CN113288305B

CN113288305B - Intestinal polyp ligation device with bendable top end

Info

Publication number: CN113288305B
Application number: CN202110581421.8A
Authority: CN
Inventors: 向长林
Original assignee: Suzhou Beinuo Medical Instruments Co Ltd
Current assignee: Suzhou Beinuo Medical Instruments Co Ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2022-05-27
Anticipated expiration: 2041-05-27
Also published as: CN113288305A

Abstract

The invention relates to the technical field of ligation devices, and discloses a top-end-bendable intestinal polypus ligation device which comprises a firing part protective shell and an elastic ligation ring, wherein a structural sleeve is arranged on one side of the firing part protective shell and comprises a rigid connecting sleeve, a flexible outer tube and a far-end structural tube, a ligation trigger is movably arranged in the centers of the flexible outer tube and the far-end structural tube, and the ligation trigger consists of a trigger head and a trigger connecting rod. Through setting up the flexible outer tube that can freely buckle, because flexible outer tube has the flexibility, flexible outer tube and spacing groove homoenergetic are all can do the bending of certain degree under the exogenic action, thereby make and buckle flexible outer tube according to the angle that needs, make it adapt to complicated intestinal environment, can laminate the top of this ligation device accurately with the polyp position mutually, through the top that can freely buckle, make and need not great usage space when medical staff operates, effectively reduce the operation degree of difficulty, make the ease of use and the universality of ligation device higher.

Description

Intestinal polyp ligation device with bendable top end

Technical Field

The invention relates to the technical field of loop ligatures, in particular to a loop ligature device with a bendable top end for intestinal polyps.

Background

Intestinal polyps are mucosal bulge-like lesions formed by local mucosal hyperplasia and hypertrophy due to chronic inflammation of the mucosa, and can also be adenomas or hamartomas. It is mainly found in the large intestine, while the small intestine is rare, and polyps in the intestine are common, and the incidence rate can rise with age. Some patients may have clinical manifestations of hematochezia, abdominal pain, diarrhea, etc. Most of polyps are benign, are usually cut off by adopting a surgical operation mode, and with the development of medical technology, a purpose-made ligation ring is used for ligating a lesion part, so that an artery of the lesion part is blocked by ligation, the blood supply of intestinal polyps is stopped, and the intestinal polyps are necrotized, atrophied and fallen off, thereby achieving the purpose of healing.

The tip of current ligation device generally is the linear type, its rigid tube is difficult to buckle, make and need great operating space when operation ligation device carries out the ligation operation, but because the ligation operation is gone on in human inside, make the space that medical staff can operate comparatively narrow and small, and can not diversified operation, it is difficult to go on to cause whole ligation operation, make the use of ligation device extremely inconvenient, and need carry out great large-scale expansion to the operation import when conventional ligation device uses, be difficult to operate in affected parts such as the little intestines in space, increase patient's misery, be unfavorable for going on of intestinal polyp treatment.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the intestinal polyp loop ligature device with the bendable top end, which has the advantages of multidirectional rotation, small required operation space, high loop ligature accuracy, simple operation and the like, and solves the problems that the required operation space is large, the operation is difficult to carry out in multiple directions, and the intestinal polyp loop ligature device is not suitable for a narrow intestinal space.

(II) technical scheme

In order to solve the technical problems that the required operation space is large, the multi-directional operation is difficult, and the narrow intestinal tract space is not suitable, the invention provides the following technical scheme: the utility model provides a top can be buckled intestinal polyp ligation ware, includes percussion part protective housing and elasticity ligation ring, percussion part protective housing one side is provided with the structure sleeve pipe, the structure sleeve pipe includes rigid connection sleeve pipe, flexible outer tube and distal end structure pipe, structure sleeve pipe central authorities run through and are provided with the vacuum suction pipe, the inside percussion part that is provided with of percussion part protective housing, the inside percussion connecting rod that is provided with of rigid connection sleeve pipe, the flexible outer tube with the inside central activity of distal end structure pipe is provided with the ligation trigger, the ligation trigger comprises trigger head and trigger connecting rod, the material of trigger head is plastic, the tail end of trigger head is provided with the connecting seat, the top of trigger head comprises a plurality of plasticity posts, the top of plasticity post is provided with the wedge, the outside of wedge is provided with the ligation ring fixed slot, a plurality of ligation ring fixed slot internally mounted are provided with elasticity ligation ring, the trigger connecting rod comprises a bending spring, a connecting bolt and a trigger bolt, the connecting bolt and the trigger bolt are respectively and fixedly arranged at two ends of the bending spring, limiting rods are respectively and symmetrically arranged on the outer sides of the connecting bolt and the trigger bolt, and the connecting bolt and the connecting seat are fixedly connected.

Preferably, two ends of the flexible outer pipe are respectively and fixedly arranged between the rigid connecting sleeve and the far-end structural pipe, limiting grooves are symmetrically formed in the flexible outer pipe, the trigger connecting rod can slide in the limiting grooves under the common limiting action of the limiting rod and the limiting grooves, the flexible outer pipe has flexibility, and the flexible outer pipe and the limiting grooves can be bent to a certain degree under the action of external force.

Preferably, distal end structure pipe is kept away from the one end binding off setting of flexible outer tube, a plurality of wedges have been seted up to the intermediate part surface outward of distal end structure pipe and have been visited the groove, a plurality of wedges visit the groove with the wedge position agrees with, when the trigger head does not receive triggering, the wedge is outstanding the groove is visited to the wedge, when the trigger head receives triggering, the trigger head is to the displacement of tip position, the wedge is in under the plasticity post plastic deformation, a plurality of wedges retract inside the groove is visited to the wedge.

Preferably, the distal end structure pipe is close to the one end bilateral symmetry of flexible outer tube is provided with the locating pin, the rigid connection sleeve pipe is close to the one end bilateral symmetry of flexible outer tube is provided with fixed rotating shaft, the fixed rotating shaft outside all overlaps and is equipped with movable setting element, movable setting element homoenergetic can be around corresponding fixed rotating shaft rotates, the locating pin is close to movable setting element one side is all fixed and is provided with positioning screw, positioning screw runs through movable setting element, positioning screw control the locating pin with linear distance between the movable setting element.

Preferably, the connecting seat, the connecting bolt and the connecting seat are all arranged in a hollow manner, the vacuum suction pipe penetrates through the connecting seat, the connecting bolt and the connecting seat respectively, a conversion head is arranged at the top end of one end of the vacuum suction pipe, the inner diameter and the outer diameter of the conversion head are gradually increased towards the end far away from the vacuum suction pipe, the outer diameter of the end far away from the vacuum suction pipe of the conversion head is equal to the inner diameter of the far-end structural pipe, and the end far away from the vacuum suction pipe of the conversion head is fixed with the end far away from the flexible outer pipe of the far-end structural pipe.

Preferably, firing portion protective housing lower surface one end is provided with the grab handle, firing portion protective housing is kept away from connecting thread pipe has been seted up to one side surface of grab handle, it is fixed through connecting thread pipe threaded connection between firing portion protective housing and the rigid connection sleeve pipe, the inside firing portion installation cavity that is provided with of firing portion protective housing, firing portion protective housing lower surface central authorities have seted up the firing trigger mounting groove, inside the seting up of firing trigger mounting groove is advanced the locking groove of firing portion installation cavity, the bolt shifting chute that runs through completely is seted up to firing portion protective housing side.

Preferably, the firing portion includes firing trigger, spring firing bar and removal bolt, the firing trigger is installed inside the firing trigger mounting groove, the firing trigger top is provided with the unblock lug, the installation of spring firing bar sets up inside the firing portion installation cavity, it is in to remove the bolt activity setting inside the bolt shifting chute.

Preferably, the spring firing rod is composed of a firing spring, a fixed column and a firing column, the fixed column and the firing column are respectively and fixedly arranged at two ends of the firing spring, a firing spring guide column is arranged on one side of the fixed column and inside the firing spring, the movable bolt is fixedly sleeved on the firing column, and the position of the firing column is controlled by the movable bolt.

Preferably, remove the bolt by pulling the outer lane and bolt locking piece and constitute, it runs through to pull the outer lane the bolt shifting groove, pull the outer lane with it connects both to be provided with locking spring between the bolt locking piece, locking spring can with the bolt locking piece is located when locking the groove top, with bolt locking piece bullet income locking inslot portion.

Preferably, one end of the firing connecting rod is provided with a buffer spring, the buffer spring is fixedly connected with the trigger bolt, the movement of the firing connecting rod is controlled by the firing part, and the operation of the ligation trigger can be controlled by the firing part through the firing connecting rod.

(III) advantageous effects

Compared with the prior art, the invention provides a loop ligature device with a bendable top end for intestinal polyps, which has the following beneficial effects:

1. this kind of intestinal polyp ligation device can be buckled on top, flexible outer tube that can freely buckle through the setting, because flexible outer tube has the flexibility, flexible outer tube and spacing groove homoenergetic are all can do the buckling of certain degree down, thereby make and buckle flexible outer tube according to the angle that needs, make its intestinal environment that adapts to complicacy, can laminate the top of this ligation device with the polyp position accurately mutually, through the top that can freely buckle, make and need not great usage space when medical staff operates, effectively reduce the operation degree of difficulty, make the ease for use and the universality of ligation device higher.

2. This kind of intestinal polyp ligation device can be buckled at top, the spacing groove is buckled in step thereupon when flexible outer tube is buckled, and can be through the effect of buckling spring self, make the spring of buckling can buckle into the same shape with flexible outer tube, make under the limiting displacement of trigger connecting rod through gag lever post and spacing groove, trigger connecting rod can move in the route that the spacing groove after buckling provided, make under the condition that flexible outer tube is buckled, trigger connecting rod still can move and control trigger the head, prevent that the removal route that causes because buckle is not smooth, the controlled movement who prevents trigger connecting rod receives the response speed and the response interval that hinder improvement ligation trigger, make the operation of ligation accomplish fast accurately.

3. The intestinal polypus ligation device with the bendable top end is characterized in that a plastic column capable of performing plastic deformation to a certain degree is arranged, when the whole trigger head is triggered, the wedge blocks are under the plastic deformation of the plastic column, the wedge blocks are retracted into the wedge blocks to be detected out of the groove, the diameter of an annular groove formed by a plurality of ligation ring fixing grooves is reduced, the elastic ligation rings are synchronously reduced due to the elastic inner diameter of the elastic ligation rings, a gradually reduced moving path is provided due to the inertia effect and the closing-up of the far-end structure tube, the elastic ligation rings continue to move towards one end, far away from the flexible outer tube, of the far-end structure tube until the elastic ligation rings are separated from the far-end structure tube and are sleeved and ligated on the intestinal part, the ligation operation is completed, the process is controlled through the plastic deformation, the device can be restored to the original position after the trigger head is triggered, and the ligation device can be triggered for many times, and finishing the ligation operation for many times.

4. This kind of intestinal polyp ligation device can be buckled on top, through the activity setting element that can free rotation, make the activity setting element can not obstruct positioning screw and rotate, and it is fixed after the position change between positioning screw and the activity setting element, make the straight-line distance between bolt and the activity setting element can be controlled through positioning screw, thereby the angle of buckling of the flexible outer tube of fixed locking through straight-line distance, make the angle of buckling of flexible outer tube can not change in operation process, guarantee the accuracy nature at ligation position, improve the accuracy of ligation.

5. This kind of intestinal polyp ligation ware can be buckled to top, through setting up the percussion portion, make and to drive the percussion post through removing the bolt and remove, the percussion post removes the compression percussion spring under the guide effect of percussion spring guide post, make the percussion spring accumulate collect together elastic potential energy, and after removing the spacing of removing the bolt, the percussion spring can release elastic potential energy rapidly, make the percussion post promote the percussion connecting rod fast and remove the percussion that carries out the ligation trigger, make the opportunity of percussion carry out remote control through the percussion trigger, the opportunity of the medical staff control percussion of being convenient for, guarantee the effective control of the ligation process of ligation ware, reduce the ligation operation degree of difficulty of ligation ware.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic diagram of the overall explosion of the present invention;

FIG. 4 is a schematic view of a partially enlarged structure of the present invention;

FIG. 5 is a schematic partial cross-sectional view of the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5 in accordance with the present invention;

FIG. 7 is an enlarged schematic view of portion B of FIG. 5 in accordance with the present invention;

FIG. 8 is a second partial cross-sectional view of the present invention;

FIG. 9 is an enlarged schematic view of portion C of FIG. 8 in accordance with the present invention;

FIG. 10 is an exploded schematic view of the structural sleeve, vacuum straw, firing link and ligation trigger of the present invention;

fig. 11 is a schematic perspective view of the trigger head of the present invention;

FIG. 12 is a schematic perspective view of a trigger link according to the present invention;

FIG. 13 is a partial perspective view of the rigid connection sleeve and distal structural tube of the present invention;

FIG. 14 is an exploded view of the firing portion protective housing and firing portion of the present invention;

FIG. 15 is a cross-sectional schematic view of a firing portion protective housing and firing portion of the present invention;

fig. 16 is an enlarged view of portion D of fig. 15 of the present invention.

In the figure: 1. a percussion part protection shell; 11. a handle; 12. connecting a threaded pipe; 13. the firing part is provided with a cavity; 14. a trigger mounting groove; 15. a locking groove; 16. a bolt travel slot; 2. a structural sleeve; 3. a rigid connection sleeve; 31. fixing the rotating shaft; 32. a movable positioning member; 4. a flexible outer tube; 41. a limiting groove; 5. a distal structural tube; 51. the wedge-shaped block is used for detecting the groove; 52. positioning bolts; 53. positioning a screw rod; 6. a vacuum suction pipe; 61. a conversion head; 7. a percussion part; 71. a trigger; 711. unlocking the bump; 72. a spring firing bar; 721. a firing spring; 722. fixing a column; 723. a firing post; 724. a firing spring guide post; 73. moving the bolt; 731. pulling the outer ring; 732. a bolt locking block; 733. a locking spring; 8. a firing connecting rod; 81. a buffer spring; 9. a ligation trigger; 91. a trigger head; 911. a connecting seat; 912. a plastic column; 913. a wedge block; 914. looping and binding a ring fixing groove; 92. a trigger link; 921. bending the spring; 922. a connecting bolt; 923. triggering the bolt; 924. a limiting rod; 93. an elastic loop ligature ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As described in the background, the prior art has shortcomings, and in order to solve the above technical problems, the present application provides a sleeve ligator capable of bending the top end of an intestinal polyp.

Referring to fig. 1-16, a intestinal polyp ligation device with a bendable top end comprises a triggering part protection shell 1 and an elastic ligation ring 93, a structure sleeve 2 is arranged on one side of the triggering part protection shell 1, the structure sleeve 2 comprises a rigid connection sleeve 3, a flexible outer tube 4 and a far-end structure tube 5, a vacuum suction tube 6 is arranged in the center of the structure sleeve 2 in a penetrating manner, a triggering part 7 is arranged in the triggering part protection shell 1, a triggering connecting rod 8 is arranged in the rigid connection sleeve 3, a ligation trigger 9 is movably arranged in the centers of the flexible outer tube 4 and the far-end structure tube 5, the ligation trigger 9 is composed of a trigger head 91 and a trigger connecting rod 92, the trigger head 91 is made of plastic, a connecting seat 911 is arranged at the tail end of the trigger head 91, the top end of the trigger head 91 is composed of a plurality of plastic columns 912, a wedge 913 is arranged at the top end of the plastic columns 912, a ligation ring fixing groove 914 is arranged outside the wedge 913, the elastic ligation rings 93 are arranged inside the ligation ring fixing grooves 914, the trigger connecting rod 92 consists of a bending spring 921, a connecting bolt 922 and a trigger bolt 923, the connecting bolt 922 and the trigger bolt 923 are respectively and fixedly arranged at two ends of the bending spring 921, the outer sides of the connecting bolt 922 and the trigger bolt 923 are respectively and symmetrically provided with a limiting rod 924, the connecting bolt 922 and the connecting seat 911 are fixedly connected, so that the elastic ligation rings 93 are stably fixed inside the elastic ligation rings 93 in the ligation preparation process through the ligation trigger 9, and the trigger link 92 can be bent in synchronization with the bending of the flexible tube 4 by the provision of the bending spring 921, the movement of the trigger link 92 can be further converted into the movement of the whole trigger head 91 through the connecting bolt 922, the trigger head 91 can follow certain strain to ensure that the trigger head 91 can be well controlled under the condition that the top end is arbitrarily bent.

Furthermore, two ends of the flexible outer tube 4 are respectively and fixedly arranged between the rigid connection sleeve 3 and the distal structure tube 5, the flexible outer tube 4 is symmetrically provided with a limiting groove 41, the trigger link 92 can slide in the limiting groove 41 under the common limiting action of the limiting rod 924 and the limiting groove 41, the flexible outer tube 4 has flexibility, both the flexible outer tube 4 and the limiting groove 41 can be bent to a certain degree under the external force, so that the flexible outer tube 4 can be bent according to a required angle to adapt to a complex intestinal environment, the limiting groove 41 can be synchronously bent along with the flexible outer tube 4 when the flexible outer tube 4 is bent, the bending spring 921 can be bent into the same shape as the flexible outer tube 4, and the trigger link 92 can move in a path provided by the bent limiting groove 41 under the limiting action of the limiting rod 924 and the limiting groove 41, so that the trigger link 92 can still move to control and trigger the trigger head 91 when the flexible outer tube 4 is bent, thereby preventing the movement path from being unsmooth due to bending and preventing the controlled movement of the trigger link 92 from being blocked.

Furthermore, the end of the distal structural tube 5, which is away from the flexible outer tube 4, is closed, the outer surface of the middle portion of the distal structural tube 5 is provided with a plurality of wedge-shaped block detection grooves 51, the wedge-shaped block detection grooves 51 are matched with the wedge-shaped blocks 913 in position, when the trigger head 91 is not triggered, the wedge-shaped blocks 913 protrude out of the wedge-shaped block detection grooves 51, when the trigger head 91 is triggered, the trigger head 91 is displaced towards the end position, the wedge-shaped blocks 913 are under plastic deformation of the plastic column 912, the wedge-shaped blocks 913 are retracted into the wedge-shaped block detection grooves 51, so that after the trigger head 91 is triggered by closing up of the distal structural tube 5, the wedge-shaped blocks 913 and the plastic column 912 move, after the trigger head 91 is stressed, the plastic column 912 is bent, so that the plurality of wedge-shaped blocks 913 gradually shift towards the center of the trigger head under the action of the distal structural tube 5, so that the wedge-shaped blocks 913 move towards the end of the distal structural tube 5, which is away from the flexible outer tube 4, along with the closing up of the distal structural tube 5, the plurality of wedge blocks 913 are retracted into the wedge block extending groove 51, so that the diameter of the annular groove formed by the plurality of ligation ring fixing grooves 914 is reduced, the elastic ligation ring 93 is also synchronously reduced due to the elastic inner diameter of the elastic ligation ring 93, until the elastic ligation ring is reduced to the size consistent with the outer diameter of the distal structure tube 5 at the corresponding position, a gradually reduced moving path is provided due to the inertia effect and the closing-in of the distal structure tube 5, the elastic ligation ring 93 continues to move towards one end of the distal structure tube 5, which is far away from the flexible outer tube 4, until the elastic ligation ring 93 is separated from the distal structure tube 5 and is ligated at the intestinal polypus part, and the ligation operation is completed.

Furthermore, two sides of one end of the distal structure tube 5 close to the flexible outer tube 4 are symmetrically provided with a positioning bolt 52, two sides of one end of the rigid connection sleeve 3 close to the flexible outer tube 4 are symmetrically provided with a fixed rotating shaft 31, the outer sides of the fixed rotating shafts 31 are respectively sleeved with a movable positioning piece 32, the movable positioning pieces 32 can rotate around the corresponding fixed rotating shafts 31, one side of the positioning bolt 52 close to the movable positioning piece 32 is fixedly provided with a positioning screw 53, the positioning screw 53 penetrates through the movable positioning piece 32, the positioning screw 53 controls the linear distance between the positioning bolt 52 and the movable positioning piece 32, so that the movable positioning piece 32 can not obstruct the rotation of the positioning screw 53, and the position between the positioning screw 53 and the movable positioning piece 32 is changed and then fixed, so that the linear distance between the positioning bolt 52 and the movable positioning piece 32 can be controlled by the positioning screw 53, therefore, the bending angle of the flexible outer tube 4 is fixed and locked through the linear distance, so that the bending angle of the flexible outer tube 4 cannot be changed in the operation process, the accuracy of the ligation part is ensured, and the precision of the ligation is improved.

Further, the connecting seat 911, the connecting bolt 922 and the connecting seat 911 are all hollow, the vacuum suction tube 6 penetrates through the connecting seat 911, the connecting bolt 922 and the connecting seat 911 respectively, the top end of one end of the vacuum suction tube 6 is provided with the conversion head 61, the inner diameter and the outer diameter of the conversion head 61 are gradually increased towards the end far away from the vacuum suction tube 6, the outer diameter of the end far away from the vacuum suction tube 6 of the conversion head 61 is equal to the inner diameter of the far-end structural tube 5, the end far away from the vacuum suction tube 6 of the conversion head 61 is fixed with the end far away from the flexible outer tube 4 of the far-end structural tube 5, in specific implementation, the vacuum suction pipe 6 penetrates through the ligation device and is connected with the vacuum machine, after the end part of the whole ligation device is buckled with the intestinal polyp to be ligated, through vacuum suction pipe 6 with the conversion head 61 with intestinal skin fully absorb the back earlier for intestinal polyp gets into inside the conversion head 61, inhale intestinal polyp and play the package back and then the loop ligature through elasticity loop 93.

Further, 1 lower surface one end of percussion portion protective housing is provided with grab handle 11, one side surface that percussion portion protective housing 1 kept away from the grab handle has seted up connecting thread pipe 12, it is fixed through connecting thread pipe 12 threaded connection between percussion portion protective housing 1 and the rigid connection sleeve pipe 3, percussion portion installation cavity 13 is provided inside to percussion portion protective housing 1, percussion trigger mounting groove 14 has been seted up to percussion portion protective housing 1 lower surface central authorities, percussion trigger mounting groove 14 is inside to be seted up and to run through locking groove 15 into percussion portion installation cavity 13, bolt shifting chute 16 that runs through completely is seted up to percussion portion protective housing 1 side, thereby make each inside the groove of protective housing 1 can be installed to each subassembly of percussion portion 7, and make percussion portion 7 can reach corresponding function through each subassembly of protective housing 1.

Further, the firing part 7 comprises a firing trigger 71, a spring firing rod 72 and a movable bolt 73, the firing trigger 71 is installed inside the firing trigger installation groove 14, an unlocking lug 711 is arranged at the top end of the firing trigger 71, the spring firing rod 72 is installed inside the firing part installation cavity 13, the movable bolt 73 is movably arranged inside the bolt moving groove 16, further, the firing trigger 71, the spring firing rod 72 and the movable bolt 73 are respectively and movably installed inside the protective shell 1, and the purpose of controlled firing is achieved through the operation of the firing trigger 71, the spring firing rod 72 and the movable bolt 73 inside the protective shell 1,

and by depressing the firing trigger 71, the unlocking tab 711 pushes up the bolt locking block 732 under the action of the locking spring 733, so that the bolt 73 is moved to unlock the spring firing bar 72, and the accumulated elastic potential energy of the spring firing bar 72 is released, so that the spring firing bar 72 fires the firing link 8.

Further, the spring trigger rod 72 is composed of a trigger spring 721, a fixed column 722 and a trigger column 723, the fixed column 722 and the trigger column 723 are respectively and fixedly arranged at two ends of the trigger spring 721, a trigger spring guide column 724 is arranged on one side of the fixed column 722 and inside the trigger spring 721, the movable bolt 73 is sleeved and fixed on the trigger column 723, the movable bolt 73 controls the position of the trigger column 723, so that the trigger column 723 can be driven to move by moving the bolt 73, the trigger column 723 moves to compress the trigger spring 721 under the guiding action of the trigger spring guide column 724, the trigger spring 721 accumulates elastic potential energy, and after the limit of the movable bolt 73 is released, the trigger spring 721 can rapidly release the elastic potential energy, so that the trigger column 723 rapidly pushes the trigger link 8 to move to trigger the ligation trigger 9.

Further, the movable bolt 73 is composed of a wrenching outer ring 731 and a bolt locking block 732, the wrenching outer ring 731 penetrates through the bolt moving slot 16, a locking spring 733 is arranged between the wrenching outer ring 731 and the bolt locking block 732 to connect the wrenching outer ring 731 and the bolt locking block 732, and the locking spring 733 can eject the bolt locking block 732 into the locking slot 15 when the bolt locking block 732 is located above the locking slot 15, so as to lock the movable bolt 73, so that the elastic potential energy accumulated by the firing spring 721 can be stored in a controlled manner, and the firing spring 721 can rapidly react to fire after the movable bolt 73 is unlocked.

Further, 8 one ends of the trigger connecting rods are provided with buffer springs 81, the buffer springs 81 are fixedly connected with the trigger bolts 923, the movement of the trigger connecting rods 8 is controlled by the trigger part 7, and the operation of the ligation trigger 9 can be controlled by the trigger part 7 of the trigger connecting rods 8, so that the ligation trigger 9 can be triggered and then restored under the action of the buffer springs 81, and the ligation trigger 9 can be triggered and started again.

The working principle is as follows: when the device is used, firstly, the connecting threaded pipe 12 is arranged on the surface of one side, away from the grab handle, of the firing part protective shell 1, the firing part protective shell 1 and the rigid connecting sleeve 3 are fixedly connected through the connecting threaded pipe 12 in a threaded mode, then the vacuum machine is connected with one end, away from the conversion head 61, of the vacuum suction pipe 6 of the ligation device, whether each part of the intestinal polypus ligation device can normally work is detected, and then the required bending angle of the top end of the ligation device is judged according to the actual working position of the intestinal polyp ligation device.

According to the above angle judgment, the flexible outer tube 4 is bent to a required angle to adapt to a complex intestinal environment, the limiting groove 41 is bent synchronously when the flexible outer tube 4 is bent, the bending spring 921 can be bent into the same shape as the flexible outer tube 4, so that the trigger link 92 can be bent synchronously with the bending of the flexible tube 4, so that the trigger link 92 can move in a path provided by the bent limiting groove 41 under the limiting action of the limiting rod 924 and the limiting groove 41, so that when the flexible outer tube 4 is bent, the motion of the trigger link 92 can be converted into the motion of the whole trigger head 91 through the connecting bolt 922, so that the trigger head 91 can follow the motion with a certain strain, the trigger head 91 can be well controlled under the condition that the top end is bent arbitrarily, and the trigger link 92 can still move to control and trigger the trigger head 91, preventing the movement path from being blocked due to the bending, and preventing the controlled movement of the trigger link 92 from being blocked.

After bending and shaping, the positioning bolts 52 symmetrically arranged at two sides of one end of the far-end structural tube 5 close to the flexible outer tube 4 and the movable positioning piece 32 sleeved outside the fixed rotating shaft 31 symmetrically arranged at two sides of one end of the rigid connecting sleeve 3 close to the flexible outer tube 4 enable the movable positioning piece 32 to rotate around the corresponding fixed rotating shaft 31, the positioning screw 53 penetrates through the movable positioning piece 32, the positioning screw 53 controls the linear distance between the positioning bolt 52 and the movable positioning piece 32, so that the movable positioning piece 32 can freely rotate, the movable positioning piece 32 can not block the rotation of the positioning screw 53, and the position between the positioning screw 53 and the movable positioning piece 32 is changed and then fixed, so that the linear distance between the positioning bolt 52 and the movable positioning piece 32 can be controlled through the positioning screw 53, thereby the bending angle of the flexible outer tube 4 can be locked through the linear distance, the included angle between the distal end structure tube 5 and the rigid connection sleeve 3 is fixed, so that the bending angle of the flexible outer tube 4 can not be changed in the operation process, the accuracy of the ligation part is ensured, and the precision of the ligation is improved.

After the completion of the bending locking, the corresponding part of the movable bolt 73 slides in the bolt moving groove 16 by pulling the wrenching outer ring 731 of the movable bolt 73, during the movement, the bolt locking block 732 moves along with the whole movable bolt 73 in the firing part installation cavity 13, the movable bolt 73 drives the firing column 723 to move, the firing column 723 moves under the guiding action of the firing spring guiding column 724 to compress the firing spring 721, so that the firing spring 721 gradually accumulates elastic potential energy, until the bolt locking block 733 is positioned above the locking groove 15, the locking spring 734 ejects the bolt locking block 733 into the locking groove 15 to lock the position of the whole movable bolt 73, and simultaneously the position of the firing column 723 can be locked, so that the elastic potential energy accumulated by the firing spring 721 can be controlled to be stored, and after the movable bolt 73 is unlocked, the firing spring 721 rapidly reacts to perform locking, thus, the cocking preparation operation is completed.

Then, after the top end of the intestinal polyp ligation device is attached to a part to be liganded, the firing trigger 71 is pressed to rotate in a firing trigger mounting groove 14, the unlocking bump 711 jacks up the bolt locking block 732 under the action of the locking spring 733, the bolt locking block 732 is sent into the firing part mounting cavity 13, the locking of the bolt locking block 732 on the whole movable bolt 73 and the firing column 723 is released, the firing spring 721 can rapidly release elastic potential energy to push the firing column 723 to rapidly move and conduct the elastic potential energy to the buffer spring 81 through the firing connecting rod 8, the force in the elastic potential energy is buffered to a certain degree and then conducted to the ligation trigger 9, and the ligation trigger 9 is triggered under force.

The triggering action of the ligation trigger 9 is firstly transmitted to the trigger link 92, the trigger link 92 can be bent synchronously along with the bending of the flexible tube 4 by the arrangement of the bending spring 921 in the trigger link 92, and moves along the path provided by the limiting groove 41 which is bent synchronously, then the movement of the trigger link 92 is converted into the movement of the whole trigger head 91 by the connecting bolt 922, when the trigger head 91 is triggered, the trigger head 91 moves towards the end position, the wedge blocks 913 are retracted into the wedge block detecting groove 51 under the plastic deformation of the plastic column 912, so that after the trigger head 91 is triggered by the closing-in of the distal structure tube 5, the wedge blocks 913 and the plastic column 912 move, the plastic column 912 is bent under the stress of the trigger head 91, the plurality of wedge blocks 913 gradually shift towards the center of the trigger head under the action of the distal structure tube 5, and the wedge blocks 913 move towards the end of the distal structure tube 5 which is far away from the flexible tube 4 along with the closing-in of the distal structure tube 5 And moving, wherein the plurality of wedge blocks 913 are retracted into the wedge block detection groove 51, so that the diameter of the annular groove formed by the plurality of ligation ring fixing grooves 914 is reduced, the elastic ligation ring 93 is also synchronously reduced due to the elastic inner diameter of the elastic ligation ring 93, until the elastic ligation ring is reduced to the size consistent with the outer diameter of the distal structure tube 5 at the corresponding position, a gradually reduced moving path is provided due to the action of inertia and the closing-in of the distal structure tube 5, so that the elastic ligation ring 93 continues to move towards one end of the distal structure tube 5, which is far away from the flexible outer tube 4, until the elastic ligation ring 93 is separated from the distal structure tube 5 and is ligated at the intestinal polypus part, and the ligation operation is completed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a top intestinal polyp ligation device of can buckling, includes percussion portion protective housing (1) and elasticity ligation ring (93), its characterized in that: the utility model discloses a percussion part, including percussion part protective housing (1), percussion part protective housing (1) one side is provided with structure sleeve pipe (2), structure sleeve pipe (2) include rigid connection sleeve pipe (3), flexible outer tube (4) and distal end structure pipe (5), structure sleeve pipe (2) central authorities run through and are provided with vacuum suction pipe (6), percussion part (7) are provided with to percussion part protective housing (1) inside, the inside percussion connecting rod (8) that is provided with of rigid connection sleeve pipe (3), flexible outer tube (4) with the inside central authorities activity of distal end structure pipe (5) is provided with ligation trigger (9), ligation trigger (9) comprise trigger head (91) and trigger connecting rod (92), the material of trigger head (91) is the plastic plastics, the tail end of trigger head (91) is provided with connecting seat (911), the top of trigger head (91) comprises a plurality of plastic post (912), the top end of the plastic column (912) is provided with a wedge block (913), the outer side of the wedge block (913) is provided with a ligation ring fixing groove (914), an elastic ligation ring (93) is arranged inside the ligation ring fixing groove (914), the trigger connecting rod (92) consists of a bending spring (921), a connecting bolt (922) and a trigger bolt (923), the connecting bolt (922) and the trigger bolt (923) are respectively and fixedly arranged at two ends of the bending spring (921), the outer sides of the connecting bolt (922) and the trigger bolt (923) are respectively and symmetrically provided with a limiting rod (924), and the connecting bolt (922) and the connecting seat (911) are fixedly connected; distal end structure pipe (5) are close to the one end bilateral symmetry of flexible outer tube (4) is provided with pilot pin (52), rigid connection sleeve pipe (3) are close to the one end bilateral symmetry of flexible outer tube (4) is provided with fixed rotating shaft (31), all the cover in fixed rotating shaft (31) outside is equipped with movable positioning element (32), activity positioning element (32) all can be around corresponding fixed rotating shaft (31) rotate, pilot pin (52) are close to activity positioning element (32) one side is all fixed and is provided with positioning screw (53), positioning screw (53) run through movable positioning element (32), positioning screw (53) control pilot pin (52) with the straight-line distance between the activity positioning element (32).

2. The intestinal polyp loop ligature device with a bendable top end of claim 1, wherein: the flexible outer pipe (4) is fixedly arranged between the two ends of the flexible outer pipe (4) and the rigid connecting sleeve (3) and the far-end structural pipe (5) respectively, limiting grooves (41) are symmetrically formed in the flexible outer pipe (4), the trigger connecting rod (92) can slide in the limiting grooves (41) under the common limiting action of the limiting rod (924) and the limiting grooves (41), the flexible outer pipe (4) has flexibility, the flexible outer pipe (4) and the limiting grooves (41) can be bent to a certain degree under the action of external force, the limiting grooves (41) are synchronously bent when the flexible outer pipe (4) is bent, the bending spring (921) can be bent into the same shape as the flexible outer pipe (4), so that the trigger connecting rod (92) can move in a path provided by the bent limiting grooves (41) under the limiting action of the limiting rod (924) and the limiting grooves (41), so that the trigger link (92) can still move to control and trigger the trigger head (91) under the condition that the flexible outer pipe (4) is bent.

3. The intestinal polyp loop ligature device with a bendable top end as claimed in claim 2, wherein: keep away from far-end structure pipe (5) the one end binding off setting of flexible outer tube (4), a plurality of wedges are seted up to the intermediate part outer surface of far-end structure pipe (5) and are visited groove (51), a plurality of wedges visit groove (51) with wedge (913) position agrees with, when trigger head (91) do not receive the trigger, wedge (913) are outstanding wedge visits groove (51), when trigger head (91) are triggered, trigger head (91) to the displacement of tip position, wedge (913) are in under plastic column (912) plastic deformation, a plurality of wedges (913) retract inside wedge visits groove (51), make through the binding off of far-end structure pipe (5) buckle make after trigger head (91) receives the trigger, wedge (913) and plastic column (912) motion, plastic column (912) atress behind trigger head (91) atress, make a plurality of wedge (913) to trigger head central deviation gradually under the effect of distal end structure pipe (5), make wedge (913) move to the one end of keeping away from flexible outer tube (4) of distal end structure pipe (5) along with the binding off of distal end structure pipe (5), inside a plurality of wedge (913) retraction wedge probe groove (51), make the ring channel diameter of a plurality of loop ligature ring fixed slot (914) constitution reduce, elastic loop ligature ring (93) are because the elasticity internal diameter of self also reduces in step, until reduce to the unanimous size of the external diameter with distal end structure pipe (5) of corresponding position.

4. The intestinal polyp loop ligature device with a bendable top end of claim 3, wherein: the connecting seat (911), the connecting bolt (922) and the connecting seat (911) are both arranged in a hollow mode, the vacuum suction pipe (6) penetrates through the connecting seat (911), the connecting bolt (922) and the connecting seat (911) respectively, a conversion head (61) is arranged at the top end of one end of the vacuum suction pipe (6), the inner diameter and the outer diameter of the conversion head (61) are gradually increased towards the end far away from the vacuum suction pipe (6), the outer diameter of one end of the vacuum suction pipe (6) far away from the conversion head (61) is equal to the inner diameter of the far-end structural pipe (5), one end far away from the vacuum suction pipe (6) and one end far-end structural pipe (5) far away from the flexible outer pipe (4) are fixed through the conversion head (61).

5. The intestinal polyp loop ligature device with a bendable top end as claimed in claim 4, wherein: percussion portion protective housing (1) lower surface one end is provided with grab handle (11), percussion portion protective housing (1) is kept away from connecting threaded pipe (12) have been seted up to a side surface of grab handle, it is fixed through connecting threaded pipe (12) threaded connection between percussion portion protective housing (1) and rigid connection sleeve pipe (3), the inside percussion portion installation cavity (13) that is provided with of percussion portion protective housing (1), percussion portion protective housing (1) lower surface central authorities have seted up percussion trigger mounting groove (14), percussion trigger mounting groove (14) inside has seted up and has run through into locking groove (15) of percussion portion installation cavity (13), bolt shifting chute (16) that run through completely are seted up to percussion portion protective housing (1) side.

6. The intestinal polyp loop ligature device with a bendable top end as claimed in claim 5, wherein: firing portion (7) are including firing trigger (71), spring firing pole (72) and removal bolt (73), firing trigger (71) are installed inside firing trigger mounting groove (14), firing trigger (71) top is provided with unblock lug (711), spring firing pole (72) installation sets up inside firing portion installation cavity (13), it is in to remove bolt (73) activity setting inside bolt shifting chute (16).

7. The intestinal polyp loop ligature device with a bendable top end of claim 6, wherein: the spring firing rod (72) is composed of a firing spring (721), a fixed column (722) and a firing column (723), the fixed column (722) and the firing column (723) are fixedly arranged at two ends of the firing spring (721) respectively, a firing spring guide column (724) is arranged on one side of the fixed column (722) and located inside the firing spring (721), the movable bolt (73) is fixedly sleeved on the firing column (723), and the movable bolt (73) controls the position of the firing column (723).

8. The intestinal polyp ligator bendable at the top end of claim 7, wherein: remove bolt (73) by pulling outer lane (731) and bolt locking block (732) and constitute, pull outer lane (731) and run through bolt removal groove (16), pull outer lane (731) and be provided with locking spring (733) between bolt locking block (732) and connect both, locking spring (733) can with bolt locking block (732) are located when locking groove (15) top, with bolt locking block (732) bullet inside locking groove (15).

9. The intestinal polyp loop ligature device with a bendable top end of claim 8, wherein: trigger connecting rod (8) one end is provided with buffer spring (81), buffer spring (81) with fixed connection between trigger bolt (923), the removal of trigger connecting rod (8) by trigger portion (7) control, through trigger connecting rod (8) the operation of trigger (9) is pricked to cover can be controlled in trigger portion (7).