Suture apparatus

Abstract

Disclosed is a suture apparatus. The suture apparatus further comprises an actuating assembly, a needle hub, a first support member, and a second support member. The first support member is movably connected to the needle hub, the needle hub is connected to a suture needle, and the actuating assembly and the needle hub are detachably connected in a direction perpendicular to the axial direction. When the suture needle extends out, a distal end of the suture needle can be connected to a suture arm. After the actuation assembly is connected to the needle hub, the first support member is located outside the needle hub, the second support member is located outside the actuating assembly, a straight line in the axial direction where the first support member is located and a straight line along the axial direction where the second support member is located are oppositely arranged in the direction perpendicular to the axial direction, and the first support member and the second support member are used for supporting the actuating assembly and the needle hub in the direction perpendicular to the axial direction. The actuating assembly and the needle hub connected to each other can axially move between the first support member and the second support member. When the first support member moves towards a proximal end, the first support member drives the needle hub to move towards the proximal end, and the needle hub drives the actuating assembly to move towards the proximal end until the actuating assembly is detached from the needle hub.

Description

Suture device Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a suturing device. Background Art

[0002] Patent foramen ovale (PFO) was previously considered a benign condition and harmless. However, recent clinical studies have led to a consensus among experts that PFO is a cause of unexplained stroke, migraines, and paradoxical embolism. Therefore, PFO closure is necessary.

[0003] In the prior art, the purpose of treatment is achieved by placing an occluder to block the foramen ovale. Existing occluders generally include an integrated occluder body composed of two occluding discs, which are respectively located on both sides of the membrane wall to achieve the function of fixing and sealing the occluder relative to the membrane wall. There is contact friction between the two occluding discs and the membrane wall, which makes it difficult to adjust the position of the occluder relative to the membrane wall, affecting the occluder's blocking effect on the membrane wall defect. In addition, the distance between the two occluding discs of the integrated occluder body is constant and cannot be adjusted. If the membrane wall is thin, the occluder may not be able to block firmly. If the membrane wall is thick, it may cause excessive squeezing and damage to the membrane wall, increasing the risk of complications. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present application provides an interventional suturing device.

[0005] The present invention solves the technical problem by the following technical solutions:

[0006] An embodiment of the present invention provides a suturing device, comprising a suturing needle, a suturing arm, and a suturing thread, wherein at least one end of the suturing thread is located on the suturing arm, and the distal end of the suturing needle can be connected to the suturing arm to pull at least one end of the suturing thread out of the suturing arm. The suturing device is characterized in that it further comprises an actuating assembly, a needle seat, a first support member, and a second support member, wherein the first support member is movably connected to the needle seat,

[0007] The needle seat is connected to the suturing needle, and the actuating assembly and the needle seat are detachably connected in a direction perpendicular to the axial direction. The actuating assembly controls the extension and retraction of the suturing needle through the needle seat. When the suturing needle is extended, the distal end of the suturing needle can be connected to the suturing arm.

[0008] When the actuating assembly and the needle seat are connected, the first support member is located outside the needle seat, and the second support member is located outside the actuating assembly. The straight line in the axial direction where the first support member is located and the straight line in the axial direction where the second support member is located are arranged opposite to each other in a perpendicular direction to the axial direction, and are used to support the actuating assembly and the needle seat in a perpendicular direction to the axial direction. The interconnected actuating assembly and the needle seat can move axially between the first support member and the second support member.

[0009] When the first support member moves toward the proximal end, the first support member drives the needle seat to move toward the proximal end, and the needle seat drives the actuating assembly to move toward the proximal end until the actuating assembly and the needle seat are disengaged.

[0010] The above-mentioned suturing device is provided with a first support member and a second support member. When the actuating assembly and the needle seat are connected, the first support member is located outside the needle seat, and the second support member is located outside the actuating assembly. The straight line in the axial direction where the first support member is located and the straight line in the axial direction where the second support member is located are arranged relative to each other in a perpendicular direction to the axial direction, and are used to support the actuating assembly and the needle seat in a perpendicular axial direction, that is, the first support member is used to support the needle seat, and the second support member is used to support the actuating assembly. The first support member, the needle seat, the actuating assembly and the second support member support each other on the same plane perpendicular to the axial direction, so that the four remain inseparable in the perpendicular axial direction, but do not affect the interconnected actuating assembly and the needle seat. The actuating assembly and the needle seat can move axially between the first support member and the second support member, thereby not affecting the axial movement of the actuating assembly to control the extension and retraction of the suturing needle; secondly, the first support member is movably connected to the needle seat, and the actuating assembly and the needle seat are detachably connected in a perpendicular axial direction. When the first support member moves toward the proximal end, the first support member drives the needle seat to move proximally. When the needle holder is in a state of being moved out of the body, the first support member, the needle seat, the actuating assembly and the second support member still support each other on the same plane perpendicular to the axial direction. Even if there is axial displacement between the four, the four remain inseparable in the direction perpendicular to the axial direction, and the needle seat can drive the actuating assembly to move proximally. Since the actuating assembly controls the extension and retraction of the suture needle through the needle seat, the actuating assembly and the needle seat can first drive the actuating assembly to move proximally before disengaging, which can reduce the interference of the actuating assembly with other components of the suturing device and improve the operating performance; again, by arranging the needle seat to be connected to the suture needle, the actuating assembly and the needle seat can be disengaged, so that not only the suture needle with the suture thread (that is, the suture needle with the suture thread that has completed the suturing action in the body) that has been taken out of the body can be pulled out of the body, and the suture needle can be pulled out of the body, and the part of the suture thread connected to the suture needle can be withdrawn from the body, which is convenient for the operator to send the knotter into the body along the part of the suture thread withdrawn from the body, or the part of the suture thread withdrawn from the body can be directly knotted and pushed into the body to complete the suture fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0012] FIG1 is a schematic structural diagram of a suturing device or a conveying device according to an embodiment;

[0013] FIG2 is a partial structural diagram of a suturing device or a conveying device having a suturing arm in an expanded state according to one embodiment;

[0014] FIG3 is a schematic diagram of an exploded structure of a suturing device or a conveying device according to an embodiment;

[0015] FIG4 is an enlarged structural diagram of part A in FIG3 ;

[0016] FIG5 is a schematic diagram of a partial structure of a suturing device or a conveying device according to an embodiment;

[0017] FIG6 is a partial structural cross-sectional view of a suturing device or a conveying device having a first control member in an initial state according to one embodiment;

[0018] FIG7 is a partial structural cross-sectional view of a suturing device or a delivery device having a first control member in a locked state according to one embodiment;

[0019] FIG8a is a schematic structural diagram of a slider assembly 8 according to an embodiment; FIG8b is a schematic exploded structural diagram of a slider assembly 8 according to an embodiment of the present invention;

[0020] FIG9 is a simplified structural diagram showing the motion relationship between the first control member and the first connecting member according to an embodiment;

[0021] FIG10 is a simplified structural diagram showing the motion relationship between the first control member and the first connecting member according to another embodiment;

[0022] FIG11 is a schematic diagram of a partial structure of a suturing device or a conveying device according to an embodiment;

[0023] FIG12a is a schematic cross-sectional view of a portion of the structure of a suturing device or a conveying device having a first control member in an initial state according to one embodiment; FIG12b is a schematic cross-sectional view of a portion of the structure of a suturing device or a conveying device having a first control member in a locked state according to one embodiment;

[0024] FIG13 is a partial structural diagram of a suturing device or a conveying device with a suturing arm in an expanded state according to another embodiment;

[0025] FIG14 is a schematic diagram of a partial structure of a suturing device or a conveying device according to an embodiment;

[0026] FIG15a is a schematic cross-sectional view of a portion of the structure of a suturing device or a conveying device according to an embodiment at a certain moment; FIG15b is a schematic cross-sectional view of a portion of the structure of a suturing device or a conveying device according to an embodiment at another moment; FIG15c is a schematic cross-sectional view of a portion of the structure of a suturing device or a conveying device according to an embodiment at yet another moment;

[0027] FIG16a is a schematic diagram of a portion of the structure of a suturing device or a conveying device according to an embodiment from one perspective; FIG16b is a schematic diagram of a portion of the structure of a suturing device or a conveying device according to an embodiment from another perspective; FIG16c is a schematic diagram of a portion of the structure of a suturing device or a conveying device according to an embodiment from yet another perspective;

[0028] FIG17a is a schematic cross-sectional view of a portion of the structure of a suturing device or a delivery device according to an embodiment; FIG17b is a schematic view of a portion of the structure in FIG17a;

[0029] FIG18a is a schematic cross-sectional view of a portion of the structure of a suturing device or a conveying device according to an embodiment; FIG18b is a schematic view of the structure of the thread cutter in FIG18a from one perspective; FIG18c is a schematic view of the structure of the thread cutter in FIG18a from another perspective;

[0030] FIG19a is a schematic diagram of the structure of the first control member in an initial state and the cable drum in accordance with one embodiment; FIG19b is a schematic diagram of the structure of the first control member in a locked state and the cable drum in accordance with one embodiment; FIG19c is a schematic diagram of the connection between the cable drum and the suture thread in accordance with one embodiment;

[0031] FIG20 is an enlarged structural diagram of part B in FIG3 ;

[0032] FIG21 is an exploded schematic diagram of a portion of the structure of a suturing device or a delivery device according to an embodiment;

[0033] FIG22a is a schematic structural diagram of a first control member in an initial state according to an embodiment; FIG22b is a schematic structural diagram of a first control member in a locked state according to an embodiment;

[0034] FIG23a is a schematic cross-sectional view of a portion of the structure of a suturing device or a conveying device having a first control member in an initial state according to one embodiment; FIG23b is a schematic cross-sectional view of the first control member in FIG23a in an initial state; FIG23c is a schematic cross-sectional view of a portion of the structure of a suturing device or a conveying device having a first control member in a locked state according to one embodiment; FIG23d is a schematic cross-sectional view of the first control member in FIG23c in a locked state;

[0035] FIG24 is a schematic cross-sectional view of a portion of the structure of a suturing device or a delivery device according to an embodiment;

[0036] FIG25a is a schematic diagram of a partial structure of a suturing device or a delivery device according to an embodiment; FIG25b is a schematic diagram of the knob in FIG25a;

[0037] FIG26a is a schematic diagram of a partial structure of a suturing device or a conveying device according to an embodiment; FIG26b is a schematic diagram of a partial structure of FIG26a;

[0038] FIG27 is an exploded schematic diagram of a portion of the structure of a suturing device or a delivery device according to an embodiment;

[0039] FIG28 is a schematic diagram of a receiving structure according to an embodiment;

[0040] Figure 29a is a schematic diagram of the state of the suture line at a certain moment in the process of suturing the foramen ovale by a suturing device or a conveying device according to one embodiment; Figure 29b is a schematic diagram of the state of the suture line at a certain moment in the process of suturing the foramen ovale by a suturing device or a conveying device according to one embodiment; Figure 29c is a schematic diagram of the state of the suture line at a certain moment in the process of suturing the foramen ovale by a suturing device or a conveying device according to one embodiment. Specific embodiments

[0041] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0042] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0043] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0044] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the exemplary embodiments.

[0045] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0046] It should be noted that the terms "distal" and "proximal" are commonly used in the field of interventional medical devices. "Distal" refers to the end away from the operator during surgery, while "proximal" refers to the end closer to the operator. Axial refers to the direction parallel to the line connecting the distal and proximal centers of the medical device; radial refers to the direction perpendicular to the axial direction.

[0047] The suturing device in the embodiment of the present invention includes but is not limited to being used for suturing patent foramen ovale, edge-to-edge suturing and repair of valves, suturing and repairing chordae tendineae, suturing blood vessels, etc.

[0048] 1 and 2 , this embodiment provides a suturing device 100, comprising a handle 1 and a sheath 2 connected to each other. The suturing device 100 also comprises a suturing needle 3, a suturing arm 4 and a suture 5, at least one end of the suture 5 can be located on the suturing arm 4, and the suturing arm 4 has a conveying state and an unfolding state that can be converted to each other. When in the unfolding state, the distal end of the suturing needle 3 can be connected to the suturing arm 4, and at least one end of the suture 5 can be pulled out from the suturing arm 4. The suturing needle 3 and the suture 5 are arranged in the sheath 2, the suturing arm 4 is arranged at the distal end or near the distal end of the sheath 2, and the proximal end of the suturing needle 3 is arranged on the handle 1. FIG1 shows the conveying state of the suturing arm 4, the suturing arm 4 has not yet been unfolded, and the suturing needle 3 has not yet been extended; FIG2 shows the unfolding state of the suturing arm 4, the suturing needle 3 has been extended, and the distal end of the suturing needle 3 is about to be connected to the suturing arm 4.

[0049] Referring to Figures 3 to 7, in one embodiment, the suturing device 100 further includes a first connecting member 6, a second connecting member 7, a slider assembly 8, and a first control member 9. As shown in Figures 8a and 8b, the slider assembly 8 includes a first slider 81, a second slider 82, and an elastic member 83 that are interconnected. The second slider 82 and the elastic member 83 are axially arranged within the first slider 81, and the second slider 82 and the first slider 81 are movable relative to each other. As shown in Figures 4, 6, and 7, the two ends of the first connecting member 6 are respectively connected to the first slider 81 and the first control member 9, and the two ends of the second connecting member 7 are respectively connected to the suturing arm 4 and the second slider 82. The first control member 9 controls the movement of the first slider 81, and the first slider 81 drives the movement of the second slider 82 via the elastic member 83, thereby controlling the movement of the suturing arm 4, that is, switching from the conveying state to the deployed state.

[0050] The first control member 9 has an initial state and a locked state. FIG6 shows the first control member 9 in the initial state, and FIG7 shows the first control member 9 in the locked state. During the movement of the first control member 9 from the initial state to the locked state, the suturing arm 4 is converted from the conveying state to the deployed state. The first control member 9 drives the first slider 81 to move axially in the first direction a via the first connecting member 6, forming a first movement stroke relative to the handle housing. The first slider 81 drives the second slider 82 to move axially in the first direction a via the elastic member 83, forming a second movement stroke relative to the handle housing. The first movement stroke is greater than the second movement stroke, so that the elastic member 83 can generate elastic deformation within the first slider 81.

[0051] In this embodiment, referring to Figures 2 and 4, the suturing arm 4 is converted from the conveying state to the deployed state by moving the second connecting member 7 along the first direction a, driving the suturing arm 4 to move in the first direction a along the slide rail 11 on the inner wall of the sheath tube 2. The sheath tube 2 is also provided with an opening 12, so that the suturing arm 4 can slowly deploy through the opening 12 during the movement until the suturing arm 4 moves to abut against the inner wall of the opening 12 on the sheath tube 2. In this embodiment, the first direction a is from the distal end to the proximal end. In other embodiments, the first direction a can also be from the proximal end to the distal end.

[0052] It can be understood that since the second slider 82 is connected to the suturing arm 4 through the second connecting member 7, the second slider 82 moves axially in the first direction a, driving the second connecting member 7 and the suturing arm 4 to move axially in the first direction a until the suturing arm 4 moves to abut the inner wall of the opening 12 on the sheath 2. At this time, the second connecting member 7 and the suturing arm 4 can no longer move in the first direction a, and the suturing arm 4 is in an expanded state. It can be considered that the first control member 9 is in a pre-locking state at this time. The pre-locking state is a state between the initial state and the locked state. In the pre-locking state, the second slider 82 connected to the second connecting member 7 is also stationary relative to the outer shell because the second connecting member 7 cannot continue to move in the first direction a, that is, the second slider 82 has completed the second movement stroke. However, at this time, because the suturing arm 4 can still be restored to the conveying state under the action of external force, the suturing arm 4 is not in a true locked state, and the first control member 9 has only reached the pre-locking state but not the locked state. Next, if the first control member 9 continues to be moved along the original direction, the first connecting member 6 can drive the first slider 81 to continue to move axially in the first direction a, and finally the first movement stroke is greater than the second movement stroke, thereby causing the elastic member 83 between the first slider 81 and the second slider 82 to produce elastic deformation in the first slider 81. When the first control member 9 reaches the locked state, a force balance can be achieved between the force applied to the first slider 81 by the first control member 9 in the locked state, the force applied to the first slider 81 by the elastic member that generates the above-mentioned elastic deformation, and the friction force applied to the first slider 81 by the handle housing 10, so that the first control member 9, the first connecting member 6, the first slider 81, the elastic member 83, and the second slider 82 can all remain stationary relative to the handle housing 10, that is, the first control member 9, the first connecting member 6, the first slider 81, the elastic member 83, and the second slider 82 can remain relatively fixed, which can prevent the suturing arm 4 from rebounding back to the conveying state or an uncertain state between the conveying state and the unfolded state, thereby achieving relative fixation of the suturing arm 4 and the handle housing 10, that is, by locking the first control member 9, the suturing arm 4 in the unfolded state is locked, and the second slider 82 is prevented from moving uncertainly under the action of unexpected external force, thereby facilitating the connection between the suturing needle 3 and the suturing arm 4 and improving the success rate of the operation.

[0053] It is understood that the elastic member 83 may have a small initial compressive elastic deformation before the above-mentioned elastic deformation occurs. The elastic member 83 with the initial elastic deformation is placed in the first slider 81, and its two ends are respectively connected to the first slider 81 and the second slider 82. Due to the small initial elastic deformation, it cannot offset the static friction of the first slider 81 and the second slider 82, and cannot drive the suturing arm 4 to move. Therefore, before the above-mentioned elastic deformation occurs, it cannot drive the second slider 82 and the suturing arm 4 to move, so that the suturing arm 4 remains in the conveying state. In other embodiments, the elastic member 83 may be in a natural state before the above-mentioned elastic deformation occurs, without the initial elastic deformation. In this case, the elastic member may be located on the proximal side of the second slider, or on the distal side of the second slider. In other embodiments, the elastic member 83 may have a small initial tensile elastic deformation before the above-mentioned elastic deformation occurs. In this case, the second slider may be located on the distal side of the elastic member, with the proximal end of the elastic member connected to the first slider and the distal end of the elastic member connected to the second slider.

[0054] In this embodiment, referring to FIG5 , the first control member 9 includes a first operating portion 91 and a main body 92 connected to each other. The first operating portion 91 is for operation by an operator. Rotating the first operating portion 91 causes the main body 92 to rotate. The first connecting member 6 is connected to the main body 92. In other embodiments, the first operating portion 91 may not be provided, and the main body 92 may be rotated directly. When locking is required, the main body 92 may be locked using a separate locking member or manually.

[0055] Refer to Figure 9, which illustrates the trajectory of the first control member 9 from its initial state to its locked state. The connection point between the first connector 6 and the main body 92 is 61, and the connection point between the first connector 6 and the first slider 81 is 62. As the main body 92 rotates, the connection point 61 between the first connector 6 and the main body 92 rotates along direction b, moving from 61a to 61b and finally to 61c. Connection point 61 moves in a circular arc on the main body 92, forming an arc path S. The connection point 62 between the first connector 6 and the first slider 81 moves axially, from 62a to 62b and finally to 62c. This design converts circular motion into linear motion, enhancing operability and user experience.

[0056] Specifically, the arc path S includes a starting end 61a and an ending end 61c, and the arc path S also includes a transition point 61b, which is located between the starting end 61a and the ending end 61c in the arc path S. When the end of the first connecting member 6 connected to the main body 92 of the first control member 9 is located at the transition point 61b, the axial distance between the central rotation point O of the main body 92 of the first control member 9 and the first slider 81 is the largest. At this time, the axial movement distance of the first slider 81 is the farthest, and the degree of elastic deformation of the elastic member 83 is the largest. However, at this time, the first The control member 9 has not reached the locked position, that is, it has not reached the locked state. The first control member 9 continues to move in the original direction, driving the first slider 81 to move in the direction opposite to the first direction a. At this time, the elastic deformation degree of the elastic member 83 becomes slightly smaller until the first control member 9 reaches the locked position. In the locked position, the first control member 9 is limited or locked by other components (such as the handle housing), so that the elastically deformed elastic member 83 cannot drive the first slider 81 to move in the direction opposite to the first direction a, thereby ensuring the locked state of the first control member 9. It can be understood that the above-mentioned "elastically deformed elastic member 83 applies force to the first slider 81, thereby driving the first slider 81 to move in a direction opposite to the first direction a". In this process, even if the first slider 81 has moved a distance in the direction opposite to the first direction a, as long as the first movement stroke is still greater than the second movement stroke, that is, the distance the first slider 81 moves in the first direction a is still greater than the distance the second slider 82 moves in the first direction a, the elastic deformation force of the elastic member 83 still acts on the second slider 82 in the first direction a, so that the second slider 82 remains stationary and the suture arm 4 connected to the second slider 82 remains in the expanded state.

[0057] In FIG9 , in the pre-locked state, the connection point between the first connector 6 and the main body 92 is located at a pre-locking point 61e, which can be located between the starting end 61a and the transition point 61b in the arc path S. As the connection point between the first connector 6 and the main body 92 moves from the starting end 61a to the pre-locking point 61e, the first slider 81 drives the second slider 82 to move together until the second slider 82 completes the second movement stroke, thereby driving the suturing arm 4 from the delivery state to the deployed state. However, the suturing arm 4 cannot be locked in the deployed state because there is no special locking member other than the handle housing 10 to resist it. Therefore, it can still move toward the delivery state under unexpected external forces. As the connection point between the first connector 6 and the main body 92 moves from the pre-locking point 61e to the terminal end 61c, the elastic member 83 elastically deforms within the first slider 81 until the first control member 9 is in the locked state. At this time, the suturing arm 4 is also locked and cannot move relative to the handle housing 10. Therefore, the first control member 9 can only be locked when the connection point between the first connecting member 6 and the main body 92 is located behind the pre-locking point 61e. It can be understood that the transition point 61b is located between the pre-locking point 61e and the terminal end 61c.

[0058] 3 and 5 , the handle 1 includes a handle housing 10, a slider assembly 8, a first connector 6, and a main body 92 disposed within the handle housing 10, and a first operating portion 91 passing through the handle housing 10 and disposed outside the handle housing 10. As shown in FIG5 , when the first operating portion 91 is in a locked state, the first operating portion 91 abuts against the handle housing 10. Specifically, referring to FIG5 , FIG11 and FIG19 a , the first operating portion 91 includes a first arm 911, a second arm 912, and a connecting arm 913. The connecting arm 913 connects one end of the first arm 911 and one end of the second arm 912, respectively. The other end of the first arm 911 and the other end of the second arm 912 are respectively connected to the main body 92. An operator can hold the connecting arm 913 to operate the movement of the first operating portion 91. The connecting arm 913 is used to abut against the handle housing 10.

[0059] 7 and 9 , the first control member 9 continues to rotate in direction b until it abuts against the handle housing 10. The handle housing 10 prevents the first control member 9 from further rotating in direction b. Furthermore, the force generated by the elastic deformation of the elastic member 83 also prevents the first control member 9 from rotating in a direction opposite to direction b, thereby achieving a force balance and locking the first control member 9. In other embodiments, locking the first control member 9 can also be achieved by separately providing a locking member that is connected and locked to the first control member 9.

[0060] 9 , in the present embodiment, since no locking member other than the handle housing is separately designed to lock the first control member 9, the first control member 9 is locked mainly by the handle housing 10 and the first control member 9 being counteracted with each other. In addition, when operating the first control member 9, the first control member 9 needs to be rotated from the initial state to the locked state, and the end of the first connecting member 6 connected to the first control member 9 makes an arc motion on the first control member 9. Therefore, in the present embodiment, when the first control member 9 is in the locked state, the end of the first connecting member 6 connected to the main body 92 of the first control member 9 needs to be located at the transition point 61b or at a position after the transition point 61b (for example, 61c) to ensure the locking performance. If the end of the first connecting member 6 connected to the main body 92 of the first control member 9 is located at a point Q before the transition point 61b without applying external force to the first control member 9, through the force analysis diagram, at point Q, the elastic member 83 that produces elastic deformation generates a force F on the main body 92 of the first control member 9 through the first connecting member 6. The force F has a component F1 in the circumferential direction and in the direction opposite to the direction b. The component F1 can drive the end of the first connecting member 6 connected to the main body 92 of the first control member 9 to move in the direction opposite to the direction b, which can easily make the end of the first connecting member 6 connected to the main body 92 of the first control member 9 return to the starting end 61a. Therefore, the force balance cannot be achieved at point Q, and the first control member 9 cannot reach the locked state.

[0061] The main body 92 has a central rotation point O, and the main body 92 rotates around the central rotation point O. When the end of the first connecting member 6 connected to the main body 92 of the first control member 9 is located at the transition point 61b, the connection point 61b between the first connecting member 6 and the main body 92, the connection point 62b between the first connecting member 6 and the first slider 81, and the central rotation point O are on the same straight line.

[0062] In other embodiments, when the first control member 9 reaches the locked position, the end of the first connecting member 6 connected to the main body 92 of the first control member 9 may also be exactly located at the transition point 61b, that is, the terminal end 61c coincides with the transition point 61b.

[0063] In Figure 9 , the first connecting member 6 is in a straight line shape as a whole. In one embodiment, referring to Figure 10 , the first connecting member 6 can be in a broken line shape as a whole. In other embodiments, the first connecting member 6 can also be in a curved line shape as a whole.

[0064] In one embodiment, the two ends of the first connecting member 6 are pivotally connected to the first control member 9 and the first slider 81 respectively, thereby having a more flexible connection method, which is conducive to the first connecting member 6 being connected to the first control member 9 and the first slider 81 at different angles, thereby facilitating the relative movement between the first control member 9, the first connecting member 6 and the first slider 81.

[0065] In one embodiment, referring again to Figures 7 and 8b, the second slider 82 is arranged in the first slider 81, and the fixing column 84 is arranged in the second slider 82. The proximal end of the second connecting member 7 first penetrates the first slider 81, then enters the second slider 82, passes through the fixing column 84, and then passes out of the second slider 82. By rotating the fixing column 84, the second connecting member 7 is wrapped around the fixing column 84, and finally the fixing column 84 is fixed with a screw 85, thereby fixing the second connecting member 7 to the second slider 82.

[0066] In one embodiment, the first direction a is the direction of movement from the first end to the second end. Referring to Figures 6 and 7, in this embodiment, the first direction a is from the distal end to the proximal end. The elastic member 83 is a compression-type elastic member, and the elastic member 83 is disposed within the first slider 81 on a side near the distal end. A compression-type elastic member (e.g., a compression spring) can be understood as compressing the elastic member, causing it to shorten and deform. The elastic member has a tendency to recover from the deformation, thereby storing deformation energy. In another embodiment, the elastic member 83 is a tension-type elastic member, and the elastic member 83 is disposed within the first slider 81 on a side near the proximal end. A tension-type elastic member (e.g., a tension spring) can be understood as stretching the elastic member, causing it to elongate and deform. The elastic member has a tendency to recover from the deformation, thereby storing deformation energy. It is understood that the first direction a can also be from the proximal end to the distal end.

[0067] The suturing device 100 includes a first control assembly (or suturing arm control assembly) 101 and a second control assembly (or needle seat control assembly) 102. Referring to Figures 6 and 7, the first control assembly 101 includes the first connecting member 6, the second connecting member 7, the slider assembly 8 and the first control member 9. The first control assembly 101 is used to control the mutual conversion of the suturing arm 4 between the conveying state and the deployed state; referring to Figures 2, 3, 11 and 12, the second control assembly 102 is connected to the suturing needle 3 and is used to control the extension and retraction of the suturing needle 3. When the suturing needle 3 is extended, the distal end of the suturing needle 3 can be connected to the suturing arm 4.

[0068] The first control member 9 has an axially extending through-hole 93. When the first control member 9 is in a locked state, the second control member 102 penetrates the through-hole 93 and moves axially. When the first control member 9 is in an initial state, the second control member 102 is prevented from penetrating the through-hole 93, thereby restricting the axial movement of the second control member 102. This arrangement ensures that the suture needle 3 can be extended and connected to the suture arm 4 only when the suture arm 4 is in an expanded state. This ensures that the suture arm 4 must be expanded first before the suture needle 3 is extended, preventing the suture needle 3 from being extended before the suture arm 4 is expanded, thereby preventing the suture needle 3 from damaging tissue in the body.

[0069] In this embodiment, the first control component 9 is arranged on the distal side of the second control component 102, and the second control component 102 drives the suture needle 3 to extend distally, so that the distal end of the suture needle 3 passes through the through hole 93 and extends from the proximal end of the suture arm 4, further pulling at least one end of the suture thread 5 out from the suture arm 4.

[0070] In another embodiment, referring to FIG13 , the distal end of the suture needle 3 can be restrained by the sheath 2 in the delivery state, and the second control assembly 102 drives the suture needle 3 to move proximally until it reaches the opening 12. The distal end of the suture needle 3 extends outward and assumes an outward-turned shape. The second control assembly 102 continues to drive the suture needle 3 proximally until the suture needle 3 is connected to the suture arm 4. The second control assembly 102 further drives the suture needle 3 proximally, and the distal end of the suture needle 3 is retracted in the direction C, thereby disengaging from the suture arm 4 and withdrawing at least one end of the suture thread 5 on the suture arm 4 until the distal end of the suture needle 3 reenters the sheath 2 and the outward-turned distal end of the suture needle 3 is straightened. It will be understood that in this embodiment, the first control member 9 is disposed on the proximal side of the second control assembly 102. Only when the first control member 9 is in the locked state can the proximal end of the second control assembly 102 penetrate the through hole 93 and perform axial movement.

[0071] Referring to Figures 3, 12a, 12b and 14, the second control assembly 102 includes a first gear 1021, a first rack 1022 and a needle seat 103. The first gear 1021 and the first rack 1022 are meshed with each other. The needle seat 103 is connected to the suture needle 3 and the first rack 1022 respectively. The first gear 1021 is rotated to drive the needle seat 103 axially through the first rack 1022 to control the extension and retraction of the suture needle 3. When the suture needle 3 is extended, the distal end of the suture needle 3 is connected to the suture arm 4, thereby achieving the precise movement of the control suture needle 3 and improving operability. Further, the second control assembly 102 also includes a second operating part (or gear operating part) 1023, the second operating part 1023 is connected to the first gear 1021, and the second operating part 1023 is operated to drive the first gear 1021 to rotate.

[0072] In one embodiment, the first rack 1022 includes an engagement section 10221 and a connecting section 10222. The engagement section 10221 and the connecting section 10222 are axially connected, the engagement section 10221 cooperates with the first gear 1021, and the connecting section 10222 is connected to the proximal end of the suturing needle 3. The engagement section 10221 is a groove structure on the first rack 1022, and the first gear 1021 is restricted in movement within the groove structure.

[0073] In one embodiment, the first rack 1022 includes a penetration section 10223 and an engagement section 10221. The penetration section 10223 is axially connected to the engagement section 10221. The engagement section 10221 cooperates with the first gear 1021. The penetration section 10223 is used to penetrate the through hole 93 of the first control member 9 in Figure 12.

[0074] In another embodiment, the first rack 1022 may include an engaging segment 10221 , a connecting segment 10222 , and a penetrating segment 10223 , which are axially connected in sequence.

[0075] In one embodiment, in combination with Figures 2, 3, 13 and 14, the suture needle 3 includes a first suture needle 31 and a second suture needle 32, and the needle seat 103 includes a first needle seat 1031 and a second needle seat 1032. The first suture needle 31 is connected to the first needle seat 1031, and the second suture needle 32 is connected to the second needle seat 1032. The second control component 102 also includes a second gear 2021 and a second rack 2022 that cooperate with each other. By rotating the first gear 1021, the first needle seat 1031 is driven to move axially through the first rack 1022 to control the extension and retraction of the first suture needle 31; by rotating the second gear 2021, the second needle seat 1032 is driven to move axially through the second rack 2022 to control the extension and retraction of the second suture needle 32, so that the first suture needle 31 and the second suture needle 32 can be operated separately, which is more flexible and improves operability.

[0076] 3 and 14 , the first rack 1022 and the second rack 2022 are arranged side by side in the handle housing 10, and the first gear 1021 and the second gear 2021 are connected by a connecting rod 3021, which passes through the first gear 1021 and the second gear 2021. Both ends of the connecting rod 3021 are fixed to the handle housing 10, and the first gear 1021 and the second gear 2021 rotate around the connecting rod 3021 respectively.

[0077] In one embodiment, referring to Figures 15a, 15b and 15c, the suturing device 100 also includes an actuating assembly 304, a first support member 301 and a second support member 302. The first support member 301 is movably connected to the needle seat 103. The actuating assembly 304 is used to control the extension and retraction of the suture needle 3 into the sheath. When the suture needle 3 is extended, the distal end of the suture needle 3 is connected to the suturing arm 4, and the needle seat 103 is connected to the suture needle 3. The actuating assembly 304 and the needle seat 103 are detachably connected in a direction perpendicular to the axial direction.

[0078] When the actuating assembly 304 and the needle hub 103 are connected, the first support member 301 is located outside the needle hub 103, and the second support member 302 is located outside the actuating assembly 304. The axial straight line M of the first support member 301 and the axial straight line N of the second support member 302 are arranged perpendicularly to the axial direction, and are used to support the actuating assembly 304 and the needle hub 103 in the perpendicular axial direction. The interconnected actuating assembly 304 and the needle hub 103 can move axially between the first support member 301 and the second support member 302. When the first support member 301 moves proximally, the first support member 301 drives the needle hub 103 to move proximally, and the needle hub 103 drives the actuating assembly 304 to move proximally until the actuating assembly 304 and the needle hub 103 are separated. After the separation, the first support member 301 can still drive the needle hub 103 to continue to move proximally.

[0079] In this embodiment, the actuating assembly 304 may include a first gear 1021 and a first rack 1022 that mesh with each other. In this case, the first rack 1022 and the needle hub 103 are detachably connected in a direction perpendicular to the axial direction. When the first rack 1022 and the needle hub 103 are connected (as shown in FIG15 a ), the first support member 301 is located outside the needle hub 103 (i.e., below the needle hub 103 as shown in the figure), and the second support member 302 is located outside the first rack 1022 (i.e., above the first rack 1022 as shown in the figure). The axial line M of the first support member 301 and the axial line N of the second support member 302 are arranged relative to each other in a direction perpendicular to the axial direction to support the first rack 1022 and the needle hub 103 in a direction perpendicular to the axial direction, thereby allowing the interconnected first rack 1022 and the needle hub 103 to move axially between the first support member 301 and the second support member 302. When the first support member 301 moves proximally, the first support member 301 drives the needle seat 103 to move proximally, and the needle seat 103 drives the first rack 1022 to move proximally until the first rack 1022 and the needle seat 103 are disengaged. After the two are disengaged, the first support member 301 can still drive the needle seat 103 to continue moving proximally.

[0080] In other embodiments, the actuating assembly 304 may not adopt the gear rack engagement method. The actuating assembly 304 may be a connecting structure. By pulling or pushing the connecting structure, the axial actuation function is realized to control the extension and retraction of the suture needle 3. The connecting structure may be a rod-shaped, block-shaped or other structure.

[0081] In this embodiment, first, this embodiment is provided with a first support member 301 and a second support member 302. When the actuating assembly 304 and the needle seat 103 are connected, the first support member 301 is located outside the needle seat 103, and the second support member 302 is located outside the actuating assembly 304. The straight line M in the axial direction where the first support member 301 is located and the straight line N in the axial direction where the second support member 302 is located are arranged relative to each other in a perpendicular direction to support the actuating assembly 304 and the needle seat 103 in a perpendicular direction. That is, the first support member 301 is located outside the needle seat 103. 01 is used to support the needle seat 103, and the second support member 302 is used to support the actuating assembly 304. The first support member 301, the needle seat 103, the actuating assembly 304 and the second support member 302 support each other on the same plane perpendicular to the axial direction, so that the four remain inseparable in the perpendicular axial direction, but do not affect the interconnected actuating assembly 304 and the needle seat 103. The actuating assembly 304 and the needle seat 103 can move axially between the first support member 301 and the second support member 302, thereby not affecting the axial movement of the actuating assembly to control the extension and retraction of the suture needle 3.

[0082] Secondly, the first support member 301 is movably connected to the needle seat 103, and the actuating assembly 304 and the needle seat 103 are detachably connected in a direction perpendicular to the axial direction. When the first support member 301 moves toward the proximal end, the first support member 301 drives the needle seat 103 to move proximally. At this time, the first support member 301, the needle seat 103, the actuating assembly 304 and the second support member 302 still support each other on the same plane perpendicular to the axial direction. Even if there is axial displacement between the four, the four remain inseparable in the direction perpendicular to the axial direction, and the needle seat 103 can drive the actuating assembly 304 to move proximally. Since the actuating assembly 304 controls the extension and retraction of the suture needle 3 through the needle seat 103, before the actuating assembly 304 and the needle seat 103 are separated, the needle seat 103 can first drive the actuating assembly 304 to move proximally, thereby reducing the interference of the actuating assembly 304 on other components of the suturing device 100 and improving the operational performance.

[0083] Again, by setting the needle seat 103 to be connected with the suture needle 3, the actuating assembly 304 and the needle seat 103 can be disengaged, so that not only the suture needle 3 with the suture thread 5 (that is, the suture needle 3 with the suture thread 5 that has completed the suturing action in the body) can be pulled out of the body, but also the part of the suture thread 5 connected to the suture needle 3 can be withdrawn from the body by pulling the suture needle 3 out of the body, making it convenient for the operator to send the knotter into the body along the part of the suture thread 5 pulled out of the body, or the part of the suture thread 5 pulled out of the body can be directly knotted and pushed into the body to complete the suture fixation.

[0084] The above-mentioned "being able to first drive the actuating assembly 304 to move toward the proximal end, and being able to reduce the interference of the actuating assembly 304 with other components of the suturing device 100" is applied to specific embodiments, including but not limited to the following situations: Referring to Figure 12b, when the first control member 9 is in the locked state, the first rack 1022 of the second control member 102 penetrates the through hole 93 and moves axially until the second control member 102 controls the suturing needle 3 to complete the suturing action. At this time, it is necessary to extract the first rack 1022 from the through hole 93, that is, it is necessary to drive the first rack 1022 to move toward the proximal end, so that the first control member 9 can restore the initial state, thereby restoring the suturing arm 4 to the conveying state, so that it can be easily withdrawn from the body. Therefore, in the process of withdrawing the suturing needle, the actuating assembly 304 can be driven to move toward the proximal end, which can reduce the interference of the actuating assembly 304 with other components of the suturing device 100, and has practical significance.

[0085] In one embodiment, referring to Figures 16a, 16b, and 16c, the suturing device 100 further includes a sleeve-like structure 401, which includes a first support member 301. The sleeve-like structure 401 is movably connected to the needle hub 103. The proximal end of the needle hub 103 is disposed within the sleeve-like structure 401, and the distal end of the needle hub 103 can extend out of or into the sleeve-like structure 401. The first support member 301 can be a side wall of the sleeve-like structure 401, or can be an element disposed on the side wall of the sleeve-like structure 401.

[0086] In an embodiment, one of the sleeve structure 401 and the needle hub 103 is provided with a through-hole structure 1030, and the other of the two is provided with a fixing structure 1033. The fixing structure 1033 is constrained to move within the through-hole structure 1030, thereby achieving a movable connection between the sleeve structure 401 and the needle hub 103, that is, a movable connection between the first support member 301 and the needle hub 103. In one embodiment, the sleeve structure 401 is provided with an elongated through-hole structure 1030, and the needle hub 103 is provided with the fixing structure 1033. The fixing structure 1033 is a hook-shaped structure 10331. The hook structure 10331 can abut against the inner wall 10301 of the through-hole structure 1030, so that the hook structure 10331 is constrained to move axially within the elongated through-hole structure 1030. In another embodiment, referring to Figures 17a and 17b, a fixing structure 1033 is provided on the sleeve structure 401. This fixing structure 1033 is a rod-shaped structure 10332. The needle hub 103 is provided with an elongated through-hole structure 1030. This rod-shaped structure 10332 is inserted into the elongated through-hole structure 1030 and can abut against the inner wall 10301 of the through-hole structure 1030, so that the rod-shaped structure 10332 is constrained within the elongated through-hole structure 1030 for axial movement. If multiple needle hubs 103 are provided, multiple fixing structures 1033 can be provided, each constrained in a different through-hole structure 1030, to achieve independent movement of the multiple needle hubs 103.

[0087] In other embodiments, the first support member 301 may not be provided on the sleeve-shaped structure 401 , and the first support member 301 may be a planar structure, such as a flat plate, rod, bar, or block of various shapes, etc. A connector is provided on the planar structure to be movably connected to the needle seat 103 .

[0088] Referring to FIG3 , the handle includes a detachably connected handle housing 10 and a sleeve-like structure housing 13. Referring to FIG16 and FIG17a , the sleeve-like structure housing 13 is connected to the sleeve-like structure 401 and disposed outside the sleeve-like structure 401. The sleeve-like structure housing 13 is provided with a connector 131, which is inserted into the handle housing 10, thereby securely connecting the handle housing 10 and the sleeve-like structure housing 13. A slit 132 is provided in the sleeve-like structure housing 13 at the location where the connector 131 is disposed. This slit 132 allows the location of the sleeve-like structure housing 13 where the connector 131 is disposed to move relative to other locations within the sleeve-like structure housing 13. When the handle housing 10 and the sleeve-like structure housing 13 need to be fixed together, the position where the connecting piece 131 is provided in the sleeve-like structure housing 13 is pressed inward perpendicularly to the axial direction, so that the connecting piece 131 can be easily inserted into the handle housing 10. After the connecting piece 131 is inserted into the handle housing 10, the connecting piece 131 can be restored to its original shape outward perpendicularly to the axial direction, so that it can be mutually engaged with the handle housing 10 in the perpendicular axial direction to achieve the fixation between the handle housing 10 and the sleeve-like structure housing 13. When the sleeve-like structure housing 13 needs to be released from the handle housing 10, the position where the connecting piece 131 is provided in the sleeve-like structure housing 13 is pressed inward perpendicularly to the axial direction, so that the connecting piece 131 can be easily released from the handle housing 10, and then the sleeve-like structure housing 13 is pulled out to achieve release.

[0089] 15a, 15b, and 15c, in one embodiment, the second support member 302 is disposed on the inner wall of the handle housing 10. A first groove 3041 is disposed on the actuating assembly 304, and the second support member 302 is receivable within the first groove 3041. When the first support member 301 moves proximally, the first support member 301 drives the needle seat 103 proximally, and the needle seat 103 drives the actuating assembly 304 proximally until the second support member 302 is receivable within the first groove 3041, disengaging the actuating assembly 304 from the needle seat 103. Specifically, as shown in FIG15a , at this point, the sleeve-like housing 13 and the handle housing 10 have not yet been disengaged, and the second support member 302 is not received in the first groove 3041. The first support member 301, the needle hub 103, the actuating assembly 304, and the second support member 302 support each other in the same plane perpendicular to the axial direction. The interconnected actuating assembly 304 and the needle hub 103 can move axially between the first support member 301 and the second support member 302. As shown in FIG15b , at this point, the sleeve-like housing 13 is pulled proximally, disengaging the sleeve-like housing 13 from the handle housing 10. However, the second support member 302 is not received in the first groove 3041. The first support member 301, the needle hub 103, the actuating assembly 304, and the second support member 302 still support each other in the same plane perpendicular to the axial direction. At this point, the actuating assembly 304 has completely moved out of the sleeve-like structure 401, and the needle hub 103 remains stationary relative to the housing 13. As shown in FIG15c, as the sleeve-shaped structure housing 13 is continuously pulled toward the proximal end, the sleeve-shaped structure 401 drives the needle seat 103 to move toward the proximal end, and the needle seat 103 drives the actuating assembly 304 to move toward the proximal end until the second support member 302 is accommodated in the first groove 3041. The balance of forces among the first support member 301, the needle seat 103, the actuating assembly 304 and the second support member 302 on the same plane perpendicular to the axial direction is gradually broken, especially the force exerted by the second support member 302 on the portion connected to the needle seat 103. The force gradually decreases, and since the magnitude of the force applied by the needle seat 103 to the actuating assembly 304 in the direction perpendicular to the axial direction and toward the actuating assembly 304 does not change significantly, the actuating assembly 304 will use the second support member 302 as a fulcrum, and the actuating assembly 304 will tilt in the direction perpendicular to the axial direction (that is, the d direction) at the contact position between the needle seat 103 and the actuating assembly 304. Since the actuating assembly 304 has been completely moved out of the sleeve-like structure 401, the actuating assembly 304 and the needle seat 103 can be disengaged very smoothly.

[0090] Furthermore, one of the actuating assembly 304 and the needle hub 103 is provided with a raised portion 22, and the other of the actuating assembly 304 and the needle hub 103 is provided with a recessed portion 33. The raised portion 22 and the recessed portion 33 cooperate with each other to allow the actuating assembly 304 and the needle hub 103 to be detachably connected in a direction perpendicular to the axial direction, thereby ensuring that an effective connection is achieved when one of the actuating assembly 304 and the needle hub 103 drives the other to move. In other embodiments, the raised portion 22 and the recessed portion 33 may not be provided, and the connection between the actuating assembly 304 and the needle hub 103 may be ensured solely by friction between the actuating assembly 304 and the needle hub 103. It is understood that a rough surface may be provided on the contact surface of the actuating assembly 304 or / and the needle hub 103.

[0091] In another embodiment, the sleeve structure 401 further includes a second support member 302, that is, the second support member 302 is also disposed on the sleeve structure 401. In this case, the contact point between the needle hub 103 and the actuating assembly 304 needs to be located within the sleeve structure 401. After the sleeve structure 401 is released, the needle hub 103 and the actuating assembly 304 can be released. Specifically, the sleeve structure 401 is pulled proximally, driving the needle hub 103 to move proximally, thereby causing the actuating assembly 304 to move proximally for a period of time until the actuating assembly 304 cannot move proximally any further. At this point, a retaining member 3040 can be provided to abut against the actuating assembly 304. For example, the retaining member 3040 within the handle housing 10 axially abuts against the protruding portion 10220 of the first rack 1022, thereby preventing the actuating assembly 304 from moving excessively proximally. The actuating assembly 304 then releases from the sleeve structure 401, thereby disengaging the needle hub 103 and the actuating assembly 304. In this embodiment, the above-mentioned protrusion 22 and recess 33 can also be provided. At this time, the protrusion 22 or the recess 33 can be an elastic structure. When the sleeve-like structure shell 13 is pulled proximally, the sleeve-like structure 401 drives the needle seat 103 to move proximally, and the needle seat 103 drives the actuating assembly 304 to move proximally. The sleeve-like structure shell 13 is continued to be pulled proximally until the connection position of the needle seat 103 and the actuating assembly 304 is separated from the sleeve-like structure 401. Since the protrusion 22 and the recess 33 are provided, the needle seat 103 and the actuating assembly 304 are still connected at this time. Since the protrusion 22 or the recess 33 is an elastic structure, the sleeve-like structure shell 13 is further pulled proximally. The protrusion 22 and / or the recess 33 are pulled axially, and the protrusion 22 can be easily separated from the recess 33, thereby realizing the separation between the needle seat 103 and the actuating assembly 304. In other embodiments, the raised portion 22 and the recessed portion 33 may not be provided, and the connection between the actuating assembly 304 and the needle seat 103 may be ensured only by the friction between the actuating assembly 304 and the needle seat 103. It is understandable that a rough surface may be provided on the surface in contact with the actuating assembly 304 and / or the needle seat 103.

[0092] In one embodiment, referring to Figures 18a, 18b, and 18c, the suturing device 100 further includes a thread cutter 200. The thread cutter 200 is disposed on the suturing device 100 and comprises a gripping portion 201 and a cutting portion 202 connected to each other. The suture 5 is passed through the cutting portion 202, and the gripping portion 201 is pulled to bring the suture 5 into contact with the cutting portion 202, thereby shearing the suture 5. In this embodiment, the thread cutter 200 is disposed within the handle 1, with the gripping portion 201 disposed within the handle housing 10 and the cutting portion 202 disposed outside the handle housing 10. When the suture needle 3 withdraws the suture 5, any remaining suture 5 outside the body can be shortened to prevent it from becoming too long. The cutting portion 202 is provided with a strip-shaped hole 2020, the inner wall of which is provided with a blade 2023.

[0093] In one embodiment, in combination with Figures 3, 19a, 19b and 19c, the suturing device 100 also includes a wire drum 300, the suture thread 5 is wound on the wire drum 300, the wire drum 300 is rotated to release the suture thread 5, and the first control member 9 controls the fixing or loosening of the wire drum 300. The wire drum 300 has a fixed state and a loose state, and the first control member 9 has an initial state and a locked state.

[0094] Referring to Figure 19a, when the first control member 9 is in the initial state, the spool 300 is in a fixed state. Referring to Figure 19b, when the first control member 9 is in the locked state, the spool 300 is in a relaxed state. The suture 5 is wound around the spool 300, with a portion of the suture 5 wound around the spool 300 and the remaining portion extending along the sheath 2 toward the suture arm 4, such that at least one end of the suture 5 is connected to the suture arm 4. In one embodiment, after the suture 5 is folded in half, both ends of the suture are connected to the suture arm 4, with the folded portion of the suture 5 located on the spool 300. In another embodiment, one end of the suture 5 is connected to the suture arm 4, while the other end of the suture 5 is located on the spool 300.

[0095] In one embodiment, referring again to FIG19c, the wire drum 300 includes an upper bead 300a, a lower bead 300b, a winding portion 300c and a separator 300d, wherein the winding portion 300c is located between the upper bead 300a and the lower bead 300b, and the upper bead 300a and the lower bead 300b are used to limit the position of the winding of the suture thread 5, wherein the lower bead 300b can also be used to cooperate with the first control member 9 to achieve the fixing or loosening of the wire drum 300 described in the above embodiment, wherein a damping structure is also provided on the lower bead 300b, for example, the outer surface of the lower bead 300b is set to a polyhedron surface 300b1 to increase the tightness of the cooperation between the lower bead 300b and the first control member 9. In addition, the separator 300d can be used to separate the winding portion 300c and the lower bead 300b to prevent the lower bead 300b from affecting the release of the suture thread 5 on the winding portion 300c when cooperating with the first control member 9. In another embodiment, referring to FIG21, the separator 300d may not be provided.

[0096] 19c, the wire reel 300 is further provided with a wire hooking member 3001, wherein the wire hooking member 3001 can be provided at any one position or multiple positions on the upper bead 300a, the lower bead 300b, the wire winding portion 300c and the separator 300d. When the suture 5 is folded in half, both ends of the suture 5 are connected to the suture arm 4, and the folded position 501 of the suture 5 is located on the wire drum 300. At this time, in order to facilitate the winding of the folded suture 5 onto the wire drum 300, the folded position 501 of the suture 5 is first hooked on the wire hook 3001, and then the folded position 501 of the suture 5 hooked on the wire hook 3001 is used as the starting point, and the folded suture 5 is wound around the wire drum 300 to complete the winding of the suture 5. Then, the other part of the suture 5 is passed through the threading hole 502 on the handle shell 10 (see Figure 20), and then extended along the sheath 20 to the suture arm 4 and connected to the suture arm 4. In this embodiment, the thread hooking member 3001 is a small protrusion 3001a. Specifically, a small protrusion 3001a is cut out on the upper protrusion 300a, and the small protrusion 3001a is spaced apart from other parts of the upper protrusion 300a. In other embodiments, the thread hooking member 3001 can be a hook-shaped structure, a rod-shaped structure, etc. on the wire drum 300 or installed separately on the wire drum 300, as long as it can hook the folded position 501 of the suture thread 5.

[0097] In this embodiment, the first control member 9 can also be used to control the transition between the conveying state and the deployed state of the suturing arm 4. For the specific control process, please refer to the aforementioned embodiment. When the first control member 9 is in the initial state, the suturing arm 4 is in the conveying state and the wire drum 300 is in the fixed state; when the first control member 9 is in the locked state, the suturing arm 4 is in the deployed state and the wire drum 300 is in the relaxed state. In other embodiments, the first control member 9 can be used only to control the fixation and relaxation of the wire drum 300, and the suturing arm 4 can be controlled by another component, or the suturing arm 4 can be covered with a protective structure on the outside, and the suturing arm 4 is always in the deployed state. There is no need to control the state of the suturing arm 4, and the protective structure can be removed when the target position is reached.

[0098] In this embodiment, a first control member 9 having an initial state and a locked state is provided to control the transition between the fixed state and the relaxed state of the spool 300, thereby preventing the spool 300 from being in the relaxed state all the time and releasing too much suture thread 5. Excessive suture thread 5 is prone to accumulation and knotting, and is likely to interfere with other operations of the suturing device 100. The spool 300 can be relaxed when needed, which enhances operability and controllability.

[0099] In one embodiment, referring to Figures 19a and 19b, the first control member 9 includes a main body 92, which includes a first main body 921 and a second main body 922. The first main body 921 and the second main body 922 are arranged opposite each other, and the cable drum 300 is disposed between the first main body 921 and the second main body 922. The first main body 921 has a first main body inner wall 9210 on the side proximate to the cable drum 300, and the second main body 922 has a second main body inner wall 9220 on the side proximate to the cable drum 300. The cable drum 300 is disposed between the first main body 921 and the second main body 922 at a first position P. At the first position P, the distance between the first main body inner wall 9210 and the second main body inner wall 9220 when the first control member 9 is in an initial state is smaller than the distance between the first main body inner wall 9210 and the second main body inner wall 9220 when the first control member 9 is in a locked state, thereby achieving radial fixation and release of the cable drum 300. When the distance between the inner wall 9210 of the first main body and the inner wall 9220 of the second main body is small, it can be used to clamp the wire drum 300, and the wire drum 300 remains in a fixed state; when the distance between the inner wall 9210 of the first main body and the inner wall 9220 of the second main body is large, it can be used to loosen the wire drum 300, and the wire drum 300 remains in a relaxed state.

[0100] In this embodiment, recesses 9211 are provided in portions of the first main body inner wall 9210, thereby increasing the distance between the first main body inner wall 9210 and the second main body inner wall 9220. When the first control member 9 is in its initial state, at the first position P, the portion of the first main body inner wall 9210 not provided with the recesses 9211 abuts against the cable drum 300. When the first control member 9 is in its locked state, at the first position P, the portion of the first main body inner wall 9210 provided with the recesses 9211 abuts against the cable drum 300. In other embodiments, the second main body inner wall 9220 may also be provided with recesses, or only the second main body inner wall 9220 may be provided with recesses. In other embodiments, the overall thickness of the first main body 921 / the second main body 922 is uniform, and no recess is provided. It is sufficient that when the first control member 9 is in the initial state at the first position P, the distance between the first main body 921 and the second main body 922 is reduced, and when the first control member 9 is in the locked state, the distance between the first main body 921 and the second main body 922 is increased.

[0101] In this embodiment, operating the first operating portion 91 causes the interconnected first and second main members 921, 922 to rotate. In other embodiments, by providing a different operating portion, one of the first and second main members 921, 922 can be rotated, thereby fixing or releasing the cable drum 300 by changing the distance between the side walls of the two main members. In other embodiments, the operating portion may not be provided, and the first and / or second main members 921, 922 can be rotated directly.

[0102] 3 , 19 , and 20 , in one embodiment, the cable drum 300 can be disposed outside the handle housing 10, and the main body 92 can be disposed inside the handle housing 10. At a first position P, the handle housing 10 is provided with an opening 1011, through which the first main body inner wall 9210 can abut against the cable drum 300. It will be appreciated that, at the first position P, the handle housing 10 can further include another opening 1011, through which the second main body inner wall 9220 can abut against the cable drum 300. Referring to FIG. 21 , 22 , and 23 , in one embodiment, the suturing device 100 further includes a fixed cover 330 that covers the exterior of the cable drum 300. Referring to Figures 23a and 23b, when the first control member 9 is in its initial state, it presses against one end of the cable drum 300, while the other end of the cable drum 300 is secured to the fixed cover 330. Referring to Figures 23c and 23d, when the first control member 9 is in its locked state, the other end of the cable drum 300 is released from the fixed cover 300. This arrangement allows the cable drum 300 to be secured and released in the height direction. In this embodiment, the fixed cover 330 is fixedly connected to the handle housing 10, maintaining the fixed cover 330 in place.

[0103] In this embodiment, the first control member 9 includes an ejector 910 having an ejection portion 910a at one end. The first control member 9 is rotatable. When the first control member 9 is in an initial state, the ejection portion 910a is positioned close to one end of the cable drum 300 and presses against the cable drum 300, thereby securing the cable drum 300. When the first control member 9 is rotated to a locked state, the ejection portion 910a moves away from one end of the cable drum 300, thereby releasing the cable drum 300.

[0104] Furthermore, the suturing device 100 further includes an elastic member 311, the two ends of which are respectively connected to the fixed cover 330 and the thread drum 300. When the first control member 9 is in the initial state, the ejection portion 910a is close to one end of the thread drum 300 and presses against the thread drum 300, thereby fixing the thread drum 300. At this time, the elastic member 311 is compressed, storing elastic potential energy; when the first control member 9 is rotated to the locked state, the ejection portion 910a is away from one end of the thread drum 300, and the compressed elastic member 311 releases elastic potential energy, which acts on the thread drum 300, accelerating the separation of the thread drum 300 from the fixed cover 330, thereby accelerating the release of the thread drum 300.

[0105] Furthermore, a first fixing portion 111 is provided at the other end of the cable drum 300, and a second fixing portion 112 is provided at the fixing cover body 330. One of the first fixing portion 111 and the second fixing portion 112 is a groove, and the other is a protrusion, which is connected to the groove, thereby improving the fixing performance of the cable drum 300 and the fixing cover body 330.

[0106] In one embodiment, the aforementioned method can be used to simultaneously secure and release the cable drum 300 in both the radial direction and the height direction of the cable drum 300. Specifically, this can be achieved, but is not limited to, by disposing the ejector 910 on the main body 92. In other embodiments, either the radial direction or the height direction of the cable drum 300 can be used to secure and release the cable drum 300.

[0107] 21 , the wire drum 300 is at least partially disposed outside the handle housing 10 . The handle housing 10 is provided with a first column 312 . The wire drum 300 is inserted into the first column 312 . The wire drum 300 rotates around the first column 312 to release the suture 5 .

[0108] 21 and 24 , an opening 313 is provided at one end of the cable drum 300 near the handle housing 10. A first damping structure 314 is provided on the inner wall of the cable drum 300. Specifically, the first damping structure 314 is provided on the inner wall surrounding the opening 313. The handle housing 10 is provided with a second damping structure 315 that cooperates with the first damping structure 314. As the cable drum 300 rotates, the first damping structure 314 moves relative to the second damping structure 315, slowing down the rotation of the cable drum 300. In other embodiments, the outer wall of the cable drum 300 near the handle housing 10 is provided with a first damping structure 314, and the handle housing 10 is provided with a second damping structure 315 that cooperates with the first damping structure 314.

[0109] During operation, when the distal end of the suturing needle 3 is connected to the suturing arm 4, at least one end of the suture thread 5 on the suturing arm 4 is withdrawn, and then the suturing needle 3 is displaced, the suture thread 5 is displaced, and the suture thread 5 drives the spool 300 to rotate, thereby releasing the suture thread 5 wound on the spool 300. Due to the inertia of the rotation of the spool 300, the spool 300 is likely to rotate too fast, resulting in excessive release of the suture thread 5 wound on the spool. Excessive release of the suture thread is likely to accumulate and knot, and is likely to interfere with other operations of the suturing device 100. Therefore, it is necessary to slow down the rotation speed of the spool 300 so that a reasonable amount of suture thread 5 can be released.

[0110] Referring to Figures 25a, 26 and 27, in one embodiment, the handle 1 also includes a receiving structure 122, which is fixedly connected to the sheath 2. The receiving structure 122 includes a first part 1221, which is against the handle housing 10. The first part 1221 is provided with a first matching structure 1222, and the handle housing 10 is provided with a second matching structure 1223. One of the first matching structure 1222 and the second matching structure 1223 is at least one protrusion structure 1221a, and the other of the first matching structure 1222 and the second matching structure 1223 is a plurality of recessed structures 1221b. The plurality of recessed structures 1221b are arranged along the circumferential direction. When the receiving structure 122 is rotated, the receiving structure 122 moves circumferentially relative to the handle housing 10, so that a protrusion structure 1221a moves in sequence in the plurality of recessed structures 1221b.

[0111] 27 , this embodiment provides a receiving structure 122, which is connected to the sheath tube 2. By rotating the receiving structure 122, the receiving structure 122 moves circumferentially relative to the handle shell 10. After the sheath tube is delivered into the body, the circumferential relative position of the receiving structure 122 and the handle shell 10 can be adjusted to realize the rotation of the sheath tube 2 and adjust the circumferential position of the sheath tube 2, thereby more flexibly adapting to the environment inside the body. At the same time, the other parts of the handle 1 can be kept stationary, thereby facilitating the operation of other parts of the handle 1. In addition, by respectively providing a first mating structure 1222 and a second mating structure 1223 on the first portion 1221 of the receiving structure 122 and the handle housing 10, one of the first mating structure 1222 and the second mating structure 1223 is at least one protrusion structure 1221a, and the other of the first mating structure 1222 and the second mating structure 1223 is a plurality of recessed structures 1221b, the plurality of recessed structures 1221b being arranged circumferentially, and the receiving structure 122 is rotated, and the receiving structure 122 moves circumferentially relative to the handle housing 10, causing the protrusion structure 1221a to move sequentially in the plurality of recessed structures 1221b, thereby enabling quantitative control of the circumferential rotation angle of the receiving structure 122 during the rotation process, so as to more accurately control the circumferential rotation angle of the sheath tube 2, thereby improving the accuracy of the surgical operation process and the success rate of the surgery. In this embodiment, the distal end of the sheath tube 2 has a curved portion, or does not have a curved portion. In FIG27 , the first matching structure 1222 is a recessed structure 1221 b and the second matching structure 1223 is a protrusion structure 1221 a . Referring to FIG28 , in another embodiment, the first matching structure 1222 is a protrusion structure 1221 a and, understandably, the second matching structure 1223 is a recessed structure 1221 b .

[0112] In one embodiment, the recessed structure 1221b includes a first recessed portion 1221b1 and a second recessed portion 1221b2 connected to each other. The protruding block structure 1221a moves from the first recessed portion 1221b1 to the second recessed portion 1221b2 or vice versa, driving the sheath 2 to rotate clockwise or counterclockwise relative to the handle housing 10 by a first angle e. In this embodiment, the clockwise or counterclockwise rotation allows for more precise adjustment of the rotation angle of the sheath 2, facilitating reversible adjustment or correction to an appropriate angle during surgery if the sheath 2 rotates too far in one direction.

[0113] In one embodiment, the receiving structure 122 further includes a second portion 1224, which is fixedly connected to the sheath tube 2. The first portion 1221 is disposed on the outer surface of the second portion 1224, thereby facilitating the connection between the receiving structure 122 and the sheath tube 2 and not affecting the mating between the receiving structure 122 and the handle housing 10. Specifically, the second portion 1224 is at least partially disposed within the handle housing 10, the proximal end of the first portion 1221 abuts against the distal end of the handle housing 10, the proximal end of the first portion 1221 is provided with a first mating structure 1222, and the distal end of the handle housing 10 is provided with a second mating structure 1223. In other embodiments, the receiving structure 122 may not include the second portion 1224 and may include only the first portion 1221, wherein one end of the first portion 1221 may be connected to the sheath tube 2 and the other end of the first portion 1221 is mated with the handle housing 10.

[0114] 25a and 25b, in one embodiment, the handle 1 further includes a knob 123, which is sleeved and fixed on the receiving structure 122, so that the receiving structure 122 can be rotated by the knob 123. In other embodiments, the knob 123 may not be included, and the receiving structure 122 may be rotated directly.

[0115] The knob 123 is provided with a knob stopper 1231, and the handle housing 10 is provided with a housing stopper 1232. The knob 123 is sleeved on the receiving structure 122. When the knob 123 is rotated in the first direction Q, the knob stopper 1231 and the housing stopper 1232 circumferentially stop each other, preventing the knob 123 from further rotating in the first direction Q. The first direction Q can be clockwise or counterclockwise.

[0116] The knob stopper 1231 includes a first knob stopper 1231a and a second knob stopper 1231b, and the housing stopper 1232 moves between the first knob stopper 1231a and the second knob stopper 1231b; alternatively, the housing stopper 1232 includes a first housing stopper 1232a and a second housing stopper 1232b, and the knob stopper 1231 moves between the first housing stopper 1232a and the second housing stopper 1232b. This arrangement can control the circumferential rotation between the knob stopper 1231 and the housing stopper 1232 within a certain range within the entire circumference, preventing the knob stopper 1231 from rotating a full circle relative to the housing stopper 1232. In other words, the knob 123 rotates within a certain range relative to the handle housing 10, thereby controlling the circumferential rotation angle of the sheath tube 2.

[0117] In another embodiment, the knob 123 has an initial state. The knob 123 is provided with a first positioning member 1233, and the receiving structure 122 is provided with a second positioning member 1234. When the knob 123 and the receiving structure 122 are connected to each other, the first positioning member 1233 and the second positioning member 1234 are connected and fixed to each other, so that the knob 123 is in the initial state when it is mated with the handle housing 10. During installation, the receiving structure 122 can be connected to the handle housing 10, and then the knob 123 is connected to the receiving structure 122 through the mating of the first positioning member 1233 and the second positioning member 1234. Therefore, by controlling the initial connection position of the knob 123 and the receiving structure 122, the initial connection position of the knob stopper and the handle housing 10 can be controlled, thereby controlling the circumferential distance between the knob stopper 1231 and the housing stopper 1232, thereby controlling the angular range of the knob 123 rotation, and further precisely controlling the angular range of the circumferential rotation of the sheath tube 2. In other embodiments, the first knob stop 1231a, the second knob stop 1231b, the first positioning member 1233 and the second positioning member 1234 can be set at the same time, or the first shell stop 1232a, the second shell stop 1232b, the first positioning member 1233 and the second positioning member 1234 can be set at the same time, so as to more accurately control the angle range of the circumferential rotation of the sheath 2.

[0118] In another embodiment, it can be understood that the stopper can also be provided on the supporting structure 122. Specifically, it can be understood that the supporting structure 122 can be provided with a supporting structure stopper, and the handle housing 10 can be provided with a housing stopper 1232. When the knob 123 is rotated in the first direction, the supporting structure stopper and the housing stopper 1232 stop each other circumferentially to prevent the supporting structure from continuing to rotate in the first direction.

[0119] Referring to FIG27 , to better secure the receiving structure 122 and the handle housing 10, fixing elements 1225 and 1226 are provided on the receiving structure 122 and the handle housing 10, respectively. The fixing element 1225 of the receiving structure 122 is a groove structure, while the fixing element 1226 of the handle housing 10 is a bump structure, with the groove and bump structures interfitting with each other. Referring to FIG28 , in one embodiment, the fixing element 1225 of the receiving structure 122 is a bump structure, while the fixing element 1226 of the handle housing 10 is a groove structure, with the groove and bump structures interfitting with each other.

[0120] In this embodiment, in the embodiment with the receiving structure 122, the receiving structure 122 can be applied to the suturing device 100. It can be understood that it can also be applied to any conveying device. Referring to Figure 1, the conveying device 1000 includes a handle 1 and a sheath 2 connected to each other.

[0121] Take the example of using the suturing device 100 in this embodiment to sew up a patent foramen ovale, wherein there are two suturing needles 3, namely a first suturing needle 31 and a second suturing needle 32, referring to FIG29a, the two ends 5a and 5b of the suture 5 are respectively located on both sides of the suturing arm 4, and the middle part 5c of the suture 5 extends proximally along the sheath 2 until it can be wound around the reel 300. The general operation process may be: the suturing device 100 is delivered to the target position along the guide wire, the distal end of the suturing device 100 passes through the foramen ovale, and then the suturing arm 4 is unfolded, and the two sides of the suturing arm 4 are respectively against the primary septum 600 and the secondary septum 700 at the position of the foramen ovale, and then referring to FIG29b, the first suturing needle 31 is extended to pass through the primary septum 600 and connect to one side of the suturing arm 4, thereby pulling out one end 5a of the suture 5 from the suturing arm 4, and the second suturing needle 32 is extended to pass through the secondary septum 700 and connect to the other side of the suturing arm 4, thereby The other end 5b of the suture 5 is pulled out from the arm 4, and the first suture needle 31 and the second suture needle 32 respectively carry the two ends 5a and 5b of the suture 5 and slowly withdraw to the proximal end into the sheath tube 2 until they are withdrawn outside the body. At the same time, the middle part 5c of the suture 5 is slowly released from the coil 300, and then slowly moved to the distal end until it reaches the primary septum and the secondary septum position (see Figure 29c). Finally, the knotter is sent into the body along the two ends 5a and 5b of the suture 5, and the excess part of the suture 5 is sheared to complete the suture of the patent foramen ovale. In order to make the figure simpler and easier to understand, the first suture needle 31, the second suture needle 32, the suture arm 4, the sheath tube 2 and the coil 300 are not drawn in Figures 29a, 29b and 29c. Please refer to the aforementioned embodiment for the relevant structure.

[0122] The foregoing description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed in the present invention are intended to be encompassed within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A suturing device, comprising a suture needle, a suture arm and a suture thread, at least one end of the suture thread being located on the suture arm, and the distal end of the suture needle being connectable to the suture arm to withdraw at least one end of the suture thread from the suture arm, characterized in that, The suture device further includes an actuating assembly, a needle holder, a first support member, and a second support member. The first support member is movably connected to the needle holder. The needle holder is connected to the suture needle. The actuating assembly and the needle holder are detachably connected in a direction perpendicular to the axial direction. The actuating assembly controls the extension and retraction of the suture needle through the needle holder. When the suture needle extends, the distal end of the suture needle can be connected to the suture arm. After the actuating assembly and the needle holder are connected, the first support member is located outside the needle holder, and the second support member is located outside the actuating assembly. The straight line in the axial direction where the first support member is located and the straight line in the axial direction where the second support member is located are oppositely arranged in a direction perpendicular to the axial direction, for supporting the actuating assembly and the needle holder in a direction perpendicular to the axial direction. The connected actuating assembly and needle holder can axially move between the first support member and the second support member. When the first support member moves proximally, the first support member drives the needle holder to move proximally, and the needle holder drives the actuating assembly to move proximally until the actuating assembly and the needle holder are disengaged.

2. The suture device according to claim 1, characterized in that, The suture device further includes a sleeve structure. The sleeve structure includes the first support member. The sleeve structure is movably connected to the needle holder. The proximal end of the needle holder is disposed within the sleeve structure, and the distal end of the needle holder can extend or retract into the sleeve structure.

3. The suture device according to claim 2, wherein, One of the sleeve structure and the needle holder is provided with a through-hole structure, and the other of the sleeve structure and the needle holder is provided with a fixing structure, and the fixing structure is restricted to move within the through-hole structure.

4. The suture device according to claim 2, wherein The suture device further includes a handle. The handle includes a detachable handle housing and a sleeve structure housing. The actuating device moves within the handle housing. The sleeve structure housing is connected to the sleeve structure, and the sleeve structure housing is disposed outside the sleeve structure.

5. The suture device according to claim 4, wherein, A connecting member is provided on the sleeve structure housing. The connecting member is inserted into the handle housing to fixedly connect the handle housing and the sleeve structure housing. A slit is provided at the position of the connecting member in the sleeve structure housing, and the slit enables the position of the connecting member in the sleeve structure housing to be relatively movable with respect to other positions in the sleeve structure housing.

6. The suture device according to claim 2, characterized in that, The suture device further includes a handle. The handle includes a handle housing, and the second support member is disposed on the inner wall of the handle housing.

7. The suture device according to claim 6, wherein A first groove is provided on the actuating assembly. The second support member can be received within the first groove. When the first support member moves proximally, the first support member drives the needle holder to move proximally, and the needle holder drives the actuating assembly to move proximally until the second support member is received within the first groove, causing the actuating assembly and the needle holder to be disengaged.

8. The suture device according to claim 2, characterized in that, The sleeve structure further includes the second support member.

9. The suture device according to claim 1, wherein One of the actuating assembly and the needle holder is provided with a protrusion, and the other of the actuating assembly and the needle holder is provided with a recess. The protrusion and the recess cooperate with each other to detachably connect the actuating assembly and the needle holder in a direction perpendicular to the axial direction.

10. The suture device according to claim 1, characterized in that, The suturing device further includes a thread cutter. The thread cutter is disposed on the suturing device. The thread cutter includes a holding portion and a cutting portion connected to each other. The suture passes through the cutting portion. By pulling the holding portion, the suture is brought into contact with the cutting portion, and the suture can be cut.

11. The suturing device according to claim 1, wherein At least one end of the suture is located on the suture arm. The suture arm has a conveying state and a deployed state that can be converted into each other. When in the deployed state, the distal end of the suture needle can be connected to the suture arm to extract at least one end of the suture from the suture arm. The suturing device further includes a first connecting member, a second connecting member, a slider assembly, and a first control member. The slider assembly includes a first slider, a second slider, and an elastic member connected to each other. The second slider and the elastic member are axially disposed within the first slider. The second slider is movable relative to the first slider. Two ends of the first connecting member are respectively connected to the first slider and the first control member. Two ends of the second connecting member are respectively connected to the suture arm and the second slider. Wherein, the first control member has an initial state and a locked state. During the process of the first control member moving from the initial state to the locked state, the first control member drives the first slider to axially move in a first direction through the first connecting member, forming a first movement stroke. The first slider drives the second slider to axially move in the first direction through the elastic member, forming a second movement stroke. The first movement stroke is greater than the second movement stroke, so that the elastic member undergoes elastic deformation within the first slider, and the suture arm can be gradually converted from the conveying state to the deployed state. When the first control member is in the locked state, the first control member maintains the elastic deformation of the elastic member through the first connecting member and the first slider, so that the second slider is fixed, and the suture arm is locked in the deployed state.

12. The suturing device according to claim 1, characterized in that, The suturing device includes a handle and a sheath tube connected to each other. The handle includes a handle housing. The handle further includes a receiving structure. The receiving structure is fixedly connected to the sheath tube. The receiving structure includes a first part. The first part abuts against the handle housing. The first part is provided with a first mating structure. The handle housing is provided with a second mating structure. One of the first mating structure and the second mating structure is at least one convex block structure, and the other of the first mating structure and the second mating structure is a plurality of concave structures. The plurality of concave structures are arranged circumferentially. By rotating the receiving structure, the receiving structure can move circumferentially relative to the handle housing, so that one convex block structure moves sequentially among the plurality of concave structures.

13. The suture device according to claim 1, characterized in that, The suture device further includes a first control member and a thread spool. A part of the suture is wound around the thread spool, and another part of the suture extends towards the suture arm, so that at least one end of the suture is connected to the suture arm. The first control member can control the fixation or relaxation of the thread spool. The thread spool has a fixed state and a relaxed state. The first control member has an initial state and a locked state. When the first control member is in the initial state, the thread spool is in the fixed state. When the first control member is in the locked state, the thread spool is in the relaxed state. The thread spool in the relaxed state can release the suture.

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