Electric elastic wire ligation device and use method thereof

Abstract

The present invention discloses an electric elastic wire ligation device and a method of using the same, relating to the technical field of surgical instruments. The device comprises: a gun body; a negative pressure suction assembly disposed within the gun body and comprising a firing head for suctioning and fixing target tissue; an elastic wire, one end of which forms a loop with adjustable aperture, and the loop is sleeved on the firing head; a push rod assembly slidably disposed within the gun body and configured to push the loop out of the firing head; a ligation pipeline assembly disposed within the gun body and configured to hold the loop's slipknot against the loop; a winding assembly disposed within the gun body and configured to tighten the loop in cooperation with the ligation pipeline assembly; and a wire cutting tube assembly disposed within the inner cavity of the ligation pipeline assembly and configured to cut the elastic wire after the loop is tightened. The present invention, by providing a trigger switch and a linear push assembly, achieves one-button control of the sequential operation of the negative pressure suction assembly, the push rod assembly, the ligation pipeline assembly, the winding assembly, and the wire cutting tube assembly, significantly simplifying the complex operation process of a traditional ligation device.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, and in particular to an electric elastic wire ligation device and a use method thereof. Background Art

[0002] Band ligation with rubber bands or elastic cords is a common clinical treatment for anorectal conditions (such as hemorrhoids, anal prolapse, rectal prolapse, and rectocele). It offers minimal trauma, rapid recovery, proven efficacy, and few complications. However, traditional band ligation, primarily performed manually using a simple band ligation device, is not only cumbersome and complex, but also difficult to standardize due to individual physicians' varying techniques and / or proficiency, significantly impacting efficacy. Improper operation can also lead to serious complications. Summary of the Invention

[0003] The purpose of the present invention is to provide an electric elastic wire ligation device and a method for using the same, which solves the problems of traditional ligation devices such as "complicated operation, high technical requirements for the surgeon, difficulty in standardizing and normalizing the operation, and easy impact on efficacy and complications".

[0004] The present invention solves the above-mentioned technical problems through the following technical solutions, which include:

[0005] gun body;

[0006] A negative pressure suction component is provided inside the gun body and is used to attract and fix the target tissue. The negative pressure suction component has a transmitting head located at the head of the gun body;

[0007] An elastic wire, one end of which forms a ring with adjustable aperture, and the ring is sleeved on the launch head;

[0008] A push rod assembly is slidably mounted on the gun body and is used to push the ring out of the firing head;

[0009] The ligature line assembly is arranged on the gun body and parallel to the push rod assembly, and is used to press the slip knot of the ring;

[0010] The winding assembly is provided on the gun body. The other end of the elastic line is connected to the winding assembly. The winding assembly is used to reel in and tighten the elastic line, and cooperate with the ligation line assembly to achieve the ligation and fixation of the target tissue after the ring is gradually tightened.

[0011] A tangent tube assembly is provided in the inner cavity of the ligature assembly, through which the elastic wire passes, and is used to cut the elastic wire after the ring is tightened;

[0012] The linear pushing assembly is arranged inside the gun body and is used to sequentially drive the push rod assembly, the ligating pipe assembly and the cutting pipe assembly to operate;

[0013] The trigger switch is set on the gun body and is used to control the operation of the linear pushing component and the winding component with one button.

[0014] Preferably, the negative pressure suction component includes a negative pressure joint, a connecting pipe and an inner tube which are arranged inside the gun body and connected in sequence, the end of the inner tube is connected to the gun barrel, the launch head is located at the end of the gun barrel, and a negative pressure switch is provided on the inner tube.

[0015] Preferably, the push rod assembly includes two pushing rods slidably arranged on both sides of the gun body, and one end of the two pushing rods corresponds to the ring sleeve. The forward movement of the pushing rod can push the ring sleeve out of the launching head. A longitudinal slider is slidably arranged in the gun body, and the sliding direction of the longitudinal slider is consistent with that of the pushing rod. The longitudinal slider is connected to the moving end of the linear pushing assembly through a gap-type connecting piece to realize the automatic disengagement and reset of the longitudinal slider from the moving end of the linear pushing assembly.

[0016] Preferably, a pushing portion is fixed to the ends of the two pushing rods, and the forward movement of the pushing portion can push the ring sleeve out of the launching head.

[0017] Preferably, the pushing portion is a pushing ring or a pushing tube, and the pushing portion is sleeved on the launch head.

[0018] Preferably, the gap-type connecting member includes a transverse slider slidably mounted on the longitudinal slider, and the sliding direction of the transverse slider is perpendicular to the sliding direction of the longitudinal slider, the inner wall of the gun body is provided with a slide groove, the slide groove has a guiding inclined surface on the side close to the wire-pushing rod, and a spring is installed on the side of the transverse slider away from the slide groove, and the spring applies a force to the transverse slider to move toward one side of the slide groove, an avoidance groove is provided at the bottom of the transverse slider, and a protrusion is fixed to the moving end of the linear pushing component;

[0019] A tension spring is installed between the longitudinal slider and the interior of the gun body, and the tension spring applies a force to the longitudinal slider to move away from the push rod.

[0020] When the transverse slider is located in the slide groove, the position of the protrusion is staggered with the avoidance groove; the transverse slider is guided by the inclined surface to move, and the position of the protrusion corresponds to the avoidance groove, so that the transverse slider and the avoidance groove are separated under the action of the tension spring.

[0021] Preferably, the ligation pipeline assembly includes an outer cover installed on the gun body, a ligation tube is slidably provided inside the outer cover, an elastic bending head is installed at one end of the ligation tube close to the launch head, a notch is provided on the elastic bending head, and an elastic cap is slidably sleeved on the other end of the ligation tube, and the elastic cap abuts against the movable end of the linear pushing assembly to realize the pushing displacement of the ligation tube.

[0022] Preferably, an annular groove is formed on the outer circumferential surface of the end portion of the ligation tube, and the elastic cap has a plurality of elastic parts, and the ends of the elastic parts have inner convex parts located in the annular groove.

[0023] Preferably, the tangent tube assembly comprises an inner tube inserted into the inner cavity of the ligation tube, one end of the inner tube extends out of the ligation tube, and the other end is movably inserted with a tubular cutter, and the end of the tubular cutter away from the inner tube has a blade;

[0024] A clamping hole is provided at one end of the inner tube for inserting the tubular cutter, an elastic sheet is provided at the corresponding end of the tubular cutter, and an outer convex portion is provided at the end of the elastic sheet. The clamping hole is located at the overlapping section where the inner tube and the tubular cutter are inserted, and the tubular cutter is provided with a cutter positioning groove. A positioning rod is inserted through the inner wall of the ligation tube, and the positioning rod passes through the cutter positioning groove.

[0025] One end of the elastic line passes through the elastic bending head, the tubular cutter, the inner tube in sequence and is connected to the winding assembly.

[0026] Preferably, the linear pushing assembly includes a pushing motor installed inside the gun body, a threaded rod is installed at the output end of the pushing motor, a pushing slider is threadedly connected to the threaded rod, and the pushing slider is the moving end of the linear pushing assembly. The pushing slider has two symmetrically arranged transverse pushing rod parts, and the two transverse pushing rod parts are both in contact with the elastic cap, and the pushing slider corresponds to the axial direction of the inner tube.

[0027] Preferably, the end of the inner tube away from the tubular cutter is provided with a notch, the inner tube portion provided with the notch is slidably inserted into the interior of the gun body, and the notch is axially corresponding to the cutter positioning groove.

[0028] Preferably, the winding assembly includes a winding motor installed inside the gun body, the output end of the winding motor is fixed with a spline, and the spline is detachably sleeved with a winding box, and the end of the elastic wire away from the ring sleeve is connected to the winding box.

[0029] The present invention also provides a method for using the electric elastic wire ligation device, comprising the following steps:

[0030] Step 1: Absorb and fix the target tissue: Hold the gun body, aim the transmitter at the target tissue to be ligated, and activate the negative pressure suction component to suck the target tissue into the transmitter under the action of negative pressure and fix it in the transmitter;

[0031] Step 2: Push the ring out: Press the trigger switch to activate the linear push assembly, pushing the ring out of the transmitter head and wrapping it around the target tissue.

[0032] Step 3: Tighten the loop: The linear pushing assembly pushes the ligature assembly to move, so that the elastic bending head and the loop's slipknot are pressed tightly together; at the same time, the winding assembly operates to gradually reel in and tighten the tail end of the elastic line; the forward resistance of the elastic bending head and the backward tension of the winding assembly work together to gradually tighten the loop until it firmly ligatures and tightens the target tissue;

[0033] Step 4: Cutting the elastic cord: The linear push assembly pushes the cutting tube assembly to move, causing the tubular cutter to press against the wall of the elastic bending head and the rear of the loop slipknot, thereby cutting the elastic cord.

[0034] Step 5: Reset: The linear push assembly runs in the opposite direction and returns to its original position, and the next operation can be carried out in a cycle.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. The invention realizes one-button control of the sequential operation of the push rod assembly, ligation pipeline assembly and tangent tube assembly by setting a trigger switch and a linear pushing assembly. Combined with the automated design of the negative pressure suction assembly and the winding assembly, the entire ligation process can be completed by simply pressing the switch, solving the problems of traditional ligation devices such as "cumbersome and complicated operation, high technical requirements for the surgeon, difficulty in standardization and standardization of the operation, and easy impact on efficacy and complications". It greatly simplifies the complex operation process of traditional ligation devices, reduces the difficulty of surgery, realizes the standardization and standardization of surgical operations, significantly shortens the operation time, reduces the incidence of complications, and improves clinical efficacy.

[0037] 2. The present invention realizes the automatic reset function of the longitudinal slider through the gap-type connecting piece design of the push rod assembly, ensuring that the state of the instrument can be quickly restored to the initial state after each operation, which is convenient for continuous use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0039] Figure 2 It is a schematic diagram of the cross-sectional plan structure of the present invention;

[0040] Figure 3 It is a schematic diagram of a first internal partial three-dimensional structure of the present invention;

[0041] Figure 4 is a schematic diagram of a second internal partial three-dimensional structure of the present invention;

[0042] Figure 5 Schematic diagram of the structure of the gap type connector in the present invention;

[0043] Figure 6It is a structural schematic diagram of the transverse slider in the present invention;

[0044] Figure 7 Schematic diagram of the partial three-dimensional structure of the gun barrel in the present invention;

[0045] Figure 8 Schematic diagram of the exploded structure of the ligating pipe assembly and the tangent pipe assembly in the present invention;

[0046] Figure 9 for Figure 8 A in the figure shows the enlarged structural diagram;

[0047] Figure 10 It is a schematic cross-sectional structural diagram of the ligation pipeline assembly and the tangent pipe assembly in the present invention;

[0048] Figure 11 for Figure 10 A schematic diagram of the structure at point B in FIG.

[0049] Figure 12 for Figure 10 The enlarged structural diagram at C in FIG.

[0050] Figure 13 It is a structural schematic diagram of the barrel kit and the gun body kit being separated according to the present invention.

[0051] The numbers in the figure represent:

[0052] 1-gun body; 11-trigger switch; 12-power socket;

[0053] 21-negative pressure connector; 22-connecting tube; 23-negative pressure switch; 24-inner tube; 25-gun barrel; 26-launching head;

[0054] 31- positioning pin; 32- pushing rod; 33- longitudinal slider; 341- transverse slider; 342- spring; 343- slide groove; 344- tension spring; 345- guide slope; 346- protrusion; 347- avoidance groove; 35- pushing part;

[0055] 4-outer cover;

[0056] 51-propelling motor; 52-threaded rod; 53-propelling slider; 54-transverse push rod;

[0057] 61-winding motor; 62-spline; 63-winding box;

[0058] 7-elastic thread; 71-ring;

[0059] 81 - ligation tube; 82 - elastic cap; 821 - elastic portion; 822 - inner convex portion; 823 - annular groove; 83 - elastic bending head; 84 - notch;

[0060] 91-inner tube; 911-notch; 92-tubular cutter; 921-cutter positioning groove; 922-positioning rod; 93-blade; 94-clamping hole; 95-elastic sheet; 96-external protrusion. DETAILED DESCRIPTION

[0061] The above and other technical features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

[0062] This embodiment provides a technical solution: an electric elastic wire ligation device, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 8 and Figure 10 As shown, it includes a gun body 1 and a negative pressure suction component, an elastic line 7, a push rod component, a ligation pipeline component, a tangent tube component, a linear pushing component, a winding component and a trigger switch 11 integrated in the gun body 1.

[0063] like Figure 1 and Figure 2 As shown, the overall shape of the gun body 1 is similar to that of a pistol, which not only conforms to ergonomic principles and is convenient for the doctor to hold and operate with one hand, but also realizes the compactness and portability of the instrument by integrating the main functional components inside the gun body. The trigger switch 11 is located at the trigger of the gun body structure to facilitate the operator to operate. The trigger switch 11 is used to control the operation of the linear pushing component and the winding component with one button; it should be noted that: the interior of the gun body 1 is also provided with a circuit board and a power socket 12 that cooperate with the trigger switch 11 to realize the control and power supply of the device.

[0064] like Figure 1 and Figure 2 As shown, the negative pressure suction component is arranged inside the gun body 1, which is used to attract and fix the target tissue. The negative pressure suction component has a launch head 26 located at the head of the gun body 1, that is, the launch head 26 is located at the muzzle of the gun body structure; the negative pressure suction component includes a negative pressure connector 21, a connecting pipe 22 and an inner tube 24 arranged inside the gun body 1 and connected in sequence, the negative pressure connector 21 is connected to the external negative pressure device through an air pipe, the end of the inner tube 24 is connected to the gun barrel 25, the launch head 26 is located at the end of the gun barrel 25, and a negative pressure switch 23 is provided on the inner tube 24. The negative pressure switch 23 is used to control the operation of the negative pressure device to generate negative pressure, aim the launch head 26 at the target tissue and press it, so that the target tissue can be attracted and fixed under the action of the negative pressure.

[0065] like Figure 7 and Figure 8As shown, one end of the elastic wire 7 forms a ring sleeve 71 with an adjustable aperture, and the ring sleeve 71 is sleeved on the launch head 26. The ring sleeve 71 can be pushed and displaced on the launch head 26. The ring sleeve 71 adopts the ring sleeve in the authorization announcement number CN 104127216 B (patent name: Elastic wire setting method in ligation device and automatic elastic wire ligation device), so it is not described in detail here. The other end of the elastic wire 7 is connected to the winding assembly. When the winding assembly is in operation, the aperture of the ring sleeve 71 is tightened to achieve tight fixation of the target tissue.

[0066] like Figures 2 to 5 The cam 71 is fixed to the gun body 1 and the cam 72 is fixed to the gun body 1. As shown in FIG, the push rod assembly is slidably arranged on the gun body 1, and is used to push the ring sleeve 71 out of the launch head 26, thereby realizing that the ring sleeve 71 will enclose the fixed target tissue; the push rod assembly includes two pushing rods 32 slidably arranged on both sides of the gun body 1, specifically: the two pushing rods 32 are slidably arranged on both sides of the gun barrel 25, and one end of the two pushing rods 32 corresponds to the ring sleeve 71, forming a symmetrical layout; further, a pushing portion 35 can be fixed to the ends of the two pushing rods 32, and the pushing portion 35 is a pushing ring or a pushing tube, and the pushing portion 35 is sleeved on the launch head 26, and the pushing portion 35 is made of metal or plastic material. The design of the pushing portion 35 ensures that the ring sleeve 71 is uniformly stressed during the pushing process, thereby avoiding the ring sleeve from tilting or falling off; in order to ensure the sliding stability of the pushing rod 32, a long waist hole is provided on the pushing rod 32, and a positioning pin 31 fixed to the gun barrel 25 is provided in the long waist hole to limit the pushing rod 32.

[0067] A longitudinal slider 33 is slidingly provided inside the gun body 1. The longitudinal slider 33 has the same sliding direction as the wire-pushing rod 32. The longitudinal slider 33 has two cross bars, and the two cross bars of the longitudinal slider 33 are respectively in contact with the two wire-pushing rods 32. When the longitudinal slider 33 moves outward, the wire-pushing rod 32 will also be pushed to move. The longitudinal slider 33 is connected to the moving end of the linear pushing assembly through a gap-type connecting piece to enable the longitudinal slider 33 to automatically disengage from the moving end of the linear pushing assembly and reset.

[0068] The function of the gap-type connector is: in the first process of the operation of the linear pushing component, the longitudinal slider 33 and the wire pushing rod 32 are pushed outward by the gap-type connector, so as to push the ring sleeve 71 away from the launch head 26. Subsequently, under the action of the gap-type connector, the linear pushing component no longer pushes the longitudinal slider 33 to move, and the longitudinal slider 33 can return to its original position by itself, preparing for the next operation. The automatic reset mechanism ensures that the push rod assembly can be restored to the standby state without manual adjustment after each operation, which provides convenience for continuous use.

[0069] like Figures 2 to 6When the cam 33 is in the unlock state, the locking cam 33 is locked and the locking cam 33 is unlocked, so that the cam 33 can be unlocked when the cam 33 is unlocked.

[0070] When the linear push assembly is not in operation, the protrusion 346 is staggered with the avoidance groove 347, and the protrusion 346 abuts against the horizontal slider 341 (refer to Figure 4 When the linear pushing assembly is running, under the action of the protrusion 346 and the transverse slider 341, the longitudinal slider 33 is pushed to move, and the tension spring 344 is stretched. At the same time, the transverse slider 341 will also slide synchronously with the longitudinal slider 33. When the transverse slider 341 contacts the guide inclined surface 345, due to the guidance of the guide inclined surface 345, the transverse slider 341 will be abutted and slide, and the spring 342 is compressed. Since the sliding direction of the transverse slider 341 is perpendicular to the sliding direction of the longitudinal slider 33, the protrusion 346 will move to correspond to the avoidance groove 347. At this time, the longitudinal slider 33 will rebound to its original position due to the tension of the tension spring 344, and the transverse slider 341 will rebound to its original position due to the thrust of the spring 342 (in the above-mentioned action process, the wire pushing rod 32 pushes the ring sleeve 71 away from the launch head 26); when the linear pushing assembly returns to its original state, the protrusion 346 will contact the second inclined surface, thereby squeezing the transverse slider 341 to move, so that the protrusion 346 can smoothly pass through the avoidance groove 347.

[0071] like Figure 1 、 Figure 8 and Figure 10As shown, the ligation pipeline assembly is arranged on the gun body 1 and is parallel to the push rod assembly, and is used to resist the slipknot of the ring sleeve 71. The ligation pipeline assembly is arranged on the lower side of the gun barrel 25; the ligation pipeline assembly includes an outer cover 4 installed on the gun body 1, and the outer cover 4 is specifically fixed to the gun barrel 25. A ligation tube 81 is slidably arranged in the outer cover 4, and an elastic bending head 83 is installed at one end of the ligation tube 81 close to the launch head 26. A notch 84 is provided on the elastic bending head 83, and the number of notches 84 can be set to 1-3. The setting of the notch 84 can facilitate the bending of the elastic bending head 83. The other end of the ligation tube 81 is slidably sleeved with an elastic cap 82, and the elastic cap 82 abuts against the moving end of the linear pushing assembly to realize the pushing displacement of the ligation tube 81. When the ligation tube 81 is pushed to move, the ligation tube 81 will push the elastic bending head 83 , and the elastic bending head 83 will abut against the corresponding part of the patient. Driven by the ligation tube 81 , the elastic bending head 83 will bend along the notch 84 .

[0072] like Figure 8 and Figure 11 As shown, an annular groove 823 is provided on the outer circumferential surface of the end of the ligation tube 81, and the elastic cap 82 has multiple elastic parts 821. A plurality of annular slits are provided on the elastic cap 82 to form the elastic parts 821. The elastic parts 821 have a certain elasticity. The end of the elastic part 821 has an inner convex part 822 located in the annular groove 823. The cooperation between the inner convex part 822 and the annular groove 823 can provide the elastic cap 82 with a certain damping force when sliding along the inner tube 91.

[0073] like Figure 8 、 Figure 9 、 Figure 10 and Figure 12 As shown, the tangent tube assembly is arranged in the inner cavity of the ligation tube 81 of the ligation line assembly, and is used to cut off the elastic line 7 after the ring sleeve 71 is tightened, leaving only the ring sleeve 71; the tangent tube assembly includes an inner tube 91 inserted into the inner cavity of the ligation tube 81, one end of the inner tube 91 extends out of the ligation tube 81, and the end extends into the gun body 1, and the other end is movably inserted with a tubular cutter 92, and the tubular cutter 92 has a blade 93 at the end away from the inner tube 91, and the blade 93 is a semi-tubular structure, and the blade 93 is used to cut the elastic line 7.

[0074] like Figure 8 、 Figure 9 、 Figure 10 and Figure 12As shown, a clamping hole 94 is provided at one end of the inner tube 91 near the tubular cutter 92, and an elastic sheet 95 is provided at the corresponding end of the tubular cutter 92. Two adjacent slits are provided at the end of the tubular cutter 92 to form an elastic sheet 95. The elastic sheet 95 has a certain elasticity, and the end of the elastic sheet 95 has an outer protrusion 96. The clamping hole 94 is located at the overlapping section where the inner tube 91 and the tubular cutter 92 are plugged in. The tubular cutter 92 is provided with a cutter positioning groove 921. The positioning groove 921 has a certain size in the axial direction. A positioning rod 9 is inserted through the inner wall of the ligation tube 81. 22, and the positioning rod 922 passes through the cutter positioning groove 921. The positioning rod 922 can pull out the ligation tube 81 so that the tubular cutter 92 can be installed in the ligation tube 81, which can ensure that the tubular cutter 92 will not rotate at any angle. When the ligation tube 81 is displaced, the tubular cutter 92, the elastic bending head 83 and the ligation tube 81 can be displaced synchronously through the connection of the positioning rod 922 until the clamping hole 94 corresponds to the outer protrusion 96, and the outer protrusion 96 is clamped into the clamping hole 94, thereby making it impossible for the inner tube 91 and the tubular cutter 92 to be displaced.

[0075] like Figure 8 、 Figure 9 、 Figure 10 and Figure 12 As shown, in order to ensure that the clamping hole 94 corresponds to the circumferential direction of the outer protrusion 96, a notch 911 is provided at the end of the inner tube 91 away from the tubular cutter 92. The portion of the inner tube 91 with the notch 911 is slidably inserted into the interior of the gun body 1. A sliding hole is provided inside the gun body 1 that is adapted to the outer shape of the end of the inner tube 91. The end of the inner tube 91 is slidably arranged in the sliding hole, so the circumferential angle of the inner tube 91 will not flip, thereby realizing the circumferential positioning of the inner tube 91 and the tubular cutter 92.

[0076] When the moving end of the linear pushing assembly pushes, the ligation tube 81 can be pushed to move. When the elastic bending head 83 abuts against the corresponding part of the target tissue and the abutment force between the elastic cap 82 and the moving end of the linear pushing assembly exceeds the set threshold, the elastic cap 82 will break away from the constraint of the annular groove 823, driving the elastic cap 82 to slide along the axis of the ligation tube 81.

[0077] like Figures 2 to 4As shown, the linear pushing assembly is arranged inside the gun body 1, and is used to drive the push rod assembly, the ligation pipeline assembly and the tangent tube assembly to operate in sequence; the linear pushing assembly includes a pushing motor 51 installed inside the gun body 1, and the output end of the pushing motor 51 is installed with a threaded rod 52, and the end of the threaded rod 52 away from the pushing motor 51 is rotatably connected to the inner wall of the gun body 1, and a pushing slider 53 is threadedly connected to the threaded rod 52, and the pushing slider 53 is slidably engaged in the gun body 1 so that it will not rotate with the threaded rod 52. The pushing slider 53 is the moving end of the linear pushing assembly, and the pushing slider 53 has two symmetrically arranged transverse pushing rod portions 54, and the two transverse pushing rod portions 54 are both in contact with the elastic cap 82, and the pushing slider 53 is axially corresponding to the inner tube 91.

[0078] The process of the linear push component operation is:

[0079] In the first process of the linear push assembly operation, the push rod assembly is pushed to push the ring 71 out of the launch head 26;

[0080] In the second process of the linear pushing assembly, the two horizontal push rods 54 abut against the elastic cap 82, pushing the ligation tube 81 to move. At the same time, due to the setting of the positioning rod 922, the tubular cutter 92 and the elastic bending head 83 are also driven to move synchronously. The ligation tube 81 pushes the elastic bending head 83 to bend and presses the slipknot of the ring sleeve 71 until the ligation tube 81 is tightened and cannot move. At this time, the outer protrusion 96 enters the clamping hole 94.

[0081] In the third process of the operation of the linear pushing assembly, since the ligation tube 81 is pressed and cannot be displaced, under the continued push of the horizontal pushing rod 54, the inner protrusion 822 will disengage from the annular groove 823, and the elastic cap 82 will slide along the axis of the ligation tube 81, and the pushing slider 53 will abut against the end of the inner tube 91. The pushing slider 53 will push the inner tube 91 and the tubular cutter 92 to one side of the elastic bending head 83, and the blade 93 will cut off the elastic line 7 located in the elastic bending head 83 that is bent into a nearly right angle.

[0082] like Figures 1 to 3 As shown, the end of the elastic wire 7 away from the annulus 71 passes through the elastic bending head 83, the tubular cutter 92, the inner tube 91, and is connected to the winding assembly. The winding assembly is arranged on the gun body 1 and is used to wind and tighten the elastic wire 7. The winding assembly cooperates with the ligation pipeline assembly to achieve the goal of gradually tightening the annulus 71 and ligating the target tissue. The winding assembly includes a winding motor 61 installed inside the gun body 1. The output end of the winding motor 61 is fixed with a spline 62. The spline 62 is removable and connected to the winding box 63. The end of the elastic wire 7 away from the annulus 71 is connected to the winding box 63.

[0083] When the winding motor 61 is running, the winding box 63 is driven to rotate, so that the elastic wire 7 is gradually wound onto the winding box 63. Under the dual forces of the elastic wire 7 being pulled and the ligation tube 81 pushing, the ring 71 is tightened.

[0084] like Figure 13 As shown, in other embodiments, the barrel 25, the outer cover 4, the ligating line assembly, the wire cutting tube assembly and the winding box 63 constitute a barrel kit, and the remaining structure is a gun body kit. The barrel kit and the gun body kit are detachably connected by a buckle. When in use, the barrel kit is disposable.

[0085] A method for using an electric elastic thread ligation device comprises the following steps:

[0086] Step 1: Absorb and fix the target tissue: Hold the gun body, aim the transmitter head 26 at the target tissue to be ligated, and activate the negative pressure suction component to suck the target tissue into the transmitter head 26 under the action of negative pressure.

[0087] Step 2: Pushing out the ring: Pressing the trigger switch 11, the linear push assembly operates, pushing the ring out of the transmitter head 26, and making the ring go around the periphery of the target tissue;

[0088] Step 3: Tighten the loop: The linear pushing assembly pushes the ligature assembly to move, so that the elastic bending head 83 is pressed against the slipknot of the loop; at the same time, the winding assembly runs, gradually winding and tightening the tail end of the elastic line 7; the forward resistance force of the elastic bending head 83 and the backward tension of the winding assembly work together to gradually tighten the loop until it firmly ligatures and tightens the target tissue;

[0089] Step 4: Cutting the elastic cord 7: The linear push assembly pushes the cutting tube assembly to move, causing the tubular cutter 92 to press against the wall of the elastic bending head 83 and simultaneously press against the rear of the loop slipknot, thereby cutting the elastic cord;

[0090] Step 5: Reset: The linear push assembly runs in the opposite direction and returns to its original position, and the next operation can be carried out in a cycle.

[0091] The above description is merely a preferred embodiment of the present invention and is intended to be illustrative rather than restrictive of the present invention. Those skilled in the art will appreciate that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope of the claims, all of which fall within the scope of protection of the present invention.

Claims

1. An electric elastic wire ligation device, characterized in that: include: gun body; A negative pressure suction component is provided inside the gun body and is used to attract and fix the target tissue. The negative pressure suction component has a transmitting head located at the head of the gun body; An elastic wire, one end of which forms a ring with adjustable aperture, and the ring is sleeved on the launch head; A push rod assembly is slidably mounted on the gun body and is used to push the ring out of the firing head; The ligature line assembly is arranged on the gun body and parallel to the push rod assembly, and is used to press the slip knot of the ring; The winding assembly is provided on the gun body. The other end of the elastic line is connected to the winding assembly. The winding assembly is used to reel in and tighten the elastic line, and cooperate with the ligation line assembly to achieve the ligation and fixation of the target tissue after the ring is gradually tightened. A tangent tube assembly is provided in the inner cavity of the ligature assembly, through which the elastic wire passes, and is used to cut the elastic wire after the ring is tightened; The linear pushing assembly is arranged inside the gun body and is used to sequentially drive the push rod assembly, the ligating pipe assembly and the cutting pipe assembly to operate; A trigger switch is provided on the gun body and is used to control the operation of the linear push assembly and the winding assembly with one button; The ligation pipeline assembly includes an outer cover installed on the gun body, a ligation tube is slidably arranged inside the outer cover, an elastic bending head is installed at one end of the ligation tube close to the launch head, a notch is provided on the elastic bending head, and an elastic cap is slidably sleeved on the other end of the ligation tube, and the elastic cap abuts against the moving end of the linear pushing assembly to realize the pushing displacement of the ligation tube.

2. The electric elastic thread ligation device according to claim 1, characterized in that: The negative pressure suction component includes a negative pressure joint, a connecting pipe and an inner tube arranged inside the gun body and connected in sequence. The end of the inner tube is connected to the gun barrel. The launch head is located at the end of the gun barrel. A negative pressure switch is provided on the inner tube.

3. The electric elastic thread ligation device according to claim 1, characterized in that: The push rod assembly includes two pushing rods slidably arranged on both sides of the gun body, and one end of the two pushing rods corresponds to the ring sleeve. The forward movement of the pushing rod can push the ring sleeve out of the launching head. A longitudinal slider is slidably arranged in the gun body, and the sliding direction of the longitudinal slider is consistent with the sliding direction of the pushing rod. The longitudinal slider is connected to the moving end of the linear pushing assembly through a gap-type connecting piece to realize the automatic disengagement and reset of the longitudinal slider from the moving end of the linear pushing assembly.

4. The electric elastic thread ligation device according to claim 3, characterized in that: A pushing portion is fixed to the ends of the two thread-pushing rods, and the forward movement of the pushing portion can push the ring sleeve out of the launching head.

5. The electric elastic thread ligation device according to claim 4, characterized in that: The pushing portion is a pushing ring or a pushing tube, and the pushing portion is sleeved on the launch head.

6. The electric elastic thread ligation device according to claim 3, characterized in that: The gap-type connecting member includes a transverse slider slidably mounted on the longitudinal slider, and the sliding direction of the transverse slider is perpendicular to the sliding direction of the longitudinal slider, the inner wall of the gun body is provided with a sliding groove, the side of the sliding groove close to the wire-pushing rod has a guiding inclined surface, and the side of the transverse slider away from the sliding groove is provided with a spring, the spring gives the transverse slider a force to move toward one side of the sliding groove, the bottom of the transverse slider is provided with an avoidance groove, and the moving end of the linear pushing component is fixed with a protrusion; A tension spring is installed between the longitudinal slider and the interior of the gun body, and the tension spring applies a force to the longitudinal slider to move away from the push rod. When the transverse slider is located in the slide groove, the position of the protrusion is staggered with the avoidance groove; the transverse slider is guided by the inclined surface to move, and the position of the protrusion corresponds to the avoidance groove, so that the transverse slider and the avoidance groove are separated under the action of the tension spring.

7. The electric elastic thread ligation device according to claim 1, characterized in that: An annular groove is formed on the outer circumferential surface of the end portion of the ligation tube. The elastic cap has a plurality of elastic parts. The ends of the elastic parts have inner convex parts located in the annular groove.

8. The electric elastic thread ligation device according to claim 1, characterized in that: The tangent tube assembly includes an inner tube inserted into the inner cavity of the ligation tube, one end of the inner tube extends out of the ligation tube, and the other end is movably inserted with a tubular cutter, and the end of the tubular cutter away from the inner tube has a blade; A clamping hole is provided at one end of the inner tube for inserting the tubular cutter, an elastic sheet is provided at the corresponding end of the tubular cutter, and an outer convex portion is provided at the end of the elastic sheet. The clamping hole is located at the overlapping section where the inner tube and the tubular cutter are inserted, and the tubular cutter is provided with a cutter positioning groove. A positioning rod is inserted through the inner wall of the ligation tube, and the positioning rod passes through the cutter positioning groove. One end of the elastic line passes through the elastic bending head, the tubular cutter, the inner tube in sequence and is connected to the winding assembly.

9. The electric elastic thread ligation device according to claim 8, characterized in that: The linear pushing assembly includes a pushing motor installed inside the gun body, a threaded rod is installed at the output end of the pushing motor, a pushing slider is threadedly connected to the threaded rod, and the pushing slider is the moving end of the linear pushing assembly. The pushing slider has two symmetrically arranged transverse pushing rod parts, and the two transverse pushing rod parts are both in contact with the elastic cap, and the pushing slider corresponds to the axial direction of the inner tube.

10. The electric elastic thread ligation device according to claim 8, characterized in that: The end of the inner tube away from the tubular cutter is provided with a notch, the inner tube portion provided with the notch is slidably plugged into the interior of the gun body, and the notch is axially corresponding to the cutter positioning groove.

11. The electric elastic thread ligation device according to claim 1, characterized in that: The winding assembly includes a winding motor installed inside the gun body, a spline is fixed to the output end of the winding motor, and the spline is detachably sleeved with a winding box, and the end of the elastic wire away from the ring sleeve is connected to the winding box.

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