A gripping device

Abstract

The present invention relates to the technical field of medical devices, and provides a crimping device, comprising an outer cylinder, an inner cylinder, a crimping assembly, and a first handle and a second handle. The outer periphery of the outer cylinder is provided with an opening, and a plug-in interface is provided. A plurality of crimping assemblies are arranged inside the outer cylinder and are pivotally connected to the outer cylinder, and the sides of the plurality of crimping assemblies away from the outer cylinder jointly form a plug-in channel connected to the plug-in interface. The inner cylinder is arranged inside the outer cylinder, and a driving structure corresponding to the crimping assembly is provided thereon, and the driving structure is connected to the crimping assembly. One end of the first handle is connected to the inner cylinder, and the other end extends outward through the opening, and the second handle is connected to the outer cylinder. The first handle and the second handle are moved closer to or farther away from each other, so that the inner cylinder rotates relative to the outer cylinder, and the driving structure can drive the crimping assembly to rotate relative to the outer cylinder, so that the diameter of the plug-in channel becomes smaller or larger. The operation can be performed with one hand, and the operation is flexible, and the crimping is uniform, which is conducive to ensuring the quality of the bracket.

Description

Technical Field

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

[0002] Stent implantation is used to treat diseases such as atherosclerosis and aneurysms. Stent technology has developed rapidly since it was first proposed more than 30 years ago. So far, there are many types of commercial stents on the market, which are designed for different diseases. The diameter of the stent is generally slightly larger than the artery to be transplanted, so the stent needs to be compressed before implantation in the artery, and then the compressed stent is placed in the artery.

[0003] In the prior art, commonly used stent crimping devices are usually stent crimping machines, which are fixedly connected to an operating platform. The devices are expensive and bulky, and are not flexible enough to use.

[0004] In order to solve the above problems, it is urgent to provide a crimping device to solve the problems of being expensive, bulky, and not flexible in use. Summary of the invention

[0005] The purpose of the present invention is to provide a crimping device to achieve the effects of reducing costs, simplifying structure and being flexible in use.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A handheld crimping device, comprising:

[0008] An outer cylinder, wherein an opening is provided on the outer cylinder wall of the outer cylinder, and an insertion port is provided at the end of the outer cylinder along the axial direction thereof;

[0009] A plurality of crimping assemblies are arranged inside the outer cylinder and are pivotally connected to the outer cylinder. The plurality of crimping assemblies are arranged along the circumference of the outer cylinder. One side of the plurality of crimping assemblies away from the outer cylinder together forms a plug-in channel connected to the plug interface.

[0010] An inner cylinder is arranged inside the outer cylinder, and a driving structure connected to the crimping assembly is arranged on the inner cylinder;

[0011] a first handle and a second handle, wherein one end of the first handle is connected to the inner tube, the other end of the first handle extends outward through the opening, and the second handle is connected to the outer tube;

[0012] The first handle and the second handle can move closer to or farther from each other to allow the inner cylinder to rotate relative to the outer cylinder, and the driving structure can drive the crimping assembly to rotate relative to the outer cylinder to reduce or increase the diameter of the insertion channel.

[0013] As a preferred solution, the crimping assembly includes:

[0014] Press grip piece;

[0015] a first pivot shaft connected to the pressure grip piece and extending along the length direction of the pressure grip piece, the first pivot shaft being pivotally connected to the outer cylinder; and

[0016] A second pivot shaft is connected to the pressure grip piece and extends along the length direction of the pressure grip piece. The driving structure is an arc-shaped groove opened on the inner cylinder. The pressure grip piece includes a butt end. The center of the first pivot shaft is the center point of the line connecting the center of the arc-shaped groove and the butt end. The second pivot shaft is passed through the arc-shaped groove. When the inner cylinder rotates relative to the outer cylinder, the second pivot shaft slides in the arc-shaped groove to make the pressure grip piece rotate relative to the outer cylinder.

[0017] Furthermore, the crimping assembly further comprises:

[0018] A connecting block is fixedly connected to the pressure gripping piece, and a first through hole and a second through hole are provided on the connecting block. The first through hole is connected to the first pivot axis, and the second through hole is connected to the second pivot axis.

[0019] Specifically, the pressure gripping piece includes an abutting portion, the abutting portion includes a supporting plane and an abutting inclined surface arranged at an acute angle, and an end of the abutting portion abuts against the supporting plane of an adjacent abutting portion.

[0020] As a preferred solution, the inner cylinder includes:

[0021] An inner cylinder body, disposed in the outer cylinder; and

[0022] Two movable plates are respectively arranged at two ends of the inner cylinder body along the axial direction. The movable plates are provided with arc grooves corresponding to the second pivot shaft, and two ends of the second pivot shaft are respectively inserted into the corresponding arc grooves.

[0023] As a preferred solution, the dimension of the outer cylinder along the axial direction is 100 mm to 150 mm.

[0024] As a preferred solution, the inner circumference of the outer cylinder is clearance-matched with the outer circumference of the inner cylinder.

[0025] As a preferred solution, the outer peripheral wall of the inner cylinder is provided with scale lines, and the scale lines are arranged at the opening, and the scale lines can indicate the crimping size of the crimping device.

[0026] As a preferred solution, a restoring member is provided between the first handle and the second handle, and the restoring member is configured to restore the first handle to an initial position.

[0027] As a preferred solution, a first mounting groove is formed on the first handle, a second mounting groove is formed on the second handle, and two ends of the reset member are respectively inserted into the first mounting groove and the second mounting groove.

[0028] As a preferred solution, a rod-shaped limiting component is further provided on the first handle or the second handle, the limiting component is rod-shaped, the reset member is a spring, the limiting component is connected to the first handle or the second handle, and the limiting component is inserted into the spring.

[0029] As a preferred solution, the limiting assembly is a screw rod, and the screw rod is threadedly connected to the first handle or the second handle groove.

[0030] As a preferred solution, the limit assembly includes:

[0031] a limiting member, one end of which is connected to the first handle or the second handle; and

[0032] The flexible member is arranged at the other end of the limiting member.

[0033] As a preferred solution, the first handle is detachably connected to the inner tube, and the second handle is detachably connected to the outer tube.

[0034] As a preferred solution, the first handle and the second handle are made of plastic.

[0035] The beneficial effects of the present invention are:

[0036] The present invention provides a crimping device, including an outer cylinder, an inner cylinder, a crimping assembly, and a first handle and a second handle. When the crimping device is working, the first handle and the second handle move closer to or farther from each other, so that the inner cylinder rotates relative to the outer cylinder. The driving structure can drive the crimping assembly to rotate relative to the outer cylinder, so that the diameter of the insertion channel becomes smaller or larger. The present invention can realize the action of crimping a bracket through a crimping device with a simple structure, thereby achieving the effect of reducing costs and simplifying the structure. In addition, the crimping device of the present invention is in a non-fixed form and can be held in one hand for use. It is not limited by the use scene, avoids the use of a bulky crimping machine, and improves the flexibility of the crimping device. In addition, multiple crimping assemblies can achieve uniform force application on the bracket, which is beneficial to ensuring the quality of the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0038] Figure 1 is a schematic structural diagram of a crimping device provided by an embodiment of the present invention;

[0039] Figure 2 is a schematic structural diagram of a crimping assembly and an inner cylinder provided in an embodiment of the present invention;

[0040] Figure 3 is a cross-sectional view of a crimping device provided by an embodiment of the present invention;

[0041] Figure 4 It is a schematic diagram of the structure of the crimping assembly provided in an embodiment of the present invention.

[0042] The following are marked in the figure:

[0043] 100- crimping device;

[0044] 1-outer cylinder; 11-side wall; 111-plug interface; 13-outer cylinder wall; 14-opening;

[0045] 2-grip assembly; 21-grip sheet; 211-extension portion; 212-abutment portion; 2121-abutment slope; 2122-support plane; 22-connection block; 221-first through hole; 222-second through hole; 23-second pivot axis; 24-first pivot axis; 25-insertion channel;

[0046] 3-inner cylinder; 31-moving disk; 311-arc groove; 33-inner cylinder body;

[0047] 4-handle assembly; 41-first handle; 411-first mounting slot; 42-second handle; 421-second mounting slot; 43-reset member; 44-limiting assembly

[0048] 6- scale line. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It is also necessary to explain that, for ease of description, only the structural parts related to the present invention are shown in the accompanying drawings, rather than the entire structural structure.

[0050] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the connection of the internal structures of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0052] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0053] At present, stent implantation is widely used to treat diseases such as atherosclerosis and aneurysms. Usually, the diameter of the machined stent is slightly larger than the artery to be transplanted. After completing the stent processing process, the staff needs to press and grip the stent to make the diameter smaller than the inner diameter of the artery to be transplanted. Then, liquid nitrogen is poured into the pressed and gripped stent to keep its diameter unchanged, and then the pressed and gripped stent is placed in the artery.

[0054] like Figure 1-2As shown, this embodiment provides a crimping device 100, which includes an outer cylinder 1, a plurality of crimping assemblies 2, an inner cylinder 3, a first handle 41 and a second handle 42. An opening 14 is provided on the outer periphery of the outer cylinder 1, and an insertion port 111 is provided at the end of the outer cylinder 1 along its axial direction. A plurality of crimping assemblies 2 are arranged inside the outer cylinder 1 and are pivotally connected to the outer cylinder 1. A plurality of crimping assemblies 2 are arranged along the circumference of the outer cylinder 1, and a side of the plurality of crimping assemblies 2 away from the outer cylinder 1 jointly forms a plug-in channel 25 connected to the insertion port 111. The inner cylinder 3 is arranged inside the outer cylinder 1, and a driving structure connected to the crimping assembly 2 is provided on the inner cylinder 3. One end of the first handle 41 is connected to the inner cylinder 3, and the other end of the first handle 41 extends outward through the opening 14, and the second handle 42 is connected to the outer cylinder 1.

[0055] When the crimping device 100 is working, the operator manually drives the first handle 41 and the second handle 42 to move closer to or away from each other so that the inner cylinder 3 rotates relative to the outer cylinder 1. The driving structure can drive the crimping assembly 2 to rotate relative to the outer cylinder 1 so that the diameter of the plug-in channel 25 becomes smaller or larger. The crimping device 100 in this embodiment has a simple structure and low cost. The operator holds the first handle 41 and the second handle 42 in one hand, and through a simple force application action, the crimping device 100 can achieve the crimping action of the bracket. The crimping device 100 of this embodiment is a non-fixed form, and the operator can hold it with one hand for use, which is not limited by the use scene, avoiding the use of a bulky crimping machine. In addition, multiple crimping assemblies 2 can evenly apply force to the bracket, so that the crimping force of the crimping device 100 on the bracket is uniform, which is conducive to ensuring the quality of the bracket.

[0056] The structure of the crimping assembly 2 is now introduced. Figure 3-4 As shown, the crimping assembly 2 includes a crimping piece 21, a first pivot shaft 24, and a second pivot shaft 23. The first pivot shaft 24 and the second pivot shaft 23 are simultaneously connected to the crimping piece 21 and extend along the length direction of the crimping piece 21. The first pivot shaft 24 is pivoted to the outer cylinder 1. The driving structure is an arc groove 311 provided on the inner cylinder 3. The second pivot shaft 23 is passed through the arc groove 311. When the inner cylinder 3 rotates relative to the outer cylinder 1, the second pivot shaft 23 slides in the arc groove 311 to rotate the crimping piece 21 relative to the outer cylinder 1. When the first handle 41 and the second handle 42 approach or move away from each other, the second pivot shaft 23 slides along the arc groove 311, thereby realizing the rotation of the crimping piece 21 relative to the outer cylinder 1, and further realizing the enlargement or reduction of the diameter of the insertion channel 25. Exemplarily, along Figure 3 In the clockwise direction, the straight-line distance between the center line of the arc groove 311 and the center line of the inner cylinder 3 gradually increases. When the inner cylinder 3 rotates counterclockwise relative to the outer cylinder 2, the second pivot shaft 23 slides along the arc groove 311, the gripping piece 21 rotates counterclockwise, and the diameter of the insertion channel 25 becomes smaller.

[0057] The arc length of the motion trajectory of the second pivot axis 23 is L1, the center angle of the motion trajectory of the second pivot axis 23 is α1, and the arc radius corresponding to the motion trajectory of the second pivot axis 23 is R1, then L1=R1×α1.

[0058] Among them, the arc length of the movement trajectory of the abutting portion 212 of the pressing and gripping piece 21 is L2, the central angle of the movement trajectory of the abutting portion 212 of the pressing and gripping piece 21 is α2, and the radius corresponding to the movement trajectory of the abutting portion 212 of the pressing and gripping piece 21 is R2, then L2=R2×α2.

[0059] Since the movement of the center and the abutting end of the second pivot shaft 23 is equivalent to the movement of a lever with the first pivot shaft 24 as the fulcrum, it can be seen that the movement angles of the center point and the abutting end of the second pivot shaft 23 are equal, that is, α1=α2.

[0060] If the movement speed of the second pivot shaft 23 is V1, and the movement speed of the contact portion 212 of the gripping piece 21 is V2, after time t, the arc length of the movement trajectory of the second pivot shaft 23 is L1, the center angle of the movement trajectory of the second pivot shaft 23 is α1, the arc length of the movement trajectory of the contact portion 212 of the gripping piece 21 is L2, and the center angle of the movement trajectory of the contact portion 212 of the gripping piece 21 is α2, then

[0061] From the above derivation process, we can get V2 = kV1, where,

[0062] In summary, the movement speed of the second pivot shaft 23 is linearly related to the movement speed of one end of the abutment portion 212. Based on the above analysis, when the first handle 41 and the second handle 42 are close to each other, the gripping force applied to the first handle 41 and the second handle 42 will be evenly applied to the inner cylinder 3 and the outer cylinder 1, so that the inner cylinder 3 rotates relative to the outer cylinder 1, and further drives the second pivot shaft 23 to move in the arc groove 311. Since the movement trajectory of the second pivot shaft 23 is linearly related to the movement trajectory of the abutment portion 212, it is ensured that the force applied to the first handle 41 and the second handle 42 acts evenly on the abutment portion 212, that is, the second pivot shaft 23 drives the abutment portion 212 to move at a uniform speed, which is conducive to the uniform reduction of the diameter of the insertion channel 25, so that the diameter of the bracket is uniformly reduced, and the problem of overlapping is avoided, which is conducive to ensuring product quality.

[0063] Further, such as Figure 3-4As shown, the crimping assembly 2 also includes a connecting block 22, and the extensions 211 at both ends of the crimping piece 21 are respectively fixed to a connecting block 22. The connecting block 22 is provided with a first through hole 221 and a second through hole 222, the first pivot shaft 24 is penetrated in the first through hole 221, and the second pivot shaft 23 is penetrated in the second through hole 222. By opening the first through hole 221 and the second through hole 222 on the connecting block 22, the connection between the crimping assembly 2 and the inner cylinder 3 and the outer cylinder 1 is realized, which has the effect of simple structure and convenient assembly. The connecting block 22 and the crimping piece 21 can be locked by screws, which has the effect of convenient disassembly and assembly. In other embodiments, the connecting block 22 and the crimping piece 21 can be connected in other ways.

[0064] As a preferred solution, Figure 3-4 As shown, the first through hole 221 of the connecting block 22 may also be a groove-shaped structure. After the connecting block 22 is fixed to the extension portion 211 by screws or other means, the groove-shaped structure matches the plane of the extension portion 211, thereby realizing the pivot connection with the first pivot shaft 24. By designing the first through hole 221 of the connecting block 22 as a groove-shaped structure, the thickness of the connecting block 22 can be reduced, thereby saving materials and reducing the weight of the handheld crimping assembly 2. At the same time, the groove-shaped structure is quickly connected to the extension portion 211, which has the effect of convenient operation.

[0065] The crimping piece 21 also includes an abutment portion 212. If the abutment portion 212 is a conventional right-angled structure, when the diameter of the insertion channel 25 decreases and reaches a certain value, the abutment portions 212 of two adjacent crimping pieces 21 interfere with each other, resulting in the inability to further reduce the diameter of the insertion channel 25, and the crimping device 100 cannot crimp the bracket to a smaller size, thereby reducing the adjustable range of the diameter of the insertion channel 25, and further reducing the crimping diameter range that the crimping device 100 can apply. Even when the minimum diameter range of the insertion channel 25 is reached, if the operator continues to apply force, the crimping piece 21 may be damaged.

[0066] As a preferred solution, Figure 4 As shown, the abutting portion 212 includes a supporting plane 2122 and an abutting inclined surface 2121 set at an acute angle, and the supporting plane 2122 abuts against the supporting plane 2122 of the adjacent abutting portion 212. Through the cooperation of the supporting plane 2122 and the abutting inclined surface 2121, when the crimping piece 21 rotates relative to the outer cylinder, the end of the abutting portion 212 can slide relative to the supporting plane 2122 of the adjacent abutting portion 212, and there will be no mutual interference between the adjacent 21, ensuring that the diameter of the insertion channel 25 varies within a wide range, so that the abutting portions 212 of multiple crimping pieces 21 can abut at the center of the inner cylinder 3, that is, the minimum size of the crimping can be 0mm, thereby improving the applicable range of the crimping device 100. Specifically, the crimping stroke range of the crimping device 100 of this embodiment is 0mm to 15mm.

[0067] As a preferred solution, Figure 4 As shown, the crimping piece 21 includes an abutting portion 212 and an extending portion 211, the extending portion 211 is located at both ends of the abutting portion 212, and the first pivot shaft 24 and the second pivot shaft 23 can be connected to the extending portion 211. Compared with a whole crimping piece 21, the crimping piece 21 of this embodiment is provided with a weight reduction groove (not shown in the figure), and the weight of the crimping piece 21 is reduced by the weight reduction groove, thereby reducing the weight of the crimping device 100, which is conducive to realizing the light application of the crimping device 100. Specifically, the mass of the handheld crimping assembly 100 in this embodiment is 0.5Kg to 1Kg.

[0068] Furthermore, the crimping pieces 21 of the crimping device 100 are designed in at least three groups. When the crimping pieces 21 are designed in three groups, the plug-in channel 25 is an equilateral triangle; when the crimping pieces 21 are designed in four groups, the plug-in channel 25 is a regular quadrilateral; when the crimping pieces 21 are designed in five groups, the plug-in channel 25 is a regular pentagon; when the crimping pieces 21 are designed in six groups, the plug-in channel 25 is a regular hexagon; and so on, the more groups of crimping pieces 21 are designed, the closer the shape of the plug-in channel 25 is to a circle. Since the bracket structure is a circular structure, the closer the shape of the plug-in channel 25 is to a circle, the more conducive it is to improving the crimping accuracy and avoiding overlap when the crimping device 100 crimps the bracket, and the more conducive it is to ensuring the quality of the bracket. In this embodiment, six groups of crimping pieces 21 are selected. In other embodiments, the operator can select other parameters according to the accuracy requirements.

[0069] The structure of the outer cylinder 1 is now introduced. The outer cylinder 1 includes an outer cylinder wall 13 and two side walls 11, wherein the outer cylinder wall 13 is sleeved outside the inner cylinder 3, and the two side walls 11 are respectively arranged at both ends of the outer cylinder wall 13 along the axial direction, and the two side walls 11 are respectively fixedly connected to the outer cylinder wall 13. The two ends of the crimping assembly 2 are respectively pivotally connected to the two side walls 11.

[0070] Since the length of the crimping device 100 in the prior art is 10 mm to 15 mm, the length of the crimping device 100 in the prior art that can crimp the stent at a time is limited, and the operator needs to crimp the entire stent multiple times, which results in low work efficiency. At the same time, since the operator applies uneven force each time, the diameter of the stent varies to a certain extent, and it is easy for the stent to be partially deformed and damaged, thereby affecting the performance of the stent.

[0071] In order to solve the above problems, Figure 1-2As shown, the dimension of the outer cylinder 1 along the axial direction is 100 mm to 150 mm. By increasing the length of the outer cylinder 1, the length of the outer cylinder 1 that can accommodate the gripping piece 21 is increased, which is conducive to increasing the length of the single gripping bracket, avoiding the adverse effects caused by uneven bracket size caused by the operator's segmented gripping, ensuring the uniform diameter of the bracket along its length, ensuring that the bracket is evenly stressed when in use, and ensuring the performance of the bracket. At the same time, by increasing the length of a single gripping and reducing the number of gripping times, it is conducive to reducing the operation time and improving efficiency.

[0072] The structure of the inner tube 3 is now introduced. Figure 2 As shown, the inner cylinder 3 includes an inner cylinder body 33 and two movable disks 31. The inner cylinder body 33 is arranged in the outer cylinder 1. The two movable disks 31 are respectively arranged at the two ends of the inner cylinder body 33 along the axial direction. The movable disk 31 is provided with an arc groove 311 corresponding to the second pivot shaft 23. The two ends of the second pivot shaft 23 are respectively inserted into the arc grooves 311 arranged at the two ends. Since the length of the second pivot shaft 23 is relatively long, both sides of the second pivot shaft 23 are inserted into the arc grooves 311, which can ensure the parallelism of multiple second pivot shafts 23, ensure that the diameters of the insertion channels 25 at various positions of the second pivot shaft 23 along the axial direction are the same, and ensure that the diameters of the insertion channels 25 at various positions along the axial direction change simultaneously and to the same extent.

[0073] Further, such as Figure 2 As shown, the outer peripheral wall of the inner cylinder 3 is provided with scale lines 6, which are provided at the opening 14, and the scale lines 6 can indicate the crimping size of the crimping device 100. During the crimping process, the operator can understand the diameter of the stent by observing the change of the scale lines 6, and gradually reduce the aperture of the stent to the specified diameter, thereby achieving controllable crimping of the stent in the insertion channel 25, which can improve the crimping accuracy of the crimping device 100 and reduce the risk of surgery.

[0074] As a preferred solution, the inner circumference of the outer cylinder 1 and the outer circumference of the inner cylinder 3 are matched with each other, and the gap between the inner circumference of the outer cylinder 1 and the outer circumference of the inner cylinder 3 is minimized. When the inner cylinder 3 rotates relative to the outer cylinder 1, the outer cylinder 1 guides the rotation of the inner cylinder 3, so that the rotation of the inner cylinder 3 relative to the outer cylinder 1 is smooth, which can avoid the gap between the inner cylinder 3 and the outer cylinder 1 being too large, so that the inner cylinder 3 twists during the rotation process, thereby achieving a stable rotation effect. Specifically, the gap between the outer cylinder 1 and the inner cylinder 3 in the radial direction can be 0.5mm to 1mm. In addition, the inner cylinder 3 can block the opening 14, which can prevent dust and bacteria from entering the crimping assembly 2 through the gap, and prevent dust from entering the plug-in channel 25, ensuring that the stent is in a dust-free and sterile environment.

[0075] The structures of the first handle 41 and the second handle 42 are now introduced as a preferred solution. Figure 1 and Figure 3As shown, the first handle 41 is detachably connected to the inner tube 3, and the second handle 42 is detachably connected to the outer tube 1. When the first handle 41 and the second handle 42 need to be repaired or replaced, the detachable connection method has the effect of facilitating the repair of the crimping device 100.

[0076] As a preferred solution, the first handle 41 and the second handle 42 can be set to a variety of different sizes, and different sizes can be designed according to male and female operators. By installing first handles 41 of different sizes and second handles 42 of different sizes on the inner tube 3 or the outer tube 1, they are suitable for use by different operators, improving the operator's experience. In other embodiments, the first handle 41 can be made into a variety of different structures, and the second handle 42 can be made into a variety of different structures. Different structural designs are conducive to replacement according to the operator's operating requirements and are convenient for replacement during maintenance.

[0077] When the operator has compressed the stent to the required diameter, the compression and gripping is stopped, and then liquid nitrogen is poured into one end of the insertion channel 25 to complete the compression and gripping of the stent before loading. In this process, the operator needs to continue to maintain the compression and gripping posture. However, the temperature of the liquid nitrogen drops significantly during the volatilization process, resulting in a significant drop in the temperature of the compression and gripping device 100. If the first handle 41 and the second handle 42 are made of metal material, the operator will feel frozen hands due to the high thermal conductivity of metal. In order to solve the above problems, as a preferred solution, the first handle 41 and the second handle 42 are made of plastic. Since plastic has low thermal conductivity, the operator's hands can be prevented from freezing.

[0078] As a preferred solution, Figure 3 As shown, a reset member 43 is provided between the first handle 41 and the second handle 42 . After the operator completes the pressing and gripping action, the first handle 41 and the second handle 42 will automatically return to their initial positions under the drive of the reset member 43 .

[0079] Specifically, Figure 3 As shown, the first handle 41 is provided with a first mounting groove 411, the second handle 42 is provided with a second mounting groove 421 which is opposite to the first mounting groove 411, and the two ends of the reset member 43 are respectively inserted into the first mounting groove 411 and the second mounting groove 421, so as to facilitate the reset member 43 to be more stably installed on the first handle 41 and the second handle 42, and also improve the installation and positioning efficiency of the reset member 43. Specifically, the reset member 43 can be a spring, which can provide a large reset force, and can realize the automatic restoration of the first handle 41 and the second handle 42 to the initial position. At the same time, the spring has low cost and is easy to purchase.

[0080] A limit assembly 44 is also provided on the first handle 41 or the second handle 42. The limit assembly 44 can limit the minimum size of the bracket being compressed, thereby preventing the operator from using excessive force and causing damage to the bracket.

[0081] As a preferred solution, the limiting assembly 44 can be designed to have different lengths, and different minimum sizes of the crimping device 100 can be determined by selecting limiting assemblies 44 of different lengths.

[0082] Specifically, the limit assembly 44 can be designed as a screw rod, and the minimum size required for crimping can be determined by rotating the screw rod to a specified position. When the operator operates the crimping device 100, the position where the screw rod is located is the minimum size required for crimping by the operator, which is conducive to ensuring that the size of crimping is uniform each time and improving the accuracy of crimping. To obtain different minimum sizes of the crimping device 100, it is only necessary to rotate the screw rod to different positions to change it, which is convenient to operate.

[0083] In other embodiments, the limiting component 44 can be configured to be rod-shaped. The limiting component 44 is inserted into the spring to prevent the spring from bending during compression, thereby ensuring uniform compression of the spring and ensuring a longer service life of the spring.

[0084] Furthermore, the limiting component 44 includes a limiting member and a flexible member, wherein one end of the limiting member is connected to the first handle 41 or the second handle 42, and the flexible member is arranged at the other end of the limiting member. The flexible member can prevent the limiting member from having a rigid collision with the second handle 42, thereby avoiding damage to the first handle 41 or the second handle 42 by the limiting member.

[0085] The specific working process of this embodiment is as follows:

[0086] Before using the handheld crimping assembly 2, no gripping force is applied. Under the support of the reset member 43, the first handle 41 and the second handle 42 are in an open state. At this time, the insertion channel 25 is in a state of maximum size, which is defined as the initial state. When in use, the bracket is inserted through the insertion port 111 of the side wall 11, the bracket is sent into the insertion channel 25, and the front end of the bracket extends from the insertion port 111 of the side wall 1. When crimping, the operator presses the first handle 41 and the second handle 42 with the palm of his hand, so that the first handle 41 and the second handle 42 are close to each other, and the inner cylinder 3 rotates relative to the outer cylinder 1, thereby driving the second pivot shaft 23 to move in the arc groove 311, and then driving the abutment portion 212 to move, so that the insertion channel 25 gradually becomes smaller, and the crimping device 100 can crimp the bracket. The operator can quantify the diameter of the insertion channel 25 through the scale lines 6 on the inner tube 3. When the operator presses the crimping device 100 to the required diameter of the insertion channel 25, the operator maintains the pressing degree of the crimping device 100, and then injects liquid nitrogen through the insertion port 111 to complete the crimping and shaping of the stent. After the crimping and shaping of the stent is completed, it is loaded and installed in the blood vessel.

[0087] Note that the above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A crimping device, characterized in that: include: An outer cylinder (1), wherein an opening (14) is provided on an outer cylinder wall (13) of the outer cylinder (1), and an insertion port (111) is provided at an end portion of the outer cylinder (1) along an axial direction thereof; a plurality of crimping assemblies (2), arranged inside the outer cylinder (1) and pivotally connected to the outer cylinder (1); the plurality of crimping assemblies (2) are arranged along the circumference of the outer cylinder (1); a side of the plurality of crimping assemblies (2) away from the outer cylinder (1) jointly forms a plug-in channel (25) connected to the plug-in interface (111); An inner cylinder (3) is arranged inside the outer cylinder (1), and a driving structure connected to the crimping assembly (2) is arranged on the inner cylinder (3); a first handle (41) and a second handle (42), wherein one end of the first handle (41) is connected to the inner tube (3), the other end of the first handle (41) extends outward through the opening (14), and the second handle (42) is connected to the outer tube (1); The first handle (41) and the second handle (42) can move closer to or farther from each other, so that the inner cylinder (3) rotates relative to the outer cylinder (1), and the driving structure can drive the crimping assembly (2) to rotate relative to the outer cylinder (1), so that the diameter of the insertion channel (25) becomes smaller or larger; The dimension of the outer cylinder (1) along the axial direction is 100 mm to 150 mm; The crimping assembly (2) comprises: A gripping piece (21); a first pivot shaft (24) connected to the pressing and gripping piece (21) and extending along the length direction of the pressing and gripping piece (21), the first pivot shaft (24) being pivotally connected to the outer cylinder (1); and a second pivot shaft (23) connected to the pressing and gripping piece (21) and extending along the length direction of the pressing and gripping piece (21); the driving structure is an arc-shaped groove (311) provided on the inner cylinder (3); the second pivot shaft (23) is inserted into the arc-shaped groove (311); when the inner cylinder (3) rotates relative to the outer cylinder (1), the second pivot shaft (23) slides in the arc-shaped groove (311) so that the pressing and gripping piece (21) rotates relative to the outer cylinder (1); The first handle (41) and the second handle (42) are made of plastic.

2. The crimping device according to claim 1, characterized in that: The crimping assembly (2) further comprises: A connecting block (22) is connected to the pressure gripping piece (21), and a first through hole (221) and a second through hole (222) are provided on the connecting block (22), the first through hole (221) is connected to the first pivot axis (24), and the second through hole (222) is connected to the second pivot axis (23).

3. The crimping device according to claim 1, characterized in that: The pressure gripping piece (21) comprises an abutment portion (212), the abutment portion (212) comprising a supporting plane (2122) and an abutment inclined plane (2121) arranged at an acute angle, and an end of the abutment portion (212) abuts against the supporting plane (2122) of an adjacent abutment portion (212).

4. The crimping device according to claim 1, characterized in that: The inner cylinder (3) comprises: An inner cylinder body (33) is arranged inside the outer cylinder (1); and Two movable plates (31) are respectively arranged at two ends of the inner cylinder body (33) along the axial direction, and the movable plates are provided with arc-shaped grooves (311) corresponding to the second pivot shaft (23), and the two ends of the second pivot shaft (23) are respectively inserted into the corresponding arc-shaped grooves (311).

5. The crimping device according to any one of claims 1 to 4, characterized in that: The inner circumferential surface of the outer cylinder (1) and the outer circumferential surface of the inner cylinder (3) are clearance-matched.

6. The crimping device according to any one of claims 1 to 4, characterized in that: The outer peripheral wall of the inner cylinder (3) is provided with scale lines (6), the scale lines (6) are arranged at the opening (14), and the scale lines (6) can indicate the crimping size of the crimping device.

7. The crimping device according to any one of claims 1 to 4, characterized in that: A restoring member (43) is provided between the first handle (41) and the second handle (42), and the restoring member is configured to restore the first handle (41) to an initial position.

8. The crimping device according to claim 7, characterized in that: The first handle (41) is provided with a first mounting groove (411), the second handle (42) is provided with a second mounting groove (421), and two ends of the resetting member (43) are respectively inserted into the first mounting groove (411) and the second mounting groove (421).

9. The crimping device according to claim 8, characterized in that: A rod-shaped limiting component (44) is also provided on the first handle (41) or the second handle (42); the reset component (43) is a spring; and the limiting component (44) is inserted into the spring.

10. The crimping device according to claim 9, characterized in that: The limiting component (44) is a screw rod, and the screw rod is threadedly connected to the first handle (41) or the second handle (42).

11. The crimping device according to claim 9, characterized in that The limiting component (44) comprises: a limiting member, one end of which is connected to the first handle (41) or the second handle (42); and The flexible member is arranged at the other end of the limiting member.

12. The crimping device according to any one of claims 1 to 4, characterized in that: The first handle (41) is detachably connected to the inner cylinder (3), and the second handle (42) is detachably connected to the outer cylinder (1).

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