Electrocoagulation scissors

Abstract

The invention discloses a pair of electrocoagulation scissors, which belongs to the field of medical instruments, and comprises a movable shearing electrode, which comprises an elastic substrate and a plurality of shearing sheets which are connected with each other, and the plurality of shearing sheets are distributed on the outer wall of the elastic substrate in a linear array manner; the fixed shearing electrode and the movable shearing electrode are rotationally connected around the same axis, and the movable shearing electrode can move to an initial position and is parallel to the fixed shearing electrode; the fixed shearing electrode comprises a shearing blade, the movable shearing electrode can move towards the fixed shearing electrode to a contact position, and the outer wall of the shearing blade abuts against one shearing sheet when the movable shearing electrode is located at the contact position; and when the movable shearing electrode at the contact position rotates towards the fixed shearing electrode, the elastic substrate generates elastic deformation and pushes the shearing sheets to sequentially abut against the shearing blades. By means of the arrangement, target tissue can be efficiently cut off in a narrow wound of the head.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an electrocoagulation scissors. Background Art

[0002] Intracranial tumors are one of the important causes of death or disability in patients, and most tumors need to be removed through craniotomy. Tumor cutting tools are key instruments for removing tumors, especially relatively hard and tough tumors, such as meningiomas, which are the primary intracranial tumors with the highest incidence rate. They are difficult to cut. Good cutting instruments can greatly improve surgical efficiency and shorten surgical time. Usually, tumors are supplied by blood vessels. We need to use bipolar electrosurgery to electrocoagulate tumor tissue to achieve hemostasis and carbonization of tissue. The principle is that the tissue becomes soft after carbonization and is easier to cut. Then replace the microscissors to cut. In this process, it is necessary to constantly replace the bipolar electrosurgery and microscissors. The action is cumbersome, takes a long time, and increases the collateral damage caused by the instruments entering and exiting the cranial cavity. Electrocoagulation scissors can combine the functions of the two instruments to improve the cutting efficiency of tumors, shorten the operation time, and reduce collateral damage to brain tissue.

[0003] However, the nerves and blood vessels in the brain are densely packed, so the wounds made during the shearing operation are often small in diameter and deep. The current shearing tools used for shearing of intracranial tissues are mainly based on the principle of levers to apply pressure to the tissue to be sheared, and the shearing head as the resistance arm is driven by a larger power arm to squeeze and shear the tumor tissue, which makes the length of the shearing head shorter and the shearing efficiency lower. However, using a longer shearing head to insert into the patient's skull for shearing operations can easily injure the surrounding tissues in the patient's skull.

[0004] Therefore, a device is designed that can efficiently cut the tissue to be cut in a narrow wound on the head, and the device is specifically an electrocoagulation shears. Summary of the invention

[0005] In order to overcome the problems raised in the background technology, the present invention adopts the following technical solutions: An electrocoagulation shear comprises: a movable shearing electrode, comprising an elastic substrate and shearing pieces connected to each other, wherein a plurality of said shearing pieces are linearly arrayed and distributed on the outer wall of said elastic substrate; a fixed shearing electrode, rotatably connected with said movable shearing electrode around the same axis, said movable shearing electrode being able to move to an initial position and being parallel to said fixed shearing electrode; said fixed shearing electrode comprising a shearing blade, said movable shearing electrode being able to move toward said fixed shearing electrode to a contact position, wherein the outer wall of said shearing blade abuts against one of said shearing pieces when said movable shearing electrode is in the contact position; when said movable shearing electrode in the contact position rotates toward said fixed shearing electrode, said elastic substrate generates elastic deformation and pushes said shearing pieces to abut against said shearing blade in turn. When said movable shearing electrode is in the initial position, it is parallel to said fixed shearing electrode, and at this time, the electrodes on both sides are completely out of contact; when said movable shearing electrode moves toward said fixed shearing electrode, the distance between the electrodes moving in opposite directions is shortened.

[0006] Furthermore, the movable shearing electrode and the fixed shearing electrode both have a proximal end close to the rotating connection and a distal end away from the rotating connection. When the movable shearing electrode is in the initial position, the proximal end of the movable shearing electrode is flush with the proximal end of the fixed shearing electrode; when the movable shearing electrode passes the contact position and continues to move toward the fixed shearing electrode, the deformed elastic substrate drives the shearing piece in contact with the shearing blade to move linearly along the shearing blade toward the distal end.

[0007] Furthermore, the dynamic shearing electrode also includes an insulating part 1, which is provided with a track cavity, and a part of an elastic substrate connected with a plurality of shearing pieces is provided in the track cavity; a reset piece 1 is provided between the end of the elastic substrate away from the proximal end and the inner wall of the track cavity, and the reset piece 1 is elastic. When the elastic substrate is deformed, the reset piece 1 is squeezed and compressed to store energy, and when the reset piece 1 relaxes and releases the elastic potential energy, it pushes the elastic substrate to move toward the distal end along the track cavity. When the dynamic shearing electrode continues to rotate from the contact position to the shearing blade, the shearing piece pushes the elastic substrate under the pressure of the shearing blade and applies a component force pointing to the distal end to the reset piece 1. When all the shearing pieces are in contact with the shearing blade or the dynamic shearing electrode stops rotating, the reset piece 1 releases part of the elastic potential energy and pushes the shearing piece to move in a straight line along the shearing blade, which is conducive to improving the cutting frequency of the shearing blade and the shearing piece.

[0008] Furthermore, the fixed shearing electrode further includes an insulating portion 2, which is coaxially connected to the insulating portion; when the insulating portion 1 and the insulating portion 2 move relative to each other, the elastic substrate is driven to move toward the shearing blade. By providing the insulating portion, only the shearing blade, the shearing piece and the elastic substrate are charged during the electrocoagulation operation, thereby reducing the risk of electric shock, and preventing the insulating portion 1 and the insulating portion 2, which are relatively wide, from adhering to the patient's wound under the action of electricity and high temperature.

[0009] Furthermore, it also includes a connecting shaft, the insulating part 1 and the insulating part 2 are respectively provided with an axial hole, and the connecting shaft is sleeved in the axial holes of the insulating part 1 and the insulating part 2, so that the insulating part 1 and the insulating part 2 are coaxially connected for rotation.

[0010] Furthermore, the end of the insulating part 1 facing away from the shearing blade and the end of the insulating part 2 facing away from the elastic substrate are both provided with handles, and the two handles are arranged opposite to each other. The two outer walls opposite to each other of the two handles are provided with reset components 2. When the handles are not subjected to external force, they are stretched open by the reset components 2 and the movable shearing electrode is maintained in the initial position. When the fixed shearing electrode is separated from the initial position, the reset component 2 undergoes elastic deformation.

[0011] Furthermore, the shearing piece has a friction surface 1, and the shearing blade has a friction surface 2. When the shearing blade abuts against the shearing piece, the friction surface 1 and the friction surface 2 overlap. A limiting groove is provided on the friction surface 2, and the limiting groove is parallel to the shearing blade. When the shearing blade abuts against the shearing piece one by one, the shearing piece has a tendency to move along the friction surface 2 toward the back of the shearing blade, and the limiting groove can limit the maximum distance that each shearing piece moves toward the shearing blade on the friction surface 2.

[0012] Furthermore, it also includes at least two lead wires, one end of which is connected to the shear blade, and the other end of the lead wire passes through the insulating part 2 and penetrates one of the handles; one end of the other lead wire is connected to the elastic substrate, and the other end of the lead wire passes through the insulating part 1 and penetrates the other handle; the two lead wires extend from the ends of the two handles away from the shear blade, respectively, and any two lead wires do not contact each other. The part of the lead wire extending from the end of the handle away from the shear blade is connected to a device that can provide energy, so that the shear blade and the shear piece can be energized when the movable shear electrode moves to the contact position, so that the movable shear electrode and the fixed shear electrode have an electrocoagulation effect.

[0013] Furthermore, when the movable shearing electrode is in the initial position, the shearing piece of the movable shearing electrode is opposite to the shearing edge of the fixed shearing electrode, and a shearing region is formed between the shearing piece and the shearing edge. The area of ​​the shearing region reaches a maximum value when the movable shearing electrode is in the initial position.

[0014] Furthermore, the insulating part 2 is provided with a limiting boss 1 and a limiting boss 2. When the movable shearing electrode moves to the initial position, the outer wall of the insulating part 1 abuts against the limiting boss 1. When all the shearing pieces are in contact with the shearing blade, the outer wall of the insulating part 1 abuts against the limiting boss 2. The limiting boss 1 and the limiting boss 2 limit the rotation stroke of the fixed shearing electrode, thereby preventing the fixed shearing electrode from breaking through the motion limit of the limiting groove when rotating, which is beneficial to improving the safety of tissue electrocoagulation shearing.

[0015] Beneficial effects of the present invention: By setting the dynamic shearing electrode and the fixed shearing electrode in parallel at the initial position, a shearing area with a constant spacing is provided between the electrodes on both sides, which can greatly improve the shearing efficiency when cutting a narrow and long tissue to be sheared, and the electrodes on both sides are energized when they are in contact, which can reduce the pressure required for shearing the target tissue by carbonizing it first and then breaking it, and can stop the bleeding of the wound at the same time; by setting an elastic substrate and a shearing piece, the deformed elastic substrate makes the points on the shearing piece and the shearing blade not correspond one to one, and the shearing piece that first contacts the shearing blade will be pushed to the far end of the fixed shearing electrode during the continuous deformation of the elastic substrate, which makes the shearing piece apply continuous cutting in addition to extruding and cutting the tissue to be sheared, so that the part that cannot be separated during the extrusion and cutting process can be broken, and a better shearing effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 It is a schematic diagram of an assembly structure of the present invention when the movable shear electrode is in the initial position; Figure 2 for Figure 1 A schematic diagram of a local structure at A in the middle; Figure 3 for Figure 2 A schematic diagram of a local structure at B in the middle; Figure 4 for Figure 3 A schematic diagram of a cross-sectional structure; Figure 5 for Figure 2 A schematic diagram of a local structure at C in the middle; Figure 6 for Figure 5 A schematic diagram of a local structure at D in the middle; Figure 7 A schematic diagram of a local structure of the present invention when the movable shear electrode is in a contact position; Figure 8 It is a schematic diagram of an assembly structure of the present invention when part of the shearing pieces are in contact with the shearing blades and the lead wires are not assembled; Fig. 9 for Figure 8 A schematic diagram of a local structure at E in the middle; Fig.10 for Fig. 9 A schematic diagram of a local structure at F in the middle; Fig.11 for Fig. 9 A schematic diagram of a local structure at G in the middle; Fig.12 for Fig. 9 Another local structure diagram at G in the middle; In the figure, 1. dynamic shearing electrode; 11. elastic substrate; 12. shearing piece; 121. friction surface one; 13. insulating part one; 131. track cavity; 14. reset part one; 2. fixed shearing electrode; 21. shearing blade; 211. friction surface two; 212. limiting groove; 22. proximal end; 23. distal end; 24. insulating part two; 241. limiting boss one; 242. limiting boss two; 3. connecting shaft; 4. handle; 41. reset part two; 5. lead wire. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] An electrocoagulation shears, such as Figure 1-12As shown, it includes: a movable shearing electrode 1, which includes an elastic substrate 11 and a shearing piece 12 connected to each other, and a plurality of the shearing pieces 12 are linearly arrayed and distributed on the outer wall of the elastic substrate 11; a fixed shearing electrode 2, which is rotatably connected with the movable shearing electrode 1 around the same axis, and the movable shearing electrode 1 can move to an initial position and be parallel to the fixed shearing electrode 2; the fixed shearing electrode 2 includes a shearing blade 21, and the movable shearing electrode 1 can move toward the fixed shearing electrode 2 to a contact position, and the outer wall of the shearing blade 21 abuts against one of the shearing pieces 12 when the movable shearing electrode 1 is in the contact position; when the movable shearing electrode 1 in the contact position rotates toward the fixed shearing electrode 2, the elastic substrate 11 generates elastic deformation and pushes the shearing piece 12 to abut against the shearing blade 21 in turn. When the movable shearing electrode 1 is in the initial position, it is parallel to the fixed shearing electrode 2, and the electrodes on both sides are completely out of contact; when the movable shearing electrode 1 moves toward the fixed shearing electrode 2, the distance between the electrodes moving in opposite directions will only be shortened. When conventional scissors are shearing, the proximal ends 22 of the two opposing blades close to the rotating shaft first begin to contact and cut the material between the blades by squeezing. In this cutting method, the distance between the distal ends 23 of the blades increases with the length of the blades. Therefore, the blades of scissors used to shear large pieces of tissue are generally longer, and the longer conventional blades cannot be flexibly opened and closed in the narrow operating space, so they are not suitable for electrocoagulation shearing of the patient's intracranial tissue; when dealing with the tissue to be sheared in the narrow and long intracranial wound, the scheme of the moving shearing electrode 1 and the fixed shearing electrode 2 can be closed from the distal end 23 to the proximal end 22 in the narrow and long treatment space, and thus can ensure that the opening and closing amplitude remains unchanged when the length of the blade changes, so that the tissue can be flexibly sheared inside narrow and long wounds of various depths.

[0019] In some embodiments of the present application, Figure 1-12As shown, the movable shearing electrode 1 and the fixed shearing electrode 2 both have a proximal end 22 close to the rotating connection and a distal end 23 away from the rotating connection. When the movable shearing electrode 1 is in the initial position, the proximal end 22 of the movable shearing electrode 1 is flush with the proximal end 22 of the fixed shearing electrode 2; when the movable shearing electrode 1 passes the contact position and continues to move toward the fixed shearing electrode 2, the deformed elastic substrate 11 drives the shearing blade 12 abutting against the shearing blade 21 to move linearly along the shearing blade 21 toward the distal end 23. When conventional scissors are used, the material to be sheared is cut off with a narrow contact surface through the relative movement of the blade bodies on both sides, and the blade bodies on both sides will not bend during the cutting process, so each point on one side of the blade corresponds to the point on the other side of the blade, which makes any point on the blade only apply a squeezing effect perpendicular to the contact surface to the material to be sheared during the shearing process. The difference of the dynamic shearing electrode 1 during use is that the deformed elastic substrate 11 makes the shearing piece 12 not correspond one to one with the points on the shearing blade 21. The shearing piece 12 that first contacts the shearing blade 21 will be pushed toward the distal end 23 of the fixed shearing electrode 2 during the continuous deformation of the elastic substrate 11. This makes the shearing piece 12 not only squeeze and cut the tissue to be sheared, but also apply continuous cutting, so as to break the parts that cannot be separated during the squeezing and cutting process, and have a better shearing effect.

[0020] In some embodiments of the present application, Figure 1-12As shown, the movable shear electrode 1 further includes an insulating portion 13, the insulating portion 13 is provided with a track cavity 131, and the elastic substrate 11 part connected with a plurality of shear blades 12 is arranged in the track cavity 131; a reset member 14 is arranged between the end of the elastic substrate 11 away from the proximal end 22 and the inner wall of the track cavity 131, and the reset member 14 is elastic. When the elastic substrate 11 is deformed, the reset member 14 is squeezed and compressed to store energy, and when the reset member 14 relaxes and releases elastic potential energy, it pushes the elastic substrate 11 to move toward the distal end 23 along the track cavity 131. When the movable shear electrode 1 continues to rotate from the contact position to the shear blade 21, the shear blade 12 pushes the elastic substrate 11 under the pressure of the shear blade 21 and applies a component force pointing to the distal end 23 to the reset member 14. When all the shearing pieces 12 are in contact with the shearing blade 21 or the movable shearing electrode 1 stops rotating, the reset member 14 releases part of the elastic potential energy and pushes the shearing piece 12 to move linearly along the shearing blade 21, which is conducive to improving the cutting frequency of the shearing blade 21 and the shearing piece 12. When the movable shearing electrode 1 is separated from the state where the shearing pieces 12 are in contact with the shearing blade 21 and moves to the initial position, the number of shearing pieces 12 in contact with the shearing blade 21 decreases continuously; in this process, the pressure exerted on the reset member 14 by the elastic substrate 11 that is elastically deformed under the pressure of the shearing pieces 12 and the shearing blade 21 also gradually decreases, and the reset member 14 completely releases the elastic potential energy and makes the proximal end 22 of the movable shearing electrode 1 in the initial position flush with the proximal end 22 of the fixed shearing electrode 2.

[0021] In some embodiments of the present application, Figure 1-12 As shown, the fixed shearing electrode 2 further includes an insulating portion 24, and the insulating portion 24 is coaxially connected to the insulating portion 1 13; when the insulating portion 1 13 and the insulating portion 2 24 move relative to each other, the elastic substrate 11 is driven to move toward the shearing blade 21. By providing the insulating portion, only the shearing blade 21, the shearing piece 12 and the elastic substrate 11 are charged during the electrocoagulation operation, thereby reducing the risk of electric shock, and preventing the insulating portion 1 13 and the insulating portion 2 24, which are relatively wide, from adhering to the patient's wound under the action of electricity and high temperature.

[0022] In some embodiments of the present application, Figure 1-12 As shown, it also includes a connecting shaft 3, and the insulating part 1 13 and the insulating part 2 24 are respectively provided with shaft holes, and the connecting shaft 3 is sleeved in the shaft holes of the insulating part 13 and the insulating part 2 24, so that the insulating part 13 and the insulating part 2 24 are coaxially connected.

[0023] In some embodiments of the present application, Figure 1-12As shown, the end of the insulating part 13 facing away from the shear blade 21 and the end of the insulating part 24 facing away from the elastic substrate 11 are both provided with handles 4, the two handles 4 are arranged opposite to each other, and the outer walls of the two handles 4 facing each other are provided with reset members 2 41. When the handles 4 are not subjected to external force, they are stretched open by the reset members 2 41, and the movable shear electrode 1 is maintained in the initial position. When the fixed shear electrode 2 is separated from the initial position, the reset member 2 41 undergoes elastic deformation. When the user holds the handle 4 tightly, the movable shear electrode 1 and the fixed shear electrode 2 move toward each other. When the user reduces the gripping pressure on the handle 4, the handles 4 move away from each other under the action of the reset member 2 41, and the movable shear electrode 1 connected to the handle 4 moves toward the initial position.

[0024] In some embodiments of the present application, Figure 1-12 As shown, the shearing piece 12 has a friction surface 121, and the shearing blade 21 has a friction surface 211. When the shearing blade 21 abuts against the shearing piece 12, the friction surface 121 and the friction surface 211 overlap. The friction surface 211 is provided with a limiting groove 212, and the limiting groove 212 is parallel to the shearing blade 21. When the shearing blade 21 abuts against the shearing piece 12 one by one, the shearing piece 12 has a tendency to move along the friction surface 211 toward the back of the shearing blade 21, and the limiting groove 212 can limit the maximum distance that each shearing piece 12 moves toward the shearing blade 21 on the friction surface 211, thereby preventing the distal end 23 of the moving shearing electrode 1 from eventually passing over the fixed shearing electrode 2, and further preventing the shearing piece 12 and the shearing blade 21 from damaging the surrounding tissues in the patient's skull.

[0025] In some embodiments of the present application, Figure 1-12 As shown, at least two lead wires 5 are also included, one end of one lead wire 5 is connected to the shear blade 21, and the other end of this lead wire 5 passes through the insulating part 24 and passes through one of the handles 4; one end of another lead wire 5 is connected to the elastic substrate 11, and the other end of this lead wire 5 passes through the insulating part 13 and passes through the other handle 4; the two lead wires 5 extend from the ends of the two handles 4 away from the shear blade 21, respectively, and any two lead wires 5 do not contact each other. The part of the lead wire 5 extending from the end of the handle 4 away from the shear blade 21 is connected to a device capable of providing energy, so that the shear blade 21 and the shear piece 12 can be energized when the movable shear electrode 1 moves to the contact position, so that the movable shear electrode 1 and the fixed shear electrode 2 have an electrocoagulation effect.

[0026] In some embodiments of the present application, Figure 1-12As shown, when the movable shearing electrode 1 is in the initial position, the shearing piece 12 of the movable shearing electrode 1 is opposite to the shearing blade 21 of the fixed shearing electrode 2, and a shearing area is formed between the shearing piece 12 and the shearing blade 21. The area of ​​the shearing area reaches the maximum value when the movable shearing electrode 1 is in the initial position. In cranial and brain surgery, there is a situation where the surgical space is narrow and the target to be sheared is narrow and long. When the movable shearing electrode 1 is in the initial position and is parallel to the fixed shearing electrode 2, the electrocoagulation scissors are extended into the surgical space to place the narrow and long tissue to be sheared into the shearing area, and when the electrodes on both sides are closed and turned on, the proximal ends 22 of the electrodes on both sides abut against each other and gradually close from the proximal end 22 to the distal end 23. The electrocoagulation scissors with such a shearing area have two advantages in this case: first, there is no need to significantly change the distance between the proximal ends 22 of the two electrodes when opening and closing like traditional scissors, which can efficiently utilize the narrow surgical space; second, when the movable shearing electrode 1 and the fixed shearing electrode 2 are closed, the space they occupy is further reduced, so it can allow the user to insert medical instruments for observation into the wound to improve the surgical accuracy.

[0027] In some embodiments of the present application, Figure 1-12 As shown, the insulating part 24 is provided with a limiting boss 1 241 and a limiting boss 2 242. When the movable shearing electrode 1 moves to the initial position, the outer wall of the insulating part 13 abuts against the limiting boss 1 241. When all the shearing pieces 12 are in contact with the shearing blade 21, the outer wall of the insulating part 13 abuts against the limiting boss 2 242. The limiting boss 1 241 and the limiting boss 2 242 limit the rotation stroke of the fixed shearing electrode 2, thereby preventing the fixed shearing electrode 2 from breaking through the motion limit of the limiting groove 212 when rotating, which is beneficial to improving the safety of tissue electrocoagulation shearing.

Claims

1. An electrocoagulation shear, characterized in that: include, A dynamic shearing electrode, comprising an elastic substrate and shearing pieces connected to each other, wherein a plurality of the shearing pieces are linearly arrayed and distributed on the outer wall of the elastic substrate; A fixed shearing electrode is rotatably connected with the movable shearing electrode around the same axis, and the movable shearing electrode can move to an initial position and be parallel to the fixed shearing electrode; The fixed shearing electrode includes a shearing blade, and the movable shearing electrode can move toward the fixed shearing electrode to a contact position, and the outer wall of the shearing blade abuts against one of the shearing pieces when the movable shearing electrode is in the contact position; when the movable shearing electrode in the contact position rotates toward the fixed shearing electrode, the elastic substrate generates elastic deformation and pushes the shearing pieces to abut against the shearing blade in turn.

2. The electrocoagulation shears according to claim 1, characterized in that: The movable shearing electrode and the fixed shearing electrode both have a proximal end close to the rotating connection and a distal end away from the rotating connection, and when the movable shearing electrode is in an initial position, the proximal end of the movable shearing electrode is flush with the proximal end of the fixed shearing electrode; When the movable shearing electrode passes the contact position and continues to move toward the fixed shearing electrode, the deformed elastic substrate drives the shearing piece in contact with the shearing blade to move linearly toward the distal end along the shearing blade.

3. The electrocoagulation shears according to claim 1, characterized in that: The dynamic shear electrode also includes an insulating part 1, which is provided with a track cavity, and an elastic substrate part connected with a plurality of shear pieces is arranged in the track cavity; a reset member 1 is arranged between the end of the elastic substrate away from the proximal end and the inner wall of the track cavity, and the reset member 1 is elastic. When the elastic substrate is deformed, the reset member 1 is squeezed and compressed to store energy. When the reset member 1 relaxes and releases the elastic potential energy, it pushes the elastic substrate to move toward the distal end along the track cavity.

4. The electrocoagulation shears according to claim 3, characterized in that: The fixed shearing electrode further comprises an insulating part 2, wherein the insulating part 2 is coaxially connected to the insulating part for rotation; when the insulating part 1 and the insulating part 2 move relative to each other, the elastic substrate is driven to move toward the shearing blade.

5. The electrocoagulation shears according to claim 4, characterized in that: It also includes a connecting shaft. The insulating part 1 and the insulating part 2 are respectively provided with shaft holes. The connecting shaft is sleeved in the shaft holes of the insulating part 1 and the insulating part 2, so that the insulating part 1 and the insulating part 2 are coaxially connected for rotation.

6. The electrocoagulation shears according to claim 4, characterized in that: The end of the insulating part 1 facing away from the shearing blade and the end of the insulating part 2 facing away from the elastic substrate are both provided with handles, and the two handles are arranged opposite to each other. The two outer walls opposite to each other of the two handles are provided with reset components 2. When the handles are not subjected to external force, they are stretched open by the reset components 2 and the movable shearing electrode is maintained in the initial position. When the fixed shearing electrode is separated from the initial position, the reset component 2 undergoes elastic deformation.

7. The electrocoagulation shears according to claim 1, characterized in that: The shearing piece has a friction surface 1, and the shearing blade has a friction surface 2. When the shearing blade abuts against the shearing piece, the friction surface 1 and the friction surface 2 overlap. A limiting groove is provided on the friction surface 2, and the limiting groove is parallel to the shearing blade.

8. The electrocoagulation shears according to claim 6, characterized in that: It also includes at least two lead wires, one end of which is connected to the shearing blade, and the other end of the lead wire passes through the insulating part 2 and penetrates one of the handles; one end of another lead wire is connected to the elastic substrate, and the other end of the lead wire passes through the insulating part 1 and penetrates the other handle; the two lead wires extend from the ends of the two handles away from the shearing blade respectively, and any two lead wires do not touch each other.

9. The electrocoagulation shears according to claim 1, characterized in that: When the movable shearing electrode is in the initial position, the shearing piece of the movable shearing electrode is opposite to the shearing edge of the fixed shearing electrode, and a shearing area is formed between the shearing piece and the shearing edge. The area of ​​the shearing area reaches a maximum value when the movable shearing electrode is in the initial position.

10. The electrocoagulation shears according to claim 4, characterized in that: The insulating part 2 is provided with a limiting boss 1 and a limiting boss 2. When the movable shear electrode moves to the initial position, the outer wall of the insulating part 1 abuts against the limiting boss 1. When all the shear pieces are in contact with the shear blade, the outer wall of the insulating part 1 abuts against the limiting boss 2.

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