Negative pressure loop ligator with improved pressure relief

Abstract

The utility model relates to a negative pressure ligation device of improving pressure relief effect, it includes handle casing, the front end fixedly connected with extension tube of handle casing, the extension tube is slidably connected with outer sleeve pipe, the front end of extension tube is equipped with a spring ring, be provided with negative pressure relief subassembly in handle casing, and negative pressure relief subassembly includes connecting pipe, pressure relief pipe, suction pipe, the one end of connecting pipe is connected with the back end of extension tube and communicates, and the vertical section of pressure relief pipe includes vertical section and horizontal section, and the vertical section of pressure relief pipe is connected with the other end of connecting pipe and communicates, and the one end of horizontal section is equipped with pressure relief hole, and the other end of horizontal section is connected with the one end of suction pipe and communicates, and the other end of suction pipe is connected negative pressure suction machine and passes out handle casing outside, the seal plug is arranged at pressure relief hole, and the seal plug is equipped with sealing ring, and the seal plug can slide to sealing ring and seal pressure relief hole, and the one end of seal plug near suction pipe is equipped with the plugging piece for plugging suction pipe. The application can improve pressure relief effect.

Description

Technical Field

[0001] This utility model relates to the field of banding devices, and in particular to a negative pressure banding device that improves the pressure relief effect. 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 fixedly connected to the front end of the handle housing, an outer tube slidably connected to the extension tube, and an elastic ring fitted at the front end of the extension tube. After the outer tube is pushed forward, the elastic ring is pushed to fit onto the root of the tissue. After the elastic ring tightens the tissue, the operator pulls the tissue off.

[0004] The negative pressure relief assembly 5 of the ligation device includes a suction tube 53, a connecting tube 51, and a pressure relief tube 52. One end of the suction tube 53 is connected to and communicates with the side wall of one end of the extension tube 2 that extends into the handle housing 1. The other end of the suction tube 53 extends out of the handle housing 1 and is connected to a negative pressure suction machine. The connecting tube 51 is connected to and communicates with the side wall of the suction tube 53. The pressure relief tube 52 is connected to and communicates with the end of the connecting tube 51 that is away from the suction tube 53. A vent 11 is provided on the handle housing 1. An operating plate 9 is provided at one location. The operating plate 9 is slidably positioned at the vent 11. A sealing plug 7 is connected to the inner side of the operating plate 9. A pressure relief hole 521 is provided at one end of the pressure relief pipe 52 near the sealing plug 7. The diameter of the pressure relief hole 521 is larger than the outer diameter of the sealing plug 7. A sealing ring 71 is provided on the sealing plug 7. The sealing ring 71 can seal the pressure relief hole 521. A compression spring 8 is provided inside the pressure relief pipe 52. The compression spring 8 applies a force to the sealing plug 7, causing the sealing plug 7 to move outward toward the handle housing 1.

[0005] When pressure relief is required, press the operating plate 9 to move the operating plate 9 with the sealing plug 7 to the right until the vent 11 and the pressure relief hole 521 are connected to the inside of the connecting pipe 51, and the external atmosphere enters the connecting pipe 51 through the vent 11 and the pressure relief hole 521 to achieve pressure relief.

[0006] Regarding the aforementioned related technologies, the inventors believe that since the ligator needs to perform continuous ligation, and the negative pressure suction machine remains on during the continuous ligation process, when the aforementioned negative pressure relief component is releasing pressure, there is still negative pressure entering the suction tube, resulting in negative pressure remaining in the extension tube. Therefore, the pressure relief effect needs to be improved. Utility Model Content

[0007] To address the aforementioned technical problems, this application provides a negative pressure bandaging device that improves the pressure relief effect.

[0008] The negative pressure bandaging device for improving pressure relief provided in this application adopts the following technical solution:

[0009] A negative pressure ligation device for improving pressure relief includes a handle housing, an extension tube fixedly connected to the front end of the handle housing, an outer tube slidably connected to the extension tube, an elastic ring fitted at the front end of the extension tube, and the elastic ring being pushed onto the tissue root by pushing the outer tube forward. A negative pressure relief component is provided inside the handle housing, the negative pressure relief component includes a connecting tube, a pressure relief tube, and a suction tube. The connecting tube is shaped like a "7", one end of the connecting tube is connected to and communicates with the rear end of the extension tube, the pressure relief tube includes a vertical section and a horizontal section, the vertical section of the pressure relief tube is connected to and communicates with the other end of the connecting tube, one end of the horizontal section has a pressure relief hole, the other end of the horizontal section is connected to and communicates with one end of the suction tube, and the other end of the suction tube extends out of the handle housing and is connected to a negative pressure suction machine.

[0010] A sealing plug is provided at the pressure relief hole. The outer diameter of the sealing plug is smaller than the diameter of the pressure relief hole. The sealing plug slides along the length of the horizontal section. A sealing ring is provided on the sealing plug. The sealing plug can slide until the sealing ring seals the pressure relief hole. The sealing plug can also slide until the sealing ring is away from the pressure relief hole and the pressure relief hole is connected to the connecting pipe.

[0011] The sealing plug is provided with a sealing element for sealing the suction tube at one end near the suction tube;

[0012] An operating plate is provided at the end of the sealing plug away from the suction tube. A vent is provided on the handle housing. The operating plate slides at the vent. The operating plate is fixedly connected to the end of the sealing plug located outside the pressure relief tube.

[0013] Preferably, the sealing element is an elastic sealing ring, and when the pressure relief hole is fully connected to the connecting pipe, the end face of the sealing ring away from the sealing plug is interference-fitted with the end face of the suction pipe near the sealing plug.

[0014] Preferably, one end of the sealing plug located inside the pressure relief pipe is coaxially connected to an installation circular plate. The diameter of the installation circular plate is larger than the diameter of the sealing plug. The outer peripheral wall of the installation circular plate fits against the inner peripheral wall of the horizontal section of the pressure relief pipe. The side of the installation circular plate away from the sealing plug has an installation groove for installing the sealing component, and the sealing component is fixed in the installation groove.

[0015] Preferably, the handle housing is provided with a limiting protrusion to prevent the operating plate from disengaging from the vent. A support plate is provided at the end of the operating plate near the sealing plug, and a support platform is provided at the vent. When the side of the operating plate away from the sealing plug abuts against the limiting protrusion, the support plate remains on the support platform. There are gaps between the top surface of the operating plate and the inner top wall of the vent, and between the bottom surface of the operating plate and the inner bottom wall of the vent, to allow air to enter.

[0016] Preferably, a compression spring is provided in the horizontal section of the vent pipe. One end of the suction pipe connected to the pressure relief pipe passes through the horizontal section of the pressure relief pipe. The compression spring is sleeved on the suction pipe. One end of the compression spring abuts against the inner wall of the horizontal section of the pressure relief pipe, and the other end of the compression spring abuts against the sealing member. The compression spring applies a force to the sealing plug, causing the sealing plug to move outward toward the handle housing.

[0017] Preferably, the handle housing is provided with a firing assembly for driving the outer sleeve to slide. The firing assembly includes a wrench, a swing shaft, and a torsion spring. The swing shaft is located at the middle of the wrench along its length and is rotatably connected to the wrench. The swing shaft is fixedly connected to the handle housing. The torsion spring is sleeved on the swing shaft. One end of the torsion spring is fixed to the swing shaft, and the other end of the torsion spring is fixed to the wrench. The force applied by the torsion spring to the wrench causes the tip of the wrench to move away from the elastic ring. The end of the outer sleeve away from the elastic ring is provided with a mating groove, and the tip of the wrench is engaged in the mating groove.

[0018] The extension tube is fixed to the handle housing via a pressure relief tube. A clearance groove is provided on the side wall of the outer tube for the connecting tube to pass through. The clearance groove passes through the end of the outer tube away from the elastic ring. A connecting plate is fixed on the outer side wall of the pressure relief tube. The connecting plate is fixed to the inner wall of the handle housing.

[0019] Preferably, a guide strip is provided on the side wall of the extension tube, the length direction of the guide strip is parallel to the axial direction of the extension tube, and multiple guide strips are provided at equal intervals along the circumference of the extension tube. A guide groove is provided on the inner wall of the outer tube for the guide strip to slide.

[0020] In summary, this application includes the following beneficial technical effects:

[0021] When pressure relief is needed, press the control panel to move it to the right with the sealing plug until the vent, pressure relief hole and the inside of the connecting pipe are connected. External air enters the connecting pipe through the vent and pressure relief hole to relieve pressure. At this time, the sealing ring and the end face of the suction pipe are interference-fitted, and the sealing plug seals the suction pipe, preventing negative pressure from entering the pressure relief pipe and the connecting pipe, thus avoiding negative pressure entering the extension pipe and making the pressure relief effect more thorough. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a negative pressure bandage device for improving pressure relief in an embodiment of this application.

[0023] Figure 2 This is a schematic diagram illustrating the internal structure of the handle housing in an embodiment of this application.

[0024] Figure 3 This is a cross-sectional structural diagram of the negative pressure relief component used in the embodiments of this application.

[0025] Figure 4 yes Figure 2 A magnified structural diagram of point A in the middle.

[0026] Figure 5 yes Figure 2 A magnified structural diagram at point B in the middle.

[0027] Figure 6 yes Figure 3 A magnified structural diagram at point C.

[0028] Figure 7 This is a schematic diagram of the negative pressure relief component of a traditional negative pressure banding device.

[0029] Explanation of reference numerals in the attached drawings: 1. Handle housing; 11. Vent port; 12. Limiting protrusion; 13. Support platform; 2. Extension tube; 21. Guide strip; 3. Outer sleeve; 31. Mating groove; 32. Relief groove; 33. Guide groove; 4. Elastic ring; 5. Negative pressure relief assembly; 51. Connecting tube; 52. Pressure relief tube; 521. Pressure relief hole; 522. Connecting plate; 53. Suction tube; 6. Firing assembly; 61. Wrench; 62. Swing shaft; 63. Torsion spring; 7. Sealing plug; 71. Sealing ring; 72. Sealing component; 73. Mounting round plate; 731. Mounting groove; 8. Compression spring; 9. Operating plate; 91. Support plate. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0031] This application discloses a negative pressure bandage device to improve the pressure relief effect.

[0032] Reference Figure 1-6 The negative pressure ligator for improving pressure relief includes a handle housing 1. An extension tube 2 is fixedly connected to the front end of the handle housing 1. An outer sleeve 3 is slidably connected to the extension tube 2. An elastic ring 4 is sleeved on the front end of the extension tube 2. When the outer sleeve 3 is pushed forward, the elastic ring 4 is pushed to be sleeved on the root of the tissue.

[0033] The handle housing 1 is equipped with a negative pressure relief component 5, which includes a connecting pipe 51, a pressure relief pipe 52, and a suction pipe 53. The connecting pipe 51 is shaped like a "7". One end of the connecting pipe 51 is connected to and communicates with the rear end of the extension pipe 2. The pressure relief pipe 52 includes a vertical section and a horizontal section. The vertical section of the pressure relief pipe 52 is connected to and communicates with the other end of the connecting pipe 51. One end of the horizontal section has a pressure relief hole 521. The other end of the horizontal section is connected to and communicates with one end of the suction pipe 53. The other end of the suction pipe 53 extends out of the handle housing 1 and is connected to the negative pressure suction machine.

[0034] The handle housing 1 is provided with a firing assembly 6 for driving the outer tube 3 to slide. The firing assembly 6 includes a wrench 61, a swing shaft 62 and a torsion spring 63. The swing shaft 62 is located at the middle of the length of the wrench 61 and is rotatably connected to the wrench 61. The swing shaft 62 is fixedly connected to the handle housing 1. The torsion spring 63 is sleeved on the swing shaft 62. One end of the torsion spring 63 is fixed to the swing shaft 62 and the other end of the torsion spring 63 is fixed to the wrench 61. The force applied by the torsion spring 63 to the wrench 61 causes the top of the wrench 61 to move away from the elastic ring 4. The end of the outer tube 3 away from the elastic ring 4 is provided with a mating groove 31, and the top of the wrench 61 is locked in the mating groove 31.

[0035] The extension tube 2 is fixed to the handle housing 1 via the pressure relief tube 52. The side wall of the outer tube 3 is provided with a relief groove 32 for the connecting tube 51 to pass through. The relief groove 32 passes through the end of the outer tube 3 away from the elastic ring 4. A connecting plate 522 is fixed on the outer side wall of the pressure relief tube 52. The connecting plate 522 is fixed to the inner wall of the handle housing 1. Since the pressure relief tube 52 is fixed to the connecting tube 51, and the connecting tube 51 is fixed to the extension tube 2, the extension tube 2 is thus fixed to the handle housing 1.

[0036] When the elastic coil 4 needs to be fired, press the bottom end of the wrench 61 to the right. The top end of the wrench 61 moves to the left. The wrench 61 abuts against the inner wall of the mating groove 31 and pushes the outer tube 3 to the left. The outer tube 3 pushes the elastic coil 4 at the front end of the extension tube 2 to the root of the tissue. After releasing the wrench 61, the wrench 61 automatically returns to its original position under the action of the torsion spring 63. The top end of the wrench 61 drives the outer tube 3 to return to its original position to the right.

[0037] A guide bar 21 is provided on the side wall of the extension tube 2. The length direction of the guide bar 21 is parallel to the axial direction of the extension tube 2. Multiple guide bars are provided at equal intervals along the circumference of the extension tube 2. A guide groove 33 is provided on the inner wall of the outer tube 3 to allow the guide bar 21 to slide, thereby improving the stability of the sliding of the outer tube 3.

[0038] A sealing plug 7 is provided at the pressure relief hole 521. The outer diameter of the sealing plug 7 is smaller than the diameter of the pressure relief hole 521. The sealing plug 7 slides along the length of the horizontal section. A sealing ring 71 is provided on the sealing plug 7. The sealing plug 7 can slide until the sealing ring 71 seals the pressure relief hole 521. The sealing plug 7 can also slide until the sealing ring 71 is away from the pressure relief hole 521 and the pressure relief hole 521 is connected to the connecting pipe 51.

[0039] A compression spring 8 is installed in the horizontal section of the vent pipe. One end of the suction pipe 53, which is connected to the pressure relief pipe 52, is inserted into the horizontal section of the pressure relief pipe 52. The compression spring 8 is sleeved on the suction pipe 53. One end of the compression spring 8 abuts against the inner wall of the horizontal section of the pressure relief pipe 52, and the other end of the compression spring 8 abuts against the sealing member 72. The compression spring 8 applies a force to the sealing plug 7, causing the sealing plug 7 to move outward toward the handle housing 1. When the operating plate 9 is not pressed to the right, the force of the compression spring 8 keeps the sealing ring 71 sealing the pressure relief hole 521, ensuring the negative pressure effect in the extension pipe 2.

[0040] The sealing plug 7 is provided with a sealing element 72 for sealing the suction tube 53 at one end. The sealing element 72 is an elastic sealing ring. When the pressure relief hole 521 is fully connected to the connecting pipe 51, the end face of the sealing ring away from the sealing plug 7 is interference-fitted with the end face of the suction tube 53 near the sealing plug 7.

[0041] When pressure relief is needed, press the operating plate 9 to move the operating plate 9, along with the sealing plug 7, to the right until the vent 11, the pressure relief hole 521, and the connecting pipe 51 are connected. External air enters the connecting pipe 51 through the vent 11 and the pressure relief hole 521 to relieve pressure. At this time, the sealing ring and the end face of the suction pipe 53 are press-fitted, and the sealing plug 7 seals the suction pipe 53. Negative pressure cannot enter the pressure relief pipe 52 and the connecting pipe 51, thus preventing negative pressure from entering the extension pipe 2 and making the pressure relief effect more thorough.

[0042] The sealing plug 7 is located inside the pressure relief pipe 52 and is coaxially connected to an installation circular plate 73. The diameter of the installation circular plate 73 is larger than the diameter of the sealing plug 7. The outer peripheral wall of the installation circular plate 73 fits against the inner peripheral wall of the horizontal section of the pressure relief pipe 52. The side of the installation circular plate 73 away from the sealing plug 7 has an installation groove 731 for installing the sealing component 72. The sealing component 72 is fixed in the installation groove 731.

[0043] An operating plate 9 is provided at the end of the sealing plug 7 away from the suction pipe 53. A vent 11 is provided on the handle housing 1. The operating plate 9 slides at the vent 11. The operating plate 9 is fixedly connected to the end of the sealing plug 7 located outside the pressure relief pipe 52.

[0044] The handle housing 1 is provided with a limiting protrusion 12 to prevent the operating plate 9 from disengaging from the vent 11. A support plate 91 is provided at the end of the operating plate 9 near the sealing plug 7. A support platform 13 is provided at the vent 11. When the side of the operating plate 9 away from the sealing plug 7 abuts against the limiting protrusion 12, the support plate 91 remains on the support platform 13. There are gaps between the top surface of the operating plate 9 and the inner top wall of the vent 11, and between the bottom surface of the operating plate 9 and the inner bottom wall of the vent 11, to allow air to enter.

[0045] The implementation principle of the negative pressure bandage device for improving pressure relief in this application embodiment is as follows:

[0046] When performing the ligation operation, align the opening of the extension tube 2 with the tissue, then press the bottom end of the wrench 61 to the right, and the top end of the wrench 61 moves to the left. The wrench 61 abuts against the inner wall of the mating groove 31 and pushes the outer tube 3 to the left. The outer tube 3 pushes the elastic ring 4 at the front end of the extension tube 2 to the root of the tissue.

[0047] When pressure relief is needed, press the operating plate 9 to the right, so that the operating plate 9 moves to the right with the sealing plug 7 until the vent 11 and the pressure relief hole 521 are connected to the inside of the connecting pipe 51, and the external atmosphere enters the connecting pipe 51 through the vent 11 and the pressure relief hole 521 to achieve pressure relief.

[0048] 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 negative pressure ligator for improving pressure relief, comprising a handle housing (1), an extension tube (2) fixedly connected to the front end of the handle housing (1), an outer sleeve (3) slidably connected to the extension tube (2), an elastic ring (4) sleeved on the front end of the extension tube (2), and the elastic ring (4) being pushed onto the tissue root by the outer sleeve (3) being pushed forward, characterized in that: The handle housing (1) is provided with a negative pressure relief assembly (5). The negative pressure relief assembly (5) includes a connecting pipe (51), a pressure relief pipe (52), and a suction pipe (53). The connecting pipe (51) is shaped like a "7". One end of the connecting pipe (51) is connected to and communicates with the rear end of the extension pipe (2). The pressure relief pipe (52) includes a vertical section and a horizontal section. The vertical section of the pressure relief pipe (52) is connected to and communicates with the other end of the connecting pipe (51). One end of the horizontal section is provided with a pressure relief hole (521). The other end of the horizontal section is connected to and communicates with one end of the suction pipe (53). The other end of the suction pipe (53) extends out of the handle housing (1) and is connected to a negative pressure suction machine. A sealing plug (7) is provided at the pressure relief hole (521). The outer diameter of the sealing plug (7) is smaller than the diameter of the pressure relief hole (521). The sealing plug (7) slides along the length of the horizontal section. A sealing ring (71) is provided on the sealing plug (7). The sealing plug (7) can slide until the sealing ring (71) seals the pressure relief hole (521). The sealing plug (7) can also slide until the sealing ring (71) is away from the pressure relief hole (521) and the pressure relief hole (521) is connected to the connecting pipe (51). The sealing plug (7) is provided with a sealing element (72) for sealing the suction tube (53) at one end near the suction tube (53); An operating plate (9) is provided at the end of the sealing plug (7) away from the suction tube (53). A vent (11) is provided on the handle housing (1). The operating plate (9) slides at the vent (11). The operating plate (9) is fixedly connected to the end of the sealing plug (7) located outside the pressure relief tube (52).

2. The negative pressure bandage device for improving pressure relief effect according to claim 1, characterized in that: The sealing element (72) is an elastic sealing ring. When the pressure relief hole (521) is fully connected to the connecting pipe (51), the end face of the sealing ring away from the sealing plug (7) is interference-fitted with the end face of the suction pipe (53) close to the sealing plug (7).

3. The negative pressure bandage device for improving pressure relief effect according to claim 1, characterized in that: The sealing plug (7) is coaxially connected to an installation disc (73) at one end inside the pressure relief pipe (52). The diameter of the installation disc (73) is larger than the diameter of the sealing plug (7). The outer peripheral wall of the installation disc (73) fits against the inner peripheral wall of the horizontal section of the pressure relief pipe (52). The side of the installation disc (73) away from the sealing plug (7) has an installation groove (731) for installing the sealing component (72). The sealing component (72) is fixed in the installation groove (731).

4. The negative pressure bandage device for improving pressure relief effect according to claim 1, characterized in that: The handle housing (1) is provided with a limiting protrusion (12) to prevent the operating plate (9) from disengaging from the vent (11). The end of the operating plate (9) near the sealing plug (7) is provided with a support plate (91). The vent (11) is provided with a support platform. When the side of the operating plate (9) away from the sealing plug (7) abuts against the limiting protrusion (12), the support plate (91) remains on the support platform. There are gaps between the top surface of the operating plate (9) and the inner top wall of the vent (11), and between the bottom surface of the operating plate (9) and the inner bottom wall of the vent (11) for atmospheric entry.

5. The negative pressure bandage device for improving pressure relief effect according to claim 1, characterized in that: A compression spring (8) is provided in the horizontal section of the pressure relief pipe (52). One end of the suction pipe (53) connected to the pressure relief pipe (52) is inserted into the horizontal section of the pressure relief pipe (52). The compression spring (8) is sleeved on the suction pipe (53). One end of the compression spring (8) abuts against the inner wall of the horizontal section of the pressure relief pipe (52). The other end of the compression spring (8) abuts against the sealing member (72). The compression spring (8) applies a force to the sealing plug (7) to make the sealing plug (7) move toward the handle housing (1).

6. The negative pressure bandage device for improving pressure relief effect according to claim 1, characterized in that: The handle housing (1) is provided with a firing assembly (6) for driving the outer tube (3) to slide. The firing assembly (6) includes a wrench (61), a swing shaft (62) and a torsion spring (63). The swing shaft (62) is located in the middle of the length direction of the wrench (61) and is rotatably connected to the wrench (61). The swing shaft (62) is fixedly connected to the handle housing (1). The torsion spring (63) is sleeved on the swing shaft (62). One end of the torsion spring (63) is fixed to the swing shaft (62), and the other end of the torsion spring (63) is fixed to the wrench (61). The force applied by the torsion spring (63) to the wrench (61) causes the top of the wrench (61) to move away from the elastic ring (4). The outer tube (3) is provided with a mating groove (31) at the end away from the elastic ring (4). The top of the wrench (61) is locked in the mating groove (31). The extension tube (2) is fixed to the handle housing (1) via the pressure relief tube (52). The side wall of the outer tube (3) is provided with a relief groove (32) for the connecting tube (51) to pass through. The relief groove (32) passes through the end of the outer tube (3) away from the elastic ring (4). A connecting plate (522) is fixed on the outer side wall of the pressure relief tube (52). The connecting plate (522) is fixed to the inner wall of the handle housing (1).

7. The negative pressure bandage device for improving pressure relief effect according to claim 6, characterized in that: The extension tube (2) is provided with a guide strip (21) on its side wall. The length direction of the guide strip (21) is parallel to the axial direction of the extension tube (2). Multiple guide strips (21) are provided at equal intervals along the circumference of the extension tube (2). The inner wall of the outer tube (3) is provided with a guide groove (33) for the guide strip (21) to slide.

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