Loop ligature device with high stability firing mechanism

Abstract

The utility model relates to a kind of high-stability loop ligator firing mechanism, it includes fixed pipe and firing pipe, the side wall of fixed pipe rear end is also fixed and is connected with three-way pipe, the front end of fixed pipe is stretched out outside firing pipe, the part of fixed pipe stretched out outside firing pipe is sleeved with elastic ring;Firing pipe is slidably sleeved outside fixed pipe, sliding slot for the accommodation of connecting column is set on firing pipe, and accommodation slot for the accommodation of three-way pipe;The inner side wall of handle shell both sides is evenly provided with limit plate, the end of firing pipe away from elastic ring is plane, torsional spring is applied to firing pipe, so that firing pipe moves to the direction away from elastic ring, and the side of firing pipe away from elastic ring is in contact with limit plate, at this time, the gap between the inner wall of accommodation slot of firing pipe and the outer circumferential wall of the pipe body of three-way pipe top is provided with clearance.The technical scheme of the present application can limit and guide the activity of firing pipe, avoid the impact between firing pipe and three-way pipe, and ensure the pressure relief effect.

Description

Technical Field

[0001] This utility model relates to the field of ligatures, and in particular to a ligature firing mechanism with high stability. Background Technology

[0002] A ligator is a treatment device used to treat conditions such as polyps and hemorrhoids. When the ligator is working, it is connected to a negative pressure suction device. Under negative pressure, the tissue is sucked up to a state that is easy to ligate, and then the elastic band is ligated and fixed to the root of the tissue.

[0003] In related technologies, refer to Figure 1 The banding device includes a handle housing 1. The front end of the handle housing 1 is provided with a firing component for firing the elastic ring 22. The firing component includes a fixed tube 2 and a firing tube 3. A connecting post 21 is fixedly provided on the side wall of the rear end of the fixed tube 2. The connecting post 21 is fixedly connected to the inner wall of the handle housing 1 to fix the fixed tube 2 to the handle housing 1. The firing tube 3 is slidably sleeved outside the fixed tube 2. A groove 41 is provided on the firing tube 3 to allow the connecting post 21 to move. The front end of the fixed tube 2 extends out of the firing tube 3. An elastic ring 22 is sleeved on the part of the fixed tube 2 that extends out of the firing tube 3.

[0004] The tail end of the fixed tube 2 is connected to and communicates with a suction tube, which is connected to a negative pressure suction machine. A three-way tube 5 is also fixed and communicated on the side wall of the rear end of the fixed tube 2. The top end of the three-way tube 5 is fixedly connected to and communicates with the fixed tube 2. The rear end of the firing tube 3 is provided with a clearance groove 42 for the three-way tube 5 to make way. A sealing plug is provided at the left end of the three-way tube 5. The sealing plug can be inserted into the left end of the three-way tube 5 to seal it so as to ensure or detach from the three-way tube 5 to achieve air release. The right end of the three-way tube 5 is closed.

[0005] The handle housing 1 is provided with a drive assembly for driving the firing tube 3 to slide. The drive assembly includes a wrench 9, a swing shaft and a torsion spring. The swing shaft is located at the middle of the length of the wrench 9 and is rotatably connected to the wrench 9. The swing shaft is fixedly connected to the handle housing 1. The torsion spring is sleeved on the swing shaft. One end of the torsion spring is fixed to the swing shaft and the other end of the torsion spring is fixed to the wrench 9. The force applied by the torsion spring to the wrench 9 causes the top of the wrench 9 to move away from the elastic ring 22. The end of the firing tube 3 away from the elastic ring 22 is provided with a mating groove 43. The top of the wrench is locked in the mating groove 43.

[0006] To prevent excessive friction between the firing tube 3 and the fixed tube 2, and between the firing tube 3 and the handle housing 1 during firing tube movement, which could damage the firing components and the handle housing 1, there is a gap between the firing tube 3 and the fixed tube 2, and also a gap between the firing tube 3 and the handle housing 1.

[0007] When performing the ligation operation, align the opening of the fixing tube 2 with the tissue, then press the bottom end of the wrench 9, the top end of the wrench 9 abuts against the inner wall of the mating groove 43, and push the firing tube toward the direction close to the elastic ring 22. The firing tube 3 quickly slides toward the direction close to the elastic ring 22 and pushes the elastic ring 22 onto the root of the tissue. After the elastic ring 22 tightens the tissue, the operator pulls the tissue off.

[0008] Regarding the aforementioned related technologies, the inventors believe that when the torsion spring moves the firing tube away from the elastic coil, the tube body at the top of the three-way tube abuts against the inner wall of the firing tube's relief groove to limit the firing tube. Since the firing tube will impact the three-way tube every time the wrench is released, the three-way tube will deform over time, affecting the pressure relief effect. Utility Model Content

[0009] To address the aforementioned technical problems, this application provides a highly stable ligator firing mechanism.

[0010] The present application provides a highly stable ligature firing mechanism using the following technical solution:

[0011] A highly stable ligator firing mechanism includes a fixed tube and a firing tube. A connecting post is fixedly connected to the side wall at the rear end of the fixed tube. The connecting post is fixedly connected to the inner wall of the handle housing. A three-way pipe is also fixedly connected to the side wall at the rear end of the fixed tube. The front end of the fixed tube extends out of the firing tube, and an elastic ring is fitted on the part of the fixed tube extending out of the firing tube.

[0012] The firing tube is slidably sleeved outside the fixed tube, and the firing tube is provided with a sliding groove for the connecting column to make way and a clearance groove for the tee tube to make way.

[0013] Limiting plates are provided on the inner walls of both sides of the handle housing. The end of the firing tube away from the elastic ring is flat. The torsion spring applies force to the firing tube, causing it to move away from the elastic ring until the side of the firing tube away from the elastic ring abuts against the limiting plate. At this time, there is a gap between the inner wall of the clearance groove of the firing tube and the outer peripheral wall of the tube at the top of the three-way tube.

[0014] Preferably, a reinforcing grid is provided inside the handle housing, and the side of the limiting plate away from the firing tube in the thickness direction is fixed to the plate of the reinforcing grid near the firing tube.

[0015] Preferably, the connecting post is horizontally positioned, and when the side of the firing tube away from the elastic ring abuts against the limiting plate, the connecting post abuts against the inner wall of the sliding groove near the elastic ring.

[0016] Preferably, the firing tube includes a first ring plate and a second ring plate in a semi-annular shape, and the first ring plate and the second ring plate are fixed by a connecting assembly.

[0017] Preferably, the connecting assembly includes a buckle and a slot, the buckle includes a connecting part and a fixing part connected in a "7" shape, the connecting part is connected to the radial end of the first ring plate, and the fixing part is connected to the end of the connecting part away from the first ring plate;

[0018] The slot is located at the radial end of the second ring plate. The slot is also shaped like a "7". The slot includes a connecting slot and a fixing slot. The connecting slot passes through the side of the second ring plate near the first ring plate. The fixing slot is connected to the end of the connecting slot away from the first ring plate. When the buckle is engaged in the slot, the connecting part is located in the connecting slot and the fixing part is located in the fixing slot.

[0019] Preferably, multiple sets of the connecting components are equidistantly arranged along the axial direction of the firing tube, and buckles are provided at both ends of the first ring plate in the radial direction, with the buckles corresponding one-to-one with the slots.

[0020] Preferably, the end of the fixing part away from the connecting part is arranged in an arc shape.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The movement of the firing tube is limited and guided by the limiting plate and connecting column to avoid collision between the firing tube and the tee pipe and ensure the pressure relief effect;

[0023] 2. When assembling the firing tube and the fixing tube, the first ring plate and the second ring plate are joined together radially along the fixing tube to allow the connecting post to pass through the guide groove. The snap-fit ​​and slot structure allows the first ring plate and the second ring plate to be quickly joined together, improving the ease of assembly. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the firing component of a slinger in the prior art.

[0025] Figure 2 This is a schematic diagram of the overall structure of a highly stable ligator firing mechanism in an embodiment of this application.

[0026] Figure 3 This is a structural schematic diagram used to illustrate the connecting column and the slide in the embodiments of this application.

[0027] Figure 4 This is an exploded structural diagram illustrating the first and second ring plates in an embodiment of this application.

[0028] Figure 5 This is a cross-sectional structural diagram used to illustrate the connecting component in an embodiment of this application.

[0029] Figure 6This is a cross-sectional structural diagram used in the embodiments of this application to show the buckle being engaged in the slot.

[0030] Explanation of reference numerals in the attached drawings: 1. Handle housing; 2. Fixing tube; 21. Connecting post; 22. Elastic ring; 3. Firing tube; 31. First ring plate; 32. Second ring plate; 41. Sliding groove; 42. Relief groove; 43. Mating groove; 5. T-tube; 6. Limiting plate; 7. Reinforcing grille; 8. Connecting assembly; 81. Buckle; 811. Connecting part; 812. Fixing part; 82. Slot; 821. Connecting groove; 822. Fixing groove; 9. Wrench. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 2-6 This application will be described in further detail.

[0032] This application discloses a highly stable ligature firing mechanism.

[0033] Reference Figure 2-6 The highly stable tether firing mechanism includes a fixed tube 2 and a firing tube 3. A connecting post 21 is fixedly connected to the side wall at the rear end of the fixed tube 2. The connecting post 21 is fixedly connected to the inner wall of the handle housing 1. A three-way tube 5 is also fixed and connected to the side wall at the rear end of the fixed tube 2. The front end of the fixed tube 2 extends out of the firing tube 3. An elastic ring 22 is fitted on the part of the fixed tube 2 that extends out of the firing tube 3.

[0034] The firing tube 3 is slidably sleeved outside the fixed tube 2. The firing tube 3 is provided with a sliding groove 41 for the connecting column 21 to make way and a clearance groove 42 for the tee tube 5 to make way.

[0035] Limiting plates 6 are provided on the inner walls of both sides of the handle housing 1. The end of the firing tube 3 away from the elastic ring 22 is flat. The torsion spring applies force to the firing tube 3, causing the firing tube 3 to move away from the elastic ring 22 until the side of the firing tube 3 away from the elastic ring 22 abuts against the limiting plate 6. At this time, there is a gap between the inner wall of the relief groove 42 of the firing tube 3 and the outer peripheral wall of the tube at the top of the three-way pipe 5.

[0036] A reinforcing grid 7 is provided inside the handle housing 1. The side of the limiting plate 6 away from the firing tube 3 in the thickness direction is fixed to the plate of the reinforcing grid 7 near the firing tube 3, which supports the limiting plate 6 and makes the limiting plate 6 more able to withstand the impact of the firing tube 3.

[0037] The connecting post 21 is set horizontally. When the side of the firing tube 3 away from the elastic ring 22 abuts against the limiting plate 6, the connecting post 21 abuts against the inner wall of the slide groove 41 near the end of the elastic ring 22.

[0038] The movement of the firing tube 3 is limited and guided by the limiting plate 6 and the connecting column 21 to avoid collision between the firing tube 3 and the three-way pipe 5, thus ensuring the pressure relief effect.

[0039] The firing tube 3 includes a first ring plate 31 and a second ring plate 32 in a semi-annular shape, and the first ring plate 31 and the second ring plate 32 are fixed by a connecting assembly 8.

[0040] The connecting component 8 includes a buckle 81 and a slot 82. The buckle 81 includes a connecting part 811 and a fixing part 812 connected in a "7" shape. The connecting part 811 is connected to the radial end of the first ring plate 31, and the fixing part 812 is connected to the end of the connecting part 811 away from the first ring plate 31.

[0041] The slot 82 is located at the radial end of the second ring plate 32. The slot 82 is also shaped like a "7". The slot 82 includes a connecting slot 821 and a fixing slot 822. The connecting slot 821 passes through the side of the second ring plate 32 near the first ring plate 31. The fixing slot 822 is connected to the end of the connecting slot 821 away from the first ring plate 31. When the buckle 81 is engaged in the slot 82, the connecting part 811 is located in the connecting slot 821 and the fixing part 812 is located in the fixing slot 822.

[0042] Multiple sets of connecting components 8 are equidistantly arranged along the axial direction of the firing tube 3. Both ends of the first ring plate 31 in the radial direction are provided with buckles 81, and the slots 82 correspond one-to-one with the buckles 81.

[0043] The end of the fixing part 812 away from the connecting part 811 is arranged in an arc shape to improve the smoothness of the insertion of the fixing part 812 into the fixing groove 822.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A highly stable ligature firing mechanism, characterized in that: It includes a fixed tube and a firing tube. A connecting post is fixedly connected to the side wall at the rear end of the fixed tube. The connecting post is fixedly connected to the inner wall of the handle housing. A three-way tube is also fixedly connected to the side wall at the rear end of the fixed tube. The front end of the fixed tube extends out of the firing tube. An elastic ring is fitted on the part of the fixed tube that extends out of the firing tube. The firing tube is slidably sleeved outside the fixed tube, and the firing tube is provided with a sliding groove for the connecting column to make way and a clearance groove for the tee tube to make way. Limiting plates are provided on the inner walls of both sides of the handle housing. The end of the firing tube away from the elastic ring is flat. The torsion spring applies force to the firing tube, causing it to move away from the elastic ring until the side of the firing tube away from the elastic ring abuts against the limiting plate. At this time, there is a gap between the inner wall of the clearance groove of the firing tube and the outer peripheral wall of the tube at the top of the three-way tube.

2. The highly stable ligator firing mechanism according to claim 1, characterized in that: The handle housing is provided with a reinforcing grid, and the side of the limiting plate away from the firing tube in the thickness direction is fixed to the plate of the reinforcing grid near the firing tube.

3. The highly stable ligator firing mechanism according to claim 1, characterized in that: The connecting post is horizontally positioned. When the side of the firing tube away from the elastic ring abuts against the limiting plate, the connecting post abuts against the inner wall of the sliding groove near the elastic ring.

4. The highly stable ligator firing mechanism according to claim 1, characterized in that: The firing tube includes a first ring plate and a second ring plate in a semi-annular shape, which are fixed by a connecting assembly.

5. The highly stable ligator firing mechanism according to claim 4, characterized in that: The connecting assembly includes a buckle and a slot. The buckle includes a connecting part and a fixing part connected in a "7" shape. The connecting part is connected to the radial end of the first ring plate, and the fixing part is connected to the end of the connecting part away from the first ring plate. The slot is located at the radial end of the second ring plate. The slot is also "7" shaped. The slot includes a connecting slot and a fixing slot. The connecting slot passes through the side of the second ring plate near the first ring plate. The fixing slot is connected to the end of the connecting slot away from the first ring plate. When the buckle is engaged in the slot, the connecting part is located in the connecting slot and the fixing part is located in the fixing slot.

6. The highly stable ligator firing mechanism according to claim 5, characterized in that: The connecting components are arranged in multiple sets at equal intervals along the axial direction of the firing tube, and the first ring plate is provided with buckles at both ends of the radial direction, with the buckles corresponding one-to-one with the slots.

7. The highly stable ligator firing mechanism according to claim 5, characterized in that: The end of the fixing part away from the connecting part is arranged in an arc shape.

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