Safety high-frequency electrosurgical instruments

Abstract

The present invention discloses a safe high-frequency electrosurgical instrument, comprising a housing, a shaft member, a jaw assembly, a control wrench, a blade, and a control button. The control wrench controls the opening and closing of the jaw assembly via a jaw control mechanism, and the control button drives the blade to move and cut via a blade control mechanism. The control wrench and the control button move in the same direction, and a locking mechanism is provided between the control wrench and the control button. The locking mechanism comprises a locking protrusion and an undercut that can engage with the protrusion. The locking protrusion is provided on the control wrench, and the undercut is provided on the control button or a trigger link. In a first state, the jaw assembly is open, the locking protrusion and the undercut engage, and the control button cannot move. In a second state, the jaw assembly is closed, the locking protrusion is separated from the undercut, and the control button can move to drive the blade to cut. The present invention provides a locking structure and a retraction mechanism to ensure that the blade can only retract and cut when the jaw assembly is closed, thereby ensuring operational safety.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, and in particular to a safe high-frequency electric surgical instrument. Background Art

[0002] The operating end of a high-frequency electrosurgical instrument features jaws and a blade, enabling it to perform multiple functions: clamping tissue, coagulating tissue using high-frequency electrical energy, and severing tissue using the blade. The instrument must be internally equipped with at least a jaw control mechanism that controls the opening and closing of the jaws to clamp tissue, and a blade control mechanism that controls the extension and retraction of the blade to sever tissue. Typically, these two mechanisms are independently configured to facilitate separate operation of the jaws and blade.

[0003] The typical operation of a high-frequency electrosurgical instrument involves first controlling the jaws to close to clamp tissue, then using the blade to cut. This requires maintaining the jaws closed during the cutting process, which requires continuous control of the jaw control mechanism. Existing jaw control mechanisms often have a handle as the control end, which places high demands on the operator's grip stability. Some existing high-frequency electrosurgical instruments incorporate a locking mechanism to lock the jaw control mechanism. However, this mechanism can easily affect the operational flexibility of the jaw control mechanism, resulting in locking failure or failure to reset after locking, resulting in choppy opening and closing of the jaws and inconvenience in operation.

[0004] On the other hand, since the blade control mechanism and the jaw control mechanism work independently, and in order to facilitate hand-held operation, the blade control mechanism and the jaw control mechanism are often arranged on the hand-held handle of the high-frequency electrosurgical instrument. In actual operation, the blade control mechanism and the jaw control mechanism may be accidentally touched because they are set too close to each other, especially before the jaws are controlled to clamp the tissue, the blade may be accidentally triggered, affecting the clamping effect and accidentally cutting the tissue. This brings high difficulty and great inconvenience to the operation of the high-frequency electrosurgical instrument, and there are also considerable safety hazards. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a safe high-frequency electrosurgical instrument and surgical instrument.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A safe high-frequency electric knife surgical instrument includes a shell, a shaft component, a jaw assembly, a control wrench, a blade, and a control button. The control wrench controls the opening and closing of the jaw assembly through a jaw control mechanism, and the control button drives the blade to move and cut through a blade control mechanism. The movement directions of the control wrench and the control button are consistent, and a locking mechanism is provided between the control wrench and the control button. The locking mechanism consists of a locking protrusion and an undercut that can be engaged with the protrusion. The locking protrusion is provided on the control wrench, and the undercut is provided on the control button or on the trigger connecting rod of the blade control mechanism; in a first state, the jaw assembly is opened, the locking protrusion is engaged with the undercut, and the control button cannot be moved; in a second state, the jaw assembly is closed, the locking protrusion is separated from the undercut, and the control button can move to drive the blade to cut. After the control wrench retracts, the locking protrusion is re-engaged with the undercut.

[0008] Preferably, the shaft member extends forward from the front end of the housing and defines a longitudinal axis, the shaft member includes an inner sleeve and an outer sleeve, the jaw assembly is arranged at the front end of the shaft member, and the blade is arranged inside the inner sleeve.

[0009] Preferably, the jaw assembly includes a first jaw arranged at the front end of the inner sleeve and a second jaw arranged at the front end of the outer sleeve, the first jaw is hinged to the second jaw by a first axle pin, and the tail end sides of the first jaw and the second jaw are both provided with guide grooves, the front end of the inner sleeve is connected to the first jaw by a second axle pin, and the two ends of the second axle pin are movably clamped in the guide groove, the guide groove is closed by a baffle, and the inner sleeve drives the first jaw and the second jaw to open and close by longitudinal movement.

[0010] Preferably, the jaw control mechanism includes a closing link, a push block and a jaw spring. The push block is sleeved on the inner sleeve and abuts against the jaw spring sleeved on the tail end of the inner sleeve. The control wrench is connected to the push block through the closing link and drives the push block and the inner sleeve to move longitudinally synchronously.

[0011] Preferably, the inner wall of the shell is provided with a push block guide groove for limiting the moving direction of the push block, and the push block is slidably clamped in the push block guide groove.

[0012] Preferably, the tail end of the push block is in contact with a jaw return spring, and the jaw return spring is clamped in a limiting groove on the inner wall of the shell.

[0013] Preferably, a wrench locking mechanism is provided between the bottom of the control wrench and the shell, and the wrench locking mechanism includes a locking block located on the side of the control wrench and a locking rod located in the shell, a groove with a sliding guide surface is formed on the surface of the locking block, and a limiting groove is provided in the shell, the locking rod elastically moves along the limiting groove, and its tail end is pivotally connected to the shell, and the front end of the locking rod has a convex portion, so that the locking block drives the convex portion to slide along the groove by moving relative to the locking rod.

[0014] Preferably, the surface of the slot is formed with a Z-shaped / concave guide surface, and an inner bending portion is formed in the middle portion. When the convex portion slides along the guide surface to the inner bending portion, the locking block and the locking rod are locked; when the convex portion slides out of the inner bending portion, the locking block and the locking rod are unlocked.

[0015] Preferably, elastic members are abutted on upper and lower sides of the side walls of the housing along the pivoting direction of the locking rod.

[0016] Preferably, two conductive rings are respectively provided outside the outer sleeve, and the two conductive rings are electrically connected to the first jaw and the second jaw through wires.

[0017] Preferably, the two conductive rings are respectively slidably abutted against a conductive sheet, the two conductive sheets are fixed on the inner wall of the shell, and are respectively connected to the power supply through wires; a knob is provided at the front end of the shell, the knob is fixed to the outer sleeve and drives the outer sleeve to rotate synchronously.

[0018] Preferably, the blade rod of the blade is inserted into the inner sleeve, and the blade is movably clamped in a movable groove between the first jaw and the second jaw.

[0019] Preferably, the blade control mechanism includes a trigger link, a feed clip and a blade return spring, the feed clip is connected to the blade rod, the blade return spring is sleeved on the inner sleeve and abuts against the feed clip, the control button is connected to the feed clip through the trigger link, a button guide groove is provided in the shell, the control button slides along the button guide groove and controls the feed clip to move along the inner sleeve to drive the blade to move.

[0020] Preferably, the control wrench is provided with a boss, which is located above the locking protrusion, and the trigger link is provided with a recess matching the boss, and the boss and the recess of the trigger link form an auxiliary retraction mechanism. When the control wrench retracts, the boss abuts against the recess on the trigger link and drives the trigger link to retract synchronously, and the control button retracts synchronously with the trigger link.

[0021] The beneficial effects of the present invention are mainly reflected in:

[0022] 1. A locking structure is provided so that the control wrench restricts the control button. When the jaw assembly is open, the locking protrusion and the undercut engage, preventing the control button from moving, that is, the blade from extending. When the jaw assembly is closed, the locking protrusion moves backward and separates from the undercut, allowing the control button to move and drive the blade to extend, thereby ensuring that the blade moves and cuts only after the jaws clamp the tissue, thereby ensuring operational safety and avoiding accidental triggering of the blade's movement and cutting.

[0023] 2. A wrench locking mechanism is provided between the bottom of the control wrench and the housing to automatically lock the wrench movement, reducing the control pressure on the operator's hand and reducing the difficulty of operation. Due to the Z-shaped slot, the position of the control wrench relative to the housing can be locked or unlocked by repeatedly moving the control wrench, and the operation is smooth.

[0024] 3. The conductive sheet and the conductive ring are arranged to ensure the current conduction while allowing the outer sleeve to rotate freely;

[0025] 4. Set the boss to cooperate with the trigger link to form an auxiliary retraction mechanism to cooperate with the jaw return spring to assist the retraction of the control button. When the control wrench retracts, the boss will drive the trigger link to retract synchronously, thereby driving the control button to retract synchronously. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0027] Figure 1 : A schematic diagram of an embodiment of the present invention;

[0028] Figure 1-1 : A schematic diagram of another feasible embodiment of the present invention;

[0029] Figure 2 : Schematic diagram of the jaw assembly in an embodiment of the present invention;

[0030] Figure 3 : An exploded schematic diagram of a shaft assembly according to an embodiment of the present invention;

[0031] Figure 4 : A partial exploded schematic diagram of a shaft assembly according to an embodiment of the present invention;

[0032] Figure 5 : A partial structural diagram of an embodiment of the present invention;

[0033] Figure 6 : A schematic diagram of an embodiment of the present invention in a first state;

[0034] Figure 7: A schematic diagram of switching from a first state to a second state according to an embodiment of the present invention;

[0035] Figure 8 : A schematic diagram of switching from a first state to a second state according to an embodiment of the present invention;

[0036] Figure 9 : A schematic diagram of an embodiment of the present invention in a second state;

[0037] Figure 10 : An internal schematic diagram of another embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0039] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0040] like Figures 1 to 9As shown, the present invention discloses a safe high-frequency electrosurgical instrument, comprising a housing 1, a shaft member, a jaw assembly, a control wrench 2, a blade 3, and a control button 4. The control wrench 2 controls the opening and closing of the jaw assembly through a jaw control mechanism, and the control button 4 drives the blade 3 to move and cut through a blade control mechanism. The movement directions of the control wrench 2 and the control button 4 are consistent, and a locking mechanism is provided between the control wrench 2 and the control button 4. The locking mechanism comprises a locking protrusion 5 and an undercut 6 that can be engaged with the protrusion 5. The locking protrusion 5 is arranged on the control wrench 2, and the undercut 6 is arranged on the control button 4 or on the trigger link 402 of the blade control mechanism; in the first state, the jaw assembly is opened, the locking protrusion 5 and the undercut 6 are engaged, and the control button 4 cannot be moved; in the second state, the jaw assembly is closed, the locking protrusion 5 is separated from the undercut 6, and the control button 4 can be moved to drive the blade 3 to cut, and after the control wrench 2 retracts, the locking protrusion 5 is re-engaged with the undercut 6.

[0041] The present invention provides a locking mechanism between the control wrench 2 and the control button 4, so that the control wrench 2 has a restrictive effect on the control button 4. When the jaw assembly is in an open state, the locking protrusion 5 and the undercut 6 are engaged, so that the control button 4 can be moved, that is, the blade 3 cannot be extended; when the jaw assembly is in a closed state, the locking protrusion 5 moves backward and separates from the undercut 6, so that the control button 4 has space to move to drive the blade 3 to perform telescopic cutting. The setting of the locking mechanism can ensure that the blade 3 moves and cuts only after the jaws are closed and clamped to clamp the tissue, thereby ensuring safety of use and avoiding accidental triggering of the movement of the blade 3 to cause accidental cutting.

[0042] Specifically, such as Figure 6-9 As shown, the locking protrusion 5 is provided on the extension portion of the control wrench 2 located within the housing 1, and the undercut 6 is preferably provided on the trailing edge of the control button 4. The locking protrusion 5 engages with the undercut 6 to form a locking function, directly restricting the movement of the control button 4. In other feasible embodiments, the undercut 6 may also be provided at other suitable locations on the control button 4.

[0043] like Figure 10As shown, in another feasible embodiment, the locking protrusion 5 does not contact the control button 4. The undercut 6 is positioned on the side or side portion of the trigger link 402, or at any location that ensures engagement with the locking protrusion 5. The locking protrusion 5 engages with the undercut 6, indirectly restricting the movement of the control button 4 by limiting the movement of the trigger link 402, thereby achieving a locking function. The operating principle is that the contact pressure of the trigger link 402 against the locking protrusion 5 creates a torque on the control wrench 2 that is consistent with the direction of its retraction, thereby locking the control button 4.

[0044] Specific examples Figure 2 As shown, the shaft member extends forward from the front end of the shell 1 and defines a longitudinal axis. The shaft member includes an inner sleeve 701 and an outer sleeve 702. The jaw assembly is arranged at the front end of the shaft member, and the blade 3 is arranged inside the inner sleeve 701.

[0045] like Figure 4 As shown, the jaw assembly in this embodiment includes a first jaw 201 disposed at the front end of the inner sleeve 701 and a second jaw 202 disposed at the front end of the outer sleeve 702. The first jaw 201 is hinged to the second jaw 202 via a first axle pin 203. The tail ends of the first jaw 201 and the second jaw 202 are both provided with guide slots 204. The front end of the inner sleeve 701 is connected to the first jaw 201 via a second axle pin 205, and both ends of the second axle pin 205 are movably engaged in the guide slots 204. The inner sleeve 701 drives the first jaw 201 and the second jaw 202 to open and close by longitudinal movement. In this preferred embodiment, the guide slot 204 is closed by a baffle 206, which acts as a limit for the first and second axle pins 203 and 205. This structural arrangement allows the first and second axle pins 203 and 205 to be only cylindrical, which facilitates manufacturing and installation. In other feasible embodiments, the first axle pin 203 and the second axle pin 205 may also be formed with ends having a diameter larger than that of the shaft to play a limiting role, or other components with a limiting role may be used. The working principle of the jaw assembly is as follows: when the inner sleeve 701 moves forward, it will drive the second axle pin 205 to move forward in the guide slot 204 synchronously. Since the first jaw 201 is hinged to the second jaw 202 through the first axle pin 203, the forward movement of the second axle pin 205 will cause the front end of the first jaw 201 to tilt upward, causing the jaw assembly to open; when the inner sleeve 701 moves backward, it will drive the second axle pin 205 to move backward in the guide slot 204 synchronously, causing the front end of the first jaw 201 to move downward until it fits with the second jaw 202, causing the jaw assembly to close.

[0046] Further, such as Figures 6 to 9 As shown, the jaw control mechanism includes a closing link 207, a push block 208 and a jaw spring 209. One end of the extension portion of the control wrench 2 located in the shell 1 is pivotally connected to the shell 1, and the other end is pivotally connected to the closing link 207. The push block 208 is sleeved on the inner sleeve 701 and abuts against the jaw spring 209 sleeved on the tail end of the inner sleeve 701. The control wrench 2 is connected to the push block 208 through the closing link 207, and drives the push block 208 and the inner sleeve 701 to move longitudinally synchronously.

[0047] In order to improve the smoothness and stability of the movement of the jaw control mechanism, the inner wall of the shell 1 is provided with a push block guide groove 210 that limits the moving direction of the push block 208. The push block 208 is slidably clamped in the push block guide groove 210 to ensure that the moving direction of the push block 208 is consistent with the extension direction of the inner sleeve 701, thereby improving the smoothness of the movement of the inner sleeve 701 and avoiding friction between it and other components.

[0048] Furthermore, the rear end of the push block 208 abuts against a jaw return spring 211, which is clamped in a limit groove 212 on the inner wall of the housing 1. The provision of the jaw return spring 211 increases the driving force for returning the push block 208, ensuring the return of the push block 208.

[0049] like Figures 6 to 9 As shown, to further enhance the ease of operation of the control wrench 2, a wrench locking mechanism is provided between the bottom of the control wrench 2 and the housing 1. The wrench locking mechanism comprises a locking block 213 located on the side of the control wrench 2 and a locking rod 214 located within the handle of the housing 1. The tail end of the locking rod 214 is pivotally connected to the housing 1, and elastic members 217 are symmetrically abutted on the upper and lower sides of the locking rod 214 in its direction of movement. The elastic members 217 are preferably springs, but in other embodiments, the elastic members 217 can also be other elastic structures. The symmetrical arrangement of the elastic members 217 ensures balanced forces on the upper and lower sides of the locking rod 214, ensuring that the locking rod 214 remains in a constant position. In this preferred embodiment, the locking rod 214 is maintained in a slightly downwardly tilted position, so that the front end of the slot 215 is always higher than the front end of the locking rod 214. This allows the locking rod 214 to move along the outer contour of the slot 215 when the slot 215 approaches the locking rod 214. At the same time, the locking rod 214 is slidably clamped in the arc-shaped guide groove 218 provided in the shell 1, and moves in an arc shape along the arc-shaped guide groove 218. The arc-shaped guide groove 218 limits the movement of the locking rod 214, further improving the movement stability of the locking rod 214.

[0050] The locking block 213 has a slot 215 formed on its surface. A Z-shaped / concave guide surface 216 is formed on the slot 215, and an inner bend 220 is formed in the middle of the slot 215. The front end of the locking rod 214 has a protrusion 219. The locking block 213 drives the protrusion 219 to slide along the guide surface 216 by moving relative to the locking rod 214. The inner bend 220, which is concave relative to the locking rod 214, locks the protrusion 219. When the protrusion 219 slides into the inner bend 220 of the guide surface 216, the locking block 213 and the locking rod 214 are locked. When the protrusion 219 slides out of the inner bend 220, the locking block 213 and the locking rod 214 are unlocked.

[0051] like Figure 5 As shown, two conductive rings 703 are respectively provided outside the outer sleeve 702 , and the two conductive rings 703 are electrically connected to the first jaw 201 and the second jaw 202 through wires.

[0052] Furthermore, the two conductive rings 703 each slide against a conductive sheet 704, which is fixed to the inner wall of the housing 1 and connected to a power source via wires. A knob 9 is provided at the front end of the housing 1, which is fixed to the outer sleeve 702 and drives the outer sleeve 702 to rotate synchronously. The conductive sheet 704 and the conductive ring 703 cooperate to ensure current conduction while allowing the outer sleeve 702 to rotate freely with the knob 9 without being restricted by the wires.

[0053] like Figure 2 、 Figure 4 As shown, the blade rod 301 of the blade 3 is inserted into the inner sleeve 701 , and the blade 3 is movably clamped in the movable groove 221 between the first jaw 201 and the second jaw 202 , and the movable groove 221 limits the extension and retraction direction of the blade 3 .

[0054] like Figures 6 to 9As shown, the blade control mechanism includes a trigger link 402, a blade feed buckle 403, and a blade return spring 404. The blade feed buckle 403 is connected to the blade rod 301, and the blade rod 301 can rotate relative to the blade feed buckle 403. The blade return spring 404 is sleeved on the inner sleeve 701 and abuts against the blade feed buckle 403. The control button 4 is connected to the blade feed buckle 403 via the trigger link 402. A button guide groove 405 is provided in the housing 1. The control button 4 slides along the button guide groove 405 and controls the blade feed buckle 403 to move along the inner sleeve 701, thereby driving the blade 3 to move. To enhance the flexibility of the connection between the trigger link 402 and the blade feed buckle 403, a waist-shaped hole is formed at the connection between the trigger link 402 and the blade feed buckle 403.

[0055] like Figure 6-9 As shown, the control wrench 2 of the present invention is provided with a boss 8, which is located above the locking protrusion 5. The trigger link 402 is provided with a recess that matches the boss 8. The boss 8 and the recess of the trigger link 402 form an auxiliary retraction mechanism. When the control wrench 2 retracts, the boss 8 abuts against the recess on the trigger link 402 and drives the trigger link 402 to retract synchronously, and the control button 4 follows the trigger link 402 to retract synchronously. The boss 8 cooperates with the trigger link 402 to form an auxiliary retraction mechanism, which can cooperate with the jaw return spring 211 to assist the retraction of the control button 4. When the jaw return spring 211 pushes the control wrench 2 to retract, the boss 8 will drive the trigger link 402 to retract synchronously, achieving the purpose of driving the control button 4 to retract synchronously.

[0056] In other feasible embodiments, the control wrench 2 may not be provided with the boss 8, and the locking protrusion 5 may be used to replace the function of the boss 8, so that the locking protrusion 5 cooperates with the trigger link 402 to form an auxiliary retraction mechanism. The working principle is as follows: when the control wrench 2 retracts, the locking protrusion 5 abuts against the trigger link 402, driving the trigger link 402 to retract synchronously, thereby achieving the purpose of driving the control button 4 to retract synchronously.

[0057] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0058] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A safe high-frequency electrosurgical instrument, characterized by: The invention comprises a housing (1), a shaft member, a jaw assembly, a control wrench (2), a blade (3), and a control button (4); the control wrench (2) controls the opening and closing of the jaw assembly through a jaw control mechanism; the control button (4) drives the blade (3) to move and cut through a blade control mechanism; the movement directions of the control wrench (2) and the control button (4) are consistent; and a locking mechanism is provided between the control wrench (2) and the control button (4); the locking mechanism is composed of a locking protrusion (5) and an undercut (6) capable of being engaged with the locking protrusion (5); the locking protrusion (5) is provided on the control wrench (2); the undercut (6) is provided on the control button (4) or on a trigger link (402) of the blade control mechanism; in a first state, the jaw assembly is opened, the locking protrusion (5) and the undercut (6) are engaged, and the locking mechanism is provided between the control wrench (2) and the control button (4). The control button (4) is immovable; in the second state, the jaw assembly is closed, the locking protrusion (5) is separated from the undercut (6), and the control button (4) can be moved to drive the blade (3) to cut. After the control wrench (2) retracts, the locking protrusion (5) is re-engaged with the undercut (6); a boss (8) is provided on the control wrench (2), and the boss (8) is located above the locking protrusion (5). A recess matching the boss (8) is provided on the trigger link (402), and the boss (8) and the recess of the trigger link (402) form an auxiliary retraction mechanism. When the control wrench (2) retracts, the boss (8) abuts against the recess on the trigger link (402) and drives the trigger link (402) to retract synchronously, and the control button (4) follows the trigger link (402) to retract synchronously.

2. The safe high-frequency electrosurgical instrument according to claim 1, characterized in that: The shaft member extends forward from the front end of the housing (1) and defines a longitudinal axis. The shaft member comprises an inner sleeve (701) and an outer sleeve (702). The jaw assembly is arranged at the front end of the shaft member, and the blade (3) is arranged inside the inner sleeve (701).

3. The safe high-frequency electrosurgical instrument according to claim 2, characterized in that: The jaw assembly comprises a first jaw (201) arranged at the front end of the inner sleeve (701) and a second jaw (202) arranged at the front end of the outer sleeve (702), the first jaw (201) being hinged to the second jaw (202) via a first axle pin (203), the tail end sides of the first jaw (201) and the second jaw (202) being both provided with guide grooves (204), the front end of the inner sleeve (701) being connected to the first jaw (201) via a second axle pin (205), and the two ends of the second axle pin (205) being movably clamped in the guide grooves (204), the guide grooves (204) being closed by baffles (206), and the inner sleeve (701) driving the first jaw (201) and the second jaw (202) to open and close by longitudinal movement.

4. The safe high-frequency electrosurgical instrument according to claim 3, characterized in that: The jaw control mechanism includes a closing link (207), a push block (208) and a jaw spring (209); the push block (208) is sleeved on the inner sleeve (701) and abuts against the jaw spring (209) sleeved on the tail end of the inner sleeve (701); the control wrench (2) is connected to the push block (208) through the closing link (207) and drives the push block (208) and the inner sleeve (701) to move longitudinally synchronously.

5. The safe high-frequency electrosurgical instrument according to claim 4, characterized in that: The inner wall of the housing (1) is provided with a push block guide groove (210) for limiting the moving direction of the push block (208), and the push block (208) is slidably clamped in the push block guide groove (210).

6. The safe high-frequency electrosurgical instrument according to claim 5, characterized in that: The rear end of the push block (208) is in contact with a jaw return spring (211), and the jaw return spring (211) is clamped in a limiting groove (212) on the inner wall of the housing (1).

7. The safe high-frequency electrosurgical instrument according to claim 1, characterized in that: A wrench locking mechanism is provided between the bottom of the control wrench (2) and the housing (1), and the wrench locking mechanism comprises a locking block (213) located on the side of the control wrench (2) and a locking rod (214) located in the housing (1), a surface of the locking block (213) is formed with a slot (215) having a sliding guide surface, an arc-shaped guide groove (218) is provided in the housing (1), the locking rod (214) elastically moves along the arc-shaped guide groove (218), and its tail end is pivotally connected to the housing (1), and the front end of the locking rod (214) has a convex portion (219), so that the locking block (213) drives the convex portion (219) to slide along the slot (215) by moving relative to the locking rod (214).

8. The safe high-frequency electrosurgical instrument according to claim 7, characterized in that: A Z-shaped / concave guide surface (216) is formed on the surface of the card slot (215), and an inner bending portion (220) is formed in the middle portion thereof. When the convex portion (219) slides along the guide surface (216) to the inner bending portion (220), the locking block (213) and the locking rod (214) are locked; when the convex portion (219) slides out of the inner bending portion (220), the locking block (213) and the locking rod (214) are unlocked.

9. The safe high-frequency electrosurgical instrument according to claim 8, characterized in that: Elastic members (217) are abutted on the upper and lower sides of the side wall of the housing (1) along the pivoting direction of the locking rod (214).

10. The safe high-frequency electrosurgical instrument according to claim 3, characterized in that: Two conductive rings (703) are respectively provided outside the outer sleeve (702), and the two conductive rings (703) are electrically connected to the first jaw (201) and the second jaw (202) through wires.

11. The safe high-frequency electrosurgical instrument according to claim 10, characterized in that: The two conductive rings (703) are respectively slidably in contact with a conductive sheet (704), and the two conductive sheets (704) are fixed on the inner wall of the shell (1) and are respectively connected to a power supply through wires; a knob (9) is provided at the front end of the shell (1), and the knob (9) is fixedly connected to the outer sleeve (702) and drives the outer sleeve (702) to rotate synchronously.

12. The safe high-frequency electrosurgical instrument according to claim 4, characterized in that: The blade (301) of the blade (3) is inserted into the inner sleeve (701), and the blade (3) is movably clamped in the movable groove (221) between the first jaw (201) and the second jaw (202).

13. The safe high-frequency electrosurgical instrument according to claim 12, characterized in that: The blade control mechanism further includes a feed buckle (403) and a blade return spring (404), wherein the feed buckle (403) is connected to the blade rod (301), and the blade return spring (404) is sleeved on the inner sleeve (701) and abuts against the feed buckle (403), and the control button (4) is connected to the feed buckle (403) via the trigger connecting rod (402), and a button guide groove (405) is provided in the housing (1), and the control button (4) slides along the button guide groove (405) and controls the feed buckle (403) to move along the inner sleeve (701), thereby driving the blade (3) to move.

14. The safe high-frequency electrosurgical instrument according to any one of claims 1 to 13, characterized in that: The control wrench (2) is a U-shaped open structure or a closed ring structure.

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