Suturing system

Abstract

The invention relates to the field of suturing systems of medical instruments, and discloses a suturing system. The suturing system includes a control handle, a tube, a receiving cartridge, and a needle. The control handle comprises a shell, a driving mechanism and a rotation indicating piece, the rotation indicating piece is rotatably connected to the shell, and a plurality of position marks are arranged on the periphery of the shell. An actuating shaft in the driving mechanism is coupled to a first gear, an actuating pipe is coupled to a second gear, and the first gear and the second gear are arranged in the longitudinal direction and rotate synchronously. When the rack moves longitudinally, the conversion gear can be driven to rotate so as to drive the first gear to rotate, and the first gear and the second gear respectively drive the actuating shaft and the actuating tube to do longitudinal reciprocating motion, so that the needle is alternately combined with the actuating tube and the receiving bin. The driving mechanism in the sewing system is reliable in structure, and the failure rate can be effectively reduced. In addition, the rotation indicating piece is used in cooperation with a position mark arranged on the shell so that the positions of the shell and the driving mechanism after rotation can be indicated, and operation is convenient.

Description

Technical Field

[0001] This invention relates generally to the field of suture systems for medical devices, and more specifically to a suture system for suturing blood vessels. Background Technology

[0002] In recent years, with the increasing size of equipment required for interventional procedures, the requirements for the diameter of the arterial incision for vascular access have also increased accordingly. For example, procedures such as transcatheter aortic valve implantation (TAVI), endovascular aortic aneurysm repair (EVAR), percutaneous ventricular assist device (VAD) implantation, and balloon aortic valve repair (BAV) typically require 10 to 25F puncture sheaths, thus necessitating larger diameter vascular access routes. Complications caused by poor closure of vascular access wounds are common, including luminal stenosis, pseudoaneurysms, hematomas, bleeding, and vagal reflexes, and in severe cases, even arteriovenous fistulas or thromboembolisms. Therefore, reliable suturing of large-diameter vessels is crucial. Vascular suturing systems, as local closure devices targeting the puncture site, can effectively reduce vascular damage and improve suturing outcomes. However, existing suturing systems generally suffer from cumbersome operation, high failure rates, and are mostly only suitable for small-diameter vessels, limiting their application scope.

[0003] Furthermore, when suturing a wound, a needle guide suture needs to pass through each suture point. When using a suturing system, the operator needs to rotate the needle-related components (e.g., the drive mechanism) to different angles to ensure the needle passes through the desired suture point. In existing technology, the operator is often used as a reference point to determine the rotation angle of the drive mechanism, which is highly demanding on the operator, difficult to operate, and prone to errors. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this disclosure provides a suturing system that includes a rotation indicator, which is easy to operate and easy to judge the rotation angle of the drive mechanism, etc., and is less prone to errors.

[0005] The suture system disclosed herein includes a control handle, a tube, a receiving chamber, and a needle. The control handle includes a housing, a drive mechanism, and a rotation indicator. The housing has several position markers on its outer periphery. The drive mechanism includes a first gear, a second gear, and a third gear rotatably fixed to the housing. The first and second gears are arranged longitudinally, and the second gear rotates synchronously with the first gear via the third gear. A conversion gear and a rack extending longitudinally are disposed within the housing. The conversion gear is fixed to and coaxially arranged with the first gear. The rack is configured to drive the conversion gear to rotate, thereby rotating the first gear, when moved longitudinally. An actuation shaft and an actuation tube extend longitudinally. The actuation shaft is disposed within the actuation tube, and the distal ends of both the actuation shaft and the actuation tube extend outside the housing. The actuation shaft is coupled to the first gear, and the actuation tube is coupled to the second gear. When the first and second gears rotate, the first gear drives the actuation shaft to reciprocate longitudinally, and the second gear drives the actuation tube to reciprocate longitudinally. The rotation indicator is rotatably connected to the housing and has rotation marks. The tube is fixed to the housing and has a channel suitable for accommodating the actuating tube. A receiving chamber is coupled to the distal end of the tube and is configured to engage with a needle. The distal end of the actuating tube is configured to engage with the needle, and when the rack moves longitudinally, the first gear and the second gear drive the actuating shaft and the actuating tube to reciprocate longitudinally, thereby alternately engaging the needle with the actuating tube and the receiving chamber. When the housing is rotated, the receiving chamber rotates synchronously, and several position markers and rotation marks indicate the positions of the housing and the receiving chamber.

[0006] Specifically, a rotating indicator is disposed at the proximal end of the housing, and a connecting tooth is provided on the distal end face of the rotating indicator. The connecting tooth is configured to include a thin portion and a connecting block arranged longitudinally, with the connecting block located distal to the thin portion. An annular connecting groove is provided on the proximal end face of the housing, and the annular connecting groove is configured to include a narrow portion and a wide portion that communicate with each other. The wide portion is configured to accommodate the connecting block, and the narrow portion is configured to accommodate the thin portion. The connecting block is configured not to enter the narrow portion.

[0007] Optionally, the housing includes an enclosable first housing and a second housing, and the connecting teeth are configured to be a plurality of connecting teeth arranged at circumferential intervals, wherein the sum of the angles of the plurality of connecting teeth is less than or equal to 180°.

[0008] Specifically, one of the housing and the rotation indicator is provided with a rotation limiting block, and the other is provided with a rotation limiting groove. When the housing is rotated to align one of the position marks with the rotation mark, the rotation limiting block is located in the rotation limiting groove.

[0009] Specifically, the rotation limiting grooves are configured as a plurality of rotation limiting grooves located at the ends of the housing, and each rotation limiting groove is aligned with a position mark. A rotation limiting block is located on the proximal end face of the rotation indicator, and the radially rotating limiting block is located outside the connecting teeth, and the rotation limiting block is aligned with the rotation mark. The rotation limiting block is configured as a strip-shaped protrusion extending along the height direction of the control handle, and the rotation limiting groove is configured to accommodate the rotation limiting block. More specifically, the position marks include numerical marks and rotation direction marks, with adjacent position marks spaced 30° apart.

[0010] Optionally, the conversion gear is configured as a half gear, and the rack is configured as a first rack and a second rack. The first rack has a proximal initial position, and the second rack has a distal initial position. The first rack and the second rack alternately drive the half gear to rotate, and each alternation drives the half gear to rotate one revolution. The drive mechanism also includes a longitudinally extending drive rod, which is configured to move linearly between a first position and a second position. When the drive rod moves from the first position to the second position, it moves the first rack from the proximal initial position to the distal position, causing the first rack to drive the half gear to rotate. When the drive rod moves from the second position to the first position, it moves the second rack from the distal initial position to the proximal position, causing the second rack to drive the half gear to continue rotating. One revolution of the first gear causes the actuation shaft to reciprocate once, and one revolution of the second gear causes the actuation tube to reciprocate once. The proximal end of the drive rod extends outside the housing; the rotating indicator includes a longitudinally extending indicator body and a wing-shaped grip portion disposed on the outer periphery of the indicator body, and a longitudinally extending third through hole is provided in the middle of the indicator body, through which the drive rod extends.

[0011] Optionally, in some embodiments, the distal end of the tube is provided with a receiving chamber receiving portion adapted to accommodate a receiving chamber. The receiving chamber is rotatably connected to the tube and includes a needle receiving portion configured to engage with a needle; wherein the receiving chamber has an extension position and a mating position; when the receiving chamber is in the extension position, it is located within the receiving chamber receiving portion; when the receiving chamber is rotated to the mating position, the needle receiving portion of the receiving chamber is located outside the tube. The control handle also includes a receiving chamber drive mechanism coupled to the receiving chamber, configured to switch the receiving chamber between the extension position and the mating position.

[0012] Specifically, the receiving compartment drive mechanism includes a wrench, a drive block, and a drive cable. The wrench is rotatably connected to the housing, the drive block is coupled to the wrench, and the drive cable is connected to the drive block and the receiving compartment. The wrench has a closed position and an open position, and can be rotatably switched between these two positions. When the wrench switches from the closed position to the open position, it moves the drive block and drive cable proximally, thereby driving the receiving compartment from an extended position to a mating position. When the wrench switches from the open position to the closed position, it moves the drive block and drive cable distally, thereby driving the receiving compartment from a mating position to an extended position.

[0013] The features and advantages of this disclosure include:

[0014] The suture system disclosed herein includes a control handle, a tube, a receiving chamber, and a needle. The control handle includes a housing, a drive mechanism, and a rotation indicator. Several position markers are provided on the outer periphery of the housing. An actuation shaft in the drive mechanism is coupled to a first gear, and an actuation tube is coupled to a second gear. When the drive rack moves longitudinally, it drives a conversion gear to rotate, which in turn drives the first gear to rotate. The first and second gears are arranged longitudinally, and the second gear rotates synchronously with the first gear via a third gear. The distal end of the actuation tube is configured to engage the needle. When the rack moves longitudinally, the first and second gears respectively drive the actuation shaft and actuation tube to reciprocate longitudinally, thereby alternately engaging the needle with the actuation tube and the receiving chamber. When the housing is rotated, the receiving chamber rotates synchronously. The position markers and rotation indicators indicate the positions of the housing and the receiving chamber.

[0015] The drive mechanism in the suturing system disclosed herein has a reliable structure, which can effectively reduce the failure rate. In addition, when using the suturing system disclosed herein, the operator only needs to hold the rotation indicator with one hand and rotate the housing and drive mechanism with the other hand. The rotation indicator, in conjunction with the position mark set on the housing, can indicate the position of the housing and drive mechanism after rotation. The operation is convenient and it is easy to judge the rotation angle of the drive mechanism, etc., and it is not easy to make mistakes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional schematic diagram of the suturing system of this disclosure is shown, wherein the wrench is in the closed position;

[0018] Figure 2A perspective view of the suturing system of this disclosure is shown, wherein the wrench is in the open position;

[0019] Figure 3 An exploded view of a portion of the control handle of the suturing system of this disclosure is shown;

[0020] Figure 4 A top view of the control handle of this disclosure is shown, wherein the first housing has been removed;

[0021] Figure 5 A three-dimensional schematic diagram of the drive mechanism of this disclosure is shown, wherein the motion conversion mechanism is removed;

[0022] Figure 6 A schematic diagram of the suturing system of this disclosure is shown, wherein the receiving chamber is located in the extended position, the needle is engaged with the actuation tube, and the actuation shaft and the actuation tube are located inside the tube;

[0023] Figure 7 A schematic diagram of the suturing system of this disclosure is shown, wherein the receiving chamber is rotated to the mating position, the needle engages with the actuation tube, and the actuation shaft and the actuation tube are located inside the tube;

[0024] Figure 8 A schematic diagram of the suturing system of this disclosure is shown, wherein the receiving chamber is located in the mating position, and the actuation shaft and actuation tube move to the distal end to engage with the receiving chamber;

[0025] Figure 9 A schematic diagram of the suturing system of this disclosure is shown, wherein the receiving chamber is located in the mating position, the needle is engaged with the receiving chamber, and the actuation shaft and actuation tube move proximally into the tube;

[0026] Figure 10 A schematic diagram of the suturing system of this disclosure is shown, wherein the receiving chamber is located in the mating position, the needle is engaged with the receiving chamber, and the actuation shaft and actuation tube move distally;

[0027] Figure 11 The longitudinal movement distance of the actuator tube and actuator shaft of this disclosure is shown;

[0028] Figure 12 It shows the basis Figure 1 A 3D diagram showing the control handle after rotating 180°.

[0029] Figure 13 It shows Figure 12 The diagram shows a partial exploded view of the control handle.

[0030] Figure 14 It shows Figure 12 The diagram shown is a top view of the control handle, with the second housing removed.

[0031] Figure 15A three-dimensional schematic diagram of the motion conversion mechanism is shown;

[0032] Figure 16 A three-dimensional schematic diagram of the half gear and the first gear of this disclosure is shown;

[0033] Figure 17 A three-dimensional schematic diagram of the first and second racks of this disclosure is shown;

[0034] Figure 18 Another perspective view of the first and second racks of this disclosure is shown;

[0035] Figure 19 A perspective view of the connecting block and drive rod of this disclosure from the near end to the far end is shown;

[0036] Figure 20 A perspective view of the connecting block and drive rod of this disclosure from the far end to the near end is shown;

[0037] Figure 21 The movement of each component of the drive mechanism of this disclosure is shown when the drive lever moves linearly from the first position to the second position;

[0038] Figure 22 The movement of each component of the drive mechanism of this disclosure is shown when the drive lever moves linearly from the second position to the first position;

[0039] Figure 23 A schematic diagram is shown where the second rack is separated from the connecting block when the drive rod is in the first position;

[0040] Figure 24 It shows Figure 12 The diagram shown is a top view of the control handle, with part of the drive mechanism removed.

[0041] Figure 25 It shows Figure 12 The diagram shows a three-dimensional representation of the control handle, with some of the drive mechanism removed.

[0042] Figure 26 It shows Figure 12 A schematic diagram of the receiving compartment drive mechanism of the control handle shown.

[0043] Figure 27 An exploded view of the receiving chamber drive mechanism of this disclosure is shown, wherein the observation direction is from the far end toward the near end;

[0044] Figure 28 An exploded view of the receiving chamber drive mechanism of this disclosure is shown, wherein the observation direction is from the near end to the far end;

[0045] Figure 29 It shows Figure 12 The diagram shows the receiving compartment drive mechanism and receiving compartment of the control handle. The solid line in the diagram indicates that the receiving compartment is in the extended position when the wrench is in the closed position, and the dashed line indicates that the receiving compartment is in the mating position when the wrench is in the open position.

[0046] Figure 30 A schematic diagram of the rotary indicator of this disclosure is shown;

[0047] Figure 31 A schematic diagram of the suturing system of this disclosure is shown from the proximal end to the distal end, with the drive rod and rotation indicator removed;

[0048] Figure 32 A schematic diagram of vascular suturing using the suturing system of this disclosure is shown;

[0049] Figure 33 A commonly used suture path diagram of the suture system of this disclosure is shown. Detailed Implementation

[0050] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0051] The suturing system provided by this invention can be used to suture various tissues in the human body, especially cavity-type tissues such as the intestines, stomach, urethra, and blood vessels. This suturing system is particularly suitable for closing vascular access wounds after endovascular interventional procedures, and is especially suitable for treating large vascular wounds, such as those left after puncturing blood vessels with a 10-25F medical device. The following explanation will use vascular suturing as an example.

[0052] In this disclosure, "proximal" refers to the side closer to the surgeon, and "distal" refers to the side closer to the surgical target location.

[0053] See Figure 1 , Figure 2 The suture system 40 disclosed herein includes a receiving chamber 440, a control handle 10, and a needle 43. The receiving chamber 440 is located distal to the control handle 10. By operating the control handle 10, the needle 43 can be placed in or removed from the receiving chamber 440, thereby completing the movement of the needle 43 in the tissue, which can drive the needle 43 to move through the tissue. Figures 6 to 10 The suture 46 shown is used to suture the tissue.

[0054] Specifically, see Figures 1 to 10The control handle 10 is provided with a drive mechanism 20, which includes an independently controllable, longitudinally extending actuation shaft 28 and an actuation tube 29, with the actuation shaft 28 longitudinally movably disposed within the actuation tube 29. The distal end of the actuation shaft 28 is configured to abut against the proximal end of the needle 43, thereby allowing the needle 43 to alternately engage with the actuation tube 29 and the receiving chamber 440. In some embodiments, the distal end of the actuation shaft 28 is also configured to have a pointed shape, which facilitates the actuation shaft 28's easy passage through tissue when the needle 43 is engaged with the receiving chamber 440. The distal end of the actuation tube 29 is configured to accommodate the needle 43, and the receiving chamber 440 is provided with a needle receiving portion 441 suitable for accommodating the needle 43. Operating the control handle 10 allows the actuation shaft 28 and the actuation tube 29 to reciprocate longitudinally, thereby placing or removing the needle 43 from the receiving chamber 440. In the reciprocating motion, the actuation shaft 28 can move a first longitudinal distance, and the actuation tube 29 can move a second longitudinal distance, with the first longitudinal distance being greater than the second longitudinal distance.

[0055] Specifically, see Figure 6 Both the actuator tube 29 and the actuator shaft 28 are located proximally. The proximal end of the needle 43 is located within the actuator tube 29 (i.e., the needle 43 is engaged with the actuator tube 29), while the distal end of the actuator shaft 28 is located within the actuator tube 29 and is not in contact with the needle 43. See also Figure 8 The control handle is operated to move the actuator tube 29 and actuator shaft 28 longitudinally to a distal position. The needle 43 follows the actuator tube 29 longitudinally to the needle receiving portion 441 of the receiving chamber 440. Since the first longitudinal distance moved by the actuator shaft 28 is greater than the second longitudinal distance moved by the actuator tube 29, the actuator shaft 28 moves distally relative to the actuator tube 29, thereby abutting the proximal end of the needle 43, causing the needle 43 to disengage from the actuator tube 29 and engage with the needle receiving portion 441. (See also...) Figure 9 Operating the control handle moves the actuator tube 29 and actuator shaft 28 longitudinally from the distal position to the proximal position, completely separating the actuator tube 29 from the needle 43, which then remains in the receiving chamber 440. (See also...) Figure 10 Then, operate the control handle again to move the actuator tube 29 and actuator shaft 28 longitudinally from the proximal position to the distal position. The distal end of the actuator shaft 28 abuts against the proximal end of the needle 43, thereby disengaging the needle 43 from the receiving chamber 440 and engaging it with the actuator tube 29. Operate the control handle again to move the actuator tube 29 and actuator shaft 28 longitudinally to the proximal position. The needle 43 follows the actuator tube 29 to move proximally, while the actuator shaft 28 moves proximally relative to the actuator tube 29 and needle 43 until the actuator shaft 28 separates from the needle 43. Figure 6 As shown. See also Figure 11 The actuation shaft 28 moves a first longitudinal distance of X1, and the actuation tube 29 moves a second longitudinal distance of X2, where X1 is greater than X2. Furthermore, as the needle 43 moves within the tissue, the suture 46 follows the movement of the needle 43, thereby suturing the tissue.

[0056] See also Figures 1 to 10 The control handle 10 includes a housing 100 configured to accommodate a drive mechanism 20, an actuation shaft 28, and an actuation tube 29 extending distally from the housing 100. In some embodiments, the suture system 40 includes a tube 41, the proximal end of which is fixed to the distal end of the housing 100, and the tube 41 having a longitudinal channel adapted to accommodate the actuation tube 29. When the actuation tube 29 and the actuation shaft 28 are in the proximal position, the distal ends of both the actuation tube 29 and the actuation shaft 28 are accommodated within the tube 41; when the control handle is operated to move the actuation tube 29 and the actuation shaft 28 longitudinally to the distal position, the distal ends of both the actuation tube 29 and the actuation shaft 28 protrude outside the tube 41. In some embodiments, the distal end of the tube 41 is provided with an access sheath 42, which is rotatably connected to the tube 41. The access sheath 42 is configured to be suitable for accessing the lumen of human tissue, such as a blood vessel. Optionally, in some embodiments, see [link to relevant documentation]. Figure 3 The control handle 10 is provided with an outlet vessel 47, which is connected to the longitudinal channel of the tube 41 that accommodates the actuator tube 29.

[0057] Specifically, the distal end of the tube 41 is provided with a receiving compartment 41a that can accommodate a receiving compartment 440, and the receiving compartment 440 is rotatably connected to the tube 41. The receiving compartment 440 has an extension position and a mating position. The tube 41 has an opening at the receiving compartment 41a, such that when the receiving compartment 440 is in the mating position, the receiving compartment 441 is outside the tube 41. When the receiving compartment 440 is in the extension position, the receiving compartment 440 is located inside the receiving compartment 41a of the tube 41, and the extension direction of the receiving compartment 440 is approximately the same as the extension direction of the tube 41. When the receiving compartment 440 is in the mating position, the extension direction of the receiving compartment 440 is approximately perpendicular to the extension direction of the tube 41, and the extension direction of the receiving compartment 41a is approximately the same as the extension direction of the tube 41. The receiving compartment 41a is adapted to accommodate the receiving compartment 440.

[0058] Specifically, see Figure 1 , Figure 2 , Figure 6The receiving chamber 440 is provided with a mating hole 442, and the distal end of the tube 41 is provided with a receiving chamber connecting shaft 45. The receiving chamber connecting shaft 45 extends through the mating hole 442, so that the receiving chamber 440 is rotatably connected to the tube 41. The control handle 10 is provided with a receiving chamber drive mechanism 300, which is used to drive the receiving chamber 440 to rotate, so that the receiving chamber 440 can switch between an extended position and a mating position. More specifically, the receiving chamber drive mechanism 300 includes a wrench 301 and a drive cable 302. The wrench 301 is rotatably disposed in the housing 100 of the control handle. The proximal end of the drive cable 302 is coupled to the wrench 301, and the distal end of the drive cable 302 is connected to the receiving chamber 440. The tube 41 is provided with a channel suitable for the drive cable to extend through. The wrench 301 has a closed position (OFF) and an open position (ON). When the operator drives the wrench 301 to rotate, the wrench 301 drives the drive cable 302 to move, which in turn drives the receiving chamber 440 to rotate around the receiving chamber connecting shaft 45. See Figure 2 When the wrench 301 is turned to the open position, the corresponding receiving compartment 440 is in the mating position; see also Figure 1 When the wrench 301 is turned to the closed position, the corresponding receiving compartment 440 is in the extended position.

[0059] See Figures 6 to 10 The following section, using the suture system 40 as an example, details the movement of components related to the movement of the needle 43. Figure 6 In the middle, wrench 301 is located Figure 1 In the closed position shown, the receiving chamber 440 is in the extended position, located within the receiving chamber receiving portion 41a of the tube 41. The distal ends of both the actuation shaft 28 and the actuation tube 29 are located within the tube 41. The needle 43 is engaged with the actuation tube 29 but not in contact with the distal end of the actuation shaft 28. See next... Figure 7 The operator drives the wrench 301 to rotate to Figure 2 In the open position shown, the wrench 301 drives the receiving chamber 440 to rotate to the mating position via the drive line 302. Then refer to... Figure 8 The operator drives the control handle 10 to move the actuator tube 29 and actuator shaft 28 from the proximal position to the distal position. The actuator tube 29 moves the needle 43 to the needle receiving portion 441 of the receiving chamber 440, and the needle 43 is disengaged from the actuator tube 29 under the pushing action of the actuator shaft 28. See next... Figure 9 The operator drives the control handle 10 to move the actuator tube 29 and actuator shaft 28 from the distal position to the proximal position. The distal ends of both the actuator shaft 28 and actuator tube 29 return to the tube 41, and the needle 43 remains in the receiving chamber 440. Next, the operator can operate the control handle 10 and the tube 41 to rotate relative to the tissue in the target direction. See also... Figure 10The actuator tube 29 and actuator shaft 28 are moved distally so that the actuator shaft 28 abuts against the needle 43 and the distal end of the actuator tube 29 engages with the needle 43, thereby removing the needle 43 from the receiving chamber 440. Next, the actuator tube 29 and actuator shaft 28 are moved proximally until... Figure 6 As shown.

[0060] See also Figures 1 to 3 The housing 100 of this disclosure includes a first housing 110, a second housing 120, and a distal housing 101. The first housing 110 and the second housing 120 are configured as two half-housings, each divided by a cylindrical housing, forming a cylindrical shape. The distal housing 101 is connected to the distal ends of the first housing 110 and the second housing 120. In some embodiments, the distal housing 101 is configured to accommodate the distal ends of the first housing 110 and the second housing 120. Specifically, the outer contour of the transverse cross-section of the distal housing 101 gradually decreases from the proximal side to the distal side; for example, the cross-section is configured as a circle, and the radius of the circle gradually decreases from the proximal side to the distal side. In some embodiments, the distal housing 101 is composed of a portion of the first housing 110 and a portion of the second housing 120. The first housing 110 has a plurality of first connecting posts 114, and the second housing 120 has a plurality of second connecting posts 121 adapted to mate with the first connecting posts 114. The first connecting posts 114 and the second connecting posts 121 can be engaged by means of posts and holes.

[0061] See Figures 3 to 5 The drive mechanism 20 includes a first gear 21, a second gear 23, and a third gear 25. The first gear 21 and the second gear 23 are arranged longitudinally, and the third gear 25 meshes with both the first gear 21 and the second gear 23. The second gear 23 rotates synchronously with the first gear 21 via the third gear 25. An actuation shaft 28 is coupled to the first gear 21, and its rotation drives the actuation shaft 28 to move axially (longitudinally). An actuation tube 29 is coupled to the second gear 23, and its rotation drives the actuation tube 29 to move axially (longitudinally). Operating the control handle 10 rotates the first gear 21, causing the second gear 23 to rotate synchronously, thereby moving the actuation shaft 28 and the actuation tube 29 longitudinally. In some embodiments, the first gear 21 and the second gear 23 rotate in one direction by an angle (less than or equal to 180°), and then rotate in the other direction by the same angle, causing the actuation shaft 28 and the actuation tube 29 to reciprocate once. In other embodiments, when the first gear 21 and the second gear 23 rotate one revolution, the actuation shaft 28 and the actuation tube 29 reciprocate once.

[0062] Specifically, the drive mechanism 20 includes a first slider 26 and a second slider 27 arranged axially, with the first slider 26 located near the second slider 27. An actuation shaft 28 is connected to the first slider 26, and an actuation tube 29 is connected to the second slider 27. The first slider 26 and the second slider 27 are configured to be coupled to a first gear 21 and a second gear 23, respectively, and reciprocate axially under the rotation of the first gear 21 and the second gear 23. See also... Figure 3 and Figure 4 The control handle 10 is provided with a longitudinally extending slider guide rail 116, and a first slider 26 and a second slider 27 are connected to the slider guide rail 116. The first slider 26 is provided with a first coupling hole 26a, and a first coupling protrusion 22 is provided on the side of the first gear 21 near the first slider 26, extending to the first coupling hole 26a. The second slider 27 is provided with a second coupling hole 27a, and a second coupling protrusion 24 is provided on the side of the second gear 23 near the second slider 27, extending to the second coupling hole 27a. When the first gear 21 rotates, the first coupling protrusion 22 rotates synchronously with the first gear 21. The rotating first gear 21 contacts the wall of the first coupling hole 26a, thereby pushing the first slider 26 to move, and the first slider 26 reciprocates along the slider guide rail 116 under the constraint of the slider guide rail 116. Similarly, the second gear 23 rotates synchronously with the first gear 21, and the second slider 27 reciprocates along the slider guide rail 116 under the pushing action of the second coupling protrusion 24 and the constraint of the slider guide rail 116. The outer contours of the first coupling bump 22 and the second coupling bump 24 can be constructed into any shape, such as a circle, ellipse, fan, Reuleaux triangle, or square, as long as they are suitable for mating with the first coupling hole 26a and the second coupling hole 27a. When the coupling hole is fixed, the moving speed of the coupling bump at each stage of the lateral movement is related to the shape of the outer contour.

[0063] Specifically, see [link to relevant documentation] Figure 5The first slider 26 includes a first slider body 26d, which is constructed as a flat plate and has a first coupling hole 26a. The first coupling hole 26a is constructed as a rectangular hole, and its lateral length is greater than its longitudinal length. First vertical plates 26e extending longitudinally are respectively provided on both sides of the first slider body 26d, and first slider limiting grooves 26c extending longitudinally are provided on the first vertical plates 26e. The first slider limiting grooves 26c are used to cooperate with the slider guide rail 116 disposed in the first housing 110, limiting the first slider 26 to move only longitudinally. The first slider 26 also includes an actuation shaft seat 26b disposed in the first slider body 26d, wherein the actuation shaft seat 26b and the first coupling hole 26a are arranged longitudinally, and the actuation shaft seat 26b is located on the far side of the first coupling hole 26a. The actuation shaft seat 26b is used to connect to the actuation shaft 28, so that the actuation shaft 28 can be located at the axial position of the control handle. The actuation shaft seat 26b, which moves longitudinally in a reciprocating motion, can drive the actuation shaft 28 to move synchronously. Specifically, the actuation shaft 28 can be connected to the actuation shaft seat 26b by means of bonding or other methods.

[0064] Specifically, the second slider 27 includes a second slider body 27d, a second coupling hole 27a, a second vertical plate 27e, a second slider limiting groove 27c, and an actuation tube seat 27b, which is used to connect the actuation tube 29. The structure of the second slider 27 is basically similar to that of the first slider 26, and the specific structure of the second slider 27 can be referred to that of the first slider 26, which will not be repeated here. In particular, the actuation tube seat 27b is configured to have a T-shaped connecting groove, and the proximal end of the actuation tube 29 is provided with a connecting part 31. The connecting part 31 can be disposed in the T-shaped connecting groove, that is, the actuation tube 29 and the actuation tube seat 27b are connected through the connecting part 31 and the T-shaped connecting groove. Specifically, the connecting part 31 can be configured as T-shaped or I-shaped, etc., with one end placed in the T-shaped connecting groove and the other end suitable for connecting the actuation tube 29.

[0065] Specifically, the distance between the center of the first coupling protrusion 22 and the center of the first gear 21 is greater than the distance between the center of the second coupling protrusion 24 and the center of the second gear 23, and the lateral length of the first coupling hole 26a is greater than the lateral length of the second coupling hole 27a. This results in the longitudinal movement distance of the first slider 26 being greater than the longitudinal movement distance of the second slider 27 when the first gear 21 and the second gear 23 rotate synchronously, which in turn causes the movement distance of the actuation shaft 28 to be greater than the movement distance of the actuation tube 29. The distance between the center of the first coupling protrusion 22 and the center of the first gear 21 is half of the first longitudinal distance, and the distance between the center of the second coupling protrusion 24 and the center of the second gear 23 is half of the second longitudinal distance.

[0066] In some embodiments, the outer contour of the first coupling bump 22 is configured as a fan shape, and the outer contour of the second coupling bump 24 is configured as a circle, which is more conducive to matching the movement requirements of the actuator tube and the actuator shaft.

[0067] Specifically, the first gear 21 can be driven to rotate in any way, for example, by a motor. See also... Figures 12 to 15 In some embodiments, the drive mechanism 20 includes a motion conversion mechanism 200, which has an input end and an output end. The motion conversion mechanism 200 can convert linear motion at the input end into rotational motion at the output end. The output end of the motion conversion mechanism 200 is connected to the first gear 21. When using the sewing system, driving the input end of the motion conversion mechanism 200 to make linear motion will cause the first gear 21 to rotate.

[0068] Specifically, in some embodiments, the motion conversion mechanism 200 includes a rack and a conversion gear. The input end is coupled to the rack, and the output end is the conversion gear, which is directly or indirectly connected to the first gear 21. When the conversion gear is directly connected to the first gear 21, the conversion gear and the first gear 21 are arranged coaxially, allowing them to rotate synchronously. When the rack meshes with the conversion gear, the input end drives the rack to perform linear motion, which in turn drives the conversion gear to rotate. More specifically, in some embodiments, when the input end drives the rack to perform linear reciprocating motion, the conversion gear can rotate alternately in two directions. For example, the rack is configured as a single unit, and the conversion gear is configured as a half gear or a full gear. When the rack meshes with the conversion gear, the rack moves from the proximal end to the distal end, driving the conversion gear to rotate 180° in a first direction; the rack moves from the distal end to the proximal end, driving the conversion gear to rotate 180° in a second direction, which is opposite to the first direction.

[0069] In other embodiments, when the rack makes a linear reciprocating motion, the conversion gear rotates in the same direction. Specifically, the rack is constructed as two gears, and the conversion gear is constructed as a half-gear 230, which is connected to the first gear 21 and arranged coaxially. One side of the outer periphery of the half-gear 230 is provided with engagement teeth suitable for engaging with the rack. See also... Figures 13 to 15 The motion conversion mechanism 200 includes a first rack 210, a second rack 220, a half gear 230, and a drive rod 240. (See also...) Figure 21 The first rack 210 and the second rack 220 extend longitudinally, with the first rack 210 having a proximal initial position and the second rack 220 having a distal initial position. A half-gear 230 is located between the first rack 210 and the second rack 220, and the first rack 210 and the second rack 220 can alternately drive the half-gear 230 to rotate. The proximal end of the drive rod 240 is the input end of the motion conversion mechanism 200, and the second rack 220 is triggerably connected to the drive rod 240.

[0070] Specifically, see Figure 15The drive rod 240 is configured as a longitudinally extending column, and the cross-section of its main body can be configured in any shape. Specifically, the cross-section of the main body of the drive rod 240 is configured as a cross shape. In some embodiments, a handle 242 is provided at the proximal end of the main body of the drive rod 240, and the handle 242 is configured to be easy to press and grip. The drive rod 240 has a first position and a second position, wherein the first position is located proximal to the second position. When the drive rod 240 moves linearly from the first position to the second position, the drive rod 240 drives the half gear 230 to rotate in a first direction via the first rack 210; when the drive rod 240 moves linearly from the second position to the first position, the drive rod 240 drives the half gear 230 to continue rotating in the first direction via the second rack 220. That is, the drive rod 240 alternately drives the first rack 210 and the second rack 220 to rotate the half gear 230 in one direction. One reciprocating motion of the drive rod 240 causes the half gear 230 to rotate one revolution, that is, drives the first gear 21 to rotate one revolution.

[0071] Specifically, see Figure 21 When the drive rod 240 is in the first position, the first rack 210 meshes with the half gear 230. When the drive rod 240 moves from the first position to the second position, the drive rod 240 drives the first rack 210 to rotate the half gear 230 until the second rack 220, located in the initial distal position, engages with the drive rod 240. See also Figure 22 When the drive rod 240 is in the second position, the second rack 220 meshes with the half gear 230, driving the drive rod 240 from the second position to the first position. The first rack 210 returns to its proximal initial position, and the drive rod 240 drives the second rack 220 to continue rotating the half gear 230 in the same direction until the second rack 220 disengages from the drive rod 240. After disengaging from the drive rod 240, the second rack 220 returns to its distal initial position.

[0072] Specifically, see Figure 15 The motion conversion mechanism 200 includes a first elastic element 201 connected to a second rack 220. The first elastic element 201 causes the second rack 220 to tend to return to its distal initial position. When the second rack 220 is disengaged from the drive rod 240, the second rack 220 returns to its distal initial position under the action of the first elastic element 201. Specifically, the first elastic element 201 may be a helical spring, with its proximal end connected to the distal end of the second rack, and its distal end connected to the housing 100, for example, to the second housing 120.

[0073] Specifically, in some embodiments, the first rack 210 can be directly or indirectly connected to the drive rod 240, and the drive rod 240 drives the first rack 210 to move synchronously when it reciprocates. In other embodiments, when the drive rod 240 moves from the first position to the second position, the first rack 210 abuts against the drive rod 240, causing it to be pushed to move synchronously. At this time, the motion conversion mechanism 200 also includes a second elastic element 202, which is connected to the first rack 210, and the second elastic element 202 gives the first rack 210 a tendency to return to the proximal initial position. See also... Figure 15 The second elastic element 202 can be a helical spring. The proximal end of the second elastic element 202 is connected to the housing 100, for example, to the second housing 120, and the distal end is connected to the first rack 210, for example, to the distal end of the first rack. During the linear reciprocating motion of the first rack 210, the first rack 210 moves from its proximal initial position to its distal position by abutting against the drive rod 240, and then returns to its proximal initial position under the action of the second elastic element 202. This arrangement ensures that when the drive rod 240 drives the second rack 220 to start moving the half gear 230, even if the first rack 210 meshes with the half gear 230, it will not affect the normal rotation of the half gear 230, because the rotation of the half gear 230 can push the first rack 210 to continue moving distally. When the half gear 230 rotates to a point where it does not interfere with the proximal movement of the first rack 210, the first rack 210 moves proximally under the action of the second elastic element 202 until it abuts against the drive rod 240. The following explanation uses the motion conversion mechanism 200 with a second elastic element 202 as an example.

[0074] Specifically, see Figure 15 , Figure 16 Along the rotation direction of the half gear 230 (i.e., the first direction), the outer periphery of the half gear 230 is provided with a first engagement tooth 231 and a plurality of second engagement teeth 232 in sequence. The first engagement tooth 231 and the plurality of second engagement teeth 232 are adapted to mesh with the first rack 210 and the second rack 220, and the first engagement tooth 231 is configured to return the second rack 220 to the distal initial position.

[0075] More specifically, see Figures 15 to 18The half gear 230 extends along the height direction and includes a cylindrical body. A first engaging tooth 231 and several second engaging teeth 232 are disposed on the outer periphery of the body. The first rack 210 includes a first rack body 211 extending axially, on which several first teeth 212 are arranged axially. The second rack 220 includes a second rack body 221 extending axially, on which a third tooth 223 and several second teeth 222 are arranged axially, and the third tooth 223 is disposed away from the drive rod 240. The first teeth 212, second teeth 222, and third teeth 223 are all disposed towards the half gear 230. The second engaging teeth 232 are configured to mesh with the first teeth 212 and second teeth 222 respectively. The first engaging teeth 231 are configured to mesh with the third teeth 223, and the first engaging teeth 231 are staggered from the second teeth 222 along the height direction of the half gear. The engagement teeth of the half-gear 230 can mesh with the teeth of the rack, meaning that the engagement teeth at least partially coincide with the teeth of the rack along the height direction of the half-gear. For example, the first engagement tooth 231 is configured to mesh with the third tooth 223, meaning that the first engagement tooth 231 at least partially coincides with the third tooth 223 along the height direction of the half-gear, so that during the movement of the second rack 220 towards the proximal side, the third tooth 223 can finally mesh with the first engagement tooth 231, thereby driving the half-gear 230 to rotate. The first engagement tooth 231 is staggered from the second tooth 222 along the height direction of the half-gear, so that the second rack 220 does not interfere with the first engagement tooth 231 during the movement of the second rack 220 towards the distal side, facilitating the return of the second rack 220 to the distal initial position.

[0076] In some embodiments, the first tooth 212 is configured to be offset from the second tooth 222 along the height direction of the half-gear. See specifically... Figures 15 to 18 The first engaging tooth 231 of the half gear 230 is a short engaging tooth, and the second engaging tooth 232 is configured as a long engaging tooth. The second engaging tooth 232 includes a first portion and a second portion extending along the height direction of the half gear, wherein the first portion is flush with the first engaging tooth 231. The first tooth 212 is adapted to mesh with the first portion of the first engaging tooth 231 and the first portion of the second engaging tooth 232, and the second tooth 222 is adapted to mesh with the second portion of the second engaging tooth 232. Along the height direction of the half gear, a portion of the third tooth 223 is flush with the first tooth 212. In some embodiments, along the rotation direction of the half gear 230 (i.e., the first direction), the half gear 230 is sequentially provided with the first engaging tooth 231, a plurality of second engaging teeth 232, and a third engaging tooth (not shown in the figure). The third engaging tooth may be flush with the second portion of the second engaging tooth 232, and the second tooth 222 of the second rack 220 may also mesh with the third engaging tooth. When the first rack drives the half gear 230 to rotate at the end of its stroke, the third engaging tooth meshes with the second tooth 222 of the second rack 220, which can push the second rack 220 to move closer to the side so that the second rack engages with the drive rod 240.

[0077] Specifically, see [link to relevant documentation] Figure 15 , Figure 17 The distal end of the first rack 210 is provided with a first fixing post 213, and the first fixing post 213 is provided with a first fixing groove 214. The distal end of the second elastic member 202 is connected to the first fixing groove 214. The distal end of the second rack 220 is provided with a second fixing post 227, and the second fixing post 227 is provided with a second fixing groove 228. The proximal end of the first elastic member 201 is connected to the second fixing groove 228.

[0078] See Figures 15 to 20 In some embodiments, the distal end of the drive rod 240 is provided with a connecting block 260, and the drive rod 240 is connected to the first rack 210 and the second rack 220 through the connecting block 260. Specifically, the main body of the connecting block 260 is provided with a longitudinally extending first receiving groove 261, which is adapted to receive the proximal end of the first rack 210. The distal end of the first receiving groove 261 is open and the proximal end is closed by an abutment wall 262. The first rack 210 can abut against the abutment wall 262 under the action of the second elastic member 202. The proximal end of the first rack body 211 is provided with a longitudinally extending reinforcing portion 215, the cross-sectional area of ​​which is larger than that of the first rack body 211. The first receiving groove 261 is adapted to receive the reinforcing portion 215, and the proximal end face of the reinforcing portion 215 can abut against the abutment wall 262.

[0079] Specifically, see [link to relevant documentation] Figure 19 , Figure 20 The main body of the connecting block 260 is provided with a longitudinally extending second receiving groove 263, which is adapted to receive the proximal end of the second rack 220. Along the longitudinal direction, the two ends of the second receiving groove 263 are open, and the inner sidewall of the second receiving groove 263 is provided with a first engaging tooth 264 and a first engaging groove 271 adjacent to the first engaging tooth 264. (Continue to see...) Figure 17 , Figure 18The proximal end of the second rack body 221 facing the first engaging tooth 264 is provided with a second engaging tooth 224 and a second engaging groove 272 adjacent to the second engaging tooth 224. The first engaging groove 271 is adapted to engage the second engaging tooth 224, and the second engaging groove 272 is adapted to engage the first engaging tooth 264. The second rack 220 and the drive rod 240 are detachably connected via the first engaging tooth 264, the second engaging tooth 224, the first engaging groove 271, and the second engaging groove 272. Specifically, the cross-section of the second receiving groove 263 is constructed to be rectangular, and the second engaging tooth 224 and the second engaging groove 272 are disposed on one of the four inner sidewalls of the second receiving groove 263, for example, on the inner sidewall of the bottom. Correspondingly, the cross-section of the proximal end of the second rack 220 is constructed to be rectangular, and the second snap-fit ​​tooth 224 and the second snap-fit ​​groove 272 are disposed on one of the four side walls of the proximal end facing the first snap-fit ​​tooth 264 and the first snap-fit ​​groove 271, for example, on the bottom side of the proximal end of the second rack 220.

[0080] Specifically, in some embodiments, the connecting block 260 includes at least two first engaging teeth 264, with a first engaging groove 271 formed between two adjacent first engaging teeth 264. In other embodiments, the first engaging groove 271 is also disposed on the side of the first engaging tooth 264 located at the end, away from its adjacent first engaging tooth. Similarly, the second engaging groove 272 can also be disposed in this manner. Specifically, the first engaging teeth 264 and the second engaging teeth 224 can be constructed as teeth of any shape, as long as they are suitable for engagement, such as triangular teeth, trapezoidal teeth, etc., which will be described below as an example of triangular teeth. Preferably, in some embodiments, the tips of the first engaging teeth 264 and the second engaging teeth 224 are inclined in a direction that makes it difficult for them to separate when the connecting block 260 moves the second rack 220 towards the proximal end. Specifically, the tips of the first engaging teeth 264 are inclined towards the proximal end, and the first engaging teeth 264 include a second long side 264a and a second short side 264b. In some embodiments, the angle between the second long side 264a and the axis of the control handle 10 is greater than 120°, and the angle between the second short side 264b and the axis of the control handle 10 is greater than 90° and less than the angle between the second long side 264a and the axis of the control handle 10. For example, the angle between the second short side 264b and the longitudinal direction is 95°. The tips of the second locking teeth 224 are inclined towards the distal end, and the second locking teeth 224 include a first long side 224a and a first short side 224b.

[0081] When the second rack 220 moves toward the connecting block 260, the second long side 264a of the first engaging tooth 264 pushes the first long side 224a of the second engaging tooth 224 upward, causing the second engaging tooth 224 to pass over the first engaging tooth 264 and engage with the first engaging groove 271. Simultaneously, the first engaging tooth 264 engages with the second engaging groove 272. After the engaging teeth and grooves are engaged, the connecting block 260 can drive the second rack 220 to move to the proximal end of the housing 100. Because the tips of both the first engaging tooth 264 and the second engaging tooth 224 are inclined, the connecting block 260 is less likely to separate the second rack 220 when it moves towards the proximal end.

[0082] Specifically, the motion conversion mechanism 200 further includes a separation feature. When the drive rod 240 moves from the second position to the end of its stroke at the first position, the separation feature is configured to lift the proximal end of the second rack 220, thereby separating the first engaging tooth 264 from the second engaging groove 272, and separating the second engaging tooth 224 from the first engaging groove 271. In some embodiments, the separation feature includes a first separation slope disposed at the end of the second rack 220 toward the second receiving groove 263, and a second separation slope disposed at the proximal end of the housing. The first separation slope is disposed proximal to the second engaging tooth 224. When the second rack 220 moves toward the proximal end of the housing until the first separation slope contacts the second separation slope, the second separation slope pushes the first separation slope upwards along it, thereby lifting the proximal end of the second rack 220 to separate the first engaging tooth 264 from the second engaging groove 272, and separating the second engaging tooth 224 from the first engaging groove 271. The second rack 220 moves to the initial position at the distal end under the action of the first elastic member 201.

[0083] In other embodiments, see also Figures 17 to 20The separation features include a protrusion 226 and a sliding portion 225 disposed near the proximal end of the second rack 220, and a support portion 265 and a groove 266 disposed on the connecting block 260. Specifically, the cross-section of the sliding portion 225 is smaller than the cross-section of the protrusion 226. Both the sliding portion 225 and the protrusion are disposed near the proximal end of the second rack body 221 and away from the second engaging tooth 224. The protrusion 226 is connected to the second rack body 221 via the sliding portion 225. The groove 266 is configured as a longitudinally extending opening. The groove 266 is disposed on the sidewall that restricts the second receiving groove 263, and this sidewall is disposed opposite to the first engaging tooth 264. The sidewalls located on both sides of the groove 266 constitute the support portion 265. Specifically, the sidewall of the second receiving groove 263 is restricted to extend to the top of the second receiving groove 263, and a longitudinally extending opening is formed on the sidewall of the top, which is a sliding groove 266. The top sidewalls on both sides of the sliding groove 266 form support portions 265. The sliding groove 266 is adapted to receive the sliding portion 225, and the support portion 265 is adapted to support the protrusion 226. During the process of the second rack 220 moving proximally under the drive of the drive rod 240, after the proximal end of the second rack 220 hits the inner wall of the housing, the second rack 220 jumps upward under the impact force, causing the sliding portion 225 to enter the sliding groove 266. The protrusion 226 is supported by the support portion 265, thereby separating the engaging tooth from the engaging groove. The second rack 220 moves distally under the action of the first elastic member 201, and the protrusion 226 slides distally on the support portion 265, thereby separating from the connecting block 260. Preferably, to facilitate the sliding part 225 entering the groove 266, the proximal end of the groove 266 is provided with a groove enlargement 266a. Specifically, the groove enlargement 266a can be configured to gradually narrow from the proximal end to the distal end.

[0084] In some embodiments, the motion conversion mechanism 200 is provided with an anti-reverse rotation structure 250. The anti-reverse rotation structure 250 includes a fixed portion and a movable portion that rotates with the half-gear 230. When the fixed portion and the movable portion interact, they restrict the half-gear 230 from reversing (i.e., rotating in the opposite direction). Specifically, when the first rack 210 or the second rack 220 causes the half-gear 230 to have a tendency to rotate in the opposite direction (reverse rotation), the fixed portion and the movable portion interact to restrict the half-gear 230 from reversing. For example, when the first rack 210 drives the half-gear to rotate 180°, the fixed portion and the movable portion interact to prevent the second rack 220 from moving distally and driving the half-gear 230 to reverse; or when the second rack 220 drives the half-gear to rotate 180°, the fixed portion and the movable portion interact to prevent and restrict the first rack 210 from moving proximally and driving the half-gear 230 to reverse. More specifically, see... Figure 16The movable part is configured as an inclined step 251 located at the end of the first gear 21. The inclined step 251 is configured to include a first inclined surface 251a and a limiting abutment surface 251b. Along the rotation direction of the half gear 230, the first inclined surface 251a is inclined downward, and the limiting abutment surface 251b is located on the side with the higher elevation of the first inclined surface 251a. See also Figure 13 The fixing part is constructed as a column 252, and the end of the column 252 is constructed to have a second inclined surface 252a. The second inclined surface 252a is adapted to the first inclined surface 251a, so that when the half gear rotates in the first direction (i.e., forward rotation), the inclined step 251 can pass through the column 252. When the column 252 passes over the inclined step 251 and the half gear 230 has a tendency to rotate in the opposite direction, the inclined step 251 abuts against the column 252 to restrict the half gear 230 from reversing (reverse rotation). In some embodiments, the end of the first gear 21 facing the half gear is provided with an annular groove 21a, the inclined step 251 is disposed in the annular groove 21a, and the distal end of the column 252 can slide in the annular groove 21a.

[0085] Specifically, the column 252 is disposed on the second housing 120, and at least one inclined step 251 is provided at the end of the first gear 21. When the second rack 220 causes the half gear 230 to have a tendency to rotate in the reverse direction, the column 252 and the inclined step 251 interact to restrict the half gear 230 from rotating in the reverse direction. In some embodiments, one of the column 252 and the inclined step 251 is constructed as two, and the other as one, such that when the first rack 210 and the second rack 220 cause the half gear 230 to have a tendency to rotate in the reverse direction, the anti-reverse structure 250 can prevent the half gear 230 from rotating in the reverse direction. Specifically, for example, the inclined step 251 is constructed as two, and the two inclined steps 251 are arranged circumferentially spaced 180° apart at the end of the first gear 21.

[0086] Alternatively, in some embodiments, the movable part of the anti-reverse structure 250 is configured as a ratchet, and the fixed part is configured as a ratchet tooth. The ratchet and the half gear 230 are arranged coaxially, and the ratchet tooth is fixed to the housing 100. The ratchet tooth and the ratchet cooperate to restrict the ratchet from rotating in one direction, that is, to restrict the half gear 230 from rotating in one direction.

[0087] See also Figure 13In some embodiments, the housing 100 further includes limiting grooves for guiding the longitudinal movement of the first rack 210 and the second rack 220. Specifically, the inner side of the second housing is provided with a longitudinally extending first rack limiting groove 124 and a second rack limiting groove 125. Both the first rack limiting groove 124 and the second rack limiting groove 125 are open at both ends. The first rack limiting groove 124 is configured to accommodate the first rack body 211, and the second rack limiting groove 125 is configured to accommodate the second rack body 221. Optionally, the first rack limiting groove 124 further includes a sidewall that restricts the movement of the first rack 210 in the height direction, and the second rack limiting groove 125 further includes a sidewall that restricts the movement of the second rack 220 in the height direction.

[0088] Specifically, in some embodiments, the housing 100 further includes a rack abutment portion to restrict the distal movement of the first rack 210 or the second rack 220. Specifically, in some embodiments, the proximal sidewall of the first rack limiting groove 124 is the first rack abutment portion 124a, and the distal sidewall of the reinforcing portion 215 of the first rack can abut against the first rack abutment portion 124a. When the half gear 230 rotates to disengage from the first rack 210, it can restrict the first rack 210 from continuing to move distally under inertia. See also... Figure 13 , Figure 17 , Figure 18 The proximal sidewall of the second rack limiting groove 125 is the second rack abutment portion 125a. The second rack body 221 is provided with a rack limiting block 229. The distal sidewall of the rack limiting block 229 can abut against the second rack abutment portion 125a. The second rack 220 is held in its distal initial position under the action of the first elastic member 201 and the second rack abutment portion 125a. In some embodiments, during the process of the proximal end of the second rack engaging with the connecting block 260, the abutment between the rack limiting block 229 and the second rack abutment portion 125a can provide support for the engagement of the two.

[0089] In some embodiments, a longitudinally extending guide groove and a guide rail are further provided between the housing 100 and the connecting block 260 to guide the connecting block 260 to move axially and to support the connecting block 260. Specifically, the main body of the connecting block 260 has a longitudinally extending first housing guide groove 267 and a second housing guide groove 268 disposed opposite to each other, the first housing guide groove 267 facing the first housing 110 and the second housing guide groove 268 facing the second housing 120. The first housing 110 has a longitudinally extending first connecting block guide rail 115 adapted to cooperate with the first housing guide groove 267, and the second housing 120 has a longitudinally extending second connecting block guide rail 122 adapted to cooperate with the second housing guide groove 268. In some embodiments, two second housing guide grooves 268 and two second connecting block guide rails 122 are also constructed.

[0090] In some embodiments, the housing 100 is provided with a limiting feature to restrict the distal movement of the drive rod 240 and the connecting block 260. Specifically, in some embodiments, the limiting feature may be configured as a proximal end face on the housing, against which the distal end face of the connecting block 260 may abut and limit its movement. Preferably, the control handle 10 further includes a third elastic element 203 disposed between the limiting feature of the housing and the connecting block 260. When the drive rod 240 moves from a first position to a second position, the third elastic element 203 is compressed, causing the drive rod 240 to tend to move towards the first position. The third elastic element 203 provides power for the proximal movement of the connecting block 260 and reduces the impact force of the connecting block 260 on the housing.

[0091] Specifically, see Figure 2 , Figure 14 and Figure 19 A longitudinally extending third spring guide post 269 is provided on the distal side of the main body of the connecting block, and a third elastic member 203 is sleeved onto the third spring guide post 269. A third spring support portion 112 is provided on the inner side of the first housing 110, and the third spring support portion 112 is provided with a longitudinally extending guide post groove 112a, within which the third spring guide post 269 can move. The third spring support portion 112 is provided with a third spring abutment portion 112b, which is a limiting feature, and the distal end of the third elastic member 203 can abut against the third spring abutment portion 112b. Specifically, the third spring abutment portion 112b can be the proximal end face of the third spring support portion 112. Preferably, the proximal end of the guide post groove 112a is adapted to accommodate the third elastic member 203, and the third spring abutment portion 112b is the end face formed at the point where the cross-section of the guide post groove 112a decreases. Specifically, along the longitudinal direction, the first housing 110 is provided with a slider guide rail 116, a third spring support part 112 and a first connecting block guide rail 115 in sequence, and the first connecting block guide rail 115 is located on the near side.

[0092] The following is combined Figures 21 to 23 This section details the movement of each component of the motion conversion mechanism 200 during one reciprocating motion of the drive rod 240. (See also...) Figure 21 The first rack 210 is in its proximal initial position, with its proximal end abutting against the connecting block 260, and it meshes with the half gear 230; the second rack 220 is separated from the connecting block and is in its distal initial position, and it does not mesh with the half gear 230. At this time, see... Figure 3 , Figure 4The first coupling protrusion 22 and the second coupling protrusion 24 are both located at the closest end of their respective rotational strokes, that is, the centers of the first gear and the second gear are located on the line connecting them and are respectively located near the centers of their corresponding gears, so that the first slider 26 and the second slider 27 are both located at the closest end of their movement strokes. Correspondingly, the actuation tube 29 and the actuation shaft 28 are located at... Figure 6 , Figure 7 The location shown. See also... Figure 21 With the drive lever 240 in the first position, operate the drive lever 240 to move in the drive lever movement direction 106 (i.e., towards the far end) as shown in the figure until it is in the position shown in the figure. Figure 22 In the second position shown, the first rack 210 pushes the half gear 230 toward... Figure 21 The half gear 230 rotates 180° in the direction of rotation 107 (counterclockwise). The first gear 21 follows the half gear 230 and rotates 180° counterclockwise. The first gear 21 drives the third gear 25 to rotate 180° in the direction of rotation 108 (clockwise) shown in the figure. The third gear 25 drives the second gear 23 to rotate 180° in the direction of rotation 109 (counterclockwise) shown in the figure. In other words, the first gear 21 and the second gear 23 rotate 180° counterclockwise simultaneously. The first coupling bump 22 and the second coupling bump 24 also rotate 180° around their respective gear centers to reach the farthest point of their rotational stroke (i.e., the centers of the first and second gears are located on the line connecting them, and both are located far from the centers of their respective gears), causing the first slider 26 and the second slider 27 to move to the farthest point of their respective movement strokes. At this time, the actuation tube 29 and the actuation shaft 28 are located... Figure 7 , Figure 10 As shown in the diagram, during the distal movement of connecting block 260, it gradually approaches the second rack 220 until they engage. When the first rack 210 moves distally, the distal end of the second elastic element 202 moves distally along with it, and the second elastic element 202 is stretched. During the distal movement of connecting block 260 driven by drive rod 240, the third elastic element 203 is compressed.

[0093] See also Figure 22 The first rack 210 and the half gear 230 are not disengaged (i.e., continue to be engaged), and the half gear 230 rotates to engage with the second rack 220. The second rack 220 is in its distal initial position and its proximal end is engaged with the connecting block 260. The drive rod 240 is in its second position, and the third elastic element 203 is compressed to its shortest length. The drive rod 240 is operated (i.e., the drive rod 240 is pulled towards the third elastic element 203 and / or by the operator's pull force)... Figure 22 The drive lever, as shown in the diagram, moves in the direction of 106 (i.e., toward the proximal end) until it is positioned... Figure 23 , Figure 21In the second position shown, the second rack 220 moves towards the proximal end under the drive of the drive rod 240. Since the second rack 220 meshes with the half gear 230, the half gear 230 continues to move towards the proximal end under the push of the second rack 220. Figure 22 The half gear 230 rotates 180° in the direction of rotation 107 (i.e., counterclockwise). The first gear 21 and the second gear 23 follow the half gear 230 and continue to rotate 180° counterclockwise. The first coupling protrusion 22 and the second coupling protrusion 24 also continue to rotate 180° around the center of their respective gears and return to the nearest side of their respective rotation stroke (i.e., the centers of the first gear and the second gear are located on the line connecting them and are located near the center of their respective gears), so that the first slider 26 and the second slider 27 move to the nearest end of their respective movement stroke.

[0094] When the second rack 220 drives the half gear 230 to start rotating, since the first rack 210 continues to mesh with the half gear 230, the continuously rotating half gear 230 will push the first rack 210 to continue moving further distally, and the second elastic element 202 will continue to be stretched. When the half gear 230 rotates to the point where it no longer meshes with the first rack 210, the first rack 210 moves proximally under the action of the second elastic element 202 until it abuts against the connecting block 260. See also Figure 23 When the drive rod 240 returns to the first position, the first rack 210 returns to its proximal initial position, and the half gear 230 rotates to mesh with the first rack 210. Additionally, as the second rack 220 moves proximally, the first elastic element 201 is gradually stretched. When the drive rod 240 moves proximally until the proximal end of the second rack touches the proximal inner wall of the housing, the proximal end of the second rack jumps up under the impact force, and under the action of the first elastic element 201, the protrusion 226 is positioned above the support portion 265, and the sliding portion 225 enters the groove 266, thereby separating the first engaging tooth, the second engaging tooth, and the corresponding engaging groove. See also Figure 21 After the second rack 220 separates from the connecting block 260, the second rack 220 returns to its initial distal position under the pulling force of the first elastic element 201. As the drive rod 240 moves the connecting block 260 toward the proximal end, the third elastic element 203 gradually extends.

[0095] It should be added that, see [link / reference] Figure 3 and Figure 13 Optionally, the housing 100 includes one first gear bracket 113 and two second gear brackets 123. Specifically, the first gear bracket 113 is disposed in the first housing 110 and is used to connect the third gear 25. Specifically, the two second gear brackets 123 are disposed in the second housing 120 and are used to connect the second gear 23 and the half gear 230, respectively. See also Figure 16The end of the half gear 230 facing the second housing 120 is provided with a mounting hole 233, which is used to engage with the second gear bracket 123.

[0096] See Figures 24 to 28 Specifically, the receiving compartment drive mechanism 300 of this disclosure includes a drive block 310, a wrench 301, a wrench connecting shaft 303, and a drive line 302. Specifically, the wrench connecting shaft 303 extends laterally and is rotatably connected to the housing 100, for example, to the first housing 110. The wrench 301 is disposed outside the housing 100 and fixed to the wrench connecting shaft 303, i.e., the wrench 301 is rotatably connected to the housing 100. The drive block 310 is disposed inside the housing 100 and coupled to the wrench connecting shaft 303, for example, rotatably connected to the wrench connecting shaft 303. The proximal end of the drive line 302 is connected to the drive block 310. When the wrench 301 is rotated to switch between a closed position and an open position, it can drive the drive block 310 to reciprocate longitudinally, thereby driving the receiving compartment 440 to switch between an extended position and a mating position.

[0097] Specifically, see Figure 1 , Figure 2 and Figure 29 When wrench 301 from Figure 1 The indicated close position is switched to Figure 2 When the opening position is shown, in Figure 29 The wrench rotation direction 304 shown is clockwise. The wrench 301 drives the drive block 310 and drive cable 302 to move towards the proximal end (i.e., the drive block movement direction 305 is from the distal end to the proximal end), which in turn drives the receiving compartment 440, located in the extended position, to rotate counterclockwise around the receiving compartment connecting shaft 45 to the mating position. Figure 29 The receiving compartment shown rotates counterclockwise in direction 306. When the wrench 301 is... Figure 2 The opening position shown has been switched to Figure 1 When in the closed position as shown, the wrench 301 moves the drive block 310 and drive line 302 to the distal end, thereby driving the receiving compartment 440 from... Figure 2 The shown mating position is switched to Figure 1 The extended bits are shown.

[0098] Specifically, see Figure 3 and Figure 13 The first housing 110 has a first through hole 111, and the slider guide rail 116 has a second through hole 116a. The wrench connecting shaft 303 extends through the first through hole 111 and the second through hole 116a and is rotatably connected to the first housing 110. See also Figures 26 to 28The wrench 301 is constructed in a C-shape. Connecting protrusions 301a are provided on the inner sides of both ends of the wrench 301, and end connecting grooves 303d for engaging the connecting protrusions 301a are provided on both ends of the wrench connecting shaft 303.

[0099] Specifically, the drive block 310 has a channel 315 through which the actuation tube 29 extends to its distal end. More specifically, the drive block 310 includes a drive seat 311 and a locking block 312. The drive seat 311 has a longitudinally extending inner cavity, in which the locking block 312 is disposed, and the channel 315 is disposed in the locking block 312. The proximal end of the drive line 302 is fixed to the locking block 312, and the proximal end of the drive seat 311 has a longitudinally extending extension rod 314. The proximal end of the extension rod 314 has an extension rod connecting portion 316, and the wrench connecting shaft 303 has an extension rod connecting groove 303a adapted to accommodate the extension rod connecting portion 316. The extension rod connecting portion 316 is placed in the extension rod connecting groove 303a, and the extension rod 314 and the wrench connecting shaft 303 are rotatably connected through the extension rod connecting portion 316 and the extension rod connecting groove 303a. Specifically, the extension direction of the extension rod connecting portion 316 and the extension direction of the extension rod connecting groove 303a are both parallel to the axis of the wrench connecting shaft 303, and the extension rod 314 and the extension rod connecting portion 316 form a T-shape. Preferably, see Figures 26 to 28 The extension rod connecting portion 316 has a circular cross-section, and the extension rod connecting groove 303a has an arc-shaped opening. The wrench connecting shaft 303 also has an extension rod rotating groove 303b that extends circumferentially and communicates with the extension rod connecting groove 303a. The extension rod rotating groove 303b is adapted to accommodate the proximal end of the extension rod 314. When the wrench 301 and the wrench connecting shaft 303 are rotated, the groove wall of the extension rod connecting groove 303a pushes the extension rod connecting portion 316, thereby driving the extension rod 314 (i.e., the drive block 310) to move longitudinally. At the same time, the proximal end of the extension rod 314 enters or exits the extension rod rotating groove 303b. When the wrench connecting shaft 303 drives the extension rod connecting portion 316 to move proximally, the proximal end of the extension rod 314 enters the extension rod rotating groove 303b; when the wrench connecting shaft 303 drives the extension rod connecting portion 316 to move distally, the proximal end of the extension rod 314 exits the extension rod rotating groove 303b.

[0100] In some embodiments, the stitch 46 extends through the wrench connecting shaft 303. See also Figures 26 to 28The wrench connecting shaft 303 is also provided with a thread rotation groove 303c to prevent interference with the thread 46 when the wrench connecting shaft 303 rotates. In some embodiments, the thread rotation groove 303c is configured as a channel penetrating the wrench connecting shaft 303, and the thread rotation groove 303c forms two openings on the wrench connecting shaft 303. When the wrench 301 is in the closed position, the opening located on the far side of the wrench connecting shaft 303 can be configured as a circular opening, and the opening located on the near side of the wrench connecting shaft 303 can be configured as an elongated opening extending circumferentially. Alternatively, in other embodiments, the thread rotation groove 303c can be configured as an opening groove extending circumferentially on the wrench connecting shaft 303.

[0101] In some embodiments, see Figures 24 to 26 A fourth elastic member 313 is further provided between the drive seat 311 and the locking block 312. The fourth elastic member 313 extends longitudinally, with one end abutting against the drive seat 311 and the other end abutting against the locking block 312, thereby fixing the locking block 312 to the drive seat 311. In some embodiments, see Figure 3 and Figure 13 The housing 100 has a longitudinally extending drive block guide groove 117 and a drive block support portion 126 on its inner side. The drive seat 311 is disposed on the drive block support portion 126 and located within the drive block guide groove 117. Specifically, the drive block guide groove 117 is disposed on the inner side of the first housing 110 and is located on the far side of the slider guide rail 116 in the longitudinal direction; the drive block support portion 126 is disposed on the inner side of the far end of the second housing 120. In some embodiments, the far end of the drive block support portion 126 is further provided with a drive block limiting portion 127 that is higher than its support surface. The drive block limiting portion 127 is used to limit the movement of the drive block 310 to the far end.

[0102] See also Figure 3 , Figure 4 , Figure 13 , Figure 14 and Figure 30In some embodiments, the control handle 10 further includes a rotation indicator 410 rotatably connected to the housing 100. The outer periphery of the housing 100 is provided with several position markers 104, and the rotation indicator 410 is provided with rotation marks 414. During suturing, the receiving chamber 440 needs to be rotated to different positions on the wound to suture it. The receiving chamber 440 is connected to a tube 41, which is connected to the housing 100. Rotating the housing 100 synchronously rotates the drive mechanism 20, the tube 41, and the receiving chamber 440. While rotating the housing 100, the rotation indicator 410 remains stationary, allowing the operator to identify whether the housing 100 (receiving chamber 440) has rotated to the target position via the position markers 104 and rotation marks 414, facilitating the suturing operation. Specifically, the rotation marks 414 are arrows or other easily recognizable patterns. Specifically, the position markers 104 can be numerical markers 104a or rotation direction markers 104b. In some embodiments, the housing 100 is provided with 12 position marks 104 evenly arranged circumferentially, that is, the interval between adjacent position marks is 30°. Among them, there are 6 numerical marks 104a and 6 rotation direction marks 104b.

[0103] Specifically, in some embodiments, the rotating indicator 410 can be sleeved onto the housing 100. One of the housing 100 and the rotating indicator 410 has an annular connecting groove, and the other has connecting teeth adapted to be placed in the annular connecting groove. The housing 100 and the rotating indicator 410 are rotatably connected via the annular connecting groove and the connecting teeth. When the housing 100 rotates relative to the rotating indicator 410, the connecting teeth slide in the annular connecting groove. The connecting teeth can be configured as annular teeth or individual teeth. The annular teeth can be a complete ring or a part of a ring.

[0104] Specifically, in some other embodiments, the rotation indicator 410 is disposed at the end of the housing 100, see [reference]. Figure 3 , Figure 4 For example, it may be located near the proximal end of housing 100. Similarly, housing 100 and the rotation indicator 410 are rotatably connected via an annular connecting groove and connecting teeth. See also... Figure 3 , Figure 4 , Figure 30 and Figure 31Specifically, the near end of the housing 100 is provided with an end plate 118, and the end plate 118 is provided with an annular connecting groove 102 facing the rotating indicator 410. The rotating indicator 410 includes an indicator body 411, and the middle of the indicator body 411 is provided with a longitudinally extending third through hole 412. The near end of the drive rod 240 extends through the third through hole 412 (that is, the indicator body 411 is sleeved onto the drive rod 240). Preferably, the cross-section of the third through hole 412 is configured to be similar to the cross-section of the drive rod 240, for example, cross-shaped, to guide the drive rod 240 to move smoothly longitudinally. The distal end face of the indicator body 411 is provided with connecting teeth 416. Specifically, the connecting teeth 416 are configured as a plurality of independent teeth, that is, the distal sidewall of the indicator body 411 is provided with a plurality of connecting teeth 416 arranged circumferentially.

[0105] More specifically, in some embodiments, the annular connecting groove 102 includes a narrow portion 102a and a wide portion 102b that communicate with each other, with the narrow portion 102a disposed near the wide portion 102b, such that the cross-section of the annular connecting groove 102 is approximately T-shaped. The connecting tooth 416 includes a thin portion 416a and a connecting block 416b arranged longitudinally, with the connecting block 416b located far from the thin portion 416a. The narrow portion 102a is configured to accommodate the thin portion 416a, and the wide portion 102b is configured to accommodate the connecting block 416b. The connecting block 416b is configured not to enter the narrow portion 102a; for example, the maximum outer contour of the cross-section of the connecting block 416b is larger than the outer contour of the cross-section of the narrow portion 102a. The connecting tooth 416 is provided with the connecting block 416b, and the annular connecting groove 102 is provided with the wide portion 102b, making it difficult for the connecting tooth 416 and the annular connecting groove 102 to separate longitudinally after engagement. See also... Figure 30 The connecting block 416b is a cone that gradually decreases in size from proximal to distal, and the cross-section of the cone is rectangular. Preferably, the sum of the angles at which the plurality of connecting teeth 416 are distributed is less than or equal to 180°, which facilitates the assembly of the rotary indicator 410 to the housing 100. For example, in the assembly of the control handle 10, the connecting teeth 416 of the rotary indicator 410 can be screwed into the annular connecting groove 102 of the second housing first, and while keeping the plurality of connecting teeth 416 in the annular connecting groove 102 of the second housing 120, the first housing 110 is then connected to the second housing 120 to form a complete housing 100. More specifically, the number of connecting teeth 416 is four, and the four connecting teeth 416 are evenly spaced circumferentially and distributed at an angle of less than or equal to 180°.

[0106] Specifically, in some embodiments, one of the housing 100 and the rotation indicator 410 is provided with a rotation limiting block, and the other is provided with a rotation limiting groove. When the housing 100 rotates to align one of the position marks 104 with the rotation mark 414, the rotation limiting block is located within the rotation limiting groove, thereby facilitating the rotational positioning of the housing 100 to each position mark 104. More specifically, the end plate 118 is provided with a plurality of rotation limiting grooves 103, each rotation limiting groove 103 being aligned with one position mark 104. A rotation limiting block 415 is provided on the proximal end face of the indicator body 411, and the rotation limiting block 415 is disposed radially outside the connecting tooth 416, and is aligned with the rotation mark 414. The rotation limiting block 415 is constructed as a hemispherical, ellipsoidal, prism-shaped, or strip-shaped protrusion extending along the height direction of the control handle 10, and the rotation limiting groove 103 is constructed to accommodate the rotation limiting block 415.

[0107] In a preferred embodiment, the rotation limiting block 415 is configured as an arc-shaped strip protrusion extending along the height direction, and the rotation limiting groove 103 is configured as a rectangular groove. See also Figure 3 , Figure 31 The rotation limiting groove 103 includes an arc-shaped sidewall 103a and a flat sidewall 103b. The flat sidewall 103b extends radially and is aligned with the corresponding position mark 104, so that when the housing 100 rotates to the point where the rotation limiting block 415 abuts against the flat sidewall 103b, the rotation limiting block 415 is exactly aligned with the position mark 104. The rotation direction of the housing 100 is from the arc-shaped sidewall 103a to the flat sidewall 103b. Figure 31 As shown, looking from the proximal end to the distal end of the suture system 40, the rotation direction of the housing 100 is clockwise. When the housing 100 rotates relative to the rotation indicator 410, the rotation limit block 415 easily enters the rotation limit groove 103 from the arc-shaped sidewall 103a, but it is not easy for the rotation limit block 415 to cross the flat sidewall 103b. When the rotation limit block 415 needs to cross the flat sidewall 103b, the operator needs to pull the rotation indicator 410 proximally and then continue rotating the housing 100. When the housing 100 rotates to the point where the rotation limit block 415 enters the rotation limit groove 103, a "click" sound is emitted to remind the operator whether the target rotation position has been reached.

[0108] Specifically, see Figure 3 and Figure 30 In some embodiments, the outer contour of the indicator body 411 is configured to gradually decrease in size from the distal end to the proximal end. For example, the indicator body 411 is configured as a truncated cone, with the outer diameter of the distal cross-section being larger than the outer diameter of the proximal cross-section. Optionally, the outer periphery of the indicator body 411 is also provided with a grip portion 413 for easy gripping by the operator.

[0109] See Figure 32 After the interventional procedure is completed and the puncture sheath is removed, the access sheath 42 of the suturing system 40 of this disclosure can be inserted into the pre-sutured blood vessel 51 via guidewire exchange. Once the distal end of the access sheath 42 and the tube 41 is inside the blood vessel 51, the guidewire can be removed (not shown in the figure). The control handle 10 is operated to create an angle between the tube 41 and the pre-sutured blood vessel 51. When blood is observed flowing from the outlet vessel 47, it indicates that the distal end of the access sheath 42 and the tube 41 has been properly positioned. Then, the wrench 301 is driven from... Figure 32 , Figure 1 Rotate to the indicated closing position Figure 2 As shown in the open position, wrench 301 moves receiving compartment 440 from... Figure 6 The extended position shown is rotated to Figure 7 As shown in the diagram, the receiving compartment 440 is in the state of waiting to receive the needle 43. Next, refer to... Figure 33 Choose the appropriate suturing method from the ones shown.

[0110] Figure 33 This demonstrates that different suturing methods can be selected based on the size of the wound 52 on the blood vessel 51. For example, Figure 33 For part a, when the wound 52 is small, a two-point suture can be used. See also Figure 33 For part a', the needle can be inserted at the suture position 53 marked ① and exited at the suture position 53 marked ④, then tied to secure the suture. Similarly, the needle can be inserted at the suture position 53 marked ④ and exited at the suture position 53 marked ①. Mark ① corresponds to the shell 100 rotating to position 1 opposite rotation mark 414, and mark ④ corresponds to the shell 100 rotating to position 4 opposite rotation mark 414. When four or six stitches are required, refer to the instructions in that order. Figure 33 The parts b', c', d', and e' in the text.

[0111] See Figure 33 In part b', if it is determined before the operation that 4 stitches are needed, the appropriate approach is to choose the suture position marked ⑥ to enter the needle and the suture position marked ③ to exit the needle, the suture position marked ② to enter the needle and the suture position marked ⑤ to exit the needle. After tightening the suture entry point ⑥ and the suture exit point ⑤ and tying a knot, the suturing can be completed.

[0112] See Figure 33 In part c', if it is determined before the operation that 4 stitches are needed, it is appropriate to choose the suture position marked ⑥ to enter the needle and the suture position marked ③ to exit the needle, the suture position marked ⑤ to enter the needle and the suture position marked ② to exit the needle. In this way, the suture can be completed by tightening the inlet suture ⑥ and the outlet suture ② and tying a knot.

[0113] See Figure 33In the d' part, alternatively, when it is determined preoperatively that 6 stitches are needed, it is appropriate to choose the suture position marked ⑥ as the entry point and the suture position marked ⑤ as the exit point; the suture position marked ④ as the entry point and the suture position marked ③ as the exit point; the suture position marked ② as the entry point and the suture position marked ① as the exit point. After tightening the entry point ⑥ and the exit point ① and tying a knot, the suture is complete. This suture method is the clinically described "purse-string suture," one of the most reliable suture methods.

[0114] See Figure 33 In the e' part, if it is determined preoperatively that 6 stitches are needed, the appropriate option is to enter the needle at the suture position marked ⑤, exit the needle at the suture position marked ④, enter the needle at the suture position marked ⑥, exit the needle at the suture position marked ③, enter the needle at the suture position marked ①, and exit the needle at the suture position marked ②. In this way, after tightening the suture entry point ⑤ and the suture exit point ② and tying a knot, the suturing can be completed.

[0115] The above-described Figure 33 The suturing methods shown are just examples, not all options. It's important to note that any location can be an entry point or an exit point, providing more clinical options. It's crucial to emphasize that this type of suturing must use an even number of stitches to ensure that the final stitch (43) remains outside the tissue.

[0116] The following explanation uses the example of suturing with two stitches. Figure 32 The rotation mark 414 of the rotating indicator 410 is aligned with position mark 104. At this point, the operator can locate the first needle and operate the drive mechanism 20 to transfer the needle to the receiving chamber 440. Specifically, the operator can hook the grip portion 413 of the rotating indicator 410 with their index and middle fingers, and then press the drive rod 240 located in the first position. The drive rod 240 pushes the first rack 210, which abuts against the connecting block 260, to move distally. Figure 21 As shown, the half gear 230 rotates counterclockwise under the drive of the first rack 210. When all the teeth of the half gear 230 are engaged, the half gear 230, the first gear 21, and the second gear 23 rotate exactly 180°. The first gear 21 and the second gear 23 drive the actuation shaft 28 and the actuation tube 29 to move to the distal end through the first slider 26 and the second slider 27, respectively, so that the needle 43 engages with the receiving chamber 440. The suture 46 follows the needle 43 into the tissue to be sutured, and the needle insertion process is completed at this time.

[0117] When the drive rod 240 moves to the second position, the third elastic element 203 is compressed to its maximum, generating a rebound force in the opposite direction of motion. At this time, the second rack 220 meshes with the half gear 230 and engages with the connecting block 260. Under the action of the rebound force of the third elastic element 203, the second rack 220 moves proximally, driving the half gear 230 to continue rotating counterclockwise. When all the teeth of the half gear 230 are fully engaged, the half gear 230, the first gear 21, and the second gear 23 rotate 180° again. The first gear 21 and the second gear 23 drive the actuation shaft 28 and the actuation tube 29 proximally via the first slider 26 and the second slider 27, respectively, so that the actuation shaft 28 and the actuation tube 29 return to the tube 41. At this time, the needle 43 is located inside the blood vessel 51, the suture 46 follows the needle through the tissue, and the actuation shaft 28 and the actuation tube 29 are located outside the blood vessel 51.

[0118] When the second rack 220 moves proximally to the end plate 118 of the impact housing 100, it separates from the connecting block 260 under the impact force and the tension of the first elastic element 201. The second rack 220 then returns to its initial distal position under the tension of the first elastic element 201. At this point, the first stitch is complete, and simultaneously, the drive rod 240 is in the first position, with the first rack 210 meshing with the half gear 230.

[0119] Next, the operator can select the location for the second suture based on the preoperative assessment. When suturing two stitches, the second stitch is placed 180° from the first stitch. At this point, the index and middle fingers need to hook the rotating indicator 410, rotating the housing 100 until the rotating mark 414 aligns perfectly with the 4 in the position mark 104. Then, the drive rod 240 in the first position is pressed a second time, moving it from the first position to the second position. The actuation shaft 28 and actuation tube 29 move distally until the needle 43 disengages from the receiving chamber 440 and engages with the actuation tube 29. That is, the actuation shaft 28 and actuation tube 29 work together to remove the needle 43 from the receiving chamber 440. Under the rebound force of the third elastic element 203, the drive rod 240 moves the actuation shaft 28 and actuation tube 29 proximally to the return tube 41. At this point, the needle 43 is located outside the blood vessel 51, the suture 46 follows the needle through the tissue again, and the actuation shaft 28 and actuation tube 29 are located outside the blood vessel 51.

[0120] It should be noted that when using the suturing system 40 of this disclosure for tissue suturing, each reciprocating motion of the drive rod 240 allows the needle 43 to pass through the tissue from outside or inside, enabling the suture 46 to pass through one suturing position. The number of times the drive rod 240 needs to be pressed corresponds to the number of suturing positions the suture 46 needs to pass through. It is important to note that each subsequent suturing position must have an angular difference from the previous one (e.g., an angle difference that is a multiple of 30°), which can be achieved by rotating the housing 100 accordingly. Furthermore, after suturing is complete, the control handle 10 can be operated to retract the inlet sheath 42, tighten the suture, and tie a knot. The suture can then be trimmed using a suture cutter. At this point, the suturing procedure is complete, and the suturing system 40 can be withdrawn.

[0121] The above descriptions are merely a few embodiments of this disclosure. Those skilled in the art can make various modifications or variations to the embodiments of this disclosure based on the content disclosed in the application documents without departing from the spirit and scope of this disclosure.

Claims

1. A suture system, characterized in that, include: Control handle, the control handle comprising: A housing, the outer periphery of which is provided with several position markers; The drive mechanism includes: A first gear, a second gear, and a third gear are rotatably fixed to the housing. The first gear and the second gear are arranged longitudinally, and the second gear rotates synchronously with the first gear through the third gear. The housing contains a conversion gear and a rack extending longitudinally. The conversion gear is fixed to the first gear and arranged coaxially with the first gear. The rack is configured to drive the conversion gear to rotate when it moves longitudinally, thereby driving the first gear to rotate. An actuation shaft and an actuation tube extending longitudinally, the actuation shaft being disposed within the actuation tube, and the distal ends of both the actuation shaft and the actuation tube extending to the outside of the housing, wherein the actuation shaft is coupled to the first gear and the actuation tube is coupled to the second gear; When the first gear and the second gear rotate, the first gear drives the actuation shaft to reciprocate longitudinally, and the second gear drives the actuation tube to reciprocate longitudinally. A rotating indicator, rotatably connected to the housing, the rotating indicator being provided with a rotation mark; The device comprises a tube, a receiving chamber, and a needle, wherein the tube is fixed to the housing and has a channel adapted to receive the actuation tube, the receiving chamber is coupled to the distal end of the tube, and the receiving chamber is configured to engage the needle. The distal end of the actuation tube is configured to engage with the needle, and when the rack moves longitudinally, the first gear and the second gear drive the actuation shaft and the actuation tube to reciprocate longitudinally, thereby causing the needle to alternately engage with the actuation tube and the receiving chamber. When the housing is rotated, the receiving compartment rotates synchronously, and the position markers and the rotation mark indicate the positions of the housing and the receiving compartment.

2. The suture system according to claim 1, characterized in that, The rotation indicator is disposed at the near end of the housing, and the distal end face of the rotation indicator is provided with connecting teeth. The connecting teeth are configured to include a thin portion arranged longitudinally and a connecting block, and the connecting block is located on the distal side of the thin portion. The near-side end face of the housing is provided with an annular connecting groove, which is configured to include a narrow portion and a wide portion that communicate with each other. The wide portion is configured to accommodate the connecting block, and the narrow portion is configured to accommodate the thin portion. The connecting block is configured to be unsuitable for entering the narrow section.

3. The suture system according to claim 1, characterized in that, The housing includes an enclosable first housing and a second housing, and the connecting teeth are configured to be a plurality of connecting teeth arranged at circumferential intervals, wherein the sum of the angles at which the plurality of connecting teeth are distributed is less than or equal to 180°.

4. The suture system according to claim 3, characterized in that, One of the housing and the rotation indicator is provided with a rotation limiting block, and the other is provided with a rotation limiting groove; When the housing is rotated to align one of the position markers with the rotation mark, the rotation limiting block is located within the rotation limiting groove.

5. The suture system according to any one of claims 2 to 4, characterized in that, The rotating limiting groove is configured as a plurality of rotating limiting grooves disposed at the end of the housing, and each rotating limiting groove is aligned with a position mark. The rotation limiting block is disposed on the proximal end face of the rotation indicator, and is disposed on the outside of the connecting tooth in the radial direction, and the rotation limiting block is aligned with the rotation mark; The rotating limiting block is configured as a strip-shaped protrusion extending along the height direction of the control handle, and the rotating limiting groove is configured to accommodate the rotating limiting block.

6. The suture system according to claim 5, characterized in that, The position markers include numerical markers and rotation direction markers, with adjacent position markers spaced 30° apart.

7. The suture system according to any one of claims 2 to 4, characterized in that, The conversion gear is configured as a half gear, and the rack is configured as a first rack and a second rack. The first rack has a proximal initial position, and the second rack has a distal initial position. The first rack and the second rack alternately drive the half gear to rotate, and each alternation can drive the half gear to rotate one revolution. The drive mechanism further includes a longitudinally extending drive rod, which is configured to move linearly between a first position and a second position; When the drive rod moves from the first position to the second position, the drive rod drives the first rack to move from the proximal initial position to the distal side, causing the first rack to drive the half gear to rotate; when the drive rod moves from the second position to the first position, the drive rod drives the second rack to move from the distal initial position to the proximal side, causing the second rack to drive the half gear to rotate and continue rotating. The first gear rotates once, causing the actuation shaft to reciprocate once; the second gear rotates once, causing the actuation tube to reciprocate once.

8. The suture system according to claim 7, characterized in that, The proximal end of the drive rod extends outside the housing; The rotating indicator includes a longitudinally extending indicator body and a wing-shaped grip portion disposed on the outer periphery of the indicator body. A longitudinally extending third through hole is provided in the middle of the indicator body, and the drive rod extends through the third through hole.

9. The suture system according to any one of claims 2 to 4, characterized in that, The distal end of the tube is provided with a receiving compartment, which is adapted to accommodate the receiving compartment; The receiving chamber is rotatably connected to the tube, and the receiving chamber includes a needle receiving portion configured to engage with the needle; wherein the receiving chamber has an extension position and a mating position; when the receiving chamber is in the extension position, the receiving chamber is located in the receiving chamber receiving portion; when the receiving chamber is rotated to the mating position, the needle receiving portion of the receiving chamber is located outside the tube; The control handle also includes a receiving compartment drive mechanism coupled to the receiving compartment, the receiving compartment drive mechanism being configured to switch the receiving compartment between an extended position and a mating position.

10. The suture system according to claim 9, characterized in that, The receiving compartment drive mechanism includes a wrench, a drive block, and a drive line. The wrench is rotatably connected to the housing, the drive block is coupled to the wrench, the drive line is connected to the drive block, and the drive line is connected to the receiving compartment. The wrench has a closed position and an open position, and the wrench can be rotatably switched between the closed position and the open position; When the wrench is switched from the closed position to the open position, the wrench drives the drive block and the drive line to move towards the proximal end, thereby driving the receiving compartment to switch from the extended position to the mating position; when the wrench is switched from the open position to the closed position, the wrench drives the drive block and the drive line to move towards the distal end, thereby driving the receiving compartment to switch from the mating position to the extended position.

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