Drive control mechanism of a tissue fixation device and tissue fixation device

Abstract

The application provides a driving control mechanism of a tissue fixing device and the tissue fixing device, which comprises a supporting mechanism and a locking control assembly; when a sliding driving part is located at an initial position, a second limiting part is at least partially in contact with a first limiting part in a radial direction, so that a locking part limits an axial movement of a fixed connecting assembly relative to a driving assembly; when the sliding driving part slides from the initial position to a first preset position, the second limiting part can be separated from the first limiting part in the radial direction. Through the cooperation of the fixed connecting assembly and the driving assembly which can directly move relative to the axial movement, the purpose of quickly driving the holding mechanism to realize opening and closing is achieved, and meanwhile, the locking control assembly is cooperated, so that the driving assembly can be effectively locked when sliding to different positions, the loosening of the clamping mechanism is prevented, and the stable clamping of the tissue is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to a medical device, in particular to a driving control mechanism of a tissue fixation device and a tissue fixation device. BACKGROUND

[0002] The most common treatment for mitral regurgitation relies on prosthetic valve replacement, as well as valve repair reshaping, such as posterior leaflet quadrangular resection, chord folding, edge-to-edge repair technology, artificial chord implantation technology, replacement and repair of these technologies usually rely on open heart surgery, in which the patient's chest is usually opened by sternal incision, and the patient is placed on cardiopulmonary bypass.

[0003] Valve clamp devices developed on the basis of the principle of surgical valve edge-to-edge suture technology are currently the most recognized because of their high safety, simple technical principle and great feasibility.

[0004] In the prior art, the clamping mechanism of the valve clamp device is opened and closed by the displacement of the driving device relative to the supporting device, for example, the application number 202023300828.9 discloses a system for clamping tissue, the sliding groove driving part can slide relatively in the guide sliding groove to drive the two closing clamping parts to approach or move away from each other. Through the improvement of the driving mode, the stability and reliability of capturing the valve leaflet are improved. Among them, the way adopted by the prior art is to provide a base inner cavity in the base shell, a base threaded part is arranged in the base inner cavity, and the driving assembly includes a driving shaft, and the driving shaft includes a driving threaded part matched with the base threaded part. Although stable driving can be achieved through threaded matching, the control speed is lower than that of the direct telescopic driving transmission mechanism, however, the direct telescopic driving transmission mechanism cannot be effectively positioned at a specific clamping position and is prone to looseness. Therefore, it is necessary to provide a driving control mechanism which can be quickly driven and effectively positioned at any time. SUMMARY

[0005] In order to solve the above technical problems, the present application provides a driving control mechanism of a tissue fixation device and a tissue fixation device, which adopts the cooperation form of a fixed connection assembly and a driving assembly capable of direct relative axial movement, achieves the purpose of quickly driving the holding mechanism to open and close, and at the same time cooperates with the locking control assembly to effectively lock the driving assembly when it slides to different positions, prevents the loosening of the clamping mechanism, and realizes the stable clamping of the tissue.

[0006] Specifically, the following solutions are included:

[0007] A driving control mechanism of a tissue fixation device, comprising:

[0008] The supporting mechanism comprises a fixed connecting assembly and a driving assembly capable of moving axially relative to the fixed connecting assembly, the driving assembly drives the opening and closing of the clamping mechanism of the tissue fixing device by moving axially relative to the fixed connecting assembly; the driving assembly comprises a first limiting part;

[0009] The locking control assembly comprises a sliding member and a locking member, a sliding driving part of the sliding member is sleeved outside the fixed connecting assembly;

[0010] The locking member comprises a second limiting part matched with the first limiting part;

[0011] When the sliding driving part is at the initial position, the second limiting part is radially limited, and the second limiting part is at least partially in contact with the first limiting part, so that the locking member limits the axial movement of the driving assembly relative to the fixed connecting assembly;

[0012] When the sliding driving part slides from the initial position to the first preset position, the second limiting part can be radially separated from the first limiting part.

[0013] Further, the locking control assembly further comprises an unlocking driving member connected with the sliding driving part, for providing a driving force for driving the sliding driving part towards the first preset position;

[0014] The sliding member further comprises an elastic reset part, which applies a biasing force towards the initial position to the sliding driving part during the sliding of the sliding driving part from the initial position to the first preset position.

[0015] Further, the unlocking driving member is a pull wire, the first preset position is proximal to the initial position, the elastic reset part is an elastic compression member arranged proximally to the sliding driving part, and the proximal end of the elastic reset part is axially fixed relative to the fixed connecting assembly.

[0016] Further, the locking control assembly further comprises a limiting sleeve fixedly connected with the fixed connecting assembly, the limiting sleeve is provided with a limiting clamping part matched with the proximal end of the elastic reset part, so as to limit the axial movement of the proximal end of the elastic reset part.

[0017] Further, the sliding driving part is provided with a pull wire connecting hole, the pull wire connecting hole is a double-hole structure, and the unlocking driving member enters from one hole and exits from the other hole.

[0018] Further, the unlocking driving member is a push rod, the first preset position is located distally to the initial position, and the elastic reset part is an elastic stretching member arranged proximally to the sliding driving part, and the proximal end of the elastic reset part is axially fixed relative to the fixed connection assembly.

[0019] Further, the locking member comprises a lock tongue positioning member, and the fixed connection assembly is provided with a lock tongue accommodating cavity for radial sliding of the lock tongue positioning member.

[0020] The sliding driving part is provided with an unlocking opening, and when the sliding driving part is located at the initial position, the inner side wall thereof is fitted to the outer side wall of the fixed connection assembly to limit radial sliding of the lock tongue positioning member; when the sliding driving part is located at the first preset position, the unlocking opening is opposite to the lock tongue accommodating cavity to enable the lock tongue positioning member to radially slide to disengage the first limiting part from the second limiting part.

[0021] Further, the first limiting part is a plurality of arc-shaped limiting grooves arranged axially along the driving assembly.

[0022] The lock tongue positioning member is in a spherical or cylindrical structure, and the end part of the lock tongue positioning member is a second limiting part matched with the arc-shaped limiting grooves.

[0023] Further, the first limiting part is a first threaded locking part arranged on the outer surface of the driving assembly.

[0024] The locking member further comprises a locking threaded sleeve and a threaded unlocking elastic member, and the second limiting part is a second threaded locking part arranged inside the locking threaded sleeve and matched with the first threaded locking part.

[0025] The locking threaded sleeve is a sleeve structure with a slotted side wall, and the threaded unlocking elastic member is located inside the slotted side wall and provides an extrusion force for expanding the slotted side wall.

[0026] When the sliding driving part is located at the initial position, the lock tongue positioning member extrudes the outer surface of the locking threaded sleeve to counteract the extrusion force of the threaded unlocking elastic member, so that the second threaded locking part is matched and locked with the first threaded locking part.

[0027] In another aspect, the application further provides a tissue fixing device comprising a clamping mechanism, a clutching mechanism and the driving control mechanism as described above.

[0028] As described above, the application has the following beneficial effects:

[0029] 1) This application achieves the purpose of rapidly driving the clamping mechanism to open and close by adopting a combination of a fixed connection component and a drive component that can directly move relative to each other axially. At the same time, the locking control component can effectively lock the drive component when it slides to different positions, preventing the clamping mechanism from loosening and achieving stable clamping of the tissue.

[0030] 2) The provision of a limit sleeve can limit the axial movement of the proximal end of the elastic reset portion. In addition, the distal end of the sliding drive portion is preferably provided with a base clearance opening to ensure that it can only undergo axial compression and expansion on the fixed connection assembly, without rotation. The limit sleeve's snap-fitting portion snaps into the capture clamp slot to limit the axial movement and rotation of the capture clamp body in this embodiment.

[0031] 3) The present application realizes the sliding control of the dynamic driving part by using a pull wire, and the pull wire cooperates with the pull wire connection hole. When the pull wire is disengaged, one end of the foldable pull wire is loosened, and the other end is pulled to pull the pull wire out of the double hole;

[0032] 4) A power-assisting elastic member is provided. In conjunction with the driving method of the present application, by adding the power-assisting elastic member, the internal force generated by the capture clamp can be partially or completely offset, thereby reducing the friction of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0034] Attachment Figure 1 This is a schematic diagram of the external structure of the drive control mechanism in the embodiment of the present application in a locked state;

[0035] Attachment Figure 2 This is a schematic diagram of the external structure of the drive control mechanism in the unlocked state according to an embodiment of the present application;

[0036] Attachment Figure 3 This is a schematic structural diagram of the sliding member in an extended state and a compressed state according to an embodiment of the present application;

[0037] Attachment Figure 4 This is a schematic structural diagram of the first form of the limit sleeve in the embodiment of the present application;

[0038] Attachment Figure 5 This is a schematic structural diagram of the main parts of the fixed connection assembly according to an embodiment of the present application;

[0039] Attachment Figure 6The internal structure diagram of the first form of the locking control assembly in the locked state of the application;

[0040] The internal structure diagram of the first form of the locking control assembly in the locked state of the application; Figure 7 The structure diagram of the two perspectives of the driving assembly of the first form of the embodiment of the application;

[0041] The internal structure diagram of the first form of the locking control assembly in the locked state of the application; Figure 8 The internal structure diagram of the first form of the locking control assembly in the locked state of the application;

[0042] The internal structure diagram of the first form of the locking control assembly in the locked state of the application; Figure 9 The internal structure diagram of the second form of the locking control assembly in the locked state of the embodiment of the application;

[0043] The internal structure diagram of the second form of the locking control assembly in the locked state of the embodiment of the application; Figure 10 The internal structure diagram of the second form of the locking control assembly in the unlocked state of the embodiment of the application;

[0044] The internal structure diagram of the second form of the locking control assembly in the unlocked state of the embodiment of the application; Figure 11 The structure diagram of the second form of the driving assembly of the embodiment of the application

[0045] The structure diagram of the second form of the driving assembly of the embodiment of the application Figure 12 The part structure diagram of the locking threaded sleeve of the embodiment of the application;

[0046] The part structure diagram of the locking threaded sleeve of the embodiment of the application; Figure 13 The structure diagram of the second form of the limiting sleeve of the embodiment of the application. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the application will be clearly and completely described in connection with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. In the embodiments, "proximal end" refers to the direction close to the operator, and "distal end" refers to the direction away from the operator. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0048] The application adopts the cooperation form of the fixed connection assembly and the driving assembly capable of direct relative axial movement, achieves the purpose of quickly driving the holding mechanism to realize opening and closing, and at the same time cooperates with the locking control assembly, can effectively lock the driving assembly when sliding to different positions, prevents loosening of the clamping mechanism, realizes stable clamping of the tissue, and the specific implementation process is described in the following embodiments:

[0049] Embodiment 1:

[0050] The embodiment includes a driving control mechanism and a tissue fixation device, wherein the tissue fixation device comprises a clamping mechanism 1000 for closing the tissue, a supporting mechanism 2000 for mounting the clamping mechanism 1000, and a clutch mechanism 3000 at the proximal end of the supporting mechanism 2000 for detachable connection with a delivery and control assembly for delivering and controlling the tissue closing device.

[0051] In the conventional tissue fixation device, for example, a heart valve clamping fixation device, the clamping mechanism 1000 comprises a pair of closing members 1100 and a pair of capturing members 1200 corresponding to each closing member 1100; the closing members 1100 are opened and closed by a driving assembly 2200, and the capturing members 1200 are opened and closed by a control wire; when clamping the tissue, the clamping is achieved by the cooperation of the inner side of the closing members 1100 and the outer side of the capturing members 1200. The fixation device of the present application is delivered to a designated position of the heart by the delivery and control assembly, for example, the fixation device is delivered to the mitral valve, and when reaching the lesion position, the position where the anterior leaflet and the posterior leaflet of the heart valve cannot normally coapt is clamped by the cooperation of the closing members 1100 and the capturing members 1200 of the clamping mechanism 1000 in the embodiment, so that the position that cannot normally coapt is gathered together, thereby enabling the mitral valve to be completely closed or the opening area to be reduced, so as to alleviate or treat "mitral regurgitation".

[0052] When the clamping of the mitral valve is completed, the fixation device is separated from the delivery and control assembly by the clutch mechanism 3000, and the fixation device is thus left at the lesion position to maintain the fixation of the valve.

[0053] In the embodiment, the supporting mechanism 2000 comprises a fixed connection assembly 2100 and a driving assembly 2200 capable of relative movement with respect to the fixed connection assembly 2100; the distal end of the driving assembly 2200 is connected with the two closing members, so that when the driving assembly 2200 moves relatively with respect to the fixed connection assembly 2100, the opening or closing of the closing members 1100 is controlled; the clamping mechanism 1000 cooperates with the capturing members 1200 to clamp the tissue. When the driving assembly 2200 moves relatively with respect to the fixed connection assembly 2100, the sliding groove driving member can relatively slide in the guide sliding groove to drive the two closing clamping portions 1110 to relatively approach or move away from each other.

[0054] The driving assembly 2200 specifically comprises a driving shaft 2230 and a transmission rod clutch end 2220, and correspondingly, the clutch mechanism 3000 comprises a control rod 3100, the control rod 3100 is provided with a control rod clutch end 3120 and an external force driving shaft 3110 for transmitting force, the control rod clutch end 3120 is axially fixed opposite to the transmission rod clutch end 2220, so that the axial pushing force and pulling force can be transmitted to the driving assembly 2200 by driving the control rod 3100, thereby controlling the two closing clamping portions 1110 to relatively approach or move away from each other.

[0055] In the embodiment, the lever clutch end 3120 and the transmission rod clutch end 2220 are screwed through the cooperation of the internal thread and the external thread, so that the axial pulling force and pushing force can be transmitted. When the lever clutch end 3120 and the transmission rod clutch end 2220 need to be separated, the control lever 3100 is rotated relative to the driving assembly 2200 to separate the threaded connection between the control lever 3100 and the driving assembly 2200.

[0056] In the embodiment, the forward and backward movement of the driving assembly 2200 can be directly pushed or pulled by driving the control lever 3100, so that the fast positioning and clamping actions can be achieved. However, there is no mechanism in the prior art that can effectively lock and unlock at any time, so that when driving is needed, the fast positioning and clamping can be achieved by unlocking, and when the clamping mechanism reaches the preset position, it can be locked at any time and can maintain stable locking without providing continuous external force.

[0057] To achieve the above purpose, in the embodiment, a locking control assembly 4000 is provided, which includes a sliding member 4100 and a locking member 4200. The sliding drive part 4110 of the sliding member 4100 is slidingly sleeved outside the fixed connection assembly 2100. The locking member 4200 includes a second limiting part matched with the first limiting part 2210. When the sliding drive part 4110 is in the initial position, the second limiting part at least partially contacts the first limiting part 2210, so that the second limiting part is limited in the radial direction, and due to the limitation of the sliding drive part 4110, the second limiting part cannot be separated from the first limiting part 2210 in the radial direction, so that the locking member 4200 limits the axial movement of the driving assembly 2200 relative to the fixed connection assembly 2100. When the sliding drive part 4110 slides from the initial position to the first preset position, the second limiting part can be separated from the first limiting part 2210 in the radial direction. The cooperation of the above-mentioned cooperation locking control assembly can effectively lock the driving assembly when it slides to different positions, prevent the loosening of the clamping mechanism, and achieve stable clamping of the tissue.

[0058] Specifically, in the embodiment, in order to effectively drive the sliding drive part 4110 to slide between the initial position and the first preset position, the locking control assembly 4000 further includes an unlocking drive member 4300 connected with the sliding drive part 4110, for providing a driving force to the sliding drive part 4110 towards the first preset position, and corresponding to the above-mentioned arrangement, the sliding member 4100 further includes an elastic reset part 4120, which applies a biasing force to the sliding drive part 4110 towards the initial position during the sliding of the sliding drive part 4110 from the initial position to the first preset position.

[0059] Therefore, the process of driving the sliding driving part 4110 towards the first preset position by the unlocking driving part 4300 is the process of overcoming the deformation force generated by the elastic reset part 4120.

[0060] In the embodiment, the elastic reset part 4120 is an elastic compression part arranged at the proximal end of the sliding driving part 4110. Therefore, the process of driving the sliding driving part 4110 towards the first preset position is the process of compressing the elastic reset part 4120, and the elastic reset part 4120 generates a pushing force to push the sliding driving part 4110 towards the distal end in the process of compression. The unlocking driving part 4300 is a pull wire, the first preset position is located at the proximal end of the initial position, and the proximal end of the elastic reset part 4120 is fixed relative to the fixed connection assembly 2100 in the axial direction. Therefore, after the unlocking driving part 4300 is released, the sliding driving part 4110 is reset under the pushing of the elastic reset part 4120. Further preferably, the elastic reset part 4120 has a tubular structure, and a plurality of hollow features are arranged on the main body of the structure. The hollow features can have a rhombus shape or the like. When the tube is subjected to pressure, the hollow features are compressed, and the axial length of the tube is reduced. When the external force is eliminated or reduced, the features begin to recover to the natural state, and the axial length of the tube is restored.

[0061] In another embodiment, the elastic reset part 4120 can also be an elastic stretching part arranged at the proximal end of the sliding driving part 4110. Therefore, the process of driving the sliding driving part 4110 towards the first preset position is the process of stretching the elastic reset part 4120, and the elastic reset part 4120 generates a pulling force to pull the sliding driving part 4110 towards the proximal end in the process of stretching. Correspondingly, the unlocking driving part 4300 is a push rod, the first preset position is located at the distal end of the initial position, and the proximal end of the elastic reset part 4120 is fixed relative to the fixed connection assembly 2100 in the axial direction. Therefore, the process of unlocking is the process of pushing the sliding driving part 4110 towards the distal end by the push rod against the pulling force of the elastic reset part 4120.

[0062] In addition to the two implementation forms of the elastic reset part described above, other forms of pulling or pushing the sliding driving part can also be used to achieve unlocking and reset locking under the action of the elastic reset part. In the embodiment, the sliding control of the driving part is preferably achieved by a pull wire. The pull wire is relatively easy to enter the human body with the device and is easy to be finally detached.

[0063] Specifically, when the unlocking driving member 4300 is a pull wire, the sliding driving part 4110 is provided with a pull wire connecting hole 4111, which is a double-hole structure. The unlocking driving member 4300 enters from one hole and exits from the other hole, so that the pull wire can pull the sliding driving part 4110 to move proximally by pulling the spacer between the double holes. When the pull wire is detached, one end of the foldable pull wire is loosened, and the other end is pulled out, so that the pull wire is pulled out of the double holes. Further preferably, the pull wire connecting hole 4111 can be multiple and uniformly arranged on the outer side of the sliding driving part 4110, and the number of pull wires corresponds thereto. Synchronous pulling of multiple pull wires can achieve stable driving.

[0064] In addition, in order to prevent the locking control assembly 4000 from being deflected and moving axially towards the other end when being sleeved on the fixed connection assembly 2100, the locking control assembly 4000 further comprises a limiting sleeve 4400 in the embodiment, which is fixedly connected with the fixed connection assembly 2100. The limiting sleeve 4400 is provided with a limiting clamping part 4410 matched with the proximal end of the elastic reset part 4120, so as to limit the axial movement of the proximal end of the elastic reset part 4120. In addition, the distal end of the sliding driving part 4110 is preferably further provided with a base accommodation opening 4113, which can match the protruding shape of the fixed connection assembly 2100, so as to ensure that it can only be axially compressed and relaxed on the fixed connection assembly 2100, and cannot be rotated.

[0065] In the embodiment, preferably, the limiting sleeve 4400 is tubular in structure, which is fixed on the fixed connection assembly 2100 by welding, bonding or the like. It is provided with a limiting sleeve clamping groove 4410 corresponding to the lug of the proximal end of the elastic reset part 4120, which is used to limit the axial movement and circumferential rotation of the elastic reset part 4120. It is also provided with a limiting sleeve clamping part 4420, which is clamped into the capture clamp groove, which is used to limit the axial movement and circumferential rotation of the capture clamp body in the embodiment.

[0066] Further, in order to realize the above-mentioned that the sliding driving part 4110 is located in the initial position and is radially limited by the second limiting part, at this time, the second limiting part is at least partially in contact with the first limiting part 2210, and due to the limitation of the sliding driving part 4110, the second limiting part cannot be radially separated from the first limiting part 2210, so that the locking member 4200 limits the axial movement of the driving assembly 2200 relative to the fixed connection assembly 2100; when the sliding driving part 4110 slides from the initial position to the first preset position, the second limiting part can be radially separated from the first limiting part 2210. The specific arrangement and cooperation relationship of the first limiting part and the second limiting part will be described below.

[0067] In the embodiment, the locking piece 4200 comprises a lock tongue positioning piece 4210; the fixed connection assembly 2100 is provided with a lock tongue cavity 2110 for radial movement of the lock tongue positioning piece 4210; preferably, the lock tongue positioning piece 4210 is in a spherical or cylindrical structure, and an end of the lock tongue positioning piece 4210 is a second limiting part matched with the arc-shaped limiting groove. That is, the end of the lock tongue positioning piece 4210 directly serves as a shape matched with the first limiting part for locking and limiting; specifically, the sliding driving part 4110 is provided with an unlocking opening 4112, which can be a long hole provided on the sliding driving part 4110, and the hole diameter width is greater than the minimum outer diameter of the lock tongue positioning piece 4210 but less than the maximum outer diameter of the lock tongue positioning piece 4210, so that part of the lock tongue positioning piece 4210 can extend out, but will not fall out completely.

[0068] Thus, when the sliding driving part 4110 is located at the initial position, the inner side wall thereof is fitted with the outer side wall of the fixed connection assembly 2100 to limit the radial movement of the lock tongue positioning piece 4210; when the sliding driving part 4110 is located at the first preset position, the unlocking opening 4112 is aligned with the lock tongue cavity 2110, so that the radial movement of the lock tongue positioning piece 4210 makes the first limiting part 2210 disengage from the second limiting part. Preferably, the curvature of the arc-shaped limiting groove can be set as follows: when the sliding driving part 4110 is located at the first preset position, if the lock tongue positioning piece 4210 is still located in the arc-shaped limiting groove, if the driving assembly 2200 is axially displaced at this time, the arc surface of the arc-shaped limiting groove can extrude the lock tongue positioning piece 4210 out of the arc-shaped limiting groove.

[0069] Embodiment 2:

[0070] In the embodiment, the main difference from the embodiment 1 is that the setting mode of the locking piece 4200 is different.

[0071] In the embodiment, the locking piece 4200 also comprises a lock tongue positioning piece 4210; the fixed connection assembly 2100 is provided with a lock tongue cavity 2110 for radial movement of the lock tongue positioning piece 4210;

[0072] Further, the difference between the embodiment and the embodiment 1 is that the locking piece 4200 further comprises a locking threaded sleeve 4220 and a threaded unlocking elastic piece 4230, and correspondingly, the first limiting part 2210 is a first threaded locking part arranged on the outer surface of the driving assembly 2200; and the second limiting part is a second threaded locking part 4221 arranged on the inner side of the locking threaded sleeve 4220 and matched with the first threaded locking part. That is, in the embodiment, the axial restriction between the fixed connection assembly 2100 and the driving assembly 2200 is realized by the butt joint of threads and threads, so the positioning is more accurate and easy to control compared with the embodiment 1. However, the cooperation of threads needs to be realized by extruding the locking threaded sleeve 4220 by the lock tongue positioning piece 4210. In addition, in the embodiment, the transmission rod clutch end 2220 and the first limiting part 2210 are an integral molding structure, and the threads on the transmission rod clutch end 2220 and the threads of the first limiting part 2210 are structures with the same outer diameter, which can be formed by one-time machining, and the transmission rod clutch end 2220 is threadedly connected with the inner threads of the operating rod clutch end 3120 through the threads at the proximal end.

[0073] Preferably, in the embodiment, the locking threaded sleeve 4220 is a sleeve structure with a slotted side wall, and the threaded unlocking elastic piece 4230 is located in the slotted side wall and provides an extrusion force for expanding the slotted side wall; wherein the locking threaded sleeve 4220 can be a C-shaped sleeve structure, and the threaded unlocking elastic piece 4230 is arranged at the opening of the C-shaped sleeve, or the locking threaded sleeve 4220 can be a locking threaded sleeve 4220 spliced by two half-shell threaded sleeves, and the threaded unlocking elastic piece 4230 is correspondingly arranged between the two half-shell threaded sleeves.

[0074] Specifically, the sliding driving part 4110 is provided with an unlocking opening 4112, which can be a long hole arranged on the driving part 4110, and the hole diameter is greater than the minimum outer diameter of the lock tongue positioning piece 4210 but smaller than the maximum outer diameter of the lock tongue positioning piece 4210, so that part of the lock tongue positioning piece 4210 can extend out but not completely fall out.

[0075] Thus, when the sliding driving part 4110 is located at the initial position, the inner side wall thereof is fitted with the outer side wall of the fixed connection assembly 2100 to limit the radial movement of the lock tongue positioning piece 4210; the lock tongue positioning piece 4210 extrudes the locking threaded sleeve 4220, so that the threaded unlocking elastic piece 4230 is in a compressed state; the lock tongue positioning piece 4210 extrudes the outer surface of the locking threaded sleeve 4220 to offset the extrusion force of the threaded unlocking elastic piece 4230, so that the second threaded locking part 4221 is matched and locked with the first threaded locking part.

[0076] When the sliding driving part 4110 is located at the first preset position, the unlocking opening 4112 is aligned with the lock tongue cavity 2110, so that the lock tongue positioning member 4210 moves radially to disengage the first limiting part 2210 from the second limiting part. Under the action of the restoring force of the threaded unlocking elastic member 4230, the inside of the locking threaded sleeve 4220 is in a tendency to open, the first threaded locking and the second threaded locking part 4221 are disengaged, so that the driving assembly 2200 can move axially relative to the fixed connection assembly 2100.

[0077] In this article, the front, back, up, down and other orientation words are defined by the position of the parts in the drawing and the position of the parts relative to each other in the drawing, just to express the technical solution clearly and conveniently. It should be understood that the use of the orientation words should not limit the scope of the application.

[0078] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other.

[0079] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the right of the present application, so the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A drive control mechanism of a tissue fixation device, characterized by, The application relates to a driving control mechanism for a tissue fixation device, comprising: a supporting mechanism (2000) for a clamping mechanism (1000) of the tissue fixation device, wherein the supporting mechanism (2000) comprises a fixed connection assembly (2100) and a driving assembly (2200) capable of relative axial movement with the fixed connection assembly (2100), the fixed connection assembly (2100) is arranged outside the driving assembly (2200), and the driving assembly (2200) drives the opening and closing of the clamping mechanism (1000) by moving axially relative to the fixed connection assembly (2100); the driving assembly (2200) comprises a first limiting part (2210); a locking control assembly (4000) is arranged on the fixed connection assembly (2100), and the locking control assembly (4000) comprises a sliding piece (4100) and a locking piece (4200); the locking piece (4200) comprises a locking tongue positioning piece (4210); the fixed connection assembly (2100) is provided with a locking tongue cavity (2110) for the radial movement of the locking tongue positioning piece (4210); a sliding driving part (4110) of the sliding piece (4100) is slidingly arranged outside the fixed connection assembly (2100), and the sliding driving part (4110) is provided with an unlocking opening (4112); the locking tongue positioning piece (4210) comprises a second limiting part matched with the first limiting part (2210); when the sliding driving part (4110) is located at an initial position, the inner side wall of the sliding driving part (4110) is attached to the outer side wall of the fixed connection assembly (2100), the second limiting part is radially limited by the sliding driving part (4110), the second limiting part is at least partially in contact with the first limiting part (2210), so that the second limiting part is radially limited, and the locking piece (4200) limits the axial movement of the driving assembly (2200) relative to the fixed connection assembly (2100); when the sliding driving part (4110) is located at a first preset position, the unlocking opening (4112) is aligned with the locking tongue cavity (2110), so that the locking tongue positioning piece (4210) moves radially, the second limiting part can be radially separated from the first limiting part (2210), and the sliding driving part (4110) slides between the initial position and the first preset position, so that effective locking can be realized when the driving assembly (2200) slides to different positions, and the clamping mechanism (1000) is prevented from loosening.

2. The driving control mechanism according to claim 1, wherein the locking control assembly (4000) further comprises an unlocking driving piece (4300) connected with the sliding driving part (4110) and used for providing a driving force towards the first preset position to the sliding driving part (4110); and the sliding piece (4100) further comprises an elastic reset part (4120) used for applying a biasing force towards the initial position to the sliding driving part (4110) during the sliding of the sliding driving part (4110) from the initial position to the first preset position. ​ ​ ​ ​ ​ ​ ​ 3. The drive control mechanism according to claim 2, wherein the unlocking drive member (4300) is a pull wire, the first preset position is located proximally to the initial position, and the elastic reset portion (4120) is an elastic compression member arranged proximally to the sliding drive portion (4110), and a proximal end of the elastic reset portion (4120) is fixed axially relative to the fixed connection assembly (2100).

4. The drive control mechanism according to claim 3, wherein the locking control assembly (4000) further comprises a limiting sleeve (4400) connected with the fixed connection assembly (2100), and the limiting sleeve (4400) is provided with a limiting clamping portion (4410) matched with the proximal end of the elastic reset portion (4120) to limit axial movement of the proximal end of the elastic reset portion (4120).

5. The drive control mechanism according to claim 3, wherein the sliding drive portion (4110) is provided with a connecting hole (4111) in a double-hole structure for the unlocking drive member (4300) to pass in and out.

6. The drive control mechanism according to claim 2, wherein the unlocking drive member (4300) is a push rod, the first preset position is located distally to the initial position, and the elastic reset portion (4120) is an elastic stretching member arranged proximally to the sliding drive portion (4110), and a proximal end of the elastic reset portion (4120) is fixed axially relative to the fixed connection assembly (2100).

7. The drive control mechanism according to claim 1, wherein the first limiting portion (2210) is a plurality of arc-shaped grooves arranged axially along the drive assembly (2200); and the lock tongue positioning member (4210) is in a spherical or cylindrical structure, and an end portion of the lock tongue positioning member (4210) is a second limiting portion matched with the arc-shaped grooves.

8. The drive control mechanism according to claim 1, wherein the first limiting portion (2210) is a first threaded locking portion arranged on an outer surface of the drive assembly (2200); the locking member (4200) further comprises a locking threaded sleeve (4220) and a threaded unlocking elastic member (4230), and the second limiting portion is a second threaded locking portion (4221) arranged inside the locking threaded sleeve (4220) and matched with the first threaded locking portion; the locking threaded sleeve (4220) is a sleeve structure with a slotted side wall, and the threaded unlocking elastic member (4230) is located in the slotted side wall and provides an extrusion force to expand the slotted side wall; when the sliding drive portion (4110) is located at the initial position, the lock tongue positioning member (4210) extrudes an outer surface of the locking threaded sleeve (4220) to counteract the extrusion force of the threaded unlocking elastic member (4230), so that the second threaded locking portion (4221) is locked in cooperation with the first threaded locking portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 9. A tissue fixation device, comprising: The drive control mechanism comprises a clamping mechanism (1000), a clutch mechanism and a drive control mechanism as claimed in any one of claims 1-8.

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