High frequency incision knife

Abstract

The application 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 at the end of the cable, 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 slidably connected with the first handle, and the electrode plug is arranged in the pull ring; the cable passes through the second handle part and is connected with the electrode plug and the operating part at two ends respectively; the operating part comprises a first electrode, a second electrode and a first insulation head, the first electrode is sleeved outside the second electrode, the second electrode passes through the first insulation head, and the second electrode is fixedly connected with the first insulation head. The high-frequency incision knife has multiple electrodes and can be controlled respectively, different electrodes are used for marking and cutting respectively, the instrument is not needed to be replaced in the operation, and the operation time and operation risk are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a high-frequency incision knife. BACKGROUND

[0002] In recent years, with the development of endoscopic technology, endoscopic biopsy, endoscopic mucosal resection and endoscopic mucosal dissection have been widely used, which plays a key role in the discovery, diagnosis and treatment of gastrointestinal bleeding, stenosis, polyp resection and early cancer of the digestive tract. Endoscopic submucosal dissection (ESD) is a new treatment method that has emerged in recent years. The operation steps of endoscopic submucosal dissection are marking, incision and submucosal dissection. In the operation process, the point electrode can quickly mark and incise the mucosa, but when cutting, an insulating ceramic electrode head needs to be set at the end of the electrode to insulate and accurately operate, preventing the mucosal layer from being cut in unnecessary parts during dissection, causing perforation and bleeding. The requirements for marking and cutting are different, and some need to use two different endoscopes to operate, first mark and then replace another cutting instrument to cut. The time of intraoperative instrument replacement is relatively long, which increases the operation time and the risk of endoscope channel being scratched. This process not only greatly increases the operation time, brings longer pain to the patient and increases the treatment cost due to the use of multiple instruments during the operation, but also increases the risk of the operation. SUMMARY

[0003] The technical problem solved by the present application is to provide a high-frequency incision knife with multiple electrodes that can be controlled separately, allowing marking and cutting separately without the need to replace instruments, thereby avoiding the above-mentioned shortcomings.

[0004] To solve the above technical problems, one technical solution adopted by the present application is to provide a high-frequency incision knife, which comprises a first handle part, a second handle part, a cable, an outer tube covering the outside of the cable, and an operating part located at the end of the cable. The first handle part and the second handle part are detachably connected. One end of the outer tube is connected to the second handle part, and the operating part can be accommodated in the outer tube.

[0005] The first handle part comprises a first handle, a pull ring and an electrode plug. The pull ring is in sliding connection with the first handle, and the electrode plug is arranged in the pull ring.

[0006] The cable passes through the second handle part and is connected to the electrode plug and the operating part at both ends, respectively.

[0007] The operation part comprises a first electrode, a second electrode and a first insulation head, the first electrode is sleeved outside the second electrode, the second electrode passes through the first insulation head, and one end of the second electrode is fixedly connected with the first insulation head; the first handle part can drive the second electrode to stretch out or retract, so that the second electrode is exposed or retracted from the first insulation head; the second handle part can drive the outer tube to stretch out or retract, so that the first electrode is exposed or retracted from the outer tube.

[0008] The first electrode comprises a first tube body and a first head, the first tube body is arranged along the axial direction of the cable and is internally hollow, and the first head is arranged along the radial direction of the cable and is arranged at the side of the first tube body;

[0009] The second electrode comprises a second tube body and a second head, the second tube body is arranged along the axial direction of the cable, and the second head is arranged along the radial direction of the cable and is arranged at one end of the second tube body;

[0010] The first insulation head is internally provided with a through hole, the first tube body is inserted into the through hole, and the first head abuts against the side wall of the first insulation head; the second electrode passes through the through hole; the diameter of the through hole is greater than the outer diameter of the second head and smaller than the outer diameter of the first head.

[0011] The operation part further comprises a connecting piece and a second insulation head, the two ends of the connecting piece are connected with the cable and the second electrode respectively, and the second insulation head is arranged in the outer tube and is fixedly connected with the connecting piece.

[0012] The first handle is provided with a sliding groove in the axial direction, and the pull ring is installed in the sliding groove;

[0013] The pull ring is provided with an electrode plug groove, and the electrode plug is accommodated in the electrode plug groove;

[0014] The cable is inserted into the electrode plug groove and is fixedly connected with the electrode plug.

[0015] The second handle part comprises a second handle, a connecting buckle, a rotating terminal, a spring fixing piece and a first elastic piece, one end of the connecting buckle is sleeved outside the second handle, and the other end is fixedly connected with the first handle; one end of the rotating terminal is inserted into the second handle, and the other end abuts 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;

[0016] The second handle is hollow, one end of the second handle opposite to the rotating terminal is provided with a protruding shell, an inclined surface is formed at the end of the shell, and a directional groove is formed in the side wall.

[0017] The inner wall of the connecting buckle is provided with a directional column extending axially along the connecting buckle, which is inserted into the directional slot;

[0018] The rotating terminal comprises an insertion part and an abutting part, the insertion part is inserted into the second handle, the inside of the abutting part is hollow, the first elastic member is contained in the abutting part, the abutting part protrudes from the outer wall of the insertion part to form an inclined surface, and a groove is formed on the outer wall;

[0019] When the second handle moves towards the first elastic member, the inclined surface applies force to the inclined surface, the rotating terminal rotates under the force, the directional column is separated from the groove, the lower end of the directional column abuts against the inclined surface, the second handle moves towards the first elastic member by a distance, and the first elastic member is compressed; when the second handle is continuously pressed, the inclined surface applies force to the inclined surface, the rotating terminal rotates under the force, the lower end of the directional column is separated from the inclined surface and enters the groove, the first elastic member releases the elastic force and pushes the second handle to reset.

[0020] The end of the connecting buckle is further provided with a stepped surface, the second handle part 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 stepped surface;

[0021] When the second handle moves towards the first elastic member, the second elastic member is stretched, and when the second handle is continuously pressed, the second elastic member releases the elastic force and pulls the second handle to reset.

[0022] The cable is a steel rope.

[0023] The outer tube comprises a plastic-coated spring tube wrapped outside the cable, an outer sheath tube sleeved outside the plastic-coated spring tube, and a sheath tube sheath wrapped outside the outer sheath tube.

[0024] The high-frequency incision knife further comprises an end cap, the end of the sheath tube sheath and the outer sheath tube extends 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 abuts against the inner wall of the end cap, and the end of the sheath tube sheath and the outer sheath tube is fixed in the end cap.

[0025] The second handle part further comprises a sheath tube connector, which is arranged in the second handle; the front end of the second handle forms a plug, which is inserted into the sheath tube sheath and is in interference fit with the inner wall of the sheath tube sheath; and one end of the outer sheath tube is fixed in the sheath tube connector.

[0026] Compared with the prior art, the high-frequency incision knife has the advantages that multiple electrodes can be controlled respectively, marking and cutting are respectively performed by using different electrodes, replacement of instruments in surgery is avoided, and surgery time and surgery risk are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0028] Figure 1 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0029] Figure 2 is a sectional view of the high-frequency incision knife of the present application;

[0030] Figure 3 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application; Figure 2

[0031] Figure 4 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application; Figure 2

[0032] Figure 5 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0033] Figure 6 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0034] Figure 7 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0035] Figure 8 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0036] Figure 9 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0037] Figure 10 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0038] Figure 11 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0039] Figure 12 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0040] Figure 13 is a schematic view of a three-dimensional structure of the high-frequency incision knife of the present application;

[0041] Figure 14 ​​is the initial position schematic view of the second handle part;

[0042] Figure 15 is the position schematic view after pressing the second handle;

[0043] Figure 16 is the schematic view of the second handle in the limiting state;

[0044] Figure 17 is the structure schematic view of the second embodiment of the high-frequency incision knife;

[0045] Figure 18 is the sectional view of the second embodiment of the high-frequency incision knife;

[0046] Figure 19 is Figure 18 is the local enlarged view of the middle C part. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] All directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly. The terms “first”, “second”, etc. in the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0049] In this document, reference 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 they necessarily mutually exclusive or alternative embodiments. It is explicitly contemplated that embodiments described herein can be combined with other embodiments.

[0050] Please refer to Figure 1 , Figure 1is a schematic view of the high-frequency incision knife of the present application, the high-frequency incision knife comprises a first handle part 100, a second handle part 200, a cable 300, an outer tube 400 covering the outside of the cable 300, and an operating part 500 at the end of the cable 300, the first handle part 100 and the second handle part 200 are detachably connected, one end of the outer tube 400 is connected with the second handle part 200, and the operating part 500 can be accommodated in the outer tube 400. The first handle part 100 and the second handle part 200 are used to control the operating part 500, the cable 300 is used to transmit current, the outer tube 400 is used to isolate the cable 300, and the operating part 500 is used to perform surgical operations, such as marking and cutting lesions.

[0051] Please refer to Figure 2 , Figure 2 is a sectional view of the high-frequency incision knife, the first handle part 100 comprises a first handle 1, a pull ring 2, and an electrode plug 3, the pull ring 2 is in sliding connection with the first handle 1, and the electrode plug 3 is arranged in the pull ring 2. The first handle 1 is used for the user to hold when operating, the pull ring 2 is used to drive the operating part 500 to move through the cable 300, so that the operating part 500 enters a working or non-working state, and different working states are switched. The electrode plug 3 is used to provide power for the high-frequency incision knife, so that the operating part 500 has current, and lesions of the human body are cut.

[0052] The cable 300 passes through the second handle part 200, and two ends of the cable 300 are connected with the electrode plug 3 and the operating part 500 respectively. The cable 300 has the functions of transmitting current and transmitting tension to the operating part 500. Since the electrode plug 3 is fixed in the pull ring 2, when the pull ring 2 slides along the first handle 1, the electrode plug 3 is driven to move, and the electrode plug 3 drives the cable 300 and the operating part 500 at the end of the cable 300 to move, so that the operating part 500 switches the working state.

[0053] The operating part 500 comprises 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 stretch and retract, so that the second electrode 5 is exposed or retracted from the first insulating head 6; the second handle part 200 can drive the outer tube 400 to stretch and retract, so that the first electrode 4 is exposed or retracted from the outer tube 400. The operating part 500 in the embodiment is provided with two electrodes, which are respectively used for marking and cutting, and simultaneously have two functions, so that the instruments are not replaced in 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. For details, please refer to Figures 11 to 13The first electrode 4 in the embodiment is used for cutting, and the second electrode 5 is used for marking. When marking is needed, the first handle 100 drives the second electrode 5 to extend from the first insulation head 6, and the end portion is used for marking, so that the lesion to be cut can be marked more accurately and distinguished from the healthy part. After marking, the first handle 100 drives the second electrode 5 to retract into the first insulation head 6, so as to avoid accidents caused by improper operation during cutting. When cutting is needed, the second handle 200 drives the outer tube 400 to retract, and the first electrode 4 and the first insulation head 6 extend from the end portion of the outer tube 400. At this time, the first insulation head 6 is located at the end portion of the first electrode 4, and the second electrode 5 retracts into the first insulation head 6. The lesion can be cut by using the side portion of the first electrode 4. Since the first insulation head 6 at the front end is used for insulation, when the marked lesion is cut, the harm to the patient caused by improper operation can be avoided to a large extent. After cutting, the second handle 200 drives the outer tube 400 to extend, and the first electrode 4 is accommodated in the outer tube 400.

[0054] The above arrangement can make the high-frequency cutting knife in the embodiment have the functions of marking and cutting at the same time. Different electrodes are used for operation during marking and cutting, so that the instruments are not replaced during the operation, and the operation time and operation risk are reduced.

[0055] The first electrode 4 in the embodiment includes a first tube body 41 and a first head 42. The first tube body 41 is arranged along the axial direction of the cable 300 and is hollow, so that the second electrode 5 can pass through the first tube body 41. The first head 42 is arranged along the radial direction of the cable 300 and is perpendicular to the first tube body 41. The first head 42 is arranged at the side portion of the first tube body 41.

[0056] The second electrode 5 includes a second tube body 51 and a second head 52. The second tube body 51 is arranged along the axial direction of the cable 300, and the second head 52 is arranged along the radial direction of the cable 300. The second head 52 is perpendicular to the second tube body 51, and the second head 52 is arranged at one end of the second tube body 51.

[0057] The shapes of the first head 42 and the second head 52 can be various, such as trapezoidal shape, semispherical shape or flat plate shape. In order to realize the functions of the first electrode 4 and the second electrode 5, the shape of the first head 42 is set to flat plate shape in the embodiment, so as to be fixed by being matched with the first insulation head 6. The shape of the second head 52 is set to semispherical shape, so that the end portion of the second head 52 with small volume is used for contacting the human body when the second electrode 5 is used for marking, and the operation of the surgery is more accurate.

[0058] The first insulating head 6 is provided with a through hole 61, the front end of the first tube body 41 is inserted into the through hole 61, the first head 42 abuts against the side wall of the first insulating head 6, and the first electrode 4 can be fixed between the first insulating head 6 by welding or bonding. The second electrode 5 passes through the through hole 61 and the first electrode 4, the diameter of the through hole 61 is greater than the outer diameter of the second head 52 and less than the outer diameter of the first head 42, so that the second electrode 5 can be retracted into the first insulating head 6.

[0059] In the embodiment, the first electrode 4 and the second electrode 5 are independently arranged and controlled by the second handle 200 and the first handle 100 respectively. When the first handle 100 is pushed, the cable 300 is driven to move, so that the second electrode 5 fixed to one end of the cable 300 is extended from the first insulating head 6, and when the first handle 100 is pulled, the second electrode 5 is retracted into the first insulating head 6. The second handle 200 drives the outer tube 400 to extend or retract, so that the first electrode 4 in the outer tube 400 moves relative to the outer tube 400, and the first electrode 4 is exposed or retracted from the outer tube 400. Through the above arrangement, different use requirements during endoscopic submucosal dissection can be met.

[0060] The operation part 500 in the embodiment further includes a connecting piece 7 and a second insulating head 8, the two ends of the connecting piece 7 are connected with the cable 300 and the second electrode 5 respectively, the second insulating head 8 is arranged in the outer tube 400 and fixedly connected with the connecting piece 7. The connecting piece 7 is also arranged in the outer tube 400 and welded between the second insulating head 8. The second insulating head 8 is made of insulating material, for example, ceramic, which is used to isolate the second electrode 5 and prevent electric leakage from the outer tube 400. The connecting piece 7 is used to connect the second electrode 5 and the cable 300, so that the second electrode 5 is driven to move by the cable 300.

[0061] Please refer to Figure 5 , Figure 5 is a split structure schematic view of the second handle. In the embodiment, the first handle 1 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 accommodated in the electrode plug groove 21. The cable 300 is inserted into the electrode plug groove 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 or retract, and the electrode plug 3 also transmits current to the second electrode 5 through the cable 300.

[0062] The second handle part 200 in the embodiment comprises a second handle 9, a connecting buckle 10, a rotating terminal 12, a spring fixing part 13 and a first elastic part 14. 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 rotating terminal 12 is inserted into the second handle 9, and the other end is in abutment with the first elastic part 14. The spring fixing part 13 is fixedly connected with the first handle 1, and the first elastic part 14 is sleeved on the spring fixing part 13. The second handle part 200 is used to drive the relative movement of the outer tube 400 and the first electrode 4.

[0063] Specifically, the second handle 9 is hollow, and the end opposite to the rotating terminal 12 is provided with a protruding shell 91. The end of the shell 91 forms an inclined surface 92, and a directional groove 93 is formed in the side wall. Please refer to Figure 6 and Figure 7 . A directional column 101 is arranged on the inner wall of the connecting buckle 10 along the axial direction of the connecting buckle 10. Please refer to Figure 8 . The directional column 101 is inserted into the directional groove 93. Please refer to Figure 9 and Figure 10 . The rotating terminal 12 comprises an insertion part 121 and an abutment part 122. The insertion part 121 is inserted into the second handle 9, the inside of the abutment part 122 is hollow, the first elastic part 14 is contained in the abutment part 122, the inclined surface 123 is formed on the outer wall of the abutment part 122 which protrudes from the insertion part 121, and a groove 124 is formed in the outer wall of the abutment part 122.

[0064] For the convenience of understanding, the movement direction of the second handle 9 close to the first handle 1 is regarded as the right direction, and the movement direction of the second handle 9 away from the first handle 1 is regarded as the left direction. Please refer to Figures 14 to 16 . The initial state is that the directional column 101 is in the directional groove 93 and the groove 124. When the second handle 9 moves to the right, the inclined surface 92 exerts force on the inclined surface 123, the rotating terminal 12 is forced to move and rotate to the right at the same time, the directional column 101 is separated from the groove 124, the lower end of the directional column 101 abuts against the protruding part of the inclined surface 123, and the position of the second handle 9 is limited. At this time, the second handle 9 moves to the right by a distance compared with the initial state, and the first elastic part 14 is compressed. When the second handle 9 is pressed again, the inclined surface 92 exerts force on the inclined surface 123, the rotating terminal 12 is forced to move and rotate to the right at the same time, the lower end of the directional column 101 passes the protruding part and is separated from the inclined surface 123, and enters the groove 124 to the right. At this time, the first elastic part 14 releases the elastic force and pushes the second handle 9 to move to the left to reset. In the process of the left and right movement of the second handle 9, since the second handle 9 is connected with the outer tube 400, the outer tube 400 is stretched and contracted to make the first electrode 4 exposed from or retracted into the outer tube 400.

[0065] The end of the connecting buckle 10 in the embodiment further has a stepped surface 102, and the second handle part 200 further comprises a second elastic member 15, which is arranged between the outer surface of the second handle 9 and the inner surface of the connecting buckle 10 and abuts against the stepped surface 102 at one end. When the second handle 9 moves in the right direction, the second elastic member 15 is stretched, and when the second handle 9 is pressed again, the second elastic member 15 releases the elastic force and cooperates with the first elastic member 14 to rebound the second handle 9 in the left direction to the original position.

[0066] Preferably, the first elastic member 14 and the second elastic member 15 are both springs.

[0067] The cable 300 in the embodiment is a steel rope. Since the cable 300 needs to have the dual functions of transmitting current and transmitting tension, it needs to have conductivity and certain rigidity, and therefore a steel rope is selected as the cable 300 in the application.

[0068] The outer tube 400 in the embodiment comprises a plastic-coated spring tube 16 wrapped outside the cable 300, an outer sheath tube 17 sleeved outside the plastic-coated spring tube 16, and a sheath tube sheath 18 wrapped outside the outer sheath tube 17. The end of the plastic-coated spring tube 16 is fixed in the spring fixing member 13 for insulating the outside of the cable 300 to prevent electric leakage, the outer sheath tube 17 is used for protecting the internal plastic-coated spring tube 16 and the cable 300, 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 cutting knife from being excessively bent, which is not conducive to adjusting the direction of the operation part 500 in the use process. The length of the sheath tube sheath 18 is less than the lengths of the plastic-coated spring tube 16 and the outer sheath tube 17, and only a segment of the second handle part 200 is extended, so as to avoid affecting the bending of the internal tubes.

[0069] The connection mode of the outer tube 400 and the second handle part 200 has various modes, and the high-frequency cutting knife in one embodiment further comprises an end cap 19, please refer to Figure 2 The end cap 19 is hollow inside, one end forms an opening, and the ends of the sheath tube sheath 18 and the outer sheath tube 17 extend into the end cap 19 from one side, and the second handle 9 is inserted from the other side of the end cap 19 to extrude the sheath tube sheath 18 and the outer sheath tube 17, so that the sheath tube sheath 18 abuts against the inner wall of the end cap 19 to fix the ends of the sheath tube sheath 18 and the outer sheath tube 17 in the end cap 19.

[0070] In the second embodiment of the high-frequency cutting knife, please refer to Figure 18 and Figure 19The second handle 9 is provided with a sheath connecting head 20. The sheath connecting head 20 is fixed in the second handle 9. The front end of the second handle 9 is provided with a plug 94. The plug 94 is inserted into the sheath sleeve 18 and is in interference fit with the inner wall of the sheath sleeve 18, so that the second handle 9 is fixedly connected with the sheath sleeve 18. Of course, the second handle 9 and the sheath sleeve 18 can also be bonded or welded. One end of the outer sheath 17 is fixed in the sheath connecting head 20, so that the outer sheath 17 is connected with the second handle 9. In this embodiment, the end cap 19 and the second elastic member 15 are cancelled compared with the first embodiment, and the sheath connecting head 20 is used for fixation. Since the sheath connecting head 20 is arranged in the second handle 9, there is no space in the second handle 9 to accommodate the second elastic member 15, so the second elastic member 15 is cancelled in this embodiment.

[0071] The high-frequency incision knife of the present application has multiple electrodes and can be controlled respectively. Different electrodes are used for marking and cutting respectively, which avoids replacing instruments in surgery, reduces the operation time and the risk of surgery.

[0072] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the specification and drawings of the present application, is also included in the patent protection scope of the present application.

Claims

1. A high frequency dissecting knife characterized by comprising: The high-frequency incision knife comprises a first handle part, a second handle part, a cable, an outer tube covering the cable, and an operation part at the end of the cable, 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 in sliding connection with the first handle, and the electrode plug is arranged in the pull ring; The cable passes through the second handle part, and two ends thereof are connected with the electrode plug and the operation part respectively; The operation part comprises a first electrode, a second electrode, and a first insulation head, the first electrode is sleeved outside the second electrode, the second electrode passes through the first insulation head, and one end of the second electrode is fixedly connected with the first insulation 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 insulation head; and the second handle part can drive the outer tube to stretch and retract, so that the first electrode is exposed or retracted from the outer tube; 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 is fixedly connected with the first handle; one end of the rotating terminal is inserted into the second handle, and the other end is in abutment with the first elastic part; the spring fixing part is fixedly connected with the first handle, and the first elastic part is sleeved on the spring fixing part; The second handle is hollow, one end opposite to the rotating terminal is provided with a convex shell, an end of the shell forms an inclined surface, and a directional groove is formed in the side wall; a directional column is arranged on the inner wall of the connecting buckle in the axial direction of the connecting buckle, and the directional column is inserted into the directional groove; the rotating terminal comprises an insertion part and an abutment part, the insertion part is inserted into the second handle, the inside of the abutment part is hollow, the first elastic part is accommodated in the abutment part, an inclined surface is formed on the outer wall of the abutment part which protrudes from the insertion part, and a groove is formed in the outer wall. The movement direction of the second handle close to the first handle is the right direction, and the movement direction of the second handle away from the first handle is the left direction; the initial state is that the orientation column is in the orientation slot and the slot body, when the second handle moves to the right, the inclined surface applies force to the inclined surface, the rotating terminal is forced to move and rotate to the right, the orientation column is separated from the slot body, the lower end of the orientation column abuts against the protruding part of the inclined surface, at this time the second handle moves a distance to the right compared with the initial state, and the first elastic member is compressed; when the second handle is pressed again, the inclined surface applies force to the inclined surface, the rotating terminal is forced to move and rotate to the right, the lower end of the orientation column passes the protruding part and is separated from the inclined surface, and enters the slot body to the right, at this time the first elastic member releases the elastic force and pushes the second handle to move left to reset; in the process of left and right movement of the second handle, since the second handle is connected with the outer tube, the outer tube is stretched and contracted, so that the first electrode is exposed or retracted from the outer tube.

2. The high frequency dissecting knife according to claim 1, wherein The first electrode comprises a first tube body and a first head, the first tube body is arranged along the axial direction of the cable and is hollow inside, and the first head is arranged along the radial direction of the cable and is arranged on the side of the first tube body; The second electrode comprises a second tube body and a second head, the second tube body is arranged along the axial direction of the cable, and the second head is arranged along the radial direction of the cable and arranged on one end of the second tube body; The first insulating head is provided with a through hole, the first tube body is inserted into the through hole, the first head abuts against the side wall of the first insulating head, the second electrode passes through the through hole, and the diameter of the through hole is greater than the outer diameter of the second head and smaller than the outer diameter of the first head.

3. The high frequency knife according to claim 2, characterized by The operation part further comprises a connecting piece and a second insulating head, the two ends of the connecting piece are connected with the cable and the second electrode respectively, and the second insulating head is arranged in the outer tube and fixedly connected with the connecting piece.

4. The high frequency knife according to claim 1, wherein The first handle is provided with a sliding groove in the axial direction, and the pull ring is mounted 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 fixedly connected with the electrode plug.

5. The high frequency knife according to claim 1, wherein The end of the connecting buckle is further provided with a stepped surface, the second handle part 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 stepped surface; When the second handle moves towards the first elastic member, the second elastic member is stretched, and when the second handle is continuously pressed, the second elastic member releases the elastic force and pulls the second handle to reset.

6. The high frequency knife according to claim 1, wherein The cable is a steel wire.

7. The high frequency knife according to claim 1, wherein The outer tube comprises a plastic-coated spring tube wrapped outside the cable, an outer sheath tube sleeved outside the plastic-coated spring tube, and a sheath tube sheath wrapped outside the outer sheath tube.

8. The high frequency knife according to claim 7, characterized by The high-frequency incision knife further comprises an end cap, the end of the sheath sleeve and the outer sheath extends into the end cap from one side, the second handle is inserted into the other side of the end cap, so that the sheath sleeve abuts against the inner wall of the end cap, and the end of the sheath sleeve and the outer sheath is fixed in the end cap.

9. The high frequency knife according to claim 7, wherein The second handle further comprises a sheath connector, which is arranged in the second handle; the front end of the second handle is formed into a plug, which is inserted into the sheath sleeve and is in interference fit with the inner wall of the sheath sleeve; and one end of the outer sheath is fixed in the sheath connector.

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