Secondary limiting plug for ablation electrode

Abstract

The utility model relates to the technical field of ablation electrodes, in particular to a time-limiting plug for an ablation electrode, which comprises a plug shell, two fixed electrode columns are fixedly embedded in the plug shell, the plug shell is provided with mounting grooves on the same side with the fixed electrode columns, tension springs are fixedly mounted in the mounting grooves, and the tension springs are fixedly connected with the plug shell. A movable electrode column with one end extending to the outer side of the plug shell is fixedly mounted on the tension spring, a placement groove is formed in the side wall of the mounting groove, a clamping groove is formed in the side wall of the movable electrode column, a clamping block with one end extending to the top of the clamping groove is rotationally connected to the bottom of the placement groove, and the placement groove limits the clamping block to rotate to be horizontal or vertical at most. The length of the clamping groove is larger than the length needed by the clamping block during rotation. When the tensile force of the tension spring is greater than the friction force between the movable electrode column and the socket, the movable electrode column is pulled out of the socket and moves into the mounting groove, so that the movable electrode column cannot be inserted into the socket again, and the ablation electrode cannot be used again.

Description

Technical Field

[0001] The utility model relates to the technical field of ablation electrodes, in particular to a time-limited plug for ablation electrodes. Background Art

[0002] Ablation electrodes are usually disposable. They are Class II medical devices and are used in conjunction with high-frequency surgical equipment. They are disposable consumables for cutting or coagulation during surgical operations. The main body of the ablation electrode consists of a Luer connector, a water inlet pipe, a water outlet pipe, a radio frequency cable connection line, a handle, an insulating sleeve and an electrode needle. They are sterilized with ethylene oxide and provided in a sterile state for clinical use in non-endoscopic surgical operations for ablation and coagulation treatment of malignant solid tumor tissues. Although there are reusable ablation electrodes on the market, because high temperature and high pressure sterilization may cause the insulation layer to fall off, the current mainstream is still disposable ablation electrodes. This design is mainly to ensure the safety and effectiveness of the operation and avoid cross-infection and disease transmission.

[0003] The difference between an ablation electrode and an ordinary plug is that its three electrode columns are located in the same row and have different spacings. For example, Chinese patent CN2020220532454 proposes a limited-time plug for an ablation electrode. Although the plug can also self-destruct after one use, making it unusable again, its sliding electrode pin and the electrode seat are only electrically connected through contact. During surgery, if the outer shell is accidentally pulled by the wire, the sliding electrode pin will be directly separated from the electrode seat, thereby cutting off the power to the ablation electrode. In other words, the power on and off of the ablation electrode is unstable during use, and it is necessary to be cautious during surgery, which puts too much operating burden on the doctor. Utility Model Content

[0004] In order to address the deficiencies of the prior art, the utility model provides a time-limited plug for an ablation electrode, comprising a plug shell, wherein two fixed electrode columns are embedded in the plug shell, and a mounting groove is provided on the plug shell on the same side as the fixed electrode column, a tension spring is fixedly installed in the mounting groove, and a movable electrode column with one end extending to the outside of the plug shell is fixedly installed on the tension spring, a placement groove is provided on the side wall of the mounting groove, and a clamping groove is provided on the side wall of the movable electrode column, a clamping block with one end extending to the top of the clamping groove is rotatably connected to the bottom of the placement groove, and the placement groove limits the clamping block to rotate to horizontal or vertical at most, and the length of the clamping groove is greater than the length required for the clamping block to rotate.

[0005] Preferably, the contraction distance of the tension spring is greater than the length of the movable electrode column located outside the plug shell.

[0006] Preferably, it further comprises a conductive wire, wherein the conductive wire is divided into three strands which are respectively and electrically connected to the movable electrode column and the two fixed electrode columns.

[0007] Preferably, the movable electrode column is rotatably connected to one end of the tension spring with a rotating rod and a torsion spring fixedly installed with one end against the rotating rod, a fixed block is fixedly installed at the bottom of the mounting groove, a shallow groove and a deep groove are provided on the fixed block, a limit block is fixedly installed on the fixed block and is located on the side of the deep groove away from the shallow groove, an extension groove connected to the deep groove is provided on the bottom wall of the mounting groove, and the thrust direction applied by the torsion spring to the rotating rod is in the direction close to the side of the limit block.

[0008] The utility model has the following beneficial effects:

[0009] The conductive wire is directly and electrically connected to the movable electrode column and the two fixed electrode columns, that is, there is no need to worry about the problem of power outage caused by pulling the wire during plugging in, so that the doctor can operate with confidence. In the process of plugging in, the card block holds the movable electrode column, so that the movable electrode column will not be squeezed into the plug shell. Even if the plug can be normally energized with the socket, when the plug is pulled out after use, the movable electrode column is clamped by the socket and relatively displaced with the plug shell. The bottom wall of the card slot pushes the card block to rotate, so that the card block is disengaged from the card slot and rotated into the placement slot, thereby releasing the limit of the movable electrode column by the card block. As the displacement increases, the deformation tension of the tension spring increases. When the tension of the tension spring is greater than the friction between the movable electrode column and the socket, the movable electrode column is pulled out of the socket and moved into the installation slot, so that the movable electrode column cannot be inserted into the socket again, thereby making the ablation electrode cannot be used again. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure provided by the utility model.

[0011] Figure 2 It is a schematic diagram of the structure after the tension spring is hidden provided by the utility model.

[0012] Attached Figure 1-2 The structures represented by the labels are listed below:

[0013] 1. Plug shell; 2. Fixed electrode column; 3. Movable electrode column; 4. Conductive wire; 5. Mounting slot; 6. Tension spring; 7. Placement slot; 8. Card slot; 9. Card block; 10. Fixed block; 11. Shallow slot; 12. Rotating rod; 13. Torsion spring; 14. Deep slot; 15. Limit block; 16. Extension slot. DETAILED DESCRIPTION

[0014] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0015] It should be noted that when a part or component is considered to be "connected", "located", or "assembled" on another part or component, it may be directly disposed on the other part or component or there may be a central part or component at the same time. The terms "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only.

[0016] In a specific embodiment, Figure 1-2 As shown, a time-limited plug for an ablation electrode comprises a plug shell 1, two fixed electrode columns 2 are embedded in the plug shell 1, a mounting groove 5 is provided on the plug shell 1 on the same side as the fixed electrode column 2, a tension spring 6 is fixedly installed in the mounting groove 5, a movable electrode column 3 with one end extending to the outside of the plug shell 1 is fixedly installed on the tension spring 6, a placement groove 7 is provided on the side wall of the mounting groove 5, a clamping groove 8 is provided on the side wall of the movable electrode column 3, a clamping block 9 with one end extending to the top of the clamping groove 8 is rotatably connected to the bottom of the placement groove 7, the placement groove 7 limits the clamping block 9 to rotate to horizontal or vertical at most, and the length of the clamping groove 8 is greater than the length required for the clamping block 9 to rotate.

[0017] When the clamping block 9 is horizontal, the bottom wall of the placement groove 7 limits the rotation of the clamping block 9 toward the side close to the tension spring 6, and the top wall of the clamping groove 8 contacts the side wall of the clamping block 9, so that the movable electrode column 3 cannot move toward the side close to the tension spring 6. At this time, the outer end of the movable electrode column 3 and the two fixed electrode columns 2 are located on the same horizontal line, and the tension spring 6 is in an extended state, that is, the tension spring 6 pulls the movable electrode column 3 to resist the clamping block 9, so that the clamping block 9 is fixed, and the movable electrode column 3 is prevented from moving due to shaking, etc., and the clamping block 9 is rotated into the placement groove 7.

[0018] In this embodiment, the contraction distance of the tension spring 6 is greater than the length of the movable electrode column 3 outside the plug shell 1, so that the movable electrode column 3 can be completely retracted into the plug shell 1 when the tension spring 6 pulls the movable electrode column 3 to move.

[0019] It also includes a conductive wire 4 , wherein the conductive wire 4 is divided into three strands which are respectively and fixedly electrically connected to the movable electrode column 3 and the two fixed electrode columns 2 .

[0020] According to actual needs, the above-mentioned limited-time plug for ablation electrode can be further optimized and / or improved:

[0021] In the present embodiment, the movable electrode column 3 is rotatably connected to one end of the tension spring 6 with a rotating rod 12 and a torsion spring 13 fixedly installed with one end against the rotating rod 12. A fixing block 10 is fixedly installed at the bottom of the mounting groove 5. A shallow groove 11 and a deep groove 14 are provided on the fixing block 10. A limiting block 15 located on the side of the deep groove 14 away from the shallow groove 11 is fixedly installed on the fixing block 10. An extension groove 16 connected to the deep groove 14 is provided on the bottom wall of the mounting groove 5. The thrust direction applied by the torsion spring 13 to the rotating rod 12 is the direction close to the side of the limiting block 15. When the rotating rod 12 rotates to the top of the deep groove 14, the length directions of the deep groove 14, the extension groove 16 and the rotating rod 12 are all located on the same straight line and parallel to the length direction of the mounting groove 5. In the initial state, the end of the rotating rod 12 away from the movable electrode column 3 is located in the shallow groove 11. When the plug shell 1 and the movable electrode column 3 are relatively displaced, the rotating rod 12 is separated from the shallow groove 11 and rotated to contact the limit block 15 by the thrust of the torsion spring 13, so that the rotating rod 12 is aligned with the deep groove 14. After the movable electrode column 3 is separated from the socket, the tension spring 6 pulls the movable electrode column 3 to move into the installation groove 5, so that the rotating rod 12 is inserted into the deep groove 14 and the extension groove 16. That is, when in use, the rotating rod 12 assists the clamping block 9 to fix the movable electrode column 3, prevents the movable electrode column 3 from moving into the installation groove 5 when inserted into the socket, and prevents the clamping block 9 from being cut off when inserted. When the movable electrode column 3 is pulled out of the socket after the ablation electrode is used, the rotating rod 12 moves into the deep groove 14 and the extension groove 16, and the clamping block 9 rotates into the placement groove 7, removing the restriction that the movable electrode column 3 cannot move into the installation groove 5.

[0022] In summary: the conductive wire 4 is directly and electrically connected to the movable electrode column 3 and the two fixed electrode columns 2, that is, there is no need to worry about the problem of power outage caused by pulling the wire during the plugging process, so that the doctor can operate with confidence. In the plugging process, the clamping block 9 holds the movable electrode column 3, so that the movable electrode column 3 will not be squeezed into the plug shell 1. Even if the plug can be normally energized with the socket, when the plug is pulled out after use, the movable electrode column 3 is clamped by the socket and relatively displaced with the plug shell 1. The bottom wall of the clamping slot 8 pushes the clamping block 9 to rotate, so that the clamping block 9 disengages from the clamping slot 8 and rotates into the placement slot 7, and the clamping block 9 releases the limit of the movable electrode column 3. As the displacement increases, the deformation tension of the tension spring 6 increases. When the tension of the tension spring 6 is greater than the friction between the movable electrode column 3 and the socket, the movable electrode column 3 is pulled out of the socket and moved into the mounting slot 5, so that the movable electrode column 3 cannot be inserted into the socket again, thereby making the ablation electrode cannot be used again.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A time-limited plug for an ablation electrode, characterized in that: The invention comprises a plug shell (1), wherein two fixed electrode columns (2) are embedded in the plug shell (1), and the plug shell (1) is provided with a mounting groove (5) on the same side as the fixed electrode columns (2), a tension spring (6) is fixedly installed in the mounting groove (5), and a movable electrode column (3) having one end extending to the outside of the plug shell (1) is fixedly installed on the tension spring (6), a placement groove (7) is provided on the side wall of the mounting groove (5), and a clamping groove (8) is provided on the side wall of the movable electrode column (3), and the bottom of the placement groove (7) is rotatably connected to a clamping block (9) having one end extending to the top of the clamping groove (8), and the placement groove (7) limits the clamping block (9) to rotate to the horizontal or vertical position at most, and the length of the clamping groove (8) is greater than the length required for the clamping block (9) to rotate.

2. The time-limited plug for ablation electrode according to claim 1, characterized in that: The contraction distance of the tension spring (6) is greater than the length of the movable electrode column (3) located outside the plug housing (1).

3. The time-limited plug for ablation electrode according to claim 1, characterized in that: It also comprises a conductive wire (4), wherein the conductive wire (4) is divided into three strands which are respectively and fixedly electrically connected to the movable electrode column (3) and the two fixed electrode columns (2).

4. The time-limited plug for ablation electrode according to claim 1, characterized in that: The movable electrode column (3) is rotatably connected to one end of the tension spring (6) with a rotating rod (12) and a torsion spring (13) fixedly installed with one end abutting against the rotating rod (12); a fixing block (10) is fixedly installed at the bottom of the installation groove (5); a shallow groove (11) and a deep groove (14) are provided on the fixing block (10); a limiting block (15) is fixedly installed on the fixing block (10) and is located on a side of the deep groove (14) away from the shallow groove (11); an extension groove (16) connected to the deep groove (14) is provided on the bottom wall of the installation groove (5); and the thrust direction applied by the torsion spring (13) to the rotating rod (12) is in the direction close to the side of the limiting block (15).

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