Plug-in electrode knife

Abstract

The application relates to the technical field of medical devices, in particular to a plug-in electrode knife; the plug-in electrode knife comprises a handle, an electrode knife head, a plug-in connecting piece and a circuit conduction assembly; the plug-in connecting piece is arranged between the handle and the electrode knife head and is used for fixedly connecting the two, the plug-in connecting piece comprises a first plug-in head and a second plug-in head, the first plug-in head is fixedly arranged at the working end of the handle, the electrode knife head is fixed on the second plug-in head, and the first plug-in head and the second plug-in head are detachably plug-in matched; the circuit conduction assembly is arranged in the handle and comprises a control board and an electric transmission line, the two ends of the electric transmission line are electrically connected with the control board and the first plug-in head respectively, the control board is fixedly installed in the handle and is electrically connected with an external host through a power line; the plug-in electrode knife provided by the application can realize reliable and fast plug-in, and has the functions of mistaken plug-in prevention identification, electrical safety interlocking and the like.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a plug-in electrode knife. Background Technology

[0002] High-frequency surgical electrodes are commonly used medical devices in surgery. They achieve tissue cutting and coagulation through the thermal effect generated by high-frequency current. To adapt to the needs of different surgical scenarios, surgical electrodes are usually designed with replaceable blades, meaning that one electrode pen body can be used with a variety of electrode blades of different shapes and functions. The connection methods between the surgical electrode blades and the pen body in the existing technology are mainly threaded connection or snap-on connection.

[0003] In threaded connections, such as those disclosed in Chinese Patent CN212521998U, the connection is achieved through the interplay of internal and external threads, with elastic and clamping elements used to fix the blade. This method requires manual rotation multiple times to complete the connection or disassembly, making the operation cumbersome and time-consuming. Furthermore, the threads are prone to stripping in high-humidity and high-temperature surgical environments, leading to potential safety hazards and connection failure. In snap-fit ​​connections, such as those disclosed in CN219763521U, quick snap-fit ​​is achieved through the cooperation of a locking block, slot, and spring. This method lacks anti-misinsertion design and an insertion detection mechanism, making it impossible to confirm the reliability of the connection. Different blade models may be inserted incorrectly. Moreover, existing plug-in connection structures lack electrical safety interlocking designs, posing a risk of arc burns from live insertion and removal. Therefore, there is an urgent need for a plug-in electrode blade that can achieve reliable and rapid insertion while also possessing functions such as anti-misinsertion identification and electrical safety interlocking. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art and provide a plug-in electrode knife that can achieve reliable and fast plugging, while also having functions such as anti-misplugging identification and electrical safety interlock.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A plug-in electrode knife includes a handle, an electrode tip, a plug-in connector, and a circuit conduction assembly. The plug-in connector is disposed between the handle and the electrode tip for fixing the two together. The plug-in connector includes a first connector and a second connector, wherein the first connector is fixedly disposed at the working end of the handle, and the electrode tip is fixed on the second connector. The first connector and the second connector are detachably plugged into each other. The circuit conduction assembly is disposed inside the handle and includes a control board and an electrical transmission line. The two ends of the electrical transmission line are electrically connected to the control board and the first connector, respectively. The control board is fixedly installed inside the handle and electrically connected to an external host via a power cord.

[0006] Preferably, the first connector includes an insertion surface at one end and an insertion groove formed on the insertion surface, and a plurality of insertion holes are also formed on the insertion surface; the second connector is provided with an insertion part that matches the shape of the insertion groove and extends outward, and a plurality of insertion posts corresponding to the insertion holes are fixedly provided in the insertion part; the first connector and the second connector are detachably connected and engaged by inserting the insertion part into the insertion groove.

[0007] Preferably, the electrical transmission line is provided with wires that are electrically connected to the conductive contacts in each of the plug holes, the plug post is electrically connected to the blade of the electrode head, and the second plug is inserted into the first plug and the electrical connection is achieved by the plug post abutting against the conductive contacts in the plug hole.

[0008] Preferably, the insertion groove of the first connector is further provided with a guide groove extending axially, and the inner wall of the insertion part of the second connector is further provided with a guide rib matching the guide groove. When inserted, the guide rib slides along the guide groove to achieve axial positioning and circumferential anti-rotation.

[0009] Preferably, the second connector on different models or structures of electrode blades can be equipped with different numbers, positions or cross-sectional shapes of guide ribs, and the guide groove in the corresponding first connector can be equipped with a matching groove structure to achieve the function of preventing misinsertion identification.

[0010] Preferably, the plug-in connector is provided with a bipolar locking mechanism, including a magnetic positioning component and a mechanical locking component; the magnetic positioning component includes an annular permanent magnet embedded in the inner wall of the first plug-in connector, and an annular magnetic conductor embedded in the outer wall of the second plug-in connector and cooperating with the annular permanent magnet; the mechanical locking component includes elastic buckles symmetrically arranged in the housing of the first plug-in connector, and a snap-fit ​​groove arranged in the outer wall of the second plug-in connector and cooperating with the elastic buckles.

[0011] Preferably, the elastic buckle is hinged to the housing side wall of the first connector by a pin, and includes a buckle head facing the inside of the first connector and a pressing head facing the outside of the first connector; the buckle head has an guide slope on the side facing the insertion direction and a locking straight surface on the side facing away from the insertion direction.

[0012] Preferably, a reset torsion spring is fitted on the hinge pin of the elastic buckle to provide elastic force for the buckle head to engage with the snap-fit ​​groove; the pressing head is also connected to an unlocking button that extends out of the outer wall of the first plug-in connector for pressing to unlock after the plug-in connector is locked.

[0013] Preferably, the handle is provided with a positioning detection feedback mechanism, including a positioning detection sensor and a status feedback module; the positioning detection sensor is located at the bottom of the inner cavity of the first connector and is used to detect whether the second connector is inserted to a preset depth; the status feedback module is located on the handle and is used to provide feedback based on the signal from the positioning detection sensor.

[0014] Preferably, the status feedback module can be an LED indicator or a buzzer. When the second connector is inserted into place, the status feedback module provides visual or auditory feedback based on the signal from the placement detection sensor.

[0015] Preferably, the plug-in connector is provided with an electrical safety interlock circuit, including a first interlock switch and a second interlock switch; the first interlock switch is linked with the elastic buckle, and two sets of conductive contacts are provided on the surface of the pressing head of the elastic buckle and on the inner wall surface of the first plug that contacts the pressing head. When the plug is plugged in, the two sets of conductive contacts contact, and the first interlock switch closes; the second interlock switch is linked with the positioning detection sensor, and the second interlock switch closes only when the positioning detection sensor detects that the plug is plugged in.

[0016] Preferably, the electrical safety interlock circuit is provided with a high-frequency output control relay connected in series in the circuit output circuit, and the control coil circuit of the high-frequency output control relay is connected in series with the first interlock switch and the second interlock switch.

[0017] In summary, the beneficial effects of this invention are as follows: 1. The plug-in electrode knife of the present invention has a pluggable female head at the working end of the electrode knife body and a pluggable male head that mates with the female head at the tail end of the electrode knife head. The pluggable head has a conductive plug post and a plug hole to enable current conduction. This allows the electrode knife head to be easily installed and removed without any extra operations when it is replaced, which greatly shortens the time for replacing the knife head during surgery. 2. The plug-in electrode knife of the present invention, by using male and female plug-in connectors, allows a set of handles to be adapted to a variety of electrode knife heads with different functions, reducing the repetitive configuration of handles. At the same time, the plug-in connectors on the handles can be automatically assembled and manufactured, improving the intelligence rate and production efficiency, while also reducing product and labor costs. 3. The plug-in electrode knife of the present invention has a guide rib and guide groove structure in the first plug and the second plug to prevent misinsertion. By setting different shapes and configurations, it can effectively prevent misinsertion of electrode knife heads of different models, avoid surgical accidents caused by incorrect knife head models, and improve the safety of the surgical process. 4. The plug-in electrode knife of the present invention is provided with a magnetic-mechanical bipolar locking mechanism. It achieves a reliable connection by mechanically locking and fixing with elastic buckles, and then achieves a stable connection by magnetic locking. The entire plug-in operation is simple and convenient and the locking is more stable and reliable. 5. The plug-in electrode knife of the present invention is equipped with a positioning detection and feedback system at the plug-in connection part. The system detects the plug-in status in real time through sensors and sets up a status feedback module to provide timely feedback to medical staff through sound and light information, ensuring that each plug-in is reliably positioned and eliminating safety hazards caused by loose connection. 6. The plug-in electrode knife of the present invention is provided with a multi-level electrical safety interlock circuit at the plug-in part. By linking the first interlock switch and the second interlock switch with the plug-in action and state, the electrical safety interlock circuit allows the electrode knife to output high-frequency current only after the elastic buckle of the second plug is locked and the position detection is qualified. This fundamentally eliminates the risk of plugging and unplugging while energized or operating when the connection is not secure, and significantly improves the safety of surgical instruments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the plug-in electrode knife of the present invention; Figure 2 This is a schematic diagram of the internal structure of the plug-in electrode knife of the present invention; Figure 3 This is a schematic diagram of the structure of the first connector of the present invention; Figure 4 This is a schematic diagram of the structure of the second connector of the present invention; Figure 5 This is a schematic diagram of the structure of the bipolar locking mechanism of the present invention; Figure 6 This is a schematic diagram of the elastic buckle structure of the present invention; Figure 7 This is a schematic diagram of the positioning detection feedback mechanism of the present invention; Figure 8 This is a schematic diagram of the disconnection structure of the electrical safety interlock circuit of the present invention; Figure 9 This is a schematic diagram of the closed structure of the electrical safety interlock circuit of the present invention.

[0019] The diagram shows: 1. Handle; 2. Electrode tip; 3. Connector; 31. First connector; 311. Connecting surface; 312. Insertion groove; 313. Connecting hole; 314. Guide groove; 32. Second connector; 321. Insertion part; 322. Connecting post; 323. Guide rib; 4. Circuit conduction assembly; 41. Control board; 42. Electrical transmission line; 5. Bipolar locking mechanism; 51. Magnetic positioning assembly; 511. Ring permanent magnet. 512. Ring-shaped magnetic conductor; 52. Mechanical locking assembly; 521. Elastic buckle; 522. Snap-fit ​​groove; 523. Buckle head; 524. Press head; 525. Guide slope; 526. Locking straight surface; 527. Reset torsion spring; 528. Unlock button; 6. Position detection feedback mechanism; 61. Position detection sensor; 62. Status feedback module; 7. Electrical safety interlock circuit; 71. First interlock switch; 72. Second interlock switch. Detailed Implementation

[0020] The following specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Example 1

[0023] according to Figures 1-4 As shown, a plug-in electrode knife includes a handle 1, an electrode head 2, a plug-in connector 3, and a circuit conduction assembly 4. The plug-in connector 3 is disposed between the handle 1 and the electrode head 2 for fixing the two together. The plug-in connector 3 includes a first connector 31 and a second connector 32, wherein the first connector 31 is fixedly disposed at the working end of the handle 1, and the electrode head 2 is fixed on the second connector 32. The first connector 31 and the second connector 32 are detachably plugged in. The circuit conduction assembly 4 is disposed inside the handle 1 and includes a control board 41 and an electrical transmission line 42. The two ends of the electrical transmission line 42 are electrically connected to the control board 41 and the first connector 31, respectively. The control board 41 is fixedly installed inside the handle 1 and is electrically connected to an external host through a power cord.

[0024] according to Figure 3 , Figure 4As shown, the first connector 31 includes a connector surface 311 at the end and an insertion groove 312 formed on the connector surface 311. The connector surface 311 is also provided with a plurality of connector holes 313. The second connector 32 is provided with an insertion part 321 that matches the shape of the insertion groove 312 and extends outward. A plurality of connector posts 322 corresponding to the connector holes 313 are fixedly provided in the insertion part 321. The first connector 31 and the second connector 32 are detachably connected by inserting the insertion part 321 into the insertion groove 312.

[0025] The first connector 31 is fixedly installed at the working end, i.e., the front end, of the handle 1. Its end face is the insertion surface 311, and the insertion surface 311 has an annular insertion groove 312 extending axially inward. The end face of the insertion surface 311 also has multiple insertion holes 313. The tail end of the second connector 32 has an annular insertion part 321 that matches the shape of the insertion groove 312. Multiple insertion posts 322 are fixed inside the second connector 321. The number and position of the insertion posts 322 correspond one-to-one with the insertion holes 313. In use, the insertion part 321 of the second connector 32 is aligned with the insertion groove 312 of the first connector 31 and pushed forward. After insertion, the outer wall of the insertion part 321 and the inner wall of the insertion groove 312 are fitted with a clearance, and the insertion is maintained by friction to prevent loosening.

[0026] according to Figure 2 As shown, the electrical transmission line 42 is provided with wires that are electrically connected to the conductive contacts in each plug hole 313. The plug post 322 is electrically connected to the blade of the electrode head 2. The second plug 32 is inserted into the first plug 31 and the electrical connection is achieved by the plug post 322 abutting against the conductive contacts in the plug hole 313.

[0027] In this device, each plug hole 313 on the first plug 31 is embedded with an elastic conductive contact, and each contact is connected to the electrical transmission line 42 through an independent wire. The plug post 322 on the second plug 32 is made of conductive metal, and it is electrically connected to the conductive blade of the electrode head 2 by welding or crimping. When the plug post 322 is inserted into the corresponding plug hole 313, its end abuts against the conductive contact in the hole to form a reliable electrical contact.

[0028] according to Figure 3 , Figure 4 As shown, the insertion groove 312 of the first connector 31 is also provided with a guide groove 314 extending axially, and the inner wall of the insertion part 321 of the second connector 32 is also provided with a guide rib 323 matching the guide groove 314. When inserted, the guide rib 323 slides along the guide groove 314 to achieve axial positioning and circumferential anti-rotation.

[0029] The insertion slot 312 has at least one guide slot 314. Correspondingly, the outer wall of the insertion part 321 is provided with a guide rib 323 that matches the shape and size of the guide slot 314. When the insertion operation is performed, the guide rib 323 first embeds into the entrance of the guide slot 314, and then slides along the guide slot 314 until it is fully inserted. This structure ensures the precise alignment of the insertion post 322 and the insertion hole 313, avoiding contact damage due to angular deviation. At the same time, after the insertion is completed, the cooperation between the guide rib 323 and the guide slot 314 restricts the circumferential rotation of the second insertion head 32. Even if torque is applied during the operation, the blade will not deflect. Furthermore, the second insertion head 32 on different models or structures of electrode blades 2 can be configured with different numbers, positions or cross-sectional shapes of guide ribs 323. The guide slot 314 in the corresponding first insertion head 31 can be configured with a matching slot structure to achieve the function of preventing misinsertion.

[0030] Example 2

[0031] The difference from Embodiment 1 above is that, according to Figures 5-7 As shown, the plug-in connector 3 is provided with a bipolar locking mechanism 5, including a magnetic positioning component 51 and a mechanical locking component 52; the magnetic positioning component 51 includes an annular permanent magnet 511 embedded in the inner wall of the first plug 31, and an annular magnetic conductor 512 embedded in the outer wall of the second plug 32 and cooperating with the annular permanent magnet 511; the mechanical locking component 52 includes elastic buckles 521 symmetrically arranged in the housing of the first plug 31, and a snap-fit ​​groove 522 arranged in the outer wall of the second plug 32 and cooperating with the elastic buckles 521.

[0032] The magnetic positioning component 51 has an annular magnetic conductor 512 made of pure iron or low-carbon steel, which cooperates with the annular permanent magnet 511 on the inner wall of the first connector 31 to generate magnetic attraction during insertion and achieve pre-positioning. The outer wall of the second connector 32 is symmetrically provided with locking grooves 522, which are annular grooves or partial grooves, used to cooperate with the elastic buckle 521 to achieve mechanical locking. Therefore, the bipolar locking mechanism 5 includes a first-stage magnetic pre-positioning and a second-stage mechanical locking. In the first-stage magnetic positioning component 51, when the second connector 32 is inserted into the first connector 31, the annular permanent magnet 511 and the annular magnetic conductor 512... The magnets 512 generate a magnetic attraction force, which automatically pulls the second connector 32 into the first connector 31, achieving initial positioning and guidance. The magnetic attraction force is designed to be moderate, ensuring both attraction and pre-positioning during insertion, without causing difficulties in insertion and disassembly due to excessive magnetic force. The second-stage mechanical locking component 52 automatically engages the elastic buckle 521 on the first connector 31 with the second connector 32 after it is fully inserted into the locking groove 522 on the outer wall of the second connector 32, ensuring reliability after insertion. It also works in conjunction with the first-stage magnetic positioning component 51 to achieve dual-stage locking through magnetic attraction and mechanical means.

[0033] according to Figure 6 As shown, the elastic buckle 521 is hinged to the housing side wall of the first connector 31 by a pin, including a buckle head 523 facing the inside of the first connector 31 and a pressing head 524 facing the outside of the first connector 31; the buckle head 523 has an guide slope 525 on the side facing the insertion direction and a locking straight surface 526 on the side facing away from the insertion direction; a reset torsion spring 527 is sleeved on the pin hinged to the elastic buckle 521 to provide the elastic force for the buckle head 523 to engage with the locking groove 522; the pressing head 524 is also connected to an unlocking button 528 which extends out of the outer wall of the first connector 31 for pressing to unlock after the connector 3 is locked.

[0034] In this design, the latch head 523 and the pressing head 524 of the elastic latch 521 are arranged in opposite directions. The latch head 523 faces the inside of the housing of the first connector 31, and the pressing head 524 faces the outside of the housing of the first connector 31. They are hinged to the side wall of the first connector 31 by a pin. A return torsion spring 527 is also sleeved on the pin. The two ends of the return torsion spring 527 abut against the elastic latch 521 and the first connector 31 respectively, providing a return force during insertion and removal. An unlocking button 528 is also fixedly installed on the pressing head 524 and extends out of the surface of the first connector 31 for easy pressing and unlocking during operation. Furthermore, the latch head 523 can move independently on the body of the elastic latch 521, and its interior is connected to the elastic latch 521. A return spring is provided between the main bodies of the latch 521 for the latch head 523 to reset itself. During insertion, the outer wall of the second connector 32 presses the latch head 523 into the body of the elastic latch 521 along the guide slope 525, compressing the internal return spring. When the second connector 32 is fully inserted, the outer wall of the second connector 32 disengages from the guide slope 525, and the latch head 523 automatically engages with the locking groove 522 under the elastic force of the return spring, achieving reliable mechanical locking. During disassembly, by pressing the unlock button 528 on the outer wall of the first connector 31, the elastic latch 521 and the latch head 523 above it swing outward to disengage from the locking groove 522, and the second connector 32 can be pulled out.

[0035] according to Figure 7 As shown, the handle 1 is equipped with a positioning detection feedback mechanism 6, including a positioning detection sensor 61 and a status feedback module 62. The positioning detection sensor 61 is located at the bottom of the inner cavity of the first connector 31 and is used to detect whether the second connector 32 is inserted to a preset depth. The status feedback module 62 is located on the handle 1 and is used to provide feedback based on the signal from the positioning detection sensor 61. The positioning detection sensor 61 can be one of a micro switch, a Hall sensor, or a photoelectric sensor. When the positioning detection sensor 61 detects that the second connector 32 is inserted, it will send a signal and transmit it to the status feedback module 62. The status feedback module 62 is equipped with an LED indicator or a buzzer. Its control logic is as follows: when the second connector 32 is not inserted or is not inserted in place, the positioning detection sensor 61 does not detect the insertion of an object, and the status feedback module 62 does not generate feedback. When the second connector 32 is inserted in place, the positioning detection sensor 61 is activated and sends a signal. After receiving the signal, the status feedback module 62 sends out audible and visual feedback to remind the user that the insertion is in place and it is safe to use.

[0036] Example 3

[0037] The difference from Embodiments 1 and 2 above is that, according to Figure 8 , Figure 9As shown, the plug-in connector 3 is equipped with an electrical safety interlock circuit 7, including a first interlock switch 71 and a second interlock switch 72. The first interlock switch 71 is linked with the elastic buckle 521. Two sets of conductive contacts are provided on the surface of the pressing head 524 of the elastic buckle 521 and the inner wall surface of the first plug 31 that contacts the pressing head 524. When the plug is plugged in, the two sets of conductive contacts contact each other, and the first interlock switch 71 closes. The second interlock switch 72 is linked with the position detection sensor 61. The second interlock switch 72 closes only when the position detection sensor 61 detects that the plug is plugged in.

[0038] The first interlock switch 71 is linked to the elastic latch 521. A set of conductive contacts is provided on the surface of the pressing head 524, and another set of conductive contacts is provided on the inner wall surface of the first connector 31. When the elastic latch 521 resets, the two sets of conductive contacts make contact and conduct electricity. Its working logic is as follows: when the second connector 32 is not inserted, although the conductive contacts are in contact, the circuit is not connected. When the second connector 32 is inserted into place, the elastic latch 521 resets, and the conductive contacts of the pressing head 524 connect with the conductive contacts on the inner wall of the first connector 31. When the second interlock switch 72 is activated, the circuit is connected. The second interlock switch 72 is linked to the position detection sensor 61. In this embodiment, the position detection sensor 61 is itself a micro switch, and its normally open contact is directly used as the second interlock switch 72. When the position detection sensor 61 does not detect the insertion of the second connector 32, the contact is normally open, and the second interlock switch 72 is disconnected. When the position detection sensor 61 detects that the second connector 32 is inserted, the position detection sensor 61 switches to the normally closed contact, the second interlock switch 72 closes, and the circuit is activated.

[0039] The electrical safety interlock circuit 7 is equipped with a high-frequency output control relay connected in series in the circuit output circuit. The control coil circuit of the high-frequency output control relay is connected in series with a first interlock switch 71 and a second interlock switch 72. The first interlock switch 71 and the second interlock switch 72 will only close simultaneously when mechanically locked and plugged in. At this time, the control coil of the high-frequency output control relay of the electrical safety interlock circuit 7 is energized, the relay is energized, and the high-frequency current can be output to the electrode tip 2 through the circuit conduction component 4 and the plug-in connector 3. If any condition is not met, that is, if it is not plugged in or mechanically locked in place, the electrical safety interlock circuit 7 remains in the open state, and the high-frequency current cannot be output, thus fundamentally eliminating the safety hazards of plugging and unplugging while energized or working when the connection is not secure.

Claims

1. A plug-in electrode knife, characterized in that, The device includes a handle (1), an electrode tip (2), a connector (3), and a circuit conduction assembly (4). The connector (3) is disposed between the handle (1) and the electrode tip (2) to fix them together. The connector (3) includes a first connector (31) and a second connector (32). The first connector (31) is fixedly disposed at the working end of the handle (1), and the electrode tip (2) is fixed on the second connector (32). The first connector (31) and the second connector (32) are detachably connected. The circuit conduction assembly (4) is disposed inside the handle (1) and includes a control board (41) and an electrical transmission line (42). The two ends of the electrical transmission line (42) are electrically connected to the control board (41) and the first connector (31), respectively. The control board (41) is fixedly installed inside the handle (1) and is electrically connected to an external host through a power cord.

2. The plug-in electrode knife according to claim 1, characterized in that, The first connector (31) includes a plug-in surface (311) at the end and an insertion groove (312) opened on the plug-in surface (311). The plug-in surface (311) is also provided with a plurality of plug-in holes (313). The second connector (32) is provided with an insertion part (321) that matches the shape of the insertion groove (312) and extends outward. A plurality of plug-in posts (322) corresponding to the plug-in holes (313) are fixedly provided in the insertion part (321). The first connector (31) and the second connector (32) are detachably plugged into each other by inserting the insertion part (321) into the insertion groove (312).

3. The plug-in electrode knife according to claim 2, characterized in that, The electrical transmission line (42) is provided with wires that are electrically connected to the conductive contacts in each of the plug holes (313). The plug post (322) is electrically connected to the blade of the electrode head (2). The second plug (32) is inserted into the first plug (31) and the electrical connection is achieved by the plug post (322) abutting against the conductive contacts in the plug hole (313).

4. A plug-in electrode knife according to claim 2, characterized in that, The first connector (31) is provided with an axially extending guide groove (314) on the insertion groove (312), and the second connector (32) is provided with a guide rib (323) matching the guide groove (314) on the inner wall of the insertion part (321). When inserted, the guide rib (323) slides along the guide groove (314) to achieve axial positioning and circumferential anti-rotation.

5. A plug-in electrode knife according to claim 1, characterized in that, The plug-in connector (3) is provided with a bipolar locking mechanism (5), including a magnetic positioning component (51) and a mechanical locking component (52); the magnetic positioning component (51) includes an annular permanent magnet (511) embedded in the inner wall of the first plug (31) and an annular magnetic conductor (512) embedded in the outer wall of the second plug (32) and cooperating with the annular permanent magnet (511); the mechanical locking component (52) includes an elastic buckle (521) symmetrically arranged in the housing of the first plug (31) and a snap-fit ​​groove (522) arranged in the outer wall of the second plug (32) and cooperating with the elastic buckle (521).

6. A plug-in electrode knife according to claim 5, characterized in that, The elastic buckle (521) is hinged to the housing side wall of the first plug (31) by a pin, including a buckle head (523) facing the inside of the first plug (31) and a pressing head (524) facing the outside of the first plug (31); the buckle head (523) has an guide slope (525) on the side facing the insertion direction and a locking straight surface (526) on the side facing away from the insertion direction.

7. A plug-in electrode knife according to claim 6, characterized in that, A reset torsion spring (527) is fitted on the hinge pin of the elastic buckle (521) to provide elastic force for the buckle head (523) to engage with the snap-fit ​​groove (522); an unlock button (528) is also connected to the pressing head (524) and extends out of the outer wall of the first plug (31) for pressing to unlock after the plug connector (3) is locked.

8. A plug-in electrode knife according to claim 6, characterized in that, The handle (1) is provided with a positioning detection feedback mechanism (6), including a positioning detection sensor (61) and a status feedback module (62); the positioning detection sensor (61) is located at the bottom of the inner cavity of the first plug (31) and is used to detect whether the second plug (32) is inserted to a preset depth; the status feedback module (62) is located on the handle (1) and is used to provide feedback based on the signal of the positioning detection sensor (61).

9. A plug-in electrode knife according to claim 8, characterized in that, The plug-in connector (3) is provided with an electrical safety interlock circuit (7), including a first interlock switch (71) and a second interlock switch (72). The first interlock switch (71) is linked with the elastic buckle (521). Two sets of conductive contacts are provided on the surface of the pressing head (524) of the elastic buckle (521) and on the inner wall surface of the first plug (31) that contacts the pressing head (524). When the plug is plugged in, the two sets of conductive contacts contact each other, and the first interlock switch (71) closes. The second interlock switch (72) is linked with the position detection sensor (61). The second interlock switch (72) closes only when the position detection sensor (61) detects that the plug is plugged in.

10. A plug-in electrode knife according to claim 9, characterized in that, The electrical safety interlock circuit (7) is provided with a high-frequency output control relay connected in series in the circuit output circuit. The control coil circuit of the high-frequency output control relay is connected in series with the first interlock switch (71) and the second interlock switch (72).

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