Vascular tissue ligator and ribbon ligating system

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a vascular tissue ligator and a ribbon ligating system.A ribbon is provided with a connecting rib and can be pulled apart under the action of external force so as to achieve the purpose of separating a binding part from a traction part, and redundant parts can be removed conveniently; a ribbon feeding mechanism of the vascular tissue ligator can automatically feed ribbons and push the ribbons into a ribbon guide mechanism, the ribbons are guided by a guide channel of the ribbon guide mechanism to form a loop ligature ring wound on a blood vessel, a push head extends into a containing space between two guide claws, the center position of the loop ligature ring is small in deviation, and the blood vessel ligator is convenient to use. The binding belt is tightened through the traction mechanism, blood vessel ligation is completed, finally, the connecting rib is pulled apart to enable the traction part to be separated from the binding part, the binding belt can be automatically fed, damage to the blood vessel and surrounding tissue in the blood vessel ligation process is reduced, the blood vessel ligation efficiency is high, the blood vessel ligation effect is good, and safety is high.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a vascular tissue ligator and a ligation system. Background Technology

[0002] With the advancement of medical technology and people's awareness, surgical procedures are gradually becoming more minimally invasive. Compared with conventional surgery, minimally invasive surgery causes as little trauma as possible to patients, including medical structural and psychological trauma. Because minimally invasive surgery is less traumatic, patients suffer less pain, experience less physical damage, and recover faster, thus effectively reducing and avoiding the iatrogenic trauma and complications left by traditional surgery.

[0003] The term "minimally invasive surgery" is essentially surgery performed using a "laparoscopy" or laparoscopic surgery. Compared to traditional open surgery, it has the technical characteristics of less trauma, faster recovery, and shorter hospital stay. Its essence is the same as that of open surgery, but it changes the traditional surgical approach, separation steps, ligation and suturing methods, as well as the way of observation during the operation. Instead of direct visual observation, it is observed through an endoscope.

[0004] Laparoscopy is increasingly used in surgery; laparoscopic, thoracic, arthroscopic, cystoscopic, and hysteroscopic surgeries are benefiting more and more patients. However, vascular ligation during various laparoscopic surgeries has always been a challenge for clinicians. Vascular ligation can be achieved by closing blood vessels with ligation clips or by suturing them with surgical sutures. Due to the special nature of minimally invasive surgery, the instruments used are usually inserted into the lesion through small openings. The operation space and visibility are limited when using laparoscopy. When ligating blood vessels with surgical sutures, complex manipulation of the needle and suture is required to form the necessary knot. These complex operations are time-consuming and demand a high level of skill from the surgeon. In contrast, ligation clips are relatively easy and quick to apply. Therefore, the use of ligation clips in surgical endoscopic surgery has increased dramatically. Clip applicators are essential tools for applying ligation clips, used to manipulate the clips to facilitate the ligation of fluid lines during surgery. However, ligation clips rely on their own clamping force and may loosen or fall off due to the reduction of tissue edema, vascular pulsation, or external traction, posing a risk of displacement. Furthermore, ligation clips occupy a large space and can cause damage to other tissues post-operatively. To improve safety and reduce potential surgical risks, existing technologies also utilize vascular ligation bands to ligate blood vessels and other fluid lines.

[0005] For example, a minimally invasive surgical vascular ligation device is disclosed in patent application number "CN201710567781.6". However, during use, each ligation strip needs to be secured, and the ligation strip is secured by a buckle-like structure. When the buckle is used to secure the end of the ligation strip, the end of the ligation strip is not actually fixed. When ligating a blood vessel, if the sliding rail structure at the head end penetrates to the bottom of the blood vessel, the ligation strip may loosen. After the ligation strip is stuck in the notch of the notch at the tail end, the small hole at the tail end of the ligation strip is difficult to fit into the small cylinder, and it can only ligate once at a time. Furthermore, it does not conceal the ligation strip and the micro-scissors. When the end of the ligation strip is inserted into the bottom of the blood vessel, the protruding part of the ligation strip and the part exposed outside the sleeve may also cause damage to the blood vessel or other tissues. Since the tail end of the ligation strip is locked onto the buckle, during the ligation process, the ligation strip tightens towards the tail end, and the center of the loop formed by the ligation strip moves towards the tail end. During this displacement, the blood vessel is prone to large displacement, which can cause damage to the blood vessel. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a vascular tissue ligator and a ligation system, which can automatically feed ligation bands, reduce damage to blood vessels and surrounding tissues during vascular ligation, achieve continuous ligation, and has high efficiency, good effect and high safety in vascular ligation.

[0007] This invention provides a vascular tissue ligator, comprising: A housing, wherein a cylindrical body is provided on the housing, and a guide portion is provided inside the cylindrical body; A cable tie guiding mechanism is located at the front end of the cylinder and includes two sets of guide claws with openable and closable front ends and guide gaps at the rear ends. When closed, the two sets of guide claws enclose a receiving space, and the cable tie guide grooves on the two sets of guide claws are connected to form a guide channel for the cable tie to pass through, and one of the cable tie guide grooves is connected to the guide part. The feeding mechanism is used to push the cable ties into the guide section; The feeding mechanism includes a pusher that can move along the length of the guide portion, and the front end of the pusher can extend into the receiving space through the guide gap; The traction mechanism operably engages the end of the cable tie and applies a traction force to that end, causing it to displace in the tightening direction.

[0008] Furthermore, the cable tie guiding mechanism also includes: A support is provided on the inner wall of the front end of the cylinder, wherein the rear end of at least one of the guide claws is hinged to the support and can rotate along the fulcrum by being driven by a first power device. A reset elastic element is provided at the front end of the support, with one end of the reset elastic element abutting against the inner wall of the cylinder and the other end abutting against the outer side of the guide claw.

[0009] Furthermore, the first power unit includes: A tensioning wheel is located inside the housing and is driven to rotate by a first rotating mechanism; A pull line is connected at one end to the tightening wheel and at the other end to the outer wall of the guide claw, with the connection point located on the front side of the support.

[0010] Furthermore, it also includes a flexible sleeve fitted onto the guide claw, the flexible sleeve having an opening on the side near the receiving space.

[0011] Furthermore, the feeding mechanism is disposed within the housing and includes: A support plate extends from one side through the feed inlet on the cylinder to the guide section. The magazine has two side plates and two end plates. The two end plates are fixed to the support plate. The two side plates are fixed to the two end plates and have a gap between them and the support plate. The two side plates are provided with guide plates extending backward, wherein the guide plate near the cylinder extends through the feed port to the guide section. A pusher plate is movably disposed between the support plate and the guide plate, and the pusher plate is connected to the output end of the linear drive mechanism.

[0012] Furthermore, the actuating element includes: A push rod is slidably disposed in the guide portion and moved by a second power device. The front end of the push rod is bent upward to form a limiting step, and the back of the limiting step can abut against the limiting block at the front end of the cylinder. A pusher head is located at the front end of the push rod and is adapted to the locking part of the cable tie. The thrust center line of the pusher head is collinear with the clamping center line of the traction mechanism.

[0013] Furthermore, the second power unit includes: The first long rack is disposed on the push rod and located in the rack guide groove on the cylinder. The rack guide groove is connected to the guide part and is separated by a limiting protrusion. A first drive gear is disposed inside the housing and meshes with the first long rack. The first drive gear is connected to the output end of the second rotating mechanism.

[0014] Furthermore, the pusher has a through hole for the cable tie to pass through, and when the pusher acts on the cable tie, the center line of the through hole is collinear with the center line of the locking part of the cable tie.

[0015] Furthermore, the traction mechanism is located above the feeding mechanism and includes two rows of ratchet wheels arranged in parallel on the ratchet support. The teeth of the two rows of ratchet wheels together form a clamping surface for the cable tie. The two rows of ratchet wheels rotate synchronously and in opposite directions through a third power device to traction the cable tie. The ratchet support is driven by a fourth power device to move along the length direction of the cylinder.

[0016] Furthermore, the third power unit includes: A transmission gear is provided on the ratchet and the transmission gears on the two rows of ratchets mesh with each other; The third drive gear is mounted on one of the ratchet rows and rotates synchronously via a timing belt, and one of the third drive gears is fixed to the output end of the third rotating mechanism.

[0017] Furthermore, the fourth power unit includes: The second long rack is mounted on the ratchet support. The fourth drive gear is connected to the output end of the fourth rotating mechanism located inside the housing, and the fourth drive gear meshes with the second long rack.

[0018] Furthermore, the front end of the ratchet support is provided with a puller, which has a one-way locking hole. The one-way locking hole and the through hole on the pusher are located on the same axis, and the outlet of the one-way locking hole corresponds to the gap between the two rows of ratchet wheels.

[0019] Furthermore, the exit side of the guide channel is provided with a guide piece that extends downwards and at an angle away from the receiving space.

[0020] The beneficial effects of using the present invention are as follows: The shell and cylinder of the vascular ligator are used to install and support the internal main structure and to conceal the structure. The smooth exterior of the cylinder avoids damage to the internal tissue, and the guide part inside the cylinder guides the movement of the ligature so that it can be accurately inserted into the ligature guiding mechanism.

[0021] The feeding mechanism pushes the cable ties into the guide section for automatic feeding, eliminating the need for medical staff to manually insert the cable ties. This simple and convenient operation improves surgical efficiency.

[0022] The cable delivery mechanism pushes the cable into the guide section and into the cable guide mechanism, where it bends through the guide channel to form a loop around the blood vessel. During this process, the front end of the pusher of the delivery mechanism can extend into the receiving space through the guide gap, continuously pushing the locking part of the cable towards the blood vessel as it tightens, compensating for any offset in the center of the loop during tightening. As the inner diameter of the loop gradually decreases, it prevents the cable from tightening only towards the locking part, which could cause the center of the loop to shift towards the locking part, leading to excessive displacement of the blood vessel and surrounding tissue, potentially resulting in tearing of the vessel wall or tissue avulsion. In this case, the offset distance of the loop center after winding is small, or even remains constant, reducing the pulling force on the blood vessel and surrounding tissue, and preventing damage to the blood vessel or tissue. Furthermore, the pushing member acts on the locking part of the cable tie to limit its horizontal position. When the cable tie passes through its own locking part and enters the traction mechanism through the through hole on the pushing member, the cable tie bears axial tension when the traction mechanism applies traction force to the cable tie, reducing the lateral scraping force between the cable tie and the locking part. Moreover, when the cable tie is tightened, the pushing member extends into the designated position of the receiving space. At this time, the pushing member can also act as a limiting member to limit the position of the tightened cable tie, so that the position between the tightened ligature and the ligated blood vessel remains fixed. When the traction mechanism continuously applies traction force to the cable tie, the tightened ligature will not move, thus preventing traction on the blood vessel and damage to the blood vessel and surrounding tissues.

[0023] The ligature guiding mechanism is located at the front end of the cylinder. The front ends of the two sets of guide claws can open and close to clamp or release the blood vessel. The rear ends of the two guide claws have guide gaps, which facilitate the locking part of the ligature and the front end of the pusher to enter the receiving space through the guide gaps. When the two guide claws are closed, the ligature guide groove on one of the guide claws aligns with the guide part, allowing the ligature to enter the ligature guide groove from the guide part. Under the continuous push of the pusher, the ligature moves along the guide channel formed by the alignment of the ligature guide grooves on the two guide claws. Guided by the guide channel, it extends from the other side of the guide channel and passes into the locking part of the ligature, forming a ligature loop around the blood vessel.

[0024] The traction mechanism is used to tighten the ligature. It can be operably engaged with the end of the ligature and apply traction force to it. During this process, as the ligature gradually becomes smaller, the pusher gradually extends into the receiving space and moves closer to the blood vessel. The ligature is squeezed out from the guide channel, causing the ligature to contract, thus ligating and tightening the blood vessel.

[0025] In summary, this invention, through the cooperation of various mechanisms, enables automatic feeding of ligatures and continuous vascular ligation operations, saving surgical time, reducing damage to blood vessels and surrounding tissues during vascular ligation, and achieving high efficiency, good results, and high safety in vascular ligation.

[0026] The present invention also provides a ligation system, comprising the above-described vascular tissue ligator and vascular ligation band. The vascular ligation band is placed inside the magazine compartment of the feeding mechanism. The vascular ligature includes a body and a locking part. The body is a strip-shaped structure and has a groove area extending along the length of the body. The body includes a binding part and a traction part. The opposite ends of the binding part and the traction part have connecting ribs. The connecting ribs can be broken by external force. The locking part is located at the end of the binding part away from the traction part and has a ligature locking hole for the body to be wound and passed through.

[0027] The beneficial effects of this invention are as follows: when the ligature is tightened, the locking mechanism uses the slot area of ​​the main body and the locking hole of the ligature to lock the tightening ring of the hemostatic ligature in one direction. Through the design of the connecting ribs on the main body, the binding part and the traction part of the main body can be torn apart, and the breaking point of the main body can be controlled. In this way, the binding part and the traction part can be separated by external force. When the vascular ligature is placed in the magazine of the feeding mechanism, it is pushed into the guide part of the cylinder by the feeding mechanism. The vascular ligature is fed into the ligature guiding mechanism by the feeding mechanism. Under the action of the ligature guiding mechanism, the main body is wound around the blood vessel to form a ligature ring. The traction part passes through the locking hole on the locking part and enters the traction mechanism. Then, the traction mechanism pulls the traction part of the vascular ligature to move along the tightening direction to tighten the ligature ring. When the traction part of the vascular ligature is continuously pulled, the locking part of the vascular ligature is restricted by the pushing part, which restricts the position of the ligature loop formed by the ligature. This causes the force between the traction part and the locking part to gradually increase, act on the connecting rib, and break the connecting rib, which facilitates the precise separation of the excess part of the vascular ligature after ligation.

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the vascular tissue ligator of the present invention; Figure 2 for Figure 1 A magnified view of the details of A; Figure 3 This is a schematic diagram of the cross-sectional structure of the vascular tissue ligator of the present invention; Figure 4 for Figure 3 A magnified view of the details of B; Figure 5 This is a cross-sectional structural schematic diagram of the feeding mechanism of the vascular tissue ligator of the present invention; Figure 6 for Figure 5 A magnified view of the details of C; Figure 7 A schematic cross-sectional view of the traction mechanism of the vascular tissue ligator of the present invention; Figure 8 This is a three-dimensional structural schematic diagram of the traction mechanism of the vascular tissue ligator of the present invention; Figure 9 This is a three-dimensional structural schematic diagram of the tape delivery mechanism of the vascular tissue ligator of the present invention; Figure 10 This is a schematic diagram of the vascular ligation device of the present invention.

[0030] In the attached diagram: 100-shell, 110-cylinder, 111-guide section, 112-feed inlet, 113-limiting block, 114-rack guide groove, 115-limiting protrusion, 200-cable tie guiding mechanism, 210-guide claw, 211-upper guide claw, 212-lower guide claw, 213-accommodating space, 214-guide gap, 215-cable tie guide groove, 216-guide plate, 220-support, 230-reset elastic element, 240-first power unit, 241-tightening wheel, 242-first rotating mechanism, 243-pull cable, 250-flexible sleeve, 251-opening, 300-feeding mechanism, 310-support plate, 320-magazine magazine, 321-side plate, 322-end plate, 323-guide plate, 330-push plate, 34 0-Linear drive mechanism, 400-Belt feeding mechanism, 410-Pushing member, 411-Push rod, 412-Limiting step, 413-Push head, 414-Through hole, 420-Second power unit, 421-First long rack, 422-First drive gear, 423-Second rotating mechanism, 500-Traction mechanism, 510-Ratchet, 520-Third power unit, 521-Transmission gear, 522-Third drive gear, 523-Synchronous belt, 524-Third rotating mechanism, 530-Ratchet support member, 531-First long strip plate, 532-Second long strip plate, 540-Fourth power unit, 541-Second long rack, 542-Fourth drive gear, 543-Fourth rotating mechanism, 550-Belt puller, 551-One-way locking hole; 10-Body, 11-Card slot area, 12-Binding part, 13-Traction part, 14-Connecting rib, 15-Guide part, 16-Connecting part, 20-Locking part, 21-Cable strap locking hole. Detailed Implementation

[0031] Referring to the accompanying drawings, specific embodiments of the present invention will be described in detail.

[0032] Reference Figures 1 to 9 The present invention provides an embodiment of a vascular tissue ligation device.

[0033] A vascular ligation device includes a housing 100, a ligation guide mechanism 200, a feeding mechanism 300, a ligation delivery mechanism 400, and a traction mechanism 500. The housing 100 is used to install and protect the main body; the ligation guide mechanism 200 guides the movement of the ligation, allowing the ligation body to loop and pass into its locking portion 20; the feeding mechanism 300 automatically feeds the ligation, eliminating the need for manual insertion by medical personnel, simplifying operation and improving surgical efficiency; the ligation delivery mechanism 400 delivers the ligation into the ligation guide mechanism 200; and the traction mechanism 500 applies traction to the end of the ligation, tightening the loop formed after the ligation is wound.

[0034] The housing 100 is provided with a cylindrical body 110. The shape of the housing 100 is not limited, as long as it can support and shield the main body. An opening 251 can be provided at the rear end of the housing 100 for discharging cable ties waste. Preferably, the housing 100 has a hand-held part for easy operation by medical personnel. A controller can be provided on the handle to control the movement of each mechanism. In this invention, the driving structure of each mechanism can be controlled by a microcontroller.

[0035] Preferably, the cross-section of the cylinder 110 is circular or elliptical, and it may consist of two half-shells. The exterior is smooth to avoid damage to human tissue when the cylinder 110 is inserted into the human body. In this embodiment, the cross-section of the cylinder 110 is circular. The cylinder 110 and the shell 100 are used to install and support the internal main structure, and to conceal the various structures.

[0036] The cylindrical body 110 has a guide section 111. The cable tie is pushed into the guide section 111 by the feeding mechanism 300. The guide section 111 guides the movement of the cable tie within the cylindrical body 110, ensuring it accurately enters the cable tie guiding mechanism 200. Furthermore, the guide section 111 is located on the inner wall of the cylindrical body 110 and is integrally formed with the cylindrical body 110. Preferably, the guide section 111 is a guide groove, the width of which is adapted to the width of the cable tie.

[0037] The cable tie guiding mechanism 200 is located at the front end of the cylinder 110 and includes two sets of guide claws 210 with openable and closable front ends and guide gaps 214 at the rear ends. The guide gaps 214 at the rear ends allow the locking part 20 of the cable tie and the front end of the pushing member 410 to enter the receiving space 213 through the guide gaps 214. The opening and closing of the front ends of the two sets of guide claws 210 achieves clamping or loosening of the blood vessel.

[0038] When closed, the two sets of guide claws 210 enclose and form a receiving space 213, which is used to receive blood vessels or other target objects.

[0039] The cable tie guide grooves 215 on the two sets of guide claws 210 are joined to form a guide channel through which the cable tie passes, and one of the cable tie guide grooves 215 is joined to the guide portion 111. Further, the outlet side of the guide channel is provided with a guide piece 216 extending obliquely downwards away from the receiving space 213. The guide piece 216 is used to guide the cable tie into its own locking hole. Under the continuous pushing of the pusher 410, the cable tie enters from the guide portion 111 inside the cylinder 110 into the cable tie guide groove 215 that is joined thereto, and moves along the guide channel formed by the joining of the cable tie guide grooves 215 on the two guide claws 210. Guided by the guide channel, it extends out from the other side of the guide channel and passes into the locking portion of the cable tie, forming a ligation loop around the blood vessel.

[0040] The feeding mechanism 400 includes a pusher 410 that can move along the length of the guide portion 111. The front end of the pusher 410 can extend into the receiving space 213 through the guide gap 214. At this time, the feeding mechanism 400 can push the cable ties that have entered the guide portion 111 into the cable tie guiding mechanism 200, and cause them to bend through the guiding channel of the cable tie guiding mechanism 200 to form a loop around the blood vessel.

[0041] Because the front end of the pusher 410 of the cable feeding mechanism 400 can extend into the receiving space 213 through the guide gap 214, the pusher 410 continuously pushes the locking part of the cable towards the blood vessel during the tightening process, compensating for the offset of the center of the ligature loop when the cable is tightened. That is, as the inner diameter of the ligature loop gradually decreases, it avoids the cable only tightening towards the locking part, which could cause the center of the ligature loop to shift towards the locking part, leading to excessive offset of the blood vessel and surrounding tissue, tearing of the blood vessel wall, or tissue avulsion. At this time, the offset distance of the center of the ligature loop formed after the cable is wound is small, or even remains unchanged, reducing the pulling on the blood vessel and surrounding tissue and avoiding damage to the blood vessel or tissue.

[0042] Furthermore, the pusher 410 acts on the locking part of the cable tie to limit its horizontal position. When the cable tie is tightened, the pusher 410 extends into the designated position of the receiving space 213. At this time, the pusher 410 can also act as a limiting member to limit the position of the cable tie after it is tightened, so that the position between the tightened ligature and the ligated blood vessel remains fixed. When the traction mechanism 500 continuously applies traction force to the cable tie, the tightened ligature will not move significantly, thus preventing traction on the blood vessel and damage to the blood vessel and surrounding tissues.

[0043] The traction mechanism 500 operably engages with the end of the cable tie and applies traction force to that end, causing it to displace along the tightening direction. During the traction process, the traction mechanism 500 applies traction force to the cable tie, the ligature gradually shrinks, the pusher 410 gradually extends into the receiving space 213 towards the blood vessel, and the cable tie is squeezed out of the guide channel, causing the ligature to contract, thus ligating and tightening the blood vessel. In this embodiment, the traction mechanism 500 can be connected to the cable tie by clamping, grasping, or other methods, which are not limited here.

[0044] In some embodiments, a flexible sleeve 250 is further included, which is sleeved on the guide claw 210, and the flexible sleeve 250 has an opening 251 on the side near the receiving space 213. Preferably, the inner side of the flexible sleeve 250 is broken to form a gap. At this time, the flexible sleeve 250 can be made of flexible material to wrap the guide claws 210, so as to avoid damage to the blood vessels when the two guide claws 210 clamp the blood vessels. When the flexible sleeve 250 is placed on the guide claws 210, the flexible sleeve 250 covers the cable tie guide groove 215 on it. When the two guide claws 210 clamp the blood vessels, the flexible sleeve 250 does not sink in under the pressure of human tissue, ensuring that the cable tie guide groove 215 is unobstructed. At the same time, when guiding the movement of the cable tie, it further restricts the movement of the cable tie. The opening 251 on the inner side of the flexible sleeve 250 causes the cable tie to squeeze the flexible sleeve 250 during the tightening process. The gap on the flexible sleeve 250 deforms, allowing the cable tie to be squeezed out from the opening 251, thus achieving the tightening of the cable tie.

[0045] In some embodiments, the cable tie guiding mechanism 200 further includes a support 220 and a reset elastic element 230.

[0046] The support 220 is used to support the guide claw 210. The support 220 is disposed on the inner wall of the front end of the cylinder 110. The rear end of at least one of the guide claws 210 is hinged to the support 220 and can rotate along the fulcrum by being driven by the first power device 240. The rotation of the guide claw 210 realizes the opening and closing of the front end of the guide claw 210, thereby realizing the clamping or releasing of the blood vessel. Further, the guide claw 210 includes an upper guide claw 211 and a lower guide claw 212 that can be opened and closed. The ligature guide groove 215 is disposed on the opposite side of the upper guide claw 211 and the lower guide claw 212. The opening 251 of the flexible sleeve 250 corresponds to the opening 251 of the ligature guide groove 215. The position of the lower guide claw 212 is fixed, and the ligature guide groove 215 on it is always connected to the guide part 111. The upper guide claw 211 is hinged to the support 220 and can rotate along the fulcrum.

[0047] Furthermore, the first power device 240 includes a tensioning wheel 241 and a pull cable 243. The tensioning wheel 241 is located inside the housing 100 and is driven to rotate by the first rotating mechanism 242. One end of the pull cable 243 is connected to the tensioning wheel 241, and the other end is connected to the outer wall of the guide claw 210, with the connection point located on the front side of the support 220. Specifically, in this embodiment, one end of the pull cable 243 is disposed on the upper guide claw 211. The outer wall of the upper guide claw 211 is provided with a mounting post movably connected to the pull cable 243, and the mounting post is located on the side of the reset elastic member 230 away from the support 220. At this time, the first rotating mechanism 242 drives the tensioning wheel 241 to rotate, so that the pull cable 243 is wound on the tensioning wheel 241 or released from the tensioning wheel 241, causing the front end of the upper guide claw 211 to open with the lower guide claw 212. The first rotating motor can be a stepper motor, servo motor, DC motor, etc., which can be selected according to actual needs.

[0048] The reset elastic element 230 is used to reset the rotated guide claw 210, closing its front end to clamp onto the blood vessel. The reset elastic element 230 is located at the front end of the support 220, with one end abutting the inner wall of the cylinder 110 and the other end abutting the outer surface of the guide claw 210. Further, the reset elastic element 230 is located on the outside of the rotatable guide claw 210. In this embodiment, it can be located on the outside of the upper guide claw 211. The outer surface of the upper guide claw 211 is also provided with a U-shaped plate, and one end of the reset elastic element 230 is fixed in the cavity of the U-shaped plate, limiting the end of the reset elastic element 230. The reset elastic element 230 can be a torsion spring. When the upper guide claw 211 rotates to open the front ends of the two guide claws 210, the torsion spring stores elastic potential energy; when the upper guide claw 211 rotates to close the front ends of the two guide claws 210, the torsion spring releases the elastic potential energy.

[0049] In this manner, when the upper guide claw 211 needs to rotate to separate and open the front end of the upper guide claw 211 and the front end of the lower guide claw 212, the first rotating mechanism 242 drives the tightening wheel 241 to rotate in the first direction, so that the pull wire 243 is wound around the tightening wheel 241. The pull wire 243 pulls the upper guide claw 211 to rotate around its hinge fulcrum, and the torsion spring is compressed to store elastic potential energy. When the upper guide claw 211 needs to rotate to close the front end of the upper guide claw 211 and the front end of the lower guide claw 212, the first rotating mechanism 242 drives the tightening wheel 241 to rotate in the second direction, which is opposite to the first direction, so that the pull wire 243 is released from the tightening wheel 241, and the torsion spring releases its elastic potential energy to reset the upper guide claw 211.

[0050] In some embodiments, the feeding mechanism 300 is disposed inside the housing 100 and includes a support plate 310, a magazine 320 and a pusher plate 330. The support plate 310 fixes and supports the entire feeding mechanism 300. The magazine 320 is used to store multiple cable ties. The pusher plate 330 is used to push the cable ties in the magazine 320 into the guide portion 111 of the cylinder 110.

[0051] The support plate 310 can be fixed to the housing 100 and / or the cylinder 110. One side of the support plate 310 extends through the feed port 112 on the cylinder 110 into the guide portion 111. The feed port 112 on the cylinder 110 is positioned corresponding to the magazine compartment 320, so that the cable ties in the magazine compartment 320 enter the guide portion 111 in the cylinder 110 through the feed port 112.

[0052] The magazine compartment 320 has two side plates 321 and two end plates 322, whose axial direction is consistent with the length direction of the cylinder 110. The two end plates 322 are fixed to the support plate 310, connecting the magazine compartment 320 to the support plate 310. The two side plates 321 are fixed to the two end plates 322 and have a gap between them and the support plate 310. The two side plates 321 are provided with guide plates 323 extending backward, wherein the guide plate 323 near the side of the cylinder 110 extends through the feed port 112 to the guide portion 111. At this time, a gap is formed between the guide plate 323 and the side plate 321 for the pusher plate 330 to move, and the cable tie located at the bottom of the magazine compartment 320 can be pushed out from the gap at the bottom and enter the guide portion 111 of the cylinder 110 along the gap between the guide plate 323 and the side plate 321.

[0053] A pusher plate 330 is movably disposed between the support plate 310 and the guide plate 323, and the pusher plate 330 is connected to the output end of the linear drive mechanism 340. The linear drive mechanism 340 drives the pusher plate 330 to move along the radial direction of the cylinder 110, pushing the cable ties at the bottom of the magazine compartment 320 into the guide portion 111 of the cylinder 110.

[0054] Furthermore, the linear drive mechanism 340 is located on the other side of the cylinder 110 away from the support plate 310. The output end of the linear drive mechanism 340 is fixed to the connecting block. The support plate 310 has a clearance opening 251 on its upper part. The upper end of the connecting block moves through the clearance opening 251 and is fixed to the bottom of the pusher plate 330. This results in a compact structure, better suited to the narrow installation space within the housing 100. Furthermore, a first sensor is provided inside the housing 100, and a first sensing part is provided on the connecting block to cooperate with the first sensor. The position of the pusher plate 330 is measured through the cooperation of the first sensor and the first sensing part, thereby facilitating the control of the position state of the pusher plate 330.

[0055] In some embodiments, the feeding mechanism 400 includes a pusher 410 and a second power device 420. The second power device 420 drives the pusher 410 to move along the axial direction of the guide portion 111. The pusher 410 can move to the front end of the cylinder 110 or retract to the rear end of the cylinder 110, so that the guide portion 111 of the cylinder 110 is exposed, making it easier for the cable tie to enter.

[0056] The pushing member 410 includes a push rod 411 and a push head 413. The push rod 411 is slidably disposed within the guide portion 111 and moves via the second power device 420. The push head 413 is disposed at the front end of the push rod 411 and is adapted to the locking portion of the cable tie. The thrust center line of the push head 413 is collinear with the clamping center line of the traction mechanism 500. The shape of the push head 413 matches the shape of the locking portion of the cable tie. Furthermore, the push head 413 has an indentation groove that engages one end face of the locking portion. When the locking portion engages in the indentation groove, it limits the locking portion, preventing it from slipping off from the push head 413, ensuring stable advancement of the cable tie, and stabilizing the relative position between the cable tie and the push head 413. This ensures that the thrust center line of the push head 413 is collinear with the center line of the cable tie and does not deviate. At this time, the second power device 420 drives the push rod 411 to move, which in turn drives the push head 413 to push the cable tie to move within the guide section 111. During this process, the guide section 111 can guide the movement of both the cable tie and the push rod 411.

[0057] Furthermore, the front end of the push rod 411 is bent upward to form a limiting step 412, and the back of the limiting step 412 can abut against the limiting block 113 at the front end of the cylinder 110. When the push rod 411 moves towards the front end of the cylinder 110 and the limiting step 412 abuts against the positioning block, it is the maximum distance that the push head 413 can extend outward, that is, the maximum movement distance after the push head 413 pushes the locking part of the ligature into the receiving space 213. This avoids excessive compression of the blood vessel after the push head 413 extends excessively outward, causing the center of the ligature loop to shift excessively away from the cylinder 110.

[0058] Furthermore, the pusher 413 has a through hole 414 for the cable tie to pass through. When the pusher 413 acts on the cable tie, the center line of the through hole 414 is collinear with the center line of the locking part of the cable tie. At this time, the clamping center lines of the through hole 414, the locking part, and the traction mechanism 500 are all collinear. When the cable tie passes through its own locking part and enters the traction mechanism 500 through the through hole 414 on the pusher 410, the traction mechanism 500 applies a traction force to the cable tie. The cable tie bears axial tension, reducing the lateral scraping force between the cable tie and the locking part and improving the tightening effect of the cable tie.

[0059] Furthermore, the second power unit 420 includes a first long rack 421 and a first drive gear 422, and includes a first long rack 421, a first drive gear 422 and a second rotating mechanism 423. The second rotating mechanism 423 can be a stepper motor, a servo motor, a DC motor, etc., which can be selected according to actual needs.

[0060] The first long rack 421 is disposed on the push rod 411 and located in the rack guide groove 114 on the cylinder 110. The rack guide groove 114 communicates with the guide part 111 and is separated by a limiting protrusion 115. Preferably, the first long rack 421 and the push rod 411 form an integral structure with an I-shaped cross-section, and the limiting protrusion 115 engages with the concave part of the I-shaped structure to limit the position of the first long rack 421 and the push rod 411 as a whole.

[0061] The first drive gear 422 is disposed inside the housing 100 and meshes with the first long rack 421. The first drive gear 422 is connected to the output end of the second rotating mechanism 423. At this time, the second rotating mechanism 423 drives the first drive gear 422 to rotate, and the rotation of the first drive gear 422 can drive the first long rack 421 to move along the length direction of the cylinder 110.

[0062] When the feeding mechanism 300 feeds the cable ties, the pusher 410 retracts to the rear end of the housing 100, and the guide 111 is exposed so that the cable ties can enter the guide 111. When it is necessary to push the cable ties into the cable tie guiding mechanism 200, the push rod 411 of the pusher 410 moves in the guide 111, pushing the cable ties toward the cable tie guiding mechanism 200.

[0063] Furthermore, a second sensing part is provided on the end of the first long rack 421 away from the push head 413, and two second sensors that cooperate with the second sensing end are provided inside the housing 100. One of the second sensors is located in the middle of the housing 100 and is used to detect when the push head 413 of the push member 410 extends into place. The other second sensor is located at the tail of the housing 100 and is used to detect when the push head 413 of the push member 410 retracts into place.

[0064] In some embodiments, the traction mechanism 500 is located above the belt feeding mechanism 400 and is arranged along the length of the cylinder 110.

[0065] The traction mechanism 500 includes two rows of ratchet wheels 510 arranged in parallel on the ratchet support 530. Their arrangement direction is consistent with the length direction of the cylinder 110. The teeth of the two rows of ratchet wheels 510 together form a clamping surface for the cable tie. Furthermore, the surface of the cable tie may be provided with holes, teeth, or other structures to facilitate engagement or mechanical interlocking with the teeth of the ratchet wheels 510 with a high coefficient of friction.

[0066] The two rows of ratchet wheels 510 rotate synchronously and in opposite directions via a third power device 520 to move the cable tie. Furthermore, a guide roller is provided between adjacent ratchet wheels 510 in each row to guide the movement of the cable tie. At this time, the end of the cable tie passes through its locking hole and enters between the two rows of ratchet wheels 510. The teeth of the two rows of ratchet wheels 510 clamp the end of the cable tie, and the synchronous reversal of the two rows of ratchet wheels 510 causes the end of the cable tie to move towards the rear end of the cylinder 110 within the two rows of ratchet wheels 510, applying traction to the end of the cable tie and achieving tightening of the cable tie. Of course, in this way, after the ligature is tightened, the two rows of ratchet 510 can be reversed by the third power device 520. The teeth of the two rows of ratchet 510 drive the ligature to move from the two rows of ratchet 510 toward the front end of the cylinder 110, thereby causing the end of the ligature to exit from the front end of the two rows of ratchet 510, realizing the separation of the traction mechanism 500 from the ligature, so as to release the vascular tissue ligator.

[0067] Furthermore, the third power unit 520 includes a transmission gear 521, a third drive gear 522, and a third rotating mechanism 524. The third rotating mechanism 524 can be a stepper motor, servo motor, DC motor, etc., which can be selected according to actual needs. The transmission gear 521 is mounted on the ratchet 510, and the transmission gears 521 on two rows of ratchet 510 mesh. The third drive gear 522 is mounted on one row of ratchet 510 and rotates synchronously via a synchronous belt 523. One of the third drive gears 522 is fixed to the output end of the third rotating mechanism 524. At this time, the third rotating mechanism 524 drives one of the third drive gears 522 to rotate. Under the action of the synchronous belt 523, multiple third gears rotate synchronously, thereby driving one row of ratchet 510 to rotate synchronously. When this row of ratchet 510 rotates, it drives the other row of ratchet 510 to rotate synchronously in the opposite direction through the transmission gear 521, thus realizing the synchronous reverse rotation of the two rows of ratchet 510. The timing belt 523 can be a chain or a belt. Preferably, the timing belt 523 is provided with teeth that mesh with the transmission gear 521.

[0068] Furthermore, the ratchet support 530 is driven by the fourth power device 540 to move along the length of the cylinder 110. At this time, after the two rows of ratchet wheels 510 clamp the end of the cable tie, the fourth power device 540 drives the ratchet support 530 to move towards the rear end of the cylinder 110, thereby causing the two rows of ratchet wheels 510 clamping the end of the cable tie to retract synchronously. This also applies a traction force towards the rear end of the cylinder 110 to tighten the cable tie. Moreover, after the end of the cable tie separates from the traction mechanism 500, the fourth power device 540 can drive the ratchet support 530, the two rows of ratchet wheels 510, and the third power device 520 to retract as a whole to the rear end of the housing 100, making way for the material pushing mechanism to retract to the rear end of the housing 100.

[0069] Furthermore, the fourth power device 540 includes a second long rack 541, a fourth drive gear 542, and a fourth rotating mechanism 543. The fourth rotating mechanism 543 can be a stepper motor, servo motor, DC motor, etc., which can be selected according to actual needs. The second long rack 541 is disposed on the ratchet support 530, and the fourth drive gear 542 is connected to the output end of the fourth rotating mechanism 543 disposed in the housing 100. The fourth drive gear 542 meshes with the second long rack 541. Furthermore, the ratchet support 530 includes a first long plate 531 and a second long plate 532, which are arranged in parallel. Two rows of ratchet wheels 510 are located between the first long plate 531 and the second long plate 532. At this time, the gap between the first long plate 531, the second long plate 532, and the two rows of ratchet wheels 510 serves as a moving channel for the cable tie, and the gap between the two rows of ratchet wheels 510 is adapted to the width of the cable tie. Preferably, the first elongated plate 531 is located above the second elongated plate 532 and slides in cooperation with the strip-shaped guide groove on the cylinder 110. The second long rack 541 is disposed on the first elongated plate 531. The fourth rotating mechanism 543 drives the fourth driving gear 542 to rotate, and then the fourth driving gear 542 meshes with the second long rack 541 to drive the second long rack 541 to move along its axial direction, thereby driving the ratchet support member 530 fixed thereto to move, and then driving the ratchet support member 530, the two rows of ratchet wheels 510 and the third power device 520 to retract as a whole.

[0070] In some embodiments, the front end of the ratchet support 530 is further provided with a strap puller 550. The strap puller 550 is provided with a one-way locking hole 551. The one-way locking hole 551 is provided with a plurality of one-way locking teeth that cooperate with the slot area 11 of the cable tie. The one-way locking hole 551 and the through hole 414 on the pusher 410 are located on the same axis, and the outlet of the one-way locking hole 551 corresponds to the gap between the two rows of ratchet 510. In this manner, after the cable tie passes through its own locking hole, it enters the one-way locking hole 551 of the puller 550 and then enters between the two rows of ratchet 510. The puller 550 can restrict the movement direction of the cable tie. In conjunction with the locking hole of the cable tie, it improves the one-way locking effect of the cable tie and also prevents the cable tie from detaching from the puller 550 after it has passed through it. This ensures a stable connection between the cable tie and the puller 550 and prevents the cable tie from detaching from the traction mechanism 500 when traction force is applied to the cable tie.

[0071] In some embodiments, a cable tie cutting mechanism may be provided on the front side of the traction mechanism 500 for cutting off the excess portion after the cable tie is tightened. For example, a cutter may be provided in the puller 550, located on the front side of the one-way locking tooth. The cutter is fixed to the output end of the cutter drive mechanism, which may be an electric cylinder. The extension and retraction of the electric cylinder drives the extension and retraction of the cutter, causing the cutter to extend from the puller 550 into the one-way locking hole 551 to cut the cable tie. After the cable tie is cut, the puller 243 and the cable tie loop can be separated, releasing the vascular tissue ligator. At this time, the waste portion of the cable tie is located inside the traction mechanism 500. After the fourth power device 540 drives the two rows of ratchet wheels 510, the ratchet support 530, and the third power device 520 to retract as a whole to the rear end of the housing 100, the third power device 520 can drive the two rows of ratchet wheels 510 to rotate, causing the cable tie waste to be discharged from the rear end of the two rows of ratchet wheels 510.

[0072] Furthermore, a waste collection device can be provided at the rear end of the housing 100, as long as it enables the traction part 13 of the cable tie to be discharged from the pull ratchet 510 group and then discharged from the housing 100 or collected. For example, a waste discharge port can be provided at the rear end of the housing 100, which corresponds to the gap between the two rows of pull ratchet 510 groups, so that the traction part 13 can be discharged from the waste discharge port; a collection bag can also be provided at the rear end of the housing 100, the opening 251 of which corresponds to the rear end of the two rows of pull ratchet 510 groups when they are retracted to the rear end position of the housing 100, so that waste falls into the collection bag when discharged from the two rows of pull ratchet 510 groups.

[0073] The present invention also provides an embodiment of a ligature system.

[0074] Reference Figures 1 to 10 A ligation system includes the aforementioned vascular tissue ligator and vascular ligation band. The vascular ligation band is placed in the magazine 320 of the feeding mechanism. The vascular ligation band includes a body 10 and a locking part 20. Preferably, the body 10 and the locking part 20 are integrally formed. The ligation band is made of medical absorbable material or non-absorbable but non-rejectable material.

[0075] The body 10 has a strip-shaped structure and a slot area 11 extending along the length of the body 10. The body 10 includes a binding part 12 and a traction part 13. The opposing ends of the binding part 12 and the traction part 13 have connecting ribs 14. The connecting ribs 14 can be broken by external force to separate the binding part 12 from the traction part 13. A locking part 20 is provided at the end of the binding part 12 away from the traction part 13 and has a cable tie locking hole 21 through which the body 10 passes after being wound. Specifically, the cable tie locking hole 21 is provided with a stop member that cooperates with the slot area 11. Further, the stop member is provided on the bottom surface of the cable tie locking hole 21 and consists of multiple one-way teeth. When the body 10 passes into the cable tie locking hole 21, the one-way teeth engage with the slots in the slot area 11, causing the body 10 to move in one direction and achieving the tightening operation. Preferably, the binding part 12 and the locking part 20 are made of absorbable material, and the traction part 13 is made of plastic, which can save costs.

[0076] The locking mechanism between the ties and the locking part 20 utilizes the slot area 11 of the main body 10 and the ties locking hole 21 to unidirectionally lock the hemostatic ties. After the main body 10 is wound and tightened, the binding part 12 contacts the surface of the blood vessel. The slot area 11 on it increases the resistance between the binding part 12 and the blood vessel, preventing movement. Through the design of the connecting rib 14 on the main body 10, the binding part and the traction part 13 of the main body 10 can be torn apart, and the breakage point of the main body 10 can be controlled. Thus, the binding part 12 and the traction part can be separated by external force. The traction part 13 is separated. When the vascular ligature is placed in the magazine 320 of the feeding mechanism 300, it is pushed into the guide part of the cylinder by the feeding mechanism 300. The vascular ligature is fed into the ligature guide mechanism by the ligature feeding mechanism 400. Under the action of the ligature guide mechanism, the main body 10 is wound around the blood vessel to form a ligature loop. The traction part 13 passes through the locking hole on the locking part 20 and enters the traction mechanism 500. Then, the traction mechanism 500 pulls the traction part 13 of the vascular ligature to move it along the tightening direction to tighten the ligature loop. When the traction part 13 of the vascular ligature is continuously pulled, the locking part 20 of the vascular ligature is restricted by the pushing member 410, which can restrict the position of the ligature loop formed by the ligature. This causes the force between the traction part 13 and the locking part 20 to gradually increase, acting on the connecting rib 14 and breaking the connecting rib 14, which facilitates the precise separation of the excess part of the vascular ligature after ligation.

[0077] Furthermore, the end of the cable tie's traction portion 13 away from the binding portion 12 is provided with a guide portion 15. The width of the guide portion 15 at the end away from the traction portion 13 gradually decreases in the axial direction of the cable tie, forming a triangular shape, which facilitates guiding the traction portion 13 into the cable tie locking hole 21. A connecting portion 16 is provided between the binding portion 12 and the locking portion 20. The connecting portion 16 extends in an arc shape, with one end connected to the bottom of the locking portion 20 and the other end connected to the end of the binding portion 12 away from the traction portion 13. In this manner, the locking portion 20 protrudes from the body 10, facilitating the guide portion 15 to pass through the locking portion 20 after the body 10 is wound. Furthermore, the cable tie locking hole 21 on the locking portion 20 has a guide surface on the side facing the body 10, which facilitates guiding the guide portion 15 of the body 10 so that it can accurately enter the cable tie locking hole 21.

[0078] In use, initially, the pusher 410 and traction mechanism 500 retract to the rear end of the housing 100, exposing the guide portion 111 inside the cylinder 110, and the cable tie is placed into the magazine 320 of the feeding mechanism 300. When the front end of the vascular tissue ligator is inserted into the human body, the first rotating mechanism 242 rotates forward, causing the pull wire 243 to tighten on the tightening wheel 241, and causing the guide claws 210 to rotate around the fulcrum, opening the front ends of the two guide claws 210, which then clamp the blood vessel to be ligated. Afterward, the first rotating mechanism 242 rotates in the opposite direction, releasing the pull wire 243 from the tightening wheel 241. Under the action of the reset elastic member 230, the front ends of the two guide claws 210 close. At this time, the blood vessel is located between the two guide claws 210, and the cable tie guide grooves 215 on the two guide claws 210 are joined to form a guide channel for the cable tie to pass through.

[0079] Then, the linear drive mechanism 340 drives the pusher plate 330 to move radially along the cylinder 110, pushing the cable tie at the bottom of the magazine 320 into the guide part 111 of the cylinder 110, thereby realizing the automatic feeding of the cable tie.

[0080] The second rotating mechanism 423 starts and drives the first drive gear 422 to rotate, which in turn drives the push rod 411 to move towards the front end of the cylinder 110 within the guide part 111 via the first long rack 421. At the same time, the fourth rotating mechanism 543 starts and drives the fourth drive gear 542 to rotate, which drives the traction mechanism 500 to move forward as a whole via the second long rack 541. It can be understood that the feeding mechanism 400 and the traction mechanism 500 can operate synchronously or asynchronously, as long as the cable tie can enter between the two rows of ratchet 510 of the traction mechanism 500 after it has been wound around.

[0081] At this time, the pusher 413 pushes the cable tie to move towards the front end of the cylinder 110 within the guide section 111 until the traction section 13 of the cable tie enters the cable tie guide groove 215 of one of the guide claws 210 through the guide gap 214 at the rear end of the two guide claws 210. The pusher 413 continues to push the cable tie, which moves in the guide channel and passes through the guide channel. Under the guidance of the guide plate 216, it passes into the cable tie locking hole 21 on the locking section 20 of the cable tie. The body 10 of the cable tie is then wound up to form a ligature loop fitted on the blood vessel. The traction section 13 of the cable tie passes through the cable tie locking hole 21 and enters the one-way locking hole 551 of the puller 550, and then enters between the two rows of ratchet 510 of the traction mechanism 500.

[0082] Meanwhile, the pusher 413 pushes the locking part 20 of the cable tie from the guide gap 214 into the receiving space 213 between the two guide claws 210. The two rows of ratchet wheels 510 pull the traction part 13 of the cable tie, tightening the ligature formed after the cable tie is wound. The cable tie is squeezed out from the opening 251 on the flexible sleeve 250 until the blood vessel ligation is completed. Of course, at this time, the fourth drive gear 542 can also be driven to rotate by the fourth rotating mechanism 543, and the traction mechanism 500 can be driven to retract as a whole through the second long rack 541, thereby pulling the traction part 13 of the cable tie and tightening the ligature.

[0083] After the blood vessel ligation is completed, the pusher 413 abuts against the locking part 20 of the ligature, limiting the locking part 20. The fourth rotating mechanism 543 drives the fourth drive gear 542 to rotate, causing the traction mechanism 500 to retract as a whole, breaking the connecting rib 14 on the main body 10, thus separating the binding part 12 and the traction part 13 of the ligature. Of course, it is understandable that the traction part 13 can also be continuously pulled by the two rows of ratchet 510 to break the connecting rib 14, thus separating the blood vessel ligator from the binding part 12 of the ligature. The two can act alone or in combination.

[0084] Finally, rotate the guide claw 210 again, and the front ends of the two guide claws 210 open, which can release the blood vessel and remove the cylinder 110 from the human body, completing one blood vessel ligation.

[0085] After the binding part 12 and the traction part 13 of the cable tie are separated, the fourth rotating mechanism 543 drives the traction mechanism 500 to retract to the rear end of the housing 100. Then, the third rotating mechanism 524 drives the two rows of pull ratchet 510 to rotate, so that the separated traction part 13 can be discharged from between the two rows of pull ratchet 510.

[0086] By repeating the above steps, the blood vessel can be ligated multiple times.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 present 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vascular tissue ligator, characterized in that, include: A housing (100) is provided with a cylindrical body (110) and a guide portion (111) is provided inside the cylindrical body (110). A cable tie guiding mechanism (200) is located at the front end of the cylinder (110) and includes two sets of guide claws (210) with openable and closable front ends and guide gaps (214) at the rear ends. When closed, the two sets of guide claws (210) enclose a receiving space (213), and the cable tie guide grooves (215) on the two sets of guide claws (210) are connected to form a guide channel for the cable tie to pass through, and one of the cable tie guide grooves (215) is connected to the guide part (111). A feeding mechanism (300) is used to push cable ties into the guide section (111); The feeding mechanism (400) includes a pusher (410) movable in the axial direction of the cylinder (110), the front end of which can extend into the receiving space (213) through the guide gap (214); The traction mechanism (500) operably engages the end of the cable tie and applies a traction force to that end, causing it to displace in the tightening direction.

2. The vascular tissue ligator according to claim 1, characterized in that, The cable tie guiding mechanism (200) further includes: A support (220) is provided on the inner wall of the front end of the cylinder (110), wherein the rear end of at least one of the guide claws (210) is hinged to the support (220) and can rotate along the fulcrum by being driven by a first power device (240). A reset elastic element (230) is provided at the front end of the support (220). One end of the reset elastic element (230) abuts against the inner wall of the cylinder (110), and the other end abuts against the outer side of the guide claw (210).

3. The vascular tissue ligator according to claim 2, characterized in that, The first power unit (240) includes: A tensioning wheel (241) is disposed inside the housing (100) and driven to rotate by a first rotating mechanism (242); The pull line (243) is connected at one end to the tightening wheel (241) and at the other end to the outer wall of the guide claw (210), with the connection point located on the front side of the support (220).

4. The vascular tissue ligator according to claim 1, characterized in that, It also includes a flexible sleeve (250) fitted on the guide claw (210), and the flexible sleeve (250) has an opening (251) on the side near the receiving space (213).

5. The vascular tissue ligator according to claim 1, characterized in that, The feeding mechanism (300) is disposed within the housing (100) and includes: The support plate (310) extends through the feed inlet (112) on the cylinder (110) to the guide section (111). The magazine (320) has two side plates (321) and two end plates (322). The two end plates (322) are fixed to the support plate (310). The two side plates (321) are fixed to the two end plates (322) and have a gap between them and the support plate (310). The two side plates (321) are provided with guide plates (323) extending backward, wherein the guide plate (323) near the cylinder (110) extends through the feed port (112) to the guide section (111). A pusher plate (330) is movably disposed between the support plate (310) and the guide plate (323), and the pusher plate (330) is connected to the output end of the linear drive mechanism (340).

6. The vascular tissue ligator according to claim 1, characterized in that, The pusher (410) includes: Push rod (411) is slidably disposed in the guide part (111) and moved by the second power device (420). The front end of the push rod (411) is bent upward to form a limiting step (412). The back of the limiting step (412) can abut against the limiting block (113) at the front end of the cylinder (110). A pusher (413) is located at the front end of the push rod (411) and is adapted to the locking part of the cable tie. The thrust center line of the pusher (413) is collinear with the clamping center line of the traction mechanism (500).

7. The vascular tissue ligator according to claim 6, characterized in that, The second power unit (420) includes: The first long rack (421) is disposed on the push rod (411) and located in the rack guide groove (114) on the cylinder (110). The rack guide groove (114) is connected to the guide part (111) and separated by the limiting protrusion (115). The first drive gear (422) is disposed inside the housing (100) and meshes with the first long rack (421). The first drive gear (422) is connected to the output end of the second rotating mechanism (423).

8. The vascular tissue ligator according to claim 6, characterized in that, The pusher (413) has a through hole (414) for the cable tie to pass through. When the pusher (413) acts on the cable tie, the center line of the through hole (414) is collinear with the center line of the locking part of the cable tie.

9. The vascular tissue ligator according to claim 1, characterized in that, The traction mechanism (500) is located on the upper side of the feeding mechanism (400) and includes two rows of ratchet wheels (510) arranged in parallel on the ratchet support (530). The teeth of the two rows of ratchet wheels (510) together form a clamping surface for the cable tie. The two rows of ratchet wheels (510) are synchronously and in opposite directions rotated by a third power device (520) to pull the cable tie. The ratchet support (530) is driven by a fourth power device (540) to move along the length direction of the cylinder (110).

10. The vascular tissue ligator according to claim 9, characterized in that, The third power unit (520) includes: A transmission gear (521) is provided on the ratchet (510) and the two rows of transmission gears (521) on the ratchet (510) mesh with each other; The third drive gear (522) is mounted on one of the ratchet (510) and rotates synchronously via a timing belt (523), wherein one of the third drive gears (522) is fixed to the output end of the third rotating mechanism (524).

11. The vascular tissue ligator according to claim 9, characterized in that, The fourth power unit (540) includes: The second long rack (541) is provided on the ratchet support (530). The fourth drive gear (542) is connected to the output end of the fourth rotating mechanism (543) located in the housing (100), and the fourth drive gear (542) meshes with the second long rack (541).

12. The vascular tissue ligator according to claim 9, characterized in that, The front end of the ratchet support (530) is also provided with a puller (550), and the puller (550) is provided with a one-way locking hole (551). The one-way locking hole (551) and the through hole (414) on the pusher (410) are located on the same axis, and the outlet of the one-way locking hole (551) corresponds to the gap between the two rows of ratchet (510).

13. The vascular tissue ligator according to claim 9, characterized in that, The exit side of the guide channel is provided with a guide piece (216) that extends downward at an angle away from the receiving space (213).

14. A cable tie ligation system, characterized in that, Including the vascular tissue ligator and vascular band as described in any one of claims 1-13, The vascular ligature is placed in the magazine compartment (320) of the feeding mechanism (300). The vascular ligature includes a body (10) and a locking part (20). The body (10) is a strip-shaped structure and has a slot area (11) extending along the length direction of the body (10). The body (10) includes a binding part (12) and a traction part (13). The opposite ends of the binding part (12) and the traction part (13) have connecting ribs (14). The connecting ribs (14) can be broken by external force. The locking part (20) is located at the end of the binding part (12) away from the traction part (13) and has a ligature locking hole (21) through which the body (10) passes after being wound.

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