Jaw separating device for minimally invasive energy instrument trigger and using method of jaw separating device

Abstract

The invention discloses a jaw separating device for a minimally invasive energy instrument trigger and a using method of the jaw separating device, and belongs to the technical field of medical instruments. The jaw separating device for the minimally invasive energy instrument trigger comprises an instrument main body and a narrow jaw clamp, the instrument main body comprises a handle, a trigger assembly is arranged on one side of the handle, a clutch key shifting rod is arranged at the top of the instrument main body, and an adjusting sleeve head is arranged at one end of the instrument main body. An outer pipe is arranged in the adjusting sleeve head and is of a hollow structure. In order to solve the problem that in the using process of an existing minimally invasive energy instrument, midway power failure is likely to happen, so that a jaw is closed and cannot be loosened, a trigger and a connector are in a separated state, at the moment, the trigger cannot be controlled, and when the trigger and the connector are in a combined state, opening and closing operation of the jaw can be controlled through the trigger; and when the trigger is switched from the combined state to the separated state, the jaw is automatically switched from the closed state to the unfolded state.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a jaw disengagement device for a trigger of a minimally invasive energy device and a use method thereof. Background Art

[0002] In minimally invasive surgery, minimally invasive energy instruments are medical instruments that medical personnel often use to clamp and cut off internal tissues of the human body. Existing minimally invasive energy instruments, such as ultrasonic soft tissue cutting and hemostasis systems, electric laparoscopic cutting and staplers, etc., all realize the opening and closing of the forceps head through an operating handle, can drive the rotation of the forceps head through a rotating mechanism, and can lock the forceps head through a locking assembly to fix and maintain the posture of the forceps head.

[0003] Existing minimally invasive energy devices are prone to power outages during use, resulting in the jaws not closing and not releasing. Summary of the invention

[0004] The purpose of the present invention is to provide a jaw disengagement device for a trigger of a minimally invasive energy instrument and a method of using the same. The clutch key block can be controlled to translate inside the slide slot seat through a clutch key lever. The trigger and the connector are in a separated state, and the trigger cannot be controlled at this time. When the trigger and the connector are in a coupled state, the opening and closing operations of the jaws can be controlled by the trigger. When the trigger switches from the coupled state to the separated state, the jaws will automatically change from closed to extended. This can effectively avoid the jaws from getting stuck and solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a jaw disengagement device for a trigger of a minimally invasive energy instrument, comprising an instrument body and a narrow-mouthed clamp, wherein the instrument body comprises a handle, a trigger assembly is arranged on one side of the handle, a clutch key lever is arranged on the top of the instrument body, an adjustment sleeve is arranged at one end of the instrument body, wherein an outer tube is arranged inside the adjustment sleeve, the outer tube is arranged as a hollow structure, an inner tube jaw is arranged at one end of the outer tube, a movable jaw is arranged above the inner tube jaw, wherein the movable jaw is rotatably connected to the outer tube, and the outer tube is arranged at the top of the instrument body. The tube part, if it is an ultrasonic scalpel, the outer tube is an open metal tube, and the inner tube is wrapped with a titanium rod. The titanium rod and the closable jaws of the inner tube are completely closed. If it is an electric laparoscopic cutting stapler, the outer tube is a fixed half jaw, which is completely closed with the closable jaws of the inner tube. Pull the trigger, and the trigger drives the trigger slider to operate through the lever principle. The trigger slider is connected to the sliding module of the inner tube, causing the inner tube to move back and forth, driving the front closable jaw to open or close. The connection between the trigger slider and the sliding module of the inner tube uses a clutch key lever to control the connection or disconnection state of the association between the trigger and the jaw.

[0006] Preferably, a slide is provided above the clutch key lever, and a tool bar pull block is provided below the clutch key lever, wherein a motor driver is provided at one end of the slide, and the tool bar pull block, the slide and the motor driver are all installed inside the instrument body.

[0007] Preferably, a terminal is provided at one end of the motor driver, the terminal is electrically connected to the motor driver, a transfer coupling is provided at the other end of the motor driver, an inner pull rod is provided inside the motor driver, wherein the motor driver is connected to the slide via the transfer coupling.

[0008] Preferably, a locking slider is provided inside the slide, and the locking slider is slidably connected to the slide through a limiting slide rod. A transfer slide is provided at the bottom of the locking slider, and the transfer slide is connected to the locking slider through bolts. A slide groove seat is provided on the top of the tool rod pull block, and the clutch key lever is located between the slide groove seat and the transfer slide.

[0009] Preferably, a clutch key block is provided at one end of the clutch key lever, and the clutch key lever is slidably connected to the slide slot seat through the clutch key block, and a mounting sleeve groove is provided inside the knife bar pull block, and an integrally formed guide rod is provided at the bottom of the knife bar pull block, and the clutch key block can be controlled to translate inside the slide slot seat through the clutch key lever. When the clutch key lever is located at the end face of the slide slot seat, the trigger and the connector are in a separated state, and the trigger cannot be controlled at this time; when the clutch key lever moves to the middle area of ​​the slide slot seat, the trigger and the connector are in a combined state, and the opening and closing operations of the jaws can be controlled by the trigger, and when the trigger switches from the combined state to the separated state, the jaws will automatically change from closed to opened, which can effectively avoid the jaws from getting stuck.

[0010] Preferably, a clamp plate assembly is provided at one end of the narrow-mouth clamp, and a transition groove is provided at the other end of the narrow-mouth clamp, wherein the narrow-mouth clamp is connected to an outer tube via the transition groove, an inner tube is provided inside the outer tube, and the inner tube extends to the inside of the transition groove. The narrow-mouth clamp can replace the inner tube jaws and the movable jaws for surgical operations with smaller incisions.

[0011] Preferably, a contraction groove is provided inside the narrow-mouth pliers, a return spring is provided between the contraction groove and the transfer rotation groove, a synchronization shaft is provided inside the contraction groove, the synchronization shaft is slidably connected to the contraction groove, two main connecting arms are provided inside the synchronization shaft, one end of the main connecting arm is rotatably connected to the synchronization shaft, wherein the other end of the main connecting arm is provided with an expansion connecting arm, the expansion connecting arm is rotatably connected to the main connecting arm, and the inner tube is connected to the synchronization shaft, and the inner tube is used to realize the forward and backward sliding of the synchronization shaft. After pulling the trigger, the inner tube moves backward and drives the synchronization shaft to contract. During the backward movement of the synchronization shaft, the angle between the main connecting arms on both sides will be reduced. At this time, the clamp plate assembly connected to the expansion connecting arm will unfold, and the needle-nosed jaws will be moved to the surgical area to release the trigger. The synchronization shaft pops out under the action of the return spring, and the needle-nosed jaws are closed to complete the clamping operation. During the clamping process, there is no need to press the trigger with your fingers, which can effectively avoid hand fatigue caused by pressing the trigger for a long time.

[0012] Preferably, bridge rods are provided on both sides of one end of the expansion link arm, the bridge rods are rotatably connected to the expansion link arm, one end of the pliers assembly is provided with a pointed jaw, and the other end of the pliers assembly is provided with a limiting center axis, wherein the limiting center axis is connected to the narrow-mouth pliers via a slot.

[0013] Preferably, the clamp plate assembly is slidably connected to the limiting central axis via a support shaft, and side twist shafts are provided on both sides of the other end of the clamp plate assembly. The side twist shafts are rotatably connected to the bridge rod, and the inner tube is connected to the synchronization shaft. The clamp plate assembly is flipped and clamped with the limiting central axis as the center through the support shaft. The limiting central axis can ensure that the clamp plate assembly will not be offset or misaligned during the unfolding and closing process, thereby ensuring a more powerful clamping operation.

[0014] A method for using a jaw disengagement device for a trigger of a minimally invasive energy instrument comprises the following steps:

[0015] Step 1: When the clutch key lever and the transfer slide are in sliding engagement, by pressing the trigger assembly, the trigger drives the trigger slider to operate through the lever principle, and the trigger slider is connected to the sliding module of the inner tube, causing the inner tube to move backward, driving the front closable jaws to close;

[0016] Step 2: When the clutch key lever slides away from the transfer slide, the trigger and the jaws are disconnected, and the inner tube loses the linkage control of the trigger, and the inner tube resets forward, driving the front end of the closable jaws to open;

[0017] Step 3: The jaws at the front end can be disassembled and replaced, and then the narrow-mouthed clamp adapter rotation groove is connected to the outer tube, and the inner tube is connected to the synchronous shaft, and the inner tube is used to realize the forward and backward sliding of the synchronous shaft.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, the clutch key block can be controlled to translate inside the slide slot seat through the clutch key lever. When the clutch key lever is located at the end surface of the slide slot seat, the trigger and the connector are in a separated state, and the trigger cannot be controlled at this time. When the clutch key lever moves to the middle section of the slide slot seat, the trigger and the connector are in a combined state, and the opening and closing operations of the jaws can be controlled by the trigger. When the trigger switches from the combined state to the separated state, the jaws will automatically change from closed to opened, which can effectively avoid the jaws from getting stuck.

[0020] 2. The present invention utilizes an inner tube to realize the forward and backward sliding of the synchronization shaft. After the trigger is pulled, the inner tube moves backward and drives the synchronization shaft to contract. During the backward movement of the synchronization shaft, the angle between the main connecting arms on both sides will be reduced. At this time, the clamp plate assembly connected to the expansion connecting arm will be unfolded, and the needle-nosed jaws will be moved to the surgical area and the trigger will be released. The synchronization shaft will pop out under the action of the reset spring, and the needle-nosed jaws will close to complete the clamping operation. During the clamping process, there is no need to press the trigger with your fingers, which can effectively avoid hand fatigue caused by pressing the trigger for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall front view of the present invention;

[0022] Figure 2 It is a schematic diagram of the clutch key lever structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the motor driver of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the carriage of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the clutch key block of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the narrow-mouth clamp of the present invention;

[0027] Figure 7 It is a schematic diagram of the internal structure of the narrow-mouth pliers of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the clamp assembly of the present invention.

[0029] In the figure: 1, instrument body; 2, clutch key lever; 3, outer tube; 4, inner tube jaw; 5, movable jaw; 6, knife bar pull block; 7, slide; 8, motor driver; 9, narrow jaw pliers; 101, handle; 102, trigger assembly; 103, adjustment sleeve; 201, clutch key block; 601, guide rod; 602, mounting sleeve groove; 603, slide seat; 701, locking slide; 702, transfer slide Seat; 703, limit slide bar; 801, inner pull rod; 802, terminal; 803, transfer coupling; 901, clamp assembly; 902, transfer rotation groove; 903, return spring; 904, synchronization shaft; 905, main link arm; 906, expansion link arm; 907, bridge rod; 908, contraction groove; 909, limit center axis; 9011, needle-nosed jaws; 9012, side twisted axis; 9013, support shaft. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to solve the problem that the existing minimally invasive energy devices are prone to power failure during use, resulting in the jaws not closing and not releasing; please refer to Figure 1-8 , the present invention provides the following solutions:

[0032] A jaw disengagement device for a trigger of a minimally invasive energy instrument comprises an instrument body 1 and a narrow-mouthed clamp 9, wherein the instrument body 1 comprises a handle 101, a trigger assembly 102 is arranged on one side of the handle 101, a clutch key lever 2 is arranged on the top of the instrument body 1, an adjustment sleeve 103 is arranged at one end of the instrument body 1, wherein an outer tube 3 is arranged inside the adjustment sleeve 103, the outer tube 3 is arranged as a hollow structure, an inner tube jaw 4 is arranged at one end of the outer tube 3, an active jaw 5 is arranged above the inner tube jaw 4, wherein the active jaw 5 is rotatably connected to the outer tube 3, and the instrument body 1 comprises a trigger assembly 102, inner tube, outer tube 3, inner tube jaws 4, movable jaws 5 and clutch key lever 2, and the trigger slider inside the trigger assembly 102 is connected to the inner tube necklace and the outer tube 3. If it is an ultrasonic scalpel, the outer tube 3 is an open metal tube, and the inner tube is wrapped with a titanium rod. The titanium rod and the closable jaws of the inner tube are completely closed. If it is an electric laparoscopic cutting stapler, the outer tube 3 is a fixed half jaw, which is completely closed with the closable jaws of the inner tube. Pull the trigger, and the trigger drives the trigger slider to operate through the lever principle. The trigger slider is connected to the sliding module of the inner tube, causing the inner tube to move back and forth, driving the front closable jaws to open or close.

[0033] A clutch key 2 is used at the connection between the trigger slider and the sliding module of the inner tube to control the connection or disconnection state of the association between the trigger and the jaws.

[0034] Furthermore, a slide 7 is arranged above the clutch key lever 2, and a tool rod pull block 6 is arranged below the clutch key lever 2, wherein a motor driver 8 is arranged at one end of the slide 7, and the tool rod pull block 6, the slide 7 and the motor driver 8 are all installed inside the instrument body 1.

[0035] Furthermore, a terminal 802 is provided at one end of the motor driver 8, and the terminal 802 is electrically connected to the motor driver 8. A switching coupling 803 is provided at the other end of the motor driver 8, and an inner pull rod 801 is provided inside the motor driver 8, wherein the motor driver 8 is connected to the slide 7 via the switching coupling 803.

[0036] Furthermore, a locking slider 701 is provided inside the slide 7, and the locking slider 701 is slidably connected to the slide 7 through a limiting slide rod 703. A transfer slide 702 is provided at the bottom of the locking slider 701, and the transfer slide 702 is connected to the locking slider 701 through bolts. A slide groove seat 603 is provided on the top of the tool rod pull block 6, and the clutch key lever 2 is located between the slide groove seat 603 and the transfer slide 702.

[0037] Furthermore, a clutch key block 201 is provided at one end of the clutch key lever 2, and the clutch key lever 2 is slidably connected to the slide slot seat 603 through the clutch key block 201. A mounting sleeve groove 602 is provided inside the knife bar pull block 6, and an integrally formed guide rod 601 is provided at the bottom of the knife bar pull block 6. The clutch key block 201 can be controlled to translate inside the slide slot seat 603 through the clutch key lever 2. When the clutch key lever 2 is located at the end face of the slide slot seat 603, the trigger and the connector are in a separated state, and the trigger cannot be controlled at this time. When the clutch key lever 2 moves to the middle section of the slide slot seat 603, the trigger and the connector are in a combined state. The opening and closing operations of the jaws can be controlled by the trigger. When the trigger switches from the combined state to the separated state, the jaws will automatically change from closed to opened, which can effectively avoid the jaws from getting stuck.

[0038] Furthermore, a clamp plate assembly 901 is provided at one end of the narrow-mouthed forceps 9, and a transition groove 902 is provided at the other end of the narrow-mouthed forceps 9, wherein the narrow-mouthed forceps 9 is connected to the outer tube 3 through the transition groove 902, and an inner tube is provided inside the outer tube 3, and the inner tube extends to the inside of the transition groove 902. The narrow-mouthed forceps 9 can replace the inner tube jaw 4 and the movable jaw 5, and is used for surgical operations with smaller incisions.

[0039] Further, the narrow-mouth clamp 9 is provided with a contraction groove 908 inside, a return spring 903 is provided between the contraction groove 908 and the transfer rotation groove 902, a synchronization shaft 904 is provided inside the contraction groove 908, the synchronization shaft 904 is slidably connected to the contraction groove 908, and two main link arms 905 are provided inside the synchronization shaft 904, one end of the main link arm 905 is rotatably connected to the synchronization shaft 904, wherein the other end of the main link arm 905 is provided with an expansion link arm 906, and the expansion link arm 906 is rotatably connected to the main link arm 905, and the inner tube is used to realize the front movement of the synchronization shaft 904 After sliding back, after pulling the trigger, the inner tube moves backward and drives the synchronization shaft 904 to retract. During the movement of the synchronization shaft 904 backward, the angle between the main connecting arms 905 on both sides will be reduced. At this time, the clamp plate assembly 901 connected to the expansion connecting arm 906 will be unfolded, and the needle-nosed jaws 9011 will be moved to the surgical area and the trigger will be released. The synchronization shaft 904 pops out under the action of the reset spring 903, and the needle-nosed jaws 9011 close to complete the clamping operation. During the clamping process, there is no need to press the trigger with your fingers, which can effectively avoid hand fatigue caused by pressing the trigger for a long time.

[0040] Furthermore, bridge rods 907 are provided on both sides of one end of the extension link 906, and the bridge rods 907 are rotatably connected to the extension link 906. A pointed jaw 9011 is provided at one end of the pliers assembly 901, and a limiting center axis 909 is provided at the other end of the pliers assembly 901, wherein the limiting center axis 909 is connected to the narrow-mouth pliers 9 through a slot.

[0041] Furthermore, the clamp plate assembly 901 is slidably connected to the limiting central axis 909 via a support shaft 9013, and side twist shafts 9012 are provided on both sides of the other end of the clamp plate assembly 901. The side twist shafts 9012 are rotatably connected to the bridge rod 907, and the inner tube is connected to the synchronization shaft 904. The clamp plate assembly 901 is flipped and clamped with the limiting central axis 909 as the center through the support shaft 9013. The limiting central axis 909 can ensure that the clamp plate assembly 901 will not be offset or misaligned during the unfolding and closing process, thereby ensuring a more powerful clamping operation.

[0042] Working principle: when the clutch key lever 2 and the adapter slide 702 are in sliding engagement, by pressing the trigger assembly 102, the trigger drives the trigger slider to operate through the lever principle, and the trigger slider is connected to the sliding module of the inner tube, causing the inner tube to move backward, driving the front end closable jaw to close, and when the clutch key lever 2 and the adapter slide 702 are slid apart, the association between the trigger and the jaw is disconnected, and the inner tube loses the linkage control of the trigger, and the inner tube resets forward, driving the front end closable jaw to open, and the front end jaw can be disassembled and replaced, and then the narrow-mouth clamp 9 is connected to the adapter rotation groove 902 and the outer tube 3, and the inner tube is connected to the synchronization shaft 904, and the inner tube is used to realize the forward and backward sliding of the synchronization shaft 904.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A jaw disengagement device for a trigger of a minimally invasive energy instrument, characterized in that: The invention comprises an instrument body (1) and a narrow-mouth pliers (9), wherein the instrument body (1) comprises a handle (101), a trigger assembly (102) is arranged on one side of the handle (101), a clutch key lever (2) is arranged on the top of the instrument body (1), and an adjustment sleeve (103) is arranged at one end of the instrument body (1), wherein an outer tube (3) is arranged inside the adjustment sleeve (103), the outer tube (3) is arranged as a hollow structure, an inner tube jaw (4) is arranged at one end of the outer tube (3), and a movable jaw (5) is arranged above the inner tube jaw (4), wherein the movable jaw (5) is rotatably connected to the outer tube (3).

2. A jaw disengagement device for a trigger of a minimally invasive energy instrument according to claim 1, characterized in that: A slide (7) is arranged above the clutch key lever (2), and a knife bar pull block (6) is arranged below the clutch key lever (2), wherein a motor driver (8) is arranged at one end of the slide (7), and the knife bar pull block (6), the slide (7) and the motor driver (8) are all installed inside the instrument body (1).

3. A jaw disengagement device for a trigger of a minimally invasive energy instrument according to claim 2, characterized in that: One end of the motor driver (8) is provided with a terminal (802), and the terminal (802) is electrically connected to the motor driver (8). The other end of the motor driver (8) is provided with a switching coupling (803), and an inner pull rod (801) is provided inside the motor driver (8), wherein the motor driver (8) is connected to the slide (7) via the switching coupling (803).

4. A jaw disengagement device for a trigger of a minimally invasive energy instrument according to claim 3, characterized in that: A locking slider (701) is arranged inside the slide (7), and the locking slider (701) is slidably connected to the slide (7) through a limiting slide rod (703). A transfer slide seat (702) is arranged at the bottom of the locking slider (701), and the transfer slide seat (702) is connected to the locking slider (701) through bolts. A slide groove seat (603) is arranged on the top of the tool rod pull block (6), and the clutch key lever (2) is located between the slide groove seat (603) and the transfer slide seat (702).

5. A jaw disengagement device for a trigger of a minimally invasive energy instrument according to claim 4, characterized in that: A clutch key block (201) is provided at one end of the clutch key lever (2), and the clutch key lever (2) is slidably connected to the slide slot seat (603) via the clutch key block (201); a mounting sleeve groove (602) is provided inside the tool rod pull block (6), and an integrally formed guide rod (601) is provided at the bottom of the tool rod pull block (6).

6. A jaw disengagement device for a trigger of a minimally invasive energy instrument according to claim 5, characterized in that: A clamp plate assembly (901) is provided at one end of the narrow-mouthed clamp (9), and a transition groove (902) is provided at the other end of the narrow-mouthed clamp (9), wherein the narrow-mouthed clamp (9) is connected to the outer tube (3) via the transition groove (902), and an inner tube is provided inside the outer tube (3), and the inner tube extends to the inside of the transition groove (902).

7. A jaw disengagement device for a trigger of a minimally invasive energy instrument according to claim 6, characterized in that: The narrow-mouth pliers (9) are provided with a contraction groove (908) inside, a return spring (903) is provided between the contraction groove (908) and the transfer rotation groove (902), a synchronization shaft (904) is provided inside the contraction groove (908), the synchronization shaft (904) is slidably connected to the contraction groove (908), two main connecting arms (905) are provided inside the synchronization shaft (904), one end of the main connecting arm (905) is rotatably connected to the synchronization shaft (904), wherein the other end of the main connecting arm (905) is provided with an expansion connecting arm (906), and the expansion connecting arm (906) is rotatably connected to the main connecting arm (905).

8. A jaw disengagement device for a trigger of a minimally invasive energy instrument according to claim 7, characterized in that: Bridge rods (907) are provided on both sides of one end of the expansion link arm (906), and the bridge rod (907) is rotatably connected to the expansion link arm (906). One end of the clamp plate assembly (901) is provided with a pointed jaw (9011), and the other end of the clamp plate assembly (901) is provided with a limiting center axis (909), wherein the limiting center axis (909) is connected to the narrow-mouth clamp (9) through a slot.

9. A jaw disengagement device for a trigger of a minimally invasive energy instrument according to claim 8, characterized in that: The clamp plate assembly (901) is slidably connected to the limiting central axis (909) via a support shaft (9013); side twist shafts (9012) are provided on both sides of the other end of the clamp plate assembly (901); the side twist shafts (9012) are rotatably connected to the bridge rod (907); and the inner tube is connected to the synchronous shaft (904).

10. A method for using a jaw detachment device for a minimally invasive energy instrument trigger, based on the jaw detachment device for a minimally invasive energy instrument trigger according to claim 9, characterized in that: The steps include: Step 1: When the clutch key lever (2) and the transfer slide (702) are in sliding engagement, the trigger assembly (102) is pressed, and the trigger drives the trigger slider to move through the lever principle, and the trigger slider is connected to the sliding module of the inner tube, causing the inner tube to move backward, driving the front end closable jaw to close; Step 2: When the clutch key lever (2) slides away from the transfer slide (702), the trigger and the jaws are disconnected, and the inner tube loses the linkage control of the trigger, and the inner tube resets forward, driving the front end of the closable jaws to open; Step 3: The front jaws can be disassembled and replaced, and then the narrow jaw clamp (9) is connected to the rotating groove (902) and the outer tube (3), and the inner tube is connected to the synchronous shaft (904), and the inner tube is used to realize the forward and backward sliding of the synchronous shaft (904).

Images