Electric loop ligature device

Abstract

The invention discloses an electric loop ligature device which comprises a shell, a driving device, a negative pressure device and a front device, the driving device is arranged in the shell and located above the negative pressure device, the negative pressure device is arranged in the shell, and the front device is arranged at the front end of the shell and arranged on the outer side of the shell. One end of the preposed device is clamped on the shell, the preposed device is connected with the driving device, and the preposed device is disposable, so that after the preposed device is used, the preposed device can be directly taken down from the shell and does not need to be cleaned.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an electric ligation device. Background Technology

[0002] Hemorrhoids, a common anorectal disease, can be treated in various ways, among which banding therapy is widely used due to its simplicity and effectiveness. The electric banding device, an important tool for implementing banding therapy, typically consists of a cannula and a ring. The ring is fitted onto the suction end of the cannula and connected to the main body of the banding device via a connecting wire. During operation, the cannula first uses negative pressure to suction the hemorrhoid tissue, and then the ring automatically fits around the base of the hemorrhoid tissue, thus achieving banding.

[0003] However, the existing elastic cord and rubber ring of the ligator are complicated to install, and the reinstallation operation is complicated and time-consuming. In addition, the front device used to place the elastic cord and rubber ring cannot be removed from the ligator. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of existing ligatures, such as the complex installation of elastic cords and rubber rings, cumbersome and time-consuming reinstallation, and the inability to remove the pre-installation device for holding the elastic cords and rubber rings from the ligature. The invention proposes an electric ligature, comprising a housing, a drive unit, a negative pressure device, and a pre-installation device. The drive unit is located inside the housing and above the negative pressure device, which is also located inside the housing. The pre-installation device is located at the front end of the housing and on the outside of the housing, with one end snapped onto the housing and connected to the drive unit.

[0005] In the technical solution of this invention, the pre-mount device is connected to the outer casing via a first latch and a second latch. The outer casing is also provided with a locking block for locking the first latch and the second latch. Therefore, after the elastic cord and rubber ring on the existing pre-mount device are used up, the release button on the outer casing can be pressed to remove the first latch and the second latch from the latch, thereby releasing the locking relationship between the pre-mount device and the outer casing. Therefore, after the elastic cord and rubber ring on the existing pre-mount device are used up, there is no need to reinstall them. This solves the shortcomings mentioned in the technical background, such as the complicated installation of the elastic cord and rubber ring of the existing bandage, the complicated and time-consuming operation during reinstallation, and the fact that the pre-mount device used to hold the elastic cord and rubber ring cannot be removed from the bandage.

[0006] In a preferred embodiment of the present invention, the driving device includes a housing, a trigger, a rubber ring pusher assembly, an elastic cord pusher assembly, a shift knob assembly, a gear assembly, and an air guide cylinder. The housing is connected to the interior of the outer shell, the air guide cylinder is disposed inside the housing, the trigger is located at one end of the air guide cylinder and below the air guide cylinder, the trigger is hinged to the housing and abuts against the rubber ring pusher assembly and the elastic cord pusher assembly, the rubber ring pusher assembly is disposed below the guide cylinder and is connected to the gear assembly, and the elastic cord pusher assembly is positioned... The air guide cylinder is located below and inside the rubber ring pusher assembly. The rubber ring pusher assembly is connected to the elastic cord pusher assembly. The gear assembly is located at the other end of the guide cylinder and above the elastic cord pusher assembly. The shift knob assembly is located above the rubber ring pusher assembly and is connected to the elastic cord pusher assembly. When using the elastic cord, the drive device can wind up the elastic cord through the gear assembly. When using the rubber ring, the drive device can push the rubber ring down from the front assembly in sequence, so that the rubber ring wraps around the hemorrhoid.

[0007] In a preferred embodiment of the present invention, the rubber ring pusher assembly includes a first pusher, a rubber ring pusher rod, a baffle, a first reset rod, a guide plate, and a first reset spring. The first pusher is positioned below the air guide cylinder, with one end of the first pusher abutting against the trigger and the other end connected to the gear assembly. Two rubber ring pushers are provided, each positioned at one end of the first pusher located on the gear assembly, and the two rubber ring pushers are symmetrically arranged around the air guide cylinder. Both rubber ring pushers are connected to the first pusher. The baffle is positioned on the air guide cylinder. The end is connected to the housing. Both rubber ring push rods are slidably connected to the baffle. The first reset rod is located at one end of the first push frame located on the trigger. The first reset rod is connected to the guide plate. The guide plate is located above the first reset rod and connected to the housing. The first reset spring is located on one side of the guide plate and sleeved on the first reset rod. The two ends of the first reset spring abut against the first reset rod and the guide plate, respectively. When the trigger is pulled, the second push frame will push the outer sleeve outward, and then the outer sleeve will push the four rubber rings out of the inner sleeve in sequence.

[0008] In a preferred embodiment of the present invention, the gear assembly includes a gear carrier, a driving wheel, a driven wheel, an internal gear, a spur gear, a ratchet, a pawl, a torsion spring, and a ratchet housing cover. The gear carrier is fitted onto the air guide cylinder. The driven wheel is fitted onto one end of the air guide cylinder and slidably connected to the first pusher frame. The internal gear is located at one end of the driven wheel and connected to it, and is also connected inside a baffle. The driving wheel is located on one side of the gear carrier and connected to it, and the driving wheel and the driven wheel mesh. The ratchet is located at the end of the driving wheel and connected to it. The spur gear... The gear assembly is positioned between the ratchet and the drive wheel, with the spur gear located above the first pusher. The spur gear is rotatably connected to the drive wheel and meshes with the pre-set teeth on the first pusher. There are two ratchet teeth, one above and one below the ratchet, both connected to the spur gear and meshing with the ratchet. A torsion spring is provided on one side of each ratchet tooth, with both ends connected to the ratchet tooth and the spur gear, respectively. The ratchet chamber cover is located outside the ratchet teeth and snaps onto the outer casing. When the gear assembly rotates, it can rewind and tighten the elastic cord.

[0009] In a preferred embodiment of the present invention, the elastic cord pusher assembly includes a second pusher, a pusher block, a shuttle-shaped slider, a stop lever, a second reset lever, a second reset spring, and an elastic cord pusher. The second pusher is disposed on one side of the air guide cylinder, and the pusher block is disposed in the middle of the air guide cylinder and the second pusher. The pusher block is located on one side of the air guide cylinder and abuts against the air guide cylinder. The shuttle-shaped slider is disposed on one side of the pusher block and hinged to the pusher block, and the shuttle-shaped slider is disposed in a preset groove of the second pusher. The stop lever is connected to the side wall of the shuttle-shaped slider and is disposed on the shift knob. Inside the assembly, a second reset rod is located at one end of the second push frame and slidably connected to the guide plate. A second reset spring is sleeved on the second reset rod, and both ends of the second reset spring abut against the guide plate and the second reset rod, respectively. A spring wire push rod is connected to the other end of the second push frame, and one end of the spring wire push rod passes through the first push frame and is slidably connected to the baffle. When the trigger is pulled, the first push frame moves toward the gear assembly. When the first push frame moves toward the gear assembly, it will simultaneously drive the rubber ring push rod and the first reset rod to move.

[0010] In a preferred embodiment of the present invention, the shift knob assembly includes a knob, a shift grid, a third spring, a fixing pin, and a guide groove. The knob is disposed outside the housing and connected to the housing. The shift grid is located on one side of the second push frame and above the first push frame. The fixing pin is connected to the side wall of the knob. The shift grid is connected to the knob via the fixing pin. Guide grooves are provided at the positions corresponding to the stop lever and the fixing pin of the shift grid. The third spring is vertically disposed below the shift grid. When the knob rotates counterclockwise, the fixing pin on the knob will drive the shift grid to move upward. When the shift grid moves upward, it will drive the shuttle-shaped slider to rotate upward via the stop lever. Conversely, when the knob rotates clockwise, the fixing pin on the knob will drive the shift grid to move downward.

[0011] In a preferred embodiment of the present invention, the negative pressure device includes a fixed plate, a power switch, a pressure relief button, a battery, an air pump, an indicator light, and a guide tube. The fixed plate is vertically connected to the inside of the housing. The power switch and the pressure relief button are both connected to the fixed plate. There are multiple indicator lights arranged vertically, and the indicator lights are located on one side of the pressure relief button. The housing has slots at the positions of the power switch, the pressure relief button, and the indicator lights. The guide tube is located inside the housing and on one side of the fixed plate. Both ends of the guide tube are connected to the air cylinder and the air pump, respectively. The pressure relief button is connected to the guide tube. The air pump is located below the guide tube and electrically connected to the battery. The battery is located below the air pump and electrically connected to the air pump, and the battery is electrically connected to the indicator light. When the power switch is pressed, the air pump is started, and the indicator light also lights up. Then, when the pressure relief button is pressed, external air enters the interior of the air cylinder, thereby relieving the negative pressure inside the air cylinder.

[0012] In a preferred embodiment of the present invention, the outer casing is composed of a left shell, a right shell, and a battery compartment. The inner walls of the left and right shells are provided with locking blocks for locking the front-end device and release buttons for disconnecting the connection between the front-end device and the outer casing. When it is necessary to remove the front-end device from the outer casing, the two release buttons are pressed into the interior of the outer casing simultaneously to press the two first latches out from the locking blocks, and then the first latches can be removed from the interior of the outer casing.

[0013] In a preferred embodiment of the present invention, the pre-installed device includes a fixing block, a first buckle, an outer sleeve, an elastic cord driven rod, an inner sleeve, a binding pin, a transmission gear, an elastic cord tube, and a guide block. There are two first buckles, each located on one side of the fixing block. The fixing block is located at one end of the outer sleeve and connected to it. There are two elastic cord driven rods, both connected to the outer sleeve. The inner sleeve is slidably disposed inside the outer sleeve. The binding pin is located at one end of the inner sleeve and inside the fixing block, and is connected to the transmission gear. The transmission gear is located outside the fixing block and rotatably connected to the inner sleeve. The elastic cord tube is located below the outer sleeve. The guide block is located below the outer sleeve and connected to it. One end of the elastic cord tube is slidably disposed inside the guide block. An elastic cord is located inside the elastic cord tube. When the elastic cord push rod is pushed out, it drives the elastic cord tube to move synchronously towards the guide block. When the elastic cord tube moves towards the guide block, it can cut the elastic cord by forming a sharp surface through a chamfer.

[0014] In a preferred embodiment of the present invention, the pre-mounted device includes a second buckle, an outer sleeve, a rubber ring, an inner sleeve, a third return spring, an indicator light, and a pressure plate. The second buckle is fitted onto the outer sleeve. There are four rubber rings, each fitted onto the other end of the outer sleeve. The inner sleeve is located inside the outer sleeve. The pressure plate is connected to the end of the inner sleeve located at the buckle. The third return spring is located between the pressure plate and the second buckle, and is fitted onto the pressure plate. The two ends of the third return spring respectively abut against the pressure plate and the second buckle. The outer sleeve is inserted into a pre-set groove in the inner sleeve at one end of the rubber ring, and the inner sleeve abuts against the rubber ring. When the trigger is pulled, the first pusher will drive the pressure plate and the outer sleeve forward through the rubber ring pusher rod. When the outer sleeve moves outward, it will push down the rubber ring on the inner sleeve. The rubber ring 423 itself is elastic, so after the outermost rubber ring of the inner sleeve is pushed down by the outer sleeve, it will wrap around the hemorrhoid through its own elasticity.

[0015] The advantages of this invention compared with the prior art are as follows: the pre-installation device in this invention is a disposable design, so after the pre-installation device is used, it can be directly removed from the outer shell without cleaning. In addition, the inner shell is equipped with a negative pressure device, so the bandaging device does not require external negative pressure suction during use. At the same time, the driving device can drive two different pre-installation devices during use. The rubber rings are pushed out sequentially under the action of the outer sleeve through the staggered arrangement of the inner sleeve and the outer sleeve in the pre-installation device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an electric bandaging device. Figure 2 A schematic diagram of the outer casing structure of an electric banding device; Figure 3 A bottom view schematic diagram of an electric bandaging device; Figure 4 A bottom view schematic diagram of an electric bandaging device; Figure 5 A schematic diagram of the internal structure of the housing of an electric banding device; Figure 6 This is a schematic diagram of the negative pressure device structure of an electric ligator (the battery compartment is a single unit, with a section removed to show the internal structure). Figure 7 This is a schematic diagram showing the connection between the drive unit and the outer casing of an electric cable tie (the battery compartment is a single unit, with a section removed to show the internal structure). Figure 8 for Figure 7 A schematic diagram of point A; Figure 9 A schematic diagram of the drive device structure for an electric banding device; Figure 10 This is a schematic diagram showing the connection between the trigger and the housing structure of an electric slinger. Figure 11 This is a schematic diagram of the internal structure of a power cable tie (the box is a single unit, with a section removed to show the internal structure). Figure 12 This is a bottom view of the internal structure of a power cable tie (the box is a single unit, with a section removed to show the internal structure). Figure 13 This is a schematic diagram of the rubber ring pusher assembly of an electric banding device (the housing is a single unit, with one section removed to show the internal structure). Figure 14 This is a schematic diagram showing the connection between the rubber ring pusher assembly and the gear assembly of an electric banding device (the housing is a single unit, with one piece removed to show the internal structure). Figure 15 This is a schematic diagram showing the connection between the rubber ring pusher assembly and the trigger structure of an electric banding device (the housing is a single unit, with one piece removed to show the internal structure). Figure 16 This is a schematic diagram showing the connection between the first push frame and the driven wheel structure of an electric ligator (the housing is a single unit, with one section removed to show the internal structure). Figure 17 A left-side schematic diagram of the first pusher frame of an electric banding device; Figure 18 A schematic diagram showing the connection between the first push frame and the spur gear structure of an electric banding device; Figure 19 A schematic diagram of the gear assembly structure of an electric banding device; Figure 20 for Figure 19 A schematic diagram of point B; Figure 21 A schematic diagram of the left-side structure of the second pusher frame of an electric bandaging device; Figure 22 A schematic diagram of the second pusher frame structure of an electric banding device; Figure 23 This is a schematic diagram showing the connection between the second reset rod and the guide plate structure of an electric bandaging device. Figure 24 A schematic diagram of the push block structure of an electric banding device; Figure 25 A schematic diagram of the shift knob assembly of an electric banding device; Figure 26 A schematic diagram showing the connection between the knob and the transposition grid structure of an electric banding device; Figure 27 A schematic diagram of the pre-device structure of an electric banding device; Figure 28 A schematic diagram of the elastic cord of an electric banding device; Figure 29 This is a schematic diagram of the internal structure of the fixing block of an electric bandaging device (the fixing block and the first clip are a single unit; one part is removed to show the internal structure). Figure 30 for Figure 29 A schematic diagram of point C; Figure 31 This is an exploded structural diagram of a pre-device of an electric banding device. Figure 32 A schematic diagram of the second snap-fit ​​structure of an electric bandaging device; Figure 33 A schematic diagram of the inner tube structure of an electric ligator; Figure 34 A schematic diagram of the outer tube structure of an electric ligator; Figure 35 This is a schematic diagram showing the connection between the outer tube and inner tube of an electric ligator. Figure 36 A top view schematic diagram of the outer tube structure of an electric ligator; Figure 37 This is a schematic diagram of a half-section of DD at 36mm. Figure 38 for Figure 37 A schematic diagram of point E; Figure 39 for Figure 37 A schematic diagram of point F. Detailed Implementation

[0017] The following will refer to the appendices in the embodiments of the present invention. Figure 1-39 The technical solutions in the embodiments of the present invention will be described in detail below. Example 1

[0018] like Figure 1-5As shown, an electric bandaging device includes a housing 1, a drive unit 2, a negative pressure device 3, and a pre-installed device 4. The housing 1 is made of rigid plastic (such as polypropylene) and is shaped like a pistol. The housing 1 consists of a left shell 11, a right shell 12, and a battery compartment 13. The left shell 11 and the right shell 12 are connected by screws. The battery compartment 13 is located below the left shell 11 and the right shell 12 and is snapped onto them. The drive unit 2 is located inside the housing 1 and above the negative pressure device 3. When using the elastic cord 9, the drive unit 2 can retract the elastic cord 9. The negative pressure device 3 is connected inside the housing 1 and located at the handle of the housing 1, and is connected to the drive unit 2. The preamplifier 4 is located at the front end of the housing 1 and is situated on the exterior of the housing 1. The inner walls of the left and right housings 11 and 12 are provided with locking blocks 14 for securing the preamplifier 4. Both the left and right housings 11 and 12 also have release buttons 15 that disconnect the preamplifier 4 from the housing 1. The release buttons 15 are made of elastic plastic, and one end of each button is adhered to the left and right housings 11 and 12. Both the left and right housings 11 and 12 have slots at the locations of the release buttons 15. One end of the preamplifier 4 is secured to the housing 1, and the preamplifier 4 is connected to the drive device 2.

[0019] like Figure 6-8As shown, the negative pressure device 3 includes a fixed plate 31, a power switch 32, a pressure relief button 33, a battery 34, an air pump 35, indicator lights 36, and a guide tube 37. The fixed plate 31 is vertically arranged inside the outer casing 1. When the left outer casing 11 and the right outer casing 12 are combined, the left outer casing 11 and the right outer casing 12 clamp and limit the position of the fixed plate 31. The power switch 32 is connected to the fixed plate 31 and is electrically connected to the air pump 35, which can be turned on or off. The pressure relief button 33 is located on one side of the power switch 32. The fixed plate 31 has a slot at the position of the pressure relief button 33, which is slidably connected to the fixed plate 31 and connected to the guide tube 37. There are multiple indicator lights 36 arranged vertically, and each indicator light 36 is connected to the fixed plate 31 (preferably LED lights). The outer casing 1 has slots at the positions of the power switch 32, the pressure relief button 33, and the indicator lights 36. The guide tube 37 is located inside the outer casing 1 and on one side of the fixing plate 31. Both ends of the guide tube 37 are connected to the air cylinder 23 and the air pump 35 respectively via pipes. The air pump 35 is located below the guide tube 37 and is electrically connected to the battery 34. The battery 34 is located below the air pump 35 and is electrically connected to the air pump 35. The battery 34 is also electrically connected to the indicator light 36. The battery 34 is located inside the battery compartment 13, and its lower end is snapped onto the inner wall of the battery compartment 13. The battery 34 used is a rechargeable battery. The air pump 35 is clamped and fixed in the middle of the left outer casing 11 and the right outer casing 12. When the power switch 32 is pressed, the air pump 35 will be started, and the indicator light 36 will also light up. Then, when the pressure relief button 33 is pressed, external air will enter the interior of the air cylinder 23, thereby relieving the negative pressure inside the air cylinder 23.

[0020] like Figure 9-12As shown, the drive device 2 includes a housing 21, a trigger 22, a rubber ring pusher assembly 5, an elastic cord pusher assembly 6, a shift knob assembly 7, a gear assembly 8, and an air guide cylinder 23. The housing 21 is located inside the outer shell 1. When the left and right shells 11 and 12 are connected by screws, the housing 21 is clamped and fixed by the left and right shells 11 and 12. The air guide cylinder 23 is located inside the housing 21 along its length. One end of the air guide cylinder 23 is connected to the negative pressure assembly via a pipe. After the front assembly is connected to the shell, the other end of the air guide cylinder 23 is inserted into the interior of the front assembly. The trigger 22 is located at one end of the air guide cylinder 23 and is positioned below it. The top of the trigger 22 is hinged to the outer shell 1, and the bottom of the trigger 22 passes through the outer shell 1 and is located outside the outer shell 1. Both the left and right shells 11 and 12 have slots at the positions of the trigger 22. The rubber ring pusher assembly 5 is located inside the housing 21, below the guide cylinder. One end of the rubber ring pusher assembly 5 is slidably connected to the gear assembly 8, and the other end is connected to the housing 21. The elastic wire pusher assembly 6 is located below the air guide cylinder 23, inside the rubber ring pusher assembly 5, with both ends connected to the rubber ring pusher assembly 5. The gear assembly 8 is located at the other end of the guide cylinder and above the elastic wire pusher assembly 6, connected to the rubber ring pusher assembly. The shift knob assembly 7 is located above the rubber ring pusher assembly 5 and connected to the elastic wire pusher assembly 6.

[0021] like Figure 13-18As shown, the rubber ring pusher assembly 5 includes a first pusher 51, a rubber ring pusher 52, a baffle 53, a first reset rod 54, a guide plate 55, and a first reset spring 56. The first pusher 51 is arranged below the air cylinder 23 along its length. The first pusher 51 is located at one end of the trigger 22 and abuts against the trigger 22. When the trigger 22 is pulled, the trigger 22 will push the first pusher 51 forward. The other end of the first pusher 51 is slidably connected to the driven wheel 83. There are two rubber ring pushers 52, both of which are arranged at one end of the first pusher 51 located in the gear assembly 8. The two rubber ring pushers 52 are symmetrically arranged on both sides of the air cylinder 23 with the axis of the air cylinder 23 as the center, and the axes of the two rubber ring pushers 52 are parallel to the axis of the air cylinder 23. One end of each of the two rubber ring push rods 52 is bonded to the first push frame 51. A baffle 53 is located at the other end of the two rubber ring push rods 52, and a through hole is provided at the position of each of the two rubber ring push rods 52. The rubber ring push rods 52 pass through the pre-set through holes in the baffle 53. The first reset rod 54 is located at one end of the first push frame 51 near the trigger 22, and one end of the first reset rod 54 is hinged to the first push frame 51. The other end of the first reset rod 54 passes through a pre-set through hole in the guide plate 55. The guide plate 55 is vertically positioned above the trigger 22 and is snapped onto the inner wall of the housing 21. The air guide cylinder 23 passes through the pre-set through hole in the guide plate 55 at one end and is connected to the negative pressure assembly. The first return spring 56 is located on the side of the guide plate 55 where the negative pressure component is located, and the first return spring 56 is sleeved on the first return rod 54. The two ends of the first return spring 56 abut against the guide plate 55 and the first return spring 56 return rod, respectively. When the trigger 22 is pulled, the first pusher 51 moves towards the gear assembly 8. When the first pusher 51 moves towards the gear assembly 8, it simultaneously drives the rubber ring push rod 52 and the first return rod 54 to move. At this time, the rubber ring push rod 52 will push outward, and the first return rod 54 will squeeze the first return spring 56, thereby causing the first return spring 56 to undergo elastic deformation and store force. Then, when the trigger 22 is released, the first return spring 56 will return the first pusher 51 and the rubber ring push rod 52 to their original positions. The first pusher 51 has multiple teeth at the position of the spur gear 85 of the gear assembly 8, and the teeth on the first pusher 51 mesh with the spur gear 85. Therefore, when the first pusher 51 moves in the direction of the gear assembly 8 or is reset, it will drive the spur gear 85 to rotate synchronously.

[0022] like Figures 19-20As shown, the gear assembly 8 includes a gear carrier 81, a driving gear 82, a driven gear 83, an internal gear 84, a spur gear 85, a ratchet 86, a pawl 87, a torsion spring 88, and a ratchet compartment cover 89. The gear carrier 81 is fitted onto the air guide cylinder 23, which passes through a pre-set through hole in the center of the gear carrier 81. The driven gear 83 is fitted onto one end of the air guide cylinder 23, which passes through a pre-set through hole in the center of the driven gear 83. The internal gear 84 is located at the center of the baffle 53 and is rotatably connected to the baffle 53. The internal gear 84 is connected to the driven gear 83, so when the driven gear 83 rotates, it will drive the internal gear 84 to rotate synchronously. The driving gear 82 is located on one side of the gear carrier 81 and is rotatably connected to the gear carrier 81, and the driving gear 82 meshes with the driven gear 83. Both the driving wheel 82 and the driven wheel 83 are bevel gears. A ratchet 86 is located at the end of the axle of the driving wheel 82 and is bonded to it. A spur gear 85 is positioned between the ratchet 86 and the driving wheel 82, and is located above the first push frame 51. The spur gear 85 is rotatably connected to the driving wheel 82. There are two pawls 87, one above and one below the ratchet 86, and both pawls 87 are hinged to the side wall of the spur gear 85 on the side of the ratchet 86. Both pawls 87 mesh with the ratchet 86. A torsion spring 88 is located on one side of each pawl 87, positioned between the pawl 87 and the spur gear 85. The torsion spring 88 is sleeved on the hinge shaft of the pawl 87, and its two ends are connected to the pawl 87 and the spur gear 85, respectively. The ratchet cover 89 is located outside the pawl 87 and is engaged with the outer casing 1. When the ratchet cover 89 is engaged with the outer casing 1, it covers the ratchet 86. When the trigger 22 is pulled, the first rotating frame moves towards the driven wheel 83. The first rotating frame drives the spur gear 85 to rotate counterclockwise through preset teeth. When the spur gear 85 rotates counterclockwise, it drives the pawl 87 to rotate counterclockwise as well. Since the pawl 87 meshes with the ratchet 86 and the ratchet 86 is connected to the driving wheel 82, the counterclockwise rotation of the spur gear 85 and the pawl 87 simultaneously drives the ratchet 86 and the driving wheel 82 to rotate counterclockwise. The driving wheel 82 meshes with the driven wheel 83, so when the driving wheel 82 rotates, it drives the driven wheel 83 and the internal gear 84 to rotate counterclockwise. When trigger 22 is released, the teeth on the first pusher 51 drive the spur gear 85 to rotate clockwise. This clockwise rotation of the spur gear 85 simultaneously drives the pawl 87 to rotate clockwise as well. Because the spur gear 85 rotates clockwise, the pawl 87 does not drive the ratchet 86 to rotate clockwise. Therefore, the spur gear 85 only idles during clockwise rotation and does not drive the ratchet 86 or the drive wheel 82 to rotate clockwise. This prevents the driven wheel 83 and the internal gear 84 from rotating clockwise when trigger 22 is released.

[0023] like Figure 21-24 As shown, the elastic cord pusher assembly 6 includes a second pusher 61, a pusher block 62, a shuttle-shaped slider 63, a stop bar 64, a second reset rod 65, a second reset spring 66, and an elastic cord pusher rod 67. The second pusher 61 is disposed on one side of the air guide cylinder 23. The second pusher 61 is located inside the first pusher 51. The pusher block 62 is positioned between the air guide cylinder 23 and the second pusher 61, and its sidewall abuts against the air guide cylinder 23. The shuttle-shaped slider 63 is disposed on the other side of the pusher block 62 and hinged to its sidewall. The shuttle-shaped slider 63 is positioned in a pre-set groove in the second pusher 61, and the second pusher 61 has an upper groove and a lower groove at the position of the shuttle-shaped slider 63. A stop lever 64 is connected to the side wall of the shuttle-shaped slider 63 on one side of the shift knob assembly 7. One end of the stop lever 64 is bonded to the side wall of the shuttle-shaped slider 63, and the other end of the stop lever 64 is set in the pre-set guide groove 75 of the shift gate 72 of the shift knob assembly 7. A second reset lever 65 is set at one end of the second push frame 61 located on the guide plate 55, and the second reset lever 65 is slidably connected to the guide plate 55. One end of the second reset lever 65 located on the second push frame 61 is bonded to the second push frame 61. A second reset spring 66 is sleeved on the second reset lever 65, and the second reset spring 66 and the second push frame 61 are respectively set on both sides of the guide plate 55. The two ends of the second reset spring 66 abut against the second reset lever 65 and the guide plate 55 respectively. A spring-loaded push rod 67 is set at the other end of the second push frame 61, and the spring-loaded push rod 67 is located below the driven wheel 83. The first push frame 51 and the baffle 53 both have through holes at the positions corresponding to the spring-loaded push rod 67. The elastic cord push rod 67 passes through the pre-set through holes in the first push frame 51 and the baffle 53. The push block 62 is located at one end of the trigger 22 and abuts against the trigger 22. Therefore, when the trigger 22 is pulled, the trigger 22 will move towards the gear assembly 8 via the push block 62. At this time, if the shuttle-shaped slider 63 is located in the pre-set upper sliding groove of the second push frame 61, the push block 62 will not drive the second push frame 61 to move when it moves under the action of the trigger 22. However, if the shuttle-shaped slider 63 is located in the pre-set lower sliding groove of the second push frame 61, the push block 62 will drive the second push frame 61 to move synchronously when it moves under the action of the trigger 22.

[0024] like Figure 25-26As shown, the shift knob assembly 7 includes a knob 71, a shift gate 72, a third spring 73, a fixing pin 74, and a guide groove 75. The knob 71 is disposed on the outside of the housing 1, and the housing 1 has a circular opening at the position of the knob 71. The knob 71 is rotatably connected to the housing 1. The shift gate 72 is located on one side of the second push frame 61 and above the first push frame 51. The housing 21 has a square slot at the position of the shift gate 72, and the shift gate 72 is slidably connected in the square slot of the housing 21. The knob 71 has a fixing pin 74 on one side of the shift gate 72, and the shift gate 72 has a guide groove 75 at the position of the fixing pin 74. One end of the fixing pin 74 is bonded to the side wall of the knob 71, and the other end of the fixing pin 74 is disposed in the guide groove 75 of the fixing pin 74. The shift gate 72 also has a guide groove 75 at the position of the stop lever 64. The stop lever 64 is set in the pre-set guide groove 75 of the shift gate 72. The third spring 73 is vertically set below the shift gate 72, and the upper end of the third spring 73 abuts against the shift gate 72. The lower end of the third spring 73 abuts against the housing 21. Therefore, when the knob 71 is rotated counterclockwise, the fixing pin 74 on the knob 71 will drive the shift gate 72 to move upward. When the shift gate 72 moves upward, it will drive the shuttle-shaped slider 63 to rotate upward through the stop lever 64. At this time, the shuttle-shaped slider 63 will be located in the upper sliding groove of the second push frame 61. When the knob 71 is rotated clockwise, the fixing pin 74 on the knob 71 will drive the shift gate 72 to move downward. When the shift gate 72 moves downward, it will drive the shuttle-shaped slider 63 to rotate downward through the stop lever 64. At this time, the shuttle-shaped slider 63 will be located in the lower sliding groove of the second push frame 61.

[0025] like Figure 27-31As shown, the pre-installed device 4 includes a fixing block 411, a first buckle 412, an outer sleeve 413, an elastic cord driven rod 414, an inner sleeve 415, a binding pin 416, a transmission gear 417, an elastic cord tube 418, and a wire block 419. There are two first buckles 412, symmetrically arranged around the axis of the outer sleeve 413. Both first buckles 412 are made of elastic plastic, with one end of each buckle adhered to the fixing block 411, and the other end of each buckle having an inclined surface. The fixing block 411 is located at one end of the outer sleeve 413, and the outer sleeve 413 is adhered to the inner wall of the fixing block 411. There are two elastic cord driven rods 414, both connected to the outer sleeve 413, and the two elastic cord driven rods 414 are respectively located on both sides of the transmission gear 417. The inner sleeve 415 is slidably disposed inside the outer sleeve 413. A binding pin 416 is disposed at one end of the inner sleeve 415 located on the fixing block 411, and is also disposed inside the fixing block 411. A transmission gear 417 is disposed on one side of the binding pin 416 and outside the fixing block 411, with the binding pin 416 adhered to the transmission gear 417. The transmission gear 417 is sleeved on the end of the inner sleeve 415 and rotatably connected to it. An elastic cord tube 418 is disposed below the outer sleeve 413 and is slidably connected to it. A wire block 419 is located below the outer sleeve 413 and adhered to it. The elastic cord tube 418 is slidably connected to the inside of the wire block 419 at one end, and a sharp chamfer is provided at one end of the elastic cord tube 418. An elastic cord 9 is also provided inside the elastic cord tube 418. One end of the elastic cord 9 is tied to the binding pin 416, and the other end of the elastic cord 9 passes through the wire block 419 and is tied to the inner sleeve 415. The transmission gear 417 is inserted into the inside of the outer casing 1 until the first latch 412 and the latch block 14 are locked together. The transmission gear 417 will then insert into the inside of the inner gear 84 and mesh with it. Simultaneously, the end of the elastic cord tube 418 located on the transmission gear 417 will abut against the elastic cord push rod 67. At this point, turn knob 71 counterclockwise to position the shuttle-shaped slider 63 in the upper groove of the second pusher 61. Then, pull trigger 22. At this time, the rubber ring pusher 52 is pushed out, while the elastic cord pusher 67 is not pushed out. When the internal gear 84 rotates, it will drive the transmission gear 417 and the binding pin 416 to rotate, thereby tightening the elastic cord 9. Under the action of the rubber ring pusher 52, the outer sleeve 413 will move forward synchronously, thereby pushing the elastic cord 9, which is located above and below the wire block 419 and tied to the inner sleeve 415, off the inner sleeve 415. The elastic cord 9 pushed off the inner sleeve 415 will then be tied to the hemorrhoid that is attracted to the inner sleeve 415.Then, release trigger 22 to reset it. Next, turn knob 71 clockwise to position the shuttle-shaped slider 63 in the lower groove of the second pusher 61. Then pull trigger 22 again, at which point the rubber ring push rod 52 is extended. The elastic cord push rod 67 is also extended, driving the elastic cord tube 418 to move synchronously towards the guide block 419. As the elastic cord tube 418 moves towards the guide block 419, it can cut the elastic cord 9 by forming a sharp chamfer. Then, when the two release buttons 15 are simultaneously pressed into the interior of the outer casing 1, the two first latches 412 are pressed out from the latch block 14, and the first latches 412 can then be removed from the interior of the outer casing 1.

[0026] The movement process of this embodiment is as follows: During use, the knob 71 can be rotated clockwise. When the knob 71 is rotated clockwise, the shuttle-shaped slider 63 is moved into the upper sliding groove of the second sliding frame through the shifting grid 72. Then, the end of the front device 4 with the first buckle 412 can be inserted into the inside of the outer shell 1 until the first buckle 412 engages with the locking block 14. When the first buckle 412 is inserted into the inside of the outer shell 1, it is necessary to ensure that the internal gear 84 and the transmission gear 417 are engaged. After the internal gear 84 and the transmission gear 417 are engaged, the end of the air guide cylinder 23 located at the internal gear 84 will be inserted into the inner sleeve 415 located at the end of the transmission gear 417. Then, the outer shell 1 can be held and the end of the inner sleeve 415 of the front device 4 can be aligned with the patient's hemorrhoids. Then, the air pump 35 can be turned on by the power switch 32. After the air pump 35 is turned on, it will draw out the air inside the inner sleeve 415, thereby creating a negative pressure inside the inner sleeve 415. The negative pressure inside the inner sleeve 415 then draws the hemorrhoid into the inner sleeve 415. Pulling the trigger 22 causes the first sliding frame to move forward, which in turn drives the inner gear 84 to rotate via the spur gear 85. The rotation of the inner gear 84 drives the binding pin 416 and the transmission gear 417 to rotate. The binding pin 416, in turn, winds up the elastic cord 9. Simultaneously, the first pusher 51, moving forward, drives the outer sleeve 413 forward via the elastic cord driven rod 414. As the outer sleeve 413 moves forward, it pushes the elastic cord 9, which is attached to the end of the inner sleeve 415, off the inner sleeve 415. Since the elastic cord 9 is already circular when attached to the inner sleeve 415, it directly attaches to the hemorrhoid drawn into the inner sleeve 415 when pushed off. As the first pusher 51 continues to move forward, the internal gear 84, transmission gear 417, and binding pin 416 will continue to rotate, thus continuously tightening the elastic cord 9 attached to the hemorrhoid. After releasing the trigger 22, the knob 71 can be turned counterclockwise. When the knob 71 rotates counterclockwise, it will move the binding pin 416 downwards into the sliding groove of the second pusher 61 via the shift gate 72, and then the trigger 22 can be pulled again. Simultaneously, the trigger 22 will drive the second pusher 61 forward synchronously via the push block 62 and the shuttle-shaped slider 63. As the second pusher 61 moves forward, it will drive the elastic cord tube 418 forward synchronously via the elastic cord push rod 67. When the elastic cord tube 418 moves forward, the end of the elastic cord tube 418 located at the conductor block 419 will move into the interior of the conductor block 419. At this time, the end of the elastic cord tube 418 located at the conductor block 419 adopts a sharp structure formed by a chamfering process, which will cut the taut elastic cord 9.Then press the pressure relief button 33. After pressing the pressure relief button 33, external air will enter the inside of the guide tube 37 and the inner sleeve 415. At this time, the negative pressure environment inside the inner sleeve 415 will be released. Then you can hold the outer shell 1 and remove the pre-device 4 from the patient's hemorrhoids. Then you can press the release button 15 to remove the pre-device 4 from the outer shell 1. Example 2

[0027] like Figure 32-39 As shown, the pre-mounted device 4 includes a second latch 421, an outer sleeve 422, rubber rings 423, an inner sleeve 424, a third return spring 425, and a pressure plate 426. The second latch 421 is located at one end of the outer sleeve 413 and is fitted onto the outer sleeve 422. There are four rubber rings 423, each fitted onto the other end of the outer sleeve 422, and the four rubber rings 423 are arranged in a row. The outer sleeve 422 has multiple inclined surfaces at one end of the rubber rings 423, and each rubber ring 423 is fitted onto a single inclined surface. The inner sleeve 424 is slidably disposed inside the outer sleeve 422. The pressure plate 426 is fitted onto the end of the inner sleeve 424 located at the latch and is adhered to the outer wall of the outer sleeve 422. The third return spring 425 is positioned between the pressure plate 426 and the second latch 421. The third return spring 425 is sleeved on the pressure plate 426. Both ends of the third return spring 425 abut against the pressure plate 426 and the second latch 421, respectively. When the trigger 22 is pulled, the first pusher 51 drives the pressure plate 426 and the outer sleeve 422 forward via the rubber ring pusher 52. As the pressure plate 426 moves the outer sleeve 422 forward, it compresses the third return spring 425, causing it to elastically deform. Then, when the trigger 22 is released, the third return spring 425 springs the pressure plate 426 back to its original position, thus helping the pressure plate 426 to reset. One end of the outer sleeve 422 is inserted into a pre-set groove in the inner sleeve 424, and the inner sleeve 424 abuts against the rubber ring 423. Therefore, after inserting the second latch 421 into the interior of the outer casing 1 until the second latch 421 and the latch block 14 are locked together, the trigger 22 can be pulled. Subsequently, the first pusher 51 and the rubber ring pusher 52 will move outward synchronously. When the rubber ring pusher 52 moves outward, it will push the pressure plate 426 and the outer sleeve 422 outward synchronously. When the outer sleeve 422 moves outward, it will move the four rubber rings 423 outward synchronously. At this time, the outermost rubber ring 423 will detach from the inner sleeve 424 and wrap around the hemorrhoid that is adsorbed in the inner sleeve 424. Then, the rubber rings located on the side of the pressure plate 426 will move forward in sequence under the push of the outer sleeve 422.

[0028] The operation process of this embodiment is as follows: During use, insert the end of the front-mounted device 4 with the second latch 421 into the interior of the outer casing 1 until the second latch 421 engages with the locking block 14. After the second latch 421 engages with the locking block 14, the end of the air guide cylinder 23 located at the internal gear 84 will be inserted into the interior of the inner sleeve 424 located at the pressure plate 426. Then, hold the outer casing 1 and align the end of the inner sleeve 424 with the rubber ring 423 with the patient's hemorrhoids. Then, turn on the air pump 35 via the power switch 32. After turning on, the air pump 35 will extract the air from inside the inner sleeve 424, creating a negative pressure inside the inner sleeve 424. This negative pressure will then draw the hemorrhoids into the inner sleeve 424. Then, pulling the trigger 22 causes the first sliding frame to move forward. As the first sliding frame moves forward, it drives the pressure plate 426 forward synchronously via the rubber ring push rod 52. The pressure plate 426, in turn, drives the outer sleeve 422 forward. The outer sleeve 422 is located at one end of the rubber ring 423 and abuts against the four rubber rings 423. The inner sleeve 424 has an inclined surface at the position of the rubber rings 423, and the inclined surface faces towards the end of the outer sleeve 422 (i.e., the suction port direction of the inner sleeve 424). Therefore, as the outer sleeve 422 moves forward, it drives the four rubber rings 423 forward synchronously. At this time, the outermost rubber ring 423 located at the inner sleeve 424 is pushed off the inner sleeve 424 by the outer sleeve 422. The rubber ring 423 itself is elastic. Therefore, after the outermost rubber ring 423 of the inner sleeve 424 is pushed down by the outer sleeve 422, it will wrap around the hemorrhoid with its own elasticity. Then, the pressure relief button 33 can be pressed. After pressing the pressure relief button 33, external air will enter the drainage tube 37 and the inner sleeve 415. At this time, the negative pressure environment inside the inner sleeve 424 will be released. Then, the pre-positioned device 4 can be removed from the patient's hemorrhoid by holding the outer shell 1. Then, the release button 15 can be pressed to remove the pre-positioned device 4 from the outer shell 1.

[0029] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. An electric bandaging device, characterized in that: It includes a housing (1), a drive device (2), a negative pressure device (3) and a pre-mount device (4). The drive device (2) is located inside the housing (1) and above the negative pressure device (3). The negative pressure device (3) is located inside the housing (1). The pre-mount device (4) is located at the front end of the housing (1) and outside the housing (1). One end of the pre-mount device (4) is snapped onto the housing (1) and connected to the drive device (2).

2. The electric banding device according to claim 1, characterized in that: The drive device (2) includes a housing (21), a trigger (22), a rubber ring pusher assembly (5), an elastic cord pusher assembly (6), a shift knob assembly (7), a gear assembly (8), and an air cylinder (23). The housing (21) is connected to the inside of the outer shell (1). The air cylinder (23) is located inside the housing (21). The trigger (22) is located at one end of the air cylinder (23) and below it. The trigger (22) is hinged to the housing (21) and abuts against the rubber ring pusher assembly (5) and the elastic cord pusher assembly (6). The rubber ring pusher assembly (5) is located below the guide cylinder and is connected to the gear assembly (8). The elastic wire pusher assembly (6) is located below the air guide cylinder (23) and is located inside the rubber ring pusher assembly (5). The rubber ring pusher assembly (5) is connected to the elastic wire pusher assembly (6). The gear assembly (8) is located at the other end of the guide cylinder and is located above the elastic wire pusher assembly (6). The shift knob assembly (7) is located above the rubber ring pusher assembly (5) and is connected to the elastic wire pusher assembly (6).

3. The electric banding device according to claim 2, characterized in that: The rubber ring pusher assembly (5) includes a first pusher (51), a rubber ring pusher rod (52), a baffle (53), a first reset rod (54), a guide plate (55), and a first reset spring (56). The first pusher (51) is located below the air cylinder (23), and one end of the first pusher (51) abuts against the trigger (22). The other end of the first pusher (51) is connected to the gear assembly (8). There are two rubber ring pushers (52), both of which are located at one end of the first pusher (51) on the gear assembly (8). The two rubber ring pushers (52) are symmetrically arranged with the air cylinder (23) as the center. Both rubber ring pushers (52) are connected to the first pusher. On the frame (51), the baffle (53) is set at the end of the air guide cylinder (23) and connected to the box (21). Two rubber ring push rods (52) are slidably connected to the baffle (53). The first reset rod (54) is set at one end of the first push frame (51) located on the trigger (22), and the first reset rod (54) is connected to the guide plate (55). The guide plate (55) is set above the first reset rod (54) and connected to the box (21). The first reset spring (56) is set on one side of the guide plate (55) and sleeved on the first reset rod (54). The two ends of the first reset spring (56) respectively abut against the first reset rod (54) and the guide plate (55).

4. The electric banding device according to claim 3, characterized in that: The gear assembly (8) includes a gear carrier (81), a driving wheel (82), a driven wheel (83), an internal gear (84), a spur gear (85), a ratchet (86), a pawl (87), a torsion spring (88), and a ratchet chamber cover (89). The gear carrier (81) is fitted onto the air guide cylinder (23). The driven wheel (83) is fitted onto one end of the air guide cylinder (23) and slidably connected to the first push frame (51). The internal gear (84) is located at one end of the driven wheel (83) and connected to the driven wheel (83), and the internal gear (84) is connected inside the baffle (53). The driving wheel (82) is located on one side of the gear carrier (81) and connected to the gear carrier (81), and the driving wheel (82) and the driven wheel (83) mesh with each other. The ratchet (86) is provided with The spur gear (85) is located at the end of the drive wheel (82) and connected to the drive wheel (82). The spur gear (85) is located in the middle position between the ratchet (86) and the drive wheel (82), and the spur gear (85) is located above the first push frame (51). The spur gear (85) is rotatably connected to the drive wheel (82) and meshes with the preset teeth on the first push frame (51). There are two ratchet teeth, which are respectively located above and below the ratchet (86). Both ratchet teeth are connected to the spur gear (85), and both ratchet teeth mesh with the ratchet (86). A torsion spring (88) is provided on one side of each ratchet tooth. The two ends of the torsion spring (88) are respectively connected to the ratchet tooth and the spur gear (85). The ratchet chamber cover (89) is located outside the ratchet tooth and is snapped onto the outer shell (1).

5. The electric banding device according to claim 2, characterized in that: The elastic wire pusher assembly (6) includes a second pusher (61), a push block (62), a shuttle-shaped slider (63), a stop bar (64), a second reset rod (65), a second reset spring (66), and an elastic wire pusher (67). The second pusher (61) is located on one side of the air guide cylinder (23), and the push block (62) is located in the middle of the air guide cylinder (23) and the second pusher (61). The push block (62) is located on one side of the air guide cylinder (23) and abuts against the air guide cylinder (23). The shuttle-shaped slider (63) is located on one side of the push block (62) and is hinged to the push block (62). The shuttle-shaped slider (63) is located on the second pusher (61) and the second pusher (62) is also located on the second pusher (64). 1) In the preset slide groove, the stop bar (64) is connected to the side wall of the shuttle-shaped slider (63), and the stop bar (64) is set inside the shift knob assembly (7). The second reset bar (65) is set at one end of the second push frame (61) and slidably connected to the guide plate (55). The second reset spring (66) is sleeved on the second reset bar (65), and the two ends of the second reset spring (66) respectively abut against the guide plate (55) and the second reset bar (65). The elastic line push rod (67) is connected to the other end of the second push frame (61), and one end of the elastic line push rod (67) passes through the first push frame (51) and slidably connected to the baffle (53).

6. The electric ligator according to claim 5, characterized in that: The shift knob assembly (7) includes a knob (71), a shift gate (72), a third spring (73), a fixing pin (74), and a guide groove (75). The knob (71) is located outside the housing and connected to the housing. The shift gate (72) is located on one side of the second push frame and above the first push frame. The fixing pin (74) is connected to the side wall of the knob (71). The shift gate (72) is connected to the knob (71) through the fixing pin (74). The shift gate (72) has guide grooves (75) at the positions corresponding to the shift lever (64) and the fixing pin (74). The third spring (73) is vertically arranged below the shift gate (72).

7. The electric banding device according to claim 1, characterized in that: The negative pressure device (3) includes a fixed plate (31), a power switch (32), a pressure relief button (33), a battery (34), an air pump (35), an indicator light (36), and a guide pipe (37). The fixed plate (31) is vertically connected to the inside of the outer casing (1). The power switch (32) and the pressure relief button (33) are both connected to the fixed plate (31). There are multiple indicator lights (36) arranged vertically, and the indicator lights (36) are located on one side of the pressure relief button (33). The outer casing (1) contains the power switch (32) and the pressure relief button (33). The positions of the indicator light (36) and the guide tube (37) are all provided with slots. The guide tube (37) is located inside the outer shell (1) and on one side of the fixing plate (31). The two ends of the guide tube (37) are connected to the air cylinder (23) and the air pump (35) respectively. The pressure relief button (33) is connected to the guide tube (37). The air pump (35) is located below the guide tube (37) and is electrically connected to the battery (34). The battery (34) is located below the air pump (35) and is electrically connected to the air pump (35). The battery (34) is also electrically connected to the indicator light (36).

8. The electric ligator according to claim 7, characterized in that: The outer casing (1) consists of a left casing (11), a right casing (12) and a battery compartment (13). The inner walls of the left casing (11) and the right casing (12) are provided with a locking block (14) for locking the front device (4) and a release button (15) for disconnecting the connection between the front device (4) and the outer casing (1).

9. The electric banding device according to claim 8, characterized in that: The pre-installed device (4) includes a fixing block (411), a first buckle (412), an outer sleeve (413), an elastic cord driven rod (414), an inner sleeve (415), a binding pin (416), a transmission gear (417), an elastic cord tube (418), and a wire block (419). There are two first buckles (412) respectively located on both sides of the fixing block (411). The fixing block (411) is located at one end of the outer sleeve (413) and connected to it. There are two elastic cord driven rods (414) both connected to the outer sleeve (413). The inner sleeve (415) is slidably mounted on the outer sleeve (413). Inside, a binding pin (416) is set at one end of the inner sleeve (415) and inside the fixing block (411), and the binding pin (416) is connected to the transmission gear (417). The transmission gear (417) is set outside the fixing block (411) and rotatably connected to the inner sleeve (415). The elastic cord tube (418) is set below the outer sleeve (413). The conductor block (419) is located below the outer sleeve (413) and connected to the outer sleeve (413). One end of the elastic cord tube (418) is slidably set inside the conductor block (419). An elastic cord (9) is provided inside the elastic cord tube (418).

10. An electric ligator according to claim 8, characterized in that: The pre-mounted device (4) includes a second buckle (421), an outer tube (422), rubber rings (423), an inner tube (424), a third reset spring (425), and a pressure plate (426). The second buckle (421) is located at one end of the outer tube (422) and connected to the outer tube (422). There are four rubber rings (423), all of which are sleeved on the other end of the outer tube (422). The inner tube (424) is located inside the outer tube (422). The pressure plate (426) is connected to the inner sleeve (424) at one end of the buckle. The third return spring (425) is sleeved on the inner sleeve (424), and the two ends of the third return spring (425) abut against the pressure plate (426) and the second buckle (421) respectively. The outer sleeve (422) is inserted into the groove of the inner sleeve (424) at one end of the rubber ring (423), and the inner sleeve (424) abuts against the rubber ring (423).

Images