Electric negative pressure loop ligature device convenient to operate

Abstract

The utility model relates to an electric negative pressure loop ligature device convenient to operate, which comprises a handle main body, the front end of the handle main body is fixedly connected with an extension tube, a push tube is arranged on the extension tube in a sliding manner, and the push tube slides along the axial direction of the extension tube through a driving component; the handle body comprises a handle shell, a negative pressure pump and a battery are arranged in the handle shell, the negative pressure pump is electrically connected with the battery, the air inlet end of the negative pressure pump is communicated with the extension pipe through an air suction pipe, an air leakage pipe is arranged on the air suction pipe, and an air leakage piece is arranged on the air leakage pipe; an elastic rope is arranged at the front end of the extension pipe and comprises a ring body part and a line body part, the ring body part is arranged on the extension pipe through an installation assembly, the line body part is connected with an auxiliary rod, the line body part is fixedly connected with the auxiliary rod, and the auxiliary rod abuts against the side of the push rod. The loop ligature device has the effect of improving the operation convenience of the loop ligature device.

Description

Technical Field

[0001] The utility model relates to the technical field of ligatures, in particular to an electric negative pressure ligature which is easy to operate. Background Art

[0002] The ligation device is a therapeutic device used to treat polyps, hemorrhoids and other diseases. When the ligation device is working, it is connected to the negative pressure suction device. Under the action of negative pressure, the tissue is sucked up to a state that is convenient for ligation, and then the elastic ring is ligated and fixed at the root of the tissue.

[0003] In the related art, the ligation device includes a handle body, the front end of the handle body is fixedly connected to an extension tube, the extension tube is slidably connected to a push tube, the front end of the extension tube is sleeved with an elastic ring, and after the push tube is pushed forward, the elastic ring is pushed to be sleeved on the root of the tissue, and after the elastic ring tightens the tissue, the operator pulls the tissue off.

[0004] Usually, the negative pressure suction device is located outside the ligation device, and is connected to the extension tube through a suction tube. The operator is restricted by the suction tube and the negative pressure suction device during the operation, which makes the operation inconvenient. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides an electric negative pressure ligation device that is easy to operate.

[0006] The present application provides an easy-to-operate electric negative pressure ligation device that adopts the following technical solution:

[0007] An electric negative pressure ligation device that is easy to operate, comprising a handle body, the front end of which is fixedly connected to an extension tube, a push tube is slidably arranged on the extension tube, and the push tube slides along the axial direction of the extension tube through a driving assembly;

[0008] The handle body comprises a handle housing, a negative pressure pump and a battery are arranged in the handle housing, the negative pressure pump and the battery are electrically connected, the air inlet end of the negative pressure pump is connected with the extension tube through the air suction pipe, the air suction pipe is provided with an air discharge pipe, the air discharge pipe is provided with an air discharge member, the air discharge member is in the shape of a plate, one end of the air discharge member is rotatably connected to the handle housing, the other end of the air discharge member is provided with a sealing plug, the sealing plug is interference-fitted in an opening at one end of the air discharge pipe away from the air suction pipe, the air discharge member is rotated until the sealing plug is inserted into the air discharge pipe or detached from the air discharge pipe;

[0009] An elastic rope is arranged at the front end of the extension tube, and the elastic rope includes a ring body part and a wire body part. The ring body part is arranged on the extension tube through an installation assembly, and the wire body part is connected to an auxiliary rod. The wire body part is fixedly connected to the auxiliary rod, and the auxiliary rod is close to the push rod.

[0010] Preferably, the driving assembly includes an integrally formed wrench, a connecting rod and a driving rod, and the wrench, connecting rod and driving rod are overall in a "Z" shape, and the wrench is rotatably located outside the handle housing; a rotating shaft is provided on the connecting rod, and the rotating shaft is fixedly connected to the handle housing, and the connecting rod is rotatably connected to the rotating shaft; an accommodating groove is provided on the outer wall of the push tube close to one end of the handle body, and the end of the driving rod away from the connecting plate is located in the accommodating groove; a reset torsion spring is provided on the rotating shaft, one end of the reset torsion spring is fixed to the connecting rod, and the other end of the reset torsion spring is fixed to the handle housing, and the force applied by the reset torsion spring to the rotating shaft causes the wrench to move in a direction away from the handle body.

[0011] Preferably, the mounting assembly comprises a mounting tube and a stopper, the mounting tube is inserted in the push tube, the mounting tube is coaxially connected to the stopper, the outer diameter of the stopper is smaller than the outer diameter of the mounting tube, the stopper is inserted in the extension tube, the stopper is provided with a stopper assembly, and the stopper is fixed in the extension tube through the stopper assembly;

[0012] The limit plug includes a plug head, a limit ring, and a cross rod. The limit ring is coaxially connected to one end of the plug head close to the extension tube. The limit ring is sleeved on the mounting tube. The ring body of the elastic rope is located between the limit ring and the push tube.

[0013] The cross rod is coaxially connected to one end of the plug close to the extension tube and the cross rod is inserted into the mounting tube. A positioning plate is provided at one end of the cross rod away from the mounting tube. The cross rod includes four integrally formed unit plates. The positioning plate is fixedly connected to each unit plate, and the positioning plate abuts against one end of the mounting tube away from the extension tube.

[0014] Preferably, the limit assembly comprises a limit block, the limit block is fixedly connected to the outer wall of the limit tube, the inner wall of the extension tube is provided with a clearance groove for the limit block to penetrate along the axial direction of the extension tube, and a limit groove for the limit block to slide along the circumferential direction of the extension tube, the clearance groove penetrates one end of the extension tube away from the handle body, and the limit groove is communicated with the clearance groove;

[0015] A limiting protrusion is arranged on the inner wall of the limiting groove. After the limiting block rotates until the limiting block abuts against the inner wall of one radial end of the limiting groove, the limiting block is clamped between the inner wall of the limiting groove and the limiting protrusion.

[0016] Preferably, the limiting blocks are symmetrically arranged on both sides of the limiting tube in the radial direction, and the giving grooves, limiting grooves and limiting protrusions all correspond to the limiting blocks one by one.

[0017] Preferably, a positioning ring is provided on the outer peripheral wall of the limiting tube, and when the limiting block is located in the limiting groove, a side of the positioning ring away from the mounting tube abuts against a side of the extension tube close to the mounting tube.

[0018] Preferably, a transition inclined surface is provided between the mounting pipe and the positioning ring platform, and the transition inclined surface is arranged in a reducing manner along the direction from the mounting pipe to the positioning ring platform.

[0019] Preferably, friction grooves are provided on the outer peripheral wall of the mounting pipe, and a plurality of friction grooves are equidistantly arranged along the circumferential direction of the mounting pipe, and the friction grooves extend along the axial direction of the mounting pipe.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The negative pressure pump is directly arranged in the handle housing, avoiding the inconvenience and limitation caused to the operator by the suction pipe and the negative pressure suction device outside the handle housing. After the loop part of the elastic cord is sleeved on the root of the tissue, the operator can directly pull the auxiliary rod to pull off the tissue. In summary, the convenience during the operation of the ligator is greatly improved;

[0022] 2. When installing the loop part of the elastic cord, the loop part of the elastic cord is sleeved from the limiting pipe and the loop part is moved towards the mounting pipe until the loop part is closely attached to the limiting ring of the limiting plug. Then, the limiting pipe is inserted into the extension pipe, and the mounting pipe is rotated until the limiting block is clamped between the inner wall of the limiting groove and the limiting protrusion to fix the mounting pipe. When using the ligator, the limiting plug can be pulled off the mounting pipe. When the elastic cord needs to be replaced, the mounting pipe can be directly taken out of the extension pipe. Compared with directly stretching the elastic cord and sleeving it on the extension pipe, the operation of moving the elastic cord to the mounting pipe through the limiting pipe is more convenient and fast and has a low operation error rate, improving the operability and operation convenience of replacing the elastic cord. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of an easy-to-operate electric negative pressure ligator in an embodiment of the present application.

[0024] Figure 2 is a schematic diagram of the structure for showing the negative pressure pump after hiding part of the handle housing in an embodiment of the present application.

[0025] Figure 3 is a schematic diagram of the sectional structure for showing the installation component in an embodiment of the present application.

[0026] Figure 4 is an exploded structure diagram for showing the cooperation between the installation component and the extension pipe in an embodiment of the present application.

[0027] Figure 5 is a schematic diagram for showing the structure of the relief groove and the limiting groove in an embodiment of the present application.

[0028] Figure 6 is a schematic diagram for showing the structure of the mounting pipe and the limiting pipe in an embodiment of the present application.

[0029] Figure 7 It is a schematic structural diagram for showing the limit plug in the embodiments of the present application.

[0030] Explanation of reference numerals: 1. Handle main body; 11. Handle housing; 2. Extension tube; 21. Relief groove; 22. Limit groove; 221. Limit protrusion; 3. Pushing tube; 31. Accommodating groove; 4. Driving assembly; 41. Wrench; 42. Connecting rod; 43. Driving rod; 5. Negative pressure pump; 51. Suction pipe; 52. Air discharge pipe; 521. Air discharge part; 522. Sealing plug; 6. Battery; 7. Elastic cord; 71. Ring part; 72. Cord part; 721. Auxiliary rod; 8. Mounting assembly; 81. Mounting tube; 811. Limit tube; 812. Friction groove; 82. Limit plug; 821. Plug head; 822. Limit ring; 823. Cross bar; 8231. Unit plate body; 824. In-place plate; 83. Positioning ring platform; 84. Transition inclined surface; 9. Limit assembly; 91. Limit block. Detailed implementation manners

[0031] The following will Figure 1-7 further describe the present application in detail with reference to the attached drawings.

[0032] The embodiments of the present application disclose an electric negative pressure ligator that is convenient to operate.

[0033] Referring to Figure 1-7 , the electric negative pressure ligator that is convenient to operate includes a handle main body 1. The front end of the handle main body 1 is fixedly connected with an extension tube 2. A pushing tube 3 is slidably arranged on the extension tube 2. The pushing tube 3 slides axially along the extension tube 2 through a driving assembly 4.

[0034] The handle main body 1 includes a handle housing 11. The driving assembly 4 includes an integrally formed wrench 41, a connecting rod 42, and a driving rod 43. The wrench 41, the connecting rod 42, and the driving rod 43 are integrally in a "Z" shape. The wrench 41 rotates outside the handle housing 11. A rotating shaft is arranged on the connecting rod 42. The rotating shaft is fixedly connected with the handle housing 11. The connecting rod 42 is rotatably connected with the rotating shaft. An accommodating groove 31 is formed on the outer wall of the pushing tube 3 near one end of the handle main body 1. The end of the driving rod 43 away from the connecting plate is located in the accommodating groove 31. A return torsion spring is arranged on the rotating shaft. One end of the return torsion spring is fixed to the connecting rod 42, and the other end of the return torsion spring is fixed to the handle housing 11. The acting force exerted by the return torsion spring on the rotating shaft makes the wrench 41 move away from the handle main body 1.

[0035] A negative pressure pump 5 and a battery 6 are arranged inside the handle housing 11. The negative pressure pump 5 and the battery 6 are electrically connected. The air inlet end of the negative pressure pump 5 is communicated with the extension tube 2 through an air suction tube 51. A vent tube 52 is arranged on the air suction tube 51. A venting member 521 is arranged on the vent tube 52. The venting member 521 is in a plate shape. One end of the venting member 521 is rotatably connected to the handle housing 11. A sealing plug 522 is arranged at the other end of the venting member 521. The sealing plug 522 is in interference fit with the opening at the end of the vent tube 52 away from the air suction tube 51. When the venting member 521 rotates, the sealing plug 522 is inserted into or disengaged from the vent tube 52. Before ligating the tissue, the sealing plug 522 is inserted into the vent tube 52, and the negative pressure pump 5 is started, so that the tissue is sucked up under the negative pressure to a state convenient for ligation. After the operation is over, the venting member 521 is rotated until the sealing plug 522 disengages from the vent tube 52 to relieve the pressure.

[0036] The direct arrangement of the negative pressure pump 5 inside the handle housing 11 avoids the inconvenience and restrictions caused by the air suction tube 51 and the negative pressure suction device outside the handle housing 11 to the operator, and improves the convenience during the operation of the ligator.

[0037] An elastic cord 7 is arranged at the front end of the extension tube 2. The elastic cord 7 includes a loop portion 71 and a wire portion 72. The loop portion 71 is arranged on the extension tube 2 through a mounting assembly 8. The wire portion 72 is connected with an auxiliary rod 721. The wire portion 72 is fixedly connected with the auxiliary rod 721. The auxiliary rod 721 is close to the push rod.

[0038] After the loop portion 71 of the elastic cord 7 is sleeved on the root of the tissue, the operator can directly pull the auxiliary rod 721 to pull down the tissue, which greatly improves the convenience during the operation of the ligator.

[0039] During the operation, the wrench 41 is pressed to rotate the wrench 41 towards the direction close to the handle body 1. The wrench 41 drives the part of the driving rod 43 located in the receiving groove 31 to rotate towards the direction close to the loop portion 71 of the elastic cord 7 through the connecting rod 42, driving the push tube 3 to slide towards the direction close to the loop portion 71 of the elastic cord 7, so as to realize that the push tube 3 pushes the loop portion 71 of the elastic cord 7 to the root of the tissue. After the wrench 41 is released, the wrench 41 moves towards the direction away from the handle body 1 under the action of the reset torsion spring, driving the part of the driving rod 43 located in the receiving groove 31 to rotate towards the direction away from the position where the loop portion 71 of the elastic cord 7 is installed, driving the push tube 3 to slide towards the direction away from the position where the loop portion 71 of the elastic cord 7 is installed, and realizing the reset.

[0040] The installation component 8 includes an installation pipe 81 and a limit plug 82. The installation pipe 81 is inserted into the push pipe 3. The installation pipe 81 is coaxially connected with a limit pipe 811. The outer diameter of the limit pipe 811 is smaller than that of the installation pipe 81. The limit pipe 811 is inserted into the extension pipe 2. A limit component 9 is arranged on the limit pipe 811. The limit pipe 811 is fixed in the extension pipe 2 through the limit component 9.

[0041] The limit plug 82 includes a plug head 821, a limit ring 822, and a cross bar 823. The limit ring 822 is coaxially connected to one end of the plug head 821 close to the extension pipe 2. The limit ring 822 is sleeved on the installation pipe 81. The loop part 71 of the elastic cord 7 is located between the limit ring 822 and the push pipe 3.

[0042] The cross bar 823 is coaxially connected to one end of the plug head 821 close to the extension pipe 2 and the cross bar 823 is inserted into the installation pipe 81. A positioning plate 824 is arranged at one end of the cross bar 823 far from the installation pipe 81. The cross bar 823 includes four integrally formed unit plate bodies 8231. The positioning plate 824 is fixedly connected to each unit plate body 8231 and the positioning plate 824 extends along the radial direction of the extension pipe 2. The positioning plate 824 abuts against one end of the installation pipe 81 far from the extension pipe 2.

[0043] The limit component 9 includes a limit block 91. The limit block 91 is fixedly connected to the outer wall of the limit pipe 811. The limit blocks 91 are symmetrically arranged on both sides in the radial direction of the limit pipe 811. A relief groove 21 for the limit block 91 to axially penetrate into the extension pipe 2 and a limit groove 22 for the limit block 91 to slide circumferentially along the extension pipe 2 are formed on the inner wall of the extension pipe 2. The relief groove 21 penetrates through one end of the extension pipe 2 far from the handle body 1. The limit groove 22 is communicated with the relief groove 21. A limit protrusion 221 is arranged on the inner wall of the limit groove 22. After the limit block 91 rotates to abut against the inner wall at one radial end of the limit groove 22, the limit block 91 is clamped between the inner wall of the limit groove 22 and the limit protrusion 221. The relief groove 21, the limit groove 22, and the limit protrusion 221 all correspond to the limit block 91 one by one.

[0044] A positioning ring platform 83 is arranged on the outer peripheral wall of the limit pipe 811. When the limit block 91 is located in the limit groove 22, one side of the positioning ring platform 83 far from the installation pipe 81 abuts against one side of the extension pipe 2 close to the installation pipe 81. A transition inclined surface 84 is arranged between the installation pipe 81 and the positioning ring platform 83. The transition inclined surface 84 is arranged in a reducing manner along the direction from the installation pipe 81 to the positioning ring platform 83, which is convenient for the loop part 71 of the elastic cord 7 to move from the limit pipe 811 to the installation pipe 81.

[0045] A friction groove 812 is provided on the outer peripheral wall of the installation pipe 81. A plurality of friction grooves 812 are equidistantly arranged along the circumferential direction of the installation pipe 81, and the friction grooves 812 extend along the axial direction of the installation pipe 81, increasing the friction force between the elastic cord 7 and the installation pipe 81. When the push pipe 3 does not apply a thrust to the ring body portion 71, the ring body portion 71 is prevented from detaching from the installation pipe 81.

[0046] When installing the elastic cord 7 on the ring body portion 71, the ring body portion 71 of the elastic cord 7 is sleeved from the limiting pipe 811 and the ring body portion 71 is moved towards the installation pipe 81 until the ring body portion 71 abuts against the limiting ring 822 of the limiting plug 82. Then, the limiting pipe 811 is inserted into the extension pipe 2, and the installation pipe 81 is rotated until the limiting block 91 is clamped between the inner wall of the limiting groove 22 and the limiting protrusion 221 to fix the installation pipe 81. When using the ligator, the limiting plug 82 can be pulled out from the installation pipe 81. When the elastic cord 7 needs to be replaced, the installation pipe 81 can be directly removed from the extension pipe 2. Compared with directly stretching the elastic cord 7 and sleeving it on the extension pipe 2, the operation of moving the elastic cord 7 onto the installation pipe 81 through the limiting pipe 811 is more convenient and fast, and the operation error rate is low, improving the operability and convenience of replacing the elastic cord 7.

[0047] The implementation principle of an easy-to-operate electric negative pressure ligator according to an embodiment of the present application is as follows:

[0048] During the operation, the sealing plug 522 is inserted into the air release pipe 52, the limiting plug 82 is removed, and then the negative pressure pump 5 is started, so that the tissue is sucked up under the negative pressure to a state convenient for ligation. The wrench 41 is pressed and rotated towards the direction close to the handle body 1. The wrench 41 drives the part of the driving rod 43 located in the receiving groove 31 to rotate towards the direction close to the ring body portion 71 of the elastic cord 7 through the connecting rod 42, driving the push pipe 3 to slide towards the direction close to the ring body portion 71 of the elastic cord 7, so as to push the ring body portion 71 of the elastic cord 7 to the root of the tissue by the push pipe 3;

[0049] After the operation is completed, the wrench 41 is released. The wrench 41 moves towards the direction away from the handle body 1 under the action of the reset torsion spring, driving the part of the driving rod 43 located in the receiving groove 31 to rotate towards the direction away from the position where the ring body portion 71 of the elastic cord 7 is installed, driving the push pipe 3 to slide towards the direction away from the position where the ring body portion 71 of the elastic cord 7 is installed to achieve reset. Then, the air release member 521 is rotated until the sealing plug 522 disengages from the air release pipe 52 for pressure relief.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electric negative pressure ligation device that is easy to operate, characterized in that: The invention comprises a handle body (1), the front end of which is fixedly connected to an extension tube (2), a push tube (3) being slidably arranged on the extension tube (2), and the push tube (3) slidingly sliding along the axial direction of the extension tube (2) through a driving assembly (4); The handle body (1) comprises a handle housing (11), a negative pressure pump (5) and a battery (6) are arranged in the handle housing (11), the negative pressure pump (5) and the battery (6) are electrically connected, an air inlet end of the negative pressure pump (5) is connected to the extension tube (2) through an air intake pipe (51), an air discharge pipe (52) is arranged on the air intake pipe (51), an air discharge member (521) is arranged on the air discharge pipe (52), the air discharge member (521) is in a plate shape, one end of the air discharge member (521) is rotatably connected to the handle housing (11), the other end of the air discharge member (521) is provided with a sealing plug (522), the sealing plug (522) is interference-fitted in an opening at one end of the air discharge pipe (52) away from the air intake pipe (51), the air discharge member (521) is rotated until the sealing plug (522) is inserted into the air discharge pipe (52) or detached from the air discharge pipe (52); The front end of the extension tube (2) is provided with an elastic cord (7), the elastic cord (7) comprising a ring body portion (71) and a wire body portion (72), the ring body portion (71) is arranged on the extension tube (2) through a mounting assembly (8), the wire body portion (72) is connected to an auxiliary rod (721), the wire body portion (72) is fixedly connected to the auxiliary rod (721), and the auxiliary rod (721) is close to the push rod.

2. The easy-to-operate electric negative pressure ligation device according to claim 1, characterized in that: The driving assembly (4) comprises an integrally formed wrench (41), a connecting rod (42) and a driving rod (43); the wrench (41), the connecting rod (42) and the driving rod (43) are in a "Z" shape as a whole; the wrench (41) is rotatably located outside the handle housing (11); a rotating shaft is provided on the connecting rod (42), the rotating shaft is fixedly connected to the handle housing (11), and the connecting rod (42) is rotatably connected to the rotating shaft; an accommodating groove (31) is provided on the outer wall of one end of the push tube (3) close to the handle body (1), and the end of the driving rod (43) away from the connecting plate is located in the accommodating groove (31); a reset torsion spring is provided on the rotating shaft, one end of the reset torsion spring is fixed to the connecting rod (42), and the other end of the reset torsion spring is fixed to the handle housing (11); the force applied by the reset torsion spring to the rotating shaft causes the wrench (41) to move in a direction away from the handle body (1).

3. The easy-to-operate electric negative pressure ligation device according to claim 1, characterized in that: The mounting assembly (8) comprises a mounting tube (81) and a stopper (82); the mounting tube (81) is inserted into the push tube (3); the mounting tube (81) is coaxially connected to a stopper tube (811); the outer diameter of the stopper tube (811) is smaller than the outer diameter of the mounting tube (81); the stopper tube (811) is inserted into the extension tube (2); a stopper assembly (9) is arranged on the stopper tube (811); and the stopper tube (811) is fixed in the extension tube (2) via the stopper assembly (9); The limiting plug (82) comprises a plug head (821), a limiting ring (822), and a cross rod (823); the limiting ring (822) is coaxially connected to one end of the plug head (821) close to the extension tube (2); the limiting ring (822) is sleeved on the mounting tube (81); and the ring body (71) of the elastic rope (7) is located between the limiting ring (822) and the push tube (3); The cross rod (823) is coaxially connected to one end of the plug (821) close to the extension tube (2) and the cross rod (823) is inserted into the mounting tube (81). An end of the cross rod (823) away from the mounting tube (81) is provided with a positioning plate (824). The cross rod (823) includes four integrally formed unit plates (8231). The positioning plate (824) is fixedly connected to each unit plate (8231), and the positioning plate (824) abuts against one end of the mounting tube (81) away from the extension tube (2).

4. The easy-to-operate electric negative pressure ligation device according to claim 3 is characterized in that: The limiting assembly (9) comprises a limiting block (91), the limiting block (91) being fixedly connected to the outer wall of the limiting tube (811), the inner wall of the extension tube (2) being provided with a clearance groove (21) for the limiting block (91) to penetrate axially along the extension tube (2), and a limiting groove (22) for the limiting block (91) to slide circumferentially along the extension tube (2), the clearance groove (21) penetrating through one end of the extension tube (2) away from the handle body (1), and the limiting groove (22) being in communication with the clearance groove (21); A limiting protrusion (221) is provided on the inner wall of the limiting groove (22), and after the limiting block (91) rotates until the limiting block (91) abuts against the inner wall of one radial end of the limiting groove (22), the limiting block (91) is clamped between the inner wall of the limiting groove (22) and the limiting protrusion (221).

5. The easy-to-operate electric negative pressure ligation device according to claim 4, characterized in that: The limiting blocks (91) are symmetrically arranged on both sides of the limiting tube (811) in the radial direction, and the clearance grooves (21), the limiting grooves (22), and the limiting protrusions (221) all correspond to the limiting blocks (91) one by one.

6. The easy-to-operate electric negative pressure ligation device according to claim 4, characterized in that: A positioning ring platform (83) is provided on the outer peripheral wall of the limiting tube (811); when the limiting block (91) is located in the limiting groove (22), a side of the positioning ring platform (83) away from the mounting tube (81) abuts against a side of the extension tube (2) close to the mounting tube (81).

7. The easy-to-operate electric negative pressure ligation device according to claim 6, characterized in that: A transition slope (84) is provided between the mounting tube (81) and the positioning ring platform (83), and the transition slope (84) is arranged to decrease in the direction from the mounting tube (81) to the positioning ring platform (83).

8. The easy-to-operate electric negative pressure ligation device according to claim 3, characterized in that: The outer peripheral wall of the mounting tube (81) is provided with a friction groove (812), a plurality of the friction grooves (812) are arranged at equal intervals along the circumference of the mounting tube (81), and the friction grooves (812) are extended along the axial direction of the mounting tube (81).

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