Continuous loop ligature device

Abstract

The utility model relates to a continuous ligation device 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 arranged outside the extension tube in a sleeved mode, the extension tube and the handle shell are relatively fixed, the outer sleeve is connected with the extension tube in a sliding mode, and a driving assembly used for driving the outer sleeve to slide is arranged in the handle shell. The extension pipe is sleeved with elastic rings, the multiple elastic rings are arranged at equal intervals in the axial direction of the extension pipe, and positioning pieces used for positioning the elastic rings are arranged on the peripheral wall of the extension pipe and abut against the sides, close to the handle shell, of the corresponding elastic rings. Push rods are arranged on the inner wall of the outer sleeve, the ends, away from the outer sleeve, of the push rods extend to the elastic rings and abut against the sides, close to the handle shell, of the elastic rings, the push rod at each elastic ring is located on the side, close to the handle shell, of the corresponding elastic ring, and the ends, away from the outer sleeve, of the push rods incline in the direction away from the handle shell. The elastic ring percussion device has the effect of continuously percussion the elastic ring to improve the treatment efficiency.

Description

Technical Field

[0001] The utility model relates to the field of ligatures, in particular to a continuous ligature. Background Art

[0002] A ligation device is a therapeutic device used to treat polyps, hemorrhoids and other diseases. When the ligation device is working, it is connected to a 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 shell, the front end of the handle shell 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. After the elastic ring tightens the tissue, the operator pulls the tissue off.

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

[0005] In order to solve the above technical problems, the present application provides a continuous ligation device.

[0006] The continuous ligation device provided in this application adopts the following technical solution:

[0007] A continuous ligation device comprises a handle housing, an extension tube and an outer sleeve are provided at the front end of the handle housing, the outer sleeve is sleeved outside the extension tube, the extension tube is relatively fixed to the handle housing, the outer sleeve is slidably connected to the extension tube, a support bar is provided on the inner wall of the outer sleeve, a side of the support bar away from the outer sleeve is in contact with the outer wall of the extension tube, and a drive assembly for driving the outer sleeve to slide is provided in the handle housing;

[0008] The extension tube is sleeved with an elastic ring, and a plurality of the elastic rings are equidistantly arranged along the axial direction of the extension tube. A positioning member for positioning the elastic ring is provided on the outer peripheral wall of the extension tube, and the positioning member abuts against a side of the corresponding elastic ring close to the handle housing;

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

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

[0011] When the outer sleeve slides toward the direction close to the handle housing, the push rod is reset;

[0012] A negative pressure suction component for sucking tissue is arranged in the handle housing.

[0013] Preferably, each elastic ring corresponds to a plurality of push rods, and the plurality of push rods at each elastic ring are equidistantly arranged along the circumference of the extension tube.

[0014] Preferably, a guide groove is provided on the outer peripheral wall of the extension tube, the guide groove extends along the axial direction of the extension tube, and the push rod slides in the guide groove.

[0015] Preferably, the drive assembly includes a drive wrench and a return spring, wherein the middle portion of the drive wrench is rotatably connected to the handle housing via a torsion spring, and the torsion spring applies a force to the drive wrench so that the end of the drive wrench located outside the handle housing moves in a direction away from the handle housing;

[0016] A first drive plate and a second drive plate are provided on the outer peripheral wall of the outer sleeve, wherein the first drive plate is closer to the elastic ring than the second drive plate, and the top end of the drive wrench is clamped between the first drive plate and the second drive plate;

[0017] A limiting ring plate is provided on the outer peripheral wall of the outer sleeve, and a reset ring plate is provided on the inner wall of the handle shell. The reset ring plate is closer to the elastic ring than the limiting ring plate. The reset spring is located between the limiting ring plate and the reset ring plate. One end of the reset spring abuts against the limiting ring plate, and the other end of the reset spring abuts against the reset ring plate.

[0018] Preferably, the positioning member is in the shape of a convex block, and the positioning member is fixedly arranged on the outer wall of the extension tube. Multiple positioning members are arranged at each elastic ring, and the multiple positioning members are arranged equidistantly along the circumference of the extension tube. The side of the positioning member away from the adjacent elastic ring is a slope, and the top end of the slope is closer to the adjacent elastic ring than the lowest end.

[0019] Preferably, the outer sleeve includes a first semi-annular tube and a second semi-annular tube, wherein a plug-in block is provided on a surface of the first semi-annular tube close to the second semi-annular tube, and a plurality of the plug-in blocks are equidistantly arranged along the axial direction of the first semi-annular tube, and a plug-in groove for plugging the plug-in block is provided on a surface of the second semi-annular tube close to the first semi-annular tube, wherein the plug-in groove corresponds to the plug-in block in a one-to-one manner;

[0020] A limiting protrusion is provided on the side of the plug-in block close to the second semi-annular tube, and the limiting protrusion is provided at a position of the plug-in block close to the central axis of the outer sleeve. A limiting groove is provided on the side of the plug-in slot away from the first semi-annular tube, and the limiting groove is clamped in the limiting groove.

[0021] Preferably, the negative pressure suction assembly includes a suction tube, an air release tube, and a connecting tube. One end of the suction tube is plugged into and communicated with the end of the extension tube extending into the handle housing. The other end of the suction tube is sealed. The suction tube is fixedly connected to the handle housing.

[0022] One end of the air release pipe is connected to and communicated with the side wall of the suction pipe, and the other end of the air release pipe is connected to an auxiliary pipe. The auxiliary pipe is opened at one end away from the driving wrench, and is sealed at one end close to the wrench. The auxiliary pipe is provided with an air release member.

[0023] One end of the connecting tube is connected to and communicates with the side wall of the air release tube, and the other end of the connecting tube extends to the outside of the handle housing and is externally connected to a negative pressure suction machine.

[0024] Preferably, the air leaking member is in the shape of a plate, and the side wall of the air leaking member is rotatably connected to the handle shell. A sealing plug is provided on one side of the air leaking member located inside the handle shell, and the end of the sealing plug away from the air leaking member is interference fit in the opening of the auxiliary tube. The air leaking member is rotated until the sealing plug is inserted into the auxiliary tube or detached from the auxiliary tube.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. During surgery, the tissue is first sucked by the negative pressure suction component, and then the drive wrench is pressed. The top of the drive wrench pushes the outer sleeve toward the elastic ring through the first drive plate. Each elastic ring moves toward the root of the tissue. The elastic ring farthest from the handle housing moves from the extension tube to the root of the tissue. The elastic ring originally located farthest from the handle housing moves toward the root of the tissue to the position farthest from the handle housing. At this time, the return spring is compressed.

[0027] After the driving wrench is released, the driving wrench is reset under the action of the torsion spring, and the reset spring pushes the limit ring plate in the direction away from the elastic ring to restore the original state, so that the outer sleeve is reset and the push rod is also reset;

[0028] When another tissue needs to be ligated again, pressing the drive wrench again can cause the next elastic ring to be fired to the root of another tissue, achieving the effect of continuous ligation treatment, thereby improving treatment efficiency;

[0029] 2. The first half ring tube and the second half ring tube can be quickly spliced ​​together by cooperating with the plug-in block and the plug-in groove, thereby improving the convenience of assembling the outer sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of a continuous ligation device in an embodiment of the present application.

[0031] Figure 2 This is a schematic diagram of the structure of the continuous ligation device after hiding the second half ring tube and one of the unit shells in the embodiment of the present application.

[0032] Figure 3 This is a schematic diagram of the structure of the continuous ligation device after the handle housing is hidden in the embodiment of the present application.

[0033] Figure 4 It is a schematic diagram of the exploded structure used to illustrate the relationship between the first semi-annular tube and the second semi-annular tube in the embodiment of the present application.

[0034] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0035] Explanation of the accompanying drawings: 1. Handle shell; 2. Extension tube; 21. Tube body; 211. Guide groove; 22. Outer expansion section; 3. Outer sleeve; 31. First semi-annular tube; 311. Plug-in block; 312. Limiting protrusion; 32. Second semi-annular tube; 321. Plug-in groove; 322. Limiting groove; 33. Support bar; 4. Drive assembly; 41. Drive wrench; 42. Return spring; 43. First drive plate; 44. Second drive plate; 45. Limiting ring plate; 46. Return ring plate; 5. Elastic ring; 6. Positioning member; 7. Push rod; 71. Observation notch; 8. Negative pressure suction assembly; 81. Suction tube; 82. Air release tube; 83. Connecting tube; 84. Auxiliary tube; 85. Air release member; 86. Sealing plug. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-5 This application is described in further detail.

[0037] The embodiment of the present application discloses a continuous ligation device.

[0038] Reference Figure 1-5 The continuous ligation device includes a handle shell 1, which includes two spliced ​​unit shells. The two unit shells are detachably connected through a conventional plug-in structure. This is not a technical solution designed to solve the technical problem of this application and will not be described here.

[0039] An extension tube 2 and an outer sleeve 3 are provided at the front end of the handle shell 1. The outer sleeve 3 is sleeved on the outside of the extension tube 2. The extension tube 2 and the handle shell 1 are relatively fixed. The outer sleeve 3 is slidably connected to the extension tube 2. A driving component 4 for driving the outer sleeve 3 to slide is provided in the handle shell 1.

[0040] The extension tube 2 is provided with a plurality of elastic rings 5, which are equidistantly arranged along the axial direction of the extension tube 2. In this embodiment, four elastic rings 5 ​​are provided. The four elastic rings 5 ​​are arranged in the direction from away from the handle housing 1 to closer to the handle housing 1, namely, the first elastic ring 5, the second elastic ring 5, the third elastic ring 5, and the fourth elastic ring 5.

[0041] A positioning piece 6 for positioning the elastic ring 5 is provided on the outer peripheral wall of the extension tube 2. The positioning piece 6 is fixedly provided on the outer wall of the extension tube 2. The positioning piece 6 abuts against the side of the corresponding elastic ring 5 close to the handle shell 1. A plurality of positioning pieces 6 are provided at each elastic ring 5. The plurality of positioning pieces 6 are equidistantly arranged along the circumference of the extension tube 2. The side of the positioning piece 6 away from the adjacent elastic ring 5 is an inclined surface. The top end of the inclined surface is closer to the adjacent elastic ring 5 than the bottom end, so as to ensure the smoothness of the movement of the elastic ring 5.

[0042] A push rod 7 is fixedly provided on the inner wall of the outer sleeve 3. The end of the push rod 7 away from the outer sleeve 3 extends to the elastic ring 5 and abuts against the side of the elastic ring 5 close to the handle shell 1. The push rod 7 at each elastic ring 5 is located on the side of the corresponding elastic ring 5 close to the handle shell 1. The end of the push rod 7 away from the outer sleeve 3 is inclined in the direction away from the handle shell 1. An observation notch 71 is provided at the push rod 7. The observation notch 71 is "U"-shaped and passes through both sides of the outer sleeve 3 in the thickness direction. The observation notch 71 not only facilitates observation of the situation on the extension tube 2, but also makes the push rod 7 and the outer sleeve 3 elastic.

[0043] When the outer sleeve 3 slides away from the handle housing 1, the push rod 7 pushes the corresponding elastic ring 5 away from the handle housing 1. The elastic ring 5 farthest from the handle housing 1 is pushed to the root of the tissue by the push rod 7. When the outer sleeve 3 slides toward the handle housing 1, the push rod 7 passes the elastic ring 5 and returns to its original position. Under the restriction of the positioning member 6, the elastic ring 5 is restrained at the elastic ring 5.

[0044] Each elastic ring 5 corresponds to a plurality of push rods 7 , and the plurality of push rods 7 at each elastic ring 5 are equidistantly arranged along the circumference of the extension tube 2 to improve the force uniformity when the push rods 7 push the elastic ring 5 .

[0045] The extension tube 2 is formed into an integral tube body 21 and an outward expansion section 22. The outward expansion section 22 is located at the end of the tube body 21 away from the handle housing 1. The outer diameter of the outward expansion section 22 is larger than the outer diameter of the tube body 21. When the elastic ring 5 is installed, the elastic ring 5 is placed on the tube body 21. Compared with the elastic ring 5 being initially placed on the outward expansion section 22, the elastic ring 5 is initially placed on the tube body 21 to avoid fatigue of the elastic ring 5 and reduce the contraction ability of the elastic ring 5.

[0046] One end of the outwardly expanded section 22 close to the tube body 21 is tapered and smoothly connected to the tube body 21 , so that the firing process of the elastic ring 5 remains smooth.

[0047] After the elastic ring 5 is fired, the elastic ring 5 moves from the tube body 21 through the expanded section 22 to the tissue root. The expanded section 22 expands the inner diameter of the elastic ring 5 to facilitate the elastic ring 5 to be tied to the tissue root.

[0048] A guide groove 211 is provided on the outer peripheral wall of the extension tube 2 . The guide groove 211 is located on the tube body 21 and extends along the axial direction of the extension tube 2 . The push rod 7 slides in the guide groove 211 . The guide groove 211 provides a limiting guide for the movement of the push rod 7 .

[0049] The driving assembly 4 includes a driving wrench 41 and a return spring 42. The middle part of the driving wrench 41 is rotatably connected to the handle housing 1 through a torsion spring. The torsion spring applies a force to the driving wrench 41 to cause the end of the driving wrench 41 located outside the handle housing 1 to move in a direction away from the handle housing 1.

[0050] The handle housing 1 is provided with a limit opening for the driving wrench 41 to rotate. The rotation connection between the driving wrench 41 and the handle housing 1 is close to the limit opening, and the limit opening is used to limit the resetting movement of the driving wrench 41.

[0051] A first drive plate 43 and a second drive plate 44 are provided on the outer circumferential wall of the outer sleeve 3. The first drive plate 43 is closer to the elastic ring 5 than the second drive plate 44. The top end of the drive wrench 41 is clamped between the first drive plate 43 and the second drive plate 44. The top portion of the drive wrench 41 is bifurcated and located on both sides of the radial direction of the outer sleeve 3.

[0052] A limiting ring plate 45 is provided on the outer peripheral wall of the outer sleeve 3, and a reset ring plate 46 is provided on the inner wall of the handle housing 1. The reset ring plate 46 is closer to the elastic ring 5 than the limiting ring plate 45. The reset spring 42 is located between the limiting ring plate 45 and the reset ring plate 46. One end of the reset spring 42 abuts against the limiting ring plate 45, and the other end of the reset spring 42 abuts against the reset ring plate 46.

[0053] Press the driving wrench 41, and the top end of the driving wrench 41 pushes the outer sleeve 3 toward the direction close to the elastic ring 5 through the first driving plate 43. Each elastic ring 5 moves toward the direction close to the tissue root. The first elastic ring 5 moves from the extension tube 2 to the tissue root, the second elastic ring 5 moves toward the direction close to the tissue root to the original position of the first elastic ring 5, the third elastic ring 5 moves toward the direction close to the tissue root to the original position of the second elastic ring 5, and the fourth elastic ring 5 moves toward the direction close to the tissue root to the original position of the third elastic ring 5. At this time, the reset spring 42 is compressed.

[0054] After the driving wrench 41 is released, the driving wrench 41 is reset under the action of the torsion spring, and the reset spring 42 pushes the limit ring plate 45 away from the elastic ring 5 to restore the original state, so that the outer sleeve 3 is reset and the push rod 7 is also reset;

[0055] When another tissue needs to be ligated again, pressing the driving wrench 41 again can cause the next elastic ring 5 to be fired to the root of another tissue, thereby achieving the effect of continuous ligation treatment and improving the treatment efficiency.

[0056] The outer sleeve 3 includes a first semi-annular tube 31 and a second semi-annular tube 32. The first semi-annular tube 31 and the second semi-annular tube 32 are provided with a plug-in block 311 on the surface of the first semi-annular tube 31 close to the second semi-annular tube 32. A plurality of plug-in blocks 311 are arranged equidistantly along the axial direction of the first semi-annular tube 31. The second semi-annular tube 32 is provided with a plug-in groove 321 for plugging in the plug-in block 311 on the surface close to the first semi-annular tube 31. The plug-in groove 321 corresponds one-to-one to the plug-in block 311.

[0057] A limiting protrusion is provided on the side of the plug-in block 311 close to the second semi-annular tube 32, and the limiting protrusion is provided at a position of the plug-in block 311 close to the central axis of the outer sleeve 3. A limiting groove 322 is provided on the side of the plug-in slot 321 away from the first semi-annular tube 31. The limiting groove 322 is clamped in the limiting groove 322 to realize the assembly of the first semi-annular tube 31 and the second semi-annular tube 32, thereby improving the convenience of assembly of the outer sleeve 3.

[0058] A negative pressure suction component 8 for sucking tissue is provided in the handle shell 1. The negative pressure suction component 8 includes a suction tube 81, an air release tube 82, and a connecting tube 83. One end of the suction tube 81 is plugged into and connected with the end of the extension tube 2 extending into the handle shell 1. The other end of the suction tube 81 is sealed. The suction tube 81 is fixedly connected to the handle shell 1, and the suction tube 81 is also fixedly connected to the extension tube 2, thereby fixing the extension tube 2 to the handle shell 1.

[0059] A support bar 33 is provided on the inner wall of the outer sleeve 3 , and a side of the support bar 33 away from the outer sleeve 3 is in contact with the outer wall of the extension tube 2 , thereby providing support for the sliding of the outer sleeve 3 .

[0060] One end of the air release pipe 82 is connected to and communicated with the side wall of the suction pipe 81, and the other end of the air release pipe 82 is connected to an auxiliary pipe 84. The auxiliary pipe 84 is set with an opening at one end away from the driving wrench 41, and is sealed at one end close to the wrench. A air release part 85 is set on the auxiliary pipe 84.

[0061] The air release member 85 is plate-shaped, and the sidewall of the air release member 85 is rotatably connected to the handle housing 1. A sealing plug 86 is provided on one side of the air release member 85 located within the handle housing 1. The end of the sealing plug 86 away from the air release member 85 is interference-fitted into the opening of the auxiliary tube 84. The air release member 85 is rotated until the sealing plug 86 is inserted into or detached from the auxiliary tube 84. After the bottom end of the air release member 85 is pressed into the handle housing 1, the air release member 85 is rotated until the sealing plug 86 is inserted into the auxiliary tube 84. After the top end of the air release member 85 is pressed into the handle housing 1, the air release member 85 is rotated until the sealing plug 86 is detached from the auxiliary tube 84.

[0062] One end of the connecting tube 83 is connected to and communicates with the side wall of the air release tube 82 , and the other end of the connecting tube 83 extends to the outside of the handle housing 1 and is externally connected to a negative pressure suction machine.

[0063] Before ligating the tissue, the sealing plug 86 is inserted into the auxiliary tube 84, and the negative pressure suction machine is started, so that the tissue is sucked up under the action of negative pressure to a state convenient for ligation. After the operation is completed, the air release piece 85 is rotated until the sealing plug 86 is separated from the auxiliary tube 84 to release the pressure.

[0064] The implementation principle of a continuous ligation device in the embodiment of the present application is as follows:

[0065] During surgery, the tissue is first sucked by the negative pressure suction component 8, and then the driving wrench 41 is pressed. The top end of the driving wrench 41 pushes the outer sleeve 3 toward the elastic ring 5 through the first driving plate 43. Each elastic ring 5 moves toward the direction close to the tissue root. The first elastic ring 5 moves from the extension tube 2 to the tissue root, the second elastic ring 5 moves toward the direction close to the tissue root to the original position of the first elastic ring 5, the third elastic ring 5 moves toward the direction close to the tissue root to the original position of the second elastic ring 5, and the fourth elastic ring 5 moves toward the direction close to the tissue root to the original position of the third elastic ring 5. At this time, the reset spring 42 is compressed;

[0066] After the driving wrench 41 is released, the driving wrench 41 is reset under the action of the torsion spring, and the reset spring 42 pushes the limit ring plate 45 away from the elastic ring 5 to restore the original state, so that the outer sleeve 3 is reset and the push rod 7 is also reset;

[0067] When another tissue needs to be ligated again, the driving wrench 41 is pressed again to cause the next elastic ring 5 to be fired to the root of another tissue.

[0068] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A continuous ligation device, characterized in that: The invention comprises a handle shell (1), wherein the front end of the handle shell (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) and the handle shell (1) are relatively fixed, the outer tube (3) and the extension tube (2) are slidably connected, a support bar (33) is provided on the inner wall of the outer tube (3), and the side of the support bar (33) away from the outer tube (3) is in contact with the outer wall of the extension tube (2), and a driving component (4) for driving the outer tube (3) to slide is provided in the handle shell (1); The extension tube (2) is sleeved with an elastic ring (5), and a plurality of the elastic rings (5) are equidistantly arranged along the axial direction of the extension tube (2). A positioning member (6) for positioning the elastic ring (5) is provided on the outer peripheral wall of the extension tube (2), and the positioning member (6) abuts against a side of the corresponding elastic ring (5) close to the handle housing (1); A push rod (7) is provided on the inner wall of the outer sleeve (3), and one end of the push rod (7) away from the outer sleeve (3) extends to the elastic ring (5) and abuts against the side of the elastic ring (5) close to the handle housing (1). The push rod (7) at each elastic ring (5) is located on the side of the corresponding elastic ring (5) close to the handle housing (1), and the end of the push rod (7) away from the outer sleeve (3) is inclined in a direction away from the handle housing (1); When the outer sleeve (3) slides in a direction away from the handle housing (1), the push rod (7) pushes the corresponding elastic ring (5) in a direction away from the handle housing (1), and the elastic ring (5) farthest from the handle housing (1) is pushed to the root of the tissue by the push rod (7); When the outer sleeve (3) slides in a direction close to the handle housing (1), the push rod (7) is reset; A negative pressure suction component (8) for sucking tissue is provided in the handle housing (1).

2. The continuous ligation device according to claim 1, characterized in that: Each elastic ring (5) corresponds to a plurality of push rods (7), and the plurality of push rods (7) at each elastic ring (5) are arranged at equal distances along the circumference of the extension tube (2).

3. The continuous ligation device according to claim 1, characterized in that: A guide groove (21) is provided on the outer peripheral wall of the extension tube (2). The guide groove (21) extends along the axial direction of the extension tube (2), and the push rod (7) slides in the guide groove (21).

4. The continuous ligation device according to claim 1, characterized in that: The driving assembly (4) comprises a driving wrench (41) and a return spring (42); the middle portion of the driving wrench (41) is rotatably connected to the handle housing (1) via a torsion spring; the torsion spring applies a force to the driving wrench (41) so as to cause an end of the driving wrench (41) located outside the handle housing (1) to move in a direction away from the handle housing (1); A first drive plate (43) and a second drive plate (44) are provided on the outer peripheral wall of the outer sleeve (3); the first drive plate (43) is closer to the elastic ring (5) than the second drive plate (44); and the top end of the drive wrench (41) is clamped between the first drive plate (43) and the second drive plate (44); A limiting ring plate (45) is provided on the outer peripheral wall of the outer sleeve (3), and a reset ring plate (46) is provided on the inner wall of the handle housing (1). The reset ring plate (46) is closer to the elastic ring (5) than the limiting ring plate (45). The reset spring (42) is located between the limiting ring plate (45) and the reset ring plate (46). One end of the reset spring (42) abuts against the limiting ring plate (45), and the other end of the reset spring (42) abuts against the reset ring plate (46).

5. The continuous ligation device according to claim 1, characterized in that: The positioning member (6) is in the shape of a convex block and is fixedly arranged on the outer wall of the extension tube (2). A plurality of positioning members (6) are arranged at each elastic ring (5). The plurality of positioning members (6) are arranged equidistantly along the circumference of the extension tube (2). The side of the positioning member (6) away from the adjacent elastic ring (5) is an inclined surface, and the top end of the inclined surface is closer to the adjacent elastic ring (5) than the bottom end.

6. The continuous ligation device according to claim 1, characterized in that: The outer sleeve (3) comprises a first semi-annular tube (31) and a second semi-annular tube (32), wherein a plug-in block (311) is provided on a surface of the first semi-annular tube (31) close to the second semi-annular tube (32), and a plurality of the plug-in blocks (311) are equidistantly arranged along the axial direction of the first semi-annular tube (31), and a plug-in groove (321) for plugging the plug-in block (311) is provided on a surface of the second semi-annular tube (32) close to the first semi-annular tube (31), and the plug-in groove (321) corresponds one-to-one to the plug-in block (311); A limiting protrusion is provided on a side of the plug-in block (311) close to the second semi-annular tube (32), and the limiting protrusion is provided at a position of the plug-in block (311) close to the central axis of the outer sleeve (3). A limiting groove (322) is provided on a side of the plug-in slot (321) away from the first semi-annular tube (31), and the limiting groove (322) is clamped in the limiting groove (322).

7. The continuous ligation device according to claim 1, characterized in that: The negative pressure suction assembly (8) comprises a suction tube (81), an air release tube (82), and a connecting tube (83); one end of the suction tube (81) is plugged into and communicated with the end of the extension tube (2) extending into the handle housing (1); the other end of the suction tube (81) is sealed, and the suction tube (81) is fixedly connected to the handle housing (1); One end of the air release pipe (82) is connected to and communicates with the side wall of the suction pipe (81), and the other end of the air release pipe (82) is communicated with an auxiliary pipe (84). The auxiliary pipe (84) is opened at one end away from the driving wrench (41), and is sealed at one end of the auxiliary pipe (84) close to the wrench. The auxiliary pipe (84) is provided with an air release member (85). One end of the connecting tube (83) is connected to and communicates with the side wall of the air release tube (82), and the other end of the connecting tube (83) extends to the outside of the handle housing (1) and is externally connected to a negative pressure suction machine.

8. The continuous ligation device according to claim 7, characterized in that: The air-deflating member (85) is plate-shaped, and the side wall of the air-deflating member (85) is rotatably connected to the handle housing (1). A sealing plug (86) is provided on one side of the air-deflating member (85) located inside the handle housing (1). An end of the sealing plug (86) away from the air-deflating member (85) is interference-fitted into the opening of the auxiliary tube (84). The air-deflating member (85) is rotated until the sealing plug (86) is inserted into the auxiliary tube (84) or detached from the auxiliary tube (84).

Images