Electrosurgical instrument and electrosurgical system

Abstract

The utility model discloses an electrosurgical instrument and an electrosurgical system, and belongs to the field of medical instruments. The electrosurgical instrument comprises: an end effector assembly comprising a clamping member forming a jaw structure; the handle assembly operably provides driving force and electrosurgical energy for the end executing assembly, the handle assembly comprises a holding main body and a rotary conductive structure installed in the holding main body, the rotary conductive structure comprises a stator and a rotor, the stator is provided with a first conductive part electrically connected with the power supply connecting part, and the rotor is provided with a second conductive part electrically connected with the power supply connecting part; the rotor is provided with a second conductive part electrically connected with the clamping component, and when the rotor operably rotates relative to the stator, the first conductive part is electrically connected with the second conductive part. According to the utility model, the clamping component can reliably rotate by 360 degrees.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to an electrosurgical instrument and an electrosurgical system. Background Art

[0002] A bipolar electrosurgical unit is a high-frequency, bipolar unit. It uses a high-frequency, high-voltage current flowing between the two electrodes of the surgical instrument, causing dehydration and shrinkage of blood vessel walls, coagulation of blood within the vessels, and fusion of the vessel and clot, thereby achieving tissue separation and coagulation, effectively cutting and sealing tissue. Bipolar electrosurgical units are widely used in various delicate surgical procedures, such as neurosurgery, vascular surgery, microsurgery, and plastic surgery, due to their minimal thermal damage and controllable cutting speed and coagulation depth.

[0003] The handle assembly of a bipolar electrosurgical unit is typically connected to a main unit that outputs high-frequency electrosurgical energy. The end effector assembly includes a clamping member for gripping the tissue to be cut. The two clamps forming the jaw structure are electrically connected to the positive and negative terminals of the main unit via wires arranged sequentially on the handle assembly, the elongated body assembly, and the two clamps. During laparoscopic surgery, due to space constraints, surgeons often rotate the jaws of the clamping member to perform operations such as grasping and dragging tissue. To facilitate this operation, the clamping member needs to be able to rotate 360 ​​degrees, and the wires electrically connected to the clamping member need to be able to rotate 360 ​​degrees within the handle assembly. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to provide an electrosurgical instrument capable of achieving 360-degree rotation of the clamping member.

[0005] In view of the above technical problems, the present invention provides the following technical solutions:

[0006] An electrosurgical instrument comprises: an end execution assembly, including a clamping member forming a jaw structure; a handle assembly, operable to provide driving force and electrosurgical energy to the end execution assembly, the handle assembly comprising a gripping body, and a rotating conductive structure installed in the gripping body, comprising: a stator and a rotor, the stator being provided with a first conductive portion electrically connected to a power supply connection portion, the rotor being provided with a second conductive portion electrically connected to the clamping member, and when the rotor is operable to rotate relative to the stator, the first conductive portion and the second conductive portion remain electrically connected.

[0007] In some embodiments of the present invention, at least one of the first conductive portion and the second conductive portion is an annular conductive portion.

[0008] In some embodiments of the present invention, the first conductive portion and the second conductive portion are respectively provided on the side surfaces of the stator and the rotor that are opposite to each other in the circumferential direction or the axial direction.

[0009] In some embodiments of the present invention, the rotor is constructed as a T-shaped shaft having a large diameter portion and a small diameter portion, the small diameter portion of the T-shaped shaft is rotatably connected to the stator, and a second conductive portion is provided on the transition surface between the large diameter portion and the small diameter portion of the T-shaped shaft.

[0010] In some embodiments of the present invention, the stator is constructed as a sleeve structure, which includes a first hole area for rotationally cooperating with the small diameter part of the rotor, and a second hole area for accommodating the large diameter part of the rotor, and the first conductive part is provided on the transition surface extending radially between the first hole area and the second hole area.

[0011] In some embodiments of the present invention, one of the first conductive portion and the second conductive portion is constructed as two radially arranged conductive protrusions, and the other of the first conductive portion and the second conductive portion is constructed as two concentrically arranged conductive slip rings.

[0012] In some embodiments of the present invention, the first conductive part is two conductive protrusions, and the two conductive protrusions are respectively connected to the positive terminal and the negative terminal of the power supply connection part through wires; the second conductive part is two conductive slip rings, and the two conductive slip rings are respectively electrically connected to two cables extending from the clamping member to the handle assembly side.

[0013] In some embodiments of the present invention, the rotating conductive structure also includes a fixed block that rotates synchronously with the rotor, the fixed block is connected to the rotor through an anti-rotation shaft, and the fixed block has two conductive connection ends spaced apart on a side surface facing the rotor, and the two conductive connection ends are respectively electrically connected to two cables extending from the clamping member to the handle assembly side and the second conductive part on the rotor.

[0014] In some implementations of the present invention, the anti-rotation shaft is located at the center of the fixing block and the rotor, and the conductive connecting ends are symmetrically arranged on both sides of the anti-rotation shaft.

[0015] In some embodiments of the present invention, the fixing block is located at the proximal end of the rotor, and the rotor is provided with a through hole extending axially. Two cables extending from the clamping member to the handle assembly side pass through the through hole of the rotor and are electrically connected to the conductive connection end provided at the distal end of the fixing block.

[0016] In some embodiments of the present invention, the connecting cable between the conductive connection end of the fixed block and the second conductive part of the rotor includes a first part located between the fixed block and the rotor and a second part embedded in the rotor, wherein the two ends of the first part are rigidly connected to the fixed block and the rotor.

[0017] In some embodiments of the present invention, the holding body is provided with an installation cavity for accommodating a rotating conductive structure, the stator is embedded in the installation cavity, a limiting protrusion is provided on the outer side of the stator, and a corresponding limiting slot is provided on the holding body, and the limiting protrusion cooperates with the limiting slot to limit the stator to the holding body.

[0018] In some embodiments of the present invention, a slender body assembly is further included that is connected to the distal end of the handle assembly via a turn knob, the slender body assembly defines a longitudinal axis, and the turn knob can rotate around the longitudinal axis relative to the grip body, thereby driving the slender body assembly and the end execution assembly to rotate synchronously.

[0019] The utility model also provides an electrosurgery system, comprising a control host and the electrosurgery instrument, wherein the electrosurgery instrument is electrically connected to the output end of the control host via a power supply connection portion.

[0020] The technical solution of the utility model has the following technical effects compared with the existing technology:

[0021] In the electrosurgical instrument provided by the present invention, a rotating conductive structure is provided on the handle assembly side, including a stator and a rotor, and a conductive part is provided between the stator and the rotor. When the rotor is operably rotated relative to the stator, the conductive part between the two remains electrically connected. When the end actuator of the surgical instrument is controlled to rotate, the conductive structure for transmitting high-frequency electrosurgical energy can be electrically connected in a 360-degree rotatable manner, and the working reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the objects and advantages of the present invention.

[0023] Figure 1 This is a schematic structural diagram of a specific embodiment of the electrosurgery system of the present invention;

[0024] Figure 2 This is a structural diagram of a specific embodiment of the electrosurgical instrument of the present invention;

[0025] Figure 3 This is a partial structural diagram of the handle assembly side of the electrosurgical instrument of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the rotor in the electrosurgical instrument of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the stator in the electrosurgical instrument of the present invention;

[0028] Figure 6 This is a partial structural diagram of the handle assembly side of the electrosurgical instrument of the present invention;

[0029] Figure 7 for Figure 6 Enlarged view of part A;

[0030] Figure 8 This is a schematic structural diagram of the rotating conductive structure in the electrosurgical instrument of the present invention;

[0031] Figure 9 It is a cross-sectional view of the stator and rotor in the rotating conductive structure of the electrosurgical instrument of the present invention;

[0032] Figure 10 A three-dimensional diagram of the stator and rotor in the rotating conductive structure of the electrosurgical instrument of the present invention;

[0033] Figure 11 Schematic diagram of the fixed block and anti-rotation shaft in the rotating conductive structure of the electrosurgical instrument of the present invention. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] In various embodiments of the present invention, the “distal end / side” refers to the end of the surgical instrument that is away from the operator when the surgical instrument is operated, and the “proximal end / side” refers to the end / side that is close to the operator when the surgical instrument is operated.

[0039] The present application generally relates to a medical device, and more particularly to an electrosurgical instrument, sometimes also referred to as a bipolar electrosurgical unit, that can be used to cut tissue, coagulate (cauterize and seal) tissue, and / or clamp tissue during surgical procedures, whether in open, laparoscopic, or endoscopic surgery. The electrosurgical instrument is operable to transmit electrosurgical energy to an end effector assembly 30 to act on tissue to coagulate (cauterize and seal) tissue. Furthermore, the electrosurgical instrument described herein can also be used to clamp and manipulate tissue when electrosurgical energy is not being supplied to the end effector assembly 30.

[0040] like Figure 1 As shown, the electrosurgical instrument 100 provided by the present invention is generally adapted to a control host 40 that outputs electrosurgical energy to form an electrosurgical system. It is understandable that the same electrosurgical instrument 100 can be used in conjunction with a variety of different control hosts 40 through external cables. The electrosurgical instrument 100 includes a handle assembly 10, a slender body assembly 20, and an end effector assembly 30 that are sequentially connected from the proximal end to the distal end. The proximal end of the handle assembly 10 is provided with a power supply connection portion 15 for electrically connecting to the control host 40. For example, in Figure 2 In the embodiment shown, the power connection portion 15 is configured as an electric slip ring to provide a reliable electrical connection when the actuator rotates. As an alternative embodiment, the power connection portion 15 can also be configured as a socket or plug to connect to the output terminal or output connector of the control host 40.

[0041] The end effector assembly 30 is used to operate tissue to perform specific surgical operations, for example, clamping, coagulation, cutting and other surgical operations on tissue. Figure 2As shown, the end effector assembly 30 includes a clamping member, which is constructed as a first clamp 31 and a second clamp 32 that are pivotally connected. The first clamp 31 and the second clamp 32 pivot toward each other to clamp the tissue, and the first clamp 31 and the second clamp 32 pivot away from each other to release the tissue. Alternatively, in an alternative embodiment, the first clamp 31 of the end effector assembly 30 can be operated to pivot toward the second clamp 32 until the jaws of the end effector assembly 30 are closed to clamp the tissue; the first clamp 31 pivots away from the second clamp 32 until the jaws of the end effector assembly 30 are opened to release the tissue, and vice versa. Furthermore, both the first clamp 31 and the second clamp 32 include electrode pads that contact the tissue to transmit electrosurgical energy to the tissue to achieve an electrocoagulation operation.

[0042] Further Figure 1-3 As shown, the handle assembly 10 is operable to provide driving force to the end effector assembly 30, such as closing driving force and cutting driving force. Figure 1 As shown, the handle assembly 10 includes a grip body 11 that can be gripped by a user and a closing trigger 12 pivotally connected to the grip body 11. The user operates the closing trigger 12 to operate the end effector assembly 30 to perform a closing or opening action. In a specific embodiment, the grip body 11 includes a first half shell and a second half shell, and the first half shell and the second half shell can be detachably connected by a snap connection, a fastener connection, etc. Figure 2 As shown, the gripping body 11 is generally T-shaped as a whole, including a main body portion 11a extending along the longitudinal axis C and a gripping portion 11b extending approximately perpendicular to the longitudinal axis or inclined at a certain angle relative to the longitudinal axis. The main body portion 11a and the gripping portion 11b form an accommodating space inside to accommodate a driving mechanism, etc.

[0043] The elongated body assembly 20 includes a plurality of transmission components that operably couple the end effector assembly 30 to a plurality of actuators housed by the handle assembly 10. The elongated body assembly 20 includes an outer sleeve 201 that defines the outer surface of the elongated body and accommodates movement of other components therethrough. Figure 4 As shown, outer sleeve 201 is configured to move longitudinally relative to an inner actuation member that is axially received within outer sleeve 201. The inner actuation member may be a rod, shaft, stamped metal, or other suitable metal component.

[0044] Reference Figure 2As shown, the closure trigger 12 is operably mounted on the proximal portion of the elongated body assembly 20 via a connecting portion 123. Specifically, the connecting portion 123 is formed at the upper end of the closure trigger 12 and connected to the proximal portion of the outer sleeve 201. The connecting portion 123 is pivotally mounted within the housing of the grip body 11 via a pivot 120. Specifically, the connecting portion 123 extends upward around opposite sides of a drive collar 124 disposed on the outer sleeve 201 and includes arcuate proximal and distal drive surfaces thereon. The proximal drive surface engages the distal-facing surface of a spring washer of the drive collar 124. A retaining ring 125 is also mounted on the outer sleeve 201 and moves with the longitudinal movement of the outer sleeve 201. The distal drive surface engages the proximal-facing surface of the retaining ring 125. The closing trigger 12 extends from one side of the connecting portion 123 to a side opposite to the holding portion 11b of the holding body 11. The holding portion 11b of the holding body 11 has an opening on a side opposite to the closing trigger 12. The closing trigger 12 can slide along the opening to partially slide into or partially slide out of the accommodating space.

[0045] When the closure trigger 12 is operated to pivot toward the grip body 11, the outer sleeve 201 is operated to move proximally, causing the angle between the first clamp 31 and the second clamp 32 of the end effector 30 to gradually decrease, until the closure trigger 12 pivots to the closed position, at which point the end effector 30 is in a closed state. When the closure trigger 12 is operated to pivot away from the grip body 11, the outer sleeve 201 of the elongated body assembly 20 moves distally, causing the angle between the first clamp 31 and the second clamp 32 of the end effector 30 to gradually increase, and the end effector 30 gradually opens, until the closure trigger 12 pivots to the open position, at which point the end effector 30 is in a maximally open state.

[0046] When the closure trigger 12 is in the activated position, electrosurgical energy can be supplied to the end effector assembly 30. The electrosurgical instrument is provided with conductive structures within the handle assembly 10 and the elongated body assembly 20, respectively, for transmitting the electrosurgical energy output by the control host 40 to the end effector assembly 30. Specifically, cables 401 and 402 for transmitting electrosurgical energy are disposed within the outer sleeve 201 of the elongated body assembly. The distal ends of the cables 401 and 402 are connected to the first clamp 31 and the second clamp 32 of the end effector assembly 30, respectively, to transmit high-frequency electrosurgical energy to the tissue coagulation electrodes on the first clamp 31 and the second clamp 32.

[0047] The cables 401, 402 extend from the clamping member to the grip body 11 of the handle assembly 10, and a conductive connection structure is provided in the handle assembly 10 for electrically connecting the cables 401, 402 and the output end of the power supply connection part 15. Figure 1 As shown, a dial knob 50 is also provided at the distal end of the handle assembly 10. The dial knob 50 can rotate around the longitudinal axis relative to the gripping body 11. The dial knob 50 is fixedly connected to the outer sleeve 201, and can drive the slender body assembly 20 and the end execution assembly 30 to rotate synchronously. When the first clamp 31 and the second clamp 32 of the end execution assembly 30 rotate around the longitudinal axis, the cables 401 and 402 located inside thereof will rotate synchronously therewith. Therefore, the conductive connection structure of the handle assembly 10 needs to rotate synchronously therewith. Therefore, the conductive connection structure in the handle assembly 10 is a rotating conductive structure 13 that can rotate 360 ​​degrees. Specifically, as Figure 3 As shown, the grip body 11 is provided with a mounting cavity 111 for accommodating a rotating conductive structure 13. The rotating conductive structure 13 includes a stator 131 fixedly embedded in the mounting cavity 111 of the grip body 11, and a rotor 132 rotatably connected to the stator 131. The stator 131 includes first conductive portions 133a, 133b electrically connected to the power supply connection portion 15, and the rotor 132 includes second conductive portions 134a, 134b electrically connected to the cables 401, 402. When the rotor 132 is operatively rotated relative to the stator 131, the first conductive portions 133a, 133b maintain electrical connection with the second conductive portions 134a, 134b. This ensures that when a user operates the dial knob 50, the cables 401, 402 within the elongated body assembly 20 and the end effector assembly 30 rotate synchronously about the longitudinal axis.

[0048] Specifically, at least one of the first conductive portion 133a, 133b and the second conductive portion 134a, 134b is an annular conductive portion that allows the first conductive portion 133a, 133b to maintain electrical connection with the second conductive portion 134a, 134b when the rotor 132 rotates relative to the stator 131. In one embodiment, the first conductive portion 133a, 133b and the second conductive portion 134a, 134b are disposed on the circumferential surface of the stator 131 and the rotor 132 for rotational engagement. For example, the rotor 132 is rotatably inserted into the rotating hole of the stator 131, the first conductive portion 133a, 133b is disposed on the wall of the rotating hole of the stator 131, and the second conductive portion 134a, 134b is disposed on the circumferential outer wall of the rotor 132.

[0049] In another embodiment, referring to Figure 4As shown, the rotor 132 is constructed as a T-shaped shaft structure, the T-shaped shaft includes a large diameter portion 132b and a small diameter portion 132a, and a second conductive portion 134a, 134b is provided on the transition surface 132c between the large diameter portion 132b and the small diameter portion 132a of the T-shaped shaft. Figure 5 As shown, the stator 131 is constructed as a sleeve structure, comprising a first bore 131a for rotationally engaging with the small-diameter portion 132a of the rotor 132, and a second bore 131b for accommodating the large-diameter portion 132b of the rotor 132. The first conductive portions 133a, 133b are provided on a radially extending transition surface 131c between the first and second bores 131a, 131b. Specifically, the first conductive portions 133a, 133b and the second conductive portions 134a, 134b are respectively disposed on axially opposing surfaces of the stator 131 and the rotor 132.

[0050] The first conductive portions 133a and 133b on the stator 131 are configured as two conductive protrusions, which are respectively connected to the positive connection line 405 and the negative connection line 406 of the power supply connection portion 15. The conductive protrusions are arranged radially. The second conductive portions 134a and 134b of the rotor 132 are configured as two coaxially arranged conductive slip rings, which are electrically connected to cables 401 and 402 extending from the clamping member to the handle assembly 10 via cables 403 and 404, respectively.

[0051] In order to avoid stress concentration when the cables 401, 402 extending from the clamping member (the first clamp 31 and the second clamp 32) to the handle assembly 10 are directly connected to the second conductive parts 134a, 134b on the rotor 132, resulting in cable damage and other problems, such as Figure 6 、 Figure 7 As shown, the rotating conductive structure 13 also includes a fixed block 135 that rotates synchronously with the rotor 132. The fixed block 135 is used to realize electrical connection between the cables 401, 402 extending from the clamping members (the first clamp 31 and the second clamp 32) to the handle assembly 10 side and the second conductive parts 134a, 134b on the rotor 132.

[0052] Specifically, if Figure 7As shown, the fixed block 135 is connected to the rotor 132 through an anti-rotation shaft 136 to ensure synchronous rotation between the two. The fixed block 135 is provided with two conductive connection ends 135a, 135b at intervals on a side surface facing the rotor 132. The two conductive connection ends 135a, 135b are respectively electrically connected to two cables 401, 402 extending from the clamping member to the handle assembly 10 side. At the same time, the conductive connection ends 135a, 135b are electrically connected to the second conductive parts 134a, 134b on the rotor 132 through another cable 403, 404. In this way, the two cables 401, 402 extending from the clamping member to the side of the handle assembly 10 first drive the fixed block 135 to rotate, and the anti-rotation shaft 136 on the fixed block 135 and the two cables 403, 404 between the fixed block 135 and the rotor 132 jointly drive the rotor 132 to rotate synchronously, and the stress is dispersed to the three connection points, thereby improving the reliability of the synchronous rotation of the rotor 132 and extending the service life of the cables.

[0053] Specifically, if Figure 8 As shown, the fixing block 135 is located at the proximal end of the rotor 132, and the distal end surface of the fixing block 135 is parallel to the proximal end surface of the rotor 132 and spaced apart. The rotor 132 is provided with a through hole extending in the axial direction. The two cables 401, 402 extending from the clamping member to the handle assembly 10 side pass through the through hole of the rotor 132 and are electrically connected to the conductive connection ends 135a, 135b provided at the distal end of the fixing block 135. Figure 9 、 Figure 10 As shown, the connecting cables 403, 404 between the conductive connecting ends 135a, 135b of the fixed block 135 and the second conductive portions 134a, 134b of the rotor 132 include first portions 403a, 404a located between the fixed block 135 and the rotor 132, and second portions 403b, 404b embedded in the rotor 132. Both ends of the first portions 403a, 404a are rigidly connected to the fixed block 135 and the rotor 132 to ensure the connection strength between the fixed block 135 and the rotor 132, thereby achieving synchronous rotation of the fixed block 135 and the rotor 132.

[0054] like Figure 8 As shown, the conductive connection ends 135a, 135b are constructed as two metal inserts embedded in the fixed block 135, and the outer surfaces of the two metal inserts are flush with the surface of the fixed block 135. The cross-sectional area of ​​the metal inserts is larger than the area of ​​the two cables connected thereto (including the cable extending from the clamping member to the handle assembly 10 side and the cable connected to the second conductive part 134a, 134b of the rotor 132). The two cables can be connected to the conductive connection ends 135a, 135b by welding or other methods.

[0055] like Figure 8 As shown, the anti-rotation shaft 136 is located at the center of the fixing block 136 and the rotor 132, and the conductive connection ends 135a, 135b are symmetrically arranged on both sides of the anti-rotation shaft 136. Figure 11 As shown, the anti-rotation shaft 136 is constructed as a shaft with a D-shaped proximal cross-section, which can prevent it from rotating relative to the fixed block 135. The anti-rotation shaft 136 is snap-connected to the fixed block 135. Specifically, the fixed block 135 is provided with a snap-in hole with a hook structure, and the anti-rotation shaft 136 is provided with a snap-in portion that cooperates with the hook structure. The distal end of the anti-rotation shaft 136 is inserted into the through hole 132d of the rotor 132, and the rotor 132 rotates synchronously with the fixed block 136 under the drive of the cables 403, 404 and the anti-rotation shaft 136.

[0056] like Figure 3 、 Figure 8 As shown, a limiting protrusion 131d is further provided on the outer side of the stator 131 , and a limiting slot 112 is correspondingly provided on the grip body 11 . The limiting protrusion 131d is inserted into the limiting slot 112 to limit the stator 131 on the grip body 11 .

[0057] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An electrosurgical instrument comprising: an end effector assembly including a gripping member forming a jaw structure; The handle assembly is operable to provide driving force and electrosurgical energy to the end effector assembly, characterized in that The handle assembly includes a grip body and a rotating conductive structure installed in the grip body, which includes: The stator and the rotor are provided with a first conductive part electrically connected to the power supply connection part, and the rotor is provided with a second conductive part electrically connected to the clamping member. When the rotor is operably rotated relative to the stator, the first conductive part and the second conductive part remain electrically connected.

2. The electrosurgical instrument according to claim 1, wherein At least one of the first conductive portion and the second conductive portion is a ring-shaped conductive portion.

3. The electrosurgical instrument according to claim 2, wherein: The first conductive portion and the second conductive portion are respectively arranged on circumferentially or axially opposite side surfaces of the stator and the rotor.

4. The electrosurgical instrument according to any one of claims 1 to 3, characterized in that: The rotor is constructed as a T-shaped shaft having a large diameter portion and a small diameter portion. The small diameter portion of the T-shaped shaft is rotatably connected to the stator. A second conductive portion is provided on the transition surface between the large diameter portion and the small diameter portion of the T-shaped shaft.

5. The electrosurgical instrument according to claim 4, wherein The stator is constructed as a sleeve structure, which includes a first hole area for rotationally cooperating with the small-diameter part of the rotor, and a second hole area for accommodating the large-diameter part of the rotor. The first conductive part is provided on the transition surface extending radially between the first hole area and the second hole area.

6. The electrosurgical instrument according to claim 5, characterized in that One of the first conductive portion and the second conductive portion is configured as two conductive protrusions arranged in a radial direction, and the other of the first conductive portion and the second conductive portion is configured as two concentrically arranged conductive slip rings.

7. The electrosurgical instrument according to claim 6, wherein: The first conductive part is two conductive protrusions, and the two conductive protrusions are respectively connected to the positive end and the negative end of the power supply connection part through wires; the second conductive part is two conductive slip rings, and the two conductive slip rings are respectively electrically connected to the two cables extending from the clamping member to the handle assembly side.

8. The electrosurgical instrument according to claim 1, wherein The rotating conductive structure also includes a fixed block that rotates synchronously with the rotor, and the fixed block is connected to the rotor through an anti-rotation shaft. The fixed block has two conductive connection ends spaced apart on a side surface facing the rotor, and the two conductive connection ends are respectively electrically connected to two cables extending from the clamping member to the handle assembly side and the second conductive part on the rotor.

9. The electrosurgical instrument according to claim 8, wherein The anti-rotation shaft is located at the center of the fixing block and the rotor, and the conductive connecting ends are symmetrically arranged on both sides of the anti-rotation shaft.

10. The electrosurgical instrument according to claim 9, wherein The fixing block is located at the proximal end of the rotor. The rotor is provided with a through hole extending axially. Two cables extending from the clamping member to the handle assembly side pass through the through hole of the rotor and are electrically connected to the conductive connection end provided at the distal end of the fixing block.

11. The electrosurgical instrument according to claim 10, wherein: The connecting cable between the conductive connection end of the fixed block and the second conductive part of the rotor includes a first part located between the fixed block and the rotor and a second part embedded in the rotor, wherein both ends of the first part are rigidly connected to the fixed block and the rotor.

12. The electrosurgical instrument according to claim 1, wherein The holding body is provided with an installation cavity for accommodating a rotating conductive structure, the stator is embedded in the installation cavity, a limiting protrusion is provided on the outer side of the stator, and a limiting slot is correspondingly provided on the holding body. The limiting protrusion cooperates with the limiting slot to limit the stator to the holding body.

13. The electrosurgical instrument according to claim 1, wherein It also includes a slender body assembly connected to the distal end of the handle assembly via a dial knob, the slender body assembly defines a longitudinal axis, the dial knob can rotate around the longitudinal axis relative to the grip body, and drive the slender body assembly and the end execution assembly to rotate synchronously.

14. An electrosurgical system, characterized in that It comprises a control host and the electrosurgical instrument according to any one of claims 1 to 13, wherein the electrosurgical instrument is electrically connected to the output end of the control host via a power supply connection portion.

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