Suture locking unit and knotter

Abstract

The invention discloses a suture locking unit and a knotter. In the suture locking unit, a rigid first extrusion arm is rotatably connected with a mounting pipe along a rotating axis perpendicular to the axial direction of the mounting pipe, so that the first extrusion arm has better structural strength, is not easy to deform, and can keep the precision after being repeatedly used; an elastic second extrusion arm is connected with the first extrusion arm at the position close to the rotating axis, and the second extrusion arm reversely crosses the rotating axis after extending by a certain distance in the direction away from the first direction, so that the second extrusion arm is prolonged, and only small elastic deformation generated by the second extrusion arm exists; the extrusion piece is arranged on the first extrusion arm, so that irreversible elastic deformation of the second extrusion arm is avoided, the second extrusion arm is helped to reset to drive the first extrusion arm to reset, the extrusion piece can be repeatedly used to effectively extrude different locking rings, and the extruded locking rings can effectively lock penetrating sutures. The problem of operation failure caused by separation of the suture from the lock ring is avoided.

Description

[0001] This application is a divisional application of the invention patent application with the application date of December 30, 2024, the application number of 202411970850.4, and the invention name of "suture locking unit, knotter and system". TECHNICAL FIELD

[0002] The present application relates to the technical field of medical devices, in particular to a suture locking unit and a knotter. BACKGROUND

[0003] For surgeries involving suturing, after completing the suturing of the tissue, the suture needs to be knotted. In the prior art, the locking ring is squeezed on the surgical suture by using the squeezing structure of the knotter, so that at least part of the inner wall of the locking ring is attached and clamped to the suture, and then the excess suture at the proximal end of the locking ring is cut off, thereby completing the surgery.

[0004] The knotter usually needs to be reused, but the existing knotter will irreversibly deform after being used once in surgery, resulting in the inability to reset. This irreversible deformation makes the knotter unable to effectively squeeze the locking ring in subsequent use, thereby causing the suture to be unable to be effectively locked, and further causing the suture to come off the locking ring, resulting in the sutured tissue not being tightly attached, and leading to the problem of surgical failure. In short, the durability and reliability of the knotter are insufficient, which limits its effectiveness in surgeries that require multiple uses. SUMMARY

[0005] The main purpose of the present application is to provide a suture locking unit and a knotter to solve the problem that the squeezing structure in the prior art irreversibly deforms, resulting in the inability to effectively squeeze the locking ring.

[0006] In one aspect, the present application provides a suture locking unit, comprising:

[0007] a mounting tube;

[0008] a squeezing member, the squeezing member is at least partially disposed in the mounting tube, the squeezing member comprises a first squeezing arm and a second squeezing arm, the first squeezing arm is rotatably connected to the mounting tube along a rotation axis perpendicular to the axial direction of the mounting tube and extends toward a first direction, the second squeezing arm is connected to the first squeezing arm near the rotation axis, and the second squeezing arm reverses beyond the rotation axis after extending a certain distance away from the first direction;

[0009] The first extrusion arm and the second extrusion arm are both rigid structures, and the first extrusion arm is rotatable along the rotation axis and close to the second extrusion arm under the action of an external force. In the process of cooperating with the first extrusion arm to extrude the locking ring to the state of clamping the suture, the part of the second extrusion arm close to the rotation axis is elastically deformed.

[0010] Further, the thickness of the first extrusion arm is greater than the thickness of the second extrusion arm, and the ratio of the thickness of the first extrusion arm to the thickness of the second extrusion arm is between 2-5;

[0011] And / or, the first extrusion arm includes a first rotating part, a first arm, and a first extrusion part, the first arm is connected between the first rotating part and the first extrusion part, and the first rotating part is connected with the mounting pipe along the rotation axis;

[0012] The second extrusion arm includes a second arm and a second extrusion part, and the second arm is connected between the second extrusion part and the end of the first rotating part away from the first arm;

[0013] Wherein, the first arm drives the first extrusion part to rotate along the rotation axis synchronously under the action of an external force, so that the first extrusion part gradually approaches the second extrusion part, and in the process of cooperating with the first extrusion part to extrude the locking ring to clamp the suture, the second arm is elastically deformed to have a driving force tending to drive the first extrusion part away from the second extrusion part.

[0014] Further, the first extrusion arm has an initial position and an extrusion position;

[0015] The suture locking unit further comprises a push-pull piece, which is at least partially arranged in the mounting pipe, for driving the first extrusion arm to move from the initial position to the extrusion position, or removing the applied force to the first extrusion arm, so that the first extrusion arm is driven by the elastic deformation of the second arm to reset from the extrusion position to the initial position;

[0016] Wherein, when the first extrusion arm is in the initial position, the first extrusion part is away from the second extrusion part, and the second arm is not elastically deformed;

[0017] When the first extrusion arm is in the extrusion position, the first extrusion part is close to the second extrusion part, and the second arm is elastically deformed;

[0018] And / or, the push-pull piece extrudes the first extrusion arm from the initial position to the extrusion position along the first direction under the limitation of the inner wall of the mounting pipe;

[0019] Alternatively, the push-pull piece is pressed against the first pressing arm in a direction opposite to the first direction to move the first pressing arm from the initial position to the pressing position under the limitation of the inner wall of the mounting pipe.

[0020] Further, an avoiding space and a wire passing space are formed between the second arm and the mounting pipe, the avoiding space is communicated with the wire passing space and is away from the second pressing part, the mounting pipe has a first wire passing hole, the second arm has a second wire passing hole, the wire passing space is communicated between the first wire passing hole and the second wire passing hole, and the suture passing through the locking ring is sequentially extended out of the mounting pipe through the second wire passing hole, the wire passing space and the first wire passing hole;

[0021] The suture locking unit further comprises a cutter, the cutter is at least partially located in the avoiding space and moves synchronously with the push-pull piece, and the push-pull piece passes the cutting edge of the cutter when moving towards the one end of the first pressing part along the first direction;

[0022] Wherein, the push-pull piece can reach a first position, a second position and a third position in sequence along the first direction, when the push-pull piece is at the first position, the first pressing arm is at the initial position, the second arm is not elastically deformed, and the cutting edge of the cutter is located in the avoiding space and is away from the wire passing space;

[0023] When the push-pull piece is at the second position, the first pressing arm is at the pressing position, the second arm is elastically deformed, and the cutting edge of the cutter is located in the avoiding space and is close to the wire passing space;

[0024] When the push-pull piece is at the third position, the first pressing arm is at the pressing position, the second arm is elastically deformed, and the cutting edge of the cutter is located in the wire passing space and cuts off the suture passing through the wire passing space;

[0025] And / or, the push-pull piece comprises a first connecting rod part, a push-pull part and a clamping part, the push-pull part and the clamping part are connected to the same end of the first connecting rod part respectively, the push-pull part is used for pressing the first pressing arm to move from the initial position to the pressing position, and the cutter is clamped with the clamping part and is limited between the clamping part and the inner wall of the mounting pipe;

[0026] Wherein, one of the cutter and the clamping part has a first boss, the other one of the cutter and the clamping part has a first clamping groove, and the first boss and the first clamping groove are clamped in a matched manner.

[0027] Further, the second arm comprises a first segment, a second segment and a third segment, the first segment extends away from the first direction and is connected between the first rotating part and the second segment, the second segment extends away from the first extrusion arm and is connected between the first segment and the third segment, and the third segment extends along the first direction and is connected between the second segment and the second extrusion part;

[0028] In the process that the first arm drives the first extrusion part to approach the second extrusion part under the action of an external force, at least one of the first segment, the second segment and the third segment elastically deforms;

[0029] Further, the first segment is connected between the first rotating part and the second segment in a wavy line type or a straight line type;

[0030] Further, the second segment is connected between the first segment and the third segment in a wavy line type, a C type, a V type or a straight line type, and the opening of the C type or V type second segment faces the first direction or is away from the first direction;

[0031] Further, the third segment is connected between the second extrusion part and the second segment in a wavy line type or a straight line type.

[0032] Further, the first extrusion part is in a tooth shape, and the second extrusion part is in a groove shape, and the extension direction of the groove-shaped second extrusion part is parallel to the rotation axis;

[0033] The mounting pipe is provided with an embedded part corresponding to the second extrusion part, and the embedded part is embeddedly connected with the second extrusion part;

[0034] Further, the first arm gradually inclines away from the second arm from the first rotating part to the first extrusion part along the first direction.

[0035] Further, the extrusion part further comprises a limiting end part, the limiting end part is connected to one end of the second extrusion part away from the second arm and covers the opening of the mounting pipe, the limiting end part is provided with a first limiting hole, the first limiting hole is used for allowing the main body part of the lock ring to pass through and limiting the flange part of the lock ring;

[0036] Further, the limiting end part is integrally formed with the second extrusion arm;

[0037] Alternatively, the limiting end part, the second extrusion arm and the first extrusion arm are integrally formed.

[0038] On the other hand, the application further provides a knotter, the knotter comprises the suture locking unit according to any one of the above.

[0039] An operation unit is connected to the end of the mounting pipe away from the pressing member, and is used to drive the first pressing arm to rotate along the rotation axis and approach the second pressing arm, so that the second pressing arm cooperates with the first pressing arm to press the locking ring to the state of clamping the suture.

[0040] Further, the operation unit comprises a handle, a second limiting hole is formed in the handle, a second clamping groove is formed in the end of the mounting pipe away from the pressing member, the mounting pipe is arranged in the handle, and the opposite groove walls of the second clamping groove along the axial direction of the mounting pipe are respectively limited by the end faces of the opposite ends of the second limiting hole, so that the mounting pipe is limited and clamped in the handle.

[0041] The operation unit further comprises a wrench, the wrench is rotatably connected to the handle, and the end of the push-pull member of the suture locking unit away from the pressing member extends out of the mounting pipe and is connected to the wrench, and the wrench is rotated relative to the handle to drive the push-pull member to press the first pressing arm or remove the pressing force on the first pressing arm.

[0042] Further, the operation unit comprises a handle, the end of the mounting pipe away from the pressing member is limited and arranged in the handle along the axial direction of the mounting pipe.

[0043] The operation unit further comprises a wrench, the wrench is rotatably connected to the handle, and the end of the push-pull member of the suture locking unit away from the pressing member extends out of the mounting pipe and is connected to the wrench, and the wrench is rotated relative to the handle to drive the push-pull member to press the first pressing arm or remove the pressing force on the first pressing arm.

[0044] Further, the wrench comprises a connecting portion, a second rotating portion, and an operation portion, the second rotating portion is rotatably connected to the handle and is located between the connecting portion and the operation portion, the connecting portion is universally connected to the ball head member, and the operation portion extends out of the handle and is driven to rotate along the second rotating portion under the action of an external force, so that the connecting portion drives the ball head member and the push-pull member to move along the axial direction of the mounting pipe.

[0045] The ball head member comprises a ball head portion and a second connecting rod portion, and the opposite ends of the second connecting rod portion are respectively connected between the ball head portion and the end of the push-pull member extending out of the mounting pipe.

[0046] The connecting part is configured with a swing groove, a limiting groove and a notch, the notch is in communication with the same side of the swing groove and the limiting groove, and is used for the ball head part to enter the limiting groove and the second connecting rod part to enter the swing groove, the swing groove is in communication with the limiting groove, and the swing groove is V-shaped away from the limiting groove.

[0047] And / or, the handle is configured with a sliding cavity, the sliding cavity is located on the movement direction of the push-pull piece away from the extrusion piece;

[0048] The knotter further comprises a limiting piece, the limiting piece is connected between the ball head piece and the end of the push-pull piece extending out of the mounting pipe, and is slidably limited in the sliding cavity along the movement direction of the push-pull piece;

[0049] Wherein, the limiting piece, the push-pull piece and the ball head piece are detachably connected;

[0050] Or, the limiting piece, the push-pull piece and the ball head piece are integrally formed;

[0051] Or, the limiting piece and the push-pull piece are integrally formed;

[0052] Or, the limiting piece and the ball head piece are integrally formed.

[0053] Further, the knotter comprises an elastic piece, the elastic piece is arranged in the handle and connected between the wrench and the handle, and is used for driving the handle to rotate to drive the push-pull piece to remove the extrusion on the first extrusion arm;

[0054] Wherein, the elastic piece drives the handle to rotate to drive the push-pull piece to remove the extrusion on the first extrusion arm through tension, and in the process that the wrench rotates relative to the handle to drive the push-pull piece to extrude the first extrusion arm, the elastic piece is stretched within the elastic deformation range;

[0055] Or, the elastic piece drives the handle to rotate to drive the push-pull piece to remove the extrusion on the first extrusion arm through pressure, and in the process that the wrench rotates relative to the handle to drive the push-pull piece to extrude the first extrusion arm, the elastic piece is extruded within the elastic deformation range.

[0056] In the suture locking unit of the present application, the first extrusion arm of the rigid structure is rotatably connected with the mounting tube along the rotation axis perpendicular to the axial direction of the mounting tube and extends in the mounting tube along the first direction, so that the first extrusion arm is limitingly connected in the mounting tube along the axial direction of the mounting tube, thereby making the first extrusion arm have better structural strength and not easy to deform, and the accuracy can be maintained during repeated use; and the second extrusion arm is connected with the first extrusion arm near the rotation axis, and the second extrusion arm reverses beyond the rotation axis after extending a certain distance away from the first direction, thereby effectively lengthening the second extrusion arm relative to the first extrusion arm, and only the second extrusion arm produces a small elastic deformation during the extrusion and rotation of the first extrusion arm, so as to avoid irreversible elastic deformation of the second extrusion arm, and the part of the second extrusion arm extending a certain distance away from the first direction can also share a certain pressure, thus helping the second extrusion arm to reset and drive the first extrusion arm to rotate away from the second extrusion arm, thereby making the extrusion member be able to be repeatedly used under the action of external force to effectively extrude different locking rings, and thus ensuring that the extruded locking ring can effectively lock the passing suture, avoiding the problem of surgical failure caused by the suture disengaging from the locking ring. BRIEF DESCRIPTION OF DRAWINGS

[0057] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0058] Figure 1 The structure schematic view of the suture locking unit in one embodiment of the present application.

[0059] Figure 2 The exploded schematic view of the suture locking unit in one embodiment of the present application.

[0060] Figure 3 The structure schematic view of the mounting tube in one embodiment of the present application.

[0061] Figure 4 The structure schematic view of the extrusion member in one embodiment of the present application.

[0062] Figure 5 -A is a sectional view of the suture locking unit in one embodiment of the present application, in which the locking ring and the suture are not shown, and the push-pull member is in the first position; Figure 5 -B is a sectional view of the suture locking unit in one embodiment of the present application, in which the locking ring and the suture are not shown, and the push-pull member is in the second position; Figure 5 -A is a sectional view of the suture locking unit in one embodiment of the present application, in which the locking ring and the suture are not shown, and the push-pull member is in the first position; Figure 5 -C is a sectional view of the suture locking unit in one embodiment of the present application, in which the locking ring and the suture are not shown, and the push-pull member is in the second position; Figure 5-B shows the locking ring and suture in the squeezed state and the push-pull element in the second position; Figure 5 -D shows the locking ring and suture in the squeezed state and the push-pull element in the third position; Figure 5 -C shows the locking ring and suture in the squeezed state and the push-pull element in the third position.

[0063] Figure 6 Overall schematic view of the knotter according to an embodiment of the application.

[0064] Figure 7 Schematic view of the structure of the first handle according to an embodiment of the application.

[0065] Figure 8 Schematic view of the structure of the second handle according to an embodiment of the application.

[0066] Figure 9 Cross-sectional view of the knotter according to an embodiment of the application, showing the push-pull element in the first position.

[0067] Figure 10 Cross-sectional view of the knotter according to an embodiment of the application, showing the push-pull element in the third position.

[0068] Figure 11 Schematic view of the structure of the first handle according to another embodiment of the application.

[0069] Figure 12 Exploded schematic view of the knotter according to an embodiment of the application.

[0070] Figure 13 Schematic view of the structure of the spanner according to an embodiment of the application.

[0071] Figure 14 Schematic view of the structure of the knotter according to an embodiment of the application, with the second handle and part of the suture locking unit hidden.

[0072] Figure 15 Another view of Figure 14

[0073] Figure 16 Overall schematic view of the knotter system according to an embodiment of the application.

[0074] Figure 17 -A is an overall schematic view of the thread hook according to an embodiment of the application; Figure 17 -B is a schematic view of the thread hook connected to the locking ring according to an embodiment of the application.

[0075] Figure 18 ​A is a schematic view of the cooperation of the line hook, the locking ring, the suture and the suture locking unit in an embodiment disclosed in the present application, wherein the threading ring is hidden; Figure 18 B is a cross-sectional schematic view of the cooperation of the line hook, the locking ring, the suture and the suture locking unit in an embodiment disclosed in the present application.

[0076] In the above drawings, the following reference signs are used:

[0077] suture locking unit 100, mounting tube 10, fitting part 11, first wire passing hole 12, second clamping groove 13, extrusion piece 20, first extrusion arm 21, first rotating part 211, first arm 212, first extrusion part 213, inclined surface 214, second extrusion arm 22, second arm 221, first section 2211, second section 2212, third section 2213, second wire passing hole 2214, second extrusion part 222, extrusion cavity 23, limiting end part 24, first limiting hole 241, rotating shaft 30, rotating axis 31, push-pull piece 40, first connecting rod part 41, push-pull part 42, clamping part 43, first boss 431, first limiting surface 432, second limiting surface 433, avoiding space 50, wire passing space 60, cutter 70, cutting edge 71, first clamping groove 72, first direction X, locking ring 2000, main body part 2100, flange part 2200, suture 3000, knotter 1000, operation unit 200, handle 210, first handle 2102, first limiting groove 2103, second handle 2104, second limiting groove 2105, sliding cavity 2106, connecting column 2107, limiting cavity 2108, wrench 220, connecting part 2210, swinging groove 2201, limiting groove 2202, notch 2203, connecting hole 2204, second rotating part 2220, operation part 2230, ball head piece 300, ball head part 310, second connecting rod part 320, limiting piece 400, elastic piece 500, fixing piece 600, rotating shaft 700, knotter system 4000, line hook 4100, hooking piece 4110, hook part 4111, pulling part 4112, threading ring 4120, wire groove 4211. DETAILED DESCRIPTION

[0078] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0079] Please refer to Figures 1-3As shown, in one aspect, the application provides a suture locking unit 100. The suture locking unit 100 comprises a mounting tube 10, a pressing member 20 and a rotating shaft 30. The pressing member 20 is at least partially arranged in the mounting tube 10 and is rotatably connected with the mounting tube 10 through the rotating shaft 30. Wherein, the pressing member 20 is used to press the locking ring 2000 under the action of external force, so that the inner wall of the pressed locking ring 2000 is adhered to lock the suture 3000 passing through the locking ring 2000, thereby realizing the fixation of the excess suture 3000 after the completion of tissue suturing, so as to avoid the part of the excess suture 3000 from returning to the tissue to be sutured, resulting in that the sutured tissue cannot be closely adhered, causing the separation of the tissue at the sutured part, and leading to the failure of the operation.

[0080] Further, the rotating shaft 30 is fixedly connected with the mounting tube 10, and the pressing member 20 is rotatably connected with the rotating shaft 30; or the rotating shaft 30 is rotatably connected with the mounting tube 10, and the pressing member 20 is fixedly connected or rotatably connected with the rotating shaft 30. Wherein, the rotating axis 31 of the rotating shaft 30 is perpendicular to the axial direction of the mounting tube 10.

[0081] Preferably, the outer wall of the mounting tube 10 can be a circular tube or an elliptical tube, so as to facilitate the suture locking unit 100 to enter and exit the patient's body. According to the needs, the outer wall of the mounting tube 10 can also be a rectangular tube or other structure convenient for entering and exiting the patient's body, which is not limited herein.

[0082] Further, please refer to Figures 4-5As shown, the extruding member 20 comprises a first extruding arm 21 and a second extruding arm 22. The first extruding arm 21 is rotatably connected with the mounting tube 10 through the rotation shaft 30 and extends towards the first direction X. The second extruding arm 22 is connected with the first extruding arm 21 near the rotation axis 31 and reversely crosses the rotation axis 31 after extending a certain distance away from the first direction X, so that the length of the second extruding arm 22 is effectively lengthened relative to the first extruding arm 21. During the extruding rotation of the first extruding arm 21, only the second extruding arm 22 produces a small elastic deformation, which effectively prevents the second extruding arm 22 from producing irreversible elastic deformation. The part of the second extruding arm 22 extending a certain distance away from the first direction X can also share a certain pressure, so that the first extruding arm 21 is more stable during extruding and resetting, thereby facilitating the resetting of the second extruding arm 22 and the rotation of the first extruding arm 21 away from the second extruding arm 22, so as to achieve the resetting of the second extruding arm 22. In turn, the extruding member 20 can be repeatedly used under the action of external force to effectively extrude different locking rings 2000, thereby ensuring that the extruded locking ring 2000 can effectively lock the passing suture 3000 and avoiding the problem of surgical failure caused by the disengagement of the suture 3000 from the locking ring 2000.

[0083] Further, the first extruding arm 21 is a rigid structure and thicker than the second extruding arm 22. The thickness ratio of the first extruding arm 21 to the second extruding arm 22 is between 2-5. For example, when the thickness of the second extruding arm 22 is 0.5 mm, the thickness of the second extruding arm 22 is between 1 mm-2.5 mm. When the thickness of the second extruding arm 22 is 0.7 mm, the thickness of the first extruding arm 21 is between 1.4 mm-3.5 mm. Therefore, the first extruding arm 21 has better structural strength and is not easy to deform, and can maintain accuracy during repeated use. In addition, it is also convenient to control the overall size of the extruding member 20, so as to facilitate the installation of the extruding member 20 into the mounting tube 10.

[0084] The second extruding arm 22 is also a rigid structure. Under the action of external force, the first extruding arm 21 can rotate along the rotation axis 31 and approach the second extruding arm 22. During the process that the second extruding arm 22 cooperates with the first extruding arm 21 to extrude the locking ring 2000 to the state of clamping the suture 3000, the part of the second extruding arm 22 near the rotation axis 31 produces elastic deformation.

[0085] Further, the first pressing arm 21 and the second pressing arm 22 form a pressing cavity 23 for accommodating the locking ring 2000. The first pressing arm 21 gradually approaches the second pressing arm 22 under the action of an external force, and presses the locking ring 2000 in the pressing cavity 23, so that the pressed locking ring 2000 clamps and locks the suture 3000 passing through.

[0086] Further, referring to Figure 4 As shown, the first pressing arm 21 includes a first rotating part 211, a first arm 212, and a first pressing part 213. The first arm 212 is connected between the first rotating part 211 and the first pressing part 213, and the first rotating part 211 is connected with the mounting pipe 10 through the rotating shaft 30 along the rotating axis 31. So that the first pressing arm 21 can rotate along the rotating axis 31 relative to the mounting pipe 10, and the pressing member 20 is limitedly mounted in the mounting pipe 10 through the rotating shaft 30.

[0087] The second pressing arm 22 includes a second arm 221 and a second pressing part 222, and the second arm 221 is connected between the second pressing part 222 and the end of the first rotating part 211 away from the first arm 212. The second pressing part 222 is spaced apart from and opposite to the first pressing part 213 to form the pressing cavity 23.

[0088] The first arm 212 drives the first pressing part 213 to rotate along the rotating axis 31 synchronously under the action of an external force, so that the first pressing part 213 gradually approaches the second pressing part 222, thereby compressing the cavity size of the pressing cavity 23, until the second pressing part 222 cooperates with the first pressing part 213 to press the locking ring 2000 to clamp the suture 3000, thereby realizing the fixation of the suture 3000 passing through the locking ring 2000.

[0089] In the process of rotating the first pressing arm 21 to make the first pressing part 213 approach the second pressing part 222 under the action of an external force, the second arm 221 elastically deforms, thereby having a driving force tending to drive the first pressing part 213 away from the second pressing part 222. In the process of gradually canceling the external force applied to the first pressing arm 21, the first pressing arm 21 gradually resets under the action of the elastic deformation force of the second pressing arm 22, so that the first pressing part 213 is away from the second pressing part 222, and the second pressing arm 22 elastically resets.

[0090] In the process of rotating the first pressing arm 21 to make the first pressing part 213 close to the second pressing part 222, only the second arm 221 is elastically deformed, so that the first pressing part 213 and the second pressing part 222 can be precisely matched to accurately press the locking ring 2000 entering the pressing cavity 23, so that the suture 3000 passing through the pressed locking ring 2000 is effectively clamped.

[0091] Further, referring to Figure 5 As shown, the first pressing arm 21 has an initial position and a pressing position. When the first pressing arm 21 is in the initial position, the first pressing arm 21 is not subjected to external force, at this time, the first pressing part 213 is away from the second pressing part 222, the cavity volume of the pressing cavity 23 is maximum, and the second arm 221 is not elastically deformed. When the first pressing arm 21 is in the pressing position, the first pressing arm 21 is rotated along the rotation axis 31 under the action of external force, at this time, the first pressing part 213 is close to the second pressing part 222, the cavity volume of the pressing cavity 23 is reduced, and the locking ring 2000 in the pressing cavity 23 is pressed to the state of effectively locking the suture 3000 passing through, and the elastic deformation of the second arm 221 reaches the maximum.

[0092] The locking ring 2000 has an initial state and a pressing state. When the locking ring 2000 is in the initial state, the suture 3000 can enter and exit the locking ring 2000 and move relative to the locking ring 2000; when the locking ring 2000 is in the pressing state, the suture 3000 passing through the locking ring 2000 is clamped by the locking ring 2000 and cannot move relative to the locking ring 2000.

[0093] Referring to Figure 2 , 5 As shown, the suture locking unit 100 further comprises a push-pull piece 40, which is at least partially arranged in the mounting pipe 10, and is used to drive the first pressing arm 21 to move from the initial position to the pressing position, or remove the force applied to the first pressing arm 21, so that the first pressing arm 21 is reset from the pressing position to the initial position under the elastic deformation of the second arm 221.

[0094] Further, when the first pressing arm 21 is in the initial position, the push-pull piece 40 does not press the first pressing arm 21, at this time, the first pressing part 213 is away from the second pressing part 222, the cavity volume of the pressing cavity 23 is maximum, the second arm 221 is not elastically deformed, and the locking ring 2000 in the initial state or the pressing state can freely enter and exit the pressing cavity 23.

[0095] When the first pressing arm 21 is in the pressing position, the push-pull piece 40 presses the first pressing arm 21, at this time, the first pressing part 213 is close to the second pressing part 222, the cavity volume of the pressing cavity 23 is reduced, the second arm 221 is elastically deformed, and the locking ring 2000 in the pressing state is clamped in the pressing cavity 23.

[0096] Further, the push-pull piece 40 is limited by the inner wall of the mounting pipe 10 and presses the first pressing arm 21 along the first direction X from the initial position to the pressing position.

[0097] The rotating shaft 30 is connected in the mounting pipe 10 and is located in the middle position of the radial section of the mounting pipe 10, so that the rotating shaft 30 is spaced from the inner wall of the corresponding mounting pipe 10 along the direction perpendicular to the rotating axis 31.

[0098] Therefore, when the first pressing arm 21 is in the initial position, the first arm 212 is close to the inner wall of the corresponding mounting pipe 10 on the side away from the first pressing part 213, and the pressing piece 20 is moved from the inner wall of the mounting pipe 10 on the side close to the first pressing arm 21 and away from the second pressing arm 22 to the first pressing arm 21 along the first direction X, so as to press the first arm 212, so that the first pressing arm 21 rotates relative to the rotating shaft 30, until the first pressing part 213 is close to the second pressing part 222, and the locking ring 2000 in the pressing cavity 23 is pressed to the pressing state.

[0099] Alternatively, the push-pull piece 40 is limited by the inner wall of the mounting pipe 10 and presses the first pressing arm 21 along the direction opposite to the first direction X from the initial position to the pressing position. So that the first pressing arm 21 rotates and drives the first pressing part 213 to gradually approach the second pressing part 222, until the second pressing part 222 cooperates with the first pressing part 213 to press the locking ring 2000 to the pressing state.

[0100] Further, when the first pressing arm 21 is in the initial position, the pressing end of the push-pull piece 40 is located on the side of the first pressing arm 21 away from the second pressing portion 222, and the pressing end is in a wedge-shaped structure, and the side of the first pressing arm 21 away from the first pressing portion 213 is gradually inclined to form a slope in the direction opposite to the first direction X. During the movement of the push-pull piece 40 in the direction opposite to the first direction X, the pressing end abuts against the slope to make the first pressing arm 21 rotate and drive the first pressing portion 213 to approach the second pressing portion 222, so as to extrude the locking ring 2000 in the pressing cavity 23 under the cooperation of the second pressing portion 222 to lock the suture 3000 passing through the locking ring 2000.

[0101] Further, referring again to Figures 4-5 As shown in the figure, the second arm 221 includes a first segment 2211, a second segment 2212 and a third segment 2213. The first segment 2211 extends away from the first direction X and is connected between the first rotating portion 211 and the second segment 2212; the second segment 2212 extends away from the first pressing arm 21 and perpendicular to the rotation axis 31 and is connected between the first segment 2211 and the third segment 2213; and the third segment 2213 extends along the first direction X and is connected between the second segment 2212 and the second pressing portion 222, so that the second arm 221 first extends away from the first direction X for a certain distance, and then reversely extends along the first direction X and is connected with the second pressing portion 222 beyond the rotation axis 31.

[0102] In the process of driving the first pressing portion 213 to approach the second pressing portion 222 by the first arm 212 under the action of an external force, at least one of the first segment 2211, the second segment 2212 and the third segment 2213 is elastically deformed. That is, in the process of extruding the first arm 212 by the push-pull piece 40 to make the first pressing arm 21 rotate along the rotation axis 31 and drive the first pressing portion 213 to approach the second pressing portion 222, the first segment 2211 can be elastically deformed, or the second segment 2212 can be elastically deformed, or the third segment 2213 can be elastically deformed, or the first segment 2211 and the second segment 2212 can be elastically deformed, or the first segment 2211 and the third segment 2213 can be elastically deformed, or the second segment 2212 and the third segment 2213 can be elastically deformed, or the first segment 2211, the second segment 2212 and the third segment 2213 can be elastically deformed.

[0103] Further, the first section 2211 is connected between the first rotating part 211 and the second section 2212 in a wavy line type or a straight line type, so as to effectively increase the length of the first section 2211 to increase the deformation amount of the elastic deformation of the first section 2211, and avoid the extension distance of the first section 2211 away from the first direction X being too long, which leads to the increase of the length of the mounting pipe 10, so as to control the overall volume of the suture locking unit 100.

[0104] The second section 2212 is connected between the first section 2211 and the third section 2213 in a wavy line type, or a C type, or a V type, or a straight line type, so as to effectively increase the length of the second section 2212 to increase the deformation amount of the elastic deformation of the second section 2212, and avoid the extension distance of the second section 2212 away from the first direction X being too long, which leads to the increase of the length of the mounting pipe 10, so as to control the overall volume of the suture locking unit 100.

[0105] The opening of the second section 2212 in the C type or the V type faces the first direction X or is away from the first direction X. Preferably, the opening of the second section 2212 in the C type or the V type faces the first direction X, so as to simplify the structure of the extrusion piece 20 and reduce the manufacturing difficulty.

[0106] The third section 2213 is connected between the second extrusion part 222 and the second section 2212 in a wavy line type or a straight line type, so as to effectively increase the length of the third section 2213 to increase the deformation amount of the elastic deformation of the third section 2213.

[0107] Further, the first extrusion part 213 is in a tooth shape, and the second extrusion part 222 is in a groove shape, so that the first extrusion part 213 and the second extrusion part 222 cooperate to extrude the locking ring 2000 in the extrusion cavity 23 into a V type, so as to shorten the overall length of the locking ring 2000, which is conducive to controlling the amount and volume of the implant such as the locking ring 2000 and the suture 3000, increasing the efficiency of wound healing of the patient, and shortening the recovery time of the patient after surgery.

[0108] Further, please refer to Figures 1-4As shown, the extending direction of the second extruding part 222 is parallel to the rotation axis 31, and the mounting pipe 10 is provided with a fitting part 11 corresponding to the second extruding part 222, and the second extruding part 222 is connected to the fitting part 11. Thus, the second extruding part 222 and the mounting pipe 10 are limited in the axial direction of the mounting pipe 10, and are fixedly connected by welding or bonding, so that the vacancy of the fitting part 11 can be filled by the outer side of the second extruding part 222, and the length of the mounting pipe 10 can be effectively controlled. Further, under the limiting action of the rotation shaft 30, the extruding part 20 and the mounting pipe 10 are stably connected, so that the second extruding part 222 is not affected by the elastic deformation of the second arm 221, and the second extruding part 222 can be kept relatively static with the mounting pipe 10, so that the first extruding part 213 can extrude the locking ring 2000 to the extruded state by approaching the second extruding part 222.

[0109] Further, referring to Figures 4-5 As shown, when the push-pull part 40 moves in the first direction X to extrude the first extruding arm 21, the side of the first arm 212 away from the second arm 221 is an inclined surface 214, which is gradually inclined upward from the first rotating part 211 to the first extruding part 213 in the first direction X, and is rotated along the rotation axis 31 under the extrusion of the push-pull part 40.

[0110] By gradually inclining the inclined surface 214 from the first rotating part 211 to the first extruding part 213 in the first direction X, the stroke of the first arm 212 in contact with and extruded by the push-pull part 40 can be effectively prolonged, and the force applied to the push-pull part 40 can be ensured to act on the first arm 212 gently, so that the first extruding arm 21 is not rotated too fast, and the force acting on the second arm 221 is not too large to cause the elastic deformation of the second arm 221, and the second arm 221 is not easily fatigued.

[0111] Further, the extruding part 20 further comprises a limiting end part 24. The limiting end part 24 is connected to the end of the second extruding part 222 away from the second arm 221, and covers the opening of the mounting pipe 10, so as to close the opening of the mounting pipe 10, and avoid scratching the tissue in the patient's body when the suture locking unit 100 enters the patient's body.

[0112] Further, referring to Figure 5As shown in FIG. 2A and FIG. 2B, the locking ring 2000 comprises a main body 2100 and a flange 2200 located at one end of the main body 2100 and protruding radially outwardly from the main body 2100.

[0113] The limiting end 24 is provided with a first limiting hole 241 for the main body 2100 of the locking ring 2000 to pass through and limit the flange 2200 of the locking ring 2000, so that the locking ring 2000 can be inserted into a designated position in the extrusion cavity 23, facilitating accurate extrusion of the locking ring 2000, so that the locking ring 2000 extruded to the extruded state can effectively lock the passing suture 3000.

[0114] Further, the limiting end 24 is integrally formed with the second extrusion arm 22, so as to reduce the number of structural parts of the suture locking unit 100, reduce assembly difficulty and assembly steps, and improve assembly efficiency and structural strength. Alternatively, the limiting end 24, the second extrusion arm 22 and the first extrusion arm 21 are integrally formed, so as to further reduce assembly difficulty and assembly steps, and improve assembly efficiency, structural strength of the extrusion member 20, and accuracy of the first extrusion part 213 and the second extrusion part 222.

[0115] Further, please refer to Figure 5 As shown in FIG. 2A and FIG. 2B, the second arm 221 and the mounting tube 10 form an avoiding space 50 and a wire passing space 60, the avoiding space 50 is communicated with the wire passing space 60 and away from the second extrusion part 222.

[0116] The mounting tube 10 has a first wire passing hole 12, the second arm 221 has a second wire passing hole 2214, the wire passing space 60 is communicated between the first wire passing hole 12 and the second wire passing hole 2214, and the suture 3000 passing through the locking ring 2000 extends out of the mounting tube 10 through the second wire passing hole 2214, the wire passing space 60 and the first wire passing hole 12 in sequence.

[0117] Please refer to Figure 2 , 5 As shown in FIG. 2A and FIG. 2B, the suture locking unit 100 further comprises a cutter 70, which is at least partially located in the avoiding space 50 and moves synchronously with the push-pull member 40, for cutting the suture 3000 located at the wire passing space 60 after the first extrusion part 213 and the second extrusion part 222 extrude the locking ring 2000 to the extruded position, thereby completing the locking and cutting of the suture 3000.

[0118] Further, the push-pull piece 40 is closer to one end of the first pressing part 213 along the first direction X to pass the cutting edge 71 of the cutter 70, so that the push-pull piece 40 presses the one end of the first arm 212 to be in front of the cutting edge 71 along the first direction X, so as to cut the excess suture 3000 after the push-pull piece 40 presses the first arm 212 to drive the first pressing part 213 to cooperate with the second pressing part 222 to release the locking ring 2000 from the pressing position.

[0119] Further, the push-pull piece 40 can reach the first position, the second position and the third position along the first direction X in sequence. Please refer to Figure 5 As shown in B, when the push-pull piece 40 is in the first position, the first pressing arm 21 is in the initial position, the locking ring 2000 in the pressing cavity 23 is in the initial state, the second arm 221 does not produce elastic deformation, and the cutting edge 71 of the cutter 70 is located in the avoiding space 50 and away from the wire passing space 60.

[0120] Please refer to Figure 5 As shown in C, when the push-pull piece 40 is in the second position, the first pressing arm 21 is in the pressing position, the locking ring 2000 in the pressing cavity 23 is in the pressing state, the second arm 221 produces elastic deformation, and the cutting edge 71 of the cutter 70 is located in the avoiding space 50 and close to the wire passing space 60.

[0121] Please refer to Figure 5 As shown in D, when the push-pull piece 40 is in the third position, the first pressing arm 21 is in the pressing position, the locking ring 2000 in the pressing cavity 23 is still in the pressing state, the second arm 221 produces elastic deformation, and the cutting edge 71 of the cutter 70 is located in the wire passing space 60 and cuts the suture 3000 passing through the wire passing space 60.

[0122] Further, please refer to Figure 2 , 5 As shown in B, the push-pull piece 40 includes a first connecting rod part 41, a push-pull part 42 and a clamping part 43. The push-pull part 42 and the clamping part 43 are connected to the same end of the first connecting rod part 41, respectively. The first connecting rod part 41 is movably limited in the mounting pipe 10 along the axial direction of the mounting pipe 10, and is used to drive the push-pull part 42 and the clamping part 43 to move synchronously under the drive of external force.

[0123] The push-pull part 42 is used to extrude the first extrusion arm 21 from the initial position to the extrusion position, so that the first extrusion part 213 is close to the second extrusion part 222 and extrudes the locking ring 2000 in the extrusion cavity 23 from the initial state to the extrusion state. The cutter 70 is clamped with the clamping part 43 and is limited between the clamping part 43 and the inner wall of the mounting pipe 10, which is used to move synchronously with the push-pull part 40 to cut the suture 3000 passing through the locking ring 2000 extruded to the extrusion state.

[0124] As shown in Figure 3 、 7 The cutter 70 and one of the clamping parts 43 have a first boss 431, and the cutter 70 and the other clamping part 43 have a first clamping groove 72, and the first boss 431 and the first clamping groove 72 are clamped in a matched manner.

[0125] Further, the clamping part 43 includes adjacent first and second limiting surfaces 432 and 433, the first limiting surface 432 is away from the push-pull part 42, and the second limiting surface 433 is towards the push-pull part 42, the first boss 431 is arranged on the first limiting surface 432, the cutter 70 has the first clamping groove 72, the first clamping groove 72 is limited and clamped with the first boss 431, and the end of the cutter 70 away from the blade 71 abuts against the second limiting surface 433, and the side close to the first boss 431 abuts against the first limiting surface 432, and the side away from the first limiting surface 432 is limited and abuts against the inner wall of the mounting pipe 10, so that the cutter 70 is limited and clamped between the clamping part 43 and the corresponding inner wall of the mounting pipe 10, and the cutter 70 is limited and clamped without the need for a fixing structure, so as to facilitate the assembly or replacement of the cutter 70.

[0126] As shown in Figure 6 On the other hand, the application also provides a knotter 1000. The knotter 1000 includes the suture locking unit 100 described above. Therefore, the knotter 1000 has all the beneficial effects of the suture locking unit 100 described in any of the embodiments described above, which will not be repeated here.

[0127] Further, the knotter 1000 further includes an operation unit 200. The operation unit 200 is fixedly connected to the end of the mounting pipe 10 away from the extrusion part 20, and is used to drive the first extrusion arm 21 to rotate along the rotation axis 31 and close to the second extrusion arm 22, so that the second extrusion arm 22 cooperates with the first extrusion arm 21 to extrude the locking ring 2000 to the extrusion state of clamping the suture 3000.

[0128] Further, in the embodiments of the present application, please refer to Figures 6-10 As shown in the figure, the operation unit 200 includes a handle 210 and a wrench 220. The handle 210 is connected with the mounting pipe 10, and the wrench 220 is connected with the first connecting rod part 41 away from the push-pull part 42, for driving the push-pull piece 40 to move between the first position, the second position and the third position under the action of external force.

[0129] The handle 210 is configured with a second limiting hole, and the mounting pipe 10 is configured with a second clamping groove 13 away from the extrusion piece 20. The mounting pipe 10 is arranged in the handle 210, and the opposite groove walls of the second clamping groove 13 along the axial direction of the mounting pipe 10 are respectively limited by the end faces of the opposite ends of the second limiting hole, so that the second clamping groove 13 is limited and connected with the second limiting hole, thereby limiting and clamping the mounting pipe 10 in the handle 210.

[0130] Further, please refer to Figures 7-8 As shown in the figure, the handle 210 includes a first handle 2102 and a second handle 2104. The first handle 2102 is configured with a first limiting groove 2103, and the second handle 2104 is configured with a second limiting groove 2105. The first handle 2102 is connected with the second handle 2104, so that the first limiting groove 2103 and the second limiting groove 2105 are configured to form the second limiting hole.

[0131] Further, the wrench 220 is rotatably connected with the handle 210. The rotation of the wrench 220 relative to the handle 210 drives the push-pull piece 40 to move between the first position, the second position and the third position, and extrudes the first extrusion arm 21 during the movement from the first position to the second position and the third position, and removes the extrusion force on the first extrusion arm 21 after moving from the second position to the first position.

[0132] Further, in the embodiments of the present application, please refer to Figure 6 、 11 As shown in the figure, the operation unit 200 includes a handle 210 and a wrench 220. The mounting pipe 10 is arranged in the handle 210 along the axial direction of the mounting pipe 10, so that the mounting pipe 10 is fixedly connected with the handle 210.

[0133] The one end of the installation pipe 10 extending into the handle 210 is threadedly connected with the fixing member 600, and the handle 210 is further provided with a limiting cavity 2108, and the fixing member 600 is arranged in the limiting cavity 2108, so that the fixing member 600 is clamped in the limiting cavity 2108 to achieve the fixed connection between the installation pipe 10 and the handle 210.

[0134] The wrench 220 is rotatably connected to the handle 210 and is connected to the one end of the push-pull member 40 extending out of the installation pipe 10 through the ball head member 300, so that the wrench 220 can adaptively keep the axial movement along the installation pipe 10 during rotation, so as to avoid the ball head member 300 and / or the part of the push-pull member 40 extending out of the installation pipe 10 needing to be deformed to move along the axial direction of the installation pipe 10 during driving the push-pull member 40 to move along the axial direction of the installation pipe 10. Therefore, the ball head member 300 and the push-pull member 40 can always keep moving along the axial direction of the installation pipe 10 through the universal connection between the ball head member 300 and the wrench 220 and the connection between the one end of the push-pull member 40 extending out of the installation pipe 10, so as to improve the smoothness of driving the push-pull member 40 to move along the axial direction of the installation pipe 10 and reduce the required driving force.

[0135] Further, please refer to Figure 13 As shown in the figure, the wrench 220 includes a connecting portion 2210, a second rotating portion 2220 and an operating portion 2230. The second rotating portion 2220 is rotatably connected to the handle 210 through a rotating shaft 700 and is located between the connecting portion 2210 and the operating portion 2230. The connecting portion 2210 is universally connected to the ball head member 300, and the operating portion 2230 extends out of the handle 210 and drives the wrench 220 to rotate along the second rotating portion 2220 under the action of an external force, so as to drive the ball head member 300 and the push-pull member 40 to move along the axial direction of the installation pipe 10.

[0136] The operating portion 2230 can be held by medical staff in cooperation with the handle 210, and the operating portion 2230 is pulled or released to make the wrench 220 rotate relative to the handle 210.

[0137] Further, please refer to Figure 12As shown, the ball head piece 300 comprises a ball head 310 and a second connecting rod 320, the opposite ends of the second connecting rod 320 are connected between the ball head 310 and the end of the push-pull piece 40 extending out of the mounting tube 10, so that the wrench 220 rotates and drives the push-pull piece 40 to move along the axial direction of the mounting tube 10.

[0138] Further, referring to Figure 13 As shown, the connecting portion 2210 is configured with a swing groove 2201, a limiting groove 2202 and a notch 2203. The notch 2203 is communicated with the same side of the swing groove 2201 and the limiting groove 2202, and is used for the ball head 310 to enter the limiting groove 2202 and the second connecting rod 320 to enter the swing groove 2201, so as to facilitate the assembly of the ball head piece 300 and the connecting portion 2210.

[0139] The swing groove 2201 is communicated with the limiting groove 2202, and the swing groove 2201 is V-shaped away from the limiting groove 2202, the ball head 310 is arranged in the limiting groove 2202, and the connecting rod passes through the swing groove 2201 and is connected with the end of the push-pull piece 40 extending out of the mounting tube 10. By setting the V-shaped swing groove 2201 and the limiting groove 2202, the ball head piece 300 always moves in the axial direction of the mounting tube 10 during the process of being driven by the push-pull piece 40 to move between the first position, the second position and the third position, so as to avoid the end of the push-pull piece 40 extending out of the mounting tube 10 and close to the wrench 220 to be deflected relative to the axial direction of the mounting tube 10 under the drive of the wrench 220, causing the push-pull piece 40 to be pressed and limited between the position extending out of the mounting tube 10 and the inner wall of the mounting tube 10, resulting in the problem that the push-pull piece 40 is not smooth when switching between the first position, the second position and the third position, and causing irreversible deformation of the mounting tube 10 and the push-pull piece 40.

[0140] Further, referring to Figures 11-12 As shown in 11, 14, the handle 210 is configured with a sliding cavity 2106, which is located in the movement direction of the push-pull piece 40 away from the pressing piece 20 and between the second limiting hole and the wrench 220.

[0141] The knotter 1000 further comprises a limiting member 400 connected between the ball head member 300 and the end of the push-pull member 40 extending out of the mounting pipe 10 and slidably limited in the sliding cavity 2106 along the movement direction of the push-pull member 40 (i.e. the axial direction of the mounting pipe 10); so that the push-pull member 40 and the ball head member 300 are connected, and the push-pull member 40 is stably kept moving along the axial direction of the mounting pipe 10 and cannot rotate relative to the central axis of the mounting pipe 10 by sliding the limiting member 400 in the sliding cavity 2106 along the axial direction of the mounting pipe 10, so that the push-pull member 40 can stably and accurately press or release the first pressing arm 21.

[0142] Further, the limiting member 400, the push-pull member 40 and the ball head member 300 are detachably connected to facilitate the assembly of the ball head member 300 and the handle 210. Alternatively, the limiting member 400, the push-pull member 40 and the ball head member 300 are integrally formed to improve the structural strength between the limiting member 400, the push-pull member 40 and the ball head member 300 and simplify the assembly steps. Alternatively, the limiting member 400 and the push-pull member 40 are integrally formed to facilitate the improvement of the structural strength between the limiting member 400 and the push-pull member 40 and facilitate the assembly of the ball head member 300 and the handle 210 and simplify the assembly steps. Alternatively, the limiting member 400 and the ball head member 300 are integrally formed to facilitate the simplification of the assembly steps.

[0143] Further, please refer to Figure 12 , 14 -15, the knotter 1000 comprises a resilient member 500. The resilient member 500 is arranged in the handle 210 and connected between the wrench 220 and the handle 210, for driving the handle 210 to rotate to drive the push-pull member 40 to remove the pressing of the first pressing arm 21.

[0144] In the embodiments of the present application, the resilient member 500 drives the handle 210 to rotate to drive the push-pull member 40 to remove the pressing of the first pressing arm 21 by tension, and in the process of rotating the wrench 220 relative to the handle 210 to drive the push-pull member 40 to press the first pressing arm 21, the resilient member 500 is stretched within the elastic deformation range. Further, the resilient member 500 can be a resilient member 500 such as a tension spring, a tension rope, a tension belt, etc. which is elastically stretched and can be reset under tension.

[0145] Further, please refer to Figures 9-11, 14-15, the wrench 220 has a connecting hole 2204 on the connecting part 2210, the handle 210 has a connecting column 2107, the elastic member 500 is connected between the connecting hole 2204 and the connecting column 2107, and in the process of rotating the wrench 220 to drive the push-pull member 40 to move from the first position to the second position or the third position, the elastic member 500 is stretched within the elastic deformation range thereof, and under the condition of removing the external force applied to the wrench 220, the elastic member 500 drives the wrench 220 to rotate reversely to make the push-pull member 40 move from the third position to the second position and then from the second position to the first position, so that the first pressing arm 21 is reset from the pressing position to the initial position.

[0146] In the embodiments of the present application, the elastic member 500 can also drive the handle 210 to rotate to drive the push-pull member 40 to remove the pressing of the first pressing arm 21, and in the process of rotating the wrench 220 relative to the handle 210 to drive the push-pull member 40 to press the first pressing arm 21, the elastic member 500 is pressed within the elastic deformation range thereof. Further, the elastic member 500 can be an elastic member 500 that is elastically pressed and can be reset after being subjected to a pressing force, such as a metal elastic sheet, a silica gel elastic sheet, a compression spring, etc.

[0147] Further, the elastic member 500 can be abutted between the connecting part 2210 and the end of the handle 210 close to the suture locking unit 100, or can be abutted between the gripping part and the end of the handle 210 away from the suture locking unit 100, and in the process of rotating the wrench 220 to drive the push-pull member 40 to move from the first position to the second position or the third position, the elastic member 500 is pressed within the elastic deformation range thereof, and under the condition of removing the external force applied to the wrench 220, the elastic member 500 drives the wrench 220 to rotate reversely to make the push-pull member 40 move from the third position to the second position and then from the second position to the first position, so that the first pressing arm 21 is reset from the pressing position to the initial position.

[0148] In another aspect, referring to Figures 16-18As shown, the present application also provides a knotter system 4000 comprising the knotter 1000 of any one of the above. Therefore, the knotter system 4000 has all the advantages of the above, which will not be repeated here. Further, the knotter system 4000 further comprises a thread hooker 4100. The thread hooker 4100 is used to cooperate with the knotter 1000 to place the locking ring 2000 in the pressing cavity 23, and to pass the suture 3000 extending out of the sutured tissue through the locking ring 2000 and out of the thread hole of the knotter 1000.

[0149] Further, the thread hooker 4100 comprises a hooking member 4110 and a threading ring 4120. The hooking member 4110 comprises a hooking portion 4111 and a pulling portion 4112 connected at one end of the hooking portion 4111. The pulling portion 4112 passes through the locking ring 2000 and is sleeved on the threading ring 4120. The threading ring 4120 is used for the suture 3000 to pass through, and after the threading ring 4120 is removed, the part of the suture 3000 passes through the pulling portion 4112.

[0150] The outer diameter of the hook portion 4111 along the extension direction of the hook portion 4111 is smaller than the hole diameter of the limiting hole and larger than the hole diameter of the locking ring 2000, so that the locking ring 2000 passing through the pulling portion 4112 is limited between the hook portion 4111 and the threading ring 4120; or the locking ring 2000 passing through the pulling portion 4112 is inserted on the hook portion 4111, so that the locking ring 2000 can be pre-positioned and connected at one end of the hook portion 4111 close to the pulling portion 4112, in order to pre-assemble the locking ring 2000 to the line catcher 4100, and sequentially pass the other end of the hook portion 4111 away from the pulling portion 4112 through the limiting hole, the extrusion cavity 23, the threading cavity and the threading hole, so that the main body portion 2100 of the locking ring 2000 is assembled to the extrusion cavity 23 and the flange portion 2200 is limited on the side of the limiting hole away from the extrusion cavity 23, thereby quickly and efficiently assembling the locking ring 2000 to the knotter 1000 through the line catcher 4100, and at the same time, the locking ring 2000 can be limited by the threading ring 4120 to prevent the locking ring 2000 from falling off, and the pulling portion 4112 can be supported by the threading ring 4120, so that the suture 3000 extending out of the tissue can first pass through the threading ring 4120, and then pass through the rope-shaped pulling portion 4112 after removing the threading ring 4120, and further pass through the locking ring 2000, the second threading hole 2214, the threading cavity and the first threading hole 12 in sequence with the pulling portion 4112 during the process of pulling the hook portion 4111 away from the knotter 1000, so that the suture 3000 passing through the pulling portion 4112 extends out of the knotter 1000, thereby realizing the threading action of the suture 3000 passing through the locking ring 2000.

[0151] Wherein, the pulling portion 4112 is a rope-shaped structure with sufficient strength and cleanliness, which is easy to bend, so as to pass through the locking ring 2000 and be sleeved on the threading ring 4120, and to remove the threading ring 4120 and pass through the locking ring 2000, the second threading hole 2214, the threading cavity and the first threading hole 12 in sequence.

[0152] Further, please refer to Figures 17-18 As shown in the figure, the outer wall of the threading ring 4120 has a wire groove 4211, and the pulling portion 4112 is located in the wire groove 4211, so that the pulling portion 4112 can be stably sleeved on the threading ring 4120.

[0153] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A stitch locking unit, characterized in that, include: Installation pipe; An extrusion member, at least partially disposed within the mounting tube, the extrusion member comprising a first extrusion arm and a second extrusion arm, the first extrusion arm being rotatably connected to the mounting tube along a rotation axis perpendicular to the axial direction of the mounting tube and extending in a first direction, the second extrusion arm being connected to the first extrusion arm near the rotation axis, and the second extrusion arm extending a certain distance away from the first direction and then crossing the rotation axis in the opposite direction. Both the first extrusion arm and the second extrusion arm are rigid structures. Under the action of external force, the first extrusion arm can rotate along the rotation axis and approach the second extrusion arm. During the process of the second extrusion arm cooperating with the first extrusion arm to extrude the locking ring to the state of clamping the seam, the part of the second extrusion arm close to the rotation axis undergoes elastic deformation.

2. The suture locking unit according to claim 1, characterized in that, The thickness of the first extrusion arm is greater than the thickness of the second extrusion arm, and the ratio of the thickness of the first extrusion arm to the thickness of the second extrusion arm is between 2 and 5. And / or, the first extrusion arm includes a first rotating part, a first arm and a first extrusion part, the first arm is connected between the first rotating part and the first extrusion part, and the first rotating part is connected to the mounting tube along the rotation axis; The second extrusion arm includes a second arm and a second extrusion part, wherein the second arm is connected between the second extrusion part and the end of the first rotating part away from the first arm; In this process, the first arm drives the first extrusion part to rotate synchronously along the rotation axis under the drive of an external force, so that the first extrusion part gradually approaches the second extrusion part. Until the second extrusion part cooperates with the first extrusion part to squeeze the locking ring to the clamping seam, the second arm generates elastic deformation, so as to have a driving force that tends to drive the first extrusion part away from the second extrusion part.

3. The suture locking unit according to claim 2, characterized in that, The first extrusion arm has an initial position and an extrusion position; The suture locking unit further includes a push-pull member, which is at least partially disposed inside the mounting tube. The push-pull member is used to drive the first extrusion arm to move from the initial position to the extrusion position, or to remove the force applied to the first extrusion arm so that the first extrusion arm is reset from the extrusion position to the initial position under the elastic deformation drive of the second arm. Wherein, when the first extrusion arm is in the initial position, the first extrusion part is far away from the second extrusion part, and the second arm does not undergo elastic deformation; When the first extrusion arm is in the extrusion position, the first extrusion part is close to the second extrusion part, and the second arm undergoes elastic deformation. And / or, the push-pull member, limited by the inner wall of the mounting tube, presses the first extrusion arm along the first direction to move from the initial position to the extrusion position; Alternatively, the push-pull member, limited by the inner wall of the mounting tube, presses the first extrusion arm in a direction opposite to the first direction to move it from the initial position to the extrusion position.

4. The suture locking unit according to claim 3, characterized in that, A clearance space and a thread passage space are formed between the second arm and the mounting tube. The clearance space is connected to the thread passage space and is away from the second extrusion part. The mounting tube has a first thread passage hole, and the second arm has a second thread passage hole. The thread passage space is connected between the first thread passage hole and the second thread passage hole. The sewing thread passing through the locking ring extends out of the mounting tube through the second thread passage hole, the thread passage space and the first thread passage hole in sequence. The stitch locking unit further includes a cutter, which is at least partially located within the clearance space and moves synchronously with the push-pull member, and the end of the push-pull member that is close to the first compression part in the first direction passes over the blade of the cutter. Wherein, the push-pull member can reach the first position, the second position and the third position in sequence along the first direction. When the push-pull member is in the first position, the first extrusion arm is in the initial position, the second arm does not produce elastic deformation, and the blade of the cutter is located in the clearance space and away from the line space. When the push-pull member is in the second position, the first extrusion arm is in the extrusion position, the second arm undergoes elastic deformation, and the blade of the cutter is located within the clearance space and close to the line-passing space. When the push-pull member is in the third position, the first extrusion arm is in the extrusion position, the second arm undergoes elastic deformation, and the blade of the cutter is located in the thread passage space and cuts the thread passing through the thread passage space. And / or, the push-pull member includes a first connecting rod portion, a push-pull portion, and a snap-fit ​​portion, wherein the push-pull portion and the snap-fit ​​portion are respectively connected to the same end of the first connecting rod portion, the push-pull portion is used to press the first extrusion arm to move from the initial position to the extrusion position, the cutter is snapped with the snap-fit ​​portion and confined between the snap-fit ​​portion and the inner wall of the mounting tube; The cutter and one of the locking parts have a first protrusion, and the other of the cutter and the locking part have a first slot, wherein the first protrusion and the first slot are fitted together.

5. The suture locking unit according to any one of claims 2-4, characterized in that, The second arm includes a first segment, a second segment, and a third segment. The first segment extends away from the first direction and connects the first rotating part and the second segment. The second segment extends in a direction perpendicular to the axis of rotation and away from the first extrusion arm and connects the first segment and the third segment. The third segment extends in the first direction and connects the second segment and the second extrusion part. During the process where the first arm moves the first extrusion part closer to the second extrusion part under the action of external force, at least one of the first segment, the second segment and the third segment undergoes elastic deformation. And / or, the first segment is connected between the first rotating part and the second segment in a wavy or straight line shape; And / or, the second segment is connected between the first segment and the third segment in a wavy, C-shaped, V-shaped, or straight line shape, and the opening of the C-shaped or V-shaped second segment faces the first direction or is away from the first direction; And / or, the third segment is connected between the second extrusion section and the second segment in a wavy or straight line shape.

6. The suture locking unit according to any one of claims 2-4, characterized in that, The first extrusion part is toothed, and the second extrusion part is grooved, with the extension direction of the grooved second extrusion part being parallel to the rotation axis. The mounting tube has a fitting part corresponding to the second extrusion part, and the fitting part is fitted and connected to the second extrusion part. And / or, the side of the first arm opposite to the second arm gradually tilts along the first direction from the first rotating part to the first pressing part.

7. The suture locking unit according to any one of claims 2-4, characterized in that, The extrusion member further includes a limiting end, which is connected to the end of the second extrusion part away from the second arm and covers the opening of the mounting tube. The limiting end is provided with a first limiting hole, which is used for the main body of the locking ring to pass through and for limiting the flange of the locking ring. The limiting end is integrally formed with the second extrusion arm; Alternatively, the limiting end, the second extrusion arm, and the first extrusion arm are integrally formed.

8. A knotter, characterized in that, The knotter includes the suture locking unit as described in any one of claims 1-7; as well as An operating unit is connected to the end of the mounting tube away from the extruder, and is used to drive the first extrusion arm to rotate along the rotation axis and approach the second extrusion arm, so that the second extrusion arm cooperates with the first extrusion arm to extrude the locking ring to the state of clamping the seam.

9. The knotter according to claim 8, characterized in that, The operating unit includes a handle, a second limiting hole is formed inside the handle, a second slot is formed at the end of the mounting tube away from the extruder, the mounting tube passes through the handle, and the opposite slot walls of the second slot along the axial direction of the mounting tube are respectively limited to the end faces of the opposite ends of the second limiting hole, so that the mounting tube is limited and locked inside the handle. The operating unit also includes a wrench, which is rotatably connected to the handle. The end of the push-pull member of the stitch locking unit away from the extrusion member extends out of the mounting tube and is connected to the wrench. The wrench rotates relative to the handle to drive the push-pull member to extrude the first extrusion arm, or to remove the extrusion force on the first extrusion arm.

10. The knotter according to claim 8, characterized in that, The operating unit includes a handle, and one end of the mounting tube away from the extruder is inserted into the handle along the axial direction of the mounting tube. The operating unit also includes a wrench, which is rotatably connected to the handle and universally connected to one end of the push-pull member of the stitch locking unit that extends out of the mounting tube via a ball joint. The wrench rotates relative to the handle, causing the ball joint and the push-pull member to move axially along the mounting tube to squeeze the first squeezing arm or remove the squeezing force on the first squeezing arm.

11. The knotter according to claim 10, characterized in that, The wrench includes a connecting part, a second rotating part, and an operating part. The second rotating part is rotatably connected to the handle and is located between the connecting part and the operating part. The connecting part is universally connected to the ball head. The operating part extends out of the handle and, under the action of an external force, drives the wrench to rotate along the second rotating part, so that the connecting part drives the ball head and the push-pull member to move along the axial direction of the mounting tube. The ball head component includes a ball head and a second connecting rod portion, wherein the opposite ends of the second connecting rod portion are respectively connected between the ball head and one end of the push-pull component that extends out of the mounting tube; The connecting part is configured to form a swing groove, a limiting groove and a notch. The notch is connected to the same side of the swing groove and the limiting groove, and is used to allow the ball head to enter the limiting groove and the second connecting rod part to enter the swing groove. The swing groove is connected to the limiting groove, and the swing groove is V-shaped in the direction away from the limiting groove. And / or, the handle is configured to form a sliding cavity located in the direction of movement of the push-pull member away from the extrusion member; The knotter also includes a limiting member, which is connected between the ball head and the end of the push-pull member that extends out of the mounting tube, and is slidably limited within the sliding cavity along the movement direction of the push-pull member; The limiting member, the push-pull member, and the ball head member are detachably connected; Alternatively, the limiting member, the push-pull member, and the ball head member are integrally formed; Alternatively, the limiting member and the push-pull member can be integrally formed; Alternatively, the limiting member and the ball head member are integrally formed.

12. The knotter according to any one of claims 9-10, characterized in that, The knotter includes an elastic element disposed inside the handle and connected between the wrench and the handle, for driving the handle to rotate so as to drive the push-pull member to remove the compression on the first compression arm; Wherein, the elastic element drives the handle to rotate by pulling force so as to drive the push-pull member to remove the compression on the first compression arm. During the process of the wrench rotating relative to the handle and driving the push-pull member to compress the first compression arm, the elastic element is stretched within the elastic deformation range. Alternatively, the elastic element drives the handle to rotate under pressure, thereby causing the push-pull member to remove the pressure on the first compression arm. During the process of the wrench rotating relative to the handle and causing the push-pull member to compress the first compression arm, the elastic element is compressed within its elastic deformation range.

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