Ligation device gun body capable of automatically tightening and triggering elastic thread and ligation device

Abstract

The invention relates to a ligation device gun body capable of automatically tightening and percussion an elastic thread, which is connected with a gun barrel and comprises a gun shell, an elastic thread, an elastic thread, an elastic thread and an elastic thread, the percussion switch is rotationally arranged on the gun shell, and a percussion connecting piece is rotationally arranged on the percussion switch; the percussion block is arranged above the percussion connecting piece and is in contact with a sleeve in the gun barrel; one end of the percussion block is connected with the pressure spring through the pushing piece, and the percussion block abuts against the percussion connecting piece; the negative pressure pipe is arranged on the inner side of the pressure spring and is connected with the sleeve through a connecting pipe; the pull-back key is arranged on the sliding groove in a sliding mode, one end of the pull-back key is connected with a pull wire plate in the gun barrel and used for stretching and tightening the elastic thread, and the other end of the pull-back key is connected with the tension spring. The pull-back key is used for controlling the pull line plate to move backwards to achieve automatic tightening of the elastic line, meanwhile, the percussion switch is used for controlling the push pipe of the gun body to move horizontally, then the action that the elastic line annularly sleeves haemorrhoids is achieved, operation is easy, and the consistency of the loop ligature tightening degree can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a ligature gun body and a ligature capable of automatically tightening and firing an elastic line. Background Art

[0002] The principle of the ligation surgery for hemorrhoids is to suck the hemorrhoidal lesions through negative pressure, and then use a rubber ring or elastic line to tie the base of the hemorrhoid or the mucosa on the hemorrhoid. The blood supply of the hemorrhoid is blocked or the venous backflow is reduced by tightening the rubber ring or elastic line, reducing the congestion and hypertrophy of the hemorrhoid or blood stasis, causing ischemia, atrophy, and necrosis. The ligated tissue gradually falls off, the wound tissue is repaired and healed, and the detached tissue is finally discharged from the body. This method is the most effective non-surgical treatment method, which is simple, safe, effective, has few complications, and has satisfactory long-term efficacy. According to market research, there are two main types of ligation devices on the market, one is a ligation device using a rubber ring, and the other is a ligation device using an elastic line.

[0003] The biggest problem with the rubber rings currently used is whether the continuous effect of the rubber ring's retraction force can be maintained during its contraction process. If the rubber ring cannot maintain the retraction force, the rubber ring will not achieve a complete tightening and chronic cutting effect, which will cause the rubber ring to fall off and incomplete treatment. It may also cause more serious complications, such as bleeding caused by premature falling of the rubber ring. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a ligature gun body and a ligature gun that can automatically tighten and fire the elastic line. The elastic line is automatically tightened by controlling the backward movement of the pull plate through a pull-back key. At the same time, the horizontal movement of the sleeve of the gun body is controlled by the firing switch, thereby realizing the action of the elastic line encircling the hemorrhoids. The operation is simple and the consistency of the ligature tightening degree can be achieved.

[0005] In the first aspect, in order to solve the above technical problems, the present invention provides a ligature gun body capable of automatically tightening and firing an elastic line, connected to a gun barrel, comprising: A gun housing, wherein the gun housing is provided with a slide groove; A firing switch is rotatably arranged on the gun housing, and a firing connecting piece is rotatably arranged on the firing switch; A firing block is arranged above the firing connection piece and contacts the push tube in the gun barrel; one end of the firing block is connected to a compression spring through a push piece, and the firing block abuts against the firing connection piece. When the firing switch is toggled, the firing block is disengaged from the firing connection piece, and the compression spring pushes the firing block to move horizontally to realize horizontal movement of the push tube in the gun barrel; A negative pressure pipe is arranged on the inner side of the compression spring and connected to the push pipe through a connecting pipe. Gas is passed into the negative pressure pipe to achieve internal and external air pressure balance, so as to facilitate the disassembly of the gun barrel. A pull-back key is slidably arranged on the slide groove, one end of the pull-back key is connected to the wire drawing plate inside the gun barrel for stretching and tightening the elastic wire, and the other end of the pull-back key is connected to the tension spring.

[0006] In one embodiment of the present invention, a first flange structure is provided on the firing connection piece, and a first groove structure is provided on the firing block. When the firing connection piece is rotated to a certain angle, the first flange structure is disengaged from the first groove.

[0007] In one embodiment of the present invention, a limit block is further included, and the limit block is rotatably disposed on the negative pressure tube to limit the pull-back key.

[0008] In one embodiment of the present invention, a second flange structure is provided on the limit block, and a second groove structure adapted to the second flange structure is provided on the pull-back key.

[0009] In one embodiment of the present invention, when the tension spring is stretched to the maximum state, the second flange structure of the limit block is engaged in the second groove structure, and at this time, the position of the pull-back key is fixed; When the firing block moves horizontally under the action of the compression spring, the limit block rotates, so that the second flange structure is disengaged from the second groove structure, and the pull-back key moves horizontally under the tension of the tension spring.

[0010] In one embodiment of the present invention, both the firing connection piece and the limiting block are provided with a retaining spring.

[0011] In one embodiment of the present invention, the retraction key is also provided with a through hole, a buckle and a push button; the through hole is used to fix the tension spring, the buckle is connected to the pull wire plate in the barrel, and the push button is arranged on both sides of the buckle.

[0012] In one embodiment of the present invention, the pushing member includes a pushing block and a connecting push plate, the pushing block is arranged on the outside of the compression spring, one end of the connecting push plate is connected to the pushing block, and the other end is connected to the firing block.

[0013] In one embodiment of the present invention, a negative pressure air pipe is further included, which is arranged at the tail of the gun housing, and is connected to the negative pressure tube through a hose. A negative pressure switch is arranged on the negative pressure air pipe to control the on and off of the gas in the negative pressure air pipe.

[0014] In a second aspect, in order to solve the above technical problem, the present invention provides a ligature gun, comprising a gun barrel and a ligature gun body capable of automatically tightening an elastic line as described in the first aspect, wherein the gun barrel is connected to the gun housing via a gun barrel connector.

[0015] The above technical solution of the present invention has the following beneficial effects compared with the prior art: The ligation gun body and ligation device capable of automatically tightening and firing the elastic wire described in the present invention realize automatic tightening of the elastic wire by controlling the backward movement of the wire drawing plate through a pull-back key, and realizes the firing of the elastic wire by controlling the horizontal movement of the push tube of the gun body through a firing switch, thereby making it possible to ligate hemorrhoids with the elastic wire, and the operation is simple, and the consistency of the ligation tightening degree can be achieved; when the elastic wire is tightened in place, the barrel of the ligation device can automatically complete the operation of cutting off the elastic wire, and the operation is simple, which effectively shortens the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of a gun body of a ligation device capable of automatically tightening and firing an elastic line in a preferred embodiment 1 of the present invention; Figure 2 yes Figure 1 A schematic diagram of the internal structure of a ligation gun body that can automatically tighten and fire the elastic line; Figure 3 It is a structural schematic diagram of the pull-back key in the present invention; Figure 4 It is a schematic diagram of the structure of the compression spring, the pushing member, the firing block and the limiting block in the present invention; Figure 5 yes Figure 4 A schematic diagram of the structure of the limit block in FIG. Figure 6 It is a schematic diagram of the structure of the firing switch and the firing connecting piece in the present invention; Figure 7 is a schematic structural diagram of the ligation device in the second embodiment of the present invention; Figure 8 is a cross-sectional view of the ligation device in the second embodiment of the present invention; Fig. 9 It is a schematic diagram of the connection between the negative pressure tube and the sleeve in the present invention; Explanation of the markings in the specification: 1. gun case; 4. elastic line; 8. firing switch; 9. gun barrel; 10. sleeve; 11. knife rod; 12. pull-back key; 13. firing block; 14. tension spring; 15. limit block; 15a, second flange structure; 16. firing connecting piece; 17. pull wire plate; 18. compression spring; 20. push tube; 21. negative pressure air pipe; 22. negative pressure switch; 100. negative pressure tube; 101. connecting tube; 121. through hole; 122. buckle; 123. second groove structure; 124. push button; 131. first groove structure; 161. first flange structure; 200. slide groove; 300. retaining spring; 30. pushing piece; 301. pushing block; 302. connecting push plate. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0019] Reference Figure 1-7 As shown, the present invention provides a ligation gun body capable of automatically tightening and firing an elastic line, connected to a gun barrel 9, comprising: A gun housing 1, wherein a slide groove 200 is provided on the gun housing 1; A firing switch 8 is rotatably arranged on the gun housing 1, and a firing connecting piece 16 is rotatably arranged on the firing switch 8; The firing block 13 is arranged above the firing connection member 16 and contacts the sleeve 20 in the gun barrel 9; one end of the firing block 13 is connected to the compression spring 18 through the push member 30, and the firing block 13 abuts against the firing connection member 16. When the firing switch 8 is turned, the firing block 13 is out of contact with the firing connection member 16, and the compression spring 18 pushes the firing block 13 to move horizontally to realize the horizontal movement of the push tube 20 in the gun barrel 9; The negative pressure tube 100 is arranged on the inner side of the compression spring 18 and connected to the push tube 20 through the connecting tube 101. The negative pressure tube 100 passes gas to achieve internal and external pressure balance, so as to facilitate the disassembly of the gun barrel 9. The pull-back key 12 is slidably arranged on the slide groove 200 , one end of the pull-back key 12 is connected to the wire drawing plate 17 inside the gun barrel 9 for stretching and tightening the elastic wire 4 , and the other end of the pull-back key 12 is connected to the tension spring 14 .

[0020] Furthermore, the firing connection member 16 is provided with a first flange structure 161 , and the firing block 13 is provided with a first groove structure 131 . When the firing connection member 16 rotates to a certain angle, the first flange structure 161 is disengaged from the first groove structure 131 .

[0021] Furthermore, it also includes a limit block 15 , which is rotatably disposed on the negative pressure tube 100 and is used to limit the pull-back button 12 .

[0022] In this embodiment, the limiting block 15 is provided with a second flange structure 15 a , and the pull-back key 12 is provided with a second groove structure 123 adapted to the second flange structure 15 a .

[0023] In this embodiment, when the tension spring 14 is stretched to the maximum state, the second flange structure 15a of the limit block 15 is engaged in the second groove structure 123, and at this time, the position of the pull-back key 12 is fixed; When the firing block 13 moves horizontally under the action of the compression spring 18 , the limit block 15 rotates so that the second flange structure 15 a is disengaged from the second groove structure 123 , and the pull-back key 12 moves horizontally under the tension of the tension spring 14 .

[0024] In this embodiment, both the firing connecting piece 16 and the limiting block 15 are provided with a retaining spring 300 .

[0025] Furthermore, the retraction key 12 is also provided with a through hole 121 , a buckle 122 and a push button 124 ; the through hole 121 is used to fix the tension spring 14 , the buckle 122 is connected to the pull wire plate 17 in the barrel 9 , and the push button 124 is arranged on both sides of the buckle 122 .

[0026] Preferably, the pushing member 30 includes a pushing block 301 and a connecting push plate 302 , the pushing block 301 is arranged on the outside of the compression spring 18 , one end of the connecting push plate 302 is connected to the pushing block 301 , and the other end is connected to the firing block 13 .

[0027] Furthermore, it also includes a negative pressure air pipe 21, which is arranged at the rear of the gun housing 1, and is connected to the negative pressure pipe 100 through a hose. A negative pressure switch 22 is arranged on the negative pressure air pipe 21 to control the on and off of the gas in the negative pressure air pipe 21.

[0028] In this embodiment, the tension for automatically tightening the elastic line is mainly provided by a tension spring 14. The tension spring 14 provides tension to drive the pull-back button 12 to contract. One end of the pull-back button 12 is connected to a pull plate 17. The pull plate 17 is fixed to one end of the elastic line 4 through a pull rod, so the tension spring 14 eventually drives the elastic line 4 to be in a stretched state. Under the action of the tension, the ring at the front end of the elastic line 4 contracts rapidly to complete the automatic ligation action of the elastic line; when the firing action of the instrument is required, the firing switch 8 is pressed, and the firing switch 8 rotates around the mounting axis while driving the firing connection 16 to rotate. After rotating to a certain angle, the first flange structure 161 of the firing connection 16 is disengaged from the first groove structure 131 of the firing block 13. Example

[0029] like Figure 8 and 9 As shown, the present invention provides a ligature gun, comprising a gun barrel 9 and a ligature gun body capable of automatically tightening an elastic line as described in the first embodiment, wherein the gun barrel 9 is connected to a gun housing 1 via a gun barrel connector 9 .

[0030] The present invention can realize automatic ligation and automatic cutting of the elastic line 4 after the instrument is fired with one button. The elastic line 4 is knotted and sleeved on the end of the sleeve 10. The free end of the elastic line 4 is connected to the pull plate 17 through a pull rod. The pull plate 17 is controlled to move backward by a pull key to realize automatic tightening of the elastic line. When the firing switch 8 is pressed, the elastic line 4 is detached from the end of the sleeve 10 to complete the ligation action. At the same time, the knife pull rod 11 in the barrel 9 is actuated to cause the cutting knife to cut off the elastic line 4. Moreover, the wire breaking action is automatically completed after the wire is tightened, and no extra operation is required. It has the advantage of simple operation, and can achieve consistency in the tightening degree of the ligation and consistency in the wire breaking position.

[0031] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A ligator gun body capable of automatically tightening and firing an elastic line, connected to a gun barrel, characterized in that: include: A gun housing, wherein the gun housing is provided with a slide groove; A firing switch is rotatably arranged on the gun housing, and a firing connecting piece is rotatably arranged on the firing switch; A firing block is arranged above the firing connection piece and contacts the sleeve in the gun barrel; one end of the firing block is connected to a compression spring through a push piece, and the firing block abuts against the firing connection piece. When the firing switch is toggled, the firing block is disengaged from the firing connection piece, and the compression spring pushes the firing block to move horizontally to realize horizontal movement of the push tube in the gun barrel; A negative pressure pipe is arranged on the inner side of the compression spring and connected to the push pipe through a connecting pipe. Gas is passed into the negative pressure pipe to achieve internal and external air pressure balance, so as to facilitate the disassembly of the gun barrel. A pull-back key is slidably arranged on the slide groove, one end of the pull-back key is connected to the wire drawing plate inside the gun barrel for stretching and tightening the elastic wire, and the other end of the pull-back key is connected to the tension spring.

2. The ligation gun body capable of automatically tightening and firing the elastic line according to claim 1, characterized in that: The firing connection piece is provided with a first flange structure, and the firing block is provided with a first groove structure. When the firing connection piece is rotated to a certain angle, the first flange structure is disengaged from the first groove.

3. The ligation gun body capable of automatically tightening and firing the elastic line according to claim 1, characterized in that: It also includes a limit block, which is rotatably arranged on the negative pressure tube and is used to limit the pull-back key.

4. The ligation gun body capable of automatically tightening and firing the elastic line according to claim 3, characterized in that: The limiting block is provided with a second flange structure, and the pull-back key is provided with a second groove structure adapted to the second flange structure.

5. The ligation gun body capable of automatically tightening and firing the elastic line according to claim 4 or claim 1, characterized in that: When the tension spring is stretched to its maximum state, the second flange structure of the limit block is engaged in the second groove structure, and at this time, the position of the pull-back key is fixed; when the firing block moves horizontally under the action of the compression spring, the limit block rotates, so that the second flange structure disengages from the second groove structure, and the pull-back key moves horizontally under the action of the tension of the tension spring.

6. The ligation gun body capable of automatically tightening and firing the elastic line according to claim 4, characterized in that: The firing connecting piece and the limiting block are both provided with a retaining spring.

7. The ligation gun body capable of automatically tightening and firing the elastic line according to claim 5, characterized in that: The retraction key is also provided with a through hole, a buckle and a push button; the through hole is used to fix the tension spring, the buckle is connected to the pull wire plate in the barrel, and the push button is arranged on both sides of the buckle.

8. The ligation gun body capable of automatically tightening and firing the elastic line according to claim 1, characterized in that: The pushing member includes a pushing block and a connecting pushing plate. The pushing block is arranged on the outside of the compression spring. One end of the connecting pushing plate is connected to the pushing block, and the other end is connected to the firing block.

9. The ligation gun body capable of automatically tightening and firing the elastic line according to claim 1, characterized in that: It also includes a negative pressure air pipe, which is arranged at the tail of the gun housing, and is connected to the negative pressure tube through a hose. A negative pressure switch is arranged on the negative pressure air pipe to control the on and off of the gas in the negative pressure air pipe.

10. A ligation device, characterized in that: The invention comprises a gun barrel and a gun body of a ligation device capable of automatically tightening an elastic line as claimed in any one of claims 1 to 9, wherein the gun barrel is connected to a gun casing via a gun barrel connector.

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