A bipolar electro-treatment device

Abstract

The utility model discloses a kind of bipolar electric processing devices, including electrically conductive towrope and electrode, electrode includes first electrode and second electrode, first electrode includes electrical connector, pole seat and elastic member, one end of electrical connector is fixed and is arranged in pole seat, elastic member is provided with passage along the axial direction, electrically conductive towrope extends in the axial direction in passage, elastic member is provided with electrical connection part, electrical connection part and electrically conductive towrope form electrically conductive contact, the electrode of this bipolar electric processing device is simple, improves electrically conductive stability, improves work efficiency, reduces production cost.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bipolar electrical processing device. Background Technology

[0002] With the development of integrated bipolar energy platform technology in the field of endoscopic surgical instruments, the technical requirements for precise modulation of high-frequency current and efficient closure of bipolar circuits necessitate that the bipolar handpiece, as the core of energy transmission, possess higher structural stability and electrical connection reliability.

[0003] However, existing bipolar handle designs have significant drawbacks: Chinese patent CN115349943A discloses a high-frequency cutting knife for a multifunctional endoscope, in which an electrode seat is threaded to the end of the first electrode, and a first conductive tube is welded to the end of the electrode seat. The electrode seat is fixedly connected to the inner wall of the handle, and the electrode seat is rotatably fitted into a sliding groove. By designing a sliding and rotatable electrode assembly, combined with a conductive coating and inert electrode wire, the problems of entanglement and flexibility of the bipolar cutting knife are solved. However, this electrical connection structure adopts a fixed connection method, which not only leads to complicated assembly processes and high precision requirements for component fitting, but also significantly increases production costs.

[0004] Chinese Patent Publication No. CN208725866U discloses a control device for electrosurgical instruments, including an active electrode wire, a passive electrode wire, electrodes, a rotating handle connected to a motor, a sliding handle, and a sheath. The active electrode wire is slidably connected to a sliding connector and one end is fixedly connected to the sliding handle. The passive electrode wire is housed in the sheath and one end is electrically connected to a negative electrode base. The active electrode wire makes slidable electrical contact with a conductive insert. When the sliding handle slides or the rotating handle rotates, only the active electrode wire rotates or slides, while the passive electrode wire remains stationary, effectively preventing the active and passive electrode wires from tangling during use. However, this electrical connection structure maintains the conductive path through sliding contact between the push-pull rod assembly and the electrical interface. This dynamic connection mechanism is prone to problems such as unstable contact resistance and fluctuating current transmission.

[0005] In clinical surgery, the above-mentioned defects can lead to uneven energy output, resulting in reduced polyp removal efficiency and poor wound hemostasis. This forces surgeons to extend the operation time to compensate for the instrument's inadequacy, while also increasing the risk of intraoperative tissue damage and postoperative complications, seriously affecting surgical safety and treatment outcomes. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the purpose of this application is to provide a bipolar electrical processing device that can avoid the problems of complex welding process and unstable conductivity caused by its split structure.

[0007] To achieve the above objectives, the following technical solution is adopted:

[0008] Conductive traction rope and electrodes;

[0009] The electrode includes a first electrode and a second electrode;

[0010] The first electrode includes an electrical connector, a base, and an elastic element;

[0011] One end of the electrical connector is fixedly inserted into the electrode base. The elastic element has a channel along the axial direction. The conductive traction rope extends axially within the channel. The elastic element has an electrical connection portion that forms a conductive contact with the conductive traction rope. The elastic element includes a distal end and a proximal end.

[0012] The pole base includes a first end and a second end, the distal end of the elastic element is electrically connected to the first end, and / or the proximal end of the elastic element is electrically connected to the second end.

[0013] Furthermore, the elastic element includes a crown spring, the distal end of which is electrically connected to a first end of the pole seat, and / or the proximal end of which is electrically connected to a second end.

[0014] Furthermore, the crown spring also includes a middle section, the inner diameter of which is smaller than the inner diameter of the distal end and the inner diameter of the proximal end, and the inner peripheral wall of the middle section is electrically connected to the conductive traction rope through an interference fit.

[0015] Furthermore, the elastic element also includes a spring, which is disposed within the crown spring channel and is axially compressed. The crown spring maintains conductive contact with the first end or the second end of the pole seat through the elastic force of the spring.

[0016] Furthermore, the first end of the pole base is provided with a first bend, and the second end of the pole base is provided with a second bend; the first bend abuts against the distal end of the elastic member, and the first bend restricts the elastic member from moving axially to the distal end; the second bend abuts against the proximal end of the elastic member, and the second bend restricts the elastic member from moving axially to the proximal end.

[0017] Furthermore, the distal end of the electrical connector is provided with a slot, and the middle part of the electrode base is provided with a groove, the groove being interference-fitted with the slot.

[0018] Furthermore, the second electrode includes a conductor and a conductive wire, the conductor being sleeved on the electrical connector;

[0019] The proximal end of the conductive wire is electrically connected to the conductor.

[0020] Preferably, the conductor is a conductor tube and a conductor sheet, and the conductive wire is a molybdenum wire;

[0021] Furthermore, the bipolar electrical treatment device also includes a sheath, which comprises an inner sheath and an outer sheath, with the inner sheath fixed inside the outer sheath.

[0022] The conductive wire is connected to a conductive component at its distal end, and the conductive component is fixed to the surface of the outer sheath.

[0023] The conductive wire is fixed between the outer sheath and the inner sheath.

[0024] The conductive component, the conductive wire, and the conductor form a complete passive circuit electrode.

[0025] Preferably, the conductive component is a loop electrode;

[0026] Furthermore, it also includes a handle, a base, and a push-pull rod;

[0027] The handle is connected to the base;

[0028] The push-pull rod is movably installed inside the handle and is electrically connected to the conductive traction rope.

[0029] When the push-pull rod is pushed to move to the distal end, the first end of the pole seat is electrically connected to the distal end of the elastic element;

[0030] When the push-pull rod is pulled to move towards the proximal end, the second end of the pole seat is electrically connected to the proximal end of the elastic element.

[0031] Furthermore, it also includes remote components;

[0032] The conductive traction rope comprises multiple strands of steel wire rope, with the distal end of the steel wire rope fixedly connected to the distal end component and the proximal end of the steel wire rope fixedly connected to the push-pull rod.

[0033] Furthermore, the conductive traction rope also includes a torque wire, and the multiple strands of the steel wire rope and the torque wire are twisted together by at least one of the following methods: welding connection using connecting pipes, crimping connection, or direct butt welding connection or brazing connection;

[0034] The distal end of the conductive traction rope is the steel wire rope, and the proximal end of the conductive traction rope is the torque wire.

[0035] Compared with the prior art, the beneficial effects of this application are as follows:

[0036] 1. The bipolar electrical processing device provided in this application includes an electrical connector, a base, and an elastic element as the first electrode. The elastic element has a channel along the axial direction and includes a crown spring. The distal end of the crown spring is electrically connected to the first end of the base, and / or the proximal end and the second end of the crown spring are electrically connected. This design replaces the traditional welding and pressing process with a non-fixed elastic contact between the crown spring and the base, reducing the fixed connection process of the first electrode, reducing assembly complexity, and improving work efficiency.

[0037] 2. The bipolar electrical processing device provided in this application includes an electrical connector, a base, and an elastic element as the first electrode. The elastic element has a channel along the axial direction and includes a crown spring. The crown spring also includes an intermediate section. The inner diameter of the intermediate section is smaller than the inner diameter of the distal end and the inner diameter of the proximal end. The inner peripheral wall of the intermediate section is interference-fitted with the conductive traction rope to achieve electrical connection. This can solve the current problems of unstable electrical connection, improve conductivity stability, and improve surgical results.

[0038] 3. The bipolar electrical processing device provided in this application includes an electrical connector, a base, and an elastic element as the first electrode. The elastic element has a channel along the axial direction and includes a crown spring and a spring. The spring is disposed within the crown spring channel and is axially compressed. The crown spring maintains conductive contact with the first or second end of the base through the spring's elastic force. The axial compression force of the spring further ensures continuous conductive contact between the elastic element and the base, thereby improving the conductivity stability of the bipolar electrical processing device.

[0039] 4. The bipolar electrical treatment device provided in this application includes a torque wire in the conductive traction rope. Multiple strands of steel wire rope are twisted together with the torque wire. The distal end of the conductive traction rope is a steel wire rope, and the proximal end of the conductive traction rope is a torque wire, thereby reducing production costs. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a bipolar electrical processing device in one embodiment of this application;

[0041] Figure 2 for Figure 1 A cross-sectional view of a bipolar electrical processing device;

[0042] Figure 3 for Figure 2 Enlarged view of point A in the bipolar electrical processing device;

[0043] Figure 4 This is an enlarged view of part A of the bipolar electrical processing device according to another embodiment of this application;

[0044] Figure 5 A partially exploded view of the bipolar electrical processing device;

[0045] Explanation of reference numerals in the attached figures:

[0046] 1000. Bipolar electrical processing device;

[0047] 100. Handle part; 110. Rotating handle; 120. Sliding finger ring; 130. Push-pull rod; 140. Fixing sleeve;

[0048] 200. Base portion; 210. Base; 220. First electrode; 230. Second electrode; 221. Elastic element; 2211. Crown spring; 22111. Electrical connection part; 2212. Spring; 222. Electrode seat; 2221. Groove; 2222. First bend; 2223. Second bend; 223. Electrical connector; 2231. Slot; 224. Connector injection molded part; 231. Conductor tube; 232. Conductor sheet; 233. Molybdenum wire;

[0049] 300. Sheath section; 310. Heat shrink tubing; 320. Outer sheath; 330. Inner sheath; 331. T-shaped snap-fit ​​part; 340. Conductive traction rope; 350. Circuit electrode;

[0050] 400. Remote component; 410. Sleeve; 420. Connecting pipe. Detailed Implementation

[0051] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] It should be noted that, in this application, the terms "proximal" and "distal" are used with the operator as the reference point. The end closer to the operator is called the proximal end or proximal portion, and the end farther from the operator is called the distal end or distal portion. The side facing the operator is called the proximal side or proximal side, and the side away from the operator is called the distal side or distal side. The distal direction and proximal direction represent two directions.

[0053] First embodiment:

[0054] like Figures 1 to 5 A bipolar electrical processing device 1000 includes: a distal component 400, a sheath portion 300, a base portion 200, and a handle portion 100. The distal component 400 is disposed at the distal end of the sheath portion 300 and is rotatable relative to the sheath portion 300; the proximal end of the sheath portion 300 is mounted at the distal end of the base portion 200 and is connected to the base portion 200; the handle portion 100 is mounted at the proximal end of the base portion 200 and is rotatable relative to the base portion 200.

[0055] Handle part 100:

[0056] The handle portion 100 includes a rotating handle 110, a sliding ring 120, a push-pull rod 130, and a fixed sleeve 140. The rotating handle 110 is rotatably mounted on the proximal end of the base portion 200, and the sliding ring 120 is slidably mounted on the rotating handle 110. The proximal end of the push-pull rod 130 is bent to form a 180° reverse bend, which engages with the sliding ring 120, thus forming a linkage mechanism between the push-pull rod 130 and the sliding ring 120. The fixed sleeve 140 is coaxially sleeved on the outer surface of the proximal end of the push-pull rod 130, and the contact surface between the fixed sleeve 140 and the push-pull rod 130 is welded. When the operator drives the sliding ring 120 to move along its axial direction, the push-pull rod 130 undergoes synchronous and unidirectional displacement under the constraint of the fixed sleeve 140.

[0057] Base part 200:

[0058] The base portion 200 includes a base 210, a first electrode 220, and a second electrode 230. The first electrode 220 further includes an elastic element 221, an electrode base 222, an electrical connector 223, and a connector injection molded part 224; the second electrode further includes a conductor tube 231, a conductor sheet 232, and a molybdenum wire 233. The elastic element 221 can be a crown spring 2211. The crown spring 2211 has a channel along the axial direction, and the push-pull rod 130 extends axially within the channel. The crown spring 2211 has an electrical connection part 22111 in the middle, and the electrical connection part 22111 forms a conductive contact with the push-pull rod 130. Further, the crown spring 2211 also includes an intermediate section. The inner diameter of the intermediate section is smaller than the inner diameter of the distal end and the inner diameter of the proximal end. Further, the inner diameter of the intermediate section is 0.8-1.0 mm, the inner diameter of the distal end and the inner diameter of the proximal end are 1.7-1.9 mm, the diameter of the push-pull rod 130 is 1.1-1.2 mm, and the inner peripheral wall of the intermediate section is interference-fitted with the push-pull rod 130 to achieve electrical connection, improve conductivity stability, and improve surgical results.

[0059] The base 222 is provided with a first bending portion 2222 and a second bending portion 2223. In one first scheme where the base 222 is electrically connected to the crown spring 2211: when the push-pull rod 130 is pushed to the distal end, the first bending portion 2222 abuts against the distal end of the crown spring 2211, restricting the axial movement of the crown spring 2211 to the distal end; when the push-pull rod 130 is pulled to the proximal end, the second bending portion 2223 abuts against the proximal end of the crown spring 2211, restricting the axial movement of the crown spring 2211 to the proximal end; this non-direct fixing method eliminates the need for welding between the base 222 and the crown spring 2211, simplifying assembly, improving work efficiency, and reducing production costs. The second scheme for electrically connecting the pole base 222 and the crown spring 2211: When the push-pull rod 130 is pushed to move axially, the distal end of the crown spring 2211 is electrically connected to the first bent portion 2222 of the pole base 222, while the proximal end of the crown spring 2211 is electrically connected to the second bent portion 2223 of the pole base 222. The proximal and distal ends of the crown spring 2211 simultaneously form a conductive path with the pole base 222. Through the elastic surface contact design at both ends, even if there is radial offset during the axial movement of the push-pull rod 130, conductive fluctuations caused by local contact failure can be avoided, thereby improving conductive stability. In addition, the crown spring 2211 and the pole seat 222 are connected by a non-fixed connection method. A radial movement gap is formed between the outer peripheral surface of the crown spring 2211 and the inner wall of the pole seat 222, and the inner peripheral surface of the crown spring 2211 and the outer peripheral wall of the push-pull rod 130 maintain a clearance fit. When the push-pull rod 130 is radially offset or slightly deformed, the crown spring 2211 can float freely radially in the internal space of the pole seat 222, thereby ensuring that the axes of the crown spring 2211, the push-pull rod 130 and the pole seat 222 are always in a coincident state, thereby significantly reducing the risk of sudden changes in frictional resistance and movement jamming caused by misalignment of components during the push-pull operation.

[0060] like Figure 5The electrical connector 223 is integrated with the connector injection molded part 224 through injection molding process. The pole seat 222 has a groove 2221 in the middle section of the axial direction. The electrical connector 223 has a radially protruding slot 2231 at the far end. By inserting the slot 2231 into the groove 2221 in an interference fit manner, the mechanical connection and electrical conduction between the electrical connector 223 and the pole seat 222 are realized. The conductive end face of the electrical connector 223 forms a direct conductive contact with the corresponding contact surface of the electrode base 222. The distal or proximal end face of the crown spring 2211 abuts against the proximal or distal end face of the electrode base 222 through the axial drive of the push-pull rod 130. The inner circumferential surface of the crown spring 2211 and the outer circumferential surface of the push-pull rod 130 are interference-fitted to achieve electrical connection. The distal end of the push-pull rod 130 is fixedly connected to the distal component 400 and maintains electrical conductivity, thereby forming the first electrode circuit. Its conductive path is as follows: electrical connector 223, electrode base 222, crown spring 2211, push-pull rod 130, distal component 400, forming a closed conductive path.

[0061] The conductor tube 231 of the electrical connector 223 is covered by the insulating material of the connector injection molded part 224. The conductor piece 232 is coaxially sleeved on the conductor tube 231 near the end of the electrode 222 with an interference fit, and forms a fixed electrical connection with the conductor tube 231. The proximal end of the molybdenum wire 233 is electrically connected to the conductor piece 232, and the distal end of the molybdenum wire 233 is fixedly connected to the loop electrode 350, thereby realizing electrical conduction. The second electrode circuit formed by the loop electrode 350, the molybdenum wire 233, the conductor piece 232, and the conductor tube 231 has a conductive path of: loop electrode 350, molybdenum wire 233, conductor piece 232, and conductor tube 231, forming a closed conductive path.

[0062] Sheath section 300:

[0063] The sheath portion 300 includes a heat shrink tubing 310, an outer sheath 320, an inner sheath 330, a conductive traction rope 340, and a return electrode 350. The heat-shrink tubing 310 uses a heat-shrink process to cover and fix the connection between the proximal end of the outer sheath 320 and the distal end of the base 210. The proximal end of the inner sheath 330 is provided with a radially extended T-shaped snap-fit ​​part 331. The T-shaped snap-fit ​​part 331 and the snap-fit ​​groove at the distal end of the base 210 form an axial limiting fit, and the inner sheath 330 is coaxially sleeved inside the outer sheath 320. The conductive traction rope 340 passes through the inner cavity of the inner sheath 330. The molybdenum wire 233 is set in the annular gap between the outer sheath 320 and the inner sheath 330. The tube wall of the inner sheath 330 forms a physical isolation barrier, which can effectively prevent the molybdenum wire 233 from contacting and short-circuiting with the conductive traction rope 340. The distal end of the molybdenum wire 233 is conductively connected to the circuit electrode 350. The circuit electrode 350 is fixedly installed on the distal outer surface of the outer sheath 320 by a rotary forging process.

[0064] The conductive traction rope 340 includes multiple strands of steel wire rope, with the distal end of the steel wire rope fixedly connected to the distal end component 400 and the proximal end of the steel wire rope fixedly connected to the push-pull rod 130. Furthermore, the conductive traction rope 340 also includes multiple strands of steel wire rope and torque wire to reduce production costs. The multiple strands of steel wire rope and the torque wire are twisted together by at least one of the following methods: welding connection using connecting pipes, crimping connection, or direct butt welding connection or brazing connection; the distal end of the conductive traction rope 340 is a steel wire rope, and the proximal end of the conductive traction rope 340 is a torque wire.

[0065] Remote component 400:

[0066] The distal component 400 comprises a snare 410 and a connecting tube 420. The snare 410 is welded to the conductive traction rope 340 via the connecting tube 420. Besides welding, other connection methods include crimping. In this embodiment, the distal component 400 is a snare device. In other embodiments, the distal component 400 may also include instruments suitable for bipolar handles, such as a cutting knife or electrocautery forceps.

[0067] Second embodiment:

[0068] like Figure 4 The structure of the bipolar electrical processing device 1000 is roughly the same as that of the first embodiment, except that the elastic element 221 is composed of a crown spring 2211 and a coaxially nested spring 2212. The spring 2212 is installed in a compressed state in the internal channel of the crown spring 2211, and its two ends abut against the electrical connection part 22111 of the crown spring 2211 and the first bent part 2222 or the second bent part 2223 of the pole seat 222, respectively. The inner peripheral wall of the electrical connection part 22111 of the crown spring 2211 is electrically connected to the push-pull rod 130 through an interference fit. The crown spring 2211 maintains conductive contact with the first bent part 2222 or the second bent part 2223 of the pole seat 222 through the elastic force of the spring 2212. When the push-pull rod 130 moves axially, the axial compression force of the spring 2212 can ensure the continuous conductive contact between the elastic element 221 and the pole seat 222, thereby improving the conductive stability of the bipolar handle.

[0069] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this application.

Claims

1. A bipolar electrical processing device, characterized in that, include: Conductive traction rope and electrodes; The electrode includes a first electrode and a second electrode; The first electrode includes an electrical connector, a base, and an elastic element; One end of the electrical connector is fixedly inserted into the electrode base. The elastic element has a channel along the axial direction. The conductive traction rope extends axially within the channel. The elastic element has an electrical connection portion that forms a conductive contact with the conductive traction rope. The elastic element includes a distal end and a proximal end. The pole base includes a first end and a second end, the distal end of the elastic element is electrically connected to the first end, and / or the proximal end of the elastic element is electrically connected to the second end.

2. The bipolar electrical processing device according to claim 1, characterized in that, The elastic element includes a crown spring, the distal end of which is electrically connected to a first end of the pole seat, and / or the proximal end of which is electrically connected to a second end.

3. The bipolar electrical processing device according to claim 2, characterized in that, The crown spring also includes a middle section, the inner diameter of which is smaller than the inner diameter of the distal end and the inner diameter of the proximal end, and the inner peripheral wall of the middle section is electrically connected to the conductive traction rope by interference fit.

4. The bipolar electrical processing device according to claim 2, characterized in that, The elastic element also includes a spring, which is disposed in the crown spring channel and is axially compressed. The crown spring maintains conductive contact with the first end or the second end of the pole seat through the elastic force of the spring.

5. The bipolar electrical processing device according to claim 1, characterized in that, The first end of the pole base is provided with a first bend, and the second end of the pole base is provided with a second bend; the first bend abuts against the distal end of the elastic member, and the first bend restricts the elastic member from moving axially to the distal end; the second bend abuts against the proximal end of the elastic member, and the second bend restricts the elastic member from moving axially to the proximal end.

6. The bipolar electrical processing apparatus according to claim 1, characterized in that, The distal end of the electrical connector is provided with a slot, and the middle part of the electrode base is provided with a groove, the groove being interference-fitted with the slot.

7. The bipolar electrical processing apparatus according to claim 1, characterized in that, The second electrode includes a conductor and a conductive wire, the conductor being sleeved on the electrical connector; The proximal end of the conductive wire is electrically connected to the conductor.

8. The bipolar electrical processing apparatus according to claim 7, characterized in that, The bipolar electrical treatment device further includes a sheath, which includes an inner sheath and an outer sheath, with the inner sheath fixed inside the outer sheath. The conductive wire is connected to a conductive component at its distal end, and the conductive component is fixed to the surface of the outer sheath. The conductive wire is fixed between the outer sheath and the inner sheath. The conductive component, the conductive wire, and the conductor form a complete passive circuit electrode.

9. The bipolar electrical processing apparatus according to claim 1, characterized in that, It also includes a handle, a base, and a push-pull rod; The handle is connected to the base; The push-pull rod is movably installed inside the handle and is electrically connected to the conductive traction rope. When the push-pull rod is pushed to move to the distal end, the first end of the pole seat is electrically connected to the distal end of the elastic element; When the push-pull rod is pulled to move towards the proximal end, the second end of the pole seat is electrically connected to the proximal end of the elastic element.

10. The bipolar electrical processing apparatus according to claim 9, characterized in that, It also includes remote components; The conductive traction rope comprises multiple strands of steel wire rope, with the distal end of the steel wire rope fixedly connected to the distal end component and the proximal end of the steel wire rope fixedly connected to the push-pull rod.

11. The bipolar electrical processing apparatus according to claim 10, characterized in that, The conductive traction rope also includes a torque wire, and the multiple strands of the steel wire rope and the torque wire are twisted together by at least one of the following methods: welding connection using connecting pipes, crimping connection, or direct butt welding connection or brazing connection; The distal end of the conductive traction rope is the steel wire rope, and the proximal end of the conductive traction rope is the torque wire.

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