A driving mechanism for a ligature

Abstract

The present invention relates to the technical field of ligature devices, specifically a driving mechanism for a ligature device, comprising a driver body, a wrench and a main shaft, the wrench being movably connected to the inner side of the driver body by a rotating pin; two groups of side bracket plates are provided on the inner side of the driver body, and a front bracket plate and a rear bracket plate are respectively provided on both sides of the side bracket plates; the side bracket plates are fixedly connected to the front bracket plate; a reset rod is movably connected to the inner side of the rear bracket plate, a reset spring is provided on the outer side of the reset rod, and a push plate is fixedly connected to one side of the reset rod. By setting a switching knob, the switching knob can divide the driver into two states, namely a tightening state and a cutting state. In the tightening state, the rotating head rotates, and in the cutting state, the cutter is driven to move linearly, and the cutting tool moves with the pushing plate to cut the elastic line. The above operation can be completed by the doctor pressing the wrench with one hand, which is simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of ligature devices, in particular to a driving mechanism for ligature devices. Background Art

[0002] The internal hemorrhoid band ligation device is a medical device used to treat internal hemorrhoids, mixed hemorrhoids, and polyps in the lower sigmoid colon and rectum. Its transparent suction tip and push-ring barrel with multiple observation holes can improve blindness during band ligation and enhance the reliability and accuracy of band ligation.

[0003] The main problem with existing ligation devices is that after the rubber ring is used to suck and ligate the patient's internal hemorrhoids, the elastic wire connected to the rubber ring needs to be cut off. The existing excision method is to cut the elastic wire with an external auxiliary tool. Cutting the elastic wire with an external auxiliary tool is inconvenient for the doctor to operate with one hand. Therefore, we provide a new mechanism that is convenient for cutting the elastic wire to solve the above problem. Summary of the Invention

[0004] In view of the problem in the prior art that after the patient's hemorrhoids are ligated with an elastic ring, the elastic wire needs to be removed with the help of external auxiliary tools or internal surgical scissors, and the external auxiliary tools make it inconvenient for the doctor to operate with one hand. The present invention provides a driving mechanism for a ligation device.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A driving mechanism for a ligation device comprises a driver body, a wrench and a main shaft, wherein the wrench is movably connected to the inner side of the driver body via a rotating pin;

[0007] Two sets of side bracket plates are provided inside the driver body, and a front bracket plate and a rear bracket plate are provided on both sides of the side bracket plate;

[0008] The side support plate is fixedly connected to the front support plate;

[0009] The rear bracket plate is movably connected to the inner side of the reset rod, the outer side of the reset rod is provided with a reset spring, one side of the reset rod is fixedly connected to a push plate, the front and rear sides of the push plate are respectively provided with a slider and a fixed plate;

[0010] The front outer wall of the fixed plate is fixedly mounted with a connecting pin, the outer wall of the connecting pin is fixedly sleeved with a triangular rotating plate, and the front outer wall of the triangular rotating plate is fixedly connected with a fixing pin;

[0011] The triangular rotating plate is located inside the pushing plate;

[0012] A telescopic spring is fixedly mounted on the outer wall of the bottom of the slider, and the bottom end of the telescopic spring is fixedly connected to one set of side bracket plates;

[0013] A switching knob is provided on the front side of the slider, and a connecting column is fixedly installed on the outer wall of the rear side of the switching knob;

[0014] The connecting column and the fixing pin are located inside the slider;

[0015] A connecting rod is fixedly mounted on the outer wall of the push plate away from the reset rod;

[0016] A rotating head is fixedly sleeved on the outer side of the main shaft, an inner tube is provided at the front end of the rotating head, and an outer tube is provided on the outer side of the inner tube;

[0017] The outer side of the outer tube is fixedly sleeved with a gun head, a suction nozzle is provided in the gun head, and a cutting tool is provided at the bottom of the outer tube. The cutting tool is a hollow structure with an elastic line provided therein;

[0018] A connecting block is fixedly mounted on the outer wall of the bottom of the gun head;

[0019] A connecting piece is provided between the cutting tool and the connecting rod, and the cutting tool is inserted into the connecting block. A through hole is opened on the inner side of the connecting block at a position corresponding to the elastic line. One end of the elastic line passes through the through hole and is fixedly sleeved on the outer wall of the suction nozzle, and the other end is fixedly sleeved on the outer wall of the rotating head.

[0020] Among them, a limit plate is provided on one side of the front bracket plate, and a limit rod is provided on the outer wall of one side of the front bracket plate. A limit hole is opened on the inner side of the limit plate at a position corresponding to the limit rod, and the limit rod is inserted into the limit hole.

[0021] Wherein, a movable groove is opened at a position on the inner side of the sliding block corresponding to the connecting column and the fixing pin, and the connecting column and the fixing pin are movably sleeved in the movable groove.

[0022] Wherein, a special-shaped slot is provided on the inner side of the pushing plate at a position corresponding to the triangular rotating plate.

[0023] Wherein, the top of the wrench and the fixing plate are in contact with each other.

[0024] Beneficial effects of the present invention:

[0025] The driving mechanism for a ligation device described in the present invention is equipped with a switching knob, which can divide the driver into two states, namely a tightening state and a cutting state. In the tightening state, the rotating head rotates, and in the cutting state, the cutter is driven to move linearly. The cutting tool moves with the push plate to cut the elastic line. The above operation can be completed by the doctor by pressing the wrench with one hand, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] Figure 1 This is a schematic diagram of the front structure of the driver;

[0028] Figure 2 is a schematic diagram of a first internal structure of the driver;

[0029] Figure 3 is a schematic diagram of a second internal structure of the driver;

[0030] Figure 4 for Figure 3 Schematic diagram of the explosion structure;

[0031] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at A in the middle;

[0032] Figure 6 A schematic structural diagram of a preferred embodiment of the present invention;

[0033] Figure 7 for Figure 6 A schematic diagram of the local enlarged structure at B;

[0034] Figure 8 for Figure 6 A schematic diagram of the local enlarged structure at C;

[0035] Figure 9 for Figure 3 Schematic diagram of the connection structure between the angular rotation plate, slider, telescopic spring, and switching knob;

[0036] Figure 10 It is a schematic diagram of the connection structure between the push plate, connecting rod, reset rod and triangular rotating plate.

[0037] In the figure: 1. Driver body; 2. Wrench; 3. Switch knob; 4. Limit plate; 5. Reset rod; 6. Reset spring; 7. Push plate; 8. Side bracket plate; 9. Front bracket plate; 10. Slider; 11. Telescopic spring; 12. Connecting column; 13. Connecting rod; 14. Triangular rotating plate; 15. Connecting pin; 16. Fixing pin; 17. Special-shaped slot; 18. Rear bracket plate; 19. Fixing plate; 20. Gun head; 21. Cutting tool; 22. Spindle; 23. Rotating head; 24. Elastic line; 25. Connector; 26. Inner tube; 27. Outer tube; 28. Connecting block; 29. ​​Suction nozzle. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0039] like Figure 1As shown, a driving mechanism for a ligation device of the present invention comprises a driver body 1 and a wrench 2, wherein the wrench 2 is movably connected to the inner side of the driver body 1 via a rotating pin;

[0040] Among them, reference Figure 6-8 As shown, a rotating head 23 is fixedly sleeved on the outside of the main shaft 22, an inner tube 26 is provided at the front end of the rotating head 23, and an outer tube 27 is provided on the outside of the inner tube 26; a gun head 20 is fixedly sleeved on the outside of the outer tube 27, a suction nozzle 29 is provided in the gun head 20, and a cutting tool 21 is provided at the bottom of the outer tube 27. The cutting tool 21 is a hollow structure and an elastic line 24 is provided therein; a connecting block 28 is fixedly installed on the outer wall of the bottom of the gun head 20; a connecting piece 25 is provided between the cutting tool 21 and the connecting rod 13, and the cutting tool 21 is inserted into the connecting block 28. A through hole is opened on the inner side of the connecting block 28 at a position corresponding to the elastic line 24. One end of the elastic line 24 passes through the through hole and is fixedly sleeved on the outer wall of the suction nozzle 29, and the other end is fixedly sleeved on the outer wall of the rotating head 23;

[0041] During the treatment process, the gun head 20 is inserted near the patient's anus, and the suction nozzle 29 is firmly tied to the patient's internal hemorrhoids by internal negative pressure (not shown). After the suction nozzle 29 is tied to the hemorrhoids, the connecting block 28 is slidably connected to the suction nozzle 29, and the elastic wire 24 wrapped around the outer side of the suction nozzle 29 is pushed onto the suction nozzle 29 through the connecting block 28. The elastic wire 24 is tied to the hemorrhoids. After the treatment is completed, the elastic wire 24 needs to be cut off so that the elastic wire 24 can be left at the patient's hemorrhoids to block the blood supply to the hemorrhoids until the hemorrhoids are completely necrotic.

[0042] Among them, such as Figure 2-5As shown, two groups of side bracket plates 8 are provided on the inner side of the driver body 1, and a front bracket plate 9 and a rear bracket plate 18 are provided on both sides of the side bracket plate 8; the side bracket plate 8 is fixedly connected to the front bracket plate 9; a reset rod 5 is movably connected to the inner side of the rear bracket plate 18, a reset spring 6 is provided on the outer side of the reset rod 5, a push plate 7 is fixedly connected to one side of the reset rod 5, and a slider 10 and a fixed plate 19 are provided on the front and rear sides of the push plate 7 respectively; a connecting pin 15 is fixedly installed on the outer wall of the front side of the fixing plate 19, and a triangular rotating plate 14 is fixedly sleeved on the outer wall of the connecting pin 15, and a fixing pin 16 is fixedly connected to the outer wall of the front side of the triangular rotating plate 14; the triangular rotating plate 14 is located inside the pushing plate 7; the slider 10 A telescopic spring 11 is fixedly installed on the bottom outer wall, and the bottom end of the telescopic spring 11 is fixedly connected to one set of side bracket plates 8; a switching knob 3 is provided on the front side of the slider 10, and a connecting column 12 is fixedly installed on the outer wall of the rear side of the switching knob 3; the connecting column 12 and the fixing pin 16 are located on the inner side of the slider 10; a connecting rod 13 is fixedly installed on the outer wall of the push plate 7 away from the reset rod 5; a movable groove is opened on the inner side of the slider 10 at a position corresponding to the connecting column 12 and the fixing pin 16, and the connecting column 12 and the fixing pin 16 are movably sleeved in the movable groove; a special-shaped card groove 17 is opened on the inner side of the push plate 7 at a position corresponding to the triangular rotating plate 14; the top of the wrench 2 is in contact with the two sets of side bracket plates 8;

[0043] After the elastic wire 24 is ligated on the patient's hemorrhoid area, the elastic wire 24 needs to be cut. First, the doctor rotates the switch knob 3 downward with the finger holding the ligation device. Since a connecting column 12 is fixedly connected to the inner side of the switch knob 3, and the connecting column 12 is located in the movable groove opened by the slider 10, since the connecting column 12 is in the eccentric position of the switch knob 3, when the switch knob 3 is rotated, the connecting column 12 thereon will press the slider 10 downward, and a fixing pin 16 is sleeved in the other group of movable grooves of the slider 10, and the fixing pin 16 and the triangular rotating plate 14 are fixedly connected. Similarly, the fixing pin 16 is also located in the eccentric position of the triangular rotating plate 14. When the slider 10 moves downward, it will drive the triangular rotating plate 14 to rotate around the connecting pin 15 and snap into the special-shaped slot preset by the push plate 7. 17, the triangular rotating plate 14 and the pushing plate 7 are stuck with each other. When the switching knob 3 is downward, the doctor presses the wrench 2 with the palm of his hand holding the ligature by holding the connecting column 12 on the inside. Since the wrench 2 and the fixed plate 19 are in contact with each other, when the wrench 2 rotates around the movable pin, its top end pushes the fixed plate 19 forward. Since the fixed plate 19 is connected to the triangular rotating plate 14 through the connecting pin 15, and at this time, because the triangular rotating plate 14 and the pushing plate 7 are both stuck, the pushing plate 7 and the fixed plate 19 can move synchronously. Therefore, when the fixed plate 19 moves forward, it drives the pushing plate 7 forward, and the cutting tool 21 connected to the pushing plate 7 moves to cut the elastic line 24 located in the cutting tool 21, so that the elastic line 24 is ligated on the patient's lesion.

[0044] Among them, such as Figure 3-4 As shown, a limit plate 4 is provided on one side of the front bracket plate 9, and a limit rod is provided on the outer wall of one side of the front bracket plate 9. A limit hole is provided on the inner side of the limit plate 4 at a position corresponding to the limit rod, and the limit rod is inserted into the limit hole;

[0045] When the side bracket plate 8 moves forward, the limiting rod on the front bracket plate 9 connected to one end thereof moves along the limiting hole to ensure that the moving direction of the side bracket plate 8 is correct;

[0046] Working principle:

[0047] When the gun head 20 of the ligation device is inserted into the patient's anus, the suction nozzle 29 ligates the internal hemorrhoids. The doctor then uses the rotation of the switching knob 3 to drive the connecting column 12 on the switching knob 3 to move down the slider 10 connected thereto, and the slider 10 drives the fixing pin 16 sleeved thereon to move down. Since the fixing pin 16 is fixedly connected to the triangular rotating plate 14, the triangular rotating plate 14 will be stuck in the special-shaped slot 17 of the pushing plate 7, so that the pushing plate 7 and the triangular rotating plate 14 are clamped and fixed. Then the wrench 2 presses the fixing plate 19 forward. Because the fixing plate 19 is connected to the triangular rotating plate 14 by the connecting pin 15, and the triangular rotating plate 14 cannot move because it is stuck in the pushing plate 7, when the fixing plate 19 moves, it will drive the pushing plate 7 to move together, and the pushing plate 7 drives the connected cutting tool 21 to move together, pass through the connecting block 28 to cut the elastic line 24 inserted therein, so that the elastic line 24 is ligated on the hemorrhoids.

[0048] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A driving mechanism for a ligation device, characterized in that: It comprises a driver body (1), a wrench (2) and a main shaft (22), wherein the wrench (2) is movably connected to the inner side of the driver body (1) via a rotating pin; Two sets of side bracket plates (8) are provided inside the driver body (1), and a front bracket plate (9) and a rear bracket plate (18) are provided on both sides of the side bracket plate (8); The side support plate (8) and the front support plate (9) are fixedly connected; A reset rod (5) is movably connected to the inner side of the rear support plate (18), a reset spring (6) is provided on the outer side of the reset rod (5), a push plate (7) is fixedly connected to one side of the reset rod (5), and a slider (10) and a fixed plate (19) are provided on the front and rear sides of the push plate (7), respectively; A connecting pin (15) is fixedly mounted on the front outer wall of the fixed plate (19), a triangular rotating plate (14) is fixedly sleeved on the outer outer wall of the connecting pin (15), and a fixing pin (16) is fixedly connected to the front outer wall of the triangular rotating plate (14); The triangular rotating plate (14) is located inside the pushing plate (7); A telescopic spring (11) is fixedly mounted on the outer wall of the bottom of the slider (10), and the bottom end of the telescopic spring (11) is fixedly connected to one set of side bracket plates (8); A switching knob (3) is provided on the front side of the slider (10), and a connecting column (12) is fixedly mounted on the outer wall of the rear side of the switching knob (3); The connecting column (12) and the fixing pin (16) are located inside the slider (10); A connecting rod (13) is fixedly mounted on the outer wall of the push plate (7) away from the reset rod (5); A rotating head (23) is fixedly sleeved on the outside of the main shaft (22); an inner tube (26) is provided at the front end of the rotating head (23); and an outer tube (27) is provided on the outside of the inner tube (26); The outer side of the outer tube (27) is fixedly sleeved with a gun head (20), a suction nozzle (29) is provided inside the gun head (20), and a cutting tool (21) is provided at the bottom of the outer tube (27). The cutting tool (21) is a hollow structure and an elastic line (24) is provided inside. A connecting block (28) is fixedly mounted on the outer wall of the bottom of the gun head (20); A connecting piece (25) is provided between the cutting tool (21) and the connecting rod (13). The cutting tool (21) is inserted into the connecting block (28). A through hole is provided on the inner side of the connecting block (28) at a position corresponding to the elastic line (24). One end of the elastic line (24) passes through the through hole and is fixedly sleeved on the outer wall of the suction nozzle (29), and the other end is fixedly sleeved on the outer wall of the rotating head (23).

2. A driving mechanism for a ligation device according to claim 1, characterized in that: A limiting plate (4) is provided on one side of the front bracket plate (9), and a limiting rod is provided on the outer wall of one side of the front bracket plate (9); a limiting hole is provided on the inner side of the limiting plate (4) at a position corresponding to the limiting rod, and the limiting rod is inserted into the limiting hole.

3. The driving mechanism for a ligation device according to claim 1, characterized in that: A movable groove is provided on the inner side of the slider (10) at a position corresponding to the connecting column (12) and the fixing pin (16), and the connecting column (12) and the fixing pin (16) are movably sleeved in the movable groove.

4. The driving mechanism for a ligation device according to claim 1, characterized in that: A special-shaped slot (17) is provided on the inner side of the push plate (7) at a position corresponding to the triangular rotating plate (14).

5. The driving mechanism for a ligation device according to claim 1, characterized in that: The top of the wrench (2) and the fixing plate (19) are in contact with each other.

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