Valve forceps holder

Abstract

The invention discloses a valve forceps holder which comprises a fixing seat, a clamping assembly, a driving assembly, a locking piece and an elastic piece. The clamping assembly comprises two near-end arms and two far-end arms, and the two near-end arms are used for being matched with the two far-end arms respectively so as to clamp the valve leaflet. The driving assembly comprises a driving rod and two connecting arms, and the driving rod is used for driving the two connecting arms to rotate so as to drive the two far-end arms to get close to each other to be folded or get away from each other to be unfolded. The locking piece can slide between a first position and a second position in the axial direction of the driving rod so as to clamp the driving rod and loosen the driving rod. The elastic piece drives the locking piece to move from the second position to the first position. According to the invention, the locking reliability can be improved.

Description

Technical Field

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

[0002] Surgical repair of body tissues usually involves clamping the tissue to improve the closing function. When the tissue to be repaired is a valve, the valve can be clamped by a clip to improve the valve closing function. Taking the common mitral valve repair as an example, the mitral valve is a part of the heart, located between the left atrium and the left ventricle. Blood is injected from the left atrium into the left ventricle. When the left ventricle contracts to pump blood into the whole body, the mitral valve closes to prevent the blood from being pumped back into the left atrium. In some patients, due to genetic malformation, disease or injury, the mitral valve cannot close properly, resulting in a condition called regurgitation, that is, blood is pumped into the atrium every time the myocardium contracts.

[0003] Mitral insufficiency is one of the most common valve lesions today. The main causes include mitral annulus dilation, chordae tendineae insufficiency, mitral valve mucoid degeneration, leaflet prolapse, rheumatic valvular heart disease, ischemic lesions, etc. Mitral valve direct vision plasty and artificial valve replacement are the most effective methods for treating mitral insufficiency. However, since the operation requires extracorporeal circulation technology support, it brings relatively large trauma to the human body. For elderly patients and patients with more complications, there are quite high complications and mortality rates. Therefore, in recent years, through the exploration of mitral valve repair technology, the main interventional treatment method is valve clip application. The valve clip is sent to the vicinity of the mitral valve through a specific path, and the free edges of the anterior and posterior leaflets are clamped and fixed, so that the leaflets are well opposed at the end of systole, reducing regurgitation.

[0004] As an implanted part, the valve clip applicator itself must have a safe locking ability; at present, the locking methods of the clips in the related technologies are mostly lever type, screw type and sleeve type, and these several locking methods all have the risk of locking failure, and the locking reliability is poor. Summary of the Invention

[0005] In view of the above defects or deficiencies in the prior art, the present invention provides a valve clip applicator to improve the locking reliability.

[0006] One aspect of the present invention provides a valve clip applicator, comprising: a fixed seat; a clamping assembly including two proximal arms and two distal arms, the proximal arms being connected to the fixed seat, the distal arms being rotatably connected to the fixed seat, and the two proximal arms being respectively adapted to cooperate with the two distal arms to clamp a valve leaflet between the proximal arms and the distal arms; a driving assembly including a driving rod and two connecting arms, one ends of the two connecting arms being rotatably connected to the two distal arms respectively, the other ends of the two connecting arms being rotatably connected to the driving rod, the driving rod being connected to the fixed seat and capable of moving axially relative to the fixed seat to drive the two connecting arms to rotate so as to drive the two distal arms to approach each other for retraction or move away from each other for deployment; a locking member slidably connected to the fixed seat and sleeved on the driving rod, the locking member being capable of sliding between a first position and a second position along the axial direction of the driving rod, in the first position, the locking member clamps the driving rod to prevent the driving rod from moving, and in the second position, the locking member releases the driving rod to allow the driving rod to move; and an elastic member connecting the fixed seat and the locking member, the elastic member urging the locking member to move from the second position to the first position.

[0007] In some embodiments, the locking member includes a first movable block and a second movable block, the first movable block being movably connected to the second movable block; wherein, when the locking member moves from the first position to the second position, the first movable block and the second movable block move away from each other to release the driving rod, and when the locking member moves from the second position to the first position, the first movable block and the second movable block move closer to each other to clamp the driving rod.

[0008] In some embodiments, the driving rod has a conical surface; in the first position, both the first movable block and the second movable block abut against the conical surface; wherein, the distance between the axis and the generatrix of the conical surface gradually decreases from the distal end to the proximal end.

[0009] In some embodiments, the first movable block includes a first clamping surface, the second movable block includes a second clamping surface opposite to the first clamping surface, and both the first clamping surface and the second clamping surface abut against the conical surface.

[0010] In some embodiments, when the locking member moves from the first position to the second position, the conical surface drives the first movable block and the second movable block to move away from each other.

[0011] In some embodiments, the fixed seat is provided with a receiving groove and a sliding groove, the driving rod is slidably disposed in the sliding groove and passes through the receiving groove, and the locking member is disposed in the receiving groove; wherein, the receiving groove has two first inclined surfaces disposed opposite to each other, the first movable block further includes a second inclined surface, and the second inclined surface and the first clamping surface are respectively located on opposite sides of the first movable block; the second movable block further includes a third inclined surface, and the third inclined surface and the second clamping surface are respectively located on opposite sides of the second movable block, and the second inclined surface and the third inclined surface are respectively slidably connected to the two first inclined surfaces.

[0012] In some embodiments, the elastic member is disposed in the receiving groove, and the driving rod passes through the elastic member; wherein, one end of the elastic member abuts against the fixed seat along the axial direction of the driving rod, and the other end abuts against the first movable block and the second movable block.

[0013] In some embodiments, the first movable block includes a first main body portion and a first protruding portion, the first clamping surface and the second inclined surface are respectively formed on opposite sides of the first main body portion, and the first main body portion further forms a first groove; the second movable block includes a second main body portion and a second protruding portion, the second clamping surface and the third inclined surface are formed on opposite sides of the second main body portion, and the second main body portion forms a second groove; wherein, the first protruding portion extends into the second groove and is slidably connected to the second groove, and the second protruding portion extends into the first groove and is slidably connected to the first groove.

[0014] In some embodiments, at least one of the conical surface, the first clamping surface, the second clamping surface, the first inclined surface, the second inclined surface and the third inclined surface is provided with a concavo-convex structure.

[0015] In some embodiments, the valve clamp further includes: a pull ring, connected to the locking member, for driving the locking member to move from the first position to the second position.

[0016] In some embodiments, the driving assembly further includes a fixed block, the distal end of the driving rod is fixed to the fixed block, and the other ends of the two connecting arms are rotatably connected to the fixed block.

[0017] The valve clamp provided by the present invention has at least the following beneficial effects: By moving the locking member between the first position and the second position, at the second position, the locking member releases the driving rod to drive the driving rod to move to drive the clamping assembly to clamp the valve leaflet, and at the first position, the driving rod is prevented from moving by the locking member so that the clamping assembly maintains the state of clamping and locking the valve leaflet, and the locking is realized by using the structure of the valve clamp itself, which greatly reduces the risk of locking failure and improves the locking reliability.

[0018] The distance between the axis and the generatrix of the conical surface gradually increases from the distal end to the proximal end, making the conical surface an inverted cone. The outer diameter of the conical surface is larger closer to the proximal end. When the locking member is in the first position to lock the drive rod, the resistance of the drive rod moving towards the distal end is greater when it is impacted by blood flow. That is, the two movable blocks can "clamp" the drive rod to prevent the drive rod from moving towards the distal end, greatly reducing the possibility of the two distal arms opening. Thus, the two distal arms can be firmly cooperated with the two proximal arms to clamp the valve leaflets, further improving the locking reliability.

[0019] Since the first convex portion extends into the second groove and is slidably connected to the second groove, and the second convex portion extends into the first groove and is slidably connected to the first groove, the two movable blocks can move up and down simultaneously without separation, and the risk of locking failure is greatly reduced by ingeniously using its own structure instead of adding additional components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects, and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 Schematic diagram of the valve clip applicator in the implanted state provided by an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the valve clip applicator provided by an embodiment of the present invention; Figure 3 Cross-sectional schematic diagram of the valve clip applicator provided by an embodiment of the present invention, where the hatching is omitted for clear display; Figure 4 Partial structure schematic diagram of the valve clip applicator provided by an embodiment of the present invention, where the hatching is omitted for clear display; Figure 5 Exploded structure schematic diagram of the valve clip applicator provided by an embodiment of the present invention, where the drive rod is omitted; Figure 6 Partial structure schematic diagram of the valve clip applicator provided by an embodiment of the present invention; Figure 7 Partial exploded structure schematic diagram of the valve clip applicator provided by an embodiment of the present invention.

[0021] ICON: Valve clamp 100; Intervention tool 200; Valve leaflet 300; Fixed seat 10; Clamping assembly 20; Driving assembly 30; Locking member 40; Elastic member 50; Pull ring 60; Accommodating groove 11; Chute 12; Proximal arm 21; Distal arm 22; Driving rod 31; Connecting arm 32; Fixed block 33; Conical surface 311; First movable block 41; Second movable block 42; First clamping surface 411; Second clamping surface 421; First inclined surface 111; Second inclined surface 412; First convex portion 413; First groove 414; Third inclined surface 422; Second convex portion 423; Second groove 424; Axis L1; Generatrix L2. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention are also intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present invention to describe the acquisition modules, these acquisition modules should not be limited to these terms. These terms are only used to distinguish the acquisition modules from each other.

[0025] Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0026] It should be noted that the orientation terms such as "upper", "lower", "left" and "right" described in the embodiments of the present invention are described from the angles shown in the accompanying drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "on" or "under" another element, it can not only be directly formed "on" or "under" another element, but also be indirectly formed "on" or "under" another element through an intermediate element.

[0027] Surgical repair of body tissues usually involves clamping the tissues to improve the closing function. When the tissue to be repaired is a valve, the valve can be clamped by a clamp to improve the valve closing function. Taking the common mitral valve repair as an example, in the current related technologies, most of the locking methods of the clamp are lever type and screw type, both of which have the risk of locking failure and poor locking reliability.

[0028] 1. Lever locking method: The card and the central rod are locked by the friction between the card edge and the central rod. The card edge is easy to wear. After wear, the friction coefficient decreases, the frictional force decreases, and the risk of locking failure is relatively large.

[0029] 2. Screw locking method: When the large arm of the clamp moves, it causes multiple vibrations of the screw thread, which is likely to cause locking failure.

[0030] In view of this, the present invention provides a valve clamp 100, which uses the cooperation of the clamp's own structure to lock, greatly reducing the risk of locking failure.

[0031] The valve clamp 100 of the present invention can be used for mitral valve repair, tricuspid valve repair, etc. In the following embodiments, the valve clamp 100 is used for mitral valve repair as an example for illustration.

[0032] Refer to Figures 1 to 7 , an embodiment of the present invention provides a valve clamp 100, which is used to be implanted into the atrium through an intervention tool 200 (which can be an intervention catheter) to clamp the valve leaflet 300.

[0033] In the embodiment of the present invention, "proximal" refers to the side close to the operator, and "distal" refers to the side far from the operator. Relative to the mitral valve, the proximal refers to the atrial or upstream side of the valve leaflet 300, and the distal refers to the ventricular or downstream side of the valve leaflet 300.

[0034] The valve clamp 100 includes a fixed seat 10, a clamping assembly 20, a driving assembly 30, a locking member 40, and an elastic member 50.

[0035] The clamping assembly 20 includes two proximal arms 21 and two distal arms 22. The proximal arms 21 are connected to the fixed seat 10, and the distal arms 22 are rotatably connected to the fixed seat 10. The two proximal arms 21 are respectively used to cooperate with the two distal arms 22 to clamp the valve leaflet 300 between the proximal arms 21 and the distal arms 22.

[0036] Each proximal arm 21 can be a flexible and elastic element. The two proximal arms 21 have a deformation tendency to move away from each other toward the distal side, so that the two proximal arms 21 expand when released and cooperate with the distal arms 22 to clamp the valve leaflet 300. The two proximal arms 21 can be integrally formed. The proximal arm 21 can be a cutting spring arm.

[0037] The driving assembly 30 includes a driving rod 31 and two connecting arms 32. One end of each of the two connecting arms 32 is rotatably connected to the two distal arms 22 respectively, and the other end of each of the two connecting arms 32 is rotatably connected to the driving rod 31. The driving rod 31 is connected to the fixed seat 10 and can move axially relative to the fixed seat 10, for driving the two connecting arms 32 to rotate so as to drive the two distal arms 22 to approach each other for retraction or move away from each other for deployment.

[0038] The connecting arm 32 can be directly rotatably connected to the driving rod 31, or can be rotatably connected to the driving rod 31 through a fixing block 33.

[0039] As an example, referring to Figure 2 , the driving assembly 30 further includes a fixing block 33. The distal end of the driving rod 31 is fixed to the fixing block 33, and the other ends of the two connecting arms 32 are respectively rotatably connected to the fixing block 33. One end of each of the two connecting arms 32 can be rotatably connected to the two distal arms 22 respectively through pins, and the other end of each of the two connecting arms 32 can be rotatably connected to the fixing block 33 respectively through pins.

[0040] Exemplarily, the distal arm 22 can be a large arm, and the connecting arm 32 can be a small arm with a smaller size than the distal arm 22.

[0041] When the driving rod 31 moves axially relative to the fixed seat 10 towards the distal side, the two connecting arms 32 rotate to drive the two distal arms 22 to rotate away from each other for deployment. After deployment, the two distal arms 22 support the leaflet 300, that is, hold the leaflet 300. At the same time, the two proximal arms 21 are released, and due to the action of their own elastic force, the two proximal arms 21 move away from each other for deployment and cooperate with the two distal arms 22 respectively to clamp the leaflet 300.

[0042] The locking member 40 is slidably connected to the fixed seat 10 and sleeved on the driving rod 31. The locking member 40 can slide axially along the driving rod 31 between a first position and a second position. In the first position, the locking member 40 clamps the driving rod 31 to prevent the driving rod 31 from moving. In the second position, the locking member 40 releases the driving rod 31 to allow the driving rod 31 to move.

[0043] The locking member 40 clamping the driving rod 31 can prevent the driving rod 31 from moving through the friction force between them. The locking member 40 releasing the driving rod 31 can be that the friction force between them is not sufficient to prevent the driving rod 31 from moving relative to the locking member 40. The locking member 40 releasing the driving rod 31 can also be that there is a gap between them to enable the driving rod 31 to move freely relative to the locking member 40. That is to say, when the locking member 40 releases the driving rod 31, the two can be in contact or non-contact.

[0044] The elastic member 50 connects the fixed seat 10 and the locking member 40, and the elastic member 50 drives the locking member 40 to move from the second position to the first position.

[0045] The elastic member 50 connecting the fixed seat 10 and the locking member 40 may be such that one end of the elastic member 50 abuts against the fixed seat 10 and the other end abuts against the locking member 40. The elastic member 50 may be a spring, a spring sheet, etc.

[0046] The locking member 40 can be moved from the first position to the second position by an external force so that the locking member 40 releases the driving rod 31. For example, by connecting a pull ring 60 ( Figure 7 as shown) to the locking member 40, the pull ring 60 drives the locking member 40 to move from the first position to the second position. The pull ring 60 can be sleeved on the locking member 40. As an example, the first position may be closer to the distal side than the second position. Of course, if necessary, the first position can be designed to be closer to the proximal side than the second position.

[0047] When the locking member 40 moves from the first position to the second position and the locking member 40 releases the driving rod 31, the intervention tool 200 can be used to drive the driving rod 31 to move towards the distal side to deploy the two distal arms 22. At the same time, the two proximal arms 21 are deployed and cooperate with the two distal arms 22 respectively to clamp and fix the valve leaf 300. Then, the intervention tool 200 is used to drive the driving rod 31 to move towards the proximal side, so that the angles of the two distal arms 22 are reduced, that is, the two distal arms 22 are tightened, so that the proximal arms 21 and the distal arms 22 clamp the valve leaf 300. Then, the pull ring 60 is released, and the elastic member 50 drives the locking member 40 to move from the second position to the first position. The locking member 40 clamps the driving rod 31 to prevent the driving rod 31 from moving. Thus, the proximal arms 21 and the distal arms 22 firmly clamp the valve leaf 300. After that, the intervention tool 200 is withdrawn to complete the implantation of the valve clip device 100.

[0048] By moving the locking member 40 between the first position and the second position, in the second position, the locking member 40 releases the driving rod 31 to drive the driving rod 31 to move and drive the clamping assembly 20 to clamp the valve leaf 300. In the first position, the locking member 40 prevents the driving rod 31 from moving so that the clamping assembly 20 maintains the state of clamping and locking the valve leaf 300. The locking is realized by using the structure of the valve clip device 100 itself, which greatly reduces the risk of locking failure and improves the locking reliability.

[0049] In some embodiments, the locking member 40 includes a first movable block 41 and a second movable block 42, and the first movable block 41 is movably connected to the second movable block 42; wherein, when the locking member 40 moves from the first position to the second position, the first movable block 41 and the second movable block 42 move away from each other to release the driving rod 31, and when the locking member 40 moves from the second position to the first position, the first movable block 41 and the second movable block 42 move closer to each other to clamp the driving rod 31.

[0050] The first movable block 41 and the second movable block 42 approach each other along the radial direction of the drive rod 31 to clamp the drive rod 31 and prevent the drive rod 31 from moving. The first movable block 41 and the second movable block 42 move away from each other along the radial direction of the drive rod 31 to release the drive rod 31, allowing the drive rod 31 to move so as to deploy or tighten the two distal arms 22.

[0051] The locking member 40 clamps and releases the drive rod 31 by the mutual approach or separation of the two movable blocks, which can improve the reliability of restricting the movement of the drive rod.

[0052] In some embodiments, the drive rod 31 has a conical surface 311 ( Figure 6 as shown). In the first position, both the first movable block 41 and the second movable block 42 are in contact with the conical surface 311 to clamp the drive rod 31. Wherein, the distance between the axis L1 and the generatrix L2 of the conical surface 311 gradually increases from the distal end to the proximal end.

[0053] The distance between the axis L1 and the generatrix L2 of the conical surface 311 gradually increases from the distal end to the proximal end, so that the conical surface 311 is an inverted cone, and the outer diameter of the conical surface 311 is larger closer to the proximal end. When the locking member 40 is in the first position and locks the drive rod 31, the resistance of the drive rod 31 moving towards the distal end is greater when it is impacted by blood flow, that is, the two movable blocks can "lock" the drive rod 31 to prevent the drive rod 31 from moving towards the distal end, greatly reducing the possibility of the two distal arms 22 opening. Thus, the two distal arms 22 can be firmly cooperated with the two proximal arms 21 to clamp the valve leaflets, further improving the locking reliability.

[0054] In some embodiments, the first movable block 41 includes a first clamping surface 411, and the second movable block 42 includes a second clamping surface 421 opposite to the first clamping surface 411. Both the first clamping surface 411 and the second clamping surface 421 are in contact with the conical surface. When the locking member 40 moves from the first position to the second position, the conical surface 311 drives the first movable block 41 and the second movable block 42 to move away from each other.

[0055] When the locking member 40 moves from the first position to the second position, the conical surface 311 drives the first movable block 41 and the second movable block 42 to move away from each other to release the drive rod 31. At this time, both the first clamping surface 411 and the second clamping surface 421 may be in contact with the conical surface of the drive rod 31, but there is almost no clamping force.

[0056] By having the conical surface 311 on the drive rod 31, the drive rod 31 itself is used to drive the first movable block 41 and the second movable block 42 to move away from each other without adding too many components, thereby further reducing the risk of locking failure.

[0057] In some embodiments, continue to refer to Figure 6, the fixed seat 10 is provided with a receiving groove 11 and a sliding groove 12. The driving rod 31 is slidably disposed in the sliding groove 12 and passes through the receiving groove 11. The locking member 40 is disposed in the receiving groove 11. Among them, the receiving groove 11 has two first inclined surfaces 111 disposed opposite to each other. The first movable block 41 further includes a second inclined surface 412. The second inclined surface 412 and the first clamping surface 411 are respectively located on opposite sides of the first movable block 41. The second movable block 42 further includes a third inclined surface 422. The third inclined surface 422 and the second clamping surface 421 are respectively located on opposite sides of the second movable block 42. The second inclined surface 412 and the third inclined surface 422 are respectively slidably connected to the two first inclined surfaces 111.

[0058] When the locking member 40 moves from the first position to the second position, the conical surface 311 drives the first movable block 41 and the second movable block 42 to slide along the first inclined surface 111 and move away from each other. Thus, the smoothness of the movement of the two movable blocks can be improved.

[0059] Exemplarily, the distance between the two first inclined surfaces 111 gradually increases from the distal end to the proximal end.

[0060] Thus, the risk of loosening of the locking member 40 in the first position can be reduced, and the first movable block 41 and the second movable block 42 can clamp the driving rod 31 more reliably.

[0061] The angle between the first inclined surface 111 and the axis L1 of the conical surface 311 can be equal to the angle between the axis L1 of the conical surface 311 and the generatrix L2, can also be greater than the angle between the axis L1 of the conical surface 311 and the generatrix L2, or can also be less than the angle between the axis L1 of the conical surface 311 and the generatrix L2.

[0062] As an example, the angle between the first inclined surface 111 and the axis L1 of the conical surface 311 is less than the angle between the axis L1 of the conical surface 311 and the generatrix L2. The pull ring 60 pulls the movable block (such as the first movable block 41) to move proximally. After the movable block reaches the second position, the driving rod 31 can move proximally or distally, so as to release and contract the clamp. At this time, the pull ring 60 is always in a tightened state (it is necessary to overcome the elastic force of the elastic member 50). When the pull ring 60 is released, the movable block is bounced up under the elastic action of the elastic member 50, and the driving rod 31 is locked, so as to lock the clamp.

[0063] In some embodiments, the elastic member 50 is disposed in the receiving groove 11, and the driving rod 31 passes through the elastic member 50. Among them, one end of the elastic member 50 in the axial direction of the driving rod 31 abuts against the fixed seat 10, and the other end abuts against the first movable block 41 and the second movable block 42.

[0064] The elastic member 50 is disposed in the receiving groove 11, which can save space occupancy and contribute to the miniaturization of the valve clamp.

[0065] In some embodiments, the first movable block 41 includes a first main body portion and a first convex portion 413. A first clamping surface 411 and a second inclined surface 412 are respectively formed on opposite sides of the first main body portion along, and a first groove 414 is further formed in the first main body portion; the second movable block 42 includes a second main body portion and a second convex portion 423. A second clamping surface 421 and a third inclined surface 422 are formed on opposite sides of the second main body portion, and a second groove 424 is formed in the second main body portion ( Figure 6 as shown); wherein, the first convex portion 413 extends into the second groove 424 and is slidably connected to the second groove, and the second convex portion 423 extends into the first groove 414 and is slidably connected to the first groove 414.

[0066] Since the first convex portion 413 extends into the second groove 424 and is slidably connected to the second groove, and the second convex portion 423 extends into the first groove 414 and is slidably connected to the first groove 414, the two movable blocks can move up and down simultaneously without separation, and the structure itself is cleverly utilized instead of adding extra components, thereby greatly reducing the risk of locking failure.

[0067] In some embodiments, at least one of the conical surface 311, the first clamping surface 411, the second clamping surface 421, the first inclined surface 111, the second inclined surface 412, and the third inclined surface 422 is provided with a concavo-convex structure. The concavo-convex structure can be formed into a serrated shape, a threaded shape, etc.

[0068] The concavo-convex structure can increase the frictional force to increase the locking force.

[0069] The above description is only the preferred embodiments of the present invention. Those skilled in the art should understand that the disclosed scope of the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present invention.

Claims

1. A valve clamp, characterized in that, Comprising: A fixed seat; A clamping assembly, including two proximal arms and two distal arms, the proximal arms being connected to the fixed seat, the distal arms being rotatably connected to the fixed seat, and the two proximal arms being respectively used to cooperate with the two distal arms to clamp a valve leaflet between the proximal arms and the distal arms; A driving assembly, including a driving rod and two connecting arms, one ends of the two connecting arms being respectively rotatably connected to the two distal arms, the other ends of the two connecting arms being both rotatably connected to the driving rod, the driving rod being connected to the fixed seat and capable of axially moving relative to the fixed seat, for driving the two connecting arms to rotate to drive the two distal arms to approach each other to retract or move away from each other to expand; A locking member, slidably connected to the fixed seat and sleeved on the driving rod, the locking member being capable of sliding between a first position and a second position along the axial direction of the driving rod, in the first position, the locking member clamps the driving rod to prevent the driving rod from moving, and in the second position, the locking member releases the driving rod to allow the driving rod to move; An elastic member, connecting the fixed seat and the locking member, the elastic member driving the locking member to move from the second position to the first position.

2. The valve clip according to claim 1, characterized in that The locking member includes a first movable block and a second movable block, the first movable block being movably connected to the second movable block; Wherein, when the locking member moves from the first position to the second position, the first movable block and the second movable block move away from each other to release the driving rod, and when the locking member moves from the second position to the first position, the first movable block and the second movable block move closer to each other to clamp the driving rod.

3. The valve clip according to claim 2, characterized in that The driving rod has a conical surface; In the first position, the first movable block and the second movable block are in contact with the conical surface; Wherein, the distance between the axis and the generatrix of the conical surface gradually increases from the distal end to the proximal end.

4. The valve clip according to claim 3, characterized in that The first movable block includes a first clamping surface, the second movable block includes a second clamping surface opposite to the first clamping surface, and both the first clamping surface and the second clamping surface are in contact with the conical surface; When the locking member moves from the first position to the second position, the conical surface drives the first movable block and the second movable block to move away from each other.

5. The valve clip according to claim 4, characterized in that The fixed seat is provided with a receiving groove and a sliding groove, the driving rod is slidably disposed in the sliding groove and passes through the receiving groove, and the locking member is disposed in the receiving groove; Wherein, the receiving groove has two first inclined surfaces arranged oppositely, the first movable block further includes a second inclined surface, and the second inclined surface and the first clamping surface are respectively located on opposite sides of the first movable block; The second movable block further includes a third inclined surface, the third inclined surface and the second clamping surface are respectively located on opposite sides of the second movable block, and the second inclined surface and the third inclined surface are respectively slidably connected to the two first inclined surfaces.

6. The valve clamp according to claim 5, wherein The elastic member is disposed in the receiving groove, and the driving rod passes through the elastic member; Wherein, one end of the elastic member in the axial direction of the driving rod abuts against the fixed seat, and the other end abuts against the first movable block and the second movable block.

7. The valve clamp according to claim 5, wherein The first movable block includes a first main body portion and a first convex portion, the first clamping surface and the second inclined surface are respectively formed on opposite sides of the first main body portion, and the first main body portion further forms a first groove; The second movable block includes a second main body portion and a second convex portion, the second clamping surface and the third inclined surface are respectively formed on opposite sides of the second main body portion, and the second main body portion forms a second groove; Wherein, the first convex portion extends into the second groove and is slidably connected to the second groove, and the second convex portion extends into the first groove and is slidably connected to the first groove.

8. The valve clamp according to claim 5, wherein At least one of the conical surface, the first clamping surface, the second clamping surface, the first inclined surface, the second inclined surface and the third inclined surface is provided with a concavo-convex structure.

9. The valve clip applicator according to claim 1, wherein The valve clamp further includes: A pull ring, connected to the locking member, for driving the locking member to move from the first position to the second position.

10. The valve clamp according to claim 1, wherein The driving assembly further includes a fixed block, the distal end of the driving rod is fixed to the fixed block, and the other ends of the two connecting arms are rotatably connected to the fixed block.

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