Valve clipping device

Abstract

The embodiment of the present invention provides a valve clamping device. It includes a clamping mechanism and a control component, the clamping mechanism includes: an upper clamping arm, a lower clamping arm, a connecting rod, a fixed seat and a base; the control component includes: a fixed seat connector, a locking sleeve and a base connector; the base has a locking groove extending in the axial direction; the fixed seat is connected to an elastic locking member, the elastic locking member extends in the axial direction and extends into the locking groove; the distal end of the elastic locking member has a locking portion that can be elastically opened radially and locked with the locking groove; the locking sleeve is sleeved on the fixed seat connector and the elastic locking member to converge the locking portion and make the elastic locking member axially engaged with the fixed seat connector, the locking sleeve moves axially to release the locking portion and release the axial engagement between the fixed seat connector and the elastic locking member; the locking sleeve can also keep the base connector engaged or disengaged with the base. The embodiment of the present invention can reduce the difficulty of operation and is conducive to improving the success rate of clamping.

Description

Technical Field

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

[0002] Edge-to-edge repair is an ancient yet young repair technique. Compared with surgical edge-to-edge repair, transcatheter edge-to-edge repair is less invasive and more safe.

[0003] Although the existing transcatheter edge-to-edge repair technology has achieved great success, the key instrument used, the valve clipping device, still has the problems of high clipping failure rate and complex operation. Summary of the invention

[0004] The purpose of the embodiment of the present invention is to provide a valve clamping device, aiming to improve the convenience of the valve leaflet clamping operation of the valve clamping device and improve the clamping success rate.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a valve clamping device, comprising: a clamping mechanism and a control component;

[0006] The clamping mechanism comprises an upper clamping arm, a lower clamping arm, a connecting rod, a fixing seat and a base; the upper clamping arm and the lower clamping arm are respectively connected to the base, the connecting rod is connected to the lower clamping arm and the fixing seat; the base has a locking groove extending in the axial direction; the fixing seat comprises: a seat body and an elastic locking piece, the seat body is connected to the elastic locking piece, the elastic locking piece extends in the axial direction and penetrates into the base, the distal end of the elastic locking piece has a locking portion that can be elastically opened in the radial direction, and the locking portion can be locked in cooperation with the locking groove when opened;

[0007] The control assembly comprises: a fixed seat connecting piece, a locking sleeve and a base connecting piece; the fixed seat connecting piece is coaxially arranged with the elastic locking piece and radially engaged with each other, the locking sleeve is sleeved on the elastic locking piece and the fixed seat connecting piece to gather the locking part and make the elastic locking piece axially engaged with the fixed seat connecting piece, and the locking sleeve can also move axially relative to the fixed seat connecting piece and the elastic locking piece to release the locking part and release the engagement between the fixed seat connecting piece and the elastic locking piece;

[0008] The distal end of the base connector is snap-fitted with the base, and the locking sleeve is movably inserted into the base connector and the base. When the locking sleeve is inserted into the base, the base connector and the base can be kept snap-fitted, and when the locking sleeve is withdrawn from the base, the base connector can be released from the base.

[0009] As an embodiment, the elastic locking member includes a locking tube body, and the locking portion is a plurality of locking teeth arranged on the locking tube body. The plurality of locking teeth can be gathered in the locking sleeve and can be elastically opened and locked with the locking groove in a natural state.

[0010] As an embodiment, the locking groove is a thread groove, and the locking tooth can be embedded in the thread groove to lock the elastic locking member and the base;

[0011] Optionally, the plurality of locking teeth are arranged in pairs in accordance with the thread direction and a plurality of pairs are spaced apart; wherein the movable ends of each pair of locking teeth are arranged adjacent to each other.

[0012] As an embodiment, the elastic locking member further comprises: at least one elastic locking piece connected to the proximal end of the locking tube body and extending axially, and the locking tube body is vertically arranged on the seat body;

[0013] Correspondingly, the fixed seat connecting member is a fixed seat connecting rod, and its distal end extends into the elastic locking plate; a slot is provided on the elastic locking plate, and a block is provided on the peripheral wall of the fixed seat connecting rod, and the block is adapted to the slot so that the fixed seat connecting rod and the fixed seat are axially engaged; the elastic locking plate can be elastically opened in a natural state to allow the block to escape from the slot.

[0014] As an embodiment, the fixing seat connecting rod includes a first rod segment and a second rod segment connected in sequence from the proximal end to the distal end; the diameter of the first rod segment is larger than the diameter of the second rod segment, and the block is protruding from the peripheral wall of the second rod segment.

[0015] As an embodiment, a fixing hole is provided in the center of the seat body, and the locking tube body extends into the fixing hole and is fixed to the seat body; the elastic locking piece also includes: an inner core; the inner core is inserted into the locking tube body in a tight fit manner.

[0016] As an embodiment, the locking groove is a thread groove, and the outer wall of the elastic locking plate is provided with locking teeth, and the locking teeth can be embedded in the thread groove to lock the elastic locking plate and the base.

[0017] As an embodiment, the base connector includes a proximal connecting tube section and a plurality of connecting plates axially extending from the distal end of the proximal connecting tube section, a buckle is provided on the outer side of the bottom end of the connecting plate, and a base slot matched with the buckle is provided on the side wall of the base, so that the base connector is axially engaged with the base and can drive the base to move axially; the connecting plate elastically retracts inwardly in a natural state so that the connecting plate can penetrate into the base and move axially relative to the base, and when the locking sleeve is penetrated between the plurality of connecting plates, the connecting plate can be opened so that the buckle is inserted into the base slot, and when the locking sleeve withdraws from the base connector, the connecting plate can elastically return to a retracted state and drive the buckle to disengage from the base slot.

[0018] As an embodiment, the lower clamping arm includes an H-shaped supporting connecting arm and an expansion wing;

[0019] The supporting connecting arms are rotatably connected to the base and the connecting rod respectively;

[0020] The expansion wing is fixedly arranged on a side of the supporting connecting arm facing the upper clamping arm; the expansion wing is a hollow plate-like structure and has a clamping surface inclined toward the upper clamping arm;

[0021] Optionally, the wing panels on both sides of the expansion wing have a clamping surface that is opened at an obtuse angle along the circumferential direction, and the angle range of the obtuse angle is 95° to 175°.

[0022] As an embodiment, a supporting surface inclined toward the fixing seat is formed at the connecting section of the two side wings of the expansion wing;

[0023] Optionally, the expansion wing gradually increases from the inner end to the outer end.

[0024] As an embodiment, the upper clamping arm comprises: a clamping portion and a connecting portion which are integrally connected;

[0025] The clamping part is evenly provided with a plurality of through holes, and the two sides of the clamping part are respectively provided with a plurality of barbs;

[0026] The connecting portion is provided with a weight-reducing hole.

[0027] It can be seen from the above technical solutions that the embodiments of the present invention have at least the following advantages and positive effects:

[0028] In the valve clamping device of the embodiment of the present invention, the fixing seat has an elastic locking piece, and the fixing seat connecting piece and the elastic locking piece can be axially clamped or released through the locking sleeve; the elastic locking piece has a locking part at the distal end, and the locking sleeve can be used to gather the locking part so as to facilitate the relative movement of the base and the fixing seat, and can release the locking part so that the locking part and the locking groove of the base are locked together, thereby locking the valve clip; the connection and release of the base connecting piece and the base can also be synchronously controlled through the locking sleeve, so that the position between the base and the fixing seat can be conveniently controlled to adjust the opening and closing state of the valve clip. Therefore, the valve clamping device of this embodiment can not only conveniently adjust the opening and closing state, but also conveniently release the control component from the clamping mechanism by withdrawing the locking sleeve, which is simple and convenient to operate, and is conducive to improving the synthesis efficiency of the valve clip. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. It can be understood that the drawings in the following description are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of a valve clamping device provided by an embodiment of the present invention in an open state;

[0031] Figure 2 A schematic structural diagram of a valve clamping device in a clamping state provided by an embodiment of the present invention;

[0032] Figure 3a A schematic structural diagram of a base of a valve clamping device provided in an embodiment of the present invention;

[0033] Figure 3b for Figure 3a A schematic cross-sectional structure diagram of the base shown;

[0034] Figure 4 A schematic structural diagram of a base connector of a valve clamping device provided in an embodiment of the present invention;

[0035] Figure 5a A schematic diagram of the connection structure between the fixing seat connecting rod and the fixing seat of the valve clamping device provided in an embodiment of the present invention;

[0036] Figure 5b A schematic structural diagram of the release state of the fixing seat connecting rod and the fixing seat of the valve clamping device provided by an embodiment of the present invention;

[0037] Figure 5c A schematic cross-sectional structure diagram of a connection structure between a fixing seat connecting rod and a fixing seat of a valve clamping device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] It should be noted that, unless otherwise expressly specified, the terms "connected", "connected", etc. 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0041] In the description of the present invention, it should be noted that in the field of interventional medical devices, the proximal end refers to the end closer to the operator, while the distal end refers to the end farther from the operator; the axial direction refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device in the natural state. The above definitions are only for the convenience of expression and cannot be understood as limitations of the present invention.

[0042] See also Figure 1-2 , Figure 3a to Figure 3b and Figure 5a to 5c As shown, an embodiment of the present invention provides a valve clamping device for interventional repair of a valve. The valve clamping device of this embodiment mainly includes: a clamping mechanism and a control component.

[0043] The clamping mechanism includes an upper clamping arm 1, a lower clamping arm 2, a connecting rod 3, a fixed seat 4 and a base 5. The upper clamping arm 1 and the lower clamping arm 2 are connected to the base 5 respectively, and the connecting rod 3 is connected to the lower clamping arm 2 and the fixed seat 4. The base 5 has a locking groove 51 extending axially. The fixed seat 4 includes: a seat body 41 and an elastic locking member 42, and the seat body 41 is connected to the elastic locking member 42. The elastic locking member 42 extends axially and penetrates into the base 5. The lower clamping arm 2, the connecting rod 3, the fixed seat 4 and the base 5 form a crank slider mechanism, and together with the upper clamping arm 1 form a flap clamp, which is used as an implant for clamping the valve leaflets. The elastic locking member 42 has a locking portion at the distal end that can be elastically opened radially, and when the locking portion is opened, it can cooperate with the locking groove 51 to lock, thereby locking the clamping state of the flap clamp.

[0044] The control assembly includes: a fixed seat connector, a locking sleeve 7 and a base connector 8. The locking sleeve 7 is used to assist in controlling the movement, locking state and unlocking and releasing operation of the flap clip. The locking sleeve 7 can be made of medical plastic.

[0045] The fixed seat connector is coaxially arranged with the elastic locking member 42 and radially engaged. The locking sleeve 7 is sleeved on the elastic locking member 42 and the fixed seat connector to converge the locking portion and make the elastic locking member 42 axially engaged with the fixed seat connector, so as to drive the fixed seat 4 to move axially relative to the base 5 through the fixed seat connector to adjust the opening and closing and clamping state of the petal clamp. The locking sleeve 7 can also move axially relative to the fixed seat connector and the elastic locking member 42 to release the locking portion and release the engagement between the fixed seat connector and the elastic locking member 42. After the locking portion is released, it can be elastically opened and locked with the locking groove 51 to lock the state of the petal clamp. The release of the engagement between the fixed seat connector and the elastic locking member 42 can achieve the release of the two, after which the fixed seat connector can be withdrawn.

[0046] The distal end of the base connector 8 is engaged with the base 5, and the locking sleeve 7 is movably inserted into the base connector 8 and the base 5. The locking sleeve 7 can move axially relative to the base connector 8 and the base 5. When the locking sleeve 7 is inserted into the base 5, the base connector 8 can be kept engaged with the base 5. When the locking sleeve 7 is withdrawn from the base 5, the base connector 8 can be released from the base, and the base connector 8 can be withdrawn thereafter.

[0047] The lower clamp arm 2 is rotatably connected to the connecting rod 3 via the lower clamp arm pin 201. The base 5 is provided with a pin hole 53, the lower clamp arm 2 is rotatably connected to the base 5 via the base connection pin 501 disposed in the pin hole 53, and the connecting rod 3 is rotatably connected to the fixing seat 4 via the fixing seat pin 401. The lower clamp arm 2 and the base 5, the lower clamp arm 2 and the connecting rod 3, and the connecting rod 3 and the fixing seat 4 form a revolving pair respectively. It can be understood that the above-mentioned pin connection method can also be replaced by rivets, which is not specifically limited here.

[0048] Please continue reading Figure 5a to Figure 5c The fixed seat 4 may include: a seat body 41, an elastic locking piece 42 and an inner core 43. The elastic locking piece 42 includes a locking tube body 421 and at least one elastic locking piece 422 connected to the proximal end of the locking tube body 421 and extending in the axial direction. The locking tube body 421 is vertically arranged on the seat body 41. A fixing hole is provided in the center of the seat body 41, and the locking tube body 421 extends into the fixing hole and is fixed to the seat body 41. The inner core 43 is inserted into the locking tube body 421 in a tight fit. The distal end surfaces of the inner core 43 and the locking tube body 421 coincide with the distal end surface of the seat body 41. The locking tube body 421 can be fixedly connected to the seat body 41 by welding or bonding. The density of the inner core 43 can be less than the density of the locking tube body 421. The inner core 43 can improve the strength of the elastic locking piece and is conducive to reducing the overall weight of the elastic locking piece.

[0049] The locking part is a plurality of locking teeth 4211 disposed on the locking tube body 421. The plurality of locking teeth 4211 can be gathered in the locking sleeve 7, so as to facilitate the axial movement of the fixing seat 4 relative to the base 5. The plurality of locking teeth 4211 can be elastically opened in a natural state and locked with the locking groove 51, so that the flap clip maintains a locked state and realizes the clamping of the flap leaflets.

[0050] The locking groove 51 can be a thread groove, and the locking teeth 4222 can be embedded in the thread groove, and the friction between the locking teeth 4222 and the thread groove is used to reliably lock the locking elastic locking member 42 and the base 5. Optionally, multiple locking teeth 4211 are arranged in pairs in accordance with the thread direction and are distributed in multiple pairs at intervals. Among them, multiple locking teeth 4222 can be arranged in multiple pairs at intervals along the circumferential direction and aligned along the axial direction. Among them, the movable ends of each pair of locking teeth 4222 are arranged in close proximity to each other, that is, the movable ends of each pair of locking teeth 4222 are arranged head to head. When the pair of locking teeth 4222 are all embedded in the thread groove, the locking teeth arranged in pairs are conducive to increasing the locking effect of the locking part and the locking groove, so that the base 5 and the fixed seat 4 are more reliably locked. The locking teeth 4222 can be obtained by cutting the locking tube body 421 through a laser cutting process, and the locking teeth 4222 can be a thin sheet of a rectangular or other suitable shape. It is understandable that the multiple locking teeth 4222 may also be arranged in other ways, as long as they can be reliably locked with the base 5 after being embedded in the thread groove, and no specific limitation is made here.

[0051] The fixed seat connecting member is a fixed seat connecting rod 6, and the distal end of the fixed seat connecting rod 6 extends into the elastic locking piece 422. A card slot 423 is provided on the elastic locking piece 422. A card block 63 is provided on the peripheral wall of the fixed seat connecting rod 6, and the card block 63 is adapted to the card slot 423. Under the restraint of the locking sleeve 7, the fixed seat connecting rod 6 is axially engaged with the fixed seat 4, and the proximal end of the fixed seat connecting rod 6 can be connected to the external handle, so that the fixed seat 4 can be driven by the fixed seat connecting rod 6 to move axially relative to the base 5 to open or close the flap clamp. When the locking sleeve 7 is withdrawn to release the elastic locking piece 422, the elastic locking piece 422 returns to the open state under the action of its own elastic force, and at this time the card block 63 is disengaged from the card slot 423, so that the fixed seat connecting rod 6 is released from the fixed seat 4, and the fixed seat connecting rod 6 can be withdrawn from the body.

[0052] Specifically, the fixed seat connecting rod 6 may include a first rod segment 61 and a second tube segment 62 connected in sequence from the proximal end to the distal end. The diameter of the first rod segment 61 is greater than the diameter of the second rod segment 62, and a block 63 is convexly provided on the peripheral wall of the second rod segment 62. Further, the diameter of the second rod segment 62 may be the same as the diameter of the inner core 43, and the diameter of the first rod segment 61 may be the same as the diameter of the locking tube body 421, so that when the second rod segment 62 is inserted into the locking tube body 421 and the block 63 is engaged with the card slot 423, the outer diameter of the elastic locking member 42 is the same as the first rod segment 61, which is convenient for the locking sleeve 7 to be sleeved on the fixed seat connecting rod 6 and the elastic locking member 42, and for the locking sleeve 7 to move axially relative to the elastic locking member 42 and the fixed seat connecting rod 6. Optionally, the elastic locking piece 422, the card slot 423 and the block 63 may be a pair respectively, and are symmetrically arranged. It can be understood that the present embodiment does not specifically limit the number and position of the card fast 63 and the card slot 423. When the block 63 is inserted into the slot 423, the elastic locking piece 422 can be closely attached to the peripheral wall of the second rod segment 62, and then the locking sleeve 7 is sequentially sleeved on the fixed seat connecting rod 6 and the elastic locking piece 42 from the proximal end to the distal end. The locking sleeve 7 restrains the elastic locking piece 422 so that the block 63 can always be inserted into the slot 423, so that the fixed seat connecting rod 6 and the fixed seat 4 are axially connected, and then the fixed seat connecting rod 6 can be driven to move the fixed seat 4 relative to the base 5 to open or close the flap clamp. It can be understood that the slot 423 structure of the elastic locking piece 422 and the block 63 structure position on the fixed seat connecting rod 6 can also be interchanged, that is, the inner wall of the elastic locking piece 422 is convexly provided with a block, and the peripheral wall of the second rod segment 62 is concavely provided with a slot, and the block and the slot are adapted to enable the elastic locking piece 422 and the fixed seat connecting rod 6 to be axially connected.

[0053] It is understandable that the connection structure between the elastic locking member 42 and the fixed seat connector is not limited to this. For example, the structures of the fixed seat connector and the elastic locking member 42 can be interchangeable. The proximal end of the elastic locking member 42 is a rod-shaped structure and penetrates into the elastic locking sheet structure at the distal end of the fixed seat connector, thereby realizing axial clamping and release between the two.

[0054] The elastic locking member 42 may be made of a shape memory material including but not limited to nickel-titanium alloy, so that the elastic locking piece 422 and the locking tooth 4211 have good shape memory properties.

[0055] See also Figure 3a , Figure 3b as well as Figure 4 As shown, the base connector 8 includes a proximal connecting pipe section 81 and a plurality of connecting plates 82 extending axially from the distal end of the proximal connecting pipe section 81. A buckle 83 is provided on the outer side of the bottom end of the connecting plate 82. The side wall of the base 5 is provided with a base card slot 52 adapted to the buckle 83. The connecting plate 82 is elastically retracted inwardly in a natural state so that the connecting plate 82 can penetrate into the base 5 and move axially relative to the base 5, and at this time, the buckle 83 can correspond to the position of the base card slot 52. When the locking sleeve 7 is inserted between the plurality of connecting plates 82, the connecting plate 82 can be opened so that the buckle 83 is clamped into the base card slot 52, so that the base 5 and the base connector 8 are axially clamped, and then the base 5 can be driven to move axially by the base connector 8. When the locking sleeve 7 withdraws from the base connector 8, the connecting plate 82 can elastically return to the retracted state and drive the buckle 83 to disengage from the base card slot 52, so as to release the base connector 8 and the base 5. When the locking sleeve 7 is inserted into the base connector 8 and the base 5, the buckle 83 of the base connector 8 is always embedded in the base slot 52, so that the base 5 and the base connector 8 are stably connected, so that the base 5 can be operated by the base connector 8, so that the base 5 can move axially relative to the fixed seat 4, and the axial distance between the base 5 and the fixed seat 4 can be adjusted steplessly. When the locking sleeve 7 is removed from between the multiple connecting plates 82, the multiple connecting plates 82 are retracted inwardly under their own elastic action and drive the buckle 82 to disengage from the base slot 52, so that the base connector 8 can be automatically released from the base 5, so that the base connector 8 can be withdrawn from the body.

[0056] It is worth mentioning that the lower clamping arm 2 may include an H-shaped supporting connecting arm 21 and an expansion wing 22. The H-shaped supporting connecting arm 21 is responsible for the motion control of the mechanism, and the expansion wing 22 is used to widen the clamping area of ​​the leaflet and enhance the clamping reliability.

[0057] The supporting connecting arm 21 is rotatably connected to the base 5 and the connecting rod 3 respectively. The supporting connecting arm 21 can be rotatably connected to the connecting rod 3 through a pin shaft, and can be rotatably connected to the base 5 through a pin shaft. The connecting rod 3 can be rotatably connected to the fixing seat 4 through a pin shaft, so that the lower clamping arm 2, the connecting rod 3 and the fixing seat 4 form a rotating pair. The expansion wing 22 is fixedly arranged on the side of the supporting connecting arm 21 facing the upper clamping arm 1. The expansion wing 22 can be fixedly arranged on the supporting connecting arm 21 by welding or bonding.

[0058] The expansion wing 22 is a hollow plate-like structure and has a clamping surface inclined toward the upper clamp arm 1. The clamping surface of each part of the expansion wing 22 is an inclined clamping surface from the inner circle to the outer circle. The expansion wing 22 is a hollow thin plate, and its thickness can be set according to actual needs. In the prior art, the clamping area provided by the lower clamp arm 2 for clamping the valve leaflets is generally small, which is not conducive to quickly and conveniently capturing the valve leaflets during surgery. The wing plates on both sides of the expansion wing 22 have clamping surfaces that are unfolded at an obtuse angle along the circumference, and the angle range of the obtuse angle α is 95° to 175°. In other words, the wing plates on both sides of the expansion wing 22 form a gentle slope surface toward the upper clamp arm 1 as the valve leaflet clamping surface, so that the expansion wing 22 can provide a larger clamping area, which is conducive to quickly capturing the valve leaflets, improving the flexibility of operation, and reducing the failure rate of clamping. Specifically, the connecting section 222 of the wing plates 221 on both sides of the expansion wing 22 forms a supporting surface 2221 that is inclined toward the side of the fixed seat 4. The expansion wing 22 may include two side wing plates 221 connected in one piece and an arc-shaped connecting section 222, wherein the connecting section 222 is connected between the two side wing plates 221, so that the expansion wing 22 as a whole may be in the shape of a petal with a hollow center. The connecting section 222 of the expansion wing 22 provides a supporting surface 2221, and the supporting surface 2221 may extend under the leaflet so that the leaflet slides into the clamping surface of the lower clamping arm 22. The expansion wing 22 gradually increases from the inner end to the outer end. The width of the supporting surface 2221 may be greater than the width of the two side wing plates of the expansion wing 22. It is understandable that the expansion wing 22 may also be made into an integral structure with the H-shaped support connecting arm 21, and this embodiment does not impose any specific restrictions on the specific shapes and connection methods of the two.

[0059] The upper clamp arm 1 may include a clamping portion 11 and a connecting portion 12 connected in one piece. The clamping portion 11 is evenly provided with a plurality of through holes 111, and a plurality of barbs 112 are respectively provided on both sides of the clamping portion 11. The number of through holes 111 may be between 3 and 8. The number of barbs 112 on one side of the clamping portion 11 may be between 3 and 8. The connecting portion 12 is provided with a weight-reducing hole 120.

[0060] The valve repair device may further include an upper clamp arm control wire 13. The upper clamp arm control wire 13 may be passed through the through hole 111 to manipulate the upper clamp arm 1.

[0061] In the embodiment of the present invention, the upper clamp arm 1 is preferably made of a shape memory alloy, such as a nickel-titanium alloy, and the remaining components are preferably made of a cobalt-chromium alloy, a titanium-based alloy or a 316L stainless steel material.

[0062] By pulling and releasing the upper clamp arm control wire 13, the opening and closing of the upper clamp arm 1 can be controlled; at the same time, pushing or pulling the locking sleeve 7 and the fixed seat connecting rod 6 can control the opening and closing of the lower clamp arm 2; withdrawing and pulling the locking sleeve 7 alone can gradually release the elastic locking piece 422 of the fixed seat 4, and the locking teeth of the elastic locking piece 422 are embedded in the locking groove 51 of the base 5 to achieve the locking of the petal clamp; continue to withdraw and pull the locking sleeve 7, the buckle 83 on the base connecting piece 8 elastically retracts to achieve the release of the base connecting piece 8 from the base 5, and at the same time, the elastic locking piece 422 of the fixed seat 4 opens under its own elastic action to achieve the release from the fixed seat connecting rod 6.

[0063] See also Figure 1 , Figure 2 , Figure 5a to Figure 5c As shown, the working principle of the valve clamping device of this embodiment is illustrated below.

[0064] During the operation, the upper clamp arm control wire 13 of the upper clamp arm 1 is pulled and tightened to put the upper clamp arm 1 in a retracted state; the base connector 8 is pushed to transport the valve clamping device as a whole to the specified position; the locking sleeve 7 and the fixed seat connecting rod 6 are pulled as a whole to open the lower clamp arm 2 and support the leaflet, and the upper clamp arm control wire 13 is released. The upper clamp arm 1 recovers the heat-set state under its own elasticity to capture the leaflet; the locking sleeve 7 and the fixed seat connecting rod 6 are pushed as a whole to close the lower clamp arm 2 and lock the leaflet; then the locking sleeve 7 is withdrawn separately to release the locking part (i.e., the locking tooth 4211) of the fixed seat 4, and the locking tooth 4211 is embedded in the locking groove 51 of the base 5 to realize the overall locking of the valve clamp; the locking sleeve 7 is continued to be withdrawn to make the buckle 83 on the base connector 8 elastically retract to realize the release of the base connector 8 from the base 5. At the same time, the elastic locking piece 422 on the fixed seat 4 opens under its own elasticity to realize the release from the fixed seat connecting rod 6. Finally, the locking sleeve 7, the fixing seat connecting rod 6 and the upper clamp arm control wire 13 are withdrawn to complete the operation.

[0065] The embodiment of the present invention utilizes the binding effect of the locking sleeve to keep the fixing seat connecting piece and the elastic locking piece of the fixing seat connected, so as to control the axial movement of the fixing seat relative to the base to adjust the opening and closing state of the leaflet clamp. By withdrawing the locking sleeve, the locking part of the elastic locking piece can be released to lock the elastic locking piece with the base, the fixing seat and the fixing seat connecting rod can be disengaged, and the base connecting piece can also be disengaged from the base, and the operation difficulty is relatively low. In addition, the lower clamping arm has a larger clamping area, which greatly reduces the difficulty of the leaflet clamping operation and is conducive to improving the clamping success rate.

[0066] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A valve clamping device, characterized in that: include: Clamping mechanism and control assembly; The clamping mechanism comprises an upper clamping arm, a lower clamping arm, a connecting rod, a fixing seat and a base; the upper clamping arm and the lower clamping arm are connected to the base respectively, and the connecting rod is connected to the lower clamping arm and the fixing seat; The base has a locking groove extending in the axial direction; the fixing seat comprises: a seat body and an elastic locking piece, the seat body is connected to the elastic locking piece, the elastic locking piece extends in the axial direction and penetrates into the base, and the distal end of the elastic locking piece has a locking portion that can be elastically opened in the radial direction, and the locking portion can cooperate with the locking groove to lock when it is opened; The control assembly comprises: a fixed seat connecting piece, a locking sleeve and a base connecting piece; the fixed seat connecting piece is coaxially arranged with the elastic locking piece and radially engaged with each other, the locking sleeve is sleeved on the elastic locking piece and the fixed seat connecting piece to gather the locking part and make the elastic locking piece axially engaged with the fixed seat connecting piece, and the locking sleeve can also move axially relative to the fixed seat connecting piece and the elastic locking piece to release the locking part and release the engagement between the fixed seat connecting piece and the elastic locking piece; The distal end of the base connector is snap-fitted with the base, and the locking sleeve is movably inserted into the base connector and the base. When the locking sleeve is inserted into the base, the base connector and the base can be kept snap-fitted, and when the locking sleeve is withdrawn from the base, the base connector can be released from the base.

2. The valve clamping device according to claim 1, characterized in that: The elastic locking member comprises a locking tube body, the locking portion is a plurality of locking teeth arranged on the locking tube body, the plurality of locking teeth can be gathered in the locking sleeve and can be elastically opened in a natural state and locked in cooperation with the locking groove.

3. The valve clamping device according to claim 2, characterized in that: The locking groove is a thread groove, and the locking teeth can be embedded in the thread groove to lock the elastic locking member and the base.

4. The valve clamping device according to claim 3, characterized in that: The multiple locking teeth are arranged in pairs in accordance with the thread direction and are spaced apart in a plurality of pairs; wherein the movable ends of each pair of locking teeth are arranged adjacent to each other.

5. The valve clamping device according to claim 2, characterized in that: The elastic locking member further comprises: at least one elastic locking piece connected to the proximal end of the locking tube body and extending in the axial direction, and the locking tube body is vertically arranged on the seat body; Correspondingly, the fixed seat connecting member is a fixed seat connecting rod, and its distal end extends into the elastic locking plate; a slot is provided on the elastic locking plate, and a block is provided on the peripheral wall of the fixed seat connecting rod, and the block is adapted to the slot so that the fixed seat connecting rod and the fixed seat are axially engaged; the elastic locking plate can be elastically opened in a natural state to allow the block to escape from the slot.

6. The valve clamping device according to claim 5, characterized in that: The fixing seat connecting rod comprises a first rod segment and a second rod segment which are sequentially connected from the proximal end to the distal end; the diameter of the first rod segment is larger than the diameter of the second rod segment, and the clamping block is protrudingly provided on the peripheral wall of the second rod segment.

7. The valve clamping device according to claim 2, characterized in that: The center of the seat body is provided with a fixing hole, the locking tube body extends into the fixing hole and is fixed to the seat body; the elastic locking member also includes: an inner core; the inner core is inserted into the locking tube body in a tight fitting manner.

8. The valve clamping device according to claim 1, characterized in that: The base connector includes a proximal connecting tube section and a plurality of connecting plates axially extending from the distal end of the proximal connecting tube section, a buckle is provided on the outer side of the bottom end of the connecting plate, and a base slot matched with the buckle is provided on the side wall of the base, so that the base connector is axially engaged with the base and can drive the base to move axially; the connecting plate elastically retracts inwardly in a natural state so that the connecting plate can penetrate into the base and move axially relative to the base, and when the locking sleeve is penetrated between the plurality of connecting plates, the connecting plate can be opened so that the buckle is inserted into the base slot, and when the locking sleeve withdraws from the base connector, the connecting plate can elastically return to a retracted state and drive the buckle to disengage from the base slot.

9. The valve clamping device according to any one of claims 1 to 8, characterized in that: The lower clamping arm includes an H-shaped supporting connecting arm and an expansion wing; The supporting connecting arms are rotatably connected to the base and the connecting rod respectively; The expansion wing is fixedly arranged on a side of the supporting connecting arm facing the upper clamping arm; the expansion wing is in a hollow plate-like structure and has a clamping surface inclined toward the upper clamping arm.

10. The valve clamping device according to claim 9, characterized in that: The wing plates on both sides of the expansion wing have a clamping surface that is opened at an obtuse angle along the circumferential direction, and the angle range of the obtuse angle is 95°~175°.

11. The valve clamping device according to claim 9, characterized in that: A supporting surface which is inclined toward the fixing seat is formed at the connecting section of the two side wings of the expansion wing.

12. The valve clamping device according to claim 11, characterized in that: The expansion wing gradually increases in size from the inner end to the outer end.

13. The valve clamping device according to any one of claims 1 to 8, characterized in that: The upper clamping arm comprises: a clamping portion and a connecting portion which are integrally connected; The clamping part is evenly provided with a plurality of through holes, and the two sides of the clamping part are respectively provided with a plurality of barbs; The connecting portion is provided with a weight-reducing hole.

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