Continuous ligator

Abstract

This invention provides a continuous ligation device, comprising: an inner tube with a gas flow channel in its middle, a plurality of ligation rings that can be fitted onto the distal end of the inner tube, and a negative pressure device connected to the proximal end of the inner tube; a pushing member disposed on the outside of the inner tube and slidably connected to the inner tube, for pushing the ligation rings off the inner tube, the pushing member having a trigger portion; a housing, the inner tube being fixedly connected to the housing; and a pushing mechanism disposed on the housing, the pushing mechanism interacting with the trigger portion under external force, causing the pushing member to move a distance toward the distal end of the inner tube to push off the ligation rings. The pushing mechanism of this continuous ligation device can drive the pushing member to push off one ligation ring at a time under external force, thereby achieving continuous ligation of the ligation rings and improving surgical efficiency.

Description

Technical Field

[0001] This invention relates to the field of hemorrhoid treatment devices, and more particularly to a continuous ligation device. Background Technology

[0002] Hemorrhoid banding is a common treatment for hemorrhoids. The principle involves placing a specially designed rubber band around the base of the internal hemorrhoid. The elastic recoil of the band blocks the blood supply to the hemorrhoid, causing it to necrose, shrink, and fall off, thus achieving the therapeutic goal. However, current banding devices typically only allow for the banding of a single band at a time, and the band needs to be refilled after each use, which is time-consuming and labor-intensive. Summary of the Invention

[0003] This invention provides a continuous ligation device to solve the problem that existing ligation devices can only load a single rubber band at a time, resulting in low surgical efficiency.

[0004] In this embodiment of the invention, the continuous ligation device includes:

[0005] The inner tube has a gas flow channel in the middle, and multiple rubber rings can be fitted on the far end of the inner tube. The proximal end of the inner tube is used to connect to a negative pressure device.

[0006] A pusher is disposed on the outside of the inner tube and slidably connected to the inner tube, used to push the ferrule to fall off the inner tube, and a trigger portion is formed on the pusher;

[0007] The inner tube is fixedly connected to the housing.

[0008] A pushing mechanism is disposed on the housing. The pushing mechanism can interact with the triggering part under the action of external force, so that the pushing member moves a distance towards the far end of the inner tube to push off the ferrule.

[0009] As a further optional embodiment of the continuous banding device, the multiple triggering parts are evenly spaced. The continuous banding device also includes a reset component, which is used to drive the pushing mechanism to reset after the external force is removed. Under the alternating action of the external force and the reset component, the pushing mechanism can perform a triggering process that drives the pushing member to move a preset distance to the distal end of the inner tube and a reset process that returns to the initial position.

[0010] As a further optional embodiment of the continuous bandaging device, the pushing mechanism includes a trigger button and a latch for moving the trigger button. The trigger button and the latch are movably connected. The reset assembly includes a first reset assembly for resetting the latch and a second reset assembly for resetting the trigger button. A limiting structure is formed on the trigger button and / or the latch. During the triggering process, the trigger button remains relatively stationary with respect to the latch due to the limiting structure, thereby driving the pushing member to move. During the reset process, the trigger button moves relative to the latch and resets under the combined action of the trigger part and the second reset assembly, thereby avoiding the trigger part.

[0011] As a further optional embodiment of the continuous banding device, the trigger button is rotatably connected to the handle, and the handle is rotatably connected to the housing. During the triggering process, the handle rotates under the action of an external force, causing the trigger button to rotate. The upper part of the trigger button pushes the trigger part to move until the trigger button and the trigger part disengage. During the reset process, the handle and the trigger button swing back to their original positions. During the reset process, the trigger button is pushed by the trigger part and rotates relative to the handle, thereby avoiding the trigger part.

[0012] As a further alternative to the continuous bandaging device, the top of the handle is provided with a groove that opens upward and to the side, the bottom of the trigger button is located in the groove, and the sidewall of the groove constitutes the limiting structure.

[0013] As a further alternative to the continuous banding device, a magnet is provided on the trigger button and the side wall of the groove, and the magnet constitutes the second reset component.

[0014] As a further alternative to the continuous banding device, the first reset component is configured as a spring, with one end of the spring connected to the handle and the other end connected to the housing.

[0015] As a further alternative to the continuous ligation device, a limiting element is provided on the housing, the limiting element being disposed on the path of the pusher moving toward the proximal end of the inner tube, such that the pusher can only move to a position at a predetermined distance from the proximal end of the inner tube.

[0016] As a further optional embodiment of the continuous ligation device, a drug solution chamber isolated from the gas flow channel is also provided in the middle of the inner tube. The drug solution chamber has a first opening at the distal end of the inner tube and a second opening at the proximal end of the inner tube. The first opening is used to draw in and dispense the drug solution, and a piston assembly is provided at the second opening. The piston assembly is fixedly connected to the pusher and can move with the pusher.

[0017] As a further optional embodiment of the continuous ligation device, a rubber ring support is provided at the distal end of the inner tube, the rubber ring support is sleeved on the outside of the inner tube, the ligation rubber ring is sleeved on the rubber ring support, and the end of the rubber ring support is provided with an anti-slip protrusion and / or the surface of the rubber ring support is provided with a number of grooves to increase friction.

[0018] Implementing the embodiments of the present invention will have the following beneficial effects:

[0019] The distal end of the inner tube of this continuous ligation device can be fitted with multiple ligation rings. The inner tube, together with the external negative pressure device, adsorbs the hemorrhoids. The pushing mechanism can drive the pusher to push off one ligation ring at a time under the action of external force, thereby realizing continuous ligation of the ligation rings and improving surgical efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] in:

[0022] Figure 1 This is a schematic diagram of the overall structure of the continuous ligation device in one embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the continuous ligation device in one embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of a continuous ligation device according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the pushing mechanism in one embodiment of the present invention;

[0026] Explanation of key component symbols:

[0027] 10-Inner tube, 11-Gas flow channel, 12-Medicine chamber, 13-Piston assembly, 131-Piston, 132-Piston push rod, 14-Negative pressure adapter, 15-Evacuation pipe, 16-Adapter bracket;

[0028] 20 - Pushing component, 21 - Triggering part;

[0029] 30 - Housing, 31 - Left housing, 32 - Right housing, 33 - Handle;

[0030] 40 - Push mechanism, 41 - Trigger button, 42 - Handle, 421 - Limiting structure;

[0031] 51-First reset assembly, 511-Spring, 52-Second reset assembly, 521-Magnet;

[0032] 60-Rubber ring bracket, 61-Anti-slip protrusion, 70-Rubber ring, 80-Medicine bottle. Detailed Implementation

[0033] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] This invention provides a continuous ligation device to solve the problem that existing ligation devices can only load a single rubber band at a time, resulting in low surgical efficiency.

[0037] In the embodiments of the present invention, please refer to the references. Figures 1 to 4 The continuous banding device includes an inner tube 10, a pusher 20, a housing 30, and a pushing mechanism 40.

[0038] The inner tube 10 is fixedly connected to the housing 30. A gas flow channel 11 is provided in the middle of the inner tube 10. Multiple ligature rings 70 can be fitted onto the distal end (the end away from the user) of the inner tube 10, and the proximal end (the end closer to the user) of the inner tube 10 is used to connect to a negative pressure device. A pusher 20 is disposed on the outside of the inner tube 10 and is slidably connected to the inner tube 10. The pusher 20 is used to push the ligature rings 70 off the inner tube 10, and a trigger part 21 is formed on the pusher 20. A pushing mechanism 40 is disposed on the housing 30. The pushing mechanism 40 can interact with the trigger part 21 under the action of external force, causing the pusher 20 to move a certain distance toward the distal end of the inner tube 10 to push off the ligature rings 70.

[0039] It should be noted that the pusher 20 can be a rod-shaped element, a tubular element, or an element of other shapes. Its core function is to move along the inner tube 10 and push down the sleeve rubber ring 70. In the case where the pusher 20 is set as a tube, the pusher 20 is sleeved on the outside of the inner tube 10, and the inner tube 10 and the tube body of the pusher 20 themselves constitute a guide structure that guides the pusher 20 to move in a fixed direction on the inner tube 10. In the case where the pusher 20 is set as a non-tubular element, a guide structure such as a slide rail or a groove needs to be formed on the pusher 20 and / or the inner tube 10 to limit the movement direction of the pusher 20. The trigger part 21 can be a number of protrusions formed on the surface of the pusher 20, or it can be formed by recessing the surface of the pusher 20 (here, the trigger part 21 refers to the spacer between the grooves), or it can be a threaded structure formed on the surface of the pusher 20. The threaded structure can be convex or concave.

[0040] The continuous ligation device operates as follows: The inner tube 10 is aligned with the hemorrhoid. The negative pressure device is activated, creating negative pressure within the gas flow channel 11. The hemorrhoid is at least partially drawn into the inner tube 10. The user applies external force to the pushing mechanism 40, which drives the pushing member 20 to move a distance towards the distal end of the inner tube 10, thus pushing down the next ligation ring 70. After the ligation ring 70 falls off, it contracts due to its elasticity, thereby tightening the base of the hemorrhoid, completing the ligation. It is understood that only one ligation ring 70 is needed for each hemorrhoid.

[0041] The distal end of the inner tube 10 of the continuous ligation device can be fitted with multiple ligation rubber rings 70. The inner tube 10, together with the external negative pressure device, adsorbs the hemorrhoids. The pushing mechanism 40 can drive the pushing component 20 to push off one ligation rubber ring 70 at a time under the action of external force, thereby realizing the continuous ligation of the ligation rubber rings 70 and improving the efficiency of the operation.

[0042] In one embodiment, a plurality of triggering parts 21 are evenly spaced, and the continuous banding device also includes a reset component. The reset component is used to drive the pushing mechanism 40 to reset after the external force is removed. Under the alternating action of the external force and the reset component, the pushing mechanism 40 can perform a triggering process to drive the pushing member 20 to move a preset distance to the far end of the inner tube 10 and a reset process to return to the initial position.

[0043] In one specific embodiment, the pushing mechanism 40 includes a trigger button 41 and a handle 42 for driving the trigger button 41 to move. The trigger button 41 and the handle 42 are movably connected. The reset component includes a first reset component 51 for driving the handle 42 to reset and a second reset component 52 for driving the trigger button 41 to reset. A limiting structure 421 is formed on the trigger button 41 and / or the handle 42. During the triggering process, the trigger button 41 remains relatively stationary with respect to the handle 42 due to the action of the limiting structure 421, thereby driving the pusher 20 to move. During the reset process, the trigger button 41 moves relative to the handle 42 and resets under the combined action of the trigger part 21 and the second reset component 52, thereby avoiding the trigger part 21.

[0044] In a more specific embodiment, please refer to Figure 3 The trigger button 41 is rotatably connected to the handle 42, and the handle 42 is rotatably connected to the housing 30. During the triggering process, the handle 42 rotates under the action of external force, causing the trigger button 41 to rotate. The upper part of the trigger button 41 pushes the trigger part 21 to move until the trigger button 41 and the trigger part 21 are disengaged. During the reset process, the handle 42 and the trigger button 41 swing back to reset under the action of the first reset assembly 51. During the reset process, the trigger button 41 is pushed by the trigger part 21 and rotates relative to the handle 42, thereby avoiding the trigger part 21.

[0045] In this embodiment, as the handle 42 is repeatedly engaged, the pusher 20 gradually moves toward the distal end of the inner tube 10 until all the ligating rings 70 are pushed off, and the end of the pusher 20 is flush with the end of the inner tube 10. At this point, the ligating rings 70 need to be refilled so that the continuous ligator can be used in subsequent surgeries. During refilling, the handle 42 is engaged to its limit position, the trigger button 41 disengages from the trigger part 21, and the pusher 20 is pushed toward the proximal end of the inner tube 10, thus exposing the distal end of the inner tube 10 for refilling the ligating rings 70.

[0046] To prevent the pusher 20 from being pushed too far during the filling process, in a further specific embodiment, a limiting element is provided on the housing 30. The limiting element is located on the movement path of the pusher 20 toward the proximal end of the inner tube 10, so that the pusher 20 can only move to a position at a predetermined distance from the proximal end of the inner tube 10.

[0047] Setting a limiting element can prevent the pusher 20 from moving too far towards the proximal end of the inner tube 10, causing the trigger part 21 to move away from above the trigger button 41 and become unusable.

[0048] For ease of installation, in a further specific embodiment, pin holes are provided at corresponding positions on the housing 30, the handle 42, and the trigger button 41. A pin passes through the pin hole to complete the connection between the housing 30, the handle 42, and the trigger button 41. In this embodiment, the rotation centers of the trigger button 41 and the handle 42 are the same, making installation more convenient. In other specific embodiments, the rotation centers of the trigger button 41 and the handle 42 can be set differently. The pin can also be replaced by a post extending from the surface of the housing 30.

[0049] In a further specific embodiment, a trigger button 41 is disposed at the top of a latch 42, and a boss is formed at the top of the latch 42. The boss is located on the side of the trigger button 41 near the proximal end of the inner tube 10. The boss constitutes a limiting structure 421, so that the trigger button 41 can only rotate relative to the latch 42 during the reset process.

[0050] In a further specific embodiment, a magnet 521 is provided on the surface of the trigger button 41 opposite to the boss, and the two magnets 521 constitute the second reset assembly 52.

[0051] In another more specific embodiment, the top of the handle 42 is provided with a groove that opens upward and to the side, the bottom of the trigger button 41 is located in the groove, and the surrounding wall of the groove forms a limiting structure 421.

[0052] In a further specific embodiment, a magnet 521 is provided on the side of the trigger button 41 and the groove, and the magnet 521 constitutes the second reset component 52.

[0053] It is understandable that in the above embodiments, the magnet 521 can be replaced by a spring, which can also achieve the same reset effect.

[0054] In a further specific embodiment, the first reset component 51 is configured as a spring 511, one end of which is connected to the handle 42 and the other end to the housing 30. It is understood that the spring 511 can be replaced by magnets respectively disposed on the handle 42 and the housing 30.

[0055] In order to prevent the spring 511 from bending radially during movement and affecting the reset effect, in a further specific embodiment, the housing 30 is provided with a receiving groove with openings at both ends, and the spring 511 is disposed in the receiving groove, with the surrounding wall of the receiving groove in contact with the side of the spring 511.

[0056] In a more specific embodiment, please refer to Figure 4The handle 42 is slidably connected to the housing 30. The movement direction of the handle 42 is along the axis of the inner tube 10, that is, the handle 42 can reciprocate towards the distal end and towards the proximal end. A spring serving as the first reset component 51 is provided between the handle 41 and the housing 30. A longitudinally extending groove is provided at the top of the handle 42. The trigger button 41 is slidably connected to the groove. A spring serving as the second reset component 52 is also provided in the groove. One end of the spring is fixedly connected to the bottom surface of the groove, and the other end is fixedly connected to the trigger button 41. The trigger button 41 can move translatively along the groove. The top of the trigger button 41 is provided with a vertical surface and an inclined surface. The vertical surface is used to abut against the trigger part 21 during the triggering process, and the inclined surface is used to abut against the trigger part 21 during the trigger reset process. During the triggering process, since the contact surface between the trigger button 41 and the trigger part 21 is a vertical surface, the force exerted by the trigger part 21 on the trigger button 41 is a horizontal force. The trigger button 41 will not move down along the slide groove, thus pushing the trigger part 21. This vertical surface and the wall of the slide groove constitute a limiting structure 421. During the resetting process, due to the presence of the inclined surface, the force exerted by the trigger part 21 on the trigger button 41 can generate a downward component force, causing the trigger button 41 to move down along the slide groove, thereby avoiding the trigger part 21. For this continuous sleeve tube, the movement distance of the pushing mechanism 40 determines the movement distance of the pushing member 20. Therefore, in this embodiment, it is necessary to set a limiting structure such as a column or plate on the housing 30 along the movement direction of the handle 42 to limit its movement distance and ensure that the pushing member 20 pushes down one sleeve rubber ring 70 each time.

[0057] In one embodiment, the trigger button 41 is rotatably connected to the handle 42, and the handle 42 is slidably connected to the housing 30. The specific solution is a combination of the relevant elements of the two embodiments mentioned above, which will not be described in detail here.

[0058] In one embodiment, the housing 30 includes a left housing 31 and a right housing 32, which are connected to form a receiving space. The inner tube 10 and the pusher 20 are partially located within this receiving space. The trigger button 41, the first reset assembly 51, and the second reset assembly 52 are completely located within this receiving space. The lower part of the handle 42 extends out of the housing 30. A handle 33 is formed at one end of the housing 30 to facilitate one-handed operation by the user. A suction tube 15 is connected to the end of the gas flow channel 11 via an adapter bracket 16 and extends to a negative pressure adapter 14 located at the end of the handle 33. The negative pressure adapter 14 is used to connect a negative pressure device.

[0059] In the context of the above implementation scheme, if the handle 42 is slidably connected to the housing 30, since the movement direction of the handle 42 during the triggering process is the same as the movement direction of the pusher 20, the handle 33 should be positioned closer to the far end relative to the handle 42. However, this gripping method does not conform to the usage habits of most people. The scheme where the handle 42 is rotatably connected to the housing 30 does not have the above problem. In addition, when the trigger button 41 is enclosed inside the housing 30, and the handle 42 is slidably connected to the housing 30 (the trigger button 41 and the handle 42 are slidably or rotatably connected), during reloading, the pusher 20 moves to the proximal end. At this time, the trigger button 41 cannot be repositioned, and the housing 30 needs to be disassembled to move the trigger button 41 so that the pusher 20 can move to the proximal end. This is undoubtedly more complicated in operation. At this time, a small window can be opened on the housing 30 near the trigger button 41, and a movable door can be set on the small window, which can be opened or closed by the user; or, a small window can be opened on the housing 30 near the trigger button 41, and a movable door can be set on the small window, which can be opened or closed by the user. A groove is provided on the housing 30, which runs through its surface. The extension direction of the groove is the same as the movement direction of the trigger button 41 when it moves to avoid a position. Specifically, when the trigger button 41 and the handle 42 are slidably connected, the groove is a straight groove. When the trigger button 41 and the handle 42 are rotatably connected, the groove is an arc-shaped groove. A slider is fixed on the trigger button 41. The slider is slidably connected in the groove and a part of it protrudes outside the housing 30. When the rubber ring 70 needs to be refilled, the user can pull down the slider along the groove to make the trigger button 41 avoid the trigger part 21.

[0060] In one embodiment, the triggering parts 21 are evenly spaced, and the pushing mechanism 40 includes a gear meshing with the triggering parts 21 and a gear handle fixedly connected to the gear pivot. The gear is rotatably connected to the housing 30. By rotating the gear handle, the gear can be driven to rotate, thereby pushing the pushing member 20 to move to the distal end. By rotating the gear handle in the opposite direction, the pushing member 20 can be reset, thereby refilling the sealing ring 70.

[0061] In one embodiment, a liquid medicine chamber 12 isolated from the gas flow channel 11 is also provided in the middle of the inner tube 10. The liquid medicine chamber 12 has a first opening at the far end of the inner tube 10 and a second opening at the near end of the inner tube 10. The first opening is used to draw in and dispense liquid medicine. A piston assembly 13 is provided at the second opening. The piston assembly 13 is fixedly connected to the pusher 20 and can move with the pusher 20. Specifically, the piston assembly 13 includes a piston 131 and a piston push rod 132. The piston 131 is sealed to the wall of the liquid medicine chamber 12. One end of the piston push rod 132 is fixedly connected to the piston 131 and the other end is fixedly connected to the pusher 20.

[0062] In this embodiment, the continuous ligation device is used as follows: Before surgery, the opening of the medicine bottle 80 is aligned with the first opening, and the pusher 20 is pushed to move towards the proximal end of the inner tube 10. The pusher 20 drives the piston assembly 13 to move, drawing the liquid medicine from the medicine bottle 80 into the liquid medicine chamber 12. Then, a rubber ring is fitted onto the distal end of the inner tube 10, completing the filling process. During surgery, as the handle 42 is pulled, the pusher 20 drives the piston 131, and the liquid medicine in the liquid medicine chamber 12 is pushed out, thus allowing the medication to be applied simultaneously with ligation. The medication can be an anti-inflammatory solution or a disinfectant, depending on the surgical requirements.

[0063] In one embodiment, a rubber ring bracket 60 is provided at the distal end of the inner tube 10. The rubber ring bracket 60 is sleeved on the outside of the inner tube 10, and a rubber ring 70 is sleeved on the rubber ring bracket 60. An anti-slip protrusion 61 is provided at the end of the rubber ring bracket 60 to prevent the rubber ring 70 from falling off during non-sleeving process.

[0064] In one specific embodiment, the surface of the rubber ring bracket 60 is provided with a plurality of grooves to increase friction.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A continuous ligation device, characterized in that, include: The inner tube has a gas flow channel in the middle, and multiple rubber rings can be fitted on the far end of the inner tube. The proximal end of the inner tube is used to connect to a negative pressure device. A pusher is disposed on the outside of the inner tube and slidably connected to the inner tube, used to push the ferrule to fall off the inner tube, and a trigger portion is formed on the pusher; The inner tube is fixedly connected to the housing. A pushing mechanism is disposed on the housing. The pushing mechanism can interact with the triggering part under the action of external force, so that the pushing member moves a distance to the far end of the inner tube to push off the ferrule. The multiple triggering parts are evenly spaced, and the continuous banding device also includes a reset component. The reset component is used to drive the pushing mechanism to reset after the external force is removed. Under the alternating action of the external force and the reset component, the pushing mechanism can perform a triggering process that drives the pushing member to move a preset distance to the far end of the inner tube and a reset process that returns to the initial position. The pushing mechanism includes a trigger button and a latch for driving the trigger button to move. The trigger button and the latch are movably connected. The reset component includes a first reset component for driving the latch to reset and a second reset component for driving the trigger button to reset. A limiting structure is formed on the trigger button and / or the latch. During the triggering process, the trigger button remains relatively stationary with respect to the latch due to the limiting structure, thereby driving the pushing member to move. During the reset process, the trigger button resets after moving relative to the latch under the combined action of the trigger part and the second reset component, thereby avoiding the trigger part.

2. The continuous ligation device according to claim 1, characterized in that, The trigger button is rotatably connected to the handle, and the handle is rotatably connected to the housing. During the triggering process, the handle rotates under the action of an external force, causing the trigger button to rotate. The upper part of the trigger button pushes the trigger part to move until the trigger button and the trigger part disengage. During the reset process, the handle and the trigger button swing back to their original positions. During the reset process, the trigger button is pushed by the trigger part and rotates relative to the handle, thereby avoiding the trigger part.

3. The continuous ligation device according to claim 2, characterized in that, The top of the handle is provided with a groove that opens upwards and to the side, the bottom of the trigger button is located in the groove, and the sidewall of the groove constitutes the limiting structure.

4. The continuous ligation device according to claim 3, characterized in that, The trigger button and the side wall of the groove are provided with magnets, and the magnets constitute the second reset component.

5. The continuous ligation device according to claim 1, characterized in that, The first reset component is configured as a spring, with one end of the spring connected to the handle and the other end connected to the housing.

6. The continuous ligation device according to claim 1, characterized in that, The housing is provided with a limiting element, which is located on the path of the pusher moving toward the proximal end of the inner tube, so that the pusher can only move to a position at a predetermined distance from the proximal end of the inner tube.

7. The continuous ligation device according to any one of claims 1-6, characterized in that, The inner tube also has a liquid medicine chamber in the middle that is isolated from the gas flow channel. The liquid medicine chamber has a first opening at the far end of the inner tube and a second opening at the near end of the inner tube. The first opening is used to draw in and dispense liquid medicine. A piston assembly is provided at the second opening. The piston assembly is fixedly connected to the pusher and can move with the pusher.

8. The continuous ligation device according to claim 1, characterized in that, The distal end of the inner tube is provided with a rubber ring bracket, which is sleeved on the outside of the inner tube. The rubber ring is sleeved on the rubber ring bracket. The end of the rubber ring bracket is provided with an anti-slip protrusion and / or the surface of the rubber ring bracket is provided with a number of grooves to increase friction.

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