CN114305562A - Binding cutting structure of ligation device and automatic ligation cutting structure - Google Patents

Abstract

The invention provides a binding cutting structure of a loop ligature device and an automatic loop ligature cutting structure, comprising: a housing; the ring sleeve driving part can move along the front and back directions of the shell; the ring sleeve driving part is provided with a ring sleeve driving rack; the front end of the air suction pipe is sleeved with a pushing block, and the pushing block is connected with a ring sleeve driving part; the rear end of the tension spring is fixed; the rear end of the driving pull rod is connected with the front end of the tension spring, and a pull rod rack is also arranged on the rear end of the driving pull rod; the gear is movably arranged in the shell; the tightening pull rod can move along the front-back direction of the shell; the front end of the bundling line is tied with a slipknot to form a ring sleeve piece, and the ring sleeve piece is sleeved at the front end of the air suction pipe; the front end of the driving pull rod is provided with a driving drag hook, and the rear end of the tightening pull rod is provided with a tightening drag hook; the trigger is movably mounted inside the housing. According to the invention, the operations of tying the ligature and cutting the ligature are completed by starting the tying driving part, and sharp instruments are prevented from contacting the human body, so that the operation is safe.

Description

Tightening and cutting structure of ligation device and automatic ligation and cutting structure

technical field

The invention relates to the technical field of medical devices, in particular to a tightening and cutting structure of a ligation device and an automatic ligation and cutting structure.

Background technique

Automatic hemorrhoid ligation is one of the best non-surgical treatment methods for hemorrhoids at present. Hemorrhoids or the base of the hemorrhoid mucosa, block the blood supply of hemorrhoids or reduce venous backflow by tightening and strangling, reducing the congestion and hypertrophy of hemorrhoids or blood stasis, resulting in ischemia, atrophy, and necrosis, and the ligature tissue gradually It falls off, and the wound tissue repairs and heals. The ligation process is time-saving and labor-saving. It can be completed by one person without anesthesia. It can be followed with treatment, and the pain is mild. Complications are rare. It can bring great convenience for subsequent treatment. The current ligature stapler mainly relies on manual operation to tie the ligature wire and cut the ligature wire. How to design a ligation device that can tie the ligature wire and cut the ligature wire in the ligation operation. It is a problem that a person skilled in the art needs to solve by combining the operation of the operation and controlling it through a single switch, so as to achieve one-step operation, ensure the safety of the operation, and improve the efficiency of the operation.

SUMMARY OF THE INVENTION

In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a ligature cutting structure for a ligature device and an automatic ligation and cutting structure for the ligature device, which are used to solve the above problems in the prior art.

In order to achieve the above-mentioned purpose and other related purposes, the present invention provides an automatic ligation cutting structure of a ligation device, including:

case;

a suction pipe, which is arranged inside the casing, and the front end of the suction pipe penetrates the casing;

A tie rod is arranged inside the casing and can move along the front and rear directions of the casing;

a tightening driving component for driving the tightening rod to move backwards;

An elastic ligature wire, the front end of the ligature wire is tied with a slip knot to form a ring set, and the ring set is sleeved on the front end of the suction pipe; the rear end of the ligature wire is connected to the front end of the tie rod ;

a chopping board, which is arranged inside the casing and in front of the tightening rod;

The cutting knife is arranged inside the casing, the cutting knife includes a knife bar and a blade head, the knife bar can move along the front and rear directions of the shell, and the ligating wire passes through the cutting board and the cutting board. between the cutter bars; the blade head is arranged at the front end of the cutter bar, the blade head is in front of the anvil board, the blade head is bent and the end of the blade head faces the anvil board; The rear end of the knife bar is provided with a blocking piece, and the blocking piece is located on the path of the rearward movement of the tightening rod.

Preferably, the tightening drive component includes:

a tension spring, which is arranged inside the housing, and the rear end of the tension spring is fixed in position;

The driving rod is arranged inside the casing and can move along the front and rear directions of the casing, the rear end of the driving rod is connected with the front end of the tension spring, and the front end of the tightening rod is in the in front of the front end of the drive rod;

The front end of the driving rod is provided with a driving hook, the rear end of the fastening rod is provided with a fastening hook, and the fastening hook is arranged opposite to the driving hook;

a trigger, which is movably installed inside the casing;

When the tightening and cutting structure of the ligator is in the initial state, the trigger is pressed against the rear end of the driving rod, and the tension spring is stretched.

Preferably, the tightening and cutting structure of the ligation device further includes a support shaft arranged inside the casing; the support shaft is located between the anvil plate and the blade head, and the ligation wire After bypassing the support shaft, it penetrates between the cutting board and the cutter bar.

Preferably, the cutter bar is located between the suction pipe and the tightening rod.

Preferably, the cutter bar is arranged in parallel with the tightening rod.

When the tightening and cutting structure of the ligation device of the present invention is used, after the ring set covers the hemorrhoids, the tightening driving component drives the tightening rod to move backward, and then the tightening rod ties the ring set on the hemorrhoids tightly; then , the tie rod continues to move backward. After the tie rod is in contact with the blocking piece, since the blocking piece is on the path of the tie rod moving backwards, the tie rod pushes the blocking piece to move backwards, so that the blade head moves backwards. The blade head pushes the ligature wire to the cutting board to cut off the ligature wire. The invention can complete the operations of tying the ligature and cutting the ligature by activating the tightening driving component, thereby improving the operation efficiency. Since the cutting blade is arranged inside the casing, the tightening and cutting structure of the ligation device of the present invention can also prevent sharp instruments from contacting the human body, so as to ensure the safety of the operation.

The invention also relates to an automatic ligation and cutting structure of a ligation device, comprising a ring sleeve driving part and the ligation device's tightening and cutting structure;

A push block is sleeved at the front end of the suction pipe, and the push block is located behind the ring sleeve;

The ring-sleeve driving part is arranged inside the casing and can move along the front-rear direction of the casing; the ring-sleeve driving part is provided with a ring-sleeve driving rack on the outer surface;

The rear end of the driving rod is also provided with a rod rack;

a gear, which is movably arranged in the interior of the housing and between the tie rod rack and the ring sleeve driving rack;

When the automatic ligature cutting structure is in the initial state, the gear meshes with the tooth portion of the pull rod rack, the gear meshes with the tooth portion of the ring sleeve driving rack, and the pull rod rack is in the position In front of the driving rack of the ring sleeve, there is an initial interval between the tightening hook and the driving hook.

Preferably, the ring sleeve driving component includes: a driving positioning spring, a driving sliding block, a driven sliding block and a driven positioning spring;

The rear end of the driving positioning spring is fixed;

The driving slide block can move along the front and rear directions of the housing; the rear end of the driving slide block is connected with the front end of the driving positioning spring, and the ring-sleeve driving rack is arranged on the front end of the driving slide block. on the outside;

the driven slider can move along the front and rear directions of the housing, and the rear end of the driven slider is in contact with the front end of the driving slider;

The driven positioning spring is sleeved on the rear end of the driven slider and connected with the rear end of the driven slider, and the driven positioning spring is located between the suction pipe and the driving slider .

Further, the automatic ligation and cutting structure of the ligation device further includes: a trachea joint disposed inside the casing, the trachea joint disposed behind the suction pipe; the driving positioning spring and the The driving slider is sleeved on the air pipe joint, the rear end of the suction pipe is communicated with the air pipe joint, and the driven slider is arranged on the suction pipe.

Further, the central axis of the driving positioning spring is collinear with the central axis of the driven positioning spring.

Further, the central axis of the tension spring is parallel to the central axis of the driving slider.

When the automatic ligation and cutting structure of the ligation device of the present invention is used, the medical staff rotates the trigger so that the trigger no longer touches the rear end of the driving rod, and the restoring force of the tension spring drives the driving rod to move backwards, which drives the rod on the rod. The rack pushes the ring sleeve driving rack on the ring sleeve driving part through the gear, the ring sleeve driving part moves forward, the ring sleeve driving part drives the push block to move forward, and the push block pushes out the ring sleeve and takes out the hemorrhoid; After the kit takes the hemorrhoid, the restoring force of the tension spring will continue to drive the driving rod to move backwards, then the driving hook of the driving rod will pull the tensioning hook of the tensioning rod, and the tensioning rod will move backward with the driving rod, and the tensioning rod will be fastened. Tie the ring set over the hemorrhoids tightly; after the ring set ties the hemorrhoids, the driving rod drives the tie rod to move backwards. After the tie rod is in contact with the blocking piece, the blocking piece is on the path of the tie rod moving backwards. , the tie rod pushes the blocking piece to move backward, so that the blade head moves backward, and the blade head pushes the ligature wire to the cutting board to realize the cutting of the ligature wire. The present invention can control the three steps of pulling out the hemorrhoids, tying the hemorrhoids with the ring kit, and cutting the ligature wire by one trigger, and it can be done in one step, so that the operation process becomes fast; The operation of hemorrhoids is simplified; the invention is convenient for doctors to perform the operation calmly, reduces the operation time and reduces the complications; the automatic ligation and cutting structure of the ligator of the ligator of the invention is simple, convenient to use, safe and reliable.

Description of drawings

FIG. 1 shows a schematic structural diagram of the automatic ligation and cutting structure of the ligation device of the present embodiment in an initial state and without a casing.

FIG. 2 is a schematic diagram showing the structure of the automatic ligation cutting structure of the ligation device of the present embodiment when the first stage of firing is completed and the casing is not provided.

3 is a schematic diagram showing the structure of the automatic ligation cutting structure of the ligation device of the present embodiment when the second stage of firing is completed and the casing is not provided.

FIG. 4 is a schematic diagram showing the structure of the automatic ligation cutting structure of the ligation device of the present embodiment when the cutting knife cuts the ligation wire.

FIG. 5 is a schematic diagram showing the internal structure of the automatic ligation cutting structure of the ligation device of the present embodiment without a driving positioning spring, a driven positioning spring and a ligation wire.

Explanation of reference numerals

100 shells

110 Trigger

120 reels

200 Ring drive parts

210 Ring drive rack

220 Drive positioning spring

230 Drive Slider

240 driven slider

250 driven positioning spring

300 suction pipe

310 push block

400 tension spring

500 drive rod

510 Tie rod rack

520 drive hook

600 gear

700 Tie rod

710 Tie hook

800 sets of cable

810 Ring Kit

900 tracheal connector

20 cutting boards

30 cutting knives

31 Tool holder

32 Blade Head

33 Blocking sheet

40 Support shaft

Detailed ways

The embodiments of the present invention are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

Please see attached image. It should be noted that the structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the implementation of the present invention. Restricted conditions, it does not have technical substantive significance, any structural modification, proportional relationship change or size adjustment, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the present invention. The disclosed technical content must be within the scope of coverage. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used to limit this specification. The implementable scope of the invention, and the change or adjustment of the relative relationship thereof, shall also be regarded as the implementable scope of the present invention without substantially changing the technical content.

As shown in FIG. 1 to FIG. 5 , the automatic ligation cutting structure of the ligation device of the present embodiment includes:

housing 100;

The suction pipe 300 is arranged inside the casing 100, and the front end of the suction pipe 300 penetrates the casing 100;

The tightening rod 700 is arranged inside the casing 100 and can move along the front and rear directions of the casing 100;

The tightening driving part is used to drive the tightening rod 700 to move backward;

There is an elastic ligature wire 800, the front end of the ligature wire 800 is knotted to form a ring kit 810, and the ring kit 810 is sleeved on the front end of the suction pipe 300; the rear end of the ligature wire 800 is connected to the front end of the tie rod 700;

The cutting board 20 is arranged inside the casing 100 and is in front of the tightening rod 700;

The cutting knife 30 is arranged inside the casing 100 . The cutting knife 30 includes a knife bar 31 and a blade head 32 . The knife bar 31 can move along the front and rear directions of the housing 100 , and the ligature wire 800 passes through the cutting board 20 and the knife bar 31 The blade head 32 is arranged at the front end of the cutter bar 31, the blade head 32 is in front of the cutting board 20, the blade head 32 is bent and the end of the blade head 32 faces the cutting board 20; the rear end of the cutter rod 31 is provided with a blocking piece 33 , the blocking piece 33 is on the path of the rearward movement of the tightening rod 700 .

When the tightening cutting structure of the ligation device of the present invention is used, after the ring set 810 is wrapped around the hemorrhoids, the tightening driving component drives the tightening rod 700 to move backward, and the tightening rod 700 will cover the ring set 810 on the hemorrhoid. Then, the tie rod 700 continues to move backward. After the tie rod 700 is in contact with the blocking piece 33, since the blocking piece 33 is on the path of the tie rod 700 moving backward, the tie rod 700 pushes the blocking piece 33 toward the After moving backward, the blade head 32 moves backward, and the blade head 32 pushes the ligature wire 800 to the cutting board 20 to realize the cutting of the ligature wire 800 . In the present invention, the operation of tying the ligature wire 800 and cutting the ligature wire 800 can be completed by activating the tightening driving component, thereby improving the operation efficiency. Since the cutting blade 30 is disposed inside the housing 100, the tightening and cutting structure of the ligation device of the present invention can also prevent sharp instruments from contacting the human body, so as to ensure the safety of the operation.

Tie drive components include:

The tension spring 400 is arranged inside the housing 100, and the rear end of the tension spring 400 is fixed in position;

The driving rod 500 is arranged inside the casing 100 and can move along the front and rear directions of the casing 100 . in front of;

The front end of the driving pull rod 500 is provided with a driving pull hook 520, the rear end of the tightening pull rod 700 is provided with a tightening pull hook 710, and the tightening pull hook 710 is arranged opposite to the driving pull hook 520;

The trigger 110 is movably installed inside the housing 100;

When the tightening and cutting structure of the ligator is in the initial state, the trigger 110 is pressed against the rear end of the driving rod 500, and the tension spring 400 is stretched.

The medical staff turns the trigger 110 so that the trigger 110 no longer touches the rear end of the driving rod 500 , then the restoring force of the tension spring 400 drives the driving rod 500 to move backwards, and the driving hook 520 of the driving rod 500 is tightened with the tightening rod 700 After the pull hook 710 is in contact, the driving pull rod 500 drives the tightening pull rod 700 to move backward. The structure is simple and easy to control.

The tightening and cutting structure of the ligation device also includes a support shaft 40 disposed inside the casing 100; the support shaft 40 is located between the anvil 20 and the blade head 32, and the ligature wire 800 bypasses the support shaft 40 and then penetrates between the cutting board 20 and the cutter bar 31 . The arrangement of the support shaft 40 enables the ligation wire 800 to be in a tensioned state, which is convenient for the blade head 32 to cut the ligation wire 800 .

The automatic ligation cutting structure of the ligation device of the present embodiment includes the ring sleeve driving component 200 and the tightening and cutting structure of the ligation device;

The front end of the suction pipe 300 is sleeved with a push block 310, and the push block 310 is located behind the ring set 810;

The sleeve driving part 200 is arranged inside the casing 100 and can move along the front and rear directions of the casing 100; the outer surface of the sleeve driving part 200 is provided with a ring sleeve driving rack 210;

The rear end of the driving rod 500 is also provided with a rod rack 510;

The gear 600 is movably arranged inside the installation and the housing 100, and is between the tie rod rack 510 and the ring-sleeve driving rack 210;

When the automatic ligature cutting structure is in the initial state, the gear 600 meshes with the teeth of the pull rod rack 510 , the gear 600 meshes with the teeth of the loop drive rack 210 , and the pull rod rack 510 is in front of the loop drive rack 210 , there is an initial interval between the tightening hook 710 and the driving hook 520 .

When the automatic ligation and cutting structure of the ligation device of the present invention is used, the medical staff rotates the trigger 110 so that the trigger 110 no longer touches the rear end of the driving rod 500, and the restoring force of the tension spring 400 drives the driving rod 500 to move backwards. The pull rod rack 510 on the drive pull rod 500 pushes the loop drive rack 210 on the loop drive member 200 through the gear 600, then the loop drive member 200 moves forward, and the loop drive member 200 drives the push block 310 to move forward, The push block 310 pushes out the ring kit 810 to pull out the hemorrhoids, so far the automatic ligation and cutting structure has completed the first stage of firing; When the stage is complete, the tightening hook 710 is not in contact with the driving hook 520;

After the first stage of firing of the automatic ligature cutting structure is completed, the restoring force of the tension spring 400 will continue to drive the driving rod 500 to move backward, then the driving hook 520 of the driving rod 500 will pull the tightening hook 710 of the tightening rod 700 to tighten the The pull rod 700 moves backward along with the driving pull rod 500, and the tightening pull rod 700 will be wrapped around the hemorrhoid upper ring kit 810 and tightened. So far, the automatic ligation and cutting structure has completed the second stage of firing; When the stage is complete, the collar drives the rack 210 to disengage from the gear 600 .

After the ring kit 810 ties the hemorrhoids, the driving rod 500 drives the tie rod 700 to continue to move backwards. After the tie rod 700 contacts the blocking piece 33, since the blocking piece 33 is on the path of the backward movement of the tie rod 700, the tie rod 700 is fastened. The pulling rod 700 pushes the blocking piece 33 to move backward, so that the blade head 32 moves backward, and the blade head 32 pushes the ligature wire 800 to the anvil 20 to cut off the ligature wire 800 .

The present invention can control the three steps of taking out the hemorrhoids, tying the hemorrhoids with the ring set 810 and cutting the ligature wire 800 through a single trigger 110, which can be done in one step, making the operation process quicker; at the same time, the present invention is easy to operate with one hand, which is convenient to the doctor to simplify the operation of hemorrhoids;

The ring sleeve driving component 200 includes: a driving positioning spring 220, a driving sliding block 230, a driven sliding block 240 and a driven positioning spring 250;

The rear end of the driving positioning spring 220 is fixed;

The driving slider 230 can move along the front and rear directions of the housing 100; the rear end of the driving slider 230 is connected with the front end of the driving positioning spring 220, and the ring-sleeve driving rack 210 is arranged on the outer side of the driving slider 230;

The driven slider 240 can move along the front-rear direction of the housing 100, and the rear end of the driven slider 240 is in contact with the front end of the driving slider 230;

The driven positioning spring 250 is sleeved on the rear end of the driven sliding block 240 and connected to the rear end of the driven sliding block 240 , and the driven positioning spring 250 is located between the suction pipe 300 and the driving sliding block 230 .

The pull rod rack 510 on the drive pull rod 500 pushes the ring sleeve drive rack 210 on the outer side of the drive slider 230 through the gear 600 to move, then the drive positioning spring 220 is stretched, the drive slider 230 moves forward, and the drive slider 230 pushes the driven sliding block 240 to move forward, and the driving sliding block 230 pushes the driven positioning spring 250 to compress, the driven sliding block 240 drives the pushing block 310 to move forward, and the pushing block 310 pushes out the ring set 810 . After the pull rod rack 510 is disengaged from the gear 600 , the restoring force of the driving positioning spring 220 drives the driving sliding block 230 to move backward and reset, and the restoring force of the driven positioning spring 250 drives the driven sliding block 240 to move backward and reset.

The automatic ligation and cutting structure of the ligation device further includes: a tracheal joint 900 arranged inside the casing 100, the tracheal joint 900 is arranged behind the suction pipe 300; the driving positioning spring 220 and the driving slider 230 are sleeved on the tracheal joint 900 Above, the rear end of the air intake pipe 300 is communicated with the air pipe joint 900 , and the driven slider 240 is arranged on the air intake pipe 300 . This structure facilitates the installation of the driving positioning spring 220 and the driving sliding block 230 , and facilitates the driving of the sliding block 230 to push the driven sliding block 240 to move stably.

The cutter bar 31 is located between the suction pipe 300 and the tightening rod 700 . This structure enables the driving rod 500 to drive the tightening rod 700 to move backwards without being disturbed by the knife rod 31 until it hits the blocking piece 33 .

In order to make the internal structure of the automatic ligature cutting structure more compact, the central axis of the driving positioning spring 220 and the central axis of the driven positioning spring 250 are collinear. The trigger 110 is below the driving rod 500 , the driving rod 500 is below the tightening rod 700 , and the tightening rod 700 is below the suction pipe 300 . The cutter bar 31 is arranged in parallel with the tightening rod 700 . The trigger 110 is movably connected with the housing 100 through the rotating shaft 120 .

The central axis of the tension spring 400 is parallel to the central axis of the driving slider 230 . The central axis of the tension spring 400 is parallel to the longitudinal direction of the driving rod 500 , and the longitudinal direction of the driving rod 500 is the front-rear direction of the driving rod 500 . With this structure, the restoring force of the tension spring 400 can stably drive the driving rod 500 to move, and the driving rod 500 can stably drive the driving slider 230 to move.

The invention is convenient for doctors to carry out the operation calmly, reduces the operation time and reduces the complications; the automatic ligation cutting structure of the ligation device of the ligation device of the invention is simple, convenient to use, safe and reliable.

In conclusion, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present invention should still be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a tight cutting structure of ligation device which characterized in that includes:

a housing (100);

an air suction pipe (300) provided inside the casing (100), a front end of the air suction pipe (300) penetrating the casing (100);

a tightening rod (700) which is provided inside the housing (100) and is movable in the front-rear direction of the housing (100);

a tightening driving part for driving the tightening rod (700) to move backward;

the elastic ligature (800), the front end of the ligature (800) is tied with a slipknot to form a ring external member (810), and the ring external member (810) is sleeved at the front end of the air suction pipe (300); the rear end of the bundling wire (800) is connected with the front end of the bundling pull rod (700);

an anvil (20) disposed inside the housing (100) and in front of the tightening rod (700);

the cutting knife (30) is arranged inside the shell (100), the cutting knife (30) comprises a knife bar (31) and a blade head (32), the knife bar (31) can move along the front-back direction of the shell (100), and the ligature (800) penetrates between the chopping board (20) and the knife bar (31); the blade head (32) is arranged at the front end of the cutter bar (31), the blade head (32) is positioned in front of the anvil plate (20), the blade head (32) is bent, and the end part of the blade head (32) faces the anvil plate (20); the rear end of the cutter bar (31) is provided with a blocking sheet (33), and the blocking sheet (33) is positioned on a path of the backward movement of the tightening pull rod (700).

2. The cinching and cutting structure of a ligation device according to claim 1, wherein: the tightening drive member includes:

the tension spring (400) is arranged in the shell (100), and the rear end of the tension spring (400) is fixed;

the driving pull rod (500) is arranged in the shell (100) and can move along the front-back direction of the shell (100), the rear end of the driving pull rod (500) is connected with the front end of the tension spring (400), and the front end of the tightening pull rod (700) is positioned in front of the front end of the driving pull rod (500);

the front end of the driving pull rod (500) is provided with a driving drag hook (520), the rear end of the tightening pull rod (700) is provided with a tightening drag hook (710), and the tightening drag hook (710) is opposite to the driving drag hook (520);

a trigger (110) movably mounted inside the housing (100);

when the tightening and cutting structure of the ligation device is in an initial state, the trigger (110) abuts against the rear end of the driving pull rod (500), and the tension spring (400) stretches.

3. A binding and cutting structure of a ligation device according to claim 1 or 2, wherein: a support shaft (40) provided inside the housing (100); the supporting shaft is arranged between the cutting board (20) and the blade head (32), and the bundling wire (800) passes through the position between the cutting board (20) and the cutter bar (31) after bypassing the supporting shaft (40).

4. A binding and cutting structure of a ligation device according to claim 1 or 2, wherein: the cutter bar (31) is arranged between the air suction pipe (300) and the tightening pull rod (700).

5. A binding and cutting structure of a ligation device according to claim 1 or 2, wherein: the cutter bar (31) and the tightening pull rod (700) are arranged in parallel.

6. The utility model provides an automatic ligation cutting structure of ligation device which characterized in that: a cinching cutter structure comprising a loop driver member (200) and a ligation device according to claim 2;

the front end of the air suction pipe (300) is sleeved with a pushing block (310), and the pushing block (310) is positioned behind the ring sleeve piece (810);

the loop driving member (200) is arranged inside the shell (100) and can move along the front and back directions of the shell (100); a ring sleeve driving rack (210) is arranged on the outer side surface of the ring sleeve driving part (200);

a pull rod rack (510) is also arranged at the rear end of the driving pull rod (500);

the gear (600) is movably arranged inside the shell (100) and is positioned between the pull rod rack (510) and the ring sleeve driving rack (210);

when the automatic ligation and cutting structure is in an initial state, the gear (600) is meshed with the tooth part of the pull rod rack (510), the gear (600) is meshed with the tooth part of the ring sleeve driving rack (210), the pull rod rack (510) is located in front of the ring sleeve driving rack (210), and an initial interval is reserved between the tightening draw hook (710) and the driving draw hook (520).

7. The automatic ligation cutting structure of a ligation device according to claim 6, wherein:

the collar drive member (200) includes: the device comprises a driving positioning spring (220), a driving sliding block (230), a driven sliding block (240) and a driven positioning spring (250);

the rear end of the driving positioning spring (220) is fixed;

the driving slider (230) is movable in the front-rear direction of the housing (100); the rear end of the driving sliding block (230) is connected with the front end of the driving positioning spring (220), and the ring sleeve driving rack (210) is arranged on the outer side face of the driving sliding block (230);

the follower slider (240) is movable in the front-rear direction of the housing (100), and the rear end of the follower slider (240) is in contact with the front end of the drive slider (230);

the driven positioning spring (250) is sleeved at the rear end of the driven sliding block (240) and connected with the rear end of the driven sliding block (240), and the driven positioning spring (250) is located between the air suction pipe (300) and the driving sliding block (230).

8. The automatic ligation cutting structure of a ligation device according to claim 7, wherein: further comprising: the air pipe joint (900) is arranged in the shell (100), and the air pipe joint (900) is arranged behind the air suction pipe (300); the air pipe connector (900) is sleeved with the driving positioning spring (220) and the driving sliding block (230), the rear end of the air suction pipe (300) is communicated with the air pipe connector (900), and the driven sliding block (240) is arranged on the air suction pipe (300).

9. The automatic ligation cutting structure of a ligation device according to claim 8, wherein: the central axis of the driving positioning spring (220) is collinear with the central axis of the driven positioning spring (250).

10. The automatic ligation cutting structure of a ligation device according to claim 7, wherein: the central axis of the tension spring (400) is parallel to the central axis of the driving sliding block (230).

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