CN216221858U - Pressing and holding device for medical support - Google Patents

Abstract

The utility model provides a crimping device for a medical stent. The pressing and holding device comprises a clamping part, a pressing and holding part and a rebounding part. The clamping portion includes a plurality of clamping members. The pressing and holding part comprises a first pressing and holding piece and a second pressing and holding piece, the first pressing and holding piece comprises a first handle and a first panel which are fixedly connected, and the second pressing and holding piece comprises a second handle and a second panel which are fixedly connected. The first panel and the second panel are respectively provided with a plurality of sliding grooves. The clamping piece comprises at least two sliding chuck protrusions, the sliding grooves of the first panel and the second panel are respectively inserted into the at least two sliding chuck protrusions, and the sliding chuck protrusions are driven to drive the clamping piece to clamp the medical support. The resilient portion includes a first end and a second end, the first end is connected with the first handle and/or the second end is connected with the second handle. The pressing and holding device is provided with the rebounding part on the handle, the handle can rebound to the initial position automatically, manual shifting of the handle is not needed, the operation steps are simplified, the controllability and the stability of pressing and holding are improved, and the shape of the medical support after pressing and holding is more uniform.

Description

Pressing and holding device for medical support

Technical Field

The utility model relates to a crimping device for a medical stent.

Background

The transcatheter aortic valve replacement is suitable for high-risk or contraindication patients who cannot perform conventional cardiac surgery, and is an effective means for treating patients with aortic stenosis. For example, the balloon valve is widely used in clinic due to its advantages such as small size and strong radial support. Before the balloon-expandable valve is used, the valve stent is usually crimped into a small-sized valve stent by a crimping device and loaded on a balloon, and the catheter delivery system is accurately placed at a lesion position.

The inner surface of a clamping opening of most of the existing clamping devices cannot be completely attached to the valve stent, so that the stress is uneven or the clamping is not in place in the clamping process, the shape of the clamped valve stent is uneven and round, and the stent is difficult to load into a conveying system smoothly; and the crimping process is cumbersome, resulting in a long time to load the valve stent into the delivery system, affecting the surgical time and therapeutic efficacy of the transcatheter aortic valve replacement procedure.

SUMMERY OF THE UTILITY MODEL

At least one embodiment of the utility model provides a pressing and holding device for a medical support, which comprises a clamping part, a pressing and holding part and a rebounding part. The clamping portion includes a plurality of clamps configured to clamp the medical stent. The pressing and holding part comprises a first pressing and holding piece and a second pressing and holding piece which are rotatably connected with each other, the first pressing and holding piece comprises a first grip and a first panel which are fixedly connected, and the second pressing and holding piece comprises a second grip and a second panel which are fixedly connected. A plurality of sliding grooves are respectively arranged on the first panel and the second panel. Each clamping piece comprises at least two sliding chuck bulges, and the at least two sliding chuck bulges are respectively inserted into corresponding sliding grooves on the first panel and the second panel, so that the sliding chuck bulges are driven to slide in the sliding grooves through the movement of the first handle and/or the second handle to drive the plurality of clamping pieces to clamp the medical support. The resilient portion comprises a first end and a second end, wherein the first end is connected with the first grip and/or the second end is connected with the second grip.

For example, in at least one embodiment of the present invention, the first end and the second end of the resilient portion are respectively and fixedly connected to a side of the first grip and a side of the second grip that are close to each other.

For example, in at least one embodiment of the present invention, a first end of the resilient portion is fixedly connected to 1/3L 1-2/3L 1 in a length direction of the first grip, a second end of the resilient portion is fixedly connected to 1/3L 2-2/3L 2 in a length direction of the second grip, L1 is a distance from an end of the first grip close to the first panel to an end of the first grip far from the first panel in the length direction, and L2 is a distance from an end of the second grip close to the second panel to an end of the second grip far from the second panel in the length direction.

For example, in at least one embodiment of the present invention, a squeezing device is provided, in which the resilient portion includes a compression spring and/or a torsion spring.

For example, in at least one embodiment of the present invention, a crimping device is provided wherein the compression spring includes a first segment and a second segment connected. The first section is fixedly connected with the first handle, the axial direction of the whole of at least one part of the first section, which is close to the first handle, is vertical to the length direction of the first handle, the second section is fixedly connected with the second handle, and the axial direction of the whole of at least one part of the second section, which is close to the second handle, is vertical to the length direction of the second handle.

For example, in at least one embodiment of the present invention, an angle between an axial direction of at least a portion of the first segment adjacent to the first grip and an axial direction of at least a portion of the second segment adjacent to the second grip is 150 ° to 180 °.

For example, at least one embodiment of the present invention provides a crimping device wherein the free angle between the arms of the torsion spring is between 60 ° and 90 °.

For example, at least one embodiment of the present invention provides a squeezing device, wherein at least a portion of a gripping edge of at least one of the first grip and the second grip is provided with at least three arc-shaped recesses.

For example, in the crimping device provided by at least one embodiment of the present invention, the plurality of clamping members are uniformly arranged along the circumferential direction of the first panel and/or the second panel, the plurality of clamping members surround the clamping opening for clamping the medical stent, and the radial dimension of the clamping opening is 6.5mm-17.5 mm.

For example, in a crimping device provided by at least one embodiment of the present invention, a plurality of sliding grooves are uniformly arranged on the first panel and the second panel around the circumferential direction of the clamping opening, wherein each sliding groove includes a radial inner end and a radial outer end opposite to each other in the extending direction, the distance from the radial outer end to the clamping opening is larger than the distance from the radial inner end to the clamping opening, and the radial inner end and the radial outer end of the plurality of sliding grooves are arranged at intervals in the circumferential direction.

For example, in the pressing and holding device provided by at least one embodiment of the present invention, each sliding slot is arc-shaped, and a center of the sliding slot is located at a side of the sliding slot close to the clamping opening.

Compared with the prior art, the beneficial effects of at least one embodiment of the utility model at least comprise: according to the squeezing device provided by the embodiment of the utility model, the rebounding part is arranged on the handle of the squeezing part, so that the handle can automatically rebound to the initial position after one squeezing operation is finished, the handle does not need to be manually pushed, the operation steps are simplified, the preoperative preparation time is shortened, the operation efficiency is improved, and meanwhile, the treatment effect is prevented from being influenced due to the reduction of physical properties caused by dehydration of the valve prosthesis. In addition, based on the resilience part on the handle, the pressing and holding process can be slowly operated, the controllability and stability of pressing and holding are improved, the shape of the pressed and held medical support is more uniform, the medical support is more convenient to load, and the comfort degree of a user in use is also improved due to the special design of the handle of the pressing and holding part.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of a natural state crimping device provided in accordance with some embodiments of the present invention;

FIG. 2 is a front view of the squeezing device in a gripping state according to some embodiments of the present invention;

FIG. 3 is a schematic structural view of a squeezing device with a compression spring for a resilient portion according to some embodiments of the present invention;

fig. 4 is a schematic structural diagram of a crimping device with a torsion spring for a resilient portion according to some embodiments of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The use of "first," "second," and similar language in the embodiments of the present invention does not denote any order, quantity, or importance, but rather the terms "first," "second," and similar language are used to distinguish one element from another. The use of the terms "a" and "an" or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. Likewise, the word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The inventor of the utility model finds that, for example, a small handheld crimping device is adopted, a grip of the crimping device is gripped by a single hand to drive an internal clamping piece to move radially, so that local crimping and correction of the valve stent can be realized, the crimped valve stent can be more uniform in shape and convenient to load.

The inventor of the present invention has also found that some small hand-held crimping devices also have the following problems during use: when the handheld pressing and holding device is used for pressing and holding the correction valve support, the pressing and holding can be completed at one time, the shape of the valve support needs to be adjusted through pressing and holding for many times, and then the handle needs to be manually stirred to return to the initial position for the next pressing and holding. Therefore, if the valve stent is pressed and held for a plurality of times, the handle needs to be repeatedly gripped and pulled back in the using process, which brings inconvenience to the operator. In addition, most of the handles of the handheld pressing and holding devices are of a plate-shaped structure, and when an operator applies force during the pressing and holding process, a certain reaction force is generated on the hands, so that the hands of the user are uncomfortable.

At least one embodiment of the utility model provides a pressing and holding device for a medical support, which comprises a clamping part, a pressing and holding part and a rebounding part. The clamping portion includes a plurality of clamps configured to clamp the medical stent. The pressing and holding part comprises a first pressing and holding piece and a second pressing and holding piece which are rotatably connected with each other, the first pressing and holding piece comprises a first grip and a first panel which are fixedly connected, and the second pressing and holding piece comprises a second grip and a second panel which are fixedly connected. A plurality of sliding grooves are respectively arranged on the first panel and the second panel. Each clamping piece comprises at least two sliding chuck bulges, and the at least two sliding chuck bulges are respectively inserted into corresponding sliding grooves on the first panel and the second panel, so that the sliding chuck bulges are driven to slide in the sliding grooves through the movement of the first handle and/or the second handle to drive the plurality of clamping pieces to clamp the medical support. The resilient portion includes a first end and a second end, the first end is connected with the first handle and/or the second end is connected with the second handle.

According to the squeezing device provided by the embodiment of the utility model, the rebounding part is arranged on the handle of the squeezing part, so that the handle can automatically rebound to the initial position after one squeezing operation is finished, the handle does not need to be manually pushed, the operation steps are simplified, the preoperative preparation time is shortened, the operation efficiency is improved, and meanwhile, the treatment effect is prevented from being influenced due to the reduction of physical properties caused by dehydration of the valve prosthesis. In addition, based on the resilience part on the handle, the pressing and holding process can be slowly operated, the controllability and stability of pressing and holding are improved, the shape of the pressed and held medical support is more uniform, and the medical support is more convenient to load.

Embodiments of the present invention and examples thereof are described in detail below with reference to the accompanying drawings.

For convenience of description, in the embodiment of the present invention, a side of the panel of fig. 1 close to the clamping opening in the radial direction is referred to as an inner side, and a side away from the clamping opening and close to the edge of the panel is referred to as an outer side.

Fig. 1 is a front view of a crimping device according to some embodiments of the present invention, and fig. 1 shows a natural state of the crimping device. Fig. 2 is a front view of the squeezing device according to other embodiments, and fig. 2 shows a gripping state of the squeezing device.

For example, as shown in fig. 1 and 2, at least one embodiment of the present invention provides a squeezing device including a clamping portion 100, a squeezing portion 200, and a resilient portion 300. The clamping portion 100 includes a plurality of clamping members 110 configured to clamp a medical stent. The pressing portion 200 includes a first pressing member 210 and a second pressing member 220 which are rotatably connected to each other, the first pressing member 210 includes a first grip 211 and a first panel 212 which are fixedly connected to each other, and the second pressing member 220 includes a second grip 221 and a second panel 222 which are fixedly connected to each other.

In some examples, the first grip 211 and the first panel 212 of the first press-gripping member 210 may be integrally formed, or may be two separate parts and fixedly connected. In some examples, the second grip 221 and the second panel 222 of the second press-gripping member 220 may be integrally formed, or may be two separate parts and fixedly connected.

For example, as shown in fig. 1 and 2, the plurality of clamping members 110 are uniformly arranged along the circumferential direction of the first panel 212 and/or the second panel 222, and the plurality of clamping members 110 surround the clamping opening 120 for clamping the medical stent. Each of the clamping members 110 includes a fixedly connected chuck body 111 and at least two sliding chuck protrusions 112, and the at least two sliding chuck protrusions 112 are respectively located on both sides of the chuck body 111, for example, the clamping member 110 includes two sliding chuck protrusions 112 respectively located on both sides of the chuck body 111, i.e., one sliding chuck protrusion 112 is located on one side of the chuck body 111 close to the first panel 212, and the other sliding chuck protrusion 112 is located on one side of the chuck body 111 close to the second panel 222.

For example, as shown in fig. 1, a plurality of sliding grooves 2a are respectively disposed on the first panel 212 and the second panel 222, and the plurality of sliding grooves 212a are uniformly arranged on the corresponding panel, such as the first panel 212 or the second panel 222, around the circumference of the clamping opening 120. Each of the chutes 2a includes a radially inner end P1 and a radially outer end P2 opposite in the extending direction, the distance from the radially outer end P2 to the gripping port 120 is larger than the distance from the radially inner end P1 to the gripping port 120, and the radially inner ends P1 and the radially outer ends P2 of the plurality of chutes 2a are arranged at intervals in the circumferential direction of the corresponding panel. For example, in fig. 1, the radial outer end P2 of the previous link 2a, the radial inner end P1 of the previous link 2a, the radial outer end P2 of the next link 2a, and the radial inner end P1 of the next link 2a are arranged in this order in the circumferential direction of the panel in the clockwise direction. Each sliding chute 2a is arc-shaped along the extending direction, and the center of the arc-shaped sliding chute 2a is located at one side of the sliding chute 2a close to the clamping opening 120.

In some examples, the collet body 111 of each of the grippers 110 is located between the first panel 212 and the second panel 222, and the two sliding collet protrusions 112 of each of the grippers 110 are respectively inserted into the corresponding slide slots 2a of the first panel 212 and the second panel 222, so that the first crimp member 210 and the second crimp member 220 are rotatably connected coaxially. Thus, the embodiment of the present invention drives the sliding chuck protrusions 112 to slide in the sliding groove 2a by the movement of the first handle 211 and/or the second handle 221 to drive the plurality of clamping members 110 to clamp and press the medical stent.

In some examples, when an operator holds the pressing portion 200 and drives at least one of the first grip 211 and the second grip 221 to move, the corresponding panel is driven to rotate two-dimensionally along the circumferential direction, the sliding chuck protrusion 112 of the clamping member 110 slides in the sliding slot 2a on the panel, and the chuck main body 111 of the clamping member 110 moves inward or outward along the radial direction, so that the aperture of the clamping port 120 becomes smaller or larger for clamping and pressing the medical stent.

In some examples, the first grip 211 and the second grip 221 may be moved simultaneously, or one of the grips may be moved while the other grip is not moved, as long as the grips of the two pressing members may be close to or far from each other, which is not limited by the embodiment of the present invention.

For example, the first grip 211 and the second grip 221 of the pressure-grip portion 200 may be brought closer to or farther from each other by one-handed kneading. Thus, the operation is very simple and convenient.

In some examples, when the first grip 211 and the second grip 221 of the pressing portion 200 approach each other, for example, the sliding chuck protrusion 112 in fig. 1 slides in the sliding slot 2a in a clockwise direction, so that the chuck main body 111 of the clamping member 110 is displaced inward in a radial direction, that is, the sliding chuck protrusion 112 moves from the radially outer end P2 of the sliding slot 2a to the radially inner end P1, and is closer to the center of the clamping opening 120 in the radial direction, so that the clamping member 110 gradually approaches the center, and the aperture of the clamping opening 120 becomes smaller, for example, the larger aperture in fig. 1 is changed to the smaller aperture in fig. 2. For another example, when the first grip 211 and the second grip 221 of the pressure-grasping portion 200 are separated from each other, the cartridge body 111 of the clamping member 110 is displaced outward in the radial direction, and the aperture of the clamping port 120 becomes larger.

It should be noted that the structural design of the clamping portion 100 and the pressing portion 200 of the present invention is not limited to the above-mentioned embodiment, for example, the arc length direction of the sliding slot 2a may not be limited to that shown in fig. 1, as long as the sliding chuck protrusion 112 can displace the clamping member 110 in the radial direction when sliding in the sliding slot 2a to change the aperture of the clamping opening 120, which is not the important point of the present invention and is not described herein again.

For example, as shown in fig. 1, resilient portion 300 includes a first end 310 and a second end 320, first end 310 being connected to first grip 211, and/or second end 320 being connected to second grip 221. For example, the first end 310 is connected with the first grip 211 and the second end 320 is not connected with the second grip 221. For another example, the first end 310 is not connected to the first handle 211 and the second end 320 is connected to the second handle 221. For another example, the first end 310 is connected to the first handle 211 and the second end 320 is connected to the second handle 221. It should be noted that first end 310 and second end 320 of rebound 300 of the present disclosure refer to one end and the other end of the two opposite ends of rebound 300, respectively, and first end 310 and second end 320 are merely for convenience of description and are not a limitation of the present disclosure. Likewise, the first grip 211 and the second grip 221 of the present disclosure are also referred to as either of the two grips, and the first grip 211 and the second grip 221 are merely for convenience of description and are not a limitation of the present disclosure.

Therefore, according to the embodiment of the utility model, the handle can automatically rebound to the initial position after one-time press-holding is completed through the rebound part arranged on the handle, the handle is not required to be manually shifted, and the next press-holding can be completed only by tightly holding the handle again by an operator, so that the operation steps of the operator are reduced, the preoperative preparation time is shortened, and the operation efficiency is improved. In addition, based on the resilience part on the handle, the pressing and holding process can be slowly operated, the controllability and stability of pressing and holding are improved, the shape of the pressed and held medical support is more uniform, and the loading is more facilitated.

It should be noted that, the medical stent according to the embodiment of the present invention includes, but is not limited to, a heart valve stent, that is, the type of the stent according to the embodiment of the present invention is not limited, and the stent may be any medical stent for treating various indications, and the details are not repeated herein.

In some examples, first end 310 and second end 320 of resilient portion 300 are fixedly attached to the side of first grip 211 and second grip 221, respectively, that are adjacent to each other. Therefore, the operation is very simple and convenient, the rebound effect of the rebound part is facilitated, and the cost of the rebound part is also saved.

In some examples, first end 310 of resilient portion 300 is fixedly attached to first grip 211 at 1/3L1 ~ 2/3L1 in the length direction, and second end 320 of resilient portion 300 is fixedly attached to second grip 221 at 1/3L2 ~ 2/3L2 in the length direction, wherein L1 is the distance from the end of first grip 211 near first panel 212 to the end far from first panel 212 in the length direction, and L2 is the distance from the end of second grip 221 near second panel 222 to the end far from second panel 222 in the length direction. Therefore, the pressing and holding of the handle can be conveniently completed in a labor-saving manner, the controllability and the stability of the pressing and holding can be ensured, and the uniformity of the shape of the medical support is facilitated.

For example, the first end 310 of the resilient portion 300 is fixedly connected to 1/2L1 in the longitudinal direction of the first grip 211, and the second end 320 of the resilient portion 300 is fixedly connected to 1/2L2 in the longitudinal direction of the second grip 221. So, can avoid resilience portion too close to panel one side and cause the pressure to hold hard and avoid influencing the aperture size of centre gripping mouth for the homogeneity of medical support's form is better, also can avoid resilience portion too far away from panel one side and influence the controllability and the stability of pressure holding simultaneously.

Fig. 3 is a schematic structural diagram of a crimping device of which the rebounding part adopts a compression spring according to some embodiments of the utility model, and fig. 3 shows a free state of the compression spring.

For example, as shown in fig. 3, the resilient portion 300 includes a compression spring 300 a. Therefore, the rebound part of the pressing and holding device is simple in structure, convenient to operate and low in cost.

For example, as shown in FIG. 3, compression spring 300a includes a first section 330 and a second section 340 connected. The first segment 330 is fixedly connected to the first grip 211, the axial direction O1 of the whole of at least a portion of the first segment 330 adjacent to the first grip 211 is perpendicular to the longitudinal direction of the first grip 211, the second segment 340 is fixedly connected to the second grip 221, and the axial direction O2 of the whole of at least a portion of the second segment 340 adjacent to the second grip 221 is perpendicular to the longitudinal direction of the second grip 221. So, can furthest act on the handle with the elasticity of resilience portion, the resilience effect is better, and efficiency is higher.

In some examples, the first section 330 and the second section 340 are integrally formed, i.e., the compression spring 300a is a continuous spring structure, and for the convenience of description herein, the compression spring 300a is illustrated as being divided into two parts, the first section 330 and the second section 340. In other examples, the compression spring 300a may further include a third section (not shown) through which the first section 330 is connected to the second section 340. It should be noted that the pitch or radial dimension of the first, second and third sections 330, 340 and 300a of the compression spring 300a may be the same or different, and the embodiment of the disclosure is not limited thereto.

In some examples, a method of using compression spring 300a for rebound 300 includes: when the operator pinches the first grip 211 and the second grip 221 of the pressing unit 200 with one hand, the first grip 211 and the second grip 221 approach each other, the aperture of the grip hole 120 becomes smaller, and at this time, the compression spring 300a is compressed and deformed from the natural state shown in fig. 1 to the state shown in fig. 2, thereby completing one pressing of the medical stent. When the operator looses or reduces the grip force of the hand, the first grip 211 and the second grip 221 will automatically move away from each other under the resilience of the compression spring 300a, the aperture of the grip opening 120 will become larger, and the compression spring 300a will return to the natural state shown in fig. 2 from the state shown in fig. 2.

In some examples, the axial direction O1 of the entirety of at least a portion of the first section 330 that is proximate to the first grip 211 is angled 150 ° -180 ° from the axial direction O2 of the entirety of at least a portion of the second section 340 that is proximate to the second grip 221. Thus, the elastic force of the springback part can be applied to the grip as much as possible, and the springback effect is good and the efficiency is high. It should be noted that the included angle of 150 ° to 180 ° in this example refers to an angle that the compression spring 300a takes in a state of not being subjected to an external force.

In some examples, the compression spring 300a has an arc shape, for example, the first section 330 and the second section 340 may smoothly transition between, an end of the first section 330 of the compression spring 300a near the first grip 211 is perpendicular to the length direction of the first grip 211, and an end of the second section 340 of the compression spring 300a near the second grip 221 is perpendicular to the length direction of the second grip 221. This is merely exemplary and not a limitation of the present disclosure, for example, compression spring 300a may also be linear, e.g., straight between first section 330 and second section 340 and at an acute angle to the length direction of first grip 211 and second grip 221, respectively. The shape, length, etc. of the compression spring 300a are not limited by the embodiments of the present disclosure as long as the rebound effect can be achieved, and are not described herein again.

In some examples, the material of compression spring 300a may include 302 stainless steel or 316 stainless steel, among others. This is merely exemplary and is not a limitation of the present invention.

In some examples, the first section 330 and the second section 340 of the compression spring 300a are axisymmetrical, i.e., the compression spring 300a is substantially symmetrical in structure. So, be favorable to compression spring 300 a's resilience effect, the resilience effect is stable, is favorable to the homogeneity of medical support's form. This is merely exemplary and is not a limitation of the present invention.

Fig. 4 is a schematic structural diagram of a crimping device of which the rebounding portion adopts a torsion spring according to some embodiments of the present invention, and fig. 4 shows a free state of the torsion spring.

For example, as shown in fig. 4, the spring back 300 includes a torsion spring 300 b. Therefore, the rebound part of the pressing and holding device is simple in structure, convenient to operate and low in cost.

In some examples, the free angle α between the two arms of the torsion spring 300b is 60 ° -90 °. Therefore, the operation is very simple and convenient, and the rebound effect of the torsion spring is better. For example, as shown in fig. 4, a free angle a between the two arms of the torsion spring 300b is an included angle formed by the first arm 350 and the second arm 360 of the torsion spring 300 b. It should be noted that the free angle α of 60 ° to 90 ° refers to an included angle under a state of no external force, and does not refer to a range interval in which an included angle is variable; during the crimping process, an included angle formed by the first arm 350 and the second arm 360 may be smaller than the free angle a.

In some examples, first arm 350 and second arm 360 of torsion spring 300b are equal in length. So, be favorable to torsion spring 300 b's resilience effect, the resilience effect is stable, is favorable to the homogeneity of medical support's form. This is merely exemplary and is not a limitation of the present invention.

In some examples, the material of the torsion spring 300b may include 302 stainless steel or 316 stainless steel, among others. This is merely exemplary and is not a limitation of the present invention.

In some examples, the maximum torque of torsion spring 300b is 5N mm-15N mm. Therefore, the medical stent clamping device is not only suitable for various types of medical stents, but also can avoid the problem that the medical stent is excessively clamped or cannot reach the clamping size. This is merely exemplary and is not a limitation of the present invention.

For the details of the method of using the torsion spring 300b for the rebound portion 300, reference may be made to the compression spring 300a described above, and details thereof will not be described here.

For example, as shown in fig. 1, at least a portion of the holding edge S1 of at least one of the first grip 211 and the second grip 221 is provided with a plurality of arc-shaped recesses a1, and the holding edge is a side edge of the first grip 211 and the second grip 221 which are away from each other. For example, the arc-shaped recesses a1 are three or more arc-shaped recesses a 1. Thus, the comfort of the hands of the operator is improved.

For example, in the example of fig. 1, the gripping edge S1 of the first grip 211 is provided with four arc-shaped recesses a1 that conform to the contours of the operator' S fingers. Therefore, the comfort degree of an operator in use can be better improved.

In some examples, the radial dimension of the gripping opening 120 is 6.5mm to 17.5mm, and the radial dimension of the gripping opening 120 refers to the range of dimensional variation of the gripping opening 120 during gripping. As such, the crimping device of embodiments of the present invention may be adapted for use with various types of medical stents. This is merely exemplary and is not a limitation of the present invention.

The following points need to be explained:

(1) the drawings of the embodiments of the utility model only relate to the structures related to the embodiments of the utility model, and other structures can refer to common designs.

(2) Without conflict, embodiments of the present invention and features of the embodiments may be combined with each other to arrive at new embodiments.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention should be subject to the scope of the claims.

Claims (11)

1. A crimping device for a medical stent, comprising:

a clamping portion comprising a plurality of clamping members configured to clamp the medical stent;

the clamping part comprises a first clamping part and a second clamping part which are mutually and rotatably connected, the first clamping part comprises a first handle and a first panel which are fixedly connected, the second clamping part comprises a second handle and a second panel which are fixedly connected, a plurality of sliding grooves are respectively formed in the first panel and the second panel, each clamping part comprises at least two sliding chuck bulges, and the at least two sliding chuck bulges are respectively inserted into the corresponding sliding grooves in the first panel and the second panel, so that the sliding chuck bulges are driven to slide in the sliding grooves through the movement of the first handle and/or the second handle to drive the plurality of clamping parts to clamp the medical bracket;

a resilient portion comprising a first end and a second end, wherein the first end is connected with the first grip and/or the second end is connected with the second grip.

2. The crimping device according to claim 1,

the first end and the second end of the springback portion are respectively fixedly connected to one side of the first handle and one side of the second handle, which are close to each other.

3. The crimping device according to claim 1,

the first end of the springback part is fixedly connected with 1/3L 1-2/3L 1 in the length direction of the first grip, the second end of the springback part is fixedly connected with 1/3L 2-2/3L 2 in the length direction of the second grip,

wherein L1 is the distance in the length direction of the first grip from the end proximal to the first panel to the end distal to the first panel, and L2 is the distance in the length direction of the second grip from the end proximal to the second panel to the end distal to the second panel.

4. The crimping device according to any one of claims 1 to 3,

the resilient portion comprises a compression spring and/or a torsion spring.

5. The crimping device according to claim 4,

the compression spring comprises a first section and a second section;

the first section is fixedly connected with the first handle, and the axial direction of the whole of at least one part of the first section, which is close to the first handle, is vertical to the length direction of the first handle;

the second section is fixedly connected with the second handle, and the axial direction of the whole of at least one part of the second section, which is close to the second handle, is vertical to the length direction of the second handle.

6. The crimping device according to claim 5,

the included angle formed by the axial direction of the whole of at least one part of the first section and the first handle close to each other and the axial direction of the whole of at least one part of the second section and the second handle close to each other is 150-180 degrees.

7. The crimping device according to claim 4,

the free angle between the two arms of the torsion spring is 60-90 degrees.

8. The crimping device according to claim 1,

at least part of the holding edge of at least one of the first handle and the second handle is provided with at least three arc-shaped recesses.

9. The crimping device according to claim 1,

the plurality of clamping pieces are uniformly arranged along the circumferential direction of the first panel and/or the second panel, the plurality of clamping pieces surround to form a clamping opening used for clamping the medical support, and the radial size of the clamping opening is 6.5mm-17.5 mm.

10. The crimping device according to claim 9,

the plurality of sliding grooves surround the circumferential direction of the clamping opening and are evenly distributed on the first panel and the second panel, each sliding groove comprises a radial inner end and a radial outer end which are opposite along the extending direction, the distance from the radial outer end to the clamping opening is greater than the distance from the radial inner end to the clamping opening, and the radial inner ends and the radial outer ends of the plurality of sliding grooves are arranged at intervals along the circumferential direction.

11. The crimping device according to claim 9 or 10,

each sliding groove is in an arc shape, and the circle center in each sliding groove is located on one side, close to the clamping opening, of each sliding groove.

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