Fixed ring locking thread unit and locking thread cutting device

Abstract

The application discloses a fixed ring locking thread unit and a locking thread cutting device. In the fixed ring locking thread unit, the accommodating cavity and the first hole are communicated with each other, the fixed ring and the suture are placed in the accommodating cavity from the first hole, the fixed ring is accommodated and limited by the accommodating cavity, the sealing member is partially extruded into the fixed ring, the suture passing through the fixed ring is fixed between the inner wall of the fixed ring and the sealing member by the close cooperation of the sealing member and the fixed ring, the problems that the fixed ring cannot effectively clamp the suture and the suture effect is poor caused by directly extruding the fixed ring are avoided, the fixed ring is prevented from falling off from the sutured tissue position after the suture is cut, the operation failure is avoided, the fixed ring and the suture are prevented from moving together, the sutured tissue is prevented from being pulled, the suture is prevented from returning to the sutured tissue, and the tissue healing time is prolonged.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a fixed ring locking wire unit and a locking and tangent device. Background Technology

[0002] For surgeries involving suturing, after the tissue is sutured, the sutures need to be fixed and excess sutures cut off to complete the surgery.

[0003] Existing suture-locking devices typically work by clamping a retaining ring fitted onto the surgical suture, causing part of the ring's inner wall to adhere to and secure the suture. Excess suture near the retaining ring is then cut to complete the procedure. However, during the suture-locking process, the retaining ring may fail to effectively clamp the suture, resulting in incomplete suture locking, loosening of the suture, poor suture quality, and even, in severe cases, suture failure due to the retaining ring detaching from the suture site after suture cutting. Summary of the Invention

[0004] The main objective of this application is to provide a fixed ring thread-locking unit and a locking and cutting device to solve the problem in the prior art that the fixed ring cannot effectively clamp the thread after being squeezed and deformed.

[0005] On one hand, this application provides a fixed ring locking wire unit, the fixed ring locking wire unit comprising:

[0006] The main body has a receiving cavity and a first hole, the first hole communicating with the receiving cavity and for allowing a retaining ring and a suture passing through the retaining ring to enter and exit the receiving cavity; and

[0007] A sealing element, which, under the drive of an external force, at least partially enters the retaining ring to compress and confine the suture passing through the retaining ring to the inner wall of the retaining ring.

[0008] Furthermore, the sealing member includes a sealing portion and a first push-pull portion connected to each other. The sealing member has an initial state and a sealing state. When the sealing member is in the initial state, the sealing portion is located outside the fixing ring. When the sealing member is in the sealing state, the sealing portion at least partially enters the fixing ring to compress and limit the suture passing through the fixing ring to the inner wall of the fixing ring.

[0009] Furthermore, the sealing part is interference-fitted with the inner wall of the fixing ring;

[0010] When the sealing member is in the initial state, the first push-pull part passes through the fixing ring, and the sealing part is located on the outside of the fixing ring near the first hole. Under the drive of external force, the first push-pull part drives the sealing part to at least partially enter the fixing ring, so that the sealing member moves to the sealing state.

[0011] Alternatively, when the sealing member is in the initial state, the sealing member is located outside the fixing ring away from the first hole, and the first push-pull part is driven by an external force to move the sealing part toward the first hole and at least partially enter the fixing ring, so that the sealing member moves to the sealing state;

[0012] And / or, the surface of the sealing part is an anti-slip surface;

[0013] And / or, the material of the sealing part is any one of medical silicone, medical rubber, medical thermoplastic polyurethane elastomer, medical polytetrafluoroethylene, medical polycarbonate, medical polyurethane and medical polypropylene;

[0014] And / or, the first push-pull part is any one of a rope or a metal wire with a slender and flexible structure, or any one of a rigid rod or tubular structure.

[0015] Furthermore, the fixing ring locking unit also includes a pressing member, which is disposed within the receiving cavity, and the pressing member and the main body structure form a pressing cavity, the pressing cavity communicating with the first hole and used to receive the fixing ring; and

[0016] A push-pull member, which is disposed within the receiving cavity and abuts against the side of the extrusion member opposite to the extrusion cavity;

[0017] Under the drive of the push-pull member, the extrusion member extrudes the fixed ring housed in the extrusion cavity.

[0018] Furthermore, the fixing ring locking wire unit also includes a limiting member, which is disposed in the receiving cavity and spaced apart from the side of the extrusion member opposite to the extrusion cavity;

[0019] The push-pull member abuts between the extrusion member and the limiting member, and the push-pull member includes a wedge-shaped portion and a second push-pull portion connected to each other, with the wedge-shaped surface of the wedge portion facing the limiting member;

[0020] Driven by the second push-pull portion and limited by the limiting member, the wedge-shaped portion drives the extruder to move from the first position to the second position. When the extruder is in the first position, it is close to the limiting member, and the unextruded fixing ring can enter and exit the extrusion chamber through the first hole. When the extruder is in the second position, it is away from the limiting member, and the extruded fixing ring is confined within the extrusion chamber.

[0021] And / or, the fixing ring locking wire unit further includes an elastic element disposed in the receiving cavity, and under the drive of the elastic element, the pressing member also has a third position, when the pressing member is in the third position, the pressing member is close to the limiting member;

[0022] The third position is located between the first position and the second position, or the third position is the same as the first position.

[0023] Further, the main body includes a tube, the tube being configured to form the first hole; and

[0024] A support member is disposed inside the tube and defines the receiving cavity with the tube. The support member includes a support plate portion and two limiting plate portions. The two limiting plate portions are disposed opposite to each other on the support plate portion along the axial direction of the tube and form a first limiting groove with the support plate portion.

[0025] The extrusion member is disposed in the first limiting groove and defines the extrusion cavity between the support plate portion, the two limiting plate portions, and the corresponding inner wall of the tube. The push-pull member is disposed on the side of the extrusion member away from the support plate portion.

[0026] When the extruder is in the first position, the extruder is away from the support plate portion; when the extruder is in the second position, the extruder is close to the support plate portion.

[0027] Furthermore, the tube body includes an outer tube and an end plate, the end plate being disposed at one end of the outer tube and forming the first hole;

[0028] The push-pull component further includes a limiting guide portion, which is connected to the end of the second push-pull component away from the wedge-shaped portion. The limiting guide portion is disposed inside the outer tube and is adapted to the inner wall of the outer tube.

[0029] And / or, the extrusion member includes a first segment and a second segment, the first segment and the corresponding first limiting groove wall and the end plate defining the extrusion cavity, the second segment being away from the end plate, and the first end of the elastic member abutting against the second segment or being fixedly connected to the second segment;

[0030] The wedge-shaped portion abuts against the side of the first section opposite to the extrusion cavity;

[0031] And / or, the extrusion member further includes a limiting stop, which is located at the junction of the first segment and the second segment and extends toward the support plate to restrict the fixing ring from crossing the extrusion cavity.

[0032] Furthermore, the main body is also configured to have a second hole for the thread extending from the fixing ring and the first push-pull portion of the sealing member to pass through;

[0033] The support plate is configured to have a second limiting groove, which is located on the side of the extrusion chamber away from the end plate, and the second hole communicates with the bottom of the second limiting groove.

[0034] The fixing ring locking unit also includes a cutter, which is disposed in the second limiting groove. When the extruder is in the second position, the cutter moves in the second limiting groove toward the extrusion chamber and passes through the second hole to cut the thread passing through the second hole and the first push-pull part.

[0035] Furthermore, the elastic element is a metal spring sheet, and the second end of the metal spring sheet is simultaneously pressed against the opening of the second limiting groove or fixedly connected to the opening of the second limiting groove to restrict the cutter from disengaging from the second limiting groove.

[0036] And / or, the limiting guide portion has a limiting hole communicating with the second limiting groove, and one end of the cutter away from the second hole is limited within the limiting hole.

[0037] Furthermore, the first hole includes a first sub-hole and a second sub-hole. The first sub-hole can be used to allow an uncompressed retaining ring to pass through, or the first sub-hole and the second sub-hole are connected and can be used to allow an uncompressed retaining ring to pass through, while the second sub-hole can be used to allow a compressed retaining ring to pass through.

[0038] Alternatively, the first hole includes a first sub-hole and a second sub-hole. The first sub-hole can be used to allow an uncompressed retaining ring to pass through, or the first sub-hole and the second sub-hole are connected and can be used to allow an uncompressed retaining ring to pass through, while the second sub-hole can be used to allow a compressed retaining ring to pass through. The first sub-hole is one of a semi-circular hole, a semi-elliptical hole, a rectangular hole, or a trapezoidal hole, and the second sub-hole is a rectangular hole.

[0039] On the other hand, this application also provides a locking wire-cutting device, the locking wire-cutting device comprising the fixing ring locking unit described in any of the above claims; and

[0040] An operating handle and a connecting tube are provided, the connecting tube being connected between the operating handle and the main body of the fixing ring locking unit, and located at the end of the main body away from the first hole.

[0041] In the suture-locking unit of this application, by providing an interconnected receiving cavity and a first hole, and by placing the suture-threaded suture and the suture together through the first hole into the receiving cavity, the receiving cavity simultaneously accommodates and limits the suture while cleverly squeezing at least partially the sealing member into the suture. The tight fit between the sealing member and the suture secures the suture passing through the suture between the inner wall of the suture and the sealing member. This avoids problems such as the suture not being effectively clamped due to direct squeezing of the suture, resulting in poor suturing, and the suture falling off the suture after cutting, leading to surgical failure. It also prevents the suture and the clamped suture from moving away from the suture tissue due to squeezing, thus avoiding suture tearing of the suture tissue and excess suture returning to the sutured tissue, which could lead to poor tissue adhesion and increased healing time. Attached Figure Description

[0042] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0043] Figure 1 This is an overall schematic diagram of the fixed ring locking wire unit in one embodiment of this application.

[0044] Figure 2 This is an overall schematic diagram of the fixed ring locking wire unit from another perspective in one embodiment of this application.

[0045] Figure 3 for Figure 2 A sectional view along the A-A1 direction.

[0046] Figure 4 A cross-sectional diagram showing how the sealing element and the retaining ring work together to compress and fix the suture.

[0047] Figure 5 for Figure 2A cross-sectional view along the A-A1 direction shows the extruder in the first position, with the retaining ring confined and housed within the extrusion chamber, the first push-pull portion and the stitching passing through the retaining ring respectively, and the sealing portion located outside the retaining ring.

[0048] Figure 6 This is a schematic diagram of the push-pull component in one embodiment of this application.

[0049] Figure 7 for Figure 2 A cross-sectional view along the A-A1 direction, showing the extruder in the second position.

[0050] Figure 8 for Figure 2 A cross-sectional view along the A-A1 direction, showing the extruder in the third position.

[0051] Figure 9 This is a schematic diagram of the support member in one embodiment of this application.

[0052] Figure 10 This is a schematic diagram of the extrusion component in one embodiment of this application.

[0053] The above figures include the following reference numerals:

[0054] The components include: a fixing ring locking unit 100, a receiving cavity 11, a first hole 12, a first sub-hole 121, a second sub-hole 122, a tube body 13, an outer tube 131, an end plate 132, a support member 14, a support plate portion 141, a limiting plate portion 142, a first limiting groove 143, a second limiting groove 144, a second hole 16, an extrusion member 20, a first section 22, a second section 23, a first plate portion 231, a second plate portion 232, a limiting groove 233, a limiting stop portion 24, a sealing member 30, a sealing portion 31, a first push-pull portion 32, an extrusion cavity 40, an elastic member 50, a first end 51, a second end 52, a push-pull member 60, a wedge-shaped portion 61, a second push-pull portion 62, a limiting guide portion 63, a limiting hole 64, a cutter 70, a limiting member 80, a fixing ring 200, a through hole 210, and a sewing thread 300. Detailed Implementation

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0058] Please see Figure 1-5 As shown, on one hand, this application provides a fixing ring locking unit 100 for fixing a sewing thread 300 passing through a fixing ring 200 to the inner wall of the fixing ring 200.

[0059] Furthermore, the fixing ring suture unit 100 includes a main body and a sealing member 30. The main body is configured to form a receiving cavity 11 and a first hole 12. The first hole 12 communicates with the receiving cavity 11 and is used for the fixing ring 200 and the suture 300 passing through the fixing ring 200 to enter and exit the receiving cavity 11. The sealing member 30, driven by an external force, at least partially enters the fixing ring 200 to compress and limit the suture 300 passing through the fixing ring 200 to the inner wall of the fixing ring 200, thereby fixing the suture 300 passing through the fixing ring 200. This avoids the problem that directly squeezing the fixing ring 200 to clamp the suture 300 may result in the fixing ring 200 being unable to effectively clamp the suture 300, causing the suture 300 to loosen and resulting in poor suturing effect. In some cases, after cutting off excess suture 300, the suture 300 inside the fixing ring 200 may detach from the fixing ring 200 and detach from the sutured tissue, leading to surgical failure.

[0060] Furthermore, after suturing the tissue, the suture 300 needs to be fixed, and the excess portion of the fixed suture 300 and the sealing member 30 are removed to complete the entire internal suturing process. Since internal suturing is not convenient for direct knotting, compared to the prior art where the fixing ring 200 is directly squeezed to clamp and fix the suture 300 passing through it, this application simplifies the structure of the fixing ring locking unit 100 by passing the suture 300 through the fixing ring 200 and squeezing and clamping the suture 300 under the tight cooperation of the sealing member 30 and the fixing ring 200. This makes the fixing ring locking unit 100 more compact and easier to operate.

[0061] Further, please refer to Figure 5 As shown, the sealing member 30 includes a sealing portion 31 and a first push-pull portion 32 connected to each other. The first push-pull portion 32 is used to drive the sealing portion 31 into the retaining ring 200. The sealing member 30 has an initial state and a sealed state. When the sealing member 30 is in the initial state, the sealing portion 31 is located outside the retaining ring 200. When the sealing member 30 is in the sealed state, the sealing portion 31 at least partially enters the retaining ring 200 to compress and limit the suture 300 passing through the retaining ring 200 to the inner wall of the retaining ring 200.

[0062] In the embodiments of this application, when the sealing member 30 is in the initial state, the first push-pull portion 32 and the suture 300 are inserted together into the fixing ring 200, and the sealing portion 31 is located on the outer side of the fixing ring 200 near the first hole 12. At this time, both the suture 300 passing through the fixing ring 200 and the first push-pull portion 32 can move relative to the fixing ring 200. Under the drive of an external force, the first push-pull portion 32 drives the sealing portion 31 to at least partially enter the fixing ring 200, so that the sealing member 30 moves to the sealing state. At this time, the sealing portion 31 entering the fixing ring 200 will fit tightly against the corresponding inner wall of the fixing ring 200, and squeeze and limit the corresponding suture 300 within the fixing ring 200.

[0063] Furthermore, the first push-pull part 32 can be a soft and slender structure such as a rope or metal wire, or a rigid rod or tubular structure, so that the sealing part 31 can be pulled into the fixing ring 200 under the action of external force.

[0064] In the embodiments of this application, when the sealing member 30 is in the initial state, the sealing member 30 is located outside the fixing ring 200 away from the first hole 12. Driven by an external force, the first push-pull portion 32 moves the sealing member 31 towards the first hole 12 and at least partially enters the fixing ring 200, thereby moving the sealing member 30 to the sealing state. That is, the first push-pull portion 32 is a rigid rod-shaped or tubular structure used to push the sealing member 31 towards the first hole 12 into the fixing ring 200 under the action of an external force.

[0065] Furthermore, the sealing part 31 is interference-fitted with the inner wall of the fixing ring 200, so that the sealing part 31 can slightly expand the fixing ring 200 during the process of entering the fixing ring 200, thereby enabling the fixing ring 200 to cooperate with the sealing part 31 to clamp the thread 300 passing through; or the sealing part 31 can deform accordingly under the limiting action of the fixing ring 200, thereby closely fitting with the inner wall of the fixing ring 200 and clamping the thread 300 passing through the fixing ring 200.

[0066] Furthermore, the sealing part 31 can be medical silicone, medical rubber, or medical thermoplastic polyurethane elastomer (TPU) with good biocompatibility, flexibility, and durability; it can also be medical polytetrafluoroethylene (PTFE) with good biocompatibility, chemical corrosion resistance, and non-stick properties; it can also be medical polycarbonate (PC) with good toughness, strength, and cost-effectiveness; or it can be medical polyurethane (PU) with high shear strength, elasticity, durability, fatigue resistance, and high biocompatibility; or medical polypropylene (PP) with good biocompatibility, chemical stability, and ease of processing. This ensures that while the sealing part 31 works with the fixing ring 200 to squeeze and limit the suture 300 passing through the fixing ring 200, it will not cause wear to the suture 300, leading to suture breakage.

[0067] Furthermore, the surface of the sealing part 31 is an anti-slip surface, so that when the sealing part 31 is tightly fitted with the inner wall of the fixing ring 200, it can have a good anti-slip effect, which can not only prevent the sealing part 31 from sliding relative to the inner wall of the fixing ring 200, but also prevent the clamped suture 300 from sliding relative to the fixing ring 200 and the sealing part 31.

[0068] Further, please refer to Figure 2 , 5As shown in Figure 6, the fixing ring locking unit 100 further includes a pressing member 20 and a push-pull member 60. The pressing member 20 is disposed within the receiving cavity 11, and the pressing member 20 and the main body structure form a pressing cavity 40. The pressing cavity 40 communicates with the first hole 12 and is used to receive the fixing ring 200. The push-pull member 60 is disposed within the receiving cavity 11 and abuts against the side of the pressing member 20 opposite to the pressing cavity 40.

[0069] Driven by the push-pull member 60, the squeezing member 20 squeezes the fixing ring 200 housed in the squeezing chamber 40. At this time, the volume of the squeezing chamber 40 is compressed, so that the fixing ring 200 housed in the squeezing chamber 40 is squeezed. Thus, based on the squeezing and limiting of the suture 300 by the sealing member 30 and the fixing ring 200, the suture 300 is further clamped and fixed by squeezing the fixing ring 200 and the sealing part 31, and the volume of the fixing ring 200 is effectively compressed, thereby reducing the volume of the implant and improving the efficiency of wound healing.

[0070] Further, please refer to Figure 2 , 5 As shown in Figure 6, the fixing ring locking unit 100 further includes a limiting member 80. The limiting member 80 is disposed within the receiving cavity 11 and spaced apart from the side of the pressing member 20 opposite to the pressing cavity 40. The push-pull member 60 abuts between the pressing member 20 and the limiting member 80, and under the limiting action of the limiting member 80, the push-pull member 60 drives the pressing member 20 to press the fixing ring 200 located in the pressing cavity 40.

[0071] The push-pull member 60 includes a wedge-shaped portion 61 and a second push-pull portion 62 connected to each other. The wedge-shaped surface of the wedge-shaped portion 61 faces the limiting member 80. Under the action of an external force, the second push-pull portion 62 drives the wedge-shaped portion 61 to move, so that the wedge-shaped portion 61 drives the extruder 20 to compress the extrusion cavity 40 under the limitation of the limiting member 80, thereby causing the extruder 20 to extrude the fixed ring 200 located in the extrusion cavity 40.

[0072] By configuring the push-pull member 60 to have the wedge-shaped portion 61 structure that cooperates with the limiting member 80, the structure of the push-pull member 60 is simple, easy to process and manufacture, and the manufacturing difficulty is reduced.

[0073] Furthermore, please refer to Figure 5 , 7As shown, the extruder 20 has a first position and a second position. Driven by the second push-pull portion 62 and limited by the limiting member 80, the wedge-shaped portion 61 drives the extruder 20 from the first position to the second position. When the extruder 20 is in the first position, it is close to the limiting member 80. At this time, the cavity volume of the extrusion chamber 40 is at its maximum, and the unextruded retaining ring 200 can enter and exit the extrusion chamber 40 through the first hole 12. When the extruder 20 is in the second position, it is away from the limiting member 80. At this time, the cavity volume of the extrusion chamber 40 decreases, and the extruded retaining ring 200 is confined within the extrusion chamber 40 and cannot exit from the extrusion chamber 40 through the first hole 12.

[0074] Compared to existing technologies where the clamping and squeezing of the fixation ring 200 causes both the fixation ring 200 and the threaded suture 300 to move away from the first hole 12, in this application, the clamping member 20, during its movement from the first position to the second position, prevents the fixation ring 200, housed within the clamping cavity 40, from moving relative to the fixation ring locking unit 100. Therefore, this avoids the increased implantation volume and subsequent longer suture healing time caused by an increased distance between the fixation ring 200 and the suture site; it also avoids the risk of tearing the suture tissue as the fixation ring 200 moves away from it during the gradual clamping of the suture 300. Furthermore, it effectively solves the problem of excessively long implanted sutures 300 retracting into the suture tissue after cutting, resulting in poor suture adhesion and further increasing healing time.

[0075] Furthermore, under the limiting action of the limiting member 80, the wedge-shaped portion 61 directly drives the squeezing member 20 from the first position to the second position by the pushing or pulling force applied to the second push-pull portion 62, thus having the advantage of simple operation; and it has the feature of changing the direction of the force applied to the squeezing member 20, so that the push-pull member 60 can drive the squeezing member 20 from the first position to the second position with a small stroke, thereby helping to shorten the overall length of the fixing ring suture unit 100 and effectively compressing the overall volume of the fixing ring suture unit 100, thereby helping to push the fixing ring suture unit 100 into and out of the patient's body, and reducing the squeezing of the fixing ring suture unit 100 on the patient's internal tissues / organs during the operation, thereby improving the operating efficiency of medical staff and helping to shorten the operation time.

[0076] In addition, the wedge-shaped portion 61 can also enhance the force applied to the pressing member 20 by means of the limiting member 80, so as to reduce the driving force driving the push-pull member 60 to move.

[0077] Further, please refer to Figure 8 As shown, it also includes an elastic element 50, which drives the extruder 20 to move from the second position to the third position, so that the retaining ring 200, after being extruded into position, can exit the extrusion chamber 40 together with the locked seam 300. When the extruder 20 is in the third position, the extruder 20 is close to the limiting member 80.

[0078] Furthermore, the elastic member 50 is disposed in the receiving cavity 11 and is used to drive the pressing member 20 away from the support plate portion 141, so that the pressing member 20 moves from the second position to the third position, so that the fixed ring 200 that has been pressed into place can quickly exit from the first hole 12 after the stitch 300 is cut, or facilitate the pressing of the next fixed ring 200.

[0079] In the embodiments of this application, please refer to Figure 5 As shown, the elastic element 50 can have sufficient elastic driving force to drive the pressing element 20 from the second position to the third position. The third position is the same as the first position, so that the fixing ring locking unit 100 can be reused.

[0080] In the embodiments of this application, please refer to Figure 8 As shown, the elastic element 50 can also have a certain elastic driving force to drive the extrusion element 20 from the second position to the third position. The third position is between the first position and the second position, and when the extrusion element 20 is in the third position, the unextruded retaining ring 200 cannot enter the extrusion chamber 40 through the first hole 12, while the extruded retaining ring 200 can exit the extrusion chamber 40.

[0081] Furthermore, the elastic element 50 may be a spring, a metal sheet, or other elastic structure made of medical-grade material, and may drive the extrusion element 20 to reset from the second position to the first position, or move from the second position to the third position near the first position.

[0082] Furthermore, the wedge-shaped portion 61 is configured to not have a self-locking state in conjunction with the limiting member 80, so that the pressing member 20 can move quickly from the second position to the third position under the drive of the elastic member 50.

[0083] Further, please refer to Figure 1 as well as Figure 7-9 As shown, the main body includes a tube 13 and a support member 14. The tube 13 is configured to form the first hole 12. The support member 14 is disposed inside the tube 13 and defines the receiving cavity 11 with the tube 13.

[0084] Furthermore, the support member 14 includes a support plate portion 141 and two limiting plate portions 142. The two limiting plate portions 142 are disposed opposite to each other on the support plate portion 141 along the axial direction of the tube body 13, and form a first limiting groove 143 with the support plate portion 141.

[0085] The extrusion member 20 is disposed within the first limiting groove 143, and defines the extrusion cavity 40 between the support plate portion 141, the two limiting plate portions 142, and the corresponding inner wall of the tube body 13. By movably disposing the extrusion member 20 within the first limiting groove 143, the extrusion member 20 can be limited and guided by the first limiting groove 143 when moving between the first position and the second position, thereby improving the movement accuracy of the extrusion member 20 and increasing the extrusion efficiency on the fixed ring 200.

[0086] Furthermore, the push-pull member 60 is located on the side of the extrusion member 20 opposite to the support plate portion 141. When the extrusion member 20 is in the first position, it is away from the support plate portion 141. At this time, the cavity volume of the extrusion chamber 40 is at its maximum, and the unextruded retaining ring 200 can smoothly enter and exit the extrusion chamber 40 through the first hole 12. When the extrusion member 20 is in the second position, it is close to the support plate portion 141. At this time, the cavity volume of the extrusion chamber 40 is compressed, so that the retaining ring 200 housed in the extrusion chamber 40 is extruded, and the sealing portion 31 further clamps and fixes the passing stitch 300.

[0087] Further, please refer to Figure 5 , 7 As shown in Figure 8, the elastic member 50 has a first end 51 and a second end 52 opposite to each other. The first end 51 is fixedly connected to the extruder 20, and the second end 52 abuts against the support member 14; or, the first end 51 abuts against the extruder 20, and the second end 52 is fixed to the support member 14.

[0088] Furthermore, the tube body 13 includes an outer tube 131 and an end plate 132. The end plate 132 is disposed at the end of the outer tube 131 away from the elastic member 50 and is configured to form the first hole 12.

[0089] The push-pull member 60 further includes a limiting guide portion 63, which is connected to the end of the second push-pull member 62 away from the wedge-shaped portion 61. The limiting guide portion 63 is disposed inside the outer tube 131 and is adapted to the inner wall of the outer tube 131. During the process in which the second push-pull member 62 drives the wedge-shaped portion 61 to drive the extruder 20 to move from the first position to the second position, the limiting guide portion 63 is used to limit the wedge-shaped portion 61 and the second push-pull member 62 so that the push-pull member 60 can stably drive the extruder 20 to move from the first position to the second position.

[0090] Further, please refer to Figure 7 , 8 As shown in Figure 10, the extrusion member 20 includes a first segment 22 and a second segment 23. The first segment 22, the groove wall of the corresponding first limiting groove 143, and the end plate 132 define the extrusion cavity 40. Specifically, the first segment 22, the corresponding support plate portion 141, the two limiting plate portions 142, and the end plate 132 define the extrusion cavity 40. The first hole 12 communicates with the extrusion cavity 40, and when the extrusion member 20 is in the second position, the extrusion member 20 blocks at least a portion of the first hole 12.

[0091] The second segment 23 is located away from the end plate 132 and includes a first plate portion 231 and two second plate portions 232. The first plate portion 231 is disposed opposite to the support plate portion 141 and approaches the support plate portion 141 under the drive of the push-pull member 60. The two second plate portions 232 are respectively connected to the opposite sides of the first plate portion 231 and together with the end face of the first plate portion 231 and the first segment 22, form a limiting groove 233. The first end 51 of the elastic member 50 abuts against the limiting groove 233 or is fixedly connected to the second segment 23 within the limiting groove 233.

[0092] Furthermore, each of the second plate portions 232 corresponds to one of the limiting plate portions 142, and the side of each second plate portion 232 facing away from the other second plate portion 232 is in contact with the corresponding limiting plate portion 142, thereby increasing the area of ​​mutual limiting between the extrusion member 20 and the first limiting groove 143, so that the extrusion member 20 moves more stably in the first limiting groove 143 in the direction of approaching or moving away from the support plate portion 141.

[0093] Furthermore, the wedge-shaped portion 61 abuts against the side of the first segment 22 away from the extrusion chamber 40, thereby ensuring the extrusion force on the fixing ring 200 when the push-pull member 60 drives the extrusion member 20 to move toward the support plate portion 141, so as to effectively extrude the fixing ring 200 into place.

[0094] Further, please refer to Figure 7 , 8 As shown in Figure 10, the extrusion member 20 further includes a limiting stop 24, which is located at the junction of the first segment 22 and the second segment 23 and extends toward the support plate 141 to restrict the fixing ring 200 from passing through the extrusion cavity 40. Thus, with the cooperation of the limiting stop 24, the extrusion cavity 40 can also effectively restrict the fixing ring 200 from exiting in a direction away from the first hole 12.

[0095] Further, please refer to Figure 3 , 5 As shown, the main body is also configured to have a second hole 16. The second hole 16 is for the thread 300 extending from the fixing ring 200 and the first push-pull part 32 to pass through. This allows the cut excess thread 300 and the first push-pull part 32 to be removed from the second hole 16 after the thread 300 has been fixed by the fixing ring 200 and the sealing part 31.

[0096] Further, please refer to Figure 9 As shown, the support plate portion 141 is configured to form a second limiting groove 144. The second limiting groove 144 is located on the side of the extrusion chamber 40 away from the end plate 132, and the second hole 16 communicates with the bottom of the second limiting groove 144. The sewing thread 300 passing through the fixing ring 200 and the first push-pull portion 32 will sequentially pass through the second limiting groove 144 and the second hole 16 to extend out of the outer tube 131.

[0097] In the embodiments of this application, please refer to Figure 5 , 7 As shown in Figure 8, the fixing ring locking unit 100 also includes a cutter 70. The cutter 70 is disposed within the second limiting groove 144. When the extruder 20 is in the second position, the cutter 70 moves within the second limiting groove 144 toward the extrusion chamber 40 and passes through the second hole 16 to cut the thread 300 passing through the second hole 16 and the first push-pull portion 32.

[0098] Specifically, before the cutting is completed, the suture 300 extending from the second hole 16 and the first push-pull part 32 are both in a taut state. When the cutter 70 passes through the second hole 16, the cutting edge of the cutter 70 will directly cut the suture 300, thereby completing the cutting of the excess suture 300 and the first push-pull part 32.

[0099] Furthermore, in the embodiments of this application, the elastic element 50 is a metal spring sheet, and the second end 52 of the metal spring sheet is simultaneously pressed against the opening of the second limiting groove 144 or fixedly connected to the opening of the second limiting groove 144, so as to restrict the cutter 70 from disengaging from the second limiting groove 144 and prevent the cutter 70 from sliding freely in the second limiting groove 144, which would cause the suture 300 to be cut by the cutter 70 before it is clamped and fixed by the fixing ring 200, resulting in the failure of clamping and fixing the suture 300.

[0100] Further, please refer to Figure 1-3 As shown, the limiting guide portion 63 has a limiting hole 64 that communicates with the second limiting groove 144. The end of the cutter 70 away from the second hole 16 is limited in the limiting hole 64, thereby further limiting the cutter 70 so that the cutter 70 is more stably housed in the second limiting groove 144.

[0101] Furthermore, after the extruder 20 completes the extrusion of the retaining ring 200, the cutter 70 moves individually toward the extrusion chamber 40 under the drive of an external force to cut off the excess stitches 300.

[0102] Furthermore, the first hole 12 includes a first sub-hole 121 and a second sub-hole 122. The first sub-hole 121 can be used for the passage of a retaining ring 200 that has not been compressed or has been compressed, and the second sub-hole 122 can be used for the passage of a retaining ring 200 that has been compressed.

[0103] Specifically, the first sub-hole 121 and the second sub-hole 122 are interconnected, and respectively connect the compression chamber 40 to the outside. The first cross-sectional area of ​​the first sub-hole 121 is larger than the cross-sectional area of ​​the second sub-hole 122, and an uncompressed fixing ring 200 cannot enter or exit the compression chamber 40 through the second sub-hole 122, while a compressed fixing ring 200 can exit the compression chamber 40 from either the first sub-hole 121 or the second sub-hole 122.

[0104] Furthermore, the second sub-hole 122 is a rectangular or trapezoidal hole, preventing the uncompressed retaining ring 200 from entering or exiting the compression chamber 40 through the second sub-hole 122, while the compressed retaining ring 200 can directly exit the compression chamber 40 through the second sub-hole 122. The first sub-hole 121 is one of a semi-circular hole, a semi-elliptical hole, a rectangular hole, or a trapezoidal hole, and the first sub-hole 121 communicates with the second sub-hole 122 so that the uncompressed retaining ring 200 can enter the compression chamber 40 through the first sub-hole 121, or enter the compression chamber 40 through the connection between the first sub-hole 121 and the second sub-hole 122.

[0105] Therefore, by setting the first hole 12 with an irregular structure, it is possible to ensure that the retaining ring 200 smoothly enters the extrusion chamber 40 through the first sub-hole 121, while also reducing the risk of the retaining ring 200 exiting the extrusion chamber 40, thereby reducing the difficulty of operation. Furthermore, after extrusion is completed, it facilitates the exit of the extruded retaining ring 200 from the extrusion chamber 40 through either the first sub-hole 121 or the second sub-hole 122, thereby improving the efficiency of the extruded retaining ring 200 from the extrusion chamber 40.

[0106] Furthermore, the first sub-hole 121 is located on one side of the second sub-hole 122, so that after the uncompressed retaining ring 200 enters the compression chamber 40 through the first sub-hole 121, the retaining ring locking unit 100 can be deflected so that the retaining ring 200 moves to the area of ​​the compression chamber 40 corresponding to the second sub-hole 122, thereby reducing the risk of the retaining ring 200 exiting the compression chamber 40.

[0107] On the other hand, please see Figure 1-10 As shown, this application also provides a locking and cutting device. The locking and cutting device includes the aforementioned fixing ring locking unit 100. Therefore, the locking and cutting device has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0108] Furthermore, the locking and cutting device also includes an operating handle and a connecting tube. The connecting tube connects the operating handle to the main body of the fixing ring locking unit 100 and is located at the end of the main body away from the first hole 12. It is used to connect the operating handle to the fixing ring locking unit 100 so that when suturing and cutting the suture in vivo, the fixing ring locking unit 100 and part of the connecting tube can be inserted into the patient's body and operated by holding the operating handle.

[0109] Furthermore, the fixing ring locking unit 100 also includes a pulling member. The pulling member passes through the connecting tube and connects between the operating handle and the limiting guide 63. Driven by the operating handle, the pulling member pulls the push-pull member 60, driving the squeezing member 20 to move from the first position to the second position.

[0110] Specifically, the operating handle can be a trigger-type operating handle, which includes a fixed arm and a movable arm. The movable arm is rotatably hinged to the fixed arm, and the pulling member passing through the connecting tube is connected to the movable arm. By pulling the movable arm closer to the fixed arm, the push-pull member 60 is moved, thereby driving the pressing member 20 to move from the first position to the second position. By releasing the movable arm, the pressing member 20, driven by the elastic member 50, returns from the second position to the first position, or moves from the second position to the third position close to the first position.

[0111] Alternatively, the operating handle can also be a rotary operating handle, wherein the rotary operating handle may include a housing, a hand-tightening component, a lead screw, and a slider. The housing is fixedly connected to the connecting pipe away from the fixing ring locking unit 100. The slider and the lead screw are respectively disposed within the housing, and the slider is threadedly connected to the lead screw. The hand-tightening component is rotatably disposed on the housing and extends into the housing to connect with the lead screw.

[0112] In an embodiment of this application, the lead screw rotates within the housing but does not move axially along its axis of rotation, while the slider moves along its axis of rotation. The pulling member, passing through the connecting tube, is connected to the slider. Rotating the hand-tightening member causes the lead screw to rotate, thereby causing the slider to move axially along the lead screw. This movement of the slider then drives the pulling member to move the push-pull member 60 synchronously, thereby causing the pressing member 20 to move between the first position and the second position.

[0113] In this embodiment, the slider is fixedly disposed within the outer casing and remains stationary against it. The lead screw rotates under the rotation of the hand-tightening component and moves along its rotation axis. The pulling component, passing through the connecting tube, is connected to the end of the lead screw away from the hand-tightening component. By rotating the hand-tightening component, the lead screw rotates, causing it to move axially along the rotation axis. This, in turn, drives the pulling component to move the push-pull component 60, thereby causing the pressing component 20 to move between the first position and the second position.

[0114] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0115] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0116] The above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fixed ring locking wire unit, characterized in that, include: The main body has a receiving cavity and a first hole, the first hole communicating with the receiving cavity and for allowing a retaining ring and a suture passing through the retaining ring to enter and exit the receiving cavity; and A sealing component, comprising a sealing part and a first push-pull part, wherein the sealing part and the first push-pull part are integrally formed, and the first push-pull part is connected to one end of the sealing part. The sealing part is deformed and at least partially enters the fixing ring under the drive of an external force and the limiting action of the fixing ring via the first push-pull part. The sealing part is interference-fitted with the inner wall of the fixing ring and squeezes and limits the seam passing through the fixing ring to the inner wall of the fixing ring.

2. The fixing ring locking wire unit according to claim 1, characterized in that, The sealing member has an initial state and a sealed state. When the sealing member is in the initial state, the sealing portion is located outside the fixing ring. When the sealing member is in the sealed state, the sealing portion at least partially enters the fixing ring to compress and limit the suture passing through the fixing ring to the inner wall of the fixing ring.

3. The fixing ring locking wire unit according to claim 2, characterized in that, When the sealing member is in the initial state, the first push-pull part passes through the fixing ring, and the sealing part is located on the outside of the fixing ring near the first hole. Under the drive of external force, the first push-pull part drives the sealing part to at least partially enter the fixing ring, so that the sealing member moves to the sealing state. Alternatively, when the sealing member is in the initial state, the sealing member is located outside the fixing ring away from the first hole, and the first push-pull part is driven by an external force to move the sealing part toward the first hole and at least partially enter the fixing ring, so that the sealing member moves to the sealing state; And / or, the surface of the sealing part is an anti-slip surface; And / or, the material of the sealing part is any one of medical silicone, medical rubber, medical thermoplastic polyurethane elastomer, medical polytetrafluoroethylene, medical polycarbonate, medical polyurethane and medical polypropylene; And / or, the first push-pull part is any one of a rope or a metal wire with a slender and flexible structure, or any one of a rigid rod or tubular structure.

4. The fixing ring locking wire unit according to claim 1, characterized in that, The fixing ring locking unit further includes a pressing member, which is disposed within the receiving cavity, and the pressing member and the main body structure form a pressing cavity, the pressing cavity communicating with the first hole and used to receive the fixing ring; and A push-pull member, which is disposed within the receiving cavity and abuts against the side of the extrusion member opposite to the extrusion cavity; Under the drive of the push-pull member, the extrusion member extrudes the fixed ring housed in the extrusion cavity.

5. The fixing ring locking wire unit according to claim 4, characterized in that, The fixing ring locking unit also includes a limiting member, which is disposed in the receiving cavity and spaced apart from the side of the extrusion member opposite to the extrusion cavity; The push-pull member abuts between the extrusion member and the limiting member, and the push-pull member includes a wedge-shaped portion and a second push-pull portion connected to each other, with the wedge-shaped surface of the wedge portion facing the limiting member; Under the drive of the second push-pull part and the limit of the limiting member, the wedge-shaped part drives the extruder to move from the first position to the second position. When the extruder is in the first position, the extruder is close to the limiting member, and the unextruded fixing ring can enter and exit the extrusion cavity through the first hole. When the extruder is in the second position, the extruder is away from the limiting member, and the extruded fixing ring is confined within the extrusion cavity. And / or, the fixing ring locking wire unit further includes an elastic element disposed in the receiving cavity, and under the drive of the elastic element, the pressing member also has a third position, when the pressing member is in the third position, the pressing member is close to the limiting member; The third position is located between the first position and the second position, or the third position is the same as the first position.

6. The fixing ring locking wire unit according to claim 5, characterized in that, The main body includes a tube, the tube being configured to form the first hole; and A support member is disposed inside the tube and defines the receiving cavity with the tube. The support member includes a support plate portion and two limiting plate portions. The two limiting plate portions are disposed opposite to each other on the support plate portion along the axial direction of the tube and form a first limiting groove with the support plate portion. The extrusion member is disposed in the first limiting groove and defines the extrusion cavity between the support plate portion, the two limiting plate portions, and the corresponding inner wall of the tube. The push-pull member is disposed on the side of the extrusion member away from the support plate portion. When the extruder is in the first position, the extruder is away from the support plate portion; when the extruder is in the second position, the extruder is close to the support plate portion.

7. The fixing ring locking wire unit according to claim 6, characterized in that, The tube body includes an outer tube and an end plate, the end plate being disposed at one end of the outer tube and forming the first hole; The push-pull component also includes a limiting guide portion, which is connected to the end of the second push-pull component away from the wedge-shaped portion. The limiting guide portion is disposed inside the outer tube and is adapted to the inner wall of the outer tube. And / or, the extrusion member includes a first segment and a second segment, the first segment and the corresponding first limiting groove wall and the end plate defining the extrusion cavity, the second segment being away from the end plate, and the first end of the elastic member abutting against the second segment or being fixedly connected to the second segment; The wedge-shaped portion abuts against the side of the first section opposite to the extrusion cavity; And / or, the extrusion member further includes a limiting stop, which is located at the junction of the first segment and the second segment and extends toward the support plate to restrict the fixing ring from crossing the extrusion cavity.

8. The fixing ring locking wire unit according to claim 7, characterized in that, The main body is also configured to have a second hole for the thread extending from the fixing ring and the first push-pull portion of the sealing member to pass through; The support plate is configured to have a second limiting groove, which is located on the side of the extrusion chamber away from the end plate, and the second hole communicates with the bottom of the second limiting groove. The fixing ring locking unit also includes a cutter, which is disposed in the second limiting groove. When the extruder is in the second position, the cutter moves in the second limiting groove toward the extrusion chamber and passes through the second hole to cut the thread passing through the second hole and the first push-pull part.

9. The fixing ring locking wire unit according to claim 8, characterized in that, The elastic element is a metal spring sheet, and the second end of the metal spring sheet is pressed against the opening of the second limiting groove or fixedly connected to the opening of the second limiting groove to restrict the cutter from leaving the second limiting groove. And / or, the limiting guide portion has a limiting hole communicating with the second limiting groove, and one end of the cutter away from the second hole is limited within the limiting hole.

10. The fixing ring locking wire unit according to any one of claims 1-9, characterized in that, The first hole includes a first sub-hole and a second sub-hole. The first sub-hole can be used to allow an uncompressed retaining ring to pass through, or the first sub-hole and the second sub-hole can be connected to allow an uncompressed retaining ring to pass through, and the second sub-hole can be used to allow a compressed retaining ring to pass through. Alternatively, the first hole includes a first sub-hole and a second sub-hole. The first sub-hole can be used to allow an uncompressed retaining ring to pass through, or the first sub-hole and the second sub-hole are connected and can be used to allow an uncompressed retaining ring to pass through, while the second sub-hole can be used to allow a compressed retaining ring to pass through. The first sub-hole is one of a semi-circular hole, a semi-elliptical hole, a rectangular hole, or a trapezoidal hole, and the second sub-hole is a rectangular hole.

11. A locking tangent device, characterized in that, The locking and cutting device includes the fixing ring locking unit as described in any one of claims 1-10; and An operating handle and a connecting tube are provided, the connecting tube being connected between the operating handle and the main body of the fixing ring locking unit, and located at the end of the main body away from the first hole.

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