through the cable 300.

The second handle portion 200 in this embodiment includes a second handle 9, a connecting buckle 10, a rotating terminal 12, a spring fixing member 13 and a first elastic member 14, wherein one end of the connecting buckle 10 is sleeved outside the second handle 9, and the other end is fixedly connected with the first handle 1; one end of the rotary terminal 12 is inserted into the second handle 9, and the other end abuts against the first elastic member 14; the spring fixing member 13 is fixedly connected with the first handle 1, and the first elastic member 14 is sleeved on the spring fixing member 13. The second handle portion 200 is operative to move the outer tube 400 in relation to the first electrode 4.

Specifically, the second handle 9 is hollow, a protruding housing 91 is disposed at an end opposite to the rotary terminal 12, an inclined surface 92 is formed at an end of the housing 91, and a directional groove 93 is disposed on a side wall of the housing 91, please refer to fig. 6 and 7. The inner wall of the connecting buckle 10 is provided with an orientation post 101 extending along the axial direction of the connecting buckle 10, and referring to fig. 8, the orientation post 101 is inserted into the orientation groove 93. Referring to fig. 9 and 10, the rotary terminal 12 includes an insertion portion 121 and an abutting portion 122, the insertion portion 121 is inserted into the second handle 9, the abutting portion 122 is hollow, the first elastic element 14 is accommodated in the abutting portion 122, the abutting portion 122 protrudes from an outer wall of the insertion portion 121 to form an inclined surface 123, and an outer wall of the abutting portion 122 is provided with a slot 124.

For ease of understanding, the direction of movement of the second handle 9 closer to the first handle 1 is taken as the right direction and the direction of movement of the second handle 9 further from the first handle 1 is taken as the left direction. Referring to fig. 14 to 16, in the initial state, the orientation post 101 is located in the orientation groove 93 and the slot 124, when the second handle 9 moves rightward, the inclined surface 92 applies a force to the inclined surface 123, the rotary terminal 12 is forced to move rightward and rotate at the same time, the orientation post 101 is separated from the slot 124, the lower end of the orientation post 101 abuts against the protrusion of the inclined surface 123, the position of the second handle 9 is limited, and at this time, the second handle 9 moves rightward by a distance from the initial state, and the first elastic element 14 is compressed. When the second handle 9 is pressed again, the inclined surface 92 applies force to the inclined surface 123, the rotating terminal 12 is forced to move rightwards and rotate at the same time, the lower end of the orientation column 101 goes over the protruding part, is separated from the inclined surface 123, enters the groove body 124 rightwards, and at the moment, the first elastic piece 14 releases elastic force and pushes the second handle 9 to move leftwards and reset. During the left and right movement of the second handle 9, the second handle 9 is connected to the outer tube 400, so that the outer tube 400 is driven to extend and retract, and the first electrode 4 is exposed or retracted from the outer tube 400.

The end of the connecting buckle 10 in this embodiment is further provided with a step surface 102, the second handle portion 200 further comprises a second elastic element 15, the second elastic element 15 is arranged between the outer surface of the second handle 9 and the inner surface of the connecting buckle 10, and one end of the second elastic element is abutted against the step surface 102. When the second handle 9 is moved to the right, the second elastic member 15 is stretched, and when the second handle 9 is pressed for the second time, the second elastic member 15 releases its elastic force, and cooperates with the first elastic member 14 to return the second handle 9 to the original position in the left direction.

Preferably, the first elastic member 14 and the second elastic member 15 are both springs.

The cable 300 in this embodiment is a steel cord, and the cable 300 needs to have both functions of transmitting current and transmitting tension, and therefore, the steel cord is selected as the cable 300 in this application because the cable 300 needs to have conductivity and certain rigidity.

The outer tube 400 in this embodiment includes a plastic-coated spring tube 16 covering the exterior of the cable 300, an outer sheath tube 17 covering the plastic-coated spring tube 16, and a sheath 18 covering the exterior of the outer sheath tube 17. The end of the plastic-coated spring tube 16 is fixed in the spring fixing member 13 and used for insulating the outside of the cable 300 and preventing electric leakage, the outer sheath tube 17 is used for protecting the plastic-coated spring tube 16 and the cable 300 inside, and the sheath tube sheath 18 has certain rigidity and hardness and is used for preventing the plastic-coated spring tube 16, the outer sheath tube 17 and the cable 300 in the high-frequency incision knife from being excessively bent, which is not beneficial to adjusting the direction of the operation part 500 in the using process. The sheath 18 is shorter than the plastic-coated spring tube 16 and the outer sheath 17, and extends out of the second handle portion 200 to avoid affecting the bending of the inner tube.

The outer tube 400 is connected to the second handle portion 200 in various ways, wherein the high-frequency incision knife in one embodiment further includes an end cap 19, as shown in fig. 2, the end cap 19 is hollow, one end of the end cap is open, the ends of the sheath 18 and the outer sheath 17 extend into the end cap 19 from one side, the second handle 9 is inserted from the other side of the end cap 19, and the sheath 18 and the outer sheath 17 are pressed, so that the sheath 18 abuts against the inner wall of the end cap 19, and the ends of the sheath 18 and the outer sheath 17 are fixed in the end cap 19.

In the second embodiment of the high-frequency incision knife, referring to fig. 18 and 19, the second handle portion 200 further includes a sheath connector 20 therein, and the sheath connector 20 is mounted in the second handle 9. The front end of the second handle 9 forms a plug 94, and the plug 94 is inserted into the sheath 18 and is in interference fit with the inner wall of the sheath 18, so that the second handle 9 and the sheath 18 are fixedly connected. Of course, it is also possible to bond or weld the second handle 9 to the sheath 18. One end of the sheath 17 is fixed in the sheath connector 20, and the sheath 17 is connected to the second handle 9. In this embodiment, compared to the first embodiment, the end cap 19 and the second elastic member 15 are eliminated, and the sheath connector 20 is used for fixing, and since the sheath connector 20 is provided in the second handle 9, there is no space in the second handle 9 for accommodating the second elastic member 15, so that the second elastic member 15 is eliminated in this embodiment.

The high-frequency incision knife is provided with a plurality of electrodes which can be controlled respectively, and different electrodes are used for marking and cutting respectively, so that the instrument replacement in the operation is avoided, and the operation time and the operation risk are reduced.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The high-frequency incision knife is characterized by comprising a first handle part, a second handle part, a cable, an outer tube covering the cable and an operating part positioned at the end part of the cable, wherein the first handle part and the second handle part are detachably connected, one end of the outer tube is connected with the second handle part, and the operating part can be accommodated in the outer tube;

the first handle part comprises a first handle, a pull ring and an electrode plug, the pull ring is connected with the first handle in a sliding manner, and the electrode plug is arranged in the pull ring;

2. The high-frequency incision knife according to claim 1, wherein the first electrode comprises a first tube and a first head, the first tube being disposed in an axial direction of the cable and having a hollow interior; the first head is arranged along the radial direction of the cable and is arranged on the side part of the first pipe body;

3. The high-frequency incision knife according to claim 2, wherein the operation portion further comprises a connecting member and a second insulating head, both ends of the connecting member are respectively connected to the cable and the second electrode, and the second insulating head is disposed in the outer tube and is fixedly connected to the connecting member.

4. The high-frequency incision knife according to claim 1, wherein said first handle is provided with a sliding groove in an axial direction, and said pull ring is fitted in said sliding groove;

the pull ring is provided with an electrode plug slot, and the electrode plug is accommodated in the electrode plug slot;

5. The high-frequency incision knife according to claim 2, wherein the second handle portion comprises a second handle, a connecting buckle, a rotary terminal, a spring fixing member and a first elastic member, one end of the connecting buckle is sleeved outside the second handle, and the other end of the connecting buckle is fixedly connected with the first handle; one end of the rotary terminal is inserted into the second handle, and the other end of the rotary terminal is abutted against the first elastic piece; the spring fixing piece is fixedly connected with the first handle, and the first elastic piece is sleeved on the spring fixing piece;

when the second handle moves towards the first elastic piece, the inclined surface applies force to the inclined surface, the rotating terminal is stressed to rotate, the directional column is separated from the groove body, the lower end of the directional column is abutted against the inclined surface, the second handle moves for a distance towards the first elastic piece, and the first elastic piece is compressed; when the second handle is continuously pressed, the inclined surface applies force to the inclined surface, the rotary terminal is stressed to rotate, the lower end of the orientation column is separated from the inclined surface and enters the groove body, and the first elastic piece releases elastic force to push the second handle to reset.

6. The high-frequency incision knife according to claim 5, wherein the end of the connecting buckle is further provided with a step surface, the second handle portion further comprises a second elastic member, the second elastic member is arranged between the outer surface of the second handle and the inner surface of the connecting buckle, and one end of the second elastic member abuts against the step surface;

7. The high-frequency slitting knife according to claim 1, wherein the cable is a steel cord.

8. The high-frequency incision knife according to claim 5, wherein the outer tube comprises a plastic-coated spring tube covering the outside of the cable, an outer sheath tube covering the plastic-coated spring tube, and a sheath tube sheath covering the outside of the outer sheath tube.

9. The high-frequency incision knife according to claim 8, further comprising an end cap into which the ends of the sheath and the outer sheath extend from one side, wherein the second handle is inserted into the other side of the end cap so that the sheath is abutted against the inner wall of the end cap, and wherein the ends of the sheath and the outer sheath are fixed in the end cap.

10. The high frequency incision knife of claim 8, wherein the second handle portion further comprises a sheath connector disposed within the second handle; a plug is formed at the front end of the second handle, is inserted into the sheath pipe sheath and is in interference fit with the inner wall of the sheath pipe sheath; one end of the outer sheath tube is fixed in the sheath tube connector.