An exchangeable tip gas-cooled microwave ablation needle

Abstract

The application provides a replaceable joint air-cooled microwave ablation needle, and belongs to the technical field of air-cooled microwave ablation needles. The replaceable joint air-cooled microwave ablation needle comprises a handle, a needle rod arranged at one end of the handle, and a cable connected to the handle through a joint assembly. The joint assembly comprises a stop unit, which comprises a fixed cylinder I fixed to the handle and a fixed cylinder II fixed to the cable. The lower end of the fixed cylinder I is reserved with a plurality of insertion openings distributed in a ring shape. A plurality of insertion cylinders are fixed to the fixed ring in a ring shape. The insertion cylinders can be inserted into the stop opening through the insertion openings. The outer wall surface of the insertion cylinders in the stop opening is reserved with a plurality of constraint openings. The peripheral surface of the constraint openings is in an arch shape. A bead body is rolled and buckled in the constraint opening. The application solves the problem that most of the existing air-cooled microwave ablation needles are in a whole structure and are disposable medical devices. A brand new needle is required for each operation, which leads to the replacement of the cable part, thereby causing resource waste and increasing the consumption of materials.

Description

Technical Field

[0001] This invention belongs to the field of air-cooled microwave ablation needle technology, specifically relating to an air-cooled microwave ablation needle with interchangeable connectors. Background Technology

[0002] Microwave ablation is a minimally invasive tumor treatment technique. It involves inserting a microwave ablation needle into the tumor tissue and using microwave energy to generate high temperatures that coagulate and kill tumor cells. Air-cooled microwave ablation needles utilize cooling gas (such as compressed carbon dioxide) to create a low-temperature protective layer on the needle surface, effectively protecting surrounding healthy tissue while maintaining an effective ablation temperature in the microwave radiation area at the needle tip. Due to its controllable ablation range and high safety, air-cooled microwave ablation needles are widely used in the treatment of solid tumors such as liver cancer, lung cancer, and thyroid nodules.

[0003] Most existing air-cooled microwave ablation needles are one-piece structures and disposable medical devices. Each surgery requires the use of a brand new needle, which leads to the replacement of the cable, resulting in a waste of resources and an increase in consumables. Summary of the Invention

[0004] This invention provides a replaceable connector air-cooled microwave ablation needle, which aims to solve the problem that most existing air-cooled microwave ablation needles are one-piece structures and disposable medical devices. Each surgery requires the use of a brand new needle, which leads to the replacement of the cable, resulting in waste of resources and increased consumables.

[0005] This invention provides an air-cooled microwave ablation needle with a replaceable connector, including a handle, a needle bar attached to one end of the handle, and a cable connected to the handle via a connector assembly;

[0006] The connector assembly includes a stop unit, which comprises a fixed cylinder one fixed to the handle and a fixed cylinder two fixed to the cable. The lower end of the fixed cylinder one has several circumferentially distributed insertion ports. The radius of the stop ports is larger than the radius of the insertion ports. The upper end of the insertion ports connects to the stop ports. A slanted wall one is installed at the junction of the insertion ports and the stop ports. The upper end of the fixed cylinder two can be inserted into the fixed cylinder one. A fixing ring is fixed to the outer side of the upper end of the fixed cylinder two. Several through-hole insertion cylinders are circumferentially fixed to the fixing ring. The insertion cylinders can pass through the insertion ports and be inserted into the stop ports. The insertion cylinders are positioned on the outer wall surface of the stop ports. Several constraint openings are provided, with the circumference of each opening arched. The ball is rolled and fastened within the constraint openings. The lower end of the insert has a slot that connects to the constraint opening. A traction post is movably installed in the slot. A ring groove is pre-reserved on the lower circumference of the slot. An elastic element is installed in the ring groove and is clamped to the outside of the traction post. A stop ring is movably installed at the lower end inside the ring groove and is fixedly connected to the traction post. Both ends of the elastic element are pressed tightly against the upper wall of the ring groove and the upper wall of the stop ring. An avoidance opening is pre-reserved on the outer circumference of the upper end of the traction post, allowing part of the ball to be retracted.

[0007] Furthermore, the refuge opening has an isosceles trapezoidal structure, comprising a sloping wall at the bottom, a vertical wall in the middle, and a sloping wall at the top.

[0008] Furthermore, the connector assembly also includes an assisted disassembly unit, which includes a rotating ring that is rotatably fastened to the outer circumferential surface of the fixed cylinder two and a stop platform fixed to the lower end of the fixed ring. The upper end of the rotating ring is fixed to a linkage ring, and an elastic element two is installed between the linkage ring and the rotating ring. The elastic element two is clamped to the outer surface of the fixed cylinder two, and both ends of the elastic element two are fixed to the fixed cylinder two and the rotating ring, respectively. The upper end of the linkage ring is in contact with the fixed ring, and a disassembly platform is fixed to the lower wall surface inside the linkage ring. An inclined wall four is installed at the upper end of the disassembly platform, and an inclined wall five, which is directly opposite to the inclined wall four, is installed at the lower end of the traction column. At the same time, the stop platform is located in a position directly opposite to the inclined wall four.

[0009] Furthermore, the connector assembly also includes pipe connection parts installed inside the first and second fixed cylinders;

[0010] The pipe connection includes a lower insertion pipe that is fixedly connected to the fixed cylinder and an upper insertion pipe that is fixedly connected to the fixed cylinder. One end of the lower insertion pipe and the upper insertion pipe are sealed to each other without gaps. The other end of the lower insertion pipe is connected to the air-cooled pipe in the cable, and the other end of the upper insertion pipe is connected to the air-cooled pipe in the handle.

[0011] Furthermore, the connector assembly also includes wiring connectors installed inside the first and second fixed cylinders;

[0012] The wiring connectors include power cable connectors and signal cable connectors;

[0013] The power cord connector includes a vertical core fixed to the second fixed cylinder, a spiral core fixed to the first fixed cylinder, a pair of movable openings reserved on the inner circumferential surface of the second fixed cylinder, and a pair of vertical rods fixed to the upper inner side of the first fixed cylinder. Clamping blocks are installed on both sides of the outer side of the spiral core. A traction rod is fixed to the other side of the clamping blocks. The upper end of the traction rod is fixed to the first wedge platform. The other end of the traction rod is movably installed in the movable opening. The traction rod is connected to the movable opening along its length through the third elastic element. In the initial state, the third elastic element is under compression. The lower end of the vertical rod is fixed to the second wedge platform on the side facing the first wedge platform. A vertical through-hole is reserved on the traction rod, and the second wedge platform on the vertical rod can pass through the through-hole.

[0014] Furthermore, the spiral core is sleeved outside the vertical core, and the inner diameter of the spiral core is larger than the outer diameter of the vertical core.

[0015] Furthermore, sliders are fixed to both sides of the traction rod, and grooves adapted to the sliders are reserved on both sides of the movable opening.

[0016] Furthermore, the sum of the height of the wedge-shaped platform and the height of the traction rod is less than the height of the movable opening.

[0017] Furthermore, the pointed end of the second wedge faces the pointed end of the first wedge, and the pointed end of the second wedge is located between the pointed ends of the first wedge.

[0018] Furthermore, the width of the receiving opening is equal to the width of wedge-shaped platform one, and the width of the receiving opening is greater than the sum of the widths of the vertical rod and wedge-shaped platform two.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention, through the installation of a connector assembly, enables the rapid disassembly and assembly of a handle with a needle bar and a cable, thereby facilitating the replacement of the handle with the needle bar, reducing surgical consumables and saving on usage costs.

[0021] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0025] Figure 3 This is an embodiment of the present invention. Figure 2 A magnified structural diagram at point A;

[0026] Figure 4 This is an embodiment of the present invention. Figure 3 A magnified structural diagram at point B;

[0027] Figure 5 This is a schematic diagram of the assembly structure of the traction column, disassembly platform, and stop platform according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the disassembled structure of the connector assembly according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the cross-sectional structure of the two parts of the fixed cylinder according to an embodiment of the present invention;

[0030] Reference numerals: 1. Handle; 2. Needle bar; 3. Cable; 4. Connector assembly; 5. Fixing cylinder one; 6. Insertion port; 7. Stop port; 8. Inclined wall one; 9. Fixing cylinder two; 10. Fixing ring; 11. Insertion cylinder; 12. Constraint port; 13. Bead; 14. Slot; 15. Traction post; 16. Ring groove; 17. Elastic element one; 18. Stop ring; 19. Avoidance port; 191. Inclined wall two; 192. Vertical wall; 193. 20. Slanted Wall 3; 21. Rotating Ring; 22. Linkage Ring; 23. Elastic Component 2; 24. Disassembly Table; 25. Stop Table; 26. Slanted Wall 4; 27. Slanted Wall 5; 28. Lower Insertion Pipe; 29. ​​Upper Insertion Pipe; 30. Vertical Core; 31. Spiral Core; 32. Clamping Block; 33. Traction Rod; 34. Wedge-Shaped Table 1; 35. Movable Port; 36. Elastic Component 3; 37. Vertical Rod; 38. Wedge-Shaped Table 2; 39. Receiving Port. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Reference Figures 1 to 7This invention provides a replaceable connector air-cooled microwave ablation needle, which includes a handle 1, a needle bar 2 attached to one end of the handle 1, and a cable 3 attached to the other end of the handle 1. The cable 3 is connected to the handle 1 via a connector assembly 4, and a PDM connector (not shown in the figure) is attached to the other end of the cable 3.

[0034] By installing the connector assembly 4, the handle 1 with needle bar 2 and cable 3 can be quickly disassembled and assembled, thereby enabling the replacement of the handle 1 with needle bar 2, reducing surgical consumables and saving usage costs.

[0035] It should be noted that the handle 1, needle bar 2, and cable 3 are all existing technologies and will not be described in detail here.

[0036] The connector assembly 4 includes a stop unit, which comprises a first fixed cylinder 5 fixed to the handle 1 and a second fixed cylinder 9 fixed to the cable 3. The lower end of the first fixed cylinder 5 has several circumferentially distributed insertion ports 6. The radius of the stop port 7 is larger than the radius of the insertion ports 6. The upper end of the insertion ports 6 connects to the stop port 7. A slanted wall 8 is installed at the junction of the insertion ports 6 and the stop port 7. The upper end of the second fixed cylinder 9 can be inserted into the first fixed cylinder 5. A fixing ring 10 is fixed to the outer side of the upper end of the second fixed cylinder 9. Several through-hole insertion cylinders 11 are circumferentially fixed to the fixing ring 10. The insertion cylinders 11 can pass through the insertion ports 6 and be inserted into the stop port 7. Several constraint openings 12 are reserved on the outer wall surface of the insertion cylinder 11 within the stop port 7. The circumference of the constriction opening 12 is arched, and the bead 13 is rolled and fastened in the constriction opening 12. The lower end of the insert 11 has a slot 14 that communicates with the constriction opening 12. The traction post 15 is movably installed in the slot 14. The lower circumference of the slot 14 has a ring groove 16. An elastic element 17 is installed in the ring groove 16. The elastic element 17 is clamped to the outside of the traction post 15. The lower end of the ring groove 16 has a stop ring 18 that is movably installed. The stop ring 18 is fixed to the traction post 15. Both ends of the elastic element 17 are pressed and connected to the upper wall of the ring groove 16 and the upper wall of the stop ring 18. The outer circumference of the upper end of the traction post 15 has an avoidance opening 19 that allows part of the bead 13 to be retracted.

[0037] When the connector assembly 4 is in the connected state, the insert 11 passes through the insert 6 and is inserted into the stop 7. Part of the bead 13 is on the outside of the insert 11 and abuts against the inclined wall 8. At this time, the elastic element 17 presses the stop ring 18 into the ring groove 16, keeping the traction column 15 in a stationary state. Then, the surface of the traction column 15 at the upper end of the avoidance port 19 contacts the surface of the bead 13. The traction column 15 presses the bead 13 against the constraint port 12, thereby constraining the insert 11 in the stop 7, that is, connecting the fixing ring 10 to the fixing cylinder 5, and then the connector assembly 4 is in the connected state.

[0038] When the connector assembly 4 is in the disassembled state, the traction post 15 is pressed, causing it to move upwards. The elastic element 17 is compressed and shortened by the stop ring 18. After the traction post 15 moves into position, the avoidance opening 19 on the traction post 15 moves to a position directly opposite the bead 13. The fixing ring 10 moves outwards, giving the insertion tube 11 on the fixing ring 10 the momentum to move outwards from the stop opening 7. At this moment, with the cooperation of the inclined wall 8, the bead 13 moves towards one side of the avoidance opening 19. When the bead 13 moves away from the inclined wall 8, the bead 13 is completely retracted into the constraint opening 12, and the wall surface of the bead 13 touches the wall surface of the avoidance opening 19. At this moment, the insertion tube 11 can be pulled out of the stop opening 7 and the insertion opening 6, thereby achieving the purpose of disassembling the connector assembly 4.

[0039] The refuge opening 19 has an isosceles trapezoidal structure and includes a lower inclined wall 191, a middle vertical wall 192, and an upper inclined wall 193.

[0040] As the traction column 15 moves upward, when the avoidance opening 19 is directly opposite the bead 13, part of the bead 13 moves into the avoidance opening 19. The surface of the bead 13 comes into contact with parts of the second inclined wall 191, the vertical wall 192, and the third inclined wall 193, thereby accommodating the bead 13. When the traction column 15 moves downward with the cooperation of the elastic element 17, the third inclined wall 193 presses the bead 13 outward. When the bead 13 passes the third inclined wall 193, the surface of the traction column 15 presses the bead 13 tightly against the constraint opening 12, ensuring that the bead 13 is in the stopped position. The movement of the bead 13 is very smooth throughout the process, making it easy to operate.

[0041] Example 2

[0042] Reference Figures 1 to 7 The difference from the above embodiment is that the connector assembly 4 also includes an assist disassembly unit. The assist disassembly unit includes a rotating ring 20 that is rotatably fastened to the outer peripheral surface of the fixed cylinder 2 9 and a stop platform 24 that is fixed to the lower end of the fixed ring 10. The upper end of the rotating ring 20 is fixedly connected to a linkage ring 21. An elastic element 22 is installed between the linkage ring 21 and the rotating ring 20. The elastic element 22 is clamped to the outer surface of the fixed cylinder 2 9. Both ends of the elastic element 22 are fixedly connected to the fixed cylinder 2 9 and the rotating ring 20, respectively. The upper end of the linkage ring 21 is in contact with the fixed ring 10. A disassembly platform 23 is fixedly connected to the lower wall surface inside the linkage ring 21. An inclined wall 4 25 is installed at the upper end of the disassembly platform 23. An inclined wall 5 26 that is directly opposite to the inclined wall 4 25 is installed at the lower end of the traction column 15. At the same time, the stop platform 24 is located in a position directly opposite to the inclined wall 4 25.

[0043] When the connector assembly 4 is disassembled, the rotating ring 20 is rotated, which pulls the linkage ring 21 to rotate. The elastic element 22 changes shape, and the linkage ring 21 pulls the disassembly table 23 to move. The skewed wall 4 25 on the disassembly table 23 slowly approaches the skewed wall 5 26. The skewed wall 4 25 presses against the skewed wall 5 26, which in turn causes the traction column 15 to move upward. When the skewed wall 4 25 passes over the skewed wall 5 26, the lower wall surface of the traction column 15 contacts the upper wall surface of the disassembly table 23. At this moment, the traction column 15 is in the disassembly position, and the stop platform 24 contacts the disassembly table 23 and constrains it. At this moment, the insert 11 can be pulled out to achieve the purpose of rapid disassembly. After disassembly, the rotating ring 20 is released, and with the cooperation of the elastic element 22, the rotating ring 20 rotates back to its original position.

[0044] Example 3

[0045] Reference Figures 1 to 7 The difference from the above embodiment is that the connector assembly 4 also includes a pipe connection component and a line connection component installed inside the first fixed cylinder 5 and the second fixed cylinder 9, wherein the line connection component includes a power line connection component and a signal line connection component.

[0046] The pipe connection includes a lower insertion pipe 27 fixedly connected to the fixed cylinder 2 9 and an upper insertion pipe 28 fixedly connected to the fixed cylinder 1 5. One end of the lower insertion pipe 27 and the upper insertion pipe 28 are sealed to each other without gaps. The other end of the lower insertion pipe 27 is connected to the air-cooled pipe in the cable 3, and the other end of the upper insertion pipe 28 is connected to the air-cooled pipe in the handle 1.

[0047] The lower insertion tube 27 and the upper insertion tube 28 are connected by a plug-in method, which facilitates their disassembly and assembly, and in turn facilitates the disassembly and assembly of the cable 3 and the handle 1.

[0048] The power line connector and the signal line connector in this embodiment have the same structure. Therefore, this embodiment uses the power line connector as an example for explanation.

[0049] The power cord connector includes a vertical wire core 29 fixedly connected to the second fixed cylinder 9, a spiral wire core 30 fixedly connected to the first fixed cylinder 5, a pair of movable openings 34 pre-reserved on the inner circumferential surface of the second fixed cylinder 9, and a pair of vertical rods 36 fixed to the upper inner side of the first fixed cylinder 5. The spiral wire core 30 is sleeved on the outside of the vertical wire core 29, and the inner diameter of the spiral wire core 30 is larger than the outer diameter of the vertical wire core 29, which can ensure that the spiral wire core 30 can be quickly sleeved on the outside of the vertical wire core 29. Clamping blocks 3 are installed on both sides of the outer side of the spiral wire core 30. 1. A traction rod 32 is fixedly connected to the other side of the clamping block 31. The upper end of the traction rod 32 is fixedly connected to a wedge-shaped platform 33. The other end of the traction rod 32 is movably installed in the movable opening 34. Slider blocks are fixedly connected to the two side walls of the traction rod 32. Sliding grooves adapted to the sliders are reserved on the two side walls of the movable opening 34. The sum of the height of the wedge-shaped platform 33 and the height of the traction rod 32 is less than the height of the movable opening 34 to prevent the movement of the wedge-shaped platform 33 from being obstructed. The traction rod 32 is positioned along its length relative to the movable opening 34. Connected via elastic element 35, in the initial state, elastic element 35 is under compression, ensuring that the clamping block 31 is in a clamped state. The lower end of the vertical rod 36 is fixedly connected to the wedge-shaped platform 37 on the side facing the wedge-shaped platform 33. The pointed end of the wedge-shaped platform 37 faces the pointed end of the wedge-shaped platform 33, and the pointed end of the wedge-shaped platform 37 is between the pointed ends of the pair of wedge-shaped platforms 33, ensuring that when the wedge-shaped platform 37 moves downward, it can press the wedge-shaped platform 33 outward, thereby causing the pair of clamping blocks 31 to move. The clamping block 31 is kept away from movement so that the spiral core 30 is not obstructed during downward movement. The traction rod 32 has a vertical through-hole 38. The width of the through-hole 38 is equal to the width of the first wedge platform 33. The width of the through-hole 38 is greater than the sum of the widths of the vertical rod 36 and the second wedge platform 37. The second wedge platform 37 on the vertical rod 36 can pass through the through-hole 38, ensuring that the second wedge platform 37 can pass through the through-hole 38, while ensuring that the traction rod 32 can return to the initial position, thereby ensuring the clamping effect of the clamping block 31.

[0050] Before the connector assembly 4 is in the connection state, the fixing cylinder 5 on the handle 1 is aligned with the fixing cylinder 9 on the cable 3. The fixing cylinder 9 is slowly inserted into the fixing cylinder 5, and the wedge platform 37 slowly approaches the wedge platform 33. When the wedge platform 37 contacts the wedge platform 33 and then moves downward, under the action of the inclined wall of the wedge platform 33, the wedge platform 37 presses the wedge platform 33, causing it to move into the movable opening 34. At this moment, a pair of clamping blocks 31 open, the traction rod 32 presses the elastic element 35, and the upper end of the spiral core 30 is at the upper end of the vertical core 29. When the wedge platform 37 moves down to just enter the opening of the receiving opening 38, the lower end of the spiral core 30 is just fitted onto the upper end of the vertical core 29. The wedge platform 37 moves away from the wedge platform 33. Next, it moves downwards. Since the four sides of the receiving port 38 are vertical walls, the wedge-shaped platform 37 no longer presses the traction rod 32 to move into the movable port 34. Part of the spiral core 30 is fitted onto the vertical core 29. When the wedge-shaped platform 37 moves out of the receiving port 38, part of the spiral core 30 is above the clamping block 31, ensuring that there is a certain range of motion during disassembly to prevent the vertical core 29 from being pulled off during disassembly. The upper insertion tube 28 and the lower insertion tube 27 are inserted into place. With the cooperation of the elastic element 35, the traction rod 32 returns to its original position. The traction rod 32 causes the clamping block 31 to press against the outside of the spiral core 30. The inner surface of the spiral core 30 is in close contact with the outer surface of the vertical core 29, thereby achieving the purpose of quickly connecting the spiral core 30 and the vertical core 29.

[0051] When the connector assembly 4 is in the disassembled state, pull the fixing cylinder 5 upwards. The fixing cylinder 5 pulls the vertical rod 36 upwards. Under the action of the inclined wall of the wedge platform 37, the pulling rod 32 is compressed and moved. The wedge platform 37 slowly moves into the receiving port 38. At this moment, the clamping blocks 31 move away from each other, and the elastic element 35 is compressed. During this process, the upper end of the spiral core 30 is slowly straightened. When the wedge platform 37 is completely moved into the receiving port 38, the clamping block 31 is fully opened and the spiral core 30 is released. At this moment, the fixing cylinder 5 is pulled out directly, and the wedge platform 37 moves away from the receiving port 38. With the cooperation of the elastic element 35, the clamping block 31 returns to its position, completing the disassembly of the handle 1 and the cable 3. This facilitates the replacement of the handle 1 with the needle bar 2, reducing consumables and saving costs.

[0052] The specific implementation method is as follows: When replacing the handle 1 with the needle bar 2, the rotating ring 20 is rotated, which pulls the linkage ring 21 to rotate. The elastic element 22 changes shape, and the linkage ring 21 pulls the disassembly table 23 to move. The inclined wall 4 25 on the disassembly table 23 slowly approaches the inclined wall 5 26. The inclined wall 4 25 presses against the inclined wall 5 26, which in turn causes the traction column 15 to move upward. When the inclined wall 4 25 passes over the inclined wall 5 26, the lower wall surface of the traction column 15 contacts the upper wall surface of the disassembly table 23. At this moment, the traction column 15 is in the disassembly position, the stop platform 24 contacts the disassembly table 23 and constrains it, pulling the fixing cylinder 5 upward. The fixing cylinder 5 pulls the vertical rod 36 upward. Under the action of the inclined wall of the wedge platform 37, the traction rod 32 is pressed and moved, and the wedge platform 37 slowly moves into the receiving port 38. At this moment, the clamping blocks 31 move away from each other, and the elastic element 35 is compressed. During this process, the upper end of the spiral core 30 is slowly straightened. When the wedge platform 37 is completely moved into the receiving port 38, the clamping block 31 is fully opened and the spiral core 30 is released. At this moment, the fixed cylinder 5 is pulled out directly, and the wedge platform 37 moves away from the receiving port 38. With the cooperation of the elastic element 35, the clamping block 31 returns to its position, completing the disassembly of the handle 1 and the cable 3. After the disassembly is completed, the rotating ring 20 is released. With the cooperation of the elastic element 22, the rotating ring 20 is rotated back to its position.

[0053] Connect the new handle 1 with needle bar 2 to cable 3. Align the fixing cylinder 5 on handle 1 with the fixing cylinder 9 on cable 3. Slowly insert the fixing cylinder 9 into the fixing cylinder 5. The wedge platform 2 37 slowly approaches the wedge platform 1 33. When the wedge platform 2 37 contacts the wedge platform 1 33 and then moves downward, under the action of the inclined wall of the wedge platform 1 33, the wedge platform 2 37 presses the wedge platform 1 33, causing it to move into the movable opening 34. At this moment, a pair of clamping blocks 31 open, the traction rod 32 presses the elastic element 3 35, and the upper end of the spiral core 30 is perpendicular to the core 2. At the upper end of 9, when the second wedge platform 37 moves down to just enter the opening of the receiving port 38, the lower end of the spiral core 30 is just fitted onto the upper end of the vertical core 29. The second wedge platform 37 moves away from the first wedge platform 33 and then moves down. Since the four sides of the receiving port 38 are vertical walls, the second wedge platform 37 no longer presses the traction rod 32 to move into the movable opening 34. Part of the spiral core 30 is fitted onto the vertical core 29. When the second wedge platform 37 moves out of the receiving port 38, part of the spiral core 30 is above the clamping block 31, ensuring that during disassembly... A certain range of motion is allowed to prevent the vertical core 29 from being broken during disassembly. The upper insertion tube 28 and the lower insertion tube 27 are properly inserted into place. With the cooperation of the elastic element 35, the traction rod 32 returns to its original position. The traction rod 32 causes the clamping block 31 to press against the outside of the spiral core 30. The inner surface of the spiral core 30 is in close contact with the outer surface of the vertical core 29, thereby achieving rapid docking of the spiral core 30 and the vertical core 29. During the insertion of the fixing cylinder 1 5 on the handle 1 into the fixing cylinder 2 9 on the cable 3, the insertion cylinder 11 passes through the insertion port 6 and is inserted to the stop port. In step 7, part of the bead 13 is located outside the insert 11 and abuts against the inclined wall 8. At this moment, the elastic element 17 presses the stop ring 18 into the ring groove 16, keeping the traction column 15 in a static state. Then, the surface of the traction column 15 at the upper end of the avoidance opening 19 contacts the surface of the bead 13. The traction column 15 presses the bead 13 against the constraint opening 12, thereby constraining the insert 11 in the stop opening 7, that is, connecting the fixing ring 10 to the fixing cylinder 5. Then, the new handle 1 with the needle bar 2 is quickly connected to the cable 3, making the operation very convenient.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A replaceable connector air-cooled microwave ablation needle, comprising a handle, with a needle shaft attached to one end of the handle, characterized in that, The cable is connected to the handle via a connector assembly; The connector assembly includes a stop unit, which comprises a fixed cylinder one fixed to the handle and a fixed cylinder two fixed to the cable. The lower end of the fixed cylinder one has several circumferentially distributed insertion ports. The radius of the stop ports is larger than the radius of the insertion ports. The upper end of the insertion ports connects to the stop ports. A slanted wall one is installed at the junction of the insertion ports and the stop ports. The upper end of the fixed cylinder two can be inserted into the fixed cylinder one. A fixing ring is fixed to the outer side of the upper end of the fixed cylinder two. Several through-hole insertion cylinders are circumferentially fixed to the fixing ring. The insertion cylinders can pass through the insertion ports and be inserted into the stop ports. The insertion cylinders are positioned on the outer wall surface of the stop ports. Several constraint openings are provided, with the circumference of each opening arched. The ball is rolled and fastened within the constraint openings. The lower end of the insert has a slot that connects to the constraint opening. A traction post is movably installed in the slot. A ring groove is pre-reserved on the lower circumference of the slot. An elastic element is installed in the ring groove and is clamped to the outside of the traction post. A stop ring is movably installed at the lower end inside the ring groove and is fixedly connected to the traction post. Both ends of the elastic element are pressed tightly against the upper wall of the ring groove and the upper wall of the stop ring. An avoidance opening is pre-reserved on the outer circumference of the upper end of the traction post, allowing part of the ball to be retracted.

2. The gas-cooled microwave ablation needle with interchangeable connectors according to claim 1, characterized in that: The refuge opening has an isosceles trapezoidal structure, consisting of a sloping wall at the bottom, a vertical wall in the middle, and a sloping wall at the top.

3. The gas-cooled microwave ablation needle with interchangeable connectors according to claim 1, characterized in that: The connector assembly also includes an assisted disassembly unit, which includes a rotating ring that is rotatably fastened to the outer circumferential surface of the fixed cylinder two and a stop platform fixed to the lower end of the fixed ring. The upper end of the rotating ring is fixed to a linkage ring, and an elastic element two is installed between the linkage ring and the rotating ring. The elastic element two is clamped to the outer surface of the fixed cylinder two, and both ends of the elastic element two are fixed to the fixed cylinder two and the rotating ring, respectively. The upper end of the linkage ring is in contact with the fixed ring, and a disassembly platform is fixed to the lower wall surface inside the linkage ring. An inclined wall four is installed at the upper end of the disassembly platform, and an inclined wall five, which is directly opposite the inclined wall four, is installed at the lower end of the traction column. At the same time, the stop platform is located in a position directly opposite the inclined wall four.

4. The gas-cooled microwave ablation needle with interchangeable connectors according to claim 3, characterized in that: The connector assembly also includes pipe fittings installed inside the first and second fixed cylinders; The pipe connection includes a lower insertion pipe that is fixedly connected to the fixed cylinder and an upper insertion pipe that is fixedly connected to the fixed cylinder. One end of the lower insertion pipe and the upper insertion pipe are sealed to each other without gaps. The other end of the lower insertion pipe is connected to the air-cooled pipe in the cable, and the other end of the upper insertion pipe is connected to the air-cooled pipe in the handle.

5. The gas-cooled microwave ablation needle with interchangeable connectors according to claim 4, characterized in that: The connector assembly also includes wiring connectors installed inside the first and second fixed cylinders; The wiring connectors include power cable connectors and signal cable connectors; The power cord connector includes a vertical core fixed to the second fixed cylinder, a spiral core fixed to the first fixed cylinder, a pair of movable openings reserved on the inner circumferential surface of the second fixed cylinder, and a pair of vertical rods fixed to the upper inner side of the first fixed cylinder. Clamping blocks are installed on both sides of the outer side of the spiral core. A traction rod is fixed to the other side of the clamping blocks. The upper end of the traction rod is fixed to the first wedge platform. The other end of the traction rod is movably installed in the movable opening. The traction rod is connected to the movable opening along its length through the third elastic element. In the initial state, the third elastic element is under compression. The lower end of the vertical rod is fixed to the second wedge platform on the side facing the first wedge platform. A vertical through-hole is reserved on the traction rod, and the second wedge platform on the vertical rod can pass through the through-hole.

6. The gas-cooled microwave ablation needle with interchangeable connectors according to claim 5, characterized in that: The spiral core is sleeved on the outside of the vertical core, and the inner diameter of the spiral core is larger than the outer diameter of the vertical core.

7. The gas-cooled microwave ablation needle with interchangeable connectors according to claim 5, characterized in that: Slider blocks are fixed to the two side walls of the traction rod, and grooves that match the sliders are reserved on the two side walls of the movable opening.

8. The gas-cooled microwave ablation needle with interchangeable connectors according to claim 5, characterized in that: The sum of the height of the wedge platform and the height of the traction rod is less than the height of the movable opening.

9. A replaceable connector air-cooled microwave ablation needle according to claim 5, characterized in that: The pointed end of wedge two faces the pointed end of wedge one, and the pointed end of wedge two is located between the pointed ends of a pair of wedge one.

10. A gas-cooled microwave ablation needle with a replaceable connector according to claim 5, characterized in that: The width of the receiving opening is equal to the width of wedge-shaped platform one, and the width of the receiving opening is greater than the sum of the widths of the vertical rod and wedge-shaped platform two.

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