CN120227084A - Suture locking system - Google Patents

Abstract

The present invention discloses a suture locking system, which includes a sheath, a plug head assembly disposed at the distal end of the sheath, a support sleeve disposed in the sheath, and a push rod movably disposed in the support sleeve. The plug head assembly is used to lock the suture, the distal end of the support sleeve is connected to the plug head assembly, or the distal end of the support sleeve is connected to the inner wall of the sheath near the distal end or the distal end of the sheath, and the proximal end of the support sleeve is fixed; during the movement of the push rod toward the distal end, the distal end of the push rod can push the plug head assembly to push at least part of the plug head assembly out of the sheath. In the suture locking system, the support sleeve can provide a pulling force toward the proximal end to offset at least part of the pushing force of the push rod toward the distal end, and help the sheath share at least part of the pushing force of the push rod toward the distal end, thereby reducing the probability of the sheath being elongated and deformed.

Description

Suture knot system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a suture locking system.

Background

Generally, in a surgical operation, a suture is required to be knotted and fixed, and the surgical operation is generally performed under the direct vision condition of a doctor, so that the doctor usually knots manually. However, the minimally invasive surgery and interventional surgery are widely used at present, taking the advantage of small trauma and quick recovery as an example, taking the catheter interventional surgery as an example, instruments such as a catheter are required to be stretched into a patient to reach a preset position and suture treatment is performed, after the suturing operation is completed, the knotting instruments are required to be used for capturing the suture and stretching into the suturing position, the knotting of the suture in the patient is completed by utilizing the external remote operation of the knotting instruments, the knotted suture is cut off, and the cut suture is withdrawn from the patient along with the knotting instruments, so that the surgery is completed.

In the prior art, the ejector rod in the outer sheath tube is pushed to move to one side of the far end to squeeze the chuck component arranged at the far end of the outer sheath tube, so that the chuck component is deformed to clamp and lock the suture thread penetrating through the chuck component, and therefore, the ejector rod is required to apply larger pushing force for deforming the chuck component. When the ejector rod applies a large pushing force, the outer sheath tube is easily elongated and deformed, and the problem that the plug head is difficult to fall off from the outer sheath tube is caused.

Disclosure of Invention

The invention aims to solve the technical problem that pushing force applied to a chuck assembly by a push rod is easy to cause the outer sheath tube to be elongated and deformed, and provides a suture locking system aiming at the defects in the prior art.

The invention solves the technical problems by the following technical proposal:

The suture locking system comprises a sheath tube, a bolt head assembly arranged at the distal end of the sheath tube, a support sleeve arranged in the sheath tube and a push rod movably arranged in the support sleeve, wherein the bolt head assembly is used for locking a suture, the distal end of the support sleeve is connected with the bolt head assembly, or the distal end of the support sleeve is connected with the inner wall of the sheath tube close to the distal end or the distal end of the sheath tube, the proximal end of the support sleeve is fixed, and in the process of moving the push rod towards the distal end, the distal end of the push rod can push the bolt head assembly to push at least part of the bolt head assembly out of the sheath tube.

According to the suture locking system, the supporting sleeve is additionally arranged in the sheath tube, one end of the supporting sleeve is connected with the bolt head assembly, or the distal end of the supporting sleeve is connected with the inner wall of the sheath tube close to the distal end or the distal end of the sheath tube, and the other end of the supporting sleeve is fixed, so that when the ejector rod moves to the distal end and pushes the bolt head assembly, the supporting sleeve can provide a pulling force towards the proximal end to at least offset the pushing force of part of the ejector rod towards the distal end, therefore, the supporting sleeve can at least help the sheath tube to share the pushing force of part of the ejector rod towards the distal end, the probability that the sheath tube is stretched and deformed is reduced, and part of elements (such as the locking piece) of the bolt head assembly cannot fall off from the sheath tube due to the stretching and deformation of the sheath tube when the sheath tube is required to fall off, and the locking success rate is improved.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic illustration of an exemplary suture locking system of the present invention;

FIG. 2 is an exploded view of an exemplary suture locking system of the present invention;

FIG. 3 is a partial cross-sectional view of an exemplary suture locking system of the present invention;

FIG. 4 is a partial cross-sectional view of a plug assembly and sheath, support sleeve, blade tube and push rod of an exemplary suture locking system of the present invention;

FIG. 5 is a cross-sectional view of a boss and head of an exemplary suture locking system of the present invention;

FIG. 6 is a schematic diagram of an assembled configuration of a drive mechanism of an exemplary suture locking system of the present invention;

FIG. 7 is an exploded schematic view of a drive mechanism of an exemplary suture locking system of the present invention;

FIG. 8 is a schematic illustration of an exemplary suture locking system of the present invention;

FIG. 9 is an enlarged schematic view of a portion A of FIG. 8;

FIG. 10 is a schematic illustration of a support sleeve and tube clamp in an exemplary suture locking system of the present invention;

FIG. 11 is a schematic view of the knife tube configuration of an exemplary suture locking system of the present invention;

FIG. 12 is a partial cross-sectional view of a plug assembly and sheath, support sleeve, blade tube and push rod of an exemplary suture locking system of the present invention;

FIG. 13 is a cross-sectional view of a boss and head of an exemplary suture locking system of the present invention;

FIG. 14 is a schematic view of an exemplary suture locking system of the present invention after completion of locking of the suture and after cutting of the head, pin and suture.

The various references in the drawings are as follows:

100. A suture locking system;

10. Handle, 11, upper shell, 12, lower shell, 13, end cover, 14, stress-relieving sleeve, 141, fixing part, 142, tubular part, 101, holding cavity, 102, first sliding structure, 103, first fixing groove, 104, end cover mounting part, 105, second fixing groove, 106, supporting part, 1061, slot;

20. 21, a second wire passing hole;

30. Bolt head assembly, 31, bolt seat, 311, first step section, 312, second step section, 313, third step section, 314, step surface, 315, seat hole, 3151, first step section, 3152, second step section, 3153, clamping groove, 3154, annular groove, 316, cutting part, 317, stop groove, 32, bolt head, 321, pin hole, 322, annular bulge, 323, stop part, 33, bolt pin, 331, main body part, 332, limit part, 333, bulge part, 301, threading channel, 34, locking piece;

40. 41 parts of blade tube, 42 parts of main body, 421 parts of cutting section, 401 parts of blade part and first clamping groove;

50. A push rod;

60. Driving mechanism, 61, screw-in piece, 611, sliding connection part, 6111, chute, 6112, first pin hole, 612, screw-fit part, 613, connecting rod part, 6131, rotation limit part, 6132, limit clearance, 614, through hole, 62, fixing piece, 621, screw hole, 63, moving piece, 631, rotation connection part, 6311, rotation limit hole, 6312, second pin hole, 632, fixed connection part, 6321, first fastening hole, 6322, second fastening hole, 633, first side wall, 634, second side wall, 6301, second sliding structure, 6302, avoidance groove, 64, knob, 641, sliding block;

70. A support sleeve; 71, a first wire through hole 72, a second clamping groove;

80. A connection sleeve;

90. 91, a lead handle, 92, a lead wire, 911 and a cantilever part;

1001. the device comprises a first pin shaft, 1002, a second pin shaft, 1003, a pipe clamp, 10031, a third clamping groove, 1004 and a fastening screw;

200. suture line.

Detailed Description

For a clearer understanding of technical features, objects, and effects of the present invention, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass 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 turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

It should be noted that "distal end" and "proximal end" are used as terms of orientation, which are terms commonly used in the field of interventional medical devices, where "distal end" refers to an end that is away from an operator during a surgical procedure and "proximal end" refers to an end that is near the operator during a surgical procedure. Axial refers to the direction parallel to the line connecting the distal center and the proximal center of the medical instrument, and radial refers to the direction perpendicular to the axial direction.

Referring to fig. 1,2, 4, 5 and 6, the present embodiment provides a suture locking system 100, which includes a sheath 20, a plug assembly 30, a handle 10, a blade tube 40, a push rod 50 and a driving mechanism 60. The plug assembly 30 is disposed on the distal side of the sheath 20. The plug assembly 30 has a threading channel 301 in communication with the sheath 20. Suture 200 may extend into sheath 20 through threading channel 301. The proximal end of the sheath 20 is connected to the handle 10. The ejector 50 is disposed in the sheath 20, and the ejector 50 is movable relative to the sheath 20 in the axial direction of the sheath 20. The drive mechanism 60 is movably disposed on the handle 10. The proximal end of the ram 50 is coupled to a drive mechanism 60, which drive mechanism 60 is capable of driving the ram 50 in an axial movement of the sheath 20 during actuation. When the push rod 50 moves distally along the axial direction of the sheath 20, the distal end of the push rod 50 may compress the plug assembly 30, and the plug assembly 30 may be converted from an initial state to a locked state under the compression of the push rod 50, thereby locking a suture thread inserted into the plug assembly 30. In other embodiments, suture locking system 100 may not include handle 10, so long as drive mechanism 60 is capable of controlling blade tube 40 and ejector 50.

It should be noted that, as shown in fig. 4 and 5, the initial state of the plug assembly 30 refers to a state in which the threading channel 301 is clear, and the suture 200 may freely enter and exit the threading channel 301, or the suture 200 may freely move in the threading channel 301. As shown in fig. 5 and 14, the locked state of the head assembly 30 refers to a state in which the threading channel 301 is closed and the suture is locked, and at this time, the suture 200 is fixedly connected to at least part of the devices in the head assembly 30. It will be appreciated that the bolt head assembly 30 may be provided in a variety of configurations for effecting a transition from an initial state to a locked state. For example, in some embodiments, the plug assembly 30 may be deformed entirely by the compression of the distal end of the push rod 50, bending the threading channel 301, and radially deforming the inner wall of the threading channel 301 and clamping the suture 200 in place. Or in other embodiments, by cooperation between different devices in the plug assembly 30, portions of the devices in the plug assembly 30 are displaced and blocked off the threading channel 301 under the compression of the ram 50 to clamp and secure the suture 200 within the threading channel 301. Alternatively, in another embodiment, the locking state can be achieved without the need for the ram 50 or other elements to squeeze the plug assembly 30, and the plug assembly 30 can be always in an automatic locking state, for example, a channel capable of being automatically locked is provided inside the plug assembly 30, the inner diameter of the channel is smaller than the outer diameter of the suture, the inside of the plug assembly 30 is made of an elastic material, the suture 200 penetrates into the channel, the suture 200 and the plug assembly 30 can be mutually fixed under the action of no external force, and then the ram 50 pushes the plug assembly 30, so that at least part of the plug assembly 30 is pushed out of the sheath 20. Alternatively, in another embodiment, the ejector 50 may not be provided, the plug assembly 30 may be in a locked state all the time, for example, an automatically lockable channel is provided in the plug assembly 30, the inside diameter of the channel is smaller than the outside diameter of the suture, the inside of the plug assembly 30 is made of an elastic material, the suture 200 penetrates the channel, the suture 200 and the plug assembly 30 can be mutually fixed under the action of no external force, the sheath 20 is retracted, and the plug assembly 30 can be detached from the sheath 20.

Further, as shown in fig. 4, the plug assembly 30 further includes a cutting portion 316 located inside the sheath 20, the blade tube 40 is sleeved outside the ejector 50 and located inside the sheath 20, the blade tube 40 can move relative to the sheath 20 along the axial direction of the sheath 20, a blade 421 is disposed at the distal end of the blade tube 40, the blade 421 is disposed opposite to the cutting portion 316, and the blade 421 is in contact fit with the cutting portion 316. Specifically, the contact fit means that the blade 421 and the cutting part 316 can be switched between a separated and a contacted state during the movement of the blade tube 40 in the axial direction of the sheath tube 20, and the blade 421 and the cutting part 316 are separated and separated when the blade tube 40 moves in the axial direction toward the proximal side, and the blade 421 and the cutting part 316 come close to and come into contact with each other when the blade tube 40 moves in the axial direction toward the distal side.

In detail, referring to fig. 4, 5 and 12, the suture 200 may extend into the sheath 20 through the threading channel 301 and between the cutting portion 316 and the blade 421, and the blade 421 may contact the cutting portion 316 and clamp the suture 200 between the blade 421 and the cutting portion 316 during the movement of the blade 40 relative to the sheath 20 along the axial distal end of the sheath 20.

In this embodiment, as shown in fig. 6, 8 and 12, the proximal end of the blade tube 40 is connected to the driving mechanism 60, and during the movement of the driving mechanism 60 relative to the handle 10, the driving mechanism 60 can at least drive the blade tube 40 to rotate around its own axis, so that the blade 421 contacts the cutting portion 316 and clamps the suture thread 200 between the cutting portion 316 and the blade 421, and the driving mechanism 60 drives the blade tube 40 to rotate around its own axis, so that the blade 421 rotates relative to the cutting portion 316, so that the blade 421 can cut the suture thread 200 in a manner of rotating relative to the cutting portion 316, and the blade 421 can apply pressure and cutting force to the suture thread 200 at the same time, thereby improving the cutting effect of the blade 421 on the suture thread 200 and reducing the difficulty in cutting the suture thread 200. In addition, compared with the mode of pressing and breaking the parting line only, the method of the invention provides that the pressure required by the parting line is smaller by rotating the blade 421 relative to the cutting part 316 to cut the suture 200, so that the pushing force applied by the blade tube 40 to the Yu Shuan head assembly 30 and the pressure between the blade 421 and the cutting part 316 can be reduced, and the probability of damage to the blade tube 40 or the sheath 20 can be reduced.

In some embodiments, as shown in fig. 4, 8 and 9, the suture locking system 100 further includes a support sleeve 70, wherein the support sleeve 70 is sleeved outside the push rod 50, and the support sleeve 70 is disposed in the sheath 20, specifically, the support sleeve 70 is disposed in the blade tube 40, the distal end of the support sleeve 70 is connected to the bolt head assembly 30, and the proximal end of the support sleeve 70 is connected to the handle 10 for fixing, by adding the support sleeve 70 in the sheath 20, when the push rod 50 moves distally and presses the bolt head assembly 30, the support sleeve 70 can provide a pulling force to the bolt head assembly 30 towards the proximal end so as to at least offset a pushing force to the push rod 50 towards the distal end, so that the support sleeve 70 can at least help the sheath 20 share a pushing force to the push rod 50 towards the distal end, thereby reducing the probability of the sheath 20 being pulled and deformed, preventing a part of the elements of the bolt head assembly 30 (such as the locking device 34 described below) from being required to be pulled out of the sheath 20 and preventing the sheath 20 from being pulled out of the sheath 20, thereby improving the success rate of locking. In other embodiments, the support sleeve 70 may also be disposed through the sheath 20 and out of the blade tube 40, with the blade tube 40 moving axially within the support sleeve 70. In another embodiment, the distal end of the support sleeve 70 may also be coupled to the inner wall of the sheath 20 near the distal end or the distal end of the sheath 20, which also serves to reduce the probability of the sheath 20 being stretched and deformed.

In some embodiments, as shown in fig. 4, 6, 7 and 8, the driving mechanism 60 includes a screwing member 61 and a moving member 63, where both the screwing member 61 and the moving member 63 are movably disposed on the handle 10. The screw 61 is movable relative to the handle 10 in the axial direction of the sheath 20 and rotates around the axis of the sheath 20, the proximal end of the blade tube 40 is connected to the screw 61, and the blade tube 40 is driven by the screw 61 to move in the axial direction of the sheath 20 while rotating the blade tube 40 around its own axis relative to the sheath 20, so that the blade 421 can simultaneously apply pressure and cutting force to the suture thread 200 clamped between the blade 421 and the cutting part 316 during the contact of the blade 421 with the cutting part 316, thereby further reducing the difficulty of cutting the suture thread 200.

The moving member 63 is movable relative to the handle 10 in the axial direction of the sheath 20, and a proximal end or a position near the proximal end of the plunger 50 is connected to the moving member 63, and the plunger 50 is movable in the axial direction by the driving of the moving member 63. In this embodiment, the movable member 63 is connected to the proximal end of the precession member 61, the precession member 61 is provided with a through-hole 614 penetrating its own proximal and distal ends, the proximal end of the blade tube 40 is in communication with the through-hole 614, and the proximal end of the ejector 50 extends from the proximal end of the blade tube 40 and passes through the through-hole 614 to be connected to the movable member 63. By connecting the moving member 63 with the precession member 61, the axial pushing of the ejector rod 50 and the axial movement of the blade tube 40 can be simultaneously controlled by the driving mechanism 60 and the blade tube 40 can be rotated around the axis thereof, so that the locking of the suture thread 200 by the bolt head assembly 30 and the cutting of the locked suture thread 200 by the blade tube 40 can be simultaneously controlled by controlling the driving mechanism 60, the operation difficulty of the locking and cutting operation of the suture thread 200 in the suture thread locking system 100 is reduced, the operation steps are reduced, the operation efficiency is improved, and the operation time is shortened. In one embodiment, the first arrangement is that the screw 61 is rotatably connected to the moving member 63, such that the rotation of the screw 61 is not transmitted to the moving member 63, and thus, the movement of the screw 61 can only drive the moving member 63 to move axially, and further drive the push rod 50 to push the bolt head assembly 30 axially. In another embodiment, the second mode is provided, in which the screw 61 and the moving member 63 can be fixedly connected, at this time, the rotation energy of the screw 61 is transmitted to the moving member 63, and the movement of the screw 61 enables the moving member 63 to move axially and rotate, so as to drive the ejector rod 50 to move axially and push the bolt head assembly 30 rotationally.

Further, as shown in fig. 1, 2, 3 and 6, the driving mechanism 60 further includes a fixing member 62, the fixing member 62 is fixedly disposed on the handle 10, the fixing member 62 is provided with a threaded hole 621 extending along the axial direction of the sheath tube 20, the screw member 61 is provided with external threads and is threaded through the threaded hole 621 and is in threaded engagement with the threaded hole 621, a screw nut mechanism is formed between the fixing member 62 and the screw member 61, and when the screw member 61 rotates relative to the fixing member 62, the screw member 61 can also move axially while rotating around the axis of the screw member 61, so that the screw member 61 can push the blade tube 40 to move axially and also rotate around the axis of the screw member 40.

Further, as shown in fig. 3, 6 and 7, the driving mechanism 60 further includes a knob 64, the knob 64 is sleeved outside the screw 61 and rotatably disposed on the handle 10, one of an inner peripheral surface of the knob 64 and an outer peripheral surface of the screw 61 is provided with a sliding slot 6111, the other one of the two is provided with a sliding block 641 slidably engaged with the sliding slot 6111, and the sliding slot 6111 extends along an axial direction of the sheath 20. Understandably, the knob 64 and the screw 61 can be relatively moved in the axial direction of the sheath 20 by the engagement of the slide groove 6111 with the slider 641, but the engagement of the slide groove 6111 with the slider 641 restricts the knob 64 and the screw 61 from relatively rotating about their own axes. Therefore, when the knob 64 is driven to rotate, the knob 64 can drive the screw 61 to rotate around the own axis relative to the handle 10 and the fixing member 62 by the cooperation of the sliding groove 6111 and the sliding block 641, and the screw 61 moves relative to the handle 10 and the fixing member 62 in the axial direction of the sheath 20 simultaneously under the screw cooperation between the screw 61 and the fixing member 62. In this embodiment, the control knob 64 can control the axial pushing of the ejector rod 50 and the axial movement of the blade tube 40 and rotate around the axis thereof, so that the control knob 64 can control the latch head assembly 30 to latch the suture thread 200 and simultaneously control the blade tube 40 to cut off the latched suture thread 200, thereby reducing the operation difficulty of the latch and cutting operation of the suture thread 200 in the suture thread latching system 100, reducing the operation steps, being beneficial to improving the operation efficiency and shortening the operation time.

In some embodiments of the present invention, the plug head assembly 30 includes a plug seat 31 and a locking member 34, the plug seat 31 being disposed through the sheath 20 and fixedly attached to the sheath 20, the plug seat 31 having a seat hole 315 extending through its own proximal and distal ends, the locking member 34 being removably coupled to the plug seat 31 within the seat hole 315, the locking member 34 being adapted to lock the suture 200.

In some embodiments of the present invention, as shown in fig. 2,4 and 14, the locking element 34 comprises a pin head 32 and a pin 33, the pin head 32 being snapped into a socket 315, the pin head 32 having a pin hole 321 extending through its own proximal and distal ends, the pin hole 321 being in communication with the socket 315 and together defining a threading channel 301, the distal end of the support sleeve 70 being connected to the pin socket 31 and in communication with the pin hole 321. When the bolt head assembly 30 is in the initial state, the bolt 33 is arranged in the support sleeve 70 and between the bolt head 32 and the ejector rod 50, and the bolt 33 can move in the support sleeve 70 under the pushing of the ejector rod 50. In detail, when the push rod 50 moves distally, the push rod 50 pushes the latch 33 to move distally in the support sleeve 70, and under the continuous pushing of the push rod 50, the latch 33 can be inserted into the pin hole 321, so that the latch 33 is connected with the latch head 32 in a plugging manner, and the suture thread passing through the pin hole 321 is locked, and the latch head assembly 30 is converted into a locking state.

It should be noted that, when the bolt 33 is inserted into the pin hole 321, the bolt head 32 is at least partially deformed so that the bolt 33 is relatively firmly connected with the bolt head 32 in a plugging manner, the probability that the bolt 33 falls off from the pin hole 321 is reduced, and the firmness of the locking suture 200 of the bolt head assembly 30 is improved. In another embodiment, the pin 33 is at least partially compression deformed to provide a relatively secure plug connection of the pin 33 to the head 32. In other embodiments, the plug seat 31 may be omitted, the plug head 32 is directly connected with the sheath 20 in a close fit, and the force between the plug pin 33 and the plug head 32 is smaller than the force between the plug head 32 and the sheath 20, so that when the plug pin 33 is inserted into the pin hole 321 of the plug head 32, the plug head 32 is not pushed out of the sheath, for example, by providing friction surfaces with different friction coefficients between the plug pin 33, the plug head 32 and the sheath 20.

In this embodiment, particularly when the bolt head assembly 30 includes the bolt head 32 and the bolt 33, the screwing piece 61 is rotatably connected with the moving piece 63, so that the rotation of the screwing piece 61 is not transmitted to the moving piece 63, and the moving piece 63 only moves axially, so as to drive the ejector rod 50 to push the bolt 33 axially to insert the bolt head 32. In other embodiments, the precession member 61 may be fixedly coupled to the displacement member 63 such that rotation of the precession member 61 is transmitted to the displacement member 63, and movement of the precession member 61 causes both axial and rotational movement of the displacement member 63, thereby driving the ram 50 to both axially and rotationally urge the latch 33 into the latch head 32. In other embodiments, the locking element 34 may be in an automatic locking state, for example, a channel capable of being automatically locked is provided inside the locking element 34, the inner diameter of the channel is smaller than the outer diameter of the suture thread 200, the inside of the locking element 34 is made of an elastic material, the suture thread 200 penetrates through the channel, and the suture thread 200 and the locking element 34 can be mutually fixed without the action of external force.

In some embodiments of the present invention, as shown in fig. 4 and 12, the suture locking system 100 further includes a connection sleeve 80, wherein the connection sleeve 80 is sleeved outside the support sleeve 70 and is positioned in the seat hole 315, and two sides of the connection sleeve 80 are fixedly connected with the support sleeve 70 and the bolt seat 31 respectively. By arranging the connecting sleeve 80, the connecting sleeve 80 is sleeved outside the distal end of the supporting sleeve 70, then the connecting sleeve 80 is connected with the bolt seat 31, the bolt seat 31 is connected with the sheath 20, glue can be added to the sheath 20, the bolt seat 31, the connecting sleeve 80 and the supporting sleeve 70 to be connected with each other, the four can be kept relatively fixed, the firmness of connection between the connecting sleeve 80 and the supporting sleeve 70, the bolt seat 31 and the sheath 20 is improved, so that the pushing force of the ejector rod 50 towards the distal end is at least offset by the supporting sleeve 70, the supporting sleeve 70 can better help the sheath 20 to share the pushing force of the ejector rod 50 towards the distal end, the probability of the sheath 20 being stretched and deformed is reduced, and the sheath 20 which is not stretched and deformed due to the stretching and deformation of part of elements (such as a locking piece 34 described below) of the bolt head assembly 30 is prevented from falling off from the sheath 20 when the sheath 20 is required, and the success rate of locking is improved. The sheath 20, the bolt seat 31, the connecting sleeve 80 and the supporting sleeve 70 are connected with each other through glue, and can be also connected through welding and the like.

Further, as shown in fig. 4 and 5, an annular groove 3154 extending in the circumferential direction of the seat hole 315 is provided in the seat hole 315, and the connection sleeve 80 is provided in the annular groove 3154. By providing the annular groove 3154 in the seat hole 315, when the pushing force of the push rod 50 is transferred to the bolt seat 31, the proximal end of the connecting sleeve 80 can abut against the side wall of the annular groove 3154, so that the probability that the connecting sleeve 80 is pulled out of the seat hole 315 under the pulling force of the supporting sleeve 70 is reduced.

In some embodiments of the present invention, as shown in fig. 10 and 12, the outer circumferential surface of the support sleeve 70 is provided with a first wire passing hole 71, the outer circumferential surface of the sheath 20 is provided with a second wire passing hole 21, the suture 200 may be inserted into the support sleeve 70 through the threading channel 301 and sequentially extend out of the sheath 20 through the first wire passing hole 71 and the second wire passing hole 21, such that at least a portion of the suture 200 is interposed between the cutting part 316 and the blade part 421, and when the blade tube 40 is moved distally by the driving mechanism 60, the suture 200 may be clamped between the blade part 421 and the cutting part 316, and the suture 200 may be cut. In one embodiment, only the first wire passing hole 71 of the support sleeve 70 may be provided, for example, after threading the suture 200 through the first wire passing hole 71, the suture may extend along the lumen of the sheath 20 to the proximal end of the sheath 20, at least a portion of the suture 200 may be interposed between the cutting portion 316 and the blade portion 421, and when the blade tube 40 is driven by the driving mechanism 60 to move distally, the suture 200 may be clamped between the blade portion 421 and the cutting portion 316 and the suture 200 may be cut. In an embodiment, only the second wire passing hole 21 of the outer circumferential surface of the sheath 20 may be provided, and the suture 200 may be passed through the support sleeve 70 instead of passing through the distal end of the support sleeve 70 while passing between the cutting part 316 and the blade part 421 after passing through the hole 321, and the support sleeve 70 may be sleeved outside the blade tube 40.

As shown in fig. 2,3, 6 and 8, since the ejector pin 50, the support sleeve 70, the blade tube 40 and the sheath tube 20 are sequentially nested from inside to outside, and the sheath tube 20 and the support sleeve 70 are fixedly connected to the handle 10, the proximal ends of the ejector pin 50 and the blade tube 40 are connected to the driving mechanism 60 and are respectively movable relative to the sheath tube 20 and the support sleeve 70 along the axial direction of the sheath tube 20, in order to achieve the above-mentioned functions and prevent mutual interference among the ejector pin 50, the support sleeve 70, the blade tube 40 and the sheath tube 20, in some embodiments of the present invention, the following schemes are given:

further, referring to fig. 3, the handle 10 has a receiving cavity 101, the proximal end of the sheath 20 is connected to the distal end of the handle 10 and is in communication with the receiving cavity 101, and a second fixing groove 105 and a supporting portion 106 are sequentially provided on an inner wall of the receiving cavity 101 in a direction from the distal end to the proximal end, referring to fig. 8 and 9, the second fixing groove 105 and the supporting portion 106 are both located in the receiving cavity 101, the fixing member 62 is fixedly installed in the second fixing groove 105, and the proximal end of the blade tube 40 extends from the proximal end of the sheath 20 and into the receiving cavity 101 and is inserted into the through hole 614 of the screw 61 and is fixedly connected with the screw 61. The proximal end of the screw 61 is rotatably connected to the moving member 63, one of the moving member 63 and the handle 10 is provided with a first sliding structure 102 extending in the axial direction of the sheath 20, and the other one of the moving member 63 and the handle 10 is provided with a second sliding structure 6301 slidably connected to the first sliding structure 102, so that the screw 61 can drive the moving member 63 to move in the axial direction of the support sleeve 70 and the moving member 63 cannot rotate together with the screw 61 under the restriction of the first sliding structure 102 and the second sliding structure 6301. The moving member 63 is provided with a relief groove 6302, the proximal end of the through hole 614 is communicated with the relief groove 6302, the supporting portion 106 protrudes radially from the sheath 20 and extends into the relief groove 6302, the proximal end of the support sleeve 70 extends into the relief groove 6302 from the proximal end of the through hole 614 and is connected to the supporting portion 106, and the proximal end of the ejector rod 50 extends from the proximal end of the support sleeve 70 and is connected to the moving member 63.

In an embodiment of the present invention, the sheath 20 is disposed coaxially with the blade tube 40.

The technical scheme of the invention will be further described in detail below with reference to specific examples.

Example 1

In this embodiment, as shown in connection with FIGS. 1, 2, 4 and 6, the suture locking system 100 includes a handle 10, a sheath 20, a plug assembly 30, a blade tube 40, a push rod 50, a support sleeve 70, a connection sleeve 80 and a drive mechanism 60.

Specifically, as shown in fig. 2 and 3, the handle 10 includes an upper housing 11, a lower housing 12, an end cap 13, and a stress relief sleeve 14, where the upper housing 11 and the lower housing 12 are disposed in a butt joint, an accommodating cavity 101 is defined between the upper housing 11 and the lower housing 12, the end cap 13 is in a tapered housing shape, the stress relief sleeve 14 includes a fixing portion 141 and a tubular portion 142 connected to each other, the tubular portion 142 is in an axially extending tubular structure, the fixing portion 141 is disposed at a proximal end of the tubular portion 142, a first fixing groove 103 for mounting the fixing portion 141 and an end cap mounting portion 104 disposed at a distal end side of the first fixing groove 103 are disposed at distal ends of the upper housing 11 and the lower housing 12, the end cap 13 is mounted on the end cap mounting portion 104, the fixing portion 141 is mounted in the first fixing groove 103, and a distal end of the tubular portion 142 sequentially penetrates the end cap mounting portion 104 and the end cap 13 and protrudes from a distal end of the end cap 13. The proximal end of the sheath 20 is inserted into the tubular portion 142 of the de-stressing sleeve 14 and fixedly connected to the tubular portion 142, and the proximal end of the sheath 20 communicates with the receiving chamber 101.

As shown in fig. 2 and 4, the plug assembly 30 includes a plug seat 31, a plug head 32, and a plug pin 33, and the plug seat 31 is inserted into the sheath 20 and fixedly connected with the sheath 20.

Specifically, as shown in fig. 4 and 5, along the axial direction of the sheath 20, the outer peripheral surface of the plug seat 31 is configured to be stepped, the plug seat 31 includes a first step 311, a second step 312 and a third step 313 that are sequentially connected, wherein the first step 311 is located at a distal end, the third step 313 is located at a proximal end, the outer diameter of the first step 311 is larger than the outer diameter of the third step 313, the outer diameter of the third step 313 is larger than the outer diameter of the second step 312, the sheath 20 is sleeved outside the second step 312 and the third step 313, a step surface 314 facing the proximal end is formed between the first step 311 and the second step 313, the distal end of the sheath 20 abuts against the step surface 314, and a gap is formed between the inner wall surface of the sheath 20 and the outer peripheral surface of the second step 312, the gap is used for accommodating glue, and after the glue is solidified, the sheath 20 and the plug seat 31 have better connection strength.

The bolt seat 31 is provided with a seat hole 315 penetrating through the proximal end and the distal end of the bolt seat 31, a clamping groove 3153 is further arranged in the seat hole 315, the clamping groove 3153 is annular and extends along the circumferential direction of the seat hole 315, the outer circumferential surface of the proximal end of the bolt head 32 is provided with an annular protrusion 322 matched with the clamping groove 3153 in a clamping manner, the bolt head 32 is connected with the bolt seat 31 in a clamping manner through the matching of the annular protrusion 322 and the clamping groove 3153, and when the bolt head 32 receives thrust towards the distal end and the thrust is larger than the clamping force of the annular protrusion 322 and the clamping groove 3153, the bolt head 32 can fall off from the bolt seat 31. In order to enable the plug 32 to be smoothly removed, the distal end of the annular protrusion 322 and the distal end side wall of the locking groove 3153 are both provided with inclined surfaces.

Further, the outer peripheral surface of the distal end of the plug head 32 is convexly provided with a stop portion 323, the distal end surface of the plug seat 31 is provided with a stop groove 317, and the proximal end surface of the stop portion 323 is in stop fit with the side wall of the proximal end of the stop groove 317, so as to prevent the plug head 32 from being too deep into the plug seat 31 when being assembled into the plug seat 31.

The bolt head 32 has a pin hole 321 penetrating its own proximal and distal ends, the pin hole 321 communicates with the seat hole 315 and defines the threading channel 301 together, an annular groove 3154 extending along the circumferential direction of the seat hole 315 is provided in the seat hole 315, the annular groove 3154 is located at one side of the proximal end of the clamping groove 3153, the connecting sleeve 80 is provided in the annular groove 3154 and sleeved outside the supporting sleeve 70, and the sheath 20, the bolt seat 31, the connecting sleeve 80 and the supporting sleeve 70 are adhered and fixed by glue. The distal end of the support sleeve 70 abuts the proximal end of the plug 32 and the distal end of the support sleeve 70 communicates with the pin bore 321. The ejector pin 50 is disposed in the support sleeve 70 and is axially movable relative to the support sleeve 70, the latch 33 is disposed in the support sleeve 70 between the latch head 32 and the distal end of the ejector pin 50, the latch 33 is movable in the support sleeve 70 under the pushing of the ejector pin 50, when the ejector pin 50 moves distally, the ejector pin 50 pushes the latch 33 to move distally in the support sleeve 70, and under the continuous pushing of the ejector pin 50, the latch 33 is inserted into the pin hole 321, so that the latch 33 is connected with the latch head 32 in an inserting manner, and a suture thread penetrating through the pin hole 321 is locked.

In this embodiment, as shown in fig. 4 and 5, the proximal end of the pin bore 321 is flared to facilitate insertion of the pin bore 321 in the latch 33 to provide guidance. The latch 33 includes a cylindrical main body 331, a stopper 332 provided at a proximal end of the main body 331, and a boss 333 provided around an outer peripheral surface of the main body 331. The distal end of the body portion 331 is configured with a smoothly transitioned arcuate surface that provides a guiding function during insertion of the latch 33 into the pin bore 321. The distal end surface of the boss 333 is provided as an inclined surface, and the maximum outer diameter of the boss 333 is larger than the inner diameter of the pin hole 321, when the main body 331 of the latch 33 is inserted into the pin hole 321, the boss 333 is elastically deformed and radially compressed, the latch 33 is firmly fixed in the pin hole 321 by the elastic force generated by the deformation of the boss 333, and the suture thread passing through the pin hole 321 is locked. The outer diameter of the limiting part 332 is larger than that of the pin hole 321, so that the distal end surface of the limiting part 332 abuts against the proximal end surface of the bolt head 32 to limit the depth dimension of the bolt 33 inserted into the bolt head 32, and when the ejector rod 50 continuously moves distally, the bolt head 32 is pushed to fall off from the seat hole 315 by the limiting part 332. In another embodiment, the bolt head 32 is easily deformed in the bolt 33 and the bolt head 32, the outer diameter of the bolt 33 is larger than the inner diameter of the pin hole 321 of the bolt head 32, the bolt head 32 can be expanded and deformed by inserting the bolt 33 into the bolt head 32, and the inner diameter of the pin hole 321 can be enlarged by the bolt 33, so that the bolt 33 can be firmly fixed in the pin hole 321.

Further, the blade tube 40 is sleeved outside the support sleeve 70 and is located in the sheath tube 20, the blade tube 40 can move relative to the sheath tube 20 along the axial direction of the sheath tube 20, the distal end of the blade tube 40 is provided with a blade portion 421, the proximal end of the plug seat 31 is provided with a cutting portion 316, the cutting portion 316 is specifically a cutting surface formed on the proximal end face of the plug seat 31, the blade portion 421 is disposed opposite to the cutting portion 316 along the axial direction of the sheath tube 20, and when the blade tube 40 moves along the axial direction, the blade portion 421 and the cutting portion 316 can be switched between a separated state and a contact state.

As shown in fig. 12, the outer circumferential surface of the support sleeve 70 is provided with a first wire passing hole 71, the outer circumferential surface of the sheath 20 is provided with a second wire passing hole 21, the suture thread 200 can be inserted into the support sleeve 70 through the threading channel 301 and sequentially pass through the first wire passing hole 71 and the second wire passing hole 21 to extend out of the sheath 20, at least part of the suture thread 200 is arranged between the cutting part 316 and the blade part 421, and when the blade tube 40 moves distally, the suture thread 200 can be clamped between the blade part 421 and the cutting part 316 and the suture thread 200 is cut.

In this embodiment, please combine fig. 2, fig. 6, fig. 7 and fig. 8 to show, the actuating mechanism 60 includes precession piece 61, fixed piece 62, moving piece 63 and knob 64, from distal end to the direction of proximal end, the inner wall of holding chamber 101 is equipped with second fixed slot 105 and supporting part 106 of looks interval in proper order, fixed piece 62 fixed mounting is in second fixed slot 105, fixed piece 62 is equipped with along the axial extension of sheath 20 and runs through the screw hole 621 of proximal end and distal end of fixed piece 62, precession piece 61 wholly takes the rectangular shape along axial extension, and from proximal end to distal end's direction, precession piece 61 includes sliding connection portion 611 that links gradually, screw-thread fit portion 612 and connecting rod portion 613, screw-thread fit portion 612's outer peripheral face is equipped with the external screw thread with the screw hole screw-thread fit, screw-thread fit portion 612 of precession piece 61 wears to locate in the screw hole 621 of fixed piece 62, sliding connection portion 611 is located one side of the distal end of fixed piece 62, connecting rod portion 613 is located one side of the proximal end of fixed piece 62, sliding connection portion's outer peripheral face 611 is equipped with along sheath 20 and runs through the screw-thread hole 621, sliding piece 641 is equipped with slider 641 and can be located along the axial direction of the inner wall 641 of sheath element 641 and the axial extension of knob piece 10, can be with the inside the axial extension of knob piece 10 and knob 641, can be with the axial extension of knob piece 10, and knob piece 10 is located along the axial direction of knob piece 10, and knob 641 is relatively to the axial extension 10 is equipped with the inner piece 1, can be through the axial extension of knob piece 1 through the axial slider's is equipped with the axial slider's 1, and can be through the axial slider's is relatively down, can be through the axial extension, can be through the axial slider is equipped with the axial slider is placed.

Further, as shown in fig. 3, 6,7 and 11, the screw 61 is provided with a through hole 614 penetrating the proximal end and the distal end thereof, the sliding connection portion 611 is further provided with a plurality of first pin holes 6112 arranged along the radial direction of the sheath 20, the first pin holes 6112 are communicated with the through hole 614, the outer circumferential surface of the blade tube 40 is provided with a first clamping groove 401, the first clamping groove 401 is arranged near the proximal end of the blade tube 40, the proximal end of the blade tube 40 is inserted into the through hole 614, and the first pin 1001 is inserted into the first pin hole 6112, and the part of the pin extending into the through hole 614 is clamped into the first clamping groove 401, thereby fixedly connecting the proximal end of the blade tube 40 with the screw 61.

In some embodiments, two of the plurality of first clamping grooves 401 are in a group, the plurality of first clamping grooves 401 are sequentially spaced along the axial direction of the blade tube 40, two of the plurality of first clamping grooves 401 in each group are respectively located at the left side and the right side of the axial direction of the blade tube 40, two of the plurality of first pin holes 6112 are in a group, the plurality of first pin holes 6112 are sequentially spaced along the axial direction of the blade tube 40, two of the plurality of first pin holes 6112 in each group are respectively located at the left side and the right side of the axial direction of the through hole 614, and the two of the first pin holes 6112 in each group can be aligned with the two of the first clamping grooves 401 in each group, so that the two first pins 1001 embedded in the first pin holes 6112 can be respectively clamped into the two first clamping grooves 401. It should be noted that, by arranging the plurality of groups of the first clamping grooves 401 and the plurality of groups of the first pin holes 6112 along the axial direction, the connection firmness degree of the blade tube 40 and the screw 61 can be improved, and the relative positions of the blade tube 40 and the bolt head assembly 30 in the axial direction can be adjusted by adjusting the alignment of the first clamping grooves 401 and the first pin holes 6112 of different groups according to the requirement, so as to adjust the relative positions between the distal end of the blade tube 40 and the distal end of the ejector rod 50, thereby ensuring that the blade portion 421 at the distal end of the blade tube 40 can be contacted with the cutting portion 316 and cut off the suture thread 200 after the bolt 33 is completely inserted into the bolt head 32. In other embodiments, the first detent 401 may be one.

Further, as shown in fig. 6 and 7, the moving member 63 includes a rotational connection portion 631 and a fixed connection portion 632 that are disposed at intervals along the axial direction of the sheath 20, the moving member 63 further includes a first side wall 633 and a second side wall 634 that connect the rotational connection portion 631 and the fixed connection portion 632, the first side wall 633 and the second side wall 634 are disposed at intervals along the radial direction of the sheath 20, and a avoiding groove 6302 is defined among the rotational connection portion 631, the first side wall 633, the fixed connection portion 632 and the second side wall 634. The rotation coupling portion 631 is provided with a rotation limiting hole 6311 penetrating the proximal and distal ends thereof, and the rotation coupling portion 631 is further provided with a second pin hole 6312 extending in the radial direction of the sheath 20, the second pin hole 6312 communicating with the rotation limiting hole 6311.

As shown in fig. 3,6 and 7, a plurality of rotation limiting portions 6131 are sequentially disposed at intervals along the axial direction of the sheath tube 20 at the proximal end of the connecting rod portion 613 of the precession member 61, the rotation limiting portions 6131 are annular and are convexly disposed on the outer peripheral surface of the connecting rod portion 613, a limiting gap 6132 is disposed between two adjacent rotation limiting portions 6131, the distal end of the connecting rod portion 613 is rotatably inserted into the rotation limiting hole 6311, a second pin shaft 1002 is embedded into the second pin shaft hole 6312, and a portion of the second pin shaft 1002 located in the rotation limiting hole 6311 is disposed in the limiting gap 6132, so that the second pin shaft 1002 is respectively in stop fit with two adjacent rotation limiting portions 6131 along the axial direction of the sheath tube 20, thereby enabling the precession member 61 to rotate around the axis of the blade tube 40 relative to the moving member 63, but limiting the relative movement of the precession member 61 and the moving member 63 along the axial direction of the sheath tube 20 by the stop fit of the second pin shaft 1002 and the rotation limiting portions 6131.

As shown in fig. 8, 9 and 10, the supporting portion 106 includes a plurality of plate-shaped side plate portions disposed along the radial direction of the sheath 20 and having an opening at one side formed between the plurality of side plate portions, the outer circumferential surface of the supporting sleeve 70 is provided with a second locking groove 72, the proximal end of the supporting sleeve 70 extends from the proximal end of the blade tube 40 and passes through the through hole 614 to extend into the avoiding groove 6302, the suture locking system 100 further includes a tube clip 1003, the tube clip 1003 is provided with a third locking groove 10031 having an opening at one end, the tube clip 1003 is inserted into the slot 1061, and the tube clip 1003 is locked into the second locking groove 72 of the supporting sleeve 70, such that the tube clip 1003 is respectively in stop fit with the proximal side wall and the distal side wall of the second locking groove 72, thereby restricting the supporting sleeve 70 from moving relative to the handle 10 along the axial direction of the sheath 20.

In some embodiments, as shown in fig. 10, the outer peripheral surface of the support sleeve 70 is provided with a plurality of second clamping grooves 72, two of the plurality of second clamping grooves 72 are grouped, a plurality of groups of second clamping grooves 72 are sequentially arranged at intervals along the axial direction of the support sleeve 70, two second clamping grooves 72 in each group are respectively positioned at the left side and the right side of the axial line of the support sleeve 70, the support part 106 is provided with a plurality of slots 1061, and each slot 1061 is provided with a pipe clamp 1003 and corresponds to one second clamping groove 72 so as to improve the connection strength between the support sleeve 70 and the support part 106. In other embodiments, the number of second detents 72 may be one.

Further, as shown in fig. 3, 6 and 8, the fixing connection portion 632 is provided with a first fastening hole 6321 extending in an axial direction and a second fastening hole 6322 extending in a radial direction of the sheath tube 20, the second fastening hole 6322 is configured as a threaded hole, the second fastening hole 6322 is communicated with the first fastening hole 6321, a fastening screw 1004 is provided in the second fastening hole 6322, a proximal end of the ejector rod 50 is inserted into the first fastening hole 6321, and the fastening screw 1004 passing through the second fastening hole 6322 locks and fixes the ejector rod 50 and the fixing connection portion 632.

Further, as shown in fig. 8, one of the moving member 63 and the handle 10 is provided with a first sliding structure 102 extending along the axial direction of the sheath 20, and the other one of the moving member 63 and the handle 10 is provided with a second sliding structure 6301 slidably connected with the first sliding structure 102, so that the screw 61 can drive the moving member 63 to move along the axial direction of the support sleeve 70 and the moving member 63 cannot rotate together with the screw 61 under the restriction of the first sliding structure 102 and the second sliding structure 6301.

It is understood that the first sliding structure 102 and the second sliding structure 6301 may be configured in various sliding manners, for example, the first sliding structure 102 is a sliding slot, the second sliding structure 6301 is a sliding block that is slidably matched with the sliding slot, for another example, the first sliding structure 102 is configured as a sliding rod, and the second sliding structure 6301 is configured as a sliding hole that is slidably matched with the sliding rod.

In this embodiment, the control knob 64 can control the axial pushing of the ejector rod 50 and the axial movement of the blade tube 40 and rotate around the axis thereof, so that the control knob 64 can control the latch head assembly 30 to latch the suture thread 200 and simultaneously control the blade tube 40 to cut off the latched suture thread 200, thereby reducing the operation difficulty of the latch and cutting operation of the suture thread 200 in the suture thread latching system 100, reducing the operation steps, being beneficial to improving the operation efficiency and shortening the operation time. It should be further noted that, by adding the support sleeve 70, the support sleeve 70 is utilized to offset the pushing force of at least part of the ejector rod 50 towards the distal end, so that the support sleeve 70 can better help the sheath 20 share the pushing force of the ejector rod 50 towards the distal end, thereby reducing the probability of the sheath 20 being stretched and deformed.

In some embodiments of the present invention, as shown in fig. 1, 2, 12 and 14, the suture locking system 100 further includes a thread guide 90, wherein the thread guide 90 includes a thread guide handle 91 and a thread guide 92 connected to the thread guide handle 91, and a distal end of the thread guide 92 may sequentially extend into the support sleeve 70 through the second thread passing hole 21 and the first thread passing hole 71, and then pass out from a distal end of the bolt head 32 through the seat hole 315 of the bolt seat 31 and the pin hole 321 of the bolt head 32, and the thread guide 92 is formed in a ring-shaped sleeve structure formed by folding one thread. The lead handle 91 is substantially in a flat plate shape, and a plurality of elongated protrusions extending along the plate surface are concavely provided on both side plate surfaces of the lead handle 91 to increase friction and facilitate gripping, and two cantilever portions 911 are provided at one end of the lead handle 91 at intervals, the two cantilever portions 911 being adapted to clamp the lead handle 91 outside the sheath 20 and being slidable relative to the sheath 20 in the axial direction of the sheath 20.

In this embodiment, the suture locking process of the suture locking system 100 operates as follows:

Taking the oval hole suture operation as an example, after the oval hole suture operation is completed, the end part of the suture 200 is exposed outside the body, firstly, the exposed part of the suture 200 exposed outside the body is captured by utilizing the lead wire 92, the lead wire handle 91 is controlled to slide along one side of the axial proximal end of the sheath 20, the exposed part of the suture 200 is pulled by the lead wire 92 to pass through the pin hole 321 and the seat hole 315 sequentially and enter the supporting sleeve 70, then the suture passes through the first through hole 71 and the second through hole 21 and passes out of the sheath 20, then, the distal end of the sheath 20 is pushed to a suture position under the guidance of the suture 200 by controlling the suture locking system 100, the knob 64 is driven to rotate, the ejector rod 50 and the blade tube 40 are simultaneously pushed to the distal end, the ejector rod 50 is continuously pushed by the ejector rod 50, the latch 33 can be inserted into the pin hole 321, the latch 33 is integrally connected with the latch head 32 in a plug-in a plug manner, the blade part 421 penetrating into the pin hole 321 is further pulled by the lead wire 92 to enter the supporting sleeve 70, the blade part 421 of the blade tube 40 is moved to abut against the cutting part 316 of the latch 31, and the suture is further driven by the knob 64, the distal end 40 is moved to the distal end of the suture 200 is simultaneously pushed out of the sheath 20 around the seat 31, the blade part 421 is simultaneously, the suture is further pushed out of the blade part 200 is continuously to the blade part of the suture 200 is continuously pushed from the needle hole 200 by the drive the blade 31, and the clamp the suture 200 is continuously, and finally, the suture is pushed out of the blade part is continuously pushed from the blade 31 to the blade 31 and the latch 31 is continuously and pushed from the needle 200 is continuously pushed to the position and pushed to the suture end, and the suture is continuously and pushed to the cut.

In other embodiments of the present invention, as shown in fig. 13, the cutting part 316 is provided on the inner wall surface of the threading passage 301, the blade 421 is formed on the outer circumferential surface of the blade tube 40, and the outer circumferential surface of the blade 421 is in contact engagement with the inner circumferential surface of the cutting part 316. In this embodiment, the seat hole 315 of the plug seat 31 is configured to be stepped, the seat hole 315 includes a first step segment 3151 and a second step segment 3152 which are communicated, the first step segment 3151 is located at a proximal end with respect to the second step segment 3152, an inner diameter of the first step segment 3151 is larger than an inner diameter of the second step segment 3152, an inner wall of the first step segment 3151 forms a cutting part 316, a distal end of the blade tube 40 is insertable into the seat hole 315 of the first step segment 3151, and a blade 421 is formed on an outer circumferential surface of the blade tube 40 and is capable of being in contact engagement with the inner wall of the first step segment 3151, and during an axial movement of the blade tube 40 and rotation about its own axis by the steering knob 64, the blade 421 continuously cuts the suture thread 200 located between the blade 421 and the cutting part 316 during rotation, thereby cutting the suture thread 200.

Example 2

The differences between embodiment 2 and embodiment 1 will be described below, and the details of embodiment 2 that are the same as or similar to embodiment 1 will not be described here again.

In this embodiment, as shown in fig. 11 and 12, the blade tube 40 includes a main body section 41 and a cutting section 42 connected to the distal end of the main body section 41, the blade 421 is provided at the distal end of the cutting section 42, and the bending resistance of the cutting section 42 is higher than that of the main body section 41.

Specifically, the main body section 41 has higher bending performance relative to the cutting section 42, so that the main body section 41 can conform to the bending structure of the blood vessel inside the human body, and the main body section 41 is beneficial to being more smoothly inserted into the target position inside the human body along with the sheath 20. The cutting segment 42 has better stiffness, rigidity and bending resistance than the main body segment 41, and the cutting segment 42 can apply sufficient pressure and cutting force to the suture thread 200 between the blade 421 and the cutting part 316 to ensure that the blade 421 cuts the suture thread 200 during pushing the blade 421 at the distal end of the blade tube 40 and performing the cutting action.

In some embodiments, the material of the cutting segment 42 and the body segment 41 is the same, but the wall thickness of the body segment 41 is less than the wall thickness of the cutting segment 42, such that the bending properties of the body segment 41 are higher than those of the cutting segment 42, i.e., the body segment 41 has better compliance with respect to the cutting segment 42.

In some embodiments, as shown in fig. 12, the cutting section 42 and the main body section 41 are made of different materials, and the hardness and rigidity of the material of the cutting section 42 are higher than those of the main body section 41, for example, the cutting section 42 may be made of steel, the supporting performance of the cutting section 42 is higher than that of the main body section 41, at least part of the cutting section 42 is sleeved outside the main body section 41, and the cutting section 42 and the main body section 41 are connected into an integral structure by means of laser welding, soldering, adhesive bonding, or the like.

The above-mentioned embodiments are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention should be covered in the protection scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. The suture locking system is characterized by comprising a sheath tube, a bolt head assembly arranged at the distal end of the sheath tube, a support sleeve arranged in the sheath tube and a push rod movably arranged in the support sleeve, wherein the bolt head assembly is used for locking a suture, the distal end of the support sleeve is connected with the bolt head assembly, or the distal end of the support sleeve is connected with the inner wall of the sheath tube close to the distal end or the distal end of the sheath tube, the proximal end of the support sleeve is fixed, and in the process of moving the push rod towards the distal end, the distal end of the push rod can push the bolt head assembly to push at least part of the bolt head assembly out of the sheath tube.

2. The suture tying system of claim 1, wherein the plug head assembly comprises a plug seat disposed through and fixedly secured to the sheath, the plug seat having a seat aperture extending therethrough at proximal and distal ends thereof, and a locking member removably connected with the plug seat within the seat aperture, the locking member for locking the suture.

3. The suture locking system of claim 2, wherein the distal end of the support sleeve is fixedly secured to the boss.

4. The suture locking system of claim 3, further comprising a connecting sleeve sleeved outside the support sleeve and positioned within the seat bore, wherein two sides of the connecting sleeve are fixedly connected with the support sleeve and the bolt seat, respectively.

5. The suture locking system of claim 4, wherein an annular groove extending circumferentially of the socket is provided in the socket, the connection sleeve being provided in the annular groove.

6. The suture locking system of claim 5, further comprising a drive mechanism including a displacement member that is movable in an axial direction of the sheath, the proximal end or proximal position of the plunger being coupled to the displacement member.

7. The suture locking system of claim 6, further comprising a handle in which the displacement member is disposed, one of the displacement member and the handle being provided with a first sliding structure extending in an axial direction of the sheath, the other of the displacement member and the handle being provided with a second sliding structure in sliding connection with the first sliding structure.

8. The suture locking system of any one of claims 2 to 7 wherein,

The locking piece comprises a bolt head and a bolt pin, the bolt head is detachably arranged in the seat hole, the bolt head is provided with a pin hole penetrating through the proximal end and the distal end of the bolt head, and the suture thread can extend into the sheath tube through the pin hole;

The locking piece is provided with an initial state and a locking state, in the initial state, the bolt is arranged in the support sleeve and positioned between the bolt head and the ejector rod, the bolt can move in the support sleeve under the pushing of the ejector rod, and in the locking state, the bolt is inserted into the pin hole.

9. The suture locking system of claim 2, further comprising a blade tube movably disposed within the sheath, the peg being provided with a cutting portion, a distal end of the blade tube being provided with a blade portion disposed opposite the cutting portion;

The outer peripheral surface of the support sleeve is provided with a first wire passing hole, the outer peripheral surface of the sheath tube is provided with a second wire passing hole, the suture thread can extend into the support sleeve through the seat hole and sequentially pass through the first wire passing hole and the second wire passing hole to penetrate out of the sheath tube, and at least part of the suture thread is arranged between the cutting part and the blade part.

10. The suture locking system of claim 9, wherein the blade tube comprises a main body section and a cutting section connected to a distal end of the main body section, the blade being disposed at the distal end of the cutting section, the cutting section having a higher resistance to bending than the main body section.