Clamping mechanism and suture line tightening device

Abstract

The invention provides a clamping mechanism and a suture line tightening device, and relates to the technical field of medical suture equipment.The clamping mechanism comprises a support detachably connected to a first surgical instrument; a first clamping arm and a second clamping arm are movably installed on the support, and a clamping area is formed between the first clamping arm and the second clamping arm. The outer tube of the thread locking and cutting mechanism can be clamped in the clamping area between the first clamping arm and the second clamping arm, so that the thread locking and cutting mechanism is kept stable relative to the first surgical instrument, deviation of the thread locking and cutting mechanism in the suture line tightening process is avoided, and a surgeon can operate with one hand to achieve thread collecting and locking and cutting.

Description

Technical Field

[0001] The invention relates to the technical field of medical suturing equipment, and in particular to a clamping mechanism and a suture thread tightening device. Background Art

[0002] See attached Fig. 9 In the prior art, the tightening wheel 600 is installed on the operating handle of the thread-locking mechanism 800. When the hand tightening wheel 600 is rotated to tighten the suture 700, the tension of the suture 700 will force the flexible thread-locking mechanism 800 to bend, thereby shortening the distance between the tightening wheel 600 and the clamp opening of the endoscope handle, making it difficult to control the take-up length of the suture 700. In addition, when two single anchor mechanisms are used for tissue suturing, the two sutures are tightened by the same take-up wheel, so it is impossible to adjust the tightness of a single suture, and it is difficult to ensure that the locking position of the two sutures is in the center of the suture site, which may cause technical problems such as the suture site being skewed. When operating the suture to tighten and lock the suture, it is necessary to ensure that the thread-locking mechanism 800 remains stable relative to the endoscope handle, otherwise it will affect the tension of the suture. Moreover, when operating, the surgeon needs to hold the endoscope handle on the one hand, and perform operations such as reeling in and locking the cut on the other hand. Since the endoscope handle in the prior art cannot fix other instruments, not only does it require external manual assistance, but multiple people operating in one place are prone to mutual interference, which in turn affects the accuracy of the surgical operation. Summary of the invention

[0003] The object of the present invention is to provide a clamping mechanism and a suture tightening device to alleviate the technical problems that the suture winding length is difficult to control and the tightening state of two sutures cannot be adjusted separately.

[0004] In a first aspect, the clamping mechanism provided by the present invention includes a bracket detachably connected to a first surgical instrument;

[0005] A first clamping arm and a second clamping arm are movably mounted on the bracket, and a clamping area is formed between the first clamping arm and the second clamping arm.

[0006] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein one end of the first clamp arm and one end of the second clamp arm are respectively hinged to the bracket, and the other end of the first clamp arm is opposite to the other end of the second clamp arm to form the clamping area.

[0007] In combination with the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the bracket is elastic, and the bracket squeezes the first clamp arm and the second clamp arm, and makes the first clamp arm and the second clamp arm tend to form an angle.

[0008] In combination with the first possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein an opening is formed on one side of the clamping area;

[0009] The clamped portion of the second surgical instrument enters the clamping area through the opening along the first direction, and pushes the first clamp arm and the second clamp arm to switch to a locked state synchronously, so that the opening is reduced or closed;

[0010] When the clamped portion, the first clamping arm or the second clamping arm is operated in the reverse direction of the first direction, the first clamping arm and the second clamping arm are synchronously switched to the unlocked state, so that the clamped portion is removed through the opening.

[0011] In combination with the third possible implementation manner of the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the first clamping arm is provided with a first limiting groove, the second clamping arm is provided with a second limiting groove opposite to the first limiting groove, and the clamping area is formed between the first limiting groove and the second limiting groove;

[0012] In the locked state, the bracket squeezes the first clamp arm and the second clamp arm to deflect toward the first direction, and the clamped portion of the second surgical instrument is clamped between the first limiting groove and the second limiting groove;

[0013] In the unlocked state, the bracket squeezes the first clamping arm and the second clamping arm to deflect toward a second direction, so as to expand the opening of the clamping area between the first limiting groove and the second limiting groove.

[0014] In combination with the third possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein the bracket is provided with a locking and limiting structure, or the first clamping arm and / or the second clamping arm is provided with a locking and limiting structure;

[0015] The locking and limiting structure is used to prevent the first clamp arm and the second clamp arm from continuing to deflect toward the first direction in a locked state.

[0016] In combination with the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the first clamping arm is provided with a first tooth portion, the second clamping arm is provided with a second tooth portion adapted to the first tooth portion, the first tooth portion cooperates with the second tooth portion, and the clamping area is formed between the first tooth portion and the second tooth portion.

[0017] In combination with the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the bracket is also provided with a cross beam, and the cross beam is provided with a clearance groove, and the clearance groove is used to accommodate a second surgical instrument and / or prevent the second surgical instrument from continuing to move in the first direction.

[0018] In a second aspect, the present invention provides a suture tightening device, comprising: a first take-up wheel, a second take-up wheel and the clamping mechanism described in the first aspect;

[0019] The first take-up wheel and the second take-up wheel are arranged at an interval, and the first take-up wheel and the second take-up wheel are respectively rotatably connected to the bracket.

[0020] In combination with the second aspect, the present invention provides a first possible implementation manner of the second aspect, wherein both the first take-up wheel and the second take-up wheel include: a wheel body, a first wheel disc and a second wheel disc;

[0021] The wheel body, the first wheel disc and the second wheel disc are coaxially arranged;

[0022] The first wheel disc and the second wheel disc are arranged at an interval, the first wheel disc and the second wheel disc are respectively connected to the wheel body, and a winding groove is formed between the first wheel disc and the second wheel disc.

[0023] In combination with the first possible implementation manner of the second aspect, the present invention provides a second possible implementation manner of the second aspect, wherein a wire clamping groove is provided on the first take-up wheel and / or the second take-up wheel.

[0024] In combination with the first possible implementation of the second aspect, the present invention provides a third possible implementation of the second aspect, wherein the first take-up wheel and / or the second take-up wheel is provided with a plurality of limiting portions, and the plurality of limiting portions are spaced apart around the wheel axle.

[0025] In combination with the third possible implementation of the second aspect, the present invention provides a fourth possible implementation of the second aspect, wherein an elastic limiter is installed on the bracket, the elastic limiter is adapted to the limiter portion, and the elastic limiter has a tendency to remain engaged with the limiter portion.

[0026] In combination with the fourth possible implementation manner of the second aspect, the present invention provides a fifth possible implementation manner of the second aspect, wherein the elastic limiting member is supported on the first wire take-up wheel and the second wire take-up wheel to prevent the first wire take-up wheel and the second wire take-up wheel from rotating, and keep the sutures extending from the first surgical instrument to the first wire take-up wheel and the second wire take-up wheel respectively taut;

[0027] The elastic limiting member is inclined along the circumference of the take-up wheel. When the first take-up wheel or the second take-up wheel is rotated to tighten the suture thread, the limiting portion pushes the elastic limiting member to make the elastic limiting member slip relative to the limiting portion.

[0028] The embodiment of the present invention brings the following beneficial effects: a bracket is detachably connected to the first surgical instrument, a first clamp arm and a second clamp arm are movably mounted on the bracket, a clamping area is formed between the first clamp arm and the second clamp arm, and the first surgical instrument can be disassembled and assembled as needed, so that the clamping and release of the second surgical instrument can be easily realized, without the need for the operator to manually fix the second surgical instrument, and interference with the operation due to the additional manpower to fix the second surgical instrument can be avoided. It is particularly suitable for clamping and fixing the locking tangent mechanism on the endoscope handle, which can avoid bending of the locking tangent mechanism and will not cause control interference.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 Schematic diagram of a suture tightening device provided in an embodiment of the present invention Figure 1 ;

[0032] Figure 2 A schematic diagram of a first take-up wheel of a suture tightening device provided in an embodiment of the present invention;

[0033] Figure 3 Schematic diagram of a suture tightening device provided in an embodiment of the present invention Figure 2 ;

[0034] Figure 4 A schematic diagram of a suture tightening device and a first surgical instrument provided in an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of a first clamping arm and a second clamping arm of a suture tightening device provided by an embodiment of the present invention;

[0036] Figure 6 is a schematic diagram of a first surgical instrument;

[0037] Figure 7 A schematic diagram of a support, a first clamping arm, and a second clamping arm of a suture tightening device provided by an embodiment of the present invention;

[0038] Figure 8 A schematic diagram of another first take-up wheel of the suture tightening device provided by an embodiment of the present invention;

[0039] Fig. 9 It is a schematic diagram of a first surgical instrument, a suture, a thread locking mechanism and a tightening wheel in the prior art.

[0040] Icons: 100 - first take-up wheel; 101 - winding groove; 102 - clamping groove; 103 - limiting part; 131 - inclined plane; 110 - wheel body; 120 - first wheel disc; 130 - second wheel disc; 200 - second take-up wheel; 300 - bracket; 301 - limiting groove; 302 - convex ridge; 303 - yielding groove; 304 - locking limiting structure; 310 - first clamping arm; 311 - first tooth part; 312 - first limiting groove; 320 - second clamping arm; 321 - second tooth part; 322 - second limiting groove; 330 - crossbeam; 400 - first surgical instrument; 401 - endoscope working cavity; 410 - boss; 500 - elastic limiting member; 600 - tightening wheel; 700 - suture; 800 - thread locking mechanism; 810 - outer tube. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] like Figure 1 , Figure 3 , Figure 4 and Fig. 9 As shown, the clamping mechanism provided by the embodiment of the present invention includes a bracket 300 detachably connected to a first surgical instrument 400; a first clamping arm 310 and a second clamping arm 320 are movably mounted on the bracket 300, and a clamping area is formed between the first clamping arm 310 and the second clamping arm 320. The second surgical instrument can be clamped and fixed by the clamping area, so that the second surgical instrument can be kept in a stable position relative to the first surgical instrument 400, so that the operator does not need to hold and fix the second surgical instrument alone, and does not need to rely on the assistance of others to limit and fix the second surgical instrument, which can avoid interference with the operator or interference between the operations of multiple surgical instruments. Among them, the first surgical instrument 400 can be configured as an endoscope handle or other surgical instruments, and the second surgical instrument includes a locking tangent mechanism 800.

[0045] Compared with the prior art, the outer tube 810 of the thread-locking mechanism 800 can be clamped in the clamping area between the first clamping arm 310 and the second clamping arm 320, so that the thread-locking mechanism 800 remains stable relative to the first surgical instrument 400, thereby avoiding the thread-locking mechanism 800 from deflecting during the process of tightening the suture, which is conducive to the operator to achieve thread-locking and thread-locking with one hand. The clamping area can also be used to clamp other endoscopic surgical instruments to ensure that the second surgical instrument remains stable relative to the first surgical instrument 400, thereby reducing the difficulty of the operator's operation.

[0046] In an optional embodiment, the first clamp arm 310 and the second clamp arm 320 can be configured as elastic devices, so that the clamping area can be elastically clamped. In addition, the first clamp arm 310 and the second clamp arm 320 can be connected to the bracket 300 by sliding connection or hinge connection. When the first clamp arm 310 and the second clamp arm 320 can be connected by sliding connection, the first clamp arm 310 and the second clamp arm 320 can be driven by an elastic limiter, so that the outer tube of the locking and cutting mechanism can be clamped between the first clamp arm 310 and the second clamp arm 320.

[0047] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in this embodiment, one end of the first clamp arm 310 and one end of the second clamp arm 320 are respectively hinged to the bracket 300, and the other end of the first clamp arm 310 is opposite to the other end of the second clamp arm 320, and a clamping area is formed; the bracket 300 squeezes the first clamp arm 310 and the second clamp arm 320, and the first clamp arm 310 and the second clamp arm 320 have a tendency to form an angle. A rotating shaft installation groove is provided on the bracket 300, and the first clamp arm 310 and the second clamp arm 320 are respectively provided with a rotating shaft part, and the two rotating shaft parts are matched in the two rotating shaft installation grooves one by one. On the cross section perpendicular to the axis of the rotating shaft, the central angle corresponding to the rotating shaft installation groove is greater than 180 degrees, so that the rotating shaft part can be limited in the rotating shaft installation groove, and the first clamp arm 310 and the second clamp arm 320 can swing within a certain angle range. When the first clamp arm 310 and the second clamp arm 320 are relatively straight, the first clamp arm 310 and the second clamp arm 320 are squeezed by the bracket 300, thereby reducing the distance between the two rotating shaft parts, so that the first clamp arm 310 and the second clamp arm 320 form an angle, thereby forming a shearing structure at the clamping area to achieve clamping and releasing of the outer tube 810.

[0048] It should be noted that the distance between the two shaft mounting grooves is regarded as the first rod length, the length of the first clamp arm 310 is the second rod length, the length of the second clamp arm 320 is the third rod length, and the first rod length is less than the sum of the second rod length and the third rod length. Therefore, the bracket 300, the first clamp arm 310 and the second clamp arm 320 together form a three-bar mechanism with a dead point position. The bracket 300, the first clamp arm 310 or the second clamp arm 320 is elastically deformed, and the first rod length, the second rod length and the third rod length can be temporarily collinear. After breaking the balance, the first clamp arm 310 and the second clamp arm 320 will deflect relative to the bracket 300 around the pivot axis, thereby forming an angle between the first clamp arm 310 and the second clamp arm 320, and in this state, the locked state or the unlocked state can be achieved.

[0049] In the unlocked state, an opening is formed on one side of the clamping area; the clamped part of the second surgical instrument enters the clamping area through the opening along the first direction, and pushes the first clamp arm 310 and the second clamp arm 320 to switch to the locked state synchronously, so that the opening is reduced or closed; when the clamped part, the first clamp arm 310 or the second clamp arm 320 are operated in the reverse direction along the first direction, the first clamp arm 310 and the second clamp arm 320 are synchronously switched to the unlocked state, so that the clamped part is removed through the opening. When locking is required, the clamped part is inserted into the clamping area through the opening, and the first clamp arm 310 and the second clamp arm 320 can be driven to reach the locked state by toggling and pressing accordingly. When unlocking, it is only necessary to lift the clamped part of the second surgical instrument, or to toggle the first clamp arm 310 and the second clamp arm 320 in the reverse direction, so that the first clamp arm 310 and the second clamp arm 320 can be driven to swing in the reverse direction to the unlocked state, which is easy to operate, can be operated with one hand, and does not need to change the position of the hand, making the control more convenient.

[0050] In this embodiment, taking the locking cutting mechanism 800 selected as the second surgical instrument as an example, in the locked state, the outer tube 810 is coaxial with the endoscope working channel 401 of the first surgical instrument 400, thereby preventing the outer tube 810 from bending, and allowing the pull wire inside the outer tube 810 to be pulled back smoothly.

[0051] Furthermore, the first clamp arm 310 is provided with a first limiting groove 312, and the second clamp arm 320 is provided with a second limiting groove 322 opposite to the first limiting groove 312, and a clamping area is formed between the first limiting groove 312 and the second limiting groove 322; in the locked state, the bracket 300 squeezes the first clamp arm 310 and the second clamp arm 320 toward the first direction. Figure 7 The outer tube 810 (clamped portion) of the thread-locking mechanism 800 (second surgical instrument) is clamped between the first limiting groove 312 and the second limiting groove 322; in the unlocked state, the bracket 300 squeezes the first clamp arm 310 and the second clamp arm 320 toward the second direction. Figure 7 The first clamp arm 310 and the second clamp arm 320 are tilted in the direction b shown in the figure to expand the clamp opening between the first limiting groove 312 and the second limiting groove 322. When the first clamp arm 310 and the second clamp arm 320 are relatively straight, the first clamp arm 310 and the second clamp arm 320 reach a balance point; the operator can break the balance with one hand operation, so that the first clamp arm 310 and the second clamp arm 320 are tilted synchronously, thereby achieving locking and unlocking.

[0052] In a feasible embodiment, when the first limiting groove 312 and the second limiting groove 322 are spliced ​​and the axes are colinear, the first clamp arm 310 and the second clamp arm 320 reach the dead point position, and after passing the dead point position in direction a, the first clamp arm 310 and the second clamp arm 320 are limited by the locking limiting structure 304, and the outer tube 810 (clamped part) of the locking cutting mechanism 800 (second surgical instrument) is clamped between the first limiting groove 312 and the second limiting groove 322.

[0053] Furthermore, the bracket 300 is provided with a locking limit structure 304, or the first clamp arm 310 and / or the second clamp arm 320 are provided with a locking limit structure 304; the locking limit structure 304 is used to prevent the first clamp arm 310 and the second clamp arm 320 from continuing to deflect in the first direction in the locked state.

[0054] When the bracket 300 is provided with a locking and limiting structure 304, in the locked state, at least one of the first clamp arm 310 and the second clamp arm 320 can abut against the locking and limiting structure 304 to limit the first clamp arm 310 and the second clamp arm 320 from being deflected to the first direction. On the one hand, it can prevent the first clamp arm 310 and the second clamp arm 320 from swinging excessively, and on the other hand, it can prevent the outer tube 810 between the first limiting groove 312 and the second limiting groove 322 from being damaged by excessive clamping and compression.

[0055] When the first clamp arm 310 or the second clamp arm 320 is provided with a locking limit structure 304, or the first clamp arm 310 and the second clamp arm 320 are both provided with a locking limit structure 304, in the locked state, the first clamp arm 310 and the second clamp arm 320 are mutually limited by the locking limit structure 304, thereby limiting the extreme position of the first clamp arm 310 and the second clamp arm 320 deflecting in the first direction.

[0056] Furthermore, the first clamp arm 310 is provided with a first tooth portion 311, and the second clamp arm 320 is provided with a second tooth portion 321 adapted to the first tooth portion 311. The first tooth portion 311 cooperates with the second tooth portion 321, and a clamping area is formed between the first tooth portion 311 and the second tooth portion 321, so that the first clamp arm 310 and the second clamp arm 320 can be accurately aligned, thereby avoiding relative looseness of the first clamp arm 310 and the second clamp arm 320, and can better maintain the first clamp arm 310 and the second clamp arm 320 in a dead point locking state, and improve the stability of the clamped outer tube 810.

[0057] like Figure 1 , Figure 3 and Figure 4 As shown, the bracket 300 is also provided with a crossbeam 330, and the crossbeam 330 is provided with a clearance groove 303. The clearance groove 303 is used to accommodate the second surgical instrument, or the clearance groove 303 is used to prevent the second surgical instrument from continuing to move in the first direction. In an optional embodiment, the clearance groove 303 can also accommodate the second surgical instrument, and the second surgical instrument is prevented from continuing to move in the first direction through the bottom or side wall of the clearance groove 303. The clearance groove 303 is preferably opposite to the clamping area. Among them, the locking limit structure 304 can be configured as a limit protrusion set on the crossbeam 330. When the first clamp arm 310 and the second clamp arm 320 clamp the second surgical instrument, the second surgical instrument passes through the clearance groove 303 and extends to the endoscope working cavity, which makes the structure more compact on the one hand, and avoids the bending of the second surgical instrument on the other hand, thereby making the operation of the pull wire in the locking and cutting operation smoother. The second surgical instrument may be a locking thread cutting mechanism 800 or other endoscopic surgical instruments. Preferably, the shapes of the first limiting groove 312, the second limiting groove 322 and the clearance groove 303 are adapted to the clamped part of the clamped instrument.

[0058] like Figure 1 , Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the suture tightening device provided by the embodiment of the present invention includes: a first wire taking-up wheel 100, a second wire taking-up wheel 200 and a bracket 300 detachably connected to a first surgical instrument 400; the first wire taking-up wheel 100 and the second wire taking-up wheel 200 are arranged at an interval, and the first wire taking-up wheel 100 and the second wire taking-up wheel 200 are rotatably connected to the bracket 300 respectively.

[0059] During the wire-reeling operation, the two sutures 700 are wound around the first wire-reeling wheel 100 and the second wire-reeling wheel 200 in a one-to-one correspondence. By rotating the first wire-reeling wheel 100 and the second wire-reeling wheel 200, the two sutures 700 can be tightened respectively. The first wire-reeling wheel 100 and the second wire-reeling wheel 200 can rotate separately, and then one of the two sutures 700 can be adjusted to be tightened or loosened separately, thereby avoiding the deflection of the locking and cutting positions of the two sutures 700. In addition, the bracket 300 can be installed on the first surgical instrument 400, so that the size of the endoscope working channel 401 of the first surgical instrument 400 from the first wire-reeling wheel 100 and the second wire-reeling wheel 200 remains unchanged, which can avoid the wire-reeling operation interfering with other devices and facilitate the control of the wire-reeling length of the suture 700.

[0060] like Figure 1 , Figure 2 and Figure 8 As shown, in the embodiment of the present invention, the first take-up wheel 100 and the second take-up wheel 200 both include: a wheel body 110, a first wheel disc 120 and a second wheel disc 130; the wheel body 110, the first wheel disc 120 and the second wheel disc 130 are coaxially arranged; the first wheel disc 120 and the second wheel disc 130 are spaced apart, the first wheel disc 120 and the second wheel disc 130 are respectively connected to the wheel body 110, and a winding groove 101 is formed between the first wheel disc 120 and the second wheel disc 130.

[0061] During the wire-reeling operation, the suture 700 is led out of the endoscope working channel 401 by a lead wire, and the suture 700 is wound around the wheel body 110. The suture 700 can be restricted in the winding groove 101 by the first wheel disc 120 and the second wheel disc 130, thereby preventing the suture 700 from falling off the wheel body 110. By rotating the first wire-reeling wheel 100 and the second wire-reeling wheel 200, the length of the suture 700 wound around the first wire-reeling wheel 100 and the second wire-reeling wheel 200 can be controlled respectively, thereby realizing the adjustment of the wire-reeling length.

[0062] Furthermore, a wire clamping groove 102 is provided on the first wire take-up wheel 100 and / or the second wire take-up wheel 200 .

[0063] In an optional embodiment, the clamping groove 102 is provided on the first take-up wheel 100, or the clamping groove 102 is provided on the second take-up wheel 200, or the first take-up wheel 100 and the second take-up wheel 200 are provided with the clamping groove 102. The end of the suture 700 passes through the clamping groove 102, and the suture 700 is clamped by the clamping groove 102, thereby preventing the suture 700 from loosening and falling off.

[0064] Furthermore, the first take-up wheel 100 and / or the second take-up wheel 200 is provided with a plurality of limiting portions 103, and the plurality of limiting portions 103 are arranged at intervals around the wheel axle.

[0065] In an optional embodiment, a plurality of limiting portions 103 are provided on the first take-up wheel 100, or a plurality of limiting portions 103 are provided on the second take-up wheel 200, or a plurality of limiting portions 103 are provided on both the first take-up wheel 100 and the second take-up wheel 200. The limiting portion 103 is configured as a toothed portion or a slot, and a knurling structure is formed on the circumference of the first take-up wheel 100 and the second take-up wheel 200 by a plurality of limiting portions 103, so that the friction force when the first take-up wheel 100 and the second take-up wheel 200 are touched by hand can be increased, and slipping can be avoided when the first take-up wheel 100 and the second take-up wheel 200 are rotated by manual operation.

[0066] In addition, an elastic stopper 500 is mounted on the bracket 300, and the elastic stopper 500 is adapted to the stopper 103, and the elastic stopper 500 has a tendency to remain fitted with the stopper 103. The elastic stopper 500 abuts against one of the stopper 103 in the rebound state, thereby locking the first take-up wheel 100 and the second take-up wheel 200, thereby locking the tightened size of the suture 700.

[0067] In this embodiment, the elastic limit member 500 is supported on the first take-up wheel 100 and the second take-up wheel 200 to prevent the first take-up wheel 100 and the second take-up wheel 200 from rotating and keep the suture 700 extending from the first surgical instrument 400 to the first take-up wheel 100 and the second take-up wheel 200 respectively taut.

[0068] The limiting portion 103 has an inclined surface 131 or the elastic limiting member 500 is inclined along the circumferential direction of the take-up wheel. When the first take-up wheel 100 or the second take-up wheel 200 is rotated to tighten the suture thread 700, the limiting portion 103 pushes the elastic limiting member 500 to make the elastic limiting member 500 slip relative to the limiting portion 103.

[0069] When the first take-up wheel 100 and the second take-up wheel 200 are rotated by an external force, the elastic stopper 500 is pushed by the inclined surface 131, so that the end of the elastic stopper 500 can be separated from the stopper 103, so that the first take-up wheel 100 and the second take-up wheel 200 can continue to rotate, so as to continue to pull the suture 700 for tightening operation. When it is necessary to readjust the tightening state of the two sutures 700, the elastic stopper 500 can be manually operated to release the lock of the first take-up wheel 100 and the second take-up wheel 200, and the first take-up wheel 100 and the second take-up wheel 200 rotate respectively under the tension of the suture 700, and then the elastic stopper 500 is released, and the first take-up wheel 100 and the second take-up wheel 200 are rotated again, respectively, so that the two sutures 700 can be readjusted to be tightened again, so that the two sutures 700 can be rewound when the locking position of the two sutures 700 is deviated.

[0070] like Figure 4 and Figure 6 As shown, the bracket 300 is provided with a limiting groove 301, and the first surgical instrument 400 is provided with a boss 410 inserted into the limiting groove 301. The endoscope working channel 401 is arranged on the boss 410, and the boss 410 is matched in the limiting groove 301, so that the bracket 300 can be positioned relative to the first surgical instrument 400 when the bracket 300 is installed.

[0071] like Figure 4 , Figure 6 and Figure 7 As shown, the bracket 300 is also provided with a convex ridge portion 302, and the convex ridge portion 302 abuts against the top surface of the boss 410. The axis of the endoscope working channel 401 is perpendicular to the top surface of the boss 410, and the convex ridge portion 302 abuts against the top surface of the boss 410, so that the bracket 300 can be positioned relative to the boss 410 in the axial direction of the endoscope working channel 401, thereby ensuring the stability of the position of the bracket 300. In addition, the bracket 300 can be fixed by binding with a strap, or a slide groove can be set on the first surgical instrument 400, and the bracket 300 can be slidably inserted in the slide groove, so as to achieve a detachable installation of the bracket 300 relative to the first surgical instrument 400.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A clamping mechanism, characterized in that: It comprises a support (300) detachably connected to a first surgical instrument (400); A first clamping arm (310) and a second clamping arm (320) are movably mounted on the bracket (300), and a clamping area is formed between the first clamping arm (310) and the second clamping arm (320).

2. The clamping mechanism according to claim 1, characterized in that: One end of the first clamp arm (310) and one end of the second clamp arm (320) are respectively pivotally connected to the bracket (300), and the other end of the first clamp arm (310) is opposite to the other end of the second clamp arm (320) to form the clamping area.

3. The clamping mechanism according to claim 1 or 2, characterized in that: The bracket (300) is elastic, and the bracket (300) squeezes the first clamp arm (310) and the second clamp arm (320), so that the first clamp arm (310) and the second clamp arm (320) tend to form an angle.

4. The clamping mechanism according to claim 2, characterized in that: In the unlocked state, one side of the clamping area forms an opening; The clamped portion of the second surgical instrument enters the clamping area through the opening along the first direction, and pushes the first clamping arm (310) and the second clamping arm (320) to switch synchronously to a locked state, so that the opening is reduced or closed; When the clamped portion, the first clamping arm (310) or the second clamping arm (320) is operated in the reverse direction of the first direction, the first clamping arm (310) and the second clamping arm (320) are synchronously switched to the unlocked state so that the clamped portion is removed through the opening.

5. The clamping mechanism according to claim 4, characterized in that: The first clamping arm (310) is provided with a first limiting groove (312), and the second clamping arm (320) is provided with a second limiting groove (322) opposite to the first limiting groove (312), and the clamping area is formed between the first limiting groove (312) and the second limiting groove (322); In the locked state, the bracket (300) squeezes the first clamp arm (310) and the second clamp arm (320) to deflect in a first direction, and the second surgical instrument is clamped between the first limiting groove (312) and the second limiting groove (322); In the unlocked state, the bracket (300) squeezes the first clamping arm (310) and the second clamping arm (320) to deflect in a second direction, so as to expand the opening of the clamping area between the first limiting groove (312) and the second limiting groove (322).

6. The clamping mechanism according to claim 4 or 5, characterized in that: The bracket (300) is provided with a locking and limiting structure (304), or the first clamping arm (310) and / or the second clamping arm (320) is provided with a locking and limiting structure (304); The locking limit structure (304) is used to prevent the first clamp arm (310) and the second clamp arm (320) from continuing to deflect in the first direction in a locked state.

7. The clamping mechanism according to claim 1, characterized in that: The first clamping arm (310) is provided with a first tooth portion (311), and the second clamping arm (320) is provided with a second tooth portion (321) adapted to the first tooth portion (311), the first tooth portion (311) cooperates with the second tooth portion (321), and the clamping area is formed between the first tooth portion (311) and the second tooth portion (321).

8. The clamping mechanism according to claim 1, characterized in that: The support (300) is further provided with a crossbeam (330), and the crossbeam (330) is provided with a clearance groove (303), and the clearance groove (303) is used to accommodate a second surgical instrument and / or prevent the second surgical instrument from continuing to move in the first direction.

9. A suture tightening device, characterized in that: include: A first take-up wheel (100), a second take-up wheel (200), and a clamping mechanism as claimed in any one of claims 1 to 8; The first take-up wheel (100) and the second take-up wheel (200) are arranged at an interval, and the first take-up wheel (100) and the second take-up wheel (200) are respectively rotatably connected to the bracket (300).

10. The suture tightening device according to claim 9, characterized in that: The first take-up wheel (100) and the second take-up wheel (200) both comprise: a wheel body (110), a first wheel disc (120) and a second wheel disc (130); The wheel body (110), the first wheel disc (120) and the second wheel disc (130) are coaxially arranged; The first wheel disc (120) and the second wheel disc (130) are arranged at an interval, the first wheel disc (120) and the second wheel disc (130) are respectively connected to the wheel body (110), and a winding groove (101) is formed between the first wheel disc (120) and the second wheel disc (130).

11. The suture tightening device according to claim 10, characterized in that: The first take-up wheel (100) and / or the second take-up wheel (200) are provided with a wire clamping groove (102).

12. The suture tightening device according to claim 10, characterized in that: The first take-up wheel (100) and / or the second take-up wheel (200) are provided with a plurality of limiting portions (103), and the plurality of limiting portions (103) are arranged at intervals around the wheel axle.

13. The suture tightening device according to claim 12, characterized in that: An elastic limiting member (500) is installed on the bracket (300), the elastic limiting member (500) is adapted to the limiting portion (103), and the elastic limiting member (500) has a tendency to remain fitted to the limiting portion (103).

14. The suture tightening device according to claim 13, characterized in that: The elastic limiting member (500) is supported on the first wire taking-up wheel (100) and the second wire taking-up wheel (200) to prevent the first wire taking-up wheel (100) and the second wire taking-up wheel (200) from rotating, and to keep the suture (700) extending from the first surgical instrument (400) to the first wire taking-up wheel (100) and the second wire taking-up wheel (200) respectively taut; The elastic limiting member (500) is inclined along the circumference of the take-up wheel, and when the first take-up wheel (100) or the second take-up wheel (200) is rotated to tighten the suture thread (700), the limiting portion (103) pushes the elastic limiting member (500) to make the elastic limiting member (500) slip relative to the limiting portion (103).

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