Anorectal ligation device

Abstract

The present invention discloses an anorectal ligation device, comprising a ligation mechanism, the ligation mechanism comprising an inner cavity tube for adsorbing diseased tissue, an elastic wire for ligating the diseased tissue, and a wire-pushing tube sleeved on the outer periphery of the inner cavity tube, the front end of the inner cavity tube is a suction nozzle, the elastic wire comprises a ring sleeve on the outer periphery of the suction nozzle, the wire-pushing tube is movably connected to the inner cavity tube and is used to push the ring sleeve, the elastic wire extends backward from one side of the wire-pushing tube, and the side is also provided with a cutting knife movably connected to the wire-pushing tube and is used to cut off the part of the elastic wire located behind the ring sleeve. During the use of the anorectal ligation device, the diseased tissue is first adsorbed by the inner cavity tube, and then the wire-pushing tube pushes the ring sleeve out to enclose the diseased tissue. After the ring sleeve is tightened, the pushing sleeve is rotated, and the moving cutting knife cuts off the part of the elastic wire located behind the ring sleeve. In the process of cutting the elastic wire, the surgical personnel do not need to rely on the help of pliers, which makes the surgical operation simpler and reduces the surgical risk.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to an anorectal ligation device. Background Art

[0002] Anorectal ligation device is a treatment device used to treat polyps, hemorrhoids, etc. The ligation device is connected to a negative pressure suction device, and the tissue is sucked into the barrel under the action of negative pressure, and the ligation sleeve is fixed at the root of the tissue.

[0003] The existing anorectal ligation device requires one hand to hold the main body of the ligation device, and the other hand to operate tools such as pliers to cut the elastic line. Not only is the operation complicated, but it is also easy to cause risks during the operation.

[0004] Therefore, how to provide an anorectal ligation device that is convenient for cutting the elastic line is a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0005] The purpose of the present invention is to provide an anorectal ligation device, the outer side of the wire pushing tube of which is provided with a cutter, and the elastic wire can be cut by moving the cutter, so the surgeon does not need to cut the elastic wire by tools such as pliers.

[0006] To achieve the above-mentioned purpose, the present invention provides an anorectal ligation device, including a ligation mechanism, the ligation mechanism including an inner cavity tube for adsorbing diseased tissue, an elastic wire for ligating the diseased tissue, and a wire pushing tube sleeved on the outer periphery of the inner cavity tube, the front end of the inner cavity tube is a suction nozzle, the elastic wire includes a ring sleeve on the outer periphery of the suction nozzle, the wire pushing tube is movably connected to the inner cavity tube and is used to push the ring sleeve, the elastic wire extends backward from one side of the wire pushing tube, and the side is also provided with a cutting knife that is movably connected to the wire pushing tube and is used to cut off the part of the elastic wire located behind the ring sleeve.

[0007] Preferably, the side wall at the front of the wire pushing tube has a wire routing hole penetrating along the thickness direction, the front end of the wire pushing tube is also provided with a wire hanging ring located outside the wire routing hole, the cutting knife is arranged between the wire routing hole and the wire hanging ring, the front end of the cutting knife is provided with a tangent hole corresponding to the position of the wire routing hole, the ring sleeve is located on the inner side of the wire pushing tube, the part of the elastic wire located behind the ring sleeve passes through the wire routing hole, the tangent hole and the wire hanging ring, and extends to the rear of the inner cavity tube.

[0008] Preferably, the outer side wall of the wire pushing tube is further provided with a first slot for installing the cutting knife, and the first slot is parallel to the wire hanging ring.

[0009] Preferably, the ligation mechanism further comprises a fixing member which is sleeved on the outer periphery of the inner cavity tube and connected to the cutting knife.

[0010] Preferably, the fixing member is provided with a second card slot for installing the cutting knife, a card plate for fixing the cutting knife is provided in the second card slot, and a card slot for cooperating with the card plate is provided at the rear of the cutting knife.

[0011] Preferably, the rear portion of the fixing piece is further provided with a second snap-fit ​​buckle extending backwards, and the outer side wall of the inner cavity tube is further provided with a first snap-fit ​​buckle for snapping and cooperating with the second snap-fit ​​buckle to fix the fixing piece after cutting the elastic line.

[0012] Preferably, the outer side wall of the inner cavity tube is further provided with a first protrusion passing through the wiring hole and the cutting hole to cooperate with the cutting knife.

[0013] Preferably, the rear portion of the wire pushing tube is a boosting leg extending axially rearward along the wire pushing tube, the rear portion of the inner cavity tube is provided with a clamping portion extending radially outward, the ligation mechanism also includes an upper clamping cover and a lower clamping cover which are sleeved on the outer periphery of the inner cavity tube and abut against the front end surface of the clamping portion, the boosting leg is provided with a locking block, and the upper clamping cover and / or the lower clamping cover are provided with a locking card which is located in front of the locking block before the ligation mechanism is used and abuts against the rear side of the locking block after the ligation mechanism is used.

[0014] Preferably, it also includes a wire tightening mechanism for pushing the wire pushing tube, a negative pressure suction mechanism connected to the inner cavity tube for providing negative pressure, and a handle shell located around the wire tightening mechanism and the negative pressure suction mechanism, and the ligation mechanism is detachably connected to the handle shell.

[0015] Preferably, the tensioning mechanism includes a rotating shaft rotatably connected to the handle shell, a trigger assembly installed on the outer periphery of the rotating shaft, the rotating shaft is also fixedly connected to a tensioning wheel, the tensioning wheel is connected to the rear end of the elastic line, and the trigger assembly drives the tensioning wheel to rotate through a transmission part to tighten the elastic line.

[0016] Preferably, the transmission part is a gear fixedly connected to the outer periphery of the rotating shaft, and the trigger assembly is provided with a cam for meshing with the gear.

[0017] Preferably, the tightening mechanism includes a reset spring for pushing the trigger to reset, and the tightening mechanism also includes a ratchet fixedly connected to the outer periphery of the rotating shaft and a limit card for positioning the ratchet when the trigger is reset.

[0018] The anorectal ligation device provided by the present invention comprises a ligation mechanism, which comprises an inner cavity tube for adsorbing diseased tissue, an elastic wire for ligating the diseased tissue, and a wire-pushing tube sleeved on the outer periphery of the inner cavity tube, the front end of the inner cavity tube is a suction nozzle, the elastic wire comprises a ring sleeve on the outer periphery of the suction nozzle, the wire-pushing tube is movably connected to the inner cavity tube and is used to push the ring sleeve, the elastic wire extends backward from one side of the wire-pushing tube, and the side is also provided with a cutting knife which is movably connected to the wire-pushing tube and is used to cut off the part of the elastic wire located behind the ring sleeve.

[0019] During the use of the anorectal ligation device, the diseased tissue is first absorbed through the inner cavity tube, and then the push tube pushes the ring sleeve to cover the diseased tissue. After the ring sleeve is tightened, the push sleeve is rotated, and the cutting knife is moved to cut off the part of the elastic wire behind the ring sleeve. During the process of cutting the elastic wire, the surgeon does not need the help of pliers, making the operation easier and reducing the risk of surgery.

[0020] In addition, the anorectal ligation device also includes a tightening wire assembly, through which the surgeon can tighten the ring sleeve, further reducing the difficulty of the operation and allowing the surgeon to complete the operation alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the external structure of the anorectal ligation device provided by the present invention;

[0023] Figure 2 A schematic diagram of the internal structure of the anorectal ligation device provided by the present invention observed from one side;

[0024] Figure 3 A schematic diagram of the internal structure of the anorectal ligation device provided by the present invention observed from the other side;

[0025] Figure 4 It is an exploded view of the ligation mechanism in the anorectal ligation device;

[0026] Figure 5 It is a structural schematic diagram of the firing mechanism in the anorectal ligation device;

[0027] Figure 6 for Figure 5 A cross-sectional view of the firing mechanism;

[0028] Figure 7 It is a schematic diagram of the structure of the negative pressure channel in the anorectal ligation device.

[0029] in, Figures 1 to 7 The reference numerals in the drawings are:

[0030] Handle shell 1, release button 11, pressure relief button 12; ligation mechanism 2, inner cavity tube 21, suction nozzle 211, plug-in part 212, clamping part 213, guide hole 214, fixing buckle 215, first clamping buckle 216, first guide groove 217, first protrusion 218, second protrusion 219, wire pushing tube 22, push block 221, locking block 222, limit opening 223, first clamping groove 224, wire hanging ring 225, upper clamp cover 23, lower clamp cover 24, locking card 241, fixing member 25, second clamping groove 25 1. Second snap-fit ​​buckle 252, second guide groove 253, elastic line 26, cutting knife 27, threading tube 271; tightening mechanism 3, pushing ring 31, pushing rod 32, reset spring 33, trigger assembly 34, cam 341, push rod 342, push spring 343, rotating shaft 35, tightening wheel 36, gear 37, ratchet 38, limit card 39; negative pressure suction mechanism 4, straight tube 41, three-way tube 42, first interface 421, second interface 422, third interface 423, connecting tube 43, joint 44. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Please refer to Figures 1 to 7 , Figure 1 A schematic diagram of the external structure of the anorectal ligation device provided by the present invention; Figure 2 A schematic diagram of the internal structure of the anorectal ligation device provided by the present invention observed from one side; Figure 3 A schematic diagram of the internal structure of the anorectal ligation device provided by the present invention observed from the other side; Figure 4 It is an exploded view of the ligation mechanism in the anorectal ligation device; Figure 5 It is a structural schematic diagram of the firing mechanism in the anorectal ligation device; Figure 6 for Figure 5 A cross-sectional view of the firing mechanism; Figure 7 It is a schematic diagram of the structure of the negative pressure channel in the anorectal ligation device.

[0034] The anorectal ligation device provided by the present invention has a structure as follows Figures 1 to 3As shown, it includes a handle shell 1, a ligation mechanism 2, a tightening mechanism 3 and a negative pressure adsorption mechanism. The negative pressure adsorption mechanism is connected to the ligation mechanism 2, and the diseased tissue is sucked into the ligation mechanism 2 by negative pressure. The ligation mechanism 2 is provided with an elastic line 26, and a ring sleeve is provided at the front end of the elastic line 26. The tightening mechanism 3 pushes the ligation mechanism 2, and then the ring sleeve is set at the root of the diseased tissue. After tightening the ring sleeve, the operation can be completed by cutting off the part of the elastic line 26 located behind the ring sleeve.

[0035] Optionally, the ligation mechanism 2 includes an inner cavity tube 21, an elastic wire 26 and a wire pushing tube 22. The rear end of the inner cavity tube 21 is a plug-in portion 212 for connecting a negative pressure adsorption mechanism, and the front end is a suction nozzle portion 211 for adsorbing diseased tissue. The ring sleeve of the wire pushing tube 22 is arranged on the outer periphery of the inner cavity tube 21 and is movably connected to the inner cavity tube 21. The ring sleeve is located on the inner side of the wire pushing tube 22 and is distributed along the outer periphery of the suction nozzle portion 211. The side wall of the wire pushing tube 22 is provided with a wiring hole that penetrates along the thickness direction, and the part of the elastic wire 26 located behind the ring sleeve passes through the wiring hole and extends to the rear of the ligation mechanism 2. The wire pushing tube 22 can move forward to push the ring sleeve from the outer periphery of the suction nozzle portion 211 to the root of the diseased tissue, and tightening the ring sleeve can tie the diseased tissue tightly. A cutting knife 27 is also provided on the side where the wiring hole is located, and the cutting knife 27 is movably connected to the wire pushing tube 22. When the annulus has tied up the diseased tissue, the cutting knife 27 can be moved to cut off the part of the elastic wire 26 located behind the annulus. Therefore, the operating staff no longer needs to cut the elastic wire 26 with pliers, making the operation more convenient.

[0036] Optionally, the front end of the wire pushing tube 22 is also provided with a wire hanging ring 225 located outside the wire routing hole, and the cutting knife 27 is arranged between the wire routing hole and the wire hanging ring 225. The front end of the cutting knife 27 is provided with a tangent hole corresponding to the position of the wire routing hole, and the inner side of the tangent hole has a blade. The part of the elastic wire 26 located behind the ring sleeve passes through the wire routing hole, the tangent hole and the wire hanging ring 225 in sequence, and the wire routing hole and the wire hanging ring 225 can open the elastic wire 26. The side of the cutting knife 27 away from the wire pushing tube 22 is also provided with a threading tube 271, and there are two specific threading tubes 271, which are distributed in a direction parallel to the axis of the wire pushing tube 22. The elastic wire 26 passes through the threading tube 271 and extends to the rear of the tying mechanism 2. During the movement of the cutting knife 27, the blade inside the tangent hole can smoothly cut off the elastic wire 26.

[0037] In addition, in order to cooperate with the cutting knife 27 and avoid pulling the diseased tissue during the process of cutting the elastic wire 26, the outer wall of the inner cavity tube 21 is also provided with a first protrusion 218, which passes through the routing hole and the cutting hole, so as to cooperate with the blade in the cutting hole. During use, the blade and the first protrusion 218 clamp the elastic wire 26 from both sides, and the elastic wire 26 can be cut by continuing to move the cutting knife 27.

[0038] Optionally, the ligation mechanism 2 further includes a fixing member 25 sleeved on the outer periphery of the inner cavity tube 21, and the fixing member 25 is movably connected to the inner cavity tube 21. The outer wall of the wire pushing tube 22 is further provided with a first slot 224, and the fixing member 25 is provided with a second slot 251, and the first slot 224 and the second slot 251 are both parallel to the wire hanging ring 225. In the projection of the normal plane of the inner cavity tube 21, the positions of the first slot 224 and the second slot 251 coincide, and the two are located between the projection of the wire hanging ring 225 and the wire pushing tube 22. In addition, as Figure 4 As shown, the first slot 224 has a mounting hole that penetrates in a direction parallel to the axis of the wire pushing tube 22, and the second slot 251 is a three-side opening structure, and the opening positions are specifically the upper side and two side surfaces perpendicular to the axis of the wire pushing tube 22. Therefore, the cutting knife 27 is installed in the first slot 224 and the second slot 251, and can move in a direction parallel to the axis of the wire pushing tube 22.

[0039] Optionally, a clamping plate perpendicular to the axis of the wire pushing tube 22 is provided at the bottom of the second clamping slot 251, and a clamping port for cooperating with the clamping plate is provided at the rear of the cutting knife 27. When the cutting knife 27 is installed in the second clamping slot 251, the buckle and the clamping plate are clamped, and the clamping plate pushes the cutting knife 27 to move during the process of moving the fixing member 25, thereby completing the shearing of the elastic line 26.

[0040] Optionally, a guide boss is provided on the rear outer wall of the inner cavity tube 21 along the axial direction of the inner cavity tube 21, and a second guide groove 253 is provided on the inner side of the fixing member 25. The guide boss is inserted into the second guide groove 253, so that the fixing member 25 can move along the guide boss, realizing the movable connection between the fixing member 25 and the inner cavity tube 21. At the same time, the cooperation between the guide boss and the guide groove can also limit the fixing member 25 in the circumferential direction.

[0041] Optionally, the front side of the cutting hole has a blade, and the first protrusion 218 cooperates with the blade, and the surgeon pulls the fixing member 25 backward to cut the elastic line 26. In addition, in order to prevent the cutting knife 27 from moving randomly after completion, the rear part of the fixing member 25 is also provided with a second snap-on buckle 252 extending backward, and the outer side wall of the inner cavity tube 21 is provided with a first snap-on buckle 216 that cooperates with the second snap-on buckle 252. When the surgeon pulls the fixing member 25 backward to cut the elastic line 26, the first snap-on buckle 216 is snap-oned with the second snap-on buckle 252, thereby fixing the fixing member 25.

[0042] In this embodiment, a cutting knife 27 is provided on one side of the wire pushing tube 22 of the anorectal ligation device, and the cutting knife 27 is movably connected to the inner cavity tube 21 through the fixing member 25, and the elastic wire 26 passes through the tangent hole of the cutting knife 27. When the ring sleeve ties the diseased tissue tightly, the fixing member 25 is pulled to drive the cutting knife 27 to cut the elastic wire 26, and the surgeon does not need to cut the elastic wire 26 with pliers, thereby making the surgical operation easier.

[0043] Optionally, the front part of the wire pushing tube 22 is a tube body, and the rear part is a booster leg extending backward along the axial direction of the wire pushing tube 22. The tube body is sleeved on the outer periphery of the inner cavity tube 21, and a limit opening 223 is provided at the rear part of the tube body, and a second protrusion 219 for matching with the limit opening 223 is provided on the outer side wall of the middle part of the inner cavity tube 21. The second protrusion 219 is embedded in the limit opening 223 to limit the tube body circumferentially. At the same time, the length of the limit opening 223 along the axis of the wire pushing tube 22 is greater than the length of the second protrusion 219 on the axis of the inner cavity tube 21, so that the wire pushing tube 22 can move axially relative to the inner cavity tube 21. There are two booster legs, which are respectively located at the two ends of a diameter of the wire pushing tube 22. A first guide groove 217 is provided on the inner side of the guide boss, and there are two guide bosses, which correspond to the two booster legs respectively. The booster leg can be embedded in the first guide groove 217 and move along the first guide groove 217. The rear part of the inner cavity tube 21 is provided with a clamping part 213 extending radially outward, and the clamping part 213 has a guide hole 214 extending parallel to the axial direction of the inner cavity tube 21, and the boosting leg can be inserted into the guide hole 214. The ligation mechanism 2 also includes an upper clamping cover 23 and a lower clamping cover 24 sleeved on the outer periphery of the inner cavity tube 21, and the two are connected by a bayonet pin to form a locking shell, and the locking shell is against the front end surface of the clamping part 213. The boosting leg is provided with a locking block 222, and the upper clamping cover 23 and / or the lower clamping cover 24 are provided with a locking card 241. Before the ligation mechanism 2 is used, the locking block 222 is located in the locking shell, and the locking card 241 is located at the front side of the locking shell. When the ligation mechanism 2 is used, the wire pushing tube 22 moves forward, so that the locking block 222 moves to the front of the locking card 241. Since the locking block 222 is wedge-shaped, its rear side is perpendicular to the axis of the inner cavity tube 21. After the ligation mechanism 2 is used, the locking card 241 abuts against the rear side surface of the locking block 222, so that the locking block 222 cannot return to the locking shell, thereby preventing the ligation mechanism 2 from being used twice.

[0044] Optionally, the ligation mechanism 2 is connected to the handle shell 1 in a detachable manner. Replacing the ligation mechanism 2 after surgery can avoid cross infection of patients on the one hand, and only replacing the ligation mechanism 2 can reduce surgical consumption on the other hand. Specifically, a fixing buckle 215 is provided at the rear end of the inner cavity tube 21, and the handle shell 1 is provided with a mounting port. The fixing buckle 215 and the plug-in portion 212 of the inner cavity tube 21 are inserted into the mounting port. The fixing buckle 215 is clamped and fixed with the handle shell 1, and the plug-in portion 212 is plugged and connected with the negative pressure suction mechanism 4, and the front side of the handle shell 1 is against the rear side of the clamping portion 213. The handle shell 1 is also provided with a release key 11, and the release key 11 includes a pressing portion and a rebound portion. The pressing portion is exposed from the handle and is suspended, and the rebound portion is fixed on the inner wall of the handle. The pressing portion can be against the fixing buckle 215. When the ligation mechanism 2 needs to be disassembled, the pressing portion is pressed to separate the handle shell 1 from the fixing buckle 215, and the ligation mechanism 2 can be removed at this time.

[0045] Optionally, the negative pressure suction mechanism 4 includes a straight tube 41 for connecting to the plug-in portion 212, a connector 44 for connecting to the negative pressure suction device, and a three-way tube 42 and a connecting tube 43 for connecting the straight tube 41 and the connector 44. The first interface 421 of the three-way tube 42 is connected to the straight tube 41, one end of the connecting tube 43 is connected to the third interface 423 of the three-way tube 42, and the other end is connected to the connector 44. The second interface 422 of the three-way tube 42 is connected to the pressure relief key 12, which is installed on the handle shell 1. The pressure relief key 12 is turned on to open the second interface 422, so that the negative pressure suction mechanism 4 is depressurized.

[0046] In this embodiment, the ligation mechanism 2 is connected to the handle shell 1 in a detachable manner, and a locking shell is provided on the ligation mechanism 2. The locking shell cooperates with the locking block 222 through the locking card 241. After the ligation mechanism 2 is used, the locking card 241 locks the locking block 222, so that the ligation mechanism 2 cannot be used again. The risk of cross infection of patients caused by the secondary use of the ligation mechanism 2 is avoided.

[0047] Optionally, the tensioning assembly is arranged in the handle housing 1, such as Figure 5 and Figure 6 As shown, the tensioning mechanism 3 includes a rotating shaft 35 rotatably connected to the handle shell 1 and a trigger assembly 34 installed on the outer periphery of the rotating shaft 35. The rotating shaft 35 is also fixedly connected with a tensioning wheel 36, and the tensioning wheel 36 is connected to the rear end of the elastic line 26. The trigger assembly 34 cooperates with the rotating shaft 35 through a transmission assembly. When the trigger assembly 34 is pulled, the tensioning wheel 36 can be driven to rotate, thereby tightening the elastic line 26. At the same time, the tensioning mechanism 3 also includes a pushing ring 31 sleeved on the outer periphery of the straight tube 41. The front part of the pushing ring 31 is provided with a pushing rod 32 extending forward. The pushing rod 32 can be inserted into the guide hole 214 of the clamping part 213, thereby pushing the boosting leg of the pushing wire tube 22. In addition, the rear end of the boosting leg is provided with a pushing block 221. The pushing rod 32 and the pushing block 221 are against each other, which can increase the action area between the pushing rod 32 and the boosting leg, and ensure that the thrust effectively acts on the pushing wire tube 22. The lower side of the push ring 31 is provided with a booster block that cooperates with the upper part of the trigger assembly 34. When the trigger assembly 34 is pulled, the upper part of the trigger assembly 34 pushes the booster block forward, thereby causing the push rod 32 to move forward, pushing the wire pushing tube 22 to move forward along the axial direction of the inner cavity tube 21.

[0048] Optionally, the transmission assembly includes a gear 37 fixedly connected to the outer periphery of the rotating shaft 35, and the trigger assembly 34 includes a cam 341 meshing with the gear 37. When the trigger assembly 34 is pulled, the cam 341 drives the gear 37 to rotate. Since the ring sleeve usually needs to pull the elastic line 26 multiple times to be fully tightened, it is necessary to reset the trigger assembly 34 first, and then pull the trigger assembly 34 again to further tighten the elastic line 26. In order to prevent the rotating shaft 35 from rotating during the resetting process of the trigger assembly 34, the tightening assembly also includes a ratchet 38 fixedly connected to the outer periphery of the rotating shaft 35 and a limit card 39 for positioning the ratchet 38 when the trigger assembly 34 is reset. Figure 5 As shown, when the trigger assembly 34 is pulled, the cam 341 drives the tension wheel 36 to rotate through the gear 37, tightening the elastic line 26, and the ratchet 38 rotates normally. When the trigger assembly 34 is released, the limit card 39 abuts against the ratchet 38, and the ratchet 38, the rotating shaft 35, and the tension wheel 36 cannot rotate, and only the trigger assembly 34 rotates to reset. Pulling the trigger assembly 34 again can further tighten the elastic line 26. Therefore, the surgeon can tighten the ring by repeatedly pulling the trigger assembly 34.

[0049] In addition, the trigger assembly 34 also includes a push rod 342 that abuts against the cam 341 and a push spring 343 for supporting the top cover. Figure 6 As shown, the middle part of the cam 341 is hinged to the trigger body, the upper part of the cam 341 is hinged to the gear 37, and the lower part of the cam 341 is against the push rod 342. When the trigger assembly 34 is pulled, the upper part of the cam 341 is pushed toward Figure 6 The reaction force on the left side causes the lower part of the cam 341 to be pushed by the push rod 342 toward Figure 6 The reaction force on the left side, the lower part of the cam 341 is provided with a limit portion located on the left side of the top rod 342 (the left side is Figure 6 The position relationship under the perspective of the position limiter 342, the limiter receives the reaction force of the push rod 342, so that the cam 341 can drive the gear 37 to rotate. When the trigger assembly 34 is reset, the upper part of the cam 341 is pushed toward Figure 6 The force on the right side generates a torque that causes the cam 341 to rotate clockwise. The cam 341 is disengaged from the gear 37 under the action of the torque, so the trigger assembly 34 will not drive the rotating shaft 35 to rotate during the resetting process.

[0050] Optionally, a return spring 33 is further provided on the outer periphery of the push ring 31, one end of the return spring 33 abuts against the handle housing 1, and the other end abuts against the push ring 31. After releasing the trigger assembly 34, the push ring 31 moves backward under the push of the return spring 33, thereby pushing the trigger assembly 34 to reset.

[0051] In this embodiment, the anorectal ligation device is provided with a tightening wire assembly, and the surgeon can tighten the elastic wire 26 by repeatedly pulling the trigger assembly 34 in the tightening wire assembly, thereby tightening the ring. The surgeon can complete the tightening operation of the ring with one hand, which significantly reduces the difficulty of the operation.

[0052] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0053] The anorectal ligation device provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An anorectal ligation device, characterized in that: The ligation mechanism (2) comprises an inner cavity tube (21) for absorbing diseased tissue, an elastic wire (26) for ligating the diseased tissue, and a wire-pushing tube (22) sleeved on the outer periphery of the inner cavity tube (21); the front end of the inner cavity tube (21) is a suction nozzle (211); the elastic wire (26) comprises a ring sleeve on the outer periphery of the suction nozzle (211); the wire-pushing tube (22) is movably connected to the inner cavity tube (21) and is used to push the ring sleeve; the elastic wire (26) extends backward from one side of the wire-pushing tube (22); the side is also provided with a cutting knife (27) movably connected to the wire-pushing tube (22) and is used to cut off the portion of the elastic wire (26) located behind the ring sleeve; The side wall at the front of the wire pushing tube (22) has a wire routing hole penetrating in the thickness direction, the front end of the wire pushing tube (22) is also provided with a wire hanging ring (225) located outside the wire routing hole, the cutting knife (27) is arranged between the wire routing hole and the wire hanging ring (225), the front end of the cutting knife (27) is provided with a tangent hole corresponding to the position of the wire routing hole, the ring sleeve is located on the inner side of the wire pushing tube (22), and the part of the elastic wire (26) located behind the ring sleeve passes through the wire routing hole, the tangent hole and the wire hanging ring (225), and extends to the rear of the inner cavity tube (21); The outer side wall of the inner cavity tube (21) is also provided with a first protrusion (218) passing through the wiring hole and the cutting hole to cooperate with the cutting knife (27); The outer side wall of the wire pushing tube (22) is also provided with a first clamping groove (224) for installing the cutting knife (27), and the first clamping groove (224) is parallel to the wire hanging ring (225).

2. The anorectal ligation device according to claim 1, characterized in that: The ligation mechanism (2) further comprises a fixing member (25) which is sleeved on the outer periphery of the inner cavity tube (21) and connected to the cutting knife (27).

3. The anorectal ligation device according to claim 2, characterized in that: The fixing member (25) is provided with a second card slot (251) for mounting the cutting knife (27); a card plate for fixing the cutting knife (27) is provided in the second card slot (251); and a card slot for cooperating with the card plate is provided at the rear of the cutting knife (27).

4. The anorectal ligation device according to claim 3, characterized in that: The rear portion of the fixing member (25) is also provided with a second snap-fit ​​buckle (252) extending backwards, and the outer side wall of the inner cavity tube (21) is also provided with a first snap-fit ​​buckle (216) for snap-fitting with the second snap-fit ​​buckle (252) to fix the fixing member (25) after the elastic line (26) is cut.

5. The anorectal ligation device according to any one of claims 1 to 4, characterized in that: The rear portion of the wire pushing tube (22) is a boosting leg extending axially rearwardly along the wire pushing tube (22); the rear portion of the inner cavity tube (21) is provided with a clamping portion (213) extending radially outwardly; the ligation mechanism (2) further comprises an upper clamping cover (23) and a lower clamping cover (24) which are sleeved on the outer periphery of the inner cavity tube (21) and abut against the front end surface of the clamping portion (213); the boosting leg is provided with a locking block (222); the upper clamping cover (23) and / or the lower clamping cover (24) are provided with a locking clamp (241) which is located in front of the locking block (222) before the ligation mechanism (2) is used and abuts against the rear side of the locking block (222) after the ligation mechanism (2) is used.

6. The anorectal ligation device according to any one of claims 1 to 4, characterized in that: It also comprises a wire tightening mechanism (3) for pushing the wire pushing tube (22), a negative pressure suction mechanism connected to the inner cavity tube (21) for providing negative pressure, and a handle shell (1) located outside the wire tightening mechanism (3) and the negative pressure suction mechanism, wherein the ligation mechanism (2) is detachably connected to the handle shell (1).

7. The anorectal ligation device according to claim 6, characterized in that: The tightening mechanism (3) comprises a rotating shaft (35) rotatably connected to the handle housing (1), and a trigger assembly (34) mounted on the outer periphery of the rotating shaft (35). The rotating shaft (35) is also fixedly connected to a tightening wheel (36), and the tightening wheel (36) is connected to the rear end of the elastic line (26). The trigger assembly (34) drives the tightening wheel (36) to rotate through a transmission part to tighten the elastic line (26).

8. The anorectal ligation device according to claim 7, characterized in that: The transmission part is a gear fixedly connected to the outer periphery of the rotating shaft (35), and the trigger assembly (34) is provided with a cam (341) for meshing with the gear.

9. The anorectal ligation device according to claim 8, characterized in that: The tightening mechanism (3) comprises a reset spring (33) for pushing the trigger assembly (34) to reset. The tightening mechanism (3) further comprises a ratchet wheel fixedly connected to the outer periphery of the rotating shaft (35) and a limit clamp (39) for positioning the ratchet wheel when the trigger assembly (34) is reset.

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