Pressing and holding device and pressing and holding system

Abstract

The utility model discloses a pressing and holding device and a pressing and holding system. The pressing and holding device can comprise a forceps holder assembly, a first shell, a second shell, a rotating disc and a handle connected with the rotating disc. A first stroke track and a second stroke track are arranged on the turntable; the forceps clip assembly comprises forceps clip units, and the number of the forceps clip units is the same as that of the second stroke rails; a first positioning pin and a first rail unit are arranged on the inner surface of the first shell; a second positioning pin and a second rail unit are arranged on the inner surface of the second shell; the first shell and the second shell are closed to form a containing cavity, and the rotating disc and the forceps clip assembly are located in the containing cavity. A first limiting opening formed in the side face of the first shell and a second limiting opening formed in the side face of the second shell form a driving limiting opening, and the driving limiting opening is located on one side of the vertical center line of the pressing and holding device. And the handle extends out of the driving limiting opening and can drive the turntable to swing in the driving limiting opening so as to drive the plurality of forceps clip units to be radially gathered or separated.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a gripper and gripping system. Background Technology

[0002] Heart valve disease is a common heart condition. Previously, for patients with aortic stenosis, only traditional open-heart surgery was an option. However, traditional open-heart surgery has drawbacks such as significant trauma, long operation time (generally 3-4 hours), severe postoperative pain, and slow patient recovery. With the increasing aging population, the incidence of heart valve disease is rising, and the risks of open-heart surgery are generally higher for the elderly. Transcatheter aortic valve replacement (TAVR) is a minimally invasive procedure that involves implanting an artificial bioprosthetic valve inside the existing diseased aortic valve while preserving it. It is usually performed via femoral artery puncture under catheter guidance, similar to coronary artery stenting via femoral artery puncture.

[0003] The compression device is an auxiliary tool used during the loading and deployment of artificial bioprosthetic valves. Before implantation, the artificial bioprosthetic valve needs to be installed in a curled-up state at the distal end of the catheter delivery assembly. The compression device is used to compress the artificial bioprosthetic valve, reducing its diameter, so that it can be delivered through the catheter delivery assembly to the lesion site of the heart valve via blood vessels.

[0004] The compressed artificial bioprosthetic valve refers to a "stent-supported valve" (the artificial bioprosthetic valve in Example 3 of application number 201920458990.1), referring to... Figure 1A As shown, this "stent-supported valve" has a stent frame or stent that provides the main structural support in its expanded state. The stent frame or stent (made of cobalt-chromium alloy) is an expandable tubular structure that can be expanded by a balloon or by its inherent elasticity. The valve structure mounted on the stent frame or stent is formed from biomaterials. In this example, the biomaterial is three bovine pericardial leaflets, which are prepared from healthy bovine pericardium through chemical modification. The entire stent-supported valve consists of three bovine pericardial leaflets, sutures, an outer skirt, an inner skirt, and a stent. To maintain its improved function after implantation, these valves are typically preserved in a preservation solution in an expanded state. A few minutes before transplantation, the stent-supported valve needs to be compressed and curled using a compression device in the operating room.

[0005] Existing compression devices, when used to compress and curl the aforementioned artificial bioprosthetic valves, suffer from drawbacks such as low yield rate and high failure rate of the compressed artificial bioprosthetic valves. Utility Model Content

[0006] To ensure stability during force application and reduce the probability of component slippage, this invention provides a gripper and a gripping system.

[0007] In a first aspect, the present invention provides a gripper, which may include: a clamping assembly, a first housing and a second housing. The gripper may also include: a turntable and a handle connected to the turntable.

[0008] The turntable is provided with a plurality of first travel tracks and a plurality of second travel tracks; the plurality of first travel tracks are arranged in a regular fan shape and close to the edge of the turntable, and the plurality of second travel tracks are arranged in an inclined radial shape and close to the center of the turntable; the clamping assembly includes a plurality of clamping units, the number of clamping units being the same as the number of second travel tracks;

[0009] The inner surface of the first housing is provided with a first positioning pin that matches the first travel track, and a first track unit that matches the clamping unit respectively; the inner surface of the second housing is provided with a second positioning pin that matches the first travel track and the first positioning pin respectively, and a second track unit that matches the clamping unit respectively.

[0010] The first housing and the second housing are closed to form a receiving cavity, in which the turntable and the clamping assembly are located. The first housing and the second housing are connected by the first positioning pin and the second positioning pin. A first limiting opening is provided on the side of the first housing, and a second limiting opening is provided on the side of the second housing. The first limiting opening and the second limiting opening form a driving limiting opening, which is located on one side of the vertical center line of the gripper. The handle extends out of the driving limiting opening and can drive the turntable to swing within the driving limiting opening. The handle drives the turntable to rotate, thereby driving the plurality of clamping units to radially converge or separate.

[0011] In one embodiment, the gripper may further include: a base and a first stop; the base has a mounting groove that matches the first housing and the second housing, and the first housing and the second housing are detachably installed in the mounting groove after being closed;

[0012] The first stop is located at the end of the drive limiting opening away from the vertical center line of the gripper.

[0013] In one embodiment, a limiting slot is provided on the base, and the first stop is detachably inserted into the limiting slot.

[0014] In one embodiment, the turntable has a central hole; the first housing has a first through hole that matches the central hole, and the second housing has a second through hole that matches the central hole; the first through hole, the central hole, and the second through hole are located on the same center line and form a material processing channel;

[0015] The base has a first slot and a second slot on both sides of the mounting groove, and the positions of the first slot and the second slot match the position of the material processing channel.

[0016] The pressure gripper further includes: two sets of support components; each set of support components includes: a guide post, a guide groove, and a pressure plate; the two guide posts are detachably inserted into the first slot and the second slot, respectively; the two guide grooves are respectively connected to the two guide posts, and the positions of the two guide grooves match the positions of the material processing channel; the two pressure plates are respectively engaged with the two guide grooves, and the pressure plates can slide on the guide grooves; the shape formed by the pressure plates engaging the guide grooves matches the shape of the catheter delivery assembly connecting the compressed and curled artificial bioprosthetic valve.

[0017] In one embodiment, the pressure plate is provided with a limiting ear, the size of which is larger than the diameter of the first through hole and the second through hole.

[0018] In one embodiment, the gripper may further include: a second stop; the second stop is located within the receiving cavity, connected to the first housing and the second housing respectively, and matched with the position of the drive limiting opening;

[0019] The edge of the first housing extends to form a first support base, and the edge of the second housing extends to form a second support base; when the first housing and the second housing are closed, the first support base and the second support base form a support base to support the gripper.

[0020] In one embodiment, the clamping unit may include: a first clamping body, a second clamping body, a limiting shaft, a first guide block, a first guide strip, a second guide block, and a second guide strip; the first clamping body and the second clamping body are integrally connected at their ends away from the second travel track, and their ends near the second travel track are slidably connected to the second travel track via the limiting shaft; the first guide block and the first guide strip are located on the outer side of the first clamping body, and the second guide block and the second guide strip are located on the outer side of the second clamping body; the turntable rotates to act on the limiting shaft, thereby driving the first guide block and 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 clamping units to radially converge or separate.

[0021] In one embodiment, the number of the first track units and the number of the second track units are each equal to the number of the clamping units;

[0022] Multiple first track units are evenly distributed in a circular shape on the inner surface of the first housing. Each first track unit may include: a first groove and a first partition plate; the first groove is located radially in the circle containing the multiple first track units, and a second groove is formed between the first groove and the first partition plate, with the center line of the first groove parallel to the center line of the second groove; the first guide block is located in the first groove and can slide in the first groove; the first guide strip is located in the second groove and can slide in the second groove.

[0023] Multiple second track units are evenly distributed in a circular shape on the inner surface of the second housing. Each second track unit may include: a third slide groove and a second partition plate; the third slide groove is located radially in the circle containing the multiple second track units, and a fourth slide groove is formed between the third slide groove and the second partition plate, with the center line of the third slide groove being parallel to the center line of the fourth slide groove; the second guide block is located in the third slide groove and can slide in the third slide groove; the second guide strip is located in the fourth slide groove and can slide in the fourth slide groove.

[0024] In one embodiment, the first slide and the third slide are both strip-shaped closed slides; the radius of the circle containing the plurality of first positioning pins is greater than the radius of the circle containing the plurality of first slides; and / or, the radius of the circle containing the plurality of second positioning pins is greater than the radius of the circle containing the plurality of third slides.

[0025] In one embodiment, the limiting shaft passes through the first clamp body and the second clamp body respectively, and is connected to the first guide block and the second guide block respectively.

[0026] In one embodiment, the arc of the first travel track is 85° to 92°; the arc of the second travel track is 75° to 82°.

[0027] In a preferred embodiment, the arc of the first travel track is 87° to 89°; the arc of the second travel track is 78° to 79°.

[0028] In a second aspect, embodiments of the present invention provide a pressure-gripping system, which may include: a catheter delivery assembly and a pressure-gripping device as described in the first aspect; a pressure-gripping and curled artificial bioprosthetic valve for connection to one end of the catheter delivery assembly; the pressure-gripping and curled artificial bioprosthetic valve is pressure-gripping and curled by the pressure-gripping device.

[0029] The beneficial effects of the above-mentioned technical solutions provided by the embodiments of this utility model include at least the following:

[0030] This utility model embodiment provides a gripper and a gripping system. The gripper has a drive limiting opening formed by a first limiting opening on the first housing and a second limiting opening on the second housing, which is located on one side of the vertical center line of the gripper. In this way, when the user uses the gripper, the handle can only swing downward from one side of the vertical center line of the entire gripper to the horizontal direction, and the swing angle can be controlled within 90°. Compared to existing pressure grippers with handles that can swing within a 180° range, firstly, users do not need to switch or turn their hands near the vertical center line during use, which is more in line with the direction of human force application and effectively ensures a continuous and stable force output during pressure application; secondly, because the force application is more continuous and stable, it effectively prevents the phenomenon of component jumping due to changes in the applied force (changes in direction or magnitude), thereby avoiding phenomena such as valve frame clamping the leaflet or valve frame overlap caused by component jumping, reducing the impact of human factors on the pressure gripping pass rate; thirdly, because the handle is directly connected to the turntable located in the middle of the pressure gripper, the clamping components are brought together or separated through the turntable. Compared to the existing technology that drives the clamping components from both sides, this method is more stable due to precision limitations, avoiding the force application error caused by uneven force application on both sides, and improving the yield rate of artificial bioprosthetic valve pressure gripping.

[0031] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0032] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0034] Figure 1A This is a schematic diagram of an existing artificial bioprosthetic valve structure.

[0035] Figure 1B This is one of the structural diagrams of a reparative valve retraction device in the prior art;

[0036] Figure 1C for Figure 1B Exploded view;

[0037] Figure 1D for Figure 1B A sectional view;

[0038] Figure 1E This is the second exploded view of the structure of a reparative valve curling device in the prior art;

[0039] Figure 2 This is one of the structural diagrams of the gripper provided in the embodiments of this utility model;

[0040] Figure 3 for Figure 2 Exploded view;

[0041] Figure 4 for Figure 2 Cross-sectional view in the vertical direction;

[0042] Figure 5 This is a schematic diagram of the turntable structure provided in the embodiments of this utility model;

[0043] Figure 6 This is one of the overall structural diagrams of the gripper provided in the embodiments of this utility model;

[0044] Figure 7 for Figure 6 Exploded view;

[0045] Figure 8 This is the second overall structural diagram of the gripper provided in the embodiments of this utility model;

[0046] Figure 9 for Figure 8 Partial region decomposition diagram;

[0047] Figure 10 This is a structural diagram of the turntable, handle, and second stop provided in the embodiments of this utility model;

[0048] Figure 11 This is a perspective structural view of the clamping assembly provided in the embodiments of this utility model;

[0049] Figure 12 This is an orthographic projection view of the clamping assembly provided in the embodiments of this utility model;

[0050] Figure 13 This is a structural diagram of the clamping unit provided in the embodiments of this utility model;

[0051] Figure 14 This is a structural diagram of the first and second housings provided in the embodiments of this utility model;

[0052] Figure 15 This is a structural diagram of the clamping assembly and the second housing provided in the embodiments of this utility model;

[0053] Figure 16 This is a structural diagram showing the clamping assembly in its open and closed states as provided in this embodiment of the utility model;

[0054] Wherein, 1-pressure gripper; 2-artificial bioprosthetic valve;

[0055] 11-Clamping assembly; 12-First housing; 13-Second housing; 14-Turntable; 15-Handle; 16-Receiving cavity; 17-Base; 18-First stop; 19-Support assembly; 20-Second stop; 21-Drive limiting opening; 22-Support base;

[0056] 111-Clamping unit; 112-First clamping body; 113-Second clamping body; 114-Limiting shaft; 115-First guide block; 116-First guide bar; 117-Second guide block; 118-Second guide bar;

[0057] 121-First positioning pin; 122-First track unit; 123-First limiting opening; 124-First through hole; 125-First support base; 126-First slide groove; 127-First partition plate; 128-Second slide groove;

[0058] 131-Second locating pin; 132-Second track unit; 133-Second limiting opening; 134-Second through hole; 135-Second support base; 136-Third slide groove; 137-Second partition plate; 138-Fourth slide groove;

[0059] 141 - First stroke track; 142 - Second stroke track; 143 - Center hole;

[0060] 171 - Mounting slot; 172 - Limiting slot; 173 - First slot; 174 - Second slot;

[0061] 191-Guide post; 192-Guide groove; 193-Pressure plate; 194-Limiting ear;

[0062] 1131 - First lateral ridge; 1132 - Second lateral ridge; 1133 - Third lateral ridge; 1134 - Fourth lateral ridge; 1135 - First anterior lateral side; 1136 - Second anterior lateral side; 1137 - Third anterior lateral side;

[0063] 1001-Clamping clamp; 1002-Housing housing accessory; 1003-Rotating disc; 1004-Base accessory; 1005-Handle; 1006-Stop component; 1007-Central shaft; 1008-Cam component; 1009-Screw rail; 1010-Guide groove; 1011-Secondary groove; 1012-Guide plate; 1013-Guide ridge; 1014-Valve; 1015-Clamping gap; 1016-Rotating handle; 1017-Shaft; 1018-Pin gear; 1019-Large gear. Detailed Implementation

[0064] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0065] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," and "rear," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0066] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0067] Reference Figures 1B to 1EAs shown, the existing clamping gripper 1001 is configured about a central axis 1007, with housing fittings 1002 on either side of the clamp 1001. Each portion of the housing fitting 1002 includes a basic disc-shaped element (rotating disc 1003) with radially oriented annular walls and an outer edge extending toward the opposite portion of the housing fitting 1002; the housing fittings 1002, numbered sequentially, restrict each clamp 1001 to allow only radial movement. Each clamp 1001 preferably has a pair of guide plates 1012, which are positioned near the two radially outermost axes 1017 sides of the clamp 1001 and oriented outward. The guide plates 1012 extend through and interact with guide grooves 1010 within each fixed housing fitting 1002, thereby constraining the linear sliding movement of the clamp 1001 toward and away from the central axis 1007. Extended guide ridges 1013 extend from both sides of each clamp 1001, engaging parallel sub-grooves 1011 located within each retaining housing fitting 1002. All four guide plates 1012 and guide ridges 1013 in each individual clamp 1001 are parallel, as are the four corresponding guide grooves 1010 and sub-grooves 1011. The final assembly constrains the clamp 1001 within the housing fitting 1002 with the movement of the guide grooves 1010 and sub-grooves 1011, which are generally radially oriented. Specifically, the guide groove 1010 lies on a radial line extending outward from the center of the coiling mechanism, while the sub-grooves 1011 are parallel to but slightly spaced from it. The clamp gap 1015 closes to the extent that the supported valve 1014 is fully coiled.

[0068] Both rotating disks 1003 have axle 1017 necks for rotation about a central axis 1007 on adjacent housing fittings 1002. A handle 1005 is connected to the two rotating disks 1003 via a bracket structure to enable their cooperative rotation. Helical notches, grooves, or rails in each rotating disk 1003 are provided on each side of the winding device to convert the rotational motion of the lever handle 1005 into linear motion of the clamps 1001. Ideally, helical rails 1009 are formed between helical walls extending inward from the rotating disks 1003. The helical rails 1009 interact with actuating pin-shaped cam members 1008 located on both sides of each clamp 1001, specifically extending outward from each guide plate 1012. For each clamp 1001, four helical rails 1009 act on four cam members 1008.

[0069] Reference Figure 1EAs shown, instead of using a lever handle 1005, the actuator includes a rotary handle 1016 connected to a shaft 1017 and a pinion 1018 to rotate a separate rotary disk 1003. The pinion 1018 meshes with a large gear 1019 on the rotary disk 1003. An actuation cam member 1008, located only on the clamping side 1001, is coupled to a single helical rail 1009 and guided by guide slots 1010 and sub-slots 1011 coupled to guide plates 1012 and guide ribs 1013.

[0070] The inventor used, for example Figures 1B to 1E During the application of the pressure gripper (reparative valve curling device), it was found that the handle can swing within a 180° range when gripping the artificial bioprosthetic valve. This necessitates a hand-switching process during force application, leading to decreased force stability and an increased probability of valve slippage. Furthermore, in existing technologies, the handle is driven by two housings to clamp the valve, resulting in low force stability. In view of these problems, this invention is proposed to provide a pressure gripper and pressure gripping system that overcomes or at least partially solves these problems.

[0071] This utility model provides a gripper, see reference. Figures 2-7As shown, the gripper 1 may include: a clamping assembly 11, a first housing 12 and a second housing 13, a turntable 14, and a handle 15 connected to the turntable 14; the turntable 14 is provided with a plurality of first stroke tracks 141 and a plurality of second stroke tracks 142; the plurality of first stroke tracks 141 are arranged in a regular fan shape and close to the edge of the turntable 14, and the plurality of second stroke tracks 142 are arranged in an inclined radial shape and close to the center of the turntable 14; the clamping assembly 11 includes a plurality of clamping units 111, the number of clamping units 111 being the same as the number of second stroke tracks 142; the inner surface of the first housing 12 is provided with a first positioning pin 121 that matches the first stroke track 141, and a first track unit 122 that matches the clamping unit 111 respectively; the inner surface of the second housing 13 is provided with a second positioning pin 121 that matches the first stroke track 141 and the first positioning pin 121 respectively. Position pin 131, and second track unit 132 respectively matched with clamping unit 111; first housing 12 and second housing 13 cover to form receiving cavity 16, turntable 14 and clamping assembly 11 are located in receiving cavity 16, first housing 12 and second housing 13 are connected by first positioning pin 121 and second positioning pin 131; first housing 12 has a first limiting opening 123 on the side, second housing 13 has a second limiting opening 133 on the side, first limiting opening 123 and second limiting opening 133 form driving limiting opening 21, driving limiting opening 21 is located on one side of the vertical center line of gripper 1; handle 15 extends out of driving limiting opening 21, and can drive turntable 14 to swing in driving limiting opening 21; handle 15 drives turntable 14 to rotate, so as to drive several clamping units 111 to radially (the radial direction of the circle formed by several clamping units 111) converge or separate.

[0072] In the embodiment of this utility model, the above-mentioned pressure gripper has a drive limiting opening 21 formed by the first limiting opening 123 on the first housing 12 and the second limiting opening 133 on the second housing 13 located on one side of the vertical center line of the pressure gripper 1. Thus, when the user (generally a medical staff member) uses the pressure gripper 1, the handle 15 can only swing downward from one side of the vertical center line of the entire pressure gripper to the horizontal direction, and the swing angle can be controlled within 90°. Compared to existing pressure grippers where the handle can swing within a 180° range, firstly, users do not need to switch or turn their hands near the vertical center line during use, which is more in line with the direction of human force application and effectively ensures a continuous and stable force output during pressure application; secondly, because the force application is more continuous and stable, it effectively prevents the phenomenon of component jumping due to changes in the applied force (changes in direction or magnitude), thereby avoiding phenomena such as valve frame clamping the leaflet or valve frame overlap caused by component jumping, reducing the impact of human factors on the pressure grip pass rate; thirdly, because the handle is directly connected to the turntable located in the middle of the pressure gripper, the clamping components are brought together or separated through the turntable. Compared to the existing technology where the clamping components are driven by the handle moving the housing from both sides, this method is more stable due to precision limitations, avoiding the generation of force error caused by uneven force application on both sides, and improving the yield rate of artificial bioprosthetic valve pressure grippers.

[0073] The various components in this utility model embodiment are described below: (Refer to...) Figure 3 and Figure 4 As shown, the clamping assembly 11, which is the force transmission device of the entire clamping device and the device that directly contacts the artificial bioprosthetic valve being clamped, is driven by the turntable 14, and then forms a smaller circle after the clamping assembly is closed to achieve the curling and clamping treatment of the artificial bioprosthetic valve.

[0074] Reference Figures 2-4 , Figures 6-8 , Figure 14 and Figure 15 As shown, in this embodiment, the first housing 12 and the second housing 13 are mirror-symmetrical. The first positioning pin 121 on the inner surface of the first housing 12 matches the second positioning pin 131 on the inner surface of the second housing 13. The first housing 12 and the second housing 13 are covered and fixed by the first positioning pin 121 and the second positioning pin 131 to form a receiving cavity 16. The first positioning pin 121 and the second positioning pin 131 not only serve a connecting function, but also achieve positioning and limiting functions. In specific implementation of this utility model embodiment, the first positioning pin 121 and the second positioning pin 131 can be set as a nested structure, that is, one positioning pin is nested outside the other positioning pin to achieve a nested connection. Of course, it can also refer to Figure 4As shown, the two positioning pins have the same outer diameter and are hollow. Positioning cylinders or positioning posts are fitted inside the first positioning pin 121 and the second positioning pin 131. For example, the end of the positioning cylinder fitted in the first positioning pin 121 is located inside the first positioning pin 121, and the end of the positioning cylinder fitted in the second positioning pin 131 protrudes from the outer wall of the second positioning pin 131 and is located inside the first positioning pin 121. Of course, the matching structure can also be reversed. Furthermore, in this embodiment of the present invention, the first positioning pin 121 and the second positioning pin 131 can be configured with any matching structure, as long as the connection, positioning, and limiting functions can be achieved. This embodiment of the present invention does not impose detailed limitations on the specific structure of the two pins.

[0075] Reference Figure 14 and Figure 15 As shown, the inner surfaces of the first housing 12 and the second housing 13 are respectively provided with a first track unit 122 and a second track unit 132 for limiting the clamping unit 111. The number of the first track units 122 and the second track units 132 is equal to the number of clamping units 111, and the first track units 122 and the second track units 132 are mirror-symmetrical structures. By setting such a one-to-one corresponding limiting structure on the housing, the inventors can ensure that each clamping unit 111 operates independently, and no cumulative error occurs between the clamping units 111.

[0076] Reference Figures 3-5 As shown, the turntable 14 is generally disc-shaped and located in the middle of the vertical direction of the entire pressure device 1. It has a certain thickness in the axial direction. The turntable 14 is provided with a first stroke track 141 and a second stroke track 142. In this embodiment, the first stroke track 141 and the second stroke track 142 are arc-shaped through slots opened on the turntable 14. Since the turntable 14 is located in the middle of the entire pressure device 1, and the pressure device 1 is used to curl and press artificial bio-valve 2 that is several millimeters in size, the precision requirements are very strict. The turntable 14 serves as the starting point for force transmission. In this way, the force transmission process is more stable than the force transmission through the two shells in the prior art, and avoids the phenomenon of uneven force on both sides due to insufficient equipment precision when force is transmitted through the two shells.

[0077] Reference Figure 5 and Figure 15As shown, the first travel track 141 can serve as part of a limiting function component. Since it cooperates with the first positioning pin 121 on the first housing 12 and the second positioning pin 131 on the second housing 13, the first positioning pin 121 and the second positioning pin 131 can only slide within the travel range of the first travel track 141. This limits the rotation angle range of the turntable 14 relative to the first housing 12 and the second housing 13. In this embodiment, three first travel tracks 141 are specifically arranged. Therefore, there are also three first positioning pins 121 on the first housing 12 and three second positioning pins 131 on the second housing 13. Through this design, the inventors can ensure that the first housing 12 and the second housing 13 can be stably connected, and also achieve the purpose of limiting the position through the first travel track 141, the first positioning pin 121 and the second positioning pin 131. At the same time, it avoids the disadvantages of limited gripping force and gripping size caused by the limiting effect of more sets of designs. It should be further noted that the first travel track 141 in this embodiment is in the shape of a regular fan and is arranged close to the edge of the turntable 14. The inventor designed it in this way to avoid the generation of resistance in the radial direction when the first travel track 141 slides relative to the first positioning pin 121 and the second positioning pin 131 respectively, which allows the user to grip the gripper 1 normally with less effort.

[0078] Reference Figure 5 and Figure 15 As shown, the second stroke track 142 on the turntable 14, serving as the starting point for force transmission, is arranged in an inclined radial pattern close to the center of the turntable 14. This structural design provides the limiting shaft 114 with the power for radial movement. Then, under the cooperating limiting action of the guide blocks (first guide block 115 and second guide block 117), guide bars (first guide bar 116 and second guide bar 118), and track units (first track unit 122 and second track unit 132), the clamping unit 111 achieves radial movement, thereby enabling several clamping units 111 to synchronously converge or separate radially. Since each second stroke track 142 can only drive one cooperating clamping unit 111 for force transmission, the force transmission error between each clamping unit 111 is independent; compared to the prior art using a spiral track (combined with...) Figure 1DAs shown, the force transmission is achieved through four sets of clamping units. This results in a gradual increase in cumulative error. Furthermore, if a spiral track deviates in design or manufacturing dimensions, it will cause instability in the force transmission of the four matching clamping units, leading to non-rounded pieces or skipping during clamping. Moreover, due to the large changes in the spiral track angle, the user needs to exert more force to drive the clamps along the spiral track, making it more strenuous. In this embodiment, multiple sets of separately matched second-stroke tracks 142 and an equal number of clamping units 111 are used. Since each second-stroke track 142 is matched with a limiting shaft 114 of a clamping unit 111, adjacent clamping units 111 do not affect each other during force transmission, and no cumulative error occurs.

[0079] Reference Figure 5 and Figure 16 As shown, in the specific implementation of this utility model embodiment, the number of the second stroke track 142 and the clamping unit 111 are both set to 12, combined with Figures 11-13 As shown, the turntable 14 can move 12 clamping units 111, thereby changing the diameter of the gripping hole (the hole formed by the clamping unit 111 near the center). When the diameter of the gripping hole is gradually reduced, the artificial bioprosthetic valve placed in the gripping hole can be gripped and curled. The free ends of the 12 clamping units 111 near the center can form a circle with a diameter of no more than 1 mm. When the diameter of the gripping hole is gradually increased, the gripped artificial bioprosthetic valve can be removed, or an artificial bioprosthetic valve to be gripped can be placed.

[0080] Reference Figure 16 As shown, the working process of the gripper 1 in this embodiment of the present invention is as follows: the handle 15 drives the turntable 14 to rotate, and the second stroke track 142 on the turntable 14 synchronously transmits force to each clamping unit 111 of the clamping assembly 11. Under the limiting action of the first track unit 122 on the first housing 12 and the second track unit 132 on the second housing 13, each clamping unit 111 gathers or separates radially to achieve the gripping treatment of the artificial bio-valve.

[0081] In one embodiment, refer to Figure 6 As shown, the gripper 1 may further include: a base 17 and a first stop 18; the base 17 is provided with a mounting groove 171 that matches the first housing 12 and the second housing 13, and the first housing 12 and the second housing 13 are detachably installed in the mounting groove 171 after being closed; the first stop 18 is located at one end of the drive limiting opening 21 away from the vertical center line of the gripper 1.

[0082] The base 17 in this embodiment is designed to stably install the overall structure of the pressure gripper 1, ensuring even force distribution during user use. The base 17 provides effective support. The first stop 18 prevents excessive force or over-gripping from causing deformation or damage to the artificial bioprosthetic valve, or puncture of the balloon. In this embodiment, the first stop 18 can be mounted on the base 17 or connected to the handle 15, as long as it is located at the end of the drive limiting opening 21 away from the vertical center line of the pressure gripper 1 to achieve a blocking and limiting function.

[0083] In another embodiment, refer to Figure 7 As shown, the base 17 of the gripper 1 has a limiting slot 172, and the first stop 18 is detachably inserted into the limiting slot 172. In this embodiment, the first stop 18 is disposed on the base 17 and can be detachably installed through the limiting slot 172 on the base 17. In this embodiment, the bottom of the first stop 18 can be in the shape of a cross or a T, and the corresponding limiting slot 172 is also in a matching shape. The first stop 18 is installed on the base 17, which can prevent the handle 15 from swinging too much when gripping downwards.

[0084] In another embodiment, refer to Figure 3 , Figures 5-7 As shown, the turntable 14 has a central hole 143; the first housing 12 has a first through hole 124 matching the central hole 143, and the second housing 13 has a second through hole 134 matching the central hole 143; the first through hole 124, the central hole 143, and the second through hole 134 are located on the same center line and form a material processing channel; the base 17 has a first slot 173 and a second slot 174 on both sides of the mounting groove 171, and the positions of the first slot 173 and the second slot 174 match the positions of the material processing channel; the gripper 1 may also include: two sets of support components. 19; Each set of support components 19 may include: guide posts 191, guide grooves 192, and pressure plates 193; two guide posts 191 are detachably inserted into the first slot 173 and the second slot 174, respectively; two guide grooves 192 are respectively connected to the two guide posts 191, and the positions of the two guide grooves 192 match the positions of the material processing channels; two pressure plates 193 are respectively engaged with the two guide grooves 192, and the pressure plates 193 can slide on the guide grooves 192; the shape formed by the pressure plates 193 engaging with the guide grooves 192 is consistent with the shape of the artificial bio-valve 2 that is connected and compressed and curled (see reference). Figure 1A The shape of the catheter delivery assembly (as shown) matches that of the catheter.

[0085] In this embodiment, a material processing channel is formed in the middle of each component. After the artificial bioprosthetic valve is processed in the material processing channel, it needs to be taken out of the channel and the next artificial bioprosthetic valve to be pressed is placed in it.

[0086] In this embodiment, during use, the catheter delivery assembly connected to the artificial bioprosthetic valve is placed on the guide groove 192 of the support component 19, and then the pressure plate 193 is engaged. By pushing the pressure plate 193, the catheter delivery assembly is moved radially and stably towards the material processing channel. This support component 19 helps to accurately position the artificial bioprosthetic valve before pressing. In this embodiment, two sets of support components 19 can be provided, located at both ends of the material processing channel, which facilitates users with different hands to perform pressing and curling operations from different directions.

[0087] In another embodiment, refer to Figure 7 As shown, a limiting ear 194 is provided on the pressure plate 193. The size of the limiting ear 194 is larger than the diameter of the first through hole 124 and the second through hole 134. In this embodiment, the limiting ear 194 can play a limiting role, thus controlling the sliding stroke of the pressure plate 193 on the guide groove 192, which can accurately position the artificial bio-valve.

[0088] The following are the pressure and gripping steps before performing TAVR surgery:

[0089] (1) Remove the gripper and correctly install the first stop and support assembly.

[0090] (2) Remove the label on the artificial bioprosthetic valve. Under sterile conditions, place the artificial bioprosthetic valve onto the balloon of the catheter delivery assembly in the correct direction of the procedure. Lift the handle of the pressure gripper upwards, place the artificial bioprosthetic valve on the balloon of the catheter delivery assembly onto the guide groove, and then use the pressure plate to engage it. Push the pressure plate towards the material processing channel. The pressure plate will drive the artificial bioprosthetic valve to move radially and stably toward the material processing channel.

[0091] (3) Before pressing down, make sure that the opening direction of the artificial bioprosthetic valve leaflet is correct, and observe the accurate positioning of the artificial bioprosthetic valve before slowly pressing down the handle. After completing the pressing down operation, hold for 5 seconds and repeat pressing down the handle twice.

[0092] (4) Remove the protective sleeve of the balloon, rinse the loading sheath with heparin water, and then completely put the loaded balloon into the loader. The loader covers the balloon and the tip, and then pull out the protective wire.

[0093] (5) After pressing, push the artificial bio-valve into the guide groove on the guide post for later use.

[0094] It is important to note that the entire artificial bioprosthetic valve should not be left in place for more than 15 minutes after loading, in order to avoid damage to the valve leaflets and affecting the expected function after implantation.

[0095] Compared with existing devices that require two users (medical staff) to perform sample delivery and sampling respectively, the gripper provided in this embodiment only requires one user to complete the sample delivery, gripping and sampling operations.

[0096] In another embodiment, refer to Figures 8-10 As shown, the gripper 1 may further include: a second stop 20; the second stop 20 is located in the receiving cavity 16, connected to the first housing 12 and the second housing 13 respectively, and matched with the position of the drive limiting opening 21; the edge of the first housing 12 extends to form a first support seat 125, and the edge of the second housing 13 extends to form a second support seat 135; when the first housing 12 and the second housing 13 are closed, the first support seat 125 and the second support seat 135 form a support base 22 to support the gripper 1.

[0097] The difference between this embodiment and the above embodiments is that the second stop in this embodiment has a different structure than the first stop in the above embodiments. The second stop in this embodiment matches the position of the drive limiting opening and is located in the receiving cavity formed by the first housing and the second housing, and is installed on the first housing and the second housing. The second stop is arc-shaped as a whole. The arc opening angle of the second stop can control the handle to rotate within 90°, which is used to further limit the position of the handle so that the handle can only rotate to the horizontal position.

[0098] In another embodiment, refer to Figures 11-15 As shown, the clamping unit 111 of the gripper 1 may include: a first clamping body 112, a second clamping 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; the ends of the first clamping body 112 and the second clamping body 113 away from the second stroke track 142 are integrally connected, and the ends close to the second stroke track 142 are slidably connected to the second stroke track 142 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 clamping body 112, and the second guide block 117 and the second guide strip 118 are located on the outer side of the second clamping body 113; the turntable 14 rotates to act on the limiting shaft 114, thereby driving the first guide block 115 and the first guide strip 116 to slide on the first track unit 122, and the second guide block 117 and the second guide strip 118 to slide on the second track unit 132, so as to drive a plurality of clamping units 111 to radially converge or separate.

[0099] In this embodiment, it is composed of 12 clamping units 111. Due to the structural design of the clamping units 111, combined with... Figure 14 and Figure 15 As shown, it moves radially under the limiting action of the first track unit 122 on the first housing 12 and the second track unit 132 on the second housing 13. In this embodiment, the first clamping body 112 and the second clamping body 113 in the clamping unit 111 have a mirror-symmetrical structure. According to the positional relationship between the first clamping body 112 and the second clamping body 113, they are divided into a front side, an outer side, and an inner side, combined with the body. Figure 13 As shown, taking the second clamp 113 as an example, the second clamp 113 may sequentially include a first outer ridge 1131, a second outer ridge 1132, a third outer ridge 1133, a fourth outer ridge 1134, a first front side 1135, a second front side 1136, and a third front side 1137. The length of the second outer ridge 1132 in the second clamp 113 is greater than the length of the second front side 1136, and the second outer ridge 1132, the second front side 1136, and the second guide strip 118 located on the second clamp 113 are parallel; the first outer ridge 1131 and the second outer ridge 1132 are clamped together. The angle between the first and second outer ridges is 150°, and the two ridges are rounded. The angle between the second outer ridge 1132 and the third outer ridge 1133 is 150°, and the two ridges are rounded. The angle between the third outer ridge 1133 and the fourth outer ridge 1134 is 105°, and the two ridges are rounded. The angle between the fourth outer ridge 1134 and the first front side 1135 is 30°. The angle between the first front side 1135 and the second front side 1136 is 105°, and the two ridges are rounded. The angle between the second front side 1136 and the third front side 1137 is 150°, and the two ridges are rounded. In this embodiment, a driving gap is formed between the first clamp body 112 and the second clamp body 113, combined with... Figure 16 As shown, in the dispersed state of the clamping assembly 11, the fourth outer ridge and the first front side of the two adjacent clamping units 111 are separated. In the converged state of the clamping assembly 11, the fourth outer ridge and the first front side of the two adjacent clamping units 111 are in a close-fitting state, so that the diameter of the enclosed circle is no more than 1 mm, which helps doctors to perform small-diameter (diameter less than 5 mm) compression treatment of the artificial bio-valve during clinical application.

[0100] In another embodiment, refer to Figure 2 , Figure 14 and Figure 15As shown, the number of first track units 122 and the number of second track units 132 are equal to the number of clamping units 111, respectively; the plurality of first track units 122 are evenly distributed in a circular shape on the inner surface of the first housing 12, and each first track unit 122 may include: a first slide groove 126 and a first partition plate 127; the first slide groove 126 is located radially in the circle in which the plurality of first track units 122 are located, and a second slide groove 128 is formed between the first slide groove 126 and the first partition plate 127, and the center line of the first slide groove 126 is parallel to the center line of the second slide groove 128; a first guide block 115 is located in the first slide groove 126 and can slide in the first slide groove 126; a first guide strip 116 is located in the first... The second slide is located in the second slide groove 128 and can slide in the second slide groove 128; a plurality of second track units 132 are evenly distributed in a circular shape on the inner surface of the second housing 13, and each second track unit 132 may include: a third slide groove 136 and a second partition plate 137; the third slide groove 136 is located in the radial direction of the circle in which the plurality of second track units 132 are located, and a fourth slide groove 138 is formed between the third slide groove 136 and the second partition plate 137, and the center line of the third slide groove 136 is parallel to the center line of the fourth slide groove 138; a second guide block 117 is located in the third slide groove 136 and can slide in the third slide groove 136; a second guide strip 118 is located in the fourth slide groove 138 and can slide in the fourth slide groove 138.

[0101] In this embodiment, a first track unit 122 and a second track unit 132 are mirror-symmetrical and together limit the movement of a clamping unit 111. Taking the first track unit 122 as an example, since the first groove 126 is located radially within the circle containing the multiple first track units 122, and the centerline of the first groove 126 is parallel to the centerline of the second groove 128, this structure restricts the movement trajectory of the clamping unit 111. Under the constraints of each set of first track units 122 and second track units 132, referring to... Figure 16 As shown, the multiple clamping units 111 can only move radially within their respective circles, so that the diameter of the circle formed by the multiple clamping units 111 after they converge is controlled to be as small as possible.

[0102] In another embodiment, refer to Figure 14 and Figure 15 As shown, the first slide groove 126 and the third slide groove 136 are both strip-shaped closed slide grooves. The closed slide grooves help to limit the radial sliding stroke of the first guide block 115 and the second guide block 117 that are adapted to them, so as to limit the stroke range of the clamping unit 111.

[0103] In another embodiment, refer to Figure 14As shown, the radius of the circle containing the plurality of first positioning pins 121 is larger than the radius of the circle containing the plurality of first sliding grooves 126; the radius of the circle containing the plurality of second positioning pins 131 is larger than the radius of the circle containing the plurality of third sliding grooves 136. In this embodiment, the first positioning pins 121 are located outside the first sliding grooves 126, and the second positioning pins 131 are located outside the third sliding grooves 136. In this way, the clamping unit 111 will not be affected by the sliding stroke of the first positioning pins 121 or the second positioning pins 131 during the clamping or separating process, and there will be no intersection of running trajectories between the components, avoiding obstruction or wear between the components.

[0104] In another embodiment, for ease of installation of the limiting shaft, refer to Figure 4 and Figure 13 As shown, the limiting shaft 114 passes through the first clamp body 112 and the second clamp body 113 respectively, and is connected to the first guide block 115 and the second guide block 117 respectively. In this embodiment, when assembling the gripper, the limiting shaft 114 needs to be disassembled from one end of the first clamp body 112 or the second clamp body 113, and then passed through the second stroke track 142 on the turntable 14 before being installed. Therefore, the limiting shaft 114 can pass through the first clamp body 112 and the second clamp body 113 respectively, and then both ends can be connected to the first guide block 115 and the second guide block 117 respectively. The specific connection method can be threaded connection, riveting, or snap-fit ​​connection, etc., which is not specifically limited in this embodiment.

[0105] In another embodiment, refer to Figure 5 As shown, the arc (α) of the first travel track 141 in the turntable 14 is 85°–92°; the arc (β) of the second travel track 142 is 75°–82°. Preferably, the arc (α) of the first travel track 141 is 87°–89°; the arc (β) of the second travel track 142 is 78°–79°. In this embodiment, combined with… Figure 16 As shown, since the first positioning pin 121 and the second positioning pin 131 sliding in the first travel track 141 have a certain thickness, their actual sliding range is definitely smaller than the arc range of the arc segment where the first travel track 141 is located. By limiting the arc of the arc segment where the first travel track 141 is located, the inventors ensured that the relative rotation angle of the turntable 14 in the middle with respect to the first housing 12 and the second housing 13 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 142 is located also prevents large-angle changes in the direction of force when the second travel track 142 applies force to the limiting shaft 114, making the user's operation more effortless.

[0106] Using the pressure gripper in this embodiment of the present invention, the artificial bio-valve in Embodiment 3 of application number 201920458990.1 was pressure-grinded and rolled. No problems such as clamping of the leaflets or overlapping of the valve frame were found in the artificial bio-valve. Through caliper measurement and comparison with cylindrical mold, the artificial bio-valve during and after the pressure-grinding process was relatively round, with a high overall yield and no skipping of parts.

[0107] Based on the same inventive concept, this utility model embodiment also provides a pressure gripping system, which may include: a catheter delivery assembly and the aforementioned pressure gripper; and a pressure-gripped and curled artificial bioprosthetic valve 2 (combined with...). Figure 1A (As shown) is used to connect to one end of the catheter delivery assembly; the crimped and curled artificial bioprosthetic valve is crimped and curled by the crimper.

[0108] The specific implementation and detailed effects of the above-mentioned gripping system in this utility model embodiment can be referred to the relevant description of the gripper, and will not be repeated here.

[0109] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. This disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims. Thus, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model is also intended to include these modifications and variations.

Claims

1. A crimping device, comprising: The pincer assembly, the first shell and the second shell are characterized in that the pressure holder further comprises a rotating disc and a handle connected to the rotating disc; 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 sectors and close to the edge of the rotating disc, and the plurality of second stroke tracks are arranged in the form of inclined radii and close to the center of the rotating disc; the pincer assembly comprises a plurality of pincer units, and the number of the pincer units is the same as that of the second stroke tracks; The inner surface of the first shell is provided with first positioning pins matched with the first stroke tracks and first track units matched with the pincer units respectively; and the inner surface of the second shell is provided with second positioning pins matched with the first stroke tracks and the first positioning pins respectively and second track units matched with the pincer units respectively; The first shell and the second shell are combined to form a containing cavity, the rotating disc and the pincer assembly are located in the containing cavity, and the first shell and the second shell are connected through the first positioning pins and the second positioning pins; a first limiting opening is formed in the side surface of the first shell, a second limiting opening is formed in the side surface of the second shell, the first limiting opening and the second limiting opening form a driving limiting opening, the driving limiting opening is located on one side of the 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, and the handle drives the rotating disc to rotate to drive the plurality of pincer units to gather or separate radially.

2. The press from claim 1, wherein, Further comprising: a base and a first stopper; the base is provided with a mounting groove matched with the first shell and the second shell, and the first shell and the second shell can be detachably mounted in the mounting groove after being combined; the first stopper is located at the end of the driving limiting opening away from the vertical center line of the pressure holder.

3. The press from claim 2, wherein, A limiting slot is formed in the base, and the first stopper can be detachably inserted into the limiting slot.

4. The press from claim 2, wherein, 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 first through hole, the middle hole and the second through hole are located on the same center line and form a material processing channel; the base is provided with a first slot and a second slot on both sides of the mounting groove, and the positions of the first slot and the second slot are matched with the position of the material processing channel; The pressing device further comprises two sets of supporting assemblies; each set of the supporting assemblies comprises a guide column, a guide slot and a pressing plate; two guide columns are respectively detachably inserted into the first and second insertion slots; two guide slots are respectively connected with the two guide columns, and the positions of the two guide slots match the position of the material processing channel; two pressing plates are respectively clamped with the two guide slots, and the pressing plates can slide on the guide slots; the shape of the pressing plates clamped with the guide slots matches the shape of the catheter delivery assembly connected with the crimped artificial biological valve.

5. The press from claim 4, wherein, 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 and second through holes.

6. The press from claim 1, wherein, Further comprising: a second stopper; The second stopper is located in the accommodating cavity, connected with the first and second housings respectively, and matches the position of the driving limiting opening; The edge of the first housing extends to form a first supporting seat, and the edge of the second housing extends to form a second supporting seat; In the state that the first and second housings are closed, the first and second supporting seats form a supporting base to support the pressing device.

7. The press according to any one of claims 1 to 6, characterized in that 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; the first and second clamp bodies are integrally connected away from one end of the second stroke track and are slidably connected with the second stroke track through the limiting shaft near one end of the second stroke track; the first guide block and the first guide strip are located on the outer side surface of the first clamp body, and the second guide block and the second guide strip are located on the outer side surface of the second clamp body; 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 clamp units to gather or separate radially.

8. The press from claim 7, 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 first track units are uniformly distributed in a circular shape on the inner surface of the first housing, and each first track unit 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, and the first sliding groove and the first partition plate form a second sliding groove therebetween, 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 comprising: 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; the second guide strip is located in the fourth sliding groove and can slide in the fourth sliding groove.

9. The press from claim 8, wherein, The first sliding groove and the third sliding groove are respectively strip-shaped closed sliding grooves; 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.

10. The press from claim 7, wherein, The limiting shafts respectively pass through the first jaw body and the second jaw body and are respectively connected with the first guide block and the second guide block.

11. The press from claim 7, 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°.

12. The press from claim 11, 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°.

13. A compression system characterized by, Comprise: A catheter delivery assembly and a crimping device as claimed in any one of claims 1-12; a crimped artificial biological valve is connected to one end of the catheter delivery assembly; and the crimped artificial biological valve is crimped by the crimping device. A catheter delivery assembly and a crimping device as claimed in any one of claims 1-12; a crimped artificial biological valve is connected to one end of the catheter delivery assembly; and the crimped artificial biological valve is crimped by the crimping device.

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