Loop ligature device with running-firing function

Abstract

The utility model relates to a ligation device with a running-firing function, which comprises a handle shell, an extension tube and an outer sleeve are arranged at the front end of the handle shell, the outer sleeve is sleeved outside the extension tube, the extension tube and the handle shell are relatively fixed, the outer sleeve is connected with the extension tube in a sliding manner, and a driving component for driving the outer sleeve to slide is arranged in the handle shell; the extension pipe is sleeved with at least two elastic rings, and the elastic rings are arranged in the axial direction of the extension pipe at equal intervals. A push rod is arranged on the inner wall of the outer sleeve, the end, away from the outer sleeve, of the push rod extends to the elastic ring and abuts against the side, close to the handle shell, of the elastic ring, and when the outer sleeve slides in the direction away from the handle shell, the push rod pushes the corresponding elastic ring in the direction away from the handle shell. And the elastic ring farthest from the handle shell is pushed to the root of the tissue by the push rod. According to the ligation device, the continuous ligation effect can be achieved, and the treatment efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of ligatures, and in particular to a ligature with a continuous firing function. 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, the ligator includes a handle housing, an extension tube is fixedly connected to the front end of the handle housing, a push tube is slidably connected to the extension tube, and an elastic ring is sleeved on the front end of the extension tube. After the push tube is pushed forward, the elastic ring is pushed to be sleeved on the root of the tissue. After the elastic ring tightens the tissue, the operator pulls the tissue off.

[0004] Regarding the aforementioned technologies, after the elastic band on the extension tube is placed on the tissue root, a new elastic band needs to be installed. A new elastic band needs to be installed after each firing, which is cumbersome. When the patient needs continuous treatment, the above-mentioned ligator cannot achieve the effect of continuous ligation. Therefore, a ligator that can achieve the effect of continuous ligation is needed to improve treatment efficiency. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a bandaging device with continuous firing capability.

[0006] The ligator with continuous firing function provided in this application adopts the following technical solution:

[0007] A tether with continuous firing function includes a handle housing, an extension tube and an outer tube provided at the front end of the handle housing, the outer tube being sleeved outside the extension tube, the extension tube being fixed relative to the handle housing, the outer tube being slidably connected to the extension tube, a support strip being provided on the inner wall of the outer tube, the side of the support strip away from the outer tube being in contact with the outer wall of the extension tube, and a drive component for driving the outer tube to slide is provided inside the handle housing;

[0008] The extension tube is fitted with elastic rings, and at least two elastic rings are equidistantly arranged along the axial direction of the extension tube.

[0009] A push rod is provided on the inner wall of the outer sleeve. The end of the push rod away from the outer sleeve extends to the elastic ring and abuts against the side of the elastic ring near the handle housing. The push rod at each elastic ring is located on the side of the corresponding elastic ring near the handle housing. The end of the push rod away from the outer sleeve is inclined in the direction away from the handle housing.

[0010] When the outer sleeve slides away from the handle housing, the push rod pushes the corresponding elastic ring away from the handle housing, and the elastic ring furthest from the handle housing is pushed by the push rod to the root of the tissue;

[0011] When the outer sleeve slides toward the handle housing, the push rod returns to its original position;

[0012] The handle housing is equipped with a negative pressure suction component for suctioning tissue.

[0013] Preferably, the drive assembly includes a drive wrench and a drive spring. The top of the drive wrench is rotatably connected to the handle housing via a torsion spring. The torsion spring applies a force to the drive wrench, causing the end of the drive wrench located outside the handle housing to move upward.

[0014] The top of the drive wrench is flat, and a first locking block is provided on the side of the top of the drive wrench near the elastic ring. A second locking block is provided on the side of the outer sleeve near the first locking block. A first wedge surface is provided on the top of the first locking block on the side near the elastic ring, and a second wedge surface is provided on the top of the second locking block on the side away from the elastic ring.

[0015] A first limiting ring plate is provided on the outer peripheral wall of the outer sleeve, and a second limiting ring plate is provided on the inner wall of the handle housing. The first limiting ring plate is closer to the elastic ring than the second limiting ring plate. The middle part of the drive spring abuts against the first limiting ring plate, and the end of the drive spring away from the elastic ring abuts against the second limiting ring plate.

[0016] Pull the outer tube away from the tissue root until the side of the first locking block away from the elastic ring abuts against the side of the second locking block near the elastic ring. At this time, the drive spring is compressed. After rotating the end of the drive wrench outside the handle housing towards the handle housing, the second locking block disengages from the first locking block. The drive spring, in order to restore its original length, pushes the outer tube towards the tissue root through the first limiting ring plate.

[0017] Preferably, each elastic ring corresponds to multiple push rods, and the multiple push rods at each elastic ring are equidistantly arranged along the circumference of the extension tube.

[0018] Preferably, a buffer block is provided inside the handle housing near the elastic ring. The buffer block is made of rubber material, is annular and is located on the outside of the outer sleeve. There is a gap between the inner peripheral wall of the buffer block and the outer peripheral wall of the outer sleeve. The outer peripheral wall of the buffer block is fixedly connected to the inner wall of the handle housing.

[0019] An abutment plate is fixedly connected to the outer wall of a section of the outer sleeve located inside the handle housing. The abutment plate extends along the axial direction of the outer sleeve. When the drive spring returns to its original length, the side of the abutment plate near the elastic ring abuts against the side of the buffer block away from the elastic ring.

[0020] Preferably, an auxiliary plate is fixedly connected to the end of the abutment plate away from the elastic ring. The auxiliary plate extends radially along the outer sleeve. An auxiliary handle is provided on the auxiliary plate. The auxiliary handle is slidably connected to the handle housing. A clearance hole is provided on the handle housing for the auxiliary plate to slide. The clearance hole extends axially along the outer sleeve.

[0021] Preferably, the abutment plates are symmetrically arranged on both sides of the handle housing in the radial direction, one abutment plate corresponds to one auxiliary plate, one auxiliary plate corresponds to one auxiliary handle, and the end of the auxiliary handle away from the outer tube is bent toward the direction close to the elastic ring.

[0022] Preferably, the elastic ring is mounted on the extension tube via a mounting assembly;

[0023] The mounting assembly includes a mounting tube and a limiting plug. The mounting tube is inserted into the outer tube and coaxially connected to the limiting tube. The outer diameter of the limiting tube is smaller than the outer diameter of the mounting tube. The limiting tube is inserted into the extension tube and a limiting component is provided on the limiting tube. The limiting tube is fixed in the extension tube by the limiting component.

[0024] The limiting plug includes a circular plate, a dustproof ring plate, and a cross rod. The dustproof ring plate is coaxially connected to the end of the circular plate near the extension tube and is sleeved on the mounting tube. The cross rod is coaxially connected to the end of the circular plate near the extension tube and is inserted into the mounting tube.

[0025] The limiting component includes a limiting block, which is fixedly connected to the outer wall of the limiting tube. The inner wall of the extension tube is provided with a clearance groove for the limiting block to pass through along the axial direction of the extension tube and a limiting groove for the limiting block to slide along the circumferential direction of the extension tube. The clearance groove passes through the end of the extension tube away from the handle body, and the limiting groove is connected to the clearance groove.

[0026] The inner wall of the limiting groove is provided with a limiting protrusion. After the limiting block rotates to abut against the inner wall of the radial end of the limiting groove, the limiting block is locked between the inner wall of the limiting groove and the limiting protrusion.

[0027] The installation pipe includes a first pipe section and a second pipe section. The outer diameter of the first pipe section is larger than the outer diameter of the second pipe section, and the outer diameter of the second pipe section is larger than the outer diameter of the limiting pipe. The outer walls of the first pipe section and the second pipe section are smoothly connected. When the limiting block is located in the limiting groove, the side of the second pipe section away from the first pipe section abuts against the side of the extension pipe close to the installation pipe.

[0028] The elastic ring is fitted onto the second tube segment, and the push rod pushes the elastic ring from the second tube segment to the root of the patient's tissue.

[0029] The outer peripheral wall of the second pipe section is provided with a positioning ring groove for embedding the elastic ring, and the inner peripheral wall of the elastic ring is embedded in the positioning ring groove.

[0030] Preferably, the negative pressure suction assembly includes a suction tube, an auxiliary tube, a vent tube, and a connecting tube. One end of the suction tube is connected to and communicates with the end of the extension tube that extends into the handle housing. The end of the suction tube away from the extension tube is sealed. The side wall of the suction tube is fixed to the inner wall of the handle housing. One end of the auxiliary tube is connected to and communicates with the side wall of the suction tube. The vent tube is a T-junction. The other end of the auxiliary tube is inserted into and communicates with the first port of the vent tube. One end of the connecting tube is inserted into and communicates with the second port of the vent tube. The other end of the connecting tube extends to the outside of the handle housing and is connected to a negative pressure suction machine. A venting component is provided at the third port of the vent tube. The side wall of the vent tube is fixed to the inner wall of the handle housing.

[0031] The venting component is plate-shaped, and the side wall of the middle part of the venting component is rotatably connected to the handle housing. A sealing plug is provided on the side of the venting component located inside the handle housing. The end of the sealing plug away from the venting component is interference-fitted into the opening of the venting pipe. The venting component is rotated until the sealing plug is inserted into the venting pipe or detached from the venting pipe.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. Pull the outer tube away from the root of the patient tissue using the auxiliary handle, so that the second locking block on the outer tube locks onto the side of the first locking block on the drive wrench away from the patient tissue. At this time, the drive spring is compressed, and then the tissue is sucked up by the negative pressure suction component. Then, press down on the drive wrench to disengage the second locking block from the first locking block. In order to restore the original length, the drive spring pushes the outer tube towards the direction closer to the patient tissue through the first limiting ring plate. The push rod pushes the corresponding elastic ring towards the direction closer to the root of the tissue. Each elastic ring moves towards the direction closer to the root of the tissue. The elastic ring furthest from the handle housing moves from the mounting tube to the root of the tissue. The elastic ring that was originally located after the one furthest from the handle housing moves towards the direction closer to the root of the tissue to the current position furthest from the handle housing.

[0034] After the drive wrench is released, it returns to its original position under the action of the torsion spring.

[0035] When another tissue needs to be ligated, pull the outer tube away from the patient's tissue again, so that the second locking block on the outer tube locks onto the side of the first locking block on the drive plate away from the patient's tissue. At this time, the drive spring is compressed again. Then, press the drive wrench down again to fire the next elastic coil to the root of another tissue, thus achieving the effect of continuous ligation treatment and improving treatment efficiency.

[0036] 2. During the process of the drive spring returning to its original length, the final contact plate comes into contact with the buffer block, reducing the possibility of hard contact between the drive spring and the inner wall of the handle housing, which would cause the ligator to vibrate as a whole. This keeps the ligator stable during use, reduces vibration, and improves patient comfort. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of a ligator with continuous firing function in an embodiment of this application.

[0038] Figure 2 This is a schematic diagram illustrating the internal structure of the handle housing in an embodiment of this application.

[0039] Figure 3 This is a schematic diagram illustrating the structure of the first card block and the second card block in an embodiment of this application.

[0040] Figure 4 This is an exploded structural diagram used in the embodiments of this application to illustrate the installation pipe and the extension pipe.

[0041] Figure 5 This is an exploded structural diagram of the limiting plug and the installation tube used in the embodiments of this application.

[0042] Figure 6 This is a schematic diagram illustrating the structure of the sealing element in an embodiment of this application.

[0043] Explanation of reference numerals in the attached drawings: 1. Handle housing; 11. Second limiting ring plate; 12. Buffer block; 13. Clearance hole; 2. Extension tube; 21. Clearance groove; 22. Limiting groove; 221. Limiting protrusion; 3. Outer tube; 31. Support bar; 32. Second locking block; 33. First limiting ring plate; 4. Drive assembly; 41. Drive wrench; 411. First locking block; 42. Drive spring; 5. Elastic ring; 6. Push rod; 61. Observation slot; 7. Abutment plate; 71. Auxiliary plate; 72. Auxiliary handle; 8. Installation assembly; 81. Installation pipe; 811. Limiting pipe; 812. First pipe section; 813. Second pipe section; 8131. Positioning ring groove; 82. Limiting plug; 821. Circular plate; 822. Dustproof ring plate; 823. Cross rod; 83. Limiting block; 9. Negative pressure suction assembly; 91. Suction pipe; 92. Auxiliary pipe; 93. Venting pipe; 94. Connecting pipe; 95. Venting component; 96. Sealing plug. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0045] This application discloses a bandage device with continuous firing function.

[0046] Reference Figure 1-6 The tether with continuous firing function includes a handle housing 1. The front end of the handle housing 1 is provided with an extension tube 2 and an outer tube 3. The outer tube 3 is sleeved outside the extension tube 2. The extension tube 2 is fixed relative to the handle housing 1. The outer tube 3 is slidably connected to the extension tube 2. A support strip 31 is fixed on the inner wall of the outer tube 3. The side of the support strip 31 away from the outer tube 3 is in contact with the outer wall of the extension tube 2. A drive assembly 4 for driving the outer tube 3 to slide is provided inside the handle housing 1.

[0047] An elastic ring 5 is fitted on the extension tube 2. At least two elastic rings 5 ​​are equidistantly arranged along the axial direction of the extension tube 2. In this embodiment, there are two elastic rings 5.

[0048] A push rod 6 is provided on the inner wall of the outer tube 3. The end of the push rod 6 away from the outer tube 3 extends to the elastic ring 5 and abuts against the side of the elastic ring 5 near the handle housing 1. The push rod 6 at each elastic ring 5 is located on the side of the corresponding elastic ring 5 near the handle housing 1, and the end of the push rod 6 away from the outer tube 3 is inclined in the direction away from the handle housing 1. An observation slot 61 is provided at the push rod 6. The observation slot 61 is "U" shaped and penetrates both sides of the outer tube 3 in the thickness direction. The observation slot 61 not only facilitates the observation of the extension tube 2, but also provides elasticity between the push rod 6 and the outer tube 3.

[0049] Each elastic ring 5 corresponds to multiple push rods 6. The multiple push rods 6 at each elastic ring 5 are equidistantly arranged along the circumference of the extension tube 2 to ensure that the elastic ring 5 is subjected to uniform force.

[0050] When the outer tube 3 slides away from the handle housing 1, the push rod 6 pushes the corresponding elastic ring 5 away from the handle housing 1, and the elastic ring 5 furthest from the handle housing 1 is pushed by the push rod 6 to the root of the tissue. When the outer tube 3 slides closer to the handle housing 1, the push rod 6 returns to its original position.

[0051] The drive assembly 4 includes a drive wrench 41 and a drive spring 42. The top of the drive wrench 41 is rotatably connected to the handle housing 1 via a torsion spring. The torsion spring applies a force to the drive wrench 41, causing the end of the drive wrench 41 located outside the handle housing 1 to move upward.

[0052] The top of the drive wrench 41 is flat. A first locking block 411 is provided on the side of the top of the drive wrench 41 near the elastic ring 5. A second locking block 32 is provided on the side of the outer tube 3 near the first locking block 411. A first wedge surface is provided on the top of the first locking block 411 near the elastic ring 5. A second wedge surface is provided on the top of the second locking block 32 away from the elastic ring 5.

[0053] A first limiting ring plate 33 is provided on the outer peripheral wall of the outer sleeve 3, and a second limiting ring plate 11 is provided on the inner wall of the handle housing 1. The first limiting ring plate 33 is closer to the elastic ring 5 than the second limiting ring plate 11. The middle part of the drive spring 42 abuts against the first limiting ring plate 33, and the end of the drive spring 42 away from the elastic ring 5 abuts against the second limiting ring plate 11.

[0054] Pull the outer tube 3 away from the tissue root until the side of the first locking block 411 away from the elastic ring 5 abuts against the side of the second locking block 32 near the elastic ring 5. At this time, the drive spring 42 is compressed. After rotating the end of the drive wrench 41 outside the handle housing 1 towards the direction closer to the handle housing 1, the second locking block 32 disengages from the first locking block 411. In order to restore its original length, the drive spring 42 pushes the outer tube 3 towards the direction closer to the tissue root through the first limiting ring plate 33.

[0055] A buffer block 12 is provided inside the handle housing 1 near the elastic ring 5. The buffer block 12 is made of rubber material, is annular and is located on the outside of the outer sleeve 3. There is a gap between the inner peripheral wall of the buffer block 12 and the outer peripheral wall of the outer sleeve 3. The outer peripheral wall of the buffer block 12 is fixedly connected to the inner wall of the handle housing 1.

[0056] An abutment plate 7 is fixedly connected to the outer wall of the outer sleeve 3 located inside the handle housing 1. The abutment plate 7 extends along the axial direction of the outer sleeve 3. When the drive spring 42 returns to its original length, the side of the abutment plate 7 close to the elastic ring 5 abuts against the side of the buffer block 12 away from the elastic ring 5.

[0057] During the process of the drive spring 42 returning to its original length, the final contact plate 7 comes into contact with the buffer block 12, which reduces the possibility of hard contact between the drive spring 42 and the inner wall of the handle housing 1, causing the entire ligator to vibrate. This keeps the ligator stable during use, reduces vibration, and improves patient comfort.

[0058] An auxiliary plate 71 is fixedly connected to the end of the abutment plate 7 away from the elastic ring 5. The auxiliary plate 71 extends radially along the outer sleeve 3. An auxiliary handle 72 is provided on the auxiliary plate 71. The auxiliary handle 72 is slidably connected to the handle housing 1. The handle housing 1 has a clearance hole 13 for the auxiliary plate 71 to slide. The clearance hole 13 extends axially along the outer sleeve 3. The end of the auxiliary handle 72 away from the outer sleeve 3 is bent towards the elastic ring 5, making it convenient for the operator to move the outer sleeve 3.

[0059] Pull the outer tube 3 away from the root of the patient tissue by using the auxiliary handle 72, so that the second locking block 32 on the outer tube 3 is locked on the side of the first locking block 411 on the drive wrench 41 away from the patient tissue. At this time, the drive spring 42 is compressed, and then the tissue is sucked up by the negative pressure suction component 9. Then, the drive wrench 41 is pressed down, so that the second locking block 32 is disengaged from the first locking block 411. In order to restore its original length, the drive spring 42 pushes the outer tube 3 towards the direction closer to the patient tissue through the first limiting ring plate 33. The push rod 6 pushes the corresponding elastic ring 5 towards the direction closer to the root of the tissue. Each elastic ring 5 moves towards the direction closer to the root of the tissue. The elastic ring 5 furthest from the handle housing 1 moves from the mounting tube to the root of the tissue. The elastic ring 5 that was originally located after the one furthest from the handle housing 1 moves towards the direction closer to the root of the tissue to the current position furthest from the handle housing 1.

[0060] After the drive wrench 41 is released, the drive wrench 41 returns to its original position under the action of the torsion spring.

[0061] When another tissue needs to be ligated again, the outer tube 3 is pulled away from the patient tissue again, so that the second locking block 32 on the outer tube 3 is locked on the side of the first locking block 411 on the drive plate away from the patient tissue. At this time, the drive spring 42 is compressed again, and then the drive wrench 41 is pressed down again to make the next elastic ring 5 strike the root of another tissue, thus achieving the effect of continuous ligation treatment and improving treatment efficiency.

[0062] The elastic ring 5 is mounted on the extension tube 2 via the mounting component 8.

[0063] Mounting assembly 8 includes mounting tube 81 and limiting plug 82. Mounting tube 81 is inserted into outer sleeve 3. Mounting tube 81 is coaxially connected to limiting tube 811. The outer diameter of limiting tube 811 is smaller than the outer diameter of mounting tube 81. Limiting tube 811 is inserted into extension tube 2. Limiting component is provided on limiting tube 811. Limiting tube 811 is fixed in extension tube 2 by limiting component.

[0064] The limiting plug 82 includes a circular plate 821, a dustproof ring plate 822, and a cross rod 823. The dustproof ring plate 822 is coaxially connected to the end of the circular plate 821 near the extension tube 2 and is sleeved on the mounting tube 81. The cross rod 823 is coaxially connected to the end of the circular plate 821 near the extension tube 2 and is inserted into the mounting tube 81.

[0065] The limiting component includes a limiting block 83, which is fixedly connected to the outer wall of the limiting tube 811. The inner wall of the extension tube 2 has a clearance groove 21 for the limiting block 83 to pass through axially along the extension tube 2, and a limiting groove 22 for the limiting block 83 to slide circumferentially along the extension tube 2. The clearance groove 21 passes through the end of the extension tube 2 away from the handle body, and the limiting groove 22 communicates with the clearance groove 21. A limiting protrusion 221 is provided on the inner wall of the limiting groove 22. After the limiting block 83 rotates until it abuts against the inner wall of the radial end of the limiting groove 22, the limiting block 83 is engaged between the inner wall of the limiting groove 22 and the limiting protrusion 221.

[0066] The installation tube 81 includes a first tube section 812 and a second tube section 813. The outer diameter of the first tube section 812 is larger than the outer diameter of the second tube section 813. After the elastic ring 5 is fired, the first tube section 812 expands the inner diameter of the elastic ring 5, making it easier for the elastic ring 5 to be wrapped around the tissue root. The outer diameter of the second tube section 813 is larger than the outer diameter of the limiting tube 811. When the limiting block 83 is located in the limiting groove 22, the side of the second tube section 813 away from the first tube section 812 abuts against the side of the extension tube 2 close to the installation tube 81.

[0067] The elastic coil 5 is fitted onto the second tube segment 813, and the push rod 6 pushes the elastic coil 5 from the second tube segment 813 to the root of the patient's tissue. Compared to initially placing the elastic coil 5 on the first tube segment 812, initially placing the elastic coil 5 on the second tube segment 813 can avoid fatigue of the elastic coil 5 and reduce its contractile ability.

[0068] The outer walls of the first pipe section 812 and the second pipe section 813 are smoothly connected, ensuring a smooth firing process for the elastic ring 5.

[0069] The outer peripheral wall of the second tube section 813 is provided with a positioning ring groove 8131 for the elastic ring 5 to be embedded. The inner peripheral wall of the elastic ring 5 is partially embedded in the positioning ring groove 8131. When the elastic ring 5 furthest from the handle housing 1 moves to the tissue, the elastic ring 5 closest to the handle housing 1 moves to the position of the elastic ring 5 furthest from the handle housing 1 and is locked in the positioning ring groove 8131, preventing the push rod 6 from pushing the elastic ring 5 toward the direction closer to the handle housing 1 when it resets.

[0070] When installing the elastic ring 5, slip the elastic ring 5 onto the limiting tube 811 and move it towards the installation tube 81 to the positioning ring groove 8131 of the second section 813 of the installation tube 81. Then, insert the limiting tube 811 into the extension tube 2 and rotate the installation tube 81 until the limiting block 83 is locked between the inner wall of the limiting groove 22 and the limiting protrusion 221, thus fixing the installation tube 81. When using a slinger, simply pull the limiting plug 82 off the installation tube 81. When the elastic ring 5 needs to be replaced, simply remove the installation tube 81 from the extension tube 2. Compared to directly opening the elastic ring 5 and slipping it onto the extension tube 2, moving the elastic ring 5 onto the installation tube 81 via the limiting tube 811 is more convenient, faster, and has a lower error rate, improving the operability and ease of operation for replacing the elastic ring 5.

[0071] The handle housing 1 is equipped with a negative pressure suction component 9 for suctioning tissue.

[0072] The negative pressure suction assembly 9 includes a suction tube 91, an auxiliary tube 92, a vent tube 93, and a connecting tube 94. One end of the suction tube 91 is connected to and communicates with the end of the extension tube 2 that extends into the handle housing 1. The end of the suction tube 91 away from the extension tube 2 is sealed. The side wall of the suction tube 91 is fixed to the inner wall of the handle housing 1 by a cross bar. One end of the auxiliary tube 92 is connected to and communicates with the side wall of the suction tube 91. The vent tube 93 is a three-way tube, and the upper port of the vent tube 93 is the first port of the vent tube 93 for venting. The lower end of the tube 93 is the second port of the vent tube 93, the left end of the vent tube 93 is the third port of the vent tube 93, the other end of the auxiliary tube 92 is inserted into and connected to the first port of the vent tube 93, one end of the connecting tube 94 is inserted into and connected to the second port of the vent tube 93, the other end of the connecting tube 94 extends to the outside of the handle housing 1 and is connected to the negative pressure suction machine, a venting component 95 is provided at the third port of the vent tube 93, and the side wall of the vent tube 93 is fixed to the inner wall of the handle housing 1 by a side support rod.

[0073] The venting component 95 is plate-shaped. The side wall of the middle part of the venting component 95 is rotatably connected to the handle housing 1. A sealing plug 96 is provided on the side of the venting component 95 located inside the handle housing 1. The end of the sealing plug 96 away from the venting component 95 is interference-fitted into the opening of the venting pipe 93. The venting component 95 is rotated until the sealing plug 96 is inserted into or removed from the venting pipe 93. When the bottom end of the venting component 95 is rotated downward, the sealing plug 96 is inserted into the venting pipe 93. When the top end of the venting component 95 is rotated upward, the sealing plug 96 is removed from the venting pipe 93.

[0074] Before ligating the tissue, the sealing plug 96 is inserted into the vent pipe 93. The negative pressure suction machine is started, so that the tissue is sucked up under negative pressure to a state that is easy to ligate. After the operation, the venting component 95 is rotated until the sealing plug 96 is removed from the vent pipe 93 to release the pressure.

[0075] The implementation principle of a ligation device with continuous firing function in this application embodiment is as follows:

[0076] During the procedure, the tissue is first sucked up by the negative pressure suction component 9. Then, the outer tube 3 is pulled away from the root of the patient's tissue by the auxiliary handle 72, so that the second locking block 32 on the outer tube 3 is locked onto the side of the first locking block 411 on the drive wrench 41 away from the patient's tissue. At this time, the drive spring 42 is compressed. Then, the tissue is sucked up by the negative pressure suction component 9. Then, the drive wrench 41 is pressed down, so that the second locking block 32 is disengaged from the first locking block 411. In order to restore its original length, the drive spring 42 pushes the outer tube 3 towards the direction closer to the patient's tissue through the first limiting ring plate 33. The push rod 6 pushes the corresponding elastic ring 5 towards the direction closer to the root of the tissue. Each elastic ring 5 moves towards the direction closer to the root of the tissue. The elastic ring 5 furthest from the handle housing 1 moves from the mounting tube to the root of the tissue. The elastic ring 5 that was originally located after the one furthest from the handle housing 1 moves towards the direction closer to the root of the tissue to the current position furthest from the handle housing 1.

[0077] After the drive wrench 41 is released, the drive wrench 41 returns to its original position under the action of the torsion spring.

[0078] When another tissue needs to be ligated again, the outer tube 3 is pulled away from the patient tissue again by the auxiliary handle 72, so that the second locking block 32 on the outer tube 3 is locked on the side of the first locking block 411 on the drive plate away from the patient tissue. At this time, the drive spring 42 is compressed again, and then the drive wrench 41 is pressed down again to make the next elastic ring 5 strike the root of another tissue.

[0079] 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 ligator with continuous firing function, characterized in that: The device includes a handle housing (1), with an extension tube (2) and an outer tube (3) at the front end of the handle housing (1). The outer tube (3) is sleeved on the outside of the extension tube (2). The extension tube (2) is fixed relative to the handle housing (1). The outer tube (3) is slidably connected to the extension tube (2). A support strip (31) is provided on the inner wall of the outer tube (3). The side of the support strip (31) away from the outer tube (3) is in contact with the outer wall of the extension tube (2). A drive assembly (4) for driving the outer tube (3) to slide is provided inside the handle housing (1). The extension tube (2) is fitted with an elastic ring (5), and at least two elastic rings (5) are equidistantly arranged along the axial direction of the extension tube (2); A push rod (6) is provided on the inner wall of the outer tube (3). The end of the push rod (6) away from the outer tube (3) extends to the elastic ring (5) and abuts against the side of the elastic ring (5) near the handle housing (1). The push rod (6) at each elastic ring (5) is located on the side of the corresponding elastic ring (5) near the handle housing (1). The end of the push rod (6) away from the outer tube (3) is inclined in the direction away from the handle housing (1). When the outer tube (3) slides away from the handle housing (1), the push rod (6) pushes the corresponding elastic ring (5) away from the handle housing (1), and the elastic ring (5) furthest from the handle housing (1) is pushed by the push rod (6) to the root of the tissue. When the outer sleeve (3) slides toward the handle housing (1), the push rod (6) returns to its original position; The handle housing (1) is provided with a negative pressure suction component (9) for suctioning tissue.

2. The ligator with continuous firing function according to claim 1, characterized in that: The drive assembly (4) includes a drive wrench (41) and a drive spring (42). The top of the drive wrench (41) is rotatably connected to the handle housing (1) via a torsion spring. The torsion spring applies a force to the drive wrench (41) to move the end of the drive wrench (41) outside the handle housing (1) upward. The top of the drive wrench (41) is flat. A first locking block (411) is provided on the side of the top of the drive wrench (41) near the elastic ring (5). A second locking block (32) is provided on the side of the outer sleeve (3) near the first locking block (411). A first wedge surface is provided on the top of the first locking block (411) near the elastic ring (5). A second wedge surface is provided on the top of the second locking block (32) away from the elastic ring (5). A first limiting ring plate (33) is provided on the outer peripheral wall of the outer sleeve (3), and a second limiting ring plate (11) is provided on the inner wall of the handle housing (1). The first limiting ring plate (33) is closer to the elastic ring (5) than the second limiting ring plate (11). The middle part of the drive spring (42) abuts against the first limiting ring plate (33), and the end of the drive spring (42) away from the elastic ring (5) abuts against the second limiting ring plate (11). Pull the outer tube (3) away from the tissue root until the side of the first locking block (411) away from the elastic ring (5) abuts against the side of the second locking block (32) near the elastic ring (5). At this time, the drive spring (42) is compressed. After rotating the end of the drive wrench (41) outside the handle housing (1) towards the handle housing (1), the second locking block (32) disengages from the first locking block (411). The drive spring (42) pushes the outer tube (3) towards the tissue root through the first limiting ring plate (33) to restore its original length.

3. The ligator with continuous firing function according to claim 2, characterized in that: Each elastic ring (5) corresponds to multiple push rods (6), and the multiple push rods (6) at each elastic ring (5) are equidistantly arranged along the circumference of the extension tube (2).

4. The ligator with continuous firing function according to claim 2, characterized in that: A buffer block (12) is provided inside the handle housing (1) near the elastic ring (5). The buffer block (12) is made of rubber material. The buffer block (12) is annular and is located on the outside of the outer sleeve (3). There is a gap between the inner peripheral wall of the buffer block (12) and the outer peripheral wall of the outer sleeve (3). The outer peripheral wall of the buffer block (12) is fixedly connected to the inner wall of the handle housing (1). An abutment plate (7) is fixedly connected to the outer wall of the outer sleeve (3) located inside the handle housing (1). The abutment plate (7) extends along the axial direction of the outer sleeve (3). When the drive spring (42) returns to its original length, the side of the abutment plate (7) close to the elastic ring (5) abuts against the side of the buffer block (12) away from the elastic ring (5).

5. The ligator with continuous firing function according to claim 4, characterized in that: An auxiliary plate (71) is fixedly connected to one end of the abutment plate (7) away from the elastic ring (5). The auxiliary plate (71) extends radially along the outer sleeve (3). An auxiliary handle (72) is provided on the auxiliary plate (71). The auxiliary handle (72) is slidably connected to the handle housing (1). A clearance hole (13) for the auxiliary plate (71) to slide is provided on the handle housing (1). The clearance hole (13) extends axially along the outer sleeve (3).

6. The ligator with continuous firing function according to claim 5, characterized in that: The abutment plates (7) are symmetrically arranged on both sides of the handle housing (1) in the radial direction. One abutment plate (7) corresponds to one auxiliary plate (71), and one auxiliary plate (71) corresponds to one auxiliary handle (72). The end of the auxiliary handle (72) away from the outer tube (3) is bent toward the direction close to the elastic ring (5).

7. The ligator with continuous firing function according to claim 1, characterized in that: The elastic ring (5) is mounted on the extension tube (2) via the mounting assembly (8); The mounting assembly includes a mounting tube and a limiting plug. The mounting tube is inserted into the outer tube and coaxially connected to the limiting tube. The outer diameter of the limiting tube is smaller than the outer diameter of the mounting tube. The limiting tube is inserted into the extension tube and a limiting component is provided on the limiting tube. The limiting tube is fixed in the extension tube by the limiting component. The limiting plug includes a circular plate, a dustproof ring plate, and a cross rod. The dustproof ring plate is coaxially connected to the end of the circular plate near the extension tube and is sleeved on the mounting tube. The cross rod is coaxially connected to the end of the circular plate near the extension tube and is inserted into the mounting tube. The limiting component includes a limiting block, which is fixedly connected to the outer wall of the limiting tube. The inner wall of the extension tube is provided with a clearance groove for the limiting block to pass through along the axial direction of the extension tube and a limiting groove for the limiting block to slide along the circumferential direction of the extension tube. The clearance groove passes through the end of the extension tube away from the handle body, and the limiting groove is connected to the clearance groove. The inner wall of the limiting groove is provided with a limiting protrusion. After the limiting block rotates to abut against the inner wall of the radial end of the limiting groove, the limiting block is locked between the inner wall of the limiting groove and the limiting protrusion. The installation pipe includes a first pipe section and a second pipe section. The outer diameter of the first pipe section is larger than the outer diameter of the second pipe section, and the outer diameter of the second pipe section is larger than the outer diameter of the limiting pipe. The outer walls of the first pipe section and the second pipe section are smoothly connected. When the limiting block is located in the limiting groove, the side of the second pipe section away from the first pipe section abuts against the side of the extension pipe close to the installation pipe. The elastic ring is fitted onto the second tube segment, and the push rod pushes the elastic ring from the second tube segment to the root of the patient's tissue. The outer peripheral wall of the second pipe section is provided with a positioning ring groove for embedding the elastic ring, and the inner peripheral wall of the elastic ring is embedded in the positioning ring groove.

8. The ligator with continuous firing function according to claim 1, characterized in that: The negative pressure suction assembly (9) includes a suction tube (91), an auxiliary tube (92), a vent tube (93), and a connecting tube (94). One end of the suction tube (91) is connected to and communicates with the end of the extension tube (2) that extends into the handle housing (1). The end of the suction tube (91) away from the extension tube (2) is sealed. The side wall of the suction tube (91) is fixed to the inner wall of the handle housing (1). One end of the auxiliary tube (92) is connected to and communicates with the side wall of the suction tube (91). The vent pipe (93) is a three-way pipe. The other end of the auxiliary pipe (92) is inserted into and connected to the first port of the vent pipe (93). One end of the connecting pipe (94) is inserted into and connected to the second port of the vent pipe (93). The other end of the connecting pipe (94) extends to the outside of the handle housing (1) and is connected to a negative pressure suction machine. A venting component (95) is provided at the third port of the vent pipe (93). The side wall of the vent pipe (93) is fixed to the inner wall of the handle housing (1). The venting component (95) is plate-shaped. The side wall of the middle part of the venting component (95) is rotatably connected to the handle housing (1). A sealing plug (96) is provided on the side of the venting component (95) located inside the handle housing (1). The end of the sealing plug (96) away from the venting component (95) is interference-fitted into the opening of the venting pipe (93). The venting component (95) is rotated until the sealing plug (96) is inserted into or detached from the venting pipe (93).

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