CN216439375U

CN216439375U - Elastic clamping piece and clamping device

Info

Publication number: CN216439375U
Application number: CN202123217700.0U
Authority: CN
Inventors: 王宝; 傅丹; 徐军; 林林
Original assignee: Shanghai Huihe Healthcare Technology Co Ltd
Current assignee: Shanghai Huihe Healthcare Technology Co Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-05-06
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses an elastic clamping piece and a clamping device, comprising: a mounting portion for fixing the elastic clamp; at least one first arm, one side of which abuts against the human tissue to fix the human tissue; the other side of the first arm, which is opposite to the one side, is provided with an elastic element, and under the working state, the clamping force of the first arm on the human body tissue is adjusted by adjusting the deformation of the elastic element. According to the utility model, the elastic element is arranged on the clamping piece, so that the clamping force on the human tissue can be automatically adjusted through the change of the shape of the elastic element, and the problems of human tissue slippage and tearing are solved; the use by operators is convenient; the stress of the elastic clamping piece in the furled state is reduced, the pulling force required for pulling the elastic clamping piece to the furled state is reduced, and the control mechanism is prevented from being broken; the relationship between the two bending angles is reasonably set, so that the stress of the bending part is reduced; the problem that the resilience force of the clamping piece is too large is avoided by setting the bending length relation.

Description

Elastic clamping piece and clamping device

Technical Field

The application relates to the technical field of medical equipment, in particular to an elastic clamping piece and a clamping device.

Background

Human tissue intervention repair is a hot spot of current research, and the technology content is high, and especially in the field of heart valve repair, a plurality of problems still exist. Such as after leaflet clamping, the upper and lower clamping members of the valve coaptation device need to be brought together to a very small angle, typically with the upper clamping member against the upper clamp base: at this time, if the effective length of the clamped valve leaf is short, the valve leaf has the risk of slipping, and the valve leaf cannot be effectively clamped, so that the operation fails; if the leaflets are under too much tension (such as when the leaflets grip too much), there is a risk of the leaflets tearing. The prior art can not control the clamping amount or the clamping force of the valve leaflets, and the clamping amount of the valve leaflets is usually selected through the experience of an operator and the clamping force of the valve leaflets is controlled; this approach is less suitable and risks slippage or tearing of the post-operative leaflets. Therefore, in view of the current state of the art medical devices, there is an urgent need for a new implantation device to solve at least one of the above problems.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems, the utility model provides the elastic clamping piece and the using method thereof, the elastic element is arranged on the clamping piece, the clamping force on the human tissue can be automatically adjusted through the change of the shape of the elastic element, the problem of the human tissue slippage when the clamping force generated by the second arm is insufficient is solved, and the problem that the human tissue is torn due to the overlarge clamping force generated by the second arm is also solved; the utility model is convenient for the operator to use, and does not depend on experience to determine the furling angle. The problem that the furling angle needs to be limited in the prior art is also solved. The stress of the elastic clamping piece in the furled state is reduced, the pulling force required for pulling the elastic clamping piece to the furled state is reduced, and a control mechanism (such as a control wire) is prevented from being broken. Through setting up the barb, make it support by in order to increase contact friction with human tissue, improved the clamping reliability to human tissue. The reasonable relation that sets up two angle of buckling can reduce the stress of bending part, improves life. The reasonable length relation of buckling that sets up can avoid the too big problem of holder resilience force, and the operating personnel of also being convenient for draws in the holder in.

To achieve the above object, according to an aspect of an embodiment of the present invention, there is provided an elastic clamp including:

a mounting portion for fixing the elastic clamp;

at least one first arm, one side of which abuts against the human tissue to fix the human tissue;

the method is characterized in that: the mounting part comprises a connecting base which is connected with the first arm through a bent connecting sheet; the bending radius of a first bending section connected with the connecting base on the connecting piece is R1, and the bending radius of a second bending section connected with the first arm on the connecting piece is R2, wherein R1 is equal to R2.

Optionally, the connection base is provided with a mounting through hole, and the first arm is provided with at least one barb on one side abutted against human tissue.

Optionally, the number of the first arms is two, and the first arms are respectively arranged on the left side and the right side of the connecting base.

Optionally, an elastic element is arranged on the other side, opposite to the one side, of the first arm, and in a working state, the clamping force of the first arm on the human tissue is adjusted by adjusting the deformation of the elastic element.

Optionally, the bending length of the first bending section is greater than or equal to the bending length of the second bending section.

Optionally, the elastic element is at least one of an elastic sheet, an elastic block or a spring.

Optionally, the elastic element is an elastic piece, and only one end of the elastic piece is fixedly connected with the first arm.

Optionally, the clamping member is made of a memory alloy material.

According to a second aspect of embodiments of the present invention, there is provided a method of using a resilient clamp for operating a clamp according to any of the first aspect,

the method comprises the following steps:

operating the control wire to draw the first arm of the elastic clamping piece;

operating a second arm of the lower clamping mechanism, and releasing the first arm after the second arm contacts the human tissue to clamp the human tissue between the first arm and the second arm;

the second arm of the lower clamping mechanism is operated to drive the first arm and the human tissue to be synchronously folded, so that the elastic element is abutted against the upper clamping base to adjust the clamping force applied to the human tissue.

According to a third aspect of embodiments of the present invention, there is provided a clamping device, including: the holder of any of the first aspect;

also comprises

One end of the upper clamp base is connected with the mounting part to fix the clamping piece;

a lower clamping mechanism mounted at the one end of the upper clamp base such that the clamping member is positioned between the lower clamping mechanism and the upper clamp base; the second arm of the lower clamping mechanism is arranged corresponding to the first arm of the clamping piece so as to clamp human tissues.

Optionally, the lower clamping mechanism further comprises a push rod, a push rod head and a rotating arm;

one end of the rotating arm is pivoted with the push rod head, the other end of the rotating arm is pivoted with the second arm, and the push rod is connected with the push rod head to push the push rod head to extend or retract so as to control the furled state of the second arm.

According to a fourth aspect of embodiments of the present invention, there is provided a method of using a clipping device, for operating the clipping device described in the third aspect,

the method comprises the following steps:

operating the control wire to draw the first arm of the elastic clamping piece;

Optionally, in the method described in the fourth aspect, the lower clamping mechanism further includes a push rod, a push rod head, and a rotating arm;

Optionally, the clamping piece is at least provided with a set of back-off matched with the boss of the upper clamping base, the bottom of the clamping piece contacts the bottom of the upper clamping base after assembly, and the back-off butts against the boss of the upper clamping base.

Optionally, the maximum distance between the left and right symmetrically arranged back-off parts of the clamping piece is smaller than the maximum outline size of the upper clamping base; the minimum distance between two back-off buttons on the same side of the first arm is greater than the maximum distance between two side edges of the upper clamp base.

Optionally, a pipe body is installed in the longitudinal through hole of the upper clamp base, the pipe body penetrates through the installation through hole of the elastic piece, the installation through hole is a straight notch, and the longitudinal through hole of the upper clamp base is a round hole.

The technical scheme of the utility model has the following advantages or beneficial effects:

(1) make two angles of buckling equal, can reduce the stress of bending part, make the strain of structure minimum, the fracture risk is minimum, improves life. And the R1 and the R2 are set to be the same numerical value, so that the same tools and processes can be adopted to process the angle during manufacturing, the processing cost and the misoperation of the bending angle are reduced, and the production efficiency is improved. The reasonable length relation of buckling that sets up can avoid the too big problem of holder resilience force, and the operating personnel of also being convenient for draws in the holder in.

(2) Through set up elastic element on the holder, can be through the clamping-force of the change automatic adjustment of elastic element shape to human tissue, overcome the problem of human tissue slippage when the clamping-force that the second arm produced is not enough, also solved the clamping-force that the second arm produced too big, tear the problem of human tissue.

(3) The elastic element is arranged on the clamping piece, so that the furling angle of the clamping piece can be restrained, the operation that the furling angle is too small is avoided, the clamping piece is convenient for an operator to use, and the furling angle is not determined by experience any more. The problem that the furling angle needs to be limited in the prior art is also solved. The elastic element designed by the utility model is beneficial to the rebound of the clamping piece, reduces the clamping difficulty and is convenient for operators to use.

(4) The scheme of arranging the elastic element can not only improve the fatigue resistance of the elastic clamping piece, but also reduce the stress of the elastic clamping piece in a furled state, reduce the pulling force required for pulling the elastic clamping piece to the furled state and prevent a control mechanism (such as a control wire) from being broken.

(5) Through setting up the barb, increase contact friction when making it support against with human tissue, improved the clamping reliability to human tissue.

Drawings

The drawings are included to provide a better understanding of the utility model and are not to be construed as unduly limiting the utility model. Wherein:

FIG. 1 is a schematic illustration of a front view of a resilient clamp according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a top view of a resilient clamp according to an embodiment of the utility model;

FIG. 3 is a schematic diagram of the operation of a clamping device according to an embodiment of the utility model;

FIG. 4 is a schematic view of the operation of a prior art clamping device;

FIGS. 5-6 are schematic views of a clip having a resilient block according to an embodiment of the present invention;

FIGS. 7-11 are schematic views of a clamp with a spring according to an embodiment of the present invention;

FIG. 12 is a schematic view of a clamp free state angle according to an embodiment of the present invention;

FIGS. 13-14 are schematic illustrations of an elastic sheet according to an embodiment of the utility model;

15-16 are schematic illustrations of a clamping device according to an embodiment of the utility model;

FIGS. 17-22 are schematic views of a snap-fit assembly according to another embodiment of the present invention;

fig. 23-25 are schematic diagrams of the assembly of a tube according to another embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which various details of embodiments of the utility model are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the utility model. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

According to an aspect of an embodiment of the present invention, there is provided an elastic clamp.

To address at least one of the above-mentioned problems with existing body implant devices, and in particular with heart valve clamping devices. One embodiment of the present invention provides a resilient clip as shown in fig. 1 and 2, which includes a mounting portion 101 for securing the resilient clip. Including but not limited to mounting the resilient clamp member to the upper clamp base via mounting portion 101 to cooperate with the lower clamp member to clamp body tissue, such as a heart valve. It further comprises at least one first arm 102, one side of which abuts against the human tissue to fixate the human tissue; such as the upper side shown in fig. 1, for abutting and applying a clamping force to human tissue to effect fixation of the tissue. The other side of the first arm, opposite to the one side, such as the lower side of the first arm 102 shown in fig. 1, is provided with an elastic element 103. The resilient member may have a variety of shapes including, but not limited to, the arcuate sheet-like structure shown in fig. 1, and may be made from a variety of resilient materials. Referring to fig. 3, in the working state, the clamping force of the first arm on the human tissue can be adjusted by adjusting the deformation of the elastic element. For example, when the second arm 304 makes the folding angle of the clipping device smaller, the elastic element is abutted against the upper clip base 305 and is in a compressed state, so as to absorb part of the clipping force of the second arm, i.e. there is a buffering effect, so as to reduce the clipping force applied to the human tissue 303 and prevent the human tissue from being torn due to an excessive force applied to the human tissue. When the second arm makes the furling angle of the clamping device insufficient, the elastic element is abutted against the upper clamp base 305 and releases the stored elastic force, namely the deformation of the elastic element is reduced, so that the first arm and the second arm apply enough clamping force to the human tissue, the stable clamping effect is realized, and the slipping of the human tissue is avoided. In contrast, the prior art often adopts the scheme shown in fig. 4, when the angle of furling the second arms is insufficient, for example, when the included angle between two second arms is about 30 °, a large gap exists between the upper clamp base and the second arms, the deformation amount of the first arm is insufficient, and sufficient clamping force cannot be provided, and human tissues such as valve leaflets have the risk of slipping due to insufficient stress, resulting in failure of the operation. The prior art has solved the problem by folding the second arm and the first arm of the leaflet clipping device to a small angle, but this solution causes the problem of perforation and even tearing of the leaflets due to excessive deformation of the leaflets caused by further pulling the leaflets. Meanwhile, excessive furling of the clamping piece can also lead to the increase of the stress of the connecting end part of the clamping piece, cause the damage or fatigue of the clamping piece, and reduce the service life of the instrument. Therefore, in the prior art, the elastic clamping piece has a limited furling angle, namely a limit angle, the furling angle of the upper clamping mechanism in the general furling process is smaller than the limit angle, otherwise, the furling angle is too small, so that the device is damaged, the service life is shortened and the like. On the contrary, the elastic element is arranged on the clamping piece, so that the clamping piece can be prevented from being lifted by the control wire to be directly attached to the upper clamp base, the deformation amount of the clamping piece is reduced, and the stress of the bent part is reduced. The design can not only improve the fatigue resistance of the elastic clamping piece, but also reduce the stress of the elastic clamping piece in the furled state, reduce the pulling force required for pulling the elastic clamping piece to the furled state and prevent the control mechanism (such as a control wire) from breaking. It can be understood that the clamping piece is made of elastic materials or shape memory materials, and has the capability of restoring to the original shape after the external force is removed, so that the clamping piece is matched with the second arm to realize the clamping effect. The external force may be applied through a control wire 301, as shown in fig. 3, and the control wire 301 is engaged with the free end 302 of the first arm, so that the operator can control the furled state of the clamping member through the control wire. The closed position is the position in which the clamping members are retracted from their natural position shown in figure 1 to a small angle as shown in figure 3.

Optionally, the mounting portion includes a connection base, and as shown in fig. 2, a mounting through hole 201 is formed in the connection base. In practice, a pin or the like may be inserted into the through hole 201 to connect the clamp and the upper clamp base. At least one barb 104 is arranged on one side of the first arm, which is abutted against human tissue. As shown in figures 1 and 2, the barbs can be arranged in two rows or even multiple rows, and each row is provided with one or more barbs, so that the friction force between the clamping piece and the human tissue is increased, and the clamping stability is improved. Optionally, the part that barb and first arm are connected is provided with the fillet in order fixed with first arm, and the fillet excessively can reduce the stress concentration problem of barb and first arm coupling part, improves the life of apparatus.

Optionally, the number of the first arms is two, and the first arms are disposed on the left and right sides of the connection base, and the connection base is connected with the first arms through bent connection pieces 105. In actual use, a proper manufacturing process can be selected according to different manufacturing materials. If the connecting base, the connecting piece and the first arm are integrally formed, the three parts can be separately formed and connected to form a whole.

Optionally, the bending radius of the first bending section of the connecting piece 105 connected to the connecting base is R1, and the bending radius of the second bending section of the connecting piece connected to the first arm is R2, where R1 is less than or equal to R2. Referring to fig. 1 and 3, during operation, the second bending section of the clamping member deforms a larger amount, so that a larger bending radius is required to avoid excessive deformation and fracture. And the deformation of the first bending reducing is small, the radius of the first bending reducing can be properly reduced, so that the overall volume of the instrument is reduced, the instrument is convenient to operate, and the risk after operation is reduced. Alternatively, R2 may be sized larger than R1. Considering that the instrument needs to have a small size for implantation into the human body, too small a bending radius may cause material fracture, while too large a bending radius may result in an oversized instrument. Therefore, experiments confirm that the minimum bending radius of about 0.5mm can obtain a better balance relationship between the structural strength and the external dimension, and the radius can be increased properly in practical use, such as selecting the radius of 0.5-1.2mm, of course, the upper limit radius dimension is not limited to 1.2mm and can be adjusted properly. In practice, it has been found, both by numerical simulation and by physical experiment, that the solution in which R1 and R2 are set to the same value, the local equivalent strain, or so-called strain, of the clamp is minimal, and the stresses are also minimal, with respect to the solution in which R1 and R2 are not equal. Due to the wide range of values of R1 and R2, only partial simulation results are shown here as an example, wherein the three clamps are identical in structure except for the difference in values of R1 and R2, the simulation conditions are the same, the fixing positions of the wires at the ends of the clamps are the same, the wires are set to be pulled up by 9mm, and the material properties are shown in table 1. In the first clamping piece, R1-R2-1.16 mm, the maximum equal effect becomes 3.04%; in the second clamping piece, the maximum equal effect becomes 3.4% when R1 is 0.66mm and R2 is 1.16 mm; in the third clamping piece, the maximum equal effect becomes 4.4% when R1 is 1.16mm and R2 is 0.66 mm. In addition, in the production, when R1 and R2 are different, a worker or an automated production equipment needs to adjust the working position of the clamping member to align the bending part with the corresponding tool, and then perform bending. At this time, two bending devices are required to be arranged, the alignment position is strictly controlled, and the production cost is high. Especially, when a worker manually processes a bending angle, the bending part is not aligned with a correct tool due to misoperation, and parts are scrapped. Therefore, on the basis of proving the equal feasibility of R1 and R2 through experiments, the utility model determines that the same tools and processes can be adopted to process the bending angle during manufacturing, reduces the processing cost, eliminates the misoperation of the bending angle and improves the production efficiency.

TABLE 1

Isotropic Elasticity
			Derive from	Young's Modulus and Poisson's Ratio
Young's Modulus	60000	MPa
			Poisson's Ratio	0.33
Bulk Modulus	5.8824E+10	Pa
			Shear Modulus	2.2556E+10	Pa
Superelasticity
			Sigma SAS	510	MPa
Sigma FAS	560	MPa
			Sigma SSA	300	MPa
Sigma FSA	200	MPa

Optionally, the bending length of the first bending section is greater than or equal to the bending length of the second bending section. In actual use, length of buckling is too big, can lead to elasticity too big, and operating personnel need apply great power to the control wire and just can make the holder draw in, has increased the degree of difficulty of operation to this kind of setting also can lead to the resilience force too big. Therefore, in one embodiment of the present invention, the length of the first bend section is set to be not less than the length of the second bend section. The length of the bending section refers to the length of the bending section measured along the direction of the bending arc shown in fig. 1 (the projection direction shown in fig. 1).

Optionally, the elastic element is at least one of an elastic sheet, an elastic block or a spring. In practice, the resilient member may take a variety of structural arrangements, such as the resilient sheet structure shown in FIG. 1. Of course, the elastomeric structures shown in fig. 5 and 6 may also be used. Wherein the elastic body in fig. 5 (see the oval part in fig. 5) can be made of nitinol mesh. The elastomer in fig. 6 may be silica gel, polymer woven fabric, latex, or the like. The above materials can store or release elastic force by changing the amount of deformation. Optionally, the elastic element may also adopt a spring structure, such as the spring structure integrally formed by a nickel-titanium wire shown in fig. 7; or a spring structure made of integrally formed sheets as shown in fig. 8; or a spring structure made of polymer fabric or nickel titanium and the like as shown in fig. 9; or as shown in fig. 10, the holding piece is made of nickel titanium and the like by integral molding, and the free end of the holding piece is wound to form a spring structure; or as shown in fig. 11, a conventional spring structure is employed and fixed to one side of the first arm. It should be noted that the resilient element can be made of a variety of compressible materials including, but not limited to, silicone, PET, PTFE, metal alloys, and the like. The shape of the elastic element can be spherical, cubic, spiral, rolling body or irregular body. After the PET film is folded in half, the elastic clamping piece is sewed.

Alternatively, as shown in fig. 12, in the unstressed free state, the angle between the two first arms is greater than or equal to 120 °.

Optionally, as shown in fig. 1, 13 and 14, the elastic element is an elastic piece, and only one end of the elastic piece is fixedly connected with the first arm. In particular, the illustrated resilient tab may be of an arcuate configuration, the tab being attached to the free end of the first arm, the tab having at least one protrusion 1401 thereon, the protrusion having a height greater than 0.2mm, thereby creating a sufficient amount of deformation to adjust the clamping force. The resilient tab is provided with attachment points 1402 for attachment to the first arm.

Optionally, the clip is made of a memory alloy material, such as a shape memory material, including but not limited to nitinol. Of course, the memory alloy has super elastic properties. In some embodiments, a superelastic material may be used.

According to a second aspect of embodiments of the present invention, there is provided a method of using a resilient clamp.

In particular, the method of using the resilient clamp is for operating the clamp described in any of the previous embodiments. Referring to fig. 3, the using method comprises the following steps:

first, the control wire is operated, such as by pulling the control wire, to cause the first arm of the elastic clamping member to be folded, i.e., to approach the upper clamp base 305, so that the clamping member is in an elastically folded state;

then, operating the second arm 304 of the lower clamping mechanism, releasing the first arm through the control wire after the second arm contacts the human tissue 303 and forms a proper contact area, so that the first arm moves away from the upper clamping base to the second arm 304, and the human tissue is clamped between the first arm and the second arm;

the second arm 304 of the lower clamping mechanism is continuously operated to enable the second arm to draw close to the upper clamping base, and the first arm and the human tissue are driven to be synchronously drawn in during the movement process of the second arm, so that the elastic element is abutted against the upper clamping base to adjust the clamping force applied to the human tissue. The adjustment of the clamping force is essentially achieved by automatic adjustment of the amount of deformation of the elastic element. It will be appreciated that as the angle of convergence decreases, the amount of deformation of the clamping member increases, resulting in a gradual increase in the clamping force. The arrangement of the elastic element makes the scheme of the utility model obviously different from the prior art, and not only solves the problem that the human tissue is separated due to insufficient holding force, but also solves the problem that the tissue is torn due to overlarge holding force by adjusting the holding force.

According to a third aspect of embodiments of the present invention, there is provided a clamping device.

Referring to fig. 3, 15-16, the clamping device includes a clamping member as described in any of the previous embodiments. The clamping device further comprises: an upper clamp base 305, one end (lower end as shown in fig. 15-16) of which is connected to the mounting portion to fix the clamping member; the clamping device also comprises a lower clamping mechanism which is arranged at one end of the upper clamping base so that the clamping piece is positioned between the lower clamping mechanism and the upper clamping base; the second arm 304 of the lower clamping mechanism is arranged corresponding to the first arm of the clamping piece to clamp the human tissue. In this embodiment, the clamping member serves as an upper clamping mechanism, which is used in cooperation with a lower clamping mechanism.

Optionally, the lower clamping mechanism further comprises a push rod 1502, a push rod head 1503 and a rotating arm 306; one end of the rotating arm is pivoted with the push rod head, the other end of the rotating arm is pivoted with the second arm 304, and the push rod is connected with the push rod head to push the push rod head to extend or retract so as to control the folding state of the second arm. As shown in fig. 3, 15-16, the upper clamp base 305 is accommodated in the connecting base, and the shape of the elastic clamping piece is matched with that of the upper clamp base; the push rod 1502 is operated by the proximal handle to drive the push rod head 1503, the push rod head transmits force to the rotating arm 306, and the rotating arm 306 drives the second arm 304 to perform opening and closing movements. It will be appreciated that the length of the pivot arm 306 is variable under external forces.

According to a fourth aspect of embodiments of the present invention, there is provided a method of using a clamping device. The method of use is for operating a clamping device as described in any of the preceding embodiments. The using method comprises the following steps:

the second arm 304 of the lower clamping mechanism is continuously operated to enable the second arm to draw close to the upper clamping base, and the first arm and the human tissue are driven to be synchronously drawn in during the movement process of the second arm, so that the elastic element is abutted against the upper clamping base to adjust the clamping force applied to the human tissue. The adjustment of the clamping force is essentially achieved by automatic adjustment of the amount of deformation of the elastic element. The arrangement of the elastic element makes the scheme of the utility model obviously different from the prior art, and not only solves the problem that the human tissue is separated due to insufficient holding force, but also solves the problem that the tissue is torn due to overlarge holding force by adjusting the holding force.

Optionally, in the using method, the lower clamping mechanism further includes a push rod, a push rod head and a rotating arm; one end of the rotating arm is pivoted with the push rod head, the other end of the rotating arm is pivoted with the second arm, and the push rod is connected with the push rod head to push the push rod head to extend out or retract so as to control the folding state of the second arm.

Alternatively, in another embodiment as shown in fig. 17-22, the clip member is provided with undercuts 911, which are divided into groups, with at least one group in one embodiment, and at least two undercuts on each group. In the embodiment shown in fig. 17-22, there are two sets of inversions, and there are 4 inversions distributed on the circumference around the upper clamp base 900, the upper clamp base 900 is connected with the clamping member 910 through the inversions 911, and the inversions 911 abut against the bosses 912 of the upper clamp base to limit the radial and axial movement of the elastic member and prevent the elastic member from rotating and falling off. In the view shown in fig. 21, the maximum distance between a set of elastic member inversions 911 (i.e., inversions symmetrically disposed on both left and right sides of the elastic member) disposed along the symmetry plane perpendicular to the paper surface is smaller than the maximum contour 916 of the upper clip base, so that the elastic member is stably attached to the upper clip base. As shown, in the assembled state, the clamp base 913 contacts the upper clamp base 914 and the undercut 911 abuts the boss 912 of the upper clamp base, thereby limiting axial movement. Meanwhile, the minimum distance of the reverse buckles on both sides (i.e. on the same side as the first arm) is greater than the maximum distance between the two side edges 915 of the upper clamp base, so that the four reverse buckles can limit the radial movement of the elastic element.

Alternatively, as shown in fig. 23-25, in another embodiment, the through hole of the upper clamp base is matched with the pipe body to pass through the mounting through hole of the elastic member, the mounting through hole of the elastic member is a straight notch, and the through hole of the upper clamp base is a circular hole, so that the pipe body is utilized to limit the radial movement of the upper clamp through the matching relationship.

The above-described embodiments should not be construed as limiting the scope of the utility model. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A resilient clamp, comprising:

a mounting portion for fixing the elastic clamp;

2. The clip of claim 1,

be provided with the installation through-hole on the connection base, the one side that leans on with human tissue on the first arm is provided with at least one barb.

3. The clip of claim 2,

the first arms are two and are respectively arranged on the left side and the right side of the connecting base.

4. The clip of claim 1,

the other side of the first arm, which is opposite to the one side, is provided with an elastic element, and under the working state, the clamping force of the first arm on the human body tissue is adjusted by adjusting the deformation of the elastic element.

5. The clip according to any one of claims 1 to 4,

the bending length of the first bending section is greater than or equal to that of the second bending section.

6. The clip of claim 4,

the elastic element is at least one of an elastic sheet, an elastic block or a spring.

7. The clip of claim 4,

the elastic element is an elastic sheet, and only one end of the elastic sheet is fixedly connected with the first arm.

8. The clip according to any one of claims 1 to 4,

the clamping piece is made of a memory alloy material.

9. A clamping device comprising: the clip of any one of claims 1-8;

the method is characterized in that: also comprises

10. The clipping device according to claim 9,

the lower clamping mechanism also comprises a push rod, a push rod head and a rotating arm;

11. The clipping device according to claim 9,

the clamping piece is at least provided with a group of inversed buckles matched with the bosses of the upper clamping base, the bottom of the clamping piece contacts the bottom of the upper clamping base after assembly, and the inversed buckles abut against the bosses of the upper clamping base.

12. The clipping device according to claim 11,

the maximum distance between the left and right symmetrically arranged back-off parts of the clamping piece is smaller than the maximum outline size of the upper clamping base; the minimum distance between two back-off buttons on the same side of the first arm is greater than the maximum distance between two side edges of the upper clamp base.

13. The clipping device according to claim 9,

the pipe body is arranged in the longitudinal through hole of the upper clamp base and penetrates through the mounting through hole of the clamping piece, the mounting through hole is a straight notch, and the longitudinal through hole of the upper clamp base is a round hole.