Forceps holder unit, curling mechanism, pressing and holding device and pressing and holding system

Abstract

The utility model discloses a forceps holder unit, a curling mechanism, a pressing and holding device and a pressing and holding system. The forceps holder unit comprises a first forceps body, a second forceps body, a limiting shaft, a first guide block, a first guide strip, a second guide block and a second guide strip. One ends of the first clamp body and the second clamp body are integrally connected, and the other ends are detachably connected through a limiting shaft; the first guide block and the first guide strip are located on the outer side face of the first clamp body. The second guide block and the second guide strip are located on the outer side face of the second clamp body. The first clamp body and the second clamp body are in mirror symmetry, and the second clamp body sequentially comprises a first outer ridge, a second outer ridge, a third outer ridge, a fourth outer ridge, a first front side edge, a second front side edge and a third front side edge; the length of the second outer ridge is larger than that of the second front side edge, and the second outer ridge, the second front side edge and the long axis center line of the first guide strip are parallel. The forceps holder units are small in surrounding diameter during application and suitable for small-diameter pressing and holding treatment, and the design cost and the manufacturing cost are reduced through the forceps holder units.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a pair of forceps unit, curl mechanism, pressure holder and pressure hold system. BACKGROUND

[0002] Heart valve disease is a common heart disease. Previously, the only option for patients with aortic valve stenosis was traditional open chest surgery. However, traditional open chest surgery has the disadvantages of large trauma, long operation time (usually 3-4 hours), severe postoperative pain, and slow recovery of patients. With the increasing aging of the population and the increasing incidence of heart valve disease, the risk of open chest surgery for the elderly population is generally high. Transcatheter aortic valve replacement (TAVR) is a minimally invasive surgery that implants an artificial biological valve inside the existing diseased aortic valve. It can usually be performed through femoral artery puncture under a catheter, similar to coronary stent surgery through femoral artery puncture.

[0003] The pressure holder (artificial biological valve curling device) is an auxiliary tool for loading and releasing the artificial biological valve. Before implantation, the artificial biological valve needs to be installed in a curled state at the distal end of the catheter delivery assembly. The artificial biological valve needs to be handled by the pressure holder to make the diameter of the artificial biological valve smaller, so that the artificial biological valve can be delivered to the diseased position of the heart valve through the catheter delivery assembly.

[0004] The artificial biological valve being pressed is a "stent valve" (artificial biological valve in embodiment three of application number 201920458990.1), as shown in Figure 1A The "stent valve" has a stent frame or stent that provides main structural support in an expanded state. The stent frame or stent (cobalt-chromium alloy material) is an expandable tubular structure that can be expanded by a balloon or by its own inherent elasticity. The valve structure mounted on the stent frame or stent is formed by a biological material. In this example, the biological material is three pieces of bovine pericardium leaflets, which are prepared from healthy bovine pericardium as raw material after chemical modification. The entire stent valve is composed of three pieces of bovine pericardium leaflets, sutures, outer skirts, inner skirts, and stents. In order to maintain the improvement function after installation in the human body, it is usually necessary to store such valves in an expanded state in a preservation solution. A few minutes before transplantation, the stent valve needs to be processed by the pressure holder for pressure holding and curling in the operating room.

[0005] The existing pressure holder has the disadvantages of low artificial biological valve pressure holding yield and high jump rate when performing pressure holding and curling processing on the artificial biological valve during use. Content of the utility model

[0006] In order to improve the stability of force transmission of the pressure holder in the pressure process, reduce the cumulative error of each clamp, so that the artificial biological valve is more round, and then improve the artificial biological valve pressure holding yield, the utility model provides a clamp unit, a curling mechanism, a pressure holder and a pressure holding system.

[0007] In a first aspect, the utility model provides a clamp unit, the clamp unit can include: first jaw body, second jaw body, limit shaft, first guide block, first guide bar, second guide block and second guide bar, one end of the first jaw body and the second jaw body is integrally connected, and the other end is detachably connected through the limit shaft, the first guide block and the first guide bar are located on the outer side of the first jaw body, and the second guide block and the second guide bar are located on the outer side of the second jaw body.

[0008] The first jaw body and the second jaw body are mirror symmetrical, and the second jaw body can include first outer ridge, second outer ridge, third outer ridge, fourth outer ridge, first front side, second front side and third front side in turn, the length of the second outer ridge is greater than the length of the second front side, the long axis center line of the second outer ridge, the second front side and the first guide bar is parallel, the included angle between the first outer ridge and the second outer ridge is 150 DEG, the included angle between the second outer ridge and the third outer ridge is 150 DEG, the included angle between the third outer ridge and the fourth outer ridge is 105 DEG, the included angle between the fourth outer ridge and the first front side is 30 DEG, the included angle between the first front side and the second front side is 105 DEG, and the included angle between the second front side and the third front side is 150 DEG.

[0009] In one embodiment, the first outer ridge and the second outer ridge are circularly transitioned, the second outer ridge and the third outer ridge are circularly transitioned, the third outer ridge and the fourth outer ridge are circularly transitioned, the first front side and the second front side are circularly transitioned, and the second front side and the third front side are circularly transitioned.

[0010] In another embodiment, the limit shafts respectively pass through the first jaw body and the second jaw body and are connected with the first guide block and the second guide block respectively.

[0011] In a second aspect, the utility model provides a curling mechanism, which is used for a pressure holder, and can include a clamp assembly, a turntable, a first shell and a second shell.

[0012] The rotating disc is provided with a plurality of first stroke tracks and a plurality of second stroke tracks; the plurality of first stroke tracks are regularly arranged in the form of a fan and close to the edge of the rotating disc, and the plurality of second stroke tracks are arranged in the form of inclined radiation and close to the center of the rotating disc;

[0013] The clamp assembly comprises a plurality of clamp units as described in the first aspect, the number of the clamp units being equal to the number of the second stroke tracks; the first clamp body and the second clamp body of the clamp unit are integrally connected away from one end of the second stroke track and are slidably connected to the second stroke track through the limiting shaft of the clamp unit close to one end of the second stroke track;

[0014] The inner surface of the first shell is provided with a first positioning pin matched with the first stroke track, and a first track unit matched with the first guide block and the first guide strip in the clamp assembly respectively; the inner surface of the second shell is provided with a second positioning pin matched with the first stroke track and the first positioning pin respectively, and a second track unit matched with the second guide block and the second guide strip in the clamp assembly respectively;

[0015] The first shell and the second shell are combined to form a containing cavity, the rotating disc and the clamp assembly are located in the containing cavity, and the first shell and the second shell are connected through the first positioning pin and the second positioning pin; the rotating disc rotates to act on the limiting shaft, respectively drives the first guide block, the first guide strip to slide on the first track unit, and the second guide block and the second guide strip to slide on the second track unit, so as to drive a plurality of the clamp units to gather or separate radially.

[0016] In an embodiment, the number of the first track units and the number of the second track units are equal to the number of the clamp units respectively;

[0017] The plurality of first track units are uniformly distributed in the form of a circle on the inner surface of the first shell, each first track unit can comprise a first sliding groove and a first partition plate; the first sliding groove is located in the radial direction of the circle where the plurality of first track units are located, a second sliding groove is formed between the first sliding groove and the first partition plate, and the center line of the first sliding groove is parallel to the center line of the second sliding groove; the first guide block is located in the first sliding groove and can slide in the first sliding groove; the first guide strip is located in the second sliding groove and can slide in the second sliding groove;

[0018] A plurality of the second track units are uniformly distributed in a circular shape on the inner surface of the second shell, each of the second track units can comprise: a third sliding groove and a second partition plate; the third sliding groove is located in the radial direction of the circle where the plurality of the second track units are located, a fourth sliding groove is formed between the third sliding groove and the second partition plate, and the center line of the third sliding groove is parallel to the center line of the fourth sliding groove; the second guide block is located in the third sliding groove and can slide in the third sliding groove; and the second guide strip is located in the fourth sliding groove and can slide in the fourth sliding groove.

[0019] In one embodiment, the first sliding groove and the third sliding groove are respectively strip-shaped closed sliding grooves.

[0020] In one embodiment, the radius of the circle where the plurality of first positioning pins are located is greater than the radius of the circle where the plurality of first sliding grooves are located; and / or, the radius of the circle where the plurality of second positioning pins are located is greater than the radius of the circle where the plurality of third sliding grooves are located.

[0021] In one embodiment, the arc of the arc segment where the first stroke track is located is 85°-92°; and the arc of the arc segment where the second stroke track is located is 75°-82°.

[0022] In one preferred embodiment, the arc of the arc segment where the first stroke track is located is 87°-89°; and the arc of the arc segment where the second stroke track is located is 78°-79°.

[0023] In one embodiment, the rotating disc is provided with a middle hole; the first shell is provided with a first through hole matched with the middle hole, and the second shell is provided with a second through hole matched with the middle hole; the aperture of the middle hole is not less than the aperture of the first through hole, and the aperture of the middle hole is not less than the aperture of the second through hole; the first through hole, the middle hole and the second through hole are located on the same center line and form a material processing channel.

[0024] In a third aspect, the utility model provides a kind of pressure gripper, and the pressure gripper includes: handle and the curling mechanism as described in the second aspect;

[0025] The handle is connected with the rotating disc of the curling mechanism;The side surface of the first shell of the curling mechanism is provided with a first limiting opening, and the side surface of the second shell of the curling mechanism is provided with a second limiting opening;The first limiting opening and the second limiting opening form a driving limiting opening, and the driving limiting opening is located on one side of the vertical center line of the pressure gripper;The handle extends out of the driving limiting opening, and can swing the rotating disc in the driving limiting opening;The handle drives the rotating disc to rotate, to drive the plurality of jaw units to be radially gathered or separated.

[0026] In one embodiment, the pressing device can further comprise a base, wherein a mounting slot is formed on the base, and the first shell and the second shell of the curling mechanism are detachably mounted in the mounting slot after being overlapped.

[0027] In one embodiment, the pressing device can further comprise a first stopper, wherein the first stopper is located at one end of the driving limiting opening away from the vertical center line of the pressing device.

[0028] A limiting slot is formed on the base, and the first stopper is detachably inserted into the limiting slot.

[0029] In one embodiment, the two sides of the mounting slot on the base are provided with a first slot and a second slot, and the positions of the first slot and the second slot match the positions of the material processing channel formed by the middle hole on the rotating disc, the first through hole on the first shell, and the second through hole on the second shell.

[0030] The pressing device can further comprise two groups of support assemblies, wherein each group of support assemblies comprises a guide column, a guide slot, and a pressing plate, two guide columns are detachably inserted into the first slot and the second slot respectively, two guide slots are connected with the two guide columns respectively, and the positions of the two guide slots match the positions of the material processing channel, and two pressing plates are clamped with the two guide slots respectively, and the pressing plates can slide on the guide slots, and the shape of the pressing plates clamped with the guide slots matches the shape of the catheter delivery assembly connected with the curled artificial biological valve.

[0031] In one embodiment, a limiting lug is arranged on the pressing plate, and the size of the limiting lug is greater than the hole diameter of the first through hole on the first shell and the second through hole on the second shell.

[0032] In one embodiment, the pressing device can further comprise a second stopper, wherein the second stopper is located in the accommodating cavity, connected with the first shell and the second shell respectively, and matches the position of the driving limiting opening.

[0033] The edge of the first shell extends to form a first support seat, and the edge of the second shell extends to form a second support seat, and the first support seat and the second support seat form a support base to support the pressing device in the overlapped state of the first shell and the second shell.

[0034] In a fourth aspect, the utility model discloses a pressing device, which can comprise a gear assembly and a curling mechanism as described in the second aspect.

[0035] The first shell or the second shell of the curling mechanism is provided with a mounting position, one end of the gear assembly is matched with the rotating disc of the curling mechanism, and the other end extends out of the mounting position;

[0036] The gear assembly drives the rotating disc to rotate, so as to drive the plurality of clamp units in the curling mechanism to be radially gathered or separated.

[0037] In one embodiment, the gear assembly can include a rotating knob, a rotating shaft, a driving gear and a gear ring; the gear ring is nested outside the rotating disc in the curling mechanism, the driving gear is engaged with the gear ring, one end of the rotating shaft is connected with the driving gear, and the other end extends out of the mounting position and is connected with the rotating knob; the gear ring of the gear assembly drives the rotating disc to rotate, so as to drive the plurality of clamp units in the curling mechanism to be radially gathered or separated.

[0038] In one embodiment, the gear assembly can include a rotating knob, a rotating shaft and a driving gear; the periphery of the rotating disc in the curling mechanism is provided with a gear tooth; the driving gear is engaged with the gear tooth of the periphery of the rotating disc; one end of the rotating shaft is connected with the driving gear, and the other end extends out of the mounting position and is connected with the rotating knob; the driving gear of the gear assembly drives the rotating disc to rotate, so as to drive the plurality of clamp units in the curling mechanism to be radially gathered or separated.

[0039] In one embodiment, the edge of the first shell extends to form a first supporting seat, and the edge of the second shell extends to form a second supporting seat; in the state that the first shell and the second shell are covered, the first supporting seat and the second supporting seat form a supporting base, so as to support the clamp.

[0040] In a fifth aspect, the utility model embodiment provides a kind of clamp system, it include: catheter conveying component and as the clamp of third aspect or fourth aspect;The artificial biological valve that is crimped is used to be connected with one end of the catheter conveying component;The artificial biological valve that is crimped is handled by the clamp and is crimped.

[0041] The above technical solutions provided in the embodiments of the utility model have at least the following beneficial effects:

[0042] The utility model discloses a kind of clamp unit, curling mechanism, pressure holder and pressure holding system, first aspect, the structure of the clamp unit is smaller after being assembled into clamp assembly, can be applied to small diameter pressure holding processing;Second aspect, the structure of each clamp unit is same when the clamp unit is assembled into clamp assembly, compared with four different clamp assemblies in prior art, the clamp unit of this structure reduces design cost and manufacturing cost;Third aspect, the clamp unit is independently operated when using, i.e. the clamp unit is driven by limiting shaft, is limited by guide block and guide bar, compared with driving and limiting by two side spiral tracks in prior art, reduce cumulative error.

[0043] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0044] The technical solutions of the utility model will be described in further detail below with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the application, and are not intended to limit the application. In the drawings:

[0046] Figure 1A It is a schematic diagram of artificial biological valve structure in prior art;

[0047] Figure 1B It is one of repair valve curling device structure diagram in prior art;

[0048] Figure 1C It is Figure 1B The exploded view of;

[0049] Figure 1D It is Figure 1B The sectional view of;

[0050] Figure 1E It is the second exploded view of repair valve curling device structure diagram in prior art;

[0051] Figure 2 It is the structure diagram of clamp unit provided in the utility model embodiment;

[0052] Figure 3 It is the perspective view of clamp assembly provided in the utility model embodiment;

[0053] Figure 4The utility model discloses a clamp assembly's orthographic projection provided in the embodiment of the utility model;

[0054] Figure 5 The utility model discloses a whole structure schematic view of the curling mechanism provided in the embodiment of the utility model;

[0055] Figure 6 For Figure 5 The utility model discloses an explosion map of the curling mechanism;

[0056] Figure 7 For Figure 5 The utility model discloses a cross section view in vertical direction;

[0057] Figure 8 The utility model discloses a structure diagram of the turntable provided in the embodiment of the utility model;

[0058] Figure 9 The utility model discloses a structure diagram of the first shell and second shell provided in the embodiment of the utility model;

[0059] Figure 10 The utility model discloses a structure diagram of the clamp assembly and second shell provided in the embodiment of the utility model;

[0060] Figure 11 The utility model discloses a structure diagram of the clamp assembly open state and closed state provided in the embodiment of the utility model;

[0061] Figure 12 The utility model discloses one of the structure diagram of the pressure holder provided in the embodiment of the utility model;

[0062] Figure 13 For Figure 12 The utility model discloses an explosion map of the pressure holder;

[0063] Figure 14 The utility model discloses the second of the structure diagram of the pressure holder provided in the embodiment of the utility model;

[0064] Figure 15 For Figure 14 The utility model discloses a partial area exploded view of the pressure holder;

[0065] Figure 16 The utility model discloses a structure diagram of the turntable, handle and second stop piece provided in the embodiment of the utility model;

[0066] Figure 17 The utility model discloses the third of the structure diagram of the pressure holder provided in the embodiment of the utility model;

[0067] Figure 18 For Figure 17 The utility model discloses an explosion map of the pressure holder;

[0068] Among them, 1 - curling mechanism, 2 - handle, 3 - base, 4 - first stop piece, 5 - support assembly, 6 - second stop piece, 7 - support base, 8 - gear assembly, 10 - artificial biological valve.

[0069] 11- clamp assembly; 12- rotary disc; 13- first housing; 14- second housing; 15- accommodating cavity; 16- driving limiting opening; 17- mounting position;

[0070] 111- clamp unit; 112- first clamp body; 113- second clamp body; 114- limiting shaft; 115- first guide block; 116- first guide bar; 117- second guide block; 118- second guide bar;

[0071] 1131- first outer ridge; 1132- second outer ridge; 1133- third outer ridge; 1134- fourth outer ridge; 1135- first front side edge; 1136- second front side edge; 1137- third front side edge;

[0072] 121- first stroke track; 122- second stroke track; 123- middle hole; 124- gear tooth;

[0073] 131- first positioning pin; 132- first track unit; 133- first sliding groove; 134- first partition plate; 135- second sliding groove; 136- first through hole; 137- first limiting opening; 138- first support seat;

[0074] 141- second positioning pin; 142- second track unit; 143- third sliding groove; 144- second partition plate; 145- fourth sliding groove; 146- second through hole; 147- second limiting opening; 148- second support seat;

[0075] 31- mounting slot; 32- limiting slot; 33- first slot; 34- second slot;

[0076] 51- guide column; 52- guide slot; 53- pressing plate; 54- limiting lug;

[0077] 81- rotating knob; 82- rotating shaft; 83- driving gear; 84- gear ring;

[0078] 1001- clamp; 1002- housing fitting; 1003- rotating disc; 1004- base fitting; 1005- handle; 1006- stopping member; 1007- central shaft; 1008- cam member; 1009- spiral track; 1010- guide slot; 1011- secondary slot; 1012- guide plate; 1013- guide convex strip; 1014- valve; 1015- clamp gap; 1016- rotating handle; 1017- shaft; 1018- pinion; 1019- gear wheel. DETAILED DESCRIPTION

[0079] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood, and so that the scope of the present disclosure complete can be conveyed to those skilled in the art.

[0080] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "far", "near", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and should not be understood as indicating or implying relative importance.

[0081] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] Referring to Figures 1B-1EAs shown, the existing crimper jaws 1001 are configured to rotate about the central axis 1007, and the housing fittings 1002 are on either side of the jaws 1001. Each portion of the housing fittings 1002 includes a substantially disc-shaped member with a radially oriented annular wall (rotating disc 1003) and an outer rim extending toward the opposing housing fitting 1002 portion; the housing fittings 1002 in turn constrain each jaw 1001 to allow only radial movement. Each jaw 1001 preferably has a pair of guide plates 1012 oriented outwardly on either side of the two shafts 1017 at the radially outermost portion of the jaw 1001. The guide plates 1012 extend through and interact with guide slots 1010 in each stationary housing fitting 1002, thereby constraining linear sliding motion of the jaw 1001 toward and away from the central axis 1007. An elongated guide ridge 1013 extends from either side of each jaw 1001, engaging parallel secondary slots 1011 in each stationary housing fitting 1002. All four guide plates 1012 and guide ridges 1013 in each individual jaw 1001 are parallel, as are the four corresponding guide slots 1010 and secondary slots 1011. The resulting assembly constrains the motion of the jaws 1001 within the housing fittings 1002 to the guide slots 1010 and secondary slots 1011, which are generally radially oriented. In fact, the guide slots 1010 are on radial lines outward from the center of the crimping mechanism, while the secondary slots 1011 are parallel thereto but slightly offset. The jaw gap 1015 closes to the extent of the fully crimped band support valve 1014.

[0083] Both rotating discs 1003 have shaft 1017 necks to rotate about the central axis 1007 on adjacent housing fittings 1002. Handles 1005 are connected to both rotating discs 1003 by a bracket structure to cause them to rotate in unison. A helical cut, groove, or track in each rotating disc 1003 is provided on either side of the crimping mechanism to convert rotational motion of the lever handle 1005 to linear motion of the jaws 1001. Ideally, a helical track 1009 is formed between helical walls extending inward from the rotating disc 1003. The helical track 1009 interacts with actuating cam members 1008, which are located on either side of each jaw 1001, particularly extending outward from each guide plate 1012. For each jaw 1001, there are four helical tracks 1009 acting on four cam members 1008.

[0084] Referring to Figure 1EAs shown, instead of using lever handle 1005, the actuator includes a rotating handle 1016 connected to shaft 1017 and pinion 1018 to rotate a single rotating disc 1003. Pinion 1018 is engaged with a large gear 1019 on rotating disc 1003. Actuation cam members 1008 on only one side of the jaws 1001 are coupled to a single helical track 1009 and guided by coupling guide slots 1010 and secondary slots 1011 to guide plates 1012 and guide lugs 1013.

[0085] The inventor found that during the use of the crimping device (a prosthetic valve crimping device) as shown in Figures 1B-1E The inventor found that during the use of the crimping device (a prosthetic valve crimping device) as shown in Figure 1D The inventor found that during the use of the crimping device (a prosthetic valve crimping device) as shown in

[0086] The inventor found that during the use of the crimping device (a prosthetic valve crimping device) as shown in Figures 2-4As shown, the clamp unit 111 can include: a first clamp body 112, a second clamp body 113, a limiting shaft 114, a first guide block 115, a first guide strip 116, a second guide block 117 and a second guide strip 118; one end of the first clamp body 112 and the second clamp body 113 are integrally connected, and the other end is detachably connected through the limiting shaft 114; the first guide block 115 and the first guide strip 116 are located on the outer side of the first clamp body 112, and the second guide block 117 and the second guide strip 118 are located on the outer side of the second clamp body 113; the first clamp body 112 and the second clamp body 113 are mirror-symmetric, and the second clamp body 113 can include, in sequence: a first outer ridge 1131, a second outer ridge 1132, a third outer ridge 1133, a fourth outer ridge 1134, a first front side edge 1135, a second front side edge 1136 and a third front side edge 1137; the length of the second outer ridge 1132 is greater than the length of the second front side edge 1136, and the long axis center line of the second outer ridge 1132, the second front side edge 1136 and the first guide strip 116 are parallel; the included angle between the first outer ridge 1131 and the second outer ridge 1132 is 150°, the included angle between the second outer ridge 1132 and the third outer ridge 1133 is 150°, the included angle between the third outer ridge 1133 and the fourth outer ridge 1134 is 105°, the included angle between the fourth outer ridge 1134 and the first front side edge 1135 is 30°, the included angle between the first front side edge 1135 and the second front side edge 1136 is 105°, and the included angle between the second front side edge 1136 and the third front side edge 1137 is 150°.

[0087] The clamp unit provided in the embodiment of the utility model can be assembled into a circular clamp assembly, and the structure of each clamp unit is the same, each clamp unit is driven by the limiting shaft 114 (a connected rotary disc provides driving power), and is radially limited by the guide block (the first guide block 115 and the second guide block 117) and the guide strip (the first guide strip 116 and the second guide strip 118), so that each clamp unit in the clamp assembly can be individually and synchronously operated, and gathering and separation are realized.

[0088] The first clamp body 112 and the second clamp body 113 in the clamp unit 111 in the embodiment of the utility model are mirror-symmetric structures, according to the positional relationship of the first clamp body 112 and the second clamp body 113, they are divided into front side, outer side and inner side, and the second clamp 113 is taken as an example for description, the second clamp body 113 includes, in sequence: the first outer ridge 1131, the second outer ridge 1132, the third outer ridge 1133, the fourth outer ridge 1134, the first front side edge 1135, the second front side edge 1136 and the third front side edge 1137, and in the embodiment, a driving gap is formed between the first clamp body 112 and the second clamp body 113, and the first clamp body 112 and the second clamp body 113 are driven by the limiting shaft 114. Figure 11As shown, in the dispersed state of the clamp assembly 11, the fourth outer ridge and the first front side edge of two adjacent clamp units 111 are in a separated state, and in the gathered state of the clamp assembly 11, the fourth outer ridge and the first front side edge of two adjacent clamp units 111 are in a fitted state, so that the diameter of the enclosed circle is not greater than 1 mm, which assists the doctor in the clinical application to perform small-diameter (diameter less than 5 mm) compression and holding processing on the artificial biological valve.

[0089] The clamp unit provided in the embodiment of the utility model has the following effects: in the first aspect, the structure of the clamp unit has a smaller diameter after being assembled into a clamp assembly, and can be applied to small-diameter compression and holding processing; in the second aspect, the structure of each clamp unit is the same when the clamp unit is assembled into a clamp assembly, compared with four different clamp assemblies in the prior art, the clamp unit of the structure reduces the design cost and manufacturing cost, and is easy to replace after being damaged; in the third aspect, the clamp unit is independently operated when in use, that is, the clamp unit is driven by a limiting shaft, and is limited by a guide block and a guide strip, compared with being driven and limited by two side spiral tracks in the prior art, the clamp unit reduces the cumulative error.

[0090] In an optional embodiment, referring to Figures 2-4 As shown, the first outer ridge 1131 and the second outer ridge 1132 are connected by a rounded corner, the second outer ridge 1132 and the third outer ridge 1133 are connected by a rounded corner, the third outer ridge 1133 and the fourth outer ridge 1134 are connected by a rounded corner, the first front side edge 1135 and the second front side edge 1136 are connected by a rounded corner, and the second front side edge 1136 and the third front side edge 1137 are connected by a rounded corner. In the embodiment, the edges of the clamp body (the first clamp body and the second clamp body) are provided with rounded corners, which can prevent the adjacent clamp units from being connected at right angles and being difficult to separate after being gathered, and can avoid the sharp connection between the small clamp unit components from causing harm to the assembly personnel during assembly.

[0091] In an optional embodiment, referring to Figures 2-4 As shown, the limiting shaft 114 penetrates through the first clamp body 112 and the second clamp body 113, and is connected with the first guide block 115 and the second guide block 117, respectively. In the embodiment, when the clamp unit 111 is assembled or the clamp unit 111 is assembled on the turntable, the limiting shaft 114 needs to be disassembled from one end of the first clamp body 112 or the second clamp body 113, then penetrate through the second stroke track 122 on the turntable 12, and then be assembled, so that the limiting shaft 114 penetrates through the first clamp body 112 and the second clamp body 113, and then the two ends are connected with the first guide block 115 and the second guide block 117, respectively. The specific connection mode can be threaded connection, riveting connection, buckle connection, etc., which is not limited in the embodiment.

[0092] Based on the same inventive concept, the utility model embodiment provides a curling mechanism, the curling mechanism 1 is used for the pressure holder, refers to Figures 5-11 As shown, the curling mechanism 1 can include: clamp assembly 11, rotating disc 12, first shell 13 and second shell 14;Rotating disc 12 is provided with a plurality of first stroke tracks 121 and a plurality of second stroke tracks 122;A plurality of first stroke tracks 121 are regularly scalloped and arranged close to the edge of rotating disc 12, and a plurality of second stroke tracks 122 are arranged in inclined radial and close to the center of rotating disc 12;Clamp assembly 11 includes a plurality of the above-mentioned clamp units 111, and the number of clamp units 111 is equal to the number of second stroke tracks 122;The first jaw body 112 and the second jaw body 113 of clamp unit 111 are integrally connected away from one end of second stroke track 122, and are slidably connected with second stroke track 122 through the limiting shaft 114 of clamp unit 111 close to one end of second stroke track 122;The inner surface of first shell 13 is provided with first positioning pin 131 matched with first stroke track 121, and first track unit 132 matched with first guide block 115 and first guide strip 116 in clamp assembly 11 respectively;The inner surface of second shell 14 is provided with second positioning pin 141 matched with first stroke track 121 and first positioning pin 131 respectively, and second track unit 142 matched with second guide block 117 and second guide strip 118 in clamp assembly 11 respectively;First shell 13 and second shell 14 cover to form containing cavity 15, rotating disc 12 and clamp assembly 11 are located in containing cavity 15, and first shell 13 and second shell 14 are connected through first positioning pin 131 and second positioning pin 141;Rotating disc 12 rotates to act on limiting shaft 114, respectively drives first guide block 115, first guide strip 116 to slide on first track unit 132, and second guide block 117 and second guide strip 118 to slide on second track unit 142, to drive a plurality of clamp units 111 to gather or separate radially (a plurality of clamp units 111 enclose the radial direction of a circle).

[0093] The above-mentioned curling mechanism in the utility model embodiment, through the second stroke track on the rotating disc drives the limiting shaft to move, to drive a plurality of groups of clamp units to gather or separate radially synchronously, compared with the rotating disc on the two side shells in the prior art drives the clamp to move radially, because the two side forces in the prior art require higher manufacturing precision for cam member, and the uneven two side forces lead to force error, the rotating disc in the utility model embodiment directly contacts with the limiting shaft, compared with the process of force transmission through cam member on two sides, it is more stable, to make the artificial biological valve pressed more round, and further improve the artificial biological valve pressure holding yield.

[0094] The utility model embodiment introduces each device as follows: refer to Figures 6-8As shown, the rotating disc 12 is in the form of a disc as a whole and is located in the middle part of the curling mechanism 1 in the vertical direction, has a certain thickness in the axial direction, and is provided with a first stroke track 121 and a second stroke track 122. In the embodiment, the first stroke track 121 and the second stroke track 122 are arc-shaped through grooves formed in the rotating disc 12. Since the rotating disc 12 is located in the middle part of the curling mechanism 1, and the curling mechanism 1 is used to curl and hold the artificial biological valve 10 (as shown in FIG. 1) with a few millimeters, the precision requirement is very strict. The rotating disc 12 is the starting point of force transmission, so the process of force transmission is more stable than that in the prior art through the two side shells, and the phenomenon that the two side shells transmit force with different sizes due to insufficient equipment precision is avoided.

[0095] Referring to Figure 8 and Figure 10 As shown, the first stroke track 121 can be part of the limiting function component. Since it cooperates with the first positioning pin 131 on the first shell 13 and the second positioning pin 141 on the second shell 14, the first positioning pin 131 and the second positioning pin 141 can only slide within the stroke range of the first stroke track 111, so that the rotating angle range of the rotating disc 12 relative to the first shell 13 and the second shell 14 is limited. In the embodiment, three first stroke tracks 121 are arranged, so that the first positioning pin 131 on the first shell 13 and the second positioning pin 141 on the second shell 14 are also three. The inventor designs in this way, which can not only ensure the stable connection of the first shell 13 and the second shell 14, but also achieve the purpose of limiting through the first stroke track 111, the first positioning pin 131 and the second positioning pin 141, and avoid the relative rotation angle being too small due to the limiting effect of more groups of design, and avoid the disadvantages of limited holding force and size. It should be further explained that the first stroke track 121 in the embodiment is a regular sector and is arranged close to the edge of the rotating disc 12. The inventor designs in this way to avoid the resistance in the radial direction when the first stroke track 121 respectively slides relative to the first positioning pin 131 and the second positioning pin 141, which enables the user (usually medical staff) to normally hold the curling mechanism 1 with less effort.

[0096] Referring to Figure 8 and Figure 10As shown, the second stroke track 122 on the rotating disc 12, as the starting point of force transmission, is arranged in an inclined radial manner close to the center of the rotating disc 12, which can provide power for the radial movement of the limiting shaft 114, and then the radial movement of the clamping unit 111 is realized under the cooperation of the limiting action of the guide block (the first guide block 115 and the second guide block 117), the guide strip (the first guide strip 116 and the second guide strip 118), and the track unit (the first track unit 132 and the second track unit 142) on the shell, so as to realize the synchronous radial gathering or separation of a plurality of clamping units 111. Since each second stroke track 122 can only drive one clamping unit 111 to transmit force, the force transmission error between each clamping unit 111 is irrelevant. In the prior art, force transmission is realized by one spiral track cooperating with four sets of clamping units, which causes the cumulative error to gradually increase, and if the design or machining size of one spiral track deviates, it will cause unstable force transmission of the four sets of clamping units matched therewith and cause the pressing to be not round in pieces or the clamping unit to jump during the pressing process. Further, since the angle of the spiral track changes greatly, the user needs to exert more force to drive the clamping unit to slide along the spiral track, which is more laborious. In the embodiment of the utility model, a plurality of second stroke tracks 112 and a plurality of clamping units 111 are matched, and since each second stroke track 122 is matched with a limiting shaft 114 of one clamping unit 111, the adjacent clamping units 111 do not affect each other during force transmission, and no cumulative error is generated.

[0097] Referring to Figure 8 and Figure 11 As shown, the number of the second stroke track 122 and the clamping unit 111 is set to 12 in the specific implementation of the embodiment of the utility model, and referring to Figures 2-4 The rotating disc 12 can drive the 12 clamping units 111 to move, so as to change the diameter of the pressing hole (the hole surrounded by the end of the clamping unit 111 close to the center), and when the diameter of the pressing hole is gradually reduced, the artificial biological valve placed in the pressing hole can be pressed and curled. The end (free end) of the 12 clamping units 111 close to the center can be surrounded to form a circle with a diameter not greater than 1 mm. When the diameter of the pressing hole is gradually increased, the pressed artificial biological valve can be taken out, or the artificial biological valve to be pressed can be placed.

[0098] Referring to Figures 2-4 As shown, the clamping assembly 11 in the curling mechanism 1 is composed of a plurality of clamping units 111, which is composed of 11 clamping units in the specific implementation. Due to the structure of the clamping unit 111, referring to Figure 9 As shown, the clamping unit 111 moves radially under the limiting action of the first track unit 132 on the first shell 13 and the second track unit 142 on the second shell 14.

[0099] Referring to Figure 6 , Figure 7 , Figure 9 and Figure 10 , the first shell 13 and the second shell 14 in the embodiment are mirror-symmetric, the first positioning pin 131 on the inner surface of the first shell 13 matches the second positioning pin 141 on the inner surface of the second shell 14, and the first shell 13 and the second shell 14 are fixed by covering to form the accommodating cavity 15 through the first positioning pin 131 and the second positioning pin 141, wherein the first positioning pin 131 and the second positioning pin 141 not only play a connecting role, but also can realize positioning and limiting functions. In the specific implementation of the embodiment of the utility model, the first positioning pin 131 and the second positioning pin 141 can be arranged in a nested structure, that is, one positioning pin is nested on the outside of the other positioning pin, so as to realize nested connection. Of course, it can also be shown in reference to Figure 7 the right positioning pin connection mode that the outer diameters of the two positioning pins are consistent, and the positioning pins are hollow, the first positioning pin 131 and the second positioning pin 141 match with positioning cylinders or positioning columns, for example, the end of the positioning cylinder matched in the first positioning pin 131 is located in the first positioning pin 131, the end of the positioning cylinder matched in the second positioning pin 141 protrudes from the outer sidewall of the second positioning pin 141 and is located in the first positioning pin 131, and of course, it can also be arranged in the opposite matching structure. Further, the first positioning pin 131 and the second positioning pin 141 in the embodiment of the utility model can be arranged in any matching structure, as long as the connection, positioning and limiting functions can be realized, and the specific structure of the two is not limited in detail in the embodiment of the utility model.

[0100] Referring to Figure 9 , the inner surfaces of the first shell 13 and the second shell 14 are respectively provided with the first track unit 132 and the second track unit 142 for limiting the pincer unit 111, the number of the first track unit 132 and the second track unit 142 is equal to the number of the pincer unit 111, and the first track unit 132 and the second track unit 142 are mirror-symmetric structures. By arranging such a one-to-one limiting structure on the shell, the inventor can realize that each pincer unit 111 is independently operated, and there is no cumulative error between the pincer units 111.

[0101] Referring to Figure 11 , the working process of the above-described curling mechanism provided in the embodiment of the utility model is as follows: the rotating disc 12 rotates, the second stroke track 122 on the rotating disc 12 synchronously transmits force to the limiting shaft 114 on each pincer unit 111, and each pincer unit 111 is gathered or separated along the radial direction under the limiting action of the first track unit 132 on the first shell 13 and the second track unit 142 on the second shell 14, so as to realize the pressure holding treatment of the artificial biological valve.

[0102] In an optional embodiment, referring to Figure 6 , Figure 9 and Figure 10 , the number of the first track units 132 and the number of the second track units 142 are equal to the number of the clamp units 111 respectively; the plurality of the first track units 132 are evenly distributed in a circle on the inner surface of the first shell 13, each of the first track units 132 can include a first sliding groove 133 and a first partition plate 134; the first sliding groove 133 is located in the radial direction of the circle where the plurality of the first track units 132 are located, the first sliding groove 133 and the first partition plate 134 form a second sliding groove 135 between them, the center line of the first sliding groove 133 is parallel to the center line of the second sliding groove 135; the first guide block 115 is located in the first sliding groove 133 and can slide in the first sliding groove 133; the first guide strip 116 is located in the second sliding groove 135 and can slide in the second sliding groove 135; the plurality of the second track units 142 are evenly distributed in a circle on the inner surface of the second shell 14, each of the second track units 142 can include a third sliding groove 143 and a second partition plate 144; the third sliding groove 143 is located in the radial direction of the circle where the plurality of the second track units 142 are located, the third sliding groove 143 and the second partition plate 144 form a fourth sliding groove 145 between them, the center line of the third sliding groove 143 is parallel to the center line of the fourth sliding groove 145; the second guide block 117 is located in the third sliding groove 143 and can slide in the third sliding groove 143; the second guide strip 118 is located in the fourth sliding groove 145 and can slide in the fourth sliding groove 145.

[0103] In the embodiment, one first track unit 132 and another second track unit 142 are mirror-symmetric and together limit one clamp unit 111. Take the first track unit 132 as an example for description, since the first sliding groove 133 is located in the radial direction of the circle where the plurality of the first track units 132 are located, the center line of the first sliding groove 133 is parallel to the center line of the second sliding groove 135, such a structure limits the moving track of the clamp unit 111, under the constraint of each group of the first track units 132 and the second track units 142, referring to Figure 11 , the plurality of the clamp units 111 can only move in the radial direction of the circle to realize the diameter control of the circle surrounded by the plurality of the clamp units 111 to be as small as possible.

[0104] In another embodiment, referring to Figure 9 and Figure 10 , the first sliding groove 133 and the third sliding groove 143 are respectively strip-shaped closed sliding grooves. The closed sliding grooves help to limit the radial sliding stroke of the first guide block 115 and the second guide block 117 matched therewith to limit the stroke range of the clamp unit 111.

[0105] In another embodiment, referring toFigure 9 and Figure 10 As shown, the radius of the circle containing the plurality of first positioning pins 131 is greater than the radius of the circle containing the plurality of first sliding grooves 133; and / or, the radius of the circle containing the plurality of second positioning pins 141 is greater than the radius of the circle containing the plurality of third sliding grooves 143. In this embodiment, the first positioning pins 131 are located outside the first sliding grooves 133, and the second positioning pins 141 are located outside the third sliding grooves 143. In this way, the clamping unit 111 will not be affected by the sliding stroke of the first positioning pins 131 or the second positioning pins 141 during the clamping or separating process, and there will be no intersection of running trajectories between the components, thus avoiding obstruction or wear between the components.

[0106] In another embodiment, refer to Figure 8 As shown, the arc (α) of the arc segment containing the first travel track 121 is 85°–92°; the arc (β) of the arc segment containing the second travel track 122 is 75°–82°. Preferably, the arc (α) of the arc segment containing the first travel track 121 is 87°–89°; the arc (β) of the arc segment containing the second travel track 122 is 78°–79°. In this embodiment of the present invention, combined with… Figure 10 and Figure 11 As shown, since the first positioning pin 131 and the second positioning pin 141 sliding in the first travel track 121 have a certain thickness, their actual sliding range is definitely smaller than the arc range of the arc segment where the first travel track 121 is located. By limiting the arc of the arc segment where the first travel track 121 is located, the inventors ensured that the relative rotation angle of the turntable 12 in the middle with respect to the first housing 13 and the second housing 14 does not exceed 90°, thus avoiding large-angle changes in the direction of force during application and transmission. Furthermore, the arc range of the arc segment where the second travel track 122 is located also prevents large-angle changes in the direction of force when the second travel track 122 applies force to the limiting shaft 114, making the user's operation more effortless.

[0107] In another embodiment, refer to Figure 6 , Figure 8 and Figure 9As shown, the rotary disc 12 is provided with a middle hole 123; the first shell 13 is provided with a first through hole 136 matched with the middle hole 123, and the second shell 14 is provided with a second through hole 146 matched with the middle hole 123; the diameter of the middle hole 123 is not less than the diameter of the first through hole 136, and the diameter of the middle hole 123 is not less than the diameter of the second through hole 146; the first through hole 136, the middle hole 123 and the second through hole 146 are located on the same center line and form a material processing channel. In the embodiment, the material processing channel is formed by the middle part of each component. After the artificial biological valve being pressed and held is processed in the material processing channel, it needs to be taken out from the channel and put into the next artificial biological valve to be pressed and held. In the embodiment of the utility model, preferably, the diameter of the first through hole on the first shell is consistent with the diameter of the second through hole on the second shell. According to the use habit of the user, the first through hole can be used as a sample inlet or a sample outlet, and similarly, the second through hole can also be used as a sample inlet or a sample outlet. In the embodiment, since the diameter of the middle hole is not less than the diameter of the first through hole and the second through hole, the inner diameter of the material processing channel can be effectively prevented from becoming smaller from outside to inside, and the phenomenon of jamming during the conveying of the artificial biological valve being pressed and held can be avoided.

[0108] Based on the same inventive concept, the utility model provides a pressing and holding device, which refers to Figure 12 and Figure 13 As shown, the pressing and holding device can include: a handle 2 and the above-mentioned curling mechanism 1; the handle 2 is connected with the rotary disc 12 of the curling mechanism 1; the side surface of the first shell 13 of the curling mechanism 1 is provided with a first limiting opening 137, and the side surface of the second shell 14 of the curling mechanism 1 is provided with a second limiting opening 147; the first limiting opening 137 and the second limiting opening 147 form a driving limiting opening 16, and the driving limiting opening 16 is located on one side of the vertical center line of the pressing and holding device; the handle 2 extends out of the driving limiting opening 16 and can drive the rotary disc 12 to swing in the driving limiting opening 16; the handle 2 drives the rotary disc 12 to rotate, so as to drive a plurality of clamping units 111 to gather or separate radially.

[0109] The above-mentioned pressure holder provided in the embodiment of the utility model, since the driving limiting opening 16 formed by the first limiting opening 137 on the first shell 13 and the second limiting opening 147 on the second shell 14 is located on one side of the vertical center line of the pressure holder (the curling mechanism 1), when the user uses the pressure holder, the handle 2 can only swing downward to the horizontal direction from one side of the vertical center line of the whole pressure holder, and the swing angle can be controlled within 90 DEG. Compared with the pressure holder in the prior art, the handle can swing within the range of 180 DEG, in the first aspect, the user does not need to change hands or turn hands near the vertical center line during use, which is more in line with the human force direction, effectively guarantees the continuous and stable output of force during pressure holding; in the second aspect, since the force application process is more continuous and stable, the jump phenomenon caused by the change of applied force (change of direction or size) is effectively prevented, thereby avoiding the phenomenon of the valve frame of the artificial biological valve clamping the valve leaflet, the valve frame overlapping and the like caused by the jump, and reducing the influence of human factors on the pressure holding qualified rate; in the third aspect, since the handle is directly connected with the rotating disc located in the middle of the pressure holder, the pincer assembly is gathered or separated through the intermediate rotating disc, compared with the mode that the pincer assembly is driven to move from the two side shells in the prior art, since the precision is limited, it is more stable, avoids the generation of force application error caused by uneven force application on both sides, and improves the artificial biological valve pressure holding yield.

[0110] In another embodiment, referring to Figure 13 The pressure holder can further include a base 3, and the first shell 13 and the second shell 14 in the curling mechanism 1 are detachably installed in an installation groove 31 on the base 3 after being overlapped. The structure of the base 3 in the embodiment is to stably install the overall structure of the pressure holder, so that the pressure holder can be uniformly stressed when used by the user, and the base 3 can effectively support.

[0111] In another embodiment, referring to Figure 13 The pressure holder can further include a first stopper 4, the first stopper 4 is located at one end of the driving limiting opening 16 away from the vertical center line of the pressure holder, and a limiting insertion groove 32 is formed on the base 3, and the first stopper 4 is detachably inserted into the limiting insertion groove 32. The first stopper 4 in the embodiment is used to prevent the artificial biological valve from being deformed, damaged or punctured by the balloon due to excessive force or excessive pressure holding. As long as the first stopper 4 is located at one end of the driving limiting opening 16 away from the vertical center line of the pressure holder to achieve the blocking and limiting effect, the first stopper 4 in the embodiment is arranged on the base 3 through the limiting insertion groove 32. It should be noted that the bottom of the first stopper 4 in the embodiment can be in the shape of a cross or a T, and the corresponding limiting insertion groove 32 also has a matching shape, and the first stopper 4 in the embodiment can prevent the handle 2 from being swung downward too much when being pressed.

[0112] In another embodiment, referring to Figure 13 As shown in the figure, the two sides of the slot 31 on the base 3 are provided with a first slot 33 and a second slot 34, the positions of the first slot 33 and the second slot 34 match the positions of the material processing channel formed by the middle hole 123 on the rotating disc 12, the first through hole 136 on the first shell 13 and the second through hole 146 on the second shell 14; the pressure holder can further comprise: two sets of support assemblies 5; each set of support assemblies 5 can comprise: a guide column 51, a guide slot 52 and a pressing plate 53; two guide columns 51 are respectively detachably inserted into the first slot 33 and the second slot 34; two guide slots 52 are respectively connected with the two guide columns 51, and the positions of the two guide slots 52 match the positions of the material processing channel; two pressing plates 53 are respectively clamped with the two guide slots 52, and the pressing plate 53 can slide on the guide slot 52; the shape surrounded by the guide slot 52 clamped with the pressing plate 53 matches the shape of the catheter delivery assembly connected with the crimped artificial biological valve 10 (referring to FIG. 1).

[0113] The support assembly 5 in this embodiment is used to place the catheter delivery assembly connected with the artificial biological valve on the guide slot 52 of one support assembly 5, and then clamp the pressing plate 53, and move the catheter delivery assembly radially stably to the material processing channel by pushing the pressing plate 53, which helps to accurately position the artificial biological valve before crimping. The support assembly 5 in this embodiment can be provided with two sets, respectively located at the two ends of the material processing channel, so that the user who uses different hands to crimp can perform crimping operation from different directions.

[0114] In another embodiment, referring to Figure 13 As shown in the figure, the pressing plate 53 is provided with a limiting lug 54, and the size of the limiting lug 54 is greater than the hole diameter of the first through hole 136 on the first shell 13 and the second through hole 146 on the second shell 14. The limiting lug 54 in this embodiment can play a limiting role, so as to control the sliding stroke of the pressing plate 53 on the guide slot 52, and accurately position the position of the artificial biological valve.

[0115] Before performing the TAVR operation, the crimping steps are as follows:

[0116] (1) Take out the crimping device, correctly install the first stopper and the support assembly.

[0117] (2) Remove the label on the artificial biological valve, and in a sterile environment, according to the correct direction of the operation, wrap the artificial biological valve on the balloon of the catheter delivery assembly; lift the handle of the crimping device upward, place the artificial biological valve on the catheter delivery assembly balloon on the guide slot, then use the pressing plate to clamp, and then push the pressing plate towards the material processing channel, and the pressing plate drives the artificial biological valve to move radially stably to the material processing channel.

[0118] (3) Before pressing, make sure the leaflet opening direction of the artificial biological valve is correct, and pay attention to observe the accurate positioning of the artificial biological valve before slowly pressing the handle. Keep for 5s after completing the pressing operation, and press the handle twice.

[0119] (4) Remove the balloon protection sleeve, flush the loading sheath with heparin water, and then completely cover the loaded balloon in the loader. The loader covers the balloon and the sharp end, and the protection steel wire is extracted.

[0120] (5) After pressing, push the artificial biological valve into the guide groove on the guide column, and wait for use.

[0121] It should be noted that the whole artificial biological valve cannot be placed for more than 15 minutes after loading, so as to avoid causing damage to the leaflets and affecting the expected function after implantation.

[0122] In another embodiment, as shown in Figures 5-11 , the pressing device can further include: a second stopper 6; the second stopper 6 is located in the accommodating cavity 15, is connected with the first shell 13 and the second shell 14 respectively, and is matched with the position of the driving limiting opening 16; the edge of the first shell 13 extends to form a first support seat 138, and the edge of the second shell 14 extends to form a second support seat 148; in the state that the first shell 13 and the second shell 14 are closed, the first support seat 138 and the second support seat 148 form a support base 7 to support the pressing device.

[0123] The difference between the embodiment and the above-mentioned embodiment is that the structure of the second stopper in the embodiment is different from that of the first stopper in the above-mentioned embodiment. The second stopper in the embodiment is matched with the position of the driving limiting opening, is located in the accommodating cavity formed by the first shell and the second shell, and is installed on the first shell and the second shell. The second stopper is arc-shaped as a whole, and the opening angle of the arc-shaped second stopper can control the rotation of the handle within 90°, so as to further limit the position of the handle, so that the handle can only be rotated to the horizontal position.

[0124] Based on the same inventive concept, the utility model embodiment further provides a pressing device, as shown in Figure 17 and Figure 18 , the pressing device can include: a gear assembly 8 and the above-mentioned curling mechanism 1; the first shell 13 and / or the second shell 14 of the curling mechanism 1 is provided with a mounting position 17, one end of the gear assembly 8 is matched with the turntable 12 of the curling mechanism 1, and the other end extends out of the mounting position 17; the gear assembly 8 drives the turntable 12 to rotate, so as to drive a plurality of clamping units 111 in the curling mechanism 1 to gather or separate radially.

[0125] It should be noted that, as shown in Figure 18As shown, the mounting hole 17 in the embodiment can be only a mounting hole formed on the first shell or the second shell; or can be a mounting hole formed on one shell (for example, the first shell) and a groove formed on the inner surface of the other shell (the second shell), the mounting hole facilitating the extension of one end of the gear assembly, and the groove facilitating the axial limiting of the other end of the gear assembly.

[0126] The pressing device provided in the embodiment has the following advantages. First, the rotating disc is the main body for driving the movement of the clamping assembly, and the rotating disc is directly driven by the gear assembly through cooperation of the second stroke track and the clamping unit in the clamping assembly. Such a structure makes the gear assembly more stable when exerting force and more stable during force transmission. Second, the continuous and stable force exertion avoids the phenomenon of jumping caused by changes (direction or size changes) in the exertion of force, thereby avoiding the phenomenon of the valve frame of the artificial biological valve clamping the valve leaflets, the overlapping of the valve frames, and the like, and reducing the influence of human factors on the pressing qualification rate. Third, since the rotating disc is directly driven by the gear assembly to rotate, the clamping assembly is brought together or separated through the rotating disc in the middle, which avoids the uneven force on the end of the clamping unit compared to the prior art in which the rotating disc is located on one side of the center line of the entire device. Fourth, the more stable gear assembly avoids the generation of force exertion errors caused by uneven force on the end, thereby improving the pressing yield of the artificial biological valve.

[0127] In another embodiment, referring to Figure 17 and Figure 18 As shown, the gear assembly 8 can include a rotating knob 81, a rotating shaft 82, and a driving gear 83. The rotating disc 12 in the curling mechanism 1 is provided with a gear tooth 124 on the periphery thereof. The driving gear 83 is engaged with the gear tooth 124 on the periphery of the rotating disc 12. One end of the rotating shaft 82 is connected with the driving gear 83, and the other end extends out of the mounting hole 17 and is connected with the rotating knob 81. The driving gear 83 of the gear assembly 8 drives the rotating disc 12 to rotate, so as to drive the radial gathering or separation of the plurality of clamping units 111 in the curling mechanism 1. In the embodiment, the gear tooth on the periphery of the rotating disc is located at the vertical center position of the rotating disc, and the driving gear is stably engaged with the gear tooth provided on the periphery of the rotating disc. The rotating disc is driven to rotate through the rotation of the rotating knob, the rotating shaft, and the driving gear. Since the gear tooth and the rotating disc are located at the center of the entire device, the force exertion and force transmission are more stable than in the prior art.

[0128] In another embodiment, referring to Figure 17 and Figure 18As shown, the gear assembly 8 can include: a rotating knob 81, a rotating shaft 82, a driving gear 83 and a gear ring 84; the gear ring 84 is nested outside the rotating disc 12 in the curling mechanism 1, the driving gear 83 is engaged with the gear ring 84; one end of the rotating shaft 82 is connected with the driving gear 83, and the other end extends out of the installation position 17 and is connected with the rotating knob 81; the gear ring 84 of the gear assembly 8 drives the rotating disc 12 to rotate, so as to drive a plurality of clamping units 111 in the curling mechanism 1 to gather or separate radially. The difference between the embodiment and the above-mentioned embodiment is that the gear assembly includes a gear ring, and the gear ring is nested outside the rotating disc. Such a structure plays the same role as the teeth on the circumference of the rotating disc. Correspondingly, since the gear ring and the rotating disc are located at the center position of the whole device, the force exertion and force transmission are more stable than the prior art in which the force is exerted from the rotating disc located on one side.

[0129] In another embodiment, referring to Figures 5-11 As shown, the edge of the first shell 13 extends to form a first support seat 138, and the edge of the second shell 14 extends to form a second support seat 148; in the state that the first shell 13 and the second shell 14 are closed, the first support seat 138 and the second support seat 148 form a support base 7 to support the pressure holder. The structure of the support base in the embodiment can make the structure of the pressure holder more stable, and facilitate the user to use the device to bear uniform force.

[0130] The three pressure holders provided in the embodiment only need one user to complete the sample sending, pressure holding and sample taking operations, compared with the prior device which needs two users (medical staff) to separately send samples and take samples.

[0131] The artificial biological valve in the third embodiment of the application number 201920458990.1 is subjected to the pressure holding and curling treatment by using the pressure holder in the embodiment, and none of the artificial biological valves is clamped with the valve leaflets or overlapped with the valve frame; the artificial biological valve during the pressure holding process and after the pressure holding is measured by using a caliper and compared with a columnar mold, and the artificial biological valve is round, the overall yield is high, and there is no jumping part phenomenon.

[0132] Based on the same inventive concept, the utility model embodiment further provides a pressure holding system, which can include: a catheter conveying assembly and the above-mentioned pressure holder; the artificial biological valve subjected to the pressure holding and curling is used for being connected with one end of the catheter conveying assembly; the artificial biological valve subjected to the pressure holding and curling is subjected to the pressure holding and curling treatment by using the pressure holder.

[0133] Based on the same inventive concept, the utility model embodiment further provides a method for applying the above-mentioned pressure holder to the artificial biological valve to perform the pressure holding and curling treatment.

[0134] The specific implementation of the above-mentioned pressing holder and application method can refer to the detailed description of the curling mechanism, and the embodiments of the utility model will not be described here.

[0135] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. The disclosure is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. A clamp unit, characterized by The clamp unit comprises a first clamp body, a second clamp body, a limiting shaft, a first guide block, a first guide strip, a second guide block and a second guide strip; one end of the first clamp body and the second clamp body is integrally connected, and the other end is detachably connected through the limiting shaft; the first guide block and the first guide strip are located on the outer side of the first clamp body, and the second guide block and the second guide strip are located on the outer side of the second clamp body; The first clamp body and the second clamp body are mirror-symmetric, and the second clamp body comprises a first outer ridge, a second outer ridge, a third outer ridge, a fourth outer ridge, a first front side, a second front side and a third front side in sequence; the length of the second outer ridge is greater than the length of the second front side, and the long axis center line of the second outer ridge, the second front side and the first guide strip are parallel; the included angle between the first outer ridge and the second outer ridge is 150°, the included angle between the second outer ridge and the third outer ridge is 150°, the included angle between the third outer ridge and the fourth outer ridge is 105°, the included angle between the fourth outer ridge and the first front side is 30°, the included angle between the first front side and the second front side is 105°, and the included angle between the second front side and the third front side is 150°.

2. The jaw unit of claim 1, wherein The first outer ridge and the second outer ridge are transitioned by a round corner, the second outer ridge and the third outer ridge are transitioned by a round corner, the third outer ridge and the fourth outer ridge are transitioned by a round corner, the first front side and the second front side are transitioned by a round corner, and the second front side and the third front side are transitioned by a round corner.

3. The jaw unit according to claim 1 or 2, characterized in that The limiting shaft penetrates the first clamp body and the second clamp body respectively and is connected with the first guide block and the second guide block respectively.

4. A curling mechanism characterized by, The curling mechanism is used for a pressure holder, and the curling mechanism comprises a clamp assembly, a rotating disc, a first shell and a second shell. A plurality of first stroke tracks and a plurality of second stroke tracks are arranged on the rotating disc; the plurality of first stroke tracks are regularly arranged in the form of a fan and close to the edge of the rotating disc, and the plurality of second stroke tracks are arranged in the form of inclined radiation and close to the center of the rotating disc; The clamp assembly comprises a plurality of clamp units as claimed in any one of claims 1-3, and the number of the clamp units is equal to the number of the second stroke tracks; one end of the first clamp body and the second clamp body of the clamp unit away from the second stroke track is integrally connected, and the other end close to the second stroke track is slidably connected with the second stroke track through the limiting shaft of the clamp unit; The inner surface of the first shell is provided with a first positioning pin matched with the first stroke track, and a first track unit matched with the first guide block and the first guide strip in the clamp assembly respectively; and the inner surface of the second shell is provided with a second positioning pin matched with the first stroke track and the first positioning pin respectively, and a second track unit matched with the second guide block and the second guide strip in the clamp assembly respectively. The first shell and the second shell cover form a containing cavity, the rotating disc and the clamp assembly are located in the containing cavity, and the first shell and the second shell are connected through the first positioning pin and the second positioning pin; the rotating disc rotates to act on the limiting shaft, respectively drives the first guide block and the first guide strip to slide on the first track unit, and drives the second guide block and the second guide strip to slide on the second track unit, so as to drive a plurality of clamp units to be radially gathered or separated.

5. The crimping mechanism of claim 4, wherein, The number of the first track units and the number of the second track units are equal to the number of the clamp units respectively; A plurality of the first track units are uniformly distributed in a circular shape on the inner surface of the first shell, each of the first track units comprises a first sliding groove and a first partition plate; the first sliding groove is located in the radial direction of the circle where the plurality of first track units are located, a second sliding groove is formed between the first sliding groove and the first partition plate, and the center line of the first sliding groove is parallel to the center line of the second sliding groove; the first guide block is located in the first sliding groove and can slide in the first sliding groove; the first guide strip is located in the second sliding groove and can slide in the second sliding groove; A plurality of the second track units are uniformly distributed in a circular shape on the inner surface of the second shell, each of the second track units comprises a third sliding groove and a second partition plate; the third sliding groove is located in the radial direction of the circle where the plurality of second track units are located, a fourth sliding groove is formed between the third sliding groove and the second partition plate, and the center line of the third sliding groove is parallel to the center line of the fourth sliding groove; the second guide block is located in the third sliding groove and can slide in the third sliding groove; the second guide strip is located in the fourth sliding groove and can slide in the fourth sliding groove.

6. The crimping mechanism of claim 5, wherein, The first sliding groove and the third sliding groove are respectively strip-shaped closed sliding grooves.

7. The crimping mechanism of claim 5, wherein, The radius of the circle where the plurality of first positioning pins are located is greater than the radius of the circle where the plurality of first sliding grooves are located; and / or the radius of the circle where the plurality of second positioning pins are located is greater than the radius of the circle where the plurality of third sliding grooves are located.

8. The crimping mechanism of claim 4, wherein, The arc of the arc segment where the first stroke track is located is 85°-92°; and the arc of the arc segment where the second stroke track is located is 75°-82°.

9. The crimping mechanism of claim 8, wherein, The arc of the arc segment where the first stroke track is located is 87°-89°; and the arc of the arc segment where the second stroke track is located is 78°-79°.

10. The crimping mechanism according to any one of claims 4 to 9, characterized in that The rotating disc is provided with a middle hole; the first shell is provided with a first through hole matched with the middle hole, and the second shell is provided with a second through hole matched with the middle hole; the aperture of the middle hole is not less than the aperture of the first through hole, and the aperture of the middle hole is not less than the aperture of the second through hole; the first through hole, the middle hole and the second through hole are located on the same center line and form a material processing channel.

11. A crimping device characterized by comprising: The pressure holder comprises a handle and a curling mechanism as claimed in any one of claims 4-10. The handle is connected with a rotating disc of the curling mechanism; a first limiting opening is formed in a side of a first housing of the curling mechanism, a second limiting opening is formed in a side of a second housing of the curling mechanism, the first limiting opening and the second limiting opening form a driving limiting opening, the driving limiting opening is located on one side of a vertical center line of the pressure holder; the handle extends out of the driving limiting opening and can drive the rotating disc to swing in the driving limiting opening; the handle drives the rotating disc to rotate, so as to drive a plurality of the clamp units to be radially gathered or separated.

12. The press from claim 11, wherein, The pressure holder further comprises a base; a mounting groove is formed in the base; the first housing and the second housing of the curling mechanism are detachably mounted in the mounting groove after being covered.

13. The press from claim 12, wherein, Further comprising: a first stopper; the first stopper is located at an end of the driving limiting opening away from the vertical center line of the pressure holder; a limiting slot is formed in the base; the first stopper is detachably inserted into the limiting slot.

14. The press from claim 12 or 13, characterized in that First and second slots are arranged on both sides of the mounting groove of the base; positions of the first and second slots match positions of the middle hole on the rotating disc, the first through hole on the first housing and the second through hole on the second housing to form a material processing channel; The pressure holder further comprises two groups of supporting assemblies; each group of the supporting assemblies comprises a guide column, a guide slot and a pressing plate; the two guide columns are respectively detachably inserted into the first and second slots; the two guide slots are respectively connected with the two guide columns and positions of the two guide slots match the positions of the material processing channel; the two pressing plates are respectively engaged with the two guide slots and the pressing plates can slide on the guide slots; shapes of the pressing plates engaged with the guide slots match a shape of a catheter delivery assembly connected with the artificial biological valve to be pressed and curled.

15. The press from claim 14, wherein, Limiting ears are arranged on the pressing plates; sizes of the limiting ears are greater than hole diameters of the first through hole on the first housing and the second through hole on the second housing.

16. The press from claim 11, wherein, The pressure holder further comprises a second stopper; the second stopper is located in the accommodating cavity and connected with the first housing and the second housing respectively and matches the position of the driving limiting opening; edges of the first housing extend to form a first supporting seat and edges of the second housing extend to form a second supporting seat; in a state that the first housing and the second housing are covered, the first supporting seat and the second supporting seat form a supporting base to support the pressure holder.

17. A crimping device characterized by The pressure holder comprises a gear assembly and the curling mechanism as claimed in any one of claims 4 to 10; mounting positions are formed in the first housing and / or the second housing of the curling mechanism; one end of the gear assembly is matched with the rotating disc of the curling mechanism and the other end extends out of the mounting position; the gear assembly drives the rotating disc to rotate, so as to drive a plurality of the clamp units in the curling mechanism to be radially gathered or separated.

18. The press from claim 17, wherein, The gear assembly comprises a rotating knob, a rotating shaft, a driving gear and a gear ring; the gear ring is nested outside the rotating disc in the curling mechanism, the driving gear is engaged with the gear ring; one end of the rotating shaft is connected with the driving gear, and the other end extends out of the installation position and is connected with the rotating knob; the gear ring of the gear assembly drives the rotating disc to rotate, so as to drive a plurality of the clamp units in the curling mechanism to gather or separate radially.

19. The press from claim 17, wherein, The gear assembly comprises a rotating knob, a rotating shaft and a driving gear; the periphery of the rotating disc in the curling mechanism is provided with a gear; the driving gear is engaged with the gear on the periphery of the rotating disc; one end of the rotating shaft is connected with the driving gear, and the other end extends out of the installation position and is connected with the rotating knob; the driving gear of the gear assembly drives the rotating disc to rotate, so as to drive a plurality of the clamp units in the curling mechanism to gather or separate radially.

20. The press according to any one of claims 17 to 19, characterized in that The edge of the first shell extends to form a first support seat, and the edge of the second shell extends to form a second support seat; in the state that the first shell and the second shell are closed, the first support seat and the second support seat form a support base to support the pinch gripper.

21. A compression system characterized by, The application relates to a pinch gripper for a curling and pinching artificial biological valve. The application relates to a pinch gripper for a curling and pinching artificial biological valve.

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