Ligation device capable of pushing and tightening elastic thread
By designing a ligator that can push and tighten elastic thread, and using a movable handle to control the pushing and tightening mechanism, the problem of the lack of automatic tightening in ligators is solved, achieving precise control and simple operation, and improving ligation efficiency and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SURGAID MEDICAL XIAMEN CO LTD
- Filing Date
- 2023-12-26
- Publication Date
- 2026-04-28
AI Technical Summary
Existing ligation devices lack automatic suture tightening function, making it difficult to accurately control the suture length, which affects the stability and efficiency of the operation.
Design a tying device that can push and tighten elastic thread. The pushing and tightening mechanism is controlled by a firing handle to achieve precise tying and tightening of elastic thread. The combination of a limiting groove and a reset mechanism ensures the accuracy and ease of operation.
It enables simple and quick suture pushing and tightening operations, precise control of suture length, improved surgical efficiency and stability, and its structure is easy to implement and quantify.
Smart Images
Figure CN224166353U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical devices, and in particular to a ligation device that can push and tighten elastic threads. Background Technology
[0002] The current conventional treatment for hemorrhoids is the banding and anastomosis therapy. This therapy requires the use of a banding device. During the procedure, the attending physician holds the banding device with one hand, aligns the head of the device with the hemorrhoid to be treated, and uses negative pressure suction to draw the hemorrhoid into the head of the banding device. The device is then activated, and a rubber band or elastic thread is used to ligate the base of the hemorrhoid, cutting off its blood supply. This causes the hemorrhoid to become ischemic, necrotic, and fall off naturally, achieving the therapeutic goal. The entire process does not require surgery, has a small incision, and is time-saving, labor-saving, and easy to use, with relatively low costs.
[0003] The ligation device mainly includes a negative pressure tube and a push tube. A rubber ring or elastic thread is fitted onto the negative pressure tube, and the rubber ring or elastic thread is detached from the negative pressure tube by controlling the push tube.
[0004] Currently, the main function of ligation devices is to push elastic sutures, without automatic suture tightening. The tightening action relies on the doctor's personal experience, making it difficult to guarantee surgical stability. The main reason is that the length of the tightening suture cannot be precisely controlled, and secondly, the pushing and tightening of the elastic suture involve forces in two different directions, which are difficult to achieve on the same device. Summary of the Invention
[0005] The purpose of this utility model is to provide a ligating device that can push and tighten elastic thread, which can control the pushing and tightening of the thread by firing a movable handle, thereby improving ligating efficiency.
[0006] This utility model is achieved through the following technical solution: a ligation device that can push and tighten elastic thread, the main body of which is a ligation and anastomosis gun, the ligation and anastomosis gun includes an adsorption assembly and a handle assembly connected in sequence from front to back; the handle assembly is divided into a fixed handle and a movable handle, and the fixed handle is provided with a negative pressure connector.
[0007] The adsorption assembly includes an adsorption head and an adsorption tube connected sequentially from front to back; the adsorption tube is connected to a fixed handle and communicates with a negative pressure connector.
[0008] Below the adsorption tube, there is also a spring line pull rod and a spring line connected to the front end of the spring line pull rod;
[0009] The elastic cord extends in the front-back direction and the front end of the elastic cord extends to the outer periphery of the front end of the adsorption head; a push-wire mechanism is also sleeved on the outside of the adsorption assembly. The push-wire mechanism is linked to the movable handle, so that firing the movable handle can push the push-wire mechanism to push the front end of the elastic cord away from the front end of the adsorption head.
[0010] The elastic cord pull rod is connected to the tensioning mechanism inside the fixed handle, so that the first firing of the movable handle can push the push mechanism to make the elastic cord fit around the hemorrhoid, and the second firing of the movable handle can drive the elastic cord to retract, thus tying and tightening the hemorrhoid.
[0011] Compared with previous technologies, the beneficial effects of this utility model are as follows:
[0012] 1. The movable handle can perform both pushing and tightening operations, and the tightening length can be precisely controlled for easy quantification.
[0013] 2. Both the push-pull and tighten-pull operations are performed on the movable handle, making the operation simple, quick, and easy to implement.
[0014] 3. It has a quick reset function. After toggling the reset button to reset the push wire mechanism and the tensioning mechanism, you can replace the elastic wire pull rod and put it into use for the next round. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the disassembled structure of the adsorption component;
[0017] Figure 3 This is a schematic diagram of the combined structure of the adsorption component;
[0018] Figure 4 This is a schematic diagram of the movable handle;
[0019] Figure 5 This is a schematic diagram of the actuator structure;
[0020] Figure 6 Detailed structural drawing of the actuator;
[0021] Figure 7 This is a structural schematic diagram of the tensioning wire puller;
[0022] Figure 8 This is a detailed structural diagram of the tension wire tie member;
[0023] Figure 9 This is a schematic diagram of the reset plate.
[0024] Figure 10 A schematic diagram showing the structure with a reset plate and a reset switch mounted on the fixed handle.
[0025] Labeling Explanation: 1. Adsorption Component, 11. Adsorption Head, 12. Adsorption Tube, 13. Negative Pressure Connector, 14. Elastic Wire Pull Rod, 15. Elastic Wire, 16. Rotating Sleeve, 2. Handle Assembly, 21. Fixed Handle, 211. Push Limiting Component, 212. Tightening Limiting Component, 213. First Return Spring, 214. Second Return Spring, 215. Adsorption Control Key, 22. Movable Handle, 221. Turntable, 222. Pin, 223. Push Button, 224. Retraction Limiting Pin, 225. Limiting Pin Switch, 226. Tightening Top Rod, 31. First Push Tube, 32. Second Push Tube, 33. Movable Connector, 34. Pushing Component, 341. Pushing Block, 342. Limiting Block, 343. Limiting Barrier, 344. Pushing Limiting Groove, 35. Lower Step, 41. Tightening Pull Rod, 42. Tightening Pull Component, 431. Empty slide groove, 432 First slide groove, 433 Second slide groove, 434 Third slide groove, 441 First limiting groove, 442 Second limiting groove, 443 Third limiting groove, 444 Fourth limiting groove, 51 Reset piece, 511 First protrusion, 512 Second protrusion, 513 Toggle protrusion, 52 Reset knob. Detailed Implementation
[0026] The present invention will now be described in detail with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description:
[0027] like Figures 1 to 10 As shown, a ligation device that can push and tighten elastic thread is a ligation and anastomosis gun. The ligation and anastomosis gun includes an adsorption assembly 1 and a handle assembly 2 connected in sequence from front to back. The handle assembly 2 is divided into a fixed handle 21 and a movable handle 22. The fixed handle 21 is provided with a negative pressure connector 13.
[0028] The adsorption assembly 1 includes an adsorption head 11 and an adsorption tube 12 connected sequentially from front to back; the adsorption head 11 and the adsorption tube 12 are connected to a fixed handle 21 and communicate with a negative pressure connector 13.
[0029] Below the adsorption tube 12, there is also an elastic cord pull rod 14 and an elastic cord 15 connected to the front end of the elastic cord pull rod 14;
[0030] The elastic cord 15 extends in the front-back direction and the front end of the elastic cord 15 extends to the outer periphery of the front end of the adsorption head 11; the adsorption assembly 1 is also fitted with a push-wire mechanism, which is linked to the movable handle 22 so that the firing movable handle 22 can push the push-wire mechanism to push the front end of the elastic cord 15 away from the front end of the adsorption head 11.
[0031] The elastic cord pull rod 14 is connected to the tensioning mechanism inside the fixed handle 21. Upon first firing, the movable handle 22 pushes the pusher mechanism to secure the elastic cord 15 around the hemorrhoid. Upon second firing, the movable handle 22 moves the elastic cord 15 backward, tightening the hemorrhoid. This invention ensures stable adsorption. The hemorrhoid is secured by pushing the cord with the movable handle on the first firing. During this process, the pusher mechanism pushes the elastic cord to the front of the adsorption head, and the tensioning mechanism is limited and not fired. After the pushing process ends, the tensioning mechanism is released, and the movable handle enters the tensioning firing state. Firing the movable handle then pushes the tensioning mechanism backward, tightening the elastic cord around the hemorrhoid and thus tightening it.
[0032] The movable handle 22 is provided with a turntable 221, and the middle part of the turntable 221 is rotatably connected to the fixed handle 21 through a pin 222;
[0033] The tensioning mechanism includes a tensioning rod 41 and a tensioning member 42; the front end of the tensioning rod 41 is connected to the rear end of the elastic wire rod 14, and the rear end of the tensioning rod 41 is connected to the front end of the tensioning member 42.
[0034] The tensioning puller 42 is installed in the fixed handle 21 by sliding back and forth;
[0035] The turntable 221 is hinged with a tensioning rod 226 that can only swing backward, and a return torsion spring is provided at the hinge.
[0036] The lower surface of the tensioning member 42 is provided with multiple sliding grooves from front to back; so that as the tensioning member 42 moves, the end of the tensioning rod 226 slides into the sliding grooves in sequence.
[0037] The lower surface of the tensioning pull member 42 is provided with a plurality of tensioning limiting grooves from front to back; the inside of the fixed handle 21 is provided with a tensioning limiting member 212 that is connected to the tensioning limiting grooves, and the lower end of the tensioning limiting member 212 is connected to a second spring; so that as the tensioning pull member 42 moves, the tensioning limiting member 212 is inserted into the tensioning limiting groove 44 in sequence.
[0038] The sliding groove is divided into an empty sliding groove 431, a first sliding groove 432, a second sliding groove 433 and a third sliding groove 434 from back to front;
[0039] The tensioning groove is divided into a first limiting groove 441, a second limiting groove 442, a third limiting groove 443 and a fourth limiting groove 444 from back to front;
[0040] During the first wire tensioning firing process of the movable handle 22, the wire tensioning limiter 212 is located in the first limit groove 441, restricting the movement of the wire tensioning puller 42; the wire tensioning push rod 226 slides from the empty slide groove 431 to the first slide groove 432; after the movable handle 22 is reset, the wire tensioning push rod 226 pushes the wire tensioning puller 42 backward, and after the push is completed, the wire tensioning limiter 212 is located in the second limit groove 442;
[0041] Repeating the above-described wire-tightening firing action, the wire-tightening limiter 212 sequentially falls into the second slide groove 433 and the third slide groove 434, and the corresponding wire-tightening limiter 212 sequentially inserts into the third limit groove 443 and the fourth limit groove 444. After the instrument switches from the pushing mode to the wire-tightening mode, the wire-tightening push rod slides into the first slide groove; thereafter, the movable handle can be fired a total of three times. After each firing of the movable handle, the wire-tightening push rod 226 pushes the wire-tightening puller 42 to slide backward once, while the wire-tightening limiter 212 is compressed and reset by the action of the second spring, sequentially falling into the other three limit grooves.
[0042] Specifically, in the first firing of the wire tensioning mechanism, the wire tensioning push rod pushes the wire tensioning puller backward from the first slide groove and falls into the second slide groove. At the same time, the wire tensioning limiter is compressed and reset by the action of the second spring, falling into the second limiter groove. In the second firing of the wire tensioning mechanism, the wire tensioning push rod pushes the wire tensioning puller backward from the second slide groove and falls into the third slide groove. At the same time, the wire tensioning limiter falls into the third limiter groove. In the third firing of the wire tensioning mechanism, the wire tensioning push rod pushes the wire tensioning puller backward from the third slide groove and disengages from the wire tensioning pusher. At the same time, the wire tensioning limiter falls into the fourth limiter groove.
[0043] Furthermore, the spacing between the four tensioning limit grooves can be designed based on the stroke of the movable handle and the tensioning rod. The spacing between the grooves can be increased or decreased, and the number of grooves can also be increased or decreased. Here, the preferred spacing between the grooves is 12mm.
[0044] The turntable 221 is also provided with a push button 223; the push button 223 is located in front of the tensioning rod 226;
[0045] The pusher mechanism includes a first pusher tube 31 disposed on the outer periphery of the adsorption head 11, a second pusher tube 32 sleeved on the outer periphery of the adsorption tube 12, and a pusher 34 disposed inside the fixed handle 21.
[0046] The pusher 34 is slidably installed in the fixed handle 21 and can slide back and forth, and the pusher 34 is located on the right side of the tensioning puller 42;
[0047] The elastic cord pull rod 14 is located below the second push tube 32;
[0048] The front end of the first push tube 31 is located near the front end of the elastic line 15. The first push tube 31 and the second push tube 32 are connected by a movable connector 33. The front end of the movable connector 33 is connected to the rear end of the first push tube 31, and the rear end of the movable connector 33 is connected to the front end of the second push tube 32. The rear end of the second push tube 32 is connected to the front end of the pusher 34.
[0049] After the active handle 22 is activated, the pusher 34 is pushed forward by the push button 223, which in turn pushes the first push tube 31. The first push tube 31 pushes the elastic wire 15 to the front end of the suction head 11 to cover the hemorrhoid.
[0050] The pusher 34 is divided into a pusher block 341 and a limit block 342;
[0051] The push block 341 is located on the front side of the push button 223 and fits against the push button 223;
[0052] The limiting block 342 is located behind the pushing block 341 and is connected to the pushing block 341 through a connecting piece. The limiting block 342 is in a limiting engagement with the tensioning rod 226.
[0053] The front end of the push block 341 is also provided with a limiting wall 343, and the rear of the limiting wall 343 is provided with a push limiting groove 344. The inside of the fixed handle 21 is provided with a push limiting member 211 that is connected to the push limiting groove 344. The lower end of the push limiting member 211 is connected with a first spring.
[0054] When the active handle 22 is not fired, the push limit member 211 is positioned in front of the limit wall 343 to limit the push member 34; during the first firing of the active handle 22, the push button 223 pushes the push block 341 forward, thereby driving the entire push wire mechanism forward, and at the same time pushes the limit member 211 into the push limit groove 344 to lock the position of the push member 34, thus completing the push.
[0055] As the corresponding limit block 342 moves forward, it causes the tensioning rod 226 to fall into the empty slide groove 431.
[0056] Specifically, when the active handle is not activated, the push button 223 rests against the rear side of the push block 34, and the push limit member 211 is blocked by the limit stop 343. During the first activation of the active handle, the push button 223 pushes the push block 34 forward, thereby driving the entire push member forward. Simultaneously, the forward movement of the push member also drives the second push tube and the first push tube forward, achieving the purpose of pushing the elastic cord to the front end of the suction head. At the same time, the push limit member 211 enters the push limit groove 344 to lock the position of the push member.
[0057] It should be noted that: such as Figure 1The diagram shows the state of the elastic cord when no tensioning operation is performed. At this time, the tensioning limiter 212 rests against the first limiting groove 441 of the tensioning pull member, restricting the movement of the tensioning pusher 42. Additionally, the other side of the tensioning push rod 226 without the torsion spring is in contact with the side of the limiting block 342 of the limiter 212. During the aforementioned process of pushing the cord by firing the movable handle, the tensioning push rod 226, blocked by the limiter 342, can only fall into the empty slide groove 431 of the tensioning pull member during the movement of the movable handle. Furthermore, the width of the empty slide groove 431 is wider than the width of the tensioning push rod 226, and its depth is sufficient to keep the tensioning push rod 226 ineffective during the movement of the movable handle, i.e., idle movement.
[0058] The turntable 221 is also provided with a retraction limit pin 224; the retraction limit pin 224 is located between the push button 223 and the tensioning rod 226;
[0059] The side of the turntable 221 is also provided with a limit pin switch 225 for controlling the retraction of the retraction limit pin 224;
[0060] The lower surface of the tensioning member 42 is also provided with a limiting pin slot 445 for the shrinkage limiting pin 224 to pass through, and the limiting pin slot is located at the front end of the fourth limiting slot 444.
[0061] This causes the retraction limit pin 224 to press against the side wall of the third slide groove 434 at the front end of the limit pin slot 445 during the first firing of the movable handle 22, preventing the movable handle 22 from resetting. Pressing the limit pin switch 225 releases the limit, allowing the movable handle 22 to reset. After the wire is pushed, the torsion spring inside the movable handle automatically drives it to reset, but the retraction limit pin of the movable handle gets stuck in the limit pin slot of the tensioning puller, causing the reset to fail. Further, pressing the limit pin switch on the movable handle causes the retraction limit pin to retract inwards, allowing the movable handle to fully reset without the retraction limit pin obstruction. Simultaneously, the tensioning rod is no longer obstructed by the limiter. The pressing of the retraction limit pin switch and the reset of the movable handle are observed characteristics indicating that the instrument has now entered the tensioning mode.
[0062] The fixed handle 21 is also provided with a reset mechanism, which includes a reset piece 51 located on the side of the tensioning member 42 and the pusher 34, and a reset knob 52 connected to the rear end of the reset piece 51.
[0063] A first return spring 213 is provided between the tensioning pull member 42 and the fixed handle 21 to pull the tensioning pull member 42 forward;
[0064] The reset piece 51 has a first protrusion 511 at the front and a second protrusion 512 at the middle; the first protrusion 511 is located in front of the push limiting member 211, and the second protrusion 512 is located in front of the tensioning limiting member 212.
[0065] The front end of the reset piece 51 is also provided with a toggle protrusion 513, and the front end face of the push block 341 is provided with a lower step 35; the toggle protrusion 513 and the lower step 35 are connected in cooperation; so that the toggle reset button 52 can drive the reset piece 51 to move backward, the push limit member 211 is pressed down by the first protrusion 511, and at the same time the tension limit member 212 is pressed down by the second protrusion 512, thereby releasing the locking state of the push member 34 and the tension pull member 42 respectively; the tension pull member 42 is reset forward under the action of the first reset spring 213, and the reset piece 51, which continues to move backward, drives the push member 34 to move backward until the push limit member 211 is locked in front of the limit wall 343.
[0066] By toggling the reset button, the reset piece can be moved backward, thereby pressing the push limiter and the tensioning limiter away from the push limiter groove and the tensioning limiter groove respectively, releasing the limit on the pusher and the tensioning puller and resetting them.
[0067] A second reset spring 214 is also provided between the reset plate 51 and the fixed handle 21 to push the reset plate 51 forward.
[0068] Furthermore, if a patient requires multiple ligations, simply reset the tensioning and pushing mechanisms, replace the elastic thread lever, and the patient can use it again. When the reset plate is pulled, the upper protrusion of the reset plate engages with the lower step at the front end of the pushing mechanism, thereby resetting the pushing mechanism. Secondly, releasing the reset button and pushing the reset spring will also reset the reset button, thereby resetting the reset plate, ultimately allowing both the pushing mechanism and the tensioning mechanism to reset to their original positions. Figure 1 The location shown.
[0069] Then, by replacing the elastic cord pull rod or the elastic cord itself, it can be used again.
[0070] A rotating sleeve 16 is provided between the adsorption component 1 and the handle component 2. The second push tube 32 and the tensioning rod 41 are limited to pass through the rotating sleeve 16, so that when the rotating sleeve 16 drives the second push tube 32 and the tensioning rod 41 to rotate, the second push tube 32 and the tensioning rod 41 can move back and forth relative to the rotating sleeve 16.
[0071] Since a pusher 34 is provided between the second push tube 32 and the movable handle 22, the rear end of the second push tube 32 is rotatably connected to the front end of the pusher 34, so that pressing the movable handle 22 drives the second push tube 32 forward and the second push tube 32 can rotate relative to the pusher 34.
[0072] Other examplesFigure 3 As shown, one end of the adsorption tube 12 is fixedly connected to the adsorption head, and the other end is fixedly connected to the rotating sleeve, so that the rotating sleeve 16 can rotate simultaneously with the second push tube 32 and the tensioning rod 41. The end of the rotating sleeve 16 is connected to the negative pressure connector 13 through a silicone tube. The joint between the rotating sleeve and the fixed handle 21 is also provided with a limiting feature to prevent excessive rotation from causing the silicone tube to become blocked or torn. The limiting feature is a conventional setting and will not be described in detail here.
[0073] Alternatively, a silicone ring can be placed at the end of the rotating sleeve 16 to seal the inner hole of a connector (which can be a tensioning member 42). A negative pressure effect can also be achieved by connecting the connector (or tensioning member 42) to the negative pressure connector 13 through a silicone tube.
[0074] The second push tube 32 and the tensioning rod 41 can move back and forth relative to the rotating sleeve 16, thereby realizing the action of pushing or tensioning the wire.
[0075] The rear end of the second push tube 32 is rotatably connected to the front end of the pusher 34;
[0076] The tensioning rod 41 is designed to be rotatably connected to the front end of the tensioning member 42. The structure of the rotating sleeve is relatively conventional, so it will not be described in detail.
[0077] The adsorption head 11 is an arc-shaped adsorption head 11, and the first push tube 31 is a curved push tube sleeved on the outer periphery of the adsorption head 11.
[0078] A movable connector 33 is also provided between the first push tube 31 and the second push tube 32; the front end of the movable connector 33 is hinged to the first push tube 31, and the rear end of the movable connector 33 is hinged to the second push tube 32. The suction head with an arc-shaped structure has better suction capacity, making it easier for doctors to find and suction hemorrhoids without twisting their arms and bodies.
[0079] Furthermore, the lower end of the curved push tube is provided with a suture-cutting step. After tightening, the operator needs to cut the elastic thread on the suture-cutting step of the curved push tube. The curved push tube is provided with a suture-cutting step in the horizontal direction below its open end. The purpose of this step is to quantify the amount of thread residue, so that the doctor's experience is not required to make a judgment. The thickness or height of the step should be such that the residual length of the thread after the operator cuts it is 2-5mm.
[0080] The lower part of the fixed handle 21 is also provided with an adsorption control key 215, which is used to control the on / off state of the adsorption component 1 and the magnitude of the adsorption force. The structure of the adsorption control key is relatively conventional, so it will not be described in detail.
[0081] In summary, when this device is first fired, the movable handle can only push the elastic cord. Pressing the limit pin switch on the movable handle switches to the tensioning mode, in which the movable handle can be fired three times. Each firing tightens the elastic cord at the front end. Furthermore, the tightening length is precisely controlled each time, facilitating quantification.
[0082] Although this utility model has been illustrated and described using specific embodiments and alternative methods, it should be understood that various changes and modifications are permitted as long as they do not depart from the spirit and scope of this utility model. Therefore, it should be understood that this utility model is not limited in any sense except by the appended claims and their equivalents.
Claims
1. A ligation device that can push and tighten elastic thread, the main body of which is a ligation and anastomosis gun, the ligation and anastomosis gun includes an adsorption assembly (1) and a handle assembly (2) connected in sequence from front to back; the handle assembly (2) is divided into a fixed handle (21) and a movable handle (22), and a negative pressure connector (13) is provided on the fixed handle (21). The adsorption assembly (1) includes an adsorption head (11) and an adsorption tube (12) connected sequentially from front to back; the adsorption tube (12) is connected to a fixed handle (21) and communicates with a negative pressure connector (13); Below the adsorption tube (12) is also provided an elastic wire rod (14) and an elastic wire (15) connected to the front end of the elastic wire rod (14). The elastic cord (15) extends in the front-back direction and the front end of the elastic cord (15) extends to the outer periphery of the front end of the adsorption head (11); the adsorption assembly (1) is also fitted with a push-wire mechanism, which is linked to the movable handle (22) so that the firing movable handle (22) can push the push-wire mechanism to push the front end of the elastic cord (15) away from the front end of the adsorption head (11). Its features are: The elastic cord pull rod (14) is connected to the tensioning mechanism provided in the fixed handle (21), so that the first firing of the movable handle (22) can push the push mechanism to make the elastic cord (15) fit around the hemorrhoid, and the second firing of the movable handle (22) can drive the elastic cord (15) to retract to make the elastic cord (15) tether and tighten the hemorrhoid.
2. The elastic cord pusher and tightening bandage according to claim 1, characterized in that: The movable handle (22) is provided with a turntable (221), and the middle part of the turntable (221) is rotatably connected to the fixed handle (21) through a pin (222); The tensioning mechanism includes a tensioning rod (41) and a tensioning member (42); the front end of the tensioning rod (41) is connected to the rear end of the elastic wire rod (14), and the rear end of the tensioning rod (41) is connected to the front end of the tensioning member (42); The tensioning puller (42) is installed in the fixed handle (21) in a sliding manner; The turntable (221) is hinged with a tension rod (226) that can only swing backward, and a return torsion spring is provided at the hinge. The lower surface of the tensioning member (42) is provided with multiple sliding grooves from front to back; so that as the tensioning member (42) moves, the end of the tensioning rod (226) slides into the sliding groove in sequence; The lower surface of the tensioning pull member (42) is provided with multiple tensioning limit grooves from front to back; the inside of the fixed handle (21) is provided with a tensioning limit member (212) that is connected to the tensioning limit groove, and the lower end of the tensioning limit member (212) is connected to a second spring; so that as the tensioning pull member (42) moves, the tensioning limit member (212) is inserted into the tensioning limit groove in sequence.
3. A ligator capable of pushing and tightening elastic thread according to claim 2, characterized in that: The sliding groove is divided into an empty sliding groove (431), a first sliding groove (432), a second sliding groove (433), and a third sliding groove (434) from back to front. The tensioning groove is divided into a first limiting groove (441), a second limiting groove (442), a third limiting groove (443), and a fourth limiting groove (444) from back to front. During the first wire tensioning firing process of the movable handle (22), the wire tensioning limiter (212) is located in the first limit groove (441) to restrict the movement of the wire tensioning puller (42); the wire tensioning rod (226) slides from the empty slide groove (431) to the first slide groove (432); after the movable handle (22) is reset, the wire tensioning rod (226) pushes the wire tensioning puller (42) backward, and after the push is completed, the wire tensioning limiter (212) is located in the second limit groove (442); Repeat the above-mentioned wire tightening firing action, and the wire tightening limit member (212) falls into the second slide groove (433) and the third slide groove (434) in sequence, and the corresponding wire tightening limit member (212) is inserted into the third limit groove (443) and the fourth limit groove (444) in sequence.
4. A ligator capable of pushing and tightening elastic thread according to claim 3, characterized in that: The turntable (221) is also provided with a push button (223); the push button (223) is located in front of the tensioning rod (226); The pusher mechanism includes a first pusher tube (31) disposed on the outer periphery of the adsorption head (11), a second pusher tube (32) sleeved on the outer periphery of the adsorption tube (12), and a pusher (34) disposed inside the fixed handle (21). The pusher (34) is slidably installed in the fixed handle (21) and can slide back and forth, and the pusher (34) is located on the left side of the tensioning member (42); The elastic wire pull rod (14) is located below the second push tube (32); The front end of the first push tube (31) is located near the front end of the elastic line (15). The first push tube (31) and the second push tube (32) are connected by a movable connector (33). The front end of the movable connector (33) is connected to the rear end of the first push tube (31), and the rear end of the movable connector (33) is connected to the front end of the second push tube (32). The rear end of the second push tube (32) is connected to the front end of the pusher (34). After the active handle (22) is activated, the pusher (34) is pushed forward by the push button (223), which in turn pushes the first push tube (31), and the first push tube (31) pushes the elastic line (15) to the front end of the suction head (11) to cover the hemorrhoid.
5. A ligator capable of pushing and tightening elastic thread according to claim 4, characterized in that: The pusher (34) is divided into a pusher block (341) and a limit block (342). The push block (341) is located on the front side of the push button (223) and fits against the push button (223); The limiting block (342) is located behind the pushing block (341) and connected to the pushing block (341) through a connecting piece. The limiting block (342) is in a limiting engagement with the tensioning rod (226). The front end of the push block (341) is also provided with a limiting wall (343), and the rear of the limiting wall (343) is provided with a push limiting groove (344). The inside of the fixed handle (21) is provided with a push limiting member (211) that is connected to the push limiting groove (344). The lower end of the push limiting member (211) is connected with a first spring. When the active handle (22) is not fired, the push limiter (211) is positioned in front of the limit stop (343) to limit the pusher (34); during the first firing of the active handle (22), the push button (223) pushes the push block (341) forward, thereby driving the entire pusher mechanism forward, and at the same time pushes the limiter (211) into the push limit groove (344) to lock the position of the pusher (34) and complete the push. As the corresponding limit block (342) moves forward, it causes the tensioning rod (226) to fall into the empty slide groove (431).
6. A ligator capable of pushing and tightening elastic thread according to claim 5, characterized in that: The turntable (221) is also provided with a shrinkage limit pin (224); the shrinkage limit pin (224) is located between the push button (223) and the tensioning rod (226); The turntable (221) is also provided with a limit pin switch (225) on its side to control the retraction of the retraction limit pin (224). The lower surface of the tensioning member (42) is also provided with a limiting pin slot (445) for the shrinkage limiting pin (224) to pass through, and the limiting pin slot is located at the front end of the fourth limiting groove (444); When the active handle (22) is fired for the first time, the retractable limit pin (224) presses against the side wall of the third slide groove (434) at the front end of the limit pin slot (445), preventing the active handle (22) from being reset. After pressing the limit pin switch (225), the limit is released, and the active handle (22) is reset.
7. A ligator capable of pushing and tightening elastic thread according to claim 6, characterized in that: The fixed handle (21) is also provided with a reset mechanism, which includes a reset piece (51) located on the side of the tensioning puller (42) and the pusher (34) and a reset knob (52) connected to the rear end of the reset piece (51). A first return spring (213) is provided between the tensioning pull member (42) and the fixed handle (21) to pull the tensioning pull member (42) forward. The reset piece (51) has a first protrusion (511) at the front and a second protrusion (512) at the middle; the first protrusion (511) is located in front of the push limiting member (211), and the second protrusion (512) is located in front of the tensioning limiting member (212); The front end of the reset piece (51) is also provided with a toggle protrusion (513), and the front end of the push block (341) is provided with a lower step (35); the toggle protrusion (513) and the lower step (35) are connected in cooperation; so that the toggle reset knob (52) can drive the reset piece (51) to move backward, the push limit member (211) is pressed down by the first protrusion (511), and at the same time the tension limit member (212) is pressed down by the second protrusion (512), thereby releasing the locking state of the push member (34) and the tension pull member (42) respectively; the tension pull member (42) is reset forward under the action of the first reset spring (213), and the reset piece (51) that continues to move backward drives the push member (34) to move backward until the push limit member (211) is locked in front of the limit wall (343).
8. A ligator capable of pushing and tightening elastic thread according to claim 7, characterized in that: A second reset spring (214) is also provided between the reset plate (51) and the fixed handle (21) to push the reset plate (51) forward.
9. A ligator capable of pushing and tightening elastic thread according to claim 7, characterized in that: A rotating sleeve (16) is provided between the adsorption assembly (1) and the handle assembly (2). The second push tube (32) and the tensioning rod (41) are limited to pass through the rotating sleeve (16), so that when the rotating sleeve (16) drives the second push tube (32) and the tensioning rod (41) to rotate, the second push tube (32) and the tensioning rod (41) can move back and forth relative to the rotating sleeve (16). The rear end of the second push tube (32) is rotatably connected to the front end of the push member (34); so that pressing the movable handle (22) drives the second push tube (32) forward and the second push tube (32) can rotate relative to the push member (34); The tensioning rod (41) is designed to be rotatably connected to the front end of the tensioning member (42).
10. A ligator capable of pushing and tightening elastic thread according to claim 4, characterized in that: The adsorption head (11) is an arc-shaped adsorption head (11), and the first push tube (31) is a curved push tube sleeved on the outer periphery of the adsorption head (11). A movable connector (33) is provided between the first push tube (31) and the second push tube (32); the front end of the movable connector (33) is hinged to the first push tube (31), and the rear end of the movable connector (33) is hinged to the second push tube (32).