Ablation electrode

Abstract

The utility model discloses an ablation electrode which comprises an insulating shell. The fixing sleeve is connected in the end part of the insulating shell; one end of the positioning sleeve is inserted into the fixing sleeve and connected with the fixing sleeve in a buckled mode, the other end of the positioning sleeve is located outside the insulating shell, a plurality of limiting holes distributed in the circumferential direction of the positioning sleeve are formed in the side wall of the positioning sleeve, the limiting holes are located in the insulating shell and located outside the fixing sleeve, and first balls are arranged in the limiting holes; the push sleeve sleeves the positioning sleeve and is elastically connected with the positioning sleeve, one end of the push sleeve is close to the fixing sleeve, the inner side wall of the push sleeve is in contact with the ball I, and the other end of the push sleeve is far away from the fixing sleeve and is positioned outside the insulating shell; one end of the electrode tool bit sequentially penetrates through the positioning sleeve and the fixing sleeve and then is located in the insulating shell, the other end of the electrode tool bit is located outside the positioning sleeve, and a plurality of first limiting grooves matched with the first balls are formed in the outer side wall of the electrode tool bit. The utility model has the beneficial effects that the electrode cutter head is convenient to replace; the direction of the electrode cutter head is adjusted, and the flexibility and convenience of an operation are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of ablation electrodes, and in particular to an ablation electrode. Background Technology

[0002] Ablation electrodes are surgical devices used in surgical procedures. Their main functions include cutting, hemostasis, irrigation, and suction of tissue during surgery. They work by using a high-frequency current to generate heat through the electrode tip, causing the tip to act on the tissue to produce eschar or burst, thus achieving the functions of hemostasis or cutting. Ablation electrodes are currently widely used in minimally invasive abdominal surgery.

[0003] Most existing ablation electrodes are fixed or telescopic electrodes. In most ablation electrodes, the electrode tip is directly fixed (usually welded) to the end of the conductive tube of the ablation electrode, which makes it difficult to replace the electrode tip. Therefore, improvements are needed. Utility Model Content

[0004] The present invention aims to overcome the shortcomings of existing technologies where the electrode tip is difficult to replace, and provides an ablation electrode with an easy-to-replace electrode tip.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An ablation electrode comprising:

[0007] Insulating housing;

[0008] A fixing sleeve is attached to the end of the insulating housing;

[0009] A positioning sleeve, one end of which is inserted into the fixing sleeve and snapped together with the fixing sleeve, and the other end of which is located outside the insulating shell. The side wall of the positioning sleeve is provided with a plurality of limiting holes evenly distributed along its circumference. The limiting holes are located inside the insulating shell and outside the fixing sleeve. A ball is provided in the limiting hole.

[0010] The push sleeve is fitted onto the outer wall of the positioning sleeve and is elastically connected to the positioning sleeve along the length of the insulating shell. One end of the push sleeve is close to the fixing sleeve and its inner sidewall is in contact with the ball. The other end of the push sleeve is away from the fixing sleeve and is located outside the insulating shell.

[0011] The electrode tip has one end that passes through the positioning sleeve and the fixing sleeve in sequence and is located inside the insulating shell, while the other end is located outside the positioning sleeve. Several limiting grooves are provided on its outer side wall, each matching a ball. The ball is limited to the corresponding limiting groove under the action of the push sleeve. In the initial state, under the elastic action, the end of the push sleeve closest to the fixed sleeve is located inside the insulating shell, and its inner sidewall simultaneously acts on the ball bearings in several limiting holes, causing the ball bearings to engage in the limiting grooves, thus fixing the electrode tip. When the electrode tip needs to be replaced, the operator overcomes the elastic action and pulls the push sleeve outward, separating the push sleeve from the ball bearings. The ball bearings lose the limiting effect of the push sleeve, allowing the electrode tip to be pulled out, thus disassembling it. When installing a new electrode tip, the operator similarly pulls the push sleeve outward, separating it from the ball bearings, and then inserts the electrode tip. Under the elastic reset action, the push sleeve inserts into the insulating shell, causing it to again act on the ball bearings in several limiting holes, causing the ball bearings to engage in the corresponding limiting grooves, thus fixing the electrode tip. Therefore, this solution only requires inserting and removing the push sleeve to achieve quick replacement of the electrode tip, making the operation simple and achieving the goal of facilitating electrode tip replacement.

[0012] Preferably, the positioning sleeve has a limiting block fixedly protruding outward from the outer wall of one end outside the insulating shell. The inner wall of the push sleeve, away from the fixed sleeve, has a second limiting groove. The bottom of the second limiting groove is close to the fixed sleeve, and the opening end of the second limiting groove is away from the fixed sleeve. A spring is fitted onto the outer wall of the positioning sleeve, located within the second limiting groove. One end of the spring is connected to the limiting block, and the other end is connected to the bottom of the second limiting groove. The push sleeve is elastically connected to the positioning sleeve via the spring. The spring is positioned between the limiting block and the bottom of the second limiting groove. The spring allows the push sleeve to simultaneously clamp several balls in the limiting holes through its inner wall, thus positioning the balls within the corresponding second limiting grooves, fixing the electrode tip, and facilitating the operator's disassembly of the electrode tip.

[0013] Preferably, the insulating housing includes an outer shell and an inner shell. One end of the outer shell has a cavity, and the other end of the outer shell has a mounting groove. The limiting hole is located inside the opening end of the mounting groove. The end of the push sleeve near the fixed sleeve is located inside the opening end of the mounting groove, and its inner sidewall has an inclined guide opening. The bottom of the mounting groove has a positioning device and a through hole matching the inner shell. The positioning device is located on the side of the through hole and is fixedly connected to the bottom of the mounting groove. The fixed sleeve is rotatably connected to the mounting groove. One end of the fixed sleeve matches the inner shell and has several positioning grooves, each matching the positioning device. The several positioning grooves are evenly distributed circumferentially around the inner shell at the end of the fixed sleeve. One end of the inner shell is confined within the cavity. The other end of the inner shell passes through the through hole and is confined within one end of the fixed sleeve. One end of the positioning sleeve is inserted into the other end of the fixed sleeve and is snapped into the fixed sleeve. One end of the electrode tip passes through the positioning sleeve and the fixed sleeve in sequence and is located inside the inner shell. The guide opening facilitates the insertion of the push sleeve into the mounting groove, which then positions the ball in the corresponding limiting groove, providing excellent guidance. When it is necessary to change the direction of the electrode tip, the operator only needs to rotate the push sleeve, which allows the positioning sleeve, fixing sleeve, and electrode tip to rotate as a whole. When the electrode tip rotates to the appropriate position, the positioning device embeds into the corresponding positioning groove, positioning the fixing sleeve and preventing the electrode tip from deflecting during operation. Thus, the direction of the electrode tip can be adjusted, improving the flexibility and convenience of the surgery.

[0014] Preferably, the positioning device includes a housing, which is fixedly connected to the bottom of the mounting groove. A groove is provided at one end of the housing, and a second spring and a second ball bearing matching the positioning groove are disposed within the groove. One end of the second spring is connected to the bottom of the groove, and the other end of the second spring contacts the second ball bearing. The second ball bearing is located within the opening end of the groove and is limited to being within the positioning groove under the action of the second spring. When the electrode tip rotates, the second ball bearing, under the elastic action of the second spring, sequentially engages with the corresponding positioning groove until the electrode tip rotates to the appropriate position. The second ball bearing, in cooperation with the corresponding positioning groove, fixes the electrode tip, resulting in a simple and easy-to-operate structure.

[0015] Preferably, the outer casing houses a circuit board located on its inner side and detachably connected to both the outer casing and the inner shell. The circuit board has an operation button, and the outer casing has a through-hole matching the operation button. The bottom of the operation button is located inside the outer casing and electrically connected to the circuit board, while the top of the operation button extends through the through-hole and is located outside the outer casing. The electrode tip is electrically connected to the circuit board. The operator operates the electrode tip via the operation button and controls its operation via the circuit board.

[0016] Preferably, a crown spring is fitted onto the electrode tip, and the crown spring is confined within the inner shell. The crown spring helps improve the stability of the electrode tip and helps ensure its coaxiality with the fixing sleeve.

[0017] Preferably, the outer wall of the fixing sleeve is provided with an annular groove, and a protrusion matching the annular groove is fixed on the side wall of the mounting groove. The fixing sleeve is rotatably connected to the mounting groove through the matching of the annular groove and the protrusion. The matching of the fixing sleeve with the protrusion through the annular groove facilitates the axial positioning of the fixing sleeve and the rotation of the fixing sleeve, thereby realizing the change of the direction of the electrode tip.

[0018] Preferably, the outer wall of the push sleeve near the fixed sleeve is provided with an L-shaped groove that matches the end of the outer shell. This serves to limit the movement of the push sleeve and also improves the aesthetics of the electrode surface.

[0019] The beneficial effects of this utility model are: it facilitates the replacement of electrode tips; the guide port facilitates the insertion of the push sleeve into the mounting groove, and the ball is limited in the corresponding limiting groove, thus playing a good guiding role; it realizes the adjustment of the electrode tip direction, improving the flexibility and convenience of surgery; and the structure is simple and easy to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is the front view of this utility model;

[0022] Figure 3 yes Figure 2 A sectional view of line A-A;

[0023] Figure 4 yes Figure 3 Enlarged view of the structure at point B;

[0024] Figure 5 yes Figure 4 Enlarged view of the structure at point C.

[0025] In the diagram: 1. Insulating shell, 2. Fixing sleeve, 3. Positioning sleeve, 4. Limiting hole, 5. Ball bearing one, 6. Push sleeve, 7. Electrode tip, 8. Limiting groove one, 9. Limiting block, 10. Limiting groove two, 11. Spring one, 12. Outer shell, 13. Inner shell, 14. Cavity, 15. Mounting groove, 16. Guide port, 17. Positioning device, 18. Through hole one, 19. Positioning groove, 20. Shell, 21. Groove, 22. Spring two, 23. Ball bearing two, 24. Circuit board, 25. Operating button, 26. Through hole two, 27. Crown spring, 28. Annular groove, 29. Protrusion, 30. L-shaped groove. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “upper,” “lower,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “below” other elements or features would be fixed “upper” to other elements or features. Thus, the exemplary term “lower” can include both upper and lower orientations. The device may be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 In the embodiments described, an ablation electrode includes an insulating shell 1; a fixing sleeve 2 connected to the end of the insulating shell 1; a positioning sleeve 3, one end of which is inserted into the fixing sleeve 2 and snapped together with the fixing sleeve 2, and the other end of which is located outside the insulating shell 1. The side wall of the positioning sleeve 3 is provided with a plurality of limiting holes 4 evenly distributed along its circumference. The limiting holes 4 are located inside the insulating shell 1 and outside the fixing sleeve 2, and ball beads 5 are provided in the limiting holes 4; a push sleeve 6, which is sleeved on the outer side wall of the positioning sleeve 3 and elastically connected to the positioning sleeve 3 along the length direction of the insulating shell 1. One end of the push sleeve 6 is close to the fixing sleeve 2 and its inner side wall is in contact with the ball beads 5. The other end of the push sleeve 6 is away from the fixing sleeve 2 and located outside the insulating shell 1; an electrode blade 7, one end of which passes through the positioning sleeve 3 and the fixing sleeve 2 in sequence and is located inside the insulating shell 1. The other end of the push sleeve 7 is located outside the positioning sleeve 3. The outer side wall of the push sleeve 7 is provided with a plurality of limiting grooves 8 that are matched with the ball beads 5. The ball beads 5 are limited to the corresponding limiting grooves 8 under the action of the push sleeve 6.

[0031] like Figure 4 As shown, the outer side wall of the positioning sleeve 3, located outside the insulating shell 1, protrudes outward and is fixed with a limiting block 9. The inner side wall of the push sleeve 6, away from the fixed sleeve 2, is provided with a limiting groove 10. The bottom of the limiting groove 10 is close to the fixed sleeve 2, and the opening end of the limiting groove 10 is away from the fixed sleeve 2. A spring 11 is fitted on the outer side wall of the positioning sleeve 3. The spring 11 is located inside the limiting groove 10. One end of the spring 11 is connected to the limiting block 9, and the other end of the spring 11 is connected to the bottom of the limiting groove 10. The push sleeve 6 is elastically connected to the positioning sleeve 3 through the spring 11.

[0032] like Figure 3 and Figure 4As shown, the insulating housing 1 includes an outer shell 12 and an inner shell 13. One end of the outer shell 12 is provided with a cavity 14, and the other end of the outer shell 12 is provided with a mounting groove 15. A limiting hole 4 is located inside the opening end of the mounting groove 15. The end of the push sleeve 6 near the fixed sleeve 2 is located inside the opening end of the mounting groove 15, and its inner sidewall is provided with an inclined guide port 16. The bottom of the mounting groove 15 is provided with a positioning device 17 and a through hole 18 that matches the inner shell 13. The positioning device 17 is located on the side of the through hole 18 and is fixedly connected to the bottom of the mounting groove 15. The fixed sleeve 2 is rotatably connected to... Inside the mounting slot 15, one end of the fixing sleeve 2 matches the inner shell 13 and is provided with several positioning slots 19 that match the positioning device 17. The several positioning slots 19 are evenly distributed around the inner shell 13 in the circumferential direction at the end of the fixing sleeve 2. One end of the inner shell 13 is limited to the cavity 14, and the other end of the inner shell 13 passes through the through hole 18 and is limited to one end of the fixing sleeve 2. One end of the positioning sleeve 3 is inserted into the other end of the fixing sleeve 2 and is snapped together with the fixing sleeve 2. One end of the electrode tip 7 passes through the positioning sleeve 3 and the fixing sleeve 2 in sequence and is located inside the inner shell 13.

[0033] like Figure 4 and Figure 5 As shown, the positioning device 17 includes a housing 20, which is fixedly connected to the bottom of the mounting groove 15. The end of the housing 20 is provided with a groove 21, in which a second spring 22 and a second ball 23 that matches the positioning groove 19 are provided. One end of the second spring 22 is connected to the bottom of the groove 21, and the other end of the second spring 22 is in contact with the second ball 23. The second ball 23 is located in the opening end of the groove 21, and the second ball 23 is located in the positioning groove 19 under the action of the second spring 22.

[0034] like Figure 3 As shown, a circuit board 24 is provided inside the outer casing 12. The circuit board 24 is located on the inner side and is detachably connected to the outer casing 12 and the inner casing 13 respectively. An operation button 25 is provided on the circuit board 24. A through hole 26 matching the operation button 25 is provided on the outer casing 12. The bottom of the operation button 25 is located inside the outer casing 12 and is electrically connected to the circuit board 24. The top of the operation button 25 passes through the through hole 26 and is located outside the outer casing 12. The electrode tip 7 is electrically connected to the circuit board 24.

[0035] like Figure 4 As shown, a crown spring 27 is fitted onto the electrode tip 7, and the crown spring 27 is confined within the inner shell 13. An annular groove 28 is provided on the outer wall of the fixing sleeve 2, and a protrusion 29 matching the annular groove 28 is fixed on the side wall of the mounting groove 15. The fixing sleeve 2 is rotatably connected to the mounting groove 15 through the matching of the annular groove 28 and the protrusion 29. An L-shaped groove 30 matching the end of the outer shell 12 is provided on the outer wall of the push sleeve 6 near the fixing sleeve 2.

[0036] In the first embodiment, under the elastic action of spring 11, the end of the push sleeve 6 closest to the fixed sleeve 2 is located inside the insulating housing 1, and its inner sidewall simultaneously acts on the balls 5 in several limiting holes 4, causing the balls 5 to be engaged in the limiting grooves 8, thereby fixing the electrode head 7. When the electrode head 7 needs to be replaced, the operator overcomes the elastic action of spring 11 and pulls the push sleeve 6 outward, causing the push sleeve 6 to separate from the balls 5. The balls 5 lose the limiting effect of the push sleeve 6, and the electrode head 7 can be pulled outward, thus achieving the disassembly of the electrode head 7. When installing a new electrode tip 7, the operator pulls the push sleeve 6 outward to separate the push sleeve 6 from the ball bearing 5, and then inserts the electrode tip 7. Under the reset action of the spring 11, the push sleeve 6 is inserted into the insulating housing 1, so that the push sleeve 6 acts on the ball bearing 5 in several limiting holes 4 at the same time, so that the ball bearing 5 is locked into the corresponding limiting groove 8, and the electrode tip 7 is fixed. Therefore, this solution can quickly replace the electrode tip 7 by simply inserting and removing the push sleeve 6. The operation is simple and achieves the purpose of facilitating the replacement of the electrode tip 7.

[0037] In the second embodiment, when it is necessary to change the direction of the electrode tip 7, the operator only needs to rotate the push sleeve 6 to make the positioning sleeve 3, the fixing sleeve 2, and the electrode tip 7 rotate as a whole. Under the elastic action of the spring 22, the ball bearing 23 is sequentially inserted into the corresponding positioning groove 19 until the electrode tip 7 rotates to the appropriate position. The ball bearing 23 is embedded in the corresponding positioning groove 19 to cooperate and position the fixing sleeve 2, thereby preventing the electrode tip 7 from deflecting during operation and fixing the electrode tip 7. Thus, the direction of the electrode tip 7 can be adjusted, improving the flexibility and convenience of the operation.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ablation electrode, characterized in that, The utility model relates to an electrode fixing device, including: An insulating shell (1); A fixing sleeve (2) connected to the end of the insulating shell (1); A positioning sleeve (3) inserted into the fixing sleeve (2) and buckled with the fixing sleeve (2) at one end and located outside the insulating shell (1) at the other end, a plurality of limiting holes (4) uniformly distributed along the circumference of the side wall of the positioning sleeve (3) are arranged on the side wall of the positioning sleeve (3), the limiting holes (4) are located inside the insulating shell (1) and outside the fixing sleeve (2), and a ball (5) is arranged in the limiting holes (4); A pushing sleeve (6) elastically connected with the positioning sleeve (3) along the length direction of the insulating shell (1) and arranged on the outer side wall of the positioning sleeve (3), one end of the pushing sleeve (6) is close to the fixing sleeve (2) and the inner side wall of the pushing sleeve (6) is in contact with the ball (5), and the other end of the pushing sleeve (6) is away from the fixing sleeve (2) and located outside the insulating shell (1); An electrode cutter head (7) sequentially penetrating the positioning sleeve (3) and the fixing sleeve (2) and located inside the insulating shell (1) at one end and located outside the positioning sleeve (3) at the other end, a plurality of limiting grooves (8) matched with the ball (5) are arranged on the outer side wall of the electrode cutter head (7), and the ball (5) is limited in the corresponding limiting groove (8) under the action of the pushing sleeve (6).

2. An ablation electrode according to claim 1, characterized in that The outer side wall of one end of the positioning sleeve (3) located outside the insulating shell (1) protrudes outward and is fixed with a limiting block (9), the inner side wall of the other end of the pushing sleeve (6) away from the fixing sleeve (2) is provided with a limiting groove (10), the bottom of the limiting groove (10) is close to the fixing sleeve (2), the opening end of the limiting groove (10) is away from the fixing sleeve (2), a spring (11) is arranged on the outer side wall of the positioning sleeve (3), the spring (11) is located in the limiting groove (10), one end of the spring (11) is connected with the limiting block (9), the other end of the spring (11) is connected with the bottom of the limiting groove (10), and the pushing sleeve (6) is elastically connected with the positioning sleeve (3) through the spring (11).

3. An ablation electrode according to claim 1, wherein, The insulating shell (1) comprises an outer shell (12) and an inner shell (13), one end of the outer shell (12) is provided with a cavity (14), the other end of the outer shell (12) is provided with a mounting groove (15), the limiting hole (4) is located in the opening end of the mounting groove (15), one end of the push sleeve (6) close to the fixed sleeve (2) is located in the opening end of the mounting groove (15), and the inner side wall thereof is provided with an inclined guide hole (16); the bottom of the mounting groove (15) is provided with a positioning device (17) and a through hole I (18) matched with the inner shell (13), the positioning device (17) is located on the side of the through hole I (18) and is fixedly connected with the bottom of the mounting groove (15), the fixed sleeve (2) is rotationally connected in the mounting groove (15), one end of the fixed sleeve (2) is matched with the inner shell (13) and is provided with a plurality of positioning grooves (19) matched with the positioning device (17), the plurality of positioning grooves (19) are evenly distributed on the end of the fixed sleeve (2) along the circumference with the inner shell (13) as the center, one end of the inner shell (13) is limited in the cavity (14), the other end of the inner shell (13) is limited in one end of the fixed sleeve (2) after penetrating through the through hole I (18), one end of the positioning sleeve (3) is inserted into the other end of the fixed sleeve (2) and is buckled with the fixed sleeve (2), one end of the electrode tool bit (7) is sequentially penetrated through the positioning sleeve (3) and the fixed sleeve (2) and is located in the inner shell (13).

4. An ablation electrode according to claim 3, wherein, The positioning device (17) comprises a shell (20), the shell (20) is fixedly connected with the bottom of the mounting groove (15), the end of the shell (20) is provided with a groove (21), the groove (21) is provided with a spring II (22) and a ball II (23) matched with the positioning groove (19), one end of the spring II (22) is connected with the bottom of the groove (21), the other end of the spring II (22) is in contact with the ball II (23), the ball II (23) is located in the opening end of the groove (21), and the ball II (23) is limited in the positioning groove (19) under the action of the spring II (22).

5. An ablation electrode according to claim 3 or 4, characterised in that The outer shell (12) is provided with a circuit board (24), the circuit board (24) is located on the side of the inner side and is detachably connected with the outer shell (12) and the inner shell (13) respectively, the circuit board (24) is provided with an operation button (25), the outer shell (12) is provided with a through hole II (26) matched with the operation button (25), the bottom of the operation button (25) is located in the outer shell (12) and is electrically connected with the circuit board (24), the top of the operation button (25) is penetrated through the through hole II (26) and is located outside the outer shell (12), and the electrode tool bit (7) is electrically connected with the circuit board (24).

6. An ablation electrode according to claim 3 or 4, characterised in that The electrode tool bit (7) is provided with a crown spring (27), and the crown spring (27) is limited in the inner shell (13).

7. An ablation electrode according to claim 3 or 4, characterised in that The outer side wall of the fixing sleeve (2) is provided with an annular groove (28), the side wall of the mounting groove (15) is fixed with a protrusion (29) matched with the annular groove (28), and the fixing sleeve (2) is rotationally connected in the mounting groove (15) through the matching of the annular groove (28) and the protrusion (29).

8. An ablation electrode according to claim 3 or 4, characterised in that, The outer side wall of one end of the pushing sleeve (6) close to the fixing sleeve (2) is provided with an L-shaped groove (30) matched with the end of the shell (12).

Images