Electrosurgical instrument

Abstract

The utility model relates to an electrosurgical instrument which is applied to the field of medical instruments. The forceps comprise a forceps head assembly, a blade assembly, a handle and a stop piece, wherein the forceps head assembly comprises a forceps rod and a forceps head mounted on the forceps rod; the blade assembly is slidably mounted on the tong head in the first direction, the handle comprises a shell, a tong head driving assembly, a blade driving assembly, a main wrench and a push broach wrench, the tong head driving assembly and the blade driving assembly are arranged in the shell, the main wrench and the push broach wrench are rotatably mounted on the shell, the end, away from the tong head, of the tong rod is mounted on the shell, and the tong head driving assembly enables the tong head assembly to be in transmission connection with the main wrench. The blade driving assembly drives and connects the blade assembly to the push-type broach wrench; the stop piece is arranged on the main wrench and can abut against the push-type broach wrench to prevent the push-type broach wrench from rotating. Through the arrangement of the stop piece, the relative position between the push-type broach wrench and the main wrench is limited, so that the push-type broach wrench cannot rotate before the main wrench rotates, the situation that a blade assembly is accidentally driven to injure personnel is avoided, and the operation stability and safety are improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to an electrosurgical instrument. Background Art

[0002] An electrosurgical cutting and closing instrument applicable to minimally invasive surgery and its end effector are instruments that can enter the human body through a small wound and cut and coagulate blood vessel tissues, and are also one of the instruments widely used in minimally invasive surgery, mainly used for cutting, transecting and coagulating tissues in open or endoscopic surgeries in abdominal surgery, gynecology, pediatrics and thoracic surgery.

[0003] In related technologies, an electrosurgical cutting and closing instrument usually includes two independent driving systems, namely a jaw driving system and a blade driving system. During use, the operator first closes the jaws by means of the jaw driving system to clamp tissues, and then drives the blade to cut the tissues by means of the blade driving system to complete the operation. During actual use, it may occur that the blade driving system is accidentally touched, resulting in the blade being pushed out, which affects the stability of the operation. Summary of the Utility Model

[0004] Based on this, in view of the problem that the blade driving system of the electrosurgical cutting and closing instrument in related technologies is easily accidentally touched and affects the operation stability, it is necessary to provide an electrosurgical instrument.

[0005] This application provides an electrosurgical instrument, adopting the following technical solutions:

[0006] An electrosurgical instrument includes a jaw assembly, a blade assembly, a handle and a stopper. The jaw assembly includes a jaw rod extending in a first direction and a jaw head installed at one end of the jaw rod. The blade assembly is slidably installed on the jaw head along the first direction. The handle includes a housing, a jaw driving assembly and a blade driving assembly provided in the housing, and a main wrench and a push knife wrench rotatably installed on the housing. One end of the jaw rod away from the jaw head is installed on the housing. The jaw driving assembly drives the jaw assembly to be connected to the main wrench, and the blade driving assembly drives the blade assembly to be connected to the push knife wrench. The stopper is provided on the main wrench and can move synchronously with the main wrench. The stopper can abut against the push knife wrench to prevent the rotation of the push knife wrench. Wherein, the main wrench corresponds to the housing and has an initial position and a final position spaced apart from each other. When the main wrench is at the initial position, the jaws are open and the stopper abuts against the push knife wrench. When the main wrench is switched to the final position, the jaws are closed and the stopper disengages from the push knife wrench.

[0007] In one embodiment, the push blade wrench has a yield interval for accommodating the main wrench. When the main wrench is rotated to the initial position, the main wrench is spaced from the inner wall of the yield interval, and the stopper abuts against the push blade wrench; when the main wrench is rotated to the final position, the main wrench can contact the inner wall of the yield interval.

[0008] In one of the embodiments, the stopper is integrally formed on a side wall of the main wrench and extends along the outer edge of the main wrench. The push-blade wrench is provided with an avoidance gap, and the curvature of the avoidance gap is adapted to the curvature of the stopper.

[0009] In one embodiment, the pliers head includes a stationary pliers head fixed to the pliers rod and a movable pliers head rotatably mounted on the pliers rod, and the pliers head drive assembly is transmission-connected between the main wrench and the movable pliers head to control the opening and closing of the pliers head.

[0010] In one embodiment, the pliers head driving assembly includes a moving part, a connecting part, a pliers head driving part and an elastic part. The moving part can move relative to the shell in a first direction, and the moving part is provided with a sliding groove extending along the first direction; the connecting part is slidably installed in the sliding groove, and the connecting part also includes a mounting portion for mounting the pliers rod; the pliers head driving part is drivingly connected between the moving part and the main wrench to drive the moving part to move along the first direction; the elastic part is installed in the sliding groove and is sleeved on the periphery of the connecting part, and the elastic part abuts between the connecting part and the groove wall of the sliding groove.

[0011] In one embodiment, the movable member includes an open position, a closed position and a clamping position which are sequentially arranged relative to the shell, and the connecting member includes a first position and a second position which are sequentially arranged relative to the shell; wherein, when the movable member is in the open position, the connecting member is in the first position, and the pliers head is open; when the movable member is switched to the closed position, the connecting member is switched to the second position, and the pliers head is closed; when the movable member is switched to the clamping position, the connecting member is still in the second position, and the elastic member is compressed and applies pressure to the pliers head, so that the pliers head is clamped.

[0012] In one embodiment, the connecting member includes a pull rod, a fixed sleeve and a convex ridge. Along the first direction, the pull rod is slidably installed in the sliding groove, the convex ridge and the mounting portion are arranged at opposite ends of the pull rod, the fixed sleeve is arranged on the pull rod and connected to the movable member, and the elastic member is arranged on the periphery of the pull rod and abuts between the convex ridge and the fixed sleeve.

[0013] In one embodiment, the jaw driver includes a connecting portion and a connecting rod. The main wrench includes a fixed end and a swinging end arranged at intervals. The fixed end is rotatably installed on the housing, and the swinging end can swing around the fixed end. The connecting portion is connected to the moving member, and the connecting rod is rotatably connected between the swinging end and the connecting portion.

[0014] In one embodiment, the blade driving assembly includes a tool bar, a sliding member, and a blade driver. The tool bar extends along the first direction and is drivingly connected to the blade assembly; the sliding member is drivingly connected to the tool bar and can move along the first direction; the blade driver is drivingly connected to the sliding member to drive the sliding member to move along the first direction.

[0015] In one embodiment, the sliding member includes two slidable portions detachably connected to each other. A sliding channel for the tool bar to pass through is formed between the two slidable portions. The tool bar passes through the sliding channel along the first direction and is fixed to the sliding member.

[0016] In one embodiment, the blade driver includes a transmission gear set and a rack portion. The knife-pushing wrench is provided with a receiving groove, and the rack portion is formed on the groove wall of the receiving groove. The transmission gear set is drivingly connected between the sliding member and the rack portion and is at least partially received in the receiving groove.

[0017] In one embodiment, the transmission gear set includes a sliding rack, a first gear, and a second gear. The sliding rack is fixed to the sliding member and extends along the first direction. The first gear is arranged in the receiving groove and meshes with the rack portion. The second gear is coaxially fixed to the first gear and meshes with the sliding rack.

[0018] In one embodiment, the housing is provided with an installation groove extending along a second direction. The handle further includes a guide rail installed on the main wrench and a locking assembly rotatably installed on the housing. The guide rail includes an introduction area, a locking area, and an export area arranged in sequence; at least part of the locking assembly is received in the installation groove, and the locking assembly can slide along the guide rail between the introduction area, the locking area, and the export area; an angle exists between the second direction and the first direction.

[0019] In one embodiment, the locking assembly includes a rotation prevention piece and two reset members. The reset members are arranged at intervals along the second direction in the installation groove and are connected to the groove wall of the installation groove. The reset members are configured to be able to expand and contract along the second direction. One end of the rotation prevention piece is rotatably installed on the housing and is located between the two reset members, and the other side is slidably connected to the guide rail.

[0020] In one embodiment, a first protrusion is provided on one side of the anti-rotation piece facing the housing. The first protrusion is installed between the two reset pieces and is movably installed in the installation groove. A second protrusion is provided on one side of the anti-rotation piece facing the main wrench. The second protrusion can slide along the guide rail between the introduction area, the locking area, and the export area.

[0021] In one embodiment, the electrosurgical instrument further includes a rotating member, which is connected to the forceps rod and drives the forceps head to rotate axially.

[0022] Through the arrangement of the stop piece, the relative position between the push knife wrench and the main wrench is restricted, so that the push knife wrench cannot rotate before the main wrench rotates, thereby avoiding the situation that the blade assembly is accidentally driven to cause harm to personnel, and improving the surgical stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall view of the electrosurgical instrument in one embodiment of the present application.

[0024] Figure 2 It is a partial cross-sectional view of the electrosurgical instrument in one embodiment of the present application.

[0025] Figure 3 It is an exploded view of the electrosurgical instrument in one embodiment of the present application.

[0026] Figure 4 It is an assembly schematic diagram of the main wrench and the push knife wrench in the initial position in one embodiment of the present application.

[0027] Figure 5 It is an assembly schematic diagram of the main wrench and the push knife wrench in the final position in one embodiment of the present application.

[0028] Figure 6 It is a structural schematic diagram of the forceps head assembly and the forceps head drive assembly in one embodiment of the present application.

[0029] Figure 7 It is a structural schematic diagram of the forceps head assembly and the blade assembly in one embodiment of the present application.

[0030] Figure 8 It is a structural schematic diagram of the forceps head assembly and the blade drive assembly in one embodiment of the present application.

[0031] Figure 9 It is a structural schematic diagram of the housing in one embodiment of the present application.

[0032] Figure 10 It is a structural schematic diagram of the main wrench and the locking assembly in one embodiment of the present application.

[0033] Figure 11 This is a schematic structural diagram of the main wrench and the locking component from another perspective in an embodiment of the present application.

[0034] Explanation of the reference numerals in the drawings:

[0035] 1. Handle; 11. Housing; 111. Mounting member; 1111. Mounting groove; 1112. Relief groove; 112. Left half shell; 113. Right half shell; 114. Limiting boss; 1141. Moving channel; 115. Raised boss; 12. Guide rail; 121. First guiding member; 1211. First guiding arc edge; 1212. Limiting arc edge; 1213. Second guiding arc edge; 1214. Leading-in angle; 122. Second guiding member; 13. Locking component; 131. Anti-rotation piece; 1311. First protruding portion; 1312. Second protruding portion; 1313. Mounting table; 1314. Reinforcing rib; 132. First reset member; 133. Second reset member; 2. Clamping head assembly; 21. Clamping rod; 211. Inner tube; 212. Outer tube; 22. Clamping head; 221. Static clamping head; 2211. Tool passage; 222. Moving clamping head; 3. Blade assembly; 4. Stopper; 5. Clamping head driving assembly; 51. Moving member; 511. Sliding groove; 52. Connecting member; 521. Mounting portion; 5211. Relief notch; 5212. Clamping groove; 522. Pull rod; 523. Fixed sleeve; 524. Ridge; 53. Clamping head driving member; 531. Connecting portion; 532. Link; 54. Elastic member; 55. Guide pin; 56. Positioning ring; 57. Connecting hoop; 58. Clamping head reset member; 6. Blade driving assembly; 61. Tool rod; 62. Sliding member; 621. First sliding portion; 622. Second sliding portion; 623. Third sliding portion; 63. Blade driving member; 631. Transmission gear set; 6311. Sliding rack; 6312. First gear; 6313. Second gear; 632. Rack portion; 64. Limiting member; 65. Abutting member; 66. Blade reset member; 7. Main wrench; 71. Fixed end; 72. Swing end; 8. Knife-pushing wrench; 81. Relief interval; 82. Avoidance notch; 83. Accommodating groove; 9. Rotating member; 91. Fixed seat; 92. Knob; F1. First direction; F2. Second direction; A. Leading-in area; B. Locking area; C. Export area. Detailed implementation manners

[0036] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0038] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0039] In the present application, unless otherwise clearly specified and limited, if there are terms such as "installation", "connection", "attachment", "fixation", etc., these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0041] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation. Among them, the "first direction" can be the extending direction of the forceps rod, and the "second direction" can be the height direction of the handle.

[0042] The following will further elaborate on the embodiments of the present application in conjunction with the attached Figures 1-11 drawings.

[0043] Referring to Figures 1 to 7 the figures, an embodiment of the present application provides an electrosurgical instrument, which can specifically be an instrument that can enter the human body through a small wound and cut and coagulate blood vessel tissues. The electrosurgical instrument includes a handle 1, a forceps head assembly 2 and a blade assembly 3. The forceps head assembly 2 specifically includes a forceps rod 21 and a forceps head 22. The forceps head 22 is disposed at one end of the forceps rod 21 for clamping tissues. The blade assembly 3 is slidably mounted on the forceps head 22 along the first direction F1 to facilitate the operator to perform coagulation or cutting treatment on the clamped tissues. The handle 1 is disposed at the end of the forceps rod 21 away from the forceps head 22 for the operator to hold.

[0044] Specifically, the forceps head 22 includes a movable forceps head 222 and a stationary forceps head 221. The stationary forceps head 221 is fixed to the outer tube 212 of the forceps rod 21. The movable forceps head 222 is movably connected to the inner tube 211 of the forceps rod 21 and can rotate relative to the stationary forceps head 221 to realize the opening and closing control of the forceps head assembly 2. Among them, the stationary forceps head 221 is provided with a tool channel 2211 extending along the first direction F1. The blade assembly 3 can be slidably mounted in the tool channel 2211 along the first direction F1, and the blade assembly 3 can slide along the tool channel 2211 under the drive of the blade drive assembly 6 to realize the cutting operation on blood vessel tissues.

[0045] Referring to Figure 2 and Figure 3 the figures, in some embodiments, the handle 1 includes a housing 11 and a main wrench 7 and a push knife wrench 8 rotatably mounted in the housing 11. The main wrench 7 can be rotatably mounted in the housing 11 through a pin shaft or a bolt. Similarly, the push knife wrench 8 can be rotatably mounted in the housing 11 through a pin shaft or a bolt.

[0046] Further, the handle 1 further includes a jaw driving assembly 5 and a blade driving assembly 6 disposed within the housing 11. The above-mentioned jaw rod 21 is installed on one side of the housing 11. The jaw driving assembly 5 drives and connects the jaw assembly 2 to the main wrench 7 to realize the opening and closing control of the jaws 22. The blade driving assembly 6 drives and connects the blade assembly 3 to the push knife wrench 8 to realize the sliding drive of the blade assembly 3 in the first direction F1.

[0047] Combined Figure 4 with Figure 5 as shown, it can be understood that according to the conventional surgical procedure, the operator first needs to use the jaw driving assembly 5 to drive the jaws 22 to close to clamp the tissue, and then use the blade driving assembly 6 to cut the clamped tissue, thereby completing the operation. Therefore, the blade assembly 3 should be driven after the jaw assembly 2 to avoid the blade being accidentally pushed out and causing harm to personnel, or even affecting the surgical stability. Thus, the handle 1 of the present application further includes a stopper 4 fixed to the main wrench 7 and capable of abutting against the push knife wrench 8 to limit the relative position between the push knife wrench 8 and the main wrench 7, and further prevent the push knife wrench 8 from rotating before the main wrench 7 rotates.

[0048] Specifically, the main wrench 7 has an initial position and a final position spaced apart corresponding to the housing 11. When the main wrench 7 is in the initial position, the jaws 22 are open, and the stopper 4 abuts against the push knife wrench 8 to prevent the push knife wrench 8 from rotating. When the main wrench 7 is switched to the final position, the jaws 22 are closed, and the stopper 4 disengages from the push knife wrench 8 to release the restriction on the rotation of the push knife wrench 8. In the present application, through the setting of the stopper 4, the relative position between the push knife wrench 8 and the main wrench 7 is restricted, so that the push knife wrench 8 cannot rotate before the main wrench 7 rotates, thereby avoiding the situation that the blade assembly 3 is accidentally driven and causing harm to personnel, and improving the surgical stability and safety.

[0049] Continuing to refer to Figure 4 and Figure 5 as shown, the push knife wrench 8 has a clearance section 81 for accommodating the main wrench 7. When the main wrench 7 rotates to the initial position, there is a gap between the main wrench 7 and the inner wall of the clearance section 81. At this time, the stopper 4 abuts against the push knife wrench 8 to prevent the push knife wrench 8 from rotating. When the main wrench 7 rotates from the initial position to the final position, the push knife wrench 8 can rotate immediately, and the gap between the main wrench 7 and the inner wall of the clearance section 81 gradually decreases, and even can contact the inner wall of the clearance section 81. In the embodiment of the present application, the clearance section 81 is provided to adapt to the stroke requirement of the push knife wrench 8, so as to avoid interference or jamming between the push knife wrench 8 and the main wrench 7 during rotation, and further ensure the normal movement of the blade assembly 3.

[0050] Further, in some other embodiments, the stopper 4 is integrally formed on one side wall of the main wrench 7 and extends along the outer edge of the main wrench 7. The push knife wrench 8 is provided with an avoidance notch 82, and the radian of the avoidance notch 82 is adapted to the radian of the stopper 4. In addition, in the embodiments of the present application, the stopper 4 is configured as a meandering strip structure, which can, on the one hand, play a role in restricting the rotation of the push knife wrench 8, and on the other hand, can also serve as a rib structure to enhance the structural strength of the main wrench 7 and enhance the connection strength by increasing the connection area with the main wrench 7.

[0051] Combined Figure 2 、 Figure 3 and Figure 6 As shown, in some embodiments, the jaw driving assembly 5 includes a moving member 51, a connecting member 52, a jaw driving member 53 and an elastic member 54. The connecting member 52 is slidably connected to the moving member 51 by means of the elastic member 54. The jaw driving member 53 is used to drive the moving member 51, the connecting member 52 and the elastic member 54 to move along the first direction F1 to drive the axial movement of the jaw rod 21.

[0052] Among them, the moving member 51 is configured as a slider having a sliding groove 511 at the top. Along the first direction F1, the moving member 51 includes an open position, a closed position and a clamping position arranged in sequence relative to the handle 1. The connecting member 52 includes an installation portion 521 for installing the inner tube 211. The connecting member 52 can be slidably installed in the sliding groove 511 to drive the inner tube 211 to slide along the first direction F1, thereby realizing the opening and closing control of the jaws 22.

[0053] Along the first direction F1, the connecting member 52 includes an initial position and a final position arranged in sequence relative to the handle 1. The elastic member 54 is also installed in the sliding groove 511. The connecting member 52 includes a fixing sleeve 523 installed on the moving member 51. The elastic member 54 is sleeved on the periphery of the connecting member 52 and abuts between the connecting member 52 and the fixing sleeve 523 to realize the restriction of the relative position between the connecting member 52 and the moving member 51, and to enable the connecting member 52 to move synchronously with the moving member 51 before the jaws 22 are closed.

[0054] Specifically, when the jaw driving member 53 does not apply a driving force to the moving member 51, the moving member 51 is in the open position, the connecting member 52 is in the initial position, and the jaws 22 are open; when the jaw driving member 53 applies a certain driving force to the moving member 51, the moving member 51 moves from the open position to the closed position under the action of the driving force, the connecting member 52 moves synchronously under the drive of the moving member 51 and reaches the final position, driving the movable jaw 222 to rotate relative to the stationary jaw 221 to realize the closing of the jaws 22;

[0055] When the jaw driving member 53 continues to apply a driving force to the moving member 51, under the drive of the driving force, the moving member 51 continues to move from the closed position and reaches the clamping position. At this time, since the jaws 22 are already in the closed state, the inner tube 211 connected to the movable jaw 222 cannot continue to move, so that the connecting member 52 is limited to the final position. At this time, the moving member 51 continues to move and compresses the elastic member 54, and the elastic member 54 will apply a pressure to the connecting member 52 to drive the connecting member 52 to have a tendency to move synchronously with the moving member 51, and further make the movable jaw 222 have a tendency to continue to rotate towards the direction of the stationary jaw 221, and clamp on the stationary jaw 221, so as to facilitate coagulation and cutting treatment of tissues.

[0056] Continuing to refer to Figure 6 As shown, in some embodiments, the jaw driving assembly 5 further includes a jaw reset member 58 installed between the moving member 51 and the housing 11. The jaw reset member 58 can abut between the moving member 51 and the housing 11 and apply a thrust to the moving member 51 in the direction opposite to the above-mentioned driving force, so that the moving member 51 always maintains a tendency to move towards the open position, thereby realizing the self-resetting function of the moving member 51.

[0057] In the embodiment of the present application, the jaw reset member 58 and the elastic member 54 may specifically be springs. It can be understood that in order to enable the operator to have a better operating feel, the jaw reset member 58 may be selected as a spring with a smaller spring constant compared to the spring constant of the elastic member 54, so that the operator can more easily operate the jaw driving member 53 to drive the moving member 51 to move.

[0058] In addition, during the actual operation process, since the spring constant of the jaw reset member 58 itself is small, it is not easy to cause too much obstruction to the movement of the moving member 51, while the elastic member 54 has a large spring constant. After the jaws 22 are closed, the thrust generated by the compression of the elastic member 54 will also act on the moving member 51 and hinder the movement of the moving member 51, so that the operator can judge the state of the jaws 22 through the resistance received by holding the handle 1 by hand, improving the use convenience of the electrosurgical instrument.

[0059] Combined with Figure 3 and Figure 6 As shown, in some embodiments, the connecting member 52 further includes a pull rod 522 and a convex rib 524. Along the first direction F1, the pull rod 522 is slidably installed in the sliding groove 511. The above-mentioned mounting portion 521 and the convex rib 524 are respectively arranged at opposite ends of the pull rod 522, the convex rib 524 surrounds the side wall of the pull rod 522, and the mounting portion 521, the pull rod 522 and the convex rib 524 are constructed as an integral structure.

[0060] The above-mentioned fixed sleeve 523 can specifically be a spring limit sleeve. The fixed sleeve 523 is sleeved on one end of the pull rod 522 close to the installation part 521 and is connected to the moving part 51. The fixed sleeve 523 is slidably connected to the pull rod 522. The elastic member 54 is sleeved on the periphery of the pull rod 522 and abuts between the fixed sleeve 523 and the convex rib 524 to achieve axial limitation of the elastic member 54.

[0061] In some other embodiments, in order to facilitate assembly, a limit block is provided on the moving part 51, and a limit groove is axially formed in the side wall of the fixed sleeve 523. The limit block can be fitted and embedded into the limit groove to achieve rapid assembly. After assembly, along the first direction F1, the limit block can abut against the groove wall of the limit groove to achieve axial limitation of the fixed sleeve 523.

[0062] Furthermore, in some embodiments, the jaw driving assembly 5 further includes a guide pin 55. The guide pin 55 is disposed between the pull rod 522 and the moving part 51 along the first direction F1, so that the pull rod 522 can always be coaxial with the moving part 51, thereby realizing the guiding and limiting functions of the pull rod 522, and enabling the pull rod 522 to always slide along the first direction F1.

[0063] In some other embodiments, the jaw driving assembly 5 further includes a positioning ring 56 and a connecting hoop 57 disposed in the sliding groove 511. The positioning ring 56 can be installed on the groove wall of the sliding groove 511 by means of the connecting hoop 57, and the connecting hoop 57 is connected to an external power supply through a wire. In the embodiments of the present application, the pull rod 522 can pass through the positioning ring 56 along the first direction F1. During the movement of the pull rod 522, the inner ring of the positioning ring 56 can contact the side wall of the pull rod 522 to achieve the guiding, conducting, and limiting functions of the pull rod 522.

[0064] Continue to refer to Figure 6 As shown, in some embodiments, the jaw driving member 53 includes a connecting portion 531 and a connecting rod 532. Specifically, the main wrench 7 includes a fixed end 71 and a swinging end 72 arranged at intervals. The fixed end 71 can be rotatably installed on the housing 11 by means of a pin shaft, and the swinging end 72 can swing around the fixed end 71 under the driving force applied by the operator's hand. The connecting portion 531 is fixed to the moving part 51, and the connecting rod 532 is rotatably installed between the swinging end 72 of the main wrench 7 and the connecting portion 531.

[0065] During use, the operator applies external force to the main wrench 7 to drive the swing end 72 of the main wrench 7 to rotate around the fixed end 71, and drives the connecting portion 531 to move along the first direction F1 through the connecting rod 532, thereby driving the moving member 51 to move along the first direction F1, and further driving the pull rod 522 to move, so as to drive the clamp head 22 to close. After the clamp head 22 is closed, the operator continues to apply external force to the main wrench 7, and the moving member 51 will continue to move along the first direction F1 (from the closed position to the clamping position) and compress the elastic member 54, further making the pull rod 522 have a tendency to move along the first direction F1, thereby applying additional pressure to the moving clamp head 222 to ensure the clamping stability, so as to facilitate the coagulation and cutting treatment of the tissue.

[0066] Combine 3 and Figure 6 As shown, in some embodiments, the electrosurgical instrument further includes a rotating member 9 mounted on the clamp rod 21, and the rotating member 9 includes a fixing seat 91 fixed to the clamp rod 21 and a knob 92 mounted on the fixing seat 91. In the embodiment of the present application, the fixing seat 91 is clamped to the side wall of the clamp rod 21, and the housing 11 includes a left half shell 112 and a right half shell 113 that can be clamped to each other, and the left half shell 112 and the right half shell 113 are clamped together on the fixing seat 91 to achieve axial limitation of the fixing seat 91.

[0067] The knob 92 is covered on the periphery of the left half shell 112, the right half shell 113 and the fixing seat 91 and is clamped on the fixing seat 91. When the operator turns the knob 92, the fixing seat 91 is driven to rotate, and the forceps rod 21 is further driven to rotate, so as to drive the forceps head 22 to rotate. In some other embodiments, the electrosurgical instrument further includes a fixing ring sleeved on the periphery of the left half shell 112 and the right half shell 113, and the fixing ring is used to further enhance the connection stability between the housing 11 and the fixing seat 91.

[0068] Furthermore, in order to meet the requirement of axial rotation of the clamp rod 21, the mounting portion 521 is constructed as a round rod-shaped structure coaxially arranged with the pull rod 522, and a clearance notch 5211 and a clamping groove 5212 for connecting the inner tube 211 are provided at one end of the mounting portion 521 away from the pull rod 522. In the embodiment of the present application, the clearance notch 5211 is a "U"-shaped notch that penetrates the end face of the mounting portion 521 away from the pull rod 522, and the clamping groove 5212 is arranged in the clearance notch 5211 and communicates with the clearance notch 5211. The end of the inner tube 211 away from the movable clamp head 222 can be rotatably mounted on the mounting portion 521 by means of the clamping groove 5212, so that axial rotation can be performed while meeting the axial limit.

[0069] See also Figure 7 and Figure 8As shown, the blade driving assembly 6 includes a tool bar 61 disposed in the forceps bar 21 and connected to the blade assembly 3, a sliding member 62 fixed to the tool bar 61, and a blade driving member 63 drivingly connected to the sliding member 62. Among them, the tool bar 61 extends along the first direction F1, and the blade driving member 63 can drive the sliding member 62 to slide along the first direction F1, so as to drive the blade assembly 3 to move and cut along the first direction F1 by means of the tool bar 61.

[0070] In some embodiments, the sliding member 62 includes two slidable parts that are detachably connected. In the embodiments of the present application, for the convenience of description, the two slidable parts are respectively named the first slidable part 621 and the second slidable part 622. A sliding channel for the tool bar 61 to pass through is formed between the first slidable part 621 and the second slidable part 622. The tool bar 61 can pass through the sliding channel along the first direction F1 and be fixed to the sliding member 62 to realize the driving connection between the tool bar 61 and the sliding member 62.

[0071] Furthermore, for the convenience of assembly, in the embodiments of the present application, the first slidable part 621 and the second slidable part 622 are configured to be axially symmetric structures with the central axis of the tool bar 61 as the axis, and the first slidable part 621 and the second slidable part 622 are detachably connected by means of snap connection.

[0072] Specifically, the first slidable part 621 includes at least one snap block integrally formed on the end face of the first slidable part 621 facing the second slidable part 622. The second slidable part 622 is provided with a slot corresponding to the snap block. The snap block of the first slidable part 621 can be inserted into the slot of the second slidable part 622 along the radial direction of the tool bar 61 to realize the detachable connection between the first slidable part 621 and the second slidable part 622.

[0073] During actual assembly, the first slidable part 621 and the second slidable part 622 are configured into the sliding member 62 by means of snap connection. The sliding member 62 is directly sleeved on the tool bar 61, making the overall structure of the blade driving assembly 6 simpler. In the embodiments of the present application, the first slidable part 621 and the second slidable part 622 are preferably snap-connected up and down. During installation, the second slidable part 622 can be installed first, then the tool bar 61, and finally the first slidable part 621 is snapped onto the second slidable part 622 to fix the tool bar 61. The selected assembly method of the sliding member 62 of the present application omits the step of pre-fixing the tool bar 61 to the C-shaped slider, making the installation of the blade driving assembly 6 more convenient and simplifying the installation steps.

[0074] Refer to Figure 3 and Figure 8As shown, in some other embodiments, the sliding member 62 also includes a third sliding portion 623 arranged between the first sliding portion 621 and the second sliding portion 622, and the third sliding portion 623 can be fixed to the first sliding portion 621 or the second sliding portion 622, and the above-mentioned sliding channel can penetrate the third sliding portion 623 along the first direction F1 to achieve the connection between the knife rod 61 and the sliding member 62.

[0075] In the embodiment of the present application, only the third sliding portion 623 is integrally formed on the second sliding portion 622 as an example for illustration. It is understandable that in other embodiments, the third sliding portion 623 can also be fixed to the first sliding portion 621 by means such as bonding, integral injection molding, etc.

[0076] Continue reading Figure 3 As shown, in some other embodiments, the blade drive assembly 6 further includes two limit members 64, and the two limit members 64 are disposed along the first direction F1 on two opposite sides of the third sliding portion 623. In the embodiment of the present application, two limit grooves are provided on the knife bar 61 along the first direction F1, and the two limit grooves are disposed one by one with the two limit members 64.

[0077] During the assembly process, after the tool rod 61 passes through the third sliding portion 623 through the sliding channel along the first direction F1, the two limit grooves are respectively located on the opposite sides of the third sliding portion 623 in the first direction F1. The operator inserts the limit members 64 into the limit grooves accordingly, so that a pair of limit members 64 are jointly clamped on the third sliding portion 623, thereby realizing the limitation of the tool rod 61 in the first direction F1 (axial direction).

[0078] Furthermore, in order to avoid the setting of the limit member 64 to hinder the axial rotation of the knife rod 61, in the embodiment of the present application, the limit groove is constructed as an annular groove and is arranged along the circumference of the knife rod 61, so that the knife rod 61 can achieve axial rotation while the axial displacement is limited.

[0079] Combination Figure 3 and Figure 8 As shown, the blade driving member 63 includes a push blade wrench 8 and a transmission gear set 631, wherein the push blade wrench 8 is rotatably installed on the handle 1, and the transmission gear set 631 is transmission-connected between the push blade wrench 8 and the sliding member 62, so that the operator can drive the blade assembly 3 to move along the first direction F1 by rotating the push blade wrench 8.

[0080] Among them, the push - knife wrench 8 includes a receiving groove 83. A rack portion 632 is formed on the groove wall of the receiving groove 83. The transmission gear set 631 can be drivingly connected between the sliding member 62 and the rack portion 632. In the embodiment of the present application, the receiving groove 83 can be a waist - shaped groove penetrating through the push - knife wrench 8. The rack portion 632 can specifically be an arc - shaped rack integrally formed on the groove wall of the receiving groove 83. The rack portion 632 can specifically be formed on the push - knife wrench 8 by injection molding, without the need to additionally connect a rack to the push - knife wrench 8, and the structure is simple.

[0081] Specifically, the transmission gear set 631 includes a sliding rack 6311, a first gear 6312, and a second gear 6313. The sliding rack 6311 extends along the first direction F1 and is fixed to the side wall of the sliding member 62, specifically, it can be fixed to the side wall of the second sliding portion 622 on the side facing away from the first sliding portion 621. Both the first gear 6312 and the second gear 6313 are common cylindrical gears. The difference is that the radial dimension of the first gear 6312 is much smaller than the radial dimension of the second gear 6313.

[0082] After assembly, the first gear 6312 can be completely received in the receiving groove 83 of the push - knife wrench 8 and meshed with the rack portion 632. The first gear 6312 and the second gear 6313 are coaxially fixed, and the second gear 6313 meshes with the above - mentioned sliding rack 6311. The overall structure is compact, which is beneficial to reducing the size of the entire handle 1 in the width direction and can reserve more accommodation space for other components inside the handle 1.

[0083] Combined Figure 3 、 Figure 7 and Figure 8 As shown in, when an external force is applied to the push - knife wrench 8, the push - knife wrench 8 rotates relative to the handle 1 under the action of the external force. Thus, through the transmission cooperation between the rack portion 632 and the first gear 6312, the second gear 6313 is driven to rotate. Furthermore, through the transmission cooperation between the second gear 6313 and the sliding rack 6311, the sliding member 62 is pushed to move along the first direction F1. The blade slider drives the tool bar 61 to move along the first direction F1, so that the blade assembly 3 at the front end of the tool bar 61 advances along the tool channel 2211 inside the static jaw 221, thereby cutting the tissue clamped between the moving jaw 222 and the static jaw 221.

[0084] Refer to Figure 3 and Figure 8 As shown in, in some embodiments, the blade driving assembly 6 further includes an abutting member 65 and a blade resetting member 66. The abutting member 65 is sleeved and fixed on the periphery of the pliers rod 21. The blade resetting member 66 is sleeved on the periphery of the tool bar 61 and abuts between the abutting member 65 and the sliding member 62. Along with the movement of the sliding member 62, the blade resetting member 66 will be compressed along the first direction F1.

[0085] In the embodiment of the present application, the blade reset member 66 may specifically be a spring. After the cutting is completed, when the operator removes the external force applied to the push knife wrench 8, the sliding member 62 will return from the end position to the initial position under the push of the blade reset member 66, thereby driving the tool bar 61 to return to the initial position, causing the blade assembly 3 to return to the initial position along the tool path 2211, and at the same time driving the push knife wrench 8 and the transmission gear set 631 to automatically reset.

[0086] Refer to Figures 1 to 3 As shown, along the rotation path of the main wrench 7, the end position of the main wrench 7 is set after the initial position. The main wrench 7 can move from the initial position to the end position to fix the relative position between the main wrench 7 and the housing 11, so that the jaw 22 can maintain the current open / closed state after the operator contacts and applies force to the main wrench 7.

[0087] Combined with Figures 9 to 11 As shown, in some embodiments, the handle 1 further includes a guide rail 12 installed on the main wrench 7, and the guide rail 12 is integrally formed on the end face of the main wrench 7 facing the housing 11. Along the extension direction of the guide rail 12, the guide rail 12 includes an introduction area A, a locking area B, and an export area C arranged in sequence.

[0088] The housing 11 includes a mounting member 111 with a mounting groove 1111 opened therein. The mounting groove 1111 extends along the second direction F2. The handle 1 further includes a locking component 13 rotatably installed on the housing 11 and at least partially received in the mounting groove 1111. The locking component 13 can slide along the guide rail 12 between the introduction area A, the locking area B, and the export area C along with the rotation of the main wrench 7 to lock and release the position of the main wrench 7.

[0089] Specifically, when the main wrench 7 moves from the initial position to the end position, the locking component 13 correspondingly moves from the introduction area A to the locking area B to fix the position of the main wrench 7; when the main wrench 7 moves from the end position to the initial position, the locking component 13 correspondingly moves from the locking area B to the export area C. At this time, the limit of the main wrench 7 is released and it can freely move to the initial position.

[0090] Combined with Figure 10 and Figure 11As shown, the locking assembly 13 includes a rotation-stop piece 131 and two reset members. In the embodiments of the present application, for the convenience of description, the two reset members are respectively named the first reset member 132 and the second reset member 133. The first reset member 132 and the second reset member 133 are both installed in the installation groove 1111 and are spaced apart along the second direction F2. The opposite ends of the first reset member 132 and the second reset member 133 are respectively fixed on the opposite sides of the installation member 111, so that the reset members are fixed in the installation groove 1111. Wherein, the first reset member 132 and the second reset member 133 can both be springs.

[0091] In some embodiments, the housing 11 further includes a limiting boss 114 provided in the installation groove 1111 and integrally formed with the installation member 111. Along the second direction F2, the limiting boss 114 is provided with a moving channel 1141 for the rotation-stop piece 131 to pass through. Along the second direction F2, the first reset member 132 and the second reset member 133 respectively abut against the opposite sides of the limiting boss 114 to respectively limit the first reset member 132 and the second reset member 133 in the second direction F2, so as to avoid the situation that the reset ability (elastic force) of the reset member is weakened after long-term use and affects the initial position of the rotation-stop piece 131.

[0092] Further, in some other embodiments, the housing 11 further includes two heightening bosses 115 integrally formed in the installation groove 1111. The two heightening bosses 115 are respectively arranged corresponding to the first reset member 132 and the second reset member 133. In the embodiments of the present application, the heightening boss 115 is configured as a strip-shaped structure extending along the second direction F2. One ends of the first reset member 132 and the second reset member 133 close to the limiting boss 114 are clamped between the heightening boss 115 and the rotation-stop piece 131 to limit the reset member in the width direction of the handle 1, so as to ensure that the first reset member 132 and the second reset member 133 always expand and contract along the second direction F2.

[0093] Combined with FIGS. 9 to Figure 11 As shown, the rotation-stop piece 131 has an installation platform 1313, and the installation platform 1313 is rotationally installed on the housing 11 through a pin shaft structure. On the side of the rotation-stop piece 131 facing the handle 1, there is a first protrusion 1311, and the first protrusion 1311 is installed in the gap between the first reset member 132 and the second reset member 133, which is used to enable the rotation-stop piece 131 to move along the second direction F2 in the installation groove 1111 through the moving channel 1141, so that the rotation-stop piece 131 is movably connected inside the housing 11. On the side of the rotation-stop piece 131 facing the main wrench 7, there is a second protrusion 1312, and the second protrusion 1312 can slide along the guide rail 12 between the introduction area A, the locking area B and the export area C, so that the rotation-stop piece 131 can be slidably connected to the guide rail 12.

[0094] Further, in some other embodiments, a reinforcing rib 1314 is provided on the side of the anti-rotation piece 131 facing the handle 1, and the reinforcing rib 1314 extends from the direction where the first protrusion 1311 is located to the direction where the second protrusion 1312 is located. The first protrusion 1311, the second protrusion 1312, the mounting table 1313, and the reinforcing rib 1314 are integrally formed on the body of the anti-rotation piece 131, and the mounting table 1313 is collinear with the first protrusion 1311 and the second protrusion 1312, and the first protrusion 1311 is located between the second protrusion 1312 and the mounting table 1313.

[0095] Correspondingly, a relief groove 1112 is formed on the side of the mounting member 111 facing the anti-rotation piece 131, and the relief groove 1112 communicates with the mounting groove 1111 for accommodating the reinforcing rib 1314. In the embodiment of the present application, the relief groove 1112 is configured as a trapezoidal groove. Along the direction away from the mounting table 1313, the dimension of the mounting groove 1111 in the width direction gradually increases to adapt to the movement track of the reinforcing rib 1314.

[0096] Referring to Figure 10 and Figure 11 As shown, in some other embodiments, the first protrusion 1311 is configured as a waist-shaped structure, and the end face of the moving channel 1141 facing the first protrusion 1311 is configured as an arc surface that fits the outer edge of the first protrusion 1311, so as to facilitate the first protrusion 1311 to slide in the mounting groove 1111 through the moving channel 1141.

[0097] In addition, in the embodiment of the present application, configuring the first protrusion 1311 as a waist-shaped structure can effectively increase the connection area between the first protrusion 1311 and the end face of the anti-rotation piece 131 compared with configuring it as other structures, such as a cylindrical structure, thereby increasing the connection stability between the first protrusion 1311 and the anti-rotation piece 131.

[0098] Continuing to refer to Figures 9 to 11 As shown, the guide rail 12 includes a first guide member 121 and a second guide member 122 arranged at intervals, and an introduction area A, a locking area B, and an export area C for the movement of the second protrusion 1312 are formed between the first guide member 121 and the second guide member 122. In the embodiment of the present application, the first guide member 121 is configured as a structure approximately in the shape of an acute triangle, and the long side of the triangle is attached to the outer edge of the main wrench 7, and the short side of the triangle is recessed toward the central position of the triangle. The second guide member 122 is configured as a structure with a sharp corner, and the sharp corner of the second guide member 122 protrudes toward the direction where the depression of the first guide member 121 is located to cooperate with the first guide member 121 to define the above-mentioned locking area B, and the introduction area A and the export area C are respectively arranged on opposite sides of the locking area B and are connected to the locking area B.

[0099] Specifically, the first guiding member 121 includes a first guiding arc edge 1211, a limiting arc edge 1212, and a second guiding arc edge 1213 that are sequentially connected. Among them, the first guiding arc edge 1211 and the second guiding arc edge 1213 are the two long sides of a triangular structure. The first guiding arc edge 1211 is located outside the main wrench 7 and fits with the outer edge of the main wrench 7. The second guiding arc edge 1213 is located inside the main wrench 7. The limiting arc edge 1212 is the short side of the triangular structure. An introducing angle 1214 is formed at the connection of the first guiding arc edge 1211 and the second guiding arc edge 1213.

[0100] For Figure 10 and Figure 11 Taking the example shown in the figure, in the embodiment of the present application, in order to ensure the reliability of the locking structure, when the main wrench 7 is in the initial position, that is, when the main wrench 7 is not stressed, in the height direction of the electrosurgical instrument, the position where the second protrusion 1312 is located is higher than the position where the introducing angle 1214 is located, so that the main wrench 7 can smoothly enter the introducing area A by sliding along the first guiding arc edge 1211 after being driven by an external force.

[0101] During the actual use process, when the operator applies an external force to the main wrench 7, the main wrench 7 moves from the initial position to the final position under the action of the external force. The second protrusion 1312 moves along the first guiding arc edge 1211 until it enters the introducing area A. At the same time, the first protrusion 1311 compresses the second restoring member 133 along the second direction F2. Then, under the elastic potential energy of the second restoring member 133, the second protrusion 1312 moves to the locking area B and abuts against the limiting arc edge 1212, that is, the locking function is realized. At this time, the main wrench 7 also reaches the final position accordingly.

[0102] When it is necessary to release the locked state, the operator needs to continue to apply an external force to the main wrench 7. The main wrench 7 moves from the final position to the initial position under the action of the external force. The second protrusion 1312 moves out of the locking area B and enters the exporting area C along the limiting arc edge 1212 and the second guiding arc edge 1213 in sequence. At the same time, the first protrusion 1311 compresses the first restoring member 132 along the second direction F2. Subsequently, it returns to the initial position, that is, the initial position, under the elastic potential energy of the first restoring member 132, ending the locking.

[0103] In the embodiment of the present application, the first reset member 132 and the second reset member 133 are arranged in the housing 11 to push the anti-rotation piece 131 to move along the guide rail 12, so that the anti-rotation piece 131 cooperates with the guide rail 12 on the side surface of the main wrench 7, thereby reducing the lateral dimension of the whole handle 1 and making the overall structure of the electrosurgical instrument simpler and more compact. Further, as shown in the present application, the mounting member 111 and the locking assembly 13 of the handle 1 are both mounted on the upper side of the holding part of the handle 1, and the cooperation position of the main wrench 7 and the locking assembly 13 is also on the upper side of the holding part of the handle 1, because the space under the holding part can be saved for the installation of other components, such as the activation button for the electrosurgical instrument.

[0104] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0105] The above embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An electrosurgical instrument, characterized in that, The electrosurgical instrument comprises: A clamp head assembly, comprising a clamp rod extending along a first direction, and a clamp head mounted on one end of the clamp rod; A blade assembly is slidably mounted on the pliers head along the first direction; The handle comprises a housing, a pliers head drive assembly and a blade drive assembly arranged in the housing, and a main wrench and a push blade wrench rotatably mounted on the housing, the end of the pliers rod away from the pliers head is mounted on the housing, the pliers head drive assembly drives the pliers head assembly to be connected to the main wrench, and the blade drive assembly drives the blade assembly to be connected to the push blade wrench; and A stopper, which is provided on the main wrench and can move synchronously with the main wrench, and the stopper can abut against the push-knife wrench to prevent the push-knife wrench from rotating; Wherein, the main wrench is provided with an initial position and an end position spaced apart from each other corresponding to the shell. When the main wrench is located at the initial position, the pliers head is opened, and the stopper abuts against the push blade wrench; when the main wrench is switched to the end position, the pliers head is closed, and the stopper is disengaged from the push blade wrench.

2. The electrosurgical instrument according to claim 1, wherein The push-knife wrench has a yield interval for accommodating the main wrench. When the main wrench is rotated to the initial position, the main wrench is spaced from the inner wall of the yield interval, and the stopper abuts against the push-knife wrench; when the main wrench is rotated to the final position, the main wrench can contact the inner wall of the yield interval.

3. The electrosurgical instrument according to claim 1, wherein The stopper is integrally formed on a side wall of the main wrench and extends along the outer edge of the main wrench. The push-blade wrench is provided with an avoidance notch, and the curvature of the avoidance notch matches the curvature of the stopper.

4. The electrosurgical instrument according to claim 1, wherein The pliers head comprises a stationary pliers head fixed to the pliers rod and a dynamic pliers head rotatably mounted on the pliers rod. The pliers head driving assembly is transmission-connected between the main wrench and the dynamic pliers head to control the opening and closing of the pliers head.

5. The electrosurgical instrument according to claim 1, wherein, The pliers head driving assembly includes a moving part, a connecting part, a pliers head driving part and an elastic part. The moving part can move relative to the shell in a first direction, and the moving part is provided with a sliding groove extending along the first direction; the connecting part is slidably installed in the sliding groove, and the connecting part also includes a mounting portion for mounting the pliers rod; the pliers head driving part is drivingly connected between the moving part and the main wrench to drive the moving part to move along the first direction; the elastic part is installed in the sliding groove and is sleeved on the periphery of the connecting part, and the elastic part abuts between the connecting part and the groove wall of the sliding groove.

6. The electrosurgical instrument according to claim 5, characterized in that, The moving member includes an open position, a closed position and a clamping position sequentially arranged relative to the housing, and the connecting member includes a first position and a second position sequentially arranged relative to the housing; Wherein, when the movable part is in the open position, the connecting part is in the first position, and the pliers head is open; when the movable part is switched to the closed position, the connecting part is switched to the second position, and the pliers head is closed; when the movable part is switched to the clamping position, the connecting part is still in the second position, and the elastic part is compressed and exerts pressure on the pliers head, so that the pliers head is clamped.

7. The electrosurgical instrument according to claim 5, wherein The connecting member includes a pull rod, a fixing sleeve and a convex rib. Along the first direction, the pull rod is slidably installed in the sliding groove. The convex rib and the installation part are arranged at opposite ends of the pull rod. The fixing sleeve is sleeved on the pull rod and connected to the moving member. The elastic sleeve is sleeved on the periphery of the pull rod and abuts between the convex rib and the fixing sleeve.

8. The electrosurgical instrument according to claim 5, wherein The jaw driving member includes a connecting portion and a connecting rod. The main wrench includes a fixed end and a swinging end arranged at intervals. The fixed end is rotatably installed on the housing. The swinging end can swing around the fixed end. The connecting portion is connected to the moving member. The connecting rod is rotatably connected between the swinging end and the connecting portion.

9. The electrosurgical instrument according to claim 1, wherein, The blade driving assembly includes a tool bar, a sliding member and a blade driving member. The tool bar extends along the first direction and is drivingly connected to the blade assembly. The sliding member is drivingly connected to the tool bar and can move along the first direction. The blade driving member is drivingly connected to the sliding member to drive the sliding member to move along the first direction.

10. The electrosurgical instrument according to claim 9, wherein, The sliding member includes two detachable sliding parts. A sliding channel for the tool bar to pass through is formed between the two sliding parts. The tool bar is arranged in the sliding channel along the first direction and fixed to the sliding member.

11. The electrosurgical instrument according to claim 9, wherein The blade driving member includes a transmission gear set and a rack portion. The push knife wrench is provided with a receiving groove. The rack portion is formed on the groove wall of the receiving groove. The transmission gear set is drivingly connected between the sliding member and the rack portion and at least partially received in the receiving groove.

12. The electrosurgical instrument according to claim 11, wherein The transmission gear set includes a sliding rack, a first gear and a second gear. The sliding rack is fixed to the sliding member and extends along the first direction. The first gear is arranged in the receiving groove and meshes with the rack portion. The second gear is coaxially fixed to the first gear and meshes with the sliding rack.

13. The electrosurgical instrument according to claim 1, wherein, The housing is provided with an installation groove extending along the second direction. The handle further includes a guide rail installed on the main wrench and a locking assembly rotatably installed on the housing. The guide rail includes an introduction area, a locking area and a derivation area arranged in sequence. The locking assembly is at least partially received in the installation groove. The locking assembly can slide along the guide rail between the introduction area, the locking area and the derivation area. An included angle exists between the second direction and the first direction.

14. The electrosurgical instrument according to claim 13, wherein The locking assembly includes a rotation stopping piece and two reset members. The reset members are arranged at intervals along the second direction in the installation groove and connected to the groove wall of the installation groove. The reset members are configured to be able to expand and contract along the second direction. One end of the rotation stopping piece is rotatably installed on the housing and is located between the two reset members. The other side is slidably connected to the guide rail.

15. The electrosurgical instrument according to claim 14, wherein, A first protrusion is provided on one side of the rotation stopping piece facing the housing. The first protrusion is installed between the two reset members and is movably installed in the installation groove. A second protrusion is provided on one side of the rotation stopping piece facing the main wrench. The second protrusion can slide along the guide rail between the introduction area, the locking area and the derivation area.

16. The electrosurgical instrument according to any one of claims 1-15, characterized in that, The electrosurgical instrument further includes a rotating member, which is connected to the forceps rod and drives the forceps head to rotate axially.

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