Knot tying device and vessel ligator

Abstract

The application discloses a knotting device and a blood vessel ligator. The knotting device comprises a gun body provided with a knotting groove and a knotting mechanism arranged in the knotting groove. The knotting mechanism comprises a spiral spring and an abutting piece abutting against the spring body of the spiral spring. The spiral spring has a hooking and pulling end and an extending end. The extending end is used for controlling the movement of the spring body of the spiral spring. The abutting piece is used for making the spring body of the spiral spring deform and stretch in the movement, so that the spring body of the spiral spring rotates. In the process of the rotation of the spring body of the spiral spring, the thread of the surgical suture hooked by the hooking and pulling end rotates around the surgical suture passing through the spring body of the spiral spring, so that the surgical suture forms a surgical knot. The blood vessel ligator comprises the knotting device. In the blood vessel ligator, the surgical suture can quickly form the surgical knot and the blood vessel can be tightly clamped by only operating the traction piece to pull the extending end of the spiral spring.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a knotting device and a vascular ligator. Background Technology

[0002] In traditional clinical surgery, to save costs, the most common method of hemostasis is still manual ligation of blood vessels using surgical sutures / medical sutures. Currently, although ligation devices exist to replace manual ligation, these devices use a knotting mechanism to form a surgical knot with the surgical sutures / medical sutures, which is then used to ligate the blood vessel. However, the knotting mechanism of such ligation devices is relatively complex and cannot quickly knot the surgical sutures. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a knotting device and a vascular ligator, which can solve the problem that traditional knotting mechanisms cannot quickly knot surgical sutures.

[0004] According to a first aspect of the present invention, a knotting device includes: a gun body having a knotting groove; and a knotting mechanism disposed within the knotting groove. The knotting mechanism includes a helical spring and a contact member abutting against the spring body of the helical spring. The helical spring has a hook end and an extension end arranged sequentially along a first direction. The extension end is used to be pulled to move the spring body of the helical spring. The contact member is used to cause the moving spring body of the helical spring to be deformed by the contact member and extend, so that the spring body of the helical spring rotates. During the rotation of the spring body of the helical spring, the end of the surgical suture hooked by the hook end rotates around the thread of the surgical suture passing through the spring body of the helical spring as the spring body rotates, so that the surgical suture forms a surgical knot.

[0005] The fastening device according to embodiments of the present invention has at least the following technical effects:

[0006] When using the above-mentioned knotting device to knot the surgical suture, first, move the end of the surgical suture along the first direction through the body of the helical spring. This allows the suture thread to pass through the helical spring along the first direction. Then, continue moving the suture end through the helical spring around the blood vessel, hooking it with the hook end of the helical spring. This allows the suture thread to be wrapped around the outside of the blood vessel. Next, pull the extension end, causing the helical spring to deform and extend under the contact of the abutment. This causes the helical spring to rotate, and the suture end hooked by the hook end of the helical spring rotates around the suture thread passing through the helical spring, thus forming a surgical knot for ligating the blood vessel. In this way, simply pulling the extension end of the helical spring allows the surgical suture to quickly form a knot.

[0007] According to some embodiments of the present invention, the abutting member includes an abutting ring with an abutting groove, the extended end passing through the abutting groove, and the spring body of the helical spring abutting against the abutting ring.

[0008] According to some embodiments of the present invention, the groove wall of the buckle groove is provided with a tension groove; the buckle mechanism further includes a traction member slidably disposed in the tension groove, one end of the traction member is connected to the extension end, and the other end of the traction member is used to be pulled to drive the extension end to pull the spring body of the helical spring to move.

[0009] According to some embodiments of the present invention, the fastening device further includes a traction mechanism connected to the gun body, the traction mechanism being used to controllably pull the thread end to move along the first direction through the spring body of the helical spring, and the traction mechanism being used to controllably pull the thread end passing through the spring body of the helical spring to move from outside the spring body of the helical spring to hook with the hook end.

[0010] According to some embodiments of the present invention, the gun body is provided with a sliding groove that passes through the knot groove; the traction mechanism includes a pushing assembly disposed in the sliding groove and a hook assembly connected to the gun body, and the pushing assembly is movable along the first direction; wherein, the pushing assembly is used to controllably push the suture end through the spring body of the helical spring along the first direction; the hook assembly is used to controllably hook the suture thread passing through the spring body of the helical spring to surround the blood vessel, and the hook assembly is also used to controllably hook the suture end from outside the spring body of the helical spring to hook it with the hooking end of the helical spring.

[0011] According to some embodiments of the present invention, the gun body is further provided with a guide groove, and the end face of the gun body is provided with an outlet communicating with the guide groove, and the sliding groove is also communicating with the outlet; the hook assembly includes a hook member slidably disposed in the guide groove and a guide hook connected to the gun body, and the hook member can be controlled to extend out from the outlet; wherein, the guide hook is used to guide the hook member extending from the outlet to hook onto the outside of the blood vessel, and to hook the hook member to hook the end of the thread passing through the spring body of the helical spring.

[0012] According to some embodiments of the present invention, the guide hook is rotatably connected to the gun body, and the traction mechanism further includes a transmission component that is tractively connected to the guide hook, the transmission component being used to controllably rotate the guide hook relative to the gun body.

[0013] According to some embodiments of the present invention, the push assembly includes a sliding rod slidably connected to the wall of the sliding groove, and a push rod with one end connected to the sliding rod, wherein the other end of the push rod is provided with a push portion for pushing the end of the surgical suture.

[0014] A vascular ligator according to a second aspect of the present invention includes the above-described knotting device.

[0015] The vascular ligator according to embodiments of the present invention has at least the following technical effects:

[0016] When using the aforementioned vascular ligator to ligate blood vessels, first, move the end of the surgical suture along the first direction through the body of the helical spring. Then, continue moving the end of the surgical suture through the helical spring around the blood vessel, hooking it with the hook end of the helical spring. This allows the suture to be wrapped around the outside of the blood vessel. Next, pull the extension end, causing the helical spring to deform and extend under the contact of the abutment, thus rotating the helical spring. This causes the end of the surgical suture hooked by the hook end to rotate around the suture thread passing through the helical spring, forming a surgical knot for ligating the blood vessel. Then, continue pulling the extension end of the helical spring with the traction device, tightening the surgical knot and securing the blood vessel. Finally, use a scalpel to cut off any excess surgical suture, completing the ligation. In this way, by simply operating the traction device to pull the extended end of the spiral spring, the surgical suture can quickly form a surgical knot and tighten the blood vessel. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a partial structural diagram of a fastening device according to an embodiment of the present invention. Figure 1 ;

[0019] Figure 2 This is a partial structural diagram of a fastening device according to an embodiment of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the structure of a helical spring and an abutting member according to an embodiment of the present invention;

[0021] Figure 4 This is a simplified structural diagram of a fastening device according to an embodiment of the present invention. Figure 1 ;

[0022] Figure 5 yes Figure 4 A magnified view of part A in the figure shown;

[0023] Figure 6 This is a simplified structural diagram of a fastening device according to an embodiment of the present invention. Figure 2 ;

[0024] Figure 7 This is a simplified structural diagram of a fastening device according to an embodiment of the present invention. Figure 3 .

[0025] Figure label:

[0026] 100. Gun body; 110. Clearance groove; 111. Exit; 112. Guide groove; 120. Connecting groove; 130. Sliding groove; 140. Tensioning groove; 150. Connecting part;

[0027] 200. Fastening mechanism; 210. Helical spring; 211. Spring body; 212. Extension end; 213. Hook end; 220. Abutment part; 221. Abutment ring; 2211. Abutment groove; 230. Traction part;

[0028] 300. Traction mechanism; 310. Pushing assembly; 311. Pushing rod; 3111. Pushing part; 312. Sliding rod; 320. Hook assembly; 321. Hook component; 3211. Magnetic suction part; 322. Guide hook; 330. Transmission assembly; 331. First transmission component; 332. Second transmission component;

[0029] 400. Surgical suture; 410. Thread end; 411. Connecting part; 420. Silk thread;

[0030] 500. Blood vessels. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] like Figure 1 , Figure 3 as well as Figure 5 As shown, one embodiment relates to a fastening device, which includes a gun body 100 and a fastening mechanism 200.

[0035] The gun body 100 is provided with a fastening groove 120, and a fastening mechanism 200 is disposed in the fastening groove 120. The fastening mechanism 200 includes a coil spring 210 and a contact member 220 that abuts against the spring body 211 of the coil spring 210. The coil spring 210 has a hook end 213 and an extension end 212 arranged sequentially along a first direction. The extension end 212 is used to controllably pull the spring body 211 of the coil spring 210 to move, and the contact member 220 is used to actuate the moving spring body 211. The spring body 211 of the helical spring 210 is deformed and extended to make the spring body 211 of the helical spring 210 rotate; during the rotation of the spring body 211 of the helical spring 210, the thread end 410 of the surgical suture 400 hooked by the hook end 213 rotates around the thread 420 of the surgical suture 400 passing through the spring body 211 of the helical spring 210 as the spring body 211 of the helical spring 210 rotates, so that the surgical suture 400 forms a surgical knot.

[0036] When using the above-mentioned knotting device to knot the surgical suture 400, firstly, operate the end 410 of the surgical suture 400 to move along the first direction and pass through the spring body 211 of the spiral spring 210, so that the thread 420 of the surgical suture 400 passes through the spring body 211 of the spiral spring 210 along the first direction with the end 410. Then, continue to operate the end 410 of the surgical suture 400, which has passed through the spring body 211 of the spiral spring 210, to move around the blood vessel 500, and make the end 410 hook with the hook end 213 of the spiral spring 210, so that the thread 420 of the surgical suture 400 passes through the spring body 211 of the spiral spring 210 along the first direction. The suture end 410 is wrapped around the outside of the blood vessel 500. Then, pulling the extension end 212 causes the spring body 211 of the spiral spring 210 to deform and extend under the contact of the abutment member 220. This causes the spring body 211 of the spiral spring 210 to rotate, and consequently, the suture end 410 of the surgical suture 400, which is hooked by the hook end 213 of the spiral spring 210, rotates around the thread 420 of the surgical suture 400 that passes through the spring body 211 of the spiral spring 210. In this way, the surgical suture 400 can form a surgical knot for ligating the blood vessel 500. Thus, by simply pulling the extension end 212 of the spiral spring 210, the surgical suture 400 can quickly form a surgical knot.

[0037] In this context, the spring body 211 of the aforementioned helical spring 210 refers to the portion of the helical spring 210 that has a helical structure. Furthermore, the helical spring 210 can be, but is not limited to, a cylindrical helical spring.

[0038] Furthermore, the aforementioned first direction is parallel to the axial direction of the spring body 211 of the coil spring 210, and specifically... Figure 1 In the middle, the first direction is in the same direction as the positive direction of the X-axis.

[0039] Meanwhile, the number of surgical knots in the surgical line 400 is directly proportional to the number of coils in the spring body 211 of the helical spring 210.

[0040] Specifically, the surgical suture 400 includes a suture end 410, a thread 420 connected to the suture end 410 at one end, and soft fibers covering the surface of the suture end 410. The surface of the hook end 213 of the spiral spring 210 is provided with hooked bristles, which cooperate with the fibers on the suture end 410 to form a hook-and-loop structure that can be interlocked. In this way, by the interlocking of the bristles and the fibers, the hook end 213 of the spiral spring 210 can hook onto the suture end 410 of the surgical suture 400.

[0041] It should be noted that the hook and loop structure formed by the combination of the bristles and fibers is existing technology, such as the hook and loop structure of the male and female buckles in Velcro. There are no special limitations on this, as long as it can achieve the function of hooking the end 410 of the surgical suture 400 with the hook end 213 of the spiral spring 210.

[0042] like Figure 3 As shown, specifically, the abutting member 220 includes an abutting ring 221 with an abutting groove 2211, an extension end 212 passing through the abutting groove 2211, and the spring body 211 of the helical spring 210 abutting against the abutting ring 221. Specifically, in this embodiment, the abutting ring 221 is fixedly connected to the groove wall of the fastening groove 120. When the extension end 212 pulls the spring body 211 of the helical spring 210 to move along the first direction through the abutting groove 2211, the helical structure of the spring body 211 of the helical spring 210 deforms and extends under the abutment of the abutting ring 221, thereby causing the spring body 211 of the helical spring 210 to rotate. Thus, through the abutting ring 221, the spring body 211 of the helical spring 210 can extend and rotate.

[0043] like Figure 1 As shown, more specifically, the groove wall of the fastening groove 120 is provided with a tension groove 140; the fastening mechanism 200 also includes a traction member 230 slidably disposed within the tension groove 140, one end of the traction member 230 being connected to the extension end 212, and the other end of the traction member 230 being used to be pulled to drive the extension end 212 to pull the spring body 211 of the coil spring 210 to move. Specifically, the extension end 212 passes through the abutment groove 2211 and is connected to one end of the traction member 230. Figure 1When the extension end 212 needs to be pulled, the traction member 230 can be pulled to move along the tension groove 140 in the negative X-axis direction, thereby causing the extension end 212 to pull the spring body 211 of the coil spring 210 to move along the first direction to abut the member 220. Then, the spring body 211 of the coil spring 210 deforms and extends under the abutment action of the member 220, thereby causing the spring body 211 of the coil spring 210 to rotate. And when the traction member 230 continues to be pulled along the tension groove 140 in the negative X-axis direction, so that the spring body 211 of the coil spring 210 is fully deformed and unfolded into the tension groove 140, and the traction member 230 continues to be pulled along the tension groove 140 in the negative X-axis direction, the surgical knot of the surgical suture 400 can be gradually tightened. Thus, by operating the traction member 230, the spring body 211 of the spiral spring 210 can be rotated, thereby causing the surgical suture 400 to form a surgical knot, and at the same time, the surgical knot of the surgical suture 400 can be tightened.

[0044] The aforementioned traction element 230 may be, but is not limited to, a metal wire.

[0045] In addition, the end of the traction member 230 away from the extension end 212 extends out of the gun body 100 from the end of the tension groove 140 away from the fastening groove 120, so that the traction member 230 can be moved manually.

[0046] In some embodiments, the helical spring 210 is made of an elastic material. Specifically, the helical spring 210 is made of a plastic elastic material. When the spring body 211 of the helical spring 210 is fully extended, it can push the traction member 230 to move along the tension groove 140 in the positive direction of the X-axis. During this process, when the hook end 213 of the helical spring 210 retracts from the tension groove 140 into the knot groove 120, the spring body 211 of the helical spring 210 will return to its initial shape under its own elastic force. In this way, the helical spring 210 can be repeatedly used to knot the surgical suture 400.

[0047] The initial state of the spring body 211 of the helical spring 210 refers to the state of the helical spring 210 when it is not subjected to external force.

[0048] like Figure 1As shown, in some embodiments, the fastening device further includes a traction mechanism 300 connected to the gun body 100. The traction mechanism 300 is used to controllably pull the end 410 of the surgical suture 400 along a first direction to pass through the spring body 211 of the helical spring 210. The traction mechanism 300 is also used to controllably pull the end 410 passing through the spring body 211 of the helical spring 210 from outside the spring body 211 of the helical spring 210 to hook with the hook end 213. When it is necessary to pass the thread 420 of the surgical suture 400 through the spring body 211 of the spiral spring 210 and to hook the thread end 410 of the surgical suture 400 with the hook end 213 of the spiral spring 210, the traction mechanism 300 can be operated to pull the thread end 410 of the surgical suture 400 along the first direction to pass through the spring body 211 of the spiral spring 210, so that the thread 420 of the surgical suture 400 passes through the spring body 211 of the spiral spring 210. Then, the traction mechanism 300 is operated to gradually wrap the thread end 410 of the surgical suture 400 around the outside of the blood vessel 500 and to move the thread end 410 from outside the spring body 211 of the spiral spring 210 to hook with the hook end 213 of the spiral spring 210. Thus, by operating the traction mechanism 300, the surgical suture 400 can be easily passed through the spring body 211 of the spiral spring 210, and the end 410 of the surgical suture 400 can be hooked with the hook end 213 of the spiral spring 210.

[0049] like Figure 1 , Figure 4 , Figure 6 as well as Figure 7As shown, specifically, the gun body 100 is provided with a sliding groove 130 that passes through the aforementioned knot groove 120; the traction mechanism 300 includes a push assembly 310 disposed in the sliding groove 130 and a hook assembly 320 connected to the gun body 100, and the push assembly 310 is movable along a first direction; wherein, the push assembly 310 is used to controllably push the thread end 410 through the spring body 211 of the helical spring 210 along the first direction; the hook assembly 320 is used to controllably pull the thread 420 of the surgical suture 400 passing through the spring body 211 of the helical spring 210 so that it is hooked and surrounded outside the blood vessel 500, and the hook assembly 320 is also used to controllably hook the thread end 410 from outside the spring body 211 of the helical spring 210 to hook and fasten with the hook end 213 of the helical spring 210. When it is necessary for the traction mechanism 300 to pull the end 410 of the surgical suture 400 through the spring body 211 of the helical spring 210, the operable push assembly 310 can move along the first direction to push the end 410 of the surgical suture 400, so that the end 410 of the surgical suture 400 is pushed by the push assembly 310 through the spring body 211 of the helical spring 210. When it is necessary for the traction mechanism 300 to pull the end 410 of the surgical suture 400 to hook with the hook end 213 of the spiral spring 210, the hook assembly 320 can be operated to hook the end 410 of the surgical suture 400, which passes through the spring body 211 of the spiral spring 210, and move it around the blood vessel 500. This allows the thread 420 of the surgical suture 400 to be wrapped around the outside of the blood vessel 500. Then, the hook assembly 320 is operated to pull the end 410 of the surgical suture 400 from outside the spring body 211 of the spiral spring 210 until it hooks with the hook end 213 of the spiral spring 210. In this way, through the cooperation of the pushing assembly 310 and the hook assembly 320, the surgical suture 400 can pass through the spring body 211 of the spiral spring 210 and hook the end 410 of the surgical suture 400 with the hook end 213 of the spiral spring 210.

[0050] like Figure 1As shown, specifically, the gun body 100 is also provided with a guide groove 112, and the end face of the gun body 100 is provided with an outlet 111 communicating with the guide groove 112. The sliding groove 130 is also communicating with the outlet 111. The gun body 100 is also provided with a clearance groove 110 that passes through the outlet 111, the guide groove 112, the hook groove 120 and the sliding groove 130. The hook assembly 320 includes a hook member 321 slidably disposed in the guide groove 112 and a guide hook 322 connected to the gun body 100. The hook member 321 can extend out from the outlet 111. The guide hook 322 is used to guide the hook member 321 extending out from the outlet 111 to hook around the blood vessel 500 and to hook the hook member 321 to hook the end 410 of the spring body 211 of the coil spring 210. When ligation of blood vessel 500 is required, first operate the pushing component 310 to push the end 410 of surgical suture 400 through the spring body 211 of helical spring 210, and push the end 410 of surgical suture 400 to the outlet 111, so that the thread 420 of surgical suture 400 passes through the spring body 211 of helical spring 210. Then operate the guide hook 322 to hook around blood vessel 500, and then operate the pull hook 321 to move along the guide groove 112 towards the first The direction of movement causes the hook 321 to extend from the outlet 111. Guided by the guide hook 322, the hook 321 hooks around the blood vessel 500 and engages with the suture end 410 at the outlet 111. Then, the hook 321 is gradually moved back into the guide groove 112 in the negative X-axis direction, causing the suture end 410 of the surgical suture 400 to be pulled into the clearance groove 110. During this process, the thread 420 of the surgical suture 400 will be positioned around the blood vessel 500 as the thread end 410 moves. Then, the hook 321 continues to operate, pulling the thread end 410 of the surgical suture 400 from outside the spring body 211 of the coil spring 210 until it hooks with the hook end 213 of the coil spring 210. Then, the extension end 212 of the coil spring 210 is pulled, thereby causing the hook end 213 of the coil spring 210 to pull the thread end 410 of the surgical suture 400. As the coil spring 210 rotates, the thread 420 of the surgical suture 400, which passes through the coil spring 210, rotates around the spring body 211, causing the surgical suture 400 to form a surgical knot. Then, the extended end 212 of the coil spring 210 is pulled further, causing the surgical knot of the surgical suture 400 to tighten around the blood vessel 500. Finally, the excess surgical suture 400 is cut off with a scalpel, thus completing the ligation of the blood vessel 500. In this way, through the cooperation of the guide hook 322 and the pull hook 321, the surgical suture 400 can form a surgical knot for ligating the blood vessel 500.

[0051] The hook 321 extending from the outlet 111 has a magnetic attraction part 3211 at one end, and the end 410 of the surgical suture 400 is made of a magnetic material, such as iron, that can be held by a magnetic material. Thus, the hook 321 can quickly hook onto the end 410 of the surgical suture 400 using magnetic force. The other end of the hook 321 extends from the guide groove 112 away from the outlet 111 beyond the gun body 100. This allows for manual operation of the hook 321.

[0052] It should be noted that, specifically in this embodiment, the magnetic force between the hook member 321 and the end 410 of the surgical suture 400 is less than the hooking force between the end 410 of the surgical suture 400 and the hooking end 213 of the spiral spring 210. This allows the hooking end 213 of the spiral spring 210 to hook the end 410 of the surgical suture 400 off the hook member 321.

[0053] Furthermore, the aforementioned hook member 321 is made of a flexible material, such as a metal strip. This allows the hook member 321 to move along the guide groove 112.

[0054] like Figure 1 and Figure 2 As shown, in some embodiments, the guide hook 322 is rotatably connected to the gun body 100, and the traction mechanism 300 further includes a transmission component 330 that is tractively connected to the guide hook 322. The transmission component 330 is used to controllably rotate the guide hook 322 relative to the gun body 100. Specifically, the end face of the gun body 100 is provided with a connecting portion 150, and the guide hook 322 is rotatably connected to the connecting portion 150. When it is necessary to hook the guide hook 322 around the blood vessel 500, the transmission component 330 can be operated first to rotate the guide hook 322 relative to the gun body 100 to the position where the distance between the end of the guide hook 322 and the end face of the gun body 100 is the largest. Then, the gun body 100 is operated so that the blood vessel 500 passes through the notch between the end of the guide hook 322 and the end face of the gun body 100 and enters the hook area of ​​the guide hook 322, thus hooking the guide hook 322 around the blood vessel 500. Thus, since the guide hook 322 is rotatable, it is easy for the guide hook 322 to be hooked around the blood vessel 500.

[0055] It should be noted that the end of the guide hook 322 is the end of the guide hook 322 that is away from the connecting part 150. Furthermore, the guide hook 322 is connected to the gun body 100 via a pin.

[0056] like Figure 2As shown, specifically, the transmission assembly 330 includes a first transmission member 331 and a second transmission member 332 that is pulsatorically connected to the first transmission member 331. The second transmission member 332 is also fixedly connected to the guide hook 322. The first transmission member 331 can controllably drive the second transmission member 332 to rotate relative to the gun body 100, so that the guide hook 322 rotates with the second transmission member 332 relative to the gun body 100. When it is necessary to rotate the guide hook 322, the first transmission member 331 can be operated to drive the second transmission member 332 to rotate relative to the gun body 100, thereby causing the guide hook 322 to rotate with the second transmission member 332 relative to the gun body 100. Thus, by operating the first transmission member 331, the guide hook 322 can be made to rotate with the second transmission member 332 relative to the gun body 100.

[0057] In this specific embodiment, the first transmission component 331 is a rack and pinion, and the second transmission component 332 is a gear. The gear meshes with the rack and pinion, and the gear is coaxial with and fixedly connected to the pinion. Thus, by stretching or pushing the rack, the guide hook 322 can rotate relative to the gun body 100 with the gear.

[0058] Specifically, the push assembly 310 includes a sliding rod 312 that is slidably connected to the wall of the sliding groove 130, and a push rod 311 connected at one end to the sliding rod 312. The other end of the push rod 311 is provided with a push part 3111 for pushing the abutment part 411 on the end 410 of the surgical suture 400. Before ligating the blood vessel 500, the push assembly 310 is operated to push the end 410 of the surgical suture 400 from the end of the gun body 100 away from the guide hook 322 and insert it into the sliding groove 130. Then, the sliding rod 312 is pushed to move along the sliding groove 130 in the first direction, and at the same time, the push part 3111 of the push rod 311 pushes the abutting part 411 of the end 410, thereby pushing the end 410 of the surgical suture 400 from the sliding groove 130 through the spring body 211 of the spiral spring 210 located in the knot groove 120 and pushing it to the outlet 111, thus preparing for the hook assembly 320 to hook the end 410 of the surgical suture 400. Before the knotting mechanism 200 is operated to form a surgical knot with the surgical suture 400, the sliding rod 312 must first be pulled along the sliding groove 130 in the negative direction of the X-axis, so that the push rod 311 disengages from the knotting groove 120, thereby preventing the push rod 311 from interfering with the operation of the knotting mechanism 200. In this way, by operating the sliding rod 312, the push assembly 310 can push the end 410 of the surgical suture 400 through the spring body 211 of the coil spring 210.

[0059] When the surgical suture 400 is installed into the gun body 100, the end 410 of the surgical suture 400 is pushed from the sliding groove 130 away from the outlet 111 by the pushing part 3111 of the pushing rod 311 and inserted into the sliding groove 130 from outside the gun body 100. In this way, preparations can be made before ligating the blood vessel 500.

[0060] One embodiment relates to a vascular ligator, which includes the above-described knotting device.

[0061] When ligating blood vessel 500 using the aforementioned vascular ligator, firstly, the end 410 of the surgical suture 400 is moved along the first direction through the spring body 211 of the spiral spring 210, so that the thread 420 of the surgical suture 400 passes through the spring body 211 of the spiral spring 210 along the first direction with the end 410. Then, the end 410 of the surgical suture 400, having passed through the spring body 211 of the spiral spring 210, is moved around the blood vessel 500, and the end 410 hooks with the hook end 213 of the spiral spring 210, so that the thread 420 of the surgical suture 400 is wrapped around the outside of the blood vessel 500 with the end 410. Then, the extension end 212 is pulled, so that the spring body 211 of the spiral spring 210 abuts against the abutment member 220. The coil spring 210 deforms and extends, causing its body 211 to rotate. This causes the thread end 410 of the surgical suture 400, hooked by the hook end 213 of the coil spring 210, to rotate around the thread 420 of the surgical suture 400 that passes through the coil spring 210's body 211. This allows the surgical suture 400 to form a surgical knot for ligating the blood vessel 500. Then, the traction device 230 is operated to pull the extension end 212 of the coil spring 210, causing the hook end 213 to tighten the surgical knot, thus securing the blood vessel 500. Finally, the excess surgical suture 400 is cut off with a scalpel, completing the ligation of the blood vessel 500. In this way, simply operating the traction device 230 to pull the extension end 212 of the coil spring 210 allows the surgical suture 400 to quickly form a surgical knot and secure the blood vessel 500.

[0062] It should be noted that this application uses ligation of blood vessels as an example to explain the operating principle of the vascular ligator and the buckling device. It should not be understood that the vascular ligator and the buckling device can only be used to ligate blood vessels 500, but can also be used to ligate tubular human tissues such as the intestines.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A knotting device, characterized in that, include: Gun body, the gun body being provided with a fastening groove; and A fastening mechanism is provided in the fastening groove. The fastening mechanism includes a helical spring and a contact member that abuts against the spring body of the helical spring. The helical spring has a hook end and an extension end arranged sequentially along a first direction. The extension end is used to be pulled to drive the spring body of the helical spring to move. The contact member is used to cause the spring body of the moving helical spring to be deformed by the contact member and extend, so that the spring body of the helical spring can rotate. During the rotation of the helical spring, the end of the surgical suture hooked by the hook end rotates around the thread of the surgical suture passing through the helical spring as the spring body rotates, so that the surgical suture forms a surgical knot. The fastening device further includes a traction mechanism connected to the gun body. The traction mechanism is used to controllably pull the thread end to move along the first direction through the spring body of the helical spring. The traction mechanism is also used to controllably pull the thread end passing through the spring body of the helical spring to move from outside the spring body of the helical spring to hook with the hook end. The gun body is provided with a sliding groove that passes through the fastening groove; The traction mechanism includes a push assembly disposed in the sliding groove and a hook assembly connected to the gun body, wherein the push assembly is movable along the first direction; wherein, the push assembly is used to controllably push the suture end through the spring body of the helical spring along the first direction; the hook assembly is used to controllably hook the suture thread passing through the spring body of the helical spring to surround the blood vessel, and the hook assembly is also used to controllably hook the suture end from outside the spring body of the helical spring to hook it with the hooking end of the helical spring.

2. The fastening device according to claim 1, characterized in that, The abutting member includes an abutting ring with an abutting groove, the extended end of which passes through the abutting groove, and the spring body of the helical spring abuts against the abutting ring.

3. The fastening device according to claim 1, characterized in that, The groove wall of the fastening groove is provided with a stretching groove; The fastening mechanism further includes a traction member slidably disposed in the stretching groove. One end of the traction member is connected to the extension end, and the other end of the traction member is used to be pulled to drive the extension end to pull the spring body of the helical spring to move.

4. The fastening device according to claim 1, characterized in that, The gun body is also provided with a guide groove, and the end face of the gun body has an outlet that communicates with the guide groove, and the sliding groove is also communicated with the outlet; The hook assembly includes a hook component slidably disposed in the guide groove and a guide hook connected to the gun body, and the hook component can be controlled to extend out from the outlet; The guide hook is used to guide the hook extending from the outlet to the outside of the blood vessel and to hook the hook through the end of the thread on the spring body of the helical spring.

5. The fastening device according to claim 4, characterized in that, The guide hook is rotatably connected to the gun body, and the traction mechanism further includes a transmission component that is tractively connected to the guide hook. The transmission component is used to controllably rotate the guide hook relative to the gun body.

6. The fastening device according to claim 1, characterized in that, The push assembly includes a sliding rod that is slidably connected to the wall of the sliding groove, and a push rod connected at one end to the sliding rod. The other end of the push rod is provided with a push part for pushing the end of the surgical suture.

7. A vascular ligator, characterized in that, Includes the fastening device as described in any one of claims 1 to 6 above.

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