Radio frequency electric hook with bendable tool bit

Abstract

The radio frequency electric hook comprises a handle, one end of the handle is connected with one end of an outer tube, and an inner tube is inserted into an inner cavity of the outer tube; one end of an inner tube body of the inner tube is connected with a tool bit seat, the tool bit seat is rotationally connected with a tool bit connecting part, and the tool bit connecting part is fixedly connected with a tool bit hook part of the tool bit; a bending angle is set in the middle of the tool bit connecting part, and the tool bit pin is located at the bending angle on the tool bit connecting part; an outer pipe pin is arranged at the position, corresponding to the tool bit connecting part, in the outer pipe, and the tool bit connecting part abuts against the outer pipe pin; when the tool bit hook part extends out of the outer tube, the outer tube pin is far away from the tool bit hook part relative to the tool bit pin; and when the tool bit hook part is retracted into the outer pipe, the outer pipe pin is close to the tool bit hook part relative to the tool bit pin. The electric hook tool bit of the ablation electrode is designed to be of the warped plate structure, the tool bit can be retracted into the outer tube, sight is prevented from being blocked by the outer tube by controlling the angle of the hook portion of the tool bit, and operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and more particularly to a radiofrequency electric hook with a bendable cutter head. Background Art

[0002] There are various types of endoscopic instruments. In recent years, a new type of endoscopic instrument, an electric hook capable of smoking and aspirating fluid, has been favored due to its unique functions and advantages.

[0003] The electric hook capable of smoking and aspirating fluid is a new type of surgical instrument that integrates multiple functions such as cutting, hemostasis, smoking, and aspirating fluid. Its basic structure includes a cutter head, a suction tube, a power source, and a control part. The cutter head is made of special materials, which can not only easily cut tissues but also have good hemostatic effects. The suction tube part is exquisitely designed and can conveniently aspirate smoke and accumulated fluid during the operation to keep the surgical field clear. The power source and control part are responsible for providing stable energy and precise operation control for the electric hook.

[0004] Regarding the cutting and hemostasis functions: The cutter head of the electric hook can quickly and accurately cut tissues and achieve hemostasis through electrocoagulation during the cutting process, thereby reducing the risk of intraoperative bleeding and postoperative bleeding.

[0005] Regarding the smoking function: During the operation, the electric hook can aspirate the generated smoke in real time through the suction tube part, keep the surgical area clean and the field of vision clear, which helps the doctor better observe the surgical site and improve the accuracy and safety of the operation.

[0006] Regarding the aspirating fluid function: For the accumulated fluid during the operation, the electric hook can also aspirate it through the suction tube part, avoiding the interference of the accumulated fluid on the surgical field of vision and improving the efficiency and quality of the operation.

[0007] The electric hook capable of smoking and aspirating fluid has the following advantages compared with traditional surgical instruments:

[0008] 1. Diversified functions: It integrates multiple functions such as cutting, hemostasis, smoking, and aspirating fluid, simplifies the replacement process of surgical instruments, and improves the operation efficiency.

[0009] 2. Easy to operate: The design of the electric hook conforms to the ergonomic principle, is easy to operate and flexible. Doctors can easily control the cutting depth and speed to achieve precise surgery.

[0010] 3. High safety: The electric hook has good cutting and hemostasis effects. At the same time, the smoking and aspirating fluid functions can keep the surgical field of vision clear and reduce the surgical risk.

[0011] Although the existing electric hook also has functions such as smoking and aspirating fluid, the cutter head is fixed at the front end of the outer tube and cannot be retracted into the tube, and the operations of coagulation cutting and aspirating fluid are not convenient. Content of the Utility Model

[0012] The purpose of the present utility model is to provide a radiofrequency electrocautery hook with a novel bendable cutter head in view of the problems existing in the prior art.

[0013] To achieve the above purpose, the technical solution adopted by the present utility model to solve the technical problems is as follows:

[0014] A radiofrequency electrocautery hook with a bendable cutter head includes a handle. One end of the handle is connected to one end of an outer tube, and an inner tube is inserted into the inner cavity of the outer tube;

[0015] The inner tube includes an inner tube body. One end of the inner tube body is connected to the cutter head seat of the inner tube. The cutter head seat is rotationally connected to the cutter head connection part of the cutter head through a cutter head pin, and the cutter head connection part and the cutter head hook part of the cutter head are fixedly connected; the other end of the inner tube body passes through one end of the handle and extends into the handle and is inserted into a guide tube located in the handle. The guide tube extends from the inside of the handle to the other end of the handle and is connected to a suction tube outside the handle. The suction tube is connected to an external negative pressure pump through a straight-through valve;

[0016] A bending angle is set in the middle of the cutter head connection part, and the cutter head pin is located at the position with the bending angle on the cutter head connection part; an outer tube pin is arranged at a position corresponding to the cutter head connection part inside the outer tube, and the cutter head connection part is located between the inner wall of the outer tube and the outer tube pin, and the cutter head connection part abuts against the outer tube pin; when the inner tube body slides to drive the cutter head hook part to extend out of the outer tube, the outer tube pin moves away from the cutter head hook part relative to the cutter head pin; when the cutter head hook part retracts into the outer tube, the outer tube pin moves closer to the cutter head hook part relative to the cutter head pin.

[0017] As described above, a strip-shaped opening is provided on the side wall of the handle, and a side sliding key passes through the strip-shaped opening from the outside of the side wall of the handle and is connected to an inner tube fixing part inside the handle; the inner tube fixing part is connected to the middle part of the outer wall of the inner tube.

[0018] As described above, a fixing sleeve is further arranged inside the handle, and the inner tube passes through the center of the fixing sleeve and then is inserted into the guide tube.

[0019] As described above, the inner tube is connected to a switch circuit board inside the handle through an electrode. A coagulation cutting key is arranged on the switch circuit board, and the coagulation cutting key passes through the side wall of the handle and extends to the outside of the handle. The switch circuit board is connected to a power cord, and the power cord passes through the outer wall of the handle and is connected to an external power supply.

[0020] As described above, the cutter head hook part, the cutter head connection part, the cutter head seat, the inner tube body and the cutter head pin are all made of stainless steel.

[0021] As described above, the handle, the coagulation cutting key, the inner tube fixing part, the side sliding key, the fixing sleeve, the outer tube, the outer tube pin and the guide tube are all made of polyethylene insulating plastic.

[0022] As described above, a part of the inner tube that is not inserted into the outer tube and the guiding tube is wrapped with a heat shrinkable tube, and the inner tube fixing member passes through the side wall of the heat shrinkable tube and is connected to the middle part of the outer wall of the inner tube.

[0023] As described above, one end of the outer tube passes through one end of the handle and is connected to the limiting ring in the handle. A first waterproof silica gel ring is arranged on the outer periphery of the end of the outer tube connected to the limiting ring; a second waterproof silica gel ring is sleeved on the inner tube, and the second waterproof silica gel ring is located between the outer wall of the inner tube and the inner wall of the guiding tube.

[0024] As described above, both the cutter head connecting part and the cutter head seat are sheet-shaped.

[0025] Compared with the existing technology, the utility model has the following effects:

[0026] This technology is based on the original ablation electrode. The electric hook cutter head of the ablation electrode is ingeniously designed as a seesaw structure. When the electric hook needs to work, the side sliding key is pushed to drive the sliding groove and the inner tube, so that the cutter head is extruded by the outer tube and the outer tube pin, and the cutter head can extend out of the top end of the outer tube. The cutter head forms a "7" shape outside the outer tube as shown in ( Figure 2a ) and can coagulate and cut while smoking; when the electric hook needs to aspirate, the side sliding key is pulled down to retract the cutter head into the outer tube, as shown in Figure ( Figure 2b ) and then aspiration can be carried out.

[0027] The straight-through valve connected to the tail end can adjust the suction force. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application.

[0029] Figure 1a It is a schematic structural diagram of a radiofrequency electric hook with a bendable cutter head;

[0030] Figure 1b A structural sectional view of a radiofrequency electric hook with a bendable cutter head;

[0031] Figure 2a It is a schematic structural diagram of the cutter head in the coagulation and cutting working state;

[0032] Figure 2b It is a schematic structural diagram of the cutter head in the aspiration working state;

[0033] Figure 3 It is a schematic connection diagram of the cutter head and the inner tube;

[0034] Among them, 1 - cutting head, 101 - cutting head hook part, 102 - cutting head connecting part, 2 - cutting head pin, 3 - outer tube pin, 4 - inner tube, 401 - cutting head seat, 402 - inner tube body, 5 - outer tube, 6 - handle, 7 - side sliding key, 8 - inner tube fixing part, 9 - coagulation cutting key, 10 - switch circuit board, 11 - fixing sleeve, 12 - guiding tube, 13 - power cord, 14 - suction tube, 15 - straight-through valve, 16 - first waterproof silicone ring, 17 - second waterproof silicone ring. Detailed implementation manners

[0035] For the convenience of those of ordinary skill in the art to understand and implement the present utility model, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0036] Embodiment

[0037] As shown in FIGS. 1 - 2, a radiofrequency electric hook with a bendable cutting head includes an electric knife circuit, a fixing mechanism and a suction mechanism, wherein:

[0038] The electric knife circuit is used to complete coagulation cutting operations and switch control, and includes: cutting head 1, inner tube 4, switch circuit board 10, coagulation cutting key 9 and power cord 13;

[0039] The suction mechanism is used to suck smoke, water vapor and liquid, and includes: inner tube 4, outer tube 5, guiding tube 12, suction tube 14 and straight-through valve 15;

[0040] The fixing mechanism is used to fix or limit the electric knife circuit and the suction mechanism, and includes: handle 6, side sliding key 7, inner tube fixing part 8, fixing sleeve 11, outer tube 5 and guiding tube 12.

[0041] The specific settings are as follows:

[0042] One end of the handle 6 is connected to one end of the outer tube 5, and the inner cavity of the outer tube 5 is inserted with the inner tube 4;

[0043] The inner tube 4 includes an inner tube body 402 and a cutting head seat 401. One end of the inner tube body 402 is connected to the cutting head seat 401. The cutting head seat 401 is rotatably connected to the cutting head connecting part 102 of the cutting head 1 through a cutting head pin 2. The cutting head connecting part 102 and the cutting head hook part 101 of the cutting head 1 are fixedly connected;

[0044] The other end of the inner tube body 402 passes through one end of the handle 6 and extends into the handle 6 and is inserted into the guiding tube 12 located in the handle 6. The inner tube body 402 is slidably connected to the guiding tube 12. The guiding tube 12 extends from the inside of the handle 6 to the other end of the handle 6 and is connected to the suction tube 14 outside the handle 6. The suction tube 14 is connected to an external negative pressure pump through a straight-through valve 15.

[0045] To avoid the outer tube 5 blocking the line of sight during the cutting operation, a bending angle is set in the middle of the cutter head connecting portion 102, and the cutter head pin 2 is located at the position with the bending angle on the cutter head connecting portion 102; an outer tube pin 3 is arranged at a position corresponding to the cutter head connecting portion 102 inside the outer tube 5. The cutter head connecting portion 102 is located between the inner wall of the outer tube 5 and the outer tube pin 3, and the cutter head connecting portion 102 abuts against the outer tube pin 3. When the inner tube body 402 slides to drive the cutter head hook portion 101 to extend out of the outer tube 5, the outer tube pin 3 moves away from the cutter head hook portion 101 relative to the cutter head pin 2. By abutting the outer tube pin 3 against the side of the cutter head connecting portion 102 close to the inner tube 4, the cutter head hook portion 101 is further hooked downward, as shown in Figure 2a ; when the cutter head hook portion 101 is retracted into the outer tube 5, the outer tube pin 3 moves closer to the cutter head hook portion 101 relative to the cutter head pin 2. By abutting the outer tube pin 3 against the side of the cutter head connecting portion 102 far from the inner tube 4, the cutter head hook portion 101 is attached to the inner wall of the outer tube 5, thus facilitating liquid extraction. By using the outer tube pin 3, the angle of the cutter head hook portion 101 can be fixed when the cutter head 1 extends out of the outer tube 5 and when it retracts into the outer tube 5.

[0046] When the cutter head 1 extends out of the outer tube 5, it can suck smoke and water vapor. When the cutter head 1 retracts into the outer tube 5, it can complete the liquid extraction function. The flow paths of the sucked smoke, water vapor and liquid are all in sequence: the outer tube 5, the inner tube 4, the guiding tube 12, the suction tube 14 and the straight-through valve 15.

[0047] To control the position of the inner tube 4, a strip-shaped opening is provided on the side wall of the handle 6. The side sliding key 7 passes through the strip-shaped opening of the handle 6 from the outside of the side wall of the handle 6 and is connected to the inner tube fixing member 8 inside the handle 6; the inner tube fixing member 8 is connected to the middle part of the outer wall of the inner tube 4. Thus, by sliding the side sliding key 7, the inner tube 4 can be controlled to reciprocate along the direction parallel to the central axis of the handle 6, and further the cutter head 1 can be extended out of the outer tube 5 or retracted into the outer tube 5; by controlling the length of the strip-shaped opening, the reciprocating movement range of the inner tube 4 can be controlled.

[0048] To further fix the radial position of the inner tube 4 in the handle 6, a fixing sleeve 11 is also arranged inside the handle 6. The inner tube 4 passes through the center of the fixing sleeve 11 and then is inserted into the guiding tube 12.

[0049] A switch circuit board 10 is arranged inside the handle 6. The switch circuit board 10 is connected in series between the inner tube 4 and an external power supply. Specifically: the inner tube 4 is connected to the switch circuit board 10 inside the handle 6 through an electrode. A coagulation cutting key 9 is arranged on the switch circuit board 10. The coagulation cutting key 9 passes through the side wall of the handle 6 and extends to the outside of the handle 6. The switch circuit board 10 is connected to a power supply wire 13, and the power supply wire 13 passes through the outer wall of the handle 6 and is connected to an external power supply. When the cutter head 1 is in the energized state, it can complete electrocoagulation cutting and hemostasis, that is, using the heat energy generated by radio frequency waves to destroy tissue cells, and the alternating current changes the direction of ions in the tissue fluid, thereby generating ion agitation and frictional heat, resulting in coagulative necrosis of the tissue.

[0050] To prevent liquid leakage and electric leakage during aspiration, one end of the outer tube 5 passes through one end of the handle 6 and is connected to the limit ring in the handle 6; a first waterproof silicone rubber ring 16 is arranged on the outer periphery of the end of the outer tube 5 connected to the limit ring; a second waterproof silicone rubber ring 17 is sleeved on the inner tube 4, and the second waterproof silicone rubber ring 17 is located between the outer wall of the inner tube 4 and the inner wall of the guide tube 12, and the inner tube 4 and the guide tube 12 are sealed by the second waterproof silicone rubber ring 17.

[0051] The cutter head 1 (including the cutter head hook part 101 and the cutter head connecting part 102), the inner tube 4 (including the cutter head seat 401 and the inner tube body 402), and the cutter head pin 2 are all made of stainless steel. The part of the inner tube 4 that is not inserted into the outer tube 5 and not inserted into the guide tube 12 is wrapped with a heat shrinkable tube for insulation treatment to avoid the loosening of the wiring of the switch circuit board 10 and generate an arc, thereby affecting the impedance. The inner tube fixing part 8 passes through the side wall of the heat shrinkable tube and is connected to the middle part of the outer wall of the inner tube 4.

[0052] The handle 6 is encapsulated by ultrasonic welding. The handle 6, the coagulation cutting button 9, the inner tube fixing part 8, the side sliding key 7, the fixing sleeve 11, the outer tube 5, the outer tube pin 3, and the guide tube 12 are all made of PE (polyethylene) insulating plastic.

[0053] The outer diameters of the outer tube 5 and the guide tube 12 are both 5MM, and the outer diameter of the inner tube 4 is 4.5MM.

[0054] To increase the path diameter of aspiration and liquid extraction, the cutter head connecting part 102 and the cutter head seat 401 are sheet-shaped.

[0055] It should be noted that the specific embodiments described in the present invention are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the present invention belongs can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A radio frequency electric hook with a bendable blade, comprising a handle (6), characterized in that: One end of the handle (6) is connected to one end of the outer tube (5), and the inner tube (4) is inserted into the inner cavity of the outer tube (5); The inner tube (4) comprises an inner tube body (402), one end of the inner tube body (402) is connected to the cutter head seat (401) of the inner tube (4), the cutter head seat (401) is rotatably connected to the cutter head connecting portion (102) of the cutter head (1) via a cutter head pin (2), and the cutter head connecting portion (102) and the cutter head hook portion (101) of the cutter head (1) are fixedly connected; the other end of the inner tube body (402) passes through one end of the handle (6) and extends into the handle (6) and is inserted into a guide tube (12) located in the handle (6), the guide tube (12) extends from the handle (6) to the other end of the handle (6) and is connected to a suction tube (14) outside the handle (6), and the suction tube (14) is connected to an external negative pressure pump via a through valve (15); A bending angle is set in the middle of the cutter head connecting part (102), and the cutter head pin (2) is located at the bending angle on the cutter head connecting part (102); an outer tube pin (3) is arranged in the outer tube (5) at a position corresponding to the cutter head connecting part (102), and the cutter head connecting part (102) is located between the inner wall of the outer tube (5) and the outer tube pin (3), and the cutter head connecting part (102) and the outer tube pin (3) are in contact with each other; when the inner tube body (402) slides to drive the cutter head hook part (101) to extend out of the outer tube (5), the outer tube pin (3) is away from the cutter head hook part (101) relative to the cutter head pin (2); when the cutter head hook part (101) is retracted into the outer tube (5), the outer tube pin (3) is close to the cutter head hook part (101) relative to the cutter head pin (2).

2. According to claim 1, a radio frequency electric hook with a bendable blade, characterized in that: The handle (6) is provided with a strip opening on its side wall, and a side sliding key (7) passes through the strip opening from the outside of the handle (6) side wall and is connected to an inner tube fixing piece (8) in the handle (6); the inner tube fixing piece (8) is connected to the middle part of the outer wall of the inner tube (4).

3. According to claim 1, the radio frequency electric hook with a bendable blade is characterized in that: A fixing sleeve (11) is also provided in the handle (6), and the inner tube (4) passes through the center of the fixing sleeve (11) and is then inserted into the guide tube (12).

4. The radio frequency electric hook with a bendable blade according to claim 1, characterized in that: The inner tube (4) is connected to a switch circuit board (10) in the handle (6) through electrodes. A coagulation button (9) is arranged on the switch circuit board (10). The coagulation button (9) passes through the side wall of the handle (6) and extends outside the handle (6). The switch circuit board (10) is connected to a power line (13). The power line (13) passes through the outer wall of the handle (6) and is connected to an external power source.

5. The radio frequency electric hook with a bendable blade according to claim 1, characterized in that: The cutter head hook portion (101), the cutter head connecting portion (102), the cutter head seat (401), the inner tube body (402) and the cutter head pin (2) are all made of stainless steel.

6. The radio frequency electric hook with a bendable blade according to claim 1, characterized in that: The handle (6), the freezing button (9), the inner tube fixing piece (8), the side sliding button (7), the fixing sleeve (11), the outer tube (5), the outer tube pin (3) and the guide tube (12) are all made of polyethylene insulating plastic.

7. The radio frequency electric hook with a bendable blade according to claim 1, characterized in that: The portion of the inner tube (4) that is not inserted into the outer tube (5) and the guide tube (12) is wrapped with a heat shrink tube, and the inner tube fixing piece (8) passes through the side wall of the heat shrink tube and is connected to the middle part of the outer wall of the inner tube (4).

8. The radio frequency electric hook with a bendable blade according to claim 1, characterized in that: One end of the outer tube (5) passes through one end of the handle (6) and is connected to a limiting ring in the handle (6); a first waterproof silicone ring (16) is provided on the outer periphery of the end of the outer tube (5) connected to the limiting ring; a second waterproof silicone ring (17) is sleeved on the inner tube (4); the second waterproof silicone ring (17) is located between the outer wall of the inner tube (4) and the inner wall of the guide tube (12).

9. The radio frequency electric hook with a bendable blade according to claim 1, characterized in that: The cutter head connecting portion (102) and the cutter head seat (401) are both in sheet shape.

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