Electrosurgical instruments

Abstract

We provide electrosurgical instruments that are easy to operate and safe. [Solution] The electrosurgical instrument 100 belongs to the field of medical devices and comprises an end execution component 30 and a handle component 10 that operably supplies driving force and electrosurgical energy to the end execution component. The handle component includes a gripping body 11 and a closing trigger 12 pivotably connected to the gripping body. The gripping body has a first housing cavity 11c, and the closing trigger has a second housing cavity, and an activation switch for conducting / disabling the transmission of electrosurgical energy is provided in the first housing cavity 11c and / or the second housing cavity. When the closing trigger pivots toward the gripping body to reach the activation position, the activation switch is triggered to a conductive state, and electrosurgical energy is supplied to the end execution component.

Description

[Technical Field]

[0001] Cross-Reference to Related Applications The present application claims priority to the Chinese patent application filed with the China National Intellectual Property Administration on November 4, 2022, with application number 202211378660.4 and titled [Electrosurgical Instrument], the entire content of which is incorporated into the present application by reference.

[0002] The present invention relates to the field of medical devices, and in particular to an electrosurgical instrument. [Background Art]

[0003] A high-frequency electrosurgical knife is an electrosurgical instrument for cutting tissue. When a high-frequency high-voltage current generated at the tip of an electrode contacts biological tissue, it heats the tissue to achieve separation and coagulation of the biological tissue, thereby achieving the objectives of cutting and hemostasis. A bipolar electrosurgical knife is a high-frequency electrosurgical knife with bipolar functions. A high-frequency high-voltage current flows between the two electrodes of the bipolar instrument to dehydrate and contract blood vessel walls, coagulate blood in blood vessels, integrate blood vessels and thrombi, and realize tissue separation and coagulation. Bipolar electrosurgical knives are widely used in various precision surgical operations such as neurosurgery, vascular surgery, microsurgery, and plastic surgery because they cause relatively small thermal damage and can control the electrosurgical cutting speed and electrocoagulation depth.

[0004] Conventional bipolar electrosurgical units typically consist of a handle component, an elongated body component, and an end execution unit. The handle component is connected to a host capable of outputting high-frequency, high-voltage current, and the end execution unit includes a pair of gripping members, which are used to grip the tissue to be cut. These gripping members are driven by a drive mechanism located on the handle component and a transmission mechanism located within the handle component and the elongated body. When using this bipolar electrosurgical unit, the user operates a trigger on the handle component to close the gripping members and grip the tissue to be cut, and then activates the high-frequency energy by operating the activation button on the handle component. Because tissue gripping and energy activation are operated separately, the procedure is lengthy, making it difficult for the surgeon to complete surgery more efficiently and comfortably. Furthermore, the activation button on most bipolar electrosurgical units is exposed on the outside of the handle component, which poses a safety risk as the user may accidentally activate it. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In contrast, the present invention proposes an electrosurgical instrument that is easy to operate and free from safety issues. [Means for solving the problem]

[0006] To address the above technical problems, the present invention provides the following technical solutions.

[0007] An electrosurgical instrument comprising an end execution component and a handle component for manipulatively supplying driving force and electrosurgical energy to the end execution component, wherein the handle component includes a gripping body and a closing trigger pivotably connected to the gripping body, the gripping body having a first housing cavity, the closing trigger having a second housing cavity, and the first and / or second housing cavities provided with an activation switch that can conduct or interrupt the transmission of electrosurgical energy, wherein when the closing trigger pivots toward the gripping body to reach an activation position, the activation switch is triggered to a conductive state, and electrosurgical energy is supplied to the end execution component.

[0008] In some embodiments of the present invention, when the end execution component is in an open state, at least a portion of the closing trigger is housed in the first housing cavity of the gripping body.

[0009] In some embodiments of the present invention, when the closing trigger pivots toward the gripping body, the area in which the closing trigger enters the first containment cavity gradually increases, and when the closing trigger pivots toward the gripping body, the area in which the closing trigger enters the first containment cavity gradually decreases.

[0010] In some embodiments of the present invention, the present invention further includes a power supply connection for electrically connecting to a host that generates electrosurgical energy, and a control circuit board electrically connected to the power supply connection, wherein a start circuit is arranged on the control circuit board, and the start switch operates to connect or disconnect the start circuit, thereby controlling the output of electrosurgical energy to an end execution component.

[0011] In some embodiments of the present invention, the activation switch is a button switch, and the first and / or second housings further include a trigger component for triggering the activation switch, and when the closing trigger pivots to the activation position, the trigger component deviates from its initial state and acts on the activation switch, causing the activation switch to become conductive.

[0012] In some embodiments of the present invention, the activation switch is located within the second housing cavity, and when the closing trigger pivots to the activation position, the activation switch is activated to an operable conductive state.

[0013] In some embodiments of the present invention, the second housing cavity is further provided with a trigger component, the trigger component including a trigger rod, the trigger rod can be operated to deviate from its initial state and act on the activation switch to make it conductive, and the trigger component also includes a return member connected to the trigger rod, the return member providing a biasing force to hold the trigger rod in its initial state.

[0014] In some embodiments of the present invention, a mounting seat is provided in the second housing cavity, the trigger rod of the trigger component is slidably mounted on the mounting seat, and the trigger rod slides on the mounting seat in a first direction to trigger the activation switch to conduct or disconnect, and the return member is provided on the mounting seat to provide a biasing force to the trigger rod.

[0015] In some embodiments of the present invention, one end of the return member acts on the activation switch and the other end acts on the trigger rod of the trigger component, so that the activation switch remains conductive during at least a portion of the movement in which the closing trigger pivots from the activation position to the open position.

[0016] In some embodiments of the present invention, a mounting seat is provided in the second housing cavity, the trigger rod of the trigger component is pivotably mounted on the mounting seat, and the trigger rod pivots along the pivot in a third direction on the mounting seat to trigger the activation switch to conduct or disconnect, and the return member is provided on the mounting seat to provide a biasing force to the trigger rod.

[0017] In some embodiments of the present invention, the first housing cavity is provided with a contact portion for cooperating with the trigger component, and when the closing trigger pivots to the activation position, the contact portion contacts one end of the trigger rod, causing the trigger rod to act on the activation switch against the biasing force of the return member, thereby making the activation switch conductive.

[0018] In some embodiments of the present invention, the activation switch and control circuit board are further mounted on the mounting base.

[0019] In some embodiments of the present invention, a trigger component is further provided in the second housing cavity, the trigger component is provided on the case surface for the user to grasp the closing trigger, and when the closing trigger pivots to the activated position, the trigger component operably conducts the activation switch.

[0020] In some embodiments of the present invention, the closing trigger is provided with a mounting port, the pressing side of the activation switch is directed toward the mounting port, the trigger component includes a sealing cover attached to the mounting port, the sealing cover has an elastically deformable region facing the activation switch, and when the elastically deformable region of the sealing cover is triggered and deformed to a set position in the direction toward the activation switch, the activation switch becomes electrically conductive.

[0021] In some embodiments of the present invention, the pivot trigger force of the closing trigger is smaller than the elastic deformation trigger force of the sealing lid.

[0022] In some embodiments of the present invention, the first housing cavity is further provided with a trigger component, the trigger component including a trigger rod slidably connected to a mounting seat, the trigger rod sliding along a second direction on the mounting seat to trigger the activation switch to conduct or disconnect, and the trigger component including a return member attached to the mounting seat and acting on the trigger rod.

[0023] In some embodiments of the present invention, the activation switch is a contact switch, the activation switch comprises at least one first contact located in the first accommodation chamber and at least one second contact located in the second accommodation chamber, the first contact is electrically connected to the power supply connection portion, the first contact or the second contact is electrically connected to the control circuit board, and when the closure trigger pivots to the activation position, the second contact abuts against the first contact to conduct the activation circuit.

[0024] In some embodiments of the present invention, a guide structure is provided between the gripping main body and the closure trigger, and the guide structure is used for guiding the swinging direction of the closure trigger.

[0025] In some embodiments of the present invention, the handle assembly further comprises a first elastic member and a second elastic member, the closure trigger pivots towards the gripping main body against the elastic force of the second elastic member to reach the closed position, and the closure trigger pivots towards the gripping main body against the elastic forces of the first elastic member and the second elastic member to reach the activation position.

[0026] In some embodiments of the present invention, the device further comprises an elongated body assembly, the elongated body assembly defines a longitudinal axis and comprises an outer tube, and the proximal end of the outer tube extends to the inner side of the gripping main body.

[0027] In some embodiments of the present invention, the closure trigger is operably fitted to the proximal portion of the outer tube via a connecting portion, the connecting portion is formed at the upper end of the closure trigger and is pivotally mounted to the gripping main body.

[0028] In some embodiments of the present invention, the gripping main body is provided with a locking member at a portion located at the proximal end of the outer tube, a proximal spacer, a drive collar, and a retaining ring are sequentially fitted onto the outer tube located inside the gripping main body from the proximal end to the distal end, the retaining ring and the proximal spacer are each fixedly connected to the outer tube, the drive collar is slidable along the outer tube, a spring spacer is provided at the proximal end of the drive collar, the connecting portion of the closing trigger is fitted onto the drive collar, and both ends of the connecting portion abut against the spring spacer and the retaining ring respectively, a first elastic member is provided between the spring spacer and the proximal spacer, a second elastic member is provided between the proximal spacer and the locking member, and the elastic modulus of the first elastic member is larger than the elastic modulus of the second elastic member.

[0029] In some embodiments of the present invention, the handle component further includes a cutting trigger pivotally connected to the gripping main body, and the cutting trigger operably controls the knife actuating member in the end effector component to perform a cutting operation.

[0030] The present invention also provides an electrosurgical instrument, which comprises a handle component that operably supplies driving force and electrosurgical energy to an end effector component, the handle component includes a gripping main body and a closing trigger pivotally connected to the gripping main body, the gripping main body has a first accommodation cavity, the closing trigger has a second accommodation cavity, an activation switch capable of conducting or cutting off the transmission of electrosurgical energy is provided in the second accommodation cavity, when the closing trigger pivots toward the gripping main body, the area of the closing trigger entering the first accommodation cavity gradually increases, when the closing trigger pivots to an activation position, the activation switch is triggered to a conducting state, when the closing trigger pivots in a direction away from the gripping main body, the area of the closing trigger entering the first accommodation cavity gradually decreases, and when the closing trigger pivots to a non-activation position, the activation switch is switched to a cut-off state. Effects of the Invention

[0031] The technical solution of the present invention has the following technical advantages compared to the prior art.

[0032] In the electrosurgical instrument provided by the present invention, the grasping body and / or closing trigger have a housing cavity, and the activation switch for conducting or disconnecting the activation circuit is located within the housing cavity. When the closing trigger pivots from its initial position toward the grasping body to reach the closed position, and then pivots further to the activation position, the activation switch is triggered and electrosurgical energy is activated. This realizes a one-touch interlocking activation circuit via the closing trigger, effectively shortening the operating time for closing and coagulating (cauterizing and sealing) tissue. At the same time, because the activation switch is located inside the grasping body and / or closing trigger, the problem of accidentally touching the activation button is effectively prevented, reducing the safety risk to the patient. [Brief explanation of the drawing]

[0033] The following describes preferred embodiments of the present invention in detail with reference to the drawings. This will help in understanding the objectives and advantages of the present invention. [Figure 1] Figure 1 is a structural diagram of a specific embodiment of the electrosurgical instrument of the present invention. [Figure 2] Figure 2 shows an electrosurgical instrument having a plug-type power supply connection part according to the present invention. [Figure 3] Figure 3 shows an electrosurgical instrument having an electric slip ring type power supply connection part according to the present invention. [Figure 4] Figure 4 shows a specific embodiment of the electrosurgical instrument of the present invention using a button-type activation switch. [Figure 5A] Figure 5A shows a specific embodiment of the electrosurgical instrument of the present invention, with the closure trigger in the closed position. [Figure 5B] Figure 5B shows a specific embodiment of the electrosurgical instrument of the present invention, with the closure trigger in the activated position. [Figure 5C]Figure 5C shows a specific embodiment of the electrosurgical instrument of the present invention, with the closure trigger in the initial open position. [Figure 6] Figure 6 is a diagram showing the internal structure of a closing trigger in a first specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 7] Figure 7 is a structural diagram of the first trigger component in a first specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 8] Figure 8 is a structural diagram of a button-type switch and control circuit board in a first specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 9A] Figure 9A is a structural diagram of the initial open position of a second specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 9B] Figure 9B is a structural diagram of the activation position of a second specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 10A] Figure 10A is a structural diagram of the initial open position of a third specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 10B] Figure 10B is a structural diagram of the activation position of a third specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 11A] Figure 11A is a structural diagram of the initial open position of a fourth specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 11B] Figure 11B is a structural diagram of the activation position of a fourth specific embodiment of the electrosurgical instrument of the present invention using a button-type switch. [Figure 12A] Figure 12A is a structural diagram of the initial open position of a first specific embodiment of the electrosurgical instrument of the present invention using a contact-type switch. [Figure 12B] Figure 12B is a structural diagram of the activation position of a first specific embodiment of the electrosurgical instrument of the present invention using a contact-type switch. [Figure 13]Figure 13 is a structural diagram of a pin-type contact in a first specific embodiment using a contact-type switch for an electrosurgical instrument of the present invention. [Figure 14A] Figure 14A is a structural diagram of the initial open position of a second specific embodiment of the electrosurgical instrument of the present invention using a contact-type switch. [Figure 14B] Figure 14B is a structural diagram of the closing trigger side in a second specific embodiment of the electrosurgical instrument of the present invention using a contact-type switch. [Modes for carrying out the invention]

[0034] The technical solutions of the present invention will be described clearly and completely below with reference to the drawings. However, the embodiments described are only some, not all, embodiments of the present invention. All other embodiments that can be obtained by those skilled in the art without creative work based on the embodiments of the present invention are all within the scope of the protection of the present invention.

[0035] In the description of this invention, the directions or positional relationships indicated by terms such as "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" are based on the directions or positional relationships shown in the drawings and are used solely to describe the invention and simplify the description. They do not indicate or imply that the shown devices or components have a specific orientation or must be configured and operated in a specific orientation, and should not be interpreted restrictively. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and do not indicate or imply relative importance.

[0036] In this description of the present invention, terms such as "attachment," "connection," and "bonding" should be understood broadly unless specifically limited. For example, a connection may be fixed, detachable, or integral. A connection may be directly or indirectly via an intermediate medium. The interiors of two parts may be in communication. Those skilled in the art will be able to understand the specific meaning of these terms in the present invention, depending on the specific circumstances.

[0037] Furthermore, the technical features relating to different embodiments of the present invention, as described below, can be combined insofar as they do not contradict each other.

[0038] In each embodiment of the present invention, "distal end / side" refers to the side that is farther from the operator when manipulating the surgical instrument, and "proximal end / side" refers to the end / side that is closer to the operator when manipulating the surgical instrument.

[0039] The present invention relates as a whole to medical devices, particularly electrosurgical instruments, sometimes referred to as bipolar electrosurgical units, and can be used to cut, coagulate (caute and seal) and / or grasp tissue during surgery, whether open, laparoscopic, or endoscopic. The surgical instrument manipulatively transmits electrosurgical energy to the end execution component 30 to act on the tissue and achieve coagulation (caute and seal), but as shown in Figure 1, the surgical instrument according to this specification can also be used to grasp and manipulate tissue even when electrosurgical energy is not supplied to the end execution component 30. The clamp of the end execution component 30 can be selectively opened, allowing the end execution component 30 to grasp tissue and apply electrosurgical energy to the tissue.

[0040] As shown in Figure 1, the electrosurgical instrument 100 provided by the present invention is typically connected to a host (not shown) that outputs electrosurgical energy. The same electrosurgical instrument 100 can be used in combination with multiple different hosts via an external cable 40. The electrosurgical instrument 100 comprises a handle component 10, an elongated body component 20, and an end execution component 30 connected in order from the proximal end to the distal end. The proximal end of the handle component 10 is provided with a power supply connection 15 for electrical connection to the host. For example, in the specific embodiment shown in Figure 2, the power supply connection 15 is formed in the form of a connector or plug and is configured to easily connect to the output terminal or output connector of the host. In an alternative embodiment, as shown in Figure 3, the power supply connection 15' may be configured in the form of an electrical slip ring, providing a reliable electrical connection when the execution member rotates.

[0041] The end execution component 30 is for manipulating tissue to perform specific surgical operations, such as grasping, coagulating, and cutting tissue. Referring to Figure 1, the end execution component 30 comprises a pivotally connected first clamp 31 and a second clamp 32, which pivot toward each other to grasp tissue and pivot toward each other to release tissue. Alternatively, in an alternative embodiment, the first clamp 31 of the end execution component 30 pivots operable toward the second clamp 32 until the clamp of the end execution component 30 is closed to grasp tissue. The first clamp 31 pivots toward the second clamp 32 until the clamp of the end execution component 30 is opened to release tissue, and vice versa. Furthermore, both the first clamp 31 and the second clamp 32 are equipped with electrode pieces that contact the tissue to transmit electrosurgical energy to the tissue to perform electrocoagulation operations.

[0042] Furthermore, as shown in Figure 1-3, at least a portion of the handle component 10 is a part that the user grips, making it easier for the operator to manipulate the surgical instrument. The handle component 10 controls the supply of driving forces, such as closing force and cutting force, to the end execution component 30. The handle component 10 comprises a gripping body 11 that the user can grip and a closing trigger 12 pivotably connected to the gripping body 11. The user controls the closing or opening operation of the end execution component 30 by operating the closing trigger 12. In one specific embodiment, the gripping body 11 includes a first half case and a second half case, which can be detachably connected by methods such as crimping or fastening. The overall shape of the gripping body 11 is generally T-shaped and includes a main body portion 11a extending in the direction of the vertical axis C and a gripping portion 11b extending in a direction substantially perpendicular to the vertical axis or at a predetermined angle. A first housing cavity 11c is formed inside the main body 11a and the gripping portion 11b, which can house a drive mechanism, start circuitry, and the like. The elongated component 20 includes a plurality of longitudinal members, which operably connect the end execution component 30 to a plurality of actuators housed in the handle component 10. The elongated component 20 includes an outer tube 201, which defines the outer surface of the elongated body and allows other parts to move and pass through its interior. For example, specifically as shown in Figure 4, the outer tube 201 is formed to move longitudinally with respect to an inner actuator member 202 housed axially within the outer tube 201. The inner actuator member 202 may be a rod, shaft, stamped metal part, or other suitable metal part.

[0043] Referring to Figure 4, the closing trigger 12 is operably fitted to the proximal portion of the elongated component 20 via a connecting portion 123. Specifically, the connecting portion 123 is formed at the upper end of the closing trigger 12 and is connected to the proximal portion of the outer tube 201. The connecting portion 123 is pivotally mounted within the case of the gripping body 11 via a pivot 120. Specifically, the connecting portion 123 extends upward, enclosing the opposing sides of the drive collar 124 on the outer tube 201, and is provided with an arc-shaped proximal drive surface 123a and a distal drive surface 123b. The proximal drive surface 123a is joined to the distal surface of the spring spacer 124a of the drive collar 124, and a retaining ring 125 is further fitted onto the outer tube 201, the retaining ring 125 moves with the longitudinal movement of the outer tube 201, and the drive surface 123b is joined to the proximal surface of the retaining ring 125. Furthermore, a proximal spacer 126 is fitted onto the outer tube 201, the proximal spacer 126 moves with the longitudinal movement of the outer tube 201, and a first elastic member 121 is fitted onto the outer tube 201 and provided between the distal surface of the proximal spacer 126 and the drive collar 124. A locking member 127 is provided in the case of the gripping body 11, and a second elastic member 122 is provided between the proximal surface of the proximal spacer 126 and the distal surface of the locking member 127. In some specific embodiments, the elastic modulus of the second elastic member 122 is smaller than that of the first elastic member 121, providing the user with a different gripping feel when the first elastic member 121 and / or the second elastic member 122 are compressed.

[0044] Referring to Figure 4, the handle component 10 further includes a cutting trigger 13 pivotably connected to the gripping body 11, by which the user operates the cutting trigger 13 to cause the knife operating member 203 in the end execution component 30 to perform a cutting operation. The outer tube 201 further contains cables 401 and 402 for transmitting electrosurgical energy, the distal ends of which are connected to the first clamp 31 and second clamp 32 of the end execution component 30, respectively, to transmit high-frequency electrosurgical energy to the tissue clotting electrode pieces of the first clamp 31 and second clamp 32. In some specific embodiments, the elongated component 20 further includes an inner support tube 204, which is used to support and guide the arrangement of the inner actuator member 202, the knife operating member 203, and the cables 401 and 402. Furthermore, a knob 50 is provided at the far end of the handle component 10, and by rotating the knob 50, the user can rotate the elongated component 20 and the end execution component 30 around the vertical axis C. The closing trigger 12 extends so that the side furthest from the connecting portion 123 faces the main body portion 11a of the gripping body 11. The gripping portion 11b of the gripping body 11 has an opening 110 on the side facing the closing trigger 12, and the closing trigger 12 slides along the opening 110, allowing it to partially slide into or out of the first housing cavity 11c.

[0045] Next, with reference to the drawings, the specific structure that realizes the closing, activation, and release operations of the electrosurgical instrument 100 provided by the present invention will be described in detail. Specifically, as shown in Figure 5A, when the closing trigger 12 is pivoted in the direction approaching the gripping body 11 (arrow A), the area in which the closing trigger 12 enters the first housing cavity 11c gradually increases, and the proximal drive surface 123a of the connection portion 123 of the closing trigger 12 moves the spring spacer 124a of the drive collar 124 in the proximal direction (arrow P1). Since the elastic modulus of the first elastic member 121 is greater than that of the second elastic member 122, the action of the first elastic member 121 also moves the proximal spacer 126 in the proximal direction (arrow P1), further compressing the second elastic member 122. Since the proximal spacer 126 is fixedly connected longitudinally to the outer tube 201 of the elongated component 20, the outer tube 201 is moved in the proximal direction (arrow P1), relative motion between the outer tube 201 and the inner actuator member 202 is realized, and the angle between the first clamp 31 and the second clamp 32 of the end execution component 30 gradually decreases, and the end execution component 30 remains in a closed state until the closing trigger 12 pivots to the closed position.

[0046] As shown in Figure 5B, when the closing trigger 12 is pivoted in a direction that brings it further closer to the gripping body 11, the area in which the closing trigger 12 enters the first housing cavity 11c increases further, and the proximal drive surface 123a of the connection portion 123 of the closing trigger 12 moves the spring spacer 124a of the drive collar 124 further proximal (arrow P2), and the first elastic member 121 is further compressed. Since the spring spacer 124a is movable longitudinally relative to the outer tube 201 of the elongated component 20, the outer tube 201 does not move with the proximal movement of the spring spacer 124a, and the end execution component 30 maintains the closed state. When the closing trigger 12 pivots to the activation position, for example as shown in Figure 5B, the trigger component 16 is triggered, the activation circuit conducts, and electrosurgical energy is supplied to the end execution component 30. Since the elastic modulus of the first elastic member 121 is greater than that of the second elastic member 122, when the closing trigger 12 is pivoted from the closed position to the activated position, the first elastic member 121 provides greater biasing force to the operator, allowing the operator to distinguish between the closing operation and the activation operation by the difference in gripping feel.

[0047] Furthermore, as shown in Figure 5C, after the activation operation is completed, when the closing trigger 12 is pivoted away from the gripping body 11 (arrow B), the area in which the closing trigger 12 enters the first housing cavity 11c gradually decreases, and the distal drive surface 123b of the closing trigger 12 moves the retaining ring 125 distally (arrow D) under the action of the restoring force of the first elastic member 121 and / or the second elastic member 122, moving the outer tube 201 of the elongated component 20 distally relative to the inner actuator member 202, the angle between the first clamp 31 and the second clamp 32 of the end execution component 30 gradually increases, the end execution component 30 gradually opens, and the end execution component 30 is in a fully open state until the closing trigger 12 pivots to the open position. In some specific embodiments, when the closing trigger 12 pivots to the open position, at least a portion of the area of ​​the closing trigger 12 is located in the first housing cavity 11c. Of course, the user can switch between closing and opening operations to grasp and release the target tissue, and electrocoagulation may not always be necessary.

[0048] Furthermore, as shown in Figure 2-4, a guide structure is provided between the inner wall of the first housing cavity 11c of the gripping body 11 and the outer wall surface of the closing trigger 12 to support and guide the pivotal movement of the closing trigger 12 and prevent rattling of the closing trigger 12 within the first housing cavity 11c. The guide structure includes a first guide projection 111 or a first guide recess provided on the inner wall of the first housing cavity 11c and a second guide recess or second guide projection provided on the outer wall surface of the closing trigger 12 that is matched thereto. For example, by matching the first guide projection 111 on the inner wall of the first housing cavity 11c with the second guide recess (not shown) on the outer wall surface of the closing trigger 12, directional guidance for the closing or opening operation of the closing trigger 12 can be achieved. Of course, by matching the first guide projection 111 on the inner wall of the first housing cavity 11c with the second guide projection (not shown) on the outer wall surface of the closing trigger 12, directional guidance for relative sliding between them can also be achieved. In a specific embodiment, the closure trigger 12 includes a second housing cavity 12a, which is an open cavity opening towards the gripping body 11. An activation switch is provided in the first housing cavity 11c and / or the second housing cavity 12a, and the activation switch is configured to operate the connection or disconnection of the electrosurgical energy of the electrosurgical instrument 100. For example, when the closure trigger 12 pivots to the activation position, the activation switch 14 is triggered, the activation circuit switches to a conductive state, and the electrosurgical energy output by the host is output to the end execution component 30 via the power supply connection part 15, applying the electrosurgical energy to the tissue of the end execution component 30 to coagulate it, realizing a one-touch closure and activation operation by the closure trigger 12, and shortening the operation time for gripping and coagulating tissue with the instrument. At the same time, because the activation switch is located inside the gripping body 11 and / or the closure trigger 12, the problem of accidentally touching the activation button is effectively prevented, reducing the safety risk to the patient.

[0049] In another alternative embodiment, the side of the closing trigger 12 facing the gripping body 11 is an end face of a solid body without an open cavity, and the activation switch 14 is located in the first housing cavity 11c of the gripping body 11. A trigger structure for triggering the activation switch is provided at the end of the closing trigger 12. When the closing trigger 12 pivots to the activation position inside the first housing cavity 11c of the gripping body 11, the activation switch 14 can be triggered to a conductive state. Corresponding to this embodiment, the side of the gripping body 11 facing the closing trigger 12 is an end face of a solid body without an open cavity. The activation switch is located in the second housing cavity 12a of the closing trigger 12, and a trigger structure for triggering the activation switch is provided at the end of the gripping body 11.

[0050] Specifically, at least a portion of the activation circuit is located on the control circuit board 18, and the activation switch is located on the connecting cable between the power supply connection 15 and the control circuit board 18. In one optional embodiment, the control circuit board 18 is mounted in the second housing cavity 12a of the closing trigger 12, and even when the closing trigger 12 pivots to the open position, a portion of the closing trigger 12 remains in the first housing cavity 11c. The position of the control circuit board 18 in the second housing cavity 12a protects the control circuit board 18 and prevents external dust and liquids from directly contacting the control circuit board 18 through the gap between the gripping body 11 and the closing trigger 12. In other alternative embodiments, the control circuit board 18 may be mounted in the first housing cavity 11c of the gripping body 11.

[0051] The activation switch 14 may be a button switch, which opens the circuit when the button is pressed and closes the circuit when the button is released. Alternatively, in other alternative embodiments, the activation switch 14 may be a contact switch, which opens or closes the circuit by the contact or separation of two contacts. The activation switch 14 may be any other type of switch capable of opening and closing the circuit. For example, in a specific embodiment in which some of the activation switches 14 are button switches, a trigger component 16 for triggering the button switch is further provided in the first housing cavity 11c and / or the second housing cavity 12a, and when the closing trigger 12 pivots to the first position, the trigger component deviates from its initial state and acts on the button switch to open the activation circuit.

[0052] Figures 2-8 show one embodiment of an electrosurgical instrument 100 provided by the present invention, in which the activation switch 14 is provided as a button switch, and a trigger component 16 for triggering the activation switch 14 is provided in the second housing cavity 12a of the closing trigger 12. The trigger component 16 includes a trigger rod 161 slidably connected to a mounting seat 19, and a return part 162 attached to the mounting seat 19 and acting on the trigger rod 161. The trigger rod 161 slides along a first direction on the mounting seat 19 to trigger the activation switch 14 to conduct or disconnect. Here, the activation switch 14 is provided in the second housing cavity 12a, and a contact part 112 for cooperating with the trigger component 16 is provided in the first housing cavity 11c. When the closing trigger 12 is in a non-activating position (for example, in the closed position, open position, or an intermediate position), the trigger rod 161 is in its initial position under the biasing force provided by the return mechanism 162, and at this time, the trigger rod 161 maintains a predetermined distance from the activation switch 14. When the closing trigger 12 pivots to the activation position, the first end 161a (proximal end) of the trigger rod 161 abuts against the contact portion 112, and the second end 161b (distal end) of the trigger rod 161 acts on the activation switch 14 against the elastic force of the return mechanism 162, pressing the activation switch 14 and conducting the activation circuit. When the closing trigger 12 pivots away from the holding body 11, the trigger rod 161 moves with the closing trigger 12 away from the contact portion 112, and under the action of the return mechanism 162, the trigger rod 161 slides again away from the activation switch 14 and returns to its initial position.

[0053] In an alternative embodiment, one end of the return element 162 abuts against the trigger rod 161, and the other end of the return element 162 abuts directly against the activation switch 14, maintaining the activation switch 14 in an activated state for at least part of the process by which the closing trigger 12 moves from the activated position to the deactivated position of the activation switch 14. Specifically, the pressure of the trigger rod 161 compresses the return element 162 between the trigger rod 161 and the activation switch 14, thereby applying a biasing force to the activation switch 14. If the closing trigger 12 is accidentally moved distally by a predetermined angle during the operation of the cutting trigger 13, for example, if the pivot angle of the closing trigger 12 is less than 5°, the return element 162 (currently in a slightly depressurized state) maintains the spring force applied to the activation switch 14, thereby compensating for or partially canceling the effect of the distal movement of the closing trigger 12. As the closing trigger 12 moves distally, the spring force maintained by the return element 162 on the activation switch 14 is large enough to keep the activation switch 14 conductive, preventing the activation switch 14 from being released or re-conducted during the operation of the disconnection trigger 13. During the operation of moving the closing trigger 12 away from the contact portion 112 to switch the end execution component 30 to the open state, the force that moves the trigger rod 161 is much smaller than the force that triggers the activation switch 14. As a result, the return element 162 moves with the trigger rod 161 to its initial position, and the spring force on the activation switch 14 decreases or disappears, causing the activation switch 14 to be released.

[0054] Here, as shown in Figures 2-4, the contact portion 112 in the first housing cavity 11c is formed on the inner wall surface of the first housing cavity 11c, and more specifically, the inner wall surface is convex compared to other areas of the first housing cavity 11c, and the surface cooperating with the trigger rod 161 is a flat surface. As shown in Figures 5-7, the end of the first end 161a of the trigger rod 161 is formed on an arc-shaped surface, allowing for smooth contact with the contact portion 112. The second end 161b of the trigger rod 161 is formed on a cylindrical rod, making surface contact with the pressing surface of the activation switch 14, ensuring reliable triggering. A sliding portion 161c is provided between the first end 161a and the second end 161b of the trigger rod 161. Most preferably, as shown in Figure 7, the mounting seat 19 is provided with a first mounting groove 191 extending in a first direction, and the sliding portion 161c of the trigger rod 161 is slidably connected to the groove wall of the first mounting groove 191 by engaging with it. A first through hole and a second through hole are provided on opposite sides of the first mounting groove 191, and the first end 161a and the second end 161b of the trigger rod 161 can protrude to the outside of the first mounting groove 191 from the first through hole and the second through hole, respectively. In this embodiment, the return part 162 is a compression spring, which is fitted onto the second end 161b of the trigger rod 161, with one end in contact with the sliding portion 161c.

[0055] In the initial or non-activated state, the compression spring causes the sliding portion 161c of the trigger rod 161 to abut against the first side surface (proximal side surface) of the first mounting groove 191, positioning at least a portion of the first end 161a of the trigger rod 161 outside the first mounting groove 191. When the closing trigger 12 is operated in a direction toward the gripping body 11, the first end 161a of the trigger rod 161 of the trigger component 16 abuts against the contact portion 112 of the gripping body 11, and then pushes the trigger rod 161 toward the contact portion 112, positioning the end of the second end 161b of the trigger rod 161 outside the first mounting groove 191, and acting on the button switch 14a located outside the first mounting groove 191.

[0056] In one selectable embodiment, as shown in Figures 6 and 7, the activation switch 14 and the control circuit board 18 are mounted simultaneously on the mounting base 19, achieving integrated mounting. A second mounting groove 192 is further provided on the mounting base 19 adjacent to the first mounting groove 191, and the activation switch 14 is engaged within the second mounting groove 192. The pressing portion of the activation switch 14 is directed toward the second through-hole of the first mounting groove 191, and the second end 161b of the trigger rod 161 is positioned to easily press and trigger it.

[0057] As shown in Figure 7, the mounting seat 19 is further provided with a cable attachment portion 193 for fixing a cable, the cable attachment portion 193 is formed as a rod extending in a second direction, and multiple wire fasteners for securing the cable by tying it are provided on the rod, and the rod is installed close to the inner wall of the distal end of the closing trigger 12. The mounting seat 19 is fixed to the inner wall of the second housing cavity 12a of the closing trigger 12 by engagement or push-in connection. Specifically, the inner wall of the second housing cavity 12a of the closing trigger 12 is provided with a slot formed by multiple ribs, the outer wall of the mounting seat 19 is inserted into this slot, and a positioning projection and a positioning recess are provided between the slot and the mounting seat 19, and the deformable positioning structure of the mounting seat 19 ensures secure mounting and fixing between the two.

[0058] Figures 9A-B show another embodiment of the electrosurgical instrument 100 provided by the present invention, in which the activation switch 24 is provided as a button switch, at least a portion of which is located in the second housing cavity 12a of the closing trigger 12. The trigger component 26 is located in the first housing cavity 11c and includes a trigger rod 261 slidably connected on a mounting seat 29 and a return element 262 mounted on the mounting seat 29 and acting on the trigger rod 261. The trigger rod 261 slides on the mounting seat 29 along a second direction to trigger the pre-activation switch 24 to conduct or disconnect, where the second direction may be the same as or different from the first direction. At least a portion of the activation switch 24 is located in the second housing cavity 12a, and when the closing trigger 12 is in the non-activation position, the end of the trigger rod 261 toward the activation switch 24 protrudes from the mounting seat 29 under the action of the return element 262. When the closing trigger 12 pivots to the activation position, the trigger rod 261 acts on the activation switch 24 against the elastic force of the return mechanism 262, pressing the activation switch 24 and opening the activation circuit. When the closing trigger 12 pivots away from the gripping body 11, the activation switch 24 moves accordingly, away from the trigger rod 261, the activation switch 24 switches to the disconnected state, disconnecting the activation circuit, and the trigger rod 261 slides back to the initial position under the action of the return mechanism 262.

[0059] The mounting seat 29 is integrally molded with the inner wall surface of the gripping body 11, and the mounting seat 29 is provided with a mounting groove 291 extending in a second direction, and an opening is provided on the side of the mounting seat 29 facing the activation switch 24. The trigger rod 261 includes a slide portion 261c that engages with the mounting groove 291, a distal rod portion 261a that extends distally from the slide portion 261c and penetrates the opening, and a proximal rod portion 261b that extends proximal from the slide portion 261c. The return part 262 may be a compression spring, fitted onto the proximal rod portion 261b, with one end abutting against the slide portion 261c and the other end abutting against the inner wall of the mounting seat 29.

[0060] Figures 10A-B show another embodiment of the electrosurgical instrument 100 provided by the present invention, in which the activation switch 34 is a button switch, and at least a portion of the trigger component 36 is located within the second housing cavity 12a of the closing trigger 12. Specifically, the trigger component 36 includes a trigger rod 361 pivotably connected to a mounting seat 39, and a return component 362 (not shown) attached to the mounting seat 39 and acting on the trigger rod 361. The trigger rod 361 swings in a third direction to trigger the activation switch 34 to conduct or disconnect. Here, the activation switch 34 is located within the second housing cavity 12a of the closing trigger 12, and a contact portion 312 for cooperating with the trigger component 16 is provided within the first housing cavity 11c of the gripping body 11. When the closing trigger 12 is in the non-activation position, under the action of the return component 362, the trigger rod 361 is in contact with the activation switch 34 but does not trigger the activation switch 34, or is in an initial position with a set gap. When the front air closing trigger 12 pivots to the activated position, the first end (proximal end) 361a of the trigger rod 361 contacts the contact portion 312, and the second end (distal end) 361b of the front air trigger rod 361 acts on the front air activation switch 34 against the biasing force of the return mechanism 362, pressing the activation switch 34 and conducting the activation circuit. When the closing trigger 12 pivots away from the gripping body 11, the trigger rod 361 moves with the closing trigger 12 away from the contact portion 312, and under the action of the return mechanism 362, the trigger rod 361 slides again away from the activation switch 34 to return to the initial or non-activated position. The activation switch 34 switches to the disconnected state and the activation circuit is disconnected.

[0061] Here, the contact portion 312 in the first housing cavity 11c is formed on the inner wall surface of the first housing cavity 11c, and more specifically, the inner wall surface is convex compared to other areas of the first housing cavity 11c, and the surface cooperating with the trigger rod 361 is a flat surface. A pivot or pivot bearing is provided in the second housing cavity 12a to form the mounting seat 39, and a pivot bearing or pivot is provided corresponding to the trigger rod 361 to pivotally connect to the closing trigger 12. The return part 362 is a spring (twist spring) fitted onto the pivot. The side of the trigger rod 361 furthest from the mounting seat 39 extends to a position facing the pressing portion of the activation switch 34. The end face of the trigger rod 361 facing the activation switch 34 is provided with a trigger projection 361b. This trigger projection 361b acts on the activation switch 34 when the trigger rod 361 cooperates with the contact portion 312, causing it to be pressed.

[0062] Figures 11A-B show another embodiment of the electrosurgical instrument 100 provided by the present invention, in which the activation switch 44 is provided as a button switch. In this specific embodiment, a trigger component 46 for triggering the activation switch 44 is provided on the case surface of the closing trigger 12, and when the closing trigger 12 pivots to the activation position, the trigger component 46 triggers the activation switch 44 to a conductive state by user operation.

[0063] Specifically, a mounting opening is provided on the surface of the case of the closing trigger 12 that is farther from the gripping body 11, the pressing side of the activation switch 44 is directed toward the mounting opening, and the trigger component 46 includes a sealing cover 461 attached to the mounting opening. The sealing cover 461 has an elastically deformable region facing the activation switch 44. When the elastically deformable region is triggered and deforms to a set value in the direction toward the activation switch 44, it switches the state of the activation switch 44.

[0064] To prevent the user from accidentally triggering the trigger component 46 when the closing trigger 12 is in the non-activation position, the trigger force of the elastic deformation region of the sealing lid 461 is set to be greater than the closing pivot force of the closing trigger 12. That is, when the closing trigger 12 is in the initial position, even if the user triggers the elastic deformation region of the sealing lid 461, the closing trigger 12 first pivots toward the first position until it pivots to the activation position, and the activation switch 44 is in contact with the contact portion 412. At this time, the user can further deform the elastic deformation region of the sealing lid 461 to the set value, thereby triggering the activation switch 44 to a conductive state.

[0065] Specifically, the sealing lid 461 is connected to the mounting port side of the closing trigger 12 by engagement, and the area of ​​the outer wall of the closing trigger 12 that is gripped by the user is coated with rubber, and the rubber coating layer 12b covers the fitting position between the sealing lid 461 and the mounting port, preventing dust and other external particles from entering the inside of the closing trigger 12 through the gap between them.

[0066] Figures 12A-B show another embodiment of the electrosurgical instrument 100 provided by the present invention, in which the activation switch 54 is a contact switch, and at least a portion of the activation circuit is located on a control circuit board 28. The activation switch 54 includes at least one first contact 54a located in the first housing cavity 11c and at least one second contact 54b located in the second housing cavity 12a. The first contact 54a is electrically connected to the power supply connection 15, and the second contact 54b is electrically connected to the control circuit board 28. When the closing trigger 12 is in the non-activation position, the first contact 54a and the second contact 54b are separated, and the activation circuit is disconnected. When the closing trigger 12 pivots to the activation position, the second contact 54b contacts the first contact 54a, and the activation circuit is made conductive.

[0067] Specifically, the first housing cavity 11c of the gripping body 11 is provided with two first contacts 54a connected in parallel to each other, and correspondingly, the second housing cavity 12a of the closing trigger 12 is provided with two second contacts 54b connected in parallel to each other. When the closing trigger 12 pivots to the activated position, the two sets of parallel-connected second contacts 54b cooperate with the first contacts 54a to connect the activation circuit, thereby improving the operational reliability of the activation switch 14.

[0068] Furthermore, the first contact 54a and the second contact 54b may be pin-type contacts, specifically as shown in Figure 13, the pin-type contacts include a fixed base C1 and a movable pin C slidably connected on the fixed base C1. A compression spring S is provided between the movable pin C and the fixed base C1, thereby ensuring reliable electrical contact within a certain range when the first contact 54a and the second contact 54b make contact.

[0069] Figures 14A-B show another embodiment of the electrosurgical instrument 100 provided by the present invention, in which the activation switch 64 is a contact switch, and at least a portion of the activation circuit is located on a control circuit board 38. The activation switch 64 includes at least one first contact 64a located in the first housing cavity 11c and at least one second contact 64b located in the second housing cavity 12a. The first contact 64a is electrically connected to the power supply connection 15 via the control circuit board 38. When the closing trigger 12 is in the non-activation position, the first contact 64a and the second contact 64b are separated, and the activation circuit is disconnected. When the closing trigger 12 pivots to the activation position, the second contact 64b contacts the first contact 64a, and the activation circuit is made conductive.

[0070] Clearly, the embodiments described above are merely illustrative examples for clarity and do not limit the embodiments. A person ordinary in the art could make other different forms of modifications or variations based on the above description. It is neither necessary nor possible to cover all embodiments here. Changes or variations that are obviously derived from these descriptions still fall within the scope of protection of the present invention.

Claims

1. Electrosurgical instruments, End execution component, The end execution component is further equipped with a handle component that controls the supply of driving force and electrosurgical energy. The handle component includes a gripping body and a closing trigger pivotably connected to the gripping body. The end of the handle component opposite to the end execution component is further provided with a power supply connection for electrically connecting to a host that generates electrosurgical energy. The grasping body has a first housing cavity, the closing trigger has a second housing cavity, the second housing cavity is provided with an activation switch for conducting or cutting off the transmission of electrosurgical energy and a trigger component for triggering the activation switch, and the first housing cavity is provided with a contact portion for cooperating with the trigger component. An electrosurgical instrument, wherein when the closing trigger pivots toward the gripping body and reaches the activation position, the trigger component contacts the contact portion, thereby pressing the activation switch, which is triggered to become conductive in order to supply electrosurgical energy to the end execution component.

2. The electrosurgical instrument according to claim 1, wherein when the end execution component is in an open state, at least a portion of the closing trigger is housed in the first housing cavity of the gripping body.

3. The electrosurgical instrument according to claim 1, wherein when the closing trigger pivots toward the gripping body, the area in which the closing trigger enters the first housing cavity gradually increases, and when the closing trigger pivots toward the gripping body, the area in which the closing trigger enters the first housing cavity gradually decreases.

4. A control circuit board electrically connected to the power supply connection section is placed inside the second housing cavity. The electrosurgical instrument according to claim 1, wherein a start circuit is arranged on the control circuit board, and the start switch is operable to conduct or disconnect the start circuit in order to control the output of electrosurgical energy to the end execution component.

5. The electrosurgical instrument according to claim 1, wherein the activation switch is a button switch.

6. The trigger component includes a trigger rod and a return member connected to the trigger rod. The trigger rod can be operated to deviate from its initial state and act on the activation switch to create a conductive state. The electrosurgical instrument according to claim 1, wherein the return member provides a biasing force to hold the trigger rod in its initial state.

7. The electrosurgical instrument according to claim 6, wherein a mounting seat is provided in the second housing cavity, the trigger rod of the trigger component is slidably mounted on the mounting seat, the trigger rod slides on the mounting seat along a first direction to trigger the activation switch to conduct or disconnect, and the return member is provided on the mounting seat to provide a biasing force to the trigger rod.

8. The electrosurgical instrument according to claim 7, wherein one end of the return member acts on the activation switch and the other end acts on the trigger rod of the trigger component, and the activation switch maintains a conductive state during at least a portion of the movement in which the closing trigger pivots from the activation position to the open position.

9. The electrosurgical instrument according to claim 6, wherein a mounting seat is provided in the second housing cavity, the trigger rod of the trigger component is pivotably mounted on the mounting seat, and the trigger rod pivots along the pivot in a third direction on the mounting seat to trigger the activation switch to conduct or disconnect, and the return member is provided on the mounting seat to provide a biasing force to the trigger rod.

10. The electrosurgical instrument according to any one of claims 6 to 10, wherein when the closing trigger pivots to the activation position, the contact portion contacts one end of the trigger rod, the trigger rod acts on the activation switch against the biasing force of the return member, and the activation switch becomes conductive.

11. The electrosurgical instrument according to claim 1, wherein the handle component further includes a first elastic member and a second elastic member, and the closing trigger pivots toward the gripping body against the elasticity of the first elastic member and the second elastic member to reach the activation position.

12. The present invention further comprises an elongated component, the elongated component defining a longitudinal axis and including an outer tube, the near end of the outer tube extending to the inside of the gripping body, The electrosurgical instrument according to claim 11, wherein the closing trigger is fitted to the proximal portion of the outer tube in an operable manner via a connecting portion, the connecting portion is formed at the upper end of the closing trigger and is pivotably attached to the gripping body.

13. The gripping body has a locking member at the proximal end of the outer tube, and the outer tube located within the gripping body has a proximal spacer, a drive collar, and a retaining ring fitted to it in order from the near end to the far end, the retaining ring and the proximal spacer are fixedly connected to the outer tube, and the drive collar is slidable along the outer tube. A spring spacer is provided at the near end of the aforementioned drive collar. The connection portion of the closing trigger is fitted into the drive collar, and both ends of the connection portion of the closing trigger are in contact with the spring spacer and the retaining ring, respectively. The electrosurgical instrument according to claim 12, wherein the first elastic member is provided between the spring spacer and the proximal spacer, the second elastic member is provided between the proximal spacer and the locking member, and the elastic modulus of the first elastic member is greater than the elastic modulus of the second elastic member.

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