Flushing and sucking low-power multifunctional high-frequency electrotome with bendable functional rod and cutting function

Abstract

The invention relates to the field of medical instruments, in particular to a flushing and sucking low-power multifunctional high-frequency electrotome with a bendable functional rod and a cutting function, which comprises an electrocoagulation cutting hook, a hollow functional rod, a through-flow bendable assembly, a bidirectional transmission mechanism and a rotating wheel, the electrocoagulation cutting hook is arranged at the end of the electrode tube, and the through-flow bendable assembly is connected between the two pipelines. The rotating wheel drives the bidirectional bending transmission gear set and drives the bidirectional bending control traction wire to control the through-flow bendable assembly, bidirectional flexible bending of the function rod with the hollow interior is achieved, the electrocoagulation cutting hook can switch the hook head cutting function and the back electrocoagulation function, meanwhile, the smoke suction pipeline can suck smoke and tissue fluid in real time, the operation view is kept clear, and the operation efficiency is improved. According to the design, the functions of bidirectional bending, electrocision and electrocoagulation switching and synchronous flushing and sucking are integrated, operation is easy and convenient, and the efficiency and safety of minimally invasive surgery are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a multifunctional high-frequency electrosurgical unit with a flexible, low-power suction and cutting function. Background Technology

[0002] In the field of minimally invasive surgery, high-frequency electrosurgical units are core instruments for tissue cutting and hemostasis, and their functional adaptability directly affects surgical efficiency and safety. Traditional high-frequency electrosurgical units mostly have rigid rods, and although some improved products have bending capabilities, they can only bend in one direction, and their core function is limited to hooking tissue with the electrocoagulation cutting hook and completing the electrosurgical cutting operation.

[0003] Because these types of electrosurgical units cannot bend flexibly to both sides, the back of the electrocoagulation and cutting hook cannot effectively target the target tissue. This necessitates the use of additional instruments or adjustments to the surgical position for procedures such as cauterization and hemostasis. This not only increases the complexity and time cost of the surgical procedure but also increases the risk of tissue damage due to frequent instrument changes or repositioning. Furthermore, existing flexible electrosurgical units generally lack integrated fumigation functions. The smoke generated during surgery can obstruct the field of vision and affect operational precision, requiring the use of a separate fumigation device, further exacerbating the risk of operational interference. In addition, the unidirectional bending structure limits the operating angle when dealing with complex anatomical sites, making it difficult to adapt to the needs of diverse surgical scenarios. Therefore, there is an urgent need for a multifunctional high-frequency electrosurgical unit with a flexible rod, combining suction and cutting capabilities. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art and provide a multi-functional high-frequency electric knife with a flexible rod that can perform punching, suction, low-power cutting.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A multi-functional high-frequency electric knife with a flexible rod, characterized by low power output and cutting capability, includes an electrocoagulation cutting hook, a hollow internal functional rod, a current-flow bendable component, a bidirectional bending angle transmission gear set, a bidirectional bending control traction wire set, and a rotating wheel. The hollow internal functional rod is divided into an electrode tube and a smoking pipe. The electrocoagulation cutting hook is fixedly installed at the end of the electrode tube, and the flow-through bendable component is connected between the smoking pipe and the electrode tube. The bidirectional bending angle transmission gear set is located at the end of the smoking pipe. One end of the bidirectional bending control traction wire set is fixedly connected to the bidirectional bending angle transmission gear set, and the other end passes through the smoking pipe and is fixedly connected to the end of the flow-through bendable component. The rotating wheel is fitted outside the smoking pipe and is fixedly connected to the bidirectional bend-angle transmission gear set.

[0006] This invention connects the smoking tube and electrode tube through a flexible flow-through component. Combined with the precise transmission of a bidirectional bending gear set and a bidirectional bending control traction wire set, it enables the functional rod to bend flexibly to both sides. This overcomes the limitations of rigid or unidirectional bending in traditional high-frequency electrosurgical units. Furthermore, the bending allows for switching the working surface of the electrocoagulation cutting hook, using the hook to retrieve electrocutted tissue and the back to electrocoagulate and stop bleeding without changing instruments or adjusting patient position. This effectively solves the problems of limited functionality and cumbersome operation of existing products. Simultaneously, the functional rod features an internal hollow design with separate electrode tubes and a smoking tube. The smoking tube can draw in smoke and tissue fluid in real time, avoiding the pain points of surgical smoke obscuring vision, harming the health of medical staff, and interference from additional smoking instruments. This comprehensively improves the efficiency, precision, and safety of minimally invasive surgery.

[0007] The bidirectional bending transmission gear set includes a driving bevel gear and two driven bevel gears. The driving bevel gear is located at the end of the smoking pipe, and the two driven bevel gears mesh with the driving bevel gear respectively. The bidirectional bending control traction wire set includes two driving traction wires. One end of each driving traction wire is fixedly connected to one of the two driven bevel gears of the bidirectional bending transmission gear set, and the other end passes through the inside of the smoking pipe and is fixedly connected to the end of the flow-through bendable component.

[0008] This invention uses an active bevel gear to drive the driven bevel gears on both sides to move synchronously in opposite directions, and then uses two drive traction wires to pull the flow-through bendable component to achieve bidirectional bending, which solves the problems of traditional transmission structures that are difficult to achieve flexible bending on both sides and insufficient angle adjustment accuracy.

[0009] Preferably, the flow-through bendable component is formed by connecting multiple snake-bone sections in series with hinges. Each snake-bone section has a tenon and a groove that are adapted to each other at both ends. Adjacent snake-bone sections are hinged by the tenon being inserted into the groove. One end of the bendable component is fixedly connected to the electrode tube, and the other end is fixedly connected to the smoking pipe; the side wall of the snake joint is provided with a threading seat, which drives the traction wire to pass through the threading seat.

[0010] This invention designs the flow-through bendable component as a structure formed by multiple sections of snake-bone joints connected in series by tenons and grooves, which enables flexible double-sided bending of the hollow functional rod. The hinge method of the tenons being embedded in the grooves can also ensure the structural connection is stable during bending, avoiding loosening or breakage, and improving the durability of the bendable component. Preferably, a sealing and fixing box is fitted onto the smoking pipe, the smoking pipe passes through the sealing and fixing box and extends outside the sealing and fixing box, the driving bevel gear is fixedly connected to the smoking pipe, two driven bevel gears are rotatably disposed between the sealing and fixing box and the smoking pipe, the part of the smoking pipe located in the sealing and fixing box has two threading holes to facilitate the passage of two driving traction wires, and the sealing and fixing box is provided with insulating material.

[0011] This invention provides stable installation support and rotation limit for the bidirectional curved transmission gear set by installing a sealing and fixing box on the smoking pipe, which fixes the driving bevel gear to the smoking pipe and rotatably sets two driven bevel gears between the sealing and fixing box and the smoking pipe. This solves the problem of transmission deviation and loosening that easily occurs when the gear set has no fixed protective structure. At the same time, the sealing and fixing box adopts a fully sealed structure design, which can effectively ensure the sealing performance of the internal air intake channel of the smoking pipe even if there is a corresponding wire hole in the smoking pipe, preventing smoke from leaking from the wire hole or the connection of the sealing and fixing box, and ensuring the stable and reliable suction effect of the air intake channel.

[0012] Preferably, the active bevel gear has a positioning groove on its side wall, the rotating wheel has a positioning connecting sleeve, and the positioning connecting sleeve has a positioning protrusion that cooperates with the positioning groove.

[0013] This invention achieves precise positioning and connection between the rotating wheel and the driving bevel gear through the engagement of the positioning protrusion and the positioning slot. This solves the problems of circumferential slippage and coaxiality deviation that easily occur during the connection between the two, ensuring that the rotational power of the rotating wheel can be transmitted to the driving bevel gear without loss, thus improving the transmission accuracy of the bidirectional bending gear set. At the same time, this engagement connection structure is easy to assemble, achieving a reliable connection without additional fasteners, reducing assembly difficulty and subsequent maintenance costs. Furthermore, the cooperation structure of the positioning slot and the positioning protrusion can form a circumferential limit on the rotating wheel and the driving bevel gear, preventing the connection from loosening during long-term transmission. This ensures that the traction action of the bidirectional bending control traction wire set corresponds precisely to the operation command of the rotating wheel, further improving the control accuracy and stability of the double-sided bending of the internal hollow functional rod.

[0014] Preferably, the hollow functional rod is further provided with a flushing pipe. One end of the flushing pipe extends to the inner wall of the electrocoagulation cutting hook and the electrode tube and is fixedly connected by a connecting rod. The other end extends into the sealed fixing box. A smoke exhaust pipe and a flushing liquid injection pipe are fixed on both sides of the sealed fixing box. The side walls of the smoke exhaust pipe and the smoke exhaust pipe are fixedly connected and communicate with each other. The flushing liquid injection pipe and the flushing pipe are fixedly connected and communicate with each other.

[0015] This invention adds a flushing pipe inside the hollow functional rod and designs a dual-path structure in which smoke suction and flushing fluid delivery are independent of each other. It can realize the simultaneous operation of flushing and smoking during surgery, and effectively solves the problems of surgical field obstruction and untimely cleaning of tissue fluid and cutting residue caused by the lack of flushing and suction function, unreasonable path design or inability to flush and suction simultaneously in traditional instruments. The connecting rod design ensures the stability of the irrigation pipe within the electrode tube while not obstructing the suction channels of the electrode tube outlet and the fumigation pipe. This ensures precise delivery of the irrigation fluid to the surgical end, and timely and smooth suction and discharge of waste fluid, surgical smoke, and tissue fluid. The integrated design of the exhaust pipe and irrigation fluid injection pipe within a sealed fixing box allows for a unified layout of the irrigation and suction interfaces and transmission protection structure. This eliminates the need for additional interfaces on the internal hollow functional rods, simplifying the overall structure. Furthermore, the sealing properties of the fixing box, combined with the sealed connection of each pipe, effectively prevent irrigation fluid leakage and smoke overflow. This ensures stable and reliable injection and suction effects in both the irrigation and fumigation pipes, achieving a high degree of integration of cutting, bending, and simultaneous irrigation and suction functions. This significantly improves the ease of operation and visual clarity of minimally invasive surgery.

[0016] Preferably, the flushing pipe includes a first rigid pipe, a flexible pipe, and a second rigid pipe connected in sequence, wherein the first rigid pipe is located inside the electrode pipe, the flexible pipe is located inside the bendable assembly, and the second rigid pipe is located inside the smoking pipe.

[0017] This invention ensures the overall support and flow stability of the flushing pipe through the rigid pipe structure inside the electrode tube and the smoking pipe, avoiding pipe collapse and blockage that would affect the delivery of flushing fluid. The flexible hose inside the bendable component can bend flexibly on both sides of the bendable component and deform synchronously, adapting to the bending action of the internal hollow functional rod. This solves the problem that traditional one-piece rigid flushing pipes cannot bend with the internal hollow functional rod and are prone to breakage or pipe sealing failure.

[0018] Meanwhile, the adaptable layout of the three-section tubing ensures that the flushing tubing maintains smooth flow and a sealed connection throughout the entire stroke of the hollow internal functional rod, ensuring that the flushing fluid can be stably and accurately delivered to the surgical end. Combined with the fumigation tubing, it enables reliable simultaneous flushing and fumigation, which not only ensures the stable realization of the synchronous flushing and aspiration function, but also improves the structural adaptability and service life of the flushing tubing, further enhancing the overall reliability of the instrument.

[0019] Preferably, a deformation-coupled variable diameter air duct mechanism is further provided between the flushing pipe and the smoke extraction pipe. The deformation-coupled variable diameter air duct mechanism includes a rotating ring, a mounting ring, adjusting blades, a fixed ring, a connecting ring, a support bar, and a rotating shaft. The outer wall of the rotating ring is fixedly connected to the inner wall of the rotating wheel. The connecting ring is fixedly connected to the rotating ring and located inside the smoke extraction pipe. The mounting ring is located inside the connecting ring. The fixed ring is located at the center of the mounting ring and is fixed to the second rigid pipe. The mounting ring and the fixed ring are fixedly connected by the support bar. The adjusting blades are arranged in a circumferential array between the mounting ring and the fixed ring. One end of the adjusting blade is rotatably connected to the fixed ring via a rotating shaft, and the other end is rotatably connected to the mounting ring via a rotating shaft. The rotating shaft and the fixed ring and the mounting ring can rotate through bearings. The connecting ring drives the adjusting blades to rotate.

[0020] This invention utilizes the rotation of a rotating wheel to drive the synchronous movement of a rotating ring and a connecting ring, which in turn drives the circumferential array of adjusting blades to rotate around the rotation axis. This enables flexible adjustment of the internal duct diameter of the smoke extraction duct, linking the diameter adjustment action with the bending control action of the rotating wheel. Based on the bending state of the internal hollow functional rod, the flow area of ​​the suction duct can be adjusted synchronously, ensuring that the suction volume of the smoke extraction duct matches the flow characteristics of the duct after the internal hollow functional rod is bent. This avoids the problem of decreased suction efficiency caused by local resistance and changes in the flow cross-section of the internal duct due to the bending of the internal hollow functional rod on both sides. It ensures that the smoke extraction duct can maintain its suction efficiency regardless of which side the internal hollow functional rod is bent to or the bending angle. Maintaining a stable and adaptable suction effect, while considering the surgical scenarios corresponding to the bending operation, when the internal hollow functional rod bends to allow the electrocoagulation cutting hook head to act on the tissue for electro-cutting, the air passage area is simultaneously increased to enhance the suction volume, quickly removing the large amount of smoke and tissue debris generated during cutting. When the internal hollow functional rod bends in the opposite direction to allow the back of the electrocoagulation cutting hook to perform scalding and hemostasis, the air passage area is simultaneously reduced to adapt to scenarios with low smoke generation, avoiding excessive suction. This ensures that the suction volume is precisely matched with the amount of surgical contamination generated under different bending operations, achieving a high degree of synergy between bending control, suction adjustment, and surgical operation, ensuring clear vision and reasonable coordination of flushing and suction in various bending operation scenarios.

[0021] A guide transmission roller is provided between the connecting ring and the mounting ring. A transmission arm is fixed on the rotating shaft at the end of each adjusting blade. A strip-shaped guide groove is provided on the transmission arm. A positioning pin is slidably provided in the strip-shaped guide groove and is fixed on the connecting ring.

[0022] This transmission structure, through mechanical linkage, ensures that all the adjusting blades of the circumferential array rotate synchronously at the same angle, guaranteeing the uniformity of the adjustment of the smoke duct diameter. This avoids problems such as turbulence and increased suction resistance caused by local blade angle deviations. During the bending process of the hollow functional rod, the airflow area of ​​the duct can change precisely and smoothly with the operation of the rotating wheel, always adapting to the bending state and the suction requirements of the corresponding surgical operation. This improves the accuracy and stability of suction and irrigation coordination in different surgical operation scenarios.

[0023] The guide transmission roller of this invention effectively reduces the rotational frictional resistance between the connecting ring and the mounting ring, making the rotation of the connecting ring smoother. Combined with the sliding guidance of the positioning pin and the strip guide groove, it avoids jamming and loosening during transmission, and improves the stability and service life of the overall transmission structure. Preferably, the hollow functional rod and the flexible flow assembly are both covered with an insulating flexible tube, the end of the smoking pipe is provided with a hexagonal retaining ring, and the end of the smoking pipe is a closed end.

[0024] This invention achieves insulation protection for the hollow functional rod and the flexible flow-through component by completely covering them with an insulating flexible tube. This not only prevents safety hazards such as leakage and short circuits during surgery, but also accommodates the double-sided bending action of the flexible flow-through component, ensuring the integrity and fit of the protective layer during bending. In addition, it provides wear resistance and leak prevention, improving the safety and durability of the instrument.

[0025] This invention features a hexagonal retaining ring at the closed end of the smoking pipe. Utilizing the hexagonal retaining ring's locking and fitting properties, it enables quick, plug-and-play connection between the device and peripherals such as handles and foot controls. This eliminates the need to replace or modify existing handles or foot controls; the entire hollow functional rod can be disassembled and replaced simply by using the hexagonal retaining ring. This significantly reduces the cost of using and maintaining the device. Furthermore, the hexagonal retaining ring's locking structure provides a stable connection, effectively preventing loosening or rotational shifting during use and ensuring the stability of the transmission and piping connections. The closed design at the end of the smoking pipe prevents leakage of smoke and waste liquid.

[0026] The smoking duct is equipped with two sealed bearings. The inner ring of the sealed bearing is fixedly connected to the smoking duct, and the outer ring of the sealed bearing is fixedly connected to the rotating ring, so that the rotating ring can rotate while ensuring the sealing performance of the smoking duct.

[0027] In summary, the beneficial effects of this invention are as follows: 1. This invention connects the smoking tube and the electrode tube through a flow-through bendable component. With the precise transmission of the bidirectional bending gear set and the bidirectional bending control traction wire set, the hollow internal functional rod can be flexibly bent to both sides. This not only solves the limitations of rigid or unidirectional bending of traditional high-frequency electrosurgical units, but also allows switching the working surface of the electrocoagulation cutting hook by bending. The hook head can be used to pick up electrocutted tissue, and the back can be used for electrocoagulation hemostasis. There is no need to change instruments or adjust the body position. This effectively solves the problems of single function and cumbersome operation of existing products. At the same time, the functional rod adopts an internal hollow design and is equipped with an electrode tube and a smoking tube. The smoking tube can draw smoke mist and tissue fluid in real time, avoiding the pain points of surgical smoke obscuring the vision, harming the health of medical staff, and interference of operation by additional smoking instruments. This comprehensively improves the efficiency, accuracy and safety of minimally invasive surgery. 2. This invention adds a flushing pipe inside the hollow functional rod and designs a dual-path structure in which smoke suction and flushing fluid delivery are independent of each other. It can realize the simultaneous operation of flushing and smoking during the operation, effectively solving the problems of obstruction of the surgical field and untimely cleaning of tissue fluid and cutting residue caused by the lack of flushing and suction function, unreasonable path design or inability to flush and suction simultaneously in traditional instruments. 3. The present invention ensures the overall support and flow stability of the flushing pipe through the rigid pipe structure in the electrode tube and the smoking pipe, avoiding the collapse and blockage of the pipe that would affect the delivery of flushing fluid. The flexible hose in the flexible component can bend flexibly on both sides of the flexible component and deform synchronously, adapting to the bending action of the internal hollow functional rod, thus solving the problem that traditional integrated rigid flushing pipes cannot bend with the internal hollow functional rod and are prone to breakage or pipe sealing failure. 4. This invention utilizes the rotation of a rotating wheel to drive the rotating ring and connecting ring to move synchronously, thereby driving the adjusting blades of the circumferential array to rotate around the rotating axis. This allows the rotating wheel to control the bending of the internal hollow functional rod while simultaneously driving the adjusting blades to change the diameter of the smoke extraction duct. As a result, the suction volume can automatically adapt to the bending state of the internal hollow functional rod and the corresponding surgical steps, ensuring a balance between clear vision and suction efficiency in different operating scenarios. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the bidirectional bend-angle transmission gear set and the flow-through bendable component of the present invention; Figure 3 This is the present invention. Figure 2 The intention to magnify point A; Figure 4 This is a three-dimensional schematic diagram of the snake bone joint of the present invention; Figure 5 This is a schematic diagram of the structure of the threading connector of the present invention; Figure 6This is a three-dimensional schematic diagram of the active bevel gear of the present invention; Figure 7 This is a schematic diagram of the hexagonal retaining ring of the present invention; Figure 8 This is a cross-sectional schematic diagram of the overall structure of the present invention; Figure 9 This is the present invention. Figure 8 The intention to magnify point B; Figure 10 This is the present invention. Figure 8 The intention to magnify point C; Figure 11 This is the present invention. Figure 9 The intention to magnify point D; Figure 12 This is a schematic diagram of the flushing pipe of the present invention installed inside the flow-through bendable component; Figure 13 This is an overall schematic diagram of the deformation-coupled variable diameter air duct mechanism of the present invention; Figure 14 This is a schematic diagram of the adjusting blades of the deformation coupling variable diameter air duct mechanism of the present invention after they are opened; Figure 15 This is a side view schematic diagram of the deformation coupling variable diameter air duct mechanism of the present invention; Figure 16 This is a schematic diagram of the mounting ring of the present invention; Markings in the diagram: 1. Electrocautery cutting hook; 2. Hollow internal functional rod; 21. Electrode tube; 22. Smoke extraction pipe; 3. Flow-through bendable assembly; 31. Snake joint; 311. Tenon; 312. Groove; 4. Bidirectional bending angle transmission gear set; 41. Driving bevel gear; 42. Driven bevel gear; 411. Positioning slot; 5. Bidirectional bending control traction wire set; 51. Drive traction wire; 6. Rotating wheel; 61. Positioning connecting bushing; 611. Positioning protrusion; 7. Wire threading seat; 8. Sealing and fixing box; 81. Smoke exhaust pipe; 82. Flushing fluid 9. Injection pipe; 91. Deformation-coupled variable diameter duct mechanism; 92. Rotating ring; 93. Mounting ring; 94. Guide transmission roller; 95. Transmission arm; 96. Strip guide groove; 97. Positioning pin; 98. Adjusting blade; 99. Sealed bearing; 90. Fixing ring; 91. Connecting ring; 92. Support bar; 93. Rotating shaft; 24. Threading hole; 25. Flushing pipe; 26. First rigid pipe; 27. Flexible hose; 28. Second rigid pipe; 29. ​​Connecting rod; 200. Insulating flexible pipe; 201. Hexagonal retaining ring. Detailed Implementation

[0029] The following specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Example:

[0032] according to Figures 1-2 As shown, a multi-functional high-frequency electrosurgical unit with a flexible, low-power suction and cutting function includes an electrocoagulation cutting hook 1, a hollow functional rod 2, a flow-through bendable assembly 3, a bidirectional bending angle transmission gear set 4, a bidirectional bending control traction wire set 5, and a rotating wheel 6. The hollow functional rod 2 is divided into an electrode tube 21 and a suction tube 22. The electrocoagulation cutting hook 1 is fixedly installed at the end of the electrode tube 21, and the flow-through bendable assembly 3 is connected between the suction tube 22 and the electrode tube 21. The bidirectional bending angle transmission gear set 4 is located at the end of the suction tube 22. One end of the bidirectional bending control traction wire set 5 is fixedly connected to the bidirectional bending angle transmission gear set 4, and the other end passes through the suction tube 22 and is fixedly connected to the end of the flow-through bendable assembly 3. The rotating wheel 6 is sleeved on the outside of the suction tube 22 and fixedly connected to the bidirectional bending angle transmission gear set 4. A light can also be installed at the front end of the electrode tube 21 to make the surgical field clear. The suction tube 22 is made of conductive metal. The end of 2 can form a precise fit with the conductive part inside the surgical handle. The conductive part adopts an elastic fit structure design, which can make close contact with the outer wall of the smoking tube 22 through elastic force, so as to realize the electrical conduction between the power supply circuit and the smoking tube 22. The electrode tube 21 is also made of metal conductive material, and it is rigidly connected and electrically connected to the smoking tube 22 through the current-passing bendable component 3. The snake bone joint of the current-passing bendable component 3 is a metal conductive structure. Adjacent snake bone joints are hinged by tenons and grooves, which not only ensures the realization of the bending function, but also forms a stable electrical conduction path. This allows the high-frequency current input by the conductive part inside the handle to be transmitted to the electrode tube 21 through the smoking tube 22 and the current-passing bendable component 3 in sequence, and finally to the electrocoagulation cutting hook 1 at the end, so as to realize the electrocoagulation cutting hook 1 to perform electrocutting and electrocoagulation functions on tissue, as described in patent CN120918779A_A bendable and integrated smoking function minimally invasive surgical electric hook.

[0033] according to Figure 3As shown, the bidirectional bending angle transmission gear set 4 includes a driving bevel gear 41 and two driven bevel gears 42. The driving bevel gear 41 is located at the end of the smoking pipe 22, and the two driven bevel gears 42 mesh with the driving bevel gear 41 respectively. The bidirectional bending control traction wire set 5 includes two driving traction wires 51. One end of each driving traction wire 51 is fixedly connected to the two driven bevel gears 42 of the bidirectional bending angle transmission gear set 4, and the other end passes through the inside of the smoking pipe 22 and is fixedly connected to the end of the flow-through bendable component 3. The bidirectional transmission structure makes the bending angle adjustment more stable and less prone to wear and jamming. The adaptation design of the flow-through bendable component and the smoking pipe ensures that the smoke passage is unobstructed when bending. On the other hand, the gear meshing transmission has high transmission efficiency and stability. The strong advantage, combined with the independent drive of two traction wires, avoids the wear, jamming, or weak traction that are prone to occur in a single traction structure. It ensures reliable transmission of the hollow functional rod 2 during repeated double-sided bending. At the same time, the two drive traction wires 51 pass through the smoke extraction tube and are fixed to the flow-through bendable component without occupying extra space or affecting the smoothness of the smoke extraction channel. This ensures the smooth realization of the double-sided bending function and also takes into account the stability of smoke removal, further improving the convenience and safety of surgical operations. An annular groove is made on the toothless shaft wall of the driven bevel gear 42 for the drive traction wire 51 to be wound around. The orderly winding and release of the drive traction wire 51 is achieved by the rotation of the driven bevel gear 42, ensuring the smoothness of the traction transmission.

[0034] according to Figures 4-6As shown, the flexible flow assembly 3 is formed by connecting multiple snake-bone sections 31 in series. Each snake-bone section 31 has a tenon 311 and a groove 312 that are mutually compatible at both ends. Adjacent snake-bone sections 31 are hinged by the tenon 311 being inserted into the groove 312. One end of the flexible flow assembly 3 is fixedly connected to the electrode tube 21, and the other end is fixedly connected to the smoking pipe 22. A wire threading seat 7 is provided on the side wall of the snake-bone section 31. The drive traction wire 51 is threaded through the wire threading seat 7. A positioning slot 411 is provided on the side wall of the drive bevel gear 41. A positioning connecting sleeve 61 is provided on the rotating wheel 6. The positioning connecting sleeve 61 is provided with a positioning protrusion 611 that cooperates with the positioning slot 411. The wire threading seat 7 provided on the side wall of the snake-bone section 31 provides precise threading of the drive traction wire 51. With the guide support, the two drive traction wires 51 can stably pass through the smoking pipe 22 and be fixed to the end of the flow-through bendable component 3, avoiding deviation, entanglement or wear of the drive traction wires 51 during transmission. This solves the pain points of unstable traction transmission and easy jamming, ensuring that the power of the bidirectional bending angle transmission gear set 4 can be accurately transmitted to the flow-through bendable component 3. This enables precise control of the bending angle of the hollow internal functional rod 2 on both sides. Moreover, the setting of the threading seat 7 does not occupy the internal space of the snake joint 31, ensuring the unobstructed smoke suction channel of the smoking pipe 22. It takes into account the bending flexibility of the flow-through bendable component 3, the transmission stability of the bidirectional bending angle transmission gear set 4 and the bidirectional bending control traction wire set 5, and the smoke removal effect of the smoking pipe 22, further improving the accuracy and safety of surgical operation.

[0035] according to Figure 7 As shown, a sealing and fixing box 8 is fitted and sealed on the smoking pipe 22. The smoking pipe 22 passes through the sealing and fixing box 8 and extends outside the sealing and fixing box 8. The driving bevel gear 41 is fixedly connected to the smoking pipe 22. Two driven bevel gears 42 are rotatably disposed between the sealing and fixing box 8 and the smoking pipe 22. Two threading holes 221 are opened in the part of the smoking pipe 22 located in the sealing and fixing box 8 to facilitate the passage of two driving traction wires 51. By opening two threading holes 221 in the part of the smoking pipe 22 located in the sealing and fixing box 8, the two driving traction wires 51 are correspondingly passed through, realizing the orderly arrangement of the driving traction wires 51. This solves the problem of transmission jamming caused by easy tangling and crossing of the driving traction wires 51, and ensures the smooth power transmission of the driving traction wires 51. The hollow functional rod 2 and the flow-through flexible component 3 are both covered with insulating flexible tubes 200. A hexagonal retaining ring 201 is provided at the end of the smoking pipe 22. The end of the smoking pipe 22 is a closed end.

[0036] according to Figures 8-12As shown, the hollow functional rod 2 is also equipped with a flushing pipe 23. One end of the flushing pipe 23 extends to the inner wall of the electrocoagulation cutting hook 1 and is fixedly connected to the inner wall of the electrode tube 21 by a connecting rod 210. The other end extends into the sealed fixing box 8. The two sides of the sealed fixing box 8 are respectively fixed with a smoke exhaust pipe 81 and a flushing liquid injection pipe 82. The smoke exhaust pipe 81 and the side wall of the smoke extraction pipe 22 are fixedly connected and communicate with each other. The flushing liquid injection pipe 82 and the flushing pipe 23 are fixedly connected and communicate with each other. The flushing pipe 23 includes a first rigid pipe 231, a flexible hose 232 and a second rigid pipe 233 connected in sequence. The first rigid pipe 231 is located inside the electrode tube 21, the flexible hose 232 is located inside the flow-through bendable assembly 3, and the second rigid pipe 233 is located inside the smoke extraction pipe 22.

[0037] according to Figures 13-16As shown, a deformation-coupled variable diameter duct mechanism 9 is also provided between the flushing duct 23 and the smoke extraction duct 22. The deformation-coupled variable diameter duct mechanism 9 includes a rotating ring 91, a mounting ring 92, an adjusting blade 93, a fixing ring 95, a connecting ring 96, a support bar 97, and a rotating shaft 98. The outer wall of the rotating ring 91 is fixedly connected to the inner wall of the rotating wheel 6. The connecting ring 96 is fixedly connected to the rotating ring 91 and located inside the smoke extraction duct 22. The mounting ring 92 is located inside the connecting ring 96. The fixing ring 95 is located at the center of the mounting ring 92 and is fixed to the second rigid pipe 233. Mounting ring 92 and fixed ring 95 are fixedly connected by support bar 97. Adjusting blades 93 are arranged in a circumferential array between mounting ring 92 and fixed ring 95. One end of each adjusting blade 93 is rotatably connected to fixed ring 95 via rotating shaft 98, and the other end is rotatably connected to mounting ring 92 via rotating shaft 98. Connecting ring 96 drives the adjusting blades 93 to rotate. A guide transmission roller 921 is provided between connecting ring 96 and mounting ring 92. A transmission arm 922 is fixed on the rotating shaft 98 at the end of each adjusting blade 93. The transmission arm 922 is provided with a strip-shaped guide groove 923. An internal sliding positioning pin 924 is fixed to the connecting ring 96. Utilizing the sliding engagement of the positioning pin 924 within the strip-shaped guide groove 923, the rotational motion of the connecting ring 96 is converted into the oscillating motion of the transmission arm 922 around the rotation axis 98. This, in turn, drives the adjusting blades 93 to rotate synchronously and uniformly, achieving stable and precise adjustment of the duct diameter of the smoke extraction duct 22. This solves the problems of asynchronous adjustment of the adjusting blades and large angle deviations that easily occur in traditional transmission methods, leading to low duct diameter adjustment accuracy and inaccurate flow area control. Simultaneously, the smoke extraction duct 22 is equipped with two sealing... The inner ring of the bearing 94 and the smoke duct 22 are fixedly connected, and the outer ring of the bearing 94 and the rotating ring 91 are fixedly connected. The support bar 97 realizes the stable connection between the mounting ring 92 and the fixed ring 95, providing reliable rotational support for the adjusting blade 93. The bearing setting makes the rotation of the adjusting blade 93 smoother, ensuring the accuracy and smoothness of the duct diameter adjustment. At the same time, the deformation coupling type variable diameter duct mechanism 9 uses the second rigid pipe 233 of the flushing pipe 23 as the installation support and is arranged inside the smoke duct 22, without occupying extra space and without affecting the flow effect of the flushing pipe 23.

[0038] Low power consumption is achieved by adding a low-temperature coating to the surface of the electrocoagulation cutting hook 1. This coating prevents tissue adhesion, isolates the high temperature of the hook head surface to prevent tissue thermal damage, and also has a certain electrical insulation effect. This allows high-frequency electrical energy to be concentrated at the edge or tip of the hook head, thereby improving the discharge effect at the edge or tip. The same electrocutting or electrocoagulation effect can be achieved with only lower energy, hence the term "low power." In actual surgery, the same cutting operation can be achieved by setting a lower energy level, which saves electrical energy and avoids more thermal damage risks to the patient, thus improving safety. The low-temperature coating can be made of materials with heat insulation or insulating effects, such as organosilicon, silicone rubber, polytetrafluoroethylene, ceramics, tungsten sulfide, silicon nitride, and graphite. Specific processes can include spraying, dip coating, and deposition.

[0039] Working principle: According to Figures 1 to 16 As shown, during use, the end of the smoking pipe 22 is inserted into the handle to turn on the power, thereby performing electrocoagulation and electrocutting functions of the electrocoagulation cutting hook 1 on the tissue. When the operator needs to control the internal hollow functional rod 2 to bend in both directions, the rotating wheel 6 set outside the smoking pipe 22 is rotated. The rotating wheel 6 is precisely engaged with the positioning slot 411 on the side wall of the active bevel gear 41 through the positioning connecting bushing 61 and positioning protrusion 611 on its inner wall, thereby transmitting the rotational power to the active bevel gear 41 fixed to the smoking pipe 22 without loss. The driving bevel gear 41 drives the two driven bevel gears 42 meshing with it to rotate synchronously in opposite directions within the sealed fixing box 8. The driving traction wire 51 is wound around the annular groove on the toothless shaft wall of the driven bevel gear 42. The rotation of the driven bevel gear 42 realizes the orderly winding and unwinding of the traction wire. Each driven bevel gear 42 is fixedly connected to a driving traction wire 51. These two driving traction wires 51 form a bidirectional bending control traction wire group 5. After the driving traction wire 51 is led out from the driven bevel gear 42, it passes through the corresponding wire hole 221 on the smoking pipe 22 and enters and penetrates the interior of the smoking pipe 22. Finally, it extends to the end of the flexible assembly 3 and is fixed thereto. When the rotating wheel drives the traction wire on one side to tighten, it will pull the flexible assembly 3, which is formed by multiple snake bone segments 31 connected in series by tenon 311 and groove 312, to bend to that side. By the reciprocating or rotating of the rotating wheel in different directions, the hollow functional rod 2 can be flexibly and stably bent to both sides through the flexible assembly 3, thereby changing the working angle and working surface of its end electrocoagulation cutting hook 1. This allows the hook head to be used to cut and hook tissue without changing the instrument, or to use its back to electrocoagulate and stop bleeding.

[0040] During cutting or electrocoagulation, the surgical smoke and tissue fluid generated by the electrocoagulation cutting hook 1 are drawn into the independent smoke-smoking pipe 22 inside the hollow functional rod 2 through the electrode tube 21 and the internal channel of the flexible flow assembly 3. The smoke-smoking pipe 22 is sealed and connected to the exhaust pipe 81 fixed to one side of the sealed fixing box 8, and is suctioned in real time by an external negative pressure device through the exhaust pipe 81 to maintain a clear surgical field. At the same time, to meet the rinsing needs of different surgical steps, the rinsing fluid can be injected into the rinsing pipe 23 through the rinsing fluid injection pipe 82 on the other side of the sealed fixing box 8. The rinsing pipe 23 is composed of a first rigid tube 231 located inside the electrode tube 21, a flexible hose 232 that can be bent with the flexible flow assembly 3, and a second rigid tube 233 located inside the smoke-smoking pipe 22 connected in sequence. Its end is fixed to the inner wall of the electrode tube 21 by a connecting rod 210, which accurately delivers the rinsing fluid to the operating area near the electrocoagulation cutting hook 1, realizing simultaneous operation of rinsing and smoke-smoking.

[0041] The bending operation and suction air volume adjustment of the present invention are linked. When the operator rotates the rotating wheel 6 to bend the hollow functional rod 2, the rotating wheel 6 simultaneously drives the rotating ring 91 and the connecting ring 96 fixed to its inner wall to rotate together. The rotation of the connecting ring 96 slides in the strip guide groove 923 of the transmission arm 922 through the positioning pin 924 on it, which is converted into the swing of the transmission arm 922. The transmission arm 922 is fixed to the rotating shaft 98 at the end of the adjusting blade 93, thereby driving multiple adjusting blades 93 arranged in a circumferential array between the mounting ring 92 and the fixed ring 95 to rotate synchronously around their respective rotating shafts 98. The rotation of the adjusting blades 93 changes the diameter of the air duct they form inside the smoke extraction duct 22. When the hollow functional rod 2 is bent to one side for electrocautery operation and a large amount of smoke is expected, the linkage mechanism can simultaneously increase the angle of the adjusting blades 93 to increase the flow area of ​​the suction air duct and enhance the suction efficiency. When it is bent in the opposite direction for electrocoagulation operation and a small amount of smoke is expected, the angle of the adjusting blades 93 is simultaneously reduced to decrease the suction air volume, thereby achieving adaptive matching between the suction effect and the surgical scenario, ensuring a clear field of vision and optimizing the operating experience.

[0042] The entire hollow internal functional rod 2 and the flexible flow assembly 3 are completely covered by an insulating flexible tube 200, providing comprehensive insulation protection and wear resistance and leak prevention. At the end of the instrument, the smoke extraction tube 22 is a closed end and is equipped with a hexagonal retaining ring 201, which facilitates quick and stable engagement and disengagement with external control devices such as standard handles, making disassembly and replacement convenient and improving ease of use and economy. Through the coordinated work of the above components, this invention achieves integrated functions of precise bidirectional bending, efficient synchronous flushing and suction, and adaptive airflow adjustment, significantly improving the operational efficiency, accuracy, and safety of minimally invasive surgery.

Claims

1. A multi-functional high-frequency electrosurgical unit with a flexible, bendable rod, capable of punching, suction, low power, and cutting, characterized in that... It includes an electrocoagulation cutting hook (1), a hollow internal functional rod (2), a flow-through bendable assembly (3), a two-way bending angle transmission gear set (4), a two-way bending control traction wire set (5), and a rotating wheel (6). The hollow functional rod (2) is divided into an electrode tube (21) and a smoking pipe (22). The electrocoagulation cutting hook (1) is fixedly installed at the end of the electrode tube (21). The flow-through bendable component (3) is connected between the smoking pipe (22) and the electrode tube (21). The bidirectional bending angle transmission gear set (4) is set at the end of the smoking pipe (22). One end of the bidirectional bending control traction wire set (5) is fixedly connected to the bidirectional bending angle transmission gear set (4), and the other end passes through the smoking pipe (22) and is fixedly connected to the end of the flow-through bendable component (3). The rotating wheel (6) is sleeved on the outside of the smoking pipe (22) and is fixedly connected to the bidirectional bend angle transmission gear set (4); The bidirectional bend transmission gear set (4) includes a driving bevel gear (41) and two driven bevel gears (42). The driving bevel gear (41) is located at the end of the smoking pipe (22), and the two driven bevel gears (42) mesh with the driving bevel gear (41) respectively. The bidirectional control bending traction wire set (5) includes two driving traction wires (51). One end of the two driving traction wires (51) is fixedly connected to the two driven bevel gears (42) of the bidirectional bend transmission gear set (4) respectively, and the other end passes through the inside of the smoking pipe (22) and is fixedly connected to the end of the flow-through bendable component (3). A sealing and fixing box (8) is fitted on the smoking pipe (22) and sealed and fixed. The smoking pipe (22) passes through the sealing and fixing box (8) and extends to the outside of the sealing and fixing box (8). The driving bevel gear (41) is fixedly connected to the smoking pipe (22). Two driven bevel gears (42) are rotatably disposed between the sealing and fixing box (8) and the smoking pipe (22). The part of the smoking pipe (22) located in the sealing and fixing box (8) has two threading holes (221) to facilitate the passage of two driving traction wires (51). The hollow functional rod (2) is also provided with a flushing pipe (23). One end of the flushing pipe (23) extends to the inner wall of the electrocoagulation cutting hook (1) and the electrode tube (21) through a connecting rod (210). The other end extends into the sealed fixing box (8). The two sides of the sealed fixing box (8) are respectively fixed with a smoke exhaust pipe (81) and a flushing liquid injection pipe (82). The side walls of the smoke exhaust pipe (81) and the smoke extraction pipe (22) are fixedly connected and communicate with each other. The flushing liquid injection pipe (82) and the flushing pipe (23) are fixedly connected and communicate with each other. The flushing pipe (23) includes a first rigid pipe (231), a flexible pipe (232), and a second rigid pipe (233) connected in sequence. The first rigid pipe (231) is located inside the electrode pipe (21), the flexible pipe (232) is located inside the flow-through bendable assembly (3), and the second rigid pipe (233) is located inside the smoking pipe (22). A deformation-coupled variable diameter air duct mechanism (9) is also provided between the flushing pipe (23) and the smoke extraction pipe (22). The deformation-coupled variable diameter air duct mechanism (9) includes a rotating ring (91), a mounting ring (92), an adjusting blade (93), a fixing ring (95), a connecting ring (96), a support bar (97), and a rotating shaft (98). The outer wall of the rotating ring (91) is fixedly connected to the inner wall of the rotating wheel (6). The connecting ring (96) is fixedly connected to the rotating ring (91) and located inside the smoke extraction pipe (22). The mounting ring (92) is located inside the connecting ring (96). The fixing ring (95) is located at the center of the mounting ring (92). The fixing ring (95) is fixed on the second rigid tube (233). The mounting ring (92) and the fixing ring (95) are fixedly connected by the support bar (97). The adjusting blade (93) is arranged in a circumferential array between the mounting ring (92) and the fixing ring (95). One end of the adjusting blade (93) is rotatably connected to the fixing ring (95) through a rotating shaft (98), and the other end is rotatably connected to the mounting ring (92) through a rotating shaft (98). The connecting ring (96) drives the adjusting blade (93) to rotate by rotation.

2. The multi-functional high-frequency electric knife with a flexible functional rod, capable of punching, suction, low power, and cutting, as described in claim 1, is characterized in that... The flow-through bendable component (3) is formed by connecting multiple snake bone sections (31) in series. Each snake bone section (31) has a tenon (311) and a groove (312) that are compatible with each other at both ends. Adjacent snake bone sections (31) are hinged by inserting the tenon (311) into the groove (312). One end of the flow-through bendable component (3) is fixedly connected to the electrode tube (21), and the other end is fixedly connected to the smoking pipe (22); the side wall of the snake joint (31) is provided with a threading seat (7), and the driving traction wire (51) is threaded through the threading seat (7).

3. The multi-functional high-frequency electrosurgical unit with a bendable functional rod, capable of punching, suction, low power, and cutting, as described in claim 1, is characterized in that... The active bevel gear (41) has a positioning slot (411) on its side wall, and the rotating wheel (6) has a positioning connecting sleeve (61) with a positioning protrusion (611) that cooperates with the positioning slot (411).

4. A multi-functional high-frequency electrosurgical unit with a bendable functional rod, capable of punching, suction, low power, and cutting, as described in claim 1, characterized in that... A guide transmission roller (921) is provided between the connecting ring (96) and the mounting ring (92). A transmission arm (922) is fixed on the rotating shaft (98) at the end of each adjusting blade (93). A strip guide groove (923) is provided on the transmission arm (922). A positioning pin (924) is slidably provided in the strip guide groove (923). The positioning pin (924) is fixed on the connecting ring (96).

5. A multi-functional high-frequency electrosurgical unit with a bendable functional rod, capable of punching, suction, low power, and cutting, as described in claim 1, characterized in that... The hollow internal functional rod (2) and the flow-through flexible component (3) are both covered with an insulating flexible tube (200). The end of the smoking pipe (22) is provided with a hexagonal retaining ring (201), and the end of the smoking pipe (22) is a closed end.

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