Disposable bipolar electrocoagulation needle for deep liver

Abstract

The invention belongs to the technical field of electrocoagulation hemostasis, and particularly relates to a disposable deep liver bipolar electrocoagulation needle which comprises an electrocoagulation needle body, a locking bush, a movable needle adjusting mechanism, a fixed needle assembly and an automatic indicating assembly, the fixed needle assembly comprises a fixed frame and an overturning part, the overturning part is rotationally arranged on one side of the fixed frame, and the movable needle adjusting mechanism is arranged at the other side of the fixed frame; the movable needle adjusting mechanism comprises an automatic clamping assembly, an adjusting assembly, a transmission assembly and a pre-tightening springback assembly. Through the change of the distance between the first sliding plate and the second sliding plate and the change of the extrusion force, a movable electrocoagulation needle body can be automatically clamped and loosened; by means of linkage of the transmission assembly, when the handle part is rotated, the two sliding nuts get close to or away from each other synchronously, so that the position of the first sliding plate is adjusted, and then the distance between the two electrocoagulation needle bodies is adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of electrocoagulation hemostasis, and in particular relates to a disposable deep liver bipolar electrocoagulation needle. Background Art

[0002] During hepatobiliary surgery, electrocautery, electrocoagulation hooks, electrocoagulation rods, and electrocoagulation forceps are commonly used surgical instruments, primarily for coagulation and hemostasis of exposed blood vessels and superficial tissue structures within the surgical wound surface, as well as for incision and segmentation. Due to the liver's rich blood supply and complex internal vascular system (including the hepatic arterial system, hepatic venous system, portal vein system, and biliary system), incomplete intraoperative coagulation of the liver section allows for the retraction of blood vessels deep within the liver parenchyma, a common cause of persistent bleeding from the liver section. The difficulty in localizing and achieving complete hemostasis deep within the liver during hepatectomy has long plagued surgeons and is a major factor hindering the advancement of hepatectomy techniques (such as laparoscopic or robotic hepatectomy). Consequently, the accuracy, stability, and thoroughness of hemostatic instruments are extremely demanding during surgery, particularly in the adjustment of the spacing between the two poles of the bipolar electrocoagulation needle, fixation stability, and puncture location guidance, which directly impact surgical outcomes and patient safety.

[0003] Currently, traditional bipolar coagulation needles have the following problems: The relative positions of the two independent coagulation needles are uncertain, making it difficult to precisely control the area requiring coagulation.

[0004] Existing fixation devices have poor stability and low adjustment accuracy: the fixation of the electrocoagulation needle and the adjustment bracket mostly relies on mechanical clamping, which is prone to longitudinal slippage or rotation due to external force during surgical operations, affecting the accuracy of coagulation and hemostasis, and may even cause accidental injury to normal tissues.

[0005] Lack of puncture guidance: During deep liver surgery, the precise positioning of the electrocoagulation needle puncture position depends on the doctor's experience and lacks intuitive visual guidance. Especially when the lesion is located deep or the field of view is limited, puncture deviation is prone to occur, increasing the risk of surgery. Summary of the Invention

[0006] In response to the above situation and to overcome the shortcomings of the prior art, the present invention proposes a disposable deep liver bipolar electrocoagulation needle. By changing the spacing and squeezing force between the first and second slides, the movable electrocoagulation needle body can be automatically clamped and released. By the linkage of the transmission assembly, the two sliding nuts can be synchronously moved closer or farther apart when the handle is rotated, thereby adjusting the position of the first slide and further adjusting the spacing between the two electrocoagulation needle bodies. In addition, by the elastic force of the pre-tightening spring, the movement of the second sliding plate can be controlled, the first sliding plate and the second sliding plate are kept relaxed when moving away from the locking sleeve, at this time, it is beneficial to the installation and disassembly of the electrocoagulation needle body, and the electrocoagulation needle body can be directly adjusted longitudinally; the first sliding plate and the second sliding plate are kept clamped when moving close to the locking sleeve, at this time, it is beneficial to maintain the stability and controllability of the electrocoagulation needle body.

[0007] The technical scheme adopted by the present application is as follows: the present application provides a disposable deep liver bipolar electrocoagulation needle, which comprises an electrocoagulation needle body, a locking sleeve, a movable needle adjusting mechanism, a fixed needle assembly and an automatic indicating assembly, the fixed needle assembly comprises a fixed frame and a turnover part, the turnover part is rotationally arranged on one side of the fixed frame, the movable needle adjusting mechanism comprises an automatic clamping assembly, an adjusting assembly, a transmission assembly and a pre-tightening springback assembly, the automatic clamping assembly is slidingly arranged on the fixed frame, the adjusting assembly is rotationally arranged on the fixed frame, the transmission assembly is arranged between the automatic clamping assembly and the adjusting assembly, and the pre-tightening springback assembly is arranged between the automatic clamping assembly and the fixed frame.

[0008] Further, the electrocoagulation needle body is composed of a metal needle rod, an insulating handle and a wire.

[0009] The fixed frame is provided with a transverse sliding groove, the automatic clamping assembly comprises a first sliding plate, a second sliding plate and a rubber needle sleeve, the first sliding plate and the second sliding plate are clamped and slidingly arranged in the transverse sliding groove, the rubber needle sleeve is arranged between the first sliding plate and the second sliding plate, one of the electrocoagulation needle bodies is arranged in the rubber needle sleeve through the metal needle rod, the surface of the metal needle rod arranged in the rubber needle sleeve is provided with a spiral thread, and the rubber needle sleeve is composed of two arc-shaped parts which are respectively fixedly connected to the inner concave surfaces of the first sliding plate and the second sliding plate.

[0010] By changing the spacing and extrusion force between the first sliding plate and the second sliding plate, the movable electrocoagulation needle body can be automatically clamped and released.

[0011] As preferred, the adjusting assembly comprises a shaft sleeve, an adjusting screw rod and a sliding nut, the fixed frame is provided with a longitudinal through hole, the shaft sleeve is arranged at both ends of the longitudinal through hole, the adjusting screw rod is rotationally arranged in the shaft sleeve, and the top end of the adjusting screw rod is provided with a handle part.

[0012] As further preferred, opposite threads are symmetrically arranged on the adjusting screw rod, the fixed frame is provided with a longitudinal sliding groove at the longitudinal through hole, the sliding nut is clamped and slidingly arranged in the longitudinal sliding groove, and the sliding nut and the adjusting screw rod are threadedly connected.

[0013] As preferred, the transmission assembly comprises a hinged seat and a hinged connecting rod, the hinged connecting rod is respectively arranged on the sliding nut and the first sliding plate, and the two ends of the hinged connecting rod are hingedly connected with the hinged seat.

[0014] Through the linkage of the transmission assembly, the two sliding nuts can be synchronously moved closer or farther away when the handle portion is rotated, thereby adjusting the position of the first slide and further adjusting the distance between the two electrocoagulation needle bodies.

[0015] As a further preferred embodiment of the present invention, the preloaded rebound assembly includes a telescopic sleeve, a telescopic rod and a preloaded spring, the telescopic sleeve is arranged on the inner wall of the fixed frame, the telescopic rod is arranged on the second slide, the telescopic rod is engaged and slidably arranged in the telescopic sleeve, the preloaded spring is sleeved on the outside of the telescopic sleeve and the telescopic rod, and the preloaded spring is arranged between the second slide and the fixed frame.

[0016] The movement of the second slide can be controlled by the elastic force of the preloaded spring, so that the first slide and the second slide remain relaxed when they are away from the locking bushing. This is beneficial for the installation and disassembly of the electrocoagulation needle body and can also directly adjust the electrocoagulation needle body longitudinally; the first slide and the second slide remain clamped when they are close to the locking bushing, which is beneficial for maintaining the stability and controllability of the electrocoagulation needle body.

[0017] When the metal needle rod is clamped by the rubber needle sleeve, the inner wall of the rubber needle sleeve will automatically form a groove that matches the thread pattern. At this time, by rotating the insulating handle, the relative tip depth of the two electrocoagulation needle bodies can still be adjusted again.

[0018] As a further preferred embodiment of the present invention, the flip part can be locked and unlocked relative to the fixed frame, and the locking bushing is composed of two arc-shaped parts, which are respectively fixed to the inner concave surfaces of the handle part and the flip part. The other part of the electrocoagulation needle body is arranged in the locking bushing through a metal needle rod, and the surface array of the metal needle rod located in the locking bushing is provided with annular patterns.

[0019] The annular lines have the characteristic of maintaining the longitudinal position, so that the electrocoagulation needle body clamped by the locking bushing will not slide longitudinally after the flip part is closed.

[0020] Furthermore, the fixed needle assembly also includes an expansion plate, which is fixed to the flip part and is provided with an interface for connecting to an external manipulator.

[0021] Furthermore, the automatic indication component includes an elastic rope and an indication light source, the two ends of the elastic rope are respectively arranged on the second slide and the fixed frame, the indication light source array is arranged on the elastic rope, the metal needle rods of the two electrocoagulation needle bodies are located at the two ends of the automatic indication component, and the light direction of the indication light source is parallel to the direction of the metal needle rod.

[0022] The indicator light source will project a section of light onto the target surface. The puncture position of the metal needle rod is located at both ends of the projected light of the automatic indicator component, and the length of the light can be automatically adjusted accordingly with the adjustment of the movable needle adjustment mechanism to provide guidance for puncture.

[0023] In addition to handheld operation, this solution can also be connected to a robotic arm through an expansion board for automatic puncture operation.

[0024] The beneficial effects achieved by the present invention using the above structure are as follows: (1) By changing the distance and the extrusion force between the first slide plate and the second slide plate, the movable electrocoagulation needle body can be automatically clamped and released.

[0025] (2) Through the linkage of the transmission assembly, the two sliding nuts can be synchronously moved closer or farther away when the handle is rotated, thereby adjusting the position of the first slide and further adjusting the distance between the two electrocoagulation needle bodies.

[0026] (3) The movement of the second slide can be controlled by the elastic force of the preloaded spring, so that the first slide and the second slide remain relaxed when they are away from the locking bushing. This is beneficial for the installation and removal of the electrocoagulation needle body and can also directly adjust the electrocoagulation needle body longitudinally. When the first slide and the second slide are close to the locking bushing, they remain clamped, which is beneficial for maintaining the stability and controllability of the electrocoagulation needle body.

[0027] (4) When the metal needle rod is clamped by the rubber needle sleeve, the inner wall of the rubber needle sleeve will automatically form a groove that matches the thread pattern. At this time, by rotating the insulating handle, the relative tip depth of the two electrocoagulation needle bodies can still be adjusted again.

[0028] (5) The annular pattern has the characteristic of maintaining the longitudinal position, so that the electrocoagulation needle body clamped by the locking bushing will not slip longitudinally after the flip part is closed.

[0029] (6) The indicator light source will project a section of light onto the target surface. The puncture position of the metal needle rod is located at both ends of the projected light of the automatic indicator component, and the length of the light can be automatically adjusted accordingly with the adjustment of the movable needle adjustment mechanism to provide guidance for puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A stereoscopic diagram of the disposable deep liver bipolar electrocoagulation needle proposed by the present invention; Figure 2 This is a front view of the disposable deep liver bipolar electrocoagulation needle proposed by the present invention; Figure 3 This is a left view of the disposable deep liver bipolar electrocoagulation needle proposed by the present invention; Figure 4for Figure 3 A cross-sectional view along the cutting line AA; Figure 5 for Figure 2 A cross-sectional view along the cutting line BB; Figure 6 for Figure 4 A partial enlarged view of point Ⅰ in the middle; Figure 7 for Figure 5 A partial enlarged view of the middle II; Figure 8 Schematic diagram indicating the distribution of light sources.

[0031] Among them, 1. electrocoagulation needle body, 2. locking bushing, 3. movable needle adjustment mechanism, 4. fixed needle assembly, 5. automatic indication assembly, 6. metal needle rod, 7. insulating handle, 8. wire, 9. automatic clamping assembly, 10. adjustment assembly, 11. transmission assembly, 12. preload rebound assembly, 13. first slide, 14. second slide, 15. rubber needle sleeve, 16. shaft sleeve, 17. adjustment screw, 18. sliding nut, 19. articulated seat, 20. articulated connecting rod, 21. telescopic sleeve, 22. telescopic rod, 23. preload spring, 24. handle part, 25. fixed frame, 26. flip part, 27. expansion plate, 28. horizontal slide, 29. longitudinal slide, 30. longitudinal through hole, 31. elastic rope, 32. indicator light source.

[0032] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0035] like Figures 1 to 7As shown, the present invention proposes a disposable deep liver bipolar coagulation needle, including a coagulation needle body 1, a locking bushing 2, a movable needle adjustment mechanism 3, a fixed needle assembly 4 and an automatic indication assembly 5. The fixed needle assembly 4 includes a fixing frame 25 and a flip part 26. The flip part 26 is rotatably arranged on one side of the fixing frame 25. The movable needle adjustment mechanism 3 includes an automatic clamping assembly 9, an adjustment assembly 10, a transmission assembly 11 and a pre-tightening rebound assembly 12. The automatic clamping assembly 9 is slidably arranged on the fixing frame 25, the adjustment assembly 10 is rotatably arranged on the fixing frame 25, the transmission assembly 11 is arranged between the automatic clamping assembly 9 and the adjustment assembly 10, and the pre-tightening rebound assembly 12 is arranged between the automatic clamping assembly 9 and the fixing frame 25.

[0036] The electrocoagulation needle body 1 is composed of a metal needle rod 6 , an insulating handle 7 and a wire 8 .

[0037] A transverse slide groove 28 is provided on the fixing frame 25, and the automatic clamping assembly 9 includes a first slide 13, a second slide 14 and a rubber needle sleeve 15. The first slide 13 and the second slide 14 are engaged and slidably arranged in the transverse slide groove 28, and the rubber needle sleeve 15 is arranged between the first slide 13 and the second slide 14. One of the electrocoagulation needle bodies 1 is arranged in the rubber needle sleeve 15 through the metal needle rod 6. The surface of the metal needle rod 6 located in the rubber needle sleeve 15 is provided with spiral patterns. The rubber needle sleeve 15 consists of two arc-shaped parts, and the two arc-shaped parts are respectively fixed to the inner concave surfaces of the first slide 13 and the second slide 14.

[0038] By changing the distance between the first slide plate 13 and the second slide plate 14 and the squeezing force, the movable electrocoagulation needle body 1 can be automatically clamped and released.

[0039] The adjustment assembly 10 includes a sleeve 16, an adjusting screw 17 and a sliding nut 18. A longitudinal through hole 30 is provided on the fixing frame 25. The sleeve 16 is provided at both ends of the longitudinal through hole 30. The adjusting screw 17 is rotatably provided in the sleeve 16. A handle portion 24 is provided at the top end of the adjusting screw 17.

[0040] The adjusting screw rod 17 is symmetrically provided with threads in opposite directions. The fixing frame 25 is provided with a longitudinal slot 29 at the longitudinal through hole 30. The sliding nut 18 is engaged and slidably arranged in the longitudinal slot 29. The sliding nut 18 and the adjusting screw rod 17 are threadedly connected.

[0041] The transmission assembly 11 includes an articulated seat 19 and an articulated connecting rod 20 . The articulated connecting rod 20 is respectively provided on the sliding nut 18 and the first slide plate 13 . Both ends of the articulated connecting rod 20 are hinged to the articulated seat 19 .

[0042] Through the linkage of the transmission assembly 11 , the two sliding nuts 18 can be synchronously moved closer or farther away when the handle portion 24 is rotated, thereby adjusting the position of the first slide 13 and further adjusting the distance between the two electrocoagulation needle bodies 1 .

[0043] The preloaded rebound assembly 12 includes a telescopic sleeve 21, a telescopic rod 22 and a preloaded spring 23. The telescopic sleeve 21 is arranged on the inner wall of the fixed frame 25, the telescopic rod 22 is arranged on the second slide 14, the telescopic rod 22 is engaged and slidably arranged in the telescopic sleeve 21, the preloaded spring 23 is sleeved on the outside of the telescopic sleeve 21 and the telescopic rod 22, and the preloaded spring 23 is arranged between the second slide 14 and the fixed frame 25.

[0044] Through the elastic force of the preloaded spring 23, the movement of the second slide 14 can be controlled, so that the first slide 13 and the second slide 14 remain relaxed when they are away from the locking bushing 2. This is beneficial for the installation and disassembly of the electrocoagulation needle body 1, and can also directly adjust the electrocoagulation needle body 1 longitudinally; when the first slide 13 and the second slide 14 are close to the locking bushing 2, they remain clamped, which is beneficial for maintaining the stability and controllability of the electrocoagulation needle body 1.

[0045] When the metal needle rod 6 is clamped by the rubber needle sleeve 15, the inner wall of the rubber needle sleeve 15 will automatically form a groove matching the thread pattern. At this time, the relative tip depths of the two electrocoagulation needle bodies 1 can still be adjusted again by rotating the insulating handle 7.

[0046] The flip portion 26 can be locked and unlocked relative to the fixing frame 25. The locking bushing 2 is composed of two arc-shaped parts, which are respectively fixed to the inner concave surfaces of the handle portion 24 and the flip portion 26. The other part of the electrocoagulation needle body 1 is arranged in the locking bushing 2 through the metal needle rod 6. The surface array of the metal needle rod 6 located in the locking bushing 2 is provided with annular patterns.

[0047] The annular lines have the characteristic of maintaining the longitudinal position, so that the electrocoagulation needle body 1 clamped by the locking bushing 2 will not slide longitudinally after the flip portion 26 is closed.

[0048] The fixed needle assembly 4 further includes an expansion plate 27 , which is fixed to the flip portion 26 . The expansion plate 27 is provided with an interface for connecting to an external manipulator.

[0049] The automatic indication component 5 includes an elastic rope 31 and an indication light source 32. The two ends of the elastic rope 31 are respectively arranged on the second slide 14 and the fixed frame 25. The indication light source 32 array is arranged on the elastic rope 31. The metal needle rods 6 of the two electrocoagulation needle bodies 1 are located at the two ends of the automatic indication component 5. The light direction of the indication light source 32 is parallel to the direction of the metal needle rod 6.

[0050] The indicator light source 32 will project a section of light on the target surface. The puncture position of the metal needle rod 6 is located at both ends of the projected light of the automatic indicator component 5, and the length of the light can be automatically adjusted accordingly with the adjustment of the movable needle adjustment mechanism 3 to provide guidance for puncture.

[0051] In addition to being able to be operated by hand, this solution can also be connected to a robotic arm via an expansion board 27 for automatic puncture operation.

[0052] like Figure 8 As shown, the figure is a schematic diagram of the projection light of the indicator light source 32. As the elastic rope 31 expands and contracts, the total length of the indicator light source 32 will change, and the spacing between the indicator light sources 32 will also change. However, since the spacing between the indicator light source 32 located at the end and the metal needle rod 6 remains unchanged, the accuracy of the indicated position can be guaranteed. At the same time, in order to ensure the continuity of the projected light, the indicator light sources 32 emitting parallel light can overlap.

[0053] When in use, the device can be operated by a doctor by hand, or it can be connected to a robotic arm through the expansion board 27 for automatic operation.

[0054] The electrocoagulation needle body 1 needs to be installed before use. Since the electrocoagulation needle body 1 in the entire device will contact the lesion site, it can be a disposable consumable part, and the other adjustment brackets can be reused after disinfection.

[0055] First, place the metal needle rod 6 with annular patterns in the opened flip part 26, and then close and lock the flip part 26. At this time, the locking bushing 2 will cooperate with the annular patterns through its own deformation under extrusion to complete the fixation of an electrocoagulation needle body 1. After that, although the electrocoagulation needle body 1 can be rotated under the action of external force, the longitudinal position can no longer be adjusted.

[0056] Then, the metal needle rod 6 with the spiral pattern is placed in the loose rubber needle sleeve 15, and then the handle 24 is rotated to push the first slide 13 toward the second slide 14 by moving the sliding nut 18 away from each other; After the rubber needle sleeves 15 on both sides contact the metal needle rod 6 at the same time, continue to rotate the handle part 24. During the process of the first slide 13 pushing the second slide 14 to slide, due to the compression of the preload spring 23, the extrusion force of the rubber needle sleeve 15 on the metal needle rod 6 increases. At this time, the rubber needle sleeve 15 will complete the fixation of an electrocoagulation needle body 1 by coordinating its own deformation and spiral texture under the extrusion.

[0057] As long as the compression of the preload spring 23 exceeds a certain amplitude, the rubber needle sleeve 15 can maintain the fixation of the electrocoagulation needle body 1 when the compression continues.

[0058] If one wishes to adjust the relative tip depths of the two electrocoagulation needle bodies 1 , one only needs to rotate the electrocoagulation needle body 1 in the rubber needle sleeve 15 to adjust it longitudinally.

[0059] During the sliding of the second slide 14, the total length of the elastic rope 31 changes accordingly, so the length of the light emitted by the indicator light source 32 also changes. The puncture position of the metal needle rod 6 is located at both ends of the projected light of the automatic indicator component 5, and the length of the light can be automatically adjusted accordingly with the adjustment of the movable needle adjustment mechanism 3, providing guidance for puncture.

[0060] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0061] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. Disposable deep liver bipolar electrocoagulation needle, characterized by: The invention comprises an electrocoagulation needle body (1), a locking bushing (2), a movable needle adjustment mechanism (3), a fixed needle assembly (4) and an automatic indication assembly (5), wherein the fixed needle assembly (4) comprises a fixing frame (25) and a flipping portion (26), wherein the flipping portion (26) is rotatably arranged on one side of the fixing frame (25), and the movable needle adjustment mechanism (3) comprises an automatic clamping assembly (9), an adjustment assembly (10), a transmission assembly (11) and a pre-tightening rebound assembly (12), wherein the automatic clamping assembly (9) is slidably arranged on the fixing frame (25), the adjustment assembly (10) is rotatably arranged on the fixing frame (25), the transmission assembly (11) is arranged between the automatic clamping assembly (9) and the adjustment assembly (10), and the pre-tightening rebound assembly (12) is arranged between the automatic clamping assembly (9) and the fixing frame (25).

2. The disposable deep liver bipolar electrocoagulation needle according to claim 1, characterized in that: The electrocoagulation needle body (1) is composed of a metal needle rod (6), an insulating handle (7) and a wire (8).

3. The disposable deep liver bipolar electrocoagulation needle according to claim 2, characterized in that: The fixing frame (25) is provided with a transverse slide groove (28), and the automatic clamping assembly (9) includes a first slide plate (13), a second slide plate (14) and a rubber needle sleeve (15), wherein the first slide plate (13) and the second slide plate (14) are engaged and slidably arranged in the transverse slide groove (28), and the rubber needle sleeve (15) is arranged between the first slide plate (13) and the second slide plate (14), and one of the electrocoagulation needle bodies (1) is arranged in the rubber needle sleeve (15) through a metal needle rod (6), and the surface of the metal needle rod (6) located in the rubber needle sleeve (15) is provided with spiral patterns, and the rubber needle sleeve (15) consists of two arc-shaped parts, and the two arc-shaped parts are respectively fixed to the inner concave surfaces of the first slide plate (13) and the second slide plate (14).

4. The disposable deep liver bipolar electrocoagulation needle according to claim 3, characterized in that: The adjusting assembly (10) includes a shaft sleeve (16), an adjusting screw rod (17) and a sliding nut (18); a longitudinal through hole (30) is provided on the fixing frame (25); the shaft sleeve (16) is provided at both ends of the longitudinal through hole (30); the adjusting screw rod (17) is rotatably provided in the shaft sleeve (16); and a handle portion (24) is provided at the top end of the adjusting screw rod (17).

5. The disposable deep liver bipolar electrocoagulation needle according to claim 4, characterized in that: The adjusting screw rod (17) is symmetrically provided with threads in opposite directions. The fixing frame (25) is provided with a longitudinal slide groove (29) at the longitudinal through hole (30). The sliding nut (18) is engaged and slidably arranged in the longitudinal slide groove (29). The sliding nut (18) and the adjusting screw rod (17) are threadedly connected.

6. The disposable deep liver bipolar electrocoagulation needle according to claim 5, characterized in that: The transmission assembly (11) comprises an articulated seat (19) and an articulated connecting rod (20), wherein the articulated connecting rod (20) is respectively arranged on the sliding nut (18) and the first slide plate (13), and both ends of the articulated connecting rod (20) are articulated to the articulated seat (19).

7. The disposable deep liver bipolar electrocoagulation needle according to claim 6, characterized in that: The preloaded rebound assembly (12) comprises a telescopic sleeve (21), a telescopic rod (22) and a preloaded spring (23); the telescopic sleeve (21) is arranged on the inner wall of the fixing frame (25); the telescopic rod (22) is arranged on the second slide (14); the telescopic rod (22) is engaged and slidably arranged in the telescopic sleeve (21); the preloaded spring (23) is sleeved on the outside of the telescopic sleeve (21) and the telescopic rod (22); and the preloaded spring (23) is arranged between the second slide (14) and the fixing frame (25).

8. The disposable deep liver bipolar electrocoagulation needle according to claim 7, characterized in that: The flip portion (26) can be locked and unlocked relative to the fixing frame (25), and the locking bushing (2) is composed of two arc-shaped parts, which are respectively fixed to the inner concave surfaces of the handle portion (24) and the flip portion (26). The other part of the electrocoagulation needle body (1) is arranged in the locking bushing (2) through the metal needle rod (6), and the surface array of the metal needle rod (6) located in the locking bushing (2) is provided with an annular pattern.

9. The disposable deep liver bipolar electrocoagulation needle according to claim 8, characterized in that: The fixed needle assembly (4) further comprises an expansion plate (27), wherein the expansion plate (27) is fixedly connected to the flip portion (26), and an interface for connecting to an external manipulator is provided on the expansion plate (27).

10. The disposable deep liver bipolar electrocoagulation needle according to claim 9, characterized in that: The automatic indicating assembly (5) includes an elastic rope (31) and an indicating light source (32), the two ends of the elastic rope (31) are respectively arranged on the second slide (14) and the fixing frame (25), the indicating light source (32) array is arranged on the elastic rope (31), the metal needle rods (6) of the two electrocoagulation needle bodies (1) are located at the two ends of the automatic indicating assembly (5), and the optical fiber direction of the indicating light source (32) is parallel to the direction of the metal needle rod (6).

Images