Blade driving structure and high-frequency operation electrode

Abstract

The invention relates to a blade driving structure and a high-frequency operation electrode, and is applied to the field of electrosurgical operation instruments. The blade driving structure comprises a sliding block, a driving assembly, a cutter bar and a cutter bar connecting piece. The sliding block is arranged on the support in a sliding mode. The driving assembly is connected to the sliding block and used for driving the sliding block to reciprocate. The far end of the cutter bar is used for mounting the blade; the cutter bar connecting piece is used for connecting the sliding block to the near end of the cutter bar; when the driving assembly moves relative to the support, the sliding block is driven by the driving assembly to move, and the near end of the cutter bar is driven to move at the same time. The slide block is reliably connected with the near end of the cutter bar, so that the slide block can actively pull the cutter bar to synchronously return during resetting movement, the problem of blade resetting failure caused by tissue residual resistance is solved, and the operation safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrosurgical instruments, and particularly relates to a blade driving structure and a high-frequency surgical electrode. BACKGROUND

[0002] In a high-frequency surgical electrode, especially a bipolar electrocoagulation forceps with both coagulation and cutting functions, a cutting assembly is a core component for realizing the function of separating tissues. The cutting assembly generally comprises a knife rod movable forward and backward and a blade installed at the front end of the knife rod. After clamping and coagulating the target tissue by the forceps head, the operator drives the blade trigger on the driving handle to make the knife rod drive the blade to extend into a preset knife slot in the forceps head, thereby cutting off the coagulated tissue and completing the surgical operation.

[0003] In the related art, the reset of the knife rod usually depends on the elastic force of a reset member arranged inside the forceps rod. However, in the actual surgical process, blood, fat and other human tissues are easily left or adhered to the blade and the forceps head, and these residues will hinder the movement of the blade in the knife slot. When the resistance exceeds the elastic force of the reset member, the knife rod cannot be completely reset to the safe position, resulting in the failure of the blade reset. SUMMARY

[0004] Therefore, it is necessary to provide a blade driving structure and a high-frequency surgical electrode to solve the problem that the blade reset fails due to the dependence on spring reset in the existing high-frequency surgical electrode.

[0005] In a first aspect, the present application provides a blade driving structure, which adopts the following technical scheme:

[0006] A blade driving structure applied to a high-frequency surgical electrode, comprising: a sliding block, a driving assembly, a knife rod and a knife rod connecting member, the sliding block is slidably arranged on a support of the high-frequency surgical electrode; the driving assembly is connected to the sliding block, and the driving assembly is used to drive the sliding block to reciprocate; the distal end of the knife rod is used for installing a blade; the knife rod connecting member is used to connect the sliding block to the knife rod; wherein when the driving assembly drives the sliding block to slide along the support, the sliding block drives the knife rod to move through the knife rod connecting member.

[0007] In one of the embodiments, the knife rod connecting member comprises a connecting rod and a connecting head, one end of the connecting rod is connected to the sliding block, and the connecting head is connected between the proximal end of the knife rod and the other end of the connecting rod.

[0008] In one of the embodiments, the knife rod connecting member further comprises a locking rod and a locking head, one end of the locking rod is arranged in the sliding block and connected to the other end of the connecting rod away from the knife rod, and the other end is fixed to the sliding block by means of the locking head.

[0009] In one of the embodiments, the locking rod comprises a first connecting portion, a limiting portion and a second connecting portion connected in sequence along the axial direction, the first connecting portion is connected to the connecting rod, and the second connecting portion is connected to the locking head; in the radial direction of the locking rod, the size of the connecting portion is configured to be smaller than the size of the limiting portion.

[0010] In one of the embodiments, the driving assembly comprises a blade trigger and a connecting rod, the blade trigger is rotatably arranged on the support, and the two ends of the connecting rod are rotatably connected to the blade trigger and the sliding block, respectively.

[0011] In the second aspect, the application provides a high-frequency surgical electrode, which adopts the following technical scheme:

[0012] A high-frequency surgical electrode comprises a handle and a clamp rod assembly, the handle is internally provided with a support and the above-mentioned blade driving structure, the blade driving structure is mounted on the support; the clamp rod assembly is detachably mounted on the handle, the clamp rod assembly comprises an inner tube and an outer tube, the blade rod, the inner tube and the outer tube are sequentially sleeved from inside to outside, the proximal end of the blade rod is drivingly connected to the sliding block through the blade rod connecting piece and can slide relative to the inner tube under the driving of the sliding block.

[0013] In one of the embodiments, the handle further comprises a fixing seat and a fixing sleeve, the fixing seat is mounted on the support, and the proximal end of the inner tube is connected to the fixing seat through the fixing sleeve.

[0014] In one of the embodiments, the handle further comprises a rotating seat, a sleeve and a locking piece, the rotating seat is rotatably connected to the support, the sleeve is slidably connected to the support, the sleeve is synchronously rotated with the rotating seat through the locking piece, and the outer tube can be synchronously moved with the sleeve through the locking piece.

[0015] In one of the embodiments, the locking piece comprises a telescopic lock core, a locking hole is formed in the tube wall of the outer tube corresponding to the lock core, and when the lock core is clamped into the locking hole, the sleeve and the outer tube are locked.

[0016] In one of the embodiments, the clamp rod assembly further comprises an insulating sleeve, and the insulating sleeve is arranged on the outer sidewall of the outer tube.

[0017] The above-mentioned blade driving structure reliably connects the sliding block and the proximal end of the blade rod, so that the sliding block can actively pull the blade rod to return synchronously when the sliding block is in the reset movement, thereby overcoming the problem of blade reset failure caused by residual tissue resistance and improving the surgical safety. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A cross-sectional view of a high-frequency surgical electrode according to an embodiment of the present application.

[0019] Figure 2 A schematic view of a blade driving structure and a forceps rod assembly according to an embodiment of the present application.

[0020] Figure 3 An exploded view of a blade driving structure and a forceps rod assembly according to an embodiment of the present application.

[0021] Figure 4 A cross-sectional view of a forceps rod assembly according to an embodiment of the present application. Figure 2 A schematic view of a forceps rod assembly after a rotating seat is removed.

[0022] Figure 5 A partial view of a forceps rod assembly and a handle after assembly according to an embodiment of the present application.

[0023] Figure 6 A partial view of a forceps rod assembly and a handle after assembly according to an embodiment of the present application. Figure 1 An enlarged view of portion A.

[0024] Figure 7 An enlarged view of portion B. Figure 1 An enlarged view of portion B.

[0025] Figure 8 An enlarged view of portion C. Figure 1 An enlarged view of portion C.

[0026] Figure 9 A cross-sectional view of a forceps rod assembly and a rotating seat from another perspective according to an embodiment of the present application.

[0027] BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 1. slider; 11. accommodating hole; 2. driving assembly; 21. blade trigger; 22. connecting rod; 3. blade rod connecting piece; 31. connecting rod; 32. connecting head; 321. step portion; 33. locking rod; 331. first connecting portion; 332. limiting portion; 333. second connecting portion; 34. locking head; 4. forceps rod assembly; 41. inner tube; 42. outer tube; 421. locking hole; 5. handle; 51. fixed seat; 511. fixed hole; 52. fixed sleeve; 53. rotating seat; 531. pressing portion; 5311. sliding groove; 54. sleeve; 541. driven portion; 55. locking piece; 551. locking seat; 552. lock core; 553. reset portion; 56. insulating sleeve; 57. coil spring; 58. adjusting nut; 59. adjusting sleeve; 5. forceps head assembly; 6. forceps head trigger; 61. actuating portion; 7. blade; 8. blade rod; 9. blade head seat. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0030] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0032] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless specifically stated and limited otherwise, if there is a description of a first feature "on" or "under" a second feature, etc., it can mean 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 "on", "above" and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0034] If an element is referred to as being "fixed" or "attached" to another element, it can be directly on the other element or there can be an intervening element. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions as used herein are for illustrative purposes only and are not meant to be limiting.

[0035] It is still to be noted that the proximal end refers to the end of the instrument or component close to the operator, and the distal end refers to the end of the instrument or component away from the operator; the axial direction refers to the direction parallel to the center line of the distal end and the proximal end of the instrument or component, the radial direction refers to the direction perpendicular to the axial direction, and the circumferential direction refers to the direction around the axial direction.

[0036] In a high-frequency surgical electrode, especially a bipolar electrocoagulation forceps with both coagulation and cutting functions, the cutting assembly is the core component to realize the function of separating tissues. The cutting assembly usually includes a knife rod that can move forward and backward, and a knife blade installed at the front end of the knife rod. Its function is that after the target tissue is clamped and coagulated by the forceps head, the surgeon drives the knife blade trigger on the handle to make the knife rod drive the knife blade to extend forward into the preset knife slot in the forceps head, so as to accurately cut off the coagulated tissue and complete the surgical operation.

[0037] In the related art, the end of the knife rod of the cutting assembly abuts against a slider that can slide in the handle, rather than being fixedly connected. When the knife blade trigger is cocked, the trigger drives the slider to move towards the front end of the high-frequency surgical electrode (i.e. away from the handle) through a connecting rod mechanism. The slider pushes the knife rod abutting against it during the movement, thereby driving the knife blade to extend forward. After the cutting is completed, the surgeon releases the knife blade trigger, and the knife blade trigger is reset under the action of its own reset mechanism (such as a torsional spring), and drives the connecting rod and the slider to reset backward.

[0038] However, in this process, the reset of the blade rod is not actively pulled back by the slider, but relies on the elastic force provided by a reset spring installed inside the pliers rod. The spring is compressed when the blade rod moves forward, and pushes the blade rod back to reset after the trigger is released, so that the blade is retracted inside the pliers rod.

[0039] However, in electrosurgery, especially when cutting tissue, the blade and pliers head area are prone to residual or sticky blood, fat and other human tissues. These residues can penetrate and solidify in the blade groove of the pliers head, exerting frictional resistance on the blade and even causing the blade to jam.

[0040] When the elastic force of the reset spring cannot overcome this resistance, the blade rod cannot be fully reset, causing the blade to be partially or completely exposed outside the pliers head. At this time, if the operator does not notice this abnormal state and directly opens the pliers head to move the instrument, the exposed sharp blade can easily accidentally cut the surrounding healthy blood vessels or tissues, posing a safety hazard.

[0041] Based on this technical problem, the present application proposes an improved blade driving structure. The following will be described in detail in combination with the accompanying drawings Figures 1-9 Further detailed description of the embodiments of the present application.

[0042] Reference is made to Figure 1 , Figure 2 and Figure 3 , Figure 1 shows a cross-sectional view of a high-frequency surgical electrode in an embodiment of the present application, Figure 2 shows a schematic view of a blade driving structure and a pliers rod assembly in an embodiment of the present application, Figure 3 shows an exploded view of a blade driving structure and a pliers rod assembly in an embodiment of the present application.

[0043] An embodiment of the present application provides a blade driving structure, which comprises a slider 1 provided on a support of a high-frequency surgical electrode, a driving assembly 2, a blade rod 8 and a blade rod connecting piece 3. The slider 1 is slidably arranged in the support (not shown) and can move back and forth in a straight line in the guide rail or sliding groove of the support. The driving assembly 2 is connected to the slider 1 and is used to drive the slider 1 to move back and forth. The blade rod connecting piece 3 is used to connect the slider 1 to the proximal end of the blade rod 8, so that the blade rod 8 can be connected to the driving assembly 2 through the slider 1, and the distal end of the blade rod 8 is provided with a blade head seat 9 for mounting the blade 7.

[0044] In actual work process, when the driving assembly 2 moves relative to the support, the slider 1 moves under the driving of the driving assembly 2 and simultaneously drives the proximal end of the blade rod 8 to move. This connection mode ensures that the movement of the blade rod 8 is synchronized with the movement of the slider 1, whether it is forward cutting or backward resetting, the blade rod 8 can obtain reliable driving force, thereby improving the use safety of the blade 7 mounted at the distal end of the blade rod 8.

[0045] It is understood that the specific structure of the tool holder connector 3 in this application can take many forms, as long as a reliable connection between the tool holder 8 and the slider 1 can be achieved. It is not limited to a fixed connection or a detachable connection. From the perspective of easy disassembly and assembly, a detachable connection is preferred.

[0046] Combination Figure 3 , Figure 4 and Figure 5 As shown, Figure 4 It shows Figure 2 A schematic diagram of the middle clamp rod assembly after the rotating base has been removed. Figure 5 A partial schematic diagram of the clamping rod assembly and handle after assembly is shown in one embodiment of this application.

[0047] In some embodiments, the tool holder connector 3 includes a connecting rod 31 and a connector 32. One end of the connecting rod 31 is connected to the slider 1, and the connector 32 is connected between the proximal end of the tool holder 8 and the other end of the connecting rod 31, so as to achieve an effective connection between the slider 1 and the tool holder 8, and at the same time provide convenience for subsequent disassembly and maintenance.

[0048] To further improve the reliability and stability of the connection, the tool holder connector 3 also includes a locking rod 33 and a locking head 34. One end of the locking rod 33 passes through the slider 1 and is connected to the end of the connecting rod 31 away from the tool holder 8, while the other end is fixed to the slider 1 by means of the locking head 34. This locking structure can effectively prevent the connection from loosening during surgery and ensure the reliability of the transmission effect.

[0049] Specifically, along the longitudinal direction of the locking rod 33, the locking rod 33 includes a first connecting part 331, a limiting part 332, and a second connecting part 333 connected in sequence. The first connecting part 331 is connected to the connecting rod 31, and the second connecting part 333 is connected to the locking head 34. In the radial direction of the locking rod 33, the dimensions of both the first connecting part 331 and the second connecting part 333 are constructed to be smaller than the dimension of the limiting part 332. The slider 1 has a receiving hole 11, which is constructed as a two-section structure. The inner diameter of the end near the distal end is larger, which can accommodate the end of the connecting rod 31, and the inner diameter of the section near the proximal end is smaller, forming a stepped structure. After the locking rod 33 is assembled into the slider 1, the limiting part 332 can abut against the stepped structure in the axial direction of the locking rod 33.

[0050] That is, in this embodiment of the application, the locking rod 33 is constructed as a cross-shaped structure in the longitudinal section. This stepped structure formed by the difference in size can effectively limit the locking rod 33 in the longitudinal direction and prevent the locking rod 33 from abnormally moving within the slider 1 after being locked to the slider 1 by the locking head 34.

[0051] Combination Figure 1 ,Figure 6 and Figure 7 as shown in Figure 6 an enlarged view of part A in Figure 1 is shown, Figure 7 an enlarged view of part B in Figure 1 is shown.

[0052] In the embodiment, the distal end of the connecting rod 31 is provided with a first thread, the proximal end of the blade rod 8 is provided with a second thread matched with the first thread, and the distal end of the connecting rod 31 and the proximal end of the blade rod 8 are threadedly connected to achieve detachable connection. The connector 32 is specifically a nut sleeved on the periphery of the connecting rod 31 and threadedly connected with the connecting rod 31. The connector 32 is formed with a stepped portion 321 on the periphery of the connecting rod 31. After the blade rod 8 and the connecting rod 31 are assembled in place, the proximal end of the blade rod 8 is arranged in abutment with the stepped portion 321 to ensure the connection stability of the blade rod 8 and the connecting rod 31.

[0053] The locking rod 33 is specifically a threaded rod provided with threads on both ends, specifically, the outer threads are arranged on the outer side surfaces of the first connecting portion 331 and the second connecting portion 333 of the locking rod 33. The proximal end of the connecting rod 31 is provided with an inner thread for threadedly connecting the first connecting portion 331. The locking head 34 is specifically a nut sleeved on the periphery of the second connecting portion 333 and threadedly connected with the second connecting portion 333. After the locking rod 33 and the connecting rod 31 are assembled in place, the locking head 34 is threadedly connected with the locking rod 33, and the locking head 34 and the sliding block 1 are arranged in abutment with each other in the axial direction, so that the limiting portion 332 and the sliding block 1 are clamped with each other, thereby achieving the relative fixation of the detachable connection between the blade rod 8 and the sliding block 1.

[0054] Referring to Figure 1 shown, in some embodiments, the driving assembly 2 includes a blade trigger 21 and a connecting rod 22. The blade trigger 21 is rotatably arranged on the bracket. The two ends of the connecting rod 22 are respectively rotatably connected with the blade trigger 21 and the sliding block 1, specifically, hinged or pivoted, to convert the rotary motion of the blade trigger 21 into the linear motion of the sliding block 1.

[0055] Specifically, in the actual operation process, when the operator pulls the blade trigger 21, the blade trigger 21 drives the sliding block 1 to move to the distal end through the connecting rod 22. The sliding block 1 pushes the blade rod 8 to move to the distal end synchronously through the blade rod connecting piece 3, so that the blade 7 is extended from the forceps head to complete the cutting action.

[0056] When the blade trigger 21 is released, the sliding block 1 moves to the proximal end under the action of the blade trigger 21 reset mechanism (not shown), and actively pulls the blade rod 8 to reset synchronously through the blade rod connecting piece 3, so that the blade 7 is retreated to the safe position, thereby effectively overcoming the reset failure problem that may occur in the traditional spring reset.

[0057] Referring to Figures 1 to 8 shown,Figure 8 An enlarged view of part C is shown. Figure 1 In some embodiments, the application further provides a high-frequency surgical electrode, which comprises a handle 5 and a clamp rod assembly 4. The handle 5 is provided with a bracket and a blade driving structure as shown in any of the above embodiments, and the blade driving structure is mounted to the bracket. The proximal end of the clamp rod assembly 4 is detachably mounted to the handle 5, and the distal end of the clamp rod assembly 4 is used to mount a clamp head assembly 5. Such detachable design provides convenience for maintenance and component replacement of the high-frequency surgical electrode.

[0058] Referring to Figure 8 As shown, the clamp rod assembly 4 comprises an inner tube 41 and an outer tube 42 which are sequentially sleeved on the outer periphery of the blade rod 8 from inside to outside. The proximal end of the inner tube 41 is detachably connected to the bracket to achieve relative fixation with the bracket. Specifically, the blade rod 8 is arranged in the inner tube 41 of the clamp rod assembly 4 and can axially slide in the inner tube 41. The inner tube 41 is sleeved on the outer portion of the blade rod 8 to provide guidance and protection for the blade rod 8. The outer tube 42 is sleeved on the outer portion of the inner tube 41 and can slide on the surface of the inner tube 41. The proximal end of the blade rod 8 is drivingly connected to the sliding block 1 by means of the blade rod connecting piece 3 and can slide relative to the inner tube 41 under the driving of the sliding block 1, so that the blade rod 8 can obtain stable and reliable motion control.

[0059] Referring to Figure 5 , Figure 8 and Figure 9 As shown, in some embodiments, the handle 5 further comprises a fixing seat 51 and a fixing sleeve 52, the fixing seat 51 is mounted to the bracket, and the proximal end of the inner tube 41 is connected to the fixing seat 51 by means of the fixing sleeve 52. Such fixing structure realizes reliable connection between the inner tube 41 and the handle 5, and ensures that the inner tube 41 maintains a stable position during the operation. Various fixing modes such as interference fit, threaded connection or buckle connection can be adopted between the fixing sleeve 52 and the inner tube 41.

[0060] In the embodiment of the application, the fixing sleeve 52 and the inner tube 41 are fixedly connected by means of a drum spring 57. Specifically, the fixing seat 51 has a hollow fixing hole 511, and the drum spring 57 is arranged in the fixing hole 511. After the clamp rod assembly 4 is mounted in place, the fixing sleeve 52 is inserted into the fixing hole 511, and the drum spring 57 is located between the outer side wall of the fixing sleeve 52 and the inner side wall of the fixing hole 511, thereby improving the sliding resistance of the fixing sleeve 52 relative to the fixing hole 511 and achieving preliminary fixation.

[0061] To improve the fixing effect, an adjusting nut 58 can be provided on the fixing base 51. After the clamp rod assembly 4 is installed in place, the adjusting nut 58 can be tightened to lock the fixing sleeve 52. Furthermore, in some embodiments, to prevent damage to the clamp rod assembly 4, an adjusting sleeve 59 can be provided between the adjusting nut 58 and the fixing sleeve 52. The adjusting sleeve 59 can be made of a flexible material with toughness such as rubber or silicone, or it can be made of metal. This application does not limit the choice of material.

[0062] Continue reading Figure 8 and Figure 9 As shown, in some embodiments, the handle 5 of the high-frequency surgical electrode further includes a rotating base 53, a sleeve 54, and a locking member 55, with the locking member 55 installed within the rotating base 53. The rotating base 53 is rotatably connected to the support, and the sleeve 54 is engaged with the locking member 55 to achieve synchronous rotation, and the sleeve 54 is movable relative to the rotating base 53 along the axial direction. The sleeve 54 is slidably connected to the support, the locking member 55 is located at the distal end of the sleeve 54, and a driven part 541 is provided at the proximal end of the sleeve 54, which is linked to the actuating part 61 of the forceps trigger 6.

[0063] After the clamp bar assembly 4 is installed, the outer tube 42 and the sleeve 54 are locked by the locking member 55. At this time, when the clamp bar trigger is pulled, its actuating part 61 can drive the sleeve 54 to move relative to the bracket through the driven part 541, thereby driving the outer tube 42 to move relative to the inner tube 41, so as to drive the clamp head to open and close.

[0064] It is understandable that the specific structure of the locking element 55 can take various forms, as long as it can achieve the switching between locking and releasing the clamping rod assembly 4. In this embodiment, the locking element 55 includes a retractable lock cylinder 552, and the wall of the outer tube 42 has a locking hole 421 corresponding to the lock cylinder 552. When the lock cylinder 552 is engaged in the locking hole 421, the sleeve 54 and the outer tube 42 are locked. At this time, the outer tube 42 can move with the movement of the sleeve 54, and the entire clamping rod assembly 4 can rotate synchronously with the rotation of the sleeve 54. The retractable movement of the lock cylinder 552 can be achieved by a spring, an electromagnet, or other driving methods.

[0065] by Figure 9 As shown in the example, the rotating base 53 includes a push part 531, in which a sliding groove 5311 is provided, and at least part of the lock cylinder 552 of the locking member 55 is accommodated in the sliding groove 5311. The locking member 55 also includes a locking seat 551 and a reset part 553, which may specifically be a spring for the lock cylinder 552.

[0066] The locking seat 551 is fixed to the outer wall of the sleeve 54 and is configured as a hollow mechanism. One end of the lock core 552 passes through the locking seat 551 and is in transmission cooperation with the pressing part 531. The other end of the lock core 552 extends below the pincer lever assembly 4 and can be bent upward to form a "fishhook" structure. The pipe wall of the outer pipe 42 is provided with a locking hole 421 for inserting the lock core 552 at the corresponding position of the lock core 552. The reset part 553 abuts between the locking seat 551 and the lock core 552, so that the lock core 552 always has the tendency to insert into the locking hole 421 under the elastic force of the reset part.

[0067] When the pincer lever assembly 4 is installed, the pressing part 531 is pressed to drive the lock core 552 to move downward, and the spring of the lock core 552 is compressed. The proximal end of the pincer lever assembly 4 is inserted into the distal end of the sleeve 54. When the insertion is completed, the lower end of the lock core 552 corresponds to the position of the locking hole 421. The pressing part 531 is released, and the lock core 552 moves upward under the reset force of the reset part, and the bottom end of the lock core 552 is inserted into the locking hole 421 of the outer pipe 42, thereby completing the locking of the sleeve 54 and the outer pipe 42.

[0068] In some other embodiments, a reset spring (not shown) is sleeved on the knife lever 8. One end of the reset spring abuts against the knife lever 8, and the other end abuts against the inner wall of the inner pipe 41. When the knife lever 8 is installed inside the inner pipe 41, the reset spring has a tendency to push the knife lever 8 toward the proximal end, so as to cooperate with the sliding block 1 to reset the knife lever 8.

[0069] During the operation, when the operator pulls the blade trigger 21, the blade trigger 21 drives the sliding block 1 to move toward the distal end through the connecting rod 22. The sliding block 1 pushes the knife lever 8 to move toward the distal end through the connecting rod 31, and the reset spring is compressed. When the blade trigger 21 is released, the sliding block 1, the connecting rod 31 and the knife lever 8 move synchronously toward the proximal end under the joint action of the reset spring and the blade driving structure, and the reset is completed. This active pulling reset mechanism effectively overcomes the reset failure problem that may occur when the reset of the knife lever 8 is only dependent on the spring.

[0070] In some embodiments, an insulating sleeve 56 is further provided on the outer pipe 42. The insulating sleeve 56 can be sleeved on the outer pipe 42 by thermoplastic method, so as to realize the insulation treatment of the pincer lever assembly 4.

[0071] During the assembly of the pincer lever assembly 4, the cooperation relationship between the knife lever 8 and the inner pipe 41 needs to be accurately controlled. The knife lever 8 can smoothly slide in the inner pipe 41 under the action of external force, while maintaining a proper cooperation gap, which cannot be too tight to affect the movement flexibility, nor too loose to cause the movement precision to decrease. The cooperation between the inner pipe 41 and the outer pipe 42 also needs to be accurately controlled, so as to ensure that the outer pipe 42 can smoothly realize the axial movement under the action of the driving force.

[0072] Further, the disassembly process of the clamp rod assembly 4 needs to be simple and fast. When the blade 7 needs to be replaced or cleaned and maintained, the operator first loosens the locking head 34, so that the locking rod 33 is separated from the connecting rod 31. Then press the pressing part 531 of the rotating seat 53, so that the lock core 552 is disengaged from the locking hole 421, that is, the lock core 552 is withdrawn from the locking hole 421 of the outer tube 42, and the locking relationship between the sleeve 54 and the outer tube 42 is released. Then pull out the clamp rod assembly 4 from the fixing seat 51, overcome the resistance of the drum spring 57 of the fixing seat 51, take off the clamp rod assembly 4 from the bracket, then unscrew the connecting head 32, and take out the blade rod 8 from the inner tube 41 to replace the blade 7. After the maintenance is completed, press the pressing part 531 of the rotating seat 53, insert the clamp rod assembly 4 into the bracket, when it is inserted in place, loosen the pressing part 531, and the lock core 552 is locked with the locking hole 421. Finally, tighten the locking head 34 to complete the assembly process. The whole disassembly process does not need to use special tools, which improves the maintenance efficiency.

[0073] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered within the scope of the present disclosure.

[0074] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A blade driving structure for use in high-frequency surgical electrodes, characterized in that, The blade drive structure includes: A slider is slidably mounted on the support of the high-frequency surgical electrode; A drive assembly, connected to the slider, is used to drive the slider to reciprocate. A tool holder, the distal end of which is used for mounting a cutting blade; and A tool holder connector is used to connect the slider to the tool holder; When the driving component drives the slider to slide along the bracket, the slider drives the tool bar to move through the tool bar connector.

2. The blade driving structure according to claim 1, characterized in that, The tool holder connector includes a connecting rod and a connecting head. One end of the connecting rod is connected to the slider, and the connecting head is connected between the proximal end of the tool holder and the other end of the connecting rod.

3. The blade driving structure according to claim 2, characterized in that, The tool holder connector also includes a locking rod and a locking head. One end of the locking rod passes through the slider and is connected to the end of the connecting rod away from the tool holder, while the other end is fixed to the slider by means of the locking head.

4. The blade driving structure according to claim 3, characterized in that, The locking rod includes a first connecting part, a limiting part, and a second connecting part connected sequentially along the axial direction. The first connecting part is connected to the connecting rod, and the second connecting part is connected to the locking head. In the radial direction of the locking rod, the size of the connecting part is configured to be smaller than the size of the limiting part.

5. The blade driving structure according to claim 1, characterized in that, The drive assembly includes a blade trigger and a connecting rod. The blade trigger is rotatably mounted on the bracket, and the two ends of the connecting rod are rotatably connected to the blade trigger and the slider, respectively.

6. A high-frequency surgical electrode, characterized in that, include: The handle has a built-in bracket and a blade drive structure as described in any one of claims 1-5, wherein the blade drive structure is mounted on the bracket. and A clamp bar assembly is detachably mounted on the handle. The clamp bar assembly includes an inner tube and an outer tube. The blade bar, the inner tube, and the outer tube are sequentially sleeved from the inside out. The proximal end of the blade bar is connected to the slider via the blade bar connector and can slide relative to the inner tube under the action of the slider.

7. The high-frequency surgical electrode according to claim 6, characterized in that, The handle also includes a fixing seat and a fixing sleeve. The fixing seat is mounted on the bracket, and the proximal end of the inner tube is connected to the fixing seat via the fixing sleeve.

8. The high-frequency surgical electrode according to claim 6, characterized in that, The handle also includes a rotating seat, a sleeve, and a locking element. The rotating seat is rotatably connected to the bracket, and the sleeve is slidably connected to the bracket. The sleeve rotates synchronously with the rotating seat by means of the locking element, and the outer tube moves synchronously with the sleeve by means of the locking element.

9. The high-frequency surgical electrode according to claim 8, characterized in that, The locking component includes a retractable lock cylinder, and the outer tube has a locking hole corresponding to the lock cylinder. When the lock cylinder is engaged in the locking hole, the sleeve and the outer tube are locked together.

10. The high-frequency surgical electrode according to claim 6, characterized in that, The clamp assembly also includes an insulating sleeve disposed on the outer side wall of the outer tube.

Images