Heat shrink sleeve cutting jig for ablation needle surface

Abstract

The utility model discloses an ablation needle surface heat shrink sleeve cutting jig, the top between the shaft rod of utility model discloses and the top wall of accommodating groove is connected through elastic part, the installation block of annular cutter head is rotatably installed with the adjusting gap between connecting seat in bottom, the upper surface of bottom plate is provided with the first mounting seat of top opening first arc slot, the second mounting seat of top opening second arc slot, the first arc slot for ablation needle placement, second arc slot is coaxial arrangement, is located below first arc slot and is opened in the top of first mounting seat with one first recess that is installed with two driving rollers, is located below second arc slot and is opened in the top of second mounting seat with one second recess that is rotatably installed with two driven rollers. The ablation needle surface heat shrink sleeve cutting jig of utility model can cut the multiple of ablation needle simultaneously, also avoided the situation that the needle body is damaged due to excessive cutting, also avoided the situation that heat shrink sleeve is not cut completely, improved the cutting effect.

Description

Technical Field

[0001] This invention relates to a heat shrink tubing cutting fixture for the surface of an ablation needle, belonging to the technical field of heat shrink tubing cutting fixtures. Background Technology

[0002] Some ablation needles are quite long and have a small diameter, making them prone to breakage. Therefore, existing technologies often use heat-shrink tubing on the outer surface of the ablation needle to improve its toughness and structural strength. Heat-shrink tubing offers advantages such as high-temperature shrinkage, flexibility, flame retardancy, insulation, and corrosion resistance, and is widely used for insulation protection of various wire harnesses, solder joints, and inductors, as well as for rust and corrosion prevention of metal tubes and rods. Common types of heat-shrink tubing include PVC heat-shrink tubing, PET heat-shrink tubing, and adhesive-impregnated heat-shrink tubing.

[0003] Currently, during the manufacturing process, heat shrink tubing is pre-shrunk and fitted onto the radiofrequency needle. The length of this heat shrink tubing is generally longer than the length of the ablation needle. Subsequently, the excess heat shrink tubing on the ablation needle needs to be cut off. Existing technology uses corresponding cutting equipment to cut the heat shrink tubing on the surface of the ablation needle. The cutting head used for heat shrink tubing cutting is generally fixed on the drive mechanism of the cutting equipment and moves to the corresponding position of the ablation needle for cutting. However, the ablation needle is thin, long, and has a conical structure, making it difficult to fix. When cutting the heat shrink tubing on the surface of thin and long ablation needles, the annular cutting head makes hard contact with the needle body, which makes the needle body easily damaged. Moreover, the cutting head position needs to be adjusted multiple times during the movement to adapt to the diameter changes of the ablation needle, which places higher demands on the adjustment precision. The operation is cumbersome and can easily cause over-cutting that damages the needle body or incomplete cutting of the heat shrink tubing, resulting in poor cutting effect. Summary of the Invention

[0004] The purpose of this invention is to provide a heat shrink tubing cutting fixture for the surface of an ablation needle. This heat shrink tubing cutting fixture for the surface of an ablation needle has a simple structure and is easy to operate. It not only improves the positional accuracy of the ablation needle, but also allows for simultaneous cutting of multiple parts of the ablation needle. It also avoids damage to the needle body due to over-cutting and avoids the situation where the heat shrink tubing is not completely cut through, thus improving the cutting effect.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a heat shrink tubing cutting fixture for cutting the heat shrink tubing sleeved on the outer wall of the ablation needle. The ablation needle has a conical structure and includes: a base plate, a top plate disposed above the base plate, a support seat disposed on one side of the top plate and on the base plate, a vertical drive mechanism with a movable end connected to the top plate mounted on the support seat, a plurality of connecting seats connected to the lower surface of the top plate, a receiving groove disposed vertically inside the connecting seat, and the receiving groove being connected to the bottom surface of the connecting seat, a mounting block with a shaft at the top disposed below the connecting seat, the top of the shaft being connected to the top wall of the receiving groove by an elastic element, and an adjusting gap being provided between the mounting block with a ring-shaped cutter head rotatably mounted at the bottom and the connecting seat. The upper surface of the base plate is provided with a first mounting seat with a first arc-shaped groove on the top and a second mounting seat with a second arc-shaped groove on the top. The first arc-shaped groove and the second arc-shaped groove for placing the ablation needle are arranged in a coaxial manner. A first groove with two active rollers is opened at the top of the first mounting seat below the first arc-shaped groove. A second groove with two driven rollers rotatably installed inside is opened at the top of the second mounting seat below the second arc-shaped groove. The active rollers and driven rollers are both arranged parallel to the ablation needle.

[0006] The following are further improvements to the above technical solution: 1. In the above solution, a first pressing block is provided on one side of the first groove and on the top of the first mounting base, and a second pressing block is provided on one side of the first groove and on the top of the second mounting base. The first pressing block has a first pressing groove that cooperates with the first arc-shaped groove, and the second pressing block has a second pressing groove that cooperates with the second arc-shaped groove.

[0007] 2. In the above scheme, a second support is installed on the upper surface of the base plate. The second support is threadedly connected to a vertically arranged rotating handle, and the upper end of the rotating handle has a top rod connected to the top plate.

[0008] 4. In the above scheme, the lower surface of the top plate is provided with a limiting groove for the top rod to be inserted.

[0009] 5. In the above scheme, a first fixing seat and a second fixing seat are provided on the lower surface of the top plate, and a fixing sleeve is provided between the two first fixing seats and the second fixing seat. A plurality of connecting seats are provided on the circumferential outer wall of the fixing sleeve.

[0010] 6. In the above scheme, a motor for driving the active roller is provided on the outer wall of the first mounting base.

[0011] 7. In the above scheme, a bushing is provided between the inner wall of the receiving groove and the circumferential outer wall of the shaft, and the shaft can slide up and down along the inner wall of the bushing.

[0012] 8. In the above scheme, a number of support columns are provided between the top plate and the bottom plate, and a number of guide rods that are slidably connected to the support columns are provided at the bottom of the top plate.

[0013] 9. In the above scheme, the bottom of the support column is installed on the upper surface of the base plate, and the top of the support column is equipped with a sleeve that cooperates with the guide rod.

[0014] 10. In the above scheme, guide rods are provided at each corner of the top plate.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The present invention relates to a heat-shrinkable sleeve cutting fixture for the surface of an ablation needle. The top of its shaft is connected to the top wall of the receiving groove via an elastic element. An adjustable gap exists between the mounting block, on which a ring-shaped cutter head is rotatably mounted, and the connecting seat. A first arc-shaped groove and a second arc-shaped groove for placing the ablation needle are coaxially arranged. A first groove with two active rollers is located below the first arc-shaped groove and on the top of the first mounting seat. A second groove with two driven rollers rotatably mounted inside is located below the second arc-shaped groove and on the top of the second mounting seat. Placing the conical ablation needle on the coaxially arranged first and second arc-shaped grooves allows for initial positioning of the ablation needle. The ring-shaped cutter head then elastically presses against the ablation needle with the heat-shrinkable sleeve. The head, two active rollers inside the first groove, and two driven rollers inside the second groove work together to fix the ablation needle. This also accommodates the conical ablation needle, maintaining the continuous pressure of the annular cutter head on the heat shrink tubing. The active rollers drive the ablation needle, which is fitted with the heat shrink tubing, to rotate. The annular cutter head, pressing on the heat shrink tubing, cuts the tubing, achieving passive cutting of the heat shrink tubing. This design is simple in structure and easy to operate, reducing the deflection of the ablation needle during rotation, improving the positional accuracy of the ablation needle, avoiding damage to the ablation needle due to hard contact, and allowing simultaneous cutting of multiple points on the ablation needle. It also avoids over-cutting that could damage the needle body and prevents the heat shrink tubing from being completely cut through, thus improving the cutting effect.

[0016] 2. The heat shrink tubing cutting fixture on the surface of the ablation needle of the present invention has a first pressing block located on one side of the first groove and on the top of the first mounting base, and a second pressing block located on one side of the first groove and on the top of the second mounting base. The first pressing block has a first pressing groove that mates with the first arc-shaped groove, and the second pressing block has a second pressing groove that mates with the second arc-shaped groove. By pressing the first pressing block with the first pressing groove and the second pressing block with the second pressing groove onto the first mounting base and the second mounting base respectively, the ablation needle with the heat shrink tubing is prevented from shifting under the pressure of the annular cutter head, which greatly improves the positional accuracy of the ablation needle. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the overall structure of the heat shrink tubing cutting fixture on the surface of the ablation needle of the present invention; Appendix Figure 2 Appendix to this invention Figure 1 Enlarged view of point A; Appendix Figure 3 This is a three-dimensional cross-sectional view of the heat shrink tubing cutting fixture on the surface of the ablation needle of the present invention. Appendix Figure 4 Appendix to this invention Figure 3 Enlarged view of point B; Appendix Figure 5 This is a partial structural schematic diagram of the heat shrink tubing cutting fixture on the surface of the ablation needle of the present invention; Appendix Figure 6 This is a partial cross-sectional schematic diagram of the heat shrink tubing cutting fixture on the surface of the ablation needle of the present invention.

[0018] In the attached diagrams: 100, ablation needle; 200, heat shrink tubing; 1, base plate; 2, top plate; 201, limiting groove; 3, support base; 4, vertical drive mechanism; 5, support column; 6, guide rod; 7, sleeve; 81, first fixed base; 82, second fixed base; 9, fixed sleeve; 10, annular cutter head; 11, connecting base; 12, first mounting base; 13, first arc groove; 14, first groove; 15, active roller. 16. Wheel; 17. Mounting block; 18. Shaft; 19. Second guide rod; 20. Bushing; 21. Elastic element; 22. Second mounting seat; 23. Second arc groove; 24. Motor; 25. First pressure block; 26. Second pressure block; 27. First pressure groove; 28. Second pressure groove; 29. ​​Second groove; 20. Driven roller; 21. Second support seat; 22. Second motor; 23. Rotary handle; 24. Top rod. Detailed Implementation

[0019] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0020] Example 1: A heat shrink tubing cutting fixture for the surface of an ablation needle, used to cut the heat shrink tubing 200 sleeved on the outer wall of the ablation needle 100. The ablation needle 100 has a conical structure and includes: a base plate 1, a top plate 2 disposed above the base plate 1, and a support seat 3 disposed on one side of the top plate 2 and on the base plate 1. In use, the ablation needle fitted with a heat shrink tubing is placed on the first mounting base and the second mounting base. Under the action of gravity, the ablation needle is located inside the first arc groove of the first mounting base and the second arc groove of the second mounting base. The vertical drive mechanism is controlled to drive the top plate to move down, so that the annular cutter head on the connecting base presses on the ablation needle, and the ablation needle is fixed by the cutter head, the active roller and the driven roller. A vertical drive mechanism 4 with its movable end connected to the top plate 2 is installed on the support base 3. Several connecting seats 11 are connected to the lower surface of the top plate 2. A receiving groove 111 is vertically arranged inside the connecting seat 11, and the receiving groove 111 is connected to the bottom surface of the connecting seat 11. A mounting block 16 with a shaft 17 at the top is arranged below the connecting seat 11. The top of the shaft 17 is connected to the top wall of the receiving groove 111 by an elastic element 19. An adjustable gap is provided between the mounting block 16, which has a ring cutter head 10 rotatably mounted at the bottom, and the connecting seat 11. Next, the motor drives the active roller to rotate, and the active roller drives the ablation needle with heat shrink tubing to rotate. During the rotation, the ablation needle and heat shrink tubing drive the two driven rollers to rotate. The annular cutter head pressing on the ablation needle cuts off the heat shrink tubing on the surface of the ablation needle, thereby removing the excess heat shrink tubing. The upper surface of the base plate 1 is provided with a first mounting seat 12 with a first arc-shaped groove 13 on the top and a second mounting seat 20 with a second arc-shaped groove 21 on the top. The first arc-shaped groove 13 and the second arc-shaped groove 21 for placing the ablation needle 100 are arranged in a coaxial manner. A first groove 14 with two active rollers 15 is provided below the first arc-shaped groove 13 and on the top of the first mounting seat 12. A second groove 25 with two driven rollers 26 rotatably installed inside is provided below the second arc-shaped groove 21 and on the top of the second mounting seat 20. The active rollers 15 and the driven rollers 26 are both arranged parallel to the ablation needle 100.

[0021] A first pressing block 231 is provided on one side of the first groove 14 and on the top of the first mounting base 12, and a second pressing block 232 is provided on one side of the first groove 14 and on the top of the second mounting base 20. The first pressing block 231 has a first pressing groove 241 that cooperates with the first arc-shaped groove 13, and the second pressing block 232 has a second pressing groove 242 that cooperates with the second arc-shaped groove 21.

[0022] A second support seat 27 is installed on the upper surface of the base plate 1. The second support seat 27 is threadedly connected to a vertically arranged rotating handle 29, and the upper end of the rotating handle 29 has a top rod 30 connected to the top plate 2. A limiting groove 201 for the top rod 30 to be inserted is provided on the lower surface of the top plate 2.

[0023] Before the vertical drive mechanism drives the top plate to descend, the rotating handle is turned according to the diameter of the ablation needle, which drives the push rod to move in the vertical direction to adjust the height of the push rod. The push rod is embedded in the limiting groove of the top plate, which can limit the descent position of the top plate, avoid damage to the ablation needle caused by excessive descent of the top plate, and also help improve the positional accuracy of the top plate during the up and down movement, and avoid the top plate offset affecting the position of the cutter head.

[0024] A first fixing seat 81 and a second fixing seat 82 are provided on the lower surface of the top plate 2, and a fixing sleeve 9 is provided between the two first fixing seats 81 and the second fixing seat 82. Several connecting seats 11 are provided on the circumferential outer wall of the fixing sleeve 9.

[0025] A motor 22 for driving the drive roller 15 is provided on the outer wall of the first mounting base 12.

[0026] A bushing 18 is provided between the inner wall of the accommodating groove 111 and the circumferential outer wall of the shaft 17, and the shaft 17 can slide up and down along the inner wall of the bushing 18.

[0027] A number of support columns 5 are provided between the top plate 2 and the bottom plate 1, and a number of guide rods 6 that are slidably connected to the support columns 5 are provided at the bottom of the top plate 2.

[0028] One end of the first pressure block 231 is rotatably connected to the first mounting base 2 via a rotating shaft, and the other end of the first pressure block 231 is connected to the first mounting base 2 via bolts; a second motor 28 for driving the rotating shaft is respectively provided on the side wall of the first mounting base 12. This second motor 28 is a servo motor; the rotating shaft can be driven by the second motor to rotate and drive the first pressure block to press on the first mounting base, so that the ablation needle with the heat shrink tubing is located between the first pressure groove and the first arc groove; The second pressure block 232 is detachably mounted on the second mounting base 20 by bolts. The second pressure groove of the second pressure block and the second arc groove cooperate to fix the ablation needle with the heat shrink tubing.

[0029] The diameter of one end of the ablation needle 100 is 2.05 mm, and the diameter of the other end is 0.95 mm.

[0030] The length of the ablation needle 100 is 200 mm.

[0031] Example 2: A heat shrink tubing cutting fixture for cutting heat shrink tubing 200 sleeved on the outer wall of ablation needle 100. The ablation needle 100 has a conical structure and includes: a base plate 1, a top plate 2 disposed above the base plate 1, a support seat 3 disposed on one side of the top plate 2 and on the base plate 1, a vertical drive mechanism 4 with a movable end connected to the top plate 2 mounted on the support seat 3, a plurality of connecting seats 11 connected to the lower surface of the top plate 2, a receiving groove 111 disposed vertically inside the connecting seat 11, and the receiving groove 111 being connected to the bottom surface of the connecting seat 11, a mounting block 16 with a shaft 17 at the top disposed below the connecting seat 11, the top of the shaft 17 being connected to the top wall of the receiving groove 111 by an elastic element 19, and an adjusting gap between the mounting block 16 with an annular cutter head 10 rotatably mounted at the bottom and the connecting seat 11. By placing the conical ablation needle on the coaxially arranged first and second arc-shaped grooves, the ablation needle can be initially positioned. The ring-shaped cutter head is elastically pressed onto the ablation needle with the heat shrink tubing. The ring-shaped cutter head, the two active rollers inside the first groove, and the two driven rollers inside the second groove work together to fix the ablation needle. It can also adapt to the conical ablation needle to maintain the ring-shaped cutter head continuously pressing on the heat shrink tubing. Then, the active rollers drive the ablation needle with the heat shrink tubing to rotate, and the ring-shaped cutter head pressing on the heat shrink tubing cuts the heat shrink tubing. The upper surface of the base plate 1 is provided with a first mounting seat 12 with a first arc-shaped groove 13 on the top and a second mounting seat 20 with a second arc-shaped groove 21 on the top. The first arc-shaped groove 13 and the second arc-shaped groove 21 for placing the ablation needle 100 are arranged in a coaxial manner. A first groove 14 with two active rollers 15 is provided below the first arc-shaped groove 13 and on the top of the first mounting seat 12. A second groove 25 with two driven rollers 26 rotatably installed inside is provided below the second arc-shaped groove 21 and on the top of the second mounting seat 20. The active rollers 15 and the driven rollers 26 are both arranged parallel to the ablation needle 100.

[0032] It achieves passive cutting of heat shrink tubing, and has a simple structure and convenient operation. It reduces the bending of the ablation needle during rotation, improves the positional accuracy of the ablation needle, avoids the situation where the ablation needle is crushed due to hard contact, and can cut multiple parts of the ablation needle at the same time. It also avoids the situation where the needle body is damaged due to over-cutting, and avoids the situation where the heat shrink tubing is not completely cut through, thus improving the cutting effect. A first pressing block 231 is provided on one side of the first groove 14 and on the top of the first mounting base 12, and a second pressing block 232 is provided on one side of the first groove 14 and on the top of the second mounting base 20. The first pressing block 231 has a first pressing groove 241 that cooperates with the first arc-shaped groove 13, and the second pressing block 232 has a second pressing groove 242 that cooperates with the second arc-shaped groove 21.

[0033] By pressing the first pressing block with the first pressing groove and the second pressing block with the second pressing groove onto the first mounting base and the second mounting base respectively, the displacement of the ablation needle fitted with the heat shrink tubing is avoided under the pressing of the annular cutter head, which greatly improves the positional accuracy of the ablation needle. A second support seat 27 is installed on the upper surface of the base plate 1. The second support seat 27 is threadedly connected to a vertically arranged rotating handle 29. The upper end of the rotating handle 29 has a push rod 30 connected to the top plate 2, which can limit the downward position of the top plate, avoid excessive downward movement of the top plate and damage to the ablation needle, and also help improve the positional accuracy of the top plate during the up and down movement, and avoid the top plate offset affecting the position of the cutter head.

[0034] A first fixing seat 81 and a second fixing seat 82 are provided on the lower surface of the top plate 2, and a fixing sleeve 9 is provided between the two first fixing seats 81 and the second fixing seat 82. Several connecting seats 11 are provided on the circumferential outer wall of the fixing sleeve 9.

[0035] A motor 22 for driving the drive roller 15 is provided on the outer wall of the first mounting base 12.

[0036] Several support columns 5 are provided between the top plate 2 and the bottom plate 1, and several guide rods 6 are provided at the bottom of the top plate 2 and are slidably connected to the support columns 5. The bottom of the support column 5 is installed on the upper surface of the bottom plate 1, and a sleeve 7 that cooperates with the guide rods 6 is installed at the top of the support column 5. Guide rods 6 are provided at each corner of the top plate 2. During the up and down movement of the top plate, the guide rods cooperate with the support columns and sleeves, which greatly improves the positional accuracy of the top plate movement and is beneficial to improving the positional accuracy of the annular cutter.

[0037] The first pressure block 231 is detachably mounted on the first mounting base 2 by bolts.

[0038] The aforementioned second pressure block 232 is detachably mounted on the second mounting base 20 by bolts.

[0039] The diameter of one end of the ablation needle 100 is 2.95 mm, and the diameter of the other end is 1.05 mm.

[0040] The length of the ablation needle 100 is 500 mm.

[0041] The working principle is as follows: In use, the ablation needle fitted with a heat shrink tubing is placed on the first mounting base and the second mounting base. Under the action of gravity, the ablation needle is located inside the first arc groove of the first mounting base and the second arc groove of the second mounting base. The vertical drive mechanism is controlled to drive the top plate to move down, so that the annular cutter head on the connecting base presses on the ablation needle, and the ablation needle is fixed by the cutter head, the active roller and the driven roller. Next, the motor drives the active roller to rotate, and the active roller drives the ablation needle with heat shrink tubing to rotate. During the rotation, the ablation needle and heat shrink tubing drive the two driven rollers to rotate. The annular cutter head pressing on the ablation needle cuts off the heat shrink tubing on the surface of the ablation needle, thereby removing the excess heat shrink tubing. Before the vertical drive mechanism drives the top plate to descend, the rotating handle is turned according to the diameter of the ablation needle, which drives the push rod to move in the vertical direction to adjust the height of the push rod. The push rod is embedded in the limiting groove of the top plate, which can limit the descent position of the top plate, avoid damage to the ablation needle caused by excessive descent of the top plate, and also help improve the positional accuracy of the top plate during the up and down movement, and avoid the top plate offset affecting the position of the cutter head.

[0042] When using the heat shrink tubing cutting fixture on the surface of the ablation needle, passive cutting of the heat shrink tubing is achieved. It has a simple structure and is easy to operate. It reduces the bending of the ablation needle during rotation, improves the positional accuracy of the ablation needle, avoids damage to the ablation needle due to hard contact, and can cut multiple parts of the ablation needle at the same time. It also avoids damage to the needle body due to over-cutting and avoids incomplete cutting of the heat shrink tubing due to insufficient pressure between the annular cutter head and the ablation needle, thus improving the cutting effect. Furthermore, by pressing the first pressing block with the first pressing groove and the second pressing block with the second pressing groove onto the first mounting base and the second mounting base respectively, it avoids the situation where the ablation needle with the heat shrink tubing is displaced under the pressing of the annular cutter head, which greatly improves the positional accuracy of the ablation needle. Furthermore, it can limit the downward position of the top plate, preventing excessive descent of the top plate from damaging the ablation needle. It also helps to improve the positional accuracy of the top plate during its up-and-down movement, preventing top plate offset from affecting the position of the cutting head.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A heat shrink tubing cutting fixture for the surface of an ablation needle, used to cut a heat shrink tubing (200) fitted onto the outer wall of an ablation needle (100), wherein the ablation needle (100) has a conical structure, comprising: The base plate (1) and the top plate (2) located above the base plate (1) are characterized in that: a support seat (3) is provided on one side of the top plate (2) and on the base plate (1), a vertical drive mechanism (4) with a movable end connected to the top plate (2) is installed on the support seat (3), a plurality of connecting seats (11) are connected to the lower surface of the top plate (2), a receiving groove (111) is provided vertically inside the connecting seat (11), and the receiving groove (111) is connected to the bottom surface of the connecting seat (11), and a mounting block (16) with a shaft (17) on the top is provided below the connecting seat (11), the top of the shaft (17) is connected to the top wall of the receiving groove (111) by an elastic element (19), and an adjustment gap is provided between the mounting block (16) with a ring cutter head (10) rotatably installed at the bottom and the connecting seat (11); The upper surface of the base plate (1) is provided with a first mounting seat (12) with a first arc groove (13) on the top and a second mounting seat (20) with a second arc groove (21) on the top. The first arc groove (13) and the second arc groove (21) for placing the ablation needle (100) are arranged in a coaxial manner. A first groove (14) with two active rollers (15) is opened below the first arc groove (13) and on the top of the first mounting seat (12). A second groove (25) with two driven rollers (26) is opened below the second arc groove (21) and on the top of the second mounting seat (20). The active rollers (15) and the driven rollers (26) are both arranged parallel to the ablation needle (100).

2. The heat-shrinkable sleeve cutting fixture for the ablation needle surface according to claim 1, characterized in that: A first pressing block (231) is provided on one side of the first groove (14) and on the top of the first mounting base (12), and a second pressing block (232) is provided on one side of the first groove (14) and on the top of the second mounting base (20). The first pressing block (231) has a first pressing groove (241) that cooperates with the first arc groove (13), and the second pressing block (232) has a second pressing groove (242) that cooperates with the second arc groove (21).

3. The heat-shrinkable sleeve cutting fixture for the surface of the ablation needle according to claim 1 or 2, characterized in that: A second support seat (27) is installed on the upper surface of the base plate (1). The second support seat (27) is threadedly connected to a vertically arranged rotating handle (29), and the upper end of the rotating handle (29) has a top rod (30) connected to the top plate (2).

4. The heat-shrinkable sleeve cutting fixture for the ablation needle surface according to claim 3, characterized in that: The lower surface of the top plate (2) is provided with a limiting groove (201) for the top rod (30) to be inserted.

5. The heat-shrinkable sleeve cutting fixture for the ablation needle surface according to claim 1, characterized in that: A first fixing seat (81) and a second fixing seat (82) are provided on the lower surface of the top plate (2), and a fixing sleeve (9) is provided between the two first fixing seats (81) and the second fixing seat (82). Several connecting seats (11) are provided on the circumferential outer wall of the fixing sleeve (9).

6. The heat-shrinkable sleeve cutting fixture for the surface of the ablation needle according to claim 1, characterized in that: A motor (22) for driving the active roller (15) is provided on the outer wall of the first mounting base (12).

7. The heat-shrinkable sleeve cutting fixture for the ablation needle surface according to claim 1, characterized in that: A bushing (18) is provided between the inner wall of the receiving groove (111) and the circumferential outer wall of the shaft (17), and the shaft (17) can slide up and down along the inner wall of the bushing (18).

8. The heat-shrinkable sleeve cutting fixture for the surface of the ablation needle according to claim 1, characterized in that: A number of support columns (5) are provided between the top plate (2) and the bottom plate (1), and a number of guide rods (6) that are slidably connected to the support columns (5) are provided at the bottom of the top plate (2).

9. The heat-shrinkable sleeve cutting fixture for the surface of the ablation needle according to claim 8, characterized in that: The bottom of the support column (5) is mounted on the upper surface of the base plate (1), and the top of the support column (5) is mounted with a sleeve (7) that cooperates with the guide rod (6).

10. The heat-shrinkable sleeve cutting fixture for the surface of the ablation needle according to claim 8, characterized in that: Guide rods (6) are provided at each corner of the top plate (2).

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