A suture device

Abstract

The present invention belongs to the technical field of medical devices, and discloses a suturing device, which includes a handle, a puncture tube, a hollow push rod, an internal push rod, a first pushing mechanism, and a second pushing mechanism. The handle includes a receiving chamber; the puncture tube is arranged at the distal end of the handle; the hollow push rod is inserted into the puncture tube; the internal push rod is inserted into the hollow push rod, and the distal end of the internal push rod is provided with barbs, the first pushing mechanism is arranged in the receiving chamber and connected to the proximal end of the internal push rod, and the second pushing mechanism includes a limiter and a first guide column, the limiter is fixed in the receiving chamber, the first guide column is fixedly connected to the proximal end of the hollow push rod, and the first guide column is provided with a plurality of limiters in parallel along the axial direction. In the suturing device provided by the present invention, the first pushing mechanism cooperates with the limiter, and whenever it reciprocates between the proximal position and the distal position, the first guide column will move toward the distal end by a distance of a limiter, and push the distal implant out of the puncture tube through the hollow push rod or the internal push rod.

Description

Technical Field

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

[0002] At present, meniscus suturing is the most commonly used surgical method for treating meniscus injuries. During the operation, the doctor needs to hold the handle of the stapler and apply external pressure to the stapler to implant the built-in fixator in the stapler into the tearing site. The implant is then pushed out of the stapler through the pushing part on the stapler handle and implanted into the repair site.

[0003] In the related art, some sutures can implant two rigid implants in sequence, and some sutures can implant two flexible implants in sequence. When more implants need to be implanted, the corresponding sutures need to be replaced for repeated repair operations; when different types of implants need to be replaced, the corresponding sutures also need to be replaced, which is limited in use, not conducive to the doctor's surgical operation, and increases the duration and difficulty of the operation, while increasing the economic burden on patients. Summary of the invention

[0004] The object of the present invention is to provide a stapler which can implant different kinds of implants and can implant more implants.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Provided is a stapler, comprising:

[0007] A handle including a receiving cavity;

[0008] A puncture tube is disposed at the distal end of the handle and is in communication with the accommodating cavity, wherein the distal end of the puncture tube can accommodate a plurality of implants;

[0009] A hollow push rod is inserted into the puncture tube, and the proximal end of the hollow push rod extends into the accommodating cavity;

[0010] An internal push rod is inserted into the hollow push rod, and the proximal end of the internal push rod extends out of the proximal end of the hollow push rod, the distal end of the internal push rod can extend out of the distal end of the hollow push rod, and the distal end of the internal push rod is provided with a barb;

[0011] A first pushing mechanism, disposed in the accommodating cavity and connected to the proximal end of the internal push rod, the first pushing mechanism moves axially relative to the handle and has a proximal position and a distal position;

[0012] The second pushing mechanism includes a limiter and a first guide column, wherein the limiter is fixed in the accommodating cavity, the first guide column is fixedly connected to the proximal end of the hollow push rod, and the first guide column is provided with a plurality of limiters arranged side by side along the axial direction; wherein,

[0013] At the proximal position, a limiting fit is formed between the first pushing mechanism and one of the limiting parts to block the first guide post from moving toward the proximal end in the axial direction; the limiting part adjacent to the proximal side of the limiting part that forms a limiting fit with the first pushing mechanism forms a limiting fit with the limiting member to block the first guide post from moving toward the proximal end in the axial direction;

[0014] At the distal position, a limiting fit is formed between the first pushing mechanism and one of the limiting parts for axially blocking the first guide column from moving toward the proximal end; an adjacent limiting part spaced apart from the proximal side of the limiting part that forms a limiting fit with the first pushing mechanism forms a limiting fit with the limiting member, or the first guide column is disengaged from the limiting member.

[0015] Optionally, the first pushing mechanism includes:

[0016] The guide member can form a limiting fit with the limiting member to block the first guide column from moving toward the proximal end along the axial direction;

[0017] A fixing block, detachably connected to the guide member, the fixing block is provided with a first through hole, and the proximal end of the internal push rod is passed through the first through hole;

[0018] The fastener is radially penetrated through the fixing block and abuts against the periphery of the inner push rod.

[0019] Optionally, the guide member includes a second guide column, a proximal end of the second guide column extends to form a connecting arm, a proximal end of the connecting arm is provided with a first buckle, a first slot is provided on the fixing block, and the first buckle is engaged with the first slot.

[0020] Optionally, the limiting portion includes a limiting plane and a tapered surface provided on the distal end side of the limiting plane;

[0021] The guide member includes a second guide column and a first elastic arm arranged at the proximal end of the second guide column. The proximal end of the first elastic arm is provided with a limiting undercut, and the limiting undercut can form a limiting fit with the limiting plane to axially block the first guide column from moving toward the proximal end.

[0022] Optionally, it also includes a push ring, which is slidably mounted on the outer periphery of the handle and connected to the guide member. The push ring can drive the first pushing mechanism to move axially relative to the handle through the guide member.

[0023] Optionally, two guide channels communicating with the accommodating cavity are provided at intervals on the outer periphery of the handle, and the guide member comprises a second guide column, and a fixing hole is provided on the periphery of the second guide column;

[0024] The push ring includes two mutually connected half rings, and guide protrusions are provided on the inner ring surfaces of the two half rings. The guide protrusions pass through the guide channels in a one-to-one correspondence, and the guide protrusions extend into the fixing hole.

[0025] Optionally, the push ring further includes a locking ring, an annular groove is formed between the two half rings, and the locking ring is arranged in the annular groove.

[0026] Optionally, the limiting portion includes a limiting plane and a tapered surface provided on the distal end side of the limiting plane;

[0027] A second elastic arm is provided at the distal end of the limiting member, and a distal end surface of the second elastic arm can form a limiting fit with the limiting plane to axially block the first guide column from moving toward the proximal end.

[0028] Optionally, a fixing protrusion is provided on the outer periphery of the limiting member;

[0029] The handle includes a main shell and an end cover arranged at the proximal end of the main shell, the accommodating cavity is formed between the main shell and the end cover, the proximal end of the main shell is provided with a fixing groove, the fixing protrusion is arranged in the fixing groove, and the proximal side of the fixing protrusion abuts against the end cover, and the distal end of the main shell is provided with the puncture tube.

[0030] Optionally, a depth limiting mechanism is further included, and the depth limiting mechanism includes:

[0031] A position adjusting member, which is arranged at the distal end of the handle so as to be adjustable in axial direction;

[0032] The depth limiting tube is arranged on the position adjusting member and sleeved on the puncture tube.

[0033] Beneficial effects:

[0034] The suture device provided by the present invention, when multiple rigid implants are sequentially filled in the distal end of the puncture tube, the first pushing mechanism is driven to transfer from the proximal position to the distal position, and the hollow push rod can be driven by the first guide column to move toward the distal end by a distance of a limiting portion, and the hollow push rod pushes the rigid implant located at the proximal end, and the rigid implant located at the distal end is pushed out of the puncture tube through the mutual push between the rigid implants. Under the limiting cooperation of the adjacent limiting portion and the limiting member spaced apart from the proximal side of the limiting portion that forms a limited position cooperation with the first pushing mechanism, when the first pushing mechanism is transferred from the distal position to the proximal position, the first guide column remains stationary relative to the limiting member, and the first pushing mechanism moves toward the proximal end by a distance of a limiting portion and forms a limiting cooperation with the corresponding limiting portion at this time, and the rigid implant located at the distal end is suitable for the hollow push rod to push out the puncture tube, and the first pushing mechanism is repeatedly driven to reciprocate between the proximal position and the distal position, and all rigid implants can be pushed out of the puncture tube in sequence, thereby realizing the implantation of multiple rigid implants.

[0035] When multiple flexible implants are sequentially loaded into the distal end of the puncture tube, the distal end of the internal push rod extends out of the distal end of the hollow push rod and penetrates all the flexible implants, and the barbs are located in the flexible implants at the distal end. The first pushing mechanism is driven to transfer from the proximal position to the distal position, and the internal push rod moves toward the distal end by a distance of a limit portion, and the barbs of the internal push rod push the flexible implant at the distal end out of the puncture tube; and the first pushing mechanism drives the hollow push rod to move toward the distal end by a distance of a limit portion through the first guide column, and the hollow push rod pushes the flexible implant at the proximal end, and through the mutual push between the flexible implants, all the flexible implants move toward the distal end by a distance of a limit portion. Under the limiting cooperation of the adjacent limiting portion spaced one from the proximal side of the limiting portion that forms a limiting cooperation with the first pushing mechanism and the limiting piece, when the first pushing mechanism is transferred from the distal position to the proximal position, the first guide column remains stationary relative to the limiting piece, and the first pushing mechanism drives the internal push rod to reset, and the barb is retracted into the flexible implant located at the distal end at this time, and the first pushing mechanism is repeatedly driven to reciprocate between the proximal position and the distal position, so that all the flexible implants can be pushed out of the puncture tube in turn, thereby realizing the implantation of multiple flexible implants. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a structural cross-sectional view of the stapler provided by the present invention;

[0037] Figure 2 It is a structural schematic diagram of the stapler provided by the present invention;

[0038] Figure 3 is an enlarged schematic diagram of the distal end structure of the internal push rod provided by the present invention;

[0039] Figure 4 It is a schematic diagram of the structure of the stapler provided by the present invention in the accommodating cavity;

[0040] Figure 5 is a schematic structural diagram of a first guide column provided by the present invention;

[0041] Figure 6 It is a structural schematic diagram of the guide member provided by the present invention;

[0042] Figure 7 It is a structural schematic diagram of the position limiting member provided by the present invention;

[0043] Figure 8 is a structural cross-sectional view of the main shell provided by the present invention;

[0044] Fig. 9 It is a partial structural schematic diagram of the stapler provided by the present invention;

[0045] Fig.10 It is a structural exploded diagram of the push ring provided by the present invention;

[0046] Fig.11 It is an enlarged schematic diagram of the structure of the suture device provided by the present invention at the position adjusting member;

[0047] Fig.12 It is a structural schematic diagram of the position adjusting member provided by the present invention.

[0048] In the figure:

[0049] 100, handle; 101, accommodating cavity; 1011, positioning groove; 102, guide channel; 103, guide groove; 1031, yielding groove; 1032, positioning groove; 110, main shell; 111, fixing groove; 120, end cover;

[0050] 200, puncture tube; 210, outer tube; 211, through hole; 220, inner tube; 221, avoidance groove;

[0051] 300, hollow putter;

[0052] 400, internal push rod; 410, barb;

[0053] 500, first pushing mechanism; 510, guide member; 5101, second through hole; 5102, recess; 511, second guide column; 5111, fixing hole; 5112, positioning boss; 512, connecting arm; 513, first buckle; 514, first elastic arm; 515, limit undercut; 520, fixing block; 521, first through hole; 522, first slot; 530, fastener;

[0054] 600, second pushing mechanism; 610, limiting member; 611, second elastic arm; 6111, distal end surface; 612, fixing protrusion; 620, first guide column; 621, limiting portion; 6211, limiting plane; 6212, conical surface; 622, third through hole;

[0055] 700, push ring; 710, half ring; 711, guide protrusion; 712, positioning pin; 713, positioning pin groove; 714, annular groove; 715, second clamping groove; 716, limiting groove; 720, locking ring; 721, second buckle; 722, limiting block;

[0056] 800, elastic parts;

[0057] 900, depth limiting mechanism; 910, position adjusting member; 911, U-shaped frame; 912, button portion; 913, positioning protrusion; 914, position limiting sleeve; 920, depth limiting tube. DETAILED DESCRIPTION

[0058] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0059] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0061] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0062] Reference Figures 1 to 5 As shown, this embodiment provides a stapler, which includes a handle 100 , a puncture tube 200 , a hollow push rod 300 , an internal push rod 400 , a first pushing mechanism 500 and a second pushing mechanism 600 .

[0063] Specifically, the handle 100 includes a receiving cavity 101; the puncture tube 200 is disposed at the distal end of the handle 100 and is connected to the receiving cavity 101, and the distal end of the puncture tube 200 can accommodate multiple implants (not shown); the hollow push rod 300 is inserted into the puncture tube 200, and the proximal end of the hollow push rod 300 extends into the receiving cavity 101; the internal push rod 400 is inserted into the hollow push rod 300, and the proximal end of the internal push rod 400 extends out of the proximal end of the hollow push rod 300, the distal end of the internal push rod 400 can extend out of the distal end of the hollow push rod 300, and the distal end of the internal push rod 400 is provided with a barb 410. It can be understood that the multiple implants are arranged in sequence along the axial direction of the puncture tube 200.

[0064] Specifically, the first pushing mechanism 500 is arranged in the accommodating cavity 101 and is connected to the proximal end of the internal push rod 400. The first pushing mechanism 500 moves axially relative to the handle 100 and has a proximal position and a distal position; the second pushing mechanism 600 includes a limit member 610 and a first guide column 620. The limit member 610 is fixed in the accommodating cavity 101. The first guide column 620 is fixedly connected to the proximal end of the hollow push rod 300. The first guide column 620 is provided with a plurality of limit portions 621 side by side along the axial direction.

[0065] Specifically, at the proximal position, a limiting fit is formed between the first pushing mechanism 500 and one of the limiting portions 621 to block the first guide column 620 from moving toward the proximal end in the axial direction; the limiting portion 621 adjacent to the proximal side of the limiting portion 621 that forms a limiting fit with the first pushing mechanism 500 forms a limiting fit with the limiting member 610 to block the first guide column 620 from moving toward the proximal end in the axial direction;

[0066] Specifically, at the distal position, a limiting fit is formed between the first pushing mechanism 500 and one of the limiting portions 621, which axially blocks the first guide column 620 from moving toward the proximal end; an adjacent limiting portion 621 spaced apart from one on the proximal side of the limiting portion 621 that forms a limited fit with the first pushing mechanism 500 forms a limiting fit with the limiting member 610, which axially blocks the first guide column 620 from moving toward the proximal end, or the first guide column 620 disengages from the limiting member 610.

[0067] It is understandable that each time the first pushing mechanism 500 reciprocates between the proximal position and the distal position, the first guide post 620 moves toward the distal end by a distance of the limiting portion 621 .

[0068] It can be understood that the distal end refers to the end that faces or extends into the patient's tissue to be sutured during surgery, and the proximal end refers to the end opposite to the distal end along the axial direction of the stapler.

[0069] It can be understood that when the proximal limiting portion 621 and the limiting member 610 form a limiting fit that axially blocks the first guide column 620 from moving toward the proximal end, the first pushing mechanism 500 is driven to transfer from the proximal position to the distal position, and the first guide column 620 disengages from the limiting member 610; when the first pushing mechanism 500 is driven to transfer from the distal position to the proximal position, the proximal limiting portion 621 again forms a limiting fit with the limiting member 610 that axially blocks the first guide column 620 from moving toward the proximal end.

[0070] When multiple rigid implants are sequentially loaded into the distal end of the puncture tube 200, the first pushing mechanism 500 is driven to transfer from the proximal position to the distal position, and the hollow push rod 300 can be driven by the first guide column 620 to move toward the distal end by a distance of a limit portion 621. The hollow push rod 300 pushes the rigid implant located at the proximal end, and the rigid implant located at the distal end is pushed out of the puncture tube 200 through the mutual resistance between the rigid implants. Under the limiting cooperation of the adjacent limiting portion 621 spaced one from the proximal side of the limiting portion 621 that forms a limiting cooperation with the first pushing mechanism 500 and the limiting member 610, when the first pushing mechanism 500 is transferred from the distal position to the proximal position, the first guide column 620 remains stationary relative to the limiting member 610, and the first pushing mechanism 500 moves toward the proximal end by a distance of a limiting portion 621 and forms a limiting cooperation with the corresponding limiting portion 621 at this time. At this time, the rigid implant located at the distal end is suitable for the hollow push rod 300 to push out the puncture tube 200. Repeatedly driving the first pushing mechanism 500 to reciprocate between the proximal position and the distal position can push all the rigid implants out of the puncture tube 200 in turn, thereby realizing the implantation of multiple rigid implants.

[0071] When multiple flexible implants are sequentially loaded into the distal end of the puncture tube 200, the distal end of the internal push rod 400 extends out of the distal end of the hollow push rod 300 and penetrates all the flexible implants, and the barbs 410 are located in the flexible implants at the distal end. The first pushing mechanism 500 is driven to transfer from the proximal position to the distal position, and the internal push rod 400 moves toward the distal end by a distance of a limit portion 621, and the barbs 410 of the internal push rod 400 push the flexible implants at the distal end out of the puncture tube 200; and the first pushing mechanism 500 drives the hollow push rod 300 to move toward the distal end by a distance of a limit portion 621 through the first guide column 620, and the hollow push rod 300 pushes the flexible implants at the proximal end, and through the mutual push between the flexible implants, all the flexible implants move toward the distal end by a distance of a limit portion 621. Under the limiting cooperation of the adjacent limiting portion 621 spaced one from the proximal side of the limiting portion 621 that forms a limiting cooperation with the first pushing mechanism 500 and the limiting member 610, when the first pushing mechanism 500 is transferred from the distal position to the proximal position, the first guide column 620 remains stationary relative to the limiting member 610, and the first pushing mechanism 500 drives the internal push rod 400 to reset, and the barb 410 retracts into the flexible implant located at the distal end at this time, and repeatedly drives the first pushing mechanism 500 to reciprocate between the proximal position and the distal position, so that all the flexible implants can be pushed out of the puncture tube 200 in turn, thereby realizing the implantation of multiple flexible implants.

[0072] It is understandable that when the barbs 410 are retracted into the flexible implant, the portion of the internal push rod 400 provided with the barbs 410 can be located at the center of the distal flexible implant to ensure that the distal flexible implant can be stably pushed out of the puncture tube 200 by the internal push rod 400.

[0073] It is understandable that each time the first pushing mechanism 500 reciprocates between the proximal position and the distal position, the first guide column 620 moves distally by a distance of the limit portion 621 and pushes the distal implant out of the puncture tube 200 through the hollow push rod 300 or the internal push rod 400.

[0074] It is understandable that when multiple rigid implants are loaded into the distal end of the puncture tube 200, the internal push rod 400 can avoid the rigid implants in the axial or radial direction to prevent the internal push rod 400 from pushing the rigid implants out of the puncture tube 200. Exemplarily, the position of the internal push rod 400 relative to the first pushing mechanism 500 in the axial direction is adjustable so that the internal push rod 400 can avoid the rigid implants in the axial direction.

[0075] It is understandable that the suturing device can adjust the number of implants filled in the distal end of the puncture tube 200 by changing the number of the upper limit portions 621 of the first guide column 620, thereby improving practicality.

[0076] Exemplarily, 4-8 limiting portions 621 may be provided on the first guide column 620, and 2-6 implants may be filled in the distal end of the corresponding puncture tube 200.

[0077] In this embodiment, refer to Figure 1 , Figure 4 and Figure 6 As shown, the first pushing mechanism 500 includes a guide member 510 , and a limiting fit can be formed between the guide member 510 and the limiting member 610 to block the first guide column 620 from moving toward the proximal end along the axial direction.

[0078] Specifically, the first pushing mechanism 500 further includes a fixing block 520 and a fastener 530. The fixing block 520 is detachably connected to the guide member 510, and a first through hole 521 is provided on the fixing block 520, and the proximal end of the internal push rod 400 is penetrated through the first through hole 521; the fastener 530 is radially penetrated through the fixing block 520 and abuts against the circumference of the internal push rod 400, so as to achieve the relative fixation of the internal push rod 400 and the first pushing mechanism 500. In this embodiment, when the patient needs to implant a rigid implant, the fastener 530 can be loosened, and the internal push rod 400 can be removed from the fixing block 520, or the distal end of the internal push rod 400 can be retracted into the hollow push rod 300. In addition, the axial relative position of the internal push rod 400 relative to the first pushing mechanism 500 can be adjusted through the fastener 530, so that the internal push rod 400 can stably push the flexible implant out of the puncture tube 200.

[0079] Exemplarily, the fastener 530 may be a top screw. A plurality of fasteners 530, for example, two fasteners 530 may be provided at intervals along the axial direction of the inner push rod 400 to ensure that the fixed connection between the inner push rod 400 and the fixing block 520 is stable and reliable.

[0080] In a feasible embodiment, the guide member 510 includes a second guide column 511, the proximal end of the second guide column 511 extends to form a connecting arm 512, the proximal end of the connecting arm 512 is provided with a first clip 513, and the fixing block 520 is provided with a first slot 522. The first clip 513 is engaged with the first slot 522 to achieve fixation between the guide member 510 and the fixing block 520, thereby facilitating assembly.

[0081] Exemplarily, a plurality of, for example, two, connecting arms 512 are provided at circumferential intervals around the first guide pillar 620 , and the first slots 522 correspond one-to-one to the connecting arms 512 to ensure that the connection between the guide member 510 and the fixing block 520 is stable and reliable.

[0082] Exemplarily, the second guide column 511 is provided with a second through hole 5101 along the axial direction, and the proximal end of the hollow push rod 300 is passed through the second through hole 5101 to facilitate the positioning and assembly of the guide member 510 and the hollow push rod 300 .

[0083] Exemplarily, a proximal end of the second guide post 511 is provided with a clearance groove 5102 , and the first guide post 620 can extend into the clearance groove 5102 .

[0084] In this embodiment, refer to Figure 1 , Figure 4 , Figures 5 to 7 As shown, the limiting portion 621 may include a limiting plane 6211 and a tapered surface 6212 disposed at the distal end of the limiting plane 6211. It is understandable that the first guide column 620 may be designed as a pagoda structure, for example, the limiting portion 621 may be truncated cone-shaped.

[0085] Specifically, the first guide column 620 is provided with a third through hole 622 along the axial direction, and the proximal end of the hollow push rod 300 is passed through the third through hole 622, so as to facilitate the positioning and assembly of the first guide column 620 and the hollow push rod 300.

[0086] Specifically, the guide member 510 also includes a first elastic arm 514 disposed at the proximal end of the second guide column 511. A limit buckle 515 is disposed at the proximal end of the first elastic arm 514. The limit buckle 515 can form a limit fit with the limit plane 6211 to block the first guide column 620 from moving toward the proximal end along the axial direction. With the cooperation of the limit member 610, the first pushing mechanism 500 is driven to transfer from the proximal position to the distal position. The limit buckle 515 pushes against the limit plane 6211 of one of the limit parts 621 to move the hollow push rod 300 toward the distal end. In the process of driving the first pushing mechanism 500 to transfer from the distal position to the proximal position, the conical surface 6212 of one of the limit parts 621 is against the limit buckle 515, the first elastic arm 514 is deformed, and the limit buckle 515 After slipping off the conical surface 6212 of the limiting portion 621, the first elastic arm 514 recovers its deformation, and the limiting undercut 515 and the limiting plane 6211 of the limiting portion 621 form a limiting fit that axially blocks the first guide column 620 from moving toward the proximal end, thereby achieving the first pushing mechanism 500 to reciprocate between the proximal position and the distal position once, and the first guide column 620 drives the hollow push rod 300 to move toward the distal end by a distance of a limiting portion 621, which is stable and reliable.

[0087] Exemplarily, a plurality of, for example, two, first elastic arms 514 are provided at circumferential intervals around the first guide pillar 620 to ensure that the limiting undercut 515 and the limiting portion 621 cooperate stably and reliably, so that the first guide pillar 620 can move stably along the axial direction.

[0088] Specifically, a second elastic arm 611 is provided at the distal end of the limiting member 610, and a limiting fit is formed between the distal end surface 6111 of the second elastic arm 611 and the limiting plane 6211 to block the first guide column 620 from moving toward the proximal end in the axial direction. In the process of driving the first pushing mechanism 500 to transfer from the proximal position to the distal position, the conical surface 6212 of one of the limiting portions 621 abuts against the second elastic arm 611, and the second elastic arm 611 is deformed. After the distal end of the second elastic arm 611 slips off the conical surface 6212 of the limiting portion 621, the second elastic arm 611 recovers its deformation, and the distal end surface 6111 of the second elastic arm 611 and the limiting plane 6211 of the limiting portion 621 form a limiting fit to block the first guide column 620 from moving toward the proximal end in the axial direction. The guide column 620 moves toward the limit position of the proximal end, and the first guide column 620 drives the hollow push rod 300 to move toward the distal end by a distance of a limit portion 621, and then drives the first pushing mechanism 500 to transfer from the distal position to the proximal position. The first guide column 620 no longer moves toward the proximal end, that is, the first pushing mechanism 500 reciprocates between the proximal position and the distal position once, and the first guide column 620 drives the hollow push rod 300 to move toward the distal end by a distance of a limit portion 621, which is stable and reliable.

[0089] Exemplarily, a plurality of second elastic arms 611 , for example, two, are provided at intervals in the circumferential direction of the first guide pillar 620 , so as to enable the first guide pillar 620 to move stably in the axial direction and prevent the first guide pillar 620 from tilting.

[0090] In some embodiments, a pawl structure may be provided on the stopper 610 and the second guide post 511, and a stopper cooperation is formed with the stopper 610 to block the first guide post 620 from moving toward the proximal end in the axial direction. Of course, the guide member 510 may also form a stopper cooperation with the stopper 610 to block the first guide post 620 from moving toward the proximal end in the axial direction through other stopper structures, such as a spring pin structure, which is not limited in this application.

[0091] In this embodiment, refer to Figure 1 , Figure 7 and Figure 8 As shown, the handle 100 includes a main shell 110 and an end cover 120 covering the proximal end of the main shell 110, a receiving cavity 101 is formed between the main shell 110 and the end cover 120, and a puncture tube 200 is provided at the distal end of the main shell 110. In this embodiment, the assembled hollow push rod 300, the internal push rod 400, the first pushing mechanism 500 and the second pushing mechanism 600 can be installed in the receiving cavity 101 from the proximal end of the main shell 110, which is convenient for assembly.

[0092] Exemplarily, the main shell 110 and the end cover 120 may be connected by threaded connection to facilitate assembly.

[0093] In a feasible implementation, the puncture tube 200 and the main shell 110 are an integral injection-molded structure, which is stable and reliable, effectively preventing the puncture tube 200 and the main shell 110 from shaking, and is more suitable for puncturing the patient's tissue to be sutured. Of course, the puncture tube 200 and the main shell 110 can also be connected by snap-fit, threaded connection, adhesive connection, etc., which is not limited in this application.

[0094] In a feasible embodiment, a fixing protrusion 612 is provided on the outer periphery of the limit member 610, and a fixing groove 111 is provided at the proximal end of the main shell 110. The fixing protrusion 612 is arranged in the fixing groove 111, and the proximal side of the fixing protrusion 612 abuts against the end cover 120 to achieve the fixation of the limit member 610 relative to the handle 100, which is convenient for assembly and has a stable and reliable connection.

[0095] Exemplarily, the limiting member 610 is provided with a plurality of fixing protrusions 612 , for example, two, spaced apart along the circumferential direction, and the fixing grooves 111 correspond one to one to the fixing protrusions 612 .

[0096] In this embodiment, refer to Figure 1 , Figure 8 and Fig. 9 As shown, the puncture tube 200 includes an outer tube 210 and an inner tube 220 sleeved inside the outer tube 210. The distal end of the inner tube 220 extends out of the distal end of the outer tube 210, and the outer tube 210 can provide stable support for the inner tube 220, so that the inner tube 220 can stably puncture the patient's tissue to be sutured, and prevent the inner tube 220 from bending. The inner wall of the outer tube 210 can fit the outer wall of the inner tube 220.

[0097] Exemplarily, the outer tube 210 and the inner tube 220 may be connected by welding, which is stable and reliable.

[0098] Specifically, an avoidance groove 221 is provided at the circumference of the distal end of the inner tube 220 to facilitate placement of the implant in the inner tube 220 and to leave space for the sutures connecting the implant.

[0099] In a feasible embodiment, a through hole 211 is provided at the proximal circumference of the outer tube 210 . When the puncture tube 200 and the main shell 110 are integrally injection molded, the injection material can extend into the through hole 211 to ensure the connection strength between the puncture tube 200 and the main shell 110 .

[0100] Exemplarily, a plurality of through holes 211, for example, two through holes 211, are provided at intervals around the circumference of the outer tube 210. The through holes 211 may be in the shape of a long strip.

[0101] In this embodiment, refer to Figure 1 , Figure 2 , Figure 4 , Figure 8 and Fig.10As shown, the suture device also includes a push ring 700, which is slidably mounted on the outer periphery of the handle 100 and connected to the first pushing mechanism 500. The push ring 700 drives the first pushing mechanism 500 to reciprocate between the proximal position and the distal position, which is convenient for operation.

[0102] Specifically, the push ring 700 is connected to the guide member 510 , and the push ring 700 can drive the first pushing mechanism 500 to move axially relative to the handle 100 through the guide member 510 .

[0103] Specifically, two guide channels 102 connected to the accommodating cavity 101 are provided at intervals on the outer periphery of the handle 100, and a fixing hole 5111 is provided on the periphery of the second guide column 511; the push ring 700 includes two interconnected half rings 710, and the inner ring surfaces of the two half rings 710 are provided with guide protrusions 711, and the guide protrusions 711 are respectively passed through the guide channels 102, and the guide protrusions 711 extend into the fixing holes 5111, so that the push ring 700 can drive the first pushing mechanism 500 to reciprocate between the proximal position and the distal position.

[0104] Specifically, the guide passage 102 is provided on the periphery of the main housing 110 .

[0105] Exemplarily, the hollow push rod 300 passes between the two guide protrusions 711 to facilitate assembly.

[0106] Exemplarily, the ends of the two guide protrusions 711 may abut against each other to ensure that the connection between the push ring 700 and the guide member 510 is stable and reliable.

[0107] In a feasible implementation, a positioning pin 712 is provided at one end of the half ring 710, and a positioning pin groove 713 is provided at the other end. The positioning pin 712 of one of the two half rings 710 can be inserted into the positioning pin groove 713 of the other half ring 710 to achieve the positioning and assembly of the two half rings 710, which is convenient and reliable. Exemplarily, at least one positioning pin 712 and at least one positioning pin groove 713, such as two positioning pins 712 and two positioning pin grooves 713, can be provided on the half ring 710.

[0108] In a feasible embodiment, the push ring 700 also includes a locking ring 720. An annular groove 714 is formed between the two half rings 710. The locking ring 720 is arranged in the annular groove 714 to achieve connection between the two half rings 710, which is convenient for assembly and has a stable and reliable connection.

[0109] Exemplarily, at least one second clamping groove 715 is provided on the semi-ring 710, and at least two second buckles 721 are provided on the locking ring 720. The second clamping groove 715 corresponds to the second buckle 721 one by one, and the second buckle 721 is clamped to the second clamping groove 715 one by one to achieve the connection between the semi-ring 710 and the locking ring 720. Exemplarily, at least two limit blocks 722 are provided on the locking ring 720, and the second buckles 721 are provided on the limit blocks 722 one by one. The semi-ring 710 is provided with a limit groove 716 corresponding to the second clamping groove 715 one by one, and the limit blocks 722 are penetrated in the limit groove 716 one by one to ensure the structural strength of the push ring 700.

[0110] Of course, the two half rings 710 can also be connected by threaded connection or other connection methods, which is not limited in this application.

[0111] In a feasible embodiment, the stapler further includes an elastic member 800, which is disposed in the accommodating cavity 101 and between the handle 100 and the first pushing mechanism 500. The elastic member 800 allows the first pushing mechanism 500 to always have a tendency to move toward the proximal end, and in a natural state, the first pushing mechanism 500 can be kept in a proximal position, effectively preventing the implant from being accidentally pushed out of the puncture tube 200. In addition, the elastic member 800 can also assist the first pushing mechanism 500 in resetting to the proximal position, facilitating surgical operations.

[0112] Exemplarily, the elastic member 800 may be a spring.

[0113] Specifically, the distal end of the second guide column 511 may be provided with a positioning boss 5112, and the proximal end of the elastic member 800 is sleeved on the positioning boss 5112, which facilitates the positioning and assembly of the elastic member 800, and the connection is stable and reliable. The elastic member 800 and the positioning boss 5112 may be interference fit to prevent the elastic member 800 from being separated from the positioning boss 5112.

[0114] Specifically, a positioning groove 1011 is provided on the distal cavity wall of the accommodating cavity 101 , and the distal end of the elastic member 800 extends into the positioning groove 1011 , which facilitates the positioning and assembly of the elastic member 800 , and the connection is stable and reliable.

[0115] In this embodiment, refer to Figure 1 , Figure 2 , Fig.11 and Fig.12As shown, the stapler also includes a depth limiting mechanism 900, which includes a positioning member 910 and a depth limiting tube 920. Among them, the positioning member 910 is adjustable in position along the axial direction at the distal end of the handle 100; the depth limiting tube 920 is arranged on the positioning member 910 and is sleeved on the puncture tube 200. In this embodiment, the distal end of the puncture tube 200 extends out of the distal end of the depth limiting tube 920, and the depth limiting tube 920 limits the depth of the puncture tube 200 puncturing the patient's tissue to be sutured to prevent the puncture tube 200 from puncturing other tissues, thereby improving surgical safety. In addition, the position of the positioning member 910 along the axial direction of the handle 100 is adjustable, that is, the length of the puncture tube 200 extending out of the depth limiting tube 920 can be adjusted to improve applicability.

[0116] Specifically, the positioning member 910 includes a U-shaped frame 911, which includes two side plates arranged opposite to each other and a bottom plate, one of which is provided with a button portion 912 and a positioning protrusion 913, and a depth limiting tube 920 is provided on the bottom plate. A guide groove 103 is provided at the distal end of the handle 100, and a clearance groove 1031 connected to the guide groove 103 is provided at the distal periphery of the handle 100. A plurality of positioning grooves 1032 are provided on the groove wall of the clearance groove 1031 at intervals along the axial direction of the handle 100. The U-shaped frame 911 is slidably arranged in the guide groove 103, the button portion 912 is inserted into the clearance groove 1031, and the positioning protrusion 913 is engaged with one of the positioning grooves 1032 to prevent the positioning member 910 from moving along the axial direction of the handle 100. In this embodiment, by pressing the button portion 912, the side plate provided with the button portion 912 and the positioning protrusion 913 is deformed, the positioning protrusion 913 is disengaged from the positioning groove 1032, and the U-shaped frame 911 is slid to adjust the axial position of the adjustment member 910 along the handle 100 for easy operation.

[0117] Specifically, the guide groove 103 is provided on the main housing 110 .

[0118] Illustratively, a plurality of positioning grooves 1032 are provided on two opposite side walls of the yield groove 1031 and are spaced apart along the axial direction of the handle 100. Positioning protrusions 913 are provided on both sides of the button portion 912. The positioning protrusions 913 are engaged with one of the positioning grooves 1032 on the corresponding side to prevent the adjusting member 910 from tilting and to share the force to prevent the adjusting member 910 and the handle 100 from breaking at the positioning protrusions 913.

[0119] Exemplarily, a limiting sleeve 914 is provided on the bottom plate, the depth limiting tube 920 is sleeved on the limiting sleeve 914 , and the puncture tube 200 is passed through the limiting sleeve 914 .

[0120] Exemplarily, a button portion 912 and a positioning protrusion 913 may also be provided on the other side panel.

[0121] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A stapler, characterized in that: include: The handle (100) comprises a receiving cavity (101); A puncture tube (200) is disposed at the distal end of the handle (100) and is in communication with the accommodating cavity (101), and the distal end of the puncture tube (200) can accommodate a plurality of implants; A hollow push rod (300) is inserted into the puncture tube (200), and the proximal end of the hollow push rod (300) extends into the accommodating cavity (101); An internal push rod (400) is inserted into the hollow push rod (300), and the proximal end of the internal push rod (400) extends out of the proximal end of the hollow push rod (300), the distal end of the internal push rod (400) can extend out of the distal end of the hollow push rod (300), and a barb (410) is provided at the distal end of the internal push rod (400); a first pushing mechanism (500), disposed in the accommodating cavity (101) and connected to the proximal end of the internal push rod (400); the first pushing mechanism (500) moves axially relative to the handle (100) and has a proximal position and a distal position; the first pushing mechanism (500) comprises a guide member (510); The second pushing mechanism (600) comprises a limiting member (610) and a first guide column (620), wherein the limiting member (610) is fixed in the accommodating cavity (101), the first guide column (620) is fixedly connected to the proximal end of the hollow push rod (300), and the first guide column (620) is provided with a plurality of limiting portions (621) arranged side by side in the axial direction; wherein: The guide member (510) can form a limiting fit with the limiting member (610) to block the first guide column (620) from moving toward the proximal end along the axial direction; At the proximal position, a limiting fit is formed between the first pushing mechanism (500) and one of the limiting portions (621) for axially blocking the first guide column (620) from moving toward the proximal end; the limiting portion (621) adjacent to the proximal side of the limiting portion (621) forming a limiting fit with the first pushing mechanism (500) forms a limiting fit with the limiting member (610) for axially blocking the first guide column (620) from moving toward the proximal end; At the distal position, a limiting fit is formed between the first pushing mechanism (500) and one of the limiting portions (621) for axially blocking the first guide column (620) from moving toward the proximal end; an adjacent limiting portion (621) spaced apart from the proximal side of the limiting portion (621) that forms a limiting fit with the first pushing mechanism (500) forms a limiting fit with the limiting member (610) for axially blocking the first guide column (620) from moving toward the proximal end, or the first guide column (620) is detached from the limiting member (610).

2. The stapler according to claim 1, characterized in that: The first pushing mechanism (500) comprises: A fixing block (520) is detachably connected to the guide member (510), wherein a first through hole (521) is provided on the fixing block (520), and a proximal end of the internal push rod (400) is passed through the first through hole (521); A fastener (530) is radially penetrated through the fixing block (520) and abuts against the periphery of the internal push rod (400).

3. The stapler according to claim 2, characterized in that: The guide member (510) comprises a second guide column (511), a connecting arm (512) extending from a proximal end of the second guide column (511), a first buckle (513) being provided at a proximal end of the connecting arm (512), a first clamping groove (522) being provided on the fixing block (520), and the first clamping groove (513) being clamped with the first clamping groove (522).

4. The stapler according to claim 2, characterized in that: The limiting portion (621) comprises a limiting plane (6211) and a conical surface (6212) provided on the distal end side of the limiting plane (6211); The guide member (510) comprises a second guide column (511) and a first elastic arm (514) arranged at the proximal end of the second guide column (511); a limiting undercut (515) is provided at the proximal end of the first elastic arm (514); the limiting undercut (515) can form a limiting fit with the limiting plane (6211) to axially block the first guide column (620) from moving toward the proximal end.

5. The stapler according to claim 2, characterized in that: It also includes a push ring (700), which is slidably mounted on the outer periphery of the handle (100) and connected to the guide member (510). The push ring (700) can drive the first pushing mechanism (500) to move axially relative to the handle (100) through the guide member (510).

6. The stapler according to claim 5, characterized in that: Two guide channels (102) communicating with the accommodating cavity (101) are provided at intervals on the outer periphery of the handle (100); the guide member (510) comprises a second guide column (511); and a fixing hole (5111) is provided on the periphery of the second guide column (511); The push ring (700) comprises two interconnected half rings (710), and guide protrusions (711) are provided on the inner ring surfaces of the two half rings (710). The guide protrusions (711) are respectively arranged to penetrate the guide channels (102) and extend into the fixing holes (5111).

7. The stapler according to claim 6, characterized in that: The push ring (700) further comprises a locking ring (720), an annular groove (714) is formed between the two half rings (710), and the locking ring (720) is arranged in the annular groove (714).

8. The stapler according to claim 1, characterized in that: The limiting portion (621) comprises a limiting plane (6211) and a conical surface (6212) provided on the distal end side of the limiting plane (6211); A second elastic arm (611) is provided at the distal end of the limiting member (610), and a distal end surface (6111) of the second elastic arm (611) can form a limiting fit with the limiting plane (6211) to axially block the first guide column (620) from moving toward the proximal end.

9. The stapler according to claim 1, characterized in that: A fixing protrusion (612) is provided on the outer periphery of the limiting member (610); The handle (100) comprises a main shell (110) and an end cover (120) which is arranged at the proximal end of the main shell (110); the accommodating cavity (101) is formed between the main shell (110) and the end cover (120); a fixing groove (111) is arranged at the proximal end of the main shell (110); the fixing protrusion (612) is arranged in the fixing groove (111), and the proximal end side of the fixing protrusion (612) abuts against the end cover (120); and the puncture tube (200) is arranged at the distal end of the main shell (110).

10. The stapler according to claim 1, characterized in that: It also includes a depth limiting mechanism (900), wherein the depth limiting mechanism (900) includes: A positioning member (910) is arranged at the distal end of the handle (100) so that its position along the axial direction can be adjusted; The depth limiting tube (920) is disposed on the position adjusting member (910) and sleeved on the puncture tube (200).

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