An electric coagulation shears

Abstract

The present invention discloses an electrocoagulation shear, which belongs to the field of medical devices and includes: a movable shearing electrode, which includes an elastic substrate and shearing pieces connected to each other, and a plurality of shearing pieces are linearly arrayed and distributed on the outer wall of the elastic substrate; a fixed shearing electrode, which 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 blades in turn. Through the above-mentioned configuration, the present invention can efficiently shear target tissue in a narrow wound on the head.

Description

Technical Field

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

[0002] Intracranial tumors are a leading cause of death or disability, and most require craniotomy for resection. Tumor cutting instruments are crucial for resection, especially for tough tumors, such as meningiomas, the most common primary intracranial tumor. Advanced cutting instruments can significantly improve surgical efficiency and shorten operative time. Tumors typically have a vascular supply, so we first use a bipolar electrosurgical unit to coagulate the tumor tissue to achieve hemostasis and carbonize it. This carbonization softens the tissue, making it easier to cut. Microscissors are then used to perform the cutting operation. This process requires constant switching between the bipolar electrosurgical unit and microscissors, which is cumbersome, time-consuming, and increases the risk of collateral damage from the instruments entering and exiting the cranial cavity. Electroscissors combine the functions of these two instruments, improving tumor cutting efficiency, shortening operative time, and minimizing collateral damage to brain tissue.

[0003] However, the brain is densely populated with nerves and blood vessels, so the wounds created during intracranial shearing operations are often small in diameter and deep. Current shearing tools used for intracranial tissue shearing primarily rely on the lever principle to apply pressure to the tissue being sheared. A larger power arm drives the scissor head, which acts as a resistance arm, to squeeze and shear the tumor tissue. This results in a shorter scissor head and lower shearing efficiency. However, using a longer scissor head to perform shearing operations inside the patient's skull can easily injure surrounding tissue within 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 electric coagulation 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:

[0006] 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 to 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.

[0007] 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.

[0008] Furthermore, the dynamic shearing electrode also includes an insulating portion 1, which is provided with a track cavity, and an elastic substrate portion connected to a plurality of shearing pieces is provided in the track cavity; a reset member 1 is provided between the end of the elastic substrate facing 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, it squeezes the reset member 1 and compresses the reset member 1 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. When the dynamic shearing electrode continues to rotate from the contact position toward the shearing blade, the shearing piece pushes the elastic substrate under the pressure of the shearing blade and applies a component force directed toward the distal end to the reset member 1. When all the shearing pieces are in contact with the shearing blade or the dynamic shearing electrode stops rotating, the reset member 1 releases part of the elastic potential energy and pushes the shearing piece to move linearly along the shearing blade, which is conducive to improving the cutting frequency of the shearing blade and the shearing piece.

[0009] Furthermore, the fixed shearing electrode includes a second insulating portion, which is coaxially connected to the insulating portion for rotation. When the first and second insulating portions move relative to each other, the elastic substrate moves toward the shearing blade. By providing the insulating portion, only the shearing blade, shearing blade, and elastic substrate are electrically charged during electrocoagulation, thereby reducing the risk of electric shock. Furthermore, the wider first and second insulating portions are prevented from adhering to the patient's wound when exposed to electricity and high temperatures.

[0010] Furthermore, it also includes a connecting shaft, and 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.

[0011] 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 outer walls opposite to each other of the two handles are provided with a reset member 2. When the handles are not subjected to external force, they are stretched open by the reset member 2 and the movable shearing electrode is maintained in the initial position. When the fixed shearing electrode leaves the initial position, the reset member 2 undergoes elastic deformation.

[0012] Furthermore, the shearing piece has a first friction surface, and the shearing blade has a second friction surface. When the shearing blade abuts the shearing piece, the first friction surface and the second friction surface overlap. The second friction surface is provided with a limiting groove, and the limiting groove is parallel to the shearing blade. When the shearing blades abut the shearing pieces one by one, the shearing pieces tend to move along the second friction surface toward the back of the shearing blade. The limiting groove can limit the maximum distance that each shearing piece can move on the second friction surface toward the shearing blade.

[0013] Furthermore, the device includes at least two lead wires, one end of which is connected to the shear blade, and the other end of which passes through the insulating portion 2 and through one of the handles; one end of the other lead wire is connected to the elastic base, and the other end of which passes through the insulating portion 1 and through the other handle; the two lead wires extend from the ends of the two handles facing away from the shear blades, respectively, and no two lead wires touch each other. The portion of the lead wire extending from the end of the handle away from the shear blades is connected to a device capable of providing energy, so that the shear blade and the shear plate can be energized when the movable shear electrode moves to a contact position, thereby achieving an electrocoagulation effect on the movable shear electrode and the fixed shear electrode.

[0014] 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 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.

[0015] Furthermore, the second insulating portion is provided with a first limiting boss and a second limiting boss. When the movable shearing electrode moves to its initial position, the outer wall of the first insulating portion abuts the first limiting boss. When all the shearing blades are in contact with the shearing blade, the outer wall of the first insulating portion abuts the second limiting boss. The first limiting boss and the second limiting boss limit the rotational travel of the fixed shearing electrode, thereby preventing the fixed shearing electrode from breaking through the motion limit of the limiting groove during rotation, which is beneficial to improving the safety of tissue coagulation and shearing.

[0016] Beneficial effects of the present invention:

[0017] By setting a dynamic shearing electrode and a 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 cut, and when the electrodes on both sides are energized when in contact, the pressure required for shearing the target tissue can be reduced by carbonizing it first and then breaking it, and the wound can be stopped from bleeding at the same time; by setting an elastic substrate and a shearing piece, the deformed elastic substrate makes the shearing piece and the points on the shearing blade not correspond one to one, and the shearing piece that first contacts the shearing blade will be pushed toward the far end of the fixed shearing electrode in 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 cut, 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

[0018] 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. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0019] Figure 1 A schematic diagram of an assembly structure of the present invention when the movable shear electrode is in an initial position;

[0020] Figure 2 for Figure 1 A schematic diagram of a local structure at A in the middle;

[0021] Figure 3 for Figure 2 A schematic diagram of a local structure at B in the middle;

[0022] Figure 4 for Figure 3 A schematic diagram of a cross-sectional structure;

[0023] Figure 5 for Figure 2 A schematic diagram of a local structure at C in the middle;

[0024] Figure 6 for Figure 5 A schematic diagram of a local structure at D in the middle;

[0025] Figure 7 A schematic diagram of a partial structure of the present invention when the movable shear electrode is in the contact position;

[0026] Figure 8 This is a schematic diagram of an assembly structure of the present invention when part of the shearing piece is in contact with the shearing blade and no lead wire is assembled;

[0027] Figure 9 for Figure 8 A schematic diagram of a local structure at E in the middle;

[0028] Figure 10 for Figure 9 A schematic diagram of a local structure at F in the middle;

[0029] Figure 11 for Figure 9 A schematic diagram of a local structure at G in the middle;

[0030] Figure 12 for Figure 9 Another local structure diagram at G in the middle;

[0031] 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; 23. proximal end; 22. 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

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention 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 content 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 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.

[0033] An electric coagulation shears, such as Figure 1-12As shown, it includes: a movable shearing electrode 1, which includes an elastic substrate 11 and shearing pieces 12 connected to each other, with a plurality of shearing pieces 12 distributed in a linear array on the outer wall of the elastic substrate 11; a fixed shearing electrode 2, which is rotatably connected to 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 undergoes elastic deformation and pushes the shearing pieces 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 only shortens. When conventional scissors are shearing, the two opposing blades near the proximal end 23 of the rotating shaft first begin to contact and cut the material between the blades by squeezing. Under this shearing method, the distance between the distal ends 22 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 surgical 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 intracranial wound, the scheme of the movable shearing electrode 1 and the fixed shearing electrode 2 can be closed from the distal end 22 to the proximal end 23 in the narrow treatment space, and thus can ensure that the opening and closing amplitude remains unchanged when the blade length changes, so that the tissue can be flexibly sheared inside narrow wounds of various depths.

[0034] 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 23 close to the rotating connection and a distal end 22 away from the rotating connection. When the movable shearing electrode 1 is in the initial position, the proximal end 23 of the movable shearing electrode 1 is flush with the proximal end 23 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 in contact with the shearing blade 21 to move linearly along the shearing blade 21 toward the distal end 22. When in use, conventional scissors separate the material to be sheared with a narrow contact surface through the relative movement of the two blades. The blades on both sides do not bend during the cutting process. Therefore, each point on one side of the blade corresponds one-to-one to a point on the other side of the blade. This ensures that any point on the blade only applies a squeezing effect perpendicular to the contact surface to the material to be sheared during the cutting 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 22 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 that it can break the part that cannot be separated during the extrusion and cutting process, and has a better shearing effect.

[0035] In some embodiments of the present application, Figure 1-12As shown, the movable shear electrode 1 further includes an insulating portion 13, which is provided with a track cavity 131. The portion of the elastic substrate 11 connected to a plurality of shear blades 12 is disposed within the track cavity 131. A reset member 14 is disposed between the end of the elastic substrate 11 facing away from the proximal end 23 and the inner wall of the track cavity 131. The reset member 14 is elastic. When the elastic substrate 11 deforms, it squeezes the reset member 14 and compresses it to store energy. When the reset member 14 relaxes and releases its elastic potential energy, it pushes the elastic substrate 11 along the track cavity 131 toward the distal end 22. When the movable shear electrode 1 continues to rotate from the contact position toward the shear blade 21, the shear blades 12, under the pressure of the shear blade 21, push the elastic substrate 11 and apply a component of force directed toward the distal end 22 to the reset member 14. When all the shearing pieces 12 are in contact with the shearing blades 21 or the movable shearing electrode 1 stops rotating, the reset member 14 releases some of its elastic potential energy and pushes the shearing piece 12 to move linearly along the shearing blades 21, which helps to increase the cutting frequency of the shearing blades 21 and the shearing piece 12. When the movable shearing electrode 1 disengages from the state where all the shearing pieces 12 are in contact with the shearing blades 21 and moves to the initial position, the number of shearing pieces 12 in contact with the shearing blades 21 continuously decreases. During this process, the pressure exerted on the reset member 14 by the elastic substrate 11, which is elastically deformed under the pressure of the shearing pieces 12 and the shearing blades 21, gradually decreases. The reset member 14 completely releases its elastic potential energy and makes the proximal end 23 of the movable shearing electrode 1 in the initial position flush with the proximal end 23 of the fixed shearing electrode 2.

[0036] In some embodiments of the present application, Figure 1-12 As shown, the fixed shearing electrode 2 further includes a second insulating portion 24, which is coaxially rotatably connected to the first insulating portion 13. When the first insulating portion 13 and the second insulating portion 24 move relative to each other, they drive the elastic substrate 11 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 electrically charged during electrocoagulation, thereby reducing the risk of electric shock. This also prevents the wider first insulating portion 13 and the second insulating portion 24 from adhering to the patient's wound when subjected to electricity and high temperatures.

[0037] In some embodiments of the present application, Figure 1-12 As shown, it also includes a connecting shaft 3, and the insulating part 13 and the insulating part 2 24 are respectively provided with an axial hole, and the connecting shaft 3 is sleeved in the axial 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.

[0038] In some embodiments of the present application, Figure 1-12As shown, the end of the insulating portion 13 facing away from the shear blade 21 and the end of the insulating portion 24 facing away from the elastic substrate 11 are both provided with handles 4. The two handles 4 are arranged opposite 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 forces, they are stretched open by the reset members 2 41, and the movable shear electrode 1 is maintained in its initial position. When the fixed shear electrode 2 is displaced from its initial position, the reset member 2 41 undergoes elastic deformation. When the user grips the handles 4 tightly, the movable shear electrode 1 and the fixed shear electrode 2 move toward each other. When the user reduces the grip pressure on the handles 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 handles 4 moves toward its initial position.

[0039] In some embodiments of the present application, Figure 1-12 As shown, the shearing piece 12 has a friction surface 121, and the shearing edge 21 has a friction surface 211. When the shearing edge 21 abuts 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 edge 21. When the shearing edges 21 abut the shearing pieces 12 one by one, the shearing pieces 12 have a tendency to move along the friction surface 211 toward the back of the shearing edge 21. The limiting groove 212 can limit the maximum distance that each shearing piece 12 can move toward the shearing edge 21 on the friction surface 211, thereby preventing the distal end 22 of the movable shearing electrode 1 from eventually passing over the fixed shearing electrode 2, and further preventing the shearing piece 12 and the shearing edge 21 from damaging the surrounding tissues in the patient's skull.

[0040] In some embodiments of the present application, Figure 1-12 As shown, it also includes at least two lead wires 5, one end of which is connected to the shearing blade 21, and the other end of this lead wire 5 passes through the insulating portion 2 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 portion 1 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 shearing blade 21, respectively, and no two lead wires 5 touch each other. The portion of the lead wire 5 extending from the end of the handle 4 away from the shearing blade 21 is connected to a device capable of providing energy, so that the shearing blade 21 and the shear piece 12 can be energized when the movable shear electrode 1 moves to the contact position, thereby causing the movable shear electrode 1 and the fixed shear electrode 2 to have an electrocoagulation effect.

[0041] In some embodiments of the present application, Figure 1-12As shown, when the movable shearing electrode 1 is in its initial position, the shearing blade 12 of the movable shearing electrode 1 opposes the shearing edge 21 of the fixed shearing electrode 2, forming a shearing zone between the shearing blade 12 and the shearing edge 21. The area of the shearing zone reaches its maximum when the movable shearing electrode 1 is in its initial position. During cranial surgery, the surgical space is often narrow and the target to be sheared is long and narrow. When the movable shearing electrode 1 is in its initial position and parallel to the fixed shearing electrode 2, extending the electrocoagulation scissors into the surgical space can place the long and narrow tissue to be sheared into the shearing zone. When the electrodes are closed and conducting, the proximal ends 23 of the electrodes abut against each other and gradually close from the proximal ends 23 to the distal ends 22. Electrocoagulation scissors with this shearing zone have two advantages in this situation: first, unlike traditional scissors, the distance between the proximal ends 23 of the two electrodes does not need to be significantly changed when opening and closing, which allows for efficient utilization of the narrow surgical space. Second, when the movable shearing electrode 1 and the fixed shearing electrode 2 are closed, the space occupied by them is further reduced, allowing the user to insert medical instruments for observation into the wound, thereby improving surgical precision.

[0042] In some embodiments of the present application, Figure 1-12 As shown, the second insulating portion 24 is provided with a first limiting boss 241 and a second limiting boss 242. When the movable shearing electrode 1 moves to its initial position, the outer wall of the first insulating portion 13 abuts the first limiting boss 241. When all the shearing blades 12 are in contact with the shearing blade 21, the outer wall of the first insulating portion 13 abuts the second limiting boss 242. The first limiting boss 241 and the second limiting boss 242 limit the rotational travel of the fixed shearing electrode 2, thereby preventing the fixed shearing electrode 2 from breaking through the motion limit of the limiting groove 212 during rotation, which helps to improve the safety during tissue electrocoagulation and shearing.

Claims

1. An electric coagulation shear, characterized in that: include, A dynamic shearing electrode comprising an elastic substrate and shearing pieces connected to each other, wherein a plurality of shearing pieces are linearly arrayed on an outer wall of the elastic substrate; a fixed shearing electrode, rotatably connected to the movable shearing electrode around the same axis, wherein 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 electric coagulation 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 rotation connection and a distal end away from the rotation 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 electric coagulation shears according to claim 2, 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 to a plurality of shear pieces is arranged in the track cavity; a reset member 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 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 elastic potential energy, it pushes the elastic substrate to move toward the distal end along the track cavity.

4. The electric coagulation shears according to claim 3, characterized in that: The fixed shearing electrode further comprises a second insulating portion, which is coaxially connected to the insulating portion for rotation. When the first insulating portion and the second insulating portion move relative to each other, the elastic substrate is driven to move toward the shearing edge.

5. The electric coagulation 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 an axial hole. 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.

6. The electric coagulation 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 outer walls opposite to each other of the two handles are provided with a reset member 2. When the handles are not subject to external force, they are supported by the reset member 2 and the movable shearing electrode is maintained in the initial position. When the fixed shearing electrode leaves the initial position, the reset member 2 undergoes elastic deformation.

7. The electric coagulation 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 electric coagulation 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 this 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 this 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 electric coagulation 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 electric coagulation 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 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.

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